view a stack trace in C

Makefile

CFLAGS=-g
LDFLAGS=-lunwind -lunwind-x86_64
all: stacktrace

stacktrace.c

#include <stdio.h>
#include <stdlib.h>
#include <libunwind.h>

void show_backtrace(void)
{
        unw_context_t uc;    unw_getcontext(&uc);
        unw_cursor_t cursor; unw_init_local(&cursor, &uc);
        unw_word_t offp;
        char proc_name[1024];

        while (unw_step(&cursor) > 0)
                if (!unw_get_proc_name(&cursor, proc_name, 1024, &offp))
                        puts(proc_name);
}

int main()
{
    show_backtrace();
}