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1//===-- sanitizer_procmaps.h ------------------------------------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file is shared between AddressSanitizer and ThreadSanitizer.10//11// Information about the process mappings.12//===----------------------------------------------------------------------===//13#ifndef SANITIZER_PROCMAPS_H14#define SANITIZER_PROCMAPS_H15 16#include "sanitizer_platform.h"17 18#if SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD || \19 SANITIZER_APPLE || SANITIZER_SOLARIS || SANITIZER_HAIKU || \20 SANITIZER_FUCHSIA21 22#include "sanitizer_common.h"23#include "sanitizer_internal_defs.h"24#include "sanitizer_fuchsia.h"25#include "sanitizer_linux.h"26#include "sanitizer_mac.h"27#include "sanitizer_mutex.h"28 29namespace __sanitizer {30 31// Memory protection masks.32static const uptr kProtectionRead = 1;33static const uptr kProtectionWrite = 2;34static const uptr kProtectionExecute = 4;35static const uptr kProtectionShared = 8;36 37struct MemoryMappedSegmentData;38 39class MemoryMappedSegment {40 public:41 explicit MemoryMappedSegment(char *buff = nullptr, uptr size = 0)42 : filename(buff), filename_size(size), data_(nullptr) {}43 ~MemoryMappedSegment() {}44 45 bool IsReadable() const { return protection & kProtectionRead; }46 bool IsWritable() const { return protection & kProtectionWrite; }47 bool IsExecutable() const { return protection & kProtectionExecute; }48 bool IsShared() const { return protection & kProtectionShared; }49 50 void AddAddressRanges(LoadedModule *module);51 52 uptr start;53 uptr end;54 uptr offset;55 char *filename; // owned by caller56 uptr filename_size;57 uptr protection;58 ModuleArch arch;59 u8 uuid[kModuleUUIDSize];60 61 private:62 friend class MemoryMappingLayout;63 64 // This field is assigned and owned by MemoryMappingLayout if needed65 MemoryMappedSegmentData *data_;66};67 68struct ImageHeader;69 70class MemoryMappingLayoutBase {71 public:72 virtual bool Next(MemoryMappedSegment *segment) { UNIMPLEMENTED(); }73 virtual bool Error() const { UNIMPLEMENTED(); };74 virtual void Reset() { UNIMPLEMENTED(); }75 76 protected:77 ~MemoryMappingLayoutBase() {}78};79 80class MemoryMappingLayout : public MemoryMappingLayoutBase {81 public:82 explicit MemoryMappingLayout(bool cache_enabled);83 84// This destructor cannot be virtual, as it would cause an operator new() linking85// failures in hwasan test cases. However non-virtual destructors emit warnings86// in macOS build, hence disabling those87#ifdef __clang__88#pragma clang diagnostic push89#pragma clang diagnostic ignored "-Wnon-virtual-dtor"90#endif91 ~MemoryMappingLayout();92#ifdef __clang__93#pragma clang diagnostic pop94#endif95 96 virtual bool Next(MemoryMappedSegment *segment) override;97 virtual bool Error() const override;98 virtual void Reset() override;99 // In some cases, e.g. when running under a sandbox on Linux, ASan is unable100 // to obtain the memory mappings. It should fall back to pre-cached data101 // instead of aborting.102 static void CacheMemoryMappings();103 104 // Adds all mapped objects into a vector.105 void DumpListOfModules(InternalMmapVectorNoCtor<LoadedModule> *modules);106 107 protected:108#if SANITIZER_APPLE109 virtual const ImageHeader *CurrentImageHeader();110#endif111 MemoryMappingLayoutData data_;112 113 private:114 void LoadFromCache();115};116 117// Returns code range for the specified module.118bool GetCodeRangeForFile(const char *module, uptr *start, uptr *end);119 120bool IsDecimal(char c);121uptr ParseDecimal(const char **p);122bool IsHex(char c);123uptr ParseHex(const char **p);124 125} // namespace __sanitizer126 127#endif128#endif // SANITIZER_PROCMAPS_H129