a96cce64a5
To facilitate this, a couple of changes had to be made: 1. `ModuleSubstream` got moved from `DebugInfo/PDB` to `DebugInfo/CodeView`, and various codeview related types are defined there. It turns out `DebugInfo/CodeView/Line.h` already defines many of these structures, but this is really old code that is not endian aware, doesn't interact well with `StreamInterface` and not very helpful for getting stuff out of a PDB. Eventually we should migrate the old readobj `COFFDumper` code to these new structures, or at least merge their functionality somehow. 2. A `ModuleSubstream` visitor is introduced. Depending on where your module substream array comes from, different subsets of record types can be expected. We are already hand parsing these substream arrays in many places especially in `COFFDumper.cpp`. In the future we can migrate these paths to the visitor as well, which should reduce a lot of code in `COFFDumper.cpp`. Differential Revision: http://reviews.llvm.org/D20936 Reviewed By: ruiu, majnemer llvm-svn: 271621
76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
//===- ModStream.cpp - PDB Module Info Stream Access ----------------------===//
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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/Raw/ModStream.h"
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#include "llvm/DebugInfo/CodeView/StreamReader.h"
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#include "llvm/DebugInfo/PDB/Raw/ModInfo.h"
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#include "llvm/DebugInfo/PDB/Raw/PDBFile.h"
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#include "llvm/DebugInfo/PDB/Raw/RawError.h"
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#include "llvm/DebugInfo/PDB/Raw/RawTypes.h"
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using namespace llvm;
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using namespace llvm::pdb;
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ModStream::ModStream(PDBFile &File, const ModInfo &Module)
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: Mod(Module), Stream(Module.getModuleStreamIndex(), File) {}
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ModStream::~ModStream() {}
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Error ModStream::reload() {
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codeview::StreamReader Reader(Stream);
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uint32_t SymbolSize = Mod.getSymbolDebugInfoByteSize();
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uint32_t C11Size = Mod.getLineInfoByteSize();
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uint32_t C13Size = Mod.getC13LineInfoByteSize();
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if (C11Size > 0 && C13Size > 0)
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return llvm::make_error<RawError>(raw_error_code::corrupt_file,
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"Module has both C11 and C13 line info");
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codeview::StreamRef S;
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uint32_t SymbolSubstreamSig = 0;
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if (auto EC = Reader.readInteger(SymbolSubstreamSig))
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return EC;
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if (auto EC = Reader.readArray(SymbolsSubstream, SymbolSize - 4))
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return EC;
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if (auto EC = Reader.readStreamRef(LinesSubstream, C11Size))
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return EC;
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if (auto EC = Reader.readStreamRef(C13LinesSubstream, C13Size))
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return EC;
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codeview::StreamReader LineReader(C13LinesSubstream);
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if (auto EC = LineReader.readArray(LineInfo, LineReader.bytesRemaining()))
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return EC;
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uint32_t GlobalRefsSize;
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if (auto EC = Reader.readInteger(GlobalRefsSize))
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return EC;
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if (auto EC = Reader.readStreamRef(GlobalRefsSubstream, GlobalRefsSize))
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return EC;
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if (Reader.bytesRemaining() > 0)
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return llvm::make_error<RawError>(raw_error_code::corrupt_file,
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"Unexpected bytes in module stream.");
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return Error::success();
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}
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iterator_range<codeview::CVSymbolArray::Iterator>
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ModStream::symbols(bool *HadError) const {
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return llvm::make_range(SymbolsSubstream.begin(HadError),
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SymbolsSubstream.end());
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}
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iterator_range<codeview::ModuleSubstreamArray::Iterator>
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ModStream::lines(bool *HadError) const {
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return llvm::make_range(LineInfo.begin(HadError), LineInfo.end());
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}
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