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Merge pull request #79171 from augusto2112/debug-info-witness-table

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[DebugInfo] Emit debug info for witness tables
This commit is contained in:
Augusto Noronha
2025-05-21 09:23:04 +09:00
committed by GitHub
parent 98c3993503 66748f71eb
commit c8eba86c3e
16 changed files with 251 additions and 104 deletions
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73
lib/IRGen/IRGenDebugInfo.cpp
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@@ -279,8 +279,16 @@ public:
DebugTypeInfo DebugType,
bool IsLocalToUnit,
std::optional<SILLocation> Loc);
void emitArtificialVariable(IRGenFunction &IGF, llvm::Value *Metadata,
StringRef Name, StringRef Identifier);
void emitTypeMetadata(IRGenFunction &IGF, llvm::Value *Metadata,
unsigned Depth, unsigned Index, StringRef Name);
GenericTypeParamType *Type);
void emitWitnessTable(IRGenFunction &IGF, llvm::Value *Metadata,
StringRef Name, ProtocolDecl *protocol);
void emitPackCountParameter(IRGenFunction &IGF, llvm::Value *Metadata,
SILDebugVariable VarInfo);
@@ -3904,9 +3912,10 @@ void IRGenDebugInfoImpl::emitGlobalVariableDeclaration(
Var->addDebugInfo(GV);
}
void IRGenDebugInfoImpl::emitTypeMetadata(IRGenFunction &IGF,
llvm::Value *Metadata, unsigned Depth,
unsigned Index, StringRef Name) {
void IRGenDebugInfoImpl::emitArtificialVariable(IRGenFunction &IGF,
llvm::Value *Metadata,
StringRef Name,
StringRef Identifier) {
if (Opts.DebugInfoLevel <= IRGenDebugInfoLevel::LineTables)
return;
@@ -3915,23 +3924,44 @@ void IRGenDebugInfoImpl::emitTypeMetadata(IRGenFunction &IGF,
if (!DS || DS->getInlinedFunction()->isTransparent())
return;
llvm::SmallString<8> Buf;
static const char *Tau = SWIFT_UTF8("\u03C4");
llvm::raw_svector_ostream OS(Buf);
OS << '$' << Tau << '_' << Depth << '_' << Index;
uint64_t PtrWidthInBits = CI.getTargetInfo().getPointerWidth(clang::LangAS::Default);
uint64_t PtrWidthInBits =
CI.getTargetInfo().getPointerWidth(clang::LangAS::Default);
assert(PtrWidthInBits % 8 == 0);
auto DbgTy = DebugTypeInfo::getTypeMetadata(
getMetadataType(Name)->getDeclaredInterfaceType().getPointer(),
Size(PtrWidthInBits / 8),
Alignment(CI.getTargetInfo().getPointerAlign(clang::LangAS::Default)));
emitVariableDeclaration(IGF.Builder, Metadata, DbgTy, IGF.getDebugScope(),
{}, {OS.str().str(), 0, false},
// swift.type is already a pointer type,
// having a shadow copy doesn't add another
// layer of indirection.
IGF.isAsync() ? CoroDirectValue : DirectValue,
ArtificialValue);
emitVariableDeclaration(
IGF.Builder, Metadata, DbgTy, IGF.getDebugScope(), {},
{Identifier, 0, false}, // swift.type is already a pointer type,
// having a shadow copy doesn't add another
// layer of indirection.
IGF.isAsync() ? CoroDirectValue : DirectValue, ArtificialValue);
}
void IRGenDebugInfoImpl::emitTypeMetadata(IRGenFunction &IGF,
llvm::Value *Metadata,
GenericTypeParamType *Type) {
llvm::SmallString<8> Buf;
llvm::raw_svector_ostream OS(Buf);
OS << "$" << Type->getCanonicalName().str();
auto Name = Type->getName().str();
emitArtificialVariable(IGF, Metadata, Name, OS.str());
}
void IRGenDebugInfoImpl::emitWitnessTable(IRGenFunction &IGF,
llvm::Value *Metadata, StringRef Name,
ProtocolDecl *protocol) {
llvm::SmallString<32> Buf;
llvm::raw_svector_ostream OS(Buf);
DebugTypeInfo DbgTy(protocol->getDeclaredType());
auto MangledName = getMangledName(DbgTy).Canonical;
OS << "$WT" << Name << "$$" << MangledName;;
// Make sure this ID lives long enough.
auto Id = IGF.getSwiftModule()->getASTContext().getIdentifier(OS.str());
emitArtificialVariable(IGF, Metadata, Name, Id.str());
}
void IRGenDebugInfoImpl::emitPackCountParameter(IRGenFunction &IGF,
@@ -4070,10 +4100,15 @@ void IRGenDebugInfo::emitGlobalVariableDeclaration(
}
void IRGenDebugInfo::emitTypeMetadata(IRGenFunction &IGF, llvm::Value *Metadata,
unsigned Depth, unsigned Index,
StringRef Name) {
GenericTypeParamType *Type) {
static_cast<IRGenDebugInfoImpl *>(this)->emitTypeMetadata(IGF, Metadata,
Depth, Index, Name);
Type);
}
void IRGenDebugInfo::emitWitnessTable(IRGenFunction &IGF, llvm::Value *Metadata,
StringRef Name, ProtocolDecl *protocol) {
static_cast<IRGenDebugInfoImpl *>(this)->emitWitnessTable(IGF, Metadata, Name,
protocol);
}
void IRGenDebugInfo::emitPackCountParameter(IRGenFunction &IGF,