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diff --git a/erts/doc/src/notes.xml b/erts/doc/src/notes.xml index ed0946d6ba..3c49853119 100644 --- a/erts/doc/src/notes.xml +++ b/erts/doc/src/notes.xml @@ -31,6 +31,1185 @@ </header> <p>This document describes the changes made to the ERTS application.</p> +<section><title>Erts 10.3.5.3</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + If you set <c>{linger,{true,0}}</c> on a <c>gen_tcp</c> + listen socket, accept a connection on that socket, and + then close the accepted socket, now the linger zero + setting is transferred to the accepted socket. Before + this correction that information was lost and the close + behaviour on the accepted socket incorrect.</p> + <p> + Own Id: OTP-15370 Aux Id: ERIERL-353 </p> + </item> + <item> + <p> + Fixed <c>process_info(Pid,reductions)</c> to not + categorically increase reduction count of the measured + process <c>Pid</c>. Repeated reduction measure of an idle + process will most often (but not guaranteed) return the + same value, like it behaved before OTP 21.3.8.</p> + <p> + Own Id: OTP-15865 Aux Id: ERL-964 </p> + </item> + <item> + <p> + The runtime system disconnected a connection if it + received an <c>exit/2</c> signal where the recipient was + a process on an old incarnation of the current node. That + is, the receiving node had the same node name, but + another "creation" number. The signal will now just be + dropped since the receiving process no longer exists.</p> + <p> + Own Id: OTP-15867 Aux Id: ERIERL-373 </p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + The possibility to send ancillary data, in particular the + TOS field, has been added to <c>gen_udp:send/4,5</c>.</p> + <p> + Own Id: OTP-15747 Aux Id: ERIERL-294 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.3.5.2</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>In nested use of <c>try</c>/<c>catch</c>, rethrowing + an exception using <c>erlang:raise/3</c> with a different + class would not always be able to change the class of the + exception.</p> + <p> + Own Id: OTP-15834 Aux Id: ERIERL-367 </p> + </item> + <item> + <p> + Fixed bug in <c>seq_trace:set_token(label,Term)</c> which + could cause VM crash if <c>Term</c> was heap allocated + (not an atom, small integer, local pid or port). Bug + exists since OTP 21.0 when terms other than small + integers were first allowed as labels.</p> + <p> + Own Id: OTP-15849 Aux Id: ERL-700 </p> + </item> + <item> + <p> + Fix <c>seq_trace:print/2</c> not to raise <c>badarg</c> + exception if label is not a small integer. Bug exists + since OTP 21.0.</p> + <p> + Own Id: OTP-15859 Aux Id: ERL-700 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.3.5.1</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Fixed a buffer overflow when + <c>binary_to_existing_atom/2</c> and + <c>list_to_existing_atom/2</c> was used with the + <c>latin1</c> encoding.</p> + <p> + Own Id: OTP-15819 Aux Id: ERL-944 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.3.5</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fixed more bugs in <c>process_info(reductions)</c> + causing it to sometimes behave non-monotonic. That is, a + subsequent call toward the same process could return a + lower reduction value.</p> + <p> + Own Id: OTP-15793 Aux Id: ERIERL-337, OTP-15709 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.3.4</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Add missing documentation of new external tags + <c>NEW_PID</c>, <c>NEW_PORT</c> and + <c>NEWER_REFERENCE</c> introduced in OTP 19.</p> <p>These + new tags are planned to be "activated" in OTP 23 when + distribution capability flag <c>DFLAG_BIG_CREATION</c> + becomes mandatory. Older nodes (>= 19) are able to decode + these new tags and send them back to the new node. Nodes + older than OTP 23 will however never encode their own + local pids, ports and references using the new tags.</p> + <p> + Own Id: OTP-15766</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.3.3</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fix <c>erlang:open_port/2</c> with the <c>fd</c> option + to correctly cleanup the pollset when the port is closed. + Before this fix there would be error printouts sent to + logger when the same fd was reused in a new port.</p> + <p> + Own Id: OTP-15753 Aux Id: ERL-900 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.3.2</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Fixed a bug in <c>seq_trace:reset_trace/0</c> that + could crash the emulator.</p> + <p> + Own Id: OTP-15704</p> + </item> + <item> + <p> + Fixed bug in <c>process_info(reductions)</c> causing it + to sometimes return invalid results.</p> + <p> + Own Id: OTP-15709 Aux Id: ERIERL-337 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.3.1</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>If a suspend/resume signal pair was sent to a process + while it was executing dirty, the receiving process could + later end up in a suspended state indefinitely. This bug + was introduced in ERTS version 10.0 (OTP 21.0).</p> + <p>Suspend/resume signals are sent from <seealso + marker="erts:erlang#suspend_process/1"><c>erlang:suspend_process()</c></seealso>/<seealso + marker="erts:erlang#resume_process/1"><c>erlang:resume_process()</c></seealso>. + The <seealso + marker="runtime_tools:dbg"><c>dbg</c></seealso> trace + tool utilize this functionality and could thus trigger + this bug.</p> + <p> + Own Id: OTP-15688</p> + </item> + <item> + <p> + Fix a possible deadlock when terminating the ERTS caused + by a dirty scheduler not releasing it's run-queue lock + when terminating.</p> + <p> + Own Id: OTP-15690 Aux Id: PR-2172 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.3</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>When multiplying a number by itself, a word beyond the + number on the heap could be read (and ignored). This bug + was extremely unlikely to actually cause a real + problem.</p> + <p> + Own Id: OTP-15484</p> + </item> + <item> + <p> + Fix bug where doing <c>seq_trace:reset_trace()</c> while + another process was doing a garbage collection could + cause the run-time system to segfault.</p> + <p> + Own Id: OTP-15490</p> + </item> + <item> + <p> + Fix reading of ancillary data from packet oriented + sockets on old Linux kernel versions. Without this fix, + getting the data would cause the port to enter an + infinite loop.</p> + <p> + Own Id: OTP-15494</p> + </item> + <item> + <p> + Fix bug where crash dumping or doing + <c>erlang:system_info(procs)</c> while another process + was doing a garbage collection could cause the run-time + system to segfault.</p> + <p> + Own Id: OTP-15527</p> + </item> + <item> + <p> + Fix <c>erlang:system_info(kernel_poll)</c> to return + correct value. Before this fix, the call always returned + <c>false</c>.</p> + <p> + Own Id: OTP-15556</p> + </item> + <item> + <p> + Fix bug in <c>enif_make_map_from_arrays</c> that would + produce broken maps when number of keys were 32. Bug + exists since OTP 21.0.</p> + <p> + Own Id: OTP-15567</p> + </item> + <item> + <p> + Fix a bug in <c>binary:encode_unsigned</c> that may cause + a read of uninitialized memory.</p> + <p> + The bug existed since the function was added (OTP + R16B02).</p> + <p> + Own Id: OTP-15583 Aux Id: PR-2118 </p> + </item> + <item> + <p> + Fixed a bug that could cause <c>heart</c> to kill an + exiting node before it had time to flush all buffered + writes. If environment variable + <c>HEART_KILL_SIGNAL=SIGABRT</c> was set a superfluous + core dump could also be generated.</p> + <p> + Own Id: OTP-15599 Aux Id: ERIERL-298 </p> + </item> + <item> + <p> + Fix <c>enif_consume_timeslice</c> to be a no-op on dirty + scheduler and not crash debug compiled emulator.</p> + <p> + Own Id: OTP-15604</p> + </item> + <item> + <p> + Fixed macro redefinition warnings.</p> + <p> + Own Id: OTP-15629</p> + </item> + <item> + <p> + <c>to_erl</c> fixed to not garble terminal input beyond + 7-bit ASCII.</p> + <p> + Own Id: OTP-15650 Aux Id: ERL-854, PR-2161 </p> + </item> + <item> + <p> + Minor fixes for <c>make clean</c>.</p> + <p> + Own Id: OTP-15657</p> + </item> + <item> + <p> + Fixed a bug in all <c>ets:select*</c> and + <c>ets:match*</c> functions that could in some rare cases + lead to very poor performance.</p> + <p> + Own Id: OTP-15660 Aux Id: ERL-869 </p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + Add <c>erlang:system_flag(system_logger, Pid)</c> and + <c>erlang:system_info(system_logger)</c>. This + system_flag can be used to set the process that will + receive the logging messages generated by ERTS.</p> + <p> + Own Id: OTP-15375</p> + </item> + <item> + <p><c>integer_to_list/2</c> and + <c>integer_to_binary/2</c> are now implemented in C, + improving their performance.</p> + <p> + Own Id: OTP-15503 Aux Id: PR-2052 </p> + </item> + <item> + <p> + Improved <c>term_to_binary</c> to do more fair reduction + count and yielding when encoding large byte lists + (strings).</p> + <p> + Own Id: OTP-15514 Aux Id: ERL-774 </p> + </item> + <item> + <p> + Made internal port drivers more robust against + <c>erlang:port_control</c> with invalid arguments and + added documentation warnings about such abuse.</p> + <p> + Own Id: OTP-15555 Aux Id: ERIERL-231 </p> + </item> + <item> + <p> + Fix bug on NetBSD where the <c>exit_status</c> from a + port program would never be sent.</p> + <p> + Own Id: OTP-15558 Aux Id: ERL-725 </p> + </item> + <item> + <p>There is a new function <c>persistent:term(Key, + Default)</c> to allow specifying a default when looking + up a persistent term.</p> + <p> + Own Id: OTP-15576 Aux Id: ERL-843 </p> + </item> + <item> + <p>A transitory emulator option '<c>+ztma true</c>' has + been added to allow running existing BEAM code that + relies on "tuple calls" (dispatch on parameterized + modules) which has been compiled under OTP 20 or earlier. + This option will be removed in OTP 22, so such modules + should eventually be recompiled with the + <c>+tuple_calls</c> option.</p> + <p> + Own Id: OTP-15580 Aux Id: PR-2113 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.2.5</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Fixes of install/release phase in build system.</p> + <list> <item>The source tree was modified when + installing/releasing and/or applying a patch.</item> + <item>Some files were installed with wrong access + rights.</item> <item>If applying a patch (using + <c>otp_patch_apply</c>) as another user (except root) + than the user that built the source, the documentation + was not properly updated.</item> </list> + <p> + Own Id: OTP-15551</p> + </item> + <item> + <p> + Setting the <c>recbuf</c> size of an inet socket the + <c>buffer</c> is also automatically increased. Fix a bug + where the auto adjustment of inet buffer size would be + triggered even if an explicit inet buffer size had + already been set.</p> + <p> + Own Id: OTP-15651 Aux Id: ERIERL-304 </p> + </item> + <item> + <p> + Reading from UDP using active <c>true</c> or active + <c>N</c> mode has been optimized when more packets than + specified by <c>read_packets</c> are available on the + socket.</p> + <p> + Own Id: OTP-15652 Aux Id: ERIERL-304 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.2.4</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + When using the <c>{linger,{true,T}}</c> option; + <c>gen_tcp:listen/2</c> used the full linger time before + returning for example <c>eaddrinuse</c>. This bug has now + been corrected.</p> + <p> + Own Id: OTP-14728 Aux Id: ERIERL-303 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.2.3</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fix bug where doing a <c>gen_tcp:send</c> on a socket + with <c>delay_send</c> set to true could cause a segfault + if the other side closes the connection.</p> + <p> + Bug was introduced in erts-10.2 (OTP-21.2).</p> + <p> + Own Id: OTP-15536 Aux Id: ERL-827 </p> + </item> + <item> + <p> + Fix a race condition when a port program closes that + could result in the next started port to hang during + startup.</p> + <p> + When this fault happens the following error is normally + (but not always) logged:</p> + <p> + <c> =ERROR REPORT==== 14-Jan-2019::10:45:52.868246 + ===</c><br/><c> Bad input fd in erts_poll()! fd=11, + port=#Port<0.505>, driver=spawn, name=/bin/sh -s + unix:cmd </c></p> + <p> + Bug was introduced in erts-10.0 (OTP-21.0).</p> + <p> + Own Id: OTP-15537</p> + </item> + <item> + <p> + Fix a bug where polling for external events could be + delayed for a very long time if all active schedulers + were 100% loaded.</p> + <p> + Bug was introduced in erts-10.2 (OTP-21.2).</p> + <p> + Own Id: OTP-15538 Aux Id: ERIERL-229 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.2.2</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Fixed a crash when dangling files were closed after + <c>init:restart/0</c>.</p> + <p> + Own Id: OTP-15495 Aux Id: ERL-821 </p> + </item> + <item> + <p> + A bug that could cause dirty schedulers to become + unresponsive has been fixed.</p> + <p> + Own Id: OTP-15509 Aux Id: PR-2027, PR-2093 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.2.1</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fixed bug on big endian architectures when changing file + permissions or ownership with <c>file:change_mode</c>, + <c>change_owner</c>, <c>change_group</c> or + <c>write_file_info</c>. Bug exists since OTP-21.0.</p> + <p> + Own Id: OTP-15485</p> + </item> + <item> + <p> + Fixed bug in <c>atomics</c> with option + <c>{signed,false}</c> when returned values are <c>(1 bsl + 63)</c> or larger. Could cause heap corruption leading to + VM crash or other unpleasant symptoms. Bug exists since + OTP-21.2 when module <c>atomics</c> was introduced.</p> + <p> + Own Id: OTP-15486 Aux Id: PR-2061 </p> + </item> + <item> + <p> + Fixed bug in operator <c>band</c> of two negative + operands causing erroneous result if the absolute value + of one of the operands have the lowest <c>N*W</c> bits as + zero and the other absolute value is not larger than + <c>N*W</c> bits. <c>N</c> is an integer of 1 or larger + and <c>W</c> is 32 or 64 depending on word size.</p> + <p> + Own Id: OTP-15487 Aux Id: ERL-804 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.2</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + When a process was waiting for a TCP socket send + operation to complete, and another process closed the + socket during that send, the sending process could hang. + This bug has now been corrected.</p> + <p> + Own Id: OTP-12242 Aux Id: ERL-561 </p> + </item> + <item> + <p> + Document <c>bit_size</c> in match specifications and + allow it in <c>ets:fun2ms</c>.</p> + <p> + Own Id: OTP-15343 Aux Id: PR-1962 </p> + </item> + <item> + <p> + Fixed bug in <c>ets:select_replace</c> when called with a + fully bound key could cause a following call to + <c>ets:next</c> or <c>ets:prev</c> to crash the emulator + or return invalid result.</p> + <p> + Own Id: OTP-15346</p> + </item> + <item> + <p>When a module has been purged from memory, any + literals belonging to that module will be copied to all + processes that hold references to them. The max heap size + limit would be ignored in the garbage collection + initiated when copying literals to a process. If the max + heap size was exceeded, the process would typically be + terminated in the following garbage collection. Corrected + to terminate the process directly if copying a literal + would exceed the max heap size.</p> + <p> + Own Id: OTP-15360</p> + </item> + <item> + <p> + Fix compilation of run_erl on Solaris 11.4 and later.</p> + <p> + Own Id: OTP-15389</p> + </item> + <item> + <p>Fixed a bug where <c>lists:reverse/1-2</c> could use + far too many reductions. This bug was introduced in + <c>OTP 21.1</c>.</p> + <p> + Own Id: OTP-15436</p> + </item> + <item> + <p>Fixed a bug where a dirty scheduler could stay awake + forever if a distribution entry was removed as part of a + dirty GC.</p> + <p> + Own Id: OTP-15446 Aux Id: PR-2024 </p> + </item> + <item> + <p> + Fix microstate accounting handing in various places. Most + importantly the GC states when the GC is run on a dirty + scheduler are now managed correctly.</p> + <p> + Own Id: OTP-15450 Aux Id: ERIERL-229 </p> + </item> + <item> + <p> + Fixed bug in <c>file:sendfile</c> when the send operation + failed. For sockets in <c>active</c> modes it could cause + emulator crash or a hanging call. For sockets with + <c>{active,false}</c> an unexpected <c>{inet_reply, _, + _}</c> message could be sent to the calling process. The + bug exists since OTP-21.0.</p> + <p> + Own Id: OTP-15461 Aux Id: ERL-784 </p> + </item> + <item> + <p> + The erts configure script has been updated to reject any + CFLAGS that does not have <c>-O</c>. This in order to + prevent the common mistake of forgetting to add + <c>-O2</c> to custom CFLAGS.</p> + <p> + Own Id: OTP-15465</p> + </item> + <item> + <p> + Fix reduction count in lists:member/2</p> + <p> + Own Id: OTP-15474 Aux Id: ERIERL-229 </p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + New <c>counters</c> and <c>atomics</c> modules supplies + access to highly efficient operations on mutable fixed + word sized variables.</p> + <p> + Own Id: OTP-13468</p> + </item> + <item> + <p>There is a new module <c>persistent_term</c> that + implements a term storage suitable for terms that are + frequently used but never or infrequently updated. + Lookups are done in constant time without copying the + terms.</p> + <p> + Own Id: OTP-14669 Aux Id: PR-1989 </p> + </item> + <item> + <p> + A function <c>inet:getifaddrs/1</c> that takes a list + with a namespace option has been added, for platforms + that support that feature, for example Linux (only?).</p> + <p> + Own Id: OTP-15121 Aux Id: ERIERL-189, PR-1974 </p> + </item> + <item> + <p>Added the <c>nopush</c> option for TCP sockets, which + corresponds to <c>TCP_NOPUSH</c> on *BSD and + <c>TCP_CORK</c> on Linux.</p> + <p>This is also used internally in <c>file:sendfile</c> + to reduce latency on subsequent send operations.</p> + <p> + Own Id: OTP-15357 Aux Id: ERL-698 </p> + </item> + <item> + <p>List subtraction (The <c>--</c> operator) will now + yield properly on large inputs.</p> + <p> + Own Id: OTP-15371</p> + </item> + <item> + <p> + Optimize handling of send_delay for tcp sockes to better + work with the new pollthread implementation introduced in + OTP-21.</p> + <p> + Own Id: OTP-15471 Aux Id: ERIERL-229 </p> + </item> + <item> + <p> + Optimize driver_set_timer with a zero timeout to + short-circuit and not create any timer structure, but + instead schedule the timer immediately.</p> + <p> + Own Id: OTP-15472 Aux Id: ERIERL-229 </p> + </item> + <item> + <p> + Add <c>erl_xcomp_code_model_small</c> as a cross + configure variable in order to let the emulator be build + with the assumption that a small code model will be used + on the target machine.</p> + <p> + Own Id: OTP-15473 Aux Id: ERIERL-229 </p> + </item> + <item> + <p> + Add a new pollset that is made to handle sockets that use + <c>{active, true}</c> or <c>{active, N}</c>. The new + pollset will not be polled by a pollthread, but instead + polled by a normal scheduler.</p> + <p> + This change was made because of the overhead associated + with constantly having to re-apply the ONESHOT mechanism + on fds that all input events were interesting.</p> + <p> + The new pollset is only active on platforms that support + concurrent kernel poll updates, i.e. Linux and BSD.</p> + <p> + Own Id: OTP-15475 Aux Id: ERIERL-229 </p> + </item> + <item> + <p> + Fix bug where emulator would segfault if a literal + message was sent when sequence tracing was enabled.</p> + <p> + Own Id: OTP-15478 Aux Id: ERL-741 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.1.3</title> + + <section><title>Improvements and New Features</title> + <list> + <item> + <p>Added an optional <c>./configure</c> flag to compile + the emulator with spectre mitigation: + <c>--with-spectre-mitigation</c></p> + <p>Note that this requires a recent version of GCC with + support for spectre mitigation and the + <c>--mindirect-branch=thunk</c> flag, such as + <c>8.1</c>.</p> + <p> + Own Id: OTP-15430 Aux Id: ERIERL-237 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.1.2</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Fixed a rare bug where files could be closed on a + normal instead of an IO scheduler, resulting in system + instability if the operation blocked.</p> + <p> + Own Id: OTP-15421</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.1.1</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + A bug where the socket option 'pktoptions' caused a read + of uninitialized memory has been fixed. Would cause + malfunction on FreeBSD.</p> + <p> + Own Id: OTP-14297 Aux Id: OTP-15141 </p> + </item> + <item> + <p>Fixed a memory leak on errors when reading files.</p> + <p> + Own Id: OTP-15318</p> + </item> + <item> + <p>File access through UNC paths works again on Windows. + This regression was introduced in OTP 21.</p> + <p> + Own Id: OTP-15333 Aux Id: ERL-737 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.1</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fix the seq_trace token to not be cleared when a process + receives messages sent by erts. Some examples of when + this could happen is all port BIFs, i.e. + <c>open_port</c>, <c>port_command</c> etc etc.</p> + <p> + Fix so that messages sent by nifs can be traced using + normal and <c>seq_trace</c> tracing.</p> + <p> + Own Id: OTP-15038 Aux Id: ERL-602 </p> + </item> + <item> + <p> + Fixed specs and documentation for <c>process_info</c> + item <c>monitored_by</c> to include port identifiers and + nif resources as possible types.</p> + <p> + Own Id: OTP-15180 Aux Id: ERL-648 </p> + </item> + <item> + <p> + Fix bug in generation of erl_crash.dump, which could + cause VM to crash.</p> + <p> + Bug exist since erts-9.2 (OTP-20.2).</p> + <p> + Own Id: OTP-15181</p> + </item> + <item> + <p> + Fix bug where ctrl-break or ctrl-c would not trigger the + break mode properly on Windows. This bug was introduced + in erts-10.0 (OTP-21).</p> + <p> + Own Id: OTP-15205</p> + </item> + <item> + <p> + Fix a performance bug for reception of UDP packages, + where a memory buffer would be reallocated when it should + not have been.</p> + <p> + Introduce a limit on the maximum automatic increase of + the UDP user-space buffer to the theoretical max of the + network PATH, i.e. 65535.</p> + <p> + Own Id: OTP-15206</p> + </item> + <item> + <p> + Fix alignment of erts allocator state internally in erts. + With the improper alignment the emulator would refuse to + start when compiled with clang on 32-bit systems.</p> + <p> + Own Id: OTP-15208 Aux Id: PR-1897 ERL-677 </p> + </item> + <item> + <p> + Fix bug where too many concurrent calls to + <c>erlang:open_port({spawn,"cmd"},...)</c> would result + in the emulator terminating with the reason "Failed to + write to erl_child_setup: ". After this fix the + <c>open_port</c> call will throw an <c>emfile</c> + exception instead.</p> + <p> + Own Id: OTP-15210</p> + </item> + <item> + <p> + Upgraded the ERTS internal PCRE library from version 8.41 + to version 8.42. See <url + href="http://pcre.org/original/changelog.txt">http://pcre.org/original/changelog.txt</url> + for information about changes made to PCRE. This library + implements major parts of the <seealso + marker="stdlib:re"><c>re</c></seealso> regular + expressions module.</p> + <p> + Own Id: OTP-15217</p> + </item> + <item> + <p> + Fix <c>open_port({fd,X,Y}, ...)</c> to release the file + descriptors from the pollset when closing the port. + Without this fix the same file descriptor number could + not be reused when doing multiple open_port and + port_close sequences.</p> + <p> + Own Id: OTP-15236 Aux Id: ERL-692 </p> + </item> + <item> + <p> + Fixed bug in <c>float_to_list/2</c> and + <c>float_to_binary/2</c> with options + <c>[{decimals,0},compact]</c> causing totally wrong + results. Bug exists since OTP-21.0.</p> + <p> + Own Id: OTP-15276 Aux Id: PR-1920 </p> + </item> + <item> + <p> + Fixed bug in <c>erlang:memory</c> causing <c>ets</c> to + report too much. This small false memory leak (16 bytes + each time) can only happen when a specific race condition + occurs between scheduler threads on a table with option + <c>write_concurrency</c>.</p> + <p> + Own Id: OTP-15278</p> + </item> + <item> + <p> + Minor <c>configure</c> test fixes</p> + <p> + Own Id: OTP-15282</p> + </item> + <item> + <p> + Improved robustness of distribution connection setup. In + OTP-21.0 a truly asynchronous connection setup was + introduced. This is further improvement on that work to + make the emulator more robust and also be able to recover + in cases when involved Erlang processes misbehave.</p> + <p> + Own Id: OTP-15297 Aux Id: OTP-15279, OTP-15280 </p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + The socket options <c>recvtos</c>, <c>recvttl</c>, + <c>recvtclass</c> and <c>pktoptions</c> have been + implemented in the socket modules. See the documentation + for the <c>gen_tcp</c>, <c>gen_udp</c> and <c>inet</c> + modules. Note that support for these in the runtime + system is platform dependent. Especially for + <c>pktoptions</c> which is very Linux specific and + obsoleted by the RFCs that defined it.</p> + <p> + Own Id: OTP-15145 Aux Id: ERIERL-187 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.0.8</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + As of ERTS version 10.0 (OTP 21.0) the + <c>erl_child_setup</c> program, which creates port + programs, ignores <c>TERM</c> signals. This setting was + unintentionally inherited by port programs. Handling of + <c>TERM</c> signals in port programs has now been + restored to the default behavior. That is, terminate the + process.</p> + <p> + Own Id: OTP-15289 Aux Id: ERIERL-235, OTP-14943, ERL-576 </p> + </item> + <item> + <p> + The fix made for OTP-15279 in erts-10.07 (OTP-21.0.8) was + not complete. It could cause a new connection attempt to + be incorrectly aborted in certain cases. This fix will + amend that flaw.</p> + <p> + Own Id: OTP-15296 Aux Id: OTP-15279, ERIERL-226 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.0.7</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + A process could get stuck in an infinite rescheduling + loop between normal and dirty schedulers. This bug was + introduced in ERTS version 10.0.</p> + <p> + Thanks to Maxim Fedorov for finding and fixing this + issue.</p> + <p> + Own Id: OTP-15275 Aux Id: PR-1943 </p> + </item> + <item> + <p> + Garbage collection of a distribution entry could cause an + emulator crash if <c>net_kernel</c> had not brought + previous connection attempts on it down properly.</p> + <p> + Own Id: OTP-15279 Aux Id: ERIERL-226 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.0.6</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + A race between termination of a process and resume of the + same process via <c>erlang:resume_process/1</c> could + cause the VM to crash. This bug was introduced in erts + version 10.0 (OTP 21.0).</p> + <p> + Own Id: OTP-15237</p> + </item> + <item> + <p> + When tracing on <c>running</c>, <c>in</c> trace events + could be lost when a process was rescheduled between a + dirty and a normal scheduler.</p> + <p> + Own Id: OTP-15269 Aux Id: ERL-713 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.0.5</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fixed a bug which caused an emulator crash when + <c>enif_send()</c> was called by a NIF that executed on a + dirty scheduler. The bug was either triggered when the + NIF called <c>enif_send()</c> without a message + environment, or when the process executing the NIF was + <c>send</c> traced.</p> + <p> + Own Id: OTP-15223</p> + </item> + <item> + <p> + Fixed a bug causing some Erlang references to be + inconsistently ordered. This could for example cause + failure to look up certain elements with references as + keys in search data structures. This bug was introduced + in R13B02.</p> + <p> + Thanks to Simon Cornish for finding the bug and supplying + a fix.</p> + <p> + *** POTENTIAL INCOMPATIBILITY ***</p> + <p> + Own Id: OTP-15225</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.0.4</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Fixed a bug that prevented the <c>noshell</c> option + from working correctly on Mac OS X and BSD.</p> + <p> + Own Id: OTP-15169</p> + </item> + <item> + <p>Fixed a crash when matching directly against a literal + map using a single key that had been saved on the + stack.</p> + <p> + Own Id: OTP-15184</p> + </item> + <item> + <p>Fix node crash when passing a bad time option to + <c>file:read_file_info/2</c>.</p> + <p> + Own Id: OTP-15196</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.0.3</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Fixed a scheduler bug that caused normal schedulers to + run dirty code.</p> + <p> + Own Id: OTP-15154</p> + </item> + <item> + <p> + Fixed a bug in <c>erlang:trace_info/2</c> which caused + the emulator to crash when a bad argument was passed. The + bug was introduced in ERTS version 10.0.</p> + <p> + Own Id: OTP-15183 Aux Id: ERL-670 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.0.2</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Fixed a rare bug that could cause processes to be + scheduled after they had been freed.</p> + <p> + Own Id: OTP-15067 Aux Id: ERL-573 </p> + </item> + <item> + <p>Fixed a race condition in the inet driver that could + cause receive to hang when the emulator was compiled with + gcc 8.</p> + <p> + Own Id: OTP-15158 Aux Id: ERL-654 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.0.1</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>The keys used in <c>os:getenv</c> and <c>os:putenv</c> + are case-insensitive again on Windows.</p> + <p> + Own Id: OTP-15147 Aux Id: ERL-644 </p> + </item> + </list> + </section> + +</section> + <section><title>Erts 10.0</title> <section><title>Fixed Bugs and Malfunctions</title> @@ -967,6 +2146,194 @@ </section> +<section><title>Erts 9.3.3.9</title> + + <section><title>Improvements and New Features</title> + <list> + <item> + <p>Added an optional <c>./configure</c> flag to compile + the emulator with spectre mitigation: + <c>--with-spectre-mitigation</c></p> + <p>Note that this requires a recent version of GCC with + support for spectre mitigation and the + <c>--mindirect-branch=thunk</c> flag, such as + <c>8.1</c>.</p> + <p> + Own Id: OTP-15430 Aux Id: ERIERL-237 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 9.3.3.8</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + A bug that could cause dirty schedulers to become + unresponsive has been fixed.</p> + <p> + Own Id: OTP-15509 Aux Id: PR-2027, PR-2093 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 9.3.3.7</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fixed bug in operator <c>band</c> of two negative + operands causing erroneous result if the absolute value + of one of the operands have the lowest <c>N*W</c> bits as + zero and the other absolute value is not larger than + <c>N*W</c> bits. <c>N</c> is an integer of 1 or larger + and <c>W</c> is 32 or 64 depending on word size.</p> + <p> + Own Id: OTP-15487 Aux Id: ERL-804 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 9.3.3.6</title> + + <section><title>Improvements and New Features</title> + <list> + <item> + <p>List subtraction (The <c>--</c> operator) will now + yield properly on large inputs.</p> + <p> + Own Id: OTP-15371</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 9.3.3.5</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + ERTS internal trees of monitor structures could get into + an inconsistent state. This could cause <c>'DOWN'</c> + messages not to be delivered when they should, as well as + delivery of <c>'DOWN'</c> messages that should not be + delivered.</p> + <p> + This bug was introduced in ERTS version 9.0 (OTP 20.0) + and was fixed in ERTS version 10.0 (OTP 21.0) due to a + rewrite of the monitor code. That is, this bug only exist + in the OTP 20 release.</p> + <p> + Own Id: OTP-15399 Aux Id: ERL-751, ERIERL-262, OTP-14205 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 9.3.3.4</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fixed bug in <c>ets:select_replace</c> when called with a + fully bound key could cause a following call to + <c>ets:next</c> or <c>ets:prev</c> to crash the emulator + or return invalid result.</p> + <p> + Own Id: OTP-15346</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 9.3.3.3</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fixed a bug which caused an emulator crash when + <c>enif_send()</c> was called by a NIF that executed on a + dirty scheduler. The bug was either triggered when the + NIF called <c>enif_send()</c> without a message + environment, or when the process executing the NIF was + <c>send</c> traced.</p> + <p> + Own Id: OTP-15223</p> + </item> + <item> + <p> + Fixed a bug causing some Erlang references to be + inconsistently ordered. This could for example cause + failure to look up certain elements with references as + keys in search data structures. This bug was introduced + in R13B02.</p> + <p> + Thanks to Simon Cornish for finding the bug and supplying + a fix.</p> + <p> + *** POTENTIAL INCOMPATIBILITY ***</p> + <p> + Own Id: OTP-15225</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 9.3.3.2</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Fixed a race condition in the inet driver that could + cause receive to hang when the emulator was compiled with + gcc 8.</p> + <p> + Own Id: OTP-15158 Aux Id: ERL-654 </p> + </item> + <item> + <p> + Fix bug in generation of erl_crash.dump, which could + cause VM to crash.</p> + <p> + Bug exist since erts-9.2 (OTP-20.2).</p> + <p> + Own Id: OTP-15181</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 9.3.3.1</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Fixed a rare bug that could cause processes to be + scheduled after they had been freed.</p> + <p> + Own Id: OTP-15067 Aux Id: ERL-573 </p> + </item> + </list> + </section> + +</section> + <section><title>Erts 9.3.3</title> <section><title>Fixed Bugs and Malfunctions</title> @@ -1196,6 +2563,22 @@ </section> +<section><title>Erts 9.2.0.1</title> + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + Extra internal consistency checks wrt communication with + erl_child_setup process.</p> + <p> + Own Id: OTP-15488 Aux Id: ERIERL-231 </p> + </item> + </list> + </section> + +</section> + <section><title>Erts 9.2</title> <section><title>Fixed Bugs and Malfunctions</title> @@ -2394,6 +3777,116 @@ </section> +<section><title>Erts 8.3.5.7</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fixed bug in operator <c>band</c> of two negative + operands causing erroneous result if the absolute value + of one of the operands have the lowest <c>N*W</c> bits as + zero and the other absolute value is not larger than + <c>N*W</c> bits. <c>N</c> is an integer of 1 or larger + and <c>W</c> is 32 or 64 depending on word size.</p> + <p> + Own Id: OTP-15487 Aux Id: ERL-804 </p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p>Added an optional <c>./configure</c> flag to compile + the emulator with spectre mitigation: + <c>--with-spectre-mitigation</c></p> + <p>Note that this requires a recent version of GCC with + support for spectre mitigation and the + <c>--mindirect-branch=thunk</c> flag, such as + <c>8.1</c>.</p> + <p> + Own Id: OTP-15430 Aux Id: ERIERL-237 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 8.3.5.6</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fixed small memory leak that could occur when sending to + a terminating port.</p> + <p> + Own Id: OTP-14609 Aux Id: ERIERL-238 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 8.3.5.5</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Fixed a race condition in the inet driver that could + cause receive to hang when the emulator was compiled with + gcc 8.</p> + <p> + Own Id: OTP-15158 Aux Id: ERL-654 </p> + </item> + <item> + <p> + Fixed a bug causing some Erlang references to be + inconsistently ordered. This could for example cause + failure to look up certain elements with references as + keys in search data structures. This bug was introduced + in R13B02.</p> + <p> + Thanks to Simon Cornish for finding the bug and supplying + a fix.</p> + <p> + *** POTENTIAL INCOMPATIBILITY ***</p> + <p> + Own Id: OTP-15225</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 8.3.5.4</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Fixed a bug in file closure on Unix; close(2) was + retried on EINTR which could cause a different (recently + opened) file to be closed as well.</p> + <p> + Own Id: OTP-14775</p> + </item> + <item> + <p> + A race-condition when tearing down a connection with + active node monitors could cause the runtime system to + crash.</p> + <p> + This bug was introduced in ERTS version 8.0 (OTP 19.0).</p> + <p> + Own Id: OTP-14781 Aux Id: OTP-13047 </p> + </item> + </list> + </section> + +</section> + <section><title>Erts 8.3.5.3</title> <section><title>Fixed Bugs and Malfunctions</title> @@ -4221,6 +5714,37 @@ </section> +<section><title>Erts 7.3.1.6</title> + + <section><title>Improvements and New Features</title> + <list> + <item> + <p>List subtraction (The <c>--</c> operator) will now + yield properly on large inputs.</p> + <p> + Own Id: OTP-15371</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 7.3.1.5</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fixed small memory leak that could occur when sending to + a terminating port.</p> + <p> + Own Id: OTP-14609 Aux Id: ERIERL-238 </p> + </item> + </list> + </section> + +</section> + <section><title>Erts 7.3.1.4</title> <section><title>Fixed Bugs and Malfunctions</title> <list> @@ -5713,6 +7237,103 @@ </section> +<section><title>Erts 6.4.1.7</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + A process communicating with a port via one of the + <c>erlang:port_*</c> BIFs could potentially end up in an + inconsistent state if the port terminated during the + communication. When this occurred the process could later + block in a <c>receive</c> even though it had messages + matching in its message queue.</p> + <p> + This bug was introduced in erts version 5.10 (OTP R16A).</p> + <p> + Own Id: OTP-13424 Aux Id: OTP-10336 </p> + </item> + <item> + <p> + Calls to <c>erl_drv_send_term()</c> or + <c>erl_drv_output_term()</c> from a non-scheduler thread + while the corresponding port was invalid caused the + emulator to enter an inconsistent state which eventually + caused an emulator crash.</p> + <p> + Own Id: OTP-13866</p> + </item> + <item> + <p>Driver and NIF operations accessing processes or ports + could cause an emulator crash when used from + non-scheduler threads. Those operations are:</p> <list> + <item><c>erl_drv_send_term()</c></item> + <item><c>driver_send_term()</c></item> + <item><c>erl_drv_output_term()</c></item> + <item><c>driver_output_term()</c></item> + <item><c>enif_send()</c></item> + <item><c>enif_port_command()</c></item> </list> + <p> + Own Id: OTP-13869</p> + </item> + <item> + <p> + Fix bug in <c>binary_to_term</c> for binaries created by + <c>term_to_binary </c> with option <c>compressed</c>. The + bug can cause <c>badarg</c> exception for a valid binary + when Erlang VM is linked against a <c>zlib</c> library of + version 1.2.9 or newer. Bug exists since OTP 17.0.</p> + <p> + Own Id: OTP-14159 Aux Id: ERL-340 </p> + </item> + <item> + <p> + Fixed bug in operator <c>bxor</c> causing erroneuos + result when one operand is a big <em>negative</em> + integer with the lowest <c>N*W</c> bits as zero and the + other operand not larger than <c>N*W</c> bits. <c>N</c> + is an integer of 1 or larger and <c>W</c> is 32 or 64 + depending on word size.</p> + <p> + Own Id: OTP-14514</p> + </item> + <item> + <p> + Fixed bug in <c>binary_to_term</c> and + <c>binary_to_atom</c> that could cause VM crash. + Typically happens when the last character of an UTF8 + string is in the range 128 to 255, but truncated to only + one byte. Bug exists in <c>binary_to_term</c> since ERTS + version 5.10.2 (OTP_R16B01) and <c>binary_to_atom</c> + since ERTS version 9.0 (OTP-20.0).</p> + <p> + Own Id: OTP-14590 Aux Id: ERL-474 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 6.4.1.6</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + When calling <c>garbage_collect/[1,2]</c> or + <c>check_process_code/[2,3]</c> from a process with a + higher priority than the priority of the process operated + on, the run queues could end up in an inconsistent state. + This bug has now been fixed.</p> + <p> + Own Id: OTP-13298 Aux Id: OTP-11388 </p> + </item> + </list> + </section> + +</section> + <section><title>Erts 6.4.1.5</title> <section><title>Fixed Bugs and Malfunctions</title> @@ -18539,4 +20160,3 @@ </section> </section> </chapter> - |