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Differential D115193

Revert "[ASan] Added asan_shadow_defines.h, which contatins shadow offset for various platforms."
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Authored by kstoimenov on Dec 6 2021, 3:08 PM.

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rGf4606d2b70e4: Revert "[ASan] Added asan_shadow_defines.h, which contatins shadow offset for…
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This reverts commit 2f3bb59f512f8904fb2f0d7cd7bead3172fbc5d1.

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kstoimenov created this revision.Dec 6 2021, 3:08 PM
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Closed by commit rGf4606d2b70e4: Revert "[ASan] Added asan_shadow_defines.h, which contatins shadow offset for… (authored by kstoimenov). · Explain Why
This revision was automatically updated to reflect the committed changes.
kstoimenov added a commit: rGf4606d2b70e4: Revert "[ASan] Added asan_shadow_defines.h, which contatins shadow offset for….
Harbormaster completed remote builds in B137762: Diff 392199.Dec 6 2021, 3:27 PM

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compiler-rt/
lib/
asan/
207 lines

Diff 392201

compiler-rt/lib/asan/asan_mapping.h

//===-- asan_mapping.h ------------------------------------------*- C++ -*-===// //===-- asan_mapping.h ------------------------------------------*- C++ -*-===//
// //
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information. // See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// //
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// //
// This file is a part of AddressSanitizer, an address sanity checker. // This file is a part of AddressSanitizer, an address sanity checker.
// //
// Defines ASan memory mapping. // Defines ASan memory mapping.
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
#ifndef ASAN_MAPPING_H #ifndef ASAN_MAPPING_H
#define ASAN_MAPPING_H #define ASAN_MAPPING_H
#include "asan_internal.h" #include "asan_internal.h"
#include "asan_shadow_defines.h"
// The full explanation of the memory mapping could be found here:
// https://github.com/google/sanitizers/wiki/AddressSanitizerAlgorithm
//
// Typical shadow mapping on Linux/x86_64 with SHADOW_OFFSET == 0x00007fff8000:
// || `[0x10007fff8000, 0x7fffffffffff]` || HighMem ||
// || `[0x02008fff7000, 0x10007fff7fff]` || HighShadow ||
// || `[0x00008fff7000, 0x02008fff6fff]` || ShadowGap ||
// || `[0x00007fff8000, 0x00008fff6fff]` || LowShadow ||
// || `[0x000000000000, 0x00007fff7fff]` || LowMem ||
//
// When SHADOW_OFFSET is zero (-pie):
// || `[0x100000000000, 0x7fffffffffff]` || HighMem ||
// || `[0x020000000000, 0x0fffffffffff]` || HighShadow ||
// || `[0x000000040000, 0x01ffffffffff]` || ShadowGap ||
//
// Special case when something is already mapped between
// 0x003000000000 and 0x005000000000 (e.g. when prelink is installed):
// || `[0x10007fff8000, 0x7fffffffffff]` || HighMem ||
// || `[0x02008fff7000, 0x10007fff7fff]` || HighShadow ||
// || `[0x005000000000, 0x02008fff6fff]` || ShadowGap3 ||
// || `[0x003000000000, 0x004fffffffff]` || MidMem ||
// || `[0x000a7fff8000, 0x002fffffffff]` || ShadowGap2 ||
// || `[0x00067fff8000, 0x000a7fff7fff]` || MidShadow ||
// || `[0x00008fff7000, 0x00067fff7fff]` || ShadowGap ||
// || `[0x00007fff8000, 0x00008fff6fff]` || LowShadow ||
// || `[0x000000000000, 0x00007fff7fff]` || LowMem ||
//
// Default Linux/i386 mapping on x86_64 machine:
// || `[0x40000000, 0xffffffff]` || HighMem ||
// || `[0x28000000, 0x3fffffff]` || HighShadow ||
// || `[0x24000000, 0x27ffffff]` || ShadowGap ||
// || `[0x20000000, 0x23ffffff]` || LowShadow ||
// || `[0x00000000, 0x1fffffff]` || LowMem ||
//
// Default Linux/i386 mapping on i386 machine
// (addresses starting with 0xc0000000 are reserved
// for kernel and thus not sanitized):
// || `[0x38000000, 0xbfffffff]` || HighMem ||
// || `[0x27000000, 0x37ffffff]` || HighShadow ||
// || `[0x24000000, 0x26ffffff]` || ShadowGap ||
// || `[0x20000000, 0x23ffffff]` || LowShadow ||
// || `[0x00000000, 0x1fffffff]` || LowMem ||
//
// Default Linux/MIPS32 mapping:
// || `[0x2aaa0000, 0xffffffff]` || HighMem ||
// || `[0x0fff4000, 0x2aa9ffff]` || HighShadow ||
// || `[0x0bff4000, 0x0fff3fff]` || ShadowGap ||
// || `[0x0aaa0000, 0x0bff3fff]` || LowShadow ||
// || `[0x00000000, 0x0aa9ffff]` || LowMem ||
//
// Default Linux/MIPS64 mapping:
// || `[0x4000000000, 0xffffffffff]` || HighMem ||
// || `[0x2800000000, 0x3fffffffff]` || HighShadow ||
// || `[0x2400000000, 0x27ffffffff]` || ShadowGap ||
// || `[0x2000000000, 0x23ffffffff]` || LowShadow ||
// || `[0x0000000000, 0x1fffffffff]` || LowMem ||
//
// Default Linux/RISCV64 Sv39 mapping:
// || `[0x1555550000, 0x3fffffffff]` || HighMem ||
// || `[0x0fffffa000, 0x1555555fff]` || HighShadow ||
// || `[0x0effffa000, 0x0fffff9fff]` || ShadowGap ||
// || `[0x0d55550000, 0x0effff9fff]` || LowShadow ||
// || `[0x0000000000, 0x0d5554ffff]` || LowMem ||
//
// Default Linux/AArch64 (39-bit VMA) mapping:
// || `[0x2000000000, 0x7fffffffff]` || highmem ||
// || `[0x1400000000, 0x1fffffffff]` || highshadow ||
// || `[0x1200000000, 0x13ffffffff]` || shadowgap ||
// || `[0x1000000000, 0x11ffffffff]` || lowshadow ||
// || `[0x0000000000, 0x0fffffffff]` || lowmem ||
//
// Default Linux/AArch64 (42-bit VMA) mapping:
// || `[0x10000000000, 0x3ffffffffff]` || highmem ||
// || `[0x0a000000000, 0x0ffffffffff]` || highshadow ||
// || `[0x09000000000, 0x09fffffffff]` || shadowgap ||
// || `[0x08000000000, 0x08fffffffff]` || lowshadow ||
// || `[0x00000000000, 0x07fffffffff]` || lowmem ||
//
// Default Linux/S390 mapping:
// || `[0x30000000, 0x7fffffff]` || HighMem ||
// || `[0x26000000, 0x2fffffff]` || HighShadow ||
// || `[0x24000000, 0x25ffffff]` || ShadowGap ||
// || `[0x20000000, 0x23ffffff]` || LowShadow ||
// || `[0x00000000, 0x1fffffff]` || LowMem ||
//
// Default Linux/SystemZ mapping:
// || `[0x14000000000000, 0x1fffffffffffff]` || HighMem ||
// || `[0x12800000000000, 0x13ffffffffffff]` || HighShadow ||
// || `[0x12000000000000, 0x127fffffffffff]` || ShadowGap ||
// || `[0x10000000000000, 0x11ffffffffffff]` || LowShadow ||
// || `[0x00000000000000, 0x0fffffffffffff]` || LowMem ||
//
// Default Linux/SPARC64 (52-bit VMA) mapping:
// || `[0x8000000000000, 0xfffffffffffff]` || HighMem ||
// || `[0x1080000000000, 0x207ffffffffff]` || HighShadow ||
// || `[0x0090000000000, 0x107ffffffffff]` || ShadowGap ||
// || `[0x0080000000000, 0x008ffffffffff]` || LowShadow ||
// || `[0x0000000000000, 0x007ffffffffff]` || LowMem ||
//
// Shadow mapping on FreeBSD/x86-64 with SHADOW_OFFSET == 0x400000000000:
// || `[0x500000000000, 0x7fffffffffff]` || HighMem ||
// || `[0x4a0000000000, 0x4fffffffffff]` || HighShadow ||
// || `[0x480000000000, 0x49ffffffffff]` || ShadowGap ||
// || `[0x400000000000, 0x47ffffffffff]` || LowShadow ||
// || `[0x000000000000, 0x3fffffffffff]` || LowMem ||
//
// Shadow mapping on FreeBSD/i386 with SHADOW_OFFSET == 0x40000000:
// || `[0x60000000, 0xffffffff]` || HighMem ||
// || `[0x4c000000, 0x5fffffff]` || HighShadow ||
// || `[0x48000000, 0x4bffffff]` || ShadowGap ||
// || `[0x40000000, 0x47ffffff]` || LowShadow ||
// || `[0x00000000, 0x3fffffff]` || LowMem ||
//
// Shadow mapping on NetBSD/x86-64 with SHADOW_OFFSET == 0x400000000000:
// || `[0x4feffffffe01, 0x7f7ffffff000]` || HighMem ||
// || `[0x49fdffffffc0, 0x4feffffffe00]` || HighShadow ||
// || `[0x480000000000, 0x49fdffffffbf]` || ShadowGap ||
// || `[0x400000000000, 0x47ffffffffff]` || LowShadow ||
// || `[0x000000000000, 0x3fffffffffff]` || LowMem ||
//
// Shadow mapping on NetBSD/i386 with SHADOW_OFFSET == 0x40000000:
// || `[0x60000000, 0xfffff000]` || HighMem ||
// || `[0x4c000000, 0x5fffffff]` || HighShadow ||
// || `[0x48000000, 0x4bffffff]` || ShadowGap ||
// || `[0x40000000, 0x47ffffff]` || LowShadow ||
// || `[0x00000000, 0x3fffffff]` || LowMem ||
//
// Default Windows/i386 mapping:
// (the exact location of HighShadow/HighMem may vary depending
// on WoW64, /LARGEADDRESSAWARE, etc).
// || `[0x50000000, 0xffffffff]` || HighMem ||
// || `[0x3a000000, 0x4fffffff]` || HighShadow ||
// || `[0x36000000, 0x39ffffff]` || ShadowGap ||
// || `[0x30000000, 0x35ffffff]` || LowShadow ||
// || `[0x00000000, 0x2fffffff]` || LowMem ||
#if defined(ASAN_SHADOW_SCALE) #if defined(ASAN_SHADOW_SCALE)
static const u64 kDefaultShadowScale = ASAN_SHADOW_SCALE; static const u64 kDefaultShadowScale = ASAN_SHADOW_SCALE;
#else #else
static const u64 kDefaultShadowScale = 3; static const u64 kDefaultShadowScale = 3;
#endif #endif
static const u64 kDefaultShadowSentinel = ~(uptr)0; static const u64 kDefaultShadowSentinel = ~(uptr)0;
static const u64 kDefaultShadowOffset32 = 1ULL << 29; // 0x20000000
static const u64 kDefaultShadowOffset64 = 1ULL << 44; // 0x100000000000
static const u64 kDefaultShort64bitShadowOffset =
0x7FFFFFFF & (~0xFFFULL << kDefaultShadowScale); // < 2G.
static const u64 kAArch64_ShadowOffset64 = 1ULL << 36; // 0x1000000000
static const u64 kRiscv64_ShadowOffset64 = 0xd55550000;
static const u64 kMIPS32_ShadowOffset32 = 0x0aaa0000;
static const u64 kMIPS64_ShadowOffset64 = 1ULL << 37; // 0x2000000000
static const u64 kPPC64_ShadowOffset64 = 1ULL << 44; // 0x100000000000
static const u64 kSystemZ_ShadowOffset64 = 1ULL << 52; // 0x10000000000000
static const u64 kSPARC64_ShadowOffset64 = 1ULL << 43; // 0x80000000000
static const u64 kFreeBSD_ShadowOffset32 = 1ULL << 30; // 0x40000000
static const u64 kFreeBSD_ShadowOffset64 = 1ULL << 46; // 0x400000000000
static const u64 kNetBSD_ShadowOffset32 = 1ULL << 30; // 0x40000000
static const u64 kNetBSD_ShadowOffset64 = 1ULL << 46; // 0x400000000000
static const u64 kWindowsShadowOffset32 = 3ULL << 28; // 0x30000000
#if defined(SHADOW_OFFSET_CONST) #define SHADOW_SCALE kDefaultShadowScale
static const u64 kConstShadowOffset = SHADOW_OFFSET_CONST;
# define SHADOW_OFFSET kConstShadowOffset #if SANITIZER_FUCHSIA
# define SHADOW_OFFSET (0)
#elif SANITIZER_WORDSIZE == 32
# if SANITIZER_ANDROID
# define SHADOW_OFFSET __asan_shadow_memory_dynamic_address
# elif defined(__mips__)
# define SHADOW_OFFSET kMIPS32_ShadowOffset32
# elif SANITIZER_FREEBSD
# define SHADOW_OFFSET kFreeBSD_ShadowOffset32
# elif SANITIZER_NETBSD
# define SHADOW_OFFSET kNetBSD_ShadowOffset32
# elif SANITIZER_WINDOWS
# define SHADOW_OFFSET kWindowsShadowOffset32
# elif SANITIZER_IOS
# define SHADOW_OFFSET __asan_shadow_memory_dynamic_address
#else # else
# define SHADOW_OFFSET kDefaultShadowOffset32
# endif
#else
# if SANITIZER_IOS
# define SHADOW_OFFSET __asan_shadow_memory_dynamic_address
# elif SANITIZER_MAC && defined(__aarch64__)
# define SHADOW_OFFSET __asan_shadow_memory_dynamic_address
# elif SANITIZER_RISCV64
# define SHADOW_OFFSET kRiscv64_ShadowOffset64
# elif defined(__aarch64__)
# define SHADOW_OFFSET kAArch64_ShadowOffset64
# elif defined(__powerpc64__)
# define SHADOW_OFFSET kPPC64_ShadowOffset64
# elif defined(__s390x__)
# define SHADOW_OFFSET kSystemZ_ShadowOffset64
# elif SANITIZER_FREEBSD
# define SHADOW_OFFSET kFreeBSD_ShadowOffset64
# elif SANITIZER_NETBSD
# define SHADOW_OFFSET kNetBSD_ShadowOffset64
# elif SANITIZER_MAC
# define SHADOW_OFFSET kDefaultShadowOffset64
# elif defined(__mips64)
# define SHADOW_OFFSET kMIPS64_ShadowOffset64
# elif defined(__sparc__)
# define SHADOW_OFFSET kSPARC64_ShadowOffset64
# elif SANITIZER_WINDOWS64
# define SHADOW_OFFSET __asan_shadow_memory_dynamic_address # define SHADOW_OFFSET __asan_shadow_memory_dynamic_address
# else
# define SHADOW_OFFSET kDefaultShort64bitShadowOffset
# endif
#endif #endif
#define SHADOW_SCALE kDefaultShadowScale
#if SANITIZER_ANDROID && defined(__arm__) #if SANITIZER_ANDROID && defined(__arm__)
# define ASAN_PREMAP_SHADOW 1 # define ASAN_PREMAP_SHADOW 1
#else #else
# define ASAN_PREMAP_SHADOW 0 # define ASAN_PREMAP_SHADOW 0
#endif #endif
#define SHADOW_GRANULARITY (1ULL << SHADOW_SCALE) #define SHADOW_GRANULARITY (1ULL << SHADOW_SCALE)
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compiler-rt/lib/asan/asan_shadow_defines.h

  • This file was deleted.
//===-- asan_shadow_defines.h -----------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is a part of AddressSanitizer, an address sanity checker.
//
// Defines ASan memory mapping used by assembly portion.
//===----------------------------------------------------------------------===//
#include "sanitizer_common/sanitizer_platform.h"
// The full explanation of the memory mapping could be found here:
// https://github.com/google/sanitizers/wiki/AddressSanitizerAlgorithm
//
// Typical shadow mapping on Linux/x86_64 with SHADOW_OFFSET == 0x00007fff8000:
// || `[0x10007fff8000, 0x7fffffffffff]` || HighMem ||
// || `[0x02008fff7000, 0x10007fff7fff]` || HighShadow ||
// || `[0x00008fff7000, 0x02008fff6fff]` || ShadowGap ||
// || `[0x00007fff8000, 0x00008fff6fff]` || LowShadow ||
// || `[0x000000000000, 0x00007fff7fff]` || LowMem ||
//
// When SHADOW_OFFSET is zero (-pie):
// || `[0x100000000000, 0x7fffffffffff]` || HighMem ||
// || `[0x020000000000, 0x0fffffffffff]` || HighShadow ||
// || `[0x000000040000, 0x01ffffffffff]` || ShadowGap ||
//
// Special case when something is already mapped between
// 0x003000000000 and 0x005000000000 (e.g. when prelink is installed):
// || `[0x10007fff8000, 0x7fffffffffff]` || HighMem ||
// || `[0x02008fff7000, 0x10007fff7fff]` || HighShadow ||
// || `[0x005000000000, 0x02008fff6fff]` || ShadowGap3 ||
// || `[0x003000000000, 0x004fffffffff]` || MidMem ||
// || `[0x000a7fff8000, 0x002fffffffff]` || ShadowGap2 ||
// || `[0x00067fff8000, 0x000a7fff7fff]` || MidShadow ||
// || `[0x00008fff7000, 0x00067fff7fff]` || ShadowGap ||
// || `[0x00007fff8000, 0x00008fff6fff]` || LowShadow ||
// || `[0x000000000000, 0x00007fff7fff]` || LowMem ||
//
// Default Linux/i386 mapping on x86_64 machine:
// || `[0x40000000, 0xffffffff]` || HighMem ||
// || `[0x28000000, 0x3fffffff]` || HighShadow ||
// || `[0x24000000, 0x27ffffff]` || ShadowGap ||
// || `[0x20000000, 0x23ffffff]` || LowShadow ||
// || `[0x00000000, 0x1fffffff]` || LowMem ||
//
// Default Linux/i386 mapping on i386 machine
// (addresses starting with 0xc0000000 are reserved
// for kernel and thus not sanitized):
// || `[0x38000000, 0xbfffffff]` || HighMem ||
// || `[0x27000000, 0x37ffffff]` || HighShadow ||
// || `[0x24000000, 0x26ffffff]` || ShadowGap ||
// || `[0x20000000, 0x23ffffff]` || LowShadow ||
// || `[0x00000000, 0x1fffffff]` || LowMem ||
//
// Default Linux/MIPS32 mapping:
// || `[0x2aaa0000, 0xffffffff]` || HighMem ||
// || `[0x0fff4000, 0x2aa9ffff]` || HighShadow ||
// || `[0x0bff4000, 0x0fff3fff]` || ShadowGap ||
// || `[0x0aaa0000, 0x0bff3fff]` || LowShadow ||
// || `[0x00000000, 0x0aa9ffff]` || LowMem ||
//
// Default Linux/MIPS64 mapping:
// || `[0x4000000000, 0xffffffffff]` || HighMem ||
// || `[0x2800000000, 0x3fffffffff]` || HighShadow ||
// || `[0x2400000000, 0x27ffffffff]` || ShadowGap ||
// || `[0x2000000000, 0x23ffffffff]` || LowShadow ||
// || `[0x0000000000, 0x1fffffffff]` || LowMem ||
//
// Default Linux/RISCV64 Sv39 mapping:
// || `[0x1555550000, 0x3fffffffff]` || HighMem ||
// || `[0x0fffffa000, 0x1555555fff]` || HighShadow ||
// || `[0x0effffa000, 0x0fffff9fff]` || ShadowGap ||
// || `[0x0d55550000, 0x0effff9fff]` || LowShadow ||
// || `[0x0000000000, 0x0d5554ffff]` || LowMem ||
//
// Default Linux/AArch64 (39-bit VMA) mapping:
// || `[0x2000000000, 0x7fffffffff]` || highmem ||
// || `[0x1400000000, 0x1fffffffff]` || highshadow ||
// || `[0x1200000000, 0x13ffffffff]` || shadowgap ||
// || `[0x1000000000, 0x11ffffffff]` || lowshadow ||
// || `[0x0000000000, 0x0fffffffff]` || lowmem ||
//
// Default Linux/AArch64 (42-bit VMA) mapping:
// || `[0x10000000000, 0x3ffffffffff]` || highmem ||
// || `[0x0a000000000, 0x0ffffffffff]` || highshadow ||
// || `[0x09000000000, 0x09fffffffff]` || shadowgap ||
// || `[0x08000000000, 0x08fffffffff]` || lowshadow ||
// || `[0x00000000000, 0x07fffffffff]` || lowmem ||
//
// Default Linux/S390 mapping:
// || `[0x30000000, 0x7fffffff]` || HighMem ||
// || `[0x26000000, 0x2fffffff]` || HighShadow ||
// || `[0x24000000, 0x25ffffff]` || ShadowGap ||
// || `[0x20000000, 0x23ffffff]` || LowShadow ||
// || `[0x00000000, 0x1fffffff]` || LowMem ||
//
// Default Linux/SystemZ mapping:
// || `[0x14000000000000, 0x1fffffffffffff]` || HighMem ||
// || `[0x12800000000000, 0x13ffffffffffff]` || HighShadow ||
// || `[0x12000000000000, 0x127fffffffffff]` || ShadowGap ||
// || `[0x10000000000000, 0x11ffffffffffff]` || LowShadow ||
// || `[0x00000000000000, 0x0fffffffffffff]` || LowMem ||
//
// Default Linux/SPARC64 (52-bit VMA) mapping:
// || `[0x8000000000000, 0xfffffffffffff]` || HighMem ||
// || `[0x1080000000000, 0x207ffffffffff]` || HighShadow ||
// || `[0x0090000000000, 0x107ffffffffff]` || ShadowGap ||
// || `[0x0080000000000, 0x008ffffffffff]` || LowShadow ||
// || `[0x0000000000000, 0x007ffffffffff]` || LowMem ||
//
// Shadow mapping on FreeBSD/x86-64 with SHADOW_OFFSET == 0x400000000000:
// || `[0x500000000000, 0x7fffffffffff]` || HighMem ||
// || `[0x4a0000000000, 0x4fffffffffff]` || HighShadow ||
// || `[0x480000000000, 0x49ffffffffff]` || ShadowGap ||
// || `[0x400000000000, 0x47ffffffffff]` || LowShadow ||
// || `[0x000000000000, 0x3fffffffffff]` || LowMem ||
//
// Shadow mapping on FreeBSD/i386 with SHADOW_OFFSET == 0x40000000:
// || `[0x60000000, 0xffffffff]` || HighMem ||
// || `[0x4c000000, 0x5fffffff]` || HighShadow ||
// || `[0x48000000, 0x4bffffff]` || ShadowGap ||
// || `[0x40000000, 0x47ffffff]` || LowShadow ||
// || `[0x00000000, 0x3fffffff]` || LowMem ||
//
// Shadow mapping on NetBSD/x86-64 with SHADOW_OFFSET == 0x400000000000:
// || `[0x4feffffffe01, 0x7f7ffffff000]` || HighMem ||
// || `[0x49fdffffffc0, 0x4feffffffe00]` || HighShadow ||
// || `[0x480000000000, 0x49fdffffffbf]` || ShadowGap ||
// || `[0x400000000000, 0x47ffffffffff]` || LowShadow ||
// || `[0x000000000000, 0x3fffffffffff]` || LowMem ||
//
// Shadow mapping on NetBSD/i386 with SHADOW_OFFSET == 0x40000000:
// || `[0x60000000, 0xfffff000]` || HighMem ||
// || `[0x4c000000, 0x5fffffff]` || HighShadow ||
// || `[0x48000000, 0x4bffffff]` || ShadowGap ||
// || `[0x40000000, 0x47ffffff]` || LowShadow ||
// || `[0x00000000, 0x3fffffff]` || LowMem ||
//
// Default Windows/i386 mapping:
// (the exact location of HighShadow/HighMem may vary depending
// on WoW64, /LARGEADDRESSAWARE, etc).
// || `[0x50000000, 0xffffffff]` || HighMem ||
// || `[0x3a000000, 0x4fffffff]` || HighShadow ||
// || `[0x36000000, 0x39ffffff]` || ShadowGap ||
// || `[0x30000000, 0x35ffffff]` || LowShadow ||
// || `[0x00000000, 0x2fffffff]` || LowMem ||
#if !defined(SANITIZER_WORDSIZE)
# error "SANITIZER_WORDSIZE must be defined."
#endif
#if SANITIZER_FUCHSIA
# define SHADOW_OFFSET_CONST 0x0
#elif SANITIZER_WORDSIZE == 32
# if defined(__mips__)
# define SHADOW_OFFSET_CONST 0xaaa0000
# elif SANITIZER_FREEBSD
# define SHADOW_OFFSET_CONST 0x40000000
# elif SANITIZER_NETBSD
# define SHADOW_OFFSET_CONST 0x40000000
# elif SANITIZER_WINDOWS
# define SHADOW_OFFSET_CONST 0x30000000
# else
# define SHADOW_OFFSET_CONST 0x20000000
# endif
#elif SANITIZER_WORDSIZE == 64
# if SANITIZER_RISCV64
# define SHADOW_OFFSET_CONST 0x0d55550000
# elif defined(__aarch64__)
# define SHADOW_OFFSET_CONST 0x1000000000
# elif defined(__powerpc64__)
# define SHADOW_OFFSET_CONST 0x100000000000
# elif defined(__s390x__)
# define SHADOW_OFFSET_CONST 0x10000000000000
# elif SANITIZER_FREEBSD
# define SHADOW_OFFSET_CONST 0x400000000000
# elif SANITIZER_NETBSD
# define SHADOW_OFFSET_CONST 0x400000000000
# elif SANITIZER_MAC
# define SHADOW_OFFSET_CONST 0x100000000000
# elif defined(__mips64)
# define SHADOW_OFFSET_CONST 0x02000000000
# elif defined(__sparc__)
# define SHADOW_OFFSET_CONST 0x80000000000
# else
# if defined(ASAN_SHADOW_SCALE) && (ASAN_SHADOW_SCALE != 3)
# error "Only ASAN_SHADOW_SCALE = 3 is supported."
# endif
# define SHADOW_OFFSET_CONST 0x7fff8000
# endif
#endif
compiler-rt/lib/asan/asan_mapping.h