Count stack frames

main.c

#include <stdio.h>

int count_stack_frames() {
  void **ebp, **p;
  int count;

  asm(".intel_syntax noprefix");
  asm ("mov %0, ebp;"
       :"=g"(ebp));

  for (p = ebp, count = 0; p; p = (void**)(*p))
    ++count;

  return count;
}

void level3() {
  printf("level3() :: %d\n", count_stack_frames());
}

void level2() {
  printf("level2() :: %d\n", count_stack_frames());
  level3();
}

void level1() {
  printf("level1() :: %d\n", count_stack_frames());
  level2();
}

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

  printf("main() :: %d\n", count_stack_frames());

  level1();

  return 0;
}

Makefile

program: main.c
  gcc -Wall -O0 -masm=intel -m32 -g -o program main.c

out.txt

main() :: 2
level1() :: 3
level2() :: 4
level3() :: 5