contrib/llvm/tools/clang/lib/StaticAnalyzer/Core/CheckerManager.cpp

   1 //===--- CheckerManager.cpp - Static Analyzer Checker Manager -------------===//
   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 // Defines the Static Analyzer Checker Manager.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "clang/StaticAnalyzer/Core/CheckerManager.h"
  15 #include "clang/StaticAnalyzer/Core/Checker.h"
  16 #include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
  17 #include "clang/StaticAnalyzer/Core/PathSensitive/ObjCMessage.h"
  18 #include "clang/Analysis/ProgramPoint.h"
  19 #include "clang/AST/DeclBase.h"
  20
  21 using namespace clang;
  22 using namespace ento;
  23
  24 bool CheckerManager::hasPathSensitiveCheckers() const {
  25   return !StmtCheckers.empty()              ||
  26          !PreObjCMessageCheckers.empty()    ||
  27          !PostObjCMessageCheckers.empty()   ||
  28          !LocationCheckers.empty()          ||
  29          !BindCheckers.empty()              ||
  30          !EndAnalysisCheckers.empty()       ||
  31          !EndPathCheckers.empty()           ||
  32          !BranchConditionCheckers.empty()   ||
  33          !LiveSymbolsCheckers.empty()       ||
  34          !DeadSymbolsCheckers.empty()       ||
  35          !RegionChangesCheckers.empty()     ||
  36          !EvalAssumeCheckers.empty()        ||
  37          !EvalCallCheckers.empty()          ||
  38          !InlineCallCheckers.empty();
  39 }
  40
  41 void CheckerManager::finishedCheckerRegistration() {
  42 #ifndef NDEBUG
  43   // Make sure that for every event that has listeners, there is at least
  44   // one dispatcher registered for it.
  45   for (llvm::DenseMap<EventTag, EventInfo>::iterator
  46          I = Events.begin(), E = Events.end(); I != E; ++I)
  47     assert(I->second.HasDispatcher && "No dispatcher registered for an event");
  48 #endif
  49 }
  50
  51 //===----------------------------------------------------------------------===//
  52 // Functions for running checkers for AST traversing..
  53 //===----------------------------------------------------------------------===//
  54
  55 void CheckerManager::runCheckersOnASTDecl(const Decl *D, AnalysisManager& mgr,
  56                                           BugReporter &BR) {
  57   assert(D);
  58
  59   unsigned DeclKind = D->getKind();
  60   CachedDeclCheckers *checkers = 0;
  61   CachedDeclCheckersMapTy::iterator CCI = CachedDeclCheckersMap.find(DeclKind);
  62   if (CCI != CachedDeclCheckersMap.end()) {
  63     checkers = &(CCI->second);
  64   } else {
  65     // Find the checkers that should run for this Decl and cache them.
  66     checkers = &CachedDeclCheckersMap[DeclKind];
  67     for (unsigned i = 0, e = DeclCheckers.size(); i != e; ++i) {
  68       DeclCheckerInfo &info = DeclCheckers[i];
  69       if (info.IsForDeclFn(D))
  70         checkers->push_back(info.CheckFn);
  71     }
  72   }
  73
  74   assert(checkers);
  75   for (CachedDeclCheckers::iterator
  76          I = checkers->begin(), E = checkers->end(); I != E; ++I)
  77     (*I)(D, mgr, BR);
  78 }
  79
  80 void CheckerManager::runCheckersOnASTBody(const Decl *D, AnalysisManager& mgr,
  81                                           BugReporter &BR) {
  82   assert(D && D->hasBody());
  83
  84   for (unsigned i = 0, e = BodyCheckers.size(); i != e; ++i)
  85     BodyCheckers[i](D, mgr, BR);
  86 }
  87
  88 //===----------------------------------------------------------------------===//
  89 // Functions for running checkers for path-sensitive checking.
  90 //===----------------------------------------------------------------------===//
  91
  92 template <typename CHECK_CTX>
  93 static void expandGraphWithCheckers(CHECK_CTX checkCtx,
  94                                     ExplodedNodeSet &Dst,
  95                                     const ExplodedNodeSet &Src) {
  96
  97   typename CHECK_CTX::CheckersTy::const_iterator
  98       I = checkCtx.checkers_begin(), E = checkCtx.checkers_end();
  99   if (I == E) {
 100     Dst.insert(Src);
 101     return;
 102   }
 103
 104   ExplodedNodeSet Tmp1, Tmp2;
 105   const ExplodedNodeSet *PrevSet = &Src;
 106
 107   for (; I != E; ++I) {
 108     ExplodedNodeSet *CurrSet = 0;
 109     if (I+1 == E)
 110       CurrSet = &Dst;
 111     else {
 112       CurrSet = (PrevSet == &Tmp1) ? &Tmp2 : &Tmp1;
 113       CurrSet->clear();
 114     }
 115
 116     for (ExplodedNodeSet::iterator NI = PrevSet->begin(), NE = PrevSet->end();
 117          NI != NE; ++NI)
 118       checkCtx.runChecker(*I, *CurrSet, *NI);
 119
 120     // Update which NodeSet is the current one.
 121     PrevSet = CurrSet;
 122   }
 123 }
 124
 125 namespace {
 126   struct CheckStmtContext {
 127     typedef SmallVectorImpl<CheckerManager::CheckStmtFunc> CheckersTy;
 128     bool IsPreVisit;
 129     const CheckersTy &Checkers;
 130     const Stmt *S;
 131     ExprEngine &Eng;
 132
 133     CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
 134     CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
 135
 136     CheckStmtContext(bool isPreVisit, const CheckersTy &checkers,
 137                      const Stmt *s, ExprEngine &eng)
 138       : IsPreVisit(isPreVisit), Checkers(checkers), S(s), Eng(eng) { }
 139
 140     void runChecker(CheckerManager::CheckStmtFunc checkFn,
 141                     ExplodedNodeSet &Dst, ExplodedNode *Pred) {
 142       // FIXME: Remove respondsToCallback from CheckerContext;
 143       ProgramPoint::Kind K =  IsPreVisit ? ProgramPoint::PreStmtKind :
 144                                            ProgramPoint::PostStmtKind;
 145       const ProgramPoint &L = ProgramPoint::getProgramPoint(S, K,
 146                                 Pred->getLocationContext(), checkFn.Checker);
 147       CheckerContext C(Dst, Eng.getBuilder(), Eng, Pred, L, 0);
 148
 149       checkFn(S, C);
 150     }
 151   };
 152 }
 153
 154 /// \brief Run checkers for visiting Stmts.
 155 void CheckerManager::runCheckersForStmt(bool isPreVisit,
 156                                         ExplodedNodeSet &Dst,
 157                                         const ExplodedNodeSet &Src,
 158                                         const Stmt *S,
 159                                         ExprEngine &Eng) {
 160   CheckStmtContext C(isPreVisit, *getCachedStmtCheckersFor(S, isPreVisit),
 161                      S, Eng);
 162   expandGraphWithCheckers(C, Dst, Src);
 163 }
 164
 165 namespace {
 166   struct CheckObjCMessageContext {
 167     typedef std::vector<CheckerManager::CheckObjCMessageFunc> CheckersTy;
 168     bool IsPreVisit;
 169     const CheckersTy &Checkers;
 170     const ObjCMessage &Msg;
 171     ExprEngine &Eng;
 172
 173     CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
 174     CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
 175
 176     CheckObjCMessageContext(bool isPreVisit, const CheckersTy &checkers,
 177                             const ObjCMessage &msg, ExprEngine &eng)
 178       : IsPreVisit(isPreVisit), Checkers(checkers), Msg(msg), Eng(eng) { }
 179
 180     void runChecker(CheckerManager::CheckObjCMessageFunc checkFn,
 181                     ExplodedNodeSet &Dst, ExplodedNode *Pred) {
 182       ProgramPoint::Kind K =  IsPreVisit ? ProgramPoint::PreStmtKind :
 183                                            ProgramPoint::PostStmtKind;
 184       const ProgramPoint &L = ProgramPoint::getProgramPoint(Msg.getOriginExpr(),
 185                                 K, Pred->getLocationContext(), checkFn.Checker);
 186       CheckerContext C(Dst, Eng.getBuilder(), Eng, Pred, L, 0);
 187
 188       checkFn(Msg, C);
 189     }
 190   };
 191 }
 192
 193 /// \brief Run checkers for visiting obj-c messages.
 194 void CheckerManager::runCheckersForObjCMessage(bool isPreVisit,
 195                                                ExplodedNodeSet &Dst,
 196                                                const ExplodedNodeSet &Src,
 197                                                const ObjCMessage &msg,
 198                                                ExprEngine &Eng) {
 199   CheckObjCMessageContext C(isPreVisit,
 200                             isPreVisit ? PreObjCMessageCheckers
 201                                        : PostObjCMessageCheckers,
 202                             msg, Eng);
 203   expandGraphWithCheckers(C, Dst, Src);
 204 }
 205
 206 namespace {
 207   struct CheckLocationContext {
 208     typedef std::vector<CheckerManager::CheckLocationFunc> CheckersTy;
 209     const CheckersTy &Checkers;
 210     SVal Loc;
 211     bool IsLoad;
 212     const Stmt *S;
 213     ExprEngine &Eng;
 214
 215     CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
 216     CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
 217
 218     CheckLocationContext(const CheckersTy &checkers,
 219                          SVal loc, bool isLoad, const Stmt *s, ExprEngine &eng)
 220       : Checkers(checkers), Loc(loc), IsLoad(isLoad), S(s), Eng(eng) { }
 221
 222     void runChecker(CheckerManager::CheckLocationFunc checkFn,
 223                     ExplodedNodeSet &Dst, ExplodedNode *Pred) {
 224       ProgramPoint::Kind K =  IsLoad ? ProgramPoint::PreLoadKind :
 225                                        ProgramPoint::PreStoreKind;
 226       const ProgramPoint &L = ProgramPoint::getProgramPoint(S, K,
 227                                 Pred->getLocationContext(), checkFn.Checker);
 228       CheckerContext C(Dst, Eng.getBuilder(), Eng, Pred, L, 0);
 229
 230       checkFn(Loc, IsLoad, S, C);
 231     }
 232   };
 233 }
 234
 235 /// \brief Run checkers for load/store of a location.
 236 void CheckerManager::runCheckersForLocation(ExplodedNodeSet &Dst,
 237                                             const ExplodedNodeSet &Src,
 238                                             SVal location, bool isLoad,
 239                                             const Stmt *S, ExprEngine &Eng) {
 240   CheckLocationContext C(LocationCheckers, location, isLoad, S, Eng);
 241   expandGraphWithCheckers(C, Dst, Src);
 242 }
 243
 244 namespace {
 245   struct CheckBindContext {
 246     typedef std::vector<CheckerManager::CheckBindFunc> CheckersTy;
 247     const CheckersTy &Checkers;
 248     SVal Loc;
 249     SVal Val;
 250     const Stmt *S;
 251     ExprEngine &Eng;
 252
 253     CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
 254     CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
 255
 256     CheckBindContext(const CheckersTy &checkers,
 257                      SVal loc, SVal val, const Stmt *s, ExprEngine &eng)
 258       : Checkers(checkers), Loc(loc), Val(val), S(s), Eng(eng) { }
 259
 260     void runChecker(CheckerManager::CheckBindFunc checkFn,
 261                     ExplodedNodeSet &Dst, ExplodedNode *Pred) {
 262       ProgramPoint::Kind K =  ProgramPoint::PreStmtKind;
 263       const ProgramPoint &L = ProgramPoint::getProgramPoint(S, K,
 264                                 Pred->getLocationContext(), checkFn.Checker);
 265       CheckerContext C(Dst, Eng.getBuilder(), Eng, Pred, L, 0);
 266
 267       checkFn(Loc, Val, S, C);
 268     }
 269   };
 270 }
 271
 272 /// \brief Run checkers for binding of a value to a location.
 273 void CheckerManager::runCheckersForBind(ExplodedNodeSet &Dst,
 274                                         const ExplodedNodeSet &Src,
 275                                         SVal location, SVal val,
 276                                         const Stmt *S, ExprEngine &Eng) {
 277   CheckBindContext C(BindCheckers, location, val, S, Eng);
 278   expandGraphWithCheckers(C, Dst, Src);
 279 }
 280
 281 void CheckerManager::runCheckersForEndAnalysis(ExplodedGraph &G,
 282                                                BugReporter &BR,
 283                                                ExprEngine &Eng) {
 284   for (unsigned i = 0, e = EndAnalysisCheckers.size(); i != e; ++i)
 285     EndAnalysisCheckers[i](G, BR, Eng);
 286 }
 287
 288 /// \brief Run checkers for end of path.
 289 void CheckerManager::runCheckersForEndPath(EndOfFunctionNodeBuilder &B,
 290                                            ExprEngine &Eng) {
 291   for (unsigned i = 0, e = EndPathCheckers.size(); i != e; ++i) {
 292     CheckEndPathFunc fn = EndPathCheckers[i];
 293     EndOfFunctionNodeBuilder specialB = B.withCheckerTag(fn.Checker);
 294     fn(specialB, Eng);
 295   }
 296 }
 297
 298 /// \brief Run checkers for branch condition.
 299 void CheckerManager::runCheckersForBranchCondition(const Stmt *condition,
 300                                                    BranchNodeBuilder &B,
 301                                                    ExprEngine &Eng) {
 302   for (unsigned i = 0, e = BranchConditionCheckers.size(); i != e; ++i) {
 303     CheckBranchConditionFunc fn = BranchConditionCheckers[i];
 304     fn(condition, B, Eng);
 305   }
 306 }
 307
 308 /// \brief Run checkers for live symbols.
 309 void CheckerManager::runCheckersForLiveSymbols(const ProgramState *state,
 310                                                SymbolReaper &SymReaper) {
 311   for (unsigned i = 0, e = LiveSymbolsCheckers.size(); i != e; ++i)
 312     LiveSymbolsCheckers[i](state, SymReaper);
 313 }
 314
 315 namespace {
 316   struct CheckDeadSymbolsContext {
 317     typedef std::vector<CheckerManager::CheckDeadSymbolsFunc> CheckersTy;
 318     const CheckersTy &Checkers;
 319     SymbolReaper &SR;
 320     const Stmt *S;
 321     ExprEngine &Eng;
 322
 323     CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
 324     CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
 325
 326     CheckDeadSymbolsContext(const CheckersTy &checkers, SymbolReaper &sr,
 327                             const Stmt *s, ExprEngine &eng)
 328       : Checkers(checkers), SR(sr), S(s), Eng(eng) { }
 329
 330     void runChecker(CheckerManager::CheckDeadSymbolsFunc checkFn,
 331                     ExplodedNodeSet &Dst, ExplodedNode *Pred) {
 332       ProgramPoint::Kind K = ProgramPoint::PostPurgeDeadSymbolsKind;
 333       const ProgramPoint &L = ProgramPoint::getProgramPoint(S, K,
 334                                 Pred->getLocationContext(), checkFn.Checker);
 335       CheckerContext C(Dst, Eng.getBuilder(), Eng, Pred, L, 0);
 336
 337       checkFn(SR, C);
 338     }
 339   };
 340 }
 341
 342 /// \brief Run checkers for dead symbols.
 343 void CheckerManager::runCheckersForDeadSymbols(ExplodedNodeSet &Dst,
 344                                                const ExplodedNodeSet &Src,
 345                                                SymbolReaper &SymReaper,
 346                                                const Stmt *S,
 347                                                ExprEngine &Eng) {
 348   CheckDeadSymbolsContext C(DeadSymbolsCheckers, SymReaper, S, Eng);
 349   expandGraphWithCheckers(C, Dst, Src);
 350 }
 351
 352 /// \brief True if at least one checker wants to check region changes.
 353 bool CheckerManager::wantsRegionChangeUpdate(const ProgramState *state) {
 354   for (unsigned i = 0, e = RegionChangesCheckers.size(); i != e; ++i)
 355     if (RegionChangesCheckers[i].WantUpdateFn(state))
 356       return true;
 357
 358   return false;
 359 }
 360
 361 /// \brief Run checkers for region changes.
 362 const ProgramState *
 363 CheckerManager::runCheckersForRegionChanges(const ProgramState *state,
 364                             const StoreManager::InvalidatedSymbols *invalidated,
 365                                     ArrayRef<const MemRegion *> ExplicitRegions,
 366                                           ArrayRef<const MemRegion *> Regions) {
 367   for (unsigned i = 0, e = RegionChangesCheckers.size(); i != e; ++i) {
 368     // If any checker declares the state infeasible (or if it starts that way),
 369     // bail out.
 370     if (!state)
 371       return NULL;
 372     state = RegionChangesCheckers[i].CheckFn(state, invalidated,
 373                                              ExplicitRegions, Regions);
 374   }
 375   return state;
 376 }
 377
 378 /// \brief Run checkers for handling assumptions on symbolic values.
 379 const ProgramState *
 380 CheckerManager::runCheckersForEvalAssume(const ProgramState *state,
 381                                          SVal Cond, bool Assumption) {
 382   for (unsigned i = 0, e = EvalAssumeCheckers.size(); i != e; ++i) {
 383     // If any checker declares the state infeasible (or if it starts that way),
 384     // bail out.
 385     if (!state)
 386       return NULL;
 387     state = EvalAssumeCheckers[i](state, Cond, Assumption);
 388   }
 389   return state;
 390 }
 391
 392 /// \brief Run checkers for evaluating a call.
 393 /// Only one checker will evaluate the call.
 394 void CheckerManager::runCheckersForEvalCall(ExplodedNodeSet &Dst,
 395                                             const ExplodedNodeSet &Src,
 396                                             const CallExpr *CE,
 397                                             ExprEngine &Eng,
 398                                             GraphExpander *defaultEval) {
 399   if (EvalCallCheckers.empty()   &&
 400       InlineCallCheckers.empty() &&
 401       defaultEval == 0) {
 402     Dst.insert(Src);
 403     return;
 404   }
 405
 406   for (ExplodedNodeSet::iterator
 407          NI = Src.begin(), NE = Src.end(); NI != NE; ++NI) {
 408
 409     ExplodedNode *Pred = *NI;
 410     bool anyEvaluated = false;
 411
 412     // First, check if any of the InlineCall callbacks can evaluate the call.
 413     assert(InlineCallCheckers.size() <= 1 &&
 414            "InlineCall is a special hacky callback to allow intrusive"
 415            "evaluation of the call (which simulates inlining). It is "
 416            "currently only used by OSAtomicChecker and should go away "
 417            "at some point.");
 418     for (std::vector<InlineCallFunc>::iterator
 419            EI = InlineCallCheckers.begin(), EE = InlineCallCheckers.end();
 420          EI != EE; ++EI) {
 421       ExplodedNodeSet checkDst;
 422       bool evaluated = (*EI)(CE, Eng, Pred, checkDst);
 423       assert(!(evaluated && anyEvaluated)
 424              && "There are more than one checkers evaluating the call");
 425       if (evaluated) {
 426         anyEvaluated = true;
 427         Dst.insert(checkDst);
 428 #ifdef NDEBUG
 429         break; // on release don't check that no other checker also evals.
 430 #endif
 431       }
 432     }
 433
 434 #ifdef NDEBUG // on release don't check that no other checker also evals.
 435     if (anyEvaluated) {
 436       break;
 437     }
 438 #endif
 439
 440     // Next, check if any of the EvalCall callbacks can evaluate the call.
 441     for (std::vector<EvalCallFunc>::iterator
 442            EI = EvalCallCheckers.begin(), EE = EvalCallCheckers.end();
 443          EI != EE; ++EI) {
 444       ExplodedNodeSet checkDst;
 445       ProgramPoint::Kind K = ProgramPoint::PostStmtKind;
 446       const ProgramPoint &L = ProgramPoint::getProgramPoint(CE, K,
 447                                 Pred->getLocationContext(), EI->Checker);
 448       bool evaluated = false;
 449       { // CheckerContext generates transitions(populates checkDest) on
 450         // destruction, so introduce the scope to make sure it gets properly
 451         // populated.
 452         CheckerContext C(checkDst, Eng.getBuilder(), Eng, Pred, L, 0);
 453         evaluated = (*EI)(CE, C);
 454       }
 455       assert(!(evaluated && anyEvaluated)
 456              && "There are more than one checkers evaluating the call");
 457       if (evaluated) {
 458         anyEvaluated = true;
 459         Dst.insert(checkDst);
 460 #ifdef NDEBUG
 461         break; // on release don't check that no other checker also evals.
 462 #endif
 463       }
 464     }
 465
 466     // If none of the checkers evaluated the call, ask ExprEngine to handle it.
 467     if (!anyEvaluated) {
 468       if (defaultEval)
 469         defaultEval->expandGraph(Dst, Pred);
 470       else
 471         Dst.insert(Pred);
 472     }
 473   }
 474 }
 475
 476 /// \brief Run checkers for the entire Translation Unit.
 477 void CheckerManager::runCheckersOnEndOfTranslationUnit(
 478                                                   const TranslationUnitDecl *TU,
 479                                                   AnalysisManager &mgr,
 480                                                   BugReporter &BR) {
 481   for (unsigned i = 0, e = EndOfTranslationUnitCheckers.size(); i != e; ++i)
 482     EndOfTranslationUnitCheckers[i](TU, mgr, BR);
 483 }
 484
 485 void CheckerManager::runCheckersForPrintState(raw_ostream &Out,
 486                                               const ProgramState *State,
 487                                               const char *NL, const char *Sep) {
 488   for (llvm::DenseMap<CheckerTag, CheckerRef>::iterator
 489         I = CheckerTags.begin(), E = CheckerTags.end(); I != E; ++I)
 490     I->second->printState(Out, State, NL, Sep);
 491 }
 492
 493 //===----------------------------------------------------------------------===//
 494 // Internal registration functions for AST traversing.
 495 //===----------------------------------------------------------------------===//
 496
 497 void CheckerManager::_registerForDecl(CheckDeclFunc checkfn,
 498                                       HandlesDeclFunc isForDeclFn) {
 499   DeclCheckerInfo info = { checkfn, isForDeclFn };
 500   DeclCheckers.push_back(info);
 501 }
 502
 503 void CheckerManager::_registerForBody(CheckDeclFunc checkfn) {
 504   BodyCheckers.push_back(checkfn);
 505 }
 506
 507 //===----------------------------------------------------------------------===//
 508 // Internal registration functions for path-sensitive checking.
 509 //===----------------------------------------------------------------------===//
 510
 511 void CheckerManager::_registerForPreStmt(CheckStmtFunc checkfn,
 512                                          HandlesStmtFunc isForStmtFn) {
 513   StmtCheckerInfo info = { checkfn, isForStmtFn, /*IsPreVisit*/true };
 514   StmtCheckers.push_back(info);
 515 }
 516 void CheckerManager::_registerForPostStmt(CheckStmtFunc checkfn,
 517                                           HandlesStmtFunc isForStmtFn) {
 518   StmtCheckerInfo info = { checkfn, isForStmtFn, /*IsPreVisit*/false };
 519   StmtCheckers.push_back(info);
 520 }
 521
 522 void CheckerManager::_registerForPreObjCMessage(CheckObjCMessageFunc checkfn) {
 523   PreObjCMessageCheckers.push_back(checkfn);
 524 }
 525 void CheckerManager::_registerForPostObjCMessage(CheckObjCMessageFunc checkfn) {
 526   PostObjCMessageCheckers.push_back(checkfn);
 527 }
 528
 529 void CheckerManager::_registerForLocation(CheckLocationFunc checkfn) {
 530   LocationCheckers.push_back(checkfn);
 531 }
 532
 533 void CheckerManager::_registerForBind(CheckBindFunc checkfn) {
 534   BindCheckers.push_back(checkfn);
 535 }
 536
 537 void CheckerManager::_registerForEndAnalysis(CheckEndAnalysisFunc checkfn) {
 538   EndAnalysisCheckers.push_back(checkfn);
 539 }
 540
 541 void CheckerManager::_registerForEndPath(CheckEndPathFunc checkfn) {
 542   EndPathCheckers.push_back(checkfn);
 543 }
 544
 545 void CheckerManager::_registerForBranchCondition(
 546                                              CheckBranchConditionFunc checkfn) {
 547   BranchConditionCheckers.push_back(checkfn);
 548 }
 549
 550 void CheckerManager::_registerForLiveSymbols(CheckLiveSymbolsFunc checkfn) {
 551   LiveSymbolsCheckers.push_back(checkfn);
 552 }
 553
 554 void CheckerManager::_registerForDeadSymbols(CheckDeadSymbolsFunc checkfn) {
 555   DeadSymbolsCheckers.push_back(checkfn);
 556 }
 557
 558 void CheckerManager::_registerForRegionChanges(CheckRegionChangesFunc checkfn,
 559                                      WantsRegionChangeUpdateFunc wantUpdateFn) {
 560   RegionChangesCheckerInfo info = {checkfn, wantUpdateFn};
 561   RegionChangesCheckers.push_back(info);
 562 }
 563
 564 void CheckerManager::_registerForEvalAssume(EvalAssumeFunc checkfn) {
 565   EvalAssumeCheckers.push_back(checkfn);
 566 }
 567
 568 void CheckerManager::_registerForEvalCall(EvalCallFunc checkfn) {
 569   EvalCallCheckers.push_back(checkfn);
 570 }
 571
 572 void CheckerManager::_registerForInlineCall(InlineCallFunc checkfn) {
 573   InlineCallCheckers.push_back(checkfn);
 574 }
 575
 576 void CheckerManager::_registerForEndOfTranslationUnit(
 577                                             CheckEndOfTranslationUnit checkfn) {
 578   EndOfTranslationUnitCheckers.push_back(checkfn);
 579 }
 580
 581 //===----------------------------------------------------------------------===//
 582 // Implementation details.
 583 //===----------------------------------------------------------------------===//
 584
 585 CheckerManager::CachedStmtCheckers *
 586 CheckerManager::getCachedStmtCheckersFor(const Stmt *S, bool isPreVisit) {
 587   assert(S);
 588
 589   CachedStmtCheckersKey key(S->getStmtClass(), isPreVisit);
 590   CachedStmtCheckers *checkers = 0;
 591   CachedStmtCheckersMapTy::iterator CCI = CachedStmtCheckersMap.find(key);
 592   if (CCI != CachedStmtCheckersMap.end()) {
 593     checkers = &(CCI->second);
 594   } else {
 595     // Find the checkers that should run for this Stmt and cache them.
 596     checkers = &CachedStmtCheckersMap[key];
 597     for (unsigned i = 0, e = StmtCheckers.size(); i != e; ++i) {
 598       StmtCheckerInfo &info = StmtCheckers[i];
 599       if (info.IsPreVisit == isPreVisit && info.IsForStmtFn(S))
 600         checkers->push_back(info.CheckFn);
 601     }
 602   }
 603
 604   assert(checkers);
 605   return checkers;
 606 }
 607
 608 CheckerManager::~CheckerManager() {
 609   for (unsigned i = 0, e = CheckerDtors.size(); i != e; ++i)
 610     CheckerDtors[i]();
 611 }
 612
 613 // Anchor for the vtable.
 614 GraphExpander::~GraphExpander() { }