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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
| #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;
}
// RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
// Also check that functions instrumentation can be configured by either driver
// or legacy flags:
// RUN: %clangxx_tsan -O1 %s -o %t -fno-sanitize-thread-func-entry-exit && %deflake %run %t 2>&1 \
// RUN: | FileCheck --check-prefix=CHECK-FUNC-ENTRY-EXIT-OFF %s
// RUN: %clangxx_tsan -O1 %s -o %t -mllvm -tsan-instrument-func-entry-exit=0 && %deflake %run %t 2>&1 \
// RUN: | FileCheck --check-prefix=CHECK-FUNC-ENTRY-EXIT-OFF %s
// CHECK: WARNING: ThreadSanitizer: data race
// CHECK-NEXT: Write of size 4 at {{.*}} by thread T1:
// CHECK-NEXT: #0 foo1{{.*}} {{.*}}simple_stack.c:6{{(:10)?}} ({{.*}})
// CHECK-NEXT: #1 bar1{{.*}} {{.*}}simple_stack.c:11{{(:3)?}} ({{.*}})
// CHECK-NEXT: #2 Thread1{{.*}} {{.*}}simple_stack.c:25{{(:3)?}} ({{.*}})
// CHECK: Previous read of size 4 at {{.*}} by thread T2:
// CHECK-NEXT: #0 foo2{{.*}} {{.*}}simple_stack.c:15{{(:20)?}} ({{.*}})
// CHECK-NEXT: #1 bar2{{.*}} {{.*}}simple_stack.c:20{{(:3)?}} ({{.*}})
// CHECK-NEXT: #2 Thread2{{.*}} {{.*}}simple_stack.c:30{{(:3)?}} ({{.*}})
// CHECK: Thread T1 (tid={{.*}}, running) created by main thread at:
// CHECK-NEXT: #0 pthread_create {{.*}} ({{.*}})
// CHECK-NEXT: #1 StartThread{{.*}} {{.*}}simple_stack.c:36{{(:3)?}} ({{.*}})
// CHECK-NEXT: #2 main{{.*}} {{.*}}simple_stack.c:42{{(:3)?}} ({{.*}})
// CHECK: Thread T2 ({{.*}}) created by main thread at:
// CHECK-NEXT: #0 pthread_create {{.*}} ({{.*}})
// CHECK-NEXT: #1 StartThread{{.*}} {{.*}}simple_stack.c:36{{(:3)?}} ({{.*}})
// CHECK-NEXT: #2 main{{.*}} {{.*}}simple_stack.c:43{{(:3)?}} ({{.*}})
// CHECK-FUNC-ENTRY-EXIT-OFF: WARNING: ThreadSanitizer: data race
// CHECK-FUNC-ENTRY-EXIT-OFF-NEXT: Write of size 4 at {{.*}} by thread T1:
// CHECK-FUNC-ENTRY-EXIT-OFF-NEXT: #0 foo1{{.*}} {{.*}}simple_stack.c:6{{(:10)?}} ({{.*}})
// CHECK-FUNC-ENTRY-EXIT-OFF: Previous read of size 4 at {{.*}} by thread T2:
// CHECK-FUNC-ENTRY-EXIT-OFF-NEXT: #0 foo2{{.*}} {{.*}}simple_stack.c:15{{(:20)?}} ({{.*}})
// CHECK-FUNC-ENTRY-EXIT-OFF: Thread T1 (tid={{.*}}, running) created by main thread at:
// CHECK-FUNC-ENTRY-EXIT-OFF-NEXT: #0 pthread_create {{.*}} ({{.*}})
// CHECK-FUNC-ENTRY-EXIT-OFF: Thread T2 ({{.*}}) created by main thread at:
// CHECK-FUNC-ENTRY-EXIT-OFF-NEXT: #0 pthread_create {{.*}} ({{.*}})
|