CheckerManager.cpp revision 514f2c9dcb9e04b52929c5b141a6fe88bd68b33f 
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 *S;
226    ExprEngine &Eng;
227
228    CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
229    CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
230
231    CheckLocationContext(const CheckersTy &checkers,
232                         SVal loc, bool isLoad, const Stmt *s, ExprEngine &eng)
233      : Checkers(checkers), Loc(loc), IsLoad(isLoad), S(s), Eng(eng) { }
234
235    void runChecker(CheckerManager::CheckLocationFunc checkFn,
236                    NodeBuilder &Bldr, ExplodedNode *Pred) {
237      ProgramPoint::Kind K =  IsLoad ? ProgramPoint::PreLoadKind :
238                                       ProgramPoint::PreStoreKind;
239      const ProgramPoint &L = ProgramPoint::getProgramPoint(S, K,
240                                Pred->getLocationContext(), checkFn.Checker);
241      CheckerContext C(Bldr, Eng, Pred, L);
242
243      checkFn(Loc, IsLoad, S, C);
244    }
245  };
246}
247
248/// \brief Run checkers for load/store of a location.
249
250void CheckerManager::runCheckersForLocation(ExplodedNodeSet &Dst,
251                                            const ExplodedNodeSet &Src,
252                                            SVal location, bool isLoad,
253                                            const Stmt *S, ExprEngine &Eng) {
254  CheckLocationContext C(LocationCheckers, location, isLoad, S, Eng);
255  expandGraphWithCheckers(C, Dst, Src);
256}
257
258namespace {
259  struct CheckBindContext {
260    typedef std::vector<CheckerManager::CheckBindFunc> CheckersTy;
261    const CheckersTy &Checkers;
262    SVal Loc;
263    SVal Val;
264    const Stmt *S;
265    ExprEngine &Eng;
266    ProgramPoint::Kind PointKind;
267
268    CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
269    CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
270
271    CheckBindContext(const CheckersTy &checkers,
272                     SVal loc, SVal val, const Stmt *s, ExprEngine &eng,
273                     ProgramPoint::Kind PK)
274      : Checkers(checkers), Loc(loc), Val(val), S(s), Eng(eng), PointKind(PK) {}
275
276    void runChecker(CheckerManager::CheckBindFunc checkFn,
277                    NodeBuilder &Bldr, ExplodedNode *Pred) {
278      const ProgramPoint &L = ProgramPoint::getProgramPoint(S, PointKind,
279                                Pred->getLocationContext(), checkFn.Checker);
280      CheckerContext C(Bldr, Eng, Pred, L);
281
282      checkFn(Loc, Val, S, C);
283    }
284  };
285}
286
287/// \brief Run checkers for binding of a value to a location.
288void CheckerManager::runCheckersForBind(ExplodedNodeSet &Dst,
289                                        const ExplodedNodeSet &Src,
290                                        SVal location, SVal val,
291                                        const Stmt *S, ExprEngine &Eng,
292                                        ProgramPoint::Kind PointKind) {
293  CheckBindContext C(BindCheckers, location, val, S, Eng, PointKind);
294  expandGraphWithCheckers(C, Dst, Src);
295}
296
297void CheckerManager::runCheckersForEndAnalysis(ExplodedGraph &G,
298                                               BugReporter &BR,
299                                               ExprEngine &Eng) {
300  for (unsigned i = 0, e = EndAnalysisCheckers.size(); i != e; ++i)
301    EndAnalysisCheckers[i](G, BR, Eng);
302}
303
304/// \brief Run checkers for end of path.
305// Note, We do not chain the checker output (like in expandGraphWithCheckers)
306// for this callback since end of path nodes are expected to be final.
307void CheckerManager::runCheckersForEndPath(NodeBuilderContext &BC,
308                                           ExplodedNodeSet &Dst,
309                                           ExprEngine &Eng) {
310  ExplodedNode *Pred = BC.Pred;
311
312  // We define the builder outside of the loop bacause if at least one checkers
313  // creates a sucsessor for Pred, we do not need to generate an
314  // autotransition for it.
315  NodeBuilder Bldr(Pred, Dst, BC);
316  for (unsigned i = 0, e = EndPathCheckers.size(); i != e; ++i) {
317    CheckEndPathFunc checkFn = EndPathCheckers[i];
318
319    const ProgramPoint &L = BlockEntrance(BC.Block,
320                                          Pred->getLocationContext(),
321                                          checkFn.Checker);
322    CheckerContext C(Bldr, Eng, Pred, L);
323    checkFn(C);
324  }
325}
326
327namespace {
328  struct CheckBranchConditionContext {
329    typedef std::vector<CheckerManager::CheckBranchConditionFunc> CheckersTy;
330    const CheckersTy &Checkers;
331    const Stmt *Condition;
332    ExprEngine &Eng;
333
334    CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
335    CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
336
337    CheckBranchConditionContext(const CheckersTy &checkers,
338                                const Stmt *Cond, ExprEngine &eng)
339      : Checkers(checkers), Condition(Cond), Eng(eng) {}
340
341    void runChecker(CheckerManager::CheckBranchConditionFunc checkFn,
342                    NodeBuilder &Bldr, ExplodedNode *Pred) {
343      ProgramPoint L = PostCondition(Condition, Pred->getLocationContext(),
344                                     checkFn.Checker);
345      CheckerContext C(Bldr, Eng, Pred, L);
346      checkFn(Condition, C);
347    }
348  };
349}
350
351/// \brief Run checkers for branch condition.
352void CheckerManager::runCheckersForBranchCondition(const Stmt *Condition,
353                                                   ExplodedNodeSet &Dst,
354                                                   ExplodedNode *Pred,
355                                                   ExprEngine &Eng) {
356  ExplodedNodeSet Src;
357  Src.insert(Pred);
358  CheckBranchConditionContext C(BranchConditionCheckers, Condition, Eng);
359  expandGraphWithCheckers(C, Dst, Src);
360}
361
362/// \brief Run checkers for live symbols.
363void CheckerManager::runCheckersForLiveSymbols(ProgramStateRef state,
364                                               SymbolReaper &SymReaper) {
365  for (unsigned i = 0, e = LiveSymbolsCheckers.size(); i != e; ++i)
366    LiveSymbolsCheckers[i](state, SymReaper);
367}
368
369namespace {
370  struct CheckDeadSymbolsContext {
371    typedef std::vector<CheckerManager::CheckDeadSymbolsFunc> CheckersTy;
372    const CheckersTy &Checkers;
373    SymbolReaper &SR;
374    const Stmt *S;
375    ExprEngine &Eng;
376
377    CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
378    CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
379
380    CheckDeadSymbolsContext(const CheckersTy &checkers, SymbolReaper &sr,
381                            const Stmt *s, ExprEngine &eng)
382      : Checkers(checkers), SR(sr), S(s), Eng(eng) { }
383
384    void runChecker(CheckerManager::CheckDeadSymbolsFunc checkFn,
385                    NodeBuilder &Bldr, ExplodedNode *Pred) {
386      ProgramPoint::Kind K = ProgramPoint::PostPurgeDeadSymbolsKind;
387      const ProgramPoint &L = ProgramPoint::getProgramPoint(S, K,
388                                Pred->getLocationContext(), checkFn.Checker);
389      CheckerContext C(Bldr, Eng, Pred, L);
390
391      checkFn(SR, C);
392    }
393  };
394}
395
396/// \brief Run checkers for dead symbols.
397void CheckerManager::runCheckersForDeadSymbols(ExplodedNodeSet &Dst,
398                                               const ExplodedNodeSet &Src,
399                                               SymbolReaper &SymReaper,
400                                               const Stmt *S,
401                                               ExprEngine &Eng) {
402  CheckDeadSymbolsContext C(DeadSymbolsCheckers, SymReaper, S, Eng);
403  expandGraphWithCheckers(C, Dst, Src);
404}
405
406/// \brief True if at least one checker wants to check region changes.
407bool CheckerManager::wantsRegionChangeUpdate(ProgramStateRef state) {
408  for (unsigned i = 0, e = RegionChangesCheckers.size(); i != e; ++i)
409    if (RegionChangesCheckers[i].WantUpdateFn(state))
410      return true;
411
412  return false;
413}
414
415/// \brief Run checkers for region changes.
416ProgramStateRef
417CheckerManager::runCheckersForRegionChanges(ProgramStateRef state,
418                            const StoreManager::InvalidatedSymbols *invalidated,
419                                    ArrayRef<const MemRegion *> ExplicitRegions,
420                                          ArrayRef<const MemRegion *> Regions,
421                                          const CallOrObjCMessage *Call) {
422  for (unsigned i = 0, e = RegionChangesCheckers.size(); i != e; ++i) {
423    // If any checker declares the state infeasible (or if it starts that way),
424    // bail out.
425    if (!state)
426      return NULL;
427    state = RegionChangesCheckers[i].CheckFn(state, invalidated,
428                                             ExplicitRegions, Regions, Call);
429  }
430  return state;
431}
432
433/// \brief Run checkers for handling assumptions on symbolic values.
434ProgramStateRef
435CheckerManager::runCheckersForEvalAssume(ProgramStateRef state,
436                                         SVal Cond, bool Assumption) {
437  for (unsigned i = 0, e = EvalAssumeCheckers.size(); i != e; ++i) {
438    // If any checker declares the state infeasible (or if it starts that way),
439    // bail out.
440    if (!state)
441      return NULL;
442    state = EvalAssumeCheckers[i](state, Cond, Assumption);
443  }
444  return state;
445}
446
447/// \brief Run checkers for evaluating a call.
448/// Only one checker will evaluate the call.
449void CheckerManager::runCheckersForEvalCall(ExplodedNodeSet &Dst,
450                                            const ExplodedNodeSet &Src,
451                                            const CallExpr *CE,
452                                            ExprEngine &Eng,
453                                            GraphExpander *defaultEval) {
454  if (EvalCallCheckers.empty()   &&
455      InlineCallCheckers.empty() &&
456      defaultEval == 0) {
457    Dst.insert(Src);
458    return;
459  }
460
461  for (ExplodedNodeSet::iterator
462         NI = Src.begin(), NE = Src.end(); NI != NE; ++NI) {
463
464    ExplodedNode *Pred = *NI;
465    bool anyEvaluated = false;
466
467    // First, check if any of the InlineCall callbacks can evaluate the call.
468    assert(InlineCallCheckers.size() <= 1 &&
469           "InlineCall is a special hacky callback to allow intrusive"
470           "evaluation of the call (which simulates inlining). It is "
471           "currently only used by OSAtomicChecker and should go away "
472           "at some point.");
473    for (std::vector<InlineCallFunc>::iterator
474           EI = InlineCallCheckers.begin(), EE = InlineCallCheckers.end();
475         EI != EE; ++EI) {
476      ExplodedNodeSet checkDst;
477      bool evaluated = (*EI)(CE, Eng, Pred, checkDst);
478      assert(!(evaluated && anyEvaluated)
479             && "There are more than one checkers evaluating the call");
480      if (evaluated) {
481        anyEvaluated = true;
482        Dst.insert(checkDst);
483#ifdef NDEBUG
484        break; // on release don't check that no other checker also evals.
485#endif
486      }
487    }
488
489#ifdef NDEBUG // on release don't check that no other checker also evals.
490    if (anyEvaluated) {
491      break;
492    }
493#endif
494
495    ExplodedNodeSet checkDst;
496    NodeBuilder B(Pred, checkDst, Eng.getBuilderContext());
497    // Next, check if any of the EvalCall callbacks can evaluate the call.
498    for (std::vector<EvalCallFunc>::iterator
499           EI = EvalCallCheckers.begin(), EE = EvalCallCheckers.end();
500         EI != EE; ++EI) {
501      ProgramPoint::Kind K = ProgramPoint::PostStmtKind;
502      const ProgramPoint &L = ProgramPoint::getProgramPoint(CE, K,
503                                Pred->getLocationContext(), EI->Checker);
504      bool evaluated = false;
505      { // CheckerContext generates transitions(populates checkDest) on
506        // destruction, so introduce the scope to make sure it gets properly
507        // populated.
508        CheckerContext C(B, Eng, Pred, L);
509        evaluated = (*EI)(CE, C);
510      }
511      assert(!(evaluated && anyEvaluated)
512             && "There are more than one checkers evaluating the call");
513      if (evaluated) {
514        anyEvaluated = true;
515        Dst.insert(checkDst);
516#ifdef NDEBUG
517        break; // on release don't check that no other checker also evals.
518#endif
519      }
520    }
521
522    // If none of the checkers evaluated the call, ask ExprEngine to handle it.
523    if (!anyEvaluated) {
524      if (defaultEval)
525        defaultEval->expandGraph(Dst, Pred);
526      else
527        Dst.insert(Pred);
528    }
529  }
530}
531
532/// \brief Run checkers for the entire Translation Unit.
533void CheckerManager::runCheckersOnEndOfTranslationUnit(
534                                                  const TranslationUnitDecl *TU,
535                                                  AnalysisManager &mgr,
536                                                  BugReporter &BR) {
537  for (unsigned i = 0, e = EndOfTranslationUnitCheckers.size(); i != e; ++i)
538    EndOfTranslationUnitCheckers[i](TU, mgr, BR);
539}
540
541void CheckerManager::runCheckersForPrintState(raw_ostream &Out,
542                                              ProgramStateRef State,
543                                              const char *NL, const char *Sep) {
544  for (llvm::DenseMap<CheckerTag, CheckerRef>::iterator
545        I = CheckerTags.begin(), E = CheckerTags.end(); I != E; ++I)
546    I->second->printState(Out, State, NL, Sep);
547}
548
549//===----------------------------------------------------------------------===//
550// Internal registration functions for AST traversing.
551//===----------------------------------------------------------------------===//
552
553void CheckerManager::_registerForDecl(CheckDeclFunc checkfn,
554                                      HandlesDeclFunc isForDeclFn) {
555  DeclCheckerInfo info = { checkfn, isForDeclFn };
556  DeclCheckers.push_back(info);
557}
558
559void CheckerManager::_registerForBody(CheckDeclFunc checkfn) {
560  BodyCheckers.push_back(checkfn);
561}
562
563//===----------------------------------------------------------------------===//
564// Internal registration functions for path-sensitive checking.
565//===----------------------------------------------------------------------===//
566
567void CheckerManager::_registerForPreStmt(CheckStmtFunc checkfn,
568                                         HandlesStmtFunc isForStmtFn) {
569  StmtCheckerInfo info = { checkfn, isForStmtFn, /*IsPreVisit*/true };
570  StmtCheckers.push_back(info);
571}
572void CheckerManager::_registerForPostStmt(CheckStmtFunc checkfn,
573                                          HandlesStmtFunc isForStmtFn) {
574  StmtCheckerInfo info = { checkfn, isForStmtFn, /*IsPreVisit*/false };
575  StmtCheckers.push_back(info);
576}
577
578void CheckerManager::_registerForPreObjCMessage(CheckObjCMessageFunc checkfn) {
579  PreObjCMessageCheckers.push_back(checkfn);
580}
581void CheckerManager::_registerForPostObjCMessage(CheckObjCMessageFunc checkfn) {
582  PostObjCMessageCheckers.push_back(checkfn);
583}
584
585void CheckerManager::_registerForLocation(CheckLocationFunc checkfn) {
586  LocationCheckers.push_back(checkfn);
587}
588
589void CheckerManager::_registerForBind(CheckBindFunc checkfn) {
590  BindCheckers.push_back(checkfn);
591}
592
593void CheckerManager::_registerForEndAnalysis(CheckEndAnalysisFunc checkfn) {
594  EndAnalysisCheckers.push_back(checkfn);
595}
596
597void CheckerManager::_registerForEndPath(CheckEndPathFunc checkfn) {
598  EndPathCheckers.push_back(checkfn);
599}
600
601void CheckerManager::_registerForBranchCondition(
602                                             CheckBranchConditionFunc checkfn) {
603  BranchConditionCheckers.push_back(checkfn);
604}
605
606void CheckerManager::_registerForLiveSymbols(CheckLiveSymbolsFunc checkfn) {
607  LiveSymbolsCheckers.push_back(checkfn);
608}
609
610void CheckerManager::_registerForDeadSymbols(CheckDeadSymbolsFunc checkfn) {
611  DeadSymbolsCheckers.push_back(checkfn);
612}
613
614void CheckerManager::_registerForRegionChanges(CheckRegionChangesFunc checkfn,
615                                     WantsRegionChangeUpdateFunc wantUpdateFn) {
616  RegionChangesCheckerInfo info = {checkfn, wantUpdateFn};
617  RegionChangesCheckers.push_back(info);
618}
619
620void CheckerManager::_registerForEvalAssume(EvalAssumeFunc checkfn) {
621  EvalAssumeCheckers.push_back(checkfn);
622}
623
624void CheckerManager::_registerForEvalCall(EvalCallFunc checkfn) {
625  EvalCallCheckers.push_back(checkfn);
626}
627
628void CheckerManager::_registerForInlineCall(InlineCallFunc checkfn) {
629  InlineCallCheckers.push_back(checkfn);
630}
631
632void CheckerManager::_registerForEndOfTranslationUnit(
633                                            CheckEndOfTranslationUnit checkfn) {
634  EndOfTranslationUnitCheckers.push_back(checkfn);
635}
636
637//===----------------------------------------------------------------------===//
638// Implementation details.
639//===----------------------------------------------------------------------===//
640
641CheckerManager::CachedStmtCheckers *
642CheckerManager::getCachedStmtCheckersFor(const Stmt *S, bool isPreVisit) {
643  assert(S);
644
645  CachedStmtCheckersKey key(S->getStmtClass(), isPreVisit);
646  CachedStmtCheckers *checkers = 0;
647  CachedStmtCheckersMapTy::iterator CCI = CachedStmtCheckersMap.find(key);
648  if (CCI != CachedStmtCheckersMap.end()) {
649    checkers = &(CCI->second);
650  } else {
651    // Find the checkers that should run for this Stmt and cache them.
652    checkers = &CachedStmtCheckersMap[key];
653    for (unsigned i = 0, e = StmtCheckers.size(); i != e; ++i) {
654      StmtCheckerInfo &info = StmtCheckers[i];
655      if (info.IsPreVisit == isPreVisit && info.IsForStmtFn(S))
656        checkers->push_back(info.CheckFn);
657    }
658  }
659
660  assert(checkers);
661  return checkers;
662}
663
664CheckerManager::~CheckerManager() {
665  for (unsigned i = 0, e = CheckerDtors.size(); i != e; ++i)
666    CheckerDtors[i]();
667}
668
669// Anchor for the vtable.
670GraphExpander::~GraphExpander() { }
671