1229109Sed//===-- asan_mapping.h ------------------------------------------*- C++ -*-===// 2229109Sed// 3353358Sdim// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4353358Sdim// See https://llvm.org/LICENSE.txt for license information. 5353358Sdim// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6229109Sed// 7229109Sed//===----------------------------------------------------------------------===// 8229109Sed// 9229109Sed// This file is a part of AddressSanitizer, an address sanity checker. 10229109Sed// 11229109Sed// Defines ASan memory mapping. 12229109Sed//===----------------------------------------------------------------------===// 13229109Sed#ifndef ASAN_MAPPING_H 14229109Sed#define ASAN_MAPPING_H 15229109Sed 16229109Sed#include "asan_internal.h" 17229109Sed 18229109Sed// The full explanation of the memory mapping could be found here: 19296417Sdim// https://github.com/google/sanitizers/wiki/AddressSanitizerAlgorithm 20251034Sed// 21251034Sed// Typical shadow mapping on Linux/x86_64 with SHADOW_OFFSET == 0x00007fff8000: 22251034Sed// || `[0x10007fff8000, 0x7fffffffffff]` || HighMem || 23251034Sed// || `[0x02008fff7000, 0x10007fff7fff]` || HighShadow || 24251034Sed// || `[0x00008fff7000, 0x02008fff6fff]` || ShadowGap || 25251034Sed// || `[0x00007fff8000, 0x00008fff6fff]` || LowShadow || 26251034Sed// || `[0x000000000000, 0x00007fff7fff]` || LowMem || 27251034Sed// 28251034Sed// When SHADOW_OFFSET is zero (-pie): 29251034Sed// || `[0x100000000000, 0x7fffffffffff]` || HighMem || 30251034Sed// || `[0x020000000000, 0x0fffffffffff]` || HighShadow || 31251034Sed// || `[0x000000040000, 0x01ffffffffff]` || ShadowGap || 32251034Sed// 33251034Sed// Special case when something is already mapped between 34251034Sed// 0x003000000000 and 0x005000000000 (e.g. when prelink is installed): 35251034Sed// || `[0x10007fff8000, 0x7fffffffffff]` || HighMem || 36251034Sed// || `[0x02008fff7000, 0x10007fff7fff]` || HighShadow || 37251034Sed// || `[0x005000000000, 0x02008fff6fff]` || ShadowGap3 || 38251034Sed// || `[0x003000000000, 0x004fffffffff]` || MidMem || 39251034Sed// || `[0x000a7fff8000, 0x002fffffffff]` || ShadowGap2 || 40251034Sed// || `[0x00067fff8000, 0x000a7fff7fff]` || MidShadow || 41251034Sed// || `[0x00008fff7000, 0x00067fff7fff]` || ShadowGap || 42251034Sed// || `[0x00007fff8000, 0x00008fff6fff]` || LowShadow || 43251034Sed// || `[0x000000000000, 0x00007fff7fff]` || LowMem || 44251034Sed// 45276789Sdim// Default Linux/i386 mapping on x86_64 machine: 46251034Sed// || `[0x40000000, 0xffffffff]` || HighMem || 47251034Sed// || `[0x28000000, 0x3fffffff]` || HighShadow || 48251034Sed// || `[0x24000000, 0x27ffffff]` || ShadowGap || 49251034Sed// || `[0x20000000, 0x23ffffff]` || LowShadow || 50251034Sed// || `[0x00000000, 0x1fffffff]` || LowMem || 51274201Sdim// 52276789Sdim// Default Linux/i386 mapping on i386 machine 53276789Sdim// (addresses starting with 0xc0000000 are reserved 54276789Sdim// for kernel and thus not sanitized): 55276789Sdim// || `[0x38000000, 0xbfffffff]` || HighMem || 56276789Sdim// || `[0x27000000, 0x37ffffff]` || HighShadow || 57276789Sdim// || `[0x24000000, 0x26ffffff]` || ShadowGap || 58276789Sdim// || `[0x20000000, 0x23ffffff]` || LowShadow || 59276789Sdim// || `[0x00000000, 0x1fffffff]` || LowMem || 60276789Sdim// 61280031Sdim// Default Linux/MIPS32 mapping: 62276789Sdim// || `[0x2aaa0000, 0xffffffff]` || HighMem || 63276789Sdim// || `[0x0fff4000, 0x2aa9ffff]` || HighShadow || 64276789Sdim// || `[0x0bff4000, 0x0fff3fff]` || ShadowGap || 65276789Sdim// || `[0x0aaa0000, 0x0bff3fff]` || LowShadow || 66276789Sdim// || `[0x00000000, 0x0aa9ffff]` || LowMem || 67276789Sdim// 68280031Sdim// Default Linux/MIPS64 mapping: 69280031Sdim// || `[0x4000000000, 0xffffffffff]` || HighMem || 70280031Sdim// || `[0x2800000000, 0x3fffffffff]` || HighShadow || 71280031Sdim// || `[0x2400000000, 0x27ffffffff]` || ShadowGap || 72280031Sdim// || `[0x2000000000, 0x23ffffffff]` || LowShadow || 73280031Sdim// || `[0x0000000000, 0x1fffffffff]` || LowMem || 74280031Sdim// 75296417Sdim// Default Linux/AArch64 (39-bit VMA) mapping: 76296417Sdim// || `[0x2000000000, 0x7fffffffff]` || highmem || 77296417Sdim// || `[0x1400000000, 0x1fffffffff]` || highshadow || 78296417Sdim// || `[0x1200000000, 0x13ffffffff]` || shadowgap || 79296417Sdim// || `[0x1000000000, 0x11ffffffff]` || lowshadow || 80296417Sdim// || `[0x0000000000, 0x0fffffffff]` || lowmem || 81296417Sdim// 82296417Sdim// Default Linux/AArch64 (42-bit VMA) mapping: 83296417Sdim// || `[0x10000000000, 0x3ffffffffff]` || highmem || 84296417Sdim// || `[0x0a000000000, 0x0ffffffffff]` || highshadow || 85296417Sdim// || `[0x09000000000, 0x09fffffffff]` || shadowgap || 86296417Sdim// || `[0x08000000000, 0x08fffffffff]` || lowshadow || 87296417Sdim// || `[0x00000000000, 0x07fffffffff]` || lowmem || 88296417Sdim// 89309124Sdim// Default Linux/S390 mapping: 90309124Sdim// || `[0x30000000, 0x7fffffff]` || HighMem || 91309124Sdim// || `[0x26000000, 0x2fffffff]` || HighShadow || 92309124Sdim// || `[0x24000000, 0x25ffffff]` || ShadowGap || 93309124Sdim// || `[0x20000000, 0x23ffffff]` || LowShadow || 94309124Sdim// || `[0x00000000, 0x1fffffff]` || LowMem || 95309124Sdim// 96309124Sdim// Default Linux/SystemZ mapping: 97309124Sdim// || `[0x14000000000000, 0x1fffffffffffff]` || HighMem || 98309124Sdim// || `[0x12800000000000, 0x13ffffffffffff]` || HighShadow || 99309124Sdim// || `[0x12000000000000, 0x127fffffffffff]` || ShadowGap || 100309124Sdim// || `[0x10000000000000, 0x11ffffffffffff]` || LowShadow || 101309124Sdim// || `[0x00000000000000, 0x0fffffffffffff]` || LowMem || 102309124Sdim// 103353358Sdim// Default Linux/SPARC64 (52-bit VMA) mapping: 104353358Sdim// || `[0x8000000000000, 0xfffffffffffff]` || HighMem || 105353358Sdim// || `[0x1080000000000, 0x207ffffffffff]` || HighShadow || 106353358Sdim// || `[0x0090000000000, 0x107ffffffffff]` || ShadowGap || 107353358Sdim// || `[0x0080000000000, 0x008ffffffffff]` || LowShadow || 108353358Sdim// || `[0x0000000000000, 0x007ffffffffff]` || LowMem || 109353358Sdim// 110276789Sdim// Shadow mapping on FreeBSD/x86-64 with SHADOW_OFFSET == 0x400000000000: 111276789Sdim// || `[0x500000000000, 0x7fffffffffff]` || HighMem || 112276789Sdim// || `[0x4a0000000000, 0x4fffffffffff]` || HighShadow || 113276789Sdim// || `[0x480000000000, 0x49ffffffffff]` || ShadowGap || 114276789Sdim// || `[0x400000000000, 0x47ffffffffff]` || LowShadow || 115276789Sdim// || `[0x000000000000, 0x3fffffffffff]` || LowMem || 116276789Sdim// 117276789Sdim// Shadow mapping on FreeBSD/i386 with SHADOW_OFFSET == 0x40000000: 118276789Sdim// || `[0x60000000, 0xffffffff]` || HighMem || 119276789Sdim// || `[0x4c000000, 0x5fffffff]` || HighShadow || 120276789Sdim// || `[0x48000000, 0x4bffffff]` || ShadowGap || 121276789Sdim// || `[0x40000000, 0x47ffffff]` || LowShadow || 122276789Sdim// || `[0x00000000, 0x3fffffff]` || LowMem || 123280031Sdim// 124327952Sdim// Shadow mapping on NetBSD/x86-64 with SHADOW_OFFSET == 0x400000000000: 125327952Sdim// || `[0x4feffffffe01, 0x7f7ffffff000]` || HighMem || 126327952Sdim// || `[0x49fdffffffc0, 0x4feffffffe00]` || HighShadow || 127327952Sdim// || `[0x480000000000, 0x49fdffffffbf]` || ShadowGap || 128327952Sdim// || `[0x400000000000, 0x47ffffffffff]` || LowShadow || 129327952Sdim// || `[0x000000000000, 0x3fffffffffff]` || LowMem || 130327952Sdim// 131341825Sdim// Shadow mapping on NetBSD/i386 with SHADOW_OFFSET == 0x40000000: 132341825Sdim// || `[0x60000000, 0xfffff000]` || HighMem || 133341825Sdim// || `[0x4c000000, 0x5fffffff]` || HighShadow || 134341825Sdim// || `[0x48000000, 0x4bffffff]` || ShadowGap || 135341825Sdim// || `[0x40000000, 0x47ffffff]` || LowShadow || 136341825Sdim// || `[0x00000000, 0x3fffffff]` || LowMem || 137341825Sdim// 138280031Sdim// Default Windows/i386 mapping: 139280031Sdim// (the exact location of HighShadow/HighMem may vary depending 140280031Sdim// on WoW64, /LARGEADDRESSAWARE, etc). 141280031Sdim// || `[0x50000000, 0xffffffff]` || HighMem || 142280031Sdim// || `[0x3a000000, 0x4fffffff]` || HighShadow || 143280031Sdim// || `[0x36000000, 0x39ffffff]` || ShadowGap || 144280031Sdim// || `[0x30000000, 0x35ffffff]` || LowShadow || 145280031Sdim// || `[0x00000000, 0x2fffffff]` || LowMem || 146341825Sdim// 147341825Sdim// Shadow mapping on Myriad2 (for shadow scale 5): 148341825Sdim// || `[0x9ff80000, 0x9fffffff]` || ShadowGap || 149341825Sdim// || `[0x9f000000, 0x9ff7ffff]` || LowShadow || 150341825Sdim// || `[0x80000000, 0x9effffff]` || LowMem || 151341825Sdim// || `[0x00000000, 0x7fffffff]` || Ignored || 152229109Sed 153327952Sdim#if defined(ASAN_SHADOW_SCALE) 154327952Sdimstatic const u64 kDefaultShadowScale = ASAN_SHADOW_SCALE; 155327952Sdim#else 156341825Sdimstatic const u64 kDefaultShadowScale = SANITIZER_MYRIAD2 ? 5 : 3; 157327952Sdim#endif 158314564Sdimstatic const u64 kDefaultShadowSentinel = ~(uptr)0; 159276789Sdimstatic const u64 kDefaultShadowOffset32 = 1ULL << 29; // 0x20000000 160274201Sdimstatic const u64 kDefaultShadowOffset64 = 1ULL << 44; 161327952Sdimstatic const u64 kDefaultShort64bitShadowOffset = 162327952Sdim 0x7FFFFFFF & (~0xFFFULL << kDefaultShadowScale); // < 2G. 163276789Sdimstatic const u64 kAArch64_ShadowOffset64 = 1ULL << 36; 164276789Sdimstatic const u64 kMIPS32_ShadowOffset32 = 0x0aaa0000; 165280031Sdimstatic const u64 kMIPS64_ShadowOffset64 = 1ULL << 37; 166327952Sdimstatic const u64 kPPC64_ShadowOffset64 = 1ULL << 44; 167309124Sdimstatic const u64 kSystemZ_ShadowOffset64 = 1ULL << 52; 168353358Sdimstatic const u64 kSPARC64_ShadowOffset64 = 1ULL << 43; // 0x80000000000 169276789Sdimstatic const u64 kFreeBSD_ShadowOffset32 = 1ULL << 30; // 0x40000000 170276789Sdimstatic const u64 kFreeBSD_ShadowOffset64 = 1ULL << 46; // 0x400000000000 171341825Sdimstatic const u64 kNetBSD_ShadowOffset32 = 1ULL << 30; // 0x40000000 172327952Sdimstatic const u64 kNetBSD_ShadowOffset64 = 1ULL << 46; // 0x400000000000 173280031Sdimstatic const u64 kWindowsShadowOffset32 = 3ULL << 28; // 0x30000000 174274201Sdim 175341825Sdimstatic const u64 kMyriadMemoryOffset32 = 0x80000000ULL; 176341825Sdimstatic const u64 kMyriadMemorySize32 = 0x20000000ULL; 177341825Sdimstatic const u64 kMyriadMemoryEnd32 = 178341825Sdim kMyriadMemoryOffset32 + kMyriadMemorySize32 - 1; 179341825Sdimstatic const u64 kMyriadShadowOffset32 = 180341825Sdim (kMyriadMemoryOffset32 + kMyriadMemorySize32 - 181341825Sdim (kMyriadMemorySize32 >> kDefaultShadowScale)); 182341825Sdimstatic const u64 kMyriadCacheBitMask32 = 0x40000000ULL; 183341825Sdim 184276789Sdim#define SHADOW_SCALE kDefaultShadowScale 185296417Sdim 186327952Sdim#if SANITIZER_FUCHSIA 187327952Sdim# define SHADOW_OFFSET (0) 188327952Sdim#elif SANITIZER_WORDSIZE == 32 189296417Sdim# if SANITIZER_ANDROID 190327952Sdim# define SHADOW_OFFSET __asan_shadow_memory_dynamic_address 191296417Sdim# elif defined(__mips__) 192276789Sdim# define SHADOW_OFFSET kMIPS32_ShadowOffset32 193276789Sdim# elif SANITIZER_FREEBSD 194276789Sdim# define SHADOW_OFFSET kFreeBSD_ShadowOffset32 195341825Sdim# elif SANITIZER_NETBSD 196341825Sdim# define SHADOW_OFFSET kNetBSD_ShadowOffset32 197288943Sdim# elif SANITIZER_WINDOWS 198288943Sdim# define SHADOW_OFFSET kWindowsShadowOffset32 199280031Sdim# elif SANITIZER_IOS 200353358Sdim# define SHADOW_OFFSET __asan_shadow_memory_dynamic_address 201341825Sdim# elif SANITIZER_MYRIAD2 202341825Sdim# define SHADOW_OFFSET kMyriadShadowOffset32 203276789Sdim# else 204280031Sdim# define SHADOW_OFFSET kDefaultShadowOffset32 205276789Sdim# endif 206296417Sdim#else 207309124Sdim# if SANITIZER_IOS 208353358Sdim# define SHADOW_OFFSET __asan_shadow_memory_dynamic_address 209309124Sdim# elif defined(__aarch64__) 210276789Sdim# define SHADOW_OFFSET kAArch64_ShadowOffset64 211276789Sdim# elif defined(__powerpc64__) 212276789Sdim# define SHADOW_OFFSET kPPC64_ShadowOffset64 213309124Sdim# elif defined(__s390x__) 214309124Sdim# define SHADOW_OFFSET kSystemZ_ShadowOffset64 215276789Sdim# elif SANITIZER_FREEBSD 216276789Sdim# define SHADOW_OFFSET kFreeBSD_ShadowOffset64 217327952Sdim# elif SANITIZER_NETBSD 218327952Sdim# define SHADOW_OFFSET kNetBSD_ShadowOffset64 219276789Sdim# elif SANITIZER_MAC 220276789Sdim# define SHADOW_OFFSET kDefaultShadowOffset64 221276789Sdim# elif defined(__mips64) 222276789Sdim# define SHADOW_OFFSET kMIPS64_ShadowOffset64 223353358Sdim#elif defined(__sparc__) 224353358Sdim#define SHADOW_OFFSET kSPARC64_ShadowOffset64 225309124Sdim# elif SANITIZER_WINDOWS64 226314564Sdim# define SHADOW_OFFSET __asan_shadow_memory_dynamic_address 227238901Sandrew# else 228276789Sdim# define SHADOW_OFFSET kDefaultShort64bitShadowOffset 229238901Sandrew# endif 230276789Sdim#endif 231229109Sed 232327952Sdim#if SANITIZER_ANDROID && defined(__arm__) 233327952Sdim# define ASAN_PREMAP_SHADOW 1 234327952Sdim#else 235327952Sdim# define ASAN_PREMAP_SHADOW 0 236327952Sdim#endif 237327952Sdim 238229109Sed#define SHADOW_GRANULARITY (1ULL << SHADOW_SCALE) 239341825Sdim 240341825Sdim#define DO_ASAN_MAPPING_PROFILE 0 // Set to 1 to profile the functions below. 241341825Sdim 242341825Sdim#if DO_ASAN_MAPPING_PROFILE 243341825Sdim# define PROFILE_ASAN_MAPPING() AsanMappingProfile[__LINE__]++; 244341825Sdim#else 245341825Sdim# define PROFILE_ASAN_MAPPING() 246341825Sdim#endif 247341825Sdim 248341825Sdim// If 1, all shadow boundaries are constants. 249341825Sdim// Don't set to 1 other than for testing. 250341825Sdim#define ASAN_FIXED_MAPPING 0 251341825Sdim 252341825Sdimnamespace __asan { 253341825Sdim 254341825Sdimextern uptr AsanMappingProfile[]; 255341825Sdim 256341825Sdim#if ASAN_FIXED_MAPPING 257341825Sdim// Fixed mapping for 64-bit Linux. Mostly used for performance comparison 258341825Sdim// with non-fixed mapping. As of r175253 (Feb 2013) the performance 259341825Sdim// difference between fixed and non-fixed mapping is below the noise level. 260341825Sdimstatic uptr kHighMemEnd = 0x7fffffffffffULL; 261341825Sdimstatic uptr kMidMemBeg = 0x3000000000ULL; 262341825Sdimstatic uptr kMidMemEnd = 0x4fffffffffULL; 263341825Sdim#else 264341825Sdimextern uptr kHighMemEnd, kMidMemBeg, kMidMemEnd; // Initialized in __asan_init. 265341825Sdim#endif 266341825Sdim 267341825Sdim} // namespace __asan 268341825Sdim 269341825Sdim#if SANITIZER_MYRIAD2 270341825Sdim#include "asan_mapping_myriad.h" 271353358Sdim#elif defined(__sparc__) && SANITIZER_WORDSIZE == 64 272353358Sdim#include "asan_mapping_sparc64.h" 273341825Sdim#else 274251034Sed#define MEM_TO_SHADOW(mem) (((mem) >> SHADOW_SCALE) + (SHADOW_OFFSET)) 275229109Sed 276229109Sed#define kLowMemBeg 0 277229109Sed#define kLowMemEnd (SHADOW_OFFSET ? SHADOW_OFFSET - 1 : 0) 278229109Sed 279229109Sed#define kLowShadowBeg SHADOW_OFFSET 280229109Sed#define kLowShadowEnd MEM_TO_SHADOW(kLowMemEnd) 281229109Sed 282229109Sed#define kHighMemBeg (MEM_TO_SHADOW(kHighMemEnd) + 1) 283229109Sed 284229109Sed#define kHighShadowBeg MEM_TO_SHADOW(kHighMemBeg) 285229109Sed#define kHighShadowEnd MEM_TO_SHADOW(kHighMemEnd) 286229109Sed 287251034Sed# define kMidShadowBeg MEM_TO_SHADOW(kMidMemBeg) 288251034Sed# define kMidShadowEnd MEM_TO_SHADOW(kMidMemEnd) 289251034Sed 290245614Sandrew// With the zero shadow base we can not actually map pages starting from 0. 291245614Sandrew// This constant is somewhat arbitrary. 292296417Sdim#define kZeroBaseShadowStart 0 293296417Sdim#define kZeroBaseMaxShadowStart (1 << 18) 294245614Sandrew 295245614Sandrew#define kShadowGapBeg (kLowShadowEnd ? kLowShadowEnd + 1 \ 296245614Sandrew : kZeroBaseShadowStart) 297251034Sed#define kShadowGapEnd ((kMidMemBeg ? kMidShadowBeg : kHighShadowBeg) - 1) 298229109Sed 299251034Sed#define kShadowGap2Beg (kMidMemBeg ? kMidShadowEnd + 1 : 0) 300251034Sed#define kShadowGap2End (kMidMemBeg ? kMidMemBeg - 1 : 0) 301229109Sed 302251034Sed#define kShadowGap3Beg (kMidMemBeg ? kMidMemEnd + 1 : 0) 303251034Sed#define kShadowGap3End (kMidMemBeg ? kHighShadowBeg - 1 : 0) 304251034Sed 305229109Sednamespace __asan { 306229109Sed 307238901Sandrewstatic inline bool AddrIsInLowMem(uptr a) { 308251034Sed PROFILE_ASAN_MAPPING(); 309341825Sdim return a <= kLowMemEnd; 310229109Sed} 311229109Sed 312238901Sandrewstatic inline bool AddrIsInLowShadow(uptr a) { 313251034Sed PROFILE_ASAN_MAPPING(); 314229109Sed return a >= kLowShadowBeg && a <= kLowShadowEnd; 315229109Sed} 316229109Sed 317341825Sdimstatic inline bool AddrIsInMidMem(uptr a) { 318341825Sdim PROFILE_ASAN_MAPPING(); 319341825Sdim return kMidMemBeg && a >= kMidMemBeg && a <= kMidMemEnd; 320341825Sdim} 321341825Sdim 322341825Sdimstatic inline bool AddrIsInMidShadow(uptr a) { 323341825Sdim PROFILE_ASAN_MAPPING(); 324341825Sdim return kMidMemBeg && a >= kMidShadowBeg && a <= kMidShadowEnd; 325341825Sdim} 326341825Sdim 327238901Sandrewstatic inline bool AddrIsInHighMem(uptr a) { 328251034Sed PROFILE_ASAN_MAPPING(); 329341825Sdim return kHighMemBeg && a >= kHighMemBeg && a <= kHighMemEnd; 330229109Sed} 331229109Sed 332341825Sdimstatic inline bool AddrIsInHighShadow(uptr a) { 333251034Sed PROFILE_ASAN_MAPPING(); 334341825Sdim return kHighMemBeg && a >= kHighShadowBeg && a <= kHighShadowEnd; 335251034Sed} 336251034Sed 337314564Sdimstatic inline bool AddrIsInShadowGap(uptr a) { 338314564Sdim PROFILE_ASAN_MAPPING(); 339314564Sdim if (kMidMemBeg) { 340314564Sdim if (a <= kShadowGapEnd) 341314564Sdim return SHADOW_OFFSET == 0 || a >= kShadowGapBeg; 342314564Sdim return (a >= kShadowGap2Beg && a <= kShadowGap2End) || 343314564Sdim (a >= kShadowGap3Beg && a <= kShadowGap3End); 344314564Sdim } 345314564Sdim // In zero-based shadow mode we treat addresses near zero as addresses 346314564Sdim // in shadow gap as well. 347314564Sdim if (SHADOW_OFFSET == 0) 348314564Sdim return a <= kShadowGapEnd; 349314564Sdim return a >= kShadowGapBeg && a <= kShadowGapEnd; 350314564Sdim} 351314564Sdim 352341825Sdim} // namespace __asan 353341825Sdim 354341825Sdim#endif // SANITIZER_MYRIAD2 355341825Sdim 356341825Sdimnamespace __asan { 357341825Sdim 358238901Sandrewstatic inline bool AddrIsInMem(uptr a) { 359251034Sed PROFILE_ASAN_MAPPING(); 360314564Sdim return AddrIsInLowMem(a) || AddrIsInMidMem(a) || AddrIsInHighMem(a) || 361314564Sdim (flags()->protect_shadow_gap == 0 && AddrIsInShadowGap(a)); 362229109Sed} 363229109Sed 364238901Sandrewstatic inline uptr MemToShadow(uptr p) { 365251034Sed PROFILE_ASAN_MAPPING(); 366229109Sed CHECK(AddrIsInMem(p)); 367229109Sed return MEM_TO_SHADOW(p); 368229109Sed} 369229109Sed 370238901Sandrewstatic inline bool AddrIsInShadow(uptr a) { 371251034Sed PROFILE_ASAN_MAPPING(); 372251034Sed return AddrIsInLowShadow(a) || AddrIsInMidShadow(a) || AddrIsInHighShadow(a); 373229109Sed} 374229109Sed 375238901Sandrewstatic inline bool AddrIsAlignedByGranularity(uptr a) { 376251034Sed PROFILE_ASAN_MAPPING(); 377229109Sed return (a & (SHADOW_GRANULARITY - 1)) == 0; 378229109Sed} 379229109Sed 380238901Sandrewstatic inline bool AddressIsPoisoned(uptr a) { 381251034Sed PROFILE_ASAN_MAPPING(); 382341825Sdim if (SANITIZER_MYRIAD2 && !AddrIsInMem(a) && !AddrIsInShadow(a)) 383341825Sdim return false; 384238901Sandrew const uptr kAccessSize = 1; 385251034Sed u8 *shadow_address = (u8*)MEM_TO_SHADOW(a); 386238901Sandrew s8 shadow_value = *shadow_address; 387238901Sandrew if (shadow_value) { 388238901Sandrew u8 last_accessed_byte = (a & (SHADOW_GRANULARITY - 1)) 389238901Sandrew + kAccessSize - 1; 390238901Sandrew return (last_accessed_byte >= shadow_value); 391238901Sandrew } 392238901Sandrew return false; 393238901Sandrew} 394238901Sandrew 395251034Sed// Must be after all calls to PROFILE_ASAN_MAPPING(). 396251034Sedstatic const uptr kAsanMappingProfileSize = __LINE__; 397251034Sed 398229109Sed} // namespace __asan 399229109Sed 400229109Sed#endif // ASAN_MAPPING_H 401