Error CVSymbolDumperImpl::visitKnownRecord(CVSymbol &CVR,
DefRangeSym &DefRange) {
if (ObjDelegate) {
DebugStringTableSubsectionRef Strings = ObjDelegate->getStringTable();
auto ExpectedProgram = Strings.getString(DefRange.Program);
if (!ExpectedProgram) {
consumeError(ExpectedProgram.takeError());
return llvm::make_error<CodeViewError>(
"String table offset outside of bounds of String Table!");
}
W.printString("Program", *ExpectedProgram);
}
printLocalVariableAddrRange(DefRange.Range, DefRange.getRelocationOffset());
printLocalVariableAddrGap(DefRange.Gaps);
return Error::success();
}
Expected<std::shared_ptr<YAMLFrameDataSubsection>>
YAMLFrameDataSubsection::fromCodeViewSubsection(
const DebugStringTableSubsectionRef &Strings,
const DebugFrameDataSubsectionRef &Frames) {
auto Result = std::make_shared<YAMLFrameDataSubsection>();
for (const auto &F : Frames) {
YAMLFrameData YF;
YF.CodeSize = F.CodeSize;
YF.Flags = F.Flags;
YF.LocalSize = F.LocalSize;
YF.MaxStackSize = F.MaxStackSize;
YF.ParamsSize = F.ParamsSize;
YF.PrologSize = F.PrologSize;
YF.RvaStart = F.RvaStart;
YF.SavedRegsSize = F.SavedRegsSize;
auto ES = Strings.getString(F.FrameFunc);
if (!ES)
return joinErrors(
make_error<CodeViewError>(
cv_error_code::no_records,
"Could not find string for string id while mapping FrameData!"),
ES.takeError());
YF.FrameFunc = *ES;
Result->Frames.push_back(YF);
}
return Result;
}
static Expected<StringRef>
getFileName(const DebugStringTableSubsectionRef &Strings,
const DebugChecksumsSubsectionRef &Checksums, uint32_t FileID) {
auto Iter = Checksums.getArray().at(FileID);
if (Iter == Checksums.getArray().end())
return make_error<CodeViewError>(cv_error_code::no_records);
uint32_t Offset = Iter->FileNameOffset;
return Strings.getString(Offset);
}
static Expected<SourceFileChecksumEntry>
convertOneChecksum(const DebugStringTableSubsectionRef &Strings,
const FileChecksumEntry &CS) {
auto ExpectedString = Strings.getString(CS.FileNameOffset);
if (!ExpectedString)
return ExpectedString.takeError();
SourceFileChecksumEntry Result;
Result.ChecksumBytes.Bytes = CS.Checksum;
Result.Kind = CS.Kind;
Result.FileName = *ExpectedString;
return Result;
}
Expected<std::shared_ptr<YAMLCrossModuleImportsSubsection>>
YAMLCrossModuleImportsSubsection::fromCodeViewSubsection(
const DebugStringTableSubsectionRef &Strings,
const DebugCrossModuleImportsSubsectionRef &Imports) {
auto Result = std::make_shared<YAMLCrossModuleImportsSubsection>();
for (const auto &CMI : Imports) {
YAMLCrossModuleImport YCMI;
auto ExpectedStr = Strings.getString(CMI.Header->ModuleNameOffset);
if (!ExpectedStr)
return ExpectedStr.takeError();
YCMI.ModuleName = *ExpectedStr;
YCMI.ImportIds.assign(CMI.Imports.begin(), CMI.Imports.end());
Result->Imports.push_back(YCMI);
}
return Result;
}
Expected<std::shared_ptr<YAMLStringTableSubsection>>
YAMLStringTableSubsection::fromCodeViewSubsection(
const DebugStringTableSubsectionRef &Strings) {
auto Result = std::make_shared<YAMLStringTableSubsection>();
BinaryStreamReader Reader(Strings.getBuffer());
StringRef S;
// First item is a single null string, skip it.
if (auto EC = Reader.readCString(S))
return std::move(EC);
assert(S.empty());
while (Reader.bytesRemaining() > 0) {
if (auto EC = Reader.readCString(S))
return std::move(EC);
Result->Strings.push_back(S);
}
return Result;
}
// Add all object files to the PDB. Merge .debug$T sections into IpiData and
// TpiData.
static void addObjectsToPDB(BumpPtrAllocator &Alloc, SymbolTable *Symtab,
pdb::PDBFileBuilder &Builder,
TypeTableBuilder &TypeTable,
TypeTableBuilder &IDTable) {
// Follow type servers. If the same type server is encountered more than
// once for this instance of `PDBTypeServerHandler` (for example if many
// object files reference the same TypeServer), the types from the
// TypeServer will only be visited once.
pdb::PDBTypeServerHandler Handler;
// PDBs use a single global string table for filenames in the file checksum
// table.
auto PDBStrTab = std::make_shared<DebugStringTableSubsection>();
// Visit all .debug$T sections to add them to Builder.
for (ObjectFile *File : Symtab->ObjectFiles) {
// Add a module descriptor for every object file. We need to put an absolute
// path to the object into the PDB. If this is a plain object, we make its
// path absolute. If it's an object in an archive, we make the archive path
// absolute.
bool InArchive = !File->ParentName.empty();
SmallString<128> Path = InArchive ? File->ParentName : File->getName();
sys::fs::make_absolute(Path);
StringRef Name = InArchive ? File->getName() : StringRef(Path);
File->ModuleDBI = &ExitOnErr(Builder.getDbiBuilder().addModuleInfo(Name));
File->ModuleDBI->setObjFileName(Path);
// Before we can process symbol substreams from .debug$S, we need to process
// type information, file checksums, and the string table. Add type info to
// the PDB first, so that we can get the map from object file type and item
// indices to PDB type and item indices.
SmallVector<TypeIndex, 128> TypeIndexMap;
mergeDebugT(File, IDTable, TypeTable, TypeIndexMap, Handler);
// Now do all line info.
for (SectionChunk *DebugChunk : File->getDebugChunks()) {
if (!DebugChunk->isLive() || DebugChunk->getSectionName() != ".debug$S")
continue;
ArrayRef<uint8_t> RelocatedDebugContents =
relocateDebugChunk(Alloc, DebugChunk);
if (RelocatedDebugContents.empty())
continue;
DebugSubsectionArray Subsections;
BinaryStreamReader Reader(RelocatedDebugContents, support::little);
ExitOnErr(Reader.readArray(Subsections, RelocatedDebugContents.size()));
DebugStringTableSubsectionRef CVStrTab;
DebugChecksumsSubsectionRef Checksums;
for (const DebugSubsectionRecord &SS : Subsections) {
switch (SS.kind()) {
case DebugSubsectionKind::StringTable:
ExitOnErr(CVStrTab.initialize(SS.getRecordData()));
break;
case DebugSubsectionKind::FileChecksums:
ExitOnErr(Checksums.initialize(SS.getRecordData()));
break;
case DebugSubsectionKind::Lines:
// We can add the relocated line table directly to the PDB without
// modification because the file checksum offsets will stay the same.
File->ModuleDBI->addDebugSubsection(SS);
break;
case DebugSubsectionKind::Symbols:
mergeSymbolRecords(Alloc, File, TypeIndexMap, SS.getRecordData());
break;
default:
// FIXME: Process the rest of the subsections.
break;
}
}
if (Checksums.valid()) {
// Make a new file checksum table that refers to offsets in the PDB-wide
// string table. Generally the string table subsection appears after the
// checksum table, so we have to do this after looping over all the
// subsections.
if (!CVStrTab.valid())
fatal(".debug$S sections must have both a string table subsection "
"and a checksum subsection table or neither");
auto NewChecksums =
make_unique<DebugChecksumsSubsection>(*PDBStrTab);
for (FileChecksumEntry &FC : Checksums) {
StringRef FileName = ExitOnErr(CVStrTab.getString(FC.FileNameOffset));
ExitOnErr(Builder.getDbiBuilder().addModuleSourceFile(
*File->ModuleDBI, FileName));
NewChecksums->addChecksum(FileName, FC.Kind, FC.Checksum);
}
File->ModuleDBI->addDebugSubsection(std::move(NewChecksums));
}
}
}
Builder.getStringTableBuilder().setStrings(*PDBStrTab);
// Construct TPI stream contents.
addTypeInfo(Builder.getTpiBuilder(), TypeTable);
// Construct IPI stream contents.
addTypeInfo(Builder.getIpiBuilder(), IDTable);
}
Error llvm::codeview::visitDebugSubsection(
const DebugSubsectionRecord &R, DebugSubsectionVisitor &V,
const StringsAndChecksumsRef &State) {
BinaryStreamReader Reader(R.getRecordData());
switch (R.kind()) {
case DebugSubsectionKind::Lines: {
DebugLinesSubsectionRef Fragment;
if (auto EC = Fragment.initialize(Reader))
return EC;
return V.visitLines(Fragment, State);
}
case DebugSubsectionKind::FileChecksums: {
DebugChecksumsSubsectionRef Fragment;
if (auto EC = Fragment.initialize(Reader))
return EC;
return V.visitFileChecksums(Fragment, State);
}
case DebugSubsectionKind::InlineeLines: {
DebugInlineeLinesSubsectionRef Fragment;
if (auto EC = Fragment.initialize(Reader))
return EC;
return V.visitInlineeLines(Fragment, State);
}
case DebugSubsectionKind::CrossScopeExports: {
DebugCrossModuleExportsSubsectionRef Section;
if (auto EC = Section.initialize(Reader))
return EC;
return V.visitCrossModuleExports(Section, State);
}
case DebugSubsectionKind::CrossScopeImports: {
DebugCrossModuleImportsSubsectionRef Section;
if (auto EC = Section.initialize(Reader))
return EC;
return V.visitCrossModuleImports(Section, State);
}
case DebugSubsectionKind::Symbols: {
DebugSymbolsSubsectionRef Section;
if (auto EC = Section.initialize(Reader))
return EC;
return V.visitSymbols(Section, State);
}
case DebugSubsectionKind::StringTable: {
DebugStringTableSubsectionRef Section;
if (auto EC = Section.initialize(Reader))
return EC;
return V.visitStringTable(Section, State);
}
case DebugSubsectionKind::FrameData: {
DebugFrameDataSubsectionRef Section;
if (auto EC = Section.initialize(Reader))
return EC;
return V.visitFrameData(Section, State);
}
case DebugSubsectionKind::CoffSymbolRVA: {
DebugSymbolRVASubsectionRef Section;
if (auto EC = Section.initialize(Reader))
return EC;
return V.visitCOFFSymbolRVAs(Section, State);
}
default: {
DebugUnknownSubsectionRef Fragment(R.kind(), R.getRecordData());
return V.visitUnknown(Fragment);
}
}
}
