1//===-- hwasan_memintrinsics.cpp --------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8///
9/// \file
10/// This file is a part of HWAddressSanitizer and contains HWASAN versions of
11/// memset, memcpy and memmove
12///
13//===----------------------------------------------------------------------===//
14
15#include <string.h>
16#include "hwasan.h"
17#include "hwasan_checks.h"
18#include "hwasan_flags.h"
19#include "hwasan_interface_internal.h"
20#include "sanitizer_common/sanitizer_libc.h"
21
22using namespace __hwasan;
23
24void *__hwasan_memset(void *block, int c, uptr size) {
25 CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
26 p: reinterpret_cast<uptr>(block), sz: size);
27 return memset(s: block, c: c, n: size);
28}
29
30void *__hwasan_memcpy(void *to, const void *from, uptr size) {
31 CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
32 p: reinterpret_cast<uptr>(to), sz: size);
33 CheckAddressSized<ErrorAction::Recover, AccessType::Load>(
34 p: reinterpret_cast<uptr>(from), sz: size);
35 return memcpy(dest: to, src: from, n: size);
36}
37
38void *__hwasan_memmove(void *to, const void *from, uptr size) {
39 CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
40 p: reinterpret_cast<uptr>(to), sz: size);
41 CheckAddressSized<ErrorAction::Recover, AccessType::Load>(
42 p: reinterpret_cast<uptr>(from), sz: size);
43 return memmove(dest: to, src: from, n: size);
44}
45
46void *__hwasan_memset_match_all(void *block, int c, uptr size,
47 u8 match_all_tag) {
48 if (GetTagFromPointer(p: reinterpret_cast<uptr>(block)) != match_all_tag)
49 CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
50 p: reinterpret_cast<uptr>(block), sz: size);
51 return memset(s: block, c: c, n: size);
52}
53
54void *__hwasan_memcpy_match_all(void *to, const void *from, uptr size,
55 u8 match_all_tag) {
56 if (GetTagFromPointer(p: reinterpret_cast<uptr>(to)) != match_all_tag)
57 CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
58 p: reinterpret_cast<uptr>(to), sz: size);
59 if (GetTagFromPointer(p: reinterpret_cast<uptr>(from)) != match_all_tag)
60 CheckAddressSized<ErrorAction::Recover, AccessType::Load>(
61 p: reinterpret_cast<uptr>(from), sz: size);
62 return memcpy(dest: to, src: from, n: size);
63}
64
65void *__hwasan_memmove_match_all(void *to, const void *from, uptr size,
66 u8 match_all_tag) {
67 if (GetTagFromPointer(p: reinterpret_cast<uptr>(to)) != match_all_tag)
68 CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
69 p: reinterpret_cast<uptr>(to), sz: size);
70 if (GetTagFromPointer(p: reinterpret_cast<uptr>(from)) != match_all_tag)
71 CheckAddressSized<ErrorAction::Recover, AccessType::Load>(
72 p: reinterpret_cast<uptr>(from), sz: size);
73 return memmove(dest: to, src: from, n: size);
74}
75

source code of compiler-rt/lib/hwasan/hwasan_memintrinsics.cpp