// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s #include #include #include #include #include #include #include // Test for issue: // https://code.google.com/p/thread-sanitizer/issues/detail?id=5 void *Thread(void *ptr) { *(int*)ptr = 42; return 0; } int main() { void *ptr = mmap(0, 128 << 10, PROT_READ|PROT_WRITE, MAP_32BIT|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); fprintf(stderr, "ptr=%p\n", ptr); if (ptr == MAP_FAILED) { fprintf(stderr, "mmap failed: %d\n", errno); return 1; } if ((uintptr_t)ptr >= (1ull << 32)) { fprintf(stderr, "ptr is too high\n"); return 1; } pthread_t t; pthread_create(&t, 0, Thread, ptr); sleep(1); *(int*)ptr = 42; pthread_join(t, 0); munmap(ptr, 128 << 10); fprintf(stderr, "DONE\n"); } // CHECK: WARNING: ThreadSanitizer: data race // CHECK: DONE