1 files changed, 136 insertions, 0 deletions
diff --git a/src/third_party/unwind/dist/tests/Gtest-concurrent.c b/src/third_party/unwind/dist/tests/Gtest-concurrent.c
new file mode 100644
index 00000000000..6f3447fd844
--- /dev/null
+++ b/src/third_party/unwind/dist/tests/Gtest-concurrent.c
@@ -0,0 +1,136 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2005 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+/*  Verify that multi-threaded concurrent unwinding works as expected.  */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "compiler.h"
+
+#include <libunwind.h>
+#include <limits.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#define NTHREADS	128
+
+#define panic(args...)						\
+	do { fprintf (stderr, args); ++nerrors; } while (0)
+
+int verbose;
+int nerrors;
+int got_usr1, got_usr2;
+char *sigusr1_sp;
+
+void
+handler (int sig UNUSED)
+{
+  unw_word_t ip;
+  unw_context_t uc;
+  unw_cursor_t c;
+  int ret;
+
+  unw_getcontext (&uc);
+  unw_init_local (&c, &uc);
+  do
+    {
+      unw_get_reg (&c, UNW_REG_IP, &ip);
+      if (verbose)
+	printf ("%lx: IP=%lx\n", (long) pthread_self (), (unsigned long) ip);
+    }
+  while ((ret = unw_step (&c)) > 0);
+
+  if (ret < 0)
+    panic ("unw_step() returned %d\n", ret);
+}
+
+void *
+worker (void *arg UNUSED)
+{
+  signal (SIGUSR1, handler);
+
+  if (verbose)
+    printf ("sending SIGUSR1\n");
+  pthread_kill (pthread_self (), SIGUSR1);
+  return NULL;
+}
+
+static void
+doit (void)
+{
+  pthread_t th[NTHREADS];
+  pthread_attr_t attr;
+  int i;
+
+  pthread_attr_init (&attr);
+  pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN + 64*1024);
+
+  for (i = 0; i < NTHREADS; ++i)
+    if (pthread_create (th + i, &attr, worker, NULL))
+      {
+	fprintf (stderr, "FAILURE: Failed to create %u threads "
+		 "(after %u threads)\n",
+		 NTHREADS, i);
+	exit (-1);
+      }
+
+  for (i = 0; i < NTHREADS; ++i)
+    pthread_join (th[i], NULL);
+}
+
+int
+main (int argc, char **argv UNUSED)
+{
+  if (argc > 1)
+    verbose = 1;
+
+  if (verbose)
+    printf ("Caching: none\n");
+  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_NONE);
+  doit ();
+
+  if (verbose)
+    printf ("Caching: global\n");
+  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_GLOBAL);
+  doit ();
+
+  if (verbose)
+    printf ("Caching: per-thread\n");
+  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_PER_THREAD);
+  doit ();
+
+  if (nerrors)
+    {
+      fprintf (stderr, "FAILURE: detected %d errors\n", nerrors);
+      exit (-1);
+    }
+
+  if (verbose)
+    printf ("SUCCESS\n");
+  return 0;
+}