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It has been decided that it was to early to deprecate the old
string functions.
This partially reverts commit ccb3f7f9768d3c28783c771df47eec1829e51802.
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* maint:
Updated OTP version
Update release notes
Update version numbers
ssh: Fix bad spec for double_algs() in ssh.hrl
Test event insert from init
Fix init to allow all actions
Conflicts:
OTP_VERSION
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* hans/ssh/spec_double_algs/OTP-14990:
ssh: Fix bad spec for double_algs() in ssh.hrl
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maint-20
* raimo/stdlib/fix-gen_statem-init-actions-check/OTP-13995:
Test event insert from init
Fix init to allow all actions
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statistics(runtime) does not seem to work on some virtual machines.
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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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* bjorn/misc-beam-fixes:
Correctly handle get_map_elements with a literal map
core_parse: Fix handling of negative sizes in binaries
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Remove unused cerl_messagean module
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kernel: in the group added processing of 'EXIT' signal from shell
OTP-14991
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stdlib: Add function lists:search/2
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Short-circuit code:ensure_loaded for already-loaded modules
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More typos
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* john/erts/fix-set-owner-group/ERL-589:
Fix file:change_group/change_owner
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A literal negative size in binary construction would cause a crash.
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* bjorn/compiler/misc-fixes:
Teach beam_utils:replace_labels/4 to handle recv_{mark,set}
v3_kernel: Stop ensuring one return value in #k_try{}
v3_kernel_pp: Print return variables for #k_try{}
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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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* hans/ssh/faster_app_stop/OTP-14988:
ssh: Remove deadlock in supervisor tree
ssh: Remove spawn in ssh_system_sup:stop_system/1
ssh: Removed unused sshc_sup:stop_child/1
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* hans/ssh/cuddle_tests_master:
ssh: Join basic and renegotiation suites and parallelize
ssh: Parallelize ssh_basic_SUITE
ssh: Parallelize ssh_renegotiate_SUITE
ssh: Fix non-working test + add log in test suite
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* maint:
Updated OTP version
Update release notes
ssl: Prepare for release
ssl: Remove duplicate release note
ssl: Fix filter function to not discard AEAD cipher suites
Conflicts:
OTP_VERSION
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make erlang:process_info/1 not retrieve messages
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The missing support for renumbering labels in recv_mark
and recv_set did not seem to cause any problems, probably because
the insructions are introduced late and their labels would keep
their numbers. But it there will definitely be a problem if the
recv_mark and recv_set instructions would be introduced much earlier.
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For unclear reasons, v3_kernel attempts to guarantee that #k_try{}
always has at least one return value, even if it will never be
used. I said "attempts", because the handler block that is executed
when an exception is caught does not have the same guarantee. That
means that if an exception is thrown, the return value will not
actually be set.
In practice, however, this is not a problem for the existing code
generator (v3_codegen). The generated code will still be safe.
If we are to rewrite the code generator to generate an SSA-based
intermediate format, this inconsistency *will* cause problems
when creating phi nodes.
While at it, also remove an unecessary creation of new variables
in generation of #k_try_enter{}.
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Conflicts:
OTP_VERSION
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* ingela/ssl/no-sslv2-hello-support/OTP-14824:
ssl: Remove interoperability option v2_hello_compatible
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* sverker/send-tick/OTP-14681:
kernel: Fix and improve send_tick logic
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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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* hasse/dialyzer/extra-range/OTP-14970:
ssl: Correct some specs
os_mon: Correct a spec
Fix broken spec in beam_asm
Dialyzer should not throw away spec information because of overspec
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