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