ExprEngine.cpp revision 5fe98728dca1f3a7a378ce1a21984a0f8a0c0b8b
1d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis//=-- ExprEngine.cpp - Path-Sensitive Expression-Level Dataflow ---*- C++ -*-= 264924859b6b09d1cfb62fecf5954ec6c27cb58feTed Kremenek// 34af84313df0d2710fd57af89132e680294225cadTed Kremenek// The LLVM Compiler Infrastructure 4d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek// 5d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek// This file is distributed under the University of Illinois Open Source 6d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek// License. See LICENSE.TXT for details. 7d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek// 8d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek//===----------------------------------------------------------------------===// 9d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek// 1077349cb20bfd7069d081f84c91975bfa8ef60a32Ted Kremenek// This file defines a meta-engine for path-sensitive dataflow analysis that 1177349cb20bfd7069d081f84c91975bfa8ef60a32Ted Kremenek// is built on GREngine, but provides the boilerplate to execute transfer 1277349cb20bfd7069d081f84c91975bfa8ef60a32Ted Kremenek// functions and build the ExplodedGraph at the expression level. 13d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek// 14d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek//===----------------------------------------------------------------------===// 15a7af5ea88a6c5bdf87497cca6c20831e8c546751Argyrios Kyrtzidis 1643dee220252ef0b42c5f8a3bb1eca97f84f2565fArgyrios Kyrtzidis#include "clang/StaticAnalyzer/Core/CheckerManager.h" 179b663716449b618ba0390b1dbebc54fa8e971124Ted Kremenek#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h" 189b663716449b618ba0390b1dbebc54fa8e971124Ted Kremenek#include "clang/StaticAnalyzer/Core/PathSensitive/AnalysisManager.h" 199b663716449b618ba0390b1dbebc54fa8e971124Ted Kremenek#include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h" 209b663716449b618ba0390b1dbebc54fa8e971124Ted Kremenek#include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngineBuilders.h" 21199c3d6cd16aebbb9c7f0d42af9d922c9628bf70Ken Dyck#include "clang/AST/CharUnits.h" 2216f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/AST/ParentMap.h" 2316f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/AST/StmtObjC.h" 24c506357c3778092c2a3251243f12524e8eb89274Zhongxing Xu#include "clang/AST/DeclCXX.h" 251b63e4f732dbc73d90abf886b4d21f8e3a165f6dChris Lattner#include "clang/Basic/Builtins.h" 2616f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/Basic/SourceManager.h" 27e97ca065c91ff9ca2a2a42eb443eaa553c40441cTed Kremenek#include "clang/Basic/SourceManager.h" 280bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek#include "clang/Basic/PrettyStackTrace.h" 29a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek#include "llvm/Support/raw_ostream.h" 306cb7c1a43b0c8f739d1f54b7fdae5ede86033496Benjamin Kramer#include "llvm/ADT/ImmutableList.h" 314323a57627e796dcfdfdb7d47672dc09ed308edaTed Kremenek 320f5f0595d6a038843a7051c5a65fca7bce2915a0Ted Kremenek#ifndef NDEBUG 330f5f0595d6a038843a7051c5a65fca7bce2915a0Ted Kremenek#include "llvm/Support/GraphWriter.h" 340f5f0595d6a038843a7051c5a65fca7bce2915a0Ted Kremenek#endif 350f5f0595d6a038843a7051c5a65fca7bce2915a0Ted Kremenek 36b387a3f23e423d62c053be86294b703da1d1a222Ted Kremenekusing namespace clang; 379ef6537a894c33003359b1f9b9676e9178e028b7Ted Kremenekusing namespace ento; 38b387a3f23e423d62c053be86294b703da1d1a222Ted Kremenekusing llvm::dyn_cast; 39852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenekusing llvm::dyn_cast_or_null; 40b387a3f23e423d62c053be86294b703da1d1a222Ted Kremenekusing llvm::cast; 41b387a3f23e423d62c053be86294b703da1d1a222Ted Kremenekusing llvm::APSInt; 42ab2b8c54bca82866876f91e756788916d3fa20c3Ted Kremenek 436190ec29f0895185bbec95a932429b8832917fecZhongxing Xunamespace { 446190ec29f0895185bbec95a932429b8832917fecZhongxing Xu // Trait class for recording returned expression in the state. 456190ec29f0895185bbec95a932429b8832917fecZhongxing Xu struct ReturnExpr { 466190ec29f0895185bbec95a932429b8832917fecZhongxing Xu static int TagInt; 476190ec29f0895185bbec95a932429b8832917fecZhongxing Xu typedef const Stmt *data_type; 486190ec29f0895185bbec95a932429b8832917fecZhongxing Xu }; 496190ec29f0895185bbec95a932429b8832917fecZhongxing Xu int ReturnExpr::TagInt; 506190ec29f0895185bbec95a932429b8832917fecZhongxing Xu} 516190ec29f0895185bbec95a932429b8832917fecZhongxing Xu 52e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 5332c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenek// Utility functions. 5432c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenek//===----------------------------------------------------------------------===// 5532c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenek 5632c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenekstatic inline Selector GetNullarySelector(const char* name, ASTContext& Ctx) { 5732c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenek IdentifierInfo* II = &Ctx.Idents.get(name); 5832c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenek return Ctx.Selectors.getSelector(0, &II); 5932c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenek} 6032c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenek 6132c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenek//===----------------------------------------------------------------------===// 62bdb435ddaafd5069becd543d638112f68825b89dTed Kremenek// Engine construction and deletion. 63bdb435ddaafd5069becd543d638112f68825b89dTed Kremenek//===----------------------------------------------------------------------===// 64bdb435ddaafd5069becd543d638112f68825b89dTed Kremenek 65d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios KyrtzidisExprEngine::ExprEngine(AnalysisManager &mgr, TransferFuncs *tf) 6625e695b2d574d919cc1bbddf3a2efe073d449b1cZhongxing Xu : AMgr(mgr), 67d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis Engine(*this), 68d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis G(Engine.getGraph()), 6950a6d0ce344c02782e0207574005c3b2aaa5077cTed Kremenek Builder(NULL), 70c77a55126fcad66fb086f8e100a494caa2496a2dZhongxing Xu StateMgr(getContext(), mgr.getStoreManagerCreator(), 7132a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek mgr.getConstraintManagerCreator(), G.getAllocator(), 7232a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek *this), 7350a6d0ce344c02782e0207574005c3b2aaa5077cTed Kremenek SymMgr(StateMgr.getSymbolManager()), 74c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder(StateMgr.getSValBuilder()), 750a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek EntryNode(NULL), currentStmt(NULL), 76a5a4166f8cb04490b7b27355874edfb98837cd45Zhongxing Xu NSExceptionII(NULL), NSExceptionInstanceRaiseSelectors(NULL), 77c77a55126fcad66fb086f8e100a494caa2496a2dZhongxing Xu RaiseSel(GetNullarySelector("raise", getContext())), 7832a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek BR(mgr, *this), TF(tf) { 79b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 8032a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek // FIXME: Eventually remove the TF object entirely. 8132a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek TF->RegisterChecks(*this); 8232a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek TF->RegisterPrinters(getStateManager().Printers); 83d767d81290288c030f3be0be1d3e62b9c8df51dcTed Kremenek 84d767d81290288c030f3be0be1d3e62b9c8df51dcTed Kremenek if (mgr.shouldEagerlyTrimExplodedGraph()) { 85d767d81290288c030f3be0be1d3e62b9c8df51dcTed Kremenek // Enable eager node reclaimation when constructing the ExplodedGraph. 86d767d81290288c030f3be0be1d3e62b9c8df51dcTed Kremenek G.enableNodeReclamation(); 87d767d81290288c030f3be0be1d3e62b9c8df51dcTed Kremenek } 88c80135ba857da48173578b9c528fce6777e18168Ted Kremenek} 8950a6d0ce344c02782e0207574005c3b2aaa5077cTed Kremenek 90d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios KyrtzidisExprEngine::~ExprEngine() { 91cf118d41f7930a18dce97416ef7834a62642f587Ted Kremenek BR.FlushReports(); 92e448ab4f9dd162802f5d7cfea60f7830cc61c654Ted Kremenek delete [] NSExceptionInstanceRaiseSelectors; 9350a6d0ce344c02782e0207574005c3b2aaa5077cTed Kremenek} 9450a6d0ce344c02782e0207574005c3b2aaa5077cTed Kremenek 95e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 96e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Utility methods. 97e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 98e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 99d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisconst GRState* ExprEngine::getInitialState(const LocationContext *InitLoc) { 10017fd8632dcda97022a51effc24060eacdad9dbe0Zhongxing Xu const GRState *state = StateMgr.getInitialState(InitLoc); 1011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 102cfcd7fd0de701c5ce05e96de1ed2d0bf8c7035d9Ted Kremenek // Preconditions. 103cfcd7fd0de701c5ce05e96de1ed2d0bf8c7035d9Ted Kremenek 10452e5602056e4cade24cbcca57767e94e1d430b03Ted Kremenek // FIXME: It would be nice if we had a more general mechanism to add 10552e5602056e4cade24cbcca57767e94e1d430b03Ted Kremenek // such preconditions. Some day. 1065974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek do { 107b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek const Decl *D = InitLoc->getDecl(); 1085974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 1095974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek // Precondition: the first argument of 'main' is an integer guaranteed 1105974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek // to be > 0. 1115974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek const IdentifierInfo *II = FD->getIdentifier(); 1125974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek if (!II || !(II->getName() == "main" && FD->getNumParams() > 0)) 1135974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek break; 1145974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek 1155974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek const ParmVarDecl *PD = FD->getParamDecl(0); 1165974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek QualType T = PD->getType(); 1175974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek if (!T->isIntegerType()) 1185974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek break; 119b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1205974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek const MemRegion *R = state->getRegion(PD, InitLoc); 1215974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek if (!R) 1225974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek break; 123b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1241397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getSVal(loc::MemRegionVal(R)); 1259c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek SVal Constraint_untested = evalBinOp(state, BO_GT, V, 126c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.makeZeroVal(T), 1275974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek getContext().IntTy); 1285974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek 1295974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek DefinedOrUnknownSVal *Constraint = 1305974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek dyn_cast<DefinedOrUnknownSVal>(&Constraint_untested); 131b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1325974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek if (!Constraint) 1335974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek break; 134b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 13528f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *newState = state->assume(*Constraint, true)) 1365974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek state = newState; 137b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1385974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek break; 13952e5602056e4cade24cbcca57767e94e1d430b03Ted Kremenek } 1405974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek 141b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) { 1425974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek // Precondition: 'self' is always non-null upon entry to an Objective-C 1435974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek // method. 1445974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek const ImplicitParamDecl *SelfD = MD->getSelfDecl(); 1455974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek const MemRegion *R = state->getRegion(SelfD, InitLoc); 1461397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getSVal(loc::MemRegionVal(R)); 147b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1485974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek if (const Loc *LV = dyn_cast<Loc>(&V)) { 1495974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek // Assume that the pointer value in 'self' is non-null. 15028f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek state = state->assume(*LV, true); 1515974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek assert(state && "'self' cannot be null"); 1525974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek } 153cfcd7fd0de701c5ce05e96de1ed2d0bf8c7035d9Ted Kremenek } 1545974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek } while (0); 155b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 15652e5602056e4cade24cbcca57767e94e1d430b03Ted Kremenek return state; 157e070a1df66aab6d4168fb28f7559fdf996df3567Ted Kremenek} 158e070a1df66aab6d4168fb28f7559fdf996df3567Ted Kremenek 159e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 160e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Top-level transfer function logic (Dispatcher). 161e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 162e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 1639c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek/// evalAssume - Called by ConstraintManager. Used to call checker-specific 16432a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek/// logic for handling assumptions on symbolic values. 165e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekconst GRState *ExprEngine::processAssume(const GRState *state, SVal cond, 166b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek bool assumption) { 167312dbec867f6b8d6b86fd562c53352cd4db27468Argyrios Kyrtzidis state = getCheckerManager().runCheckersForEvalAssume(state, cond, assumption); 168312dbec867f6b8d6b86fd562c53352cd4db27468Argyrios Kyrtzidis 16972905cfa81cfd126f322c4173f56d332aac5539eJordy Rose // If the state is infeasible at this point, bail out. 17032a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek if (!state) 17132a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek return NULL; 172b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1739c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek return TF->evalAssume(state, cond, assumption); 17432a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek} 17532a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek 176e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekbool ExprEngine::wantsRegionChangeUpdate(const GRState* state) { 177183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis return getCheckerManager().wantsRegionChangeUpdate(state); 178c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose} 179c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose 180c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Roseconst GRState * 181e36de1fe51c39d9161915dd3dbef880954af6476Ted KremenekExprEngine::processRegionChanges(const GRState *state, 182c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose const MemRegion * const *Begin, 183c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose const MemRegion * const *End) { 184183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis return getCheckerManager().runCheckersForRegionChanges(state, Begin, End); 185c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose} 186c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose 187e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processEndWorklist(bool hasWorkRemaining) { 18830726c6baee1417307236e854f1474fdb3cedb98Argyrios Kyrtzidis getCheckerManager().runCheckersForEndAnalysis(G, BR, *this); 189ccc263b44c62ce3a02f797a3ddb3d6017cf0e5e4Ted Kremenek} 190ccc263b44c62ce3a02f797a3ddb3d6017cf0e5e4Ted Kremenek 191e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processCFGElement(const CFGElement E, 192d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder& builder) { 1939c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu switch (E.getKind()) { 1943c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::Invalid: 1953c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek llvm_unreachable("Unexpected CFGElement kind."); 1963c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::Statement: 1973c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek ProcessStmt(E.getAs<CFGStmt>()->getStmt(), builder); 1983c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek return; 1993c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::Initializer: 2003c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek ProcessInitializer(E.getAs<CFGInitializer>()->getInitializer(), builder); 2013c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek return; 2023c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::AutomaticObjectDtor: 2033c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::BaseDtor: 2043c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::MemberDtor: 2053c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::TemporaryDtor: 2063c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek ProcessImplicitDtor(*E.getAs<CFGImplicitDtor>(), builder); 2073c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek return; 2089c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu } 2099c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu} 2109c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu 211d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessStmt(const CFGStmt S, StmtNodeBuilder& builder) { 212d767d81290288c030f3be0be1d3e62b9c8df51dcTed Kremenek // Reclaim any unnecessary nodes in the ExplodedGraph. 213d767d81290288c030f3be0be1d3e62b9c8df51dcTed Kremenek G.reclaimRecentlyAllocatedNodes(); 214e3115e257163321ecde429aeae75f1702f099d4cTed Kremenek // Recycle any unused states in the GRStateManager. 215e3115e257163321ecde429aeae75f1702f099d4cTed Kremenek StateMgr.recycleUnusedStates(); 216e3115e257163321ecde429aeae75f1702f099d4cTed Kremenek 2170a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek currentStmt = S.getStmt(); 2180bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek PrettyStackTraceLoc CrashInfo(getContext().getSourceManager(), 2190a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek currentStmt->getLocStart(), 2200bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek "Error evaluating statement"); 2211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 222e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek Builder = &builder; 223b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek EntryNode = builder.getPredecessor(); 2241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Create the cleaned state. 226bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose const LocationContext *LC = EntryNode->getLocationContext(); 2270a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek SymbolReaper SymReaper(LC, currentStmt, SymMgr); 228c179a7fbb294fe3ff6cf5479f6239a10f39628c7Zhongxing Xu 229bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose if (AMgr.shouldPurgeDead()) { 230bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose const GRState *St = EntryNode->getState(); 231183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis getCheckerManager().runCheckersForLiveSymbols(St, SymReaper); 232183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis 233bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose const StackFrameContext *SFC = LC->getCurrentStackFrame(); 234db0594bfc013131f88429add4eb653c285fa94fbTed Kremenek CleanedState = StateMgr.removeDeadBindings(St, SFC, SymReaper); 235bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose } else { 236bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose CleanedState = EntryNode->getState(); 237bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose } 238241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek 23977d7ef8d8a80ccb2ab3d25c80810571e3ab14ee4Ted Kremenek // Process any special transfer function for dead symbols. 240031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 242241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek if (!SymReaper.hasDeadSymbols()) 243846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek Tmp.Add(EntryNode); 24477d7ef8d8a80ccb2ab3d25c80810571e3ab14ee4Ted Kremenek else { 24577d7ef8d8a80ccb2ab3d25c80810571e3ab14ee4Ted Kremenek SaveAndRestore<bool> OldSink(Builder->BuildSinks); 246b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek SaveOr OldHasGen(Builder->hasGeneratedNode); 247846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek 248331b0ac44b9eb0ffcba66b4f3f3f9adb27c2434fTed Kremenek SaveAndRestore<bool> OldPurgeDeadSymbols(Builder->PurgingDeadSymbols); 249331b0ac44b9eb0ffcba66b4f3f3f9adb27c2434fTed Kremenek Builder->PurgingDeadSymbols = true; 2501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2519400613b54bf56c317786d778f58f45f1080d619Zhongxing Xu // FIXME: This should soon be removed. 2529400613b54bf56c317786d778f58f45f1080d619Zhongxing Xu ExplodedNodeSet Tmp2; 2539c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek getTF().evalDeadSymbols(Tmp2, *this, *Builder, EntryNode, 254241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek CleanedState, SymReaper); 255846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek 256eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForDeadSymbols(Tmp, Tmp2, 257183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis SymReaper, currentStmt, *this); 258183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis 259b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek if (!Builder->BuildSinks && !Builder->hasGeneratedNode) 260846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek Tmp.Add(EntryNode); 26177d7ef8d8a80ccb2ab3d25c80810571e3ab14ee4Ted Kremenek } 2621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 263846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek bool HasAutoGenerated = false; 264846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek 265031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 266031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Dst; 2671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Set the cleaned state. 269846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek Builder->SetCleanedState(*I == EntryNode ? CleanedState : GetState(*I)); 2701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Visit the statement. 2720a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek Visit(currentStmt, *I, Dst); 273846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek 274846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek // Do we need to auto-generate a node? We only need to do this to generate 275d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis // a node with a "cleaned" state; CoreEngine will actually handle 2761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // auto-transitions for other cases. 277846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek if (Dst.size() == 1 && *Dst.begin() == EntryNode 278b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek && !Builder->hasGeneratedNode && !HasAutoGenerated) { 279846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek HasAutoGenerated = true; 2800a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek builder.generateNode(currentStmt, GetState(EntryNode), *I); 281846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek } 28277d7ef8d8a80ccb2ab3d25c80810571e3ab14ee4Ted Kremenek } 2831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 284e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // NULL out these variables to cleanup. 285846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek CleanedState = NULL; 286846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek EntryNode = NULL; 287df7533b5e523a3def04b5c33b56361a94dd97d35Ted Kremenek 2880a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek currentStmt = 0; 2891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 290e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek Builder = NULL; 291e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek} 292e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 293d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessInitializer(const CFGInitializer Init, 294d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 2950a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek // We don't set EntryNode and currentStmt. And we don't clean up state. 296cbb67480094b3bcb5b715acd827cbad55e2a204cSean Hunt const CXXCtorInitializer *BMI = Init.getInitializer(); 2979dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 298d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu ExplodedNode *pred = builder.getPredecessor(); 299d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu 300d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu const StackFrameContext *stackFrame = cast<StackFrameContext>(pred->getLocationContext()); 301d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu const CXXConstructorDecl *decl = cast<CXXConstructorDecl>(stackFrame->getDecl()); 302d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu const CXXThisRegion *thisReg = getCXXThisRegion(decl, stackFrame); 303d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu 304d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu SVal thisVal = pred->getState()->getSVal(thisReg); 3059dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 30600eb3f9c5b33e3d99aee1f8b75dd9c9678fdd66bFrancois Pichet if (BMI->isAnyMemberInitializer()) { 3079dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu ExplodedNodeSet Dst; 3089dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 3099dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu // Evaluate the initializer. 310d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu Visit(BMI->getInit(), pred, Dst); 3119dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 3129dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu for (ExplodedNodeSet::iterator I = Dst.begin(), E = Dst.end(); I != E; ++I){ 3139dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu ExplodedNode *Pred = *I; 3149dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu const GRState *state = Pred->getState(); 3159dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 31600eb3f9c5b33e3d99aee1f8b75dd9c9678fdd66bFrancois Pichet const FieldDecl *FD = BMI->getAnyMember(); 3179dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 318d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu SVal FieldLoc = state->getLValue(FD, thisVal); 3199dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu SVal InitVal = state->getSVal(BMI->getInit()); 3209dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu state = state->bindLoc(FieldLoc, InitVal); 3219dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 3229dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu // Use a custom node building process. 323d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu PostInitializer PP(BMI, stackFrame); 3249dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu // Builder automatically add the generated node to the deferred set, 3259dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu // which are processed in the builder's dtor. 3269dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu builder.generateNode(PP, state, Pred); 3279dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu } 328d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu return; 3299dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu } 330d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu 331d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu assert(BMI->isBaseInitializer()); 332d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu 333d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu // Get the base class declaration. 334d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu const CXXConstructExpr *ctorExpr = cast<CXXConstructExpr>(BMI->getInit()); 335d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu 336d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu // Create the base object region. 337d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu SVal baseVal = 338d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu getStoreManager().evalDerivedToBase(thisVal, ctorExpr->getType()); 339d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu const MemRegion *baseReg = baseVal.getAsRegion(); 340d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu assert(baseReg); 341d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu Builder = &builder; 342d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu ExplodedNodeSet dst; 343d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu VisitCXXConstructExpr(ctorExpr, baseReg, pred, dst); 3449c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu} 3459c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu 346d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessImplicitDtor(const CFGImplicitDtor D, 347d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 348b13453bd8a91f331d0910ca95ad52aa41b52f648Zhongxing Xu Builder = &builder; 349b13453bd8a91f331d0910ca95ad52aa41b52f648Zhongxing Xu 3503c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek switch (D.getKind()) { 3514ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu case CFGElement::AutomaticObjectDtor: 3524ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu ProcessAutomaticObjDtor(cast<CFGAutomaticObjDtor>(D), builder); 3534ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu break; 3544ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu case CFGElement::BaseDtor: 3554ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu ProcessBaseDtor(cast<CFGBaseDtor>(D), builder); 3564ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu break; 3574ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu case CFGElement::MemberDtor: 3584ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu ProcessMemberDtor(cast<CFGMemberDtor>(D), builder); 3594ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu break; 3604ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu case CFGElement::TemporaryDtor: 3614ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu ProcessTemporaryDtor(cast<CFGTemporaryDtor>(D), builder); 3624ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu break; 3634ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu default: 3644ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu llvm_unreachable("Unexpected dtor kind."); 3654ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu } 3664ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu} 3674ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu 368d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessAutomaticObjDtor(const CFGAutomaticObjDtor dtor, 369d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 370b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek ExplodedNode *pred = builder.getPredecessor(); 3712210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu const GRState *state = pred->getState(); 3722210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu const VarDecl *varDecl = dtor.getVarDecl(); 3732210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu 3742210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu QualType varType = varDecl->getType(); 3752210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu 3762210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu if (const ReferenceType *refType = varType->getAs<ReferenceType>()) 3772210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu varType = refType->getPointeeType(); 3782210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu 3792210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu const CXXRecordDecl *recordDecl = varType->getAsCXXRecordDecl(); 3802210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu assert(recordDecl && "get CXXRecordDecl fail"); 3812210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu const CXXDestructorDecl *dtorDecl = recordDecl->getDestructor(); 382b13453bd8a91f331d0910ca95ad52aa41b52f648Zhongxing Xu 3832210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu Loc dest = state->getLValue(varDecl, pred->getLocationContext()); 384b13453bd8a91f331d0910ca95ad52aa41b52f648Zhongxing Xu 3852210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu ExplodedNodeSet dstSet; 3862210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu VisitCXXDestructor(dtorDecl, cast<loc::MemRegionVal>(dest).getRegion(), 3872210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu dtor.getTriggerStmt(), pred, dstSet); 3884ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu} 3894ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu 390d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessBaseDtor(const CFGBaseDtor D, 391d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 3924ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu} 3934ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu 394d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessMemberDtor(const CFGMemberDtor D, 395d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 3964ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu} 3974ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu 398d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessTemporaryDtor(const CFGTemporaryDtor D, 399d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 4009c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu} 4019c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu 402d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::Visit(const Stmt* S, ExplodedNode* Pred, 40303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ExplodedNodeSet& Dst) { 4040bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek PrettyStackTraceLoc CrashInfo(getContext().getSourceManager(), 4050bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek S->getLocStart(), 4060bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek "Error evaluating statement"); 4070bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek 408f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall // Expressions to ignore. 409f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall if (const Expr *Ex = dyn_cast<Expr>(S)) 410892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek S = Ex->IgnoreParens(); 411f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall 412e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // FIXME: add metadata to the CFG so that we can disable 413e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // this check when we KNOW that there is no block-level subexpression. 414e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // The motivation is that this check requires a hashtable lookup. 4151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4160a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek if (S != currentStmt && Pred->getLocationContext()->getCFG()->isBlkExpr(S)) { 417e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek Dst.Add(Pred); 418e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek return; 419e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 4201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 421e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek switch (S->getStmtClass()) { 422c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek // C++ stuff we don't support yet. 4231b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXBindTemporaryExprClass: 4241b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXCatchStmtClass: 4251b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXDependentScopeMemberExprClass: 4261b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXNullPtrLiteralExprClass: 4271b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXPseudoDestructorExprClass: 428c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek case Stmt::CXXTemporaryObjectExprClass: 4291b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXThrowExprClass: 4301b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXTryStmtClass: 4311b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXTypeidExprClass: 4329be88403e965cc49af76c9d33d818781d44b333eFrancois Pichet case Stmt::CXXUuidofExprClass: 433c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek case Stmt::CXXUnresolvedConstructExprClass: 434ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor case Stmt::CXXScalarValueInitExprClass: 4351b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::DependentScopeDeclRefExprClass: 4361b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::UnaryTypeTraitExprClass: 4376ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet case Stmt::BinaryTypeTraitExprClass: 4381b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::UnresolvedLookupExprClass: 439c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek case Stmt::UnresolvedMemberExprClass: 4406b219d082434394c1ac401390ec1d1967727815aSebastian Redl case Stmt::CXXNoexceptExprClass: 441be230c36e32142cbdcdbe9c97511d097beeecbabDouglas Gregor case Stmt::PackExpansionExprClass: 442c7793c73ba8a343de3f2552d984851985a46f159Douglas Gregor case Stmt::SubstNonTypeTemplateParmPackExprClass: 4431b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek { 444c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek SaveAndRestore<bool> OldSink(Builder->BuildSinks); 445c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek Builder->BuildSinks = true; 446422ab7a49a9a4252dbc6350e49d7a5708337b9c7Ted Kremenek const ExplodedNode *node = MakeNode(Dst, S, Pred, GetState(Pred)); 447422ab7a49a9a4252dbc6350e49d7a5708337b9c7Ted Kremenek Engine.addAbortedBlock(node, Builder->getBlock()); 448c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek break; 449c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek } 4505fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek 4515fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek // We don't handle default arguments either yet, but we can fake it 4525fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek // for now by just skipping them. 4535fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek case Stmt::CXXDefaultArgExprClass: { 4545fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek Dst.Add(Pred); 4555fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek break; 4565fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek } 4575fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek 458f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall case Stmt::ParenExprClass: 459f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall llvm_unreachable("ParenExprs already handled."); 4601b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // Cases that should never be evaluated simply because they shouldn't 4611b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // appear in the CFG. 4621b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::BreakStmtClass: 4631b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CaseStmtClass: 4641b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CompoundStmtClass: 4651b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ContinueStmtClass: 4661b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::DefaultStmtClass: 4671b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::DoStmtClass: 468d40066b0fb883839a9100e5455e33190b9b8abacTed Kremenek case Stmt::ForStmtClass: 4691b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::GotoStmtClass: 470d40066b0fb883839a9100e5455e33190b9b8abacTed Kremenek case Stmt::IfStmtClass: 4711b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::IndirectGotoStmtClass: 4721b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::LabelStmtClass: 4731b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::NoStmtClass: 4741b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::NullStmtClass: 475d40066b0fb883839a9100e5455e33190b9b8abacTed Kremenek case Stmt::SwitchStmtClass: 476d40066b0fb883839a9100e5455e33190b9b8abacTed Kremenek case Stmt::WhileStmtClass: 4771b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek llvm_unreachable("Stmt should not be in analyzer evaluation loop"); 4781b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek break; 4791b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek 4808ad9cbc518a603176462f1fa1efe389023590082Ted Kremenek case Stmt::GNUNullExprClass: { 481c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek MakeNode(Dst, S, Pred, GetState(Pred)->BindExpr(S, svalBuilder.makeNull())); 4828ad9cbc518a603176462f1fa1efe389023590082Ted Kremenek break; 4838ad9cbc518a603176462f1fa1efe389023590082Ted Kremenek } 4848ad9cbc518a603176462f1fa1efe389023590082Ted Kremenek 4854beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek case Stmt::ObjCAtSynchronizedStmtClass: 4864beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek VisitObjCAtSynchronizedStmt(cast<ObjCAtSynchronizedStmt>(S), Pred, Dst); 4874beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek break; 4884beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 48914429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis case Stmt::ObjCPropertyRefExprClass: 49014429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis VisitObjCPropertyRefExpr(cast<ObjCPropertyRefExpr>(S), Pred, Dst); 49114429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis break; 49214429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 4931b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // Cases not handled yet; but will handle some day. 4941b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::DesignatedInitExprClass: 4951b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ExtVectorElementExprClass: 4961b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ImaginaryLiteralClass: 4971b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ImplicitValueInitExprClass: 4981b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCAtCatchStmtClass: 4991b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCAtFinallyStmtClass: 5001b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCAtTryStmtClass: 5011b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCEncodeExprClass: 5021b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCIsaExprClass: 5031b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCProtocolExprClass: 5041b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCSelectorExprClass: 5051b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCStringLiteralClass: 5061b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ParenListExprClass: 5071b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::PredefinedExprClass: 5081b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ShuffleVectorExprClass: 5091b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::VAArgExprClass: 510e08ce650a2b02410eddd1f60a4aa6b3d4be71e73Peter Collingbourne case Stmt::CUDAKernelCallExprClass: 51156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall case Stmt::OpaqueValueExprClass: 5121b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // Fall through. 5131b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek 5141b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // Cases we intentionally don't evaluate, since they don't need 5151b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // to be explicitly evaluated. 516bc9ad74a13e83303a3a5251f8bacbbca17341c17Zhongxing Xu case Stmt::AddrLabelExprClass: 517bc9ad74a13e83303a3a5251f8bacbbca17341c17Zhongxing Xu case Stmt::IntegerLiteralClass: 518bc9ad74a13e83303a3a5251f8bacbbca17341c17Zhongxing Xu case Stmt::CharacterLiteralClass: 519477323d58a0de352c6a61e08b5a83127c4adc904Zhongxing Xu case Stmt::CXXBoolLiteralExprClass: 52046fc3fae1cf1926a3b8138bca4adeda37c41f92cTed Kremenek case Stmt::ExprWithCleanupsClass: 521bc9ad74a13e83303a3a5251f8bacbbca17341c17Zhongxing Xu case Stmt::FloatingLiteralClass: 522f901a7de97f46ba2b1ff153f9fb83d00dc37cfcfDouglas Gregor case Stmt::SizeOfPackExprClass: 523e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek Dst.Add(Pred); // No-op. Simply propagate the current state unchanged. 524e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 5251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 526540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek case Stmt::ArraySubscriptExprClass: 527892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitLvalArraySubscriptExpr(cast<ArraySubscriptExpr>(S), Pred, Dst); 528540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek break; 5291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 530e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::AsmStmtClass: 531e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek VisitAsmStmt(cast<AsmStmt>(S), Pred, Dst); 532e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 533b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 534892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek case Stmt::BlockDeclRefExprClass: { 535892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const BlockDeclRefExpr *BE = cast<BlockDeclRefExpr>(S); 536892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitCommonDeclRefExpr(BE, BE->getDecl(), Pred, Dst); 53767d1287035767f4f6c8ca0c2bb755990012a44caTed Kremenek break; 538892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 5391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 540c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek case Stmt::BlockExprClass: 541c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek VisitBlockExpr(cast<BlockExpr>(S), Pred, Dst); 542c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek break; 543c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek 544e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::BinaryOperatorClass: { 54503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const BinaryOperator* B = cast<BinaryOperator>(S); 546e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek if (B->isLogicalOp()) { 547e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek VisitLogicalExpr(B, Pred, Dst); 548e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 549e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 5502de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall else if (B->getOpcode() == BO_Comma) { 551a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(Pred); 5521397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek MakeNode(Dst, B, Pred, state->BindExpr(B, state->getSVal(B->getRHS()))); 553e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 554e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 55506fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 556b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek if (AMgr.shouldEagerlyAssume() && 557bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu (B->isRelationalOp() || B->isEqualityOp())) { 558031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 559892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitBinaryOperator(cast<BinaryOperator>(S), Pred, Tmp); 5609c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalEagerlyAssume(Dst, Tmp, cast<Expr>(S)); 56148af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 56248af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek else 563892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitBinaryOperator(cast<BinaryOperator>(S), Pred, Dst); 56448af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek 565e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 566e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 56706fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 568b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CallExprClass: 569b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CXXOperatorCallExprClass: 570b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CXXMemberCallExprClass: { 571b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek VisitCallExpr(cast<CallExpr>(S), Pred, Dst); 57206fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek break; 573e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 57406fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 5757ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu case Stmt::CXXConstructExprClass: { 5767ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu const CXXConstructExpr *C = cast<CXXConstructExpr>(S); 5777ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu // For block-level CXXConstructExpr, we don't have a destination region. 5787ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu // Let VisitCXXConstructExpr() create one. 579892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitCXXConstructExpr(C, 0, Pred, Dst); 5807ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu break; 5817ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu } 5827ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu 583856c6bcaea56e05255e9f3997ddd56b5c18a14f0Zhongxing Xu case Stmt::CXXNewExprClass: { 58403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const CXXNewExpr *NE = cast<CXXNewExpr>(S); 585856c6bcaea56e05255e9f3997ddd56b5c18a14f0Zhongxing Xu VisitCXXNewExpr(NE, Pred, Dst); 586856c6bcaea56e05255e9f3997ddd56b5c18a14f0Zhongxing Xu break; 587856c6bcaea56e05255e9f3997ddd56b5c18a14f0Zhongxing Xu } 588856c6bcaea56e05255e9f3997ddd56b5c18a14f0Zhongxing Xu 5896b8513829895e56a7b97e787ea74520bc626512eZhongxing Xu case Stmt::CXXDeleteExprClass: { 59003509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const CXXDeleteExpr *CDE = cast<CXXDeleteExpr>(S); 5916b8513829895e56a7b97e787ea74520bc626512eZhongxing Xu VisitCXXDeleteExpr(CDE, Pred, Dst); 5926b8513829895e56a7b97e787ea74520bc626512eZhongxing Xu break; 5936b8513829895e56a7b97e787ea74520bc626512eZhongxing Xu } 594e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // FIXME: ChooseExpr is really a constant. We need to fix 595e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // the CFG do not model them as explicit control-flow. 5961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 597e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::ChooseExprClass: { // __builtin_choose_expr 59803509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const ChooseExpr* C = cast<ChooseExpr>(S); 599e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek VisitGuardedExpr(C, C->getLHS(), C->getRHS(), Pred, Dst); 600e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 601e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 6021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 603e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::CompoundAssignOperatorClass: 604892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitBinaryOperator(cast<BinaryOperator>(S), Pred, Dst); 605e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 606f22679e3e5d5f5754931952e58112b4c863a4137Zhongxing Xu 607f22679e3e5d5f5754931952e58112b4c863a4137Zhongxing Xu case Stmt::CompoundLiteralExprClass: 608892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitCompoundLiteralExpr(cast<CompoundLiteralExpr>(S), Pred, Dst); 609f22679e3e5d5f5754931952e58112b4c863a4137Zhongxing Xu break; 6101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 61156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall case Stmt::BinaryConditionalOperatorClass: 612e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::ConditionalOperatorClass: { // '?' operator 61356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall const AbstractConditionalOperator *C 61456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall = cast<AbstractConditionalOperator>(S); 61556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall VisitGuardedExpr(C, C->getTrueExpr(), C->getFalseExpr(), Pred, Dst); 616e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 617e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 6181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 619bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu case Stmt::CXXThisExprClass: 620bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu VisitCXXThisExpr(cast<CXXThisExpr>(S), Pred, Dst); 621bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu break; 622bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu 623892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek case Stmt::DeclRefExprClass: { 624892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const DeclRefExpr *DE = cast<DeclRefExpr>(S); 625892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitCommonDeclRefExpr(DE, DE->getDecl(), Pred, Dst); 626e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 627892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 6281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 629e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::DeclStmtClass: 630e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek VisitDeclStmt(cast<DeclStmt>(S), Pred, Dst); 631e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 6321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6330835a3cdeefe714b4959d31127ea155e56393125Argyrios Kyrtzidis case Stmt::ImplicitCastExprClass: 6340d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CStyleCastExprClass: 6350d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CXXStaticCastExprClass: 6360d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CXXDynamicCastExprClass: 6370d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CXXReinterpretCastExprClass: 6380d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CXXConstCastExprClass: 6390d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CXXFunctionalCastExprClass: { 64003509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const CastExpr* C = cast<CastExpr>(S); 641892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitCast(C, C->getSubExpr(), Pred, Dst); 642e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 643e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 644b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 645c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu case Stmt::InitListExprClass: 646c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu VisitInitListExpr(cast<InitListExpr>(S), Pred, Dst); 647c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu break; 6481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 64997ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek case Stmt::MemberExprClass: 650892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitMemberExpr(cast<MemberExpr>(S), Pred, Dst); 651469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek break; 65297ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek case Stmt::ObjCIvarRefExprClass: 653892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitLvalObjCIvarRefExpr(cast<ObjCIvarRefExpr>(S), Pred, Dst); 65497ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek break; 655af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek 656af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek case Stmt::ObjCForCollectionStmtClass: 657af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek VisitObjCForCollectionStmt(cast<ObjCForCollectionStmt>(S), Pred, Dst); 658af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek break; 6591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 66038ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek case Stmt::ObjCMessageExprClass: 661892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitObjCMessageExpr(cast<ObjCMessageExpr>(S), Pred, Dst); 662e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 6631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 664bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek case Stmt::ObjCAtThrowStmtClass: { 665bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek // FIXME: This is not complete. We basically treat @throw as 666bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek // an abort. 667bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek SaveAndRestore<bool> OldSink(Builder->BuildSinks); 668bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek Builder->BuildSinks = true; 669bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek MakeNode(Dst, S, Pred, GetState(Pred)); 670bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek break; 671bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek } 6721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6731b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek case Stmt::ReturnStmtClass: 6741b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek VisitReturnStmt(cast<ReturnStmt>(S), Pred, Dst); 6751b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek break; 6761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6778ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case Stmt::OffsetOfExprClass: 6788ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor VisitOffsetOfExpr(cast<OffsetOfExpr>(S), Pred, Dst); 6798ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 6808ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 681f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne case Stmt::UnaryExprOrTypeTraitExprClass: 682f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne VisitUnaryExprOrTypeTraitExpr(cast<UnaryExprOrTypeTraitExpr>(S), 683f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne Pred, Dst); 684e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 6851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 686e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::StmtExprClass: { 68703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const StmtExpr* SE = cast<StmtExpr>(S); 688a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek 689a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek if (SE->getSubStmt()->body_empty()) { 690a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek // Empty statement expression. 691a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek assert(SE->getType() == getContext().VoidTy 692a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek && "Empty statement expression must have void type."); 693a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek Dst.Add(Pred); 694a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek break; 695a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek } 6961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 697a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek if (Expr* LastExpr = dyn_cast<Expr>(*SE->getSubStmt()->body_rbegin())) { 698a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek const GRState* state = GetState(Pred); 6991397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek MakeNode(Dst, SE, Pred, state->BindExpr(SE, state->getSVal(LastExpr))); 700a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek } 701e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek else 702e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek Dst.Add(Pred); 7031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 704e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 705e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 7066987c7b74146b9658b1925c5981f8b0cd0672b55Zhongxing Xu 707892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek case Stmt::StringLiteralClass: { 708892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const GRState* state = GetState(Pred); 709892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal V = state->getLValue(cast<StringLiteral>(S)); 710892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek MakeNode(Dst, S, Pred, state->BindExpr(S, V)); 711892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek return; 712892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 713b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 71472374594c5d9ade02451bc85cf9dfa5b0ea106e7Ted Kremenek case Stmt::UnaryOperatorClass: { 71503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const UnaryOperator *U = cast<UnaryOperator>(S); 7162de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (AMgr.shouldEagerlyAssume()&&(U->getOpcode() == UO_LNot)) { 717031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 718892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitUnaryOperator(U, Pred, Tmp); 7199c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalEagerlyAssume(Dst, Tmp, U); 72072374594c5d9ade02451bc85cf9dfa5b0ea106e7Ted Kremenek } 72172374594c5d9ade02451bc85cf9dfa5b0ea106e7Ted Kremenek else 722892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitUnaryOperator(U, Pred, Dst); 7231b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek break; 72472374594c5d9ade02451bc85cf9dfa5b0ea106e7Ted Kremenek } 7251b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 7261b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek} 7271b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 728e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 729e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Block entrance. (Update counters). 730e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 731e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 73227c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenekvoid ExprEngine::processCFGBlockEntrance(ExplodedNodeSet &dstNodes, 73327c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek GenericNodeBuilder<BlockEntrance> &nodeBuilder){ 73427c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek 73527c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek // FIXME: Refactor this into a checker. 73627c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek const CFGBlock *block = nodeBuilder.getProgramPoint().getBlock(); 73727c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek ExplodedNode *pred = nodeBuilder.getPredecessor(); 73827c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek 73927c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek if (nodeBuilder.getBlockCounter().getNumVisited( 74027c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek pred->getLocationContext()->getCurrentStackFrame(), 74127c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek block->getBlockID()) >= AMgr.getMaxVisit()) { 74227c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek 74327c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek static int tag = 0; 744b6a2b08a6b3fbce1a6a4b69d4185165de970696cTed Kremenek nodeBuilder.generateNode(pred->getState(), pred, &tag, true); 74527c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek } 746e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek} 747e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 748e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 7491670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek// Generic node creation. 7501670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek//===----------------------------------------------------------------------===// 7511670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek 752d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios KyrtzidisExplodedNode* ExprEngine::MakeNode(ExplodedNodeSet& Dst, const Stmt* S, 753031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode* Pred, const GRState* St, 754031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ProgramPoint::Kind K, const void *tag) { 755d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis assert (Builder && "StmtNodeBuilder not present."); 7561670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek SaveAndRestore<const void*> OldTag(Builder->Tag); 7571670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek Builder->Tag = tag; 7581670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek return Builder->MakeNode(Dst, S, Pred, St, K); 7591670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek} 7601670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek 7611670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek//===----------------------------------------------------------------------===// 762e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Branch processing. 763e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 764e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 765d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisconst GRState* ExprEngine::MarkBranch(const GRState* state, 76603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Stmt* Terminator, 76703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu bool branchTaken) { 7681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 76905a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek switch (Terminator->getStmtClass()) { 77005a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek default: 771a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek return state; 7721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 77305a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek case Stmt::BinaryOperatorClass: { // '&&' and '||' 7741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 77503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const BinaryOperator* B = cast<BinaryOperator>(Terminator); 77605a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek BinaryOperator::Opcode Op = B->getOpcode(); 7771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7782de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert (Op == BO_LAnd || Op == BO_LOr); 7791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 78005a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // For &&, if we take the true branch, then the value of the whole 78105a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // expression is that of the RHS expression. 78205a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // 78305a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // For ||, if we take the false branch, then the value of the whole 78405a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // expression is that of the RHS expression. 7851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7862de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall const Expr* Ex = (Op == BO_LAnd && branchTaken) || 7872de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall (Op == BO_LOr && !branchTaken) 78803509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ? B->getRHS() : B->getLHS(); 7891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7908e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek return state->BindExpr(B, UndefinedVal(Ex)); 79105a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek } 7921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 79356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall case Stmt::BinaryConditionalOperatorClass: 79405a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek case Stmt::ConditionalOperatorClass: { // ?: 79556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall const AbstractConditionalOperator* C 79656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall = cast<AbstractConditionalOperator>(Terminator); 7971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 79805a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // For ?, if branchTaken == true then the value is either the LHS or 79905a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // the condition itself. (GNU extension). 8001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 80103509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex; 8021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 80305a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek if (branchTaken) 80456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall Ex = C->getTrueExpr(); 80505a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek else 80656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall Ex = C->getFalseExpr(); 8071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8088e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek return state->BindExpr(C, UndefinedVal(Ex)); 80905a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek } 8101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 81105a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek case Stmt::ChooseExprClass: { // ?: 8121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 81303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const ChooseExpr* C = cast<ChooseExpr>(Terminator); 8141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 81503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = branchTaken ? C->getLHS() : C->getRHS(); 8168e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek return state->BindExpr(C, UndefinedVal(Ex)); 81705a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek } 81805a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek } 81905a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek} 82005a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek 8216ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek/// RecoverCastedSymbol - A helper function for ProcessBranch that is used 8226ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek/// to try to recover some path-sensitivity for casts of symbolic 8236ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek/// integers that promote their values (which are currently not tracked well). 8246ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek/// This function returns the SVal bound to Condition->IgnoreCasts if all the 8256ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek// cast(s) did was sign-extend the original value. 8266ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenekstatic SVal RecoverCastedSymbol(GRStateManager& StateMgr, const GRState* state, 82703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Stmt* Condition, ASTContext& Ctx) { 8286ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 82903509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr *Ex = dyn_cast<Expr>(Condition); 8306ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek if (!Ex) 8316ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek return UnknownVal(); 8326ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 8336ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek uint64_t bits = 0; 8346ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek bool bitsInit = false; 8351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 83603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu while (const CastExpr *CE = dyn_cast<CastExpr>(Ex)) { 8376ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek QualType T = CE->getType(); 8386ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 8396ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek if (!T->isIntegerType()) 8406ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek return UnknownVal(); 8411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8426ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek uint64_t newBits = Ctx.getTypeSize(T); 8436ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek if (!bitsInit || newBits < bits) { 8446ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek bitsInit = true; 8456ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek bits = newBits; 8466ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek } 8471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8486ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek Ex = CE->getSubExpr(); 8496ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek } 8506ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 8516ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek // We reached a non-cast. Is it a symbolic value? 8526ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek QualType T = Ex->getType(); 8536ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 8546ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek if (!bitsInit || !T->isIntegerType() || Ctx.getTypeSize(T) > bits) 8556ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek return UnknownVal(); 8561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8571397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek return state->getSVal(Ex); 8586ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek} 8596ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 860e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processBranch(const Stmt* Condition, const Stmt* Term, 861d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis BranchNodeBuilder& builder) { 8621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 863b2331834a0515c80862ee51325c758a053829f15Ted Kremenek // Check for NULL conditions; e.g. "for(;;)" 8641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!Condition) { 865b2331834a0515c80862ee51325c758a053829f15Ted Kremenek builder.markInfeasible(false); 866b2331834a0515c80862ee51325c758a053829f15Ted Kremenek return; 867b2331834a0515c80862ee51325c758a053829f15Ted Kremenek } 8681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 86921028dd8850c64a414f7a82dfddcc291351203d6Ted Kremenek PrettyStackTraceLoc CrashInfo(getContext().getSourceManager(), 87021028dd8850c64a414f7a82dfddcc291351203d6Ted Kremenek Condition->getLocStart(), 87121028dd8850c64a414f7a82dfddcc291351203d6Ted Kremenek "Error evaluating branch"); 8720fb0bc4067d6c9d7c0e655300ef309b05d3adfc9Ted Kremenek 873cc05d511b26ac6dc80fcbcc78ac305d2755aa0b9Argyrios Kyrtzidis getCheckerManager().runCheckersForBranchCondition(Condition, builder, *this); 874cc05d511b26ac6dc80fcbcc78ac305d2755aa0b9Argyrios Kyrtzidis 8750835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // If the branch condition is undefined, return; 8760835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu if (!builder.isFeasible(true) && !builder.isFeasible(false)) 8770835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu return; 8781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8790835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu const GRState* PrevState = builder.getState(); 8801397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal X = PrevState->getSVal(Condition); 881b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek 88273c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis if (X.isUnknownOrUndef()) { 8830835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // Give it a chance to recover from unknown. 8840835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu if (const Expr *Ex = dyn_cast<Expr>(Condition)) { 8850835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu if (Ex->getType()->isIntegerType()) { 8860835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // Try to recover some path-sensitivity. Right now casts of symbolic 8870835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // integers that promote their values are currently not tracked well. 8880835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // If 'Condition' is such an expression, try and recover the 8890835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // underlying value and use that instead. 8900835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu SVal recovered = RecoverCastedSymbol(getStateManager(), 8910835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu builder.getState(), Condition, 8920835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu getContext()); 893b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 8940835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu if (!recovered.isUnknown()) { 8950835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu X = recovered; 8960835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu } 897b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 8980835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu } 8990835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // If the condition is still unknown, give up. 90073c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis if (X.isUnknownOrUndef()) { 9010835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu builder.generateNode(MarkBranch(PrevState, Term, true), true); 9020835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu builder.generateNode(MarkBranch(PrevState, Term, false), false); 903b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek return; 9041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 905b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 9061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9070835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu DefinedSVal V = cast<DefinedSVal>(X); 9080835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu 9096a6719a3a11087b48d9f1a4eb08b3bd43cb05a65Ted Kremenek // Process the true branch. 910520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek if (builder.isFeasible(true)) { 91128f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *state = PrevState->assume(V, true)) 912520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek builder.generateNode(MarkBranch(state, Term, true), true); 913520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek else 914520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek builder.markInfeasible(true); 915520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek } 9161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Process the false branch. 918520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek if (builder.isFeasible(false)) { 91928f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *state = PrevState->assume(V, false)) 920520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek builder.generateNode(MarkBranch(state, Term, false), false); 921520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek else 922520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek builder.markInfeasible(false); 923520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek } 924f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek} 925f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek 926e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenek/// processIndirectGoto - Called by CoreEngine. Used to generate successor 927754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek/// nodes by processing the 'effects' of a computed goto jump. 928ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattnervoid ExprEngine::processIndirectGoto(IndirectGotoNodeBuilder &builder) { 929754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek 9301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const GRState *state = builder.getState(); 9311397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getSVal(builder.getTarget()); 9321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 933754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // Three possibilities: 934754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // 935754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // (1) We know the computed label. 9364a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek // (2) The label is NULL (or some other constant), or Undefined. 937754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // (3) We have no clue about the label. Dispatch to all targets. 938754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // 9391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 940d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis typedef IndirectGotoNodeBuilder::iterator iterator; 941754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek 9421c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu if (isa<loc::GotoLabel>(V)) { 943ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner const LabelDecl *L = cast<loc::GotoLabel>(V).getLabel(); 9441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 945ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner for (iterator I = builder.begin(), E = builder.end(); I != E; ++I) { 94624f1a967741ff9f8025ee23be12ba6feacc31f77Ted Kremenek if (I.getLabel() == L) { 947a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek builder.generateNode(I, state); 948754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek return; 949754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek } 950754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek } 9511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 952ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner assert(false && "No block with label."); 953754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek return; 954754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek } 955754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek 9561c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu if (isa<loc::ConcreteInt>(V) || isa<UndefinedVal>(V)) { 957754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // Dispatch to the first target and mark it as a sink. 9582055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu //ExplodedNode* N = builder.generateNode(builder.begin(), state, true); 9592055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu // FIXME: add checker visit. 9602055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu // UndefBranches.insert(N); 961754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek return; 962754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek } 9631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 964754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // This is really a catch-all. We don't support symbolics yet. 965b3cfd58c9b13325d994e5f9b5065e6a22d91911dTed Kremenek // FIXME: Implement dispatch for symbolic pointers. 9661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 967754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek for (iterator I=builder.begin(), E=builder.end(); I != E; ++I) 968a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek builder.generateNode(I, state); 969754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek} 970f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek 971e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 972d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitGuardedExpr(const Expr* Ex, const Expr* L, 97303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* R, 974031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode* Pred, ExplodedNodeSet& Dst) { 9751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9760a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek assert(Ex == currentStmt && 977bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu Pred->getLocationContext()->getCFG()->isBlkExpr(Ex)); 9781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 979a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(Pred); 9801397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal X = state->getSVal(Ex); 9811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 982e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek assert (X.isUndef()); 9831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 98403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr *SE = (Expr*) cast<UndefinedVal>(X).getData(); 9851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(SE); 9861397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek X = state->getSVal(SE); 9871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 988e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // Make sure that we invalidate the previous binding. 9898e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, Ex, Pred, state->BindExpr(Ex, X, true)); 990e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek} 991e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 992d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis/// ProcessEndPath - Called by CoreEngine. Used to generate end-of-path 99373099bfea9f5d4ec05265170bbefec3d76fb6b5eTed Kremenek/// nodes when the control reaches the end of a function. 994e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processEndOfFunction(EndOfFunctionNodeBuilder& builder) { 9959c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek getTF().evalEndPath(*this, builder); 99673099bfea9f5d4ec05265170bbefec3d76fb6b5eTed Kremenek StateMgr.EndPath(builder.getState()); 997af5800a1e287990bb547e052f257adeeae5ab476Argyrios Kyrtzidis getCheckerManager().runCheckersForEndPath(builder, *this); 99873099bfea9f5d4ec05265170bbefec3d76fb6b5eTed Kremenek} 99973099bfea9f5d4ec05265170bbefec3d76fb6b5eTed Kremenek 1000d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis/// ProcessSwitch - Called by CoreEngine. Used to generate successor 1001daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek/// nodes by processing the 'effects' of a switch statement. 1002e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processSwitch(SwitchNodeBuilder& builder) { 1003d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis typedef SwitchNodeBuilder::iterator iterator; 10041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const GRState* state = builder.getState(); 100503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* CondE = builder.getCondition(); 10061397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal CondV_untested = state->getSVal(CondE); 1007daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek 10085b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek if (CondV_untested.isUndef()) { 10092055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu //ExplodedNode* N = builder.generateDefaultCaseNode(state, true); 1010b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // FIXME: add checker 10112055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu //UndefBranches.insert(N); 10122055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu 1013daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek return; 1014daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 10155b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek DefinedOrUnknownSVal CondV = cast<DefinedOrUnknownSVal>(CondV_untested); 1016692416c214a3b234236dedcf875735a9cc29e90bTed Kremenek 10175b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek const GRState *DefaultSt = state; 101834feff654c6304e0a59ceb1376989d28dbc956ffTed Kremenek 101934feff654c6304e0a59ceb1376989d28dbc956ffTed Kremenek iterator I = builder.begin(), EI = builder.end(); 102034feff654c6304e0a59ceb1376989d28dbc956ffTed Kremenek bool defaultIsFeasible = I == EI; 10211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 102234feff654c6304e0a59ceb1376989d28dbc956ffTed Kremenek for ( ; I != EI; ++I) { 1023e71f3d587844110d836c82250830b27b1651afdbTed Kremenek // Successor may be pruned out during CFG construction. 1024e71f3d587844110d836c82250830b27b1651afdbTed Kremenek if (!I.getBlock()) 1025e71f3d587844110d836c82250830b27b1651afdbTed Kremenek continue; 1026e71f3d587844110d836c82250830b27b1651afdbTed Kremenek 1027412711774cf912bac8e81ef86da33acac6856b8aTed Kremenek const CaseStmt* Case = I.getCase(); 102872afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek 102972afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek // Evaluate the LHS of the case value. 103072afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek Expr::EvalResult V1; 10311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool b = Case->getLHS()->Evaluate(V1, getContext()); 10321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 103372afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek // Sanity checks. These go away in Release builds. 10341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(b && V1.Val.isInt() && !V1.HasSideEffects 103572afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek && "Case condition must evaluate to an integer constant."); 1036c6ed729f669044f5072a49d79041f455d971ece3Jeffrey Yasskin (void)b; // silence unused variable warning 10371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(V1.Val.getInt().getBitWidth() == 103872afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek getContext().getTypeSize(CondE->getType())); 10391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1040daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // Get the RHS of the case, if it exists. 104172afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek Expr::EvalResult V2; 10421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 104303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const Expr* E = Case->getRHS()) { 104472afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek b = E->Evaluate(V2, getContext()); 10451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(b && V2.Val.isInt() && !V2.HasSideEffects 104672afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek && "Case condition must evaluate to an integer constant."); 1047c6ed729f669044f5072a49d79041f455d971ece3Jeffrey Yasskin (void)b; // silence unused variable warning 1048daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 104914a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek else 105014a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek V2 = V1; 10511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1052daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // FIXME: Eventually we should replace the logic below with a range 1053daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // comparison, rather than concretize the values within the range. 1054aa1c4e5a6b87b62d991c55a0d4522bcd778068d7Ted Kremenek // This should be easy once we have "ranges" for NonLVals. 10551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 105614a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek do { 10571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump nonloc::ConcreteInt CaseVal(getBasicVals().getValue(V1.Val.getInt())); 10589c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek DefinedOrUnknownSVal Res = svalBuilder.evalEQ(DefaultSt ? DefaultSt : state, 105948569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek CondV, CaseVal); 1060b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 10611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Now "assume" that the case matches. 106228f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState* stateNew = state->assume(Res, true)) { 1063a591bc04d21fa62ebffcb2c7814d738ca8f5e2f9Ted Kremenek builder.generateCaseStmtNode(I, stateNew); 10641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1065daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // If CondV evaluates to a constant, then we know that this 1066daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // is the *only* case that we can take, so stop evaluating the 1067daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // others. 10681c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu if (isa<nonloc::ConcreteInt>(CondV)) 1069daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek return; 1070daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 10711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1072daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // Now "assume" that the case doesn't match. Add this state 1073daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // to the default state (if it is feasible). 107448569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek if (DefaultSt) { 107528f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *stateNew = DefaultSt->assume(Res, false)) { 107648569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek defaultIsFeasible = true; 107748569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek DefaultSt = stateNew; 107848569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek } 107948569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek else { 108048569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek defaultIsFeasible = false; 108148569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek DefaultSt = NULL; 108248569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek } 10835014ab113eb211b8320ae30b173d7020352663c6Ted Kremenek } 1084b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 108514a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek // Concretize the next value in the range. 108672afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek if (V1.Val.getInt() == V2.Val.getInt()) 108714a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek break; 10881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 108972afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek ++V1.Val.getInt(); 109072afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek assert (V1.Val.getInt() <= V2.Val.getInt()); 10911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 109214a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek } while (true); 1093daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 10941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10954d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek if (!defaultIsFeasible) 10964d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek return; 10974d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek 10984d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // If we have switch(enum value), the default branch is not 10994d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // feasible if all of the enum constants not covered by 'case:' statements 11004d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // are not feasible values for the switch condition. 11014d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // 11024d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // Note that this isn't as accurate as it could be. Even if there isn't 11034d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // a case for a particular enum value as long as that enum value isn't 11044d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // feasible then it shouldn't be considered for making 'default:' reachable. 11054d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek const SwitchStmt *SS = builder.getSwitch(); 11064d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek const Expr *CondExpr = SS->getCond()->IgnoreParenImpCasts(); 11074d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek if (CondExpr->getType()->getAs<EnumType>()) { 11084d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek if (SS->isAllEnumCasesCovered()) 11094d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek return; 11104d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek } 11114d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek 11124d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek builder.generateDefaultCaseNode(DefaultSt); 1113daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek} 1114daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek 1115e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processCallEnter(CallEnterNodeBuilder &B) { 11162ccf047adf877f5e821210b1ce1a2c8289acadc0Ted Kremenek const GRState *state = B.getState()->enterStackFrame(B.getCalleeContext()); 1117d048c6ef5b6cfaa0cecb8cc1d4bdace32ed21d07Ted Kremenek B.generateNode(state); 1118102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor} 1119102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor 1120e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processCallExit(CallExitNodeBuilder &B) { 1121102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor const GRState *state = B.getState(); 1122102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor const ExplodedNode *Pred = B.getPredecessor(); 112319b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu const StackFrameContext *calleeCtx = 1124102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor cast<StackFrameContext>(Pred->getLocationContext()); 112519b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu const Stmt *CE = calleeCtx->getCallSite(); 1126102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor 11276190ec29f0895185bbec95a932429b8832917fecZhongxing Xu // If the callee returns an expression, bind its value to CallExpr. 11286190ec29f0895185bbec95a932429b8832917fecZhongxing Xu const Stmt *ReturnedExpr = state->get<ReturnExpr>(); 11296190ec29f0895185bbec95a932429b8832917fecZhongxing Xu if (ReturnedExpr) { 11306190ec29f0895185bbec95a932429b8832917fecZhongxing Xu SVal RetVal = state->getSVal(ReturnedExpr); 11316190ec29f0895185bbec95a932429b8832917fecZhongxing Xu state = state->BindExpr(CE, RetVal); 1132bd2b2084e58577f17308f910770a5563a344251aZhongxing Xu // Clear the return expr GDM. 11330541d106eae48f4238097df03a72028a610e0dceZhongxing Xu state = state->remove<ReturnExpr>(); 11346190ec29f0895185bbec95a932429b8832917fecZhongxing Xu } 11356190ec29f0895185bbec95a932429b8832917fecZhongxing Xu 11368e18c1b840882d26039503629d7e4ad4822f3bdaZhongxing Xu // Bind the constructed object value to CXXConstructExpr. 11378e18c1b840882d26039503629d7e4ad4822f3bdaZhongxing Xu if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(CE)) { 11389dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu const CXXThisRegion *ThisR = 113919b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu getCXXThisRegion(CCE->getConstructor()->getParent(), calleeCtx); 1140d706434b0231c76fd9acf30060646a7aa8f69aefZhongxing Xu 11418e18c1b840882d26039503629d7e4ad4822f3bdaZhongxing Xu SVal ThisV = state->getSVal(ThisR); 114205e539175d9bac678fca8e77665e88b685729850Zhongxing Xu // Always bind the region to the CXXConstructExpr. 114305e539175d9bac678fca8e77665e88b685729850Zhongxing Xu state = state->BindExpr(CCE, ThisV); 11448e18c1b840882d26039503629d7e4ad4822f3bdaZhongxing Xu } 11458e18c1b840882d26039503629d7e4ad4822f3bdaZhongxing Xu 1146d048c6ef5b6cfaa0cecb8cc1d4bdace32ed21d07Ted Kremenek B.generateNode(state); 1147102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor} 1148102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor 1149e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1150e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Transfer functions: logical operations ('&&', '||'). 1151e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1152daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek 1153d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitLogicalExpr(const BinaryOperator* B, ExplodedNode* Pred, 1154031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet& Dst) { 11551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11562de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert(B->getOpcode() == BO_LAnd || 11572de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall B->getOpcode() == BO_LOr); 11581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11590a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek assert(B==currentStmt && Pred->getLocationContext()->getCFG()->isBlkExpr(B)); 11601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1161a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(Pred); 11621397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal X = state->getSVal(B); 11633ff12591494a3cb3d3a24427975df58714ac3b2fTed Kremenek assert(X.isUndef()); 11641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11655b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek const Expr *Ex = (const Expr*) cast<UndefinedVal>(X).getData(); 11663ff12591494a3cb3d3a24427975df58714ac3b2fTed Kremenek assert(Ex); 11671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 116805a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek if (Ex == B->getRHS()) { 11691397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek X = state->getSVal(Ex); 11701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11714a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek // Handle undefined values. 11724a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek if (X.isUndef()) { 11738e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, B, Pred, state->BindExpr(B, X)); 117458b3321009b3f750fb4587b12c2024bb77e6ebf0Ted Kremenek return; 117558b3321009b3f750fb4587b12c2024bb77e6ebf0Ted Kremenek } 1176b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 11775b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek DefinedOrUnknownSVal XD = cast<DefinedOrUnknownSVal>(X); 11781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 117905a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // We took the RHS. Because the value of the '&&' or '||' expression must 118005a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // evaluate to 0 or 1, we must assume the value of the RHS evaluates to 0 118105a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // or 1. Alternatively, we could take a lazy approach, and calculate this 118205a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // value later when necessary. We don't have the machinery in place for 118305a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // this right now, and since most logical expressions are used for branches, 11841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // the payoff is not likely to be large. Instead, we do eager evaluation. 118528f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *newState = state->assume(XD, true)) 11861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump MakeNode(Dst, B, Pred, 1187c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek newState->BindExpr(B, svalBuilder.makeIntVal(1U, B->getType()))); 11881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 118928f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *newState = state->assume(XD, false)) 11901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump MakeNode(Dst, B, Pred, 1191c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek newState->BindExpr(B, svalBuilder.makeIntVal(0U, B->getType()))); 1192f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek } 1193f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek else { 119405a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // We took the LHS expression. Depending on whether we are '&&' or 119505a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // '||' we know what the value of the expression is via properties of 119605a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // the short-circuiting. 1197c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek X = svalBuilder.makeIntVal(B->getOpcode() == BO_LAnd ? 0U : 1U, 1198d91ee27950ef5c321db1ac2aa5becb75ffe7cb14Zhongxing Xu B->getType()); 11998e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, B, Pred, state->BindExpr(B, X)); 120005a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek } 120171c29bdc931bc49644c581ec7d698f0dbf01a0aaTed Kremenek} 12021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1203e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1204ec96a2d52d16e150baaf629cd35e3fabff5d8915Ted Kremenek// Transfer functions: Loads and stores. 1205e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1206d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek 1207d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitBlockExpr(const BlockExpr *BE, ExplodedNode *Pred, 1208c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek ExplodedNodeSet &Dst) { 1209b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 121066078610be5e4319de02efa283b07887c73c2e27Ted Kremenek ExplodedNodeSet Tmp; 1211b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1212c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek CanQualType T = getContext().getCanonicalType(BE->getType()); 1213c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.getBlockPointer(BE->getBlockDecl(), T, 12140a8112a78d00b5140c5b7f16c3b34c2c0c13c1a0Ted Kremenek Pred->getLocationContext()); 12150a8112a78d00b5140c5b7f16c3b34c2c0c13c1a0Ted Kremenek 121666078610be5e4319de02efa283b07887c73c2e27Ted Kremenek MakeNode(Tmp, BE, Pred, GetState(Pred)->BindExpr(BE, V), 1217c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek ProgramPoint::PostLValueKind); 1218b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 121966078610be5e4319de02efa283b07887c73c2e27Ted Kremenek // Post-visit the BlockExpr. 1220eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPostStmt(Dst, Tmp, BE, *this); 1221c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek} 1222c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek 1223d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitCommonDeclRefExpr(const Expr *Ex, const NamedDecl *D, 1224d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNode *Pred, 1225d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNodeSet &Dst) { 12265b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek const GRState *state = GetState(Pred); 12276d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu 12286d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu if (const VarDecl* VD = dyn_cast<VarDecl>(D)) { 1229892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek assert(Ex->isLValue()); 1230d17da2b99f323fa91b01e1dd119cc32e0ee8197dTed Kremenek SVal V = state->getLValue(VD, Pred->getLocationContext()); 1231a7581731b1453b51b26154d2409d42a5b6395079Zhongxing Xu 1232892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // For references, the 'lvalue' is the pointer address stored in the 1233892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // reference region. 1234892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (VD->getType()->isReferenceType()) { 1235892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (const MemRegion *R = V.getAsRegion()) 1236892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek V = state->getSVal(R); 1237892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek else 1238892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek V = UnknownVal(); 1239852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 12406d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu 1241892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek MakeNode(Dst, Ex, Pred, state->BindExpr(Ex, V), 1242892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ProgramPoint::PostLValueKind); 1243852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return; 1244892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 1245892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (const EnumConstantDecl* ED = dyn_cast<EnumConstantDecl>(D)) { 1246892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek assert(!Ex->isLValue()); 1247c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.makeIntVal(ED->getInitVal()); 12488e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, Ex, Pred, state->BindExpr(Ex, V)); 12496d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu return; 1250892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 1251892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (const FunctionDecl* FD = dyn_cast<FunctionDecl>(D)) { 1252c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.getFunctionPointer(FD); 12538e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, Ex, Pred, state->BindExpr(Ex, V), 12547090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek ProgramPoint::PostLValueKind); 12556d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu return; 12561b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 12576d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu assert (false && 12586d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu "ValueDecl support for this ValueDecl not implemented."); 12593271f8d315712885ac87747369bb1d9f4b1ea81fTed Kremenek} 12603271f8d315712885ac87747369bb1d9f4b1ea81fTed Kremenek 1261540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek/// VisitArraySubscriptExpr - Transfer function for array accesses 1262d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitLvalArraySubscriptExpr(const ArraySubscriptExpr* A, 1263d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNode* Pred, 1264d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNodeSet& Dst){ 12651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 126603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Base = A->getBase()->IgnoreParens(); 126703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Idx = A->getIdx()->IgnoreParens(); 1268892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek 1269892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // Evaluate the base. 1270031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 1271892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(Base, Pred, Tmp); 12721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1273031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I1=Tmp.begin(), E1=Tmp.end(); I1!=E1; ++I1) { 1274031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp2; 1275d9bc33efa195114d6f2a365c26e5b8dba4e1cc38Ted Kremenek Visit(Idx, *I1, Tmp2); // Evaluate the index. 1276d694485f9d6e3ea7b458df8241dfffd38f62aca8Zhongxing Xu ExplodedNodeSet Tmp3; 1277eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(Tmp3, Tmp2, A, *this); 1278d694485f9d6e3ea7b458df8241dfffd38f62aca8Zhongxing Xu 1279d694485f9d6e3ea7b458df8241dfffd38f62aca8Zhongxing Xu for (ExplodedNodeSet::iterator I2=Tmp3.begin(),E2=Tmp3.end();I2!=E2; ++I2) { 1280a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I2); 12811397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getLValue(A->getType(), state->getSVal(Idx), 12821397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek state->getSVal(Base)); 1283892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek assert(A->isLValue()); 1284892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek MakeNode(Dst, A, *I2, state->BindExpr(A, V), ProgramPoint::PostLValueKind); 12854d0348b6c74d2710a3693bbfbcfc5fcb3bc132eeTed Kremenek } 12861b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 1287540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek} 1288540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek 1289469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek/// VisitMemberExpr - Transfer function for member expressions. 1290d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitMemberExpr(const MemberExpr* M, ExplodedNode* Pred, 1291d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNodeSet& Dst) { 12921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1293892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Expr *baseExpr = M->getBase()->IgnoreParens(); 1294892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet dstBase; 1295892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(baseExpr, Pred, dstBase); 12961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1297892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek FieldDecl *field = dyn_cast<FieldDecl>(M->getMemberDecl()); 1298892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (!field) // FIXME: skipping member expressions for non-fields 129986f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor return; 130086f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 1301892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek for (ExplodedNodeSet::iterator I = dstBase.begin(), E = dstBase.end(); 1302892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek I != E; ++I) { 1303a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 1304892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal baseExprVal = state->getSVal(baseExpr); 1305892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (isa<nonloc::LazyCompoundVal>(baseExprVal) || 1306c2e20d0c42cf085940c9a9cb495a7116d1b0eb07Argyrios Kyrtzidis isa<nonloc::CompoundVal>(baseExprVal) || 1307c2e20d0c42cf085940c9a9cb495a7116d1b0eb07Argyrios Kyrtzidis // FIXME: This can originate by conjuring a symbol for an unknown 1308c2e20d0c42cf085940c9a9cb495a7116d1b0eb07Argyrios Kyrtzidis // temporary struct object, see test/Analysis/fields.c: 1309c2e20d0c42cf085940c9a9cb495a7116d1b0eb07Argyrios Kyrtzidis // (p = getit()).x 1310c2e20d0c42cf085940c9a9cb495a7116d1b0eb07Argyrios Kyrtzidis isa<nonloc::SymbolVal>(baseExprVal)) { 1311892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek MakeNode(Dst, M, *I, state->BindExpr(M, UnknownVal())); 1312892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek continue; 1313892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 1314892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek 1315d9bc33efa195114d6f2a365c26e5b8dba4e1cc38Ted Kremenek // FIXME: Should we insert some assumption logic in here to determine 1316d9bc33efa195114d6f2a365c26e5b8dba4e1cc38Ted Kremenek // if "Base" is a valid piece of memory? Before we put this assumption 131786f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // later when using FieldOffset lvals (which we no longer have). 1318d9bc33efa195114d6f2a365c26e5b8dba4e1cc38Ted Kremenek 1319892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // For all other cases, compute an lvalue. 1320892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal L = state->getLValue(field, baseExprVal); 1321892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (M->isLValue()) 1322662174ca204cb520f634bdcb34a3708f45389d14Zhongxing Xu MakeNode(Dst, M, *I, state->BindExpr(M, L), ProgramPoint::PostLValueKind); 1323662174ca204cb520f634bdcb34a3708f45389d14Zhongxing Xu else 13249c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLoad(Dst, M, *I, state, L); 1325469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek } 1326469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek} 1327469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek 13289c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek/// evalBind - Handle the semantics of binding a value to a specific location. 13299c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek/// This method is used by evalStore and (soon) VisitDeclStmt, and others. 1330d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalBind(ExplodedNodeSet& Dst, const Stmt* StoreE, 133179d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek ExplodedNode* Pred, const GRState* state, 133279d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek SVal location, SVal Val, bool atDeclInit) { 1333b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1334b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1335b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // Do a previsit of the bind. 1336b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek ExplodedNodeSet CheckedSet, Src; 1337b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek Src.Add(Pred); 1338eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForBind(CheckedSet, Src, location, Val, StoreE, 1339eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis *this); 1340b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1341b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek for (ExplodedNodeSet::iterator I = CheckedSet.begin(), E = CheckedSet.end(); 1342b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek I!=E; ++I) { 1343b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1344b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek if (Pred != *I) 1345b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek state = GetState(*I); 1346b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1347b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek const GRState* newState = 0; 1348a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek 1349b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek if (atDeclInit) { 1350b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek const VarRegion *VR = 1351b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek cast<VarRegion>(cast<loc::MemRegionVal>(location).getRegion()); 1352f6f56d4fc8ebce17e7b83eb2c35f57a055c22283Ted Kremenek 1353b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek newState = state->bindDecl(VR, Val); 1354f6f56d4fc8ebce17e7b83eb2c35f57a055c22283Ted Kremenek } 1355f6f56d4fc8ebce17e7b83eb2c35f57a055c22283Ted Kremenek else { 1356b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek if (location.isUnknown()) { 1357b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // We know that the new state will be the same as the old state since 1358b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // the location of the binding is "unknown". Consequently, there 1359b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // is no reason to just create a new node. 1360b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek newState = state; 1361b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek } 1362b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek else { 1363b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // We are binding to a value other than 'unknown'. Perform the binding 1364b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // using the StoreManager. 1365b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek newState = state->bindLoc(cast<Loc>(location), Val); 1366b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek } 1367f6f56d4fc8ebce17e7b83eb2c35f57a055c22283Ted Kremenek } 1368a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek 1369d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis // The next thing to do is check if the TransferFuncs object wants to 1370b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // update the state based on the new binding. If the GRTransferFunc object 1371b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // doesn't do anything, just auto-propagate the current state. 137279d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek 137379d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek // NOTE: We use 'AssignE' for the location of the PostStore if 'AssignE' 137479d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek // is non-NULL. Checkers typically care about 137579d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek 1376d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilderRef BuilderRef(Dst, *Builder, *this, *I, newState, StoreE, 137796ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek true); 13781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13799c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek getTF().evalBind(BuilderRef, location, Val); 1380b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek } 1381a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek} 1382a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek 13839c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek/// evalStore - Handle the semantics of a store via an assignment. 1384a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek/// @param Dst The node set to store generated state nodes 1385e8a4d7d0064b357a30fe7ee4f2ddc02f9ffc0357Zhongxing Xu/// @param AssignE The assignment expression if the store happens in an 1386e8a4d7d0064b357a30fe7ee4f2ddc02f9ffc0357Zhongxing Xu/// assignment. 1387e8a4d7d0064b357a30fe7ee4f2ddc02f9ffc0357Zhongxing Xu/// @param LocatioinE The location expression that is stored to. 1388a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek/// @param state The current simulation state 1389a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek/// @param location The location to store the value 1390a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek/// @param Val The value to be stored 1391d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalStore(ExplodedNodeSet& Dst, const Expr *AssignE, 139279d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek const Expr* LocationE, 139350ecd1536a2b70327e9eb2c2c2a652cde3dae365Ted Kremenek ExplodedNode* Pred, 13941670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek const GRState* state, SVal location, SVal Val, 13951670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek const void *tag) { 13961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1397d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis assert(Builder && "StmtNodeBuilder must be defined."); 13981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 139914429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis // Proceed with the store. We use AssignE as the anchor for the PostStore 140014429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis // ProgramPoint if it is non-NULL, and LocationE otherwise. 140114429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis const Expr *StoreE = AssignE ? AssignE : LocationE; 140214429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 140314429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis if (isa<loc::ObjCPropRef>(location)) { 140414429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis loc::ObjCPropRef prop = cast<loc::ObjCPropRef>(location); 140514429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNodeSet src = Pred; 140614429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis return VisitObjCMessage(ObjCPropertySetter(prop.getPropRefExpr(), 140714429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis StoreE, Val), src, Dst); 140814429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis } 140914429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 14101b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Evaluate the location (checks for bad dereferences). 1411b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ExplodedNodeSet Tmp; 14129c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLocation(Tmp, LocationE, Pred, state, location, tag, false); 14131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1414b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (Tmp.empty()) 14151b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek return; 1416b0533965f1b4db020692e3b23ca7b3bc15bf5897Ted Kremenek 141773c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis if (location.isUndef()) 141873c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis return; 1419a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek 1420b4b817d704287836b52b34369009e682f208aa2bTed Kremenek SaveAndRestore<ProgramPoint::Kind> OldSPointKind(Builder->PointKind, 1421b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ProgramPoint::PostStoreKind); 1422b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1423b4b817d704287836b52b34369009e682f208aa2bTed Kremenek for (ExplodedNodeSet::iterator NI=Tmp.begin(), NE=Tmp.end(); NI!=NE; ++NI) 14249c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalBind(Dst, StoreE, *NI, GetState(*NI), location, Val); 14251b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek} 14261b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 1427d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalLoad(ExplodedNodeSet& Dst, const Expr *Ex, 14283992a50eea030a2913f1d267554f55ecd00d694cZhongxing Xu ExplodedNode* Pred, 14291670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek const GRState* state, SVal location, 1430652be346f74feba027bcbdeb6a3e3f4755a0e62cZhongxing Xu const void *tag, QualType LoadTy) { 1431cca8ab155e8c20b98ba2d90eb2b1c228895e06fdZhanyong Wan assert(!isa<NonLoc>(location) && "location cannot be a NonLoc."); 14321b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 143314429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis if (isa<loc::ObjCPropRef>(location)) { 143414429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis loc::ObjCPropRef prop = cast<loc::ObjCPropRef>(location); 143514429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNodeSet src = Pred; 143614429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis return VisitObjCMessage(ObjCPropertyGetter(prop.getPropRefExpr(), Ex), 143714429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis src, Dst); 143814429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis } 143914429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 1440852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek // Are we loading from a region? This actually results in two loads; one 1441852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek // to fetch the address of the referenced value and one to fetch the 1442852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek // referenced value. 1443b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek if (const TypedRegion *TR = 1444852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek dyn_cast_or_null<TypedRegion>(location.getAsRegion())) { 1445b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1446018220c343c103b7dfaa117a7a474c7a7fd6d068Zhongxing Xu QualType ValTy = TR->getValueType(); 1447852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (const ReferenceType *RT = ValTy->getAs<ReferenceType>()) { 1448b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek static int loadReferenceTag = 0; 1449852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek ExplodedNodeSet Tmp; 14509c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLoadCommon(Tmp, Ex, Pred, state, location, &loadReferenceTag, 1451852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek getContext().getPointerType(RT->getPointeeType())); 1452852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek 1453852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek // Perform the load from the referenced value. 1454852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end() ; I!=E; ++I) { 1455852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek state = GetState(*I); 14561397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek location = state->getSVal(Ex); 14579c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLoadCommon(Dst, Ex, *I, state, location, tag, LoadTy); 1458b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek } 1459852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return; 1460852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 1461852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 1462b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 14639c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLoadCommon(Dst, Ex, Pred, state, location, tag, LoadTy); 1464852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek} 1465852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek 1466d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalLoadCommon(ExplodedNodeSet& Dst, const Expr *Ex, 1467852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek ExplodedNode* Pred, 1468852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek const GRState* state, SVal location, 1469852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek const void *tag, QualType LoadTy) { 1470b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 14711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Evaluate the location (checks for bad dereferences). 1472b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ExplodedNodeSet Tmp; 14739c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLocation(Tmp, Ex, Pred, state, location, tag, true); 14741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1475b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (Tmp.empty()) 14761b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek return; 1477b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 147873c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis if (location.isUndef()) 147973c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis return; 1480b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1481b4b817d704287836b52b34369009e682f208aa2bTed Kremenek SaveAndRestore<ProgramPoint::Kind> OldSPointKind(Builder->PointKind); 14821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14831b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Proceed with the load. 1484b4b817d704287836b52b34369009e682f208aa2bTed Kremenek for (ExplodedNodeSet::iterator NI=Tmp.begin(), NE=Tmp.end(); NI!=NE; ++NI) { 1485b4b817d704287836b52b34369009e682f208aa2bTed Kremenek state = GetState(*NI); 148696ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek 1487b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (location.isUnknown()) { 1488b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // This is important. We must nuke the old binding. 1489b4b817d704287836b52b34369009e682f208aa2bTed Kremenek MakeNode(Dst, Ex, *NI, state->BindExpr(Ex, UnknownVal()), 1490b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ProgramPoint::PostLoadKind, tag); 1491b4b817d704287836b52b34369009e682f208aa2bTed Kremenek } 1492b4b817d704287836b52b34369009e682f208aa2bTed Kremenek else { 149396ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek if (LoadTy.isNull()) 149496ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek LoadTy = Ex->getType(); 149596ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek SVal V = state->getSVal(cast<Loc>(location), LoadTy); 149696ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek MakeNode(Dst, Ex, *NI, state->bindExprAndLocation(Ex, location, V), 149796ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek ProgramPoint::PostLoadKind, tag); 1498b4b817d704287836b52b34369009e682f208aa2bTed Kremenek } 1499d5b499d43c3526fae7f9ebb6e2d50e79d3496cedZhongxing Xu } 15001b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek} 15011b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 1502d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalLocation(ExplodedNodeSet &Dst, const Stmt *S, 1503b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ExplodedNode* Pred, 1504b4b817d704287836b52b34369009e682f208aa2bTed Kremenek const GRState* state, SVal location, 1505b4b817d704287836b52b34369009e682f208aa2bTed Kremenek const void *tag, bool isLoad) { 150600b1ad2d56f3e39f95c3f61bf511a531ab6a4fa5Zhongxing Xu // Early checks for performance reason. 1507769ce3e93ad35bd9ac28e4d8b8f035ae4fd9a5b5Argyrios Kyrtzidis if (location.isUnknown()) { 1508b4b817d704287836b52b34369009e682f208aa2bTed Kremenek Dst.Add(Pred); 1509b4b817d704287836b52b34369009e682f208aa2bTed Kremenek return; 1510b4b817d704287836b52b34369009e682f208aa2bTed Kremenek } 1511b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 15129c0d6891b3ec4b0d20b8a295946c0dc5426d147cArgyrios Kyrtzidis ExplodedNodeSet Src; 1513eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis if (Builder->GetState(Pred) == state) { 1514eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis Src.Add(Pred); 1515eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis } else { 1516eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // Associate this new state with an ExplodedNode. 1517eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // FIXME: If I pass null tag, the graph is incorrect, e.g for 1518eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // int *p; 1519eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // p = 0; 1520eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // *p = 0xDEADBEEF; 1521eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // "p = 0" is not noted as "Null pointer value stored to 'p'" but 1522eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // instead "int *p" is noted as 1523eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // "Variable 'p' initialized to a null pointer value" 1524eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis ExplodedNode *N = Builder->generateNode(S, state, Pred, this); 1525eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis Src.Add(N ? N : Pred); 15260296c22557b3735e2ffeff690eb46fb0e9152bccTed Kremenek } 1527eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForLocation(Dst, Src, location, isLoad, S, 1528eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis *this); 1529ec96a2d52d16e150baaf629cd35e3fabff5d8915Ted Kremenek} 1530ec96a2d52d16e150baaf629cd35e3fabff5d8915Ted Kremenek 1531d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisbool ExprEngine::InlineCall(ExplodedNodeSet &Dst, const CallExpr *CE, 15321c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu ExplodedNode *Pred) { 1533b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek return false; 1534b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1535b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Inlining isn't correct right now because we: 1536b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // (a) don't generate CallExit nodes. 1537b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // (b) we need a way to postpone doing post-visits of CallExprs until 1538b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // the CallExit. This means we need CallExits for the non-inline 1539b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // cases as well. 1540b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1541b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek#if 0 15421c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu const GRState *state = GetState(Pred); 15431c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu const Expr *Callee = CE->getCallee(); 15441c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu SVal L = state->getSVal(Callee); 15451c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu 15461c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu const FunctionDecl *FD = L.getAsFunctionDecl(); 15471c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu if (!FD) 15481c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu return false; 15491c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu 1550b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Specially handle CXXMethods. 1551b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const CXXMethodDecl *methodDecl = 0; 1552b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1553b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek switch (CE->getStmtClass()) { 1554b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek default: break; 1555b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CXXOperatorCallExprClass: { 1556b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const CXXOperatorCallExpr *opCall = cast<CXXOperatorCallExpr>(CE); 1557b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek methodDecl = 1558b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek llvm::dyn_cast_or_null<CXXMethodDecl>(opCall->getCalleeDecl()); 1559b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek break; 1560b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek } 1561b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CXXMemberCallExprClass: { 1562b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const CXXMemberCallExpr *memberCall = cast<CXXMemberCallExpr>(CE); 1563b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const MemberExpr *memberExpr = 1564b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek cast<MemberExpr>(memberCall->getCallee()->IgnoreParens()); 1565b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek methodDecl = cast<CXXMethodDecl>(memberExpr->getMemberDecl()); 1566b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek break; 1567b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek } 1568b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek } 1569b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1570b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1571b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1572b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1573c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu // Check if the function definition is in the same translation unit. 1574c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu if (FD->hasBody(FD)) { 157519b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu const StackFrameContext *stackFrame = 157619b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu AMgr.getStackFrame(AMgr.getAnalysisContext(FD), 157719b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu Pred->getLocationContext(), 1578892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek CE, Builder->getBlock(), Builder->getIndex()); 1579c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu // Now we have the definition of the callee, create a CallEnter node. 158019b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu CallEnter Loc(CE, stackFrame, Pred->getLocationContext()); 1581c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu 1582c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu ExplodedNode *N = Builder->generateNode(Loc, state, Pred); 1583c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu Dst.Add(N); 1584c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu return true; 1585c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu } 15861c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu 1587c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu // Check if we can find the function definition in other translation units. 1588c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu if (AMgr.hasIndexer()) { 158919b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu AnalysisContext *C = AMgr.getAnalysisContextInAnotherTU(FD); 1590c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu if (C == 0) 1591c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu return false; 159219b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu const StackFrameContext *stackFrame = 159319b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu AMgr.getStackFrame(C, Pred->getLocationContext(), 1594892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek CE, Builder->getBlock(), Builder->getIndex()); 159519b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu CallEnter Loc(CE, stackFrame, Pred->getLocationContext()); 1596c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu ExplodedNode *N = Builder->generateNode(Loc, state, Pred); 15971c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu Dst.Add(N); 1598c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu return true; 1599c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu } 1600b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1601b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Generate the CallExit node. 1602c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu 1603c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu return false; 1604b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek#endif 16051c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu} 16061c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu 1607b277159055933e610bbc80262b600d3ad7e0595cTed Kremenekvoid ExprEngine::VisitCallExpr(const CallExpr* CE, ExplodedNode* Pred, 1608b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek ExplodedNodeSet& dst) { 16093cead901aab394fe8e84953235959ece8002854fTed Kremenek 16109d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // Determine the type of function we're calling (if available). 161172564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor const FunctionProtoType *Proto = NULL; 16129d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor QualType FnType = CE->getCallee()->IgnoreParens()->getType(); 16136217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek if (const PointerType *FnTypePtr = FnType->getAs<PointerType>()) 1614183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall Proto = FnTypePtr->getPointeeType()->getAs<FunctionProtoType>(); 16159d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor 1616b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Should the first argument be evaluated as an lvalue? 1617b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek bool firstArgumentAsLvalue = false; 1618b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek switch (CE->getStmtClass()) { 1619b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CXXOperatorCallExprClass: 1620b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek firstArgumentAsLvalue = true; 1621b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek break; 1622b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek default: 1623b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek break; 16245a5d98bc6962dc2d1aaa5e0e522f1bf84273b9c1Ted Kremenek } 1625b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1626b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Evaluate the arguments. 1627b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek ExplodedNodeSet dstArgsEvaluated; 1628b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek evalArguments(CE->arg_begin(), CE->arg_end(), Proto, Pred, dstArgsEvaluated, 1629b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek firstArgumentAsLvalue); 1630b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1631b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Evaluate the callee. 1632b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek ExplodedNodeSet dstCalleeEvaluated; 1633b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek evalCallee(CE, dstArgsEvaluated, dstCalleeEvaluated); 1634b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1635b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Perform the previsit of the CallExpr. 1636b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek ExplodedNodeSet dstPreVisit; 1637b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, dstCalleeEvaluated, 1638b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek CE, *this); 1639b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1640b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Now evaluate the call itself. 1641eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis class DefaultEval : public GraphExpander { 1642eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis ExprEngine &Eng; 1643eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis const CallExpr *CE; 1644eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis public: 1645eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis 1646eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis DefaultEval(ExprEngine &eng, const CallExpr *ce) 1647b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek : Eng(eng), CE(ce) {} 1648eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis virtual void expandGraph(ExplodedNodeSet &Dst, ExplodedNode *Pred) { 1649b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Should we inline the call? 1650eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis if (Eng.getAnalysisManager().shouldInlineCall() && 1651eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis Eng.InlineCall(Dst, CE, Pred)) { 1652b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek return; 165317f4da8f150f6b9dfb571cebd6299b06948e5385Ted Kremenek } 1654b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1655b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek StmtNodeBuilder &Builder = Eng.getBuilder(); 1656b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek assert(&Builder && "StmtNodeBuilder must be defined."); 1657b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1658b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Dispatch to the plug-in transfer function. 1659b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek unsigned oldSize = Dst.size(); 1660b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek SaveOr OldHasGen(Builder.hasGeneratedNode); 1661b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1662b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Dispatch to transfer function logic to handle the call itself. 1663b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const Expr* Callee = CE->getCallee()->IgnoreParens(); 1664b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const GRState* state = Eng.GetState(Pred); 1665b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek SVal L = state->getSVal(Callee); 1666b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek Eng.getTF().evalCall(Dst, Eng, Builder, CE, L, Pred); 1667b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1668b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Handle the case where no nodes where generated. Auto-generate that 1669b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // contains the updated state if we aren't generating sinks. 1670b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek if (!Builder.BuildSinks && Dst.size() == oldSize && 1671b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek !Builder.hasGeneratedNode) 1672b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek Eng.MakeNode(Dst, CE, Pred, state); 1673935ef90f4b065c7c865ee5b2a99c5f9b1a115d72Zhongxing Xu } 1674eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis }; 1675eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis 1676eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // Finally, evaluate the function call. We try each of the checkers 1677eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // to see if the can evaluate the function call. 1678b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek ExplodedNodeSet dstCallEvaluated; 1679eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis DefaultEval defEval(*this, CE); 1680b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek getCheckerManager().runCheckersForEvalCall(dstCallEvaluated, 1681b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek dstPreVisit, 1682b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek CE, *this, &defEval); 1683b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 16843cead901aab394fe8e84953235959ece8002854fTed Kremenek // Finally, perform the post-condition check of the CallExpr and store 16853cead901aab394fe8e84953235959ece8002854fTed Kremenek // the created nodes in 'Dst'. 1686b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek getCheckerManager().runCheckersForPostStmt(dst, dstCallEvaluated, CE, 1687b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek *this); 1688e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek} 1689e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 1690e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 169114429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis// Transfer function: Objective-C dot-syntax to access a property. 169214429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis//===----------------------------------------------------------------------===// 169314429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 169414429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidisvoid ExprEngine::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *Ex, 169514429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNode *Pred, 169614429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNodeSet &Dst) { 169714429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNodeSet dstBase; 16989319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis 16999319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis // Visit the receiver (if any). 17009319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis if (Ex->isObjectReceiver()) 17019319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis Visit(Ex->getBase(), Pred, dstBase); 17029319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis else 17039319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis dstBase = Pred; 170414429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 170514429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNodeSet dstPropRef; 170614429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 170714429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis // Using the base, compute the lvalue of the instance variable. 170814429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis for (ExplodedNodeSet::iterator I = dstBase.begin(), E = dstBase.end(); 170914429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis I!=E; ++I) { 171014429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNode *nodeBase = *I; 171114429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis const GRState *state = GetState(nodeBase); 171214429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis MakeNode(dstPropRef, Ex, *I, state->BindExpr(Ex, loc::ObjCPropRef(Ex))); 171314429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis } 171414429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 171514429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis Dst.insert(dstPropRef); 171614429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis} 171714429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 171814429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis//===----------------------------------------------------------------------===// 171997ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek// Transfer function: Objective-C ivar references. 172097ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek//===----------------------------------------------------------------------===// 172148af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek 1722f5cae63463cdb325a0bed146595607cba6da1ebcTed Kremenekstatic std::pair<const void*,const void*> EagerlyAssumeTag 1723a5fdd9ce694b1c2dbfd225cb6f55ef743d1ab562Douglas Gregor = std::pair<const void*,const void*>(&EagerlyAssumeTag,static_cast<void*>(0)); 1724f5cae63463cdb325a0bed146595607cba6da1ebcTed Kremenek 1725d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalEagerlyAssume(ExplodedNodeSet &Dst, ExplodedNodeSet &Src, 172603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr *Ex) { 1727031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I=Src.begin(), E=Src.end(); I!=E; ++I) { 1728031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode *Pred = *I; 17291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1730b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek // Test if the previous node was as the same expression. This can happen 1731b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek // when the expression fails to evaluate to anything meaningful and 1732b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek // (as an optimization) we don't generate a node. 17331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ProgramPoint P = Pred->getLocation(); 1734b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek if (!isa<PostStmt>(P) || cast<PostStmt>(P).getStmt() != Ex) { 17351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Dst.Add(Pred); 1736b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek continue; 17371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 1738b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek 173959fea60cc3dde7a14eeafab9469cb911023fdd7fZhongxing Xu const GRState* state = GetState(Pred); 17401397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getSVal(Ex); 17415b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek if (nonloc::SymExprVal *SEV = dyn_cast<nonloc::SymExprVal>(&V)) { 174248af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek // First assume that the condition is true. 174328f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *stateTrue = state->assume(*SEV, true)) { 17441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump stateTrue = stateTrue->BindExpr(Ex, 1745c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.makeIntVal(1U, Ex->getType())); 17461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Dst.Add(Builder->generateNode(PostStmtCustom(Ex, 174725e695b2d574d919cc1bbddf3a2efe073d449b1cZhongxing Xu &EagerlyAssumeTag, Pred->getLocationContext()), 174848af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek stateTrue, Pred)); 174948af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 17501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 175148af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek // Next, assume that the condition is false. 175228f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *stateFalse = state->assume(*SEV, false)) { 17531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump stateFalse = stateFalse->BindExpr(Ex, 1754c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.makeIntVal(0U, Ex->getType())); 175525e695b2d574d919cc1bbddf3a2efe073d449b1cZhongxing Xu Dst.Add(Builder->generateNode(PostStmtCustom(Ex, &EagerlyAssumeTag, 175625e695b2d574d919cc1bbddf3a2efe073d449b1cZhongxing Xu Pred->getLocationContext()), 175748af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek stateFalse, Pred)); 175848af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 175948af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 176048af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek else 176148af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek Dst.Add(Pred); 176248af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 176348af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek} 176448af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek 176548af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek//===----------------------------------------------------------------------===// 17664beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek// Transfer function: Objective-C @synchronized. 17674beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek//===----------------------------------------------------------------------===// 17684beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 1769d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitObjCAtSynchronizedStmt(const ObjCAtSynchronizedStmt *S, 17704beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek ExplodedNode *Pred, 17714beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek ExplodedNodeSet &Dst) { 17724beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 17734beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek // The mutex expression is a CFGElement, so we don't need to explicitly 17744beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek // visit it since it will already be processed. 17754beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 17764beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek // Pre-visit the ObjCAtSynchronizedStmt. 17774beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek ExplodedNodeSet Tmp; 17784beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek Tmp.Add(Pred); 1779eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(Dst, Tmp, S, *this); 17804beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek} 17814beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 17824beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek//===----------------------------------------------------------------------===// 178348af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek// Transfer function: Objective-C ivar references. 178448af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek//===----------------------------------------------------------------------===// 178597ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek 1786d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitLvalObjCIvarRefExpr(const ObjCIvarRefExpr* Ex, 1787d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNode* Pred, 1788d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNodeSet& Dst) { 17891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1790892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // Visit the base expression, which is needed for computing the lvalue 1791892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // of the ivar. 1792892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet dstBase; 1793892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const Expr *baseExpr = Ex->getBase(); 1794892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(baseExpr, Pred, dstBase); 17951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17966547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis ExplodedNodeSet dstIvar; 17976547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis 1798892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // Using the base, compute the lvalue of the instance variable. 1799892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek for (ExplodedNodeSet::iterator I = dstBase.begin(), E = dstBase.end(); 1800892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek I!=E; ++I) { 1801892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNode *nodeBase = *I; 1802892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const GRState *state = GetState(nodeBase); 1803892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal baseVal = state->getSVal(baseExpr); 1804892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal location = state->getLValue(Ex->getDecl(), baseVal); 18056547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis MakeNode(dstIvar, Ex, *I, state->BindExpr(Ex, location)); 180697ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek } 18076547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis 18086547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis // Perform the post-condition check of the ObjCIvarRefExpr and store 18096547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis // the created nodes in 'Dst'. 1810eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPostStmt(Dst, dstIvar, Ex, *this); 181197ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek} 181297ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek 181397ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek//===----------------------------------------------------------------------===// 1814af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek// Transfer function: Objective-C fast enumeration 'for' statements. 1815af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek//===----------------------------------------------------------------------===// 1816af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek 1817d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitObjCForCollectionStmt(const ObjCForCollectionStmt* S, 1818b317f8f5ca8737a5bbad97a3f7566a2dbd2ed61bZhongxing Xu ExplodedNode* Pred, ExplodedNodeSet& Dst) { 18191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1820af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // ObjCForCollectionStmts are processed in two places. This method 1821af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // handles the case where an ObjCForCollectionStmt* occurs as one of the 1822af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // statements within a basic block. This transfer function does two things: 1823af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // 1824af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // (1) binds the next container value to 'element'. This creates a new 1825af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // node in the ExplodedGraph. 1826af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // 1827af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // (2) binds the value 0/1 to the ObjCForCollectionStmt* itself, indicating 1828af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // whether or not the container has any more elements. This value 1829af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // will be tested in ProcessBranch. We need to explicitly bind 1830af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // this value because a container can contain nil elements. 18311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // 1832af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // FIXME: Eventually this logic should actually do dispatches to 1833af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // 'countByEnumeratingWithState:objects:count:' (NSFastEnumeration). 1834af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // This will require simulating a temporary NSFastEnumerationState, either 1835af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // through an SVal or through the use of MemRegions. This value can 1836af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // be affixed to the ObjCForCollectionStmt* instead of 0/1; when the loop 1837af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // terminates we reclaim the temporary (it goes out of scope) and we 1838af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // we can test if the SVal is 0 or if the MemRegion is null (depending 1839af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // on what approach we take). 1840af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // 1841af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // For now: simulate (1) by assigning either a symbol or nil if the 1842af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // container is empty. Thus this transfer function will by default 1843af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // result in state splitting. 18441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 184503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Stmt* elem = S->getElement(); 184606fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek SVal ElementV; 18471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 184803509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const DeclStmt* DS = dyn_cast<DeclStmt>(elem)) { 184903509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const VarDecl* ElemD = cast<VarDecl>(DS->getSingleDecl()); 1850af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek assert (ElemD->getInit() == 0); 1851d17da2b99f323fa91b01e1dd119cc32e0ee8197dTed Kremenek ElementV = GetState(Pred)->getLValue(ElemD, Pred->getLocationContext()); 185206fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek VisitObjCForCollectionStmtAux(S, Pred, Dst, ElementV); 185306fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek return; 1854af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek } 185506fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 1856031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 1857892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(cast<Expr>(elem), Pred, Tmp); 1858031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I = Tmp.begin(), E = Tmp.end(); I!=E; ++I) { 185906fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek const GRState* state = GetState(*I); 18601397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek VisitObjCForCollectionStmtAux(S, *I, Dst, state->getSVal(elem)); 186106fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek } 186206fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek} 186306fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 1864d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitObjCForCollectionStmtAux(const ObjCForCollectionStmt* S, 1865b317f8f5ca8737a5bbad97a3f7566a2dbd2ed61bZhongxing Xu ExplodedNode* Pred, ExplodedNodeSet& Dst, 186606fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek SVal ElementV) { 186706fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 1868b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // Check if the location we are writing back to is a null pointer. 186903509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Stmt* elem = S->getElement(); 1870b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ExplodedNodeSet Tmp; 18719c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLocation(Tmp, elem, Pred, GetState(Pred), ElementV, NULL, false); 1872b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1873b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (Tmp.empty()) 187406fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek return; 1875b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1876b4b817d704287836b52b34369009e682f208aa2bTed Kremenek for (ExplodedNodeSet::iterator NI=Tmp.begin(), NE=Tmp.end(); NI!=NE; ++NI) { 1877b4b817d704287836b52b34369009e682f208aa2bTed Kremenek Pred = *NI; 1878b4b817d704287836b52b34369009e682f208aa2bTed Kremenek const GRState *state = GetState(Pred); 1879b4b817d704287836b52b34369009e682f208aa2bTed Kremenek 1880b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // Handle the case where the container still has elements. 1881c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal TrueV = svalBuilder.makeTruthVal(1); 1882b4b817d704287836b52b34369009e682f208aa2bTed Kremenek const GRState *hasElems = state->BindExpr(S, TrueV); 1883b4b817d704287836b52b34369009e682f208aa2bTed Kremenek 1884b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // Handle the case where the container has no elements. 1885c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal FalseV = svalBuilder.makeTruthVal(0); 1886b4b817d704287836b52b34369009e682f208aa2bTed Kremenek const GRState *noElems = state->BindExpr(S, FalseV); 1887b4b817d704287836b52b34369009e682f208aa2bTed Kremenek 1888b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (loc::MemRegionVal* MV = dyn_cast<loc::MemRegionVal>(&ElementV)) 1889b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (const TypedRegion* R = dyn_cast<TypedRegion>(MV->getRegion())) { 1890b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // FIXME: The proper thing to do is to really iterate over the 1891b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // container. We will do this with dispatch logic to the store. 1892b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // For now, just 'conjure' up a symbolic value. 1893018220c343c103b7dfaa117a7a474c7a7fd6d068Zhongxing Xu QualType T = R->getValueType(); 18947dfc9420babe83e236a47e752f8723bd06070d9dZhanyong Wan assert(Loc::isLocType(T)); 1895b4b817d704287836b52b34369009e682f208aa2bTed Kremenek unsigned Count = Builder->getCurrentBlockCount(); 1896b4b817d704287836b52b34369009e682f208aa2bTed Kremenek SymbolRef Sym = SymMgr.getConjuredSymbol(elem, T, Count); 1897c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.makeLoc(Sym); 1898b4b817d704287836b52b34369009e682f208aa2bTed Kremenek hasElems = hasElems->bindLoc(ElementV, V); 1899b4b817d704287836b52b34369009e682f208aa2bTed Kremenek 1900b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // Bind the location to 'nil' on the false branch. 1901c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal nilV = svalBuilder.makeIntVal(0, T); 1902b4b817d704287836b52b34369009e682f208aa2bTed Kremenek noElems = noElems->bindLoc(ElementV, nilV); 1903b4b817d704287836b52b34369009e682f208aa2bTed Kremenek } 19041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1905b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // Create the new nodes. 1906b4b817d704287836b52b34369009e682f208aa2bTed Kremenek MakeNode(Dst, S, Pred, hasElems); 1907b4b817d704287836b52b34369009e682f208aa2bTed Kremenek MakeNode(Dst, S, Pred, noElems); 1908b4b817d704287836b52b34369009e682f208aa2bTed Kremenek } 1909af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek} 1910af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek 1911af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek//===----------------------------------------------------------------------===// 1912e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Transfer function: Objective-C message expressions. 1913e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1914e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 1915b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremeneknamespace { 1916b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenekclass ObjCMsgWLItem { 1917b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenekpublic: 191803509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ObjCMessageExpr::const_arg_iterator I; 1919b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNode *N; 1920b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 192103509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ObjCMsgWLItem(const ObjCMessageExpr::const_arg_iterator &i, ExplodedNode *n) 1922b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek : I(i), N(n) {} 1923b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek}; 1924b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek} // end anonymous namespace 1925b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1926d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitObjCMessageExpr(const ObjCMessageExpr* ME, 192703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ExplodedNode* Pred, 1928892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet& Dst){ 19291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1930b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Create a worklist to process both the arguments. 1931b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek llvm::SmallVector<ObjCMsgWLItem, 20> WL; 1932e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 1933b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // But first evaluate the receiver (if any). 193403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ObjCMessageExpr::const_arg_iterator AI = ME->arg_begin(), AE = ME->arg_end(); 193503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const Expr *Receiver = ME->getInstanceReceiver()) { 1936b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNodeSet Tmp; 1937b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek Visit(Receiver, Pred, Tmp); 19381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1939b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek if (Tmp.empty()) 1940b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek return; 19411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1942b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) 1943b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek WL.push_back(ObjCMsgWLItem(AI, *I)); 1944b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek } 1945b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek else 1946b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek WL.push_back(ObjCMsgWLItem(AI, Pred)); 19471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1948b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Evaluate the arguments. 1949b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNodeSet ArgsEvaluated; 1950b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek while (!WL.empty()) { 1951b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ObjCMsgWLItem Item = WL.back(); 1952b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek WL.pop_back(); 19531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1954b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek if (Item.I == AE) { 1955b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ArgsEvaluated.insert(Item.N); 1956b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek continue; 1957e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 19581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1959b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Evaluate the subexpression. 1960b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNodeSet Tmp; 19611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1962b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // FIXME: [Objective-C++] handle arguments that are references 1963b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek Visit(*Item.I, Item.N, Tmp); 19641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1965b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Enqueue evaluating the next argument on the worklist. 1966b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ++(Item.I); 1967b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek for (ExplodedNodeSet::iterator NI=Tmp.begin(), NE=Tmp.end(); NI!=NE; ++NI) 1968b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek WL.push_back(ObjCMsgWLItem(Item.I, *NI)); 1969b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek } 1970e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 19715286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis // Now that the arguments are processed, handle the ObjC message. 19725286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis VisitObjCMessage(ME, ArgsEvaluated, Dst); 19735286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis} 19745286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis 19755286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidisvoid ExprEngine::VisitObjCMessage(const ObjCMessage &msg, 19765286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis ExplodedNodeSet &Src, ExplodedNodeSet& Dst) { 19775286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis 19785286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis // Handle the previsits checks. 1979b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNodeSet DstPrevisit; 1980eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreObjCMessage(DstPrevisit, Src, msg,*this); 19811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1982b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Proceed with evaluate the message expression. 19839c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek ExplodedNodeSet dstEval; 19841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1985b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek for (ExplodedNodeSet::iterator DI = DstPrevisit.begin(), 1986b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek DE = DstPrevisit.end(); DI != DE; ++DI) { 198738ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek 19885286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis ExplodedNode *Pred = *DI; 1989c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek bool RaisesException = false; 19909c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek unsigned oldSize = dstEval.size(); 199138ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek SaveAndRestore<bool> OldSink(Builder->BuildSinks); 1992b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek SaveOr OldHasGen(Builder->hasGeneratedNode); 19931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19945286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis if (const Expr *Receiver = msg.getInstanceReceiver()) { 199559fea60cc3dde7a14eeafab9469cb911023fdd7fZhongxing Xu const GRState *state = GetState(Pred); 19962b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis SVal recVal = state->getSVal(Receiver); 19972b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis if (!recVal.isUndef()) { 19982b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // Bifurcate the state into nil and non-nil ones. 19992b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis DefinedOrUnknownSVal receiverVal = cast<DefinedOrUnknownSVal>(recVal); 20002b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis 20012b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis const GRState *notNilState, *nilState; 20022b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis llvm::tie(notNilState, nilState) = state->assume(receiverVal); 20032b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis 20042b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // There are three cases: can be nil or non-nil, must be nil, must be 2005eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // non-nil. We ignore must be nil, and merge the rest two into non-nil. 20062b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis if (nilState && !notNilState) { 2007eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis dstEval.insert(Pred); 20082b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis continue; 20092b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis } 20102b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis 20112b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // Check if the "raise" message was sent. 20122b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis assert(notNilState); 20132b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis if (msg.getSelector() == RaiseSel) 20142b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis RaisesException = true; 20152b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis 20162b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // Check if we raise an exception. For now treat these as sinks. 20172b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // Eventually we will want to handle exceptions properly. 20182b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis if (RaisesException) 20192b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis Builder->BuildSinks = true; 20202b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis 20212b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // Dispatch to plug-in transfer function. 20222b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis evalObjCMessage(dstEval, msg, Pred, notNilState); 2023a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu } 202421fe8370f660a30e3a0493c74728dcb369b9c58bTed Kremenek } 20255286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis else if (const ObjCInterfaceDecl *Iface = msg.getReceiverInterface()) { 202604badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor IdentifierInfo* ClsName = Iface->getIdentifier(); 20275286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis Selector S = msg.getSelector(); 20281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2029c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek // Check for special instance methods. 2030c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek if (!NSExceptionII) { 2031c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek ASTContext& Ctx = getContext(); 2032c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek NSExceptionII = &Ctx.Idents.get("NSException"); 2033c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek } 20341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2035c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek if (ClsName == NSExceptionII) { 2036c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek enum { NUM_RAISE_SELECTORS = 2 }; 20371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2038c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek // Lazily create a cache of the selectors. 2039c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek if (!NSExceptionInstanceRaiseSelectors) { 2040c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek ASTContext& Ctx = getContext(); 2041b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek NSExceptionInstanceRaiseSelectors = 2042b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek new Selector[NUM_RAISE_SELECTORS]; 2043c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek llvm::SmallVector<IdentifierInfo*, NUM_RAISE_SELECTORS> II; 2044c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek unsigned idx = 0; 20451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2046c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek // raise:format: 2047c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek II.push_back(&Ctx.Idents.get("raise")); 2048c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek II.push_back(&Ctx.Idents.get("format")); 2049c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek NSExceptionInstanceRaiseSelectors[idx++] = 2050c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek Ctx.Selectors.getSelector(II.size(), &II[0]); 20511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2052c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek // raise:format::arguments: 2053c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek II.push_back(&Ctx.Idents.get("arguments")); 2054c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek NSExceptionInstanceRaiseSelectors[idx++] = 2055c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek Ctx.Selectors.getSelector(II.size(), &II[0]); 2056c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek } 20571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2058c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek for (unsigned i = 0; i < NUM_RAISE_SELECTORS; ++i) 2059c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek if (S == NSExceptionInstanceRaiseSelectors[i]) { 206038ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek RaisesException = true; 206138ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek break; 2062c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek } 2063e448ab4f9dd162802f5d7cfea60f7830cc61c654Ted Kremenek } 20641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2065a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu // Check if we raise an exception. For now treat these as sinks. 2066a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu // Eventually we will want to handle exceptions properly. 2067a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu if (RaisesException) 2068a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu Builder->BuildSinks = true; 20691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2070a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu // Dispatch to plug-in transfer function. 20715286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis evalObjCMessage(dstEval, msg, Pred, Builder->GetState(Pred)); 2072a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu } 2073b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 207438ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek // Handle the case where no nodes where generated. Auto-generate that 207538ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek // contains the updated state if we aren't generating sinks. 20769c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek if (!Builder->BuildSinks && dstEval.size() == oldSize && 2077b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek !Builder->hasGeneratedNode) 20785286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis MakeNode(dstEval, msg.getOriginExpr(), Pred, GetState(Pred)); 2079c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek } 20801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 208138ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek // Finally, perform the post-condition check of the ObjCMessageExpr and store 208238ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek // the created nodes in 'Dst'. 2083eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPostObjCMessage(Dst, dstEval, msg, *this); 2084de43424560f1a744de6214dab6bbee28ad8437f5Ted Kremenek} 2085de43424560f1a744de6214dab6bbee28ad8437f5Ted Kremenek 2086e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 2087e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Transfer functions: Miscellaneous statements. 2088e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 2089e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 2090d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitCast(const CastExpr *CastE, const Expr *Ex, 2091d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNode *Pred, ExplodedNodeSet &Dst) { 2092892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek 2093031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet S1; 2094892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(Ex, Pred, S1); 2095892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet S2; 2096eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(S2, S1, CastE, *this); 2097892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek 209814429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis if (CastE->getCastKind() == CK_LValueToRValue || 209914429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis CastE->getCastKind() == CK_GetObjCProperty) { 2100892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek for (ExplodedNodeSet::iterator I = S2.begin(), E = S2.end(); I!=E; ++I) { 2101892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNode *subExprNode = *I; 2102892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const GRState *state = GetState(subExprNode); 2103892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek evalLoad(Dst, CastE, subExprNode, state, state->getSVal(Ex)); 2104892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 2105892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek return; 2106892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 2107892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek 2108892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // All other casts. 21095d3003a9d10cc6da4ef716c350bf53c187774c93Ted Kremenek QualType T = CastE->getType(); 2110933c3e1dca3bb88bf113290ef0ade8f5262a89c0Zhongxing Xu QualType ExTy = Ex->getType(); 2111ed340f7d26b3a8fedeb2aebeb5b23429e79d18e0Zhongxing Xu 2112d3118bd7daed36417c8e8bdb0390495a4c829d86Zhongxing Xu if (const ExplicitCastExpr *ExCast=dyn_cast_or_null<ExplicitCastExpr>(CastE)) 211349badde06e066d058d6c7fcf4e628a72999b65a9Douglas Gregor T = ExCast->getTypeAsWritten(); 2114b79b117d3b76da58b14ef835ccfcf2e988b7345fZhongxing Xu 211594ae8fd470471134114599ccfc2301da05719212Ted Kremenek for (ExplodedNodeSet::iterator I = S2.begin(), E = S2.end(); I != E; ++I) { 211694ae8fd470471134114599ccfc2301da05719212Ted Kremenek Pred = *I; 21174fd56816e0925c04f2c92e75399f5c9018d5d6fbZhongxing Xu 211894ae8fd470471134114599ccfc2301da05719212Ted Kremenek switch (CastE->getCastKind()) { 211994ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_ToVoid: 212094ae8fd470471134114599ccfc2301da05719212Ted Kremenek Dst.Add(Pred); 212194ae8fd470471134114599ccfc2301da05719212Ted Kremenek continue; 212294ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_LValueToRValue: 212394ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_NoOp: 212494ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FunctionToPointerDecay: { 212594ae8fd470471134114599ccfc2301da05719212Ted Kremenek // Copy the SVal of Ex to CastE. 212694ae8fd470471134114599ccfc2301da05719212Ted Kremenek const GRState *state = GetState(Pred); 212794ae8fd470471134114599ccfc2301da05719212Ted Kremenek SVal V = state->getSVal(Ex); 212894ae8fd470471134114599ccfc2301da05719212Ted Kremenek state = state->BindExpr(CastE, V); 212994ae8fd470471134114599ccfc2301da05719212Ted Kremenek MakeNode(Dst, CastE, Pred, state); 213094ae8fd470471134114599ccfc2301da05719212Ted Kremenek continue; 213194ae8fd470471134114599ccfc2301da05719212Ted Kremenek } 213294ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_GetObjCProperty: 213394ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_Dependent: 213494ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_ArrayToPointerDecay: 213594ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_BitCast: 213694ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_LValueBitCast: 213794ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralCast: 213894ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_NullToPointer: 213994ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralToPointer: 214094ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_PointerToIntegral: 214194ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_PointerToBoolean: 214294ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralToBoolean: 214394ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralToFloating: 214494ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingToIntegral: 214594ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingToBoolean: 214694ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingCast: 214794ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingRealToComplex: 214894ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingComplexToReal: 214994ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingComplexToBoolean: 215094ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingComplexCast: 215194ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingComplexToIntegralComplex: 215294ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralRealToComplex: 215394ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralComplexToReal: 215494ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralComplexToBoolean: 215594ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralComplexCast: 215694ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralComplexToFloatingComplex: 215794ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_AnyPointerToObjCPointerCast: 215894ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_AnyPointerToBlockPointerCast: 215994ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_ObjCObjectLValueCast: { 216094ae8fd470471134114599ccfc2301da05719212Ted Kremenek // Delegate to SValBuilder to process. 216194ae8fd470471134114599ccfc2301da05719212Ted Kremenek const GRState* state = GetState(Pred); 216294ae8fd470471134114599ccfc2301da05719212Ted Kremenek SVal V = state->getSVal(Ex); 216394ae8fd470471134114599ccfc2301da05719212Ted Kremenek V = svalBuilder.evalCast(V, T, ExTy); 216494ae8fd470471134114599ccfc2301da05719212Ted Kremenek state = state->BindExpr(CastE, V); 216594ae8fd470471134114599ccfc2301da05719212Ted Kremenek MakeNode(Dst, CastE, Pred, state); 216694ae8fd470471134114599ccfc2301da05719212Ted Kremenek continue; 216794ae8fd470471134114599ccfc2301da05719212Ted Kremenek } 216894ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_DerivedToBase: 216994ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_UncheckedDerivedToBase: { 217094ae8fd470471134114599ccfc2301da05719212Ted Kremenek // For DerivedToBase cast, delegate to the store manager. 217194ae8fd470471134114599ccfc2301da05719212Ted Kremenek const GRState *state = GetState(Pred); 217294ae8fd470471134114599ccfc2301da05719212Ted Kremenek SVal val = state->getSVal(Ex); 217394ae8fd470471134114599ccfc2301da05719212Ted Kremenek val = getStoreManager().evalDerivedToBase(val, T); 217494ae8fd470471134114599ccfc2301da05719212Ted Kremenek state = state->BindExpr(CastE, val); 217594ae8fd470471134114599ccfc2301da05719212Ted Kremenek MakeNode(Dst, CastE, Pred, state); 217694ae8fd470471134114599ccfc2301da05719212Ted Kremenek continue; 217794ae8fd470471134114599ccfc2301da05719212Ted Kremenek } 217894ae8fd470471134114599ccfc2301da05719212Ted Kremenek // Various C++ casts that are not handled yet. 21791de4d4e8cb2e9c88809fea8092bc6e835a5473d2John McCall case CK_ResolveUnknownAnyType: 21801de4d4e8cb2e9c88809fea8092bc6e835a5473d2John McCall case CK_Dynamic: 218194ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_ToUnion: 218294ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_BaseToDerived: 218394ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_NullToMemberPointer: 218494ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_BaseToDerivedMemberPointer: 218594ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_DerivedToBaseMemberPointer: 218694ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_UserDefinedConversion: 218794ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_ConstructorConversion: 218894ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_VectorSplat: 218994ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_MemberPointerToBoolean: { 219094ae8fd470471134114599ccfc2301da05719212Ted Kremenek // Recover some path-sensitivty by conjuring a new value. 219194ae8fd470471134114599ccfc2301da05719212Ted Kremenek QualType resultType = CastE->getType(); 219294ae8fd470471134114599ccfc2301da05719212Ted Kremenek if (CastE->isLValue()) 219394ae8fd470471134114599ccfc2301da05719212Ted Kremenek resultType = getContext().getPointerType(resultType); 219494ae8fd470471134114599ccfc2301da05719212Ted Kremenek 219594ae8fd470471134114599ccfc2301da05719212Ted Kremenek SVal result = 219694ae8fd470471134114599ccfc2301da05719212Ted Kremenek svalBuilder.getConjuredSymbolVal(NULL, CastE, resultType, 219794ae8fd470471134114599ccfc2301da05719212Ted Kremenek Builder->getCurrentBlockCount()); 219894ae8fd470471134114599ccfc2301da05719212Ted Kremenek 219994ae8fd470471134114599ccfc2301da05719212Ted Kremenek const GRState *state = GetState(Pred)->BindExpr(CastE, result); 220094ae8fd470471134114599ccfc2301da05719212Ted Kremenek MakeNode(Dst, CastE, Pred, state); 220194ae8fd470471134114599ccfc2301da05719212Ted Kremenek continue; 220294ae8fd470471134114599ccfc2301da05719212Ted Kremenek } 22034fd56816e0925c04f2c92e75399f5c9018d5d6fbZhongxing Xu } 2204874d63fc63387365a21775a14c01963b10fde689Ted Kremenek } 22059de04c4415bd31c0c0e888e9ad5673f6c972e12eTed Kremenek} 22069de04c4415bd31c0c0e888e9ad5673f6c972e12eTed Kremenek 2207d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitCompoundLiteralExpr(const CompoundLiteralExpr* CL, 22081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ExplodedNode* Pred, 2209892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet& Dst) { 221003509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const InitListExpr* ILE 221103509aea098772644bf4662dc1c88634818ceeccZhongxing Xu = cast<InitListExpr>(CL->getInitializer()->IgnoreParens()); 2212031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 22134f09027385466f1f4c382c80ca77157e2aef97d9Ted Kremenek Visit(ILE, Pred, Tmp); 22141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2215031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I = Tmp.begin(), EI = Tmp.end(); I!=EI; ++I) { 2216a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 22171397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal ILV = state->getSVal(ILE); 221867d1287035767f4f6c8ca0c2bb755990012a44caTed Kremenek const LocationContext *LC = (*I)->getLocationContext(); 221967d1287035767f4f6c8ca0c2bb755990012a44caTed Kremenek state = state->bindCompoundLiteral(CL, LC, ILV); 22204f09027385466f1f4c382c80ca77157e2aef97d9Ted Kremenek 2221892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (CL->isLValue()) { 222267d1287035767f4f6c8ca0c2bb755990012a44caTed Kremenek MakeNode(Dst, CL, *I, state->BindExpr(CL, state->getLValue(CL, LC))); 222367d1287035767f4f6c8ca0c2bb755990012a44caTed Kremenek } 2224f22679e3e5d5f5754931952e58112b4c863a4137Zhongxing Xu else 22258e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, CL, *I, state->BindExpr(CL, ILV)); 22264f09027385466f1f4c382c80ca77157e2aef97d9Ted Kremenek } 22274f09027385466f1f4c382c80ca77157e2aef97d9Ted Kremenek} 22284f09027385466f1f4c382c80ca77157e2aef97d9Ted Kremenek 2229d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitDeclStmt(const DeclStmt *DS, ExplodedNode *Pred, 22301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ExplodedNodeSet& Dst) { 22315b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek 22321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // The CFG has one DeclStmt per Decl. 223303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Decl* D = *DS->decl_begin(); 22341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2235e6c62e3d43728b0a4477fffd543723dd2170af1aTed Kremenek if (!D || !isa<VarDecl>(D)) 22365b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek return; 22371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const VarDecl* VD = dyn_cast<VarDecl>(D); 22391f19124c70093d2ef0c06eed63ca6080611800a3Zhongxing Xu const Expr* InitEx = VD->getInit(); 22405b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek 22415b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek // FIXME: static variables may have an initializer, but the second 22425b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek // time a function is called those values may not be current. 2243031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 22445b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek 2245f45fbad13ee1f143a2cb6e806fefe22b48f68940Zhongxing Xu if (InitEx) { 2246f45fbad13ee1f143a2cb6e806fefe22b48f68940Zhongxing Xu if (VD->getType()->isReferenceType() && !InitEx->isLValue()) { 224705e539175d9bac678fca8e77665e88b685729850Zhongxing Xu // If the initializer is C++ record type, it should already has a 224805e539175d9bac678fca8e77665e88b685729850Zhongxing Xu // temp object. 224905e539175d9bac678fca8e77665e88b685729850Zhongxing Xu if (!InitEx->getType()->isRecordType()) 225005e539175d9bac678fca8e77665e88b685729850Zhongxing Xu CreateCXXTemporaryObject(InitEx, Pred, Tmp); 225105e539175d9bac678fca8e77665e88b685729850Zhongxing Xu else 225205e539175d9bac678fca8e77665e88b685729850Zhongxing Xu Tmp.Add(Pred); 2253f45fbad13ee1f143a2cb6e806fefe22b48f68940Zhongxing Xu } else 2254f45fbad13ee1f143a2cb6e806fefe22b48f68940Zhongxing Xu Visit(InitEx, Pred, Tmp); 2255f45fbad13ee1f143a2cb6e806fefe22b48f68940Zhongxing Xu } else 2256e6c62e3d43728b0a4477fffd543723dd2170af1aTed Kremenek Tmp.Add(Pred); 22571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2258ae1623345aed43dcd2e069970a00618378a37b34Ted Kremenek ExplodedNodeSet Tmp2; 2259eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(Tmp2, Tmp, DS, *this); 2260b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 2261ae1623345aed43dcd2e069970a00618378a37b34Ted Kremenek for (ExplodedNodeSet::iterator I=Tmp2.begin(), E=Tmp2.end(); I!=E; ++I) { 22625206f0b913d1a11744c9436c83b24f8daa21152cZhongxing Xu ExplodedNode *N = *I; 2263ae1623345aed43dcd2e069970a00618378a37b34Ted Kremenek const GRState *state = GetState(N); 22641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22655b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek // Decls without InitExpr are not initialized explicitly. 22665206f0b913d1a11744c9436c83b24f8daa21152cZhongxing Xu const LocationContext *LC = N->getLocationContext(); 2267d17da2b99f323fa91b01e1dd119cc32e0ee8197dTed Kremenek 22685b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek if (InitEx) { 22691397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal InitVal = state->getSVal(InitEx); 22701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 227105e539175d9bac678fca8e77665e88b685729850Zhongxing Xu // We bound the temp obj region to the CXXConstructExpr. Now recover 227205e539175d9bac678fca8e77665e88b685729850Zhongxing Xu // the lazy compound value when the variable is not a reference. 227305e539175d9bac678fca8e77665e88b685729850Zhongxing Xu if (AMgr.getLangOptions().CPlusPlus && VD->getType()->isRecordType() && 227405e539175d9bac678fca8e77665e88b685729850Zhongxing Xu !VD->getType()->isReferenceType() && isa<loc::MemRegionVal>(InitVal)){ 227505e539175d9bac678fca8e77665e88b685729850Zhongxing Xu InitVal = state->getSVal(cast<loc::MemRegionVal>(InitVal).getRegion()); 227605e539175d9bac678fca8e77665e88b685729850Zhongxing Xu assert(isa<nonloc::LazyCompoundVal>(InitVal)); 227705e539175d9bac678fca8e77665e88b685729850Zhongxing Xu } 227805e539175d9bac678fca8e77665e88b685729850Zhongxing Xu 22795b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek // Recover some path-sensitivity if a scalar value evaluated to 22805b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek // UnknownVal. 2281a804a68f5a1ad739eb17ff2fd942d12abbc30b08Ted Kremenek if ((InitVal.isUnknown() || 2282a804a68f5a1ad739eb17ff2fd942d12abbc30b08Ted Kremenek !getConstraintManager().canReasonAbout(InitVal)) && 2283a804a68f5a1ad739eb17ff2fd942d12abbc30b08Ted Kremenek !VD->getType()->isReferenceType()) { 2284c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek InitVal = svalBuilder.getConjuredSymbolVal(NULL, InitEx, 22855206f0b913d1a11744c9436c83b24f8daa21152cZhongxing Xu Builder->getCurrentBlockCount()); 22861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 2287b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 22889c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalBind(Dst, DS, *I, state, 2289b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek loc::MemRegionVal(state->getRegion(VD, LC)), InitVal, true); 22901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 22915b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek else { 2292f6f56d4fc8ebce17e7b83eb2c35f57a055c22283Ted Kremenek state = state->bindDeclWithNoInit(state->getRegion(VD, LC)); 22935b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek MakeNode(Dst, DS, *I, state); 22945b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek } 22955b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek } 22965b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek} 2297f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek 2298f75b186893b3461610668dbb627d6f95abead973Ted Kremeneknamespace { 2299f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // This class is used by VisitInitListExpr as an item in a worklist 2300f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // for processing the values contained in an InitListExpr. 2301ba5fb5a955c896815c439289fc51c03cf0635129Kovarththanan Rajaratnamclass InitListWLItem { 2302f75b186893b3461610668dbb627d6f95abead973Ted Kremenekpublic: 2303f75b186893b3461610668dbb627d6f95abead973Ted Kremenek llvm::ImmutableList<SVal> Vals; 2304031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode* N; 230503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu InitListExpr::const_reverse_iterator Itr; 23061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2307031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu InitListWLItem(ExplodedNode* n, llvm::ImmutableList<SVal> vals, 230803509aea098772644bf4662dc1c88634818ceeccZhongxing Xu InitListExpr::const_reverse_iterator itr) 2309f75b186893b3461610668dbb627d6f95abead973Ted Kremenek : Vals(vals), N(n), Itr(itr) {} 2310f75b186893b3461610668dbb627d6f95abead973Ted Kremenek}; 2311f75b186893b3461610668dbb627d6f95abead973Ted Kremenek} 2312f75b186893b3461610668dbb627d6f95abead973Ted Kremenek 2313f75b186893b3461610668dbb627d6f95abead973Ted Kremenek 2314d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitInitListExpr(const InitListExpr* E, ExplodedNode* Pred, 2315031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet& Dst) { 2316c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 2317a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek const GRState* state = GetState(Pred); 231876dba7b67a36b2d6311e4ad4714df5dbd39dbebeTed Kremenek QualType T = getContext().getCanonicalType(E->getType()); 23191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned NumInitElements = E->getNumInits(); 2320c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 2321fb87b89fc9eb103e19fb8e4b925c23f0bd091b99Douglas Gregor if (T->isArrayType() || T->isRecordType() || T->isVectorType()) { 2322a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek llvm::ImmutableList<SVal> StartVals = getBasicVals().getEmptySValList(); 23231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2324a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek // Handle base case where the initializer has no elements. 2325a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek // e.g: static int* myArray[] = {}; 2326a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek if (NumInitElements == 0) { 2327c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.makeCompoundVal(T, StartVals); 23288e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, E, Pred, state->BindExpr(E, V)); 2329a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek return; 23301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 23311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2332a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek // Create a worklist to process the initializers. 2333a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek llvm::SmallVector<InitListWLItem, 10> WorkList; 23341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump WorkList.reserve(NumInitElements); 23351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump WorkList.push_back(InitListWLItem(Pred, StartVals, E->rbegin())); 233603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu InitListExpr::const_reverse_iterator ItrEnd = E->rend(); 2337cf54959eae25fb3050f41833f0eab91042fb1269Ted Kremenek assert(!(E->rbegin() == E->rend())); 23381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2339a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek // Process the worklist until it is empty. 2340f75b186893b3461610668dbb627d6f95abead973Ted Kremenek while (!WorkList.empty()) { 2341f75b186893b3461610668dbb627d6f95abead973Ted Kremenek InitListWLItem X = WorkList.back(); 2342f75b186893b3461610668dbb627d6f95abead973Ted Kremenek WorkList.pop_back(); 23431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2344031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2345f75b186893b3461610668dbb627d6f95abead973Ted Kremenek Visit(*X.Itr, X.N, Tmp); 23461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 234703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu InitListExpr::const_reverse_iterator NewItr = X.Itr + 1; 2348c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 2349bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu for (ExplodedNodeSet::iterator NI=Tmp.begin(),NE=Tmp.end();NI!=NE;++NI) { 2350f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // Get the last initializer value. 2351f75b186893b3461610668dbb627d6f95abead973Ted Kremenek state = GetState(*NI); 23521397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal InitV = state->getSVal(cast<Expr>(*X.Itr)); 23531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2354f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // Construct the new list of values by prepending the new value to 2355f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // the already constructed list. 2356f75b186893b3461610668dbb627d6f95abead973Ted Kremenek llvm::ImmutableList<SVal> NewVals = 2357f75b186893b3461610668dbb627d6f95abead973Ted Kremenek getBasicVals().consVals(InitV, X.Vals); 23581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2359f75b186893b3461610668dbb627d6f95abead973Ted Kremenek if (NewItr == ItrEnd) { 2360a189dcaf0315ce86e76ea1491e739357b6f3f620Zhongxing Xu // Now we have a list holding all init values. Make CompoundValData. 2361c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.makeCompoundVal(T, NewVals); 2362c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 2363f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // Make final state and node. 23648e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, E, *NI, state->BindExpr(E, V)); 2365f75b186893b3461610668dbb627d6f95abead973Ted Kremenek } 2366f75b186893b3461610668dbb627d6f95abead973Ted Kremenek else { 2367f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // Still some initializer values to go. Push them onto the worklist. 2368f75b186893b3461610668dbb627d6f95abead973Ted Kremenek WorkList.push_back(InitListWLItem(*NI, NewVals, NewItr)); 2369f75b186893b3461610668dbb627d6f95abead973Ted Kremenek } 2370f75b186893b3461610668dbb627d6f95abead973Ted Kremenek } 2371f75b186893b3461610668dbb627d6f95abead973Ted Kremenek } 23721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 23738790307d116eef2c23d665ca75d1e44db232117cTed Kremenek return; 2374c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu } 2375c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 23767dfc9420babe83e236a47e752f8723bd06070d9dZhanyong Wan if (Loc::isLocType(T) || T->isIntegerType()) { 2377c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu assert (E->getNumInits() == 1); 2378031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 237903509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Init = E->getInit(0); 2380c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu Visit(Init, Pred, Tmp); 2381bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu for (ExplodedNodeSet::iterator I=Tmp.begin(), EI=Tmp.end(); I != EI; ++I) { 2382c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu state = GetState(*I); 23831397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek MakeNode(Dst, E, *I, state->BindExpr(E, state->getSVal(Init))); 2384c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu } 2385c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu return; 2386c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu } 2387c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 2388c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu assert(0 && "unprocessed InitListExpr type"); 2389c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu} 2390f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek 2391f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne/// VisitUnaryExprOrTypeTraitExpr - Transfer function for sizeof(type). 2392f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbournevoid ExprEngine::VisitUnaryExprOrTypeTraitExpr( 2393f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne const UnaryExprOrTypeTraitExpr* Ex, 2394031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode* Pred, 2395031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet& Dst) { 23960518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType T = Ex->getTypeOfArgument(); 23971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2398f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (Ex->getKind() == UETT_SizeOf) { 2399f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (!T->isIncompleteType() && !T->isConstantSizeType()) { 2400b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose assert(T->isVariableArrayType() && "Unknown non-constant-sized type."); 2401b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 2402b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // FIXME: Add support for VLA type arguments, not just VLA expressions. 2403b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // When that happens, we should probably refactor VLASizeChecker's code. 2404b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose if (Ex->isArgumentType()) { 2405b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose Dst.Add(Pred); 2406b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose return; 2407b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose } 2408b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 2409b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // Get the size by getting the extent of the sub-expression. 2410b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // First, visit the sub-expression to find its region. 241103509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr *Arg = Ex->getArgumentExpr(); 2412b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose ExplodedNodeSet Tmp; 2413892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(Arg, Pred, Tmp); 2414b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 2415b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 2416b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose const GRState* state = GetState(*I); 2417b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose const MemRegion *MR = state->getSVal(Arg).getAsRegion(); 2418b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 2419b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // If the subexpression can't be resolved to a region, we don't know 2420b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // anything about its size. Just leave the state as is and continue. 2421b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose if (!MR) { 2422b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose Dst.Add(*I); 2423b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose continue; 2424b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose } 2425b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 2426b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // The result is the extent of the VLA. 2427c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal Extent = cast<SubRegion>(MR)->getExtent(svalBuilder); 2428b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose MakeNode(Dst, Ex, *I, state->BindExpr(Ex, Extent)); 2429b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose } 2430b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 243187e8034faf994b1e13143e6e0b5062a38d979d21Ted Kremenek return; 243255f7bcbda37964d3c0e8928d0e50a6e1692b7dceTed Kremenek } 2433c12c5bba6ceb6acd4e51e7a0fc03257da9cfd44eJohn McCall else if (T->getAs<ObjCObjectType>()) { 2434c12c5bba6ceb6acd4e51e7a0fc03257da9cfd44eJohn McCall // Some code tries to take the sizeof an ObjCObjectType, relying that 243555f7bcbda37964d3c0e8928d0e50a6e1692b7dceTed Kremenek // the compiler has laid out its representation. Just report Unknown 24361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // for these. 243761e8e1b84292e882553a47edec830a79606c78f4Ted Kremenek Dst.Add(Pred); 2438f342d1887c9b2ef24d029c0546d536e2277b9976Ted Kremenek return; 243955f7bcbda37964d3c0e8928d0e50a6e1692b7dceTed Kremenek } 244087e8034faf994b1e13143e6e0b5062a38d979d21Ted Kremenek } 2441f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne 2442f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne Expr::EvalResult Result; 2443f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne Ex->Evaluate(Result, getContext()); 2444f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne CharUnits amt = CharUnits::fromQuantity(Result.Val.getInt().getZExtValue()); 24451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 24460e561a3e6755c4f248a8bb05d49071ddf4f2ef7bTed Kremenek MakeNode(Dst, Ex, Pred, 2447b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek GetState(Pred)->BindExpr(Ex, 2448c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.makeIntVal(amt.getQuantity(), Ex->getType()))); 2449469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek} 2450469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek 2451d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitOffsetOfExpr(const OffsetOfExpr* OOE, 245203509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ExplodedNode* Pred, ExplodedNodeSet& Dst) { 24538ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Expr::EvalResult Res; 24548ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (OOE->Evaluate(Res, getContext()) && Res.Val.isInt()) { 24558ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const APSInt &IV = Res.Val.getInt(); 24568ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor assert(IV.getBitWidth() == getContext().getTypeSize(OOE->getType())); 24578ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor assert(OOE->getType()->isIntegerType()); 24588ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor assert(IV.isSigned() == OOE->getType()->isSignedIntegerType()); 2459c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal X = svalBuilder.makeIntVal(IV); 24608ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor MakeNode(Dst, OOE, Pred, GetState(Pred)->BindExpr(OOE, X)); 24618ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return; 24628ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 24638ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor // FIXME: Handle the case where __builtin_offsetof is not a constant. 24648ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Dst.Add(Pred); 24658ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor} 2466d8e9f0dc737133d4e8342f39389064620f5a7f8fTed Kremenek 2467d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitUnaryOperator(const UnaryOperator* U, 246803509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ExplodedNode* Pred, 2469892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet& Dst) { 24701b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 2471d8e9f0dc737133d4e8342f39389064620f5a7f8fTed Kremenek switch (U->getOpcode()) { 24721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2473d8e9f0dc737133d4e8342f39389064620f5a7f8fTed Kremenek default: 2474d8e9f0dc737133d4e8342f39389064620f5a7f8fTed Kremenek break; 24751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 24762de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Real: { 247703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = U->getSubExpr()->IgnoreParens(); 2478031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2479b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek Visit(Ex, Pred, Tmp); 24801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2481031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 24821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 24831c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu // FIXME: We don't have complex SValues yet. 2484b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek if (Ex->getType()->isAnyComplexType()) { 2485b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek // Just report "Unknown." 2486b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek Dst.Add(*I); 2487b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek continue; 2488b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek } 24891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 24902de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall // For all other types, UO_Real is an identity operation. 2491b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek assert (U->getType() == Ex->getType()); 2492a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 24931397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek MakeNode(Dst, U, *I, state->BindExpr(U, state->getSVal(Ex))); 24941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 24951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2496b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek return; 2497b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek } 24981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 24992de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Imag: { 25001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 250103509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = U->getSubExpr()->IgnoreParens(); 2502031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2503b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek Visit(Ex, Pred, Tmp); 25041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2505031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 25061c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu // FIXME: We don't have complex SValues yet. 2507b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek if (Ex->getType()->isAnyComplexType()) { 2508b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek // Just report "Unknown." 2509b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek Dst.Add(*I); 2510b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek continue; 2511b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek } 25121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25132de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall // For all other types, UO_Imag returns 0. 2514a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 2515c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal X = svalBuilder.makeZeroVal(Ex->getType()); 25168e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, U, *I, state->BindExpr(U, X)); 2517b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek } 25181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2519b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek return; 2520b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek } 25218ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 2522892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek case UO_Plus: 2523892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek assert(!U->isLValue()); 2524892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // FALL-THROUGH. 2525892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek case UO_Deref: 25269c2bac02c1d1204bcf2c5a025ab901d09bc7ae26Zhongxing Xu case UO_AddrOf: 25272de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Extension: { 25281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25291b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Unary "+" is a no-op, similar to a parentheses. We still have places 25301b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // where it may be a block-level expression, so we need to 25311b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // generate an extra node that just propagates the value of the 25321b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // subexpression. 25331b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 253403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = U->getSubExpr()->IgnoreParens(); 2535031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2536892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(Ex, Pred, Tmp); 25371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 2539a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 25401397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek MakeNode(Dst, U, *I, state->BindExpr(U, state->getSVal(Ex))); 25411b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 25421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25431b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek return; 25441b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 25451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25462de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_LNot: 25472de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 25482de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Not: { 2549892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek assert (!U->isLValue()); 255003509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = U->getSubExpr()->IgnoreParens(); 2551031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 25521b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek Visit(Ex, Pred, Tmp); 25531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 2555a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 25561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2557855cd903beadc056ea300464b46c6c46b91d290fTed Kremenek // Get the value of the subexpression. 25581397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getSVal(Ex); 2559855cd903beadc056ea300464b46c6c46b91d290fTed Kremenek 2560e04a5cb9afb5faa205c0bfa93103d6df691e05b2Ted Kremenek if (V.isUnknownOrUndef()) { 25618e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, U, *I, state->BindExpr(U, V)); 2562e04a5cb9afb5faa205c0bfa93103d6df691e05b2Ted Kremenek continue; 2563e04a5cb9afb5faa205c0bfa93103d6df691e05b2Ted Kremenek } 25641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 256560595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// QualType DstT = getContext().getCanonicalType(U->getType()); 256660595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// QualType SrcT = getContext().getCanonicalType(Ex->getType()); 25671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump// 256860595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// if (DstT != SrcT) // Perform promotions. 25699c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek// V = evalCast(V, DstT); 25701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump// 257160595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// if (V.isUnknownOrUndef()) { 257260595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// MakeNode(Dst, U, *I, BindExpr(St, U, V)); 257360595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// continue; 257460595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// } 25751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25761b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek switch (U->getOpcode()) { 25771b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek default: 25781b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek assert(false && "Invalid Opcode."); 25791b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek break; 25801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25812de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Not: 258260a6e0ce72a24d6247602625c631fc3dc7bfd8d4Ted Kremenek // FIXME: Do we need to handle promotions? 25839c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek state = state->BindExpr(U, evalComplement(cast<NonLoc>(V))); 25841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump break; 25851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25862de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 258760a6e0ce72a24d6247602625c631fc3dc7bfd8d4Ted Kremenek // FIXME: Do we need to handle promotions? 25889c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek state = state->BindExpr(U, evalMinus(cast<NonLoc>(V))); 25891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump break; 25901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25912de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_LNot: 25921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25931b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // C99 6.5.3.3: "The expression !E is equivalent to (0==E)." 25941b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // 25951b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Note: technically we do "E == 0", but this is the same in the 25961b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // transfer functions as "0 == E". 25976c07bdba93b095b66e2c8c82dd5ed458fa8285eaTed Kremenek SVal Result; 25981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25991c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu if (isa<Loc>(V)) { 2600c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek Loc X = svalBuilder.makeNull(); 26019c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek Result = evalBinOp(state, BO_EQ, cast<Loc>(V), X, 26026c07bdba93b095b66e2c8c82dd5ed458fa8285eaTed Kremenek U->getType()); 26031b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26041b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek else { 260560595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek nonloc::ConcreteInt X(getBasicVals().getValue(0, Ex->getType())); 26069c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek Result = evalBinOp(state, BO_EQ, cast<NonLoc>(V), X, 26076c07bdba93b095b66e2c8c82dd5ed458fa8285eaTed Kremenek U->getType()); 26081b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26108e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek state = state->BindExpr(U, Result); 26111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26121b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek break; 26131b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2615a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek MakeNode(Dst, U, *I, state); 26161b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26181b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek return; 26191b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26207b8009a3e3a1479203d315b74712552a4ce3e200Ted Kremenek } 26212ad886836c3a9111f24144a8fe5da3d72958a01cTed Kremenek 26221b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Handle ++ and -- (both pre- and post-increment). 26231b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek assert (U->isIncrementDecrementOp()); 2624031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 262503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = U->getSubExpr()->IgnoreParens(); 2626892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(Ex, Pred, Tmp); 26271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2628031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I = Tmp.begin(), E = Tmp.end(); I!=E; ++I) { 26291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2630a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 2631250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu SVal loc = state->getSVal(Ex); 26321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Perform a load. 2634031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp2; 2635250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu evalLoad(Tmp2, Ex, *I, state, loc); 2636540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek 2637bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu for (ExplodedNodeSet::iterator I2=Tmp2.begin(), E2=Tmp2.end();I2!=E2;++I2) { 26381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2639a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek state = GetState(*I2); 26401397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V2_untested = state->getSVal(Ex); 26411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Propagate unknown and undefined values. 26435b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek if (V2_untested.isUnknownOrUndef()) { 26445b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek MakeNode(Dst, U, *I2, state->BindExpr(U, V2_untested)); 26451b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek continue; 2646b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek } 26475b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek DefinedSVal V2 = cast<DefinedSVal>(V2_untested); 26481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Handle all other values. 26502de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall BinaryOperator::Opcode Op = U->isIncrementOp() ? BO_Add 26512de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall : BO_Sub; 265221028dd8850c64a414f7a82dfddcc291351203d6Ted Kremenek 2653a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu // If the UnaryOperator has non-location type, use its type to create the 2654a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu // constant value. If the UnaryOperator has location type, create the 2655a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu // constant with int type and pointer width. 2656a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu SVal RHS; 2657a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu 2658a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu if (U->getType()->isAnyPointerType()) 2659a6b0b96e5376cd9cf182a3e240e0537feed43cdeTed Kremenek RHS = svalBuilder.makeArrayIndex(1); 2660a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu else 2661c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek RHS = svalBuilder.makeIntVal(1, U->getType()); 2662a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu 26639c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek SVal Result = evalBinOp(state, Op, V2, RHS, U->getType()); 26641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2665bb9b2711ded08d39f9c9aa08b06ac5e288f32c62Ted Kremenek // Conjure a new symbol if necessary to recover precision. 2666af48fdd35633f53c74e982ba7922ca7b2051c1f5Ted Kremenek if (Result.isUnknown() || !getConstraintManager().canReasonAbout(Result)){ 26675b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek DefinedOrUnknownSVal SymVal = 2668c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.getConjuredSymbolVal(NULL, Ex, 26698780679b02bea5ab6360f3f8ebf3b221aaeda93fTed Kremenek Builder->getCurrentBlockCount()); 26705b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek Result = SymVal; 26711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2672af48fdd35633f53c74e982ba7922ca7b2051c1f5Ted Kremenek // If the value is a location, ++/-- should always preserve 26736c07bdba93b095b66e2c8c82dd5ed458fa8285eaTed Kremenek // non-nullness. Check if the original value was non-null, and if so 26741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // propagate that constraint. 26757dfc9420babe83e236a47e752f8723bd06070d9dZhanyong Wan if (Loc::isLocType(U->getType())) { 26765b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek DefinedOrUnknownSVal Constraint = 2677250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu svalBuilder.evalEQ(state, V2,svalBuilder.makeZeroVal(U->getType())); 26781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 267928f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (!state->assume(Constraint, true)) { 2680af48fdd35633f53c74e982ba7922ca7b2051c1f5Ted Kremenek // It isn't feasible for the original value to be null. 2681af48fdd35633f53c74e982ba7922ca7b2051c1f5Ted Kremenek // Propagate this constraint. 26829c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek Constraint = svalBuilder.evalEQ(state, SymVal, 2683c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.makeZeroVal(U->getType())); 26845b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek 26851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 268628f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek state = state->assume(Constraint, false); 2687a591bc04d21fa62ebffcb2c7814d738ca8f5e2f9Ted Kremenek assert(state); 26881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 26891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 2690af48fdd35633f53c74e982ba7922ca7b2051c1f5Ted Kremenek } 26911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2692250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu // Since the lvalue-to-rvalue conversion is explicit in the AST, 2693250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu // we bind an l-value if the operator is prefix and an lvalue (in C++). 2694b08624414a923e0df93dd7630fee51b0ff3cb7b1Zhongxing Xu if (U->isLValue()) 2695250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu state = state->BindExpr(U, loc); 2696250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu else 2697250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu state = state->BindExpr(U, V2); 26981b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 26991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Perform the store. 2700250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu evalStore(Dst, NULL, U, *I2, state, loc, Result); 27015b6dc2d72bf1bcf2b61fe5dbcd57bfa4aee76b29Ted Kremenek } 2702469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek } 27035b6dc2d72bf1bcf2b61fe5dbcd57bfa4aee76b29Ted Kremenek} 27045b6dc2d72bf1bcf2b61fe5dbcd57bfa4aee76b29Ted Kremenek 2705d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitAsmStmt(const AsmStmt* A, ExplodedNode* Pred, 2706bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu ExplodedNodeSet& Dst) { 2707ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek VisitAsmStmtHelperOutputs(A, A->begin_outputs(), A->end_outputs(), Pred, Dst); 27081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 2709ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek 2710d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitAsmStmtHelperOutputs(const AsmStmt* A, 271103509aea098772644bf4662dc1c88634818ceeccZhongxing Xu AsmStmt::const_outputs_iterator I, 271203509aea098772644bf4662dc1c88634818ceeccZhongxing Xu AsmStmt::const_outputs_iterator E, 2713bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu ExplodedNode* Pred, ExplodedNodeSet& Dst) { 2714ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek if (I == E) { 2715ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek VisitAsmStmtHelperInputs(A, A->begin_inputs(), A->end_inputs(), Pred, Dst); 2716ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek return; 2717ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek } 27181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2719031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2720892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(*I, Pred, Tmp); 2721ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek ++I; 27221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2723bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu for (ExplodedNodeSet::iterator NI = Tmp.begin(), NE = Tmp.end();NI != NE;++NI) 2724ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek VisitAsmStmtHelperOutputs(A, I, E, *NI, Dst); 2725ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek} 2726ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek 2727d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitAsmStmtHelperInputs(const AsmStmt* A, 272803509aea098772644bf4662dc1c88634818ceeccZhongxing Xu AsmStmt::const_inputs_iterator I, 272903509aea098772644bf4662dc1c88634818ceeccZhongxing Xu AsmStmt::const_inputs_iterator E, 2730b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNode* Pred, 2731bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu ExplodedNodeSet& Dst) { 2732ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek if (I == E) { 27331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2734ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek // We have processed both the inputs and the outputs. All of the outputs 27351c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu // should evaluate to Locs. Nuke all of their values. 27361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2737ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek // FIXME: Some day in the future it would be nice to allow a "plug-in" 2738ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek // which interprets the inline asm and stores proper results in the 2739ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek // outputs. 27401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2741a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(Pred); 27421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 274303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu for (AsmStmt::const_outputs_iterator OI = A->begin_outputs(), 2744ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek OE = A->end_outputs(); OI != OE; ++OI) { 27451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 27461397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal X = state->getSVal(*OI); 27471c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu assert (!isa<NonLoc>(X)); // Should be an Lval, or unknown, undef. 27481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 27491c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu if (isa<Loc>(X)) 27503ff12591494a3cb3d3a24427975df58714ac3b2fTed Kremenek state = state->bindLoc(cast<Loc>(X), UnknownVal()); 2751ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek } 27521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2753a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek MakeNode(Dst, A, Pred, state); 2754ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek return; 2755ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek } 27561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2757031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2758ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek Visit(*I, Pred, Tmp); 27591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2760ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek ++I; 27611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2762e1ccccff777f6bad6b25e9c6a762f98fd8003181Ted Kremenek for (ExplodedNodeSet::iterator NI = Tmp.begin(), NE = Tmp.end(); NI!=NE; ++NI) 2763ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek VisitAsmStmtHelperInputs(A, I, E, *NI, Dst); 2764ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek} 2765ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek 2766d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitReturnStmt(const ReturnStmt *RS, ExplodedNode *Pred, 27671053d246f451c399468248625d1146e3d845e21eTed Kremenek ExplodedNodeSet &Dst) { 27681053d246f451c399468248625d1146e3d845e21eTed Kremenek ExplodedNodeSet Src; 276903509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const Expr *RetE = RS->getRetValue()) { 2770bd2b2084e58577f17308f910770a5563a344251aZhongxing Xu // Record the returned expression in the state. It will be used in 2771e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenek // processCallExit to bind the return value to the call expr. 27726190ec29f0895185bbec95a932429b8832917fecZhongxing Xu { 2773b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek static int tag = 0; 27746190ec29f0895185bbec95a932429b8832917fecZhongxing Xu const GRState *state = GetState(Pred); 27756190ec29f0895185bbec95a932429b8832917fecZhongxing Xu state = state->set<ReturnExpr>(RetE); 2776b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek Pred = Builder->generateNode(RetE, state, Pred, &tag); 27776190ec29f0895185bbec95a932429b8832917fecZhongxing Xu } 27786190ec29f0895185bbec95a932429b8832917fecZhongxing Xu // We may get a NULL Pred because we generated a cached node. 27796190ec29f0895185bbec95a932429b8832917fecZhongxing Xu if (Pred) 27806190ec29f0895185bbec95a932429b8832917fecZhongxing Xu Visit(RetE, Pred, Src); 278102737ed29d7fff2206f7c7ee958cdf0665e35542Ted Kremenek } 27821053d246f451c399468248625d1146e3d845e21eTed Kremenek else { 27831053d246f451c399468248625d1146e3d845e21eTed Kremenek Src.Add(Pred); 27841053d246f451c399468248625d1146e3d845e21eTed Kremenek } 2785b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 27861053d246f451c399468248625d1146e3d845e21eTed Kremenek ExplodedNodeSet CheckedSet; 2787eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(CheckedSet, Src, RS, *this); 2788b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 27891053d246f451c399468248625d1146e3d845e21eTed Kremenek for (ExplodedNodeSet::iterator I = CheckedSet.begin(), E = CheckedSet.end(); 27901053d246f451c399468248625d1146e3d845e21eTed Kremenek I != E; ++I) { 27916b31e8ed11721505645860f40486e091ecd23dd0Ted Kremenek 2792d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis assert(Builder && "StmtNodeBuilder must be defined."); 2793b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 27941053d246f451c399468248625d1146e3d845e21eTed Kremenek Pred = *I; 27951053d246f451c399468248625d1146e3d845e21eTed Kremenek unsigned size = Dst.size(); 2796b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 27971053d246f451c399468248625d1146e3d845e21eTed Kremenek SaveAndRestore<bool> OldSink(Builder->BuildSinks); 2798b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek SaveOr OldHasGen(Builder->hasGeneratedNode); 2799b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 28009c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek getTF().evalReturn(Dst, *this, *Builder, RS, Pred); 2801b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 2802b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Handle the case where no nodes where generated. 2803b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek if (!Builder->BuildSinks && Dst.size() == size && 2804b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek !Builder->hasGeneratedNode) 28051053d246f451c399468248625d1146e3d845e21eTed Kremenek MakeNode(Dst, RS, Pred, GetState(Pred)); 28065917d7894e8274b9625275dd4dd86c5d0040a242Ted Kremenek } 280702737ed29d7fff2206f7c7ee958cdf0665e35542Ted Kremenek} 280855deb97341819080d6d127d29e25b9502e4f2e3cTed Kremenek 2809e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 2810e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Transfer functions: Binary operators. 2811e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 2812e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 2813d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitBinaryOperator(const BinaryOperator* B, 2814031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode* Pred, 2815892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet& Dst) { 2816031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp1; 28171b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek Expr* LHS = B->getLHS()->IgnoreParens(); 28181b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek Expr* RHS = B->getRHS()->IgnoreParens(); 28191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2820892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(LHS, Pred, Tmp1); 2821668399b23cf18124c8c8c41a14a7712212f6fa45Zhongxing Xu ExplodedNodeSet Tmp3; 2822668399b23cf18124c8c8c41a14a7712212f6fa45Zhongxing Xu 2823e1ccccff777f6bad6b25e9c6a762f98fd8003181Ted Kremenek for (ExplodedNodeSet::iterator I1=Tmp1.begin(), E1=Tmp1.end(); I1!=E1; ++I1) { 282459fea60cc3dde7a14eeafab9469cb911023fdd7fZhongxing Xu SVal LeftV = GetState(*I1)->getSVal(LHS); 2825031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp2; 28261b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek Visit(RHS, *I1, Tmp2); 28276403b57eda05a22273d920ad0bd2991d11eaa7b8Zhongxing Xu 28286403b57eda05a22273d920ad0bd2991d11eaa7b8Zhongxing Xu ExplodedNodeSet CheckedSet; 2829eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(CheckedSet, Tmp2, B, *this); 28301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 28311b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // With both the LHS and RHS evaluated, process the operation itself. 28321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 28331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ExplodedNodeSet::iterator I2=CheckedSet.begin(), E2=CheckedSet.end(); 28346403b57eda05a22273d920ad0bd2991d11eaa7b8Zhongxing Xu I2 != E2; ++I2) { 2835cf78b6a771bb4537d5ee8fa44e718e842c2f70c7Ted Kremenek 28365b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek const GRState *state = GetState(*I2); 28371397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal RightV = state->getSVal(RHS); 28381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 28395b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek BinaryOperator::Opcode Op = B->getOpcode(); 28401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 28412de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (Op == BO_Assign) { 284273af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // EXPERIMENTAL: "Conjured" symbols. 284373af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // FIXME: Handle structs. 28440e82a936389ead8f22077d5b021cab4ab7bd9899Ted Kremenek if (RightV.isUnknown() ||!getConstraintManager().canReasonAbout(RightV)) 28450e82a936389ead8f22077d5b021cab4ab7bd9899Ted Kremenek { 284673af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu unsigned Count = Builder->getCurrentBlockCount(); 2847c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek RightV = svalBuilder.getConjuredSymbolVal(NULL, B->getRHS(), Count); 2848ab2b8c54bca82866876f91e756788916d3fa20c3Ted Kremenek } 2849662174ca204cb520f634bdcb34a3708f45389d14Zhongxing Xu 2850892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal ExprVal = B->isLValue() ? LeftV : RightV; 2851662174ca204cb520f634bdcb34a3708f45389d14Zhongxing Xu 285273af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // Simulate the effects of a "store": bind the value of the RHS 285373af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // to the L-Value represented by the LHS. 28549c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalStore(Tmp3, B, LHS, *I2, state->BindExpr(B, ExprVal), LeftV,RightV); 285573af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu continue; 285673af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu } 2857b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 285873af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu if (!B->isAssignmentOp()) { 285973af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // Process non-assignments except commas or short-circuited 286073af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // logical expressions (LAnd and LOr). 28619c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek SVal Result = evalBinOp(state, Op, LeftV, RightV, B->getType()); 2862b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 286373af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu if (Result.isUnknown()) { 286496ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek MakeNode(Tmp3, B, *I2, state); 286573af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu continue; 286673af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu } 2867b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 286873af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu state = state->BindExpr(B, Result); 2869b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 2870668399b23cf18124c8c8c41a14a7712212f6fa45Zhongxing Xu MakeNode(Tmp3, B, *I2, state); 287173af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu continue; 28721b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 28731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 28741b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek assert (B->isCompoundAssignmentOp()); 28751b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 2876cad2996edf303978932c621ab02729dc11debb81Ted Kremenek switch (Op) { 2877cad2996edf303978932c621ab02729dc11debb81Ted Kremenek default: 2878cad2996edf303978932c621ab02729dc11debb81Ted Kremenek assert(0 && "Invalid opcode for compound assignment."); 28792de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_MulAssign: Op = BO_Mul; break; 28802de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_DivAssign: Op = BO_Div; break; 28812de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_RemAssign: Op = BO_Rem; break; 28822de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_AddAssign: Op = BO_Add; break; 28832de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_SubAssign: Op = BO_Sub; break; 28842de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_ShlAssign: Op = BO_Shl; break; 28852de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_ShrAssign: Op = BO_Shr; break; 28862de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_AndAssign: Op = BO_And; break; 28872de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_XorAssign: Op = BO_Xor; break; 28882de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_OrAssign: Op = BO_Or; break; 2889934e3e93eface34e73257a4a80cc6752edd588ceTed Kremenek } 28901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 28911b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Perform a load (the LHS). This performs the checks for 28921b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // null dereferences, and so on. 2893c39b2bdd4cef51021fe90de91c9fb6d1a15f4d0aZhongxing Xu ExplodedNodeSet Tmp4; 28941397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal location = state->getSVal(LHS); 28959c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLoad(Tmp4, LHS, *I2, state, location); 28961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2897c39b2bdd4cef51021fe90de91c9fb6d1a15f4d0aZhongxing Xu for (ExplodedNodeSet::iterator I4=Tmp4.begin(), E4=Tmp4.end(); I4!=E4; 2898c39b2bdd4cef51021fe90de91c9fb6d1a15f4d0aZhongxing Xu ++I4) { 2899c39b2bdd4cef51021fe90de91c9fb6d1a15f4d0aZhongxing Xu state = GetState(*I4); 29001397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getSVal(LHS); 29011b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 29021b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Get the computation type. 290332c3fa4195762ba93f0b7114ab36c0941bc34432Ted Kremenek QualType CTy = 290432c3fa4195762ba93f0b7114ab36c0941bc34432Ted Kremenek cast<CompoundAssignOperator>(B)->getComputationResultType(); 290560595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek CTy = getContext().getCanonicalType(CTy); 2906ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman 290732c3fa4195762ba93f0b7114ab36c0941bc34432Ted Kremenek QualType CLHSTy = 290832c3fa4195762ba93f0b7114ab36c0941bc34432Ted Kremenek cast<CompoundAssignOperator>(B)->getComputationLHSType(); 290932c3fa4195762ba93f0b7114ab36c0941bc34432Ted Kremenek CLHSTy = getContext().getCanonicalType(CLHSTy); 2910ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman 291160595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek QualType LTy = getContext().getCanonicalType(LHS->getType()); 2912ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman 2913ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman // Promote LHS. 29149c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek V = svalBuilder.evalCast(V, CLHSTy, LTy); 2915ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman 29161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Compute the result of the operation. 29179c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek SVal Result = svalBuilder.evalCast(evalBinOp(state, Op, V, RightV, CTy), 2918814e6b915450456eb2a1ba15d82fc7f8ae3bc8a6Zhongxing Xu B->getType(), CTy); 29191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29209ff267d0d6b8249a017fca0b56a0c5a6bcb7ef8aTed Kremenek // EXPERIMENTAL: "Conjured" symbols. 29219ff267d0d6b8249a017fca0b56a0c5a6bcb7ef8aTed Kremenek // FIXME: Handle structs. 29221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 292360595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek SVal LHSVal; 29241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29250e82a936389ead8f22077d5b021cab4ab7bd9899Ted Kremenek if (Result.isUnknown() || 29260e82a936389ead8f22077d5b021cab4ab7bd9899Ted Kremenek !getConstraintManager().canReasonAbout(Result)) { 29271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29289ff267d0d6b8249a017fca0b56a0c5a6bcb7ef8aTed Kremenek unsigned Count = Builder->getCurrentBlockCount(); 29291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 293060595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek // The symbolic value is actually for the type of the left-hand side 293160595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek // expression, not the computation type, as this is the value the 293260595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek // LValue on the LHS will bind to. 2933c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek LHSVal = svalBuilder.getConjuredSymbolVal(NULL, B->getRHS(), LTy, Count); 29341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29351c0c23325312df5d40fe788ffcb48484f190e9a3Zhongxing Xu // However, we need to convert the symbol to the computation type. 29369c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek Result = svalBuilder.evalCast(LHSVal, CTy, LTy); 29379ff267d0d6b8249a017fca0b56a0c5a6bcb7ef8aTed Kremenek } 293860595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek else { 293960595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek // The left-hand side may bind to a different value then the 294060595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek // computation type. 29419c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek LHSVal = svalBuilder.evalCast(Result, LTy, CTy); 294260595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek } 29431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2944f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu // In C++, assignment and compound assignment operators return an 2945f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu // lvalue. 2946f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu if (B->isLValue()) 2947f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu state = state->BindExpr(B, location); 2948f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu else 2949f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu state = state->BindExpr(B, Result); 2950f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu 2951f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu evalStore(Tmp3, B, LHS, *I4, state, location, LHSVal); 2952ab2b8c54bca82866876f91e756788916d3fa20c3Ted Kremenek } 2953cb448ca8b372710d48a232fddcec615164eee574Ted Kremenek } 2954d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek } 2955668399b23cf18124c8c8c41a14a7712212f6fa45Zhongxing Xu 2956eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPostStmt(Dst, Tmp3, B, *this); 2957094bef56a7900f13bb777f9a352704104b1458e7Ted Kremenek} 2958094bef56a7900f13bb777f9a352704104b1458e7Ted Kremenek 2959094bef56a7900f13bb777f9a352704104b1458e7Ted Kremenek//===----------------------------------------------------------------------===// 2960e01c98767dfd7153c3c84637c36659e3bbe16ff7Ted Kremenek// Visualization. 2961ee98546b0d5f3439c4a590b0d7d1545af794a0ecTed Kremenek//===----------------------------------------------------------------------===// 2962ee98546b0d5f3439c4a590b0d7d1545af794a0ecTed Kremenek 2963aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek#ifndef NDEBUG 2964d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisstatic ExprEngine* GraphPrintCheckerState; 2965e97ca065c91ff9ca2a2a42eb443eaa553c40441cTed Kremenekstatic SourceManager* GraphPrintSourceManager; 29663b4f6702860208692f6ef28401e68de4e3ff9af9Ted Kremenek 2967aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremeneknamespace llvm { 2968aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenektemplate<> 296947491f8b7adf9d42a404d44c073e8a5308fa6cfcDouglas Gregorstruct DOTGraphTraits<ExplodedNode*> : 2970aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek public DefaultDOTGraphTraits { 2971006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser 2972006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {} 2973006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser 2974d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis // FIXME: Since we do not cache error nodes in ExprEngine now, this does not 2975ec9227fea66c3439991fc84b0d33b0a8b4b8875eZhongxing Xu // work. 2976031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu static std::string getNodeAttributes(const ExplodedNode* N, void*) { 29771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 297810f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#if 0 297910f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // FIXME: Replace with a general scheme to tell if the node is 298010f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // an error node. 2981a3fadfcce5911742801a302cac82d4fe54d5c682Ted Kremenek if (GraphPrintCheckerState->isImplicitNullDeref(N) || 29829dca062461a6244cf0f733346657fa3eee853f9bTed Kremenek GraphPrintCheckerState->isExplicitNullDeref(N) || 29834a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek GraphPrintCheckerState->isUndefDeref(N) || 29844a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek GraphPrintCheckerState->isUndefStore(N) || 29854a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek GraphPrintCheckerState->isUndefControlFlow(N) || 29865e03fcb5420c33207433dd6f800588e256dd9bdbTed Kremenek GraphPrintCheckerState->isUndefResult(N) || 29872ded35a576e3899553ea0ccfcbf5cbdb3d8cf664Ted Kremenek GraphPrintCheckerState->isBadCall(N) || 29882ded35a576e3899553ea0ccfcbf5cbdb3d8cf664Ted Kremenek GraphPrintCheckerState->isUndefArg(N)) 2989a3fadfcce5911742801a302cac82d4fe54d5c682Ted Kremenek return "color=\"red\",style=\"filled\""; 29901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29918cc13ea74fea1c04042a2f4087665bc5182e8408Ted Kremenek if (GraphPrintCheckerState->isNoReturnCall(N)) 29928cc13ea74fea1c04042a2f4087665bc5182e8408Ted Kremenek return "color=\"blue\",style=\"filled\""; 29932055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu#endif 2994a3fadfcce5911742801a302cac82d4fe54d5c682Ted Kremenek return ""; 2995a3fadfcce5911742801a302cac82d4fe54d5c682Ted Kremenek } 29961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2997006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser static std::string getNodeLabel(const ExplodedNode* N, void*){ 29981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 299953ba0b636194dbeaa65a6f85316c9397a0c5298bTed Kremenek std::string sbuf; 300053ba0b636194dbeaa65a6f85316c9397a0c5298bTed Kremenek llvm::raw_string_ostream Out(sbuf); 3001803c9edd06e8f936821525d36b1d8cc131e37d44Ted Kremenek 3002803c9edd06e8f936821525d36b1d8cc131e37d44Ted Kremenek // Program Location. 3003aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek ProgramPoint Loc = N->getLocation(); 30041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3005aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek switch (Loc.getKind()) { 3006aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek case ProgramPoint::BlockEntranceKind: 30071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Out << "Block Entrance: B" 3008aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek << cast<BlockEntrance>(Loc).getBlock()->getBlockID(); 3009aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek break; 30101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3011aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek case ProgramPoint::BlockExitKind: 3012aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek assert (false); 3013aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek break; 30141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3015102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor case ProgramPoint::CallEnterKind: 3016102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor Out << "CallEnter"; 3017102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor break; 3018102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor 3019102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor case ProgramPoint::CallExitKind: 3020102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor Out << "CallExit"; 3021102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor break; 3022102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor 3023aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek default: { 30245f85e17df3f5b0a8021443f2b590daecfb2cbd17Ted Kremenek if (StmtPoint *L = dyn_cast<StmtPoint>(&Loc)) { 30255f85e17df3f5b0a8021443f2b590daecfb2cbd17Ted Kremenek const Stmt* S = L->getStmt(); 30268c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek SourceLocation SLoc = S->getLocStart(); 30278c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek 30281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Out << S->getStmtClassName() << ' ' << (void*) S << ' '; 3029e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner LangOptions LO; // FIXME. 3030e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner S->printPretty(Out, 0, PrintingPolicy(LO)); 30311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 30321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (SLoc.isFileID()) { 30338c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\lline=" 30347da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << GraphPrintSourceManager->getInstantiationLineNumber(SLoc) 30357da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << " col=" 30367da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << GraphPrintSourceManager->getInstantiationColumnNumber(SLoc) 30377da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << "\\l"; 30388c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek } 30391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 30405f85e17df3f5b0a8021443f2b590daecfb2cbd17Ted Kremenek if (isa<PreStmt>(Loc)) 30411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Out << "\\lPreStmt\\l;"; 30425f85e17df3f5b0a8021443f2b590daecfb2cbd17Ted Kremenek else if (isa<PostLoad>(Loc)) 30437090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek Out << "\\lPostLoad\\l;"; 30447090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek else if (isa<PostStore>(Loc)) 30457090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek Out << "\\lPostStore\\l"; 30467090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek else if (isa<PostLValue>(Loc)) 30477090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek Out << "\\lPostLValue\\l"; 30481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 304910f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#if 0 305010f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // FIXME: Replace with a general scheme to determine 305110f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // the name of the check. 30528c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek if (GraphPrintCheckerState->isImplicitNullDeref(N)) 30538c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Implicit-Null Dereference.\\l"; 30548c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isExplicitNullDeref(N)) 30558c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Explicit-Null Dereference.\\l"; 30568c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isUndefDeref(N)) 30578c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Dereference of undefialied value.\\l"; 30588c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isUndefStore(N)) 30598c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Store to Undefined Loc."; 30608c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isUndefResult(N)) 30618c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Result of operation is undefined."; 30628c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isNoReturnCall(N)) 30638c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Call to function marked \"noreturn\"."; 30648c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isBadCall(N)) 30658c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Call to NULL/Undefined."; 30668c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isUndefArg(N)) 30678c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Argument in call is undefined"; 306810f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#endif 30691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 30708c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek break; 30718c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek } 30728c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek 3073aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek const BlockEdge& E = cast<BlockEdge>(Loc); 3074aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek Out << "Edge: (B" << E.getSrc()->getBlockID() << ", B" 3075aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek << E.getDst()->getBlockID() << ')'; 30761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 307703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const Stmt* T = E.getSrc()->getTerminator()) { 30781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3079e97ca065c91ff9ca2a2a42eb443eaa553c40441cTed Kremenek SourceLocation SLoc = T->getLocStart(); 30801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3081b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek Out << "\\|Terminator: "; 3082e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner LangOptions LO; // FIXME. 3083e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner E.getSrc()->printTerminator(Out, LO); 30841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 30859b5551d7f0209cec8b9c555cf70e893940674e5cTed Kremenek if (SLoc.isFileID()) { 30869b5551d7f0209cec8b9c555cf70e893940674e5cTed Kremenek Out << "\\lline=" 30877da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << GraphPrintSourceManager->getInstantiationLineNumber(SLoc) 30887da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << " col=" 30897da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << GraphPrintSourceManager->getInstantiationColumnNumber(SLoc); 30909b5551d7f0209cec8b9c555cf70e893940674e5cTed Kremenek } 30911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3092daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek if (isa<SwitchStmt>(T)) { 309303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Stmt* Label = E.getDst()->getLabel(); 30941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 30951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (Label) { 309603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const CaseStmt* C = dyn_cast<CaseStmt>(Label)) { 3097daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << "\\lcase "; 3098e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner LangOptions LO; // FIXME. 3099e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner C->getLHS()->printPretty(Out, 0, PrintingPolicy(LO)); 31001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 310103509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const Stmt* RHS = C->getRHS()) { 3102daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << " .. "; 3103e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner RHS->printPretty(Out, 0, PrintingPolicy(LO)); 3104daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 31051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3106daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << ":"; 3107daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 3108daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek else { 3109daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek assert (isa<DefaultStmt>(Label)); 3110daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << "\\ldefault:"; 3111daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 3112daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 31131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump else 3114daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << "\\l(implicit) default:"; 3115daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 3116daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek else if (isa<IndirectGotoStmt>(T)) { 3117b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek // FIXME 3118b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 3119b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek else { 3120b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek Out << "\\lCondition: "; 3121b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek if (*E.getSrc()->succ_begin() == E.getDst()) 3122b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek Out << "true"; 3123b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek else 31241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Out << "false"; 3125b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 31261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3127b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek Out << "\\l"; 3128b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 31291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 313010f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#if 0 313110f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // FIXME: Replace with a general scheme to determine 313210f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // the name of the check. 31334a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek if (GraphPrintCheckerState->isUndefControlFlow(N)) { 31344a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek Out << "\\|Control-flow based on\\lUndefined value.\\l"; 31353b4f6702860208692f6ef28401e68de4e3ff9af9Ted Kremenek } 313610f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#endif 3137aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek } 3138aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek } 31391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3140b65be70779bdaf75e91731bfd89362bf4118ae31Ted Kremenek const GRState *state = N->getState(); 31418673a68a8ab55a2bd03f92d636a50e6b0bfad2daTed Kremenek Out << "\\|StateID: " << (void*) state 31428673a68a8ab55a2bd03f92d636a50e6b0bfad2daTed Kremenek << " NodeID: " << (void*) N << "\\|"; 3143c179a7fbb294fe3ff6cf5479f6239a10f39628c7Zhongxing Xu state->printDOT(Out, *N->getLocationContext()->getCFG()); 3144803c9edd06e8f936821525d36b1d8cc131e37d44Ted Kremenek Out << "\\l"; 3145aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek return Out.str(); 3146aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek } 3147aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek}; 31481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} // end llvm namespace 3149aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek#endif 3150aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek 3151ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek#ifndef NDEBUG 31527ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenektemplate <typename ITERATOR> 3153031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing XuExplodedNode* GetGraphNode(ITERATOR I) { return *I; } 31547ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenek 3155031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xutemplate <> ExplodedNode* 3156031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing XuGetGraphNode<llvm::DenseMap<ExplodedNode*, Expr*>::iterator> 3157031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu (llvm::DenseMap<ExplodedNode*, Expr*>::iterator I) { 31587ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenek return I->first; 31597ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenek} 3160ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek#endif 3161ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek 3162d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ViewGraph(bool trim) { 31631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump#ifndef NDEBUG 3164ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek if (trim) { 3165031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu std::vector<ExplodedNode*> Src; 3166940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek 3167940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek // Flush any outstanding reports to make sure we cover all the nodes. 3168940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek // This does not cause them to get displayed. 3169940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek for (BugReporter::iterator I=BR.begin(), E=BR.end(); I!=E; ++I) 3170940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek const_cast<BugType*>(*I)->FlushReports(BR); 3171940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek 3172940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek // Iterate through the reports and get their nodes. 3173404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis for (BugReporter::EQClasses_iterator 3174404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis EI = BR.EQClasses_begin(), EE = BR.EQClasses_end(); EI != EE; ++EI) { 3175404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis BugReportEquivClass& EQ = *EI; 3176404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis const BugReport &R = **EQ.begin(); 3177404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis ExplodedNode *N = const_cast<ExplodedNode*>(R.getErrorNode()); 3178404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis if (N) Src.push_back(N); 3179940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek } 31801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 31817ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenek ViewGraph(&Src[0], &Src[0]+Src.size()); 3182ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek } 3183493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek else { 3184493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintCheckerState = this; 3185493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintSourceManager = &getContext().getSourceManager(); 3186ae6814efb6c41bd0c0f6413d25097105284d5be7Ted Kremenek 3187d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis llvm::ViewGraph(*G.roots_begin(), "ExprEngine"); 31881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3189493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintCheckerState = NULL; 3190493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintSourceManager = NULL; 3191493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek } 3192493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek#endif 3193493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek} 3194493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek 3195d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ViewGraph(ExplodedNode** Beg, ExplodedNode** End) { 3196493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek#ifndef NDEBUG 3197493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintCheckerState = this; 3198493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintSourceManager = &getContext().getSourceManager(); 31991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3200031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu std::auto_ptr<ExplodedGraph> TrimmedG(G.Trim(Beg, End).first); 3201493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek 3202cf118d41f7930a18dce97416ef7834a62642f587Ted Kremenek if (!TrimmedG.get()) 32036cb7c1a43b0c8f739d1f54b7fdae5ede86033496Benjamin Kramer llvm::errs() << "warning: Trimmed ExplodedGraph is empty.\n"; 3204cf118d41f7930a18dce97416ef7834a62642f587Ted Kremenek else 3205d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis llvm::ViewGraph(*TrimmedG->roots_begin(), "TrimmedExprEngine"); 32061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 32073b4f6702860208692f6ef28401e68de4e3ff9af9Ted Kremenek GraphPrintCheckerState = NULL; 3208e97ca065c91ff9ca2a2a42eb443eaa553c40441cTed Kremenek GraphPrintSourceManager = NULL; 3209e01c98767dfd7153c3c84637c36659e3bbe16ff7Ted Kremenek#endif 3210ee98546b0d5f3439c4a590b0d7d1545af794a0ecTed Kremenek} 3211