1285169Scy//===-- asan_mapping.h ------------------------------------------*- C++ -*-===// 2275970Scy// 3275970Scy// This file is distributed under the University of Illinois Open Source 4285169Scy// License. See LICENSE.TXT for details. 5285169Scy// 6275970Scy//===----------------------------------------------------------------------===// 7275970Scy// 8275970Scy// This file is a part of AddressSanitizer, an address sanity checker. 9275970Scy// 10275970Scy// Defines ASan memory mapping. 11275970Scy//===----------------------------------------------------------------------===// 12275970Scy#ifndef ASAN_MAPPING_H 13275970Scy#define ASAN_MAPPING_H 14275970Scy 15275970Scy#include "asan_internal.h" 16275970Scy 17275970Scy// The full explanation of the memory mapping could be found here: 18285169Scy// https://github.com/google/sanitizers/wiki/AddressSanitizerAlgorithm 19285169Scy// 20285169Scy// Typical shadow mapping on Linux/x86_64 with SHADOW_OFFSET == 0x00007fff8000: 21285169Scy// || `[0x10007fff8000, 0x7fffffffffff]` || HighMem || 22285169Scy// || `[0x02008fff7000, 0x10007fff7fff]` || HighShadow || 23285169Scy// || `[0x00008fff7000, 0x02008fff6fff]` || ShadowGap || 24285169Scy// || `[0x00007fff8000, 0x00008fff6fff]` || LowShadow || 25285169Scy// || `[0x000000000000, 0x00007fff7fff]` || LowMem || 26285169Scy// 27285169Scy// When SHADOW_OFFSET is zero (-pie): 28285169Scy// || `[0x100000000000, 0x7fffffffffff]` || HighMem || 29285169Scy// || `[0x020000000000, 0x0fffffffffff]` || HighShadow || 30285169Scy// || `[0x000000040000, 0x01ffffffffff]` || ShadowGap || 31285169Scy// 32285169Scy// Special case when something is already mapped between 33285169Scy// 0x003000000000 and 0x005000000000 (e.g. when prelink is installed): 34285169Scy// || `[0x10007fff8000, 0x7fffffffffff]` || HighMem || 35285169Scy// || `[0x02008fff7000, 0x10007fff7fff]` || HighShadow || 36285169Scy// || `[0x005000000000, 0x02008fff6fff]` || ShadowGap3 || 37285169Scy// || `[0x003000000000, 0x004fffffffff]` || MidMem || 38285169Scy// || `[0x000a7fff8000, 0x002fffffffff]` || ShadowGap2 || 39285169Scy// || `[0x00067fff8000, 0x000a7fff7fff]` || MidShadow || 40285169Scy// || `[0x00008fff7000, 0x00067fff7fff]` || ShadowGap || 41285169Scy// || `[0x00007fff8000, 0x00008fff6fff]` || LowShadow || 42285169Scy// || `[0x000000000000, 0x00007fff7fff]` || LowMem || 43285169Scy// 44285169Scy// Default Linux/i386 mapping on x86_64 machine: 45285169Scy// || `[0x40000000, 0xffffffff]` || HighMem || 46285169Scy// || `[0x28000000, 0x3fffffff]` || HighShadow || 47285169Scy// || `[0x24000000, 0x27ffffff]` || ShadowGap || 48285169Scy// || `[0x20000000, 0x23ffffff]` || LowShadow || 49285169Scy// || `[0x00000000, 0x1fffffff]` || LowMem || 50285169Scy// 51285169Scy// Default Linux/i386 mapping on i386 machine 52285169Scy// (addresses starting with 0xc0000000 are reserved 53285169Scy// for kernel and thus not sanitized): 54285169Scy// || `[0x38000000, 0xbfffffff]` || HighMem || 55285169Scy// || `[0x27000000, 0x37ffffff]` || HighShadow || 56285169Scy// || `[0x24000000, 0x26ffffff]` || ShadowGap || 57285169Scy// || `[0x20000000, 0x23ffffff]` || LowShadow || 58285169Scy// || `[0x00000000, 0x1fffffff]` || LowMem || 59285169Scy// 60285169Scy// Default Linux/MIPS32 mapping: 61285169Scy// || `[0x2aaa0000, 0xffffffff]` || HighMem || 62285169Scy// || `[0x0fff4000, 0x2aa9ffff]` || HighShadow || 63285169Scy// || `[0x0bff4000, 0x0fff3fff]` || ShadowGap || 64285169Scy// || `[0x0aaa0000, 0x0bff3fff]` || LowShadow || 65285169Scy// || `[0x00000000, 0x0aa9ffff]` || LowMem || 66285169Scy// 67285169Scy// Default Linux/MIPS64 mapping: 68285169Scy// || `[0x4000000000, 0xffffffffff]` || HighMem || 69285169Scy// || `[0x2800000000, 0x3fffffffff]` || HighShadow || 70285169Scy// || `[0x2400000000, 0x27ffffffff]` || ShadowGap || 71285169Scy// || `[0x2000000000, 0x23ffffffff]` || LowShadow || 72285169Scy// || `[0x0000000000, 0x1fffffffff]` || LowMem || 73275970Scy// 74275970Scy// Default Linux/AArch64 (39-bit VMA) mapping: 75275970Scy// || `[0x2000000000, 0x7fffffffff]` || highmem || 76275970Scy// || `[0x1400000000, 0x1fffffffff]` || highshadow || 77275970Scy// || `[0x1200000000, 0x13ffffffff]` || shadowgap || 78275970Scy// || `[0x1000000000, 0x11ffffffff]` || lowshadow || 79275970Scy// || `[0x0000000000, 0x0fffffffff]` || lowmem || 80275970Scy// 81275970Scy// Default Linux/AArch64 (42-bit VMA) mapping: 82275970Scy// || `[0x10000000000, 0x3ffffffffff]` || highmem || 83275970Scy// || `[0x0a000000000, 0x0ffffffffff]` || highshadow || 84275970Scy// || `[0x09000000000, 0x09fffffffff]` || shadowgap || 85275970Scy// || `[0x08000000000, 0x08fffffffff]` || lowshadow || 86275970Scy// || `[0x00000000000, 0x07fffffffff]` || lowmem || 87275970Scy// 88275970Scy// Default Linux/S390 mapping: 89275970Scy// || `[0x30000000, 0x7fffffff]` || HighMem || 90275970Scy// || `[0x26000000, 0x2fffffff]` || HighShadow || 91275970Scy// || `[0x24000000, 0x25ffffff]` || ShadowGap || 92275970Scy// || `[0x20000000, 0x23ffffff]` || LowShadow || 93275970Scy// || `[0x00000000, 0x1fffffff]` || LowMem || 94275970Scy// 95275970Scy// Default Linux/SystemZ mapping: 96275970Scy// || `[0x14000000000000, 0x1fffffffffffff]` || HighMem || 97275970Scy// || `[0x12800000000000, 0x13ffffffffffff]` || HighShadow || 98275970Scy// || `[0x12000000000000, 0x127fffffffffff]` || ShadowGap || 99275970Scy// || `[0x10000000000000, 0x11ffffffffffff]` || LowShadow || 100275970Scy// || `[0x00000000000000, 0x0fffffffffffff]` || LowMem || 101275970Scy// 102275970Scy// Default Linux/SPARC64 (52-bit VMA) mapping: 103275970Scy// || `[0x8000000000000, 0xfffffffffffff]` || HighMem || 104275970Scy// || `[0x1080000000000, 0x207ffffffffff]` || HighShadow || 105275970Scy// || `[0x0090000000000, 0x107ffffffffff]` || ShadowGap || 106275970Scy// || `[0x0080000000000, 0x008ffffffffff]` || LowShadow || 107275970Scy// || `[0x0000000000000, 0x007ffffffffff]` || LowMem || 108275970Scy// 109275970Scy// Shadow mapping on FreeBSD/x86-64 with SHADOW_OFFSET == 0x400000000000: 110275970Scy// || `[0x500000000000, 0x7fffffffffff]` || HighMem || 111275970Scy// || `[0x4a0000000000, 0x4fffffffffff]` || HighShadow || 112275970Scy// || `[0x480000000000, 0x49ffffffffff]` || ShadowGap || 113285169Scy// || `[0x400000000000, 0x47ffffffffff]` || LowShadow || 114275970Scy// || `[0x000000000000, 0x3fffffffffff]` || LowMem || 115282408Scy// 116282408Scy// Shadow mapping on FreeBSD/i386 with SHADOW_OFFSET == 0x40000000: 117282408Scy// || `[0x60000000, 0xffffffff]` || HighMem || 118282408Scy// || `[0x4c000000, 0x5fffffff]` || HighShadow || 119275970Scy// || `[0x48000000, 0x4bffffff]` || ShadowGap || 120275970Scy// || `[0x40000000, 0x47ffffff]` || LowShadow || 121285169Scy// || `[0x00000000, 0x3fffffff]` || LowMem || 122285169Scy// 123275970Scy// Shadow mapping on NetBSD/x86-64 with SHADOW_OFFSET == 0x400000000000: 124275970Scy// || `[0x4feffffffe01, 0x7f7ffffff000]` || HighMem || 125275970Scy// || `[0x49fdffffffc0, 0x4feffffffe00]` || HighShadow || 126275970Scy// || `[0x480000000000, 0x49fdffffffbf]` || ShadowGap || 127285169Scy// || `[0x400000000000, 0x47ffffffffff]` || LowShadow || 128285169Scy// || `[0x000000000000, 0x3fffffffffff]` || LowMem || 129285169Scy// 130285169Scy// Shadow mapping on NetBSD/i386 with SHADOW_OFFSET == 0x40000000: 131285169Scy// || `[0x60000000, 0xfffff000]` || HighMem || 132285169Scy// || `[0x4c000000, 0x5fffffff]` || HighShadow || 133285169Scy// || `[0x48000000, 0x4bffffff]` || ShadowGap || 134285169Scy// || `[0x40000000, 0x47ffffff]` || LowShadow || 135285169Scy// || `[0x00000000, 0x3fffffff]` || LowMem || 136285169Scy// 137275970Scy// Default Windows/i386 mapping: 138285169Scy// (the exact location of HighShadow/HighMem may vary depending 139275970Scy// on WoW64, /LARGEADDRESSAWARE, etc). 140275970Scy// || `[0x50000000, 0xffffffff]` || HighMem || 141285169Scy// || `[0x3a000000, 0x4fffffff]` || HighShadow || 142285169Scy// || `[0x36000000, 0x39ffffff]` || ShadowGap || 143285169Scy// || `[0x30000000, 0x35ffffff]` || LowShadow || 144285169Scy// || `[0x00000000, 0x2fffffff]` || LowMem || 145285169Scy// 146275970Scy// Shadow mapping on Myriad2 (for shadow scale 5): 147285169Scy// || `[0x9ff80000, 0x9fffffff]` || ShadowGap || 148285169Scy// || `[0x9f000000, 0x9ff7ffff]` || LowShadow || 149275970Scy// || `[0x80000000, 0x9effffff]` || LowMem || 150275970Scy// || `[0x00000000, 0x7fffffff]` || Ignored || 151275970Scy 152275970Scy#if defined(ASAN_SHADOW_SCALE) 153275970Scystatic const u64 kDefaultShadowScale = ASAN_SHADOW_SCALE; 154275970Scy#else 155275970Scystatic const u64 kDefaultShadowScale = SANITIZER_MYRIAD2 ? 5 : 3; 156275970Scy#endif 157275970Scystatic const u64 kDefaultShadowSentinel = ~(uptr)0; 158275970Scystatic const u64 kDefaultShadowOffset32 = 1ULL << 29; // 0x20000000 159289764Sglebiusstatic const u64 kDefaultShadowOffset64 = 1ULL << 44; 160275970Scystatic const u64 kDefaultShort64bitShadowOffset = 161275970Scy 0x7FFFFFFF & (~0xFFFULL << kDefaultShadowScale); // < 2G. 162275970Scystatic const u64 kIosShadowOffset32 = 1ULL << 30; // 0x40000000 163275970Scystatic const u64 kIosShadowOffset64 = 0x120200000; 164275970Scystatic const u64 kIosSimShadowOffset32 = 1ULL << 30; 165275970Scystatic const u64 kIosSimShadowOffset64 = kDefaultShadowOffset64; 166275970Scystatic const u64 kAArch64_ShadowOffset64 = 1ULL << 36; 167275970Scystatic const u64 kMIPS32_ShadowOffset32 = 0x0aaa0000; 168289764Sglebiusstatic const u64 kMIPS64_ShadowOffset64 = 1ULL << 37; 169275970Scystatic const u64 kPPC64_ShadowOffset64 = 1ULL << 41; 170275970Scystatic const u64 kSystemZ_ShadowOffset64 = 1ULL << 52; 171275970Scystatic const u64 kSPARC64_ShadowOffset64 = 1ULL << 43; // 0x80000000000 172275970Scystatic const u64 kFreeBSD_ShadowOffset32 = 1ULL << 30; // 0x40000000 173275970Scystatic const u64 kFreeBSD_ShadowOffset64 = 1ULL << 46; // 0x400000000000 174275970Scystatic const u64 kNetBSD_ShadowOffset32 = 1ULL << 30; // 0x40000000 175275970Scystatic const u64 kNetBSD_ShadowOffset64 = 1ULL << 46; // 0x400000000000 176275970Scystatic const u64 kWindowsShadowOffset32 = 3ULL << 28; // 0x30000000 177275970Scy 178275970Scystatic const u64 kMyriadMemoryOffset32 = 0x80000000ULL; 179275970Scystatic const u64 kMyriadMemorySize32 = 0x20000000ULL; 180275970Scystatic const u64 kMyriadMemoryEnd32 = 181275970Scy kMyriadMemoryOffset32 + kMyriadMemorySize32 - 1; 182275970Scystatic const u64 kMyriadShadowOffset32 = 183275970Scy (kMyriadMemoryOffset32 + kMyriadMemorySize32 - 184275970Scy (kMyriadMemorySize32 >> kDefaultShadowScale)); 185275970Scystatic const u64 kMyriadCacheBitMask32 = 0x40000000ULL; 186275970Scy 187275970Scy#define SHADOW_SCALE kDefaultShadowScale 188275970Scy 189275970Scy#if SANITIZER_FUCHSIA 190275970Scy# define SHADOW_OFFSET (0) 191275970Scy#elif SANITIZER_WORDSIZE == 32 192275970Scy# if SANITIZER_ANDROID 193275970Scy# define SHADOW_OFFSET __asan_shadow_memory_dynamic_address 194275970Scy# elif defined(__mips__) 195275970Scy# define SHADOW_OFFSET kMIPS32_ShadowOffset32 196275970Scy# elif SANITIZER_FREEBSD 197275970Scy# define SHADOW_OFFSET kFreeBSD_ShadowOffset32 198275970Scy# elif SANITIZER_NETBSD 199275970Scy# define SHADOW_OFFSET kNetBSD_ShadowOffset32 200275970Scy# elif SANITIZER_WINDOWS 201275970Scy# define SHADOW_OFFSET kWindowsShadowOffset32 202275970Scy# elif SANITIZER_IOS 203275970Scy# if SANITIZER_IOSSIM 204275970Scy# define SHADOW_OFFSET kIosSimShadowOffset32 205275970Scy# else 206280849Scy# define SHADOW_OFFSET kIosShadowOffset32 207275970Scy# endif 208275970Scy# elif SANITIZER_MYRIAD2 209275970Scy# define SHADOW_OFFSET kMyriadShadowOffset32 210275970Scy# else 211275970Scy# define SHADOW_OFFSET kDefaultShadowOffset32 212275970Scy# endif 213275970Scy#else 214275970Scy# if SANITIZER_IOS 215275970Scy# if SANITIZER_IOSSIM 216275970Scy# define SHADOW_OFFSET kIosSimShadowOffset64 217275970Scy# else 218275970Scy# define SHADOW_OFFSET __asan_shadow_memory_dynamic_address 219275970Scy# endif 220275970Scy# elif defined(__aarch64__) 221275970Scy# define SHADOW_OFFSET kAArch64_ShadowOffset64 222289764Sglebius# elif defined(__powerpc64__) 223275970Scy# define SHADOW_OFFSET kPPC64_ShadowOffset64 224275970Scy# elif defined(__s390x__) 225275970Scy# define SHADOW_OFFSET kSystemZ_ShadowOffset64 226275970Scy# elif SANITIZER_FREEBSD 227275970Scy# define SHADOW_OFFSET kFreeBSD_ShadowOffset64 228275970Scy// XXX: see TARGET_ASAN_SHADOW_OFFSET in gcc. 229275970Scy// for example ix86_asan_shadow_offset() in i386.c 230275970Scy// # elif SANITIZER_NETBSD 231275970Scy// # define SHADOW_OFFSET kNetBSD_ShadowOffset64 232275970Scy# elif SANITIZER_MAC 233275970Scy# define SHADOW_OFFSET kDefaultShadowOffset64 234275970Scy# elif defined(__mips64) 235275970Scy# define SHADOW_OFFSET kMIPS64_ShadowOffset64 236275970Scy# elif defined(__sparc__) 237275970Scy# define SHADOW_OFFSET kSPARC64_ShadowOffset64 238275970Scy# elif SANITIZER_WINDOWS64 239275970Scy# define SHADOW_OFFSET __asan_shadow_memory_dynamic_address 240275970Scy# else 241275970Scy# define SHADOW_OFFSET kDefaultShort64bitShadowOffset 242275970Scy# endif 243275970Scy#endif 244275970Scy 245275970Scy#if SANITIZER_ANDROID && defined(__arm__) 246275970Scy# define ASAN_PREMAP_SHADOW 1 247275970Scy#else 248275970Scy# define ASAN_PREMAP_SHADOW 0 249275970Scy#endif 250275970Scy 251275970Scy#define SHADOW_GRANULARITY (1ULL << SHADOW_SCALE) 252275970Scy 253275970Scy#define DO_ASAN_MAPPING_PROFILE 0 // Set to 1 to profile the functions below. 254275970Scy 255275970Scy#if DO_ASAN_MAPPING_PROFILE 256275970Scy# define PROFILE_ASAN_MAPPING() AsanMappingProfile[__LINE__]++; 257275970Scy#else 258275970Scy# define PROFILE_ASAN_MAPPING() 259275970Scy#endif 260275970Scy 261275970Scy// If 1, all shadow boundaries are constants. 262275970Scy// Don't set to 1 other than for testing. 263275970Scy#define ASAN_FIXED_MAPPING 0 264275970Scy 265275970Scynamespace __asan { 266275970Scy 267275970Scyextern uptr AsanMappingProfile[]; 268275970Scy 269275970Scy#if ASAN_FIXED_MAPPING 270275970Scy// Fixed mapping for 64-bit Linux. Mostly used for performance comparison 271275970Scy// with non-fixed mapping. As of r175253 (Feb 2013) the performance 272275970Scy// difference between fixed and non-fixed mapping is below the noise level. 273275970Scystatic uptr kHighMemEnd = 0x7fffffffffffULL; 274275970Scystatic uptr kMidMemBeg = 0x3000000000ULL; 275275970Scystatic uptr kMidMemEnd = 0x4fffffffffULL; 276275970Scy#else 277275970Scyextern uptr kHighMemEnd, kMidMemBeg, kMidMemEnd; // Initialized in __asan_init. 278275970Scy#endif 279275970Scy 280275970Scy} // namespace __asan 281275970Scy 282275970Scy#if SANITIZER_MYRIAD2 283275970Scy#include "asan_mapping_myriad.h" 284275970Scy#elif defined(__sparc__) && SANITIZER_WORDSIZE == 64 285275970Scy#include "asan_mapping_sparc64.h" 286275970Scy#else 287275970Scy#define MEM_TO_SHADOW(mem) (((mem) >> SHADOW_SCALE) + (SHADOW_OFFSET)) 288275970Scy 289275970Scy#define kLowMemBeg 0 290275970Scy#define kLowMemEnd (SHADOW_OFFSET ? SHADOW_OFFSET - 1 : 0) 291275970Scy 292275970Scy#define kLowShadowBeg SHADOW_OFFSET 293275970Scy#define kLowShadowEnd MEM_TO_SHADOW(kLowMemEnd) 294275970Scy 295275970Scy#define kHighMemBeg (MEM_TO_SHADOW(kHighMemEnd) + 1) 296275970Scy 297285169Scy#define kHighShadowBeg MEM_TO_SHADOW(kHighMemBeg) 298275970Scy#define kHighShadowEnd MEM_TO_SHADOW(kHighMemEnd) 299275970Scy 300275970Scy# define kMidShadowBeg MEM_TO_SHADOW(kMidMemBeg) 301275970Scy# define kMidShadowEnd MEM_TO_SHADOW(kMidMemEnd) 302275970Scy 303275970Scy// With the zero shadow base we can not actually map pages starting from 0. 304275970Scy// This constant is somewhat arbitrary. 305275970Scy#define kZeroBaseShadowStart 0 306275970Scy#define kZeroBaseMaxShadowStart (1 << 18) 307275970Scy 308275970Scy#define kShadowGapBeg (kLowShadowEnd ? kLowShadowEnd + 1 \ 309275970Scy : kZeroBaseShadowStart) 310275970Scy#define kShadowGapEnd ((kMidMemBeg ? kMidShadowBeg : kHighShadowBeg) - 1) 311275970Scy 312275970Scy#define kShadowGap2Beg (kMidMemBeg ? kMidShadowEnd + 1 : 0) 313275970Scy#define kShadowGap2End (kMidMemBeg ? kMidMemBeg - 1 : 0) 314275970Scy 315275970Scy#define kShadowGap3Beg (kMidMemBeg ? kMidMemEnd + 1 : 0) 316275970Scy#define kShadowGap3End (kMidMemBeg ? kHighShadowBeg - 1 : 0) 317275970Scy 318275970Scynamespace __asan { 319275970Scy 320275970Scystatic inline bool AddrIsInLowMem(uptr a) { 321275970Scy PROFILE_ASAN_MAPPING(); 322275970Scy return a <= kLowMemEnd; 323275970Scy} 324282408Scy 325282408Scystatic inline bool AddrIsInLowShadow(uptr a) { 326282408Scy PROFILE_ASAN_MAPPING(); 327282408Scy return a >= kLowShadowBeg && a <= kLowShadowEnd; 328282408Scy} 329275970Scy 330275970Scystatic inline bool AddrIsInMidMem(uptr a) { 331275970Scy PROFILE_ASAN_MAPPING(); 332275970Scy return kMidMemBeg && a >= kMidMemBeg && a <= kMidMemEnd; 333275970Scy} 334275970Scy 335275970Scystatic inline bool AddrIsInMidShadow(uptr a) { 336275970Scy PROFILE_ASAN_MAPPING(); 337275970Scy return kMidMemBeg && a >= kMidShadowBeg && a <= kMidShadowEnd; 338275970Scy} 339275970Scy 340275970Scystatic inline bool AddrIsInHighMem(uptr a) { 341275970Scy PROFILE_ASAN_MAPPING(); 342275970Scy return kHighMemBeg && a >= kHighMemBeg && a <= kHighMemEnd; 343275970Scy} 344275970Scy 345275970Scystatic inline bool AddrIsInHighShadow(uptr a) { 346275970Scy PROFILE_ASAN_MAPPING(); 347275970Scy return kHighMemBeg && a >= kHighShadowBeg && a <= kHighShadowEnd; 348275970Scy} 349275970Scy 350275970Scystatic inline bool AddrIsInShadowGap(uptr a) { 351275970Scy PROFILE_ASAN_MAPPING(); 352275970Scy if (kMidMemBeg) { 353275970Scy if (a <= kShadowGapEnd) 354275970Scy return SHADOW_OFFSET == 0 || a >= kShadowGapBeg; 355275970Scy return (a >= kShadowGap2Beg && a <= kShadowGap2End) || 356275970Scy (a >= kShadowGap3Beg && a <= kShadowGap3End); 357275970Scy } 358275970Scy // In zero-based shadow mode we treat addresses near zero as addresses 359275970Scy // in shadow gap as well. 360275970Scy if (SHADOW_OFFSET == 0) 361275970Scy return a <= kShadowGapEnd; 362275970Scy return a >= kShadowGapBeg && a <= kShadowGapEnd; 363275970Scy} 364275970Scy 365275970Scy} // namespace __asan 366275970Scy 367275970Scy#endif // SANITIZER_MYRIAD2 368275970Scy 369275970Scynamespace __asan { 370275970Scy 371275970Scystatic inline bool AddrIsInMem(uptr a) { 372275970Scy PROFILE_ASAN_MAPPING(); 373275970Scy return AddrIsInLowMem(a) || AddrIsInMidMem(a) || AddrIsInHighMem(a) || 374275970Scy (flags()->protect_shadow_gap == 0 && AddrIsInShadowGap(a)); 375275970Scy} 376275970Scy 377275970Scystatic inline uptr MemToShadow(uptr p) { 378275970Scy PROFILE_ASAN_MAPPING(); 379275970Scy CHECK(AddrIsInMem(p)); 380275970Scy return MEM_TO_SHADOW(p); 381275970Scy} 382275970Scy 383275970Scystatic inline bool AddrIsInShadow(uptr a) { 384275970Scy PROFILE_ASAN_MAPPING(); 385275970Scy return AddrIsInLowShadow(a) || AddrIsInMidShadow(a) || AddrIsInHighShadow(a); 386275970Scy} 387275970Scy 388275970Scystatic inline bool AddrIsAlignedByGranularity(uptr a) { 389275970Scy PROFILE_ASAN_MAPPING(); 390275970Scy return (a & (SHADOW_GRANULARITY - 1)) == 0; 391275970Scy} 392275970Scy 393275970Scystatic inline bool AddressIsPoisoned(uptr a) { 394275970Scy PROFILE_ASAN_MAPPING(); 395275970Scy if (SANITIZER_MYRIAD2 && !AddrIsInMem(a) && !AddrIsInShadow(a)) 396275970Scy return false; 397275970Scy const uptr kAccessSize = 1; 398275970Scy u8 *shadow_address = (u8*)MEM_TO_SHADOW(a); 399275970Scy s8 shadow_value = *shadow_address; 400275970Scy if (shadow_value) { 401275970Scy u8 last_accessed_byte = (a & (SHADOW_GRANULARITY - 1)) 402275970Scy + kAccessSize - 1; 403275970Scy return (last_accessed_byte >= shadow_value); 404275970Scy } 405275970Scy return false; 406275970Scy} 407275970Scy 408275970Scy// Must be after all calls to PROFILE_ASAN_MAPPING(). 409275970Scystatic const uptr kAsanMappingProfileSize = __LINE__; 410275970Scy 411275970Scy} // namespace __asan 412275970Scy 413275970Scy#endif // ASAN_MAPPING_H 414275970Scy