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* maint:
Updated OTP version
Update release notes
Update version numbers
ssl: Prepare for release
ssl: Proper handling of clients that choose to send an empty answer to a certificate request
heart: Use ntohs instead of manual conversion
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into maint-20
* john/erts/fix-heart-command-overflow/OTP-15034/ERIERL-166:
heart: Use ntohs instead of manual conversion
# Conflicts:
# lib/kernel/test/heart_SUITE.erl
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Multiplying a signed char by 256 is undefined behavior and caused
problems on some platforms when the length was long enough. We
could cast it to an unsigned int to make it work, but it's best not
to reinvent the wheel.
Fixes OTP-15034
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for erts, stdlib, kernel and runtime_tools.
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OTP-14899
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just to make it easier to do "rm -rf"
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Implementation of true asynchronous signaling between processes
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Communication between Erlang processes has conceptually always been
performed through asynchronous signaling. The runtime system
implementation has however previously preformed most operation
synchronously. In a system with only one true thread of execution, this
is not problematic (often the opposite). In a system with multiple threads
of execution (as current runtime system implementation with SMP support)
it becomes problematic. This since it often involves locking of structures
when updating them which in turn cause resource contention. Utilizing
true asynchronous communication often avoids these resource contention
issues.
The case that triggered this change was contention on the link lock due
to frequent updates of the monitor trees during communication with a
frequently used server. The signal order delivery guarantees of the
language makes it hard to change the implementation of only some signals
to use true asynchronous signaling. Therefore the implementations
of (almost) all signals have been changed.
Currently the following signals have been implemented as true
asynchronous signals:
- Message signals
- Exit signals
- Monitor signals
- Demonitor signals
- Monitor triggered signals (DOWN, CHANGE, etc)
- Link signals
- Unlink signals
- Group leader signals
All of the above already defined as asynchronous signals in the
language. The implementation of messages signals was quite
asynchronous to begin with, but had quite strict delivery constraints
due to the ordering guarantees of signals between a pair of processes.
The previously used message queue partitioned into two halves has been
replaced by a more general signal queue partitioned into three parts
that service all kinds of signals. More details regarding the signal
queue can be found in comments in the erl_proc_sig_queue.h file.
The monitor and link implementations have also been completely replaced
in order to fit the new asynchronous signaling implementation as good
as possible. More details regarding the new monitor and link
implementations can be found in the erl_monitor_link.h file.
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It wasn't possible to change group/owner separately, and our test
suite lacked coverage for that.
ERL-589
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* sverker/dict-put-immed-opt:
erts: Optimize erlang:put/2 for hash collision lists
erts: Optimize erlang:put/2 for immed values
erts: Refactor erlang:put/2
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* raimo/stop-encouraging-v4-mapped/ERL-503/OTP-13716:
Stop translating V4MAPPED addresses
Stop returning V4MAPPED addresses
Implement function for IPv4-mapped IPv6 addresses
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* maint:
Skip testing unavailable interfaces in inet_SUITE:getifaddrs
Make re_SUITE:sub_binaries less unstable
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This test consistently failed on Windows when an interface was
enabled but unplugged, as the interface was 'up' but not 'running'.
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* lukas/kernel/dist_SUITE_corefile_ignore:
kernel: Ignore cores in erl_distribution_SUITE
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Do destructive write of immed value if key exists.
This is an optimization at the expense of get/0
which must now copy all (mutable) key-value tuples.
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* maint:
Updated OTP version
Update release notes
Update version numbers
kernel: Add os:cmd/2 with max_size option
# Conflicts:
# OTP_VERSION
# lib/kernel/doc/src/os.xml
# lib/kernel/src/os.erl
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* maint-20:
Updated OTP version
Update release notes
Update version numbers
erts: Add system_flags(erts_alloc,"+M?sbct *")
erts: Add age order first fit allocator strategies
erts: Refactor erl_ao_firstfit_alloc
erts: Add migration options "acnl" and "acfml"
kernel: Add os:cmd/2 with max_size option
erts: Add more stats for mbcs_pool
erts: Fix alloc_SUITE:migration
stdlib: Make ets_SUITE memory check try again
erts: Improve carrier pool search
erts: Improve alloc_SUITE:migration
erts: Refactor carrier dealloc migration
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Some bash versions segfault when a unicode argument is given
so we ignore cores created by nodes spawned by this testcase.
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* maint:
kernel: Correct contracts and a bug in group_history
stdlib: Correct contracts
dialyzer: Optimize handling of a lot of warnings
Conflicts:
lib/kernel/src/erl_boot_server.erl
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* dgud/kernel/refc_sched_wall_time/OTP-11694:
test: spawn scheduler_wall_time flag holder
Turn on scheduler_wall_time in an alive process
Redirect system_flag(scheduler_wall_time,_) to kernel_refc
kernel: add a resource reference counter
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by limiting the memory usage.
Our valgrind test machine (pharazon) seems to get totally swamped
by this test case.
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System resources/functionality may need to be reference counted
to be handled correctly when used or enabled/disabled from more
than one process or application.
It is easier to handle this in erlang code than in erts, so make a
process that deals with the housekeeping.
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The option no longer does anything at all.
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The old driver didn't fall back to using write(2) if writev(2) failed
due to the combined length of the iov overflowing a ssize_t, but the
new one doesn't have any problems with it so we failed this test with
a case_clause error on 32-bit machines.
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This test revolves around the possibility that the underlying port
can be killed, which is nonsense now that the file suite no longer
uses ports for anything.
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The cumulative wait time was as long as the delay itself in the
flush-on-size test, causing the test to pass because the write
managed to time out.
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