obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 68 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/30_threads/condition_variable_any/53830.cc b/libstdc++-v3/testsuite/30_threads/condition_variable_any/53830.cc
new file mode 100644
index 000000000..91aa348f9
--- /dev/null
+++ b/libstdc++-v3/testsuite/30_threads/condition_variable_any/53830.cc
@@ -0,0 +1,68 @@
+// { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-solaris* *-*-cygwin *-*-darwin* powerpc-ibm-aix* } }
+// { dg-options " -std=gnu++0x -pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* powerpc-ibm-aix* } }
+// { dg-options " -std=gnu++0x -pthreads" { target *-*-solaris* } }
+// { dg-options " -std=gnu++0x " { target *-*-cygwin *-*-darwin* } }
+// { dg-require-cstdint "" }
+// { dg-require-gthreads "" }
+// { dg-require-sched-yield "" }
+// { dg-require-nanosleep "" }
+
+// Copyright (C) 2012 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/>.
+
+// PR libstdc++/53830
+// Test for deadlock in condition_variable_any::wait_for
+
+#include <thread>
+#include <mutex>
+#include <condition_variable>
+#include <chrono>
+#include <atomic>
+
+std::mutex mutex;
+std::condition_variable_any cv;
+
+std::atomic<int> barrier(0);
+
+// waits for data from another thread
+void wait_for_data()
+{
+  std::unique_lock<std::mutex> lock(mutex);
+  barrier = 1;
+  cv.wait_for(lock, std::chrono::milliseconds(100), []{ return false; });
+  // read data
+}
+
+// passes data to waiting thread
+void provide_data()
+{
+  while (barrier == 0)
+    std::this_thread::yield();
+  std::unique_lock<std::mutex> lock(mutex);
+  // pass data
+  std::this_thread::sleep_for(std::chrono::seconds(1));
+  cv.notify_one();
+}
+
+int main()
+{
+  std::thread thread1(wait_for_data);
+  provide_data();
+  thread1.join();
+  return 0;
+}
+