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