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Diffstat (limited to 'erts/doc/src/notes.xml')
| -rw-r--r-- | erts/doc/src/notes.xml | 457 |
1 files changed, 436 insertions, 21 deletions
diff --git a/erts/doc/src/notes.xml b/erts/doc/src/notes.xml index 2d96ed6105..a726cc7b97 100644 --- a/erts/doc/src/notes.xml +++ b/erts/doc/src/notes.xml @@ -4,7 +4,7 @@ <chapter> <header> <copyright> - <year>2004</year><year>2013</year> + <year>2004</year><year>2015</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -31,6 +31,378 @@ </header> <p>This document describes the changes made to the ERTS application.</p> + +<section><title>Erts 7.2.1</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Revert "Fix erroneous splitting of emulator path"</p> + <p> + Own Id: OTP-13202</p> + </item> + <item> + <p> + Fix HiPE enabled emulator for FreeBSD.</p> + <p> + Own Id: OTP-13204 Aux Id: pr926 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 7.2</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Small documentation fixes</p> + <p> + Own Id: OTP-13017</p> + </item> + <item> + <p> + Fix memory corruption bug caused by disabling + distribution and then re-enable distribution with a node + name that has previously been used by a remote node.</p> + <p> + Own Id: OTP-13076 Aux Id: seq12959 </p> + </item> + <item> + <p> + Renamed variables with name bool as Visual Studio 2015 + now treats this is a keyword.</p> + <p> + Own Id: OTP-13079</p> + </item> + <item> + <p><c>erl_prim_loader</c> has not supported custom + loaders for several releases. In the documentation for + <c>erl_prim_loader</c>, all references to custom loaders + have now been removed.</p> + <p> + Own Id: OTP-13102</p> + </item> + <item> + <p> + Fixed compilation of erts together with libc versions + that do not define __uint32_t.</p> + <p> + Own Id: OTP-13105</p> + </item> + <item> + <p> + erl -make now returns non-zero exit codes on failure</p> + <p> + Own Id: OTP-13107</p> + </item> + <item> + <p> + Fix crash on init:restart in embedded mode caused by + on_load handler process not being relaunched leading to + load failure for modules such as crypto and asn1rt_nif + that need it to be present for correct NIF loading.</p> + <p> + Own Id: OTP-13115</p> + </item> + <item> + <p> + Fix maps decode in erlang:binary_to_term/1</p> + <p>Decoding a term with a large (HAMT) map in an small + (FLAT) map could cause a critical error if the external + format was not produced by beam.</p> + <p> + Own Id: OTP-13125</p> + </item> + <item> + <p> + Fix very rare bug in GC when big maps with a lot of hash + collisions from a remote node are waiting in inner + message queue.</p> + <p> + Own Id: OTP-13146</p> + </item> + <item> + <p> + Fixed a bug that could cause a crash dump to become + almost empty.</p> + <p> + Own Id: OTP-13150</p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> Updated the xmllint target to just check the xml + files with real documentation content.<br/> Corrected + some errors and added some missing target in the DTD's. + </p> + <p> + Own Id: OTP-13026</p> + </item> + <item> + <p> + Add function enif_getenv to read OS environment variables + in a portable way from NIFs.</p> + <p> + Own Id: OTP-13147</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 7.1</title> + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fix bug in ETS that could cause stray objects marked for + deletion to occasionally be missed by the cleanup done by + <c>safe_fixtable(_,false)</c>.</p> + <p> + Own Id: OTP-12870</p> + </item> + <item> + <p> + Fixed VM crash that could occur if a trace port was + linked to a process, and the trace port terminated + abnormally while handling a trace message. This bug has + always existed in the runtime system with SMP support.</p> + <p> + Own Id: OTP-12901</p> + </item> + <item> + <p> + Instead of aborting, the vm now creates a crash dump when + a system process is terminated.</p> + <p> + Own Id: OTP-12934</p> + </item> + <item> + <p> + Fixed a rare emulator dead lock that occurred when + erlang:process_flag(priority,...) was called by a process + that was also scheduled for an internal system activity.</p> + <p> + Own Id: OTP-12943</p> + </item> + <item> + <p> + The runtime system on various posix platforms (except for + Linux and Solaris) could crash when large amounts of + file-descriptors were in use.</p> + <p> + Own Id: OTP-12954</p> + </item> + <item> + <p> + A beam file compiled by hipe for an incompatible runtime + system was sometimes not rejected by the loader, which + could lead to vm crash. This fix will also allow the same + hipe compiler to be used by both normal and debug-built + vm.</p> + <p> + Own Id: OTP-12962</p> + </item> + <item> + <p> + Fix bug in <c>maps:merge/2</c> when called by hipe + compiled code that could cause vm crash. Bug exists since + erts-7.0 (OTP 18.0).</p> + <p> + Own Id: OTP-12965</p> + </item> + <item> + <p> + When tracing with <c>process_dump</c> option, the VM + could abort if there was an ongoing binary match + somewhere in the call stack of the traced process.</p> + <p> + Own Id: OTP-12968</p> + </item> + <item> + <p> + Fixed possible output deadlock in tty driver when hitting + "CTRL-C" in a non-smp emulator shell on unix.</p> + <p> + Own Id: OTP-12987 Aux Id: Seq12947 </p> + </item> + <item> + <p> + Fix <c>binary_to_integer</c> to throw badarg for "+" and + "-" similar to <c>list_to_integer</c>.</p> + <p> + Own Id: OTP-12988</p> + </item> + <item> + <p> + Suppress warning of unused argument when using macro + enif_make_pid.</p> + <p> + Own Id: OTP-12989</p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + Changed default clock source used for OS system time on + MacOS X to <c>gettimeofday()</c> in order to improve + performance. The system can be configured during build to + use the previously used higher resolution clock source by + passing the switch <seealso + marker="doc/installation_guide:INSTALL#Advanced-configuration-and-build-of-ErlangOTP_Configuring"><c>--with-clock-resolution=high</c></seealso> + when configuring the build.</p> + <p> + Own Id: OTP-12945 Aux Id: OTP-12892 </p> + </item> + <item> + <p> + Added the <c>configure</c> option <seealso + marker="doc/installation_guide:INSTALL#Advanced-configuration-and-build-of-ErlangOTP_Configuring"><c>--disable-saved-compile-time</c></seealso> + which disables saving of compile date and time in the + emulator binary.</p> + <p> + Own Id: OTP-12971</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 7.0.3</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fixed a binary memory leak when printing to shell using + the tty driver (i.e. not -oldshell).</p> + <p> + Own Id: OTP-12941</p> + </item> + <item> + <p> + Fix a bug where the standard error port sometimes crashes + with eagain as the reason.</p> + <p> + Own Id: OTP-12942</p> + </item> + <item> + <p> + When tracing with <c>process_dump</c> option, the VM + could abort if there was an ongoing binary match + somewhere in the call stack of the traced process./</p> + <p> + Own Id: OTP-12968</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 7.0.2</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + A process could end up in an inconsistent half exited + state in the runtime system without SMP support. This + could occur if the processes was traced by a port that it + also was linked to, and the port terminated abnormally + while handling a trace message for the process.</p> + <p> + This bug has always existed in the runtime system without + SMP support, but never in the runtime system with SMP + support.</p> + <p> + Own Id: OTP-12889 Aux Id: seq12885 </p> + </item> + <item> + <p> + Removed unnecessary copying of data when retrieving + corrected Erlang monotonic time.</p> + <p> + Own Id: OTP-12894</p> + </item> + <item> + <p> + Changed default OS monotonic clock source chosen at build + time. This in order to improve performance. The behavior + will now on most systems be that (both OS and Erlang) + monotonic time stops when the system is suspended.</p> + <p> + If you prefer that monotonic time elapse during suspend + of the machine, you can pass the command line argument + <c>--enable-prefer-elapsed-monotonic-time-during-suspend</c> + to <c>configure</c> when building Erlang/OTP. The + configuration stage will try to find such a clock source, + but might not be able to find it. Note that there might + be a performance penalty associated with such a clock + source.</p> + <p> + *** POTENTIAL INCOMPATIBILITY ***</p> + <p> + Own Id: OTP-12895</p> + </item> + <item> + <p> + <c>erlang:system_info(end_time)</c> returned a faulty + value on 32-bit architectures.</p> + <p> + Own Id: OTP-12896</p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + The <c>configure</c> command line argument + <c>--enable-gettimeofday-as-os-system-time</c> has been + added which force usage of <c>gettimeofday()</c> for OS + system time. This will improve performance of + <c>os:system_time()</c> and <c>os:timestamp()</c> on + MacOS X, at the expense of worse accuracy, resolution and + precision of Erlang monotonic time, Erlang system time, + and OS system time.</p> + <p> + Own Id: OTP-12892</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 7.0.1</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fix a rare hanging of the VM seen to happen just after + emulator start. Bug exists since R14.</p> + <p> + Own Id: OTP-12859 Aux Id: seq12882 </p> + </item> + </list> + </section> + +</section> + <section><title>Erts 7.0</title> <section><title>Fixed Bugs and Malfunctions</title> @@ -462,19 +834,20 @@ </item> <item> <p> - Use persistent hashmaps for large Maps <p>Maps will use a + Use persistent hashmaps for large Maps</p> + <p>Maps will use a persistent hashmap implementation when the number of pairs in a Map becomes sufficiently large. The change will occur when a Map reaches 33 pairs in size but this - limit might change in the future.</p></p> - <p>The most significant impact for the user by this + limit might change in the future.</p> + <p>The most significant impact for the user by this change is speed, and to a lesser degree memory consumption and introspection of Maps. Memory consumption size is probalistic but lesser than <c>gb_trees</c> or <c>dict</c> for instance. Any other impacts will be transparent for the user except for the following changes.</p> - <p>Semantics of Maps have changed in two incompatible + <p>Semantics of Maps have changed in two incompatible ways compared to the experimental implementation in OTP 17:</p> <list> <item>Hashing of maps is done different by <c>erlang:phash2/1,2</c>, <c>erlang:phash/1</c> and @@ -734,6 +1107,42 @@ </section> +<section><title>Erts 6.4.1.5</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fixed a bug that could cause a crash dump to become + almost empty.</p> + <p> + Own Id: OTP-13150</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 6.4.1.4</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + The 'raw' socket option could not be used multiple times + in one call to any e.g gen_tcp function because only one + of the occurrences were used. This bug has been fixed, + and also a small bug concerning propagating error codes + from within inet:setopts/2.</p> + <p> + Own Id: OTP-11482 Aux Id: seq12872 </p> + </item> + </list> + </section> + +</section> + + <section><title>Erts 6.4.1</title> <section><title>Fixed Bugs and Malfunctions</title> @@ -1122,7 +1531,7 @@ <p> Improved support for atomic memory operations provided by the <url - href="https://github.com/ivmai/libatomic_ops/"><c>libatomic_ops</c></url> + href="https://github.com/ivmai/libatomic_ops/">libatomic_ops</url> library. Most importantly support for use of native double word atomics when implemented by <c>libatomic_ops</c> (for example, implemented for ARM).</p> @@ -2089,22 +2498,28 @@ <p> EEP43: New data type - Maps</p> <p> - With Maps you may for instance: <taglist> <item><c>M0 = - #{ a => 1, b => 2}, % create - associations</c></item> <item><c>M1 = M0#{ a := 10 }, % - update values</c></item> <item><c>M2 = M1#{ "hi" => - "hello"}, % add new associations</c></item> <item><c>#{ - "hi" := V1, a := V2, b := V3} = M2. % match keys with - values</c></item> </taglist></p> + With Maps you may for instance:</p> + <taglist> + <tag/> <item><c>M0 = #{ a => 1, b => 2}, % create + associations</c></item> + <tag/><item><c>M1 = M0#{ a := 10 }, % update values</c></item> + <tag/><item><c>M2 = M1#{ "hi" => + "hello"}, % add new associations</c></item> + <tag/><item><c>#{ "hi" := V1, a := V2, b := V3} = M2. + % match keys with values</c></item> + </taglist> <p> For information on how to use Maps please see Map Expressions in the <seealso marker="doc/reference_manual:expressions#map_expressions"> Reference Manual</seealso>.</p> <p> The current implementation is without the following - features: <taglist> <item>No variable keys</item> - <item>No single value access</item> <item>No map - comprehensions</item> </taglist></p> + features:</p> + <taglist> + <tag/><item>No variable keys</item> + <tag/><item>No single value access</item> + <tag/><item>No map comprehensions</item> + </taglist> <p> Note that Maps is <em>experimental</em> during OTP 17.0.</p> <p> @@ -4264,8 +4679,7 @@ <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 + <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 @@ -4280,7 +4694,8 @@ 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> + This has been removed. </item> + </list> <p> Thanks to Tuncer Ayaz and Shunichi Shinohara for reporting and co-authoring corrections.</p> @@ -6723,12 +7138,12 @@ Own Id: OTP-8726 Aux Id: seq11617 </p> </item> <item> - <p>Fix libm linking with --as-needed flag + <p>Fix libm linking with --as-needed flag</p> <p> When building with "--as-needed" linker flags on Linux the build will fail. This has now been fixed.</p> <p> - (Thanks to Christian Faulhammer)</p></p> + (Thanks to Christian Faulhammer)</p> <p> Own Id: OTP-8728</p> </item> |