diff options
author | redi <redi@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-03-25 19:39:52 +0000 |
---|---|---|
committer | redi <redi@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-03-25 19:39:52 +0000 |
commit | 8b2bda17155a83dd11a89632b8865f65e02dd850 (patch) | |
tree | f6a984712bff0b59d65a2d49b34db8bbbe433680 /libstdc++-v3 | |
parent | 9a225e5a35c60f31c914336afd892055dcd4ad58 (diff) | |
download | ppe42-gcc-8b2bda17155a83dd11a89632b8865f65e02dd850.tar.gz ppe42-gcc-8b2bda17155a83dd11a89632b8865f65e02dd850.zip |
PR libstdc++/60658
* include/bits/atomic_base.h (__atomic_base<_PTp*>::is_lock_free()):
Use sizeof pointer type not the element type.
* testsuite/29_atomics/atomic/60658.cc: New.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@208819 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libstdc++-v3')
-rw-r--r-- | libstdc++-v3/ChangeLog | 7 | ||||
-rw-r--r-- | libstdc++-v3/include/bits/atomic_base.h | 4 | ||||
-rw-r--r-- | libstdc++-v3/testsuite/29_atomics/atomic/60658.cc | 43 |
3 files changed, 52 insertions, 2 deletions
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index 9da6c67b467..f6008d1e3e9 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -1,3 +1,10 @@ +2014-03-25 Jonathan Wakely <jwakely@redhat.com> + + PR libstdc++/60658 + * include/bits/atomic_base.h (__atomic_base<_PTp*>::is_lock_free()): + Use sizeof pointer type not the element type. + * testsuite/29_atomics/atomic/60658.cc: New. + 2014-03-24 Jakub Jelinek <jakub@redhat.com> * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update. diff --git a/libstdc++-v3/include/bits/atomic_base.h b/libstdc++-v3/include/bits/atomic_base.h index 7d2ba759e9a..242459ad01e 100644 --- a/libstdc++-v3/include/bits/atomic_base.h +++ b/libstdc++-v3/include/bits/atomic_base.h @@ -768,11 +768,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION bool is_lock_free() const noexcept - { return __atomic_is_lock_free(_M_type_size(1), nullptr); } + { return __atomic_is_lock_free(sizeof(__pointer_type), nullptr); } bool is_lock_free() const volatile noexcept - { return __atomic_is_lock_free(_M_type_size(1), nullptr); } + { return __atomic_is_lock_free(sizeof(__pointer_type), nullptr); } _GLIBCXX_ALWAYS_INLINE void store(__pointer_type __p, diff --git a/libstdc++-v3/testsuite/29_atomics/atomic/60658.cc b/libstdc++-v3/testsuite/29_atomics/atomic/60658.cc new file mode 100644 index 00000000000..5634085ad4b --- /dev/null +++ b/libstdc++-v3/testsuite/29_atomics/atomic/60658.cc @@ -0,0 +1,43 @@ +// { dg-require-atomic-builtins "" } +// { dg-options "-std=gnu++11" } + +// Copyright (C) 2014 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 3, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING3. If not see +// <http://www.gnu.org/licenses/>. + +#include <atomic> +#include <testsuite_hooks.h> + +// libstdc++/60658 + +struct Foo { + char buf[1]; +}; + +struct Bar { + char buf[100]; +}; + +int +main () +{ + bool test __attribute__((unused)) = true; + + std::atomic<Foo*> a; + std::atomic<Bar*> b; + + VERIFY (a.is_lock_free() == b.is_lock_free()); +} |