1// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
2#include "test.h"
3#include <stdint.h>
4#include <errno.h>
5#include <sys/mman.h>
6
7// Test for issue:
8// https://github.com/google/sanitizers/issues/412
9
10// MAP_32BIT flag for mmap is supported only for x86_64.
11// XFAIL: mips
12// XFAIL: aarch64
13// XFAIL: powerpc64
14
15// MAP_32BIT doesn't exist on OS X and NetBSD.
16// UNSUPPORTED: darwin,netbsd
17
18void *Thread(void *ptr) {
19 *(int*)ptr = 42;
20 barrier_wait(&barrier);
21 return 0;
22}
23
24int main() {
25 barrier_init(&barrier, 2);
26 void *ptr = mmap(0, 128 << 10, PROT_READ|PROT_WRITE,
27 MAP_32BIT|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
28 fprintf(stderr, "ptr=%p\n", ptr);
29 if (ptr == MAP_FAILED) {
30 fprintf(stderr, "mmap failed: %d\n", errno);
31 return 1;
32 }
33 if ((uintptr_t)ptr >= (1ull << 32)) {
34 fprintf(stderr, "ptr is too high\n");
35 return 1;
36 }
37 pthread_t t;
38 pthread_create(&t, 0, Thread, ptr);
39 barrier_wait(&barrier);
40 *(int*)ptr = 42;
41 pthread_join(t, 0);
42 munmap(ptr, 128 << 10);
43 fprintf(stderr, "DONE\n");
44}
45
46// CHECK: WARNING: ThreadSanitizer: data race
47// CHECK: DONE
48