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[pdb] Don't crash on unknown debug subsections.

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More and more unknown debug subsection kinds are being discovered
so we should make it possible to dump these and display the
bytes.

llvm-svn: 305041
This commit is contained in:
Zachary Turner 2017-06-09 00:53:59 +00:00
parent b3bb143c65
commit 6caecc8977
4 changed files with 15 additions and 14 deletions
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2
include/llvm/DebugInfo/CodeView/DebugSubsectionVisitor.h
View File

@ -120,7 +120,7 @@ Error visitDebugSubsections(T &&FragmentRange, DebugSubsectionVisitor &V,
DebugSubsectionState &State) {
State.initialize(std::forward<T>(FragmentRange));
for (const auto &L : FragmentRange) {
for (const DebugSubsectionRecord &L : FragmentRange) {
if (auto EC = visitDebugSubsection(L, V, State))
return EC;
}

13
lib/DebugInfo/CodeView/DebugSubsectionRecord.cpp
View File

@ -34,19 +34,6 @@ Error DebugSubsectionRecord::initialize(BinaryStreamRef Stream,
DebugSubsectionKind Kind =
static_cast<DebugSubsectionKind>(uint32_t(Header->Kind));
switch (Kind) {
case DebugSubsectionKind::FileChecksums:
case DebugSubsectionKind::Lines:
case DebugSubsectionKind::InlineeLines:
case DebugSubsectionKind::CrossScopeExports:
case DebugSubsectionKind::CrossScopeImports:
case DebugSubsectionKind::Symbols:
case DebugSubsectionKind::StringTable:
case DebugSubsectionKind::FrameData:
break;
default:
llvm_unreachable("Unexpected debug fragment kind!");
}
if (auto EC = Reader.readStreamRef(Info.Data, Header->Length))
return EC;
Info.Container = Container;

12
tools/llvm-pdbdump/LLVMOutputStyle.cpp
View File

@ -91,6 +91,18 @@ public:
LazyRandomTypeCollection &IPI)
: P(P), TPI(TPI), IPI(IPI) {}
Error visitUnknown(DebugUnknownSubsectionRef &Unknown) override {
if (!opts::checkModuleSubsection(opts::ModuleSubsection::Unknown))
return Error::success();
DictScope DD(P, "Unknown");
P.printHex("Kind", static_cast<uint32_t>(Unknown.kind()));
ArrayRef<uint8_t> Data;
BinaryStreamReader Reader(Unknown.getData());
consumeError(Reader.readBytes(Data, Reader.bytesRemaining()));
P.printBinaryBlock("Data", Data);
return Error::success();
}
Error visitLines(DebugLinesSubsectionRef &Lines,
const DebugSubsectionState &State) override {
if (!opts::checkModuleSubsection(opts::ModuleSubsection::Lines))

2
tools/llvm-pdbdump/llvm-pdbdump.cpp
View File

@ -442,6 +442,8 @@ cl::list<ModuleSubsection> DumpModuleSubsections(
clEnumValN(ModuleSubsection::Symbols, "symbols",
"Symbols (DEBUG_S_SYMBOLS subsection) (not typically "
"present in PDB file)"),
clEnumValN(ModuleSubsection::Unknown, "unknown",
"Any subsection not covered by another option"),
clEnumValN(ModuleSubsection::All, "all", "All known subsections")),
cl::cat(FileOptions), cl::sub(RawSubcommand), cl::sub(PdbToYamlSubcommand));
cl::opt<bool> DumpModuleSyms("module-syms", cl::desc("dump module symbols"),