#define _GNU_SOURCE
#include <pthread.h>
#include <unistd.h>
#include <stdio.h>

void *start(void *p)
{
	for (;;) pause();
}

void printstack(pthread_attr_t *a)
{
	void *base;
	size_t size;
	pthread_attr_getstack(a, &base, &size);
	printf("%p - %p (%zu)\n", base, (char *)base+size, size);
}

char buf[12345];

int main()
{
	pthread_t td;
	pthread_attr_t a;

	pthread_attr_init(&a);
	pthread_attr_setstack(&a, buf, sizeof buf);
	printf("buf = %p\n", buf);

	pthread_create(&td, &a, start, 0);
	pthread_getattr_np(td, &a);
	printstack(&a);
	pthread_getattr_np(pthread_self(), &a);
	printstack(&a);
}