| #include <pthread.h> |
| #include <stdio.h> |
| #include <unistd.h> |
| |
| int Global; |
| |
| void __attribute__((noinline)) foo1() { |
| Global = 42; |
| } |
| |
| void __attribute__((noinline)) bar1() { |
| volatile int tmp = 42; (void)tmp; |
| foo1(); |
| } |
| |
| void __attribute__((noinline)) foo2() { |
| volatile int v = Global; (void)v; |
| } |
| |
| void __attribute__((noinline)) bar2() { |
| volatile int tmp = 42; (void)tmp; |
| foo2(); |
| } |
| |
| void *Thread1(void *x) { |
| usleep(1000000); |
| bar1(); |
| return NULL; |
| } |
| |
| void *Thread2(void *x) { |
| bar2(); |
| return NULL; |
| } |
| |
| void StartThread(pthread_t *t, void *(*f)(void*)) { |
| pthread_create(t, NULL, f, NULL); |
| } |
| |
| int main() { |
| pthread_t t[2]; |
| StartThread(&t[0], Thread1); |
| StartThread(&t[1], Thread2); |
| pthread_join(t[0], NULL); |
| pthread_join(t[1], NULL); |
| return 0; |
| } |
| |
| // CHECK: WARNING: ThreadSanitizer: data race |
| // CHECK-NEXT: Write of size 4 at {{.*}} by thread 1: |
| // CHECK-NEXT: #0 foo1 {{.*}}simple_stack.c:8{{(:3)?}} ({{.*}}) |
| // CHECK-NEXT: #1 bar1 {{.*}}simple_stack.c:13{{(:3)?}} ({{.*}}) |
| // CHECK-NEXT: #2 Thread1 {{.*}}simple_stack.c:27{{(:3)?}} ({{.*}}) |
| // CHECK-NEXT: Previous read of size 4 at {{.*}} by thread 2: |
| // CHECK-NEXT: #0 foo2 {{.*}}simple_stack.c:17{{(:26)?}} ({{.*}}) |
| // CHECK-NEXT: #1 bar2 {{.*}}simple_stack.c:22{{(:3)?}} ({{.*}}) |
| // CHECK-NEXT: #2 Thread2 {{.*}}simple_stack.c:32{{(:3)?}} ({{.*}}) |
| // CHECK-NEXT: Thread 1 (running) created at: |
| // CHECK-NEXT: #0 pthread_create {{.*}} ({{.*}}) |
| // CHECK-NEXT: #1 StartThread {{.*}}simple_stack.c:37{{(:3)?}} ({{.*}}) |
| // CHECK-NEXT: #2 main {{.*}}simple_stack.c:42{{(:3)?}} ({{.*}}) |
| // CHECK-NEXT: Thread 2 ({{.*}}) created at: |
| // CHECK-NEXT: #0 pthread_create {{.*}} ({{.*}}) |
| // CHECK-NEXT: #1 StartThread {{.*}}simple_stack.c:37{{(:3)?}} ({{.*}}) |
| // CHECK-NEXT: #2 main {{.*}}simple_stack.c:43{{(:3)?}} ({{.*}}) |