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authorPatrik Nyblom <[email protected]>2012-03-22 18:29:34 +0100
committerPatrik Nyblom <[email protected]>2012-03-22 18:30:07 +0100
commit5957a8338fe1f4e79a39277174094bbd9e978896 (patch)
tree4abcf47850e2a577b401a61bb1693d85cb137ffe /erts/preloaded/src/prim_file.erl
parentb5f6596f49db47e6dacddb2b10292a7294e13993 (diff)
parent1e653c3539423e4cfdeab1d232483bcac0e8b073 (diff)
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Merge branch 'pan/dtrace' into maint
* pan/dtrace: (22 commits) Use distinct function-entry probes for local and global calls Correct calculation of stack depth in call/return probes Add probes for all kind of calls Don't try to "clean up" generated fun names erl_process.c: Fix probe for process exit Remove code causing dialyzer warning from prim_file Add documentation for dyntrace and system_info changes Update slogan and add system_info for dynamic trace Update README's for dtrace and systemtap Rename dyntrace BIFs to more suiting names If VM probes are not enabled, short-circuit calls to probe BIFs beam_makeops: Add a simple preprocessor Ifdef all dynamic trace code Move dtrace erlang code and NIF into runtime_tools Correct some errors in the user tag spreading Change to more specific configure options for dtrace Add user tag spreading functionality to VM and use in file Update dtrace for changes in R15 Add DTrace support for OS X, Solaris, and Linux (via SystemTap), 4/4 Add DTrace support for OS X, Solaris, and Linux (via SystemTap), 3/4 ... OTP-10017
Diffstat (limited to 'erts/preloaded/src/prim_file.erl')
-rw-r--r--erts/preloaded/src/prim_file.erl58
1 files changed, 41 insertions, 17 deletions
diff --git a/erts/preloaded/src/prim_file.erl b/erts/preloaded/src/prim_file.erl
index 36cbe329e8..0ecb720726 100644
--- a/erts/preloaded/src/prim_file.erl
+++ b/erts/preloaded/src/prim_file.erl
@@ -268,7 +268,7 @@ advise(#file_descriptor{module = ?MODULE, data = {Port, _}},
%% Returns {error, Reason} | ok.
write(#file_descriptor{module = ?MODULE, data = {Port, _}}, Bytes) ->
- case drv_command(Port, [?FILE_WRITE,Bytes]) of
+ case drv_command_nt(Port, [?FILE_WRITE,erlang:dt_prepend_vm_tag_data(Bytes)],undefined) of
{ok, _Size} ->
ok;
Error ->
@@ -283,8 +283,8 @@ pwrite(#file_descriptor{module = ?MODULE, data = {Port, _}}, L)
pwrite_int(_, [], 0, [], []) ->
ok;
pwrite_int(Port, [], N, Spec, Data) ->
- Header = list_to_binary([<<?FILE_PWRITEV, N:32>> | reverse(Spec)]),
- case drv_command_raw(Port, [Header | reverse(Data)]) of
+ Header = list_to_binary([?FILE_PWRITEV, erlang:dt_prepend_vm_tag_data(<<N:32>>) | reverse(Spec)]),
+ case drv_command_nt(Port, [Header | reverse(Data)], undefined) of
{ok, _Size} ->
ok;
Error ->
@@ -402,7 +402,7 @@ pread(#file_descriptor{module = ?MODULE, data = {Port, _}}, L)
pread_int(_, [], 0, []) ->
{ok, []};
pread_int(Port, [], N, Spec) ->
- drv_command(Port, [<<?FILE_PREADV, 0:32, N:32>> | reverse(Spec)]);
+ drv_command_nt(Port, [?FILE_PREADV, erlang:dt_prepend_vm_tag_data(<<0:32, N:32>>) | reverse(Spec)],undefined);
pread_int(Port, [{Offs, Size} | T], N, Spec)
when is_integer(Offs), is_integer(Size), 0 =< Size ->
if
@@ -423,9 +423,9 @@ pread(#file_descriptor{module = ?MODULE, data = {Port, _}}, Offs, Size)
if
-(?LARGEFILESIZE) =< Offs, Offs < ?LARGEFILESIZE,
Size < ?LARGEFILESIZE ->
- case drv_command(Port,
- <<?FILE_PREADV, 0:32, 1:32,
- Offs:64/signed, Size:64>>) of
+ case drv_command_nt(Port,
+ [?FILE_PREADV, erlang:dt_prepend_vm_tag_data(<<0:32, 1:32,
+ Offs:64/signed, Size:64>>)], undefined) of
{ok, [eof]} ->
eof;
{ok, [Data]} ->
@@ -923,12 +923,17 @@ drv_open(Driver, Portopts) ->
%% Closes a port in a safe way. Returns ok.
drv_close(Port) ->
- try erlang:port_close(Port) catch error:_ -> ok end,
- receive %% Ugly workaround in case the caller==owner traps exits
- {'EXIT', Port, _Reason} ->
- ok
- after 0 ->
- ok
+ Save = erlang:dt_spread_tag(false),
+ try
+ try erlang:port_close(Port) catch error:_ -> ok end,
+ receive %% Ugly workaround in case the caller==owner traps exits
+ {'EXIT', Port, _Reason} ->
+ ok
+ after 0 ->
+ ok
+ end
+ after
+ erlang:dt_restore_tag(Save)
end.
@@ -938,9 +943,6 @@ drv_close(Port) ->
%% then closed after the result has been received.
%% Returns {ok, Result} or {error, Reason}.
-drv_command_raw(Port, Command) ->
- drv_command(Port, Command, false, undefined).
-
drv_command(Port, Command) ->
drv_command(Port, Command, undefined).
@@ -956,7 +958,8 @@ drv_command(Port, Command, R) ->
end.
drv_command(Port, Command, Validated, R) when is_port(Port) ->
- try erlang:port_command(Port, Command) of
+ Save = erlang:dt_spread_tag(false),
+ try erlang:port_command(Port, erlang:dt_append_vm_tag_data(Command)) of
true ->
drv_get_response(Port, R)
catch
@@ -975,6 +978,8 @@ drv_command(Port, Command, Validated, R) when is_port(Port) ->
end;
error:Reason ->
{error, Reason}
+ after
+ erlang:dt_restore_tag(Save)
end;
drv_command({Driver, Portopts}, Command, Validated, R) ->
case drv_open(Driver, Portopts) of
@@ -985,6 +990,25 @@ drv_command({Driver, Portopts}, Command, Validated, R) ->
Error ->
Error
end.
+drv_command_nt(Port, Command, R) when is_port(Port) ->
+ Save = erlang:dt_spread_tag(false),
+ try erlang:port_command(Port, Command) of
+ true ->
+ drv_get_response(Port, R)
+ catch
+ error:badarg ->
+ try erlang:iolist_size(Command) of
+ _ -> % Valid
+ {error, einval}
+ catch
+ error:_ ->
+ {error, badarg}
+ end;
+ error:Reason ->
+ {error, Reason}
+ after
+ erlang:dt_restore_tag(Save)
+ end.