1 // RUN: %clangxx_tsan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s 2 #include "test.h" 3 4 int Global; 5 volatile int x; 6 const int kSize = 64 << 10; 7 volatile long data[kSize]; 8 9 void __attribute__((noinline)) foo() { 10 for (int i = 0; i < kSize; i++) 11 data[i]++; 12 } 13 14 void *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 23 int 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.cc:13:5 (restore_stack.cc.exe+0x00000040622c) 43 // #1 Thread(void*) restore_stack.cc:18:3 (restore_stack.cc.exe+0x000000406283) 44 // #2 __tsan_thread_start_func rtl/tsan_interceptors.cc:886 (restore_stack.cc.exe+0x00000040a749) 45 // #3 Thread(void*) restore_stack.cc:18:3 (restore_stack.cc.exe+0x000000406283) 46 47 // CHECK: WARNING: ThreadSanitizer: data race 48 // CHECK-NOT: __tsan_thread_start_func 49 // CHECK-NOT: #3 Thread 50 // CHECK: DONE 51
