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259 changes: 259 additions & 0 deletions erts/doc/src/notes.xml
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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>
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<p>This document describes the changes made to the asn1 application.</p>


<section><title>Asn1 2.0.4</title>

<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
The default value for a <c>BIT STRING</c> would not
always be recognized, causing the encoding to be
incorrect for the DER/PER/UPER encodings.</p>
<p>
Own Id: OTP-11319</p>
</item>
<item>
<p>
The <c>asn1</c> application would fail to build if the
<c>.erlang</c> file printed something to standard output.</p>
<p>
Own Id: OTP-11360</p>
</item>
<item>
<p>An union of integer ranges in an INTEGER constraint
could sometimes be interpreted as the intersection of the
range.</p>
<p>
Own Id: OTP-11411 Aux Id: seq12443 </p>
</item>
<item>
<p>
Extensible, multiple single value constraints (such as
<c>INTEGER (1|17, ...)</c>) would be incorrectly encoded.</p>
<p>
Own Id: OTP-11415</p>
</item>
<item>
<p>
The ASN.1 compiler would fail to compile a constraint
with values given for for the extension part (such as
<c>INTEGER (1..10, ..., 11..20)</c>).</p>
<p>
Own Id: OTP-11504</p>
</item>
</list>
</section>


<section><title>Improvements and New Features</title>
<list>
<item>
<p>
The new option '<c>no_ok_wrapper</c>' generates
M:encode/2 and M:decode/2 functions that don't wrap the
return value in an {ok,...} tuple.</p>
<p>
Own Id: OTP-11314</p>
</item>
</list>
</section>

</section>

<section><title>Asn1 2.0.3</title>

<section><title>Fixed Bugs and Malfunctions</title>
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#next version number to use is 2.0
ASN1_VSN = 2.0.3
ASN1_VSN = 2.0.4
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