| // RUN: %clangxx_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s |
| #include <stdio.h> |
| |
| // defined by tsan. |
| extern "C" void *__interceptor_malloc(unsigned long size); |
| extern "C" void __interceptor_free(void *p); |
| |
| extern "C" void *malloc(unsigned long size) { |
| static int first = 0; |
| if (__sync_lock_test_and_set(&first, 1) == 0) |
| printf("user malloc\n"); |
| return __interceptor_malloc(size); |
| } |
| |
| extern "C" void free(void *p) { |
| __interceptor_free(p); |
| } |
| |
| int main() { |
| volatile char *p = (char*)malloc(10); |
| p[0] = 0; |
| free((void*)p); |
| } |
| |
| // CHECK: user malloc |
| // CHECK-NOT: ThreadSanitizer |
| |
