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//===-- hwasan_poisoning.cc ---------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is a part of HWAddressSanitizer.
//
//===----------------------------------------------------------------------===//
#include "hwasan_poisoning.h"
#include "interception/interception.h"
#include "sanitizer_common/sanitizer_common.h"
namespace __hwasan {
uptr TagMemoryAligned(uptr p, uptr size, tag_t tag) {
CHECK(IsAligned(p, kShadowAlignment));
CHECK(IsAligned(size, kShadowAlignment));
uptr shadow_start = MEM_TO_SHADOW(p);
uptr shadow_size = MEM_TO_SHADOW_OFFSET(size);
internal_memset((void *)shadow_start, tag, shadow_size);
return AddTagToPointer(p, tag);
}
uptr TagMemory(uptr p, uptr size, tag_t tag) {
uptr start = RoundDownTo(p, kShadowAlignment);
uptr end = RoundUpTo(p + size, kShadowAlignment);
return TagMemoryAligned(start, end - start, tag);
}
} // namespace __hwasan
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