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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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Conflicts:
OTP_VERSION
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Conflicts:
erts/emulator/Makefile.in
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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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* maint:
erts: After a call to a tracer nif, reset htop
erts: Check if return_to trace is enabled for bif
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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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* 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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Broken on master by f0f4e72c8ec5c08993ff.
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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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Conflicts:
OTP_VERSION
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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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* bjorn/gc-bifs:
compiler: Eliminate num_bif_SUITE
erl_internal: Eliminate duplication of guard tests
beam_debug: Improve the disassembly of gc_bif instructions
Simplify creation of new GC BIFs
make_tables: Remove broken automatic BIF aliasing
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* bjorn/erts/use-const:
beam_makeops: Save some memory by making loader tables 'const'
beam_makeops: Separate static information from counters
make_preload: Save some memory by making preloaded code 'const'
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Nice to have for core dump inspection when stderr -> /dev/null.
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Using the translation table in erts_gc_bifs[], we can now print
out the name of GC BIFs, instead of just the pointer value.
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Add the BIF type "gcbif" in bif.tab for defining GC BIFs. That will
eliminate some of the hand-written administrative code for handling
GC BIFs, saving the developer's time.
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Before:
$ size bin/x86_64-unknown-linux-gnu/beam.smp
text data bss dec hex filename
3080982 188369 158472 3427823 344def bin/x86_64-unknown-linux-gnu/beam.smp
After:
$ size bin/x86_64-unknown-linux-gnu/beam.smp
text data bss dec hex filename
3164694 104657 158472 3427823 344def bin/x86_64-unknown-linux-gnu/beam.smp
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The counters are only used in the special 'icount' emulator.
We will save some memory by including the counters in the
OpEntry. It will also make it possible to make opc 'const'.
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The make_tables script still contains a broken implementation
of a mechanism to automatically give a BIF an additional
(for example, was used for erlang:'++'/2 and erlang:append/2).
When that featured broke, it was worked around by adding
additional entries to bif.tab. There is therefore no reason
to mend the feature.
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