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 19 namespace __msan { 20 21 // Return origin for the first poisoned byte in the memory range, or 0. 22 u32 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. 27 void 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. 32 void 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. 36 void 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. 41 void 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. 46 void CopyMemory(void *dst, const void *src, uptr size, StackTrace *stack); 47 48 // Fill shadow will value. Ptr is an application address. 49 void SetShadow(const void *ptr, uptr size, u8 value); 50 51 // Set origin for the memory region. 52 void SetOrigin(const void *dst, uptr size, u32 origin); 53 54 // Mark memory region uninitialized, with origins. 55 void PoisonMemory(const void *dst, uptr size, StackTrace *stack); 56 57 } // namespace __msan 58 59 #endif // MSAN_POISONING_H 60
