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ebd3ae8371
Object files have symbol records not aligned to any particular boundary (e.g. 1-byte aligned), while PDB files have symbol records padded to 4-byte aligned boundaries. Since they share the same reading / writing code, we have to provide an option to specify the alignment and propagate it up to the producer or consumer who knows what the alignment is supposed to be for the given container type. Added a test for this by modifying the existing PDB -> YAML -> PDB round-tripping code to round trip symbol records as well as types. Differential Revision: https://reviews.llvm.org/D33785 llvm-svn: 304484
55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
//===- SymbolSerializer.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/SymbolSerializer.h"
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using namespace llvm;
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using namespace llvm::codeview;
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SymbolSerializer::SymbolSerializer(BumpPtrAllocator &Allocator,
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CodeViewContainer Container)
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: Storage(Allocator), RecordBuffer(MaxRecordLength),
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Stream(RecordBuffer, llvm::support::little), Writer(Stream),
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Mapping(Writer, Container) {}
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Error SymbolSerializer::visitSymbolBegin(CVSymbol &Record) {
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assert(!CurrentSymbol.hasValue() && "Already in a symbol mapping!");
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Writer.setOffset(0);
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if (auto EC = writeRecordPrefix(Record.kind()))
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return EC;
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CurrentSymbol = Record.kind();
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if (auto EC = Mapping.visitSymbolBegin(Record))
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return EC;
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return Error::success();
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}
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Error SymbolSerializer::visitSymbolEnd(CVSymbol &Record) {
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assert(CurrentSymbol.hasValue() && "Not in a symbol mapping!");
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if (auto EC = Mapping.visitSymbolEnd(Record))
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return EC;
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uint32_t RecordEnd = Writer.getOffset();
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uint16_t Length = RecordEnd - 2;
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Writer.setOffset(0);
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if (auto EC = Writer.writeInteger(Length))
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return EC;
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uint8_t *StableStorage = Storage.Allocate<uint8_t>(RecordEnd);
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::memcpy(StableStorage, &RecordBuffer[0], RecordEnd);
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Record.RecordData = ArrayRef<uint8_t>(StableStorage, RecordEnd);
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CurrentSymbol.reset();
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return Error::success();
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}
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