When the target doesn't define PTHREAD_RWLOCK_INITIALIZER we use a wrapper around pthread_wrlock_init, but the wrapper only takes one argument and we try to call it with two.
This went unnnoticed on most targets because they do define the PTHREAD_RWLOCK_INITIALIZER macro, but it causes a bootstrap failure on darwin8. PR libstdc++/93244 * include/std/shared_mutex [!PTHREAD_RWLOCK_INITIALIZER] (__shared_mutex_pthread::__shared_mutex_pthread()): Remove incorrect second argument to __glibcxx_rwlock_init. * testsuite/30_threads/shared_timed_mutex/94069.cc: New test. Tested powerpc64le-linux, committed to master. This also needs to be backported to gcc-9 but I'll let the release managers decide whether that's before or after the upcoming 9.3 release.
commit b0815713a32c5cc062bd41fa75dac4d4408215fb Author: Jonathan Wakely <jwak...@redhat.com> Date: Fri Mar 6 12:03:17 2020 +0000 libstdc++: Fix call to __glibcxx_rwlock_init (PR 93244) When the target doesn't define PTHREAD_RWLOCK_INITIALIZER we use a wrapper around pthread_wrlock_init, but the wrapper only takes one argument and we try to call it with two. This went unnnoticed on most targets because they do define the PTHREAD_RWLOCK_INITIALIZER macro, but it causes a bootstrap failure on darwin8. PR libstdc++/93244 * include/std/shared_mutex [!PTHREAD_RWLOCK_INITIALIZER] (__shared_mutex_pthread::__shared_mutex_pthread()): Remove incorrect second argument to __glibcxx_rwlock_init. * testsuite/30_threads/shared_timed_mutex/94069.cc: New test. diff --git a/libstdc++-v3/include/std/shared_mutex b/libstdc++-v3/include/std/shared_mutex index 1d0ce673a76..9b597e76299 100644 --- a/libstdc++-v3/include/std/shared_mutex +++ b/libstdc++-v3/include/std/shared_mutex @@ -160,7 +160,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION public: __shared_mutex_pthread() { - int __ret = __glibcxx_rwlock_init(&_M_rwlock, NULL); + int __ret = __glibcxx_rwlock_init(&_M_rwlock); if (__ret == ENOMEM) __throw_bad_alloc(); else if (__ret == EAGAIN) diff --git a/libstdc++-v3/testsuite/30_threads/shared_timed_mutex/94069.cc b/libstdc++-v3/testsuite/30_threads/shared_timed_mutex/94069.cc new file mode 100644 index 00000000000..6e5cf5f0c6e --- /dev/null +++ b/libstdc++-v3/testsuite/30_threads/shared_timed_mutex/94069.cc @@ -0,0 +1,28 @@ +// Copyright (C) 2020 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/>. + +// { dg-do compile } +// { dg-options "-pthread" } +// { dg-require-effective-target c++14 } +// { dg-require-effective-target pthread } +// { dg-require-gthreads "" } +// +#include <pthread.h> +// This is probably undefined, but we do it to simulate a Pthreads target +// that doesn't define the macro: +#undef PTHREAD_RWLOCK_INITIALIZER +#include <shared_mutex>