mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-18 05:47:39 +01:00
128 lines
3.2 KiB
C
128 lines
3.2 KiB
C
/* libunwind - a platform-independent unwind library
|
|
Copyright (C) 2003 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 unw_resume() restores the signal mask at proper time. */
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <libunwind.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#ifdef HAVE_IA64INTRIN_H
|
|
# include <ia64intrin.h>
|
|
#endif
|
|
|
|
#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)
|
|
{
|
|
unw_word_t ip;
|
|
sigset_t mask;
|
|
unw_context_t uc;
|
|
unw_cursor_t c;
|
|
char foo;
|
|
|
|
#if UNW_TARGET_IA64
|
|
# ifdef __ECC
|
|
void *bsp = (void *) __getReg(_IA64_REG_AR_BSP);
|
|
# else
|
|
void *bsp = __builtin_ia64_bsp ();
|
|
#endif
|
|
if (verbose)
|
|
printf ("bsp = %p\n", bsp);
|
|
#endif
|
|
|
|
if (verbose)
|
|
printf ("got signal %d\n", sig);
|
|
|
|
if (sig == SIGUSR1)
|
|
{
|
|
++got_usr1;
|
|
sigusr1_sp = &foo;
|
|
|
|
sigemptyset (&mask);
|
|
sigaddset (&mask, SIGUSR2);
|
|
sigprocmask (SIG_BLOCK, &mask, NULL);
|
|
kill (getpid (), SIGUSR2); /* pend SIGUSR2 */
|
|
|
|
signal (SIGUSR1, SIG_IGN);
|
|
signal (SIGUSR2, handler);
|
|
|
|
unw_getcontext(&uc);
|
|
unw_init_local(&c, &uc);
|
|
unw_step(&c); /* step to signal trampoline */
|
|
unw_step(&c); /* step to signaller frame (main ()) */
|
|
unw_get_reg(&c, UNW_REG_IP, &ip);
|
|
if (verbose)
|
|
printf ("resuming at 0x%lx, with SIGUSR2 pending\n",
|
|
(unsigned long) ip);
|
|
unw_resume(&c);
|
|
}
|
|
else if (sig == SIGUSR2)
|
|
{
|
|
++got_usr2;
|
|
if (got_usr1)
|
|
{
|
|
if (sigusr1_sp != &foo)
|
|
panic ("Stack pointer changed from %p to %p between signals\n",
|
|
sigusr1_sp, &foo);
|
|
else if (verbose)
|
|
printf ("OK: stack still at %p\n", &foo);
|
|
}
|
|
signal (SIGUSR2, SIG_IGN);
|
|
}
|
|
else
|
|
panic ("Got unexpected signal %d\n", sig);
|
|
}
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
if (argc > 1)
|
|
verbose = 1;
|
|
|
|
signal (SIGUSR1, handler);
|
|
|
|
if (verbose)
|
|
printf ("sending SIGUSR1\n");
|
|
kill (getpid (), SIGUSR1);
|
|
|
|
if (nerrors)
|
|
fprintf (stderr, "FAILURE: detected %d errors\n", nerrors);
|
|
|
|
if (verbose)
|
|
printf ("SUCCESS\n");
|
|
return 0;
|
|
}
|