How to get current stack usage

phuna · 08-11-2005, 03:59 AM

Hi all,
I'm programming in Linux, is there any way to get current stack usage of a thread (it's stack usage, not the stack size), means that how much stack space that all local variables, function return addresses, etc. use at a the moment?
Sorry for my bad English.
Any help would be appreciated.

--
phuna

fouldsy · 08-11-2005, 04:14 AM

What language are you scripting/programming this in? Might help.

phuna · 08-11-2005, 08:19 AM

Thanks for your reply, I'm using C

jim mcnamara · 08-11-2005, 09:19 AM

The only available system call is getrusage().
It may not give you what you need, but it will indicate if you are near to crashing into limits.

phuna · 08-11-2005, 09:25 PM

I've tried getrusage, but it returns zero for stack usage!

Code:

#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#include <stdio.h>

int main()
{
  int a = 0xabcd;
  int b = 0x12345678;
  unsigned short c = 0xff;
  int ret;
  struct rusage usage;

  ret = getrusage(RUSAGE_SELF, &usage);
  if (ret == 0)
    {
      printf("Stack usage: %d\n", usage.ru_isrss);
    }
  else
    {
      printf("Fail to get resource usage!");
    }
}