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and add 'dirty_scheduler_support' to ErlNifSysInfo
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enif_schedule_nif() put LAST of the unconditional functions to keep the
order which is vital for ABI compatibility on Windows.
The conditional dirty scheduler stuff moved down at the end of the list
to keep them out of the way. We don't want them mess things up then they
become unconditional some day.
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* rickard/memory_consuming_tuple_tests:
Only run upper boundry tuple test with lots of memory
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OTP-12128
* vinoski/enif-schedule-nif:
Fix leak of NIF exports
Use separate allocation type for NIF export
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* sverk/term_to_binary-realloc-size/OTP-12141:
erts: Fix bug in term_to_binary that reallocates binary with wrong size
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* sverk/MIN_SMALL-to-integer:
erts: Correct conversion of MIN_SMALL numeral to fixnum
OTP-12140
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list_to_integer and binary_to_integer returned un-normalized bignum for
-134217728 on 32-bit and -576460752303423488 on 64-bit.
Thanks to Jesper Louis Andersen, Mikael Pettersson
and Anthony Ramine for report, initial patch and optimization suggestion.
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* sverk/nif-inspect-copy-bug/OTP-9828:
erts: Fix bug with enif_make_copy reallocating writable binary
Conflicts:
erts/emulator/test/nif_SUITE.erl
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that could invalidate a pointer received from an earlier
call to enif_inspect_binary.
Solution: Emasculate writable binary at enif_inspect_binary. There are
room for optimizations here as we now do an unconditional emasculation
even though enif_make_copy is not called later in the NIF.
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* rickard/runnable-trace-ooo-bug/OTP-12105:
Fix busy_port_SUITE:io_to_busy test-case
Ensure "runnable port" trace messages are not sent out of order
Ensure "runnable proc" trace messages are not sent out of order
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* rickard/port-emigrate-bug/maint/OTP-12084:
Verify run-queue asserts
Fix emigrate bug in erts_port_task_schedule()
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* vinoski/enif-schedule-nif:
add enif_schedule_nif() to NIF API
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In the #erlang IRC channel Anthony Ramine once mentioned the idea of
allowing a NIF to use an emulator trap, similar to a BIF trap, to schedule
another NIF for execution. This is exactly how dirty NIFs were implemented
for Erlang/OTP 17.0, so this commit refactors and generalizes that dirty
NIF code to support a new enif_schedule_nif() API function.
The enif_schedule_nif() function allows a long-running NIF to be broken
into separate NIF invocations. The NIF first executes part of the
long-running task, then calls enif_schedule_nif() to schedule a NIF for
later execution to continue the task. Any number of NIFs can be scheduled
in this manner, one after another. Since the emulator regains control
between invocations, this helps avoid problems caused by native code tying
up scheduler threads for too long.
The enif_schedule_nif() function also replaces the original experimental
dirty NIF API. The function takes a flags parameter that a caller can use
to indicate the NIF should be scheduled onto either a dirty CPU scheduler
thread, a dirty I/O scheduler thread, or scheduled as a regular NIF on a
regular scheduler thread. With this change, the original experimental
enif_schedule_dirty_nif(), enif_schedule_dirty_nif_finalizer() and
enif_dirty_nif_finalizer() API functions are no longer needed and have been
removed. Explicit scheduling of a dirty NIF finalization function is no
longer necessary; if an application wants similar functionality, it can
have a dirty NIF just invoke enif_schedule_nif() to schedule a non-dirty
NIF to complete its task.
Lift the restriction that dirty NIFs can't call enif_make_badarg() to raise
an exception. This was a problem with the original dirty NIF API because it
forced developers to get and check all incoming arguments in a regular NIF,
and then schedule the dirty NIF which then had to get all the arguments
again. Now, the argument checking can be done in the dirty NIF and it can
call enif_make_badarg() itself to flag incorrect arguments.
Extend the ErlNifFunc struct with a new flags field that allows NIFs to be
declared as dirty. The default value for this field is 0, indicating a
regular NIF, so it's backwards compatible with all existing statically
initialized ErlNifFunc struct instances, and so such instances require no
code changes. Defining the flags field with a value of
ERL_NIF_DIRTY_JOB_CPU_BOUND indicates that the NIF should execute on a
dirty CPU scheduler thread, or defining it with a value of
ERL_NIF_DIRTY_JOB_IO_BOUND indicates that the NIF should execute on a dirty
I/O scheduler thread. Any other flags field value causes a NIF library
loading error.
Extend the ErlNifEntry struct with a new options field that indicates
whether a NIF library was built with support for optional features such as
dirty NIFs. When a NIF library is loaded, the runtime checks the options
field to ensure compatibility. If a NIF library built with dirty NIF
support is loaded into a runtime that does not support dirty NIFs, and the
library defines one or more ErlNifFunc entries with non-zero flags fields
indicating dirty NIFs, a NIF library loading error results. There is no
error if a NIF library built with dirty NIF support is loaded into a
runtime that does not support dirty NIFs but the library does not have any
dirty NIFs. It is also not an error if a library without dirty NIF support
is loaded into a runtime built with dirty NIF support.
Add documentation and tests for enif_schedule_nif().
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* tuncer/misspelled-another:
Fix misspellings of 'another'
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* egil/proc_lib-optimizations/OTP-12060:
stdlib: Update dependencies to erts-6.2
erts: Update preloaded erlang.beam
stdlib: Use erlang:fun_info_mfa/1 in proc_lib:init_p/3
erts: Test erlang:fun_info_mfa/1
erts: Introduce erlang:fun_info_mfa/1
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* nox/reedr-logging/OTP-12115:
Add number of entries to mnesia copy debug message
Add thread index to allocator enomem dump slogan
Add run queue index to process dump info
Add missing error string to syslog logging in epmd
Demote rare debug slogan of message discarding to debug build
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rickard/port-emigrate-bug/maint/OTP-12084
* rickard/port-emigrate-bug/OTP-12084:
Verify run-queue asserts
Fix emigrate bug in erts_port_task_schedule()
Conflicts:
erts/emulator/beam/erl_port_task.c
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* lukas/erts/fix_neg_of_int64_min/OTP-12097:
erts: Fix neg int overflow when sint is min size
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* nox/clang-ubsan/OTP-12097:
Properly handle SINT_MIN in small_to_big()
Use offsetof() in io.c
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* rickard/nosuspend-bug/OTP-12082:
Fix build of test port program
Update Makefile.src
Add async_ports test
Fix abort of nosuspend-tasks in erts_port_task_schedule()
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When INT64_MIN is the value of a Sint64 we have to first cast it to
an Uint64 before negating it. Otherwise we get an integer overflow
which is undefined behaviour and in gcc 4.9 this results in -0 instead
of -9223372036854775808 in gcc 4.8.
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* lukas/erts/malloc_failure_errors/OTP-12085:
erts: Print error reason when malloc fails
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While current run-queue lock is unlocked in the call to
erts_check_emigration_need() from erts_port_task_schedule() the
port can be migrated to another run-queue by another thread.
The code in erts_port_task_schedule() needs to check if this
has occurred when returning from erts_check_emigration_need(), and
if so respect the migration decision. When this was not done,
the thread calling erts_port_task_schedule() held the wrong
run-queue lock which caused invalid updates of the port task queue.
This bug was automatically fixed by the rewrites in the branch
rickard/r16b/port-optimizations-fixes/OTP-10336 (commit
56cef897ca3ad2377e34a6ea5800a54a28cbeb6e) introduced in erts-5.10
and do not effect erts versions after that.
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The sha of the original change is 52810718b
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The counter for the amount of outstanding data in the port queue
became inconsistent when aborting nosuspend-signals in
erts_port_task_schedule(). This since the counter was subtracted
by the data size of the signal although the data size had never
been added to it. This inconsistency caused the port queue to
remain in a busy state forever.
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Conflicts:
erts/doc/src/notes.xml
erts/preloaded/ebin/prim_inet.beam
erts/vsn.mk
lib/kernel/doc/src/notes.xml
lib/kernel/vsn.mk
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Inet close must remove fd from select/poll without closing the fd.
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Introduced for proc_lib:init_p/3
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As there is no overflow for signed integers, -SINT_MIN is undefined behaviour
and the cast to unsigned needs to happen before negation. SINT_MIN denotes the
minimum value that can be stored in the Sint type.
beam/big.c:1512:6: runtime error: negation of -9223372036854775808 cannot be represented in type 'Sint' (aka 'long'); cast to an unsigned type to negate this value to itself
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This silences the following UBSan errors:
beam/io.c:7131:27: runtime error: member access within null pointer of type 'ErlDrvSysInfo'
beam/io.c:7140:20: runtime error: member access within null pointer of type 'ErlDrvSysInfo'
beam/io.c:7166:20: runtime error: member access within null pointer of type 'ErlDrvSysInfo'
beam/io.c:7174:20: runtime error: member access within null pointer of type 'ErlDrvSysInfo'
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* nox/fix-perms:
Fix permissions of some files in the repository
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