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

void myfunc3(void)
{
	int j, nptrs;
#define SIZE 100
	void *buffer[100];
	char **strings;

	nptrs = backtrace(buffer, SIZE);
	printf("backtrace() returned %d addresses\n", nptrs);

	/* The call backtrace_symbols_fd(buffer, nptrs, STDOUT_FILENO)
		would produce similar output to the following: */

	strings = backtrace_symbols(buffer, nptrs);
	if (strings == NULL) {
		perror("backtrace_symbols");
		exit(EXIT_FAILURE);
	}

	for (j = 0; j < nptrs; j++)
		printf("%s\n", strings[j]);

	free(strings);
}

static void myfunc2(void)
{
	myfunc3();
}

void myfunc(int ncalls)
{
	if (ncalls > 1)
		myfunc(ncalls - 1);
	else
		myfunc2();
}

int main(int argc, char *argv[])
{
	if (argc != 2) {
		fprintf(stderr, "%s num-calls\n", argv[0]);
		exit(EXIT_FAILURE);
	}
	myfunc(atoi(argv[1]));
	exit(EXIT_SUCCESS);
}