more printf attribute on block declaration and
checking when block is envoked. In progress.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@72039 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaChecking.cpp b/lib/Sema/SemaChecking.cpp
index 22dcc49..a76463f 100644
--- a/lib/Sema/SemaChecking.cpp
+++ b/lib/Sema/SemaChecking.cpp
@@ -181,6 +181,34 @@
return move(TheCallResult);
}
+Action::OwningExprResult
+Sema::CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall) {
+
+ OwningExprResult TheCallResult(Owned(TheCall));
+ // Printf checking.
+ const FormatAttr *Format = NDecl->getAttr<FormatAttr>();
+ if (!Format)
+ return move(TheCallResult);
+ const VarDecl *V = dyn_cast<VarDecl>(NDecl);
+ if (!V)
+ return move(TheCallResult);
+ QualType Ty = V->getType();
+ if (!Ty->isBlockPointerType())
+ return move(TheCallResult);
+ if (Format->getType() == "printf") {
+ bool HasVAListArg = Format->getFirstArg() == 0;
+ if (!HasVAListArg) {
+ const FunctionType *FT =
+ Ty->getAsBlockPointerType()->getPointeeType()->getAsFunctionType();
+ if (const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(FT))
+ HasVAListArg = !Proto->isVariadic();
+ }
+ CheckPrintfArguments(TheCall, HasVAListArg, Format->getFormatIdx() - 1,
+ HasVAListArg ? 0 : Format->getFirstArg() - 1);
+ }
+ return move(TheCallResult);
+}
+
/// SemaBuiltinAtomicOverloaded - We have a call to a function like
/// __sync_fetch_and_add, which is an overloaded function based on the pointer
/// type of its first argument. The main ActOnCallExpr routines have already