| // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s |
| // RUN: %clangxx_tsan -O2 %s -o %t && %run %t 2>&1 | FileCheck %s |
| // RUN: %clangxx_tsan -O3 %s -o %t && %run %t 2>&1 | FileCheck %s |
| // |
| // Check that load widening is not tsan-hostile. |
| #include <pthread.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| struct { |
| int i; |
| char c1, c2, c3, c4; |
| } S; |
| |
| int G; |
| |
| void *Thread1(void *x) { |
| G = S.c1 + S.c3; |
| return NULL; |
| } |
| |
| void *Thread2(void *x) { |
| S.c2 = 1; |
| return NULL; |
| } |
| |
| int main() { |
| pthread_t t[2]; |
| memset(&S, 123, sizeof(S)); |
| pthread_create(&t[0], NULL, Thread1, NULL); |
| pthread_create(&t[1], NULL, Thread2, NULL); |
| pthread_join(t[0], NULL); |
| pthread_join(t[1], NULL); |
| fprintf(stderr, "PASS\n"); |
| } |
| |
| // CHECK-NOT: WARNING: ThreadSanitizer: data race |
| // CHECK: PASS |
