================
@@ -9619,6 +9620,65 @@ ObjCInterfaceDecl *ASTContext::getObjCProtocolDecl()
const {
return ObjCProtocolClassDecl;
}
+std::optional<PointerAuthQualifier>
+ASTContext::getExplicitOrImplicitPointerAuth(QualType T) {
+ auto ExplicitQualifier = T.getPointerAuth();
+ if (ExplicitQualifier.isPresent())
+ return ExplicitQualifier;
+ if (T->isDependentType()) {
+ return std::nullopt;
+ }
+ // FIXME: The more we expand pointer auth support, the more it becomes clear
+ // the codegen option's PointerAuth info belongs in LangOpts
+ if (!LangOpts.PointerAuthCalls)
+ return PointerAuthQualifier();
+ if (T->isFunctionPointerType() || T->isFunctionReferenceType())
+ T = T->getPointeeType();
+ if (!T->isFunctionType())
+ return PointerAuthQualifier();
+ int ExtraDiscriminator = 0;
+ if (LangOpts.PointerAuthFunctionTypeDiscrimination) {
+ ExtraDiscriminator = getPointerAuthTypeDiscriminator(T);
+ }
+ return PointerAuthQualifier::Create(
+ LangOpts.PointerAuthFunctionKey, false, ExtraDiscriminator,
+ PointerAuthenticationMode::SignAndAuth,
+ /*isIsaPointer=*/false, /*authenticatesNullValues=*/false);
+}
+
+std::string
+ASTContext::getPointerAuthOptionsString(const PointerAuthQualifier &PAQ) {
+ llvm::SmallVector<llvm::StringLiteral, 4> Options;
+ switch (PAQ.getAuthenticationMode()) {
+ case PointerAuthenticationMode::Strip:
+ Options.push_back(PointerAuthenticationOptionStrip);
+ break;
+ case PointerAuthenticationMode::SignAndStrip:
+ Options.push_back(PointerAuthenticationOptionSignAndStrip);
+ break;
+ case PointerAuthenticationMode::SignAndAuth:
+ // Just default to not listing this explicitly
+ break;
+ default:
+ llvm_unreachable("Invalid authentication mode");
+ }
+ if (PAQ.isIsaPointer())
+ Options.push_back(PointerAuthenticationOptionIsaPointer);
+ if (PAQ.authenticatesNullValues())
+ Options.push_back(PointerAuthenticationOptionAuthenticatesNullValues);
+ if (Options.empty())
+ return std::string();
+ if (Options.size() == 1)
+ return Options[0].str();
+ std::ostringstream Buffer;
----------------
ojhunt wrote:
oh sigh, that's why those strings are defined, because we need them here.
I need to work out how to approach this patch and the options patch, as there's
a bit, but not much, overlap.
But this again goes back to the "where should the string constants like
`PointerAuthenticationOptionSignAndStrip` be placed?"
https://github.com/llvm/llvm-project/pull/138482
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