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				// RUN: %clang_safestack %s -pthread -o %t
				// RUN: %run %t

				// Test that pthreads receive their own unsafe stack.

				#include <stdlib.h>
				#include <string.h>
				#include <pthread.h>
				#include "utils.h"

				static int ptr_test = 42;

				void t1_start(void ptr)
				{
				if (ptr != &ptr_test)
				abort();

				// safe stack
				int val = ptr_test * 5;

				// unsafe stack
				char buffer[8096]; // two pages
				memset(buffer, val, sizeof (buffer));
				break_optimization(buffer);

				return ptr;
				}

				int main(int argc, char **argv)
				{
				pthread_t t1;
				void *ptr = NULL;
				if (pthread_create(&t1, NULL, t1_start, &ptr_test))
				abort();
				if (pthread_join(t1, &ptr))
				abort();
				if (ptr != &ptr_test)
				abort();
				return 0;
				}