]> CyberLeo.Net >> Repos - FreeBSD/FreeBSD.git/blob - contrib/llvm/lib/DebugInfo/PDB/Native/ModStream.cpp
Merge llvm, clang, lld, lldb, compiler-rt and libc++ r301441, and update
[FreeBSD/FreeBSD.git] / contrib / llvm / lib / DebugInfo / PDB / Native / ModStream.cpp
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/Native/ModStream.h"
11 #include "llvm/ADT/iterator_range.h"
12 #include "llvm/DebugInfo/CodeView/SymbolRecord.h"
13 #include "llvm/DebugInfo/PDB/Native/ModInfo.h"
14 #include "llvm/DebugInfo/PDB/Native/PDBFile.h"
15 #include "llvm/DebugInfo/PDB/Native/RawError.h"
16 #include "llvm/DebugInfo/PDB/Native/RawTypes.h"
17 #include "llvm/Support/BinaryStreamReader.h"
18 #include "llvm/Support/BinaryStreamRef.h"
19 #include "llvm/Support/Error.h"
20 #include <algorithm>
21 #include <cstdint>
22
23 using namespace llvm;
24 using namespace llvm::msf;
25 using namespace llvm::pdb;
26
27 ModStream::ModStream(const ModInfo &Module,
28                      std::unique_ptr<MappedBlockStream> Stream)
29     : Mod(Module), Stream(std::move(Stream)) {}
30
31 ModStream::~ModStream() = default;
32
33 Error ModStream::reload() {
34   BinaryStreamReader Reader(*Stream);
35
36   uint32_t SymbolSize = Mod.getSymbolDebugInfoByteSize();
37   uint32_t C11Size = Mod.getLineInfoByteSize();
38   uint32_t C13Size = Mod.getC13LineInfoByteSize();
39
40   if (C11Size > 0 && C13Size > 0)
41     return make_error<RawError>(raw_error_code::corrupt_file,
42                                 "Module has both C11 and C13 line info");
43
44   BinaryStreamRef S;
45
46   if (auto EC = Reader.readInteger(Signature))
47     return EC;
48   if (auto EC = Reader.readArray(SymbolsSubstream, SymbolSize - 4))
49     return EC;
50
51   if (auto EC = Reader.readStreamRef(LinesSubstream, C11Size))
52     return EC;
53   if (auto EC = Reader.readStreamRef(C13LinesSubstream, C13Size))
54     return EC;
55
56   BinaryStreamReader LineReader(C13LinesSubstream);
57   if (auto EC = LineReader.readArray(LineInfo, LineReader.bytesRemaining()))
58     return EC;
59
60   uint32_t GlobalRefsSize;
61   if (auto EC = Reader.readInteger(GlobalRefsSize))
62     return EC;
63   if (auto EC = Reader.readStreamRef(GlobalRefsSubstream, GlobalRefsSize))
64     return EC;
65   if (Reader.bytesRemaining() > 0)
66     return make_error<RawError>(raw_error_code::corrupt_file,
67                                 "Unexpected bytes in module stream.");
68
69   return Error::success();
70 }
71
72 iterator_range<codeview::CVSymbolArray::Iterator>
73 ModStream::symbols(bool *HadError) const {
74   // It's OK if the stream is empty.
75   if (SymbolsSubstream.getUnderlyingStream().getLength() == 0)
76     return make_range(SymbolsSubstream.end(), SymbolsSubstream.end());
77   return make_range(SymbolsSubstream.begin(HadError), SymbolsSubstream.end());
78 }
79
80 iterator_range<codeview::ModuleSubstreamArray::Iterator>
81 ModStream::lines(bool *HadError) const {
82   return make_range(LineInfo.begin(HadError), LineInfo.end());
83 }
84
85 bool ModStream::hasLineInfo() const {
86   return C13LinesSubstream.getLength() > 0 || LinesSubstream.getLength() > 0;
87 }
88
89 Error ModStream::commit() { return Error::success(); }