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

int func2()
{
  const int MAXFRAME = 10;
  void *buffer[MAXFRAME];
  int nframes = backtrace(buffer, MAXFRAME);
  printf("backtrace returned %d frames\n", nframes);
  return nframes;
}

void func1()
{
  int num = func2();
  printf("func2 returned %d\n", num);
  return;
}

int main()
{
  func1();
  return 0;
}