1//===-- msan_poisoning.h ----------------------------------------*- 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// This file is a part of MemorySanitizer. 10// 11//===----------------------------------------------------------------------===// 12 13#ifndef MSAN_POISONING_H 14#define MSAN_POISONING_H 15 16#include "msan.h" 17 18namespace __msan { 19 20// Return origin for the first poisoned byte in the memory range, or 0. 21u32 GetOriginIfPoisoned(uptr addr, uptr size); 22 23// Walk [addr, addr+size) app memory region, copying origin tags from the 24// corresponding positions in [src_origin, src_origin+size) where the 25// corresponding shadow in [src_shadow, src_shadow+size) is non-zero. 26void SetOriginIfPoisoned(uptr addr, uptr src_shadow, uptr size, u32 src_origin); 27 28// Copy origin from src (app address) to dst (app address), creating chained 29// origin ids as necessary, without overriding origin for fully initialized 30// quads. 31void CopyOrigin(const void *dst, const void *src, uptr size, StackTrace *stack); 32 33// memmove() shadow and origin. Dst and src are application addresses. 34// See CopyOrigin() for the origin copying logic. 35void MoveShadowAndOrigin(const void *dst, const void *src, uptr size, 36 StackTrace *stack); 37 38// memcpy() shadow and origin. Dst and src are application addresses. 39// See CopyOrigin() for the origin copying logic. 40void CopyShadowAndOrigin(const void *dst, const void *src, uptr size, 41 StackTrace *stack); 42 43// memcpy() app memory, and do "the right thing" to the corresponding shadow and 44// origin regions. 45void CopyMemory(void *dst, const void *src, uptr size, StackTrace *stack); 46 47// Fill shadow will value. Ptr is an application address. 48void SetShadow(const void *ptr, uptr size, u8 value); 49 50// Set origin for the memory region. 51void SetOrigin(const void *dst, uptr size, u32 origin); 52 53// Mark memory region uninitialized, with origins. 54void PoisonMemory(const void *dst, uptr size, StackTrace *stack); 55 56} // namespace __msan 57 58#endif // MSAN_POISONING_H 59