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Commit | Line | Data |
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1a4d82fc JJ |
1 | // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s |
2 | #include <stdio.h> | |
3 | #include <stdlib.h> | |
4 | ||
92a42be0 | 5 | // Defined by tsan. |
1a4d82fc JJ |
6 | extern "C" FILE *__interceptor_fopen(const char *file, const char *mode); |
7 | extern "C" int __interceptor_fileno(FILE *f); | |
8 | ||
9 | extern "C" FILE *fopen(const char *file, const char *mode) { | |
10 | static int first = 0; | |
11 | if (__sync_lock_test_and_set(&first, 1) == 0) | |
12 | printf("user fopen\n"); | |
13 | return __interceptor_fopen(file, mode); | |
14 | } | |
15 | ||
16 | extern "C" int fileno(FILE *f) { | |
17 | static int first = 0; | |
18 | if (__sync_lock_test_and_set(&first, 1) == 0) | |
19 | printf("user fileno\n"); | |
20 | return 1; | |
21 | } | |
22 | ||
23 | int main() { | |
24 | FILE *f = fopen("/dev/zero", "r"); | |
25 | if (f) { | |
26 | char buf; | |
27 | fread(&buf, 1, 1, f); | |
28 | fclose(f); | |
29 | } | |
30 | } | |
31 | ||
32 | // CHECK: user fopen | |
33 | // CHECK-NOT: ThreadSanitizer | |
34 |