src/tests/sigbus-test.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2009 Lennart Poettering
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as
   8   published by the Free Software Foundation; either version 2.1 of the
   9   License, or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public
  17   License along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <fcntl.h>
  27 #include <sys/mman.h>
  28
  29 #include <pulsecore/memtrap.h>
  30 #include <pulsecore/core-util.h>
  31
  32 int main(int argc, char *argv[]) {
  33     void *p;
  34     int fd;
  35     pa_memtrap *m;
  36
  37     pa_log_set_level(PA_LOG_DEBUG);
  38     pa_memtrap_install();
  39
  40     /* Create the memory map */
  41     pa_assert_se((fd = open("sigbus-test-map", O_RDWR|O_TRUNC|O_CREAT, 0660)) >= 0);
  42     pa_assert_se(unlink("sigbus-test-map") == 0);
  43     pa_assert_se(ftruncate(fd, PA_PAGE_SIZE) >= 0);
  44     pa_assert_se((p = mmap(NULL, PA_PAGE_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) != MAP_FAILED);
  45
  46     /* Register memory map */
  47     m = pa_memtrap_add(p, PA_PAGE_SIZE);
  48
  49     /* Use memory map */
  50     pa_snprintf(p, PA_PAGE_SIZE, "This is a test that should work fine.");
  51
  52     /* Verify memory map */
  53     pa_log("Let's see if this worked: %s", (char*) p);
  54     pa_log("And memtrap says it is good: %s", pa_yes_no(pa_memtrap_is_good(m)));
  55
  56     /* Invalidate mapping */
  57     pa_assert_se(ftruncate(fd, 0) >= 0);
  58
  59     /* Use memory map */
  60     pa_snprintf(p, PA_PAGE_SIZE, "This is a test that should fail but get caught.");
  61
  62     /* Verify memory map */
  63     pa_log("Let's see if this worked: %s", (char*) p);
  64     pa_log("And memtrap says it is good: %s", pa_yes_no(pa_memtrap_is_good(m)));
  65
  66     pa_memtrap_remove(m);
  67     munmap(p, PA_PAGE_SIZE);
  68
  69     return 0;
  70 }