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Zachary Turner06c2b4b2016-05-09 17:45:21 +00001//===- ModStream.cpp - PDB Module Info Stream Access ----------------------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "llvm/DebugInfo/PDB/Raw/ModStream.h"
Zachary Turnerd5d37dc2016-05-25 20:37:03 +000011
Zachary Turnera3225b02016-07-29 20:56:36 +000012#include "llvm/DebugInfo/MSF/StreamReader.h"
Zachary Turner06c2b4b2016-05-09 17:45:21 +000013#include "llvm/DebugInfo/PDB/Raw/ModInfo.h"
Zachary Turner90b8b8d2016-05-31 22:41:52 +000014#include "llvm/DebugInfo/PDB/Raw/PDBFile.h"
Zachary Turner06c2b4b2016-05-09 17:45:21 +000015#include "llvm/DebugInfo/PDB/Raw/RawError.h"
Zachary Turner7eb6d352016-06-02 20:11:22 +000016#include "llvm/DebugInfo/PDB/Raw/RawTypes.h"
Zachary Turner06c2b4b2016-05-09 17:45:21 +000017
18using namespace llvm;
Zachary Turnerbac69d32016-07-22 19:56:05 +000019using namespace llvm::msf;
Zachary Turner06c2b4b2016-05-09 17:45:21 +000020using namespace llvm::pdb;
21
Zachary Turnera1657a92016-06-08 17:26:39 +000022ModStream::ModStream(const ModInfo &Module,
23 std::unique_ptr<MappedBlockStream> Stream)
24 : Mod(Module), Stream(std::move(Stream)) {}
Zachary Turner06c2b4b2016-05-09 17:45:21 +000025
26ModStream::~ModStream() {}
27
28Error ModStream::reload() {
Zachary Turnerbac69d32016-07-22 19:56:05 +000029 StreamReader Reader(*Stream);
Zachary Turner06c2b4b2016-05-09 17:45:21 +000030
31 uint32_t SymbolSize = Mod.getSymbolDebugInfoByteSize();
32 uint32_t C11Size = Mod.getLineInfoByteSize();
33 uint32_t C13Size = Mod.getC13LineInfoByteSize();
34
35 if (C11Size > 0 && C13Size > 0)
36 return llvm::make_error<RawError>(raw_error_code::corrupt_file,
37 "Module has both C11 and C13 line info");
38
Zachary Turnerd66889c2016-07-28 19:12:28 +000039 ReadableStreamRef S;
Zachary Turner1de49c92016-05-27 18:47:20 +000040
Zachary Turner3b147642016-10-08 01:12:01 +000041 if (auto EC = Reader.readInteger(Signature))
Zachary Turner06c2b4b2016-05-09 17:45:21 +000042 return EC;
Zachary Turner1de49c92016-05-27 18:47:20 +000043 if (auto EC = Reader.readArray(SymbolsSubstream, SymbolSize - 4))
44 return EC;
45
Zachary Turner8dbe3622016-05-27 01:54:44 +000046 if (auto EC = Reader.readStreamRef(LinesSubstream, C11Size))
Zachary Turner06c2b4b2016-05-09 17:45:21 +000047 return EC;
Zachary Turner8dbe3622016-05-27 01:54:44 +000048 if (auto EC = Reader.readStreamRef(C13LinesSubstream, C13Size))
Zachary Turner06c2b4b2016-05-09 17:45:21 +000049 return EC;
Zachary Turner7eb6d352016-06-02 20:11:22 +000050
Zachary Turnerbac69d32016-07-22 19:56:05 +000051 StreamReader LineReader(C13LinesSubstream);
Zachary Turner7eb6d352016-06-02 20:11:22 +000052 if (auto EC = LineReader.readArray(LineInfo, LineReader.bytesRemaining()))
Zachary Turner93839cb2016-06-02 05:07:49 +000053 return EC;
Zachary Turner06c2b4b2016-05-09 17:45:21 +000054
55 uint32_t GlobalRefsSize;
56 if (auto EC = Reader.readInteger(GlobalRefsSize))
57 return EC;
Zachary Turner8dbe3622016-05-27 01:54:44 +000058 if (auto EC = Reader.readStreamRef(GlobalRefsSubstream, GlobalRefsSize))
Zachary Turner06c2b4b2016-05-09 17:45:21 +000059 return EC;
60 if (Reader.bytesRemaining() > 0)
61 return llvm::make_error<RawError>(raw_error_code::corrupt_file,
62 "Unexpected bytes in module stream.");
63
64 return Error::success();
65}
66
Zachary Turner0d43c1c2016-05-28 05:21:57 +000067iterator_range<codeview::CVSymbolArray::Iterator>
68ModStream::symbols(bool *HadError) const {
Reid Kleckner64b16172016-07-01 00:37:49 +000069 // It's OK if the stream is empty.
70 if (SymbolsSubstream.getUnderlyingStream().getLength() == 0)
71 return llvm::make_range(SymbolsSubstream.end(), SymbolsSubstream.end());
David Majnemera7c29322016-06-01 18:13:04 +000072 return llvm::make_range(SymbolsSubstream.begin(HadError),
73 SymbolsSubstream.end());
Zachary Turner06c2b4b2016-05-09 17:45:21 +000074}
Zachary Turner7eb6d352016-06-02 20:11:22 +000075
Zachary Turnera96cce62016-06-03 03:25:59 +000076iterator_range<codeview::ModuleSubstreamArray::Iterator>
Zachary Turner7eb6d352016-06-02 20:11:22 +000077ModStream::lines(bool *HadError) const {
78 return llvm::make_range(LineInfo.begin(HadError), LineInfo.end());
79}
Zachary Turner8848a7a2016-07-06 18:05:57 +000080
81Error ModStream::commit() { return Error::success(); }