asan_test_utils.h revision 1e172b4bdec57329bf904f063a29f99cddf2d85f 
1//===-- asan_test_utils.h ------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file is a part of AddressSanitizer, an address sanity checker.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef ASAN_TEST_UTILS_H
15#define ASAN_TEST_UTILS_H
16
17// Make the compiler think that something is going on there.
18extern "C" void break_optimization(void *);
19
20// This function returns its parameter but in such a way that compiler
21// can not prove it.
22template<class T>
23__attribute__((noinline))
24static T Ident(T t) {
25  T ret = t;
26  break_optimization(&ret);
27  return ret;
28}
29
30#endif  // ASAN_TEST_UTILS_H
31