debug/backtrace-tst.c

   1 #include <execinfo.h>
   2 #include <inttypes.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5
   6
   7 static int
   8 compare (const void *p1, const void *p2)
   9 {
  10   void *ba[20];
  11   int n = backtrace (ba, sizeof (ba) / sizeof (ba[0]));
  12   if (n != 0)
  13     {
  14       char **names = backtrace_symbols (ba, n);
  15       if (names != NULL)
  16         {
  17           int i;
  18           printf ("called from %s\n", names[0]);
  19           for (i = 1; i < n; ++i)
  20             printf ("            %s\n", names[i]);
  21           free (names);
  22         }
  23     }
  24
  25   return *(uint32_t *) p1 - *(uint32_t *) p2;
  26 }
  27
  28
  29 int
  30 main (int argc, char *argv[])
  31 {
  32   uint32_t arr[20];
  33   size_t cnt;
  34
  35   for (cnt = 0; cnt < sizeof (arr) / sizeof (arr[0]); ++cnt)
  36     arr[cnt] = random ();
  37
  38   qsort (arr, sizeof (arr) / sizeof (arr[0]), sizeof (arr[0]), compare);
  39
  40   for (cnt = 0; cnt < sizeof (arr) / sizeof (arr[0]); ++cnt)
  41     printf ("%" PRIx32 "\n", arr[cnt]);
  42
  43   return 0;
  44 }