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Having threads switch before we sleep can cause applications
to misread the state of the thread. Now, we are consistent
with blocking_region_begin behavior and change th->status
AFTER checking interrupts.
Maybe this can fix [Bug #15002]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64449 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* This reverts commit 647fc1227a4146ecbfeb0d59358abc8d99cd8ae6:
"thread_sync.c (rb_mutex_synchronize): only unlock if we own the mutex"
* Let's try to preserve the semantics of always being locked inside
Mutex#synchronize, even if an exception interrupts ConditionVariable#wait.
* As discussed on [Bug #14999].
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64448 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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This reverts commit r64407.
Maybe it breaks http://mswinci.japaneast.cloudapp.azure.com/vc12-x64/ruby-trunk/log/20180817T095734Z.fail.html.gz
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64447 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64446 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* NEWS: Converted to Markdown format, from (wrongly) Markdown-mixed
RDoc format.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64445 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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Spurious interrupts from SIGCHLD cause Mutex#sleep (via
ConditionVariable#wait) to return early and breaks some use
cases. Since these are outside the programs's control with
MJIT, we will only consider pending interrupts (e.g. those
from Thread#run) and signals which cause a Ruby-level Signal.trap
handler to fire as "spurious" wakeups.
[ruby-core:88537] [Feature #15002]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64444 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64442 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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If an exception is raised inside Mutex#sleep (via ConditionVariable#wait),
we cannot guarantee we can own the mutex in the ensure callback.
However, who owns the mutex at that point does not matter. What
matters is the Mutex is usable after an exception occurs.
* thread_sync.c (rb_mutex_synchronize): only unlock if we own the mutex
* spec/ruby/library/conditionvariable/wait_spec.rb: only test lock
usability after thread kill. Who owns the lock at any
particular moment is an implementation detail which we cannot
easily guarantee.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64441 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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This reverts commit d7ddbff2954ba22b71bdfeba4b94e1c4fb91efb0 (r64436)
Seems worthless at preventing CI failures
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64440 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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Calling rb_mutex_sleep directly should avoid
thread-switching/interrupt checking which can lead to occasional
failures.
Unfortunately, this means overriding Mutex#sleep is no longer
supported. Will let this commit run for a bit see if CI failures
from ConditionVariable specs continue...
cf. https://rubyci.org/logs/rubyci.s3.amazonaws.com/ubuntu/ruby-trunk/log/20180817T213003Z.fail.html.gz
[ruby-core:88524] [Bug #14999]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64436 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64433 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64429 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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I think this issue is solved by Eric Wong.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64427 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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According to some runs in mjit-test (make test-all RUN_OPTS="--jit-wait"),
this test might not be the cause of its failure.
So, let me try running this again.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64426 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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Unfortunately, GitHub may return 500 for temporary failure:
https://travis-ci.org/ruby/ruby/builds/417246523
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64425 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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I gave up to introduce the optimization that skips pc motion by checking
C code's line number. The same code can often be shared by multiple
program counters and it's so hard to achieve the optimization in MJIT's
architecture.
Reverting to improve performance by removing -g1 and to remove so file
when it becomes not necessary.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64424 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64423 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* https://rubyci.org/logs/rubyci.s3.amazonaws.com/unstable11x/ruby-trunk/log/20180817T182406Z.fail.html.gz
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64422 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64417 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64416 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64415 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* This reverts commit 325fd389018897bd156837639675517ef3b7dea5.
* Platform guards in the next commit.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64414 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64413 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64412 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* And keep specs for older versions.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64411 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64410 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* See [Bug #14999].
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64409 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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[Misc #14907]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64408 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* process.c (ruby_waitpid_all): nothing to do unless SIGCHLD is
available.
* signal.c (ruby_nocldwait): used only if SIGCHLD is available.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64407 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64406 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64405 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64404 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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This is not called in signal handlers, so there's no reason for
it. glibc 2.25+ no longer caches getpid(), so it will cost a
syscall for those users.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64403 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* signal.c (sigchld_hit): if SIGCHLD is not available, this variable
never sets.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64402 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64401 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64400 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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Arbitrarily closing file descriptors on exec breaks use cases
where a Ruby process sets up a descriptor for non-Ruby children
to use. For example, the "rake foo" target may spawn any number
of subprocesses (Ruby or not) which depends on parsing the "FOO"
environment variable for out_fd:99 and writing to foo.out
FOO=out_fd:99 rake foo 99>>foo.out
Unfortunately, this introduced one incompatibility in
test/lib/test/unit.rb and it now requires explicitly setting
IO#close_on_exec=true
[ruby-core:88007] [Misc #14907]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64399 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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We (the thread acquiring the mutex) need to acquire the mutex
before being killed to work with ConditionVariable#wait.
Thus we reinstate the acquire-immediately-after-sleeping logic
from pre-r63711 while still retaining the
acquire-after-checking-for-interrupts logic from r63711.
This regression was introduced in
commit 501069b8a4013f2e3fdde35c50e9527ef0061963 (r63711)
("thread_sync.c (rb_mutex_lock): fix deadlock") for
[Bug #14841]
[ruby-core:88503] [Bug #14999] [Bug #14841]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64398 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64397 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64396 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64395 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64394 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64393 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* configure.ac (LIBPATHENV): use DYLD_FALLBACK_LIBRARY_PATH instead of
DYLD_LIBRARY_PATH on macOS, to honor runtime paths embedded in the
binaries. [ruby-core:88487] [Bug #14992]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64392 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* Makefile.in (ruby.pc, ruby-runner.h): fix missing dependencies.
config.status is needed to be up to date, to run it.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64391 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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Same reasoning as the disarm in rb_sigwait_fd_get, the current
thread is already processing signals, so we do not need
UBF_TIMER to continually kick the process, anymore.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64390 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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We do not need to rely on SIGVTALRM for non-sighandler wakeups.
This will reduce spurious wakeups in cases where sigwait_fd
is not grabbed again, soon.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64389 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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For (rare) blocking functions which are not affected by signals,
we need to call the appropriate unblocking function via
`threadptr_trap_interrupt'
While we're at it, handling waitpid/SIGCHLD from gvl.timer isn't
harmful, here.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64388 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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It is possible for Mutex#sleep (via ConditionVariable#wait)
to prematurely wake up under MJIT (because Mutex#sleep can't
handle spurious wakeups). This affects @idle_done_cond in
Net::IMAP#idle and means the response handler may never
set `in_idle' to `true`.
In any case, ensure the infinite looping `raiser' thread
stops running when the test is done.
Will work on reducing the effect of spurious wakeups from
MJIT...
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64387 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64386 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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