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diff --git a/erts/doc/src/notes_history.xml b/erts/doc/src/notes_history.xml new file mode 100644 index 0000000000..cc3b938c86 --- /dev/null +++ b/erts/doc/src/notes_history.xml @@ -0,0 +1,503 @@ +<?xml version="1.0" encoding="latin1" ?> +<!DOCTYPE chapter SYSTEM "chapter.dtd"> + +<chapter> + <header> + <copyright> + <year>2006</year><year>2009</year> + <holder>Ericsson AB. All Rights Reserved.</holder> + </copyright> + <legalnotice> + 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. + + </legalnotice> + + <title>ERTS Release Notes History</title> + <prepared>otp_appnotes</prepared> + <docno>nil</docno> + <date>nil</date> + <rev>nil</rev> + <file>notes_history.xml</file> + </header> + + <section> + <title>ERTS 5.4</title> + + <section> + <title>Fixed Bugs and Malfunctions</title> + <list type="bulleted"> + <item> + <p>The BIF <c><![CDATA[is_record(Record,RecordTag)]]></c> has been added to + the run-time system. It checks that <c><![CDATA[Record]]></c> is a tuple + whose first element is the atom <c><![CDATA[RecordTag.]]></c> No check + is made of the size of the tuple (because the run-time + system doesn't know anything about records).</p> + <p>Note that normally the compiler translates calls to + <c><![CDATA[is_record/2]]></c> to code that also verify the size of the + tuple, in addition to verifying the first element. The + BIF version will be used <c><![CDATA[is_record/2]]></c> is applied or + if the second argument is not a literal atom (e.g. a + variable or another term type, in which case the BIF will + generate a <c><![CDATA[badarg]]></c> exception).</p> + <p>Own Id: OTP-4812</p> + </item> + <item> + <p>Guards of mach specifications are corrected to resemble + the semantics of guards in real code more closely. The + implementation now corresponds to the documentation in + ERTS User's Guide. The following things are corrected:</p> + <list type="bulleted"> + <item>Guard semantics was wrong when it came to logical + operators and exceptions. + <c><![CDATA[{'or',{'is_integer','$1'},{'or','$1','$1'}}]]></c> + evaluated to <c><![CDATA[true]]></c> with <c><![CDATA['$1']]></c> bound to an + integer.</item> + <item>Unary + and - was not implemented.</item> + <item>Calling operators as Bif's was not supported by + <c><![CDATA[ets/dbg:fun2ms]]></c> (<c><![CDATA[erlang:'or'(A,B)]]></c> etc).</item> + <item>Old typetests (like <c><![CDATA[integer(X)]]></c> instead of + <c><![CDATA[is_integer(X))]]></c> was not supported by + <c><![CDATA[ets/dbg:fun2ms]]></c>.</item> + <item>Semicolon (;) in guards was not supported by + <c><![CDATA[ets/dbg:fun2ms]]></c>.</item> + </list> + <p>*** POTENTIAL INCOMPATIBILITY ***</p> + <p>Own Id: OTP-4927</p> + </item> + <item> + <p>A potential initialization failure when using threads and + elib_malloc has been removed.</p> + <p>Own Id: OTP-5125</p> + </item> + <item> + <p>Several problems in the 64-bit emulator has been + corrected. For instance, the emulator could crash while + running the Debugger.</p> + <p>Own Id: OTP-5146</p> + </item> + <item> + <p>The match spec parse transform <c><![CDATA[ms_transform]]></c> no + longer accepts the <c><![CDATA[andalso]]></c> and <c><![CDATA[orelse]]></c> + constructs in guards for consistency with the standard + Erlang language. A future release of Erlang/OTP may allow + <c><![CDATA[andalso]]></c> and <c><![CDATA[orelse]]></c> in guards.</p> + <p>*** POTENTIAL INCOMPATIBILITY ***</p> + <p>Own Id: OTP-5149</p> + </item> + <item> + <p>In rare circumstances in a process that has caught + exceptions and uses funs, the process would be killed + when changing code because the code server would think + that the process still held references to the funs.</p> + <p>Own Id: OTP-5153</p> + </item> + <item> + <p><c><![CDATA[erlang:system_monitor/2]]></c> no longer sends any + monitoring messages to the system monitor process from + itself. This behavior is more consistent with other trace + functionality.</p> + <p>*** POTENTIAL INCOMPATIBILITY ***</p> + <p>Own Id: OTP-5183</p> + </item> + </list> + </section> + + <section> + <title>Improvements and New Features</title> + <list type="bulleted"> + <item> + <p>The documentation stated that <c><![CDATA[ets:safe_fixtable/2]]></c> + could return <c><![CDATA[true]]></c> or <c><![CDATA[false,]]></c> that was wrong, + it always returns <c><![CDATA[true]]></c>.</p> + <p>Own Id: OTP-4830</p> + </item> + <item> + <p>The unary '+' operator has been changed to throw an + <c><![CDATA[badarith]]></c> exception if its argument is not numeric (or + fail in a guard). It used its argument unchanged whatever + the type. Given the new meaning, unary '+' can now be + used to test whether a term is numeric.</p> + <p>*** POTENTIAL INCOMPATIBILITY ***</p> + <p>Own Id: OTP-4928</p> + </item> + <item> + <p>Process identifiers and port identifiers have been + made more unique. Previously 18 bits were used as id in + the internal representation of process and port + identifiers. Now 28 bits are used.</p> + <p>The maximum limit on the number of concurrently existing + processes due to the representation of pids has been + increased to 268435456 processes. The same is true for + ports. This limit will at least on a 32-bit architecture be + impossible to reach due to memory shortage.</p> + <p><em>NOTE:</em> By default, the <c><![CDATA[ERTS]]></c>, and the + <c><![CDATA[erl_interface]]></c>, <c><![CDATA[ei]]></c>, and <c><![CDATA[jinterface]]></c> + libraries are now only guaranteed to be compatible with + other Erlang/OTP components from the same release. It is + possible to set each component in compatibility mode of + an earlier release, though. See the documentation for + respective component on how to set it in compatibility + mode.</p> + <p>*** POTENTIAL INCOMPATIBILITY ***</p> + <p>Own Id: OTP-4968 Aux Id: OTP-4196 </p> + </item> + <item> + <p>A new internal thread library for the ERTS has been + added.</p> + <p>Own Id: OTP-5048</p> + </item> + <item> + <p>The system's performance could degrade severely if one + process held numerous links or monitors. The issue is + resolved.</p> + <p>Own Id: OTP-5079</p> + </item> + <item> + <p>A new function, <c><![CDATA[string:to_integer/1]]></c>, has been added.</p> + <p>Own Id: OTP-5081 Aux Id: OTP-5136 </p> + </item> + <item> + <p>A new function, <c><![CDATA[string:to_float/1]]></c>, has been added.</p> + <p>Own Id: OTP-5136 Aux Id: OTP-5081 </p> + </item> + <item> + <p>The exception code for calling a fun with wrong number of + arguments has been changed from simply <c><![CDATA[badarity]]></c> to + <c><![CDATA[{badarity,{Fun,Args}}]]></c>.</p> + <p>*** POTENTIAL INCOMPATIBILITY ***</p> + <p>Own Id: OTP-5139</p> + </item> + <item> + <p>The long-awaited <c><![CDATA[try]]></c>...<c><![CDATA[catch]]></c> construction + is included in this release. However, its use in + production code is not yet supported as there are several + known cases of legal code crashing the compiler. We plan + to release a patch to the compiler (including the + documentation) and at that time <c><![CDATA[try]]></c>...<c><![CDATA[catch]]></c> + will be supported.</p> + <p>Own Id: OTP-5150</p> + </item> + </list> + </section> + </section> + + <section> + <title>ERTS 5.3.6.6</title> + + <section> + <title>Fixed Bugs and Malfunctions</title> + <list type="bulleted"> + <item> + <p>A bug that caused an emulator crash when using system + monitor of long GC has been fixed.</p> + <p>Own Id: OTP-5123</p> + </item> + </list> + </section> + </section> + + <section> + <title>ERTS 5.3.6.5</title> + + <section> + <title>Fixed Bugs and Malfunctions</title> + <list type="bulleted"> + <item> + <p><c><![CDATA[erlang:memory(ets)]]></c> and <c><![CDATA[c:memory(ets)]]></c> + sometimes reported erroneous values. This bug has now been + fixed.</p> + <p>Own Id: OTP-5115 Aux Id: seq9063 </p> + </item> + <item> + <p>There is now a packet size limit option for <c><![CDATA[gen_tcp]]></c> + sockets. See the manual for <c><![CDATA[inet:setopts/2]]></c>.</p> + <p>The ASN.1 BER packet decoding for <c><![CDATA[gen_tcp]]></c> sockets + can now decode indefinite length packets.</p> + <p>Own Id: OTP-5128</p> + </item> + </list> + </section> + + <section> + <title>Improvements and New Features</title> + <list type="bulleted"> + <item> + <p>Port index was unnecessarily incremented by port table + size when port table got full. This unnecessary increment + has now been removed.</p> + <p>Own Id: OTP-5119</p> + </item> + </list> + </section> + </section> + + <section> + <title>ERTS 5.3.6.3</title> + + <section> + <title>Fixed Bugs and Malfunctions</title> + <list type="bulleted"> + <item> + <p>Resolved a build problem on Mac OS 10.3 ("Panther"). + Because of a conflict with the zlib sources included in + the Erlang run-time system and the zlib library included + in Panther, linking would fail.</p> + <p>Minor optimization on all Unix systems: caching the + system name returned from the uname() system call. + (Thanks to David N. Welton.)</p> + <p>Own Id: OTP-5069</p> + </item> + </list> + </section> + + <section> + <title>Improvements and New Features</title> + <list type="bulleted"> + <item> + <p>The ability to set system wide options for TCP sockets is + added through the kernel application variables + <c><![CDATA[inet_default_listen_options]]></c> and + <c><![CDATA[inet_default_connect_options]]></c>, see the <c><![CDATA[inet]]></c> + manual page for details.</p> + <p>Own Id: OTP-5080</p> + </item> + </list> + </section> + </section> + + <section> + <title>ERTS 5.3.6.2</title> + + <section> + <title>Fixed Bugs and Malfunctions</title> + <list type="bulleted"> + <item> + <p>A few portability enhancements for the R9C-1 Open Source + release: The installer for Windows can now be built with + NSIS 2.0 (as well as with the NSIS 2.0b3). The driver + header files updated to allowed drivers to be built which + the MinGW compiler on Windows. Minor portability + enhancement in <c><![CDATA[io_lib:fread]]></c>.</p> + <p>Own Id: OTP-4789</p> + </item> + <item> + <p>Conversion of extremely small floating point numbers in + the external format (distribution) could sometimes fail + leading to unexpected closing of distribution channels, + i.e. generating nodedowns for healthy nodes.</p> + <p>Own Id: OTP-5026 Aux Id: seq8631 EABln12478 </p> + </item> + </list> + </section> + </section> + + <section> + <title>ERTS 5.3.6.1</title> + + <section> + <title>Fixed Bugs and Malfunctions</title> + <list type="bulleted"> + <item> + <p>Conversion of extremely small floating point numbers in + the external format (distribution) could sometimes fail + leading to unexpected closing of distribution channels, + i.e. generating nodedowns for healthy nodes.</p> + <p>Own Id: OTP-5026 Aux Id: seq8631 EABln12478 </p> + </item> + </list> + </section> + + <section> + <title>Improvements and New Features</title> + <list type="bulleted"> + <item> + <p>Remote spawn on a nonreachable node now gives warning + instead of error in the error_log.</p> + <p>Own Id: OTP-5030 Aux Id: seq8663] </p> + </item> + </list> + </section> + + <section> + <title>Known Bugs and Problems</title> + <list type="bulleted"> + <item> + <p>Emulator with elib_malloc enabled could hang when many + I/O threads were in use.</p> + <p>Own Id: OTP-5028 Aux Id: EABln13041, EABln12253 </p> + </item> + </list> + </section> + </section> + + <section> + <title>ERTS 5.3.6</title> + + <section> + <title>Fixed Bugs and Malfunctions</title> + <list type="bulleted"> + <item> + <p>Distributed monitoring in combination with nodes + restarting did not behave correctly in rare + circumstances.</p> + <p>Own Id: OTP-4914</p> + </item> + <item> + <p>A module containing code similar to <c><![CDATA[receive after 4.1]]></c> + could not be loaded.</p> + <p>Own Id: OTP-4963 Aux Id: seq8344 </p> + </item> + <item> + <p>Problems fixed in <c><![CDATA[file:open/2]]></c>: <c><![CDATA["/dev/null"]]></c> + can now be opened. Opening a FIFO will now return an error + instead of hanging the emulator. The documentation has been + updated to point out that <c><![CDATA[file:open/2]]></c> returns + the error code <c><![CDATA[eisdir]]></c> when the pathname is not a + regular file (the pathname is not necessarily a directory).</p> + <p>Own Id: OTP-4992</p> + </item> + </list> + </section> + + <section> + <title>Improvements and New Features</title> + <list type="bulleted"> + <item> + <p>The Solaris kernel poll feature was changed from a + compile time option to a runtime option. The kernel poll + feature can be enabled, by passing the command-line + argument <c><![CDATA[+K true]]></c> to an emulator (see <c><![CDATA[erl(1)]]></c>) + that have kernel poll support, i.e. an emulator for + Solaris 8. By default the kernel poll feature is disabled.</p> + <p>Own Id: OTP-4979 Aux Id: seq8478 </p> + </item> + <item> + <p>Before the Erlang emulator writes an <c><![CDATA[erl_crash.dump]]></c> + file (for any reason), it will close all open files and + sockets.</p> + <p>Own Id: OTP-4985 Aux Id: EABln10730, EABln11277, + EABln11279 </p> + </item> + <item> + <p>The <c><![CDATA[+c]]></c> switch has been added to disable time + correction in the runtime system, this should be used on + systems where one is certain no dramatic wall clock time + changes will occur and the time correction algorithm is too + costly (namely very fast Linux systems where loads of + <c><![CDATA[erlang:now()]]></c> are executed).</p> + <p>Own Id: OTP-4986</p> + </item> + <item> + <p>The <c><![CDATA[process_flag/2,3]]></c> BIFs now take a flag + <c><![CDATA[min_heap_size]]></c> that allows changing an existing + process's minimum heap size. The actual size will only be + changed when the next garbage collection occurs.</p> + <p>Own Id: OTP-4991 Aux Id: seq8515, OTP-4987 </p> + </item> + </list> + </section> + </section> + + <section> + <title>ERTS 5.3.4</title> + + <section> + <title>Improvements and New Features</title> + <list type="bulleted"> + <item> + <p>A possibility to make distribution messages be qued up + during running of erlang code, so that larger packages is + sent over the network is added.</p> + <p>Own Id: OTP-4916</p> + </item> + <item> + <p>When code loading failed it was impossible to know + exactly what caused it, only <c><![CDATA[{undef,[{M,F,A}|...]}]]></c> + would be reported. Now the primitive loader lets the + error logger print an error report if a file operation + fails. All file errors except <c><![CDATA[enoent]]></c> and + <c><![CDATA[enotdir]]></c> are reported this way.</p> + <p>Own Id: OTP-4925 Aux Id: OTP-4952 </p> + </item> + </list> + </section> + </section> + + <section> + <title>ERTS 5.3.3</title> + + <section> + <title>Fixed Bugs and Malfunctions</title> + <list type="bulleted"> + <item> + <p>The driver for dynamically linked in drivers has been + fixed to delete loaded drivers when its Erlang server + dies. The Erlang server has also been updated to improve + the start-on-demand behaviour.</p> + <p>Own Id: OTP-4876 Aux Id: OTP-4855 seq8272 </p> + </item> + <item> + <p><c><![CDATA[erlang:register/2]]></c> does no longer generate an ERROR + REPORT to the error logger when the name already is + registered. If the name is already registered the process + function will crash with <c><![CDATA[{'EXIT',Reason}]]></c> and that is + enough. It is up to the caller to decide if it is an + error that the name is already registered.</p> + <p>Own Id: OTP-4892</p> + </item> + <item> + <p>When using <c><![CDATA[erlang:system_monitor(Pid,{long_gc,Time})]]></c>, + and the GC time exceeded 1 second, it sometimes erroneously + showed up as about 4300 seconds. This bug has now been + corrected.</p> + <p>Own Id: OTP-4903 Aux Id: seq8379 </p> + </item> + </list> + </section> + + <section> + <title>Improvements and New Features</title> + <list type="bulleted"> + <item> + <p>Starting Erlang with the <c><![CDATA[+Bi]]></c> flag (to ignore ^C), now + also disables the quit ('q') option in the JCL menu.</p> + <p>Own Id: OTP-4897</p> + </item> + </list> + </section> + </section> + + <section> + <title>ERTS 5.3.2</title> + + <section> + <title>Improvements and New Features</title> + <list type="bulleted"> + <item> + <p>The elib_malloc alternative dynamic memory allocator has + been improved to use an address order best fit strategy. + The instrumented emulator has been improved to be able to + catch memory allocations done by external libraries. The + emulator flag <c><![CDATA[+r]]></c> (stands for "relocate") makes + <c><![CDATA[ets]]></c> updates always result in an object relocation, + which significantly lessens the memory fragmentation in + certain systems. The <c><![CDATA[erlang:system_info/1]]></c> bif can + now be called with the argument <c><![CDATA[ets_realloc_moves]]></c> + and will return <c><![CDATA[true]]></c> if the <c><![CDATA[+r]]></c> emulator flag + is in effect, <c><![CDATA[false]]></c> otherwise.</p> + <p>Own Id: OTP-4838 Aux Id: seq8156 </p> + </item> + </list> + </section> + </section> +</chapter> + |