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authorErlang/OTP <[email protected]>2011-03-14 18:18:42 +0100
committerErlang/OTP <[email protected]>2011-03-14 18:18:42 +0100
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</header>
<p>This document describes the changes made to the ERTS application.</p>
+<section><title>Erts 5.8.3</title>
+
+ <section><title>Fixed Bugs and Malfunctions</title>
+ <list>
+ <item>
+ <p>
+ The scroll wheel now scrolls the werl window on Windows.</p>
+ <p>
+ Own Id: OTP-8985</p>
+ </item>
+ <item>
+ <p>
+ Some malformed distribution messages could cause VM to
+ crash, this is now corrected.</p>
+ <p>
+ Own Id: OTP-8993</p>
+ </item>
+ <item>
+ <p>
+ The OS function getifaddrs() can return NULL in some
+ address fields for e.g PPP and tunnel devices which
+ caused the emulator to segfault. This bug has now been
+ corrected.</p>
+ <p>
+ Own Id: OTP-8996</p>
+ </item>
+ <item>
+ <p>
+ The expression &lt;&lt;A:0&gt;&gt; would always produce
+ an empty binary, even if <c>A</c> was not an integer.
+ Corrected to cause a <c>badarg</c> exception if the type
+ of <c>A</c> is invalid. (Thanks to Zvi.)</p>
+ <p>
+ Own Id: OTP-8997</p>
+ </item>
+ <item>
+ <p>
+ A bug that potentially could cause an emulator crash when
+ deleting an ETS-table has been fixed. A resource leak
+ when hitting the maximum amount of ETS-tables allowed has
+ also been fixed.</p>
+ <p>
+ Own Id: OTP-8999</p>
+ </item>
+ <item>
+ <p>
+ A bug in the <c>exit/2</c> BIF could potentially cause an
+ emulator crash.</p>
+ <p>
+ Own Id: OTP-9005</p>
+ </item>
+ <item>
+ <p>
+ Due to a bug in glibc the runtime system could abort
+ while trying to destroy a mutex. The runtime system will
+ now issue a warning instead of aborting.</p>
+ <p>
+ Own Id: OTP-9009</p>
+ </item>
+ <item>
+ <p>
+ A bug in epmd could create strange behaviour when
+ listen() calls failed. This is now corrected thanks to
+ Steve Vinoski.</p>
+ <p>
+ Own Id: OTP-9024</p>
+ </item>
+ <item>
+ <p>When setting file_info the win32_driver will now
+ correctly set access and modified time. Previously these
+ entities were swapped.</p>
+ <p>
+ Own Id: OTP-9046</p>
+ </item>
+ <item>
+ <p>
+ Setting scheduler bind type to <c>unbound</c> failed if
+ binding of schedulers wasn't supported, or if CPU
+ topology wasn't present. This even though the
+ documentation stated that it is possible to set the bind
+ type to <c>unbound</c>.</p>
+ <p>
+ Own Id: OTP-9056 Aux Id: Seq11779 </p>
+ </item>
+ <item>
+ <p>Two problems were fixed in crash dump: The time left
+ for timers are now shown as unsigned integers and the
+ contents of ordered_set ETS tables is no longer
+ included.</p>
+ <p>
+ Own Id: OTP-9057</p>
+ </item>
+ <item>
+ <p>
+ The VM could fail to set IP_TOS and SO_PRIORITY in
+ certain situations, either because sockets were supplied
+ as open file descriptors, or because SO_PRIORITY by
+ default was set higher than the user can explicitly set
+ it to. Those situations are now handled.</p>
+ <p>
+ Own Id: OTP-9069</p>
+ </item>
+ <item>
+ <p>
+ Wx on MacOS X generated complains on stderr about certain
+ cocoa functions not beeing called from the "Main thread".
+ This is now corrected.</p>
+ <p>
+ Own Id: OTP-9081</p>
+ </item>
+ <item>
+ <p>
+ Fix a couple typos in driver_entry(3) (thanks to Tuncer
+ Ayaz).</p>
+ <p>
+ Own Id: OTP-9085</p>
+ </item>
+ <item>
+ <p>
+ Mention that "-detached" implies "-noinput"</p>
+ <p>
+ Clarify that specifying "-noinput" is unnecessary if the
+ "-detached" flag is given. (thanks to Holger Wei�)</p>
+ <p>
+ Own Id: OTP-9086</p>
+ </item>
+ <item>
+ <p>
+ A potential problem (found by code inspection) when
+ calling a fun whose code was not loaded has been fixed.</p>
+ <p>
+ Own Id: OTP-9095</p>
+ </item>
+ <item>
+ <p>
+ The emulator could get into a state where it didn't check
+ for I/O.</p>
+ <p>
+ Own Id: OTP-9105 Aux Id: Seq11798 </p>
+ </item>
+ <item>
+ <p>
+ Attempting to create binaries exceeding 2Gb (using for
+ example <c>term_to_binary/1</c>) would crash the emulator
+ with an attempt to allocate huge amounts of memory.
+ (Thanks to Jon Meredith.)</p>
+ <p>
+ Own Id: OTP-9117</p>
+ </item>
+ <item>
+ <p>
+ Fix erlang:hibernate/3 on HiPE enabled emulator (Thanks
+ to Paul Guyot)</p>
+ <p>
+ Own Id: OTP-9125</p>
+ </item>
+ </list>
+ </section>
+
+
+ <section><title>Improvements and New Features</title>
+ <list>
+ <item>
+ <p>From this release, the previously experimental
+ halfword emulator is now official. It can be enabled by
+ giving the <c>--enable-halfword-emulator</c> option to
+ the <c>configure</c> script.</p>
+ <p>The halfword emulator is a 64-bit application, but
+ uses halfwords (32-bit words) for all data in Erlang
+ processes, therefore using less memory and being faster
+ than the standard 64-bit emulator. The total size of all
+ BEAM code and all process data for all processes is
+ limited to 4Gb, but ETS tables and off-heap binaries are
+ only limited by the amount of available memory.</p>
+ <p>
+ Own Id: OTP-8941</p>
+ </item>
+ <item>
+ <p>
+ 32-bit atomic memory operations have been introduced
+ internally in the run time system, and are now used where
+ appropriate. There were previously only atomic memory
+ operations of word size available. The 32-bit atomic
+ memory operations slightly reduce memory consumption, and
+ slightly improve performance on 64-bit runtime systems.</p>
+ <p>
+ Own Id: OTP-8974</p>
+ </item>
+ <item>
+ <p>
+ Performance enhancements for looking up timer-entries and
+ removing timers from the wheel.</p>
+ <p>
+ Own Id: OTP-8990</p>
+ </item>
+ <item>
+ <p>
+ Write accesses to ETS tables have been optimized by
+ reducing the amount of atomic memory operations needed
+ during a write access.</p>
+ <p>
+ Own Id: OTP-9000</p>
+ </item>
+ <item>
+ <p>
+ Strange C coding in the VM made the -D_FORTIFY_SOURCE
+ option to gcc-4.5 react badly. The code is now cleaned up
+ so that it's accepted by gcc-4.5.</p>
+ <p>
+ Own Id: OTP-9025</p>
+ </item>
+ <item>
+ <p>
+ The memory footprint for loaded code has been somewhat
+ reduced (especially in the 64-bit BEAM machine).</p>
+ <p>
+ Own Id: OTP-9030</p>
+ </item>
+ <item>
+ <p>
+ The maximum number of allowed arguments for an Erlang
+ function has been lowered from 256 to 255, so that the
+ number of arguments can now fit in a byte.</p>
+ <p>
+ Own Id: OTP-9049</p>
+ </item>
+ <item>
+ <p>
+ Dependency generation for Makefiles has been added to the
+ compiler and erlc. See the manual pages for
+ <c>compile</c> and <c>erlc</c>. (Thanks to Jean-Sebastien
+ Pedron.)</p>
+ <p>
+ Own Id: OTP-9065</p>
+ </item>
+ </list>
+ </section>
+
+</section>
+
<section><title>Erts 5.8.2</title>
<section><title>Fixed Bugs and Malfunctions</title>