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</header>
<p>This document describes the changes made to the ERTS application.</p>
+<section><title>Erts 5.10.4</title>
+
+ <section><title>Fixed Bugs and Malfunctions</title>
+ <list>
+ <item>
+ <p>
+ When normalizing paths, erl_prim_loader would always
+ convert backslash to forward slash. This is correct on
+ Windows, but not on other operating systems.
+ erl_prim_loader now checks which OS is running before
+ performing this conversion.</p>
+ <p>
+ Own Id: OTP-11170</p>
+ </item>
+ <item>
+ <p>
+ Fixed syslog defines and defined LOG_ERR for systems
+ without syslog.h. Thanks to Matt Lewandowsky.</p>
+ <p>
+ Own Id: OTP-11349</p>
+ </item>
+ <item>
+ <p>
+ Check all pattern arguments passed to binary:matches/2.
+ Thanks to Mike Sassak.</p>
+ <p>
+ Own Id: OTP-11350</p>
+ </item>
+ <item>
+ <p>
+ Fix two small silent rules omissions. Thanks to Anthony
+ Ramine.</p>
+ <p>
+ Own Id: OTP-11351</p>
+ </item>
+ <item>
+ <p>
+ Teach configure to detect if posix_memalign cannot align
+ to more than the system page size. </p>
+ <p>
+ For cross-compiled systems a new environment variable
+ called erl_xcomp_posix_memalign has been introduced to
+ indicate whether posix_memalign should be used.</p>
+ <p>
+ Own Id: OTP-11371</p>
+ </item>
+ <item>
+ <p>
+ Fix bsr bug occurring when shifting a huge number a huge
+ number of bits to the right. Thanks to Lars Hesel
+ Christensen.</p>
+ <p>
+ Own Id: OTP-11381</p>
+ </item>
+ <item>
+ <p>
+ Fix memory leak for distributed monitors</p>
+ <p>
+ Own Id: OTP-11410</p>
+ </item>
+ <item>
+ <p>
+ Fix various typos in erts, kernel and ssh. Thanks to
+ Martin Hässler.</p>
+ <p>
+ Own Id: OTP-11414</p>
+ </item>
+ <item>
+ <p>
+ Crashdumps initiated by out-of-memory on process spawn
+ could cause the beam to segfault during crashdump writing
+ due to invalid pointers.</p>
+ <p>
+ The pointers are invalid since the process creation never
+ finished. This fix removes these processes from the
+ printouts. Reported by Richard Carlsson.</p>
+ <p>
+ Own Id: OTP-11420</p>
+ </item>
+ <item>
+ <p>
+ Crash dumps from 64-bit Erlang machines would have all
+ memory addresses truncated to 32 bits, which could cause
+ trouble inspecting processes message queues and stacks in
+ the crashdump viewer.</p>
+ <p>
+ Own Id: OTP-11450</p>
+ </item>
+ <item>
+ <p>
+ Threads other than schedulers threads could make thread
+ unsafe accesses when support for migration of memory
+ carriers had been enabled, i.e., when the <seealso
+ marker="erts_alloc#M_acul"><c>+M&lt;S&gt;acul</c></seealso>
+ command line flag had been passed to <seealso
+ marker="erl"><c>erl</c></seealso>. This could cause
+ corruption of the VMs internal state.</p>
+ <p>
+ This bug was introduced in erts-5.10.2 when the support
+ for migration of memory carriers was introduced.</p>
+ <p>
+ Own Id: OTP-11456 Aux Id: OTP-10279 </p>
+ </item>
+ <item>
+ <p>
+ Fix bug in <c>binary_to_term</c> for invalid bitstrings
+ and very large binaries (>2Gb).</p>
+ <p>
+ Own Id: OTP-11479</p>
+ </item>
+ <item>
+ <p>
+ Under rare circumstances a process calling <seealso
+ marker="kernel:inet#close/1"><c>inet:close/1</c></seealso>,
+ <seealso
+ marker="kernel:gen_tcp#close/1"><c>gen_tcp:close/1</c></seealso>,
+ <seealso
+ marker="kernel:gen_udp#close/1"><c>gen_udp:close/1</c></seealso>,
+ or <seealso
+ marker="kernel:gen_sctp#close/1"><c>gen_sctp:close/1</c></seealso>
+ could hang in the call indefinitely.</p>
+ <p>
+ Own Id: OTP-11491</p>
+ </item>
+ <item>
+ <p>
+ Fix bug that could cause a 32-bit emulator to always
+ crash at start (since R16B01) depending on the alignment
+ of static data in the beam executable.</p>
+ <p>
+ Own Id: OTP-11496</p>
+ </item>
+ <item>
+ <p>
+ Fix benign bugs regarding bitstring compare. Only a
+ nuisance for debug and valgrind VM.</p>
+ <p>
+ Own Id: OTP-11501</p>
+ </item>
+ <item>
+ <p>
+ Silence warnings (Thanks to Anthony Ramine)</p>
+ <p>
+ Own Id: OTP-11517</p>
+ </item>
+ <item>
+ <p>
+ The default wordsize of the emulator (beam) is now
+ determined by compiler default on Mac OSX (Darwin). This
+ was previously forced to 32bits by the configure script
+ unless otherwise specified.</p>
+ <p>
+ Own Id: OTP-11521</p>
+ </item>
+ </list>
+ </section>
+
+
+ <section><title>Improvements and New Features</title>
+ <list>
+ <item>
+ <p>
+ A new memory allocation feature called "super carrier"
+ has been introduced. The super carrier feature can be
+ used in different ways. It can for example be used for
+ pre-allocation of all memory that the runtime system
+ should be able to use.</p>
+ <p>
+ By default the super carrier is disabled. It is enabled
+ by passing the <seealso
+ marker="erts:erts_alloc#MMscs"><c>+MMscs &lt;size in
+ MB&gt;</c></seealso> command line argument. For more
+ information see the documentation of the <seealso
+ marker="erts:erts_alloc#MMsco"><c>+MMsco</c></seealso>,
+ <seealso
+ marker="erts:erts_alloc#MMscrfsd"><c>+MMscrfsd</c></seealso>,
+ <seealso
+ marker="erts:erts_alloc#MMscrpm"><c>+MMscrpm</c></seealso>,
+ <seealso
+ marker="erts:erts_alloc#MMscs"><c>+MMscs</c></seealso>,
+ <seealso
+ marker="erts:erts_alloc#Musac"><c>+MMusac</c></seealso>,
+ and, <seealso
+ marker="erts:erts_alloc#Mlpm"><c>+Mlpm</c></seealso>
+ command line arguments in the <seealso
+ marker="erts:erts_alloc"><c>erts_alloc(3)</c></seealso>
+ documentation.</p>
+ <p>
+ Since it is disabled by default there should be no impact
+ on system characteristics if not used.</p>
+ <p>
+ This change has been marked as a potential
+ incompatibility since the returned list when calling
+ <seealso
+ marker="erts:erlang#system_info_allocator_tuple"><c>erlang:system_info({allocator,
+ mseg_alloc})</c></seealso> now also include an
+ <c>{erts_mmap, _}</c> tuple as one element in the list.</p>
+ <p>
+ *** POTENTIAL INCOMPATIBILITY ***</p>
+ <p>
+ Own Id: OTP-11149</p>
+ </item>
+ <item>
+ <p>
+ Added erlang:system_info(ets_limit) to provide a way to
+ retrieve the runtime's maximum number of ETS tables.
+ Thanks to Steve Vinoski</p>
+ <p>
+ Own Id: OTP-11362</p>
+ </item>
+ <item>
+ <p>
+ Add new BIF os:unsetenv/1 which deletes an environment
+ variable. Thanks to Martin Hässler.</p>
+ <p>
+ Own Id: OTP-11446</p>
+ </item>
+ <item>
+ <p> Introduced a new guarantee regarding exit signals
+ from ports: </p><p> If the process calling one of the
+ synchronous port BIFs listed below is linked to the port
+ identified by the first argument, and the port exits
+ before sending the result of the port operation, the exit
+ signal issued due to this link will be received by the
+ processes before the BIF returns, or fail with an
+ exception due to the port not being open. </p><p> The
+ synchronous port BIFs are: </p> <list> <item><seealso
+ marker="erlang#port_close/1/"><c>port_close/1</c></seealso></item>
+ <item><seealso
+ marker="erlang#port_command/2"><c>port_command/2</c></seealso></item>
+ <item><seealso
+ marker="erlang#port_command/3"><c>port_command/3</c></seealso></item>
+ <item><seealso
+ marker="erlang#port_connect/2"><c>port_connect/2</c></seealso></item>
+ <item><seealso
+ marker="erlang#port_control/3"><c>port_control/3</c></seealso></item>
+ <item><seealso
+ marker="erlang#port_call/3"><c>erlang:port_call/3</c></seealso></item>
+ <item><seealso
+ marker="erlang#port_info/1"><c>erlang:port_info/1</c></seealso></item>
+ <item><seealso
+ marker="erlang#port_info/2"><c>erlang:port_info/2</c></seealso></item>
+ </list> <p> Note that some ports under certain
+ circumstances unlink themselves from the calling process
+ before exiting, i.e. even though the process linked
+ itself to the port there might be no link triggering an
+ exit signal. </p> <p>Characteristics impact: The return
+ or exception from the synchronous port BIF will be
+ delayed if the port simultaneously exit due to some issue
+ unrelated to the outstanding synchronous port BIF call.
+ In all other cases characteristics are unchanged. </p>
+ <p>
+ Own Id: OTP-11489</p>
+ </item>
+ </list>
+ </section>
+
+</section>
+
<section><title>Erts 5.10.3.1</title>
<section><title>Improvements and New Features</title>