diff options
Diffstat (limited to 'erts')
104 files changed, 11728 insertions, 6933 deletions
diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml index f8a92e1ec4..6221a239fa 100644 --- a/erts/doc/src/erl.xml +++ b/erts/doc/src/erl.xml @@ -586,7 +586,9 @@ <item> <p>Sets the maximum number of concurrent processes for this system. <c><![CDATA[Number]]></c> must be in the range 16..134217727. - Default is 32768.</p> + Default is 32768.</p> + <p><em>NOTE</em>: It is possible to choose any value in the range + but powers of 2 perform best.</p> </item> <tag><marker id="compat_rel"><c><![CDATA[+R ReleaseNumber]]></c></marker></tag> <item> diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml index e4f245975b..b5ddf0e17c 100644 --- a/erts/doc/src/erlang.xml +++ b/erts/doc/src/erlang.xml @@ -65,14 +65,14 @@ <funcs> <func> - <name>abs(Number) -> integer() | float()</name> + <name name="abs" arity="1" clause_i="1"/> + <name name="abs" arity="1" clause_i="2"/> + <type variable="Float" name_i="1"/> + <type variable="Int" name_i="2"/> <fsummary>Arithmetical absolute value</fsummary> - <type> - <v>Number = number()</v> - </type> <desc> <p>Returns an integer or float which is the arithmetical - absolute value of <c>Number</c>.</p> + absolute value of <c><anno>Float</anno></c> or <c><anno>Int</anno></c>.</p> <pre> > <input>abs(-3.33).</input> 3.33 @@ -82,26 +82,19 @@ </desc> </func> <func> - <name>erlang:adler32(Data) -> integer()</name> + <name name="adler32" arity="1"/> <fsummary>Compute adler32 checksum</fsummary> - <type> - <v>Data = iodata()</v> - </type> <desc> - <p>Computes and returns the adler32 checksum for <c>Data</c>.</p> + <p>Computes and returns the adler32 checksum for <c><anno>Data</anno></c>.</p> </desc> </func> <func> - <name>erlang:adler32(OldAdler, Data) -> integer()</name> + <name name="adler32" arity="2"/> <fsummary>Compute adler32 checksum</fsummary> - <type> - <v>OldAdler = integer()</v> - <v>Data = iodata()</v> - </type> <desc> <p>Continue computing the adler32 checksum by combining - the previous checksum, <c>OldAdler</c>, with the checksum of - <c>Data</c>.</p> + the previous checksum, <c><anno>OldAdler</anno></c>, with the checksum of + <c><anno>Data</anno></c>.</p> <p>The following code:</p> <code> X = erlang:adler32(Data1), @@ -114,12 +107,8 @@ </desc> </func> <func> - <name>erlang:adler32_combine(FirstAdler, SecondAdler, SecondSize) -> integer()</name> + <name name="adler32_combine" arity="3"/> <fsummary>Combine two adler32 checksums</fsummary> - <type> - <v>FirstAdler = SecondAdler = integer()</v> - <v>SecondSize = integer()</v> - </type> <desc> <p>Combines two previously computed adler32 checksums. This computation requires the size of the data object for @@ -138,18 +127,14 @@ </desc> </func> <func> - <name>erlang:append_element(Tuple1, Term) -> Tuple2</name> + <name name="append_element" arity="2"/> <fsummary>Append an extra element to a tuple</fsummary> - <type> - <v>Tuple1 = Tuple2 = tuple()</v> - <v>Term = term()</v> - </type> <desc> <p>Returns a new tuple which has one element more than - <c>Tuple1</c>, and contains the elements in <c>Tuple1</c> - followed by <c>Term</c> as the last element. Semantically + <c><anno>Tuple1</anno></c>, and contains the elements in <c><anno>Tuple1</anno></c> + followed by <c><anno>Term</anno></c> as the last element. Semantically equivalent to - <c>list_to_tuple(tuple_to_list(Tuple) ++ [Term])</c>, but much + <c>list_to_tuple(tuple_to_list(<anno>Tuple1</anno>) ++ [<anno>Term</anno>])</c>, but much faster.</p> <pre> > <input>erlang:append_element({one, two}, three).</input> @@ -204,27 +189,24 @@ </desc> </func> <func> - <name>atom_to_binary(Atom, Encoding) -> binary()</name> + <name name="atom_to_binary" arity="2"/> <fsummary>Return the binary representation of an atom</fsummary> - <type> - <v>Atom = atom()</v> - <v>Encoding = latin1 | utf8 | unicode</v> - </type> <desc> <p>Returns a binary which corresponds to the text - representation of <c>Atom</c>. If <c>Encoding</c> + representation of <c><anno>Atom</anno></c>. If <c><anno>Encoding</anno></c> is <c>latin1</c>, there will be one byte for each character - in the text representation. If <c>Encoding</c> is <c>utf8</c> or + in the text representation. If <c><anno>Encoding</anno></c> is + <c>utf8</c> or <c>unicode</c>, the characters will be encoded using UTF-8 (meaning that characters from 16#80 up to 0xFF will be encoded in two bytes).</p> - <note><p>Currently, <c>atom_to_binary(Atom, latin1)</c> can + <note><p>Currently, <c>atom_to_binary(<anno>Atom</anno>, latin1)</c> can never fail because the text representation of an atom can only contain characters from 0 to 16#FF. In a future release, the text representation of atoms might be allowed to contain any Unicode character - and <c>atom_to_binary(Atom, latin1)</c> will fail if the - text representation for the <c>Atom</c> contains a Unicode + and <c>atom_to_binary(<anno>Atom</anno>, latin1)</c> will fail if the + text representation for the <c><anno>Atom</anno></c> contains a Unicode character greater than 16#FF.</p></note> <pre> @@ -233,30 +215,21 @@ </desc> </func> <func> - <name>atom_to_list(Atom) -> string()</name> + <name name="atom_to_list" arity="1"/> <fsummary>Text representation of an atom</fsummary> - <type> - <v>Atom = atom()</v> - </type> <desc> <p>Returns a string which corresponds to the text - representation of <c>Atom</c>.</p> + representation of <c><anno>Atom</anno></c>.</p> <pre> > <input>atom_to_list('Erlang').</input> "Erlang"</pre> </desc> </func> <func> - <name>binary_part(Subject, PosLen) -> binary()</name> + <name name="binary_part" arity="2"/> <fsummary>Extracts a part of a binary</fsummary> - <type> - <v>Subject = binary()</v> - <v>PosLen = {Start,Length}</v> - <v>Start = integer() >= 0</v> - <v>Length = integer() >= 0</v> - </type> - <desc> - <p>Extracts the part of the binary described by <c>PosLen</c>.</p> + <desc> + <p>Extracts the part of the binary described by <c><anno>PosLen</anno></c>.</p> <p>Negative length can be used to extract bytes at the end of a binary:</p> @@ -266,53 +239,44 @@ <<6,7,8,9,10>> </code> - <p>If <c>PosLen</c> in any way references outside the binary, a <c>badarg</c> exception is raised.</p> + <p>If <c><anno>PosLen</anno></c> in any way references outside the binary, a <c>badarg</c> exception is raised.</p> - <p><c>Start</c> is zero-based, i.e.:</p> + <p><c><anno>Start</anno></c> is zero-based, i.e.:</p> <code> 1> Bin = <<1,2,3>> 2> binary_part(Bin,{0,2}). <<1,2>> </code> - <p>See the STDLIB module <c>binary</c> for details about the <c>PosLen</c> semantics.</p> + <p>See the STDLIB module <c>binary</c> for details about the <c><anno>PosLen</anno></c> semantics.</p> <p>Allowed in guard tests.</p> </desc> </func> <func> - <name>binary_part(Subject, Start, Length) -> binary()</name> + <name name="binary_part" arity="3"/> <fsummary>Extracts a part of a binary</fsummary> - <type> - <v>Subject = binary()</v> - <v>Start = integer() >= 0</v> - <v>Length = integer() >= 0</v> - </type> <desc> - <p>The same as <c>binary_part(Subject, {Pos, Len})</c>.</p> + <p>The same as <c>binary_part(<anno>Subject</anno>, {<anno>Start</anno>, <anno>Length</anno>})</c>.</p> <p>Allowed in guard tests.</p> </desc> </func> <func> - <name>binary_to_atom(Binary, Encoding) -> atom()</name> + <name name="binary_to_atom" arity="2"/> <fsummary>Convert from text representation to an atom</fsummary> - <type> - <v>Binary = binary()</v> - <v>Encoding = latin1 | utf8 | unicode</v> - </type> <desc> <p>Returns the atom whose text representation is - <c>Binary</c>. If <c>Encoding</c> is <c>latin1</c>, no - translation of bytes in the binary is done. If <c>Encoding</c> + <c><anno>Binary</anno></c>. If <c><anno>Encoding</anno></c> is <c>latin1</c>, no + translation of bytes in the binary is done. If <c><anno>Encoding</anno></c> is <c>utf8</c> or <c>unicode</c>, the binary must contain valid UTF-8 sequences; furthermore, only Unicode characters up to 0xFF are allowed.</p> - <note><p><c>binary_to_atom(Binary, utf8)</c> will fail if + <note><p><c>binary_to_atom(<anno>Binary</anno>, utf8)</c> will fail if the binary contains Unicode characters greater than 16#FF. In a future release, such Unicode characters might be allowed - and <c>binary_to_atom(Binary, utf8)</c> + and <c>binary_to_atom(<anno>Binary</anno>, utf8)</c> will not fail in that case.</p></note> <pre> @@ -325,12 +289,8 @@ </desc> </func> <func> - <name>binary_to_existing_atom(Binary, Encoding) -> atom()</name> + <name name="binary_to_existing_atom" arity="2"/> <fsummary>Convert from text representation to an atom</fsummary> - <type> - <v>Binary = binary()</v> - <v>Encoding = latin1 | utf8 | unicode</v> - </type> <desc> <p>Works like <seealso marker="#binary_to_atom/2">binary_to_atom/2</seealso>, but the atom must already exist.</p> @@ -338,27 +298,21 @@ </desc> </func> <func> - <name>binary_to_list(Binary) -> [char()]</name> + <name name="binary_to_list" arity="1"/> <fsummary>Convert a binary to a list</fsummary> - <type> - <v>Binary = binary()</v> - </type> <desc> <p>Returns a list of integers which correspond to the bytes of - <c>Binary</c>.</p> + <c><anno>Binary</anno></c>.</p> </desc> </func> <func> - <name>binary_to_list(Binary, Start, Stop) -> [char()]</name> + <name name="binary_to_list" arity="3"/> <fsummary>Convert part of a binary to a list</fsummary> - <type> - <v>Binary = binary()</v> - <v>Start = Stop = 1..byte_size(Binary)</v> - </type> + <type_desc variable="Start">1..byte_size(<anno>Binary</anno>)</type_desc> <desc> <p>As <c>binary_to_list/1</c>, but returns a list of integers - corresponding to the bytes from position <c>Start</c> to - position <c>Stop</c> in <c>Binary</c>. Positions in the + corresponding to the bytes from position <c><anno>Start</anno></c> to + position <c><anno>Stop</anno></c> in <c><anno>Binary</anno></c>. Positions in the binary are numbered starting from 1.</p> <note><p>This function's indexing style of using one-based indices for @@ -368,27 +322,21 @@ </desc> </func> <func> - <name>bitstring_to_list(Bitstring) -> [char()|bitstring()]</name> + <name name="bitstring_to_list" arity="1"/> <fsummary>Convert a bitstring to a list</fsummary> - <type> - <v>Bitstring = bitstring()</v> - </type> <desc> <p>Returns a list of integers which correspond to the bytes of - <c>Bitstring</c>. If the number of bits in the binary is not + <c><anno>Bitstring</anno></c>. If the number of bits in the binary is not divisible by 8, the last element of the list will be a bitstring containing the remaining bits (1 up to 7 bits).</p> </desc> </func> <func> - <name>binary_to_term(Binary) -> term()</name> + <name name="binary_to_term" arity="1"/> <fsummary>Decode an Erlang external term format binary</fsummary> - <type> - <v>Binary = <seealso marker="#type-ext_binary">ext_binary()</seealso></v> - </type> <desc> <p>Returns an Erlang term which is the result of decoding - the binary object <c>Binary</c>, which must be encoded + the binary object <c><anno>Binary</anno></c>, which must be encoded according to the Erlang external term format.</p> <warning> <p>When decoding binaries from untrusted sources, consider using @@ -401,12 +349,8 @@ </desc> </func> <func> - <name>binary_to_term(Binary, Opts) -> term()</name> + <name name="binary_to_term" arity="2"/> <fsummary>Decode an Erlang external term format binary</fsummary> - <type> - <v>Opts = [safe]</v> - <v>Binary = <seealso marker="#type-ext_binary">ext_binary()</seealso></v> - </type> <desc> <p>As <c>binary_to_term/1</c>, but takes options that affect decoding of the binary.</p> @@ -436,13 +380,10 @@ </desc> </func> <func> - <name>bit_size(Bitstring) -> integer() >= 0</name> + <name name="bit_size" arity="1"/> <fsummary>Return the size of a bitstring</fsummary> - <type> - <v>Bitstring = bitstring()</v> - </type> <desc> - <p>Returns an integer which is the size in bits of <c>Bitstring</c>.</p> + <p>Returns an integer which is the size in bits of <c><anno>Bitstring</anno></c>.</p> <pre> > <input>bit_size(<<433:16,3:3>>).</input> 19 @@ -452,11 +393,8 @@ </desc> </func> <func> - <name>erlang:bump_reductions(Reductions) -> void()</name> + <name name="bump_reductions" arity="1"/> <fsummary>Increment the reduction counter</fsummary> - <type> - <v>Reductions = integer() >= 0</v> - </type> <desc> <p>This implementation-dependent function increments the reduction counter for the calling process. In the Beam @@ -472,14 +410,11 @@ </desc> </func> <func> - <name>byte_size(Bitstring) -> integer() >= 0</name> + <name name="byte_size" arity="1"/> <fsummary>Return the size of a bitstring (or binary)</fsummary> - <type> - <v>Bitstring = bitstring()</v> - </type> <desc> <p>Returns an integer which is the number of bytes needed to contain - <c>Bitstring</c>. (That is, if the number of bits in <c>Bitstring</c> is not + <c><anno>Bitstring</anno></c>. (That is, if the number of bits in <c><anno>Bitstring</anno></c> is not divisible by 8, the resulting number of bytes will be rounded <em>up</em>.)</p> <pre> > <input>byte_size(<<433:16,3:3>>).</input> @@ -490,21 +425,17 @@ </desc> </func> <func> - <name>erlang:cancel_timer(TimerRef) -> Time | false</name> + <name name="cancel_timer" arity="1"/> <fsummary>Cancel a timer</fsummary> - <type> - <v>TimerRef = reference()</v> - <v>Time = integer() >= 0</v> - </type> <desc> - <p>Cancels a timer, where <c>TimerRef</c> was returned by + <p>Cancels a timer, where <c><anno>TimerRef</anno></c> was returned by either <seealso marker="#send_after/3">erlang:send_after/3</seealso> or <seealso marker="#start_timer/3">erlang:start_timer/3</seealso>. If the timer is there to be removed, the function returns the time in milliseconds left until the timer would have expired, - otherwise <c>false</c> (which means that <c>TimerRef</c> was + otherwise <c>false</c> (which means that <c><anno>TimerRef</anno></c> was never a timer, that it has already been cancelled, or that it has already delivered its message).</p> <p>See also @@ -518,27 +449,20 @@ </func> <func> - <name>check_old_code(Module) -> boolean()</name> + <name name="check_old_code" arity="1"/> <fsummary>Check if a module has old code</fsummary> - <type> - <v>Module = atom()</v> - </type> <desc> - <p>Returns <c>true</c> if the <c>Module</c> has old code, + <p>Returns <c>true</c> if the <c><anno>Module</anno></c> has old code, and <c>false</c> otherwise.</p> <p>See also <seealso marker="kernel:code">code(3)</seealso>.</p> </desc> </func> <func> - <name>check_process_code(Pid, Module) -> boolean()</name> + <name name="check_process_code" arity="2"/> <fsummary>Check if a process is executing old code for a module</fsummary> - <type> - <v>Pid = pid()</v> - <v>Module = atom()</v> - </type> <desc> - <p>Returns <c>true</c> if the process <c>Pid</c> is executing - old code for <c>Module</c>. That is, if the current call of + <p>Returns <c>true</c> if the process <c><anno>Pid</anno></c> is executing + old code for <c><anno>Module</anno></c>. That is, if the current call of the process executes old code for this module, or if the process has references to old code for this module, or if the process contains funs that references old code for this @@ -550,26 +474,19 @@ false</pre> </desc> </func> <func> - <name>erlang:crc32(Data) -> integer() >= 0</name> + <name name="crc32" arity="1"/> <fsummary>Compute crc32 (IEEE 802.3) checksum</fsummary> - <type> - <v>Data = iodata()</v> - </type> <desc> - <p>Computes and returns the crc32 (IEEE 802.3 style) checksum for <c>Data</c>.</p> + <p>Computes and returns the crc32 (IEEE 802.3 style) checksum for <c><anno>Data</anno></c>.</p> </desc> </func> <func> - <name>erlang:crc32(OldCrc, Data) -> integer() >= 0</name> + <name name="crc32" arity="2"/> <fsummary>Compute crc32 (IEEE 802.3) checksum</fsummary> - <type> - <v>OldCrc = integer() >= 0</v> - <v>Data = iodata()</v> - </type> <desc> <p>Continue computing the crc32 checksum by combining - the previous checksum, <c>OldCrc</c>, with the checksum of - <c>Data</c>.</p> + the previous checksum, <c><anno>OldCrc</anno></c>, with the checksum of + <c><anno>Data</anno></c>.</p> <p>The following code:</p> <code> X = erlang:crc32(Data1), @@ -582,12 +499,8 @@ false</pre> </desc> </func> <func> - <name>erlang:crc32_combine(FirstCrc, SecondCrc, SecondSize) -> integer() >= 0</name> + <name name="crc32_combine" arity="3"/> <fsummary>Combine two crc32 (IEEE 802.3) checksums</fsummary> - <type> - <v>FirstCrc = SecondCrc = integer() >= 0</v> - <v>SecondSize = integer() >= 0</v> - </type> <desc> <p>Combines two previously computed crc32 checksums. This computation requires the size of the data object for @@ -606,11 +519,8 @@ false</pre> </desc> </func> <func> - <name>date() -> Date</name> + <name name="date" arity="0"/> <fsummary>Current date</fsummary> - <type> - <v>Date = <seealso marker="calendar#type-date">calendar:date()</seealso></v> - </type> <desc> <p>Returns the current date as <c>{Year, Month, Day}</c>.</p> <p>The time zone and daylight saving time correction depend on @@ -621,47 +531,24 @@ false</pre> </desc> </func> <func> - <name>erlang:decode_packet(Type,Bin,Options) -> {ok,Packet,Rest} | {more,Length} | {error,Reason}</name> + <name name="decode_packet" arity="3"/> <fsummary>Extracts a protocol packet from a binary</fsummary> - <type> - <v>Bin = binary()</v> - <v>Options = [Opt]</v> - <v>Packet = binary() | HttpPacket</v> - <v>Rest = binary()</v> - <v>Length = integer() > 0 | undefined</v> - <v>Reason = term()</v> - <v> Type, Opt -- see below</v> - <v></v> - <v>HttpPacket = HttpRequest | HttpResponse | HttpHeader | http_eoh | HttpError</v> - <v>HttpRequest = {http_request, HttpMethod, HttpUri, HttpVersion}</v> - <v>HttpResponse = {http_response, HttpVersion, integer(), HttpString}</v> - <v>HttpHeader = {http_header, integer(), HttpField, Reserved=term(), Value=HttpString}</v> - <v>HttpError = {http_error, HttpString}</v> - <v>HttpMethod = HttpMethodAtom | HttpString</v> - <v>HttpMethodAtom = 'OPTIONS' | 'GET' | 'HEAD' | 'POST' | 'PUT' | 'DELETE' | 'TRACE'</v> - <v>HttpUri = '*' | {absoluteURI, http|https, Host=HttpString, Port=integer()|undefined, Path=HttpString} | - {scheme, Scheme=HttpString, HttpString} | {abs_path, HttpString} | HttpString</v> - <v>HttpVersion = {Major=integer(), Minor=integer()}</v> - <v>HttpString = string() | binary()</v> - <v>HttpField = HttpFieldAtom | HttpString</v> - <v>HttpFieldAtom = 'Cache-Control' | 'Connection' | 'Date' | 'Pragma' | 'Transfer-Encoding' | 'Upgrade' | 'Via' | 'Accept' | 'Accept-Charset' | 'Accept-Encoding' | 'Accept-Language' | 'Authorization' | 'From' | 'Host' | 'If-Modified-Since' | 'If-Match' | 'If-None-Match' | 'If-Range' | 'If-Unmodified-Since' | 'Max-Forwards' | 'Proxy-Authorization' | 'Range' | 'Referer' | 'User-Agent' | 'Age' | 'Location' | 'Proxy-Authenticate' | 'Public' | 'Retry-After' | 'Server' | 'Vary' | 'Warning' | 'Www-Authenticate' | 'Allow' | 'Content-Base' | 'Content-Encoding' | 'Content-Language' | 'Content-Length' | 'Content-Location' | 'Content-Md5' | 'Content-Range' | 'Content-Type' | 'Etag' | 'Expires' | 'Last-Modified' | 'Accept-Ranges' | 'Set-Cookie' | 'Set-Cookie2' | 'X-Forwarded-For' | 'Cookie' | 'Keep-Alive' | 'Proxy-Connection'</v> - <v></v> - </type> - <desc> - <p>Decodes the binary <c>Bin</c> according to the packet - protocol specified by <c>Type</c>. Very similar to the packet - handling done by sockets with the option {packet,Type}.</p> - <p>If an entire packet is contained in <c>Bin</c> it is + <desc> + + <p>Decodes the binary <c><anno>Bin</anno></c> according to the packet + protocol specified by <c><anno>Type</anno></c>. Very similar to the packet + handling done by sockets with the option {packet,<anno>Type</anno>}.</p> + <p>If an entire packet is contained in <c><anno>Bin</anno></c> it is returned together with the remainder of the binary as - <c>{ok,Packet,Rest}</c>.</p> - <p>If <c>Bin</c> does not contain the entire packet, - <c>{more,Length}</c> is returned. <c>Length</c> is either the + <c>{ok,<anno>Packet</anno>,<anno>Rest</anno>}</c>.</p> + <p>If <c><anno>Bin</anno></c> does not contain the entire packet, + <c>{more,<anno>Length</anno>}</c> is returned. <c><anno>Length</anno></c> is either the expected <em>total size</em> of the packet or <c>undefined</c> if the expected packet size is not known. <c>decode_packet</c> can then be called again with more data added.</p> <p>If the packet does not conform to the protocol format - <c>{error,Reason}</c> is returned.</p> - <p>The following values of <c>Type</c> are valid:</p> + <c>{error,<anno>Reason</anno>}</c> is returned.</p> + <p>The following values of <c><anno>Type</anno></c> are valid:</p> <taglist> <tag><c>raw | 0</c></tag> <item> @@ -699,15 +586,15 @@ false</pre> <item> <p>The Hypertext Transfer Protocol. The packets are returned with the format according to - <c>HttpPacket</c> described above. A packet is either a + <c><anno>HttpPacket</anno></c> described above. A packet is either a request, a response, a header or an end of header - mark. Invalid lines are returned as <c>HttpError</c>.</p> + mark. Invalid lines are returned as <c><anno>HttpError</anno></c>.</p> <p>Recognized request methods and header fields are returned as atoms. Others are returned as strings.</p> <p>The protocol type <c>http</c> should only be used for - the first line when a <c>HttpRequest</c> or a - <c>HttpResponse</c> is expected. The following calls - should use <c>httph</c> to get <c>HttpHeader</c>'s until + the first line when a <c><anno>HttpRequest</anno></c> or a + <c><anno>HttpResponse</anno></c> is expected. The following calls + should use <c>httph</c> to get <c><anno>HttpHeader</anno></c>'s until <c>http_eoh</c> is returned that marks the end of the headers and the beginning of any following message body.</p> <p>The variants <c>http_bin</c> and <c>httph_bin</c> will return @@ -716,14 +603,14 @@ false</pre> </taglist> <p>The following options are available:</p> <taglist> - <tag><c>{packet_size, integer()}</c></tag> + <tag><c>{packet_size, integer() >= 0}</c></tag> <item><p>Sets the max allowed size of the packet body. If the packet header indicates that the length of the packet is longer than the max allowed length, the packet is considered invalid. Default is 0 which means no size limit.</p> </item> - <tag><c>{line_length, integer()}</c></tag> + <tag><c>{line_length, integer() >= 0}</c></tag> <item><p>For packet type <c>line</c>, truncate lines longer than the indicated length.</p> <p>Option <c>line_length</c> also applies to <c>http*</c> @@ -740,13 +627,10 @@ false</pre> </desc> </func> <func> - <name>delete_module(Module) -> true | undefined</name> + <name name="delete_module" arity="1"/> <fsummary>Make the current code for a module old</fsummary> - <type> - <v>Module = atom()</v> - </type> <desc> - <p>Makes the current code for <c>Module</c> become old code, and + <p>Makes the current code for <c><anno>Module</anno></c> become old code, and deletes all references for this module from the export table. Returns <c>undefined</c> if the module does not exist, otherwise <c>true</c>.</p> @@ -760,27 +644,24 @@ false</pre> </desc> </func> <func> - <name>demonitor(MonitorRef) -> true</name> + <name name="demonitor" arity="1"/> <fsummary>Stop monitoring</fsummary> - <type> - <v>MonitorRef = reference()</v> - </type> <desc> - <p>If <c>MonitorRef</c> is a reference which the calling process + <p>If <c><anno>MonitorRef</anno></c> is a reference which the calling process obtained by calling <seealso marker="#monitor/2">monitor/2</seealso>, this monitoring is turned off. If the monitoring is already turned off, nothing happens.</p> - <p>Once <c>demonitor(MonitorRef)</c> has returned it is - guaranteed that no <c>{'DOWN', MonitorRef, _, _, _}</c> message + <p>Once <c>demonitor(<anno>MonitorRef</anno>)</c> has returned it is + guaranteed that no <c>{'DOWN', <anno>MonitorRef</anno>, _, _, _}</c> message due to the monitor will be placed in the caller's message queue - in the future. A <c>{'DOWN', MonitorRef, _, _, _}</c> message + in the future. A <c>{'DOWN', <anno>MonitorRef</anno>, _, _, _}</c> message might have been placed in the caller's message queue prior to the call, though. Therefore, in most cases, it is advisable to remove such a <c>'DOWN'</c> message from the message queue after monitoring has been stopped. - <seealso marker="#demonitor/2">demonitor(MonitorRef, [flush])</seealso> can be used instead of - <c>demonitor(MonitorRef)</c> if this cleanup is wanted.</p> + <seealso marker="#demonitor/2">demonitor(<anno>MonitorRef</anno>, [flush])</seealso> can be used instead of + <c>demonitor(<anno>MonitorRef</anno>)</c> if this cleanup is wanted.</p> <note> <p>Prior to OTP release R11B (erts version 5.5) <c>demonitor/1</c> behaved completely asynchronous, i.e., the monitor was active @@ -792,35 +673,30 @@ false</pre> asynchronously send a "demonitor signal" to the monitored entity and ignore any future results of the monitor. </p> </note> - <p>Failure: It is an error if <c>MonitorRef</c> refers to a + <p>Failure: It is an error if <c><anno>MonitorRef</anno></c> refers to a monitoring started by another process. Not all such cases are cheap to check; if checking is cheap, the call fails with - <c>badarg</c> (for example if <c>MonitorRef</c> is a remote + <c>badarg</c> (for example if <c><anno>MonitorRef</anno></c> is a remote reference).</p> </desc> </func> <func> - <name>demonitor(MonitorRef, OptionList) -> boolean()</name> + <name name="demonitor" arity="2"/> <fsummary>Stop monitoring</fsummary> - <type> - <v>MonitorRef = reference()</v> - <v>OptionList = [Option]</v> - <v> Option = flush | info</v> - </type> <desc> <p>The returned value is <c>true</c> unless <c>info</c> is part - of <c>OptionList</c>. + of <c><anno>OptionList</anno></c>. </p> - <p><c>demonitor(MonitorRef, [])</c> is equivalent to - <seealso marker="#demonitor/1">demonitor(MonitorRef)</seealso>.</p> - <p>Currently the following <c>Option</c>s are valid:</p> + <p><c>demonitor(<anno>MonitorRef</anno>, [])</c> is equivalent to + <seealso marker="#demonitor/1">demonitor(<anno>MonitorRef</anno>)</seealso>.</p> + <p>Currently the following <c><anno>Option</anno></c>s are valid:</p> <taglist> <tag><c>flush</c></tag> <item> - <p>Remove (one) <c>{_, MonitorRef, _, _, _}</c> message, + <p>Remove (one) <c>{_, <anno>MonitorRef</anno>, _, _, _}</c> message, if there is one, from the caller's message queue after monitoring has been stopped.</p> - <p>Calling <c>demonitor(MonitorRef, [flush])</c> + <p>Calling <c>demonitor(<anno>MonitorRef</anno>, [flush])</c> is equivalent to the following, but more efficient:</p> <code type="none"> @@ -860,8 +736,8 @@ false</pre> <note> <p>More options may be added in the future.</p> </note> - <p>Failure: <c>badarg</c> if <c>OptionList</c> is not a list, or - if <c>Option</c> is not a valid option, or the same failure as for + <p>Failure: <c>badarg</c> if <c><anno>OptionList</anno></c> is not a list, or + if <c><anno>Option</anno></c> is not a valid option, or the same failure as for <seealso marker="#demonitor/1">demonitor/1</seealso></p> </desc> </func> @@ -878,13 +754,10 @@ false</pre> </desc> </func> <func> - <name>erlang:display(Term) -> true</name> + <name name="display" arity="1"/> <fsummary>Print a term on standard output</fsummary> - <type> - <v>Term = term()</v> - </type> <desc> - <p>Prints a text representation of <c>Term</c> on the standard + <p>Prints a text representation of <c><anno>Term</anno></c> on the standard output.</p> <warning> <p>This BIF is intended for debugging only.</p> @@ -892,15 +765,12 @@ false</pre> </desc> </func> <func> - <name>element(N, Tuple) -> term()</name> + <name name="element" arity="2"/> + <type_desc variable="N">1..tuple_size(<anno>Tuple</anno>)</type_desc> <fsummary>Get Nth element of a tuple</fsummary> - <type> - <v>N = 1..tuple_size(Tuple)</v> - <v>Tuple = tuple()</v> - </type> <desc> - <p>Returns the <c>N</c>th element (numbering from 1) of - <c>Tuple</c>.</p> + <p>Returns the <c><anno>N</anno></c>th element (numbering from 1) of + <c><anno>Tuple</anno></c>.</p> <pre> > <input>element(2, {a, b, c}).</input> b</pre> @@ -908,11 +778,8 @@ b</pre> </desc> </func> <func> - <name>erase() -> [{Key, Val}]</name> + <name name="erase" arity="0"/> <fsummary>Return and delete the process dictionary</fsummary> - <type> - <v>Key = Val = term()</v> - </type> <desc> <p>Returns the process dictionary and deletes it.</p> <pre> @@ -923,15 +790,12 @@ b</pre> </desc> </func> <func> - <name>erase(Key) -> Val | undefined</name> + <name name="erase" arity="1"/> <fsummary>Return and delete a value from the process dictionary</fsummary> - <type> - <v>Key = Val = term()</v> - </type> <desc> - <p>Returns the value <c>Val</c> associated with <c>Key</c> and + <p>Returns the value <c><anno>Val</anno></c> associated with <c><anno>Key</anno></c> and deletes it from the process dictionary. Returns - <c>undefined</c> if no value is associated with <c>Key</c>.</p> + <c>undefined</c> if no value is associated with <c><anno>Key</anno></c>.</p> <pre> > <input>put(key1, {merry, lambs, are, playing}),</input> <input>X = erase(key1),</input> @@ -940,15 +804,12 @@ b</pre> </desc> </func> <func> - <name>error(Reason)</name> + <name name="error" arity="1"/> <fsummary>Stop execution with a given reason</fsummary> - <type> - <v>Reason = term()</v> - </type> <desc> <p>Stops the execution of the calling process with the reason - <c>Reason</c>, where <c>Reason</c> is any term. The actual - exit reason will be <c>{Reason, Where}</c>, where <c>Where</c> + <c><anno>Reason</anno></c>, where <c><anno>Reason</anno></c> is any term. The actual + exit reason will be <c>{<anno>Reason</anno>, Where}</c>, where <c>Where</c> is a list of the functions most recently called (the current function first). Since evaluating this function causes the process to terminate, it has no return value.</p> @@ -962,18 +823,14 @@ b</pre> </desc> </func> <func> - <name>error(Reason, Args)</name> + <name name="error" arity="2"/> <fsummary>Stop execution with a given reason</fsummary> - <type> - <v>Reason = term()</v> - <v>Args = [term()]</v> - </type> <desc> <p>Stops the execution of the calling process with the reason - <c>Reason</c>, where <c>Reason</c> is any term. The actual - exit reason will be <c>{Reason, Where}</c>, where <c>Where</c> + <c><anno>Reason</anno></c>, where <c><anno>Reason</anno></c> is any term. The actual + exit reason will be <c>{<anno>Reason</anno>, Where}</c>, where <c>Where</c> is a list of the functions most recently called (the current - function first). <c>Args</c> is expected to be the list of + function first). <c><anno>Args</anno></c> is expected to be the list of arguments for the current function; in Beam it will be used to provide the actual arguments for the current function in the <c>Where</c> term. Since evaluating this function causes @@ -981,14 +838,11 @@ b</pre> </desc> </func> <func> - <name>exit(Reason)</name> + <name name="exit" arity="1"/> <fsummary>Stop execution with a given reason</fsummary> - <type> - <v>Reason = term()</v> - </type> <desc> <p>Stops the execution of the calling process with the exit - reason <c>Reason</c>, where <c>Reason</c> is any term. Since + reason <c><anno>Reason</anno></c>, where <c><anno>Reason</anno></c> is any term. Since evaluating this function causes the process to terminate, it has no return value.</p> <pre> @@ -999,78 +853,67 @@ b</pre> </desc> </func> <func> - <name>exit(Pid, Reason) -> true</name> + <name name="exit" arity="2"/> <fsummary>Send an exit signal to a process</fsummary> - <type> - <v>Pid = pid()</v> - <v>Reason = term()</v> - </type> - <desc> - <p>Sends an exit signal with exit reason <c>Reason</c> to - the process <c>Pid</c>.</p> - <p>The following behavior apply if <c>Reason</c> is any term + <desc> + <p>Sends an exit signal with exit reason <c><anno>Reason</anno></c> to + the process <c><anno>Pid</anno></c>.</p> + <p>The following behavior apply if <c><anno>Reason</anno></c> is any term except <c>normal</c> or <c>kill</c>:</p> - <p>If <c>Pid</c> is not trapping exits, <c>Pid</c> itself will - exit with exit reason <c>Reason</c>. If <c>Pid</c> is trapping + <p>If <c><anno>Pid</anno></c> is not trapping exits, <c><anno>Pid</anno></c> itself will + exit with exit reason <c><anno>Reason</anno></c>. If <c><anno>Pid</anno></c> is trapping exits, the exit signal is transformed into a message - <c>{'EXIT', From, Reason}</c> and delivered to the message - queue of <c>Pid</c>. <c>From</c> is the pid of the process + <c>{'EXIT', From, <anno>Reason</anno>}</c> and delivered to the message + queue of <c><anno>Pid</anno></c>. <c>From</c> is the pid of the process which sent the exit signal. See also <seealso marker="#process_flag/2">process_flag/2</seealso>.</p> - <p>If <c>Reason</c> is the atom <c>normal</c>, <c>Pid</c> will + <p>If <c><anno>Reason</anno></c> is the atom <c>normal</c>, <c><anno>Pid</anno></c> will not exit. If it is trapping exits, the exit signal is transformed into a message <c>{'EXIT', From, normal}</c> and delivered to its message queue.</p> - <p>If <c>Reason</c> is the atom <c>kill</c>, that is if - <c>exit(Pid, kill)</c> is called, an untrappable exit signal - is sent to <c>Pid</c> which will unconditionally exit with + <p>If <c><anno>Reason</anno></c> is the atom <c>kill</c>, that is if + <c>exit(<anno>Pid</anno>, kill)</c> is called, an untrappable exit signal + is sent to <c><anno>Pid</anno></c> which will unconditionally exit with exit reason <c>killed</c>.</p> </desc> </func> <func> - <name>erlang:external_size(Term) -> integer() >= 0</name> + <name name="external_size" arity="1"/> <fsummary>Calculate the maximum size for a term encoded in the Erlang external term format</fsummary> - <type> - <v>Term = term()</v> - </type> <desc> <p>Calculates, without doing the encoding, the maximum byte size for a term encoded in the Erlang external term format. The following condition applies always:</p> <p> <pre> -> <input>Size1 = byte_size(term_to_binary(Term)),</input> -> <input>Size2 = erlang:external_size(Term),</input> +> <input>Size1 = byte_size(term_to_binary(<anno>Term</anno>)),</input> +> <input>Size2 = erlang:external_size(<anno>Term</anno>),</input> > <input>true = Size1 =< Size2.</input> true </pre> </p> - <p>This is equivalent to a call to: <code>erlang:external_size(Term, []) + <p>This is equivalent to a call to: <code>erlang:external_size(<anno>Term</anno>, []) </code></p> </desc> </func> <func> - <name>erlang:external_size(Term, [Option]) -> integer() >= 0</name> + <name name="external_size" arity="2"/> <fsummary>Calculate the maximum size for a term encoded in the Erlang external term format</fsummary> - <type> - <v>Term = term()</v> - <v>Option = {minor_version, Version}</v> - </type> <desc> <p>Calculates, without doing the encoding, the maximum byte size for a term encoded in the Erlang external term format. The following condition applies always:</p> <p> <pre> -> <input>Size1 = byte_size(term_to_binary(Term, Options)),</input> -> <input>Size2 = erlang:external_size(Term, Options),</input> +> <input>Size1 = byte_size(term_to_binary(<anno>Term</anno>, <anno>Options</anno>)),</input> +> <input>Size2 = erlang:external_size(<anno>Term</anno>, <anno>Options</anno>),</input> > <input>true = Size1 =< Size2.</input> true </pre> </p> - <p>The option <c>{minor_version, Version}</c> specifies how floats + <p>The option <c>{minor_version, <anno>Version</anno>}</c> specifies how floats are encoded. See <seealso marker="#term_to_binary/2">term_to_binary/2</seealso> for a more detailed description. @@ -1078,13 +921,10 @@ true </desc> </func> <func> - <name>float(Number) -> float()</name> + <name name="float" arity="1"/> <fsummary>Convert a number to a float</fsummary> - <type> - <v>Number = number()</v> - </type> <desc> - <p>Returns a float by converting <c>Number</c> to a float.</p> + <p>Returns a float by converting <c><anno>Number</anno></c> to a float.</p> <pre> > <input>float(55).</input> 55.0</pre> @@ -1101,14 +941,11 @@ true </desc> </func> <func> - <name>float_to_list(Float) -> string()</name> + <name name="float_to_list" arity="1"/> <fsummary>Text representation of a float</fsummary> - <type> - <v>Float = float()</v> - </type> <desc> <p>Returns a string which corresponds to the text - representation of <c>Float</c>.</p> + representation of <c><anno>Float</anno></c>.</p> <pre> > <input>float_to_list(7.0).</input> "7.00000000000000000000e+00"</pre> @@ -1213,18 +1050,15 @@ true </desc> </func> <func> - <name>erlang:fun_info(Fun, Item) -> {Item, Info}</name> + <name name="fun_info" arity="2"/> + <type name="fun_info_item"/> <fsummary>Information about a fun</fsummary> - <type> - <v>Fun = fun()</v> - <v>Item, Info -- see below</v> - </type> - <desc> - <p>Returns information about <c>Fun</c> as specified by - <c>Item</c>, in the form <c>{Item,Info}</c>.</p> - <p>For any fun, <c>Item</c> can be any of the atoms + <desc> + <p>Returns information about <c><anno>Fun</anno></c> as specified by + <c><anno>Item</anno></c>, in the form <c>{<anno>Item</anno>,<anno>Info</anno>}</c>.</p> + <p>For any fun, <c><anno>Item</anno></c> can be any of the atoms <c>module</c>, <c>name</c>, <c>arity</c>, <c>env</c>, or <c>type</c>.</p> - <p>For a local fun, <c>Item</c> can also be any of the atoms + <p>For a local fun, <c><anno>Item</anno></c> can also be any of the atoms <c>index</c>, <c>new_index</c>, <c>new_uniq</c>, <c>uniq</c>, and <c>pid</c>. For an external fun, the value of any of these items is always the atom <c>undefined</c>.</p> @@ -1233,33 +1067,26 @@ true </desc> </func> <func> - <name>erlang:fun_to_list(Fun) -> string()</name> + <name name="fun_to_list" arity="1"/> <fsummary>Text representation of a fun</fsummary> - <type> - <v>Fun = fun()</v> - </type> <desc> <p>Returns a string which corresponds to the text - representation of <c>Fun</c>.</p> + representation of <c><anno>Fun</anno></c>.</p> </desc> </func> <func> - <name>erlang:function_exported(Module, Function, Arity) -> boolean()</name> + <name name="function_exported" arity="3"/> <fsummary>Check if a function is exported and loaded</fsummary> - <type> - <v>Module = Function = atom()</v> - <v>Arity = arity()</v> - </type> <desc> - <p>Returns <c>true</c> if the module <c>Module</c> is loaded - and contains an exported function <c>Function/Arity</c>; + <p>Returns <c>true</c> if the module <c><anno>Module</anno></c> is loaded + and contains an exported function <c><anno>Function</anno>/<anno>Arity</anno></c>; otherwise <c>false</c>.</p> <p>Returns <c>false</c> for any BIF (functions implemented in C rather than in Erlang).</p> </desc> </func> <func> - <name>garbage_collect() -> true</name> + <name name="garbage_collect" arity="0"/> <fsummary>Force an immediate garbage collection of the calling process</fsummary> <desc> <p>Forces an immediate garbage collection of the currently @@ -1276,26 +1103,20 @@ true </desc> </func> <func> - <name>garbage_collect(Pid) -> boolean()</name> + <name name="garbage_collect" arity="1"/> <fsummary>Force an immediate garbage collection of a process</fsummary> - <type> - <v>Pid = pid()</v> - </type> <desc> <p>Works like <c>erlang:garbage_collect()</c> but on any process. The same caveats apply. Returns <c>false</c> if - <c>Pid</c> refers to a dead process; <c>true</c> otherwise.</p> + <c><anno>Pid</anno></c> refers to a dead process; <c>true</c> otherwise.</p> </desc> </func> <func> - <name>get() -> [{Key, Val}]</name> + <name name="get" arity="0"/> <fsummary>Return the process dictionary</fsummary> - <type> - <v>Key = Val = term()</v> - </type> <desc> <p>Returns the process dictionary as a list of - <c>{Key, Val}</c> tuples.</p> + <c>{<anno>Key</anno>, <anno>Val</anno>}</c> tuples.</p> <pre> > <input>put(key1, merry),</input> <input>put(key2, lambs),</input> @@ -1305,14 +1126,11 @@ true </desc> </func> <func> - <name>get(Key) -> Val | undefined</name> + <name name="get" arity="1"/> <fsummary>Return a value from the process dictionary</fsummary> - <type> - <v>Key = Val = term()</v> - </type> <desc> - <p>Returns the value <c>Val</c>associated with <c>Key</c> in - the process dictionary, or <c>undefined</c> if <c>Key</c> + <p>Returns the value <c><anno>Val</anno></c>associated with <c><anno>Key</anno></c> in + the process dictionary, or <c>undefined</c> if <c><anno>Key</anno></c> does not exist.</p> <pre> > <input>put(key1, merry),</input> @@ -1331,14 +1149,11 @@ true </desc> </func> <func> - <name>get_keys(Val) -> [Key]</name> + <name name="get_keys" arity="1"/> <fsummary>Return a list of keys from the process dictionary</fsummary> - <type> - <v>Val = Key = term()</v> - </type> <desc> <p>Returns a list of keys which are associated with the value - <c>Val</c> in the process dictionary.</p> + <c><anno>Val</anno></c> in the process dictionary.</p> <pre> > <input>put(mary, {1, 2}),</input> <input>put(had, {1, 2}),</input> @@ -1351,28 +1166,23 @@ true </desc> </func> <func> - <name>erlang:get_stacktrace() -> [{Module, Function, Arity | Args, Location}]</name> + <name name="get_stacktrace" arity="0"/> <fsummary>Get the call stack back-trace of the last exception</fsummary> - <type> - <v>Module = Function = atom()</v> - <v>Arity = arity()</v> - <v>Args = [term()]</v> - <v>Location = [{atom(),term()}]</v> - </type> + <type name="stack_item"/> <desc> <p>Get the call stack back-trace (<em>stacktrace</em>) of the last exception in the calling process as a list of - <c>{Module,Function,Arity,Location}</c> tuples. - The <c>Arity</c> field in the first tuple may be the argument + <c>{<anno>Module</anno>,<anno>Function</anno>,<anno>Arity</anno>,<anno>Location</anno>}</c> tuples. + The <c><anno>Arity</anno></c> field in the first tuple may be the argument list of that function call instead of an arity integer, depending on the exception.</p> <p>If there has not been any exceptions in a process, the - stacktrace is []. After a code change for the process, + stacktrace is <c>[]</c>. After a code change for the process, the stacktrace may also be reset to [].</p> <p>The stacktrace is the same data as the <c>catch</c> operator returns, for example:</p> <p><c>{'EXIT',{badarg,Stacktrace}} = catch abs(x)</c></p> - <p><c>Location</c> is a (possibly empty) list of two-tuples that + <p><c><anno>Location</anno></c> is a (possibly empty) list of two-tuples that may indicate the location in the source code of the function. The first element is an atom that describes the type of information in the second element. Currently the following @@ -1397,11 +1207,8 @@ true </desc> </func> <func> - <name>group_leader() -> GroupLeader</name> + <name name="group_leader" arity="0"/> <fsummary>Get the group leader for the calling process</fsummary> - <type> - <v>GroupLeader = pid()</v> - </type> <desc> <p>Returns the pid of the group leader for the process which evaluates the function.</p> @@ -1414,13 +1221,10 @@ true </desc> </func> <func> - <name>group_leader(GroupLeader, Pid) -> true</name> + <name name="group_leader" arity="2"/> <fsummary>Set the group leader for a process</fsummary> - <type> - <v>GroupLeader = Pid = pid()</v> - </type> <desc> - <p>Sets the group leader of <c>Pid</c> to <c>GroupLeader</c>. + <p>Sets the group leader of <c><anno>Pid</anno></c> to <c><anno>GroupLeader</anno></c>. Typically, this is used when a processes started from a certain shell should have another group leader than <c>init</c>.</p> @@ -1429,7 +1233,7 @@ true </desc> </func> <func> - <name>halt()</name> + <name name="halt" arity="0"/> <fsummary>Halt the Erlang runtime system and indicate normal exit to the calling environment</fsummary> <desc> <p>The same as @@ -1440,14 +1244,11 @@ os_prompt% </pre> </desc> </func> <func> - <name>halt(Status)</name> + <name name="halt" arity="1"/> <fsummary>Halt the Erlang runtime system</fsummary> - <type> - <v>Status = integer() >= 0 | string() | abort</v> - </type> <desc> <p>The same as - <seealso marker="#halt/2"><c>halt(Status, [])</c></seealso>.</p> + <seealso marker="#halt/2"><c>halt(<anno>Status</anno>, [])</c></seealso>.</p> <pre> > <input>halt(17).</input> os_prompt% <input>echo $?</input> @@ -1456,26 +1257,21 @@ os_prompt% </pre> </desc> </func> <func> - <name>halt(Status, Options)</name> + <name name="halt" arity="2"/> <fsummary>Halt the Erlang runtime system</fsummary> - <type> - <v>Status = integer() >= 0 | string() | abort</v> - <v>Options = [Option]</v> - <v>Option = {flush,boolean()} | term()</v> - </type> <desc> - <p><c>Status</c> must be a non-negative integer, a string, + <p><c><anno>Status</anno></c> must be a non-negative integer, a string, or the atom <c>abort</c>. Halts the Erlang runtime system. Has no return value. - Depending on <c>Status</c>: + Depending on <c><anno>Status</anno></c>: </p> <taglist> <tag>integer()</tag> - <item>The runtime system exits with the integer value <c>Status</c> + <item>The runtime system exits with the integer value <c><anno>Status</anno></c> as status code to the calling environment (operating system). </item> <tag>string()</tag> - <item>An erlang crash dump is produced with <c>Status</c> as slogan, + <item>An erlang crash dump is produced with <c><anno>Status</anno></c> as slogan, and then the runtime system exits with status code <c>1</c>. </item> <tag><c>abort</c></tag> @@ -1487,10 +1283,10 @@ os_prompt% </pre> <p>Note that on many platforms, only the status codes 0-255 are supported by the operating system. </p> - <p>For integer <c>Status</c> the Erlang runtime system closes all ports + <p>For integer <c><anno>Status</anno></c> the Erlang runtime system closes all ports and allows async threads to finish their operations before exiting. To exit without such flushing use - <c>Option</c> as <c>{flush,false}</c>. + <c><anno>Option</anno></c> as <c>{flush,false}</c>. </p> <p>For statuses <c>string()</c> and <c>abort</c> the <c>flush</c> option is ignored and flushing is <em>not</em> done. @@ -1498,11 +1294,11 @@ os_prompt% </pre> </desc> </func> <func> - <name>erlang:hash(Term, Range) -> Hash</name> + <name name="hash" arity="2"/> <fsummary>Hash function (deprecated)</fsummary> <desc> - <p>Returns a hash value for <c>Term</c> within the range - <c>1..Range</c>. The allowed range is 1..2^27-1.</p> + <p>Returns a hash value for <c><anno>Term</anno></c> within the range + <c>1..<anno>Range</anno></c>. The allowed range is 1..2^27-1.</p> <warning> <p>This BIF is deprecated as the hash value may differ on different architectures. Also the hash values for integer @@ -1515,35 +1311,28 @@ os_prompt% </pre> </desc> </func> <func> - <name>hd(List) -> term()</name> + <name name="hd" arity="1"/> <fsummary>Head of a list</fsummary> - <type> - <v>List = [term()]</v> - </type> <desc> - <p>Returns the head of <c>List</c>, that is, the first element.</p> + <p>Returns the head of <c><anno>List</anno></c>, that is, the first element.</p> <pre> > <input>hd([1,2,3,4,5]).</input> 1</pre> <p>Allowed in guard tests.</p> - <p>Failure: <c>badarg</c> if <c>List</c> is the empty list [].</p> + <p>Failure: <c>badarg</c> if <c><anno>List</anno></c> is the empty list [].</p> </desc> </func> <func> - <name>erlang:hibernate(Module, Function, Args)</name> + <name name="hibernate" arity="3"/> <fsummary>Hibernate a process until a message is sent to it</fsummary> - <type> - <v>Module = Function = atom()</v> - <v>Args = [term()]</v> - </type> <desc> <p>Puts the calling process into a wait state where its memory allocation has been reduced as much as possible, which is useful if the process does not expect to receive any messages in the near future.</p> <p>The process will be awaken when a message is sent to it, and - control will resume in <c>Module:Function</c> with - the arguments given by <c>Args</c> with the call stack + control will resume in <c><anno>Module</anno>:<anno>Function</anno></c> with + the arguments given by <c><anno>Args</anno></c> with the call stack emptied, meaning that the process will terminate when that function returns. Thus <c>erlang:hibernate/3</c> will never return to its caller.</p> @@ -1573,14 +1362,11 @@ os_prompt% </pre> </desc> </func> <func> - <name>integer_to_list(Integer) -> string()</name> + <name name="integer_to_list" arity="1"/> <fsummary>Text representation of an integer</fsummary> - <type> - <v>Integer = integer()</v> - </type> <desc> <p>Returns a string which corresponds to the text - representation of <c>Integer</c>.</p> + representation of <c><anno>Integer</anno></c>.</p> <pre> > <input>integer_to_list(77).</input> "77"</pre> @@ -1598,14 +1384,11 @@ os_prompt% </pre> </desc> </func> <func> - <name>iolist_to_binary(IoListOrBinary) -> binary()</name> + <name name="iolist_to_binary" arity="1"/> <fsummary>Convert an iolist to a binary</fsummary> - <type> - <v>IoListOrBinary = iolist() | binary()</v> - </type> <desc> <p>Returns a binary which is made from the integers and - binaries in <c>IoListOrBinary</c>.</p> + binaries in <c><anno>IoListOrBinary</anno></c>.</p> <pre> > <input>Bin1 = <<1,2,3>>.</input> <<1,2,3>> @@ -1618,22 +1401,19 @@ os_prompt% </pre> </desc> </func> <func> - <name>iolist_size(Item) -> integer() >= 0</name> + <name name="iolist_size" arity="1"/> <fsummary>Size of an iolist</fsummary> - <type> - <v>Item = iolist() | binary()</v> - </type> <desc> <p>Returns an integer which is the size in bytes of the binary that would be the result of - <c>iolist_to_binary(Item)</c>.</p> + <c>iolist_to_binary(<anno>Item</anno>)</c>.</p> <pre> > <input>iolist_size([1,2|<<3,4>>]).</input> 4</pre> </desc> </func> <func> - <name>is_alive() -> boolean()</name> + <name name="is_alive" arity="0"/> <fsummary>Check whether the local node is alive</fsummary> <desc> <p>Returns <c>true</c> if the local node is alive; that is, if @@ -1642,25 +1422,19 @@ os_prompt% </pre> </desc> </func> <func> - <name>is_atom(Term) -> boolean()</name> + <name name="is_atom" arity="1"/> <fsummary>Check whether a term is an atom</fsummary> - <type> - <v>Term = term()</v> - </type> <desc> - <p>Returns <c>true</c> if <c>Term</c> is an atom; + <p>Returns <c>true</c> if <c><anno>Term</anno></c> is an atom; otherwise returns <c>false</c>.</p> <p>Allowed in guard tests.</p> </desc> </func> <func> - <name>is_binary(Term) -> boolean()</name> + <name name="is_binary" arity="1"/> <fsummary>Check whether a term is a binary</fsummary> - <type> - <v>Term = term()</v> - </type> <desc> - <p>Returns <c>true</c> if <c>Term</c> is a binary; + <p>Returns <c>true</c> if <c><anno>Term</anno></c> is a binary; otherwise returns <c>false</c>.</p> <p>A binary always contains a complete number of bytes.</p> @@ -1669,78 +1443,58 @@ os_prompt% </pre> </desc> </func> <func> - <name>is_bitstring(Term) -> boolean()</name> + <name name="is_bitstring" arity="1"/> <fsummary>Check whether a term is a bitstring</fsummary> - <type> - <v>Term = term()</v> - </type> <desc> - <p>Returns <c>true</c> if <c>Term</c> is a bitstring (including a binary); + <p>Returns <c>true</c> if <c><anno>Term</anno></c> is a bitstring (including a binary); otherwise returns <c>false</c>.</p> <p>Allowed in guard tests.</p> </desc> </func> <func> - <name>is_boolean(Term) -> boolean()</name> + <name name="is_boolean" arity="1"/> <fsummary>Check whether a term is a boolean</fsummary> - <type> - <v>Term = term()</v> - </type> <desc> - <p>Returns <c>true</c> if <c>Term</c> is + <p>Returns <c>true</c> if <c><anno>Term</anno></c> is either the atom <c>true</c> or the atom <c>false</c> (i.e. a boolean); otherwise returns <c>false</c>.</p> <p>Allowed in guard tests.</p> </desc> </func> <func> - <name>erlang:is_builtin(Module, Function, Arity) -> boolean()</name> + <name name="is_builtin" arity="3"/> <fsummary>Check if a function is a BIF implemented in C</fsummary> - <type> - <v>Module = Function = atom()</v> - <v>Arity = arity()</v> - </type> <desc> - <p>Returns <c>true</c> if <c>Module:Function/Arity</c> is + <p>Returns <c>true</c> if <c><anno>Module</anno>:<anno>Function</anno>/<anno>Arity</anno></c> is a BIF implemented in C; otherwise returns <c>false</c>. This BIF is useful for builders of cross reference tools.</p> </desc> </func> <func> - <name>is_float(Term) -> boolean()</name> + <name name="is_float" arity="1"/> <fsummary>Check whether a term is a float</fsummary> - <type> - <v>Term = term()</v> - </type> <desc> - <p>Returns <c>true</c> if <c>Term</c> is a floating point + <p>Returns <c>true</c> if <c><anno>Term</anno></c> is a floating point number; otherwise returns <c>false</c>.</p> <p>Allowed in guard tests.</p> </desc> </func> <func> - <name>is_function(Term) -> boolean()</name> + <name name="is_function" arity="1"/> <fsummary>Check whether a term is a fun</fsummary> - <type> - <v>Term = term()</v> - </type> <desc> - <p>Returns <c>true</c> if <c>Term</c> is a fun; otherwise + <p>Returns <c>true</c> if <c><anno>Term</anno></c> is a fun; otherwise returns <c>false</c>.</p> <p>Allowed in guard tests.</p> </desc> </func> <func> - <name>is_function(Term, Arity) -> boolean()</name> + <name name="is_function" arity="2"/> <fsummary>Check whether a term is a fun with a given arity</fsummary> - <type> - <v>Term = term()</v> - <v>Arity = arity()</v> - </type> <desc> - <p>Returns <c>true</c> if <c>Term</c> is a fun that can be - applied with <c>Arity</c> number of arguments; otherwise + <p>Returns <c>true</c> if <c><anno>Term</anno></c> is a fun that can be + applied with <c><anno>Arity</anno></c> number of arguments; otherwise returns <c>false</c>.</p> <p>Allowed in guard tests.</p> <warning> @@ -1753,74 +1507,56 @@ os_prompt% </pre> </desc> </func> <func> - <name>is_integer(Term) -> boolean()</name> + <name name="is_integer" arity="1"/> <fsummary>Check whether a term is an integer</fsummary> - <type> - <v>Term = term()</v> - </type> <desc> - <p>Returns <c>true</c> if <c>Term</c> is an integer; + <p>Returns <c>true</c> if <c><anno>Term</anno></c> is an integer; otherwise returns <c>false</c>.</p> <p>Allowed in guard tests.</p> </desc> </func> <func> - <name>is_list(Term) -> boolean()</name> + <name name="is_list" arity="1"/> <fsummary>Check whether a term is a list</fsummary> - <type> - <v>Term = term()</v> - </type> <desc> - <p>Returns <c>true</c> if <c>Term</c> is a list with + <p>Returns <c>true</c> if <c><anno>Term</anno></c> is a list with zero or more elements; otherwise returns <c>false</c>.</p> <p>Allowed in guard tests.</p> </desc> </func> <func> - <name>is_number(Term) -> boolean()</name> + <name name="is_number" arity="1"/> <fsummary>Check whether a term is a number</fsummary> - <type> - <v>Term = term()</v> - </type> <desc> - <p>Returns <c>true</c> if <c>Term</c> is either an integer or a + <p>Returns <c>true</c> if <c><anno>Term</anno></c> is either an integer or a floating point number; otherwise returns <c>false</c>.</p> <p>Allowed in guard tests.</p> </desc> </func> <func> - <name>is_pid(Term) -> boolean()</name> + <name name="is_pid" arity="1"/> <fsummary>Check whether a term is a pid</fsummary> - <type> - <v>Term = term()</v> - </type> <desc> - <p>Returns <c>true</c> if <c>Term</c> is a pid (process + <p>Returns <c>true</c> if <c><anno>Term</anno></c> is a pid (process identifier); otherwise returns <c>false</c>.</p> <p>Allowed in guard tests.</p> </desc> </func> <func> - <name>is_port(Term) -> boolean()</name> + <name name="is_port" arity="1"/> <fsummary>Check whether a term is a port</fsummary> - <type> - <v>Term = term()</v> - </type> <desc> - <p>Returns <c>true</c> if <c>Term</c> is a port identifier; + <p>Returns <c>true</c> if <c><anno>Term</anno></c> is a port identifier; otherwise returns <c>false</c>.</p> <p>Allowed in guard tests.</p> </desc> </func> <func> - <name>is_process_alive(Pid) -> boolean()</name> + <name name="is_process_alive" arity="1"/> <fsummary>Check whether a process is alive</fsummary> - <type> - <v>Pid = pid()</v> - </type> <desc> <p> - <c>Pid</c> must refer to a process at the local node. + <c><anno>Pid</anno></c> must refer to a process at the local node. Returns <c>true</c> if the process exists and is alive, that is, is not exiting and has not exited. Otherwise, returns <c>false</c>. @@ -1828,41 +1564,32 @@ os_prompt% </pre> </desc> </func> <func> - <name>is_record(Term, RecordTag) -> boolean()</name> + <name name="is_record" arity="2"/> <fsummary>Check whether a term appears to be a record</fsummary> - <type> - <v>Term = term()</v> - <v>RecordTag = atom()</v> - </type> <desc> - <p>Returns <c>true</c> if <c>Term</c> is a tuple and its first - element is <c>RecordTag</c>. Otherwise, returns <c>false</c>.</p> + <p>Returns <c>true</c> if <c><anno>Term</anno></c> is a tuple and its first + element is <c><anno>RecordTag</anno></c>. Otherwise, returns <c>false</c>.</p> <note> <p>Normally the compiler treats calls to <c>is_record/2</c> - specially. It emits code to verify that <c>Term</c> is a - tuple, that its first element is <c>RecordTag</c>, and that - the size is correct. However, if the <c>RecordTag</c> is + specially. It emits code to verify that <c><anno>Term</anno></c> is a + tuple, that its first element is <c><anno>RecordTag</anno></c>, and that + the size is correct. However, if the <c><anno>RecordTag</anno></c> is not a literal atom, the <c>is_record/2</c> BIF will be called instead and the size of the tuple will not be verified.</p> </note> - <p>Allowed in guard tests, if <c>RecordTag</c> is a literal + <p>Allowed in guard tests, if <c><anno>RecordTag</anno></c> is a literal atom.</p> </desc> </func> <func> - <name>is_record(Term, RecordTag, Size) -> boolean()</name> + <name name="is_record" arity="3"/> <fsummary>Check whether a term appears to be a record</fsummary> - <type> - <v>Term = term()</v> - <v>RecordTag = atom()</v> - <v>Size = integer()</v> - </type> - <desc> - <p><c>RecordTag</c> must be an atom. Returns <c>true</c> if - <c>Term</c> is a tuple, its first element is <c>RecordTag</c>, - and its size is <c>Size</c>. Otherwise, returns <c>false</c>.</p> - <p>Allowed in guard tests, provided that <c>RecordTag</c> is + <desc> + <p><c><anno>RecordTag</anno></c> must be an atom. Returns <c>true</c> if + <c><anno>Term</anno></c> is a tuple, its first element is <c><anno>RecordTag</anno></c>, + and its size is <c><anno>Size</anno></c>. Otherwise, returns <c>false</c>.</p> + <p>Allowed in guard tests, provided that <c><anno>RecordTag</anno></c> is a literal atom and <c>Size</c> is a literal integer.</p> <note> <p>This BIF is documented for completeness. In most cases @@ -1871,37 +1598,28 @@ os_prompt% </pre> </desc> </func> <func> - <name>is_reference(Term) -> boolean()</name> + <name name="is_reference" arity="1"/> <fsummary>Check whether a term is a reference</fsummary> - <type> - <v>Term = term()</v> - </type> <desc> - <p>Returns <c>true</c> if <c>Term</c> is a reference; + <p>Returns <c>true</c> if <c><anno>Term</anno></c> is a reference; otherwise returns <c>false</c>.</p> <p>Allowed in guard tests.</p> </desc> </func> <func> - <name>is_tuple(Term) -> boolean()</name> + <name name="is_tuple" arity="1"/> <fsummary>Check whether a term is a tuple</fsummary> - <type> - <v>Term = term()</v> - </type> <desc> - <p>Returns <c>true</c> if <c>Term</c> is a tuple; + <p>Returns <c>true</c> if <c><anno>Term</anno></c> is a tuple; otherwise returns <c>false</c>.</p> <p>Allowed in guard tests.</p> </desc> </func> <func> - <name>length(List) -> integer() >= 0</name> + <name name="length" arity="1"/> <fsummary>Length of a list</fsummary> - <type> - <v>List = [term()]</v> - </type> <desc> - <p>Returns the length of <c>List</c>.</p> + <p>Returns the length of <c><anno>List</anno></c>.</p> <pre> > <input>length([1,2,3,4,5,6,7,8,9]).</input> 9</pre> @@ -1909,52 +1627,47 @@ os_prompt% </pre> </desc> </func> <func> - <name>link(Pid) -> true</name> + <name name="link" arity="1"/> <fsummary>Create a link to another process (or port)</fsummary> - <type> - <v>Pid = pid() | port()</v> - </type> <desc> <p>Creates a link between the calling process and another - process (or port) <c>Pid</c>, if there is not such a link + process (or port) <c><anno>PidOrPort</anno></c>, if there is not such a link already. If a process attempts to create a link to itself, nothing is done. Returns <c>true</c>.</p> - <p>If <c>Pid</c> does not exist, the behavior of the BIF depends + <p>If <c><anno>PidOrPort</anno></c> does not exist, the behavior of the BIF depends on if the calling process is trapping exits or not (see <seealso marker="#process_flag/2">process_flag/2</seealso>):</p> <list type="bulleted"> <item>If the calling process is not trapping exits, and - checking <c>Pid</c> is cheap -- that is, if <c>Pid</c> is + checking <c><anno>PidOrPort</anno></c> is cheap -- that is, if <c><anno>PidOrPort</anno></c> is local -- <c>link/1</c> fails with reason <c>noproc</c>.</item> <item>Otherwise, if the calling process is trapping exits, - and/or <c>Pid</c> is remote, <c>link/1</c> returns + and/or <c><anno>PidOrPort</anno></c> is remote, <c>link/1</c> returns <c>true</c>, but an exit signal with reason <c>noproc</c> is sent to the calling process.</item> </list> </desc> </func> <func> - <name>list_to_atom(String) -> atom()</name> + <name name="list_to_atom" arity="1"/> <fsummary>Convert from text representation to an atom</fsummary> - <type> - <v>String = string()</v> - </type> <desc> - <p>Returns the atom whose text representation is <c>String</c>.</p> + <p>Returns the atom whose text representation is <c><anno>String</anno></c>.</p> + <p><c><anno>String</anno></c> may only contain ISO-latin-1 + characterns (i.e. numbers below 256) as the current + implementation does not allow unicode characters >= 256 in + atoms.</p> <pre> > <input>list_to_atom("Erlang").</input> 'Erlang'</pre> </desc> </func> <func> - <name>list_to_binary(IoList) -> binary()</name> + <name name="list_to_binary" arity="1"/> <fsummary>Convert a list to a binary</fsummary> - <type> - <v>IoList = iolist()</v> - </type> <desc> <p>Returns a binary which is made from the integers and - binaries in <c>IoList</c>.</p> + binaries in <c><anno>IoList</anno></c>.</p> <pre> > <input>Bin1 = <<1,2,3>>.</input> <<1,2,3>> @@ -1967,14 +1680,12 @@ os_prompt% </pre> </desc> </func> <func> - <name>list_to_bitstring(BitstringList) -> bitstring()</name> + <name name="list_to_bitstring" arity="1"/> + <type name="bitstring_list"/> <fsummary>Convert a list to a bitstring</fsummary> - <type> - <v>BitstringList = [BitstringList | bitstring() | char()]</v> - </type> <desc> <p>Returns a bitstring which is made from the integers and - bitstrings in <c>BitstringList</c>. (The last tail in <c>BitstringList</c> + bitstrings in <c><anno>BitstringList</anno></c>. (The last tail in <c><anno>BitstringList</anno></c> is allowed to be a bitstring.)</p> <pre> > <input>Bin1 = <<1,2,3>>.</input> @@ -1983,51 +1694,42 @@ os_prompt% </pre> <<4,5>> > <input>Bin3 = <<6,7:4,>>.</input> <<6>> -> <input>list_to_binary([Bin1,1,[2,3,Bin2],4|Bin3]).</input> +> <input>list_to_bitstring([Bin1,1,[2,3,Bin2],4|Bin3]).</input> <<1,2,3,1,2,3,4,5,4,6,7:46>></pre> </desc> </func> <func> - <name>list_to_existing_atom(String) -> atom()</name> + <name name="list_to_existing_atom" arity="1"/> <fsummary>Convert from text representation to an atom</fsummary> - <type> - <v>String = string()</v> - </type> <desc> - <p>Returns the atom whose text representation is <c>String</c>, + <p>Returns the atom whose text representation is <c><anno>String</anno></c>, but only if there already exists such atom.</p> <p>Failure: <c>badarg</c> if there does not already exist an atom - whose text representation is <c>String</c>.</p> + whose text representation is <c><anno>String</anno></c>.</p> </desc> </func> <func> - <name>list_to_float(String) -> float()</name> + <name name="list_to_float" arity="1"/> <fsummary>Convert from text representation to a float</fsummary> - <type> - <v>String = string()</v> - </type> <desc> - <p>Returns the float whose text representation is <c>String</c>.</p> + <p>Returns the float whose text representation is <c><anno>String</anno></c>.</p> <pre> > <input>list_to_float("2.2017764e+0").</input> 2.2017764</pre> - <p>Failure: <c>badarg</c> if <c>String</c> contains a bad + <p>Failure: <c>badarg</c> if <c><anno>String</anno></c> contains a bad representation of a float.</p> </desc> </func> <func> - <name>list_to_integer(String) -> integer()</name> + <name name="list_to_integer" arity="1"/> <fsummary>Convert from text representation to an integer</fsummary> - <type> - <v>String = string()</v> - </type> <desc> <p>Returns an integer whose text representation is - <c>String</c>.</p> + <c><anno>String</anno></c>.</p> <pre> > <input>list_to_integer("123").</input> 123</pre> - <p>Failure: <c>badarg</c> if <c>String</c> contains a bad + <p>Failure: <c>badarg</c> if <c><anno>String</anno></c> contains a bad representation of an integer.</p> </desc> </func> @@ -2045,13 +1747,10 @@ os_prompt% </pre> </desc> </func> <func> - <name>list_to_pid(String) -> pid()</name> + <name name="list_to_pid" arity="1"/> <fsummary>Convert from text representation to a pid</fsummary> - <type> - <v>String = string()</v> - </type> <desc> - <p>Returns a pid whose text representation is <c>String</c>.</p> + <p>Returns a pid whose text representation is <c><anno>String</anno></c>.</p> <warning> <p>This BIF is intended for debugging and for use in the Erlang operating system. It should not be used in @@ -2060,18 +1759,15 @@ os_prompt% </pre> <pre> > <input>list_to_pid("<0.4.1>").</input> <0.4.1></pre> - <p>Failure: <c>badarg</c> if <c>String</c> contains a bad + <p>Failure: <c>badarg</c> if <c><anno>String</anno></c> contains a bad representation of a pid.</p> </desc> </func> <func> - <name>list_to_tuple(List) -> tuple()</name> + <name name="list_to_tuple" arity="1"/> <fsummary>Convert a list to a tuple</fsummary> - <type> - <v>List = [term()]</v> - </type> <desc> - <p>Returns a tuple which corresponds to <c>List</c>. <c>List</c> + <p>Returns a tuple which corresponds to <c><anno>List</anno></c>. <c><anno>List</anno></c> can contain any Erlang terms.</p> <pre> > <input>list_to_tuple([share, ['Ericsson_B', 163]]).</input> @@ -2079,38 +1775,30 @@ os_prompt% </pre> </desc> </func> <func> - <name>load_module(Module, Binary) -> {module, Module} | {error, Reason}</name> + <name name="load_module" arity="2"/> <fsummary>Load object code for a module</fsummary> - <type> - <v>Module = atom()</v> - <v>Binary = binary()</v> - <v>Reason = badfile | not_purged | badfile</v> - </type> - <desc> - <p>If <c>Binary</c> contains the object code for the module - <c>Module</c>, this BIF loads that object code. Also, if - the code for the module <c>Module</c> already exists, all + <desc> + <p>If <c><anno>Binary</anno></c> contains the object code for the module + <c><anno>Module</anno></c>, this BIF loads that object code. Also, if + the code for the module <c><anno>Module</anno></c> already exists, all export references are replaced so they point to the newly loaded code. The previously loaded code is kept in the system as old code, as there may still be processes which are executing that code. It returns either - <c>{module, Module}</c>, or <c>{error, Reason}</c> if loading - fails. <c>Reason</c> is one of the following:</p> + <c>{module, <anno>Module</anno>}</c>, or <c>{error, <anno>Reason</anno>}</c> if loading + fails. <c><anno>Reason</anno></c> is one of the following:</p> <taglist> <tag><c>badfile</c></tag> <item> - <p>The object code in <c>Binary</c> has an incorrect format.</p> + <p>The object code in <c><anno>Binary</anno></c> has an + incorrect format <em>or</em> the object code contains code + for another module than <c><anno>Module</anno></c>.</p> </item> <tag><c>not_purged</c></tag> <item> - <p><c>Binary</c> contains a module which cannot be loaded + <p><c><anno>Binary</anno></c> contains a module which cannot be loaded because old code for this module already exists.</p> </item> - <tag><c>badfile</c></tag> - <item> - <p>The object code contains code for another module than - <c>Module</c></p> - </item> </taglist> <warning> <p>This BIF is intended for the code server (see @@ -2120,15 +1808,8 @@ os_prompt% </pre> </desc> </func> <func> - <name>erlang:load_nif(Path, LoadInfo) -> ok | {error, {Reason, Text}}</name> + <name name="load_nif" arity="2"/> <fsummary>Load NIF library</fsummary> - <type> - <v>Path = string()</v> - <v>LoadInfo = term()</v> - <v>Reason = load_failed | bad_lib | load | reload | - upgrade | old_code</v> - <v>Text = string()</v> - </type> <desc> <note> <p>In releases older than OTP R14B, NIFs were an @@ -2139,21 +1820,21 @@ os_prompt% </pre> <c>{error,Reason,Text}</c>.</p> </note> <p>Loads and links a dynamic library containing native - implemented functions (NIFs) for a module. <c>Path</c> is a + implemented functions (NIFs) for a module. <c><anno>Path</anno></c> is a file path to the sharable object/dynamic library file minus the OS-dependent file extension (.so for Unix and .dll for Windows). See <seealso marker="erl_nif">erl_nif</seealso> on how to implement a NIF library.</p> - <p><c>LoadInfo</c> can be any term. It will be passed on to + <p><c><anno>LoadInfo</anno></c> can be any term. It will be passed on to the library as part of the initialization. A good practice is to include a module version number to support future code upgrade scenarios.</p> <p>The call to <c>load_nif/2</c> must be made <em>directly</em> from the Erlang code of the module that the NIF library belongs to.</p> - <p>It returns either <c>ok</c>, or <c>{error,{Reason,Text}}</c> - if loading fails. <c>Reason</c> is one of the atoms below, - while <c>Text</c> is a human readable string that may give + <p>It returns either <c>ok</c>, or <c>{error,{<anno>Reason</anno>,Text}}</c> + if loading fails. <c><anno>Reason</anno></c> is one of the atoms below, + while <c><anno>Text</anno></c> is a human readable string that may give some more information about the failure.</p> <taglist> <tag><c>load_failed</c></tag> @@ -2179,11 +1860,8 @@ os_prompt% </pre> </desc> </func> <func> - <name>erlang:loaded() -> [Module]</name> + <name name="loaded" arity="0"/> <fsummary>List of all loaded modules</fsummary> - <type> - <v>Module = atom()</v> - </type> <desc> <p>Returns a list of all loaded Erlang modules (current and/or old code), including preloaded modules.</p> @@ -2191,11 +1869,8 @@ os_prompt% </pre> </desc> </func> <func> - <name>erlang:localtime() -> DateTime</name> + <name name="localtime" arity="0"/> <fsummary>Current local date and time</fsummary> - <type> - <v>DateTime = <seealso marker="calendar#type-datetime">calendar:datetime()</seealso></v> - </type> <desc> <p>Returns the current local date and time <c>{{Year, Month, Day}, {Hour, Minute, Second}}</c>.</p> @@ -2212,32 +1887,27 @@ os_prompt% </pre> <desc> <p>Converts local date and time to Universal Time Coordinated (UTC), if this is supported by the underlying OS. Otherwise, - no conversion is done and <c>{<anno>Date1</anno>, <anno>Time1</anno>}</c> is returned.</p> + no conversion is done and <c><anno>Localtime</anno></c> is returned.</p> <pre> > <input>erlang:localtime_to_universaltime({{1996,11,6},{14,45,17}}).</input> {{1996,11,6},{13,45,17}}</pre> - <p>Failure: <c>badarg</c> if <c>Date1</c> or <c>Time1</c> do - not denote a valid date or time.</p> + <p>Failure: <c>badarg</c> if <c><anno>Localtime</anno></c> does not denote + a valid date and time.</p> </desc> </func> <func> - <name>erlang:localtime_to_universaltime({Date1, Time1}, IsDst) -> {Date2, Time2}</name> + <name name="localtime_to_universaltime" arity="2"/> <fsummary>Convert from local to Universal Time Coordinated (UTC) date and time</fsummary> - <type> - <v>Date1 = Date2 = <seealso marker="calendar#type-date">calendar:date()</seealso></v> - <v>Time1 = Time2 = <seealso marker="calendar#type-time">calendar:time()</seealso></v> - <v>IsDst = true | false | undefined</v> - </type> <desc> <p>Converts local date and time to Universal Time Coordinated (UTC) just like <c>erlang:localtime_to_universaltime/1</c>, but the caller decides if daylight saving time is active or not.</p> - <p>If <c>IsDst == true</c> the <c>{Date1, Time1}</c> is during - daylight saving time, if <c>IsDst == false</c> it is not, - and if <c>IsDst == undefined</c> the underlying OS may + <p>If <c><anno>IsDst</anno> == true</c> the <c><anno>Localtime</anno></c> is during + daylight saving time, if <c><anno>IsDst</anno> == false</c> it is not, + and if <c><anno>IsDst</anno> == undefined</c> the underlying OS may guess, which is the same as calling - <c>erlang:localtime_to_universaltime({Date1, Time1})</c>.</p> + <c>erlang:localtime_to_universaltime(<anno>Localtime</anno>)</c>.</p> <pre> > <input>erlang:localtime_to_universaltime({{1996,11,6},{14,45,17}}, true).</input> {{1996,11,6},{12,45,17}} @@ -2245,12 +1915,12 @@ os_prompt% </pre> {{1996,11,6},{13,45,17}} > <input>erlang:localtime_to_universaltime({{1996,11,6},{14,45,17}}, undefined).</input> {{1996,11,6},{13,45,17}}</pre> - <p>Failure: <c>badarg</c> if <c>Date1</c> or <c>Time1</c> do - not denote a valid date or time.</p> + <p>Failure: <c>badarg</c> if <c><anno>Localtime</anno></c> does not denote + a valid date and time.</p> </desc> </func> <func> - <name>make_ref() -> reference()</name> + <name name="make_ref" arity="0"/> <fsummary>Return an almost unique reference</fsummary> <desc> <p>Returns an almost unique reference.</p> @@ -2262,33 +1932,23 @@ os_prompt% </pre> </desc> </func> <func> - <name>erlang:make_tuple(Arity, InitialValue) -> tuple()</name> + <name name="make_tuple" arity="2"/> <fsummary>Create a new tuple of a given arity</fsummary> - <type> - <v>Arity = arity()</v> - <v>InitialValue = term()</v> - </type> <desc> - <p>Returns a new tuple of the given <c>Arity</c>, where all - elements are <c>InitialValue</c>.</p> + <p>Returns a new tuple of the given <c><anno>Arity</anno></c>, where all + elements are <c><anno>InitialValue</anno></c>.</p> <pre> > <input>erlang:make_tuple(4, []).</input> {[],[],[],[]}</pre> </desc> </func> <func> - <name>erlang:make_tuple(Arity, Default, InitList) -> tuple()</name> + <name name="make_tuple" arity="3"/> <fsummary>Create a new tuple with given arity and contents</fsummary> - <type> - <v>Arity = arity()</v> - <v>Default = term()</v> - <v>InitList = [{Position,term()}]</v> - <v>Position = integer()</v> - </type> - <desc> - <p><c>erlang:make_tuple</c> first creates a tuple of size <c>Arity</c> - where each element has the value <c>Default</c>. It then fills - in values from <c>InitList</c>. Each list element in <c>InitList</c> + <desc> + <p><c>erlang:make_tuple</c> first creates a tuple of size <c><anno>Arity</anno></c> + where each element has the value <c><anno>DefaultValue</anno></c>. It then fills + in values from <c><anno>InitList</anno></c>. Each list element in <c><anno>InitList</anno></c> must be a two-tuple where the first element is a position in the newly created tuple and the second element is any term. If a position occurs more than once in the list, the term corresponding to @@ -2307,15 +1967,11 @@ os_prompt% </pre> </desc> </func> <func> - <name>erlang:md5(Data) -> Digest</name> + <name name="md5" arity="1"/> <fsummary>Compute an MD5 message digest</fsummary> - <type> - <v>Data = iodata()</v> - <v>Digest = binary()</v> - </type> <desc> - <p>Computes an <c>MD5</c> message digest from <c>Data</c>, where - the length of the digest is 128 bits (16 bytes). <c>Data</c> + <p>Computes an <c>MD5</c> message digest from <c><anno>Data</anno></c>, where + the length of the digest is 128 bits (16 bytes). <c><anno>Data</anno></c> is a binary or a list of small integers and binaries.</p> <p>See The MD5 Message Digest Algorithm (RFC 1321) for more information about MD5.</p> @@ -2324,51 +1980,39 @@ os_prompt% </pre> </desc> </func> <func> - <name>erlang:md5_final(Context) -> Digest</name> + <name name="md5_final" arity="1"/> <fsummary>Finish the update of an MD5 context and return the computed MD5 message digest</fsummary> - <type> - <v>Context = Digest = binary()</v> - </type> <desc> - <p>Finishes the update of an MD5 <c>Context</c> and returns + <p>Finishes the update of an MD5 <c><anno>Context</anno></c> and returns the computed <c>MD5</c> message digest.</p> </desc> </func> <func> - <name>erlang:md5_init() -> Context</name> + <name name="md5_init" arity="0"/> <fsummary>Create an MD5 context</fsummary> - <type> - <v>Context = binary()</v> - </type> <desc> <p>Creates an MD5 context, to be used in subsequent calls to <c>md5_update/2</c>.</p> </desc> </func> <func> - <name>erlang:md5_update(Context, Data) -> NewContext</name> + <name name="md5_update" arity="2"/> <fsummary>Update an MD5 context with data, and return a new context</fsummary> - <type> - <v>Data = iodata()</v> - <v>Context = NewContext = binary()</v> - </type> <desc> - <p>Updates an MD5 <c>Context</c> with <c>Data</c>, and returns - a <c>NewContext</c>.</p> + <p>Updates an MD5 <c><anno>Context</anno></c> with <c><anno>Data</anno></c>, and returns + a <c><anno>NewContext</anno></c>.</p> </desc> </func> <func> - <name>erlang:memory() -> [{Type, Size}]</name> + <name name="memory" arity="0"/> + <type name="memory_type"/> <fsummary>Information about dynamically allocated memory</fsummary> - <type> - <v>Type, Size -- see below</v> - </type> <desc> <p>Returns a list containing information about memory dynamically allocated by the Erlang emulator. Each element of the list is a tuple <c>{Type, Size}</c>. The first element - <c>Type</c>is an atom describing memory type. The second - element <c>Size</c>is memory size in bytes. A description of + <c><anno>Type</anno></c>is an atom describing memory type. The second + element <c><anno>Size</anno></c>is memory size in bytes. A description of each memory type follows:</p> <taglist> <tag><c>total</c></tag> @@ -2430,6 +2074,14 @@ os_prompt% </pre> <p>This memory is part of the memory presented as <c>system</c> memory.</p> </item> + <tag><c>low</c></tag> + <item> + <p>Only on 64-bit halfword emulator.</p> + <p>The total amount of memory allocated in low memory areas + that are restricted to less than 4 Gb even though + the system may have more physical memory.</p> + <p>May be removed in future releases of halfword emulator.</p> + </item> <tag><c>maximum</c></tag> <item> <p>The maximum total amount of memory allocated since @@ -2441,14 +2093,6 @@ os_prompt% </pre> <seealso marker="tools:instrument">instrument(3)</seealso> and/or <seealso marker="erts:erl">erl(1)</seealso>.</p> </item> - <tag><c>low</c></tag> - <item> - <p>Only on 64-bit halfword emulator.</p> - <p>The total amount of memory allocated in low memory areas - that are restricted to less than 4 Gb even though - the system may have more physical memory.</p> - <p>May be removed in future releases of halfword emulator.</p> - </item> </taglist> <note> <p>The <c>system</c> value is not complete. Some allocated @@ -2512,16 +2156,15 @@ os_prompt% </pre> </desc> </func> <func> - <name>erlang:memory(Type | [Type]) -> Size | [{Type, Size}]</name> + <name name="memory" arity="1" clause_i="1"/> + <name name="memory" arity="1" clause_i="2"/> + <type name="memory_type"/> <fsummary>Information about dynamically allocated memory</fsummary> - <type> - <v>Type, Size -- see below</v> - </type> <desc> <p>Returns the memory size in bytes allocated for memory of - type <c>Type</c>. The argument can also be given as a list - of <c>Type</c> atoms, in which case a corresponding list of - <c>{Type, Size}</c> tuples is returned.</p> + type <c><anno>Type</anno></c>. The argument can also be given as a list + of <c>memory_type()</c> atoms, in which case a corresponding list of + <c>{memory_type(), Size :: integer >= 0}</c> tuples is returned.</p> <note> <p> Since erts version 5.6.4 <c>erlang:memory/1</c> requires that @@ -2533,13 +2176,13 @@ os_prompt% </pre> <taglist> <tag><c>badarg</c></tag> <item> - If <c>Type</c> is not one of the memory types listed in the + If <c><anno>Type</anno></c> is not one of the memory types listed in the documentation of <seealso marker="#memory/0">erlang:memory/0</seealso>. </item> <tag><c>badarg</c></tag> <item> - If <c>maximum</c> is passed as <c>Type</c> and the emulator + If <c>maximum</c> is passed as <c><anno>Type</anno></c> and the emulator is not run in instrumented mode. </item> <tag><c>notsup</c></tag> @@ -2561,13 +2204,10 @@ os_prompt% </pre> </desc> </func> <func> - <name>module_loaded(Module) -> boolean()</name> + <name name="module_loaded" arity="1"/> <fsummary>Check if a module is loaded</fsummary> - <type> - <v>Module = atom()</v> - </type> <desc> - <p>Returns <c>true</c> if the module <c>Module</c> is loaded, + <p>Returns <c>true</c> if the module <c><anno>Module</anno></c> is loaded, otherwise returns <c>false</c>. It does not attempt to load the module.</p> <warning> @@ -2578,22 +2218,15 @@ os_prompt% </pre> </desc> </func> <func> - <name>monitor(Type, Item) -> MonitorRef</name> + <name name="monitor" arity="2"/> <fsummary>Start monitoring</fsummary> - <type> - <v>Type = process</v> - <v>Item = pid() | {RegName, Node} | RegName</v> - <v> RegName = atom()</v> - <v> Node = node()</v> - <v>MonitorRef = reference()</v> - </type> - <desc> - <p>The calling process starts monitoring <c>Item</c> which is - an object of type <c>Type</c>.</p> + <desc> + <p>The calling process starts monitoring <c><anno>Item</anno></c> which is + an object of type <c><anno>Type</anno></c>.</p> <p>Currently only processes can be monitored, i.e. the only - allowed <c>Type</c> is <c>process</c>, but other types may be + allowed <c><anno>Type</anno></c> is <c>process</c>, but other types may be allowed in the future.</p> - <p><c>Item</c> can be:</p> + <p><c><anno>Item</anno></c> can be:</p> <taglist> <tag><c>pid()</c></tag> <item> @@ -2619,8 +2252,8 @@ os_prompt% </pre> unregistered.</p> </note> <p>A <c>'DOWN'</c> message will be sent to the monitoring - process if <c>Item</c> dies, if <c>Item</c> does not exist, - or if the connection is lost to the node which <c>Item</c> + process if <c><anno>Item</anno></c> dies, if <c><anno>Item</anno></c> does not exist, + or if the connection is lost to the node which <c><anno>Item</anno></c> resides on. A <c>'DOWN'</c> message has the following pattern:</p> <code type="none"> {'DOWN', MonitorRef, Type, Object, Info}</code> @@ -2631,11 +2264,11 @@ os_prompt% </pre> <item> <p>A reference to the monitored object:</p> <list type="bulleted"> - <item>the pid of the monitored process, if <c>Item</c> was + <item>the pid of the monitored process, if <c><anno>Item</anno></c> was specified as a pid.</item> - <item><c>{RegName, Node}</c>, if <c>Item</c> was specified as + <item><c>{RegName, Node}</c>, if <c><anno>Item</anno></c> was specified as <c>{RegName, Node}</c>.</item> - <item><c>{RegName, Node}</c>, if <c>Item</c> was specified as + <item><c>{RegName, Node}</c>, if <c><anno>Item</anno></c> was specified as <c>RegName</c>. <c>Node</c> will in this case be the name of the local node (<c>node()</c>).</item> </list> @@ -2644,7 +2277,7 @@ os_prompt% </pre> <item> <p>Either the exit reason of the process, <c>noproc</c> (non-existing process), or <c>noconnection</c> (no - connection to <c>Node</c>).</p> + connection to <c><anno>Node</anno></c>).</p> </item> </taglist> <note> @@ -2662,7 +2295,7 @@ os_prompt% </pre> where remote process monitoring by registered name is not implemented), the call fails with <c>badarg</c>.</p> <p>Making several calls to <c>monitor/2</c> for the same - <c>Item</c> is not an error; it results in as many, completely + <c><anno>Item</anno></c> is not an error; it results in as many, completely independent, monitorings.</p> <note> <p>The format of the <c>'DOWN'</c> message changed in the 5.2 @@ -2680,25 +2313,21 @@ os_prompt% </pre> </desc> </func> <func> - <name>monitor_node(Node, Flag) -> true</name> + <name name="monitor_node" arity="2"/> <fsummary>Monitor the status of a node</fsummary> - <type> - <v>Node = node()</v> - <v>Flag = boolean()</v> - </type> <desc> - <p>Monitors the status of the node <c>Node</c>. If <c>Flag</c> - is <c>true</c>, monitoring is turned on; if <c>Flag</c> is + <p>Monitors the status of the node <c><anno>Node</anno></c>. If <c><anno>Flag</anno></c> + is <c>true</c>, monitoring is turned on; if <c><anno>Flag</anno></c> is <c>false</c>, monitoring is turned off.</p> <p>Making several calls to <c>monitor_node(Node, true)</c> for - the same <c>Node</c> is not an error; it results in as many, + the same <c><anno>Node</anno></c> is not an error; it results in as many, completely independent, monitorings.</p> - <p>If <c>Node</c> fails or does not exist, the message + <p>If <c><anno>Node</anno></c> fails or does not exist, the message <c>{nodedown, Node}</c> is delivered to the process. If a process has made two calls to <c>monitor_node(Node, true)</c> - and <c>Node</c> terminates, two <c>nodedown</c> messages are + and <c><anno>Node</anno></c> terminates, two <c>nodedown</c> messages are delivered to the process. If there is no connection to - <c>Node</c>, there will be an attempt to create one. If this + <c><anno>Node</anno></c>, there will be an attempt to create one. If this fails, a <c>nodedown</c> message is delivered.</p> <p>Nodes connected through hidden connections can be monitored as any other node.</p> @@ -2706,14 +2335,8 @@ os_prompt% </pre> </desc> </func> <func> - <name>erlang:monitor_node(Node, Flag, Options) -> true</name> + <name name="monitor_node" arity="3"/> <fsummary>Monitor the status of a node</fsummary> - <type> - <v>Node = node()</v> - <v>Flag = boolean()</v> - <v>Options = [Option]</v> - <v>Option = allow_passive_connect</v> - </type> <desc> <p>Behaves as <c>monitor_node/2</c> except that it allows an extra option to be given, namely <c>allow_passive_connect</c>. @@ -2736,11 +2359,8 @@ os_prompt% </pre> </desc> </func> <func> - <name>erlang:nif_error(Reason)</name> + <name name="nif_error" arity="1"/> <fsummary>Stop execution with a given reason</fsummary> - <type> - <v>Reason = term()</v> - </type> <desc> <p>Works exactly like <seealso marker="#error/1">erlang:error/1</seealso>, @@ -2751,12 +2371,8 @@ os_prompt% </pre> </desc> </func> <func> - <name>erlang:nif_error(Reason, Args)</name> + <name name="nif_error" arity="2"/> <fsummary>Stop execution with a given reason</fsummary> - <type> - <v>Reason = term()</v> - <v>Args = [term()]</v> - </type> <desc> <p>Works exactly like <seealso marker="#error/2">erlang:error/2</seealso>, @@ -2767,11 +2383,8 @@ os_prompt% </pre> </desc> </func> <func> - <name>node() -> Node</name> + <name name="node" arity="0"/> <fsummary>Name of the local node</fsummary> - <type> - <v>Node = node()</v> - </type> <desc> <p>Returns the name of the local node. If the node is not alive, <c>nonode@nohost</c> is returned instead.</p> @@ -2779,14 +2392,10 @@ os_prompt% </pre> </desc> </func> <func> - <name>node(Arg) -> Node</name> + <name name="node" arity="1"/> <fsummary>At which node is a pid, port or reference located</fsummary> - <type> - <v>Arg = pid() | port() | reference()</v> - <v>Node = node()</v> - </type> <desc> - <p>Returns the node where <c>Arg</c> is located. <c>Arg</c> can + <p>Returns the node where <c><anno>Arg</anno></c> is located. <c><anno>Arg</anno></c> can be a pid, a reference, or a port. If the local node is not alive, <c>nonode@nohost</c> is returned.</p> <p>Allowed in guard tests.</p> @@ -2801,17 +2410,13 @@ os_prompt% </pre> </desc> </func> <func> - <name>nodes(Arg | [Arg]) -> Nodes</name> + <name name="nodes" arity="1"/> <fsummary>All nodes of a certain type in the system</fsummary> - <type> - <v>Arg = visible | hidden | connected | this | known</v> - <v>Nodes = [node()]</v> - </type> <desc> <p>Returns a list of nodes according to argument given. The result returned when the argument is a list, is the list of nodes satisfying the disjunction(s) of the list elements.</p> - <p><c>Arg</c> can be any of the following:</p> + <p><c><anno>NodeType</anno></c> can be any of the following:</p> <taglist> <tag><c>visible</c></tag> <item> @@ -2840,15 +2445,12 @@ os_prompt% </pre> <c>nodes() = nodes(visible)</c>.</p> <p>If the local node is not alive, <c>nodes(this) == nodes(known) == [nonode@nohost]</c>, for - any other <c>Arg</c> the empty list [] is returned.</p> + any other <c><anno>Arg</anno></c> the empty list [] is returned.</p> </desc> </func> <func> - <name>now() -> timestamp()</name> - <type> - <v>timestamp() = {MegaSecs, Secs, MicroSecs}</v> - <v>MegaSecs = Secs = MicroSecs = integer() >= 0</v> - </type> + <name name="now" arity="0"/> + <type name="timestamp"/> <fsummary>Elapsed time since 00:00 GMT</fsummary> <desc> <p>Returns the tuple <c>{MegaSecs, Secs, MicroSecs}</c> which is @@ -2866,35 +2468,19 @@ os_prompt% </pre> </desc> </func> <func> - <name>open_port(PortName, PortSettings) -> port()</name> + <name name="open_port" arity="2"/> <fsummary>Open a port</fsummary> - <type> - <v>PortName = {spawn, Command} | {spawn_driver, Command} | {spawn_executable, FileName} | {fd, In, Out}</v> - <v> Command = string()</v> - <v> FileName = [ FileNameChar ] | binary()</v> - <v> FileNameChar = integer() (1..255 or any Unicode codepoint, see description)</v> - <v> In = Out = integer()</v> - <v>PortSettings = [Opt]</v> - <v> Opt = {packet, N} | stream | {line, L} | {cd, Dir} | {env, Env} | {args, [ ArgString ]} | {arg0, ArgString} | exit_status | use_stdio | nouse_stdio | stderr_to_stdout | in | out | binary | eof</v> - <v> N = 1 | 2 | 4</v> - <v> L = integer()</v> - <v> Dir = string()</v> - <v> ArgString = [ FileNameChar ] | binary()</v> - <v> Env = [{Name, Val}]</v> - <v> Name = string()</v> - <v> Val = string() | false</v> - </type> <desc> <p>Returns a port identifier as the result of opening a new Erlang port. A port can be seen as an external Erlang - process. <c>PortName</c> is one of the following:</p> + process. <c><anno>PortName</anno></c> is one of the following:</p> <taglist> - <tag><c>{spawn, Command}</c></tag> + <tag><c>{spawn, <anno>Command</anno>}</c></tag> <item> - <p>Starts an external program. <c>Command</c> is the name - of the external program which will be run. <c>Command</c> + <p>Starts an external program. <c><anno>Command</anno></c> is the name + of the external program which will be run. <c><anno>Command</anno></c> runs outside the Erlang work space unless an Erlang - driver with the name <c>Command</c> is found. If found, + driver with the name <c><anno>Command</anno></c> is found. If found, that driver will be started. A driver runs in the Erlang workspace, which means that it is linked with the Erlang runtime system.</p> @@ -2914,24 +2500,24 @@ os_prompt% </pre> name of the executable (or driver). This (among other things) makes this option unsuitable for running programs having spaces in file or directory names. Use - {spawn_executable, Command} instead if spaces in executable + {spawn_executable, <anno>Command</anno>} instead if spaces in executable file names is desired.</p> </item> - <tag><c>{spawn_driver, Command}</c></tag> + <tag><c>{spawn_driver, <anno>Command</anno>}</c></tag> <item> - <p>Works like <c>{spawn, Command}</c>, but demands the + <p>Works like <c>{spawn, <anno>Command</anno>}</c>, but demands the first (space separated) token of the command to be the name of a loaded driver. If no driver with that name is loaded, a <c>badarg</c> error is raised.</p> </item> - <tag><c>{spawn_executable, Command}</c></tag> + <tag><c>{spawn_executable, <anno>FileName</anno>}</c></tag> <item> - <p>Works like <c>{spawn, Command}</c>, but only runs - external executables. The <c>Command</c> in its whole + <p>Works like <c>{spawn, <anno>FileName</anno>}</c>, but only runs + external executables. The <c><anno>FileName</anno></c> in its whole is used as the name of the executable, including any spaces. If arguments are to be passed, the - <c>args</c> and <c>arg0</c> <c>PortSettings</c> can be used.</p> + <c>args</c> and <c>arg0</c> <c><anno>PortSettings</anno></c> can be used.</p> <p>The shell is not usually invoked to start the program, it's executed directly. Neither is the @@ -2962,7 +2548,7 @@ os_prompt% </pre> of the executable is limited to the ISO-latin-1 character set.</p></note> - <p>If the <c>Command</c> cannot be run, an error + <p>If the <c><anno>FileName</anno></c> cannot be run, an error exception, with the posix error code as the reason, is raised. The error reason may differ between operating systems. Typically the error <c>enoent</c> is raised @@ -2970,23 +2556,23 @@ os_prompt% </pre> <c>eaccess</c> is raised when the given file is not executable.</p> </item> - <tag><c>{fd, In, Out}</c></tag> + <tag><c>{fd, <anno>In</anno>, <anno>Out</anno>}</c></tag> <item> <p>Allows an Erlang process to access any currently opened file descriptors used by Erlang. The file descriptor - <c>In</c> can be used for standard input, and the file - descriptor <c>Out</c> for standard output. It is only + <c><anno>In</anno></c> can be used for standard input, and the file + descriptor <c><anno>Out</anno></c> for standard output. It is only used for various servers in the Erlang operating system (<c>shell</c> and <c>user</c>). Hence, its use is very limited.</p> </item> </taglist> - <p><c>PortSettings</c> is a list of settings for the port. + <p><c><anno>PortSettings</anno></c> is a list of settings for the port. Valid settings are:</p> <taglist> - <tag><c>{packet, N}</c></tag> + <tag><c>{packet, <anno>N</anno>}</c></tag> <item> - <p>Messages are preceded by their length, sent in <c>N</c> + <p>Messages are preceded by their length, sent in <c><anno>N</anno></c> bytes, with the most significant byte first. Valid values for <c>N</c> are 1, 2, or 4.</p> </item> @@ -2996,7 +2582,7 @@ os_prompt% </pre> user-defined protocol must be used between the Erlang process and the external object.</p> </item> - <tag><c>{line, L}</c></tag> + <tag><c>{line, <anno>L</anno>}</c></tag> <item> <p>Messages are delivered on a per line basis. Each line (delimited by the OS-dependent newline sequence) is @@ -3004,7 +2590,7 @@ os_prompt% </pre> is <c>{Flag, Line}</c>, where <c>Flag</c> is either <c>eol</c> or <c>noeol</c> and <c>Line</c> is the actual data delivered (without the newline sequence).</p> - <p><c>L</c> specifies the maximum line length in bytes. + <p><c><anno>L</anno></c> specifies the maximum line length in bytes. Lines longer than this will be delivered in more than one message, with the <c>Flag</c> set to <c>noeol</c> for all but the last message. If end of file is encountered @@ -3012,36 +2598,36 @@ os_prompt% </pre> sequence, the last line will also be delivered with the <c>Flag</c> set to <c>noeol</c>. In all other cases, lines are delivered with <c>Flag</c> set to <c>eol</c>.</p> - <p>The <c>{packet, N}</c> and <c>{line, L}</c> settings are + <p>The <c>{packet, <anno>N</anno>}</c> and <c>{line, <anno>L</anno>}</c> settings are mutually exclusive.</p> </item> - <tag><c>{cd, Dir}</c></tag> + <tag><c>{cd, <anno>Dir</anno>}</c></tag> <item> - <p>This is only valid for <c>{spawn, Command}</c> and - <c>{spawn_executable, Command}</c>. - The external program starts using <c>Dir</c> as its - working directory. <c>Dir</c> must be a string. Not + <p>This is only valid for <c>{spawn, <anno>Command</anno>}</c> and + <c>{spawn_executable, <anno>FileName</anno>}</c>. + The external program starts using <c><anno>Dir</anno></c> as its + working directory. <c><anno>Dir</anno></c> must be a string. Not available on VxWorks.</p> </item> - <tag><c>{env, Env}</c></tag> + <tag><c>{env, <anno>Env</anno>}</c></tag> <item> - <p>This is only valid for <c>{spawn, Command}</c> and - <c>{spawn_executable, Command}</c>. + <p>This is only valid for <c>{spawn, <anno>Command</anno>}</c> and + <c>{spawn_executable, <anno>FileName</anno>}</c>. The environment of the started process is extended using - the environment specifications in <c>Env</c>.</p> - <p><c>Env</c> should be a list of tuples <c>{Name, Val}</c>, - where <c>Name</c> is the name of an environment variable, - and <c>Val</c> is the value it is to have in the spawned - port process. Both <c>Name</c> and <c>Val</c> must be - strings. The one exception is <c>Val</c> being the atom + the environment specifications in <c><anno>Env</anno></c>.</p> + <p><c><anno>Env</anno></c> should be a list of tuples <c>{<anno>Name</anno>, <anno>Val</anno>}</c>, + where <c><anno>Name</anno></c> is the name of an environment variable, + and <c><anno>Val</anno></c> is the value it is to have in the spawned + port process. Both <c><anno>Name</anno></c> and <c><anno>Val</anno></c> must be + strings. The one exception is <c><anno>Val</anno></c> being the atom <c>false</c> (in analogy with <c>os:getenv/1</c>), which removes the environment variable. Not available on VxWorks.</p> </item> - <tag><c>{args, [ string() ]}</c></tag> + <tag><c>{args, [ string() | binary() ]}</c></tag> <item> - <p>This option is only valid for <c>{spawn_executable, Command}</c> + <p>This option is only valid for <c>{spawn_executable, <anno>FileName</anno>}</c> and specifies arguments to the executable. Each argument is given as a separate string and (on Unix) eventually ends up as one element each in the argument vector. On @@ -3084,10 +2670,10 @@ os_prompt% </pre> option can be used.</p> </item> - <tag><c>{arg0, string()}</c></tag> + <tag><c>{arg0, string() | binary()}</c></tag> <item> - <p>This option is only valid for <c>{spawn_executable, Command}</c> + <p>This option is only valid for <c>{spawn_executable, <anno>FileName</anno>}</c> and explicitly specifies the program name argument when running an executable. This might in some circumstances, on some operating systems, be desirable. How the program @@ -3101,9 +2687,9 @@ os_prompt% </pre> <tag><c>exit_status</c></tag> <item> - <p>This is only valid for <c>{spawn, Command}</c> where - <c>Command</c> refers to an external program, and for - <c>{spawn_executable, Command}</c>.</p> + <p>This is only valid for <c>{spawn, <anno>Command</anno>}</c> where + <c><anno>Command</anno></c> refers to an external program, and for + <c>{spawn_executable, <anno>FileName</anno>}</c>.</p> <p>When the external process connected to the port exits, a message of the form <c>{Port,{exit_status,Status}}</c> is sent to the connected process, where <c>Status</c> is the @@ -3118,8 +2704,8 @@ os_prompt% </pre> </item> <tag><c>use_stdio</c></tag> <item> - <p>This is only valid for <c>{spawn, Command}</c> and - <c>{spawn_executable, Command}</c>. It + <p>This is only valid for <c>{spawn, <anno>Command</anno>}</c> and + <c>{spawn_executable, <anno>FileName</anno>}</c>. It allows the standard input and output (file descriptors 0 and 1) of the spawned (UNIX) process for communication with Erlang.</p> @@ -3216,7 +2802,7 @@ os_prompt% </pre> </item> <tag><c>enoent</c></tag> <item> - <p>The <c>Command</c> given in <c>{spawn_executable, Command}</c> does not point out an existing file.</p> + <p>The <c><anno>FileName</anno></c> given in <c>{spawn_executable, <anno>FileName</anno>}</c> does not point out an existing file.</p> </item> </taglist> <p>During use of a port opened using <c>{spawn, Name}</c>, @@ -3232,56 +2818,47 @@ os_prompt% </pre> </desc> </func> <func> - <name>erlang:phash(Term, Range) -> Hash</name> + <name name="phash" arity="2"/> + <type_desc variable="Range">Range = 1..2^32, Hash = 1..Range</type_desc> <fsummary>Portable hash function</fsummary> - <type> - <v>Term = term()</v> - <v>Range = 1..2^32</v> - <v>Hash = 1..Range</v> - </type> <desc> <p>Portable hash function that will give the same hash for the same Erlang term regardless of machine architecture and ERTS version (the BIF was introduced in ERTS 4.9.1.1). Range can be between 1 and 2^32, the function returns a hash value - for <c>Term</c> within the range <c>1..Range</c>.</p> + for <c><anno>Term</anno></c> within the range <c>1..<anno>Range</anno></c>.</p> <p>This BIF could be used instead of the old deprecated <c>erlang:hash/2</c> BIF, as it calculates better hashes for all data-types, but consider using <c>phash2/1,2</c> instead.</p> </desc> </func> <func> - <name>erlang:phash2(Term [, Range]) -> Hash</name> + <name name="phash2" arity="1"/> + <name name="phash2" arity="2"/> + <type_desc variable="Range">1..2^32</type_desc> + <type_desc variable="Hash">0..Range-1</type_desc> <fsummary>Portable hash function</fsummary> - <type> - <v>Term = term()</v> - <v>Range = 1..2^32</v> - <v>Hash = 0..Range-1</v> - </type> <desc> <p>Portable hash function that will give the same hash for the same Erlang term regardless of machine architecture and ERTS version (the BIF was introduced in ERTS 5.2). Range can be between 1 and 2^32, the function returns a hash value for - <c>Term</c> within the range <c>0..Range-1</c>. When called - without the <c>Range</c> argument, a value in the range + <c><anno>Term</anno></c> within the range <c>0..<anno>Range</anno>-1</c>. When called + without the <c><anno>Range</anno></c> argument, a value in the range <c>0..2^27-1</c> is returned.</p> <p>This BIF should always be used for hashing terms. It distributes small integers better than <c>phash/2</c>, and it is faster for bignums and binaries.</p> - <p>Note that the range <c>0..Range-1</c> is different from - the range of <c>phash/2</c> (<c>1..Range</c>).</p> + <p>Note that the range <c>0..<anno>Range</anno>-1</c> is different from + the range of <c>phash/2</c> (<c>1..<anno>Range</anno></c>).</p> </desc> </func> <func> - <name>pid_to_list(Pid) -> string()</name> + <name name="pid_to_list" arity="1"/> <fsummary>Text representation of a pid</fsummary> - <type> - <v>Pid = pid()</v> - </type> <desc> <p>Returns a string which corresponds to the text - representation of <c>Pid</c>.</p> + representation of <c><anno>Pid</anno></c>.</p> <warning> <p>This BIF is intended for debugging and for use in the Erlang operating system. It should not be used in @@ -3290,88 +2867,74 @@ os_prompt% </pre> </desc> </func> <func> - <name>port_close(Port) -> true</name> + <name name="port_close" arity="1"/> <fsummary>Close an open port</fsummary> - <type> - <v>Port = port() | atom()</v> - </type> <desc> <p>Closes an open port. Roughly the same as - <c>Port ! {self(), close}</c> except for the error behaviour + <c><anno>Port</anno> ! {self(), close}</c> except for the error behaviour (see below), and that the port does <em>not</em> reply with <c>{Port, closed}</c>. Any process may close a port with <c>port_close/1</c>, not only the port owner (the connected process).</p> - <p>For comparison: <c>Port ! {self(), close}</c> fails with - <c>badarg</c> if <c>Port</c> cannot be sent to (i.e., - <c>Port</c> refers neither to a port nor to a process). If - <c>Port</c> is a closed port nothing happens. If <c>Port</c> + <p>For comparison: <c><anno>Port</anno> ! {self(), close}</c> fails with + <c>badarg</c> if <c><anno>Port</anno></c> cannot be sent to (i.e., + <c><anno>Port</anno></c> refers neither to a port nor to a process). If + <c><anno>Port</anno></c> is a closed port nothing happens. If <c><anno>Port</anno></c> is an open port and the calling process is the port owner, the port replies with <c>{Port, closed}</c> when all buffers have been flushed and the port really closes, but if the calling process is not the port owner the <em>port owner</em> fails with <c>badsig</c>.</p> <p>Note that any process can close a port using - <c>Port ! {PortOwner, close}</c> just as if it itself was + <c><anno>Port</anno> ! {PortOwner, close}</c> just as if it itself was the port owner, but the reply always goes to the port owner.</p> <p>In short: <c>port_close(Port)</c> has a cleaner and more - logical behaviour than <c>Port ! {self(), close}</c>.</p> - <p>Failure: <c>badarg</c> if <c>Port</c> is not an open port or + logical behaviour than <c><anno>Port</anno> ! {self(), close}</c>.</p> + <p>Failure: <c>badarg</c> if <c><anno>Port</anno></c> is not an open port or the registered name of an open port.</p> </desc> </func> <func> - <name>port_command(Port, Data) -> true</name> + <name name="port_command" arity="2"/> <fsummary>Send data to a port</fsummary> - <type> - <v>Port = port() | atom()</v> - <v>Data = iodata()</v> - </type> <desc> <p>Sends data to a port. Same as - <c>Port ! {self(), {command, Data}}</c> except for the error + <c><anno>Port</anno> ! {self(), {command, Data}}</c> except for the error behaviour (see below). Any process may send data to a port with <c>port_command/2</c>, not only the port owner (the connected process).</p> - <p>For comparison: <c>Port ! {self(), {command, Data}}</c> - fails with <c>badarg</c> if <c>Port</c> cannot be sent to - (i.e., <c>Port</c> refers neither to a port nor to a process). - If <c>Port</c> is a closed port the data message disappears - without a sound. If <c>Port</c> is open and the calling + <p>For comparison: <c><anno>Port</anno> ! {self(), {command, Data}}</c> + fails with <c>badarg</c> if <c><anno>Port</anno></c> cannot be sent to + (i.e., <c><anno>Port</anno></c> refers neither to a port nor to a process). + If <c><anno>Port</anno></c> is a closed port the data message disappears + without a sound. If <c><anno>Port</anno></c> is open and the calling process is not the port owner, the <em>port owner</em> fails with <c>badsig</c>. The port owner fails with <c>badsig</c> - also if <c>Data</c> is not a valid IO list.</p> + also if <c><anno>Data</anno></c> is not a valid IO list.</p> <p>Note that any process can send to a port using - <c>Port ! {PortOwner, {command, Data}}</c> just as if it + <c><anno>Port</anno> ! {PortOwner, {command, <anno>Data</anno>}}</c> just as if it itself was the port owner.</p> - <p>In short: <c>port_command(Port, Data)</c> has a cleaner and + <p>In short: <c>port_command(<anno>Port</anno>, <anno>Data</anno>)</c> has a cleaner and more logical behaviour than - <c>Port ! {self(), {command, Data}}</c>.</p> + <c><anno>Port</anno> ! {self(), {command, Data}}</c>.</p> <p>If the port is busy, the calling process will be suspended until the port is not busy anymore.</p> <p>Failures:</p> <taglist> <tag><c>badarg</c></tag> <item> - If <c>Port</c> is not an open port or the registered name + If <c><anno>Port</anno></c> is not an open port or the registered name of an open port. </item> <tag><c>badarg</c></tag> <item> - If <c>Data</c> is not a valid io list. + If <c><anno>Data</anno></c> is not a valid io list. </item> </taglist> </desc> </func> <func> - <name>port_command(Port, Data, OptionList) -> boolean()</name> + <name name="port_command" arity="3"/> <fsummary>Send data to a port</fsummary> - <type> - <v>Port = port() | atom()</v> - <v>Data = iodata()</v> - <v>OptionList = [Option]</v> - <v>Option = force</v> - <v>Option = nosuspend</v> - </type> <desc> <p>Sends data to a port. <c>port_command(Port, Data, [])</c> equals <c>port_command(Port, Data)</c>.</p> @@ -3379,7 +2942,7 @@ os_prompt% </pre> otherwise, <c>true</c> is returned.</p> <p>If the port is busy, the calling process will be suspended until the port is not busy anymore.</p> - <p>Currently the following <c>Option</c>s are valid:</p> + <p>Currently the following <c><anno>Option</anno></c>s are valid:</p> <taglist> <tag><c>force</c></tag> <item>The calling process will not be suspended if the port is @@ -3403,16 +2966,16 @@ os_prompt% </pre> <taglist> <tag><c>badarg</c></tag> <item> - If <c>Port</c> is not an open port or the registered name + If <c><anno>Port</anno></c> is not an open port or the registered name of an open port. </item> <tag><c>badarg</c></tag> <item> - If <c>Data</c> is not a valid io list. + If <c><anno>Data</anno></c> is not a valid io list. </item> <tag><c>badarg</c></tag> <item> - If <c>OptionList</c> is not a valid option list. + If <c><anno>OptionList</anno></c> is not a valid option list. </item> <tag><c>notsup</c></tag> <item> @@ -3424,15 +2987,11 @@ os_prompt% </pre> </desc> </func> <func> - <name>port_connect(Port, Pid) -> true</name> + <name name="port_connect" arity="2"/> <fsummary>Set the owner of a port</fsummary> - <type> - <v>Port = port() | atom()</v> - <v>Pid = pid()</v> - </type> <desc> - <p>Sets the port owner (the connected port) to <c>Pid</c>. - Roughly the same as <c>Port ! {self(), {connect, Pid}}</c> + <p>Sets the port owner (the connected port) to <c><anno>Pid</anno></c>. + Roughly the same as <c><anno>Port</anno> ! {self(), {connect, <anno>Pid</anno>}}</c> except for the following:</p> <list type="bulleted"> <item> @@ -3450,164 +3009,146 @@ os_prompt% </pre> <c>unlink(Port)</c> if this is not desired. Any process may set the port owner to be any process with <c>port_connect/2</c>.</p> - <p>For comparison: <c>Port ! {self(), {connect, Pid}}</c> fails - with <c>badarg</c> if <c>Port</c> cannot be sent to (i.e., - <c>Port</c> refers neither to a port nor to a process). If - <c>Port</c> is a closed port nothing happens. If <c>Port</c> + <p>For comparison: <c><anno>Port</anno> ! {self(), {connect, <anno>Pid</anno>}}</c> fails + with <c>badarg</c> if <c><anno>Port</anno></c> cannot be sent to (i.e., + <c><anno>Port</anno></c> refers neither to a port nor to a process). If + <c><anno>Port</anno></c> is a closed port nothing happens. If <c><anno>Port</anno></c> is an open port and the calling process is the port owner, the port replies with <c>{Port, connected}</c> to the old port owner. Note that the old port owner is still linked to - the port, and that the new is not. If <c>Port</c> is an open + the port, and that the new is not. If <c><anno>Port</anno></c> is an open port and the calling process is not the port owner, the <em>port owner</em> fails with <c>badsig</c>. The port - owner fails with <c>badsig</c> also if <c>Pid</c> is not an + owner fails with <c>badsig</c> also if <c><anno>Pid</anno></c> is not an existing local pid.</p> <p>Note that any process can set the port owner using - <c>Port ! {PortOwner, {connect, Pid}}</c> just as if it + <c><anno>Port</anno> ! {PortOwner, {connect, <anno>Pid</anno>}}</c> just as if it itself was the port owner, but the reply always goes to the port owner.</p> - <p>In short: <c>port_connect(Port, Pid)</c> has a cleaner and + <p>In short: <c>port_connect(<anno>Port</anno>, <anno>Pid</anno>)</c> has a cleaner and more logical behaviour than - <c>Port ! {self(),{connect,Pid}}</c>.</p> - <p>Failure: <c>badarg</c> if <c>Port</c> is not an open port - or the registered name of an open port, or if <c>Pid</c> is + <c><anno>Port</anno> ! {self(),{connect,<anno>Pid</anno>}}</c>.</p> + <p>Failure: <c>badarg</c> if <c><anno>Port</anno></c> is not an open port + or the registered name of an open port, or if <c><anno>Pid</anno></c> is not an existing local pid.</p> </desc> </func> <func> - <name>port_control(Port, Operation, Data) -> Res</name> + <name name="port_control" arity="3"/> <fsummary>Perform a synchronous control operation on a port</fsummary> - <type> - <v>Port = port() | atom()</v> - <v>Operation = integer()</v> - <v>Data = Res = iodata()</v> - </type> <desc> <p>Performs a synchronous control operation on a port. - The meaning of <c>Operation</c> and <c>Data</c> depends on + The meaning of <c><anno>Operation</anno></c> and <c><anno>Data</anno></c> depends on the port, i.e., on the port driver. Not all port drivers support this control feature.</p> <p>Returns: a list of integers in the range 0 through 255, or a binary, depending on the port driver. The meaning of the returned data also depends on the port driver.</p> - <p>Failure: <c>badarg</c> if <c>Port</c> is not an open port or - the registered name of an open port, if <c>Operation</c> + <p>Failure: <c>badarg</c> if <c><anno>Port</anno></c> is not an open port or + the registered name of an open port, if <c><anno>Operation</anno></c> cannot fit in a 32-bit integer, if the port driver does not support synchronous control operations, or if the port driver so decides for any reason (probably something wrong with - <c>Operation</c> or <c>Data</c>).</p> + <c><anno>Operation</anno></c> or <c><anno>Data</anno></c>).</p> </desc> </func> <func> - <name>erlang:port_call(Port, Operation, Data) -> term()</name> + <name name="port_call" arity="3"/> <fsummary>Synchronous call to a port with term data</fsummary> - <type> - <v>Port = port() | atom()</v> - <v>Operation = integer()</v> - <v>Data = term()</v> - </type> <desc> <p>Performs a synchronous call to a port. The meaning of - <c>Operation</c> and <c>Data</c> depends on the port, i.e., + <c><anno>Operation</anno></c> and <c><anno>Data</anno></c> depends on the port, i.e., on the port driver. Not all port drivers support this feature.</p> - <p><c>Port</c> is a port identifier, referring to a driver.</p> - <p><c>Operation</c> is an integer, which is passed on to + <p><c><anno>Port</anno></c> is a port identifier, referring to a driver.</p> + <p><c><anno>Operation</anno></c> is an integer, which is passed on to the driver.</p> - <p><c>Data</c> is any Erlang term. This data is converted to + <p><c><anno>Data</anno></c> is any Erlang term. This data is converted to binary term format and sent to the port.</p> <p>Returns: a term from the driver. The meaning of the returned data also depends on the port driver.</p> - <p>Failure: <c>badarg</c> if <c>Port</c> is not an open port or - the registered name of an open port, if <c>Operation</c> + <p>Failure: <c>badarg</c> if <c><anno>Port</anno></c> is not an open port or + the registered name of an open port, if <c><anno>Operation</anno></c> cannot fit in a 32-bit integer, if the port driver does not support synchronous control operations, or if the port driver so decides for any reason (probably something wrong with - <c>Operation</c> or <c>Data</c>).</p> + <c><anno>Operation</anno></c> or <c><anno>Data</anno></c>).</p> </desc> </func> <func> - <name>erlang:port_info(Port) -> [{Item, Info}] | undefined</name> + <name name="port_info" arity="1"/> + <type name="port_info_result_item"/> <fsummary>Information about a port</fsummary> - <type> - <v>Port = port() | atom()</v> - <v>Item, Info -- see below</v> - </type> <desc> <p>Returns a list containing tuples with information about - the <c>Port</c>, or <c>undefined</c> if the port is not open. + the <c><anno>Port</anno></c>, or <c>undefined</c> if the port is not open. The order of the tuples is not defined, nor are all the tuples mandatory.</p> <taglist> - <tag><c>{registered_name, RegName}</c></tag> + <tag><c>{registered_name, <anno>RegName</anno>}</c></tag> <item> - <p><c>RegName</c> (an atom) is the registered name of + <p><c><anno>RegName</anno></c> (an atom) is the registered name of the port. If the port has no registered name, this tuple is not present in the list.</p> </item> - <tag><c>{id, Index}</c></tag> + <tag><c>{id, <anno>Index</anno>}</c></tag> <item> - <p><c>Index</c> (an integer) is the internal index of the + <p><c><anno>Index</anno></c> (an integer) is the internal index of the port. This index may be used to separate ports.</p> </item> - <tag><c>{connected, Pid}</c></tag> + <tag><c>{connected, <anno>Pid</anno>}</c></tag> <item> - <p><c>Pid</c> is the process connected to the port.</p> + <p><c><anno>Pid</anno></c> is the process connected to the port.</p> </item> - <tag><c>{links, Pids}</c></tag> + <tag><c>{links, <anno>Pids</anno>}</c></tag> <item> - <p><c>Pids</c> is a list of pids to which processes the + <p><c><anno>Pids</anno></c> is a list of pids to which processes the port is linked.</p> </item> - <tag><c>{name, String}</c></tag> + <tag><c>{name, <anno>String</anno>}</c></tag> <item> - <p><c>String</c> is the command name set by + <p><c><anno>String</anno></c> is the command name set by <c>open_port</c>.</p> </item> - <tag><c>{input, Bytes}</c></tag> + <tag><c>{input, <anno>Bytes</anno>}</c></tag> <item> - <p><c>Bytes</c> is the total number of bytes read from + <p><c><anno>Bytes</anno></c> is the total number of bytes read from the port.</p> </item> - <tag><c>{output, Bytes}</c></tag> + <tag><c>{output, <anno>Bytes</anno>}</c></tag> <item> - <p><c>Bytes</c> is the total number of bytes written to + <p><c><anno>Bytes</anno></c> is the total number of bytes written to the port.</p> </item> - <tag><c>{os_pid, Integer | undefined}</c></tag> + <tag><c>{os_pid, <anno>OsPid</anno> | undefined}</c></tag> <item> - <p><c>Integer</c> is the process identifier (or equivalent) of an OS process created with <c>open_port({spawn | spawn_executable, Command}, Options)</c>. If the port is not the result of spawning an OS process, the value is <c>undefined</c>.</p> + <p><c> <anno>OsPid</anno></c> is the process identifier (or equivalent) of an OS process created with <c>open_port({spawn | spawn_executable, Command}, Options)</c>. If the port is not the result of spawning an OS process, the value is <c>undefined</c>.</p> </item> </taglist> - <p>Failure: <c>badarg</c> if <c>Port</c> is not a local port.</p> + <p>Failure: <c>badarg</c> if <c><anno>Port</anno></c> is not a local port.</p> </desc> </func> <func> - <name>erlang:port_info(Port, Item) -> {Item, Info} | undefined | []</name> + <name name="port_info" arity="2"/> + <type name="port_info_item"/> + <type name="port_info_result_item"/> <fsummary>Information about a port</fsummary> - <type> - <v>Port = port() | atom()</v> - <v>Item, Info -- see below</v> - </type> - <desc> - <p>Returns information about <c>Port</c> as specified - by <c>Item</c>, or <c>undefined</c> if the port is not open. - Also, if <c>Item == registered_name</c> and the port has no - registered name, [] is returned.</p> - <p>For valid values of <c>Item</c>, and corresponding - values of <c>Info</c>, see + <desc> + <p>Returns information about <c><anno>Port</anno></c> as specified + by <c><anno>Item</anno></c>, or <c>undefined</c> if the port is not open. + Also, if <c>Item =:= registered_name</c> and the port has no + registered name, <c>[]</c> is returned.</p> + <p>For valid values of <c><anno>Item</anno></c>, and corresponding + values of <c><anno>Result</anno></c>, see <seealso marker="#port_info/1">erlang:port_info/1</seealso>.</p> - <p>Failure: <c>badarg</c> if <c>Port</c> is not a local port.</p> + <p>Failure: <c>badarg</c> if <c><anno>Port</anno></c> is not a local port.</p> </desc> </func> <func> - <name>erlang:port_to_list(Port) -> string()</name> + <name name="port_to_list" arity="1"/> <fsummary>Text representation of a port identifier</fsummary> - <type> - <v>Port = port()</v> - </type> <desc> <p>Returns a string which corresponds to the text - representation of the port identifier <c>Port</c>.</p> + representation of the port identifier <c><anno>Port</anno></c>.</p> <warning> <p>This BIF is intended for debugging and for use in the Erlang operating system. It should not be used in @@ -3616,18 +3157,15 @@ os_prompt% </pre> </desc> </func> <func> - <name>erlang:ports() -> [port()]</name> + <name name="ports" arity="0"/> <fsummary>All open ports</fsummary> <desc> <p>Returns a list of all ports on the local node.</p> </desc> </func> <func> - <name>pre_loaded() -> [Module]</name> + <name name="pre_loaded" arity="0"/> <fsummary>List of all pre-loaded modules</fsummary> - <type> - <v>Module = atom()</v> - </type> <desc> <p>Returns a list of Erlang modules which are pre-loaded in the system. As all loading of code is done through the file @@ -3636,220 +3174,222 @@ os_prompt% </pre> </desc> </func> <func> - <name>erlang:process_display(Pid, Type) -> void()</name> + <name name="process_display" arity="2"/> <fsummary>Write information about a local process on standard error</fsummary> - <type> - <v>Pid = pid()</v> - <v>Type = backtrace</v> - </type> <desc> - <p>Writes information about the local process <c>Pid</c> on + <p>Writes information about the local process <c><anno>Pid</anno></c> on standard error. The currently allowed value for the atom - <c>Type</c> is <c>backtrace</c>, which shows the contents of + <c><anno>Type</anno></c> is <c>backtrace</c>, which shows the contents of the call stack, including information about the call chain, with the current function printed first. The format of the output is not further defined.</p> </desc> </func> <func> - <name>process_flag(Flag, Value) -> OldValue</name> - <fsummary>Set process flags for the calling process</fsummary> - <type> - <v>Flag, Value, OldValue -- see below</v> - </type> + <name name="process_flag" arity="2" clause_i="1"/> + <fsummary>Set process flag trap_exit for the calling process</fsummary> <desc> - <p>Sets certain flags for the process which calls this - function. Returns the old value of the flag.</p> - <taglist> - <tag><c>process_flag(trap_exit, Boolean)</c></tag> - <item> - <p>When <c>trap_exit</c> is set to <c>true</c>, exit signals - arriving to a process are converted to <c>{'EXIT', From, Reason}</c> messages, which can be received as ordinary - messages. If <c>trap_exit</c> is set to <c>false</c>, the - process exits if it receives an exit signal other than - <c>normal</c> and the exit signal is propagated to its - linked processes. Application processes should normally - not trap exits.</p> - <p>See also <seealso marker="#exit/2">exit/2</seealso>.</p> - </item> - <tag><c>process_flag(error_handler, Module)</c></tag> - <item> - <p>This is used by a process to redefine the error handler - for undefined function calls and undefined registered - processes. Inexperienced users should not use this flag - since code auto-loading is dependent on the correct - operation of the error handling module.</p> - </item> - <tag><c>process_flag(min_heap_size, MinHeapSize)</c></tag> - <item> - <p>This changes the minimum heap size for the calling - process.</p> - </item> - <tag><c>process_flag(min_bin_vheap_size, MinBinVHeapSize)</c></tag> - <item> - <p>This changes the minimum binary virtual heap size for the calling - process.</p> - </item> - <tag><marker id="process_flag_priority"><c>process_flag(priority, Level)</c></marker></tag> - <item> - <p>This sets the process priority. <c>Level</c> is an atom. - There are currently four priority levels: <c>low</c>, - <c>normal</c>, <c>high</c>, and <c>max</c>. The default - priority level is <c>normal</c>. <em>NOTE</em>: The - <c>max</c> priority level is reserved for internal use in - the Erlang runtime system, and should <em>not</em> be used - by others. - </p> - <p>Internally in each priority level processes are scheduled - in a round robin fashion. - </p> - <p>Execution of processes on priority <c>normal</c> and - priority <c>low</c> will be interleaved. Processes on - priority <c>low</c> will be selected for execution less - frequently than processes on priority <c>normal</c>. - </p> - <p>When there are runnable processes on priority <c>high</c> - no processes on priority <c>low</c>, or <c>normal</c> will - be selected for execution. Note, however, that this does - <em>not</em> mean that no processes on priority <c>low</c>, - or <c>normal</c> will be able to run when there are - processes on priority <c>high</c> running. On the runtime - system with SMP support there might be more processes running - in parallel than processes on priority <c>high</c>, i.e., - a <c>low</c>, and a <c>high</c> priority process might - execute at the same time. - </p> - <p>When there are runnable processes on priority <c>max</c> - no processes on priority <c>low</c>, <c>normal</c>, or - <c>high</c> will be selected for execution. As with the - <c>high</c> priority, processes on lower priorities might - execute in parallel with processes on priority <c>max</c>. - </p> - <p>Scheduling is preemptive. Regardless of priority, a process - is preempted when it has consumed more than a certain amount - of reductions since the last time it was selected for - execution. - </p> - <p><em>NOTE</em>: You should not depend on the scheduling - to remain exactly as it is today. Scheduling, at least on - the runtime system with SMP support, is very likely to be - modified in the future in order to better utilize available - processor cores. - </p> - <p>There is currently <em>no</em> automatic mechanism for - avoiding priority inversion, such as priority inheritance, - or priority ceilings. When using priorities you have - to take this into account and handle such scenarios by - yourself. - </p> - <p>Making calls from a <c>high</c> priority process into code - that you don't have control over may cause the <c>high</c> - priority process to wait for a processes with lower - priority, i.e., effectively decreasing the priority of the - <c>high</c> priority process during the call. Even if this - isn't the case with one version of the code that you don't - have under your control, it might be the case in a future - version of it. This might, for example, happen if a - <c>high</c> priority process triggers code loading, since - the code server runs on priority <c>normal</c>. - </p> - <p>Other priorities than <c>normal</c> are normally not needed. - When other priorities are used, they need to be used - with care, especially the <c>high</c> priority <em>must</em> - be used with care. A process on <c>high</c> priority should - only perform work for short periods of time. Busy looping for - long periods of time in a <c>high</c> priority process will - most likely cause problems, since there are important servers - in OTP running on priority <c>normal</c>. - </p> - </item> - - <tag><c>process_flag(save_calls, N)</c></tag> - <item> - <p><c>N</c> must be an integer in the interval 0..10000. - If <c>N</c> > 0, call saving is made active for the - process, which means that information about the <c>N</c> - most recent global function calls, BIF calls, sends and - receives made by the process are saved in a list, which - can be retrieved with - <c>process_info(Pid, last_calls)</c>. A global function - call is one in which the module of the function is - explicitly mentioned. Only a fixed amount of information - is saved: a tuple <c>{Module, Function, Arity}</c> for - function calls, and the mere atoms <c>send</c>, - <c>'receive'</c> and <c>timeout</c> for sends and receives - (<c>'receive'</c> when a message is received and - <c>timeout</c> when a receive times out). If <c>N</c> = 0, - call saving is disabled for the process, which is the - default. Whenever the size of the call saving list is set, - its contents are reset.</p> - </item> - <tag><c>process_flag(sensitive, Boolean)</c></tag> - <item> - <p>Set or clear the <c>sensitive</c> flag for the current process. - When a process has been marked as sensitive by calling - <c>process_flag(sensitive, true)</c>, features in the run-time - system that can be used for examining the data and/or inner working - of the process are silently disabled.</p> - <p>Features that are disabled include (but are not limited to) - the following:</p> - <p>Tracing: Trace flags can still be set for the process, but no - trace messages of any kind will be generated. - (If the <c>sensitive</c> flag is turned off, trace messages will - again be generated if there are any trace flags set.)</p> - <p>Sequential tracing: The sequential trace token will be propagated - as usual, but no sequential trace messages will be generated.</p> - <p><c>process_info/1,2</c> cannot be used to read out the message - queue or the process dictionary (both will be returned as empty lists).</p> - <p>Stack back-traces cannot be displayed for the process.</p> - <p>In crash dumps, the stack, messages, and the process dictionary - will be omitted.</p> - <p>If <c>{save_calls,N}</c> has been set for the process, no - function calls will be saved to the call saving list. - (The call saving list will not be cleared; furthermore, send, receive, - and timeout events will still be added to the list.)</p> - </item> - </taglist> + <p>When <c>trap_exit</c> is set to <c>true</c>, exit signals + arriving to a process are converted to <c>{'EXIT', From, Reason}</c> messages, which can be received as ordinary + messages. If <c>trap_exit</c> is set to <c>false</c>, the + process exits if it receives an exit signal other than + <c>normal</c> and the exit signal is propagated to its + linked processes. Application processes should normally + not trap exits.</p> + <p>Returns the old value of the flag.</p> + <p>See also <seealso marker="#exit/2">exit/2</seealso>.</p> + </desc> + </func> + <func> + <name name="process_flag" arity="2" clause_i="2"/> + <fsummary>Set process flag error_handler for the calling process</fsummary> + <desc> + <p>This is used by a process to redefine the error handler + for undefined function calls and undefined registered + processes. Inexperienced users should not use this flag + since code auto-loading is dependent on the correct + operation of the error handling module.</p> + <p>Returns the old value of the flag.</p> + </desc> + </func> + <func> + <name name="process_flag" arity="2" clause_i="3"/> + <fsummary>Set process flag min_heap_size for the calling process</fsummary> + <desc> + <p>This changes the minimum heap size for the calling + process.</p> + <p>Returns the old value of the flag.</p> </desc> </func> <func> - <name>process_flag(Pid, Flag, Value) -> OldValue</name> + <name name="process_flag" arity="2" clause_i="4"/> + <fsummary>Set process flag min_bin_vheap_size for the calling process</fsummary> + <desc> + <p>This changes the minimum binary virtual heap size for the calling + process.</p> + <p>Returns the old value of the flag.</p> </desc> + </func> + <func> + <name name="process_flag" arity="2" clause_i="5"/> + <type name="priority_level"/> + <fsummary>Set process flag priority for the calling process</fsummary> + <desc> + <p><marker id="process_flag_priority"></marker> + This sets the process priority. <c><anno>Level</anno></c> is an atom. + There are currently four priority levels: <c>low</c>, + <c>normal</c>, <c>high</c>, and <c>max</c>. The default + priority level is <c>normal</c>. <em>NOTE</em>: The + <c>max</c> priority level is reserved for internal use in + the Erlang runtime system, and should <em>not</em> be used + by others. + </p> + <p>Internally in each priority level processes are scheduled + in a round robin fashion. + </p> + <p>Execution of processes on priority <c>normal</c> and + priority <c>low</c> will be interleaved. Processes on + priority <c>low</c> will be selected for execution less + frequently than processes on priority <c>normal</c>. + </p> + <p>When there are runnable processes on priority <c>high</c> + no processes on priority <c>low</c>, or <c>normal</c> will + be selected for execution. Note, however, that this does + <em>not</em> mean that no processes on priority <c>low</c>, + or <c>normal</c> will be able to run when there are + processes on priority <c>high</c> running. On the runtime + system with SMP support there might be more processes running + in parallel than processes on priority <c>high</c>, i.e., + a <c>low</c>, and a <c>high</c> priority process might + execute at the same time. + </p> + <p>When there are runnable processes on priority <c>max</c> + no processes on priority <c>low</c>, <c>normal</c>, or + <c>high</c> will be selected for execution. As with the + <c>high</c> priority, processes on lower priorities might + execute in parallel with processes on priority <c>max</c>. + </p> + <p>Scheduling is preemptive. Regardless of priority, a process + is preempted when it has consumed more than a certain amount + of reductions since the last time it was selected for + execution. + </p> + <p><em>NOTE</em>: You should not depend on the scheduling + to remain exactly as it is today. Scheduling, at least on + the runtime system with SMP support, is very likely to be + modified in the future in order to better utilize available + processor cores. + </p> + <p>There is currently <em>no</em> automatic mechanism for + avoiding priority inversion, such as priority inheritance, + or priority ceilings. When using priorities you have + to take this into account and handle such scenarios by + yourself. + </p> + <p>Making calls from a <c>high</c> priority process into code + that you don't have control over may cause the <c>high</c> + priority process to wait for a processes with lower + priority, i.e., effectively decreasing the priority of the + <c>high</c> priority process during the call. Even if this + isn't the case with one version of the code that you don't + have under your control, it might be the case in a future + version of it. This might, for example, happen if a + <c>high</c> priority process triggers code loading, since + the code server runs on priority <c>normal</c>. + </p> + <p>Other priorities than <c>normal</c> are normally not needed. + When other priorities are used, they need to be used + with care, especially the <c>high</c> priority <em>must</em> + be used with care. A process on <c>high</c> priority should + only perform work for short periods of time. Busy looping for + long periods of time in a <c>high</c> priority process will + most likely cause problems, since there are important servers + in OTP running on priority <c>normal</c>. + </p> + <p>Returns the old value of the flag.</p> + </desc> + </func> + <func> + <name name="process_flag" arity="2" clause_i="6"/> + <fsummary>Set process flag save_calls for the calling process</fsummary> + <desc> + <p><c><anno>N</anno></c> must be an integer in the interval 0..10000. + If <c><anno>N</anno></c> > 0, call saving is made active for the + process, which means that information about the <c><anno>N</anno></c> + most recent global function calls, BIF calls, sends and + receives made by the process are saved in a list, which + can be retrieved with + <c>process_info(Pid, last_calls)</c>. A global function + call is one in which the module of the function is + explicitly mentioned. Only a fixed amount of information + is saved: a tuple <c>{Module, Function, Arity}</c> for + function calls, and the mere atoms <c>send</c>, + <c>'receive'</c> and <c>timeout</c> for sends and receives + (<c>'receive'</c> when a message is received and + <c>timeout</c> when a receive times out). If <c>N</c> = 0, + call saving is disabled for the process, which is the + default. Whenever the size of the call saving list is set, + its contents are reset.</p> + <p>Returns the old value of the flag.</p> + </desc> + </func> + <func> + <name name="process_flag" arity="2" clause_i="7"/> + <fsummary>Set process flag sensitive for the calling process</fsummary> + <desc> + <p>Set or clear the <c>sensitive</c> flag for the current process. + When a process has been marked as sensitive by calling + <c>process_flag(sensitive, true)</c>, features in the run-time + system that can be used for examining the data and/or inner working + of the process are silently disabled.</p> + <p>Features that are disabled include (but are not limited to) + the following:</p> + <p>Tracing: Trace flags can still be set for the process, but no + trace messages of any kind will be generated. + (If the <c>sensitive</c> flag is turned off, trace messages will + again be generated if there are any trace flags set.)</p> + <p>Sequential tracing: The sequential trace token will be propagated + as usual, but no sequential trace messages will be generated.</p> + <p><c>process_info/1,2</c> cannot be used to read out the message + queue or the process dictionary (both will be returned as empty lists).</p> + <p>Stack back-traces cannot be displayed for the process.</p> + <p>In crash dumps, the stack, messages, and the process dictionary + will be omitted.</p> + <p>If <c>{save_calls,N}</c> has been set for the process, no + function calls will be saved to the call saving list. + (The call saving list will not be cleared; furthermore, send, receive, + and timeout events will still be added to the list.)</p> + <p>Returns the old value of the flag.</p> + </desc> + </func> + <func> + <name name="process_flag" arity="3"/> <fsummary>Set process flags for a process</fsummary> - <type> - <v>Pid = pid()</v> - <v>Flag, Value, OldValue -- see below</v> - </type> <desc> - <p>Sets certain flags for the process <c>Pid</c>, in the same + <p>Sets certain flags for the process <c><anno>Pid</anno></c>, in the same manner as <seealso marker="#process_flag/2">process_flag/2</seealso>. Returns the old value of the flag. The allowed values for - <c>Flag</c> are only a subset of those allowed in + <c><anno>Flag</anno></c> are only a subset of those allowed in <c>process_flag/2</c>, namely: <c>save_calls</c>.</p> - <p>Failure: <c>badarg</c> if <c>Pid</c> is not a local process.</p> + <p>Failure: <c>badarg</c> if <c><anno>Pid</anno></c> is not a local process.</p> </desc> </func> <func> - <name>process_info(Pid) -> InfoResult</name> + <name name="process_info" arity="1"/> + <type name="process_info_result_item"/> + <type name="priority_level"/> + <type name="stack_item"/> <fsummary>Information about a process</fsummary> - <type> - <v>Pid = pid()</v> - <v>Item = atom()</v> - <v>Info = term()</v> - <v>InfoTuple = {Item, Info}</v> - <v>InfoTupleList = [InfoTuple]</v> - <v>InfoResult = InfoTupleList | undefined</v> - </type> - <desc> - <p>Returns a list containing <c>InfoTuple</c>s with + <desc> + <p>Returns a list containing <c><anno>InfoTuple</anno></c>s with miscellaneous information about the process identified by <c>Pid</c>, or <c>undefined</c> if the process is not alive. </p> <p> - The order of the <c>InfoTuple</c>s is not defined, nor - are all the <c>InfoTuple</c>s mandatory. The <c>InfoTuple</c>s + The order of the <c><anno>InfoTuple</anno></c>s is not defined, nor + are all the <c><anno>InfoTuple</anno></c>s mandatory. The <c><anno>InfoTuple</anno></c>s part of the result may be changed without prior notice. - Currently <c>InfoTuple</c>s with the following <c>Item</c>s + Currently <c><anno>InfoTuple</anno></c>s with the following items are part of the result: <c>current_function</c>, <c>initial_call</c>, <c>status</c>, <c>message_queue_len</c>, <c>messages</c>, <c>links</c>, @@ -3857,12 +3397,12 @@ os_prompt% </pre> <c>priority</c>, <c>group_leader</c>, <c>total_heap_size</c>, <c>heap_size</c>, <c>stack_size</c>, <c>reductions</c>, and <c>garbage_collection</c>. - If the process identified by <c>Pid</c> has a registered name - also an <c>InfoTuple</c> with <c>Item == registered_name</c> + If the process identified by <c><anno>Pid</anno></c> has a registered name + also an <c><anno>InfoTuple</anno></c> with the item <c>registered_name</c> will appear. </p> <p>See <seealso marker="#process_info/2">process_info/2</seealso> - for information about specific <c>InfoTuple</c>s.</p> + for information about specific <c><anno>InfoTuple</anno></c>s.</p> <warning> <p>This BIF is intended for <em>debugging only</em>, use <seealso marker="#process_info/2">process_info/2</seealso> @@ -3873,113 +3413,108 @@ os_prompt% </pre> </desc> </func> <func> - <name>process_info(Pid, ItemSpec) -> InfoResult</name> + <name name="process_info" arity="2" clause_i="1"/> + <name name="process_info" arity="2" clause_i="2"/> + <type name="process_info_item"/> + <type name="process_info_result_item"/> + <type name="stack_item"/> + <type name="priority_level"/> <fsummary>Information about a process</fsummary> - <type> - <v>Pid = pid()</v> - <v>Item = atom()</v> - <v>Info = term()</v> - <v>ItemList = [Item]</v> - <v>ItemSpec = Item | ItemList</v> - <v>InfoTuple = {Item, Info}</v> - <v>InfoTupleList = [InfoTuple]</v> - <v>InfoResult = InfoTuple | InfoTupleList | undefined | []</v> - </type> - <desc> - <p>Returns information about the process identified by <c>Pid</c> - as specified by the <c>ItemSpec</c>, or <c>undefined</c> if the + <desc> + <p>Returns information about the process identified by <c><anno>Pid</anno></c> + as specified by the <c><anno>Item</anno></c> or the <c><anno>ItemList</anno></c>, or <c>undefined</c> if the process is not alive. </p> - <p>If the process is alive and <c>ItemSpec</c> is a single - <c>Item</c>, the returned value is the corresponding - <c>InfoTuple</c> unless <c>ItemSpec == registered_name</c> + <p>If the process is alive and a single <c><anno>Item</anno></c> is given, + the returned value is the corresponding + <c><anno>InfoTuple</anno></c> unless <c>Item =:= registered_name</c> and the process has no registered name. In this case <c>[]</c> is returned. This strange behavior is due to historical reasons, and is kept for backward compatibility. </p> - <p>If <c>ItemSpec</c> is an <c>ItemList</c>, the result is an - <c>InfoTupleList</c>. The <c>InfoTuple</c>s in the - <c>InfoTupleList</c> will appear with the corresponding - <c>Item</c>s in the same order as the <c>Item</c>s appeared - in the <c>ItemList</c>. Valid <c>Item</c>s may appear multiple - times in the <c>ItemList</c>. + <p>If an <c>ItemList</c> is given, the result is an + <c><anno>InfoTupleList</anno></c>. The <c><anno>InfoTuple</anno></c>s in the + <c><anno>InfoTupleList</anno></c> will appear with the corresponding + <c><anno>Item</anno></c>s in the same order as the <c><anno>Item</anno></c>s appeared + in the <c><anno>ItemList</anno></c>. Valid <c><anno>Item</anno></c>s may appear multiple + times in the <c><anno>ItemList</anno></c>. </p> - <note><p>If <c>registered_name</c> is part of an <c>ItemList</c> + <note><p>If <c>registered_name</c> is part of an <c><anno>ItemList</anno></c> and the process has no name registered a - <c>{registered_name, []}</c> <c>InfoTuple</c> <em>will</em> - appear in the resulting <c>InfoTupleList</c>. This - behavior is different than when - <c>ItemSpec == registered_name</c>, and than when + <c>{registered_name, []}</c> <c><anno>InfoTuple</anno></c> <em>will</em> + appear in the resulting <c><anno>InfoTupleList</anno></c>. This + behavior is different than when a single + <c>Item =:= registered_name</c> is given, and than when <c>process_info/1</c> is used. </p></note> - <p>Currently the following <c>InfoTuple</c>s with corresponding - <c>Item</c>s are valid:</p> + <p>Currently the following <c><anno>InfoTuple</anno></c>s with corresponding + <c><anno>Item</anno></c>s are valid:</p> <taglist> - <tag><c>{backtrace, Bin}</c></tag> + <tag><c>{backtrace, <anno>Bin</anno>}</c></tag> <item> - <p>The binary <c>Bin</c> contains the same information as + <p>The binary <c><anno>Bin</anno></c> contains the same information as the output from - <c>erlang:process_display(Pid, backtrace)</c>. Use + <c>erlang:process_display(<anno>Pid</anno>, backtrace)</c>. Use <c>binary_to_list/1</c> to obtain the string of characters from the binary.</p> </item> - <tag><c>{binary, BinInfo}</c></tag> + <tag><c>{binary, <anno>BinInfo</anno>}</c></tag> <item> - <p><c>BinInfo</c> is a list containing miscellaneous information + <p><c><anno>BinInfo</anno></c> is a list containing miscellaneous information about binaries currently being referred to by this process. - This <c>InfoTuple</c> may be changed or removed without prior + This <c><anno>InfoTuple</anno></c> may be changed or removed without prior notice.</p> </item> - <tag><c>{catchlevel, CatchLevel}</c></tag> + <tag><c>{catchlevel, <anno>CatchLevel</anno>}</c></tag> <item> - <p><c>CatchLevel</c> is the number of currently active - catches in this process. This <c>InfoTuple</c> may be + <p><c><anno>CatchLevel</anno></c> is the number of currently active + catches in this process. This <c><anno>InfoTuple</anno></c> may be changed or removed without prior notice.</p> </item> - <tag><c>{current_function, {Module, Function, Arity}}</c></tag> + <tag><c>{current_function, {<anno>Module</anno>, <anno>Function</anno>, <anno>Arity</anno>}}</c></tag> <item> - <p><c>Module</c>, <c>Function</c>, <c>Arity</c> is + <p><c><anno>Module</anno></c>, <c><anno>Function</anno></c>, <c><anno>Arity</anno></c> is the current function call of the process.</p> </item> - <tag><c>{current_location, {Module, Function, Arity, Location}}</c></tag> + <tag><c>{current_location, {<anno>Module</anno>, <anno>Function</anno>, <anno>Arity</anno>, <anno>Location</anno>}}</c></tag> <item> - <p><c>Module</c>, <c>Function</c>, <c>Arity</c> is + <p><c><anno>Module</anno></c>, <c><anno>Function</anno></c>, <c><anno>Arity</anno></c> is the current function call of the process. - <c>Location</c> is a list of two-tuples that describes the + <c><anno>Location</anno></c> is a list of two-tuples that describes the location in the source code. </p> </item> - <tag><c>{current_stacktrace, Stack}</c></tag> + <tag><c>{current_stacktrace, <anno>Stack</anno>}</c></tag> <item> <p>Return the current call stack back-trace (<em>stacktrace</em>) of the process. The stack has the same format as returned by <seealso marker="#get_stacktrace/0">erlang:get_stacktrace/0</seealso>. </p> </item> - <tag><c>{dictionary, Dictionary}</c></tag> + <tag><c>{dictionary, <anno>Dictionary</anno>}</c></tag> <item> - <p><c>Dictionary</c> is the dictionary of the process.</p> + <p><c><anno>Dictionary</anno></c> is the dictionary of the process.</p> </item> - <tag><c>{error_handler, Module}</c></tag> + <tag><c>{error_handler, <anno>Module</anno>}</c></tag> <item> - <p><c>Module</c> is the error handler module used by + <p><c><anno>Module</anno></c> is the error handler module used by the process (for undefined function calls, for example).</p> </item> - <tag><c>{garbage_collection, GCInfo}</c></tag> + <tag><c>{garbage_collection, <anno>GCInfo</anno>}</c></tag> <item> - <p><c>GCInfo</c> is a list which contains miscellaneous + <p><c><anno>GCInfo</anno></c> is a list which contains miscellaneous information about garbage collection for this process. - The content of <c>GCInfo</c> may be changed without + The content of <c><anno>GCInfo</anno></c> may be changed without prior notice.</p> </item> - <tag><c>{group_leader, GroupLeader}</c></tag> + <tag><c>{group_leader, <anno>GroupLeader</anno>}</c></tag> <item> - <p><c>GroupLeader</c> is group leader for the IO of + <p><c><anno>GroupLeader</anno></c> is group leader for the IO of the process.</p> </item> - <tag><c>{heap_size, Size}</c></tag> + <tag><c>{heap_size, <anno>Size</anno>}</c></tag> <item> - <p><c>Size</c> is the size in words of youngest heap generation + <p><c><anno>Size</anno></c> is the size in words of youngest heap generation of the process. This generation currently include the stack of the process. This information is highly implementation dependent, and may change if the implementation change. @@ -3991,9 +3526,9 @@ os_prompt% </pre> the initial function call with which the process was spawned.</p> </item> - <tag><c>{links, Pids}</c></tag> + <tag><c>{links, <anno>Pids</anno>}</c></tag> <item> - <p><c>Pids</c> is a list of pids, with processes to + <p><c><anno>Pids</anno></c> is a list of pids, with processes to which the process has a link.</p> </item> <tag><c>{last_calls, false|Calls}</c></tag> @@ -4004,131 +3539,131 @@ os_prompt% </pre> If call saving is active, a list is returned, in which the last element is the most recent called.</p> </item> - <tag><c>{memory, Size}</c></tag> + <tag><c>{memory, <anno>Size</anno>}</c></tag> <item> - <p><c>Size</c> is the size in bytes of the process. This + <p><c><anno>Size</anno></c> is the size in bytes of the process. This includes call stack, heap and internal structures.</p> </item> - <tag><c>{message_queue_len, MessageQueueLen}</c></tag> + <tag><c>{message_queue_len, <anno>MessageQueueLen</anno>}</c></tag> <item> - <p><c>MessageQueueLen</c> is the number of messages + <p><c><anno>MessageQueueLen</anno></c> is the number of messages currently in the message queue of the process. This is - the length of the list <c>MessageQueue</c> returned as + the length of the list <c><anno>MessageQueue</anno></c> returned as the info item <c>messages</c> (see below).</p> </item> - <tag><c>{messages, MessageQueue}</c></tag> + <tag><c>{messages, <anno>MessageQueue</anno>}</c></tag> <item> - <p><c>MessageQueue</c> is a list of the messages to + <p><c><anno>MessageQueue</anno></c> is a list of the messages to the process, which have not yet been processed.</p> </item> - <tag><c>{min_heap_size, MinHeapSize}</c></tag> + <tag><c>{min_heap_size, <anno>MinHeapSize</anno>}</c></tag> <item> - <p><c>MinHeapSize</c> is the minimum heap size for the process.</p> + <p><c><anno>MinHeapSize</anno></c> is the minimum heap size for the process.</p> </item> - <tag><c>{min_bin_vheap_size, MinBinVHeapSize}</c></tag> + <tag><c>{min_bin_vheap_size, <anno>MinBinVHeapSize</anno>}</c></tag> <item> - <p><c>MinBinVHeapSize</c> is the minimum binary virtual heap size for the process.</p> + <p><c><anno>MinBinVHeapSize</anno></c> is the minimum binary virtual heap size for the process.</p> </item> - <tag><c>{monitored_by, Pids}</c></tag> + <tag><c>{monitored_by, <anno>Pids</anno>}</c></tag> <item> <p>A list of pids that are monitoring the process (with <c>monitor/2</c>).</p> </item> - <tag><c>{monitors, Monitors}</c></tag> + <tag><c>{monitors, <anno>Monitors</anno>}</c></tag> <item> <p>A list of monitors (started by <c>monitor/2</c>) that are active for the process. For a local process monitor or a remote process monitor by pid, the list item - is <c>{process, Pid}</c>, and for a remote process + is <c>{process, <anno>Pid</anno>}</c>, and for a remote process monitor by name, the list item is - <c>{process, {RegName, Node}}</c>.</p> + <c>{process, {<anno>RegName</anno>, <anno>Node</anno>}}</c>.</p> </item> <tag><c>{priority, Level}</c></tag> <item> - <p><c>Level</c> is the current priority level for + <p><c><anno>Level</anno></c> is the current priority level for the process. For more information on priorities see <seealso marker="#process_flag_priority">process_flag(priority, Level)</seealso>.</p> </item> - <tag><c>{reductions, Number}</c></tag> + <tag><c>{reductions, <anno>Number</anno>}</c></tag> <item> - <p><c>Number</c> is the number of reductions executed by + <p><c><anno>Number</anno></c> is the number of reductions executed by the process.</p> </item> - <tag><c>{registered_name, Atom}</c></tag> + <tag><c>{registered_name, <anno>Atom</anno>}</c></tag> <item> - <p><c>Atom</c> is the registered name of the process. If + <p><c><anno>Atom</anno></c> is the registered name of the process. If the process has no registered name, this tuple is not present in the list.</p> </item> - <tag><c>{sequential_trace_token, [] | SequentialTraceToken}</c></tag> + <tag><c>{sequential_trace_token, [] | <anno>SequentialTraceToken</anno>}</c></tag> <item> - <p><c>SequentialTraceToken</c> the sequential trace token for - the process. This <c>InfoTuple</c> may be changed or removed + <p><c><anno>SequentialTraceToken</anno></c> the sequential trace token for + the process. This <c><anno>InfoTuple</anno></c> may be changed or removed without prior notice.</p> </item> - <tag><c>{stack_size, Size}</c></tag> + <tag><c>{stack_size, <anno>Size</anno>}</c></tag> <item> - <p><c>Size</c> is the stack size of the process in words.</p> + <p><c><anno>Size</anno></c> is the stack size of the process in words.</p> </item> - <tag><c>{status, Status}</c></tag> + <tag><c>{status, <anno>Status</anno>}</c></tag> <item> - <p><c>Status</c> is the status of the process. <c>Status</c> + <p><c><anno>Status</anno></c> is the status of the process. <c><anno>Status</anno></c> is <c>exiting</c>, <c>garbage_collecting</c>, <c>waiting</c> (for a message), <c>running</c>, <c>runnable</c> (ready to run, but another process is running), or <c>suspended</c> (suspended on a "busy" port or by the <c>erlang:suspend_process/[1,2]</c> BIF).</p> </item> - <tag><c>{suspending, SuspendeeList}</c></tag> + <tag><c>{suspending, <anno>SuspendeeList</anno>}</c></tag> <item> - <p><c>SuspendeeList</c> is a list of <c>{Suspendee, - ActiveSuspendCount, OutstandingSuspendCount}</c> tuples. - <c>Suspendee</c> is the pid of a process that have been or is to - be suspended by the process identified by <c>Pid</c> via the + <p><c><anno>SuspendeeList</anno></c> is a list of <c>{<anno>Suspendee</anno>, + <anno>ActiveSuspendCount</anno>, <anno>OutstandingSuspendCount</anno>}</c> tuples. + <c><anno>Suspendee</anno></c> is the pid of a process that have been or is to + be suspended by the process identified by <c><anno>Pid</anno></c> via the <seealso marker="#suspend_process/2">erlang:suspend_process/2</seealso> BIF, or the <seealso marker="#suspend_process/1">erlang:suspend_process/1</seealso> - BIF. <c>ActiveSuspendCount</c> is the number of times the - <c>Suspendee</c> has been suspended by <c>Pid</c>. - <c>OutstandingSuspendCount</c> is the number of not yet - completed suspend requests sent by <c>Pid</c>. That is, - if <c>ActiveSuspendCount /= 0</c>, <c>Suspendee</c> is + BIF. <c><anno>ActiveSuspendCount</anno></c> is the number of times the + <c><anno>Suspendee</anno></c> has been suspended by <c><anno>Pid</anno></c>. + <c><anno>OutstandingSuspendCount</anno></c> is the number of not yet + completed suspend requests sent by <c><anno>Pid</anno></c>. That is, + if <c><anno>ActiveSuspendCount</anno> =/= 0</c>, <c><anno>Suspendee</anno></c> is currently in the suspended state, and if - <c>OutstandingSuspendCount /= 0</c> the <c>asynchronous</c> + <c><anno>OutstandingSuspendCount</anno> =/= 0</c> the <c>asynchronous</c> option of <c>erlang:suspend_process/2</c> has been used and - the suspendee has not yet been suspended by <c>Pid</c>. - Note that the <c>ActiveSuspendCount</c> and - <c>OutstandingSuspendCount</c> are not the total suspend count - on <c>Suspendee</c>, only the parts contributed by <c>Pid</c>. + the suspendee has not yet been suspended by <c><anno>Pid</anno></c>. + Note that the <c><anno>ActiveSuspendCount</anno></c> and + <c><anno>OutstandingSuspendCount</anno></c> are not the total suspend count + on <c><anno>Suspendee</anno></c>, only the parts contributed by <c>Pid</c>. </p> </item> - <tag><c>{total_heap_size, Size}</c></tag> + <tag><c>{total_heap_size, <anno>Size</anno>}</c></tag> <item> - <p><c>Size</c> is the total size in words of all heap + <p><c><anno>Size</anno></c> is the total size in words of all heap fragments of the process. This currently include the stack of the process. </p> </item> - <tag><c>{trace, InternalTraceFlags}</c></tag> + <tag><c>{trace, <anno>InternalTraceFlags</anno>}</c></tag> <item> - <p><c>InternalTraceFlags</c> is an integer representing - internal trace flag for this process. This <c>InfoTuple</c> + <p><c><anno>InternalTraceFlags</anno></c> is an integer representing + internal trace flag for this process. This <c><anno>InfoTuple</anno></c> may be changed or removed without prior notice.</p> </item> - <tag><c>{trap_exit, Boolean}</c></tag> + <tag><c>{trap_exit, <anno>Boolean</anno>}</c></tag> <item> - <p><c>Boolean</c> is <c>true</c> if the process is trapping + <p><c><anno>Boolean</anno></c> is <c>true</c> if the process is trapping exits, otherwise it is <c>false</c>.</p> </item> </taglist> <p>Note however, that not all implementations support every one - of the above <c>Items</c>.</p> - <p>Failure: <c>badarg</c> if <c>Pid</c> is not a local process, - or if <c>Item</c> is not a valid <c>Item</c>.</p> + of the above <c><anno>Item</anno></c>s.</p> + <p>Failure: <c>badarg</c> if <c><anno>Pid</anno></c> is not a local process, + or if <c><anno>Item</anno></c> is not a valid <c><anno>Item</anno></c>.</p> </desc> </func> <func> - <name>processes() -> [pid()]</name> + <name name="processes" arity="0"/> <fsummary>All processes</fsummary> <desc> <p>Returns a list of process identifiers corresponding to @@ -4145,13 +3680,10 @@ os_prompt% </pre> </desc> </func> <func> - <name>purge_module(Module) -> void()</name> + <name name="purge_module" arity="1"/> <fsummary>Remove old code for a module</fsummary> - <type> - <v>Module = atom()</v> - </type> <desc> - <p>Removes old code for <c>Module</c>. Before this BIF is used, + <p>Removes old code for <c><anno>Module</anno></c>. Before this BIF is used, <c>erlang:check_process_code/2</c> should be called to check that no processes are executing old code in the module.</p> <warning> @@ -4160,20 +3692,17 @@ os_prompt% </pre> used elsewhere.</p> </warning> <p>Failure: <c>badarg</c> if there is no old code for - <c>Module</c>.</p> + <c><anno>Module</anno></c>.</p> </desc> </func> <func> - <name>put(Key, Val) -> OldVal | undefined</name> + <name name="put" arity="2"/> <fsummary>Add a new value to the process dictionary</fsummary> - <type> - <v>Key = Val = OldVal = term()</v> - </type> - <desc> - <p>Adds a new <c>Key</c> to the process dictionary, associated - with the value <c>Val</c>, and returns <c>undefined</c>. If - <c>Key</c> already exists, the old value is deleted and - replaced by <c>Val</c> and the function returns the old value.</p> + <desc> + <p>Adds a new <c><anno>Key</anno></c> to the process dictionary, associated + with the value <c><anno>Val</anno></c>, and returns <c>undefined</c>. If + <c><anno>Key</anno></c> already exists, the old value is deleted and + replaced by <c><anno>Val</anno></c> and the function returns the old value.</p> <note> <p>The values stored when <c>put</c> is evaluated within the scope of a <c>catch</c> will not be retracted if a @@ -4187,17 +3716,9 @@ os_prompt% </pre> </desc> </func> <func> - <name>erlang:raise(Class, Reason, Stacktrace)</name> + <name name="raise" arity="3"/> + <type name="raise_stacktrace"/> <fsummary>Stop execution with an exception of given class, reason and call stack backtrace</fsummary> - <type> - <v>Class = error | exit | throw</v> - <v>Reason = term()</v> - <v>Stacktrace = [{Module, Function, Arity | Args} | {Fun, Args}]</v> - <v> Module = Function = atom()</v> - <v> Arity = arity()</v> - <v> Args = [term()]</v> - <v> Fun = [fun()]</v> - </type> <desc> <p>Stops the execution of the calling process with an exception of given class, reason and call stack backtrace @@ -4208,11 +3729,11 @@ os_prompt% </pre> be avoided in applications, unless you know very well what you are doing.</p> </warning> - <p><c>Class</c> is one of <c>error</c>, <c>exit</c> or + <p><c><anno>Class</anno></c> is one of <c>error</c>, <c>exit</c> or <c>throw</c>, so if it were not for the stacktrace - <c>erlang:raise(Class, Reason, Stacktrace)</c> is - equivalent to <c>erlang:Class(Reason)</c>. - <c>Reason</c> is any term and <c>Stacktrace</c> is a list as + <c>erlang:raise(<anno>Class</anno>, <anno>Reason</anno>, <anno>Stacktrace</anno>)</c> is + equivalent to <c>erlang:<anno>Class</anno>(<anno>Reason</anno>)</c>. + <c><anno>Reason</anno></c> is any term and <c><anno>Stacktrace</anno></c> is a list as returned from <c>get_stacktrace()</c>, that is a list of 4-tuples <c>{Module, Function, Arity | Args, Location}</c> where <c>Module</c> and <c>Function</c> @@ -4229,24 +3750,21 @@ os_prompt% </pre> terminate, it has no return value - unless the arguments are invalid, in which case the function <em>returns the error reason</em>, that is <c>badarg</c>. If you want to be really sure not to return you can call - <c>error(erlang:raise(Class, Reason, Stacktrace))</c> + <c>error(erlang:raise(<anno>Class</anno>, <anno>Reason</anno>, <anno>Stacktrace</anno>))</c> and hope to distinguish exceptions later.</p> </desc> </func> <func> - <name>erlang:read_timer(TimerRef) -> integer() >= 0 | false</name> + <name name="read_timer" arity="1"/> <fsummary>Number of milliseconds remaining for a timer</fsummary> - <type> - <v>TimerRef = reference()</v> - </type> <desc> - <p><c>TimerRef</c> is a timer reference returned by + <p><c><anno>TimerRef</anno></c> is a timer reference returned by <seealso marker="#send_after/3">erlang:send_after/3</seealso> or <seealso marker="#start_timer/3">erlang:start_timer/3</seealso>. If the timer is active, the function returns the time in milliseconds left until the timer will expire, otherwise - <c>false</c> (which means that <c>TimerRef</c> was never a + <c>false</c> (which means that <c><anno>TimerRef</anno></c> was never a timer, that it has been cancelled, or that it has already delivered its message).</p> <p>See also @@ -4257,14 +3775,11 @@ os_prompt% </pre> </desc> </func> <func> - <name>erlang:ref_to_list(Ref) -> string()</name> + <name name="ref_to_list" arity="1"/> <fsummary>Text representation of a reference</fsummary> - <type> - <v>Ref = reference()</v> - </type> <desc> <p>Returns a string which corresponds to the text - representation of <c>Ref</c>.</p> + representation of <c><anno>Ref</anno></c>.</p> <warning> <p>This BIF is intended for debugging and for use in the Erlang operating system. It should not be used in @@ -4273,33 +3788,25 @@ os_prompt% </pre> </desc> </func> <func> - <name>register(RegName, Pid | Port) -> true</name> + <name name="register" arity="2"/> <fsummary>Register a name for a pid (or port)</fsummary> - <type> - <v>RegName = atom()</v> - <v>Pid = pid()</v> - <v>Port = port()</v> - </type> - <desc> - <p>Associates the name <c>RegName</c> with a pid or a port - identifier. <c>RegName</c>, which must be an atom, can be used + <desc> + <p>Associates the name <c><anno>RegName</anno></c> with a pid or a port + identifier. <c><anno>RegName</anno></c>, which must be an atom, can be used instead of the pid / port identifier in the send operator - (<c>RegName ! Message</c>).</p> + (<c><anno>RegName</anno> ! Message</c>).</p> <pre> > <input>register(db, Pid).</input> true</pre> - <p>Failure: <c>badarg</c> if <c>Pid</c> is not an existing, - local process or port, if <c>RegName</c> is already in use, + <p>Failure: <c>badarg</c> if <c><anno>PidOrPort</anno></c> is not an existing, + local process or port, if <c><anno>RegName</anno></c> is already in use, if the process or port is already registered (already has a - name), or if <c>RegName</c> is the atom <c>undefined</c>.</p> + name), or if <c><anno>RegName</anno></c> is the atom <c>undefined</c>.</p> </desc> </func> <func> - <name>registered() -> [RegName]</name> + <name name="registered" arity="0"/> <fsummary>All registered names</fsummary> - <type> - <v>RegName = atom()</v> - </type> <desc> <p>Returns a list of names which have been registered using <seealso marker="#register/2">register/2</seealso>.</p> @@ -4309,22 +3816,19 @@ true</pre> </desc> </func> <func> - <name>erlang:resume_process(Suspendee) -> true</name> + <name name="resume_process" arity="1"/> <fsummary>Resume a suspended process</fsummary> - <type> - <v>Suspendee = pid()</v> - </type> <desc> <p>Decreases the suspend count on the process identified by - <c>Suspendee</c>. <c>Suspendee</c> should previously have been + <c><anno>Suspendee</anno></c>. <c><anno>Suspendee</anno></c> should previously have been suspended via <seealso marker="#suspend_process/2">erlang:suspend_process/2</seealso>, or <seealso marker="#suspend_process/1">erlang:suspend_process/1</seealso> - by the process calling <c>erlang:resume_process(Suspendee)</c>. When - the suspend count on <c>Suspendee</c> reach zero, <c>Suspendee</c> + by the process calling <c>erlang:resume_process(<anno>Suspendee</anno>)</c>. When + the suspend count on <c><anno>Suspendee</anno></c> reach zero, <c><anno>Suspendee</anno></c> will be resumed, i.e., the state of the <c>Suspendee</c> is changed - from suspended into the state <c>Suspendee</c> was in before it was + from suspended into the state <c><anno>Suspendee</anno></c> was in before it was suspended. </p> <warning> @@ -4334,29 +3838,26 @@ true</pre> <taglist> <tag><c>badarg</c></tag> <item> - If <c>Suspendee</c> isn't a process identifier. + If <c><anno>Suspendee</anno></c> isn't a process identifier. </item> <tag><c>badarg</c></tag> <item> If the process calling <c>erlang:resume_process/1</c> had not previously increased the suspend count on the process - identified by <c>Suspendee</c>. + identified by <c><anno>Suspendee</anno></c>. </item> <tag><c>badarg</c></tag> <item> - If the process identified by <c>Suspendee</c> is not alive. + If the process identified by <c><anno>Suspendee</anno></c> is not alive. </item> </taglist> </desc> </func> <func> - <name>round(Number) -> integer()</name> + <name name="round" arity="1"/> <fsummary>Return an integer by rounding a number</fsummary> - <type> - <v>Number = number()</v> - </type> <desc> - <p>Returns an integer by rounding <c>Number</c>.</p> + <p>Returns an integer by rounding <c><anno>Number</anno></c>.</p> <pre> > <input>round(5.5).</input> 6</pre> @@ -4364,7 +3865,7 @@ true</pre> </desc> </func> <func> - <name>self() -> pid()</name> + <name name="self" arity="0"/> <fsummary>Pid of the calling process</fsummary> <desc> <p>Returns the pid (process identifier) of the calling process.</p> @@ -4375,33 +3876,21 @@ true</pre> </desc> </func> <func> - <name>erlang:send(Dest, Msg) -> Msg</name> + <name name="send" arity="2"/> <fsummary>Send a message</fsummary> - <type> - <v>Dest = pid() | port() | RegName | {RegName, Node}</v> - <v>Msg = term()</v> - <v> RegName = atom()</v> - <v> Node = node()</v> - </type> - <desc> - <p>Sends a message and returns <c>Msg</c>. This is the same as - <c>Dest ! Msg</c>.</p> - <p><c>Dest</c> may be a remote or local pid, a (local) port, a - locally registered name, or a tuple <c>{RegName, Node}</c> + <type name="dst"/> + <desc> + <p>Sends a message and returns <c><anno>Msg</anno></c>. This is the same as + <c><anno>Dest</anno> ! <anno>Msg</anno></c>.</p> + <p><c><anno>Dest</anno></c> may be a remote or local pid, a (local) port, a + locally registered name, or a tuple <c>{<anno>RegName</anno>, <anno>Node</anno>}</c> for a registered name at another node.</p> </desc> </func> <func> - <name>erlang:send(Dest, Msg, [Option]) -> Res</name> + <name name="send" arity="3"/> + <type name="dst"/> <fsummary>Send a message conditionally</fsummary> - <type> - <v>Dest = pid() | port() | RegName | {RegName, Node}</v> - <v> RegName = atom()</v> - <v> Node = node()</v> - <v>Msg = term()</v> - <v>Option = nosuspend | noconnect</v> - <v>Res = ok | nosuspend | noconnect</v> - </type> <desc> <p>Sends a message and returns <c>ok</c>, or does not send the message but returns something else (see below). Otherwise @@ -4431,28 +3920,24 @@ true</pre> </desc> </func> <func> - <name>erlang:send_after(Time, Dest, Msg) -> TimerRef</name> + <name name="send_after" arity="3"/> + <type_desc variable="Time">0 <= Time <= 4294967295</type_desc> <fsummary>Start a timer</fsummary> - <type> - <v>Time = integer() >= 0</v> - <v> 0 <= Time <= 4294967295</v> - <v>Dest = pid() | RegName </v> - <v> LocalPid = pid() (of a process, alive or dead, on the local node)</v> - <v>Msg = term()</v> - <v>TimerRef = reference()</v> - </type> <desc> <p>Starts a timer which will send the message <c>Msg</c> - to <c>Dest</c> after <c>Time</c> milliseconds.</p> - <p>If <c>Dest</c> is an atom, it is supposed to be the name of + to <c><anno>Dest</anno></c> after <c><anno>Time</anno></c> milliseconds.</p> + <p>If <c><anno>Dest</anno></c> is a <c>pid()</c> it has to be a <c>pid()</c> of a local process, dead or alive.</p> + <p>The <c><anno>Time</anno></c> value can, in the current implementation, not be greater than 4294967295.</p> + <p>If <c><anno>Dest</anno></c> is an <c>atom()</c>, it is supposed to be the name of a registered process. The process referred to by the name is looked up at the time of delivery. No error is given if the name does not refer to a process.</p> - <p>If <c>Dest</c> is a pid, the timer will be automatically - canceled if the process referred to by the pid is not alive, + + <p>If <c><anno>Dest</anno></c> is a <c>pid()</c>, the timer will be automatically + canceled if the process referred to by the <c>pid()</c> is not alive, or when the process exits. This feature was introduced in erts version 5.4.11. Note that timers will not be - automatically canceled when <c>Dest</c> is an atom.</p> + automatically canceled when <c><anno>Dest</anno></c> is an <c>atom</c>.</p> <p>See also <seealso marker="#start_timer/3">erlang:start_timer/3</seealso>, <seealso marker="#cancel_timer/1">erlang:cancel_timer/1</seealso>, @@ -4552,32 +4037,25 @@ true</pre> </desc> </func> <func> - <name>setelement(Index, Tuple1, Value) -> Tuple2</name> + <name name="setelement" arity="3"/> + <type_desc variable="Index">1..tuple_size(<anno>Tuple1</anno>)</type_desc> <fsummary>Set Nth element of a tuple</fsummary> - <type> - <v>Index = 1..tuple_size(Tuple1)</v> - <v>Tuple1 = Tuple2 = tuple()</v> - <v>Value = term()</v> - </type> - <desc> - <p>Returns a tuple which is a copy of the argument <c>Tuple1</c> - with the element given by the integer argument <c>Index</c> + <desc> + <p>Returns a tuple which is a copy of the argument <c><anno>Tuple1</anno></c> + with the element given by the integer argument <c><anno>Index</anno></c> (the first element is the element with index 1) replaced by - the argument <c>Value</c>.</p> + the argument <c><anno>Value</anno></c>.</p> <pre> > <input>setelement(2, {10, green, bottles}, red).</input> {10,red,bottles}</pre> </desc> </func> <func> - <name>size(Item) -> integer() >= 0</name> + <name name="size" arity="1"/> <fsummary>Size of a tuple or binary</fsummary> - <type> - <v>Item = tuple() | binary()</v> - </type> <desc> <p>Returns an integer which is the size of the argument - <c>Item</c>, which must be either a tuple or a binary.</p> + <c><anno>Item</anno></c>, which must be either a tuple or a binary.</p> <pre> > <input>size({morni, mulle, bwange}).</input> 3</pre> @@ -4605,20 +4083,16 @@ true</pre> </desc> </func> <func> - <name>spawn(Module, Function, Args) -> pid()</name> + <name name="spawn" arity="3"/> <fsummary>Create a new process with a function as entry point</fsummary> - <type> - <v>Module = Function = atom()</v> - <v>Args = [term()]</v> - </type> <desc> <p>Returns the pid of a new process started by the application - of <c>Module:Function</c> to <c>Args</c>. The new process + of <c><anno>Module</anno>:<anno>Function</anno></c> to <c><anno>Args</anno></c>. The new process created will be placed in the system scheduler queue and be run some time later.</p> - <p><c>error_handler:undefined_function(Module, Function, Args)</c> is evaluated by the new process if - <c>Module:Function/Arity</c> does not exist (where - <c>Arity</c> is the length of <c>Args</c>). The error handler + <p><c>error_handler:undefined_function(<anno>Module</anno>, <anno>Function</anno>, <anno>Args</anno>)</c> is evaluated by the new process if + <c><anno>Module</anno>:<anno>Function</anno>/Arity</c> does not exist (where + <c>Arity</c> is the length of <c><anno>Args</anno></c>). The error handler can be redefined (see <seealso marker="#process_flag/2">process_flag/2</seealso>). If <c>error_handler</c> is undefined, or the user has @@ -4665,15 +4139,11 @@ true</pre> </desc> </func> <func> - <name>spawn_link(Module, Function, Args) -> pid()</name> + <name name="spawn_link" arity="3"/> <fsummary>Create and link to a new process with a function as entry point</fsummary> - <type> - <v>Module = Function = atom()</v> - <v>Args = [term()]</v> - </type> <desc> <p>Returns the pid of a new process started by the application - of <c>Module:Function</c> to <c>Args</c>. A link is created + of <c><anno>Module</anno>:<anno>Function</anno></c> to <c><anno>Args</anno></c>. A link is created between the calling process and the new process, atomically. Otherwise works like <seealso marker="#spawn/3">spawn/3</seealso>.</p> @@ -4852,15 +4322,12 @@ true</pre> </desc> </func> <func> - <name>split_binary(Bin, Pos) -> {Bin1, Bin2}</name> + <name name="split_binary" arity="2"/> + <type_desc variable="Pos">0..byte_size(Bin)</type_desc> <fsummary>Split a binary into two</fsummary> - <type> - <v>Bin = Bin1 = Bin2 = binary()</v> - <v>Pos = 0..byte_size(Bin)</v> - </type> <desc> <p>Returns a tuple containing the binaries which are the result - of splitting <c>Bin</c> into two parts at position <c>Pos</c>. + of splitting <c><anno>Bin</anno></c> into two parts at position <c><anno>Pos</anno></c>. This is not a destructive operation. After the operation, there will be three binaries altogether.</p> <pre> @@ -4877,30 +4344,24 @@ true</pre> </desc> </func> <func> - <name>erlang:start_timer(Time, Dest, Msg) -> TimerRef</name> + <name name="start_timer" arity="3"/> + <type_desc variable="Time">0 <= Time <= 4294967295</type_desc> <fsummary>Start a timer</fsummary> - <type> - <v>Time = integer() >= 0</v> - <v> 0 <= Time <= 4294967295</v> - <v>Dest = LocalPid | RegName </v> - <v> LocalPid = pid() (of a process, alive or dead, on the local node)</v> - <v> RegName = atom()</v> - <v>Msg = term()</v> - <v>TimerRef = reference()</v> - </type> <desc> <p>Starts a timer which will send the message - <c>{timeout, TimerRef, Msg}</c> to <c>Dest</c> - after <c>Time</c> milliseconds.</p> - <p>If <c>Dest</c> is an atom, it is supposed to be the name of + <c>{timeout, <anno>TimerRef</anno>, <anno>Msg</anno>}</c> to <c><anno>Dest</anno></c> + after <c><anno>Time</anno></c> milliseconds.</p> + <p>If <c><anno>Dest</anno></c> is a <c>pid()</c> it has to be a <c>pid()</c> of a local process, dead or alive.</p> + <p>The <c><anno>Time</anno></c> value can, in the current implementation, not be greater than 4294967295.</p> + <p>If <c><anno>Dest</anno></c> is an <c>atom()</c>, it is supposed to be the name of a registered process. The process referred to by the name is looked up at the time of delivery. No error is given if the name does not refer to a process.</p> - <p>If <c>Dest</c> is a pid, the timer will be automatically - canceled if the process referred to by the pid is not alive, + <p>If <c><anno>Dest</anno></c> is a <c>pid()</c>, the timer will be automatically + canceled if the process referred to by the <c>pid()</c> is not alive, or when the process exits. This feature was introduced in erts version 5.4.11. Note that timers will not be - automatically canceled when <c>Dest</c> is an atom.</p> + automatically canceled when <c><anno>Dest</anno></c> is an <c>atom()</c>.</p> <p>See also <seealso marker="#send_after/3">erlang:send_after/3</seealso>, <seealso marker="#cancel_timer/1">erlang:cancel_timer/1</seealso>, @@ -4911,54 +4372,52 @@ true</pre> </desc> </func> <func> - <name>statistics(Type) -> Res</name> - <fsummary>Information about the system</fsummary> - <type> - <v>Type, Res -- see below</v> - </type> + <name name="statistics" arity="1" clause_i="1"/> + <fsummary>Information about context switches</fsummary> <desc> - <p>All times are in milliseconds unless otherwise specified.</p> - <p>Returns information about the system as specified by - <c>Type</c>:</p> - <taglist> - <tag><c>context_switches</c></tag> - <item> - <p>Returns <c>{ContextSwitches, 0}</c>, where - <c>ContextSwitches</c> is the total number of context - switches since the system started.</p> - </item> - <tag><marker id="statistics_exact_reductions"><c>exact_reductions</c></marker></tag> - <item> - <p>Returns - <c>{Total_Exact_Reductions, Exact_Reductions_Since_Last_Call}</c>.</p> - <note><p><c>statistics(exact_reductions)</c> is - a more expensive operation than - <seealso marker="#statistics_reductions">statistics(reductions)</seealso> - especially on an Erlang machine with SMP support.</p> - </note> - </item> - <tag><c>garbage_collection</c></tag> - <item> - <p>Returns <c>{Number_of_GCs, Words_Reclaimed, 0}</c>. This - information may not be valid for all implementations.</p> - <pre> + <p><c><anno>ContextSwitches</anno></c> is the total number of context + switches since the system started.</p> + </desc> + </func> + <func> + <name name="statistics" arity="1" clause_i="2"/> + <fsummary>Information about exact reductions</fsummary> + <desc> + <marker id="statistics_exact_reductions"></marker> + <note><p><c>statistics(exact_reductions)</c> is + a more expensive operation than + <seealso marker="#statistics_reductions">statistics(reductions)</seealso> + especially on an Erlang machine with SMP support.</p> + </note> + </desc> + </func> + <func> + <name name="statistics" arity="1" clause_i="3"/> + <fsummary>Information about garbage collection</fsummary> + <desc> + <p>This information may not be valid for all implementations.</p> + <pre> > <input>statistics(garbage_collection).</input> {85,23961,0} </pre> - </item> - <tag><c>io</c></tag> - <item> - <p>Returns <c>{{input, Input}, {output, Output}}</c>, - where <c>Input</c> is the total number of bytes received - through ports, and <c>Output</c> is the total number of - bytes output to ports.</p> - </item> - <tag><marker id="statistics_reductions"><c>reductions</c></marker></tag> - <item> - <p>Returns - <c>{Total_Reductions, Reductions_Since_Last_Call}</c>.</p> + </desc> + </func> + <func> + <name name="statistics" arity="1" clause_i="4"/> + <fsummary>Information about io</fsummary> + <desc> + <p><c><anno>Input</anno></c> is the total number of bytes received + through ports, and <c><anno>Output</anno></c> is the total number of + bytes output to ports.</p> + </desc> + </func> + <func> + <name name="statistics" arity="1" clause_i="5"/> + <fsummary>Information about reductions</fsummary> + <desc> + <marker id="statistics_reductions"></marker> <note> - <p>From erts version 5.5 (OTP release R11B) + <p>Since erts-5.5 (OTP release R11B) this value does not include reductions performed in current time slices of currently scheduled processes. If an exact value is wanted, use @@ -4968,53 +4427,65 @@ true</pre> > <input>statistics(reductions).</input> {2046,11} </pre> - </item> - <tag><c>run_queue</c></tag> - <item> - <p>Returns the length of the run queue, that is, the number - of processes that are ready to run.</p> - </item> - <tag><c>runtime</c></tag> - <item> - <p>Returns <c>{Total_Run_Time, Time_Since_Last_Call}</c>. - Note that the run-time is the sum of the run-time for all - threads in the Erlang run-time system and may therefore be greater - than the wall-clock time.</p> + </desc> + </func> + <func> + <name name="statistics" arity="1" clause_i="6"/> + <fsummary>Information about the run-queue</fsummary> + <desc> + <p>Returns the length of the run queue, that is, the number + of processes that are ready to run.</p> + </desc> + </func> + <func> + <name name="statistics" arity="1" clause_i="7"/> + <fsummary>Information about run-time</fsummary> + <desc> + <p>Note that the run-time is the sum of the run-time for all + threads in the Erlang run-time system and may therefore be greater + than the wall-clock time.</p> <pre> > <input>statistics(runtime).</input> {1690,1620} </pre> - </item> - <tag><marker id="statistics_scheduler_wall_time"><c>scheduler_wall_time</c></marker></tag> - <item> - <p>Returns a list of tuples with - <c>{SchedulerId, ActiveTime, TotalTime}</c>, where <c>SchedulerId</c> is an integer id of the scheduler, <c>ActiveTime</c> is - the duration the scheduler has been busy, <c>TotalTime</c> is the total time duration since - <seealso marker="#system_flag_scheduler_wall_time">scheduler_wall_time</seealso> - activation. The time unit is not defined and may be subject to change - between releases, operating systems and system restarts. - <c>scheduler_wall_time</c> should only be used to calculate relative - values for scheduler-utilization. <c>ActiveTime</c> can never exceed <c>TotalTime</c>. - </p> + </desc> + </func> + <func> + <name name="statistics" arity="1" clause_i="8"/> + <fsummary>Information about each schedulers work time</fsummary> + <desc> + <marker id="statistics_scheduler_wall_time"></marker> + <p> + Returns a list of tuples with <c>{<anno>SchedulerId</anno>, + <anno>ActiveTime</anno>, <anno>TotalTime</anno>}</c>, where + <c>SchedulerId</c> is an integer id of the scheduler, <c>ActiveTime</c> is + the duration the scheduler has been busy, <c>TotalTime</c> is the total time duration since + <seealso marker="#system_flag_scheduler_wall_time">scheduler_wall_time</seealso> + activation. The time unit is not defined and may be subject to change + between releases, operating systems and system restarts. + <c>scheduler_wall_time</c> should only be used to calculate relative + values for scheduler-utilization. <c>ActiveTime</c> can never exceed <c>TotalTime</c>. + </p> - <p>The definition of a busy scheduler is when it is not idle or not - scheduling (selecting) a process or port, meaning; executing process - code, executing linked-in-driver or NIF code, executing - built-in-functions or any other runtime handling, garbage collecting - or handling any other memory management. Note, a scheduler may also be - busy even if the operating system has scheduled out the scheduler - thread. - </p> + <p>The definition of a busy scheduler is when it is not idle or not + scheduling (selecting) a process or port, meaning; executing process + code, executing linked-in-driver or NIF code, executing + built-in-functions or any other runtime handling, garbage collecting + or handling any other memory management. Note, a scheduler may also be + busy even if the operating system has scheduled out the scheduler + thread. + </p> - <p> - Returns <c>undefined</c> if the system flag <seealso marker="#system_flag_scheduler_wall_time"> - scheduler_wall_time</seealso> is turned off. - </p> + <p> + Returns <c>undefined</c> if the system flag + <seealso marker="#system_flag_scheduler_wall_time">scheduler_wall_time</seealso> + is turned off. + </p> - <p>The list of scheduler information is unsorted and may appear in different order - between calls. - </p> - <p>Using <c>scheduler_wall_time</c> to calculate scheduler utilization.</p> + <p>The list of scheduler information is unsorted and may appear in different order + between calls. + </p> + <p>Using <c>scheduler_wall_time</c> to calculate scheduler utilization.</p> <pre> > <input>erlang:system_flag(scheduler_wall_time, true).</input> false @@ -5042,34 +4513,26 @@ ok {Ai + (A1 - A0), Ti + (T1 - T0)} end, {0, 0}, lists:zip(Ts0,Ts1)), A/T.</input> 0.9769136803764825 </pre> - <note> <p><c>scheduler_wall_time</c> is by default disabled. Use <c>erlang:system_flag(scheduler_wall_time, true)</c> to enable it. </p> </note> - </item> - - <tag><c>wall_clock</c></tag> - <item> - <p>Returns - <c>{Total_Wallclock_Time, Wallclock_Time_Since_Last_Call}</c>. - <c>wall_clock</c> can be used in the same manner as - <c>runtime</c>, except that real time is measured as - opposed to runtime or CPU time.</p> - </item> - </taglist> </desc> </func> <func> - <name>erlang:suspend_process(Suspendee, OptList) -> boolean()</name> + <name name="statistics" arity="1" clause_i="9"/> + <fsummary>Information about wall-clock</fsummary> + <desc> + <p><c>wall_clock</c> can be used in the same manner as + <c>runtime</c>, except that real time is measured as + opposed to runtime or CPU time.</p> + </desc> + </func> + <func> + <name name="suspend_process" arity="2"/> <fsummary>Suspend a process</fsummary> - <type> - <v>Suspendee = pid()</v> - <v>OptList = [Opt]</v> - <v>Opt = atom()</v> - </type> <desc> <p>Increases the suspend count on the process identified by - <c>Suspendee</c> and puts it in the suspended state if it isn't + <c><anno>Suspendee</anno></c> and puts it in the suspended state if it isn't already in the suspended state. A suspended process will not be scheduled for execution until the process has been resumed. </p> @@ -5077,49 +4540,49 @@ ok <p>A process can be suspended by multiple processes and can be suspended multiple times by a single process. A suspended process will not leave the suspended state until its suspend - count reach zero. The suspend count of <c>Suspendee</c> is - decreased when - <seealso marker="#resume_process/1">erlang:resume_process(Suspendee)</seealso> + count reach zero. The suspend count of <c><anno>Suspendee</anno></c> + is decreased when + <seealso marker="#resume_process/1">erlang:resume_process(<anno>Suspendee</anno>)</seealso> is called by the same process that called - <c>erlang:suspend_process(Suspendee)</c>. All increased suspend + <c>erlang:suspend_process(<anno>Suspendee</anno>)</c>. All increased suspend counts on other processes acquired by a process will automatically be decreased when the process terminates.</p> - <p>Currently the following options (<c>Opt</c>s) are available:</p> + <p>Currently the following options (<c><anno>Opt</anno></c>s) are available:</p> <taglist> <tag><c>asynchronous</c></tag> <item> A suspend request is sent to the process identified by - <c>Suspendee</c>. <c>Suspendee</c> will eventually suspend + <c><anno>Suspendee</anno></c>. <c><anno>Suspendee</anno></c> will eventually suspend unless it is resumed before it was able to suspend. The caller of <c>erlang:suspend_process/2</c> will return immediately, - regardless of whether the <c>Suspendee</c> has suspended yet - or not. Note that the point in time when the <c>Suspendee</c> + regardless of whether the <c><anno>Suspendee</anno></c> has suspended yet + or not. Note that the point in time when the <c><anno>Suspendee</anno></c> will actually suspend cannot be deduced from other events in the system. The only guarantee given is that the - <c>Suspendee</c> will <em>eventually</em> suspend (unless it + <c><anno>Suspendee</anno></c> will <em>eventually</em> suspend (unless it is resumed). If the <c>asynchronous</c> option has <em>not</em> been passed, the caller of <c>erlang:suspend_process/2</c> will - be blocked until the <c>Suspendee</c> has actually suspended. + be blocked until the <c><anno>Suspendee</anno></c> has actually suspended. </item> <tag><c>unless_suspending</c></tag> <item> - The process identified by <c>Suspendee</c> will be suspended + The process identified by <c><anno>Suspendee</anno></c> will be suspended unless the calling process already is suspending the - <c>Suspendee</c>. If <c>unless_suspending</c> is combined + <c><anno>Suspendee</anno></c>. If <c>unless_suspending</c> is combined with the <c>asynchronous</c> option, a suspend request will be sent unless the calling process already is suspending the - <c>Suspendee</c> or if a suspend request already has been sent + <c><anno>Suspendee</anno></c> or if a suspend request already has been sent and is in transit. If the calling process already is suspending - the <c>Suspendee</c>, or if combined with the <c>asynchronous</c> + the <c><anno>Suspendee</anno></c>, or if combined with the <c>asynchronous</c> option and a send request already is in transit, - <c>false</c> is returned and the suspend count on <c>Suspendee</c> + <c>false</c> is returned and the suspend count on <c><anno>Suspendee</anno></c> will remain unchanged. </item> </taglist> <p>If the suspend count on the process identified by - <c>Suspendee</c> was increased, <c>true</c> is returned; otherwise, + <c><anno>Suspendee</anno></c> was increased, <c>true</c> is returned; otherwise, <c>false</c> is returned.</p> <warning> @@ -5129,28 +4592,28 @@ ok <taglist> <tag><c>badarg</c></tag> <item> - If <c>Suspendee</c> isn't a process identifier. + If <c><anno>Suspendee</anno></c> isn't a process identifier. </item> <tag><c>badarg</c></tag> <item> - If the process identified by <c>Suspendee</c> is same the process as + If the process identified by <c><anno>Suspendee</anno></c> is same the process as the process calling <c>erlang:suspend_process/2</c>. </item> <tag><c>badarg</c></tag> <item> - If the process identified by <c>Suspendee</c> is not alive. + If the process identified by <c><anno>Suspendee</anno></c> is not alive. </item> <tag><c>badarg</c></tag> <item> - If the process identified by <c>Suspendee</c> resides on another node. + If the process identified by <c><anno>Suspendee</anno></c> resides on another node. </item> <tag><c>badarg</c></tag> <item> - If <c>OptList</c> isn't a proper list of valid <c>Opt</c>s. + If <c><anno>OptList</anno></c> isn't a proper list of valid <c><anno>Opt</anno></c>s. </item> <tag><c>system_limit</c></tag> <item> - If the process identified by <c>Suspendee</c> has been suspended more + If the process identified by <c><anno>Suspendee</anno></c> has been suspended more times by the calling process than can be represented by the currently used internal data structures. The current system limit is larger than 2 000 000 000 suspends, and it will never be less @@ -5173,292 +4636,322 @@ ok </desc> </func> <func> - <name>erlang:system_flag(Flag, Value) -> OldValue</name> - <fsummary>Set system flags</fsummary> - <type> - <v>Flag, Value, OldValue -- see below</v> - </type> + <name name="system_flag" arity="2" clause_i="1"/> + <fsummary>Set system flag backtrace_depth</fsummary> + <desc> + <p>Sets the maximum depth of call stack back-traces in the + exit reason element of <c>'EXIT'</c> tuples.</p> + <p>Returns the old value of the flag.</p> + </desc> + </func> + <func> + <name name="system_flag" arity="2" clause_i="2"/> + <type name="cpu_topology"/> + <type name="level_entry"/> + <type name="level_tag"/> + <type name="sub_level"/> + <type name="info_list"/> + <fsummary>Set system flag cpu_topology</fsummary> + <desc> + <warning> + <p><marker id="system_flag_cpu_topology"></marker> + This argument is <em>deprecated</em> and + scheduled for removal in erts-5.10/OTP-R16. Instead of using + this argument you are advised to use the <c>erl</c> command + line argument <seealso marker="erts:erl#+sct">+sct</seealso>. + When this argument has been removed a final CPU topology to use + will be determined at emulator boot time.</p> + </warning> + <p>Sets the user defined <c><anno>CpuTopology</anno></c>. The user defined + CPU topology will override any automatically detected + CPU topology. By passing <c>undefined</c> as <c><anno>CpuTopology</anno></c> + the system will revert back to the CPU topology automatically + detected. The returned value equals the value returned + from <c>erlang:system_info(cpu_topology)</c> before the + change was made. + </p> + <p>Returns the old value of the flag.</p> + <p>The CPU topology is used when binding schedulers to logical + processors. If schedulers are already bound when the CPU + topology is changed, the schedulers will be sent a request + to rebind according to the new CPU topology. + </p> + <p>The user defined CPU topology can also be set by passing + the <seealso marker="erts:erl#+sct">+sct</seealso> command + line argument to <c>erl</c>. + </p> + <p>For information on the <c><anno>CpuTopology</anno></c> type + and more, see the documentation of + <seealso marker="#system_info_cpu_topology">erlang:system_info(cpu_topology)</seealso>, + and the <c>erl</c> <seealso marker="erts:erl#+sct">+sct</seealso> + and <seealso marker="erts:erl#+sbt">+sbt</seealso> + command line flags. + </p> + </desc> + </func> + <func> + <name name="system_flag" arity="2" clause_i="3"/> + <fsummary>Set system flag fullsweep_after</fsummary> + <desc> + <p><c><anno>Number</anno></c> is a non-negative integer which indicates + how many times generational garbage collections can be + done without forcing a fullsweep collection. The value + applies to new processes; processes already running are + not affected.</p> + <p>Returns the old value of the flag.</p> + <p>In low-memory systems (especially without virtual + memory), setting the value to 0 can help to conserve + memory.</p> + <p>An alternative way to set this value is through the + (operating system) environment variable + <c>ERL_FULLSWEEP_AFTER</c>.</p> + </desc> + </func> + <func> + <name name="system_flag" arity="2" clause_i="4"/> + <fsummary>Set system flag min_heap_size</fsummary> + <desc> + <p>Sets the default minimum heap size for processes. The + size is given in words. The new <c>min_heap_size</c> only + effects processes spawned after the change of + <c>min_heap_size</c> has been made. + The <c>min_heap_size</c> can be set for individual + processes by use of + <seealso marker="#spawn_opt/4">spawn_opt/N</seealso> or + <seealso marker="#process_flag/2">process_flag/2</seealso>. </p> + <p>Returns the old value of the flag.</p> + </desc> + </func> + <func> + <name name="system_flag" arity="2" clause_i="5"/> + <fsummary>Set system flag min_bin_vheap_size</fsummary> + <desc> + <p>Sets the default minimum binary virtual heap size for processes. The + size is given in words. The new <c>min_bin_vhheap_size</c> only + effects processes spawned after the change of + <c>min_bin_vhheap_size</c> has been made. + The <c>min_bin_vheap_size</c> can be set for individual + processes by use of + <seealso marker="#spawn_opt/4">spawn_opt/N</seealso> or + <seealso marker="#process_flag/2">process_flag/2</seealso>. </p> + <p>Returns the old value of the flag.</p> + </desc> + </func> + <func> + <name name="system_flag" arity="2" clause_i="6"/> + <fsummary>Set system flag multi_scheduling</fsummary> + <desc> + <p><marker id="system_flag_multi_scheduling"></marker> + If multi-scheduling is enabled, more than one scheduler + thread is used by the emulator. Multi-scheduling can be + blocked. When multi-scheduling has been blocked, only + one scheduler thread will schedule Erlang processes.</p> + <p>If <c><anno>BlockState</anno> =:= block</c>, multi-scheduling will + be blocked. If <c><anno>BlockState</anno> =:= unblock</c> and no-one + else is blocking multi-scheduling and this process has + only blocked one time, multi-scheduling will be unblocked. + One process can block multi-scheduling multiple times. + If a process has blocked multiple times, it has to + unblock exactly as many times as it has blocked before it + has released its multi-scheduling block. If a process that + has blocked multi-scheduling exits, it will release its + blocking of multi-scheduling.</p> + <p>The return values are <c>disabled</c>, <c>blocked</c>, + or <c>enabled</c>. The returned value describes the + state just after the call to + <c>erlang:system_flag(multi_scheduling, <anno>BlockState</anno>)</c> + has been made. The return values are described in the + documentation of <seealso marker="#system_info_multi_scheduling">erlang:system_info(multi_scheduling)</seealso>.</p> + <p><em>NOTE</em>: Blocking of multi-scheduling should normally + not be needed. If you feel that you need to + block multi-scheduling, think through the + problem at least a couple of times again. + Blocking multi-scheduling should only be used + as a last resort since it will most likely be + a <em>very inefficient</em> way to solve the + problem.</p> + <p>See also <seealso marker="#system_info_multi_scheduling">erlang:system_info(multi_scheduling)</seealso>, + <seealso marker="#system_info_multi_scheduling_blockers">erlang:system_info(multi_scheduling_blockers)</seealso>, and + <seealso marker="#system_info_schedulers">erlang:system_info(schedulers)</seealso>.</p> + </desc> + </func> + <func> + <name name="system_flag" arity="2" clause_i="7"/> + <type name="scheduler_bind_type"/> + <fsummary>Set system flag scheduler_bind_type</fsummary> <desc> <warning> - <p>The - <seealso marker="#system_flag_cpu_topology">cpu_topology</seealso>, - and - <seealso marker="#system_flag_scheduler_bind_type">scheduler_bind_type</seealso> - <c>Flag</c>s are <em>deprecated</em> and have been scheduled for - removal in erts-5.10/OTP-R16.</p> + <p><marker id="system_flag_scheduler_bind_type"></marker> + This argument is <em>deprecated</em> and + scheduled for removal in erts-5.10/OTP-R16. Instead of using + this argument you are advised to use the <c>erl</c> command + line argument <seealso marker="erts:erl#+sbt">+sbt</seealso>. + When this argument has been removed a final scheduler bind type + to use will be determined at emulator boot time.</p> </warning> - <p>Sets various system properties of the Erlang node. Returns - the old value of the flag.</p> + <p>Controls if and how schedulers are bound to logical + processors.</p> + <p>When <c>erlang:system_flag(scheduler_bind_type, <anno>How</anno>)</c> is + called, an asynchronous signal is sent to all schedulers + online which causes them to try to bind or unbind as requested. + <em>NOTE:</em> If a scheduler fails to bind, this + will often be silently ignored. This since it isn't always + possible to verify valid logical processor identifiers. If + an error is reported, it will be reported to the + <c>error_logger</c>. If you want to verify that the + schedulers actually have bound as requested, call + <seealso marker="#system_info_scheduler_bindings">erlang:system_info(scheduler_bindings)</seealso>. + </p> + <p>Schedulers can currently only be bound on newer Linux, + Solaris, FreeBSD, and Windows systems, but more systems will be + supported in the future. + </p> + <p>In order for the runtime system to be able to bind schedulers, + the CPU topology needs to be known. If the runtime system fails + to automatically detect the CPU topology, it can be defined. + For more information on how to define the CPU topology, see + the <c>erl</c> <seealso marker="erts:erl#+sct">+sct</seealso> command + line flag. + </p> + <p>The runtime system will by default <em>not</em> bind schedulers + to logical processors. + </p> + <p><em>NOTE:</em> If the Erlang runtime system is the only + operating system process that binds threads to logical processors, + this improves the performance of the runtime system. However, + if other operating system processes (as for example another Erlang + runtime system) also bind threads to logical processors, there + might be a performance penalty instead. In some cases this + performance penalty might be severe. If this is the case, you + are advised to not bind the schedulers.</p> + <p>Schedulers can be bound in different ways. The <c><anno>How</anno></c> + argument determines how schedulers are bound. <c><anno>How</anno></c> can + currently be one of:</p> <taglist> - <tag><c>erlang:system_flag(backtrace_depth, Depth)</c></tag> - <item> - <p>Sets the maximum depth of call stack back-traces in the - exit reason element of <c>'EXIT'</c> tuples.</p> - </item> - <tag><marker id="system_flag_cpu_topology"><c>erlang:system_flag(cpu_topology, CpuTopology)</c></marker></tag> - <item> - <p><em>NOTE:</em> This argument is <em>deprecated</em> and - scheduled for removal in erts-5.10/OTP-R16. Instead of using - this argument you are advised to use the <c>erl</c> command - line argument <seealso marker="erts:erl#+sct">+sct</seealso>. - When this argument has been removed a final CPU topology to use - will be determined at emulator boot time.</p> - <p>Sets the user defined <c>CpuTopology</c>. The user defined - CPU topology will override any automatically detected - CPU topology. By passing <c>undefined</c> as <c>CpuTopology</c> - the system will revert back to the CPU topology automatically - detected. The returned value equals the value returned - from <c>erlang:system_info(cpu_topology)</c> before the - change was made. - </p> - <p>The CPU topology is used when binding schedulers to logical - processors. If schedulers are already bound when the CPU - topology is changed, the schedulers will be sent a request - to rebind according to the new CPU topology. - </p> - <p>The user defined CPU topology can also be set by passing - the <seealso marker="erts:erl#+sct">+sct</seealso> command - line argument to <c>erl</c>. - </p> - <p>For information on the <c>CpuTopology</c> type - and more, see the documentation of - <seealso marker="#system_info_cpu_topology">erlang:system_info(cpu_topology)</seealso>, - and the <c>erl</c> <seealso marker="erts:erl#+sct">+sct</seealso> - and <seealso marker="erts:erl#+sbt">+sbt</seealso> - command line flags. - </p> - </item> - <tag><c>erlang:system_flag(fullsweep_after, Number)</c></tag> - <item> - <p><c>Number</c> is a non-negative integer which indicates - how many times generational garbage collections can be - done without forcing a fullsweep collection. The value - applies to new processes; processes already running are - not affected.</p> - <p>In low-memory systems (especially without virtual - memory), setting the value to 0 can help to conserve - memory.</p> - <p>An alternative way to set this value is through the - (operating system) environment variable - <c>ERL_FULLSWEEP_AFTER</c>.</p> - </item> - <tag><c>erlang:system_flag(min_heap_size, MinHeapSize)</c></tag> - <item> - <p>Sets the default minimum heap size for processes. The - size is given in words. The new <c>min_heap_size</c> only - effects processes spawned after the change of - <c>min_heap_size</c> has been made. - The <c>min_heap_size</c> can be set for individual - processes by use of - <seealso marker="#spawn_opt/4">spawn_opt/N</seealso> or - <seealso marker="#process_flag/2">process_flag/2</seealso>. </p> - </item> - <tag><c>erlang:system_flag(min_bin_vheap_size, MinBinVHeapSize)</c></tag> - <item> - <p>Sets the default minimum binary virtual heap size for processes. The - size is given in words. The new <c>min_bin_vhheap_size</c> only - effects processes spawned after the change of - <c>min_bin_vhheap_size</c> has been made. - The <c>min_bin_vheap_size</c> can be set for individual - processes by use of - <seealso marker="#spawn_opt/4">spawn_opt/N</seealso> or - <seealso marker="#process_flag/2">process_flag/2</seealso>. </p> - </item> - <tag><marker id="system_flag_multi_scheduling"><c>erlang:system_flag(multi_scheduling, BlockState)</c></marker></tag> - <item> - <p><c>BlockState = block | unblock</c></p> - <p>If multi-scheduling is enabled, more than one scheduler - thread is used by the emulator. Multi-scheduling can be - blocked. When multi-scheduling has been blocked, only - one scheduler thread will schedule Erlang processes.</p> - <p>If <c>BlockState =:= block</c>, multi-scheduling will - be blocked. If <c>BlockState =:= unblock</c> and no-one - else is blocking multi-scheduling and this process has - only blocked one time, multi-scheduling will be unblocked. - One process can block multi-scheduling multiple times. - If a process has blocked multiple times, it has to - unblock exactly as many times as it has blocked before it - has released its multi-scheduling block. If a process that - has blocked multi-scheduling exits, it will release its - blocking of multi-scheduling.</p> - <p>The return values are <c>disabled</c>, <c>blocked</c>, - or <c>enabled</c>. The returned value describes the - state just after the call to - <c>erlang:system_flag(multi_scheduling, BlockState)</c> - has been made. The return values are described in the - documentation of <seealso marker="#system_info_multi_scheduling">erlang:system_info(multi_scheduling)</seealso>.</p> - <p><em>NOTE</em>: Blocking of multi-scheduling should normally - not be needed. If you feel that you need to - block multi-scheduling, think through the - problem at least a couple of times again. - Blocking multi-scheduling should only be used - as a last resort since it will most likely be - a <em>very inefficient</em> way to solve the - problem.</p> - <p>See also <seealso marker="#system_info_multi_scheduling">erlang:system_info(multi_scheduling)</seealso>, - <seealso marker="#system_info_multi_scheduling_blockers">erlang:system_info(multi_scheduling_blockers)</seealso>, and - <seealso marker="#system_info_schedulers">erlang:system_info(schedulers)</seealso>.</p> - </item> - <tag><marker id="system_flag_scheduler_bind_type"><c>erlang:system_flag(scheduler_bind_type, How)</c></marker></tag> - <item> - <p><em>NOTE:</em> This argument is <em>deprecated</em> and - scheduled for removal in erts-5.10/OTP-R16. Instead of using - this argument you are advised to use the <c>erl</c> command - line argument <seealso marker="erts:erl#+sbt">+sbt</seealso>. - When this argument has been removed a final scheduler bind type - to use will be determined at emulator boot time.</p> - <p>Controls if and how schedulers are bound to logical - processors.</p> - <p>When <c>erlang:system_flag(scheduler_bind_type, How)</c> is - called, an asynchronous signal is sent to all schedulers - online which causes them to try to bind or unbind as requested. - <em>NOTE:</em> If a scheduler fails to bind, this - will often be silently ignored. This since it isn't always - possible to verify valid logical processor identifiers. If - an error is reported, it will be reported to the - <c>error_logger</c>. If you want to verify that the - schedulers actually have bound as requested, call - <seealso marker="#system_info_scheduler_bindings">erlang:system_info(scheduler_bindings)</seealso>. - </p> - <p>Schedulers can currently only be bound on newer Linux, - Solaris, FreeBSD, and Windows systems, but more systems will be - supported in the future. - </p> - <p>In order for the runtime system to be able to bind schedulers, - the CPU topology needs to be known. If the runtime system fails - to automatically detect the CPU topology, it can be defined. - For more information on how to define the CPU topology, see - the <c>erl</c> <seealso marker="erts:erl#+sct">+sct</seealso> command - line flag. - </p> - <p>The runtime system will by default <em>not</em> bind schedulers - to logical processors. - </p> - <p><em>NOTE:</em> If the Erlang runtime system is the only - operating system process that binds threads to logical processors, - this improves the performance of the runtime system. However, - if other operating system processes (as for example another Erlang - runtime system) also bind threads to logical processors, there - might be a performance penalty instead. In some cases this - performance penalty might be severe. If this is the case, you - are advised to not bind the schedulers.</p> - <p>Schedulers can be bound in different ways. The <c>How</c> - argument determines how schedulers are bound. <c>How</c> can - currently be one of:</p> - <taglist> - <tag><c>unbound</c></tag> - <item><p>Same as the <c>erl</c> command line argument - <seealso marker="erts:erl#+sbt">+sbt u</seealso>. - </p></item> - <tag><c>no_spread</c></tag> - <item><p>Same as the <c>erl</c> command line argument - <seealso marker="erts:erl#+sbt">+sbt ns</seealso>. - </p></item> - <tag><c>thread_spread</c></tag> - <item><p>Same as the <c>erl</c> command line argument - <seealso marker="erts:erl#+sbt">+sbt ts</seealso>. - </p></item> - <tag><c>processor_spread</c></tag> - <item><p>Same as the <c>erl</c> command line argument - <seealso marker="erts:erl#+sbt">+sbt ps</seealso>. - </p></item> - <tag><c>spread</c></tag> - <item><p>Same as the <c>erl</c> command line argument - <seealso marker="erts:erl#+sbt">+sbt s</seealso>. - </p></item> - <tag><c>no_node_thread_spread</c></tag> - <item><p>Same as the <c>erl</c> command line argument - <seealso marker="erts:erl#+sbt">+sbt nnts</seealso>. - </p></item> - <tag><c>no_node_processor_spread</c></tag> - <item><p>Same as the <c>erl</c> command line argument - <seealso marker="erts:erl#+sbt">+sbt nnps</seealso>. - </p></item> - <tag><c>thread_no_node_processor_spread</c></tag> - <item><p>Same as the <c>erl</c> command line argument - <seealso marker="erts:erl#+sbt">+sbt tnnps</seealso>. - </p></item> - <tag><c>default_bind</c></tag> - <item><p>Same as the <c>erl</c> command line argument - <seealso marker="erts:erl#+sbt">+sbt db</seealso>. - </p></item> - </taglist> - <p>The value returned equals <c>How</c> before the - <c>scheduler_bind_type</c> flag was changed.</p> - <p>Failure:</p> - <taglist> - <tag><c>notsup</c></tag> - <item> - <p>If binding of schedulers is not supported.</p> - </item> - <tag><c>badarg</c></tag> - <item> - <p>If <c>How</c> isn't one of the documented alternatives.</p> - </item> - <tag><c>badarg</c></tag> - <item> - <p>If no CPU topology information is available.</p> - </item> - </taglist> - <p>The scheduler bind type can also be set by passing - the <seealso marker="erts:erl#+sbt">+sbt</seealso> command - line argument to <c>erl</c>. - </p> - <p>For more information, see - <seealso marker="#system_info_scheduler_bind_type">erlang:system_info(scheduler_bind_type)</seealso>, - <seealso marker="#system_info_scheduler_bindings">erlang:system_info(scheduler_bindings)</seealso>, - the <c>erl</c> <seealso marker="erts:erl#+sbt">+sbt</seealso> - and <seealso marker="erts:erl#+sct">+sct</seealso> command line - flags. - </p> - </item> - <tag><marker id="system_flag_scheduler_wall_time"><c>erlang:system_flag(scheduler_wall_time, Boolean)</c></marker></tag> + <tag><c>unbound</c></tag> + <item><p>Same as the <c>erl</c> command line argument + <seealso marker="erts:erl#+sbt">+sbt u</seealso>. + </p></item> + <tag><c>no_spread</c></tag> + <item><p>Same as the <c>erl</c> command line argument + <seealso marker="erts:erl#+sbt">+sbt ns</seealso>. + </p></item> + <tag><c>thread_spread</c></tag> + <item><p>Same as the <c>erl</c> command line argument + <seealso marker="erts:erl#+sbt">+sbt ts</seealso>. + </p></item> + <tag><c>processor_spread</c></tag> + <item><p>Same as the <c>erl</c> command line argument + <seealso marker="erts:erl#+sbt">+sbt ps</seealso>. + </p></item> + <tag><c>spread</c></tag> + <item><p>Same as the <c>erl</c> command line argument + <seealso marker="erts:erl#+sbt">+sbt s</seealso>. + </p></item> + <tag><c>no_node_thread_spread</c></tag> + <item><p>Same as the <c>erl</c> command line argument + <seealso marker="erts:erl#+sbt">+sbt nnts</seealso>. + </p></item> + <tag><c>no_node_processor_spread</c></tag> + <item><p>Same as the <c>erl</c> command line argument + <seealso marker="erts:erl#+sbt">+sbt nnps</seealso>. + </p></item> + <tag><c>thread_no_node_processor_spread</c></tag> + <item><p>Same as the <c>erl</c> command line argument + <seealso marker="erts:erl#+sbt">+sbt tnnps</seealso>. + </p></item> + <tag><c>default_bind</c></tag> + <item><p>Same as the <c>erl</c> command line argument + <seealso marker="erts:erl#+sbt">+sbt db</seealso>. + </p></item> + </taglist> + <p>The value returned equals <c><anno>How</anno></c> before the + <c>scheduler_bind_type</c> flag was changed.</p> + <p>Failure:</p> + <taglist> + <tag><c>notsup</c></tag> <item> - <p>Turns on/off scheduler wall time measurements. </p> - <p>For more information see, - <seealso marker="#statistics_scheduler_wall_time">erlang:statistics(scheduler_wall_time)</seealso>. - </p> + <p>If binding of schedulers is not supported.</p> </item> - - <tag><marker id="system_flag_schedulers_online"><c>erlang:system_flag(schedulers_online, SchedulersOnline)</c></marker></tag> + <tag><c>badarg</c></tag> <item> - <p>Sets the amount of schedulers online. Valid range is - <![CDATA[1 <= SchedulerId <= erlang:system_info(schedulers)]]>. - </p> - <p>For more information see, - <seealso marker="#system_info_schedulers">erlang:system_info(schedulers)</seealso>, - and - <seealso marker="#system_info_schedulers_online">erlang:system_info(schedulers_online)</seealso>. - </p> + <p>If <c>How</c> isn't one of the documented alternatives.</p> </item> - - <tag><c>erlang:system_flag(trace_control_word, TCW)</c></tag> + <tag><c>badarg</c></tag> <item> - <p>Sets the value of the node's trace control word to - <c>TCW</c>. <c>TCW</c> should be an unsigned integer. For - more information see documentation of the - <seealso marker="erts:match_spec#set_tcw">set_tcw</seealso> - function in the match specification documentation in the - ERTS User's Guide.</p> + <p>If no CPU topology information is available.</p> </item> </taglist> - <note> - <p>The <c>schedulers</c> option has been removed as - of erts version 5.5.3. The number of scheduler - threads is determined at emulator boot time, and - cannot be changed after that.</p> - </note> + <p>The scheduler bind type can also be set by passing + the <seealso marker="erts:erl#+sbt">+sbt</seealso> command + line argument to <c>erl</c>. + </p> + <p>For more information, see + <seealso marker="#system_info_scheduler_bind_type">erlang:system_info(scheduler_bind_type)</seealso>, + <seealso marker="#system_info_scheduler_bindings">erlang:system_info(scheduler_bindings)</seealso>, + the <c>erl</c> <seealso marker="erts:erl#+sbt">+sbt</seealso> + and <seealso marker="erts:erl#+sct">+sct</seealso> command line + flags. + </p> </desc> </func> <func> - <name>erlang:system_info(Type) -> Res</name> - <fsummary>Information about the system</fsummary> - <type> - <v>Type, Res -- see below</v> - </type> + <name name="system_flag" arity="2" clause_i="8"/> + <fsummary>Set system flag scheduler_wall_time</fsummary> + <desc><p><marker id="system_flag_scheduler_wall_time"></marker> + Turns on/off scheduler wall time measurements. </p> + <p>For more information see, + <seealso marker="#statistics_scheduler_wall_time">erlang:statistics(scheduler_wall_time)</seealso>. + </p> + </desc> + </func> + <func> + <name name="system_flag" arity="2" clause_i="9"/> + <fsummary>Set system flag schedulers_online</fsummary> <desc> - <p>Returns various information about the current system - (emulator) as specified by <c>Type</c>:</p> + <p><marker id="system_flag_schedulers_online"></marker> + Sets the amount of schedulers online. Valid range is + <![CDATA[1 <= SchedulersOnline <= erlang:system_info(schedulers)]]>. + </p> + <p>Returns the old value of the flag.</p> + <p>For more information see, + <seealso marker="#system_info_schedulers">erlang:system_info(schedulers)</seealso>, + and + <seealso marker="#system_info_schedulers_online">erlang:system_info(schedulers_online)</seealso>. + </p> + </desc> + </func> + <func> + <name name="system_flag" arity="2" clause_i="10"/> + <fsummary>Set system flag trace_control_word</fsummary> + <desc> + <p>Sets the value of the node's trace control word to + <c><anno>TCW</anno></c>. <c><anno>TCW</anno></c> should be an unsigned integer. For + more information see documentation of the + <seealso marker="erts:match_spec#set_tcw">set_tcw</seealso> + function in the match specification documentation in the + ERTS User's Guide.</p> + <p>Returns the old value of the flag.</p> + </desc> + </func> + <func> + <name name="system_info" arity="1" clause_i="1"/> + <name name="system_info" arity="1" clause_i="2"/> + <name name="system_info" arity="1" clause_i="3"/> + <name name="system_info" arity="1" clause_i="4"/> + <name name="system_info" arity="1" clause_i="5"/> + <type variable="Allocator" name_i="2"/> + <type variable="Version" name_i="2"/> + <type variable="Features" name_i="2"/> + <type variable="Settings" name_i="2"/> + <type variable="Alloc" name_i="3"/> + <fsummary>Information about the allocators of the system</fsummary> + <desc> + <p> + Returns various information about the + <marker id="system_info_allocator_tags">allocators</marker> of the + current system (emulator) as specified by + <c><anno>Item</anno></c>:</p> <taglist> <tag><marker id="system_info_allocated_areas"><c>allocated_areas</c></marker></tag> <item> @@ -5483,37 +4976,27 @@ ok </item> <tag><marker id="system_info_allocator"><c>allocator</c></marker></tag> <item> - <p>Returns <c>{Allocator, Version, Features, Settings}.</c></p> - <p>Types:</p> - <list type="bulleted"> - <item><c>Allocator = undefined | glibc</c></item> - <item><c>Version = [integer()]</c></item> - <item><c>Features = [atom()]</c></item> - <item><c>Settings = [{Subsystem, [{Parameter, Value}]}]</c></item> - <item><c>Subsystem = atom()</c></item> - <item><c>Parameter = atom()</c></item> - <item><c>Value = term()</c></item> - </list> + <p>Returns <c>{<anno>Allocator</anno>, <anno>Version</anno>, <anno>Features</anno>, <anno>Settings</anno>}.</c></p> <p>Explanation:</p> <list type="bulleted"> <item> - <p><c>Allocator</c> corresponds to the <c>malloc()</c> - implementation used. If <c>Allocator</c> equals + <p><c><anno>Allocator</anno></c> corresponds to the <c>malloc()</c> + implementation used. If <c><anno>Allocator</anno></c> equals <c>undefined</c>, the <c>malloc()</c> implementation used could not be identified. Currently <c>glibc</c> can be identified.</p> </item> <item> - <p><c>Version</c> is a list of integers (but not a + <p><c><anno>Version</anno></c> is a list of integers (but not a string) representing the version of the <c>malloc()</c> implementation used.</p> </item> <item> - <p><c>Features</c> is a list of atoms representing + <p><c><anno>Features</anno></c> is a list of atoms representing allocation features used.</p> </item> <item> - <p><c>Settings</c> is a list of subsystems, their + <p><c><anno>Settings</anno></c> is a list of subsystems, their configurable parameters, and used values. Settings may differ between different combinations of platforms, allocators, and allocation features. @@ -5533,15 +5016,15 @@ ok erts_alloc(3)</seealso> documentation. </p> </item> - <tag><marker id="system_info_allocator_tuple"><c>{allocator, Alloc}</c></marker></tag> + <tag><marker id="system_info_allocator_tuple"><c>{allocator, <anno>Alloc</anno>}</c></marker></tag> <item> <p>Returns information about the specified allocator. As of erts version 5.6.1 the return value is a list of <c>{instance, InstanceNo, InstanceInfo}</c> tuples where <c>InstanceInfo</c> contains information about a specific instance of the allocator. - If <c>Alloc</c> is not a recognized allocator, - <c>undefined</c> is returned. If <c>Alloc</c> is disabled, + If <c><anno>Alloc</anno></c> is not a recognized allocator, + <c>undefined</c> is returned. If <c><anno>Alloc</anno></c> is disabled, <c>false</c> is returned.</p> <p><em>Note:</em> The information returned is highly implementation dependent and may be changed, or removed @@ -5570,54 +5053,51 @@ ok values. The first value is memory pool size and the second value used memory size.</p> </item> - <tag><marker id="system_info_allocator_sizes"><c>{allocator_sizes, Alloc}</c></marker></tag> + <tag><marker id="system_info_allocator_sizes"><c>{allocator_sizes, <anno>Alloc</anno>}</c></marker></tag> <item> <p>Returns various size information for the specified allocator. The information returned is a subset of the information returned by - <seealso marker="#system_info_allocator_tuple">erlang:system_info({allocator, Alloc})</seealso>. + <seealso marker="#system_info_allocator_tuple">erlang:system_info({allocator, <anno>Alloc</anno>})</seealso>. </p> </item> - <tag><c>build_type</c></tag> - <item> - <p>Returns an atom describing the build type of the runtime - system. This is normally the atom <c>opt</c> for optimized. - Other possible return values are <c>debug</c>, <c>purify</c>, - <c>quantify</c>, <c>purecov</c>, <c>gcov</c>, <c>valgrind</c>, - <c>gprof</c>, and <c>lcnt</c>. Possible return values - may be added and/or removed at any time without prior notice. - </p> - </item> - <tag><c>c_compiler_used</c></tag> - <item> - <p>Returns a two-tuple describing the C compiler used when - compiling the runtime system. The first element is an - atom describing the name of the compiler, or <c>undefined</c> - if unknown. The second element is a term describing the - version of the compiler, or <c>undefined</c> if unknown. - </p> - </item> - <tag><c>check_io</c></tag> - <item> - <p>Returns a list containing miscellaneous information - regarding the emulators internal I/O checking. Note, - the content of the returned list may vary between - platforms and over time. The only thing guaranteed is - that a list is returned.</p> - </item> - <tag><c>compat_rel</c></tag> - <item> - <p>Returns the compatibility mode of the local node as - an integer. The integer returned represents the - Erlang/OTP release which the current emulator has been - set to be backward compatible with. The compatibility - mode can be configured at startup by using the command - line flag <c>+R</c>, see - <seealso marker="erts:erl#compat_rel">erl(1)</seealso>.</p> - </item> - <tag><marker id="system_info_cpu_topology"><c>cpu_topology</c></marker></tag> + </taglist> + </desc> + </func> + <func> + <name name="system_info" arity="1" clause_i="10"/> + <name name="system_info" arity="1" clause_i="11"/> + <type name="cpu_topology"/> + <type name="level_entry"/> + <type_desc name="cpu_topology"> + <marker id="system_info_cpu_topology"></marker> + All <c><anno>LevelEntry</anno></c>s of a list + must contain the same <c><anno>LevelTag</anno></c>, except + on the top level where both <c>node</c> and + <c>processor</c> <c><anno>LevelTag</anno></c>s may co-exist. + </type_desc> + <type_desc name="level_entry"> + <c>{<anno>LevelTag</anno>, <anno>SubLevel</anno>} == {<anno>LevelTag</anno>, [], <anno>SubLevel</anno>}</c> + </type_desc> + <type name="level_tag"/> + <type_desc name="level_tag"> + More <c><anno>LevelTag</anno></c>s may be introduced in the future. + </type_desc> + <type name="sub_level"/> + <type name="info_list"/> + <type_desc name="info_list"> + The <c>info_list()</c> may be extended in the future. + </type_desc> + <fsummary>Information about the CPU topology of the system</fsummary> + <desc> + <p>Returns various information about the + <marker id="system_info_cpu_topology_tags">CPU topology</marker> + of the current system + (emulator) as specified by <c><anno>Item</anno></c>:</p> + <taglist> + <tag><c>cpu_topology</c></tag> <item> - <p>Returns the <c>CpuTopology</c> which currently is used by the + <p>Returns the <c><anno>CpuTopology</anno></c> which currently is used by the emulator. The CPU topology is used when binding schedulers to logical processors. The CPU topology used is the <seealso marker="erlang#system_info_cpu_topology_defined">user @@ -5625,31 +5105,11 @@ ok <seealso marker="erlang#system_info_cpu_topology_detected">automatically detected CPU topology</seealso> if such exists. If no CPU topology exists, <c>undefined</c> is returned.</p> - <p>Types:</p> - <list type="bulleted"> - <item><c>CpuTopology = LevelEntryList | undefined</c></item> - <item><c>LevelEntryList = [LevelEntry]</c> (all - <c>LevelEntry</c>s of a <c>LevelEntryList</c> - must contain the same <c>LevelTag</c>, except - on the top level where both <c>node</c> and - <c>processor</c> <c>LevelTag</c>s may co-exist)</item> - <item><c>LevelEntry = {LevelTag, SubLevel} - | {LevelTag, InfoList, SubLevel}</c> - (<c>{LevelTag, SubLevel} - == {LevelTag, [], SubLevel}</c>)</item> - <item><c>LevelTag = node|processor|core|thread</c> - (more <c>LevelTag</c>s may be introduced in - the future)</item> - <item><c>SubLevel = [LevelEntry] | LogicalCpuId</c></item> - <item><c>LogicalCpuId = {logical, integer()}</c></item> - <item><c>InfoList = []</c> (the <c>InfoList</c> - may be extended in the future)</item> - </list> <p><c>node</c> refers to NUMA (non-uniform memory access) nodes, and <c>thread</c> refers to hardware threads (e.g. Intels hyper-threads).</p> - <p>A level in the <c>CpuTopology</c> term can be omitted if - only one entry exists and the <c>InfoList</c> is empty. + <p>A level in the <c><anno>CpuTopology</anno></c> term can be omitted if + only one entry exists and the <c><anno>InfoList</anno></c> is empty. </p> <p><c>thread</c> can only be a sub level to <c>core</c>. <c>core</c> can be a sub level to either <c>processor</c> @@ -5661,15 +5121,15 @@ ok consist of a mix of processor internal and external NUMA nodes, as long as each logical CPU belongs to one and only one NUMA node. Cache hierarchy is not part of - the <c>CpuTopology</c> type yet, but will be in the + the <c><anno>CpuTopology</anno></c> type yet, but will be in the future. Other things may also make it into the CPU topology in the future. In other words, expect the - <c>CpuTopology</c> type to change. + <c><anno>CpuTopology</anno></c> type to change. </p> </item> <tag><marker id="system_info_cpu_topology_defined"><c>{cpu_topology, defined}</c></marker></tag> <item> - <p>Returns the user defined <c>CpuTopology</c>. For more + <p>Returns the user defined <c><anno>CpuTopology</anno></c>. For more information see the documentation of the <c>erl</c> <seealso marker="erts:erl#+sct">+sct</seealso> command line flag, and the documentation of the @@ -5679,7 +5139,7 @@ ok </item> <tag><marker id="system_info_cpu_topology_detected"><c>{cpu_topology, detected}</c></marker></tag> <item> - <p>Returns the automatically detected <c>CpuTopology</c>. The + <p>Returns the automatically detected <c><anno>CpuTopology</anno></c>. The emulator currently only detects the CPU topology on some newer Linux, Solaris, FreeBSD, and Windows systems. On Windows system with more than 32 logical processors the CPU topology is not detected. @@ -5691,13 +5151,112 @@ ok </item> <tag><c>{cpu_topology, used}</c></tag> <item> - <p>Returns the <c>CpuTopology</c> which is used by the + <p>Returns the <c><anno>CpuTopology</anno></c> which is used by the emulator. For more information see the documentation of the <seealso marker="#system_info_cpu_topology">cpu_topology</seealso> argument. </p> </item> + </taglist> + </desc> + </func> + <func> + <name name="system_info" arity="1" clause_i="6"/> + <name name="system_info" arity="1" clause_i="7"/> + <name name="system_info" arity="1" clause_i="8"/> + <name name="system_info" arity="1" clause_i="9"/> + <name name="system_info" arity="1" clause_i="12"/> + <name name="system_info" arity="1" clause_i="13"/> + <name name="system_info" arity="1" clause_i="14"/> + <name name="system_info" arity="1" clause_i="15"/> + <name name="system_info" arity="1" clause_i="16"/> + <name name="system_info" arity="1" clause_i="17"/> + <name name="system_info" arity="1" clause_i="18"/> + <name name="system_info" arity="1" clause_i="19"/> + <name name="system_info" arity="1" clause_i="20"/> + <name name="system_info" arity="1" clause_i="21"/> + <name name="system_info" arity="1" clause_i="22"/> + <name name="system_info" arity="1" clause_i="23"/> + <name name="system_info" arity="1" clause_i="24"/> + <name name="system_info" arity="1" clause_i="25"/> + <name name="system_info" arity="1" clause_i="26"/> + <name name="system_info" arity="1" clause_i="27"/> + <name name="system_info" arity="1" clause_i="28"/> + <name name="system_info" arity="1" clause_i="29"/> + <name name="system_info" arity="1" clause_i="30"/> + <name name="system_info" arity="1" clause_i="31"/> + <name name="system_info" arity="1" clause_i="32"/> + <name name="system_info" arity="1" clause_i="33"/> + <name name="system_info" arity="1" clause_i="34"/> + <name name="system_info" arity="1" clause_i="35"/> + <name name="system_info" arity="1" clause_i="36"/> + <name name="system_info" arity="1" clause_i="37"/> + <name name="system_info" arity="1" clause_i="38"/> + <name name="system_info" arity="1" clause_i="39"/> + <name name="system_info" arity="1" clause_i="40"/> + <name name="system_info" arity="1" clause_i="41"/> + <name name="system_info" arity="1" clause_i="42"/> + <name name="system_info" arity="1" clause_i="43"/> + <name name="system_info" arity="1" clause_i="44"/> + <name name="system_info" arity="1" clause_i="45"/> + <name name="system_info" arity="1" clause_i="46"/> + <name name="system_info" arity="1" clause_i="47"/> + <name name="system_info" arity="1" clause_i="48"/> + <name name="system_info" arity="1" clause_i="49"/> + <name name="system_info" arity="1" clause_i="50"/> + <name name="system_info" arity="1" clause_i="51"/> + <fsummary>Information about the system</fsummary> + <desc> + <p>Returns various information about the current system + (emulator) as specified by <c><anno>Item</anno></c>:</p> + <taglist> + <tag><c>allocated_areas</c>, <c>allocator</c>, + <c>alloc_util_allocators</c>, <c>allocator_sizes</c></tag> + <item> + <p>See <seealso marker="#system_info_allocator_tags">above</seealso>.</p> + </item> + <tag><c>build_type</c></tag> + <item> + <p>Returns an atom describing the build type of the runtime + system. This is normally the atom <c>opt</c> for optimized. + Other possible return values are <c>debug</c>, <c>purify</c>, + <c>quantify</c>, <c>purecov</c>, <c>gcov</c>, <c>valgrind</c>, + <c>gprof</c>, and <c>lcnt</c>. Possible return values + may be added and/or removed at any time without prior notice. + </p> + </item> + <tag><c>c_compiler_used</c></tag> + <item> + <p>Returns a two-tuple describing the C compiler used when + compiling the runtime system. The first element is an + atom describing the name of the compiler, or <c>undefined</c> + if unknown. The second element is a term describing the + version of the compiler, or <c>undefined</c> if unknown. + </p> + </item> + <tag><c>check_io</c></tag> + <item> + <p>Returns a list containing miscellaneous information + regarding the emulators internal I/O checking. Note, + the content of the returned list may vary between + platforms and over time. The only thing guaranteed is + that a list is returned.</p> + </item> + <tag><c>compat_rel</c></tag> + <item> + <p>Returns the compatibility mode of the local node as + an integer. The integer returned represents the + Erlang/OTP release which the current emulator has been + set to be backward compatible with. The compatibility + mode can be configured at startup by using the command + line flag <c>+R</c>, see + <seealso marker="erts:erl#compat_rel">erl(1)</seealso>.</p> + </item> + <tag><c>cpu_topology</c></tag> + <item> + <p>See <seealso marker="#system_info_cpu_topology_tags">above</seealso>.</p> + </item> <tag><c>creation</c></tag> <item> <p>Returns the creation of the local node as an integer. @@ -5727,10 +5286,10 @@ ok <item> <p>Returns a list of tuples <c>{Node, ControllingEntity}</c>, one entry for each - connected remote node. The <c>Node</c> is the name of the - node and the <c>ControllingEntity</c> is the port or pid + connected remote node. The <c><anno>Node</anno></c> is the name of the + node and the <c><anno>ControllingEntity</anno></c> is the port or pid responsible for the communication to that node. More - specifically, the <c>ControllingEntity</c> for nodes + specifically, the <c><anno>ControllingEntity</anno></c> for nodes connected via TCP/IP (the normal case) is the socket actually used in communication with the specific node.</p> </item> @@ -5778,7 +5337,7 @@ ok </item> <tag><c>fullsweep_after</c></tag> <item> - <p>Returns <c>{fullsweep_after, integer()}</c> which is the + <p>Returns <c>{fullsweep_after, integer() >= 0}</c> which is the <c>fullsweep_after</c> garbage collection setting used by default. For more information see <c>garbage_collection</c> described below.</p> @@ -5871,12 +5430,12 @@ ok </item> <tag><c>min_heap_size</c></tag> <item> - <p>Returns <c>{min_heap_size, MinHeapSize}</c> where <c>MinHeapSize</c> is the current system wide + <p>Returns <c>{min_heap_size, <anno>MinHeapSize</anno>}</c> where <c><anno>MinHeapSize</anno></c> is the current system wide minimum heap size for spawned processes.</p> </item> <tag><c>min_bin_vheap_size</c></tag> <item> - <p>Returns <c>{min_bin_vheap_size, MinBinVHeapSize}</c> where <c>MinBinVHeapSize</c> is the current system wide + <p>Returns <c>{min_bin_vheap_size, <anno>MinBinVHeapSize</anno>}</c> where <c><anno>MinBinVHeapSize</anno></c> is the current system wide minimum binary virtual heap size for spawned processes.</p> </item> <tag><c>modified_timing_level</c></tag> @@ -5920,10 +5479,10 @@ ok </item> <tag><marker id="system_info_multi_scheduling_blockers"><c>multi_scheduling_blockers</c></marker></tag> <item> - <p>Returns a list of <c>PID</c>s when multi-scheduling - is blocked; otherwise, the empty list. The <c>PID</c>s - in the list is <c>PID</c>s of the processes currently - blocking multi-scheduling. A <c>PID</c> will only be + <p>Returns a list of <c><anno>PID</anno></c>s when multi-scheduling + is blocked; otherwise, the empty list. The <c><anno>PID</anno></c>s + in the list is <c><anno>PID</anno></c>s of the processes currently + blocking multi-scheduling. A <c><anno>PID</anno></c> will only be present once in the list, even if the corresponding process has blocked multiple times.</p> <p>See also <seealso marker="#system_flag_multi_scheduling">erlang:system_flag(multi_scheduling, BlockState)</seealso>, @@ -5998,7 +5557,7 @@ ok <item> <p>Returns the scheduler id (<c>SchedulerId</c>) of the scheduler thread that the calling process is executing - on. <c>SchedulerId</c> is a positive integer; where + on. <c><anno>SchedulerId</anno></c> is a positive integer; where <c><![CDATA[1 <= SchedulerId <= erlang:system_info(schedulers)]]></c>. See also <seealso marker="#system_info_schedulers">erlang:system_info(schedulers)</seealso>.</p> </item> @@ -6030,7 +5589,8 @@ ok <seealso marker="#system_info_schedulers">erlang:system_info(schedulers)</seealso>, and <seealso marker="#system_flag_schedulers_online">erlang:system_flag(schedulers_online, SchedulersOnline)</seealso>. - </p> + </p> <name name="system_info" arity="1" clause_i="49"/> + </item> <tag><c>smp_support</c></tag> <item> @@ -6124,53 +5684,39 @@ ok </func> <func> - <name>erlang:system_monitor() -> MonSettings</name> + <name name="system_monitor" arity="0"/> + <type name="system_monitor_option"/> <fsummary>Current system performance monitoring settings</fsummary> - <type> - <v>MonSettings -> {MonitorPid, Options} | undefined</v> - <v> MonitorPid = pid()</v> - <v> Options = [Option]</v> - <v> Option = {long_gc, Time} | {large_heap, Size} | busy_port | busy_dist_port</v> - <v> Time = Size = integer()</v> - </type> <desc> <p>Returns the current system monitoring settings set by <seealso marker="#system_monitor/2">erlang:system_monitor/2</seealso> - as <c>{MonitorPid, Options}</c>, or <c>undefined</c> if there + as <c>{<anno>MonitorPid</anno>, <anno>Options</anno>}</c>, or <c>undefined</c> if there are no settings. The order of the options may be different from the one that was set.</p> </desc> </func> <func> - <name>erlang:system_monitor(undefined | {MonitorPid, Options}) -> MonSettings</name> + <name name="system_monitor" arity="1"/> + <type name="system_monitor_option"/> <fsummary>Set or clear system performance monitoring options</fsummary> - <type> - <v>MonitorPid, Options, MonSettings -- see below</v> - </type> <desc> <p>When called with the argument <c>undefined</c>, all system performance monitoring settings are cleared.</p> - <p>Calling the function with <c>{MonitorPid, Options}</c> as + <p>Calling the function with <c>{<anno>MonitorPid</anno>, <anno>Options</anno>}</c> as argument, is the same as calling - <seealso marker="#system_monitor/2">erlang:system_monitor(MonitorPid, Options)</seealso>.</p> + <seealso marker="#system_monitor/2">erlang:system_monitor(<anno>MonitorPid</anno>, <anno>Options</anno>)</seealso>.</p> <p>Returns the previous system monitor settings just like <seealso marker="#system_monitor/0">erlang:system_monitor/0</seealso>.</p> </desc> </func> <func> - <name>erlang:system_monitor(MonitorPid, [Option]) -> MonSettings</name> + <name name="system_monitor" arity="2"/> + <type name="system_monitor_option"/> <fsummary>Set system performance monitoring options</fsummary> - <type> - <v>MonitorPid = pid()</v> - <v>Option = {long_gc, Time} | {large_heap, Size} | busy_port | busy_dist_port</v> - <v> Time = Size = integer()</v> - <v>MonSettings = {OldMonitorPid, [Option]}</v> - <v> OldMonitorPid = pid()</v> - </type> - <desc> - <p>Sets system performance monitoring options. <c>MonitorPid</c> + <desc> + <p>Sets system performance monitoring options. <c><anno>MonitorPid</anno></c> is a local pid that will receive system monitor messages, and the second argument is a list of monitoring options:</p> <taglist> @@ -6179,7 +5725,7 @@ ok <p>If a garbage collection in the system takes at least <c>Time</c> wallclock milliseconds, a message <c>{monitor, GcPid, long_gc, Info}</c> is sent to - <c>MonitorPid</c>. <c>GcPid</c> is the pid that was + <c><anno>MonitorPid</anno></c>. <c>GcPid</c> is the pid that was garbage collected and <c>Info</c> is a list of two-element tuples describing the result of the garbage collection. One of the tuples is <c>{timeout, GcTime}</c> where @@ -6202,7 +5748,7 @@ ok <p>If a garbage collection in the system results in the allocated size of a heap being at least <c>Size</c> words, a message <c>{monitor, GcPid, large_heap, Info}</c> - is sent to <c>MonitorPid</c>. <c>GcPid</c> and <c>Info</c> + is sent to <c><anno>MonitorPid</anno></c>. <c>GcPid</c> and <c>Info</c> are the same as for <c>long_gc</c> above, except that the tuple tagged with <c>timeout</c> is not present. <em>Note</em>: As of erts version 5.6 the monitor message @@ -6218,7 +5764,7 @@ ok <p>If a process in the system gets suspended because it sends to a busy port, a message <c>{monitor, SusPid, busy_port, Port}</c> is sent to - <c>MonitorPid</c>. <c>SusPid</c> is the pid that got + <c><anno>MonitorPid</anno></c>. <c>SusPid</c> is the pid that got suspended when sending to <c>Port</c>.</p> </item> <tag><c>busy_dist_port</c></tag> @@ -6227,7 +5773,7 @@ ok sends to a process on a remote node whose inter-node communication was handled by a busy port, a message <c>{monitor, SusPid, busy_dist_port, Port}</c> is sent to - <c>MonitorPid</c>. <c>SusPid</c> is the pid that got + <c><anno>MonitorPid</anno></c>. <c>SusPid</c> is the pid that got suspended when sending through the inter-node communication port <c>Port</c>.</p> </item> @@ -6242,48 +5788,48 @@ ok <p>Keep the monitoring process neat and do not set the system monitor limits too tight.</p> </note> - <p>Failure: <c>badarg</c> if <c>MonitorPid</c> does not exist.</p> + <p>Failure: <c>badarg</c> if <c><anno>MonitorPid</anno></c> does not exist or is not a local process.</p> </desc> </func> <func> - <name>erlang:system_profile() -> ProfilerSettings</name> + <name name="system_profile" arity="0"/> + <type name="system_profile_option"/> <fsummary>Current system profiling settings</fsummary> - <type> - <v>ProfilerSettings -> {ProfilerPid, Options} | undefined</v> - <v> ProfilerPid = pid() | port()</v> - <v> Options = [Option]</v> - <v> Option = runnable_procs | runnable_ports | scheduler | exclusive</v> - </type> <desc> <p>Returns the current system profiling settings set by <seealso marker="#system_profile/2">erlang:system_profile/2</seealso> - as <c>{ProfilerPid, Options}</c>, or <c>undefined</c> if there + as <c>{<anno>ProfilerPid</anno>, <anno>Options</anno>}</c>, or <c>undefined</c> if there are no settings. The order of the options may be different from the one that was set.</p> </desc> </func> <func> - <name>erlang:system_profile(ProfilerPid, Options) -> ProfilerSettings</name> + <name name="system_profile" arity="2"/> + <type name="system_profile_option"/> <fsummary>Current system profiling settings</fsummary> - <type> - <v>ProfilerSettings -> {ProfilerPid, Options} | undefined</v> - <v> ProfilerPid = pid() | port()</v> - <v> Options = [Option]</v> - <v> Option = runnable_procs | runnable_ports | scheduler | exclusive</v> - </type> - <desc> - <p>Sets system profiler options. <c>ProfilerPid</c> + <desc> + <p>Sets system profiler options. <c><anno>ProfilerPid</anno></c> is a local pid or port that will receive profiling messages. The receiver is excluded from all profiling. The second argument is a list of profiling options:</p> <taglist> + <tag><c>exclusive</c></tag> + <item> + <p> + If a synchronous call to a port from a process is done, the + calling process is considered not runnable during the call + runtime to the port. The calling process is notified as + <c>inactive</c> and subsequently <c>active</c> when the port + callback returns. + </p> + </item> <tag><c>runnable_procs</c></tag> <item> <p>If a process is put into or removed from the run queue a message, <c>{profile, Pid, State, Mfa, Ts}</c>, is sent to - <c>ProfilerPid</c>. Running processes that is reinserted into the + <c><anno>ProfilerPid</anno></c>. Running processes that is reinserted into the run queue after having been preemptively scheduled out will not trigger this message. </p> @@ -6292,24 +5838,14 @@ ok <item> <p>If a port is put into or removed from the run queue a message, <c>{profile, Port, State, 0, Ts}</c>, is sent to - <c>ProfilerPid</c>. + <c><anno>ProfilerPid</anno></c>. </p> </item> <tag><c>scheduler</c></tag> <item> <p>If a scheduler is put to sleep or awoken a message, <c>{profile, scheduler, Id, State, NoScheds, Ts}</c>, is sent - to <c>ProfilerPid</c>. - </p> - </item> - <tag><c>exclusive</c></tag> - <item> - <p> - If a synchronous call to a port from a process is done, the - calling process is considered not runnable during the call - runtime to the port. The calling process is notified as - <c>inactive</c> and subsequently <c>active</c> when the port - callback returns. + to <c><anno>ProfilerPid</anno></c>. </p> </item> </taglist> @@ -6320,14 +5856,11 @@ ok </func> <func> - <name>term_to_binary(Term) -> ext_binary()</name> + <name name="term_to_binary" arity="1"/> <fsummary>Encode a term to an Erlang external term format binary</fsummary> - <type> - <v>Term = term()</v> - </type> <desc> <p>Returns a binary data object which is the result of encoding - <c>Term</c> according to the Erlang external term format.</p> + <c><anno>Term</anno></c> according to the Erlang external term format.</p> <p>This can be used for a variety of purposes, for example writing a term to a file in an efficient way, or sending an Erlang term to some type of communications channel not @@ -6337,20 +5870,16 @@ ok </desc> </func> <func> - <name>term_to_binary(Term, [Option]) -> ext_binary()</name> + <name name="term_to_binary" arity="2"/> <fsummary>Encode a term to en Erlang external term format binary</fsummary> - <type> - <v>Term = term()</v> - <v>Option = compressed | {compressed,Level} | {minor_version,Version}</v> - </type> <desc> <p>Returns a binary data object which is the result of encoding - <c>Term</c> according to the Erlang external term format.</p> + <c><anno>Term</anno></c> according to the Erlang external term format.</p> <p>If the option <c>compressed</c> is provided, the external term format will be compressed. The compressed format is automatically recognized by <c>binary_to_term/1</c> in R7B and later.</p> <p>It is also possible to specify a compression level by giving - the option <c>{compressed,Level}</c>, where <c>Level</c> is an + the option <c>{compressed, <anno>Level</anno>}</c>, where <c><anno>Level</anno></c> is an integer from 0 through 9. <c>0</c> means that no compression will be done (it is the same as not giving any <c>compressed</c> option); <c>1</c> will take the least time but may not compress as well as @@ -6359,16 +5888,16 @@ ok on the input term, level 9 compression may or may not produce a smaller result than level 1 compression.</p> <p>Currently, <c>compressed</c> gives the same result as - <c>{compressed,6}</c>.</p> - <p>The option <c>{minor_version,Version}</c> can be use to control + <c>{compressed, 6}</c>.</p> + <p>The option <c>{minor_version, <anno>Version</anno>}</c> can be use to control some details of the encoding. This option was - introduced in R11B-4. Currently, the allowed values for <c>Version</c> + introduced in R11B-4. Currently, the allowed values for <c><anno>Version</anno></c> are <c>0</c> and <c>1</c>.</p> - <p><c>{minor_version,1}</c> forces any floats in the term to be encoded + <p><c>{minor_version, 1}</c> forces any floats in the term to be encoded in a more space-efficient and exact way (namely in the 64-bit IEEE format, rather than converted to a textual representation). <c>binary_to_term/1</c> in R11B-4 and later is able decode the new representation.</p> - <p><c>{minor_version,0}</c> is currently the default, meaning that floats + <p><c>{minor_version, 0}</c> is currently the default, meaning that floats will be encoded using a textual representation; this option is useful if you want to ensure that releases prior to R11B-4 can decode resulting binary.</p> @@ -6377,14 +5906,11 @@ ok </desc> </func> <func> - <name>throw(Any)</name> + <name name="throw" arity="1"/> <fsummary>Throw an exception</fsummary> - <type> - <v>Any = term()</v> - </type> <desc> <p>A non-local return from a function. If evaluated within a - <c>catch</c>, <c>catch</c> will return the value <c>Any</c>.</p> + <c>catch</c>, <c>catch</c> will return the value <c><anno>Any</anno></c>.</p> <pre> > <input>catch throw({hello, there}).</input> {hello,there}</pre> @@ -6392,11 +5918,8 @@ ok </desc> </func> <func> - <name>time() -> {Hour, Minute, Second}</name> + <name name="time" arity="0"/> <fsummary>Current time</fsummary> - <type> - <v>Hour = Minute = Second = integer() >= 0</v> - </type> <desc> <p>Returns the current time as <c>{Hour, Minute, Second}</c>.</p> <p>The time zone and daylight saving time correction depend on @@ -6407,35 +5930,27 @@ ok </desc> </func> <func> - <name>tl(List1) -> List2</name> + <name name="tl" arity="1"/> <fsummary>Tail of a list</fsummary> - <type> - <v>List1 = List2 = [term()]</v> - </type> <desc> - <p>Returns the tail of <c>List1</c>, that is, the list minus + <p>Returns the tail of <c><anno>List</anno></c>, that is, the list minus the first element.</p> <pre> > <input>tl([geesties, guilies, beasties]).</input> [guilies, beasties]</pre> <p>Allowed in guard tests.</p> - <p>Failure: <c>badarg</c> if <c>List</c> is the empty list [].</p> + <p>Failure: <c>badarg</c> if <c><anno>List</anno></c> is the empty list [].</p> </desc> </func> <func> - <name>erlang:trace(PidSpec, How, FlagList) -> integer() >= 0</name> + <name name="trace" arity="3"/> + <type name="trace_flag"/> <fsummary>Set trace flags for a process or processes</fsummary> - <type> - <v>PidSpec = pid() | existing | new | all</v> - <v>How = boolean()</v> - <v>FlagList = [Flag]</v> - <v> Flag -- see below</v> - </type> - <desc> - <p>Turns on (if <c>How == true</c>) or off (if - <c>How == false</c>) the trace flags in <c>FlagList</c> for - the process or processes represented by <c>PidSpec</c>.</p> - <p><c>PidSpec</c> is either a pid for a local process, or one of + <desc> + <p>Turns on (if <c><anno>How</anno> == true</c>) or off (if + <c><anno>How</anno> == false</c>) the trace flags in <c><anno>FlagList</anno></c> for + the process or processes represented by <c><anno>PidSpec</anno></c>.</p> + <p><c><anno>PidSpec</anno></c> is either a pid for a local process, or one of the following atoms:</p> <taglist> <tag><c>existing</c></tag> @@ -6452,7 +5967,7 @@ ok will be created in the future.</p> </item> </taglist> - <p><c>FlagList</c> can contain any number of the following + <p><c><anno>FlagList</anno></c> can contain any number of the following flags (the "message tags" refers to the list of messages following below):</p> <taglist> @@ -6767,11 +6282,11 @@ ok <p>Only one process can trace a particular process. For this reason, attempts to trace an already traced process will fail.</p> <p>Returns: A number indicating the number of processes that - matched <c>PidSpec</c>. If <c>PidSpec</c> is a pid, - the return value will be <c>1</c>. If <c>PidSpec</c> is + matched <c><anno>PidSpec</anno></c>. If <c><anno>PidSpec</anno></c> is a pid, + the return value will be <c>1</c>. If <c><anno>PidSpec</anno></c> is <c>all</c> or <c>existing</c> the return value will be the number of processes running, excluding tracer processes. - If <c>PidSpec</c> is <c>new</c>, the return value will be + If <c><anno>PidSpec</anno></c> is <c>new</c>, the return value will be <c>0</c>.</p> <p>Failure: If specified arguments are not supported. For example <c>cpu_timestamp</c> is not supported on all @@ -6779,64 +6294,58 @@ ok </desc> </func> <func> - <name>erlang:trace_delivered(Tracee) -> Ref</name> + <name name="trace_delivered" arity="1"/> <fsummary>Notification when trace has been delivered</fsummary> - <type> - <v>Tracee = pid() | all</v> - <v>Ref = reference()</v> - </type> <desc> <p>The delivery of trace messages is dislocated on the time-line compared to other events in the system. If you know that the - <c>Tracee</c> has passed some specific point in its execution, + <c><anno>Tracee</anno></c> has passed some specific point in its execution, and you want to know when at least all trace messages corresponding to events up to this point have reached the tracer - you can use <c>erlang:trace_delivered(Tracee)</c>. A - <c>{trace_delivered, Tracee, Ref}</c> message is sent to - the caller of <c>erlang:trace_delivered(Tracee)</c> when it + you can use <c>erlang:trace_delivered(<anno>Tracee</anno>)</c>. A + <c>{trace_delivered, <anno>Tracee</anno>, <anno>Ref</anno>}</c> message is sent to + the caller of <c>erlang:trace_delivered(<anno>Tracee</anno>)</c> when it is guaranteed that all trace messages have been delivered to - the tracer up to the point that the <c>Tracee</c> had reached + the tracer up to the point that the <c><anno>Tracee</anno></c> had reached at the time of the call to - <c>erlang:trace_delivered(Tracee)</c>.</p> + <c>erlang:trace_delivered(<anno>Tracee</anno>)</c>.</p> <p>Note that the <c>trace_delivered</c> message does <em>not</em> imply that trace messages have been delivered; instead, it implies that all trace messages that <em>should</em> be delivered have - been delivered. It is not an error if <c>Tracee</c> isn't, and + been delivered. It is not an error if <c><anno>Tracee</anno></c> isn't, and hasn't been traced by someone, but if this is the case, <em>no</em> trace messages will have been delivered when the <c>trace_delivered</c> message arrives.</p> - <p>Note that <c>Tracee</c> has to refer to a process currently, + <p>Note that <c><anno>Tracee</anno></c> has to refer to a process currently, or previously existing on the same node as the caller of - <c>erlang:trace_delivered(Tracee)</c> resides on. - The special <c>Tracee</c> atom <c>all</c> denotes all processes + <c>erlang:trace_delivered(<anno>Tracee</anno>)</c> resides on. + The special <c><anno>Tracee</anno></c> atom <c>all</c> denotes all processes that currently are traced in the node.</p> - <p>An example: Process <c>A</c> is tracee, port <c>B</c> is + <p>An example: Process <c>A</c> is <c><anno>Tracee</anno></c>, port <c>B</c> is tracer, and process <c>C</c> is the port owner of <c>B</c>. <c>C</c> wants to close <c>B</c> when <c>A</c> exits. <c>C</c> can ensure that the trace isn't truncated by calling <c>erlang:trace_delivered(A)</c> when <c>A</c> exits and wait - for the <c>{trace_delivered, A, Ref}</c> message before closing + for the <c>{trace_delivered, A, <anno>Ref</anno>}</c> message before closing <c>B</c>.</p> - <p>Failure: <c>badarg</c> if <c>Tracee</c> does not refer to a + <p>Failure: <c>badarg</c> if <c><anno>Tracee</anno></c> does not refer to a process (dead or alive) on the same node as the caller of - <c>erlang:trace_delivered(Tracee)</c> resides on.</p> + <c>erlang:trace_delivered(<anno>Tracee</anno>)</c> resides on.</p> </desc> </func> <func> - <name>erlang:trace_info(PidOrFunc, Item) -> Res</name> + <name name="trace_info" arity="2"/> + <type name="trace_info_return"/> + <type name="trace_info_item_result"/> + <type name="trace_info_flag"/> + <type name="trace_match_spec"/> <fsummary>Trace information about a process or function</fsummary> - <type> - <v>PidOrFunc = pid() | new | {Module, Function, Arity} | on_load</v> - <v> Module = Function = atom()</v> - <v> Arity = arity()</v> - <v>Item, Res -- see below</v> - </type> <desc> <p>Returns trace information about a process or function.</p> - <p>To get information about a process, <c>PidOrFunc</c> should + <p>To get information about a process, <c><anno>PidOrFunc</anno></c> should be a pid or the atom <c>new</c>. The atom <c>new</c> means that the default trace state for processes to be created will - be returned. <c>Item</c> must have one of the following + be returned. <c><anno>Item</anno></c> must have one of the following values:</p> <taglist> <tag><c>flags</c></tag> @@ -6916,22 +6425,24 @@ ok <tag><c>all</c></tag> <item> - <p>Return a list containing the <c>{Item, Value}</c> tuples + <p>Return a list containing the <c>{<anno>Item</anno>, Value}</c> tuples for all other items, or return <c>false</c> if no tracing is active for this function.</p> </item> </taglist> - <p>The actual return value will be <c>{Item, Value}</c>, where + <p>The actual return value will be <c>{<anno>Item</anno>, Value}</c>, where <c>Value</c> is the requested information as described above. If a pid for a dead process was given, or the name of a non-existing function, <c>Value</c> will be <c>undefined</c>.</p> - <p>If <c>PidOrFunc</c> is the <c>on_load</c>, the information + <p>If <c><anno>PidOrFunc</anno></c> is the <c>on_load</c>, the information returned refers to the default value for code that will be loaded.</p> </desc> </func> <func> - <name>erlang:trace_pattern(MFA, MatchSpec) -> integer() >= 0</name> + <name name="trace_pattern" arity="2" clause_i="1"/> + <type name="trace_pattern_mfa"/> + <type name="trace_match_spec"/> <fsummary>Set trace patterns for global call tracing</fsummary> <desc> <p>The same as @@ -6940,11 +6451,11 @@ ok </desc> </func> <func> - <name>erlang:trace_pattern(MFA, MatchSpec, FlagList) -> integer() >= 0</name> + <name name="trace_pattern" arity="3"/> + <type name="trace_pattern_mfa"/> + <type name="trace_match_spec"/> + <type name="trace_pattern_flag"/> <fsummary>Set trace patterns for tracing of function calls</fsummary> - <type> - <v>MFA, MatchSpec, FlagList -- see below</v> - </type> <desc> <p>This BIF is used to enable or disable call tracing for exported functions. It must be combined with @@ -6969,7 +6480,7 @@ ok and an action to be performed. The default action is to send a trace message. If the pattern does not match or the guard fails, the action will not be executed.</p> - <p>The <c>MFA</c> argument should be a tuple like + <p>The <c><anno>MFA</anno></c> argument should be a tuple like <c>{Module, Function, Arity}</c> or the atom <c>on_load</c> (described below). It can be the module, function, and arity for an exported function (or a BIF in any module). @@ -6992,11 +6503,11 @@ ok </taglist> <p>Other combinations, such as <c>{Module,'_',Arity}</c>, are not allowed. Local functions will match wildcards only if - the <c>local</c> option is in the <c>FlagList</c>.</p> - <p>If the <c>MFA</c> argument is the atom <c>on_load</c>, + the <c>local</c> option is in the <c><anno>FlagList</anno></c>.</p> + <p>If the <c><anno>MFA</anno></c> argument is the atom <c>on_load</c>, the match specification and flag list will be used on all modules that are newly loaded.</p> - <p>The <c>MatchSpec</c> argument can take any of the following + <p>The <c><anno>MatchSpec</anno></c> argument can take any of the following forms:</p> <taglist> <tag><c>false</c></tag> @@ -7008,7 +6519,7 @@ ok <item> <p>Enable tracing for the matching function(s).</p> </item> - <tag><c>MatchSpecList</c></tag> + <tag><c><anno>MatchSpecList</anno></c></tag> <item> <p>A list of match specifications. An empty list is equivalent to <c>true</c>. See the ERTS User's Guide @@ -7016,18 +6527,18 @@ ok </item> <tag><c>restart</c></tag> <item> - <p>For the <c>FlagList</c> option <c>call_count</c> and <c>call_time</c>: + <p>For the <c><anno>FlagList</anno></c> option <c>call_count</c> and <c>call_time</c>: restart the existing counters. The behaviour is undefined - for other <c>FlagList</c> options.</p> + for other <c><anno>FlagList</anno></c> options.</p> </item> <tag><c>pause</c></tag> <item> - <p>For the <c>FlagList</c> option <c>call_count</c> and <c>call_time</c>: pause + <p>For the <c><anno>FlagList</anno></c> option <c>call_count</c> and <c>call_time</c>: pause the existing counters. The behaviour is undefined for other <c>FlagList</c> options.</p> </item> </taglist> - <p>The <c>FlagList</c> parameter is a list of options. + <p>The <c><anno>FlagList</anno></c> parameter is a list of options. The following options are allowed:</p> <taglist> <tag><c>global</c></tag> @@ -7046,13 +6557,13 @@ ok the process, a <c>return_to</c> message will also be sent when this function returns to its caller.</p> </item> - <tag><c>meta | {meta, Pid}</c></tag> + <tag><c>meta | {meta, <anno>Pid</anno>}</c></tag> <item> <p>Turn on or off meta tracing for all types of function calls. Trace messages will be sent to the tracer process - or port <c>Pid</c> whenever any of the specified + or port <c><anno>Pid</anno></c> whenever any of the specified functions are called, regardless of how they are called. - If no <c>Pid</c> is specified, <c>self()</c> is used as a + If no <c><anno>Pid</anno></c> is specified, <c>self()</c> is used as a default tracer process.</p> <p>Meta tracing traces all processes and does not care about the process trace flags set by <c>trace/3</c>, @@ -7064,32 +6575,32 @@ ok </item> <tag><c>call_count</c></tag> <item> - <p>Starts (<c>MatchSpec == true</c>) or stops - (<c>MatchSpec == false</c>) call count tracing for all + <p>Starts (<c><anno>MatchSpec</anno> == true</c>) or stops + (<c><anno>MatchSpec</anno> == false</c>) call count tracing for all types of function calls. For every function a counter is incremented when the function is called, in any process. No process trace flags need to be activated.</p> <p>If call count tracing is started while already running, the count is restarted from zero. Running counters can be - paused with <c>MatchSpec == pause</c>. Paused and running + paused with <c><anno>MatchSpec</anno> == pause</c>. Paused and running counters can be restarted from zero with - <c>MatchSpec == restart</c>.</p> + <c><anno>MatchSpec</anno> == restart</c>.</p> <p>The counter value can be read with <seealso marker="#trace_info/2">erlang:trace_info/2</seealso>.</p> </item> <tag><c>call_time</c></tag> <item> - <p>Starts (<c>MatchSpec == true</c>) or stops - (<c>MatchSpec == false</c>) call time tracing for all + <p>Starts (<c><anno>MatchSpec</anno> == true</c>) or stops + (<c><anno>MatchSpec</anno> == false</c>) call time tracing for all types of function calls. For every function a counter is incremented when the function is called. Time spent in the function is accumulated in two other counters, seconds and micro-seconds. The counters are stored for each call traced process.</p> <p>If call time tracing is started while already running, the count and time is restarted from zero. Running counters can be - paused with <c>MatchSpec == pause</c>. Paused and running + paused with <c><anno>MatchSpec</anno> == pause</c>. Paused and running counters can be restarted from zero with - <c>MatchSpec == restart</c>.</p> + <c><anno>MatchSpec</anno> == restart</c>.</p> <p>The counter value can be read with <seealso marker="#trace_info/2">erlang:trace_info/2</seealso>.</p> </item> @@ -7115,18 +6626,15 @@ ok <seealso marker="#trace_info/2">erlang:trace_info/2</seealso> BIF to retrieve the existing match specification.</p> <p>Returns the number of exported functions that matched - the <c>MFA</c> argument. This will be zero if none matched at + the <c><anno>MFA</anno></c> argument. This will be zero if none matched at all.</p> </desc> </func> <func> - <name>trunc(Number) -> integer()</name> + <name name="trunc" arity="1"/> <fsummary>Return an integer by the truncating a number</fsummary> - <type> - <v>Number = number()</v> - </type> <desc> - <p>Returns an integer by the truncating <c>Number</c>.</p> + <p>Returns an integer by the truncating <c><anno>Number</anno></c>.</p> <pre> > <input>trunc(5.5).</input> 5</pre> @@ -7134,13 +6642,10 @@ ok </desc> </func> <func> - <name>tuple_size(Tuple) -> integer() >= 0</name> + <name name="tuple_size" arity="1"/> <fsummary>Return the size of a tuple</fsummary> - <type> - <v>Tuple = tuple()</v> - </type> <desc> - <p>Returns an integer which is the number of elements in <c>Tuple</c>.</p> + <p>Returns an integer which is the number of elements in <c><anno>Tuple</anno></c>.</p> <pre> > <input>tuple_size({morni, mulle, bwange}).</input> 3</pre> @@ -7148,25 +6653,19 @@ ok </desc> </func> <func> - <name>tuple_to_list(Tuple) -> [term()]</name> + <name name="tuple_to_list" arity="1"/> <fsummary>Convert a tuple to a list</fsummary> - <type> - <v>Tuple = tuple()</v> - </type> <desc> - <p>Returns a list which corresponds to <c>Tuple</c>. - <c>Tuple</c> may contain any Erlang terms.</p> + <p>Returns a list which corresponds to <c><anno>Tuple</anno></c>. + <c><anno>Tuple</anno></c> may contain any Erlang terms.</p> <pre> > <input>tuple_to_list({share, {'Ericsson_B', 163}}).</input> [share,{'Ericsson_B',163}]</pre> </desc> </func> <func> - <name>erlang:universaltime() -> DateTime</name> + <name name="universaltime" arity="0"/> <fsummary>Current date and time according to Universal Time Coordinated (UTC)</fsummary> - <type> - <v>DateTime = <seealso marker="calendar#type-datetime">calendar:datetime()</seealso></v> - </type> <desc> <p>Returns the current date and time according to Universal Time Coordinated (UTC), also called GMT, in the form @@ -7180,46 +6679,39 @@ ok </desc> </func> <func> - <name>erlang:universaltime_to_localtime({Date1, Time1}) -> {Date2, Time2}</name> + <name name="universaltime_to_localtime" arity="1"/> <fsummary>Convert from Universal Time Coordinated (UTC) to local date and time</fsummary> - <type> - <v>Date1 = Date2 = <seealso marker="calendar#type-date">calendar:date()</seealso></v> - <v>Time1 = Time2 = <seealso marker="calendar#type-time">calendar:time()</seealso></v> - </type> <desc> <p>Converts Universal Time Coordinated (UTC) date and time to local date and time, if this is supported by the underlying OS. Otherwise, no conversion is done, and - <c>{Date1, Time1}</c> is returned.</p> + <c><anno>Universaltime</anno></c> is returned.</p> <pre> > <input>erlang:universaltime_to_localtime({{1996,11,6},{14,18,43}}).</input> {{1996,11,7},{15,18,43}}</pre> - <p>Failure: <c>badarg</c> if <c>Date1</c> or <c>Time1</c> do - not denote a valid date or time.</p> + <p>Failure: <c>badarg</c> if <c>Universaltime</c> does not denote + a valid date and time.</p> </desc> </func> <func> - <name>unlink(Id) -> true</name> + <name name="unlink" arity="1"/> <fsummary>Remove a link, if there is one, to another process or port</fsummary> - <type> - <v>Id = pid() | port()</v> - </type> <desc> <p>Removes the link, if there is one, between the calling - process and the process or port referred to by <c>Id</c>.</p> + process and the process or port referred to by <c><anno>Id</anno></c>.</p> <p>Returns <c>true</c> and does not fail, even if there is no - link to <c>Id</c>, or if <c>Id</c> does not exist.</p> - <p>Once <c>unlink(Id)</c> has returned it is guaranteed that + link to <c><anno>Id</anno></c>, or if <c><anno>Id</anno></c> does not exist.</p> + <p>Once <c>unlink(<anno>Id</anno>)</c> has returned it is guaranteed that the link between the caller and the entity referred to by - <c>Id</c> has no effect on the caller in the future (unless + <c><anno>Id</anno></c> has no effect on the caller in the future (unless the link is setup again). If caller is trapping exits, an - <c>{'EXIT', Id, _}</c> message due to the link might have + <c>{'EXIT', <anno>Id</anno>, _}</c> message due to the link might have been placed in the caller's message queue prior to the call, - though. Note, the <c>{'EXIT', Id, _}</c> message can be the - result of the link, but can also be the result of <c>Id</c> + though. Note, the <c>{'EXIT', <anno>Id</anno>, _}</c> message can be the + result of the link, but can also be the result of <c><anno>Id</anno></c> calling <c>exit/2</c>. Therefore, it <em>may</em> be appropriate to cleanup the message queue when trapping exits - after the call to <c>unlink(Id)</c>, as follow:</p> + after the call to <c>unlink(<anno>Id</anno>)</c>, as follow:</p> <code type="none"> unlink(Id), @@ -7242,13 +6734,10 @@ ok </desc> </func> <func> - <name>unregister(RegName) -> true</name> + <name name="unregister" arity="1"/> <fsummary>Remove the registered name for a process (or port)</fsummary> - <type> - <v>RegName = atom()</v> - </type> <desc> - <p>Removes the registered name <c>RegName</c>, associated with a + <p>Removes the registered name <c><anno>RegName</anno></c>, associated with a pid or a port identifier.</p> <pre> > <input>unregister(db).</input> @@ -7259,7 +6748,7 @@ true</pre> </desc> </func> <func> - <name>whereis(RegName) -> pid() | port() | undefined</name> + <name name="whereis" arity="1"/> <fsummary>Get the pid (or port) with a given registered name</fsummary> <desc> <p>Returns the pid or port identifier with the registered name diff --git a/erts/emulator/Makefile.in b/erts/emulator/Makefile.in index 6040308aa7..d66b28ee53 100644 --- a/erts/emulator/Makefile.in +++ b/erts/emulator/Makefile.in @@ -709,7 +709,9 @@ EMU_OBJS = \ $(OBJDIR)/beam_emu.o $(OBJDIR)/beam_opcodes.o \ $(OBJDIR)/beam_load.o $(OBJDIR)/beam_bif_load.o \ $(OBJDIR)/beam_debug.o $(OBJDIR)/beam_bp.o \ - $(OBJDIR)/beam_catches.o + $(OBJDIR)/beam_catches.o \ + $(OBJDIR)/code_ix.o \ + $(OBJDIR)/beam_ranges.o RUN_OBJS = \ $(OBJDIR)/erl_pbifs.o $(OBJDIR)/benchmark.o \ diff --git a/erts/emulator/beam/beam_bif_load.c b/erts/emulator/beam/beam_bif_load.c index ada2d152b7..4bf1c13421 100644 --- a/erts/emulator/beam/beam_bif_load.c +++ b/erts/emulator/beam/beam_bif_load.c @@ -37,25 +37,83 @@ static void set_default_trace_pattern(Eterm module); static Eterm check_process_code(Process* rp, Module* modp); -static void delete_code(Process *c_p, ErtsProcLocks c_p_locks, Module* modp); -static void delete_export_references(Eterm module); -static int purge_module(int module); +static void delete_code(Module* modp); static void decrement_refc(BeamInstr* code); static int is_native(BeamInstr* code); static int any_heap_ref_ptrs(Eterm* start, Eterm* end, char* mod_start, Uint mod_size); static int any_heap_refs(Eterm* start, Eterm* end, char* mod_start, Uint mod_size); -static void remove_from_address_table(BeamInstr* code); -Eterm -load_module_2(BIF_ALIST_2) + + +BIF_RETTYPE code_is_module_native_1(BIF_ALIST_1) { - Eterm reason; - Eterm* hp; - int sz; - byte* code; + Module* modp; Eterm res; + ErtsCodeIndex code_ix; + + if (is_not_atom(BIF_ARG_1)) { + BIF_ERROR(BIF_P, BADARG); + } + code_ix = erts_active_code_ix(); + if ((modp = erts_get_module(BIF_ARG_1, code_ix)) == NULL) { + return am_undefined; + } + erts_rlock_old_code(code_ix); + res = ((modp->curr.code && is_native(modp->curr.code)) || + (modp->old.code != 0 && is_native(modp->old.code))) ? + am_true : am_false; + erts_runlock_old_code(code_ix); + return res; +} + +BIF_RETTYPE code_make_stub_module_3(BIF_ALIST_3) +{ + Module* modp; + Eterm res; + + if (!erts_try_seize_code_write_permission(BIF_P)) { + ERTS_BIF_YIELD3(bif_export[BIF_code_make_stub_module_3], + BIF_P, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3); + } + + erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN); + erts_smp_thr_progress_block(); + + modp = erts_get_module(BIF_ARG_1, erts_active_code_ix()); + + if (modp && modp->curr.num_breakpoints > 0) { + ASSERT(modp->curr.code != NULL); + erts_clear_module_break(modp); + ASSERT(modp->curr.num_breakpoints == 0); + } + + erts_start_staging_code_ix(); + + res = erts_make_stub_module(BIF_P, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3); + + if (res == BIF_ARG_1) { + erts_end_staging_code_ix(); + erts_commit_staging_code_ix(); + } + else { + erts_abort_staging_code_ix(); + } + erts_smp_thr_progress_unblock(); + erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN); + erts_release_code_write_permission(); + return res; +} + +BIF_RETTYPE +prepare_loading_2(BIF_ALIST_2) +{ byte* temp_alloc = NULL; - struct LoaderState* stp; + byte* code; + Uint sz; + Binary* magic; + Eterm reason; + Eterm* hp; + Eterm res; if (is_not_atom(BIF_ARG_1)) { error: @@ -65,108 +123,277 @@ load_module_2(BIF_ALIST_2) if ((code = erts_get_aligned_binary_bytes(BIF_ARG_2, &temp_alloc)) == NULL) { goto error; } - hp = HAlloc(BIF_P, 3); - /* - * Read the BEAM file and prepare the module for loading. - */ - stp = erts_alloc_loader_state(); + magic = erts_alloc_loader_state(); sz = binary_size(BIF_ARG_2); - reason = erts_prepare_loading(stp, BIF_P, BIF_P->group_leader, + reason = erts_prepare_loading(magic, BIF_P, BIF_P->group_leader, &BIF_ARG_1, code, sz); erts_free_aligned_binary_bytes(temp_alloc); if (reason != NIL) { + hp = HAlloc(BIF_P, 3); res = TUPLE2(hp, am_error, reason); BIF_RET(res); } + hp = HAlloc(BIF_P, PROC_BIN_SIZE); + res = erts_mk_magic_binary_term(&hp, &MSO(BIF_P), magic); + erts_refc_dec(&magic->refc, 1); + BIF_RET(res); +} - /* - * Stop all other processes and finish the loading of the module. - */ - erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN); - erts_smp_thr_progress_block(); +struct m { + Binary* code; + Eterm module; + Module* modp; + Uint exception; +}; - reason = erts_finish_loading(stp, BIF_P, 0, &BIF_ARG_1); - if (reason != NIL) { - res = TUPLE2(hp, am_error, reason); - } else { - set_default_trace_pattern(BIF_ARG_1); - res = TUPLE2(hp, am_module, BIF_ARG_1); - } +static Eterm staging_epilogue(Process* c_p, int, Eterm res, int, struct m*, int); - erts_smp_thr_progress_unblock(); - erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN); - BIF_RET(res); +static Eterm +exception_list(Process* p, Eterm tag, struct m* mp, Sint exceptions) +{ + Eterm* hp = HAlloc(p, 3 + 2*exceptions); + Eterm res = NIL; + + mp += exceptions - 1; + while (exceptions > 0) { + if (mp->exception) { + res = CONS(hp, mp->module, res); + hp += 2; + exceptions--; + } + mp--; + } + return TUPLE2(hp, tag, res); } -BIF_RETTYPE purge_module_1(BIF_ALIST_1) + +BIF_RETTYPE +finish_loading_1(BIF_ALIST_1) { - int purge_res; + int i; + int n; + struct m* p = NULL; + Uint exceptions; + Eterm res; + int is_blocking = 0; + int do_commit = 0; - if (is_not_atom(BIF_ARG_1)) { - BIF_ERROR(BIF_P, BADARG); + if (!erts_try_seize_code_write_permission(BIF_P)) { + ERTS_BIF_YIELD1(bif_export[BIF_finish_loading_1], BIF_P, BIF_ARG_1); } - erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN); - erts_smp_thr_progress_block(); + /* + * Validate the argument before we start loading; it must be a + * proper list where each element is a magic binary containing + * prepared (not previously loaded) code. + * + * First count the number of elements and allocate an array + * to keep the elements in. + */ - erts_export_consolidate(); - purge_res = purge_module(atom_val(BIF_ARG_1)); + n = list_length(BIF_ARG_1); + if (n == -1) { + ERTS_BIF_PREP_ERROR(res, BIF_P, BADARG); + goto done; + } + p = erts_alloc(ERTS_ALC_T_LOADER_TMP, n*sizeof(struct m)); - erts_smp_thr_progress_unblock(); - erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN); + /* + * We now know that the argument is a proper list. Validate + * and collect the binaries into the array. + */ - if (purge_res < 0) { - BIF_ERROR(BIF_P, BADARG); + for (i = 0; i < n; i++) { + Eterm* cons = list_val(BIF_ARG_1); + Eterm term = CAR(cons); + ProcBin* pb; + + if (!ERTS_TERM_IS_MAGIC_BINARY(term)) { + ERTS_BIF_PREP_ERROR(res, BIF_P, BADARG); + goto done; + } + pb = (ProcBin*) binary_val(term); + p[i].code = pb->val; + p[i].module = erts_module_for_prepared_code(p[i].code); + if (p[i].module == NIL) { + ERTS_BIF_PREP_ERROR(res, BIF_P, BADARG); + goto done; + } + BIF_ARG_1 = CDR(cons); } - BIF_RET(am_true); -} -BIF_RETTYPE code_is_module_native_1(BIF_ALIST_1) -{ - Module* modp; + /* + * Since we cannot handle atomic loading of a group of modules + * if one or more of them uses on_load, we will only allow one + * element in the list. This limitation is intended to be + * lifted in the future. + */ - if (is_not_atom(BIF_ARG_1)) { - BIF_ERROR(BIF_P, BADARG); + if (n > 1) { + ERTS_BIF_PREP_ERROR(res, BIF_P, SYSTEM_LIMIT); + goto done; } - if ((modp = erts_get_module(BIF_ARG_1)) == NULL) { - return am_undefined; + + /* + * All types are correct. There cannot be a BADARG from now on. + * Before we can start loading, we must check whether any of + * the modules already has old code. To avoid a race, we must + * not allow other process to initiate a code loading operation + * from now on. + */ + + res = am_ok; + erts_start_staging_code_ix(); + + for (i = 0; i < n; i++) { + p[i].modp = erts_put_module(p[i].module); + } + for (i = 0; i < n; i++) { + if (p[i].modp->curr.num_breakpoints > 0 || + p[i].modp->curr.num_traced_exports > 0 || + erts_is_default_trace_enabled()) { + /* tracing involved, fallback with thread blocking */ + erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN); + erts_smp_thr_progress_block(); + is_blocking = 1; + break; + } } - return ((modp->code && is_native(modp->code)) || - (modp->old_code != 0 && is_native(modp->old_code))) ? - am_true : am_false; -} -BIF_RETTYPE code_make_stub_module_3(BIF_ALIST_3) -{ - Eterm res; + if (is_blocking) { + for (i = 0; i < n; i++) { + if (p[i].modp->curr.num_breakpoints) { + erts_clear_module_break(p[i].modp); + ASSERT(p[i].modp->curr.num_breakpoints == 0); + } + } + } - erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN); - erts_smp_thr_progress_block(); + exceptions = 0; + for (i = 0; i < n; i++) { + p[i].exception = 0; + if (p[i].modp->curr.code && p[i].modp->old.code) { + p[i].exception = 1; + exceptions++; + } + } - erts_export_consolidate(); - res = erts_make_stub_module(BIF_P, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3); + if (exceptions) { + res = exception_list(BIF_P, am_not_purged, p, exceptions); + } else { + /* + * Now we can load all code. This can't fail. + */ - erts_smp_thr_progress_unblock(); - erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN); - return res; + exceptions = 0; + for (i = 0; i < n; i++) { + Eterm mod; + Eterm retval; + + erts_refc_inc(&p[i].code->refc, 1); + retval = erts_finish_loading(p[i].code, BIF_P, 0, &mod); + ASSERT(retval == NIL || retval == am_on_load); + if (retval == am_on_load) { + p[i].exception = 1; + exceptions++; + } + } + + /* + * Check whether any module has an on_load_handler. + */ + + if (exceptions) { + res = exception_list(BIF_P, am_on_load, p, exceptions); + } + do_commit = 1; + } + +done: + return staging_epilogue(BIF_P, do_commit, res, is_blocking, p, n); +} + +static Eterm +staging_epilogue(Process* c_p, int commit, Eterm res, int is_blocking, + struct m* loaded, int nloaded) +{ +#ifdef ERTS_SMP + if (is_blocking || !commit) +#endif + { + if (commit) { + erts_end_staging_code_ix(); + erts_commit_staging_code_ix(); + if (loaded) { + int i; + for (i=0; i < nloaded; i++) { + set_default_trace_pattern(loaded[i].module); + } + } + } + else { + erts_abort_staging_code_ix(); + } + if (loaded) { + erts_free(ERTS_ALC_T_LOADER_TMP, loaded); + } + if (is_blocking) { + erts_smp_thr_progress_unblock(); + erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_MAIN); + } + erts_release_code_write_permission(); + return res; + } +#ifdef ERTS_SMP + else { + ErtsThrPrgrVal later; + ASSERT(is_value(res)); + + if (loaded) { + erts_free(ERTS_ALC_T_LOADER_TMP, loaded); + } + erts_end_staging_code_ix(); + /* + * Now we must wait for all schedulers to do a memory barrier before + * we can activate and let them access the new staged code. This allows + * schedulers to read active code_ix in a safe way while executing + * without any memory barriers at all. + */ + + later = erts_thr_progress_later(); + erts_thr_progress_wakeup(c_p->scheduler_data, later); + erts_notify_code_ix_activation(c_p, later); + erts_suspend(c_p, ERTS_PROC_LOCK_MAIN, NULL); + /* + * handle_code_ix_activation() will do the rest "later" + * and resume this process to return 'res'. + */ + ERTS_BIF_YIELD_RETURN(c_p, res); + } +#endif } BIF_RETTYPE check_old_code_1(BIF_ALIST_1) { + ErtsCodeIndex code_ix; Module* modp; + Eterm res = am_false; if (is_not_atom(BIF_ARG_1)) { BIF_ERROR(BIF_P, BADARG); } - modp = erts_get_module(BIF_ARG_1); - if (modp == NULL) { /* Doesn't exist. */ - BIF_RET(am_false); - } else if (modp->old_code == NULL) { /* No old code. */ - BIF_RET(am_false); + code_ix = erts_active_code_ix(); + modp = erts_get_module(BIF_ARG_1, code_ix); + if (modp != NULL) { + erts_rlock_old_code(code_ix); + if (modp->old.code != NULL) { + res = am_true; + } + erts_runlock_old_code(code_ix); } - BIF_RET(am_true); + BIF_RET(res); } Eterm @@ -180,14 +407,20 @@ check_process_code_2(BIF_ALIST_2) } if (is_internal_pid(BIF_ARG_1)) { Eterm res; + ErtsCodeIndex code_ix; if (internal_pid_index(BIF_ARG_1) >= erts_max_processes) goto error; - modp = erts_get_module(BIF_ARG_2); + code_ix = erts_active_code_ix(); + modp = erts_get_module(BIF_ARG_2, code_ix); if (modp == NULL) { /* Doesn't exist. */ return am_false; - } else if (modp->old_code == NULL) { /* No old code. */ + } + erts_rlock_old_code(code_ix); + if (modp->old.code == NULL) { /* No old code. */ + erts_runlock_old_code(code_ix); return am_false; } + erts_runlock_old_code(code_ix); #ifdef ERTS_SMP rp = erts_pid2proc_suspend(BIF_P, ERTS_PROC_LOCK_MAIN, @@ -202,7 +435,14 @@ check_process_code_2(BIF_ALIST_2) ERTS_BIF_YIELD2(bif_export[BIF_check_process_code_2], BIF_P, BIF_ARG_1, BIF_ARG_2); } - res = check_process_code(rp, modp); + erts_rlock_old_code(code_ix); + if (modp->old.code != NULL) { /* must check again */ + res = check_process_code(rp, modp); + } + else { + res = am_false; + } + erts_runlock_old_code(code_ix); #ifdef ERTS_SMP if (BIF_P != rp) { erts_resume(rp, ERTS_PROC_LOCK_MAIN); @@ -223,56 +463,71 @@ check_process_code_2(BIF_ALIST_2) BIF_RETTYPE delete_module_1(BIF_ALIST_1) { - int res; + ErtsCodeIndex code_ix; + Module* modp; + int is_blocking = 0; + int success = 0; + Eterm res = NIL; - if (is_not_atom(BIF_ARG_1)) - goto badarg; + if (is_not_atom(BIF_ARG_1)) { + BIF_ERROR(BIF_P, BADARG); + } - erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN); - erts_smp_thr_progress_block(); + if (!erts_try_seize_code_write_permission(BIF_P)) { + ERTS_BIF_YIELD1(bif_export[BIF_delete_module_1], BIF_P, BIF_ARG_1); + } { - Module *modp = erts_get_module(BIF_ARG_1); + erts_start_staging_code_ix(); + code_ix = erts_staging_code_ix(); + modp = erts_get_module(BIF_ARG_1, code_ix); if (!modp) { res = am_undefined; } - else if (modp->old_code != 0) { + else if (modp->old.code != 0) { erts_dsprintf_buf_t *dsbufp = erts_create_logger_dsbuf(); erts_dsprintf(dsbufp, "Module %T must be purged before loading\n", BIF_ARG_1); erts_send_error_to_logger(BIF_P->group_leader, dsbufp); - res = am_badarg; + ERTS_BIF_PREP_ERROR(res, BIF_P, BADARG); } else { - delete_export_references(BIF_ARG_1); - delete_code(BIF_P, 0, modp); + if (modp->curr.num_breakpoints > 0 || + modp->curr.num_traced_exports > 0) { + /* we have tracing, retry single threaded */ + erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN); + erts_smp_thr_progress_block(); + is_blocking = 1; + if (modp->curr.num_breakpoints) { + erts_clear_module_break(modp); + ASSERT(modp->curr.num_breakpoints == 0); + } + } + delete_code(modp); res = am_true; + success = 1; } } - - erts_smp_thr_progress_unblock(); - erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN); - - if (res == am_badarg) { - badarg: - BIF_ERROR(BIF_P, BADARG); - } - BIF_RET(res); + return staging_epilogue(BIF_P, success, res, is_blocking, NULL, 0); } BIF_RETTYPE module_loaded_1(BIF_ALIST_1) { Module* modp; + ErtsCodeIndex code_ix; + Eterm res = am_false; if (is_not_atom(BIF_ARG_1)) { BIF_ERROR(BIF_P, BADARG); } - if ((modp = erts_get_module(BIF_ARG_1)) == NULL || - modp->code == NULL || - modp->code[MI_ON_LOAD_FUNCTION_PTR] != 0) { - BIF_RET(am_false); + code_ix = erts_active_code_ix(); + if ((modp = erts_get_module(BIF_ARG_1, code_ix)) != NULL) { + if (modp->curr.code != NULL + && modp->curr.code[MI_ON_LOAD_FUNCTION_PTR] == 0) { + res = am_true; + } } - BIF_RET(am_true); + BIF_RET(res); } BIF_RETTYPE pre_loaded_0(BIF_ALIST_0) @@ -282,27 +537,28 @@ BIF_RETTYPE pre_loaded_0(BIF_ALIST_0) BIF_RETTYPE loaded_0(BIF_ALIST_0) { + ErtsCodeIndex code_ix = erts_active_code_ix(); + Module* modp; Eterm previous = NIL; Eterm* hp; int i; int j = 0; - - for (i = 0; i < module_code_size(); i++) { - if (module_code(i) != NULL && - ((module_code(i)->code_length != 0) || - (module_code(i)->old_code_length != 0))) { + + for (i = 0; i < module_code_size(code_ix); i++) { + if ((modp = module_code(i, code_ix)) != NULL && + ((modp->curr.code_length != 0) || + (modp->old.code_length != 0))) { j++; } } if (j > 0) { hp = HAlloc(BIF_P, j*2); - for (i = 0; i < module_code_size(); i++) { - if (module_code(i) != NULL && - ((module_code(i)->code_length != 0) || - (module_code(i)->old_code_length != 0))) { - previous = CONS(hp, make_atom(module_code(i)->module), - previous); + for (i = 0; i < module_code_size(code_ix); i++) { + if ((modp=module_code(i,code_ix)) != NULL && + ((modp->curr.code_length != 0) || + (modp->old.code_length != 0))) { + previous = CONS(hp, make_atom(modp->module), previous); hp += 2; } } @@ -312,54 +568,65 @@ BIF_RETTYPE loaded_0(BIF_ALIST_0) BIF_RETTYPE call_on_load_function_1(BIF_ALIST_1) { - Module* modp = erts_get_module(BIF_ARG_1); - Eterm on_load; + Module* modp = erts_get_module(BIF_ARG_1, erts_active_code_ix()); - if (!modp || modp->code == 0) { - error: - BIF_ERROR(BIF_P, BADARG); + if (modp && modp->curr.code) { + BIF_TRAP_CODE_PTR_0(BIF_P, modp->curr.code[MI_ON_LOAD_FUNCTION_PTR]); } - if ((on_load = modp->code[MI_ON_LOAD_FUNCTION_PTR]) == 0) { - goto error; + else { + BIF_ERROR(BIF_P, BADARG); } - BIF_TRAP_CODE_PTR_0(BIF_P, on_load); } BIF_RETTYPE finish_after_on_load_2(BIF_ALIST_2) { - Module* modp = erts_get_module(BIF_ARG_1); + ErtsCodeIndex code_ix; + Module* modp; Eterm on_load; - if (!modp || modp->code == 0) { + if (!erts_try_seize_code_write_permission(BIF_P)) { + ERTS_BIF_YIELD2(bif_export[BIF_finish_after_on_load_2], + BIF_P, BIF_ARG_1, BIF_ARG_2); + } + + /* ToDo: Use code_ix staging instead of thread blocking */ + + erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN); + erts_smp_thr_progress_block(); + + code_ix = erts_active_code_ix(); + modp = erts_get_module(BIF_ARG_1, code_ix); + + if (!modp || modp->curr.code == 0) { error: + erts_smp_thr_progress_unblock(); + erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN); + erts_release_code_write_permission(); BIF_ERROR(BIF_P, BADARG); } - if ((on_load = modp->code[MI_ON_LOAD_FUNCTION_PTR]) == 0) { + if ((on_load = modp->curr.code[MI_ON_LOAD_FUNCTION_PTR]) == 0) { goto error; } if (BIF_ARG_2 != am_false && BIF_ARG_2 != am_true) { goto error; } - erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN); - erts_smp_thr_progress_block(); - if (BIF_ARG_2 == am_true) { int i; /* * The on_load function succeded. Fix up export entries. */ - for (i = 0; i < export_list_size(); i++) { - Export *ep = export_list(i); + for (i = 0; i < export_list_size(code_ix); i++) { + Export *ep = export_list(i,code_ix); if (ep != NULL && ep->code[0] == BIF_ARG_1 && ep->code[4] != 0) { - ep->address = (void *) ep->code[4]; + ep->addressv[code_ix] = (void *) ep->code[4]; ep->code[4] = 0; } } - modp->code[MI_ON_LOAD_FUNCTION_PTR] = 0; + modp->curr.code[MI_ON_LOAD_FUNCTION_PTR] = 0; set_default_trace_pattern(BIF_ARG_1); } else if (BIF_ARG_2 == am_false) { BeamInstr* code; @@ -370,19 +637,21 @@ BIF_RETTYPE finish_after_on_load_2(BIF_ALIST_2) * This is an combination of delete and purge. We purge * the current code; the old code is not touched. */ - erts_total_code_size -= modp->code_length; - code = modp->code; - end = (BeamInstr *)((char *)code + modp->code_length); + erts_total_code_size -= modp->curr.code_length; + code = modp->curr.code; + end = (BeamInstr *)((char *)code + modp->curr.code_length); erts_cleanup_funs_on_purge(code, end); - beam_catches_delmod(modp->catches, code, modp->code_length); + beam_catches_delmod(modp->curr.catches, code, modp->curr.code_length, + erts_active_code_ix()); erts_free(ERTS_ALC_T_CODE, (void *) code); - modp->code = NULL; - modp->code_length = 0; - modp->catches = BEAM_CATCHES_NIL; - remove_from_address_table(code); + modp->curr.code = NULL; + modp->curr.code_length = 0; + modp->curr.catches = BEAM_CATCHES_NIL; + erts_remove_from_ranges(code); } erts_smp_thr_progress_unblock(); erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN); + erts_release_code_write_permission(); BIF_RET(am_true); } @@ -427,10 +696,10 @@ check_process_code(Process* rp, Module* modp) /* * Pick up limits for the module. */ - start = modp->old_code; - end = (BeamInstr *)((char *)start + modp->old_code_length); + start = modp->old.code; + end = (BeamInstr *)((char *)start + modp->old.code_length); mod_start = (char *) start; - mod_size = modp->old_code_length; + mod_size = modp->old.code_length; /* * Check if current instruction or continuation pointer points into module. @@ -562,10 +831,10 @@ check_process_code(Process* rp, Module* modp) done_gc = 1; FLAGS(rp) |= F_NEED_FULLSWEEP; (void) erts_garbage_collect(rp, 0, rp->arg_reg, rp->arity); - literals = (Eterm *) modp->old_code[MI_LITERALS_START]; - lit_size = (Eterm *) modp->old_code[MI_LITERALS_END] - literals; + literals = (Eterm *) modp->old.code[MI_LITERALS_START]; + lit_size = (Eterm *) modp->old.code[MI_LITERALS_END] - literals; oh = (struct erl_off_heap_header *) - modp->old_code[MI_LITERALS_OFF_HEAP]; + modp->old.code[MI_LITERALS_OFF_HEAP]; erts_garbage_collect_literals(rp, literals, lit_size, oh); } } @@ -624,53 +893,82 @@ any_heap_refs(Eterm* start, Eterm* end, char* mod_start, Uint mod_size) #undef in_area - -static int -purge_module(int module) +BIF_RETTYPE purge_module_1(BIF_ALIST_1) { + ErtsCodeIndex code_ix; BeamInstr* code; BeamInstr* end; Module* modp; + int is_blocking = 0; + Eterm ret; - /* - * Correct module? - */ - - if ((modp = erts_get_module(make_atom(module))) == NULL) { - return -2; + if (is_not_atom(BIF_ARG_1)) { + BIF_ERROR(BIF_P, BADARG); } - /* - * Any code to purge? - */ - if (modp->old_code == 0) { - return -1; + if (!erts_try_seize_code_write_permission(BIF_P)) { + ERTS_BIF_YIELD1(bif_export[BIF_purge_module_1], BIF_P, BIF_ARG_1); } + code_ix = erts_active_code_ix(); + /* - * Unload any NIF library + * Correct module? */ - if (modp->old_nif != NULL) { - erts_unload_nif(modp->old_nif); - modp->old_nif = NULL; + + if ((modp = erts_get_module(BIF_ARG_1, code_ix)) == NULL) { + ERTS_BIF_PREP_ERROR(ret, BIF_P, BADARG); } + else { + erts_rwlock_old_code(code_ix); - /* - * Remove the old code. - */ - ASSERT(erts_total_code_size >= modp->old_code_length); - erts_total_code_size -= modp->old_code_length; - code = modp->old_code; - end = (BeamInstr *)((char *)code + modp->old_code_length); - erts_cleanup_funs_on_purge(code, end); - beam_catches_delmod(modp->old_catches, code, modp->old_code_length); - decrement_refc(code); - erts_free(ERTS_ALC_T_CODE, (void *) code); - modp->old_code = NULL; - modp->old_code_length = 0; - modp->old_catches = BEAM_CATCHES_NIL; - remove_from_address_table(code); - return 0; + /* + * Any code to purge? + */ + if (modp->old.code == 0) { + ERTS_BIF_PREP_ERROR(ret, BIF_P, BADARG); + } + else { + /* + * Unload any NIF library + */ + if (modp->old.nif != NULL) { + /* ToDo: Do unload nif without blocking */ + erts_rwunlock_old_code(code_ix); + erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN); + erts_smp_thr_progress_block(); + is_blocking = 1; + erts_rwlock_old_code(code_ix); + erts_unload_nif(modp->old.nif); + modp->old.nif = NULL; + } + + /* + * Remove the old code. + */ + ASSERT(erts_total_code_size >= modp->old.code_length); + erts_total_code_size -= modp->old.code_length; + code = modp->old.code; + end = (BeamInstr *)((char *)code + modp->old.code_length); + erts_cleanup_funs_on_purge(code, end); + beam_catches_delmod(modp->old.catches, code, modp->old.code_length, + code_ix); + decrement_refc(code); + erts_free(ERTS_ALC_T_CODE, (void *) code); + modp->old.code = NULL; + modp->old.code_length = 0; + modp->old.catches = BEAM_CATCHES_NIL; + erts_remove_from_ranges(code); + ERTS_BIF_PREP_RET(ret, am_true); + } + erts_rwunlock_old_code(code_ix); + } + if (is_blocking) { + erts_smp_thr_progress_unblock(); + erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN); + } + erts_release_code_write_permission(); + return ret; } static void @@ -690,92 +988,50 @@ decrement_refc(BeamInstr* code) } } -static void -remove_from_address_table(BeamInstr* code) -{ - int i; - - for (i = 0; i < num_loaded_modules; i++) { - if (modules[i].start == code) { - num_loaded_modules--; - while (i < num_loaded_modules) { - modules[i] = modules[i+1]; - i++; - } - mid_module = &modules[num_loaded_modules/2]; - return; - } - } - ASSERT(0); /* Not found? */ -} - - /* - * Move code from current to old. + * Move code from current to old and null all export entries for the module */ -static void -delete_code(Process *c_p, ErtsProcLocks c_p_locks, Module* modp) -{ -#ifdef ERTS_ENABLE_LOCK_CHECK -#ifdef ERTS_SMP - if (c_p && c_p_locks) - erts_proc_lc_chk_only_proc_main(c_p); - else -#endif - erts_lc_check_exact(NULL, 0); -#endif - - /* - * Clear breakpoints if any - */ - if (modp->code != NULL && modp->code[MI_NUM_BREAKPOINTS] > 0) { - if (c_p && c_p_locks) - erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_MAIN); - erts_smp_thr_progress_block(); - erts_clear_module_break(modp); - modp->code[MI_NUM_BREAKPOINTS] = 0; - erts_smp_thr_progress_unblock(); - if (c_p && c_p_locks) - erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_MAIN); - } - modp->old_code = modp->code; - modp->old_code_length = modp->code_length; - modp->old_catches = modp->catches; - modp->old_nif = modp->nif; - modp->code = NULL; - modp->code_length = 0; - modp->catches = BEAM_CATCHES_NIL; - modp->nif = NULL; -} - - -/* null all references on the export table for the module called with the - atom index below */ - static void -delete_export_references(Eterm module) +delete_code(Module* modp) { + ErtsCodeIndex code_ix = erts_staging_code_ix(); + Eterm module = make_atom(modp->module); int i; - ASSERT(is_atom(module)); - - for (i = 0; i < export_list_size(); i++) { - Export *ep = export_list(i); + for (i = 0; i < export_list_size(code_ix); i++) { + Export *ep = export_list(i, code_ix); if (ep != NULL && (ep->code[0] == module)) { - if (ep->address == ep->code+3 && - (ep->code[3] == (BeamInstr) em_apply_bif)) { - continue; + if (ep->addressv[code_ix] == ep->code+3) { + if (ep->code[3] == (BeamInstr) em_apply_bif) { + continue; + } + else if (ep->code[3] == (BeamInstr) em_call_traced_function) { + ERTS_SMP_LC_ASSERT(erts_smp_thr_progress_is_blocking()); + ASSERT(modp->curr.num_traced_exports > 0); + --modp->curr.num_traced_exports; + MatchSetUnref(ep->match_prog_set); + ep->match_prog_set = NULL; + } + else ASSERT(ep->code[3] == (BeamInstr) em_call_error_handler + || !erts_initialized); } - ep->address = ep->code+3; + ep->addressv[code_ix] = ep->code+3; ep->code[3] = (BeamInstr) em_call_error_handler; ep->code[4] = 0; - MatchSetUnref(ep->match_prog_set); - ep->match_prog_set = NULL; + ASSERT(ep->match_prog_set == NULL); } } + + ASSERT(modp->curr.num_breakpoints == 0); + ASSERT(modp->curr.num_traced_exports == 0); + modp->old = modp->curr; + modp->curr.code = NULL; + modp->curr.code_length = 0; + modp->curr.catches = BEAM_CATCHES_NIL; + modp->curr.nif = NULL; } - + Eterm beam_make_current_old(Process *c_p, ErtsProcLocks c_p_locks, Eterm module) @@ -787,11 +1043,10 @@ beam_make_current_old(Process *c_p, ErtsProcLocks c_p_locks, Eterm module) * if not, delete old code; error if old code already exists. */ - if (modp->code != NULL && modp->old_code != NULL) { + if (modp->curr.code != NULL && modp->old.code != NULL) { return am_not_purged; - } else if (modp->old_code == NULL) { /* Make the current version old. */ - delete_code(c_p, c_p_locks, modp); - delete_export_references(module); + } else if (modp->old.code == NULL) { /* Make the current version old. */ + delete_code(modp); } return NIL; } diff --git a/erts/emulator/beam/beam_bp.c b/erts/emulator/beam/beam_bp.c index d772bea02f..26dadfbbc0 100644 --- a/erts/emulator/beam/beam_bp.c +++ b/erts/emulator/beam/beam_bp.c @@ -478,15 +478,16 @@ erts_find_local_func(Eterm mfa[3]) { BeamInstr* code_ptr; Uint i,n; - if ((modp = erts_get_module(mfa[0])) == NULL) + if ((modp = erts_get_module(mfa[0], erts_active_code_ix())) == NULL) return NULL; - if ((code_base = (BeamInstr **) modp->code) == NULL) + if ((code_base = (BeamInstr **) modp->curr.code) == NULL) return NULL; n = (BeamInstr) code_base[MI_NUM_FUNCTIONS]; for (i = 0; i < n; ++i) { code_ptr = code_base[MI_FUNCTIONS+i]; ASSERT(((BeamInstr) BeamOp(op_i_func_info_IaaI)) == code_ptr[0]); - ASSERT(mfa[0] == ((Eterm) code_ptr[2])); + ASSERT(mfa[0] == ((Eterm) code_ptr[2]) || + is_nil((Eterm) code_ptr[2])); if (mfa[1] == ((Eterm) code_ptr[3]) && ((BeamInstr) mfa[2]) == code_ptr[4]) { return code_ptr + 5; @@ -713,7 +714,7 @@ void erts_trace_time_break(Process *p, BeamInstr *pc, BpDataTime *bdt, Uint type BpDataTime *pbdt = NULL; ASSERT(p); - ASSERT(p->status == P_RUNNING); + ASSERT(ERTS_PSFLG_RUNNING & erts_smp_atomic32_read_acqb(&p->state)); /* get previous timestamp and breakpoint * from the process psd */ @@ -849,12 +850,13 @@ static int set_break(Eterm mfa[3], int specified, { Module *modp; int num_processed = 0; + ErtsCodeIndex code_ix = erts_active_code_ix(); if (!specified) { /* Find and process all modules in the system... */ int current; - int last = module_code_size(); + int last = module_code_size(code_ix); for (current = 0; current < last; current++) { - modp = module_code(current); + modp = module_code(current, code_ix); ASSERT(modp != NULL); num_processed += set_module_break(modp, mfa, specified, @@ -863,7 +865,7 @@ static int set_break(Eterm mfa[3], int specified, } } else { /* Process a single module */ - if ((modp = erts_get_module(mfa[0])) != NULL) { + if ((modp = erts_get_module(mfa[0], code_ix)) != NULL) { num_processed += set_module_break(modp, mfa, specified, match_spec, break_op, count_op, @@ -883,7 +885,7 @@ static int set_module_break(Module *modp, Eterm mfa[3], int specified, ASSERT(break_op); ASSERT(modp); - code_base = (BeamInstr **) modp->code; + code_base = (BeamInstr **) modp->curr.code; if (code_base == NULL) { return 0; } @@ -913,10 +915,10 @@ static int set_function_break(Module *modp, BeamInstr *pc, int bif, Uint ix = 0; if (bif == BREAK_IS_ERL) { - code_base = (BeamInstr **)modp->code; + code_base = (BeamInstr **)modp->curr.code; ASSERT(code_base); ASSERT(code_base <= (BeamInstr **)pc); - ASSERT((BeamInstr **)pc < code_base + (modp->code_length/sizeof(BeamInstr *))); + ASSERT((BeamInstr **)pc < code_base + (modp->curr.code_length/sizeof(BeamInstr *))); } else { ASSERT(*pc == (BeamInstr) em_apply_bif); ASSERT(modp == NULL); @@ -1097,29 +1099,30 @@ static int set_function_break(Module *modp, BeamInstr *pc, int bif, } if (bif == BREAK_IS_ERL) { - ++(*(BeamInstr*)&code_base[MI_NUM_BREAKPOINTS]); + ++modp->curr.num_breakpoints; } return 1; } static int clear_break(Eterm mfa[3], int specified, BeamInstr break_op) { + ErtsCodeIndex code_ix = erts_active_code_ix(); int num_processed = 0; Module *modp; if (!specified) { /* Iterate over all modules */ int current; - int last = module_code_size(); + int last = module_code_size(code_ix); for (current = 0; current < last; current++) { - modp = module_code(current); + modp = module_code(current, code_ix); ASSERT(modp != NULL); num_processed += clear_module_break(modp, mfa, specified, break_op); } } else { /* Process a single module */ - if ((modp = erts_get_module(mfa[0])) != NULL) { + if ((modp = erts_get_module(mfa[0], code_ix)) != NULL) { num_processed += clear_module_break(modp, mfa, specified, break_op); } @@ -1136,7 +1139,7 @@ static int clear_module_break(Module *m, Eterm mfa[3], int specified, BeamInstr n; ASSERT(m); - code_base = (BeamInstr **) m->code; + code_base = (BeamInstr **) m->curr.code; if (code_base == NULL) { return 0; } @@ -1160,10 +1163,10 @@ static int clear_function_break(Module *m, BeamInstr *pc, int bif, BeamInstr bre BeamInstr **code_base = NULL; if (bif == BREAK_IS_ERL) { - code_base = (BeamInstr **)m->code; + code_base = (BeamInstr **)m->curr.code; ASSERT(code_base); ASSERT(code_base <= (BeamInstr **)pc); - ASSERT((BeamInstr **)pc < code_base + (m->code_length/sizeof(BeamInstr *))); + ASSERT((BeamInstr **)pc < code_base + (m->curr.code_length/sizeof(BeamInstr *))); } else { ASSERT(*pc == (BeamInstr) em_apply_bif); ASSERT(m == NULL); @@ -1255,7 +1258,7 @@ static int clear_function_break(Module *m, BeamInstr *pc, int bif, BeamInstr bre for (j = 0; j < bdt->hash[i].n; ++j) { item = &(bdt->hash[i].item[j]); if (item->pid != NIL) { - h_p = process_tab[internal_pid_index(item->pid)]; + h_p = erts_proc_lookup(item->pid); if (h_p) { pbt = ERTS_PROC_SET_CALL_TIME(h_p, ERTS_PROC_LOCK_MAIN, NULL); if (pbt) { @@ -1273,8 +1276,8 @@ static int clear_function_break(Module *m, BeamInstr *pc, int bif, BeamInstr bre } Free(bd); if (bif == BREAK_IS_ERL) { - ASSERT(((BeamInstr) code_base[MI_NUM_BREAKPOINTS]) > 0); - --(*(BeamInstr*)&code_base[MI_NUM_BREAKPOINTS]); + ASSERT(m->curr.num_breakpoints > 0); + --m->curr.num_breakpoints; } if (*rs) { for (ix = 1; ix < erts_no_schedulers; ++ix) { diff --git a/erts/emulator/beam/beam_catches.c b/erts/emulator/beam/beam_catches.c index 406ef1db5f..92f7ffe5a2 100644 --- a/erts/emulator/beam/beam_catches.c +++ b/erts/emulator/beam/beam_catches.c @@ -31,78 +31,144 @@ typedef struct { unsigned cdr; } beam_catch_t; -static int free_list; -static unsigned high_mark; -static unsigned tabsize; -static beam_catch_t *beam_catches; +#ifdef DEBUG +# define IF_DEBUG(x) x +#else +# define IF_DEBUG(x) +#endif + +struct bc_pool { + int free_list; + unsigned high_mark; + unsigned tabsize; + beam_catch_t *beam_catches; + /* + * Note that the 'beam_catches' area is shared by pools. Used slots + * are readonly as long as the module is not purgable. The free-list is + * protected by the code_ix lock. + */ + + IF_DEBUG(int is_staging;) +}; + +static struct bc_pool bccix[ERTS_NUM_CODE_IX]; void beam_catches_init(void) { - tabsize = DEFAULT_TABSIZE; - free_list = -1; - high_mark = 0; + int i; + + bccix[0].tabsize = DEFAULT_TABSIZE; + bccix[0].free_list = -1; + bccix[0].high_mark = 0; + bccix[0].beam_catches = erts_alloc(ERTS_ALC_T_CODE, + sizeof(beam_catch_t)*DEFAULT_TABSIZE); + IF_DEBUG(bccix[0].is_staging = 0); + for (i=1; i<ERTS_NUM_CODE_IX; i++) { + bccix[i] = bccix[i-1]; + } + /* For initial load: */ + IF_DEBUG(bccix[erts_staging_code_ix()].is_staging = 1); +} - beam_catches = erts_alloc(ERTS_ALC_T_CODE, sizeof(beam_catch_t)*DEFAULT_TABSIZE); + +static void gc_old_vec(beam_catch_t* vec) +{ + int i; + for (i=0; i<ERTS_NUM_CODE_IX; i++) { + if (bccix[i].beam_catches == vec) { + return; + } + } + erts_free(ERTS_ALC_T_CODE, vec); +} + + +void beam_catches_start_staging(void) +{ + ErtsCodeIndex dst = erts_staging_code_ix(); + ErtsCodeIndex src = erts_active_code_ix(); + beam_catch_t* prev_vec = bccix[dst].beam_catches; + + ASSERT(!bccix[src].is_staging && !bccix[dst].is_staging); + + bccix[dst] = bccix[src]; + gc_old_vec(prev_vec); + IF_DEBUG(bccix[dst].is_staging = 1); +} + +void beam_catches_end_staging(int commit) +{ + IF_DEBUG(bccix[erts_staging_code_ix()].is_staging = 0); } unsigned beam_catches_cons(BeamInstr *cp, unsigned cdr) { int i; + struct bc_pool* p = &bccix[erts_staging_code_ix()]; + ASSERT(p->is_staging); /* * Allocate from free_list while it is non-empty. * If free_list is empty, allocate at high_mark. - * - * This avoids the need to initialise the free list in - * beam_catches_init(), which would cost O(TABSIZ) time. */ - if( free_list >= 0 ) { - i = free_list; - free_list = beam_catches[i].cdr; - } else if( high_mark < tabsize ) { - i = high_mark; - high_mark++; - } else { - /* No free slots and table is full: realloc table */ - tabsize = 2*tabsize; - beam_catches = erts_realloc(ERTS_ALC_T_CODE, beam_catches, sizeof(beam_catch_t)*tabsize); - i = high_mark; - high_mark++; + if (p->free_list >= 0) { + i = p->free_list; + p->free_list = p->beam_catches[i].cdr; + } + else { + if (p->high_mark >= p->tabsize) { + /* No free slots and table is full: realloc table */ + beam_catch_t* prev_vec = p->beam_catches; + unsigned newsize = p->tabsize*2; + + p->beam_catches = erts_alloc(ERTS_ALC_T_CODE, + newsize*sizeof(beam_catch_t)); + sys_memcpy(p->beam_catches, prev_vec, + p->tabsize*sizeof(beam_catch_t)); + gc_old_vec(prev_vec); + p->tabsize = newsize; + } + i = p->high_mark++; } - beam_catches[i].cp = cp; - beam_catches[i].cdr = cdr; + p->beam_catches[i].cp = cp; + p->beam_catches[i].cdr = cdr; return i; } BeamInstr *beam_catches_car(unsigned i) { - if( i >= tabsize ) { + struct bc_pool* p = &bccix[erts_active_code_ix()]; + + if (i >= p->tabsize ) { erl_exit(1, "beam_catches_delmod: index %#x is out of range\r\n", i); } - return beam_catches[i].cp; + return p->beam_catches[i].cp; } -void beam_catches_delmod(unsigned head, BeamInstr *code, unsigned code_bytes) +void beam_catches_delmod(unsigned head, BeamInstr *code, unsigned code_bytes, + ErtsCodeIndex code_ix) { + struct bc_pool* p = &bccix[code_ix]; unsigned i, cdr; + ASSERT((code_ix == erts_active_code_ix()) != bccix[erts_staging_code_ix()].is_staging); for(i = head; i != (unsigned)-1;) { - if( i >= tabsize ) { + if (i >= p->tabsize) { erl_exit(1, "beam_catches_delmod: index %#x is out of range\r\n", i); } - if( (char*)beam_catches[i].cp - (char*)code >= code_bytes ) { + if( (char*)p->beam_catches[i].cp - (char*)code >= code_bytes ) { erl_exit(1, "beam_catches_delmod: item %#x has cp %#lx which is not " "in module's range [%#lx,%#lx[\r\n", - i, (long)beam_catches[i].cp, + i, (long)p->beam_catches[i].cp, (long)code, (long)((char*)code + code_bytes)); } - beam_catches[i].cp = 0; - cdr = beam_catches[i].cdr; - beam_catches[i].cdr = free_list; - free_list = i; + p->beam_catches[i].cp = 0; + cdr = p->beam_catches[i].cdr; + p->beam_catches[i].cdr = p->free_list; + p->free_list = i; i = cdr; } } diff --git a/erts/emulator/beam/beam_catches.h b/erts/emulator/beam/beam_catches.h index 6223427f0d..b2bd2351a5 100644 --- a/erts/emulator/beam/beam_catches.h +++ b/erts/emulator/beam/beam_catches.h @@ -20,12 +20,21 @@ #ifndef __BEAM_CATCHES_H #define __BEAM_CATCHES_H +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif +#include "sys.h" +#include "code_ix.h" + #define BEAM_CATCHES_NIL (-1) void beam_catches_init(void); +void beam_catches_start_staging(void); +void beam_catches_end_staging(int commit); unsigned beam_catches_cons(BeamInstr* cp, unsigned cdr); BeamInstr *beam_catches_car(unsigned i); -void beam_catches_delmod(unsigned head, BeamInstr* code, unsigned code_bytes); +void beam_catches_delmod(unsigned head, BeamInstr* code, unsigned code_bytes, + ErtsCodeIndex); #define catch_pc(x) beam_catches_car(catch_val((x))) diff --git a/erts/emulator/beam/beam_debug.c b/erts/emulator/beam/beam_debug.c index 8041c92162..e69cbc3048 100644 --- a/erts/emulator/beam/beam_debug.c +++ b/erts/emulator/beam/beam_debug.c @@ -114,6 +114,10 @@ erts_debug_breakpoint_2(BIF_ALIST_2) mfa[2] = signed_val(mfa[2]); } + if (!erts_try_seize_code_write_permission(BIF_P)) { + ERTS_BIF_YIELD2(bif_export[BIF_erts_debug_breakpoint_2], + BIF_P, BIF_ARG_1, BIF_ARG_2); + } erts_smp_proc_unlock(p, ERTS_PROC_LOCK_MAIN); erts_smp_thr_progress_block(); @@ -125,7 +129,7 @@ erts_debug_breakpoint_2(BIF_ALIST_2) erts_smp_thr_progress_unblock(); erts_smp_proc_lock(p, ERTS_PROC_LOCK_MAIN); - + erts_release_code_write_permission(); return res; error: @@ -207,6 +211,7 @@ erts_debug_disassemble_1(BIF_ALIST_1) BIF_RET(am_false); } } else if (is_tuple(addr)) { + ErtsCodeIndex code_ix; Module* modp; Eterm mod; Eterm name; @@ -225,14 +230,14 @@ erts_debug_disassemble_1(BIF_ALIST_1) goto error; } arity = signed_val(tp[3]); - modp = erts_get_module(mod); + code_ix = erts_active_code_ix(); + modp = erts_get_module(mod, code_ix); /* * Try the export entry first to allow disassembly of special functions * such as erts_debug:apply/4. Then search for it in the module. */ - - if ((ep = erts_find_function(mod, name, arity)) != NULL) { + if ((ep = erts_find_function(mod, name, arity, code_ix)) != NULL) { /* XXX: add "&& ep->address != ep->code+3" condition? * Consider a traced function. * Its ep will have ep->address == ep->code+3. @@ -241,9 +246,9 @@ erts_debug_disassemble_1(BIF_ALIST_1) * But this code_ptr will point to the start of the Export, * not the function's func_info instruction. BOOM !? */ - code_ptr = ((BeamInstr *) ep->address) - 5; + code_ptr = ((BeamInstr *) ep->addressv[code_ix]) - 5; funcinfo = code_ptr+2; - } else if (modp == NULL || (code_base = modp->code) == NULL) { + } else if (modp == NULL || (code_base = modp->curr.code) == NULL) { BIF_RET(am_undef); } else { n = code_base[MI_NUM_FUNCTIONS]; diff --git a/erts/emulator/beam/beam_emu.c b/erts/emulator/beam/beam_emu.c index 6d3b15cd46..15a937289d 100644 --- a/erts/emulator/beam/beam_emu.c +++ b/erts/emulator/beam/beam_emu.c @@ -63,11 +63,7 @@ # define PROCESS_MAIN_CHK_LOCKS(P) \ do { \ if ((P)) { \ - erts_pix_lock_t *pix_lock__ = ERTS_PIX2PIXLOCK(internal_pid_index((P)->id));\ erts_proc_lc_chk_only_proc_main((P)); \ - erts_pix_lock(pix_lock__); \ - ASSERT(0 < (P)->lock.refc && (P)->lock.refc < erts_no_schedulers*5);\ - erts_pix_unlock(pix_lock__); \ } \ else \ erts_lc_check_exact(NULL, 0); \ @@ -495,7 +491,7 @@ extern int count_instructions; do { \ if (FCALLS > 0) { \ Eterm* dis_next; \ - SET_I(((Export *) Arg(0))->address); \ + SET_I(((Export *) Arg(0))->addressv[erts_active_code_ix()]); \ dis_next = (Eterm *) *I; \ FCALLS--; \ CHECK_ARGS(I); \ @@ -504,7 +500,7 @@ extern int count_instructions; && FCALLS > neg_o_reds) { \ goto save_calls1; \ } else { \ - SET_I(((Export *) Arg(0))->address); \ + SET_I(((Export *) Arg(0))->addressv[erts_active_code_ix()]); \ CHECK_ARGS(I); \ goto context_switch; \ } \ @@ -1507,7 +1503,7 @@ void process_main(void) */ #ifdef USE_VM_CALL_PROBES if (DTRACE_ENABLED(global_function_entry)) { - BeamInstr* fp = (BeamInstr *) (((Export *) Arg(0))->address); + BeamInstr* fp = (BeamInstr *) (((Export *) Arg(0))->addressv[erts_active_code_ix()]); DTRACE_GLOBAL_CALL(c_p, (Eterm)fp[-3], (Eterm)fp[-2], fp[-1]); } #endif @@ -1522,7 +1518,7 @@ void process_main(void) SET_CP(c_p, I+2); #ifdef USE_VM_CALL_PROBES if (DTRACE_ENABLED(global_function_entry)) { - BeamInstr* fp = (BeamInstr *) (((Export *) Arg(0))->address); + BeamInstr* fp = (BeamInstr *) (((Export *) Arg(0))->addressv[erts_active_code_ix()]); DTRACE_GLOBAL_CALL(c_p, (Eterm)fp[-3], (Eterm)fp[-2], fp[-1]); } #endif @@ -1535,7 +1531,7 @@ void process_main(void) OpCase(i_call_ext_only_e): #ifdef USE_VM_CALL_PROBES if (DTRACE_ENABLED(global_function_entry)) { - BeamInstr* fp = (BeamInstr *) (((Export *) Arg(0))->address); + BeamInstr* fp = (BeamInstr *) (((Export *) Arg(0))->addressv[erts_active_code_ix()]); DTRACE_GLOBAL_CALL(c_p, (Eterm)fp[-3], (Eterm)fp[-2], fp[-1]); } #endif @@ -1826,13 +1822,12 @@ void process_main(void) msgp = PEEK_MESSAGE(c_p); if (msgp) erts_smp_proc_unlock(c_p, ERTS_PROC_LOCKS_MSG_RECEIVE); - else { + else #endif + { SET_I((BeamInstr *) Arg(0)); Goto(*I); /* Jump to a wait or wait_timeout instruction */ -#ifdef ERTS_SMP } -#endif } ErtsMoveMsgAttachmentIntoProc(msgp, c_p, E, HTOP, FCALLS, { @@ -2061,11 +2056,11 @@ void process_main(void) OpCase(wait_f): wait2: { - ASSERT(!ERTS_PROC_IS_EXITING(c_p)); c_p->i = (BeamInstr *) Arg(0); /* L1 */ SWAPOUT; c_p->arity = 0; - c_p->status = P_WAITING; + erts_smp_atomic32_read_band_relb(&c_p->state, ~ERTS_PSFLG_ACTIVE); + ASSERT(!ERTS_PROC_IS_EXITING(c_p)); erts_smp_proc_unlock(c_p, ERTS_PROC_LOCKS_MSG_RECEIVE); c_p->current = NULL; goto do_schedule; @@ -3144,10 +3139,6 @@ void process_main(void) c_p->arg_reg[0] = r(0); SWAPOUT; c_p->i = I; - erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_STATUS); - if (c_p->status != P_SUSPENDED) - erts_add_to_runq(c_p); - erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_STATUS); goto do_schedule1; } @@ -5110,9 +5101,6 @@ void process_main(void) c_p->arity = 1; /* One living register (the 'true' return value) */ SWAPOUT; c_p->i = I + 1; /* Next instruction */ - erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_STATUS); - erts_add_to_runq(c_p); - erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_STATUS); c_p->current = NULL; goto do_schedule; } @@ -5234,7 +5222,7 @@ void process_main(void) save_calls(c_p, (Export *) Arg(0)); - SET_I(((Export *) Arg(0))->address); + SET_I(((Export *) Arg(0))->addressv[erts_active_code_ix()]); dis_next = (Eterm *) *I; FCALLS--; @@ -5911,7 +5899,8 @@ call_error_handler(Process* p, BeamInstr* fi, Eterm* reg, Eterm func) /* * Search for the error_handler module. */ - ep = erts_find_function(erts_proc_get_error_handler(p), func, 3); + ep = erts_find_function(erts_proc_get_error_handler(p), func, 3, + erts_active_code_ix()); if (ep == NULL) { /* No error handler */ p->current = fi; p->freason = EXC_UNDEF; @@ -5941,7 +5930,7 @@ call_error_handler(Process* p, BeamInstr* fi, Eterm* reg, Eterm func) reg[0] = fi[0]; reg[1] = fi[1]; reg[2] = args; - return ep->address; + return ep->addressv[erts_active_code_ix()]; } @@ -5955,7 +5944,7 @@ apply_setup_error_handler(Process* p, Eterm module, Eterm function, Uint arity, * there is no error handler module. */ - if ((ep = erts_find_export_entry(erts_proc_get_error_handler(p), + if ((ep = erts_active_export_entry(erts_proc_get_error_handler(p), am_undefined_function, 3)) == NULL) { return NULL; } else { @@ -6062,7 +6051,7 @@ apply(Process* p, Eterm module, Eterm function, Eterm args, Eterm* reg) * Note: All BIFs have export entries; thus, no special case is needed. */ - if ((ep = erts_find_export_entry(module, function, arity)) == NULL) { + if ((ep = erts_active_export_entry(module, function, arity)) == NULL) { if ((ep = apply_setup_error_handler(p, module, function, arity, reg)) == NULL) goto error; } else if (ERTS_PROC_GET_SAVED_CALLS_BUF(p)) { save_calls(p, ep); @@ -6070,11 +6059,11 @@ apply(Process* p, Eterm module, Eterm function, Eterm args, Eterm* reg) #ifdef USE_VM_CALL_PROBES if (DTRACE_ENABLED(global_function_entry)) { - BeamInstr *fptr = (BeamInstr *) ep->address; + BeamInstr *fptr = (BeamInstr *) ep->addressv[erts_active_code_ix()]; DTRACE_GLOBAL_CALL(p, (Eterm)fptr[-3], (Eterm)fptr[-2], (Uint)fptr[-1]); } #endif - return ep->address; + return ep->addressv[erts_active_code_ix()]; } static BeamInstr* @@ -6116,7 +6105,7 @@ fixed_apply(Process* p, Eterm* reg, Uint arity) * Note: All BIFs have export entries; thus, no special case is needed. */ - if ((ep = erts_find_export_entry(module, function, arity)) == NULL) { + if ((ep = erts_active_export_entry(module, function, arity)) == NULL) { if ((ep = apply_setup_error_handler(p, module, function, arity, reg)) == NULL) goto error; } else if (ERTS_PROC_GET_SAVED_CALLS_BUF(p)) { @@ -6125,11 +6114,11 @@ fixed_apply(Process* p, Eterm* reg, Uint arity) #ifdef USE_VM_CALL_PROBES if (DTRACE_ENABLED(global_function_entry)) { - BeamInstr *fptr = (BeamInstr *) ep->address; + BeamInstr *fptr = (BeamInstr *) ep->addressv[erts_active_code_ix()]; DTRACE_GLOBAL_CALL(p, (Eterm)fptr[-3], (Eterm)fptr[-2], (Uint)fptr[-1]); } #endif - return ep->address; + return ep->addressv[erts_active_code_ix()]; } int @@ -6206,9 +6195,7 @@ erts_hibernate(Process* c_p, Eterm module, Eterm function, Eterm args, Eterm* re */ erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_MSGQ|ERTS_PROC_LOCK_STATUS); ERTS_SMP_MSGQ_MV_INQ2PRIVQ(c_p); - if (c_p->msg.len > 0) { - erts_add_to_runq(c_p); - } else { + if (!c_p->msg.len) { erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_MSGQ|ERTS_PROC_LOCK_STATUS); c_p->fvalue = NIL; PROCESS_MAIN_CHK_LOCKS(c_p); @@ -6216,14 +6203,12 @@ erts_hibernate(Process* c_p, Eterm module, Eterm function, Eterm args, Eterm* re ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p); PROCESS_MAIN_CHK_LOCKS(c_p); erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_MSGQ|ERTS_PROC_LOCK_STATUS); - ASSERT(!ERTS_PROC_IS_EXITING(c_p)); #ifdef ERTS_SMP ERTS_SMP_MSGQ_MV_INQ2PRIVQ(c_p); - if (c_p->msg.len > 0) - erts_add_to_runq(c_p); - else + if (!c_p->msg.len) #endif - c_p->status = P_WAITING; + erts_smp_atomic32_read_band_relb(&c_p->state, ~ERTS_PSFLG_ACTIVE); + ASSERT(!ERTS_PROC_IS_EXITING(c_p)); } erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_MSGQ|ERTS_PROC_LOCK_STATUS); c_p->current = bif_export[BIF_hibernate_3]->code; @@ -6311,7 +6296,7 @@ call_fun(Process* p, /* Current process. */ Export* ep; Module* modp; Eterm module; - + ErtsCodeIndex code_ix = erts_active_code_ix(); /* * No arity. There is no module loaded that defines the fun, @@ -6319,9 +6304,9 @@ call_fun(Process* p, /* Current process. */ * representation (the module has never been loaded), * or the module defining the fun has been unloaded. */ - module = fe->module; - if ((modp = erts_get_module(module)) != NULL && modp->code != NULL) { + if ((modp = erts_get_module(module, code_ix)) != NULL + && modp->curr.code != NULL) { /* * There is a module loaded, but obviously the fun is not * defined in it. We must not call the error_handler @@ -6336,7 +6321,7 @@ call_fun(Process* p, /* Current process. */ */ ep = erts_find_function(erts_proc_get_error_handler(p), - am_undefined_lambda, 3); + am_undefined_lambda, 3, code_ix); if (ep == NULL) { /* No error handler */ p->current = NULL; p->freason = EXC_UNDEF; @@ -6346,7 +6331,7 @@ call_fun(Process* p, /* Current process. */ reg[1] = fun; reg[2] = args; reg[3] = NIL; - return ep->address; + return ep->addressv[erts_active_code_ix()]; } } } else if (is_export_header(hdr)) { @@ -6358,7 +6343,7 @@ call_fun(Process* p, /* Current process. */ if (arity == actual_arity) { DTRACE_GLOBAL_CALL(p, ep->code[0], ep->code[1], (Uint)ep->code[2]); - return ep->address; + return ep->addressv[erts_active_code_ix()]; } else { /* * Wrong arity. First build a list of the arguments. @@ -6409,8 +6394,8 @@ call_fun(Process* p, /* Current process. */ erts_send_warning_to_logger(p->group_leader, dsbufp); } - if ((ep = erts_find_export_entry(module, function, arity)) == NULL) { - ep = erts_find_export_entry(erts_proc_get_error_handler(p), + if ((ep = erts_active_export_entry(module, function, arity)) == NULL) { + ep = erts_active_export_entry(erts_proc_get_error_handler(p), am_undefined_function, 3); if (ep == NULL) { p->freason = EXC_UNDEF; @@ -6434,7 +6419,7 @@ call_fun(Process* p, /* Current process. */ reg[2] = args; } DTRACE_GLOBAL_CALL(p, module, function, arity); - return ep->address; + return ep->addressv[erts_active_code_ix()]; } else { badfun: p->current = NULL; @@ -6537,7 +6522,8 @@ erts_is_builtin(Eterm Mod, Eterm Name, int arity) if ((ep = export_get(&e)) == NULL) { return 0; } - return ep->address == ep->code+3 && (ep->code[3] == (BeamInstr) em_apply_bif); + return ep->addressv[erts_active_code_ix()] == ep->code+3 + && (ep->code[3] == (BeamInstr) em_apply_bif); } diff --git a/erts/emulator/beam/beam_load.c b/erts/emulator/beam/beam_load.c index dd788df6e4..d3f55a2ba4 100644 --- a/erts/emulator/beam/beam_load.c +++ b/erts/emulator/beam/beam_load.c @@ -352,27 +352,6 @@ typedef struct LoaderState { int loc_size; /* Size of location info in bytes (2/4) */ } LoaderState; -/* - * Layout of the line table. - */ - -#define MI_LINE_FNAME_PTR 0 -#define MI_LINE_LOC_TAB 1 -#define MI_LINE_LOC_SIZE 2 -#define MI_LINE_FUNC_TAB 3 - -#define LINE_INVALID_LOCATION (0) - -/* - * Macros for manipulating locations. - */ - -#define IS_VALID_LOCATION(File, Line) \ - ((unsigned) (File) < 255 && (unsigned) (Line) < ((1 << 24) - 1)) -#define MAKE_LOCATION(File, Line) (((File) << 24) | (Line)) -#define LOC_FILE(Loc) ((Loc) >> 24) -#define LOC_LINE(Loc) ((Loc) & ((1 << 24)-1)) - #define GetTagAndValue(Stp, Tag, Val) \ do { \ BeamInstr __w; \ @@ -496,7 +475,8 @@ typedef struct LoaderState { } while (0) -static void free_state(LoaderState* stp); +static void free_loader_state(Binary* magic); +static void loader_state_dtor(Binary* magic); static Eterm insert_new_code(Process *c_p, ErtsProcLocks c_p_locks, Eterm group_leader, Eterm module, BeamInstr* code, Uint size); @@ -507,6 +487,7 @@ static int verify_chunks(LoaderState* stp); static int load_atom_table(LoaderState* stp); static int load_import_table(LoaderState* stp); static int read_export_table(LoaderState* stp); +static int is_bif(Eterm mod, Eterm func, unsigned arity); static int read_lambda_table(LoaderState* stp); static int read_literal_table(LoaderState* stp); static int read_line_table(LoaderState* stp); @@ -548,22 +529,9 @@ static Eterm native_addresses(Process* p, Eterm mod); int patch_funentries(Eterm Patchlist); int patch(Eterm Addresses, Uint fe); static int safe_mul(UWord a, UWord b, UWord* resp); -static void lookup_loc(FunctionInfo* fi, BeamInstr* pc, - BeamInstr* modp, int idx); - static int must_swap_floats; -/* - * The following variables keep a sorted list of address ranges for - * each module. It allows us to quickly find a function given an - * instruction pointer. - */ -Range* modules = NULL; /* Sorted lists of module addresses. */ -int num_loaded_modules; /* Number of loaded modules. */ -int allocated_modules; /* Number of slots allocated. */ -Range* mid_module = NULL; /* Cached search start point */ - Uint erts_total_code_size; /**********************************************************************/ @@ -579,11 +547,7 @@ void init_load(void) f.fd = 1.0; must_swap_floats = (f.fw[0] == 0); - allocated_modules = 128; - modules = (Range *) erts_alloc(ERTS_ALC_T_MODULE_REFS, - allocated_modules*sizeof(Range)); - mid_module = modules; - num_loaded_modules = 0; + erts_init_ranges(); } static void @@ -595,7 +559,7 @@ define_file(LoaderState* stp, char* name, int idx) } Eterm -erts_load_module(Process *c_p, +erts_preload_module(Process *c_p, ErtsProcLocks c_p_locks, Eterm group_leader, /* Group leader or NIL if none. */ Eterm* modp, /* @@ -605,15 +569,16 @@ erts_load_module(Process *c_p, byte* code, /* Points to the code to load */ Uint size) /* Size of code to load. */ { - LoaderState* stp = erts_alloc_loader_state(); + Binary* magic = erts_alloc_loader_state(); Eterm retval; - retval = erts_prepare_loading(stp, c_p, group_leader, modp, + ASSERT(!erts_initialized); + retval = erts_prepare_loading(magic, c_p, group_leader, modp, code, size); if (retval != NIL) { return retval; } - return erts_finish_loading(stp, c_p, c_p_locks, modp); + return erts_finish_loading(magic, c_p, c_p_locks, modp); } /* #define LOAD_MEMORY_HARD_DEBUG 1*/ @@ -629,11 +594,13 @@ extern void check_allocated_block(Uint type, void *blk); #endif Eterm -erts_prepare_loading(LoaderState* stp, Process *c_p, Eterm group_leader, +erts_prepare_loading(Binary* magic, Process *c_p, Eterm group_leader, Eterm* modp, byte* code, Uint unloaded_size) { Eterm retval = am_badfile; + LoaderState* stp; + stp = ERTS_MAGIC_BIN_DATA(magic); stp->module = *modp; stp->group_leader = group_leader; @@ -666,7 +633,7 @@ erts_prepare_loading(LoaderState* stp, Process *c_p, Eterm group_leader, /* * Initialize code area. */ - stp->code_buffer_size = erts_next_heap_size(2048 + stp->num_functions, 0); + stp->code_buffer_size = 2048 + stp->num_functions; stp->code = (BeamInstr *) erts_alloc(ERTS_ALC_T_CODE, sizeof(BeamInstr) * stp->code_buffer_size); @@ -679,8 +646,6 @@ erts_prepare_loading(LoaderState* stp, Process *c_p, Eterm group_leader, stp->code[MI_COMPILE_PTR] = 0; stp->code[MI_COMPILE_SIZE] = 0; stp->code[MI_COMPILE_SIZE_ON_HEAP] = 0; - stp->code[MI_NUM_BREAKPOINTS] = 0; - /* * Read the atom table. @@ -774,23 +739,24 @@ erts_prepare_loading(LoaderState* stp, Process *c_p, Eterm group_leader, load_error: if (retval != NIL) { - free_state(stp); + free_loader_state(magic); } return retval; } Eterm -erts_finish_loading(LoaderState* stp, Process* c_p, +erts_finish_loading(Binary* magic, Process* c_p, ErtsProcLocks c_p_locks, Eterm* modp) { Eterm retval; + LoaderState* stp = ERTS_MAGIC_BIN_DATA(magic); /* * No other process may run since we will update the export * table which is not protected by any locks. */ - ERTS_SMP_LC_ASSERT(erts_initialized == 0 || + ERTS_SMP_LC_ASSERT(erts_initialized == 0 || erts_is_code_ix_locked() || erts_smp_thr_progress_is_blocking()); /* @@ -811,7 +777,6 @@ erts_finish_loading(LoaderState* stp, Process* c_p, * exported and imported functions. This can't fail. */ - erts_export_consolidate(); CHKBLK(ERTS_ALC_T_CODE,stp->code); final_touch(stp); @@ -837,16 +802,20 @@ erts_finish_loading(LoaderState* stp, Process* c_p, } load_error: - free_state(stp); + free_loader_state(magic); return retval; } -LoaderState* +Binary* erts_alloc_loader_state(void) { LoaderState* stp; + Binary* magic; - stp = erts_alloc(ERTS_ALC_T_LOADER_TMP, sizeof(LoaderState)); + magic = erts_create_magic_binary(sizeof(LoaderState), + loader_state_dtor); + erts_refc_inc(&magic->refc, 1); + stp = ERTS_MAGIC_BIN_DATA(magic); stp->bin = NULL; stp->function = THE_NON_VALUE; /* Function not known yet */ stp->arity = 0; @@ -875,76 +844,123 @@ erts_alloc_loader_state(void) stp->line_instr = 0; stp->func_line = 0; stp->fname = 0; - return stp; + return magic; +} + +/* + * Return the module name (a tagged atom) for the prepared code + * in the magic binary, or NIL if the binary does not contain + * prepared code. + */ +Eterm +erts_module_for_prepared_code(Binary* magic) +{ + LoaderState* stp; + + if (ERTS_MAGIC_BIN_DESTRUCTOR(magic) != loader_state_dtor) { + return NIL; + } + stp = ERTS_MAGIC_BIN_DATA(magic); + if (stp->code != 0) { + return stp->module; + } else { + return NIL; + } } static void -free_state(LoaderState* stp) +free_loader_state(Binary* magic) { + loader_state_dtor(magic); + if (erts_refc_dectest(&magic->refc, 0) == 0) { + erts_bin_free(magic); + } +} + +/* + * This destructor function can safely be called multiple times. + */ +static void +loader_state_dtor(Binary* magic) +{ + LoaderState* stp = ERTS_MAGIC_BIN_DATA(magic); + if (stp->bin != 0) { driver_free_binary(stp->bin); + stp->bin = 0; } if (stp->code != 0) { erts_free(ERTS_ALC_T_CODE, stp->code); + stp->code = 0; } - if (stp->labels != NULL) { - erts_free(ERTS_ALC_T_LOADER_TMP, (void *) stp->labels); + if (stp->labels != 0) { + erts_free(ERTS_ALC_T_PREPARED_CODE, (void *) stp->labels); + stp->labels = 0; } - if (stp->atom != NULL) { - erts_free(ERTS_ALC_T_LOADER_TMP, (void *) stp->atom); + if (stp->atom != 0) { + erts_free(ERTS_ALC_T_PREPARED_CODE, (void *) stp->atom); + stp->atom = 0; } - if (stp->import != NULL) { - erts_free(ERTS_ALC_T_LOADER_TMP, (void *) stp->import); + if (stp->import != 0) { + erts_free(ERTS_ALC_T_PREPARED_CODE, (void *) stp->import); + stp->import = 0; } - if (stp->export != NULL) { - erts_free(ERTS_ALC_T_LOADER_TMP, (void *) stp->export); + if (stp->export != 0) { + erts_free(ERTS_ALC_T_PREPARED_CODE, (void *) stp->export); + stp->export = 0; } if (stp->lambdas != stp->def_lambdas) { - erts_free(ERTS_ALC_T_LOADER_TMP, (void *) stp->lambdas); + erts_free(ERTS_ALC_T_PREPARED_CODE, (void *) stp->lambdas); + stp->lambdas = stp->def_lambdas; } - if (stp->literals != NULL) { + if (stp->literals != 0) { int i; for (i = 0; i < stp->num_literals; i++) { - if (stp->literals[i].heap != NULL) { - erts_free(ERTS_ALC_T_LOADER_TMP, + if (stp->literals[i].heap != 0) { + erts_free(ERTS_ALC_T_PREPARED_CODE, (void *) stp->literals[i].heap); + stp->literals[i].heap = 0; } } - erts_free(ERTS_ALC_T_LOADER_TMP, (void *) stp->literals); + erts_free(ERTS_ALC_T_PREPARED_CODE, (void *) stp->literals); + stp->literals = 0; } - while (stp->literal_patches != NULL) { + while (stp->literal_patches != 0) { LiteralPatch* next = stp->literal_patches->next; - erts_free(ERTS_ALC_T_LOADER_TMP, (void *) stp->literal_patches); + erts_free(ERTS_ALC_T_PREPARED_CODE, (void *) stp->literal_patches); stp->literal_patches = next; } - while (stp->string_patches != NULL) { + while (stp->string_patches != 0) { StringPatch* next = stp->string_patches->next; - erts_free(ERTS_ALC_T_LOADER_TMP, (void *) stp->string_patches); + erts_free(ERTS_ALC_T_PREPARED_CODE, (void *) stp->string_patches); stp->string_patches = next; } - while (stp->genop_blocks) { - GenOpBlock* next = stp->genop_blocks->next; - erts_free(ERTS_ALC_T_LOADER_TMP, (void *) stp->genop_blocks); - stp->genop_blocks = next; - } if (stp->line_item != 0) { - erts_free(ERTS_ALC_T_LOADER_TMP, stp->line_item); + erts_free(ERTS_ALC_T_PREPARED_CODE, stp->line_item); + stp->line_item = 0; } if (stp->line_instr != 0) { - erts_free(ERTS_ALC_T_LOADER_TMP, stp->line_instr); + erts_free(ERTS_ALC_T_PREPARED_CODE, stp->line_instr); + stp->line_instr = 0; } if (stp->func_line != 0) { - erts_free(ERTS_ALC_T_LOADER_TMP, stp->func_line); + erts_free(ERTS_ALC_T_PREPARED_CODE, stp->func_line); + stp->func_line = 0; } if (stp->fname != 0) { - erts_free(ERTS_ALC_T_LOADER_TMP, stp->fname); + erts_free(ERTS_ALC_T_PREPARED_CODE, stp->fname); + stp->fname = 0; } - erts_free(ERTS_ALC_T_LOADER_TMP, stp); + /* + * The following data items should have been freed earlier. + */ + + ASSERT(stp->genop_blocks == 0); } static Eterm @@ -954,7 +970,6 @@ insert_new_code(Process *c_p, ErtsProcLocks c_p_locks, { Module* modp; Eterm retval; - int i; if ((retval = beam_make_current_old(c_p, c_p_locks, module)) != NIL) { erts_dsprintf_buf_t *dsbufp = erts_create_logger_dsbuf(); @@ -971,30 +986,15 @@ insert_new_code(Process *c_p, ErtsProcLocks c_p_locks, erts_total_code_size += size; modp = erts_put_module(module); - modp->code = code; - modp->code_length = size; - modp->catches = BEAM_CATCHES_NIL; /* Will be filled in later. */ + modp->curr.code = code; + modp->curr.code_length = size; + modp->curr.catches = BEAM_CATCHES_NIL; /* Will be filled in later. */ /* - * Update address table (used for finding a function from a PC value). + * Update ranges (used for finding a function from a PC value). */ - if (num_loaded_modules == allocated_modules) { - allocated_modules *= 2; - modules = (Range *) erts_realloc(ERTS_ALC_T_MODULE_REFS, - (void *) modules, - allocated_modules * sizeof(Range)); - } - for (i = num_loaded_modules; i > 0; i--) { - if (code > modules[i-1].start) { - break; - } - modules[i] = modules[i-1]; - } - modules[i].start = code; - modules[i].end = (BeamInstr *) (((byte *)code) + size); - num_loaded_modules++; - mid_module = &modules[num_loaded_modules/2]; + erts_update_ranges(code, size); return NIL; } @@ -1217,9 +1217,8 @@ load_atom_table(LoaderState* stp) GetInt(stp, 4, stp->num_atoms); stp->num_atoms++; - stp->atom = erts_alloc(ERTS_ALC_T_LOADER_TMP, - erts_next_heap_size((stp->num_atoms*sizeof(Eterm)), - 0)); + stp->atom = erts_alloc(ERTS_ALC_T_PREPARED_CODE, + stp->num_atoms*sizeof(Eterm)); /* * Read all atoms. @@ -1263,10 +1262,8 @@ load_import_table(LoaderState* stp) int i; GetInt(stp, 4, stp->num_imports); - stp->import = erts_alloc(ERTS_ALC_T_LOADER_TMP, - erts_next_heap_size((stp->num_imports * - sizeof(ImportEntry)), - 0)); + stp->import = erts_alloc(ERTS_ALC_T_PREPARED_CODE, + stp->num_imports * sizeof(ImportEntry)); for (i = 0; i < stp->num_imports; i++) { int n; Eterm mod; @@ -1296,7 +1293,7 @@ load_import_table(LoaderState* stp) * If the export entry refers to a BIF, get the pointer to * the BIF function. */ - if ((e = erts_find_export_entry(mod, func, arity)) != NULL) { + if ((e = erts_active_export_entry(mod, func, arity)) != NULL) { if (e->code[3] == (BeamInstr) em_apply_bif) { stp->import[i].bf = (BifFunction) e->code[4]; if (func == am_load_nif && mod == am_erlang && arity == 2) { @@ -1315,16 +1312,8 @@ load_import_table(LoaderState* stp) static int read_export_table(LoaderState* stp) { - static struct { - Eterm mod; - Eterm func; - int arity; - } allow_redef[] = { - /* The BIFs that are allowed to be redefined by Erlang code */ - {am_erlang,am_apply,2}, - {am_erlang,am_apply,3}, - }; int i; + BeamInstr* address; GetInt(stp, 4, stp->num_exps); if (stp->num_exps > stp->num_functions) { @@ -1332,7 +1321,7 @@ read_export_table(LoaderState* stp) stp->num_exps, stp->num_functions); } stp->export - = (ExportEntry *) erts_alloc(ERTS_ALC_T_LOADER_TMP, + = (ExportEntry *) erts_alloc(ERTS_ALC_T_PREPARED_CODE, (stp->num_exps * sizeof(ExportEntry))); for (i = 0; i < stp->num_exps; i++) { @@ -1340,7 +1329,6 @@ read_export_table(LoaderState* stp) Uint value; Eterm func; Uint arity; - Export* e; GetInt(stp, 4, n); GetAtom(stp, n, func); @@ -1358,29 +1346,34 @@ read_export_table(LoaderState* stp) if (value == 0) { LoadError2(stp, "export table entry %d: label %d not resolved", i, n); } - stp->export[i].address = stp->code + value; + stp->export[i].address = address = stp->code + value; /* - * Check that we are not redefining a BIF (except the ones allowed to - * redefine). + * Find out if there is a BIF with the same name. */ - if ((e = erts_find_export_entry(stp->module, func, arity)) != NULL) { - if (e->code[3] == (BeamInstr) em_apply_bif) { - int j; - for (j = 0; j < sizeof(allow_redef)/sizeof(allow_redef[0]); j++) { - if (stp->module == allow_redef[j].mod && - func == allow_redef[j].func && - arity == allow_redef[j].arity) { - break; - } - } - if (j == sizeof(allow_redef)/sizeof(allow_redef[0])) { - LoadError2(stp, "exported function %T/%d redefines BIF", - func, arity); - } - } + if (!is_bif(stp->module, func, arity)) { + continue; + } + + /* + * This is a stub for a BIF. + * + * It should not be exported, and the information in its + * func_info instruction should be invalidated so that it + * can be filtered out by module_info(functions) and by + * any other functions that walk through all local functions. + */ + + if (stp->labels[n].patches) { + LoadError3(stp, "there are local calls to the stub for " + "the BIF %T:%T/%d", + stp->module, func, arity); } + stp->export[i].address = NULL; + address[-1] = 0; + address[-2] = NIL; + address[-3] = NIL; } return 1; @@ -1388,15 +1381,39 @@ read_export_table(LoaderState* stp) return 0; } + +static int +is_bif(Eterm mod, Eterm func, unsigned arity) +{ + Export* e = erts_active_export_entry(mod, func, arity); + if (e == NULL) { + return 0; + } + if (e->code[3] != (BeamInstr) em_apply_bif) { + return 0; + } + if (mod == am_erlang && func == am_apply && arity == 3) { + /* + * erlang:apply/3 is a special case -- it is implemented + * as an instruction and it is OK to redefine it. + */ + return 0; + } + return 1; +} + static int read_lambda_table(LoaderState* stp) { int i; GetInt(stp, 4, stp->num_lambdas); - stp->lambdas_allocated = stp->num_lambdas; - stp->lambdas = (Lambda *) erts_alloc(ERTS_ALC_T_LOADER_TMP, - stp->num_lambdas * sizeof(Lambda)); + if (stp->num_lambdas > stp->lambdas_allocated) { + ASSERT(stp->lambdas == stp->def_lambdas); + stp->lambdas_allocated = stp->num_lambdas; + stp->lambdas = (Lambda *) erts_alloc(ERTS_ALC_T_PREPARED_CODE, + stp->num_lambdas * sizeof(Lambda)); + } for (i = 0; i < stp->num_lambdas; i++) { Uint n; Uint32 Index; @@ -1446,7 +1463,7 @@ read_literal_table(LoaderState* stp) stp->file_p = uncompressed; stp->file_left = (unsigned) uncompressed_sz; GetInt(stp, 4, stp->num_literals); - stp->literals = (Literal *) erts_alloc(ERTS_ALC_T_LOADER_TMP, + stp->literals = (Literal *) erts_alloc(ERTS_ALC_T_PREPARED_CODE, stp->num_literals * sizeof(Literal)); stp->allocated_literals = stp->num_literals; @@ -1466,7 +1483,7 @@ read_literal_table(LoaderState* stp) if ((heap_size = erts_decode_ext_size(p, sz)) < 0) { LoadError1(stp, "literal %d: bad external format", i); } - hp = stp->literals[i].heap = erts_alloc(ERTS_ALC_T_LOADER_TMP, + hp = stp->literals[i].heap = erts_alloc(ERTS_ALC_T_PREPARED_CODE, heap_size*sizeof(Eterm)); stp->literals[i].off_heap.first = 0; stp->literals[i].off_heap.overhead = 0; @@ -1538,7 +1555,7 @@ read_line_table(LoaderState* stp) */ num_line_items++; - lp = (BeamInstr *) erts_alloc(ERTS_ALC_T_LOADER_TMP, + lp = (BeamInstr *) erts_alloc(ERTS_ALC_T_PREPARED_CODE, num_line_items * sizeof(BeamInstr)); stp->line_item = lp; stp->num_line_items = num_line_items; @@ -1594,7 +1611,7 @@ read_line_table(LoaderState* stp) */ if (stp->num_fnames != 0) { - stp->fname = (Eterm *) erts_alloc(ERTS_ALC_T_LOADER_TMP, + stp->fname = (Eterm *) erts_alloc(ERTS_ALC_T_PREPARED_CODE, stp->num_fnames * sizeof(Eterm)); for (i = 0; i < stp->num_fnames; i++) { @@ -1610,11 +1627,11 @@ read_line_table(LoaderState* stp) /* * Allocate the arrays to be filled while code is being loaded. */ - stp->line_instr = (LineInstr *) erts_alloc(ERTS_ALC_T_LOADER_TMP, + stp->line_instr = (LineInstr *) erts_alloc(ERTS_ALC_T_PREPARED_CODE, stp->num_line_instrs * sizeof(LineInstr)); stp->current_li = 0; - stp->func_line = (int *) erts_alloc(ERTS_ALC_T_LOADER_TMP, + stp->func_line = (int *) erts_alloc(ERTS_ALC_T_PREPARED_CODE, stp->num_functions * sizeof(int)); @@ -1677,7 +1694,7 @@ read_code_header(LoaderState* stp) * Initialize label table. */ - stp->labels = (Label *) erts_alloc(ERTS_ALC_T_LOADER_TMP, + stp->labels = (Label *) erts_alloc(ERTS_ALC_T_PREPARED_CODE, stp->num_labels * sizeof(Label)); for (i = 0; i < stp->num_labels; i++) { stp->labels[i].value = 0; @@ -1703,9 +1720,9 @@ read_code_header(LoaderState* stp) #define CodeNeed(w) do { \ ASSERT(ci <= code_buffer_size); \ if (code_buffer_size < ci+(w)) { \ - code_buffer_size = erts_next_heap_size(ci+(w), 0); \ - stp->code = code \ - = (BeamInstr *) erts_realloc(ERTS_ALC_T_CODE, \ + code_buffer_size = 2*ci+(w); \ + stp->code = code = \ + (BeamInstr *) erts_realloc(ERTS_ALC_T_CODE, \ (void *) code, \ code_buffer_size * sizeof(BeamInstr)); \ } \ @@ -1731,6 +1748,7 @@ load_code(LoaderState* stp) GenOp* last_op = NULL; GenOp** last_op_next = NULL; int arity; + int retval = 1; /* * The size of the loaded func_info instruction is needed @@ -2457,7 +2475,11 @@ load_code(LoaderState* stp) case op_int_code_end: stp->code_buffer_size = code_buffer_size; stp->ci = ci; - return 1; + stp->function = THE_NON_VALUE; + stp->genop = NULL; + stp->specific_op = -1; + retval = 1; + goto cleanup; } /* @@ -2471,9 +2493,20 @@ load_code(LoaderState* stp) } } - load_error: - return 0; + retval = 0; + + cleanup: + /* + * Clean up everything that is not needed any longer. + */ + + while (stp->genop_blocks) { + GenOpBlock* next = stp->genop_blocks->next; + erts_free(ERTS_ALC_T_LOADER_TMP, (void *) stp->genop_blocks); + stp->genop_blocks = next; + } + return retval; } @@ -4265,24 +4298,31 @@ final_touch(LoaderState* stp) index = next; } modp = erts_put_module(stp->module); - modp->catches = catches; + modp->curr.catches = catches; /* * Export functions. */ for (i = 0; i < stp->num_exps; i++) { - Export* ep = erts_export_put(stp->module, stp->export[i].function, - stp->export[i].arity); + Export* ep; + BeamInstr* address = stp->export[i].address; + + if (address == NULL) { + /* Skip stub for a BIF */ + continue; + } + ep = erts_export_put(stp->module, stp->export[i].function, + stp->export[i].arity); if (!on_load) { - ep->address = stp->export[i].address; + ep->addressv[erts_staging_code_ix()] = address; } else { /* * Don't make any of the exported functions * callable yet. */ - ep->address = ep->code+3; - ep->code[4] = (BeamInstr) stp->export[i].address; + ep->addressv[erts_staging_code_ix()] = ep->code+3; + ep->code[4] = (BeamInstr) address; } } @@ -4926,7 +4966,7 @@ new_label(LoaderState* stp) int num = stp->num_labels; stp->num_labels++; - stp->labels = (Label *) erts_realloc(ERTS_ALC_T_LOADER_TMP, + stp->labels = (Label *) erts_realloc(ERTS_ALC_T_PREPARED_CODE, (void *) stp->labels, stp->num_labels * sizeof(Label)); stp->labels[num].value = 0; @@ -4937,7 +4977,8 @@ new_label(LoaderState* stp) static void new_literal_patch(LoaderState* stp, int pos) { - LiteralPatch* p = erts_alloc(ERTS_ALC_T_LOADER_TMP, sizeof(LiteralPatch)); + LiteralPatch* p = erts_alloc(ERTS_ALC_T_PREPARED_CODE, + sizeof(LiteralPatch)); p->pos = pos; p->next = stp->literal_patches; stp->literal_patches = p; @@ -4946,7 +4987,7 @@ new_literal_patch(LoaderState* stp, int pos) static void new_string_patch(LoaderState* stp, int pos) { - StringPatch* p = erts_alloc(ERTS_ALC_T_LOADER_TMP, sizeof(StringPatch)); + StringPatch* p = erts_alloc(ERTS_ALC_T_PREPARED_CODE, sizeof(StringPatch)); p->pos = pos; p->next = stp->string_patches; stp->string_patches = p; @@ -4964,14 +5005,14 @@ new_literal(LoaderState* stp, Eterm** hpp, Uint heap_size) ASSERT(stp->num_literals == 0); stp->allocated_literals = 8; need = stp->allocated_literals * sizeof(Literal); - stp->literals = (Literal *) erts_alloc(ERTS_ALC_T_LOADER_TMP, + stp->literals = (Literal *) erts_alloc(ERTS_ALC_T_PREPARED_CODE, need); } else if (stp->allocated_literals <= stp->num_literals) { Uint need; stp->allocated_literals *= 2; need = stp->allocated_literals * sizeof(Literal); - stp->literals = (Literal *) erts_realloc(ERTS_ALC_T_LOADER_TMP, + stp->literals = (Literal *) erts_realloc(ERTS_ALC_T_PREPARED_CODE, (void *) stp->literals, need); } @@ -4980,7 +5021,7 @@ new_literal(LoaderState* stp, Eterm** hpp, Uint heap_size) lit = stp->literals + stp->num_literals; lit->offset = 0; lit->heap_size = heap_size; - lit->heap = erts_alloc(ERTS_ALC_T_LOADER_TMP, heap_size*sizeof(Eterm)); + lit->heap = erts_alloc(ERTS_ALC_T_PREPARED_CODE, heap_size*sizeof(Eterm)); lit->term = make_boxed(lit->heap); lit->off_heap.first = 0; lit->off_heap.overhead = 0; @@ -4999,7 +5040,7 @@ erts_module_info_0(Process* p, Eterm module) return THE_NON_VALUE; } - if (erts_get_module(module) == NULL) { + if (erts_get_module(module, erts_active_code_ix()) == NULL) { return THE_NON_VALUE; } @@ -5054,32 +5095,43 @@ functions_in_module(Process* p, /* Process whose heap to use. */ BeamInstr* code; int i; Uint num_functions; + Uint need; Eterm* hp; + Eterm* hp_end; Eterm result = NIL; if (is_not_atom(mod)) { return THE_NON_VALUE; } - modp = erts_get_module(mod); + modp = erts_get_module(mod, erts_active_code_ix()); if (modp == NULL) { return THE_NON_VALUE; } - code = modp->code; + code = modp->curr.code; num_functions = code[MI_NUM_FUNCTIONS]; - hp = HAlloc(p, 5*num_functions); + need = 5*num_functions; + hp = HAlloc(p, need); + hp_end = hp + need; for (i = num_functions-1; i >= 0 ; i--) { BeamInstr* func_info = (BeamInstr *) code[MI_FUNCTIONS+i]; Eterm name = (Eterm) func_info[3]; int arity = (int) func_info[4]; Eterm tuple; - ASSERT(is_atom(name)); - tuple = TUPLE2(hp, name, make_small(arity)); - hp += 3; - result = CONS(hp, tuple, result); - hp += 2; + /* + * If the function name is [], this entry is a stub for + * a BIF that should be ignored. + */ + ASSERT(is_atom(name) || is_nil(name)); + if (is_atom(name)) { + tuple = TUPLE2(hp, name, make_small(arity)); + hp += 3; + result = CONS(hp, tuple, result); + hp += 2; + } } + HRelease(p, hp_end, hp); return result; } @@ -5106,12 +5158,12 @@ native_addresses(Process* p, Eterm mod) return THE_NON_VALUE; } - modp = erts_get_module(mod); + modp = erts_get_module(mod, erts_active_code_ix()); if (modp == NULL) { return THE_NON_VALUE; } - code = modp->code; + code = modp->curr.code; num_functions = code[MI_NUM_FUNCTIONS]; need = (6+BIG_UINT_HEAP_SIZE)*num_functions; hp = HAlloc(p, need); @@ -5122,9 +5174,11 @@ native_addresses(Process* p, Eterm mod) int arity = (int) func_info[4]; Eterm tuple; - ASSERT(is_atom(name)); + ASSERT(is_atom(name) || is_nil(name)); /* [] if BIF stub */ if (func_info[1] != 0) { - Eterm addr = erts_bld_uint(&hp, NULL, func_info[1]); + Eterm addr; + ASSERT(is_atom(name)); + addr = erts_bld_uint(&hp, NULL, func_info[1]); tuple = erts_bld_tuple(&hp, NULL, 3, name, make_small(arity), addr); result = erts_bld_cons(&hp, NULL, tuple, result); } @@ -5149,18 +5203,20 @@ exported_from_module(Process* p, /* Process whose heap to use. */ Eterm* hp = NULL; Eterm* hend = NULL; Eterm result = NIL; + ErtsCodeIndex code_ix; if (is_not_atom(mod)) { return THE_NON_VALUE; } - for (i = 0; i < export_list_size(); i++) { - Export* ep = export_list(i); + code_ix = erts_active_code_ix(); + for (i = 0; i < export_list_size(code_ix); i++) { + Export* ep = export_list(i,code_ix); if (ep->code[0] == mod) { Eterm tuple; - if (ep->address == ep->code+3 && + if (ep->addressv[code_ix] == ep->code+3 && ep->code[3] == (BeamInstr) em_call_error_handler) { /* There is a call to the function, but it does not exist. */ continue; @@ -5204,11 +5260,11 @@ attributes_for_module(Process* p, /* Process whose heap to use. */ return THE_NON_VALUE; } - modp = erts_get_module(mod); + modp = erts_get_module(mod, erts_active_code_ix()); if (modp == NULL) { return THE_NON_VALUE; } - code = modp->code; + code = modp->curr.code; ext = (byte *) code[MI_ATTR_PTR]; if (ext != NULL) { hp = HAlloc(p, code[MI_ATTR_SIZE_ON_HEAP]); @@ -5244,11 +5300,11 @@ compilation_info_for_module(Process* p, /* Process whose heap to use. */ return THE_NON_VALUE; } - modp = erts_get_module(mod); + modp = erts_get_module(mod, erts_active_code_ix()); if (modp == NULL) { return THE_NON_VALUE; } - code = modp->code; + code = modp->curr.code; ext = (byte *) code[MI_COMPILE_PTR]; if (ext != NULL) { hp = HAlloc(p, code[MI_COMPILE_SIZE_ON_HEAP]); @@ -5263,113 +5319,6 @@ compilation_info_for_module(Process* p, /* Process whose heap to use. */ } /* - * Find a function from the given pc and fill information in - * the FunctionInfo struct. If the full_info is non-zero, fill - * in all available information (including location in the - * source code). If no function is found, the 'current' field - * will be set to NULL. - */ - -void -erts_lookup_function_info(FunctionInfo* fi, BeamInstr* pc, int full_info) -{ - Range* low = modules; - Range* high = low + num_loaded_modules; - Range* mid = mid_module; - - fi->current = NULL; - fi->needed = 5; - fi->loc = LINE_INVALID_LOCATION; - while (low < high) { - if (pc < mid->start) { - high = mid; - } else if (pc > mid->end) { - low = mid + 1; - } else { - BeamInstr** low1 = (BeamInstr **) (mid->start + MI_FUNCTIONS); - BeamInstr** high1 = low1 + mid->start[MI_NUM_FUNCTIONS]; - BeamInstr** mid1; - - while (low1 < high1) { - mid1 = low1 + (high1-low1) / 2; - if (pc < mid1[0]) { - high1 = mid1; - } else if (pc < mid1[1]) { - mid_module = mid; - fi->current = mid1[0]+2; - if (full_info) { - BeamInstr** fp = (BeamInstr **) (mid->start + - MI_FUNCTIONS); - int idx = mid1 - fp; - lookup_loc(fi, pc, mid->start, idx); - } - return; - } else { - low1 = mid1 + 1; - } - } - return; - } - mid = low + (high-low) / 2; - } -} - -static void -lookup_loc(FunctionInfo* fi, BeamInstr* orig_pc, BeamInstr* modp, int idx) -{ - Eterm* line = (Eterm *) modp[MI_LINE_TABLE]; - Eterm* low; - Eterm* high; - Eterm* mid; - Eterm pc; - - if (line == 0) { - return; - } - - pc = (Eterm) (BeamInstr) orig_pc; - fi->fname_ptr = (Eterm *) (BeamInstr) line[MI_LINE_FNAME_PTR]; - low = (Eterm *) (BeamInstr) line[MI_LINE_FUNC_TAB+idx]; - high = (Eterm *) (BeamInstr) line[MI_LINE_FUNC_TAB+idx+1]; - while (high > low) { - mid = low + (high-low) / 2; - if (pc < mid[0]) { - high = mid; - } else if (pc < mid[1]) { - int file; - int index = mid - (Eterm *) (BeamInstr) line[MI_LINE_FUNC_TAB]; - - if (line[MI_LINE_LOC_SIZE] == 2) { - Uint16* loc_table = - (Uint16 *) (BeamInstr) line[MI_LINE_LOC_TAB]; - fi->loc = loc_table[index]; - } else { - Uint32* loc_table = - (Uint32 *) (BeamInstr) line[MI_LINE_LOC_TAB]; - ASSERT(line[MI_LINE_LOC_SIZE] == 4); - fi->loc = loc_table[index]; - } - if (fi->loc == LINE_INVALID_LOCATION) { - return; - } - fi->needed += 3+2+3+2; - file = LOC_FILE(fi->loc); - if (file == 0) { - /* Special case: Module name with ".erl" appended */ - Atom* mod_atom = atom_tab(atom_val(fi->current[0])); - fi->needed += 2*(mod_atom->len+4); - } else { - Atom* ap = atom_tab(atom_val((fi->fname_ptr)[file-1])); - fi->needed += 2*ap->len; - } - return; - } else { - low = mid + 1; - } - } -} - -/* * Build a single {M,F,A,Loction} item to be part of * a stack trace. */ @@ -5449,6 +5398,7 @@ code_get_chunk_2(BIF_ALIST_2) Process* p = BIF_P; Eterm Bin = BIF_ARG_1; Eterm Chunk = BIF_ARG_2; + Binary* magic = 0; LoaderState* stp; Uint chunk = 0; ErlSubBin* sb; @@ -5461,12 +5411,13 @@ code_get_chunk_2(BIF_ALIST_2) Eterm real_bin; byte* temp_alloc = NULL; - stp = erts_alloc_loader_state(); + magic = erts_alloc_loader_state(); + stp = ERTS_MAGIC_BIN_DATA(magic); if ((start = erts_get_aligned_binary_bytes(Bin, &temp_alloc)) == NULL) { error: erts_free_aligned_binary_bytes(temp_alloc); - if (stp) { - free_state(stp); + if (magic) { + free_loader_state(magic); } BIF_ERROR(p, BADARG); } @@ -5511,7 +5462,7 @@ code_get_chunk_2(BIF_ALIST_2) done: erts_free_aligned_binary_bytes(temp_alloc); - free_state(stp); + free_loader_state(magic); return res; } @@ -5524,14 +5475,16 @@ code_module_md5_1(BIF_ALIST_1) { Process* p = BIF_P; Eterm Bin = BIF_ARG_1; + Binary* magic; LoaderState* stp; byte* bytes; byte* temp_alloc = NULL; Eterm res; - stp = erts_alloc_loader_state(); + magic = erts_alloc_loader_state(); + stp = ERTS_MAGIC_BIN_DATA(magic); if ((bytes = erts_get_aligned_binary_bytes(Bin, &temp_alloc)) == NULL) { - free_state(stp); + free_loader_state(magic); BIF_ERROR(p, BADARG); } stp->module = THE_NON_VALUE; /* Suppress diagnostiscs */ @@ -5545,7 +5498,7 @@ code_module_md5_1(BIF_ALIST_1) done: erts_free_aligned_binary_bytes(temp_alloc); - free_state(stp); + free_loader_state(magic); return res; } @@ -5601,7 +5554,7 @@ stub_read_export_table(LoaderState* stp) stp->num_exps, stp->num_functions); } stp->export - = (ExportEntry *) erts_alloc(ERTS_ALC_T_LOADER_TMP, + = (ExportEntry *) erts_alloc(ERTS_ALC_T_PREPARED_CODE, stp->num_exps * sizeof(ExportEntry)); for (i = 0; i < stp->num_exps; i++) { @@ -5627,20 +5580,29 @@ stub_final_touch(LoaderState* stp, BeamInstr* fp) { int i; int n = stp->num_exps; + Eterm mod = fp[2]; Eterm function = fp[3]; int arity = fp[4]; #ifdef HIPE Lambda* lp; #endif + if (is_bif(mod, function, arity)) { + fp[1] = 0; + fp[2] = 0; + fp[3] = 0; + fp[4] = 0; + return; + } + /* * Test if the function should be exported. */ for (i = 0; i < n; i++) { if (stp->export[i].function == function && stp->export[i].arity == arity) { - Export* ep = erts_export_put(fp[2], function, arity); - ep->address = fp+5; + Export* ep = erts_export_put(mod, function, arity); + ep->addressv[erts_staging_code_ix()] = fp+5; return; } } @@ -5819,6 +5781,7 @@ patch_funentries(Eterm Patchlist) Eterm erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info) { + Binary* magic; LoaderState* stp; BeamInstr Funcs; BeamInstr Patchlist; @@ -5840,7 +5803,8 @@ erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info) * Must initialize stp->lambdas here because the error handling code * at label 'error' uses it. */ - stp = erts_alloc_loader_state(); + magic = erts_alloc_loader_state(); + stp = ERTS_MAGIC_BIN_DATA(magic); if (is_not_atom(Mod)) { goto error; @@ -5920,7 +5884,6 @@ erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info) code[MI_COMPILE_PTR] = 0; code[MI_COMPILE_SIZE] = 0; code[MI_COMPILE_SIZE_ON_HEAP] = 0; - code[MI_NUM_BREAKPOINTS] = 0; code[MI_LITERALS_START] = 0; code[MI_LITERALS_END] = 0; code[MI_LITERALS_OFF_HEAP] = 0; @@ -6028,13 +5991,13 @@ erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info) if (patch_funentries(Patchlist)) { erts_free_aligned_binary_bytes(temp_alloc); - free_state(stp); + free_loader_state(magic); return Mod; } error: erts_free_aligned_binary_bytes(temp_alloc); - free_state(stp); + free_loader_state(magic); BIF_ERROR(p, BADARG); } @@ -6051,3 +6014,4 @@ static int safe_mul(UWord a, UWord b, UWord* resp) return (res / b) == a; } } + diff --git a/erts/emulator/beam/beam_load.h b/erts/emulator/beam/beam_load.h index 997ba197db..f1506a8684 100644 --- a/erts/emulator/beam/beam_load.h +++ b/erts/emulator/beam/beam_load.h @@ -50,10 +50,6 @@ extern BeamInstr beam_debug_apply[]; extern BeamInstr* em_call_error_handler; extern BeamInstr* em_apply_bif; extern BeamInstr* em_call_traced_function; -typedef struct { - BeamInstr* start; /* Pointer to start of module. */ - BeamInstr* end; /* Points one word beyond last function in module. */ -} Range; /* * The following variables keep a sorted list of address ranges for @@ -61,11 +57,6 @@ typedef struct { * instruction pointer. */ -extern Range* modules; -extern int num_loaded_modules; -extern int allocated_modules; -extern Range* mid_module; - /* Total code size in bytes */ extern Uint erts_total_code_size; /* @@ -94,27 +85,22 @@ extern Uint erts_total_code_size; #define MI_COMPILE_SIZE_ON_HEAP 6 /* - * Number of breakpoints in module is stored in this word - */ -#define MI_NUM_BREAKPOINTS 7 - -/* * Literal area (constant pool). */ -#define MI_LITERALS_START 8 -#define MI_LITERALS_END 9 -#define MI_LITERALS_OFF_HEAP 10 +#define MI_LITERALS_START 7 +#define MI_LITERALS_END 8 +#define MI_LITERALS_OFF_HEAP 9 /* * Pointer to the on_load function (or NULL if none). */ -#define MI_ON_LOAD_FUNCTION_PTR 11 +#define MI_ON_LOAD_FUNCTION_PTR 10 /* * Pointer to the line table (or NULL if none). */ -#define MI_LINE_TABLE 12 +#define MI_LINE_TABLE 11 /* * Start of function pointer table. This table contains pointers to @@ -125,5 +111,27 @@ extern Uint erts_total_code_size; * this table. */ -#define MI_FUNCTIONS 13 +#define MI_FUNCTIONS 12 + +/* + * Layout of the line table. + */ + +#define MI_LINE_FNAME_PTR 0 +#define MI_LINE_LOC_TAB 1 +#define MI_LINE_LOC_SIZE 2 +#define MI_LINE_FUNC_TAB 3 + +#define LINE_INVALID_LOCATION (0) + +/* + * Macros for manipulating locations. + */ + +#define IS_VALID_LOCATION(File, Line) \ + ((unsigned) (File) < 255 && (unsigned) (Line) < ((1 << 24) - 1)) +#define MAKE_LOCATION(File, Line) (((File) << 24) | (Line)) +#define LOC_FILE(Loc) ((Loc) >> 24) +#define LOC_LINE(Loc) ((Loc) & ((1 << 24)-1)) + #endif /* _BEAM_LOAD_H */ diff --git a/erts/emulator/beam/beam_ranges.c b/erts/emulator/beam/beam_ranges.c new file mode 100644 index 0000000000..0f2d5d0c2a --- /dev/null +++ b/erts/emulator/beam/beam_ranges.c @@ -0,0 +1,349 @@ +/* + * %CopyrightBegin% + * + * Copyright Ericsson AB 2012. All Rights Reserved. + * + * The contents of this file are subject to the Erlang Public License, + * Version 1.1, (the "License"); you may not use this file except in + * compliance with the License. You should have received a copy of the + * Erlang Public License along with this software. If not, it can be + * retrieved online at http://www.erlang.org/. + * + * Software distributed under the License is distributed on an "AS IS" + * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + * the License for the specific language governing rights and limitations + * under the License. + * + * %CopyrightEnd% + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include "sys.h" +#include "erl_vm.h" +#include "global.h" +#include "beam_load.h" + +typedef struct { + BeamInstr* start; /* Pointer to start of module. */ + erts_smp_atomic_t end; /* (BeamInstr*) Points one word beyond last function in module. */ +} Range; + +/* Range 'end' needs to be atomic as we purge module + by setting end=start in active code_ix */ +#define RANGE_END(R) ((BeamInstr*)erts_smp_atomic_read_nob(&(R)->end)) + +static Range* find_range(BeamInstr* pc); +static void lookup_loc(FunctionInfo* fi, BeamInstr* pc, + BeamInstr* modp, int idx); + +/* + * The following variables keep a sorted list of address ranges for + * each module. It allows us to quickly find a function given an + * instruction pointer. + */ +struct ranges { + Range* modules; /* Sorted lists of module addresses. */ + Sint n; /* Number of range entries. */ + Sint allocated; /* Number of allocated entries. */ + erts_smp_atomic_t mid; /* Cached search start point */ +}; +static struct ranges r[ERTS_NUM_CODE_IX]; +static erts_smp_atomic_t mem_used; + +#ifdef HARD_DEBUG +static void check_consistency(struct ranges* p) +{ + int i; + + ASSERT(p->n <= p->allocated); + ASSERT((Uint)(p->mid - p->modules) < p->n || + (p->mid == p->modules && p->n == 0)); + for (i = 0; i < p->n; i++) { + ASSERT(p->modules[i].start <= RANGE_END(&p->modules[i])); + ASSERT(!i || RANGE_END(&p->modules[i-1]) < p->modules[i].start); + } +} +# define CHECK(r) check_consistency(r) +#else +# define CHECK(r) +#endif /* HARD_DEBUG */ + + +void +erts_init_ranges(void) +{ + Sint i; + + erts_smp_atomic_init_nob(&mem_used, 0); + for (i = 0; i < ERTS_NUM_CODE_IX; i++) { + r[i].modules = 0; + r[i].n = 0; + r[i].allocated = 0; + erts_smp_atomic_init_nob(&r[i].mid, 0); + } +} + +void +erts_start_staging_ranges(void) +{ + ErtsCodeIndex dst = erts_staging_code_ix(); + + if (r[dst].modules) { + erts_smp_atomic_add_nob(&mem_used, -r[dst].allocated); + erts_free(ERTS_ALC_T_MODULE_REFS, r[dst].modules); + r[dst].modules = NULL; + } +} + +void +erts_end_staging_ranges(int commit) +{ + ErtsCodeIndex dst = erts_staging_code_ix(); + + if (commit && r[dst].modules == NULL) { + Sint i; + Sint n; + + /* No modules added, just clone src and remove purged code. */ + ErtsCodeIndex src = erts_active_code_ix(); + + erts_smp_atomic_add_nob(&mem_used, r[src].n); + r[dst].modules = erts_alloc(ERTS_ALC_T_MODULE_REFS, + r[src].n * sizeof(Range)); + r[dst].allocated = r[src].n; + n = 0; + for (i = 0; i < r[src].n; i++) { + Range* rp = r[src].modules+i; + if (rp->start < RANGE_END(rp)) { + /* Only insert a module that has not been purged. */ + r[dst].modules[n] = *rp; + n++; + } + } + r[dst].n = n; + erts_smp_atomic_set_nob(&r[dst].mid, + (erts_aint_t) (r[dst].modules + n / 2)); + } +} + +void +erts_update_ranges(BeamInstr* code, Uint size) +{ + ErtsCodeIndex dst = erts_staging_code_ix(); + ErtsCodeIndex src = erts_active_code_ix(); + Sint i; + Sint n; + Sint need; + + if (src == dst) { + ASSERT(!erts_initialized); + + /* + * During start-up of system, the indices are the same. + * Handle this by faking a source area. + */ + src = (src+1) % ERTS_NUM_CODE_IX; + if (r[src].modules) { + erts_smp_atomic_add_nob(&mem_used, -r[src].allocated); + erts_free(ERTS_ALC_T_MODULE_REFS, r[src].modules); + } + r[src] = r[dst]; + r[dst].modules = 0; + } + + CHECK(&r[src]); + + ASSERT(r[dst].modules == NULL); + need = r[dst].allocated = r[src].n + 1; + erts_smp_atomic_add_nob(&mem_used, need); + r[dst].modules = (Range *) erts_alloc(ERTS_ALC_T_MODULE_REFS, + need * sizeof(Range)); + n = 0; + for (i = 0; i < r[src].n; i++) { + Range* rp = r[src].modules+i; + if (code < rp->start) { + r[dst].modules[n].start = code; + erts_smp_atomic_init_nob(&r[dst].modules[n].end, + (erts_aint_t)(((byte *)code) + size)); + ASSERT(!n || RANGE_END(&r[dst].modules[n-1]) < code); + n++; + break; + } + if (rp->start < RANGE_END(rp)) { + /* Only insert a module that has not been purged. */ + r[dst].modules[n].start = rp->start; + erts_smp_atomic_init_nob(&r[dst].modules[n].end, + (erts_aint_t)(RANGE_END(rp))); + ASSERT(!n || RANGE_END(&r[dst].modules[n-1]) < rp->start); + n++; + } + } + + while (i < r[src].n) { + Range* rp = r[src].modules+i; + if (rp->start < RANGE_END(rp)) { + /* Only insert a module that has not been purged. */ + r[dst].modules[n].start = rp->start; + erts_smp_atomic_init_nob(&r[dst].modules[n].end, + (erts_aint_t)(RANGE_END(rp))); + ASSERT(!n || RANGE_END(&r[dst].modules[n-1]) < rp->start); + n++; + } + i++; + } + + if (n == 0 || code > r[dst].modules[n-1].start) { + r[dst].modules[n].start = code; + erts_smp_atomic_init_nob(&r[dst].modules[n].end, + (erts_aint_t)(((byte *)code) + size)); + ASSERT(!n || RANGE_END(&r[dst].modules[n-1]) < code); + n++; + } + + ASSERT(n <= r[src].n+1); + r[dst].n = n; + erts_smp_atomic_set_nob(&r[dst].mid, + (erts_aint_t) (r[dst].modules + n / 2)); + + CHECK(&r[dst]); + CHECK(&r[src]); +} + +void +erts_remove_from_ranges(BeamInstr* code) +{ + Range* rp = find_range(code); + erts_smp_atomic_set_nob(&rp->end, (erts_aint_t)rp->start); +} + +UWord +erts_ranges_sz(void) +{ + return erts_smp_atomic_read_nob(&mem_used) * sizeof(Range); +} + +/* + * Find a function from the given pc and fill information in + * the FunctionInfo struct. If the full_info is non-zero, fill + * in all available information (including location in the + * source code). If no function is found, the 'current' field + * will be set to NULL. + */ + +void +erts_lookup_function_info(FunctionInfo* fi, BeamInstr* pc, int full_info) +{ + BeamInstr** low; + BeamInstr** high; + BeamInstr** mid; + Range* rp; + + fi->current = NULL; + fi->needed = 5; + fi->loc = LINE_INVALID_LOCATION; + rp = find_range(pc); + if (rp == 0) { + return; + } + + low = (BeamInstr **) (rp->start + MI_FUNCTIONS); + high = low + rp->start[MI_NUM_FUNCTIONS]; + while (low < high) { + mid = low + (high-low) / 2; + if (pc < mid[0]) { + high = mid; + } else if (pc < mid[1]) { + fi->current = mid[0]+2; + if (full_info) { + BeamInstr** fp = (BeamInstr **) (rp->start + + MI_FUNCTIONS); + int idx = mid - fp; + lookup_loc(fi, pc, rp->start, idx); + } + return; + } else { + low = mid + 1; + } + } +} + +static Range* +find_range(BeamInstr* pc) +{ + ErtsCodeIndex active = erts_active_code_ix(); + Range* low = r[active].modules; + Range* high = low + r[active].n; + Range* mid = (Range *) erts_smp_atomic_read_nob(&r[active].mid); + + CHECK(&r[active]); + while (low < high) { + if (pc < mid->start) { + high = mid; + } else if (pc > RANGE_END(mid)) { + low = mid + 1; + } else { + erts_smp_atomic_set_nob(&r[active].mid, (erts_aint_t) mid); + return mid; + } + mid = low + (high-low) / 2; + } + return 0; +} + +static void +lookup_loc(FunctionInfo* fi, BeamInstr* orig_pc, BeamInstr* modp, int idx) +{ + Eterm* line = (Eterm *) modp[MI_LINE_TABLE]; + Eterm* low; + Eterm* high; + Eterm* mid; + Eterm pc; + + if (line == 0) { + return; + } + + pc = (Eterm) (BeamInstr) orig_pc; + fi->fname_ptr = (Eterm *) (BeamInstr) line[MI_LINE_FNAME_PTR]; + low = (Eterm *) (BeamInstr) line[MI_LINE_FUNC_TAB+idx]; + high = (Eterm *) (BeamInstr) line[MI_LINE_FUNC_TAB+idx+1]; + while (high > low) { + mid = low + (high-low) / 2; + if (pc < mid[0]) { + high = mid; + } else if (pc < mid[1]) { + int file; + int index = mid - (Eterm *) (BeamInstr) line[MI_LINE_FUNC_TAB]; + + if (line[MI_LINE_LOC_SIZE] == 2) { + Uint16* loc_table = + (Uint16 *) (BeamInstr) line[MI_LINE_LOC_TAB]; + fi->loc = loc_table[index]; + } else { + Uint32* loc_table = + (Uint32 *) (BeamInstr) line[MI_LINE_LOC_TAB]; + ASSERT(line[MI_LINE_LOC_SIZE] == 4); + fi->loc = loc_table[index]; + } + if (fi->loc == LINE_INVALID_LOCATION) { + return; + } + fi->needed += 3+2+3+2; + file = LOC_FILE(fi->loc); + if (file == 0) { + /* Special case: Module name with ".erl" appended */ + Atom* mod_atom = atom_tab(atom_val(fi->current[0])); + fi->needed += 2*(mod_atom->len+4); + } else { + Atom* ap = atom_tab(atom_val((fi->fname_ptr)[file-1])); + fi->needed += 2*ap->len; + } + return; + } else { + low = mid + 1; + } + } +} diff --git a/erts/emulator/beam/bif.c b/erts/emulator/beam/bif.c index fc00b42454..6943c8852c 100644 --- a/erts/emulator/beam/bif.c +++ b/erts/emulator/beam/bif.c @@ -233,15 +233,17 @@ BIF_RETTYPE link_1(BIF_ALIST_1) BIF_ERROR(BIF_P, BADARG); - res_no_proc: - if (BIF_P->flags & F_TRAPEXIT) { - ErtsProcLocks locks = ERTS_PROC_LOCK_MAIN; - erts_deliver_exit_message(BIF_ARG_1, BIF_P, &locks, am_noproc, NIL); - erts_smp_proc_unlock(BIF_P, ~ERTS_PROC_LOCK_MAIN & locks); - BIF_RET(am_true); +res_no_proc: { + erts_aint32_t state = erts_smp_atomic32_read_nob(&BIF_P->state); + if (state & ERTS_PSFLG_TRAP_EXIT) { + ErtsProcLocks locks = ERTS_PROC_LOCK_MAIN; + erts_deliver_exit_message(BIF_ARG_1, BIF_P, &locks, am_noproc, NIL); + erts_smp_proc_unlock(BIF_P, ~ERTS_PROC_LOCK_MAIN & locks); + BIF_RET(am_true); + } + else + BIF_ERROR(BIF_P, EXC_NOPROC); } - else - BIF_ERROR(BIF_P, EXC_NOPROC); } #define ERTS_DEMONITOR_FALSE 2 @@ -1103,8 +1105,9 @@ BIF_RETTYPE hibernate_3(BIF_ALIST_3) if (erts_hibernate(BIF_P, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3, reg)) { /* - * If hibernate succeeded, TRAP. The process will be suspended - * if status is P_WAITING or continue (if any message was in the queue). + * If hibernate succeeded, TRAP. The process will be wait in a + * hibernated state if its state is inactive (!ERTS_PSFLG_ACTIVE); + * otherwise, continue executing (if any message was in the queue). */ BIF_TRAP_CODE_PTR_(BIF_P, BIF_P->i); } @@ -1403,9 +1406,8 @@ BIF_RETTYPE exit_2(BIF_ALIST_2) } else { rp_locks = ERTS_PROC_LOCKS_XSIG_SEND; - rp = erts_pid2proc_opt(BIF_P, ERTS_PROC_LOCK_MAIN, - BIF_ARG_1, rp_locks, - ERTS_P2P_FLG_SMP_INC_REFC); + rp = erts_pid2proc(BIF_P, ERTS_PROC_LOCK_MAIN, + BIF_ARG_1, rp_locks); if (!rp) { BIF_RET(am_true); } @@ -1427,8 +1429,6 @@ BIF_RETTYPE exit_2(BIF_ALIST_2) rp_locks &= ~ERTS_PROC_LOCK_MAIN; if (rp_locks) erts_smp_proc_unlock(rp, rp_locks); - if (rp != BIF_P) - erts_smp_proc_dec_refc(rp); #endif /* * We may have exited ourselves and may have to take action. @@ -1502,14 +1502,13 @@ BIF_RETTYPE process_flag_2(BIF_ALIST_2) BIF_RET(old_value); } else if (BIF_ARG_1 == am_priority) { - erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_STATUS); old_value = erts_set_process_priority(BIF_P, BIF_ARG_2); - erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_STATUS); if (old_value == THE_NON_VALUE) goto error; BIF_RET(old_value); } else if (BIF_ARG_1 == am_trap_exit) { + erts_aint32_t state; Uint trap_exit; if (BIF_ARG_2 == am_true) { trap_exit = 1; @@ -1524,59 +1523,52 @@ BIF_RETTYPE process_flag_2(BIF_ALIST_2) * For more info, see implementation of erts_send_exit_signal(). */ erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_STATUS); + ERTS_SMP_LC_ASSERT((ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS) + & erts_proc_lc_my_proc_locks(BIF_P)); ERTS_SMP_BIF_CHK_PENDING_EXIT(BIF_P, ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS); - old_value = ERTS_PROC_IS_TRAPPING_EXITS(BIF_P) ? am_true : am_false; - if (trap_exit) { - ERTS_PROC_SET_TRAP_EXIT(BIF_P); - } else { - ERTS_PROC_UNSET_TRAP_EXIT(BIF_P); - } + if (trap_exit) + state = erts_smp_atomic32_read_bor_nob(&BIF_P->state, + ERTS_PSFLG_TRAP_EXIT); + else + state = erts_smp_atomic32_read_band_nob(&BIF_P->state, + ~ERTS_PSFLG_TRAP_EXIT); + old_value = (state & ERTS_PSFLG_TRAP_EXIT) ? am_true : am_false; erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_STATUS); BIF_RET(old_value); } else if (BIF_ARG_1 == am_scheduler) { - int yield; - ErtsRunQueue *old; - ErtsRunQueue *new; + ErtsRunQueue *old, *new, *curr; Sint sched; + erts_aint32_t state; + if (!is_small(BIF_ARG_2)) goto error; sched = signed_val(BIF_ARG_2); if (sched < 0 || erts_no_schedulers < sched) goto error; - erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_STATUS); - old = BIF_P->bound_runq; -#ifdef ERTS_SMP - ASSERT(!old || old == BIF_P->run_queue); -#endif - new = !sched ? NULL : erts_schedid2runq(sched); -#ifndef ERTS_SMP - yield = 0; -#else - if (new == old) - yield = 0; + + if (sched == 0) { + new = NULL; + state = erts_smp_atomic32_read_band_mb(&BIF_P->state, + ~ERTS_PSFLG_BOUND); + } else { - ErtsRunQueue *curr = BIF_P->run_queue; - if (!new) - erts_smp_runq_lock(curr); - else - erts_smp_runqs_lock(curr, new); - yield = new && BIF_P->run_queue != new; -#endif - BIF_P->bound_runq = new; + new = erts_schedid2runq(sched); #ifdef ERTS_SMP - if (new) - BIF_P->run_queue = new; - if (!new) - erts_smp_runq_unlock(curr); - else - erts_smp_runqs_unlock(curr, new); - } + erts_atomic_set_nob(&BIF_P->run_queue, (erts_aint_t) new); #endif - erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_STATUS); + state = erts_smp_atomic32_read_bor_mb(&BIF_P->state, + ERTS_PSFLG_BOUND); + } + + curr = ERTS_GET_SCHEDULER_DATA_FROM_PROC(BIF_P)->run_queue; + old = (ERTS_PSFLG_BOUND & state) ? curr : NULL; + + ASSERT(!old || old == curr); + old_value = old ? make_small(old->ix+1) : make_small(0); - if (yield) + if (new && new != curr) ERTS_BIF_YIELD_RETURN_X(BIF_P, old_value, am_scheduler); else BIF_RET(old_value); @@ -1826,8 +1818,7 @@ do_send(Process *p, Eterm to, Eterm msg, int suspend) { if (internal_pid_index(to) >= erts_max_processes) return SEND_BADARG; - rp = erts_pid2proc_opt(p, ERTS_PROC_LOCK_MAIN, - to, 0, ERTS_P2P_FLG_SMP_INC_REFC); + rp = erts_proc_lookup_raw(to); if (!rp) { ERTS_SMP_ASSERT_IS_NOT_EXITING(p); @@ -1865,7 +1856,7 @@ do_send(Process *p, Eterm to, Eterm msg, int suspend) { } erts_whereis_name(p, ERTS_PROC_LOCK_MAIN, to, - &rp, 0, ERTS_P2P_FLG_SMP_INC_REFC, + &rp, 0, 0, &pt); if (pt) { @@ -2017,7 +2008,7 @@ do_send(Process *p, Eterm to, Eterm msg, int suspend) { erts_whereis_name(p, ERTS_PROC_LOCK_MAIN, tp[1], - &rp, 0, ERTS_P2P_FLG_SMP_INC_REFC, + &rp, 0, 0, &pt); if (pt) { portid = pt->id; @@ -2076,7 +2067,6 @@ do_send(Process *p, Eterm to, Eterm msg, int suspend) { p == rp ? (rp_locks & ~ERTS_PROC_LOCK_MAIN) : rp_locks); - erts_smp_proc_dec_refc(rp); return res; } } @@ -3486,7 +3476,7 @@ BIF_RETTYPE garbage_collect_1(BIF_ALIST_1) if (rp == ERTS_PROC_LOCK_BUSY) ERTS_BIF_YIELD1(bif_export[BIF_garbage_collect_1], BIF_P, BIF_ARG_1); #else - rp = erts_pid2proc(BIF_P, 0, BIF_ARG_1, 0); + rp = erts_proc_lookup(BIF_ARG_1); #endif if (!rp) BIF_RET(am_false); @@ -3780,7 +3770,8 @@ BIF_RETTYPE function_exported_3(BIF_ALIST_3) is_not_small(BIF_ARG_3)) { BIF_ERROR(BIF_P, BADARG); } - if (erts_find_function(BIF_ARG_1, BIF_ARG_2, signed_val(BIF_ARG_3)) == NULL) { + if (erts_find_function(BIF_ARG_1, BIF_ARG_2, signed_val(BIF_ARG_3), + erts_active_code_ix()) == NULL) { BIF_RET(am_false); } BIF_RET(am_true); @@ -4216,8 +4207,8 @@ BIF_RETTYPE system_flag_2(BIF_ALIST_2) erts_smp_thr_progress_block(); for (i = 0; i < erts_max_processes; i++) { - if (process_tab[i] != (Process*) 0) { - Process* p = process_tab[i]; + Process *p = erts_pix2proc(i); + if (p) { #ifdef USE_VM_PROBES p->seq_trace_token = (p->dt_utag != NIL) ? am_have_dt_utag : NIL; #else @@ -4513,6 +4504,21 @@ erts_bif_prep_await_proc_exit_apply_trap(Process *c_p, Export bif_return_trap_export; +void erts_init_trap_export(Export* ep, Eterm m, Eterm f, Uint a, + Eterm (*bif)(BIF_ALIST_0)) +{ + int i; + sys_memset((void *) ep, 0, sizeof(Export)); + for (i=0; i<ERTS_NUM_CODE_IX; i++) { + ep->addressv[i] = &ep->code[3]; + } + ep->code[0] = m; + ep->code[1] = f; + ep->code[2] = a; + ep->code[3] = (BeamInstr) em_apply_bif; + ep->code[4] = (BeamInstr) bif; +} + void erts_init_bif(void) { reference0 = 0; @@ -4528,17 +4534,13 @@ void erts_init_bif(void) * yield the calling process traps to. The only thing it does: * return the value passed as argument. */ - sys_memset((void *) &bif_return_trap_export, 0, sizeof(Export)); - bif_return_trap_export.address = &bif_return_trap_export.code[3]; - bif_return_trap_export.code[0] = am_erlang; - bif_return_trap_export.code[1] = am_bif_return_trap; + erts_init_trap_export(&bif_return_trap_export, am_erlang, am_bif_return_trap, #ifdef DEBUG - bif_return_trap_export.code[2] = 2; + 2 #else - bif_return_trap_export.code[2] = 1; + 1 #endif - bif_return_trap_export.code[3] = (BeamInstr) em_apply_bif; - bif_return_trap_export.code[4] = (BeamInstr) &bif_return_trap; + , &bif_return_trap); flush_monitor_message_trap = erts_export_put(am_erlang, am_flush_monitor_message, diff --git a/erts/emulator/beam/bif.h b/erts/emulator/beam/bif.h index d20089a9fb..7cb2c78815 100644 --- a/erts/emulator/beam/bif.h +++ b/erts/emulator/beam/bif.h @@ -125,7 +125,7 @@ do { \ #define ERTS_BIF_PREP_TRAP0(Ret, Trap, Proc) \ do { \ (Proc)->arity = 0; \ - (Proc)->i = (BeamInstr*) ((Trap)->address); \ + (Proc)->i = (BeamInstr*) ((Trap)->addressv[erts_active_code_ix()]); \ (Proc)->freason = TRAP; \ (Ret) = THE_NON_VALUE; \ } while (0) @@ -135,7 +135,7 @@ do { \ Eterm* reg = ERTS_PROC_GET_SCHDATA((Proc))->x_reg_array; \ (Proc)->arity = 1; \ reg[0] = (Eterm) (A0); \ - (Proc)->i = (BeamInstr*) ((Trap)->address); \ + (Proc)->i = (BeamInstr*) ((Trap)->addressv[erts_active_code_ix()]); \ (Proc)->freason = TRAP; \ (Ret) = THE_NON_VALUE; \ } while (0) @@ -146,7 +146,7 @@ do { \ (Proc)->arity = 2; \ reg[0] = (Eterm) (A0); \ reg[1] = (Eterm) (A1); \ - (Proc)->i = (BeamInstr*) ((Trap)->address); \ + (Proc)->i = (BeamInstr*) ((Trap)->addressv[erts_active_code_ix()]); \ (Proc)->freason = TRAP; \ (Ret) = THE_NON_VALUE; \ } while (0) @@ -158,7 +158,7 @@ do { \ reg[0] = (Eterm) (A0); \ reg[1] = (Eterm) (A1); \ reg[2] = (Eterm) (A2); \ - (Proc)->i = (BeamInstr*) ((Trap)->address); \ + (Proc)->i = (BeamInstr*) ((Trap)->addressv[erts_active_code_ix()]); \ (Proc)->freason = TRAP; \ (Ret) = THE_NON_VALUE; \ } while (0) @@ -170,13 +170,13 @@ do { \ reg[0] = (Eterm) (A0); \ reg[1] = (Eterm) (A1); \ reg[2] = (Eterm) (A2); \ - (Proc)->i = (BeamInstr*) ((Trap)->address); \ + (Proc)->i = (BeamInstr*) ((Trap)->addressv[erts_active_code_ix()]); \ (Proc)->freason = TRAP; \ } while (0) #define BIF_TRAP0(p, Trap_) do { \ (p)->arity = 0; \ - (p)->i = (BeamInstr*) ((Trap_)->address); \ + (p)->i = (BeamInstr*) ((Trap_)->addressv[erts_active_code_ix()]); \ (p)->freason = TRAP; \ return THE_NON_VALUE; \ } while(0) @@ -185,7 +185,7 @@ do { \ Eterm* reg = ERTS_PROC_GET_SCHDATA((p))->x_reg_array; \ (p)->arity = 1; \ reg[0] = (A0); \ - (p)->i = (BeamInstr*) ((Trap_)->address); \ + (p)->i = (BeamInstr*) ((Trap_)->addressv[erts_active_code_ix()]); \ (p)->freason = TRAP; \ return THE_NON_VALUE; \ } while(0) @@ -195,7 +195,7 @@ do { \ (p)->arity = 2; \ reg[0] = (A0); \ reg[1] = (A1); \ - (p)->i = (BeamInstr*) ((Trap_)->address); \ + (p)->i = (BeamInstr*) ((Trap_)->addressv[erts_active_code_ix()]); \ (p)->freason = TRAP; \ return THE_NON_VALUE; \ } while(0) @@ -206,7 +206,7 @@ do { \ reg[0] = (A0); \ reg[1] = (A1); \ reg[2] = (A2); \ - (p)->i = (BeamInstr*) ((Trap_)->address); \ + (p)->i = (BeamInstr*) ((Trap_)->addressv[erts_active_code_ix()]); \ (p)->freason = TRAP; \ return THE_NON_VALUE; \ } while(0) diff --git a/erts/emulator/beam/bif.tab b/erts/emulator/beam/bif.tab index 797bce43ab..f7dad2767f 100644 --- a/erts/emulator/beam/bif.tab +++ b/erts/emulator/beam/bif.tab @@ -142,8 +142,6 @@ bif erlang:list_to_pid/1 bif 'erl.lang.proc':string_to_pid/1 ebif_string_to_pid_1 list_to_pid_1 bif erlang:list_to_tuple/1 bif 'erl.lang.tuple':from_list/1 ebif_list_to_tuple_1 -bif erlang:load_module/2 -bif 'erl.system.code':load/2 ebif_load_module_2 bif erlang:loaded/0 bif 'erl.system.code':loaded/0 ebif_loaded_0 bif erlang:localtime/0 @@ -829,6 +827,13 @@ bif erlang:dt_restore_tag/1 bif erlang:dt_prepend_vm_tag_data/1 bif erlang:dt_append_vm_tag_data/1 + +# +# New in R16B. +# +bif erlang:prepare_loading/2 +bif erlang:finish_loading/1 + # # Obsolete # diff --git a/erts/emulator/beam/break.c b/erts/emulator/beam/break.c index 6f5020dc14..0a51e00016 100644 --- a/erts/emulator/beam/break.c +++ b/erts/emulator/beam/break.c @@ -71,9 +71,10 @@ process_info(int to, void *to_arg) { int i; for (i = 0; i < erts_max_processes; i++) { - if ((process_tab[i] != NULL) && (process_tab[i]->i != ENULL)) { - if (process_tab[i]->status != P_EXITING) - print_process_info(to, to_arg, process_tab[i]); + Process *p = erts_pix2proc(i); + if (p && p->i != ENULL) { + if (!ERTS_PROC_IS_EXITING(p)) + print_process_info(to, to_arg, p); } } @@ -89,7 +90,8 @@ process_killer(void) erts_printf("\n\nProcess Information\n\n"); erts_printf("--------------------------------------------------\n"); for (i = erts_max_processes-1; i >= 0; i--) { - if (((rp = process_tab[i]) != NULL) && rp->i != ENULL) { + rp = erts_pix2proc(i); + if (rp && rp->i != ENULL) { int br; print_process_info(ERTS_PRINT_STDOUT, NULL, rp); erts_printf("(k)ill (n)ext (r)eturn:\n"); @@ -97,11 +99,20 @@ process_killer(void) if ((j = sys_get_key(0)) <= 0) erl_exit(0, ""); switch(j) { - case 'k': - if (rp->status == P_WAITING) { - ErtsProcLocks rp_locks = ERTS_PROC_LOCKS_XSIG_SEND; - erts_smp_proc_inc_refc(rp); - erts_smp_proc_lock(rp, rp_locks); + case 'k': { + ErtsProcLocks rp_locks = ERTS_PROC_LOCKS_XSIG_SEND; + erts_aint32_t state; + erts_smp_proc_inc_refc(rp); + erts_smp_proc_lock(rp, rp_locks); + state = erts_smp_atomic32_read_acqb(&rp->state); + if (state & (ERTS_PSFLG_FREE + | ERTS_PSFLG_EXITING + | ERTS_PSFLG_ACTIVE + | ERTS_PSFLG_IN_RUNQ + | ERTS_PSFLG_RUNNING)) { + erts_printf("Can only kill WAITING processes this way\n"); + } + else { (void) erts_send_exit_signal(NULL, NIL, rp, @@ -110,12 +121,10 @@ process_killer(void) NIL, NULL, 0); - erts_smp_proc_unlock(rp, rp_locks); - erts_smp_proc_dec_refc(rp); } - else - erts_printf("Can only kill WAITING processes this way\n"); - + erts_smp_proc_unlock(rp, rp_locks); + erts_smp_proc_dec_refc(rp); + } case 'n': br = 1; break; case 'r': return; default: return; @@ -180,42 +189,38 @@ static void doit_print_monitor(ErtsMonitor *mon, void *vpcontext) void print_process_info(int to, void *to_arg, Process *p) { + time_t approx_started; int garbing = 0; int running = 0; - time_t tmp_t; struct saved_calls *scb; + erts_aint32_t state; /* display the PID */ erts_print(to, to_arg, "=proc:%T\n", p->id); /* Display the state */ erts_print(to, to_arg, "State: "); - switch (p->status) { - case P_FREE: + + state = erts_smp_atomic32_read_acqb(&p->state); + if (state & ERTS_PSFLG_FREE) erts_print(to, to_arg, "Non Existing\n"); /* Should never happen */ - break; - case P_RUNABLE: - erts_print(to, to_arg, "Scheduled\n"); - break; - case P_WAITING: - erts_print(to, to_arg, "Waiting\n"); - break; - case P_SUSPENDED: - erts_print(to, to_arg, "Suspended\n"); - break; - case P_RUNNING: - erts_print(to, to_arg, "Running\n"); - running = 1; - break; - case P_EXITING: + else if (state & ERTS_PSFLG_EXITING) erts_print(to, to_arg, "Exiting\n"); - break; - case P_GARBING: - erts_print(to, to_arg, "Garbing\n"); + else if (state & ERTS_PSFLG_GC) { garbing = 1; running = 1; - break; + erts_print(to, to_arg, "Garbing\n"); + } + else if (state & ERTS_PSFLG_SUSPENDED) + erts_print(to, to_arg, "Suspended\n"); + else if (state & ERTS_PSFLG_RUNNING) { + running = 1; + erts_print(to, to_arg, "Running\n"); } + else if (state & ERTS_PSFLG_ACTIVE) + erts_print(to, to_arg, "Scheduled\n"); + else + erts_print(to, to_arg, "Waiting\n"); /* * If the process is registered as a global process, display the @@ -245,8 +250,8 @@ print_process_info(int to, void *to_arg, Process *p) } erts_print(to, to_arg, "Spawned by: %T\n", p->parent); - tmp_t = p->started.tv_sec; - erts_print(to, to_arg, "Started: %s", ctime(&tmp_t)); + approx_started = (time_t) p->approx_started; + erts_print(to, to_arg, "Started: %s", ctime(&approx_started)); ERTS_SMP_MSGQ_MV_INQ2PRIVQ(p); erts_print(to, to_arg, "Message queue length: %d\n", p->msg.len); @@ -377,17 +382,22 @@ loaded(int to, void *to_arg) int old = 0; int cur = 0; BeamInstr* code; + Module* modp; + ErtsCodeIndex code_ix; + + code_ix = erts_active_code_ix(); + erts_rlock_old_code(code_ix); /* * Calculate and print totals. */ - for (i = 0; i < module_code_size(); i++) { - if (module_code(i) != NULL && - ((module_code(i)->code_length != 0) || - (module_code(i)->old_code_length != 0))) { - cur += module_code(i)->code_length; - if (module_code(i)->old_code_length != 0) { - old += module_code(i)->old_code_length; + for (i = 0; i < module_code_size(code_ix); i++) { + if ((modp = module_code(i, code_ix)) != NULL && + ((modp->curr.code_length != 0) || + (modp->old.code_length != 0))) { + cur += modp->curr.code_length; + if (modp->old.code_length != 0) { + old += modp->old.code_length; } } } @@ -398,21 +408,22 @@ loaded(int to, void *to_arg) * Print one line per module. */ - for (i = 0; i < module_code_size(); i++) { + for (i = 0; i < module_code_size(code_ix); i++) { + modp = module_code(i, code_ix); if (!ERTS_IS_CRASH_DUMPING) { /* * Interactive dump; keep it brief. */ - if (module_code(i) != NULL && - ((module_code(i)->code_length != 0) || - (module_code(i)->old_code_length != 0))) { - erts_print(to, to_arg, "%T", make_atom(module_code(i)->module)); - cur += module_code(i)->code_length; - erts_print(to, to_arg, " %d", module_code(i)->code_length ); - if (module_code(i)->old_code_length != 0) { + if (modp != NULL && + ((modp->curr.code_length != 0) || + (modp->old.code_length != 0))) { + erts_print(to, to_arg, "%T", make_atom(modp->module)); + cur += modp->curr.code_length; + erts_print(to, to_arg, " %d", modp->curr.code_length ); + if (modp->old.code_length != 0) { erts_print(to, to_arg, " (%d old)", - module_code(i)->old_code_length ); - old += module_code(i)->old_code_length; + modp->old.code_length ); + old += modp->old.code_length; } erts_print(to, to_arg, "\n"); } @@ -420,15 +431,15 @@ loaded(int to, void *to_arg) /* * To crash dump; make it parseable. */ - if (module_code(i) != NULL && - ((module_code(i)->code_length != 0) || - (module_code(i)->old_code_length != 0))) { + if (modp != NULL && + ((modp->curr.code_length != 0) || + (modp->old.code_length != 0))) { erts_print(to, to_arg, "=mod:"); - erts_print(to, to_arg, "%T", make_atom(module_code(i)->module)); + erts_print(to, to_arg, "%T", make_atom(modp->module)); erts_print(to, to_arg, "\n"); erts_print(to, to_arg, "Current size: %d\n", - module_code(i)->code_length); - code = module_code(i)->code; + modp->curr.code_length); + code = modp->curr.code; if (code != NULL && code[MI_ATTR_PTR]) { erts_print(to, to_arg, "Current attributes: "); dump_attributes(to, to_arg, (byte *) code[MI_ATTR_PTR], @@ -440,9 +451,9 @@ loaded(int to, void *to_arg) code[MI_COMPILE_SIZE]); } - if (module_code(i)->old_code_length != 0) { - erts_print(to, to_arg, "Old size: %d\n", module_code(i)->old_code_length); - code = module_code(i)->old_code; + if (modp->old.code_length != 0) { + erts_print(to, to_arg, "Old size: %d\n", modp->old.code_length); + code = modp->old.code; if (code[MI_ATTR_PTR]) { erts_print(to, to_arg, "Old attributes: "); dump_attributes(to, to_arg, (byte *) code[MI_ATTR_PTR], @@ -457,6 +468,7 @@ loaded(int to, void *to_arg) } } } + erts_runlock_old_code(code_ix); } @@ -616,7 +628,8 @@ bin_check(void) int i, printed = 0; for (i=0; i < erts_max_processes; i++) { - if ((rp = process_tab[i]) == NULL) + rp = erts_pix2proc(i); + if (!rp) continue; for (hdr = rp->off_heap.first; hdr; hdr = hdr->next) { if (hdr->thing_word == HEADER_PROC_BIN) { @@ -704,7 +717,7 @@ erl_crash_dump_v(char *file, int line, char* fmt, va_list args) erts_print_nif_taints(fd, NULL); erts_fdprintf(fd, "Atoms: %d\n", atom_table_size()); info(fd, NULL); /* General system info */ - if (process_tab != NULL) /* XXX true at init */ + if (erts_proc.tab) process_info(fd, NULL); /* Info about each process and port */ db_info(fd, NULL, 0); erts_print_bif_timer_info(fd, NULL); diff --git a/erts/emulator/beam/code_ix.c b/erts/emulator/beam/code_ix.c new file mode 100644 index 0000000000..ae4cca1e58 --- /dev/null +++ b/erts/emulator/beam/code_ix.c @@ -0,0 +1,152 @@ +/* + * %CopyrightBegin% + * + * Copyright Ericsson AB 2012. All Rights Reserved. + * + * The contents of this file are subject to the Erlang Public License, + * Version 1.1, (the "License"); you may not use this file except in + * compliance with the License. You should have received a copy of the + * Erlang Public License along with this software. If not, it can be + * retrieved online at http://www.erlang.org/. + * + * Software distributed under the License is distributed on an "AS IS" + * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + * the License for the specific language governing rights and limitations + * under the License. + * + * %CopyrightEnd% + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include "code_ix.h" +#include "global.h" +#include "beam_catches.h" + + + +#if 0 +# define CIX_TRACE(text) erts_fprintf(stderr, "CIX_TRACE: " text " act=%u load=%u\r\n", erts_active_code_ix(), erts_staging_code_ix()) +#else +# define CIX_TRACE(text) +#endif + +erts_smp_atomic32_t the_active_code_index; +erts_smp_atomic32_t the_staging_code_index; + +static int the_code_ix_lock = 0; +struct code_ix_queue_item { + Process *p; + struct code_ix_queue_item* next; +}; +static struct code_ix_queue_item* the_code_ix_queue = NULL; +static erts_smp_mtx_t the_code_ix_queue_lock; + +void erts_code_ix_init(void) +{ + /* We start emulator by initializing preloaded modules + * single threaded with active and staging set both to zero. + * Preloading is finished by a commit that will set things straight. + */ + erts_smp_atomic32_init_nob(&the_active_code_index, 0); + erts_smp_atomic32_init_nob(&the_staging_code_index, 0); + erts_smp_mtx_init(&the_code_ix_queue_lock, "code_ix_queue"); + CIX_TRACE("init"); +} + +void erts_start_staging_code_ix(void) +{ + beam_catches_start_staging(); + export_start_staging(); + module_start_staging(); + erts_start_staging_ranges(); + CIX_TRACE("start"); +} + + +void erts_end_staging_code_ix(void) +{ + beam_catches_end_staging(1); + export_end_staging(1); + module_end_staging(1); + erts_end_staging_ranges(1); + CIX_TRACE("end"); +} + +void erts_commit_staging_code_ix(void) +{ + ErtsCodeIndex ix; + /* We need to this lock as we are now making the staging export table active */ + export_staging_lock(); + ix = erts_staging_code_ix(); + erts_smp_atomic32_set_nob(&the_active_code_index, ix); + ix = (ix + 1) % ERTS_NUM_CODE_IX; + erts_smp_atomic32_set_nob(&the_staging_code_index, ix); + export_staging_unlock(); + CIX_TRACE("activate"); +} + +void erts_abort_staging_code_ix(void) +{ + beam_catches_end_staging(0); + export_end_staging(0); + module_end_staging(0); + erts_end_staging_ranges(0); + CIX_TRACE("abort"); +} + + +/* + * Calller _must_ yield if we return 0 + */ +int erts_try_seize_code_write_permission(Process* c_p) +{ + int success; +#ifdef ERTS_SMP + ASSERT(!erts_smp_thr_progress_is_blocking()); /* to avoid deadlock */ +#endif + + erts_smp_mtx_lock(&the_code_ix_queue_lock); + success = !the_code_ix_lock; + if (success) { + the_code_ix_lock = 1; + } + else { /* Already locked */ + struct code_ix_queue_item* qitem; + qitem = erts_alloc(ERTS_ALC_T_CODE_IX_LOCK_Q, sizeof(*qitem)); + qitem->p = c_p; + erts_smp_proc_inc_refc(c_p); + qitem->next = the_code_ix_queue; + the_code_ix_queue = qitem; + erts_suspend(c_p, ERTS_PROC_LOCK_MAIN, NULL); + } + erts_smp_mtx_unlock(&the_code_ix_queue_lock); + return success; +} + +void erts_release_code_write_permission(void) +{ + erts_smp_mtx_lock(&the_code_ix_queue_lock); + while (the_code_ix_queue != NULL) { /* unleash the entire herd */ + struct code_ix_queue_item* qitem = the_code_ix_queue; + erts_smp_proc_lock(qitem->p, ERTS_PROC_LOCK_STATUS); + if (!ERTS_PROC_IS_EXITING(qitem->p)) { + erts_resume(qitem->p, ERTS_PROC_LOCK_STATUS); + } + erts_smp_proc_unlock(qitem->p, ERTS_PROC_LOCK_STATUS); + the_code_ix_queue = qitem->next; + erts_smp_proc_dec_refc(qitem->p); + erts_free(ERTS_ALC_T_CODE_IX_LOCK_Q, qitem); + } + the_code_ix_lock = 0; + erts_smp_mtx_unlock(&the_code_ix_queue_lock); +} + +#ifdef ERTS_ENABLE_LOCK_CHECK +int erts_is_code_ix_locked(void) +{ + return the_code_ix_lock; +} +#endif diff --git a/erts/emulator/beam/code_ix.h b/erts/emulator/beam/code_ix.h new file mode 100644 index 0000000000..6b2680044e --- /dev/null +++ b/erts/emulator/beam/code_ix.h @@ -0,0 +1,141 @@ +/* + * %CopyrightBegin% + * + * Copyright Ericsson AB 2012. All Rights Reserved. + * + * The contents of this file are subject to the Erlang Public License, + * Version 1.1, (the "License"); you may not use this file except in + * compliance with the License. You should have received a copy of the + * Erlang Public License along with this software. If not, it can be + * retrieved online at http://www.erlang.org/. + * + * Software distributed under the License is distributed on an "AS IS" + * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + * the License for the specific language governing rights and limitations + * under the License. + * + * %CopyrightEnd% + */ + +/* Description: + * This is the interface that facilitate changing the beam code + * (load,upgrade,delete) while allowing executing Erlang processes to + * access the code without any locks or other expensive memory barriers. + * + * The basic idea is to maintain several "logical copies" of the code. These + * copies are identified by a global 'code index', an integer of 0, 1 or 2. + * The code index is used as argument to code access structures like + * export, module, beam_catches, beam_ranges. + * + * The current 'active' code index is used to access the current running + * code. The 'staging' code index is used by the process that performs + * a code change operation. When a code change operation completes + * succesfully, the staging code index becomes the new active code index. + * + * The third code index is not explicitly used. It can be thought of as + * the "previous active" or the "next staging" index. It is needed to make + * sure that we do not reuse a code index for staging until we are sure + * that no executing BIFs are still referring it. + * We could get by with only two (0 and 1), but that would require that we + * must wait for all schedulers to re-schedule before each code change + * operation can start staging. + * + * Note that the 'code index' is very loosely coupled to the concept of + * 'current' and 'old' module versions. You can almost say that they are + * orthogonal to each other. Code index is an emulator global concept while + * 'current' and 'old' is specific for each module. + */ + +#ifndef __CODE_IX_H__ +#define __CODE_IX_H__ + +#ifndef __SYS_H__ +# ifdef HAVE_CONFIG_H +# include "config.h" +# endif +# include "sys.h" +#endif +struct process; + + +#define ERTS_NUM_CODE_IX 3 +typedef unsigned ErtsCodeIndex; + + +/* Called once at emulator initialization. + */ +void erts_code_ix_init(void); + +/* Return active code index. + * Is guaranteed to be valid until the calling BIF returns. + * To get a consistent view of the code, only one call to erts_active_code_ix() + * should be made and the returned ix reused within the same BIF call. + */ +ERTS_GLB_INLINE +ErtsCodeIndex erts_active_code_ix(void); + +/* Return staging code ix. + * Only used by a process performing code loading/upgrading/deleting/purging. + * code_ix must be locked. + */ +ERTS_GLB_INLINE +ErtsCodeIndex erts_staging_code_ix(void); + +/* Try seize exclusive code write permission. Needed for code staging. + * Main process lock (only) must be held. + * System thread progress must not be blocked. + * Caller is suspended and *must* yield if 0 is returned. + */ +int erts_try_seize_code_write_permission(struct process*); + +/* Release code write permission. + * Will resume any suspended waiters. + */ +void erts_release_code_write_permission(void); + +/* Prepare the "staging area" to be a complete copy of the active code. + * Code write permission must have been seized. + * Must be followed by calls to either "end" and "commit" or "abort" before + * code write permission can be released. + */ +void erts_start_staging_code_ix(void); + +/* End the staging. + * Preceded by "start" and must be followed by "commit". + */ +void erts_end_staging_code_ix(void); + +/* Set staging code index as new active code index. + * Preceded by "end". + */ +void erts_commit_staging_code_ix(void); + +/* Abort the staging. + * Preceded by "start". + */ +void erts_abort_staging_code_ix(void); + +#ifdef ERTS_ENABLE_LOCK_CHECK +int erts_is_code_ix_locked(void); +#endif + + + +#if ERTS_GLB_INLINE_INCL_FUNC_DEF + +extern erts_smp_atomic32_t the_active_code_index; +extern erts_smp_atomic32_t the_staging_code_index; + +ERTS_GLB_INLINE ErtsCodeIndex erts_active_code_ix(void) +{ + return erts_smp_atomic32_read_nob(&the_active_code_index); +} +ERTS_GLB_INLINE ErtsCodeIndex erts_staging_code_ix(void) +{ + return erts_smp_atomic32_read_nob(&the_staging_code_index); +} + +#endif /* ERTS_GLB_INLINE_INCL_FUNC_DEF */ + +#endif /* !__CODE_IX_H__ */ + diff --git a/erts/emulator/beam/dist.c b/erts/emulator/beam/dist.c index 01fd63d5d9..300c2b708f 100644 --- a/erts/emulator/beam/dist.c +++ b/erts/emulator/beam/dist.c @@ -1312,7 +1312,7 @@ int erts_net_message(Port *prt, if (is_not_pid(from) || is_not_atom(to)){ goto invalid_message; } - rp = erts_whereis_process(NULL, 0, to, 0, ERTS_P2P_FLG_SMP_INC_REFC); + rp = erts_whereis_process(NULL, 0, to, 0, 0); if (rp) { Uint xsize = (type == DOP_REG_SEND ? 0 @@ -1338,7 +1338,6 @@ int erts_net_message(Port *prt, erts_queue_dist_message(rp, &locks, ede_copy, token); if (locks) erts_smp_proc_unlock(rp, locks); - erts_smp_proc_dec_refc(rp); } break; @@ -1364,7 +1363,7 @@ int erts_net_message(Port *prt, if (is_not_pid(to)) { goto invalid_message; } - rp = erts_pid2proc_opt(NULL, 0, to, 0, ERTS_P2P_FLG_SMP_INC_REFC); + rp = erts_proc_lookup(to); if (rp) { Uint xsize = type == DOP_SEND ? 0 : ERTS_HEAP_FRAG_SIZE(token_size); ErtsProcLocks locks = 0; @@ -1388,7 +1387,6 @@ int erts_net_message(Port *prt, erts_queue_dist_message(rp, &locks, ede_copy, token); if (locks) erts_smp_proc_unlock(rp, locks); - erts_smp_proc_dec_refc(rp); } break; @@ -1544,8 +1542,7 @@ int erts_net_message(Port *prt, if (is_not_pid(from) || is_not_internal_pid(to)) { goto invalid_message; } - rp = erts_pid2proc_opt(NULL, 0, to, rp_locks, - ERTS_P2P_FLG_SMP_INC_REFC); + rp = erts_pid2proc(NULL, 0, to, rp_locks); if (rp) { (void) erts_send_exit_signal(NULL, from, @@ -1556,7 +1553,6 @@ int erts_net_message(Port *prt, NULL, 0); erts_smp_proc_unlock(rp, rp_locks); - erts_smp_proc_dec_refc(rp); } break; } @@ -2242,7 +2238,7 @@ static void doit_print_monitor_info(ErtsMonitor *mon, void *vptdp) void *arg = ((struct print_to_data *) vptdp)->arg; Process *rp; ErtsMonitor *rmon; - rp = erts_pid2proc_unlocked(mon->pid); + rp = erts_proc_lookup(mon->pid); if (!rp || (rmon = erts_lookup_monitor(rp->monitors, mon->ref)) == NULL) { erts_print(to, arg, "Warning, stray monitor for: %T\n", mon->pid); } else if (mon->type == MON_ORIGIN) { @@ -2281,7 +2277,7 @@ static void doit_print_link_info2(ErtsLink *lnk, void *vpplc) static void doit_print_link_info(ErtsLink *lnk, void *vptdp) { - if (is_internal_pid(lnk->pid) && erts_pid2proc_unlocked(lnk->pid)) { + if (is_internal_pid(lnk->pid) && erts_proc_lookup(lnk->pid)) { PrintLinkContext plc = {(struct print_to_data *) vptdp, lnk->pid}; erts_doforall_links(ERTS_LINK_ROOT(lnk), &doit_print_link_info2, &plc); } @@ -2303,7 +2299,7 @@ static void doit_print_nodelink_info(ErtsLink *lnk, void *vpcontext) { PrintNodeLinkContext *pcontext = vpcontext; - if (is_internal_pid(lnk->pid) && erts_pid2proc_unlocked(lnk->pid)) + if (is_internal_pid(lnk->pid) && erts_proc_lookup(lnk->pid)) erts_print(pcontext->ptd.to, pcontext->ptd.arg, "Remote monitoring: %T %T\n", lnk->pid, pcontext->sysname); } @@ -2451,15 +2447,15 @@ BIF_RETTYPE setnode_2(BIF_ALIST_2) goto error; /* Check that all trap functions are defined !! */ - if (dsend2_trap->address == NULL || - dsend3_trap->address == NULL || + if (dsend2_trap->addressv[0] == NULL || + dsend3_trap->addressv[0] == NULL || /* dsend_nosuspend_trap->address == NULL ||*/ - dlink_trap->address == NULL || - dunlink_trap->address == NULL || - dmonitor_node_trap->address == NULL || - dgroup_leader_trap->address == NULL || - dmonitor_p_trap->address == NULL || - dexit_trap->address == NULL) { + dlink_trap->addressv[0] == NULL || + dunlink_trap->addressv[0] == NULL || + dmonitor_node_trap->addressv[0] == NULL || + dgroup_leader_trap->addressv[0] == NULL || + dmonitor_p_trap->addressv[0] == NULL || + dexit_trap->addressv[0] == NULL) { goto error; } @@ -2706,9 +2702,8 @@ BIF_RETTYPE dist_exit_3(BIF_ALIST_3) } else { lp_locks = ERTS_PROC_LOCKS_XSIG_SEND; - lp = erts_pid2proc_opt(BIF_P, ERTS_PROC_LOCK_MAIN, - local, lp_locks, - ERTS_P2P_FLG_SMP_INC_REFC); + lp = erts_pid2proc(BIF_P, ERTS_PROC_LOCK_MAIN, + local, lp_locks); if (!lp) { BIF_RET(am_true); /* ignore */ } @@ -2727,9 +2722,7 @@ BIF_RETTYPE dist_exit_3(BIF_ALIST_3) lp_locks &= ~ERTS_PROC_LOCK_MAIN; #endif erts_smp_proc_unlock(lp, lp_locks); - if (lp != BIF_P) - erts_smp_proc_dec_refc(lp); - else { + if (lp == BIF_P) { /* * We may have exited current process and may have to take action. */ diff --git a/erts/emulator/beam/erl_alloc.c b/erts/emulator/beam/erl_alloc.c index 6fce032f9d..918a800555 100644 --- a/erts/emulator/beam/erl_alloc.c +++ b/erts/emulator/beam/erl_alloc.c @@ -2182,9 +2182,9 @@ erts_memory(int *print_to_p, void *print_to_arg, void *proc, Eterm earg) if (want.code) { size.code = module_table_sz(); size.code += export_table_sz(); - size.code += export_list_size() * sizeof(Export); + size.code += export_entries_sz(); size.code += erts_fun_table_sz(); - size.code += allocated_modules*sizeof(Range); + size.code += erts_ranges_sz(); size.code += erts_total_code_size; } @@ -2332,7 +2332,7 @@ erts_allocated_areas(int *print_to_p, void *print_to_arg, void *proc) values[i].arity = 2; values[i].name = "export_list"; - values[i].ui[0] = export_list_size() * sizeof(Export); + values[i].ui[0] = export_entries_sz(); i++; values[i].arity = 2; @@ -2347,7 +2347,7 @@ erts_allocated_areas(int *print_to_p, void *print_to_arg, void *proc) values[i].arity = 2; values[i].name = "module_refs"; - values[i].ui[0] = allocated_modules*sizeof(Range); + values[i].ui[0] = erts_ranges_sz(); i++; values[i].arity = 2; diff --git a/erts/emulator/beam/erl_alloc.types b/erts/emulator/beam/erl_alloc.types index d4ef9cc553..134de6dfa6 100644 --- a/erts/emulator/beam/erl_alloc.types +++ b/erts/emulator/beam/erl_alloc.types @@ -164,6 +164,7 @@ type MSG_REF FIXED_SIZE PROCESSES msg_ref type MSG_ROOTS TEMPORARY PROCESSES msg_roots type ROOTSET TEMPORARY PROCESSES root_set type LOADER_TMP TEMPORARY CODE loader_tmp +type PREPARED_CODE SHORT_LIVED CODE prepared_code type BIF_TIMER_TABLE LONG_LIVED SYSTEM bif_timer_table type SL_BIF_TIMER SHORT_LIVED PROCESSES bif_timer_sl type LL_BIF_TIMER STANDARD PROCESSES bif_timer_ll @@ -263,6 +264,8 @@ type ZLIB STANDARD SYSTEM zlib type CPU_GRPS_MAP LONG_LIVED SYSTEM cpu_groups_map type AUX_WORK_TMO LONG_LIVED SYSTEM aux_work_timeouts type MISC_AUX_WORK_Q LONG_LIVED SYSTEM misc_aux_work_q +type CODE_IX_LOCK_Q SHORT_LIVED SYSTEM code_ix_lock_q +type PROC_INTERVAL LONG_LIVED SYSTEM process_interval +if threads_no_smp # Need thread safe allocs, but std_alloc and fix_alloc are not; @@ -322,6 +325,8 @@ type SL_PTIMER SHORT_LIVED SYSTEM ptimer_sl type LL_PTIMER STANDARD SYSTEM ptimer_ll type SYS_MSG_Q SHORT_LIVED PROCESSES system_messages_queue type FP_EXCEPTION LONG_LIVED SYSTEM fp_exception +type LL_MPATHS LONG_LIVED SYSTEM ll_migration_paths +type SL_MPATHS SHORT_LIVED SYSTEM sl_migration_paths +endif +if hipe diff --git a/erts/emulator/beam/erl_alloc_util.c b/erts/emulator/beam/erl_alloc_util.c index e0d525bdde..62225d3572 100644 --- a/erts/emulator/beam/erl_alloc_util.c +++ b/erts/emulator/beam/erl_alloc_util.c @@ -832,14 +832,14 @@ init_dd_queue(ErtsAllctrDDQueue_t *ddq) static ERTS_INLINE erts_aint_t ddq_managed_thread_enqueue(ErtsAllctrDDQueue_t *ddq, void *ptr) { - erts_aint_t ilast, itmp; + erts_aint_t first_ilast, ilast, itmp; ErtsAllctrDDBlock_t *this = ptr; erts_atomic_init_nob(&this->atmc_next, ERTS_AINT_NULL); /* Enqueue at end of list... */ - ilast = erts_atomic_read_nob(&ddq->tail.data.last); + first_ilast = ilast = erts_atomic_read_nob(&ddq->tail.data.last); while (1) { ErtsAllctrDDBlock_t *last = (ErtsAllctrDDBlock_t *) ilast; itmp = erts_atomic_cmpxchg_mb(&last->atmc_next, @@ -853,8 +853,11 @@ ddq_managed_thread_enqueue(ErtsAllctrDDQueue_t *ddq, void *ptr) /* Move last pointer forward... */ while (1) { if (erts_atomic_read_rb(&this->atmc_next) != ERTS_AINT_NULL) { - /* Someone else will move it forward */ - return erts_atomic_read_rb(&ddq->tail.data.last); + ilast = erts_atomic_read_rb(&ddq->tail.data.last); + if (first_ilast != ilast) { + /* Someone else will move it forward */ + return ilast; + } } itmp = erts_atomic_cmpxchg_mb(&ddq->tail.data.last, (erts_aint_t) this, diff --git a/erts/emulator/beam/erl_bif_binary.c b/erts/emulator/beam/erl_bif_binary.c index cc4f2be8eb..474151d454 100644 --- a/erts/emulator/beam/erl_bif_binary.c +++ b/erts/emulator/beam/erl_bif_binary.c @@ -72,52 +72,29 @@ binary_matches(Process *p, Eterm arg1, Eterm arg2, Eterm arg3); void erts_init_bif_binary(void) { - sys_memset((void *) &binary_match_trap_export, 0, sizeof(Export)); - binary_match_trap_export.address = &binary_match_trap_export.code[3]; - binary_match_trap_export.code[0] = am_erlang; - binary_match_trap_export.code[1] = am_binary_match_trap; - binary_match_trap_export.code[2] = 3; - binary_match_trap_export.code[3] = (BeamInstr) em_apply_bif; - binary_match_trap_export.code[4] = (BeamInstr) &binary_match_trap; - - sys_memset((void *) &binary_matches_trap_export, 0, sizeof(Export)); - binary_matches_trap_export.address = &binary_matches_trap_export.code[3]; - binary_matches_trap_export.code[0] = am_erlang; - binary_matches_trap_export.code[1] = am_binary_matches_trap; - binary_matches_trap_export.code[2] = 3; - binary_matches_trap_export.code[3] = (BeamInstr) em_apply_bif; - binary_matches_trap_export.code[4] = (BeamInstr) &binary_matches_trap; - - sys_memset((void *) &binary_longest_prefix_trap_export, 0, sizeof(Export)); - binary_longest_prefix_trap_export.address = &binary_longest_prefix_trap_export.code[3]; - binary_longest_prefix_trap_export.code[0] = am_erlang; - binary_longest_prefix_trap_export.code[1] = am_binary_longest_prefix_trap; - binary_longest_prefix_trap_export.code[2] = 3; - binary_longest_prefix_trap_export.code[3] = (BeamInstr) em_apply_bif; - binary_longest_prefix_trap_export.code[4] = (BeamInstr) &binary_longest_prefix_trap; - - sys_memset((void *) &binary_longest_suffix_trap_export, 0, sizeof(Export)); - binary_longest_suffix_trap_export.address = &binary_longest_suffix_trap_export.code[3]; - binary_longest_suffix_trap_export.code[0] = am_erlang; - binary_longest_suffix_trap_export.code[1] = am_binary_longest_suffix_trap; - binary_longest_suffix_trap_export.code[2] = 3; - binary_longest_suffix_trap_export.code[3] = (BeamInstr) em_apply_bif; - binary_longest_suffix_trap_export.code[4] = (BeamInstr) &binary_longest_suffix_trap; - - sys_memset((void *) &binary_bin_to_list_trap_export, 0, sizeof(Export)); - binary_bin_to_list_trap_export.address = &binary_bin_to_list_trap_export.code[3]; - binary_bin_to_list_trap_export.code[0] = am_erlang; - binary_bin_to_list_trap_export.code[1] = am_binary_bin_to_list_trap; - binary_bin_to_list_trap_export.code[2] = 3; - binary_bin_to_list_trap_export.code[3] = (BeamInstr) em_apply_bif; - binary_bin_to_list_trap_export.code[4] = (BeamInstr) &binary_bin_to_list_trap; - sys_memset((void *) &binary_copy_trap_export, 0, sizeof(Export)); - binary_copy_trap_export.address = &binary_copy_trap_export.code[3]; - binary_copy_trap_export.code[0] = am_erlang; - binary_copy_trap_export.code[1] = am_binary_copy_trap; - binary_copy_trap_export.code[2] = 2; - binary_copy_trap_export.code[3] = (BeamInstr) em_apply_bif; - binary_copy_trap_export.code[4] = (BeamInstr) &binary_copy_trap; + erts_init_trap_export(&binary_match_trap_export, + am_erlang, am_binary_match_trap, 3, + &binary_match_trap); + + erts_init_trap_export(&binary_matches_trap_export, + am_erlang, am_binary_matches_trap, 3, + &binary_matches_trap); + + erts_init_trap_export(&binary_longest_prefix_trap_export, + am_erlang, am_binary_longest_prefix_trap, 3, + &binary_longest_prefix_trap); + + erts_init_trap_export(&binary_longest_suffix_trap_export, + am_erlang, am_binary_longest_suffix_trap, 3, + &binary_longest_suffix_trap); + + erts_init_trap_export(&binary_bin_to_list_trap_export, + am_erlang, am_binary_bin_to_list_trap, 3, + &binary_bin_to_list_trap); + + erts_init_trap_export(&binary_copy_trap_export, + am_erlang, am_binary_copy_trap, 2, + &binary_copy_trap); max_loop_limit = 0; return; diff --git a/erts/emulator/beam/erl_bif_chksum.c b/erts/emulator/beam/erl_bif_chksum.c index 06b7ffdf32..ff5ce3cc7a 100644 --- a/erts/emulator/beam/erl_bif_chksum.c +++ b/erts/emulator/beam/erl_bif_chksum.c @@ -42,16 +42,9 @@ static Export chksum_md5_2_exp; void erts_init_bif_chksum(void) { /* Non visual BIF to trap to. */ - memset(&chksum_md5_2_exp, 0, sizeof(Export)); - chksum_md5_2_exp.address = - &chksum_md5_2_exp.code[3]; - chksum_md5_2_exp.code[0] = am_erlang; - chksum_md5_2_exp.code[1] = am_atom_put("md5_trap",8); - chksum_md5_2_exp.code[2] = 2; - chksum_md5_2_exp.code[3] = - (BeamInstr) em_apply_bif; - chksum_md5_2_exp.code[4] = - (BeamInstr) &md5_2; + erts_init_trap_export(&chksum_md5_2_exp, + am_erlang, am_atom_put("md5_trap",8), 2, + &md5_2); } diff --git a/erts/emulator/beam/erl_bif_ddll.c b/erts/emulator/beam/erl_bif_ddll.c index c338ee1c4b..7f7c975e78 100644 --- a/erts/emulator/beam/erl_bif_ddll.c +++ b/erts/emulator/beam/erl_bif_ddll.c @@ -368,13 +368,11 @@ BIF_RETTYPE erl_ddll_try_load_3(BIF_ALIST_3) #endif for (j = 0; j < erts_max_ports; j++) { Port* prt = &erts_port[j]; -#ifdef DDLL_SMP erts_smp_port_state_lock(prt); -#endif if (!(prt->status & FREE_PORT_FLAGS) && prt->drv_ptr->handle == dh) { -#if DDLL_SMP erts_smp_atomic_inc_nob(&prt->refc); +#if DDLL_SMP /* Extremely rare spinlock */ while(prt->status & ERTS_PORT_SFLG_INITIALIZING) { erts_smp_port_state_unlock(prt); @@ -598,13 +596,11 @@ done: #endif for (j = 0; j < erts_max_ports; j++) { Port* prt = &erts_port[j]; -#if DDLL_SMP erts_smp_port_state_lock(prt); -#endif if (!(prt->status & FREE_PORT_FLAGS) && prt->drv_ptr->handle == dh) { -#if DDLL_SMP erts_smp_atomic_inc_nob(&prt->refc); +#if DDLL_SMP /* Extremely rare spinlock */ while(prt->status & ERTS_PORT_SFLG_INITIALIZING) { erts_smp_port_state_unlock(prt); @@ -1060,13 +1056,11 @@ void erts_ddll_proc_dead(Process *p, ErtsProcLocks plocks) #endif for (j = 0; j < erts_max_ports; j++) { Port* prt = &erts_port[j]; -#if DDLL_SMP erts_smp_port_state_lock(prt); -#endif if (!(prt->status & FREE_PORT_FLAGS) && prt->drv_ptr->handle == dh) { -#if DDLL_SMP erts_smp_atomic_inc_nob(&prt->refc); +#if DDLL_SMP while(prt->status & ERTS_PORT_SFLG_INITIALIZING) { erts_smp_port_state_unlock(prt); erts_smp_port_state_lock(prt); diff --git a/erts/emulator/beam/erl_bif_info.c b/erts/emulator/beam/erl_bif_info.c index f56b00287f..e2f7c8673f 100755 --- a/erts/emulator/beam/erl_bif_info.c +++ b/erts/emulator/beam/erl_bif_info.c @@ -1338,13 +1338,15 @@ process_info_aux(Process *BIF_P, hp = HAlloc(BIF_P, 3); break; - case am_trap_exit: + case am_trap_exit: { + erts_aint32_t state = erts_smp_atomic32_read_nob(&rp->state); hp = HAlloc(BIF_P, 3); - if (rp->flags & F_TRAPEXIT) + if (state & ERTS_PSFLG_TRAP_EXIT) res = am_true; else res = am_false; break; + } case am_error_handler: hp = HAlloc(BIF_P, 3); @@ -3098,15 +3100,13 @@ BIF_RETTYPE is_process_alive_1(BIF_ALIST_1) if(internal_pid_index(BIF_ARG_1) >= erts_max_processes) BIF_ERROR(BIF_P, BADARG); - rp = erts_pid2proc(BIF_P, ERTS_PROC_LOCK_MAIN, - BIF_ARG_1, ERTS_PROC_LOCK_STATUS); + rp = erts_proc_lookup(BIF_ARG_1); if (!rp) { BIF_RET(am_false); } else { - int have_pending_exit = ERTS_PROC_PENDING_EXIT(rp); - erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_STATUS); - if (have_pending_exit) + if (erts_smp_atomic32_read_acqb(&rp->state) + & (ERTS_PSFLG_PENDING_EXIT|ERTS_PSFLG_EXITING)) ERTS_BIF_AWAIT_X_DATA_TRAP(BIF_P, BIF_ARG_1, am_false); else BIF_RET(am_true); @@ -3710,9 +3710,8 @@ BIF_RETTYPE erts_debug_set_internal_state_2(BIF_ALIST_2) && is_internal_pid(tp[2])) { int xres; ErtsProcLocks rp_locks = ERTS_PROC_LOCKS_XSIG_SEND; - Process *rp = erts_pid2proc_opt(BIF_P, ERTS_PROC_LOCK_MAIN, - tp[2], rp_locks, - ERTS_P2P_FLG_SMP_INC_REFC); + Process *rp = erts_pid2proc(BIF_P, ERTS_PROC_LOCK_MAIN, + tp[2], rp_locks); if (!rp) { DECL_AM(dead); BIF_RET(AM_dead); @@ -3738,7 +3737,6 @@ BIF_RETTYPE erts_debug_set_internal_state_2(BIF_ALIST_2) rp_locks &= ~ERTS_PROC_LOCK_MAIN; #endif erts_smp_proc_unlock(rp, rp_locks); - erts_smp_proc_dec_refc(rp); if (xres > 1) { DECL_AM(message); BIF_RET(AM_message); @@ -3949,7 +3947,7 @@ static Eterm lcnt_build_lock_term(Eterm **hpp, Uint *szp, erts_lcnt_lock_t *lock id = am_atom_put(ltype, strlen(ltype)); } else if (lock->flag & ERTS_LCNT_LT_PROCLOCK) { /* use registered names as id's for process locks if available */ - proc = erts_pid2proc_unlocked(lock->id); + proc = erts_proc_lookup(lock->id); if (proc && proc->reg) { id = proc->reg->name; } else { diff --git a/erts/emulator/beam/erl_bif_re.c b/erts/emulator/beam/erl_bif_re.c index 6b843d2e08..b036c5ef5c 100644 --- a/erts/emulator/beam/erl_bif_re.c +++ b/erts/emulator/beam/erl_bif_re.c @@ -71,14 +71,9 @@ void erts_init_bif_re(void) erts_pcre_stack_free = &erts_erts_pcre_stack_free; default_table = NULL; /* ISO8859-1 default, forced into pcre */ max_loop_limit = CONTEXT_REDS * LOOP_FACTOR; - - sys_memset((void *) &re_exec_trap_export, 0, sizeof(Export)); - re_exec_trap_export.address = &re_exec_trap_export.code[3]; - re_exec_trap_export.code[0] = am_erlang; - re_exec_trap_export.code[1] = am_re_run_trap; - re_exec_trap_export.code[2] = 3; - re_exec_trap_export.code[3] = (BeamInstr) em_apply_bif; - re_exec_trap_export.code[4] = (BeamInstr) &re_exec_trap; + + erts_init_trap_export(&re_exec_trap_export, am_erlang, am_re_run_trap, 3, + &re_exec_trap); grun_trap_exportp = erts_export_put(am_re,am_grun,3); urun_trap_exportp = erts_export_put(am_re,am_urun,3); diff --git a/erts/emulator/beam/erl_bif_timer.c b/erts/emulator/beam/erl_bif_timer.c index d806be0704..525b11f61c 100644 --- a/erts/emulator/beam/erl_bif_timer.c +++ b/erts/emulator/beam/erl_bif_timer.c @@ -324,10 +324,9 @@ bif_timer_timeout(ErtsBifTimer* btm) ASSERT(!erts_get_current_process()); if (btm->flags & BTM_FLG_BYNAME) - rp = erts_whereis_process(NULL,0,btm->receiver.name,0,ERTS_P2P_FLG_SMP_INC_REFC); + rp = erts_whereis_process(NULL, 0, btm->receiver.name, 0, 0); else { rp = btm->receiver.proc.ess; - erts_smp_proc_inc_refc(rp); unlink_proc(btm); } @@ -379,7 +378,6 @@ bif_timer_timeout(ErtsBifTimer* btm) #endif ); erts_smp_proc_unlock(rp, rp_locks); - erts_smp_proc_dec_refc(rp); } } diff --git a/erts/emulator/beam/erl_bif_trace.c b/erts/emulator/beam/erl_bif_trace.c index 80f774523c..7f1b02b9b4 100644 --- a/erts/emulator/beam/erl_bif_trace.c +++ b/erts/emulator/beam/erl_bif_trace.c @@ -60,8 +60,8 @@ static Eterm trace_info_pid(Process* p, Eterm pid_spec, Eterm key); static Eterm trace_info_func(Process* p, Eterm pid_spec, Eterm key); static Eterm trace_info_on_load(Process* p, Eterm key); -static int setup_func_trace(Export* ep, void* match_prog); -static int reset_func_trace(Export* ep); +static int setup_func_trace(Export* ep, void* match_prog, ErtsCodeIndex); +static int reset_func_trace(Export* ep, ErtsCodeIndex); static void reset_bif_trace(int bif_index); static void setup_bif_trace(int bif_index); static void set_trace_bif(int bif_index, void* match_prog); @@ -98,7 +98,7 @@ trace_pattern(Process* p, Eterm MFA, Eterm Pattern, Eterm flaglist) { DeclareTmpHeap(mfa,3,p); /* Not really heap here, but might be when setting pattern */ int i; - int matches = 0; + int matches = -1; int specified = 0; enum erts_break_op on; Binary* match_prog_set; @@ -108,6 +108,9 @@ trace_pattern(Process* p, Eterm MFA, Eterm Pattern, Eterm flaglist) Process *meta_tracer_proc = p; Eterm meta_tracer_pid = p->id; + if (!erts_try_seize_code_write_permission(p)) { + ERTS_BIF_YIELD3(bif_export[BIF_trace_pattern_3], p, MFA, Pattern, flaglist); + } erts_smp_proc_unlock(p, ERTS_PROC_LOCK_MAIN); erts_smp_thr_progress_block(); @@ -241,7 +244,6 @@ trace_pattern(Process* p, Eterm MFA, Eterm Pattern, Eterm flaglist) erts_default_meta_match_spec = NULL; erts_default_meta_tracer_pid = NIL; } - MatchSetUnref(match_prog_set); if (erts_default_trace_pattern_flags.breakpoint && flags.breakpoint) { /* Breakpoint trace -> breakpoint trace */ @@ -297,8 +299,7 @@ trace_pattern(Process* p, Eterm MFA, Eterm Pattern, Eterm flaglist) erts_default_trace_pattern_is_on = !!flags.breakpoint; } } - - goto done; + matches = 0; } else if (is_tuple(MFA)) { Eterm *tp = tuple_val(MFA); if (tp[0] != make_arityval(3)) { @@ -322,35 +323,29 @@ trace_pattern(Process* p, Eterm MFA, Eterm Pattern, Eterm flaglist) if (is_small(mfa[2])) { mfa[2] = signed_val(mfa[2]); } - } else { - goto error; - } - if (meta_tracer_proc) { - meta_tracer_proc->trace_flags |= F_TRACER; - } - - - matches = erts_set_trace_pattern(mfa, specified, - match_prog_set, match_prog_set, - on, flags, meta_tracer_pid); - MatchSetUnref(match_prog_set); - - done: - UnUseTmpHeap(3,p); - erts_smp_thr_progress_unblock(); - erts_smp_proc_lock(p, ERTS_PROC_LOCK_MAIN); + if (meta_tracer_proc) { + meta_tracer_proc->trace_flags |= F_TRACER; + } - return make_small(matches); + matches = erts_set_trace_pattern(mfa, specified, + match_prog_set, match_prog_set, + on, flags, meta_tracer_pid); + } error: - MatchSetUnref(match_prog_set); - UnUseTmpHeap(3,p); erts_smp_thr_progress_unblock(); erts_smp_proc_lock(p, ERTS_PROC_LOCK_MAIN); - BIF_ERROR(p, BADARG); + erts_release_code_write_permission(); + + if (matches >= 0) { + return make_small(matches); + } + else { + BIF_ERROR(p, BADARG); + } } void @@ -372,7 +367,10 @@ erts_get_default_trace_pattern(int *trace_pattern_is_on, *meta_tracer_pid = erts_default_meta_tracer_pid; } - +int erts_is_default_trace_enabled(void) +{ + return erts_default_trace_pattern_is_on; +} Uint erts_trace_flag2bit(Eterm flag) @@ -466,6 +464,10 @@ Eterm trace_3(BIF_ALIST_3) BIF_ERROR(p, BADARG); } + if (!erts_try_seize_code_write_permission(BIF_P)) { + ERTS_BIF_YIELD3(bif_export[BIF_trace_3], BIF_P, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3); + } + if (is_nil(tracer) || is_internal_pid(tracer)) { Process *tracer_proc = erts_pid2proc(p, ERTS_PROC_LOCK_MAIN, @@ -653,8 +655,7 @@ Eterm trace_3(BIF_ALIST_3) if (procs || mods) { /* tracing of processes */ for (i = 0; i < erts_max_processes; i++) { - Process* tracee_p = process_tab[i]; - + Process* tracee_p = erts_pix2proc(i); if (! tracee_p) continue; if (tracer != NIL) { @@ -730,6 +731,7 @@ Eterm trace_3(BIF_ALIST_3) erts_smp_proc_lock(p, ERTS_PROC_LOCK_MAIN); } #endif + erts_release_code_write_permission(); BIF_RET(make_small(matches)); @@ -745,6 +747,7 @@ Eterm trace_3(BIF_ALIST_3) erts_smp_proc_lock(p, ERTS_PROC_LOCK_MAIN); } #endif + erts_release_code_write_permission(); BIF_ERROR(p, BADARG); } @@ -772,8 +775,7 @@ static int port_already_traced(Process *c_p, Port *tracee_port, Eterm tracer) return 1; } else if(is_internal_pid(tracee_port->tracer_proc)) { - Process *tracer_p = erts_pid2proc(c_p, ERTS_PROC_LOCK_MAIN, - tracee_port->tracer_proc, 0); + Process *tracer_p = erts_proc_lookup(tracee_port->tracer_proc); if (!tracer_p) { /* Current trace process now invalid * - discard it and approve the new. */ @@ -813,8 +815,7 @@ static int already_traced(Process *c_p, Process *tracee_p, Eterm tracer) return 1; } else if(is_internal_pid(tracee_p->tracer_proc)) { - Process *tracer_p = erts_pid2proc(c_p, ERTS_PROC_LOCK_MAIN, - tracee_p->tracer_proc, 0); + Process *tracer_p = erts_proc_lookup(tracee_p->tracer_proc); if (!tracer_p) { /* Current trace process now invalid * - discard it and approve the new. */ @@ -876,7 +877,7 @@ trace_info_pid(Process* p, Eterm pid_spec, Eterm key) } if (is_internal_pid(tracer)) { - if (!erts_pid2proc(p, ERTS_PROC_LOCK_MAIN, tracer, 0)) { + if (!erts_proc_lookup(tracer)) { reset_tracer: tracee->trace_flags &= ~TRACEE_FLAGS; trace_flags = tracee->trace_flags; @@ -990,7 +991,7 @@ static int function_is_traced(Process *p, e.code[1] = mfa[1]; e.code[2] = mfa[2]; if ((ep = export_get(&e)) != NULL) { - if (ep->address == ep->code+3 && + if (ep->addressv[erts_active_code_ix()] == ep->code+3 && ep->code[3] != (BeamInstr) em_call_error_handler) { if (ep->code[3] == (BeamInstr) em_call_traced_function) { *ms = ep->match_prog_set; @@ -1333,6 +1334,7 @@ erts_set_trace_pattern(Eterm* mfa, int specified, int on, struct trace_pattern_flags flags, Eterm meta_tracer_pid) { + const ErtsCodeIndex code_ix = erts_active_code_ix(); int matches = 0; int i; @@ -1340,8 +1342,8 @@ erts_set_trace_pattern(Eterm* mfa, int specified, * First work on normal functions (not real BIFs). */ - for (i = 0; i < export_list_size(); i++) { - Export* ep = export_list(i); + for (i = 0; i < export_list_size(code_ix); i++) { + Export* ep = export_list(i, code_ix); int j; if (ExportIsBuiltIn(ep)) { @@ -1355,11 +1357,11 @@ erts_set_trace_pattern(Eterm* mfa, int specified, if (j == specified) { if (on) { if (! flags.breakpoint) - matches += setup_func_trace(ep, match_prog_set); + matches += setup_func_trace(ep, match_prog_set, code_ix); else - reset_func_trace(ep); + reset_func_trace(ep, code_ix); } else if (! flags.breakpoint) { - matches += reset_func_trace(ep); + matches += reset_func_trace(ep, code_ix); } } } @@ -1522,9 +1524,11 @@ erts_set_trace_pattern(Eterm* mfa, int specified, */ static int -setup_func_trace(Export* ep, void* match_prog) +setup_func_trace(Export* ep, void* match_prog, ErtsCodeIndex code_ix) { - if (ep->address == ep->code+3) { + Module* modp; + + if (ep->addressv[code_ix] == ep->code+3) { if (ep->code[3] == (BeamInstr) em_call_error_handler) { return 0; } else if (ep->code[3] == (BeamInstr) em_call_traced_function) { @@ -1543,15 +1547,19 @@ setup_func_trace(Export* ep, void* match_prog) /* * Currently no trace support for native code. */ - if (erts_is_native_break(ep->address)) { + if (erts_is_native_break(ep->addressv[code_ix])) { return 0; } - + ep->code[3] = (BeamInstr) em_call_traced_function; - ep->code[4] = (BeamInstr) ep->address; - ep->address = ep->code+3; + ep->code[4] = (BeamInstr) ep->addressv[code_ix]; + ep->addressv[code_ix] = ep->code+3; ep->match_prog_set = match_prog; MatchSetRef(ep->match_prog_set); + + modp = erts_get_module(ep->code[0], code_ix); + ASSERT(modp); + modp->curr.num_traced_exports++; return 1; } @@ -1584,13 +1592,17 @@ static void set_trace_bif(int bif_index, void* match_prog) { */ static int -reset_func_trace(Export* ep) +reset_func_trace(Export* ep, ErtsCodeIndex code_ix) { - if (ep->address == ep->code+3) { + if (ep->addressv[code_ix] == ep->code+3) { if (ep->code[3] == (BeamInstr) em_call_error_handler) { return 0; } else if (ep->code[3] == (BeamInstr) em_call_traced_function) { - ep->address = (Uint *) ep->code[4]; + Module* modp = erts_get_module(ep->code[0], code_ix); + ASSERT(modp); + modp->curr.num_traced_exports--; + + ep->addressv[code_ix] = (Uint *) ep->code[4]; MatchSetUnref(ep->match_prog_set); ep->match_prog_set = NULL; return 1; @@ -1605,7 +1617,7 @@ reset_func_trace(Export* ep) /* * Currently no trace support for native code. */ - if (erts_is_native_break(ep->address)) { + if (erts_is_native_break(ep->addressv[code_ix])) { return 0; } @@ -2142,9 +2154,9 @@ BIF_RETTYPE system_profile_2(BIF_ALIST_2) /* Check if valid process, no locks are taken */ if (is_internal_pid(profiler)) { - if (internal_pid_index(profiler) >= erts_max_processes) goto error; - profiler_p = process_tab[internal_pid_index(profiler)]; - if (INVALID_PID(profiler_p, profiler)) goto error; + profiler_p = erts_proc_lookup(profiler); + if (!profiler_p) + goto error; } else if (is_internal_port(profiler)) { if (internal_port_index(profiler) >= erts_max_ports) goto error; profiler_port = &erts_port[internal_port_index(profiler)]; diff --git a/erts/emulator/beam/erl_cpu_topology.c b/erts/emulator/beam/erl_cpu_topology.c index fe3693d0ca..41e71881a0 100644 --- a/erts/emulator/beam/erl_cpu_topology.c +++ b/erts/emulator/beam/erl_cpu_topology.c @@ -486,7 +486,7 @@ erts_sched_check_cpu_bind_post_suspend(ErtsSchedulerData *esdp) erts_thr_set_main_status(1, (int) esdp->no); /* Make sure we check if we should bind to a cpu or not... */ - esdp->run_queue->flags |= ERTS_RUNQ_FLG_CHK_CPU_BIND; + ERTS_RUNQ_FLGS_SET(esdp->run_queue, ERTS_RUNQ_FLG_CHK_CPU_BIND); } #endif @@ -498,9 +498,6 @@ erts_sched_check_cpu_bind(ErtsSchedulerData *esdp) erts_cpu_groups_map_t *cgm; erts_cpu_groups_callback_list_t *cgcl; erts_cpu_groups_callback_call_t *cgcc; -#ifdef ERTS_SMP - esdp->run_queue->flags &= ~ERTS_RUNQ_FLG_CHK_CPU_BIND; -#endif erts_smp_runq_unlock(esdp->run_queue); erts_smp_rwmtx_rwlock(&cpuinfo_rwmtx); cpu_id = scheduler2cpu_map[esdp->no].bind_id; diff --git a/erts/emulator/beam/erl_db.c b/erts/emulator/beam/erl_db.c index 51bdf53823..5bd8163968 100644 --- a/erts/emulator/beam/erl_db.c +++ b/erts/emulator/beam/erl_db.c @@ -2816,7 +2816,6 @@ void init_db(void) { DbTable init_tb; int i; - extern BeamInstr* em_apply_bif; Eterm *hp; unsigned bits; size_t size; @@ -2850,7 +2849,7 @@ void init_db(void) else db_max_tabs = user_requested_db_max_tabs; - bits = erts_fit_in_bits(db_max_tabs-1); + bits = erts_fit_in_bits_int32(db_max_tabs-1); if (bits > SMALL_BITS) { erl_exit(1,"Max limit for ets tabled too high %u (max %u).", db_max_tabs, ((Uint)1)<<SMALL_BITS); @@ -2949,49 +2948,24 @@ void init_db(void) } /* Non visual BIF to trap to. */ - memset(&ets_select_delete_continue_exp, 0, sizeof(Export)); - ets_select_delete_continue_exp.address = - &ets_select_delete_continue_exp.code[3]; - ets_select_delete_continue_exp.code[0] = am_ets; - ets_select_delete_continue_exp.code[1] = am_atom_put("delete_trap",11); - ets_select_delete_continue_exp.code[2] = 1; - ets_select_delete_continue_exp.code[3] = - (BeamInstr) em_apply_bif; - ets_select_delete_continue_exp.code[4] = - (BeamInstr) &ets_select_delete_1; + erts_init_trap_export(&ets_select_delete_continue_exp, + am_ets, am_atom_put("delete_trap",11), 1, + &ets_select_delete_1); /* Non visual BIF to trap to. */ - memset(&ets_select_count_continue_exp, 0, sizeof(Export)); - ets_select_count_continue_exp.address = - &ets_select_count_continue_exp.code[3]; - ets_select_count_continue_exp.code[0] = am_ets; - ets_select_count_continue_exp.code[1] = am_atom_put("count_trap",11); - ets_select_count_continue_exp.code[2] = 1; - ets_select_count_continue_exp.code[3] = - (BeamInstr) em_apply_bif; - ets_select_count_continue_exp.code[4] = - (BeamInstr) &ets_select_count_1; + erts_init_trap_export(&ets_select_count_continue_exp, + am_ets, am_atom_put("count_trap",11), 1, + &ets_select_count_1); /* Non visual BIF to trap to. */ - memset(&ets_select_continue_exp, 0, sizeof(Export)); - ets_select_continue_exp.address = - &ets_select_continue_exp.code[3]; - ets_select_continue_exp.code[0] = am_ets; - ets_select_continue_exp.code[1] = am_atom_put("select_trap",11); - ets_select_continue_exp.code[2] = 1; - ets_select_continue_exp.code[3] = - (BeamInstr) em_apply_bif; - ets_select_continue_exp.code[4] = - (BeamInstr) &ets_select_trap_1; + erts_init_trap_export(&ets_select_continue_exp, + am_ets, am_atom_put("select_trap",11), 1, + &ets_select_trap_1); /* Non visual BIF to trap to. */ - memset(&ets_delete_continue_exp, 0, sizeof(Export)); - ets_delete_continue_exp.address = &ets_delete_continue_exp.code[3]; - ets_delete_continue_exp.code[0] = am_ets; - ets_delete_continue_exp.code[1] = am_atom_put("delete_trap",11); - ets_delete_continue_exp.code[2] = 1; - ets_delete_continue_exp.code[3] = (BeamInstr) em_apply_bif; - ets_delete_continue_exp.code[4] = (BeamInstr) &ets_delete_trap; + erts_init_trap_export(&ets_delete_continue_exp, + am_ets, am_atom_put("delete_trap",11), 1, + &ets_delete_trap); hp = ms_delete_all_buff; ms_delete_all = CONS(hp, am_true, NIL); @@ -3124,7 +3098,7 @@ retry: if (to_proc == NULL) { return 0; /* heir not alive, table still mine */ } - if (erts_cmp_timeval(&to_proc->started, &tb->common.heir_started) != 0) { + if (to_proc->started_interval != tb->common.heir_started_interval) { erts_smp_proc_unlock(to_proc, to_locks); return 0; /* heir dead and pid reused, table still mine */ } @@ -3520,14 +3494,14 @@ static void set_heir(Process* me, DbTable* tb, Eterm heir, UWord heir_data) return; } if (heir == me->id) { - tb->common.heir_started = me->started; + erts_ensure_later_proc_interval(me->started_interval); + tb->common.heir_started_interval = me->started_interval; } else { - Process* heir_proc= erts_pid2proc_opt(me, ERTS_PROC_LOCK_MAIN, heir, - 0, ERTS_P2P_FLG_SMP_INC_REFC); + Process* heir_proc= erts_proc_lookup(heir); if (heir_proc != NULL) { - tb->common.heir_started = heir_proc->started; - erts_smp_proc_dec_refc(heir_proc); + erts_ensure_later_proc_interval(heir_proc->started_interval); + tb->common.heir_started_interval = heir_proc->started_interval; } else { tb->common.heir = am_none; } diff --git a/erts/emulator/beam/erl_db_tree.c b/erts/emulator/beam/erl_db_tree.c index 312050b931..faa7f31d99 100644 --- a/erts/emulator/beam/erl_db_tree.c +++ b/erts/emulator/beam/erl_db_tree.c @@ -452,16 +452,8 @@ DbTableMethod db_tree = void db_initialize_tree(void) { - memset(&ets_select_reverse_exp, 0, sizeof(Export)); - ets_select_reverse_exp.address = - &ets_select_reverse_exp.code[3]; - ets_select_reverse_exp.code[0] = am_ets; - ets_select_reverse_exp.code[1] = am_reverse; - ets_select_reverse_exp.code[2] = 3; - ets_select_reverse_exp.code[3] = - (BeamInstr) em_apply_bif; - ets_select_reverse_exp.code[4] = - (BeamInstr) &ets_select_reverse; + erts_init_trap_export(&ets_select_reverse_exp, am_ets, am_reverse, 3, + &ets_select_reverse); return; }; diff --git a/erts/emulator/beam/erl_db_util.h b/erts/emulator/beam/erl_db_util.h index 6a96e174e1..ff5982640d 100644 --- a/erts/emulator/beam/erl_db_util.h +++ b/erts/emulator/beam/erl_db_util.h @@ -219,7 +219,7 @@ typedef struct db_table_common { Eterm owner; /* Pid of the creator */ Eterm heir; /* Pid of the heir */ UWord heir_data; /* To send in ETS-TRANSFER (is_immed or (DbTerm*) */ - SysTimeval heir_started; /* To further identify the heir */ + Uint64 heir_started_interval; /* To further identify the heir */ Eterm the_name; /* an atom */ Eterm id; /* atom | integer */ DbTableMethod* meth; /* table methods */ diff --git a/erts/emulator/beam/erl_fun.h b/erts/emulator/beam/erl_fun.h index 54cfd6aa83..217066ab11 100644 --- a/erts/emulator/beam/erl_fun.h +++ b/erts/emulator/beam/erl_fun.h @@ -77,8 +77,6 @@ ErlFunEntry* erts_get_fun_entry(Eterm mod, int uniq, int index); ErlFunEntry* erts_put_fun_entry2(Eterm mod, int old_uniq, int old_index, byte* uniq, int index, int arity); -ErlFunEntry* erts_get_fun_entry2(Eterm mod, int old_uniq, int old_index, - byte* uniq, int index, int arity); void erts_erase_fun_entry(ErlFunEntry* fe); void erts_cleanup_funs(ErlFunThing* funp); diff --git a/erts/emulator/beam/erl_gc.c b/erts/emulator/beam/erl_gc.c index 52a6e52e6c..6075a527c3 100644 --- a/erts/emulator/beam/erl_gc.c +++ b/erts/emulator/beam/erl_gc.c @@ -357,11 +357,7 @@ erts_garbage_collect(Process* p, int need, Eterm* objv, int nobj) trace_gc(p, am_gc_start); } - erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); - p->gcstatus = p->status; - p->status = P_GARBING; - erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); - + erts_smp_atomic32_read_bor_nob(&p->state, ERTS_PSFLG_GC); if (erts_system_monitor_long_gc != 0) { get_now(&ms1, &s1, &us1); } @@ -404,9 +400,8 @@ erts_garbage_collect(Process* p, int need, Eterm* objv, int nobj) ErtsGcQuickSanityCheck(p); - erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); - p->status = p->gcstatus; - erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + erts_smp_atomic32_read_band_nob(&p->state, ~ERTS_PSFLG_GC); + if (IS_TRACED_FL(p, F_TRACE_GC)) { trace_gc(p, am_gc_end); } @@ -490,10 +485,7 @@ erts_garbage_collect_hibernate(Process* p) /* * Preliminaries. */ - erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); - p->gcstatus = p->status; - p->status = P_GARBING; - erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + erts_smp_atomic32_read_bor_nob(&p->state, ERTS_PSFLG_GC); ErtsGcQuickSanityCheck(p); ASSERT(p->mbuf_sz == 0); ASSERT(p->mbuf == 0); @@ -604,9 +596,7 @@ erts_garbage_collect_hibernate(Process* p) ErtsGcQuickSanityCheck(p); - erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); - p->status = p->gcstatus; - erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + erts_smp_atomic32_read_band_nob(&p->state, ~ERTS_PSFLG_GC); } @@ -630,10 +620,7 @@ erts_garbage_collect_literals(Process* p, Eterm* literals, /* * Set GC state. */ - erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); - p->gcstatus = p->status; - p->status = P_GARBING; - erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + erts_smp_atomic32_read_bor_nob(&p->state, ERTS_PSFLG_GC); /* * We assume that the caller has already done a major collection @@ -775,9 +762,7 @@ erts_garbage_collect_literals(Process* p, Eterm* literals, /* * Restore status. */ - erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); - p->status = p->gcstatus; - erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + erts_smp_atomic32_read_band_nob(&p->state, ~ERTS_PSFLG_GC); } static int diff --git a/erts/emulator/beam/erl_init.c b/erts/emulator/beam/erl_init.c index 02164728fe..d382e421e6 100644 --- a/erts/emulator/beam/erl_init.c +++ b/erts/emulator/beam/erl_init.c @@ -55,6 +55,61 @@ #endif /* + * The variables below (prefixed with etp_) are for erts/etc/unix/etp-commands + * only. Do not remove even though they aren't used elsewhere in the emulator! + */ +#ifdef ERTS_SMP +const int etp_smp_compiled = 1; +#else +const int etp_smp_compiled = 0; +#endif +#ifdef USE_THREADS +const int etp_thread_compiled = 1; +#else +const int etp_thread_compiled = 0; +#endif +const char etp_erts_version[] = ERLANG_VERSION; +const char etp_otp_release[] = ERLANG_OTP_RELEASE; +const char etp_compile_date[] = ERLANG_COMPILE_DATE; +const char etp_arch[] = ERLANG_ARCHITECTURE; +#ifdef ERTS_ENABLE_KERNEL_POLL +const int etp_kernel_poll_support = 1; +#else +const int etp_kernel_poll_support = 0; +#endif +#if defined(ARCH_64) +const int etp_arch_bits = 64; +#elif defined(ARCH_32) +const int etp_arch_bits = 32; +#else +# error "Not 64-bit, nor 32-bit arch" +#endif +#if HALFWORD_HEAP +const int etp_halfword = 1; +#else +const int etp_halfword = 0; +#endif +#ifdef HIPE +const int etp_hipe = 1; +#else +const int etp_hipe = 0; +#endif +#ifdef DEBUG +const int etp_debug_compiled = 1; +#else +const int etp_debug_compiled = 0; +#endif +#ifdef ERTS_ENABLE_LOCK_COUNT +const int etp_lock_count = 1; +#else +const int etp_lock_count = 0; +#endif +#ifdef ERTS_ENABLE_LOCK_CHECK +const int etp_lock_check = 1; +#else +const int etp_lock_check = 0; +#endif +/* * Note about VxWorks: All variables must be initialized by executable code, * not by an initializer. Otherwise a new instance of the emulator will * inherit previous values. @@ -241,6 +296,7 @@ erl_init(int ncpu) erts_init_trace(); erts_init_binary(); erts_init_bits(); + erts_code_ix_init(); erts_init_fun_table(); init_atom_table(); init_export_table(); @@ -289,7 +345,8 @@ erl_first_process_otp(char* modname, void* code, unsigned size, int argc, char** Eterm env; start_mod = am_atom_put(modname, sys_strlen(modname)); - if (erts_find_function(start_mod, am_start, 2) == NULL) { + if (erts_find_function(start_mod, am_start, 2, + erts_active_code_ix()) == NULL) { erl_exit(5, "No function %s:start/2\n", modname); } @@ -388,7 +445,7 @@ load_preloaded(void) if ((code = sys_preload_begin(&preload_p[i])) == 0) erl_exit(1, "Failed to find preloaded code for module %s\n", name); - res = erts_load_module(NULL, 0, NIL, &module_name, code, length); + res = erts_preload_module(NULL, 0, NIL, &module_name, code, length); sys_preload_end(&preload_p[i]); if (res != NIL) erl_exit(1,"Failed loading preloaded module %s (%T)\n", @@ -555,6 +612,7 @@ early_init(int *argc, char **argv) /* erts_printf_eterm_func = erts_printf_term; erts_disable_tolerant_timeofday = 0; display_items = 200; + erts_proc.max = ERTS_DEFAULT_MAX_PROCESSES; erts_backtrace_depth = DEFAULT_BACKTRACE_SIZE; erts_async_max_threads = 0; erts_async_thread_suggested_stack_size = ERTS_ASYNC_THREAD_MIN_STACK_SIZE; @@ -1097,7 +1155,7 @@ erl_start(int argc, char **argv) case 'P': /* set maximum number of processes */ Parg = get_arg(argv[i]+2, argv[i+1], &i); - erts_max_processes = atoi(Parg); + erts_proc.max = atoi(Parg); /* Check of result is delayed until later. This is because +R may be given after +P. */ break; @@ -1396,10 +1454,10 @@ erl_start(int argc, char **argv) } /* Delayed check of +P flag */ - if (erts_max_processes < ERTS_MIN_PROCESSES - || erts_max_processes > ERTS_MAX_PROCESSES + if (erts_proc.max < ERTS_MIN_PROCESSES + || erts_proc.max > ERTS_MAX_PROCESSES || (erts_use_r9_pids_ports - && erts_max_processes > ERTS_MAX_R9_PROCESSES)) { + && erts_proc.max > ERTS_MAX_R9_PROCESSES)) { erts_fprintf(stderr, "bad number of processes %s\n", Parg); erts_usage(); } @@ -1427,6 +1485,8 @@ erl_start(int argc, char **argv) erl_init(ncpu); load_preloaded(); + erts_end_staging_code_ix(); + erts_commit_staging_code_ix(); erts_initialized = 1; diff --git a/erts/emulator/beam/erl_lock_check.c b/erts/emulator/beam/erl_lock_check.c index a0f744be9d..95efd9efc3 100644 --- a/erts/emulator/beam/erl_lock_check.c +++ b/erts/emulator/beam/erl_lock_check.c @@ -82,8 +82,8 @@ static erts_lc_lock_order_t erts_lock_order[] = { #ifdef ERTS_SMP { "bif_timers", NULL }, { "reg_tab", NULL }, - { "migration_info_update", NULL }, { "proc_main", "pid" }, + { "old_code", "address" }, #ifdef HIPE { "hipe_mfait_lock", NULL }, #endif @@ -93,6 +93,7 @@ static erts_lc_lock_order_t erts_lock_order[] = { { "proc_msgq", "pid" }, { "dist_entry", "address" }, { "dist_entry_links", "address" }, + { "code_ix_queue", NULL }, { "proc_status", "pid" }, { "proc_tab", NULL }, { "ports_snapshot", NULL }, @@ -124,6 +125,7 @@ static erts_lc_lock_order_t erts_lock_order[] = { { "removed_fd_pre_alloc_lock", "address" }, { "state_prealloc", NULL }, { "schdlr_sspnd", NULL }, + { "migration_info_update", NULL }, { "run_queue", "address" }, { "cpu_info", NULL }, { "pollset", "address" }, @@ -446,7 +448,7 @@ print_lock2(char *prefix, Sint16 id, Wterm extra, Uint16 flags, char *suffix) "%s'%s:%p%s'%s%s", prefix, lname, - boxed_val(extra), + _unchecked_boxed_val(extra), lock_type(flags), rw_op_str(flags), suffix); diff --git a/erts/emulator/beam/erl_message.c b/erts/emulator/beam/erl_message.c index 499a2aac53..241d61b868 100644 --- a/erts/emulator/beam/erl_message.c +++ b/erts/emulator/beam/erl_message.c @@ -296,36 +296,6 @@ erts_msg_distext2heap(Process *pp, return THE_NON_VALUE; } -static ERTS_INLINE void -notify_new_message(Process *receiver) -{ - ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS - & erts_proc_lc_my_proc_locks(receiver)); - - switch (receiver->status) { - case P_GARBING: - switch (receiver->gcstatus) { - case P_SUSPENDED: - goto suspended; - case P_WAITING: - goto waiting; - default: - break; - } - break; - case P_SUSPENDED: - suspended: - receiver->rstatus = P_RUNABLE; - break; - case P_WAITING: - waiting: - erts_add_to_runq(receiver); - break; - default: - break; - } -} - void erts_queue_dist_message(Process *rcvr, ErtsProcLocks *rcvr_locks, @@ -339,7 +309,7 @@ erts_queue_dist_message(Process *rcvr, Sint tok_serial = 0; #endif #ifdef ERTS_SMP - ErtsProcLocks need_locks; + erts_aint_t state; #endif ERTS_SMP_LC_ASSERT(*rcvr_locks == erts_proc_lc_my_proc_locks(rcvr)); @@ -347,20 +317,21 @@ erts_queue_dist_message(Process *rcvr, mp = message_alloc(); #ifdef ERTS_SMP - need_locks = ~(*rcvr_locks) & (ERTS_PROC_LOCK_MSGQ|ERTS_PROC_LOCK_STATUS); - if (need_locks) { - *rcvr_locks |= need_locks; - if (erts_smp_proc_trylock(rcvr, need_locks) == EBUSY) { - if (need_locks == ERTS_PROC_LOCK_MSGQ) { + if (!(*rcvr_locks & ERTS_PROC_LOCK_MSGQ)) { + if (erts_smp_proc_trylock(rcvr, ERTS_PROC_LOCK_MSGQ) == EBUSY) { + ErtsProcLocks need_locks = ERTS_PROC_LOCK_MSGQ; + if (*rcvr_locks & ERTS_PROC_LOCK_STATUS) { erts_smp_proc_unlock(rcvr, ERTS_PROC_LOCK_STATUS); - need_locks = (ERTS_PROC_LOCK_MSGQ - | ERTS_PROC_LOCK_STATUS); + need_locks |= ERTS_PROC_LOCK_STATUS; } erts_smp_proc_lock(rcvr, need_locks); } } - if (rcvr->is_exiting || ERTS_PROC_PENDING_EXIT(rcvr)) { + state = erts_smp_atomic32_read_acqb(&rcvr->state); + if (state & (ERTS_PSFLG_PENDING_EXIT|ERTS_PSFLG_EXITING)) { + if (!(*rcvr_locks & ERTS_PROC_LOCK_MSGQ)) + erts_smp_proc_unlock(rcvr, ERTS_PROC_LOCK_MSGQ); /* Drop message if receiver is exiting or has a pending exit ... */ if (is_not_nil(token)) { ErlHeapFragment *heap_frag; @@ -376,6 +347,8 @@ erts_queue_dist_message(Process *rcvr, /* Ahh... need to decode it in order to trace it... */ ErlHeapFragment *mbuf; Eterm msg; + if (!(*rcvr_locks & ERTS_PROC_LOCK_MSGQ)) + erts_smp_proc_unlock(rcvr, ERTS_PROC_LOCK_MSGQ); message_free(mp); msg = erts_msg_distext2heap(rcvr, rcvr_locks, &mbuf, &token, dist_ext); if (is_value(msg)) @@ -437,26 +410,32 @@ erts_queue_dist_message(Process *rcvr, mp->data.dist_ext = dist_ext; LINK_MESSAGE(rcvr, mp); - notify_new_message(rcvr); + if (!(*rcvr_locks & ERTS_PROC_LOCK_MSGQ)) + erts_smp_proc_unlock(rcvr, ERTS_PROC_LOCK_MSGQ); + + erts_proc_notify_new_message(rcvr); } } /* Add a message last in message queue */ -void -erts_queue_message(Process* receiver, - ErtsProcLocks *receiver_locks, - ErlHeapFragment* bp, - Eterm message, - Eterm seq_trace_token +static int +queue_message(Process *c_p, + Process* receiver, + ErtsProcLocks *receiver_locks, + erts_aint32_t *receiver_state, + ErlHeapFragment* bp, + Eterm message, + Eterm seq_trace_token #ifdef USE_VM_PROBES , Eterm dt_utag #endif -) + ) { ErlMessage* mp; -#ifdef ERTS_SMP - ErtsProcLocks need_locks; -#else + int locked_msgq = 0; + erts_aint_t state; + +#ifndef ERTS_SMP ASSERT(bp != NULL || receiver->mbuf == NULL); #endif @@ -464,31 +443,45 @@ erts_queue_message(Process* receiver, mp = message_alloc(); + if (receiver_state) + state = *receiver_state; + else + state = erts_smp_atomic32_read_acqb(&receiver->state); + #ifdef ERTS_SMP - need_locks = ~(*receiver_locks) & (ERTS_PROC_LOCK_MSGQ - | ERTS_PROC_LOCK_STATUS); - if (need_locks) { - *receiver_locks |= need_locks; - if (erts_smp_proc_trylock(receiver, need_locks) == EBUSY) { - if (need_locks == ERTS_PROC_LOCK_MSGQ) { + + if (state & (ERTS_PSFLG_EXITING|ERTS_PSFLG_PENDING_EXIT)) + goto exiting; + + if (!(*receiver_locks & ERTS_PROC_LOCK_MSGQ)) { + if (erts_smp_proc_trylock(receiver, ERTS_PROC_LOCK_MSGQ) == EBUSY) { + ErtsProcLocks need_locks = ERTS_PROC_LOCK_MSGQ; + if (*receiver_locks & ERTS_PROC_LOCK_STATUS) { erts_smp_proc_unlock(receiver, ERTS_PROC_LOCK_STATUS); - need_locks = (ERTS_PROC_LOCK_MSGQ - | ERTS_PROC_LOCK_STATUS); + need_locks |= ERTS_PROC_LOCK_STATUS; } erts_smp_proc_lock(receiver, need_locks); } + locked_msgq = 1; + state = erts_smp_atomic32_read_nob(&receiver->state); + if (receiver_state) + *receiver_state = state; } - if (receiver->is_exiting || ERTS_PROC_PENDING_EXIT(receiver)) { - /* Drop message if receiver is exiting or has a pending - * exit ... - */ +#endif + + if (state & (ERTS_PSFLG_PENDING_EXIT|ERTS_PSFLG_EXITING)) { +#ifdef ERTS_SMP + exiting: +#endif + /* Drop message if receiver is exiting or has a pending exit... */ + if (locked_msgq) + erts_smp_proc_unlock(receiver, ERTS_PROC_LOCK_MSGQ); if (bp) free_message_buffer(bp); message_free(mp); - return; + return 0; } -#endif ERL_MESSAGE_TERM(mp) = message; ERL_MESSAGE_TOKEN(mp) = seq_trace_token; @@ -511,12 +504,11 @@ erts_queue_message(Process* receiver, ERTS_SMP_MSGQ_MV_INQ2PRIVQ(receiver); LINK_MESSAGE_PRIVQ(receiver, mp); } - else { + else +#endif + { LINK_MESSAGE(receiver, mp); } -#else - LINK_MESSAGE(receiver, mp); -#endif #ifdef USE_VM_PROBES if (DTRACE_ENABLED(message_queued)) { @@ -536,15 +528,43 @@ erts_queue_message(Process* receiver, tok_label, tok_lastcnt, tok_serial); } #endif - notify_new_message(receiver); - if (IS_TRACED_FL(receiver, F_TRACE_RECEIVE)) { + if (IS_TRACED_FL(receiver, F_TRACE_RECEIVE)) trace_receive(receiver, message); - } + + if (locked_msgq) + erts_smp_proc_unlock(receiver, ERTS_PROC_LOCK_MSGQ); + + erts_proc_notify_new_message(receiver); #ifndef ERTS_SMP ERTS_HOLE_CHECK(receiver); #endif + return 0; +} + +void +erts_queue_message(Process* receiver, + ErtsProcLocks *receiver_locks, + ErlHeapFragment* bp, + Eterm message, + Eterm seq_trace_token +#ifdef USE_VM_PROBES + , Eterm dt_utag +#endif + ) +{ + queue_message(NULL, + receiver, + receiver_locks, + NULL, + bp, + message, + seq_trace_token +#ifdef USE_VM_PROBES + , dt_utag +#endif + ); } void @@ -1036,21 +1056,34 @@ erts_send_message(Process* sender, #ifdef ERTS_SMP ErlOffHeap *ohp; Eterm *hp; + erts_aint32_t state; + BM_SWAP_TIMER(send,size); msize = size_object(message); BM_SWAP_TIMER(size,send); - hp = erts_alloc_message_heap(msize,&bp,&ohp,receiver,receiver_locks); + hp = erts_alloc_message_heap_state(msize, + &bp, + &ohp, + receiver, + receiver_locks, + &state); BM_SWAP_TIMER(send,copy); message = copy_struct(message, msize, &hp, ohp); BM_MESSAGE_COPIED(msz); BM_SWAP_TIMER(copy,send); DTRACE6(message_send, sender_name, receiver_name, msize, tok_label, tok_lastcnt, tok_serial); - erts_queue_message(receiver, receiver_locks, bp, message, token + queue_message(sender, + receiver, + receiver_locks, + &state, + bp, + message, + token #ifdef USE_VM_PROBES - , NIL + , NIL #endif - ); + ); BM_SWAP_TIMER(send,system); #else ErlMessage* mp = message_alloc(); @@ -1081,11 +1114,8 @@ erts_send_message(Process* sender, mp->data.attached = NULL; LINK_MESSAGE(receiver, mp); - if (receiver->status == P_WAITING) { - erts_add_to_runq(receiver); - } else if (receiver->status == P_SUSPENDED) { - receiver->rstatus = P_RUNABLE; - } + erts_proc_notify_new_message(receiver); + if (IS_TRACED_FL(receiver, F_TRACE_RECEIVE)) { trace_receive(receiver, message); } diff --git a/erts/emulator/beam/erl_nif.c b/erts/emulator/beam/erl_nif.c index b323bc7f69..da4376fd0a 100644 --- a/erts/emulator/beam/erl_nif.c +++ b/erts/emulator/beam/erl_nif.c @@ -311,6 +311,7 @@ int enif_send(ErlNifEnv* env, const ErlNifPid* to_pid, #endif Eterm receiver = to_pid->pid; int flush_me = 0; + int scheduler = erts_get_scheduler_id() != 0; if (env != NULL) { c_p = env->proc; @@ -330,8 +331,11 @@ int enif_send(ErlNifEnv* env, const ErlNifPid* to_pid, #if defined(ERTS_ENABLE_LOCK_CHECK) && defined(ERTS_SMP) rp_had_locks = rp_locks; #endif - rp = erts_pid2proc_opt(c_p, ERTS_PROC_LOCK_MAIN, - receiver, rp_locks, ERTS_P2P_FLG_SMP_INC_REFC); + + rp = (scheduler + ? erts_proc_lookup(receiver) + : erts_pid2proc_opt(c_p, ERTS_PROC_LOCK_MAIN, + receiver, rp_locks, ERTS_P2P_FLG_SMP_INC_REFC)); if (rp == NULL) { ASSERT(env == NULL || receiver != c_p->id); return 0; @@ -358,12 +362,12 @@ int enif_send(ErlNifEnv* env, const ErlNifPid* to_pid, , NIL #endif ); - if (rp_locks) { - ERTS_SMP_LC_ASSERT(rp_locks == (rp_had_locks | (ERTS_PROC_LOCK_MSGQ | - ERTS_PROC_LOCK_STATUS))); - erts_smp_proc_unlock(rp, (ERTS_PROC_LOCK_MSGQ | ERTS_PROC_LOCK_STATUS)); - } - erts_smp_proc_dec_refc(rp); + if (c_p == rp) + rp_locks &= ~ERTS_PROC_LOCK_MAIN; + if (rp_locks) + erts_smp_proc_unlock(rp, rp_locks); + if (!scheduler) + erts_smp_proc_dec_refc(rp); if (flush_me) { cache_env(env); } @@ -1520,6 +1524,7 @@ BIF_RETTYPE load_nif_2(BIF_ALIST_2) if (len < 0) { BIF_ERROR(BIF_P, BADARG); } + lib_name = (char *) erts_alloc(ERTS_ALC_T_TMP, len + 1); if (intlist_to_buf(BIF_ARG_1, lib_name, len) != len) { @@ -1528,6 +1533,12 @@ BIF_RETTYPE load_nif_2(BIF_ALIST_2) } lib_name[len] = '\0'; + if (!erts_try_seize_code_write_permission(BIF_P)) { + erts_free(ERTS_ALC_T_TMP, lib_name); + ERTS_BIF_YIELD2(bif_export[BIF_load_nif_2], + BIF_P, BIF_ARG_1, BIF_ARG_2); + } + /* Block system (is this the right place to do it?) */ erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN); erts_smp_thr_progress_block(); @@ -1541,11 +1552,11 @@ BIF_RETTYPE load_nif_2(BIF_ALIST_2) ASSERT(caller != NULL); mod_atom = caller[0]; ASSERT(is_atom(mod_atom)); - mod=erts_get_module(mod_atom); + mod=erts_get_module(mod_atom, erts_active_code_ix()); ASSERT(mod != NULL); - if (!in_area(caller, mod->code, mod->code_length)) { - ASSERT(in_area(caller, mod->old_code, mod->old_code_length)); + if (!in_area(caller, mod->curr.code, mod->curr.code_length)) { + ASSERT(in_area(caller, mod->old.code, mod->old.code_length)); ret = load_nif_error(BIF_P, "old_code", "Calling load_nif from old " "module '%T' not allowed", mod_atom); @@ -1591,7 +1602,7 @@ BIF_RETTYPE load_nif_2(BIF_ALIST_2) BeamInstr** code_pp; ErlNifFunc* f = &entry->funcs[i]; if (!erts_atom_get(f->name, sys_strlen(f->name), &f_atom) - || (code_pp = get_func_pp(mod->code, f_atom, f->arity))==NULL) { + || (code_pp = get_func_pp(mod->curr.code, f_atom, f->arity))==NULL) { ret = load_nif_error(BIF_P,bad_lib,"Function not found %T:%s/%u", mod_atom, f->name, f->arity); } @@ -1620,18 +1631,18 @@ BIF_RETTYPE load_nif_2(BIF_ALIST_2) erts_refc_init(&lib->rt_dtor_cnt, 0); lib->mod = mod; env.mod_nif = lib; - if (mod->nif != NULL) { /* Reload */ + if (mod->curr.nif != NULL) { /* Reload */ int k; - lib->priv_data = mod->nif->priv_data; + lib->priv_data = mod->curr.nif->priv_data; - ASSERT(mod->nif->entry != NULL); + ASSERT(mod->curr.nif->entry != NULL); if (entry->reload == NULL) { ret = load_nif_error(BIF_P,reload,"Reload not supported by this NIF library."); goto error; } /* Check that no NIF is removed */ - for (k=0; k < mod->nif->entry->num_of_funcs; k++) { - ErlNifFunc* old_func = &mod->nif->entry->funcs[k]; + for (k=0; k < mod->curr.nif->entry->num_of_funcs; k++) { + ErlNifFunc* old_func = &mod->curr.nif->entry->funcs[k]; for (i=0; i < entry->num_of_funcs; i++) { if (old_func->arity == entry->funcs[i].arity && sys_strcmp(old_func->name, entry->funcs[i].name) == 0) { @@ -1652,24 +1663,24 @@ BIF_RETTYPE load_nif_2(BIF_ALIST_2) ret = load_nif_error(BIF_P, reload, "Library reload-call unsuccessful."); } else { - mod->nif->entry = NULL; /* to prevent 'unload' callback */ - erts_unload_nif(mod->nif); + mod->curr.nif->entry = NULL; /* to prevent 'unload' callback */ + erts_unload_nif(mod->curr.nif); reload_warning = 1; } } else { lib->priv_data = NULL; - if (mod->old_nif != NULL) { /* Upgrade */ - void* prev_old_data = mod->old_nif->priv_data; + if (mod->old.nif != NULL) { /* Upgrade */ + void* prev_old_data = mod->old.nif->priv_data; if (entry->upgrade == NULL) { ret = load_nif_error(BIF_P, upgrade, "Upgrade not supported by this NIF library."); goto error; } erts_pre_nif(&env, BIF_P, lib); - veto = entry->upgrade(&env, &lib->priv_data, &mod->old_nif->priv_data, BIF_ARG_2); + veto = entry->upgrade(&env, &lib->priv_data, &mod->old.nif->priv_data, BIF_ARG_2); erts_post_nif(&env); if (veto) { - mod->old_nif->priv_data = prev_old_data; + mod->old.nif->priv_data = prev_old_data; ret = load_nif_error(BIF_P, upgrade, "Library upgrade-call unsuccessful."); } /*else if (mod->old_nif->priv_data != prev_old_data) { @@ -1689,12 +1700,12 @@ BIF_RETTYPE load_nif_2(BIF_ALIST_2) /* ** Everything ok, patch the beam code with op_call_nif */ - mod->nif = lib; + mod->curr.nif = lib; for (i=0; i < entry->num_of_funcs; i++) { BeamInstr* code_ptr; erts_atom_get(entry->funcs[i].name, sys_strlen(entry->funcs[i].name), &f_atom); - code_ptr = *get_func_pp(mod->code, f_atom, entry->funcs[i].arity); + code_ptr = *get_func_pp(mod->curr.code, f_atom, entry->funcs[i].arity); if (code_ptr[1] == 0) { code_ptr[5+0] = (BeamInstr) BeamOp(op_call_nif); @@ -1722,6 +1733,7 @@ BIF_RETTYPE load_nif_2(BIF_ALIST_2) erts_smp_thr_progress_unblock(); erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN); + erts_release_code_write_permission(); erts_free(ERTS_ALC_T_TMP, lib_name); if (reload_warning) { diff --git a/erts/emulator/beam/erl_node_container_utils.h b/erts/emulator/beam/erl_node_container_utils.h index 329a2204cc..7b4cb7b042 100644 --- a/erts/emulator/beam/erl_node_container_utils.h +++ b/erts/emulator/beam/erl_node_container_utils.h @@ -128,8 +128,47 @@ extern int erts_use_r9_pids_ports; * Pids * \* */ -#define internal_pid_index(x) (internal_pid_data((x)) \ - & erts_process_tab_index_mask) +#define erts_max_processes erts_proc.max + +typedef struct { + erts_smp_atomic_t *tab; + int max; + int tab_cache_lines; + int pix_per_cache_line; + int pix_cl_mask; + int pix_cl_shift; + int pix_cli_mask; + int pix_cli_shift; +} ErtsProcTab; + +extern ErtsProcTab erts_proc; + +ERTS_GLB_INLINE int erts_pid_data2ix(Eterm pid_data); + +#if ERTS_GLB_INLINE_INCL_FUNC_DEF + +ERTS_GLB_INLINE int erts_pid_data2ix(Eterm pid_data) +{ + int n, pix; + + n = (int) pid_data; + if (erts_proc.pix_cl_mask) { + pix = ((n & erts_proc.pix_cl_mask) << erts_proc.pix_cl_shift); + pix += ((n >> erts_proc.pix_cli_shift) & erts_proc.pix_cli_mask); + } + else { + n %= erts_proc.max; + pix = n % erts_proc.tab_cache_lines; + pix *= erts_proc.pix_per_cache_line; + pix += n / erts_proc.tab_cache_lines; + } + ASSERT(0 <= pix && pix < erts_proc.max); + return pix; +} + +#endif + +#define internal_pid_index(x) erts_pid_data2ix(internal_pid_data((x))) #define internal_pid_node_name(x) (internal_pid_node((x))->sysname) #define external_pid_node_name(x) (external_pid_node((x))->sysname) diff --git a/erts/emulator/beam/erl_node_tables.c b/erts/emulator/beam/erl_node_tables.c index c7fd379367..649be3f454 100644 --- a/erts/emulator/beam/erl_node_tables.c +++ b/erts/emulator/beam/erl_node_tables.c @@ -1298,21 +1298,22 @@ setup_reference_table(void) UnUseTmpHeapNoproc(3); /* Insert all processes */ - for (i = 0; i < erts_max_processes; i++) - if (process_tab[i]) { + for (i = 0; i < erts_max_processes; i++) { + Process *proc = erts_pix2proc(i); + if (proc) { ErlMessage *msg; /* Insert Heap */ - insert_offheap(&(process_tab[i]->off_heap), + insert_offheap(&(proc->off_heap), HEAP_REF, - process_tab[i]->id); + proc->id); /* Insert message buffers */ - for(hfp = process_tab[i]->mbuf; hfp; hfp = hfp->next) + for(hfp = proc->mbuf; hfp; hfp = hfp->next) insert_offheap(&(hfp->off_heap), HEAP_REF, - process_tab[i]->id); + proc->id); /* Insert msg msg buffers */ - for (msg = process_tab[i]->msg.first; msg; msg = msg->next) { + for (msg = proc->msg.first; msg; msg = msg->next) { ErlHeapFragment *heap_frag = NULL; if (msg->data.attached) { if (is_value(ERL_MESSAGE_TERM(msg))) @@ -1320,7 +1321,7 @@ setup_reference_table(void) else { if (msg->data.dist_ext->dep) insert_dist_entry(msg->data.dist_ext->dep, - HEAP_REF, process_tab[i]->id, 0); + HEAP_REF, proc->id, 0); if (is_not_nil(ERL_MESSAGE_TOKEN(msg))) heap_frag = erts_dist_ext_trailer(msg->data.dist_ext); } @@ -1328,10 +1329,10 @@ setup_reference_table(void) if (heap_frag) insert_offheap(&(heap_frag->off_heap), HEAP_REF, - process_tab[i]->id); + proc->id); } #ifdef ERTS_SMP - for (msg = process_tab[i]->msg_inq.first; msg; msg = msg->next) { + for (msg = proc->msg_inq.first; msg; msg = msg->next) { ErlHeapFragment *heap_frag = NULL; if (msg->data.attached) { if (is_value(ERL_MESSAGE_TERM(msg))) @@ -1339,7 +1340,7 @@ setup_reference_table(void) else { if (msg->data.dist_ext->dep) insert_dist_entry(msg->data.dist_ext->dep, - HEAP_REF, process_tab[i]->id, 0); + HEAP_REF, proc->id, 0); if (is_not_nil(ERL_MESSAGE_TOKEN(msg))) heap_frag = erts_dist_ext_trailer(msg->data.dist_ext); } @@ -1347,21 +1348,22 @@ setup_reference_table(void) if (heap_frag) insert_offheap(&(heap_frag->off_heap), HEAP_REF, - process_tab[i]->id); + proc->id); } #endif /* Insert links */ - if(process_tab[i]->nlinks) - insert_links(process_tab[i]->nlinks, process_tab[i]->id); - if(process_tab[i]->monitors) - insert_monitors(process_tab[i]->monitors, process_tab[i]->id); + if(proc->nlinks) + insert_links(proc->nlinks, proc->id); + if(proc->monitors) + insert_monitors(proc->monitors, proc->id); /* Insert controller */ { - DistEntry *dep = ERTS_PROC_GET_DIST_ENTRY(process_tab[i]); + DistEntry *dep = ERTS_PROC_GET_DIST_ENTRY(proc); if (dep) - insert_dist_entry(dep, CTRL_REF, process_tab[i]->id, 0); + insert_dist_entry(dep, CTRL_REF, proc->id, 0); } } + } #ifdef ERTS_SMP erts_foreach_sys_msg_in_q(insert_sys_msg); diff --git a/erts/emulator/beam/erl_port_task.c b/erts/emulator/beam/erl_port_task.c index 0f1a0d441a..86454fe1fa 100644 --- a/erts/emulator/beam/erl_port_task.c +++ b/erts/emulator/beam/erl_port_task.c @@ -56,12 +56,6 @@ #define ERTS_PORT_IS_IN_RUNQ(RQ, P) \ ((P)->sched.next || (P)->sched.prev || (RQ)->ports.start == (P)) -#define ERTS_PORT_NOT_IN_RUNQ(P) \ -do { \ - (P)->sched.prev = NULL; \ - (P)->sched.next = NULL; \ -} while (0) - #ifdef USE_VM_PROBES #define DTRACE_DRIVER(PROBE_NAME, PP) \ if (DTRACE_ENABLED(driver_ready_input)) { \ @@ -167,7 +161,7 @@ enqueue_port(ErtsRunQueue *runq, Port *pp) { ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(runq)); pp->sched.next = NULL; - pp->sched.prev = runq->ports.end; + pp->sched.in_runq = 1; if (runq->ports.end) { ASSERT(runq->ports.start); runq->ports.end->sched.next = pp; @@ -177,39 +171,10 @@ enqueue_port(ErtsRunQueue *runq, Port *pp) runq->ports.start = pp; } - runq->ports.info.len++; - if (runq->ports.info.max_len < runq->ports.info.len) - runq->ports.info.max_len = runq->ports.info.len; - runq->len++; - if (runq->max_len < runq->len) - runq->max_len = runq->len; runq->ports.end = pp; ASSERT(runq->ports.start && runq->ports.end); -} -static ERTS_INLINE void -dequeue_port(ErtsRunQueue *runq, Port *pp) -{ - ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(runq)); - if (pp->sched.next) - pp->sched.next->sched.prev = pp->sched.prev; - else { - ASSERT(runq->ports.end == pp); - runq->ports.end = pp->sched.prev; - } - if (pp->sched.prev) - pp->sched.prev->sched.next = pp->sched.next; - else { - ASSERT(runq->ports.start == pp); - runq->ports.start = pp->sched.next; - } - - ASSERT(runq->ports.info.len > 0); - runq->ports.info.len--; - ASSERT(runq->len > 0); - runq->len--; - ASSERT(runq->ports.start || !runq->ports.end); - ASSERT(runq->ports.end || !runq->ports.start); + erts_smp_inc_runq_len(runq, &runq->ports.info, ERTS_PORT_PRIO_LEVEL); } static ERTS_INLINE Port * @@ -222,16 +187,11 @@ pop_port(ErtsRunQueue *runq) } else { runq->ports.start = runq->ports.start->sched.next; - if (runq->ports.start) - runq->ports.start->sched.prev = NULL; - else { + if (!runq->ports.start) { ASSERT(runq->ports.end == pp); runq->ports.end = NULL; } - ASSERT(runq->ports.info.len > 0); - runq->ports.info.len--; - ASSERT(runq->len > 0); - runq->len--; + erts_smp_dec_runq_len(runq, &runq->ports.info, ERTS_PORT_PRIO_LEVEL); } ASSERT(runq->ports.start || !runq->ports.end); @@ -285,7 +245,7 @@ check_port_queue(ErtsRunQueue *runq, Port *chk_pp, int inq) } ASSERT(no_forward == no_backward); } - ASSERT(no_forward == runq->ports.info.len); + ASSERT(no_forward == RUNQ_READ_LEN(&runq->ports.info.len)); if (chk_pp) { if (chk_pp->sched.taskq || chk_pp->sched.exe_taskq) { ASSERT(chk_pp->sched.taskq != chk_pp->sched.exe_taskq); @@ -467,10 +427,11 @@ erts_port_task_abort(Eterm id, ErtsPortTaskHandle *pthp) ErtsPortTaskQueue *ptqp; ErtsPortTask *ptp; Port *pp; - int port_is_dequeued = 0; pp = &erts_port[internal_port_index(id)]; runq = erts_port_runq(pp); + if (!runq) + return 1; ptp = handle2task(pthp); @@ -505,22 +466,12 @@ erts_port_task_abort(Eterm id, ErtsPortTaskHandle *pthp) if (ptqp->first || pp->sched.taskq != ptqp) ptqp = NULL; - else { + else pp->sched.taskq = NULL; - if (!pp->sched.exe_taskq) { - dequeue_port(runq, pp); - ERTS_PORT_NOT_IN_RUNQ(pp); - port_is_dequeued = 1; - } - } ERTS_PT_CHK_PRES_PORTQ(runq, pp); erts_smp_runq_unlock(runq); - - if (erts_system_profile_flags.runnable_ports && port_is_dequeued) { - profile_runnable_port(pp, am_inactive); - } port_task_free(ptp); if (ptqp) @@ -575,7 +526,7 @@ erts_port_task_schedule(Eterm id, if (!pp->sched.taskq) { pp->sched.taskq = port_taskq_init(port_taskq_alloc(), pp); - enq_port = !pp->sched.exe_taskq; + enq_port = !pp->sched.in_runq && !pp->sched.exe_taskq; } #ifdef ERTS_SMP @@ -585,13 +536,13 @@ erts_port_task_schedule(Eterm id, /* Port emigrated ... */ erts_smp_atomic_set_nob(&pp->run_queue, (erts_aint_t) xrunq); erts_smp_runq_unlock(runq); - runq = xrunq; + runq = erts_port_runq(pp); + if (!runq) + return -1; } } #endif - ASSERT(!enq_port || !(runq->flags & ERTS_RUNQ_FLG_SUSPENDED)); - ASSERT(pp->sched.taskq); ASSERT(ptp); @@ -633,7 +584,7 @@ erts_port_task_schedule(Eterm id, #elif defined(DEBUG) if (!enq_port && !pp->sched.exe_taskq) { /* We should be in port run q */ - ASSERT(pp->sched.prev || runq->ports.start == pp); + ASSERT(pp->sched.in_runq); } #endif #endif @@ -661,63 +612,54 @@ void erts_port_task_free_port(Port *pp) { ErtsRunQueue *runq; - int port_is_dequeued = 0; + ErtsPortTaskQueue *ptqp; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(pp)); ASSERT(!(pp->status & ERTS_PORT_SFLGS_DEAD)); runq = erts_port_runq(pp); ASSERT(runq); ERTS_PT_CHK_PRES_PORTQ(runq, pp); - if (pp->sched.exe_taskq) { + ptqp = pp->sched.exe_taskq; + if (ptqp) { /* I (this thread) am currently executing this port, free it when scheduled out... */ - ErtsPortTask *ptp = port_task_alloc(); + ErtsPortTask *ptp; + enqueue_free: + ptp = port_task_alloc(); erts_smp_port_state_lock(pp); pp->status &= ~ERTS_PORT_SFLG_CLOSING; pp->status |= ERTS_PORT_SFLG_FREE_SCHEDULED; erts_may_save_closed_port(pp); erts_smp_port_state_unlock(pp); - ERTS_SMP_LC_ASSERT(erts_smp_atomic_read_nob(&pp->refc) > 1); + ERTS_LC_ASSERT(erts_smp_atomic_read_nob(&pp->refc) > 1); ptp->type = ERTS_PORT_TASK_FREE; ptp->event = (ErlDrvEvent) -1; ptp->event_data = NULL; set_handle(ptp, NULL); - push_task(pp->sched.exe_taskq, ptp); + push_task(ptqp, ptp); ERTS_PT_CHK_PRES_PORTQ(runq, pp); erts_smp_runq_unlock(runq); } else { - ErtsPortTaskQueue *ptqp = pp->sched.taskq; - if (ptqp) { - dequeue_port(runq, pp); - ERTS_PORT_NOT_IN_RUNQ(pp); - port_is_dequeued = 1; + if (pp->sched.in_runq) { + ptqp = pp->sched.taskq; + if (!ptqp) + pp->sched.taskq = ptqp = port_taskq_init(port_taskq_alloc(), pp); + goto enqueue_free; } + ASSERT(!pp->sched.taskq); erts_smp_port_state_lock(pp); pp->status &= ~ERTS_PORT_SFLG_CLOSING; pp->status |= ERTS_PORT_SFLG_FREE_SCHEDULED; erts_may_save_closed_port(pp); erts_smp_port_state_unlock(pp); -#ifdef ERTS_SMP erts_smp_atomic_dec_nob(&pp->refc); /* Not alive */ -#endif - ERTS_SMP_LC_ASSERT(erts_smp_atomic_read_nob(&pp->refc) > 0); /* Lock */ + ERTS_LC_ASSERT(erts_smp_atomic_read_nob(&pp->refc) > 0); /* Lock */ handle_remaining_tasks(runq, pp); /* May release runq lock */ ASSERT(!pp->sched.exe_taskq && (!ptqp || !ptqp->first)); pp->sched.taskq = NULL; ERTS_PT_CHK_PRES_PORTQ(runq, pp); -#ifndef ERTS_SMP - ASSERT(pp->status & ERTS_PORT_SFLG_PORT_DEBUG); - erts_port_status_set(pp, ERTS_PORT_SFLG_FREE); -#endif erts_smp_runq_unlock(runq); - - if (erts_system_profile_flags.runnable_ports && port_is_dequeued) { - profile_runnable_port(pp, am_inactive); - } - - if (ptqp) - port_taskq_free(ptqp); } } @@ -738,7 +680,6 @@ typedef struct { int erts_port_task_execute(ErtsRunQueue *runq, Port **curr_port_pp) { - int port_was_enqueued = 0; Port *pp; ErtsPortTaskQueue *ptqp; ErtsPortTask *ptp; @@ -757,11 +698,18 @@ erts_port_task_execute(ErtsRunQueue *runq, Port **curr_port_pp) goto done; } - ERTS_PORT_NOT_IN_RUNQ(pp); + ASSERT(pp->sched.in_runq); + pp->sched.in_runq = 0; + if (!pp->sched.taskq) { + if (erts_system_profile_flags.runnable_ports) + profile_runnable_port(pp, am_inactive); + res = (erts_smp_atomic_read_nob(&erts_port_task_outstanding_io_tasks) + != (erts_aint_t) 0); + goto done; + } *curr_port_pp = pp; - ASSERT(pp->sched.taskq); ASSERT(pp->sched.taskq->first); ptqp = pp->sched.taskq; pp->sched.taskq = NULL; @@ -823,12 +771,8 @@ erts_port_task_execute(ErtsRunQueue *runq, Port **curr_port_pp) handle_remaining_tasks(runq, pp); ASSERT(!ptqp->first && (!pp->sched.taskq || !pp->sched.taskq->first)); -#ifdef ERTS_SMP erts_smp_atomic_dec_nob(&pp->refc); /* Not alive */ - ERTS_SMP_LC_ASSERT(erts_smp_atomic_read_nob(&pp->refc) > 0); /* Lock */ -#else - erts_port_status_bor_set(pp, ERTS_PORT_SFLG_FREE); -#endif + ERTS_LC_ASSERT(erts_smp_atomic_read_nob(&pp->refc) > 0); /* Lock */ port_task_free(ptp); if (pp->sched.taskq) @@ -918,6 +862,8 @@ erts_port_task_execute(ErtsRunQueue *runq, Port **curr_port_pp) if (!pp->sched.taskq) { ASSERT(pp->sched.exe_taskq); pp->sched.exe_taskq = NULL; + if (erts_system_profile_flags.runnable_ports) + profile_runnable_port(pp, am_inactive); } else { #ifdef ERTS_SMP @@ -940,14 +886,20 @@ erts_port_task_execute(ErtsRunQueue *runq, Port **curr_port_pp) else { /* Port emigrated ... */ erts_smp_atomic_set_nob(&pp->run_queue, (erts_aint_t) xrunq); - enqueue_port(xrunq, pp); - ASSERT(pp->sched.exe_taskq); - pp->sched.exe_taskq = NULL; - erts_smp_runq_unlock(xrunq); - erts_smp_notify_inc_runq(xrunq); + erts_smp_runq_unlock(runq); + + xrunq = erts_port_runq(pp); + if (xrunq) { + enqueue_port(xrunq, pp); + ASSERT(pp->sched.exe_taskq); + pp->sched.exe_taskq = NULL; + erts_smp_runq_unlock(xrunq); + erts_smp_notify_inc_runq(xrunq); + } + + erts_smp_runq_lock(runq); } #endif - port_was_enqueued = 1; } res = (erts_smp_atomic_read_nob(&erts_port_task_outstanding_io_tasks) @@ -957,10 +909,6 @@ erts_port_task_execute(ErtsRunQueue *runq, Port **curr_port_pp) port_taskq_free(ptqp); - if (erts_system_profile_flags.runnable_ports && (port_was_enqueued != 1)) { - profile_runnable_port(pp, am_inactive); - } - /* trace port scheduling, out */ if (IS_TRACED_FL(pp, F_TRACE_SCHED_PORTS)) { trace_sched_ports(pp, am_out); @@ -1049,63 +997,33 @@ erts_port_is_scheduled(Port *pp) { int res; ErtsRunQueue *runq = erts_port_runq(pp); + if (!runq) + return 0; res = pp->sched.taskq || pp->sched.exe_taskq; erts_smp_runq_unlock(runq); return res; } #ifdef ERTS_SMP +void +erts_enqueue_port(ErtsRunQueue *rq, Port *pp) +{ + ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); + ASSERT(rq == (ErtsRunQueue *) erts_smp_atomic_read_nob(&pp->run_queue)); + ASSERT(pp->sched.in_runq); + enqueue_port(rq, pp); +} -ErtsMigrateResult -erts_port_migrate(Port *prt, int *prt_locked, - ErtsRunQueue *from_rq, int *from_locked, - ErtsRunQueue *to_rq, int *to_locked) +Port * +erts_dequeue_port(ErtsRunQueue *rq) { - ERTS_SMP_LC_ASSERT(*from_locked); - ERTS_SMP_LC_CHK_RUNQ_LOCK(from_rq, *from_locked); - ERTS_SMP_LC_CHK_RUNQ_LOCK(to_rq, *to_locked); - - if (!*from_locked || !*to_locked) { - if (from_rq < to_rq) { - if (!*to_locked) { - if (!*from_locked) - erts_smp_runq_lock(from_rq); - erts_smp_runq_lock(to_rq); - } - else if (erts_smp_runq_trylock(from_rq) == EBUSY) { - erts_smp_runq_unlock(to_rq); - erts_smp_runq_lock(from_rq); - erts_smp_runq_lock(to_rq); - } - } - else { - if (!*from_locked) { - if (!*to_locked) - erts_smp_runq_lock(to_rq); - erts_smp_runq_lock(from_rq); - } - else if (erts_smp_runq_trylock(to_rq) == EBUSY) { - erts_smp_runq_unlock(from_rq); - erts_smp_runq_lock(to_rq); - erts_smp_runq_lock(from_rq); - } - } - *to_locked = *from_locked = 1; - } - ERTS_SMP_LC_CHK_RUNQ_LOCK(from_rq, *from_locked); - ERTS_SMP_LC_CHK_RUNQ_LOCK(to_rq, *to_locked); - - /* Refuse to migrate to a suspended run queue */ - if (to_rq->flags & ERTS_RUNQ_FLG_SUSPENDED) - return ERTS_MIGRATE_FAILED_RUNQ_SUSPENDED; - if (from_rq != (ErtsRunQueue *) erts_smp_atomic_read_nob(&prt->run_queue)) - return ERTS_MIGRATE_FAILED_RUNQ_CHANGED; - if (!ERTS_PORT_IS_IN_RUNQ(from_rq, prt)) - return ERTS_MIGRATE_FAILED_NOT_IN_RUNQ; - dequeue_port(from_rq, prt); - erts_smp_atomic_set_nob(&prt->run_queue, (erts_aint_t) to_rq); - enqueue_port(to_rq, prt); - return ERTS_MIGRATE_SUCCESS; + Port *pp; + ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); + pp = pop_port(rq); + ASSERT(!pp + || rq == (ErtsRunQueue *) erts_smp_atomic_read_nob(&pp->run_queue)); + ASSERT(!pp || pp->sched.in_runq); + return pp; } #endif diff --git a/erts/emulator/beam/erl_port_task.h b/erts/emulator/beam/erl_port_task.h index d7104e1143..fd88b1c1ff 100644 --- a/erts/emulator/beam/erl_port_task.h +++ b/erts/emulator/beam/erl_port_task.h @@ -62,7 +62,7 @@ typedef struct ErtsPortTaskQueue_ ErtsPortTaskQueue; typedef struct { Port *next; - Port *prev; + int in_runq; ErtsPortTaskQueue *taskq; ErtsPortTaskQueue *exe_taskq; } ErtsPortTaskSched; @@ -92,7 +92,7 @@ ERTS_GLB_INLINE void erts_port_task_init_sched(ErtsPortTaskSched *ptsp) { ptsp->next = NULL; - ptsp->prev = NULL; + ptsp->in_runq = 0; ptsp->taskq = NULL; ptsp->exe_taskq = NULL; } @@ -123,13 +123,10 @@ int erts_port_task_schedule(Eterm, ErlDrvEventData); void erts_port_task_free_port(Port *); int erts_port_is_scheduled(Port *); + #ifdef ERTS_SMP -ErtsMigrateResult erts_port_migrate(Port *, - int *, - ErtsRunQueue *, - int *, - ErtsRunQueue *, - int *); +void erts_enqueue_port(ErtsRunQueue *rq, Port *pp); +Port *erts_dequeue_port(ErtsRunQueue *rq); #endif #undef ERTS_INCLUDE_SCHEDULER_INTERNALS #endif /* ERL_PORT_TASK_H__ */ diff --git a/erts/emulator/beam/erl_printf_term.c b/erts/emulator/beam/erl_printf_term.c index 34da9cab84..2320b64295 100644 --- a/erts/emulator/beam/erl_printf_term.c +++ b/erts/emulator/beam/erl_printf_term.c @@ -437,7 +437,10 @@ print_term(fmtfn_t fn, void* arg, Eterm obj, long *dcount, } break; case BINARY_DEF: - { + if (header_is_bin_matchstate(*boxed_val(wobj))) { + PRINT_STRING(res, fn, arg, "#MatchState"); + } + else { ProcBin* pb = (ProcBin *) binary_val(wobj); if (pb->size == 1) PRINT_STRING(res, fn, arg, "<<1 byte>>"); diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c index bd4c56eaa4..bca8fac259 100644 --- a/erts/emulator/beam/erl_process.c +++ b/erts/emulator/beam/erl_process.c @@ -94,34 +94,194 @@ #define HIGH_BIT (1 << PRIORITY_HIGH) #define NORMAL_BIT (1 << PRIORITY_NORMAL) #define LOW_BIT (1 << PRIORITY_LOW) +#define PORT_BIT (1 << ERTS_PORT_PRIO_LEVEL) -#define ERTS_MAYBE_SAVE_TERMINATING_PROCESS(P) \ -do { \ - ERTS_SMP_LC_ASSERT(erts_lc_mtx_is_locked(&proc_tab_mtx)); \ - if (saved_term_procs.end) \ - save_terminating_process((P)); \ -} while (0) +#define ERTS_EMPTY_RUNQ(RQ) \ + ((ERTS_RUNQ_FLGS_GET_NOB((RQ)) & ERTS_RUNQ_FLGS_QMASK) == 0 \ + && (RQ)->misc.start == NULL) + +#undef RUNQ_READ_RQ +#undef RUNQ_SET_RQ +#define RUNQ_READ_RQ(X) ((ErtsRunQueue *) erts_smp_atomic_read_nob((X))) +#define RUNQ_SET_RQ(X, RQ) erts_smp_atomic_set_nob((X), (erts_aint_t) (RQ)) -#define ERTS_EMPTY_RUNQ(RQ) \ - ((RQ)->len == 0 && (RQ)->misc.start == NULL) +#ifdef DEBUG +# if defined(ARCH_64) && !HALFWORD_HEAP +# define ERTS_DBG_SET_INVALID_RUNQP(RQP, N) \ + (RUNQ_SET_RQ((RQP), (0xdeadbeefdead0003LL | ((N) << 4))) +# define ERTS_DBG_VERIFY_VALID_RUNQP(RQP) \ +do { \ + ASSERT((RQP) != NULL); \ + ASSERT(((((Uint) (RQP)) & ((Uint) 0x3))) == ((Uint) 0)); \ + ASSERT((((Uint) (RQP)) & ~((Uint) 0xffff)) != ((Uint) 0xdeadbeefdead0000LL));\ +} while (0) +# else +# define ERTS_DBG_SET_INVALID_RUNQP(RQP, N) \ + (RUNQ_SET_RQ((RQP), (0xdead0003 | ((N) << 4)))) +# define ERTS_DBG_VERIFY_VALID_RUNQP(RQP) \ +do { \ + ASSERT((RQP) != NULL); \ + ASSERT(((((UWord) (RQP)) & ((UWord) 1))) == ((UWord) 0)); \ + ASSERT((((UWord) (RQP)) & ~((UWord) 0xffff)) != ((UWord) 0xdead0000)); \ +} while (0) +# endif +#else +# define ERTS_DBG_SET_INVALID_RUNQP(RQP, N) +# define ERTS_DBG_VERIFY_VALID_RUNQP(RQP) +#endif #define ERTS_EMPTY_RUNQ_PORTS(RQ) \ - ((RQ)->ports.info.len == 0 && (RQ)->misc.start == NULL) + (RUNQ_READ_LEN(&(RQ)->ports.info.len) == 0 && (RQ)->misc.start == NULL) extern BeamInstr beam_apply[]; extern BeamInstr beam_exit[]; extern BeamInstr beam_continue_exit[]; -static Sint p_last; -static Sint p_next; -static Sint p_serial; -static Uint p_serial_mask; -static Uint p_serial_shift; +#ifdef ARCH_32 + +union { + erts_smp_dw_atomic_t pid_data; + char align[ERTS_CACHE_LINE_SIZE]; +} last erts_align_attribute(ERTS_CACHE_LINE_SIZE); + + +static ERTS_INLINE Uint64 +dw_aint_to_uint64(erts_dw_aint_t *dw) +{ +#ifdef ETHR_SU_DW_NAINT_T__ + return (Uint64) dw->dw_sint; +#else + Uint64 res; + res = (Uint64) ((Uint32) dw->sint[ERTS_DW_AINT_HIGH_WORD]); + res <<= 32; + res |= (Uint64) ((Uint32) dw->sint[ERTS_DW_AINT_LOW_WORD]); + return res; +#endif +} + +static void +unint64_to_dw_aint(erts_dw_aint_t *dw, Uint64 val) +{ +#ifdef ETHR_SU_DW_NAINT_T__ + dw->dw_sint = (ETHR_SU_DW_NAINT_T__) val; +#else + dw->sint[ERTS_DW_AINT_LOW_WORD] = (erts_aint_t) (val & 0xffffffff); + dw->sint[ERTS_DW_AINT_HIGH_WORD] = (erts_aint_t) ((val >> 32) & 0xffffffff); +#endif +} + +static ERTS_INLINE void +last_pid_data_init_nob(Uint64 val) +{ + erts_dw_aint_t dw; + unint64_to_dw_aint(&dw, val); + erts_smp_dw_atomic_init_nob(&last.pid_data, &dw); +} + +static ERTS_INLINE void +last_pid_data_set_relb(Uint64 val) +{ + erts_dw_aint_t dw; + unint64_to_dw_aint(&dw, val); + erts_smp_dw_atomic_set_relb(&last.pid_data, &dw); +} + +static ERTS_INLINE Uint64 +last_pid_data_read_nob(void) +{ + erts_dw_aint_t dw; + erts_smp_dw_atomic_read_nob(&last.pid_data, &dw); + return dw_aint_to_uint64(&dw); +} + +static ERTS_INLINE Uint64 +last_pid_data_read_acqb(void) +{ + erts_dw_aint_t dw; + erts_smp_dw_atomic_read_acqb(&last.pid_data, &dw); + return dw_aint_to_uint64(&dw); +} + +static ERTS_INLINE Uint64 +last_pid_data_cmpxchg_relb(Uint64 new, Uint64 exp) +{ + erts_dw_aint_t dw_new, dw_xchg; + + unint64_to_dw_aint(&dw_new, new); + unint64_to_dw_aint(&dw_xchg, exp); + + if (erts_smp_dw_atomic_cmpxchg_relb(&last.pid_data, &dw_new, &dw_xchg)) + return exp; + else + return dw_aint_to_uint64(&dw_xchg); +} + +#elif defined(ARCH_64) + +union { + erts_smp_atomic_t pid_data; + char align[ERTS_CACHE_LINE_SIZE]; +} last erts_align_attribute(ERTS_CACHE_LINE_SIZE); + +static ERTS_INLINE void +last_pid_data_init_nob(Uint64 val) +{ + erts_smp_atomic_init_nob(&last.pid_data, (erts_aint_t) val); +} + +static ERTS_INLINE void +last_pid_data_set_relb(Uint64 val) +{ + erts_smp_atomic_set_relb(&last.pid_data, (erts_aint_t) val); +} + +static ERTS_INLINE Uint64 +last_pid_data_read_nob(void) +{ + return (Uint64) erts_smp_atomic_read_nob(&last.pid_data); +} + +static ERTS_INLINE Uint64 +last_pid_data_read_acqb(void) +{ + return (Uint64) erts_smp_atomic_read_acqb(&last.pid_data); +} + +static ERTS_INLINE Uint64 +last_pid_data_cmpxchg_relb(Uint64 new, Uint64 exp) +{ + return (Uint64) erts_smp_atomic_cmpxchg_relb(&last.pid_data, + (erts_aint_t) new, + (erts_aint_t) exp); +} + +#else +# error "Not 64-bit, nor 32-bit architecture..." +#endif + +static ERTS_INLINE int +last_pid_data_cmp(Uint64 lpd1, Uint64 lpd2) +{ + Uint64 lpd1_wrap; + + if (lpd1 == lpd2) + return 0; + + lpd1_wrap = lpd1 + (((Uint64) 1) << 63); + + if (lpd1 < lpd1_wrap) + return (lpd1 < lpd2 && lpd2 < lpd1_wrap) ? -1 : 1; + else + return (lpd1_wrap <= lpd2 && lpd2 < lpd1) ? 1 : -1; +} + + +#define ERTS_PID_DATA_MASK__ ((1 << _PID_DATA_SIZE) - 1) int erts_sched_compact_load; Uint erts_no_schedulers; -Uint erts_max_processes = ERTS_DEFAULT_MAX_PROCESSES; -Uint erts_process_tab_index_mask; + +ErtsProcTab erts_proc erts_align_attribute(ERTS_CACHE_LINE_SIZE); int erts_sched_thread_suggested_stack_size = -1; @@ -188,7 +348,7 @@ static struct { struct { int active_runqs; int reds; - int max_len; + erts_aint32_t max_len; } prev_rise; Uint n; } balance_info; @@ -208,7 +368,7 @@ erts_sched_stat_t erts_sched_stat; static erts_tsd_key_t sched_data_key; #endif -static erts_smp_mtx_t proc_tab_mtx; +erts_smp_rwmtx_t erts_proc_tab_rwmtx; static erts_smp_atomic32_t function_calls; @@ -231,7 +391,6 @@ typedef union { static ErtsAlignedSchedulerSleepInfo *aligned_sched_sleep_info; -Process** process_tab; static Uint last_reductions; static Uint last_exact_reductions; Uint erts_default_process_flags; @@ -257,11 +416,11 @@ struct ErtsTermProcElement_ { union { struct { Eterm pid; - SysTimeval spawned; - SysTimeval exited; + Uint64 spawned; + Uint64 exited; } process; struct { - SysTimeval time; + Uint64 interval; } bif_invocation; } u; }; @@ -369,6 +528,9 @@ dbg_chk_aux_work_val(erts_aint32_t value) #ifdef ERTS_SMP_SCHEDULERS_NEED_TO_CHECK_CHILDREN valid |= ERTS_SSI_AUX_WORK_CHECK_CHILDREN; #endif +#ifdef ERTS_SMP + valid |= ERTS_SSI_AUX_WORK_CODE_IX_ACTIVATION; +#endif #ifdef ERTS_SSI_AUX_WORK_REAP_PORTS valid |= ERTS_SSI_AUX_WORK_REAP_PORTS; #endif @@ -398,6 +560,53 @@ erts_smp_lc_runq_is_locked(ErtsRunQueue *runq) } #endif +static erts_interval_t *proc_interval; + +static void +proc_interval_init(void) +{ + proc_interval = erts_alloc_permanent_cache_aligned( + ERTS_ALC_T_PROC_INTERVAL, + sizeof(erts_interval_t)); + erts_smp_interval_init(proc_interval); +} + +static ERTS_INLINE Uint64 +get_proc_interval(void) +{ + return erts_smp_current_interval_nob(proc_interval); +} + +static ERTS_INLINE Uint64 +ensure_later_proc_interval(Uint64 interval) +{ + return erts_smp_ensure_later_interval_nob(proc_interval, interval); +} + +static ERTS_INLINE Uint64 +step_proc_interval(void) +{ + return erts_smp_step_interval_nob(proc_interval); +} + +Uint64 +erts_get_proc_interval(void) +{ + return get_proc_interval(); +} + +Uint64 +erts_ensure_later_proc_interval(Uint64 interval) +{ + return ensure_later_proc_interval(interval); +} + +Uint64 +erts_step_proc_interval(void) +{ + return step_proc_interval(); +} + void erts_pre_init_process(void) { @@ -447,7 +656,16 @@ erts_pre_init_process(void) void erts_init_process(int ncpu) { - Uint proc_bits = ERTS_PROC_BITS; + int proc_tab_sz; + int max_proc_bits; + int proc_bits = ERTS_PROC_BITS; + erts_smp_atomic_t *proc_entry; + char *proc_tab_end; + erts_smp_rwmtx_opt_t proc_tab_rwmtx_opts = ERTS_SMP_RWMTX_OPT_DEFAULT_INITER; + proc_tab_rwmtx_opts.type = ERTS_SMP_RWMTX_TYPE_EXTREMELY_FREQUENT_READ; + proc_tab_rwmtx_opts.lived = ERTS_SMP_RWMTX_LONG_LIVED; + + proc_interval_init(); #ifdef ERTS_SMP erts_disable_proc_not_running_opt = 0; @@ -458,23 +676,51 @@ erts_init_process(int ncpu) erts_smp_atomic32_init_nob(&process_count, 0); - if (erts_use_r9_pids_ports) { + if (erts_use_r9_pids_ports) proc_bits = ERTS_R9_PROC_BITS; - ASSERT(erts_max_processes <= (1 << ERTS_R9_PROC_BITS)); + + if (erts_proc.max > (1 << proc_bits)) + erts_proc.max = 1 << proc_bits; + + proc_tab_sz = ERTS_ALC_CACHE_LINE_ALIGN_SIZE(erts_proc.max + * sizeof(erts_smp_atomic_t)); + erts_proc.tab = erts_alloc(ERTS_ALC_T_PROC_TABLE, proc_tab_sz); + proc_tab_end = ((char *) erts_proc.tab) + proc_tab_sz; + proc_entry = erts_proc.tab; + while (proc_tab_end > ((char *) proc_entry)) { + erts_smp_atomic_init_nob(proc_entry, ERTS_AINT_NULL); + proc_entry++; } - process_tab = (Process**) erts_alloc(ERTS_ALC_T_PROC_TABLE, - erts_max_processes*sizeof(Process*)); - sys_memzero(process_tab, erts_max_processes * sizeof(Process*)); + erts_smp_rwmtx_init_opt(&erts_proc_tab_rwmtx, + &proc_tab_rwmtx_opts, + "proc_tab"); + last_pid_data_init_nob(~((Uint64) 0)); - erts_smp_mtx_init(&proc_tab_mtx, "proc_tab"); - p_last = -1; - p_next = 0; - p_serial = 0; + max_proc_bits = erts_fit_in_bits_int32((Sint32) erts_proc.max - 1); + + erts_proc.tab_cache_lines = proc_tab_sz/ERTS_CACHE_LINE_SIZE; + erts_proc.pix_per_cache_line = ERTS_CACHE_LINE_SIZE/sizeof(erts_smp_atomic_t); + if ((erts_proc.max & (erts_proc.max - 1)) + | (erts_proc.pix_per_cache_line & (erts_proc.pix_per_cache_line - 1))) { + /* + * erts_proc.max or erts_proc.pix_per_cache_line + * not a power of 2 :( + */ + erts_proc.pix_cl_mask = 0; + erts_proc.pix_cl_shift = 0; + erts_proc.pix_cli_mask = 0; + erts_proc.pix_cli_shift = 0; + } + else { + ASSERT((erts_proc.tab_cache_lines + & (erts_proc.tab_cache_lines - 1)) == 0); + erts_proc.pix_cl_mask = erts_proc.tab_cache_lines-1; + erts_proc.pix_cl_shift = erts_fit_in_bits_int32(erts_proc.pix_per_cache_line-1); + erts_proc.pix_cli_shift = erts_fit_in_bits_int32(erts_proc.pix_cl_mask); + erts_proc.pix_cli_mask = (1 << (max_proc_bits - erts_proc.pix_cli_shift)) - 1; + } - p_serial_shift = erts_fit_in_bits(erts_max_processes - 1); - p_serial_mask = ((~(~((Uint) 0) << proc_bits)) >> p_serial_shift); - erts_process_tab_index_mask = ~(~((Uint) 0) << p_serial_shift); last_reductions = 0; last_exact_reductions = 0; erts_default_process_flags = 0; @@ -732,8 +978,9 @@ static ERTS_INLINE ErtsProcList * proclist_create(Process *p) { ErtsProcList *plp = proclist_alloc(); + ensure_later_proc_interval(p->started_interval); plp->pid = p->id; - plp->started = p->started; + plp->started_interval = p->started_interval; return plp; } @@ -746,8 +993,7 @@ proclist_destroy(ErtsProcList *plp) static ERTS_INLINE int proclist_same(ErtsProcList *plp, Process *p) { - return (plp->pid == p->id - && erts_cmp_timeval(&plp->started, &p->started) == 0); + return plp->pid == p->id && plp->started_interval == p->started_interval; } ErtsProcList * @@ -1145,7 +1391,45 @@ handle_async_ready_clean(ErtsAuxWorkData *awdp, } } +#endif /* ERTS_USE_ASYNC_READY_Q */ + +#ifdef ERTS_SMP +void +erts_notify_code_ix_activation(Process* p, ErtsThrPrgrVal later) +{ + ErtsAuxWorkData* awdp = &p->scheduler_data->aux_work_data; + ASSERT(awdp->code_ix_activation.code_stager == NULL); + awdp->code_ix_activation.code_stager = p; + awdp->code_ix_activation.thr_prgr = later; + erts_smp_proc_inc_refc(p); + set_aux_work_flags_wakeup_relb(p->scheduler_data->ssi, + ERTS_SSI_AUX_WORK_CODE_IX_ACTIVATION); +} + +static erts_aint32_t +handle_code_ix_activation(ErtsAuxWorkData *awdp, erts_aint32_t aux_work) +{ + Process* p; + if (!erts_thr_progress_has_reached(awdp->code_ix_activation.thr_prgr)) { + return aux_work & ~ERTS_SSI_AUX_WORK_CODE_IX_ACTIVATION; + } + unset_aux_work_flags(awdp->ssi, ERTS_SSI_AUX_WORK_CODE_IX_ACTIVATION); + p = awdp->code_ix_activation.code_stager; + ASSERT(p); +#ifdef DEBUG + awdp->code_ix_activation.code_stager = NULL; #endif + erts_commit_staging_code_ix(); + erts_release_code_write_permission(); + erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); + if (!ERTS_PROC_IS_EXITING(p)) { + erts_resume(p, ERTS_PROC_LOCK_STATUS); + } + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + erts_smp_proc_dec_refc(p); + return aux_work & ~ERTS_SSI_AUX_WORK_CODE_IX_ACTIVATION; +} +#endif /* ERTS_SMP */ static ERTS_INLINE erts_aint32_t handle_fix_alloc(ErtsAuxWorkData *awdp, erts_aint32_t aux_work) @@ -1510,6 +1794,11 @@ handle_aux_work(ErtsAuxWorkData *awdp, erts_aint32_t orig_aux_work) handle_mseg_cache_check); #endif +#ifdef ERTS_SMP + HANDLE_AUX_WORK(ERTS_SSI_AUX_WORK_CODE_IX_ACTIVATION, + handle_code_ix_activation); +#endif + HANDLE_AUX_WORK(ERTS_SSI_AUX_WORK_REAP_PORTS, handle_reap_ports); @@ -1666,8 +1955,8 @@ sched_waiting_sys(Uint no, ErtsRunQueue *rq) { ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); ASSERT(rq->waiting >= 0); - rq->flags |= (ERTS_RUNQ_FLG_OUT_OF_WORK - | ERTS_RUNQ_FLG_HALFTIME_OUT_OF_WORK); + ERTS_RUNQ_FLGS_SET(rq, (ERTS_RUNQ_FLG_OUT_OF_WORK + | ERTS_RUNQ_FLG_HALFTIME_OUT_OF_WORK)); rq->waiting++; rq->waiting *= -1; rq->woken = 0; @@ -1743,8 +2032,8 @@ static ERTS_INLINE void sched_waiting(Uint no, ErtsRunQueue *rq) { ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); - rq->flags |= (ERTS_RUNQ_FLG_OUT_OF_WORK - | ERTS_RUNQ_FLG_HALFTIME_OUT_OF_WORK); + ERTS_RUNQ_FLGS_SET(rq, (ERTS_RUNQ_FLG_OUT_OF_WORK + | ERTS_RUNQ_FLG_HALFTIME_OUT_OF_WORK)); if (rq->waiting < 0) rq->waiting--; else @@ -1776,9 +2065,8 @@ ongoing_multi_scheduling_block(void) static ERTS_INLINE void empty_runq(ErtsRunQueue *rq) { - erts_aint32_t oifls = erts_smp_atomic32_read_band_nob(&rq->info_flags, - ~ERTS_RUNQ_IFLG_NONEMPTY); - if (oifls & ERTS_RUNQ_IFLG_NONEMPTY) { + Uint32 old_flags = ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_NONEMPTY|ERTS_RUNQ_FLG_PROTECTED); + if (old_flags & ERTS_RUNQ_FLG_NONEMPTY) { #ifdef DEBUG erts_aint32_t empty = erts_smp_atomic32_read_nob(&no_empty_run_queues); /* @@ -1794,9 +2082,8 @@ empty_runq(ErtsRunQueue *rq) static ERTS_INLINE void non_empty_runq(ErtsRunQueue *rq) { - erts_aint32_t oifls = erts_smp_atomic32_read_bor_nob(&rq->info_flags, - ERTS_RUNQ_IFLG_NONEMPTY); - if (!(oifls & ERTS_RUNQ_IFLG_NONEMPTY)) { + Uint32 old_flags = ERTS_RUNQ_FLGS_SET(rq, ERTS_RUNQ_FLG_NONEMPTY); + if (!(old_flags & ERTS_RUNQ_FLG_NONEMPTY)) { #ifdef DEBUG erts_aint32_t empty = erts_smp_atomic32_read_nob(&no_empty_run_queues); /* @@ -2411,19 +2698,16 @@ try_inc_no_active_runqs(int active) static ERTS_INLINE int chk_wake_sched(ErtsRunQueue *crq, int ix, int activate) { - erts_aint32_t iflgs; + Uint32 flags; ErtsRunQueue *wrq; if (crq->ix == ix) return 0; wrq = ERTS_RUNQ_IX(ix); - iflgs = erts_smp_atomic32_read_nob(&wrq->info_flags); - if (!(iflgs & (ERTS_RUNQ_IFLG_SUSPENDED|ERTS_RUNQ_IFLG_NONEMPTY))) { + flags = ERTS_RUNQ_FLGS_GET(wrq); + if (!(flags & (ERTS_RUNQ_FLG_SUSPENDED|ERTS_RUNQ_FLG_NONEMPTY))) { if (activate) { - if (try_inc_no_active_runqs(ix+1)) { - erts_smp_xrunq_lock(crq, wrq); - wrq->flags &= ~ERTS_RUNQ_FLG_INACTIVE; - erts_smp_xrunq_unlock(crq, wrq); - } + if (try_inc_no_active_runqs(ix+1)) + ERTS_RUNQ_FLGS_UNSET(wrq, ERTS_RUNQ_FLG_INACTIVE); } wake_scheduler(wrq, 0); return 1; @@ -2490,9 +2774,7 @@ erts_sched_notify_check_cpu_bind(void) int ix; for (ix = 0; ix < erts_no_run_queues; ix++) { ErtsRunQueue *rq = ERTS_RUNQ_IX(ix); - erts_smp_runq_lock(rq); - rq->flags |= ERTS_RUNQ_FLG_CHK_CPU_BIND; - erts_smp_runq_unlock(rq); + ERTS_RUNQ_FLGS_SET(rq, ERTS_RUNQ_FLG_CHK_CPU_BIND); wake_scheduler(rq, 0); } #else @@ -2501,409 +2783,547 @@ erts_sched_notify_check_cpu_bind(void) } -#ifdef ERTS_SMP +static ERTS_INLINE void +enqueue_process(ErtsRunQueue *runq, int prio, Process *p) +{ + ErtsRunPrioQueue *rpq; -ErtsRunQueue * -erts_prepare_emigrate(ErtsRunQueue *c_rq, ErtsRunQueueInfo *c_rqi, int prio) + ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(runq)); + + erts_smp_inc_runq_len(runq, &runq->procs.prio_info[prio], prio); + + if (prio == PRIORITY_LOW) { + p->schedule_count = RESCHEDULE_LOW; + rpq = &runq->procs.prio[PRIORITY_NORMAL]; + } + else { + p->schedule_count = 1; + rpq = &runq->procs.prio[prio]; + } + + p->next = NULL; + if (rpq->last) + rpq->last->next = p; + else + rpq->first = p; + rpq->last = p; +} + + +static ERTS_INLINE void +unqueue_process(ErtsRunQueue *runq, + ErtsRunPrioQueue *rpq, + ErtsRunQueueInfo *rqi, + int prio, + Process *prev_proc, + Process *proc) { - ASSERT(ERTS_CHK_RUNQ_FLG_EMIGRATE(c_rq->flags, prio)); - ASSERT(ERTS_CHK_RUNQ_FLG_EVACUATE(c_rq->flags, prio) - || c_rqi->len >= c_rqi->migrate.limit.this); + ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(runq)); - while (1) { - ErtsRunQueue *n_rq = c_rqi->migrate.runq; - ERTS_DBG_VERIFY_VALID_RUNQP(n_rq); - erts_smp_xrunq_lock(c_rq, n_rq); - - /* - * erts_smp_xrunq_lock() may release lock on c_rq! We have - * to check that we still want to emigrate and emigrate - * to the same run queue as before. - */ + if (prev_proc) + prev_proc->next = proc->next; + else + rpq->first = proc->next; + if (!proc->next) + rpq->last = prev_proc; - if (ERTS_CHK_RUNQ_FLG_EMIGRATE(c_rq->flags, prio)) { - Uint32 force = (ERTS_CHK_RUNQ_FLG_EVACUATE(c_rq->flags, prio) - | (c_rq->flags & ERTS_RUNQ_FLG_INACTIVE)); - if (force || c_rqi->len > c_rqi->migrate.limit.this) { - ErtsRunQueueInfo *n_rqi; - /* We still want to emigrate */ - - if (n_rq != c_rqi->migrate.runq) { - /* Ahh... run queue changed; need to do it all over again... */ - erts_smp_runq_unlock(n_rq); - continue; - } - else { + if (!rpq->first) + rpq->last = NULL; - if (prio == ERTS_PORT_PRIO_LEVEL) - n_rqi = &n_rq->ports.info; - else - n_rqi = &n_rq->procs.prio_info[prio]; + erts_smp_dec_runq_len(runq, rqi, prio); +} - if (force || (n_rqi->len < c_rqi->migrate.limit.other)) { - /* emigrate ... */ - return n_rq; - } - } - } - } - ASSERT(n_rq != c_rq); - erts_smp_runq_unlock(n_rq); - if (!(c_rq->flags & ERTS_RUNQ_FLG_INACTIVE)) { - /* No more emigrations to this runq */ - ERTS_UNSET_RUNQ_FLG_EMIGRATE(c_rq->flags, prio); - ERTS_DBG_SET_INVALID_RUNQP(c_rqi->migrate.runq, 0x3); - } +static ERTS_INLINE Process * +dequeue_process(ErtsRunQueue *runq, int prio_q, erts_aint32_t *statep) +{ + erts_aint32_t state; + int prio; + ErtsRunPrioQueue *rpq; + ErtsRunQueueInfo *rqi; + Process *p; + + ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(runq)); + + ASSERT(PRIORITY_NORMAL == prio_q + || PRIORITY_HIGH == prio_q + || PRIORITY_MAX == prio_q); + + rpq = &runq->procs.prio[prio_q]; + p = rpq->first; + if (!p) + return NULL; + + ERTS_SMP_DATA_DEPENDENCY_READ_MEMORY_BARRIER; + + state = erts_smp_atomic32_read_nob(&p->state); + if (statep) + *statep = state; + + prio = (int) (ERTS_PSFLG_PRIO_MASK & state); + + rqi = &runq->procs.prio_info[prio]; + + if (p) + unqueue_process(runq, rpq, rqi, prio, NULL, p); + return p; +} + +static ERTS_INLINE int +check_requeue_process(ErtsRunQueue *rq, int prio_q) +{ + ErtsRunPrioQueue *rpq = &rq->procs.prio[prio_q]; + Process *p = rpq->first; + if (--p->schedule_count > 0 && p != rpq->last) { + /* reschedule */ + rpq->first = p->next; + rpq->last->next = p; + rpq->last = p; + p->next = NULL; + return 1; + } + return 0; +} + +#ifdef ERTS_SMP + +static ErtsRunQueue * +check_immigration_need(ErtsRunQueue *c_rq, ErtsMigrationPath *mp, int prio) +{ + int len; + Uint32 f_flags, f_rq_flags; + ErtsRunQueue *f_rq; + + f_flags = mp->prio[prio].flags; + + ASSERT(ERTS_CHK_RUNQ_FLG_IMMIGRATE(mp->flags, prio)); + + f_rq = mp->prio[prio].runq; + if (!f_rq) + return NULL; + + f_rq_flags = ERTS_RUNQ_FLGS_GET(f_rq); + if (f_rq_flags & ERTS_RUNQ_FLG_PROTECTED) return NULL; + + if (ERTS_CHK_RUNQ_FLG_EVACUATE(f_flags, prio)) + return f_rq; + + if (f_rq_flags & ERTS_RUNQ_FLG_INACTIVE) + return f_rq; + + if (prio == ERTS_PORT_PRIO_LEVEL) + len = RUNQ_READ_LEN(&c_rq->ports.info.len); + else + len = RUNQ_READ_LEN(&c_rq->procs.prio_info[prio].len); + + if (len < mp->prio[prio].limit.this) { + if (prio == ERTS_PORT_PRIO_LEVEL) + len = RUNQ_READ_LEN(&f_rq->ports.info.len); + else + len = RUNQ_READ_LEN(&f_rq->procs.prio_info[prio].len); + + if (len > mp->prio[prio].limit.other) + return f_rq; } + return NULL; } static void -immigrate(ErtsRunQueue *rq) +immigrate(ErtsRunQueue *c_rq, ErtsMigrationPath *mp) { - int prio; + Uint32 iflags, iflag; + erts_smp_runq_unlock(c_rq); - ASSERT(rq->flags & ERTS_RUNQ_FLGS_IMMIGRATE_QMASK); + ASSERT(erts_thr_progress_is_managed_thread()); - for (prio = 0; prio < ERTS_NO_PRIO_LEVELS; prio++) { - if (ERTS_CHK_RUNQ_FLG_IMMIGRATE(rq->flags, prio)) { - ErtsRunQueueInfo *rqi = (prio == ERTS_PORT_PRIO_LEVEL - ? &rq->ports.info - : &rq->procs.prio_info[prio]); - ErtsRunQueue *from_rq = rqi->migrate.runq; - int rq_locked, from_rq_locked; + iflags = mp->flags & ERTS_RUNQ_FLGS_IMMIGRATE_QMASK; - ERTS_DBG_VERIFY_VALID_RUNQP(from_rq); + iflag = iflags & -iflags; - rq_locked = 1; - from_rq_locked = 1; - erts_smp_xrunq_lock(rq, from_rq); - /* - * erts_smp_xrunq_lock() may release lock on rq! We have - * to check that we still want to immigrate from the same - * run queue as before. - */ - if (ERTS_CHK_RUNQ_FLG_IMMIGRATE(rq->flags, prio) - && from_rq == rqi->migrate.runq) { - ErtsRunQueueInfo *from_rqi = (prio == ERTS_PORT_PRIO_LEVEL - ? &from_rq->ports.info - : &from_rq->procs.prio_info[prio]); - if ((ERTS_CHK_RUNQ_FLG_EVACUATE(rq->flags, prio) - && ERTS_CHK_RUNQ_FLG_EVACUATE(from_rq->flags, prio) - && from_rqi->len) - || (from_rqi->len > rqi->migrate.limit.other - && rqi->len < rqi->migrate.limit.this)) { - if (prio == ERTS_PORT_PRIO_LEVEL) { - Port *prt = from_rq->ports.start; - if (prt) { - int prt_locked = 0; - (void) erts_port_migrate(prt, &prt_locked, - from_rq, &from_rq_locked, - rq, &rq_locked); - if (prt_locked) - erts_smp_port_unlock(prt); - } - } - else { - Process *proc; - ErtsRunPrioQueue *from_rpq; - from_rpq = (prio == PRIORITY_LOW - ? &from_rq->procs.prio[PRIORITY_NORMAL] - : &from_rq->procs.prio[prio]); - for (proc = from_rpq->first; proc; proc = proc->next) - if (proc->prio == prio && !proc->bound_runq) - break; - if (proc) { - ErtsProcLocks proc_locks = 0; - (void) erts_proc_migrate(proc, &proc_locks, - from_rq, &from_rq_locked, - rq, &rq_locked); - if (proc_locks) - erts_smp_proc_unlock(proc, proc_locks); - } + while (iflag) { + ErtsRunQueue *rq; + int prio; + + switch (iflag) { + case (MAX_BIT << ERTS_RUNQ_FLGS_IMMIGRATE_SHFT): + prio = PRIORITY_MAX; + break; + case (HIGH_BIT << ERTS_RUNQ_FLGS_IMMIGRATE_SHFT): + prio = PRIORITY_HIGH; + break; + case (NORMAL_BIT << ERTS_RUNQ_FLGS_IMMIGRATE_SHFT): + prio = PRIORITY_NORMAL; + break; + case (LOW_BIT << ERTS_RUNQ_FLGS_IMMIGRATE_SHFT): + prio = PRIORITY_LOW; + break; + case (PORT_BIT << ERTS_RUNQ_FLGS_IMMIGRATE_SHFT): + prio = ERTS_PORT_PRIO_LEVEL; + break; + default: + erl_exit(ERTS_ABORT_EXIT, + "%s:%d:%s(): Invalid immigrate queue mask", + __FILE__, __LINE__, __func__); + prio = 0; + break; + } + + iflags &= ~iflag; + iflag = iflags & -iflags; + + rq = check_immigration_need(c_rq, mp, prio); + if (rq) { + erts_smp_runq_lock(rq); + if (prio == ERTS_PORT_PRIO_LEVEL) { + Port *prt; + prt = erts_dequeue_port(rq); + if (prt) + RUNQ_SET_RQ(&prt->run_queue, c_rq); + erts_smp_runq_unlock(rq); + if (prt) { + /* port might terminate while we have no lock... */ + rq = erts_port_runq(prt); + if (rq) { + if (rq != c_rq) + erl_exit(ERTS_ABORT_EXIT, + "%s:%d:%s(): Internal error", + __FILE__, __LINE__, __func__); + erts_enqueue_port(c_rq, prt); + if (!iflag) + return; /* done */ + erts_smp_runq_unlock(c_rq); } } - else { - ERTS_UNSET_RUNQ_FLG_IMMIGRATE(rq->flags, prio); - ERTS_DBG_SET_INVALID_RUNQP(rqi->migrate.runq, 0x1); + } + else { + ErtsRunPrioQueue *rpq = &rq->procs.prio[prio == PRIORITY_LOW + ? PRIORITY_NORMAL + : prio]; + Process *prev_proc = NULL; + Process *proc = rpq->first; + int rq_locked = 1; + + while (proc) { + erts_aint32_t state; + state = erts_smp_atomic32_read_acqb(&proc->state); + if (!(ERTS_PSFLG_BOUND & state) + && (prio == (int) (ERTS_PSFLG_PRIO_MASK & state))) { + ErtsRunQueueInfo *rqi = &rq->procs.prio_info[prio]; + unqueue_process(rq, rpq, rqi, prio, prev_proc, proc); + erts_smp_runq_unlock(rq); + RUNQ_SET_RQ(&proc->run_queue, c_rq); + rq_locked = 0; + + erts_smp_runq_lock(c_rq); + enqueue_process(c_rq, prio, proc); + if (!iflag) + return; /* done */ + erts_smp_runq_unlock(c_rq); + break; + } + prev_proc = proc; + proc = proc->next; } + if (rq_locked) + erts_smp_runq_unlock(rq); } - if (from_rq_locked) - erts_smp_runq_unlock(from_rq); - if (!rq_locked) - erts_smp_runq_lock(rq); } } + + erts_smp_runq_lock(c_rq); +} + +static ERTS_INLINE void +suspend_run_queue(ErtsRunQueue *rq) +{ + erts_smp_atomic32_read_bor_nob(&rq->scheduler->ssi->flags, + ERTS_SSI_FLG_SUSPENDED); + ERTS_RUNQ_FLGS_SET(rq, ERTS_RUNQ_FLG_SUSPENDED); + + wake_scheduler(rq, 0); } +static void scheduler_ix_resume_wake(Uint ix); + +static ERTS_INLINE void +resume_run_queue(ErtsRunQueue *rq) +{ + int pix; + + erts_smp_runq_lock(rq); + + (void) ERTS_RUNQ_FLGS_MASK_SET(rq, + (ERTS_RUNQ_FLG_OUT_OF_WORK + | ERTS_RUNQ_FLG_HALFTIME_OUT_OF_WORK + | ERTS_RUNQ_FLG_SUSPENDED), + (ERTS_RUNQ_FLG_OUT_OF_WORK + | ERTS_RUNQ_FLG_HALFTIME_OUT_OF_WORK)); + + rq->check_balance_reds = ERTS_RUNQ_CALL_CHECK_BALANCE_REDS; + for (pix = 0; pix < ERTS_NO_PROC_PRIO_LEVELS; pix++) { + rq->procs.prio_info[pix].max_len = 0; + rq->procs.prio_info[pix].reds = 0; + } + rq->ports.info.max_len = 0; + rq->ports.info.reds = 0; + rq->max_len = 0; + + erts_smp_runq_unlock(rq); + + scheduler_ix_resume_wake(rq->ix); +} + +typedef struct { + Process *first; + Process *last; +} ErtsStuckBoundProcesses; + static void -evacuate_run_queue(ErtsRunQueue *evac_rq, ErtsRunQueue *rq) +schedule_bound_processes(ErtsRunQueue *rq, + ErtsStuckBoundProcesses *sbpp) { - Port *prt; - int notify_to_rq = 0; - int prio; - int prt_locked = 0; - int rq_locked = 0; - int evac_rq_locked = 1; - ErtsMigrateResult mres; + Process *proc, *next; + ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); - erts_smp_runq_lock(evac_rq); + proc = sbpp->first; + while (proc) { + erts_aint32_t state = erts_smp_atomic32_read_acqb(&proc->state); + next = proc->next; + enqueue_process(rq, (int) (ERTS_PSFLG_PRIO_MASK & state), proc); + proc = next; + } +} - erts_smp_atomic32_read_bor_nob(&evac_rq->scheduler->ssi->flags, - ERTS_SSI_FLG_SUSPENDED); +static void +evacuate_run_queue(ErtsRunQueue *rq, + ErtsStuckBoundProcesses *sbpp) +{ + int prio_q; + ErtsRunQueue *to_rq; + ErtsMigrationPaths *mps; + ErtsMigrationPath *mp; - evac_rq->flags &= ~ERTS_RUNQ_FLGS_IMMIGRATE_QMASK; - evac_rq->flags |= (ERTS_RUNQ_FLGS_EMIGRATE_QMASK - | ERTS_RUNQ_FLGS_EVACUATE_QMASK - | ERTS_RUNQ_FLG_SUSPENDED); + ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); - erts_smp_atomic32_read_bor_nob(&evac_rq->info_flags, ERTS_RUNQ_IFLG_SUSPENDED); - /* - * Need to set up evacuation paths first since we - * may release the run queue lock on evac_rq - * when evacuating. - */ - evac_rq->misc.evac_runq = rq; - evac_rq->ports.info.migrate.runq = rq; - for (prio = 0; prio < ERTS_NO_PROC_PRIO_LEVELS; prio++) - evac_rq->procs.prio_info[prio].migrate.runq = rq; + ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_PROTECTED); + + mps = erts_get_migration_paths_managed(); + mp = &mps->mpath[rq->ix]; /* Evacuate scheduled misc ops */ - if (evac_rq->misc.start) { - rq_locked = 1; - erts_smp_xrunq_lock(evac_rq, rq); - if (rq->misc.end) - rq->misc.end->next = evac_rq->misc.start; + if (rq->misc.start) { + ErtsMiscOpList *start, *end; + + to_rq = mp->misc_evac_runq; + if (!to_rq) + return; + + start = rq->misc.start; + end = rq->misc.end; + rq->misc.start = NULL; + rq->misc.end = NULL; + erts_smp_runq_unlock(rq); + + erts_smp_runq_lock(to_rq); + if (to_rq->misc.end) + to_rq->misc.end->next = start; else - rq->misc.start = evac_rq->misc.start; - rq->misc.end = evac_rq->misc.end; - evac_rq->misc.start = NULL; - evac_rq->misc.end = NULL; + to_rq->misc.start = start; + + to_rq->misc.end = end; + erts_smp_runq_unlock(to_rq); + smp_notify_inc_runq(to_rq); + erts_smp_runq_lock(to_rq); } - /* Evacuate scheduled ports */ - prt = evac_rq->ports.start; - while (prt) { - mres = erts_port_migrate(prt, &prt_locked, - evac_rq, &evac_rq_locked, - rq, &rq_locked); - if (mres == ERTS_MIGRATE_SUCCESS) - notify_to_rq = 1; - if (prt_locked) - erts_smp_port_unlock(prt); - if (!evac_rq_locked) { - evac_rq_locked = 1; - erts_smp_runq_lock(evac_rq); + if (rq->ports.start) { + Port *prt; + + to_rq = mp->prio[ERTS_PORT_PRIO_LEVEL].runq; + if (!to_rq) + return; + + /* Evacuate scheduled ports */ + prt = rq->ports.start; + while (prt) { + ErtsRunQueue *prt_rq; + prt = erts_dequeue_port(rq); + RUNQ_SET_RQ(&prt->run_queue, to_rq); + erts_smp_runq_unlock(rq); + /* + * The port might terminate while + * we have no lock on it... + */ + prt_rq = erts_port_runq(prt); + if (prt_rq) { + if (prt_rq != to_rq) + erl_exit(ERTS_ABORT_EXIT, + "%s:%d:%s() internal error\n", + __FILE__, __LINE__, __func__); + erts_enqueue_port(to_rq, prt); + erts_smp_runq_unlock(to_rq); + } + erts_smp_runq_lock(rq); + prt = rq->ports.start; } - prt = evac_rq->ports.start; + smp_notify_inc_runq(to_rq); } /* Evacuate scheduled processes */ - for (prio = 0; prio < ERTS_NO_PROC_PRIO_LEVELS; prio++) { + for (prio_q = 0; prio_q < ERTS_NO_PROC_PRIO_QUEUES; prio_q++) { + erts_aint32_t state; Process *proc; + int notify = 0; + to_rq = NULL; - switch (prio) { - case PRIORITY_MAX: - case PRIORITY_HIGH: - case PRIORITY_NORMAL: - proc = evac_rq->procs.prio[prio].first; - while (proc) { - ErtsProcLocks proc_locks = 0; - - /* Bound processes are stuck... */ - while (proc->bound_runq) { - proc = proc->next; - if (!proc) - goto end_of_proc; - } - - mres = erts_proc_migrate(proc, &proc_locks, - evac_rq, &evac_rq_locked, - rq, &rq_locked); - if (mres == ERTS_MIGRATE_SUCCESS) - notify_to_rq = 1; - if (proc_locks) - erts_smp_proc_unlock(proc, proc_locks); - if (!evac_rq_locked) { - erts_smp_runq_lock(evac_rq); - evac_rq_locked = 1; - } + if (!mp->prio[prio_q].runq) + return; + if (prio_q == PRIORITY_NORMAL && !mp->prio[PRIORITY_LOW].runq) + return; - proc = evac_rq->procs.prio[prio].first; + proc = dequeue_process(rq, prio_q, &state); + while (proc) { + if (ERTS_PSFLG_BOUND & state) { + /* Bound processes get stuck here... */ + proc->next = NULL; + if (sbpp->last) + sbpp->last->next = proc; + else + sbpp->first = proc; + sbpp->last = proc; } + else { + int prio = (int) (ERTS_PSFLG_PRIO_MASK & state); + erts_smp_runq_unlock(rq); - end_of_proc: + to_rq = mp->prio[prio].runq; + RUNQ_SET_RQ(&proc->run_queue, to_rq); -#ifdef DEBUG - for (proc = evac_rq->procs.prio[prio].first; - proc; - proc = proc->next) { - ASSERT(proc->bound_runq); + erts_smp_runq_lock(to_rq); + enqueue_process(to_rq, prio, proc); + erts_smp_runq_unlock(to_rq); + notify = 1; + + erts_smp_runq_lock(rq); } -#endif - break; - case PRIORITY_LOW: - break; - default: - ASSERT(!"Invalid process priority"); - break; + proc = dequeue_process(rq, prio_q, &state); } + if (notify) + smp_notify_inc_runq(to_rq); } - if (rq_locked) - erts_smp_runq_unlock(rq); - - if (evac_rq_locked) - erts_smp_runq_unlock(evac_rq); - - if (notify_to_rq) - smp_notify_inc_runq(rq); - - wake_scheduler(evac_rq, 0); + if (ERTS_EMPTY_RUNQ(rq)) + empty_runq(rq); } static int -try_steal_task_from_victim(ErtsRunQueue *rq, int *rq_lockedp, ErtsRunQueue *vrq) +try_steal_task_from_victim(ErtsRunQueue *rq, int *rq_lockedp, ErtsRunQueue *vrq, Uint32 flags) { - Process *proc; - int vrq_locked; + Uint32 procs_qmask = flags & ERTS_RUNQ_FLGS_PROCS_QMASK; + int max_prio_bit; + ErtsRunPrioQueue *rpq; - if (*rq_lockedp) - erts_smp_xrunq_lock(rq, vrq); - else - erts_smp_runq_lock(vrq); - vrq_locked = 1; + if (*rq_lockedp) { + erts_smp_runq_unlock(rq); + *rq_lockedp = 0; + } - ERTS_SMP_LC_CHK_RUNQ_LOCK(rq, *rq_lockedp); - ERTS_SMP_LC_CHK_RUNQ_LOCK(vrq, vrq_locked); + ERTS_SMP_LC_ASSERT(!erts_smp_lc_runq_is_locked(rq)); + + erts_smp_runq_lock(vrq); if (rq->halt_in_progress) - goto try_steal_port; + goto no_procs; /* * Check for a runnable process to steal... */ - switch (vrq->flags & ERTS_RUNQ_FLGS_PROCS_QMASK) { - case MAX_BIT: - case MAX_BIT|HIGH_BIT: - case MAX_BIT|NORMAL_BIT: - case MAX_BIT|LOW_BIT: - case MAX_BIT|HIGH_BIT|NORMAL_BIT: - case MAX_BIT|HIGH_BIT|LOW_BIT: - case MAX_BIT|NORMAL_BIT|LOW_BIT: - case MAX_BIT|HIGH_BIT|NORMAL_BIT|LOW_BIT: - for (proc = vrq->procs.prio[PRIORITY_MAX].last; - proc; - proc = proc->prev) { - if (!proc->bound_runq) - break; - } - if (proc) + while (procs_qmask) { + Process *prev_proc; + Process *proc; + + max_prio_bit = procs_qmask & -procs_qmask; + switch (max_prio_bit) { + case MAX_BIT: + rpq = &vrq->procs.prio[PRIORITY_MAX]; break; - case HIGH_BIT: - case HIGH_BIT|NORMAL_BIT: - case HIGH_BIT|LOW_BIT: - case HIGH_BIT|NORMAL_BIT|LOW_BIT: - for (proc = vrq->procs.prio[PRIORITY_HIGH].last; - proc; - proc = proc->prev) { - if (!proc->bound_runq) - break; - } - if (proc) + case HIGH_BIT: + rpq = &vrq->procs.prio[PRIORITY_HIGH]; break; - case NORMAL_BIT: - case LOW_BIT: - case NORMAL_BIT|LOW_BIT: - for (proc = vrq->procs.prio[PRIORITY_NORMAL].last; - proc; - proc = proc->prev) { - if (!proc->bound_runq) - break; - } - if (proc) + case NORMAL_BIT: + case LOW_BIT: + rpq = &vrq->procs.prio[PRIORITY_NORMAL]; break; - case 0: - proc = NULL; - break; - default: - ASSERT(!"Invalid queue mask"); - proc = NULL; - break; - } + case 0: + goto no_procs; + default: + ASSERT(!"Invalid queue mask"); + goto no_procs; + } + + prev_proc = NULL; + proc = rpq->first; - if (proc) { - ErtsProcLocks proc_locks = 0; - int res; - ErtsMigrateResult mres; - mres = erts_proc_migrate(proc, &proc_locks, - vrq, &vrq_locked, - rq, rq_lockedp); - if (proc_locks) - erts_smp_proc_unlock(proc, proc_locks); - res = !0; - switch (mres) { - case ERTS_MIGRATE_FAILED_RUNQ_SUSPENDED: - res = 0; - case ERTS_MIGRATE_SUCCESS: - if (vrq_locked) + while (proc) { + erts_aint32_t state = erts_smp_atomic32_read_acqb(&proc->state); + if (!(ERTS_PSFLG_BOUND & state)) { + /* Steal process */ + int prio = (int) (ERTS_PSFLG_PRIO_MASK & state); + ErtsRunQueueInfo *rqi = &vrq->procs.prio_info[prio]; + unqueue_process(vrq, rpq, rqi, prio, prev_proc, proc); erts_smp_runq_unlock(vrq); - return res; - default: /* Other failures */ - break; - } - } + RUNQ_SET_RQ(&proc->run_queue, rq); - ERTS_SMP_LC_CHK_RUNQ_LOCK(rq, *rq_lockedp); - ERTS_SMP_LC_CHK_RUNQ_LOCK(vrq, vrq_locked); + erts_smp_runq_lock(rq); + *rq_lockedp = 1; + enqueue_process(rq, prio, proc); + return !0; + } + prev_proc = proc; + proc = proc->next; + } - if (!vrq_locked) { - if (*rq_lockedp) - erts_smp_xrunq_lock(rq, vrq); - else - erts_smp_runq_lock(vrq); - vrq_locked = 1; + procs_qmask &= ~max_prio_bit; } - try_steal_port: +no_procs: - ERTS_SMP_LC_CHK_RUNQ_LOCK(rq, *rq_lockedp); - ERTS_SMP_LC_CHK_RUNQ_LOCK(vrq, vrq_locked); + ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(vrq)); /* * Check for a runnable port to steal... */ - if (vrq->ports.info.len) { - Port *prt = vrq->ports.end; - int prt_locked = 0; - int res; - ErtsMigrateResult mres; - - mres = erts_port_migrate(prt, &prt_locked, - vrq, &vrq_locked, - rq, rq_lockedp); - if (prt_locked) - erts_smp_port_unlock(prt); - res = !0; - switch (mres) { - case ERTS_MIGRATE_FAILED_RUNQ_SUSPENDED: - res = 0; - case ERTS_MIGRATE_SUCCESS: - if (vrq_locked) - erts_smp_runq_unlock(vrq); - return res; - default: /* Other failures */ - break; + if (vrq->ports.start) { + ErtsRunQueue *prt_rq; + Port *prt = erts_dequeue_port(vrq); + RUNQ_SET_RQ(&prt->run_queue, rq); + erts_smp_runq_unlock(vrq); + + /* + * The port might terminate while + * we have no lock on it... + */ + + prt_rq = erts_port_runq(prt); + if (!prt_rq) + return 0; + else { + if (prt_rq != rq) + erl_exit(ERTS_ABORT_EXIT, + "%s:%d:%s() internal error\n", + __FILE__, __LINE__, __func__); + *rq_lockedp = 1; + erts_enqueue_port(rq, prt); + return !0; } } - if (vrq_locked) - erts_smp_runq_unlock(vrq); + erts_smp_runq_unlock(vrq); return 0; } @@ -2913,9 +3333,10 @@ static ERTS_INLINE int check_possible_steal_victim(ErtsRunQueue *rq, int *rq_lockedp, int vix) { ErtsRunQueue *vrq = ERTS_RUNQ_IX(vix); - erts_aint32_t iflgs = erts_smp_atomic32_read_nob(&vrq->info_flags); - if (iflgs & ERTS_RUNQ_IFLG_NONEMPTY) - return try_steal_task_from_victim(rq, rq_lockedp, vrq); + Uint32 flags = ERTS_RUNQ_FLGS_GET(vrq); + if ((flags & (ERTS_RUNQ_FLG_NONEMPTY + | ERTS_RUNQ_FLG_PROTECTED)) == ERTS_RUNQ_FLG_NONEMPTY) + return try_steal_task_from_victim(rq, rq_lockedp, vrq, flags); else return 0; } @@ -2925,15 +3346,12 @@ static int try_steal_task(ErtsRunQueue *rq) { int res, rq_locked, vix, active_rqs, blnc_rqs; + Uint32 flags; - /* - * We are not allowed to steal jobs to this run queue - * if it is suspended. Note that it might get suspended - * at any time when we don't have the lock on the run - * queue. - */ - if (rq->flags & ERTS_RUNQ_FLG_SUSPENDED) - return 0; + /* Protect jobs we steal from getting stolen from us... */ + flags = ERTS_RUNQ_FLGS_SET(rq, ERTS_RUNQ_FLG_PROTECTED); + if (flags & ERTS_RUNQ_FLG_SUSPENDED) + return 0; /* go suspend instead... */ res = 0; rq_locked = 1; @@ -3052,12 +3470,123 @@ do { \ ASSERT(sum__ == (RQ)->full_reds_history_sum); \ } while (0); +#define ERTS_PRE_ALLOCED_MPATHS 8 + +erts_atomic_t erts_migration_paths; + +static struct { + size_t size; + ErtsMigrationPaths *freelist; + struct { + ErtsMigrationPaths *first; + ErtsMigrationPaths *last; + } retired; +} mpaths; + +static void +init_migration_paths(void) +{ + int qix, i; + char *p; + ErtsMigrationPaths *mps; + + mpaths.size = sizeof(ErtsMigrationPaths); + mpaths.size += sizeof(ErtsMigrationPath)*(erts_no_schedulers-1); + mpaths.size = ERTS_ALC_CACHE_LINE_ALIGN_SIZE(mpaths.size); + + p = erts_alloc_permanent_cache_aligned(ERTS_ALC_T_LL_MPATHS, + (mpaths.size + * ERTS_PRE_ALLOCED_MPATHS)); + mpaths.freelist = NULL; + for (i = 0; i < ERTS_PRE_ALLOCED_MPATHS-1; i++) { + mps = (ErtsMigrationPaths *) p; + mps->next = mpaths.freelist; + mpaths.freelist = mps; + p += mpaths.size; + } + + mps = (ErtsMigrationPaths *) p; + mps->block = NULL; + for (qix = 0; qix < erts_no_run_queues; qix++) { + int pix; + mps->mpath[qix].flags = 0; + mps->mpath[qix].misc_evac_runq = NULL; + for (pix = 0; pix < ERTS_NO_PRIO_LEVELS; pix++) { + mps->mpath[qix].prio[pix].limit.this = -1; + mps->mpath[qix].prio[pix].limit.other = -1; + mps->mpath[qix].prio[pix].runq = NULL; + mps->mpath[qix].prio[pix].flags = 0; + } + } + erts_atomic_init_wb(&erts_migration_paths, (erts_aint_t) mps); +} + +static ERTS_INLINE ErtsMigrationPaths * +alloc_mpaths(void) +{ + void *block; + ErtsMigrationPaths *res; + ERTS_SMP_LC_ASSERT(erts_smp_lc_mtx_is_locked(&balance_info.update_mtx)); + + res = mpaths.freelist; + if (res) { + mpaths.freelist = res->next; + res->block = NULL; + return res; + } + res = erts_alloc(ERTS_ALC_T_SL_MPATHS, + mpaths.size+ERTS_CACHE_LINE_SIZE); + block = (void *) res; + if (((UWord) res) & ERTS_CACHE_LINE_MASK) + res = (ErtsMigrationPaths *) ((((UWord) res) & ~ERTS_CACHE_LINE_MASK) + + ERTS_CACHE_LINE_SIZE); + res->block = block; + return res; +} + +static ERTS_INLINE void +retire_mpaths(ErtsMigrationPaths *mps) +{ + ErtsThrPrgrVal current; + + ERTS_SMP_LC_ASSERT(erts_smp_lc_mtx_is_locked(&balance_info.update_mtx)); + + current = erts_thr_progress_current(); + + while (mpaths.retired.first) { + ErtsMigrationPaths *tmp = mpaths.retired.first; + if (!erts_thr_progress_has_reached_this(current, tmp->thr_prgr)) + break; + mpaths.retired.first = tmp->next; + if (tmp->block) { + erts_free(ERTS_ALC_T_SL_MPATHS, tmp->block); + } + else { + tmp->next = mpaths.freelist; + mpaths.freelist = tmp; + } + } + + if (!mpaths.retired.first) + mpaths.retired.last = NULL; + + mps->thr_prgr = erts_thr_progress_later_than(current); + mps->next = NULL; + + if (mpaths.retired.last) + mpaths.retired.last->next = mps; + else + mpaths.retired.first = mps; + mpaths.retired.last = mps; +} + static void check_balance(ErtsRunQueue *c_rq) { #if ERTS_MAX_PROCESSES >= (1 << 27) # error check_balance() assumes ERTS_MAX_PROCESS < (1 << 27) #endif + ErtsMigrationPaths *new_mpaths, *old_mpaths; ErtsRunQueueBalance avg = {0}; Sint64 scheds_reds, full_scheds_reds; int forced, active, current_active, oowc, half_full_scheds, full_scheds, @@ -3083,9 +3612,9 @@ check_balance(ErtsRunQueue *c_rq) ERTS_FOREACH_RUNQ(rq, { if (rq->waiting) - rq->flags |= ERTS_RUNQ_FLG_HALFTIME_OUT_OF_WORK; + ERTS_RUNQ_FLGS_SET(rq, ERTS_RUNQ_FLG_HALFTIME_OUT_OF_WORK); else - rq->flags &= ~ERTS_RUNQ_FLG_HALFTIME_OUT_OF_WORK; + ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_HALFTIME_OUT_OF_WORK); rq->check_balance_reds = ERTS_RUNQ_CALL_CHECK_BALANCE_REDS; }); @@ -3127,7 +3656,7 @@ check_balance(ErtsRunQueue *c_rq) ErtsRunQueue *rq = ERTS_RUNQ_IX(qix); erts_smp_runq_lock(rq); - run_queue_info[qix].flags = rq->flags; + run_queue_info[qix].flags = ERTS_RUNQ_FLGS_GET_NOB(rq); for (pix = 0; pix < ERTS_NO_PROC_PRIO_LEVELS; pix++) { run_queue_info[qix].prio[pix].max_len = rq->procs.prio_info[pix].max_len; @@ -3461,47 +3990,27 @@ erts_fprintf(stderr, "--------------------------------\n"); set_no_active_runqs(active); balance_info.halftime = 1; - erts_smp_atomic32_set_nob(&balance_info.checking_balance, 0); + new_mpaths = alloc_mpaths(); + + /* Write migration paths */ - /* Write migration paths and reset balance statistics in all queues */ for (qix = 0; qix < blnc_no_rqs; qix++) { int mqix; - Uint32 flags; - ErtsRunQueue *rq = ERTS_RUNQ_IX(qix); - ErtsRunQueueInfo *rqi; - flags = run_queue_info[qix].flags; - erts_smp_runq_lock(rq); - flags |= (rq->flags & ~ERTS_RUNQ_FLGS_MIGRATION_INFO); - ASSERT(!(flags & ERTS_RUNQ_FLG_OUT_OF_WORK)); - if (rq->waiting) - flags |= ERTS_RUNQ_FLG_OUT_OF_WORK; - - rq->full_reds_history_sum - = run_queue_info[qix].full_reds_history_sum; - rq->full_reds_history[freds_hist_ix] - = run_queue_info[qix].full_reds_history_change; + Uint32 flags = run_queue_info[qix].flags; + ErtsMigrationPath *mp = &new_mpaths->mpath[qix]; - ERTS_DBG_CHK_FULL_REDS_HISTORY(rq); + mp->flags = flags; + mp->misc_evac_runq = NULL; - rq->out_of_work_count = 0; - rq->flags = flags; - rq->max_len = rq->len; for (pix = 0; pix < ERTS_NO_PRIO_LEVELS; pix++) { - rqi = (pix == ERTS_PORT_PRIO_LEVEL - ? &rq->ports.info - : &rq->procs.prio_info[pix]); - rqi->max_len = rqi->len; - rqi->reds = 0; if (!(ERTS_CHK_RUNQ_FLG_EMIGRATE(flags, pix) | ERTS_CHK_RUNQ_FLG_IMMIGRATE(flags, pix))) { ASSERT(run_queue_info[qix].prio[pix].immigrate_from < 0); ASSERT(run_queue_info[qix].prio[pix].emigrate_to < 0); -#ifdef DEBUG - rqi->migrate.limit.this = -1; - rqi->migrate.limit.other = -1; - ERTS_DBG_SET_INVALID_RUNQP(rqi->migrate.runq, 0x2); -#endif - + mp->prio[pix].limit.this = -1; + mp->prio[pix].limit.other = -1; + mp->prio[pix].runq = NULL; + mp->prio[pix].flags = 0; } else if (ERTS_CHK_RUNQ_FLG_EMIGRATE(flags, pix)) { ASSERT(!ERTS_CHK_RUNQ_FLG_IMMIGRATE(flags, pix)); @@ -3509,11 +4018,12 @@ erts_fprintf(stderr, "--------------------------------\n"); ASSERT(run_queue_info[qix].prio[pix].emigrate_to >= 0); mqix = run_queue_info[qix].prio[pix].emigrate_to; - rqi->migrate.limit.this + mp->prio[pix].limit.this = run_queue_info[qix].prio[pix].migration_limit; - rqi->migrate.limit.other + mp->prio[pix].limit.other = run_queue_info[mqix].prio[pix].migration_limit; - rqi->migrate.runq = ERTS_RUNQ_IX(mqix); + mp->prio[pix].runq = ERTS_RUNQ_IX(mqix); + mp->prio[pix].flags = run_queue_info[mqix].flags; } else { ASSERT(ERTS_CHK_RUNQ_FLG_IMMIGRATE(flags, pix)); @@ -3521,24 +4031,142 @@ erts_fprintf(stderr, "--------------------------------\n"); ASSERT(run_queue_info[qix].prio[pix].immigrate_from >= 0); mqix = run_queue_info[qix].prio[pix].immigrate_from; - rqi->migrate.limit.this + mp->prio[pix].limit.this = run_queue_info[qix].prio[pix].migration_limit; - rqi->migrate.limit.other + mp->prio[pix].limit.other = run_queue_info[mqix].prio[pix].migration_limit; - rqi->migrate.runq = ERTS_RUNQ_IX(mqix); + mp->prio[pix].runq = ERTS_RUNQ_IX(mqix); + mp->prio[pix].flags = run_queue_info[mqix].flags; } } + } + + old_mpaths = erts_get_migration_paths_managed(); + + /* Keep offline run-queues as is */ + for (qix = blnc_no_rqs; qix < erts_no_schedulers; qix++) { + ErtsMigrationPath *nmp = &new_mpaths->mpath[qix]; + ErtsMigrationPath *omp = &old_mpaths->mpath[qix]; + + nmp->flags = omp->flags; + nmp->misc_evac_runq = omp->misc_evac_runq; + + for (pix = 0; pix < ERTS_NO_PRIO_LEVELS; pix++) { + nmp->prio[pix].limit.this = omp->prio[pix].limit.this; + nmp->prio[pix].limit.other = omp->prio[pix].limit.other; + nmp->prio[pix].runq = omp->prio[pix].runq; + nmp->prio[pix].flags = omp->prio[pix].flags; + } + } + + + /* Publish new migration paths... */ + erts_atomic_set_wb(&erts_migration_paths, (erts_aint_t) new_mpaths); + + /* Reset balance statistics in all online queues */ + for (qix = 0; qix < blnc_no_rqs; qix++) { + Uint32 flags = run_queue_info[qix].flags; + ErtsRunQueue *rq = ERTS_RUNQ_IX(qix); + + erts_smp_runq_lock(rq); + ASSERT(!(flags & ERTS_RUNQ_FLG_OUT_OF_WORK)); + if (rq->waiting) + flags |= ERTS_RUNQ_FLG_OUT_OF_WORK; + + rq->full_reds_history_sum + = run_queue_info[qix].full_reds_history_sum; + rq->full_reds_history[freds_hist_ix] + = run_queue_info[qix].full_reds_history_change; + + ERTS_DBG_CHK_FULL_REDS_HISTORY(rq); + + rq->out_of_work_count = 0; + (void) ERTS_RUNQ_FLGS_MASK_SET(rq, ERTS_RUNQ_FLGS_MIGRATION_INFO, flags); + + rq->max_len = rq->len; + for (pix = 0; pix < ERTS_NO_PRIO_LEVELS; pix++) { + ErtsRunQueueInfo *rqi; + rqi = (pix == ERTS_PORT_PRIO_LEVEL + ? &rq->ports.info + : &rq->procs.prio_info[pix]); + erts_smp_reset_max_len(rq, rqi); + rqi->reds = 0; + } rq->check_balance_reds = ERTS_RUNQ_CALL_CHECK_BALANCE_REDS; erts_smp_runq_unlock(rq); } + erts_smp_atomic32_set_nob(&balance_info.checking_balance, 0); + balance_info.n++; + retire_mpaths(old_mpaths); erts_smp_mtx_unlock(&balance_info.update_mtx); erts_smp_runq_lock(c_rq); } +static void +change_no_used_runqs(int used) +{ + ErtsMigrationPaths *new_mpaths, *old_mpaths; + int active, qix; + erts_smp_mtx_lock(&balance_info.update_mtx); + get_no_runqs(&active, NULL); + set_no_used_runqs(used); + + old_mpaths = erts_get_migration_paths_managed(); + new_mpaths = alloc_mpaths(); + + /* Write migration paths... */ + + for (qix = 0; qix < used; qix++) { + int pix; + ErtsMigrationPath *omp = &old_mpaths->mpath[qix]; + ErtsMigrationPath *nmp = &new_mpaths->mpath[qix]; + + nmp->flags = omp->flags & ~ERTS_RUNQ_FLGS_MIGRATION_QMASKS; + nmp->misc_evac_runq = NULL; + + for (pix = 0; pix < ERTS_NO_PRIO_LEVELS; pix++) { + nmp->prio[pix].limit.this = -1; + nmp->prio[pix].limit.other = -1; + nmp->prio[pix].runq = NULL; + nmp->prio[pix].flags = 0; + } + } + for (qix = used; qix < erts_no_run_queues; qix++) { + int pix; + ErtsRunQueue *to_rq = ERTS_RUNQ_IX(qix % used); + ErtsMigrationPath *nmp = &new_mpaths->mpath[qix]; + + nmp->flags = (ERTS_RUNQ_FLGS_EMIGRATE_QMASK + | ERTS_RUNQ_FLGS_EVACUATE_QMASK); + nmp->misc_evac_runq = to_rq; + for (pix = 0; pix < ERTS_NO_PRIO_LEVELS; pix++) { + nmp->prio[pix].limit.this = -1; + nmp->prio[pix].limit.other = -1; + nmp->prio[pix].runq = to_rq; + nmp->prio[pix].flags = 0; + } + } + + /* ... and publish them. */ + erts_atomic_set_wb(&erts_migration_paths, (erts_aint_t) new_mpaths); + + retire_mpaths(old_mpaths); + + /* Make sure that we balance soon... */ + balance_info.forced_check_balance = 1; + + erts_smp_mtx_unlock(&balance_info.update_mtx); + + erts_smp_runq_lock(ERTS_RUNQ_IX(0)); + ERTS_RUNQ_IX(0)->check_balance_reds = 0; + erts_smp_runq_unlock(ERTS_RUNQ_IX(0)); +} + + #endif /* #ifdef ERTS_SMP */ Uint @@ -3606,11 +4234,11 @@ static struct { int limit; int dec_shift; int dec_mask; - void (*check)(ErtsRunQueue *rq); + void (*check)(ErtsRunQueue *rq, Uint32 flags); } wakeup_other; static void -wakeup_other_check(ErtsRunQueue *rq) +wakeup_other_check(ErtsRunQueue *rq, Uint32 flags) { int wo_reds = rq->wakeup_other_reds; if (wo_reds) { @@ -3628,6 +4256,8 @@ wakeup_other_check(ErtsRunQueue *rq) if (rq->wakeup_other > wakeup_other.limit) { int empty_rqs = erts_smp_atomic32_read_acqb(&no_empty_run_queues); + if (flags & ERTS_RUNQ_FLG_PROTECTED) + ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_PROTECTED); if (empty_rqs != 0) wake_scheduler_on_empty_runq(rq); rq->wakeup_other = 0; @@ -3672,18 +4302,21 @@ wakeup_other_set_limit(void) } static void -wakeup_other_check_legacy(ErtsRunQueue *rq) +wakeup_other_check_legacy(ErtsRunQueue *rq, Uint32 flags) { int wo_reds = rq->wakeup_other_reds; if (wo_reds) { - if (rq->len < 2) { + erts_aint32_t len = rq->len; + if (len < 2) { rq->wakeup_other -= ERTS_WAKEUP_OTHER_DEC_LEGACY*wo_reds; if (rq->wakeup_other < 0) rq->wakeup_other = 0; } else if (rq->wakeup_other < wakeup_other.limit) - rq->wakeup_other += rq->len*wo_reds + ERTS_WAKEUP_OTHER_FIXED_INC_LEGACY; + rq->wakeup_other += len*wo_reds + ERTS_WAKEUP_OTHER_FIXED_INC_LEGACY; else { + if (flags & ERTS_RUNQ_FLG_PROTECTED) + ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_PROTECTED); if (erts_smp_atomic32_read_acqb(&no_empty_run_queues) != 0) { wake_scheduler_on_empty_runq(rq); rq->wakeup_other = 0; @@ -3883,7 +4516,6 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online) ErtsRunQueue *rq = ERTS_RUNQ_IX(ix); rq->ix = ix; - erts_smp_atomic32_init_nob(&rq->info_flags, ERTS_RUNQ_IFLG_NONEMPTY); /* make sure that the "extra" id correponds to the schedulers * id if the esdp->no <-> ix+1 mapping change. @@ -3894,7 +4526,7 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online) rq->waiting = 0; rq->woken = 0; - rq->flags = 0; + ERTS_RUNQ_FLGS_INIT(rq, ERTS_RUNQ_FLG_NONEMPTY); rq->check_balance_reds = ERTS_RUNQ_CALL_CHECK_BALANCE_REDS; rq->full_reds_history_sum = 0; for (rix = 0; rix < ERTS_FULL_REDS_HISTORY_SIZE; rix++) { @@ -3908,19 +4540,14 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online) rq->wakeup_other_reds = 0; rq->halt_in_progress = 0; - rq->procs.len = 0; rq->procs.pending_exiters = NULL; rq->procs.context_switches = 0; rq->procs.reductions = 0; for (pix = 0; pix < ERTS_NO_PROC_PRIO_LEVELS; pix++) { - rq->procs.prio_info[pix].len = 0; + erts_smp_atomic32_init_nob(&rq->procs.prio_info[pix].len, 0); rq->procs.prio_info[pix].max_len = 0; rq->procs.prio_info[pix].reds = 0; - rq->procs.prio_info[pix].migrate.limit.this = 0; - rq->procs.prio_info[pix].migrate.limit.other = 0; - ERTS_DBG_SET_INVALID_RUNQP(rq->procs.prio_info[pix].migrate.runq, - 0x0); if (pix < ERTS_NO_PROC_PRIO_LEVELS - 1) { rq->procs.prio[pix].first = NULL; rq->procs.prio[pix].last = NULL; @@ -3929,14 +4556,10 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online) rq->misc.start = NULL; rq->misc.end = NULL; - rq->misc.evac_runq = NULL; - rq->ports.info.len = 0; + erts_smp_atomic32_init_nob(&rq->ports.info.len, 0); rq->ports.info.max_len = 0; rq->ports.info.reds = 0; - rq->ports.info.migrate.limit.this = 0; - rq->ports.info.migrate.limit.other = 0; - rq->ports.info.migrate.runq = NULL; rq->ports.start = NULL; rq->ports.end = NULL; } @@ -4059,10 +4682,12 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online) balance_info.prev_rise.reds = 0; balance_info.n = 0; + init_migration_paths(); + if (no_schedulers_online < no_schedulers) { + change_no_used_runqs(no_schedulers_online); for (ix = no_schedulers_online; ix < erts_no_run_queues; ix++) - evacuate_run_queue(ERTS_RUNQ_IX(ix), - ERTS_RUNQ_IX(ix % no_schedulers_online)); + suspend_run_queue(ERTS_RUNQ_IX(ix)); } schdlr_sspnd.wait_curr_online = no_schedulers_online; @@ -4125,91 +4750,208 @@ erts_get_scheduler_data(void) #endif -static int remove_proc_from_runq(ErtsRunQueue *rq, Process *p, int to_inactive); +/* + * scheduler_out_process() return with c_rq locked. + */ +static ERTS_INLINE int +schedule_out_process(ErtsRunQueue *c_rq, erts_aint32_t state, Process *p) +{ + erts_aint32_t a, e, n; + int res = 0; + + a = state; + + while (1) { + n = e = a; + + ASSERT(a & ERTS_PSFLG_RUNNING); + ASSERT(!(a & ERTS_PSFLG_IN_RUNQ)); + + n &= ~ERTS_PSFLG_RUNNING; + if ((a & (ERTS_PSFLG_ACTIVE|ERTS_PSFLG_SUSPENDED)) == ERTS_PSFLG_ACTIVE) + n |= ERTS_PSFLG_IN_RUNQ; + a = erts_smp_atomic32_cmpxchg_mb(&p->state, n, e); + if (a == e) + break; + } + + if (!(n & ERTS_PSFLG_IN_RUNQ)) { + if (erts_system_profile_flags.runnable_procs) + profile_runnable_proc(p, am_inactive); + } + else { + int prio = (int) (ERTS_PSFLG_PRIO_MASK & n); + ErtsRunQueue *runq = erts_get_runq_proc(p); + + ASSERT(!(n & ERTS_PSFLG_SUSPENDED)); + +#ifdef ERTS_SMP + if (!(ERTS_PSFLG_BOUND & n)) { + ErtsRunQueue *new_runq = erts_check_emigration_need(runq, prio); + if (new_runq) { + RUNQ_SET_RQ(&p->run_queue, new_runq); + runq = new_runq; + } + } +#endif + ASSERT(runq); + res = 1; + + erts_smp_runq_lock(runq); + + /* Enqueue the process */ + enqueue_process(runq, prio, p); + + if (runq == c_rq) + return res; + erts_smp_runq_unlock(runq); + smp_notify_inc_runq(runq); + } + erts_smp_runq_lock(c_rq); + return res; +} static ERTS_INLINE void -suspend_process(ErtsRunQueue *rq, Process *p) +add2runq(Process *p, erts_aint32_t state) { - ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p)); - ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); - p->rcount++; /* count number of suspend */ -#ifdef ERTS_SMP - ASSERT(!(p->runq_flags & ERTS_PROC_RUNQ_FLG_RUNNING) - || p == erts_get_current_process()); - ASSERT(p->status != P_RUNNING - || p->runq_flags & ERTS_PROC_RUNQ_FLG_RUNNING); - if (p->status_flags & ERTS_PROC_SFLG_PENDADD2SCHEDQ) - goto runable; -#endif - switch(p->status) { - case P_SUSPENDED: - break; - case P_RUNABLE: + int prio = (int) (ERTS_PSFLG_PRIO_MASK & state); + ErtsRunQueue *runq = erts_get_runq_proc(p); + #ifdef ERTS_SMP - runable: - if (!ERTS_PROC_PENDING_EXIT(p)) + if (!(ERTS_PSFLG_BOUND & state)) { + ErtsRunQueue *new_runq = erts_check_emigration_need(runq, prio); + if (new_runq) { + RUNQ_SET_RQ(&p->run_queue, new_runq); + runq = new_runq; + } + } #endif - remove_proc_from_runq(rq, p, 1); - /* else: - * leave process in schedq so it will discover the pending exit - */ - p->rstatus = P_RUNABLE; /* wakeup as runnable */ - break; - case P_RUNNING: - p->rstatus = P_RUNABLE; /* wakeup as runnable */ - break; - case P_WAITING: - p->rstatus = P_WAITING; /* wakeup as waiting */ - break; - case P_EXITING: - return; /* ignore this */ - case P_GARBING: - case P_FREE: - erl_exit(1, "bad state in suspend_process()\n"); + ASSERT(runq); + + erts_smp_runq_lock(runq); + + /* Enqueue the process */ + enqueue_process(runq, prio, p); + + erts_smp_runq_unlock(runq); + smp_notify_inc_runq(runq); + +} + +static ERTS_INLINE void +schedule_process(Process *p, erts_aint32_t state, int active_enq) +{ + erts_aint32_t a = state, n; + + while (1) { + erts_aint32_t e; + n = e = a; + ASSERT(!(a & ERTS_PSFLG_FREE)); + n |= ERTS_PSFLG_ACTIVE; + if (!(a & (ERTS_PSFLG_SUSPENDED|ERTS_PSFLG_RUNNING))) + n |= ERTS_PSFLG_IN_RUNQ; + a = erts_smp_atomic32_cmpxchg_mb(&p->state, n, e); + if (a == e) + break; + if (!active_enq && (a & ERTS_PSFLG_ACTIVE)) + return; /* Someone else activated process ... */ + } + +#ifdef RRR_DEBUG + if (active_enq) + erts_fprintf(stderr, "! state=0x%x\n", n); +#endif + + if (erts_system_profile_flags.runnable_procs + && !(a & (ERTS_PSFLG_ACTIVE|ERTS_PSFLG_SUSPENDED))) { + profile_runnable_proc(p, am_active); } - if ((erts_system_profile_flags.runnable_procs) && (p->rcount == 1) && (p->status != P_WAITING)) { - profile_runnable_proc(p, am_inactive); + if ((n & ERTS_PSFLG_IN_RUNQ) && !(a & ERTS_PSFLG_IN_RUNQ)) { +#ifdef RRR_DEBUG + if (active_enq) + erts_fprintf(stderr, "-->\n"); +#endif + add2runq(p, n); } +} - p->status = P_SUSPENDED; - +void +erts_schedule_process(Process *p, erts_aint32_t state) +{ + schedule_process(p, state, 0); } -static ERTS_INLINE void -resume_process(Process *p) +static ERTS_INLINE int +suspend_process(Process *c_p, Process *p) { - Uint32 *statusp; + erts_aint32_t state = erts_smp_atomic32_read_acqb(&p->state); + int suspended = 0; ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p)); - switch (p->status) { - case P_SUSPENDED: - statusp = &p->status; - break; - case P_GARBING: - if (p->gcstatus == P_SUSPENDED) { - statusp = &p->gcstatus; - break; + + if ((state & ERTS_PSFLG_SUSPENDED)) + suspended = -1; + else { + if (c_p == p) { + state = erts_smp_atomic32_read_bor_relb(&p->state, + ERTS_PSFLG_SUSPENDED); + state |= ERTS_PSFLG_SUSPENDED; + ASSERT(state & ERTS_PSFLG_RUNNING); + suspended = 1; } - /* Fall through */ - default: - return; + else { + while (!(state & (ERTS_PSFLG_RUNNING|ERTS_PSFLG_EXITING))) { + erts_aint32_t e, n; + n = e = state; + n |= ERTS_PSFLG_SUSPENDED; + state = erts_smp_atomic32_cmpxchg_relb(&p->state, n, e); + if (state == e) { + state = n; + suspended = 1; + break; + } + } + } + } + + if (state & ERTS_PSFLG_SUSPENDED) { + + ASSERT(!(ERTS_PSFLG_RUNNING & state) + || p == erts_get_current_process()); + + if (erts_system_profile_flags.runnable_procs + && (p->rcount == 0) + && (state & ERTS_PSFLG_ACTIVE)) { + profile_runnable_proc(p, am_inactive); + } + + p->rcount++; /* count number of suspend */ } + return suspended; +} + +static ERTS_INLINE void +resume_process(Process *p) +{ + erts_aint32_t state; + ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p)); ASSERT(p->rcount > 0); if (--p->rcount > 0) /* multiple suspend */ return; - switch(p->rstatus) { - case P_RUNABLE: - erts_add_to_runq(p); - break; - case P_WAITING: - *statusp = P_WAITING; - break; - default: - erl_exit(1, "bad state in resume_process()\n"); + + state = erts_smp_atomic32_read_band_mb(&p->state, ~ERTS_PSFLG_SUSPENDED); + state &= ~ERTS_PSFLG_SUSPENDED; +#ifdef RRR_DEBUG + erts_fprintf(stderr, "%T - state=0x%x\n", p->id, state); +#endif + if ((state & (ERTS_PSFLG_EXITING + | ERTS_PSFLG_ACTIVE + | ERTS_PSFLG_IN_RUNQ + | ERTS_PSFLG_RUNNING)) == ERTS_PSFLG_ACTIVE) { + schedule_process(p, state, 1); } - p->rstatus = P_FREE; } int @@ -4333,6 +5075,7 @@ suspend_scheduler(ErtsSchedulerData *esdp) int wake = 0; erts_aint32_t aux_work; int thr_prgr_active = 1; + ErtsStuckBoundProcesses sbp = {NULL, NULL}; /* * Schedulers may be suspended in two different ways: @@ -4347,6 +5090,8 @@ suspend_scheduler(ErtsSchedulerData *esdp) ASSERT(no != 1); + evacuate_run_queue(esdp->run_queue, &sbp); + erts_smp_runq_unlock(esdp->run_queue); erts_sched_check_cpu_bind_prep_suspend(esdp); @@ -4410,17 +5155,26 @@ suspend_scheduler(ErtsSchedulerData *esdp) erts_smp_mtx_unlock(&schdlr_sspnd.mtx); while (1) { + erts_aint32_t qmask; erts_aint32_t flgs; + qmask = (ERTS_RUNQ_FLGS_GET(esdp->run_queue) + & ERTS_RUNQ_FLGS_QMASK); aux_work = erts_atomic32_read_acqb(&ssi->aux_work); - if (aux_work) { + if (aux_work|qmask) { if (!thr_prgr_active) { erts_thr_progress_active(esdp, thr_prgr_active = 1); sched_wall_time_change(esdp, 1); } - aux_work = handle_aux_work(&esdp->aux_work_data, aux_work); + if (aux_work) + aux_work = handle_aux_work(&esdp->aux_work_data, aux_work); if (aux_work && erts_thr_progress_update(esdp)) erts_thr_progress_leader_update(esdp); + if (qmask) { + erts_smp_runq_lock(esdp->run_queue); + evacuate_run_queue(esdp->run_queue, &sbp); + erts_smp_runq_unlock(esdp->run_queue); + } } if (!aux_work) { @@ -4490,56 +5244,11 @@ suspend_scheduler(ErtsSchedulerData *esdp) erts_smp_runq_lock(esdp->run_queue); non_empty_runq(esdp->run_queue); + schedule_bound_processes(esdp->run_queue, &sbp); + erts_sched_check_cpu_bind_post_suspend(esdp); } -#define ERTS_RUNQ_RESET_SUSPEND_INFO(RQ, DBG_ID) \ -do { \ - int pix__; \ - (RQ)->misc.evac_runq = NULL; \ - (RQ)->ports.info.migrate.runq = NULL; \ - (RQ)->flags &= ~(ERTS_RUNQ_FLGS_IMMIGRATE_QMASK \ - | ERTS_RUNQ_FLGS_EMIGRATE_QMASK \ - | ERTS_RUNQ_FLGS_EVACUATE_QMASK \ - | ERTS_RUNQ_FLG_SUSPENDED); \ - (RQ)->flags |= (ERTS_RUNQ_FLG_OUT_OF_WORK \ - | ERTS_RUNQ_FLG_HALFTIME_OUT_OF_WORK); \ - (RQ)->check_balance_reds = ERTS_RUNQ_CALL_CHECK_BALANCE_REDS; \ - erts_smp_atomic32_read_band_nob(&(RQ)->info_flags, ~ERTS_RUNQ_IFLG_SUSPENDED);\ - for (pix__ = 0; pix__ < ERTS_NO_PROC_PRIO_LEVELS; pix__++) { \ - (RQ)->procs.prio_info[pix__].max_len = 0; \ - (RQ)->procs.prio_info[pix__].reds = 0; \ - ERTS_DBG_SET_INVALID_RUNQP((RQ)->procs.prio_info[pix__].migrate.runq,\ - (DBG_ID)); \ - } \ - (RQ)->ports.info.max_len = 0; \ - (RQ)->ports.info.reds = 0; \ -} while (0) - -#define ERTS_RUNQ_RESET_MIGRATION_PATHS__(RQ) \ -do { \ - ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked((RQ))); \ - (RQ)->misc.evac_runq = NULL; \ - (RQ)->ports.info.migrate.runq = NULL; \ - (RQ)->flags &= ~(ERTS_RUNQ_FLGS_IMMIGRATE_QMASK \ - | ERTS_RUNQ_FLGS_EMIGRATE_QMASK \ - | ERTS_RUNQ_FLGS_EVACUATE_QMASK); \ -} while (0) - -#ifdef DEBUG -#define ERTS_RUNQ_RESET_MIGRATION_PATHS(RQ, DBG_ID) \ -do { \ - int pix__; \ - ERTS_RUNQ_RESET_MIGRATION_PATHS__((RQ)); \ - for (pix__ = 0; pix__ < ERTS_NO_PROC_PRIO_LEVELS; pix__++) \ - ERTS_DBG_SET_INVALID_RUNQP((RQ)->procs.prio_info[pix__].migrate.runq,\ - (DBG_ID)); \ -} while (0) -#else -#define ERTS_RUNQ_RESET_MIGRATION_PATHS(RQ, DBG_ID) \ - ERTS_RUNQ_RESET_MIGRATION_PATHS__((RQ)) -#endif - ErtsSchedSuspendResult erts_schedulers_state(Uint *total, Uint *online, @@ -4609,27 +5318,13 @@ erts_set_schedulers_online(Process *p, have_unlocked_plocks = 1; erts_smp_proc_unlock(p, plocks); } - erts_smp_mtx_unlock(&schdlr_sspnd.mtx); - erts_smp_mtx_lock(&balance_info.update_mtx); - for (ix = online; ix < no; ix++) { - ErtsRunQueue *rq = ERTS_RUNQ_IX(ix); - erts_smp_runq_lock(rq); - ERTS_RUNQ_RESET_SUSPEND_INFO(rq, 0x5); - erts_smp_runq_unlock(rq); - scheduler_ix_resume_wake(ix); - } - /* - * Spread evacuation paths among all online - * run queues. - */ - for (ix = no; ix < erts_no_run_queues; ix++) { - ErtsRunQueue *from_rq = ERTS_RUNQ_IX(ix); - ErtsRunQueue *to_rq = ERTS_RUNQ_IX(ix % no); - evacuate_run_queue(from_rq, to_rq); - } - set_no_used_runqs(no); - erts_smp_mtx_unlock(&balance_info.update_mtx); - erts_smp_mtx_lock(&schdlr_sspnd.mtx); + change_no_used_runqs(no); + + for (ix = online; ix < no; ix++) + resume_run_queue(ERTS_RUNQ_IX(ix)); + + for (ix = no; ix < erts_no_run_queues; ix++) + suspend_run_queue(ERTS_RUNQ_IX(ix)); } res = ERTS_SCHDLR_SSPND_DONE; } @@ -4656,25 +5351,11 @@ erts_set_schedulers_online(Process *p, have_unlocked_plocks = 1; erts_smp_proc_unlock(p, plocks); } - erts_smp_mtx_unlock(&schdlr_sspnd.mtx); - erts_smp_mtx_lock(&balance_info.update_mtx); - - for (ix = 0; ix < online; ix++) { - ErtsRunQueue *rq = ERTS_RUNQ_IX(ix); - erts_smp_runq_lock(rq); - ERTS_RUNQ_RESET_MIGRATION_PATHS(rq, 0x6); - erts_smp_runq_unlock(rq); - } - /* - * Evacutation order important! Newly suspended run queues - * has to be evacuated last. - */ - for (ix = erts_no_run_queues-1; ix >= no; ix--) - evacuate_run_queue(ERTS_RUNQ_IX(ix), - ERTS_RUNQ_IX(ix % no)); - set_no_used_runqs(no); - erts_smp_mtx_unlock(&balance_info.update_mtx); - erts_smp_mtx_lock(&schdlr_sspnd.mtx); + + change_no_used_runqs(no); + for (ix = no; ix < erts_no_run_queues; ix++) + suspend_run_queue(ERTS_RUNQ_IX(ix)); + for (ix = no; ix < online; ix++) { ErtsRunQueue *rq = ERTS_RUNQ_IX(ix); wake_scheduler(rq, 0); @@ -4771,25 +5452,14 @@ erts_block_multi_scheduling(Process *p, ErtsProcLocks plocks, int on, int all) schdlr_sspnd.msb.wait_active = 2; } - erts_smp_mtx_unlock(&schdlr_sspnd.mtx); - erts_smp_mtx_lock(&balance_info.update_mtx); - set_no_used_runqs(1); - for (ix = 0; ix < online; ix++) { + change_no_used_runqs(1); + for (ix = 1; ix < erts_no_run_queues; ix++) + suspend_run_queue(ERTS_RUNQ_IX(ix)); + + for (ix = 1; ix < online; ix++) { ErtsRunQueue *rq = ERTS_RUNQ_IX(ix); - erts_smp_runq_lock(rq); - ASSERT(!(rq->flags & ERTS_RUNQ_FLG_SUSPENDED)); - ERTS_RUNQ_RESET_MIGRATION_PATHS(rq, 0x7); - erts_smp_runq_unlock(rq); + wake_scheduler(rq, 0); } - /* - * Evacuate all activities in all other run queues - * into the first run queue. Note order is important, - * online run queues has to be evacuated last. - */ - for (ix = erts_no_run_queues-1; ix >= 1; ix--) - evacuate_run_queue(ERTS_RUNQ_IX(ix), ERTS_RUNQ_IX(0)); - erts_smp_mtx_unlock(&balance_info.update_mtx); - erts_smp_mtx_lock(&schdlr_sspnd.mtx); if (erts_smp_atomic32_read_nob(&schdlr_sspnd.active) != schdlr_sspnd.msb.wait_active) { @@ -4833,15 +5503,6 @@ erts_block_multi_scheduling(Process *p, ErtsProcLocks plocks, int on, int all) plp = proclist_create(p); plp->next = schdlr_sspnd.msb.procs; schdlr_sspnd.msb.procs = plp; -#ifdef DEBUG - ERTS_FOREACH_RUNQ(srq, - { - if (srq != ERTS_RUNQ_IX(0)) { - ASSERT(ERTS_EMPTY_RUNQ(srq)); - ASSERT(srq->flags & ERTS_RUNQ_FLG_SUSPENDED); - } - }); -#endif ASSERT(p->scheduler_data); } } @@ -4873,27 +5534,6 @@ erts_block_multi_scheduling(Process *p, ErtsProcLocks plocks, int on, int all) res = ERTS_SCHDLR_SSPND_DONE_MSCHED_BLOCKED; else { ERTS_SCHDLR_SSPND_CHNG_SET(ERTS_SCHDLR_SSPND_CHNG_MSB, 0); -#ifdef DEBUG - ERTS_FOREACH_RUNQ(rq, - { - if (rq != p->scheduler_data->run_queue) { - if (!ERTS_EMPTY_RUNQ(rq)) { - Process *rp; - int pix; - ASSERT(rq->ports.info.len == 0); - for (pix = 0; pix < ERTS_NO_PROC_PRIO_LEVELS; pix++) { - for (rp = rq->procs.prio[pix].first; - rp; - rp = rp->next) { - ASSERT(rp->bound_runq); - } - } - } - - ASSERT(rq->flags & ERTS_RUNQ_FLG_SUSPENDED); - } - }); -#endif p->flags &= ~F_HAVE_BLCKD_MSCHED; schdlr_sspnd.msb.ongoing = 0; if (schdlr_sspnd.online == 1) { @@ -4903,35 +5543,19 @@ erts_block_multi_scheduling(Process *p, ErtsProcLocks plocks, int on, int all) } else { int online = schdlr_sspnd.online; - erts_smp_mtx_unlock(&schdlr_sspnd.mtx); if (plocks) { have_unlocked_plocks = 1; erts_smp_proc_unlock(p, plocks); } - erts_smp_mtx_lock(&balance_info.update_mtx); + + change_no_used_runqs(online); /* Resume all online run queues */ - for (ix = 1; ix < online; ix++) { - ErtsRunQueue *rq = ERTS_RUNQ_IX(ix); - erts_smp_runq_lock(rq); - ERTS_RUNQ_RESET_SUSPEND_INFO(rq, 0x4); - erts_smp_runq_unlock(rq); - scheduler_ix_resume_wake(ix); - } + for (ix = 1; ix < online; ix++) + resume_run_queue(ERTS_RUNQ_IX(ix)); - /* Spread evacuation paths among all online run queues */ for (ix = online; ix < erts_no_run_queues; ix++) - evacuate_run_queue(ERTS_RUNQ_IX(ix), - ERTS_RUNQ_IX(ix % online)); - - set_no_used_runqs(online); - /* Make sure that we balance soon... */ - balance_info.forced_check_balance = 1; - erts_smp_runq_lock(ERTS_RUNQ_IX(0)); - ERTS_RUNQ_IX(0)->check_balance_reds = 0; - erts_smp_runq_unlock(ERTS_RUNQ_IX(0)); - erts_smp_mtx_unlock(&balance_info.update_mtx); - erts_smp_mtx_lock(&schdlr_sspnd.mtx); + suspend_run_queue(ERTS_RUNQ_IX(ix)); } res = ERTS_SCHDLR_SSPND_DONE; } @@ -5238,10 +5862,7 @@ handle_pend_sync_suspend(Process *suspendee, if (suspender) { ASSERT(is_nil(suspender->suspendee)); if (suspendee_alive) { - ErtsRunQueue *rq = erts_get_runq_proc(suspendee); - erts_smp_runq_lock(rq); - suspend_process(rq, suspendee); - erts_smp_runq_unlock(rq); + erts_suspend(suspendee, suspendee_locks, NULL); suspender->suspendee = suspendee->id; } /* suspender is suspended waiting for suspendee to suspend; @@ -5284,10 +5905,9 @@ pid2proc_not_running(Process *c_p, ErtsProcLocks c_p_locks, resume_process(rp); } else { - ErtsRunQueue *cp_rq, *rp_rq; rp = erts_pid2proc(c_p, c_p_locks|ERTS_PROC_LOCK_STATUS, - pid, ERTS_PROC_LOCK_STATUS); + pid, pid_locks|ERTS_PROC_LOCK_STATUS); if (!rp) { c_p->flags &= ~F_P2PNR_RESCHED; @@ -5296,58 +5916,36 @@ pid2proc_not_running(Process *c_p, ErtsProcLocks c_p_locks, ASSERT(!(c_p->flags & F_P2PNR_RESCHED)); - cp_rq = erts_get_runq_proc(c_p); - rp_rq = erts_get_runq_proc(rp); - erts_smp_runqs_lock(cp_rq, rp_rq); - if (rp->runq_flags & ERTS_PROC_RUNQ_FLG_RUNNING) { - running: - /* Phiu... */ - - /* - * If we got pending suspenders and suspend ourselves waiting - * to suspend another process we might deadlock. - * In this case we have to yield, be suspended by - * someone else and then do it all over again. - */ - if (!c_p->pending_suspenders) { - /* Mark rp pending for suspend by c_p */ - add_pend_suspend(rp, c_p->id, handle_pend_sync_suspend); - ASSERT(is_nil(c_p->suspendee)); - - /* Suspend c_p; when rp is suspended c_p will be resumed. */ - suspend_process(cp_rq, c_p); - c_p->flags |= F_P2PNR_RESCHED; - } - /* Yield (caller is assumed to yield immediately in bif). */ - erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_STATUS); - rp = ERTS_PROC_LOCK_BUSY; + if (suspend) { + if (suspend_process(c_p, rp)) + goto done; } else { - ErtsProcLocks need_locks = pid_locks & ~ERTS_PROC_LOCK_STATUS; - if (need_locks && erts_smp_proc_trylock(rp, need_locks) == EBUSY) { - erts_smp_runqs_unlock(cp_rq, rp_rq); - erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_STATUS); - rp = erts_pid2proc(c_p, c_p_locks|ERTS_PROC_LOCK_STATUS, - pid, pid_locks|ERTS_PROC_LOCK_STATUS); - if (!rp) - goto done; - /* run-queues may have changed */ - cp_rq = erts_get_runq_proc(c_p); - rp_rq = erts_get_runq_proc(rp); - erts_smp_runqs_lock(cp_rq, rp_rq); - if (rp->runq_flags & ERTS_PROC_RUNQ_FLG_RUNNING) { - /* Ahh... */ - erts_smp_proc_unlock(rp, - pid_locks & ~ERTS_PROC_LOCK_STATUS); - goto running; - } - } + if (!(ERTS_PSFLG_RUNNING & erts_smp_atomic32_read_acqb(&rp->state))) + goto done; + + } + + /* Other process running */ - /* rp is not running and we got the locks we want... */ - if (suspend) - suspend_process(rp_rq, rp); + /* + * If we got pending suspenders and suspend ourselves waiting + * to suspend another process we might deadlock. + * In this case we have to yield, be suspended by + * someone else and then do it all over again. + */ + if (!c_p->pending_suspenders) { + /* Mark rp pending for suspend by c_p */ + add_pend_suspend(rp, c_p->id, handle_pend_sync_suspend); + ASSERT(is_nil(c_p->suspendee)); + + /* Suspend c_p; when rp is suspended c_p will be resumed. */ + suspend_process(c_p, c_p); + c_p->flags |= F_P2PNR_RESCHED; } - erts_smp_runqs_unlock(cp_rq, rp_rq); + /* Yield (caller is assumed to yield immediately in bif). */ + erts_smp_proc_unlock(rp, pid_locks|ERTS_PROC_LOCK_STATUS); + rp = ERTS_PROC_LOCK_BUSY; } done: @@ -5404,36 +6002,26 @@ erts_pid2proc_nropt(Process *c_p, ErtsProcLocks c_p_locks, return erts_pid2proc_not_running(c_p, c_p_locks, pid, pid_locks); } -static ERTS_INLINE void -do_bif_suspend_process(ErtsSuspendMonitor *smon, - Process *suspendee, - ErtsRunQueue *locked_runq) +static ERTS_INLINE int +do_bif_suspend_process(Process *c_p, + ErtsSuspendMonitor *smon, + Process *suspendee) { ASSERT(suspendee); - ASSERT(!suspendee->is_exiting); + ASSERT(!ERTS_PROC_IS_EXITING(suspendee)); ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(suspendee)); if (smon) { if (!smon->active) { - ErtsRunQueue *rq; - - if (locked_runq) - rq = locked_runq; - else { - rq = erts_get_runq_proc(suspendee); - erts_smp_runq_lock(rq); - } - - suspend_process(rq, suspendee); - - if (!locked_runq) - erts_smp_runq_unlock(rq); + if (!suspend_process(c_p, suspendee)) + return 0; } smon->active += smon->pending; ASSERT(smon->active); smon->pending = 0; + return 1; } - + return 0; } static void @@ -5456,10 +6044,17 @@ handle_pend_bif_sync_suspend(Process *suspendee, erts_delete_suspend_monitor(&suspender->suspend_monitors, suspendee->id); else { +#ifdef DEBUG + int res; +#endif ErtsSuspendMonitor *smon; smon = erts_lookup_suspend_monitor(suspender->suspend_monitors, suspendee->id); - do_bif_suspend_process(smon, suspendee, NULL); +#ifdef DEBUG + res = +#endif + do_bif_suspend_process(suspendee, smon, suspendee); + ASSERT(!smon || res != 0); suspender->suspendee = suspendee->id; } /* suspender is suspended waiting for suspendee to suspend; @@ -5491,10 +6086,17 @@ handle_pend_bif_async_suspend(Process *suspendee, erts_delete_suspend_monitor(&suspender->suspend_monitors, suspendee->id); else { +#ifdef DEBUG + int res; +#endif ErtsSuspendMonitor *smon; smon = erts_lookup_suspend_monitor(suspender->suspend_monitors, suspendee->id); - do_bif_suspend_process(smon, suspendee, NULL); +#ifdef DEBUG + res = +#endif + do_bif_suspend_process(suspendee, smon, suspendee); + ASSERT(!smon || res != 0); } erts_smp_proc_unlock(suspender, ERTS_PROC_LOCK_LINK); } @@ -5579,7 +6181,8 @@ suspend_process_2(BIF_ALIST_2) /* This is really a piece of cake without SMP support... */ if (!smon->active) { - suspend_process(ERTS_RUNQ_IX(0), suspendee); + erts_smp_atomic32_read_bor_nob(&suspendee->state, ERTS_PSFLG_SUSPENDED); + suspend_process(BIF_P, suspendee); smon->active++; res = am_true; } @@ -5622,21 +6225,15 @@ suspend_process_2(BIF_ALIST_2) if (smon->pending && unless_suspending) res = am_false; else { - ErtsRunQueue *rq; if (smon->pending == INT_MAX) goto system_limit; smon->pending++; - rq = erts_get_runq_proc(suspendee); - erts_smp_runq_lock(rq); - if (suspendee->runq_flags & ERTS_PROC_RUNQ_FLG_RUNNING) + if (!do_bif_suspend_process(BIF_P, smon, suspendee)) add_pend_suspend(suspendee, BIF_P->id, handle_pend_bif_async_suspend); - else - do_bif_suspend_process(smon, suspendee, rq); - erts_smp_runq_unlock(rq); res = am_true; } @@ -5673,7 +6270,6 @@ suspend_process_2(BIF_ALIST_2) /* done */ } else { - ErtsRunQueue *cp_rq, *s_rq; /* We haven't got any active suspends on the suspendee */ /* @@ -5690,12 +6286,7 @@ suspend_process_2(BIF_ALIST_2) if (!unless_suspending || smon->pending == 0) smon->pending++; - cp_rq = erts_get_runq_proc(BIF_P); - s_rq = erts_get_runq_proc(suspendee); - erts_smp_runqs_lock(cp_rq, s_rq); - if (!(suspendee->runq_flags & ERTS_PROC_RUNQ_FLG_RUNNING)) { - do_bif_suspend_process(smon, suspendee, s_rq); - erts_smp_runqs_unlock(cp_rq, s_rq); + if (do_bif_suspend_process(BIF_P, smon, suspendee)) { res = (!unless_suspending || smon->active == 1 ? am_true : am_false); @@ -5715,8 +6306,7 @@ suspend_process_2(BIF_ALIST_2) * This time with BIF_P->suspendee == BIF_ARG_1 (see * above). */ - suspend_process(cp_rq, BIF_P); - erts_smp_runqs_unlock(cp_rq, s_rq); + suspend_process(BIF_P, BIF_P); goto yield; } } @@ -5724,9 +6314,15 @@ suspend_process_2(BIF_ALIST_2) } #endif /* ERTS_SMP */ - - ASSERT(suspendee->status == P_SUSPENDED || (asynchronous && smon->pending)); - ASSERT(suspendee->status == P_SUSPENDED || !smon->active); +#ifdef DEBUG + { + erts_aint32_t state = erts_smp_atomic32_read_acqb(&suspendee->state); + ASSERT((state & ERTS_PSFLG_SUSPENDED) + || (asynchronous && smon->pending)); + ASSERT((state & ERTS_PSFLG_SUSPENDED) + || !smon->active); + } +#endif erts_smp_proc_unlock(suspendee, ERTS_PROC_LOCK_STATUS); erts_smp_proc_unlock(BIF_P, xlocks); @@ -5821,9 +6417,8 @@ resume_process_1(BIF_ALIST_1) if (!suspendee) goto no_suspendee; - ASSERT(suspendee->status == P_SUSPENDED - || (suspendee->status == P_GARBING - && suspendee->gcstatus == P_SUSPENDED)); + ASSERT(ERTS_PSFLG_SUSPENDED + & erts_smp_atomic32_read_nob(&suspendee->state)); resume_process(suspendee); erts_smp_proc_unlock(suspendee, ERTS_PROC_LOCK_STATUS); @@ -5852,449 +6447,46 @@ erts_run_queues_len(Uint *qlen) Uint len = 0; ERTS_ATOMIC_FOREACH_RUNQ(rq, { - if (qlen) - qlen[i++] = rq->procs.len; - len += rq->procs.len; + Sint pqlen = 0; + int pix; + for (pix = 0; pix < ERTS_NO_PROC_PRIO_LEVELS; pix++) + pqlen += RUNQ_READ_LEN(&rq->procs.prio_info[pix].len); + + if (pqlen < 0) + pqlen = 0; + if (qlen) + qlen[i++] = pqlen; + len += pqlen; } ); return len; } -#ifdef HARDDEBUG_RUNQS -static void -check_procs_runq(ErtsRunQueue *runq, Process *p_in_q, Process *p_not_in_q) -{ - int len[ERTS_NO_PROC_PRIO_LEVELS] = {0}; - int tot_len; - int prioq, prio; - int found_p_in_q; - Process *p, *prevp; - - found_p_in_q = 0; - for (prioq = 0; prioq < ERTS_NO_PROC_PRIO_LEVELS - 1; prioq++) { - prevp = NULL; - for (p = runq->procs.prio[prioq].first; p; p = p->next) { - ASSERT(p != p_not_in_q); - if (p == p_in_q) - found_p_in_q = 1; - switch (p->prio) { - case PRIORITY_MAX: - case PRIORITY_HIGH: - case PRIORITY_NORMAL: - ASSERT(prioq == p->prio); - break; - case PRIORITY_LOW: - ASSERT(prioq == PRIORITY_NORMAL); - break; - default: - ASSERT(!"Bad prio on process"); - } - len[p->prio]++; - ASSERT(prevp == p->prev); - if (p->prev) { - ASSERT(p->prev->next == p); - } - else { - ASSERT(runq->procs.prio[prioq].first == p); - } - if (p->next) { - ASSERT(p->next->prev == p); - } - else { - ASSERT(runq->procs.prio[prioq].last == p); - } - ASSERT(p->run_queue == runq); - prevp = p; - } - } - - ASSERT(!p_in_q || found_p_in_q); - - tot_len = 0; - for (prio = 0; prio < ERTS_NO_PROC_PRIO_LEVELS; prio++) { - ASSERT(len[prio] == runq->procs.prio_info[prio].len); - if (len[prio]) { - ASSERT(runq->flags & (1 << prio)); - } - else { - ASSERT(!(runq->flags & (1 << prio))); - } - tot_len += len[prio]; - } - ASSERT(runq->procs.len == tot_len); -} -# define ERTS_DBG_CHK_PROCS_RUNQ(RQ) check_procs_runq((RQ), NULL, NULL) -# define ERTS_DBG_CHK_PROCS_RUNQ_PROC(RQ, P) check_procs_runq((RQ), (P), NULL) -# define ERTS_DBG_CHK_PROCS_RUNQ_NOPROC(RQ, P) check_procs_runq((RQ), NULL, (P)) -#else -# define ERTS_DBG_CHK_PROCS_RUNQ(RQ) -# define ERTS_DBG_CHK_PROCS_RUNQ_PROC(RQ, P) -# define ERTS_DBG_CHK_PROCS_RUNQ_NOPROC(RQ, P) -#endif - - -static ERTS_INLINE void -enqueue_process(ErtsRunQueue *runq, Process *p) -{ - ErtsRunPrioQueue *rpq; - ErtsRunQueueInfo *rqi; - - ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(runq)); - ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p)); - - ASSERT(p->bound_runq || !(runq->flags & ERTS_RUNQ_FLG_SUSPENDED)); - - rqi = &runq->procs.prio_info[p->prio]; - rqi->len++; - if (rqi->max_len < rqi->len) - rqi->max_len = rqi->len; - - runq->procs.len++; - runq->len++; - if (runq->max_len < runq->len) - runq->max_len = runq->len; - - runq->flags |= (1 << p->prio); - - rpq = (p->prio == PRIORITY_LOW - ? &runq->procs.prio[PRIORITY_NORMAL] - : &runq->procs.prio[p->prio]); - - p->next = NULL; - p->prev = rpq->last; - if (rpq->last) - rpq->last->next = p; - else - rpq->first = p; - rpq->last = p; - - switch (p->status) { - case P_EXITING: - break; - case P_GARBING: - p->gcstatus = P_RUNABLE; - break; - default: - p->status = P_RUNABLE; - break; - } - -#ifdef ERTS_SMP - p->status_flags |= ERTS_PROC_SFLG_INRUNQ; -#endif - - ERTS_DBG_CHK_PROCS_RUNQ_PROC(runq, p); -} - - -static ERTS_INLINE int -dequeue_process(ErtsRunQueue *runq, Process *p) -{ - ErtsRunPrioQueue *rpq; - int res = 1; - - ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(runq)); - ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p)); - - ERTS_DBG_CHK_PROCS_RUNQ(runq); - - rpq = &runq->procs.prio[p->prio == PRIORITY_LOW ? PRIORITY_NORMAL : p->prio]; - if (p->prev) { - p->prev->next = p->next; - } - else if (rpq->first == p) { - rpq->first = p->next; - } - else { - res = 0; - } - if (p->next) { - p->next->prev = p->prev; - } - else if (rpq->last == p) { - rpq->last = p->prev; - } - else { - ASSERT(res == 0); - } - - if (res) { - - if (--runq->procs.prio_info[p->prio].len == 0) - runq->flags &= ~(1 << p->prio); - runq->procs.len--; - runq->len--; - -#ifdef ERTS_SMP - p->status_flags &= ~ERTS_PROC_SFLG_INRUNQ; -#endif - } - - ERTS_DBG_CHK_PROCS_RUNQ_NOPROC(runq, p); - return res; -} - -/* schedule a process */ -static ERTS_INLINE ErtsRunQueue * -internal_add_to_runq(ErtsRunQueue *runq, Process *p) -{ - Uint32 prev_status = p->status; - ErtsRunQueue *add_runq; -#ifdef ERTS_SMP - - ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p)); - ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(runq)); - - if (p->status_flags & ERTS_PROC_SFLG_INRUNQ) - return NULL; - else if (p->runq_flags & ERTS_PROC_RUNQ_FLG_RUNNING) { - ASSERT(ERTS_PROC_IS_EXITING(p) || p->rcount == 0); - ERTS_DBG_CHK_PROCS_RUNQ_NOPROC(runq, p); - p->status_flags |= ERTS_PROC_SFLG_PENDADD2SCHEDQ; - return NULL; - } - ASSERT(!p->scheduler_data); -#endif - - ERTS_DBG_CHK_PROCS_RUNQ_NOPROC(runq, p); -#ifndef ERTS_SMP - /* Never schedule a suspended process (ok in smp case) */ - ASSERT(ERTS_PROC_IS_EXITING(p) || p->rcount == 0); - add_runq = runq; -#else - ASSERT(!p->bound_runq || p->bound_runq == p->run_queue); - if (p->bound_runq) { - if (p->bound_runq == runq) - add_runq = runq; - else { - add_runq = p->bound_runq; - erts_smp_xrunq_lock(runq, add_runq); - } - } - else { - add_runq = erts_check_emigration_need(runq, p->prio); - if (!add_runq) - add_runq = runq; - else /* Process emigrated */ - p->run_queue = add_runq; - } -#endif - - /* Enqueue the process */ - enqueue_process(add_runq, p); - - if ((erts_system_profile_flags.runnable_procs) - && (prev_status == P_WAITING - || prev_status == P_SUSPENDED)) { - profile_runnable_proc(p, am_active); - } - - if (add_runq != runq) - erts_smp_runq_unlock(add_runq); - - return add_runq; -} - - -void -erts_add_to_runq(Process *p) -{ - ErtsRunQueue *notify_runq; - ErtsRunQueue *runq = erts_get_runq_proc(p); - erts_smp_runq_lock(runq); - notify_runq = internal_add_to_runq(runq, p); - erts_smp_runq_unlock(runq); - smp_notify_inc_runq(notify_runq); - -} - -/* Possibly remove a scheduled process we need to suspend */ - -static int -remove_proc_from_runq(ErtsRunQueue *rq, Process *p, int to_inactive) -{ - int res; - - ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p)); - -#ifdef ERTS_SMP - if (p->status_flags & ERTS_PROC_SFLG_PENDADD2SCHEDQ) { - p->status_flags &= ~ERTS_PROC_SFLG_PENDADD2SCHEDQ; - ASSERT(!remove_proc_from_runq(rq, p, 0)); - return 1; - } -#endif - - res = dequeue_process(rq, p); - - if (res && erts_system_profile_flags.runnable_procs && to_inactive) - profile_runnable_proc(p, am_inactive); - -#ifdef ERTS_SMP - ASSERT(!(p->status_flags & ERTS_PROC_SFLG_INRUNQ)); -#endif - - return res; -} - -#ifdef ERTS_SMP - -ErtsMigrateResult -erts_proc_migrate(Process *p, ErtsProcLocks *plcks, - ErtsRunQueue *from_rq, int *from_locked, - ErtsRunQueue *to_rq, int *to_locked) -{ - ERTS_SMP_LC_ASSERT(*plcks == erts_proc_lc_my_proc_locks(p)); - ERTS_SMP_LC_ASSERT((ERTS_PROC_LOCK_STATUS & *plcks) - || from_locked); - ERTS_SMP_LC_CHK_RUNQ_LOCK(from_rq, *from_locked); - ERTS_SMP_LC_CHK_RUNQ_LOCK(to_rq, *to_locked); - - /* - * If we have the lock on the run queue to migrate to, - * check that it isn't suspended. If it is suspended, - * we will refuse to migrate to it anyway. - */ - if (*to_locked && (to_rq->flags & ERTS_RUNQ_FLG_SUSPENDED)) - return ERTS_MIGRATE_FAILED_RUNQ_SUSPENDED; - - /* We need status lock on process and locks on both run queues */ - - if (!(ERTS_PROC_LOCK_STATUS & *plcks)) { - if (erts_smp_proc_trylock(p, ERTS_PROC_LOCK_STATUS) == EBUSY) { - ErtsProcLocks lcks = *plcks; - Eterm pid = p->id; - Process *proc = *plcks ? p : NULL; - - if (*from_locked) { - *from_locked = 0; - erts_smp_runq_unlock(from_rq); - } - if (*to_locked) { - *to_locked = 0; - erts_smp_runq_unlock(to_rq); - } - - proc = erts_pid2proc_opt(proc, - lcks, - pid, - lcks|ERTS_PROC_LOCK_STATUS, - ERTS_P2P_FLG_ALLOW_OTHER_X); - if (!proc) { - *plcks = 0; - return ERTS_MIGRATE_FAILED_NOT_IN_RUNQ; - } - ASSERT(proc == p); - } - *plcks |= ERTS_PROC_LOCK_STATUS; - } - - ASSERT(!p->bound_runq); - - ERTS_SMP_LC_CHK_RUNQ_LOCK(from_rq, *from_locked); - ERTS_SMP_LC_CHK_RUNQ_LOCK(to_rq, *to_locked); - - if (p->run_queue != from_rq) - return ERTS_MIGRATE_FAILED_RUNQ_CHANGED; - - if (!*from_locked || !*to_locked) { - if (from_rq < to_rq) { - if (!*to_locked) { - if (!*from_locked) - erts_smp_runq_lock(from_rq); - erts_smp_runq_lock(to_rq); - } - else if (erts_smp_runq_trylock(from_rq) == EBUSY) { - erts_smp_runq_unlock(to_rq); - erts_smp_runq_lock(from_rq); - erts_smp_runq_lock(to_rq); - } - } - else { - if (!*from_locked) { - if (!*to_locked) - erts_smp_runq_lock(to_rq); - erts_smp_runq_lock(from_rq); - } - else if (erts_smp_runq_trylock(to_rq) == EBUSY) { - erts_smp_runq_unlock(from_rq); - erts_smp_runq_lock(to_rq); - erts_smp_runq_lock(from_rq); - } - } - *to_locked = *from_locked = 1; - } - - ERTS_SMP_LC_CHK_RUNQ_LOCK(from_rq, *from_locked); - ERTS_SMP_LC_CHK_RUNQ_LOCK(to_rq, *to_locked); - - /* Ok we now got all locks we need; do it... */ - - /* Refuse to migrate to a suspended run queue */ - if (to_rq->flags & ERTS_RUNQ_FLG_SUSPENDED) - return ERTS_MIGRATE_FAILED_RUNQ_SUSPENDED; - - if ((p->runq_flags & ERTS_PROC_RUNQ_FLG_RUNNING) - || !(p->status_flags & ERTS_PROC_SFLG_INRUNQ)) - return ERTS_MIGRATE_FAILED_NOT_IN_RUNQ; - - dequeue_process(from_rq, p); - p->run_queue = to_rq; - enqueue_process(to_rq, p); - - return ERTS_MIGRATE_SUCCESS; -} -#endif /* ERTS_SMP */ - Eterm erts_process_status(Process *c_p, ErtsProcLocks c_p_locks, Process *rp, Eterm rpid) { Eterm res = am_undefined; - Process *p; - - if (rp) { - ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS - & erts_proc_lc_my_proc_locks(rp)); - p = rp; - } - else { - p = erts_pid2proc_opt(c_p, c_p_locks, - rpid, ERTS_PROC_LOCK_STATUS, - ERTS_P2P_FLG_ALLOW_OTHER_X); - } + Process *p = rp ? rp : erts_proc_lookup_raw(rpid); if (p) { - switch (p->status) { - case P_RUNABLE: - res = am_runnable; - break; - case P_WAITING: - res = am_waiting; - break; - case P_RUNNING: - res = am_running; - break; - case P_EXITING: + erts_aint32_t state = erts_smp_atomic32_read_acqb(&p->state); + if (state & ERTS_PSFLG_FREE) + res = am_free; + else if (state & ERTS_PSFLG_EXITING) res = am_exiting; - break; - case P_GARBING: + else if (state & ERTS_PSFLG_GC) res = am_garbage_collecting; - break; - case P_SUSPENDED: + else if (state & ERTS_PSFLG_SUSPENDED) res = am_suspended; - break; - case P_FREE: /* We cannot look up a process in P_FREE... */ - default: /* Not a valid status... */ - erl_exit(1, "Bad status (%b32u) found for process %T\n", - p->status, p->id); - break; - } - -#ifdef ERTS_SMP - if (!rp && (p != c_p || !(ERTS_PROC_LOCK_STATUS & c_p_locks))) - erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + else if (state & ERTS_PSFLG_RUNNING) + res = am_running; + else if (state & ERTS_PSFLG_ACTIVE) + res = am_runnable; + else + res = am_waiting; } +#ifdef ERTS_SMP else { int i; ErtsSchedulerData *esdp; @@ -6309,42 +6501,40 @@ erts_process_status(Process *c_p, ErtsProcLocks c_p_locks, } erts_smp_runq_unlock(esdp->run_queue); } - -#endif - } - +#endif return res; } /* -** Suspend a process +** Suspend a currently executing process ** If we are to suspend on a port the busy_port is the thing ** otherwise busy_port is NIL */ void -erts_suspend(Process* process, ErtsProcLocks process_locks, Port *busy_port) +erts_suspend(Process* c_p, ErtsProcLocks c_p_locks, Port *busy_port) { - ErtsRunQueue *rq; - - ERTS_SMP_LC_ASSERT(process_locks == erts_proc_lc_my_proc_locks(process)); - if (!(process_locks & ERTS_PROC_LOCK_STATUS)) - erts_smp_proc_lock(process, ERTS_PROC_LOCK_STATUS); - - rq = erts_get_runq_proc(process); - - erts_smp_runq_lock(rq); +#ifdef DEBUG + int res; +#endif + ASSERT(c_p == erts_get_current_process()); + ERTS_SMP_LC_ASSERT(c_p_locks == erts_proc_lc_my_proc_locks(c_p)); + if (!(c_p_locks & ERTS_PROC_LOCK_STATUS)) + erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_STATUS); - suspend_process(rq, process); +#ifdef DEBUG + res = +#endif + suspend_process(c_p, c_p); - erts_smp_runq_unlock(rq); + ASSERT(res); if (busy_port) - erts_wake_process_later(busy_port, process); + erts_wake_process_later(busy_port, c_p); - if (!(process_locks & ERTS_PROC_LOCK_STATUS)) - erts_smp_proc_unlock(process, ERTS_PROC_LOCK_STATUS); + if (!(c_p_locks & ERTS_PROC_LOCK_STATUS)) + erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_STATUS); } @@ -6385,57 +6575,54 @@ erts_resume_processes(ErtsProcList *plp) Eterm erts_get_process_priority(Process *p) { - ErtsRunQueue *rq; - Eterm value; - ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p)); - rq = erts_get_runq_proc(p); - erts_smp_runq_lock(rq); - switch(p->prio) { - case PRIORITY_MAX: value = am_max; break; - case PRIORITY_HIGH: value = am_high; break; - case PRIORITY_NORMAL: value = am_normal; break; - case PRIORITY_LOW: value = am_low; break; - default: ASSERT(0); value = am_undefined; break; + erts_aint32_t state = erts_smp_atomic32_read_nob(&p->state); + switch (state & ERTS_PSFLG_PRIO_MASK) { + case PRIORITY_MAX: return am_max; + case PRIORITY_HIGH: return am_high; + case PRIORITY_NORMAL: return am_normal; + case PRIORITY_LOW: return am_low; + default: ASSERT(0); return am_undefined; } - erts_smp_runq_unlock(rq); - return value; } Eterm -erts_set_process_priority(Process *p, Eterm new_value) +erts_set_process_priority(Process *p, Eterm value) { - ErtsRunQueue *rq; - Eterm old_value; - ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p)); - rq = erts_get_runq_proc(p); -#ifdef ERTS_SMP - ASSERT(!(p->status_flags & ERTS_PROC_SFLG_INRUNQ)); -#endif - erts_smp_runq_lock(rq); - switch(p->prio) { - case PRIORITY_MAX: old_value = am_max; break; - case PRIORITY_HIGH: old_value = am_high; break; - case PRIORITY_NORMAL: old_value = am_normal; break; - case PRIORITY_LOW: old_value = am_low; break; - default: ASSERT(0); old_value = am_undefined; break; - } - switch (new_value) { - case am_max: p->prio = PRIORITY_MAX; break; - case am_high: p->prio = PRIORITY_HIGH; break; - case am_normal: p->prio = PRIORITY_NORMAL; break; - case am_low: p->prio = PRIORITY_LOW; break; - default: old_value = THE_NON_VALUE; break; + erts_aint32_t a, oprio, nprio; + + switch (value) { + case am_max: nprio = (erts_aint32_t) PRIORITY_MAX; break; + case am_high: nprio = (erts_aint32_t) PRIORITY_HIGH; break; + case am_normal: nprio = (erts_aint32_t) PRIORITY_NORMAL; break; + case am_low: nprio = (erts_aint32_t) PRIORITY_LOW; break; + default: return THE_NON_VALUE; break; } - erts_smp_runq_unlock(rq); - return old_value; -} -/* note that P_RUNNING is only set so that we don't try to remove -** running processes from the schedule queue if they exit - a running -** process not being in the schedule queue!! -** Schedule for up to INPUT_REDUCTIONS context switches, -** return 1 if more to do. -*/ + a = erts_smp_atomic32_read_nob(&p->state); + if (nprio == (a & ERTS_PSFLG_PRIO_MASK)) + oprio = nprio; + else { + erts_aint32_t e, n; + do { + oprio = a & ERTS_PSFLG_PRIO_MASK; + n = e = a; + + ASSERT(!(a & ERTS_PSFLG_IN_RUNQ)); + + n &= ~ERTS_PSFLG_PRIO_MASK; + n |= nprio; + a = erts_smp_atomic32_cmpxchg_mb(&p->state, n, e); + } while (a != e); + } + + switch (oprio) { + case PRIORITY_MAX: return am_max; + case PRIORITY_HIGH: return am_high; + case PRIORITY_NORMAL: return am_normal; + case PRIORITY_LOW: return am_low; + default: ASSERT(0); return am_undefined; + } +} /* * schedule() is called from BEAM (process_main()) or HiPE @@ -6458,7 +6645,6 @@ erts_set_process_priority(Process *p, Eterm new_value) Process *schedule(Process *p, int calls) { ErtsRunQueue *rq; - ErtsRunPrioQueue *rpq; erts_aint_t dt; ErtsSchedulerData *esdp; int context_reds; @@ -6466,6 +6652,8 @@ Process *schedule(Process *p, int calls) int input_reductions; int actual_reds; int reds; + Uint32 flags; + erts_aint32_t state = 0; /* Supress warning... */ #ifdef USE_VM_PROBES if (p != NULL && DTRACE_ENABLED(process_unscheduled)) { @@ -6521,92 +6709,60 @@ Process *schedule(Process *p, int calls) erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); - if ((erts_system_profile_flags.runnable_procs) - && (p->status == P_WAITING)) { - profile_runnable_proc(p, am_inactive); - } + state = erts_smp_atomic32_read_acqb(&p->state); if (IS_TRACED(p)) { - if (IS_TRACED_FL(p, F_TRACE_CALLS) && p->status != P_FREE) { + if (IS_TRACED_FL(p, F_TRACE_CALLS) && !(state & ERTS_PSFLG_FREE)) { erts_schedule_time_break(p, ERTS_BP_CALL_TIME_SCHEDULE_OUT); } - switch (p->status) { - case P_EXITING: - if (ARE_TRACE_FLAGS_ON(p, F_TRACE_SCHED_EXIT)) - trace_sched(p, am_out_exiting); - break; - case P_FREE: + if (state & (ERTS_PSFLG_FREE|ERTS_PSFLG_EXITING)) { if (ARE_TRACE_FLAGS_ON(p, F_TRACE_SCHED_EXIT)) - trace_sched(p, am_out_exited); - break; - default: + trace_sched(p, ((state & ERTS_PSFLG_FREE) + ? am_out_exited + : am_out_exiting)); + } + else { if (ARE_TRACE_FLAGS_ON(p, F_TRACE_SCHED)) trace_sched(p, am_out); else if (ARE_TRACE_FLAGS_ON(p, F_TRACE_SCHED_PROCS)) trace_virtual_sched(p, am_out); - break; } } #ifdef ERTS_SMP - if (ERTS_PROC_PENDING_EXIT(p)) { - erts_handle_pending_exit(p, - ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS); - p->status_flags |= ERTS_PROC_SFLG_PENDADD2SCHEDQ; - } - - if (p->pending_suspenders) { - handle_pending_suspend(p, - ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS); - ASSERT(!(p->status_flags & ERTS_PROC_SFLG_PENDADD2SCHEDQ) - || p->rcount == 0); - } + if (state & ERTS_PSFLG_PENDING_EXIT) + erts_handle_pending_exit(p, (ERTS_PROC_LOCK_MAIN + | ERTS_PROC_LOCK_STATUS)); + if (p->pending_suspenders) + handle_pending_suspend(p, (ERTS_PROC_LOCK_MAIN + | ERTS_PROC_LOCK_STATUS)); #endif - erts_smp_runq_lock(rq); - ERTS_PROC_REDUCTIONS_EXECUTED(rq, p->prio, reds, actual_reds); + schedule_out_process(rq, state, p); /* Returns with rq locked! */ + + ERTS_PROC_REDUCTIONS_EXECUTED(rq, + (int) (state & ERTS_PSFLG_PRIO_MASK), + reds, + actual_reds); esdp->current_process = NULL; #ifdef ERTS_SMP p->scheduler_data = NULL; - p->runq_flags &= ~ERTS_PROC_RUNQ_FLG_RUNNING; - p->status_flags &= ~ERTS_PROC_SFLG_RUNNING; - - if (p->status_flags & ERTS_PROC_SFLG_PENDADD2SCHEDQ) { - ErtsRunQueue *notify_runq; - p->status_flags &= ~ERTS_PROC_SFLG_PENDADD2SCHEDQ; - notify_runq = internal_add_to_runq(rq, p); - if (notify_runq != rq) - smp_notify_inc_runq(notify_runq); - } #endif - if (p->status == P_FREE) { + if (state & ERTS_PSFLG_FREE) { #ifdef ERTS_SMP ASSERT(esdp->free_process == p); esdp->free_process = NULL; - erts_smp_proc_unlock(p, ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS); - erts_smp_proc_dec_refc(p); #else erts_free_proc(p); #endif - } else { - erts_smp_proc_unlock(p, ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS); } -#ifdef ERTS_SMP - { - ErtsProcList *pnd_xtrs = rq->procs.pending_exiters; - rq->procs.pending_exiters = NULL; + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS); - if (pnd_xtrs) { - erts_smp_runq_unlock(rq); - handle_pending_exiters(pnd_xtrs); - erts_smp_runq_lock(rq); - } - - } +#ifdef ERTS_SMP ASSERT(!esdp->free_process); #endif ASSERT(!esdp->current_process); @@ -6626,8 +6782,23 @@ Process *schedule(Process *p, int calls) ERTS_SMP_LC_ASSERT(!erts_thr_progress_is_blocking()); check_activities_to_run: { +#ifdef ERTS_SMP + ErtsMigrationPaths *mps; + ErtsMigrationPath *mp; #ifdef ERTS_SMP + { + ErtsProcList *pnd_xtrs = rq->procs.pending_exiters; + rq->procs.pending_exiters = NULL; + + if (pnd_xtrs) { + erts_smp_runq_unlock(rq); + handle_pending_exiters(pnd_xtrs); + erts_smp_runq_lock(rq); + } + + } +#endif if (rq->check_balance_reds <= 0) check_balance(rq); @@ -6635,20 +6806,28 @@ Process *schedule(Process *p, int calls) ERTS_SMP_LC_ASSERT(!erts_thr_progress_is_blocking()); ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); - if (rq->flags & ERTS_RUNQ_FLGS_IMMIGRATE_QMASK) - immigrate(rq); + mps = erts_get_migration_paths_managed(); + mp = &mps->mpath[rq->ix]; + + if (mp->flags & ERTS_RUNQ_FLGS_IMMIGRATE_QMASK) + immigrate(rq, mp); - continue_check_activities_to_run: + continue_check_activities_to_run: + flags = ERTS_RUNQ_FLGS_GET_NOB(rq); + continue_check_activities_to_run_known_flags: - if (rq->flags & (ERTS_RUNQ_FLG_CHK_CPU_BIND - | ERTS_RUNQ_FLG_SUSPENDED)) { - if (rq->flags & ERTS_RUNQ_FLG_SUSPENDED) { - ASSERT(erts_smp_atomic32_read_nob(&esdp->ssi->flags) - & ERTS_SSI_FLG_SUSPENDED); + + if (flags & (ERTS_RUNQ_FLG_CHK_CPU_BIND|ERTS_RUNQ_FLG_SUSPENDED)) { + + if (flags & ERTS_RUNQ_FLG_SUSPENDED) { suspend_scheduler(esdp); + flags = ERTS_RUNQ_FLGS_GET_NOB(rq); } - if (rq->flags & ERTS_RUNQ_FLG_CHK_CPU_BIND) + if (flags & ERTS_RUNQ_FLG_CHK_CPU_BIND) { + flags = ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_CHK_CPU_BIND); + flags &= ~ ERTS_RUNQ_FLG_CHK_CPU_BIND; erts_sched_check_cpu_bind(esdp); + } } { @@ -6677,14 +6856,12 @@ Process *schedule(Process *p, int calls) } #endif /* ERTS_SMP */ - ASSERT(rq->len == rq->procs.len + rq->ports.info.len); - - if ((rq->len == 0 && !rq->misc.start) - || (rq->halt_in_progress - && rq->ports.info.len == 0 && !rq->misc.start)) { + flags = ERTS_RUNQ_FLGS_GET_NOB(rq); + if ((!(flags & ERTS_RUNQ_FLGS_QMASK) && !rq->misc.start) + || (rq->halt_in_progress && ERTS_EMPTY_RUNQ_PORTS(rq))) { + /* Prepare for scheduler wait */ #ifdef ERTS_SMP - ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); rq->wakeup_other = 0; @@ -6692,21 +6869,27 @@ Process *schedule(Process *p, int calls) empty_runq(rq); - if (rq->flags & ERTS_RUNQ_FLG_SUSPENDED) { - ASSERT(erts_smp_atomic32_read_nob(&esdp->ssi->flags) - & ERTS_SSI_FLG_SUSPENDED); + flags = ERTS_RUNQ_FLGS_GET_NOB(rq); + if (flags & ERTS_RUNQ_FLG_SUSPENDED) { non_empty_runq(rq); - goto continue_check_activities_to_run; + goto continue_check_activities_to_run_known_flags; } - else if (!(rq->flags & ERTS_RUNQ_FLG_INACTIVE)) { + else if (!(flags & ERTS_RUNQ_FLG_INACTIVE)) { + if (try_steal_task(rq)) { + non_empty_runq(rq); + goto continue_check_activities_to_run; + } + + ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_PROTECTED); + /* * Check for ERTS_RUNQ_FLG_SUSPENDED has to be done * after trying to steal a task. */ - if (try_steal_task(rq) - || (rq->flags & ERTS_RUNQ_FLG_SUSPENDED)) { + flags = ERTS_RUNQ_FLGS_GET_NOB(rq); + if (flags & ERTS_RUNQ_FLG_SUSPENDED) { non_empty_runq(rq); - goto continue_check_activities_to_run; + goto continue_check_activities_to_run_known_flags; } } @@ -6737,6 +6920,7 @@ Process *schedule(Process *p, int calls) erl_sys_schedule(1); dt = erts_do_time_read_and_reset(); if (dt) erts_bump_timer(dt); + #ifdef ERTS_SMP erts_smp_runq_lock(rq); clear_sys_scheduling(); @@ -6750,14 +6934,14 @@ Process *schedule(Process *p, int calls) exec_misc_ops(rq); #ifdef ERTS_SMP - wakeup_other.check(rq); + wakeup_other.check(rq, flags); #endif /* * Find a new port to run. */ - if (rq->ports.info.len) { + if (RUNQ_READ_LEN(&rq->ports.info.len)) { int have_outstanding_io; have_outstanding_io = erts_port_task_execute(rq, &esdp->current_port); if ((have_outstanding_io && fcalls > 2*input_reductions) @@ -6784,159 +6968,122 @@ Process *schedule(Process *p, int calls) /* * Find a new process to run. */ - pick_next_process: - - ERTS_DBG_CHK_PROCS_RUNQ(rq); - - switch (rq->flags & ERTS_RUNQ_FLGS_PROCS_QMASK) { - case MAX_BIT: - case MAX_BIT|HIGH_BIT: - case MAX_BIT|NORMAL_BIT: - case MAX_BIT|LOW_BIT: - case MAX_BIT|HIGH_BIT|NORMAL_BIT: - case MAX_BIT|HIGH_BIT|LOW_BIT: - case MAX_BIT|NORMAL_BIT|LOW_BIT: - case MAX_BIT|HIGH_BIT|NORMAL_BIT|LOW_BIT: - rpq = &rq->procs.prio[PRIORITY_MAX]; - break; - case HIGH_BIT: - case HIGH_BIT|NORMAL_BIT: - case HIGH_BIT|LOW_BIT: - case HIGH_BIT|NORMAL_BIT|LOW_BIT: - rpq = &rq->procs.prio[PRIORITY_HIGH]; - break; - case NORMAL_BIT: - rpq = &rq->procs.prio[PRIORITY_NORMAL]; - break; - case LOW_BIT: - rpq = &rq->procs.prio[PRIORITY_NORMAL]; - break; - case NORMAL_BIT|LOW_BIT: - rpq = &rq->procs.prio[PRIORITY_NORMAL]; - ASSERT(rpq->first != NULL); - p = rpq->first; - if (p->prio == PRIORITY_LOW) { - if (p == rpq->last || p->skipped >= RESCHEDULE_LOW-1) - p->skipped = 0; - else { - /* skip it */ - p->skipped++; - rpq->first = p->next; - rpq->first->prev = NULL; - rpq->last->next = p; - p->prev = rpq->last; - p->next = NULL; - rpq->last = p; + pick_next_process: { + int prio_q; + int qmask; + + flags = ERTS_RUNQ_FLGS_GET_NOB(rq); + qmask = (int) (flags & ERTS_RUNQ_FLGS_PROCS_QMASK); + switch (qmask & -qmask) { + case MAX_BIT: + prio_q = PRIORITY_MAX; + break; + case HIGH_BIT: + prio_q = PRIORITY_HIGH; + break; + case NORMAL_BIT: + case LOW_BIT: + prio_q = PRIORITY_NORMAL; + if (check_requeue_process(rq, PRIORITY_NORMAL)) goto pick_next_process; - } + break; + case 0: /* No process at all */ + default: + ASSERT(qmask == 0); + goto check_activities_to_run; } - break; - case 0: /* No process at all */ - default: - ASSERT((rq->flags & ERTS_RUNQ_FLGS_PROCS_QMASK) == 0); - ASSERT(rq->procs.len == 0); - goto check_activities_to_run; - } - - BM_START_TIMER(system); - - /* - * Take the chosen process out of the queue. - */ - ASSERT(rpq->first); /* Wrong qmask in rq->flags? */ - p = rpq->first; -#ifdef ERTS_SMP - ERTS_SMP_LC_ASSERT(rq == p->run_queue); -#endif - rpq->first = p->next; - if (!rpq->first) - rpq->last = NULL; - else - rpq->first->prev = NULL; - p->next = p->prev = NULL; + BM_START_TIMER(system); - if (--rq->procs.prio_info[p->prio].len == 0) - rq->flags &= ~(1 << p->prio); - ASSERT(rq->procs.len > 0); - rq->procs.len--; - ASSERT(rq->len > 0); - rq->len--; + /* + * Take the chosen process out of the queue. + */ + p = dequeue_process(rq, prio_q, &state); - { - Uint32 ee_flgs = (ERTS_RUNQ_FLG_EVACUATE(p->prio) - | ERTS_RUNQ_FLG_EMIGRATE(p->prio)); + ASSERT(p); /* Wrong qmask in rq->flags? */ - if ((rq->flags & (ERTS_RUNQ_FLG_SUSPENDED|ee_flgs)) == ee_flgs) - ERTS_UNSET_RUNQ_FLG_EVACUATE(rq->flags, p->prio); - } + while (1) { + erts_aint32_t exp, new, tmp; + tmp = new = exp = state; + new &= ~ERTS_PSFLG_IN_RUNQ; + tmp = state & (ERTS_PSFLG_SUSPENDED|ERTS_PSFLG_PENDING_EXIT); + if (tmp != ERTS_PSFLG_SUSPENDED) + new |= ERTS_PSFLG_RUNNING; + state = erts_smp_atomic32_cmpxchg_relb(&p->state, new, exp); + if (state == exp) { + tmp = state & (ERTS_PSFLG_SUSPENDED|ERTS_PSFLG_PENDING_EXIT); + if (tmp == ERTS_PSFLG_SUSPENDED) + goto pick_next_process; + state = new; + break; + } + } - ERTS_DBG_CHK_PROCS_RUNQ_NOPROC(rq, p); + rq->procs.context_switches++; - rq->procs.context_switches++; + esdp->current_process = p; - esdp->current_process = p; + } #ifdef ERTS_SMP - p->runq_flags |= ERTS_PROC_RUNQ_FLG_RUNNING; erts_smp_runq_unlock(rq); + if (flags & ERTS_RUNQ_FLG_PROTECTED) + ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_PROTECTED); + ERTS_SMP_CHK_NO_PROC_LOCKS; erts_smp_proc_lock(p, ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS); if (erts_sched_stat.enabled) { + int prio; UWord old = ERTS_PROC_SCHED_ID(p, (ERTS_PROC_LOCK_MAIN | ERTS_PROC_LOCK_STATUS), (UWord) esdp->no); int migrated = old && old != esdp->no; + prio = (int) (state & ERTS_PSFLG_PRIO_MASK); + erts_smp_spin_lock(&erts_sched_stat.lock); - erts_sched_stat.prio[p->prio].total_executed++; - erts_sched_stat.prio[p->prio].executed++; + erts_sched_stat.prio[prio].total_executed++; + erts_sched_stat.prio[prio].executed++; if (migrated) { - erts_sched_stat.prio[p->prio].total_migrated++; - erts_sched_stat.prio[p->prio].migrated++; + erts_sched_stat.prio[prio].total_migrated++; + erts_sched_stat.prio[prio].migrated++; } erts_smp_spin_unlock(&erts_sched_stat.lock); } - p->status_flags |= ERTS_PROC_SFLG_RUNNING; - p->status_flags &= ~ERTS_PROC_SFLG_INRUNQ; if (ERTS_PROC_PENDING_EXIT(p)) { erts_handle_pending_exit(p, ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS); + state = erts_smp_atomic32_read_nob(&p->state); } ASSERT(!p->scheduler_data); p->scheduler_data = esdp; - #endif - ASSERT(p->status != P_SUSPENDED); /* Never run a suspended process */ + /* Never run a suspended process */ + ASSERT(!(ERTS_PSFLG_SUSPENDED & erts_smp_atomic32_read_nob(&p->state))); reds = context_reds; if (IS_TRACED(p)) { - switch (p->status) { - case P_EXITING: + if (state & ERTS_PSFLG_EXITING) { if (ARE_TRACE_FLAGS_ON(p, F_TRACE_SCHED_EXIT)) trace_sched(p, am_in_exiting); - break; - default: + } + else { if (ARE_TRACE_FLAGS_ON(p, F_TRACE_SCHED)) trace_sched(p, am_in); else if (ARE_TRACE_FLAGS_ON(p, F_TRACE_SCHED_PROCS)) trace_virtual_sched(p, am_in); - break; } if (IS_TRACED_FL(p, F_TRACE_CALLS)) { erts_schedule_time_break(p, ERTS_BP_CALL_TIME_SCHEDULE_IN); } } - if (p->status != P_EXITING) - p->status = P_RUNNING; - erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); #ifdef ERTS_SMP @@ -6944,7 +7091,7 @@ Process *schedule(Process *p, int calls) erts_check_my_tracer_proc(p); #endif - if (!ERTS_PROC_IS_EXITING(p) + if (!(state & ERTS_PSFLG_EXITING) && ((FLAGS(p) & F_FORCE_GC) || (MSO(p).overhead > BIN_VHEAP_SZ(p)))) { reds -= erts_garbage_collect(p, 0, p->arg_reg, p->arity); @@ -7035,17 +7182,19 @@ erts_schedule_misc_op(void (*func)(void *), void *arg) ErtsSchedulerData *esdp = erts_get_scheduler_data(); ErtsRunQueue *rq = esdp ? esdp->run_queue : ERTS_RUNQ_IX(0); ErtsMiscOpList *molp = misc_op_list_alloc(); +#ifdef ERTS_SMP + ErtsMigrationPaths *mpaths = erts_get_migration_paths(); - erts_smp_runq_lock(rq); - - while (rq->misc.evac_runq) { - ErtsRunQueue *tmp_rq = rq->misc.evac_runq; - erts_smp_runq_unlock(rq); - rq = tmp_rq; - erts_smp_runq_lock(rq); + if (!mpaths) + rq = ERTS_RUNQ_IX(0); + else { + ErtsRunQueue *erq = mpaths->mpath[rq->ix].misc_evac_runq; + if (erq) + rq = erq; } +#endif - ASSERT(!(rq->flags & ERTS_RUNQ_FLG_SUSPENDED)); + erts_smp_runq_lock(rq); molp->next = NULL; molp->func = func; @@ -7055,7 +7204,9 @@ erts_schedule_misc_op(void (*func)(void *), void *arg) else rq->misc.start = molp; rq->misc.end = molp; + erts_smp_runq_unlock(rq); + smp_notify_inc_runq(rq); } @@ -7145,44 +7296,50 @@ erts_get_exact_total_reductions(Process *c_p, Uint *redsp, Uint *diffp) Sint erts_test_next_pid(int set, Uint next) { + Uint64 lpd; Sint res; - Sint p_prev; - + Eterm pid_data; + int first_pix = -1; - erts_smp_mtx_lock(&proc_tab_mtx); + erts_smp_rwmtx_rwlock(&erts_proc_tab_rwmtx); - if (!set) { - res = p_next < 0 ? -1 : (p_serial << p_serial_shift | p_next); - } + if (!set) + lpd = last_pid_data_read_nob(); else { - p_serial = (Sint) ((next >> p_serial_shift) & p_serial_mask); - p_next = (Sint) (erts_process_tab_index_mask & next); - - if (p_next >= erts_max_processes) { - p_next = 0; - p_serial++; - p_serial &= p_serial_mask; + lpd = (Uint64) next; + pid_data = (Eterm) (lpd & ERTS_PID_DATA_MASK__); + if (ERTS_INVALID_PID == make_internal_pid(pid_data)) { + lpd += erts_proc.max; + ASSERT(erts_pid_data2ix(pid_data) + == erts_pid_data2ix(lpd & ERTS_PID_DATA_MASK__)); } + last_pid_data_set_relb(lpd); + } - p_prev = p_next; - - do { - if (!process_tab[p_next]) - break; - p_next++; - if(p_next >= erts_max_processes) { - p_next = 0; - p_serial++; - p_serial &= p_serial_mask; + while (1) { + int pix; + lpd++; + pix = (int) (lpd % erts_proc.max); + if (first_pix < 0) + first_pix = pix; + else if (pix == first_pix) { + res = -1; + break; + } + if (ERTS_AINT_NULL == erts_smp_atomic_read_nob(&erts_proc.tab[pix])) { + pid_data = (Eterm) (lpd & ERTS_PID_DATA_MASK__); + if (ERTS_INVALID_PID == make_internal_pid(pid_data)) { + lpd += erts_proc.max; + ASSERT(erts_pid_data2ix(pid_data) + == erts_pid_data2ix(lpd & ERTS_PID_DATA_MASK__)); } - } while (p_prev != p_next); - - res = process_tab[p_next] ? -1 : (p_serial << p_serial_shift | p_next); - + res = lpd & ERTS_PID_DATA_MASK__; + break; + } } - erts_smp_mtx_unlock(&proc_tab_mtx); + erts_smp_rwmtx_rwunlock(&erts_proc_tab_rwmtx); return res; @@ -7191,6 +7348,8 @@ erts_test_next_pid(int set, Uint next) Uint erts_process_count(void) { erts_aint32_t res = erts_smp_atomic32_read_nob(&process_count); + if (res > erts_proc.max) + return erts_proc.max; ASSERT(res >= 0); return (Uint) res; } @@ -7198,97 +7357,138 @@ Uint erts_process_count(void) void erts_free_proc(Process *p) { -#if defined(ERTS_ENABLE_LOCK_COUNT) && defined(ERTS_SMP) - erts_lcnt_proc_lock_destroy(p); +#ifdef ERTS_SMP + erts_proc_lock_fin(p); #endif erts_free(ERTS_ALC_T_PROC, (void *) p); } - /* ** Allocate process and find out where to place next process. */ static Process* -alloc_process(void) +alloc_process(ErtsRunQueue *rq, erts_aint32_t state) { -#ifdef ERTS_SMP - erts_pix_lock_t *pix_lock; -#endif + int pix; Process* p; - int p_prev; + Uint64 lpd, exp_lpd; + Eterm pid_data; + erts_aint32_t proc_count; +#ifdef DEBUG + Eterm pid; +#endif - erts_smp_mtx_lock(&proc_tab_mtx); + erts_smp_rwmtx_rlock(&erts_proc_tab_rwmtx); + + proc_count = erts_smp_atomic32_inc_read_acqb(&process_count); + if (proc_count > erts_proc.max) { + while (1) { + erts_aint32_t act_proc_count; - if (p_next == -1) { - p = NULL; - goto error; /* Process table full! */ + act_proc_count = erts_smp_atomic32_cmpxchg_relb(&process_count, + proc_count-1, + proc_count); + if (act_proc_count == proc_count) + goto system_limit; + proc_count = act_proc_count; + if (proc_count <= erts_proc.max) + break; + } } p = (Process*) erts_alloc_fnf(ERTS_ALC_T_PROC, sizeof(Process)); if (!p) - goto error; /* ENOMEM */ + goto enomem; - p_last = p_next; + p->approx_started = erts_get_approx_time(); + p->started_interval = get_proc_interval(); - erts_get_emu_time(&p->started); + lpd = last_pid_data_read_acqb(); -#ifdef ERTS_SMP - pix_lock = ERTS_PIX2PIXLOCK(p_next); - erts_pix_lock(pix_lock); -#endif - ASSERT(!process_tab[p_next]); + /* Reserve slot */ + while (1) { + lpd++; + pix = erts_pid_data2ix((Eterm) (lpd & ERTS_PID_DATA_MASK__)); + if (erts_smp_atomic_read_nob(&erts_proc.tab[pix]) == ERTS_AINT_NULL) { + erts_aint_t val; + val = erts_smp_atomic_cmpxchg_relb(&erts_proc.tab[pix], + ((erts_aint_t) + ERTS_PROC_LOCK_BUSY), + ERTS_AINT_NULL); + + if (ERTS_AINT_NULL == val) + break; + } + } - process_tab[p_next] = p; - erts_smp_atomic32_inc_nob(&process_count); - p->id = make_internal_pid(p_serial << p_serial_shift | p_next); + pid_data = (Eterm) lpd & ERTS_PID_DATA_MASK__; + + p->id = make_internal_pid(pid_data); if (p->id == ERTS_INVALID_PID) { /* Do not use the invalid pid; change serial */ - p_serial++; - p_serial &= p_serial_mask; - p->id = make_internal_pid(p_serial << p_serial_shift | p_next); + lpd += erts_proc.max; + ASSERT(pix == erts_pid_data2ix((Eterm) (lpd & ERTS_PID_DATA_MASK__))); + pid_data = (Eterm) lpd & ERTS_PID_DATA_MASK__; + p->id = make_internal_pid(pid_data); ASSERT(p->id != ERTS_INVALID_PID); } - ASSERT(internal_pid_serial(p->id) <= (erts_use_r9_pids_ports - ? ERTS_MAX_PID_R9_SERIAL - : ERTS_MAX_PID_SERIAL)); + + exp_lpd = last_pid_data_read_nob(); + + /* Move last pid data forward */ + while (1) { + Uint64 act_lpd; + if (last_pid_data_cmp(lpd, exp_lpd) < 0) + break; + act_lpd = last_pid_data_cmpxchg_relb(lpd, exp_lpd); + if (act_lpd == exp_lpd) + break; + exp_lpd = act_lpd; + } #ifdef ERTS_SMP - erts_proc_lock_init(p); /* All locks locked */ - erts_pix_unlock(pix_lock); + RUNQ_SET_RQ(&p->run_queue, rq); #endif - p->rstatus = P_FREE; - p->rcount = 0; + erts_smp_atomic32_init_relb(&p->state, state); - /* - * set p_next to the next available slot - */ +#ifdef DEBUG + pid = p->id; +#endif - p_prev = p_next; +#ifdef ERTS_SMP + erts_proc_lock_init(p); /* All locks locked */ +#endif - while (1) { - p_next++; - if(p_next >= erts_max_processes) { - p_serial++; - p_serial &= p_serial_mask; - p_next = 0; - } + /* Move into slot reserved */ +#ifdef DEBUG + ASSERT(ERTS_PROC_LOCK_BUSY + == (Process *) erts_smp_atomic_xchg_relb(&erts_proc.tab[pix], + (erts_aint_t) p)); +#else + erts_smp_atomic_set_relb(&erts_proc.tab[pix], (erts_aint_t) p); +#endif - if (p_prev == p_next) { - p_next = -1; - break; /* Table full! */ - } + ASSERT(internal_pid_serial(p->id) <= (erts_use_r9_pids_ports + ? ERTS_MAX_PID_R9_SERIAL + : ERTS_MAX_PID_SERIAL)); - if (!process_tab[p_next]) - break; /* found a free slot */ - } + erts_smp_rwmtx_runlock(&erts_proc_tab_rwmtx); - error: + p->rcount = 0; - erts_smp_mtx_unlock(&proc_tab_mtx); + ASSERT(p == (Process *) + erts_smp_atomic_read_nob( + &erts_proc.tab[internal_pid_index(pid)])); return p; +enomem: +system_limit: + + erts_smp_rwmtx_runlock(&erts_proc_tab_rwmtx); + return NULL; + } Eterm @@ -7298,13 +7498,15 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). Eterm args, /* Arguments for function (must be well-formed list). */ ErlSpawnOpts* so) /* Options for spawn. */ { - ErtsRunQueue *rq, *notify_runq; + ErtsRunQueue *rq = NULL; Process *p; Sint arity; /* Number of arguments. */ Uint arg_size; /* Size of arguments. */ Uint sz; /* Needed words on heap. */ Uint heap_need; /* Size needed on heap. */ Eterm res = THE_NON_VALUE; + erts_aint32_t state = 0; + erts_aint32_t prio = (erts_aint32_t) PRIORITY_NORMAL; #ifdef ERTS_SMP erts_smp_proc_lock(parent, ERTS_PROC_LOCKS_ALL_MINOR); @@ -7318,8 +7520,24 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). so->error_code = BADARG; goto error; } - p = alloc_process(); /* All proc locks are locked by this thread - on success */ + + if (so->flags & SPO_USE_ARGS) { + if (so->scheduler) { + int ix = so->scheduler-1; + ASSERT(0 <= ix && ix < erts_no_run_queues); + rq = ERTS_RUNQ_IX(ix); + state |= ERTS_PSFLG_BOUND; + } + prio = (erts_aint32_t) so->priority; + } + + state |= (prio & ERTS_PSFLG_PRIO_MASK); + + if (!rq) + rq = erts_get_runq_proc(parent); + + p = alloc_process(rq, state); /* All proc locks are locked by this thread + on success */ if (!p) { erts_send_error_to_logger_str(parent->group_leader, "Too many processes\n"); @@ -7339,22 +7557,16 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). p->flags = erts_default_process_flags; - /* Scheduler queue mutex should be locked when changeing - * prio. In this case we don't have to lock it, since - * noone except us has access to the process. - */ if (so->flags & SPO_USE_ARGS) { p->min_heap_size = so->min_heap_size; p->min_vheap_size = so->min_vheap_size; - p->prio = so->priority; p->max_gen_gcs = so->max_gen_gcs; } else { p->min_heap_size = H_MIN_SIZE; p->min_vheap_size = BIN_VH_MIN_SIZE; - p->prio = PRIORITY_NORMAL; p->max_gen_gcs = (Uint16) erts_smp_atomic32_read_nob(&erts_max_gen_gcs); } - p->skipped = 0; + p->schedule_count = 0; ASSERT(p->min_heap_size == erts_next_heap_size(p->min_heap_size, 0)); p->initial[INITIAL_MOD] = mod; @@ -7456,7 +7668,6 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). p->msg_inq.first = NULL; p->msg_inq.last = &p->msg_inq.first; p->msg_inq.len = 0; - p->bound_runq = NULL; #endif p->bif_timers = NULL; p->mbuf = NULL; @@ -7542,9 +7753,6 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). #ifdef ERTS_SMP p->scheduler_data = NULL; - p->is_exiting = 0; - p->status_flags = 0; - p->runq_flags = 0; p->suspendee = NIL; p->pending_suspenders = NULL; p->pending_exit.reason = THE_NON_VALUE; @@ -7555,34 +7763,15 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). p->fp_exception = 0; #endif + erts_smp_proc_unlock(p, ERTS_PROC_LOCKS_ALL); + + res = p->id; + /* * Schedule process for execution. */ - if (!((so->flags & SPO_USE_ARGS) && so->scheduler)) - rq = erts_get_runq_proc(parent); - else { - int ix = so->scheduler-1; - ASSERT(0 <= ix && ix < erts_no_run_queues); - rq = ERTS_RUNQ_IX(ix); - p->bound_runq = rq; - } - - erts_smp_runq_lock(rq); - -#ifdef ERTS_SMP - p->run_queue = rq; -#endif - - p->status = P_WAITING; - notify_runq = internal_add_to_runq(rq, p); - - erts_smp_runq_unlock(rq); - - smp_notify_inc_runq(notify_runq); - - res = p->id; - erts_smp_proc_unlock(p, ERTS_PROC_LOCKS_ALL); + schedule_process(p, state, 0); VERBOSE(DEBUG_PROCESSES, ("Created a new process: %T\n",p->id)); @@ -7618,12 +7807,8 @@ void erts_init_empty_process(Process *p) p->max_gen_gcs = 0; p->min_heap_size = 0; p->min_vheap_size = 0; - p->status = P_RUNABLE; - p->gcstatus = P_RUNABLE; - p->rstatus = P_RUNABLE; p->rcount = 0; p->id = ERTS_INVALID_PID; - p->prio = PRIORITY_NORMAL; p->reds = 0; p->tracer_proc = NIL; p->trace_flags = F_INITIAL_TRACE_FLAGS; @@ -7640,7 +7825,6 @@ void erts_init_empty_process(Process *p) p->bin_vheap_mature = 0; #ifdef ERTS_SMP p->u.ptimer = NULL; - p->bound_runq = NULL; #else memset(&(p->u.tm), 0, sizeof(ErlTimer)); #endif @@ -7691,8 +7875,8 @@ void erts_init_empty_process(Process *p) p->def_arg_reg[5] = 0; p->parent = NIL; - p->started.tv_sec = 0; - p->started.tv_usec = 0; + p->approx_started = 0; + p->started_interval = 0; #ifdef HIPE hipe_init_process(&p->hipe); @@ -7706,12 +7890,10 @@ void erts_init_empty_process(Process *p) p->last_old_htop = NULL; #endif + erts_smp_atomic32_init_nob(&p->state, (erts_aint32_t) PRIORITY_NORMAL); #ifdef ERTS_SMP p->scheduler_data = NULL; - p->is_exiting = 0; - p->status_flags = 0; - p->runq_flags = 0; p->msg_inq.first = NULL; p->msg_inq.last = &p->msg_inq.first; p->msg_inq.len = 0; @@ -7721,7 +7903,7 @@ void erts_init_empty_process(Process *p) p->pending_exit.bp = NULL; erts_proc_lock_init(p); erts_smp_proc_unlock(p, ERTS_PROC_LOCKS_ALL); - p->run_queue = ERTS_RUNQ_IX(0); + RUNQ_SET_RQ(&p->run_queue, ERTS_RUNQ_IX(0)); #endif #if !defined(NO_FPE_SIGNALS) || defined(HIPE) @@ -7799,8 +7981,8 @@ erts_cleanup_empty_process(Process* p) free_message_buffer(p->mbuf); p->mbuf = NULL; } -#if defined(ERTS_ENABLE_LOCK_COUNT) && defined(ERTS_SMP) - erts_lcnt_proc_lock_destroy(p); +#ifdef ERTS_SMP + erts_proc_lock_fin(p); #endif #ifdef DEBUG erts_debug_verify_clean_empty_process(p); @@ -7897,26 +8079,34 @@ delete_process(Process* p) p->fvalue = NIL; } +static ERTS_INLINE erts_aint32_t +set_proc_exiting_state(Process *p, erts_aint32_t state) +{ + erts_aint32_t a, n, e; + a = state; + while (1) { + n = e = a; + n &= ~(ERTS_PSFLG_SUSPENDED|ERTS_PSFLG_PENDING_EXIT); + n |= ERTS_PSFLG_EXITING|ERTS_PSFLG_ACTIVE; + if (!(a & (ERTS_PSFLG_IN_RUNQ|ERTS_PSFLG_RUNNING))) + n |= ERTS_PSFLG_IN_RUNQ; + a = erts_smp_atomic32_cmpxchg_relb(&p->state, n, e); + if (a == e) + break; + } + return a; +} + static ERTS_INLINE void -set_proc_exiting(Process *p, Eterm reason, ErlHeapFragment *bp) +set_proc_exiting(Process *p, + erts_aint32_t state, + Eterm reason, + ErlHeapFragment *bp) { -#ifdef ERTS_SMP - erts_pix_lock_t *pix_lock = ERTS_PID2PIXLOCK(p->id); ERTS_SMP_LC_ASSERT(erts_proc_lc_my_proc_locks(p) == ERTS_PROC_LOCKS_ALL); - /* - * You are required to have all proc locks and the pix lock when going - * to status P_EXITING. This makes it is enough to take any lock when - * looking up a process (pid2proc()) to prevent the looked up process - * from exiting until the lock has been released. - */ - erts_pix_lock(pix_lock); - p->is_exiting = 1; -#endif - p->status = P_EXITING; -#ifdef ERTS_SMP - erts_pix_unlock(pix_lock); -#endif + state = set_proc_exiting_state(p, state); + p->fvalue = reason; if (bp) erts_link_mbuf_to_proc(p, bp); @@ -7929,6 +8119,14 @@ set_proc_exiting(Process *p, Eterm reason, ErlHeapFragment *bp) KILL_CATCHES(p); cancel_timer(p); p->i = (BeamInstr *) beam_exit; + + if (erts_system_profile_flags.runnable_procs + && !(state & (ERTS_PSFLG_ACTIVE|ERTS_PSFLG_SUSPENDED))) { + profile_runnable_proc(p, am_active); + } + + if (!(state & (ERTS_PSFLG_IN_RUNQ|ERTS_PSFLG_RUNNING))) + add2runq(p, state); } @@ -7941,8 +8139,8 @@ erts_handle_pending_exit(Process *c_p, ErtsProcLocks locks) ASSERT(is_value(c_p->pending_exit.reason)); ERTS_SMP_LC_ASSERT(erts_proc_lc_my_proc_locks(c_p) == locks); ERTS_SMP_LC_ASSERT(locks & ERTS_PROC_LOCK_MAIN); - ERTS_SMP_LC_ASSERT(c_p->status != P_EXITING); - ERTS_SMP_LC_ASSERT(c_p->status != P_FREE); + ERTS_SMP_LC_ASSERT(!((ERTS_PSFLG_EXITING|ERTS_PSFLG_FREE) + & erts_smp_atomic32_read_nob(&c_p->state))); /* Ensure that all locks on c_p are locked before proceeding... */ if (locks == ERTS_PROC_LOCKS_ALL) @@ -7955,7 +8153,10 @@ erts_handle_pending_exit(Process *c_p, ErtsProcLocks locks) } } - set_proc_exiting(c_p, c_p->pending_exit.reason, c_p->pending_exit.bp); + set_proc_exiting(c_p, + erts_smp_atomic32_read_acqb(&c_p->state), + c_p->pending_exit.reason, + c_p->pending_exit.bp); c_p->pending_exit.reason = THE_NON_VALUE; c_p->pending_exit.bp = NULL; @@ -7971,11 +8172,12 @@ handle_pending_exiters(ErtsProcList *pnd_xtrs) while (plp) { Process *p = erts_pid2proc(NULL, 0, plp->pid, ERTS_PROC_LOCKS_ALL); if (p) { - if (proclist_same(plp, p) - && !(p->status_flags & ERTS_PROC_SFLG_RUNNING)) { - ASSERT(p->status_flags & ERTS_PROC_SFLG_INRUNQ); - ASSERT(ERTS_PROC_PENDING_EXIT(p)); - erts_handle_pending_exit(p, ERTS_PROC_LOCKS_ALL); + if (proclist_same(plp, p)) { + erts_aint32_t state = erts_smp_atomic32_read_acqb(&p->state); + if (!(state & ERTS_PSFLG_RUNNING)) { + ASSERT(state & ERTS_PSFLG_PENDING_EXIT); + erts_handle_pending_exit(p, ERTS_PROC_LOCKS_ALL); + } } erts_smp_proc_unlock(p, ERTS_PROC_LOCKS_ALL); } @@ -8003,7 +8205,7 @@ save_pending_exiter(Process *p) rq->procs.pending_exiters = plp; erts_smp_runq_unlock(rq); - + wake_scheduler(rq, 1); } #endif @@ -8065,7 +8267,7 @@ send_exit_message(Process *to, ErtsProcLocks *to_locksp, * SMP emulator). When the signal is received the receiver receives an * 'EXIT' message if it is trapping exits; otherwise, it will either * ignore the signal if the exit reason is normal, or go into an - * exiting state (status P_EXITING). When a process has gone into the + * exiting state (ERTS_PSFLG_EXITING). When a process has gone into the * exiting state it will not execute any more Erlang code, but it might * take a while before it actually exits. The exit signal is being * received when the 'EXIT' message is put in the message queue, the @@ -8138,6 +8340,7 @@ send_exit_signal(Process *c_p, /* current process if and only Uint32 flags /* flags */ ) { + erts_aint32_t state = erts_smp_atomic32_read_nob(&rp->state); Eterm rsn = reason == am_kill ? am_killed : reason; ERTS_SMP_LC_ASSERT(*rp_locks == erts_proc_lc_my_proc_locks(rp)); @@ -8159,7 +8362,7 @@ send_exit_signal(Process *c_p, /* current process if and only } #endif - if (ERTS_PROC_IS_TRAPPING_EXITS(rp) + if ((state & ERTS_PSFLG_TRAP_EXIT) && (reason != am_kill || (flags & ERTS_XSIG_FLG_IGN_KILL))) { if (is_not_nil(token) #ifdef USE_VM_PROBES @@ -8175,9 +8378,7 @@ send_exit_signal(Process *c_p, /* current process if and only } else if (reason != am_normal || (flags & ERTS_XSIG_FLG_NO_IGN_NORMAL)) { #ifdef ERTS_SMP - if (!ERTS_PROC_PENDING_EXIT(rp) && !rp->is_exiting) { - ASSERT(rp->status != P_EXITING); - ASSERT(rp->status != P_FREE); + if (!(state & (ERTS_PSFLG_EXITING|ERTS_PSFLG_PENDING_EXIT))) { ASSERT(!rp->pending_exit.bp); if (rp == c_p && (*rp_locks & ERTS_PROC_LOCK_MAIN)) { @@ -8193,9 +8394,9 @@ send_exit_signal(Process *c_p, /* current process if and only } *rp_locks = ERTS_PROC_LOCKS_ALL; } - set_proc_exiting(c_p, rsn, NULL); + set_proc_exiting(c_p, state, rsn, NULL); } - else if (!(rp->status_flags & ERTS_PROC_SFLG_RUNNING)) { + else if (!(state & ERTS_PSFLG_RUNNING)) { /* Process not running ... */ ErtsProcLocks need_locks = ~(*rp_locks) & ERTS_PROC_LOCKS_ALL; if (need_locks @@ -8212,6 +8413,7 @@ send_exit_signal(Process *c_p, /* current process if and only /* ...and we have all locks on it... */ *rp_locks = ERTS_PROC_LOCKS_ALL; set_proc_exiting(rp, + state, (is_immed(rsn) ? rsn : copy_object(rsn, rp)), @@ -8241,11 +8443,9 @@ send_exit_signal(Process *c_p, /* current process if and only &bp->off_heap); rp->pending_exit.bp = bp; } - ASSERT(ERTS_PROC_PENDING_EXIT(rp)); + erts_smp_atomic32_read_bor_relb(&rp->state, + ERTS_PSFLG_PENDING_EXIT); } - if (!(rp->status_flags - & (ERTS_PROC_SFLG_INRUNQ|ERTS_PROC_SFLG_RUNNING))) - erts_add_to_runq(rp); } /* else: * @@ -8257,17 +8457,14 @@ send_exit_signal(Process *c_p, /* current process if and only * exit or by itself before seeing the pending exit. */ #else /* !ERTS_SMP */ - if (c_p == rp) { - rp->status = P_EXITING; - c_p->fvalue = rsn; - } - else if (rp->status != P_EXITING) { /* No recursive process exits /PaN */ - Eterm old_status = rp->status; + erts_aint32_t state = erts_smp_atomic32_read_nob(&rp->state); + if (!(state & ERTS_PSFLG_EXITING)) { set_proc_exiting(rp, - is_immed(rsn) ? rsn : copy_object(rsn, rp), + state, + (is_immed(rsn) || c_p == rp + ? rsn + : copy_object(rsn, rp)), NULL); - if (old_status != P_RUNABLE && old_status != P_RUNNING) - erts_add_to_runq(rp); } #endif return -1; /* Receiver will exit */ @@ -8570,12 +8767,14 @@ resume_suspend_monitor(ErtsSuspendMonitor *smon, void *vc_p) erts_destroy_suspend_monitor(smon); } -static void -continue_exit_process(Process *p #ifdef ERTS_SMP - , erts_pix_lock_t *pix_lock +static void +proc_dec_refc(void *vproc) +{ + erts_smp_proc_dec_refc((Process *) vproc); +} #endif - ); + /* this function fishishes a process and propagates exit messages - called by process_main when a process dies */ @@ -8583,9 +8782,8 @@ void erts_do_exit_process(Process* p, Eterm reason) { #ifdef ERTS_SMP - erts_pix_lock_t *pix_lock = ERTS_PID2PIXLOCK(p->id); + erts_aint32_t state; #endif - p->arity = 0; /* No live registers */ p->fvalue = reason; @@ -8603,27 +8801,17 @@ erts_do_exit_process(Process* p, Eterm reason) #ifdef ERTS_SMP ERTS_SMP_CHK_HAVE_ONLY_MAIN_PROC_LOCK(p); /* By locking all locks (main lock is already locked) when going - to status P_EXITING, it is enough to take any lock when + to exiting state (ERTS_PSFLG_EXITING), it is enough to take any lock when looking up a process (erts_pid2proc()) to prevent the looked up process from exiting until the lock has been released. */ erts_smp_proc_lock(p, ERTS_PROC_LOCKS_ALL_MINOR); #endif - - if (erts_system_profile_flags.runnable_procs && (p->status != P_WAITING)) { - profile_runnable_proc(p, am_inactive); - } - -#ifdef ERTS_SMP - erts_pix_lock(pix_lock); - p->is_exiting = 1; -#endif - - p->status = P_EXITING; -#ifdef ERTS_SMP - erts_pix_unlock(pix_lock); - - if (ERTS_PROC_PENDING_EXIT(p)) { +#ifndef ERTS_SMP + set_proc_exiting_state(p, erts_smp_atomic32_read_nob(&p->state)); +#else + state = set_proc_exiting_state(p, erts_smp_atomic32_read_nob(&p->state)); + if (state & ERTS_PSFLG_PENDING_EXIT) { /* Process exited before pending exit was received... */ p->pending_exit.reason = THE_NON_VALUE; if (p->pending_exit.bp) { @@ -8662,29 +8850,11 @@ erts_do_exit_process(Process* p, Eterm reason) erts_smp_proc_unlock(p, ERTS_PROC_LOCKS_ALL_MINOR); -#ifdef ERTS_SMP - continue_exit_process(p, pix_lock); -#else - continue_exit_process(p); -#endif + erts_continue_exit_process(p); } void -erts_continue_exit_process(Process *c_p) -{ -#ifdef ERTS_SMP - continue_exit_process(c_p, ERTS_PID2PIXLOCK(c_p->id)); -#else - continue_exit_process(c_p); -#endif -} - -static void -continue_exit_process(Process *p -#ifdef ERTS_SMP - , erts_pix_lock_t *pix_lock -#endif - ) +erts_continue_exit_process(Process *p) { ErtsLink* lnk; ErtsMonitor *mon; @@ -8700,11 +8870,7 @@ continue_exit_process(Process *p ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_MAIN == erts_proc_lc_my_proc_locks(p)); -#ifdef DEBUG - erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); - ASSERT(p->status == P_EXITING); - erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); -#endif + ASSERT(ERTS_PROC_IS_EXITING(p)); #ifdef ERTS_SMP if (p->flags & F_HAVE_BLCKD_MSCHED) { @@ -8772,48 +8938,47 @@ continue_exit_process(Process *p #endif { + int maybe_save; int pix; /* Do *not* use erts_get_runq_proc() */ ErtsRunQueue *rq; rq = erts_get_runq_current(ERTS_GET_SCHEDULER_DATA_FROM_PROC(p)); - ASSERT(internal_pid_index(p->id) < erts_max_processes); pix = internal_pid_index(p->id); - erts_smp_mtx_lock(&proc_tab_mtx); + erts_smp_rwmtx_rlock(&erts_proc_tab_rwmtx); + maybe_save = saved_term_procs.end != NULL; + if (maybe_save) { + erts_smp_rwmtx_runlock(&erts_proc_tab_rwmtx); + erts_smp_rwmtx_rwlock(&erts_proc_tab_rwmtx); + } + erts_smp_runq_lock(rq); #ifdef ERTS_SMP - erts_pix_lock(pix_lock); - ASSERT(p->scheduler_data); ASSERT(p->scheduler_data->current_process == p); ASSERT(p->scheduler_data->free_process == NULL); p->scheduler_data->current_process = NULL; p->scheduler_data->free_process = p; - p->status_flags = 0; #endif - process_tab[pix] = NULL; /* Time of death! */ + /* Time of death! */ + erts_smp_atomic_set_relb(&erts_proc.tab[pix], ERTS_AINT_NULL); + ASSERT(erts_smp_atomic32_read_nob(&process_count) > 0); - erts_smp_atomic32_dec_nob(&process_count); + erts_smp_atomic32_dec_relb(&process_count); -#ifdef ERTS_SMP - erts_pix_unlock(pix_lock); -#endif erts_smp_runq_unlock(rq); - if (p_next < 0) { - if (p_last >= p_next) { - p_serial++; - p_serial &= p_serial_mask; - } - p_next = pix; + if (!maybe_save) + erts_smp_rwmtx_runlock(&erts_proc_tab_rwmtx); + else { + if (saved_term_procs.end) + save_terminating_process(p); + erts_smp_rwmtx_rwunlock(&erts_proc_tab_rwmtx); } - ERTS_MAYBE_SAVE_TERMINATING_PROCESS(p); - - erts_smp_mtx_unlock(&proc_tab_mtx); } /* @@ -8828,7 +8993,21 @@ continue_exit_process(Process *p lnk = p->nlinks; p->nlinks = NULL; - p->status = P_FREE; + + { + /* Inactivate and notify free */ + erts_aint32_t n, e, a = erts_smp_atomic32_read_nob(&p->state); + while (1) { + n = e = a; + ASSERT(a & ERTS_PSFLG_EXITING); + n |= ERTS_PSFLG_FREE; + n &= ~ERTS_PSFLG_ACTIVE; + a = erts_smp_atomic32_cmpxchg_mb(&p->state, n, e); + if (a == e) + break; + } + } + dep = ((p->flags & F_DISTRIBUTION) ? ERTS_PROC_SET_DIST_ENTRY(p, ERTS_PROC_LOCKS_ALL, NULL) : NULL); @@ -8883,8 +9062,25 @@ continue_exit_process(Process *p delete_process(p); +#ifdef ERTS_SMP + /* + * Each scheduler will decrease refc by one via misc aux work; + * we have one refc for reference from process table which we + * now want to remove, i.e. we increase refc with schedulers-1. + * + * Process struct wont be deallocated until (earliest) when + * all schedulers have decreased refc via misc aux work... + */ + if (erts_no_schedulers != 1) + erts_smp_proc_add_refc(p, (Sint32) erts_no_schedulers-1); + erts_schedule_multi_misc_aux_work(0, + erts_no_schedulers, + proc_dec_refc, + (void *) p); + erts_smp_proc_lock(p, ERTS_PROC_LOCK_MAIN); ERTS_SMP_CHK_HAVE_ONLY_MAIN_PROC_LOCK(p); +#endif return; @@ -8897,8 +9093,6 @@ continue_exit_process(Process *p ERTS_SMP_LC_ASSERT(curr_locks == erts_proc_lc_my_proc_locks(p)); ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_MAIN & curr_locks); - ASSERT(p->status == P_EXITING); - p->i = (BeamInstr *) beam_continue_exit; if (!(curr_locks & ERTS_PROC_LOCK_STATUS)) { @@ -8906,8 +9100,6 @@ continue_exit_process(Process *p curr_locks |= ERTS_PROC_LOCK_STATUS; } - erts_add_to_runq(p); - if (curr_locks != ERTS_PROC_LOCK_MAIN) erts_smp_proc_unlock(p, ~ERTS_PROC_LOCK_MAIN & curr_locks); @@ -8919,33 +9111,15 @@ continue_exit_process(Process *p static void timeout_proc(Process* p) { + erts_aint32_t state; BeamInstr** pi = (BeamInstr **) p->def_arg_reg; p->i = *pi; p->flags |= F_TIMO; p->flags &= ~F_INSLPQUEUE; - switch (p->status) { - case P_GARBING: - switch (p->gcstatus) { - case P_SUSPENDED: - goto suspended; - case P_WAITING: - goto waiting; - default: - break; - } - break; - case P_WAITING: - waiting: - erts_add_to_runq(p); - break; - case P_SUSPENDED: - suspended: - p->rstatus = P_RUNABLE; /* MUST set resume status to runnable */ - break; - default: - break; - } + state = erts_smp_atomic32_read_acqb(&p->state); + if (!(state & ERTS_PSFLG_ACTIVE)) + schedule_process(p, state, 0); } @@ -9013,6 +9187,7 @@ erts_stack_dump(int to, void *to_arg, Process *p) void erts_program_counter_info(int to, void *to_arg, Process *p) { + erts_aint32_t state; int i; erts_print(to, to_arg, "Program counter: %p (", p->i); @@ -9021,7 +9196,8 @@ erts_program_counter_info(int to, void *to_arg, Process *p) erts_print(to, to_arg, "CP: %p (", p->cp); print_function_from_pc(to, to_arg, p->cp); erts_print(to, to_arg, ")\n"); - if (!((p->status == P_RUNNING) || (p->status == P_GARBING))) { + state = erts_smp_atomic32_read_acqb(&p->state); + if (!(state & (ERTS_PSFLG_RUNNING|ERTS_PSFLG_GC))) { erts_print(to, to_arg, "arity = %d\n",p->arity); if (!ERTS_IS_CRASH_DUMPING) { /* @@ -9194,13 +9370,13 @@ do { \ #endif #if ERTS_PROCESSES_BIF_DEBUGLEVEL >= ERTS_PROCS_DBGLVL_CHK_FOUND_PIDS -# define ERTS_PROCS_DBG_CHK_PID_FOUND(PBDP, PID, TVP) \ - debug_processes_check_found_pid((PBDP), (PID), (TVP), 1) -# define ERTS_PROCS_DBG_CHK_PID_NOT_FOUND(PBDP, PID, TVP) \ - debug_processes_check_found_pid((PBDP), (PID), (TVP), 0) +# define ERTS_PROCS_DBG_CHK_PID_FOUND(PBDP, PID, IC) \ + debug_processes_check_found_pid((PBDP), (PID), (IC), 1) +# define ERTS_PROCS_DBG_CHK_PID_NOT_FOUND(PBDP, PID, IC) \ + debug_processes_check_found_pid((PBDP), (PID), (IC), 0) #else -# define ERTS_PROCS_DBG_CHK_PID_FOUND(PBDP, PID, TVP) -# define ERTS_PROCS_DBG_CHK_PID_NOT_FOUND(PBDP, PID, TVP) +# define ERTS_PROCS_DBG_CHK_PID_FOUND(PBDP, PID, IC) +# define ERTS_PROCS_DBG_CHK_PID_NOT_FOUND(PBDP, PID, IC) #endif #if ERTS_PROCESSES_BIF_DEBUGLEVEL >= ERTS_PROCS_DBGLVL_CHK_TERM_PROC_LIST @@ -9245,7 +9421,7 @@ static Uint processes_bif_tab_chunks; static Export processes_trap_export; typedef struct { - SysTimeval time; + Uint64 interval; } ErtsProcessesBifChunkInfo; typedef enum { @@ -9270,7 +9446,7 @@ typedef struct { struct { Eterm caller; #if ERTS_PROCESSES_BIF_DEBUGLEVEL >= ERTS_PROCS_DBGLVL_CHK_FOUND_PIDS - SysTimeval *pid_started; + Uint64 *pid_started; #endif #if ERTS_PROCESSES_BIF_DEBUGLEVEL >= ERTS_PROCS_DBGLVL_CHK_HALLOC Eterm *heap; @@ -9299,11 +9475,10 @@ static void debug_processes_verify_all_pids(ErtsProcessesBifData *pbdp); #if ERTS_PROCESSES_BIF_DEBUGLEVEL >= ERTS_PROCS_DBGLVL_CHK_FOUND_PIDS static void debug_processes_check_found_pid(ErtsProcessesBifData *pbdp, Eterm pid, - SysTimeval *started, + Uint64 ic, int pid_should_be_found); #endif #if ERTS_PROCESSES_BIF_DEBUGLEVEL >= ERTS_PROCS_DBGLVL_CHK_TERM_PROC_LIST -static SysTimeval debug_tv_start; static void debug_processes_check_term_proc_list(void); static void debug_processes_check_term_proc_free_list(ErtsTermProcElement *tpep); #endif @@ -9314,7 +9489,7 @@ save_terminating_process(Process *p) ErtsTermProcElement *tpep = erts_alloc(ERTS_ALC_T_PROCS_TPROC_EL, sizeof(ErtsTermProcElement)); ERTS_PROCS_ASSERT(saved_term_procs.start && saved_term_procs.end); - ERTS_SMP_LC_ASSERT(erts_lc_mtx_is_locked(&proc_tab_mtx)); + ERTS_SMP_LC_ASSERT(erts_lc_rwmtx_is_rwlocked(&erts_proc_tab_rwmtx)); ERTS_PROCS_DBG_CHK_TPLIST(); @@ -9322,19 +9497,19 @@ save_terminating_process(Process *p) tpep->next = NULL; tpep->ix = internal_pid_index(p->id); tpep->u.process.pid = p->id; - tpep->u.process.spawned = p->started; - erts_get_emu_time(&tpep->u.process.exited); + tpep->u.process.spawned = p->started_interval; + tpep->u.process.exited = get_proc_interval(); saved_term_procs.end->next = tpep; saved_term_procs.end = tpep; ERTS_PROCS_DBG_CHK_TPLIST(); - ERTS_PROCS_ASSERT((tpep->prev->ix >= 0 - ? erts_cmp_timeval(&tpep->u.process.exited, - &tpep->prev->u.process.exited) - : erts_cmp_timeval(&tpep->u.process.exited, - &tpep->prev->u.bif_invocation.time)) > 0); + ERTS_PROCS_ASSERT(tpep->prev->ix >= 0 + ? (tpep->u.process.exited + >= tpep->prev->u.process.exited) + : (tpep->u.process.exited + >= tpep->prev->u.bif_invocation.interval)); } static void @@ -9365,7 +9540,7 @@ cleanup_processes_bif_data(Binary *bp) if (pbdp->bif_invocation) { ErtsTermProcElement *tpep; - erts_smp_mtx_lock(&proc_tab_mtx); + erts_smp_rwmtx_rwlock(&erts_proc_tab_rwmtx); ERTS_PROCS_DBG_TRACE(pbdp->debug.caller, cleanup_processes_bif_data, @@ -9419,7 +9594,7 @@ cleanup_processes_bif_data(Binary *bp) ERTS_PROCS_DBG_CHK_TPLIST(); - erts_smp_mtx_unlock(&proc_tab_mtx); + erts_smp_rwmtx_rwunlock(&erts_proc_tab_rwmtx); } } @@ -9447,7 +9622,7 @@ processes_bif_engine(Process *p, Eterm *res_accp, Binary *mbp) pbdp->tix = 0; pbdp->pid_ix = 0; - erts_smp_mtx_lock(&proc_tab_mtx); + erts_smp_rwmtx_rwlock(&erts_proc_tab_rwmtx); locked = 1; ERTS_PROCS_DBG_TRACE(p->id, processes_bif_engine, init); @@ -9458,7 +9633,7 @@ processes_bif_engine(Process *p, Eterm *res_accp, Binary *mbp) #if ERTS_PROCESSES_BIF_DEBUGLEVEL >= ERTS_PROCS_DBGLVL_CHK_FOUND_PIDS pbdp->debug.pid_started = erts_alloc(ERTS_ALC_T_PROCS_PIDS, - sizeof(SysTimeval)*pbdp->pid_sz); + sizeof(Uint64)*pbdp->pid_sz); #endif ERTS_PROCS_DBG_SAVE_PIDS(pbdp); @@ -9473,7 +9648,8 @@ processes_bif_engine(Process *p, Eterm *res_accp, Binary *mbp) pbdp->bif_invocation = erts_alloc(ERTS_ALC_T_PROCS_TPROC_EL, sizeof(ErtsTermProcElement)); pbdp->bif_invocation->ix = -1; - erts_get_emu_time(&pbdp->bif_invocation->u.bif_invocation.time); + pbdp->bif_invocation->u.bif_invocation.interval + = step_proc_interval(); ERTS_PROCS_DBG_CHK_TPLIST(); pbdp->bif_invocation->next = NULL; @@ -9500,30 +9676,31 @@ processes_bif_engine(Process *p, Eterm *res_accp, Binary *mbp) int indices = ERTS_PROCESSES_BIF_TAB_CHUNK_SIZE; int cix = ix / ERTS_PROCESSES_BIF_TAB_CHUNK_SIZE; int end_ix = ix + indices; - SysTimeval *invocation_timep; + Uint64 *invocation_interval_p; - invocation_timep = (pbdp->bif_invocation - ? &pbdp->bif_invocation->u.bif_invocation.time - : NULL); + invocation_interval_p + = (pbdp->bif_invocation + ? &pbdp->bif_invocation->u.bif_invocation.interval + : NULL); ERTS_PROCS_ASSERT(is_nil(*res_accp)); if (!locked) { - erts_smp_mtx_lock(&proc_tab_mtx); + erts_smp_rwmtx_rwlock(&erts_proc_tab_rwmtx); locked = 1; } - ERTS_SMP_LC_ASSERT(erts_lc_mtx_is_locked(&proc_tab_mtx)); + ERTS_SMP_LC_ASSERT(erts_lc_rwmtx_is_rwlocked(&erts_proc_tab_rwmtx)); ERTS_PROCS_DBG_TRACE(p->id, processes_bif_engine, insp_table); if (cix != 0) - erts_get_emu_time(&pbdp->chunk[cix].time); + pbdp->chunk[cix].interval = step_proc_interval(); else if (pbdp->bif_invocation) - pbdp->chunk[0].time = *invocation_timep; - /* else: Time is irrelevant */ + pbdp->chunk[0].interval = *invocation_interval_p; + /* else: interval is irrelevant */ - if (end_ix >= erts_max_processes) { + if (end_ix >= erts_proc.max) { ERTS_PROCS_ASSERT(cix+1 == processes_bif_tab_chunks); - end_ix = erts_max_processes; + end_ix = erts_proc.max; indices = end_ix - ix; /* What to do when done with this chunk */ pbdp->state = (processes_bif_tab_chunks == 1 @@ -9532,16 +9709,15 @@ processes_bif_engine(Process *p, Eterm *res_accp, Binary *mbp) } for (; ix < end_ix; ix++) { - Process *rp = process_tab[ix]; + Process *rp = erts_pix2proc(ix); if (rp - && (!invocation_timep - || erts_cmp_timeval(&rp->started, - invocation_timep) < 0)) { + && (!invocation_interval_p + || rp->started_interval < *invocation_interval_p)) { ERTS_PROCS_ASSERT(is_internal_pid(rp->id)); pbdp->pid[pbdp->pid_ix] = rp->id; #if ERTS_PROCESSES_BIF_DEBUGLEVEL >= ERTS_PROCS_DBGLVL_CHK_FOUND_PIDS - pbdp->debug.pid_started[pbdp->pid_ix] = rp->started; + pbdp->debug.pid_started[pbdp->pid_ix] = rp->started_interval; #endif pbdp->pid_ix++; @@ -9551,7 +9727,7 @@ processes_bif_engine(Process *p, Eterm *res_accp, Binary *mbp) pbdp->tix = end_ix; - erts_smp_mtx_unlock(&proc_tab_mtx); + erts_smp_rwmtx_rwunlock(&erts_proc_tab_rwmtx); locked = 0; reds = indices/ERTS_PROCESSES_BIF_TAB_INSPECT_INDICES_PER_RED; @@ -9563,8 +9739,8 @@ processes_bif_engine(Process *p, Eterm *res_accp, Binary *mbp) ix = pbdp->tix; indices = ERTS_PROCESSES_BIF_TAB_CHUNK_SIZE; end_ix = ix + indices; - if (end_ix > erts_max_processes) { - end_ix = erts_max_processes; + if (end_ix > erts_proc.max) { + end_ix = erts_proc.max; indices = end_ix - ix; } @@ -9583,20 +9759,20 @@ processes_bif_engine(Process *p, Eterm *res_accp, Binary *mbp) int i; int max_reds; int free_term_procs = 0; - SysTimeval *invocation_timep; + Uint64 invocation_interval; ErtsTermProcElement *tpep; ErtsTermProcElement *free_list = NULL; tpep = pbdp->bif_invocation; ERTS_PROCS_ASSERT(tpep); - invocation_timep = &tpep->u.bif_invocation.time; + invocation_interval = tpep->u.bif_invocation.interval; max_reds = have_reds = ERTS_BIF_REDS_LEFT(p); if (max_reds > ERTS_PROCESSES_INSPECT_TERM_PROC_MAX_REDS) max_reds = ERTS_PROCESSES_INSPECT_TERM_PROC_MAX_REDS; reds = 0; - erts_smp_mtx_lock(&proc_tab_mtx); + erts_smp_rwmtx_rwlock(&erts_proc_tab_rwmtx); ERTS_PROCS_DBG_TRACE(p->id, processes_bif_engine, insp_term_procs); ERTS_PROCS_DBG_CHK_TPLIST(); @@ -9635,20 +9811,19 @@ processes_bif_engine(Process *p, Eterm *res_accp, Binary *mbp) } else { int cix = tpep->ix/ERTS_PROCESSES_BIF_TAB_CHUNK_SIZE; - SysTimeval *chunk_timep = &pbdp->chunk[cix].time; + Uint64 chunk_interval = pbdp->chunk[cix].interval; Eterm pid = tpep->u.process.pid; ERTS_PROCS_ASSERT(is_internal_pid(pid)); - if (erts_cmp_timeval(&tpep->u.process.spawned, - invocation_timep) < 0) { - if (erts_cmp_timeval(&tpep->u.process.exited, - chunk_timep) < 0) { + if (tpep->u.process.spawned < invocation_interval) { + if (tpep->u.process.exited < chunk_interval) { ERTS_PROCS_DBG_CHK_PID_NOT_FOUND(pbdp, pid, - &tpep->u.process.spawned); + tpep->u.process.spawned); pbdp->pid[pbdp->pid_ix] = pid; #if ERTS_PROCESSES_BIF_DEBUGLEVEL >= ERTS_PROCS_DBGLVL_CHK_FOUND_PIDS - pbdp->debug.pid_started[pbdp->pid_ix] = tpep->u.process.spawned; + pbdp->debug.pid_started[pbdp->pid_ix] + = tpep->u.process.spawned; #endif pbdp->pid_ix++; ERTS_PROCS_ASSERT(pbdp->pid_ix <= pbdp->pid_sz); @@ -9656,13 +9831,13 @@ processes_bif_engine(Process *p, Eterm *res_accp, Binary *mbp) else { ERTS_PROCS_DBG_CHK_PID_FOUND(pbdp, pid, - &tpep->u.process.spawned); + tpep->u.process.spawned); } } else { ERTS_PROCS_DBG_CHK_PID_NOT_FOUND(pbdp, pid, - &tpep->u.process.spawned); + tpep->u.process.spawned); } i++; @@ -9711,7 +9886,7 @@ processes_bif_engine(Process *p, Eterm *res_accp, Binary *mbp) ERTS_PROCS_DBG_CHK_TPLIST(); ERTS_PROCS_DBG_CHK_FREELIST(free_list); - erts_smp_mtx_unlock(&proc_tab_mtx); + erts_smp_rwmtx_rwunlock(&erts_proc_tab_rwmtx); /* * We do the actual free of term proc structures now when we @@ -9771,8 +9946,9 @@ processes_bif_engine(Process *p, Eterm *res_accp, Binary *mbp) sizeof(Eterm)*pbdp->pid_sz); #if ERTS_PROCESSES_BIF_DEBUGLEVEL >= ERTS_PROCS_DBGLVL_CHK_FOUND_PIDS pbdp->debug.pid_started = erts_realloc(ERTS_ALC_T_PROCS_PIDS, - pbdp->debug.pid_started, - sizeof(SysTimeval)*pbdp->pid_sz); + pbdp->debug.pid_started, + (sizeof(Uint64) + * pbdp->pid_sz)); #endif } reds = conses/ERTS_PROCESSES_BIF_BUILD_RESULT_CONSES_PER_RED; @@ -9892,22 +10068,13 @@ init_processes_bif(void) { saved_term_procs.start = NULL; saved_term_procs.end = NULL; - processes_bif_tab_chunks = (((erts_max_processes - 1) + processes_bif_tab_chunks = (((erts_proc.max - 1) / ERTS_PROCESSES_BIF_TAB_CHUNK_SIZE) + 1); /* processes_trap/2 is a hidden BIF that the processes/0 BIF traps to. */ - sys_memset((void *) &processes_trap_export, 0, sizeof(Export)); - processes_trap_export.address = &processes_trap_export.code[3]; - processes_trap_export.code[0] = am_erlang; - processes_trap_export.code[1] = am_processes_trap; - processes_trap_export.code[2] = 2; - processes_trap_export.code[3] = (BeamInstr) em_apply_bif; - processes_trap_export.code[4] = (BeamInstr) &processes_trap; - -#if ERTS_PROCESSES_BIF_DEBUGLEVEL >= ERTS_PROCS_DBGLVL_CHK_TERM_PROC_LIST - erts_get_emu_time(&debug_tv_start); -#endif + erts_init_trap_export(&processes_trap_export, am_erlang, am_processes_trap, 2, + &processes_trap); } @@ -9940,31 +10107,29 @@ erts_debug_processes(Process *c_p) Eterm res; Eterm* hp; Process *p; -#ifdef DEBUG Eterm *hp_end; -#endif - erts_smp_mtx_lock(&proc_tab_mtx); + erts_smp_rwmtx_rwlock(&erts_proc_tab_rwmtx); res = NIL; need = erts_process_count() * 2; hp = HAlloc(c_p, need); /* we need two heap words for each pid */ -#ifdef DEBUG hp_end = hp + need; -#endif /* make the list by scanning bakward */ - for (i = erts_max_processes-1; i >= 0; i--) { - if ((p = process_tab[i]) != NULL) { - res = CONS(hp, process_tab[i]->id, res); + for (i = erts_proc.max-1; i >= 0; i--) { + p = erts_pix2proc(i); + if (p) { + res = CONS(hp, p->id, res); hp += 2; } } - ASSERT(hp == hp_end); - erts_smp_mtx_unlock(&proc_tab_mtx); + erts_smp_rwmtx_rwunlock(&erts_proc_tab_rwmtx); + + HRelease(c_p, hp_end, hp); return res; } @@ -9996,14 +10161,12 @@ erts_debug_processes_bif_info(Process *c_p) static void debug_processes_check_found_pid(ErtsProcessesBifData *pbdp, Eterm pid, - SysTimeval *tvp, + Uint64 ic, int pid_should_be_found) { int i; for (i = 0; i < pbdp->pid_ix; i++) { - if (pbdp->pid[i] == pid - && pbdp->debug.pid_started[i].tv_sec == tvp->tv_sec - && pbdp->debug.pid_started[i].tv_usec == tvp->tv_usec) { + if (pbdp->pid[i] == pid && pbdp->debug.pid_started[i] == ic) { ERTS_PROCS_ASSERT(pid_should_be_found); return; } @@ -10037,8 +10200,8 @@ debug_processes_save_all_pids(ErtsProcessesBifData *pbdp) pbdp->debug.correct_pids = erts_alloc(ERTS_ALC_T_PROCS_PIDS, sizeof(Eterm)*pbdp->pid_sz); - for (tix = 0, cpix = 0; tix < erts_max_processes; tix++) { - Process *rp = process_tab[tix]; + for (tix = 0, cpix = 0; tix < erts_proc.max; tix++) { + Process *rp = erts_pix2proc(tix); if (rp) { ERTS_PROCS_ASSERT(is_internal_pid(rp->id)); pbdp->debug.correct_pids[cpix++] = rp->id; @@ -10091,14 +10254,13 @@ debug_processes_verify_all_pids(ErtsProcessesBifData *pbdp) static void debug_processes_check_term_proc_list(void) { - ERTS_SMP_LC_ASSERT(erts_lc_mtx_is_locked(&proc_tab_mtx)); + ERTS_SMP_LC_ASSERT(erts_lc_rwmtx_is_rwlocked(&erts_proc_tab_rwmtx)); if (!saved_term_procs.start) ERTS_PROCS_ASSERT(!saved_term_procs.end); else { - SysTimeval tv_now; - SysTimeval *prev_xtvp = NULL; + Uint64 curr_interval = get_proc_interval(); + Uint64 *prev_x_interval_p = NULL; ErtsTermProcElement *tpep; - erts_get_emu_time(&tv_now); for (tpep = saved_term_procs.start; tpep; tpep = tpep->next) { if (!tpep->prev) @@ -10110,20 +10272,17 @@ debug_processes_check_term_proc_list(void) else ERTS_PROCS_ASSERT(tpep->next->prev == tpep); if (tpep->ix < 0) { - SysTimeval *tvp = &tpep->u.bif_invocation.time; - ERTS_PROCS_ASSERT(erts_cmp_timeval(&debug_tv_start, tvp) < 0 - && erts_cmp_timeval(tvp, &tv_now) < 0); + Uint64 interval = tpep->u.bif_invocation.interval; + ERTS_PROCS_ASSERT(interval <= curr_interval); } else { - SysTimeval *stvp = &tpep->u.process.spawned; - SysTimeval *xtvp = &tpep->u.process.exited; + Uint64 s_interval = tpep->u.process.spawned; + Uint64 x_interval = tpep->u.process.exited; - ERTS_PROCS_ASSERT(erts_cmp_timeval(&debug_tv_start, - stvp) < 0); - ERTS_PROCS_ASSERT(erts_cmp_timeval(stvp, xtvp) < 0); - if (prev_xtvp) - ERTS_PROCS_ASSERT(erts_cmp_timeval(prev_xtvp, xtvp) < 0); - prev_xtvp = xtvp; + ERTS_PROCS_ASSERT(s_interval <= x_interval); + if (prev_x_interval_p) + ERTS_PROCS_ASSERT(*prev_x_interval_p <= x_interval); + prev_x_interval_p = &tpep->u.process.exited; ERTS_PROCS_ASSERT(is_internal_pid(tpep->u.process.pid)); ERTS_PROCS_ASSERT(tpep->ix == internal_pid_index(tpep->u.process.pid)); diff --git a/erts/emulator/beam/erl_process.h b/erts/emulator/beam/erl_process.h index 5b79c40d93..e9e5a3365f 100644 --- a/erts/emulator/beam/erl_process.h +++ b/erts/emulator/beam/erl_process.h @@ -112,28 +112,29 @@ extern int erts_sched_thread_suggested_stack_size; #define PRIORITY_NORMAL 2 #define PRIORITY_LOW 3 #define ERTS_NO_PROC_PRIO_LEVELS 4 +#define ERTS_NO_PROC_PRIO_QUEUES 3 #define ERTS_PORT_PRIO_LEVEL ERTS_NO_PROC_PRIO_LEVELS +#define ERTS_NO_PRIO_LEVELS (ERTS_NO_PROC_PRIO_LEVELS + 1) #define ERTS_RUNQ_FLGS_PROCS_QMASK \ ((((Uint32) 1) << ERTS_NO_PROC_PRIO_LEVELS) - 1) -#define ERTS_NO_PRIO_LEVELS (ERTS_NO_PROC_PRIO_LEVELS + 1) -#define ERTS_RUNQ_FLGS_MIGRATE_QMASK \ +#define ERTS_RUNQ_FLGS_QMASK \ ((((Uint32) 1) << ERTS_NO_PRIO_LEVELS) - 1) #define ERTS_RUNQ_FLGS_EMIGRATE_SHFT \ - ERTS_NO_PROC_PRIO_LEVELS + ERTS_NO_PRIO_LEVELS #define ERTS_RUNQ_FLGS_IMMIGRATE_SHFT \ (ERTS_RUNQ_FLGS_EMIGRATE_SHFT + ERTS_NO_PRIO_LEVELS) #define ERTS_RUNQ_FLGS_EVACUATE_SHFT \ (ERTS_RUNQ_FLGS_IMMIGRATE_SHFT + ERTS_NO_PRIO_LEVELS) #define ERTS_RUNQ_FLGS_EMIGRATE_QMASK \ - (ERTS_RUNQ_FLGS_MIGRATE_QMASK << ERTS_RUNQ_FLGS_EMIGRATE_SHFT) + (ERTS_RUNQ_FLGS_QMASK << ERTS_RUNQ_FLGS_EMIGRATE_SHFT) #define ERTS_RUNQ_FLGS_IMMIGRATE_QMASK \ - (ERTS_RUNQ_FLGS_MIGRATE_QMASK << ERTS_RUNQ_FLGS_IMMIGRATE_SHFT) + (ERTS_RUNQ_FLGS_QMASK << ERTS_RUNQ_FLGS_IMMIGRATE_SHFT) #define ERTS_RUNQ_FLGS_EVACUATE_QMASK \ - (ERTS_RUNQ_FLGS_MIGRATE_QMASK << ERTS_RUNQ_FLGS_EVACUATE_SHFT) + (ERTS_RUNQ_FLGS_QMASK << ERTS_RUNQ_FLGS_EVACUATE_SHFT) #define ERTS_RUNQ_FLG_BASE2 \ (ERTS_RUNQ_FLGS_EVACUATE_SHFT + ERTS_NO_PRIO_LEVELS) @@ -148,14 +149,18 @@ extern int erts_sched_thread_suggested_stack_size; (((Uint32) 1) << (ERTS_RUNQ_FLG_BASE2 + 3)) #define ERTS_RUNQ_FLG_INACTIVE \ (((Uint32) 1) << (ERTS_RUNQ_FLG_BASE2 + 4)) +#define ERTS_RUNQ_FLG_NONEMPTY \ + (((Uint32) 1) << (ERTS_RUNQ_FLG_BASE2 + 5)) +#define ERTS_RUNQ_FLG_PROTECTED \ + (((Uint32) 1) << (ERTS_RUNQ_FLG_BASE2 + 6)) #define ERTS_RUNQ_FLGS_MIGRATION_QMASKS \ (ERTS_RUNQ_FLGS_EMIGRATE_QMASK \ | ERTS_RUNQ_FLGS_IMMIGRATE_QMASK \ | ERTS_RUNQ_FLGS_EVACUATE_QMASK) + #define ERTS_RUNQ_FLGS_MIGRATION_INFO \ - (ERTS_RUNQ_FLGS_MIGRATION_QMASKS \ - | ERTS_RUNQ_FLG_INACTIVE \ + (ERTS_RUNQ_FLG_INACTIVE \ | ERTS_RUNQ_FLG_OUT_OF_WORK \ | ERTS_RUNQ_FLG_HALFTIME_OUT_OF_WORK) @@ -186,33 +191,45 @@ extern int erts_sched_thread_suggested_stack_size; #define ERTS_UNSET_RUNQ_FLG_EVACUATE(FLGS, PRIO) \ ((FLGS) &= ~ERTS_RUNQ_FLG_EVACUATE((PRIO))) -#define ERTS_RUNQ_IFLG_SUSPENDED (((erts_aint32_t) 1) << 0) -#define ERTS_RUNQ_IFLG_NONEMPTY (((erts_aint32_t) 1) << 1) - - -#ifdef DEBUG -# if defined(ARCH_64) && !HALFWORD_HEAP -# define ERTS_DBG_SET_INVALID_RUNQP(RQP, N) \ - (*((char **) &(RQP)) = (char *) (0xdeadbeefdead0003 | ((N) << 4))) -# define ERTS_DBG_VERIFY_VALID_RUNQP(RQP) \ -do { \ - ASSERT((RQP) != NULL); \ - ASSERT(((((Uint) (RQP)) & ((Uint) 0x3))) == ((Uint) 0)); \ - ASSERT((((Uint) (RQP)) & ~((Uint) 0xffff)) != ((Uint) 0xdeadbeefdead0000));\ -} while (0) -# else -# define ERTS_DBG_SET_INVALID_RUNQP(RQP, N) \ - (*((char **) &(RQP)) = (char *) (0xdead0003 | ((N) << 4))) -# define ERTS_DBG_VERIFY_VALID_RUNQP(RQP) \ -do { \ - ASSERT((RQP) != NULL); \ - ASSERT(((((UWord) (RQP)) & ((UWord) 1))) == ((UWord) 0)); \ - ASSERT((((UWord) (RQP)) & ~((UWord) 0xffff)) != ((UWord) 0xdead0000)); \ -} while (0) -# endif -#else -# define ERTS_DBG_SET_INVALID_RUNQP(RQP, N) -# define ERTS_DBG_VERIFY_VALID_RUNQP(RQP) +#define ERTS_RUNQ_FLGS_INIT(RQ, INIT) \ + erts_smp_atomic32_init_nob(&(RQ)->flags, (erts_aint32_t) (INIT)) +#define ERTS_RUNQ_FLGS_SET(RQ, FLGS) \ + ((Uint32) erts_smp_atomic32_read_bor_relb(&(RQ)->flags, \ + (erts_aint32_t) (FLGS))) +#define ERTS_RUNQ_FLGS_UNSET(RQ, FLGS) \ + ((Uint32) erts_smp_atomic32_read_band_relb(&(RQ)->flags, \ + (erts_aint32_t) ~(FLGS))) +#define ERTS_RUNQ_FLGS_GET(RQ) \ + ((Uint32) erts_smp_atomic32_read_acqb(&(RQ)->flags)) +#define ERTS_RUNQ_FLGS_GET_NOB(RQ) \ + ((Uint32) erts_smp_atomic32_read_nob(&(RQ)->flags)) +#define ERTS_RUNQ_FLGS_GET_MB(RQ) \ + ((Uint32) erts_smp_atomic32_read_mb(&(RQ)->flags)) +#define ERTS_RUNQ_FLGS_MASK_SET(RQ, MSK, FLGS) \ + ((Uint32) erts_smp_atomic32_mask_set_relb(&(RQ)->flags, \ + (erts_aint32_t) (MSK), \ + (erts_aint32_t) (FLGS))) + +ERTS_GLB_INLINE erts_aint32_t +erts_smp_atomic32_mask_set_relb(erts_smp_atomic32_t *a32p, + erts_aint32_t mask, + erts_aint32_t set); +#if ERTS_GLB_INLINE_INCL_FUNC_DEF +ERTS_GLB_INLINE erts_aint32_t +erts_smp_atomic32_mask_set_relb(erts_smp_atomic32_t *a32p, + erts_aint32_t mask, + erts_aint32_t set) +{ + erts_aint32_t act = erts_smp_atomic32_read_nob(a32p); + while (1) { + erts_aint32_t exp = act; + erts_aint32_t new = exp & ~mask; + new |= (mask & set); + act = erts_smp_atomic32_cmpxchg_relb(a32p, new, exp); + if (act == exp) + return act; + } +} #endif typedef enum { @@ -264,7 +281,8 @@ typedef enum { #define ERTS_SSI_AUX_WORK_CHECK_CHILDREN (((erts_aint32_t) 1) << 8) #define ERTS_SSI_AUX_WORK_SET_TMO (((erts_aint32_t) 1) << 9) #define ERTS_SSI_AUX_WORK_MSEG_CACHE_CHECK (((erts_aint32_t) 1) << 10) -#define ERTS_SSI_AUX_WORK_REAP_PORTS (((erts_aint32_t) 1) << 11) +#define ERTS_SSI_AUX_WORK_CODE_IX_ACTIVATION (((erts_aint32_t) 1) << 11) +#define ERTS_SSI_AUX_WORK_REAP_PORTS (((erts_aint32_t) 1) << 12) typedef struct ErtsSchedulerSleepInfo_ ErtsSchedulerSleepInfo; @@ -290,7 +308,7 @@ struct ErtsSchedulerSleepInfo_ { typedef struct ErtsProcList_ ErtsProcList; struct ErtsProcList_ { Eterm pid; - SysTimeval started; + Uint64 started_interval; ErtsProcList* next; }; @@ -311,21 +329,39 @@ typedef struct ErtsSchedulerData_ ErtsSchedulerData; typedef struct ErtsRunQueue_ ErtsRunQueue; typedef struct { - int len; - int max_len; + erts_smp_atomic32_t len; + erts_aint32_t max_len; int reds; +} ErtsRunQueueInfo; + +#ifdef ERTS_SMP + +typedef struct { + Uint32 flags; + ErtsRunQueue *misc_evac_runq; struct { struct { int this; int other; } limit; ErtsRunQueue *runq; - } migrate; -} ErtsRunQueueInfo; + Uint32 flags; + } prio[ERTS_NO_PRIO_LEVELS]; +} ErtsMigrationPath; + +typedef struct ErtsMigrationPaths_ ErtsMigrationPaths; + +struct ErtsMigrationPaths_ { + void *block; + ErtsMigrationPaths *next; + ErtsThrPrgrVal thr_prgr; + ErtsMigrationPath mpath[1]; +}; + +#endif /* ERTS_SMP */ struct ErtsRunQueue_ { int ix; - erts_smp_atomic32_t info_flags; erts_smp_mtx_t mtx; erts_smp_cnd_t cnd; @@ -333,19 +369,18 @@ struct ErtsRunQueue_ { ErtsSchedulerData *scheduler; int waiting; /* < 0 in sys schedule; > 0 on cnd variable */ int woken; - Uint32 flags; + erts_smp_atomic32_t flags; int check_balance_reds; int full_reds_history_sum; int full_reds_history[ERTS_FULL_REDS_HISTORY_SIZE]; int out_of_work_count; - int max_len; - int len; + erts_aint32_t max_len; + erts_aint32_t len; int wakeup_other; int wakeup_other_reds; int halt_in_progress; struct { - int len; ErtsProcList *pending_exiters; Uint context_switches; Uint reductions; @@ -360,7 +395,7 @@ struct ErtsRunQueue_ { struct { ErtsMiscOpList *start; ErtsMiscOpList *end; - ErtsRunQueue *evac_runq; + erts_smp_atomic_t evac_runq; } misc; struct { @@ -380,7 +415,7 @@ extern ErtsAlignedRunQueue *erts_aligned_run_queues; #define ERTS_PROC_REDUCTIONS_EXECUTED(RQ, PRIO, REDS, AREDS) \ do { \ (RQ)->procs.reductions += (AREDS); \ - (RQ)->procs.prio_info[p->prio].reds += (REDS); \ + (RQ)->procs.prio_info[(PRIO)].reds += (REDS); \ (RQ)->check_balance_reds -= (REDS); \ (RQ)->wakeup_other_reds += (AREDS); \ } while (0) @@ -431,6 +466,12 @@ typedef struct { void *queue; } async_ready; #endif +#ifdef ERTS_SMP + struct { + Process* code_stager; + ErtsThrPrgrVal thr_prgr; + } code_ix_activation; +#endif } ErtsAuxWorkData; struct ErtsSchedulerData_ { @@ -488,6 +529,90 @@ extern ErtsAlignedSchedulerData *erts_aligned_scheduler_data; extern ErtsSchedulerData *erts_scheduler_data; #endif +#if defined(ERTS_SMP) && defined(ERTS_ENABLE_LOCK_CHECK) +int erts_smp_lc_runq_is_locked(ErtsRunQueue *); +#endif + +#ifdef ERTS_INCLUDE_SCHEDULER_INTERNALS + +/* + * Run queue locked during modifications. We use atomic ops since + * other threads peek at values without run queue lock. + */ + +ERTS_GLB_INLINE void erts_smp_inc_runq_len(ErtsRunQueue *rq, ErtsRunQueueInfo *rqi, int prio); +ERTS_GLB_INLINE void erts_smp_dec_runq_len(ErtsRunQueue *rq, ErtsRunQueueInfo *rqi, int prio); +ERTS_GLB_INLINE void erts_smp_reset_max_len(ErtsRunQueue *rq, ErtsRunQueueInfo *rqi); + +#if ERTS_GLB_INLINE_INCL_FUNC_DEF + +ERTS_GLB_INLINE void +erts_smp_inc_runq_len(ErtsRunQueue *rq, ErtsRunQueueInfo *rqi, int prio) +{ + erts_aint32_t len; + + ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); + + len = erts_smp_atomic32_read_nob(&rqi->len); + ASSERT(len >= 0); + if (len == 0) { + ASSERT((erts_smp_atomic32_read_nob(&rq->flags) + & ((erts_aint32_t) (1 << prio))) == 0); + erts_smp_atomic32_read_bor_nob(&rq->flags, + (erts_aint32_t) (1 << prio)); + } + len++; + if (rqi->max_len < len) + rqi->max_len = len; + + erts_smp_atomic32_set_relb(&rqi->len, len); + + rq->len++; + if (rq->max_len < rq->len) + rq->max_len = len; + ASSERT(rq->len > 0); +} + +ERTS_GLB_INLINE void +erts_smp_dec_runq_len(ErtsRunQueue *rq, ErtsRunQueueInfo *rqi, int prio) +{ + erts_aint32_t len; + + ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); + + len = erts_smp_atomic32_read_nob(&rqi->len); + len--; + ASSERT(len >= 0); + if (len == 0) { + ASSERT((erts_smp_atomic32_read_nob(&rq->flags) + & ((erts_aint32_t) (1 << prio)))); + erts_smp_atomic32_read_band_nob(&rq->flags, + ~((erts_aint32_t) (1 << prio))); + } + erts_smp_atomic32_set_relb(&rqi->len, len); + + rq->len--; + ASSERT(rq->len >= 0); +} + +ERTS_GLB_INLINE void +erts_smp_reset_max_len(ErtsRunQueue *rq, ErtsRunQueueInfo *rqi) +{ + erts_aint32_t len; + + ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); + + len = erts_smp_atomic32_read_nob(&rqi->len); + ASSERT(rqi->max_len >= len); + rqi->max_len = len; +} + +#endif /* ERTS_GLB_INLINE_INCL_FUNC_DEF */ + +#define RUNQ_READ_LEN(X) erts_smp_atomic32_read_nob((X)) + +#endif /* ERTS_INCLUDE_SCHEDULER_INTERNALS */ + /* * Process Specific Data. * @@ -600,6 +725,8 @@ struct ErtsPendingSuspend_ { # define BIN_OLD_VHEAP(p) (p)->bin_old_vheap struct process { + Eterm id; /* The pid of this process + (need to be first in struct) */ /* All fields in the PCB that differs between different heap * architectures, have been moved to the end of this struct to * make sure that as few offsets as possible differ. Different @@ -642,13 +769,9 @@ struct process { * Number of reductions left to execute. * Only valid for the current process. */ - Uint32 status; /* process STATE */ - Uint32 gcstatus; /* process gc STATE */ - Uint32 rstatus; /* process resume STATE */ Uint32 rcount; /* suspend count */ - Eterm id; /* The pid of this process */ int prio; /* Priority of process */ - int skipped; /* Times a low prio process has been rescheduled */ + int schedule_count; /* Times left to reschedule a low prio process */ Uint reds; /* No of reductions for this process */ Eterm tracer_proc; /* If proc is traced, this is the tracer (can NOT be boxed) */ @@ -661,7 +784,6 @@ struct process { Eterm ftrace; /* Latest exception stack trace dump */ Process *next; /* Pointer to next process in run queue */ - Process *prev; /* Pointer to prev process in run queue */ struct reg_proc *reg; /* NULL iff not registered */ ErtsLink *nlinks; @@ -699,8 +821,8 @@ struct process { * Information mainly for post-mortem use (erl crash dump). */ Eterm parent; /* Pid of process that created this process. */ - SysTimeval started; /* Time when started. */ - + erts_approx_time_t approx_started; /* Time when started. */ + Uint64 started_interval; /* This is the place, where all fields that differs between memory * architectures, have gone to. @@ -731,19 +853,16 @@ struct process { void *exit_data; /* Misc data referred during termination */ } u; - ErtsRunQueue *bound_runq; + erts_smp_atomic32_t state; /* Process state flags (see ERTS_PSFLG_*) */ #ifdef ERTS_SMP erts_proc_lock_t lock; ErtsSchedulerData *scheduler_data; - int is_exiting; - Uint32 runq_flags; - Uint32 status_flags; ErlMessageInQueue msg_inq; Eterm suspendee; ErtsPendingSuspend *pending_suspenders; ErtsPendExit pending_exit; - ErtsRunQueue *run_queue; + erts_smp_atomic_t run_queue; #ifdef HIPE struct hipe_process_state_smp hipe_smp; #endif @@ -797,6 +916,29 @@ void erts_check_for_holes(Process* p); #define SEQ_TRACE_TOKEN(p) ((p)->seq_trace_token) +#if ERTS_NO_PROC_PRIO_LEVELS > 4 +# error "Need to increase ERTS_PSFLG_PRIO_SHIFT" +#endif + +#define ERTS_PSFLG_PRIO_SHIFT 2 + +#define ERTS_PSFLG_BIT(N) \ + (((erts_aint32_t) 1) << (ERTS_PSFLG_PRIO_SHIFT + (N))) + +#define ERTS_PSFLG_PRIO_MASK (ERTS_PSFLG_BIT(0) - 1) + +#define ERTS_PSFLG_FREE ERTS_PSFLG_BIT(0) +#define ERTS_PSFLG_EXITING ERTS_PSFLG_BIT(1) +#define ERTS_PSFLG_PENDING_EXIT ERTS_PSFLG_BIT(2) +#define ERTS_PSFLG_ACTIVE ERTS_PSFLG_BIT(3) +#define ERTS_PSFLG_IN_RUNQ ERTS_PSFLG_BIT(4) +#define ERTS_PSFLG_RUNNING ERTS_PSFLG_BIT(5) +#define ERTS_PSFLG_SUSPENDED ERTS_PSFLG_BIT(6) +#define ERTS_PSFLG_GC ERTS_PSFLG_BIT(7) +#define ERTS_PSFLG_BOUND ERTS_PSFLG_BIT(8) +#define ERTS_PSFLG_TRAP_EXIT ERTS_PSFLG_BIT(9) + + /* The sequential tracing token is a tuple of size 5: * * {Flags, Label, Serial, Sender} @@ -869,9 +1011,8 @@ Eterm* erts_heap_alloc(Process* p, Uint need, Uint xtra); Eterm* erts_set_hole_marker(Eterm* ptr, Uint sz); #endif -extern Process** process_tab; -extern Uint erts_max_processes; -extern Uint erts_process_tab_index_mask; +extern erts_smp_rwmtx_t erts_proc_tab_rwmtx; +extern erts_smp_atomic_t *erts_proc_tab; extern Uint erts_default_process_flags; extern erts_smp_rwmtx_t erts_cpu_bind_rwmtx; /* If any of the erts_system_monitor_* variables are set (enabled), @@ -899,17 +1040,13 @@ struct erts_system_profile_flags_t { unsigned int exclusive : 1; }; extern struct erts_system_profile_flags_t erts_system_profile_flags; - -#define INVALID_PID(p, pid) ((p) == NULL \ - || (p)->id != (pid) \ - || (p)->status == P_EXITING) #define IS_TRACED(p) ( (p)->tracer_proc != NIL ) #define ARE_TRACE_FLAGS_ON(p,tf) ( ((p)->trace_flags & (tf|F_SENSITIVE)) == (tf) ) #define IS_TRACED_FL(p,tf) ( IS_TRACED(p) && ARE_TRACE_FLAGS_ON(p,tf) ) /* process flags */ -#define F_TRAPEXIT (1 << 0) +#define F_HIBERNATE_SCHED (1 << 0) /* Schedule out after hibernate op */ #define F_INSLPQUEUE (1 << 1) /* Set if in timer queue */ #define F_TIMO (1 << 2) /* Set if timeout */ #define F_HEAP_GROW (1 << 3) @@ -920,7 +1057,6 @@ extern struct erts_system_profile_flags_t erts_system_profile_flags; #define F_HAVE_BLCKD_MSCHED (1 << 8) /* Process has blocked multi-scheduling */ #define F_P2PNR_RESCHED (1 << 9) /* Process has been rescheduled via erts_pid2proc_not_running() */ #define F_FORCE_GC (1 << 10) /* Force gc at process in-scheduling */ -#define F_HIBERNATE_SCHED (1 << 11) /* Schedule out after hibernate op */ /* process trace_flags */ #define F_SENSITIVE (1 << 0) @@ -987,67 +1123,10 @@ extern struct erts_system_profile_flags_t erts_system_profile_flags; #define DT_UTAG_FLAGS(P) ((P)->dt_utag_flags) #endif - -#ifdef ERTS_SMP -/* Status flags ... */ -#define ERTS_PROC_SFLG_PENDADD2SCHEDQ (((Uint32) 1) << 0) /* Pending - add to - schedule q */ -#define ERTS_PROC_SFLG_INRUNQ (((Uint32) 1) << 1) /* Process is - in run q */ -#define ERTS_PROC_SFLG_TRAPEXIT (((Uint32) 1) << 2) /* Process is - trapping - exit */ -#define ERTS_PROC_SFLG_RUNNING (((Uint32) 1) << 3) /* Process is - running */ -/* Scheduler flags in process struct... */ -#define ERTS_PROC_RUNQ_FLG_RUNNING (((Uint32) 1) << 0) /* Process is - running */ - -#endif - - -#ifdef ERTS_SMP -#define ERTS_PROC_IS_TRAPPING_EXITS(P) \ - (ERTS_SMP_LC_ASSERT(erts_proc_lc_my_proc_locks((P)) \ - & ERTS_PROC_LOCK_STATUS), \ - (P)->status_flags & ERTS_PROC_SFLG_TRAPEXIT) - -#define ERTS_PROC_SET_TRAP_EXIT(P) \ - (ERTS_SMP_LC_ASSERT(((ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS) \ - & erts_proc_lc_my_proc_locks((P))) \ - == (ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS)), \ - (P)->status_flags |= ERTS_PROC_SFLG_TRAPEXIT, \ - (P)->flags |= F_TRAPEXIT, \ - 1) - -#define ERTS_PROC_UNSET_TRAP_EXIT(P) \ - (ERTS_SMP_LC_ASSERT(((ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS) \ - & erts_proc_lc_my_proc_locks((P))) \ - == (ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS)), \ - (P)->status_flags &= ~ERTS_PROC_SFLG_TRAPEXIT, \ - (P)->flags &= ~F_TRAPEXIT, \ - 0) -#else -#define ERTS_PROC_IS_TRAPPING_EXITS(P) ((P)->flags & F_TRAPEXIT) -#define ERTS_PROC_SET_TRAP_EXIT(P) ((P)->flags |= F_TRAPEXIT, 1) -#define ERTS_PROC_UNSET_TRAP_EXIT(P) ((P)->flags &= ~F_TRAPEXIT, 0) -#endif - /* Option flags to erts_send_exit_signal() */ #define ERTS_XSIG_FLG_IGN_KILL (((Uint32) 1) << 0) #define ERTS_XSIG_FLG_NO_IGN_NORMAL (((Uint32) 1) << 1) - -/* Process status values */ -#define P_FREE 0 -#define P_RUNABLE 1 -#define P_WAITING 2 -#define P_RUNNING 3 -#define P_EXITING 4 -#define P_GARBING 5 -#define P_SUSPENDED 6 - #define CANCEL_TIMER(p) \ do { \ if ((p)->flags & (F_INSLPQUEUE)) \ @@ -1069,6 +1148,9 @@ void erts_early_init_scheduling(int); void erts_init_scheduling(int, int); Eterm erts_sched_wall_time_request(Process *c_p, int set, int enable); +Uint64 erts_get_proc_interval(void); +Uint64 erts_ensure_later_proc_interval(Uint64); +Uint64 erts_step_proc_interval(void); ErtsProcList *erts_proclist_create(Process *); void erts_proclist_destroy(ErtsProcList *); @@ -1104,6 +1186,9 @@ void erts_smp_notify_check_children_needed(void); #if ERTS_USE_ASYNC_READY_Q void erts_notify_check_async_ready_queue(void *); #endif +#ifdef ERTS_SMP +void erts_notify_code_ix_activation(Process* p, ErtsThrPrgrVal later); +#endif void erts_schedule_misc_aux_work(int sched_id, void (*func)(void *), void *arg); @@ -1124,14 +1209,6 @@ Eterm erts_get_schedulers_binds(Process *c_p); Eterm erts_set_cpu_topology(Process *c_p, Eterm term); Eterm erts_bind_schedulers(Process *c_p, Eterm how); ErtsRunQueue *erts_schedid2runq(Uint); -#ifdef ERTS_SMP -ErtsMigrateResult erts_proc_migrate(Process *, - ErtsProcLocks *, - ErtsRunQueue *, - int *, - ErtsRunQueue *, - int *); -#endif Process *schedule(Process*, int); void erts_schedule_misc_op(void (*)(void *), void *); Eterm erl_create_process(Process*, Eterm, Eterm, Eterm, ErlSpawnOpts*); @@ -1180,8 +1257,7 @@ int erts_send_exit_signal(Process *, #ifdef ERTS_SMP void erts_handle_pending_exit(Process *, ErtsProcLocks); #define ERTS_PROC_PENDING_EXIT(P) \ - (ERTS_SMP_LC_ASSERT(erts_proc_lc_my_proc_locks((P)) & ERTS_PROC_LOCK_STATUS),\ - (P)->pending_exit.reason != THE_NON_VALUE) + (ERTS_PSFLG_PENDING_EXIT & erts_smp_atomic32_read_acqb(&(P)->state)) #else #define ERTS_PROC_PENDING_EXIT(P) 0 #endif @@ -1233,13 +1309,26 @@ ErtsSchedulerData *erts_get_scheduler_data(void) #endif #endif +void erts_schedule_process(Process *, erts_aint32_t); + +ERTS_GLB_INLINE void erts_proc_notify_new_message(Process *p); +#if ERTS_GLB_INLINE_INCL_FUNC_DEF +ERTS_GLB_INLINE void +erts_proc_notify_new_message(Process *p) +{ + /* No barrier needed, due to msg lock */ + erts_aint32_t state = erts_smp_atomic32_read_nob(&p->state); + if (!(state & ERTS_PSFLG_ACTIVE)) + erts_schedule_process(p, state); +} +#endif + #if defined(ERTS_SMP) && defined(ERTS_ENABLE_LOCK_CHECK) #define ERTS_PROCESS_LOCK_ONLY_LOCK_CHECK_PROTO__ #include "erl_process_lock.h" #undef ERTS_PROCESS_LOCK_ONLY_LOCK_CHECK_PROTO__ -int erts_smp_lc_runq_is_locked(ErtsRunQueue *); #define ERTS_SMP_LC_CHK_RUNQ_LOCK(RQ, L) \ do { \ if ((L)) \ @@ -1365,13 +1454,91 @@ erts_proc_set_error_handler(Process *p, ErtsProcLocks plocks, Eterm handler) #endif +#ifdef ERTS_INCLUDE_SCHEDULER_INTERNALS + #ifdef ERTS_SMP -ErtsRunQueue *erts_prepare_emigrate(ErtsRunQueue *c_rq, - ErtsRunQueueInfo *c_rqi, - int prio); +#include "erl_thr_progress.h" + +extern erts_atomic_t erts_migration_paths; + +ERTS_GLB_INLINE ErtsMigrationPaths *erts_get_migration_paths_managed(void); +ERTS_GLB_INLINE ErtsMigrationPaths *erts_get_migration_paths(void); ERTS_GLB_INLINE ErtsRunQueue *erts_check_emigration_need(ErtsRunQueue *c_rq, int prio); +#if ERTS_GLB_INLINE_INCL_FUNC_DEF + +ERTS_GLB_INLINE ErtsMigrationPaths * +erts_get_migration_paths_managed(void) +{ + return (ErtsMigrationPaths *) erts_atomic_read_ddrb(&erts_migration_paths); +} + +ERTS_GLB_INLINE ErtsMigrationPaths * +erts_get_migration_paths(void) +{ + if (erts_thr_progress_is_managed_thread()) + return erts_get_migration_paths_managed(); + else + return NULL; +} + +ERTS_GLB_INLINE ErtsRunQueue * +erts_check_emigration_need(ErtsRunQueue *c_rq, int prio) +{ + ErtsMigrationPaths *mps = erts_get_migration_paths(); + ErtsMigrationPath *mp; + Uint32 flags; + + if (!mps) + return NULL; + + mp = &mps->mpath[c_rq->ix]; + flags = mp->flags; + + if (ERTS_CHK_RUNQ_FLG_EMIGRATE(flags, prio)) { + int len; + + if (ERTS_CHK_RUNQ_FLG_EVACUATE(flags, prio)) { + /* force emigration */ + return mp->prio[prio].runq; + } + + if (flags & ERTS_RUNQ_FLG_INACTIVE) { + /* + * Run queue was inactive at last balance. Verify that + * it still is before forcing emigration. + */ + if (ERTS_RUNQ_FLGS_GET(c_rq) & ERTS_RUNQ_FLG_INACTIVE) + return mp->prio[prio].runq; + } + + + if (prio == ERTS_PORT_PRIO_LEVEL) + len = RUNQ_READ_LEN(&c_rq->ports.info.len); + else + len = RUNQ_READ_LEN(&c_rq->procs.prio_info[prio].len); + + if (len > mp->prio[prio].limit.this) { + ErtsRunQueue *n_rq = mp->prio[prio].runq; + if (n_rq) { + if (prio == ERTS_PORT_PRIO_LEVEL) + len = RUNQ_READ_LEN(&n_rq->ports.info.len); + else + len = RUNQ_READ_LEN(&n_rq->procs.prio_info[prio].len); + + if (len < mp->prio[prio].limit.other) + return n_rq; + } + } + } + return NULL; +} + +#endif + +#endif + #endif ERTS_GLB_INLINE int erts_is_scheduler_bound(ErtsSchedulerData *esdp); @@ -1394,29 +1561,6 @@ ERTS_GLB_INLINE void erts_smp_runqs_unlock(ErtsRunQueue *rq1, ErtsRunQueue *rq2) #if ERTS_GLB_INLINE_INCL_FUNC_DEF -#ifdef ERTS_SMP -ERTS_GLB_INLINE ErtsRunQueue * -erts_check_emigration_need(ErtsRunQueue *c_rq, int prio) -{ - ErtsRunQueueInfo *c_rqi; - - if (!ERTS_CHK_RUNQ_FLG_EMIGRATE(c_rq->flags, prio)) - return NULL; - - if (prio == ERTS_PORT_PRIO_LEVEL) - c_rqi = &c_rq->ports.info; - else - c_rqi = &c_rq->procs.prio_info[prio]; - - if (!ERTS_CHK_RUNQ_FLG_EVACUATE(c_rq->flags, prio) - && !(c_rq->flags & ERTS_RUNQ_FLG_INACTIVE) - && c_rqi->len <= c_rqi->migrate.limit.this) - return NULL; - - return erts_prepare_emigrate(c_rq, c_rqi, prio); -} -#endif - ERTS_GLB_INLINE int erts_is_scheduler_bound(ErtsSchedulerData *esdp) { @@ -1454,10 +1598,9 @@ Uint erts_get_scheduler_id(void) ERTS_GLB_INLINE ErtsRunQueue * erts_get_runq_proc(Process *p) { - ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p)); #ifdef ERTS_SMP - ASSERT(p->run_queue); - return p->run_queue; + ASSERT(ERTS_AINT_NULL != erts_atomic_read_nob(&p->run_queue)); + return (ErtsRunQueue *) erts_atomic_read_nob(&p->run_queue); #else return ERTS_RUNQ_IX(0); #endif @@ -1628,25 +1771,13 @@ extern int erts_disable_proc_not_running_opt; #ifdef DEBUG #define ERTS_SMP_ASSERT_IS_NOT_EXITING(P) \ - do { ASSERT(!(P)->is_exiting); } while (0) + do { ASSERT(!ERTS_PROC_IS_EXITING((P))); } while (0) #else #define ERTS_SMP_ASSERT_IS_NOT_EXITING(P) #endif -/* NOTE: At least one process lock has to be held on P! */ -#ifdef ERTS_ENABLE_LOCK_CHECK -#define ERTS_PROC_IS_EXITING(P) \ - (ERTS_SMP_LC_ASSERT(erts_proc_lc_my_proc_locks((P)) != 0 \ - || erts_lc_pix_lock_is_locked(ERTS_PID2PIXLOCK((P)->id))),\ - (P)->is_exiting) -#else -#define ERTS_PROC_IS_EXITING(P) ((P)->is_exiting) -#endif - #else /* !ERTS_SMP */ -#define ERTS_PROC_IS_EXITING(P) ((P)->status == P_EXITING) - #define ERTS_SMP_ASSERT_IS_NOT_EXITING(P) #define erts_pid2proc_not_running erts_pid2proc @@ -1654,6 +1785,10 @@ extern int erts_disable_proc_not_running_opt; #endif +#define ERTS_PROC_IS_EXITING(P) \ + (ERTS_PSFLG_EXITING & erts_smp_atomic32_read_acqb(&(P)->state)) + + /* Minimum NUMBER of processes for a small system to start */ #ifdef ERTS_SMP #define ERTS_MIN_PROCESSES ERTS_NO_OF_PIX_LOCKS diff --git a/erts/emulator/beam/erl_process_dump.c b/erts/emulator/beam/erl_process_dump.c index 3550f1396c..964dc1ae3e 100644 --- a/erts/emulator/beam/erl_process_dump.c +++ b/erts/emulator/beam/erl_process_dump.c @@ -65,14 +65,11 @@ erts_deep_process_dump(int to, void *to_arg) all_binaries = NULL; for (i = 0; i < erts_max_processes; i++) { - if ((process_tab[i] != NULL) && (process_tab[i]->i != ENULL)) { - if (process_tab[i]->status != P_EXITING) { - Process* p = process_tab[i]; - - if (p->status != P_GARBING) { - dump_process_info(to, to_arg, p); - } - } + Process *p = erts_pix2proc(i); + if (p && p->i != ENULL) { + erts_aint32_t state = erts_smp_atomic32_read_acqb(&p->state); + if (!(state & (ERTS_PSFLG_EXITING|ERTS_PSFLG_GC))) + dump_process_info(to, to_arg, p); } } diff --git a/erts/emulator/beam/erl_process_lock.c b/erts/emulator/beam/erl_process_lock.c index b3b4601a31..bae2b383a4 100644 --- a/erts/emulator/beam/erl_process_lock.c +++ b/erts/emulator/beam/erl_process_lock.c @@ -67,10 +67,12 @@ #include "erl_process.h" -const Process erts_proc_lock_busy; +const Process erts_proc_lock_busy = {ERTS_INVALID_PID}; #ifdef ERTS_SMP +#if ERTS_PROC_LOCK_OWN_IMPL + #define ERTS_PROC_LOCK_SPIN_COUNT_MAX 2000 #define ERTS_PROC_LOCK_SPIN_COUNT_SCHED_INC 32 #define ERTS_PROC_LOCK_SPIN_COUNT_BASE 1000 @@ -100,6 +102,13 @@ static erts_proc_lock_queues_t zeroqs = {0}; static erts_smp_spinlock_t qs_lock; static erts_proc_lock_queues_t *queue_free_list; +static int proc_lock_spin_count; +static int aux_thr_proc_lock_spin_count; + +static void cleanup_tse(void); + +#endif /* ERTS_PROC_LOCK_OWN_IMPL */ + #ifdef ERTS_ENABLE_LOCK_CHECK static struct { Sint16 proc_lock_main; @@ -111,16 +120,11 @@ static struct { erts_pix_lock_t erts_pix_locks[ERTS_NO_OF_PIX_LOCKS]; -static int proc_lock_spin_count; -static int aux_thr_proc_lock_spin_count; - -static void cleanup_tse(void); void erts_init_proc_lock(int cpus) { int i; - erts_smp_spinlock_init(&qs_lock, "proc_lck_qs_alloc"); for (i = 0; i < ERTS_NO_OF_PIX_LOCKS; i++) { #ifdef ERTS_ENABLE_LOCK_COUNT erts_mtx_init_x(&erts_pix_locks[i].u.mtx, @@ -129,14 +133,10 @@ erts_init_proc_lock(int cpus) erts_mtx_init(&erts_pix_locks[i].u.mtx, "pix_lock"); #endif } +#if ERTS_PROC_LOCK_OWN_IMPL + erts_smp_spinlock_init(&qs_lock, "proc_lck_qs_alloc"); queue_free_list = NULL; erts_thr_install_exit_handler(cleanup_tse); -#ifdef ERTS_ENABLE_LOCK_CHECK - lc_id.proc_lock_main = erts_lc_get_lock_order_id("proc_main"); - lc_id.proc_lock_link = erts_lc_get_lock_order_id("proc_link"); - lc_id.proc_lock_msgq = erts_lc_get_lock_order_id("proc_msgq"); - lc_id.proc_lock_status = erts_lc_get_lock_order_id("proc_status"); -#endif if (cpus > 1) { proc_lock_spin_count = ERTS_PROC_LOCK_SPIN_COUNT_BASE; proc_lock_spin_count += (ERTS_PROC_LOCK_SPIN_COUNT_SCHED_INC @@ -153,8 +153,17 @@ erts_init_proc_lock(int cpus) } if (proc_lock_spin_count > ERTS_PROC_LOCK_SPIN_COUNT_MAX) proc_lock_spin_count = ERTS_PROC_LOCK_SPIN_COUNT_MAX; +#endif +#ifdef ERTS_ENABLE_LOCK_CHECK + lc_id.proc_lock_main = erts_lc_get_lock_order_id("proc_main"); + lc_id.proc_lock_link = erts_lc_get_lock_order_id("proc_link"); + lc_id.proc_lock_msgq = erts_lc_get_lock_order_id("proc_msgq"); + lc_id.proc_lock_status = erts_lc_get_lock_order_id("proc_status"); +#endif } +#if ERTS_PROC_LOCK_OWN_IMPL + #ifdef ERTS_ENABLE_LOCK_CHECK static void check_unused_tse(erts_tse_t *wtr) @@ -220,13 +229,6 @@ tse_return(erts_tse_t *tse, int force_free_q) erts_tse_return(tse); } -void -erts_proc_lock_prepare_proc_lock_waiter(void) -{ - tse_return(tse_fetch(NULL), 0); -} - - static void cleanup_tse(void) { @@ -651,6 +653,16 @@ erts_proc_unlock_failed(Process *p, transfer_locks(p, wait_locks, pix_lock, 1); /* unlocks pix_lock */ } +#endif /* ERTS_PROC_LOCK_OWN_IMPL */ + +void +erts_proc_lock_prepare_proc_lock_waiter(void) +{ +#if ERTS_PROC_LOCK_OWN_IMPL + tse_return(tse_fetch(NULL), 0); +#endif +} + /* * proc_safelock() locks process locks on two processes. In order * to avoid a deadlock, proc_safelock() unlocks those locks that @@ -659,12 +671,11 @@ erts_proc_unlock_failed(Process *p, */ static void -proc_safelock(Process *a_proc, - erts_pix_lock_t *a_pix_lck, +proc_safelock(int is_sched, + Process *a_proc, ErtsProcLocks a_have_locks, ErtsProcLocks a_need_locks, Process *b_proc, - erts_pix_lock_t *b_pix_lck, ErtsProcLocks b_have_locks, ErtsProcLocks b_need_locks) { @@ -672,7 +683,6 @@ proc_safelock(Process *a_proc, #ifdef ERTS_ENABLE_LOCK_CHECK Eterm pid1, pid2; #endif - erts_pix_lock_t *pix_lck1, *pix_lck2; ErtsProcLocks need_locks1, have_locks1, need_locks2, have_locks2; ErtsProcLocks unlock_mask; int lock_no, refc1 = 0, refc2 = 0; @@ -689,14 +699,12 @@ proc_safelock(Process *a_proc, #ifdef ERTS_ENABLE_LOCK_CHECK pid1 = a_proc->id; #endif - pix_lck1 = a_pix_lck; need_locks1 = a_need_locks; have_locks1 = a_have_locks; p2 = b_proc; #ifdef ERTS_ENABLE_LOCK_CHECK pid2 = b_proc->id; #endif - pix_lck2 = b_pix_lck; need_locks2 = b_need_locks; have_locks2 = b_have_locks; } @@ -705,14 +713,12 @@ proc_safelock(Process *a_proc, #ifdef ERTS_ENABLE_LOCK_CHECK pid1 = b_proc->id; #endif - pix_lck1 = b_pix_lck; need_locks1 = b_need_locks; have_locks1 = b_have_locks; p2 = a_proc; #ifdef ERTS_ENABLE_LOCK_CHECK pid2 = a_proc->id; #endif - pix_lck2 = a_pix_lck; need_locks2 = a_need_locks; have_locks2 = a_have_locks; } @@ -723,14 +729,12 @@ proc_safelock(Process *a_proc, #ifdef ERTS_ENABLE_LOCK_CHECK pid1 = a_proc->id; #endif - pix_lck1 = a_pix_lck; need_locks1 = a_need_locks | b_need_locks; have_locks1 = a_have_locks | b_have_locks; p2 = NULL; #ifdef ERTS_ENABLE_LOCK_CHECK pid2 = 0; #endif - pix_lck2 = NULL; need_locks2 = 0; have_locks2 = 0; } @@ -740,14 +744,12 @@ proc_safelock(Process *a_proc, #ifdef ERTS_ENABLE_LOCK_CHECK pid1 = b_proc->id; #endif - pix_lck1 = b_pix_lck; need_locks1 = b_need_locks; have_locks1 = b_have_locks; p2 = NULL; #ifdef ERTS_ENABLE_LOCK_CHECK pid2 = 0; #endif - pix_lck2 = NULL; need_locks2 = 0; have_locks2 = 0; #ifdef ERTS_ENABLE_LOCK_CHECK @@ -795,21 +797,21 @@ proc_safelock(Process *a_proc, if (unlock_locks) { have_locks1 &= ~unlock_locks; need_locks1 |= unlock_locks; - if (!have_locks1) { + if (!is_sched && !have_locks1) { refc1 = 1; erts_smp_proc_inc_refc(p1); } - erts_smp_proc_unlock__(p1, pix_lck1, unlock_locks); + erts_smp_proc_unlock(p1, unlock_locks); } unlock_locks = unlock_mask & have_locks2; if (unlock_locks) { have_locks2 &= ~unlock_locks; need_locks2 |= unlock_locks; - if (!have_locks2) { + if (!is_sched && !have_locks2) { refc2 = 1; erts_smp_proc_inc_refc(p2); } - erts_smp_proc_unlock__(p2, pix_lck2, unlock_locks); + erts_smp_proc_unlock(p2, unlock_locks); } } @@ -840,7 +842,7 @@ proc_safelock(Process *a_proc, if (need_locks2 & lock) lock_no--; locks = need_locks1 & lock_mask; - erts_smp_proc_lock__(p1, pix_lck1, locks); + erts_smp_proc_lock(p1, locks); have_locks1 |= locks; need_locks1 &= ~locks; } @@ -851,7 +853,7 @@ proc_safelock(Process *a_proc, lock = (1 << ++lock_no); } locks = need_locks2 & lock_mask; - erts_smp_proc_lock__(p2, pix_lck2, locks); + erts_smp_proc_lock(p2, locks); have_locks2 |= locks; need_locks2 &= ~locks; } @@ -886,10 +888,12 @@ proc_safelock(Process *a_proc, } #endif - if (refc1) - erts_smp_proc_dec_refc(p1); - if (refc2) - erts_smp_proc_dec_refc(p2); + if (!is_sched) { + if (refc1) + erts_smp_proc_dec_refc(p1); + if (refc2) + erts_smp_proc_dec_refc(p2); + } } void @@ -900,77 +904,191 @@ erts_proc_safelock(Process *a_proc, ErtsProcLocks b_have_locks, ErtsProcLocks b_need_locks) { - proc_safelock(a_proc, - a_proc ? ERTS_PID2PIXLOCK(a_proc->id) : NULL, + proc_safelock(erts_get_scheduler_id() != 0, + a_proc, a_have_locks, a_need_locks, b_proc, - b_proc ? ERTS_PID2PIXLOCK(b_proc->id) : NULL, b_have_locks, b_need_locks); } -/* - * erts_pid2proc_safelock() is called from erts_pid2proc_opt() when - * it wasn't possible to trylock all locks needed. - * c_p - current process - * c_p_have_locks - locks held on c_p - * pid - process id of process we are looking up - * proc - process struct of process we are looking - * up (both in and out argument) - * need_locks - all locks we need (including have_locks) - * pix_lock - pix lock for process we are looking up - * flags - option flags - */ -void -erts_pid2proc_safelock(Process *c_p, - ErtsProcLocks c_p_have_locks, - Process **proc, - ErtsProcLocks need_locks, - erts_pix_lock_t *pix_lock, - int flags) +Process * +erts_pid2proc_opt(Process *c_p, + ErtsProcLocks c_p_have_locks, + Eterm pid, + ErtsProcLocks pid_need_locks, + int flags) { - Process *p = *proc; - ERTS_LC_ASSERT(p->lock.refc > 0); - ERTS_LC_ASSERT(process_tab[internal_pid_index(p->id)] == p); - p->lock.refc++; - erts_pix_unlock(pix_lock); - - proc_safelock(c_p, - c_p ? ERTS_PID2PIXLOCK(c_p->id) : NULL, - c_p_have_locks, - c_p_have_locks, - p, - pix_lock, - 0, - need_locks); + Process *dec_refc_proc = NULL; + int need_ptl; + ErtsProcLocks need_locks; + Uint pix; + Process *proc; +#if ERTS_PROC_LOCK_OWN_IMPL && defined(ERTS_ENABLE_LOCK_COUNT) + ErtsProcLocks lcnt_locks; +#endif - erts_pix_lock(pix_lock); +#ifdef ERTS_ENABLE_LOCK_CHECK + if (c_p) { + ErtsProcLocks might_unlock = c_p_have_locks & pid_need_locks; + if (might_unlock) + erts_proc_lc_might_unlock(c_p, might_unlock); + } +#endif - if (!p->is_exiting - || ((flags & ERTS_P2P_FLG_ALLOW_OTHER_X) - && process_tab[internal_pid_index(p->id)] == p)) { - ERTS_LC_ASSERT(p->lock.refc > 1); - p->lock.refc--; + if (is_not_internal_pid(pid)) + return NULL; + pix = internal_pid_index(pid); + + ERTS_LC_ASSERT((pid_need_locks & ERTS_PROC_LOCKS_ALL) == pid_need_locks); + need_locks = pid_need_locks; + + if (c_p && c_p->id == pid) { + ASSERT(c_p->id != ERTS_INVALID_PID); + ASSERT(c_p == erts_pix2proc(pix)); + + if (!(flags & ERTS_P2P_FLG_ALLOW_OTHER_X) + && ERTS_PROC_IS_EXITING(c_p)) + return NULL; + need_locks &= ~c_p_have_locks; + if (!need_locks) { + if (flags & ERTS_P2P_FLG_SMP_INC_REFC) + erts_smp_proc_inc_refc(c_p); + return c_p; + } } - else { - /* No proc. Note, we need to keep refc until after process unlock */ - erts_pix_unlock(pix_lock); - erts_smp_proc_unlock__(p, pix_lock, need_locks); - *proc = NULL; - erts_pix_lock(pix_lock); - ERTS_LC_ASSERT(p->lock.refc > 0); - if (--p->lock.refc == 0) { - erts_pix_unlock(pix_lock); - erts_free_proc(p); - erts_pix_lock(pix_lock); + + need_ptl = !erts_get_scheduler_id(); + + if (need_ptl) + erts_smp_rwmtx_rwlock(&erts_proc_tab_rwmtx); + + proc = (Process *) erts_smp_atomic_read_ddrb(&erts_proc.tab[pix]); + + if (proc) { + if (proc->id != pid) + proc = NULL; + else if (!need_locks) { + if (flags & ERTS_P2P_FLG_SMP_INC_REFC) + erts_smp_proc_inc_refc(proc); } + else { + int busy; + +#if ERTS_PROC_LOCK_OWN_IMPL +#ifdef ERTS_ENABLE_LOCK_COUNT + lcnt_locks = need_locks; + if (!(flags & ERTS_P2P_FLG_TRY_LOCK)) { + erts_lcnt_proc_lock(&proc->lock, need_locks); + } +#endif + +#ifdef ERTS_ENABLE_LOCK_CHECK + /* Make sure erts_pid2proc_safelock() is enough to handle + a potential lock order violation situation... */ + busy = erts_proc_lc_trylock_force_busy(proc, need_locks); + if (!busy) +#endif +#endif /* ERTS_PROC_LOCK_OWN_IMPL */ + { + /* Try a quick trylock to grab all the locks we need. */ + busy = (int) erts_smp_proc_raw_trylock__(proc, need_locks); + +#if ERTS_PROC_LOCK_OWN_IMPL && defined(ERTS_ENABLE_LOCK_CHECK) + erts_proc_lc_trylock(proc, need_locks, !busy); +#endif +#ifdef ERTS_PROC_LOCK_DEBUG + if (!busy) + erts_proc_lock_op_debug(proc, need_locks, 1); +#endif + } + +#if ERTS_PROC_LOCK_OWN_IMPL && defined(ERTS_ENABLE_LOCK_COUNT) + if (flags & ERTS_P2P_FLG_TRY_LOCK) + erts_lcnt_proc_trylock(&proc->lock, need_locks, + busy ? EBUSY : 0); +#endif + + if (!busy) { + if (flags & ERTS_P2P_FLG_SMP_INC_REFC) + erts_smp_proc_inc_refc(proc); + +#if ERTS_PROC_LOCK_OWN_IMPL && defined(ERTS_ENABLE_LOCK_COUNT) + /* all is great */ + if (!(flags & ERTS_P2P_FLG_TRY_LOCK)) + erts_lcnt_proc_lock_post_x(&proc->lock, lcnt_locks, + __FILE__, __LINE__); +#endif + + } + else { + if (flags & ERTS_P2P_FLG_TRY_LOCK) + proc = ERTS_PROC_LOCK_BUSY; + else { + if (flags & ERTS_P2P_FLG_SMP_INC_REFC) + erts_smp_proc_inc_refc(proc); + +#if ERTS_PROC_LOCK_OWN_IMPL && defined(ERTS_ENABLE_LOCK_COUNT) + erts_lcnt_proc_lock_unaquire(&proc->lock, lcnt_locks); +#endif + + if (need_ptl) { + erts_smp_proc_inc_refc(proc); + dec_refc_proc = proc; + erts_smp_rwmtx_rwunlock(&erts_proc_tab_rwmtx); + need_ptl = 0; + } + + proc_safelock(!need_ptl, + c_p, + c_p_have_locks, + c_p_have_locks, + proc, + 0, + need_locks); + } + } + } } + + if (need_ptl) + erts_smp_rwmtx_rwunlock(&erts_proc_tab_rwmtx); + + if (need_locks + && proc + && proc != ERTS_PROC_LOCK_BUSY + && (!(flags & ERTS_P2P_FLG_ALLOW_OTHER_X) + ? ERTS_PROC_IS_EXITING(proc) + : (proc + != (Process *) erts_smp_atomic_read_nob(&erts_proc.tab[pix])))) { + + erts_smp_proc_unlock(proc, need_locks); + + if (flags & ERTS_P2P_FLG_SMP_INC_REFC) + dec_refc_proc = proc; + proc = NULL; + + } + + if (dec_refc_proc) + erts_smp_proc_dec_refc(dec_refc_proc); + +#if ERTS_PROC_LOCK_OWN_IMPL && defined(ERTS_PROC_LOCK_DEBUG) + ERTS_LC_ASSERT(!proc + || proc == ERTS_PROC_LOCK_BUSY + || (pid_need_locks == + (ERTS_PROC_LOCK_FLGS_READ_(&proc->lock) + & pid_need_locks))); +#endif + + return proc; } void erts_proc_lock_init(Process *p) { +#if ERTS_PROC_LOCK_OWN_IMPL /* We always start with all locks locked */ #if ERTS_PROC_LOCK_ATOMIC_IMPL erts_smp_atomic32_init_nob(&p->lock.flags, @@ -979,16 +1097,32 @@ erts_proc_lock_init(Process *p) p->lock.flags = ERTS_PROC_LOCKS_ALL; #endif p->lock.queues = NULL; - p->lock.refc = 1; -#ifdef ERTS_ENABLE_LOCK_COUNT - erts_lcnt_proc_lock_init(p); - erts_lcnt_proc_lock(&(p->lock), ERTS_PROC_LOCKS_ALL); - erts_lcnt_proc_lock_post_x(&(p->lock), ERTS_PROC_LOCKS_ALL, __FILE__, __LINE__); -#endif - #ifdef ERTS_ENABLE_LOCK_CHECK erts_proc_lc_trylock(p, ERTS_PROC_LOCKS_ALL, 1); #endif +#elif ERTS_PROC_LOCK_RAW_MUTEX_IMPL + erts_mtx_init_x(&p->lock.main, "proc_main", p->id); + ethr_mutex_lock(&p->lock.main.mtx); +#ifdef ERTS_ENABLE_LOCK_CHECK + erts_lc_trylock(1, &p->lock.main.lc); +#endif + erts_mtx_init_x(&p->lock.link, "proc_link", p->id); + ethr_mutex_lock(&p->lock.link.mtx); +#ifdef ERTS_ENABLE_LOCK_CHECK + erts_lc_trylock(1, &p->lock.link.lc); +#endif + erts_mtx_init_x(&p->lock.msgq, "proc_msgq", p->id); + ethr_mutex_lock(&p->lock.msgq.mtx); +#ifdef ERTS_ENABLE_LOCK_CHECK + erts_lc_trylock(1, &p->lock.msgq.lc); +#endif + erts_mtx_init_x(&p->lock.status, "proc_status", p->id); + ethr_mutex_lock(&p->lock.status.mtx); +#ifdef ERTS_ENABLE_LOCK_CHECK + erts_lc_trylock(1, &p->lock.status.lc); +#endif +#endif + erts_atomic32_init_nob(&p->lock.refc, 1); #ifdef ERTS_PROC_LOCK_DEBUG { int i; @@ -996,11 +1130,30 @@ erts_proc_lock_init(Process *p) erts_smp_atomic32_init_nob(&p->lock.locked[i], (erts_aint32_t) 1); } #endif +#ifdef ERTS_ENABLE_LOCK_COUNT + erts_lcnt_proc_lock_init(p); + erts_lcnt_proc_lock(&(p->lock), ERTS_PROC_LOCKS_ALL); + erts_lcnt_proc_lock_post_x(&(p->lock), ERTS_PROC_LOCKS_ALL, __FILE__, __LINE__); +#endif +} + +void +erts_proc_lock_fin(Process *p) +{ +#if ERTS_PROC_LOCK_RAW_MUTEX_IMPL + erts_mtx_destroy(&p->lock.main); + erts_mtx_destroy(&p->lock.link); + erts_mtx_destroy(&p->lock.msgq); + erts_mtx_destroy(&p->lock.status); +#endif +#if defined(ERTS_ENABLE_LOCK_COUNT) && defined(ERTS_SMP) + erts_lcnt_proc_lock_destroy(p); +#endif } /* --- Process lock counting ----------------------------------------------- */ -#ifdef ERTS_ENABLE_LOCK_COUNT +#if ERTS_PROC_LOCK_OWN_IMPL && defined(ERTS_ENABLE_LOCK_COUNT) void erts_lcnt_proc_lock_init(Process *p) { if (erts_lcnt_rt_options & ERTS_LCNT_OPT_PROCLOCK) { if (p->id != ERTS_INVALID_PID) { @@ -1141,6 +1294,8 @@ void erts_lcnt_enable_proc_lock_count(int enable) { #ifdef ERTS_ENABLE_LOCK_CHECK +#if ERTS_PROC_LOCK_OWN_IMPL + void erts_proc_lc_lock(Process *p, ErtsProcLocks locks) { @@ -1213,9 +1368,12 @@ erts_proc_lc_unlock(Process *p, ErtsProcLocks locks) } } +#endif /* ERTS_PROC_LOCK_OWN_IMPL */ + void erts_proc_lc_might_unlock(Process *p, ErtsProcLocks locks) { +#if ERTS_PROC_LOCK_OWN_IMPL erts_lc_lock_t lck = ERTS_LC_LOCK_INIT(-1, p->id, ERTS_LC_FLG_LT_PROCLOCK); @@ -1235,11 +1393,22 @@ erts_proc_lc_might_unlock(Process *p, ErtsProcLocks locks) lck.id = lc_id.proc_lock_main; erts_lc_might_unlock(&lck); } +#elif ERTS_PROC_LOCK_RAW_MUTEX_IMPL + if (locks & ERTS_PROC_LOCK_MAIN) + erts_lc_might_unlock(&p->lock.main.lc); + if (locks & ERTS_PROC_LOCK_LINK) + erts_lc_might_unlock(&p->lock.link.lc); + if (locks & ERTS_PROC_LOCK_MSGQ) + erts_lc_might_unlock(&p->lock.msgq.lc); + if (locks & ERTS_PROC_LOCK_STATUS) + erts_lc_might_unlock(&p->lock.status.lc); +#endif } void erts_proc_lc_require_lock(Process *p, ErtsProcLocks locks) { +#if ERTS_PROC_LOCK_OWN_IMPL erts_lc_lock_t lck = ERTS_LC_LOCK_INIT(-1, p->id, ERTS_LC_FLG_LT_PROCLOCK); @@ -1259,11 +1428,22 @@ erts_proc_lc_require_lock(Process *p, ErtsProcLocks locks) lck.id = lc_id.proc_lock_status; erts_lc_require_lock(&lck); } +#elif ERTS_PROC_LOCK_RAW_MUTEX_IMPL + if (locks & ERTS_PROC_LOCK_MAIN) + erts_lc_require_lock(&p->lock.main.lc); + if (locks & ERTS_PROC_LOCK_LINK) + erts_lc_require_lock(&p->lock.link.lc); + if (locks & ERTS_PROC_LOCK_MSGQ) + erts_lc_require_lock(&p->lock.msgq.lc); + if (locks & ERTS_PROC_LOCK_STATUS) + erts_lc_require_lock(&p->lock.status.lc); +#endif } void erts_proc_lc_unrequire_lock(Process *p, ErtsProcLocks locks) { +#if ERTS_PROC_LOCK_OWN_IMPL erts_lc_lock_t lck = ERTS_LC_LOCK_INIT(-1, p->id, ERTS_LC_FLG_LT_PROCLOCK); @@ -1283,8 +1463,19 @@ erts_proc_lc_unrequire_lock(Process *p, ErtsProcLocks locks) lck.id = lc_id.proc_lock_main; erts_lc_unrequire_lock(&lck); } +#elif ERTS_PROC_LOCK_RAW_MUTEX_IMPL + if (locks & ERTS_PROC_LOCK_MAIN) + erts_lc_unrequire_lock(&p->lock.main.lc); + if (locks & ERTS_PROC_LOCK_LINK) + erts_lc_unrequire_lock(&p->lock.link.lc); + if (locks & ERTS_PROC_LOCK_MSGQ) + erts_lc_unrequire_lock(&p->lock.msgq.lc); + if (locks & ERTS_PROC_LOCK_STATUS) + erts_lc_unrequire_lock(&p->lock.status.lc); +#endif } +#if ERTS_PROC_LOCK_OWN_IMPL int erts_proc_lc_trylock_force_busy(Process *p, ErtsProcLocks locks) @@ -1310,21 +1501,30 @@ erts_proc_lc_trylock_force_busy(Process *p, ErtsProcLocks locks) return 0; } +#endif /* ERTS_PROC_LOCK_OWN_IMPL */ + void erts_proc_lc_chk_only_proc_main(Process *p) { +#if ERTS_PROC_LOCK_OWN_IMPL erts_lc_lock_t proc_main = ERTS_LC_LOCK_INIT(lc_id.proc_lock_main, p->id, ERTS_LC_FLG_LT_PROCLOCK); erts_lc_check_exact(&proc_main, 1); +#elif ERTS_PROC_LOCK_RAW_MUTEX_IMPL + erts_lc_check_exact(&p->lock.main.lc, 1); +#endif } +#if ERTS_PROC_LOCK_OWN_IMPL #define ERTS_PROC_LC_EMPTY_LOCK_INIT \ ERTS_LC_LOCK_INIT(-1, THE_NON_VALUE, ERTS_LC_FLG_LT_PROCLOCK) +#endif /* ERTS_PROC_LOCK_OWN_IMPL */ void erts_proc_lc_chk_have_proc_locks(Process *p, ErtsProcLocks locks) { int have_locks_len = 0; +#if ERTS_PROC_LOCK_OWN_IMPL erts_lc_lock_t have_locks[4] = {ERTS_PROC_LC_EMPTY_LOCK_INIT, ERTS_PROC_LC_EMPTY_LOCK_INIT, ERTS_PROC_LC_EMPTY_LOCK_INIT, @@ -1345,7 +1545,17 @@ erts_proc_lc_chk_have_proc_locks(Process *p, ErtsProcLocks locks) have_locks[have_locks_len].id = lc_id.proc_lock_status; have_locks[have_locks_len++].extra = p->id; } - +#elif ERTS_PROC_LOCK_RAW_MUTEX_IMPL + erts_lc_lock_t have_locks[4]; + if (locks & ERTS_PROC_LOCK_MAIN) + have_locks[have_locks_len++] = p->lock.main.lc; + if (locks & ERTS_PROC_LOCK_LINK) + have_locks[have_locks_len++] = p->lock.link.lc; + if (locks & ERTS_PROC_LOCK_MSGQ) + have_locks[have_locks_len++] = p->lock.msgq.lc; + if (locks & ERTS_PROC_LOCK_STATUS) + have_locks[have_locks_len++] = p->lock.status.lc; +#endif erts_lc_check(have_locks, have_locks_len, NULL, 0); } @@ -1354,6 +1564,7 @@ erts_proc_lc_chk_proc_locks(Process *p, ErtsProcLocks locks) { int have_locks_len = 0; int have_not_locks_len = 0; +#if ERTS_PROC_LOCK_OWN_IMPL erts_lc_lock_t have_locks[4] = {ERTS_PROC_LC_EMPTY_LOCK_INIT, ERTS_PROC_LC_EMPTY_LOCK_INIT, ERTS_PROC_LC_EMPTY_LOCK_INIT, @@ -1395,6 +1606,27 @@ erts_proc_lc_chk_proc_locks(Process *p, ErtsProcLocks locks) have_not_locks[have_not_locks_len].id = lc_id.proc_lock_status; have_not_locks[have_not_locks_len++].extra = p->id; } +#elif ERTS_PROC_LOCK_RAW_MUTEX_IMPL + erts_lc_lock_t have_locks[4]; + erts_lc_lock_t have_not_locks[4]; + + if (locks & ERTS_PROC_LOCK_MAIN) + have_locks[have_locks_len++] = p->lock.main.lc; + else + have_not_locks[have_not_locks_len++] = p->lock.main.lc; + if (locks & ERTS_PROC_LOCK_LINK) + have_locks[have_locks_len++] = p->lock.link.lc; + else + have_not_locks[have_not_locks_len++] = p->lock.link.lc; + if (locks & ERTS_PROC_LOCK_MSGQ) + have_locks[have_locks_len++] = p->lock.msgq.lc; + else + have_not_locks[have_not_locks_len++] = p->lock.msgq.lc; + if (locks & ERTS_PROC_LOCK_STATUS) + have_locks[have_locks_len++] = p->lock.status.lc; + else + have_not_locks[have_not_locks_len++] = p->lock.status.lc; +#endif erts_lc_check(have_locks, have_locks_len, have_not_locks, have_not_locks_len); @@ -1404,6 +1636,8 @@ ErtsProcLocks erts_proc_lc_my_proc_locks(Process *p) { int resv[4]; + ErtsProcLocks res = 0; +#if ERTS_PROC_LOCK_OWN_IMPL erts_lc_lock_t locks[4] = {ERTS_LC_LOCK_INIT(lc_id.proc_lock_main, p->id, ERTS_LC_FLG_LT_PROCLOCK), @@ -1416,8 +1650,12 @@ erts_proc_lc_my_proc_locks(Process *p) ERTS_LC_LOCK_INIT(lc_id.proc_lock_status, p->id, ERTS_LC_FLG_LT_PROCLOCK)}; - - ErtsProcLocks res = 0; +#elif ERTS_PROC_LOCK_RAW_MUTEX_IMPL + erts_lc_lock_t locks[4] = {p->lock.main.lc, + p->lock.link.lc, + p->lock.msgq.lc, + p->lock.status.lc}; +#endif erts_lc_have_locks(resv, locks, 4); if (resv[0]) @@ -1450,7 +1688,7 @@ erts_proc_lc_chk_no_proc_locks(char *file, int line) #endif /* #ifdef ERTS_ENABLE_LOCK_CHECK */ -#ifdef ERTS_PROC_LOCK_HARD_DEBUG +#if ERTS_PROC_LOCK_OWN_IMPL && defined(ERTS_PROC_LOCK_HARD_DEBUG) void check_queue(erts_proc_lock_t *lck) { @@ -1483,4 +1721,4 @@ check_queue(erts_proc_lock_t *lck) } #endif -#endif /* ERTS_SMP (the whole file) */ +#endif /* ERTS_SMP */ diff --git a/erts/emulator/beam/erl_process_lock.h b/erts/emulator/beam/erl_process_lock.h index 413c45480c..7367e03b44 100644 --- a/erts/emulator/beam/erl_process_lock.h +++ b/erts/emulator/beam/erl_process_lock.h @@ -37,10 +37,21 @@ #include "erl_smp.h" +#if defined(VALGRIND) || defined(ETHR_DISABLE_NATIVE_IMPLS) +# define ERTS_PROC_LOCK_OWN_IMPL 0 +#else +# define ERTS_PROC_LOCK_OWN_IMPL 1 +#endif + #define ERTS_PROC_LOCK_ATOMIC_IMPL 0 #define ERTS_PROC_LOCK_SPINLOCK_IMPL 0 #define ERTS_PROC_LOCK_MUTEX_IMPL 0 +#if !ERTS_PROC_LOCK_OWN_IMPL +#define ERTS_PROC_LOCK_RAW_MUTEX_IMPL 1 +#else +#define ERTS_PROC_LOCK_RAW_MUTEX_IMPL 0 + #if defined(ETHR_HAVE_32BIT_NATIVE_ATOMIC_OPS) # undef ERTS_PROC_LOCK_ATOMIC_IMPL # define ERTS_PROC_LOCK_ATOMIC_IMPL 1 @@ -52,6 +63,8 @@ # define ERTS_PROC_LOCK_MUTEX_IMPL 1 #endif +#endif + #define ERTS_PROC_LOCK_MAX_BIT 3 typedef erts_aint32_t ErtsProcLocks; @@ -59,22 +72,31 @@ typedef erts_aint32_t ErtsProcLocks; typedef struct erts_proc_lock_queues_t_ erts_proc_lock_queues_t; typedef struct erts_proc_lock_t_ { +#if ERTS_PROC_LOCK_OWN_IMPL #if ERTS_PROC_LOCK_ATOMIC_IMPL erts_smp_atomic32_t flags; #else ErtsProcLocks flags; #endif erts_proc_lock_queues_t *queues; - Sint32 refc; -#ifdef ERTS_PROC_LOCK_DEBUG - erts_smp_atomic32_t locked[ERTS_PROC_LOCK_MAX_BIT+1]; -#endif #ifdef ERTS_ENABLE_LOCK_COUNT erts_lcnt_lock_t lcnt_main; erts_lcnt_lock_t lcnt_link; erts_lcnt_lock_t lcnt_msgq; erts_lcnt_lock_t lcnt_status; #endif +#elif ERTS_PROC_LOCK_RAW_MUTEX_IMPL + erts_mtx_t main; + erts_mtx_t link; + erts_mtx_t msgq; + erts_mtx_t status; +#else +# error "no implementation" +#endif + erts_atomic32_t refc; +#ifdef ERTS_PROC_LOCK_DEBUG + erts_smp_atomic32_t locked[ERTS_PROC_LOCK_MAX_BIT+1]; +#endif } erts_proc_lock_t; /* Process lock flags */ @@ -107,11 +129,9 @@ typedef struct erts_proc_lock_t_ { /* * Status lock: * Protects the following fields in the process structure: - * * status - * * rstatus - * * status_flags * * pending_suspenders * * suspendee + * * ... */ #define ERTS_PROC_LOCK_STATUS (((ErtsProcLocks) 1) << ERTS_PROC_LOCK_MAX_BIT) @@ -143,14 +163,11 @@ typedef struct erts_proc_lock_t_ { * Other rules regarding process locking: * * Exiting processes: - * When changing status to P_EXITING on a process, you are required - * to take all process locks (ERTS_PROC_LOCKS_ALL). Thus, by holding - * at least one process lock (whichever one doesn't matter) you - * are guaranteed that the process won't exit until the lock you are - * holding has been released. Appart from all process locks also - * the pix lock corresponding to the process has to be held. - * At the same time as status is changed to P_EXITING, also the - * field 'is_exiting' in the process structure is set to a value != 0. + * When changing state to exiting (ERTS_PSFLG_EXITING) on a process, + * you are required to take all process locks (ERTS_PROC_LOCKS_ALL). + * Thus, by holding at least one process lock (whichever one doesn't + * matter) you are guaranteed that the process won't exit until the + * lock you are holding has been released. * * Lock order: * Process locks with low numeric values has to be locked before @@ -262,12 +279,10 @@ typedef struct { } u; } erts_pix_lock_t; -#define ERTS_PIX2PIXLOCKIX(PIX) \ - ((PIX) & ((1 << ERTS_PIX_LOCKS_BITS) - 1)) -#define ERTS_PIX2PIXLOCK(PIX) \ - (&erts_pix_locks[ERTS_PIX2PIXLOCKIX((PIX))]) #define ERTS_PID2PIXLOCK(PID) \ - ERTS_PIX2PIXLOCK(internal_pid_data((PID))) + (&erts_pix_locks[(internal_pid_data((PID)) & ((1 << ERTS_PIX_LOCKS_BITS) - 1))]) + +#if ERTS_PROC_LOCK_OWN_IMPL #if ERTS_PROC_LOCK_ATOMIC_IMPL @@ -337,11 +352,13 @@ erts_proc_lock_flags_cmpxchg(erts_proc_lock_t *lck, ErtsProcLocks new, #define ERTS_PROC_LOCK_FLGS_READ_(L) ((L)->flags) #endif /* end no opt atomic ops */ +#endif /* ERTS_PROC_LOCK_OWN_IMPL */ extern erts_pix_lock_t erts_pix_locks[ERTS_NO_OF_PIX_LOCKS]; void erts_init_proc_lock(int cpus); void erts_proc_lock_prepare_proc_lock_waiter(void); +#if ERTS_PROC_LOCK_OWN_IMPL void erts_proc_lock_failed(Process *, erts_pix_lock_t *, ErtsProcLocks, @@ -349,6 +366,7 @@ void erts_proc_lock_failed(Process *, void erts_proc_unlock_failed(Process *, erts_pix_lock_t *, ErtsProcLocks); +#endif ERTS_GLB_INLINE void erts_pix_lock(erts_pix_lock_t *); ERTS_GLB_INLINE void erts_pix_unlock(erts_pix_lock_t *); @@ -412,6 +430,7 @@ ERTS_GLB_INLINE int erts_lc_pix_lock_is_locked(erts_pix_lock_t *pixlck) ERTS_GLB_INLINE ErtsProcLocks erts_smp_proc_raw_trylock__(Process *p, ErtsProcLocks locks) { +#if ERTS_PROC_LOCK_OWN_IMPL ErtsProcLocks expct_lflgs = 0; while (1) { @@ -431,8 +450,38 @@ erts_smp_proc_raw_trylock__(Process *p, ErtsProcLocks locks) /* cmpxchg failed, try again (should be rare). */ expct_lflgs = lflgs; } -} +#elif ERTS_PROC_LOCK_RAW_MUTEX_IMPL + + if (locks & ERTS_PROC_LOCK_MAIN) + if (erts_mtx_trylock(&p->lock.main) == EBUSY) + goto busy_main; + if (locks & ERTS_PROC_LOCK_LINK) + if (erts_mtx_trylock(&p->lock.link) == EBUSY) + goto busy_link; + if (locks & ERTS_PROC_LOCK_MSGQ) + if (erts_mtx_trylock(&p->lock.msgq) == EBUSY) + goto busy_msgq; + if (locks & ERTS_PROC_LOCK_STATUS) + if (erts_mtx_trylock(&p->lock.status) == EBUSY) + goto busy_status; + + return 0; + +busy_status: + if (locks & ERTS_PROC_LOCK_MSGQ) + erts_mtx_unlock(&p->lock.msgq); +busy_msgq: + if (locks & ERTS_PROC_LOCK_LINK) + erts_mtx_unlock(&p->lock.link); +busy_link: + if (locks & ERTS_PROC_LOCK_MAIN) + erts_mtx_unlock(&p->lock.main); +busy_main: + + return EBUSY; +#endif +} ERTS_GLB_INLINE void #ifdef ERTS_ENABLE_LOCK_COUNT @@ -446,10 +495,13 @@ erts_smp_proc_lock__(Process *p, ErtsProcLocks locks) #endif { +#if ERTS_PROC_LOCK_OWN_IMPL + ErtsProcLocks old_lflgs; #if !ERTS_PROC_LOCK_ATOMIC_IMPL erts_pix_lock(pix_lck); #endif + #ifdef ERTS_ENABLE_LOCK_COUNT erts_lcnt_proc_lock(&(p->lock), locks); #endif @@ -473,12 +525,14 @@ erts_smp_proc_lock__(Process *p, erts_pix_unlock(pix_lck); } #endif + #ifdef ERTS_ENABLE_LOCK_COUNT erts_lcnt_proc_lock_post_x(&(p->lock), locks, file, line); #endif #ifdef ERTS_ENABLE_LOCK_CHECK erts_proc_lc_lock(p, locks); #endif + #ifdef ERTS_PROC_LOCK_DEBUG erts_proc_lock_op_debug(p, locks, 1); #endif @@ -486,6 +540,22 @@ erts_smp_proc_lock__(Process *p, #if ERTS_PROC_LOCK_ATOMIC_IMPL ETHR_COMPILER_BARRIER; #endif + +#elif ERTS_PROC_LOCK_RAW_MUTEX_IMPL + if (locks & ERTS_PROC_LOCK_MAIN) + erts_mtx_lock(&p->lock.main); + if (locks & ERTS_PROC_LOCK_LINK) + erts_mtx_lock(&p->lock.link); + if (locks & ERTS_PROC_LOCK_MSGQ) + erts_mtx_lock(&p->lock.msgq); + if (locks & ERTS_PROC_LOCK_STATUS) + erts_mtx_lock(&p->lock.status); + +#ifdef ERTS_PROC_LOCK_DEBUG + erts_proc_lock_op_debug(p, locks, 1); +#endif + +#endif } ERTS_GLB_INLINE void @@ -493,6 +563,7 @@ erts_smp_proc_unlock__(Process *p, erts_pix_lock_t *pix_lck, ErtsProcLocks locks) { +#if ERTS_PROC_LOCK_OWN_IMPL ErtsProcLocks old_lflgs; #if ERTS_PROC_LOCK_ATOMIC_IMPL @@ -557,6 +628,23 @@ erts_smp_proc_unlock__(Process *p, break; } + +#elif ERTS_PROC_LOCK_RAW_MUTEX_IMPL + +#ifdef ERTS_PROC_LOCK_DEBUG + erts_proc_lock_op_debug(p, locks, 0); +#endif + + if (locks & ERTS_PROC_LOCK_STATUS) + erts_mtx_unlock(&p->lock.status); + if (locks & ERTS_PROC_LOCK_MSGQ) + erts_mtx_unlock(&p->lock.msgq); + if (locks & ERTS_PROC_LOCK_LINK) + erts_mtx_unlock(&p->lock.link); + if (locks & ERTS_PROC_LOCK_MAIN) + erts_mtx_unlock(&p->lock.main); +#endif + } ERTS_GLB_INLINE int @@ -564,6 +652,7 @@ erts_smp_proc_trylock__(Process *p, erts_pix_lock_t *pix_lck, ErtsProcLocks locks) { +#if ERTS_PROC_LOCK_OWN_IMPL int res; #ifdef ERTS_ENABLE_LOCK_CHECK @@ -575,6 +664,7 @@ erts_smp_proc_trylock__(Process *p, else #endif { + #if !ERTS_PROC_LOCK_ATOMIC_IMPL erts_pix_lock(pix_lck); #endif @@ -613,8 +703,18 @@ erts_smp_proc_trylock__(Process *p, #if ERTS_PROC_LOCK_ATOMIC_IMPL ETHR_COMPILER_BARRIER; #endif - return res; + +#elif ERTS_PROC_LOCK_RAW_MUTEX_IMPL + if (erts_smp_proc_raw_trylock__(p, locks) != 0) + return EBUSY; + else { +#ifdef ERTS_PROC_LOCK_DEBUG + erts_proc_lock_op_debug(p, locks, 1); +#endif + return 0; + } +#endif } #ifdef ERTS_PROC_LOCK_DEBUG @@ -713,44 +813,36 @@ erts_smp_proc_trylock(Process *p, ErtsProcLocks locks) #endif } - ERTS_GLB_INLINE void erts_smp_proc_inc_refc(Process *p) { #ifdef ERTS_SMP - erts_pix_lock_t *pixlck = ERTS_PID2PIXLOCK(p->id); - erts_pix_lock(pixlck); - ERTS_LC_ASSERT(p->lock.refc > 0); - p->lock.refc++; - erts_pix_unlock(pixlck); +#ifdef ERTS_ENABLE_LOCK_CHECK + erts_aint32_t refc = erts_atomic32_inc_read_nob(&p->lock.refc); + ERTS_SMP_LC_ASSERT(refc > 1); +#else + erts_atomic32_inc_nob(&p->lock.refc); +#endif #endif } ERTS_GLB_INLINE void erts_smp_proc_dec_refc(Process *p) { #ifdef ERTS_SMP - Process *fp; - erts_pix_lock_t *pixlck = ERTS_PID2PIXLOCK(p->id); - erts_pix_lock(pixlck); - ERTS_LC_ASSERT(p->lock.refc > 0); - fp = --p->lock.refc == 0 ? p : NULL; - erts_pix_unlock(pixlck); - if (fp) - erts_free_proc(fp); + erts_aint32_t refc = erts_atomic32_dec_read_nob(&p->lock.refc); + ERTS_SMP_LC_ASSERT(refc >= 0); + if (refc == 0) + erts_free_proc(p); #endif } -ERTS_GLB_INLINE void erts_smp_proc_add_refc(Process *p, Sint32 refc) +ERTS_GLB_INLINE void erts_smp_proc_add_refc(Process *p, Sint32 add_refc) { #ifdef ERTS_SMP - Process *fp; - erts_pix_lock_t *pixlck = ERTS_PID2PIXLOCK(p->id); - erts_pix_lock(pixlck); - ERTS_LC_ASSERT(p->lock.refc > 0); - p->lock.refc += refc; - fp = p->lock.refc == 0 ? p : NULL; - erts_pix_unlock(pixlck); - if (fp) - erts_free_proc(fp); + erts_aint32_t refc = erts_atomic32_add_read_nob(&p->lock.refc, + (erts_aint32_t) add_refc); + ERTS_SMP_LC_ASSERT(refc >= 0); + if (refc == 0) + erts_free_proc(p); #endif } @@ -758,6 +850,7 @@ ERTS_GLB_INLINE void erts_smp_proc_add_refc(Process *p, Sint32 refc) #ifdef ERTS_SMP void erts_proc_lock_init(Process *); +void erts_proc_lock_fin(Process *); void erts_proc_safelock(Process *a_proc, ErtsProcLocks a_have_locks, ErtsProcLocks a_need_locks, @@ -790,211 +883,75 @@ extern const Process erts_proc_lock_busy; #define erts_pid2proc(PROC, HL, PID, NL) \ erts_pid2proc_opt((PROC), (HL), (PID), (NL), 0) -ERTS_GLB_INLINE Process * -erts_pid2proc_opt(Process *, ErtsProcLocks, Eterm, ErtsProcLocks, int); -#ifdef ERTS_SMP -void -erts_pid2proc_safelock(Process *c_p, - ErtsProcLocks c_p_have_locks, - Process **proc, - ErtsProcLocks need_locks, - erts_pix_lock_t *pix_lock, - int flags); -ERTS_GLB_INLINE Process *erts_pid2proc_unlocked_opt(Eterm pid, int flags); -#define erts_pid2proc_unlocked(PID) erts_pid2proc_unlocked_opt((PID), 0) -#else -#define erts_pid2proc_unlocked_opt(PID, FLGS) \ - erts_pid2proc_opt(NULL, 0, (PID), 0, FLGS) -#define erts_pid2proc_unlocked(PID) erts_pid2proc_opt(NULL, 0, (PID), 0, 0) +ERTS_GLB_INLINE Process *erts_pix2proc(int ix); +ERTS_GLB_INLINE Process *erts_proc_lookup_raw(Eterm pid); +ERTS_GLB_INLINE Process *erts_proc_lookup(Eterm pid); + +#ifndef ERTS_SMP +ERTS_GLB_INLINE #endif +Process *erts_pid2proc_opt(Process *, ErtsProcLocks, Eterm, ErtsProcLocks, int); #if ERTS_GLB_INLINE_INCL_FUNC_DEF -ERTS_GLB_INLINE Process * -#ifdef ERTS_SMP -erts_pid2proc_unlocked_opt(Eterm pid, int flags) -#else -erts_pid2proc_opt(Process *c_p_unused, - ErtsProcLocks c_p_have_locks_unused, - Eterm pid, - ErtsProcLocks pid_need_locks_unused, - int flags) -#endif +ERTS_GLB_INLINE Process *erts_pix2proc(int ix) { - Uint pix; Process *proc; + ASSERT(0 <= ix && ix < erts_proc.max); + proc = (Process *) erts_smp_atomic_read_nob(&erts_proc.tab[ix]); + return proc == ERTS_PROC_LOCK_BUSY ? NULL : proc; +} + +ERTS_GLB_INLINE Process *erts_proc_lookup_raw(Eterm pid) +{ + Process *proc; + int pix; + + /* + * In SMP case: Only scheduler threads are allowed + * to use this function. Other threads need to + * atomicaly increment refc at lookup, i.e., use + * erts_pid2proc_opt() with ERTS_P2P_FLG_SMP_INC_REFC. + */ + ERTS_SMP_LC_ASSERT(erts_get_scheduler_id()); if (is_not_internal_pid(pid)) return NULL; pix = internal_pid_index(pid); - if(pix >= erts_max_processes) + + proc = (Process *) erts_smp_atomic_read_ddrb(&erts_proc.tab[pix]); + + if (proc && proc->id != pid) return NULL; - proc = process_tab[pix]; - if (proc) { - if (proc->id != pid - || (!(flags & ERTS_P2P_FLG_ALLOW_OTHER_X) - && proc->status == P_EXITING)) - proc = NULL; - } + return proc; } -#ifdef ERTS_SMP +ERTS_GLB_INLINE Process *erts_proc_lookup(Eterm pid) +{ + Process *proc = erts_proc_lookup_raw(pid); + if (proc && ERTS_PROC_IS_EXITING(proc)) + return NULL; + return proc; +} +#ifndef ERTS_SMP ERTS_GLB_INLINE Process * -erts_pid2proc_opt(Process *c_p, - ErtsProcLocks c_p_have_locks, +erts_pid2proc_opt(Process *c_p_unused, + ErtsProcLocks c_p_have_locks_unused, Eterm pid, - ErtsProcLocks pid_need_locks, + ErtsProcLocks pid_need_locks_unused, int flags) { - erts_pix_lock_t *pix_lock; - ErtsProcLocks need_locks; - Uint pix; - Process *proc; -#ifdef ERTS_ENABLE_LOCK_COUNT - ErtsProcLocks lcnt_locks; -#endif - -#ifdef ERTS_ENABLE_LOCK_CHECK - if (c_p) { - ErtsProcLocks might_unlock = c_p_have_locks & pid_need_locks; - if (might_unlock) - erts_proc_lc_might_unlock(c_p, might_unlock); - } -#endif - if (is_not_internal_pid(pid)) { - proc = NULL; - goto done; - } - pix = internal_pid_index(pid); - if(pix >= erts_max_processes) { - proc = NULL; - goto done; - } - - ERTS_LC_ASSERT((pid_need_locks & ERTS_PROC_LOCKS_ALL) == pid_need_locks); - need_locks = pid_need_locks; - - pix_lock = ERTS_PIX2PIXLOCK(pix); - - if (c_p && c_p->id == pid) { - ASSERT(c_p->id != ERTS_INVALID_PID); - ASSERT(c_p == process_tab[pix]); - if (!(flags & ERTS_P2P_FLG_ALLOW_OTHER_X) && c_p->is_exiting) { - proc = NULL; - goto done; - } - need_locks &= ~c_p_have_locks; - if (!need_locks) { - proc = c_p; - erts_pix_lock(pix_lock); - if (flags & ERTS_P2P_FLG_SMP_INC_REFC) - proc->lock.refc++; - erts_pix_unlock(pix_lock); - goto done; - } - } - - erts_pix_lock(pix_lock); - - proc = process_tab[pix]; - if (proc) { - if (proc->id != pid || (!(flags & ERTS_P2P_FLG_ALLOW_OTHER_X) - && ERTS_PROC_IS_EXITING(proc))) { - proc = NULL; - } - else if (!need_locks) { - if (flags & ERTS_P2P_FLG_SMP_INC_REFC) - proc->lock.refc++; - } - else { - int busy; - -#ifdef ERTS_ENABLE_LOCK_COUNT - lcnt_locks = need_locks; - if (!(flags & ERTS_P2P_FLG_TRY_LOCK)) { - erts_lcnt_proc_lock(&proc->lock, need_locks); - } -#endif - -#ifdef ERTS_ENABLE_LOCK_CHECK - /* Make sure erts_pid2proc_safelock() is enough to handle - a potential lock order violation situation... */ - busy = erts_proc_lc_trylock_force_busy(proc, need_locks); - if (!busy) -#endif - { - /* Try a quick trylock to grab all the locks we need. */ - busy = (int) erts_smp_proc_raw_trylock__(proc, need_locks); -#ifdef ERTS_ENABLE_LOCK_CHECK - erts_proc_lc_trylock(proc, need_locks, !busy); -#endif -#ifdef ERTS_PROC_LOCK_DEBUG - if (!busy) - erts_proc_lock_op_debug(proc, need_locks, 1); -#endif - } - -#ifdef ERTS_ENABLE_LOCK_COUNT - if (flags & ERTS_P2P_FLG_TRY_LOCK) { - if (busy) { - erts_lcnt_proc_trylock(&proc->lock, need_locks, EBUSY); - } else { - erts_lcnt_proc_trylock(&proc->lock, need_locks, 0); - } - } -#endif - if (!busy) { - if (flags & ERTS_P2P_FLG_SMP_INC_REFC) - proc->lock.refc++; -#ifdef ERTS_ENABLE_LOCK_COUNT - /* all is great */ - if (!(flags & ERTS_P2P_FLG_TRY_LOCK)) { - erts_lcnt_proc_lock_post_x(&proc->lock, lcnt_locks, __FILE__, __LINE__); - } -#endif - } - else { - if (flags & ERTS_P2P_FLG_TRY_LOCK) - proc = ERTS_PROC_LOCK_BUSY; - else { -#ifdef ERTS_ENABLE_LOCK_COUNT - erts_lcnt_proc_lock_unaquire(&proc->lock, lcnt_locks); -#endif - erts_pid2proc_safelock(c_p, - c_p_have_locks, - &proc, - pid_need_locks, - pix_lock, - flags); - if (proc && (flags & ERTS_P2P_FLG_SMP_INC_REFC)) - proc->lock.refc++; - } - } - } - } - - erts_pix_unlock(pix_lock); -#ifdef ERTS_PROC_LOCK_DEBUG - ERTS_LC_ASSERT(!proc - || proc == ERTS_PROC_LOCK_BUSY - || (pid_need_locks == - (ERTS_PROC_LOCK_FLGS_READ_(&proc->lock) - & pid_need_locks))); -#endif - - - done: - -#if ERTS_PROC_LOCK_ATOMIC_IMPL - ETHR_COMPILER_BARRIER; -#endif - - return proc; + Process *proc = erts_proc_lookup_raw(pid); + return ((!(flags & ERTS_P2P_FLG_ALLOW_OTHER_X) + && proc + && ERTS_PROC_IS_EXITING(proc)) + ? NULL + : proc); } -#endif /* ERTS_SMP */ +#endif /* !ERTS_SMP */ #endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */ diff --git a/erts/emulator/beam/erl_threads.h b/erts/emulator/beam/erl_threads.h index ee47c98009..17628286bc 100644 --- a/erts/emulator/beam/erl_threads.h +++ b/erts/emulator/beam/erl_threads.h @@ -258,10 +258,6 @@ #include "sys.h" -typedef struct { SWord sint[2]; } erts_no_dw_atomic_t; -typedef SWord erts_no_atomic_t; -typedef Sint32 erts_no_atomic32_t; - #ifdef USE_THREADS #define ETHR_TRY_INLINE_FUNCS @@ -411,12 +407,15 @@ typedef struct { typedef int erts_rwmtx_t; typedef int erts_tsd_key_t; typedef int erts_tse_t; -#define erts_dw_aint_t erts_no_dw_atomic_t -#define erts_dw_atomic_t erts_no_dw_atomic_t -#define erts_aint_t SWord -#define erts_atomic_t erts_no_atomic_t -#define erts_aint32_t Sint32 -#define erts_atomic32_t erts_no_atomic32_t + +typedef struct { SWord sint[2]; } erts_dw_aint_t; +typedef SWord erts_aint_t; +typedef Sint32 erts_aint32_t; + +#define erts_dw_atomic_t erts_dw_aint_t +#define erts_atomic_t erts_aint_t +#define erts_atomic32_t erts_aint32_t + #if __GNUC__ > 2 typedef struct { } erts_spinlock_t; typedef struct { } erts_rwlock_t; @@ -425,6 +424,14 @@ typedef struct { int gcc_is_buggy; } erts_spinlock_t; typedef struct { int gcc_is_buggy; } erts_rwlock_t; #endif +#ifdef WORDS_BIGENDIAN +#define ERTS_DW_AINT_LOW_WORD 1 +#define ERTS_DW_AINT_HIGH_WORD 0 +#else +#define ERTS_DW_AINT_LOW_WORD 0 +#define ERTS_DW_AINT_HIGH_WORD 1 +#endif + #define ERTS_MTX_INITER 0 #define ERTS_CND_INITER 0 #define ERTS_THR_INIT_DATA_DEF_INITER 0 @@ -433,6 +440,10 @@ typedef struct { int gcc_is_buggy; } erts_rwlock_t; #endif /* #ifdef USE_THREADS */ +#define erts_no_dw_atomic_t erts_dw_aint_t +#define erts_no_atomic_t erts_aint_t +#define erts_no_atomic32_t erts_aint32_t + #define ERTS_AINT_NULL ((erts_aint_t) NULL) #define ERTS_AINT_T_MAX (~(((erts_aint_t) 1) << (sizeof(erts_aint_t)*8-1))) diff --git a/erts/emulator/beam/erl_time.h b/erts/emulator/beam/erl_time.h index 6c6e193818..4bbdcaa3e3 100644 --- a/erts/emulator/beam/erl_time.h +++ b/erts/emulator/beam/erl_time.h @@ -118,9 +118,11 @@ ERTS_GLB_INLINE void erts_do_time_add(erts_short_time_t elapsed) void erts_get_now_cpu(Uint* megasec, Uint* sec, Uint* microsec); #endif +typedef UWord erts_approx_time_t; +erts_approx_time_t erts_get_approx_time(void); + void erts_get_timeval(SysTimeval *tv); erts_time_t erts_get_time(void); -void erts_get_emu_time(SysTimeval *); ERTS_GLB_INLINE int erts_cmp_timeval(SysTimeval *t1p, SysTimeval *t2p); diff --git a/erts/emulator/beam/erl_time_sup.c b/erts/emulator/beam/erl_time_sup.c index 1d0735aa99..c1b4408c06 100644 --- a/erts/emulator/beam/erl_time_sup.c +++ b/erts/emulator/beam/erl_time_sup.c @@ -91,6 +91,41 @@ static SysTimeval then; /* Used in get_now */ static SysTimeval last_emu_time; /* Used in erts_get_emu_time() */ SysTimeval erts_first_emu_time; /* Used in erts_get_emu_time() */ +union { + erts_smp_atomic_t time; + char align[ERTS_CACHE_LINE_SIZE]; +} approx erts_align_attribute(ERTS_CACHE_LINE_SIZE); + +static void +init_approx_time(void) +{ + erts_smp_atomic_init_nob(&approx.time, 0); +} + +static ERTS_INLINE erts_approx_time_t +get_approx_time(void) +{ + return (erts_approx_time_t) erts_smp_atomic_read_nob(&approx.time); +} + +static ERTS_INLINE void +update_approx_time(SysTimeval *tv) +{ + erts_approx_time_t new_secs = (erts_approx_time_t) tv->tv_sec; + erts_approx_time_t old_secs = get_approx_time(); + if (old_secs != new_secs) + erts_smp_atomic_set_nob(&approx.time, new_secs); +} + +/* + * erts_get_approx_time() returns an *approximate* time + * in seconds. NOTE that this time may jump backwards!!! + */ +erts_approx_time_t +erts_get_approx_time(void) +{ + return get_approx_time(); +} #ifdef HAVE_GETHRTIME @@ -398,6 +433,8 @@ erts_init_time_sup(void) { erts_smp_mtx_init(&erts_timeofday_mtx, "timeofday"); + init_approx_time(); + last_emu_time.tv_sec = 0; last_emu_time.tv_usec = 0; @@ -417,7 +454,7 @@ erts_init_time_sup(void) gtv = inittv; then.tv_sec = then.tv_usec = 0; - erts_get_emu_time(&erts_first_emu_time); + erts_deliver_time(); return CLOCK_RESOLUTION; } @@ -873,6 +910,8 @@ get_now(Uint* megasec, Uint* sec, Uint* microsec) *megasec = (Uint) (now.tv_sec / 1000000); *sec = (Uint) (now.tv_sec % 1000000); *microsec = (Uint) (now.tv_usec); + + update_approx_time(&now); } void @@ -885,6 +924,8 @@ get_sys_now(Uint* megasec, Uint* sec, Uint* microsec) *megasec = (Uint) (now.tv_sec / 1000000); *sec = (Uint) (now.tv_sec % 1000000); *microsec = (Uint) (now.tv_usec); + + update_approx_time(&now); } @@ -901,6 +942,8 @@ void erts_deliver_time(void) { do_erts_deliver_time(&now); erts_smp_mtx_unlock(&erts_timeofday_mtx); + + update_approx_time(&now); } /* get *real* time (not ticks) remaining until next timeout - if there @@ -949,6 +992,7 @@ void erts_get_timeval(SysTimeval *tv) erts_smp_mtx_lock(&erts_timeofday_mtx); get_tolerant_timeofday(tv); erts_smp_mtx_unlock(&erts_timeofday_mtx); + update_approx_time(tv); } erts_time_t @@ -961,7 +1005,9 @@ erts_get_time(void) get_tolerant_timeofday(&sys_tv); erts_smp_mtx_unlock(&erts_timeofday_mtx); - + + update_approx_time(&sys_tv); + return sys_tv.tv_sec; } @@ -977,38 +1023,3 @@ void erts_get_now_cpu(Uint* megasec, Uint* sec, Uint* microsec) { *sec = (Uint)(tp.tv_sec % 1000000); } #endif - - -/* - * erts_get_emu_time() is similar to get_now(). You will - * always get different times from erts_get_emu_time(), but they - * may equal a time from get_now(). - * - * erts_get_emu_time() is only used internally in the emulator in - * order to order emulator internal events. - */ - -void -erts_get_emu_time(SysTimeval *this_emu_time_p) -{ - erts_smp_mtx_lock(&erts_timeofday_mtx); - - get_tolerant_timeofday(this_emu_time_p); - - /* Make sure time is later than last */ - if (last_emu_time.tv_sec > this_emu_time_p->tv_sec || - (last_emu_time.tv_sec == this_emu_time_p->tv_sec - && last_emu_time.tv_usec >= this_emu_time_p->tv_usec)) { - *this_emu_time_p = last_emu_time; - this_emu_time_p->tv_usec++; - } - /* Check for carry from above + general reasonability */ - if (this_emu_time_p->tv_usec >= 1000000) { - this_emu_time_p->tv_usec = 0; - this_emu_time_p->tv_sec++; - } - - last_emu_time = *this_emu_time_p; - - erts_smp_mtx_unlock(&erts_timeofday_mtx); -} diff --git a/erts/emulator/beam/erl_trace.c b/erts/emulator/beam/erl_trace.c index 009ca1eb52..bc988cd61b 100644 --- a/erts/emulator/beam/erl_trace.c +++ b/erts/emulator/beam/erl_trace.c @@ -64,7 +64,7 @@ int erts_cpu_timestamp; #endif static erts_smp_mtx_t smq_mtx; -static erts_smp_mtx_t sys_trace_mtx; +static erts_smp_rwmtx_t sys_trace_rwmtx; enum ErtsSysMsgType { SYS_MSG_TYPE_UNDEFINED, @@ -91,7 +91,12 @@ static void init_sys_msg_dispatcher(void); #endif void erts_init_trace(void) { - erts_smp_mtx_init(&sys_trace_mtx, "sys_tracers"); + erts_smp_rwmtx_opt_t rwmtx_opts = ERTS_SMP_RWMTX_OPT_DEFAULT_INITER; + rwmtx_opts.type = ERTS_SMP_RWMTX_TYPE_EXTREMELY_FREQUENT_READ; + rwmtx_opts.lived = ERTS_SMP_RWMTX_LONG_LIVED; + + erts_smp_rwmtx_init_opt(&sys_trace_rwmtx, &rwmtx_opts, "sys_tracers"); + #ifdef HAVE_ERTS_NOW_CPU erts_cpu_timestamp = 0; #endif @@ -151,8 +156,8 @@ do { (RES) = (TPID); } while(0) #define ERTS_TRACER_REF_TYPE Process * #define ERTS_GET_TRACER_REF(RES, TPID, TRACEE_FLGS) \ do { \ - (RES) = process_tab[internal_pid_index((TPID))]; \ - if (INVALID_PID((RES), (TPID)) || !((RES)->trace_flags & F_TRACER)) { \ + (RES) = erts_proc_lookup((TPID)); \ + if (!(RES) || !((RES)->trace_flags & F_TRACER)) { \ (TPID) = NIL; \ (TRACEE_FLGS) &= ~TRACEE_FLAGS; \ return; \ @@ -169,10 +174,10 @@ erts_system_profile_setup_active_schedulers(void) active_sched = erts_active_schedulers(); } -void -erts_trace_check_exiting(Eterm exiting) +static void +exiting_reset(Eterm exiting) { - erts_smp_mtx_lock(&sys_trace_mtx); + erts_smp_rwmtx_rwlock(&sys_trace_rwmtx); if (exiting == default_tracer) { default_tracer = NIL; default_trace_flags &= TRACEE_FLAGS; @@ -202,29 +207,49 @@ erts_trace_check_exiting(Eterm exiting) erts_system_profile_clear(NULL); #endif } - erts_smp_mtx_unlock(&sys_trace_mtx); + erts_smp_rwmtx_rwunlock(&sys_trace_rwmtx); +} + +void +erts_trace_check_exiting(Eterm exiting) +{ + int reset = 0; + erts_smp_rwmtx_rlock(&sys_trace_rwmtx); + if (exiting == default_tracer) + reset = 1; + else if (exiting == system_seq_tracer) + reset = 1; + else if (exiting == system_monitor) + reset = 1; + else if (exiting == system_profile) + reset = 1; + erts_smp_rwmtx_runlock(&sys_trace_rwmtx); + if (reset) + exiting_reset(exiting); +} + +static ERTS_INLINE int +is_valid_tracer(Eterm tracer) +{ + return erts_proc_lookup(tracer) || erts_is_valid_tracer_port(tracer); } Eterm erts_set_system_seq_tracer(Process *c_p, ErtsProcLocks c_p_locks, Eterm new) { - Eterm old = THE_NON_VALUE; + Eterm old; - if (new != am_false) { - if (!erts_pid2proc(c_p, c_p_locks, new, 0) - && !erts_is_valid_tracer_port(new)) { - return old; - } - } + if (new != am_false && !is_valid_tracer(new)) + return THE_NON_VALUE; - erts_smp_mtx_lock(&sys_trace_mtx); + erts_smp_rwmtx_rwlock(&sys_trace_rwmtx); old = system_seq_tracer; system_seq_tracer = new; #ifdef DEBUG_PRINTOUTS erts_fprintf(stderr, "set seq tracer new=%T old=%T\n", new, old); #endif - erts_smp_mtx_unlock(&sys_trace_mtx); + erts_smp_rwmtx_rwunlock(&sys_trace_rwmtx); return old; } @@ -232,12 +257,12 @@ Eterm erts_get_system_seq_tracer(void) { Eterm st; - erts_smp_mtx_lock(&sys_trace_mtx); + erts_smp_rwmtx_rlock(&sys_trace_rwmtx); st = system_seq_tracer; #ifdef DEBUG_PRINTOUTS erts_fprintf(stderr, "get seq tracer %T\n", st); #endif - erts_smp_mtx_unlock(&sys_trace_mtx); + erts_smp_rwmtx_runlock(&sys_trace_rwmtx); return st; } @@ -250,7 +275,7 @@ get_default_tracing(Uint *flagsp, Eterm *tracerp) if (is_nil(default_tracer)) { default_trace_flags &= ~TRACEE_FLAGS; } else if (is_internal_pid(default_tracer)) { - if (!erts_pid2proc(NULL, 0, default_tracer, 0)) { + if (!erts_proc_lookup(default_tracer)) { reset_tracer: default_trace_flags &= ~TRACEE_FLAGS; default_tracer = NIL; @@ -270,7 +295,7 @@ get_default_tracing(Uint *flagsp, Eterm *tracerp) void erts_change_default_tracing(int setflags, Uint *flagsp, Eterm *tracerp) { - erts_smp_mtx_lock(&sys_trace_mtx); + erts_smp_rwmtx_rwlock(&sys_trace_rwmtx); if (flagsp) { if (setflags) default_trace_flags |= *flagsp; @@ -280,48 +305,48 @@ erts_change_default_tracing(int setflags, Uint *flagsp, Eterm *tracerp) if (tracerp) default_tracer = *tracerp; get_default_tracing(flagsp, tracerp); - erts_smp_mtx_unlock(&sys_trace_mtx); + erts_smp_rwmtx_rwunlock(&sys_trace_rwmtx); } void erts_get_default_tracing(Uint *flagsp, Eterm *tracerp) { - erts_smp_mtx_lock(&sys_trace_mtx); + erts_smp_rwmtx_rlock(&sys_trace_rwmtx); get_default_tracing(flagsp, tracerp); - erts_smp_mtx_unlock(&sys_trace_mtx); + erts_smp_rwmtx_runlock(&sys_trace_rwmtx); } void erts_set_system_monitor(Eterm monitor) { - erts_smp_mtx_lock(&sys_trace_mtx); + erts_smp_rwmtx_rwlock(&sys_trace_rwmtx); system_monitor = monitor; - erts_smp_mtx_unlock(&sys_trace_mtx); + erts_smp_rwmtx_rwunlock(&sys_trace_rwmtx); } Eterm erts_get_system_monitor(void) { Eterm monitor; - erts_smp_mtx_lock(&sys_trace_mtx); + erts_smp_rwmtx_rlock(&sys_trace_rwmtx); monitor = system_monitor; - erts_smp_mtx_unlock(&sys_trace_mtx); + erts_smp_rwmtx_runlock(&sys_trace_rwmtx); return monitor; } /* Performance monitoring */ void erts_set_system_profile(Eterm profile) { - erts_smp_mtx_lock(&sys_trace_mtx); + erts_smp_rwmtx_rwlock(&sys_trace_rwmtx); system_profile = profile; - erts_smp_mtx_unlock(&sys_trace_mtx); + erts_smp_rwmtx_rwunlock(&sys_trace_rwmtx); } Eterm erts_get_system_profile(void) { Eterm profile; - erts_smp_mtx_lock(&sys_trace_mtx); + erts_smp_rwmtx_rlock(&sys_trace_rwmtx); profile = system_profile; - erts_smp_mtx_unlock(&sys_trace_mtx); + erts_smp_rwmtx_runlock(&sys_trace_rwmtx); return profile; } @@ -384,13 +409,9 @@ WRITE_SYS_MSG_TO_PORT(Eterm unused_to, } #ifndef ERTS_SMP - if (!INVALID_TRACER_PORT(trace_port, trace_port->id)) { + if (!INVALID_TRACER_PORT(trace_port, trace_port->id)) #endif erts_raw_port_command(trace_port, buffer, ptr-buffer); -#ifndef ERTS_SMP - erts_port_release(trace_port); - } -#endif erts_free(ERTS_ALC_T_TMP, (void *) buffer); } @@ -465,13 +486,13 @@ send_to_port(Process *c_p, Eterm message, trace_port = NULL; #else - if (is_not_internal_port(*tracer_pid)) - goto invalid_tracer_port; - trace_port = &erts_port[internal_port_index(*tracer_pid)]; + trace_port = erts_id2port_sflgs(*tracer_pid, + NULL, + 0, + ERTS_PORT_SFLGS_INVALID_TRACER_LOOKUP); - if (INVALID_TRACER_PORT(trace_port, *tracer_pid)) { - invalid_tracer_port: + if (!trace_port) { *tracee_flags &= ~TRACEE_FLAGS; *tracer_pid = NIL; return; @@ -491,6 +512,7 @@ send_to_port(Process *c_p, Eterm message, SYS_MSG_TYPE_TRACE, message); #ifndef ERTS_SMP + erts_port_release(trace_port); return; } @@ -537,6 +559,9 @@ send_to_port(Process *c_p, Eterm message, */ do_send_schedfix_to_port(trace_port, c_p->id, ts); } + + erts_port_release(trace_port); + UnUseTmpHeapNoproc(LOCAL_HEAP_SIZE); #undef LOCAL_HEAP_SIZE #endif @@ -566,23 +591,28 @@ profile_send(Eterm from, Eterm message) { Port *profiler_port = NULL; /* not smp */ - - - profiler_port = &erts_port[internal_port_index(profiler)]; - - do_send_to_port(profiler, - profiler_port, - NIL, /* or current process->id */ - SYS_MSG_TYPE_SYSPROF, - message); + + profiler_port = erts_id2port_sflgs(profiler, + NULL, + 0, + ERTS_PORT_SFLGS_INVALID_TRACER_LOOKUP); + if (profiler_port) { + do_send_to_port(profiler, + profiler_port, + NIL, /* or current process->id */ + SYS_MSG_TYPE_SYSPROF, + message); + erts_port_release(profiler_port); + } } else { ASSERT(is_internal_pid(profiler) && internal_pid_index(profiler) < erts_max_processes); - profile_p = process_tab[internal_pid_index(profiler)]; + profile_p = erts_proc_lookup(profiler); - if (INVALID_PID(profile_p, profiler)) return; + if (!profile_p) + return; sz = size_object(message); hp = erts_alloc_message_heap(sz, &bp, &off_heap, profile_p, 0); @@ -626,13 +656,11 @@ seq_trace_send_to_port(Process *c_p, trace_port = NULL; #else - if (is_not_internal_port(seq_tracer)) - goto invalid_tracer_port; - - trace_port = &erts_port[internal_port_index(seq_tracer)]; - - if (INVALID_TRACER_PORT(trace_port, seq_tracer)) { - invalid_tracer_port: + trace_port = erts_id2port_sflgs(seq_tracer, + NULL, + 0, + ERTS_PORT_SFLGS_INVALID_TRACER_LOOKUP); + if (!trace_port) { system_seq_tracer = am_false; #ifndef ERTS_SMP UnUseTmpHeapNoproc(LOCAL_HEAP_SIZE); @@ -650,6 +678,7 @@ seq_trace_send_to_port(Process *c_p, message); #ifndef ERTS_SMP + erts_port_release(trace_port); UnUseTmpHeapNoproc(LOCAL_HEAP_SIZE); return; } @@ -691,6 +720,9 @@ seq_trace_send_to_port(Process *c_p, */ do_send_schedfix_to_port(trace_port, c_p->id, ts); } + + erts_port_release(trace_port); + UnUseTmpHeapNoproc(LOCAL_HEAP_SIZE); #undef LOCAL_HEAP_SIZE #endif @@ -789,13 +821,8 @@ trace_sched_aux(Process *p, Eterm what, int never_fake_sched) ERTS_GET_TRACER_REF(tracer_ref, p->tracer_proc, p->trace_flags); } - if (ERTS_PROC_IS_EXITING(p) -#ifndef ERTS_SMP - || p->status == P_FREE -#endif - ) { + if (ERTS_PROC_IS_EXITING(p)) curr_func = 0; - } else { if (!p->current) p->current = find_function_from_pc(p->i); @@ -874,7 +901,7 @@ trace_send(Process *p, Eterm to, Eterm msg) operation = am_send; if (is_internal_pid(to)) { - if (!erts_pid2proc(p, ERTS_PROC_LOCK_MAIN, to, 0)) + if (!erts_proc_lookup(to)) goto send_to_non_existing_process; } else if(is_external_pid(to) @@ -1116,8 +1143,8 @@ seq_trace_output_generic(Eterm token, Eterm msg, Uint type, #ifndef ERTS_SMP - tracer = process_tab[internal_pid_index(seq_tracer)]; - if (INVALID_PID(tracer, tracer->id)) { + tracer = erts_proc_lookup(seq_tracer); + if (!tracer) { system_seq_tracer = am_false; return; /* no need to send anything */ } @@ -2451,10 +2478,9 @@ monitor_long_gc(Process *p, Uint time) { #ifndef ERTS_SMP ASSERT(is_internal_pid(system_monitor) && internal_pid_index(system_monitor) < erts_max_processes); - monitor_p = process_tab[internal_pid_index(system_monitor)]; - if (INVALID_PID(monitor_p, system_monitor) || p == monitor_p) { + monitor_p = erts_proc_lookup(system_monitor); + if (!monitor_p || p == monitor_p) return; - } #endif hsz = 0; @@ -2527,8 +2553,8 @@ monitor_large_heap(Process *p) { #ifndef ERTS_SMP ASSERT(is_internal_pid(system_monitor) && internal_pid_index(system_monitor) < erts_max_processes); - monitor_p = process_tab[internal_pid_index(system_monitor)]; - if (INVALID_PID(monitor_p, system_monitor) || p == monitor_p) { + monitor_p = erts_proc_lookup(system_monitor); + if (monitor_p || p == monitor_p) { return; } #endif @@ -2582,10 +2608,9 @@ monitor_generic(Process *p, Eterm type, Eterm spec) { #ifndef ERTS_SMP ASSERT(is_internal_pid(system_monitor) && internal_pid_index(system_monitor) < erts_max_processes); - monitor_p = process_tab[internal_pid_index(system_monitor)]; - if (INVALID_PID(monitor_p, system_monitor) || p == monitor_p) { + monitor_p = erts_proc_lookup(system_monitor); + if (!monitor_p || p == monitor_p) return; - } #endif hp = ERTS_ALLOC_SYSMSG_HEAP(5, &bp, &off_heap, monitor_p); @@ -3149,10 +3174,10 @@ sys_msg_disp_failure(ErtsSysMsgQ *smqp, Eterm receiver) break; case SYS_MSG_TYPE_SEQTRACE: /* Reset seq_tracer if it hasn't changed */ - erts_smp_mtx_lock(&sys_trace_mtx); + erts_smp_rwmtx_rwlock(&sys_trace_rwmtx); if (system_seq_tracer == receiver) system_seq_tracer = am_false; - erts_smp_mtx_unlock(&sys_trace_mtx); + erts_smp_rwmtx_rwunlock(&sys_trace_rwmtx); break; case SYS_MSG_TYPE_SYSMON: if (receiver == NIL @@ -3407,12 +3432,12 @@ sys_msg_dispatcher_func(void *unused) goto queue_proc_msg; } else if (is_internal_port(receiver)) { - port = erts_id2port(receiver, NULL, 0); - if (INVALID_TRACER_PORT(port, receiver)) { - if (port) - erts_port_release(port); + port = erts_id2port_sflgs(receiver, + NULL, + 0, + ERTS_PORT_SFLGS_INVALID_TRACER_LOOKUP); + if (!port) goto failure; - } else { write_sys_msg_to_port(receiver, port, diff --git a/erts/emulator/beam/erl_unicode.c b/erts/emulator/beam/erl_unicode.c index 6d5eae73b0..049226ab7d 100644 --- a/erts/emulator/beam/erl_unicode.c +++ b/erts/emulator/beam/erl_unicode.c @@ -77,66 +77,25 @@ void erts_init_unicode(void) { max_loop_limit = CONTEXT_REDS * LOOP_FACTOR; /* Non visual BIFs to trap to. */ - memset(&characters_to_utf8_trap_exp, 0, sizeof(Export)); - characters_to_utf8_trap_exp.address = - &characters_to_utf8_trap_exp.code[3]; - characters_to_utf8_trap_exp.code[0] = am_erlang; - characters_to_utf8_trap_exp.code[1] = - am_atom_put("characters_to_utf8_trap",23); - characters_to_utf8_trap_exp.code[2] = 3; - characters_to_utf8_trap_exp.code[3] = - (BeamInstr) em_apply_bif; - characters_to_utf8_trap_exp.code[4] = - (BeamInstr) &characters_to_utf8_trap; - - memset(&characters_to_list_trap_1_exp, 0, sizeof(Export)); - characters_to_list_trap_1_exp.address = - &characters_to_list_trap_1_exp.code[3]; - characters_to_list_trap_1_exp.code[0] = am_erlang; - characters_to_list_trap_1_exp.code[1] = - am_atom_put("characters_to_list_trap_1",25); - characters_to_list_trap_1_exp.code[2] = 3; - characters_to_list_trap_1_exp.code[3] = - (BeamInstr) em_apply_bif; - characters_to_list_trap_1_exp.code[4] = - (BeamInstr) &characters_to_list_trap_1; - - memset(&characters_to_list_trap_2_exp, 0, sizeof(Export)); - characters_to_list_trap_2_exp.address = - &characters_to_list_trap_2_exp.code[3]; - characters_to_list_trap_2_exp.code[0] = am_erlang; - characters_to_list_trap_2_exp.code[1] = - am_atom_put("characters_to_list_trap_2",25); - characters_to_list_trap_2_exp.code[2] = 3; - characters_to_list_trap_2_exp.code[3] = - (BeamInstr) em_apply_bif; - characters_to_list_trap_2_exp.code[4] = - (BeamInstr) &characters_to_list_trap_2; - - - memset(&characters_to_list_trap_3_exp, 0, sizeof(Export)); - characters_to_list_trap_3_exp.address = - &characters_to_list_trap_3_exp.code[3]; - characters_to_list_trap_3_exp.code[0] = am_erlang; - characters_to_list_trap_3_exp.code[1] = - am_atom_put("characters_to_list_trap_3",25); - characters_to_list_trap_3_exp.code[2] = 3; - characters_to_list_trap_3_exp.code[3] = - (BeamInstr) em_apply_bif; - characters_to_list_trap_3_exp.code[4] = - (BeamInstr) &characters_to_list_trap_3; - - memset(&characters_to_list_trap_4_exp, 0, sizeof(Export)); - characters_to_list_trap_4_exp.address = - &characters_to_list_trap_4_exp.code[3]; - characters_to_list_trap_4_exp.code[0] = am_erlang; - characters_to_list_trap_4_exp.code[1] = - am_atom_put("characters_to_list_trap_4",25); - characters_to_list_trap_4_exp.code[2] = 1; - characters_to_list_trap_4_exp.code[3] = - (BeamInstr) em_apply_bif; - characters_to_list_trap_4_exp.code[4] = - (BeamInstr) &characters_to_list_trap_4; + erts_init_trap_export(&characters_to_utf8_trap_exp, + am_erlang, am_atom_put("characters_to_utf8_trap",23), 3, + &characters_to_utf8_trap); + + erts_init_trap_export(&characters_to_list_trap_1_exp, + am_erlang, am_atom_put("characters_to_list_trap_1",25), 3, + &characters_to_list_trap_1); + + erts_init_trap_export(&characters_to_list_trap_2_exp, + am_erlang, am_atom_put("characters_to_list_trap_2",25), 3, + &characters_to_list_trap_2); + + erts_init_trap_export(&characters_to_list_trap_3_exp, + am_erlang, am_atom_put("characters_to_list_trap_3",25), 3, + &characters_to_list_trap_3); + + erts_init_trap_export(&characters_to_list_trap_4_exp, + am_erlang, am_atom_put("characters_to_list_trap_4",25), 1, + &characters_to_list_trap_4); c_to_b_int_trap_exportp = erts_export_put(am_unicode,am_characters_to_binary_int,2); c_to_l_int_trap_exportp = erts_export_put(am_unicode,am_characters_to_list_int,2); diff --git a/erts/emulator/beam/export.c b/erts/emulator/beam/export.c index fb0ee99119..229641cb32 100644 --- a/erts/emulator/beam/export.c +++ b/erts/emulator/beam/export.c @@ -32,98 +32,163 @@ #define EXPORT_HASH(m,f,a) ((m)*(f)+(a)) -static IndexTable export_table; /* Not locked. */ -static Hash secondary_export_table; /* Locked. */ +#ifdef DEBUG +# define IF_DEBUG(x) x +#else +# define IF_DEBUG(x) +#endif -#include "erl_smp.h" +static IndexTable export_tables[ERTS_NUM_CODE_IX]; /* Active not locked */ -static erts_smp_rwmtx_t export_table_lock; /* Locks the secondary export table. */ +static erts_smp_atomic_t total_entries_bytes; -#define export_read_lock() erts_smp_rwmtx_rlock(&export_table_lock) -#define export_read_unlock() erts_smp_rwmtx_runlock(&export_table_lock) -#define export_write_lock() erts_smp_rwmtx_rwlock(&export_table_lock) -#define export_write_unlock() erts_smp_rwmtx_rwunlock(&export_table_lock) +#include "erl_smp.h" + +/* This lock protects the staging export table from concurrent access + * AND it protects the staging table from becoming active. + */ +erts_smp_mtx_t export_staging_lock; extern BeamInstr* em_call_error_handler; extern BeamInstr* em_call_traced_function; +struct export_entry +{ + IndexSlot slot; /* MUST BE LOCATED AT TOP OF STRUCT!!! */ + Export* ep; +}; + +/* Helper struct that brings things together in one allocation +*/ +struct export_blob +{ + Export exp; + struct export_entry entryv[ERTS_NUM_CODE_IX]; + /* Note that entryv is not indexed by "code_ix". + */ +}; + +/* Helper struct only used as template +*/ +struct export_templ +{ + struct export_entry entry; + Export exp; +}; + +static struct export_blob* entry_to_blob(struct export_entry* ee) +{ + return (struct export_blob*) + ((char*)ee->ep - offsetof(struct export_blob,exp)); +} + void export_info(int to, void *to_arg) { #ifdef ERTS_SMP int lock = !ERTS_IS_CRASH_DUMPING; if (lock) - export_read_lock(); + export_staging_lock(); #endif - index_info(to, to_arg, &export_table); - hash_info(to, to_arg, &secondary_export_table); + index_info(to, to_arg, &export_tables[erts_active_code_ix()]); + hash_info(to, to_arg, &export_tables[erts_staging_code_ix()].htable); #ifdef ERTS_SMP if (lock) - export_read_unlock(); + export_staging_unlock(); #endif } static HashValue -export_hash(Export* x) +export_hash(struct export_entry* ee) { + Export* x = ee->ep; return EXPORT_HASH(x->code[0], x->code[1], x->code[2]); } static int -export_cmp(Export* tmpl, Export* obj) +export_cmp(struct export_entry* tmpl_e, struct export_entry* obj_e) { + Export* tmpl = tmpl_e->ep; + Export* obj = obj_e->ep; return !(tmpl->code[0] == obj->code[0] && tmpl->code[1] == obj->code[1] && tmpl->code[2] == obj->code[2]); } -static Export* -export_alloc(Export* tmpl) +static struct export_entry* +export_alloc(struct export_entry* tmpl_e) { - Export* obj = (Export*) erts_alloc(ERTS_ALC_T_EXPORT, sizeof(Export)); - - obj->fake_op_func_info_for_hipe[0] = 0; - obj->fake_op_func_info_for_hipe[1] = 0; - obj->code[0] = tmpl->code[0]; - obj->code[1] = tmpl->code[1]; - obj->code[2] = tmpl->code[2]; - obj->slot.index = -1; - obj->address = obj->code+3; - obj->code[3] = (BeamInstr) em_call_error_handler; - obj->code[4] = 0; - obj->match_prog_set = NULL; - return obj; + struct export_blob* blob; + unsigned ix; + + if (tmpl_e->slot.index == -1) { /* Template, allocate blob */ + Export* tmpl = tmpl_e->ep; + Export* obj; + + blob = (struct export_blob*) erts_alloc(ERTS_ALC_T_EXPORT, sizeof(*blob)); + erts_smp_atomic_add_nob(&total_entries_bytes, sizeof(*blob)); + obj = &blob->exp; + obj->fake_op_func_info_for_hipe[0] = 0; + obj->fake_op_func_info_for_hipe[1] = 0; + obj->code[0] = tmpl->code[0]; + obj->code[1] = tmpl->code[1]; + obj->code[2] = tmpl->code[2]; + obj->code[3] = (BeamInstr) em_call_error_handler; + obj->code[4] = 0; + obj->match_prog_set = NULL; + + for (ix=0; ix<ERTS_NUM_CODE_IX; ix++) { + obj->addressv[ix] = obj->code+3; + + blob->entryv[ix].slot.index = -1; + blob->entryv[ix].ep = &blob->exp; + } + ix = 0; + } + else { /* Existing entry in another table, use free entry in blob */ + blob = entry_to_blob(tmpl_e); + for (ix = 0; blob->entryv[ix].slot.index >= 0; ix++) { + ASSERT(ix < ERTS_NUM_CODE_IX); + } + } + return &blob->entryv[ix]; } - -static void -export_free(Export* obj) +static void +export_free(struct export_entry* obj) { - erts_free(ERTS_ALC_T_EXPORT, (void*) obj); + struct export_blob* blob = entry_to_blob(obj); + int i; + obj->slot.index = -1; + for (i=0; i < ERTS_NUM_CODE_IX; i++) { + if (blob->entryv[i].slot.index >= 0) { + return; + } + } + erts_free(ERTS_ALC_T_EXPORT, blob); + erts_smp_atomic_add_nob(&total_entries_bytes, -sizeof(*blob)); } - void init_export_table(void) { HashFunctions f; - erts_smp_rwmtx_opt_t rwmtx_opt = ERTS_SMP_RWMTX_OPT_DEFAULT_INITER; - rwmtx_opt.type = ERTS_SMP_RWMTX_TYPE_FREQUENT_READ; - rwmtx_opt.lived = ERTS_SMP_RWMTX_LONG_LIVED; + int i; - erts_smp_rwmtx_init_opt(&export_table_lock, &rwmtx_opt, "export_tab"); + erts_smp_mtx_init(&export_staging_lock, "export_tab"); + erts_smp_atomic_init_nob(&total_entries_bytes, 0); f.hash = (H_FUN) export_hash; f.cmp = (HCMP_FUN) export_cmp; f.alloc = (HALLOC_FUN) export_alloc; f.free = (HFREE_FUN) export_free; - erts_index_init(ERTS_ALC_T_EXPORT_TABLE, &export_table, "export_list", - EXPORT_INITIAL_SIZE, EXPORT_LIMIT, f); - hash_init(ERTS_ALC_T_EXPORT_TABLE, &secondary_export_table, - "secondary_export_table", 50, f); + for (i=0; i<ERTS_NUM_CODE_IX; i++) { + erts_index_init(ERTS_ALC_T_EXPORT_TABLE, &export_tables[i], "export_list", + EXPORT_INITIAL_SIZE, EXPORT_LIMIT, f); + } } /* @@ -138,29 +203,42 @@ init_export_table(void) * called through such an export entry. * 3) This function is suitable for the implementation of erlang:apply/3. */ +extern Export* /* inline-helper */ +erts_find_export_entry(Eterm m, Eterm f, unsigned int a,ErtsCodeIndex code_ix); Export* -erts_find_export_entry(Eterm m, Eterm f, unsigned int a) +erts_find_export_entry(Eterm m, Eterm f, unsigned int a, ErtsCodeIndex code_ix) { HashValue hval = EXPORT_HASH((BeamInstr) m, (BeamInstr) f, (BeamInstr) a); int ix; HashBucket* b; - ix = hval % export_table.htable.size; - b = export_table.htable.bucket[ix]; + ix = hval % export_tables[code_ix].htable.size; + b = export_tables[code_ix].htable.bucket[ix]; /* * Note: We have inlined the code from hash.c for speed. */ while (b != (HashBucket*) 0) { - Export* ep = (Export *) b; + Export* ep = ((struct export_entry*) b)->ep; if (ep->code[0] == m && ep->code[1] == f && ep->code[2] == a) { - break; + return ep; } b = b->next; } - return (Export*)b; + return NULL; +} + +static struct export_entry* init_template(struct export_templ* templ, + Eterm m, Eterm f, unsigned a) +{ + templ->entry.ep = &templ->exp; + templ->entry.slot.index = -1; + templ->exp.code[0] = m; + templ->exp.code[1] = f; + templ->exp.code[2] = a; + return &templ->entry; } @@ -176,47 +254,41 @@ erts_find_export_entry(Eterm m, Eterm f, unsigned int a) */ Export* -erts_find_function(Eterm m, Eterm f, unsigned int a) +erts_find_function(Eterm m, Eterm f, unsigned int a, ErtsCodeIndex code_ix) { - Export e; - Export* ep; - - e.code[0] = m; - e.code[1] = f; - e.code[2] = a; + struct export_templ templ; + struct export_entry* ee; - ep = hash_get(&export_table.htable, (void*) &e); - if (ep != NULL && ep->address == ep->code+3 && - ep->code[3] != (BeamInstr) em_call_traced_function) { - ep = NULL; + ee = hash_get(&export_tables[code_ix].htable, init_template(&templ, m, f, a)); + if (ee == NULL || (ee->ep->addressv[code_ix] == ee->ep->code+3 && + ee->ep->code[3] != (BeamInstr) em_call_traced_function)) { + return NULL; } - return ep; + return ee->ep; } /* * Returns a pointer to an existing export entry for a MFA, * or creates a new one and returns the pointer. * - * This function provides unlocked write access to the main export - * table. It should only be used during start up or when - * all other threads are blocked. + * This function acts on the staging export table. It should only be used + * to load new code. */ Export* erts_export_put(Eterm mod, Eterm func, unsigned int arity) { - Export e; - int ix; + ErtsCodeIndex code_ix = erts_staging_code_ix(); + struct export_templ templ; + struct export_entry* ee; - ERTS_SMP_LC_ASSERT(erts_initialized == 0 - || erts_smp_thr_progress_is_blocking()); ASSERT(is_atom(mod)); ASSERT(is_atom(func)); - e.code[0] = mod; - e.code[1] = func; - e.code[2] = arity; - ix = index_put(&export_table, (void*) &e); - return (Export*) erts_index_lookup(&export_table, ix); + export_staging_lock(); + ee = (struct export_entry*) index_put_entry(&export_tables[code_ix], + init_template(&templ, mod, func, arity)); + export_staging_unlock(); + return ee->ep; } /* @@ -224,77 +296,117 @@ erts_export_put(Eterm mod, Eterm func, unsigned int arity) * export entry (making a call through it will cause the error_handler to * be called). * - * Stub export entries will be placed in the secondary export table. - * erts_export_consolidate() will move all stub export entries into the - * main export table (will be done the next time code is loaded). + * Stub export entries will be placed in the loader export table. */ Export* erts_export_get_or_make_stub(Eterm mod, Eterm func, unsigned int arity) { - Export e; + ErtsCodeIndex code_ix; Export* ep; + IF_DEBUG(int retrying = 0;) ASSERT(is_atom(mod)); ASSERT(is_atom(func)); - - e.code[0] = mod; - e.code[1] = func; - e.code[2] = arity; - ep = erts_find_export_entry(mod, func, arity); - if (ep == 0) { - /* - * The code is not loaded (yet). Put the export in the secondary - * export table, to avoid having to lock the main export table. - */ - export_write_lock(); - ep = (Export *) hash_put(&secondary_export_table, (void*) &e); - export_write_unlock(); - } + + do { + code_ix = erts_active_code_ix(); + ep = erts_find_export_entry(mod, func, arity, code_ix); + if (ep == 0) { + /* + * The code is not loaded (yet). Put the export in the staging + * export table, to avoid having to lock the active export table. + */ + export_staging_lock(); + if (erts_active_code_ix() == code_ix) { + struct export_templ templ; + struct export_entry* entry; + + IndexTable* tab = &export_tables[erts_staging_code_ix()]; + init_template(&templ, mod, func, arity); + entry = (struct export_entry *) index_put_entry(tab, &templ.entry); + ep = entry->ep; + ASSERT(ep); + } + else { /* race */ + ASSERT(!retrying); + IF_DEBUG(retrying = 1); + } + export_staging_unlock(); + } + } while (!ep); return ep; } -/* - * To be called before loading code (with other threads blocked). - * This function will move all export entries from the secondary - * export table into the primary. - */ -void -erts_export_consolidate(void) +Export *export_list(int i, ErtsCodeIndex code_ix) { -#ifdef DEBUG - HashInfo hi; -#endif - - ERTS_SMP_LC_ASSERT(erts_initialized == 0 - || erts_smp_thr_progress_is_blocking()); - - export_write_lock(); - erts_index_merge(&secondary_export_table, &export_table); - erts_hash_merge(&secondary_export_table, &export_table.htable); - export_write_unlock(); -#ifdef DEBUG - hash_get_info(&hi, &export_table.htable); - ASSERT(export_table.entries == hi.objs); -#endif + return ((struct export_entry*) erts_index_lookup(&export_tables[code_ix], i))->ep; } -Export *export_list(int i) +int export_list_size(ErtsCodeIndex code_ix) { - return (Export*) erts_index_lookup(&export_table, i); + return export_tables[code_ix].entries; } -int export_list_size(void) +int export_table_sz(void) { - return export_table.entries; + int i, bytes = 0; + + export_staging_lock(); + for (i=0; i<ERTS_NUM_CODE_IX; i++) { + bytes += index_table_sz(&export_tables[i]); + } + export_staging_unlock(); + return bytes; +} +int export_entries_sz(void) +{ + return erts_smp_atomic_read_nob(&total_entries_bytes); +} +Export *export_get(Export *e) +{ + struct export_entry ee; + struct export_entry* entry; + + ee.ep = e; + entry = (struct export_entry*)hash_get(&export_tables[erts_active_code_ix()].htable, &ee); + return entry ? entry->ep : NULL; } -int export_table_sz(void) +IF_DEBUG(static ErtsCodeIndex debug_start_load_ix = 0;) + + +void export_start_staging(void) { - return index_table_sz(&export_table); + ErtsCodeIndex dst_ix = erts_staging_code_ix(); + ErtsCodeIndex src_ix = erts_active_code_ix(); + IndexTable* dst = &export_tables[dst_ix]; + IndexTable* src = &export_tables[src_ix]; + struct export_entry* src_entry; + struct export_entry* dst_entry; + int i; + + ASSERT(dst_ix != src_ix); + ASSERT(debug_start_load_ix == -1); + + export_staging_lock(); + /* + * Insert all entries in src into dst table + */ + for (i = 0; i < src->entries; i++) { + src_entry = (struct export_entry*) erts_index_lookup(src, i); + src_entry->ep->addressv[dst_ix] = src_entry->ep->addressv[src_ix]; + dst_entry = (struct export_entry*) index_put_entry(dst, src_entry); + ASSERT(entry_to_blob(src_entry) == entry_to_blob(dst_entry)); + } + export_staging_unlock(); + + IF_DEBUG(debug_start_load_ix = dst_ix); } -Export *export_get(Export *e) +void export_end_staging(int commit) { - return hash_get(&export_table.htable, e); + ASSERT(debug_start_load_ix == erts_staging_code_ix()); + IF_DEBUG(debug_start_load_ix = -1); } + diff --git a/erts/emulator/beam/export.h b/erts/emulator/beam/export.h index c604fdf7c3..ec9fcb26f2 100644 --- a/erts/emulator/beam/export.h +++ b/erts/emulator/beam/export.h @@ -28,13 +28,15 @@ #include "index.h" #endif +#include "code_ix.h" + /* ** Export entry */ + typedef struct export { - IndexSlot slot; /* MUST BE LOCATED AT TOP OF STRUCT!!! */ - void* address; /* Pointer to code for function. */ + void* addressv[ERTS_NUM_CODE_IX]; /* Pointer to code for function. */ struct binary* match_prog_set; /* Match program for tracing. */ BeamInstr fake_op_func_info_for_hipe[2]; /* MUST be just before code[] */ @@ -59,21 +61,38 @@ typedef struct export void init_export_table(void); void export_info(int, void *); -Export* erts_find_export_entry(Eterm m, Eterm f, unsigned int a); +ERTS_GLB_INLINE Export* erts_active_export_entry(Eterm m, Eterm f, unsigned a); Export* erts_export_put(Eterm mod, Eterm func, unsigned int arity); - Export* erts_export_get_or_make_stub(Eterm, Eterm, unsigned); -void erts_export_consolidate(void); -Export *export_list(int); -int export_list_size(void); +Export *export_list(int,ErtsCodeIndex); +int export_list_size(ErtsCodeIndex); int export_table_sz(void); +int export_entries_sz(void); Export *export_get(Export*); +void export_start_staging(void); +void export_end_staging(int commit); + +extern erts_smp_mtx_t export_staging_lock; +#define export_staging_lock() erts_smp_mtx_lock(&export_staging_lock) +#define export_staging_unlock() erts_smp_mtx_unlock(&export_staging_lock) #include "beam_load.h" /* For em_* extern declarations */ #define ExportIsBuiltIn(EntryPtr) \ -(((EntryPtr)->address == (EntryPtr)->code + 3) && \ +(((EntryPtr)->addressv[erts_active_code_ix()] == (EntryPtr)->code + 3) && \ ((EntryPtr)->code[3] == (BeamInstr) em_apply_bif)) -#endif +#if ERTS_GLB_INLINE_INCL_FUNC_DEF + +ERTS_GLB_INLINE Export* +erts_active_export_entry(Eterm m, Eterm f, unsigned int a) +{ + extern Export* erts_find_export_entry(Eterm m, Eterm f, unsigned a, ErtsCodeIndex); + return erts_find_export_entry(m, f, a, erts_active_code_ix()); +} + +#endif /* ERTS_GLB_INLINE_INCL_FUNC_DEF */ + +#endif /* __EXPORT_H__ */ + diff --git a/erts/emulator/beam/external.c b/erts/emulator/beam/external.c index 4348578694..feb1740649 100644 --- a/erts/emulator/beam/external.c +++ b/erts/emulator/beam/external.c @@ -2562,7 +2562,7 @@ dec_term_atom_common: goto error; } if (edep && (edep->flags & ERTS_DIST_EXT_BTT_SAFE)) { - if (!erts_find_export_entry(mod, name, arity)) + if (!erts_active_export_entry(mod, name, arity)) goto error; } *objp = make_export(hp); diff --git a/erts/emulator/beam/global.h b/erts/emulator/beam/global.h index 1b15c4ac3b..9e387c550f 100755 --- a/erts/emulator/beam/global.h +++ b/erts/emulator/beam/global.h @@ -28,6 +28,7 @@ #include "hash.h" #include "index.h" #include "atom.h" +#include "code_ix.h" #include "export.h" #include "module.h" #include "register.h" @@ -143,8 +144,8 @@ typedef struct ErtsXPortsList_ ErtsXPortsList; struct port { ErtsPortTaskSched sched; ErtsPortTaskHandle timeout_task; -#ifdef ERTS_SMP erts_smp_atomic_t refc; +#ifdef ERTS_SMP erts_smp_mtx_t *lock; ErtsXPortsList *xports; erts_smp_atomic_t run_queue; @@ -197,6 +198,8 @@ erts_port_runq(Port *prt) #ifdef ERTS_SMP ErtsRunQueue *rq1, *rq2; rq1 = (ErtsRunQueue *) erts_smp_atomic_read_nob(&prt->run_queue); + if (!rq1) + return NULL; while (1) { erts_smp_runq_lock(rq1); rq2 = (ErtsRunQueue *) erts_smp_atomic_read_nob(&prt->run_queue); @@ -204,6 +207,8 @@ erts_port_runq(Port *prt) return rq1; erts_smp_runq_unlock(rq1); rq1 = rq2; + if (!rq1) + return NULL; } #else return ERTS_RUNQ_IX(0); @@ -764,6 +769,8 @@ void erts_queue_monitor_message(Process *, Eterm, Eterm, Eterm); +void erts_init_trap_export(Export* ep, Eterm m, Eterm f, Uint a, + Eterm (*bif)(Process*,Eterm*)); void erts_init_bif(void); Eterm erl_send(Process *p, Eterm to, Eterm msg); @@ -786,24 +793,33 @@ typedef struct { Eterm* fname_ptr; /* Pointer to fname table */ } FunctionInfo; -struct LoaderState* erts_alloc_loader_state(void); -Eterm erts_prepare_loading(struct LoaderState*, Process *c_p, +Binary* erts_alloc_loader_state(void); +Eterm erts_module_for_prepared_code(Binary* magic); +Eterm erts_prepare_loading(Binary* loader_state, Process *c_p, Eterm group_leader, Eterm* modp, byte* code, Uint size); -Eterm erts_finish_loading(struct LoaderState* stp, Process* c_p, +Eterm erts_finish_loading(Binary* loader_state, Process* c_p, ErtsProcLocks c_p_locks, Eterm* modp); -Eterm erts_load_module(Process *c_p, ErtsProcLocks c_p_locks, - Eterm group_leader, Eterm* mod, byte* code, Uint size); +Eterm erts_preload_module(Process *c_p, ErtsProcLocks c_p_locks, + Eterm group_leader, Eterm* mod, byte* code, Uint size); void init_load(void); BeamInstr* find_function_from_pc(BeamInstr* pc); Eterm* erts_build_mfa_item(FunctionInfo* fi, Eterm* hp, Eterm args, Eterm* mfa_p); -void erts_lookup_function_info(FunctionInfo* fi, BeamInstr* pc, int full_info); void erts_set_current_function(FunctionInfo* fi, BeamInstr* current); Eterm erts_module_info_0(Process* p, Eterm module); Eterm erts_module_info_1(Process* p, Eterm module, Eterm what); Eterm erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info); +/* beam_ranges.c */ +void erts_init_ranges(void); +void erts_start_staging_ranges(void); +void erts_end_staging_ranges(int commit); +void erts_update_ranges(BeamInstr* code, Uint size); +void erts_remove_from_ranges(BeamInstr* code); +UWord erts_ranges_sz(void); +void erts_lookup_function_info(FunctionInfo* fi, BeamInstr* pc, int full_info); + /* break.c */ void init_break_handler(void); void erts_set_ignore_break(void); @@ -1024,28 +1040,29 @@ erts_smp_port_state_unlock(Port *prt) ERTS_GLB_INLINE int erts_smp_port_trylock(Port *prt) { -#ifdef ERTS_SMP int res; ASSERT(erts_smp_atomic_read_nob(&prt->refc) > 0); erts_smp_atomic_inc_nob(&prt->refc); + +#ifdef ERTS_SMP res = erts_smp_mtx_trylock(prt->lock); if (res == EBUSY) { erts_smp_atomic_dec_nob(&prt->refc); } +#else + res = 0; +#endif return res; -#else /* !ERTS_SMP */ - return 0; -#endif } ERTS_GLB_INLINE void erts_smp_port_lock(Port *prt) { -#ifdef ERTS_SMP ASSERT(erts_smp_atomic_read_nob(&prt->refc) > 0); erts_smp_atomic_inc_nob(&prt->refc); +#ifdef ERTS_SMP erts_smp_mtx_lock(prt->lock); #endif } @@ -1053,14 +1070,14 @@ erts_smp_port_lock(Port *prt) ERTS_GLB_INLINE void erts_smp_port_unlock(Port *prt) { -#ifdef ERTS_SMP erts_aint_t refc; +#ifdef ERTS_SMP erts_smp_mtx_unlock(prt->lock); +#endif refc = erts_smp_atomic_dec_read_nob(&prt->refc); ASSERT(refc >= 0); if (refc == 0) erts_port_cleanup(prt); -#endif } #endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */ @@ -1123,12 +1140,12 @@ erts_id2port_sflgs(Eterm id, Process *c_p, ErtsProcLocks c_p_locks, Uint32 sflgs erts_smp_port_state_unlock(prt); prt = NULL; } -#ifdef ERTS_SMP else { erts_smp_atomic_inc_nob(&prt->refc); erts_smp_port_state_unlock(prt); - if (no_proc_locks) +#ifdef ERTS_SMP + if (no_proc_locks) erts_smp_mtx_lock(prt->lock); else if (erts_smp_mtx_trylock(prt->lock) == EBUSY) { /* Unlock process locks, and acquire locks in lock order... */ @@ -1144,21 +1161,17 @@ erts_id2port_sflgs(Eterm id, Process *c_p, ErtsProcLocks c_p_locks, Uint32 sflgs erts_smp_port_unlock(prt); /* Also decrements refc... */ prt = NULL; } - } #endif + } + return prt; } ERTS_GLB_INLINE void erts_port_release(Port *prt) { -#ifdef ERTS_SMP erts_smp_port_unlock(prt); -#else - if (prt->status & ERTS_PORT_SFLGS_DEAD) - erts_port_cleanup(prt); -#endif } ERTS_GLB_INLINE Port* @@ -1275,6 +1288,122 @@ void erl_drv_thr_init(void); /* utils.c */ +typedef struct { +#ifdef DEBUG + int smp_api; +#endif + union { + Uint64 not_atomic; +#ifdef ARCH_64 + erts_atomic_t atomic; +#else + erts_dw_atomic_t atomic; +#endif + } counter; +} erts_interval_t; + +void erts_interval_init(erts_interval_t *); +void erts_smp_interval_init(erts_interval_t *); +Uint64 erts_step_interval_nob(erts_interval_t *); +Uint64 erts_step_interval_relb(erts_interval_t *); +Uint64 erts_smp_step_interval_nob(erts_interval_t *); +Uint64 erts_smp_step_interval_relb(erts_interval_t *); +Uint64 erts_ensure_later_interval_nob(erts_interval_t *, Uint64); +Uint64 erts_ensure_later_interval_acqb(erts_interval_t *, Uint64); +Uint64 erts_smp_ensure_later_interval_nob(erts_interval_t *, Uint64); +Uint64 erts_smp_ensure_later_interval_acqb(erts_interval_t *, Uint64); +#ifdef ARCH_32 +ERTS_GLB_INLINE Uint64 erts_interval_dw_aint_to_val__(erts_dw_aint_t *); +#endif +ERTS_GLB_INLINE Uint64 erts_current_interval_nob__(erts_interval_t *); +ERTS_GLB_INLINE Uint64 erts_current_interval_acqb__(erts_interval_t *); +ERTS_GLB_INLINE Uint64 erts_current_interval_nob(erts_interval_t *); +ERTS_GLB_INLINE Uint64 erts_current_interval_acqb(erts_interval_t *); +ERTS_GLB_INLINE Uint64 erts_smp_current_interval_nob(erts_interval_t *); +ERTS_GLB_INLINE Uint64 erts_smp_current_interval_acqb(erts_interval_t *); + +#if ERTS_GLB_INLINE_INCL_FUNC_DEF + +#ifdef ARCH_32 + +ERTS_GLB_INLINE Uint64 +erts_interval_dw_aint_to_val__(erts_dw_aint_t *dw) +{ +#ifdef ETHR_SU_DW_NAINT_T__ + return (Uint64) dw->dw_sint; +#else + Uint64 res; + res = (Uint64) ((Uint32) dw->sint[ERTS_DW_AINT_HIGH_WORD]); + res <<= 32; + res |= (Uint64) ((Uint32) dw->sint[ERTS_DW_AINT_LOW_WORD]); + return res; +#endif +} + +#endif + +ERTS_GLB_INLINE Uint64 +erts_current_interval_nob__(erts_interval_t *icp) +{ +#ifdef ARCH_64 + return (Uint64) erts_atomic_read_nob(&icp->counter.atomic); +#else + erts_dw_aint_t dw; + erts_dw_atomic_read_nob(&icp->counter.atomic, &dw); + return erts_interval_dw_aint_to_val__(&dw); +#endif +} + +ERTS_GLB_INLINE Uint64 +erts_current_interval_acqb__(erts_interval_t *icp) +{ +#ifdef ARCH_64 + return (Uint64) erts_atomic_read_acqb(&icp->counter.atomic); +#else + erts_dw_aint_t dw; + erts_dw_atomic_read_acqb(&icp->counter.atomic, &dw); + return erts_interval_dw_aint_to_val__(&dw); +#endif +} + +ERTS_GLB_INLINE Uint64 +erts_current_interval_nob(erts_interval_t *icp) +{ + ASSERT(!icp->smp_api); + return erts_current_interval_nob__(icp); +} + +ERTS_GLB_INLINE Uint64 +erts_current_interval_acqb(erts_interval_t *icp) +{ + ASSERT(!icp->smp_api); + return erts_current_interval_acqb__(icp); +} + +ERTS_GLB_INLINE Uint64 +erts_smp_current_interval_nob(erts_interval_t *icp) +{ + ASSERT(icp->smp_api); +#ifdef ERTS_SMP + return erts_current_interval_nob__(icp); +#else + return icp->counter.not_atomic; +#endif +} + +ERTS_GLB_INLINE Uint64 +erts_smp_current_interval_acqb(erts_interval_t *icp) +{ + ASSERT(icp->smp_api); +#ifdef ERTS_SMP + return erts_current_interval_acqb__(icp); +#else + return icp->counter.not_atomic; +#endif +} + +#endif /* ERTS_GLB_INLINE_INCL_FUNC_DEF */ + /* * To be used to silence unused result warnings, but do not abuse it. */ @@ -1282,9 +1411,10 @@ void erts_silence_warn_unused_result(long unused); void erts_cleanup_offheap(ErlOffHeap *offheap); -Uint erts_fit_in_bits(Uint); +int erts_fit_in_bits_int64(Sint64); +int erts_fit_in_bits_int32(Sint32); int list_length(Eterm); -Export* erts_find_function(Eterm, Eterm, unsigned int); +Export* erts_find_function(Eterm, Eterm, unsigned int, ErtsCodeIndex); int erts_is_builtin(Eterm, Eterm, int); Uint32 make_broken_hash(Eterm); Uint32 block_hash(byte *, unsigned, Uint32); @@ -1562,6 +1692,7 @@ erts_get_default_trace_pattern(int *trace_pattern_is_on, Binary **meta_match_spec, struct trace_pattern_flags *trace_pattern_flags, Eterm *meta_tracer_pid); +int erts_is_default_trace_enabled(void); void erts_bif_trace_init(void); /* @@ -1622,6 +1753,13 @@ extern erts_driver_t spawn_driver; extern erts_driver_t fd_driver; /* Should maybe be placed in erl_message.h, but then we get an include mess. */ +ERTS_GLB_INLINE Eterm * +erts_alloc_message_heap_state(Uint size, + ErlHeapFragment **bpp, + ErlOffHeap **ohpp, + Process *receiver, + ErtsProcLocks *receiver_locks, + erts_aint32_t *statep); ERTS_GLB_INLINE Eterm * erts_alloc_message_heap(Uint size, @@ -1644,16 +1782,22 @@ erts_alloc_message_heap(Uint size, */ ERTS_GLB_INLINE Eterm * -erts_alloc_message_heap(Uint size, - ErlHeapFragment **bpp, - ErlOffHeap **ohpp, - Process *receiver, - ErtsProcLocks *receiver_locks) +erts_alloc_message_heap_state(Uint size, + ErlHeapFragment **bpp, + ErlOffHeap **ohpp, + Process *receiver, + ErtsProcLocks *receiver_locks, + erts_aint32_t *statep) { Eterm *hp; + erts_aint32_t state; #ifdef ERTS_SMP int locked_main = 0; - ErtsProcLocks ulocks = *receiver_locks & ERTS_PROC_LOCKS_MSG_SEND; + state = erts_smp_atomic32_read_acqb(&receiver->state); + if (statep) + *statep = state; + if (state & (ERTS_PSFLG_EXITING|ERTS_PSFLG_PENDING_EXIT)) + goto allocate_in_mbuf; #endif if (size > (Uint) INT_MAX) @@ -1669,20 +1813,19 @@ erts_alloc_message_heap(Uint size, #ifdef ERTS_SMP try_allocate_on_heap: #endif - if (ERTS_PROC_IS_EXITING(receiver) + state = erts_smp_atomic32_read_nob(&receiver->state); + if (statep) + *statep = state; + if ((state & (ERTS_PSFLG_EXITING|ERTS_PSFLG_PENDING_EXIT)) || HEAP_LIMIT(receiver) - HEAP_TOP(receiver) <= size) { #ifdef ERTS_SMP - if (locked_main) - ulocks |= ERTS_PROC_LOCK_MAIN; + if (locked_main) { + *receiver_locks &= ~ERTS_PROC_LOCK_MAIN; + erts_smp_proc_unlock(receiver, ERTS_PROC_LOCK_MAIN); + } #endif goto allocate_in_mbuf; } -#ifdef ERTS_SMP - if (ulocks) { - erts_smp_proc_unlock(receiver, ulocks); - *receiver_locks &= ~ulocks; - } -#endif hp = HEAP_TOP(receiver); HEAP_TOP(receiver) = hp + size; *bpp = NULL; @@ -1698,12 +1841,6 @@ erts_alloc_message_heap(Uint size, else { ErlHeapFragment *bp; allocate_in_mbuf: -#ifdef ERTS_SMP - if (ulocks) { - *receiver_locks &= ~ulocks; - erts_smp_proc_unlock(receiver, ulocks); - } -#endif bp = new_message_buffer(size); hp = bp->mem; *bpp = bp; @@ -1713,6 +1850,17 @@ erts_alloc_message_heap(Uint size, return hp; } +ERTS_GLB_INLINE Eterm * +erts_alloc_message_heap(Uint size, + ErlHeapFragment **bpp, + ErlOffHeap **ohpp, + Process *receiver, + ErtsProcLocks *receiver_locks) +{ + return erts_alloc_message_heap_state(size, bpp, ohpp, receiver, + receiver_locks, NULL); +} + #endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */ #if !HEAP_ON_C_STACK diff --git a/erts/emulator/beam/index.c b/erts/emulator/beam/index.c index a4a3007f93..25d5cce0f3 100644 --- a/erts/emulator/beam/index.c +++ b/erts/emulator/beam/index.c @@ -68,14 +68,14 @@ erts_index_init(ErtsAlcType_t type, IndexTable* t, char* name, return t; } -int -index_put(IndexTable* t, void* tmpl) +IndexSlot* +index_put_entry(IndexTable* t, void* tmpl) { int ix; IndexSlot* p = (IndexSlot*) hash_put(&t->htable, tmpl); if (p->index >= 0) { - return p->index; + return p; } ix = t->entries; @@ -92,7 +92,7 @@ index_put(IndexTable* t, void* tmpl) t->entries++; p->index = ix; t->seg_table[ix>>INDEX_PAGE_SHIFT][ix&INDEX_PAGE_MASK] = p; - return ix; + return p; } int index_get(IndexTable* t, void* tmpl) @@ -135,3 +135,18 @@ void erts_index_merge(Hash* src, IndexTable* dst) } } } + +void index_erase_latest_from(IndexTable* t, Uint from_ix) +{ + if(from_ix < (Uint)t->entries) { + int ix; + for (ix = from_ix; ix < t->entries; ix++) { + IndexSlot* obj = t->seg_table[ix>>INDEX_PAGE_SHIFT][ix&INDEX_PAGE_MASK]; + hash_erase(&t->htable, obj); + } + t->entries = from_ix; + } + else { + ASSERT(from_ix == t->entries); + } +} diff --git a/erts/emulator/beam/index.h b/erts/emulator/beam/index.h index 4eb9b1f992..3afe48d007 100644 --- a/erts/emulator/beam/index.h +++ b/erts/emulator/beam/index.h @@ -55,12 +55,24 @@ void index_info(int, void *, IndexTable*); int index_table_sz(IndexTable *); int index_get(IndexTable*, void*); -int index_put(IndexTable*, void*); + +IndexSlot* index_put_entry(IndexTable*, void*); void erts_index_merge(Hash*, IndexTable*); +/* Erase all entries with index 'ix' and higher +*/ +void index_erase_latest_from(IndexTable*, Uint ix); + +ERTS_GLB_INLINE int index_put(IndexTable*, void*); ERTS_GLB_INLINE IndexSlot* erts_index_lookup(IndexTable*, Uint); #if ERTS_GLB_INLINE_INCL_FUNC_DEF + +ERTS_GLB_INLINE int index_put(IndexTable* t, void* tmpl) +{ + return index_put_entry(t, tmpl)->index; +} + ERTS_GLB_INLINE IndexSlot* erts_index_lookup(IndexTable* t, Uint ix) { diff --git a/erts/emulator/beam/io.c b/erts/emulator/beam/io.c index 204bff299e..845593d0b2 100644 --- a/erts/emulator/beam/io.c +++ b/erts/emulator/beam/io.c @@ -259,10 +259,8 @@ get_free_port(void) } } port->status = ERTS_PORT_SFLG_INITIALIZING; -#ifdef ERTS_SMP - ERTS_SMP_LC_ASSERT(erts_smp_atomic_read_nob(&port->refc) == 0); + ERTS_LC_ASSERT(erts_smp_atomic_read_nob(&port->refc) == 0); erts_smp_atomic_set_nob(&port->refc, 2); /* Port alive + lock */ -#endif erts_smp_port_state_unlock(port); return num & port_num_mask; } @@ -340,10 +338,14 @@ port_cleanup(Port *prt) prt->drv_ptr = NULL; ASSERT(driver); -#ifdef ERTS_SMP - ASSERT(prt->status & ERTS_PORT_SFLG_FREE_SCHEDULED); - ERTS_SMP_LC_ASSERT(erts_smp_atomic_read_nob(&prt->refc) == 0); + ERTS_LC_ASSERT(erts_smp_atomic_read_nob(&prt->refc) == 0); + + ASSERT(prt->status & ERTS_PORT_SFLG_PORT_DEBUG); + ASSERT(!(prt->status & ERTS_PORT_SFLG_FREE)); + prt->status = ERTS_PORT_SFLG_FREE; + +#ifdef ERTS_SMP port_specific = (prt->status & ERTS_PORT_SFLG_PORT_SPECIFIC_LOCK); @@ -352,10 +354,6 @@ port_cleanup(Port *prt) prt->lock = NULL; - ASSERT(prt->status & ERTS_PORT_SFLG_PORT_DEBUG); - ASSERT(!(prt->status & ERTS_PORT_SFLG_FREE)); - prt->status = ERTS_PORT_SFLG_FREE; - erts_smp_port_state_unlock(prt); erts_smp_mtx_unlock(mtx); @@ -606,10 +604,8 @@ erts_open_driver(erts_driver_t* driver, /* Pointer to driver. */ /* Need to mark the port as free again */ erts_smp_port_state_lock(port); port->status = ERTS_PORT_SFLG_FREE; -#ifdef ERTS_SMP - ERTS_SMP_LC_ASSERT(erts_smp_atomic_read_nob(&port->refc) == 2); + ERTS_LC_ASSERT(erts_smp_atomic_read_nob(&port->refc) == 2); erts_smp_atomic_set_nob(&port->refc, 0); -#endif erts_smp_port_state_unlock(port); return -3; } @@ -1330,7 +1326,7 @@ void init_io(void) erts_max_ports = ERTS_MAX_R9_PORTS; } - port_extra_shift = erts_fit_in_bits(erts_max_ports - 1); + port_extra_shift = erts_fit_in_bits_int32(erts_max_ports - 1); port_num_mask = (1 << ports_bits) - 1; erts_port_tab_index_mask = ~(~((Uint) 0) << port_extra_shift); @@ -1354,8 +1350,8 @@ void init_io(void) for (i = 0; i < erts_max_ports; i++) { erts_port_task_init_sched(&erts_port[i].sched); -#ifdef ERTS_SMP erts_smp_atomic_init_nob(&erts_port[i].refc, 0); +#ifdef ERTS_SMP erts_port[i].lock = NULL; erts_port[i].xports = NULL; erts_smp_spinlock_init_x(&erts_port[i].state_lck, @@ -1594,6 +1590,7 @@ deliver_result(Eterm sender, Eterm pid, Eterm res) { Process *rp; ErtsProcLocks rp_locks = 0; + int scheduler = erts_get_scheduler_id() != 0; ERTS_SMP_CHK_NO_PROC_LOCKS; @@ -1601,7 +1598,9 @@ deliver_result(Eterm sender, Eterm pid, Eterm res) && is_internal_pid(pid) && internal_pid_index(pid) < erts_max_processes); - rp = erts_pid2proc_opt(NULL, 0, pid, 0, ERTS_P2P_FLG_SMP_INC_REFC); + rp = (scheduler + ? erts_proc_lookup(pid) + : erts_pid2proc_opt(NULL, 0, pid, 0, ERTS_P2P_FLG_SMP_INC_REFC)); if (rp) { Eterm tuple; @@ -1619,7 +1618,9 @@ deliver_result(Eterm sender, Eterm pid, Eterm res) #endif ); erts_smp_proc_unlock(rp, rp_locks); - erts_smp_proc_dec_refc(rp); + if (!scheduler) + erts_smp_proc_dec_refc(rp); + } } @@ -1644,6 +1645,7 @@ static void deliver_read_message(Port* prt, Eterm to, ErlHeapFragment *bp; ErlOffHeap *ohp; ErtsProcLocks rp_locks = 0; + int scheduler = erts_get_scheduler_id() != 0; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); ERTS_SMP_CHK_NO_PROC_LOCKS; @@ -1658,7 +1660,10 @@ static void deliver_read_message(Port* prt, Eterm to, need += 2*len; } - rp = erts_pid2proc_opt(NULL, 0, to, 0, ERTS_P2P_FLG_SMP_INC_REFC); + rp = (scheduler + ? erts_proc_lookup(to) + : erts_pid2proc_opt(NULL, 0, to, 0, ERTS_P2P_FLG_SMP_INC_REFC)); + if (!rp) return; @@ -1711,8 +1716,10 @@ static void deliver_read_message(Port* prt, Eterm to, , NIL #endif ); - erts_smp_proc_unlock(rp, rp_locks); - erts_smp_proc_dec_refc(rp); + if (rp_locks) + erts_smp_proc_unlock(rp, rp_locks); + if (!scheduler) + erts_smp_proc_dec_refc(rp); } /* @@ -1779,6 +1786,7 @@ deliver_vec_message(Port* prt, /* Port */ ErlHeapFragment *bp; ErlOffHeap *ohp; ErtsProcLocks rp_locks = 0; + int scheduler = erts_get_scheduler_id() != 0; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); ERTS_SMP_CHK_NO_PROC_LOCKS; @@ -1787,7 +1795,10 @@ deliver_vec_message(Port* prt, /* Port */ * Check arguments for validity. */ - rp = erts_pid2proc_opt(NULL, 0, to, 0, ERTS_P2P_FLG_SMP_INC_REFC); + + rp = (scheduler + ? erts_proc_lookup(to) + : erts_pid2proc_opt(NULL, 0, to, 0, ERTS_P2P_FLG_SMP_INC_REFC)); if (!rp) return; @@ -1869,7 +1880,8 @@ deliver_vec_message(Port* prt, /* Port */ #endif ); erts_smp_proc_unlock(rp, rp_locks); - erts_smp_proc_dec_refc(rp); + if (!scheduler) + erts_smp_proc_dec_refc(rp); } @@ -2277,9 +2289,8 @@ void erts_port_command(Process *proc, { ErtsProcLocks rp_locks = ERTS_PROC_LOCKS_XSIG_SEND; - Process* rp = erts_pid2proc_opt(NULL, 0, - port->connected, rp_locks, - ERTS_P2P_FLG_SMP_INC_REFC); + Process* rp = erts_pid2proc(NULL, 0, + port->connected, rp_locks); if (rp) { (void) erts_send_exit_signal(NULL, port->id, @@ -2290,7 +2301,6 @@ void erts_port_command(Process *proc, NULL, 0); erts_smp_proc_unlock(rp, rp_locks); - erts_smp_proc_dec_refc(rp); } } @@ -2841,13 +2851,17 @@ void driver_report_exit(int ix, int status) ErlHeapFragment *bp = NULL; ErlOffHeap *ohp; ErtsProcLocks rp_locks = 0; + int scheduler = erts_get_scheduler_id() != 0; ERTS_SMP_CHK_NO_PROC_LOCKS; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); pid = prt->connected; ASSERT(is_internal_pid(pid)); - rp = erts_pid2proc_opt(NULL, 0, pid, 0, ERTS_P2P_FLG_SMP_INC_REFC); + + rp = (scheduler + ? erts_proc_lookup(pid) + : erts_pid2proc_opt(NULL, 0, pid, 0, ERTS_P2P_FLG_SMP_INC_REFC)); if (!rp) return; @@ -2864,7 +2878,8 @@ void driver_report_exit(int ix, int status) ); erts_smp_proc_unlock(rp, rp_locks); - erts_smp_proc_dec_refc(rp); + if (!scheduler) + erts_smp_proc_dec_refc(rp); } @@ -2995,6 +3010,7 @@ driver_deliver_term(ErlDrvPort port, ErlOffHeap *ohp; ErtsProcLocks rp_locks = 0; struct b2t_states__ b2t; + int scheduler = 1; /* Silence erroneous warning... */ init_b2t_states(&b2t); @@ -3186,7 +3202,13 @@ driver_deliver_term(ErlDrvPort port, if (res <= 0) goto done; - rp = erts_pid2proc_opt(NULL, 0, to, rp_locks, ERTS_P2P_FLG_SMP_INC_REFC); + /* + * Increase refc on proc if done from a non-scheduler thread. + */ + scheduler = erts_get_scheduler_id() != 0; + rp = (scheduler + ? erts_proc_lookup(to) + : erts_pid2proc_opt(NULL, 0, to, 0, ERTS_P2P_FLG_SMP_INC_REFC)); if (!rp) { res = 0; goto done; @@ -3438,7 +3460,8 @@ driver_deliver_term(ErlDrvPort port, if (rp) { if (rp_locks) erts_smp_proc_unlock(rp, rp_locks); - erts_smp_proc_dec_refc(rp); + if (!scheduler) + erts_smp_proc_dec_refc(rp); } #endif cleanup_b2t_states(&b2t); diff --git a/erts/emulator/beam/module.c b/erts/emulator/beam/module.c index b93b1ad09a..1ef71cda79 100644 --- a/erts/emulator/beam/module.c +++ b/erts/emulator/beam/module.c @@ -26,21 +26,32 @@ #include "global.h" #include "module.h" +#ifdef DEBUG +# define IF_DEBUG(x) x +#else +# define IF_DEBUG(x) +#endif + #define MODULE_SIZE 50 #define MODULE_LIMIT (64*1024) -static IndexTable module_table; +static IndexTable module_tables[ERTS_NUM_CODE_IX]; -/* - * SMP note: We don't need to look accesses to the module table because - * there is one only scheduler thread when we update it. +erts_smp_rwmtx_t the_old_code_rwlocks[ERTS_NUM_CODE_IX]; + +static erts_smp_atomic_t tot_module_bytes; + +/* SMP note: Active module table lookup and current module instance can be + * read without any locks. Old module instances are protected by + * "the_old_code_rwlocks" as purging is done on active module table. + * Staging table is protected by the "code_ix lock". */ #include "erl_smp.h" void module_info(int to, void *to_arg) { - index_info(to, to_arg, &module_table); + index_info(to, to_arg, &module_tables[erts_active_code_ix()]); } @@ -59,45 +70,67 @@ static int module_cmp(Module* tmpl, Module* obj) static Module* module_alloc(Module* tmpl) { Module* obj = (Module*) erts_alloc(ERTS_ALC_T_MODULE, sizeof(Module)); + erts_smp_atomic_add_nob(&tot_module_bytes, sizeof(Module)); obj->module = tmpl->module; - obj->code = 0; - obj->old_code = 0; - obj->code_length = 0; - obj->old_code_length = 0; + obj->curr.code = 0; + obj->old.code = 0; + obj->curr.code_length = 0; + obj->old.code_length = 0; obj->slot.index = -1; - obj->nif = NULL; - obj->old_nif = NULL; + obj->curr.nif = NULL; + obj->old.nif = NULL; + obj->curr.num_breakpoints = 0; + obj->old.num_breakpoints = 0; + obj->curr.num_traced_exports = 0; + obj->old.num_traced_exports = 0; return obj; } +static void module_free(Module* mod) +{ + erts_free(ERTS_ALC_T_MODULE, mod); + erts_smp_atomic_add_nob(&tot_module_bytes, -sizeof(Module)); +} void init_module_table(void) { HashFunctions f; + int i; f.hash = (H_FUN) module_hash; f.cmp = (HCMP_FUN) module_cmp; f.alloc = (HALLOC_FUN) module_alloc; - f.free = 0; + f.free = (HFREE_FUN) module_free; + + for (i = 0; i < ERTS_NUM_CODE_IX; i++) { + erts_index_init(ERTS_ALC_T_MODULE_TABLE, &module_tables[i], "module_code", + MODULE_SIZE, MODULE_LIMIT, f); + } - erts_index_init(ERTS_ALC_T_MODULE_TABLE, &module_table, "module_code", - MODULE_SIZE, MODULE_LIMIT, f); + for (i=0; i<ERTS_NUM_CODE_IX; i++) { + erts_smp_rwmtx_init_x(&the_old_code_rwlocks[i], "old_code", make_small(i)); + } + erts_smp_atomic_init_nob(&tot_module_bytes, 0); } Module* -erts_get_module(Eterm mod) +erts_get_module(Eterm mod, ErtsCodeIndex code_ix) { Module e; int index; + IndexTable* mod_tab; ASSERT(is_atom(mod)); + + mod_tab = &module_tables[code_ix]; + e.module = atom_val(mod); - index = index_get(&module_table, (void*) &e); + index = index_get(mod_tab, (void*) &e); if (index == -1) { return NULL; } else { - return (Module*) erts_index_lookup(&module_table, index); + return (Module*) erts_index_lookup(mod_tab, index); } } @@ -105,27 +138,101 @@ Module* erts_put_module(Eterm mod) { Module e; - int index; + IndexTable* mod_tab; + int oldsz, newsz; + Module* res; ASSERT(is_atom(mod)); ERTS_SMP_LC_ASSERT(erts_initialized == 0 - || erts_smp_thr_progress_is_blocking()); + || erts_is_code_ix_locked()); + + mod_tab = &module_tables[erts_staging_code_ix()]; e.module = atom_val(mod); - index = index_put(&module_table, (void*) &e); - return (Module*) erts_index_lookup(&module_table, index); + oldsz = index_table_sz(mod_tab); + res = (Module*) index_put_entry(mod_tab, (void*) &e); + newsz = index_table_sz(mod_tab); + erts_smp_atomic_add_nob(&tot_module_bytes, (newsz - oldsz)); + return res; } -Module *module_code(int i) +Module *module_code(int i, ErtsCodeIndex code_ix) { - return (Module*) erts_index_lookup(&module_table, i); + return (Module*) erts_index_lookup(&module_tables[code_ix], i); } -int module_code_size(void) +int module_code_size(ErtsCodeIndex code_ix) { - return module_table.entries; + return module_tables[code_ix].entries; } int module_table_sz(void) { - return index_table_sz(&module_table); + return erts_smp_atomic_read_nob(&tot_module_bytes); +} + +#ifdef DEBUG +static ErtsCodeIndex dbg_load_code_ix = 0; +#endif + +static int entries_at_start_staging = 0; + +void module_start_staging(void) +{ + IndexTable* src = &module_tables[erts_active_code_ix()]; + IndexTable* dst = &module_tables[erts_staging_code_ix()]; + Module* src_mod; + Module* dst_mod; + int i, oldsz, newsz; + + ASSERT(dbg_load_code_ix == -1); + ASSERT(dst->entries <= src->entries); + + /* + * Make sure our existing modules are up-to-date + */ + for (i = 0; i < dst->entries; i++) { + src_mod = (Module*) erts_index_lookup(src, i); + dst_mod = (Module*) erts_index_lookup(dst, i); + ASSERT(src_mod->module == dst_mod->module); + + dst_mod->curr = src_mod->curr; + dst_mod->old = src_mod->old; + } + + /* + * Copy all new modules from active table + */ + oldsz = index_table_sz(dst); + for (i = dst->entries; i < src->entries; i++) { + src_mod = (Module*) erts_index_lookup(src, i); + dst_mod = (Module*) index_put_entry(dst, src_mod); + ASSERT(dst_mod != src_mod); + + dst_mod->curr = src_mod->curr; + dst_mod->old = src_mod->old; + } + newsz = index_table_sz(dst); + erts_smp_atomic_add_nob(&tot_module_bytes, (newsz - oldsz)); + + entries_at_start_staging = dst->entries; + IF_DEBUG(dbg_load_code_ix = erts_staging_code_ix()); +} + +void module_end_staging(int commit) +{ + ASSERT(dbg_load_code_ix == erts_staging_code_ix()); + + if (!commit) { /* abort */ + IndexTable* tab = &module_tables[erts_staging_code_ix()]; + int oldsz, newsz; + + ASSERT(entries_at_start_staging <= tab->entries); + oldsz = index_table_sz(tab); + index_erase_latest_from(tab, entries_at_start_staging); + newsz = index_table_sz(tab); + erts_smp_atomic_add_nob(&tot_module_bytes, (newsz - oldsz)); + } + + IF_DEBUG(dbg_load_code_ix = -1); } + diff --git a/erts/emulator/beam/module.h b/erts/emulator/beam/module.h index 694e4ab72f..6e123a0ffe 100644 --- a/erts/emulator/beam/module.h +++ b/erts/emulator/beam/module.h @@ -24,28 +24,72 @@ #include "index.h" #endif +struct erl_module_instance { + BeamInstr* code; + int code_length; /* Length of loaded code in bytes. */ + unsigned catches; + struct erl_module_nif* nif; + int num_breakpoints; + int num_traced_exports; +}; typedef struct erl_module { IndexSlot slot; /* Must be located at top of struct! */ int module; /* Atom index for module (not tagged). */ - BeamInstr* code; - BeamInstr* old_code; - int code_length; /* Length of loaded code in bytes. */ - int old_code_length; /* Length of old loaded code in bytes */ - unsigned catches, old_catches; - struct erl_module_nif* nif; - struct erl_module_nif* old_nif; + struct erl_module_instance curr; + struct erl_module_instance old; /* protected by "old_code" rwlock */ } Module; -Module* erts_get_module(Eterm mod); +Module* erts_get_module(Eterm mod, ErtsCodeIndex code_ix); Module* erts_put_module(Eterm mod); void init_module_table(void); +void module_start_staging(void); +void module_end_staging(int commit); void module_info(int, void *); -Module *module_code(int); -int module_code_size(void); +Module *module_code(int, ErtsCodeIndex); +int module_code_size(ErtsCodeIndex); int module_table_sz(void); +ERTS_GLB_INLINE void erts_rwlock_old_code(ErtsCodeIndex); +ERTS_GLB_INLINE void erts_rwunlock_old_code(ErtsCodeIndex); +ERTS_GLB_INLINE void erts_rlock_old_code(ErtsCodeIndex); +ERTS_GLB_INLINE void erts_runlock_old_code(ErtsCodeIndex); +#ifdef ERTS_ENABLE_LOCK_CHECK +int erts_is_old_code_rlocked(ErtsCodeIndex); +#endif + +#if ERTS_GLB_INLINE_INCL_FUNC_DEF + +extern erts_smp_rwmtx_t the_old_code_rwlocks[ERTS_NUM_CODE_IX]; + +ERTS_GLB_INLINE void erts_rwlock_old_code(ErtsCodeIndex code_ix) +{ + erts_smp_rwmtx_rwlock(&the_old_code_rwlocks[code_ix]); +} +ERTS_GLB_INLINE void erts_rwunlock_old_code(ErtsCodeIndex code_ix) +{ + erts_smp_rwmtx_rwunlock(&the_old_code_rwlocks[code_ix]); +} +ERTS_GLB_INLINE void erts_rlock_old_code(ErtsCodeIndex code_ix) +{ + erts_smp_rwmtx_rlock(&the_old_code_rwlocks[code_ix]); +} +ERTS_GLB_INLINE void erts_runlock_old_code(ErtsCodeIndex code_ix) +{ + erts_smp_rwmtx_runlock(&the_old_code_rwlocks[code_ix]); +} + +#ifdef ERTS_ENABLE_LOCK_CHECK +ERTS_GLB_INLINE int erts_is_old_code_rlocked(ErtsCodeIndex code_ix) +{ + return erts_smp_lc_rwmtx_is_rlocked(&the_old_code_rwlocks[code_ix]); +} #endif + +#endif /* ERTS_GLB_INLINE_INCL_FUNC_DEF */ + + +#endif /* !__MODULE_H__ */ diff --git a/erts/emulator/beam/ops.tab b/erts/emulator/beam/ops.tab index 9b168889dd..c58b36231c 100644 --- a/erts/emulator/beam/ops.tab +++ b/erts/emulator/beam/ops.tab @@ -829,16 +829,20 @@ call_ext_only Ar=u==2 Bif=u$bif:erlang:load_nif/2 => allocate u Ar | i_call_ext # -# The apply/2 and apply/3 BIFs are instructions. +# apply/2 is an instruction, not a BIF. # call_ext u==2 u$func:erlang:apply/2 => i_apply_fun call_ext_last u==2 u$func:erlang:apply/2 D => i_apply_fun_last D call_ext_only u==2 u$func:erlang:apply/2 => i_apply_fun_only -call_ext u==3 u$func:erlang:apply/3 => i_apply -call_ext_last u==3 u$func:erlang:apply/3 D => i_apply_last D -call_ext_only u==3 u$func:erlang:apply/3 => i_apply_only +# +# The apply/3 BIF is an instruction. +# + +call_ext u==3 u$bif:erlang:apply/3 => i_apply +call_ext_last u==3 u$bif:erlang:apply/3 D => i_apply_last D +call_ext_only u==3 u$bif:erlang:apply/3 => i_apply_only # # The exit/1 and throw/1 BIFs never execute the instruction following them; diff --git a/erts/emulator/beam/register.c b/erts/emulator/beam/register.c index 26d64887d0..c02872ef80 100644 --- a/erts/emulator/beam/register.c +++ b/erts/emulator/beam/register.c @@ -93,19 +93,14 @@ reg_safe_write_lock(Process *c_p, ErtsProcLocks *c_p_locks) reg_write_lock(); } +#endif + static ERTS_INLINE int is_proc_alive(Process *p) { - int res; - erts_pix_lock_t *pixlck = ERTS_PID2PIXLOCK(p->id); - erts_pix_lock(pixlck); - res = !p->is_exiting; - erts_pix_unlock(pixlck); - return res; + return !ERTS_PROC_IS_EXITING(p); } -#endif - void register_info(int to, void *to_arg) { int lock = !ERTS_IS_CRASH_DUMPING; @@ -389,8 +384,7 @@ erts_whereis_name(Process *c_p, } #else if (rp->p - && ((flags & ERTS_P2P_FLG_ALLOW_OTHER_X) - || rp->p->status != P_EXITING)) + && ((flags & ERTS_P2P_FLG_ALLOW_OTHER_X) || is_proc_alive(rp->p))) *proc = rp->p; else *proc = NULL; @@ -402,7 +396,9 @@ erts_whereis_name(Process *c_p, if (!rp || !rp->pt) *port = NULL; else { -#ifdef ERTS_SMP +#ifndef ERTS_SMP + erts_smp_atomic_inc_nob(&rp->pt->refc); +#else if (pending_port == rp->pt) pending_port = NULL; else { @@ -509,9 +505,11 @@ int erts_unregister_name(Process *c_p, if ((rp = (RegProc*) hash_get(&process_reg, (void*) &r)) != NULL) { if (rp->pt) { if (port != rp->pt) { -#ifdef ERTS_SMP +#ifndef ERTS_SMP + erts_smp_atomic_inc_nob(&rp->pt->refc); +#else if (port) { - ERTS_SMP_LC_ASSERT(port != c_prt); + ASSERT(port != c_prt); erts_smp_port_unlock(port); port = NULL; } diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h index 7b2bb81f62..0d3b910278 100644 --- a/erts/emulator/beam/sys.h +++ b/erts/emulator/beam/sys.h @@ -39,6 +39,8 @@ #define ENABLE_CHILD_WAITER_THREAD 1 #endif +#define ERTS_I64_LITERAL(X) X##LL + #if defined (__WIN32__) # include "erl_win_sys.h" #elif defined (VXWORKS) @@ -91,14 +93,22 @@ typedef ERTS_SYS_FD_TYPE ErtsSysFdType; # endif #endif -#ifdef __GNUC__ -# if __GNUC__ < 3 && (__GNUC__ != 2 || __GNUC_MINOR__ < 96) -# define ERTS_LIKELY(BOOL) (BOOL) -# define ERTS_UNLIKELY(BOOL) (BOOL) -# else -# define ERTS_LIKELY(BOOL) __builtin_expect((BOOL), !0) -# define ERTS_UNLIKELY(BOOL) __builtin_expect((BOOL), 0) -# endif +#if !defined(__GNUC__) +# define ERTS_AT_LEAST_GCC_VSN__(MAJ, MIN, PL) 0 +#elif !defined(__GNUC_MINOR__) +# define ERTS_AT_LEAST_GCC_VSN__(MAJ, MIN, PL) \ + ((__GNUC__ << 24) >= (((MAJ) << 24) | ((MIN) << 12) | (PL))) +#elif !defined(__GNUC_PATCHLEVEL__) +# define ERTS_AT_LEAST_GCC_VSN__(MAJ, MIN, PL) \ + (((__GNUC__ << 24) | (__GNUC_MINOR__ << 12)) >= (((MAJ) << 24) | ((MIN) << 12) | (PL))) +#else +# define ERTS_AT_LEAST_GCC_VSN__(MAJ, MIN, PL) \ + (((__GNUC__ << 24) | (__GNUC_MINOR__ << 12) | __GNUC_PATCHLEVEL__) >= (((MAJ) << 24) | ((MIN) << 12) | (PL))) +#endif + +#if ERTS_AT_LEAST_GCC_VSN__(2, 96, 0) +# define ERTS_LIKELY(BOOL) __builtin_expect((BOOL), !0) +# define ERTS_UNLIKELY(BOOL) __builtin_expect((BOOL), 0) #else # define ERTS_LIKELY(BOOL) (BOOL) # define ERTS_UNLIKELY(BOOL) (BOOL) @@ -178,6 +188,18 @@ int real_printf(const char *fmt, ...); # define printf real_printf #endif +#undef __deprecated +#if ERTS_AT_LEAST_GCC_VSN__(3, 0, 0) +# define __deprecated __attribute__((deprecated)) +#else +# define __deprecated +#endif +#if ERTS_AT_LEAST_GCC_VSN__(3, 0, 4) +# define erts_align_attribute(SZ) __attribute__ ((aligned (SZ))) +#else +# define erts_align_attribute(SZ) +#endif + /* In VC++, noreturn is a declspec that has to be before the types, * but in GNUC it is an att ribute to be placed between return type * and function name, hence __decl_noreturn <types> __noreturn <function name> @@ -185,12 +207,6 @@ int real_printf(const char *fmt, ...); #if __GNUC__ # define __decl_noreturn # define __noreturn __attribute__((noreturn)) -# undef __deprecated -# if __GNUC__ >= 3 -# define __deprecated __attribute__((deprecated)) -# else -# define __deprecated -# endif #else # if defined(__WIN32__) && defined(_MSC_VER) # define __noreturn @@ -199,7 +215,6 @@ int real_printf(const char *fmt, ...); # define __noreturn # define __decl_noreturn # endif -# define __deprecated #endif /* diff --git a/erts/emulator/beam/utils.c b/erts/emulator/beam/utils.c index a36d15204e..db6597dc7c 100644 --- a/erts/emulator/beam/utils.c +++ b/erts/emulator/beam/utils.c @@ -268,16 +268,42 @@ list_length(Eterm list) return i; } -Uint erts_fit_in_bits(Uint n) +static const struct { + Sint64 mask; + int bits; +} fib_data[] = {{ERTS_I64_LITERAL(0x2), 1}, + {ERTS_I64_LITERAL(0xc), 2}, + {ERTS_I64_LITERAL(0xf0), 4}, + {ERTS_I64_LITERAL(0xff00), 8}, + {ERTS_I64_LITERAL(0xffff0000), 16}, + {ERTS_I64_LITERAL(0xffffffff00000000), 32}}; + +static ERTS_INLINE int +fit_in_bits(Sint64 value, int start) { - Uint i; + int bits = 0; + int i; - i = 0; - while (n > 0) { - i++; - n >>= 1; - } - return i; + for (i = start; i >= 0; i--) { + if (value & fib_data[i].mask) { + value >>= fib_data[i].bits; + bits |= fib_data[i].bits; + } + } + + bits++; + + return bits; +} + +int erts_fit_in_bits_int64(Sint64 value) +{ + return fit_in_bits(value, 5); +} + +int erts_fit_in_bits_int32(Sint32 value) +{ + return fit_in_bits((Sint64) (Uint32) value, 4); } int @@ -1640,12 +1666,20 @@ static int do_send_to_logger(Eterm tag, Eterm gleader, char *buf, int len) } #ifndef ERTS_SMP - if ( #ifdef USE_THREADS - !erts_get_scheduler_data() || /* Must be scheduler thread */ + p = NULL; + if (erts_get_scheduler_data()) /* Must be scheduler thread */ #endif - (p = erts_whereis_process(NULL, 0, am_error_logger, 0, 0)) == NULL - || p->status == P_RUNNING) { + { + p = erts_whereis_process(NULL, 0, am_error_logger, 0, 0); + if (p) { + erts_aint32_t state = erts_smp_atomic32_read_acqb(&p->state); + if (state & ERTS_PSFLG_RUNNING) + p = NULL; + } + } + + if (!p) { /* buf *always* points to a null terminated string */ erts_fprintf(stderr, "(no error logger present) %T: \"%s\"\n", tag, buf); @@ -3240,7 +3274,7 @@ ptimer_timeout(ErtsSmpPTimer *ptimer) ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS, ERTS_P2P_FLG_ALLOW_OTHER_X); if (p) { - if (!p->is_exiting + if (!ERTS_PROC_IS_EXITING(p) && !(ptimer->timer.flags & ERTS_PTMR_FLG_CANCELLED)) { ASSERT(*ptimer->timer.timer_ref == ptimer); *ptimer->timer.timer_ref = NULL; @@ -3458,6 +3492,254 @@ void erts_silence_warn_unused_result(long unused) } +/* + * Interval counts + */ +void +erts_interval_init(erts_interval_t *icp) +{ +#ifdef ARCH_64 + erts_atomic_init_nob(&icp->counter.atomic, 0); +#else + erts_dw_aint_t dw; +#ifdef ETHR_SU_DW_NAINT_T__ + dw.dw_sint = 0; +#else + dw.sint[ERTS_DW_AINT_HIGH_WORD] = 0; + dw.sint[ERTS_DW_AINT_LOW_WORD] = 0; +#endif + erts_dw_atomic_init_nob(&icp->counter.atomic, &dw); + +#endif +#ifdef DEBUG + icp->smp_api = 0; +#endif +} + +void +erts_smp_interval_init(erts_interval_t *icp) +{ +#ifdef ERTS_SMP + erts_interval_init(icp); +#else + icp->counter.not_atomic = 0; +#endif +#ifdef DEBUG + icp->smp_api = 1; +#endif +} + +static ERTS_INLINE Uint64 +step_interval_nob(erts_interval_t *icp) +{ +#ifdef ARCH_64 + return (Uint64) erts_atomic_inc_read_nob(&icp->counter.atomic); +#else + erts_dw_aint_t exp; + + erts_dw_atomic_read_nob(&icp->counter.atomic, &exp); + while (1) { + erts_dw_aint_t new = exp; + +#ifdef ETHR_SU_DW_NAINT_T__ + new.dw_sint++; +#else + new.sint[ERTS_DW_AINT_LOW_WORD]++; + if (new.sint[ERTS_DW_AINT_LOW_WORD] == 0) + new.sint[ERTS_DW_AINT_HIGH_WORD]++; +#endif + + if (erts_dw_atomic_cmpxchg_nob(&icp->counter.atomic, &new, &exp)) + return erts_interval_dw_aint_to_val__(&new); + + } +#endif +} + +static ERTS_INLINE Uint64 +step_interval_relb(erts_interval_t *icp) +{ +#ifdef ARCH_64 + return (Uint64) erts_atomic_inc_read_relb(&icp->counter.atomic); +#else + erts_dw_aint_t exp; + + erts_dw_atomic_read_nob(&icp->counter.atomic, &exp); + while (1) { + erts_dw_aint_t new = exp; + +#ifdef ETHR_SU_DW_NAINT_T__ + new.dw_sint++; +#else + new.sint[ERTS_DW_AINT_LOW_WORD]++; + if (new.sint[ERTS_DW_AINT_LOW_WORD] == 0) + new.sint[ERTS_DW_AINT_HIGH_WORD]++; +#endif + + if (erts_dw_atomic_cmpxchg_relb(&icp->counter.atomic, &new, &exp)) + return erts_interval_dw_aint_to_val__(&new); + + } +#endif +} + + +static ERTS_INLINE Uint64 +ensure_later_interval_nob(erts_interval_t *icp, Uint64 ic) +{ + Uint64 curr_ic; +#ifdef ARCH_64 + curr_ic = (Uint64) erts_atomic_read_nob(&icp->counter.atomic); + if (curr_ic > ic) + return curr_ic; + return (Uint64) erts_atomic_inc_read_nob(&icp->counter.atomic); +#else + erts_dw_aint_t exp; + + erts_dw_atomic_read_nob(&icp->counter.atomic, &exp); + curr_ic = erts_interval_dw_aint_to_val__(&exp); + if (curr_ic > ic) + return curr_ic; + + while (1) { + erts_dw_aint_t new = exp; + +#ifdef ETHR_SU_DW_NAINT_T__ + new.dw_sint++; +#else + new.sint[ERTS_DW_AINT_LOW_WORD]++; + if (new.sint[ERTS_DW_AINT_LOW_WORD] == 0) + new.sint[ERTS_DW_AINT_HIGH_WORD]++; +#endif + + if (erts_dw_atomic_cmpxchg_nob(&icp->counter.atomic, &new, &exp)) + return erts_interval_dw_aint_to_val__(&new); + + curr_ic = erts_interval_dw_aint_to_val__(&exp); + if (curr_ic > ic) + return curr_ic; + } +#endif +} + + +static ERTS_INLINE Uint64 +ensure_later_interval_acqb(erts_interval_t *icp, Uint64 ic) +{ + Uint64 curr_ic; +#ifdef ARCH_64 + curr_ic = (Uint64) erts_atomic_read_acqb(&icp->counter.atomic); + if (curr_ic > ic) + return curr_ic; + return (Uint64) erts_atomic_inc_read_acqb(&icp->counter.atomic); +#else + erts_dw_aint_t exp; + + erts_dw_atomic_read_acqb(&icp->counter.atomic, &exp); + curr_ic = erts_interval_dw_aint_to_val__(&exp); + if (curr_ic > ic) + return curr_ic; + + while (1) { + erts_dw_aint_t new = exp; + +#ifdef ETHR_SU_DW_NAINT_T__ + new.dw_sint++; +#else + new.sint[ERTS_DW_AINT_LOW_WORD]++; + if (new.sint[ERTS_DW_AINT_LOW_WORD] == 0) + new.sint[ERTS_DW_AINT_HIGH_WORD]++; +#endif + + if (erts_dw_atomic_cmpxchg_acqb(&icp->counter.atomic, &new, &exp)) + return erts_interval_dw_aint_to_val__(&new); + + curr_ic = erts_interval_dw_aint_to_val__(&exp); + if (curr_ic > ic) + return curr_ic; + } +#endif +} + +Uint64 +erts_step_interval_nob(erts_interval_t *icp) +{ + ASSERT(!icp->smp_api); + return step_interval_nob(icp); +} + +Uint64 +erts_step_interval_relb(erts_interval_t *icp) +{ + ASSERT(!icp->smp_api); + return step_interval_relb(icp); +} + +Uint64 +erts_smp_step_interval_nob(erts_interval_t *icp) +{ + ASSERT(icp->smp_api); +#ifdef ERTS_SMP + return step_interval_nob(icp); +#else + return ++icp->counter.not_atomic; +#endif +} + +Uint64 +erts_smp_step_interval_relb(erts_interval_t *icp) +{ + ASSERT(icp->smp_api); +#ifdef ERTS_SMP + return step_interval_relb(icp); +#else + return ++icp->counter.not_atomic; +#endif +} + +Uint64 +erts_ensure_later_interval_nob(erts_interval_t *icp, Uint64 ic) +{ + ASSERT(!icp->smp_api); + return ensure_later_interval_nob(icp, ic); +} + +Uint64 +erts_ensure_later_interval_acqb(erts_interval_t *icp, Uint64 ic) +{ + ASSERT(!icp->smp_api); + return ensure_later_interval_acqb(icp, ic); +} + +Uint64 +erts_smp_ensure_later_interval_nob(erts_interval_t *icp, Uint64 ic) +{ + ASSERT(icp->smp_api); +#ifdef ERTS_SMP + return ensure_later_interval_nob(icp, ic); +#else + if (icp->counter.not_atomic > ic) + return icp->counter.not_atomic; + else + return ++icp->counter.not_atomic; +#endif +} + +Uint64 +erts_smp_ensure_later_interval_acqb(erts_interval_t *icp, Uint64 ic) +{ + ASSERT(icp->smp_api); +#ifdef ERTS_SMP + return ensure_later_interval_acqb(icp, ic); +#else + if (icp->counter.not_atomic > ic) + return icp->counter.not_atomic; + else + return ++icp->counter.not_atomic; +#endif +} + + #ifdef DEBUG /* * Handy functions when using a debugger - don't use in the code! @@ -3490,7 +3772,7 @@ Process *p; void ppi(Eterm pid) { - pp(erts_pid2proc_unlocked(pid)); + pp(erts_proc_lookup(pid)); } void td(Eterm x) diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c index 76a9b55179..cfa158ffb1 100644 --- a/erts/emulator/drivers/common/inet_drv.c +++ b/erts/emulator/drivers/common/inet_drv.c @@ -535,6 +535,12 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n) #endif /* __WIN32__ */ +#ifdef HAVE_SOCKLEN_T +# define SOCKLEN_T socklen_t +#else +# define SOCKLEN_T int +#endif + #include "packet_parser.h" #define get_int24(s) ((((unsigned char*) (s))[0] << 16) | \ @@ -685,7 +691,7 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n) #define INET_LOPT_EXITONCLOSE 26 /* exit port on active close or not ! */ #define INET_LOPT_TCP_HIWTRMRK 27 /* set local high watermark */ #define INET_LOPT_TCP_LOWTRMRK 28 /* set local low watermark */ -#define INET_LOPT_BIT8 29 /* set 8 bit detection */ + /* 29 unused */ #define INET_LOPT_TCP_SEND_TIMEOUT 30 /* set send timeout */ #define INET_LOPT_TCP_DELAY_SEND 31 /* Delay sends until next poll */ #define INET_LOPT_PACKET_SIZE 32 /* Max packet size */ @@ -720,12 +726,6 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n) #define INET_IFOPT_FLAGS 6 #define INET_IFOPT_HWADDR 7 -/* INET_LOPT_BIT8 options */ -#define INET_BIT8_CLEAR 0 -#define INET_BIT8_SET 1 -#define INET_BIT8_ON 2 -#define INET_BIT8_OFF 3 - /* INET_REQ_GETSTAT enumeration */ #define INET_STAT_RECV_CNT 1 #define INET_STAT_RECV_MAX 2 @@ -921,7 +921,6 @@ typedef struct { int mode; /* BINARY | LIST (affect how to interpret hsz) */ int exitf; /* exit port on close or not */ - int bit8f; /* check if data has bit number 7 set */ int deliver; /* Delivery mode, TERM or PORT */ ErlDrvTermData caller; /* recipient of sync reply */ @@ -940,8 +939,6 @@ typedef struct { int sfamily; /* address family */ enum PacketParseType htype; /* header type (TCP only?) */ unsigned int psize; /* max packet size (TCP only?) */ - int bit8; /* set if bit8f==true and data some data - seen had the 7th bit set */ inet_address remote; /* remote address for connected sockets */ inet_address peer_addr; /* fake peer address */ inet_address name_addr; /* fake local address */ @@ -3342,17 +3339,6 @@ static int packet_error_message(udp_descriptor* udesc, int err) } -/* scan buffer for bit 7 */ -static void scanbit8(inet_descriptor* desc, const char* buf, int len) -{ - int c; - - if (!desc->bit8f || desc->bit8) return; - c = 0; - while(len--) c |= *buf++; - desc->bit8 = ((c & 0x80) != 0); -} - /* ** active=TRUE: ** (NOTE! distribution MUST use active=TRUE, deliver=PORT) @@ -3370,8 +3356,6 @@ static int tcp_reply_data(tcp_descriptor* desc, char* buf, int len) packet_get_body(desc->inet.htype, &body, &bodylen); - scanbit8(INETP(desc), body, bodylen); - if (desc->inet.deliver == INET_DELIVER_PORT) { code = inet_port_data(INETP(desc), body, bodylen); } @@ -3403,8 +3387,6 @@ tcp_reply_binary_data(tcp_descriptor* desc, ErlDrvBinary* bin, int offs, int len packet_get_body(desc->inet.htype, &body, &bodylen); offs = body - bin->orig_bytes; /* body offset now */ - scanbit8(INETP(desc), body, bodylen); - if (desc->inet.deliver == INET_DELIVER_PORT) code = inet_port_binary_data(INETP(desc), bin, offs, bodylen); else if ((code=packet_parse(desc->inet.htype, buf, len, &desc->http_state, @@ -3430,8 +3412,6 @@ packet_reply_binary_data(inet_descriptor* desc, unsigned int hsz, { int code; - scanbit8(desc, bin->orig_bytes+offs, len); - if (desc->active == INET_PASSIVE) /* "inet" is actually for both UDP and SCTP, as well as TCP! */ return inet_async_binary_data(desc, hsz, bin, offs, len, extra); @@ -5349,13 +5329,8 @@ static int setopt_prio_tos_trick int res; int res_prio; int res_tos; -#ifdef HAVE_SOCKLEN_T - socklen_t -#else - int -#endif - tmp_arg_sz_prio = sizeof(tmp_ival_prio), - tmp_arg_sz_tos = sizeof(tmp_ival_tos); + SOCKLEN_T tmp_arg_sz_prio = sizeof(tmp_ival_prio); + SOCKLEN_T tmp_arg_sz_tos = sizeof(tmp_ival_tos); res_prio = sock_getopt(fd, SOL_SOCKET, SO_PRIORITY, (char *) &tmp_ival_prio, &tmp_arg_sz_prio); @@ -5499,29 +5474,6 @@ static int inet_set_opts(inet_descriptor* desc, char* ptr, int len) desc->exitf = ival; continue; - case INET_LOPT_BIT8: - DEBUGF(("inet_set_opts(%ld): s=%d, BIT8=%d\r\n", - (long)desc->port, desc->s, ival)); - switch(ival) { - case INET_BIT8_ON: - desc->bit8f = 1; - desc->bit8 = 0; - break; - case INET_BIT8_OFF: - desc->bit8f = 0; - desc->bit8 = 0; - break; - case INET_BIT8_CLEAR: - desc->bit8f = 1; - desc->bit8 = 0; - break; - case INET_BIT8_SET: - desc->bit8f = 1; - desc->bit8 = 1; - break; - } - continue; - case INET_LOPT_TCP_HIWTRMRK: if (desc->stype == SOCK_STREAM) { tcp_descriptor* tdesc = (tcp_descriptor*) desc; @@ -6404,15 +6356,6 @@ static ErlDrvSSizeT inet_fill_opts(inet_descriptor* desc, put_int32(desc->exitf, ptr); continue; - case INET_LOPT_BIT8: - *ptr++ = opt; - if (desc->bit8f) { - put_int32(desc->bit8, ptr); - } else { - put_int32(INET_BIT8_OFF, ptr); - } - continue; - case INET_LOPT_TCP_HIWTRMRK: if (desc->stype == SOCK_STREAM) { *ptr++ = opt; @@ -7471,8 +7414,6 @@ static ErlDrvData inet_start(ErlDrvPort port, int size, int protocol) desc->mode = INET_MODE_LIST; /* list mode */ desc->exitf = 1; /* exit port when close on active socket */ - desc->bit8f = 0; - desc->bit8 = 0; desc->deliver = INET_DELIVER_TERM; /* standard term format */ desc->active = INET_PASSIVE; /* start passive */ desc->oph = NULL; @@ -7780,8 +7721,8 @@ static ErlDrvSSizeT inet_ctl(inet_descriptor* desc, int cmd, char* buf, desc->state = INET_STATE_BOUND; if ((port = inet_address_port(&local)) == 0) { - len = sizeof(local); - sock_name(desc->s, (struct sockaddr*) &local, (unsigned int*)&len); + SOCKLEN_T adrlen = sizeof(local); + sock_name(desc->s, &local.sa, &adrlen); port = inet_address_port(&local); } port = sock_ntohs(port); @@ -8100,7 +8041,6 @@ static tcp_descriptor* tcp_inet_copy(tcp_descriptor* desc,SOCKET s, /* Some flags must be inherited at this point */ copy_desc->inet.mode = desc->inet.mode; copy_desc->inet.exitf = desc->inet.exitf; - copy_desc->inet.bit8f = desc->inet.bit8f; copy_desc->inet.deliver = desc->inet.deliver; copy_desc->inet.htype = desc->inet.htype; copy_desc->inet.psize = desc->inet.psize; @@ -9805,7 +9745,6 @@ static udp_descriptor* sctp_inet_copy(udp_descriptor* desc, SOCKET s, int* err) /* Some flags must be inherited at this point */ copy_desc->inet.mode = desc->inet.mode; copy_desc->inet.exitf = desc->inet.exitf; - copy_desc->inet.bit8f = desc->inet.bit8f; copy_desc->inet.deliver = desc->inet.deliver; copy_desc->inet.htype = desc->inet.htype; copy_desc->inet.psize = desc->inet.psize; diff --git a/erts/emulator/hipe/hipe_bif0.c b/erts/emulator/hipe/hipe_bif0.c index af593229c0..74868b868c 100644 --- a/erts/emulator/hipe/hipe_bif0.c +++ b/erts/emulator/hipe/hipe_bif0.c @@ -609,8 +609,8 @@ static Uint *hipe_find_emu_address(Eterm mod, Eterm name, unsigned int arity) Uint *code_base; int i, n; - modp = erts_get_module(mod); - if (modp == NULL || (code_base = modp->code) == NULL) + modp = erts_get_module(mod, erts_active_code_ix()); + if (modp == NULL || (code_base = modp->curr.code) == NULL) return NULL; n = code_base[MI_NUM_FUNCTIONS]; for (i = 0; i < n; ++i) { @@ -648,7 +648,7 @@ static void *hipe_get_emu_address(Eterm m, Eterm f, unsigned int arity, int is_r /* if not found, stub it via the export entry */ /* no lock needed around erts_export_get_or_make_stub() */ Export *export_entry = erts_export_get_or_make_stub(m, f, arity); - address = export_entry->address; + address = export_entry->addressv[erts_active_code_ix()]; } return address; } @@ -1589,7 +1589,7 @@ BIF_RETTYPE hipe_nonclosure_address(BIF_ALIST_2) f = tp[2]; if (is_not_atom(m) || is_not_atom(f)) goto badfun; - if (!erts_find_export_entry(m, f, BIF_ARG_2)) + if (!erts_active_export_entry(m, f, BIF_ARG_2)) goto badfun; } else goto badfun; diff --git a/erts/emulator/hipe/hipe_bif2.c b/erts/emulator/hipe/hipe_bif2.c index 37a1cc193b..ac0c2e2ffa 100644 --- a/erts/emulator/hipe/hipe_bif2.c +++ b/erts/emulator/hipe/hipe_bif2.c @@ -173,3 +173,10 @@ BIF_RETTYPE hipe_debug_bif_wrapper(BIF_ALIST_1) #endif /* ERTS_ENABLE_LOCK_CHECK && ERTS_SMP */ + +BIF_RETTYPE hipe_bifs_debug_native_called_2(BIF_ALIST_2) +{ + erts_printf("hipe_debug_native_called: %T(%T)\r\n", BIF_ARG_1, BIF_ARG_2); + BIF_RET(am_ok); +} + diff --git a/erts/emulator/hipe/hipe_bif2.tab b/erts/emulator/hipe/hipe_bif2.tab index aac27e8bed..ddbd31f155 100644 --- a/erts/emulator/hipe/hipe_bif2.tab +++ b/erts/emulator/hipe/hipe_bif2.tab @@ -29,3 +29,4 @@ bif hipe_bifs:show_term/1 bif hipe_bifs:in_native/0 bif hipe_bifs:modeswitch_debug_on/0 bif hipe_bifs:modeswitch_debug_off/0 +bif hipe_bifs:debug_native_called/2
\ No newline at end of file diff --git a/erts/emulator/hipe/hipe_bif_list.m4 b/erts/emulator/hipe/hipe_bif_list.m4 index 942fa0c5cb..d9aa09b79e 100644 --- a/erts/emulator/hipe/hipe_bif_list.m4 +++ b/erts/emulator/hipe/hipe_bif_list.m4 @@ -165,6 +165,7 @@ gc_bif_interface_2(nbif_put_2, put_2) gc_bif_interface_1(nbif_hipe_bifs_show_nstack_1, hipe_show_nstack_1) gc_bif_interface_1(nbif_hipe_bifs_show_pcb_1, hipe_bifs_show_pcb_1) gc_bif_interface_0(nbif_hipe_bifs_nstack_used_size_0, hipe_bifs_nstack_used_size_0) +gc_bif_interface_2(nbif_hipe_bifs_debug_native_called, hipe_bifs_debug_native_called_2) /* * Arithmetic operators called indirectly by the HiPE compiler. diff --git a/erts/emulator/hipe/hipe_debug.c b/erts/emulator/hipe/hipe_debug.c index 7ca11f8c6c..37615bf718 100644 --- a/erts/emulator/hipe/hipe_debug.c +++ b/erts/emulator/hipe/hipe_debug.c @@ -188,8 +188,6 @@ void hipe_print_pcb(Process *p) U("old_htop ", old_htop); U("old_head ", old_heap); U("min_heap_..", min_heap_size); - U("status ", status); - U("rstatus ", rstatus); U("rcount ", rcount); U("id ", id); U("prio ", prio); diff --git a/erts/emulator/hipe/hipe_mode_switch.c b/erts/emulator/hipe/hipe_mode_switch.c index 6a3ce5608f..3c782b2f56 100644 --- a/erts/emulator/hipe/hipe_mode_switch.c +++ b/erts/emulator/hipe/hipe_mode_switch.c @@ -360,7 +360,8 @@ Process *hipe_mode_switch(Process *p, unsigned cmd, Eterm reg[]) p->flags &= ~F_HIBERNATE_SCHED; goto do_schedule; } - if (p->status == P_WAITING) { + + if (!(erts_smp_atomic32_read_acqb(&p->state) & ERTS_PSFLG_ACTIVE)) { for (i = 0; i < p->arity; ++i) p->arg_reg[i] = reg[i]; goto do_schedule; @@ -451,10 +452,6 @@ Process *hipe_mode_switch(Process *p, unsigned cmd, Eterm reg[]) case HIPE_MODE_SWITCH_RES_SUSPEND: { p->i = hipe_beam_pc_resume; p->arity = 0; - erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); - if (p->status != P_SUSPENDED) - erts_add_to_runq(p); - erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); goto do_schedule; } case HIPE_MODE_SWITCH_RES_WAIT: @@ -470,7 +467,8 @@ Process *hipe_mode_switch(Process *p, unsigned cmd, Eterm reg[]) #endif p->i = hipe_beam_pc_resume; p->arity = 0; - p->status = P_WAITING; + erts_smp_atomic32_read_band_relb(&p->state, + ~ERTS_PSFLG_ACTIVE); erts_smp_proc_unlock(p, ERTS_PROC_LOCKS_MSG_RECEIVE); do_schedule: { diff --git a/erts/emulator/hipe/hipe_native_bif.h b/erts/emulator/hipe/hipe_native_bif.h index 9e3a156fbc..3f460a5a5c 100644 --- a/erts/emulator/hipe/hipe_native_bif.h +++ b/erts/emulator/hipe/hipe_native_bif.h @@ -110,6 +110,9 @@ int hipe_bs_put_big_integer(Eterm, Uint, byte*, unsigned, unsigned); AEXTERN(Eterm,nbif_check_get_msg,(Process*)); Eterm hipe_check_get_msg(Process*); +AEXTERN(BIF_RETTYPE,nbif_hipe_bifs_debug_native_called,(Process*,Eterm,Eterm)); +BIF_RETTYPE hipe_bifs_debug_native_called_2(BIF_ALIST_2); + /* * SMP-specific stuff */ diff --git a/erts/emulator/hipe/hipe_primops.h b/erts/emulator/hipe/hipe_primops.h index 38509c105b..52b4681cfe 100644 --- a/erts/emulator/hipe/hipe_primops.h +++ b/erts/emulator/hipe/hipe_primops.h @@ -80,6 +80,7 @@ PRIMOP_LIST(am_fclearerror_error, &nbif_fclearerror_error) #ifdef NO_FPE_SIGNALS PRIMOP_LIST(am_emulate_fpe, &nbif_emulate_fpe) #endif +PRIMOP_LIST(am_debug_native_called, &nbif_hipe_bifs_debug_native_called) #if defined(__sparc__) #include "hipe_sparc_primops.h" diff --git a/erts/emulator/hipe/hipe_stack.c b/erts/emulator/hipe/hipe_stack.c index da462a64e1..53c316ba52 100644 --- a/erts/emulator/hipe/hipe_stack.c +++ b/erts/emulator/hipe/hipe_stack.c @@ -130,7 +130,7 @@ struct sdesc *hipe_decode_sdesc(Eterm arg) struct sdesc *sdesc; if (is_not_tuple(arg) || - (tuple_val(arg))[0] != make_arityval(5) || + (tuple_val(arg))[0] != make_arityval(6) || term_to_Uint((tuple_val(arg))[1], &ra) == 0 || term_to_Uint((tuple_val(arg))[2], &exnra) == 0 || is_not_small((tuple_val(arg))[3]) || @@ -183,5 +183,13 @@ struct sdesc *hipe_decode_sdesc(Eterm arg) off = unsigned_val(live[i]); sdesc->livebits[off / 32] |= (1 << (off & 31)); } +#ifdef DEBUG + { + Eterm mfa_tpl = tuple_val(arg)[6]; + sdesc->dbg_M = tuple_val(mfa_tpl)[1]; + sdesc->dbg_F = tuple_val(mfa_tpl)[2]; + sdesc->dbg_A = tuple_val(mfa_tpl)[3]; + } +#endif return sdesc; } diff --git a/erts/emulator/hipe/hipe_stack.h b/erts/emulator/hipe/hipe_stack.h index 4e3076caf5..da706ae25e 100644 --- a/erts/emulator/hipe/hipe_stack.h +++ b/erts/emulator/hipe/hipe_stack.h @@ -35,6 +35,10 @@ struct sdesc { struct sdesc *next; /* hash collision chain */ } bucket; unsigned int summary; /* frame size, exn handler presence flag, arity */ +#ifdef DEBUG + Eterm dbg_M, dbg_F; + unsigned dbg_A; +#endif unsigned int livebits[1]; /* size depends on arch & data in summary field */ }; diff --git a/erts/emulator/hipe/hipe_x86_gc.h b/erts/emulator/hipe/hipe_x86_gc.h index e4607ad27d..aa4abb6f59 100644 --- a/erts/emulator/hipe/hipe_x86_gc.h +++ b/erts/emulator/hipe/hipe_x86_gc.h @@ -69,6 +69,11 @@ nstack_walk_init_sdesc(const Process *p, struct nstack_walk_state *state) nstkarity = 0; state->sdesc0[0].summary = (0 << 9) | (0 << 8) | nstkarity; state->sdesc0[0].livebits[0] = 0; +# ifdef DEBUG + state->sdesc0[0].dbg_M = 0; + state->sdesc0[0].dbg_F = am_init; + state->sdesc0[0].dbg_A = 0; +# endif /* XXX: this appears to prevent a gcc-4.1.1 bug on x86 */ __asm__ __volatile__("" : : "m"(*state) : "memory"); return &state->sdesc0[0]; diff --git a/erts/emulator/hipe/hipe_x86_glue.h b/erts/emulator/hipe/hipe_x86_glue.h index b0db93267c..63ad250d60 100644 --- a/erts/emulator/hipe/hipe_x86_glue.h +++ b/erts/emulator/hipe/hipe_x86_glue.h @@ -62,6 +62,9 @@ static __inline__ void hipe_arch_glue_init(void) .sdesc = { .bucket = { .hvalue = (unsigned long)nbif_return }, .summary = (1<<8), + #ifdef DEBUG + .dbg_F = am_return, + #endif }, }; hipe_init_sdesc_table(&nbif_return_sdesc.sdesc); diff --git a/erts/emulator/sys/win32/erl_win_sys.h b/erts/emulator/sys/win32/erl_win_sys.h index 03298a6c54..21c52ca26d 100644 --- a/erts/emulator/sys/win32/erl_win_sys.h +++ b/erts/emulator/sys/win32/erl_win_sys.h @@ -90,6 +90,11 @@ #define strncasecmp _strnicmp +#ifndef __GNUC__ +# undef ERTS_I64_LITERAL +# define ERTS_I64_LITERAL(X) X##i64 +#endif + /* * Practial Windows specific macros. */ diff --git a/erts/emulator/sys/win32/sys_time.c b/erts/emulator/sys/win32/sys_time.c index b5123dc45d..2f2dfc8197 100644 --- a/erts/emulator/sys/win32/sys_time.c +++ b/erts/emulator/sys/win32/sys_time.c @@ -26,11 +26,7 @@ #include "sys.h" #include "assert.h" -#ifdef __GNUC__ -#define LL_LITERAL(X) X##LL -#else -#define LL_LITERAL(X) X##i64 -#endif +#define LL_LITERAL(X) ERTS_I64_LITERAL(X) /******************* Routines for time measurement *********************/ diff --git a/erts/emulator/test/Makefile b/erts/emulator/test/Makefile index a3dcbc4cf3..efa3cd475f 100644 --- a/erts/emulator/test/Makefile +++ b/erts/emulator/test/Makefile @@ -47,6 +47,7 @@ MODULES= \ busy_port_SUITE \ call_trace_SUITE \ code_SUITE \ + code_parallel_load_SUITE \ crypto_SUITE \ ddll_SUITE \ decode_packet_SUITE \ diff --git a/erts/emulator/test/bif_SUITE.erl b/erts/emulator/test/bif_SUITE.erl index a21b055596..ebbd8b31c6 100644 --- a/erts/emulator/test/bif_SUITE.erl +++ b/erts/emulator/test/bif_SUITE.erl @@ -25,7 +25,9 @@ init_per_group/2,end_per_group/2, init_per_testcase/2,end_per_testcase/2, display/1, display_huge/0, - types/1, + erl_bif_types/1,guard_bifs_in_erl_bif_types/1, + shadow_comments/1, + specs/1,improper_bif_stubs/1,auto_imports/1, t_list_to_existing_atom/1,os_env/1,otp_7526/1, binary_to_atom/1,binary_to_existing_atom/1, atom_to_binary/1,min_max/1, erlang_halt/1]). @@ -33,7 +35,9 @@ suite() -> [{ct_hooks,[ts_install_cth]}]. all() -> - [types, t_list_to_existing_atom, os_env, otp_7526, + [erl_bif_types, guard_bifs_in_erl_bif_types, shadow_comments, + specs, improper_bif_stubs, auto_imports, + t_list_to_existing_atom, os_env, otp_7526, display, atom_to_binary, binary_to_atom, binary_to_existing_atom, min_max, erlang_halt]. @@ -86,33 +90,20 @@ deeep(N,Acc) -> deeep(N) -> deeep(N,[hello]). +erl_bif_types(Config) when is_list(Config) -> + ensure_erl_bif_types_compiled(), -types(Config) when is_list(Config) -> - c:l(erl_bif_types), - case erlang:function_exported(erl_bif_types, module_info, 0) of - false -> - %% Fail cleanly. - ?line ?t:fail("erl_bif_types not compiled"); - true -> - types_1() - end. - -types_1() -> - ?line List0 = erlang:system_info(snifs), + List0 = erlang:system_info(snifs), %% Ignore missing type information for hipe BIFs. - ?line List = [MFA || {M,_,_}=MFA <- List0, M =/= hipe_bifs], + List = [MFA || {M,_,_}=MFA <- List0, M =/= hipe_bifs], - case [MFA || MFA <- List, not known_types(MFA)] of - [] -> - types_2(List); - BadTypes -> - io:put_chars("No type information:\n"), - io:format("~p\n", [lists:sort(BadTypes)]), - ?line ?t:fail({length(BadTypes),bifs_without_types}) - end. + KnownTypes = [MFA || MFA <- List, known_types(MFA)], + io:format("There are ~p BIFs with type information in erl_bif_types.", + [length(KnownTypes)]), + erl_bif_types_2(KnownTypes). -types_2(List) -> +erl_bif_types_2(List) -> BadArity = [MFA || {M,F,A}=MFA <- List, begin Types = erl_bif_types:arg_types(M, F, A), @@ -120,14 +111,14 @@ types_2(List) -> end], case BadArity of [] -> - types_3(List); + erl_bif_types_3(List); [_|_] -> io:put_chars("Bifs with bad arity\n"), io:format("~p\n", [BadArity]), ?line ?t:fail({length(BadArity),bad_arity}) end. -types_3(List) -> +erl_bif_types_3(List) -> BadSmokeTest = [MFA || {M,F,A}=MFA <- List, begin try erl_bif_types:type(M, F, A) of @@ -151,9 +142,220 @@ types_3(List) -> ?line ?t:fail({length(BadSmokeTest),bad_smoke_test}) end. +guard_bifs_in_erl_bif_types(_Config) -> + ensure_erl_bif_types_compiled(), + + List0 = erlang:system_info(snifs), + List = [{F,A} || {erlang,F,A} <- List0, + erl_internal:guard_bif(F, A)], + Not = [FA || {F,A}=FA <- List, + not erl_bif_types:is_known(erlang, F, A)], + case Not of + [] -> + ok; + [_|_] -> + io:put_chars( + ["Dialyzer requires that all guard BIFs " + "have type information in erl_bif_types.\n\n" + "The following guard BIFs have no type information " + "in erl_bif_types:\n\n", + [io_lib:format(" ~p/~p\n", [F,A]) || {F,A} <- Not]]), + ?t:fail() + end. + +shadow_comments(_Config) -> + ensure_erl_bif_types_compiled(), + + List0 = erlang:system_info(snifs), + List1 = [MFA || {M,_,_}=MFA <- List0, M =/= hipe_bifs], + List = [MFA || MFA <- List1, not is_operator(MFA)], + HasTypes = [MFA || {M,F,A}=MFA <- List, + erl_bif_types:is_known(M, F, A)], + Path = get_code_path(), + BifRel = sofs:relation(HasTypes, [{m,f,a}]), + BifModules = sofs:to_external(sofs:projection(1, BifRel)), + AbstrByModule = [extract_abstract(Mod, Path) || Mod <- BifModules], + Specs0 = [extract_specs(Mod, Abstr) || + {Mod,Abstr} <- AbstrByModule], + Specs = lists:append(Specs0), + SpecFuns0 = [F || {F,_} <- Specs], + SpecFuns = sofs:relation(SpecFuns0, [{m,f,a}]), + HasTypesAndSpecs = sofs:intersection(BifRel, SpecFuns), + Commented0 = lists:append([extract_comments(Mod, Path) || + Mod <- BifModules]), + Commented = sofs:relation(Commented0, [{m,f,a}]), + {NoComments0,_,NoBifSpecs0} = + sofs:symmetric_partition(HasTypesAndSpecs, Commented), + NoComments = sofs:to_external(NoComments0), + NoBifSpecs = sofs:to_external(NoBifSpecs0), + + case NoComments of + [] -> + ok; + [_|_] -> + io:put_chars( + ["If a BIF stub has both a spec and has type information in " + "erl_bif_types, there *must*\n" + "be a comment in the source file to make that immediately " + "obvious.\n\nThe following comments are missing:\n\n", + [io_lib:format("%% Shadowed by erl_bif_types: ~p:~p/~p\n", + [M,F,A]) || {M,F,A} <- NoComments]]), + ?t:fail() + end, + + case NoBifSpecs of + [] -> + ok; + [_|_] -> + io:put_chars( + ["The following functions have \"shadowed\" comments " + "claiming that there is type information in erl_bif_types,\n" + "but actually there is no such type information.\n\n" + "Therefore, the following comments should be removed:\n\n", + [io_lib:format("%% Shadowed by erl_bif_types: ~p:~p/~p\n", + [M,F,A]) || {M,F,A} <- NoBifSpecs]]), + ?t:fail() + end. + +extract_comments(Mod, Path) -> + Beam = which(Mod, Path), + SrcDir = filename:join(filename:dirname(filename:dirname(Beam)), "src"), + Src = filename:join(SrcDir, atom_to_list(Mod) ++ ".erl"), + {ok,Bin} = file:read_file(Src), + Lines0 = binary:split(Bin, <<"\n">>, [global]), + Lines1 = [T || <<"%% Shadowed by erl_bif_types: ",T/binary>> <- Lines0], + {ok,ReMFA} = re:compile("([^:]*):([^/]*)/(\\d*)"), + Lines = [L || L <- Lines1, re:run(L, ReMFA, [{capture,[]}]) =:= match], + [begin + {match,[M,F,A]} = re:run(L, ReMFA, [{capture,all_but_first,list}]), + {list_to_atom(M),list_to_atom(F),list_to_integer(A)} + end || L <- Lines]. + +ensure_erl_bif_types_compiled() -> + c:l(erl_bif_types), + case erlang:function_exported(erl_bif_types, module_info, 0) of + false -> + %% Fail cleanly. + ?t:fail("erl_bif_types not compiled"); + true -> + ok + end. + known_types({M,F,A}) -> erl_bif_types:is_known(M, F, A). +specs(_) -> + List0 = erlang:system_info(snifs), + + %% Ignore missing type information for hipe BIFs. + List1 = [MFA || {M,_,_}=MFA <- List0, M =/= hipe_bifs], + + %% Ignore all operators. + List = [MFA || MFA <- List1, not is_operator(MFA)], + + %% Extract specs from the abstract code for all BIFs. + Path = get_code_path(), + BifRel = sofs:relation(List, [{m,f,a}]), + BifModules = sofs:to_external(sofs:projection(1, BifRel)), + AbstrByModule = [extract_abstract(Mod, Path) || Mod <- BifModules], + Specs0 = [extract_specs(Mod, Abstr) || + {Mod,Abstr} <- AbstrByModule], + Specs = lists:append(Specs0), + BifSet = sofs:set(List, [function]), + SpecRel0 = sofs:relation(Specs, [{function,spec}]), + SpecRel = sofs:restriction(SpecRel0, BifSet), + + %% Find BIFs without specs. + NoSpecs0 = sofs:difference(BifSet, sofs:domain(SpecRel)), + NoSpecs = sofs:to_external(NoSpecs0), + case NoSpecs of + [] -> + ok; + [_|_] -> + io:put_chars("The following BIFs don't have specs:\n"), + [print_mfa(MFA) || MFA <- NoSpecs], + ?t:fail() + end. + +is_operator({erlang,F,A}) -> + erl_internal:arith_op(F, A) orelse + erl_internal:bool_op(F, A) orelse + erl_internal:comp_op(F, A) orelse + erl_internal:list_op(F, A) orelse + erl_internal:send_op(F, A); +is_operator(_) -> false. + +extract_specs(M, Abstr) -> + [{make_mfa(M, Name),Spec} || {attribute,_,spec,{Name,Spec}} <- Abstr]. + +make_mfa(M, {F,A}) -> {M,F,A}; +make_mfa(M, {M,_,_}=MFA) -> MFA. + +improper_bif_stubs(_) -> + Bifs0 = erlang:system_info(snifs), + Bifs = [MFA || {M,_,_}=MFA <- Bifs0, M =/= hipe_bifs], + Path = get_code_path(), + BifRel = sofs:relation(Bifs, [{m,f,a}]), + BifModules = sofs:to_external(sofs:projection(1, BifRel)), + AbstrByModule = [extract_abstract(Mod, Path) || Mod <- BifModules], + Funcs0 = [extract_functions(Mod, Abstr) || + {Mod,Abstr} <- AbstrByModule], + Funcs = lists:append(Funcs0), + BifSet = sofs:set(Bifs, [function]), + FuncRel0 = sofs:relation(Funcs, [{function,code}]), + FuncRel = sofs:restriction(FuncRel0, BifSet), + [check_stub(MFA, Body) || {MFA,Body} <- sofs:to_external(FuncRel)], + ok. + +auto_imports(_Config) -> + Path = get_code_path(), + {erlang,Abstr} = extract_abstract(erlang, Path), + SpecFuns = [Name || {attribute,_,spec,{Name,_}} <- Abstr], + auto_imports(SpecFuns, 0). + +auto_imports([{F,A}|T], Errors) -> + case erl_internal:bif(F, A) of + false -> + io:format("~p/~p: not auto-imported, but spec claims it " + "is auto-imported", [F,A]), + auto_imports(T, Errors+1); + true -> + auto_imports(T, Errors) + end; +auto_imports([{erlang,F,A}|T], Errors) -> + case erl_internal:bif(F, A) of + false -> + auto_imports(T, Errors); + true -> + io:format("~p/~p: auto-imported, but " + "spec claims it is *not* auto-imported", [F,A]), + auto_imports(T, Errors+1) + end; +auto_imports([], 0) -> + ok; +auto_imports([], Errors) -> + ?t:fail({Errors,inconsistencies}). + +extract_functions(M, Abstr) -> + [{{M,F,A},Body} || {function,_,F,A,Body} <- Abstr]. + +check_stub({erlang,apply,3}, _) -> + ok; +check_stub({_,F,A}, B) -> + try + [{clause,_,Args,[],Body}] = B, + A = length(Args), + [{call,_,{remote,_,{atom,_,erlang},{atom,_,nif_error}},[_]}] = Body + catch + _:_ -> + io:put_chars("Invalid body for the following BIF stub:\n"), + Func = {function,0,F,A,B}, + io:put_chars(erl_pp:function(Func)), + io:nl(), + io:put_chars("The body should be: erlang:nif_error(undef)"), + ?t:fail() + end. + t_list_to_existing_atom(Config) when is_list(Config) -> ?line all = list_to_existing_atom("all"), ?line ?MODULE = list_to_existing_atom(?MODULE_STRING), @@ -483,6 +685,35 @@ erlang_halt(Config) when is_list(Config) -> id(I) -> I. +%% Get code path, including the path for the erts application. +get_code_path() -> + case code:lib_dir(erts) of + {error,bad_name} -> + Erts = filename:join([code:root_dir(),"erts","preloaded","ebin"]), + [Erts|code:get_path()]; + _ -> + code:get_path() + end. + +which(Mod, Path) -> + which_1(atom_to_list(Mod) ++ ".beam", Path). + +which_1(Base, [D|Ds]) -> + Path = filename:join(D, Base), + case filelib:is_regular(Path) of + true -> Path; + false -> which_1(Base, Ds) + end. +print_mfa({M,F,A}) -> + io:format("~p:~p/~p", [M,F,A]). + +extract_abstract(Mod, Path) -> + Beam = which(Mod, Path), + {ok,{Mod,[{abstract_code,{raw_abstract_v1,Abstr}}]}} = + beam_lib:chunks(Beam, [abstract_code]), + {Mod,Abstr}. + + hostname() -> hostname(atom_to_list(node())). diff --git a/erts/emulator/test/call_trace_SUITE.erl b/erts/emulator/test/call_trace_SUITE.erl index 9d80b01748..a642c3a63a 100644 --- a/erts/emulator/test/call_trace_SUITE.erl +++ b/erts/emulator/test/call_trace_SUITE.erl @@ -25,6 +25,7 @@ init_per_testcase/2,end_per_testcase/2, hipe/1,process_specs/1,basic/1,flags/1,errors/1,pam/1,change_pam/1, return_trace/1,exception_trace/1,on_load/1,deep_exception/1, + upgrade/1, exception_nocatch/1,bit_syntax/1]). %% Helper functions. @@ -46,6 +47,7 @@ suite() -> [{ct_hooks,[ts_install_cth]}]. all() -> Common = [errors, on_load], NotHipe = [process_specs, basic, flags, pam, change_pam, + upgrade, return_trace, exception_trace, deep_exception, exception_nocatch, bit_syntax], Hipe = [hipe], @@ -267,6 +269,118 @@ foo() -> foo0. foo(X) -> X+1. foo(X, Y) -> X+Y. + +%% Note that the semantics that this test case verifies +%% are not explicitly specified in the docs (what I could find in R15B). +%% This test case was written to verify that we do not change +%% any behaviour with the introduction of "block-free" upgrade in R16. +%% In short: Do not refer to this test case as an authority of how it must work. +upgrade(doc) -> + "Test tracing on module being upgraded"; +upgrade(Config) when is_list(Config) -> + V1 = compile_version(my_upgrade_test, 1, Config), + V2 = compile_version(my_upgrade_test, 2, Config), + start_tracer(), + upgrade_do(V1, V2, false), + upgrade_do(V1, V2, true). + +upgrade_do(V1, V2, TraceLocalVersion) -> + {module,my_upgrade_test} = erlang:load_module(my_upgrade_test, V1), + + + %% Test that trace is cleared after load_module + + trace_func({my_upgrade_test,'_','_'}, [], [global]), + case TraceLocalVersion of + true -> trace_func({my_upgrade_test,local_version,0}, [], [local]); + _ -> ok + end, + 1 = my_upgrade_test:version(), + 1 = my_upgrade_test:do_local(), + 1 = my_upgrade_test:do_real_local(), + put('F1_exp', my_upgrade_test:make_fun_exp()), + put('F1_loc', my_upgrade_test:make_fun_local()), + 1 = (get('F1_exp'))(), + 1 = (get('F1_loc'))(), + + Self = self(), + expect({trace,Self,call,{my_upgrade_test,version,[]}}), + expect({trace,Self,call,{my_upgrade_test,do_local,[]}}), + expect({trace,Self,call,{my_upgrade_test,do_real_local,[]}}), + case TraceLocalVersion of + true -> expect({trace,Self,call,{my_upgrade_test,local_version,[]}}); + _ -> ok + end, + expect({trace,Self,call,{my_upgrade_test,make_fun_exp,[]}}), + expect({trace,Self,call,{my_upgrade_test,make_fun_local,[]}}), + expect({trace,Self,call,{my_upgrade_test,version,[]}}), % F1_exp + case TraceLocalVersion of + true -> expect({trace,Self,call,{my_upgrade_test,local_version,[]}}); % F1_loc + _ -> ok + end, + + {module,my_upgrade_test} = erlang:load_module(my_upgrade_test, V2), + 2 = my_upgrade_test:version(), + put('F2_exp', my_upgrade_test:make_fun_exp()), + put('F2_loc', my_upgrade_test:make_fun_local()), + 2 = (get('F1_exp'))(), + 1 = (get('F1_loc'))(), + 2 = (get('F2_exp'))(), + 2 = (get('F2_loc'))(), + expect(), + + put('F1_exp', undefined), + put('F1_loc', undefined), + erlang:garbage_collect(), + erlang:purge_module(my_upgrade_test), + + % Test that trace is cleared after delete_module + + trace_func({my_upgrade_test,'_','_'}, [], [global]), + case TraceLocalVersion of + true -> trace_func({my_upgrade_test,local_version,0}, [], [local]); + _ -> ok + end, + 2 = my_upgrade_test:version(), + 2 = my_upgrade_test:do_local(), + 2 = my_upgrade_test:do_real_local(), + 2 = (get('F2_exp'))(), + 2 = (get('F2_loc'))(), + + expect({trace,Self,call,{my_upgrade_test,version,[]}}), + expect({trace,Self,call,{my_upgrade_test,do_local,[]}}), + expect({trace,Self,call,{my_upgrade_test,do_real_local,[]}}), + case TraceLocalVersion of + true -> expect({trace,Self,call,{my_upgrade_test,local_version,[]}}); + _ -> ok + end, + expect({trace,Self,call,{my_upgrade_test,version,[]}}), % F2_exp + case TraceLocalVersion of + true -> expect({trace,Self,call,{my_upgrade_test,local_version,[]}}); % F2_loc + _ -> ok + end, + + true = erlang:delete_module(my_upgrade_test), + {'EXIT',{undef,_}} = (catch my_upgrade_test:version()), + {'EXIT',{undef,_}} = (catch ((get('F2_exp'))())), + 2 = (get('F2_loc'))(), + expect(), + + put('F2_exp', undefined), + put('F2_loc', undefined), + erlang:garbage_collect(), + erlang:purge_module(my_upgrade_test), + ok. + +compile_version(Module, Version, Config) -> + Data = ?config(data_dir, Config), + File = filename:join(Data, atom_to_list(Module)), + {ok,Module,Bin} = compile:file(File, [{d,'VERSION',Version}, + binary,report]), + Bin. + + + %% Test flags (arity, timestamp) for call_trace/3. %% Also, test the '{tracer,Pid}' option. flags(_Config) -> @@ -1151,11 +1265,13 @@ trace_info(What, Key) -> Res. trace_func(MFA, MatchSpec) -> - get(tracer) ! {apply,self(),{erlang,trace_pattern,[MFA, MatchSpec]}}, + trace_func(MFA, MatchSpec, []). +trace_func(MFA, MatchSpec, Flags) -> + get(tracer) ! {apply,self(),{erlang,trace_pattern,[MFA, MatchSpec, Flags]}}, Res = receive {apply_result,Result} -> Result end, - ok = io:format("trace_pattern(~p, ~p) -> ~p", [MFA,MatchSpec,Res]), + ok = io:format("trace_pattern(~p, ~p, ~p) -> ~p", [MFA,MatchSpec,Flags,Res]), Res. trace_pid(Pid, On, Flags) -> diff --git a/erts/emulator/test/call_trace_SUITE_data/my_upgrade_test.erl b/erts/emulator/test/call_trace_SUITE_data/my_upgrade_test.erl new file mode 100644 index 0000000000..11b8a95209 --- /dev/null +++ b/erts/emulator/test/call_trace_SUITE_data/my_upgrade_test.erl @@ -0,0 +1,26 @@ +-module(my_upgrade_test). + +-export([version/0]). +-export([do_local/0]). +-export([do_real_local/0]). +-export([make_fun_exp/0]). +-export([make_fun_local/0]). + + +version() -> + ?VERSION. + +do_local() -> + version(). + +do_real_local() -> + local_version(). + +local_version() -> + ?VERSION. + +make_fun_exp() -> + fun() -> ?MODULE:version() end. + +make_fun_local() -> + fun() -> local_version() end. diff --git a/erts/emulator/test/code_parallel_load_SUITE.erl b/erts/emulator/test/code_parallel_load_SUITE.erl new file mode 100644 index 0000000000..aa9e4c96c6 --- /dev/null +++ b/erts/emulator/test/code_parallel_load_SUITE.erl @@ -0,0 +1,198 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2012. All Rights Reserved. +%% +%% The contents of this file are subject to the Erlang Public License, +%% Version 1.1, (the "License"); you may not use this file except in +%% compliance with the License. You should have received a copy of the +%% Erlang Public License along with this software. If not, it can be +%% retrieved online at http://www.erlang.org/. +%% +%% Software distributed under the License is distributed on an "AS IS" +%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See +%% the License for the specific language governing rights and limitations +%% under the License. +%% +%% %CopyrightEnd% +%% +%% Author: Björn-Egil Dahlberg + +-module(code_parallel_load_SUITE). +-export([ + all/0, + suite/0, + init_per_suite/1, + end_per_suite/1, + init_per_testcase/2, + end_per_testcase/2 + ]). + +-export([ + multiple_load_check_purge_repeat/1, + many_load_distributed_only_once/1 + ]). + +-define(model, code_parallel_load_SUITE_model). +-define(interval, 50). +-define(number_of_processes, 160). +-define(passes, 4). + + +-include_lib("test_server/include/test_server.hrl"). + +suite() -> [{ct_hooks,[ts_install_cth]}]. + +all() -> + [ + multiple_load_check_purge_repeat, + many_load_distributed_only_once + ]. + + +init_per_suite(Config) -> + Config. + +end_per_suite(_Config) -> + ok. + +init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) -> + Dog=?t:timetrap(?t:minutes(3)), + [{watchdog, Dog}|Config]. + +end_per_testcase(_Func, Config) -> + SConf = ?config(save_config, Config), + Pids = proplists:get_value(purge_pids, SConf), + + case check_old_code(?model) of + true -> check_and_purge_processes_code(Pids, ?model); + _ -> ok + end, + case erlang:delete_module(?model) of + true -> check_and_purge_processes_code(Pids, ?model); + _ -> ok + end, + Dog=?config(watchdog, Config), + ?t:timetrap_cancel(Dog). + + +multiple_load_check_purge_repeat(_Conf) -> + Ts = [v1,v2,v3,v4,v5,v6], + + %% generate code that receives a token, code switches to new code + %% then matches this token against a literal code token + %% should be identical + %% (smoke test for parallel code loading + Codes = [{T, generate(?model, [], [ + format("check(T) -> receive {_Pid, change, T1} -> " + " ~w:check(T1)\n" + " after 0 -> T = f(), check(T) end.\n", [?model]), + format("f() -> ~w.~n", [T]) + ])} || T <- Ts], + + Pids = setup_code_changer(Codes), + {save_config, [{purge_pids,Pids}]}. + +setup_code_changer([{Token,Code}|Cs] = Codes) -> + {module, ?model} = erlang:load_module(?model,Code), + Pids = setup_checkers(Token,?number_of_processes), + code_changer(Cs, Codes, ?interval,Pids,?passes), + Pids. + +code_changer(_, _, _, Pids, 0) -> + [unlink(Pid) || Pid <- Pids], + [exit(Pid, die) || Pid <- Pids], + io:format("done~n"), + ok; +code_changer([], Codes, T, Pids, Ps) -> + code_changer(Codes, Codes, T, Pids, Ps - 1); +code_changer([{Token,Code}|Cs], Codes, T, Pids, Ps) -> + receive after T -> + io:format("load code with token ~4w : pass ~4w~n", [Token, Ps]), + {module, ?model} = erlang:load_module(?model, Code), + % this is second time we call load_module for this module + % so it should have old code + [Pid ! {self(), change, Token} || Pid <- Pids], + % should we wait a moment or just blantantly try to check and purge repeatadly? + receive after 1 -> ok end, + ok = check_and_purge_processes_code(Pids, ?model), + code_changer(Cs, Codes, T, Pids, Ps) + end. + + + +many_load_distributed_only_once(_Conf) -> + Ts = [<<"first version">>, <<"second version">>], + + [{Token1,Code1},{Token2, Code2}] = [{T, generate(?model, [], [ + "check({<<\"second version\">> = V, Pid}) -> V = f(), Pid ! {self(), completed, V}, ok;\n" ++ + format("check(T) -> receive {Pid, change, T1, B} -> " + " Res = erlang:load_module(~w, B), Pid ! {self(), change, Res},\n" + " ~w:check({T1, Pid})\n" + " after 0 -> T = f(), check(T) end.\n", [?model, ?model]), + format("f() -> ~w.~n", [T]) + ])} || T <- Ts], + + + {module, ?model} = erlang:load_module(?model, Code1), + Pids = setup_checkers(Token1,?number_of_processes), + + receive after 1000 -> ok end, % give 'em some time to spin up + [Pid ! {self(), change, Token2, Code2} || Pid <- Pids], + Loads = [receive {Pid, change, Res} -> Res end || Pid <- Pids], + [receive {Pid, completed, Token2} -> ok end || Pid <- Pids], + + ok = ensure_only_one_load(Loads, 0), + {save_config, [{purge_pids,Pids}]}. + +ensure_only_one_load([], 1) -> ok; +ensure_only_one_load([], _) -> too_many_loads; +ensure_only_one_load([{module, ?model}|Loads], N) -> + ensure_only_one_load(Loads, N + 1); +ensure_only_one_load([{error, not_purged}|Loads], N) -> + ensure_only_one_load(Loads, N). +% no other return values are allowed from load_module + + +%% aux + +setup_checkers(_,0) -> []; +setup_checkers(T,N) -> [spawn_link(fun() -> ?model:check(T) end) | setup_checkers(T, N-1)]. + +check_and_purge_processes_code(Pids, M) -> + check_and_purge_processes_code(Pids, M, []). +check_and_purge_processes_code([], M, []) -> + erlang:purge_module(M), + ok; +check_and_purge_processes_code([], M, Pending) -> + io:format("Processes ~w are still executing old code - retrying.~n", [Pending]), + check_and_purge_processes_code(Pending, M, []); +check_and_purge_processes_code([Pid|Pids], M, Pending) -> + case erlang:check_process_code(Pid, M) of + false -> + check_and_purge_processes_code(Pids, M, Pending); + true -> + check_and_purge_processes_code(Pids, M, [Pid|Pending]) + end. + + +generate(Module, Attributes, FunStrings) -> + FunForms = function_forms(FunStrings), + Forms = [ + {attribute,1,module,Module}, + {attribute,2,export,[FA || {FA,_} <- FunForms]} + ] ++ [{attribute, 3, A, V}|| {A, V} <- Attributes] ++ + [ Function || {_, Function} <- FunForms], + {ok, Module, Bin} = compile:forms(Forms), + Bin. + + +function_forms([]) -> []; +function_forms([S|Ss]) -> + {ok, Ts,_} = erl_scan:string(S), + {ok, Form} = erl_parse:parse_form(Ts), + Fun = element(3, Form), + Arity = element(4, Form), + [{{Fun,Arity}, Form}|function_forms(Ss)]. + +format(F,Ts) -> lists:flatten(io_lib:format(F, Ts)). diff --git a/erts/emulator/test/mtx_SUITE_data/Makefile.src b/erts/emulator/test/mtx_SUITE_data/Makefile.src index b6c843269c..37eb1daa72 100644 --- a/erts/emulator/test/mtx_SUITE_data/Makefile.src +++ b/erts/emulator/test/mtx_SUITE_data/Makefile.src @@ -27,4 +27,11 @@ LIBS = @ERTS_LIBS@ all: $(NIF_LIBS) +mtx_SUITE.c: force_rebuild + touch mtx_SUITE.c + +force_rebuild: + echo "Force rebuild to compensate for emulator type dependencies" + + @SHLIB_RULES@ diff --git a/erts/etc/unix/etp-commands b/erts/etc/unix/etp-commands index 1c886620bb..aed8a6461a 100644 --- a/erts/etc/unix/etp-commands +++ b/erts/etc/unix/etp-commands @@ -1022,16 +1022,17 @@ define etp-cp-1 # Non-reentrant # set $etp_cp = (Eterm)($arg0) - set $etp_cp_low = modules - set $etp_cp_high = $etp_cp_low + num_loaded_modules - set $etp_cp_mid = mid_module + set $etp_ranges = &r[(int)the_active_code_index] + set $etp_cp_low = $etp_ranges->modules + set $etp_cp_high = $etp_cp_low + $etp_ranges->n + set $etp_cp_mid = (Range*)$etp_ranges->mid set $etp_cp_p = 0 # while $etp_cp_low < $etp_cp_high if $etp_cp < $etp_cp_mid->start set $etp_cp_high = $etp_cp_mid else - if $etp_cp > $etp_cp_mid->end + if $etp_cp > (BeamInstr*)$etp_cp_mid->end set $etp_cp_low = $etp_cp_mid + 1 else set $etp_cp_p = $etp_cp_low = $etp_cp_high = $etp_cp_mid @@ -1263,7 +1264,684 @@ document etpf-stackdump %--------------------------------------------------------------------------- end +define etp-pix2proc +# Args: Eterm +# + set $proc = (Process *) *((UWord *) &erts_proc.tab[((int) $arg0)]) + printf "(Process *) %p\n", $proc +end + +define etp-pid2proc-1 +# Args: Eterm +# + set $pix = (int) ($arg0 >> 4) + + if (erts_proc.pix_cl_mask != 0) + set $proc = (Process *) *((UWord *) &erts_proc.tab[(((($pix) & erts_proc.pix_cl_mask) << erts_proc.pix_cl_shift) + ((($pix) >> erts_proc.pix_cli_shift) & erts_proc.pix_cli_mask))]) + else + set $proc =(Process *) *((UWord *) &erts_proc.tab[((($pix) % erts_proc.max) % erts_proc.tab_cache_lines + (($pix) % erts_proc.max) / erts_proc.tab_cache_lines)]) + end +end + +define etp-pid2proc +# Args: Eterm +# + etp-pid2proc-1 $arg0 + printf "(Process *) %p\n", $proc +end + +define etp-proc-state-int +# Args: int +# + if ($arg0 & 0xfffff000) + printf "GARBAGE | " + end + if ($arg0 & 0x800) + printf "trapping-exit | " + end + if ($arg0 & 0x400) + printf "bound | " + end + if ($arg0 & 0x200) + printf "garbage-collecting | " + end + if ($arg0 & 0x100) + printf "suspended | " + end + if ($arg0 & 0x80) + printf "running | " + end + if ($arg0 & 0x40) + printf "in-run-queue | " + end + if ($arg0 & 0x20) + printf "active | " + end + if ($arg0 & 0x10) + printf "pending-exit | " + end + if ($arg0 & 0x8) + printf "exiting | " + end + if ($arg0 & 0x4) + printf "free | " + end + if ($arg0 & 0x3) == 0 + printf "prio-max\n" + else + if ($arg0 & 0x3) == 1 + printf "prio-high\n" + else + if ($arg0 & 0x3) == 2 + printf "prio-normal\n" + else + printf "prio-low\n" + end + end + end +end + +document etp-proc-state-int +%--------------------------------------------------------------------------- +% etp-proc-state-int int +% +% Print state of process state value +%--------------------------------------------------------------------------- +end + + +define etp-proc-state +# Args: Process* +# + set $state_int = *(((Uint32 *) &(((Process *) $arg0)->state))) + etp-proc-state-int $state_int +end + +document etp-proc-state +%--------------------------------------------------------------------------- +% etp-proc-state Process* +% +% Print state of process +%--------------------------------------------------------------------------- +end + +define etp-process-info +# Args: Process* +# + printf " Pid: " + etp-1 $arg0->id + printf "\n State: " + etp-proc-state $arg0 + if ($arg0->reg) + printf " Registered name: " + etp-1 $arg0->reg->name + printf "\n" + end + if ($arg0->current) + printf " Current function: " + etp-1 $arg0->current[0] + printf ":" + etp-1 $arg0->current[1] + printf "/%d\n", $arg0->current[2] + end + if ($arg0->cp) + printf " CP: " + etp-cp-1 $arg0->cp + printf "\n" + end + if ($arg0->i) + printf " I: " + etp-cp-1 $arg0->i + printf "\n" + end + printf " Heap size: %ld\n", $arg0->heap_sz + if ($arg0->old_heap) + printf " Old-heap size: %ld\n", $arg0->old_hend - $arg0->old_heap + end + printf " Mbuf size: %ld\n", $arg0->mbuf_sz + if (etp_smp_compiled) + printf " Msgq len: %ld (inner=%ld, outer=%ld)\n", ($arg0->msg.len + $arg0->msg_inq.len), $arg0->msg.len, $arg0->msg_inq.len + else + printf " Msgq len: %d\n", $arg0->msg.len + end + printf " Parent: " + etp-1 $arg0->parent + printf "\n Pointer: (Process *) %p\n", $arg0 +end + +document etp-process-info +%--------------------------------------------------------------------------- +% etp-process-info Process* +% +% Print info about process +%--------------------------------------------------------------------------- +end + +define etp-processes + if (!erts_initialized) + printf "No processes, since system isn't initialized!\n" + else + set $proc_ix = 0 + while $proc_ix < erts_proc.max + set $proc = (Process *) *((UWord *) &erts_proc.tab[$proc_ix]) + if ($proc != (Process *) 0) + printf "---\n" + printf " Pix: %d\n", $proc_ix + etp-process-info $proc + end + set $proc_ix++ + end + printf "---\n", + end +end + +document etp-processes +%--------------------------------------------------------------------------- +% etp-processes +% +% Print misc info about all processes +%--------------------------------------------------------------------------- +end + + +define etp-port-status-int +# Args: int +# + if ($arg0 & 0x1) + printf " connected" + end + if ($arg0 & 0x2) + printf " exiting" + end + if ($arg0 & 0x4) + printf " distribution" + end + if ($arg0 & 0x8) + printf " binary-io" + end + if ($arg0 & 0x10) + printf " soft-eof" + end + if ($arg0 & 0x20) + printf " port-busy" + end + if ($arg0 & 0x40) + printf " closing" + end + if ($arg0 & 0x80) + printf " send-closed" + end + if ($arg0 & 0x100) + printf " linebuf-io" + end + if ($arg0 & 0x200) + printf " immortal" + end + if ($arg0 & 0x400) + printf " free" + end + if ($arg0 & 0x800) + printf " free-scheduled" + end + if ($arg0 & 0x1000) + printf " initializing" + end + if ($arg0 & 0x2000) + printf " port-specific-lock" + end + if ($arg0 & 0x4000) + printf " invalid" + end + if (etp_debug_compiled) + if ($arg0 & 0x7fff8000) + printf " GARBAGE" + end + else + if ($arg0 & 0xffff8000) + printf " GARBAGE" + end + end + printf "\n" +end + +document etp-port-status-int +%--------------------------------------------------------------------------- +% etp-proc-state-int int +% +% Print port status +%--------------------------------------------------------------------------- +end + + +define etp-port-status +# Args: Port* +# + set $status_int = *(((Uint32 *) &(((Port *) $arg0)->status))) + etp-port-status-int $status_int +end + +document etp-port-status +%--------------------------------------------------------------------------- +% etp-proc-state-int Port * +% +% Print port status +%--------------------------------------------------------------------------- +end + +define etp-port-info +# Args: Port* +# + printf " Port: " + etp-1 $arg0->id + printf "\n Name: %s\n", $arg0->name + printf " Status:" + etp-port-status $arg0 + if ($arg0->reg) + printf " Registered name: " + etp-1 $arg0->reg->name + printf "\n" + end + printf " Connected: " + etp-1 $arg0->connected + printf "\n Pointer: (Port *) %p\n", $arg0 +end + +document etp-port-info +%--------------------------------------------------------------------------- +% etp-port-info Port* +% +% Print info about port +%--------------------------------------------------------------------------- +end + + +define etp-ports + if (!erts_initialized) + printf "No ports, since system isn't initialized!\n" + else + set $port_ix = 0 + while $port_ix < erts_max_ports + set $port = &erts_port[$port_ix] + if ($port->status & 0x400) == 0 + # I.e, not free + printf "---\n" + printf " Pix: %d\n", $port_ix + etp-port-info $port + end + set $port_ix++ + end + printf "---\n", + end +end + +document etp-ports +%--------------------------------------------------------------------------- +% etp-ports +% +% Print misc info about all ports +%--------------------------------------------------------------------------- +end + +define etp-rq-flags-int +# Args: int +# + if ($arg0 & 0x1f) + printf " Queue Mask:" + if ($arg0 & 0x1) + printf " max" + end + if ($arg0 & 0x2) + printf " high" + end + if ($arg0 & 0x4) + printf " normal" + end + if ($arg0 & 0x8) + printf " low" + end + if ($arg0 & 0x10) + printf " ports" + end + printf "\n" + end + + if ($arg0 & 0x3fe0) + printf " Emigrate Mask:" + if ($arg0 & 0x20) + printf " max" + end + if ($arg0 & 0x40) + printf " high" + end + if ($arg0 & 0x80) + printf " normal" + end + if ($arg0 & 0x100) + printf " low" + end + if ($arg0 & 0x200) + printf " ports" + end + printf "\n" + end + + if ($arg0 & 0x7fc00) + printf " Immigrate Mask:" + if ($arg0 & 0x400) + printf " max" + end + if ($arg0 & 0x800) + printf " high" + end + if ($arg0 & 0x1000) + printf " normal" + end + if ($arg0 & 0x2000) + printf " low" + end + if ($arg0 & 0x4000) + printf " ports" + end + printf "\n" + end + + if ($arg0 & 0xf8000) + printf " Evaquate Mask:" + if ($arg0 & 0x8000) + printf " max" + end + if ($arg0 & 0x10000) + printf " high" + end + if ($arg0 & 0x20000) + printf " normal" + end + if ($arg0 & 0x40000) + printf " low" + end + if ($arg0 & 0x80000) + printf " ports" + end + printf "\n" + end + + if ($arg0 & ~0xfffff) + printf " Misc Flags:" + if ($arg0 & 0x100000) + printf " out-of-work" + end + if ($arg0 & 0x200000) + printf " halftime-out-of-work" + end + if ($arg0 & 0x400000) + printf " suspended" + end + if ($arg0 & 0x800000) + printf " check-cpu-bind" + end + if ($arg0 & 0x1000000) + printf " inactive" + end + if ($arg0 & 0x2000000) + printf " non-empty" + end + if ($arg0 & 0x4000000) + printf " protected" + end + if ($arg0 & ~0x7ffffff) + printf " GARBAGE(0x%x)", ($arg0 & ~0x3ffffff) + end + printf "\n" + end +end + +document etp-rq-flags-int +%--------------------------------------------------------------------------- +% etp-rq-flags-int +% +% Print run queue flags +%--------------------------------------------------------------------------- +end + +define etp-ssi-flags +# Args: int +# + if ($arg0 & 0x1) + printf " sleeping" + end + if ($arg0 & 0x2) + printf " poll" + end + if ($arg0 & 0x4) + printf " tse" + end + if ($arg0 & 0x8) + printf " waiting" + end + if ($arg0 & 0x10) + printf " suspended" + end + printf "\n" +end + +document etp-ssi-flags +%--------------------------------------------------------------------------- +% etp-ssi-flags +% Arg int +% +% Print aux work flags +%--------------------------------------------------------------------------- +end + +define etp-aux-work-flags +# Args: int +# + if ($arg0 & 0x1) + printf " delayed-dealloc" + end + if ($arg0 & 0x2) + printf " delayed-dealloc-thr-prgr" + end + if ($arg0 & 0x4) + printf " fix-alloc-dealloc" + end + if ($arg0 & 0x8) + printf " fix-alloc-lower-lim" + end + if ($arg0 & 0x10) + printf " async-ready" + end + if ($arg0 & 0x20) + printf " async-ready-clean" + end + if ($arg0 & 0x40) + printf " misc-work-thr-prgr" + end + if ($arg0 & 0x80) + printf " misc-work" + end + if ($arg0 & 0x100) + printf " check-children" + end + if ($arg0 & 0x200) + printf " set-tmo" + end + if ($arg0 & 0x400) + printf " mseg-cached-check" + end + if ($arg0 & ~0x7ff) + printf " GARBAGE" + end + printf "\n" +end + +document etp-aux-work-flags +%--------------------------------------------------------------------------- +% etp-aux-work-flags +% Arg int +% +% Print aux work flags +%--------------------------------------------------------------------------- +end + +define etp-schedulers + if (!erts_initialized) + printf "No schedulers, since system isn't initialized!\n" + else + set $sched_ix = 0 + while $sched_ix < erts_no_schedulers + printf "--- Scheduler %d ---\n", $sched_ix+1 + printf " IX: %d\n", $sched_ix + if (erts_aligned_scheduler_data[$sched_ix].esd.cpu_id < 0) + printf " CPU Binding: unbound\n" + else + printf " CPU Binding: %d\n", erts_aligned_scheduler_data[$sched_ix].esd.cpu_id + end + printf " Aux work Flags:" + set $aux_work_flags = *((Uint32 *) &erts_aligned_scheduler_data[$sched_ix].esd.ssi->aux_work) + etp-aux-work-flags $aux_work_flags + printf " Sleep Info Flags:" + set $ssi_flags = *((Uint32 *) &erts_aligned_scheduler_data[$sched_ix].esd.ssi->flags) + etp-ssi-flags $ssi_flags + printf " Pointer: (ErtsSchedulerData *) %p\n", &erts_aligned_scheduler_data[$sched_ix].esd + printf " - Run Queue -\n" + if (etp_smp_compiled) + set $runq = erts_aligned_scheduler_data[$sched_ix].esd.run_queue + else + set $runq = &erts_aligned_run_queues[0].runq + end + printf " Length: total=%d", *((Uint32 *) &($runq->len)) + printf ", max=%d", *((Uint32 *) &($runq->procs.prio_info[0].len)) + printf ", high=%d", *((Uint32 *) &($runq->procs.prio_info[1].len)) + printf ", normal=%d", *((Uint32 *) &($runq->procs.prio_info[2].len)) + printf ", low=%d", *((Uint32 *) &($runq->procs.prio_info[3].len)) + printf ", port=%d\n", *((Uint32 *) &($runq->ports.info.len)) + if ($runq->misc.start) + printf " Misc Jobs: yes\n" + else + printf " Misc Jobs: no\n" + end + set $rq_flags = *((Uint32 *) &($runq->flags)) + etp-rq-flags-int $rq_flags + printf " Pointer: (ErtsRunQueue *) %p\n", $runq + + set $sched_ix++ + end + printf "-------------------\n", + end +end + +document etp-schedulers +%--------------------------------------------------------------------------- +% etp-schedulers +% +% Print misc info about all schedulers +%--------------------------------------------------------------------------- +end + +define etp-migration-info + set $minfo = (ErtsMigrationPaths *) *((UWord *) &erts_migration_paths) + set $rq_ix = 0 + while $rq_ix < erts_no_run_queues + if ($minfo->mpath[$rq_ix]) + printf "---\n" + printf "Run Queue Ix: %d\n", $rq_ix + etp-rq-flags-int $minfo->mpath[$rq_ix].flags + end + set $rq_ix++ + end +end +document etp-migration-info +%--------------------------------------------------------------------------- +% etp-migration-info +% +% Print migration information +%--------------------------------------------------------------------------- +end + +define etp-system-info + printf "--------------- System Information ---------------\n" + printf "OTP release: %s\n", etp_otp_release + printf "ERTS version: %s\n", etp_erts_version + printf "Compile date: %s\n", etp_compile_date + printf "Arch: %s\n", etp_arch + printf "Word size: %d-bit\n", etp_arch_bits + printf "Halfword: " + if (etp_halfword) + printf "yes\n" + else + printf "no\n" + end + printf "HiPE support: " + if (etp_hipe) + printf "yes\n" + else + printf "no\n" + end + if (etp_smp_compiled) + printf "SMP support: yes\n" + else + printf "SMP support: no\n" + end + printf "Thread support: " + if (etp_thread_compiled) + printf "yes\n" + else + printf "no\n" + end + printf "Kernel poll: " + if (etp_kernel_poll_support) + if (!erts_initialized) + printf "Supported\n" + else + if (erts_use_kernel_poll) + printf "Supported and used\n" + else + printf "Supported but not used\n" + end + end + else + printf "No support\n" + end + printf "Debug compiled: " + if (etp_debug_compiled) + printf "yes\n" + else + printf "no\n" + end + printf "Lock checking: " + if (etp_lock_check) + printf "yes\n" + else + printf "no\n" + end + printf "Lock counting: " + if (etp_lock_count) + printf "yes\n" + else + printf "no\n" + end + + if (!erts_initialized) + printf "System not initialized\n" + else + printf "Node name: " + etp-1 erts_this_node->sysname + printf "\n" + printf "Number of schedulers: %d\n", erts_no_schedulers + printf "Number of async-threads: %d\n", erts_async_max_threads + end + printf "--------------------------------------------------\n" +end + +document etp-system-info +%--------------------------------------------------------------------------- +% etp-system-info +% +% Print general information about the system +%--------------------------------------------------------------------------- +end define etp-dictdump # Args: ProcDict* @@ -1407,69 +2085,6 @@ document etpf-offheapdump %--------------------------------------------------------------------------- end -define etp-print-procs -# Args: Eterm -# -# Non-reentrant -# - etp-print-procs-1 -end - -define etp-print-procs-1 -# Args: Eterm* -# -# Non-reentrant -# - set $etp_print_procs_q = erts_max_processes / 10 - set $etp_print_procs_r = erts_max_processes % 10 - set $etp_print_procs_t = 10 - set $etp_print_procs_m = $etp_print_procs_q - if $etp_print_procs_r > 0 - set $etp_print_procs_m++ - set $etp_print_procs_r-- - end - set $etp_print_procs_i = 0 - set $etp_print_procs_found = 0 - while $etp_print_procs_i < erts_max_processes - if process_tab[$etp_print_procs_i] - printf "%d: ", $etp_print_procs_i - etp-1 process_tab[$etp_print_procs_i]->id - printf " " - etp-1 ((Eterm)(process_tab[$etp_print_procs_i]->i)) - printf " heap=%d/%d(%d)", process_tab[$etp_print_procs_i]->htop - process_tab[$etp_print_procs_i]->heap, \ - process_tab[$etp_print_procs_i]->hend - process_tab[$etp_print_procs_i]->heap, \ - process_tab[$etp_print_procs_i]->hend - process_tab[$etp_print_procs_i]->stop - printf " old=%d/%d ", process_tab[$etp_print_procs_i]->old_htop - process_tab[$etp_print_procs_i]->old_heap, \ - process_tab[$etp_print_procs_i]->old_hend - process_tab[$etp_print_procs_i]->old_heap - printf " mbuf_sz=%d ", process_tab[$etp_print_procs_i]->mbuf_sz - printf " min=%d ", process_tab[$etp_print_procs_i]->min_heap_size - printf " flags=%x ", process_tab[$etp_print_procs_i]->flags - printf " msgs=%d ", process_tab[$etp_print_procs_i]->msg.len - printf "\n" - end - set $etp_print_procs_i++ - if $etp_print_procs_i > $etp_print_procs_m - printf "%% %d%%...\n", $etp_print_procs_t - set $etp_print_procs_t += 10 - set $etp_print_procs_m += $etp_print_procs_q - if $etp_print_procs_r > 0 - set $etp_print_procs_m++ - set $etp_print_procs_r-- - end - end - end - printf "%% 100%%.\n" -end - -document etp-print-procs -%--------------------------------------------------------------------------- -% etp-print-procs Eterm -% -% Print some information about ALL processes. -%--------------------------------------------------------------------------- -end - - define etp-search-heaps # Args: Eterm # @@ -1498,20 +2113,21 @@ define etp-search-heaps-1 end set $etp_search_heaps_i = 0 set $etp_search_heaps_found = 0 - while $etp_search_heaps_i < erts_max_processes - if process_tab[$etp_search_heaps_i] - if (process_tab[$etp_search_heaps_i]->heap <= ($arg0)) && \ - (($arg0) < process_tab[$etp_search_heaps_i]->hend) + while $etp_search_heaps_i < erts_proc.max + set $proc = (Process *) *((UWord *) &erts_proc.tab[$proc_ix]) + if $proc + if ($proc->heap <= ($arg0)) && \ + (($arg0) < $proc->hend) printf "process_tab[%d]->heap+%d\n", $etp_search_heaps_i, \ - ($arg0)-process_tab[$etp_search_heaps_i]->heap + ($arg0)-$proc->heap end - if (process_tab[$etp_search_heaps_i]->old_heap <= ($arg0)) && \ - (($arg0) <= process_tab[$etp_search_heaps_i]->old_hend) + if ($proc->old_heap <= ($arg0)) && \ + (($arg0) <= $proc->old_hend) printf "process_tab[%d]->old_heap+%d\n", $etp_search_heaps_i, \ - ($arg0)-process_tab[$etp_search_heaps_i]->old_heap + ($arg0)-$proc->old_heap end set $etp_search_heaps_cnt = 0 - set $etp_search_heaps_p = process_tab[$etp_search_heaps_i]->mbuf + set $etp_search_heaps_p = $proc->mbuf while $etp_search_heaps_p && ($etp_search_heaps_cnt < $etp_max_depth) set $etp_search_heaps_cnt++ if (&($etp_search_heaps_p->mem) <= ($arg0)) && \ @@ -1523,7 +2139,7 @@ define etp-search-heaps-1 set $etp_search_heaps_p = $etp_search_heaps_p->next end if $etp_search_heaps_p - printf "process_tab[%d] %% Too many HeapFragments\n", \ + printf "Process ix=%d %% Too many HeapFragments\n", \ $etp_search_heaps_i end end @@ -2070,7 +2686,7 @@ document etp-init %--------------------------------------------------------------------------- end - etp-init help etp-init etp-show +etp-system-info diff --git a/erts/preloaded/ebin/erl_prim_loader.beam b/erts/preloaded/ebin/erl_prim_loader.beam Binary files differindex df1831f340..62d161850c 100644 --- a/erts/preloaded/ebin/erl_prim_loader.beam +++ b/erts/preloaded/ebin/erl_prim_loader.beam diff --git a/erts/preloaded/ebin/erlang.beam b/erts/preloaded/ebin/erlang.beam Binary files differindex b78747bc84..5e485948c6 100644 --- a/erts/preloaded/ebin/erlang.beam +++ b/erts/preloaded/ebin/erlang.beam diff --git a/erts/preloaded/ebin/init.beam b/erts/preloaded/ebin/init.beam Binary files differindex cc170b86b2..3bf5777b19 100644 --- a/erts/preloaded/ebin/init.beam +++ b/erts/preloaded/ebin/init.beam diff --git a/erts/preloaded/ebin/otp_ring0.beam b/erts/preloaded/ebin/otp_ring0.beam Binary files differindex 45a409738c..ab86e0eab4 100644 --- a/erts/preloaded/ebin/otp_ring0.beam +++ b/erts/preloaded/ebin/otp_ring0.beam diff --git a/erts/preloaded/ebin/prim_file.beam b/erts/preloaded/ebin/prim_file.beam Binary files differindex 6400cda2b5..538aa264d3 100644 --- a/erts/preloaded/ebin/prim_file.beam +++ b/erts/preloaded/ebin/prim_file.beam diff --git a/erts/preloaded/ebin/prim_inet.beam b/erts/preloaded/ebin/prim_inet.beam Binary files differindex b2f3ab6c5b..941ce02467 100644 --- a/erts/preloaded/ebin/prim_inet.beam +++ b/erts/preloaded/ebin/prim_inet.beam diff --git a/erts/preloaded/ebin/prim_zip.beam b/erts/preloaded/ebin/prim_zip.beam Binary files differindex 411fc8d524..bff09897d9 100644 --- a/erts/preloaded/ebin/prim_zip.beam +++ b/erts/preloaded/ebin/prim_zip.beam diff --git a/erts/preloaded/ebin/zlib.beam b/erts/preloaded/ebin/zlib.beam Binary files differindex 7a1f896d36..620b495ad4 100644 --- a/erts/preloaded/ebin/zlib.beam +++ b/erts/preloaded/ebin/zlib.beam diff --git a/erts/preloaded/src/erlang.erl b/erts/preloaded/src/erlang.erl index 1cbce5b80b..646acf5798 100644 --- a/erts/preloaded/src/erlang.erl +++ b/erts/preloaded/src/erlang.erl @@ -48,9 +48,7 @@ -deprecated([hash/2]). -% Get rid of autoimports of spawn to avoid clashes with ourselves. --compile({no_auto_import,[spawn/1]}). --compile({no_auto_import,[spawn/4]}). +%% Get rid of autoimports of spawn to avoid clashes with ourselves. -compile({no_auto_import,[spawn_link/1]}). -compile({no_auto_import,[spawn_link/4]}). -compile({no_auto_import,[spawn_opt/2]}). @@ -59,10 +57,2123 @@ -export_type([timestamp/0]). +-type ext_binary() :: binary(). -type timestamp() :: {MegaSecs :: non_neg_integer(), Secs :: non_neg_integer(), MicroSecs :: non_neg_integer()}. +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%% Native code BIF stubs and their types +%% (BIF's actually implemented in this module goes last in the file) +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%% Exports for all native code stubs +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + +-export([adler32/1, adler32/2, adler32_combine/3, append_element/2]). +-export([atom_to_binary/2, atom_to_list/1, binary_part/2, binary_part/3]). +-export([binary_to_atom/2, binary_to_existing_atom/2, binary_to_list/1]). +-export([binary_to_list/3, binary_to_term/1, binary_to_term/2]). +-export([bit_size/1, bitsize/1, bitstr_to_list/1, bitstring_to_list/1]). +-export([bump_reductions/1, byte_size/1, call_on_load_function/1]). +-export([cancel_timer/1, check_old_code/1, check_process_code/2, crc32/1]). +-export([crc32/2, crc32_combine/3, date/0, decode_packet/3]). +-export([delete_module/1, demonitor/1, demonitor/2, display/1]). +-export([display_nl/0, display_string/1, dist_exit/3, erase/0, erase/1]). +-export([error/1, error/2, exit/1, exit/2, external_size/1]). +-export([external_size/2, finish_after_on_load/2, finish_loading/1, float/1]). +-export([float_to_list/1, fun_info/2, fun_to_list/1, function_exported/3]). +-export([garbage_collect/0, garbage_collect/1]). +-export([garbage_collect_message_area/0, get/0, get/1, get_keys/1]). +-export([get_module_info/1, get_stacktrace/0, group_leader/0]). +-export([group_leader/2, halt/0, halt/1, halt/2, hash/2, hibernate/3]). +-export([integer_to_list/1, iolist_size/1, iolist_to_binary/1]). +-export([is_alive/0, is_builtin/3, is_process_alive/1, length/1, link/1]). +-export([list_to_atom/1, list_to_binary/1, list_to_bitstr/1]). +-export([list_to_bitstring/1, list_to_existing_atom/1, list_to_float/1]). +-export([list_to_integer/1, list_to_pid/1, list_to_tuple/1, loaded/0]). +-export([localtime/0, make_ref/0, match_spec_test/3, md5/1, md5_final/1]). +-export([md5_init/0, md5_update/2, module_loaded/1, monitor/2]). +-export([monitor_node/2, monitor_node/3, nif_error/1, nif_error/2 +]). +-export([node/0, node/1, now/0, phash/2, phash2/1, phash2/2]). +-export([pid_to_list/1, port_close/1, port_command/2, port_command/3]). +-export([port_connect/2, port_control/3, port_get_data/1]). +-export([port_set_data/2, port_to_list/1, ports/0]). +-export([posixtime_to_universaltime/1, pre_loaded/0, prepare_loading/2]). +-export([process_display/2]). +-export([process_flag/3, process_info/1, processes/0, purge_module/1]). +-export([put/2, raise/3, read_timer/1, ref_to_list/1, register/2]). +-export([registered/0, resume_process/1, round/1, self/0, send_after/3]). +-export([seq_trace/2, seq_trace_print/1, seq_trace_print/2, setnode/2]). +-export([setnode/3, size/1, spawn/3, spawn_link/3, split_binary/2]). +-export([start_timer/3, suspend_process/2, system_monitor/0]). +-export([system_monitor/1, system_monitor/2, system_profile/0]). +-export([system_profile/2, throw/1, time/0, trace/3, trace_delivered/1]). +-export([trace_info/2, trunc/1, tuple_size/1, universaltime/0]). +-export([universaltime_to_posixtime/1, unlink/1, unregister/1, whereis/1]). + +-export([abs/1, append/2, element/2, get_module_info/2, hd/1, + is_atom/1, is_binary/1, is_bitstring/1, is_boolean/1, + is_float/1, is_function/1, is_function/2, is_integer/1, + is_list/1, is_number/1, is_pid/1, is_port/1, is_record/2, + is_record/3, is_reference/1, is_tuple/1, load_module/2, + load_nif/2, localtime_to_universaltime/2, make_fun/3, + make_tuple/2, make_tuple/3, nodes/1, open_port/2, + port_call/2, port_call/3, port_info/1, port_info/2, process_flag/2, + process_info/2, send/2, send/3, seq_trace_info/1, + setelement/3, spawn_opt/1, + statistics/1, subtract/2, system_flag/2, + term_to_binary/1, term_to_binary/2, tl/1, trace_pattern/2, + trace_pattern/3, tuple_to_list/1, system_info/1, + universaltime_to_localtime/1]). +-export([dt_get_tag/0, dt_get_tag_data/0, dt_prepend_vm_tag_data/1, dt_append_vm_tag_data/1, + dt_put_tag/1, dt_restore_tag/1, dt_spread_tag/1]). + + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%%% Simple native code BIFs +%%% These are here for the types/specs, the real implementation is in the C code. +%%% The first chunk is originally auto-generated from +%%% $ERL_TOP/lib/hipe/cerl/erl_bif_types.erl as released in R15B. +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + + +%% types + +-type fun_info_item() :: + arity | + env | + index | + name | + module | + new_index | + new_uniq | + pid | + type | + uniq. + +-type seq_trace_info() :: + 'send' | + 'receive' | + 'print' | + 'timestamp' | + 'label' | + 'serial'. + +-type seq_trace_info_returns() :: + { seq_trace_info(), non_neg_integer() | + boolean() | + { non_neg_integer(), non_neg_integer() } } | + []. + +-type system_profile_option() :: + 'exclusive' | + 'runnable_ports' | + 'runnable_procs' | + 'scheduler'. + +-type system_monitor_option() :: + 'busy_port' | + 'busy_dist_port' | + {'long_gc', non_neg_integer()} | + {'large_heap', non_neg_integer()}. + + +-type raise_stacktrace() :: + [{module(), atom(), arity() | [term()]} | + {function(), [term()]}] | + [{module(), atom(), arity() | [term()], [{atom(),term()}]} | + {function(), [term()], [{atom(),term()}]}]. + +-type bitstring_list() :: + maybe_improper_list(byte() | bitstring() | bitstring_list(), bitstring() | []). + +-type trace_flag() :: + all | + send | + 'receive' | + procs | + call | + silent | + return_to | + running | + exiting | + garbage_collection | + timestamp | + cpu_timestamp | + arity | + set_on_spawn | + set_on_first_spawn | + set_on_link | + set_on_first_link | + {tracer, pid() | port()}. + +-type trace_info_item_result() :: + {traced, global | local | false | undefined} | + {match_spec, trace_match_spec() | false | undefined} | + {meta, pid() | port() | false | undefined | []} | + {meta_match_spec, trace_match_spec() | false | undefined} | + {call_count, non_neg_integer() | boolean() | undefined} | + {call_time, [{pid(), non_neg_integer(), + non_neg_integer(), non_neg_integer()}] | boolean() | undefined}. + +-type trace_info_flag() :: + send | + 'receive' | + set_on_spawn | + call | + return_to | + procs | + set_on_first_spawn | + set_on_link | + running | + garbage_collection | + timestamp | + arity. + +-type trace_info_return() :: + undefined | + {flags, [trace_info_flag()]} | + {tracer, pid() | port() | []} | + trace_info_item_result() | + {all, [ trace_info_item_result() ] | false | undefined}. + +%% Specs and stubs +%% adler32/1 +-spec erlang:adler32(Data) -> non_neg_integer() when + Data :: iodata(). +adler32(_Data) -> + erlang:nif_error(undefined). + +%% adler32/2 +-spec erlang:adler32(OldAdler, Data) -> non_neg_integer() when + OldAdler :: non_neg_integer(), + Data :: iodata(). +adler32(_OldAdler, _Data) -> + erlang:nif_error(undefined). + +%% adler32_combine/3 +-spec erlang:adler32_combine(FirstAdler, SecondAdler, SecondSize) -> non_neg_integer() when + FirstAdler :: non_neg_integer(), + SecondAdler :: non_neg_integer(), + SecondSize :: non_neg_integer(). +adler32_combine(_FirstAdler, _SecondAdler, _SecondSize) -> + erlang:nif_error(undefined). + +%% append_element/2 +-spec erlang:append_element(Tuple1, Term) -> Tuple2 when + Tuple1 :: tuple(), + Tuple2 :: tuple(), + Term :: term(). +append_element(_Tuple1, _Term) -> + erlang:nif_error(undefined). + +%% atom_to_binary/2 +-spec atom_to_binary(Atom, Encoding) -> binary() when + Atom :: atom(), + Encoding :: latin1 | unicode | utf8. +atom_to_binary(_Atom, _Encoding) -> + erlang:nif_error(undefined). + +%% atom_to_list/1 +-spec atom_to_list(Atom) -> string() when + Atom :: atom(). +atom_to_list(_Atom) -> + erlang:nif_error(undefined). + +%% binary_part/2 +%% Shadowed by erl_bif_types: erlang:binary_part/2 +-spec binary_part(Subject, PosLen) -> binary() when + Subject :: binary(), + PosLen :: {Start :: non_neg_integer(), Length :: integer()}. +binary_part(_Subject, _PosLen) -> + erlang:nif_error(undefined). + +%% binary_part/3 +%% Shadowed by erl_bif_types: erlang:binary_part/3 +-spec binary_part(Subject, Start, Length) -> binary() when + Subject :: binary(), + Start :: non_neg_integer(), + Length :: integer(). +binary_part(_Subject, _Start, _Length) -> + erlang:nif_error(undefined). + +%% binary_to_atom/2 +-spec binary_to_atom(Binary, Encoding) -> atom() when + Binary :: binary(), + Encoding :: latin1 | unicode | utf8. +binary_to_atom(_Binary, _Encoding) -> + erlang:nif_error(undefined). + +%% binary_to_existing_atom/2 +-spec binary_to_existing_atom(Binary, Encoding) -> atom() when + Binary :: binary(), + Encoding :: latin1 | unicode | utf8. +binary_to_existing_atom(_Binary, _Encoding) -> + erlang:nif_error(undefined). + +%% binary_to_list/1 +-spec binary_to_list(Binary) -> [byte()] when + Binary :: binary(). +binary_to_list(_Binary) -> + erlang:nif_error(undefined). + +%% binary_to_list/3 +-spec binary_to_list(Binary, Start, Stop) -> [byte()] when + Binary :: binary(), + Start :: pos_integer(), + Stop :: pos_integer(). +binary_to_list(_Binary, _Start, _Stop) -> + erlang:nif_error(undefined). + +%% binary_to_term/1 +-spec binary_to_term(Binary) -> term() when + Binary :: ext_binary(). +binary_to_term(_Binary) -> + erlang:nif_error(undefined). + +%% binary_to_term/2 +-spec binary_to_term(Binary, Opts) -> term() when + Binary :: ext_binary(), + Opts :: [safe]. +binary_to_term(_Binary, _Opts) -> + erlang:nif_error(undefined). + +%% bit_size/1 +%% Shadowed by erl_bif_types: erlang:bit_size/1 +-spec bit_size(Bitstring) -> non_neg_integer() when + Bitstring :: bitstring(). +bit_size(_Bitstring) -> + erlang:nif_error(undefined). + +%% bitsize/1 +-spec bitsize(P1) -> non_neg_integer() when + P1 :: bitstring(). +bitsize(_P1) -> + erlang:nif_error(undefined). + +%% bitstr_to_list/1 +-spec erlang:bitstr_to_list(P1) -> [byte() | bitstring()] when + P1 :: bitstring(). +bitstr_to_list(_P1) -> + erlang:nif_error(undefined). + +%% bitstring_to_list/1 +-spec bitstring_to_list(Bitstring) -> [byte() | bitstring()] when + Bitstring :: bitstring(). +bitstring_to_list(_Bitstring) -> + erlang:nif_error(undefined). + +%% bump_reductions/1 +-spec erlang:bump_reductions(Reductions) -> true when + Reductions :: pos_integer(). +bump_reductions(_Reductions) -> + erlang:nif_error(undefined). + +%% byte_size/1 +%% Shadowed by erl_bif_types: erlang:byte_size/1 +-spec byte_size(Bitstring) -> non_neg_integer() when + Bitstring :: bitstring(). +byte_size(_Bitstring) -> + erlang:nif_error(undefined). + +%% call_on_load_function/1 +-spec erlang:call_on_load_function(P1) -> term() when + P1 :: atom(). +call_on_load_function(_P1) -> + erlang:nif_error(undefined). + +%% cancel_timer/1 +-spec erlang:cancel_timer(TimerRef) -> Time | false when + TimerRef :: reference(), + Time :: non_neg_integer(). +cancel_timer(_TimerRef) -> + erlang:nif_error(undefined). + +%% check_old_code/1 +-spec check_old_code(Module) -> boolean() when + Module :: module(). +check_old_code(_Module) -> + erlang:nif_error(undefined). + +%% check_process_code/2 +-spec check_process_code(Pid, Module) -> boolean() when + Pid :: pid(), + Module :: module(). +check_process_code(_Pid, _Module) -> + erlang:nif_error(undefined). + +%% crc32/1 +-spec erlang:crc32(Data) -> non_neg_integer() when + Data :: iodata(). +crc32(_Data) -> + erlang:nif_error(undefined). + +%% crc32/2 +-spec erlang:crc32(OldCrc, Data) -> non_neg_integer() when + OldCrc :: non_neg_integer(), + Data :: iodata(). +crc32(_OldCrc, _Data) -> + erlang:nif_error(undefined). + +%% crc32_combine/3 +-spec erlang:crc32_combine(FirstCrc, SecondCrc, SecondSize) -> non_neg_integer() when + FirstCrc :: non_neg_integer(), + SecondCrc :: non_neg_integer(), + SecondSize :: non_neg_integer(). +crc32_combine(_FirstCrc, _SecondCrc, _SecondSize) -> + erlang:nif_error(undefined). + +%% date/0 +-spec date() -> Date when + Date :: calendar:date(). +date() -> + erlang:nif_error(undefined). + +%% decode_packet/3 +-spec erlang:decode_packet(Type, Bin, Options) -> + {ok, Packet, Rest} | + {more, Length} | + {error, Reason} when + Type :: 'raw' | 0 | 1 | 2 | 4 | 'asn1' | 'cdr' | 'sunrm' | 'fcgi' + | 'tpkt' | 'line' | 'http' | 'http_bin' | 'httph' | 'httph_bin', + Bin :: binary(), + Options :: [Opt], + Opt :: {packet_size, non_neg_integer()} + | {line_length, non_neg_integer()}, + Packet :: binary() | HttpPacket, + Rest :: binary(), + Length :: non_neg_integer() | undefined, + Reason :: term(), + HttpPacket :: HttpRequest + | HttpResponse + | HttpHeader + | 'http_eoh' + | HttpError, + HttpRequest :: {'http_request', HttpMethod, HttpUri, HttpVersion}, + HttpResponse :: {'http_response', HttpVersion, integer(), HttpString}, + HttpHeader :: {'http_header', + integer(), + HttpField, + Reserved :: term(), + Value :: HttpString}, + HttpError :: {'http_error', HttpString}, + HttpMethod :: 'OPTIONS' | 'GET' | 'HEAD' | 'POST' | 'PUT' | 'DELETE' + | 'TRACE' | HttpString, + HttpUri :: '*' + | { 'absoluteURI', + 'http' | 'https', + Host :: HttpString, + Port :: inet:port_number() | 'undefined', + Path :: HttpString} + | {'scheme', Scheme :: HttpString, HttpString} + | {'abs_path', HttpString} + | HttpString, + HttpVersion :: {Major :: non_neg_integer(), Minor :: non_neg_integer()}, + HttpField :: 'Cache-Control' + | 'Connection' + | 'Date' + | 'Pragma' + | 'Transfer-Encoding' + | 'Upgrade' + | 'Via' + | 'Accept' + | 'Accept-Charset' + | 'Accept-Encoding' + | 'Accept-Language' + | 'Authorization' + | 'From' + | 'Host' + | 'If-Modified-Since' + | 'If-Match' + | 'If-None-Match' + | 'If-Range' + | 'If-Unmodified-Since' + | 'Max-Forwards' + | 'Proxy-Authorization' + | 'Range' + | 'Referer' + | 'User-Agent' + | 'Age' + | 'Location' + | 'Proxy-Authenticate' + | 'Public' + | 'Retry-After' + | 'Server' + | 'Vary' + | 'Warning' + |'Www-Authenticate' + | 'Allow' + | 'Content-Base' + | 'Content-Encoding' + | 'Content-Language' + | 'Content-Length' + | 'Content-Location' + | 'Content-Md5' + | 'Content-Range' + | 'Content-Type' + | 'Etag' + | 'Expires' + | 'Last-Modified' + | 'Accept-Ranges' + | 'Set-Cookie' + | 'Set-Cookie2' + | 'X-Forwarded-For' + | 'Cookie' + | 'Keep-Alive' + | 'Proxy-Connection' + | HttpString, + HttpString :: string() | binary(). +decode_packet(_Type, _Bin, _Options) -> + erlang:nif_error(undefined). + +%% delete_module/1 +-spec delete_module(Module) -> true | undefined when + Module :: module(). +delete_module(_Module) -> + erlang:nif_error(undefined). + +%% demonitor/1 +-spec demonitor(MonitorRef) -> true when + MonitorRef :: reference(). +demonitor(_MonitorRef) -> + erlang:nif_error(undefined). + +%% demonitor/2 +-spec demonitor(MonitorRef, OptionList) -> boolean() when + MonitorRef :: reference(), + OptionList :: [Option], + Option :: flush | info. +demonitor(_MonitorRef, _OptionList) -> + erlang:nif_error(undefined). + +%% display/1 +-spec erlang:display(Term) -> true when + Term :: term(). +display(_Term) -> + erlang:nif_error(undefined). + +%% display_nl/0 +-spec erlang:display_nl() -> true. +display_nl() -> + erlang:nif_error(undefined). + +%% display_string/1 +-spec erlang:display_string(P1) -> true when + P1 :: string(). +display_string(_P1) -> + erlang:nif_error(undefined). + +%% dist_exit/3 +-spec erlang:dist_exit(P1, P2, P3) -> true when + P1 :: pid(), + P2 :: kill | noconnection | normal, + P3 :: pid() | port(). +dist_exit(_P1, _P2, _P3) -> + erlang:nif_error(undefined). + +%% dt_append_vm_tag_data/1 +-spec erlang:dt_append_vm_tag_data(IoData) -> IoDataRet when + IoData :: iodata(), + IoDataRet :: iodata(). +dt_append_vm_tag_data(_IoData) -> + erlang:nif_error(undefined). + +%% dt_get_tag/0 +-spec erlang:dt_get_tag() -> binary() | undefined. +dt_get_tag() -> + erlang:nif_error(undefined). + +%% dt_get_tag_data/0 +-spec erlang:dt_get_tag_data() -> binary() | undefined. +dt_get_tag_data() -> + erlang:nif_error(undefined). + +%% dt_prepend_vm_tag_data/1 +-spec erlang:dt_prepend_vm_tag_data(IoData) -> IoDataRet when + IoData :: iodata(), + IoDataRet :: iodata(). +dt_prepend_vm_tag_data(_IoData) -> + erlang:nif_error(undefined). + +%% dt_put_tag/1 +-spec erlang:dt_put_tag(IoData) -> binary() | undefined when + IoData :: iodata(). +dt_put_tag(_IoData) -> + erlang:nif_error(undefined). + +%% dt_restore_tag/1 +-spec erlang:dt_restore_tag(TagData) -> true when + TagData :: term(). +dt_restore_tag(_TagData) -> + erlang:nif_error(undefined). + +%% dt_spread_tag/1 +-spec erlang:dt_spread_tag(boolean()) -> TagData when + TagData :: term(). +dt_spread_tag(_Bool) -> + erlang:nif_error(undefined). + +%% erase/0 +-spec erase() -> [{Key, Val}] when + Key :: term(), + Val :: term(). +erase() -> + erlang:nif_error(undefined). + +%% erase/1 +-spec erase(Key) -> Val | undefined when + Key :: term(), + Val :: term(). +erase(_Key) -> + erlang:nif_error(undefined). + +%% error/1 +%% Shadowed by erl_bif_types: erlang:error/1 +-spec error(Reason) -> no_return() when + Reason :: term(). +error(_Reason) -> + erlang:nif_error(undefined). + +%% error/2 +%% Shadowed by erl_bif_types: erlang:error/2 +-spec error(Reason, Args) -> no_return() when + Reason :: term(), + Args :: [term()]. +error(_Reason, _Args) -> + erlang:nif_error(undefined). + +%% exit/1 +%% Shadowed by erl_bif_types: erlang:exit/1 +-spec exit(Reason) -> no_return() when + Reason :: term(). +exit(_Reason) -> + erlang:nif_error(undefined). + +%% exit/2 +-spec exit(Pid, Reason) -> true when + Pid :: pid() | port(), + Reason :: term(). +exit(_Pid, _Reason) -> + erlang:nif_error(undefined). + +%% external_size/1 +-spec erlang:external_size(Term) -> non_neg_integer() when + Term :: term(). +external_size(_Term) -> + erlang:nif_error(undefined). + +%% external_size/2 +-spec erlang:external_size(Term, Options) -> non_neg_integer() when + Term :: term(), + Options :: [{minor_version, Version :: non_neg_integer()}]. +external_size(_Term, _Options) -> + erlang:nif_error(undefined). + +%% finish_loading/2 +-spec erlang:finish_loading(PreparedCodeBinaries) -> ok | Error when + PreparedCodeBinaries :: [PreparedCodeBinary], + PreparedCodeBinary :: binary(), + ModuleList :: [module()], + Error :: {not_purged,ModuleList} | {on_load,ModuleList}. +finish_loading(_List) -> + erlang:nif_error(undefined). + +%% finish_after_on_load/2 +-spec erlang:finish_after_on_load(P1, P2) -> true when + P1 :: atom(), + P2 :: boolean(). +finish_after_on_load(_P1, _P2) -> + erlang:nif_error(undefined). + +%% float/1 +%% Shadowed by erl_bif_types: erlang:float/1 +-spec float(Number) -> float() when + Number :: number(). +float(_Number) -> + erlang:nif_error(undefined). + +%% float_to_list/1 +-spec float_to_list(Float) -> string() when + Float :: float(). +float_to_list(_Float) -> + erlang:nif_error(undefined). + +%% fun_info/2 +-spec erlang:fun_info(Fun, Item) -> {Item, Info} when + Fun :: function(), + Item :: fun_info_item(), + Info :: term(). +fun_info(_Fun, _Item) -> + erlang:nif_error(undefined). + +%% fun_to_list/1 +-spec erlang:fun_to_list(Fun) -> string() when + Fun :: function(). +fun_to_list(_Fun) -> + erlang:nif_error(undefined). + +%% function_exported/3 +-spec erlang:function_exported(Module, Function, Arity) -> boolean() when + Module :: module(), + Function :: atom(), + Arity :: arity(). +function_exported(_Module, _Function, _Arity) -> + erlang:nif_error(undefined). + +%% garbage_collect/0 +-spec garbage_collect() -> true. +garbage_collect() -> + erlang:nif_error(undefined). + +%% garbage_collect/1 +-spec garbage_collect(Pid) -> boolean() when + Pid :: pid(). +garbage_collect(_Pid) -> + erlang:nif_error(undefined). + +%% garbage_collect_message_area/0 +-spec erlang:garbage_collect_message_area() -> boolean(). +garbage_collect_message_area() -> + erlang:nif_error(undefined). + +%% get/0 +-spec get() -> [{Key, Val}] when + Key :: term(), + Val :: term(). +get() -> + erlang:nif_error(undefined). + +%% get/1 +-spec get(Key) -> Val | undefined when + Key :: term(), + Val :: term(). +get(_Key) -> + erlang:nif_error(undefined). + +%% get_keys/1 +-spec get_keys(Val) -> [Key] when + Val :: term(), + Key :: term(). +get_keys(_Val) -> + erlang:nif_error(undefined). + +%% get_module_info/1 +-spec erlang:get_module_info(P1) -> [{atom(), [{atom(), term()}]}] when + P1 :: atom(). +get_module_info(_P1) -> + erlang:nif_error(undefined). + +%% get_stacktrace/0 +-spec erlang:get_stacktrace() -> [stack_item()]. +get_stacktrace() -> + erlang:nif_error(undefined). + +%% group_leader/0 +-spec group_leader() -> pid(). +group_leader() -> + erlang:nif_error(undefined). + +%% group_leader/2 +-spec group_leader(GroupLeader, Pid) -> true when + GroupLeader :: pid(), + Pid :: pid(). +group_leader(_GroupLeader, _Pid) -> + erlang:nif_error(undefined). + +%% halt/0 +%% Shadowed by erl_bif_types: erlang:halt/0 +-spec halt() -> no_return(). +halt() -> + erlang:nif_error(undefined). + +%% halt/1 +%% Shadowed by erl_bif_types: erlang:halt/1 +-spec halt(Status) -> no_return() when + Status :: non_neg_integer() | 'abort' | string(). +halt(_Status) -> + erlang:nif_error(undefined). + +%% halt/2 +%% Shadowed by erl_bif_types: erlang:halt/2 +-spec halt(Status, Options) -> no_return() when + Status :: non_neg_integer() | 'abort' | string(), + Options :: [Option], + Option :: {flush, boolean()}. +halt(_Status, _Options) -> + erlang:nif_error(undefined). + +%% hash/2 +-spec erlang:hash(Term, Range) -> pos_integer() when + Term :: term(), + Range :: pos_integer(). +hash(_Term, _Range) -> + erlang:nif_error(undefined). + +%% hibernate/3 +-spec erlang:hibernate(Module, Function, Args) -> no_return() when + Module :: module(), + Function :: atom(), + Args :: [term()]. +hibernate(_Module, _Function, _Args) -> + erlang:nif_error(undefined). + +%% integer_to_list/1 +-spec integer_to_list(Integer) -> string() when + Integer :: integer(). +integer_to_list(_Integer) -> + erlang:nif_error(undefined). + +%% iolist_size/1 +-spec iolist_size(Item) -> non_neg_integer() when + Item :: iolist() | binary(). +iolist_size(_Item) -> + erlang:nif_error(undefined). + +%% iolist_to_binary/1 +-spec iolist_to_binary(IoListOrBinary) -> binary() when + IoListOrBinary :: iolist() | binary(). +iolist_to_binary(_IoListOrBinary) -> + erlang:nif_error(undefined). + +%% is_alive/0 +-spec is_alive() -> boolean(). +is_alive() -> + erlang:nif_error(undefined). + +%% is_builtin/3 +-spec erlang:is_builtin(Module, Function, Arity) -> boolean() when + Module :: module(), + Function :: atom(), + Arity :: arity(). +is_builtin(_Module, _Function, _Arity) -> + erlang:nif_error(undefined). + +%% is_process_alive/1 +-spec is_process_alive(Pid) -> boolean() when + Pid :: pid(). +is_process_alive(_Pid) -> + erlang:nif_error(undefined). + +%% length/1 +%% Shadowed by erl_bif_types: erlang:length/1 +-spec length(List) -> non_neg_integer() when + List :: [term()]. +length(_List) -> + erlang:nif_error(undefined). + +%% link/1 +-spec link(PidOrPort) -> true when + PidOrPort :: pid() | port(). +link(_PidOrPort) -> + erlang:nif_error(undefined). + +%% list_to_atom/1 +-spec list_to_atom(String) -> atom() when + String :: string(). +list_to_atom(_String) -> + erlang:nif_error(undefined). + +%% list_to_binary/1 +-spec list_to_binary(IoList) -> binary() when + IoList :: iolist(). +list_to_binary(_IoList) -> + erlang:nif_error(undefined). + +%% list_to_bitstr/1 +-spec erlang:list_to_bitstr(P1) -> bitstring() when + P1 :: bitstring_list(). +list_to_bitstr(_P1) -> + erlang:nif_error(undefined). + +%% list_to_bitstring/1 +-spec list_to_bitstring(BitstringList) -> bitstring() when + BitstringList :: bitstring_list(). +list_to_bitstring(_BitstringList) -> + erlang:nif_error(undefined). + +%% list_to_existing_atom/1 +-spec list_to_existing_atom(String) -> atom() when + String :: string(). +list_to_existing_atom(_String) -> + erlang:nif_error(undefined). + +%% list_to_float/1 +-spec list_to_float(String) -> float() when + String :: string(). +list_to_float(_String) -> + erlang:nif_error(undefined). + +%% list_to_integer/1 +-spec list_to_integer(String) -> integer() when + String :: string(). +list_to_integer(_String) -> + erlang:nif_error(undefined). + +%% list_to_pid/1 +-spec list_to_pid(String) -> pid() when + String :: string(). +list_to_pid(_String) -> + erlang:nif_error(undefined). + +%% list_to_tuple/1 +-spec list_to_tuple(List) -> tuple() when + List :: [term()]. +list_to_tuple(_List) -> + erlang:nif_error(undefined). + +%% loaded/0 +-spec erlang:loaded() -> [Module] when + Module :: module(). +loaded() -> + erlang:nif_error(undefined). + +%% localtime/0 +-spec erlang:localtime() -> DateTime when + DateTime :: calendar:datetime(). +localtime() -> + erlang:nif_error(undefined). + +%% make_ref/0 +-spec make_ref() -> reference(). +make_ref() -> + erlang:nif_error(undefined). + +%% match_spec_test/3 +-spec erlang:match_spec_test(P1, P2, P3) -> TestResult when + P1 :: [term()] | tuple(), + P2 :: term(), + P3 :: table | trace, + TestResult :: {ok, term(), [return_trace], [ {error | warning, string()} ]} | {error, [ {error | warning, string()} ]}. +match_spec_test(_P1, _P2, _P3) -> + erlang:nif_error(undefined). + +%% md5/1 +-spec erlang:md5(Data) -> Digest when + Data :: iodata(), + Digest :: binary(). +md5(_Data) -> + erlang:nif_error(undefined). + +%% md5_final/1 +-spec erlang:md5_final(Context) -> Digest when + Context :: binary(), + Digest :: binary(). +md5_final(_Context) -> + erlang:nif_error(undefined). + +%% md5_init/0 +-spec erlang:md5_init() -> Context when + Context :: binary(). +md5_init() -> + erlang:nif_error(undefined). + +%% md5_update/2 +-spec erlang:md5_update(Context, Data) -> NewContext when + Context :: binary(), + Data :: iodata(), + NewContext :: binary(). +md5_update(_Context, _Data) -> + erlang:nif_error(undefined). + +%% module_loaded/1 +-spec module_loaded(Module) -> boolean() when + Module :: module(). +module_loaded(_Module) -> + erlang:nif_error(undefined). + +%% monitor/2 +-spec monitor(Type, Item) -> MonitorRef when + Type :: process, + Item :: pid() | Module | {Module, Node}, + Module :: module(), + Node :: node(), + MonitorRef :: reference(). +monitor(_Type, _Item) -> + erlang:nif_error(undefined). + +%% monitor_node/2 +-spec monitor_node(Node, Flag) -> true when + Node :: node(), + Flag :: boolean(). +monitor_node(_Node, _Flag) -> + erlang:nif_error(undefined). + +%% monitor_node/3 +-spec erlang:monitor_node(Node, Flag, Options) -> true when + Node :: node(), + Flag :: boolean(), + Options :: [Option], + Option :: allow_passive_connect. +monitor_node(_Node, _Flag, _Options) -> + erlang:nif_error(undefined). + +%% nif_error/1 +%% Shadowed by erl_bif_types: erlang:nif_error/1 +-spec erlang:nif_error(Reason) -> no_return() when + Reason :: term(). +nif_error(_Reason) -> + erlang:nif_error(undefined). + +%% nif_error/2 +%% Shadowed by erl_bif_types: erlang:nif_error/2 +-spec erlang:nif_error(Reason, Args) -> no_return() when + Reason :: term(), + Args :: [term()]. +nif_error(_Reason, _Args) -> + erlang:nif_error(undefined). + +%% node/0 +%% Shadowed by erl_bif_types: erlang:node/0 +-spec node() -> Node when + Node :: node(). +node() -> + erlang:nif_error(undefined). + +%% node/1 +%% Shadowed by erl_bif_types: erlang:node/1 +-spec node(Arg) -> Node when + Arg :: pid() | port() | reference(), + Node :: node(). +node(_Arg) -> + erlang:nif_error(undefined). + +%% now/0 +-spec now() -> Timestamp when + Timestamp :: timestamp(). +now() -> + erlang:nif_error(undefined). + +%% phash/2 +-spec erlang:phash(Term, Range) -> Hash when + Term :: term(), + Range :: pos_integer(), + Hash :: pos_integer(). +phash(_Term, _Range) -> + erlang:nif_error(undefined). + +%% phash2/1 +-spec erlang:phash2(Term) -> Hash when + Term :: term(), + Hash :: non_neg_integer(). +phash2(_Term) -> + erlang:nif_error(undefined). + +%% phash2/2 +-spec erlang:phash2(Term, Range) -> Hash when + Term :: term(), + Range :: pos_integer(), + Hash :: non_neg_integer(). +phash2(_Term, _Range) -> + erlang:nif_error(undefined). + +%% pid_to_list/1 +-spec pid_to_list(Pid) -> string() when + Pid :: pid(). +pid_to_list(_Pid) -> + erlang:nif_error(undefined). + +%% port_close/1 +-spec port_close(Port) -> true when + Port :: port() | atom(). +port_close(_Port) -> + erlang:nif_error(undefined). + +%% port_command/2 +-spec port_command(Port, Data) -> true when + Port :: port() | atom(), + Data :: iodata(). +port_command(_Port, _Data) -> + erlang:nif_error(undefined). + +%% port_command/3 +-spec port_command(Port, Data, OptionList) -> boolean() when + Port :: port() | atom(), + Data :: iodata(), + OptionList :: [Option], + Option :: force | nosuspend. +port_command(_Port, _Data, _OptionList) -> + erlang:nif_error(undefined). + +%% port_connect/2 +-spec port_connect(Port, Pid) -> true when + Port :: port() | atom(), + Pid :: pid(). +port_connect(_Port, _Pid) -> + erlang:nif_error(undefined). + +%% port_control/3 +-spec port_control(Port, Operation, Data) -> Res when + Port :: port() | atom(), + Operation :: integer(), + Data :: iodata(), + Res :: string() | binary(). +port_control(_Port, _Operation, _Data) -> + erlang:nif_error(undefined). + +%% port_get_data/1 +-spec erlang:port_get_data(P1) -> term() when + P1 :: port() | atom(). +port_get_data(_P1) -> + erlang:nif_error(undefined). + +%% port_set_data/2 +-spec erlang:port_set_data(P1, P2) -> true when + P1 :: port() | atom(), + P2 :: term(). +port_set_data(_P1, _P2) -> + erlang:nif_error(undefined). + +%% port_to_list/1 +-spec erlang:port_to_list(Port) -> string() when + Port :: port(). +port_to_list(_Port) -> + erlang:nif_error(undefined). + +%% ports/0 +-spec erlang:ports() -> [port()]. +ports() -> + erlang:nif_error(undefined). + +%% posixtime_to_universaltime/1 +-spec erlang:posixtime_to_universaltime(P1) -> {calendar:date(), calendar:time()} when + P1 :: integer(). +posixtime_to_universaltime(_P1) -> + erlang:nif_error(undefined). + +%% prepare_loading/2 +-spec erlang:prepare_loading(Module, Code) -> PreparedCode | {error, Reason} when + Module :: module(), + Code :: binary(), + PreparedCode :: binary(), + Reason :: bad_file. +prepare_loading(_Module, _Code) -> + erlang:nif_error(undefined). + +%% pre_loaded/0 +-spec pre_loaded() -> [module()]. +pre_loaded() -> + erlang:nif_error(undefined). + +%% process_display/2 +-spec erlang:process_display(Pid, Type) -> true when + Pid :: pid(), + Type :: backtrace. +process_display(_Pid, _Type) -> + erlang:nif_error(undefined). + +%% process_flag/3 +-spec process_flag(Pid, Flag, Value) -> OldValue when + Pid :: pid(), + Flag :: save_calls, + Value :: non_neg_integer(), + OldValue :: non_neg_integer(). +process_flag(_Pid, _Flag, _Value) -> + erlang:nif_error(undefined). + +%% process_info/1 +-spec process_info(Pid) -> Info when + Pid :: pid(), + Info :: [InfoTuple] | undefined, + InfoTuple :: process_info_result_item(). +process_info(_Pid) -> + erlang:nif_error(undefined). + +%% processes/0 +-spec processes() -> [pid()]. +processes() -> + erlang:nif_error(undefined). + +%% purge_module/1 +-spec purge_module(Module) -> true when + Module :: atom(). +purge_module(_Module) -> + erlang:nif_error(undefined). + +%% put/2 +-spec put(Key, Val) -> term() when + Key :: term(), + Val :: term(). +put(_Key, _Val) -> + erlang:nif_error(undefined). + +%% raise/3 +-spec erlang:raise(Class, Reason, Stacktrace) -> no_return() when + Class :: error | exit | throw, + Reason :: term(), + Stacktrace :: raise_stacktrace(). +raise(_Class, _Reason, _Stacktrace) -> + erlang:nif_error(undefined). + +%% read_timer/1 +-spec erlang:read_timer(TimerRef) -> non_neg_integer() | false when + TimerRef :: reference(). +read_timer(_TimerRef) -> + erlang:nif_error(undefined). + +%% ref_to_list/1 +-spec erlang:ref_to_list(Ref) -> string() when + Ref :: reference(). +ref_to_list(_Ref) -> + erlang:nif_error(undefined). + +%% register/2 +-spec register(RegName, PidOrPort) -> true when + RegName :: atom(), + PidOrPort :: port() | pid(). +register(_RegName, _PidOrPort) -> + erlang:nif_error(undefined). + +%% registered/0 +-spec registered() -> [RegName] when + RegName :: atom(). +registered() -> + erlang:nif_error(undefined). + +%% resume_process/1 +-spec erlang:resume_process(Suspendee) -> true when + Suspendee :: pid(). +resume_process(_Suspendee) -> + erlang:nif_error(undefined). + +%% round/1 +%% Shadowed by erl_bif_types: erlang:round/1 +-spec round(Number) -> integer() when + Number :: number(). +round(_Number) -> + erlang:nif_error(undefined). + +%% self/0 +%% Shadowed by erl_bif_types: erlang:self/0 +-spec self() -> pid(). +self() -> + erlang:nif_error(undefined). + +%% send_after/3 +-spec erlang:send_after(Time, Dest, Msg) -> TimerRef when + Time :: non_neg_integer(), + Dest :: pid() | atom(), + Msg :: term(), + TimerRef :: reference(). +send_after(_Time, _Dest, _Msg) -> + erlang:nif_error(undefined). + +%% seq_trace/2 +-spec erlang:seq_trace(P1, P2) -> seq_trace_info_returns() | {term(), term(), term(), term(), term()} when + P1 :: atom(), + P2 :: boolean() | {integer(), integer()} | integer() | []. +seq_trace(_P1, _P2) -> + erlang:nif_error(undefined). + +%% seq_trace_print/1 +-spec erlang:seq_trace_print(P1) -> boolean() when + P1 :: term(). +seq_trace_print(_P1) -> + erlang:nif_error(undefined). + +%% seq_trace_print/2 +-spec erlang:seq_trace_print(P1, P2) -> boolean() when + P1 :: atom() | integer(), + P2 :: term(). +seq_trace_print(_P1, _P2) -> + erlang:nif_error(undefined). + +%% setnode/2 +-spec erlang:setnode(P1, P2) -> true when + P1 :: atom(), + P2 :: integer(). +setnode(_P1, _P2) -> + erlang:nif_error(undefined). + +%% setnode/3 +-spec erlang:setnode(P1, P2, P3) -> true when + P1 :: atom(), + P2 :: port(), + P3 :: {term(), term(), term(), term()}. +setnode(_P1, _P2, _P3) -> + erlang:nif_error(undefined). + +%% size/1 +%% Shadowed by erl_bif_types: erlang:size/1 +-spec size(Item) -> non_neg_integer() when + Item :: tuple() | binary(). +size(_Item) -> + erlang:nif_error(undefined). + +%% spawn/3 +-spec spawn(Module, Function, Args) -> pid() when + Module :: module(), + Function :: atom(), + Args :: [term()]. +spawn(_Module, _Function, _Args) -> + erlang:nif_error(undefined). + +%% spawn_link/3 +-spec spawn_link(Module, Function, Args) -> pid() when + Module :: module(), + Function :: atom(), + Args :: [term()]. +spawn_link(_Module, _Function, _Args) -> + erlang:nif_error(undefined). + +%% split_binary/2 +-spec split_binary(Bin, Pos) -> {binary(), binary()} when + Bin :: binary(), + Pos :: non_neg_integer(). +split_binary(_Bin, _Pos) -> + erlang:nif_error(undefined). + +%% start_timer/3 +-spec erlang:start_timer(Time, Dest, Msg) -> TimerRef when + Time :: non_neg_integer(), + Dest :: pid() | atom(), + Msg :: term(), + TimerRef :: reference(). +start_timer(_Time, _Dest, _Msg) -> + erlang:nif_error(undefined). + +%% suspend_process/2 +-spec erlang:suspend_process(Suspendee, OptList) -> boolean() when + Suspendee :: pid(), + OptList :: [Opt], + Opt :: unless_suspending | asynchronous. +suspend_process(_Suspendee, _OptList) -> + erlang:nif_error(undefined). + +%% system_monitor/0 +-spec erlang:system_monitor() -> MonSettings when + MonSettings :: undefined | { MonitorPid, Options }, + MonitorPid :: pid(), + Options :: [ system_monitor_option() ]. +system_monitor() -> + erlang:nif_error(undefined). + +%% system_monitor/1 +-spec erlang:system_monitor(Arg) -> MonSettings when + Arg :: undefined | { MonitorPid, Options }, + MonSettings :: undefined | { MonitorPid, Options }, + MonitorPid :: pid(), + Options :: [ system_monitor_option() ]. +system_monitor(_Arg) -> + erlang:nif_error(undefined). + +%% system_monitor/2 +-spec erlang:system_monitor(MonitorPid, Options) -> MonSettings when + MonitorPid :: pid(), + Options :: [ system_monitor_option() ], + MonSettings :: undefined | { OldMonitorPid, OldOptions }, + OldMonitorPid :: pid(), + OldOptions :: [ system_monitor_option() ]. +system_monitor(_MonitorPid, _Options) -> + erlang:nif_error(undefined). + +%% system_profile/0 +-spec erlang:system_profile() -> ProfilerSettings when + ProfilerSettings :: undefined | { ProfilerPid, Options}, + ProfilerPid :: pid() | port(), + Options :: [ system_profile_option() ]. +system_profile() -> + erlang:nif_error(undefined). + +%% system_profile/2 +-spec erlang:system_profile(ProfilerPid, Options) -> ProfilerSettings when + ProfilerPid :: pid() | port() | undefined, + Options :: [ system_profile_option() ], + ProfilerSettings :: undefined | { pid() | port(), [ system_profile_option() ]}. +system_profile(_ProfilerPid, _Options) -> + erlang:nif_error(undefined). + +%% throw/1 +%% Shadowed by erl_bif_types: erlang:throw/1 +-spec throw(Any) -> no_return() when + Any :: term(). +throw(_Any) -> + erlang:nif_error(undefined). + +%% time/0 +-spec time() -> Time when + Time :: calendar:time(). +time() -> + erlang:nif_error(undefined). + +%% trace/3 +-spec erlang:trace(PidSpec, How, FlagList) -> integer() when + PidSpec :: pid() | existing | new | all, + How :: boolean(), + FlagList :: [trace_flag()]. +trace(_PidSpec, _How, _FlagList) -> + erlang:nif_error(undefined). + +%% trace_delivered/1 +-spec erlang:trace_delivered(Tracee) -> Ref when + Tracee :: pid() | all, + Ref :: reference(). +trace_delivered(_Tracee) -> + erlang:nif_error(undefined). + +%% trace_info/2 +-spec erlang:trace_info(PidOrFunc, Item) -> Res when + PidOrFunc :: pid() | new | {Module, Function, Arity} | on_load, + Module :: module(), + Function :: atom(), + Arity :: arity(), + Item :: flags | tracer | traced | match_spec | meta | meta_match_spec | call_count | call_time | all, + Res :: trace_info_return(). +trace_info(_PidOrFunc, _Item) -> + erlang:nif_error(undefined). + +%% trunc/1 +%% Shadowed by erl_bif_types: erlang:trunc/1 +-spec trunc(Number) -> integer() when + Number :: number(). +trunc(_Number) -> + erlang:nif_error(undefined). + +%% tuple_size/1 +%% Shadowed by erl_bif_types: erlang:tuple_size/1 +-spec tuple_size(Tuple) -> non_neg_integer() when + Tuple :: tuple(). +tuple_size(_Tuple) -> + erlang:nif_error(undefined). + +%% universaltime/0 +-spec erlang:universaltime() -> DateTime when + DateTime :: calendar:datetime(). +universaltime() -> + erlang:nif_error(undefined). + +%% universaltime_to_posixtime/1 +-spec erlang:universaltime_to_posixtime(P1) -> integer() when + P1 :: {calendar:date(), calendar:time()}. +universaltime_to_posixtime(_P1) -> + erlang:nif_error(undefined). + +%% unlink/1 +-spec unlink(Id) -> true when + Id :: pid() | port(). +unlink(_Id) -> + erlang:nif_error(undefined). + +%% unregister/1 +-spec unregister(RegName) -> true when + RegName :: atom(). +unregister(_RegName) -> + erlang:nif_error(undefined). + +%% whereis/1 +-spec whereis(RegName) -> pid() | port() | undefined when + RegName :: atom(). +whereis(_RegName) -> + erlang:nif_error(undefined). + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%%% More complicated native code BIFs +%%% These are here for the types/specs, the real implementation is in the C code. +%%% This chunk is handwritten, i.e. contains more complicated specs. +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + +%% types and specs + +%% Shadowed by erl_bif_types: erlang:abs/1 +-spec abs(Float) -> float() when + Float :: float(); + (Int) -> non_neg_integer() when + Int :: integer(). +abs(_Number) -> + erlang:nif_error(undefined). + +%% Not documented +%% Shadowed by erl_bif_types: erlang:append/2 +-spec erlang:append(List,Tail) -> maybe_improper_list() when + List :: [term()], + Tail :: term(). +append(_List,_Tail) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:element/2 +-spec element(N, Tuple) -> term() when + N :: pos_integer(), + Tuple :: tuple(). +element(_N, _Tuple) -> + erlang:nif_error(undefined). + +%% Not documented +-spec erlang:get_module_info(Module, Item) -> ModuleInfo when + Module :: atom(), + Item :: module | imports | exports | functions | attributes | compile | native_addresses, + ModuleInfo :: atom() | [] | [{atom(), arity()}] | [{atom(), term()}] | [{atom(), arity(), integer()}]. +get_module_info(_Module, _Item) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:hd/1 +-spec hd(List) -> term() when + List :: [term(), ...]. +hd(_List) -> + erlang:nif_error(undefined). + +%% erlang:info/1 no longer exists! + +%% Shadowed by erl_bif_types: erlang:is_atom/1 +-spec is_atom(Term) -> boolean() when + Term :: term(). +is_atom(_Term) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:is_binary/1 +-spec is_binary(Term) -> boolean() when + Term :: term(). +is_binary(_Term) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:is_bitstring/1 +-spec is_bitstring(Term) -> boolean() when + Term :: term(). +is_bitstring(_Term) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:is_boolean/1 +-spec is_boolean(Term) -> boolean() when + Term :: term(). +is_boolean(_Term) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:is_float/1 +-spec is_float(Term) -> boolean() when + Term :: term(). +is_float(_Term) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:is_function/1 +-spec is_function(Term) -> boolean() when + Term :: term(). +is_function(_Term) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:is_function/2 +-spec is_function(Term, Arity) -> boolean() when + Term :: term(), + Arity :: arity(). +is_function(_Term, _Arity) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:is_integer/1 +-spec is_integer(Term) -> boolean() when + Term :: term(). +is_integer(_Term) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:is_list/1 +-spec is_list(Term) -> boolean() when + Term :: term(). +is_list(_Term) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:is_number/1 +-spec is_number(Term) -> boolean() when + Term :: term(). +is_number(_Term) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:is_pid/1 +-spec is_pid(Term) -> boolean() when + Term :: term(). +is_pid(_Term) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:is_port/1 +-spec is_port(Term) -> boolean() when + Term :: term(). +is_port(_Term) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:is_record/2 +-spec is_record(Term,RecordTag) -> boolean() when + Term :: term(), + RecordTag :: atom(). +is_record(_Term,_RecordTag) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:is_record/3 +-spec is_record(Term,RecordTag,Size) -> boolean() when + Term :: term(), + RecordTag :: atom(), + Size :: non_neg_integer(). +is_record(_Term,_RecordTag,_Size) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:is_reference/1 +-spec is_reference(Term) -> boolean() when + Term :: term(). +is_reference(_Term) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:is_tuple/1 +-spec is_tuple(Term) -> boolean() when + Term :: term(). +is_tuple(_Term) -> + erlang:nif_error(undefined). + +-spec load_module(Module, Binary) -> {module, Module} | {error, Reason} when + Module :: module(), + Binary :: binary(), + Reason :: badfile | not_purged | on_load. +load_module(Mod, Code) -> + case erlang:prepare_loading(Mod, Code) of + {error,_}=Error -> + Error; + Bin when erlang:is_binary(Bin) -> + case erlang:finish_loading([Bin]) of + ok -> + {module,Mod}; + {Error,[Mod]} -> + {error,Error} + end + end. + +-spec erlang:load_nif(Path, LoadInfo) -> ok | Error when + Path :: string(), + LoadInfo :: term(), + Error :: {error, {Reason, Text :: string()}}, + Reason :: load_failed | bad_lib | load | reload | upgrade | old_code. +load_nif(_Path, _LoadInfo) -> + erlang:nif_error(undefined). + +-spec erlang:localtime_to_universaltime(Localtime, IsDst) -> Universaltime when + Localtime :: calendar:datetime(), + Universaltime :: calendar:datetime(), + IsDst :: true | false | undefined. +localtime_to_universaltime(_Localtime, _IsDst) -> + erlang:nif_error(undefined). + +%% CHECK! Why the strange very thorough specification of the error +%% condition with disallowed arity in erl_bif_types? +%% Not documented +-spec erlang:make_fun(Module, Function, Arity) -> function() when + Module :: atom(), + Function :: atom(), + Arity :: arity(). +make_fun(_Module,_Function, _Arity) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:make_tuple/2 +-spec erlang:make_tuple(Arity, InitialValue) -> tuple() when + Arity :: arity(), + InitialValue :: term(). +make_tuple(_Arity,_InitialValue) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:make_tuple/3 +-spec erlang:make_tuple(Arity, DefaultValue, InitList) -> tuple() when + Arity :: arity(), + DefaultValue :: term(), + InitList :: [{Position :: pos_integer(), term()}]. +make_tuple(_Arity,_DefaultValue,_InitList) -> + erlang:nif_error(undefined). + +-spec nodes(Arg) -> Nodes when + Arg :: NodeType | [NodeType], + NodeType :: visible | hidden | connected | this | known, + Nodes :: [node()]. +nodes(_Arg) -> + erlang:nif_error(undefined). + +-spec open_port(PortName, PortSettings) -> port() when + PortName :: {spawn, Command :: string()} | + {spawn_driver, Command :: [byte()]} | + {spawn_executable, FileName :: file:name() } | + {fd, In :: non_neg_integer(), Out :: non_neg_integer()}, + PortSettings :: [Opt], + Opt :: {packet, N :: 1 | 2 | 4} + | stream + | {line, L :: non_neg_integer()} + | {cd, Dir :: string()} + | {env, Env :: [{Name :: string(), Val :: string() | false}]} + | {args, [string() | binary()]} + | {arg0, string() | binary()} + | exit_status + | use_stdio + | nouse_stdio + | stderr_to_stdout + | in + | out + | binary + | eof. +open_port(_PortName,_PortSettings) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:port_call/2 +-spec erlang:port_call(Port, Data) -> term() when + Port :: port() | atom(), + Data :: term(). +port_call(_Port, _Data) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:port_call/3 +-spec erlang:port_call(Port, Operation, Data) -> term() when + Port :: port() | atom(), + Operation :: integer(), + Data :: term(). +port_call(_Port, _Operation, _Data) -> + erlang:nif_error(undefined). + +-type port_info_item() :: + registered_name | + id | + connected | + links | + name | + input | + output | + os_pid. + +-type port_info_result_item() :: + {registered_name, RegName :: atom()} | + {id, Index :: non_neg_integer()} | + {connected, Pid :: pid()} | + {links, Pids :: [pid()]} | + {name, String :: string()} | + {input, Bytes :: non_neg_integer()} | + {output, Bytes :: non_neg_integer()} | + {os_pid, OsPid :: non_neg_integer() | 'undefined'}. + +%% Shadowed by erl_bif_types: erlang:port_info/1 +-spec erlang:port_info(Port) -> Result when + Port :: port() | atom(), + Result :: [port_info_result_item()] | undefined. +port_info(_Result) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:port_info/2 +-spec erlang:port_info(Port, Item) -> Result when + Port :: port() | atom(), + Item :: port_info_item(), + Result :: port_info_result_item() | undefined. +port_info(_Result, _Item) -> + erlang:nif_error(undefined). + +-type priority_level() :: + low | normal | high | max. + +-spec process_flag(trap_exit, Boolean) -> OldBoolean when + Boolean :: boolean(), + OldBoolean :: boolean(); + (error_handler, Module) -> OldModule when + Module :: atom(), + OldModule :: atom(); + (min_heap_size, MinHeapSize) -> OldMinHeapSize when + MinHeapSize :: non_neg_integer(), + OldMinHeapSize :: non_neg_integer(); + (min_bin_vheap_size, MinBinVHeapSize) -> OldMinBinVHeapSize when + MinBinVHeapSize :: non_neg_integer(), + OldMinBinVHeapSize :: non_neg_integer(); + (priority, Level) -> OldLevel when + Level :: priority_level(), + OldLevel :: priority_level(); + (save_calls, N) -> OldN when + N :: 0..10000, + OldN :: 0..10000; + (sensitive, Boolean) -> OldBoolean when + Boolean :: boolean(), + OldBoolean :: boolean(); + %% Deliberately not documented. + ({monitor_nodes, term()}, term()) -> term(); + (monitor_nodes, term()) -> term(). + +process_flag(_Flag, _Value) -> + erlang:nif_error(undefined). + +-type process_info_item() :: + backtrace | + binary | + catchlevel | + current_function | + current_location | + current_stacktrace | + dictionary | + error_handler | + garbage_collection | + group_leader | + heap_size | + initial_call | + links | + last_calls | + memory | + message_que_len | + messages | + min_heap_size | + min_bin_vheap_size | + monitored_by | + monitors | + priority | + reductions | + registered_name | + sequential_trace_token | + stack_size | + status | + suspending | + total_heap_size | + trace | + trap_exit. + +-type process_info_result_item() :: + {backtrace, Bin :: binary()} | + {binary, BinInfo :: [{non_neg_integer(), + non_neg_integer(), + non_neg_integer()}]} | + {catchlevel, CatchLevel :: non_neg_integer()} | + {current_function, + {Module :: module(), Function :: atom(), Arity :: arity()}} | + {current_location, + {Module :: module(), Function :: atom(), Arity :: arity(), + Location :: [{file, Filename :: string()} | % not a stack_item()! + {line, Line :: pos_integer()}]}} | + {current_stacktrace, Stack :: [stack_item()]} | + {dictionary, Dictionary :: [{Key :: term(), Value :: term()}]} | + {error_handler, Module :: module()} | + {garbage_collection, GCInfo :: [{atom(),non_neg_integer()}]} | + {group_leader, GroupLeader :: pid()} | + {heap_size, Size :: non_neg_integer()} | + {initial_call, mfa()} | + {links, Pids :: [pid()]} | + {last_calls, false | (Calls :: [mfa()])} | + {memory, Size :: non_neg_integer()} | + {message_que_len, MessageQueueLen :: non_neg_integer()} | + {messages, MessageQueue :: [term()]} | + {min_heap_size, MinHeapSize :: non_neg_integer()} | + {min_bin_vheap_size, MinBinVHeapSize :: non_neg_integer()} | + {monitored_by, Pids :: [pid()]} | + {monitors, + Monitors :: [{process, Pid :: pid() | + {RegName :: atom(), Node :: node()}}]} | + {priority, Level :: priority_level()} | + {reductions, Number :: non_neg_integer()} | + {registered_name, Atom :: atom()} | + {sequential_trace_token, [] | (SequentialTraceToken :: term())} | + {stack_size, Size :: non_neg_integer()} | + {status, Status :: exiting | garbage_collecting | waiting | running | runnable | suspended} | + {suspending, + SuspendeeList :: [{Suspendee :: pid(), + ActiveSuspendCount :: non_neg_integer(), + OutstandingSuspendCount ::non_neg_integer()}]} | + {total_heap_size, Size :: non_neg_integer()} | + {trace, InternalTraceFlags :: non_neg_integer()} | + {trap_exit, Boolean :: boolean()}. + +-type stack_item() :: + {Module :: module(), + Function :: atom(), + Arity :: arity() | (Args :: [term()]), + Location :: [{file, Filename :: string()} | + {line, Line :: pos_integer()}]}. + +-spec process_info(Pid, Item) -> + InfoTuple | [] | undefined when + Pid :: pid(), + Item :: process_info_item(), + InfoTuple :: process_info_result_item(); + (Pid, ItemList) -> InfoTupleList | [] | undefined when + Pid :: pid(), + ItemList :: [Item], + Item :: process_info_item(), + InfoTupleList :: [InfoTuple], + InfoTuple :: process_info_result_item(). +process_info(_Pid,_ItemSpec) -> + erlang:nif_error(undefined). + +-spec erlang:send(Dest, Msg) -> Msg when + Dest :: dst(), + Msg :: term(). +send(_Dest,_Msg) -> + erlang:nif_error(undefined). + +-spec erlang:send(Dest, Msg, Options) -> Res when + Dest :: dst(), + Msg :: term(), + Options :: [nosuspend | noconnect], + Res :: ok | nosuspend | noconnect. +send(_Dest,_Msg,_Options) -> + erlang:nif_error(undefined). + +%% Not documented +-spec erlang:seq_trace_info(send) -> {send, boolean()}; + ('receive') -> {'receive', boolean()}; + (print) -> {print, boolean()}; + (timestamp) -> {timestamp, boolean()}; + (label) -> [] | {label, non_neg_integer()}; + (serial) -> [] | {serial, {non_neg_integer(), non_neg_integer()}}. +seq_trace_info(_What) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:setelement/3 +-spec setelement(Index, Tuple1, Value) -> Tuple2 when + Index :: pos_integer(), + Tuple1 :: tuple(), + Tuple2 :: tuple(), + Value :: term(). +setelement(_Index, _Tuple1, _Value) -> + erlang:nif_error(undefined). + +-spec erlang:spawn_opt({Module, Function, Args, Options}) -> pid() | {pid(), reference()} when + Module :: module(), + Function :: atom(), + Args :: [term()], + Options :: [Option], + Option :: link | monitor | {priority, Level} + | {fullsweep_after, Number :: non_neg_integer()} + | {min_heap_size, Size :: non_neg_integer()} + | {min_bin_vheap_size, VSize :: non_neg_integer()}, + Level :: low | normal | high. +spawn_opt(_Tuple) -> + erlang:nif_error(undefined). + +-spec statistics(context_switches) -> {ContextSwitches,0} when + ContextSwitches :: non_neg_integer(); + (exact_reductions) -> {Total_Exact_Reductions, + Exact_Reductions_Since_Last_Call} when + Total_Exact_Reductions :: non_neg_integer(), + Exact_Reductions_Since_Last_Call :: non_neg_integer(); + (garbage_collection) -> {Number_of_GCs, Words_Reclaimed, 0} when + Number_of_GCs :: non_neg_integer(), + Words_Reclaimed :: non_neg_integer(); + (io) -> {{input, Input}, {output, Output}} when + Input :: non_neg_integer(), + Output :: non_neg_integer(); + (reductions) -> {Total_Reductions, + Reductions_Since_Last_Call} when + Total_Reductions :: non_neg_integer(), + Reductions_Since_Last_Call :: non_neg_integer(); + (run_queue) -> non_neg_integer(); + (runtime) -> {Total_Run_Time, Time_Since_Last_Call} when + Total_Run_Time :: non_neg_integer(), + Time_Since_Last_Call :: non_neg_integer(); + (scheduler_wall_time) -> [{SchedulerId, ActiveTime, TotalTime}] | undefined when + SchedulerId :: pos_integer(), + ActiveTime :: non_neg_integer(), + TotalTime :: non_neg_integer(); + (wall_clock) -> {Total_Wallclock_Time, + Wallclock_Time_Since_Last_Call} when + Total_Wallclock_Time :: non_neg_integer(), + Wallclock_Time_Since_Last_Call :: non_neg_integer(). +statistics(_Item) -> + erlang:nif_error(undefined). + +%% Not documented +%% Shadowed by erl_bif_types: erlang:subtract/2 +-spec erlang:subtract([term()], [term()]) -> [term()]. +subtract(_,_) -> + erlang:nif_error(undefined). + +-type scheduler_bind_type() :: + 'no_node_processor_spread' | + 'no_node_thread_spread' | + 'no_spread' | + 'processor_spread' | + 'spread' | + 'thread_spread' | + 'thread_no_node_processor_spread' | + 'unbound'. + +-spec erlang:system_flag(backtrace_depth, Depth) -> OldDepth when + Depth :: non_neg_integer(), + OldDepth :: non_neg_integer(); + (cpu_topology, CpuTopology) -> OldCpuTopology when + CpuTopology :: cpu_topology(), + OldCpuTopology :: cpu_topology(); + (fullsweep_after, Number) -> OldNumber when + Number :: non_neg_integer(), + OldNumber :: non_neg_integer(); + (min_heap_size, MinHeapSize) -> OldMinHeapSize when + MinHeapSize :: non_neg_integer(), + OldMinHeapSize :: non_neg_integer(); + (min_bin_vheap_size, MinBinVHeapSize) -> + OldMinBinVHeapSize when + MinBinVHeapSize :: non_neg_integer(), + OldMinBinVHeapSize :: non_neg_integer(); + (multi_scheduling, BlockState) -> OldBlockState when + BlockState :: block | unblock, + OldBlockState :: block | unblock | enabled; + (scheduler_bind_type, How) -> OldBindType when + How :: scheduler_bind_type() | default_bind, + OldBindType :: scheduler_bind_type(); + (scheduler_wall_time, Boolean) -> OldBoolean when + Boolean :: boolean(), + OldBoolean :: boolean(); + (schedulers_online, SchedulersOnline) -> + OldSchedulersOnline when + SchedulersOnline :: pos_integer(), + OldSchedulersOnline :: pos_integer(); + (trace_control_word, TCW) -> OldTCW when + TCW :: non_neg_integer(), + OldTCW :: non_neg_integer(); + %% These are deliberately not documented + (internal_cpu_topology, term()) -> term(); + (sequential_tracer, pid() | port() | false) -> pid() | port() | false; + (1,0) -> true. + +system_flag(_Flag, _Value) -> + erlang:nif_error(undefined). + +-spec term_to_binary(Term) -> ext_binary() when + Term :: term(). +term_to_binary(_Term) -> + erlang:nif_error(undefined). + +-spec term_to_binary(Term, Options) -> ext_binary() when + Term :: term(), + Options :: [compressed | + {compressed, Level :: 0..9} | + {minor_version, Version :: 0..1} ]. +term_to_binary(_Term, _Options) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:tl/1 +-spec tl(List) -> term() when + List :: [term(), ...]. +tl(_List) -> + erlang:nif_error(undefined). + +-type trace_pattern_mfa() :: + {atom(),atom(),arity() | '_'} | on_load. +-type trace_match_spec() :: + [{[term()] | '_' ,[term()],[term()]}]. + +-spec erlang:trace_pattern(MFA, MatchSpec) -> non_neg_integer() when + MFA :: trace_pattern_mfa(), + MatchSpec :: (MatchSpecList :: trace_match_spec()) + | boolean() + | restart + | pause. +trace_pattern(_MFA, _MatchSpec) -> + erlang:nif_error(undefined). + +-type trace_pattern_flag() :: + global | local | + meta | {meta, Pid :: pid()} | + call_count | + call_time. + +-spec erlang:trace_pattern(MFA, MatchSpec, FlagList) -> non_neg_integer() when + MFA :: trace_pattern_mfa(), + MatchSpec :: (MatchSpecList :: trace_match_spec()) + | boolean() + | restart + | pause, + FlagList :: [ trace_pattern_flag() ]. +trace_pattern(_MFA, _MatchSpec, _FlagList) -> + erlang:nif_error(undefined). + +%% Shadowed by erl_bif_types: erlang:tuple_to_list/1 +-spec tuple_to_list(Tuple) -> [term()] when + Tuple :: tuple(). +tuple_to_list(_Tuple) -> + erlang:nif_error(undefined). + +-type cpu_topology() :: + [LevelEntry :: level_entry()] | undefined. +-type level_entry() :: + {LevelTag :: level_tag(), SubLevel :: sub_level()} + | {LevelTag :: level_tag(), + InfoList :: info_list(), + SubLevel :: sub_level()}. +-type level_tag() :: core | node | processor | thread. +-type sub_level() :: [LevelEntry :: level_entry()] + | (LogicalCpuId :: {logical, non_neg_integer()}). +-type info_list() :: []. + +%% Note: changing the ordering number of a clause will change the docs! +%% Shadowed by erl_bif_types: erlang:system_info/1 +-spec erlang:system_info + (allocated_areas) -> [ tuple() ]; + (allocator) -> + {Allocator, Version, Features, Settings} when + Allocator :: undefined | glibc, + Version :: [non_neg_integer()], + Features :: [atom()], + Settings :: [{Subsystem :: atom(), + [{Parameter :: atom(), + Value :: term()}]}]; + (alloc_util_allocators) -> [Alloc] when + Alloc :: atom(); + ({allocator, Alloc}) -> [_] when %% More or less anything + Alloc :: atom(); + ({allocator_sizes, Alloc}) -> [_] when %% More or less anything + Alloc :: atom(); + (build_type) -> opt | debug | purify | quantify | purecov | + gcov | valgrind | gprof | lcnt; + (c_compiler_used) -> {atom(), term()}; + (check_io) -> [_]; + (compat_rel) -> integer(); + (cpu_topology) -> CpuTopology when + CpuTopology :: cpu_topology(); + ({cpu_topology, defined | detected | used}) -> CpuTopology when + CpuTopology :: cpu_topology(); + (creation) -> integer(); + (debug_compiled) -> boolean(); + (dist) -> binary(); + (dist_ctrl) -> {Node :: node(), + ControllingEntity :: port() | pid()}; + (driver_version) -> string(); + (dynamic_trace) -> none | dtrace | systemtap; + (dynamic_trace_probes) -> boolean(); + (elib_malloc) -> false; + (dist_buf_busy_limit) -> non_neg_integer(); + (fullsweep_after) -> {fullsweep_after, non_neg_integer()}; + (garbage_collection) -> [{atom(), integer()}]; + (heap_sizes) -> [non_neg_integer()]; + (heap_type) -> private; + (info) -> binary(); + (kernel_poll) -> boolean(); + (loaded) -> binary(); + (logical_processors | + logical_processors_available | + logical_processors_online) -> unknown | pos_integer(); + (machine) -> string(); + (min_heap_size) -> {min_heap_size, MinHeapSize :: pos_integer()}; + (min_bin_vheap_size) -> {min_bin_vheap_size, + MinBinVHeapSize :: pos_integer()}; + (modified_timing_level) -> integer() | undefined; + (multi_scheduling) -> disabled | blocked | enabled; + (multi_scheduling_blockers) -> [PID :: pid()]; + (otp_release) -> string(); + (process_count) -> pos_integer(); + (process_limit) -> pos_integer(); + (procs) -> binary(); + (scheduler_bind_type) -> spread | + processor_spread | + thread_spread | + thread_no_node_processor_spread | + no_node_processor_spread | + no_node_thread_spread | + no_spread | + unbound; + (scheduler_bindings) -> tuple(); + (scheduler_id) -> SchedulerId :: pos_integer(); + (schedulers | schedulers_online) -> pos_integer(); + (smp_support) -> boolean(); + (system_version) -> string(); + (system_architecture) -> string(); + (threads) -> boolean(); + (thread_pool_size) -> non_neg_integer(); + (trace_control_word) -> non_neg_integer(); + (update_cpu_info) -> changed | unchanged; + (version) -> string(); + (wordsize | {wordsize, internal} | {wordsize, external}) -> 4 | 8. +system_info(_Item) -> + erlang:nif_error(undefined). + +-spec erlang:universaltime_to_localtime(Universaltime) -> Localtime when + Localtime :: calendar:datetime(), + Universaltime :: calendar:datetime(). +universaltime_to_localtime(_Universaltime) -> + erlang:nif_error(undefined). + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%%% End of native code BIFs +%%% Actual Erlang implementation of some BIF's follow +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + %%-------------------------------------------------------------------------- -spec apply(Fun, Args) -> term() when @@ -71,6 +2182,7 @@ apply(Fun, Args) -> erlang:apply(Fun, Args). +%% Shadowed by erl_bif_types: erlang:apply/3 -spec apply(Module, Function, Args) -> term() when Module :: module(), Function :: atom(), @@ -82,42 +2194,42 @@ apply(Mod, Name, Args) -> -spec spawn(Fun) -> pid() when Fun :: function(). -spawn(F) when is_function(F) -> - spawn(erlang, apply, [F, []]); -spawn({M,F}=MF) when is_atom(M), is_atom(F) -> - spawn(erlang, apply, [MF, []]); +spawn(F) when erlang:is_function(F) -> + erlang:spawn(erlang, apply, [F, []]); +spawn({M,F}=MF) when erlang:is_atom(M), erlang:is_atom(F) -> + erlang:spawn(erlang, apply, [MF, []]); spawn(F) -> erlang:error(badarg, [F]). -spec spawn(Node, Fun) -> pid() when Node :: node(), Fun :: function(). -spawn(N, F) when N =:= node() -> - spawn(F); -spawn(N, F) when is_function(F) -> - spawn(N, erlang, apply, [F, []]); -spawn(N, {M,F}=MF) when is_atom(M), is_atom(F) -> - spawn(N, erlang, apply, [MF, []]); +spawn(N, F) when N =:= erlang:node() -> + erlang:spawn(F); +spawn(N, F) when erlang:is_function(F) -> + erlang:spawn(N, erlang, apply, [F, []]); +spawn(N, {M,F}=MF) when erlang:is_atom(M), erlang:is_atom(F) -> + erlang:spawn(N, erlang, apply, [MF, []]); spawn(N, F) -> erlang:error(badarg, [N, F]). -spec spawn_link(Fun) -> pid() when Fun :: function(). -spawn_link(F) when is_function(F) -> - spawn_link(erlang, apply, [F, []]); -spawn_link({M,F}=MF) when is_atom(M), is_atom(F) -> - spawn_link(erlang, apply, [MF, []]); +spawn_link(F) when erlang:is_function(F) -> + erlang:spawn_link(erlang, apply, [F, []]); +spawn_link({M,F}=MF) when erlang:is_atom(M), erlang:is_atom(F) -> + erlang:spawn_link(erlang, apply, [MF, []]); spawn_link(F) -> erlang:error(badarg, [F]). -spec spawn_link(Node, Fun) -> pid() when Node :: node(), Fun :: function(). -spawn_link(N, F) when N =:= node() -> +spawn_link(N, F) when N =:= erlang:node() -> spawn_link(F); -spawn_link(N, F) when is_function(F) -> +spawn_link(N, F) when erlang:is_function(F) -> spawn_link(N, erlang, apply, [F, []]); -spawn_link(N, {M,F}=MF) when is_atom(M), is_atom(F) -> +spawn_link(N, {M,F}=MF) when erlang:is_atom(M), erlang:is_atom(F) -> spawn_link(N, erlang, apply, [MF, []]); spawn_link(N, F) -> erlang:error(badarg, [N, F]). @@ -126,7 +2238,7 @@ spawn_link(N, F) -> -spec spawn_monitor(Fun) -> {pid(), reference()} when Fun :: function(). -spawn_monitor(F) when is_function(F, 0) -> +spawn_monitor(F) when erlang:is_function(F, 0) -> erlang:spawn_opt({erlang,apply,[F,[]],[monitor]}); spawn_monitor(F) -> erlang:error(badarg, [F]). @@ -135,7 +2247,9 @@ spawn_monitor(F) -> Module :: module(), Function :: atom(), Args :: [term()]. -spawn_monitor(M, F, A) when is_atom(M), is_atom(F), is_list(A) -> +spawn_monitor(M, F, A) when erlang:is_atom(M), + erlang:is_atom(F), + erlang:is_list(A) -> erlang:spawn_opt({M,F,A,[monitor]}); spawn_monitor(M, F, A) -> erlang:error(badarg, [M,F,A]). @@ -148,9 +2262,9 @@ spawn_monitor(M, F, A) -> | {min_heap_size, Size :: non_neg_integer()} | {min_bin_vheap_size, VSize :: non_neg_integer()}, Level :: low | normal | high. -spawn_opt(F, O) when is_function(F) -> +spawn_opt(F, O) when erlang:is_function(F) -> spawn_opt(erlang, apply, [F, []], O); -spawn_opt({M,F}=MF, O) when is_atom(M), is_atom(F) -> +spawn_opt({M,F}=MF, O) when erlang:is_atom(M), erlang:is_atom(F) -> spawn_opt(erlang, apply, [MF, []], O); spawn_opt({M,F,A}, O) -> % For (undocumented) backward compatibility spawn_opt(M, F, A, O); @@ -166,11 +2280,11 @@ spawn_opt(F, O) -> | {min_heap_size, Size :: non_neg_integer()} | {min_bin_vheap_size, VSize :: non_neg_integer()}, Level :: low | normal | high. -spawn_opt(N, F, O) when N =:= node() -> +spawn_opt(N, F, O) when N =:= erlang:node() -> spawn_opt(F, O); -spawn_opt(N, F, O) when is_function(F) -> +spawn_opt(N, F, O) when erlang:is_function(F) -> spawn_opt(N, erlang, apply, [F, []], O); -spawn_opt(N, {M,F}=MF, O) when is_atom(M), is_atom(F) -> +spawn_opt(N, {M,F}=MF, O) when erlang:is_atom(M), erlang:is_atom(F) -> spawn_opt(N, erlang, apply, [MF, []], O); spawn_opt(N, F, O) -> erlang:error(badarg, [N, F, O]). @@ -182,9 +2296,14 @@ spawn_opt(N, F, O) -> Module :: module(), Function :: atom(), Args :: [term()]. -spawn(N,M,F,A) when N =:= node(), is_atom(M), is_atom(F), is_list(A) -> - spawn(M,F,A); -spawn(N,M,F,A) when is_atom(N), is_atom(M), is_atom(F) -> +spawn(N,M,F,A) when N =:= erlang:node(), + erlang:is_atom(M), + erlang:is_atom(F), + erlang:is_list(A) -> + erlang:spawn(M,F,A); +spawn(N,M,F,A) when erlang:is_atom(N), + erlang:is_atom(M), + erlang:is_atom(F) -> case is_well_formed_list(A) of true -> ok; @@ -192,9 +2311,9 @@ spawn(N,M,F,A) when is_atom(N), is_atom(M), is_atom(F) -> erlang:error(badarg, [N, M, F, A]) end, case catch gen_server:call({net_kernel,N}, - {spawn,M,F,A,group_leader()}, + {spawn,M,F,A,erlang:group_leader()}, infinity) of - Pid when is_pid(Pid) -> + Pid when erlang:is_pid(Pid) -> Pid; Error -> case remote_spawn_error(Error, {no_link, N, M, F, A, []}) of @@ -212,9 +2331,14 @@ spawn(N,M,F,A) -> Module :: module(), Function :: atom(), Args :: [term()]. -spawn_link(N,M,F,A) when N =:= node(), is_atom(M), is_atom(F), is_list(A) -> - spawn_link(M,F,A); -spawn_link(N,M,F,A) when is_atom(N), is_atom(M), is_atom(F) -> +spawn_link(N,M,F,A) when N =:= erlang:node(), + erlang:is_atom(M), + erlang:is_atom(F), + erlang:is_list(A) -> + erlang:spawn_link(M,F,A); +spawn_link(N,M,F,A) when erlang:is_atom(N), + erlang:is_atom(M), + erlang:is_atom(F) -> case is_well_formed_list(A) of true -> ok; @@ -222,9 +2346,9 @@ spawn_link(N,M,F,A) when is_atom(N), is_atom(M), is_atom(F) -> erlang:error(badarg, [N, M, F, A]) end, case catch gen_server:call({net_kernel,N}, - {spawn_link,M,F,A,group_leader()}, + {spawn_link,M,F,A,erlang:group_leader()}, infinity) of - Pid when is_pid(Pid) -> + Pid when erlang:is_pid(Pid) -> Pid; Error -> case remote_spawn_error(Error, {link, N, M, F, A, []}) of @@ -268,11 +2392,13 @@ spawn_opt(M, F, A, Opts) -> | {min_heap_size, Size :: non_neg_integer()} | {min_bin_vheap_size, VSize :: non_neg_integer()}, Level :: low | normal | high. -spawn_opt(N, M, F, A, O) when N =:= node(), - is_atom(M), is_atom(F), is_list(A), - is_list(O) -> +spawn_opt(N, M, F, A, O) when N =:= erlang:node(), + erlang:is_atom(M), erlang:is_atom(F), + erlang:is_list(A), erlang:is_list(O) -> spawn_opt(M, F, A, O); -spawn_opt(N, M, F, A, O) when is_atom(N), is_atom(M), is_atom(F) -> +spawn_opt(N, M, F, A, O) when erlang:is_atom(N), + erlang:is_atom(M), + erlang:is_atom(F) -> case {is_well_formed_list(A), is_well_formed_list(O)} of {true, true} -> ok; @@ -291,9 +2417,9 @@ spawn_opt(N, M, F, A, O) when is_atom(N), is_atom(M), is_atom(F) -> {no_link,[]}, O), case catch gen_server:call({net_kernel,N}, - {spawn_opt,M,F,A,NO,L,group_leader()}, + {spawn_opt,M,F,A,NO,L,erlang:group_leader()}, infinity) of - Pid when is_pid(Pid) -> + Pid when erlang:is_pid(Pid) -> Pid; Error -> case remote_spawn_error(Error, {L, N, M, F, A, NO}) of @@ -331,11 +2457,11 @@ is_well_formed_list(_) -> crasher(Node,Mod,Fun,Args,[],Reason) -> error_logger:warning_msg("** Can not start ~w:~w,~w on ~w **~n", [Mod,Fun,Args,Node]), - exit(Reason); + erlang:exit(Reason); crasher(Node,Mod,Fun,Args,Opts,Reason) -> error_logger:warning_msg("** Can not start ~w:~w,~w (~w) on ~w **~n", [Mod,Fun,Args,Opts,Node]), - exit(Reason). + erlang:exit(Reason). -spec erlang:yield() -> 'true'. yield() -> @@ -356,7 +2482,7 @@ disconnect_node(Node) -> Item :: arity | env | index | name | module | new_index | new_uniq | pid | type | uniq, Info :: term(). -fun_info(Fun) when is_function(Fun) -> +fun_info(Fun) when erlang:is_function(Fun) -> Keys = [type,env,arity,name,uniq,index,new_uniq,new_index,module,pid], fun_info_1(Keys, Fun, []). @@ -388,11 +2514,9 @@ send_nosuspend(Pid, Msg, Opts) -> _ -> false end. --spec erlang:localtime_to_universaltime({Date1, Time1}) -> {Date2, Time2} when - Date1 :: calendar:date(), - Date2 :: calendar:date(), - Time1 :: calendar:time(), - Time2 :: calendar:time(). +-spec erlang:localtime_to_universaltime(Localtime) -> Universaltime when + Localtime :: calendar:datetime(), + Universaltime :: calendar:datetime(). localtime_to_universaltime(Localtime) -> erlang:localtime_to_universaltime(Localtime, undefined). @@ -412,25 +2536,25 @@ suspend_process(P) -> %% reactivate the command. %% --spec dlink(pid() | port()) -> 'true'. +-spec erlang:dlink(pid() | port()) -> 'true'. dlink(Pid) -> - case net_kernel:connect(node(Pid)) of - true -> link(Pid); - false -> erlang:dist_exit(self(), noconnection, Pid), true + case net_kernel:connect(erlang:node(Pid)) of + true -> erlang:link(Pid); + false -> erlang:dist_exit(erlang:self(), noconnection, Pid), true end. %% Can this ever happen? --spec dunlink(identifier()) -> 'true'. +-spec erlang:dunlink(identifier()) -> 'true'. dunlink(Pid) -> - case net_kernel:connect(node(Pid)) of - true -> unlink(Pid); + case net_kernel:connect(erlang:node(Pid)) of + true -> erlang:unlink(Pid); false -> true end. dmonitor_node(Node, Flag, []) -> case net_kernel:connect(Node) of true -> erlang:monitor_node(Node, Flag, []); - false -> self() ! {nodedown, Node}, true + false -> erlang:self() ! {nodedown, Node}, true end; dmonitor_node(Node, Flag, Opts) -> @@ -438,31 +2562,31 @@ dmonitor_node(Node, Flag, Opts) -> true -> case net_kernel:passive_cnct(Node) of true -> erlang:monitor_node(Node, Flag, Opts); - false -> self() ! {nodedown, Node}, true + false -> erlang:self() ! {nodedown, Node}, true end; _ -> dmonitor_node(Node,Flag,[]) end. dgroup_leader(Leader, Pid) -> - case net_kernel:connect(node(Pid)) of - true -> group_leader(Leader, Pid); + case net_kernel:connect(erlang:node(Pid)) of + true -> erlang:group_leader(Leader, Pid); false -> true %% bad arg ? end. dexit(Pid, Reason) -> - case net_kernel:connect(node(Pid)) of - true -> exit(Pid, Reason); + case net_kernel:connect(erlang:node(Pid)) of + true -> erlang:exit(Pid, Reason); false -> true end. -dsend(Pid, Msg) when is_pid(Pid) -> - case net_kernel:connect(node(Pid)) of +dsend(Pid, Msg) when erlang:is_pid(Pid) -> + case net_kernel:connect(erlang:node(Pid)) of true -> erlang:send(Pid, Msg); false -> Msg end; -dsend(Port, Msg) when is_port(Port) -> - case net_kernel:connect(node(Port)) of +dsend(Port, Msg) when erlang:is_port(Port) -> + case net_kernel:connect(erlang:node(Port)) of true -> erlang:send(Port, Msg); false -> Msg end; @@ -473,13 +2597,13 @@ dsend({Name, Node}, Msg) -> ignored -> Msg % Not distributed. end. -dsend(Pid, Msg, Opts) when is_pid(Pid) -> - case net_kernel:connect(node(Pid)) of +dsend(Pid, Msg, Opts) when erlang:is_pid(Pid) -> + case net_kernel:connect(erlang:node(Pid)) of true -> erlang:send(Pid, Msg, Opts); false -> ok end; -dsend(Port, Msg, Opts) when is_port(Port) -> - case net_kernel:connect(node(Port)) of +dsend(Port, Msg, Opts) when erlang:is_port(Port) -> + case net_kernel:connect(erlang:node(Port)) of true -> erlang:send(Port, Msg, Opts); false -> ok end; @@ -490,21 +2614,23 @@ dsend({Name, Node}, Msg, Opts) -> ignored -> ok % Not distributed. end. --spec dmonitor_p('process', pid() | {atom(),atom()}) -> reference(). +-spec erlang:dmonitor_p('process', pid() | {atom(),atom()}) -> reference(). dmonitor_p(process, ProcSpec) -> %% ProcSpec = pid() | {atom(),atom()} %% ProcSpec CANNOT be an atom because a locally registered process %% is never handled here. Node = case ProcSpec of - {S,N} when is_atom(S), is_atom(N), N =/= node() -> N; - _ when is_pid(ProcSpec) -> node(ProcSpec) + {S,N} when erlang:is_atom(S), + erlang:is_atom(N), + N =/= erlang:node() -> N; + _ when erlang:is_pid(ProcSpec) -> erlang:node(ProcSpec) end, case net_kernel:connect(Node) of true -> erlang:monitor(process, ProcSpec); false -> - Ref = make_ref(), - self() ! {'DOWN', Ref, process, ProcSpec, noconnection}, + Ref = erlang:make_ref(), + erlang:self() ! {'DOWN', Ref, process, ProcSpec, noconnection}, Ref end. @@ -512,7 +2638,7 @@ dmonitor_p(process, ProcSpec) -> %% Trap function used when modified timing has been enabled. %% --spec delay_trap(Result, timeout()) -> Result. +-spec erlang:delay_trap(Result, timeout()) -> Result. delay_trap(Result, 0) -> erlang:yield(), Result; delay_trap(Result, Timeout) -> receive after Timeout -> Result end. @@ -526,12 +2652,12 @@ delay_trap(Result, Timeout) -> receive after Timeout -> Result end. -spec erlang:set_cookie(Node, Cookie) -> true when Node :: node(), Cookie :: atom(). -set_cookie(Node, C) when Node =/= nonode@nohost, is_atom(Node) -> - case is_atom(C) of +set_cookie(Node, C) when Node =/= nonode@nohost, erlang:is_atom(Node) -> + case erlang:is_atom(C) of true -> auth:set_cookie(Node, C); false -> - error(badarg) + erlang:error(badarg) end. -spec erlang:get_cookie() -> Cookie | nocookie when @@ -545,7 +2671,8 @@ get_cookie() -> integer_to_list(I, 10) -> erlang:integer_to_list(I); integer_to_list(I, Base) - when is_integer(I), is_integer(Base), Base >= 2, Base =< 1+$Z-$A+10 -> + when erlang:is_integer(I), erlang:is_integer(Base), + Base >= 2, Base =< 1+$Z-$A+10 -> if I < 0 -> [$-|integer_to_list(-I, Base, [])]; true -> @@ -575,9 +2702,10 @@ integer_to_list(I0, Base, R0) -> list_to_integer(L, 10) -> erlang:list_to_integer(L); list_to_integer(L, Base) - when is_list(L), is_integer(Base), Base >= 2, Base =< 1+$Z-$A+10 -> + when erlang:is_list(L), erlang:is_integer(Base), + Base >= 2, Base =< 1+$Z-$A+10 -> case list_to_integer_sign(L, Base) of - I when is_integer(I) -> + I when erlang:is_integer(I) -> I; Fault -> erlang:error(Fault, [L,Base]) @@ -587,7 +2715,7 @@ list_to_integer(L, Base) -> list_to_integer_sign([$-|[_|_]=L], Base) -> case list_to_integer(L, Base, 0) of - I when is_integer(I) -> + I when erlang:is_integer(I) -> -I; I -> I @@ -600,13 +2728,13 @@ list_to_integer_sign(_, _) -> badarg. list_to_integer([D|L], Base, I) - when is_integer(D), D >= $0, D =< $9, D < Base+$0 -> + when erlang:is_integer(D), D >= $0, D =< $9, D < Base+$0 -> list_to_integer(L, Base, I*Base + D-$0); list_to_integer([D|L], Base, I) - when is_integer(D), D >= $A, D < Base+$A-10 -> + when erlang:is_integer(D), D >= $A, D < Base+$A-10 -> list_to_integer(L, Base, I*Base + D-$A+10); list_to_integer([D|L], Base, I) - when is_integer(D), D >= $a, D < Base+$a-10 -> + when erlang:is_integer(D), D >= $a, D < Base+$a-10 -> list_to_integer(L, Base, I*Base + D-$a+10); list_to_integer([], _, I) -> I; @@ -618,7 +2746,8 @@ list_to_integer(_, _, _) -> %% erlang:demonitor(Ref, [flush]) traps to %% erlang:flush_monitor_message(Ref, Res) when %% it needs to flush a monitor message. -flush_monitor_message(Ref, Res) when is_reference(Ref), is_atom(Res) -> +flush_monitor_message(Ref, Res) when erlang:is_reference(Ref), + erlang:is_atom(Res) -> receive {_, Ref, _, _, _} -> ok after 0 -> ok end, Res. @@ -644,7 +2773,7 @@ set_cpu_topology(CpuTopology) -> cput_e2i_clvl({logical, _}, _PLvl) -> #cpu.logical; cput_e2i_clvl([E | _], PLvl) -> - case element(1, E) of + case erlang:element(1, E) of node -> case PLvl of 0 -> #cpu.node; #cpu.processor -> #cpu.processor_node @@ -713,7 +2842,7 @@ cput_e2i({thread, TL}, Nid, PId, #cpu{thread = T0} = CPU, PLvl, #cpu.thread, cput_e2i(TL, Nid, PId, CPU#cpu{thread = T0+1}, #cpu.thread, Lvl, Res); cput_e2i({logical, ID}, _Nid, PId, #cpu{processor=P, core=C, thread=T} = CPU, PLvl, #cpu.logical, Res) - when PLvl < #cpu.logical, is_integer(ID), 0 =< ID, ID < 65536 -> + when PLvl < #cpu.logical, erlang:is_integer(ID), 0 =< ID, ID < 65536 -> [CPU#cpu{processor = case P of -1 -> PId+1; _ -> P end, core = case C of -1 -> 0; _ -> C end, thread = case T of -1 -> 0; _ -> T end, @@ -738,9 +2867,9 @@ cput_i2e([], _Frst, _Lvl, _TM) -> cput_i2e([#cpu{logical = LID}| _], _Frst, Lvl, _TM) when Lvl == #cpu.logical -> {logical, LID}; cput_i2e([#cpu{} = I | Is], Frst, Lvl, TM) -> - cput_i2e(element(Lvl, I), Frst, Is, [I], Lvl, TM). + cput_i2e(erlang:element(Lvl, I), Frst, Is, [I], Lvl, TM). -cput_i2e(V, Frst, [I | Is], SameV, Lvl, TM) when V =:= element(Lvl, I) -> +cput_i2e(V, Frst, [I | Is], SameV, Lvl, TM) when V =:= erlang:element(Lvl, I) -> cput_i2e(V, Frst, Is, [I | SameV], Lvl, TM); cput_i2e(-1, true, [], SameV, Lvl, TM) -> cput_i2e(rvrs(SameV), true, Lvl+1, TM); @@ -754,10 +2883,10 @@ cput_i2e(_V, _Frst, Is, SameV, Lvl, TM) -> [{cput_i2e_tag(Lvl, TM), cput_i2e(rvrs(SameV), true, Lvl+1, TM)} | cput_i2e(Is, false, Lvl, TM)]. -cput_i2e_tag_map() -> list_to_tuple([cpu | record_info(fields, cpu)]). +cput_i2e_tag_map() -> erlang:list_to_tuple([cpu | record_info(fields, cpu)]). cput_i2e_tag(Lvl, TM) -> - case element(Lvl, TM) of processor_node -> node; Other -> Other end. + case erlang:element(Lvl, TM) of processor_node -> node; Other -> Other end. rvrs([_] = L) -> L; rvrs(Xs) -> rvrs(Xs, []). @@ -776,7 +2905,7 @@ rvrs([X|Xs],Ys) -> rvrs(Xs, [X|Ys]). %% functions in bif.c. Do not make %% any changes to it without reading %% the comment about them in bif.c! --spec await_proc_exit(dst(), 'apply' | 'data' | 'reason', term()) -> term(). +-spec erlang:await_proc_exit(dst(), 'apply' | 'data' | 'reason', term()) -> term(). await_proc_exit(Proc, Op, Data) -> Mon = erlang:monitor(process, Proc), receive @@ -814,7 +2943,9 @@ max(A, _) -> A. %% erts_memory() in $ERL_TOP/erts/emulator/beam/erl_alloc.c %% --type memory_type() :: 'total' | 'processes' | 'processes_used' | 'system' | 'atom' | 'atom_used' | 'binary' | 'code' | 'ets' | 'low' | 'maximum'. +-type memory_type() :: 'total' | 'processes' | 'processes_used' | 'system' + | 'atom' | 'atom_used' | 'binary' | 'code' | 'ets' + | 'low' | 'maximum'. -define(CARRIER_ALLOCS, [mseg_alloc, sbmbc_alloc, sbmbc_low_alloc]). -define(LOW_ALLOCS, [sbmbc_low_alloc, ll_low_alloc, std_low_alloc]). @@ -833,7 +2964,9 @@ max(A, _) -> A. low = 0, maximum = 0}). --spec memory() -> [{memory_type(), non_neg_integer()}]. +-spec erlang:memory() -> [{Type, Size}] when + Type :: memory_type(), + Size :: non_neg_integer(). memory() -> case aa_mem_data(au_mem_data(?ALL_NEEDED_ALLOCS)) of notsup -> @@ -858,8 +2991,9 @@ memory() -> {ets, Mem#memory.ets} | Tail] end. --spec memory(memory_type()|[memory_type()]) -> non_neg_integer() | [{memory_type(), non_neg_integer()}]. -memory(Type) when is_atom(Type) -> +-spec erlang:memory(Type :: memory_type()) -> non_neg_integer(); + (TypeList :: [memory_type()]) -> [{memory_type(), non_neg_integer()}]. +memory(Type) when erlang:is_atom(Type) -> {AA, ALCU, ChkSup, BadArgZero} = need_mem_info(Type), case get_mem_data(ChkSup, ALCU, AA) of notsup -> @@ -871,7 +3005,7 @@ memory(Type) when is_atom(Type) -> _ -> Value end end; -memory(Types) when is_list(Types) -> +memory(Types) when erlang:is_list(Types) -> {AA, ALCU, ChkSup, BadArgZeroList} = need_mem_info_list(Types), case get_mem_data(ChkSup, ALCU, AA) of notsup -> @@ -1079,7 +3213,7 @@ au_mem_data(EMD, []) -> EMD. au_mem_data(Allocs) -> - Ref = make_ref(), + Ref = erlang:make_ref(), erlang:system_info({allocator_sizes, Ref, Allocs}), receive_emd(Ref). @@ -1165,11 +3299,11 @@ alloc_info(Allocs) -> alloc_sizes(Allocs) -> get_alloc_info(allocator_sizes, Allocs). -get_alloc_info(Type, AAtom) when is_atom(AAtom) -> +get_alloc_info(Type, AAtom) when erlang:is_atom(AAtom) -> [{AAtom, Result}] = get_alloc_info(Type, [AAtom]), Result; -get_alloc_info(Type, AList) when is_list(AList) -> - Ref = make_ref(), +get_alloc_info(Type, AList) when erlang:is_list(AList) -> + Ref = erlang:make_ref(), erlang:system_info({Type, Ref, AList}), receive_allocator(Ref, erlang:system_info(schedulers), @@ -1206,7 +3340,7 @@ receive_allocator(Ref, N, Acc) -> receive_allocator(Ref, N-1, insert_info(InfoList, Acc)) end. --spec await_sched_wall_time_modifications(Ref, Result) -> boolean() when +-spec erlang:await_sched_wall_time_modifications(Ref, Result) -> boolean() when Ref :: reference(), Result :: boolean(). @@ -1214,12 +3348,12 @@ await_sched_wall_time_modifications(Ref, Result) -> sched_wall_time(Ref, erlang:system_info(schedulers)), Result. --spec gather_sched_wall_time_result(Ref) -> [{pos_integer(), - non_neg_integer(), - non_neg_integer()}] when +-spec erlang:gather_sched_wall_time_result(Ref) -> [{pos_integer(), + non_neg_integer(), + non_neg_integer()}] when Ref :: reference(). -gather_sched_wall_time_result(Ref) when is_reference(Ref) -> +gather_sched_wall_time_result(Ref) when erlang:is_reference(Ref) -> sched_wall_time(Ref, erlang:system_info(schedulers), []). sched_wall_time(_Ref, 0) -> diff --git a/erts/preloaded/src/prim_file.erl b/erts/preloaded/src/prim_file.erl index 0fc56c8c8e..d66f0e09cc 100644 --- a/erts/preloaded/src/prim_file.erl +++ b/erts/preloaded/src/prim_file.erl @@ -147,6 +147,32 @@ -define(POSIX_FADV_NOREUSE, 5). +%%% BIFs + +-export([internal_name2native/1, + internal_native2name/1, + internal_normalize_utf8/1]). + +-type unicode_string() :: [unicode:unicode_char()]. +-type prim_file_name() :: unicode_string() | unicode:unicode_binary(). + +-spec internal_name2native(prim_file_name()) -> binary(). + +internal_name2native(_) -> + erlang:nif_error(undefined). + +-spec internal_native2name(binary()) -> prim_file_name(). + +internal_native2name(_) -> + erlang:nif_error(undefined). + +-spec internal_normalize_utf8(unicode:unicode_binary()) -> unicode_string(). + +internal_normalize_utf8(_) -> + erlang:nif_error(undefined). + +%%% End of BIFs + %%%----------------------------------------------------------------- %%% Functions operating on a file through a handle. ?FD_DRV. %%% diff --git a/erts/preloaded/src/prim_inet.erl b/erts/preloaded/src/prim_inet.erl index 846ae97ed2..3c8a059269 100644 --- a/erts/preloaded/src/prim_inet.erl +++ b/erts/preloaded/src/prim_inet.erl @@ -1071,7 +1071,6 @@ enc_opt(deliver) -> ?INET_LOPT_DELIVER; enc_opt(exit_on_close) -> ?INET_LOPT_EXITONCLOSE; enc_opt(high_watermark) -> ?INET_LOPT_TCP_HIWTRMRK; enc_opt(low_watermark) -> ?INET_LOPT_TCP_LOWTRMRK; -enc_opt(bit8) -> ?INET_LOPT_BIT8; enc_opt(send_timeout) -> ?INET_LOPT_TCP_SEND_TIMEOUT; enc_opt(send_timeout_close) -> ?INET_LOPT_TCP_SEND_TIMEOUT_CLOSE; enc_opt(delay_send) -> ?INET_LOPT_TCP_DELAY_SEND; @@ -1125,7 +1124,6 @@ dec_opt(?INET_LOPT_DELIVER) -> deliver; dec_opt(?INET_LOPT_EXITONCLOSE) -> exit_on_close; dec_opt(?INET_LOPT_TCP_HIWTRMRK) -> high_watermark; dec_opt(?INET_LOPT_TCP_LOWTRMRK) -> low_watermark; -dec_opt(?INET_LOPT_BIT8) -> bit8; dec_opt(?INET_LOPT_TCP_SEND_TIMEOUT) -> send_timeout; dec_opt(?INET_LOPT_TCP_SEND_TIMEOUT_CLOSE) -> send_timeout_close; dec_opt(?INET_LOPT_TCP_DELAY_SEND) -> delay_send; @@ -1220,11 +1218,6 @@ type_opt_1(deliver) -> type_opt_1(exit_on_close) -> bool; type_opt_1(low_watermark) -> int; type_opt_1(high_watermark) -> int; -type_opt_1(bit8) -> - {enum,[{clear, ?INET_BIT8_CLEAR}, - {set, ?INET_BIT8_SET}, - {on, ?INET_BIT8_ON}, - {off, ?INET_BIT8_OFF}]}; type_opt_1(send_timeout) -> time; type_opt_1(send_timeout_close) -> bool; type_opt_1(delay_send) -> bool; diff --git a/erts/test/Makefile b/erts/test/Makefile index 68be3f2178..f79bb6e5f0 100644 --- a/erts/test/Makefile +++ b/erts/test/Makefile @@ -28,7 +28,6 @@ EBIN = . # ---------------------------------------------------- MODULES= \ - autoimport_SUITE \ erlc_SUITE \ install_SUITE \ nt_SUITE \ @@ -39,14 +38,11 @@ MODULES= \ erlexec_SUITE \ z_SUITE -ERL_XML = $(ERL_TOP)/erts/doc/src/erlang.xml -ERL_XML_TARGET = autoimport_SUITE_data/erlang.xml - ERL_FILES= $(MODULES:%=%.erl) TARGET_FILES = $(MODULES:%=$(EBIN)/%.$(EMULATOR)) -EXTRA_FILES = install_SUITE_data/install_bin $(ERL_XML_TARGET) +EXTRA_FILES = install_SUITE_data/install_bin # ---------------------------------------------------- # Release directory specification @@ -68,10 +64,6 @@ install_SUITE_data/install_bin: ../../make/install_bin rm -f $@ cp -p $< $@ -$(ERL_XML_TARGET): $(ERL_XML) - rm -f $@ - cp -p $< $@ - clean: rm -f $(TARGET_FILES) $(EXTRA_FILES) rm -f core *~ diff --git a/erts/test/autoimport_SUITE.erl b/erts/test/autoimport_SUITE.erl deleted file mode 100644 index 71ed5204b1..0000000000 --- a/erts/test/autoimport_SUITE.erl +++ /dev/null @@ -1,196 +0,0 @@ -%% -%% %CopyrightBegin% -%% -%% Copyright Ericsson AB 1998-2011. All Rights Reserved. -%% -%% The contents of this file are subject to the Erlang Public License, -%% Version 1.1, (the "License"); you may not use this file except in -%% compliance with the License. You should have received a copy of the -%% Erlang Public License along with this software. If not, it can be -%% retrieved online at http://www.erlang.org/. -%% -%% Software distributed under the License is distributed on an "AS IS" -%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See -%% the License for the specific language governing rights and limitations -%% under the License. -%% -%% %CopyrightEnd% -%% -%%% Purpose: Test erlang.xml re autoimports --module(autoimport_SUITE). - --include_lib("test_server/include/test_server.hrl"). --export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, - init_per_group/2,end_per_group/2, - init_per_testcase/2,end_per_testcase/2, - autoimports/1]). --define(TEST_TIMEOUT, ?t:seconds(180)). - -suite() -> [{ct_hooks,[ts_install_cth]}]. - -all() -> - [autoimports]. - -groups() -> - []. - -init_per_suite(Config) -> - Config. - -end_per_suite(_Config) -> - ok. - -init_per_group(_GroupName, Config) -> - Config. - -end_per_group(_GroupName, Config) -> - Config. - - -init_per_testcase(_Func, Config) -> - Dog = test_server:timetrap(?TEST_TIMEOUT), - [{watchdog, Dog} | Config]. - -end_per_testcase(_Func, Config) -> - Dog = ?config(watchdog, Config), - catch test_server:timetrap_cancel(Dog), - ok. - - -autoimports(suite) -> - []; -autoimports(doc) -> - ["Check that erlang.xml documents autoimports correctly"]; -autoimports(Config) when is_list(Config) -> - ?line XML = filename:join([?config(data_dir,Config),"erlang.xml"]), - ?line case xml(XML) of - [] -> - ok; - List -> - lists:foreach(fun({[],F,A}) -> - io:format("erlang:~s/~p is wrongly " - "documented as ~s/~p~n", - [F,A,F,A]); - ({"erlang",F,A}) -> - io:format("~s/~p is wrongly " - "documented as " - "erlang:~s/~p~n", - [F,A,F,A]) - end,List), - ?t:fail({wrong_autoimports,List}) - end. - -%% -%% Ugly chunk of code to heuristically analyze the erlang.xml -%% documentation file. Don't view this as an example... -%% - -xml(XMLFile) -> - {ok,File} = file:open(XMLFile,[read]), - xskip_to_funcs(file:read_line(File),File), - DocData = xloop(file:read_line(File),File), - true = DocData =/= [], - file:close(File), - analyze(DocData). - -%% Skip lines up to and including the <funcs> tag. -xskip_to_funcs({ok,Line},File) -> - case re:run(Line,"\\<funcs\\>",[{capture,none}]) of - nomatch -> - xskip_to_funcs(file:read_line(File),File); - match -> - ok - end. - -xloop({ok,Line},File) -> - case re:run(Line,"\\<name\\>",[{capture,none}]) of - nomatch -> - xloop(file:read_line(File),File); - match -> - X = re:replace(Line,"\\).*",")",[{return,list}]), - Y = re:replace(X,".*\\>","",[{return,list}]), - Mod = get_module(Y), - Rest1 = fstrip(Mod++":",Y), - Func = get_function(Rest1), - Rest2 = fstrip(Func++"(", Rest1), - Argc = count_args(Rest2,1,0,false), - [{Mod,Func,Argc} | - xloop(file:read_line(File),File)] - end; -xloop(_,_) -> - []. - -analyze([{[],Func,Arity}|T]) -> - case erl_internal:bif(list_to_atom(Func),Arity) of - true -> - analyze(T); - false -> - [{[],Func,Arity} | - analyze(T)] - end; -analyze([{"erlang",Func,Arity}|T]) -> - case erl_internal:bif(list_to_atom(Func),Arity) of - true -> - [{"erlang",Func,Arity}|analyze(T)]; - false -> - analyze(T) - end; -analyze([_|T]) -> - analyze(T); -analyze([]) -> - []. - - -count_args([],_,N,false) -> - N; -count_args([],_,N,true) -> - N+1; -count_args(_,0,N,true) -> - N+1; -count_args(_,0,N,false) -> - N; -count_args([Par|T],Level,N,Got) when (Par =:= 40) or - (Par =:= 123) or (Par =:= 91) -> - count_args(T,Level+1,N,(Level =:= 1) or Got); -count_args([41|T],1,N,true) -> - count_args(T,0,N+1,false); -count_args([Par|T],Level,N, Got) when (Par =:= 41) or - (Par =:= 125) or (Par =:= 93) -> - count_args(T,Level-1,N,Got); -count_args([$,|T],1,N,true) -> - count_args(T,1,N+1,false); -count_args([$ |T],A,B,C) -> - count_args(T,A,B,C); -count_args([_|T],1,N,_) -> - count_args(T,1,N,true); -count_args([_|T],A,B,C) -> - count_args(T,A,B,C). - -fstrip([],X) -> - X; -fstrip(_,[]) -> - []; -fstrip([H|T1],[H|T2]) -> - fstrip(T1,T2); -fstrip(_,L) -> - L. - -get_module(X) -> - get_module(X,[]). -get_module([],_) -> - []; -get_module([$:|_],Acc) -> - lists:reverse(Acc); -get_module([40|_],_) -> %( - []; -get_module([H|T],Acc) -> - get_module(T,[H|Acc]). - -get_function(X) -> - get_function(X,[]). -get_function([],_) -> - []; -get_function([40|_],Acc) -> %( - lists:reverse(Acc); -get_function([H|T],Acc) -> - get_function(T,[H|Acc]). diff --git a/erts/test/autoimport_SUITE_data/dummy.txt b/erts/test/autoimport_SUITE_data/dummy.txt deleted file mode 100644 index 972643e527..0000000000 --- a/erts/test/autoimport_SUITE_data/dummy.txt +++ /dev/null @@ -1,19 +0,0 @@ -%% -%% %CopyrightBegin% -%% -%% Copyright Ericsson AB 1998-2010. All Rights Reserved. -%% -%% The contents of this file are subject to the Erlang Public License, -%% Version 1.1, (the "License"); you may not use this file except in -%% compliance with the License. You should have received a copy of the -%% Erlang Public License along with this software. If not, it can be -%% retrieved online at http://www.erlang.org/. -%% -%% Software distributed under the License is distributed on an "AS IS" -%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See -%% the License for the specific language governing rights and limitations -%% under the License. -%% -%% %CopyrightEnd% -%% -%% Purpouse: Dummy diff --git a/erts/vsn.mk b/erts/vsn.mk index da0f03b24f..a420781e9f 100644 --- a/erts/vsn.mk +++ b/erts/vsn.mk @@ -17,8 +17,8 @@ # %CopyrightEnd% # -VSN = 5.9.2 -SYSTEM_VSN = R15B02 +VSN = 5.10 +SYSTEM_VSN = R16B # Port number 4365 in 4.2 # Port number 4366 in 4.3 |