asan_internal.h revision 7ed1d2b699767dd1875994cb625d51a95b44221a
1583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o//===-- asan_internal.h -----------------------------------------*- C++ -*-===// 2583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// 3583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// The LLVM Compiler Infrastructure 4583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// 5583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// This file is distributed under the University of Illinois Open Source 6583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// License. See LICENSE.TXT for details. 7583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// 8583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o//===----------------------------------------------------------------------===// 9583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// 10583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// This file is a part of AddressSanitizer, an address sanity checker. 11583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// 12583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// ASan-private header which defines various general utilities. 13583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o//===----------------------------------------------------------------------===// 14583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#ifndef ASAN_INTERNAL_H 15583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#define ASAN_INTERNAL_H 16583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 17583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#include "asan_flags.h" 18583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#include "sanitizer_common/sanitizer_common.h" 19583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#include "sanitizer_common/sanitizer_internal_defs.h" 20583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#include "sanitizer_common/sanitizer_libc.h" 21583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 22583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#if !defined(__linux__) && !defined(__APPLE__) && !defined(_WIN32) 23583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# error "This operating system is not supported by AddressSanitizer" 24583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#endif 25583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 26583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#if defined(_WIN32) 27583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'oextern "C" void* _ReturnAddress(void); 28583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# pragma intrinsic(_ReturnAddress) 29583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#endif // defined(_WIN32) 30583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 31efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o#define ASAN_DEFAULT_FAILURE_EXITCODE 1 32583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 33583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#if defined(__linux__) 34583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# define ASAN_LINUX 1 35583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#else 36583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# define ASAN_LINUX 0 37583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#endif 38583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 39efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o#if defined(__APPLE__) 40583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# define ASAN_MAC 1 41583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#else 42583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# define ASAN_MAC 0 43efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o#endif 44583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 45583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#if defined(_WIN32) 46583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# define ASAN_WINDOWS 1 47583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#else 48583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# define ASAN_WINDOWS 0 49583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#endif 50583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 51583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#define ASAN_POSIX (ASAN_LINUX || ASAN_MAC) 52583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 53efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o#if __has_feature(address_sanitizer) 54583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# error "The AddressSanitizer run-time should not be" 55583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o " instrumented by AddressSanitizer" 56583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#endif 57583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 58583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// Build-time configuration options. 59583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 60583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// If set, asan will install its own SEGV signal handler. 61583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#ifndef ASAN_NEEDS_SEGV 62583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# define ASAN_NEEDS_SEGV 1 63583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#endif 64583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 65583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// If set, asan will intercept C++ exception api call(s). 66583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#ifndef ASAN_HAS_EXCEPTIONS 67583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# define ASAN_HAS_EXCEPTIONS 1 68583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#endif 69efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o 70583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// If set, asan uses the values of SHADOW_SCALE and SHADOW_OFFSET 71583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// provided by the instrumented objects. Otherwise constants are used. 72583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#ifndef ASAN_FLEXIBLE_MAPPING_AND_OFFSET 73583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# define ASAN_FLEXIBLE_MAPPING_AND_OFFSET 0 74583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#endif 75583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 76583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// If set, values like allocator chunk size, as well as defaults for some flags 77583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// will be changed towards less memory overhead. 78583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#ifndef ASAN_LOW_MEMORY 79583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# define ASAN_LOW_MEMORY 0 80583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#endif 81583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 82583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// All internal functions in asan reside inside the __asan namespace 83583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// to avoid namespace collisions with the user programs. 84583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// Seperate namespace also makes it simpler to distinguish the asan run-time 85efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o// functions from the instrumented user code in a profile. 86583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'onamespace __asan { 87583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 88583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'oclass AsanThread; 89583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'ostruct AsanStackTrace; 90583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 91efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o// asan_rtl.cc 92583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'ovoid NORETURN ShowStatsAndAbort(); 93583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 94efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o// asan_globals.cc 95efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'obool DescribeAddrIfGlobal(uptr addr); 96583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 97efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'ovoid ReplaceOperatorsNewAndDelete(); 98583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// asan_malloc_linux.cc / asan_malloc_mac.cc 99583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'ovoid ReplaceSystemMalloc(); 100583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 101583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// asan_linux.cc / asan_mac.cc / asan_win.cc 102efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'ovoid *AsanDoesNotSupportStaticLinkage(); 103583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 104583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'ovoid GetPcSpBp(void *context, uptr *pc, uptr *sp, uptr *bp); 105583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 106583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'obool AsanInterceptsSignal(int signum); 107583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'ovoid SetAlternateSignalStack(); 108583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'ovoid UnsetAlternateSignalStack(); 109583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'ovoid InstallSignalHandlers(); 110583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 111efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o// Wrapper for TLS/TSD. 112583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'ovoid AsanTSDInit(void (*destructor)(void *tsd)); 113583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'ovoid *AsanTSDGet(); 114583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'ovoid AsanTSDSet(void *tsd); 115583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 116583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'ovoid AppendToErrorMessageBuffer(const char *buffer); 117efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o// asan_printf.cc 118583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'ovoid AsanPrintf(const char *format, ...); 119583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'ovoid AsanReport(const char *format, ...); 120efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o 121efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o// asan_poisoning.cc 122583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// Poisons the shadow memory for "size" bytes starting from "addr". 123efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'ovoid PoisonShadow(uptr addr, uptr size, u8 value); 124583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// Poisons the shadow memory for "redzone_size" bytes starting from 125583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// "addr + size". 126583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'ovoid PoisonShadowPartialRightRedzone(uptr addr, 127583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o uptr size, 128efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o uptr redzone_size, 129583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o u8 value); 130583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 131583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// Platfrom-specific options. 132583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#ifdef __APPLE__ 133583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'obool PlatformHasDifferentMemcpyAndMemmove(); 134583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# define PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE \ 135583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o (PlatformHasDifferentMemcpyAndMemmove()) 136583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#else 137583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# define PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE true 138efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o#endif // __APPLE__ 139583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 140583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'oextern int asan_inited; 141583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// Used to avoid infinite recursion in __asan_init(). 142583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'oextern bool asan_init_is_running; 143583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'oextern void (*death_callback)(void); 144583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 145583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'oenum LinkerInitialized { LINKER_INITIALIZED = 0 }; 146583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 147583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#define ASAN_ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0])) 148583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 149583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#if !defined(_WIN32) || defined(__clang__) 150efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o# define GET_CALLER_PC() (uptr)__builtin_return_address(0) 151583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# define GET_CURRENT_FRAME() (uptr)__builtin_frame_address(0) 152583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#else 153583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# define GET_CALLER_PC() (uptr)_ReturnAddress() 154583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// CaptureStackBackTrace doesn't need to know BP on Windows. 155efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o// FIXME: This macro is still used when printing error reports though it's not 156583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// clear if the BP value is needed in the ASan reports on Windows. 157583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# define GET_CURRENT_FRAME() (uptr)0xDEADBEEF 158583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#endif 159583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 160583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#ifdef _WIN32 161583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# ifndef ASAN_USE_EXTERNAL_SYMBOLIZER 162583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# define ASAN_USE_EXTERNAL_SYMBOLIZER __asan_WinSymbolize 163583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'obool __asan_WinSymbolize(const void *addr, char *out_buffer, int buffer_size); 164583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o# endif 165583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#endif // _WIN32 166583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 167583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// These magic values are written to shadow for better error reporting. 168efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'oconst int kAsanHeapLeftRedzoneMagic = 0xfa; 169583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'oconst int kAsanHeapRightRedzoneMagic = 0xfb; 170583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'oconst int kAsanHeapFreeMagic = 0xfd; 171583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'oconst int kAsanStackLeftRedzoneMagic = 0xf1; 172583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'oconst int kAsanStackMidRedzoneMagic = 0xf2; 173583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'oconst int kAsanStackRightRedzoneMagic = 0xf3; 174583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'oconst int kAsanStackPartialRedzoneMagic = 0xf4; 175583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'oconst int kAsanStackAfterReturnMagic = 0xf5; 176583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'oconst int kAsanUserPoisonedMemoryMagic = 0xf7; 177583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'oconst int kAsanGlobalRedzoneMagic = 0xf9; 178583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'oconst int kAsanInternalHeapMagic = 0xfe; 179583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 180583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'ostatic const uptr kCurrentStackFrameMagic = 0x41B58AB3; 181583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'ostatic const uptr kRetiredStackFrameMagic = 0x45E0360E; 182583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 183583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// -------------------------- LowLevelAllocator ----- {{{1 184583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o// A simple low-level memory allocator for internal use. 185583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'oclass LowLevelAllocator { 186583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o public: 187583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o explicit LowLevelAllocator(LinkerInitialized) {} 188583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o // 'size' must be a power of two. 189583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o // Requires an external lock. 190583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o void *Allocate(uptr size); 191583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o private: 192583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o char *allocated_end_; 193efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o char *allocated_current_; 194583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o}; 195583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 196583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o} // namespace __asan 197583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o 198583a1ce5d1b225a6b01fc2b30a3bcb21fd0d48c9Theodore Ts'o#endif // ASAN_INTERNAL_H 199efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o