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 using namespace llvm::pdb; 23 24 PDBContext::PDBContext(const COFFObjectFile &Object, 25 std::unique_ptr<IPDBSession> PDBSession) 26 : DIContext(CK_PDB), Session(std::move(PDBSession)) { 27 ErrorOr<uint64_t> ImageBase = Object.getImageBase(); 28 if (ImageBase) 29 Session->setLoadAddress(ImageBase.get()); 30 } 31 32 void PDBContext::dump(raw_ostream &OS, DIDumpOptions DumpOpts){} 33 34 DILineInfo PDBContext::getLineInfoForAddress(uint64_t Address, 35 DILineInfoSpecifier Specifier) { 36 DILineInfo Result; 37 Result.FunctionName = getFunctionName(Address, Specifier.FNKind); 38 39 uint32_t Length = 1; 40 std::unique_ptr<PDBSymbol> Symbol = 41 Session->findSymbolByAddress(Address, PDB_SymType::None); 42 if (auto Func = dyn_cast_or_null<PDBSymbolFunc>(Symbol.get())) { 43 Length = Func->getLength(); 44 } else if (auto Data = dyn_cast_or_null<PDBSymbolData>(Symbol.get())) { 45 Length = Data->getLength(); 46 } 47 48 // If we couldn't find a symbol, then just assume 1 byte, so that we get 49 // only the line number of the first instruction. 50 auto LineNumbers = Session->findLineNumbersByAddress(Address, Length); 51 if (!LineNumbers || LineNumbers->getChildCount() == 0) 52 return Result; 53 54 auto LineInfo = LineNumbers->getNext(); 55 assert(LineInfo); 56 auto SourceFile = Session->getSourceFileById(LineInfo->getSourceFileId()); 57 58 if (SourceFile && 59 Specifier.FLIKind != DILineInfoSpecifier::FileLineInfoKind::None) 60 Result.FileName = SourceFile->getFileName(); 61 Result.Column = LineInfo->getColumnNumber(); 62 Result.Line = LineInfo->getLineNumber(); 63 return Result; 64 } 65 66 DILineInfoTable 67 PDBContext::getLineInfoForAddressRange(uint64_t Address, uint64_t Size, 68 DILineInfoSpecifier Specifier) { 69 if (Size == 0) 70 return DILineInfoTable(); 71 72 DILineInfoTable Table; 73 auto LineNumbers = Session->findLineNumbersByAddress(Address, Size); 74 if (!LineNumbers || LineNumbers->getChildCount() == 0) 75 return Table; 76 77 while (auto LineInfo = LineNumbers->getNext()) { 78 DILineInfo LineEntry = 79 getLineInfoForAddress(LineInfo->getVirtualAddress(), Specifier); 80 Table.push_back(std::make_pair(LineInfo->getVirtualAddress(), LineEntry)); 81 } 82 return Table; 83 } 84 85 DIInliningInfo 86 PDBContext::getInliningInfoForAddress(uint64_t Address, 87 DILineInfoSpecifier Specifier) { 88 DIInliningInfo InlineInfo; 89 DILineInfo Frame = getLineInfoForAddress(Address, Specifier); 90 InlineInfo.addFrame(Frame); 91 return InlineInfo; 92 } 93 94 std::string PDBContext::getFunctionName(uint64_t Address, 95 DINameKind NameKind) const { 96 if (NameKind == DINameKind::None) 97 return std::string(); 98 99 std::unique_ptr<PDBSymbol> FuncSymbol = 100 Session->findSymbolByAddress(Address, PDB_SymType::Function); 101 auto *Func = dyn_cast_or_null<PDBSymbolFunc>(FuncSymbol.get()); 102 103 if (NameKind == DINameKind::LinkageName) { 104 // It is not possible to get the mangled linkage name through a 105 // PDBSymbolFunc. For that we have to specifically request a 106 // PDBSymbolPublicSymbol. 107 auto PublicSym = 108 Session->findSymbolByAddress(Address, PDB_SymType::PublicSymbol); 109 if (auto *PS = dyn_cast_or_null<PDBSymbolPublicSymbol>(PublicSym.get())) { 110 // If we also have a function symbol, prefer the use of public symbol name 111 // only if it refers to the same address. The public symbol uses the 112 // linkage name while the function does not. 113 if (!Func || Func->getVirtualAddress() == PS->getVirtualAddress()) 114 return PS->getName(); 115 } 116 } 117 118 return Func ? Func->getName() : std::string(); 119 } 120