#include <sys/cdefs.h>

#include <err.h>
#include <execinfo.h>
#include <setjmp.h>
#include <signal.h>
#include <stddef.h>
#include <stdio.h>

void (*f)(void);
jmp_buf env;
void *stack[64];
size_t stackdepth;
char **symbols;

void
sigsegv(int signo)
{

	(void)signo;

	stackdepth = backtrace(stack, __arraycount(stack));
	longjmp(env, 1);
}

int
main(void)
{
	size_t i;

	if (signal(SIGSEGV, &sigsegv) == SIG_ERR)
		err(1, "signal(SIGSEGV)");
	if (setjmp(env) == 0)
		(*f)();
	symbols = backtrace_symbols(stack, stackdepth);
	if (symbols == NULL)
		err(1, "backtrace_symbols");
	for (i = 0; i < stackdepth; i++)
		printf("%s\n", symbols[i]);
	fflush(stdout);
	return ferror(stdout);
}