1 //===-- hwasan_poisoning.cc ---------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file is a part of HWAddressSanitizer.
12 //===----------------------------------------------------------------------===//
14 #include "hwasan_poisoning.h"
16 #include "interception/interception.h"
17 #include "sanitizer_common/sanitizer_common.h"
21 uptr TagMemoryAligned(uptr p, uptr size, tag_t tag) {
22 CHECK(IsAligned(p, kShadowAlignment));
23 CHECK(IsAligned(size, kShadowAlignment));
24 uptr shadow_start = MEM_TO_SHADOW(p);
25 uptr shadow_size = MEM_TO_SHADOW_OFFSET(size);
26 internal_memset((void *)shadow_start, tag, shadow_size);
27 return AddTagToPointer(p, tag);
30 uptr TagMemory(uptr p, uptr size, tag_t tag) {
31 uptr start = RoundDownTo(p, kShadowAlignment);
32 uptr end = RoundUpTo(p + size, kShadowAlignment);
33 return TagMemoryAligned(start, end - start, tag);
36 } // namespace __hwasan