1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
8 // https://github.com/google/sanitizers/issues/412
10 // MAP_32BIT flag for mmap is supported only for x86_64.
15 // MAP_32BIT doesn't exist on OS X.
16 // UNSUPPORTED: darwin
18 void *Thread(void *ptr) {
20 barrier_wait(&barrier);
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);
33 if ((uintptr_t)ptr >= (1ull << 32)) {
34 fprintf(stderr, "ptr is too high\n");
38 pthread_create(&t, 0, Thread, ptr);
39 barrier_wait(&barrier);
42 munmap(ptr, 128 << 10);
43 fprintf(stderr, "DONE\n");
46 // CHECK: WARNING: ThreadSanitizer: data race