(Logical change 1.204)
diff --git a/tests/test-async-sig.c b/tests/test-async-sig.c
index e69de29..a114bff 100644
--- a/tests/test-async-sig.c
+++ b/tests/test-async-sig.c
@@ -0,0 +1,151 @@
+/* libunwind - a platform-independent unwind library
+ Copyright (C) 2004 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. */
+
+/* Check whether basic unwinding truly is async-signal safe. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/time.h>
+
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+
+struct itimerval interval =
+ {
+ .it_interval = { .tv_sec = 0, .tv_usec = 0 },
+ .it_value = { .tv_sec = 0, .tv_usec = 1000 }
+ };
+
+int verbose;
+int nerrors;
+int sigcount;
+
+#define panic(args...) \
+ { ++nerrors; fprintf (stderr, args); return; }
+
+static void
+do_backtrace (int may_print, int get_proc_name)
+{
+ char buf[512], name[256];
+ unw_cursor_t cursor;
+ unw_word_t ip, sp, off;
+ unw_context_t uc;
+ int ret;
+
+ unw_getcontext (&uc);
+ if (unw_init_local (&cursor, &uc) < 0)
+ panic ("unw_init_local failed!\n");
+
+ do
+ {
+ unw_get_reg (&cursor, UNW_REG_IP, &ip);
+ unw_get_reg (&cursor, UNW_REG_SP, &sp);
+
+ buf[0] = '\0';
+ if (get_proc_name || (may_print && verbose))
+ {
+ if (unw_get_proc_name (&cursor, name, sizeof (name), &off) == 0)
+ {
+ if (off)
+ snprintf (buf, sizeof (buf), "<%s+0x%lx>", name, (long) off);
+ else
+ {
+ size_t len = strlen (name);
+ buf[0] = '<';
+ memcpy (buf + 1, name, len);
+ buf[len + 1] = '>';
+ buf[len + 2] = '\0';
+ }
+ }
+ }
+
+ if (may_print && verbose)
+ printf ("%016lx %-32s (sp=%016lx)\n", (long) ip, buf, (long) sp);
+
+ ret = unw_step (&cursor);
+ if (ret < 0)
+ {
+ unw_get_reg (&cursor, UNW_REG_IP, &ip);
+ panic ("FAILURE: unw_step() returned %d for ip=%lx\n",
+ ret, (long) ip);
+ }
+ }
+ while (ret > 0);
+}
+
+void
+sighandler (int signal)
+{
+ if (verbose)
+ printf ("sighandler(signal=%d, count=%d)\n", signal, sigcount);
+
+ do_backtrace (1, 1);
+
+ ++sigcount;
+
+ if (sigcount == 100)
+ unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_GLOBAL);
+ else if (sigcount == 200)
+ unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_PER_THREAD);
+ else if (sigcount == 300)
+ {
+ if (nerrors)
+ {
+ fprintf (stderr, "FAILURE: detected %d errors\n", nerrors);
+ exit (-1);
+ }
+ if (verbose)
+ printf ("SUCCESS.\n");
+ exit (0);
+ }
+ setitimer (ITIMER_VIRTUAL, &interval, NULL);
+}
+
+int
+main (int argc, char **argv)
+{
+ struct sigaction act;
+ long i = 0;
+
+ if (argc > 1)
+ verbose = 1;
+
+ unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_NONE);
+
+ memset (&act, 0, sizeof (act));
+ act.sa_handler = sighandler;
+ act.sa_flags = SA_SIGINFO;
+ sigaction (SIGVTALRM, &act, NULL);
+
+ setitimer (ITIMER_VIRTUAL, &interval, NULL);
+
+ while (1)
+ {
+ if (0 && verbose)
+ printf ("%s: starting backtrace\n", __FUNCTION__);
+ do_backtrace (0, (i++ % 100) == 0);
+ }
+}