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Type records have a unique type index, but symbol records do not. Instead, symbol records refer to other symbol records by referencing their offset in the symbol stream. In a sense this is the analogue of the TypeIndex, but we are not printing it in the dumper. Printing it not only gives us more useful information when manually investigating the contents of a PDB, but also allows us to write better tests by enabling us to verify that fields that reference other symbol records do so correctly. Differential Revision: https://reviews.llvm.org/D34906 llvm-svn: 306890
85 lines
2.8 KiB
C++
85 lines
2.8 KiB
C++
//===- CVSymbolVisitor.cpp --------------------------------------*- 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/CodeView/CVSymbolVisitor.h"
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#include "llvm/DebugInfo/CodeView/CodeViewError.h"
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#include "llvm/DebugInfo/CodeView/SymbolVisitorCallbacks.h"
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#include "llvm/Support/BinaryByteStream.h"
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using namespace llvm;
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using namespace llvm::codeview;
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CVSymbolVisitor::CVSymbolVisitor(SymbolVisitorCallbacks &Callbacks)
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: Callbacks(Callbacks) {}
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template <typename T>
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static Error visitKnownRecord(CVSymbol &Record,
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SymbolVisitorCallbacks &Callbacks) {
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SymbolRecordKind RK = static_cast<SymbolRecordKind>(Record.Type);
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T KnownRecord(RK);
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if (auto EC = Callbacks.visitKnownRecord(Record, KnownRecord))
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return EC;
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return Error::success();
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}
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static Error finishVisitation(CVSymbol &Record,
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SymbolVisitorCallbacks &Callbacks) {
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switch (Record.Type) {
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default:
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if (auto EC = Callbacks.visitUnknownSymbol(Record))
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return EC;
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break;
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#define SYMBOL_RECORD(EnumName, EnumVal, Name) \
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case EnumName: { \
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if (auto EC = visitKnownRecord<Name>(Record, Callbacks)) \
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return EC; \
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break; \
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}
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#define SYMBOL_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName) \
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SYMBOL_RECORD(EnumVal, EnumVal, AliasName)
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#include "llvm/DebugInfo/CodeView/CodeViewSymbols.def"
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}
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if (auto EC = Callbacks.visitSymbolEnd(Record))
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return EC;
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return Error::success();
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}
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Error CVSymbolVisitor::visitSymbolRecord(CVSymbol &Record) {
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if (auto EC = Callbacks.visitSymbolBegin(Record))
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return EC;
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return finishVisitation(Record, Callbacks);
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}
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Error CVSymbolVisitor::visitSymbolRecord(CVSymbol &Record, uint32_t Offset) {
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if (auto EC = Callbacks.visitSymbolBegin(Record, Offset))
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return EC;
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return finishVisitation(Record, Callbacks);
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}
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Error CVSymbolVisitor::visitSymbolStream(const CVSymbolArray &Symbols) {
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for (auto I : Symbols) {
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if (auto EC = visitSymbolRecord(I))
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return EC;
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}
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return Error::success();
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}
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Error CVSymbolVisitor::visitSymbolStream(const CVSymbolArray &Symbols,
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uint32_t InitialOffset) {
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for (auto I : Symbols) {
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if (auto EC = visitSymbolRecord(I, InitialOffset))
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return EC;
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InitialOffset += I.length();
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}
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return Error::success();
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}
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