1 //===-- hwasan_poisoning.cc -------------------------------------*- 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 HWAddressSanitizer.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "hwasan_poisoning.h"
15
16 #include "hwasan_mapping.h"
17 #include "interception/interception.h"
18 #include "sanitizer_common/sanitizer_common.h"
19
20 namespace __hwasan {
21
TagMemoryAligned(uptr p,uptr size,tag_t tag)22 uptr TagMemoryAligned(uptr p, uptr size, tag_t tag) {
23 CHECK(IsAligned(p, kShadowAlignment));
24 CHECK(IsAligned(size, kShadowAlignment));
25 uptr shadow_start = MemToShadow(p);
26 uptr shadow_size = MemToShadowSize(size);
27 internal_memset((void *)shadow_start, tag, shadow_size);
28 return AddTagToPointer(p, tag);
29 }
30
TagMemory(uptr p,uptr size,tag_t tag)31 uptr TagMemory(uptr p, uptr size, tag_t tag) {
32 uptr start = RoundDownTo(p, kShadowAlignment);
33 uptr end = RoundUpTo(p + size, kShadowAlignment);
34 return TagMemoryAligned(start, end - start, tag);
35 }
36
37 } // namespace __hwasan
38