mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-12-25 12:33:42 +01:00
151 lines
3.7 KiB
C
151 lines
3.7 KiB
C
/* 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);
|
|
}
|
|
}
|