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memtrap: add new logic to trap and handle SIGBUS

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This commit is contained in:
Lennart Poettering 2009-04-21 21:33:32 +02:00
parent fbbcfae769
commit 6224fac921
5 changed files with 374 additions and 2 deletions
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69
src/tests/sigbus-test.c Normal file
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/***
This file is part of PulseAudio.
Copyright 2009 Lennart Poettering
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <fcntl.h>
#include <sys/mman.h>
#include <pulsecore/memtrap.h>
#include <pulsecore/core-util.h>
int main(int argc, char *argv[]) {
void *p;
int fd;
pa_memtrap *m;
pa_log_set_level(PA_LOG_DEBUG);
/* Create the memory map */
pa_assert_se((fd = open("sigbus-test-map", O_RDWR|O_TRUNC|O_CREAT, 0660)) >= 0);
pa_assert_se(unlink("sigbus-test-map") == 0);
pa_assert_se(ftruncate(fd, PA_PAGE_SIZE) >= 0);
pa_assert_se((p = mmap(NULL, PA_PAGE_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) != MAP_FAILED);
/* Register memory map */
m = pa_memtrap_add(p, PA_PAGE_SIZE);
/* Use memory map */
pa_snprintf(p, PA_PAGE_SIZE, "This is a test that should work fine.");
/* Verify memory map */
pa_log("Let's see if this worked: %s", (char*) p);
pa_log("And memtrap says it is good: %s", pa_yes_no(pa_memtrap_is_good(m)));
/* Invalidate mapping */
pa_assert_se(ftruncate(fd, 0) >= 0);
/* Use memory map */
pa_snprintf(p, PA_PAGE_SIZE, "This is a test that should fail but get caught.");
/* Verify memory map */
pa_log("Let's see if this worked: %s", (char*) p);
pa_log("And memtrap says it is good: %s", pa_yes_no(pa_memtrap_is_good(m)));
pa_memtrap_remove(m);
munmap(p, PA_PAGE_SIZE);
return 0;
}