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pthread_cond_clockwait() where available""
With the fix for non-Linux.
This reverts commit c1c519d2f1a66dd2eeaa4c321d8d7b50f623eb71.
llvm-svn: 372242
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available"
This reverts commit 5e37d7f9ff257ec62d733d3d94b11f03e0fe51ca.
llvm-svn: 372034
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std::condition_variable is currently implemented via
pthread_cond_timedwait() on systems that use pthread. This is
problematic, since that function waits by default on CLOCK_REALTIME
and libc++ does not provide any mechanism to change from this
default.
Due to this, regardless of if condition_variable::wait_until() is
called with a chrono::system_clock or chrono::steady_clock parameter,
condition_variable::wait_until() will wait using CLOCK_REALTIME. This
is not accurate to the C++ standard as calling
condition_variable::wait_until() with a chrono::steady_clock parameter
should use CLOCK_MONOTONIC.
This is particularly problematic because CLOCK_REALTIME is a bad
choice as it is subject to discontinuous time adjustments, that may
cause condition_variable::wait_until() to immediately timeout or wait
indefinitely.
This change fixes this issue with a new POSIX function,
pthread_cond_clockwait() proposed on
http://austingroupbugs.net/view.php?id=1216. The new function is
similar to pthread_cond_timedwait() with the addition of a clock
parameter that allows it to wait using either CLOCK_REALTIME or
CLOCK_MONOTONIC, thus allowing condition_variable::wait_until() to
wait using CLOCK_REALTIME for chrono::system_clock and CLOCK_MONOTONIC
for chrono::steady_clock.
pthread_cond_clockwait() is implemented in glibc (2.30 and later) and
Android's bionic (Android API version 30 and later).
This change additionally makes wait_for() and wait_until() with clocks
other than chrono::system_clock use CLOCK_MONOTONIC.<Paste>
llvm-svn: 372016
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Thanks to Zoe for the (big, but simple) patch. NFC intended.
llvm-svn: 362252
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Summary:
Freestanding is *weird*. The standard allows it to differ in a bunch of odd
manners from regular C++, and the committee would like to improve that
situation. I'd like to make libc++ behave better with what freestanding should
be, so that it can be a tool we use in improving the standard. To do that we
need to try stuff out, both with "freestanding the language mode" and
"freestanding the library subset".
Let's start with the super basic: run the libc++ tests in freestanding, using
clang as the compiler, and see what works. The easiest hack to do this:
In utils/libcxx/test/config.py add:
self.cxx.compile_flags += ['-ffreestanding']
Run the tests and they all fail.
Why? Because in freestanding `main` isn't special. This "not special" property
has two effects: main doesn't get mangled, and main isn't allowed to omit its
`return` statement. The first means main gets mangled and the linker can't
create a valid executable for us to test. The second means we spew out warnings
(ew) and the compiler doesn't insert the `return` we omitted, and main just
falls of the end and does whatever undefined behavior (if you're luck, ud2
leading to non-zero return code).
Let's start my work with the basics. This patch changes all libc++ tests to
declare `main` as `int main(int, char**` so it mangles consistently (enabling us
to declare another `extern "C"` main for freestanding which calls the mangled
one), and adds `return 0;` to all places where it was missing. This touches 6124
files, and I apologize.
The former was done with The Magic Of Sed.
The later was done with a (not quite correct but decent) clang tool:
https://gist.github.com/jfbastien/793819ff360baa845483dde81170feed
This works for most tests, though I did have to adjust a few places when e.g.
the test runs with `-x c`, macros are used for main (such as for the filesystem
tests), etc.
Once this is in we can create a freestanding bot which will prevent further
regressions. After that, we can start the real work of supporting C++
freestanding fairly well in libc++.
<rdar://problem/47754795>
Reviewers: ldionne, mclow.lists, EricWF
Subscribers: christof, jkorous, dexonsmith, arphaman, miyuki, libcxx-commits
Differential Revision: https://reviews.llvm.org/D57624
llvm-svn: 353086
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Add missing trailing dot.
llvm-svn: 351983
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Reported on the NetBSD 8 buildbot
llvm-svn: 351944
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to reflect the new license. These used slightly different spellings that
defeated my regular expressions.
We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.
Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.
llvm-svn: 351648
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llvm-svn: 350550
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initialized but not referenced".
test/std/depr/depr.c.headers/inttypes_h.pass.cpp
test/std/input.output/file.streams/c.files/cinttypes.pass.cpp
test/std/input.output/iostream.forward/iosfwd.pass.cpp
Add test() to avoid a bunch of void-casts, although we still need a few.
test/std/input.output/iostream.format/quoted.manip/quoted.pass.cpp
skippingws was unused (it's unclear to me whether this was mistakenly copy-pasted from round_trip() below).
test/std/localization/locale.categories/category.collate/locale.collate/types.pass.cpp
test/std/localization/locale.categories/category.ctype/facet.ctype.special/types.pass.cpp
test/std/localization/locale.categories/category.ctype/locale.codecvt/types_char.pass.cpp
test/std/localization/locale.categories/category.ctype/locale.codecvt/types_wchar_t.pass.cpp
test/std/localization/locale.categories/category.ctype/locale.ctype/types.pass.cpp
test/std/localization/locale.categories/facet.numpunct/locale.numpunct/types.pass.cpp
test/std/localization/locales/locale.global.templates/use_facet.pass.cpp
When retrieving facets, the references are unused.
test/std/localization/locale.categories/category.numeric/locale.nm.put/facet.num.put.members/put_long.pass.cpp
test/std/localization/locale.categories/category.numeric/locale.nm.put/facet.num.put.members/put_unsigned_long.pass.cpp
"std::ios_base::iostate err = ios.goodbit;" was completely unused here.
test/std/localization/locale.categories/category.time/locale.time.get/time_base.pass.cpp
test/std/numerics/c.math/ctgmath.pass.cpp
test/std/numerics/rand/rand.device/entropy.pass.cpp
test/std/numerics/rand/rand.device/eval.pass.cpp
test/std/strings/basic.string/string.modifiers/string_copy/copy.pass.cpp
test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char16_t/eof.pass.cpp
test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char32_t/eof.pass.cpp
test/std/thread/futures/futures.promise/dtor.pass.cpp
test/std/thread/futures/futures.task/futures.task.members/dtor.pass.cpp
test/std/thread/thread.condition/thread.condition.condvar/wait_for_pred.pass.cpp
These variables are verifying types but are otherwise unused.
test/std/strings/basic.string/string.capacity/reserve.pass.cpp
old_cap was unused (it's unclear to me whether it was intended to be used).
test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char/eq.pass.cpp
test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char16_t/eq.pass.cpp
test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char16_t/lt.pass.cpp
test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char32_t/eq.pass.cpp
test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char32_t/lt.pass.cpp
test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.wchar.t/eq.pass.cpp
test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.wchar.t/lt.pass.cpp
These tests contained unused characters.
llvm-svn: 286847
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llvm-svn: 273341
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Because <atomic> can now be used in C++03 there is no need for the test_atomic.h header.
This commit removes the header and converts all usages to use <atomic> instead.
llvm-svn: 245468
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Summary:
This patch attempts to fix the last 3 TSAN failures on the libc++ bot (http://lab.llvm.org:8011/builders/libcxx-libcxxabi-x86_64-linux-ubuntu-tsan/builds/143). This patch also adds a `Atomic` test type that can be used where `<atomic>` cannot.
`wait.exception.pass.cpp` and `wait_for.exception.pass.cpp` were failing because the test replaced `std::terminate` with `std::exit`. `std::exit` would asynchronously run the TLS and static destructors and this would cause a race condition. See PR22606 and D8802 for more details.
This is fixed by using `_Exit` to prevent cleanup.
`notify_all_at_thread_exit.pass.cpp` exercises the same race condition but for different reasons. I fixed this test by manually joining the thread before beginning program termination.
Reviewers: EricWF, mclow.lists
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D11046
llvm-svn: 245389
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llvm-svn: 224658
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