Optional<ASTBuilder::ForeignModuleKind>
ASTBuilder::getForeignModuleKind(NodePointer node) {
if (node->getKind() == Demangle::Node::Kind::DeclContext)
return getForeignModuleKind(node->getFirstChild());
if (node->getKind() != Demangle::Node::Kind::Module)
return None;
return llvm::StringSwitch<Optional<ForeignModuleKind>>(node->getText())
.Case(MANGLING_MODULE_OBJC, ForeignModuleKind::Imported)
.Case(MANGLING_MODULE_CLANG_IMPORTER,
ForeignModuleKind::SynthesizedByImporter)
.Default(None);
}
bool Context::isThunkSymbol(llvm::StringRef MangledName) {
if (isMangledName(MangledName)) {
// First do a quick check
if (MangledName.endswith("TA") || // partial application forwarder
MangledName.endswith("Ta") || // ObjC partial application forwarder
MangledName.endswith("To") || // swift-as-ObjC thunk
MangledName.endswith("TO") || // ObjC-as-swift thunk
MangledName.endswith("TR") || // reabstraction thunk helper function
MangledName.endswith("Tr") || // reabstraction thunk
MangledName.endswith("TW") || // protocol witness thunk
MangledName.endswith("fC")) { // allocating constructor
// To avoid false positives, we need to fully demangle the symbol.
NodePointer Nd = D->demangleSymbol(MangledName);
if (!Nd || Nd->getKind() != Node::Kind::Global ||
Nd->getNumChildren() == 0)
return false;
switch (Nd->getFirstChild()->getKind()) {
case Node::Kind::ObjCAttribute:
case Node::Kind::NonObjCAttribute:
case Node::Kind::PartialApplyObjCForwarder:
case Node::Kind::PartialApplyForwarder:
case Node::Kind::ReabstractionThunkHelper:
case Node::Kind::ReabstractionThunk:
case Node::Kind::ProtocolWitness:
case Node::Kind::Allocator:
return true;
default:
break;
}
}
return false;
}
if (MangledName.startswith("_T")) {
// Old mangling.
StringRef Remaining = MangledName.substr(2);
if (Remaining.startswith("To") || // swift-as-ObjC thunk
Remaining.startswith("TO") || // ObjC-as-swift thunk
Remaining.startswith("PA_") || // partial application forwarder
Remaining.startswith("PAo_")) { // ObjC partial application forwarder
return true;
}
}
return false;
}