1*7c3d14c8STreehugger Robot //===-- msan_poisoning.h ----------------------------------------*- C++ -*-===// 2*7c3d14c8STreehugger Robot // 3*7c3d14c8STreehugger Robot // The LLVM Compiler Infrastructure 4*7c3d14c8STreehugger Robot // 5*7c3d14c8STreehugger Robot // This file is distributed under the University of Illinois Open Source 6*7c3d14c8STreehugger Robot // License. See LICENSE.TXT for details. 7*7c3d14c8STreehugger Robot // 8*7c3d14c8STreehugger Robot //===----------------------------------------------------------------------===// 9*7c3d14c8STreehugger Robot // 10*7c3d14c8STreehugger Robot // This file is a part of MemorySanitizer. 11*7c3d14c8STreehugger Robot // 12*7c3d14c8STreehugger Robot //===----------------------------------------------------------------------===// 13*7c3d14c8STreehugger Robot 14*7c3d14c8STreehugger Robot #ifndef MSAN_POISONING_H 15*7c3d14c8STreehugger Robot #define MSAN_POISONING_H 16*7c3d14c8STreehugger Robot 17*7c3d14c8STreehugger Robot #include "msan.h" 18*7c3d14c8STreehugger Robot 19*7c3d14c8STreehugger Robot namespace __msan { 20*7c3d14c8STreehugger Robot 21*7c3d14c8STreehugger Robot // Return origin for the first poisoned byte in the memory range, or 0. 22*7c3d14c8STreehugger Robot u32 GetOriginIfPoisoned(uptr addr, uptr size); 23*7c3d14c8STreehugger Robot 24*7c3d14c8STreehugger Robot // Walk [addr, addr+size) app memory region, copying origin tags from the 25*7c3d14c8STreehugger Robot // corresponding positions in [src_origin, src_origin+size) where the 26*7c3d14c8STreehugger Robot // corresponding shadow in [src_shadow, src_shadow+size) is non-zero. 27*7c3d14c8STreehugger Robot void SetOriginIfPoisoned(uptr addr, uptr src_shadow, uptr size, u32 src_origin); 28*7c3d14c8STreehugger Robot 29*7c3d14c8STreehugger Robot // Copy origin from src (app address) to dst (app address), creating chained 30*7c3d14c8STreehugger Robot // origin ids as necessary, without overriding origin for fully initialized 31*7c3d14c8STreehugger Robot // quads. 32*7c3d14c8STreehugger Robot void CopyOrigin(const void *dst, const void *src, uptr size, StackTrace *stack); 33*7c3d14c8STreehugger Robot 34*7c3d14c8STreehugger Robot // memmove() shadow and origin. Dst and src are application addresses. 35*7c3d14c8STreehugger Robot // See CopyOrigin() for the origin copying logic. 36*7c3d14c8STreehugger Robot void MoveShadowAndOrigin(const void *dst, const void *src, uptr size, 37*7c3d14c8STreehugger Robot StackTrace *stack); 38*7c3d14c8STreehugger Robot 39*7c3d14c8STreehugger Robot // memcpy() shadow and origin. Dst and src are application addresses. 40*7c3d14c8STreehugger Robot // See CopyOrigin() for the origin copying logic. 41*7c3d14c8STreehugger Robot void CopyShadowAndOrigin(const void *dst, const void *src, uptr size, 42*7c3d14c8STreehugger Robot StackTrace *stack); 43*7c3d14c8STreehugger Robot 44*7c3d14c8STreehugger Robot // memcpy() app memory, and do "the right thing" to the corresponding shadow and 45*7c3d14c8STreehugger Robot // origin regions. 46*7c3d14c8STreehugger Robot void CopyMemory(void *dst, const void *src, uptr size, StackTrace *stack); 47*7c3d14c8STreehugger Robot 48*7c3d14c8STreehugger Robot // Fill shadow will value. Ptr is an application address. 49*7c3d14c8STreehugger Robot void SetShadow(const void *ptr, uptr size, u8 value); 50*7c3d14c8STreehugger Robot 51*7c3d14c8STreehugger Robot // Set origin for the memory region. 52*7c3d14c8STreehugger Robot void SetOrigin(const void *dst, uptr size, u32 origin); 53*7c3d14c8STreehugger Robot 54*7c3d14c8STreehugger Robot // Mark memory region uninitialized, with origins. 55*7c3d14c8STreehugger Robot void PoisonMemory(const void *dst, uptr size, StackTrace *stack); 56*7c3d14c8STreehugger Robot 57*7c3d14c8STreehugger Robot } // namespace __msan 58*7c3d14c8STreehugger Robot 59*7c3d14c8STreehugger Robot #endif // MSAN_POISONING_H 60