Registers a signal handler that handles exceptions by outputting the program backtrace. Use with the debug flag to include line numbers.

exception_signal_handler.c

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

/**
 * Outputs the backtrace if the application crashes
 * @param signal The signal that was sent when the application crashed
 */
void exception_signal_handler(int signal) {
    const int num_backtraces = 20;
    void *array[num_backtraces];
    int size = backtrace(array, num_backtraces);

    printf("Unhandled exception: Signal %d, %s\n", signal, strsignal(signal));
    char **err = backtrace_symbols(array, size);
    for (int i = 0; i < size; ++i) {
        printf("%s\n", err[i]);
    }
    exit(1);
}

int main() {
  signal(SIGSEGV, exception_signal_handler); // Invalid memory reference
  *(int*)0=0;
}