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       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                 :          1 : int main(int argc, char *argv[]) {
      33                 :            :     void *p;
      34                 :            :     int fd;
      35                 :            :     pa_memtrap *m;
      36                 :            : 
      37                 :          1 :     pa_log_set_level(PA_LOG_DEBUG);
      38                 :          1 :     pa_memtrap_install();
      39                 :            : 
      40                 :            :     /* Create the memory map */
      41         [ -  + ]:          1 :     pa_assert_se((fd = open("sigbus-test-map", O_RDWR|O_TRUNC|O_CREAT, 0660)) >= 0);
      42         [ -  + ]:          1 :     pa_assert_se(unlink("sigbus-test-map") == 0);
      43         [ -  + ]:          1 :     pa_assert_se(ftruncate(fd, PA_PAGE_SIZE) >= 0);
      44         [ -  + ]:          1 :     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                 :          1 :     m = pa_memtrap_add(p, PA_PAGE_SIZE);
      48                 :            : 
      49                 :            :     /* Use memory map */
      50                 :          1 :     pa_snprintf(p, PA_PAGE_SIZE, "This is a test that should work fine.");
      51                 :            : 
      52                 :            :     /* Verify memory map */
      53                 :          1 :     pa_log("Let's see if this worked: %s", (char*) p);
      54                 :          2 :     pa_log("And memtrap says it is good: %s", pa_yes_no(pa_memtrap_is_good(m)));
      55                 :            : 
      56                 :            :     /* Invalidate mapping */
      57         [ -  + ]:          1 :     pa_assert_se(ftruncate(fd, 0) >= 0);
      58                 :            : 
      59                 :            :     /* Use memory map */
      60                 :          1 :     pa_snprintf(p, PA_PAGE_SIZE, "This is a test that should fail but get caught.");
      61                 :            : 
      62                 :            :     /* Verify memory map */
      63                 :          1 :     pa_log("Let's see if this worked: %s", (char*) p);
      64                 :          2 :     pa_log("And memtrap says it is good: %s", pa_yes_no(pa_memtrap_is_good(m)));
      65                 :            : 
      66                 :          1 :     pa_memtrap_remove(m);
      67                 :          1 :     munmap(p, PA_PAGE_SIZE);
      68                 :            : 
      69                 :            :     return 0;
      70                 :            : }