trace.h

// Include at start of main()
#if 0
#include <syslog.h>
#include <stdlib.h>
#include <signal.h>
#include <stdio.h>
#include <execinfo.h>
#endif
// assumes argv[0] is code
{
   void trace(int sig) {
      void *stack[100];
      size_t size;
      size = backtrace(stack, 100);
      fprintf(stderr, "\nSignal: %d\n", sig);
      char *cmd = NULL;
      int e = asprintf(&cmd, "addr2line -f -i -e %s", argv[0]);
      unsigned int i;
      for (i = 2; i < size; i++)
         e += asprintf(&cmd, "%s %p", cmd, stack[i]);
      FILE *al = popen(cmd, "r");
      char buf[1000];
      while (fgets(buf, sizeof(buf), al))
         fprintf(stderr, "%s", buf);
      pclose(al);
      openlog(argv[0], LOG_CONS | LOG_PID, LOG_USER);
      for (i = 2; i < size; i++)
         syslog(LOG_INFO, "%p\n", stack[i]);
      exit(1);
   }
   signal(SIGSEGV, trace);      // install our handler
   signal(SIGILL, trace);       // install our handler
   signal(SIGFPE, trace);       // install our handler
}