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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
119 lines
4.4 KiB
C++
119 lines
4.4 KiB
C++
//===-- PDBContext.cpp ------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===/
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#include "llvm/DebugInfo/PDB/PDBContext.h"
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#include "llvm/DebugInfo/PDB/IPDBEnumChildren.h"
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#include "llvm/DebugInfo/PDB/IPDBLineNumber.h"
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#include "llvm/DebugInfo/PDB/IPDBSourceFile.h"
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#include "llvm/DebugInfo/PDB/PDBSymbol.h"
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#include "llvm/DebugInfo/PDB/PDBSymbolData.h"
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#include "llvm/DebugInfo/PDB/PDBSymbolFunc.h"
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#include "llvm/DebugInfo/PDB/PDBSymbolPublicSymbol.h"
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#include "llvm/Object/COFF.h"
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using namespace llvm;
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using namespace llvm::object;
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using namespace llvm::pdb;
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PDBContext::PDBContext(const COFFObjectFile &Object,
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std::unique_ptr<IPDBSession> PDBSession)
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: DIContext(CK_PDB), Session(std::move(PDBSession)) {
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ErrorOr<uint64_t> ImageBase = Object.getImageBase();
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if (ImageBase)
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Session->setLoadAddress(ImageBase.get());
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}
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void PDBContext::dump(raw_ostream &OS, DIDumpOptions DumpOpts){}
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DILineInfo PDBContext::getLineInfoForAddress(uint64_t Address,
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DILineInfoSpecifier Specifier) {
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DILineInfo Result;
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Result.FunctionName = getFunctionName(Address, Specifier.FNKind);
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uint32_t Length = 1;
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std::unique_ptr<PDBSymbol> Symbol =
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Session->findSymbolByAddress(Address, PDB_SymType::None);
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if (auto Func = dyn_cast_or_null<PDBSymbolFunc>(Symbol.get())) {
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Length = Func->getLength();
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} else if (auto Data = dyn_cast_or_null<PDBSymbolData>(Symbol.get())) {
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Length = Data->getLength();
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}
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// If we couldn't find a symbol, then just assume 1 byte, so that we get
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// only the line number of the first instruction.
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auto LineNumbers = Session->findLineNumbersByAddress(Address, Length);
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if (!LineNumbers || LineNumbers->getChildCount() == 0)
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return Result;
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auto LineInfo = LineNumbers->getNext();
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assert(LineInfo);
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auto SourceFile = Session->getSourceFileById(LineInfo->getSourceFileId());
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if (SourceFile &&
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Specifier.FLIKind != DILineInfoSpecifier::FileLineInfoKind::None)
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Result.FileName = SourceFile->getFileName();
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Result.Column = LineInfo->getColumnNumber();
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Result.Line = LineInfo->getLineNumber();
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return Result;
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}
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DILineInfoTable
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PDBContext::getLineInfoForAddressRange(uint64_t Address, uint64_t Size,
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DILineInfoSpecifier Specifier) {
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if (Size == 0)
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return DILineInfoTable();
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DILineInfoTable Table;
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auto LineNumbers = Session->findLineNumbersByAddress(Address, Size);
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if (!LineNumbers || LineNumbers->getChildCount() == 0)
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return Table;
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while (auto LineInfo = LineNumbers->getNext()) {
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DILineInfo LineEntry =
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getLineInfoForAddress(LineInfo->getVirtualAddress(), Specifier);
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Table.push_back(std::make_pair(LineInfo->getVirtualAddress(), LineEntry));
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}
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return Table;
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}
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DIInliningInfo
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PDBContext::getInliningInfoForAddress(uint64_t Address,
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DILineInfoSpecifier Specifier) {
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DIInliningInfo InlineInfo;
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DILineInfo Frame = getLineInfoForAddress(Address, Specifier);
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InlineInfo.addFrame(Frame);
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return InlineInfo;
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}
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std::string PDBContext::getFunctionName(uint64_t Address,
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DINameKind NameKind) const {
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if (NameKind == DINameKind::None)
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return std::string();
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std::unique_ptr<PDBSymbol> FuncSymbol =
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Session->findSymbolByAddress(Address, PDB_SymType::Function);
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auto *Func = dyn_cast_or_null<PDBSymbolFunc>(FuncSymbol.get());
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if (NameKind == DINameKind::LinkageName) {
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// It is not possible to get the mangled linkage name through a
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// PDBSymbolFunc. For that we have to specifically request a
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// PDBSymbolPublicSymbol.
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auto PublicSym =
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Session->findSymbolByAddress(Address, PDB_SymType::PublicSymbol);
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if (auto *PS = dyn_cast_or_null<PDBSymbolPublicSymbol>(PublicSym.get())) {
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// If we also have a function symbol, prefer the use of public symbol name
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// only if it refers to the same address. The public symbol uses the
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// linkage name while the function does not.
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if (!Func || Func->getVirtualAddress() == PS->getVirtualAddress())
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return PS->getName();
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}
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}
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return Func ? Func->getName() : std::string();
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}
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