1 //===- DbiModuleDescriptorBuilder.cpp - PDB Mod Info Creation ---*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/DebugInfo/PDB/Native/DbiModuleDescriptorBuilder.h"
12 #include "llvm/ADT/ArrayRef.h"
13 #include "llvm/DebugInfo/CodeView/DebugSubsectionRecord.h"
14 #include "llvm/DebugInfo/MSF/MSFBuilder.h"
15 #include "llvm/DebugInfo/MSF/MSFCommon.h"
16 #include "llvm/DebugInfo/MSF/MappedBlockStream.h"
17 #include "llvm/DebugInfo/PDB/Native/DbiModuleDescriptor.h"
18 #include "llvm/DebugInfo/PDB/Native/RawConstants.h"
19 #include "llvm/DebugInfo/PDB/Native/RawError.h"
20 #include "llvm/Support/BinaryItemStream.h"
21 #include "llvm/Support/BinaryStreamWriter.h"
22 #include "llvm/Support/COFF.h"
25 using namespace llvm::codeview;
26 using namespace llvm::msf;
27 using namespace llvm::pdb;
30 template <> struct BinaryItemTraits<CVSymbol> {
31 static size_t length(const CVSymbol &Item) { return Item.RecordData.size(); }
33 static ArrayRef<uint8_t> bytes(const CVSymbol &Item) {
34 return Item.RecordData;
39 static uint32_t calculateDiSymbolStreamSize(uint32_t SymbolByteSize,
41 uint32_t Size = sizeof(uint32_t); // Signature
42 Size += SymbolByteSize; // Symbol Data
43 Size += 0; // TODO: Layout.C11Bytes
44 Size += C13Size; // C13 Debug Info Size
45 Size += sizeof(uint32_t); // GlobalRefs substream size (always 0)
46 Size += 0; // GlobalRefs substream bytes
50 DbiModuleDescriptorBuilder::DbiModuleDescriptorBuilder(StringRef ModuleName,
53 : MSF(Msf), ModuleName(ModuleName) {
54 Layout.Mod = ModIndex;
57 DbiModuleDescriptorBuilder::~DbiModuleDescriptorBuilder() {}
59 uint16_t DbiModuleDescriptorBuilder::getStreamIndex() const {
60 return Layout.ModDiStream;
63 void DbiModuleDescriptorBuilder::setObjFileName(StringRef Name) {
67 void DbiModuleDescriptorBuilder::addSymbol(CVSymbol Symbol) {
68 Symbols.push_back(Symbol);
69 SymbolByteSize += Symbol.data().size();
72 void DbiModuleDescriptorBuilder::addSourceFile(StringRef Path) {
73 SourceFiles.push_back(Path);
76 uint32_t DbiModuleDescriptorBuilder::calculateC13DebugInfoSize() const {
78 for (const auto &Builder : C13Builders) {
79 assert(Builder && "Empty C13 Fragment Builder!");
80 Result += Builder->calculateSerializedLength();
85 uint32_t DbiModuleDescriptorBuilder::calculateSerializedLength() const {
86 uint32_t L = sizeof(Layout);
87 uint32_t M = ModuleName.size() + 1;
88 uint32_t O = ObjFileName.size() + 1;
89 return alignTo(L + M + O, sizeof(uint32_t));
92 template <typename T> struct Foo {
93 explicit Foo(T &&Answer) : Answer(Answer) {}
98 template <typename T> Foo<T> makeFoo(T &&t) { return Foo<T>(std::move(t)); }
100 void DbiModuleDescriptorBuilder::finalize() {
101 Layout.FileNameOffs = 0; // TODO: Fix this
102 Layout.Flags = 0; // TODO: Fix this
104 Layout.C13Bytes = calculateC13DebugInfoSize();
105 (void)Layout.Mod; // Set in constructor
106 (void)Layout.ModDiStream; // Set in finalizeMsfLayout
107 Layout.NumFiles = SourceFiles.size();
108 Layout.PdbFilePathNI = 0;
109 Layout.SrcFileNameNI = 0;
111 // This value includes both the signature field as well as the record bytes
112 // from the symbol stream.
113 Layout.SymBytes = SymbolByteSize + sizeof(uint32_t);
116 Error DbiModuleDescriptorBuilder::finalizeMsfLayout() {
117 this->Layout.ModDiStream = kInvalidStreamIndex;
118 uint32_t C13Size = calculateC13DebugInfoSize();
120 MSF.addStream(calculateDiSymbolStreamSize(SymbolByteSize, C13Size));
122 return ExpectedSN.takeError();
123 Layout.ModDiStream = *ExpectedSN;
124 return Error::success();
127 Error DbiModuleDescriptorBuilder::commit(BinaryStreamWriter &ModiWriter,
128 const msf::MSFLayout &MsfLayout,
129 WritableBinaryStreamRef MsfBuffer) {
130 // We write the Modi record to the `ModiWriter`, but we additionally write its
131 // symbol stream to a brand new stream.
132 if (auto EC = ModiWriter.writeObject(Layout))
134 if (auto EC = ModiWriter.writeCString(ModuleName))
136 if (auto EC = ModiWriter.writeCString(ObjFileName))
138 if (auto EC = ModiWriter.padToAlignment(sizeof(uint32_t)))
141 if (Layout.ModDiStream != kInvalidStreamIndex) {
142 auto NS = WritableMappedBlockStream::createIndexedStream(
143 MsfLayout, MsfBuffer, Layout.ModDiStream);
144 WritableBinaryStreamRef Ref(*NS);
145 BinaryStreamWriter SymbolWriter(Ref);
146 // Write the symbols.
148 SymbolWriter.writeInteger<uint32_t>(COFF::DEBUG_SECTION_MAGIC))
150 BinaryItemStream<CVSymbol> Records(llvm::support::endianness::little);
151 Records.setItems(Symbols);
152 BinaryStreamRef RecordsRef(Records);
153 if (auto EC = SymbolWriter.writeStreamRef(RecordsRef))
155 // TODO: Write C11 Line data
157 for (const auto &Builder : C13Builders) {
158 assert(Builder && "Empty C13 Fragment Builder!");
159 if (auto EC = Builder->commit(SymbolWriter))
163 // TODO: Figure out what GlobalRefs substream actually is and populate it.
164 if (auto EC = SymbolWriter.writeInteger<uint32_t>(0))
166 if (SymbolWriter.bytesRemaining() > 0)
167 return make_error<RawError>(raw_error_code::stream_too_long);
169 return Error::success();
172 void DbiModuleDescriptorBuilder::addC13Fragment(
173 std::unique_ptr<DebugLinesSubsection> Lines) {
174 DebugLinesSubsection &Frag = *Lines;
176 // File Checksums have to come first, so push an empty entry on if this
178 if (C13Builders.empty())
179 C13Builders.push_back(nullptr);
181 this->LineInfo.push_back(std::move(Lines));
182 C13Builders.push_back(
183 llvm::make_unique<DebugSubsectionRecordBuilder>(Frag.kind(), Frag));
186 void DbiModuleDescriptorBuilder::addC13Fragment(
187 std::unique_ptr<codeview::DebugInlineeLinesSubsection> Inlinees) {
188 DebugInlineeLinesSubsection &Frag = *Inlinees;
190 // File Checksums have to come first, so push an empty entry on if this
192 if (C13Builders.empty())
193 C13Builders.push_back(nullptr);
195 this->Inlinees.push_back(std::move(Inlinees));
196 C13Builders.push_back(
197 llvm::make_unique<DebugSubsectionRecordBuilder>(Frag.kind(), Frag));
200 void DbiModuleDescriptorBuilder::setC13FileChecksums(
201 std::unique_ptr<DebugChecksumsSubsection> Checksums) {
202 assert(!ChecksumInfo && "Can't have more than one checksum info!");
204 if (C13Builders.empty())
205 C13Builders.push_back(nullptr);
207 ChecksumInfo = std::move(Checksums);
208 C13Builders[0] = llvm::make_unique<DebugSubsectionRecordBuilder>(
209 ChecksumInfo->kind(), *ChecksumInfo);