1 //===-- PDBContext.cpp ------------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===/
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"
21 using namespace llvm::object;
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();
28 Session->setLoadAddress(ImageBase.get());
31 void PDBContext::dump(raw_ostream &OS, DIDumpType DumpType,
34 DILineInfo PDBContext::getLineInfoForAddress(uint64_t Address,
35 DILineInfoSpecifier Specifier) {
37 Result.FunctionName = getFunctionName(Address, Specifier.FNKind);
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();
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)
54 auto LineInfo = LineNumbers->getNext();
56 auto SourceFile = Session->getSourceFileById(LineInfo->getSourceFileId());
59 Specifier.FLIKind != DILineInfoSpecifier::FileLineInfoKind::None)
60 Result.FileName = SourceFile->getFileName();
61 Result.Column = LineInfo->getColumnNumber();
62 Result.Line = LineInfo->getLineNumber();
67 PDBContext::getLineInfoForAddressRange(uint64_t Address, uint64_t Size,
68 DILineInfoSpecifier Specifier) {
70 return DILineInfoTable();
72 DILineInfoTable Table;
73 auto LineNumbers = Session->findLineNumbersByAddress(Address, Size);
74 if (!LineNumbers || LineNumbers->getChildCount() == 0)
77 while (auto LineInfo = LineNumbers->getNext()) {
78 DILineInfo LineEntry =
79 getLineInfoForAddress(LineInfo->getVirtualAddress(), Specifier);
80 Table.push_back(std::make_pair(LineInfo->getVirtualAddress(), LineEntry));
86 PDBContext::getInliningInfoForAddress(uint64_t Address,
87 DILineInfoSpecifier Specifier) {
88 DIInliningInfo InlineInfo;
89 DILineInfo Frame = getLineInfoForAddress(Address, Specifier);
90 InlineInfo.addFrame(Frame);
94 std::string PDBContext::getFunctionName(uint64_t Address,
95 DINameKind NameKind) const {
96 if (NameKind == DINameKind::None)
99 if (NameKind == DINameKind::LinkageName) {
100 // It is not possible to get the mangled linkage name through a
101 // PDBSymbolFunc. For that we have to specifically request a
102 // PDBSymbolPublicSymbol.
104 Session->findSymbolByAddress(Address, PDB_SymType::PublicSymbol);
105 if (auto PS = dyn_cast_or_null<PDBSymbolPublicSymbol>(PublicSym.get()))
106 return PS->getName();
110 Session->findSymbolByAddress(Address, PDB_SymType::Function);
112 // This could happen either if there was no public symbol (e.g. not
113 // external) or the user requested the short name. In the former case,
114 // although they technically requested the linkage name, if the linkage
115 // name is not available we fallback to at least returning a non-empty
117 if (auto Func = dyn_cast_or_null<PDBSymbolFunc>(FuncSymbol.get()))
118 return Func->getName();
120 return std::string();