msan_poisoning.h revision 278497 
1//===-- msan_poisoning.h ----------------------------------------*- 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 MemorySanitizer.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef MSAN_POISONING_H
15#define MSAN_POISONING_H
16
17#include "msan.h"
18
19namespace __msan {
20
21// Return origin for the first poisoned byte in the memory range, or 0.
22u32 GetOriginIfPoisoned(uptr addr, uptr size);
23
24// Walk [addr, addr+size) app memory region, copying origin tags from the
25// corresponding positions in [src_origin, src_origin+size) where the
26// corresponding shadow in [src_shadow, src_shadow+size) is non-zero.
27void SetOriginIfPoisoned(uptr addr, uptr src_shadow, uptr size, u32 src_origin);
28
29// Copy origin from src (app address) to dst (app address), creating chained
30// origin ids as necessary, without overriding origin for fully initialized
31// quads.
32void CopyOrigin(const void *dst, const void *src, uptr size, StackTrace *stack);
33
34// memmove() shadow and origin. Dst and src are application addresses.
35// See CopyOrigin() for the origin copying logic.
36void MoveShadowAndOrigin(const void *dst, const void *src, uptr size,
37                         StackTrace *stack);
38
39// memcpy() shadow and origin. Dst and src are application addresses.
40// See CopyOrigin() for the origin copying logic.
41void CopyShadowAndOrigin(const void *dst, const void *src, uptr size,
42                         StackTrace *stack);
43
44// memcpy() app memory, and do "the right thing" to the corresponding shadow and
45// origin regions.
46void CopyMemory(void *dst, const void *src, uptr size, StackTrace *stack);
47
48// Fill shadow will value. Ptr is an application address.
49void SetShadow(const void *ptr, uptr size, u8 value);
50
51// Set origin for the memory region.
52void SetOrigin(const void *dst, uptr size, u32 origin);
53
54// Mark memory region uninitialized, with origins.
55void PoisonMemory(const void *dst, uptr size, StackTrace *stack);
56
57}  // namespace __msan
58
59#endif  // MSAN_POISONING_H
60