1/* libunwind - a platform-independent unwind library
2   Copyright (C) 2003-2005 Hewlett-Packard Co
3	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
4
5Permission is hereby granted, free of charge, to any person obtaining
6a copy of this software and associated documentation files (the
7"Software"), to deal in the Software without restriction, including
8without limitation the rights to use, copy, modify, merge, publish,
9distribute, sublicense, and/or sell copies of the Software, and to
10permit persons to whom the Software is furnished to do so, subject to
11the following conditions:
12
13The above copyright notice and this permission notice shall be
14included in all copies or substantial portions of the Software.
15
16THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
23
24/*  Verify that multi-threaded concurrent unwinding works as expected.  */
25
26#ifdef HAVE_CONFIG_H
27# include "config.h"
28#endif
29
30#include "compiler.h"
31
32#include <libunwind.h>
33#include <limits.h>
34#include <pthread.h>
35#include <signal.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <unistd.h>
39
40#define NTHREADS	128
41
42#define panic(args...)						\
43	do { fprintf (stderr, args); ++nerrors; } while (0)
44
45int verbose;
46int nerrors;
47int got_usr1, got_usr2;
48char *sigusr1_sp;
49
50void
51handler (int sig UNUSED)
52{
53  unw_word_t ip;
54  unw_context_t uc;
55  unw_cursor_t c;
56  int ret;
57
58  unw_getcontext (&uc);
59  unw_init_local (&c, &uc);
60  do
61    {
62      unw_get_reg (&c, UNW_REG_IP, &ip);
63      if (verbose)
64	printf ("%lx: IP=%lx\n", (long) pthread_self (), (unsigned long) ip);
65    }
66  while ((ret = unw_step (&c)) > 0);
67
68  if (ret < 0)
69    panic ("unw_step() returned %d\n", ret);
70}
71
72void *
73worker (void *arg UNUSED)
74{
75  signal (SIGUSR1, handler);
76
77  if (verbose)
78    printf ("sending SIGUSR1\n");
79  pthread_kill (pthread_self (), SIGUSR1);
80  return NULL;
81}
82
83static void
84doit (void)
85{
86  pthread_t th[NTHREADS];
87  pthread_attr_t attr;
88  int i;
89
90  pthread_attr_init (&attr);
91  pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN + 64*1024);
92
93  for (i = 0; i < NTHREADS; ++i)
94    if (pthread_create (th + i, &attr, worker, NULL))
95      {
96	fprintf (stderr, "FAILURE: Failed to create %u threads "
97		 "(after %u threads)\n",
98		 NTHREADS, i);
99	exit (-1);
100      }
101
102  for (i = 0; i < NTHREADS; ++i)
103    pthread_join (th[i], NULL);
104}
105
106int
107main (int argc, char **argv UNUSED)
108{
109  if (argc > 1)
110    verbose = 1;
111
112  if (verbose)
113    printf ("Caching: none\n");
114  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_NONE);
115  doit ();
116
117  if (verbose)
118    printf ("Caching: global\n");
119  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_GLOBAL);
120  doit ();
121
122  if (verbose)
123    printf ("Caching: per-thread\n");
124  unw_set_caching_policy (unw_local_addr_space, UNW_CACHE_PER_THREAD);
125  doit ();
126
127  if (nerrors)
128    {
129      fprintf (stderr, "FAILURE: detected %d errors\n", nerrors);
130      exit (-1);
131    }
132
133  if (verbose)
134    printf ("SUCCESS\n");
135  return 0;
136}
137