7999b4fa48
The way DIA SDK works is that when you request a symbol, it gets assigned an internal identifier that is unique for the life of the session. You can then use this identifier to get back the same symbol, with all of the same internal state that it had before, even if you "destroyed" the original copy of the object you had. This didn't work properly in our native implementation, and if you destroyed an object for a particular symbol, then requested the same symbol again, it would get assigned a new ID and you'd get a fresh copy of the object. In order to fix this some refactoring had to happen to properly reuse cached objects. Some unittests are added to verify that symbol reuse is taking place, making use of the new unittest input feature. llvm-svn: 341503
70 lines
2.3 KiB
C++
70 lines
2.3 KiB
C++
//===- PDBSymbolData.cpp - PDB data (e.g. variable) accessors ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/DebugInfo/PDB/PDBSymbolData.h"
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#include "llvm/DebugInfo/PDB/IPDBSectionContrib.h"
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#include "llvm/DebugInfo/PDB/IPDBSession.h"
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#include "llvm/DebugInfo/PDB/PDBSymDumper.h"
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#include <utility>
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using namespace llvm;
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using namespace llvm::pdb;
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void PDBSymbolData::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
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std::unique_ptr<IPDBEnumLineNumbers> PDBSymbolData::getLineNumbers() const {
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auto Len = RawSymbol->getLength();
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Len = Len ? Len : 1;
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if (auto RVA = RawSymbol->getRelativeVirtualAddress())
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return Session.findLineNumbersByRVA(RVA, Len);
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if (auto Section = RawSymbol->getAddressSection())
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return Session.findLineNumbersBySectOffset(
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Section, RawSymbol->getAddressOffset(), Len);
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return nullptr;
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}
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uint32_t PDBSymbolData::getCompilandId() const {
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if (auto Lines = getLineNumbers()) {
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if (auto FirstLine = Lines->getNext())
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return FirstLine->getCompilandId();
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}
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uint32_t DataSection = RawSymbol->getAddressSection();
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uint32_t DataOffset = RawSymbol->getAddressOffset();
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if (DataSection == 0) {
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if (auto RVA = RawSymbol->getRelativeVirtualAddress())
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Session.addressForRVA(RVA, DataSection, DataOffset);
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}
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if (DataSection) {
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if (auto SecContribs = Session.getSectionContribs()) {
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while (auto Section = SecContribs->getNext()) {
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if (Section->getAddressSection() == DataSection &&
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Section->getAddressOffset() <= DataOffset &&
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(Section->getAddressOffset() + Section->getLength()) > DataOffset)
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return Section->getCompilandId();
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}
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}
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} else {
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auto LexParentId = RawSymbol->getLexicalParentId();
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while (auto LexParent = Session.getSymbolById(LexParentId)) {
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if (LexParent->getSymTag() == PDB_SymType::Exe)
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break;
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if (LexParent->getSymTag() == PDB_SymType::Compiland)
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return LexParentId;
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LexParentId = LexParent->getRawSymbol().getLexicalParentId();
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}
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}
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return 0;
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}
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