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'rickard/new-purge-strategy/OTP-13833' into maint
* rickard/fun-purge-bug/OTP-13809:
Fix purge of code
Reclaim literal area after purge has completed
Separate literal area from code
Conflicts:
erts/doc/src/erlang.xml
erts/emulator/beam/beam_bif_load.c
erts/emulator/beam/erl_init.c
erts/preloaded/ebin/init.beam
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Ensure that we cannot get any dangling pointers into code that
has been purged. This is done by a two phase purge. At first
phase all fun entries pointing into the code to purge are marked
for purge. All processes trying to call these funs will be suspended
and by this we avoid getting new direct references into the code.
When all processes has been checked, these processes are resumed.
The new purge strategy now also completely ignore the existence of
indirect references to the code (funs). If such exist, they will
cause bad fun exceptions to the caller, but will not prevent a
soft purge or cause a kill of a process having such live references
during a hard purge. This since it is impossible to give any
guarantees that no processes in the system have such indirect
references. Even when the system is completely clean from such
references, new ones can appear via distribution and/or disk.
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* lukas/erts/port_monitor_mem_leak/OTP-13818:
erts: Fix port monitor memory leak
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* maint-19:
Updated OTP version
Prepare release
Avoid segfault when printing slogan after crashdumping
Fix race causing lost wakeup on receive-after timeout
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* lukas/erts/tracing/fix_sparc_align_issue/OTP-13803:
erts: Align ErtsThrPrgrLaterOp when free'ing tracer
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On Sparc all structs with a double word element in are assumed
to be allocated on a two word boundary. So we have to make sure
that the ErtsThrPrgrLaterOp * points to 8 / 16 byte aligned memory.
As it only costs one word I've done it on all architectures in case
some unknown other arch also needs this.
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* rickard/erl-crash-dump-bug/OTP-13799:
Avoid segfault when printing slogan after crashdumping
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* rickard/proc-tmo-bug/OTP-13798:
Fix race causing lost wakeup on receive-after timeout
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* raimo/SCTP-socket-stats/ERL-102/OTP-13773:
Fix SCTP send stats in inet_drv
Test inet:getstat/1 dead for SCTP send
Fix test suite compilation warnings
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* margnus1/erts/fix-hipe-literal-gc/PR-1122/OTP-13777:
check_process_code: Sweep HiPE stack for literals
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Regression from OTP-13770 (84549af1c996657aedee1263afec28b21bfa42a4)
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We need to use an initial hash seed for each map pair, i.e. the
hash value. The hash value is reset to the seed for each pair instead
of setting the seed to zero.
If we don't, no additional entropy is given to the system and the
hash collision resolution in maps:from_list/1 would fail.
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This type of statistics is now available through the microstate
accounting API.
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* sverker/update_counter-deadlock/ERL-188/OTP-13731:
erts: Add test ets_SUITE:update_counter_table_growth
erts: Fix deadlock in ets:update_counter/4
erts: Optimize db_finalize_dbterm_hash
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* lukas/erts/tracing/bif_return_to_trace_fix/OTP-13734:
erts: After a call to a tracer nif, reset htop
erts: Check if return_to trace is enabled for bif
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This is needed in order for the heap to never contain
any pointers to invalid memory. This is good for performance
and debugging reasons.
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* lukas/erts/spawn_driver_relative_cd/ERL-175/OTP-13733:
erts: Add port_SUITE:cd invalid dir testcase
erts: Fix spawn driver with relative cd option
erts: Fix HARD_DEBUG printouts in erl_child_setup
erts: Improve error printouts in erl_child_setup
Conflicts:
erts/emulator/test/port_SUITE.erl
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in 'set' with 'write_concurrency'
when inserting default object causes table to grow
and the bucket to split is protected by same lock as the key.
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Always free term after WUNLOCK_HASH
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Symptom: VM abort "Overrun stack and heap"
Problem: The temporary bignum created in buffer tmp_big[] will be
part of the GC initiated by TestHeapPreserve, but its size is not
included which can cause the GC to overflow if very unlucky.
Solution: Do not include tmp_big in the GC.
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We have to do an extra check if the return_to trace is enabled here
as it may have been cleared by the bif after the flags where
created by the call_trace.
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Because check_process_code neglected checking the HiPE stack for
references to the literal area, such references would survive the purge
and subsequent deletion of a module and its literal area. These dangling
references would then cause incorrect behaviour or even hard crashes of
the VM.
By simply adding a scan of the HiPE stack to check_process_code and
erts_garbage_collect_literals, this problem is fixed.
In order to support full stack walks without deleting the graylimit
trap, a new stack walking interface function,
nstack_walk_init_sdesc_ignore_trap() was introduced.
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* hipe-trap-gc/PR-1116:
hipe: Fix bug in trap frame allocation wrappers
hipe: Add assertion for gc in bif without wrapper
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Add prints to stderr with a small description of the error
so that errors will be easier to debug. Also if a protocol
error is detected, erl_child_setup will abort instead of exit.
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The trap frame allocation wrappers occasionally call the garbage
collector, even though built-in functions are not supposed to.
On non-{x86,amd64} platforms, HiPE was optimising the BIF wrapper
interface on the basis that BIFs do not GC. So, when
hipe_reserve_beam_trap_frame called the garbage collector, the state in
the PCB was stale and corruption happened.
Now, these particular BIFs are reclassified as GC BIFs.
Unfortunately, in order to do that we needed to introduce a
gc_bif_interface_3 macro in every hipe_$ARCH_bifs.m4 file.
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An easy source of tricky bugs is to start calling the garbage collector
from a built-in function without adding that bif to hipe_bif_list.m4.
With this change we, in the debug build, keep track of whether the
canonical stack and heap pointers are stored in the PCB or in
registers/stack, allowing us to catch this class of mistakes with an
assertion.
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