1 //===- 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"
11
12 #include "llvm/DebugInfo/CodeView/StreamReader.h"
13 #include "llvm/DebugInfo/PDB/Raw/IndexedStreamData.h"
14 #include "llvm/DebugInfo/PDB/Raw/ModInfo.h"
15 #include "llvm/DebugInfo/PDB/Raw/PDBFile.h"
16 #include "llvm/DebugInfo/PDB/Raw/RawError.h"
17 #include "llvm/DebugInfo/PDB/Raw/RawTypes.h"
18
19 using namespace llvm;
20 using namespace llvm::pdb;
21
ModStream(const ModInfo & Module,std::unique_ptr<MappedBlockStream> Stream)22 ModStream::ModStream(const ModInfo &Module,
23 std::unique_ptr<MappedBlockStream> Stream)
24 : Mod(Module), Stream(std::move(Stream)) {}
25
~ModStream()26 ModStream::~ModStream() {}
27
reload()28 Error ModStream::reload() {
29 codeview::StreamReader Reader(*Stream);
30
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
39 codeview::StreamRef S;
40
41 uint32_t SymbolSubstreamSig = 0;
42 if (auto EC = Reader.readInteger(SymbolSubstreamSig))
43 return EC;
44 if (auto EC = Reader.readArray(SymbolsSubstream, SymbolSize - 4))
45 return EC;
46
47 if (auto EC = Reader.readStreamRef(LinesSubstream, C11Size))
48 return EC;
49 if (auto EC = Reader.readStreamRef(C13LinesSubstream, C13Size))
50 return EC;
51
52 codeview::StreamReader LineReader(C13LinesSubstream);
53 if (auto EC = LineReader.readArray(LineInfo, LineReader.bytesRemaining()))
54 return EC;
55
56 uint32_t GlobalRefsSize;
57 if (auto EC = Reader.readInteger(GlobalRefsSize))
58 return EC;
59 if (auto EC = Reader.readStreamRef(GlobalRefsSubstream, GlobalRefsSize))
60 return EC;
61 if (Reader.bytesRemaining() > 0)
62 return llvm::make_error<RawError>(raw_error_code::corrupt_file,
63 "Unexpected bytes in module stream.");
64
65 return Error::success();
66 }
67
68 iterator_range<codeview::CVSymbolArray::Iterator>
symbols(bool * HadError) const69 ModStream::symbols(bool *HadError) const {
70 // It's OK if the stream is empty.
71 if (SymbolsSubstream.getUnderlyingStream().getLength() == 0)
72 return llvm::make_range(SymbolsSubstream.end(), SymbolsSubstream.end());
73 return llvm::make_range(SymbolsSubstream.begin(HadError),
74 SymbolsSubstream.end());
75 }
76
77 iterator_range<codeview::ModuleSubstreamArray::Iterator>
lines(bool * HadError) const78 ModStream::lines(bool *HadError) const {
79 return llvm::make_range(LineInfo.begin(HadError), LineInfo.end());
80 }
81
commit()82 Error ModStream::commit() { return Error::success(); }
83