#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <execinfo.h>
#include <sys/types.h>
#include <sys/ucontext.h>
#include <unistd.h>
#include <sys/ptrace.h>

#define UNW_LOCAL_ONLY
#include <libunwind.h>

void local_backtrace()
{
	unw_cursor_t cursor; unw_context_t uc;
	unw_word_t ip, sp, offset;

	unw_getcontext(&uc);
	unw_init_local(&cursor, &uc);
	char name[1000];

	while (unw_step(&cursor) > 0) {
		unw_get_reg(&cursor, UNW_REG_IP, &ip);
		unw_get_reg(&cursor, UNW_REG_SP, &sp);
		memset(name, 0, sizeof(char) * 1000);
		unw_get_proc_name(&cursor, name, sizeof(char) * 1000, &offset);
		printf ("ip = %lx, sp = %lx offset = %lx name = %s\n", (long) ip, (long) sp, (long) offset, name);
	}
}

void handle_sigsegv(int signal, siginfo_t *info, void *ucontext)
{
	printf("Handler called\n");
	local_backtrace();
	exit(-1);
}


void (*invalid_function)() = (void*)1;
void crash()
{
	invalid_function();
}

int main(int argc, char *argv[])
{
	struct sigaction sa;
	memset(&sa, 0, sizeof(sa));
	sa.sa_sigaction = handle_sigsegv;
	sa.sa_flags = SA_SIGINFO;
	sigaction(SIGSEGV, &sa, NULL);

	crash();

	return 0;
}