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// RUN: %clang_safestack %s -pthread -o %t
// RUN: %run %t
// Test unsafe stack deallocation with custom stack sizes, in particular ensure
// that we correctly deallocate small stacks and don't accidentally deallocate
// adjacent memory.
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
volatile int step = 0;
void *wait_until(void *ptr) {
while ((int)ptr != step)
usleep(1000);
volatile char buf[64];
buf[0] = 0;
return NULL;
}
int main(int argc, char **argv) {
pthread_t t1, t2, t3;
pthread_attr_t small_stack_attr;
pthread_attr_init(&small_stack_attr);
pthread_attr_setstacksize(&small_stack_attr, 65536);
if (pthread_create(&t3, NULL, wait_until, (void *)3))
abort();
if (pthread_create(&t1, &small_stack_attr, wait_until, (void *)1))
abort();
if (pthread_create(&t2, NULL, wait_until, (void *)2))
abort();
step = 1;
if (pthread_join(t1, NULL))
abort();
step = 2;
if (pthread_join(t2, NULL))
abort();
step = 3;
if (pthread_join(t3, NULL))
abort();
pthread_attr_destroy(&small_stack_attr);
return 0;
}
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