1 // RUN: %clangxx_tsan -O1 %s -o %t && not %t 2>&1 | FileCheck %s 2 #include <pthread.h> 3 #include <stdio.h> 4 #include <unistd.h> 5 6 int Global; 7 foo1()8void __attribute__((noinline)) foo1() { 9 Global = 42; 10 } 11 bar1()12void __attribute__((noinline)) bar1() { 13 volatile int tmp = 42; 14 int tmp2 = tmp; 15 (void)tmp2; 16 foo1(); 17 } 18 foo2()19void __attribute__((noinline)) foo2() { 20 volatile int tmp = Global; 21 int tmp2 = tmp; 22 (void)tmp2; 23 } 24 bar2()25void __attribute__((noinline)) bar2() { 26 volatile int tmp = 42; 27 int tmp2 = tmp; 28 (void)tmp2; 29 foo2(); 30 } 31 Thread1(void * x)32void *Thread1(void *x) { 33 sleep(1); 34 bar1(); 35 return NULL; 36 } 37 main()38int main() { 39 pthread_t t; 40 pthread_create(&t, NULL, Thread1, NULL); 41 bar2(); 42 pthread_join(t, NULL); 43 } 44 45 // CHECK: WARNING: ThreadSanitizer: data race 46 // CHECK-NEXT: Write of size 4 at {{.*}} by thread T1: 47 // CHECK-NEXT: #0 foo1{{.*}} {{.*}}simple_stack2.cc:9{{(:3)?}} ({{.*}}) 48 // CHECK-NEXT: #1 bar1{{.*}} {{.*}}simple_stack2.cc:16{{(:3)?}} ({{.*}}) 49 // CHECK-NEXT: #2 Thread1{{.*}} {{.*}}simple_stack2.cc:34{{(:3)?}} ({{.*}}) 50 // CHECK: Previous read of size 4 at {{.*}} by main thread: 51 // CHECK-NEXT: #0 foo2{{.*}} {{.*}}simple_stack2.cc:20{{(:28)?}} ({{.*}}) 52 // CHECK-NEXT: #1 bar2{{.*}} {{.*}}simple_stack2.cc:29{{(:3)?}} ({{.*}}) 53 // CHECK-NEXT: #2 main{{.*}} {{.*}}simple_stack2.cc:41{{(:3)?}} ({{.*}}) 54