ExprEngine.cpp revision f85e193739c953358c865005855253af4f68a497
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 159e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenekbool 160e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed KremenekExprEngine::doesInvalidateGlobals(const CallOrObjCMessage &callOrMessage) const 161e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek{ 162e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek if (callOrMessage.isFunctionCall() && !callOrMessage.isCXXCall()) { 163e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek SVal calleeV = callOrMessage.getFunctionCallee(); 164e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek if (const FunctionTextRegion *codeR = 165e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek llvm::dyn_cast_or_null<FunctionTextRegion>(calleeV.getAsRegion())) { 166e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek 167e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek const FunctionDecl *fd = codeR->getDecl(); 168e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek if (const IdentifierInfo *ii = fd->getIdentifier()) { 169e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek llvm::StringRef fname = ii->getName(); 170e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek if (fname == "strlen") 171e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek return false; 172e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek } 173e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek } 174e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek } 175e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek 176e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek // The conservative answer: invalidates globals. 177e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek return true; 178e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek} 179e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek 180e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 181e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Top-level transfer function logic (Dispatcher). 182e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 183e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 1849c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek/// evalAssume - Called by ConstraintManager. Used to call checker-specific 18532a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek/// logic for handling assumptions on symbolic values. 186e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekconst GRState *ExprEngine::processAssume(const GRState *state, SVal cond, 187b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek bool assumption) { 188312dbec867f6b8d6b86fd562c53352cd4db27468Argyrios Kyrtzidis state = getCheckerManager().runCheckersForEvalAssume(state, cond, assumption); 189312dbec867f6b8d6b86fd562c53352cd4db27468Argyrios Kyrtzidis 19072905cfa81cfd126f322c4173f56d332aac5539eJordy Rose // If the state is infeasible at this point, bail out. 19132a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek if (!state) 19232a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek return NULL; 193b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1949c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek return TF->evalAssume(state, cond, assumption); 19532a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek} 19632a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek 197e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekbool ExprEngine::wantsRegionChangeUpdate(const GRState* state) { 198183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis return getCheckerManager().wantsRegionChangeUpdate(state); 199c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose} 200c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose 201c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Roseconst GRState * 202e36de1fe51c39d9161915dd3dbef880954af6476Ted KremenekExprEngine::processRegionChanges(const GRState *state, 20335bdbf40624beba3fc00cb72ab444659939c1a6bTed Kremenek const StoreManager::InvalidatedSymbols *invalidated, 20435bdbf40624beba3fc00cb72ab444659939c1a6bTed Kremenek const MemRegion * const *Begin, 20535bdbf40624beba3fc00cb72ab444659939c1a6bTed Kremenek const MemRegion * const *End) { 20635bdbf40624beba3fc00cb72ab444659939c1a6bTed Kremenek return getCheckerManager().runCheckersForRegionChanges(state, invalidated, 20735bdbf40624beba3fc00cb72ab444659939c1a6bTed Kremenek Begin, End); 208c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose} 209c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose 210e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processEndWorklist(bool hasWorkRemaining) { 21130726c6baee1417307236e854f1474fdb3cedb98Argyrios Kyrtzidis getCheckerManager().runCheckersForEndAnalysis(G, BR, *this); 212ccc263b44c62ce3a02f797a3ddb3d6017cf0e5e4Ted Kremenek} 213ccc263b44c62ce3a02f797a3ddb3d6017cf0e5e4Ted Kremenek 214e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processCFGElement(const CFGElement E, 215d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder& builder) { 2169c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu switch (E.getKind()) { 2173c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::Invalid: 2183c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek llvm_unreachable("Unexpected CFGElement kind."); 2193c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::Statement: 2203c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek ProcessStmt(E.getAs<CFGStmt>()->getStmt(), builder); 2213c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek return; 2223c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::Initializer: 2233c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek ProcessInitializer(E.getAs<CFGInitializer>()->getInitializer(), builder); 2243c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek return; 2253c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::AutomaticObjectDtor: 2263c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::BaseDtor: 2273c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::MemberDtor: 2283c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::TemporaryDtor: 2293c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek ProcessImplicitDtor(*E.getAs<CFGImplicitDtor>(), builder); 2303c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek return; 2319c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu } 2329c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu} 2339c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu 234d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessStmt(const CFGStmt S, StmtNodeBuilder& builder) { 235d767d81290288c030f3be0be1d3e62b9c8df51dcTed Kremenek // Reclaim any unnecessary nodes in the ExplodedGraph. 236d767d81290288c030f3be0be1d3e62b9c8df51dcTed Kremenek G.reclaimRecentlyAllocatedNodes(); 237e3115e257163321ecde429aeae75f1702f099d4cTed Kremenek // Recycle any unused states in the GRStateManager. 238e3115e257163321ecde429aeae75f1702f099d4cTed Kremenek StateMgr.recycleUnusedStates(); 239e3115e257163321ecde429aeae75f1702f099d4cTed Kremenek 2400a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek currentStmt = S.getStmt(); 2410bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek PrettyStackTraceLoc CrashInfo(getContext().getSourceManager(), 2420a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek currentStmt->getLocStart(), 2430bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek "Error evaluating statement"); 2441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 245e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek Builder = &builder; 246b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek EntryNode = builder.getPredecessor(); 2471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Create the cleaned state. 249bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose const LocationContext *LC = EntryNode->getLocationContext(); 2500a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek SymbolReaper SymReaper(LC, currentStmt, SymMgr); 251c179a7fbb294fe3ff6cf5479f6239a10f39628c7Zhongxing Xu 252bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose if (AMgr.shouldPurgeDead()) { 253bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose const GRState *St = EntryNode->getState(); 254183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis getCheckerManager().runCheckersForLiveSymbols(St, SymReaper); 255183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis 256bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose const StackFrameContext *SFC = LC->getCurrentStackFrame(); 257db0594bfc013131f88429add4eb653c285fa94fbTed Kremenek CleanedState = StateMgr.removeDeadBindings(St, SFC, SymReaper); 258bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose } else { 259bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose CleanedState = EntryNode->getState(); 260bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose } 261241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek 26277d7ef8d8a80ccb2ab3d25c80810571e3ab14ee4Ted Kremenek // Process any special transfer function for dead symbols. 263031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 265241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek if (!SymReaper.hasDeadSymbols()) 266846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek Tmp.Add(EntryNode); 26777d7ef8d8a80ccb2ab3d25c80810571e3ab14ee4Ted Kremenek else { 26877d7ef8d8a80ccb2ab3d25c80810571e3ab14ee4Ted Kremenek SaveAndRestore<bool> OldSink(Builder->BuildSinks); 269b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek SaveOr OldHasGen(Builder->hasGeneratedNode); 270846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek 271331b0ac44b9eb0ffcba66b4f3f3f9adb27c2434fTed Kremenek SaveAndRestore<bool> OldPurgeDeadSymbols(Builder->PurgingDeadSymbols); 272331b0ac44b9eb0ffcba66b4f3f3f9adb27c2434fTed Kremenek Builder->PurgingDeadSymbols = true; 2731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2749400613b54bf56c317786d778f58f45f1080d619Zhongxing Xu // FIXME: This should soon be removed. 2759400613b54bf56c317786d778f58f45f1080d619Zhongxing Xu ExplodedNodeSet Tmp2; 2769c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek getTF().evalDeadSymbols(Tmp2, *this, *Builder, EntryNode, 277241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek CleanedState, SymReaper); 278846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek 279eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForDeadSymbols(Tmp, Tmp2, 280183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis SymReaper, currentStmt, *this); 281183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis 282b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek if (!Builder->BuildSinks && !Builder->hasGeneratedNode) 283846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek Tmp.Add(EntryNode); 28477d7ef8d8a80ccb2ab3d25c80810571e3ab14ee4Ted Kremenek } 2851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 286846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek bool HasAutoGenerated = false; 287846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek 288031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 289031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Dst; 2901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Set the cleaned state. 292846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek Builder->SetCleanedState(*I == EntryNode ? CleanedState : GetState(*I)); 2931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Visit the statement. 2950a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek Visit(currentStmt, *I, Dst); 296846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek 297846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek // Do we need to auto-generate a node? We only need to do this to generate 298d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis // a node with a "cleaned" state; CoreEngine will actually handle 2991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // auto-transitions for other cases. 300846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek if (Dst.size() == 1 && *Dst.begin() == EntryNode 301b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek && !Builder->hasGeneratedNode && !HasAutoGenerated) { 302846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek HasAutoGenerated = true; 3030a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek builder.generateNode(currentStmt, GetState(EntryNode), *I); 304846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek } 30577d7ef8d8a80ccb2ab3d25c80810571e3ab14ee4Ted Kremenek } 3061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 307e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // NULL out these variables to cleanup. 308846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek CleanedState = NULL; 309846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek EntryNode = NULL; 310df7533b5e523a3def04b5c33b56361a94dd97d35Ted Kremenek 3110a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek currentStmt = 0; 3121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 313e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek Builder = NULL; 314e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek} 315e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 316d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessInitializer(const CFGInitializer Init, 317d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 3180a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek // We don't set EntryNode and currentStmt. And we don't clean up state. 319cbb67480094b3bcb5b715acd827cbad55e2a204cSean Hunt const CXXCtorInitializer *BMI = Init.getInitializer(); 3209dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 321d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu ExplodedNode *pred = builder.getPredecessor(); 322d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu 323d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu const StackFrameContext *stackFrame = cast<StackFrameContext>(pred->getLocationContext()); 324d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu const CXXConstructorDecl *decl = cast<CXXConstructorDecl>(stackFrame->getDecl()); 325d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu const CXXThisRegion *thisReg = getCXXThisRegion(decl, stackFrame); 326d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu 327d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu SVal thisVal = pred->getState()->getSVal(thisReg); 3289dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 32900eb3f9c5b33e3d99aee1f8b75dd9c9678fdd66bFrancois Pichet if (BMI->isAnyMemberInitializer()) { 3309dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu ExplodedNodeSet Dst; 3319dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 3329dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu // Evaluate the initializer. 333d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu Visit(BMI->getInit(), pred, Dst); 3349dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 3359dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu for (ExplodedNodeSet::iterator I = Dst.begin(), E = Dst.end(); I != E; ++I){ 3369dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu ExplodedNode *Pred = *I; 3379dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu const GRState *state = Pred->getState(); 3389dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 33900eb3f9c5b33e3d99aee1f8b75dd9c9678fdd66bFrancois Pichet const FieldDecl *FD = BMI->getAnyMember(); 3409dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 341d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu SVal FieldLoc = state->getLValue(FD, thisVal); 3429dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu SVal InitVal = state->getSVal(BMI->getInit()); 3439dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu state = state->bindLoc(FieldLoc, InitVal); 3449dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 3459dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu // Use a custom node building process. 346d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu PostInitializer PP(BMI, stackFrame); 3479dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu // Builder automatically add the generated node to the deferred set, 3489dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu // which are processed in the builder's dtor. 3499dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu builder.generateNode(PP, state, Pred); 3509dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu } 351d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu return; 3529dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu } 353d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu 354d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu assert(BMI->isBaseInitializer()); 355d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu 356d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu // Get the base class declaration. 357d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu const CXXConstructExpr *ctorExpr = cast<CXXConstructExpr>(BMI->getInit()); 358d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu 359d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu // Create the base object region. 360d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu SVal baseVal = 361d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu getStoreManager().evalDerivedToBase(thisVal, ctorExpr->getType()); 362d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu const MemRegion *baseReg = baseVal.getAsRegion(); 363d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu assert(baseReg); 364d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu Builder = &builder; 365d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu ExplodedNodeSet dst; 366d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu VisitCXXConstructExpr(ctorExpr, baseReg, pred, dst); 3679c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu} 3689c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu 369d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessImplicitDtor(const CFGImplicitDtor D, 370d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 371b13453bd8a91f331d0910ca95ad52aa41b52f648Zhongxing Xu Builder = &builder; 372b13453bd8a91f331d0910ca95ad52aa41b52f648Zhongxing Xu 3733c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek switch (D.getKind()) { 3744ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu case CFGElement::AutomaticObjectDtor: 3754ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu ProcessAutomaticObjDtor(cast<CFGAutomaticObjDtor>(D), builder); 3764ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu break; 3774ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu case CFGElement::BaseDtor: 3784ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu ProcessBaseDtor(cast<CFGBaseDtor>(D), builder); 3794ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu break; 3804ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu case CFGElement::MemberDtor: 3814ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu ProcessMemberDtor(cast<CFGMemberDtor>(D), builder); 3824ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu break; 3834ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu case CFGElement::TemporaryDtor: 3844ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu ProcessTemporaryDtor(cast<CFGTemporaryDtor>(D), builder); 3854ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu break; 3864ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu default: 3874ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu llvm_unreachable("Unexpected dtor kind."); 3884ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu } 3894ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu} 3904ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu 391d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessAutomaticObjDtor(const CFGAutomaticObjDtor dtor, 392d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 393b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek ExplodedNode *pred = builder.getPredecessor(); 3942210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu const GRState *state = pred->getState(); 3952210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu const VarDecl *varDecl = dtor.getVarDecl(); 3962210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu 3972210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu QualType varType = varDecl->getType(); 3982210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu 3992210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu if (const ReferenceType *refType = varType->getAs<ReferenceType>()) 4002210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu varType = refType->getPointeeType(); 4012210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu 4022210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu const CXXRecordDecl *recordDecl = varType->getAsCXXRecordDecl(); 4032210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu assert(recordDecl && "get CXXRecordDecl fail"); 4042210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu const CXXDestructorDecl *dtorDecl = recordDecl->getDestructor(); 405b13453bd8a91f331d0910ca95ad52aa41b52f648Zhongxing Xu 4062210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu Loc dest = state->getLValue(varDecl, pred->getLocationContext()); 407b13453bd8a91f331d0910ca95ad52aa41b52f648Zhongxing Xu 4082210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu ExplodedNodeSet dstSet; 4092210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu VisitCXXDestructor(dtorDecl, cast<loc::MemRegionVal>(dest).getRegion(), 4102210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu dtor.getTriggerStmt(), pred, dstSet); 4114ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu} 4124ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu 413d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessBaseDtor(const CFGBaseDtor D, 414d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 4154ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu} 4164ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu 417d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessMemberDtor(const CFGMemberDtor D, 418d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 4194ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu} 4204ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu 421d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessTemporaryDtor(const CFGTemporaryDtor D, 422d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 4239c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu} 4249c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu 425d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::Visit(const Stmt* S, ExplodedNode* Pred, 42603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ExplodedNodeSet& Dst) { 4270bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek PrettyStackTraceLoc CrashInfo(getContext().getSourceManager(), 4280bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek S->getLocStart(), 4290bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek "Error evaluating statement"); 4300bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek 431f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall // Expressions to ignore. 432f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall if (const Expr *Ex = dyn_cast<Expr>(S)) 433892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek S = Ex->IgnoreParens(); 434f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall 435e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // FIXME: add metadata to the CFG so that we can disable 436e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // this check when we KNOW that there is no block-level subexpression. 437e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // The motivation is that this check requires a hashtable lookup. 4381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4390a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek if (S != currentStmt && Pred->getLocationContext()->getCFG()->isBlkExpr(S)) { 440e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek Dst.Add(Pred); 441e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek return; 442e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 4431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 444e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek switch (S->getStmtClass()) { 445f85e193739c953358c865005855253af4f68a497John McCall // C++ and ARC stuff we don't support yet. 446f85e193739c953358c865005855253af4f68a497John McCall case Expr::ObjCIndirectCopyRestoreExprClass: 4471b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXBindTemporaryExprClass: 4481b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXCatchStmtClass: 4491b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXDependentScopeMemberExprClass: 450ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith case Stmt::CXXForRangeStmtClass: 4511b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXPseudoDestructorExprClass: 452c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek case Stmt::CXXTemporaryObjectExprClass: 4531b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXThrowExprClass: 4541b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXTryStmtClass: 4551b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXTypeidExprClass: 4569be88403e965cc49af76c9d33d818781d44b333eFrancois Pichet case Stmt::CXXUuidofExprClass: 457c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek case Stmt::CXXUnresolvedConstructExprClass: 458ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor case Stmt::CXXScalarValueInitExprClass: 4591b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::DependentScopeDeclRefExprClass: 4601b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::UnaryTypeTraitExprClass: 4616ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet case Stmt::BinaryTypeTraitExprClass: 46221ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley case Stmt::ArrayTypeTraitExprClass: 463552622067dc45013d240f73952fece703f5e63bdJohn Wiegley case Stmt::ExpressionTraitExprClass: 4641b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::UnresolvedLookupExprClass: 465c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek case Stmt::UnresolvedMemberExprClass: 4666b219d082434394c1ac401390ec1d1967727815aSebastian Redl case Stmt::CXXNoexceptExprClass: 467be230c36e32142cbdcdbe9c97511d097beeecbabDouglas Gregor case Stmt::PackExpansionExprClass: 468c7793c73ba8a343de3f2552d984851985a46f159Douglas Gregor case Stmt::SubstNonTypeTemplateParmPackExprClass: 46928bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley case Stmt::SEHTryStmtClass: 47028bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley case Stmt::SEHExceptStmtClass: 47128bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley case Stmt::SEHFinallyStmtClass: 4721b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek { 473c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek SaveAndRestore<bool> OldSink(Builder->BuildSinks); 474c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek Builder->BuildSinks = true; 475422ab7a49a9a4252dbc6350e49d7a5708337b9c7Ted Kremenek const ExplodedNode *node = MakeNode(Dst, S, Pred, GetState(Pred)); 476422ab7a49a9a4252dbc6350e49d7a5708337b9c7Ted Kremenek Engine.addAbortedBlock(node, Builder->getBlock()); 477c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek break; 478c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek } 4795fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek 4805fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek // We don't handle default arguments either yet, but we can fake it 4815fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek // for now by just skipping them. 4825fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek case Stmt::CXXDefaultArgExprClass: { 4835fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek Dst.Add(Pred); 4845fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek break; 4855fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek } 4865fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek 487f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall case Stmt::ParenExprClass: 488f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall llvm_unreachable("ParenExprs already handled."); 489f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne case Stmt::GenericSelectionExprClass: 490f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne llvm_unreachable("GenericSelectionExprs already handled."); 4911b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // Cases that should never be evaluated simply because they shouldn't 4921b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // appear in the CFG. 4931b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::BreakStmtClass: 4941b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CaseStmtClass: 4951b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CompoundStmtClass: 4961b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ContinueStmtClass: 4971b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::DefaultStmtClass: 4981b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::DoStmtClass: 499d40066b0fb883839a9100e5455e33190b9b8abacTed Kremenek case Stmt::ForStmtClass: 5001b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::GotoStmtClass: 501d40066b0fb883839a9100e5455e33190b9b8abacTed Kremenek case Stmt::IfStmtClass: 5021b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::IndirectGotoStmtClass: 5031b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::LabelStmtClass: 5041b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::NoStmtClass: 5051b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::NullStmtClass: 506d40066b0fb883839a9100e5455e33190b9b8abacTed Kremenek case Stmt::SwitchStmtClass: 507d40066b0fb883839a9100e5455e33190b9b8abacTed Kremenek case Stmt::WhileStmtClass: 5081b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek llvm_unreachable("Stmt should not be in analyzer evaluation loop"); 5091b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek break; 5101b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek 5118ad9cbc518a603176462f1fa1efe389023590082Ted Kremenek case Stmt::GNUNullExprClass: { 512c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek MakeNode(Dst, S, Pred, GetState(Pred)->BindExpr(S, svalBuilder.makeNull())); 5138ad9cbc518a603176462f1fa1efe389023590082Ted Kremenek break; 5148ad9cbc518a603176462f1fa1efe389023590082Ted Kremenek } 5158ad9cbc518a603176462f1fa1efe389023590082Ted Kremenek 5164beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek case Stmt::ObjCAtSynchronizedStmtClass: 5174beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek VisitObjCAtSynchronizedStmt(cast<ObjCAtSynchronizedStmt>(S), Pred, Dst); 5184beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek break; 5194beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 52014429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis case Stmt::ObjCPropertyRefExprClass: 52114429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis VisitObjCPropertyRefExpr(cast<ObjCPropertyRefExpr>(S), Pred, Dst); 52214429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis break; 52314429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 524f85e193739c953358c865005855253af4f68a497John McCall case Stmt::ImplicitValueInitExprClass: { 525f85e193739c953358c865005855253af4f68a497John McCall const GRState *state = GetState(Pred); 526f85e193739c953358c865005855253af4f68a497John McCall QualType ty = cast<ImplicitValueInitExpr>(S)->getType(); 527f85e193739c953358c865005855253af4f68a497John McCall SVal val = svalBuilder.makeZeroVal(ty); 528f85e193739c953358c865005855253af4f68a497John McCall MakeNode(Dst, S, Pred, state->BindExpr(S, val)); 529f85e193739c953358c865005855253af4f68a497John McCall break; 530f85e193739c953358c865005855253af4f68a497John McCall } 531f85e193739c953358c865005855253af4f68a497John McCall 532f85e193739c953358c865005855253af4f68a497John McCall case Stmt::ExprWithCleanupsClass: { 533f85e193739c953358c865005855253af4f68a497John McCall Visit(cast<ExprWithCleanups>(S)->getSubExpr(), Pred, Dst); 534f85e193739c953358c865005855253af4f68a497John McCall break; 535f85e193739c953358c865005855253af4f68a497John McCall } 536f85e193739c953358c865005855253af4f68a497John McCall 5371b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // Cases not handled yet; but will handle some day. 5381b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::DesignatedInitExprClass: 5391b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ExtVectorElementExprClass: 5401b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ImaginaryLiteralClass: 5411b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCAtCatchStmtClass: 5421b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCAtFinallyStmtClass: 5431b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCAtTryStmtClass: 544f85e193739c953358c865005855253af4f68a497John McCall case Stmt::ObjCAutoreleasePoolStmtClass: 5451b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCEncodeExprClass: 5461b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCIsaExprClass: 5471b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCProtocolExprClass: 5481b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCSelectorExprClass: 5491b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCStringLiteralClass: 5501b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ParenListExprClass: 5511b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::PredefinedExprClass: 5521b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ShuffleVectorExprClass: 5531b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::VAArgExprClass: 554e08ce650a2b02410eddd1f60a4aa6b3d4be71e73Peter Collingbourne case Stmt::CUDAKernelCallExprClass: 55556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall case Stmt::OpaqueValueExprClass: 55661eee0ca33b29e102f11bab77c8b74cc00e2392bTanya Lattner case Stmt::AsTypeExprClass: 5571b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // Fall through. 5581b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek 5591b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // Cases we intentionally don't evaluate, since they don't need 5601b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // to be explicitly evaluated. 561bc9ad74a13e83303a3a5251f8bacbbca17341c17Zhongxing Xu case Stmt::AddrLabelExprClass: 562bc9ad74a13e83303a3a5251f8bacbbca17341c17Zhongxing Xu case Stmt::IntegerLiteralClass: 563bc9ad74a13e83303a3a5251f8bacbbca17341c17Zhongxing Xu case Stmt::CharacterLiteralClass: 564477323d58a0de352c6a61e08b5a83127c4adc904Zhongxing Xu case Stmt::CXXBoolLiteralExprClass: 565bc9ad74a13e83303a3a5251f8bacbbca17341c17Zhongxing Xu case Stmt::FloatingLiteralClass: 566f901a7de97f46ba2b1ff153f9fb83d00dc37cfcfDouglas Gregor case Stmt::SizeOfPackExprClass: 567e970c60dadaf22019743724bac879dbefbc4f5e3Ted Kremenek case Stmt::CXXNullPtrLiteralExprClass: 568e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek Dst.Add(Pred); // No-op. Simply propagate the current state unchanged. 569e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 5701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 571540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek case Stmt::ArraySubscriptExprClass: 572892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitLvalArraySubscriptExpr(cast<ArraySubscriptExpr>(S), Pred, Dst); 573540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek break; 5741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 575e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::AsmStmtClass: 576e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek VisitAsmStmt(cast<AsmStmt>(S), Pred, Dst); 577e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 578b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 579892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek case Stmt::BlockDeclRefExprClass: { 580892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const BlockDeclRefExpr *BE = cast<BlockDeclRefExpr>(S); 581892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitCommonDeclRefExpr(BE, BE->getDecl(), Pred, Dst); 58267d1287035767f4f6c8ca0c2bb755990012a44caTed Kremenek break; 583892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 5841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 585c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek case Stmt::BlockExprClass: 586c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek VisitBlockExpr(cast<BlockExpr>(S), Pred, Dst); 587c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek break; 588c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek 589e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::BinaryOperatorClass: { 59003509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const BinaryOperator* B = cast<BinaryOperator>(S); 591e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek if (B->isLogicalOp()) { 592e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek VisitLogicalExpr(B, Pred, Dst); 593e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 594e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 5952de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall else if (B->getOpcode() == BO_Comma) { 596a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(Pred); 5971397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek MakeNode(Dst, B, Pred, state->BindExpr(B, state->getSVal(B->getRHS()))); 598e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 599e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 60006fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 601b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek if (AMgr.shouldEagerlyAssume() && 602bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu (B->isRelationalOp() || B->isEqualityOp())) { 603031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 604892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitBinaryOperator(cast<BinaryOperator>(S), Pred, Tmp); 6059c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalEagerlyAssume(Dst, Tmp, cast<Expr>(S)); 60648af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 60748af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek else 608892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitBinaryOperator(cast<BinaryOperator>(S), Pred, Dst); 60948af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek 610e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 611e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 61206fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 613b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CallExprClass: 614b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CXXOperatorCallExprClass: 615b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CXXMemberCallExprClass: { 616b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek VisitCallExpr(cast<CallExpr>(S), Pred, Dst); 61706fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek break; 618e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 61906fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 6207ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu case Stmt::CXXConstructExprClass: { 6217ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu const CXXConstructExpr *C = cast<CXXConstructExpr>(S); 6227ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu // For block-level CXXConstructExpr, we don't have a destination region. 6237ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu // Let VisitCXXConstructExpr() create one. 624892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitCXXConstructExpr(C, 0, Pred, Dst); 6257ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu break; 6267ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu } 6277ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu 628856c6bcaea56e05255e9f3997ddd56b5c18a14f0Zhongxing Xu case Stmt::CXXNewExprClass: { 62903509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const CXXNewExpr *NE = cast<CXXNewExpr>(S); 630856c6bcaea56e05255e9f3997ddd56b5c18a14f0Zhongxing Xu VisitCXXNewExpr(NE, Pred, Dst); 631856c6bcaea56e05255e9f3997ddd56b5c18a14f0Zhongxing Xu break; 632856c6bcaea56e05255e9f3997ddd56b5c18a14f0Zhongxing Xu } 633856c6bcaea56e05255e9f3997ddd56b5c18a14f0Zhongxing Xu 6346b8513829895e56a7b97e787ea74520bc626512eZhongxing Xu case Stmt::CXXDeleteExprClass: { 63503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const CXXDeleteExpr *CDE = cast<CXXDeleteExpr>(S); 6366b8513829895e56a7b97e787ea74520bc626512eZhongxing Xu VisitCXXDeleteExpr(CDE, Pred, Dst); 6376b8513829895e56a7b97e787ea74520bc626512eZhongxing Xu break; 6386b8513829895e56a7b97e787ea74520bc626512eZhongxing Xu } 639e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // FIXME: ChooseExpr is really a constant. We need to fix 640e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // the CFG do not model them as explicit control-flow. 6411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 642e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::ChooseExprClass: { // __builtin_choose_expr 64303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const ChooseExpr* C = cast<ChooseExpr>(S); 644e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek VisitGuardedExpr(C, C->getLHS(), C->getRHS(), Pred, Dst); 645e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 646e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 6471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 648e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::CompoundAssignOperatorClass: 649892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitBinaryOperator(cast<BinaryOperator>(S), Pred, Dst); 650e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 651f22679e3e5d5f5754931952e58112b4c863a4137Zhongxing Xu 652f22679e3e5d5f5754931952e58112b4c863a4137Zhongxing Xu case Stmt::CompoundLiteralExprClass: 653892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitCompoundLiteralExpr(cast<CompoundLiteralExpr>(S), Pred, Dst); 654f22679e3e5d5f5754931952e58112b4c863a4137Zhongxing Xu break; 6551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 65656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall case Stmt::BinaryConditionalOperatorClass: 657e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::ConditionalOperatorClass: { // '?' operator 65856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall const AbstractConditionalOperator *C 65956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall = cast<AbstractConditionalOperator>(S); 66056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall VisitGuardedExpr(C, C->getTrueExpr(), C->getFalseExpr(), Pred, Dst); 661e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 662e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 6631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 664bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu case Stmt::CXXThisExprClass: 665bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu VisitCXXThisExpr(cast<CXXThisExpr>(S), Pred, Dst); 666bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu break; 667bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu 668892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek case Stmt::DeclRefExprClass: { 669892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const DeclRefExpr *DE = cast<DeclRefExpr>(S); 670892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitCommonDeclRefExpr(DE, DE->getDecl(), Pred, Dst); 671e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 672892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 6731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 674e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::DeclStmtClass: 675e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek VisitDeclStmt(cast<DeclStmt>(S), Pred, Dst); 676e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 6771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6780835a3cdeefe714b4959d31127ea155e56393125Argyrios Kyrtzidis case Stmt::ImplicitCastExprClass: 6790d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CStyleCastExprClass: 6800d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CXXStaticCastExprClass: 6810d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CXXDynamicCastExprClass: 6820d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CXXReinterpretCastExprClass: 6830d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CXXConstCastExprClass: 684f85e193739c953358c865005855253af4f68a497John McCall case Stmt::CXXFunctionalCastExprClass: 685f85e193739c953358c865005855253af4f68a497John McCall case Stmt::ObjCBridgedCastExprClass: { 68603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const CastExpr* C = cast<CastExpr>(S); 687f85e193739c953358c865005855253af4f68a497John McCall // Handle the previsit checks. 688f85e193739c953358c865005855253af4f68a497John McCall ExplodedNodeSet dstPrevisit; 689f85e193739c953358c865005855253af4f68a497John McCall getCheckerManager().runCheckersForPreStmt(dstPrevisit, Pred, C, *this); 690f85e193739c953358c865005855253af4f68a497John McCall 691f85e193739c953358c865005855253af4f68a497John McCall // Handle the expression itself. 692f85e193739c953358c865005855253af4f68a497John McCall ExplodedNodeSet dstExpr; 693f85e193739c953358c865005855253af4f68a497John McCall for (ExplodedNodeSet::iterator i = dstPrevisit.begin(), 694f85e193739c953358c865005855253af4f68a497John McCall e = dstPrevisit.end(); i != e ; ++i) { 695f85e193739c953358c865005855253af4f68a497John McCall VisitCast(C, C->getSubExpr(), *i, dstExpr); 696f85e193739c953358c865005855253af4f68a497John McCall } 697f85e193739c953358c865005855253af4f68a497John McCall 698f85e193739c953358c865005855253af4f68a497John McCall // Handle the postvisit checks. 699f85e193739c953358c865005855253af4f68a497John McCall getCheckerManager().runCheckersForPostStmt(Dst, dstExpr, C, *this); 700e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 701e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 702b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 703c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu case Stmt::InitListExprClass: 704c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu VisitInitListExpr(cast<InitListExpr>(S), Pred, Dst); 705c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu break; 7061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 70797ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek case Stmt::MemberExprClass: 708892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitMemberExpr(cast<MemberExpr>(S), Pred, Dst); 709469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek break; 71097ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek case Stmt::ObjCIvarRefExprClass: 711892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitLvalObjCIvarRefExpr(cast<ObjCIvarRefExpr>(S), Pred, Dst); 71297ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek break; 713af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek 714af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek case Stmt::ObjCForCollectionStmtClass: 715af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek VisitObjCForCollectionStmt(cast<ObjCForCollectionStmt>(S), Pred, Dst); 716af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek break; 7171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 71838ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek case Stmt::ObjCMessageExprClass: 719892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitObjCMessageExpr(cast<ObjCMessageExpr>(S), Pred, Dst); 720e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 7211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 722bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek case Stmt::ObjCAtThrowStmtClass: { 723bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek // FIXME: This is not complete. We basically treat @throw as 724bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek // an abort. 725bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek SaveAndRestore<bool> OldSink(Builder->BuildSinks); 726bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek Builder->BuildSinks = true; 727bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek MakeNode(Dst, S, Pred, GetState(Pred)); 728bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek break; 729bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek } 7301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7311b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek case Stmt::ReturnStmtClass: 7321b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek VisitReturnStmt(cast<ReturnStmt>(S), Pred, Dst); 7331b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek break; 7341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7358ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case Stmt::OffsetOfExprClass: 7368ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor VisitOffsetOfExpr(cast<OffsetOfExpr>(S), Pred, Dst); 7378ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 7388ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 739f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne case Stmt::UnaryExprOrTypeTraitExprClass: 740f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne VisitUnaryExprOrTypeTraitExpr(cast<UnaryExprOrTypeTraitExpr>(S), 741f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne Pred, Dst); 742e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 7431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 744e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::StmtExprClass: { 74503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const StmtExpr* SE = cast<StmtExpr>(S); 746a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek 747a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek if (SE->getSubStmt()->body_empty()) { 748a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek // Empty statement expression. 749a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek assert(SE->getType() == getContext().VoidTy 750a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek && "Empty statement expression must have void type."); 751a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek Dst.Add(Pred); 752a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek break; 753a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek } 7541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 755a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek if (Expr* LastExpr = dyn_cast<Expr>(*SE->getSubStmt()->body_rbegin())) { 756a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek const GRState* state = GetState(Pred); 7571397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek MakeNode(Dst, SE, Pred, state->BindExpr(SE, state->getSVal(LastExpr))); 758a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek } 759e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek else 760e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek Dst.Add(Pred); 7611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 762e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 763e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 7646987c7b74146b9658b1925c5981f8b0cd0672b55Zhongxing Xu 765892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek case Stmt::StringLiteralClass: { 766892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const GRState* state = GetState(Pred); 767892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal V = state->getLValue(cast<StringLiteral>(S)); 768892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek MakeNode(Dst, S, Pred, state->BindExpr(S, V)); 769892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek return; 770892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 771b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 77272374594c5d9ade02451bc85cf9dfa5b0ea106e7Ted Kremenek case Stmt::UnaryOperatorClass: { 77303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const UnaryOperator *U = cast<UnaryOperator>(S); 7742de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (AMgr.shouldEagerlyAssume()&&(U->getOpcode() == UO_LNot)) { 775031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 776892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitUnaryOperator(U, Pred, Tmp); 7779c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalEagerlyAssume(Dst, Tmp, U); 77872374594c5d9ade02451bc85cf9dfa5b0ea106e7Ted Kremenek } 77972374594c5d9ade02451bc85cf9dfa5b0ea106e7Ted Kremenek else 780892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitUnaryOperator(U, Pred, Dst); 7811b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek break; 78272374594c5d9ade02451bc85cf9dfa5b0ea106e7Ted Kremenek } 7831b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 7841b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek} 7851b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 786e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 787e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Block entrance. (Update counters). 788e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 789e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 79027c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenekvoid ExprEngine::processCFGBlockEntrance(ExplodedNodeSet &dstNodes, 79127c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek GenericNodeBuilder<BlockEntrance> &nodeBuilder){ 79227c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek 79327c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek // FIXME: Refactor this into a checker. 79427c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek const CFGBlock *block = nodeBuilder.getProgramPoint().getBlock(); 79527c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek ExplodedNode *pred = nodeBuilder.getPredecessor(); 79627c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek 79727c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek if (nodeBuilder.getBlockCounter().getNumVisited( 79827c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek pred->getLocationContext()->getCurrentStackFrame(), 79927c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek block->getBlockID()) >= AMgr.getMaxVisit()) { 80027c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek 80127c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek static int tag = 0; 802b6a2b08a6b3fbce1a6a4b69d4185165de970696cTed Kremenek nodeBuilder.generateNode(pred->getState(), pred, &tag, true); 80327c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek } 804e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek} 805e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 806e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 8071670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek// Generic node creation. 8081670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek//===----------------------------------------------------------------------===// 8091670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek 810d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios KyrtzidisExplodedNode* ExprEngine::MakeNode(ExplodedNodeSet& Dst, const Stmt* S, 811031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode* Pred, const GRState* St, 812031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ProgramPoint::Kind K, const void *tag) { 813d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis assert (Builder && "StmtNodeBuilder not present."); 8141670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek SaveAndRestore<const void*> OldTag(Builder->Tag); 8151670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek Builder->Tag = tag; 8161670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek return Builder->MakeNode(Dst, S, Pred, St, K); 8171670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek} 8181670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek 8191670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek//===----------------------------------------------------------------------===// 820e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Branch processing. 821e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 822e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 823d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisconst GRState* ExprEngine::MarkBranch(const GRState* state, 82403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Stmt* Terminator, 82503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu bool branchTaken) { 8261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 82705a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek switch (Terminator->getStmtClass()) { 82805a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek default: 829a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek return state; 8301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 83105a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek case Stmt::BinaryOperatorClass: { // '&&' and '||' 8321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 83303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const BinaryOperator* B = cast<BinaryOperator>(Terminator); 83405a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek BinaryOperator::Opcode Op = B->getOpcode(); 8351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8362de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert (Op == BO_LAnd || Op == BO_LOr); 8371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 83805a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // For &&, if we take the true branch, then the value of the whole 83905a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // expression is that of the RHS expression. 84005a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // 84105a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // For ||, if we take the false branch, then the value of the whole 84205a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // expression is that of the RHS expression. 8431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8442de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall const Expr* Ex = (Op == BO_LAnd && branchTaken) || 8452de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall (Op == BO_LOr && !branchTaken) 84603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ? B->getRHS() : B->getLHS(); 8471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8488e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek return state->BindExpr(B, UndefinedVal(Ex)); 84905a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek } 8501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 85156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall case Stmt::BinaryConditionalOperatorClass: 85205a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek case Stmt::ConditionalOperatorClass: { // ?: 85356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall const AbstractConditionalOperator* C 85456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall = cast<AbstractConditionalOperator>(Terminator); 8551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 85605a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // For ?, if branchTaken == true then the value is either the LHS or 85705a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // the condition itself. (GNU extension). 8581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 85903509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex; 8601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 86105a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek if (branchTaken) 86256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall Ex = C->getTrueExpr(); 86305a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek else 86456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall Ex = C->getFalseExpr(); 8651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8668e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek return state->BindExpr(C, UndefinedVal(Ex)); 86705a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek } 8681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 86905a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek case Stmt::ChooseExprClass: { // ?: 8701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 87103509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const ChooseExpr* C = cast<ChooseExpr>(Terminator); 8721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 87303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = branchTaken ? C->getLHS() : C->getRHS(); 8748e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek return state->BindExpr(C, UndefinedVal(Ex)); 87505a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek } 87605a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek } 87705a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek} 87805a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek 8796ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek/// RecoverCastedSymbol - A helper function for ProcessBranch that is used 8806ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek/// to try to recover some path-sensitivity for casts of symbolic 8816ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek/// integers that promote their values (which are currently not tracked well). 8826ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek/// This function returns the SVal bound to Condition->IgnoreCasts if all the 8836ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek// cast(s) did was sign-extend the original value. 8846ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenekstatic SVal RecoverCastedSymbol(GRStateManager& StateMgr, const GRState* state, 88503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Stmt* Condition, ASTContext& Ctx) { 8866ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 88703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr *Ex = dyn_cast<Expr>(Condition); 8886ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek if (!Ex) 8896ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek return UnknownVal(); 8906ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 8916ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek uint64_t bits = 0; 8926ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek bool bitsInit = false; 8931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 89403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu while (const CastExpr *CE = dyn_cast<CastExpr>(Ex)) { 8956ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek QualType T = CE->getType(); 8966ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 8976ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek if (!T->isIntegerType()) 8986ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek return UnknownVal(); 8991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9006ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek uint64_t newBits = Ctx.getTypeSize(T); 9016ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek if (!bitsInit || newBits < bits) { 9026ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek bitsInit = true; 9036ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek bits = newBits; 9046ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek } 9051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9066ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek Ex = CE->getSubExpr(); 9076ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek } 9086ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 9096ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek // We reached a non-cast. Is it a symbolic value? 9106ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek QualType T = Ex->getType(); 9116ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 9126ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek if (!bitsInit || !T->isIntegerType() || Ctx.getTypeSize(T) > bits) 9136ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek return UnknownVal(); 9141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9151397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek return state->getSVal(Ex); 9166ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek} 9176ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 918e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processBranch(const Stmt* Condition, const Stmt* Term, 919d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis BranchNodeBuilder& builder) { 9201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 921b2331834a0515c80862ee51325c758a053829f15Ted Kremenek // Check for NULL conditions; e.g. "for(;;)" 9221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!Condition) { 923b2331834a0515c80862ee51325c758a053829f15Ted Kremenek builder.markInfeasible(false); 924b2331834a0515c80862ee51325c758a053829f15Ted Kremenek return; 925b2331834a0515c80862ee51325c758a053829f15Ted Kremenek } 9261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 92721028dd8850c64a414f7a82dfddcc291351203d6Ted Kremenek PrettyStackTraceLoc CrashInfo(getContext().getSourceManager(), 92821028dd8850c64a414f7a82dfddcc291351203d6Ted Kremenek Condition->getLocStart(), 92921028dd8850c64a414f7a82dfddcc291351203d6Ted Kremenek "Error evaluating branch"); 9300fb0bc4067d6c9d7c0e655300ef309b05d3adfc9Ted Kremenek 931cc05d511b26ac6dc80fcbcc78ac305d2755aa0b9Argyrios Kyrtzidis getCheckerManager().runCheckersForBranchCondition(Condition, builder, *this); 932cc05d511b26ac6dc80fcbcc78ac305d2755aa0b9Argyrios Kyrtzidis 9330835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // If the branch condition is undefined, return; 9340835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu if (!builder.isFeasible(true) && !builder.isFeasible(false)) 9350835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu return; 9361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9370835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu const GRState* PrevState = builder.getState(); 9381397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal X = PrevState->getSVal(Condition); 939b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek 94073c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis if (X.isUnknownOrUndef()) { 9410835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // Give it a chance to recover from unknown. 9420835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu if (const Expr *Ex = dyn_cast<Expr>(Condition)) { 9430835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu if (Ex->getType()->isIntegerType()) { 9440835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // Try to recover some path-sensitivity. Right now casts of symbolic 9450835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // integers that promote their values are currently not tracked well. 9460835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // If 'Condition' is such an expression, try and recover the 9470835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // underlying value and use that instead. 9480835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu SVal recovered = RecoverCastedSymbol(getStateManager(), 9490835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu builder.getState(), Condition, 9500835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu getContext()); 951b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 9520835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu if (!recovered.isUnknown()) { 9530835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu X = recovered; 9540835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu } 955b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 9560835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu } 9570835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // If the condition is still unknown, give up. 95873c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis if (X.isUnknownOrUndef()) { 9590835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu builder.generateNode(MarkBranch(PrevState, Term, true), true); 9600835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu builder.generateNode(MarkBranch(PrevState, Term, false), false); 961b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek return; 9621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 963b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 9641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9650835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu DefinedSVal V = cast<DefinedSVal>(X); 9660835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu 9676a6719a3a11087b48d9f1a4eb08b3bd43cb05a65Ted Kremenek // Process the true branch. 968520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek if (builder.isFeasible(true)) { 96928f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *state = PrevState->assume(V, true)) 970520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek builder.generateNode(MarkBranch(state, Term, true), true); 971520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek else 972520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek builder.markInfeasible(true); 973520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek } 9741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Process the false branch. 976520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek if (builder.isFeasible(false)) { 97728f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *state = PrevState->assume(V, false)) 978520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek builder.generateNode(MarkBranch(state, Term, false), false); 979520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek else 980520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek builder.markInfeasible(false); 981520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek } 982f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek} 983f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek 984e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenek/// processIndirectGoto - Called by CoreEngine. Used to generate successor 985754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek/// nodes by processing the 'effects' of a computed goto jump. 986ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattnervoid ExprEngine::processIndirectGoto(IndirectGotoNodeBuilder &builder) { 987754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek 9881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const GRState *state = builder.getState(); 9891397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getSVal(builder.getTarget()); 9901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 991754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // Three possibilities: 992754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // 993754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // (1) We know the computed label. 9944a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek // (2) The label is NULL (or some other constant), or Undefined. 995754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // (3) We have no clue about the label. Dispatch to all targets. 996754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // 9971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 998d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis typedef IndirectGotoNodeBuilder::iterator iterator; 999754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek 10001c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu if (isa<loc::GotoLabel>(V)) { 1001ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner const LabelDecl *L = cast<loc::GotoLabel>(V).getLabel(); 10021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1003ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner for (iterator I = builder.begin(), E = builder.end(); I != E; ++I) { 100424f1a967741ff9f8025ee23be12ba6feacc31f77Ted Kremenek if (I.getLabel() == L) { 1005a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek builder.generateNode(I, state); 1006754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek return; 1007754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek } 1008754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek } 10091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1010ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner assert(false && "No block with label."); 1011754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek return; 1012754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek } 1013754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek 10141c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu if (isa<loc::ConcreteInt>(V) || isa<UndefinedVal>(V)) { 1015754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // Dispatch to the first target and mark it as a sink. 10162055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu //ExplodedNode* N = builder.generateNode(builder.begin(), state, true); 10172055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu // FIXME: add checker visit. 10182055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu // UndefBranches.insert(N); 1019754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek return; 1020754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek } 10211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1022754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // This is really a catch-all. We don't support symbolics yet. 1023b3cfd58c9b13325d994e5f9b5065e6a22d91911dTed Kremenek // FIXME: Implement dispatch for symbolic pointers. 10241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1025754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek for (iterator I=builder.begin(), E=builder.end(); I != E; ++I) 1026a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek builder.generateNode(I, state); 1027754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek} 1028f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek 1029e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 1030d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitGuardedExpr(const Expr* Ex, const Expr* L, 103103509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* R, 1032031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode* Pred, ExplodedNodeSet& Dst) { 10331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10340a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek assert(Ex == currentStmt && 1035bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu Pred->getLocationContext()->getCFG()->isBlkExpr(Ex)); 10361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1037a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(Pred); 10381397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal X = state->getSVal(Ex); 10391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1040e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek assert (X.isUndef()); 10411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 104203509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr *SE = (Expr*) cast<UndefinedVal>(X).getData(); 10431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(SE); 10441397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek X = state->getSVal(SE); 10451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1046e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // Make sure that we invalidate the previous binding. 10478e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, Ex, Pred, state->BindExpr(Ex, X, true)); 1048e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek} 1049e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 1050d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis/// ProcessEndPath - Called by CoreEngine. Used to generate end-of-path 105173099bfea9f5d4ec05265170bbefec3d76fb6b5eTed Kremenek/// nodes when the control reaches the end of a function. 1052e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processEndOfFunction(EndOfFunctionNodeBuilder& builder) { 10539c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek getTF().evalEndPath(*this, builder); 105473099bfea9f5d4ec05265170bbefec3d76fb6b5eTed Kremenek StateMgr.EndPath(builder.getState()); 1055af5800a1e287990bb547e052f257adeeae5ab476Argyrios Kyrtzidis getCheckerManager().runCheckersForEndPath(builder, *this); 105673099bfea9f5d4ec05265170bbefec3d76fb6b5eTed Kremenek} 105773099bfea9f5d4ec05265170bbefec3d76fb6b5eTed Kremenek 1058d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis/// ProcessSwitch - Called by CoreEngine. Used to generate successor 1059daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek/// nodes by processing the 'effects' of a switch statement. 1060e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processSwitch(SwitchNodeBuilder& builder) { 1061d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis typedef SwitchNodeBuilder::iterator iterator; 10621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const GRState* state = builder.getState(); 106303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* CondE = builder.getCondition(); 10641397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal CondV_untested = state->getSVal(CondE); 1065daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek 10665b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek if (CondV_untested.isUndef()) { 10672055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu //ExplodedNode* N = builder.generateDefaultCaseNode(state, true); 1068b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // FIXME: add checker 10692055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu //UndefBranches.insert(N); 10702055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu 1071daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek return; 1072daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 10735b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek DefinedOrUnknownSVal CondV = cast<DefinedOrUnknownSVal>(CondV_untested); 1074692416c214a3b234236dedcf875735a9cc29e90bTed Kremenek 10755b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek const GRState *DefaultSt = state; 107634feff654c6304e0a59ceb1376989d28dbc956ffTed Kremenek 107734feff654c6304e0a59ceb1376989d28dbc956ffTed Kremenek iterator I = builder.begin(), EI = builder.end(); 107834feff654c6304e0a59ceb1376989d28dbc956ffTed Kremenek bool defaultIsFeasible = I == EI; 10791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 108034feff654c6304e0a59ceb1376989d28dbc956ffTed Kremenek for ( ; I != EI; ++I) { 1081e71f3d587844110d836c82250830b27b1651afdbTed Kremenek // Successor may be pruned out during CFG construction. 1082e71f3d587844110d836c82250830b27b1651afdbTed Kremenek if (!I.getBlock()) 1083e71f3d587844110d836c82250830b27b1651afdbTed Kremenek continue; 1084e71f3d587844110d836c82250830b27b1651afdbTed Kremenek 1085412711774cf912bac8e81ef86da33acac6856b8aTed Kremenek const CaseStmt* Case = I.getCase(); 108672afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek 108772afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek // Evaluate the LHS of the case value. 108872afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek Expr::EvalResult V1; 10891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool b = Case->getLHS()->Evaluate(V1, getContext()); 10901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 109172afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek // Sanity checks. These go away in Release builds. 10921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(b && V1.Val.isInt() && !V1.HasSideEffects 109372afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek && "Case condition must evaluate to an integer constant."); 1094c6ed729f669044f5072a49d79041f455d971ece3Jeffrey Yasskin (void)b; // silence unused variable warning 10951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(V1.Val.getInt().getBitWidth() == 109672afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek getContext().getTypeSize(CondE->getType())); 10971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1098daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // Get the RHS of the case, if it exists. 109972afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek Expr::EvalResult V2; 11001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 110103509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const Expr* E = Case->getRHS()) { 110272afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek b = E->Evaluate(V2, getContext()); 11031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(b && V2.Val.isInt() && !V2.HasSideEffects 110472afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek && "Case condition must evaluate to an integer constant."); 1105c6ed729f669044f5072a49d79041f455d971ece3Jeffrey Yasskin (void)b; // silence unused variable warning 1106daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 110714a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek else 110814a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek V2 = V1; 11091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1110daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // FIXME: Eventually we should replace the logic below with a range 1111daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // comparison, rather than concretize the values within the range. 1112aa1c4e5a6b87b62d991c55a0d4522bcd778068d7Ted Kremenek // This should be easy once we have "ranges" for NonLVals. 11131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 111414a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek do { 11151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump nonloc::ConcreteInt CaseVal(getBasicVals().getValue(V1.Val.getInt())); 11169c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek DefinedOrUnknownSVal Res = svalBuilder.evalEQ(DefaultSt ? DefaultSt : state, 111748569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek CondV, CaseVal); 1118b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 11191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Now "assume" that the case matches. 112028f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState* stateNew = state->assume(Res, true)) { 1121a591bc04d21fa62ebffcb2c7814d738ca8f5e2f9Ted Kremenek builder.generateCaseStmtNode(I, stateNew); 11221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1123daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // If CondV evaluates to a constant, then we know that this 1124daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // is the *only* case that we can take, so stop evaluating the 1125daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // others. 11261c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu if (isa<nonloc::ConcreteInt>(CondV)) 1127daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek return; 1128daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 11291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1130daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // Now "assume" that the case doesn't match. Add this state 1131daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // to the default state (if it is feasible). 113248569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek if (DefaultSt) { 113328f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *stateNew = DefaultSt->assume(Res, false)) { 113448569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek defaultIsFeasible = true; 113548569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek DefaultSt = stateNew; 113648569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek } 113748569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek else { 113848569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek defaultIsFeasible = false; 113948569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek DefaultSt = NULL; 114048569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek } 11415014ab113eb211b8320ae30b173d7020352663c6Ted Kremenek } 1142b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 114314a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek // Concretize the next value in the range. 114472afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek if (V1.Val.getInt() == V2.Val.getInt()) 114514a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek break; 11461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 114772afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek ++V1.Val.getInt(); 114872afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek assert (V1.Val.getInt() <= V2.Val.getInt()); 11491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 115014a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek } while (true); 1151daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 11521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11534d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek if (!defaultIsFeasible) 11544d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek return; 11554d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek 11564d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // If we have switch(enum value), the default branch is not 11574d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // feasible if all of the enum constants not covered by 'case:' statements 11584d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // are not feasible values for the switch condition. 11594d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // 11604d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // Note that this isn't as accurate as it could be. Even if there isn't 11614d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // a case for a particular enum value as long as that enum value isn't 11624d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // feasible then it shouldn't be considered for making 'default:' reachable. 11634d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek const SwitchStmt *SS = builder.getSwitch(); 11644d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek const Expr *CondExpr = SS->getCond()->IgnoreParenImpCasts(); 11654d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek if (CondExpr->getType()->getAs<EnumType>()) { 11664d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek if (SS->isAllEnumCasesCovered()) 11674d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek return; 11684d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek } 11694d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek 11704d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek builder.generateDefaultCaseNode(DefaultSt); 1171daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek} 1172daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek 1173e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processCallEnter(CallEnterNodeBuilder &B) { 11742ccf047adf877f5e821210b1ce1a2c8289acadc0Ted Kremenek const GRState *state = B.getState()->enterStackFrame(B.getCalleeContext()); 1175d048c6ef5b6cfaa0cecb8cc1d4bdace32ed21d07Ted Kremenek B.generateNode(state); 1176102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor} 1177102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor 1178e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processCallExit(CallExitNodeBuilder &B) { 1179102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor const GRState *state = B.getState(); 1180102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor const ExplodedNode *Pred = B.getPredecessor(); 118119b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu const StackFrameContext *calleeCtx = 1182102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor cast<StackFrameContext>(Pred->getLocationContext()); 118319b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu const Stmt *CE = calleeCtx->getCallSite(); 1184102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor 11856190ec29f0895185bbec95a932429b8832917fecZhongxing Xu // If the callee returns an expression, bind its value to CallExpr. 11866190ec29f0895185bbec95a932429b8832917fecZhongxing Xu const Stmt *ReturnedExpr = state->get<ReturnExpr>(); 11876190ec29f0895185bbec95a932429b8832917fecZhongxing Xu if (ReturnedExpr) { 11886190ec29f0895185bbec95a932429b8832917fecZhongxing Xu SVal RetVal = state->getSVal(ReturnedExpr); 11896190ec29f0895185bbec95a932429b8832917fecZhongxing Xu state = state->BindExpr(CE, RetVal); 1190bd2b2084e58577f17308f910770a5563a344251aZhongxing Xu // Clear the return expr GDM. 11910541d106eae48f4238097df03a72028a610e0dceZhongxing Xu state = state->remove<ReturnExpr>(); 11926190ec29f0895185bbec95a932429b8832917fecZhongxing Xu } 11936190ec29f0895185bbec95a932429b8832917fecZhongxing Xu 11948e18c1b840882d26039503629d7e4ad4822f3bdaZhongxing Xu // Bind the constructed object value to CXXConstructExpr. 11958e18c1b840882d26039503629d7e4ad4822f3bdaZhongxing Xu if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(CE)) { 11969dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu const CXXThisRegion *ThisR = 119719b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu getCXXThisRegion(CCE->getConstructor()->getParent(), calleeCtx); 1198d706434b0231c76fd9acf30060646a7aa8f69aefZhongxing Xu 11998e18c1b840882d26039503629d7e4ad4822f3bdaZhongxing Xu SVal ThisV = state->getSVal(ThisR); 120005e539175d9bac678fca8e77665e88b685729850Zhongxing Xu // Always bind the region to the CXXConstructExpr. 120105e539175d9bac678fca8e77665e88b685729850Zhongxing Xu state = state->BindExpr(CCE, ThisV); 12028e18c1b840882d26039503629d7e4ad4822f3bdaZhongxing Xu } 12038e18c1b840882d26039503629d7e4ad4822f3bdaZhongxing Xu 1204d048c6ef5b6cfaa0cecb8cc1d4bdace32ed21d07Ted Kremenek B.generateNode(state); 1205102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor} 1206102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor 1207e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1208e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Transfer functions: logical operations ('&&', '||'). 1209e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1210daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek 1211d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitLogicalExpr(const BinaryOperator* B, ExplodedNode* Pred, 1212031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet& Dst) { 12131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12142de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert(B->getOpcode() == BO_LAnd || 12152de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall B->getOpcode() == BO_LOr); 12161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12170a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek assert(B==currentStmt && Pred->getLocationContext()->getCFG()->isBlkExpr(B)); 12181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1219a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(Pred); 12201397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal X = state->getSVal(B); 12213ff12591494a3cb3d3a24427975df58714ac3b2fTed Kremenek assert(X.isUndef()); 12221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12235b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek const Expr *Ex = (const Expr*) cast<UndefinedVal>(X).getData(); 12243ff12591494a3cb3d3a24427975df58714ac3b2fTed Kremenek assert(Ex); 12251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 122605a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek if (Ex == B->getRHS()) { 12271397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek X = state->getSVal(Ex); 12281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12294a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek // Handle undefined values. 12304a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek if (X.isUndef()) { 12318e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, B, Pred, state->BindExpr(B, X)); 123258b3321009b3f750fb4587b12c2024bb77e6ebf0Ted Kremenek return; 123358b3321009b3f750fb4587b12c2024bb77e6ebf0Ted Kremenek } 1234b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 12355b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek DefinedOrUnknownSVal XD = cast<DefinedOrUnknownSVal>(X); 12361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 123705a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // We took the RHS. Because the value of the '&&' or '||' expression must 123805a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // evaluate to 0 or 1, we must assume the value of the RHS evaluates to 0 123905a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // or 1. Alternatively, we could take a lazy approach, and calculate this 124005a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // value later when necessary. We don't have the machinery in place for 124105a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // this right now, and since most logical expressions are used for branches, 12421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // the payoff is not likely to be large. Instead, we do eager evaluation. 124328f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *newState = state->assume(XD, true)) 12441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump MakeNode(Dst, B, Pred, 1245c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek newState->BindExpr(B, svalBuilder.makeIntVal(1U, B->getType()))); 12461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 124728f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *newState = state->assume(XD, false)) 12481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump MakeNode(Dst, B, Pred, 1249c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek newState->BindExpr(B, svalBuilder.makeIntVal(0U, B->getType()))); 1250f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek } 1251f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek else { 125205a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // We took the LHS expression. Depending on whether we are '&&' or 125305a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // '||' we know what the value of the expression is via properties of 125405a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // the short-circuiting. 1255c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek X = svalBuilder.makeIntVal(B->getOpcode() == BO_LAnd ? 0U : 1U, 1256d91ee27950ef5c321db1ac2aa5becb75ffe7cb14Zhongxing Xu B->getType()); 12578e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, B, Pred, state->BindExpr(B, X)); 125805a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek } 125971c29bdc931bc49644c581ec7d698f0dbf01a0aaTed Kremenek} 12601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1261e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1262ec96a2d52d16e150baaf629cd35e3fabff5d8915Ted Kremenek// Transfer functions: Loads and stores. 1263e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1264d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek 1265d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitBlockExpr(const BlockExpr *BE, ExplodedNode *Pred, 1266c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek ExplodedNodeSet &Dst) { 1267b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 126866078610be5e4319de02efa283b07887c73c2e27Ted Kremenek ExplodedNodeSet Tmp; 1269b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1270c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek CanQualType T = getContext().getCanonicalType(BE->getType()); 1271c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.getBlockPointer(BE->getBlockDecl(), T, 12720a8112a78d00b5140c5b7f16c3b34c2c0c13c1a0Ted Kremenek Pred->getLocationContext()); 12730a8112a78d00b5140c5b7f16c3b34c2c0c13c1a0Ted Kremenek 127466078610be5e4319de02efa283b07887c73c2e27Ted Kremenek MakeNode(Tmp, BE, Pred, GetState(Pred)->BindExpr(BE, V), 1275c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek ProgramPoint::PostLValueKind); 1276b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 127766078610be5e4319de02efa283b07887c73c2e27Ted Kremenek // Post-visit the BlockExpr. 1278eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPostStmt(Dst, Tmp, BE, *this); 1279c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek} 1280c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek 1281d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitCommonDeclRefExpr(const Expr *Ex, const NamedDecl *D, 1282d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNode *Pred, 1283d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNodeSet &Dst) { 12845b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek const GRState *state = GetState(Pred); 12856d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu 12866d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu if (const VarDecl* VD = dyn_cast<VarDecl>(D)) { 1287892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek assert(Ex->isLValue()); 1288d17da2b99f323fa91b01e1dd119cc32e0ee8197dTed Kremenek SVal V = state->getLValue(VD, Pred->getLocationContext()); 1289a7581731b1453b51b26154d2409d42a5b6395079Zhongxing Xu 1290892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // For references, the 'lvalue' is the pointer address stored in the 1291892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // reference region. 1292892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (VD->getType()->isReferenceType()) { 1293892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (const MemRegion *R = V.getAsRegion()) 1294892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek V = state->getSVal(R); 1295892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek else 1296892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek V = UnknownVal(); 1297852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 12986d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu 1299892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek MakeNode(Dst, Ex, Pred, state->BindExpr(Ex, V), 1300892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ProgramPoint::PostLValueKind); 1301852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return; 1302892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 1303892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (const EnumConstantDecl* ED = dyn_cast<EnumConstantDecl>(D)) { 1304892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek assert(!Ex->isLValue()); 1305c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.makeIntVal(ED->getInitVal()); 13068e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, Ex, Pred, state->BindExpr(Ex, V)); 13076d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu return; 1308892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 1309892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (const FunctionDecl* FD = dyn_cast<FunctionDecl>(D)) { 1310c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.getFunctionPointer(FD); 13118e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, Ex, Pred, state->BindExpr(Ex, V), 13127090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek ProgramPoint::PostLValueKind); 13136d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu return; 13141b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 13156d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu assert (false && 13166d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu "ValueDecl support for this ValueDecl not implemented."); 13173271f8d315712885ac87747369bb1d9f4b1ea81fTed Kremenek} 13183271f8d315712885ac87747369bb1d9f4b1ea81fTed Kremenek 1319540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek/// VisitArraySubscriptExpr - Transfer function for array accesses 1320d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitLvalArraySubscriptExpr(const ArraySubscriptExpr* A, 1321d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNode* Pred, 1322d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNodeSet& Dst){ 13231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 132403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Base = A->getBase()->IgnoreParens(); 132503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Idx = A->getIdx()->IgnoreParens(); 1326892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek 1327892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // Evaluate the base. 1328031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 1329892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(Base, Pred, Tmp); 13301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1331031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I1=Tmp.begin(), E1=Tmp.end(); I1!=E1; ++I1) { 1332031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp2; 1333d9bc33efa195114d6f2a365c26e5b8dba4e1cc38Ted Kremenek Visit(Idx, *I1, Tmp2); // Evaluate the index. 1334d694485f9d6e3ea7b458df8241dfffd38f62aca8Zhongxing Xu ExplodedNodeSet Tmp3; 1335eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(Tmp3, Tmp2, A, *this); 1336d694485f9d6e3ea7b458df8241dfffd38f62aca8Zhongxing Xu 1337d694485f9d6e3ea7b458df8241dfffd38f62aca8Zhongxing Xu for (ExplodedNodeSet::iterator I2=Tmp3.begin(),E2=Tmp3.end();I2!=E2; ++I2) { 1338a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I2); 13391397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getLValue(A->getType(), state->getSVal(Idx), 13401397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek state->getSVal(Base)); 1341892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek assert(A->isLValue()); 1342892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek MakeNode(Dst, A, *I2, state->BindExpr(A, V), ProgramPoint::PostLValueKind); 13434d0348b6c74d2710a3693bbfbcfc5fcb3bc132eeTed Kremenek } 13441b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 1345540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek} 1346540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek 1347469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek/// VisitMemberExpr - Transfer function for member expressions. 1348d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitMemberExpr(const MemberExpr* M, ExplodedNode* Pred, 1349d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNodeSet& Dst) { 13501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1351892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Expr *baseExpr = M->getBase()->IgnoreParens(); 1352892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet dstBase; 1353892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(baseExpr, Pred, dstBase); 13541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1355892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek FieldDecl *field = dyn_cast<FieldDecl>(M->getMemberDecl()); 1356892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (!field) // FIXME: skipping member expressions for non-fields 135786f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor return; 135886f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 1359892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek for (ExplodedNodeSet::iterator I = dstBase.begin(), E = dstBase.end(); 1360892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek I != E; ++I) { 1361a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 1362892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal baseExprVal = state->getSVal(baseExpr); 1363892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (isa<nonloc::LazyCompoundVal>(baseExprVal) || 1364c2e20d0c42cf085940c9a9cb495a7116d1b0eb07Argyrios Kyrtzidis isa<nonloc::CompoundVal>(baseExprVal) || 1365c2e20d0c42cf085940c9a9cb495a7116d1b0eb07Argyrios Kyrtzidis // FIXME: This can originate by conjuring a symbol for an unknown 1366c2e20d0c42cf085940c9a9cb495a7116d1b0eb07Argyrios Kyrtzidis // temporary struct object, see test/Analysis/fields.c: 1367c2e20d0c42cf085940c9a9cb495a7116d1b0eb07Argyrios Kyrtzidis // (p = getit()).x 1368c2e20d0c42cf085940c9a9cb495a7116d1b0eb07Argyrios Kyrtzidis isa<nonloc::SymbolVal>(baseExprVal)) { 1369892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek MakeNode(Dst, M, *I, state->BindExpr(M, UnknownVal())); 1370892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek continue; 1371892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 1372892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek 1373d9bc33efa195114d6f2a365c26e5b8dba4e1cc38Ted Kremenek // FIXME: Should we insert some assumption logic in here to determine 1374d9bc33efa195114d6f2a365c26e5b8dba4e1cc38Ted Kremenek // if "Base" is a valid piece of memory? Before we put this assumption 137586f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // later when using FieldOffset lvals (which we no longer have). 1376d9bc33efa195114d6f2a365c26e5b8dba4e1cc38Ted Kremenek 1377892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // For all other cases, compute an lvalue. 1378892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal L = state->getLValue(field, baseExprVal); 1379892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (M->isLValue()) 1380662174ca204cb520f634bdcb34a3708f45389d14Zhongxing Xu MakeNode(Dst, M, *I, state->BindExpr(M, L), ProgramPoint::PostLValueKind); 1381662174ca204cb520f634bdcb34a3708f45389d14Zhongxing Xu else 13829c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLoad(Dst, M, *I, state, L); 1383469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek } 1384469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek} 1385469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek 13869c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek/// evalBind - Handle the semantics of binding a value to a specific location. 13879c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek/// This method is used by evalStore and (soon) VisitDeclStmt, and others. 1388d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalBind(ExplodedNodeSet& Dst, const Stmt* StoreE, 138979d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek ExplodedNode* Pred, const GRState* state, 139079d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek SVal location, SVal Val, bool atDeclInit) { 1391b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1392b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1393b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // Do a previsit of the bind. 1394b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek ExplodedNodeSet CheckedSet, Src; 1395b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek Src.Add(Pred); 1396eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForBind(CheckedSet, Src, location, Val, StoreE, 1397eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis *this); 1398b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1399b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek for (ExplodedNodeSet::iterator I = CheckedSet.begin(), E = CheckedSet.end(); 1400b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek I!=E; ++I) { 1401b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1402b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek if (Pred != *I) 1403b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek state = GetState(*I); 1404b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1405b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek const GRState* newState = 0; 1406a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek 1407b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek if (atDeclInit) { 1408b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek const VarRegion *VR = 1409b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek cast<VarRegion>(cast<loc::MemRegionVal>(location).getRegion()); 1410f6f56d4fc8ebce17e7b83eb2c35f57a055c22283Ted Kremenek 1411b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek newState = state->bindDecl(VR, Val); 1412f6f56d4fc8ebce17e7b83eb2c35f57a055c22283Ted Kremenek } 1413f6f56d4fc8ebce17e7b83eb2c35f57a055c22283Ted Kremenek else { 1414b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek if (location.isUnknown()) { 1415b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // We know that the new state will be the same as the old state since 1416b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // the location of the binding is "unknown". Consequently, there 1417b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // is no reason to just create a new node. 1418b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek newState = state; 1419b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek } 1420b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek else { 1421b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // We are binding to a value other than 'unknown'. Perform the binding 1422b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // using the StoreManager. 1423b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek newState = state->bindLoc(cast<Loc>(location), Val); 1424b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek } 1425f6f56d4fc8ebce17e7b83eb2c35f57a055c22283Ted Kremenek } 1426a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek 1427d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis // The next thing to do is check if the TransferFuncs object wants to 1428b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // update the state based on the new binding. If the GRTransferFunc object 1429b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // doesn't do anything, just auto-propagate the current state. 143079d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek 143179d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek // NOTE: We use 'AssignE' for the location of the PostStore if 'AssignE' 143279d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek // is non-NULL. Checkers typically care about 143379d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek 1434d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilderRef BuilderRef(Dst, *Builder, *this, *I, newState, StoreE, 143596ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek true); 14361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14379c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek getTF().evalBind(BuilderRef, location, Val); 1438b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek } 1439a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek} 1440a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek 14419c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek/// evalStore - Handle the semantics of a store via an assignment. 1442a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek/// @param Dst The node set to store generated state nodes 1443e8a4d7d0064b357a30fe7ee4f2ddc02f9ffc0357Zhongxing Xu/// @param AssignE The assignment expression if the store happens in an 1444e8a4d7d0064b357a30fe7ee4f2ddc02f9ffc0357Zhongxing Xu/// assignment. 1445e8a4d7d0064b357a30fe7ee4f2ddc02f9ffc0357Zhongxing Xu/// @param LocatioinE The location expression that is stored to. 1446a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek/// @param state The current simulation state 1447a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek/// @param location The location to store the value 1448a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek/// @param Val The value to be stored 1449d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalStore(ExplodedNodeSet& Dst, const Expr *AssignE, 145079d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek const Expr* LocationE, 145150ecd1536a2b70327e9eb2c2c2a652cde3dae365Ted Kremenek ExplodedNode* Pred, 14521670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek const GRState* state, SVal location, SVal Val, 14531670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek const void *tag) { 14541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1455d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis assert(Builder && "StmtNodeBuilder must be defined."); 14561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 145714429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis // Proceed with the store. We use AssignE as the anchor for the PostStore 145814429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis // ProgramPoint if it is non-NULL, and LocationE otherwise. 145914429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis const Expr *StoreE = AssignE ? AssignE : LocationE; 146014429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 146114429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis if (isa<loc::ObjCPropRef>(location)) { 146214429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis loc::ObjCPropRef prop = cast<loc::ObjCPropRef>(location); 146314429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNodeSet src = Pred; 146414429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis return VisitObjCMessage(ObjCPropertySetter(prop.getPropRefExpr(), 146514429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis StoreE, Val), src, Dst); 146614429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis } 146714429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 14681b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Evaluate the location (checks for bad dereferences). 1469b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ExplodedNodeSet Tmp; 14709c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLocation(Tmp, LocationE, Pred, state, location, tag, false); 14711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1472b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (Tmp.empty()) 14731b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek return; 1474b0533965f1b4db020692e3b23ca7b3bc15bf5897Ted Kremenek 147573c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis if (location.isUndef()) 147673c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis return; 1477a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek 1478b4b817d704287836b52b34369009e682f208aa2bTed Kremenek SaveAndRestore<ProgramPoint::Kind> OldSPointKind(Builder->PointKind, 1479b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ProgramPoint::PostStoreKind); 1480b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1481b4b817d704287836b52b34369009e682f208aa2bTed Kremenek for (ExplodedNodeSet::iterator NI=Tmp.begin(), NE=Tmp.end(); NI!=NE; ++NI) 14829c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalBind(Dst, StoreE, *NI, GetState(*NI), location, Val); 14831b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek} 14841b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 1485d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalLoad(ExplodedNodeSet& Dst, const Expr *Ex, 14863992a50eea030a2913f1d267554f55ecd00d694cZhongxing Xu ExplodedNode* Pred, 14871670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek const GRState* state, SVal location, 1488652be346f74feba027bcbdeb6a3e3f4755a0e62cZhongxing Xu const void *tag, QualType LoadTy) { 1489cca8ab155e8c20b98ba2d90eb2b1c228895e06fdZhanyong Wan assert(!isa<NonLoc>(location) && "location cannot be a NonLoc."); 14901b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 149114429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis if (isa<loc::ObjCPropRef>(location)) { 149214429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis loc::ObjCPropRef prop = cast<loc::ObjCPropRef>(location); 149314429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNodeSet src = Pred; 149414429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis return VisitObjCMessage(ObjCPropertyGetter(prop.getPropRefExpr(), Ex), 149514429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis src, Dst); 149614429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis } 149714429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 1498852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek // Are we loading from a region? This actually results in two loads; one 1499852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek // to fetch the address of the referenced value and one to fetch the 1500852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek // referenced value. 1501b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek if (const TypedRegion *TR = 1502852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek dyn_cast_or_null<TypedRegion>(location.getAsRegion())) { 1503b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1504018220c343c103b7dfaa117a7a474c7a7fd6d068Zhongxing Xu QualType ValTy = TR->getValueType(); 1505852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (const ReferenceType *RT = ValTy->getAs<ReferenceType>()) { 1506b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek static int loadReferenceTag = 0; 1507852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek ExplodedNodeSet Tmp; 15089c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLoadCommon(Tmp, Ex, Pred, state, location, &loadReferenceTag, 1509852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek getContext().getPointerType(RT->getPointeeType())); 1510852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek 1511852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek // Perform the load from the referenced value. 1512852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end() ; I!=E; ++I) { 1513852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek state = GetState(*I); 15141397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek location = state->getSVal(Ex); 15159c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLoadCommon(Dst, Ex, *I, state, location, tag, LoadTy); 1516b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek } 1517852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return; 1518852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 1519852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 1520b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 15219c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLoadCommon(Dst, Ex, Pred, state, location, tag, LoadTy); 1522852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek} 1523852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek 1524d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalLoadCommon(ExplodedNodeSet& Dst, const Expr *Ex, 1525852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek ExplodedNode* Pred, 1526852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek const GRState* state, SVal location, 1527852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek const void *tag, QualType LoadTy) { 1528b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 15291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Evaluate the location (checks for bad dereferences). 1530b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ExplodedNodeSet Tmp; 15319c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLocation(Tmp, Ex, Pred, state, location, tag, true); 15321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1533b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (Tmp.empty()) 15341b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek return; 1535b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 153673c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis if (location.isUndef()) 153773c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis return; 1538b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1539b4b817d704287836b52b34369009e682f208aa2bTed Kremenek SaveAndRestore<ProgramPoint::Kind> OldSPointKind(Builder->PointKind); 15401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15411b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Proceed with the load. 1542b4b817d704287836b52b34369009e682f208aa2bTed Kremenek for (ExplodedNodeSet::iterator NI=Tmp.begin(), NE=Tmp.end(); NI!=NE; ++NI) { 1543b4b817d704287836b52b34369009e682f208aa2bTed Kremenek state = GetState(*NI); 154496ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek 1545b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (location.isUnknown()) { 1546b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // This is important. We must nuke the old binding. 1547b4b817d704287836b52b34369009e682f208aa2bTed Kremenek MakeNode(Dst, Ex, *NI, state->BindExpr(Ex, UnknownVal()), 1548b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ProgramPoint::PostLoadKind, tag); 1549b4b817d704287836b52b34369009e682f208aa2bTed Kremenek } 1550b4b817d704287836b52b34369009e682f208aa2bTed Kremenek else { 155196ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek if (LoadTy.isNull()) 155296ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek LoadTy = Ex->getType(); 155396ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek SVal V = state->getSVal(cast<Loc>(location), LoadTy); 155496ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek MakeNode(Dst, Ex, *NI, state->bindExprAndLocation(Ex, location, V), 155596ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek ProgramPoint::PostLoadKind, tag); 1556b4b817d704287836b52b34369009e682f208aa2bTed Kremenek } 1557d5b499d43c3526fae7f9ebb6e2d50e79d3496cedZhongxing Xu } 15581b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek} 15591b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 1560d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalLocation(ExplodedNodeSet &Dst, const Stmt *S, 1561b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ExplodedNode* Pred, 1562b4b817d704287836b52b34369009e682f208aa2bTed Kremenek const GRState* state, SVal location, 1563b4b817d704287836b52b34369009e682f208aa2bTed Kremenek const void *tag, bool isLoad) { 156400b1ad2d56f3e39f95c3f61bf511a531ab6a4fa5Zhongxing Xu // Early checks for performance reason. 1565769ce3e93ad35bd9ac28e4d8b8f035ae4fd9a5b5Argyrios Kyrtzidis if (location.isUnknown()) { 1566b4b817d704287836b52b34369009e682f208aa2bTed Kremenek Dst.Add(Pred); 1567b4b817d704287836b52b34369009e682f208aa2bTed Kremenek return; 1568b4b817d704287836b52b34369009e682f208aa2bTed Kremenek } 1569b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 15709c0d6891b3ec4b0d20b8a295946c0dc5426d147cArgyrios Kyrtzidis ExplodedNodeSet Src; 1571eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis if (Builder->GetState(Pred) == state) { 1572eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis Src.Add(Pred); 1573eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis } else { 1574eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // Associate this new state with an ExplodedNode. 1575eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // FIXME: If I pass null tag, the graph is incorrect, e.g for 1576eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // int *p; 1577eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // p = 0; 1578eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // *p = 0xDEADBEEF; 1579eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // "p = 0" is not noted as "Null pointer value stored to 'p'" but 1580eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // instead "int *p" is noted as 1581eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // "Variable 'p' initialized to a null pointer value" 1582eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis ExplodedNode *N = Builder->generateNode(S, state, Pred, this); 1583eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis Src.Add(N ? N : Pred); 15840296c22557b3735e2ffeff690eb46fb0e9152bccTed Kremenek } 1585eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForLocation(Dst, Src, location, isLoad, S, 1586eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis *this); 1587ec96a2d52d16e150baaf629cd35e3fabff5d8915Ted Kremenek} 1588ec96a2d52d16e150baaf629cd35e3fabff5d8915Ted Kremenek 1589d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisbool ExprEngine::InlineCall(ExplodedNodeSet &Dst, const CallExpr *CE, 15901c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu ExplodedNode *Pred) { 1591b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek return false; 1592b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1593b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Inlining isn't correct right now because we: 1594b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // (a) don't generate CallExit nodes. 1595b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // (b) we need a way to postpone doing post-visits of CallExprs until 1596b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // the CallExit. This means we need CallExits for the non-inline 1597b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // cases as well. 1598b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1599b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek#if 0 16001c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu const GRState *state = GetState(Pred); 16011c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu const Expr *Callee = CE->getCallee(); 16021c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu SVal L = state->getSVal(Callee); 16031c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu 16041c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu const FunctionDecl *FD = L.getAsFunctionDecl(); 16051c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu if (!FD) 16061c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu return false; 16071c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu 1608b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Specially handle CXXMethods. 1609b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const CXXMethodDecl *methodDecl = 0; 1610b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1611b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek switch (CE->getStmtClass()) { 1612b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek default: break; 1613b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CXXOperatorCallExprClass: { 1614b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const CXXOperatorCallExpr *opCall = cast<CXXOperatorCallExpr>(CE); 1615b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek methodDecl = 1616b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek llvm::dyn_cast_or_null<CXXMethodDecl>(opCall->getCalleeDecl()); 1617b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek break; 1618b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek } 1619b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CXXMemberCallExprClass: { 1620b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const CXXMemberCallExpr *memberCall = cast<CXXMemberCallExpr>(CE); 1621b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const MemberExpr *memberExpr = 1622b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek cast<MemberExpr>(memberCall->getCallee()->IgnoreParens()); 1623b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek methodDecl = cast<CXXMethodDecl>(memberExpr->getMemberDecl()); 1624b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek break; 1625b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek } 1626b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek } 1627b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1628b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1629b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1630b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1631c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu // Check if the function definition is in the same translation unit. 1632c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu if (FD->hasBody(FD)) { 163319b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu const StackFrameContext *stackFrame = 163419b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu AMgr.getStackFrame(AMgr.getAnalysisContext(FD), 163519b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu Pred->getLocationContext(), 1636892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek CE, Builder->getBlock(), Builder->getIndex()); 1637c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu // Now we have the definition of the callee, create a CallEnter node. 163819b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu CallEnter Loc(CE, stackFrame, Pred->getLocationContext()); 1639c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu 1640c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu ExplodedNode *N = Builder->generateNode(Loc, state, Pred); 1641c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu Dst.Add(N); 1642c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu return true; 1643c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu } 16441c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu 1645c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu // Check if we can find the function definition in other translation units. 1646c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu if (AMgr.hasIndexer()) { 164719b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu AnalysisContext *C = AMgr.getAnalysisContextInAnotherTU(FD); 1648c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu if (C == 0) 1649c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu return false; 165019b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu const StackFrameContext *stackFrame = 165119b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu AMgr.getStackFrame(C, Pred->getLocationContext(), 1652892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek CE, Builder->getBlock(), Builder->getIndex()); 165319b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu CallEnter Loc(CE, stackFrame, Pred->getLocationContext()); 1654c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu ExplodedNode *N = Builder->generateNode(Loc, state, Pred); 16551c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu Dst.Add(N); 1656c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu return true; 1657c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu } 1658b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1659b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Generate the CallExit node. 1660c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu 1661c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu return false; 1662b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek#endif 16631c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu} 16641c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu 1665b277159055933e610bbc80262b600d3ad7e0595cTed Kremenekvoid ExprEngine::VisitCallExpr(const CallExpr* CE, ExplodedNode* Pred, 1666b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek ExplodedNodeSet& dst) { 16673cead901aab394fe8e84953235959ece8002854fTed Kremenek 16689d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // Determine the type of function we're calling (if available). 166972564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor const FunctionProtoType *Proto = NULL; 16709d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor QualType FnType = CE->getCallee()->IgnoreParens()->getType(); 16716217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek if (const PointerType *FnTypePtr = FnType->getAs<PointerType>()) 1672183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall Proto = FnTypePtr->getPointeeType()->getAs<FunctionProtoType>(); 16739d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor 1674b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Should the first argument be evaluated as an lvalue? 1675b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek bool firstArgumentAsLvalue = false; 1676b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek switch (CE->getStmtClass()) { 1677b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CXXOperatorCallExprClass: 1678b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek firstArgumentAsLvalue = true; 1679b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek break; 1680b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek default: 1681b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek break; 16825a5d98bc6962dc2d1aaa5e0e522f1bf84273b9c1Ted Kremenek } 1683b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1684b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Evaluate the arguments. 1685b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek ExplodedNodeSet dstArgsEvaluated; 1686b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek evalArguments(CE->arg_begin(), CE->arg_end(), Proto, Pred, dstArgsEvaluated, 1687b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek firstArgumentAsLvalue); 1688b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1689b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Evaluate the callee. 1690b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek ExplodedNodeSet dstCalleeEvaluated; 1691b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek evalCallee(CE, dstArgsEvaluated, dstCalleeEvaluated); 1692b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1693b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Perform the previsit of the CallExpr. 1694b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek ExplodedNodeSet dstPreVisit; 1695b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, dstCalleeEvaluated, 1696b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek CE, *this); 1697b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1698b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Now evaluate the call itself. 1699eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis class DefaultEval : public GraphExpander { 1700eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis ExprEngine &Eng; 1701eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis const CallExpr *CE; 1702eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis public: 1703eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis 1704eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis DefaultEval(ExprEngine &eng, const CallExpr *ce) 1705b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek : Eng(eng), CE(ce) {} 1706eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis virtual void expandGraph(ExplodedNodeSet &Dst, ExplodedNode *Pred) { 1707b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Should we inline the call? 1708eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis if (Eng.getAnalysisManager().shouldInlineCall() && 1709eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis Eng.InlineCall(Dst, CE, Pred)) { 1710b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek return; 171117f4da8f150f6b9dfb571cebd6299b06948e5385Ted Kremenek } 1712b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1713b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek StmtNodeBuilder &Builder = Eng.getBuilder(); 1714b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek assert(&Builder && "StmtNodeBuilder must be defined."); 1715b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1716b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Dispatch to the plug-in transfer function. 1717b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek unsigned oldSize = Dst.size(); 1718b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek SaveOr OldHasGen(Builder.hasGeneratedNode); 1719b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1720b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Dispatch to transfer function logic to handle the call itself. 1721b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const Expr* Callee = CE->getCallee()->IgnoreParens(); 1722b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const GRState* state = Eng.GetState(Pred); 1723b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek SVal L = state->getSVal(Callee); 1724b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek Eng.getTF().evalCall(Dst, Eng, Builder, CE, L, Pred); 1725b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1726b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Handle the case where no nodes where generated. Auto-generate that 1727b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // contains the updated state if we aren't generating sinks. 1728b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek if (!Builder.BuildSinks && Dst.size() == oldSize && 1729b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek !Builder.hasGeneratedNode) 1730b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek Eng.MakeNode(Dst, CE, Pred, state); 1731935ef90f4b065c7c865ee5b2a99c5f9b1a115d72Zhongxing Xu } 1732eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis }; 1733eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis 1734eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // Finally, evaluate the function call. We try each of the checkers 1735eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // to see if the can evaluate the function call. 1736b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek ExplodedNodeSet dstCallEvaluated; 1737eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis DefaultEval defEval(*this, CE); 1738b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek getCheckerManager().runCheckersForEvalCall(dstCallEvaluated, 1739b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek dstPreVisit, 1740b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek CE, *this, &defEval); 1741b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 17423cead901aab394fe8e84953235959ece8002854fTed Kremenek // Finally, perform the post-condition check of the CallExpr and store 17433cead901aab394fe8e84953235959ece8002854fTed Kremenek // the created nodes in 'Dst'. 1744b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek getCheckerManager().runCheckersForPostStmt(dst, dstCallEvaluated, CE, 1745b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek *this); 1746e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek} 1747e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 1748e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 174914429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis// Transfer function: Objective-C dot-syntax to access a property. 175014429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis//===----------------------------------------------------------------------===// 175114429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 175214429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidisvoid ExprEngine::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *Ex, 175314429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNode *Pred, 175414429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNodeSet &Dst) { 175514429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNodeSet dstBase; 17569319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis 17579319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis // Visit the receiver (if any). 17589319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis if (Ex->isObjectReceiver()) 17599319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis Visit(Ex->getBase(), Pred, dstBase); 17609319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis else 17619319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis dstBase = Pred; 176214429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 176314429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNodeSet dstPropRef; 176414429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 176514429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis // Using the base, compute the lvalue of the instance variable. 176614429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis for (ExplodedNodeSet::iterator I = dstBase.begin(), E = dstBase.end(); 176714429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis I!=E; ++I) { 176814429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNode *nodeBase = *I; 176914429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis const GRState *state = GetState(nodeBase); 177014429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis MakeNode(dstPropRef, Ex, *I, state->BindExpr(Ex, loc::ObjCPropRef(Ex))); 177114429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis } 177214429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 177314429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis Dst.insert(dstPropRef); 177414429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis} 177514429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 177614429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis//===----------------------------------------------------------------------===// 177797ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek// Transfer function: Objective-C ivar references. 177897ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek//===----------------------------------------------------------------------===// 177948af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek 1780f5cae63463cdb325a0bed146595607cba6da1ebcTed Kremenekstatic std::pair<const void*,const void*> EagerlyAssumeTag 1781a5fdd9ce694b1c2dbfd225cb6f55ef743d1ab562Douglas Gregor = std::pair<const void*,const void*>(&EagerlyAssumeTag,static_cast<void*>(0)); 1782f5cae63463cdb325a0bed146595607cba6da1ebcTed Kremenek 1783d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalEagerlyAssume(ExplodedNodeSet &Dst, ExplodedNodeSet &Src, 178403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr *Ex) { 1785031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I=Src.begin(), E=Src.end(); I!=E; ++I) { 1786031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode *Pred = *I; 17871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1788b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek // Test if the previous node was as the same expression. This can happen 1789b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek // when the expression fails to evaluate to anything meaningful and 1790b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek // (as an optimization) we don't generate a node. 17911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ProgramPoint P = Pred->getLocation(); 1792b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek if (!isa<PostStmt>(P) || cast<PostStmt>(P).getStmt() != Ex) { 17931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Dst.Add(Pred); 1794b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek continue; 17951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 1796b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek 179759fea60cc3dde7a14eeafab9469cb911023fdd7fZhongxing Xu const GRState* state = GetState(Pred); 17981397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getSVal(Ex); 17995b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek if (nonloc::SymExprVal *SEV = dyn_cast<nonloc::SymExprVal>(&V)) { 180048af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek // First assume that the condition is true. 180128f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *stateTrue = state->assume(*SEV, true)) { 18021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump stateTrue = stateTrue->BindExpr(Ex, 1803c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.makeIntVal(1U, Ex->getType())); 18041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Dst.Add(Builder->generateNode(PostStmtCustom(Ex, 180525e695b2d574d919cc1bbddf3a2efe073d449b1cZhongxing Xu &EagerlyAssumeTag, Pred->getLocationContext()), 180648af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek stateTrue, Pred)); 180748af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 18081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 180948af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek // Next, assume that the condition is false. 181028f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *stateFalse = state->assume(*SEV, false)) { 18111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump stateFalse = stateFalse->BindExpr(Ex, 1812c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.makeIntVal(0U, Ex->getType())); 181325e695b2d574d919cc1bbddf3a2efe073d449b1cZhongxing Xu Dst.Add(Builder->generateNode(PostStmtCustom(Ex, &EagerlyAssumeTag, 181425e695b2d574d919cc1bbddf3a2efe073d449b1cZhongxing Xu Pred->getLocationContext()), 181548af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek stateFalse, Pred)); 181648af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 181748af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 181848af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek else 181948af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek Dst.Add(Pred); 182048af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 182148af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek} 182248af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek 182348af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek//===----------------------------------------------------------------------===// 18244beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek// Transfer function: Objective-C @synchronized. 18254beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek//===----------------------------------------------------------------------===// 18264beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 1827d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitObjCAtSynchronizedStmt(const ObjCAtSynchronizedStmt *S, 18284beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek ExplodedNode *Pred, 18294beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek ExplodedNodeSet &Dst) { 18304beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 18314beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek // The mutex expression is a CFGElement, so we don't need to explicitly 18324beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek // visit it since it will already be processed. 18334beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 18344beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek // Pre-visit the ObjCAtSynchronizedStmt. 18354beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek ExplodedNodeSet Tmp; 18364beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek Tmp.Add(Pred); 1837eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(Dst, Tmp, S, *this); 18384beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek} 18394beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 18404beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek//===----------------------------------------------------------------------===// 184148af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek// Transfer function: Objective-C ivar references. 184248af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek//===----------------------------------------------------------------------===// 184397ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek 1844d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitLvalObjCIvarRefExpr(const ObjCIvarRefExpr* Ex, 1845d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNode* Pred, 1846d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNodeSet& Dst) { 18471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1848892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // Visit the base expression, which is needed for computing the lvalue 1849892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // of the ivar. 1850892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet dstBase; 1851892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const Expr *baseExpr = Ex->getBase(); 1852892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(baseExpr, Pred, dstBase); 18531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18546547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis ExplodedNodeSet dstIvar; 18556547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis 1856892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // Using the base, compute the lvalue of the instance variable. 1857892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek for (ExplodedNodeSet::iterator I = dstBase.begin(), E = dstBase.end(); 1858892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek I!=E; ++I) { 1859892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNode *nodeBase = *I; 1860892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const GRState *state = GetState(nodeBase); 1861892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal baseVal = state->getSVal(baseExpr); 1862892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal location = state->getLValue(Ex->getDecl(), baseVal); 18636547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis MakeNode(dstIvar, Ex, *I, state->BindExpr(Ex, location)); 186497ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek } 18656547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis 18666547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis // Perform the post-condition check of the ObjCIvarRefExpr and store 18676547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis // the created nodes in 'Dst'. 1868eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPostStmt(Dst, dstIvar, Ex, *this); 186997ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek} 187097ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek 187197ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek//===----------------------------------------------------------------------===// 1872af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek// Transfer function: Objective-C fast enumeration 'for' statements. 1873af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek//===----------------------------------------------------------------------===// 1874af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek 1875d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitObjCForCollectionStmt(const ObjCForCollectionStmt* S, 1876b317f8f5ca8737a5bbad97a3f7566a2dbd2ed61bZhongxing Xu ExplodedNode* Pred, ExplodedNodeSet& Dst) { 18771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1878af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // ObjCForCollectionStmts are processed in two places. This method 1879af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // handles the case where an ObjCForCollectionStmt* occurs as one of the 1880af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // statements within a basic block. This transfer function does two things: 1881af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // 1882af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // (1) binds the next container value to 'element'. This creates a new 1883af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // node in the ExplodedGraph. 1884af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // 1885af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // (2) binds the value 0/1 to the ObjCForCollectionStmt* itself, indicating 1886af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // whether or not the container has any more elements. This value 1887af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // will be tested in ProcessBranch. We need to explicitly bind 1888af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // this value because a container can contain nil elements. 18891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // 1890af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // FIXME: Eventually this logic should actually do dispatches to 1891af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // 'countByEnumeratingWithState:objects:count:' (NSFastEnumeration). 1892af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // This will require simulating a temporary NSFastEnumerationState, either 1893af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // through an SVal or through the use of MemRegions. This value can 1894af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // be affixed to the ObjCForCollectionStmt* instead of 0/1; when the loop 1895af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // terminates we reclaim the temporary (it goes out of scope) and we 1896af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // we can test if the SVal is 0 or if the MemRegion is null (depending 1897af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // on what approach we take). 1898af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // 1899af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // For now: simulate (1) by assigning either a symbol or nil if the 1900af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // container is empty. Thus this transfer function will by default 1901af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // result in state splitting. 19021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 190303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Stmt* elem = S->getElement(); 190406fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek SVal ElementV; 19051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 190603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const DeclStmt* DS = dyn_cast<DeclStmt>(elem)) { 190703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const VarDecl* ElemD = cast<VarDecl>(DS->getSingleDecl()); 1908af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek assert (ElemD->getInit() == 0); 1909d17da2b99f323fa91b01e1dd119cc32e0ee8197dTed Kremenek ElementV = GetState(Pred)->getLValue(ElemD, Pred->getLocationContext()); 191006fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek VisitObjCForCollectionStmtAux(S, Pred, Dst, ElementV); 191106fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek return; 1912af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek } 191306fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 1914031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 1915892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(cast<Expr>(elem), Pred, Tmp); 1916031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I = Tmp.begin(), E = Tmp.end(); I!=E; ++I) { 191706fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek const GRState* state = GetState(*I); 19181397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek VisitObjCForCollectionStmtAux(S, *I, Dst, state->getSVal(elem)); 191906fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek } 192006fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek} 192106fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 1922d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitObjCForCollectionStmtAux(const ObjCForCollectionStmt* S, 1923b317f8f5ca8737a5bbad97a3f7566a2dbd2ed61bZhongxing Xu ExplodedNode* Pred, ExplodedNodeSet& Dst, 192406fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek SVal ElementV) { 192506fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 1926b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // Check if the location we are writing back to is a null pointer. 192703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Stmt* elem = S->getElement(); 1928b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ExplodedNodeSet Tmp; 19299c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLocation(Tmp, elem, Pred, GetState(Pred), ElementV, NULL, false); 1930b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1931b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (Tmp.empty()) 193206fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek return; 1933b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1934b4b817d704287836b52b34369009e682f208aa2bTed Kremenek for (ExplodedNodeSet::iterator NI=Tmp.begin(), NE=Tmp.end(); NI!=NE; ++NI) { 1935b4b817d704287836b52b34369009e682f208aa2bTed Kremenek Pred = *NI; 1936b4b817d704287836b52b34369009e682f208aa2bTed Kremenek const GRState *state = GetState(Pred); 1937b4b817d704287836b52b34369009e682f208aa2bTed Kremenek 1938b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // Handle the case where the container still has elements. 1939c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal TrueV = svalBuilder.makeTruthVal(1); 1940b4b817d704287836b52b34369009e682f208aa2bTed Kremenek const GRState *hasElems = state->BindExpr(S, TrueV); 1941b4b817d704287836b52b34369009e682f208aa2bTed Kremenek 1942b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // Handle the case where the container has no elements. 1943c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal FalseV = svalBuilder.makeTruthVal(0); 1944b4b817d704287836b52b34369009e682f208aa2bTed Kremenek const GRState *noElems = state->BindExpr(S, FalseV); 1945b4b817d704287836b52b34369009e682f208aa2bTed Kremenek 1946b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (loc::MemRegionVal* MV = dyn_cast<loc::MemRegionVal>(&ElementV)) 1947b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (const TypedRegion* R = dyn_cast<TypedRegion>(MV->getRegion())) { 1948b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // FIXME: The proper thing to do is to really iterate over the 1949b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // container. We will do this with dispatch logic to the store. 1950b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // For now, just 'conjure' up a symbolic value. 1951018220c343c103b7dfaa117a7a474c7a7fd6d068Zhongxing Xu QualType T = R->getValueType(); 19527dfc9420babe83e236a47e752f8723bd06070d9dZhanyong Wan assert(Loc::isLocType(T)); 1953b4b817d704287836b52b34369009e682f208aa2bTed Kremenek unsigned Count = Builder->getCurrentBlockCount(); 1954b4b817d704287836b52b34369009e682f208aa2bTed Kremenek SymbolRef Sym = SymMgr.getConjuredSymbol(elem, T, Count); 1955c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.makeLoc(Sym); 1956b4b817d704287836b52b34369009e682f208aa2bTed Kremenek hasElems = hasElems->bindLoc(ElementV, V); 1957b4b817d704287836b52b34369009e682f208aa2bTed Kremenek 1958b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // Bind the location to 'nil' on the false branch. 1959c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal nilV = svalBuilder.makeIntVal(0, T); 1960b4b817d704287836b52b34369009e682f208aa2bTed Kremenek noElems = noElems->bindLoc(ElementV, nilV); 1961b4b817d704287836b52b34369009e682f208aa2bTed Kremenek } 19621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1963b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // Create the new nodes. 1964b4b817d704287836b52b34369009e682f208aa2bTed Kremenek MakeNode(Dst, S, Pred, hasElems); 1965b4b817d704287836b52b34369009e682f208aa2bTed Kremenek MakeNode(Dst, S, Pred, noElems); 1966b4b817d704287836b52b34369009e682f208aa2bTed Kremenek } 1967af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek} 1968af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek 1969af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek//===----------------------------------------------------------------------===// 1970e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Transfer function: Objective-C message expressions. 1971e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1972e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 1973b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremeneknamespace { 1974b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenekclass ObjCMsgWLItem { 1975b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenekpublic: 197603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ObjCMessageExpr::const_arg_iterator I; 1977b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNode *N; 1978b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 197903509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ObjCMsgWLItem(const ObjCMessageExpr::const_arg_iterator &i, ExplodedNode *n) 1980b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek : I(i), N(n) {} 1981b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek}; 1982b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek} // end anonymous namespace 1983b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1984d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitObjCMessageExpr(const ObjCMessageExpr* ME, 198503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ExplodedNode* Pred, 1986892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet& Dst){ 19871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1988b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Create a worklist to process both the arguments. 1989b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek llvm::SmallVector<ObjCMsgWLItem, 20> WL; 1990e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 1991b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // But first evaluate the receiver (if any). 199203509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ObjCMessageExpr::const_arg_iterator AI = ME->arg_begin(), AE = ME->arg_end(); 199303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const Expr *Receiver = ME->getInstanceReceiver()) { 1994b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNodeSet Tmp; 1995b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek Visit(Receiver, Pred, Tmp); 19961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1997b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek if (Tmp.empty()) 1998b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek return; 19991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2000b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) 2001b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek WL.push_back(ObjCMsgWLItem(AI, *I)); 2002b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek } 2003b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek else 2004b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek WL.push_back(ObjCMsgWLItem(AI, Pred)); 20051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2006b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Evaluate the arguments. 2007b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNodeSet ArgsEvaluated; 2008b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek while (!WL.empty()) { 2009b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ObjCMsgWLItem Item = WL.back(); 2010b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek WL.pop_back(); 20111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2012b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek if (Item.I == AE) { 2013b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ArgsEvaluated.insert(Item.N); 2014b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek continue; 2015e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 20161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2017b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Evaluate the subexpression. 2018b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNodeSet Tmp; 20191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2020b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // FIXME: [Objective-C++] handle arguments that are references 2021b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek Visit(*Item.I, Item.N, Tmp); 20221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2023b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Enqueue evaluating the next argument on the worklist. 2024b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ++(Item.I); 2025b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek for (ExplodedNodeSet::iterator NI=Tmp.begin(), NE=Tmp.end(); NI!=NE; ++NI) 2026b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek WL.push_back(ObjCMsgWLItem(Item.I, *NI)); 2027b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek } 2028e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 20295286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis // Now that the arguments are processed, handle the ObjC message. 20305286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis VisitObjCMessage(ME, ArgsEvaluated, Dst); 20315286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis} 20325286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis 20335286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidisvoid ExprEngine::VisitObjCMessage(const ObjCMessage &msg, 20345286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis ExplodedNodeSet &Src, ExplodedNodeSet& Dst) { 20355286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis 20365286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis // Handle the previsits checks. 2037b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNodeSet DstPrevisit; 2038eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreObjCMessage(DstPrevisit, Src, msg,*this); 20391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2040b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Proceed with evaluate the message expression. 20419c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek ExplodedNodeSet dstEval; 20421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2043b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek for (ExplodedNodeSet::iterator DI = DstPrevisit.begin(), 2044b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek DE = DstPrevisit.end(); DI != DE; ++DI) { 204538ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek 20465286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis ExplodedNode *Pred = *DI; 2047c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek bool RaisesException = false; 20489c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek unsigned oldSize = dstEval.size(); 204938ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek SaveAndRestore<bool> OldSink(Builder->BuildSinks); 2050b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek SaveOr OldHasGen(Builder->hasGeneratedNode); 20511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20525286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis if (const Expr *Receiver = msg.getInstanceReceiver()) { 205359fea60cc3dde7a14eeafab9469cb911023fdd7fZhongxing Xu const GRState *state = GetState(Pred); 20542b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis SVal recVal = state->getSVal(Receiver); 20552b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis if (!recVal.isUndef()) { 20562b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // Bifurcate the state into nil and non-nil ones. 20572b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis DefinedOrUnknownSVal receiverVal = cast<DefinedOrUnknownSVal>(recVal); 20582b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis 20592b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis const GRState *notNilState, *nilState; 20602b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis llvm::tie(notNilState, nilState) = state->assume(receiverVal); 20612b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis 20622b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // There are three cases: can be nil or non-nil, must be nil, must be 2063eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // non-nil. We ignore must be nil, and merge the rest two into non-nil. 20642b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis if (nilState && !notNilState) { 2065eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis dstEval.insert(Pred); 20662b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis continue; 20672b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis } 20682b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis 20692b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // Check if the "raise" message was sent. 20702b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis assert(notNilState); 20712b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis if (msg.getSelector() == RaiseSel) 20722b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis RaisesException = true; 20732b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis 20742b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // Check if we raise an exception. For now treat these as sinks. 20752b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // Eventually we will want to handle exceptions properly. 20762b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis if (RaisesException) 20772b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis Builder->BuildSinks = true; 20782b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis 20792b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // Dispatch to plug-in transfer function. 20802b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis evalObjCMessage(dstEval, msg, Pred, notNilState); 2081a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu } 208221fe8370f660a30e3a0493c74728dcb369b9c58bTed Kremenek } 20835286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis else if (const ObjCInterfaceDecl *Iface = msg.getReceiverInterface()) { 208404badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor IdentifierInfo* ClsName = Iface->getIdentifier(); 20855286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis Selector S = msg.getSelector(); 20861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2087c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek // Check for special instance methods. 2088c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek if (!NSExceptionII) { 2089c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek ASTContext& Ctx = getContext(); 2090c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek NSExceptionII = &Ctx.Idents.get("NSException"); 2091c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek } 20921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2093c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek if (ClsName == NSExceptionII) { 2094c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek enum { NUM_RAISE_SELECTORS = 2 }; 20951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2096c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek // Lazily create a cache of the selectors. 2097c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek if (!NSExceptionInstanceRaiseSelectors) { 2098c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek ASTContext& Ctx = getContext(); 2099b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek NSExceptionInstanceRaiseSelectors = 2100b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek new Selector[NUM_RAISE_SELECTORS]; 2101c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek llvm::SmallVector<IdentifierInfo*, NUM_RAISE_SELECTORS> II; 2102c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek unsigned idx = 0; 21031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2104c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek // raise:format: 2105c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek II.push_back(&Ctx.Idents.get("raise")); 2106c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek II.push_back(&Ctx.Idents.get("format")); 2107c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek NSExceptionInstanceRaiseSelectors[idx++] = 2108c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek Ctx.Selectors.getSelector(II.size(), &II[0]); 21091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2110c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek // raise:format::arguments: 2111c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek II.push_back(&Ctx.Idents.get("arguments")); 2112c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek NSExceptionInstanceRaiseSelectors[idx++] = 2113c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek Ctx.Selectors.getSelector(II.size(), &II[0]); 2114c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek } 21151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2116c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek for (unsigned i = 0; i < NUM_RAISE_SELECTORS; ++i) 2117c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek if (S == NSExceptionInstanceRaiseSelectors[i]) { 211838ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek RaisesException = true; 211938ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek break; 2120c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek } 2121e448ab4f9dd162802f5d7cfea60f7830cc61c654Ted Kremenek } 21221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2123a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu // Check if we raise an exception. For now treat these as sinks. 2124a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu // Eventually we will want to handle exceptions properly. 2125a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu if (RaisesException) 2126a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu Builder->BuildSinks = true; 21271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2128a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu // Dispatch to plug-in transfer function. 21295286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis evalObjCMessage(dstEval, msg, Pred, Builder->GetState(Pred)); 2130a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu } 2131b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 213238ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek // Handle the case where no nodes where generated. Auto-generate that 213338ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek // contains the updated state if we aren't generating sinks. 21349c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek if (!Builder->BuildSinks && dstEval.size() == oldSize && 2135b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek !Builder->hasGeneratedNode) 21365286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis MakeNode(dstEval, msg.getOriginExpr(), Pred, GetState(Pred)); 2137c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek } 21381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 213938ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek // Finally, perform the post-condition check of the ObjCMessageExpr and store 214038ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek // the created nodes in 'Dst'. 2141eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPostObjCMessage(Dst, dstEval, msg, *this); 2142de43424560f1a744de6214dab6bbee28ad8437f5Ted Kremenek} 2143de43424560f1a744de6214dab6bbee28ad8437f5Ted Kremenek 2144e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 2145e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Transfer functions: Miscellaneous statements. 2146e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 2147e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 2148d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitCast(const CastExpr *CastE, const Expr *Ex, 2149d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNode *Pred, ExplodedNodeSet &Dst) { 2150892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek 2151031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet S1; 2152892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(Ex, Pred, S1); 2153892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet S2; 2154eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(S2, S1, CastE, *this); 2155892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek 215614429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis if (CastE->getCastKind() == CK_LValueToRValue || 215714429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis CastE->getCastKind() == CK_GetObjCProperty) { 2158892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek for (ExplodedNodeSet::iterator I = S2.begin(), E = S2.end(); I!=E; ++I) { 2159892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNode *subExprNode = *I; 2160892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const GRState *state = GetState(subExprNode); 2161892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek evalLoad(Dst, CastE, subExprNode, state, state->getSVal(Ex)); 2162892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 2163892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek return; 2164892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 2165892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek 2166892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // All other casts. 21675d3003a9d10cc6da4ef716c350bf53c187774c93Ted Kremenek QualType T = CastE->getType(); 2168933c3e1dca3bb88bf113290ef0ade8f5262a89c0Zhongxing Xu QualType ExTy = Ex->getType(); 2169ed340f7d26b3a8fedeb2aebeb5b23429e79d18e0Zhongxing Xu 2170d3118bd7daed36417c8e8bdb0390495a4c829d86Zhongxing Xu if (const ExplicitCastExpr *ExCast=dyn_cast_or_null<ExplicitCastExpr>(CastE)) 217149badde06e066d058d6c7fcf4e628a72999b65a9Douglas Gregor T = ExCast->getTypeAsWritten(); 2172b79b117d3b76da58b14ef835ccfcf2e988b7345fZhongxing Xu 217394ae8fd470471134114599ccfc2301da05719212Ted Kremenek for (ExplodedNodeSet::iterator I = S2.begin(), E = S2.end(); I != E; ++I) { 217494ae8fd470471134114599ccfc2301da05719212Ted Kremenek Pred = *I; 21754fd56816e0925c04f2c92e75399f5c9018d5d6fbZhongxing Xu 217694ae8fd470471134114599ccfc2301da05719212Ted Kremenek switch (CastE->getCastKind()) { 2177f85e193739c953358c865005855253af4f68a497John McCall case CK_LValueToRValue: 2178f85e193739c953358c865005855253af4f68a497John McCall assert(false && "LValueToRValue casts handled earlier."); 2179f85e193739c953358c865005855253af4f68a497John McCall case CK_GetObjCProperty: 2180f85e193739c953358c865005855253af4f68a497John McCall assert(false && "GetObjCProperty casts handled earlier."); 218194ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_ToVoid: 218294ae8fd470471134114599ccfc2301da05719212Ted Kremenek Dst.Add(Pred); 218394ae8fd470471134114599ccfc2301da05719212Ted Kremenek continue; 2184f85e193739c953358c865005855253af4f68a497John McCall // The analyzer doesn't do anything special with these casts, 2185f85e193739c953358c865005855253af4f68a497John McCall // since it understands retain/release semantics already. 2186f85e193739c953358c865005855253af4f68a497John McCall case CK_ObjCProduceObject: 2187f85e193739c953358c865005855253af4f68a497John McCall case CK_ObjCConsumeObject: // Fall-through. 2188f85e193739c953358c865005855253af4f68a497John McCall // True no-ops. 218994ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_NoOp: 219094ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FunctionToPointerDecay: { 219194ae8fd470471134114599ccfc2301da05719212Ted Kremenek // Copy the SVal of Ex to CastE. 219294ae8fd470471134114599ccfc2301da05719212Ted Kremenek const GRState *state = GetState(Pred); 219394ae8fd470471134114599ccfc2301da05719212Ted Kremenek SVal V = state->getSVal(Ex); 219494ae8fd470471134114599ccfc2301da05719212Ted Kremenek state = state->BindExpr(CastE, V); 219594ae8fd470471134114599ccfc2301da05719212Ted Kremenek MakeNode(Dst, CastE, Pred, state); 219694ae8fd470471134114599ccfc2301da05719212Ted Kremenek continue; 219794ae8fd470471134114599ccfc2301da05719212Ted Kremenek } 219894ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_Dependent: 219994ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_ArrayToPointerDecay: 220094ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_BitCast: 220194ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_LValueBitCast: 220294ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralCast: 220394ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_NullToPointer: 220494ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralToPointer: 220594ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_PointerToIntegral: 220694ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_PointerToBoolean: 220794ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralToBoolean: 220894ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralToFloating: 220994ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingToIntegral: 221094ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingToBoolean: 221194ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingCast: 221294ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingRealToComplex: 221394ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingComplexToReal: 221494ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingComplexToBoolean: 221594ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingComplexCast: 221694ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingComplexToIntegralComplex: 221794ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralRealToComplex: 221894ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralComplexToReal: 221994ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralComplexToBoolean: 222094ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralComplexCast: 222194ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralComplexToFloatingComplex: 222294ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_AnyPointerToObjCPointerCast: 222394ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_AnyPointerToBlockPointerCast: 222494ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_ObjCObjectLValueCast: { 222594ae8fd470471134114599ccfc2301da05719212Ted Kremenek // Delegate to SValBuilder to process. 222694ae8fd470471134114599ccfc2301da05719212Ted Kremenek const GRState* state = GetState(Pred); 222794ae8fd470471134114599ccfc2301da05719212Ted Kremenek SVal V = state->getSVal(Ex); 222894ae8fd470471134114599ccfc2301da05719212Ted Kremenek V = svalBuilder.evalCast(V, T, ExTy); 222994ae8fd470471134114599ccfc2301da05719212Ted Kremenek state = state->BindExpr(CastE, V); 223094ae8fd470471134114599ccfc2301da05719212Ted Kremenek MakeNode(Dst, CastE, Pred, state); 223194ae8fd470471134114599ccfc2301da05719212Ted Kremenek continue; 223294ae8fd470471134114599ccfc2301da05719212Ted Kremenek } 223394ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_DerivedToBase: 223494ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_UncheckedDerivedToBase: { 223594ae8fd470471134114599ccfc2301da05719212Ted Kremenek // For DerivedToBase cast, delegate to the store manager. 223694ae8fd470471134114599ccfc2301da05719212Ted Kremenek const GRState *state = GetState(Pred); 223794ae8fd470471134114599ccfc2301da05719212Ted Kremenek SVal val = state->getSVal(Ex); 223894ae8fd470471134114599ccfc2301da05719212Ted Kremenek val = getStoreManager().evalDerivedToBase(val, T); 223994ae8fd470471134114599ccfc2301da05719212Ted Kremenek state = state->BindExpr(CastE, val); 224094ae8fd470471134114599ccfc2301da05719212Ted Kremenek MakeNode(Dst, CastE, Pred, state); 224194ae8fd470471134114599ccfc2301da05719212Ted Kremenek continue; 224294ae8fd470471134114599ccfc2301da05719212Ted Kremenek } 224394ae8fd470471134114599ccfc2301da05719212Ted Kremenek // Various C++ casts that are not handled yet. 22441de4d4e8cb2e9c88809fea8092bc6e835a5473d2John McCall case CK_Dynamic: 224594ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_ToUnion: 224694ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_BaseToDerived: 224794ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_NullToMemberPointer: 224894ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_BaseToDerivedMemberPointer: 224994ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_DerivedToBaseMemberPointer: 225094ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_UserDefinedConversion: 225194ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_ConstructorConversion: 225294ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_VectorSplat: 225394ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_MemberPointerToBoolean: { 225494ae8fd470471134114599ccfc2301da05719212Ted Kremenek // Recover some path-sensitivty by conjuring a new value. 225594ae8fd470471134114599ccfc2301da05719212Ted Kremenek QualType resultType = CastE->getType(); 225694ae8fd470471134114599ccfc2301da05719212Ted Kremenek if (CastE->isLValue()) 225794ae8fd470471134114599ccfc2301da05719212Ted Kremenek resultType = getContext().getPointerType(resultType); 225894ae8fd470471134114599ccfc2301da05719212Ted Kremenek 225994ae8fd470471134114599ccfc2301da05719212Ted Kremenek SVal result = 226094ae8fd470471134114599ccfc2301da05719212Ted Kremenek svalBuilder.getConjuredSymbolVal(NULL, CastE, resultType, 226194ae8fd470471134114599ccfc2301da05719212Ted Kremenek Builder->getCurrentBlockCount()); 226294ae8fd470471134114599ccfc2301da05719212Ted Kremenek 226394ae8fd470471134114599ccfc2301da05719212Ted Kremenek const GRState *state = GetState(Pred)->BindExpr(CastE, result); 226494ae8fd470471134114599ccfc2301da05719212Ted Kremenek MakeNode(Dst, CastE, Pred, state); 226594ae8fd470471134114599ccfc2301da05719212Ted Kremenek continue; 226694ae8fd470471134114599ccfc2301da05719212Ted Kremenek } 22674fd56816e0925c04f2c92e75399f5c9018d5d6fbZhongxing Xu } 2268874d63fc63387365a21775a14c01963b10fde689Ted Kremenek } 22699de04c4415bd31c0c0e888e9ad5673f6c972e12eTed Kremenek} 22709de04c4415bd31c0c0e888e9ad5673f6c972e12eTed Kremenek 2271d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitCompoundLiteralExpr(const CompoundLiteralExpr* CL, 22721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ExplodedNode* Pred, 2273892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet& Dst) { 227403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const InitListExpr* ILE 227503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu = cast<InitListExpr>(CL->getInitializer()->IgnoreParens()); 2276031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 22774f09027385466f1f4c382c80ca77157e2aef97d9Ted Kremenek Visit(ILE, Pred, Tmp); 22781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2279031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I = Tmp.begin(), EI = Tmp.end(); I!=EI; ++I) { 2280a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 22811397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal ILV = state->getSVal(ILE); 228267d1287035767f4f6c8ca0c2bb755990012a44caTed Kremenek const LocationContext *LC = (*I)->getLocationContext(); 228367d1287035767f4f6c8ca0c2bb755990012a44caTed Kremenek state = state->bindCompoundLiteral(CL, LC, ILV); 22844f09027385466f1f4c382c80ca77157e2aef97d9Ted Kremenek 2285892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (CL->isLValue()) { 228667d1287035767f4f6c8ca0c2bb755990012a44caTed Kremenek MakeNode(Dst, CL, *I, state->BindExpr(CL, state->getLValue(CL, LC))); 228767d1287035767f4f6c8ca0c2bb755990012a44caTed Kremenek } 2288f22679e3e5d5f5754931952e58112b4c863a4137Zhongxing Xu else 22898e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, CL, *I, state->BindExpr(CL, ILV)); 22904f09027385466f1f4c382c80ca77157e2aef97d9Ted Kremenek } 22914f09027385466f1f4c382c80ca77157e2aef97d9Ted Kremenek} 22924f09027385466f1f4c382c80ca77157e2aef97d9Ted Kremenek 2293d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitDeclStmt(const DeclStmt *DS, ExplodedNode *Pred, 22941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ExplodedNodeSet& Dst) { 22955b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek 22961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // The CFG has one DeclStmt per Decl. 229703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Decl* D = *DS->decl_begin(); 22981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2299e6c62e3d43728b0a4477fffd543723dd2170af1aTed Kremenek if (!D || !isa<VarDecl>(D)) 23005b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek return; 23011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 23021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const VarDecl* VD = dyn_cast<VarDecl>(D); 23031f19124c70093d2ef0c06eed63ca6080611800a3Zhongxing Xu const Expr* InitEx = VD->getInit(); 23045b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek 23055b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek // FIXME: static variables may have an initializer, but the second 23065b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek // time a function is called those values may not be current. 2307031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 23085b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek 2309f45fbad13ee1f143a2cb6e806fefe22b48f68940Zhongxing Xu if (InitEx) { 2310f45fbad13ee1f143a2cb6e806fefe22b48f68940Zhongxing Xu if (VD->getType()->isReferenceType() && !InitEx->isLValue()) { 231105e539175d9bac678fca8e77665e88b685729850Zhongxing Xu // If the initializer is C++ record type, it should already has a 231205e539175d9bac678fca8e77665e88b685729850Zhongxing Xu // temp object. 231305e539175d9bac678fca8e77665e88b685729850Zhongxing Xu if (!InitEx->getType()->isRecordType()) 231405e539175d9bac678fca8e77665e88b685729850Zhongxing Xu CreateCXXTemporaryObject(InitEx, Pred, Tmp); 231505e539175d9bac678fca8e77665e88b685729850Zhongxing Xu else 231605e539175d9bac678fca8e77665e88b685729850Zhongxing Xu Tmp.Add(Pred); 2317f45fbad13ee1f143a2cb6e806fefe22b48f68940Zhongxing Xu } else 2318f45fbad13ee1f143a2cb6e806fefe22b48f68940Zhongxing Xu Visit(InitEx, Pred, Tmp); 2319f45fbad13ee1f143a2cb6e806fefe22b48f68940Zhongxing Xu } else 2320e6c62e3d43728b0a4477fffd543723dd2170af1aTed Kremenek Tmp.Add(Pred); 23211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2322ae1623345aed43dcd2e069970a00618378a37b34Ted Kremenek ExplodedNodeSet Tmp2; 2323eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(Tmp2, Tmp, DS, *this); 2324b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 2325ae1623345aed43dcd2e069970a00618378a37b34Ted Kremenek for (ExplodedNodeSet::iterator I=Tmp2.begin(), E=Tmp2.end(); I!=E; ++I) { 23265206f0b913d1a11744c9436c83b24f8daa21152cZhongxing Xu ExplodedNode *N = *I; 2327ae1623345aed43dcd2e069970a00618378a37b34Ted Kremenek const GRState *state = GetState(N); 23281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 23295b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek // Decls without InitExpr are not initialized explicitly. 23305206f0b913d1a11744c9436c83b24f8daa21152cZhongxing Xu const LocationContext *LC = N->getLocationContext(); 2331d17da2b99f323fa91b01e1dd119cc32e0ee8197dTed Kremenek 23325b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek if (InitEx) { 23331397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal InitVal = state->getSVal(InitEx); 23341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 233505e539175d9bac678fca8e77665e88b685729850Zhongxing Xu // We bound the temp obj region to the CXXConstructExpr. Now recover 233605e539175d9bac678fca8e77665e88b685729850Zhongxing Xu // the lazy compound value when the variable is not a reference. 233705e539175d9bac678fca8e77665e88b685729850Zhongxing Xu if (AMgr.getLangOptions().CPlusPlus && VD->getType()->isRecordType() && 233805e539175d9bac678fca8e77665e88b685729850Zhongxing Xu !VD->getType()->isReferenceType() && isa<loc::MemRegionVal>(InitVal)){ 233905e539175d9bac678fca8e77665e88b685729850Zhongxing Xu InitVal = state->getSVal(cast<loc::MemRegionVal>(InitVal).getRegion()); 234005e539175d9bac678fca8e77665e88b685729850Zhongxing Xu assert(isa<nonloc::LazyCompoundVal>(InitVal)); 234105e539175d9bac678fca8e77665e88b685729850Zhongxing Xu } 234205e539175d9bac678fca8e77665e88b685729850Zhongxing Xu 23435b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek // Recover some path-sensitivity if a scalar value evaluated to 23445b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek // UnknownVal. 2345a804a68f5a1ad739eb17ff2fd942d12abbc30b08Ted Kremenek if ((InitVal.isUnknown() || 2346a804a68f5a1ad739eb17ff2fd942d12abbc30b08Ted Kremenek !getConstraintManager().canReasonAbout(InitVal)) && 2347a804a68f5a1ad739eb17ff2fd942d12abbc30b08Ted Kremenek !VD->getType()->isReferenceType()) { 2348c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek InitVal = svalBuilder.getConjuredSymbolVal(NULL, InitEx, 23495206f0b913d1a11744c9436c83b24f8daa21152cZhongxing Xu Builder->getCurrentBlockCount()); 23501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 2351b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 23529c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalBind(Dst, DS, *I, state, 2353b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek loc::MemRegionVal(state->getRegion(VD, LC)), InitVal, true); 23541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 23555b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek else { 2356f6f56d4fc8ebce17e7b83eb2c35f57a055c22283Ted Kremenek state = state->bindDeclWithNoInit(state->getRegion(VD, LC)); 23575b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek MakeNode(Dst, DS, *I, state); 23585b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek } 23595b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek } 23605b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek} 2361f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek 2362f75b186893b3461610668dbb627d6f95abead973Ted Kremeneknamespace { 2363f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // This class is used by VisitInitListExpr as an item in a worklist 2364f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // for processing the values contained in an InitListExpr. 2365ba5fb5a955c896815c439289fc51c03cf0635129Kovarththanan Rajaratnamclass InitListWLItem { 2366f75b186893b3461610668dbb627d6f95abead973Ted Kremenekpublic: 2367f75b186893b3461610668dbb627d6f95abead973Ted Kremenek llvm::ImmutableList<SVal> Vals; 2368031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode* N; 236903509aea098772644bf4662dc1c88634818ceeccZhongxing Xu InitListExpr::const_reverse_iterator Itr; 23701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2371031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu InitListWLItem(ExplodedNode* n, llvm::ImmutableList<SVal> vals, 237203509aea098772644bf4662dc1c88634818ceeccZhongxing Xu InitListExpr::const_reverse_iterator itr) 2373f75b186893b3461610668dbb627d6f95abead973Ted Kremenek : Vals(vals), N(n), Itr(itr) {} 2374f75b186893b3461610668dbb627d6f95abead973Ted Kremenek}; 2375f75b186893b3461610668dbb627d6f95abead973Ted Kremenek} 2376f75b186893b3461610668dbb627d6f95abead973Ted Kremenek 2377f75b186893b3461610668dbb627d6f95abead973Ted Kremenek 2378d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitInitListExpr(const InitListExpr* E, ExplodedNode* Pred, 2379031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet& Dst) { 2380c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 2381a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek const GRState* state = GetState(Pred); 238276dba7b67a36b2d6311e4ad4714df5dbd39dbebeTed Kremenek QualType T = getContext().getCanonicalType(E->getType()); 23831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned NumInitElements = E->getNumInits(); 2384c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 2385fb87b89fc9eb103e19fb8e4b925c23f0bd091b99Douglas Gregor if (T->isArrayType() || T->isRecordType() || T->isVectorType()) { 2386a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek llvm::ImmutableList<SVal> StartVals = getBasicVals().getEmptySValList(); 23871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2388a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek // Handle base case where the initializer has no elements. 2389a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek // e.g: static int* myArray[] = {}; 2390a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek if (NumInitElements == 0) { 2391c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.makeCompoundVal(T, StartVals); 23928e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, E, Pred, state->BindExpr(E, V)); 2393a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek return; 23941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 23951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2396a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek // Create a worklist to process the initializers. 2397a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek llvm::SmallVector<InitListWLItem, 10> WorkList; 23981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump WorkList.reserve(NumInitElements); 23991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump WorkList.push_back(InitListWLItem(Pred, StartVals, E->rbegin())); 240003509aea098772644bf4662dc1c88634818ceeccZhongxing Xu InitListExpr::const_reverse_iterator ItrEnd = E->rend(); 2401cf54959eae25fb3050f41833f0eab91042fb1269Ted Kremenek assert(!(E->rbegin() == E->rend())); 24021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2403a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek // Process the worklist until it is empty. 2404f75b186893b3461610668dbb627d6f95abead973Ted Kremenek while (!WorkList.empty()) { 2405f75b186893b3461610668dbb627d6f95abead973Ted Kremenek InitListWLItem X = WorkList.back(); 2406f75b186893b3461610668dbb627d6f95abead973Ted Kremenek WorkList.pop_back(); 24071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2408031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2409f75b186893b3461610668dbb627d6f95abead973Ted Kremenek Visit(*X.Itr, X.N, Tmp); 24101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 241103509aea098772644bf4662dc1c88634818ceeccZhongxing Xu InitListExpr::const_reverse_iterator NewItr = X.Itr + 1; 2412c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 2413bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu for (ExplodedNodeSet::iterator NI=Tmp.begin(),NE=Tmp.end();NI!=NE;++NI) { 2414f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // Get the last initializer value. 2415f75b186893b3461610668dbb627d6f95abead973Ted Kremenek state = GetState(*NI); 24161397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal InitV = state->getSVal(cast<Expr>(*X.Itr)); 24171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2418f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // Construct the new list of values by prepending the new value to 2419f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // the already constructed list. 2420f75b186893b3461610668dbb627d6f95abead973Ted Kremenek llvm::ImmutableList<SVal> NewVals = 2421f75b186893b3461610668dbb627d6f95abead973Ted Kremenek getBasicVals().consVals(InitV, X.Vals); 24221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2423f75b186893b3461610668dbb627d6f95abead973Ted Kremenek if (NewItr == ItrEnd) { 2424a189dcaf0315ce86e76ea1491e739357b6f3f620Zhongxing Xu // Now we have a list holding all init values. Make CompoundValData. 2425c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.makeCompoundVal(T, NewVals); 2426c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 2427f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // Make final state and node. 24288e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, E, *NI, state->BindExpr(E, V)); 2429f75b186893b3461610668dbb627d6f95abead973Ted Kremenek } 2430f75b186893b3461610668dbb627d6f95abead973Ted Kremenek else { 2431f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // Still some initializer values to go. Push them onto the worklist. 2432f75b186893b3461610668dbb627d6f95abead973Ted Kremenek WorkList.push_back(InitListWLItem(*NI, NewVals, NewItr)); 2433f75b186893b3461610668dbb627d6f95abead973Ted Kremenek } 2434f75b186893b3461610668dbb627d6f95abead973Ted Kremenek } 2435f75b186893b3461610668dbb627d6f95abead973Ted Kremenek } 24361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 24378790307d116eef2c23d665ca75d1e44db232117cTed Kremenek return; 2438c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu } 2439c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 24407dfc9420babe83e236a47e752f8723bd06070d9dZhanyong Wan if (Loc::isLocType(T) || T->isIntegerType()) { 2441c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu assert (E->getNumInits() == 1); 2442031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 244303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Init = E->getInit(0); 2444c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu Visit(Init, Pred, Tmp); 2445bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu for (ExplodedNodeSet::iterator I=Tmp.begin(), EI=Tmp.end(); I != EI; ++I) { 2446c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu state = GetState(*I); 24471397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek MakeNode(Dst, E, *I, state->BindExpr(E, state->getSVal(Init))); 2448c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu } 2449c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu return; 2450c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu } 2451c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 2452c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu assert(0 && "unprocessed InitListExpr type"); 2453c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu} 2454f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek 2455f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne/// VisitUnaryExprOrTypeTraitExpr - Transfer function for sizeof(type). 2456f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbournevoid ExprEngine::VisitUnaryExprOrTypeTraitExpr( 2457f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne const UnaryExprOrTypeTraitExpr* Ex, 2458031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode* Pred, 2459031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet& Dst) { 24600518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType T = Ex->getTypeOfArgument(); 24611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2462f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (Ex->getKind() == UETT_SizeOf) { 2463f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (!T->isIncompleteType() && !T->isConstantSizeType()) { 2464b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose assert(T->isVariableArrayType() && "Unknown non-constant-sized type."); 2465b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 2466b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // FIXME: Add support for VLA type arguments, not just VLA expressions. 2467b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // When that happens, we should probably refactor VLASizeChecker's code. 2468b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose if (Ex->isArgumentType()) { 2469b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose Dst.Add(Pred); 2470b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose return; 2471b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose } 2472b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 2473b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // Get the size by getting the extent of the sub-expression. 2474b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // First, visit the sub-expression to find its region. 247503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr *Arg = Ex->getArgumentExpr(); 2476b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose ExplodedNodeSet Tmp; 2477892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(Arg, Pred, Tmp); 2478b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 2479b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 2480b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose const GRState* state = GetState(*I); 2481b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose const MemRegion *MR = state->getSVal(Arg).getAsRegion(); 2482b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 2483b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // If the subexpression can't be resolved to a region, we don't know 2484b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // anything about its size. Just leave the state as is and continue. 2485b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose if (!MR) { 2486b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose Dst.Add(*I); 2487b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose continue; 2488b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose } 2489b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 2490b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // The result is the extent of the VLA. 2491c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal Extent = cast<SubRegion>(MR)->getExtent(svalBuilder); 2492b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose MakeNode(Dst, Ex, *I, state->BindExpr(Ex, Extent)); 2493b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose } 2494b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 249587e8034faf994b1e13143e6e0b5062a38d979d21Ted Kremenek return; 249655f7bcbda37964d3c0e8928d0e50a6e1692b7dceTed Kremenek } 2497c12c5bba6ceb6acd4e51e7a0fc03257da9cfd44eJohn McCall else if (T->getAs<ObjCObjectType>()) { 2498c12c5bba6ceb6acd4e51e7a0fc03257da9cfd44eJohn McCall // Some code tries to take the sizeof an ObjCObjectType, relying that 249955f7bcbda37964d3c0e8928d0e50a6e1692b7dceTed Kremenek // the compiler has laid out its representation. Just report Unknown 25001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // for these. 250161e8e1b84292e882553a47edec830a79606c78f4Ted Kremenek Dst.Add(Pred); 2502f342d1887c9b2ef24d029c0546d536e2277b9976Ted Kremenek return; 250355f7bcbda37964d3c0e8928d0e50a6e1692b7dceTed Kremenek } 250487e8034faf994b1e13143e6e0b5062a38d979d21Ted Kremenek } 2505f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne 2506f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne Expr::EvalResult Result; 2507f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne Ex->Evaluate(Result, getContext()); 2508f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne CharUnits amt = CharUnits::fromQuantity(Result.Val.getInt().getZExtValue()); 25091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25100e561a3e6755c4f248a8bb05d49071ddf4f2ef7bTed Kremenek MakeNode(Dst, Ex, Pred, 2511b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek GetState(Pred)->BindExpr(Ex, 2512c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.makeIntVal(amt.getQuantity(), Ex->getType()))); 2513469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek} 2514469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek 2515d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitOffsetOfExpr(const OffsetOfExpr* OOE, 251603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ExplodedNode* Pred, ExplodedNodeSet& Dst) { 25178ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Expr::EvalResult Res; 25188ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (OOE->Evaluate(Res, getContext()) && Res.Val.isInt()) { 25198ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const APSInt &IV = Res.Val.getInt(); 25208ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor assert(IV.getBitWidth() == getContext().getTypeSize(OOE->getType())); 25218ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor assert(OOE->getType()->isIntegerType()); 2522575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor assert(IV.isSigned() == OOE->getType()->isSignedIntegerOrEnumerationType()); 2523c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal X = svalBuilder.makeIntVal(IV); 25248ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor MakeNode(Dst, OOE, Pred, GetState(Pred)->BindExpr(OOE, X)); 25258ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return; 25268ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 25278ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor // FIXME: Handle the case where __builtin_offsetof is not a constant. 25288ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Dst.Add(Pred); 25298ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor} 2530d8e9f0dc737133d4e8342f39389064620f5a7f8fTed Kremenek 2531d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitUnaryOperator(const UnaryOperator* U, 253203509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ExplodedNode* Pred, 2533892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet& Dst) { 25341b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 2535d8e9f0dc737133d4e8342f39389064620f5a7f8fTed Kremenek switch (U->getOpcode()) { 25361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2537d8e9f0dc737133d4e8342f39389064620f5a7f8fTed Kremenek default: 2538d8e9f0dc737133d4e8342f39389064620f5a7f8fTed Kremenek break; 25391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25402de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Real: { 254103509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = U->getSubExpr()->IgnoreParens(); 2542031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2543b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek Visit(Ex, Pred, Tmp); 25441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2545031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 25461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25471c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu // FIXME: We don't have complex SValues yet. 2548b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek if (Ex->getType()->isAnyComplexType()) { 2549b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek // Just report "Unknown." 2550b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek Dst.Add(*I); 2551b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek continue; 2552b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek } 25531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25542de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall // For all other types, UO_Real is an identity operation. 2555b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek assert (U->getType() == Ex->getType()); 2556a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 25571397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek MakeNode(Dst, U, *I, state->BindExpr(U, state->getSVal(Ex))); 25581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 25591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2560b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek return; 2561b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek } 25621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25632de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Imag: { 25641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 256503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = U->getSubExpr()->IgnoreParens(); 2566031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2567b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek Visit(Ex, Pred, Tmp); 25681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2569031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 25701c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu // FIXME: We don't have complex SValues yet. 2571b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek if (Ex->getType()->isAnyComplexType()) { 2572b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek // Just report "Unknown." 2573b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek Dst.Add(*I); 2574b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek continue; 2575b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek } 25761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25772de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall // For all other types, UO_Imag returns 0. 2578a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 2579c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal X = svalBuilder.makeZeroVal(Ex->getType()); 25808e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, U, *I, state->BindExpr(U, X)); 2581b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek } 25821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2583b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek return; 2584b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek } 25858ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 2586892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek case UO_Plus: 2587892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek assert(!U->isLValue()); 2588892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // FALL-THROUGH. 2589892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek case UO_Deref: 25909c2bac02c1d1204bcf2c5a025ab901d09bc7ae26Zhongxing Xu case UO_AddrOf: 25912de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Extension: { 25921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25931b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Unary "+" is a no-op, similar to a parentheses. We still have places 25941b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // where it may be a block-level expression, so we need to 25951b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // generate an extra node that just propagates the value of the 25961b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // subexpression. 25971b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 259803509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = U->getSubExpr()->IgnoreParens(); 2599031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2600892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(Ex, Pred, Tmp); 26011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 2603a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 26041397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek MakeNode(Dst, U, *I, state->BindExpr(U, state->getSVal(Ex))); 26051b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26071b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek return; 26081b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26102de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_LNot: 26112de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 26122de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Not: { 2613892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek assert (!U->isLValue()); 261403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = U->getSubExpr()->IgnoreParens(); 2615031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 26161b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek Visit(Ex, Pred, Tmp); 26171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 2619a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 26201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2621855cd903beadc056ea300464b46c6c46b91d290fTed Kremenek // Get the value of the subexpression. 26221397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getSVal(Ex); 2623855cd903beadc056ea300464b46c6c46b91d290fTed Kremenek 2624e04a5cb9afb5faa205c0bfa93103d6df691e05b2Ted Kremenek if (V.isUnknownOrUndef()) { 26258e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, U, *I, state->BindExpr(U, V)); 2626e04a5cb9afb5faa205c0bfa93103d6df691e05b2Ted Kremenek continue; 2627e04a5cb9afb5faa205c0bfa93103d6df691e05b2Ted Kremenek } 26281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 262960595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// QualType DstT = getContext().getCanonicalType(U->getType()); 263060595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// QualType SrcT = getContext().getCanonicalType(Ex->getType()); 26311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump// 263260595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// if (DstT != SrcT) // Perform promotions. 26339c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek// V = evalCast(V, DstT); 26341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump// 263560595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// if (V.isUnknownOrUndef()) { 263660595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// MakeNode(Dst, U, *I, BindExpr(St, U, V)); 263760595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// continue; 263860595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// } 26391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26401b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek switch (U->getOpcode()) { 26411b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek default: 26421b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek assert(false && "Invalid Opcode."); 26431b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek break; 26441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26452de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Not: 264660a6e0ce72a24d6247602625c631fc3dc7bfd8d4Ted Kremenek // FIXME: Do we need to handle promotions? 26479c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek state = state->BindExpr(U, evalComplement(cast<NonLoc>(V))); 26481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump break; 26491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26502de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 265160a6e0ce72a24d6247602625c631fc3dc7bfd8d4Ted Kremenek // FIXME: Do we need to handle promotions? 26529c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek state = state->BindExpr(U, evalMinus(cast<NonLoc>(V))); 26531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump break; 26541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26552de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_LNot: 26561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26571b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // C99 6.5.3.3: "The expression !E is equivalent to (0==E)." 26581b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // 26591b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Note: technically we do "E == 0", but this is the same in the 26601b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // transfer functions as "0 == E". 26616c07bdba93b095b66e2c8c82dd5ed458fa8285eaTed Kremenek SVal Result; 26621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26631c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu if (isa<Loc>(V)) { 2664c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek Loc X = svalBuilder.makeNull(); 26659c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek Result = evalBinOp(state, BO_EQ, cast<Loc>(V), X, 26666c07bdba93b095b66e2c8c82dd5ed458fa8285eaTed Kremenek U->getType()); 26671b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26681b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek else { 266960595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek nonloc::ConcreteInt X(getBasicVals().getValue(0, Ex->getType())); 26709c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek Result = evalBinOp(state, BO_EQ, cast<NonLoc>(V), X, 26716c07bdba93b095b66e2c8c82dd5ed458fa8285eaTed Kremenek U->getType()); 26721b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26748e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek state = state->BindExpr(U, Result); 26751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26761b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek break; 26771b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2679a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek MakeNode(Dst, U, *I, state); 26801b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26821b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek return; 26831b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26847b8009a3e3a1479203d315b74712552a4ce3e200Ted Kremenek } 26852ad886836c3a9111f24144a8fe5da3d72958a01cTed Kremenek 26861b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Handle ++ and -- (both pre- and post-increment). 26871b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek assert (U->isIncrementDecrementOp()); 2688031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 268903509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = U->getSubExpr()->IgnoreParens(); 2690892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(Ex, Pred, Tmp); 26911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2692031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I = Tmp.begin(), E = Tmp.end(); I!=E; ++I) { 26931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2694a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 2695250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu SVal loc = state->getSVal(Ex); 26961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Perform a load. 2698031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp2; 2699250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu evalLoad(Tmp2, Ex, *I, state, loc); 2700540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek 2701bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu for (ExplodedNodeSet::iterator I2=Tmp2.begin(), E2=Tmp2.end();I2!=E2;++I2) { 27021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2703a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek state = GetState(*I2); 27041397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V2_untested = state->getSVal(Ex); 27051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 27061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Propagate unknown and undefined values. 27075b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek if (V2_untested.isUnknownOrUndef()) { 27085b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek MakeNode(Dst, U, *I2, state->BindExpr(U, V2_untested)); 27091b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek continue; 2710b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek } 27115b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek DefinedSVal V2 = cast<DefinedSVal>(V2_untested); 27121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 27131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Handle all other values. 27142de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall BinaryOperator::Opcode Op = U->isIncrementOp() ? BO_Add 27152de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall : BO_Sub; 271621028dd8850c64a414f7a82dfddcc291351203d6Ted Kremenek 2717a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu // If the UnaryOperator has non-location type, use its type to create the 2718a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu // constant value. If the UnaryOperator has location type, create the 2719a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu // constant with int type and pointer width. 2720a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu SVal RHS; 2721a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu 2722a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu if (U->getType()->isAnyPointerType()) 2723a6b0b96e5376cd9cf182a3e240e0537feed43cdeTed Kremenek RHS = svalBuilder.makeArrayIndex(1); 2724a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu else 2725c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek RHS = svalBuilder.makeIntVal(1, U->getType()); 2726a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu 27279c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek SVal Result = evalBinOp(state, Op, V2, RHS, U->getType()); 27281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2729bb9b2711ded08d39f9c9aa08b06ac5e288f32c62Ted Kremenek // Conjure a new symbol if necessary to recover precision. 2730af48fdd35633f53c74e982ba7922ca7b2051c1f5Ted Kremenek if (Result.isUnknown() || !getConstraintManager().canReasonAbout(Result)){ 27315b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek DefinedOrUnknownSVal SymVal = 2732c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.getConjuredSymbolVal(NULL, Ex, 27338780679b02bea5ab6360f3f8ebf3b221aaeda93fTed Kremenek Builder->getCurrentBlockCount()); 27345b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek Result = SymVal; 27351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2736af48fdd35633f53c74e982ba7922ca7b2051c1f5Ted Kremenek // If the value is a location, ++/-- should always preserve 27376c07bdba93b095b66e2c8c82dd5ed458fa8285eaTed Kremenek // non-nullness. Check if the original value was non-null, and if so 27381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // propagate that constraint. 27397dfc9420babe83e236a47e752f8723bd06070d9dZhanyong Wan if (Loc::isLocType(U->getType())) { 27405b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek DefinedOrUnknownSVal Constraint = 2741250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu svalBuilder.evalEQ(state, V2,svalBuilder.makeZeroVal(U->getType())); 27421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 274328f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (!state->assume(Constraint, true)) { 2744af48fdd35633f53c74e982ba7922ca7b2051c1f5Ted Kremenek // It isn't feasible for the original value to be null. 2745af48fdd35633f53c74e982ba7922ca7b2051c1f5Ted Kremenek // Propagate this constraint. 27469c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek Constraint = svalBuilder.evalEQ(state, SymVal, 2747c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.makeZeroVal(U->getType())); 27485b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek 27491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 275028f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek state = state->assume(Constraint, false); 2751a591bc04d21fa62ebffcb2c7814d738ca8f5e2f9Ted Kremenek assert(state); 27521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 27531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 2754af48fdd35633f53c74e982ba7922ca7b2051c1f5Ted Kremenek } 27551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2756250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu // Since the lvalue-to-rvalue conversion is explicit in the AST, 2757250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu // we bind an l-value if the operator is prefix and an lvalue (in C++). 2758b08624414a923e0df93dd7630fee51b0ff3cb7b1Zhongxing Xu if (U->isLValue()) 2759250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu state = state->BindExpr(U, loc); 2760250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu else 2761ce30688b8aa0effd70a7a69a4d1e3d6a2a86efcdTed Kremenek state = state->BindExpr(U, U->isPostfix() ? V2 : Result); 27621b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 27631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Perform the store. 2764250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu evalStore(Dst, NULL, U, *I2, state, loc, Result); 27655b6dc2d72bf1bcf2b61fe5dbcd57bfa4aee76b29Ted Kremenek } 2766469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek } 27675b6dc2d72bf1bcf2b61fe5dbcd57bfa4aee76b29Ted Kremenek} 27685b6dc2d72bf1bcf2b61fe5dbcd57bfa4aee76b29Ted Kremenek 2769d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitAsmStmt(const AsmStmt* A, ExplodedNode* Pred, 2770bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu ExplodedNodeSet& Dst) { 2771ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek VisitAsmStmtHelperOutputs(A, A->begin_outputs(), A->end_outputs(), Pred, Dst); 27721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 2773ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek 2774d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitAsmStmtHelperOutputs(const AsmStmt* A, 277503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu AsmStmt::const_outputs_iterator I, 277603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu AsmStmt::const_outputs_iterator E, 2777bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu ExplodedNode* Pred, ExplodedNodeSet& Dst) { 2778ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek if (I == E) { 2779ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek VisitAsmStmtHelperInputs(A, A->begin_inputs(), A->end_inputs(), Pred, Dst); 2780ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek return; 2781ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek } 27821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2783031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2784892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(*I, Pred, Tmp); 2785ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek ++I; 27861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2787bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu for (ExplodedNodeSet::iterator NI = Tmp.begin(), NE = Tmp.end();NI != NE;++NI) 2788ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek VisitAsmStmtHelperOutputs(A, I, E, *NI, Dst); 2789ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek} 2790ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek 2791d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitAsmStmtHelperInputs(const AsmStmt* A, 279203509aea098772644bf4662dc1c88634818ceeccZhongxing Xu AsmStmt::const_inputs_iterator I, 279303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu AsmStmt::const_inputs_iterator E, 2794b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNode* Pred, 2795bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu ExplodedNodeSet& Dst) { 2796ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek if (I == E) { 27971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2798ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek // We have processed both the inputs and the outputs. All of the outputs 27991c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu // should evaluate to Locs. Nuke all of their values. 28001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2801ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek // FIXME: Some day in the future it would be nice to allow a "plug-in" 2802ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek // which interprets the inline asm and stores proper results in the 2803ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek // outputs. 28041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2805a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(Pred); 28061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 280703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu for (AsmStmt::const_outputs_iterator OI = A->begin_outputs(), 2808ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek OE = A->end_outputs(); OI != OE; ++OI) { 28091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 28101397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal X = state->getSVal(*OI); 28111c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu assert (!isa<NonLoc>(X)); // Should be an Lval, or unknown, undef. 28121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 28131c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu if (isa<Loc>(X)) 28143ff12591494a3cb3d3a24427975df58714ac3b2fTed Kremenek state = state->bindLoc(cast<Loc>(X), UnknownVal()); 2815ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek } 28161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2817a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek MakeNode(Dst, A, Pred, state); 2818ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek return; 2819ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek } 28201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2821031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2822ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek Visit(*I, Pred, Tmp); 28231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2824ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek ++I; 28251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2826e1ccccff777f6bad6b25e9c6a762f98fd8003181Ted Kremenek for (ExplodedNodeSet::iterator NI = Tmp.begin(), NE = Tmp.end(); NI!=NE; ++NI) 2827ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek VisitAsmStmtHelperInputs(A, I, E, *NI, Dst); 2828ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek} 2829ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek 2830d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitReturnStmt(const ReturnStmt *RS, ExplodedNode *Pred, 28311053d246f451c399468248625d1146e3d845e21eTed Kremenek ExplodedNodeSet &Dst) { 28321053d246f451c399468248625d1146e3d845e21eTed Kremenek ExplodedNodeSet Src; 283303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const Expr *RetE = RS->getRetValue()) { 2834bd2b2084e58577f17308f910770a5563a344251aZhongxing Xu // Record the returned expression in the state. It will be used in 2835e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenek // processCallExit to bind the return value to the call expr. 28366190ec29f0895185bbec95a932429b8832917fecZhongxing Xu { 2837b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek static int tag = 0; 28386190ec29f0895185bbec95a932429b8832917fecZhongxing Xu const GRState *state = GetState(Pred); 28396190ec29f0895185bbec95a932429b8832917fecZhongxing Xu state = state->set<ReturnExpr>(RetE); 2840b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek Pred = Builder->generateNode(RetE, state, Pred, &tag); 28416190ec29f0895185bbec95a932429b8832917fecZhongxing Xu } 28426190ec29f0895185bbec95a932429b8832917fecZhongxing Xu // We may get a NULL Pred because we generated a cached node. 28436190ec29f0895185bbec95a932429b8832917fecZhongxing Xu if (Pred) 28446190ec29f0895185bbec95a932429b8832917fecZhongxing Xu Visit(RetE, Pred, Src); 284502737ed29d7fff2206f7c7ee958cdf0665e35542Ted Kremenek } 28461053d246f451c399468248625d1146e3d845e21eTed Kremenek else { 28471053d246f451c399468248625d1146e3d845e21eTed Kremenek Src.Add(Pred); 28481053d246f451c399468248625d1146e3d845e21eTed Kremenek } 2849b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 28501053d246f451c399468248625d1146e3d845e21eTed Kremenek ExplodedNodeSet CheckedSet; 2851eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(CheckedSet, Src, RS, *this); 2852b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 28531053d246f451c399468248625d1146e3d845e21eTed Kremenek for (ExplodedNodeSet::iterator I = CheckedSet.begin(), E = CheckedSet.end(); 28541053d246f451c399468248625d1146e3d845e21eTed Kremenek I != E; ++I) { 28556b31e8ed11721505645860f40486e091ecd23dd0Ted Kremenek 2856d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis assert(Builder && "StmtNodeBuilder must be defined."); 2857b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 28581053d246f451c399468248625d1146e3d845e21eTed Kremenek Pred = *I; 28591053d246f451c399468248625d1146e3d845e21eTed Kremenek unsigned size = Dst.size(); 2860b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 28611053d246f451c399468248625d1146e3d845e21eTed Kremenek SaveAndRestore<bool> OldSink(Builder->BuildSinks); 2862b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek SaveOr OldHasGen(Builder->hasGeneratedNode); 2863b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 28649c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek getTF().evalReturn(Dst, *this, *Builder, RS, Pred); 2865b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 2866b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Handle the case where no nodes where generated. 2867b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek if (!Builder->BuildSinks && Dst.size() == size && 2868b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek !Builder->hasGeneratedNode) 28691053d246f451c399468248625d1146e3d845e21eTed Kremenek MakeNode(Dst, RS, Pred, GetState(Pred)); 28705917d7894e8274b9625275dd4dd86c5d0040a242Ted Kremenek } 287102737ed29d7fff2206f7c7ee958cdf0665e35542Ted Kremenek} 287255deb97341819080d6d127d29e25b9502e4f2e3cTed Kremenek 2873e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 2874e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Transfer functions: Binary operators. 2875e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 2876e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 2877d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitBinaryOperator(const BinaryOperator* B, 2878031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode* Pred, 2879892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet& Dst) { 2880031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp1; 28811b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek Expr* LHS = B->getLHS()->IgnoreParens(); 28821b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek Expr* RHS = B->getRHS()->IgnoreParens(); 28831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2884892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(LHS, Pred, Tmp1); 2885668399b23cf18124c8c8c41a14a7712212f6fa45Zhongxing Xu ExplodedNodeSet Tmp3; 2886668399b23cf18124c8c8c41a14a7712212f6fa45Zhongxing Xu 2887e1ccccff777f6bad6b25e9c6a762f98fd8003181Ted Kremenek for (ExplodedNodeSet::iterator I1=Tmp1.begin(), E1=Tmp1.end(); I1!=E1; ++I1) { 288859fea60cc3dde7a14eeafab9469cb911023fdd7fZhongxing Xu SVal LeftV = GetState(*I1)->getSVal(LHS); 2889031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp2; 28901b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek Visit(RHS, *I1, Tmp2); 28916403b57eda05a22273d920ad0bd2991d11eaa7b8Zhongxing Xu 28926403b57eda05a22273d920ad0bd2991d11eaa7b8Zhongxing Xu ExplodedNodeSet CheckedSet; 2893eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(CheckedSet, Tmp2, B, *this); 28941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 28951b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // With both the LHS and RHS evaluated, process the operation itself. 28961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 28971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ExplodedNodeSet::iterator I2=CheckedSet.begin(), E2=CheckedSet.end(); 28986403b57eda05a22273d920ad0bd2991d11eaa7b8Zhongxing Xu I2 != E2; ++I2) { 2899cf78b6a771bb4537d5ee8fa44e718e842c2f70c7Ted Kremenek 29005b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek const GRState *state = GetState(*I2); 29011397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal RightV = state->getSVal(RHS); 29021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29035b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek BinaryOperator::Opcode Op = B->getOpcode(); 29041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29052de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (Op == BO_Assign) { 290673af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // EXPERIMENTAL: "Conjured" symbols. 290773af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // FIXME: Handle structs. 29080e82a936389ead8f22077d5b021cab4ab7bd9899Ted Kremenek if (RightV.isUnknown() ||!getConstraintManager().canReasonAbout(RightV)) 29090e82a936389ead8f22077d5b021cab4ab7bd9899Ted Kremenek { 291073af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu unsigned Count = Builder->getCurrentBlockCount(); 2911c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek RightV = svalBuilder.getConjuredSymbolVal(NULL, B->getRHS(), Count); 2912ab2b8c54bca82866876f91e756788916d3fa20c3Ted Kremenek } 2913662174ca204cb520f634bdcb34a3708f45389d14Zhongxing Xu 2914892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal ExprVal = B->isLValue() ? LeftV : RightV; 2915662174ca204cb520f634bdcb34a3708f45389d14Zhongxing Xu 291673af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // Simulate the effects of a "store": bind the value of the RHS 291773af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // to the L-Value represented by the LHS. 29189c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalStore(Tmp3, B, LHS, *I2, state->BindExpr(B, ExprVal), LeftV,RightV); 291973af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu continue; 292073af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu } 2921b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 292273af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu if (!B->isAssignmentOp()) { 292373af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // Process non-assignments except commas or short-circuited 292473af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // logical expressions (LAnd and LOr). 29259c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek SVal Result = evalBinOp(state, Op, LeftV, RightV, B->getType()); 2926b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 292773af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu if (Result.isUnknown()) { 292896ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek MakeNode(Tmp3, B, *I2, state); 292973af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu continue; 293073af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu } 2931b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 293273af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu state = state->BindExpr(B, Result); 2933b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 2934668399b23cf18124c8c8c41a14a7712212f6fa45Zhongxing Xu MakeNode(Tmp3, B, *I2, state); 293573af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu continue; 29361b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 29371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29381b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek assert (B->isCompoundAssignmentOp()); 29391b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 2940cad2996edf303978932c621ab02729dc11debb81Ted Kremenek switch (Op) { 2941cad2996edf303978932c621ab02729dc11debb81Ted Kremenek default: 2942cad2996edf303978932c621ab02729dc11debb81Ted Kremenek assert(0 && "Invalid opcode for compound assignment."); 29432de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_MulAssign: Op = BO_Mul; break; 29442de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_DivAssign: Op = BO_Div; break; 29452de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_RemAssign: Op = BO_Rem; break; 29462de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_AddAssign: Op = BO_Add; break; 29472de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_SubAssign: Op = BO_Sub; break; 29482de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_ShlAssign: Op = BO_Shl; break; 29492de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_ShrAssign: Op = BO_Shr; break; 29502de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_AndAssign: Op = BO_And; break; 29512de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_XorAssign: Op = BO_Xor; break; 29522de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_OrAssign: Op = BO_Or; break; 2953934e3e93eface34e73257a4a80cc6752edd588ceTed Kremenek } 29541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29551b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Perform a load (the LHS). This performs the checks for 29561b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // null dereferences, and so on. 2957c39b2bdd4cef51021fe90de91c9fb6d1a15f4d0aZhongxing Xu ExplodedNodeSet Tmp4; 29581397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal location = state->getSVal(LHS); 29599c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLoad(Tmp4, LHS, *I2, state, location); 29601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2961c39b2bdd4cef51021fe90de91c9fb6d1a15f4d0aZhongxing Xu for (ExplodedNodeSet::iterator I4=Tmp4.begin(), E4=Tmp4.end(); I4!=E4; 2962c39b2bdd4cef51021fe90de91c9fb6d1a15f4d0aZhongxing Xu ++I4) { 2963c39b2bdd4cef51021fe90de91c9fb6d1a15f4d0aZhongxing Xu state = GetState(*I4); 29641397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getSVal(LHS); 29651b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 29661b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Get the computation type. 296732c3fa4195762ba93f0b7114ab36c0941bc34432Ted Kremenek QualType CTy = 296832c3fa4195762ba93f0b7114ab36c0941bc34432Ted Kremenek cast<CompoundAssignOperator>(B)->getComputationResultType(); 296960595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek CTy = getContext().getCanonicalType(CTy); 2970ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman 297132c3fa4195762ba93f0b7114ab36c0941bc34432Ted Kremenek QualType CLHSTy = 297232c3fa4195762ba93f0b7114ab36c0941bc34432Ted Kremenek cast<CompoundAssignOperator>(B)->getComputationLHSType(); 297332c3fa4195762ba93f0b7114ab36c0941bc34432Ted Kremenek CLHSTy = getContext().getCanonicalType(CLHSTy); 2974ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman 297560595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek QualType LTy = getContext().getCanonicalType(LHS->getType()); 2976ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman 2977ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman // Promote LHS. 29789c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek V = svalBuilder.evalCast(V, CLHSTy, LTy); 2979ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman 29801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Compute the result of the operation. 29819c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek SVal Result = svalBuilder.evalCast(evalBinOp(state, Op, V, RightV, CTy), 2982814e6b915450456eb2a1ba15d82fc7f8ae3bc8a6Zhongxing Xu B->getType(), CTy); 29831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29849ff267d0d6b8249a017fca0b56a0c5a6bcb7ef8aTed Kremenek // EXPERIMENTAL: "Conjured" symbols. 29859ff267d0d6b8249a017fca0b56a0c5a6bcb7ef8aTed Kremenek // FIXME: Handle structs. 29861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 298760595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek SVal LHSVal; 29881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29890e82a936389ead8f22077d5b021cab4ab7bd9899Ted Kremenek if (Result.isUnknown() || 29900e82a936389ead8f22077d5b021cab4ab7bd9899Ted Kremenek !getConstraintManager().canReasonAbout(Result)) { 29911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29929ff267d0d6b8249a017fca0b56a0c5a6bcb7ef8aTed Kremenek unsigned Count = Builder->getCurrentBlockCount(); 29931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 299460595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek // The symbolic value is actually for the type of the left-hand side 299560595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek // expression, not the computation type, as this is the value the 299660595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek // LValue on the LHS will bind to. 2997c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek LHSVal = svalBuilder.getConjuredSymbolVal(NULL, B->getRHS(), LTy, Count); 29981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29991c0c23325312df5d40fe788ffcb48484f190e9a3Zhongxing Xu // However, we need to convert the symbol to the computation type. 30009c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek Result = svalBuilder.evalCast(LHSVal, CTy, LTy); 30019ff267d0d6b8249a017fca0b56a0c5a6bcb7ef8aTed Kremenek } 300260595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek else { 300360595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek // The left-hand side may bind to a different value then the 300460595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek // computation type. 30059c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek LHSVal = svalBuilder.evalCast(Result, LTy, CTy); 300660595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek } 30071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3008f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu // In C++, assignment and compound assignment operators return an 3009f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu // lvalue. 3010f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu if (B->isLValue()) 3011f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu state = state->BindExpr(B, location); 3012f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu else 3013f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu state = state->BindExpr(B, Result); 3014f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu 3015f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu evalStore(Tmp3, B, LHS, *I4, state, location, LHSVal); 3016ab2b8c54bca82866876f91e756788916d3fa20c3Ted Kremenek } 3017cb448ca8b372710d48a232fddcec615164eee574Ted Kremenek } 3018d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek } 3019668399b23cf18124c8c8c41a14a7712212f6fa45Zhongxing Xu 3020eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPostStmt(Dst, Tmp3, B, *this); 3021094bef56a7900f13bb777f9a352704104b1458e7Ted Kremenek} 3022094bef56a7900f13bb777f9a352704104b1458e7Ted Kremenek 3023094bef56a7900f13bb777f9a352704104b1458e7Ted Kremenek//===----------------------------------------------------------------------===// 3024e01c98767dfd7153c3c84637c36659e3bbe16ff7Ted Kremenek// Visualization. 3025ee98546b0d5f3439c4a590b0d7d1545af794a0ecTed Kremenek//===----------------------------------------------------------------------===// 3026ee98546b0d5f3439c4a590b0d7d1545af794a0ecTed Kremenek 3027aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek#ifndef NDEBUG 3028d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisstatic ExprEngine* GraphPrintCheckerState; 3029e97ca065c91ff9ca2a2a42eb443eaa553c40441cTed Kremenekstatic SourceManager* GraphPrintSourceManager; 30303b4f6702860208692f6ef28401e68de4e3ff9af9Ted Kremenek 3031aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremeneknamespace llvm { 3032aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenektemplate<> 303347491f8b7adf9d42a404d44c073e8a5308fa6cfcDouglas Gregorstruct DOTGraphTraits<ExplodedNode*> : 3034aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek public DefaultDOTGraphTraits { 3035006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser 3036006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {} 3037006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser 3038d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis // FIXME: Since we do not cache error nodes in ExprEngine now, this does not 3039ec9227fea66c3439991fc84b0d33b0a8b4b8875eZhongxing Xu // work. 3040031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu static std::string getNodeAttributes(const ExplodedNode* N, void*) { 30411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 304210f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#if 0 304310f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // FIXME: Replace with a general scheme to tell if the node is 304410f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // an error node. 3045a3fadfcce5911742801a302cac82d4fe54d5c682Ted Kremenek if (GraphPrintCheckerState->isImplicitNullDeref(N) || 30469dca062461a6244cf0f733346657fa3eee853f9bTed Kremenek GraphPrintCheckerState->isExplicitNullDeref(N) || 30474a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek GraphPrintCheckerState->isUndefDeref(N) || 30484a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek GraphPrintCheckerState->isUndefStore(N) || 30494a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek GraphPrintCheckerState->isUndefControlFlow(N) || 30505e03fcb5420c33207433dd6f800588e256dd9bdbTed Kremenek GraphPrintCheckerState->isUndefResult(N) || 30512ded35a576e3899553ea0ccfcbf5cbdb3d8cf664Ted Kremenek GraphPrintCheckerState->isBadCall(N) || 30522ded35a576e3899553ea0ccfcbf5cbdb3d8cf664Ted Kremenek GraphPrintCheckerState->isUndefArg(N)) 3053a3fadfcce5911742801a302cac82d4fe54d5c682Ted Kremenek return "color=\"red\",style=\"filled\""; 30541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 30558cc13ea74fea1c04042a2f4087665bc5182e8408Ted Kremenek if (GraphPrintCheckerState->isNoReturnCall(N)) 30568cc13ea74fea1c04042a2f4087665bc5182e8408Ted Kremenek return "color=\"blue\",style=\"filled\""; 30572055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu#endif 3058a3fadfcce5911742801a302cac82d4fe54d5c682Ted Kremenek return ""; 3059a3fadfcce5911742801a302cac82d4fe54d5c682Ted Kremenek } 30601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3061006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser static std::string getNodeLabel(const ExplodedNode* N, void*){ 30621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 306353ba0b636194dbeaa65a6f85316c9397a0c5298bTed Kremenek std::string sbuf; 306453ba0b636194dbeaa65a6f85316c9397a0c5298bTed Kremenek llvm::raw_string_ostream Out(sbuf); 3065803c9edd06e8f936821525d36b1d8cc131e37d44Ted Kremenek 3066803c9edd06e8f936821525d36b1d8cc131e37d44Ted Kremenek // Program Location. 3067aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek ProgramPoint Loc = N->getLocation(); 30681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3069aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek switch (Loc.getKind()) { 3070aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek case ProgramPoint::BlockEntranceKind: 30711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Out << "Block Entrance: B" 3072aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek << cast<BlockEntrance>(Loc).getBlock()->getBlockID(); 3073aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek break; 30741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3075aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek case ProgramPoint::BlockExitKind: 3076aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek assert (false); 3077aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek break; 30781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3079102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor case ProgramPoint::CallEnterKind: 3080102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor Out << "CallEnter"; 3081102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor break; 3082102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor 3083102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor case ProgramPoint::CallExitKind: 3084102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor Out << "CallExit"; 3085102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor break; 3086102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor 3087aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek default: { 30885f85e17df3f5b0a8021443f2b590daecfb2cbd17Ted Kremenek if (StmtPoint *L = dyn_cast<StmtPoint>(&Loc)) { 30895f85e17df3f5b0a8021443f2b590daecfb2cbd17Ted Kremenek const Stmt* S = L->getStmt(); 30908c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek SourceLocation SLoc = S->getLocStart(); 30918c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek 30921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Out << S->getStmtClassName() << ' ' << (void*) S << ' '; 3093e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner LangOptions LO; // FIXME. 3094e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner S->printPretty(Out, 0, PrintingPolicy(LO)); 30951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 30961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (SLoc.isFileID()) { 30978c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\lline=" 30987da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << GraphPrintSourceManager->getInstantiationLineNumber(SLoc) 30997da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << " col=" 31007da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << GraphPrintSourceManager->getInstantiationColumnNumber(SLoc) 31017da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << "\\l"; 31028c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek } 31031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 31045f85e17df3f5b0a8021443f2b590daecfb2cbd17Ted Kremenek if (isa<PreStmt>(Loc)) 31051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Out << "\\lPreStmt\\l;"; 31065f85e17df3f5b0a8021443f2b590daecfb2cbd17Ted Kremenek else if (isa<PostLoad>(Loc)) 31077090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek Out << "\\lPostLoad\\l;"; 31087090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek else if (isa<PostStore>(Loc)) 31097090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek Out << "\\lPostStore\\l"; 31107090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek else if (isa<PostLValue>(Loc)) 31117090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek Out << "\\lPostLValue\\l"; 31121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 311310f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#if 0 311410f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // FIXME: Replace with a general scheme to determine 311510f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // the name of the check. 31168c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek if (GraphPrintCheckerState->isImplicitNullDeref(N)) 31178c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Implicit-Null Dereference.\\l"; 31188c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isExplicitNullDeref(N)) 31198c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Explicit-Null Dereference.\\l"; 31208c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isUndefDeref(N)) 31218c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Dereference of undefialied value.\\l"; 31228c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isUndefStore(N)) 31238c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Store to Undefined Loc."; 31248c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isUndefResult(N)) 31258c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Result of operation is undefined."; 31268c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isNoReturnCall(N)) 31278c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Call to function marked \"noreturn\"."; 31288c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isBadCall(N)) 31298c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Call to NULL/Undefined."; 31308c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isUndefArg(N)) 31318c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Argument in call is undefined"; 313210f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#endif 31331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 31348c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek break; 31358c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek } 31368c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek 3137aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek const BlockEdge& E = cast<BlockEdge>(Loc); 3138aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek Out << "Edge: (B" << E.getSrc()->getBlockID() << ", B" 3139aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek << E.getDst()->getBlockID() << ')'; 31401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 314103509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const Stmt* T = E.getSrc()->getTerminator()) { 31421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3143e97ca065c91ff9ca2a2a42eb443eaa553c40441cTed Kremenek SourceLocation SLoc = T->getLocStart(); 31441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3145b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek Out << "\\|Terminator: "; 3146e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner LangOptions LO; // FIXME. 3147e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner E.getSrc()->printTerminator(Out, LO); 31481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 31499b5551d7f0209cec8b9c555cf70e893940674e5cTed Kremenek if (SLoc.isFileID()) { 31509b5551d7f0209cec8b9c555cf70e893940674e5cTed Kremenek Out << "\\lline=" 31517da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << GraphPrintSourceManager->getInstantiationLineNumber(SLoc) 31527da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << " col=" 31537da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << GraphPrintSourceManager->getInstantiationColumnNumber(SLoc); 31549b5551d7f0209cec8b9c555cf70e893940674e5cTed Kremenek } 31551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3156daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek if (isa<SwitchStmt>(T)) { 315703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Stmt* Label = E.getDst()->getLabel(); 31581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 31591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (Label) { 316003509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const CaseStmt* C = dyn_cast<CaseStmt>(Label)) { 3161daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << "\\lcase "; 3162e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner LangOptions LO; // FIXME. 3163e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner C->getLHS()->printPretty(Out, 0, PrintingPolicy(LO)); 31641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 316503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const Stmt* RHS = C->getRHS()) { 3166daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << " .. "; 3167e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner RHS->printPretty(Out, 0, PrintingPolicy(LO)); 3168daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 31691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3170daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << ":"; 3171daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 3172daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek else { 3173daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek assert (isa<DefaultStmt>(Label)); 3174daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << "\\ldefault:"; 3175daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 3176daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 31771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump else 3178daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << "\\l(implicit) default:"; 3179daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 3180daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek else if (isa<IndirectGotoStmt>(T)) { 3181b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek // FIXME 3182b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 3183b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek else { 3184b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek Out << "\\lCondition: "; 3185b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek if (*E.getSrc()->succ_begin() == E.getDst()) 3186b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek Out << "true"; 3187b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek else 31881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Out << "false"; 3189b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 31901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3191b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek Out << "\\l"; 3192b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 31931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 319410f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#if 0 319510f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // FIXME: Replace with a general scheme to determine 319610f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // the name of the check. 31974a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek if (GraphPrintCheckerState->isUndefControlFlow(N)) { 31984a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek Out << "\\|Control-flow based on\\lUndefined value.\\l"; 31993b4f6702860208692f6ef28401e68de4e3ff9af9Ted Kremenek } 320010f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#endif 3201aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek } 3202aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek } 32031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3204b65be70779bdaf75e91731bfd89362bf4118ae31Ted Kremenek const GRState *state = N->getState(); 32058673a68a8ab55a2bd03f92d636a50e6b0bfad2daTed Kremenek Out << "\\|StateID: " << (void*) state 32068673a68a8ab55a2bd03f92d636a50e6b0bfad2daTed Kremenek << " NodeID: " << (void*) N << "\\|"; 3207c179a7fbb294fe3ff6cf5479f6239a10f39628c7Zhongxing Xu state->printDOT(Out, *N->getLocationContext()->getCFG()); 3208803c9edd06e8f936821525d36b1d8cc131e37d44Ted Kremenek Out << "\\l"; 3209aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek return Out.str(); 3210aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek } 3211aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek}; 32121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} // end llvm namespace 3213aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek#endif 3214aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek 3215ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek#ifndef NDEBUG 32167ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenektemplate <typename ITERATOR> 3217031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing XuExplodedNode* GetGraphNode(ITERATOR I) { return *I; } 32187ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenek 3219031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xutemplate <> ExplodedNode* 3220031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing XuGetGraphNode<llvm::DenseMap<ExplodedNode*, Expr*>::iterator> 3221031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu (llvm::DenseMap<ExplodedNode*, Expr*>::iterator I) { 32227ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenek return I->first; 32237ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenek} 3224ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek#endif 3225ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek 3226d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ViewGraph(bool trim) { 32271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump#ifndef NDEBUG 3228ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek if (trim) { 3229031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu std::vector<ExplodedNode*> Src; 3230940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek 3231940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek // Flush any outstanding reports to make sure we cover all the nodes. 3232940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek // This does not cause them to get displayed. 3233940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek for (BugReporter::iterator I=BR.begin(), E=BR.end(); I!=E; ++I) 3234940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek const_cast<BugType*>(*I)->FlushReports(BR); 3235940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek 3236940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek // Iterate through the reports and get their nodes. 3237404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis for (BugReporter::EQClasses_iterator 3238404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis EI = BR.EQClasses_begin(), EE = BR.EQClasses_end(); EI != EE; ++EI) { 3239404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis BugReportEquivClass& EQ = *EI; 3240404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis const BugReport &R = **EQ.begin(); 3241404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis ExplodedNode *N = const_cast<ExplodedNode*>(R.getErrorNode()); 3242404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis if (N) Src.push_back(N); 3243940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek } 32441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 32457ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenek ViewGraph(&Src[0], &Src[0]+Src.size()); 3246ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek } 3247493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek else { 3248493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintCheckerState = this; 3249493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintSourceManager = &getContext().getSourceManager(); 3250ae6814efb6c41bd0c0f6413d25097105284d5be7Ted Kremenek 3251d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis llvm::ViewGraph(*G.roots_begin(), "ExprEngine"); 32521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3253493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintCheckerState = NULL; 3254493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintSourceManager = NULL; 3255493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek } 3256493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek#endif 3257493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek} 3258493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek 3259d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ViewGraph(ExplodedNode** Beg, ExplodedNode** End) { 3260493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek#ifndef NDEBUG 3261493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintCheckerState = this; 3262493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintSourceManager = &getContext().getSourceManager(); 32631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3264031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu std::auto_ptr<ExplodedGraph> TrimmedG(G.Trim(Beg, End).first); 3265493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek 3266cf118d41f7930a18dce97416ef7834a62642f587Ted Kremenek if (!TrimmedG.get()) 32676cb7c1a43b0c8f739d1f54b7fdae5ede86033496Benjamin Kramer llvm::errs() << "warning: Trimmed ExplodedGraph is empty.\n"; 3268cf118d41f7930a18dce97416ef7834a62642f587Ted Kremenek else 3269d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis llvm::ViewGraph(*TrimmedG->roots_begin(), "TrimmedExprEngine"); 32701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 32713b4f6702860208692f6ef28401e68de4e3ff9af9Ted Kremenek GraphPrintCheckerState = NULL; 3272e97ca065c91ff9ca2a2a42eb443eaa553c40441cTed Kremenek GraphPrintSourceManager = NULL; 3273e01c98767dfd7153c3c84637c36659e3bbe16ff7Ted Kremenek#endif 3274ee98546b0d5f3439c4a590b0d7d1545af794a0ecTed Kremenek} 3275