36 lines · cpp
1// RUN: %clangxx_tsan -c -O1 -fno-sanitize=thread %s -o %t.o2// RUN: %clangxx_tsan -O1 %s %t.o -o %t && %run %t 2>&1 | FileCheck %s3 4#include <stdio.h>5#include <stdlib.h>6 7#if !__has_feature(thread_sanitizer)8 9// Defined by tsan.10extern "C" void *__interceptor_malloc(unsigned long size);11extern "C" void __interceptor_free(void *p);12extern "C" void *malloc(unsigned long size) {13 static int first = 0;14 if (__sync_lock_test_and_set(&first, 1) == 0)15 fprintf(stderr, "user malloc\n");16 return __interceptor_malloc(size);17}18 19extern "C" void free(void *p) {20 __interceptor_free(p);21}22 23#else24 25int main() {26 volatile char *p = (char*)malloc(10);27 p[0] = 0;28 free((void*)p);29}30 31#endif32 33// CHECK: user malloc34// CHECK-NOT: ThreadSanitizer35 36