1 #include "test.h"
2 
3 int Global;
4 
5 void __attribute__((noinline)) foo1() {
6   Global = 42;
7 }
8 
9 void __attribute__((noinline)) bar1() {
10   volatile int tmp = 42; (void)tmp;
11   foo1();
12 }
13 
14 void __attribute__((noinline)) foo2() {
15   volatile int v = Global; (void)v;
16 }
17 
18 void __attribute__((noinline)) bar2() {
19   volatile int tmp = 42; (void)tmp;
20   foo2();
21 }
22 
23 void *Thread1(void *x) {
24   barrier_wait(&barrier);
25   bar1();
26   return NULL;
27 }
28 
29 void *Thread2(void *x) {
30   bar2();
31   barrier_wait(&barrier);
32   return NULL;
33 }
34 
35 void __attribute__((noinline)) StartThread(pthread_t *t, void *(*f)(void*)) {
36   pthread_create(t, NULL, f, NULL);
37 }
38 
39 int main() {
40   barrier_init(&barrier, 2);
41   pthread_t t[2];
42   StartThread(&t[0], Thread1);
43   StartThread(&t[1], Thread2);
44   pthread_join(t[0], NULL);
45   pthread_join(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