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* egil/fix-beam_load-assert:
erts: Fix beam_load assert
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* wmalik/minor-fixes:
Fix proc_lib doc
Remove commented out code
Fix make_hash description
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* maint:
Make access to control_flags safe in non-smp emulator
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* rickard/port_control_flags_crash/OTP-12544:
Make access to control_flags safe in non-smp emulator
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* nox/ets-update_counter-4:
Create new BIF ets:update_counter/4
Allow 4-ary BIFs
OTP-12563
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* nox/maps-match_specs-fixes/OTP-12270:
erts: Strengthen maps match spec compilation tests
Properly collect variables in match specs with maps
Fix compilation of match specs with maps
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Conflicts:
erts/emulator/hipe/hipe_bif0.c
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* mikpe/avoid-oversize-bignums:
don't leave a heap hole in erts_bs_get_integer_2
don't create oversize bignums in binary matching
OTP-12556
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* egil/beam/select_val/OTP-12555:
erts: Use linear search for small select_val arrays
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* egil/process_dictionary-initial-size/OTP-12535:
erts: Document option 'hpds'
erts: Enable command line argument for initial pd size
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Conflicts:
erts/emulator/beam/bif.tab
lib/stdlib/src/ets.erl
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The previous compilation was just plain wrong with push/pop mismatches.
Reported-by: Björn-Egil Dahlberg
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* leoliu/master:
Two minor fixes
OTP-12545
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Use '+hpds size' to set initial process dictionary size for spawned processes.
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* Fix documentation on $char for unicode
* Remove duplicate declaration for erts_encode_ext_dist_header_size
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An extra '}' were printed in remote links.
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Perfctr is a Linux kernel extension that allows programmatic access
to the performance monitoring counters found in most current CPUs.
However, development of perfctr ceased after 2010, and it cannot be
used with Linux kernels newer than 2.6.32.
Therefore the perfctr support code in the Erlang VM is effectively
dead code, so this patch removes it.
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Reset p->htop in the oversize bignum error case to avoid leaving a
hole in the heap, which would crash the debug emulator.
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Bignums are artifically restricted in size. Arithmetic and logical
operations check the sizes of resulting bignums, and turn oversize
results into system_limit exceptions.
However, this check is not performed when bignums are constructed by
binary matching. The consequence is that such matchings can construct
oversize bignums that satisfy is_integer/1 yet don't work. Performing
arithmetic such as Term - 0 fails with a system_limit exception. Worse,
performing a logical operation such as Term band Term results in [].
The latter occurs because the size checking (e.g. in erts_band()) is
a simple ASSERT(is_not_nil(...)) on the result of the bignum operation,
which internally is [] (NIL) in the case of oversize results. However,
ASSERT is a no-op in release builds, so the error goes unnoticed and []
is returned as the result of the band/2.
This patch addresses this by preventing oversize bignums from entering
the VM via binary matching:
- the internal bytes_to_big() procedure is augmented to return NIL for
oversize results, just like big_norm()
- callers of bytes_to_big() are augmented to check for NIL returns and
signal errors in those cases
- erts_bs_get_integer_2() can only fail with badmatch, so that is the
Erlang-level result of oversize bignums from binary matches
- big_SUITE.erl is extended with a test case that fails without this
fix (no error signalled) and passes with it (badmatch occurs)
Credit goes to Nico Kruber for the initial bug report.
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Conflicts:
OTP_VERSION
erts/emulator/sys/unix/sys.c
erts/vsn.mk
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Closes all open socket before writing crashdump to file.
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The intention of this callback is to close all sockets associated to
a port. It is closed only on crashdumps.
This will currently only be used for the epmd port.
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* lukas/erts/crashdump_improvements/OTP-12377:
erts: Make main thread safe from pipe closed event
erts: Improve crash dumps
erts: Rename sys_sigset to sys_signal
erts: Introduce thread suspend functions
erts: Remove usage of QUANTIFY signal
erts: Add support for thread names
ets: Increase data available in crash dumps and ets:info
erts: Start compilation of beam_emu earlier
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This commit improves crash dumps in several ways:
* Suspends schedulers to get a current snapshot
* Dumps information about scheduler
* Dumps stack trace of current running process
(including Garbing processes)
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These functions allow any thread to suspend any other thread
immediately and then resume all threads. This is useful when
doing a crash dump in order to get a more accurate picture
of what state the system is in.
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OTP-12376
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* sverk/ets-take-2/OTP-12309:
erts: Optimize ets:lookup and ets:take for bags
Implement ets:take/2
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* sverk/ct-assert:
erts: Add compile time assert ERTS_CT_ASSERT
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* lukas/erts/cpu_timestamp_linux/OTP-12366:
erts: Allow cpu_timestamp tracing for Linux
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* maint:
Use the new 64-bit atomic ops API
Introduce a 64-bit atomic ops API
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The 64-bit atomic ops API is implemented by
* native word size atomic ops on 64-bit architectures, and
* native double word size atomic ops on 32-bit architectures
when available. When native double word size atomic is not
available, the fallback using modification counters is
used.
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* egil/ets/use-internal-stack/OTP-12356:
erts: Use internal stack for ets db_has_variable
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For searching a key in an array we use linear search in arrays
up to 10 elements.
Selecting on tuple arity will always use linear search.
Instead of using two different instructions we assume selecting on
different tuple arities are always few in numbers.
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and usage
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