1 //===-- PDBContext.cpp ------------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===/ 9 10 #include "llvm/DebugInfo/PDB/PDBContext.h" 11 #include "llvm/DebugInfo/PDB/IPDBEnumChildren.h" 12 #include "llvm/DebugInfo/PDB/IPDBLineNumber.h" 13 #include "llvm/DebugInfo/PDB/IPDBSourceFile.h" 14 #include "llvm/DebugInfo/PDB/PDBSymbol.h" 15 #include "llvm/DebugInfo/PDB/PDBSymbolFunc.h" 16 #include "llvm/DebugInfo/PDB/PDBSymbolData.h" 17 #include "llvm/DebugInfo/PDB/PDBSymbolPublicSymbol.h" 18 #include "llvm/Object/COFF.h" 19 20 using namespace llvm; 21 using namespace llvm::object; 22 23 PDBContext::PDBContext(const COFFObjectFile &Object, 24 std::unique_ptr<IPDBSession> PDBSession) 25 : DIContext(CK_PDB), Session(std::move(PDBSession)) { 26 ErrorOr<uint64_t> ImageBase = Object.getImageBase(); 27 if (ImageBase) 28 Session->setLoadAddress(ImageBase.get()); 29 } 30 31 void PDBContext::dump(raw_ostream &OS, DIDumpType DumpType) {} 32 33 DILineInfo PDBContext::getLineInfoForAddress(uint64_t Address, 34 DILineInfoSpecifier Specifier) { 35 DILineInfo Result; 36 Result.FunctionName = getFunctionName(Address, Specifier.FNKind); 37 38 uint32_t Length = 1; 39 std::unique_ptr<PDBSymbol> Symbol = 40 Session->findSymbolByAddress(Address, PDB_SymType::None); 41 if (auto Func = dyn_cast_or_null<PDBSymbolFunc>(Symbol.get())) { 42 Length = Func->getLength(); 43 } else if (auto Data = dyn_cast_or_null<PDBSymbolData>(Symbol.get())) { 44 Length = Data->getLength(); 45 } 46 47 // If we couldn't find a symbol, then just assume 1 byte, so that we get 48 // only the line number of the first instruction. 49 auto LineNumbers = Session->findLineNumbersByAddress(Address, Length); 50 if (!LineNumbers || LineNumbers->getChildCount() == 0) 51 return Result; 52 53 auto LineInfo = LineNumbers->getNext(); 54 assert(LineInfo); 55 auto SourceFile = Session->getSourceFileById(LineInfo->getSourceFileId()); 56 57 if (SourceFile && 58 Specifier.FLIKind != DILineInfoSpecifier::FileLineInfoKind::None) 59 Result.FileName = SourceFile->getFileName(); 60 Result.Column = LineInfo->getColumnNumber(); 61 Result.Line = LineInfo->getLineNumber(); 62 return Result; 63 } 64 65 DILineInfoTable 66 PDBContext::getLineInfoForAddressRange(uint64_t Address, uint64_t Size, 67 DILineInfoSpecifier Specifier) { 68 if (Size == 0) 69 return DILineInfoTable(); 70 71 DILineInfoTable Table; 72 auto LineNumbers = Session->findLineNumbersByAddress(Address, Size); 73 if (!LineNumbers || LineNumbers->getChildCount() == 0) 74 return Table; 75 76 while (auto LineInfo = LineNumbers->getNext()) { 77 DILineInfo LineEntry = 78 getLineInfoForAddress(LineInfo->getVirtualAddress(), Specifier); 79 Table.push_back(std::make_pair(LineInfo->getVirtualAddress(), LineEntry)); 80 } 81 return Table; 82 } 83 84 DIInliningInfo 85 PDBContext::getInliningInfoForAddress(uint64_t Address, 86 DILineInfoSpecifier Specifier) { 87 DIInliningInfo InlineInfo; 88 DILineInfo Frame = getLineInfoForAddress(Address, Specifier); 89 InlineInfo.addFrame(Frame); 90 return InlineInfo; 91 } 92 93 std::string PDBContext::getFunctionName(uint64_t Address, 94 DINameKind NameKind) const { 95 if (NameKind == DINameKind::None) 96 return std::string(); 97 98 if (NameKind == DINameKind::LinkageName) { 99 // It is not possible to get the mangled linkage name through a 100 // PDBSymbolFunc. For that we have to specifically request a 101 // PDBSymbolPublicSymbol. 102 auto PublicSym = 103 Session->findSymbolByAddress(Address, PDB_SymType::PublicSymbol); 104 if (auto PS = dyn_cast_or_null<PDBSymbolPublicSymbol>(PublicSym.get())) 105 return PS->getName(); 106 } 107 108 auto FuncSymbol = 109 Session->findSymbolByAddress(Address, PDB_SymType::Function); 110 111 // This could happen either if there was no public symbol (e.g. not 112 // external) or the user requested the short name. In the former case, 113 // although they technically requested the linkage name, if the linkage 114 // name is not available we fallback to at least returning a non-empty 115 // string. 116 if (auto Func = dyn_cast_or_null<PDBSymbolFunc>(FuncSymbol.get())) 117 return Func->getName(); 118 119 return std::string(); 120 } 121