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* lukas/erts/persistent_term_test_fix:
erts: Fix persistent_term testcases
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* maint-20:
Updated OTP version
Prepare release
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* sverker/big-band-bug/ERL-804/OTP-15487:
erts: Fix bug in 'band' of two negative numbers, one big
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* lukas/erts/inet_pktopts_old_linux/OTP-15494:
erts: Fix inet pktopts on very old linux kernels
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* maint-21:
Updated OTP version
Prepare release
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* sverker/big-band-bug/ERL-804/OTP-15487:
erts: Fix bug in 'band' of two negative numbers, one big
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maint-21
* sverker/fix-atomics-get-large-unsigned/PR-2061/OTP-15486:
erts: Fix possible heap corruption getting atomics
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* lukas/erts/fix-seq_trace-reset_trace/OTP-15490:
erts: Fix seq_trace:reset_trace dirty gc bug
erts: Use sys_memcpy in copy_one_frag
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=== OTP-20.2.0.1 ===
Changed Applications:
- erts-9.2.0.1
Unchanged Applications:
- asn1-5.0.4
- common_test-1.15.3
- compiler-7.1.4
- cosEvent-2.2.2
- cosEventDomain-1.2.2
- cosFileTransfer-1.2.2
- cosNotification-1.2.3
- cosProperty-1.2.3
- cosTime-1.2.3
- cosTransactions-1.3.3
- crypto-4.2
- debugger-4.2.4
- dialyzer-3.2.3
- diameter-2.1.3
- edoc-0.9.2
- eldap-1.2.3
- erl_docgen-0.7.2
- erl_interface-3.10.1
- et-1.6.1
- eunit-2.3.5
- hipe-3.17
- ic-4.4.3
- inets-6.4.5
- jinterface-1.8.1
- kernel-5.4.1
- megaco-3.18.3
- mnesia-4.15.2
- observer-2.6
- odbc-2.12.1
- orber-3.8.4
- os_mon-2.4.4
- otp_mibs-1.1.2
- parsetools-2.1.6
- public_key-1.5.2
- reltool-0.7.5
- runtime_tools-1.12.3
- sasl-3.1.1
- snmp-5.2.9
- ssh-4.6.3
- ssl-8.2.3
- stdlib-3.4.3
- syntax_tools-2.1.4
- tools-2.11.1
- wx-1.8.3
- xmerl-1.3.16
* tag 'OTP-20.2.0.1':
Updated OTP version
Prepare release
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* sverker/big-band-bug/ERL-804/OTP-15487:
erts: Fix bug in 'band' of two negative numbers, one big
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maint
* sverker/fix-atomics-get-large-unsigned/PR-2061/OTP-15486:
erts: Fix possible heap corruption getting atomics
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* sverker/erts/prim_file-perm-own-bigendian/OTP-15485:
erts: Fix warning and potential big-endian-bug in prim_file
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Similar bug as for bxor fixed by abc4fd372d476821448dfb9
Ex:
1> io:format("~.16B\n", [-16#1110000000000000000 band (-1)]).
-1120000000000000000
Wrong result for
(-X bsl WS) band -Y.
where
X is any positive integer
WS is erlang:system_info(wordsize)*8*N where N is 1 or larger
Y is any positive integer smaller than (1 bsl WS)
Fix:
The subtraction of 1 (for 2-complement conversion)
must be carried along all the way to the last words.
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* lukas/erts/fix_lit_msg_copy_in_gc:
erts: Use ptr_val for pointer in gc msg copy
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Due to comparison as a signed integer, when getting an unsigned atomic
in the range 2^63-1..2^64-1 (when the most significant bit was set), the
heap could get corrupted when the integer was retrieved: hsz would get
set to zero, but the code proceeded to build a bignum.
Steps to reproduce (at least on x86_64):
$ erl
1> A = atomics:new(1,[{signed,false}]).
2> atomics:put(A,1,18446744073709551615).
3> atomics:get(A,1).
At the last step, the shell would print some garbage and hang.
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for set_permission and set_owner.
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* sverker/add-since-doc/OTP-15460:
Fill in since for multi-clause functions in erlang.erl
Fix since attribute for troubled function docs
Add empty 'since' attribute for old modules and functions
Add since attribute to dtd
Add "since" attributes in xml for new functions and modules
erl_docgen: Generate "since" OTP version in html
erl_interface: Fix doc for return type 'struct hostent'
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The ones marked since="?" are unknown (but newer than R13B03)
monitor/2
port_info/2
process_flag/2
statistics/1
system_flag/2
system_info/1
trace_pattern/3
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Fix typos in atomics.xml and counters.xml
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When seq_trace:reset_trace could be called while a
process was doing a dirty GC. This triggered a race
where all signals was moved to the internal signal
queue during the GC which in turn caused the a heap
overrun problem.
This fix makes it so that the main and msgq lock are
taken before the clear. This will make sure that we
are allowed to do the clear.
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The multiplication of two bignums is specially optimized when the two
operands have the same address, because squaring can be done more
efficiently than multiplication of two arbitrary integers. That is,
expressions such as `I * I` will be calculated by squaring the value
of `I`.
The optimized function for squaring would read one word beyond the
end of the bignum in the last iteration of a loop. The garbage
value would never be used. In almost all circumstances that would
be harmless. Only if the read word happened to fall on the start
of an unmapped page would the runtime crash. That is unlikely
to happen because most bignums are stored on a process heap, and
since the stack is located at the other end of the block that the
heap is located in, the word beyond the end of bignum is guaranteed
to be readable.
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introduced after OTP_R13B03.
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Without this fix asserts would trigger in debug build
but nothing else would break.
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* lukas/OTP-21.1.1/scheduler_pollset/OTP-15475:
erts: Move fds with active true behaviour to own pollset
erts: Fix lists_member_2 reduction count
erts: Allow code_model_small to be set in xcomp setting
erts: Implement delay_send using timer instead of poll
erts: Optimize driver_set_timer(0) to fire at once
erts: Optimize the inet driver multi timers for one timer
erts: Move all inet tcp CONNECTED timers to multi timer
erts: Add erts_io_notify_port_task_executed to check_io msacc state
erts: Add pre-alloc to ALLOC msacc state
erts: Make thr prgr wakeup current or sched 1
erts: Pass thread progress data where possible
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At start of the VM a poll-set that the schedulers
will check is created where fds that have triggered
many (at the moment, many means 10) times without
being deselected inbetween. In this scheduler specific
poll-set fds do not use ONESHOT, which means that the
number of syscalls goes down dramatically for such fds.
This pollset is introduced in order to handle fds that
are used by the erlang distribution and that never
change their state from {active, true}.
This pollset only handles ready_input events,
ready_output is still handled by the poll threads.
During overload, polling the scheduler poll-set is done
on a 10ms timer.
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garazdawi/lukas/erts/fix_lit_msg_copy_in_gc/ERL-741/OTP-15478
erts: Fix copy of literal msg during gc
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A copy has to be made of the message as there is
a trace token. There was a bug where the actual
message was incorrectly modified even if it was a
literal.
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* lukas/erts/CFLAGS-O-check/OTP-15465:
erts: Fix some 32-bit gcc warnings
erts: Add check that a -O flag is present in CFLAGS
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There have been too many times when users have needed to
enable something through CFLAGS but forgotten to add the
'-O2 -g' flags.
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OTP-15474
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OTP-15473
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The previous implementation uses a round-trip in the poll-set
to simulate a yield of the port context. With the poll thread
implementation this is no longer a good idea as it generated a
lot more work for the system. So this commit changes the
implementation to use a timer instead.
OTP-15471
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By optimizing driver_set_timer for 0 we can use it
instead of select to do a yield in the driver.
Use full for delay_send in the inet driver.
OTP-15472
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The most common case for any socket is to have zero or one
timer, so we optimize for the one case. The only case when
we have more than one timer is when the multi accept feature
is used.
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OTP-15450
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OTP-15450
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