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diff --git a/erts/doc/src/notes.xml b/erts/doc/src/notes.xml index 028a2bbf3d..e996d3e8e3 100644 --- a/erts/doc/src/notes.xml +++ b/erts/doc/src/notes.xml @@ -4,7 +4,7 @@ <chapter> <header> <copyright> - <year>2004</year><year>2011</year> + <year>2004</year><year>2012</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -30,6 +30,620 @@ </header> <p>This document describes the changes made to the ERTS application.</p> +<section><title>Erts 5.9.3.1</title> + + <section><title>Known Bugs and Problems</title> + <list> + <item> + <p> + Create an erl_crash.dump if no heart exists and no + ERL_CRASH_DUMP_SECONDS is set (behaviour changed).</p> + <p> + Don't create an erl_crash.dump if heart do exists and no + ERL_CRASH_DUMP_SECONDS is set (behaviour not changed).</p> + <p> + This changes the behaviour back to the R15B02 default + considering if a beam was running with no heart.</p> + <p> + Own Id: OTP-10602</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 5.9.3</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fix linking in OpenBSD. (Thanks to Matthew Dempsky)</p> + <p> + Own Id: OTP-10395</p> + </item> + <item> + <p> + Fix bug causing fallback atomics to be used even though + healthy gcc atomics or libatomic_ops was detected.</p> + <p> + Own Id: OTP-10418</p> + </item> + <item> + <p> + Ensure 'erl_crash.dump' when asked for it. This will + change erl_crash.dump behaviour.</p> + <p> + * Not setting ERL_CRASH_DUMP_SECONDS will now terminate + beam immediately on a crash without writing a crash dump + file.</p> + <p> + * Setting ERL_CRASH_DUMP_SECONDS to 0 will also terminate + beam immediately on a crash without writing a crash dump + file, i.e. same as not setting ERL_CRASH_DUMP_SECONDS + environment variable.</p> + <p> + * Setting ERL_CRASH_DUMP_SECONDS to a negative value will + let the beam wait indefinitely on the crash dump file + being written.</p> + <p> + * Setting ERL_CRASH_DUMP_SECONDS to a positive value will + let the beam wait that many seconds on the crash dump + file being written.</p> + <p> + A positive value will set an alarm/timeout for restart + both in beam and in heart if heart is running.</p> + <p> + *** POTENTIAL INCOMPATIBILITY ***</p> + <p> + Own Id: OTP-10422 Aux Id: kunagi-250 [161] </p> + </item> + <item> + <p> + Fix bug where MSVRT100.dll was not included in the + windows installer.</p> + <p> + Own Id: OTP-10481</p> + </item> + <item> + <p>In the expression + <c><<Bin/binary,...>></c>, if <c>Bin</c> was + a bitstring with a size not a multiple of 8, either no + exception was generated or an incorrect exception was + generated. (Thanks to Adam Rutkowski for reporting this + bug.)</p> + <p> + Own Id: OTP-10524</p> + </item> + <item> + <p> + The runtime system could crash while scheduling a port + task. The port task was scheduled either due to an + external I/O event being triggered, a driver timeout + being triggered, or data being sent over a distribution + channel.</p> + <p> + Own Id: OTP-10556</p> + </item> + <item> + <p> + <c>erlang:memory(ets)</c> erroneously included the size + of each ETS-table main structure twice.</p> + <p> + Own Id: OTP-10558</p> + </item> + <item> + <p> + Fix compile error in generated file hipe_amd64_bifs.S for + Solaris.</p> + <p> + Own Id: OTP-10577</p> + </item> + <item> + <p> + A faulty spec for process_info/2 could cause false + dialyzer warnings. The spec is corrected.</p> + <p> + Own Id: OTP-10584</p> + </item> + <item> + <p> + In very rare cases, the VM could crash if a garbage + collector was called while executing an appending bit + syntax instruction. The symptom was a core when + reallocating memory in the function erts_bs_append. The + garbage collector bug is now corrected.</p> + <p> + Own Id: OTP-10590</p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + Improve support for building and testing in embedded ppc + environments.</p> + <p> + Own Id: OTP-10265 Aux Id: kunagi-159 + [daf97f67-5724-4812-a5b6-7e86990133d2-1] </p> + </item> + <item> + <p> + Due to a race condition on Windows, sometimes when + printing to standard output and then immediately + terminating erlang all data would not be printed. The + emulator now waits for all data to be printed before + exiting.</p> + <p> + Own Id: OTP-10325 Aux Id: kunagi-166 + [dd72d0e2-3e76-4a51-8b56-7564e24eecae] </p> + </item> + <item> + <p> + The frequency with which sleeping schedulers are woken + due to outstanding memory deallocation jobs has been + reduced.</p> + <p> + Own Id: OTP-10476 Aux Id: OTP-10162 </p> + </item> + <item> + <p> + Clearer warnings about the dangers of misuse of <seealso + marker="erl_nif#WARNING">native functions</seealso> and + <seealso marker="erl_driver#WARNING">drivers</seealso> + have been added to the documentation.</p> + <p> + Own Id: OTP-10557</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 5.9.2</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fix erl_prim_loader errors in handling of primary + archive. The following errors have been corrected:</p> + <p> + <list> <item> If primary archive was named "xxx", then a + file in the same directory named "xxxyyy" would be + interpreted as a file named "yyy" inside the archive. + </item> <item> erl_prim_loader did not correctly create + and normalize absolute paths for primary archive and + files inside it, so unless given with exact same path + files inside the archive would not be found. E.g. if + escript was started as /full/path/to/xxx then + "./xxx/file" would not be found since erl_prim_loader + would try to match /full/path/to/xxx with + /full/path/to/./xxx. Same problem with ../. </item> + <item> Depending on how the primary archive was built, + erl_prim_loader:list_dir/1 would sometimes return an + empty string inside the file list. This was a virtual + element representing the top directory of the archive. + This has been removed. </item> </list></p> + <p> + Thanks to Tuncer Ayaz and Shunichi Shinohara for + reporting and co-authoring corrections.</p> + <p> + Own Id: OTP-10071</p> + </item> + <item> + <p>Fix: Add port-I/O statistics for active once and true + and not only active false.</p> + <p> + Own Id: OTP-10073</p> + </item> + <item> + <p> + The 64-bit windows installer did not look in the right + directories for 64-bit version of Microsoft Visual C++ + 2010 Redistibutable Package and hence took the wrong + decision about having to install the redistributable + package if the 32-bit version was installed but not the + 64-bit and vice versa. This bug has now been fixed + Furthermore the sub-installer for the redistributable + package is now run in silent mode if the erlang installer + is.</p> + <p> + Own Id: OTP-10096</p> + </item> + <item> + <p> + epmd would fail to start automatically when starting a + distributed erlang node installed in a location with a + whitespace in the path.</p> + <p> + Own Id: OTP-10106</p> + </item> + <item> + <p> + A more or less harmless bug that sometimes caused memory + deallocations to be delayed longer than intended has been + fixed.</p> + <p> + Own Id: OTP-10116</p> + </item> + <item> + <p> + Fix bug causing emulator crash when running HiPE on ARM. + Bug has existed since R15B.</p> + <p> + Own Id: OTP-10137</p> + </item> + <item> + <p> A bug regarding spaces in C function prototypes has + been fixed. (Thanks to Richard O'Keefe.) </p> + <p> + Own Id: OTP-10138</p> + </item> + <item> + <p> + Corrected dtrace pid length in message related probes. + (Thanks to Zheng Siyao)</p> + <p> + Own Id: OTP-10142</p> + </item> + <item> + <p> + Correct formating in exit error messages</p> + <p> + Ensure displayed sizes are not negative. (Thanks to + Michael Santos)</p> + <p> + Own Id: OTP-10148</p> + </item> + <item> + <p> + fix escript/primary archive reloading</p> + <p> + If the mtime of an escript/primary archive file changes + after being added to the code path, correctly reload the + archive and update the cache. (Thanks to Tuncer Ayaz)</p> + <p> + Own Id: OTP-10151</p> + </item> + <item> + <p> + Doc fix: link from erlang:now/0 to os:timestamp/0</p> + <p> + Sometimes os:timestamp/0 is more appropriate than + erlang:now/0. The documentation for the former has a link + to the latter; this patch adds a link in the other + direction to make os:timestamp/0 more visible. Thanks to + Magnus Henoch</p> + <p> + Own Id: OTP-10180</p> + </item> + <item> + <p> + The caret in the werl window (on Windows) could appear at + the wrong place after regaining focus. This is now + corrected.</p> + <p> + Own Id: OTP-10181</p> + </item> + <item> + <p> + Fix bug that in some cases could cause corrupted binaries + in ETS tables with <c>compressed</c> option.</p> + <p> + Own Id: OTP-10182</p> + </item> + <item> + <p> + Fix use of "clever" mktime</p> + <p> + Commit 1eef765 introduced regression (conditional + _always_ evaluates to true) in which + erlang:localtime_to_universaltime/2 stopped working on + systems configured with timezone without DST (i.e. UTC) + on *BSD platforms: 1> + erlang:localtime_to_universaltime({{2012,1,1},{0,0,0}}, + true). ** exception error: bad argument Thanks to Piotr + Sikora</p> + <p> + Own Id: OTP-10187</p> + </item> + <item> + <p> + Relocate bodies of DTrace probes to the statically-linked + VM.</p> + <p> + Due to various operating systems (in both the DTrace and + SystemTap worlds) not fully supporting DTrace probes (or + SystemTap-compatibility mode probes) in shared libraries, + we relocate those probes to the statically-linked virtual + machine. This could be seen as pollution of the pristine + VM by a (yet) experimental feature. However:</p> + <p> + 1. This code can be eliminated completely by the C + preprocessor. 2. Leaving the probes in the dyntrace NIF + shared library simply does not work correctly on too many + platforms. *Many* thanks to Macneil Shonle at Basho for + assisting when my RSI-injured fingers gave out. (note: + Solaris 10 and FreeBSD 9.0-RELEASE can take a long time + to compile)</p> + <p> + Own Id: OTP-10189</p> + </item> + <item> + <p> + Fix bug in <c>ets:test_ms/2</c> that could cause emulator + crash when using <c>'$_'</c> in match spec.</p> + <p> + Own Id: OTP-10190</p> + </item> + <item> + <p> + Supplying a filename longer than the operating system + MAX_PATH to file:read_link/1 would cause a crash + (Segemntation fault/Critical Error) on all platforms. + This is now corrected.</p> + <p> + Own Id: OTP-10200</p> + </item> + <item> + <p> + If Perl was configured to interpret files as being + encoded in UTF-8, the build would crash in + <c>make_preload</c>. (Thanks to Aaron Harnly for noticing + this issue.)</p> + <p> + Own Id: OTP-10201</p> + </item> + <item> + <p> + Fix the erlc -MP flag</p> + <p> + Because of a copy-and-paste error in erlc.c, the -MP flag + had the same effect as -MG. As a workaround, you had to + pass +makedep_phony to enable the MP option. This patch + makes -MP work as intended.</p> + <p> + Own Id: OTP-10211</p> + </item> + <item> + <p> + Allow mixed IPv4 and IPv6 addresses to sctp_bindx</p> + <p> + Also allow mixed address families to bind, since the + first address on a multihomed sctp socket must be bound + with bind, while the rest are to be bound using + sctp_bindx. At least Linux supports adding address of + mixing families. Make inet_set_faddress function + available also when HAVE_SCTP is not defined, since we + use it to find an address for bind to be able to mix ipv4 + and ipv6 addresses. Thanks to Tomas Abrahamsson</p> + <p> + Own Id: OTP-10217</p> + </item> + <item> + <p> + Fix support for leap seconds-aware timezones</p> + <p> + erlang:universaltime_to_localtime is leap seconds-aware + (since 2008), however erlang:localtime_to_universaltime + is not, which gives surprising results on systems + configured with leap seconds-aware timezones: 1> + erlang:universaltime_to_localtime({{2012,1,1},{0,0,0}}). + {{2012,1,1},{0,0,0}} 2> + erlang:localtime_to_universaltime({{2012,1,1},{0,0,0}}). + {{2012,1,1},{0,0,24}} and completely breaks + calendar:local_time_to_universal_time_dst: 3> + calendar:local_time_to_universal_time_dst({{2011,1,1},{0,0,0}}). + [] Thanks to Piotr Sikora</p> + <p> + Own Id: OTP-10227</p> + </item> + <item> + <p> + erlsrv: gracefully stop emulator on Windows shutdown</p> + <p> + Windows will send the SERVICE_CONTROL_SHUTDOWN event to + the service control handler when shutting down the + system. Instead of ignoring the event, erlsrv will now + invoke the stop action. Likewise, the Erlang emulator + (and it's po drivers) must not quit upon reception of the + CTRL_SHUTDOWN_EVENT event in th console control handler. + Thanks to Jan Kloetzke</p> + <p> + Own Id: OTP-10228</p> + </item> + <item> + <p> + Fix dtrace bug in file rename operation.</p> + <p> + Own Id: OTP-10234</p> + </item> + <item> + <p> + Fix bug in memory management of driver port data locks + (PDL). In some cases PDLs could be deallocated before + <c>ready_async</c> or <c>async_free</c> callback was + called.</p> + <p> + Own Id: OTP-10249</p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p>Add port and suspend options to lock-counter + profiling. (Thanks to Rick Reed)</p> + <p> + Own Id: OTP-10051</p> + </item> + <item> + <p> + Latency when using the active_once option in gen_tcp + communication is reduced.</p> + <p> + Own Id: OTP-10055 Aux Id: sto139 </p> + </item> + <item> + <p>Remove bit8 option support from inet</p> + <p> + Own Id: OTP-10056</p> + </item> + <item> + <p> + The OS Pid of a port program is now available by calling + erlang:port_info(Port,os_pid), Thanks to Matthias Lang + for the original patch.</p> + <p> + Own Id: OTP-10057</p> + </item> + <item> + <p> + Fix openpty usage in run_erl. </p> + <p> + Reopening a slave file descriptor which was closed + earlier could lead to a misbehaving connection. This has + now been remedied.</p> + <p> + Own Id: OTP-10076</p> + </item> + <item> + <p> + Remove all code, documentation, options and diagnostic + functions which were related to the experimental hybrid + heap implementation.</p> + <p> + Own Id: OTP-10105</p> + </item> + <item> + <p> + Optimizations of memory deallocations.</p> + <p> + Own Id: OTP-10162 Aux Id: OTP-7775 </p> + </item> + <item> + <p> + Optimization of process locking.</p> + <p> + Own Id: OTP-10163</p> + </item> + <item> + <p> + Added a xcomp example file for powerpc-dso-linux-gnu</p> + <p> + Own Id: OTP-10198</p> + </item> + <item> + <p> + Detect when middle endian doubles are used by a platform + and account for it when decoding floats. (Thanks to Mike + Sperber)</p> + <p> + Own Id: OTP-10209</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 5.9.1.2</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + On Linux systems using heart (erl -heart) and a + HEAR_BEAT_TIMEOUT less than default, heart could fire + even though Erlang was running fine after approx 298 to + 497 days (depending on kernel config). This was due to + the behaviour of the times(2) system call. Usage of + times(2) is now replaced with clock_gettime(2) and the + CLOCK_MONOTONIC clock, resulting in a more stable + solution. The Erlang VM itself has used clock_gettime(2) + on linux since before R12B, so this only affects the + heart program.</p> + <p> + Own Id: OTP-10111 Aux Id: seq12075 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 5.9.1.1</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + If threads support for the runtime system had been + disabled at compile time (<c>--disable-threads</c> had + been passed to <c>configure</c>), and the <c>+A</c> + command line argument of <c>erl</c> was passed when + starting the runtime system, <seealso + marker="erl_driver#driver_system_info">driver_system_info()</seealso> + erroneously claimed that the runtime system had async + threads even though it had not.</p> + <p> + Due to this bug the file driver did not split tasks into + smaller chunks, but instead completed the whole task at + once, i.e., the scheduler got occupied with I/O for a + longer time than intended.</p> + <p> + Own Id: OTP-10059</p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + A proposal for a new scheduler wakeup strategy has been + implemented. For more information see the documentation + of the <seealso marker="erl#+sws">+sws</seealso> command + line argument of <c>erl</c>.</p> + <p> + Own Id: OTP-10033 Aux Id: Seq12025 </p> + </item> + <item> + <p> + A switch for configuration of busy wait length for + scheduler threads has been added. For more information + see the documentation of the <seealso + marker="erl#+sbwt">+sbwt</seealso> command line argument + of <c>erl</c>.</p> + <p> + Own Id: OTP-10044 Aux Id: Seq11976 </p> + </item> + <item> + <p> + The extra memory barriers introduced by bug-fix OTP-9281 + were unnecessarily used also on tables without the + <c>write_concurrency</c> option enabled. This could + unnecessarily degrade performance of ETS tables without + <c>write_concurrency</c> on some hardware (e.g. PowerPC) + while not effecting performance at all on other hardware + (e.g. x86/x86_64).</p> + <p> + OTP-9281 (R14B03): ETS tables using the + <c>write_concurrency</c> option could potentially get + into an internally inconsistent state.</p> + <p> + Own Id: OTP-10048 Aux Id: OTP-9281 </p> + </item> + </list> + </section> + +</section> + <section><title>Erts 5.9.1</title> <section><title>Fixed Bugs and Malfunctions</title> |