ExprEngine.cpp revision a77c031cb66f75d22672070052cc6e0205289ff8
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::APSInt; 39ab2b8c54bca82866876f91e756788916d3fa20c3Ted Kremenek 406190ec29f0895185bbec95a932429b8832917fecZhongxing Xunamespace { 416190ec29f0895185bbec95a932429b8832917fecZhongxing Xu // Trait class for recording returned expression in the state. 426190ec29f0895185bbec95a932429b8832917fecZhongxing Xu struct ReturnExpr { 436190ec29f0895185bbec95a932429b8832917fecZhongxing Xu static int TagInt; 446190ec29f0895185bbec95a932429b8832917fecZhongxing Xu typedef const Stmt *data_type; 456190ec29f0895185bbec95a932429b8832917fecZhongxing Xu }; 466190ec29f0895185bbec95a932429b8832917fecZhongxing Xu int ReturnExpr::TagInt; 476190ec29f0895185bbec95a932429b8832917fecZhongxing Xu} 486190ec29f0895185bbec95a932429b8832917fecZhongxing Xu 49e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 5032c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenek// Utility functions. 5132c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenek//===----------------------------------------------------------------------===// 5232c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenek 5332c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenekstatic inline Selector GetNullarySelector(const char* name, ASTContext& Ctx) { 5432c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenek IdentifierInfo* II = &Ctx.Idents.get(name); 5532c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenek return Ctx.Selectors.getSelector(0, &II); 5632c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenek} 5732c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenek 5832c4995826c76f282fc05fbbc3241d2dded4fb57Ted Kremenek//===----------------------------------------------------------------------===// 59bdb435ddaafd5069becd543d638112f68825b89dTed Kremenek// Engine construction and deletion. 60bdb435ddaafd5069becd543d638112f68825b89dTed Kremenek//===----------------------------------------------------------------------===// 61bdb435ddaafd5069becd543d638112f68825b89dTed Kremenek 62d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios KyrtzidisExprEngine::ExprEngine(AnalysisManager &mgr, TransferFuncs *tf) 6325e695b2d574d919cc1bbddf3a2efe073d449b1cZhongxing Xu : AMgr(mgr), 64d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis Engine(*this), 65d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis G(Engine.getGraph()), 6650a6d0ce344c02782e0207574005c3b2aaa5077cTed Kremenek Builder(NULL), 67c77a55126fcad66fb086f8e100a494caa2496a2dZhongxing Xu StateMgr(getContext(), mgr.getStoreManagerCreator(), 6832a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek mgr.getConstraintManagerCreator(), G.getAllocator(), 6932a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek *this), 7050a6d0ce344c02782e0207574005c3b2aaa5077cTed Kremenek SymMgr(StateMgr.getSymbolManager()), 71c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder(StateMgr.getSValBuilder()), 720a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek EntryNode(NULL), currentStmt(NULL), 73a5a4166f8cb04490b7b27355874edfb98837cd45Zhongxing Xu NSExceptionII(NULL), NSExceptionInstanceRaiseSelectors(NULL), 74c77a55126fcad66fb086f8e100a494caa2496a2dZhongxing Xu RaiseSel(GetNullarySelector("raise", getContext())), 7532a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek BR(mgr, *this), TF(tf) { 76b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 7732a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek // FIXME: Eventually remove the TF object entirely. 7832a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek TF->RegisterChecks(*this); 7932a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek TF->RegisterPrinters(getStateManager().Printers); 80d767d81290288c030f3be0be1d3e62b9c8df51dcTed Kremenek 81d767d81290288c030f3be0be1d3e62b9c8df51dcTed Kremenek if (mgr.shouldEagerlyTrimExplodedGraph()) { 82d767d81290288c030f3be0be1d3e62b9c8df51dcTed Kremenek // Enable eager node reclaimation when constructing the ExplodedGraph. 83d767d81290288c030f3be0be1d3e62b9c8df51dcTed Kremenek G.enableNodeReclamation(); 84d767d81290288c030f3be0be1d3e62b9c8df51dcTed Kremenek } 85c80135ba857da48173578b9c528fce6777e18168Ted Kremenek} 8650a6d0ce344c02782e0207574005c3b2aaa5077cTed Kremenek 87d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios KyrtzidisExprEngine::~ExprEngine() { 88cf118d41f7930a18dce97416ef7834a62642f587Ted Kremenek BR.FlushReports(); 89e448ab4f9dd162802f5d7cfea60f7830cc61c654Ted Kremenek delete [] NSExceptionInstanceRaiseSelectors; 9050a6d0ce344c02782e0207574005c3b2aaa5077cTed Kremenek} 9150a6d0ce344c02782e0207574005c3b2aaa5077cTed Kremenek 92e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 93e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Utility methods. 94e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 95e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 96d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisconst GRState* ExprEngine::getInitialState(const LocationContext *InitLoc) { 9717fd8632dcda97022a51effc24060eacdad9dbe0Zhongxing Xu const GRState *state = StateMgr.getInitialState(InitLoc); 981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 99cfcd7fd0de701c5ce05e96de1ed2d0bf8c7035d9Ted Kremenek // Preconditions. 100cfcd7fd0de701c5ce05e96de1ed2d0bf8c7035d9Ted Kremenek 10152e5602056e4cade24cbcca57767e94e1d430b03Ted Kremenek // FIXME: It would be nice if we had a more general mechanism to add 10252e5602056e4cade24cbcca57767e94e1d430b03Ted Kremenek // such preconditions. Some day. 1035974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek do { 104b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek const Decl *D = InitLoc->getDecl(); 1055974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 1065974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek // Precondition: the first argument of 'main' is an integer guaranteed 1075974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek // to be > 0. 1085974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek const IdentifierInfo *II = FD->getIdentifier(); 1095974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek if (!II || !(II->getName() == "main" && FD->getNumParams() > 0)) 1105974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek break; 1115974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek 1125974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek const ParmVarDecl *PD = FD->getParamDecl(0); 1135974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek QualType T = PD->getType(); 1145974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek if (!T->isIntegerType()) 1155974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek break; 116b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1175974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek const MemRegion *R = state->getRegion(PD, InitLoc); 1185974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek if (!R) 1195974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek break; 120b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1211397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getSVal(loc::MemRegionVal(R)); 1229c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek SVal Constraint_untested = evalBinOp(state, BO_GT, V, 123c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.makeZeroVal(T), 1245974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek getContext().IntTy); 1255974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek 1265974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek DefinedOrUnknownSVal *Constraint = 1275974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek dyn_cast<DefinedOrUnknownSVal>(&Constraint_untested); 128b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1295974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek if (!Constraint) 1305974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek break; 131b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 13228f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *newState = state->assume(*Constraint, true)) 1335974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek state = newState; 134b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1355974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek break; 13652e5602056e4cade24cbcca57767e94e1d430b03Ted Kremenek } 1375974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek 138b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) { 1395974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek // Precondition: 'self' is always non-null upon entry to an Objective-C 1405974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek // method. 1415974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek const ImplicitParamDecl *SelfD = MD->getSelfDecl(); 1425974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek const MemRegion *R = state->getRegion(SelfD, InitLoc); 1431397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getSVal(loc::MemRegionVal(R)); 144b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1455974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek if (const Loc *LV = dyn_cast<Loc>(&V)) { 1465974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek // Assume that the pointer value in 'self' is non-null. 14728f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek state = state->assume(*LV, true); 1485974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek assert(state && "'self' cannot be null"); 1495974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek } 150cfcd7fd0de701c5ce05e96de1ed2d0bf8c7035d9Ted Kremenek } 1515974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek } while (0); 152b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 15352e5602056e4cade24cbcca57767e94e1d430b03Ted Kremenek return state; 154e070a1df66aab6d4168fb28f7559fdf996df3567Ted Kremenek} 155e070a1df66aab6d4168fb28f7559fdf996df3567Ted Kremenek 156e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenekbool 157e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed KremenekExprEngine::doesInvalidateGlobals(const CallOrObjCMessage &callOrMessage) const 158e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek{ 159e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek if (callOrMessage.isFunctionCall() && !callOrMessage.isCXXCall()) { 160e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek SVal calleeV = callOrMessage.getFunctionCallee(); 161e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek if (const FunctionTextRegion *codeR = 1625f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner dyn_cast_or_null<FunctionTextRegion>(calleeV.getAsRegion())) { 163e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek 164e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek const FunctionDecl *fd = codeR->getDecl(); 165e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek if (const IdentifierInfo *ii = fd->getIdentifier()) { 1665f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef fname = ii->getName(); 167e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek if (fname == "strlen") 168e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek return false; 169e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek } 170e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek } 171e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek } 172e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek 173e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek // The conservative answer: invalidates globals. 174e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek return true; 175e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek} 176e5cfd52a3a5d4bb46f77323fa8fa0b973fcde7bcTed Kremenek 177e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 178e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Top-level transfer function logic (Dispatcher). 179e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 180e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 1819c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek/// evalAssume - Called by ConstraintManager. Used to call checker-specific 18232a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek/// logic for handling assumptions on symbolic values. 183e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekconst GRState *ExprEngine::processAssume(const GRState *state, SVal cond, 184b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek bool assumption) { 185312dbec867f6b8d6b86fd562c53352cd4db27468Argyrios Kyrtzidis state = getCheckerManager().runCheckersForEvalAssume(state, cond, assumption); 186312dbec867f6b8d6b86fd562c53352cd4db27468Argyrios Kyrtzidis 18772905cfa81cfd126f322c4173f56d332aac5539eJordy Rose // If the state is infeasible at this point, bail out. 18832a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek if (!state) 18932a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek return NULL; 190b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1919c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek return TF->evalAssume(state, cond, assumption); 19232a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek} 19332a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek 194e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekbool ExprEngine::wantsRegionChangeUpdate(const GRState* state) { 195183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis return getCheckerManager().wantsRegionChangeUpdate(state); 196c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose} 197c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose 198c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Roseconst GRState * 199e36de1fe51c39d9161915dd3dbef880954af6476Ted KremenekExprEngine::processRegionChanges(const GRState *state, 20035bdbf40624beba3fc00cb72ab444659939c1a6bTed Kremenek const StoreManager::InvalidatedSymbols *invalidated, 20135bdbf40624beba3fc00cb72ab444659939c1a6bTed Kremenek const MemRegion * const *Begin, 20235bdbf40624beba3fc00cb72ab444659939c1a6bTed Kremenek const MemRegion * const *End) { 20335bdbf40624beba3fc00cb72ab444659939c1a6bTed Kremenek return getCheckerManager().runCheckersForRegionChanges(state, invalidated, 20435bdbf40624beba3fc00cb72ab444659939c1a6bTed Kremenek Begin, End); 205c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose} 206c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose 207e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processEndWorklist(bool hasWorkRemaining) { 20830726c6baee1417307236e854f1474fdb3cedb98Argyrios Kyrtzidis getCheckerManager().runCheckersForEndAnalysis(G, BR, *this); 209ccc263b44c62ce3a02f797a3ddb3d6017cf0e5e4Ted Kremenek} 210ccc263b44c62ce3a02f797a3ddb3d6017cf0e5e4Ted Kremenek 211e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processCFGElement(const CFGElement E, 212d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder& builder) { 2139c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu switch (E.getKind()) { 2143c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::Invalid: 2153c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek llvm_unreachable("Unexpected CFGElement kind."); 2163c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::Statement: 2173c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek ProcessStmt(E.getAs<CFGStmt>()->getStmt(), builder); 2183c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek return; 2193c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::Initializer: 2203c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek ProcessInitializer(E.getAs<CFGInitializer>()->getInitializer(), builder); 2213c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek return; 2223c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::AutomaticObjectDtor: 2233c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::BaseDtor: 2243c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::MemberDtor: 2253c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::TemporaryDtor: 2263c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek ProcessImplicitDtor(*E.getAs<CFGImplicitDtor>(), builder); 2273c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek return; 2289c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu } 2299c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu} 2309c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu 231d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessStmt(const CFGStmt S, StmtNodeBuilder& builder) { 232d767d81290288c030f3be0be1d3e62b9c8df51dcTed Kremenek // Reclaim any unnecessary nodes in the ExplodedGraph. 233d767d81290288c030f3be0be1d3e62b9c8df51dcTed Kremenek G.reclaimRecentlyAllocatedNodes(); 234e3115e257163321ecde429aeae75f1702f099d4cTed Kremenek // Recycle any unused states in the GRStateManager. 235e3115e257163321ecde429aeae75f1702f099d4cTed Kremenek StateMgr.recycleUnusedStates(); 236e3115e257163321ecde429aeae75f1702f099d4cTed Kremenek 2370a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek currentStmt = S.getStmt(); 2380bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek PrettyStackTraceLoc CrashInfo(getContext().getSourceManager(), 2390a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek currentStmt->getLocStart(), 2400bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek "Error evaluating statement"); 2411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 242e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek Builder = &builder; 243b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek EntryNode = builder.getPredecessor(); 2441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Create the cleaned state. 246bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose const LocationContext *LC = EntryNode->getLocationContext(); 2470a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek SymbolReaper SymReaper(LC, currentStmt, SymMgr); 248c179a7fbb294fe3ff6cf5479f6239a10f39628c7Zhongxing Xu 249bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose if (AMgr.shouldPurgeDead()) { 250bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose const GRState *St = EntryNode->getState(); 251183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis getCheckerManager().runCheckersForLiveSymbols(St, SymReaper); 252183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis 253bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose const StackFrameContext *SFC = LC->getCurrentStackFrame(); 254db0594bfc013131f88429add4eb653c285fa94fbTed Kremenek CleanedState = StateMgr.removeDeadBindings(St, SFC, SymReaper); 255bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose } else { 256bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose CleanedState = EntryNode->getState(); 257bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose } 258241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek 25977d7ef8d8a80ccb2ab3d25c80810571e3ab14ee4Ted Kremenek // Process any special transfer function for dead symbols. 260031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 262241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek if (!SymReaper.hasDeadSymbols()) 263846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek Tmp.Add(EntryNode); 26477d7ef8d8a80ccb2ab3d25c80810571e3ab14ee4Ted Kremenek else { 26577d7ef8d8a80ccb2ab3d25c80810571e3ab14ee4Ted Kremenek SaveAndRestore<bool> OldSink(Builder->BuildSinks); 266b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek SaveOr OldHasGen(Builder->hasGeneratedNode); 267846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek 268331b0ac44b9eb0ffcba66b4f3f3f9adb27c2434fTed Kremenek SaveAndRestore<bool> OldPurgeDeadSymbols(Builder->PurgingDeadSymbols); 269331b0ac44b9eb0ffcba66b4f3f3f9adb27c2434fTed Kremenek Builder->PurgingDeadSymbols = true; 2701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2719400613b54bf56c317786d778f58f45f1080d619Zhongxing Xu // FIXME: This should soon be removed. 2729400613b54bf56c317786d778f58f45f1080d619Zhongxing Xu ExplodedNodeSet Tmp2; 2739c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek getTF().evalDeadSymbols(Tmp2, *this, *Builder, EntryNode, 274241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek CleanedState, SymReaper); 275846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek 276eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForDeadSymbols(Tmp, Tmp2, 277183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis SymReaper, currentStmt, *this); 278183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis 279b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek if (!Builder->BuildSinks && !Builder->hasGeneratedNode) 280846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek Tmp.Add(EntryNode); 28177d7ef8d8a80ccb2ab3d25c80810571e3ab14ee4Ted Kremenek } 2821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 283846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek bool HasAutoGenerated = false; 284846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek 285031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 286031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Dst; 2871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Set the cleaned state. 289846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek Builder->SetCleanedState(*I == EntryNode ? CleanedState : GetState(*I)); 2901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Visit the statement. 2920a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek Visit(currentStmt, *I, Dst); 293846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek 294846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek // Do we need to auto-generate a node? We only need to do this to generate 295d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis // a node with a "cleaned" state; CoreEngine will actually handle 2961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // auto-transitions for other cases. 297846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek if (Dst.size() == 1 && *Dst.begin() == EntryNode 298b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek && !Builder->hasGeneratedNode && !HasAutoGenerated) { 299846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek HasAutoGenerated = true; 3000a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek builder.generateNode(currentStmt, GetState(EntryNode), *I); 301846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek } 30277d7ef8d8a80ccb2ab3d25c80810571e3ab14ee4Ted Kremenek } 3031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 304e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // NULL out these variables to cleanup. 305846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek CleanedState = NULL; 306846d4e923bf11bcdc2816758aafa331795f29230Ted Kremenek EntryNode = NULL; 307df7533b5e523a3def04b5c33b56361a94dd97d35Ted Kremenek 3080a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek currentStmt = 0; 3091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 310e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek Builder = NULL; 311e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek} 312e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 313d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessInitializer(const CFGInitializer Init, 314d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 3150a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek // We don't set EntryNode and currentStmt. And we don't clean up state. 316cbb67480094b3bcb5b715acd827cbad55e2a204cSean Hunt const CXXCtorInitializer *BMI = Init.getInitializer(); 3179dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 318d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu ExplodedNode *pred = builder.getPredecessor(); 319d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu 320d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu const StackFrameContext *stackFrame = cast<StackFrameContext>(pred->getLocationContext()); 321d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu const CXXConstructorDecl *decl = cast<CXXConstructorDecl>(stackFrame->getDecl()); 322d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu const CXXThisRegion *thisReg = getCXXThisRegion(decl, stackFrame); 323d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu 324d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu SVal thisVal = pred->getState()->getSVal(thisReg); 3259dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 32600eb3f9c5b33e3d99aee1f8b75dd9c9678fdd66bFrancois Pichet if (BMI->isAnyMemberInitializer()) { 3279dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu ExplodedNodeSet Dst; 3289dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 3299dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu // Evaluate the initializer. 330d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu Visit(BMI->getInit(), pred, Dst); 3319dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 3329dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu for (ExplodedNodeSet::iterator I = Dst.begin(), E = Dst.end(); I != E; ++I){ 3339dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu ExplodedNode *Pred = *I; 3349dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu const GRState *state = Pred->getState(); 3359dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 33600eb3f9c5b33e3d99aee1f8b75dd9c9678fdd66bFrancois Pichet const FieldDecl *FD = BMI->getAnyMember(); 3379dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 338d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu SVal FieldLoc = state->getLValue(FD, thisVal); 3399dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu SVal InitVal = state->getSVal(BMI->getInit()); 3409dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu state = state->bindLoc(FieldLoc, InitVal); 3419dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 3429dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu // Use a custom node building process. 343d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu PostInitializer PP(BMI, stackFrame); 3449dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu // Builder automatically add the generated node to the deferred set, 3459dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu // which are processed in the builder's dtor. 3469dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu builder.generateNode(PP, state, Pred); 3479dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu } 348d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu return; 3499dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu } 350d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu 351d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu assert(BMI->isBaseInitializer()); 352d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu 353d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu // Get the base class declaration. 354d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu const CXXConstructExpr *ctorExpr = cast<CXXConstructExpr>(BMI->getInit()); 355d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu 356d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu // Create the base object region. 357d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu SVal baseVal = 358d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu getStoreManager().evalDerivedToBase(thisVal, ctorExpr->getType()); 359d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu const MemRegion *baseReg = baseVal.getAsRegion(); 360d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu assert(baseReg); 361d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu Builder = &builder; 362d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu ExplodedNodeSet dst; 363d074441e027471a914cbb909a7aad1d43224950fZhongxing Xu VisitCXXConstructExpr(ctorExpr, baseReg, pred, dst); 3649c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu} 3659c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu 366d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessImplicitDtor(const CFGImplicitDtor D, 367d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 368b13453bd8a91f331d0910ca95ad52aa41b52f648Zhongxing Xu Builder = &builder; 369b13453bd8a91f331d0910ca95ad52aa41b52f648Zhongxing Xu 3703c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek switch (D.getKind()) { 3714ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu case CFGElement::AutomaticObjectDtor: 3724ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu ProcessAutomaticObjDtor(cast<CFGAutomaticObjDtor>(D), builder); 3734ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu break; 3744ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu case CFGElement::BaseDtor: 3754ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu ProcessBaseDtor(cast<CFGBaseDtor>(D), builder); 3764ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu break; 3774ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu case CFGElement::MemberDtor: 3784ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu ProcessMemberDtor(cast<CFGMemberDtor>(D), builder); 3794ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu break; 3804ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu case CFGElement::TemporaryDtor: 3814ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu ProcessTemporaryDtor(cast<CFGTemporaryDtor>(D), builder); 3824ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu break; 3834ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu default: 3844ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu llvm_unreachable("Unexpected dtor kind."); 3854ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu } 3864ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu} 3874ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu 388d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessAutomaticObjDtor(const CFGAutomaticObjDtor dtor, 389d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 390b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek ExplodedNode *pred = builder.getPredecessor(); 3912210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu const GRState *state = pred->getState(); 3922210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu const VarDecl *varDecl = dtor.getVarDecl(); 3932210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu 3942210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu QualType varType = varDecl->getType(); 3952210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu 3962210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu if (const ReferenceType *refType = varType->getAs<ReferenceType>()) 3972210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu varType = refType->getPointeeType(); 3982210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu 3992210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu const CXXRecordDecl *recordDecl = varType->getAsCXXRecordDecl(); 4002210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu assert(recordDecl && "get CXXRecordDecl fail"); 4012210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu const CXXDestructorDecl *dtorDecl = recordDecl->getDestructor(); 402b13453bd8a91f331d0910ca95ad52aa41b52f648Zhongxing Xu 4032210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu Loc dest = state->getLValue(varDecl, pred->getLocationContext()); 404b13453bd8a91f331d0910ca95ad52aa41b52f648Zhongxing Xu 4052210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu ExplodedNodeSet dstSet; 4062210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu VisitCXXDestructor(dtorDecl, cast<loc::MemRegionVal>(dest).getRegion(), 4072210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu dtor.getTriggerStmt(), pred, dstSet); 4084ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu} 4094ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu 410d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessBaseDtor(const CFGBaseDtor D, 411d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 4124ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu} 4134ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu 414d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessMemberDtor(const CFGMemberDtor D, 415d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 4164ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu} 4174ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu 418d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessTemporaryDtor(const CFGTemporaryDtor D, 419d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilder &builder) { 4209c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu} 4219c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu 422d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::Visit(const Stmt* S, ExplodedNode* Pred, 42303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ExplodedNodeSet& Dst) { 4240bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek PrettyStackTraceLoc CrashInfo(getContext().getSourceManager(), 4250bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek S->getLocStart(), 4260bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek "Error evaluating statement"); 4270bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek 428f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall // Expressions to ignore. 429f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall if (const Expr *Ex = dyn_cast<Expr>(S)) 430892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek S = Ex->IgnoreParens(); 431f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall 432e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // FIXME: add metadata to the CFG so that we can disable 433e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // this check when we KNOW that there is no block-level subexpression. 434e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // The motivation is that this check requires a hashtable lookup. 4351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4360a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek if (S != currentStmt && Pred->getLocationContext()->getCFG()->isBlkExpr(S)) { 437e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek Dst.Add(Pred); 438e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek return; 439e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 4401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 441e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek switch (S->getStmtClass()) { 442f85e193739c953358c865005855253af4f68a497John McCall // C++ and ARC stuff we don't support yet. 443f85e193739c953358c865005855253af4f68a497John McCall case Expr::ObjCIndirectCopyRestoreExprClass: 4441b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXBindTemporaryExprClass: 4451b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXCatchStmtClass: 4461b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXDependentScopeMemberExprClass: 447ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith case Stmt::CXXForRangeStmtClass: 4481b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXPseudoDestructorExprClass: 449c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek case Stmt::CXXTemporaryObjectExprClass: 4501b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXThrowExprClass: 4511b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXTryStmtClass: 4521b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXTypeidExprClass: 4539be88403e965cc49af76c9d33d818781d44b333eFrancois Pichet case Stmt::CXXUuidofExprClass: 454c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek case Stmt::CXXUnresolvedConstructExprClass: 455ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor case Stmt::CXXScalarValueInitExprClass: 4561b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::DependentScopeDeclRefExprClass: 4571b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::UnaryTypeTraitExprClass: 4586ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet case Stmt::BinaryTypeTraitExprClass: 45921ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley case Stmt::ArrayTypeTraitExprClass: 460552622067dc45013d240f73952fece703f5e63bdJohn Wiegley case Stmt::ExpressionTraitExprClass: 4611b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::UnresolvedLookupExprClass: 462c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek case Stmt::UnresolvedMemberExprClass: 4636b219d082434394c1ac401390ec1d1967727815aSebastian Redl case Stmt::CXXNoexceptExprClass: 464be230c36e32142cbdcdbe9c97511d097beeecbabDouglas Gregor case Stmt::PackExpansionExprClass: 465c7793c73ba8a343de3f2552d984851985a46f159Douglas Gregor case Stmt::SubstNonTypeTemplateParmPackExprClass: 46628bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley case Stmt::SEHTryStmtClass: 46728bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley case Stmt::SEHExceptStmtClass: 46828bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley case Stmt::SEHFinallyStmtClass: 4691b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek { 470c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek SaveAndRestore<bool> OldSink(Builder->BuildSinks); 471c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek Builder->BuildSinks = true; 472422ab7a49a9a4252dbc6350e49d7a5708337b9c7Ted Kremenek const ExplodedNode *node = MakeNode(Dst, S, Pred, GetState(Pred)); 473422ab7a49a9a4252dbc6350e49d7a5708337b9c7Ted Kremenek Engine.addAbortedBlock(node, Builder->getBlock()); 474c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek break; 475c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek } 4765fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek 4775fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek // We don't handle default arguments either yet, but we can fake it 4785fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek // for now by just skipping them. 47991a5755ad73c5dc1dfb167e448fdd74e75a6df56John McCall case Stmt::SubstNonTypeTemplateParmExprClass: 4805fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek case Stmt::CXXDefaultArgExprClass: { 4815fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek Dst.Add(Pred); 4825fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek break; 4835fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek } 4845fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek 485f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall case Stmt::ParenExprClass: 486f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall llvm_unreachable("ParenExprs already handled."); 487f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne case Stmt::GenericSelectionExprClass: 488f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne llvm_unreachable("GenericSelectionExprs already handled."); 4891b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // Cases that should never be evaluated simply because they shouldn't 4901b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // appear in the CFG. 4911b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::BreakStmtClass: 4921b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CaseStmtClass: 4931b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CompoundStmtClass: 4941b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ContinueStmtClass: 4951b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::DefaultStmtClass: 4961b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::DoStmtClass: 497d40066b0fb883839a9100e5455e33190b9b8abacTed Kremenek case Stmt::ForStmtClass: 4981b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::GotoStmtClass: 499d40066b0fb883839a9100e5455e33190b9b8abacTed Kremenek case Stmt::IfStmtClass: 5001b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::IndirectGotoStmtClass: 5011b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::LabelStmtClass: 5021b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::NoStmtClass: 5031b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::NullStmtClass: 504d40066b0fb883839a9100e5455e33190b9b8abacTed Kremenek case Stmt::SwitchStmtClass: 505d40066b0fb883839a9100e5455e33190b9b8abacTed Kremenek case Stmt::WhileStmtClass: 5061b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek llvm_unreachable("Stmt should not be in analyzer evaluation loop"); 5071b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek break; 5081b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek 5098ad9cbc518a603176462f1fa1efe389023590082Ted Kremenek case Stmt::GNUNullExprClass: { 5108f08426e6f54ed20b959018f24dbea106a00b4adJordy Rose // GNU __null is a pointer-width integer, not an actual pointer. 5118f08426e6f54ed20b959018f24dbea106a00b4adJordy Rose const GRState *state = GetState(Pred); 5128f08426e6f54ed20b959018f24dbea106a00b4adJordy Rose state = state->BindExpr(S, svalBuilder.makeIntValWithPtrWidth(0, false)); 5138f08426e6f54ed20b959018f24dbea106a00b4adJordy Rose MakeNode(Dst, S, Pred, state); 5148ad9cbc518a603176462f1fa1efe389023590082Ted Kremenek break; 5158ad9cbc518a603176462f1fa1efe389023590082Ted Kremenek } 5168ad9cbc518a603176462f1fa1efe389023590082Ted Kremenek 5174beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek case Stmt::ObjCAtSynchronizedStmtClass: 5184beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek VisitObjCAtSynchronizedStmt(cast<ObjCAtSynchronizedStmt>(S), Pred, Dst); 5194beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek break; 5204beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 52114429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis case Stmt::ObjCPropertyRefExprClass: 52214429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis VisitObjCPropertyRefExpr(cast<ObjCPropertyRefExpr>(S), Pred, Dst); 52314429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis break; 52414429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 525f85e193739c953358c865005855253af4f68a497John McCall case Stmt::ImplicitValueInitExprClass: { 526f85e193739c953358c865005855253af4f68a497John McCall const GRState *state = GetState(Pred); 527f85e193739c953358c865005855253af4f68a497John McCall QualType ty = cast<ImplicitValueInitExpr>(S)->getType(); 528f85e193739c953358c865005855253af4f68a497John McCall SVal val = svalBuilder.makeZeroVal(ty); 529f85e193739c953358c865005855253af4f68a497John McCall MakeNode(Dst, S, Pred, state->BindExpr(S, val)); 530f85e193739c953358c865005855253af4f68a497John McCall break; 531f85e193739c953358c865005855253af4f68a497John McCall } 532f85e193739c953358c865005855253af4f68a497John McCall 533f85e193739c953358c865005855253af4f68a497John McCall case Stmt::ExprWithCleanupsClass: { 534f85e193739c953358c865005855253af4f68a497John McCall Visit(cast<ExprWithCleanups>(S)->getSubExpr(), Pred, Dst); 535f85e193739c953358c865005855253af4f68a497John McCall break; 536f85e193739c953358c865005855253af4f68a497John McCall } 537f85e193739c953358c865005855253af4f68a497John McCall 5381b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // Cases not handled yet; but will handle some day. 5391b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::DesignatedInitExprClass: 5401b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ExtVectorElementExprClass: 5411b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ImaginaryLiteralClass: 5421b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCAtCatchStmtClass: 5431b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCAtFinallyStmtClass: 5441b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCAtTryStmtClass: 545f85e193739c953358c865005855253af4f68a497John McCall case Stmt::ObjCAutoreleasePoolStmtClass: 5461b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCEncodeExprClass: 5471b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCIsaExprClass: 5481b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCProtocolExprClass: 5491b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCSelectorExprClass: 5501b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCStringLiteralClass: 5511b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ParenListExprClass: 5521b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::PredefinedExprClass: 5531b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ShuffleVectorExprClass: 5541b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::VAArgExprClass: 555e08ce650a2b02410eddd1f60a4aa6b3d4be71e73Peter Collingbourne case Stmt::CUDAKernelCallExprClass: 55656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall case Stmt::OpaqueValueExprClass: 55761eee0ca33b29e102f11bab77c8b74cc00e2392bTanya Lattner case Stmt::AsTypeExprClass: 5581b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // Fall through. 5591b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek 5601b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // Cases we intentionally don't evaluate, since they don't need 5611b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // to be explicitly evaluated. 562bc9ad74a13e83303a3a5251f8bacbbca17341c17Zhongxing Xu case Stmt::AddrLabelExprClass: 563bc9ad74a13e83303a3a5251f8bacbbca17341c17Zhongxing Xu case Stmt::IntegerLiteralClass: 564bc9ad74a13e83303a3a5251f8bacbbca17341c17Zhongxing Xu case Stmt::CharacterLiteralClass: 565477323d58a0de352c6a61e08b5a83127c4adc904Zhongxing Xu case Stmt::CXXBoolLiteralExprClass: 566bc9ad74a13e83303a3a5251f8bacbbca17341c17Zhongxing Xu case Stmt::FloatingLiteralClass: 567f901a7de97f46ba2b1ff153f9fb83d00dc37cfcfDouglas Gregor case Stmt::SizeOfPackExprClass: 568e970c60dadaf22019743724bac879dbefbc4f5e3Ted Kremenek case Stmt::CXXNullPtrLiteralExprClass: 569e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek Dst.Add(Pred); // No-op. Simply propagate the current state unchanged. 570e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 5711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 572540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek case Stmt::ArraySubscriptExprClass: 573892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitLvalArraySubscriptExpr(cast<ArraySubscriptExpr>(S), Pred, Dst); 574540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek break; 5751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 576e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::AsmStmtClass: 577e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek VisitAsmStmt(cast<AsmStmt>(S), Pred, Dst); 578e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 579b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 580892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek case Stmt::BlockDeclRefExprClass: { 581892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const BlockDeclRefExpr *BE = cast<BlockDeclRefExpr>(S); 582892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitCommonDeclRefExpr(BE, BE->getDecl(), Pred, Dst); 58367d1287035767f4f6c8ca0c2bb755990012a44caTed Kremenek break; 584892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 5851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 586c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek case Stmt::BlockExprClass: 587c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek VisitBlockExpr(cast<BlockExpr>(S), Pred, Dst); 588c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek break; 589c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek 590e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::BinaryOperatorClass: { 59103509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const BinaryOperator* B = cast<BinaryOperator>(S); 592e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek if (B->isLogicalOp()) { 593e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek VisitLogicalExpr(B, Pred, Dst); 594e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 595e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 5962de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall else if (B->getOpcode() == BO_Comma) { 597a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(Pred); 5981397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek MakeNode(Dst, B, Pred, state->BindExpr(B, state->getSVal(B->getRHS()))); 599e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 600e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 60106fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 602b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek if (AMgr.shouldEagerlyAssume() && 603bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu (B->isRelationalOp() || B->isEqualityOp())) { 604031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 605892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitBinaryOperator(cast<BinaryOperator>(S), Pred, Tmp); 6069c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalEagerlyAssume(Dst, Tmp, cast<Expr>(S)); 60748af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 60848af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek else 609892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitBinaryOperator(cast<BinaryOperator>(S), Pred, Dst); 61048af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek 611e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 612e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 61306fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 614b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CallExprClass: 615b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CXXOperatorCallExprClass: 616b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CXXMemberCallExprClass: { 617b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek VisitCallExpr(cast<CallExpr>(S), Pred, Dst); 61806fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek break; 619e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 62006fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 6217ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu case Stmt::CXXConstructExprClass: { 6227ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu const CXXConstructExpr *C = cast<CXXConstructExpr>(S); 6237ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu // For block-level CXXConstructExpr, we don't have a destination region. 6247ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu // Let VisitCXXConstructExpr() create one. 625892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitCXXConstructExpr(C, 0, Pred, Dst); 6267ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu break; 6277ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu } 6287ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu 629856c6bcaea56e05255e9f3997ddd56b5c18a14f0Zhongxing Xu case Stmt::CXXNewExprClass: { 63003509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const CXXNewExpr *NE = cast<CXXNewExpr>(S); 631856c6bcaea56e05255e9f3997ddd56b5c18a14f0Zhongxing Xu VisitCXXNewExpr(NE, Pred, Dst); 632856c6bcaea56e05255e9f3997ddd56b5c18a14f0Zhongxing Xu break; 633856c6bcaea56e05255e9f3997ddd56b5c18a14f0Zhongxing Xu } 634856c6bcaea56e05255e9f3997ddd56b5c18a14f0Zhongxing Xu 6356b8513829895e56a7b97e787ea74520bc626512eZhongxing Xu case Stmt::CXXDeleteExprClass: { 63603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const CXXDeleteExpr *CDE = cast<CXXDeleteExpr>(S); 6376b8513829895e56a7b97e787ea74520bc626512eZhongxing Xu VisitCXXDeleteExpr(CDE, Pred, Dst); 6386b8513829895e56a7b97e787ea74520bc626512eZhongxing Xu break; 6396b8513829895e56a7b97e787ea74520bc626512eZhongxing Xu } 640e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // FIXME: ChooseExpr is really a constant. We need to fix 641e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // the CFG do not model them as explicit control-flow. 6421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 643e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::ChooseExprClass: { // __builtin_choose_expr 64403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const ChooseExpr* C = cast<ChooseExpr>(S); 645e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek VisitGuardedExpr(C, C->getLHS(), C->getRHS(), Pred, Dst); 646e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 647e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 6481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 649e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::CompoundAssignOperatorClass: 650892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitBinaryOperator(cast<BinaryOperator>(S), Pred, Dst); 651e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 652f22679e3e5d5f5754931952e58112b4c863a4137Zhongxing Xu 653f22679e3e5d5f5754931952e58112b4c863a4137Zhongxing Xu case Stmt::CompoundLiteralExprClass: 654892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitCompoundLiteralExpr(cast<CompoundLiteralExpr>(S), Pred, Dst); 655f22679e3e5d5f5754931952e58112b4c863a4137Zhongxing Xu break; 6561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 65756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall case Stmt::BinaryConditionalOperatorClass: 658e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::ConditionalOperatorClass: { // '?' operator 65956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall const AbstractConditionalOperator *C 66056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall = cast<AbstractConditionalOperator>(S); 66156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall VisitGuardedExpr(C, C->getTrueExpr(), C->getFalseExpr(), Pred, Dst); 662e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 663e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 6641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 665bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu case Stmt::CXXThisExprClass: 666bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu VisitCXXThisExpr(cast<CXXThisExpr>(S), Pred, Dst); 667bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu break; 668bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu 669892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek case Stmt::DeclRefExprClass: { 670892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const DeclRefExpr *DE = cast<DeclRefExpr>(S); 671892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitCommonDeclRefExpr(DE, DE->getDecl(), Pred, Dst); 672e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 673892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 6741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 675e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::DeclStmtClass: 676e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek VisitDeclStmt(cast<DeclStmt>(S), Pred, Dst); 677e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 6781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6790835a3cdeefe714b4959d31127ea155e56393125Argyrios Kyrtzidis case Stmt::ImplicitCastExprClass: 6800d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CStyleCastExprClass: 6810d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CXXStaticCastExprClass: 6820d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CXXDynamicCastExprClass: 6830d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CXXReinterpretCastExprClass: 6840d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CXXConstCastExprClass: 685f85e193739c953358c865005855253af4f68a497John McCall case Stmt::CXXFunctionalCastExprClass: 686f85e193739c953358c865005855253af4f68a497John McCall case Stmt::ObjCBridgedCastExprClass: { 68703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const CastExpr* C = cast<CastExpr>(S); 688f85e193739c953358c865005855253af4f68a497John McCall // Handle the previsit checks. 689f85e193739c953358c865005855253af4f68a497John McCall ExplodedNodeSet dstPrevisit; 690f85e193739c953358c865005855253af4f68a497John McCall getCheckerManager().runCheckersForPreStmt(dstPrevisit, Pred, C, *this); 691f85e193739c953358c865005855253af4f68a497John McCall 692f85e193739c953358c865005855253af4f68a497John McCall // Handle the expression itself. 693f85e193739c953358c865005855253af4f68a497John McCall ExplodedNodeSet dstExpr; 694f85e193739c953358c865005855253af4f68a497John McCall for (ExplodedNodeSet::iterator i = dstPrevisit.begin(), 695f85e193739c953358c865005855253af4f68a497John McCall e = dstPrevisit.end(); i != e ; ++i) { 696f85e193739c953358c865005855253af4f68a497John McCall VisitCast(C, C->getSubExpr(), *i, dstExpr); 697f85e193739c953358c865005855253af4f68a497John McCall } 698f85e193739c953358c865005855253af4f68a497John McCall 699f85e193739c953358c865005855253af4f68a497John McCall // Handle the postvisit checks. 700f85e193739c953358c865005855253af4f68a497John McCall getCheckerManager().runCheckersForPostStmt(Dst, dstExpr, C, *this); 701e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 702e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 703b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 70403e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor case Expr::MaterializeTemporaryExprClass: { 70503e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor const MaterializeTemporaryExpr *Materialize 70603e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor = cast<MaterializeTemporaryExpr>(S); 70703e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor if (!Materialize->getType()->isRecordType()) 70803e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor CreateCXXTemporaryObject(Materialize->GetTemporaryExpr(), Pred, Dst); 70903e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor else 71003e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor Visit(Materialize->GetTemporaryExpr(), Pred, Dst); 71103e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor break; 71203e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor } 71303e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor 714c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu case Stmt::InitListExprClass: 715c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu VisitInitListExpr(cast<InitListExpr>(S), Pred, Dst); 716c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu break; 7171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 71897ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek case Stmt::MemberExprClass: 719892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitMemberExpr(cast<MemberExpr>(S), Pred, Dst); 720469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek break; 72197ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek case Stmt::ObjCIvarRefExprClass: 722892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitLvalObjCIvarRefExpr(cast<ObjCIvarRefExpr>(S), Pred, Dst); 72397ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek break; 724af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek 725af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek case Stmt::ObjCForCollectionStmtClass: 726af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek VisitObjCForCollectionStmt(cast<ObjCForCollectionStmt>(S), Pred, Dst); 727af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek break; 7281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 72938ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek case Stmt::ObjCMessageExprClass: 730892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitObjCMessageExpr(cast<ObjCMessageExpr>(S), Pred, Dst); 731e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 7321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 733bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek case Stmt::ObjCAtThrowStmtClass: { 734bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek // FIXME: This is not complete. We basically treat @throw as 735bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek // an abort. 736bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek SaveAndRestore<bool> OldSink(Builder->BuildSinks); 737bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek Builder->BuildSinks = true; 738bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek MakeNode(Dst, S, Pred, GetState(Pred)); 739bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek break; 740bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek } 7411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7421b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek case Stmt::ReturnStmtClass: 7431b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek VisitReturnStmt(cast<ReturnStmt>(S), Pred, Dst); 7441b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek break; 7451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7468ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case Stmt::OffsetOfExprClass: 7478ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor VisitOffsetOfExpr(cast<OffsetOfExpr>(S), Pred, Dst); 7488ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 7498ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 750f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne case Stmt::UnaryExprOrTypeTraitExprClass: 751f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne VisitUnaryExprOrTypeTraitExpr(cast<UnaryExprOrTypeTraitExpr>(S), 752f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne Pred, Dst); 753e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 7541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 755e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::StmtExprClass: { 75603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const StmtExpr* SE = cast<StmtExpr>(S); 757a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek 758a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek if (SE->getSubStmt()->body_empty()) { 759a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek // Empty statement expression. 760a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek assert(SE->getType() == getContext().VoidTy 761a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek && "Empty statement expression must have void type."); 762a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek Dst.Add(Pred); 763a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek break; 764a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek } 7651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 766a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek if (Expr* LastExpr = dyn_cast<Expr>(*SE->getSubStmt()->body_rbegin())) { 767a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek const GRState* state = GetState(Pred); 7681397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek MakeNode(Dst, SE, Pred, state->BindExpr(SE, state->getSVal(LastExpr))); 769a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek } 770e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek else 771e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek Dst.Add(Pred); 7721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 773e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 774e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 7756987c7b74146b9658b1925c5981f8b0cd0672b55Zhongxing Xu 776892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek case Stmt::StringLiteralClass: { 777892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const GRState* state = GetState(Pred); 778892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal V = state->getLValue(cast<StringLiteral>(S)); 779892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek MakeNode(Dst, S, Pred, state->BindExpr(S, V)); 780892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek return; 781892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 782b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 78372374594c5d9ade02451bc85cf9dfa5b0ea106e7Ted Kremenek case Stmt::UnaryOperatorClass: { 78403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const UnaryOperator *U = cast<UnaryOperator>(S); 7852de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (AMgr.shouldEagerlyAssume()&&(U->getOpcode() == UO_LNot)) { 786031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 787892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitUnaryOperator(U, Pred, Tmp); 7889c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalEagerlyAssume(Dst, Tmp, U); 78972374594c5d9ade02451bc85cf9dfa5b0ea106e7Ted Kremenek } 79072374594c5d9ade02451bc85cf9dfa5b0ea106e7Ted Kremenek else 791892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitUnaryOperator(U, Pred, Dst); 7921b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek break; 79372374594c5d9ade02451bc85cf9dfa5b0ea106e7Ted Kremenek } 7941b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 7951b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek} 7961b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 797e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 798e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Block entrance. (Update counters). 799e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 800e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 80127c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenekvoid ExprEngine::processCFGBlockEntrance(ExplodedNodeSet &dstNodes, 80227c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek GenericNodeBuilder<BlockEntrance> &nodeBuilder){ 80327c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek 80427c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek // FIXME: Refactor this into a checker. 80527c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek const CFGBlock *block = nodeBuilder.getProgramPoint().getBlock(); 80627c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek ExplodedNode *pred = nodeBuilder.getPredecessor(); 80727c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek 80827c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek if (nodeBuilder.getBlockCounter().getNumVisited( 80927c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek pred->getLocationContext()->getCurrentStackFrame(), 81027c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek block->getBlockID()) >= AMgr.getMaxVisit()) { 81127c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek 81227c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek static int tag = 0; 813b6a2b08a6b3fbce1a6a4b69d4185165de970696cTed Kremenek nodeBuilder.generateNode(pred->getState(), pred, &tag, true); 81427c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek } 815e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek} 816e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 817e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 8181670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek// Generic node creation. 8191670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek//===----------------------------------------------------------------------===// 8201670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek 821d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios KyrtzidisExplodedNode* ExprEngine::MakeNode(ExplodedNodeSet& Dst, const Stmt* S, 822031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode* Pred, const GRState* St, 823031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ProgramPoint::Kind K, const void *tag) { 824d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis assert (Builder && "StmtNodeBuilder not present."); 8251670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek SaveAndRestore<const void*> OldTag(Builder->Tag); 8261670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek Builder->Tag = tag; 8271670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek return Builder->MakeNode(Dst, S, Pred, St, K); 8281670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek} 8291670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek 8301670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek//===----------------------------------------------------------------------===// 831e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Branch processing. 832e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 833e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 834d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisconst GRState* ExprEngine::MarkBranch(const GRState* state, 83503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Stmt* Terminator, 83603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu bool branchTaken) { 8371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 83805a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek switch (Terminator->getStmtClass()) { 83905a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek default: 840a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek return state; 8411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 84205a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek case Stmt::BinaryOperatorClass: { // '&&' and '||' 8431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 84403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const BinaryOperator* B = cast<BinaryOperator>(Terminator); 84505a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek BinaryOperator::Opcode Op = B->getOpcode(); 8461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8472de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert (Op == BO_LAnd || Op == BO_LOr); 8481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 84905a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // For &&, if we take the true branch, then the value of the whole 85005a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // expression is that of the RHS expression. 85105a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // 85205a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // For ||, if we take the false branch, then the value of the whole 85305a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // expression is that of the RHS expression. 8541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8552de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall const Expr* Ex = (Op == BO_LAnd && branchTaken) || 8562de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall (Op == BO_LOr && !branchTaken) 85703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ? B->getRHS() : B->getLHS(); 8581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8598e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek return state->BindExpr(B, UndefinedVal(Ex)); 86005a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek } 8611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 86256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall case Stmt::BinaryConditionalOperatorClass: 86305a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek case Stmt::ConditionalOperatorClass: { // ?: 86456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall const AbstractConditionalOperator* C 86556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall = cast<AbstractConditionalOperator>(Terminator); 8661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 86705a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // For ?, if branchTaken == true then the value is either the LHS or 86805a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // the condition itself. (GNU extension). 8691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 87003509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex; 8711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 87205a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek if (branchTaken) 87356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall Ex = C->getTrueExpr(); 87405a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek else 87556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall Ex = C->getFalseExpr(); 8761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8778e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek return state->BindExpr(C, UndefinedVal(Ex)); 87805a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek } 8791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 88005a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek case Stmt::ChooseExprClass: { // ?: 8811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 88203509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const ChooseExpr* C = cast<ChooseExpr>(Terminator); 8831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 88403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = branchTaken ? C->getLHS() : C->getRHS(); 8858e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek return state->BindExpr(C, UndefinedVal(Ex)); 88605a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek } 88705a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek } 88805a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek} 88905a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek 8906ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek/// RecoverCastedSymbol - A helper function for ProcessBranch that is used 8916ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek/// to try to recover some path-sensitivity for casts of symbolic 8926ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek/// integers that promote their values (which are currently not tracked well). 8936ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek/// This function returns the SVal bound to Condition->IgnoreCasts if all the 8946ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek// cast(s) did was sign-extend the original value. 8956ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenekstatic SVal RecoverCastedSymbol(GRStateManager& StateMgr, const GRState* state, 89603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Stmt* Condition, ASTContext& Ctx) { 8976ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 89803509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr *Ex = dyn_cast<Expr>(Condition); 8996ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek if (!Ex) 9006ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek return UnknownVal(); 9016ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 9026ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek uint64_t bits = 0; 9036ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek bool bitsInit = false; 9041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 90503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu while (const CastExpr *CE = dyn_cast<CastExpr>(Ex)) { 9066ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek QualType T = CE->getType(); 9076ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 9086ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek if (!T->isIntegerType()) 9096ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek return UnknownVal(); 9101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9116ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek uint64_t newBits = Ctx.getTypeSize(T); 9126ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek if (!bitsInit || newBits < bits) { 9136ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek bitsInit = true; 9146ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek bits = newBits; 9156ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek } 9161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9176ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek Ex = CE->getSubExpr(); 9186ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek } 9196ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 9206ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek // We reached a non-cast. Is it a symbolic value? 9216ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek QualType T = Ex->getType(); 9226ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 9236ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek if (!bitsInit || !T->isIntegerType() || Ctx.getTypeSize(T) > bits) 9246ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek return UnknownVal(); 9251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9261397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek return state->getSVal(Ex); 9276ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek} 9286ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 929e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processBranch(const Stmt* Condition, const Stmt* Term, 930d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis BranchNodeBuilder& builder) { 9311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 932b2331834a0515c80862ee51325c758a053829f15Ted Kremenek // Check for NULL conditions; e.g. "for(;;)" 9331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!Condition) { 934b2331834a0515c80862ee51325c758a053829f15Ted Kremenek builder.markInfeasible(false); 935b2331834a0515c80862ee51325c758a053829f15Ted Kremenek return; 936b2331834a0515c80862ee51325c758a053829f15Ted Kremenek } 9371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 93821028dd8850c64a414f7a82dfddcc291351203d6Ted Kremenek PrettyStackTraceLoc CrashInfo(getContext().getSourceManager(), 93921028dd8850c64a414f7a82dfddcc291351203d6Ted Kremenek Condition->getLocStart(), 94021028dd8850c64a414f7a82dfddcc291351203d6Ted Kremenek "Error evaluating branch"); 9410fb0bc4067d6c9d7c0e655300ef309b05d3adfc9Ted Kremenek 942cc05d511b26ac6dc80fcbcc78ac305d2755aa0b9Argyrios Kyrtzidis getCheckerManager().runCheckersForBranchCondition(Condition, builder, *this); 943cc05d511b26ac6dc80fcbcc78ac305d2755aa0b9Argyrios Kyrtzidis 9440835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // If the branch condition is undefined, return; 9450835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu if (!builder.isFeasible(true) && !builder.isFeasible(false)) 9460835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu return; 9471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9480835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu const GRState* PrevState = builder.getState(); 9491397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal X = PrevState->getSVal(Condition); 950b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek 95173c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis if (X.isUnknownOrUndef()) { 9520835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // Give it a chance to recover from unknown. 9530835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu if (const Expr *Ex = dyn_cast<Expr>(Condition)) { 9540835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu if (Ex->getType()->isIntegerType()) { 9550835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // Try to recover some path-sensitivity. Right now casts of symbolic 9560835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // integers that promote their values are currently not tracked well. 9570835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // If 'Condition' is such an expression, try and recover the 9580835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // underlying value and use that instead. 9590835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu SVal recovered = RecoverCastedSymbol(getStateManager(), 9600835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu builder.getState(), Condition, 9610835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu getContext()); 962b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 9630835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu if (!recovered.isUnknown()) { 9640835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu X = recovered; 9650835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu } 966b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 9670835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu } 9680835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // If the condition is still unknown, give up. 96973c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis if (X.isUnknownOrUndef()) { 9700835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu builder.generateNode(MarkBranch(PrevState, Term, true), true); 9710835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu builder.generateNode(MarkBranch(PrevState, Term, false), false); 972b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek return; 9731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 974b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 9751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9760835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu DefinedSVal V = cast<DefinedSVal>(X); 9770835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu 9786a6719a3a11087b48d9f1a4eb08b3bd43cb05a65Ted Kremenek // Process the true branch. 979520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek if (builder.isFeasible(true)) { 98028f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *state = PrevState->assume(V, true)) 981520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek builder.generateNode(MarkBranch(state, Term, true), true); 982520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek else 983520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek builder.markInfeasible(true); 984520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek } 9851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Process the false branch. 987520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek if (builder.isFeasible(false)) { 98828f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *state = PrevState->assume(V, false)) 989520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek builder.generateNode(MarkBranch(state, Term, false), false); 990520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek else 991520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek builder.markInfeasible(false); 992520035439d7133064325c4df6378c5a8f2f05539Ted Kremenek } 993f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek} 994f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek 995e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenek/// processIndirectGoto - Called by CoreEngine. Used to generate successor 996754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek/// nodes by processing the 'effects' of a computed goto jump. 997ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattnervoid ExprEngine::processIndirectGoto(IndirectGotoNodeBuilder &builder) { 998754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek 9991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const GRState *state = builder.getState(); 10001397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getSVal(builder.getTarget()); 10011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1002754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // Three possibilities: 1003754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // 1004754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // (1) We know the computed label. 10054a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek // (2) The label is NULL (or some other constant), or Undefined. 1006754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // (3) We have no clue about the label. Dispatch to all targets. 1007754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // 10081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1009d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis typedef IndirectGotoNodeBuilder::iterator iterator; 1010754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek 10111c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu if (isa<loc::GotoLabel>(V)) { 1012ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner const LabelDecl *L = cast<loc::GotoLabel>(V).getLabel(); 10131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1014ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner for (iterator I = builder.begin(), E = builder.end(); I != E; ++I) { 101524f1a967741ff9f8025ee23be12ba6feacc31f77Ted Kremenek if (I.getLabel() == L) { 1016a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek builder.generateNode(I, state); 1017754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek return; 1018754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek } 1019754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek } 10201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1021ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner assert(false && "No block with label."); 1022754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek return; 1023754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek } 1024754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek 10251c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu if (isa<loc::ConcreteInt>(V) || isa<UndefinedVal>(V)) { 1026754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // Dispatch to the first target and mark it as a sink. 10272055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu //ExplodedNode* N = builder.generateNode(builder.begin(), state, true); 10282055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu // FIXME: add checker visit. 10292055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu // UndefBranches.insert(N); 1030754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek return; 1031754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek } 10321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1033754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // This is really a catch-all. We don't support symbolics yet. 1034b3cfd58c9b13325d994e5f9b5065e6a22d91911dTed Kremenek // FIXME: Implement dispatch for symbolic pointers. 10351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1036754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek for (iterator I=builder.begin(), E=builder.end(); I != E; ++I) 1037a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek builder.generateNode(I, state); 1038754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek} 1039f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek 1040e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 1041d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitGuardedExpr(const Expr* Ex, const Expr* L, 104203509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* R, 1043031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode* Pred, ExplodedNodeSet& Dst) { 10441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10450a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek assert(Ex == currentStmt && 1046bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu Pred->getLocationContext()->getCFG()->isBlkExpr(Ex)); 10471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1048a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(Pred); 10491397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal X = state->getSVal(Ex); 10501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1051e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek assert (X.isUndef()); 10521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 105303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr *SE = (Expr*) cast<UndefinedVal>(X).getData(); 10541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(SE); 10551397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek X = state->getSVal(SE); 10561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1057e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // Make sure that we invalidate the previous binding. 10588e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, Ex, Pred, state->BindExpr(Ex, X, true)); 1059e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek} 1060e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 1061d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis/// ProcessEndPath - Called by CoreEngine. Used to generate end-of-path 106273099bfea9f5d4ec05265170bbefec3d76fb6b5eTed Kremenek/// nodes when the control reaches the end of a function. 1063e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processEndOfFunction(EndOfFunctionNodeBuilder& builder) { 10649c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek getTF().evalEndPath(*this, builder); 106573099bfea9f5d4ec05265170bbefec3d76fb6b5eTed Kremenek StateMgr.EndPath(builder.getState()); 1066af5800a1e287990bb547e052f257adeeae5ab476Argyrios Kyrtzidis getCheckerManager().runCheckersForEndPath(builder, *this); 106773099bfea9f5d4ec05265170bbefec3d76fb6b5eTed Kremenek} 106873099bfea9f5d4ec05265170bbefec3d76fb6b5eTed Kremenek 1069d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis/// ProcessSwitch - Called by CoreEngine. Used to generate successor 1070daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek/// nodes by processing the 'effects' of a switch statement. 1071e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processSwitch(SwitchNodeBuilder& builder) { 1072d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis typedef SwitchNodeBuilder::iterator iterator; 10731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const GRState* state = builder.getState(); 107403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* CondE = builder.getCondition(); 10751397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal CondV_untested = state->getSVal(CondE); 1076daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek 10775b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek if (CondV_untested.isUndef()) { 10782055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu //ExplodedNode* N = builder.generateDefaultCaseNode(state, true); 1079b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // FIXME: add checker 10802055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu //UndefBranches.insert(N); 10812055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu 1082daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek return; 1083daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 10845b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek DefinedOrUnknownSVal CondV = cast<DefinedOrUnknownSVal>(CondV_untested); 1085692416c214a3b234236dedcf875735a9cc29e90bTed Kremenek 10865b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek const GRState *DefaultSt = state; 108734feff654c6304e0a59ceb1376989d28dbc956ffTed Kremenek 108834feff654c6304e0a59ceb1376989d28dbc956ffTed Kremenek iterator I = builder.begin(), EI = builder.end(); 108934feff654c6304e0a59ceb1376989d28dbc956ffTed Kremenek bool defaultIsFeasible = I == EI; 10901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 109134feff654c6304e0a59ceb1376989d28dbc956ffTed Kremenek for ( ; I != EI; ++I) { 1092e71f3d587844110d836c82250830b27b1651afdbTed Kremenek // Successor may be pruned out during CFG construction. 1093e71f3d587844110d836c82250830b27b1651afdbTed Kremenek if (!I.getBlock()) 1094e71f3d587844110d836c82250830b27b1651afdbTed Kremenek continue; 1095e71f3d587844110d836c82250830b27b1651afdbTed Kremenek 1096412711774cf912bac8e81ef86da33acac6856b8aTed Kremenek const CaseStmt* Case = I.getCase(); 109772afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek 109872afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek // Evaluate the LHS of the case value. 109972afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek Expr::EvalResult V1; 11001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool b = Case->getLHS()->Evaluate(V1, getContext()); 11011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 110272afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek // Sanity checks. These go away in Release builds. 11031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(b && V1.Val.isInt() && !V1.HasSideEffects 110472afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek && "Case condition must evaluate to an integer constant."); 1105c6ed729f669044f5072a49d79041f455d971ece3Jeffrey Yasskin (void)b; // silence unused variable warning 11061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(V1.Val.getInt().getBitWidth() == 110772afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek getContext().getTypeSize(CondE->getType())); 11081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1109daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // Get the RHS of the case, if it exists. 111072afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek Expr::EvalResult V2; 11111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 111203509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const Expr* E = Case->getRHS()) { 111372afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek b = E->Evaluate(V2, getContext()); 11141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(b && V2.Val.isInt() && !V2.HasSideEffects 111572afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek && "Case condition must evaluate to an integer constant."); 1116c6ed729f669044f5072a49d79041f455d971ece3Jeffrey Yasskin (void)b; // silence unused variable warning 1117daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 111814a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek else 111914a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek V2 = V1; 11201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1121daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // FIXME: Eventually we should replace the logic below with a range 1122daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // comparison, rather than concretize the values within the range. 1123aa1c4e5a6b87b62d991c55a0d4522bcd778068d7Ted Kremenek // This should be easy once we have "ranges" for NonLVals. 11241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 112514a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek do { 11261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump nonloc::ConcreteInt CaseVal(getBasicVals().getValue(V1.Val.getInt())); 11279c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek DefinedOrUnknownSVal Res = svalBuilder.evalEQ(DefaultSt ? DefaultSt : state, 112848569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek CondV, CaseVal); 1129b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 11301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Now "assume" that the case matches. 113128f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState* stateNew = state->assume(Res, true)) { 1132a591bc04d21fa62ebffcb2c7814d738ca8f5e2f9Ted Kremenek builder.generateCaseStmtNode(I, stateNew); 11331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1134daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // If CondV evaluates to a constant, then we know that this 1135daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // is the *only* case that we can take, so stop evaluating the 1136daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // others. 11371c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu if (isa<nonloc::ConcreteInt>(CondV)) 1138daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek return; 1139daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 11401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1141daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // Now "assume" that the case doesn't match. Add this state 1142daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // to the default state (if it is feasible). 114348569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek if (DefaultSt) { 114428f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *stateNew = DefaultSt->assume(Res, false)) { 114548569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek defaultIsFeasible = true; 114648569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek DefaultSt = stateNew; 114748569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek } 114848569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek else { 114948569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek defaultIsFeasible = false; 115048569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek DefaultSt = NULL; 115148569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek } 11525014ab113eb211b8320ae30b173d7020352663c6Ted Kremenek } 1153b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 115414a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek // Concretize the next value in the range. 115572afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek if (V1.Val.getInt() == V2.Val.getInt()) 115614a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek break; 11571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 115872afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek ++V1.Val.getInt(); 115972afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek assert (V1.Val.getInt() <= V2.Val.getInt()); 11601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 116114a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek } while (true); 1162daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 11631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11644d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek if (!defaultIsFeasible) 11654d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek return; 11664d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek 11674d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // If we have switch(enum value), the default branch is not 11684d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // feasible if all of the enum constants not covered by 'case:' statements 11694d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // are not feasible values for the switch condition. 11704d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // 11714d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // Note that this isn't as accurate as it could be. Even if there isn't 11724d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // a case for a particular enum value as long as that enum value isn't 11734d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // feasible then it shouldn't be considered for making 'default:' reachable. 11744d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek const SwitchStmt *SS = builder.getSwitch(); 11754d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek const Expr *CondExpr = SS->getCond()->IgnoreParenImpCasts(); 11764d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek if (CondExpr->getType()->getAs<EnumType>()) { 11774d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek if (SS->isAllEnumCasesCovered()) 11784d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek return; 11794d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek } 11804d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek 11814d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek builder.generateDefaultCaseNode(DefaultSt); 1182daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek} 1183daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek 1184e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processCallEnter(CallEnterNodeBuilder &B) { 11852ccf047adf877f5e821210b1ce1a2c8289acadc0Ted Kremenek const GRState *state = B.getState()->enterStackFrame(B.getCalleeContext()); 1186d048c6ef5b6cfaa0cecb8cc1d4bdace32ed21d07Ted Kremenek B.generateNode(state); 1187102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor} 1188102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor 1189e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processCallExit(CallExitNodeBuilder &B) { 1190102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor const GRState *state = B.getState(); 1191102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor const ExplodedNode *Pred = B.getPredecessor(); 119219b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu const StackFrameContext *calleeCtx = 1193102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor cast<StackFrameContext>(Pred->getLocationContext()); 119419b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu const Stmt *CE = calleeCtx->getCallSite(); 1195102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor 11966190ec29f0895185bbec95a932429b8832917fecZhongxing Xu // If the callee returns an expression, bind its value to CallExpr. 11976190ec29f0895185bbec95a932429b8832917fecZhongxing Xu const Stmt *ReturnedExpr = state->get<ReturnExpr>(); 11986190ec29f0895185bbec95a932429b8832917fecZhongxing Xu if (ReturnedExpr) { 11996190ec29f0895185bbec95a932429b8832917fecZhongxing Xu SVal RetVal = state->getSVal(ReturnedExpr); 12006190ec29f0895185bbec95a932429b8832917fecZhongxing Xu state = state->BindExpr(CE, RetVal); 1201bd2b2084e58577f17308f910770a5563a344251aZhongxing Xu // Clear the return expr GDM. 12020541d106eae48f4238097df03a72028a610e0dceZhongxing Xu state = state->remove<ReturnExpr>(); 12036190ec29f0895185bbec95a932429b8832917fecZhongxing Xu } 12046190ec29f0895185bbec95a932429b8832917fecZhongxing Xu 12058e18c1b840882d26039503629d7e4ad4822f3bdaZhongxing Xu // Bind the constructed object value to CXXConstructExpr. 12068e18c1b840882d26039503629d7e4ad4822f3bdaZhongxing Xu if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(CE)) { 12079dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu const CXXThisRegion *ThisR = 120819b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu getCXXThisRegion(CCE->getConstructor()->getParent(), calleeCtx); 1209d706434b0231c76fd9acf30060646a7aa8f69aefZhongxing Xu 12108e18c1b840882d26039503629d7e4ad4822f3bdaZhongxing Xu SVal ThisV = state->getSVal(ThisR); 121105e539175d9bac678fca8e77665e88b685729850Zhongxing Xu // Always bind the region to the CXXConstructExpr. 121205e539175d9bac678fca8e77665e88b685729850Zhongxing Xu state = state->BindExpr(CCE, ThisV); 12138e18c1b840882d26039503629d7e4ad4822f3bdaZhongxing Xu } 12148e18c1b840882d26039503629d7e4ad4822f3bdaZhongxing Xu 1215d048c6ef5b6cfaa0cecb8cc1d4bdace32ed21d07Ted Kremenek B.generateNode(state); 1216102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor} 1217102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor 1218e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1219e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Transfer functions: logical operations ('&&', '||'). 1220e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1221daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek 1222d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitLogicalExpr(const BinaryOperator* B, ExplodedNode* Pred, 1223031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet& Dst) { 12241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12252de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert(B->getOpcode() == BO_LAnd || 12262de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall B->getOpcode() == BO_LOr); 12271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12280a3ed3143b00f237decb1288c1ff574ae09eba4eTed Kremenek assert(B==currentStmt && Pred->getLocationContext()->getCFG()->isBlkExpr(B)); 12291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1230a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(Pred); 12311397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal X = state->getSVal(B); 12323ff12591494a3cb3d3a24427975df58714ac3b2fTed Kremenek assert(X.isUndef()); 12331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12345b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek const Expr *Ex = (const Expr*) cast<UndefinedVal>(X).getData(); 12353ff12591494a3cb3d3a24427975df58714ac3b2fTed Kremenek assert(Ex); 12361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 123705a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek if (Ex == B->getRHS()) { 12381397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek X = state->getSVal(Ex); 12391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12404a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek // Handle undefined values. 12414a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek if (X.isUndef()) { 12428e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, B, Pred, state->BindExpr(B, X)); 124358b3321009b3f750fb4587b12c2024bb77e6ebf0Ted Kremenek return; 124458b3321009b3f750fb4587b12c2024bb77e6ebf0Ted Kremenek } 1245b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 12465b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek DefinedOrUnknownSVal XD = cast<DefinedOrUnknownSVal>(X); 12471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 124805a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // We took the RHS. Because the value of the '&&' or '||' expression must 124905a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // evaluate to 0 or 1, we must assume the value of the RHS evaluates to 0 125005a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // or 1. Alternatively, we could take a lazy approach, and calculate this 125105a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // value later when necessary. We don't have the machinery in place for 125205a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // this right now, and since most logical expressions are used for branches, 12531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // the payoff is not likely to be large. Instead, we do eager evaluation. 125428f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *newState = state->assume(XD, true)) 12551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump MakeNode(Dst, B, Pred, 1256c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek newState->BindExpr(B, svalBuilder.makeIntVal(1U, B->getType()))); 12571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 125828f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *newState = state->assume(XD, false)) 12591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump MakeNode(Dst, B, Pred, 1260c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek newState->BindExpr(B, svalBuilder.makeIntVal(0U, B->getType()))); 1261f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek } 1262f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek else { 126305a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // We took the LHS expression. Depending on whether we are '&&' or 126405a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // '||' we know what the value of the expression is via properties of 126505a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek // the short-circuiting. 1266c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek X = svalBuilder.makeIntVal(B->getOpcode() == BO_LAnd ? 0U : 1U, 1267d91ee27950ef5c321db1ac2aa5becb75ffe7cb14Zhongxing Xu B->getType()); 12688e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, B, Pred, state->BindExpr(B, X)); 126905a2378c708688c8ef498a5cea40ed7f5db15fa5Ted Kremenek } 127071c29bdc931bc49644c581ec7d698f0dbf01a0aaTed Kremenek} 12711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1272e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1273ec96a2d52d16e150baaf629cd35e3fabff5d8915Ted Kremenek// Transfer functions: Loads and stores. 1274e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1275d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek 1276d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitBlockExpr(const BlockExpr *BE, ExplodedNode *Pred, 1277c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek ExplodedNodeSet &Dst) { 1278b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 127966078610be5e4319de02efa283b07887c73c2e27Ted Kremenek ExplodedNodeSet Tmp; 1280b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1281c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek CanQualType T = getContext().getCanonicalType(BE->getType()); 1282c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.getBlockPointer(BE->getBlockDecl(), T, 12830a8112a78d00b5140c5b7f16c3b34c2c0c13c1a0Ted Kremenek Pred->getLocationContext()); 12840a8112a78d00b5140c5b7f16c3b34c2c0c13c1a0Ted Kremenek 128566078610be5e4319de02efa283b07887c73c2e27Ted Kremenek MakeNode(Tmp, BE, Pred, GetState(Pred)->BindExpr(BE, V), 1286c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek ProgramPoint::PostLValueKind); 1287b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 128866078610be5e4319de02efa283b07887c73c2e27Ted Kremenek // Post-visit the BlockExpr. 1289eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPostStmt(Dst, Tmp, BE, *this); 1290c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek} 1291c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek 1292d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitCommonDeclRefExpr(const Expr *Ex, const NamedDecl *D, 1293d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNode *Pred, 1294d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNodeSet &Dst) { 12955b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek const GRState *state = GetState(Pred); 12966d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu 12976d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu if (const VarDecl* VD = dyn_cast<VarDecl>(D)) { 1298892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek assert(Ex->isLValue()); 1299d17da2b99f323fa91b01e1dd119cc32e0ee8197dTed Kremenek SVal V = state->getLValue(VD, Pred->getLocationContext()); 1300a7581731b1453b51b26154d2409d42a5b6395079Zhongxing Xu 1301892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // For references, the 'lvalue' is the pointer address stored in the 1302892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // reference region. 1303892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (VD->getType()->isReferenceType()) { 1304892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (const MemRegion *R = V.getAsRegion()) 1305892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek V = state->getSVal(R); 1306892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek else 1307892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek V = UnknownVal(); 1308852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 13096d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu 1310892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek MakeNode(Dst, Ex, Pred, state->BindExpr(Ex, V), 1311892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ProgramPoint::PostLValueKind); 1312852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return; 1313892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 1314892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (const EnumConstantDecl* ED = dyn_cast<EnumConstantDecl>(D)) { 1315892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek assert(!Ex->isLValue()); 1316c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.makeIntVal(ED->getInitVal()); 13178e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, Ex, Pred, state->BindExpr(Ex, V)); 13186d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu return; 1319892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 1320892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (const FunctionDecl* FD = dyn_cast<FunctionDecl>(D)) { 1321c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.getFunctionPointer(FD); 13228e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, Ex, Pred, state->BindExpr(Ex, V), 13237090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek ProgramPoint::PostLValueKind); 13246d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu return; 13251b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 13266d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu assert (false && 13276d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu "ValueDecl support for this ValueDecl not implemented."); 13283271f8d315712885ac87747369bb1d9f4b1ea81fTed Kremenek} 13293271f8d315712885ac87747369bb1d9f4b1ea81fTed Kremenek 1330540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek/// VisitArraySubscriptExpr - Transfer function for array accesses 1331d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitLvalArraySubscriptExpr(const ArraySubscriptExpr* A, 1332d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNode* Pred, 1333d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNodeSet& Dst){ 13341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 133503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Base = A->getBase()->IgnoreParens(); 133603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Idx = A->getIdx()->IgnoreParens(); 1337892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek 1338892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // Evaluate the base. 1339031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 1340892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(Base, Pred, Tmp); 13411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1342031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I1=Tmp.begin(), E1=Tmp.end(); I1!=E1; ++I1) { 1343031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp2; 1344d9bc33efa195114d6f2a365c26e5b8dba4e1cc38Ted Kremenek Visit(Idx, *I1, Tmp2); // Evaluate the index. 1345d694485f9d6e3ea7b458df8241dfffd38f62aca8Zhongxing Xu ExplodedNodeSet Tmp3; 1346eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(Tmp3, Tmp2, A, *this); 1347d694485f9d6e3ea7b458df8241dfffd38f62aca8Zhongxing Xu 1348d694485f9d6e3ea7b458df8241dfffd38f62aca8Zhongxing Xu for (ExplodedNodeSet::iterator I2=Tmp3.begin(),E2=Tmp3.end();I2!=E2; ++I2) { 1349a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I2); 13501397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getLValue(A->getType(), state->getSVal(Idx), 13511397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek state->getSVal(Base)); 1352892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek assert(A->isLValue()); 1353892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek MakeNode(Dst, A, *I2, state->BindExpr(A, V), ProgramPoint::PostLValueKind); 13544d0348b6c74d2710a3693bbfbcfc5fcb3bc132eeTed Kremenek } 13551b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 1356540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek} 1357540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek 1358469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek/// VisitMemberExpr - Transfer function for member expressions. 1359d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitMemberExpr(const MemberExpr* M, ExplodedNode* Pred, 1360d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNodeSet& Dst) { 13611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1362892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Expr *baseExpr = M->getBase()->IgnoreParens(); 1363892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet dstBase; 1364892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(baseExpr, Pred, dstBase); 13651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1366892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek FieldDecl *field = dyn_cast<FieldDecl>(M->getMemberDecl()); 1367892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (!field) // FIXME: skipping member expressions for non-fields 136886f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor return; 136986f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 1370892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek for (ExplodedNodeSet::iterator I = dstBase.begin(), E = dstBase.end(); 1371892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek I != E; ++I) { 1372a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 1373892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal baseExprVal = state->getSVal(baseExpr); 1374892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (isa<nonloc::LazyCompoundVal>(baseExprVal) || 1375c2e20d0c42cf085940c9a9cb495a7116d1b0eb07Argyrios Kyrtzidis isa<nonloc::CompoundVal>(baseExprVal) || 1376c2e20d0c42cf085940c9a9cb495a7116d1b0eb07Argyrios Kyrtzidis // FIXME: This can originate by conjuring a symbol for an unknown 1377c2e20d0c42cf085940c9a9cb495a7116d1b0eb07Argyrios Kyrtzidis // temporary struct object, see test/Analysis/fields.c: 1378c2e20d0c42cf085940c9a9cb495a7116d1b0eb07Argyrios Kyrtzidis // (p = getit()).x 1379c2e20d0c42cf085940c9a9cb495a7116d1b0eb07Argyrios Kyrtzidis isa<nonloc::SymbolVal>(baseExprVal)) { 1380892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek MakeNode(Dst, M, *I, state->BindExpr(M, UnknownVal())); 1381892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek continue; 1382892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 1383892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek 1384d9bc33efa195114d6f2a365c26e5b8dba4e1cc38Ted Kremenek // FIXME: Should we insert some assumption logic in here to determine 1385d9bc33efa195114d6f2a365c26e5b8dba4e1cc38Ted Kremenek // if "Base" is a valid piece of memory? Before we put this assumption 138686f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // later when using FieldOffset lvals (which we no longer have). 1387d9bc33efa195114d6f2a365c26e5b8dba4e1cc38Ted Kremenek 1388892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // For all other cases, compute an lvalue. 1389892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal L = state->getLValue(field, baseExprVal); 1390892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (M->isLValue()) 1391662174ca204cb520f634bdcb34a3708f45389d14Zhongxing Xu MakeNode(Dst, M, *I, state->BindExpr(M, L), ProgramPoint::PostLValueKind); 1392662174ca204cb520f634bdcb34a3708f45389d14Zhongxing Xu else 13939c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLoad(Dst, M, *I, state, L); 1394469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek } 1395469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek} 1396469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek 13979c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek/// evalBind - Handle the semantics of binding a value to a specific location. 13989c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek/// This method is used by evalStore and (soon) VisitDeclStmt, and others. 1399d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalBind(ExplodedNodeSet& Dst, const Stmt* StoreE, 140079d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek ExplodedNode* Pred, const GRState* state, 140179d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek SVal location, SVal Val, bool atDeclInit) { 1402b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1403b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1404b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // Do a previsit of the bind. 1405b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek ExplodedNodeSet CheckedSet, Src; 1406b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek Src.Add(Pred); 1407eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForBind(CheckedSet, Src, location, Val, StoreE, 1408eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis *this); 1409b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1410b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek for (ExplodedNodeSet::iterator I = CheckedSet.begin(), E = CheckedSet.end(); 1411b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek I!=E; ++I) { 1412b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1413b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek if (Pred != *I) 1414b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek state = GetState(*I); 1415b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1416b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek const GRState* newState = 0; 1417a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek 1418b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek if (atDeclInit) { 1419b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek const VarRegion *VR = 1420b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek cast<VarRegion>(cast<loc::MemRegionVal>(location).getRegion()); 1421f6f56d4fc8ebce17e7b83eb2c35f57a055c22283Ted Kremenek 1422b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek newState = state->bindDecl(VR, Val); 1423f6f56d4fc8ebce17e7b83eb2c35f57a055c22283Ted Kremenek } 1424f6f56d4fc8ebce17e7b83eb2c35f57a055c22283Ted Kremenek else { 1425b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek if (location.isUnknown()) { 1426b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // We know that the new state will be the same as the old state since 1427b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // the location of the binding is "unknown". Consequently, there 1428b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // is no reason to just create a new node. 1429b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek newState = state; 1430b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek } 1431b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek else { 1432b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // We are binding to a value other than 'unknown'. Perform the binding 1433b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // using the StoreManager. 1434b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek newState = state->bindLoc(cast<Loc>(location), Val); 1435b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek } 1436f6f56d4fc8ebce17e7b83eb2c35f57a055c22283Ted Kremenek } 1437a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek 1438d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis // The next thing to do is check if the TransferFuncs object wants to 1439b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // update the state based on the new binding. If the GRTransferFunc object 1440b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // doesn't do anything, just auto-propagate the current state. 144179d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek 144279d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek // NOTE: We use 'AssignE' for the location of the PostStore if 'AssignE' 144379d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek // is non-NULL. Checkers typically care about 144479d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek 1445d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis StmtNodeBuilderRef BuilderRef(Dst, *Builder, *this, *I, newState, StoreE, 144696ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek true); 14471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14489c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek getTF().evalBind(BuilderRef, location, Val); 1449b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek } 1450a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek} 1451a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek 14529c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek/// evalStore - Handle the semantics of a store via an assignment. 1453a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek/// @param Dst The node set to store generated state nodes 1454e8a4d7d0064b357a30fe7ee4f2ddc02f9ffc0357Zhongxing Xu/// @param AssignE The assignment expression if the store happens in an 1455e8a4d7d0064b357a30fe7ee4f2ddc02f9ffc0357Zhongxing Xu/// assignment. 1456e8a4d7d0064b357a30fe7ee4f2ddc02f9ffc0357Zhongxing Xu/// @param LocatioinE The location expression that is stored to. 1457a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek/// @param state The current simulation state 1458a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek/// @param location The location to store the value 1459a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek/// @param Val The value to be stored 1460d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalStore(ExplodedNodeSet& Dst, const Expr *AssignE, 146179d73044b7d0adfbd18ee34285395e1d5135f662Ted Kremenek const Expr* LocationE, 146250ecd1536a2b70327e9eb2c2c2a652cde3dae365Ted Kremenek ExplodedNode* Pred, 14631670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek const GRState* state, SVal location, SVal Val, 14641670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek const void *tag) { 14651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1466d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis assert(Builder && "StmtNodeBuilder must be defined."); 14671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 146814429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis // Proceed with the store. We use AssignE as the anchor for the PostStore 146914429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis // ProgramPoint if it is non-NULL, and LocationE otherwise. 147014429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis const Expr *StoreE = AssignE ? AssignE : LocationE; 147114429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 147214429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis if (isa<loc::ObjCPropRef>(location)) { 147314429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis loc::ObjCPropRef prop = cast<loc::ObjCPropRef>(location); 147414429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNodeSet src = Pred; 147514429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis return VisitObjCMessage(ObjCPropertySetter(prop.getPropRefExpr(), 147614429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis StoreE, Val), src, Dst); 147714429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis } 147814429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 14791b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Evaluate the location (checks for bad dereferences). 1480b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ExplodedNodeSet Tmp; 14819c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLocation(Tmp, LocationE, Pred, state, location, tag, false); 14821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1483b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (Tmp.empty()) 14841b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek return; 1485b0533965f1b4db020692e3b23ca7b3bc15bf5897Ted Kremenek 148673c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis if (location.isUndef()) 148773c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis return; 1488a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek 1489b4b817d704287836b52b34369009e682f208aa2bTed Kremenek SaveAndRestore<ProgramPoint::Kind> OldSPointKind(Builder->PointKind, 1490b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ProgramPoint::PostStoreKind); 1491b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1492b4b817d704287836b52b34369009e682f208aa2bTed Kremenek for (ExplodedNodeSet::iterator NI=Tmp.begin(), NE=Tmp.end(); NI!=NE; ++NI) 14939c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalBind(Dst, StoreE, *NI, GetState(*NI), location, Val); 14941b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek} 14951b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 1496d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalLoad(ExplodedNodeSet& Dst, const Expr *Ex, 14973992a50eea030a2913f1d267554f55ecd00d694cZhongxing Xu ExplodedNode* Pred, 14981670e403c48f3af4fceff3f6773a0e1cfc6c4eb3Ted Kremenek const GRState* state, SVal location, 1499652be346f74feba027bcbdeb6a3e3f4755a0e62cZhongxing Xu const void *tag, QualType LoadTy) { 1500cca8ab155e8c20b98ba2d90eb2b1c228895e06fdZhanyong Wan assert(!isa<NonLoc>(location) && "location cannot be a NonLoc."); 15011b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 150214429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis if (isa<loc::ObjCPropRef>(location)) { 150314429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis loc::ObjCPropRef prop = cast<loc::ObjCPropRef>(location); 150414429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNodeSet src = Pred; 150514429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis return VisitObjCMessage(ObjCPropertyGetter(prop.getPropRefExpr(), Ex), 150614429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis src, Dst); 150714429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis } 150814429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 1509852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek // Are we loading from a region? This actually results in two loads; one 1510852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek // to fetch the address of the referenced value and one to fetch the 1511852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek // referenced value. 1512b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek if (const TypedRegion *TR = 1513852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek dyn_cast_or_null<TypedRegion>(location.getAsRegion())) { 1514b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1515018220c343c103b7dfaa117a7a474c7a7fd6d068Zhongxing Xu QualType ValTy = TR->getValueType(); 1516852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (const ReferenceType *RT = ValTy->getAs<ReferenceType>()) { 1517b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek static int loadReferenceTag = 0; 1518852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek ExplodedNodeSet Tmp; 15199c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLoadCommon(Tmp, Ex, Pred, state, location, &loadReferenceTag, 1520852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek getContext().getPointerType(RT->getPointeeType())); 1521852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek 1522852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek // Perform the load from the referenced value. 1523852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end() ; I!=E; ++I) { 1524852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek state = GetState(*I); 15251397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek location = state->getSVal(Ex); 15269c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLoadCommon(Dst, Ex, *I, state, location, tag, LoadTy); 1527b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek } 1528852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return; 1529852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 1530852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 1531b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 15329c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLoadCommon(Dst, Ex, Pred, state, location, tag, LoadTy); 1533852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek} 1534852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek 1535d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalLoadCommon(ExplodedNodeSet& Dst, const Expr *Ex, 1536852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek ExplodedNode* Pred, 1537852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek const GRState* state, SVal location, 1538852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek const void *tag, QualType LoadTy) { 1539b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 15401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Evaluate the location (checks for bad dereferences). 1541b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ExplodedNodeSet Tmp; 15429c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLocation(Tmp, Ex, Pred, state, location, tag, true); 15431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1544b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (Tmp.empty()) 15451b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek return; 1546b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 154773c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis if (location.isUndef()) 154873c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis return; 1549b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1550b4b817d704287836b52b34369009e682f208aa2bTed Kremenek SaveAndRestore<ProgramPoint::Kind> OldSPointKind(Builder->PointKind); 15511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15521b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Proceed with the load. 1553b4b817d704287836b52b34369009e682f208aa2bTed Kremenek for (ExplodedNodeSet::iterator NI=Tmp.begin(), NE=Tmp.end(); NI!=NE; ++NI) { 1554b4b817d704287836b52b34369009e682f208aa2bTed Kremenek state = GetState(*NI); 155596ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek 1556b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (location.isUnknown()) { 1557b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // This is important. We must nuke the old binding. 1558b4b817d704287836b52b34369009e682f208aa2bTed Kremenek MakeNode(Dst, Ex, *NI, state->BindExpr(Ex, UnknownVal()), 1559b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ProgramPoint::PostLoadKind, tag); 1560b4b817d704287836b52b34369009e682f208aa2bTed Kremenek } 1561b4b817d704287836b52b34369009e682f208aa2bTed Kremenek else { 156296ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek if (LoadTy.isNull()) 156396ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek LoadTy = Ex->getType(); 156496ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek SVal V = state->getSVal(cast<Loc>(location), LoadTy); 156596ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek MakeNode(Dst, Ex, *NI, state->bindExprAndLocation(Ex, location, V), 156696ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek ProgramPoint::PostLoadKind, tag); 1567b4b817d704287836b52b34369009e682f208aa2bTed Kremenek } 1568d5b499d43c3526fae7f9ebb6e2d50e79d3496cedZhongxing Xu } 15691b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek} 15701b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 1571d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalLocation(ExplodedNodeSet &Dst, const Stmt *S, 1572b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ExplodedNode* Pred, 1573b4b817d704287836b52b34369009e682f208aa2bTed Kremenek const GRState* state, SVal location, 1574b4b817d704287836b52b34369009e682f208aa2bTed Kremenek const void *tag, bool isLoad) { 157500b1ad2d56f3e39f95c3f61bf511a531ab6a4fa5Zhongxing Xu // Early checks for performance reason. 1576769ce3e93ad35bd9ac28e4d8b8f035ae4fd9a5b5Argyrios Kyrtzidis if (location.isUnknown()) { 1577b4b817d704287836b52b34369009e682f208aa2bTed Kremenek Dst.Add(Pred); 1578b4b817d704287836b52b34369009e682f208aa2bTed Kremenek return; 1579b4b817d704287836b52b34369009e682f208aa2bTed Kremenek } 1580b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 15819c0d6891b3ec4b0d20b8a295946c0dc5426d147cArgyrios Kyrtzidis ExplodedNodeSet Src; 1582eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis if (Builder->GetState(Pred) == state) { 1583eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis Src.Add(Pred); 1584eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis } else { 1585eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // Associate this new state with an ExplodedNode. 1586eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // FIXME: If I pass null tag, the graph is incorrect, e.g for 1587eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // int *p; 1588eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // p = 0; 1589eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // *p = 0xDEADBEEF; 1590eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // "p = 0" is not noted as "Null pointer value stored to 'p'" but 1591eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // instead "int *p" is noted as 1592eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // "Variable 'p' initialized to a null pointer value" 1593eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis ExplodedNode *N = Builder->generateNode(S, state, Pred, this); 1594eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis Src.Add(N ? N : Pred); 15950296c22557b3735e2ffeff690eb46fb0e9152bccTed Kremenek } 1596eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForLocation(Dst, Src, location, isLoad, S, 1597eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis *this); 1598ec96a2d52d16e150baaf629cd35e3fabff5d8915Ted Kremenek} 1599ec96a2d52d16e150baaf629cd35e3fabff5d8915Ted Kremenek 1600d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisbool ExprEngine::InlineCall(ExplodedNodeSet &Dst, const CallExpr *CE, 16011c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu ExplodedNode *Pred) { 1602b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek return false; 1603b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1604b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Inlining isn't correct right now because we: 1605b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // (a) don't generate CallExit nodes. 1606b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // (b) we need a way to postpone doing post-visits of CallExprs until 1607b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // the CallExit. This means we need CallExits for the non-inline 1608b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // cases as well. 1609b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1610b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek#if 0 16111c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu const GRState *state = GetState(Pred); 16121c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu const Expr *Callee = CE->getCallee(); 16131c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu SVal L = state->getSVal(Callee); 16141c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu 16151c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu const FunctionDecl *FD = L.getAsFunctionDecl(); 16161c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu if (!FD) 16171c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu return false; 16181c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu 1619b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Specially handle CXXMethods. 1620b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const CXXMethodDecl *methodDecl = 0; 1621b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1622b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek switch (CE->getStmtClass()) { 1623b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek default: break; 1624b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CXXOperatorCallExprClass: { 1625b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const CXXOperatorCallExpr *opCall = cast<CXXOperatorCallExpr>(CE); 1626b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek methodDecl = 16275f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner dyn_cast_or_null<CXXMethodDecl>(opCall->getCalleeDecl()); 1628b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek break; 1629b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek } 1630b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CXXMemberCallExprClass: { 1631b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const CXXMemberCallExpr *memberCall = cast<CXXMemberCallExpr>(CE); 1632b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const MemberExpr *memberExpr = 1633b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek cast<MemberExpr>(memberCall->getCallee()->IgnoreParens()); 1634b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek methodDecl = cast<CXXMethodDecl>(memberExpr->getMemberDecl()); 1635b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek break; 1636b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek } 1637b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek } 1638b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1639b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1640b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1641b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1642c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu // Check if the function definition is in the same translation unit. 1643c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu if (FD->hasBody(FD)) { 164419b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu const StackFrameContext *stackFrame = 164519b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu AMgr.getStackFrame(AMgr.getAnalysisContext(FD), 164619b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu Pred->getLocationContext(), 1647892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek CE, Builder->getBlock(), Builder->getIndex()); 1648c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu // Now we have the definition of the callee, create a CallEnter node. 164919b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu CallEnter Loc(CE, stackFrame, Pred->getLocationContext()); 1650c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu 1651c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu ExplodedNode *N = Builder->generateNode(Loc, state, Pred); 1652c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu Dst.Add(N); 1653c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu return true; 1654c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu } 16551c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu 1656c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu // Check if we can find the function definition in other translation units. 1657c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu if (AMgr.hasIndexer()) { 165819b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu AnalysisContext *C = AMgr.getAnalysisContextInAnotherTU(FD); 1659c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu if (C == 0) 1660c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu return false; 166119b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu const StackFrameContext *stackFrame = 166219b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu AMgr.getStackFrame(C, Pred->getLocationContext(), 1663892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek CE, Builder->getBlock(), Builder->getIndex()); 166419b78d9e3dbbc27bbcbdd8c3017a00fe88849ecdZhongxing Xu CallEnter Loc(CE, stackFrame, Pred->getLocationContext()); 1665c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu ExplodedNode *N = Builder->generateNode(Loc, state, Pred); 16661c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu Dst.Add(N); 1667c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu return true; 1668c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu } 1669b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1670b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Generate the CallExit node. 1671c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu 1672c6238d2786cfd961b94580b3d3675a1b3ff0721cZhongxing Xu return false; 1673b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek#endif 16741c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu} 16751c625f25055331bf76ab5479a8060d2b0f61e8b8Zhongxing Xu 1676b277159055933e610bbc80262b600d3ad7e0595cTed Kremenekvoid ExprEngine::VisitCallExpr(const CallExpr* CE, ExplodedNode* Pred, 1677b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek ExplodedNodeSet& dst) { 16783cead901aab394fe8e84953235959ece8002854fTed Kremenek 16799d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // Determine the type of function we're calling (if available). 168072564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor const FunctionProtoType *Proto = NULL; 16819d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor QualType FnType = CE->getCallee()->IgnoreParens()->getType(); 16826217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek if (const PointerType *FnTypePtr = FnType->getAs<PointerType>()) 1683183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall Proto = FnTypePtr->getPointeeType()->getAs<FunctionProtoType>(); 16849d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor 1685b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Should the first argument be evaluated as an lvalue? 1686b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek bool firstArgumentAsLvalue = false; 1687b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek switch (CE->getStmtClass()) { 1688b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CXXOperatorCallExprClass: 1689b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek firstArgumentAsLvalue = true; 1690b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek break; 1691b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek default: 1692b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek break; 16935a5d98bc6962dc2d1aaa5e0e522f1bf84273b9c1Ted Kremenek } 1694b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1695b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Evaluate the arguments. 1696b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek ExplodedNodeSet dstArgsEvaluated; 1697b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek evalArguments(CE->arg_begin(), CE->arg_end(), Proto, Pred, dstArgsEvaluated, 1698b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek firstArgumentAsLvalue); 1699b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1700b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Evaluate the callee. 1701b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek ExplodedNodeSet dstCalleeEvaluated; 1702b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek evalCallee(CE, dstArgsEvaluated, dstCalleeEvaluated); 1703b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1704b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Perform the previsit of the CallExpr. 1705b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek ExplodedNodeSet dstPreVisit; 1706b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, dstCalleeEvaluated, 1707b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek CE, *this); 1708b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1709b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Now evaluate the call itself. 1710eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis class DefaultEval : public GraphExpander { 1711eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis ExprEngine &Eng; 1712eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis const CallExpr *CE; 1713eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis public: 1714eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis 1715eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis DefaultEval(ExprEngine &eng, const CallExpr *ce) 1716b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek : Eng(eng), CE(ce) {} 1717eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis virtual void expandGraph(ExplodedNodeSet &Dst, ExplodedNode *Pred) { 1718b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Should we inline the call? 1719eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis if (Eng.getAnalysisManager().shouldInlineCall() && 1720eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis Eng.InlineCall(Dst, CE, Pred)) { 1721b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek return; 172217f4da8f150f6b9dfb571cebd6299b06948e5385Ted Kremenek } 1723b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1724b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek StmtNodeBuilder &Builder = Eng.getBuilder(); 1725b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek assert(&Builder && "StmtNodeBuilder must be defined."); 1726b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1727b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Dispatch to the plug-in transfer function. 1728b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek unsigned oldSize = Dst.size(); 1729b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek SaveOr OldHasGen(Builder.hasGeneratedNode); 1730b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1731b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Dispatch to transfer function logic to handle the call itself. 1732b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const Expr* Callee = CE->getCallee()->IgnoreParens(); 1733b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek const GRState* state = Eng.GetState(Pred); 1734b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek SVal L = state->getSVal(Callee); 1735b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek Eng.getTF().evalCall(Dst, Eng, Builder, CE, L, Pred); 1736b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek 1737b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // Handle the case where no nodes where generated. Auto-generate that 1738b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek // contains the updated state if we aren't generating sinks. 1739b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek if (!Builder.BuildSinks && Dst.size() == oldSize && 1740b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek !Builder.hasGeneratedNode) 1741b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek Eng.MakeNode(Dst, CE, Pred, state); 1742935ef90f4b065c7c865ee5b2a99c5f9b1a115d72Zhongxing Xu } 1743eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis }; 1744eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis 1745eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // Finally, evaluate the function call. We try each of the checkers 1746eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // to see if the can evaluate the function call. 1747b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek ExplodedNodeSet dstCallEvaluated; 1748eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis DefaultEval defEval(*this, CE); 1749b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek getCheckerManager().runCheckersForEvalCall(dstCallEvaluated, 1750b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek dstPreVisit, 1751b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek CE, *this, &defEval); 1752b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 17533cead901aab394fe8e84953235959ece8002854fTed Kremenek // Finally, perform the post-condition check of the CallExpr and store 17543cead901aab394fe8e84953235959ece8002854fTed Kremenek // the created nodes in 'Dst'. 1755b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek getCheckerManager().runCheckersForPostStmt(dst, dstCallEvaluated, CE, 1756b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek *this); 1757e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek} 1758e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 1759e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 176014429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis// Transfer function: Objective-C dot-syntax to access a property. 176114429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis//===----------------------------------------------------------------------===// 176214429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 176314429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidisvoid ExprEngine::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *Ex, 176414429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNode *Pred, 176514429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNodeSet &Dst) { 176614429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNodeSet dstBase; 17679319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis 17689319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis // Visit the receiver (if any). 17699319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis if (Ex->isObjectReceiver()) 17709319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis Visit(Ex->getBase(), Pred, dstBase); 17719319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis else 17729319b56154cfd9e3c781e54d2ee1c10c5858efedArgyrios Kyrtzidis dstBase = Pred; 177314429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 177414429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNodeSet dstPropRef; 177514429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 177614429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis // Using the base, compute the lvalue of the instance variable. 177714429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis for (ExplodedNodeSet::iterator I = dstBase.begin(), E = dstBase.end(); 177814429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis I!=E; ++I) { 177914429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis ExplodedNode *nodeBase = *I; 178014429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis const GRState *state = GetState(nodeBase); 178114429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis MakeNode(dstPropRef, Ex, *I, state->BindExpr(Ex, loc::ObjCPropRef(Ex))); 178214429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis } 178314429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 178414429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis Dst.insert(dstPropRef); 178514429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis} 178614429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 178714429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis//===----------------------------------------------------------------------===// 178897ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek// Transfer function: Objective-C ivar references. 178997ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek//===----------------------------------------------------------------------===// 179048af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek 1791f5cae63463cdb325a0bed146595607cba6da1ebcTed Kremenekstatic std::pair<const void*,const void*> EagerlyAssumeTag 1792a5fdd9ce694b1c2dbfd225cb6f55ef743d1ab562Douglas Gregor = std::pair<const void*,const void*>(&EagerlyAssumeTag,static_cast<void*>(0)); 1793f5cae63463cdb325a0bed146595607cba6da1ebcTed Kremenek 1794d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::evalEagerlyAssume(ExplodedNodeSet &Dst, ExplodedNodeSet &Src, 179503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr *Ex) { 1796031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I=Src.begin(), E=Src.end(); I!=E; ++I) { 1797031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode *Pred = *I; 17981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1799b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek // Test if the previous node was as the same expression. This can happen 1800b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek // when the expression fails to evaluate to anything meaningful and 1801b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek // (as an optimization) we don't generate a node. 18021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ProgramPoint P = Pred->getLocation(); 1803b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek if (!isa<PostStmt>(P) || cast<PostStmt>(P).getStmt() != Ex) { 18041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Dst.Add(Pred); 1805b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek continue; 18061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 1807b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek 180859fea60cc3dde7a14eeafab9469cb911023fdd7fZhongxing Xu const GRState* state = GetState(Pred); 18091397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getSVal(Ex); 18105b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek if (nonloc::SymExprVal *SEV = dyn_cast<nonloc::SymExprVal>(&V)) { 181148af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek // First assume that the condition is true. 181228f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *stateTrue = state->assume(*SEV, true)) { 18131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump stateTrue = stateTrue->BindExpr(Ex, 1814c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.makeIntVal(1U, Ex->getType())); 18151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Dst.Add(Builder->generateNode(PostStmtCustom(Ex, 181625e695b2d574d919cc1bbddf3a2efe073d449b1cZhongxing Xu &EagerlyAssumeTag, Pred->getLocationContext()), 181748af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek stateTrue, Pred)); 181848af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 18191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 182048af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek // Next, assume that the condition is false. 182128f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (const GRState *stateFalse = state->assume(*SEV, false)) { 18221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump stateFalse = stateFalse->BindExpr(Ex, 1823c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.makeIntVal(0U, Ex->getType())); 182425e695b2d574d919cc1bbddf3a2efe073d449b1cZhongxing Xu Dst.Add(Builder->generateNode(PostStmtCustom(Ex, &EagerlyAssumeTag, 182525e695b2d574d919cc1bbddf3a2efe073d449b1cZhongxing Xu Pred->getLocationContext()), 182648af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek stateFalse, Pred)); 182748af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 182848af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 182948af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek else 183048af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek Dst.Add(Pred); 183148af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 183248af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek} 183348af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek 183448af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek//===----------------------------------------------------------------------===// 18354beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek// Transfer function: Objective-C @synchronized. 18364beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek//===----------------------------------------------------------------------===// 18374beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 1838d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitObjCAtSynchronizedStmt(const ObjCAtSynchronizedStmt *S, 18394beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek ExplodedNode *Pred, 18404beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek ExplodedNodeSet &Dst) { 18414beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 18424beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek // The mutex expression is a CFGElement, so we don't need to explicitly 18434beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek // visit it since it will already be processed. 18444beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 18454beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek // Pre-visit the ObjCAtSynchronizedStmt. 18464beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek ExplodedNodeSet Tmp; 18474beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek Tmp.Add(Pred); 1848eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(Dst, Tmp, S, *this); 18494beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek} 18504beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 18514beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek//===----------------------------------------------------------------------===// 185248af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek// Transfer function: Objective-C ivar references. 185348af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek//===----------------------------------------------------------------------===// 185497ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek 1855d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitLvalObjCIvarRefExpr(const ObjCIvarRefExpr* Ex, 1856d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNode* Pred, 1857d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNodeSet& Dst) { 18581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1859892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // Visit the base expression, which is needed for computing the lvalue 1860892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // of the ivar. 1861892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet dstBase; 1862892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const Expr *baseExpr = Ex->getBase(); 1863892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(baseExpr, Pred, dstBase); 18641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18656547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis ExplodedNodeSet dstIvar; 18666547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis 1867892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // Using the base, compute the lvalue of the instance variable. 1868892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek for (ExplodedNodeSet::iterator I = dstBase.begin(), E = dstBase.end(); 1869892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek I!=E; ++I) { 1870892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNode *nodeBase = *I; 1871892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const GRState *state = GetState(nodeBase); 1872892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal baseVal = state->getSVal(baseExpr); 1873892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal location = state->getLValue(Ex->getDecl(), baseVal); 18746547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis MakeNode(dstIvar, Ex, *I, state->BindExpr(Ex, location)); 187597ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek } 18766547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis 18776547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis // Perform the post-condition check of the ObjCIvarRefExpr and store 18786547884b9c20096594bdc652669df82c322c5eb6Argyrios Kyrtzidis // the created nodes in 'Dst'. 1879eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPostStmt(Dst, dstIvar, Ex, *this); 188097ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek} 188197ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek 188297ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek//===----------------------------------------------------------------------===// 1883af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek// Transfer function: Objective-C fast enumeration 'for' statements. 1884af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek//===----------------------------------------------------------------------===// 1885af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek 1886d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitObjCForCollectionStmt(const ObjCForCollectionStmt* S, 1887b317f8f5ca8737a5bbad97a3f7566a2dbd2ed61bZhongxing Xu ExplodedNode* Pred, ExplodedNodeSet& Dst) { 18881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1889af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // ObjCForCollectionStmts are processed in two places. This method 1890af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // handles the case where an ObjCForCollectionStmt* occurs as one of the 1891af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // statements within a basic block. This transfer function does two things: 1892af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // 1893af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // (1) binds the next container value to 'element'. This creates a new 1894af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // node in the ExplodedGraph. 1895af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // 1896af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // (2) binds the value 0/1 to the ObjCForCollectionStmt* itself, indicating 1897af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // whether or not the container has any more elements. This value 1898af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // will be tested in ProcessBranch. We need to explicitly bind 1899af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // this value because a container can contain nil elements. 19001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // 1901af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // FIXME: Eventually this logic should actually do dispatches to 1902af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // 'countByEnumeratingWithState:objects:count:' (NSFastEnumeration). 1903af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // This will require simulating a temporary NSFastEnumerationState, either 1904af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // through an SVal or through the use of MemRegions. This value can 1905af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // be affixed to the ObjCForCollectionStmt* instead of 0/1; when the loop 1906af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // terminates we reclaim the temporary (it goes out of scope) and we 1907af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // we can test if the SVal is 0 or if the MemRegion is null (depending 1908af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // on what approach we take). 1909af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // 1910af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // For now: simulate (1) by assigning either a symbol or nil if the 1911af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // container is empty. Thus this transfer function will by default 1912af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek // result in state splitting. 19131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 191403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Stmt* elem = S->getElement(); 191506fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek SVal ElementV; 19161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 191703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const DeclStmt* DS = dyn_cast<DeclStmt>(elem)) { 191803509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const VarDecl* ElemD = cast<VarDecl>(DS->getSingleDecl()); 1919af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek assert (ElemD->getInit() == 0); 1920d17da2b99f323fa91b01e1dd119cc32e0ee8197dTed Kremenek ElementV = GetState(Pred)->getLValue(ElemD, Pred->getLocationContext()); 192106fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek VisitObjCForCollectionStmtAux(S, Pred, Dst, ElementV); 192206fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek return; 1923af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek } 192406fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 1925031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 1926892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(cast<Expr>(elem), Pred, Tmp); 1927031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I = Tmp.begin(), E = Tmp.end(); I!=E; ++I) { 192806fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek const GRState* state = GetState(*I); 19291397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek VisitObjCForCollectionStmtAux(S, *I, Dst, state->getSVal(elem)); 193006fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek } 193106fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek} 193206fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 1933d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitObjCForCollectionStmtAux(const ObjCForCollectionStmt* S, 1934b317f8f5ca8737a5bbad97a3f7566a2dbd2ed61bZhongxing Xu ExplodedNode* Pred, ExplodedNodeSet& Dst, 193506fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek SVal ElementV) { 193606fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 1937b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // Check if the location we are writing back to is a null pointer. 193803509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Stmt* elem = S->getElement(); 1939b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ExplodedNodeSet Tmp; 19409c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLocation(Tmp, elem, Pred, GetState(Pred), ElementV, NULL, false); 1941b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1942b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (Tmp.empty()) 194306fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek return; 1944b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1945b4b817d704287836b52b34369009e682f208aa2bTed Kremenek for (ExplodedNodeSet::iterator NI=Tmp.begin(), NE=Tmp.end(); NI!=NE; ++NI) { 1946b4b817d704287836b52b34369009e682f208aa2bTed Kremenek Pred = *NI; 1947b4b817d704287836b52b34369009e682f208aa2bTed Kremenek const GRState *state = GetState(Pred); 1948b4b817d704287836b52b34369009e682f208aa2bTed Kremenek 1949b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // Handle the case where the container still has elements. 1950c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal TrueV = svalBuilder.makeTruthVal(1); 1951b4b817d704287836b52b34369009e682f208aa2bTed Kremenek const GRState *hasElems = state->BindExpr(S, TrueV); 1952b4b817d704287836b52b34369009e682f208aa2bTed Kremenek 1953b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // Handle the case where the container has no elements. 1954c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal FalseV = svalBuilder.makeTruthVal(0); 1955b4b817d704287836b52b34369009e682f208aa2bTed Kremenek const GRState *noElems = state->BindExpr(S, FalseV); 1956b4b817d704287836b52b34369009e682f208aa2bTed Kremenek 1957b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (loc::MemRegionVal* MV = dyn_cast<loc::MemRegionVal>(&ElementV)) 1958b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (const TypedRegion* R = dyn_cast<TypedRegion>(MV->getRegion())) { 1959b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // FIXME: The proper thing to do is to really iterate over the 1960b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // container. We will do this with dispatch logic to the store. 1961b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // For now, just 'conjure' up a symbolic value. 1962018220c343c103b7dfaa117a7a474c7a7fd6d068Zhongxing Xu QualType T = R->getValueType(); 19637dfc9420babe83e236a47e752f8723bd06070d9dZhanyong Wan assert(Loc::isLocType(T)); 1964b4b817d704287836b52b34369009e682f208aa2bTed Kremenek unsigned Count = Builder->getCurrentBlockCount(); 1965b4b817d704287836b52b34369009e682f208aa2bTed Kremenek SymbolRef Sym = SymMgr.getConjuredSymbol(elem, T, Count); 1966c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.makeLoc(Sym); 1967b4b817d704287836b52b34369009e682f208aa2bTed Kremenek hasElems = hasElems->bindLoc(ElementV, V); 1968b4b817d704287836b52b34369009e682f208aa2bTed Kremenek 1969b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // Bind the location to 'nil' on the false branch. 1970c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal nilV = svalBuilder.makeIntVal(0, T); 1971b4b817d704287836b52b34369009e682f208aa2bTed Kremenek noElems = noElems->bindLoc(ElementV, nilV); 1972b4b817d704287836b52b34369009e682f208aa2bTed Kremenek } 19731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1974b4b817d704287836b52b34369009e682f208aa2bTed Kremenek // Create the new nodes. 1975b4b817d704287836b52b34369009e682f208aa2bTed Kremenek MakeNode(Dst, S, Pred, hasElems); 1976b4b817d704287836b52b34369009e682f208aa2bTed Kremenek MakeNode(Dst, S, Pred, noElems); 1977b4b817d704287836b52b34369009e682f208aa2bTed Kremenek } 1978af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek} 1979af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek 1980af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek//===----------------------------------------------------------------------===// 1981e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Transfer function: Objective-C message expressions. 1982e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1983e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 1984b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremeneknamespace { 1985b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenekclass ObjCMsgWLItem { 1986b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenekpublic: 198703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ObjCMessageExpr::const_arg_iterator I; 1988b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNode *N; 1989b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 199003509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ObjCMsgWLItem(const ObjCMessageExpr::const_arg_iterator &i, ExplodedNode *n) 1991b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek : I(i), N(n) {} 1992b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek}; 1993b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek} // end anonymous namespace 1994b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1995d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitObjCMessageExpr(const ObjCMessageExpr* ME, 199603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ExplodedNode* Pred, 1997892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet& Dst){ 19981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1999b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Create a worklist to process both the arguments. 20005f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<ObjCMsgWLItem, 20> WL; 2001e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 2002b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // But first evaluate the receiver (if any). 200303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ObjCMessageExpr::const_arg_iterator AI = ME->arg_begin(), AE = ME->arg_end(); 200403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const Expr *Receiver = ME->getInstanceReceiver()) { 2005b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNodeSet Tmp; 2006b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek Visit(Receiver, Pred, Tmp); 20071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2008b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek if (Tmp.empty()) 2009b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek return; 20101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2011b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) 2012b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek WL.push_back(ObjCMsgWLItem(AI, *I)); 2013b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek } 2014b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek else 2015b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek WL.push_back(ObjCMsgWLItem(AI, Pred)); 20161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2017b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Evaluate the arguments. 2018b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNodeSet ArgsEvaluated; 2019b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek while (!WL.empty()) { 2020b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ObjCMsgWLItem Item = WL.back(); 2021b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek WL.pop_back(); 20221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2023b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek if (Item.I == AE) { 2024b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ArgsEvaluated.insert(Item.N); 2025b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek continue; 2026e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 20271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2028b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Evaluate the subexpression. 2029b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNodeSet Tmp; 20301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2031b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // FIXME: [Objective-C++] handle arguments that are references 2032b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek Visit(*Item.I, Item.N, Tmp); 20331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2034b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Enqueue evaluating the next argument on the worklist. 2035b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ++(Item.I); 2036b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek for (ExplodedNodeSet::iterator NI=Tmp.begin(), NE=Tmp.end(); NI!=NE; ++NI) 2037b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek WL.push_back(ObjCMsgWLItem(Item.I, *NI)); 2038b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek } 2039e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 20405286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis // Now that the arguments are processed, handle the ObjC message. 20415286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis VisitObjCMessage(ME, ArgsEvaluated, Dst); 20425286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis} 20435286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis 20445286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidisvoid ExprEngine::VisitObjCMessage(const ObjCMessage &msg, 20455286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis ExplodedNodeSet &Src, ExplodedNodeSet& Dst) { 20465286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis 20475286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis // Handle the previsits checks. 2048b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNodeSet DstPrevisit; 2049eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreObjCMessage(DstPrevisit, Src, msg,*this); 20501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2051b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Proceed with evaluate the message expression. 20529c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek ExplodedNodeSet dstEval; 20531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2054b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek for (ExplodedNodeSet::iterator DI = DstPrevisit.begin(), 2055b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek DE = DstPrevisit.end(); DI != DE; ++DI) { 205638ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek 20575286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis ExplodedNode *Pred = *DI; 2058c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek bool RaisesException = false; 20599c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek unsigned oldSize = dstEval.size(); 206038ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek SaveAndRestore<bool> OldSink(Builder->BuildSinks); 2061b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek SaveOr OldHasGen(Builder->hasGeneratedNode); 20621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20635286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis if (const Expr *Receiver = msg.getInstanceReceiver()) { 206459fea60cc3dde7a14eeafab9469cb911023fdd7fZhongxing Xu const GRState *state = GetState(Pred); 20652b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis SVal recVal = state->getSVal(Receiver); 20662b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis if (!recVal.isUndef()) { 20672b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // Bifurcate the state into nil and non-nil ones. 20682b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis DefinedOrUnknownSVal receiverVal = cast<DefinedOrUnknownSVal>(recVal); 20692b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis 20702b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis const GRState *notNilState, *nilState; 20712b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis llvm::tie(notNilState, nilState) = state->assume(receiverVal); 20722b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis 20732b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // There are three cases: can be nil or non-nil, must be nil, must be 2074eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // non-nil. We ignore must be nil, and merge the rest two into non-nil. 20752b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis if (nilState && !notNilState) { 2076eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis dstEval.insert(Pred); 20772b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis continue; 20782b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis } 20792b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis 20802b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // Check if the "raise" message was sent. 20812b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis assert(notNilState); 20822b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis if (msg.getSelector() == RaiseSel) 20832b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis RaisesException = true; 20842b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis 20852b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // Check if we raise an exception. For now treat these as sinks. 20862b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // Eventually we will want to handle exceptions properly. 20872b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis if (RaisesException) 20882b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis Builder->BuildSinks = true; 20892b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis 20902b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis // Dispatch to plug-in transfer function. 20912b3ca9c420e90f131642d7e7d47af6387dad7e1dArgyrios Kyrtzidis evalObjCMessage(dstEval, msg, Pred, notNilState); 2092a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu } 209321fe8370f660a30e3a0493c74728dcb369b9c58bTed Kremenek } 20945286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis else if (const ObjCInterfaceDecl *Iface = msg.getReceiverInterface()) { 209504badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor IdentifierInfo* ClsName = Iface->getIdentifier(); 20965286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis Selector S = msg.getSelector(); 20971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2098c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek // Check for special instance methods. 2099c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek if (!NSExceptionII) { 2100c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek ASTContext& Ctx = getContext(); 2101c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek NSExceptionII = &Ctx.Idents.get("NSException"); 2102c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek } 21031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2104c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek if (ClsName == NSExceptionII) { 2105c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek enum { NUM_RAISE_SELECTORS = 2 }; 21061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2107c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek // Lazily create a cache of the selectors. 2108c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek if (!NSExceptionInstanceRaiseSelectors) { 2109c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek ASTContext& Ctx = getContext(); 2110b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek NSExceptionInstanceRaiseSelectors = 2111b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek new Selector[NUM_RAISE_SELECTORS]; 21125f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<IdentifierInfo*, NUM_RAISE_SELECTORS> II; 2113c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek unsigned idx = 0; 21141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2115c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek // raise:format: 2116c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek II.push_back(&Ctx.Idents.get("raise")); 2117c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek II.push_back(&Ctx.Idents.get("format")); 2118c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek NSExceptionInstanceRaiseSelectors[idx++] = 2119c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek Ctx.Selectors.getSelector(II.size(), &II[0]); 21201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2121c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek // raise:format::arguments: 2122c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek II.push_back(&Ctx.Idents.get("arguments")); 2123c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek NSExceptionInstanceRaiseSelectors[idx++] = 2124c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek Ctx.Selectors.getSelector(II.size(), &II[0]); 2125c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek } 21261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2127c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek for (unsigned i = 0; i < NUM_RAISE_SELECTORS; ++i) 2128c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek if (S == NSExceptionInstanceRaiseSelectors[i]) { 212938ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek RaisesException = true; 213038ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek break; 2131c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek } 2132e448ab4f9dd162802f5d7cfea60f7830cc61c654Ted Kremenek } 21331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2134a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu // Check if we raise an exception. For now treat these as sinks. 2135a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu // Eventually we will want to handle exceptions properly. 2136a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu if (RaisesException) 2137a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu Builder->BuildSinks = true; 21381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2139a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu // Dispatch to plug-in transfer function. 21405286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis evalObjCMessage(dstEval, msg, Pred, Builder->GetState(Pred)); 2141a46e4d91d8f3eb341f2387768db66dcfe8dd0afaZhongxing Xu } 2142b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 214338ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek // Handle the case where no nodes where generated. Auto-generate that 214438ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek // contains the updated state if we aren't generating sinks. 21459c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek if (!Builder->BuildSinks && dstEval.size() == oldSize && 2146b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek !Builder->hasGeneratedNode) 21475286e2ddfd8332520de4c076e49991d6fe557adbArgyrios Kyrtzidis MakeNode(dstEval, msg.getOriginExpr(), Pred, GetState(Pred)); 2148c79d7d49c5ec42e8bb6ac34350ebb5bc24ca663dTed Kremenek } 21491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 215038ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek // Finally, perform the post-condition check of the ObjCMessageExpr and store 215138ac4f504bf8ed514520b5a82be538bdb0860687Ted Kremenek // the created nodes in 'Dst'. 2152eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPostObjCMessage(Dst, dstEval, msg, *this); 2153de43424560f1a744de6214dab6bbee28ad8437f5Ted Kremenek} 2154de43424560f1a744de6214dab6bbee28ad8437f5Ted Kremenek 2155e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 2156e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Transfer functions: Miscellaneous statements. 2157e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 2158e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 2159d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitCast(const CastExpr *CastE, const Expr *Ex, 2160d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNode *Pred, ExplodedNodeSet &Dst) { 2161892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek 2162031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet S1; 2163892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(Ex, Pred, S1); 2164892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet S2; 2165eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(S2, S1, CastE, *this); 2166892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek 216714429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis if (CastE->getCastKind() == CK_LValueToRValue || 216814429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis CastE->getCastKind() == CK_GetObjCProperty) { 2169892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek for (ExplodedNodeSet::iterator I = S2.begin(), E = S2.end(); I!=E; ++I) { 2170892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNode *subExprNode = *I; 2171892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const GRState *state = GetState(subExprNode); 2172892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek evalLoad(Dst, CastE, subExprNode, state, state->getSVal(Ex)); 2173892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 2174892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek return; 2175892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 2176892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek 2177892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // All other casts. 21785d3003a9d10cc6da4ef716c350bf53c187774c93Ted Kremenek QualType T = CastE->getType(); 2179933c3e1dca3bb88bf113290ef0ade8f5262a89c0Zhongxing Xu QualType ExTy = Ex->getType(); 2180ed340f7d26b3a8fedeb2aebeb5b23429e79d18e0Zhongxing Xu 2181d3118bd7daed36417c8e8bdb0390495a4c829d86Zhongxing Xu if (const ExplicitCastExpr *ExCast=dyn_cast_or_null<ExplicitCastExpr>(CastE)) 218249badde06e066d058d6c7fcf4e628a72999b65a9Douglas Gregor T = ExCast->getTypeAsWritten(); 2183b79b117d3b76da58b14ef835ccfcf2e988b7345fZhongxing Xu 218494ae8fd470471134114599ccfc2301da05719212Ted Kremenek for (ExplodedNodeSet::iterator I = S2.begin(), E = S2.end(); I != E; ++I) { 218594ae8fd470471134114599ccfc2301da05719212Ted Kremenek Pred = *I; 21864fd56816e0925c04f2c92e75399f5c9018d5d6fbZhongxing Xu 218794ae8fd470471134114599ccfc2301da05719212Ted Kremenek switch (CastE->getCastKind()) { 2188f85e193739c953358c865005855253af4f68a497John McCall case CK_LValueToRValue: 2189f85e193739c953358c865005855253af4f68a497John McCall assert(false && "LValueToRValue casts handled earlier."); 2190f85e193739c953358c865005855253af4f68a497John McCall case CK_GetObjCProperty: 2191f85e193739c953358c865005855253af4f68a497John McCall assert(false && "GetObjCProperty casts handled earlier."); 219294ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_ToVoid: 219394ae8fd470471134114599ccfc2301da05719212Ted Kremenek Dst.Add(Pred); 219494ae8fd470471134114599ccfc2301da05719212Ted Kremenek continue; 2195f85e193739c953358c865005855253af4f68a497John McCall // The analyzer doesn't do anything special with these casts, 2196f85e193739c953358c865005855253af4f68a497John McCall // since it understands retain/release semantics already. 2197f85e193739c953358c865005855253af4f68a497John McCall case CK_ObjCProduceObject: 21987e5e5f4cc36fe50f46ad76dca7a266434c94f475John McCall case CK_ObjCConsumeObject: 21997e5e5f4cc36fe50f46ad76dca7a266434c94f475John McCall case CK_ObjCReclaimReturnedObject: // Fall-through. 2200f85e193739c953358c865005855253af4f68a497John McCall // True no-ops. 220194ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_NoOp: 220294ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FunctionToPointerDecay: { 220394ae8fd470471134114599ccfc2301da05719212Ted Kremenek // Copy the SVal of Ex to CastE. 220494ae8fd470471134114599ccfc2301da05719212Ted Kremenek const GRState *state = GetState(Pred); 220594ae8fd470471134114599ccfc2301da05719212Ted Kremenek SVal V = state->getSVal(Ex); 220694ae8fd470471134114599ccfc2301da05719212Ted Kremenek state = state->BindExpr(CastE, V); 220794ae8fd470471134114599ccfc2301da05719212Ted Kremenek MakeNode(Dst, CastE, Pred, state); 220894ae8fd470471134114599ccfc2301da05719212Ted Kremenek continue; 220994ae8fd470471134114599ccfc2301da05719212Ted Kremenek } 221094ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_Dependent: 221194ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_ArrayToPointerDecay: 221294ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_BitCast: 221394ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_LValueBitCast: 221494ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralCast: 221594ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_NullToPointer: 221694ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralToPointer: 221794ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_PointerToIntegral: 221894ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_PointerToBoolean: 221994ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralToBoolean: 222094ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralToFloating: 222194ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingToIntegral: 222294ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingToBoolean: 222394ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingCast: 222494ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingRealToComplex: 222594ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingComplexToReal: 222694ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingComplexToBoolean: 222794ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingComplexCast: 222894ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_FloatingComplexToIntegralComplex: 222994ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralRealToComplex: 223094ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralComplexToReal: 223194ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralComplexToBoolean: 223294ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralComplexCast: 223394ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_IntegralComplexToFloatingComplex: 223494ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_AnyPointerToObjCPointerCast: 223594ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_AnyPointerToBlockPointerCast: 223694ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_ObjCObjectLValueCast: { 223794ae8fd470471134114599ccfc2301da05719212Ted Kremenek // Delegate to SValBuilder to process. 223894ae8fd470471134114599ccfc2301da05719212Ted Kremenek const GRState* state = GetState(Pred); 223994ae8fd470471134114599ccfc2301da05719212Ted Kremenek SVal V = state->getSVal(Ex); 224094ae8fd470471134114599ccfc2301da05719212Ted Kremenek V = svalBuilder.evalCast(V, T, ExTy); 224194ae8fd470471134114599ccfc2301da05719212Ted Kremenek state = state->BindExpr(CastE, V); 224294ae8fd470471134114599ccfc2301da05719212Ted Kremenek MakeNode(Dst, CastE, Pred, state); 224394ae8fd470471134114599ccfc2301da05719212Ted Kremenek continue; 224494ae8fd470471134114599ccfc2301da05719212Ted Kremenek } 224594ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_DerivedToBase: 224694ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_UncheckedDerivedToBase: { 224794ae8fd470471134114599ccfc2301da05719212Ted Kremenek // For DerivedToBase cast, delegate to the store manager. 224894ae8fd470471134114599ccfc2301da05719212Ted Kremenek const GRState *state = GetState(Pred); 224994ae8fd470471134114599ccfc2301da05719212Ted Kremenek SVal val = state->getSVal(Ex); 225094ae8fd470471134114599ccfc2301da05719212Ted Kremenek val = getStoreManager().evalDerivedToBase(val, T); 225194ae8fd470471134114599ccfc2301da05719212Ted Kremenek state = state->BindExpr(CastE, val); 225294ae8fd470471134114599ccfc2301da05719212Ted Kremenek MakeNode(Dst, CastE, Pred, state); 225394ae8fd470471134114599ccfc2301da05719212Ted Kremenek continue; 225494ae8fd470471134114599ccfc2301da05719212Ted Kremenek } 225594ae8fd470471134114599ccfc2301da05719212Ted Kremenek // Various C++ casts that are not handled yet. 22561de4d4e8cb2e9c88809fea8092bc6e835a5473d2John McCall case CK_Dynamic: 225794ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_ToUnion: 225894ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_BaseToDerived: 225994ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_NullToMemberPointer: 226094ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_BaseToDerivedMemberPointer: 226194ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_DerivedToBaseMemberPointer: 226294ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_UserDefinedConversion: 226394ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_ConstructorConversion: 226494ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_VectorSplat: 226594ae8fd470471134114599ccfc2301da05719212Ted Kremenek case CK_MemberPointerToBoolean: { 226694ae8fd470471134114599ccfc2301da05719212Ted Kremenek // Recover some path-sensitivty by conjuring a new value. 226794ae8fd470471134114599ccfc2301da05719212Ted Kremenek QualType resultType = CastE->getType(); 226894ae8fd470471134114599ccfc2301da05719212Ted Kremenek if (CastE->isLValue()) 226994ae8fd470471134114599ccfc2301da05719212Ted Kremenek resultType = getContext().getPointerType(resultType); 227094ae8fd470471134114599ccfc2301da05719212Ted Kremenek 227194ae8fd470471134114599ccfc2301da05719212Ted Kremenek SVal result = 227294ae8fd470471134114599ccfc2301da05719212Ted Kremenek svalBuilder.getConjuredSymbolVal(NULL, CastE, resultType, 227394ae8fd470471134114599ccfc2301da05719212Ted Kremenek Builder->getCurrentBlockCount()); 227494ae8fd470471134114599ccfc2301da05719212Ted Kremenek 227594ae8fd470471134114599ccfc2301da05719212Ted Kremenek const GRState *state = GetState(Pred)->BindExpr(CastE, result); 227694ae8fd470471134114599ccfc2301da05719212Ted Kremenek MakeNode(Dst, CastE, Pred, state); 227794ae8fd470471134114599ccfc2301da05719212Ted Kremenek continue; 227894ae8fd470471134114599ccfc2301da05719212Ted Kremenek } 22794fd56816e0925c04f2c92e75399f5c9018d5d6fbZhongxing Xu } 2280874d63fc63387365a21775a14c01963b10fde689Ted Kremenek } 22819de04c4415bd31c0c0e888e9ad5673f6c972e12eTed Kremenek} 22829de04c4415bd31c0c0e888e9ad5673f6c972e12eTed Kremenek 2283d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitCompoundLiteralExpr(const CompoundLiteralExpr* CL, 22841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ExplodedNode* Pred, 2285892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet& Dst) { 228603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const InitListExpr* ILE 228703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu = cast<InitListExpr>(CL->getInitializer()->IgnoreParens()); 2288031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 22894f09027385466f1f4c382c80ca77157e2aef97d9Ted Kremenek Visit(ILE, Pred, Tmp); 22901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2291031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I = Tmp.begin(), EI = Tmp.end(); I!=EI; ++I) { 2292a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 22931397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal ILV = state->getSVal(ILE); 229467d1287035767f4f6c8ca0c2bb755990012a44caTed Kremenek const LocationContext *LC = (*I)->getLocationContext(); 229567d1287035767f4f6c8ca0c2bb755990012a44caTed Kremenek state = state->bindCompoundLiteral(CL, LC, ILV); 22964f09027385466f1f4c382c80ca77157e2aef97d9Ted Kremenek 2297892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (CL->isLValue()) { 229867d1287035767f4f6c8ca0c2bb755990012a44caTed Kremenek MakeNode(Dst, CL, *I, state->BindExpr(CL, state->getLValue(CL, LC))); 229967d1287035767f4f6c8ca0c2bb755990012a44caTed Kremenek } 2300f22679e3e5d5f5754931952e58112b4c863a4137Zhongxing Xu else 23018e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, CL, *I, state->BindExpr(CL, ILV)); 23024f09027385466f1f4c382c80ca77157e2aef97d9Ted Kremenek } 23034f09027385466f1f4c382c80ca77157e2aef97d9Ted Kremenek} 23044f09027385466f1f4c382c80ca77157e2aef97d9Ted Kremenek 2305d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitDeclStmt(const DeclStmt *DS, ExplodedNode *Pred, 23061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ExplodedNodeSet& Dst) { 23075b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek 23081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // The CFG has one DeclStmt per Decl. 230903509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Decl* D = *DS->decl_begin(); 23101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2311e6c62e3d43728b0a4477fffd543723dd2170af1aTed Kremenek if (!D || !isa<VarDecl>(D)) 23125b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek return; 23131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 23141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const VarDecl* VD = dyn_cast<VarDecl>(D); 23151f19124c70093d2ef0c06eed63ca6080611800a3Zhongxing Xu const Expr* InitEx = VD->getInit(); 23165b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek 23175b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek // FIXME: static variables may have an initializer, but the second 23185b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek // time a function is called those values may not be current. 2319031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 23205b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek 232103e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor if (InitEx) 232203e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor Visit(InitEx, Pred, Tmp); 232303e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor else 2324e6c62e3d43728b0a4477fffd543723dd2170af1aTed Kremenek Tmp.Add(Pred); 23251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2326ae1623345aed43dcd2e069970a00618378a37b34Ted Kremenek ExplodedNodeSet Tmp2; 2327eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(Tmp2, Tmp, DS, *this); 2328b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 2329ae1623345aed43dcd2e069970a00618378a37b34Ted Kremenek for (ExplodedNodeSet::iterator I=Tmp2.begin(), E=Tmp2.end(); I!=E; ++I) { 23305206f0b913d1a11744c9436c83b24f8daa21152cZhongxing Xu ExplodedNode *N = *I; 2331ae1623345aed43dcd2e069970a00618378a37b34Ted Kremenek const GRState *state = GetState(N); 23321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 23335b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek // Decls without InitExpr are not initialized explicitly. 23345206f0b913d1a11744c9436c83b24f8daa21152cZhongxing Xu const LocationContext *LC = N->getLocationContext(); 2335d17da2b99f323fa91b01e1dd119cc32e0ee8197dTed Kremenek 23365b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek if (InitEx) { 23371397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal InitVal = state->getSVal(InitEx); 23381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 233905e539175d9bac678fca8e77665e88b685729850Zhongxing Xu // We bound the temp obj region to the CXXConstructExpr. Now recover 234005e539175d9bac678fca8e77665e88b685729850Zhongxing Xu // the lazy compound value when the variable is not a reference. 234105e539175d9bac678fca8e77665e88b685729850Zhongxing Xu if (AMgr.getLangOptions().CPlusPlus && VD->getType()->isRecordType() && 234205e539175d9bac678fca8e77665e88b685729850Zhongxing Xu !VD->getType()->isReferenceType() && isa<loc::MemRegionVal>(InitVal)){ 234305e539175d9bac678fca8e77665e88b685729850Zhongxing Xu InitVal = state->getSVal(cast<loc::MemRegionVal>(InitVal).getRegion()); 234405e539175d9bac678fca8e77665e88b685729850Zhongxing Xu assert(isa<nonloc::LazyCompoundVal>(InitVal)); 234505e539175d9bac678fca8e77665e88b685729850Zhongxing Xu } 234605e539175d9bac678fca8e77665e88b685729850Zhongxing Xu 23475b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek // Recover some path-sensitivity if a scalar value evaluated to 23485b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek // UnknownVal. 2349a804a68f5a1ad739eb17ff2fd942d12abbc30b08Ted Kremenek if ((InitVal.isUnknown() || 2350a804a68f5a1ad739eb17ff2fd942d12abbc30b08Ted Kremenek !getConstraintManager().canReasonAbout(InitVal)) && 2351a804a68f5a1ad739eb17ff2fd942d12abbc30b08Ted Kremenek !VD->getType()->isReferenceType()) { 2352c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek InitVal = svalBuilder.getConjuredSymbolVal(NULL, InitEx, 23535206f0b913d1a11744c9436c83b24f8daa21152cZhongxing Xu Builder->getCurrentBlockCount()); 23541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 2355b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 23569c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalBind(Dst, DS, *I, state, 2357b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek loc::MemRegionVal(state->getRegion(VD, LC)), InitVal, true); 23581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 23595b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek else { 2360f6f56d4fc8ebce17e7b83eb2c35f57a055c22283Ted Kremenek state = state->bindDeclWithNoInit(state->getRegion(VD, LC)); 23615b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek MakeNode(Dst, DS, *I, state); 23625b8d9019e317e3e0abc4ad1d89066908413339aaTed Kremenek } 23635b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek } 23645b7dcce86c79370f16fd89ecebd454a3b4eec73cTed Kremenek} 2365f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek 2366f75b186893b3461610668dbb627d6f95abead973Ted Kremeneknamespace { 2367f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // This class is used by VisitInitListExpr as an item in a worklist 2368f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // for processing the values contained in an InitListExpr. 2369ba5fb5a955c896815c439289fc51c03cf0635129Kovarththanan Rajaratnamclass InitListWLItem { 2370f75b186893b3461610668dbb627d6f95abead973Ted Kremenekpublic: 2371f75b186893b3461610668dbb627d6f95abead973Ted Kremenek llvm::ImmutableList<SVal> Vals; 2372031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode* N; 237303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu InitListExpr::const_reverse_iterator Itr; 23741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2375031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu InitListWLItem(ExplodedNode* n, llvm::ImmutableList<SVal> vals, 237603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu InitListExpr::const_reverse_iterator itr) 2377f75b186893b3461610668dbb627d6f95abead973Ted Kremenek : Vals(vals), N(n), Itr(itr) {} 2378f75b186893b3461610668dbb627d6f95abead973Ted Kremenek}; 2379f75b186893b3461610668dbb627d6f95abead973Ted Kremenek} 2380f75b186893b3461610668dbb627d6f95abead973Ted Kremenek 2381f75b186893b3461610668dbb627d6f95abead973Ted Kremenek 2382d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitInitListExpr(const InitListExpr* E, ExplodedNode* Pred, 2383031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet& Dst) { 2384c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 2385a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek const GRState* state = GetState(Pred); 238676dba7b67a36b2d6311e4ad4714df5dbd39dbebeTed Kremenek QualType T = getContext().getCanonicalType(E->getType()); 23871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned NumInitElements = E->getNumInits(); 2388c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 2389fb87b89fc9eb103e19fb8e4b925c23f0bd091b99Douglas Gregor if (T->isArrayType() || T->isRecordType() || T->isVectorType()) { 2390a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek llvm::ImmutableList<SVal> StartVals = getBasicVals().getEmptySValList(); 23911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2392a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek // Handle base case where the initializer has no elements. 2393a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek // e.g: static int* myArray[] = {}; 2394a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek if (NumInitElements == 0) { 2395c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.makeCompoundVal(T, StartVals); 23968e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, E, Pred, state->BindExpr(E, V)); 2397a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek return; 23981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 23991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2400a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek // Create a worklist to process the initializers. 24015f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<InitListWLItem, 10> WorkList; 24021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump WorkList.reserve(NumInitElements); 24031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump WorkList.push_back(InitListWLItem(Pred, StartVals, E->rbegin())); 240403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu InitListExpr::const_reverse_iterator ItrEnd = E->rend(); 2405cf54959eae25fb3050f41833f0eab91042fb1269Ted Kremenek assert(!(E->rbegin() == E->rend())); 24061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2407a49e3674e44104e34342d2c35ece7cb4f9bd96cbTed Kremenek // Process the worklist until it is empty. 2408f75b186893b3461610668dbb627d6f95abead973Ted Kremenek while (!WorkList.empty()) { 2409f75b186893b3461610668dbb627d6f95abead973Ted Kremenek InitListWLItem X = WorkList.back(); 2410f75b186893b3461610668dbb627d6f95abead973Ted Kremenek WorkList.pop_back(); 24111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2412031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2413f75b186893b3461610668dbb627d6f95abead973Ted Kremenek Visit(*X.Itr, X.N, Tmp); 24141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 241503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu InitListExpr::const_reverse_iterator NewItr = X.Itr + 1; 2416c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 2417bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu for (ExplodedNodeSet::iterator NI=Tmp.begin(),NE=Tmp.end();NI!=NE;++NI) { 2418f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // Get the last initializer value. 2419f75b186893b3461610668dbb627d6f95abead973Ted Kremenek state = GetState(*NI); 24201397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal InitV = state->getSVal(cast<Expr>(*X.Itr)); 24211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2422f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // Construct the new list of values by prepending the new value to 2423f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // the already constructed list. 2424f75b186893b3461610668dbb627d6f95abead973Ted Kremenek llvm::ImmutableList<SVal> NewVals = 2425f75b186893b3461610668dbb627d6f95abead973Ted Kremenek getBasicVals().consVals(InitV, X.Vals); 24261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2427f75b186893b3461610668dbb627d6f95abead973Ted Kremenek if (NewItr == ItrEnd) { 2428a189dcaf0315ce86e76ea1491e739357b6f3f620Zhongxing Xu // Now we have a list holding all init values. Make CompoundValData. 2429c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.makeCompoundVal(T, NewVals); 2430c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 2431f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // Make final state and node. 24328e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, E, *NI, state->BindExpr(E, V)); 2433f75b186893b3461610668dbb627d6f95abead973Ted Kremenek } 2434f75b186893b3461610668dbb627d6f95abead973Ted Kremenek else { 2435f75b186893b3461610668dbb627d6f95abead973Ted Kremenek // Still some initializer values to go. Push them onto the worklist. 2436f75b186893b3461610668dbb627d6f95abead973Ted Kremenek WorkList.push_back(InitListWLItem(*NI, NewVals, NewItr)); 2437f75b186893b3461610668dbb627d6f95abead973Ted Kremenek } 2438f75b186893b3461610668dbb627d6f95abead973Ted Kremenek } 2439f75b186893b3461610668dbb627d6f95abead973Ted Kremenek } 24401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 24418790307d116eef2c23d665ca75d1e44db232117cTed Kremenek return; 2442c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu } 2443c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 24447dfc9420babe83e236a47e752f8723bd06070d9dZhanyong Wan if (Loc::isLocType(T) || T->isIntegerType()) { 2445c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu assert (E->getNumInits() == 1); 2446031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 244703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Init = E->getInit(0); 2448c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu Visit(Init, Pred, Tmp); 2449bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu for (ExplodedNodeSet::iterator I=Tmp.begin(), EI=Tmp.end(); I != EI; ++I) { 2450c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu state = GetState(*I); 24511397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek MakeNode(Dst, E, *I, state->BindExpr(E, state->getSVal(Init))); 2452c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu } 2453c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu return; 2454c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu } 2455c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu 2456c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu assert(0 && "unprocessed InitListExpr type"); 2457c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu} 2458f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek 2459f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne/// VisitUnaryExprOrTypeTraitExpr - Transfer function for sizeof(type). 2460f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbournevoid ExprEngine::VisitUnaryExprOrTypeTraitExpr( 2461f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne const UnaryExprOrTypeTraitExpr* Ex, 2462031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode* Pred, 2463031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet& Dst) { 24640518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType T = Ex->getTypeOfArgument(); 24651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2466f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (Ex->getKind() == UETT_SizeOf) { 2467f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (!T->isIncompleteType() && !T->isConstantSizeType()) { 2468b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose assert(T->isVariableArrayType() && "Unknown non-constant-sized type."); 2469b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 2470b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // FIXME: Add support for VLA type arguments, not just VLA expressions. 2471b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // When that happens, we should probably refactor VLASizeChecker's code. 2472b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose if (Ex->isArgumentType()) { 2473b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose Dst.Add(Pred); 2474b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose return; 2475b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose } 2476b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 2477b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // Get the size by getting the extent of the sub-expression. 2478b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // First, visit the sub-expression to find its region. 247903509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr *Arg = Ex->getArgumentExpr(); 2480b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose ExplodedNodeSet Tmp; 2481892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(Arg, Pred, Tmp); 2482b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 2483b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 2484b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose const GRState* state = GetState(*I); 2485b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose const MemRegion *MR = state->getSVal(Arg).getAsRegion(); 2486b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 2487b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // If the subexpression can't be resolved to a region, we don't know 2488b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // anything about its size. Just leave the state as is and continue. 2489b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose if (!MR) { 2490b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose Dst.Add(*I); 2491b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose continue; 2492b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose } 2493b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 2494b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose // The result is the extent of the VLA. 2495c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal Extent = cast<SubRegion>(MR)->getExtent(svalBuilder); 2496b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose MakeNode(Dst, Ex, *I, state->BindExpr(Ex, Extent)); 2497b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose } 2498b7e3aabf8f0fe4210d6a0aaec8a2b5770cab9186Jordy Rose 249987e8034faf994b1e13143e6e0b5062a38d979d21Ted Kremenek return; 250055f7bcbda37964d3c0e8928d0e50a6e1692b7dceTed Kremenek } 2501c12c5bba6ceb6acd4e51e7a0fc03257da9cfd44eJohn McCall else if (T->getAs<ObjCObjectType>()) { 2502c12c5bba6ceb6acd4e51e7a0fc03257da9cfd44eJohn McCall // Some code tries to take the sizeof an ObjCObjectType, relying that 250355f7bcbda37964d3c0e8928d0e50a6e1692b7dceTed Kremenek // the compiler has laid out its representation. Just report Unknown 25041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // for these. 250561e8e1b84292e882553a47edec830a79606c78f4Ted Kremenek Dst.Add(Pred); 2506f342d1887c9b2ef24d029c0546d536e2277b9976Ted Kremenek return; 250755f7bcbda37964d3c0e8928d0e50a6e1692b7dceTed Kremenek } 250887e8034faf994b1e13143e6e0b5062a38d979d21Ted Kremenek } 2509f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne 2510f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne Expr::EvalResult Result; 2511f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne Ex->Evaluate(Result, getContext()); 2512f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne CharUnits amt = CharUnits::fromQuantity(Result.Val.getInt().getZExtValue()); 25131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25140e561a3e6755c4f248a8bb05d49071ddf4f2ef7bTed Kremenek MakeNode(Dst, Ex, Pred, 2515b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek GetState(Pred)->BindExpr(Ex, 2516c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.makeIntVal(amt.getQuantity(), Ex->getType()))); 2517469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek} 2518469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek 2519d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitOffsetOfExpr(const OffsetOfExpr* OOE, 252003509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ExplodedNode* Pred, ExplodedNodeSet& Dst) { 25218ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Expr::EvalResult Res; 25228ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (OOE->Evaluate(Res, getContext()) && Res.Val.isInt()) { 25238ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const APSInt &IV = Res.Val.getInt(); 25248ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor assert(IV.getBitWidth() == getContext().getTypeSize(OOE->getType())); 25258ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor assert(OOE->getType()->isIntegerType()); 2526575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor assert(IV.isSigned() == OOE->getType()->isSignedIntegerOrEnumerationType()); 2527c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal X = svalBuilder.makeIntVal(IV); 25288ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor MakeNode(Dst, OOE, Pred, GetState(Pred)->BindExpr(OOE, X)); 25298ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return; 25308ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 25318ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor // FIXME: Handle the case where __builtin_offsetof is not a constant. 25328ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Dst.Add(Pred); 25338ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor} 2534d8e9f0dc737133d4e8342f39389064620f5a7f8fTed Kremenek 2535d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitUnaryOperator(const UnaryOperator* U, 253603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu ExplodedNode* Pred, 2537892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet& Dst) { 25381b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 2539d8e9f0dc737133d4e8342f39389064620f5a7f8fTed Kremenek switch (U->getOpcode()) { 25401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2541d8e9f0dc737133d4e8342f39389064620f5a7f8fTed Kremenek default: 2542d8e9f0dc737133d4e8342f39389064620f5a7f8fTed Kremenek break; 25431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25442de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Real: { 254503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = U->getSubExpr()->IgnoreParens(); 2546031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2547b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek Visit(Ex, Pred, Tmp); 25481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2549031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 25501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25511c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu // FIXME: We don't have complex SValues yet. 2552b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek if (Ex->getType()->isAnyComplexType()) { 2553b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek // Just report "Unknown." 2554b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek Dst.Add(*I); 2555b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek continue; 2556b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek } 25571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25582de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall // For all other types, UO_Real is an identity operation. 2559b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek assert (U->getType() == Ex->getType()); 2560a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 25611397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek MakeNode(Dst, U, *I, state->BindExpr(U, state->getSVal(Ex))); 25621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 25631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2564b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek return; 2565b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek } 25661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25672de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Imag: { 25681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 256903509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = U->getSubExpr()->IgnoreParens(); 2570031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2571b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek Visit(Ex, Pred, Tmp); 25721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2573031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 25741c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu // FIXME: We don't have complex SValues yet. 2575b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek if (Ex->getType()->isAnyComplexType()) { 2576b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek // Just report "Unknown." 2577b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek Dst.Add(*I); 2578b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek continue; 2579b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek } 25801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25812de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall // For all other types, UO_Imag returns 0. 2582a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 2583c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal X = svalBuilder.makeZeroVal(Ex->getType()); 25848e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, U, *I, state->BindExpr(U, X)); 2585b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek } 25861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2587b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek return; 2588b8e26e63d9dcc09351d75677721c6c9ff7045b54Ted Kremenek } 25898ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 2590892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek case UO_Plus: 2591892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek assert(!U->isLValue()); 2592892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // FALL-THROUGH. 2593892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek case UO_Deref: 25949c2bac02c1d1204bcf2c5a025ab901d09bc7ae26Zhongxing Xu case UO_AddrOf: 25952de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Extension: { 25961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25971b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Unary "+" is a no-op, similar to a parentheses. We still have places 25981b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // where it may be a block-level expression, so we need to 25991b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // generate an extra node that just propagates the value of the 26001b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // subexpression. 26011b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 260203509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = U->getSubExpr()->IgnoreParens(); 2603031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2604892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(Ex, Pred, Tmp); 26051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 2607a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 26081397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek MakeNode(Dst, U, *I, state->BindExpr(U, state->getSVal(Ex))); 26091b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26111b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek return; 26121b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26142de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_LNot: 26152de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 26162de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Not: { 2617892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek assert (!U->isLValue()); 261803509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = U->getSubExpr()->IgnoreParens(); 2619031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 26201b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek Visit(Ex, Pred, Tmp); 26211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end(); I!=E; ++I) { 2623a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 26241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2625855cd903beadc056ea300464b46c6c46b91d290fTed Kremenek // Get the value of the subexpression. 26261397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getSVal(Ex); 2627855cd903beadc056ea300464b46c6c46b91d290fTed Kremenek 2628e04a5cb9afb5faa205c0bfa93103d6df691e05b2Ted Kremenek if (V.isUnknownOrUndef()) { 26298e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek MakeNode(Dst, U, *I, state->BindExpr(U, V)); 2630e04a5cb9afb5faa205c0bfa93103d6df691e05b2Ted Kremenek continue; 2631e04a5cb9afb5faa205c0bfa93103d6df691e05b2Ted Kremenek } 26321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 263360595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// QualType DstT = getContext().getCanonicalType(U->getType()); 263460595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// QualType SrcT = getContext().getCanonicalType(Ex->getType()); 26351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump// 263660595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// if (DstT != SrcT) // Perform promotions. 26379c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek// V = evalCast(V, DstT); 26381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump// 263960595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// if (V.isUnknownOrUndef()) { 264060595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// MakeNode(Dst, U, *I, BindExpr(St, U, V)); 264160595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// continue; 264260595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek// } 26431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26441b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek switch (U->getOpcode()) { 26451b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek default: 26461b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek assert(false && "Invalid Opcode."); 26471b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek break; 26481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26492de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Not: 265060a6e0ce72a24d6247602625c631fc3dc7bfd8d4Ted Kremenek // FIXME: Do we need to handle promotions? 26519c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek state = state->BindExpr(U, evalComplement(cast<NonLoc>(V))); 26521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump break; 26531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26542de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 265560a6e0ce72a24d6247602625c631fc3dc7bfd8d4Ted Kremenek // FIXME: Do we need to handle promotions? 26569c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek state = state->BindExpr(U, evalMinus(cast<NonLoc>(V))); 26571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump break; 26581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26592de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_LNot: 26601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26611b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // C99 6.5.3.3: "The expression !E is equivalent to (0==E)." 26621b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // 26631b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Note: technically we do "E == 0", but this is the same in the 26641b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // transfer functions as "0 == E". 26656c07bdba93b095b66e2c8c82dd5ed458fa8285eaTed Kremenek SVal Result; 26661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26671c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu if (isa<Loc>(V)) { 2668c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek Loc X = svalBuilder.makeNull(); 26699c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek Result = evalBinOp(state, BO_EQ, cast<Loc>(V), X, 26706c07bdba93b095b66e2c8c82dd5ed458fa8285eaTed Kremenek U->getType()); 26711b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26721b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek else { 267360595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek nonloc::ConcreteInt X(getBasicVals().getValue(0, Ex->getType())); 26749c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek Result = evalBinOp(state, BO_EQ, cast<NonLoc>(V), X, 26756c07bdba93b095b66e2c8c82dd5ed458fa8285eaTed Kremenek U->getType()); 26761b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26788e0293406f9d62a293be6be3b1fb89d359f5ea40Ted Kremenek state = state->BindExpr(U, Result); 26791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26801b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek break; 26811b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2683a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek MakeNode(Dst, U, *I, state); 26841b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26861b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek return; 26871b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 26887b8009a3e3a1479203d315b74712552a4ce3e200Ted Kremenek } 26892ad886836c3a9111f24144a8fe5da3d72958a01cTed Kremenek 26901b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Handle ++ and -- (both pre- and post-increment). 26911b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek assert (U->isIncrementDecrementOp()); 2692031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 269303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr* Ex = U->getSubExpr()->IgnoreParens(); 2694892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(Ex, Pred, Tmp); 26951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2696031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I = Tmp.begin(), E = Tmp.end(); I!=E; ++I) { 26971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2698a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(*I); 2699250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu SVal loc = state->getSVal(Ex); 27001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 27011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Perform a load. 2702031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp2; 2703250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu evalLoad(Tmp2, Ex, *I, state, loc); 2704540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek 2705bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu for (ExplodedNodeSet::iterator I2=Tmp2.begin(), E2=Tmp2.end();I2!=E2;++I2) { 27061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2707a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek state = GetState(*I2); 27081397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V2_untested = state->getSVal(Ex); 27091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 27101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Propagate unknown and undefined values. 27115b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek if (V2_untested.isUnknownOrUndef()) { 27125b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek MakeNode(Dst, U, *I2, state->BindExpr(U, V2_untested)); 27131b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek continue; 2714b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek } 27155b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek DefinedSVal V2 = cast<DefinedSVal>(V2_untested); 27161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 27171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Handle all other values. 27182de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall BinaryOperator::Opcode Op = U->isIncrementOp() ? BO_Add 27192de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall : BO_Sub; 272021028dd8850c64a414f7a82dfddcc291351203d6Ted Kremenek 2721a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu // If the UnaryOperator has non-location type, use its type to create the 2722a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu // constant value. If the UnaryOperator has location type, create the 2723a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu // constant with int type and pointer width. 2724a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu SVal RHS; 2725a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu 2726a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu if (U->getType()->isAnyPointerType()) 2727a6b0b96e5376cd9cf182a3e240e0537feed43cdeTed Kremenek RHS = svalBuilder.makeArrayIndex(1); 2728a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu else 2729c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek RHS = svalBuilder.makeIntVal(1, U->getType()); 2730a52ad4e1f423bed2e9e0dcb12661268091d20a54Zhongxing Xu 27319c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek SVal Result = evalBinOp(state, Op, V2, RHS, U->getType()); 27321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2733bb9b2711ded08d39f9c9aa08b06ac5e288f32c62Ted Kremenek // Conjure a new symbol if necessary to recover precision. 2734af48fdd35633f53c74e982ba7922ca7b2051c1f5Ted Kremenek if (Result.isUnknown() || !getConstraintManager().canReasonAbout(Result)){ 27355b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek DefinedOrUnknownSVal SymVal = 2736c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.getConjuredSymbolVal(NULL, Ex, 27378780679b02bea5ab6360f3f8ebf3b221aaeda93fTed Kremenek Builder->getCurrentBlockCount()); 27385b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek Result = SymVal; 27391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2740af48fdd35633f53c74e982ba7922ca7b2051c1f5Ted Kremenek // If the value is a location, ++/-- should always preserve 27416c07bdba93b095b66e2c8c82dd5ed458fa8285eaTed Kremenek // non-nullness. Check if the original value was non-null, and if so 27421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // propagate that constraint. 27437dfc9420babe83e236a47e752f8723bd06070d9dZhanyong Wan if (Loc::isLocType(U->getType())) { 27445b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek DefinedOrUnknownSVal Constraint = 2745250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu svalBuilder.evalEQ(state, V2,svalBuilder.makeZeroVal(U->getType())); 27461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 274728f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek if (!state->assume(Constraint, true)) { 2748af48fdd35633f53c74e982ba7922ca7b2051c1f5Ted Kremenek // It isn't feasible for the original value to be null. 2749af48fdd35633f53c74e982ba7922ca7b2051c1f5Ted Kremenek // Propagate this constraint. 27509c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek Constraint = svalBuilder.evalEQ(state, SymVal, 2751c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.makeZeroVal(U->getType())); 27525b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek 27531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 275428f47b92e760ccf641ac91cb0fe1c12d9ca89795Ted Kremenek state = state->assume(Constraint, false); 2755a591bc04d21fa62ebffcb2c7814d738ca8f5e2f9Ted Kremenek assert(state); 27561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 27571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 2758af48fdd35633f53c74e982ba7922ca7b2051c1f5Ted Kremenek } 27591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2760250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu // Since the lvalue-to-rvalue conversion is explicit in the AST, 2761250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu // we bind an l-value if the operator is prefix and an lvalue (in C++). 2762b08624414a923e0df93dd7630fee51b0ff3cb7b1Zhongxing Xu if (U->isLValue()) 2763250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu state = state->BindExpr(U, loc); 2764250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu else 2765ce30688b8aa0effd70a7a69a4d1e3d6a2a86efcdTed Kremenek state = state->BindExpr(U, U->isPostfix() ? V2 : Result); 27661b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 27671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Perform the store. 2768250704bc525361e8612ea01f245a41a1193c13f0Zhongxing Xu evalStore(Dst, NULL, U, *I2, state, loc, Result); 27695b6dc2d72bf1bcf2b61fe5dbcd57bfa4aee76b29Ted Kremenek } 2770469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek } 27715b6dc2d72bf1bcf2b61fe5dbcd57bfa4aee76b29Ted Kremenek} 27725b6dc2d72bf1bcf2b61fe5dbcd57bfa4aee76b29Ted Kremenek 2773d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitAsmStmt(const AsmStmt* A, ExplodedNode* Pred, 2774bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu ExplodedNodeSet& Dst) { 2775ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek VisitAsmStmtHelperOutputs(A, A->begin_outputs(), A->end_outputs(), Pred, Dst); 27761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 2777ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek 2778d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitAsmStmtHelperOutputs(const AsmStmt* A, 277903509aea098772644bf4662dc1c88634818ceeccZhongxing Xu AsmStmt::const_outputs_iterator I, 278003509aea098772644bf4662dc1c88634818ceeccZhongxing Xu AsmStmt::const_outputs_iterator E, 2781bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu ExplodedNode* Pred, ExplodedNodeSet& Dst) { 2782ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek if (I == E) { 2783ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek VisitAsmStmtHelperInputs(A, A->begin_inputs(), A->end_inputs(), Pred, Dst); 2784ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek return; 2785ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek } 27861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2787031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2788892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(*I, Pred, Tmp); 2789ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek ++I; 27901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2791bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu for (ExplodedNodeSet::iterator NI = Tmp.begin(), NE = Tmp.end();NI != NE;++NI) 2792ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek VisitAsmStmtHelperOutputs(A, I, E, *NI, Dst); 2793ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek} 2794ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek 2795d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitAsmStmtHelperInputs(const AsmStmt* A, 279603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu AsmStmt::const_inputs_iterator I, 279703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu AsmStmt::const_inputs_iterator E, 2798b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek ExplodedNode* Pred, 2799bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu ExplodedNodeSet& Dst) { 2800ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek if (I == E) { 28011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2802ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek // We have processed both the inputs and the outputs. All of the outputs 28031c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu // should evaluate to Locs. Nuke all of their values. 28041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2805ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek // FIXME: Some day in the future it would be nice to allow a "plug-in" 2806ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek // which interprets the inline asm and stores proper results in the 2807ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek // outputs. 28081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2809a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek const GRState* state = GetState(Pred); 28101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 281103509aea098772644bf4662dc1c88634818ceeccZhongxing Xu for (AsmStmt::const_outputs_iterator OI = A->begin_outputs(), 2812ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek OE = A->end_outputs(); OI != OE; ++OI) { 28131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 28141397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal X = state->getSVal(*OI); 28151c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu assert (!isa<NonLoc>(X)); // Should be an Lval, or unknown, undef. 28161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 28171c96b24285d05c0eac455ae96d7c9ff43d42bc96Zhongxing Xu if (isa<Loc>(X)) 28183ff12591494a3cb3d3a24427975df58714ac3b2fTed Kremenek state = state->bindLoc(cast<Loc>(X), UnknownVal()); 2819ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek } 28201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2821a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek MakeNode(Dst, A, Pred, state); 2822ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek return; 2823ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek } 28241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2825031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 2826ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek Visit(*I, Pred, Tmp); 28271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2828ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek ++I; 28291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2830e1ccccff777f6bad6b25e9c6a762f98fd8003181Ted Kremenek for (ExplodedNodeSet::iterator NI = Tmp.begin(), NE = Tmp.end(); NI!=NE; ++NI) 2831ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek VisitAsmStmtHelperInputs(A, I, E, *NI, Dst); 2832ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek} 2833ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek 2834d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitReturnStmt(const ReturnStmt *RS, ExplodedNode *Pred, 28351053d246f451c399468248625d1146e3d845e21eTed Kremenek ExplodedNodeSet &Dst) { 28361053d246f451c399468248625d1146e3d845e21eTed Kremenek ExplodedNodeSet Src; 283703509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const Expr *RetE = RS->getRetValue()) { 2838bd2b2084e58577f17308f910770a5563a344251aZhongxing Xu // Record the returned expression in the state. It will be used in 2839e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenek // processCallExit to bind the return value to the call expr. 28406190ec29f0895185bbec95a932429b8832917fecZhongxing Xu { 2841b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek static int tag = 0; 28426190ec29f0895185bbec95a932429b8832917fecZhongxing Xu const GRState *state = GetState(Pred); 28436190ec29f0895185bbec95a932429b8832917fecZhongxing Xu state = state->set<ReturnExpr>(RetE); 2844b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek Pred = Builder->generateNode(RetE, state, Pred, &tag); 28456190ec29f0895185bbec95a932429b8832917fecZhongxing Xu } 28466190ec29f0895185bbec95a932429b8832917fecZhongxing Xu // We may get a NULL Pred because we generated a cached node. 28476190ec29f0895185bbec95a932429b8832917fecZhongxing Xu if (Pred) 28486190ec29f0895185bbec95a932429b8832917fecZhongxing Xu Visit(RetE, Pred, Src); 284902737ed29d7fff2206f7c7ee958cdf0665e35542Ted Kremenek } 28501053d246f451c399468248625d1146e3d845e21eTed Kremenek else { 28511053d246f451c399468248625d1146e3d845e21eTed Kremenek Src.Add(Pred); 28521053d246f451c399468248625d1146e3d845e21eTed Kremenek } 2853b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 28541053d246f451c399468248625d1146e3d845e21eTed Kremenek ExplodedNodeSet CheckedSet; 2855eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(CheckedSet, Src, RS, *this); 2856b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 28571053d246f451c399468248625d1146e3d845e21eTed Kremenek for (ExplodedNodeSet::iterator I = CheckedSet.begin(), E = CheckedSet.end(); 28581053d246f451c399468248625d1146e3d845e21eTed Kremenek I != E; ++I) { 28596b31e8ed11721505645860f40486e091ecd23dd0Ted Kremenek 2860d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis assert(Builder && "StmtNodeBuilder must be defined."); 2861b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 28621053d246f451c399468248625d1146e3d845e21eTed Kremenek Pred = *I; 28631053d246f451c399468248625d1146e3d845e21eTed Kremenek unsigned size = Dst.size(); 2864b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 28651053d246f451c399468248625d1146e3d845e21eTed Kremenek SaveAndRestore<bool> OldSink(Builder->BuildSinks); 2866b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek SaveOr OldHasGen(Builder->hasGeneratedNode); 2867b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 28689c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek getTF().evalReturn(Dst, *this, *Builder, RS, Pred); 2869b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 2870b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // Handle the case where no nodes where generated. 2871b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek if (!Builder->BuildSinks && Dst.size() == size && 2872b4857264b8d3d861f688cdaa174aab30e0729a73Ted Kremenek !Builder->hasGeneratedNode) 28731053d246f451c399468248625d1146e3d845e21eTed Kremenek MakeNode(Dst, RS, Pred, GetState(Pred)); 28745917d7894e8274b9625275dd4dd86c5d0040a242Ted Kremenek } 287502737ed29d7fff2206f7c7ee958cdf0665e35542Ted Kremenek} 287655deb97341819080d6d127d29e25b9502e4f2e3cTed Kremenek 2877e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 2878e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Transfer functions: Binary operators. 2879e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 2880e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 2881d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitBinaryOperator(const BinaryOperator* B, 2882031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode* Pred, 2883892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek ExplodedNodeSet& Dst) { 2884031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp1; 28851b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek Expr* LHS = B->getLHS()->IgnoreParens(); 28861b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek Expr* RHS = B->getRHS()->IgnoreParens(); 28871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2888892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Visit(LHS, Pred, Tmp1); 2889668399b23cf18124c8c8c41a14a7712212f6fa45Zhongxing Xu ExplodedNodeSet Tmp3; 2890668399b23cf18124c8c8c41a14a7712212f6fa45Zhongxing Xu 2891e1ccccff777f6bad6b25e9c6a762f98fd8003181Ted Kremenek for (ExplodedNodeSet::iterator I1=Tmp1.begin(), E1=Tmp1.end(); I1!=E1; ++I1) { 289259fea60cc3dde7a14eeafab9469cb911023fdd7fZhongxing Xu SVal LeftV = GetState(*I1)->getSVal(LHS); 2893031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp2; 28941b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek Visit(RHS, *I1, Tmp2); 28956403b57eda05a22273d920ad0bd2991d11eaa7b8Zhongxing Xu 28966403b57eda05a22273d920ad0bd2991d11eaa7b8Zhongxing Xu ExplodedNodeSet CheckedSet; 2897eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPreStmt(CheckedSet, Tmp2, B, *this); 28981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 28991b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // With both the LHS and RHS evaluated, process the operation itself. 29001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ExplodedNodeSet::iterator I2=CheckedSet.begin(), E2=CheckedSet.end(); 29026403b57eda05a22273d920ad0bd2991d11eaa7b8Zhongxing Xu I2 != E2; ++I2) { 2903cf78b6a771bb4537d5ee8fa44e718e842c2f70c7Ted Kremenek 29045b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek const GRState *state = GetState(*I2); 29051397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal RightV = state->getSVal(RHS); 29061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29075b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek BinaryOperator::Opcode Op = B->getOpcode(); 29081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29092de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (Op == BO_Assign) { 291073af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // EXPERIMENTAL: "Conjured" symbols. 291173af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // FIXME: Handle structs. 29120e82a936389ead8f22077d5b021cab4ab7bd9899Ted Kremenek if (RightV.isUnknown() ||!getConstraintManager().canReasonAbout(RightV)) 29130e82a936389ead8f22077d5b021cab4ab7bd9899Ted Kremenek { 291473af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu unsigned Count = Builder->getCurrentBlockCount(); 2915c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek RightV = svalBuilder.getConjuredSymbolVal(NULL, B->getRHS(), Count); 2916ab2b8c54bca82866876f91e756788916d3fa20c3Ted Kremenek } 2917662174ca204cb520f634bdcb34a3708f45389d14Zhongxing Xu 2918892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek SVal ExprVal = B->isLValue() ? LeftV : RightV; 2919662174ca204cb520f634bdcb34a3708f45389d14Zhongxing Xu 292073af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // Simulate the effects of a "store": bind the value of the RHS 292173af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // to the L-Value represented by the LHS. 29229c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalStore(Tmp3, B, LHS, *I2, state->BindExpr(B, ExprVal), LeftV,RightV); 292373af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu continue; 292473af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu } 2925b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 292673af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu if (!B->isAssignmentOp()) { 292773af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // Process non-assignments except commas or short-circuited 292873af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu // logical expressions (LAnd and LOr). 29299c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek SVal Result = evalBinOp(state, Op, LeftV, RightV, B->getType()); 2930b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 293173af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu if (Result.isUnknown()) { 293296ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek MakeNode(Tmp3, B, *I2, state); 293373af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu continue; 293473af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu } 2935b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 293673af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu state = state->BindExpr(B, Result); 2937b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 2938668399b23cf18124c8c8c41a14a7712212f6fa45Zhongxing Xu MakeNode(Tmp3, B, *I2, state); 293973af2d5c92420e9cd8b6a9fefcdc2c744aedda1fZhongxing Xu continue; 29401b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 29411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29421b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek assert (B->isCompoundAssignmentOp()); 29431b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 2944cad2996edf303978932c621ab02729dc11debb81Ted Kremenek switch (Op) { 2945cad2996edf303978932c621ab02729dc11debb81Ted Kremenek default: 2946cad2996edf303978932c621ab02729dc11debb81Ted Kremenek assert(0 && "Invalid opcode for compound assignment."); 29472de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_MulAssign: Op = BO_Mul; break; 29482de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_DivAssign: Op = BO_Div; break; 29492de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_RemAssign: Op = BO_Rem; break; 29502de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_AddAssign: Op = BO_Add; break; 29512de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_SubAssign: Op = BO_Sub; break; 29522de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_ShlAssign: Op = BO_Shl; break; 29532de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_ShrAssign: Op = BO_Shr; break; 29542de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_AndAssign: Op = BO_And; break; 29552de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_XorAssign: Op = BO_Xor; break; 29562de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_OrAssign: Op = BO_Or; break; 2957934e3e93eface34e73257a4a80cc6752edd588ceTed Kremenek } 29581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29591b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Perform a load (the LHS). This performs the checks for 29601b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // null dereferences, and so on. 2961c39b2bdd4cef51021fe90de91c9fb6d1a15f4d0aZhongxing Xu ExplodedNodeSet Tmp4; 29621397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal location = state->getSVal(LHS); 29639c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek evalLoad(Tmp4, LHS, *I2, state, location); 29641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2965c39b2bdd4cef51021fe90de91c9fb6d1a15f4d0aZhongxing Xu for (ExplodedNodeSet::iterator I4=Tmp4.begin(), E4=Tmp4.end(); I4!=E4; 2966c39b2bdd4cef51021fe90de91c9fb6d1a15f4d0aZhongxing Xu ++I4) { 2967c39b2bdd4cef51021fe90de91c9fb6d1a15f4d0aZhongxing Xu state = GetState(*I4); 29681397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getSVal(LHS); 29691b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 29701b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Get the computation type. 297132c3fa4195762ba93f0b7114ab36c0941bc34432Ted Kremenek QualType CTy = 297232c3fa4195762ba93f0b7114ab36c0941bc34432Ted Kremenek cast<CompoundAssignOperator>(B)->getComputationResultType(); 297360595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek CTy = getContext().getCanonicalType(CTy); 2974ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman 297532c3fa4195762ba93f0b7114ab36c0941bc34432Ted Kremenek QualType CLHSTy = 297632c3fa4195762ba93f0b7114ab36c0941bc34432Ted Kremenek cast<CompoundAssignOperator>(B)->getComputationLHSType(); 297732c3fa4195762ba93f0b7114ab36c0941bc34432Ted Kremenek CLHSTy = getContext().getCanonicalType(CLHSTy); 2978ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman 297960595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek QualType LTy = getContext().getCanonicalType(LHS->getType()); 2980ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman 2981ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman // Promote LHS. 29829c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek V = svalBuilder.evalCast(V, CLHSTy, LTy); 2983ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman 29841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Compute the result of the operation. 29859c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek SVal Result = svalBuilder.evalCast(evalBinOp(state, Op, V, RightV, CTy), 2986814e6b915450456eb2a1ba15d82fc7f8ae3bc8a6Zhongxing Xu B->getType(), CTy); 29871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29889ff267d0d6b8249a017fca0b56a0c5a6bcb7ef8aTed Kremenek // EXPERIMENTAL: "Conjured" symbols. 29899ff267d0d6b8249a017fca0b56a0c5a6bcb7ef8aTed Kremenek // FIXME: Handle structs. 29901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 299160595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek SVal LHSVal; 29921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29930e82a936389ead8f22077d5b021cab4ab7bd9899Ted Kremenek if (Result.isUnknown() || 29940e82a936389ead8f22077d5b021cab4ab7bd9899Ted Kremenek !getConstraintManager().canReasonAbout(Result)) { 29951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29969ff267d0d6b8249a017fca0b56a0c5a6bcb7ef8aTed Kremenek unsigned Count = Builder->getCurrentBlockCount(); 29971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 299860595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek // The symbolic value is actually for the type of the left-hand side 299960595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek // expression, not the computation type, as this is the value the 300060595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek // LValue on the LHS will bind to. 3001c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek LHSVal = svalBuilder.getConjuredSymbolVal(NULL, B->getRHS(), LTy, Count); 30021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 30031c0c23325312df5d40fe788ffcb48484f190e9a3Zhongxing Xu // However, we need to convert the symbol to the computation type. 30049c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek Result = svalBuilder.evalCast(LHSVal, CTy, LTy); 30059ff267d0d6b8249a017fca0b56a0c5a6bcb7ef8aTed Kremenek } 300660595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek else { 300760595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek // The left-hand side may bind to a different value then the 300860595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek // computation type. 30099c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek LHSVal = svalBuilder.evalCast(Result, LTy, CTy); 301060595dab8bd9800f6b0b724fa4d859ada78c264fTed Kremenek } 30111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3012f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu // In C++, assignment and compound assignment operators return an 3013f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu // lvalue. 3014f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu if (B->isLValue()) 3015f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu state = state->BindExpr(B, location); 3016f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu else 3017f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu state = state->BindExpr(B, Result); 3018f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu 3019f9d3cbbe07afa05c2414c7120d7141409e5a3663Zhongxing Xu evalStore(Tmp3, B, LHS, *I4, state, location, LHSVal); 3020ab2b8c54bca82866876f91e756788916d3fa20c3Ted Kremenek } 3021cb448ca8b372710d48a232fddcec615164eee574Ted Kremenek } 3022d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek } 3023668399b23cf18124c8c8c41a14a7712212f6fa45Zhongxing Xu 3024eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis getCheckerManager().runCheckersForPostStmt(Dst, Tmp3, B, *this); 3025094bef56a7900f13bb777f9a352704104b1458e7Ted Kremenek} 3026094bef56a7900f13bb777f9a352704104b1458e7Ted Kremenek 3027094bef56a7900f13bb777f9a352704104b1458e7Ted Kremenek//===----------------------------------------------------------------------===// 3028e01c98767dfd7153c3c84637c36659e3bbe16ff7Ted Kremenek// Visualization. 3029ee98546b0d5f3439c4a590b0d7d1545af794a0ecTed Kremenek//===----------------------------------------------------------------------===// 3030ee98546b0d5f3439c4a590b0d7d1545af794a0ecTed Kremenek 3031aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek#ifndef NDEBUG 3032d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisstatic ExprEngine* GraphPrintCheckerState; 3033e97ca065c91ff9ca2a2a42eb443eaa553c40441cTed Kremenekstatic SourceManager* GraphPrintSourceManager; 30343b4f6702860208692f6ef28401e68de4e3ff9af9Ted Kremenek 3035aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremeneknamespace llvm { 3036aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenektemplate<> 303747491f8b7adf9d42a404d44c073e8a5308fa6cfcDouglas Gregorstruct DOTGraphTraits<ExplodedNode*> : 3038aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek public DefaultDOTGraphTraits { 3039006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser 3040006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {} 3041006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser 3042d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis // FIXME: Since we do not cache error nodes in ExprEngine now, this does not 3043ec9227fea66c3439991fc84b0d33b0a8b4b8875eZhongxing Xu // work. 3044031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu static std::string getNodeAttributes(const ExplodedNode* N, void*) { 30451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 304610f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#if 0 304710f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // FIXME: Replace with a general scheme to tell if the node is 304810f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // an error node. 3049a3fadfcce5911742801a302cac82d4fe54d5c682Ted Kremenek if (GraphPrintCheckerState->isImplicitNullDeref(N) || 30509dca062461a6244cf0f733346657fa3eee853f9bTed Kremenek GraphPrintCheckerState->isExplicitNullDeref(N) || 30514a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek GraphPrintCheckerState->isUndefDeref(N) || 30524a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek GraphPrintCheckerState->isUndefStore(N) || 30534a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek GraphPrintCheckerState->isUndefControlFlow(N) || 30545e03fcb5420c33207433dd6f800588e256dd9bdbTed Kremenek GraphPrintCheckerState->isUndefResult(N) || 30552ded35a576e3899553ea0ccfcbf5cbdb3d8cf664Ted Kremenek GraphPrintCheckerState->isBadCall(N) || 30562ded35a576e3899553ea0ccfcbf5cbdb3d8cf664Ted Kremenek GraphPrintCheckerState->isUndefArg(N)) 3057a3fadfcce5911742801a302cac82d4fe54d5c682Ted Kremenek return "color=\"red\",style=\"filled\""; 30581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 30598cc13ea74fea1c04042a2f4087665bc5182e8408Ted Kremenek if (GraphPrintCheckerState->isNoReturnCall(N)) 30608cc13ea74fea1c04042a2f4087665bc5182e8408Ted Kremenek return "color=\"blue\",style=\"filled\""; 30612055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu#endif 3062a3fadfcce5911742801a302cac82d4fe54d5c682Ted Kremenek return ""; 3063a3fadfcce5911742801a302cac82d4fe54d5c682Ted Kremenek } 30641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3065006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser static std::string getNodeLabel(const ExplodedNode* N, void*){ 30661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 306753ba0b636194dbeaa65a6f85316c9397a0c5298bTed Kremenek std::string sbuf; 306853ba0b636194dbeaa65a6f85316c9397a0c5298bTed Kremenek llvm::raw_string_ostream Out(sbuf); 3069803c9edd06e8f936821525d36b1d8cc131e37d44Ted Kremenek 3070803c9edd06e8f936821525d36b1d8cc131e37d44Ted Kremenek // Program Location. 3071aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek ProgramPoint Loc = N->getLocation(); 30721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3073aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek switch (Loc.getKind()) { 3074aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek case ProgramPoint::BlockEntranceKind: 30751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Out << "Block Entrance: B" 3076aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek << cast<BlockEntrance>(Loc).getBlock()->getBlockID(); 3077aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek break; 30781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3079aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek case ProgramPoint::BlockExitKind: 3080aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek assert (false); 3081aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek break; 30821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3083102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor case ProgramPoint::CallEnterKind: 3084102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor Out << "CallEnter"; 3085102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor break; 3086102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor 3087102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor case ProgramPoint::CallExitKind: 3088102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor Out << "CallExit"; 3089102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor break; 3090102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor 3091aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek default: { 30925f85e17df3f5b0a8021443f2b590daecfb2cbd17Ted Kremenek if (StmtPoint *L = dyn_cast<StmtPoint>(&Loc)) { 30935f85e17df3f5b0a8021443f2b590daecfb2cbd17Ted Kremenek const Stmt* S = L->getStmt(); 30948c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek SourceLocation SLoc = S->getLocStart(); 30958c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek 30961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Out << S->getStmtClassName() << ' ' << (void*) S << ' '; 3097e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner LangOptions LO; // FIXME. 3098e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner S->printPretty(Out, 0, PrintingPolicy(LO)); 30991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 31001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (SLoc.isFileID()) { 31018c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\lline=" 31027da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << GraphPrintSourceManager->getInstantiationLineNumber(SLoc) 31037da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << " col=" 3104a77c031cb66f75d22672070052cc6e0205289ff8Chandler Carruth << GraphPrintSourceManager->getExpansionColumnNumber(SLoc) 31057da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << "\\l"; 31068c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek } 31071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 31085f85e17df3f5b0a8021443f2b590daecfb2cbd17Ted Kremenek if (isa<PreStmt>(Loc)) 31091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Out << "\\lPreStmt\\l;"; 31105f85e17df3f5b0a8021443f2b590daecfb2cbd17Ted Kremenek else if (isa<PostLoad>(Loc)) 31117090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek Out << "\\lPostLoad\\l;"; 31127090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek else if (isa<PostStore>(Loc)) 31137090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek Out << "\\lPostStore\\l"; 31147090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek else if (isa<PostLValue>(Loc)) 31157090d5465de7ca620da16211cf886edf1edc1f1fTed Kremenek Out << "\\lPostLValue\\l"; 31161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 311710f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#if 0 311810f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // FIXME: Replace with a general scheme to determine 311910f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // the name of the check. 31208c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek if (GraphPrintCheckerState->isImplicitNullDeref(N)) 31218c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Implicit-Null Dereference.\\l"; 31228c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isExplicitNullDeref(N)) 31238c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Explicit-Null Dereference.\\l"; 31248c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isUndefDeref(N)) 31258c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Dereference of undefialied value.\\l"; 31268c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isUndefStore(N)) 31278c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Store to Undefined Loc."; 31288c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isUndefResult(N)) 31298c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Result of operation is undefined."; 31308c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isNoReturnCall(N)) 31318c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Call to function marked \"noreturn\"."; 31328c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isBadCall(N)) 31338c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Call to NULL/Undefined."; 31348c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek else if (GraphPrintCheckerState->isUndefArg(N)) 31358c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek Out << "\\|Argument in call is undefined"; 313610f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#endif 31371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 31388c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek break; 31398c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek } 31408c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek 3141aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek const BlockEdge& E = cast<BlockEdge>(Loc); 3142aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek Out << "Edge: (B" << E.getSrc()->getBlockID() << ", B" 3143aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek << E.getDst()->getBlockID() << ')'; 31441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 314503509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const Stmt* T = E.getSrc()->getTerminator()) { 31461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3147e97ca065c91ff9ca2a2a42eb443eaa553c40441cTed Kremenek SourceLocation SLoc = T->getLocStart(); 31481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3149b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek Out << "\\|Terminator: "; 3150e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner LangOptions LO; // FIXME. 3151e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner E.getSrc()->printTerminator(Out, LO); 31521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 31539b5551d7f0209cec8b9c555cf70e893940674e5cTed Kremenek if (SLoc.isFileID()) { 31549b5551d7f0209cec8b9c555cf70e893940674e5cTed Kremenek Out << "\\lline=" 31557da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << GraphPrintSourceManager->getInstantiationLineNumber(SLoc) 31567da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << " col=" 3157a77c031cb66f75d22672070052cc6e0205289ff8Chandler Carruth << GraphPrintSourceManager->getExpansionColumnNumber(SLoc); 31589b5551d7f0209cec8b9c555cf70e893940674e5cTed Kremenek } 31591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3160daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek if (isa<SwitchStmt>(T)) { 316103509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Stmt* Label = E.getDst()->getLabel(); 31621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 31631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (Label) { 316403509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const CaseStmt* C = dyn_cast<CaseStmt>(Label)) { 3165daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << "\\lcase "; 3166e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner LangOptions LO; // FIXME. 3167e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner C->getLHS()->printPretty(Out, 0, PrintingPolicy(LO)); 31681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 316903509aea098772644bf4662dc1c88634818ceeccZhongxing Xu if (const Stmt* RHS = C->getRHS()) { 3170daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << " .. "; 3171e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner RHS->printPretty(Out, 0, PrintingPolicy(LO)); 3172daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 31731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3174daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << ":"; 3175daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 3176daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek else { 3177daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek assert (isa<DefaultStmt>(Label)); 3178daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << "\\ldefault:"; 3179daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 3180daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 31811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump else 3182daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << "\\l(implicit) default:"; 3183daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 3184daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek else if (isa<IndirectGotoStmt>(T)) { 3185b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek // FIXME 3186b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 3187b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek else { 3188b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek Out << "\\lCondition: "; 3189b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek if (*E.getSrc()->succ_begin() == E.getDst()) 3190b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek Out << "true"; 3191b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek else 31921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Out << "false"; 3193b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 31941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3195b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek Out << "\\l"; 3196b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 31971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 319810f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#if 0 319910f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // FIXME: Replace with a general scheme to determine 320010f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // the name of the check. 32014a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek if (GraphPrintCheckerState->isUndefControlFlow(N)) { 32024a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek Out << "\\|Control-flow based on\\lUndefined value.\\l"; 32033b4f6702860208692f6ef28401e68de4e3ff9af9Ted Kremenek } 320410f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#endif 3205aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek } 3206aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek } 32071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3208b65be70779bdaf75e91731bfd89362bf4118ae31Ted Kremenek const GRState *state = N->getState(); 32098673a68a8ab55a2bd03f92d636a50e6b0bfad2daTed Kremenek Out << "\\|StateID: " << (void*) state 32108673a68a8ab55a2bd03f92d636a50e6b0bfad2daTed Kremenek << " NodeID: " << (void*) N << "\\|"; 3211c179a7fbb294fe3ff6cf5479f6239a10f39628c7Zhongxing Xu state->printDOT(Out, *N->getLocationContext()->getCFG()); 3212803c9edd06e8f936821525d36b1d8cc131e37d44Ted Kremenek Out << "\\l"; 3213aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek return Out.str(); 3214aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek } 3215aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek}; 32161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} // end llvm namespace 3217aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek#endif 3218aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek 3219ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek#ifndef NDEBUG 32207ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenektemplate <typename ITERATOR> 3221031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing XuExplodedNode* GetGraphNode(ITERATOR I) { return *I; } 32227ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenek 3223031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xutemplate <> ExplodedNode* 3224031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing XuGetGraphNode<llvm::DenseMap<ExplodedNode*, Expr*>::iterator> 3225031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu (llvm::DenseMap<ExplodedNode*, Expr*>::iterator I) { 32267ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenek return I->first; 32277ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenek} 3228ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek#endif 3229ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek 3230d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ViewGraph(bool trim) { 32311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump#ifndef NDEBUG 3232ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek if (trim) { 3233031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu std::vector<ExplodedNode*> Src; 3234940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek 3235940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek // Flush any outstanding reports to make sure we cover all the nodes. 3236940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek // This does not cause them to get displayed. 3237940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek for (BugReporter::iterator I=BR.begin(), E=BR.end(); I!=E; ++I) 3238940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek const_cast<BugType*>(*I)->FlushReports(BR); 3239940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek 3240940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek // Iterate through the reports and get their nodes. 3241404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis for (BugReporter::EQClasses_iterator 3242404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis EI = BR.EQClasses_begin(), EE = BR.EQClasses_end(); EI != EE; ++EI) { 3243404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis BugReportEquivClass& EQ = *EI; 3244404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis const BugReport &R = **EQ.begin(); 3245404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis ExplodedNode *N = const_cast<ExplodedNode*>(R.getErrorNode()); 3246404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis if (N) Src.push_back(N); 3247940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek } 32481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 32497ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenek ViewGraph(&Src[0], &Src[0]+Src.size()); 3250ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek } 3251493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek else { 3252493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintCheckerState = this; 3253493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintSourceManager = &getContext().getSourceManager(); 3254ae6814efb6c41bd0c0f6413d25097105284d5be7Ted Kremenek 3255d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis llvm::ViewGraph(*G.roots_begin(), "ExprEngine"); 32561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3257493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintCheckerState = NULL; 3258493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintSourceManager = NULL; 3259493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek } 3260493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek#endif 3261493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek} 3262493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek 3263d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ViewGraph(ExplodedNode** Beg, ExplodedNode** End) { 3264493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek#ifndef NDEBUG 3265493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintCheckerState = this; 3266493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintSourceManager = &getContext().getSourceManager(); 32671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3268031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu std::auto_ptr<ExplodedGraph> TrimmedG(G.Trim(Beg, End).first); 3269493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek 3270cf118d41f7930a18dce97416ef7834a62642f587Ted Kremenek if (!TrimmedG.get()) 32716cb7c1a43b0c8f739d1f54b7fdae5ede86033496Benjamin Kramer llvm::errs() << "warning: Trimmed ExplodedGraph is empty.\n"; 3272cf118d41f7930a18dce97416ef7834a62642f587Ted Kremenek else 3273d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis llvm::ViewGraph(*TrimmedG->roots_begin(), "TrimmedExprEngine"); 32741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 32753b4f6702860208692f6ef28401e68de4e3ff9af9Ted Kremenek GraphPrintCheckerState = NULL; 3276e97ca065c91ff9ca2a2a42eb443eaa553c40441cTed Kremenek GraphPrintSourceManager = NULL; 3277e01c98767dfd7153c3c84637c36659e3bbe16ff7Ted Kremenek#endif 3278ee98546b0d5f3439c4a590b0d7d1545af794a0ecTed Kremenek} 3279