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This fixes a bug where a send/shutdown error on an active-mode socket results
in the port never being properly closed.
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This reverts commit eaf8ca41dfa4850437ad270d3897399c9358ced0.
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(First attempt to fix in 23f132d9ab776a.)
If an synchronous GC was requested by calling:
erlang:garbage_collect(Pid, [{async,Ref}])
the reply message could in certain circumstances be
lost.
The problem is that cleanup_sys_tasks() is never called
if there are dirty tasks, but no other active system tasks.
Also shorten the long waiting times in the test case
binary_SUITE:trapping/1 to make it much more likely that
the GC have not already finished when the process is killed.
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The garbage_collect message could be received while waiting for trace messages,
causing the test to crash erroneously.
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OTP-14438
* rickard/sys-proc-off-heap-msgq:
Enable off-heap message queue for code purger, et. al.
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* bjorn/erts/fix-sys-task-cleanup:
erl_process.c: Add more assertions in process termination
Make sure that asynchronous replies are not lost
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The fix avoids registering the main thread as an emulator thread
on MacOSX. This since WX steals the main thread for its own usage
on MacOSX, and use the thread as an ordinary driver thread.
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If a link dependency is added in LDFLAGS it should be resolved
in LIBS, so we have to use LIBS and not TYPE_LIBS.
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Before terminating a process, add assertions to make sure that
all queues for system tasks have been emptied.
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If an synchronous GC was requested by calling:
erlang:garbage_collect(Pid, [{async,Ref}])
the reply message could in certain circumstances be
lost.
The problem is in cleanup_sys_tasks() in erl_process.c.
If there were at least one dirty task, only the first
dirty task would be cleaned up. All other systems tasks
would not be cleaned up (that is, no replies would be
sent to other processes waiting for the tasks to finish).
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OTP-14434
* sverker/crash-dump-seconds-doc:
erts: Clarify ERL_CRASH_DUMP_SECONDS docs
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* bjorn/cuddle-with-tests:
bs_construct_SUITE: Correct calculation of free memory
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* rickard/escript-space-path-fix/OTP-14433:
escript: Do not split path to Erlang system into multiple words
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especially default behavior without -heart,
which is wait indefinitely for crash dump.
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Fix erlang system lookup from escript bug introduced in PR #1293
OTP-14201
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free_mem/0 returned the number of free Kb, but the caller
assumed that it was in Mb.
Also add another clause to further scale down the size of
the binaries created.
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* dgud/erts/revert-default-process-name:
Revert setting default argv0 name
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escript failed to start Erlang systems with spaces in the
absolute path (when absolute path was used).
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Erlang system found in PATH was used even when explicitly pointing out
the escript binary in another Erlang system.
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and base allowed hash deviation on nr of standard deviations
to make it easier to fiddle with the work load.
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* lukas/doc/extend-secure-distr-warn/OTP-14425:
otp: Extend secure distribution docs warnings
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Warnings have been added to the relevant documentation
about not using un-secure distributed nodes in exposed
environments.
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Changing argv[0] from emu name to progname if ESCRIPT_NAME was not set
caused to many failing scripts, revert that part of the change.
See 86f6a9856
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* lukas/erts/etp-processes-ports-optimization:
erts: Optimize etp-processes and etp-ports
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* sverker/enif_select-testing:
erts: Fix nif_SUITE:monitor_frenzy for threadless
erts: Improve message flush in nif_SUITE
erts: Test monitor resource destructor from thread
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Pass number of expected messages in order to
wait longer for messages (for slow machines)
while not wasting test time waiting for nothing.
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which is scheduled on non-smp VM.
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#### Why do we need this new feature?
There are cases when a NIF needs to send a message, using `enif_send()`, to a long-lived process with a registered name.
A common use-case is logging, where asynchronous fire-and-forget messages are the norm.
There can also be cases where a yielding or dirty NIF or background thread may request a callback from a service with additional information it needs to complete its operation, yielding or waiting (with suitable timeouts, etc) until its state has been updated through the NIF module's API.
NIFs can only send messages to pids, and the lack of name resolution leaves a complicated dance between separate monitoring processes and the NIF as the only way to keep a NIF informed of the whereabouts of such long-lived processes.
Providing a reliable, built-in facility for NIFs to resolve process (or port) names simplifies these use cases considerably.
#### Risks or uncertain artifacts?
Testing has not exposed any significant risk.
The implementation behaves as expected on regular and dirty scheduler threads as well as non-scheduler threads.
By constraining the `enif_whereis_...()` functions to their minimal scopes and using patterns consistent with related functions, the implementation, testing, and maintenance burden is low.
The API and behavior of existing functions is unchanged.
#### How did you solve it?
While extending `enif_send()` to operate on a pid or an atom (as `erlang:send/2` does) was attractive, it would have entailed changing the type of its `to_pid` parameter and thereby breaking backward compatibility.
The same consideration applies to `enif_port_command()`.
That leaves a choice between 1, 2, or 3 new functions:
1. `enif_whereis()`
2. `enif_whereis_pid()` and `enif_whereis_port()`
3. All of the above.
While option (1), directly mimicking the behavior of `erlang:whereis/1`, is appealing, it poses potential problems if `pid()` or `port()` are subsequently implemented as non-integral types that must be bound to an owning `ErlNifEnv` instance.
Therefore, option (2) has been chosen to use `ErlNifPid`/`ErlNifPort` structures in the API to maintain proper term ownership semantics.
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Not calculating the max, table and invalid addresses
each loop speeds up iterating through the processes list
by about 5x.
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After "Move tracer SecondTraceTerm to Opts map" in commit 115f0ba7
getting the receipient has to be done on a bit different way.
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* sverker/nif-docs:
erts: Improve erl_nif docs
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OTP-14152
* rickard/ds-runqs:
Make statistics/1 aware of dirty run-queues and tasks
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* raimo/erts/use-all-bytes-in-abstract-addresses/OTP-14305:
Do not zero terminate Linux abstract addresses
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* bjorn/erts/refactor-beam_makeops:
Allow multiple types per argument for specific instructions
Modernize subroutine calls by removing '&'
Eliminate the -gen_dest macro flag
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* bjorn/cuddle-with-tests:
code_SUITE: Remove unused functions
Eliminate warning for variable 'Config' being unused
compile_SUITE: Don't create a directory called 'core'
Don't crash in end_per_testcase/2 in code_SUITE:on_load_embedded/1
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