backtrace in application

https://www.gnu.org/software/libc/manual/html_node/Backtraces.html
*** hostapd has good sample too

Function: int backtrace (void **buffer, int size)
Function: char ** backtrace_symbols (void *const *buffer, int size)
Function: void backtrace_symbols_fd (void *const *buffer, int size, int fd)

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

/* Obtain a backtrace and print it to stdout. */
void
print_trace (void)
{
void *array[10];
size_t size;
char **strings;
size_t i;
size = backtrace (array, 10);
strings = backtrace_symbols (array, size);
printf ("Obtained %zd stack frames.\n", size);
for (i = 0; i < size; i++)
printf ("%s\n", strings[i]);
free (strings);
}

/* A dummy function to make the backtrace more interesting. */
void
dummy_function (void)
{
print_trace ();
}

int
main (void)
{
dummy_function ();
return 0;

}