51 lines · cpp
1// RUN: %clangxx_tsan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s2#include "test.h"3 4int Global;5volatile int x;6const int kSize = 64 << 10;7volatile long data[kSize];8 9void __attribute__((noinline)) foo() {10 for (int i = 0; i < kSize; i++)11 data[i]++;12}13 14void *Thread(void *a) {15 __atomic_store_n(&x, 1, __ATOMIC_RELEASE);16 foo();17 data[0]++;18 if (a != 0)19 barrier_wait(&barrier);20 return 0;21}22 23int main() {24 barrier_init(&barrier, 2);25 for (int i = 0; i < 50; i++) {26 pthread_t t;27 pthread_create(&t, 0, Thread, 0);28 pthread_join(t, 0);29 }30 pthread_t t;31 pthread_create(&t, 0, Thread, (void*)1);32 barrier_wait(&barrier);33 for (int i = 0; i < kSize; i++)34 data[i]++;35 pthread_join(t, 0);36 fprintf(stderr, "DONE\n");37 return 0;38}39 40// Previously this test produced bogus stack traces like:41// Previous write of size 8 at 0x0000006a8ff8 by thread T17:42// #0 foo() restore_stack.cpp:13:5 (restore_stack.cpp.exe+0x00000040622c)43// #1 Thread(void*) restore_stack.cpp:18:3 (restore_stack.cpp.exe+0x000000406283)44// #2 __tsan_thread_start_func rtl/tsan_interceptors.cpp:886 (restore_stack.cpp.exe+0x00000040a749)45// #3 Thread(void*) restore_stack.cpp:18:3 (restore_stack.cpp.exe+0x000000406283)46 47// CHECK: WARNING: ThreadSanitizer: data race48// CHECK-NOT: __tsan_thread_start_func49// CHECK-NOT: #3 Thread50// CHECK: DONE51