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Combine blocks when running beam_block the second time
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* maint:
dialyzer: Fix a crash
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1a029efd1ad47f started to run the beam_block pass a second time,
but it did not attempt to combine adjacent blocks.
Combining adjacent blocks leads to many more opportunities for
optimizations.
After doing some diffing in generated code, it turns out that
there is no benefit for beam_split to split out line instructions
from blocks. It seems that the only reason it was done was to
slightly simplify the implementation of the no_line_info option
in beam_clean.
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As a preparation for combining blocks before running beam_block
for the second time, disable CSE for floating point operations
because it will generate invalid code.
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* maint:
Check that the stack is initialized when an exception may occur
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Check that the stack is initialized when an exception may occur
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Fix unsafe use of 'allocate' where 'allocate_zero' should be used
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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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* sverker/maint-20/alloc-n-migration/ERIERL-88:
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"
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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into 'sverker/master/alloc-n-migration/ERIERL-88'
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into 'sverker/maint-20/alloc-n-migration/ERIERL-88'
OTP-14915
OTP-14916
OTP-14917
OTP-14918
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lcnt:collect is documented as implicitly starting the lcnt server
but didn't do so prior to this commit. I've decided to extend this
behavior to all operations as the overhead is negligible and it's
a bit more convenient to use.
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The more aggressive optimizations of 'allocate_zero' introduced
in cb6fc15c35c7e could produce unsafe code such as the following:
{allocate,0,1}.
{bif,element,{f,0},[{integer,1},{x,0}],{x,0}}.
The code is not safe because if element/2 fails, the runtime
system may scan the stack and find garbage that looks like a
catch tag, and would most probably crash.
Fix the problem by making beam_utils:is_killed/3 be more conservative
when asked whether a Y register will be killed.
Also fix an unsafe move upwards of an allocation instruction
in beam_block.
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into 'sverker/maint-19/alloc-n-migration/ERIERL-88'
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ageffcaoff: Age First Fit Carrier, Address Order First Fit (within carrier)
ageffcbf : Age First Fit Carrier, Best Fit (within carrier)
ageffcaobf: Age First Fit Carrier, Address Order Best Fit (within carrier)
Prefer old carriers, the older the better.
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dumbbell/dumbbell/ssl/fix-active-once-dropped-when-handling-alert/ERL-562
ssl: Fix alert handling so that unexpected messages are logged and alerted correctly
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Strengthen beam_validator to check that the stack is initialized
when an instruction with an {f,0} operand is executed.
For example, the following code sequence:
{allocate,0,1}.
{bif,element,{f,0},[{integer,1},{x,0}],{x,0}}.
should not be accepted because the stack may be scanned if
element/2 fails. That could cause a crash or other undefined
behavior if garbage on the stack looks like a catch tag.
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... in handle_common_event(), instead of passing it to
handle_own_alert() after wrapping it in a tuple with `StateName` (i.e.
`{StateName, Msg}`).
The `StateName` is passed to handle_normal_shutdown() and to
alert_user(). The latter has a clause matching it against `connection`.
Unfortunately, when the argument was in fact `{StateName, Msg}`, another
clause was executed which dropped the `active` flag value and forced it
to `false`, even if the state was actually `connection`. It meant that
later in send_or_reply(), the alert was not propagated to the user, even
though it should (`active` set to `true` or `once`).
Now that handle_common_event() always passes the actual `StateName`, the
problem is fixed.
ERL-562
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* hasse/no_get_stacktrace/OTP-14861:
erts: Update abstract format doc with stacktrace variable
wx: Do not call erlang:get_stacktrace()
tools: Do not call erlang:get_stacktrace()
stdlib: Do not call erlang:get_stacktrace()
sasl: Do not call erlang:get_stacktrace()
runtime_tools: Do not call erlang:get_stacktrace()
reltool: Do not call erlang:get_stacktrace()
parsetools: Do not call erlang:get_stacktrace()
observer: Do not call erlang:get_stacktrace()
mnesia: Do not call erlang:get_stacktrace() (cont)
mnesia: Do not call erlang:get_stacktrace()
kernel: Do not call erlang:get_stacktrace()
inets: Do not call erlang:get_stacktrace()
eunit: Do not call erlang:get_stacktrace()
et: Do not call erlang:get_stacktrace()
dialyzer: Do not call erlang:get_stacktrace()
debugger: Do not call erlang:get_stacktrace()
debugger: Do not try to restore stacktrace
common_test: Do not call erlang:get_stacktrace()
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Conflicts:
lib/ssl/doc/src/ssl.xml
lib/ssl/src/ssl.erl
lib/ssl/src/ssl_cipher.erl
lib/ssl/test/ssl_basic_SUITE.erl
lib/ssl/test/ssl_test_lib.erl
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Preferably customized cipher suites will be based on the default value.
But all may be used as base and hence it will be good to
handle anonymous suites separately as they are intended for testing purposes.
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* hasse/dialyzer/stacktrace_variable/OTP-14862:
dialyzer: Assign a type to the primop build_stacktrace
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Take care of the call of erlang:get_stacktrace() in
module mnesia_lib.
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The remaining call (in module mnesia_lib) is taken care
of in the following commit.
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Reword docs related to the runtime system mode
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* emj/stdlib/tar-repro/PR-1608/OTP-14834:
Add options for creating reproducible tars
Return error when unable to make dir
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Authenticated encryption (AE) and authenticated encryption with
associated data (AEAD, variant of AE) is a form of encryption which
simultaneously provides confidentiality, integrity, and authenticity
assurances on the data.
This is more logical value then null that was used, this happened to
work as the AEAD property was derived form other data, but it is confusing!
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