| //===- ObjCMessage.cpp - Wrapper for ObjC messages and dot syntax -*- C++ -*--// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines ObjCMessage which serves as a common wrapper for ObjC |
| // message expressions or implicit messages for loading/storing ObjC properties. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/StaticAnalyzer/Core/PathSensitive/ObjCMessage.h" |
| #include "clang/AST/DeclCXX.h" |
| |
| using namespace clang; |
| using namespace ento; |
| |
| QualType CallOrObjCMessage::getResultType(ASTContext &ctx) const { |
| QualType resultTy; |
| bool isLVal = false; |
| |
| if (isObjCMessage()) { |
| resultTy = Msg.getResultType(ctx); |
| } else if (const CXXConstructExpr *Ctor = |
| CallE.dyn_cast<const CXXConstructExpr *>()) { |
| resultTy = Ctor->getType(); |
| } else { |
| const CallExpr *FunctionCall = CallE.get<const CallExpr *>(); |
| |
| isLVal = FunctionCall->isLValue(); |
| const Expr *Callee = FunctionCall->getCallee(); |
| if (const FunctionDecl *FD = State->getSVal(Callee, LCtx).getAsFunctionDecl()) |
| resultTy = FD->getResultType(); |
| else |
| resultTy = FunctionCall->getType(); |
| } |
| |
| if (isLVal) |
| resultTy = ctx.getPointerType(resultTy); |
| |
| return resultTy; |
| } |
| |
| SVal CallOrObjCMessage::getFunctionCallee() const { |
| assert(isFunctionCall()); |
| assert(!isCXXCall()); |
| const Expr *Fun = CallE.get<const CallExpr *>()->getCallee()->IgnoreParens(); |
| return State->getSVal(Fun, LCtx); |
| } |
| |
| SVal CallOrObjCMessage::getCXXCallee() const { |
| assert(isCXXCall()); |
| const CallExpr *ActualCall = CallE.get<const CallExpr *>(); |
| const Expr *callee = |
| cast<CXXMemberCallExpr>(ActualCall)->getImplicitObjectArgument(); |
| |
| // FIXME: Will eventually need to cope with member pointers. This is |
| // a limitation in getImplicitObjectArgument(). |
| if (!callee) |
| return UnknownVal(); |
| |
| return State->getSVal(callee, LCtx); |
| } |
| |
| SVal |
| CallOrObjCMessage::getInstanceMessageReceiver(const LocationContext *LC) const { |
| assert(isObjCMessage()); |
| return Msg.getInstanceReceiverSVal(State, LC); |
| } |
| |
| const Decl *CallOrObjCMessage::getDecl() const { |
| if (isCXXCall()) { |
| const CXXMemberCallExpr *CE = |
| cast<CXXMemberCallExpr>(CallE.dyn_cast<const CallExpr *>()); |
| assert(CE); |
| return CE->getMethodDecl(); |
| } else if (isObjCMessage()) { |
| return Msg.getMethodDecl(); |
| } else if (isFunctionCall()) { |
| // In case of a C style call, use the path sensitive information to find |
| // the function declaration. |
| SVal CalleeVal = getFunctionCallee(); |
| return CalleeVal.getAsFunctionDecl(); |
| } |
| return 0; |
| } |
| |