sanitizer_test_utils.h revision f7f2e431263cc0aa321218ce8978b289187a39a3 
1//===-- sanitizer_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 *Sanitizer runtime.
11// Common unit tests utilities.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef SANITIZER_TEST_UTILS_H
16#define SANITIZER_TEST_UTILS_H
17
18#if defined(_WIN32)
19typedef unsigned __int8  uint8_t;
20typedef unsigned __int16 uint16_t;
21typedef unsigned __int32 uint32_t;
22typedef unsigned __int64 uint64_t;
23typedef __int8           int8_t;
24typedef __int16          int16_t;
25typedef __int32          int32_t;
26typedef __int64          int64_t;
27# define NOINLINE __declspec(noinline)
28# define USED
29#else  // defined(_WIN32)
30# define NOINLINE __attribute__((noinline))
31# define USED __attribute__((used))
32#include <stdint.h>
33#endif  // defined(_WIN32)
34
35#if !defined(__has_feature)
36#define __has_feature(x) 0
37#endif
38
39#ifndef ATTRIBUTE_NO_SANITIZE_ADDRESS
40# if __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
41#  define ATTRIBUTE_NO_SANITIZE_ADDRESS \
42    __attribute__((no_sanitize_address))
43# else
44#  define ATTRIBUTE_NO_SANITIZE_ADDRESS
45# endif
46#endif  // ATTRIBUTE_NO_SANITIZE_ADDRESS
47
48#if __LP64__ || defined(_WIN64)
49#  define SANITIZER_WORDSIZE 64
50#else
51#  define SANITIZER_WORDSIZE 32
52#endif
53
54// Make the compiler thinks that something is going on there.
55inline void break_optimization(void *arg) {
56  __asm__ __volatile__("" : : "r" (arg) : "memory");
57}
58
59// This function returns its parameter but in such a way that compiler
60// can not prove it.
61template<class T>
62NOINLINE
63static T Ident(T t) {
64  T ret = t;
65  break_optimization(&ret);
66  return ret;
67}
68
69// Simple stand-alone pseudorandom number generator.
70// Current algorithm is ANSI C linear congruential PRNG.
71static inline uint32_t my_rand_r(uint32_t* state) {
72  return (*state = *state * 1103515245 + 12345) >> 16;
73}
74
75static uint32_t global_seed = 0;
76
77static inline uint32_t my_rand() {
78  return my_rand_r(&global_seed);
79}
80
81
82#endif  // SANITIZER_TEST_UTILS_H
83