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 6int Global; 7 8void __attribute__((noinline)) foo1() { 9 Global = 42; 10} 11 12void __attribute__((noinline)) bar1() { 13 volatile int tmp = 42; 14 int tmp2 = tmp; 15 (void)tmp2; 16 foo1(); 17} 18 19void __attribute__((noinline)) foo2() { 20 volatile int tmp = Global; 21 int tmp2 = tmp; 22 (void)tmp2; 23} 24 25void __attribute__((noinline)) bar2() { 26 volatile int tmp = 42; 27 int tmp2 = tmp; 28 (void)tmp2; 29 foo2(); 30} 31 32void *Thread1(void *x) { 33 sleep(1); 34 bar1(); 35 return NULL; 36} 37 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