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| // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
| #include <stdio.h>
| #include <stdlib.h>
|
| // Defined by tsan.
| extern "C" FILE *__interceptor_fopen(const char *file, const char *mode);
| extern "C" int __interceptor_fileno(FILE *f);
|
| extern "C" FILE *fopen(const char *file, const char *mode) {
| static int first = 0;
| if (__sync_lock_test_and_set(&first, 1) == 0)
| printf("user fopen\n");
| return __interceptor_fopen(file, mode);
| }
|
| extern "C" int fileno(FILE *f) {
| static int first = 0;
| if (__sync_lock_test_and_set(&first, 1) == 0)
| printf("user fileno\n");
| return 1;
| }
|
| int main() {
| FILE *f = fopen("/dev/zero", "r");
| if (f) {
| char buf;
| fread(&buf, 1, 1, f);
| fclose(f);
| }
| }
|
| // CHECK: user fopen
| // CHECK-NOT: ThreadSanitizer
|
|
