1740d490593e0de8732a697c9f77b90ddd463863bJordan Rose//===- Calls.cpp - Wrapper for all function and method calls ------*- C++ -*--// 2740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// 3740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// The LLVM Compiler Infrastructure 4740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// 5740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// This file is distributed under the University of Illinois Open Source 6740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// License. See LICENSE.TXT for details. 7740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// 8740d490593e0de8732a697c9f77b90ddd463863bJordan Rose//===----------------------------------------------------------------------===// 9740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// 10740d490593e0de8732a697c9f77b90ddd463863bJordan Rose/// \file This file defines CallEvent and its subclasses, which represent path- 11740d490593e0de8732a697c9f77b90ddd463863bJordan Rose/// sensitive instances of different kinds of function and method calls 12740d490593e0de8732a697c9f77b90ddd463863bJordan Rose/// (C, C++, and Objective-C). 13740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// 14740d490593e0de8732a697c9f77b90ddd463863bJordan Rose//===----------------------------------------------------------------------===// 15740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 16f540c54701e3eeb34cb619a3a4eb18f1ac70ef2dJordan Rose#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h" 17b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose#include "clang/AST/ParentMap.h" 1855fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Analysis/ProgramPoint.h" 1955fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h" 20740d490593e0de8732a697c9f77b90ddd463863bJordan Rose#include "llvm/ADT/SmallSet.h" 21de507eaf3cb54d3cb234dc14499c10ab3373d15fJordan Rose#include "llvm/ADT/StringExtras.h" 22a93d0f280693b8418bc88cf7a8c93325f7fcf4c6Benjamin Kramer#include "llvm/Support/raw_ostream.h" 23740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 24740d490593e0de8732a697c9f77b90ddd463863bJordan Roseusing namespace clang; 25740d490593e0de8732a697c9f77b90ddd463863bJordan Roseusing namespace ento; 26740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 27740d490593e0de8732a697c9f77b90ddd463863bJordan RoseQualType CallEvent::getResultType() const { 285699f62df144545702b91e91836a63db4e5f2627Jordan Rose const Expr *E = getOriginExpr(); 295699f62df144545702b91e91836a63db4e5f2627Jordan Rose assert(E && "Calls without origin expressions do not have results"); 305699f62df144545702b91e91836a63db4e5f2627Jordan Rose QualType ResultTy = E->getType(); 31740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 325699f62df144545702b91e91836a63db4e5f2627Jordan Rose ASTContext &Ctx = getState()->getStateManager().getContext(); 335699f62df144545702b91e91836a63db4e5f2627Jordan Rose 345699f62df144545702b91e91836a63db4e5f2627Jordan Rose // A function that returns a reference to 'int' will have a result type 355699f62df144545702b91e91836a63db4e5f2627Jordan Rose // of simply 'int'. Check the origin expr's value kind to recover the 365699f62df144545702b91e91836a63db4e5f2627Jordan Rose // proper type. 375699f62df144545702b91e91836a63db4e5f2627Jordan Rose switch (E->getValueKind()) { 385699f62df144545702b91e91836a63db4e5f2627Jordan Rose case VK_LValue: 395699f62df144545702b91e91836a63db4e5f2627Jordan Rose ResultTy = Ctx.getLValueReferenceType(ResultTy); 405699f62df144545702b91e91836a63db4e5f2627Jordan Rose break; 415699f62df144545702b91e91836a63db4e5f2627Jordan Rose case VK_XValue: 425699f62df144545702b91e91836a63db4e5f2627Jordan Rose ResultTy = Ctx.getRValueReferenceType(ResultTy); 435699f62df144545702b91e91836a63db4e5f2627Jordan Rose break; 445699f62df144545702b91e91836a63db4e5f2627Jordan Rose case VK_RValue: 455699f62df144545702b91e91836a63db4e5f2627Jordan Rose // No adjustment is necessary. 465699f62df144545702b91e91836a63db4e5f2627Jordan Rose break; 475699f62df144545702b91e91836a63db4e5f2627Jordan Rose } 48740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 49740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return ResultTy; 50740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 51740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 52740d490593e0de8732a697c9f77b90ddd463863bJordan Rosestatic bool isCallbackArg(SVal V, QualType T) { 53740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // If the parameter is 0, it's harmless. 54740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (V.isZeroConstant()) 55740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return false; 56740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 57740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // If a parameter is a block or a callback, assume it can modify pointer. 58740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (T->isBlockPointerType() || 59740d490593e0de8732a697c9f77b90ddd463863bJordan Rose T->isFunctionPointerType() || 60740d490593e0de8732a697c9f77b90ddd463863bJordan Rose T->isObjCSelType()) 61740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return true; 62740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 63740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // Check if a callback is passed inside a struct (for both, struct passed by 64740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // reference and by value). Dig just one level into the struct for now. 65740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 664e45dba1c0234eec7b7c348dbbf568c5ac9fc471Jordan Rose if (T->isAnyPointerType() || T->isReferenceType()) 67740d490593e0de8732a697c9f77b90ddd463863bJordan Rose T = T->getPointeeType(); 68740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 69740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (const RecordType *RT = T->getAsStructureType()) { 70740d490593e0de8732a697c9f77b90ddd463863bJordan Rose const RecordDecl *RD = RT->getDecl(); 71740d490593e0de8732a697c9f77b90ddd463863bJordan Rose for (RecordDecl::field_iterator I = RD->field_begin(), E = RD->field_end(); 72740d490593e0de8732a697c9f77b90ddd463863bJordan Rose I != E; ++I) { 73740d490593e0de8732a697c9f77b90ddd463863bJordan Rose QualType FieldT = I->getType(); 74740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (FieldT->isBlockPointerType() || FieldT->isFunctionPointerType()) 75740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return true; 76740d490593e0de8732a697c9f77b90ddd463863bJordan Rose } 77740d490593e0de8732a697c9f77b90ddd463863bJordan Rose } 78740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 79740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return false; 80740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 81740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 82740d490593e0de8732a697c9f77b90ddd463863bJordan Rosebool CallEvent::hasNonZeroCallbackArg() const { 83740d490593e0de8732a697c9f77b90ddd463863bJordan Rose unsigned NumOfArgs = getNumArgs(); 84740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 85740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // If calling using a function pointer, assume the function does not 86740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // have a callback. TODO: We could check the types of the arguments here. 87740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (!getDecl()) 88740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return false; 89740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 90740d490593e0de8732a697c9f77b90ddd463863bJordan Rose unsigned Idx = 0; 91740d490593e0de8732a697c9f77b90ddd463863bJordan Rose for (CallEvent::param_type_iterator I = param_type_begin(), 92740d490593e0de8732a697c9f77b90ddd463863bJordan Rose E = param_type_end(); 93740d490593e0de8732a697c9f77b90ddd463863bJordan Rose I != E && Idx < NumOfArgs; ++I, ++Idx) { 94740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (NumOfArgs <= Idx) 95740d490593e0de8732a697c9f77b90ddd463863bJordan Rose break; 96740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 97740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (isCallbackArg(getArgSVal(Idx), *I)) 98740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return true; 99740d490593e0de8732a697c9f77b90ddd463863bJordan Rose } 100740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 101740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return false; 102740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 103740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 1042f3017f9cbd3774f690c979410bfec38423d03afJordan Rosebool CallEvent::isGlobalCFunction(StringRef FunctionName) const { 1052f3017f9cbd3774f690c979410bfec38423d03afJordan Rose const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(getDecl()); 1062f3017f9cbd3774f690c979410bfec38423d03afJordan Rose if (!FD) 1072f3017f9cbd3774f690c979410bfec38423d03afJordan Rose return false; 1082f3017f9cbd3774f690c979410bfec38423d03afJordan Rose 1092f3017f9cbd3774f690c979410bfec38423d03afJordan Rose return CheckerContext::isCLibraryFunction(FD, FunctionName); 1102f3017f9cbd3774f690c979410bfec38423d03afJordan Rose} 1112f3017f9cbd3774f690c979410bfec38423d03afJordan Rose 112740d490593e0de8732a697c9f77b90ddd463863bJordan Rose/// \brief Returns true if a type is a pointer-to-const or reference-to-const 113740d490593e0de8732a697c9f77b90ddd463863bJordan Rose/// with no further indirection. 114740d490593e0de8732a697c9f77b90ddd463863bJordan Rosestatic bool isPointerToConst(QualType Ty) { 115740d490593e0de8732a697c9f77b90ddd463863bJordan Rose QualType PointeeTy = Ty->getPointeeType(); 116740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (PointeeTy == QualType()) 117740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return false; 118740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (!PointeeTy.isConstQualified()) 119740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return false; 120740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (PointeeTy->isAnyPointerType()) 121740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return false; 122740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return true; 123740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 124740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 125740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// Try to retrieve the function declaration and find the function parameter 126740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// types which are pointers/references to a non-pointer const. 12785d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose// We will not invalidate the corresponding argument regions. 128f8ddc098981d4d85cad4e72fc6dfcfe83b842b66Jordan Rosestatic void findPtrToConstParams(llvm::SmallSet<unsigned, 4> &PreserveArgs, 129740d490593e0de8732a697c9f77b90ddd463863bJordan Rose const CallEvent &Call) { 130740d490593e0de8732a697c9f77b90ddd463863bJordan Rose unsigned Idx = 0; 131740d490593e0de8732a697c9f77b90ddd463863bJordan Rose for (CallEvent::param_type_iterator I = Call.param_type_begin(), 13285d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose E = Call.param_type_end(); 133740d490593e0de8732a697c9f77b90ddd463863bJordan Rose I != E; ++I, ++Idx) { 134740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (isPointerToConst(*I)) 135740d490593e0de8732a697c9f77b90ddd463863bJordan Rose PreserveArgs.insert(Idx); 136740d490593e0de8732a697c9f77b90ddd463863bJordan Rose } 137740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 138740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 139740d490593e0de8732a697c9f77b90ddd463863bJordan RoseProgramStateRef CallEvent::invalidateRegions(unsigned BlockCount, 140f8ddc098981d4d85cad4e72fc6dfcfe83b842b66Jordan Rose ProgramStateRef Orig) const { 141b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose ProgramStateRef Result = (Orig ? Orig : getState()); 142740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 143658a28479dd775f6ff2c07fa5699a7ea01e04127Anna Zaks SmallVector<SVal, 8> ConstValues; 144658a28479dd775f6ff2c07fa5699a7ea01e04127Anna Zaks SmallVector<SVal, 8> ValuesToInvalidate; 145658a28479dd775f6ff2c07fa5699a7ea01e04127Anna Zaks 146658a28479dd775f6ff2c07fa5699a7ea01e04127Anna Zaks getExtraInvalidatedValues(ValuesToInvalidate); 147740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 148740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // Indexes of arguments whose values will be preserved by the call. 149f8ddc098981d4d85cad4e72fc6dfcfe83b842b66Jordan Rose llvm::SmallSet<unsigned, 4> PreserveArgs; 15085d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose if (!argumentsMayEscape()) 15185d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose findPtrToConstParams(PreserveArgs, *this); 152740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 153740d490593e0de8732a697c9f77b90ddd463863bJordan Rose for (unsigned Idx = 0, Count = getNumArgs(); Idx != Count; ++Idx) { 154f8ddc098981d4d85cad4e72fc6dfcfe83b842b66Jordan Rose // Mark this region for invalidation. We batch invalidate regions 155f8ddc098981d4d85cad4e72fc6dfcfe83b842b66Jordan Rose // below for efficiency. 156f8ddc098981d4d85cad4e72fc6dfcfe83b842b66Jordan Rose if (PreserveArgs.count(Idx)) 157658a28479dd775f6ff2c07fa5699a7ea01e04127Anna Zaks ConstValues.push_back(getArgSVal(Idx)); 158f8ddc098981d4d85cad4e72fc6dfcfe83b842b66Jordan Rose else 159658a28479dd775f6ff2c07fa5699a7ea01e04127Anna Zaks ValuesToInvalidate.push_back(getArgSVal(Idx)); 160740d490593e0de8732a697c9f77b90ddd463863bJordan Rose } 161740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 162740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // Invalidate designated regions using the batch invalidation API. 163740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // NOTE: Even if RegionsToInvalidate is empty, we may still invalidate 164740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // global variables. 165658a28479dd775f6ff2c07fa5699a7ea01e04127Anna Zaks return Result->invalidateRegions(ValuesToInvalidate, getOriginExpr(), 166b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose BlockCount, getLocationContext(), 1671655bcd052a67a3050fc55df8ecce57342352e68Anna Zaks /*CausedByPointerEscape*/ true, 168658a28479dd775f6ff2c07fa5699a7ea01e04127Anna Zaks /*Symbols=*/0, this, ConstValues); 169740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 170740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 17128038f33aa2db4833881fea757a1f0daf85ac02bJordan RoseProgramPoint CallEvent::getProgramPoint(bool IsPreVisit, 17228038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose const ProgramPointTag *Tag) const { 17328038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose if (const Expr *E = getOriginExpr()) { 17428038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose if (IsPreVisit) 175b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose return PreStmt(E, getLocationContext(), Tag); 176b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose return PostStmt(E, getLocationContext(), Tag); 17728038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose } 17828038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 17928038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose const Decl *D = getDecl(); 18028038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose assert(D && "Cannot get a program point without a statement or decl"); 18128038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 18228038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose SourceLocation Loc = getSourceRange().getBegin(); 18328038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose if (IsPreVisit) 184b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose return PreImplicitCall(D, Loc, getLocationContext(), Tag); 185b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose return PostImplicitCall(D, Loc, getLocationContext(), Tag); 18628038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose} 18728038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 1887c99aa385178c630e29f671299cdd9c104f1c885Jordan RoseSVal CallEvent::getArgSVal(unsigned Index) const { 1897c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose const Expr *ArgE = getArgExpr(Index); 1907c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose if (!ArgE) 1917c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose return UnknownVal(); 1927c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose return getSVal(ArgE); 1937c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose} 1947c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose 1957c99aa385178c630e29f671299cdd9c104f1c885Jordan RoseSourceRange CallEvent::getArgSourceRange(unsigned Index) const { 1967c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose const Expr *ArgE = getArgExpr(Index); 1977c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose if (!ArgE) 1987c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose return SourceRange(); 1997c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose return ArgE->getSourceRange(); 2007c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose} 2017c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose 2022f3017f9cbd3774f690c979410bfec38423d03afJordan RoseSVal CallEvent::getReturnValue() const { 2032f3017f9cbd3774f690c979410bfec38423d03afJordan Rose const Expr *E = getOriginExpr(); 2042f3017f9cbd3774f690c979410bfec38423d03afJordan Rose if (!E) 2052f3017f9cbd3774f690c979410bfec38423d03afJordan Rose return UndefinedVal(); 2062f3017f9cbd3774f690c979410bfec38423d03afJordan Rose return getSVal(E); 2072f3017f9cbd3774f690c979410bfec38423d03afJordan Rose} 2082f3017f9cbd3774f690c979410bfec38423d03afJordan Rose 20942c72c258e08ca79c9267346b4badcddd8fcd001Benjamin Kramervoid CallEvent::dump() const { 21042c72c258e08ca79c9267346b4badcddd8fcd001Benjamin Kramer dump(llvm::errs()); 21142c72c258e08ca79c9267346b4badcddd8fcd001Benjamin Kramer} 21242c72c258e08ca79c9267346b4badcddd8fcd001Benjamin Kramer 2137c99aa385178c630e29f671299cdd9c104f1c885Jordan Rosevoid CallEvent::dump(raw_ostream &Out) const { 2147c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose ASTContext &Ctx = getState()->getStateManager().getContext(); 2157c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose if (const Expr *E = getOriginExpr()) { 216d1420c6fa788669e49f21e184927c7833881e399Richard Smith E->printPretty(Out, 0, Ctx.getPrintingPolicy()); 2177c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose Out << "\n"; 2187c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose return; 2197c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose } 2207c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose 2217c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose if (const Decl *D = getDecl()) { 2227c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose Out << "Call to "; 2237c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose D->print(Out, Ctx.getPrintingPolicy()); 2247c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose return; 2257c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose } 2267c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose 2277c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose // FIXME: a string representation of the kind would be nice. 2287c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose Out << "Unknown call (type " << getKind() << ")"; 2297c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose} 2307c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose 23128038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 2326062334cc388bce69fb3978c4ecb26c6485a5c2bJordan Rosebool CallEvent::isCallStmt(const Stmt *S) { 2337c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose return isa<CallExpr>(S) || isa<ObjCMessageExpr>(S) 2346062334cc388bce69fb3978c4ecb26c6485a5c2bJordan Rose || isa<CXXConstructExpr>(S) 2356062334cc388bce69fb3978c4ecb26c6485a5c2bJordan Rose || isa<CXXNewExpr>(S); 23685d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose} 23716e6a7cb41319459ded69b4d47f405c1035dd347Anna Zaks 23816e6a7cb41319459ded69b4d47f405c1035dd347Anna ZaksQualType CallEvent::getDeclaredResultType(const Decl *D) { 23916e6a7cb41319459ded69b4d47f405c1035dd347Anna Zaks assert(D); 24016e6a7cb41319459ded69b4d47f405c1035dd347Anna Zaks if (const FunctionDecl* FD = dyn_cast<FunctionDecl>(D)) 24116e6a7cb41319459ded69b4d47f405c1035dd347Anna Zaks return FD->getResultType(); 242898be7b4a7b0a527d9bd2569eebc41a198e6e528Jordan Rose if (const ObjCMethodDecl* MD = dyn_cast<ObjCMethodDecl>(D)) 24316e6a7cb41319459ded69b4d47f405c1035dd347Anna Zaks return MD->getResultType(); 244898be7b4a7b0a527d9bd2569eebc41a198e6e528Jordan Rose if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) { 245898be7b4a7b0a527d9bd2569eebc41a198e6e528Jordan Rose // Blocks are difficult because the return type may not be stored in the 246898be7b4a7b0a527d9bd2569eebc41a198e6e528Jordan Rose // BlockDecl itself. The AST should probably be enhanced, but for now we 247898be7b4a7b0a527d9bd2569eebc41a198e6e528Jordan Rose // just do what we can. 248b347c76054a0a4b8e6d1fce44314f6daf3294c69Jordan Rose // If the block is declared without an explicit argument list, the 249b347c76054a0a4b8e6d1fce44314f6daf3294c69Jordan Rose // signature-as-written just includes the return type, not the entire 250b347c76054a0a4b8e6d1fce44314f6daf3294c69Jordan Rose // function type. 251eb41640fb417e25eb3218c2662a0dd512cdab04aJordan Rose // FIXME: All blocks should have signatures-as-written, even if the return 252b347c76054a0a4b8e6d1fce44314f6daf3294c69Jordan Rose // type is inferred. (That's signified with a dependent result type.) 253eb41640fb417e25eb3218c2662a0dd512cdab04aJordan Rose if (const TypeSourceInfo *TSI = BD->getSignatureAsWritten()) { 254b347c76054a0a4b8e6d1fce44314f6daf3294c69Jordan Rose QualType Ty = TSI->getType(); 255b347c76054a0a4b8e6d1fce44314f6daf3294c69Jordan Rose if (const FunctionType *FT = Ty->getAs<FunctionType>()) 256b347c76054a0a4b8e6d1fce44314f6daf3294c69Jordan Rose Ty = FT->getResultType(); 257b347c76054a0a4b8e6d1fce44314f6daf3294c69Jordan Rose if (!Ty->isDependentType()) 258b347c76054a0a4b8e6d1fce44314f6daf3294c69Jordan Rose return Ty; 259eb41640fb417e25eb3218c2662a0dd512cdab04aJordan Rose } 260898be7b4a7b0a527d9bd2569eebc41a198e6e528Jordan Rose 261898be7b4a7b0a527d9bd2569eebc41a198e6e528Jordan Rose return QualType(); 262898be7b4a7b0a527d9bd2569eebc41a198e6e528Jordan Rose } 263898be7b4a7b0a527d9bd2569eebc41a198e6e528Jordan Rose 26416e6a7cb41319459ded69b4d47f405c1035dd347Anna Zaks return QualType(); 26516e6a7cb41319459ded69b4d47f405c1035dd347Anna Zaks} 26685d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 267ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rosestatic void addParameterValuesToBindings(const StackFrameContext *CalleeCtx, 268ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose CallEvent::BindingsTy &Bindings, 269ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose SValBuilder &SVB, 270ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const CallEvent &Call, 271ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose CallEvent::param_iterator I, 272ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose CallEvent::param_iterator E) { 273ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose MemRegionManager &MRMgr = SVB.getRegionManager(); 27485d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 27537926da411d5a0047240b3ffd4dad0c4838aac57Pavel Labath // If the function has fewer parameters than the call has arguments, we simply 27637926da411d5a0047240b3ffd4dad0c4838aac57Pavel Labath // do not bind any values to them. 27737926da411d5a0047240b3ffd4dad0c4838aac57Pavel Labath unsigned NumArgs = Call.getNumArgs(); 278ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose unsigned Idx = 0; 27937926da411d5a0047240b3ffd4dad0c4838aac57Pavel Labath for (; I != E && Idx < NumArgs; ++I, ++Idx) { 280ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const ParmVarDecl *ParamDecl = *I; 281ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose assert(ParamDecl && "Formal parameter has no decl?"); 282ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 283ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose SVal ArgVal = Call.getArgSVal(Idx); 284ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (!ArgVal.isUnknown()) { 285ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose Loc ParamLoc = SVB.makeLoc(MRMgr.getVarRegion(ParamDecl, CalleeCtx)); 286ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose Bindings.push_back(std::make_pair(ParamLoc, ArgVal)); 287ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose } 288ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose } 289ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 290ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose // FIXME: Variadic arguments are not handled at all right now. 291ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose} 292ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 293ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 294ef15831780b705475e7b237ac16418e9b53cb7a6Jordan RoseCallEvent::param_iterator AnyFunctionCall::param_begin() const { 295ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const FunctionDecl *D = getDecl(); 296740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (!D) 297740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return 0; 298740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 299ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return D->param_begin(); 300740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 301740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 302ef15831780b705475e7b237ac16418e9b53cb7a6Jordan RoseCallEvent::param_iterator AnyFunctionCall::param_end() const { 303ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const FunctionDecl *D = getDecl(); 304740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (!D) 305740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return 0; 306740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 307ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return D->param_end(); 308ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose} 309ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 310ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rosevoid AnyFunctionCall::getInitialStackFrameContents( 311ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const StackFrameContext *CalleeCtx, 312ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose BindingsTy &Bindings) const { 313ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const FunctionDecl *D = cast<FunctionDecl>(CalleeCtx->getDecl()); 314ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose SValBuilder &SVB = getState()->getStateManager().getSValBuilder(); 315ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose addParameterValuesToBindings(CalleeCtx, Bindings, SVB, *this, 316ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose D->param_begin(), D->param_end()); 317740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 318740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 31985d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rosebool AnyFunctionCall::argumentsMayEscape() const { 320b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose if (hasNonZeroCallbackArg()) 32185d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose return true; 32285d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 32385d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose const FunctionDecl *D = getDecl(); 32485d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose if (!D) 32585d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose return true; 32685d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 32785d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose const IdentifierInfo *II = D->getIdentifier(); 32885d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose if (!II) 3293719ed248b7b7e239b1b435dd569b007aaea9d26Anna Zaks return false; 33085d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 33185d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose // This set of "escaping" APIs is 33285d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 33385d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose // - 'int pthread_setspecific(ptheread_key k, const void *)' stores a 33485d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose // value into thread local storage. The value can later be retrieved with 33585d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose // 'void *ptheread_getspecific(pthread_key)'. So even thought the 33685d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose // parameter is 'const void *', the region escapes through the call. 33785d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose if (II->isStr("pthread_setspecific")) 33885d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose return true; 33985d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 34085d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose // - xpc_connection_set_context stores a value which can be retrieved later 34185d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose // with xpc_connection_get_context. 34285d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose if (II->isStr("xpc_connection_set_context")) 34385d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose return true; 34485d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 34585d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose // - funopen - sets a buffer for future IO calls. 34685d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose if (II->isStr("funopen")) 34785d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose return true; 34885d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 34985d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose StringRef FName = II->getName(); 35085d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 35185d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose // - CoreFoundation functions that end with "NoCopy" can free a passed-in 35285d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose // buffer even if it is const. 35385d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose if (FName.endswith("NoCopy")) 35485d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose return true; 35585d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 35685d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose // - NSXXInsertXX, for example NSMapInsertIfAbsent, since they can 35785d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose // be deallocated by NSMapRemove. 35885d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose if (FName.startswith("NS") && (FName.find("Insert") != StringRef::npos)) 35985d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose return true; 36085d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 36185d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose // - Many CF containers allow objects to escape through custom 36285d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose // allocators/deallocators upon container construction. (PR12101) 36385d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose if (FName.startswith("CF") || FName.startswith("CG")) { 36485d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose return StrInStrNoCase(FName, "InsertValue") != StringRef::npos || 36585d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose StrInStrNoCase(FName, "AddValue") != StringRef::npos || 36685d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose StrInStrNoCase(FName, "SetValue") != StringRef::npos || 36785d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose StrInStrNoCase(FName, "WithData") != StringRef::npos || 36885d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose StrInStrNoCase(FName, "AppendValue") != StringRef::npos || 36985d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose StrInStrNoCase(FName, "SetAttribute") != StringRef::npos; 37085d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose } 37185d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 37285d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose return false; 37385d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose} 37485d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 37585d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 376740d490593e0de8732a697c9f77b90ddd463863bJordan Roseconst FunctionDecl *SimpleCall::getDecl() const { 377b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose const FunctionDecl *D = getOriginExpr()->getDirectCallee(); 378740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (D) 379740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return D; 380740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 381b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose return getSVal(getOriginExpr()->getCallee()).getAsFunctionDecl(); 382740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 383740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 38485d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 385645baeed6800f952e9ad1d5666e01080385531a2Jordan Roseconst FunctionDecl *CXXInstanceCall::getDecl() const { 386645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose const CallExpr *CE = cast_or_null<CallExpr>(getOriginExpr()); 387645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose if (!CE) 388645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose return AnyFunctionCall::getDecl(); 389645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose 390645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose const FunctionDecl *D = CE->getDirectCallee(); 391645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose if (D) 392645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose return D; 393645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose 394645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose return getSVal(CE->getCallee()).getAsFunctionDecl(); 395645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose} 396645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose 397658a28479dd775f6ff2c07fa5699a7ea01e04127Anna Zaksvoid CXXInstanceCall::getExtraInvalidatedValues(ValueList &Values) const { 398658a28479dd775f6ff2c07fa5699a7ea01e04127Anna Zaks Values.push_back(getCXXThisVal()); 399c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose} 400c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose 4016ebea89be233eaba5e29de8cf3524ad150c860bbJordan RoseSVal CXXInstanceCall::getCXXThisVal() const { 4026ebea89be233eaba5e29de8cf3524ad150c860bbJordan Rose const Expr *Base = getCXXThisExpr(); 4036ebea89be233eaba5e29de8cf3524ad150c860bbJordan Rose // FIXME: This doesn't handle an overloaded ->* operator. 4046ebea89be233eaba5e29de8cf3524ad150c860bbJordan Rose if (!Base) 4056ebea89be233eaba5e29de8cf3524ad150c860bbJordan Rose return UnknownVal(); 4066ebea89be233eaba5e29de8cf3524ad150c860bbJordan Rose 4076ebea89be233eaba5e29de8cf3524ad150c860bbJordan Rose SVal ThisVal = getSVal(Base); 4085251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie assert(ThisVal.isUnknownOrUndef() || ThisVal.getAs<Loc>()); 4096ebea89be233eaba5e29de8cf3524ad150c860bbJordan Rose return ThisVal; 4106ebea89be233eaba5e29de8cf3524ad150c860bbJordan Rose} 4116ebea89be233eaba5e29de8cf3524ad150c860bbJordan Rose 412c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose 413ddc0c4814788dda4ef224cd4d22d07154a6ede49Ted KremenekRuntimeDefinition CXXInstanceCall::getRuntimeDefinition() const { 4140ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose // Do we have a decl at all? 4159584f67b6da17283a31dedf0a1cab2d83a3d121cJordan Rose const Decl *D = getDecl(); 416c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose if (!D) 417e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks return RuntimeDefinition(); 418c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose 4190ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose // If the method is non-virtual, we know we can inline it. 420c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose const CXXMethodDecl *MD = cast<CXXMethodDecl>(D); 421c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose if (!MD->isVirtual()) 422ddc0c4814788dda4ef224cd4d22d07154a6ede49Ted Kremenek return AnyFunctionCall::getRuntimeDefinition(); 423c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose 4240ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose // Do we know the implicit 'this' object being called? 4250ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose const MemRegion *R = getCXXThisVal().getAsRegion(); 4260ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose if (!R) 4270ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose return RuntimeDefinition(); 4280ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose 4290ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose // Do we know anything about the type of 'this'? 4300ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose DynamicTypeInfo DynType = getState()->getDynamicTypeInfo(R); 4310ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose if (!DynType.isValid()) 4320ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose return RuntimeDefinition(); 4330ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose 4340ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose // Is the type a C++ class? (This is mostly a defensive check.) 4350ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose QualType RegionType = DynType.getType()->getPointeeType(); 4364e45dba1c0234eec7b7c348dbbf568c5ac9fc471Jordan Rose assert(!RegionType.isNull() && "DynamicTypeInfo should always be a pointer."); 4374e45dba1c0234eec7b7c348dbbf568c5ac9fc471Jordan Rose 4380ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose const CXXRecordDecl *RD = RegionType->getAsCXXRecordDecl(); 439fc87350ce0b279c82b1c9d2647063f4acf48a978Jordan Rose if (!RD || !RD->hasDefinition()) 4400ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose return RuntimeDefinition(); 4410ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose 442fe3769dbb448edf8e5ece13b14017608558d4763Jordan Rose // Find the decl for this method in that class. 443fe3769dbb448edf8e5ece13b14017608558d4763Jordan Rose const CXXMethodDecl *Result = MD->getCorrespondingMethodInClass(RD, true); 4448f0d0fef5f90b16600cdb802d5d7344417c34aadJordan Rose if (!Result) { 4458f0d0fef5f90b16600cdb802d5d7344417c34aadJordan Rose // We might not even get the original statically-resolved method due to 4468f0d0fef5f90b16600cdb802d5d7344417c34aadJordan Rose // some particularly nasty casting (e.g. casts to sister classes). 4478f0d0fef5f90b16600cdb802d5d7344417c34aadJordan Rose // However, we should at least be able to search up and down our own class 4488f0d0fef5f90b16600cdb802d5d7344417c34aadJordan Rose // hierarchy, and some real bugs have been caught by checking this. 4498f0d0fef5f90b16600cdb802d5d7344417c34aadJordan Rose assert(!RD->isDerivedFrom(MD->getParent()) && "Couldn't find known method"); 450d66b3c56a5da1cbaf5ec12811ee7221231b6c301Jordan Rose 451d66b3c56a5da1cbaf5ec12811ee7221231b6c301Jordan Rose // FIXME: This is checking that our DynamicTypeInfo is at least as good as 452d66b3c56a5da1cbaf5ec12811ee7221231b6c301Jordan Rose // the static type. However, because we currently don't update 453d66b3c56a5da1cbaf5ec12811ee7221231b6c301Jordan Rose // DynamicTypeInfo when an object is cast, we can't actually be sure the 454d66b3c56a5da1cbaf5ec12811ee7221231b6c301Jordan Rose // DynamicTypeInfo is up to date. This assert should be re-enabled once 455d66b3c56a5da1cbaf5ec12811ee7221231b6c301Jordan Rose // this is fixed. <rdar://problem/12287087> 456d66b3c56a5da1cbaf5ec12811ee7221231b6c301Jordan Rose //assert(!MD->getParent()->isDerivedFrom(RD) && "Bad DynamicTypeInfo"); 457d66b3c56a5da1cbaf5ec12811ee7221231b6c301Jordan Rose 4588f0d0fef5f90b16600cdb802d5d7344417c34aadJordan Rose return RuntimeDefinition(); 4598f0d0fef5f90b16600cdb802d5d7344417c34aadJordan Rose } 4600ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose 4610ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose // Does the decl that we found have an implementation? 4620ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose const FunctionDecl *Definition; 4630ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose if (!Result->hasBody(Definition)) 4640ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose return RuntimeDefinition(); 465c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose 4660ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose // We found a definition. If we're not sure that this devirtualization is 4670ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose // actually what will happen at runtime, make sure to provide the region so 4680ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose // that ExprEngine can decide what to do with it. 4690ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose if (DynType.canBeASubClass()) 4700ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose return RuntimeDefinition(Definition, R->StripCasts()); 4710ad36baedc516005cb6ea97d96327517ebfe5138Jordan Rose return RuntimeDefinition(Definition, /*DispatchRegion=*/0); 472c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose} 473c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose 474ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rosevoid CXXInstanceCall::getInitialStackFrameContents( 475ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const StackFrameContext *CalleeCtx, 476ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose BindingsTy &Bindings) const { 477ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose AnyFunctionCall::getInitialStackFrameContents(CalleeCtx, Bindings); 478ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 479b6d2bea04801cb66263de2f3fe99ef8e1dcd9f53Jordan Rose // Handle the binding of 'this' in the new stack frame. 480ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose SVal ThisVal = getCXXThisVal(); 481ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (!ThisVal.isUnknown()) { 482b6d2bea04801cb66263de2f3fe99ef8e1dcd9f53Jordan Rose ProgramStateManager &StateMgr = getState()->getStateManager(); 483b6d2bea04801cb66263de2f3fe99ef8e1dcd9f53Jordan Rose SValBuilder &SVB = StateMgr.getSValBuilder(); 4849f6441ad92c30028032eb3df6f4a7f2ebe393a68Jordan Rose 485ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const CXXMethodDecl *MD = cast<CXXMethodDecl>(CalleeCtx->getDecl()); 486ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose Loc ThisLoc = SVB.getCXXThis(MD, CalleeCtx); 487b6d2bea04801cb66263de2f3fe99ef8e1dcd9f53Jordan Rose 4889f6441ad92c30028032eb3df6f4a7f2ebe393a68Jordan Rose // If we devirtualized to a different member function, we need to make sure 4899f6441ad92c30028032eb3df6f4a7f2ebe393a68Jordan Rose // we have the proper layering of CXXBaseObjectRegions. 4909f6441ad92c30028032eb3df6f4a7f2ebe393a68Jordan Rose if (MD->getCanonicalDecl() != getDecl()->getCanonicalDecl()) { 4918ec104b9fffb917924c495ce3dd25694e4e3087aJordan Rose ASTContext &Ctx = SVB.getContext(); 492b6d2bea04801cb66263de2f3fe99ef8e1dcd9f53Jordan Rose const CXXRecordDecl *Class = MD->getParent(); 4938ec104b9fffb917924c495ce3dd25694e4e3087aJordan Rose QualType Ty = Ctx.getPointerType(Ctx.getRecordType(Class)); 494b6d2bea04801cb66263de2f3fe99ef8e1dcd9f53Jordan Rose 4958ec104b9fffb917924c495ce3dd25694e4e3087aJordan Rose // FIXME: CallEvent maybe shouldn't be directly accessing StoreManager. 4968ec104b9fffb917924c495ce3dd25694e4e3087aJordan Rose bool Failed; 4978ec104b9fffb917924c495ce3dd25694e4e3087aJordan Rose ThisVal = StateMgr.getStoreManager().evalDynamicCast(ThisVal, Ty, Failed); 4988ec104b9fffb917924c495ce3dd25694e4e3087aJordan Rose assert(!Failed && "Calling an incorrectly devirtualized method"); 499b6d2bea04801cb66263de2f3fe99ef8e1dcd9f53Jordan Rose } 500b6d2bea04801cb66263de2f3fe99ef8e1dcd9f53Jordan Rose 5019f6441ad92c30028032eb3df6f4a7f2ebe393a68Jordan Rose if (!ThisVal.isUnknown()) 5029f6441ad92c30028032eb3df6f4a7f2ebe393a68Jordan Rose Bindings.push_back(std::make_pair(ThisLoc, ThisVal)); 503ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose } 504ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose} 505ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 506ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 507c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose 5089da59a67a27a4d3fc9d59552f07808a32f85e9d3Jordan Roseconst Expr *CXXMemberCall::getCXXThisExpr() const { 5099da59a67a27a4d3fc9d59552f07808a32f85e9d3Jordan Rose return getOriginExpr()->getImplicitObjectArgument(); 510e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose} 511e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 512ddc0c4814788dda4ef224cd4d22d07154a6ede49Ted KremenekRuntimeDefinition CXXMemberCall::getRuntimeDefinition() const { 51300b4f64ecb26b031c1f4888f39be6c706156356aJordan Rose // C++11 [expr.call]p1: ...If the selected function is non-virtual, or if the 51400b4f64ecb26b031c1f4888f39be6c706156356aJordan Rose // id-expression in the class member access expression is a qualified-id, 51500b4f64ecb26b031c1f4888f39be6c706156356aJordan Rose // that function is called. Otherwise, its final overrider in the dynamic type 51600b4f64ecb26b031c1f4888f39be6c706156356aJordan Rose // of the object expression is called. 51700b4f64ecb26b031c1f4888f39be6c706156356aJordan Rose if (const MemberExpr *ME = dyn_cast<MemberExpr>(getOriginExpr()->getCallee())) 51800b4f64ecb26b031c1f4888f39be6c706156356aJordan Rose if (ME->hasQualifier()) 519ddc0c4814788dda4ef224cd4d22d07154a6ede49Ted Kremenek return AnyFunctionCall::getRuntimeDefinition(); 52000b4f64ecb26b031c1f4888f39be6c706156356aJordan Rose 521ddc0c4814788dda4ef224cd4d22d07154a6ede49Ted Kremenek return CXXInstanceCall::getRuntimeDefinition(); 52200b4f64ecb26b031c1f4888f39be6c706156356aJordan Rose} 52300b4f64ecb26b031c1f4888f39be6c706156356aJordan Rose 52485d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 5259da59a67a27a4d3fc9d59552f07808a32f85e9d3Jordan Roseconst Expr *CXXMemberOperatorCall::getCXXThisExpr() const { 5269da59a67a27a4d3fc9d59552f07808a32f85e9d3Jordan Rose return getOriginExpr()->getArg(0); 527e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose} 528e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 529fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose 530740d490593e0de8732a697c9f77b90ddd463863bJordan Roseconst BlockDataRegion *BlockCall::getBlockRegion() const { 531740d490593e0de8732a697c9f77b90ddd463863bJordan Rose const Expr *Callee = getOriginExpr()->getCallee(); 532740d490593e0de8732a697c9f77b90ddd463863bJordan Rose const MemRegion *DataReg = getSVal(Callee).getAsRegion(); 533740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 53469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose return dyn_cast_or_null<BlockDataRegion>(DataReg); 535740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 536740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 537ef15831780b705475e7b237ac16418e9b53cb7a6Jordan RoseCallEvent::param_iterator BlockCall::param_begin() const { 53869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const BlockDecl *D = getBlockDecl(); 53969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose if (!D) 54069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose return 0; 54169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose return D->param_begin(); 542740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 543740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 544ef15831780b705475e7b237ac16418e9b53cb7a6Jordan RoseCallEvent::param_iterator BlockCall::param_end() const { 54569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const BlockDecl *D = getBlockDecl(); 54669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose if (!D) 54769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose return 0; 54869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose return D->param_end(); 549740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 550740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 551658a28479dd775f6ff2c07fa5699a7ea01e04127Anna Zaksvoid BlockCall::getExtraInvalidatedValues(ValueList &Values) const { 55269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // FIXME: This also needs to invalidate captured globals. 55369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose if (const MemRegion *R = getBlockRegion()) 554658a28479dd775f6ff2c07fa5699a7ea01e04127Anna Zaks Values.push_back(loc::MemRegionVal(R)); 555740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 556740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 557ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rosevoid BlockCall::getInitialStackFrameContents(const StackFrameContext *CalleeCtx, 558ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose BindingsTy &Bindings) const { 559ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const BlockDecl *D = cast<BlockDecl>(CalleeCtx->getDecl()); 560ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose SValBuilder &SVB = getState()->getStateManager().getSValBuilder(); 561ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose addParameterValuesToBindings(CalleeCtx, Bindings, SVB, *this, 562ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose D->param_begin(), D->param_end()); 563ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose} 564ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 565ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 566e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan RoseSVal CXXConstructorCall::getCXXThisVal() const { 567b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose if (Data) 568b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose return loc::MemRegionVal(static_cast<const MemRegion *>(Data)); 569e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose return UnknownVal(); 570e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose} 571e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 572658a28479dd775f6ff2c07fa5699a7ea01e04127Anna Zaksvoid CXXConstructorCall::getExtraInvalidatedValues(ValueList &Values) const { 573b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose if (Data) 574658a28479dd775f6ff2c07fa5699a7ea01e04127Anna Zaks Values.push_back(loc::MemRegionVal(static_cast<const MemRegion *>(Data))); 575740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 576740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 577ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rosevoid CXXConstructorCall::getInitialStackFrameContents( 578ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const StackFrameContext *CalleeCtx, 579ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose BindingsTy &Bindings) const { 580ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose AnyFunctionCall::getInitialStackFrameContents(CalleeCtx, Bindings); 581ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 582ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose SVal ThisVal = getCXXThisVal(); 583ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (!ThisVal.isUnknown()) { 584ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose SValBuilder &SVB = getState()->getStateManager().getSValBuilder(); 585ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const CXXMethodDecl *MD = cast<CXXMethodDecl>(CalleeCtx->getDecl()); 586ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose Loc ThisLoc = SVB.getCXXThis(MD, CalleeCtx); 587ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose Bindings.push_back(std::make_pair(ThisLoc, ThisVal)); 588ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose } 589ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose} 590ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 591ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 59285d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 593e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan RoseSVal CXXDestructorCall::getCXXThisVal() const { 594b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose if (Data) 595200fa2e70d52ae6d620e81cd45536071fdde70c0Jordan Rose return loc::MemRegionVal(DtorDataTy::getFromOpaqueValue(Data).getPointer()); 596e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose return UnknownVal(); 597e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose} 598e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 599ddc0c4814788dda4ef224cd4d22d07154a6ede49Ted KremenekRuntimeDefinition CXXDestructorCall::getRuntimeDefinition() const { 600200fa2e70d52ae6d620e81cd45536071fdde70c0Jordan Rose // Base destructors are always called non-virtually. 601200fa2e70d52ae6d620e81cd45536071fdde70c0Jordan Rose // Skip CXXInstanceCall's devirtualization logic in this case. 602200fa2e70d52ae6d620e81cd45536071fdde70c0Jordan Rose if (isBaseDestructor()) 603ddc0c4814788dda4ef224cd4d22d07154a6ede49Ted Kremenek return AnyFunctionCall::getRuntimeDefinition(); 604200fa2e70d52ae6d620e81cd45536071fdde70c0Jordan Rose 605ddc0c4814788dda4ef224cd4d22d07154a6ede49Ted Kremenek return CXXInstanceCall::getRuntimeDefinition(); 606200fa2e70d52ae6d620e81cd45536071fdde70c0Jordan Rose} 607200fa2e70d52ae6d620e81cd45536071fdde70c0Jordan Rose 608ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 609ef15831780b705475e7b237ac16418e9b53cb7a6Jordan RoseCallEvent::param_iterator ObjCMethodCall::param_begin() const { 610ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const ObjCMethodDecl *D = getDecl(); 611740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (!D) 612740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return 0; 613740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 614ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return D->param_begin(); 615740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 616740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 617ef15831780b705475e7b237ac16418e9b53cb7a6Jordan RoseCallEvent::param_iterator ObjCMethodCall::param_end() const { 618ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const ObjCMethodDecl *D = getDecl(); 619740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (!D) 620740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return 0; 621740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 622ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return D->param_end(); 623740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 624740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 625740d490593e0de8732a697c9f77b90ddd463863bJordan Rosevoid 626658a28479dd775f6ff2c07fa5699a7ea01e04127Anna ZaksObjCMethodCall::getExtraInvalidatedValues(ValueList &Values) const { 627658a28479dd775f6ff2c07fa5699a7ea01e04127Anna Zaks Values.push_back(getReceiverSVal()); 628740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 629740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 6305a90193ad825656d4a03099cd5e9c928d1782b5eAnna ZaksSVal ObjCMethodCall::getSelfSVal() const { 6315a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks const LocationContext *LCtx = getLocationContext(); 6325a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks const ImplicitParamDecl *SelfDecl = LCtx->getSelfDecl(); 6335a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks if (!SelfDecl) 6345a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks return SVal(); 6355a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks return getState()->getSVal(getState()->getRegion(SelfDecl, LCtx)); 6365a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks} 6375a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks 638cde8cdbd6a662c636164465ad309b5f17ff01064Jordan RoseSVal ObjCMethodCall::getReceiverSVal() const { 639740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // FIXME: Is this the best way to handle class receivers? 640740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (!isInstanceMessage()) 641740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return UnknownVal(); 642740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 643c7ecc43c33a21b82c49664910b19fcc1f555aa51Anna Zaks if (const Expr *RecE = getOriginExpr()->getInstanceReceiver()) 644c7ecc43c33a21b82c49664910b19fcc1f555aa51Anna Zaks return getSVal(RecE); 645740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 646740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // An instance message with no expression means we are sending to super. 647740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // In this case the object reference is the same as 'self'. 6485a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks assert(getOriginExpr()->getReceiverKind() == ObjCMessageExpr::SuperInstance); 6495a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks SVal SelfVal = getSelfSVal(); 6505a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks assert(SelfVal.isValid() && "Calling super but not in ObjC method"); 6515a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks return SelfVal; 6525a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks} 6535a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks 6545a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaksbool ObjCMethodCall::isReceiverSelfOrSuper() const { 6555a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks if (getOriginExpr()->getReceiverKind() == ObjCMessageExpr::SuperInstance || 6565a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks getOriginExpr()->getReceiverKind() == ObjCMessageExpr::SuperClass) 6575a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks return true; 6585a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks 6595a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks if (!isInstanceMessage()) 6605a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks return false; 6615a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks 6625a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks SVal RecVal = getSVal(getOriginExpr()->getInstanceReceiver()); 6635a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks 6645a90193ad825656d4a03099cd5e9c928d1782b5eAnna Zaks return (RecVal == getSelfSVal()); 665b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose} 666b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose 6678919e688dc610d1f632a4d43f7f1489f67255476Jordan RoseSourceRange ObjCMethodCall::getSourceRange() const { 6688919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose switch (getMessageKind()) { 6698919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose case OCM_Message: 6708919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose return getOriginExpr()->getSourceRange(); 6718919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose case OCM_PropertyAccess: 6728919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose case OCM_Subscript: 6738919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose return getContainingPseudoObjectExpr()->getSourceRange(); 6748919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose } 6757c30427afb4c2171ee4d336477f5e4d7c277ccb4Richard Smith llvm_unreachable("unknown message kind"); 6768919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose} 6778919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose 6788919e688dc610d1f632a4d43f7f1489f67255476Jordan Rosetypedef llvm::PointerIntPair<const PseudoObjectExpr *, 2> ObjCMessageDataTy; 6798919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose 6808919e688dc610d1f632a4d43f7f1489f67255476Jordan Roseconst PseudoObjectExpr *ObjCMethodCall::getContainingPseudoObjectExpr() const { 6818919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose assert(Data != 0 && "Lazy lookup not yet performed."); 6828919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose assert(getMessageKind() != OCM_Message && "Explicit message send."); 6838919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose return ObjCMessageDataTy::getFromOpaqueValue(Data).getPointer(); 6848919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose} 6858919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose 6868919e688dc610d1f632a4d43f7f1489f67255476Jordan RoseObjCMessageKind ObjCMethodCall::getMessageKind() const { 6878919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose if (Data == 0) { 6888919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose ParentMap &PM = getLocationContext()->getParentMap(); 6898919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose const Stmt *S = PM.getParent(getOriginExpr()); 6908919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose if (const PseudoObjectExpr *POE = dyn_cast_or_null<PseudoObjectExpr>(S)) { 6918919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose const Expr *Syntactic = POE->getSyntacticForm(); 6928919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose 6938919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose // This handles the funny case of assigning to the result of a getter. 6948919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose // This can happen if the getter returns a non-const reference. 6958919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(Syntactic)) 6968919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose Syntactic = BO->getLHS(); 6978919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose 6988919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose ObjCMessageKind K; 6998919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose switch (Syntactic->getStmtClass()) { 7008919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose case Stmt::ObjCPropertyRefExprClass: 7018919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose K = OCM_PropertyAccess; 7028919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose break; 7038919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose case Stmt::ObjCSubscriptRefExprClass: 7048919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose K = OCM_Subscript; 7058919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose break; 7068919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose default: 7078919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose // FIXME: Can this ever happen? 7088919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose K = OCM_Message; 7098919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose break; 7108919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose } 7118919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose 7128919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose if (K != OCM_Message) { 7138919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose const_cast<ObjCMethodCall *>(this)->Data 7148919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose = ObjCMessageDataTy(POE, K).getOpaqueValue(); 7158919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose assert(getMessageKind() == K); 7168919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose return K; 7178919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose } 7188919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose } 7198919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose 7208919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose const_cast<ObjCMethodCall *>(this)->Data 7218919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose = ObjCMessageDataTy(0, 1).getOpaqueValue(); 7228919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose assert(getMessageKind() == OCM_Message); 7238919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose return OCM_Message; 7248919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose } 7258919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose 7268919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose ObjCMessageDataTy Info = ObjCMessageDataTy::getFromOpaqueValue(Data); 7278919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose if (!Info.getPointer()) 7288919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose return OCM_Message; 7298919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose return static_cast<ObjCMessageKind>(Info.getInt()); 730740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 7319dc5167e4017ef4c8b327abb6f72225eec2e0f19Anna Zaks 7323f558af01643787d209a133215b0abec81b5fe30Anna Zaks 7333f558af01643787d209a133215b0abec81b5fe30Anna Zaksbool ObjCMethodCall::canBeOverridenInSubclass(ObjCInterfaceDecl *IDecl, 7343f558af01643787d209a133215b0abec81b5fe30Anna Zaks Selector Sel) const { 7353f558af01643787d209a133215b0abec81b5fe30Anna Zaks assert(IDecl); 7363f558af01643787d209a133215b0abec81b5fe30Anna Zaks const SourceManager &SM = 7373f558af01643787d209a133215b0abec81b5fe30Anna Zaks getState()->getStateManager().getContext().getSourceManager(); 7383f558af01643787d209a133215b0abec81b5fe30Anna Zaks 7393f558af01643787d209a133215b0abec81b5fe30Anna Zaks // If the class interface is declared inside the main file, assume it is not 7403f558af01643787d209a133215b0abec81b5fe30Anna Zaks // subcassed. 7413f558af01643787d209a133215b0abec81b5fe30Anna Zaks // TODO: It could actually be subclassed if the subclass is private as well. 7423f558af01643787d209a133215b0abec81b5fe30Anna Zaks // This is probably very rare. 7433f558af01643787d209a133215b0abec81b5fe30Anna Zaks SourceLocation InterfLoc = IDecl->getEndOfDefinitionLoc(); 7443f558af01643787d209a133215b0abec81b5fe30Anna Zaks if (InterfLoc.isValid() && SM.isFromMainFile(InterfLoc)) 7453f558af01643787d209a133215b0abec81b5fe30Anna Zaks return false; 7463f558af01643787d209a133215b0abec81b5fe30Anna Zaks 74738aee3bb4ffe14c8323785ae2fafed6f627fb577Anna Zaks // Assume that property accessors are not overridden. 74838aee3bb4ffe14c8323785ae2fafed6f627fb577Anna Zaks if (getMessageKind() == OCM_PropertyAccess) 74938aee3bb4ffe14c8323785ae2fafed6f627fb577Anna Zaks return false; 7503f558af01643787d209a133215b0abec81b5fe30Anna Zaks 7513f558af01643787d209a133215b0abec81b5fe30Anna Zaks // We assume that if the method is public (declared outside of main file) or 7523f558af01643787d209a133215b0abec81b5fe30Anna Zaks // has a parent which publicly declares the method, the method could be 7533f558af01643787d209a133215b0abec81b5fe30Anna Zaks // overridden in a subclass. 7543f558af01643787d209a133215b0abec81b5fe30Anna Zaks 7553f558af01643787d209a133215b0abec81b5fe30Anna Zaks // Find the first declaration in the class hierarchy that declares 7563f558af01643787d209a133215b0abec81b5fe30Anna Zaks // the selector. 7573f558af01643787d209a133215b0abec81b5fe30Anna Zaks ObjCMethodDecl *D = 0; 7583f558af01643787d209a133215b0abec81b5fe30Anna Zaks while (true) { 7593f558af01643787d209a133215b0abec81b5fe30Anna Zaks D = IDecl->lookupMethod(Sel, true); 7603f558af01643787d209a133215b0abec81b5fe30Anna Zaks 7613f558af01643787d209a133215b0abec81b5fe30Anna Zaks // Cannot find a public definition. 7623f558af01643787d209a133215b0abec81b5fe30Anna Zaks if (!D) 7633f558af01643787d209a133215b0abec81b5fe30Anna Zaks return false; 7643f558af01643787d209a133215b0abec81b5fe30Anna Zaks 7653f558af01643787d209a133215b0abec81b5fe30Anna Zaks // If outside the main file, 7663f558af01643787d209a133215b0abec81b5fe30Anna Zaks if (D->getLocation().isValid() && !SM.isFromMainFile(D->getLocation())) 7673f558af01643787d209a133215b0abec81b5fe30Anna Zaks return true; 7683f558af01643787d209a133215b0abec81b5fe30Anna Zaks 7693f558af01643787d209a133215b0abec81b5fe30Anna Zaks if (D->isOverriding()) { 7703f558af01643787d209a133215b0abec81b5fe30Anna Zaks // Search in the superclass on the next iteration. 7713f558af01643787d209a133215b0abec81b5fe30Anna Zaks IDecl = D->getClassInterface(); 7723f558af01643787d209a133215b0abec81b5fe30Anna Zaks if (!IDecl) 7733f558af01643787d209a133215b0abec81b5fe30Anna Zaks return false; 7743f558af01643787d209a133215b0abec81b5fe30Anna Zaks 7753f558af01643787d209a133215b0abec81b5fe30Anna Zaks IDecl = IDecl->getSuperClass(); 7763f558af01643787d209a133215b0abec81b5fe30Anna Zaks if (!IDecl) 7773f558af01643787d209a133215b0abec81b5fe30Anna Zaks return false; 7783f558af01643787d209a133215b0abec81b5fe30Anna Zaks 7793f558af01643787d209a133215b0abec81b5fe30Anna Zaks continue; 7803f558af01643787d209a133215b0abec81b5fe30Anna Zaks } 7813f558af01643787d209a133215b0abec81b5fe30Anna Zaks 7823f558af01643787d209a133215b0abec81b5fe30Anna Zaks return false; 7833f558af01643787d209a133215b0abec81b5fe30Anna Zaks }; 7843f558af01643787d209a133215b0abec81b5fe30Anna Zaks 7853f558af01643787d209a133215b0abec81b5fe30Anna Zaks llvm_unreachable("The while loop should always terminate."); 7863f558af01643787d209a133215b0abec81b5fe30Anna Zaks} 7873f558af01643787d209a133215b0abec81b5fe30Anna Zaks 788ddc0c4814788dda4ef224cd4d22d07154a6ede49Ted KremenekRuntimeDefinition ObjCMethodCall::getRuntimeDefinition() const { 7892d18419a7c8f9a2975d4ed74a202de6467308ad1Anna Zaks const ObjCMessageExpr *E = getOriginExpr(); 7902d18419a7c8f9a2975d4ed74a202de6467308ad1Anna Zaks assert(E); 791f0324d33967f28758f7243c7bb1a469c5a0394b6Anna Zaks Selector Sel = E->getSelector(); 7922d18419a7c8f9a2975d4ed74a202de6467308ad1Anna Zaks 7932d18419a7c8f9a2975d4ed74a202de6467308ad1Anna Zaks if (E->isInstanceMessage()) { 794f0324d33967f28758f7243c7bb1a469c5a0394b6Anna Zaks 795f0324d33967f28758f7243c7bb1a469c5a0394b6Anna Zaks // Find the the receiver type. 796f0324d33967f28758f7243c7bb1a469c5a0394b6Anna Zaks const ObjCObjectPointerType *ReceiverT = 0; 79754918ba02ba900c0e0bb4fd3d749b6b1ac4e50a9Anna Zaks bool CanBeSubClassed = false; 798f0324d33967f28758f7243c7bb1a469c5a0394b6Anna Zaks QualType SupersType = E->getSuperType(); 799e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks const MemRegion *Receiver = 0; 800e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 801f0324d33967f28758f7243c7bb1a469c5a0394b6Anna Zaks if (!SupersType.isNull()) { 802e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // Super always means the type of immediate predecessor to the method 803e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // where the call occurs. 8048ed21ef726be89ef7151b5ff397631379bd8a537Anna Zaks ReceiverT = cast<ObjCObjectPointerType>(SupersType); 805f0324d33967f28758f7243c7bb1a469c5a0394b6Anna Zaks } else { 806e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks Receiver = getReceiverSVal().getAsRegion(); 8074fe64ad383c056774087113561063429103ac9a6Jordan Rose if (!Receiver) 808e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks return RuntimeDefinition(); 8094fe64ad383c056774087113561063429103ac9a6Jordan Rose 81054918ba02ba900c0e0bb4fd3d749b6b1ac4e50a9Anna Zaks DynamicTypeInfo DTI = getState()->getDynamicTypeInfo(Receiver); 81154918ba02ba900c0e0bb4fd3d749b6b1ac4e50a9Anna Zaks QualType DynType = DTI.getType(); 81254918ba02ba900c0e0bb4fd3d749b6b1ac4e50a9Anna Zaks CanBeSubClassed = DTI.canBeASubClass(); 8138ed21ef726be89ef7151b5ff397631379bd8a537Anna Zaks ReceiverT = dyn_cast<ObjCObjectPointerType>(DynType); 81454918ba02ba900c0e0bb4fd3d749b6b1ac4e50a9Anna Zaks 81554918ba02ba900c0e0bb4fd3d749b6b1ac4e50a9Anna Zaks if (ReceiverT && CanBeSubClassed) 81654918ba02ba900c0e0bb4fd3d749b6b1ac4e50a9Anna Zaks if (ObjCInterfaceDecl *IDecl = ReceiverT->getInterfaceDecl()) 81754918ba02ba900c0e0bb4fd3d749b6b1ac4e50a9Anna Zaks if (!canBeOverridenInSubclass(IDecl, Sel)) 81854918ba02ba900c0e0bb4fd3d749b6b1ac4e50a9Anna Zaks CanBeSubClassed = false; 8199dc5167e4017ef4c8b327abb6f72225eec2e0f19Anna Zaks } 8209dc5167e4017ef4c8b327abb6f72225eec2e0f19Anna Zaks 821f0324d33967f28758f7243c7bb1a469c5a0394b6Anna Zaks // Lookup the method implementation. 822f0324d33967f28758f7243c7bb1a469c5a0394b6Anna Zaks if (ReceiverT) 8233f558af01643787d209a133215b0abec81b5fe30Anna Zaks if (ObjCInterfaceDecl *IDecl = ReceiverT->getInterfaceDecl()) { 824bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek // Repeatedly calling lookupPrivateMethod() is expensive, especially 825bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek // when in many cases it returns null. We cache the results so 826bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek // that repeated queries on the same ObjCIntefaceDecl and Selector 827bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek // don't incur the same cost. On some test cases, we can see the 828bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek // same query being issued thousands of times. 829bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek // 830bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek // NOTE: This cache is essentially a "global" variable, but it 831bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek // only gets lazily created when we get here. The value of the 832bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek // cache probably comes from it being global across ExprEngines, 833bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek // where the same queries may get issued. If we are worried about 834bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek // concurrency, or possibly loading/unloading ASTs, etc., we may 835bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek // need to revisit this someday. In terms of memory, this table 836bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek // stays around until clang quits, which also may be bad if we 837bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek // need to release memory. 838bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek typedef std::pair<const ObjCInterfaceDecl*, Selector> 839bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek PrivateMethodKey; 840bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek typedef llvm::DenseMap<PrivateMethodKey, 841dc84cd5efdd3430efb22546b4ac656aa0540b210David Blaikie Optional<const ObjCMethodDecl *> > 842bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek PrivateMethodCache; 843bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek 844bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek static PrivateMethodCache PMC; 845dc84cd5efdd3430efb22546b4ac656aa0540b210David Blaikie Optional<const ObjCMethodDecl *> &Val = PMC[std::make_pair(IDecl, Sel)]; 846bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek 847bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek // Query lookupPrivateMethod() if the cache does not hit. 848bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek if (!Val.hasValue()) 849bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek Val = IDecl->lookupPrivateMethod(Sel); 850bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek 851bf25fb1e2eaea0eadb90d1a9ce91e7d510c8972aTed Kremenek const ObjCMethodDecl *MD = Val.getValue(); 85254918ba02ba900c0e0bb4fd3d749b6b1ac4e50a9Anna Zaks if (CanBeSubClassed) 85354918ba02ba900c0e0bb4fd3d749b6b1ac4e50a9Anna Zaks return RuntimeDefinition(MD, Receiver); 8543f558af01643787d209a133215b0abec81b5fe30Anna Zaks else 85554918ba02ba900c0e0bb4fd3d749b6b1ac4e50a9Anna Zaks return RuntimeDefinition(MD, 0); 8563f558af01643787d209a133215b0abec81b5fe30Anna Zaks } 857f0324d33967f28758f7243c7bb1a469c5a0394b6Anna Zaks 8582d18419a7c8f9a2975d4ed74a202de6467308ad1Anna Zaks } else { 8592d18419a7c8f9a2975d4ed74a202de6467308ad1Anna Zaks // This is a class method. 8602d18419a7c8f9a2975d4ed74a202de6467308ad1Anna Zaks // If we have type info for the receiver class, we are calling via 8612d18419a7c8f9a2975d4ed74a202de6467308ad1Anna Zaks // class name. 8622d18419a7c8f9a2975d4ed74a202de6467308ad1Anna Zaks if (ObjCInterfaceDecl *IDecl = E->getReceiverInterface()) { 8632d18419a7c8f9a2975d4ed74a202de6467308ad1Anna Zaks // Find/Return the method implementation. 8645960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return RuntimeDefinition(IDecl->lookupPrivateClassMethod(Sel)); 8652d18419a7c8f9a2975d4ed74a202de6467308ad1Anna Zaks } 8669dc5167e4017ef4c8b327abb6f72225eec2e0f19Anna Zaks } 8672d18419a7c8f9a2975d4ed74a202de6467308ad1Anna Zaks 868e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks return RuntimeDefinition(); 8699dc5167e4017ef4c8b327abb6f72225eec2e0f19Anna Zaks} 8709dc5167e4017ef4c8b327abb6f72225eec2e0f19Anna Zaks 871ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rosevoid ObjCMethodCall::getInitialStackFrameContents( 872ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const StackFrameContext *CalleeCtx, 873ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose BindingsTy &Bindings) const { 874ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const ObjCMethodDecl *D = cast<ObjCMethodDecl>(CalleeCtx->getDecl()); 875ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose SValBuilder &SVB = getState()->getStateManager().getSValBuilder(); 876ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose addParameterValuesToBindings(CalleeCtx, Bindings, SVB, *this, 877ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose D->param_begin(), D->param_end()); 878ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 879ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose SVal SelfVal = getReceiverSVal(); 880ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (!SelfVal.isUnknown()) { 881ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const VarDecl *SelfD = CalleeCtx->getAnalysisDeclContext()->getSelfDecl(); 882ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose MemRegionManager &MRMgr = SVB.getRegionManager(); 883ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose Loc SelfLoc = SVB.makeLoc(MRMgr.getVarRegion(SelfD, CalleeCtx)); 884ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose Bindings.push_back(std::make_pair(SelfLoc, SelfVal)); 885ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose } 886ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose} 887ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 888645baeed6800f952e9ad1d5666e01080385531a2Jordan RoseCallEventRef<> 889d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan RoseCallEventManager::getSimpleCall(const CallExpr *CE, ProgramStateRef State, 890d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose const LocationContext *LCtx) { 891d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (const CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(CE)) 892d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose return create<CXXMemberCall>(MCE, State, LCtx); 893d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 894d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (const CXXOperatorCallExpr *OpCE = dyn_cast<CXXOperatorCallExpr>(CE)) { 895d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose const FunctionDecl *DirectCallee = OpCE->getDirectCallee(); 896d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(DirectCallee)) 897d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (MD->isInstance()) 898d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose return create<CXXMemberOperatorCall>(OpCE, State, LCtx); 899d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 900d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose } else if (CE->getCallee()->getType()->isBlockPointerType()) { 901d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose return create<BlockCall>(CE, State, LCtx); 902d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose } 903d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 904d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // Otherwise, it's a normal function call, static member function call, or 905d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // something we can't reason about. 906d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose return create<FunctionCall>(CE, State, LCtx); 907d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose} 90857c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 90957c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 91057c033621dacd8720ac9ff65a09025f14f70e22fJordan RoseCallEventRef<> 91157c033621dacd8720ac9ff65a09025f14f70e22fJordan RoseCallEventManager::getCaller(const StackFrameContext *CalleeCtx, 91257c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose ProgramStateRef State) { 91357c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose const LocationContext *ParentCtx = CalleeCtx->getParent(); 91457c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose const LocationContext *CallerCtx = ParentCtx->getCurrentStackFrame(); 91557c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose assert(CallerCtx && "This should not be used for top-level stack frames"); 91657c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 91757c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose const Stmt *CallSite = CalleeCtx->getCallSite(); 91857c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 91957c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose if (CallSite) { 92057c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose if (const CallExpr *CE = dyn_cast<CallExpr>(CallSite)) 92157c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose return getSimpleCall(CE, State, CallerCtx); 92257c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 92357c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose switch (CallSite->getStmtClass()) { 924827eeb63614309bafac9d77a5a3a7ca81f1e4751Jordan Rose case Stmt::CXXConstructExprClass: 925827eeb63614309bafac9d77a5a3a7ca81f1e4751Jordan Rose case Stmt::CXXTemporaryObjectExprClass: { 92657c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose SValBuilder &SVB = State->getStateManager().getSValBuilder(); 92757c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose const CXXMethodDecl *Ctor = cast<CXXMethodDecl>(CalleeCtx->getDecl()); 92857c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose Loc ThisPtr = SVB.getCXXThis(Ctor, CalleeCtx); 92957c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose SVal ThisVal = State->getSVal(ThisPtr); 93057c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 93157c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose return getCXXConstructorCall(cast<CXXConstructExpr>(CallSite), 93257c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose ThisVal.getAsRegion(), State, CallerCtx); 93357c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } 93457c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose case Stmt::CXXNewExprClass: 93557c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose return getCXXAllocatorCall(cast<CXXNewExpr>(CallSite), State, CallerCtx); 93657c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose case Stmt::ObjCMessageExprClass: 93757c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose return getObjCMethodCall(cast<ObjCMessageExpr>(CallSite), 93857c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose State, CallerCtx); 93957c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose default: 94057c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose llvm_unreachable("This is not an inlineable statement."); 94157c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } 94257c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } 94357c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 94457c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose // Fall back to the CFG. The only thing we haven't handled yet is 94557c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose // destructors, though this could change in the future. 94657c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose const CFGBlock *B = CalleeCtx->getCallSiteBlock(); 94757c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose CFGElement E = (*B)[CalleeCtx->getIndex()]; 948fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie assert(E.getAs<CFGImplicitDtor>() && 949fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie "All other CFG elements should have exprs"); 950fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie assert(!E.getAs<CFGTemporaryDtor>() && "We don't handle temporaries yet"); 95157c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 95257c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose SValBuilder &SVB = State->getStateManager().getSValBuilder(); 95357c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose const CXXDestructorDecl *Dtor = cast<CXXDestructorDecl>(CalleeCtx->getDecl()); 95457c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose Loc ThisPtr = SVB.getCXXThis(Dtor, CalleeCtx); 95557c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose SVal ThisVal = State->getSVal(ThisPtr); 95657c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 95757c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose const Stmt *Trigger; 958b07805485c603be3d8011f72611465324c9e664bDavid Blaikie if (Optional<CFGAutomaticObjDtor> AutoDtor = E.getAs<CFGAutomaticObjDtor>()) 959b07805485c603be3d8011f72611465324c9e664bDavid Blaikie Trigger = AutoDtor->getTriggerStmt(); 96057c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose else 96157c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose Trigger = Dtor->getBody(); 96257c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 96357c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose return getCXXDestructorCall(Dtor, Trigger, ThisVal.getAsRegion(), 964b07805485c603be3d8011f72611465324c9e664bDavid Blaikie E.getAs<CFGBaseDtor>().hasValue(), State, 965b07805485c603be3d8011f72611465324c9e664bDavid Blaikie CallerCtx); 96657c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose} 967