blob: 6ef92fb46c68385c3857027749322fb63f96eb47 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
// RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
#include "test.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) {
barrier_wait(&barrier);
bar1();
return NULL;
}
void *Thread2(void *x) {
bar2();
barrier_wait(&barrier);
return NULL;
}
void StartThread(pthread_t *t, void *(*f)(void*)) {
pthread_create(t, NULL, f, NULL);
}
int main() {
barrier_init(&barrier, 2);
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 T1:
// CHECK-NEXT: #0 foo1{{.*}} {{.*}}simple_stack.c:7{{(:10)?}} ({{.*}})
// CHECK-NEXT: #1 bar1{{.*}} {{.*}}simple_stack.c:12{{(:3)?}} ({{.*}})
// CHECK-NEXT: #2 Thread1{{.*}} {{.*}}simple_stack.c:26{{(:3)?}} ({{.*}})
// CHECK: Previous read of size 4 at {{.*}} by thread T2:
// CHECK-NEXT: #0 foo2{{.*}} {{.*}}simple_stack.c:16{{(:20)?}} ({{.*}})
// CHECK-NEXT: #1 bar2{{.*}} {{.*}}simple_stack.c:21{{(:3)?}} ({{.*}})
// CHECK-NEXT: #2 Thread2{{.*}} {{.*}}simple_stack.c:31{{(:3)?}} ({{.*}})
// CHECK: Thread T1 (tid={{.*}}, running) created by main thread at:
// CHECK-NEXT: #0 pthread_create {{.*}} ({{.*}})
// CHECK-NEXT: #1 StartThread{{.*}} {{.*}}simple_stack.c:37{{(:3)?}} ({{.*}})
// CHECK-NEXT: #2 main{{.*}} {{.*}}simple_stack.c:43{{(:3)?}} ({{.*}})
// CHECK: Thread T2 ({{.*}}) created by main thread at:
// CHECK-NEXT: #0 pthread_create {{.*}} ({{.*}})
// CHECK-NEXT: #1 StartThread{{.*}} {{.*}}simple_stack.c:37{{(:3)?}} ({{.*}})
// CHECK-NEXT: #2 main{{.*}} {{.*}}simple_stack.c:44{{(:3)?}} ({{.*}})
|
