#include <QCoreApplication>
#include "libunwind.h"
#include <stdio.h>
#include <sys/sysinfo.h>
#include <signal.h>


void show_backtrace (void)
{
	char name[256];
	unw_cursor_t cursor;
	unw_word_t ip, sp, offp;
	unw_context_t uc;

	unw_getcontext(&uc);

	if ( unw_init_local(&cursor, &uc) != 0)
	{
		return;
			}

	while (unw_step(&cursor) > 0)
	{
		char file[256];
		int line = 0;

		name[0] = '\0';
		int iResult = unw_get_proc_name(&cursor, name, 256, &offp);

		if ( iResult != UNW_ESUCCESS )
		{
			return;
		}

		unw_get_reg(&cursor, UNW_REG_IP, &ip);
		unw_get_reg(&cursor, UNW_REG_SP, &sp);

		printf ("%s ip = %lx, sp = %lx\n", name, (long) ip, (long) sp);
	}
}

static sighandler_t sys_signal_add (int sig_nr, sighandler_t signalhandler)
{
	struct sigaction add_sig;

	if (sigaction (sig_nr, NULL, &add_sig) < 0) return SIG_ERR;

	add_sig.sa_handler = signalhandler;
	sigaddset (&add_sig.sa_mask, sig_nr);
	add_sig.sa_flags = SA_RESTART;

	if (sigaction (sig_nr, &add_sig, NULL) < 0) return SIG_ERR;
	return add_sig.sa_handler;
}

static void check_sys_sig ( int sig_nr )
{
	show_backtrace();
	raise (SIGKILL);
}

int main(int argc, char *argv[])
{
	QCoreApplication a(argc, argv);

	sys_signal_add (SIGSEGV, check_sys_sig);

	*(int *)0=0;

	return a.exec();
}