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
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1 files changed, 131 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/23_containers/list/pthread1.cc b/libstdc++-v3/testsuite/23_containers/list/pthread1.cc
new file mode 100644
index 000000000..00dc817b1
--- /dev/null
+++ b/libstdc++-v3/testsuite/23_containers/list/pthread1.cc
@@ -0,0 +1,131 @@
+// 2002-01-23  Loren J. Rittle <rittle@labs.mot.com> <ljrittle@acm.org>
+//
+// Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010
+// 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 run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-solaris* *-*-cygwin *-*-darwin* alpha*-*-osf* mips-sgi-irix6* } }
+// { dg-options "-pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* alpha*-*-osf* mips-sgi-irix6* } }
+// { dg-options "-pthreads" { target *-*-solaris* } }
+
+// This multi-threading C++/STL/POSIX code adheres to rules outlined here:
+// http://www.sgi.com/tech/stl/thread_safety.html
+//
+// It is believed to exercise the allocation code in a manner that
+// should reveal memory leaks (and, under rare cases, race conditions,
+// if the STL threading support is fubar'd).
+
+#include <list>
+#include <cstdlib>
+#include <pthread.h>
+
+const int thread_cycles = 10;
+const int thread_pairs = 10;
+const unsigned max_size = 100;
+const int iters = 10000;
+
+class task_queue
+{
+  typedef std::list<int> list_type;
+
+public:
+  task_queue ()
+  {
+    pthread_mutex_init (&fooLock, 0);
+    pthread_cond_init (&fooCond1, 0);
+    pthread_cond_init (&fooCond2, 0);
+  }
+  ~task_queue ()
+  {
+    pthread_mutex_destroy (&fooLock);
+    pthread_cond_destroy (&fooCond1);
+    pthread_cond_destroy (&fooCond2);
+  }
+
+  list_type		foo;
+  pthread_mutex_t 	fooLock;
+  pthread_cond_t 	fooCond1;
+  pthread_cond_t 	fooCond2;
+};
+
+void*
+produce(void* t)
+{
+  task_queue& tq = *(static_cast<task_queue*> (t));
+  int num = 0;
+  while (num < iters)
+    {
+      pthread_mutex_lock (&tq.fooLock);
+      while (tq.foo.size () >= max_size)
+	pthread_cond_wait (&tq.fooCond1, &tq.fooLock);
+      tq.foo.push_back (num++);
+      pthread_cond_signal (&tq.fooCond2);
+      pthread_mutex_unlock (&tq.fooLock);
+    }
+  return 0;
+}
+
+void*
+consume(void* t)
+{
+  task_queue& tq = *(static_cast<task_queue*> (t));
+  int num = 0;
+  while (num < iters)
+    {
+      pthread_mutex_lock (&tq.fooLock);
+      while (tq.foo.size () == 0)
+	pthread_cond_wait (&tq.fooCond2, &tq.fooLock);
+      if (tq.foo.front () != num++)
+	abort ();
+      tq.foo.pop_front ();
+      pthread_cond_signal (&tq.fooCond1);
+      pthread_mutex_unlock (&tq.fooLock);
+    }
+  return 0;
+}
+
+int
+main()
+{
+  pthread_t prod[thread_pairs];
+  pthread_t cons[thread_pairs];
+
+  task_queue* tq[thread_pairs];
+
+#if defined(__sun) && defined(__svr4__) && _XOPEN_VERSION >= 500
+  pthread_setconcurrency (thread_pairs * 2);
+#endif
+
+  for (int j = 0; j < thread_cycles; j++)
+    {
+      for (int i = 0; i < thread_pairs; i++)
+	{
+	  tq[i] = new task_queue;
+	  pthread_create (&prod[i], 0, produce, static_cast<void*> (tq[i]));
+	  pthread_create (&cons[i], 0, consume, static_cast<void*> (tq[i]));
+	}
+
+      for (int i = 0; i < thread_pairs; i++)
+	{
+	  pthread_join (prod[i], 0);
+	  pthread_join (cons[i], 0);
+	  delete tq[i];
+	}
+    }
+
+  return 0;
+}