gby / hacks

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hacks / backtrace.c
100644 69 lines (48 sloc) 0.924 kb
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#include <execinfo.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
 
/**********************************
 * Compile with:
 * gcc bt.c -rdynamic -o bt
 * 
 * Note that you must use the -rdynamic
 * to see function names
 */ 
 
 
/* Obtain a backtrace and print it to stdout. */
void
print_trace (void)
{
  void *array[10];
  size_t size;
  char **strings;
  size_t i;
 
  size = backtrace (array, 10);
  strings = backtrace_symbols (array, size);
 
  printf ("Obtained %zd stack frames.\n", size);
 
  for (i = 0; i < size; i++)
     printf ("%s\n", strings[i]);
 
  free (strings);
}
 
/* The fault handler function */
void
fault_handler (int dummy)
{
  print_trace ();
  exit(-1);
}
 
 
void * dummy_func1(int dummy) {
 
 int * p = NULL;
 
 *p = 1;
  return NULL;
}
 
 
void * dummy_func2(int dummy) {
 
 return dummy_func1(dummy);
}
 
int
main (void)
{
 
  signal(SIGSEGV, fault_handler);
 
  dummy_func2(12);
 
 
  return 0;
}