ProgramState.h revision dbd658e139b3e0bf084f75feaea8d844af9e319f
1//== ProgramState.h - Path-sensitive "State" for tracking values -*- C++ -*--=// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines SymbolRef, ExprBindKey, and ProgramState*. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_GR_VALUESTATE_H 15#define LLVM_CLANG_GR_VALUESTATE_H 16 17#include "clang/Basic/LLVM.h" 18#include "clang/StaticAnalyzer/Core/PathSensitive/ConstraintManager.h" 19#include "clang/StaticAnalyzer/Core/PathSensitive/Environment.h" 20#include "clang/StaticAnalyzer/Core/PathSensitive/Store.h" 21#include "clang/StaticAnalyzer/Core/PathSensitive/SValBuilder.h" 22#include "llvm/ADT/PointerIntPair.h" 23#include "llvm/ADT/FoldingSet.h" 24#include "llvm/ADT/ImmutableMap.h" 25 26namespace llvm { 27class APSInt; 28class BumpPtrAllocator; 29} 30 31namespace clang { 32class ASTContext; 33 34namespace ento { 35 36class ProgramStateManager; 37 38typedef ConstraintManager* (*ConstraintManagerCreator)(ProgramStateManager&, 39 SubEngine&); 40typedef StoreManager* (*StoreManagerCreator)(ProgramStateManager&); 41 42//===----------------------------------------------------------------------===// 43// ProgramStateTrait - Traits used by the Generic Data Map of a ProgramState. 44//===----------------------------------------------------------------------===// 45 46template <typename T> struct ProgramStatePartialTrait; 47 48template <typename T> struct ProgramStateTrait { 49 typedef typename T::data_type data_type; 50 static inline void *GDMIndex() { return &T::TagInt; } 51 static inline void *MakeVoidPtr(data_type D) { return (void*) D; } 52 static inline data_type MakeData(void *const* P) { 53 return P ? (data_type) *P : (data_type) 0; 54 } 55}; 56 57class ProgramStateManager; 58 59/// ProgramState - This class encapsulates: 60/// 61/// 1. A mapping from expressions to values (Environment) 62/// 2. A mapping from locations to values (Store) 63/// 3. Constraints on symbolic values (GenericDataMap) 64/// 65/// Together these represent the "abstract state" of a program. 66/// 67/// ProgramState is intended to be used as a functional object; that is, 68/// once it is created and made "persistent" in a FoldingSet, its 69/// values will never change. 70class ProgramState : public llvm::FoldingSetNode { 71public: 72 typedef llvm::ImmutableSet<llvm::APSInt*> IntSetTy; 73 typedef llvm::ImmutableMap<void*, void*> GenericDataMap; 74 75private: 76 void operator=(const ProgramState& R) const; // Do not implement. 77 78 friend class ProgramStateManager; 79 friend class ExplodedGraph; 80 friend class ExplodedNode; 81 82 ProgramStateManager *stateMgr; 83 Environment Env; // Maps a Stmt to its current SVal. 84 Store store; // Maps a location to its current value. 85 GenericDataMap GDM; // Custom data stored by a client of this class. 86 unsigned refCount; 87 88 /// makeWithStore - Return a ProgramState with the same values as the current 89 /// state with the exception of using the specified Store. 90 const ProgramState *makeWithStore(const StoreRef &store) const; 91 92 void setStore(const StoreRef &storeRef); 93 94public: 95 96 /// This ctor is used when creating the first ProgramState object. 97 ProgramState(ProgramStateManager *mgr, const Environment& env, 98 StoreRef st, GenericDataMap gdm); 99 100 /// Copy ctor - We must explicitly define this or else the "Next" ptr 101 /// in FoldingSetNode will also get copied. 102 ProgramState(const ProgramState &RHS); 103 104 ~ProgramState(); 105 106 /// Return the ProgramStateManager associated with this state. 107 ProgramStateManager &getStateManager() const { return *stateMgr; } 108 109 /// Return true if this state is referenced by a persistent ExplodedNode. 110 bool referencedByExplodedNode() const { return refCount > 0; } 111 112 /// getEnvironment - Return the environment associated with this state. 113 /// The environment is the mapping from expressions to values. 114 const Environment& getEnvironment() const { return Env; } 115 116 /// Return the store associated with this state. The store 117 /// is a mapping from locations to values. 118 Store getStore() const { return store; } 119 120 121 /// getGDM - Return the generic data map associated with this state. 122 GenericDataMap getGDM() const { return GDM; } 123 124 void setGDM(GenericDataMap gdm) { GDM = gdm; } 125 126 /// Profile - Profile the contents of a ProgramState object for use in a 127 /// FoldingSet. Two ProgramState objects are considered equal if they 128 /// have the same Environment, Store, and GenericDataMap. 129 static void Profile(llvm::FoldingSetNodeID& ID, const ProgramState *V) { 130 V->Env.Profile(ID); 131 ID.AddPointer(V->store); 132 V->GDM.Profile(ID); 133 } 134 135 /// Profile - Used to profile the contents of this object for inclusion 136 /// in a FoldingSet. 137 void Profile(llvm::FoldingSetNodeID& ID) const { 138 Profile(ID, this); 139 } 140 141 BasicValueFactory &getBasicVals() const; 142 SymbolManager &getSymbolManager() const; 143 144 //==---------------------------------------------------------------------==// 145 // Constraints on values. 146 //==---------------------------------------------------------------------==// 147 // 148 // Each ProgramState records constraints on symbolic values. These constraints 149 // are managed using the ConstraintManager associated with a ProgramStateManager. 150 // As constraints gradually accrue on symbolic values, added constraints 151 // may conflict and indicate that a state is infeasible (as no real values 152 // could satisfy all the constraints). This is the principal mechanism 153 // for modeling path-sensitivity in ExprEngine/ProgramState. 154 // 155 // Various "assume" methods form the interface for adding constraints to 156 // symbolic values. A call to 'assume' indicates an assumption being placed 157 // on one or symbolic values. 'assume' methods take the following inputs: 158 // 159 // (1) A ProgramState object representing the current state. 160 // 161 // (2) The assumed constraint (which is specific to a given "assume" method). 162 // 163 // (3) A binary value "Assumption" that indicates whether the constraint is 164 // assumed to be true or false. 165 // 166 // The output of "assume*" is a new ProgramState object with the added constraints. 167 // If no new state is feasible, NULL is returned. 168 // 169 170 const ProgramState *assume(DefinedOrUnknownSVal cond, bool assumption) const; 171 172 /// This method assumes both "true" and "false" for 'cond', and 173 /// returns both corresponding states. It's shorthand for doing 174 /// 'assume' twice. 175 std::pair<const ProgramState*, const ProgramState*> 176 assume(DefinedOrUnknownSVal cond) const; 177 178 const ProgramState *assumeInBound(DefinedOrUnknownSVal idx, 179 DefinedOrUnknownSVal upperBound, 180 bool assumption) const; 181 182 //==---------------------------------------------------------------------==// 183 // Utility methods for getting regions. 184 //==---------------------------------------------------------------------==// 185 186 const VarRegion* getRegion(const VarDecl *D, const LocationContext *LC) const; 187 188 //==---------------------------------------------------------------------==// 189 // Binding and retrieving values to/from the environment and symbolic store. 190 //==---------------------------------------------------------------------==// 191 192 /// BindCompoundLiteral - Return the state that has the bindings currently 193 /// in this state plus the bindings for the CompoundLiteral. 194 const ProgramState *bindCompoundLiteral(const CompoundLiteralExpr *CL, 195 const LocationContext *LC, 196 SVal V) const; 197 198 /// Create a new state by binding the value 'V' to the statement 'S' in the 199 /// state's environment. 200 const ProgramState *BindExpr(const Stmt *S, SVal V, bool Invalidate = true) const; 201 202 /// Create a new state by binding the value 'V' and location 'locaton' to the 203 /// statement 'S' in the state's environment. 204 const ProgramState *bindExprAndLocation(const Stmt *S, SVal location, SVal V) 205 const; 206 207 const ProgramState *bindDecl(const VarRegion *VR, SVal V) const; 208 209 const ProgramState *bindDeclWithNoInit(const VarRegion *VR) const; 210 211 const ProgramState *bindLoc(Loc location, SVal V) const; 212 213 const ProgramState *bindLoc(SVal location, SVal V) const; 214 215 const ProgramState *bindDefault(SVal loc, SVal V) const; 216 217 const ProgramState *unbindLoc(Loc LV) const; 218 219 /// invalidateRegions - Returns the state with bindings for the given regions 220 /// cleared from the store. The regions are provided as a continuous array 221 /// from Begin to End. Optionally invalidates global regions as well. 222 const ProgramState *invalidateRegions(ArrayRef<const MemRegion *> Regions, 223 const Expr *E, unsigned BlockCount, 224 StoreManager::InvalidatedSymbols *IS = 0, 225 bool invalidateGlobals = false) const; 226 227 /// enterStackFrame - Returns the state for entry to the given stack frame, 228 /// preserving the current state. 229 const ProgramState *enterStackFrame(const StackFrameContext *frame) const; 230 231 /// Get the lvalue for a variable reference. 232 Loc getLValue(const VarDecl *D, const LocationContext *LC) const; 233 234 /// Get the lvalue for a StringLiteral. 235 Loc getLValue(const StringLiteral *literal) const; 236 237 Loc getLValue(const CompoundLiteralExpr *literal, 238 const LocationContext *LC) const; 239 240 /// Get the lvalue for an ivar reference. 241 SVal getLValue(const ObjCIvarDecl *decl, SVal base) const; 242 243 /// Get the lvalue for a field reference. 244 SVal getLValue(const FieldDecl *decl, SVal Base) const; 245 246 /// Get the lvalue for an array index. 247 SVal getLValue(QualType ElementType, SVal Idx, SVal Base) const; 248 249 const llvm::APSInt *getSymVal(SymbolRef sym) const; 250 251 /// Returns the SVal bound to the statement 'S' in the state's environment. 252 SVal getSVal(const Stmt *S, bool useOnlyDirectBindings = false) const; 253 254 SVal getSValAsScalarOrLoc(const Stmt *Ex) const; 255 256 SVal getSVal(Loc LV, QualType T = QualType()) const; 257 258 /// Returns the "raw" SVal bound to LV before any value simplfication. 259 SVal getRawSVal(Loc LV, QualType T= QualType()) const; 260 261 SVal getSVal(const MemRegion* R) const; 262 263 SVal getSValAsScalarOrLoc(const MemRegion *R) const; 264 265 bool scanReachableSymbols(SVal val, SymbolVisitor& visitor) const; 266 267 bool scanReachableSymbols(const SVal *I, const SVal *E, 268 SymbolVisitor &visitor) const; 269 270 bool scanReachableSymbols(const MemRegion * const *I, 271 const MemRegion * const *E, 272 SymbolVisitor &visitor) const; 273 274 template <typename CB> CB scanReachableSymbols(SVal val) const; 275 template <typename CB> CB scanReachableSymbols(const SVal *beg, 276 const SVal *end) const; 277 278 template <typename CB> CB 279 scanReachableSymbols(const MemRegion * const *beg, 280 const MemRegion * const *end) const; 281 282 //==---------------------------------------------------------------------==// 283 // Accessing the Generic Data Map (GDM). 284 //==---------------------------------------------------------------------==// 285 286 void *const* FindGDM(void *K) const; 287 288 template<typename T> 289 const ProgramState *add(typename ProgramStateTrait<T>::key_type K) const; 290 291 template <typename T> 292 typename ProgramStateTrait<T>::data_type 293 get() const { 294 return ProgramStateTrait<T>::MakeData(FindGDM(ProgramStateTrait<T>::GDMIndex())); 295 } 296 297 template<typename T> 298 typename ProgramStateTrait<T>::lookup_type 299 get(typename ProgramStateTrait<T>::key_type key) const { 300 void *const* d = FindGDM(ProgramStateTrait<T>::GDMIndex()); 301 return ProgramStateTrait<T>::Lookup(ProgramStateTrait<T>::MakeData(d), key); 302 } 303 304 template <typename T> 305 typename ProgramStateTrait<T>::context_type get_context() const; 306 307 308 template<typename T> 309 const ProgramState *remove(typename ProgramStateTrait<T>::key_type K) const; 310 311 template<typename T> 312 const ProgramState *remove(typename ProgramStateTrait<T>::key_type K, 313 typename ProgramStateTrait<T>::context_type C) const; 314 template <typename T> 315 const ProgramState *remove() const; 316 317 template<typename T> 318 const ProgramState *set(typename ProgramStateTrait<T>::data_type D) const; 319 320 template<typename T> 321 const ProgramState *set(typename ProgramStateTrait<T>::key_type K, 322 typename ProgramStateTrait<T>::value_type E) const; 323 324 template<typename T> 325 const ProgramState *set(typename ProgramStateTrait<T>::key_type K, 326 typename ProgramStateTrait<T>::value_type E, 327 typename ProgramStateTrait<T>::context_type C) const; 328 329 template<typename T> 330 bool contains(typename ProgramStateTrait<T>::key_type key) const { 331 void *const* d = FindGDM(ProgramStateTrait<T>::GDMIndex()); 332 return ProgramStateTrait<T>::Contains(ProgramStateTrait<T>::MakeData(d), key); 333 } 334 335 // Pretty-printing. 336 void print(raw_ostream &Out, CFG &C, const char *nl = "\n", 337 const char *sep = "") const; 338 339 void printStdErr(CFG &C) const; 340 341 void printDOT(raw_ostream &Out, CFG &C) const; 342 343private: 344 /// Increments the number of times this state is referenced by ExplodeNodes. 345 void incrementReferenceCount() { ++refCount; } 346 347 /// Decrement the number of times this state is referenced by ExplodeNodes. 348 void decrementReferenceCount() { 349 assert(refCount > 0); 350 --refCount; 351 } 352 353 const ProgramState * 354 invalidateRegionsImpl(ArrayRef<const MemRegion *> Regions, 355 const Expr *E, unsigned BlockCount, 356 StoreManager::InvalidatedSymbols &IS, 357 bool invalidateGlobals) const; 358}; 359 360class ProgramStateSet { 361 typedef llvm::SmallPtrSet<const ProgramState*,5> ImplTy; 362 ImplTy Impl; 363public: 364 ProgramStateSet() {} 365 366 inline void Add(const ProgramState *St) { 367 Impl.insert(St); 368 } 369 370 typedef ImplTy::const_iterator iterator; 371 372 inline unsigned size() const { return Impl.size(); } 373 inline bool empty() const { return Impl.empty(); } 374 375 inline iterator begin() const { return Impl.begin(); } 376 inline iterator end() const { return Impl.end(); } 377 378 class AutoPopulate { 379 ProgramStateSet &S; 380 unsigned StartSize; 381 const ProgramState *St; 382 public: 383 AutoPopulate(ProgramStateSet &s, const ProgramState *st) 384 : S(s), StartSize(S.size()), St(st) {} 385 386 ~AutoPopulate() { 387 if (StartSize == S.size()) 388 S.Add(St); 389 } 390 }; 391}; 392 393//===----------------------------------------------------------------------===// 394// ProgramStateManager - Factory object for ProgramStates. 395//===----------------------------------------------------------------------===// 396 397class ProgramStateManager { 398 friend class ProgramState; 399private: 400 /// Eng - The SubEngine that owns this state manager. 401 SubEngine *Eng; /* Can be null. */ 402 403 EnvironmentManager EnvMgr; 404 llvm::OwningPtr<StoreManager> StoreMgr; 405 llvm::OwningPtr<ConstraintManager> ConstraintMgr; 406 407 ProgramState::GenericDataMap::Factory GDMFactory; 408 409 typedef llvm::DenseMap<void*,std::pair<void*,void (*)(void*)> > GDMContextsTy; 410 GDMContextsTy GDMContexts; 411 412 /// StateSet - FoldingSet containing all the states created for analyzing 413 /// a particular function. This is used to unique states. 414 llvm::FoldingSet<ProgramState> StateSet; 415 416 /// Object that manages the data for all created SVals. 417 llvm::OwningPtr<SValBuilder> svalBuilder; 418 419 /// A BumpPtrAllocator to allocate states. 420 llvm::BumpPtrAllocator &Alloc; 421 422 /// A vector of recently allocated ProgramStates that can potentially be 423 /// reused. 424 std::vector<ProgramState *> recentlyAllocatedStates; 425 426 /// A vector of ProgramStates that we can reuse. 427 std::vector<ProgramState *> freeStates; 428 429public: 430 ProgramStateManager(ASTContext &Ctx, 431 StoreManagerCreator CreateStoreManager, 432 ConstraintManagerCreator CreateConstraintManager, 433 llvm::BumpPtrAllocator& alloc, 434 SubEngine &subeng) 435 : Eng(&subeng), 436 EnvMgr(alloc), 437 GDMFactory(alloc), 438 svalBuilder(createSimpleSValBuilder(alloc, Ctx, *this)), 439 Alloc(alloc) { 440 StoreMgr.reset((*CreateStoreManager)(*this)); 441 ConstraintMgr.reset((*CreateConstraintManager)(*this, subeng)); 442 } 443 444 ProgramStateManager(ASTContext &Ctx, 445 StoreManagerCreator CreateStoreManager, 446 ConstraintManager* ConstraintManagerPtr, 447 llvm::BumpPtrAllocator& alloc) 448 : Eng(0), 449 EnvMgr(alloc), 450 GDMFactory(alloc), 451 svalBuilder(createSimpleSValBuilder(alloc, Ctx, *this)), 452 Alloc(alloc) { 453 StoreMgr.reset((*CreateStoreManager)(*this)); 454 ConstraintMgr.reset(ConstraintManagerPtr); 455 } 456 457 ~ProgramStateManager(); 458 459 const ProgramState *getInitialState(const LocationContext *InitLoc); 460 461 ASTContext &getContext() { return svalBuilder->getContext(); } 462 const ASTContext &getContext() const { return svalBuilder->getContext(); } 463 464 BasicValueFactory &getBasicVals() { 465 return svalBuilder->getBasicValueFactory(); 466 } 467 const BasicValueFactory& getBasicVals() const { 468 return svalBuilder->getBasicValueFactory(); 469 } 470 471 SValBuilder &getSValBuilder() { 472 return *svalBuilder; 473 } 474 475 SymbolManager &getSymbolManager() { 476 return svalBuilder->getSymbolManager(); 477 } 478 const SymbolManager &getSymbolManager() const { 479 return svalBuilder->getSymbolManager(); 480 } 481 482 llvm::BumpPtrAllocator& getAllocator() { return Alloc; } 483 484 MemRegionManager& getRegionManager() { 485 return svalBuilder->getRegionManager(); 486 } 487 const MemRegionManager& getRegionManager() const { 488 return svalBuilder->getRegionManager(); 489 } 490 491 StoreManager& getStoreManager() { return *StoreMgr; } 492 ConstraintManager& getConstraintManager() { return *ConstraintMgr; } 493 SubEngine* getOwningEngine() { return Eng; } 494 495 const ProgramState *removeDeadBindings(const ProgramState *St, 496 const StackFrameContext *LCtx, 497 SymbolReaper& SymReaper); 498 499 /// Marshal a new state for the callee in another translation unit. 500 /// 'state' is owned by the caller's engine. 501 const ProgramState *MarshalState(const ProgramState *state, const StackFrameContext *L); 502 503public: 504 505 SVal ArrayToPointer(Loc Array) { 506 return StoreMgr->ArrayToPointer(Array); 507 } 508 509 // Methods that manipulate the GDM. 510 const ProgramState *addGDM(const ProgramState *St, void *Key, void *Data); 511 const ProgramState *removeGDM(const ProgramState *state, void *Key); 512 513 // Methods that query & manipulate the Store. 514 515 void iterBindings(const ProgramState *state, StoreManager::BindingsHandler& F) { 516 StoreMgr->iterBindings(state->getStore(), F); 517 } 518 519 const ProgramState *getPersistentState(ProgramState &Impl); 520 const ProgramState *getPersistentStateWithGDM(const ProgramState *FromState, 521 const ProgramState *GDMState); 522 523 bool haveEqualEnvironments(const ProgramState * S1, const ProgramState * S2) { 524 return S1->Env == S2->Env; 525 } 526 527 bool haveEqualStores(const ProgramState * S1, const ProgramState * S2) { 528 return S1->store == S2->store; 529 } 530 531 /// Periodically called by ExprEngine to recycle ProgramStates that were 532 /// created but never used for creating an ExplodedNode. 533 void recycleUnusedStates(); 534 535 //==---------------------------------------------------------------------==// 536 // Generic Data Map methods. 537 //==---------------------------------------------------------------------==// 538 // 539 // ProgramStateManager and ProgramState support a "generic data map" that allows 540 // different clients of ProgramState objects to embed arbitrary data within a 541 // ProgramState object. The generic data map is essentially an immutable map 542 // from a "tag" (that acts as the "key" for a client) and opaque values. 543 // Tags/keys and values are simply void* values. The typical way that clients 544 // generate unique tags are by taking the address of a static variable. 545 // Clients are responsible for ensuring that data values referred to by a 546 // the data pointer are immutable (and thus are essentially purely functional 547 // data). 548 // 549 // The templated methods below use the ProgramStateTrait<T> class 550 // to resolve keys into the GDM and to return data values to clients. 551 // 552 553 // Trait based GDM dispatch. 554 template <typename T> 555 const ProgramState *set(const ProgramState *st, typename ProgramStateTrait<T>::data_type D) { 556 return addGDM(st, ProgramStateTrait<T>::GDMIndex(), 557 ProgramStateTrait<T>::MakeVoidPtr(D)); 558 } 559 560 template<typename T> 561 const ProgramState *set(const ProgramState *st, 562 typename ProgramStateTrait<T>::key_type K, 563 typename ProgramStateTrait<T>::value_type V, 564 typename ProgramStateTrait<T>::context_type C) { 565 566 return addGDM(st, ProgramStateTrait<T>::GDMIndex(), 567 ProgramStateTrait<T>::MakeVoidPtr(ProgramStateTrait<T>::Set(st->get<T>(), K, V, C))); 568 } 569 570 template <typename T> 571 const ProgramState *add(const ProgramState *st, 572 typename ProgramStateTrait<T>::key_type K, 573 typename ProgramStateTrait<T>::context_type C) { 574 return addGDM(st, ProgramStateTrait<T>::GDMIndex(), 575 ProgramStateTrait<T>::MakeVoidPtr(ProgramStateTrait<T>::Add(st->get<T>(), K, C))); 576 } 577 578 template <typename T> 579 const ProgramState *remove(const ProgramState *st, 580 typename ProgramStateTrait<T>::key_type K, 581 typename ProgramStateTrait<T>::context_type C) { 582 583 return addGDM(st, ProgramStateTrait<T>::GDMIndex(), 584 ProgramStateTrait<T>::MakeVoidPtr(ProgramStateTrait<T>::Remove(st->get<T>(), K, C))); 585 } 586 587 template <typename T> 588 const ProgramState *remove(const ProgramState *st) { 589 return removeGDM(st, ProgramStateTrait<T>::GDMIndex()); 590 } 591 592 void *FindGDMContext(void *index, 593 void *(*CreateContext)(llvm::BumpPtrAllocator&), 594 void (*DeleteContext)(void*)); 595 596 template <typename T> 597 typename ProgramStateTrait<T>::context_type get_context() { 598 void *p = FindGDMContext(ProgramStateTrait<T>::GDMIndex(), 599 ProgramStateTrait<T>::CreateContext, 600 ProgramStateTrait<T>::DeleteContext); 601 602 return ProgramStateTrait<T>::MakeContext(p); 603 } 604 605 const llvm::APSInt* getSymVal(const ProgramState *St, SymbolRef sym) { 606 return ConstraintMgr->getSymVal(St, sym); 607 } 608 609 void EndPath(const ProgramState *St) { 610 ConstraintMgr->EndPath(St); 611 } 612}; 613 614 615//===----------------------------------------------------------------------===// 616// Out-of-line method definitions for ProgramState. 617//===----------------------------------------------------------------------===// 618 619inline const VarRegion* ProgramState::getRegion(const VarDecl *D, 620 const LocationContext *LC) const { 621 return getStateManager().getRegionManager().getVarRegion(D, LC); 622} 623 624inline const ProgramState *ProgramState::assume(DefinedOrUnknownSVal Cond, 625 bool Assumption) const { 626 if (Cond.isUnknown()) 627 return this; 628 629 return getStateManager().ConstraintMgr->assume(this, cast<DefinedSVal>(Cond), 630 Assumption); 631} 632 633inline std::pair<const ProgramState*, const ProgramState*> 634ProgramState::assume(DefinedOrUnknownSVal Cond) const { 635 if (Cond.isUnknown()) 636 return std::make_pair(this, this); 637 638 return getStateManager().ConstraintMgr->assumeDual(this, 639 cast<DefinedSVal>(Cond)); 640} 641 642inline const ProgramState *ProgramState::bindLoc(SVal LV, SVal V) const { 643 return !isa<Loc>(LV) ? this : bindLoc(cast<Loc>(LV), V); 644} 645 646inline Loc ProgramState::getLValue(const VarDecl *VD, 647 const LocationContext *LC) const { 648 return getStateManager().StoreMgr->getLValueVar(VD, LC); 649} 650 651inline Loc ProgramState::getLValue(const StringLiteral *literal) const { 652 return getStateManager().StoreMgr->getLValueString(literal); 653} 654 655inline Loc ProgramState::getLValue(const CompoundLiteralExpr *literal, 656 const LocationContext *LC) const { 657 return getStateManager().StoreMgr->getLValueCompoundLiteral(literal, LC); 658} 659 660inline SVal ProgramState::getLValue(const ObjCIvarDecl *D, SVal Base) const { 661 return getStateManager().StoreMgr->getLValueIvar(D, Base); 662} 663 664inline SVal ProgramState::getLValue(const FieldDecl *D, SVal Base) const { 665 return getStateManager().StoreMgr->getLValueField(D, Base); 666} 667 668inline SVal ProgramState::getLValue(QualType ElementType, SVal Idx, SVal Base) const{ 669 if (NonLoc *N = dyn_cast<NonLoc>(&Idx)) 670 return getStateManager().StoreMgr->getLValueElement(ElementType, *N, Base); 671 return UnknownVal(); 672} 673 674inline const llvm::APSInt *ProgramState::getSymVal(SymbolRef sym) const { 675 return getStateManager().getSymVal(this, sym); 676} 677 678inline SVal ProgramState::getSVal(const Stmt *Ex, bool useOnlyDirectBindings) const{ 679 return Env.getSVal(Ex, *getStateManager().svalBuilder, 680 useOnlyDirectBindings); 681} 682 683inline SVal ProgramState::getSValAsScalarOrLoc(const Stmt *S) const { 684 if (const Expr *Ex = dyn_cast<Expr>(S)) { 685 QualType T = Ex->getType(); 686 if (Ex->isLValue() || Loc::isLocType(T) || T->isIntegerType()) 687 return getSVal(S); 688 } 689 690 return UnknownVal(); 691} 692 693inline SVal ProgramState::getRawSVal(Loc LV, QualType T) const { 694 return getStateManager().StoreMgr->Retrieve(getStore(), LV, T); 695} 696 697inline SVal ProgramState::getSVal(const MemRegion* R) const { 698 return getStateManager().StoreMgr->Retrieve(getStore(), loc::MemRegionVal(R)); 699} 700 701inline BasicValueFactory &ProgramState::getBasicVals() const { 702 return getStateManager().getBasicVals(); 703} 704 705inline SymbolManager &ProgramState::getSymbolManager() const { 706 return getStateManager().getSymbolManager(); 707} 708 709template<typename T> 710const ProgramState *ProgramState::add(typename ProgramStateTrait<T>::key_type K) const { 711 return getStateManager().add<T>(this, K, get_context<T>()); 712} 713 714template <typename T> 715typename ProgramStateTrait<T>::context_type ProgramState::get_context() const { 716 return getStateManager().get_context<T>(); 717} 718 719template<typename T> 720const ProgramState *ProgramState::remove(typename ProgramStateTrait<T>::key_type K) const { 721 return getStateManager().remove<T>(this, K, get_context<T>()); 722} 723 724template<typename T> 725const ProgramState *ProgramState::remove(typename ProgramStateTrait<T>::key_type K, 726 typename ProgramStateTrait<T>::context_type C) const { 727 return getStateManager().remove<T>(this, K, C); 728} 729 730template <typename T> 731const ProgramState *ProgramState::remove() const { 732 return getStateManager().remove<T>(this); 733} 734 735template<typename T> 736const ProgramState *ProgramState::set(typename ProgramStateTrait<T>::data_type D) const { 737 return getStateManager().set<T>(this, D); 738} 739 740template<typename T> 741const ProgramState *ProgramState::set(typename ProgramStateTrait<T>::key_type K, 742 typename ProgramStateTrait<T>::value_type E) const { 743 return getStateManager().set<T>(this, K, E, get_context<T>()); 744} 745 746template<typename T> 747const ProgramState *ProgramState::set(typename ProgramStateTrait<T>::key_type K, 748 typename ProgramStateTrait<T>::value_type E, 749 typename ProgramStateTrait<T>::context_type C) const { 750 return getStateManager().set<T>(this, K, E, C); 751} 752 753template <typename CB> 754CB ProgramState::scanReachableSymbols(SVal val) const { 755 CB cb(this); 756 scanReachableSymbols(val, cb); 757 return cb; 758} 759 760template <typename CB> 761CB ProgramState::scanReachableSymbols(const SVal *beg, const SVal *end) const { 762 CB cb(this); 763 scanReachableSymbols(beg, end, cb); 764 return cb; 765} 766 767template <typename CB> 768CB ProgramState::scanReachableSymbols(const MemRegion * const *beg, 769 const MemRegion * const *end) const { 770 CB cb(this); 771 scanReachableSymbols(beg, end, cb); 772 return cb; 773} 774 775} // end GR namespace 776 777} // end clang namespace 778 779#endif 780