1#include "test.h"
2
3int Global;
4
5void __attribute__((noinline)) foo1() {
6 Global = 42;
7}
8
9void __attribute__((noinline)) bar1() {
10 volatile int tmp = 42; (void)tmp;
11 foo1();
12}
13
14void __attribute__((noinline)) foo2() {
15 volatile int v = Global; (void)v;
16}
17
18void __attribute__((noinline)) bar2() {
19 volatile int tmp = 42; (void)tmp;
20 foo2();
21}
22
23void *Thread1(void *x) {
24 barrier_wait(barrier: &barrier);
25 bar1();
26 return NULL;
27}
28
29void *Thread2(void *x) {
30 bar2();
31 barrier_wait(barrier: &barrier);
32 return NULL;
33}
34
35void __attribute__((noinline)) StartThread(pthread_t *t, void *(*f)(void*)) {
36 pthread_create(newthread: t, NULL, start_routine: f, NULL);
37}
38
39int main() {
40 barrier_init(barrier: &barrier, count: 2);
41 pthread_t t[2];
42 StartThread(t: &t[0], f: Thread1);
43 StartThread(t: &t[1], f: Thread2);
44 pthread_join(th: t[0], NULL);
45 pthread_join(th: t[1], NULL);
46 return 0;
47}
48
49// RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
50
51// Also check that functions instrumentation can be configured by either driver
52// or legacy flags:
53
54// RUN: %clangxx_tsan -O1 %s -o %t -fno-sanitize-thread-func-entry-exit && %deflake %run %t 2>&1 \
55// RUN: | FileCheck --check-prefix=CHECK-FUNC-ENTRY-EXIT-OFF %s
56// RUN: %clangxx_tsan -O1 %s -o %t -mllvm -tsan-instrument-func-entry-exit=0 && %deflake %run %t 2>&1 \
57// RUN: | FileCheck --check-prefix=CHECK-FUNC-ENTRY-EXIT-OFF %s
58
59// CHECK: WARNING: ThreadSanitizer: data race
60// CHECK-NEXT: Write of size 4 at {{.*}} by thread T1:
61// CHECK-NEXT: #0 foo1{{.*}} {{.*}}simple_stack.c:6{{(:10)?}} ({{.*}})
62// CHECK-NEXT: #1 bar1{{.*}} {{.*}}simple_stack.c:11{{(:3)?}} ({{.*}})
63// CHECK-NEXT: #2 Thread1{{.*}} {{.*}}simple_stack.c:25{{(:3)?}} ({{.*}})
64// CHECK: Previous read of size 4 at {{.*}} by thread T2:
65// CHECK-NEXT: #0 foo2{{.*}} {{.*}}simple_stack.c:15{{(:20)?}} ({{.*}})
66// CHECK-NEXT: #1 bar2{{.*}} {{.*}}simple_stack.c:20{{(:3)?}} ({{.*}})
67// CHECK-NEXT: #2 Thread2{{.*}} {{.*}}simple_stack.c:30{{(:3)?}} ({{.*}})
68// CHECK: Thread T1 (tid={{.*}}, running) created by main thread at:
69// CHECK-NEXT: #0 pthread_create {{.*}} ({{.*}})
70// CHECK-NEXT: #1 StartThread{{.*}} {{.*}}simple_stack.c:36{{(:3)?}} ({{.*}})
71// CHECK-NEXT: #2 main{{.*}} {{.*}}simple_stack.c:42{{(:3)?}} ({{.*}})
72// CHECK: Thread T2 ({{.*}}) created by main thread at:
73// CHECK-NEXT: #0 pthread_create {{.*}} ({{.*}})
74// CHECK-NEXT: #1 StartThread{{.*}} {{.*}}simple_stack.c:36{{(:3)?}} ({{.*}})
75// CHECK-NEXT: #2 main{{.*}} {{.*}}simple_stack.c:43{{(:3)?}} ({{.*}})
76
77// CHECK-FUNC-ENTRY-EXIT-OFF: WARNING: ThreadSanitizer: data race
78// CHECK-FUNC-ENTRY-EXIT-OFF-NEXT: Write of size 4 at {{.*}} by thread T1:
79// CHECK-FUNC-ENTRY-EXIT-OFF-NEXT: #0 foo1{{.*}} {{.*}}simple_stack.c:6{{(:10)?}} ({{.*}})
80// CHECK-FUNC-ENTRY-EXIT-OFF: Previous read of size 4 at {{.*}} by thread T2:
81// CHECK-FUNC-ENTRY-EXIT-OFF-NEXT: #0 foo2{{.*}} {{.*}}simple_stack.c:15{{(:20)?}} ({{.*}})
82// CHECK-FUNC-ENTRY-EXIT-OFF: Thread T1 (tid={{.*}}, running) created by main thread at:
83// CHECK-FUNC-ENTRY-EXIT-OFF-NEXT: #0 pthread_create {{.*}} ({{.*}})
84// CHECK-FUNC-ENTRY-EXIT-OFF: Thread T2 ({{.*}}) created by main thread at:
85// CHECK-FUNC-ENTRY-EXIT-OFF-NEXT: #0 pthread_create {{.*}} ({{.*}})
86

source code of compiler-rt/test/tsan/simple_stack.c