stack trace when program crash


#include <stdio.h>
#include <execinfo.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>

void handler(int sig) {
    void *array[10];
    size_t size;

    // get void*'s for all entries on the stack
    size = backtrace(array, 10);

    // print out all the frames to stderr
    fprintf(stderr, "Error: signal %d:\n", sig);
    backtrace_symbols_fd(array, size, STDERR_FILENO);

void baz() {
    int *foo = (int*)-1; // make a bad pointer
    printf("%d\n", *foo);       // causes segfault

void bar() { baz(); }
void foo() { bar(); }

int main(int argc, char **argv) {
    signal(SIGSEGV, handler);   // install our handler
    foo(); // this will call foo, bar, and baz.  baz segfaults.

Compile and test

[dennis@localhost code]$ gcc -g -rdynamic -o t stacktrace.c
[dennis@localhost code]$ ./t
Error: signal 11: