CheckerManager.cpp revision bd613137499b1d4c3b63dccd0aa21f6add243f4f 
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
21using namespace clang;
22using namespace ento;
23
24bool 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
41void 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
55void 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
80void 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
92template <typename CHECK_CTX>
93static void expandGraphWithCheckers(CHECK_CTX checkCtx,
94                                    ExplodedNodeSet &Dst,
95                                    const ExplodedNodeSet &Src) {
96  const NodeBuilderContext &BldrCtx = checkCtx.Eng.getBuilderContext();
97  if (Src.empty())
98    return;
99
100  typename CHECK_CTX::CheckersTy::const_iterator
101      I = checkCtx.checkers_begin(), E = checkCtx.checkers_end();
102  if (I == E) {
103    Dst.insert(Src);
104    return;
105  }
106
107  ExplodedNodeSet Tmp1, Tmp2;
108  const ExplodedNodeSet *PrevSet = &Src;
109
110  for (; I != E; ++I) {
111    ExplodedNodeSet *CurrSet = 0;
112    if (I+1 == E)
113      CurrSet = &Dst;
114    else {
115      CurrSet = (PrevSet == &Tmp1) ? &Tmp2 : &Tmp1;
116      CurrSet->clear();
117    }
118
119    NodeBuilder B(*PrevSet, *CurrSet, BldrCtx);
120    for (ExplodedNodeSet::iterator NI = PrevSet->begin(), NE = PrevSet->end();
121         NI != NE; ++NI) {
122      checkCtx.runChecker(*I, B, *NI);
123    }
124
125    // If all the produced transitions are sinks, stop.
126    if (CurrSet->empty())
127      return;
128
129    // Update which NodeSet is the current one.
130    PrevSet = CurrSet;
131  }
132}
133
134namespace {
135  struct CheckStmtContext {
136    typedef SmallVectorImpl<CheckerManager::CheckStmtFunc> CheckersTy;
137    bool IsPreVisit;
138    const CheckersTy &Checkers;
139    const Stmt *S;
140    ExprEngine &Eng;
141    bool wasInlined;
142
143    CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
144    CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
145
146    CheckStmtContext(bool isPreVisit, const CheckersTy &checkers,
147                     const Stmt *s, ExprEngine &eng, bool wasInlined = false)
148      : IsPreVisit(isPreVisit), Checkers(checkers), S(s), Eng(eng),
149        wasInlined(wasInlined) {}
150
151    void runChecker(CheckerManager::CheckStmtFunc checkFn,
152                    NodeBuilder &Bldr, ExplodedNode *Pred) {
153      // FIXME: Remove respondsToCallback from CheckerContext;
154      ProgramPoint::Kind K =  IsPreVisit ? ProgramPoint::PreStmtKind :
155                                           ProgramPoint::PostStmtKind;
156      const ProgramPoint &L = ProgramPoint::getProgramPoint(S, K,
157                                Pred->getLocationContext(), checkFn.Checker);
158      CheckerContext C(Bldr, Eng, Pred, L, wasInlined);
159      checkFn(S, C);
160    }
161  };
162}
163
164/// \brief Run checkers for visiting Stmts.
165void CheckerManager::runCheckersForStmt(bool isPreVisit,
166                                        ExplodedNodeSet &Dst,
167                                        const ExplodedNodeSet &Src,
168                                        const Stmt *S,
169                                        ExprEngine &Eng,
170                                        bool wasInlined) {
171  CheckStmtContext C(isPreVisit, *getCachedStmtCheckersFor(S, isPreVisit),
172                     S, Eng, wasInlined);
173  expandGraphWithCheckers(C, Dst, Src);
174}
175
176namespace {
177  struct CheckObjCMessageContext {
178    typedef std::vector<CheckerManager::CheckObjCMessageFunc> CheckersTy;
179    bool IsPreVisit;
180    const CheckersTy &Checkers;
181    const ObjCMessage &Msg;
182    ExprEngine &Eng;
183
184    CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
185    CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
186
187    CheckObjCMessageContext(bool isPreVisit, const CheckersTy &checkers,
188                            const ObjCMessage &msg, ExprEngine &eng)
189      : IsPreVisit(isPreVisit), Checkers(checkers), Msg(msg), Eng(eng) { }
190
191    void runChecker(CheckerManager::CheckObjCMessageFunc checkFn,
192                    NodeBuilder &Bldr, ExplodedNode *Pred) {
193      ProgramPoint::Kind K =  IsPreVisit ? ProgramPoint::PreStmtKind :
194                                           ProgramPoint::PostStmtKind;
195      const ProgramPoint &L =
196        ProgramPoint::getProgramPoint(Msg.getMessageExpr(),
197                                      K, Pred->getLocationContext(),
198                                      checkFn.Checker);
199      CheckerContext C(Bldr, Eng, Pred, L);
200
201      checkFn(Msg, C);
202    }
203  };
204}
205
206/// \brief Run checkers for visiting obj-c messages.
207void CheckerManager::runCheckersForObjCMessage(bool isPreVisit,
208                                               ExplodedNodeSet &Dst,
209                                               const ExplodedNodeSet &Src,
210                                               const ObjCMessage &msg,
211                                               ExprEngine &Eng) {
212  CheckObjCMessageContext C(isPreVisit,
213                            isPreVisit ? PreObjCMessageCheckers
214                                       : PostObjCMessageCheckers,
215                            msg, Eng);
216  expandGraphWithCheckers(C, Dst, Src);
217}
218
219namespace {
220  struct CheckLocationContext {
221    typedef std::vector<CheckerManager::CheckLocationFunc> CheckersTy;
222    const CheckersTy &Checkers;
223    SVal Loc;
224    bool IsLoad;
225    const Stmt *NodeEx; /* Will become a CFGStmt */
226    const Stmt *BoundEx;
227    ExprEngine &Eng;
228
229    CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
230    CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
231
232    CheckLocationContext(const CheckersTy &checkers,
233                         SVal loc, bool isLoad, const Stmt *NodeEx,
234                         const Stmt *BoundEx,
235                         ExprEngine &eng)
236      : Checkers(checkers), Loc(loc), IsLoad(isLoad), NodeEx(NodeEx),
237        BoundEx(BoundEx), Eng(eng) {}
238
239    void runChecker(CheckerManager::CheckLocationFunc checkFn,
240                    NodeBuilder &Bldr, ExplodedNode *Pred) {
241      ProgramPoint::Kind K =  IsLoad ? ProgramPoint::PreLoadKind :
242                                       ProgramPoint::PreStoreKind;
243      const ProgramPoint &L =
244        ProgramPoint::getProgramPoint(NodeEx, K,
245                                      Pred->getLocationContext(),
246                                      checkFn.Checker);
247      CheckerContext C(Bldr, Eng, Pred, L);
248      checkFn(Loc, IsLoad, BoundEx, C);
249    }
250  };
251}
252
253/// \brief Run checkers for load/store of a location.
254
255void CheckerManager::runCheckersForLocation(ExplodedNodeSet &Dst,
256                                            const ExplodedNodeSet &Src,
257                                            SVal location, bool isLoad,
258                                            const Stmt *NodeEx,
259                                            const Stmt *BoundEx,
260                                            ExprEngine &Eng) {
261  CheckLocationContext C(LocationCheckers, location, isLoad, NodeEx,
262                         BoundEx, Eng);
263  expandGraphWithCheckers(C, Dst, Src);
264}
265
266namespace {
267  struct CheckBindContext {
268    typedef std::vector<CheckerManager::CheckBindFunc> CheckersTy;
269    const CheckersTy &Checkers;
270    SVal Loc;
271    SVal Val;
272    const Stmt *S;
273    ExprEngine &Eng;
274    ProgramPoint::Kind PointKind;
275
276    CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
277    CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
278
279    CheckBindContext(const CheckersTy &checkers,
280                     SVal loc, SVal val, const Stmt *s, ExprEngine &eng,
281                     ProgramPoint::Kind PK)
282      : Checkers(checkers), Loc(loc), Val(val), S(s), Eng(eng), PointKind(PK) {}
283
284    void runChecker(CheckerManager::CheckBindFunc checkFn,
285                    NodeBuilder &Bldr, ExplodedNode *Pred) {
286      const ProgramPoint &L = ProgramPoint::getProgramPoint(S, PointKind,
287                                Pred->getLocationContext(), checkFn.Checker);
288      CheckerContext C(Bldr, Eng, Pred, L);
289
290      checkFn(Loc, Val, S, C);
291    }
292  };
293}
294
295/// \brief Run checkers for binding of a value to a location.
296void CheckerManager::runCheckersForBind(ExplodedNodeSet &Dst,
297                                        const ExplodedNodeSet &Src,
298                                        SVal location, SVal val,
299                                        const Stmt *S, ExprEngine &Eng,
300                                        ProgramPoint::Kind PointKind) {
301  CheckBindContext C(BindCheckers, location, val, S, Eng, PointKind);
302  expandGraphWithCheckers(C, Dst, Src);
303}
304
305void CheckerManager::runCheckersForEndAnalysis(ExplodedGraph &G,
306                                               BugReporter &BR,
307                                               ExprEngine &Eng) {
308  for (unsigned i = 0, e = EndAnalysisCheckers.size(); i != e; ++i)
309    EndAnalysisCheckers[i](G, BR, Eng);
310}
311
312/// \brief Run checkers for end of path.
313// Note, We do not chain the checker output (like in expandGraphWithCheckers)
314// for this callback since end of path nodes are expected to be final.
315void CheckerManager::runCheckersForEndPath(NodeBuilderContext &BC,
316                                           ExplodedNodeSet &Dst,
317                                           ExprEngine &Eng) {
318  ExplodedNode *Pred = BC.Pred;
319
320  // We define the builder outside of the loop bacause if at least one checkers
321  // creates a sucsessor for Pred, we do not need to generate an
322  // autotransition for it.
323  NodeBuilder Bldr(Pred, Dst, BC);
324  for (unsigned i = 0, e = EndPathCheckers.size(); i != e; ++i) {
325    CheckEndPathFunc checkFn = EndPathCheckers[i];
326
327    const ProgramPoint &L = BlockEntrance(BC.Block,
328                                          Pred->getLocationContext(),
329                                          checkFn.Checker);
330    CheckerContext C(Bldr, Eng, Pred, L);
331    checkFn(C);
332  }
333}
334
335namespace {
336  struct CheckBranchConditionContext {
337    typedef std::vector<CheckerManager::CheckBranchConditionFunc> CheckersTy;
338    const CheckersTy &Checkers;
339    const Stmt *Condition;
340    ExprEngine &Eng;
341
342    CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
343    CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
344
345    CheckBranchConditionContext(const CheckersTy &checkers,
346                                const Stmt *Cond, ExprEngine &eng)
347      : Checkers(checkers), Condition(Cond), Eng(eng) {}
348
349    void runChecker(CheckerManager::CheckBranchConditionFunc checkFn,
350                    NodeBuilder &Bldr, ExplodedNode *Pred) {
351      ProgramPoint L = PostCondition(Condition, Pred->getLocationContext(),
352                                     checkFn.Checker);
353      CheckerContext C(Bldr, Eng, Pred, L);
354      checkFn(Condition, C);
355    }
356  };
357}
358
359/// \brief Run checkers for branch condition.
360void CheckerManager::runCheckersForBranchCondition(const Stmt *Condition,
361                                                   ExplodedNodeSet &Dst,
362                                                   ExplodedNode *Pred,
363                                                   ExprEngine &Eng) {
364  ExplodedNodeSet Src;
365  Src.insert(Pred);
366  CheckBranchConditionContext C(BranchConditionCheckers, Condition, Eng);
367  expandGraphWithCheckers(C, Dst, Src);
368}
369
370/// \brief Run checkers for live symbols.
371void CheckerManager::runCheckersForLiveSymbols(ProgramStateRef state,
372                                               SymbolReaper &SymReaper) {
373  for (unsigned i = 0, e = LiveSymbolsCheckers.size(); i != e; ++i)
374    LiveSymbolsCheckers[i](state, SymReaper);
375}
376
377namespace {
378  struct CheckDeadSymbolsContext {
379    typedef std::vector<CheckerManager::CheckDeadSymbolsFunc> CheckersTy;
380    const CheckersTy &Checkers;
381    SymbolReaper &SR;
382    const Stmt *S;
383    ExprEngine &Eng;
384
385    CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
386    CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
387
388    CheckDeadSymbolsContext(const CheckersTy &checkers, SymbolReaper &sr,
389                            const Stmt *s, ExprEngine &eng)
390      : Checkers(checkers), SR(sr), S(s), Eng(eng) { }
391
392    void runChecker(CheckerManager::CheckDeadSymbolsFunc checkFn,
393                    NodeBuilder &Bldr, ExplodedNode *Pred) {
394      ProgramPoint::Kind K = ProgramPoint::PostPurgeDeadSymbolsKind;
395      const ProgramPoint &L = ProgramPoint::getProgramPoint(S, K,
396                                Pred->getLocationContext(), checkFn.Checker);
397      CheckerContext C(Bldr, Eng, Pred, L);
398
399      checkFn(SR, C);
400    }
401  };
402}
403
404/// \brief Run checkers for dead symbols.
405void CheckerManager::runCheckersForDeadSymbols(ExplodedNodeSet &Dst,
406                                               const ExplodedNodeSet &Src,
407                                               SymbolReaper &SymReaper,
408                                               const Stmt *S,
409                                               ExprEngine &Eng) {
410  CheckDeadSymbolsContext C(DeadSymbolsCheckers, SymReaper, S, Eng);
411  expandGraphWithCheckers(C, Dst, Src);
412}
413
414/// \brief True if at least one checker wants to check region changes.
415bool CheckerManager::wantsRegionChangeUpdate(ProgramStateRef state) {
416  for (unsigned i = 0, e = RegionChangesCheckers.size(); i != e; ++i)
417    if (RegionChangesCheckers[i].WantUpdateFn(state))
418      return true;
419
420  return false;
421}
422
423/// \brief Run checkers for region changes.
424ProgramStateRef
425CheckerManager::runCheckersForRegionChanges(ProgramStateRef state,
426                            const StoreManager::InvalidatedSymbols *invalidated,
427                                    ArrayRef<const MemRegion *> ExplicitRegions,
428                                          ArrayRef<const MemRegion *> Regions,
429                                          const CallOrObjCMessage *Call) {
430  for (unsigned i = 0, e = RegionChangesCheckers.size(); i != e; ++i) {
431    // If any checker declares the state infeasible (or if it starts that way),
432    // bail out.
433    if (!state)
434      return NULL;
435    state = RegionChangesCheckers[i].CheckFn(state, invalidated,
436                                             ExplicitRegions, Regions, Call);
437  }
438  return state;
439}
440
441/// \brief Run checkers for handling assumptions on symbolic values.
442ProgramStateRef
443CheckerManager::runCheckersForEvalAssume(ProgramStateRef state,
444                                         SVal Cond, bool Assumption) {
445  for (unsigned i = 0, e = EvalAssumeCheckers.size(); i != e; ++i) {
446    // If any checker declares the state infeasible (or if it starts that way),
447    // bail out.
448    if (!state)
449      return NULL;
450    state = EvalAssumeCheckers[i](state, Cond, Assumption);
451  }
452  return state;
453}
454
455/// \brief Run checkers for evaluating a call.
456/// Only one checker will evaluate the call.
457void CheckerManager::runCheckersForEvalCall(ExplodedNodeSet &Dst,
458                                            const ExplodedNodeSet &Src,
459                                            const CallExpr *CE,
460                                            ExprEngine &Eng,
461                                            GraphExpander *defaultEval) {
462  if (EvalCallCheckers.empty()   &&
463      InlineCallCheckers.empty() &&
464      defaultEval == 0) {
465    Dst.insert(Src);
466    return;
467  }
468
469  for (ExplodedNodeSet::iterator
470         NI = Src.begin(), NE = Src.end(); NI != NE; ++NI) {
471
472    ExplodedNode *Pred = *NI;
473    bool anyEvaluated = false;
474
475    // First, check if any of the InlineCall callbacks can evaluate the call.
476    assert(InlineCallCheckers.size() <= 1 &&
477           "InlineCall is a special hacky callback to allow intrusive"
478           "evaluation of the call (which simulates inlining). It is "
479           "currently only used by OSAtomicChecker and should go away "
480           "at some point.");
481    for (std::vector<InlineCallFunc>::iterator
482           EI = InlineCallCheckers.begin(), EE = InlineCallCheckers.end();
483         EI != EE; ++EI) {
484      ExplodedNodeSet checkDst;
485      bool evaluated = (*EI)(CE, Eng, Pred, checkDst);
486      assert(!(evaluated && anyEvaluated)
487             && "There are more than one checkers evaluating the call");
488      if (evaluated) {
489        anyEvaluated = true;
490        Dst.insert(checkDst);
491#ifdef NDEBUG
492        break; // on release don't check that no other checker also evals.
493#endif
494      }
495    }
496
497#ifdef NDEBUG // on release don't check that no other checker also evals.
498    if (anyEvaluated) {
499      break;
500    }
501#endif
502
503    ExplodedNodeSet checkDst;
504    NodeBuilder B(Pred, checkDst, Eng.getBuilderContext());
505    // Next, check if any of the EvalCall callbacks can evaluate the call.
506    for (std::vector<EvalCallFunc>::iterator
507           EI = EvalCallCheckers.begin(), EE = EvalCallCheckers.end();
508         EI != EE; ++EI) {
509      ProgramPoint::Kind K = ProgramPoint::PostStmtKind;
510      const ProgramPoint &L = ProgramPoint::getProgramPoint(CE, K,
511                                Pred->getLocationContext(), EI->Checker);
512      bool evaluated = false;
513      { // CheckerContext generates transitions(populates checkDest) on
514        // destruction, so introduce the scope to make sure it gets properly
515        // populated.
516        CheckerContext C(B, Eng, Pred, L);
517        evaluated = (*EI)(CE, C);
518      }
519      assert(!(evaluated && anyEvaluated)
520             && "There are more than one checkers evaluating the call");
521      if (evaluated) {
522        anyEvaluated = true;
523        Dst.insert(checkDst);
524#ifdef NDEBUG
525        break; // on release don't check that no other checker also evals.
526#endif
527      }
528    }
529
530    // If none of the checkers evaluated the call, ask ExprEngine to handle it.
531    if (!anyEvaluated) {
532      if (defaultEval)
533        defaultEval->expandGraph(Dst, Pred);
534      else
535        Dst.insert(Pred);
536    }
537  }
538}
539
540/// \brief Run checkers for the entire Translation Unit.
541void CheckerManager::runCheckersOnEndOfTranslationUnit(
542                                                  const TranslationUnitDecl *TU,
543                                                  AnalysisManager &mgr,
544                                                  BugReporter &BR) {
545  for (unsigned i = 0, e = EndOfTranslationUnitCheckers.size(); i != e; ++i)
546    EndOfTranslationUnitCheckers[i](TU, mgr, BR);
547}
548
549void CheckerManager::runCheckersForPrintState(raw_ostream &Out,
550                                              ProgramStateRef State,
551                                              const char *NL, const char *Sep) {
552  for (llvm::DenseMap<CheckerTag, CheckerRef>::iterator
553        I = CheckerTags.begin(), E = CheckerTags.end(); I != E; ++I)
554    I->second->printState(Out, State, NL, Sep);
555}
556
557//===----------------------------------------------------------------------===//
558// Internal registration functions for AST traversing.
559//===----------------------------------------------------------------------===//
560
561void CheckerManager::_registerForDecl(CheckDeclFunc checkfn,
562                                      HandlesDeclFunc isForDeclFn) {
563  DeclCheckerInfo info = { checkfn, isForDeclFn };
564  DeclCheckers.push_back(info);
565}
566
567void CheckerManager::_registerForBody(CheckDeclFunc checkfn) {
568  BodyCheckers.push_back(checkfn);
569}
570
571//===----------------------------------------------------------------------===//
572// Internal registration functions for path-sensitive checking.
573//===----------------------------------------------------------------------===//
574
575void CheckerManager::_registerForPreStmt(CheckStmtFunc checkfn,
576                                         HandlesStmtFunc isForStmtFn) {
577  StmtCheckerInfo info = { checkfn, isForStmtFn, /*IsPreVisit*/true };
578  StmtCheckers.push_back(info);
579}
580void CheckerManager::_registerForPostStmt(CheckStmtFunc checkfn,
581                                          HandlesStmtFunc isForStmtFn) {
582  StmtCheckerInfo info = { checkfn, isForStmtFn, /*IsPreVisit*/false };
583  StmtCheckers.push_back(info);
584}
585
586void CheckerManager::_registerForPreObjCMessage(CheckObjCMessageFunc checkfn) {
587  PreObjCMessageCheckers.push_back(checkfn);
588}
589void CheckerManager::_registerForPostObjCMessage(CheckObjCMessageFunc checkfn) {
590  PostObjCMessageCheckers.push_back(checkfn);
591}
592
593void CheckerManager::_registerForLocation(CheckLocationFunc checkfn) {
594  LocationCheckers.push_back(checkfn);
595}
596
597void CheckerManager::_registerForBind(CheckBindFunc checkfn) {
598  BindCheckers.push_back(checkfn);
599}
600
601void CheckerManager::_registerForEndAnalysis(CheckEndAnalysisFunc checkfn) {
602  EndAnalysisCheckers.push_back(checkfn);
603}
604
605void CheckerManager::_registerForEndPath(CheckEndPathFunc checkfn) {
606  EndPathCheckers.push_back(checkfn);
607}
608
609void CheckerManager::_registerForBranchCondition(
610                                             CheckBranchConditionFunc checkfn) {
611  BranchConditionCheckers.push_back(checkfn);
612}
613
614void CheckerManager::_registerForLiveSymbols(CheckLiveSymbolsFunc checkfn) {
615  LiveSymbolsCheckers.push_back(checkfn);
616}
617
618void CheckerManager::_registerForDeadSymbols(CheckDeadSymbolsFunc checkfn) {
619  DeadSymbolsCheckers.push_back(checkfn);
620}
621
622void CheckerManager::_registerForRegionChanges(CheckRegionChangesFunc checkfn,
623                                     WantsRegionChangeUpdateFunc wantUpdateFn) {
624  RegionChangesCheckerInfo info = {checkfn, wantUpdateFn};
625  RegionChangesCheckers.push_back(info);
626}
627
628void CheckerManager::_registerForEvalAssume(EvalAssumeFunc checkfn) {
629  EvalAssumeCheckers.push_back(checkfn);
630}
631
632void CheckerManager::_registerForEvalCall(EvalCallFunc checkfn) {
633  EvalCallCheckers.push_back(checkfn);
634}
635
636void CheckerManager::_registerForInlineCall(InlineCallFunc checkfn) {
637  InlineCallCheckers.push_back(checkfn);
638}
639
640void CheckerManager::_registerForEndOfTranslationUnit(
641                                            CheckEndOfTranslationUnit checkfn) {
642  EndOfTranslationUnitCheckers.push_back(checkfn);
643}
644
645//===----------------------------------------------------------------------===//
646// Implementation details.
647//===----------------------------------------------------------------------===//
648
649CheckerManager::CachedStmtCheckers *
650CheckerManager::getCachedStmtCheckersFor(const Stmt *S, bool isPreVisit) {
651  assert(S);
652
653  CachedStmtCheckersKey key(S->getStmtClass(), isPreVisit);
654  CachedStmtCheckers *checkers = 0;
655  CachedStmtCheckersMapTy::iterator CCI = CachedStmtCheckersMap.find(key);
656  if (CCI != CachedStmtCheckersMap.end()) {
657    checkers = &(CCI->second);
658  } else {
659    // Find the checkers that should run for this Stmt and cache them.
660    checkers = &CachedStmtCheckersMap[key];
661    for (unsigned i = 0, e = StmtCheckers.size(); i != e; ++i) {
662      StmtCheckerInfo &info = StmtCheckers[i];
663      if (info.IsPreVisit == isPreVisit && info.IsForStmtFn(S))
664        checkers->push_back(info.CheckFn);
665    }
666  }
667
668  assert(checkers);
669  return checkers;
670}
671
672CheckerManager::~CheckerManager() {
673  for (unsigned i = 0, e = CheckerDtors.size(); i != e; ++i)
674    CheckerDtors[i]();
675}
676
677// Anchor for the vtable.
678GraphExpander::~GraphExpander() { }
679