1 //===-- ObjDumper.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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef LLVM_TOOLS_LLVM_READOBJ_OBJDUMPER_H 10 #define LLVM_TOOLS_LLVM_READOBJ_OBJDUMPER_H 11 12 #include <functional> 13 #include <memory> 14 #include <system_error> 15 16 #include "llvm/ADT/STLFunctionalExtras.h" 17 #include "llvm/ADT/SmallVector.h" 18 #include "llvm/ADT/StringMap.h" 19 #include "llvm/ADT/StringRef.h" 20 #include "llvm/Object/ObjectFile.h" 21 #include "llvm/Support/CommandLine.h" 22 23 #include <unordered_set> 24 25 namespace llvm { 26 namespace object { 27 class Archive; 28 class COFFImportFile; 29 class ObjectFile; 30 class XCOFFObjectFile; 31 class ELFObjectFileBase; 32 } // namespace object 33 namespace codeview { 34 class GlobalTypeTableBuilder; 35 class MergingTypeTableBuilder; 36 } // namespace codeview 37 38 class ScopedPrinter; 39 40 // Comparator to compare symbols. 41 // Usage: the caller registers predicates (i.e., how to compare the symbols) by 42 // calling addPredicate(). The order in which predicates are registered is also 43 // their priority. 44 class SymbolComparator { 45 public: 46 using CompPredicate = 47 std::function<bool(object::SymbolRef, object::SymbolRef)>; 48 49 // Each Obj format has a slightly different way of retrieving a symbol's info 50 // So we defer the predicate's impl to each format. 51 void addPredicate(CompPredicate Pred) { Predicates.push_back(Pred); } 52 53 bool operator()(object::SymbolRef LHS, object::SymbolRef RHS) { 54 for (CompPredicate Pred : Predicates) { 55 if (Pred(LHS, RHS)) 56 return true; 57 if (Pred(RHS, LHS)) 58 return false; 59 } 60 return false; 61 } 62 63 private: 64 SmallVector<CompPredicate, 2> Predicates; 65 }; 66 67 class ObjDumper { 68 public: 69 ObjDumper(ScopedPrinter &Writer, StringRef ObjName); 70 virtual ~ObjDumper(); 71 72 virtual bool canDumpContent() { return true; } 73 74 virtual void printFileSummary(StringRef FileStr, object::ObjectFile &Obj, 75 ArrayRef<std::string> InputFilenames, 76 const object::Archive *A); 77 virtual void printFileHeaders() = 0; 78 virtual void printSectionHeaders() = 0; 79 virtual void printRelocations() = 0; 80 virtual void printSymbols(bool PrintSymbols, bool PrintDynamicSymbols) { 81 if (PrintSymbols) 82 printSymbols(); 83 if (PrintDynamicSymbols) 84 printDynamicSymbols(); 85 } 86 virtual void printSymbols(bool PrintSymbols, bool PrintDynamicSymbols, 87 std::optional<SymbolComparator> SymComp) { 88 if (SymComp) { 89 if (PrintSymbols) 90 printSymbols(SymComp); 91 if (PrintDynamicSymbols) 92 printDynamicSymbols(SymComp); 93 } else { 94 printSymbols(PrintSymbols, PrintDynamicSymbols); 95 } 96 } 97 virtual void printProgramHeaders(bool PrintProgramHeaders, 98 cl::boolOrDefault PrintSectionMapping) { 99 if (PrintProgramHeaders) 100 printProgramHeaders(); 101 if (PrintSectionMapping == cl::BOU_TRUE) 102 printSectionMapping(); 103 } 104 105 virtual void printUnwindInfo() = 0; 106 107 // Symbol comparison functions. 108 virtual bool canCompareSymbols() const { return false; } 109 virtual bool compareSymbolsByName(object::SymbolRef LHS, 110 object::SymbolRef RHS) const { 111 return true; 112 } 113 virtual bool compareSymbolsByType(object::SymbolRef LHS, 114 object::SymbolRef RHS) const { 115 return true; 116 } 117 118 // Only implemented for ELF at this time. 119 virtual void printDependentLibs() {} 120 virtual void printDynamicRelocations() { } 121 virtual void printDynamicTable() { } 122 virtual void printNeededLibraries() { } 123 virtual void printSectionAsHex(StringRef SectionName) {} 124 virtual void printHashTable() { } 125 virtual void printGnuHashTable() {} 126 virtual void printHashSymbols() {} 127 virtual void printLoadName() {} 128 virtual void printVersionInfo() {} 129 virtual void printGroupSections() {} 130 virtual void printHashHistograms() {} 131 virtual void printCGProfile() {} 132 virtual void printBBAddrMaps() {} 133 virtual void printAddrsig() {} 134 virtual void printNotes() {} 135 virtual void printELFLinkerOptions() {} 136 virtual void printStackSizes() {} 137 virtual void printSectionDetails() {} 138 virtual void printArchSpecificInfo() {} 139 140 // Only implemented for PE/COFF. 141 virtual void printCOFFImports() { } 142 virtual void printCOFFExports() { } 143 virtual void printCOFFDirectives() { } 144 virtual void printCOFFBaseReloc() { } 145 virtual void printCOFFDebugDirectory() { } 146 virtual void printCOFFTLSDirectory() {} 147 virtual void printCOFFResources() {} 148 virtual void printCOFFLoadConfig() { } 149 virtual void printCodeViewDebugInfo() { } 150 virtual void 151 mergeCodeViewTypes(llvm::codeview::MergingTypeTableBuilder &CVIDs, 152 llvm::codeview::MergingTypeTableBuilder &CVTypes, 153 llvm::codeview::GlobalTypeTableBuilder &GlobalCVIDs, 154 llvm::codeview::GlobalTypeTableBuilder &GlobalCVTypes, 155 bool GHash) {} 156 157 // Only implemented for XCOFF. 158 virtual void printStringTable() {} 159 virtual void printAuxiliaryHeader() {} 160 virtual void printExceptionSection() {} 161 virtual void printLoaderSection(bool PrintHeader, bool PrintSymbols, 162 bool PrintRelocations) {} 163 164 // Only implemented for MachO. 165 virtual void printMachODataInCode() { } 166 virtual void printMachOVersionMin() { } 167 virtual void printMachODysymtab() { } 168 virtual void printMachOSegment() { } 169 virtual void printMachOIndirectSymbols() { } 170 virtual void printMachOLinkerOptions() { } 171 172 virtual void printStackMap() const = 0; 173 174 void printAsStringList(StringRef StringContent, size_t StringDataOffset = 0); 175 176 void printSectionsAsString(const object::ObjectFile &Obj, 177 ArrayRef<std::string> Sections); 178 void printSectionsAsHex(const object::ObjectFile &Obj, 179 ArrayRef<std::string> Sections); 180 181 std::function<Error(const Twine &Msg)> WarningHandler; 182 void reportUniqueWarning(Error Err) const; 183 void reportUniqueWarning(const Twine &Msg) const; 184 185 protected: 186 ScopedPrinter &W; 187 188 private: 189 virtual void printSymbols() {} 190 virtual void printSymbols(std::optional<SymbolComparator> Comp) {} 191 virtual void printDynamicSymbols() {} 192 virtual void printDynamicSymbols(std::optional<SymbolComparator> Comp) {} 193 virtual void printProgramHeaders() {} 194 virtual void printSectionMapping() {} 195 196 std::unordered_set<std::string> Warnings; 197 }; 198 199 std::unique_ptr<ObjDumper> createCOFFDumper(const object::COFFObjectFile &Obj, 200 ScopedPrinter &Writer); 201 202 std::unique_ptr<ObjDumper> createELFDumper(const object::ELFObjectFileBase &Obj, 203 ScopedPrinter &Writer); 204 205 std::unique_ptr<ObjDumper> createMachODumper(const object::MachOObjectFile &Obj, 206 ScopedPrinter &Writer); 207 208 std::unique_ptr<ObjDumper> createWasmDumper(const object::WasmObjectFile &Obj, 209 ScopedPrinter &Writer); 210 211 std::unique_ptr<ObjDumper> createXCOFFDumper(const object::XCOFFObjectFile &Obj, 212 ScopedPrinter &Writer); 213 214 void dumpCOFFImportFile(const object::COFFImportFile *File, 215 ScopedPrinter &Writer); 216 217 void dumpCodeViewMergedTypes(ScopedPrinter &Writer, 218 ArrayRef<ArrayRef<uint8_t>> IpiRecords, 219 ArrayRef<ArrayRef<uint8_t>> TpiRecords); 220 221 } // namespace llvm 222 223 #endif 224