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diff --git a/libstdc++-v3/testsuite/util/testsuite_shared.cc b/libstdc++-v3/testsuite/util/testsuite_shared.cc
new file mode 100644
index 00000000..4999da43
--- /dev/null
+++ b/libstdc++-v3/testsuite/util/testsuite_shared.cc
@@ -0,0 +1,72 @@
+// Copyright (C) 2004, 2005, 2006, 2007, 2009 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 <string>
+#include <stdexcept>
+#include <iostream>
+#include <sstream>
+#include <ext/mt_allocator.h>
+#include <bits/functexcept.h>
+
+// libstdc++/22309
+extern "C" void
+try_allocation()
+{
+  typedef char value_t;
+
+  typedef __gnu_cxx::__mt_alloc<value_t> allocator_t;
+
+  typedef std::char_traits<value_t> traits_t; 
+  typedef std::basic_string<value_t, traits_t, allocator_t> string_t;
+
+  string_t s;
+  s += "west beach, indiana dunes";
+}
+
+// libstdc++/23591
+extern "C" void 
+try_throw_exception()
+{
+  try
+    {
+      std::__throw_bad_exception();
+    }
+  catch (const std::exception& e)
+    { }
+}
+
+extern "C" void 
+try_function_random_fail()
+{
+  long seed = lrand48();
+  if (seed < 2000)
+    seed = 2000;
+
+  {
+    std::ostringstream s;
+    s << "random_throw, seed: " << seed << std::endl;
+    std::cout << s.str();
+  }
+
+  while (--seed > 0)
+    {
+      try_throw_exception();
+    }
+
+  // Randomly throw. See if other threads cleanup.
+  std::__throw_bad_exception();
+}