clang  7.0.0
CallEvent.cpp
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1 //===- CallEvent.cpp - Wrapper for all function and method calls ----------===//
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 /// \file This file defines CallEvent and its subclasses, which represent path-
11 /// sensitive instances of different kinds of function and method calls
12 /// (C, C++, and Objective-C).
13 //
14 //===----------------------------------------------------------------------===//
15 
17 #include "clang/AST/ASTContext.h"
18 #include "clang/AST/Decl.h"
19 #include "clang/AST/DeclBase.h"
20 #include "clang/AST/DeclCXX.h"
21 #include "clang/AST/DeclObjC.h"
22 #include "clang/AST/Expr.h"
23 #include "clang/AST/ExprCXX.h"
24 #include "clang/AST/ExprObjC.h"
25 #include "clang/AST/ParentMap.h"
26 #include "clang/AST/Stmt.h"
27 #include "clang/AST/Type.h"
29 #include "clang/Analysis/CFG.h"
34 #include "clang/Basic/LLVM.h"
37 #include "clang/Basic/Specifiers.h"
48 #include "llvm/ADT/ArrayRef.h"
49 #include "llvm/ADT/DenseMap.h"
50 #include "llvm/ADT/None.h"
51 #include "llvm/ADT/Optional.h"
52 #include "llvm/ADT/PointerIntPair.h"
53 #include "llvm/ADT/SmallSet.h"
54 #include "llvm/ADT/SmallVector.h"
55 #include "llvm/ADT/StringExtras.h"
56 #include "llvm/ADT/StringRef.h"
57 #include "llvm/Support/Casting.h"
58 #include "llvm/Support/Compiler.h"
59 #include "llvm/Support/Debug.h"
60 #include "llvm/Support/ErrorHandling.h"
61 #include "llvm/Support/raw_ostream.h"
62 #include <cassert>
63 #include <utility>
64 
65 #define DEBUG_TYPE "static-analyzer-call-event"
66 
67 using namespace clang;
68 using namespace ento;
69 
71  ASTContext &Ctx = getState()->getStateManager().getContext();
72  const Expr *E = getOriginExpr();
73  if (!E)
74  return Ctx.VoidTy;
75  assert(E);
76 
77  QualType ResultTy = E->getType();
78 
79  // A function that returns a reference to 'int' will have a result type
80  // of simply 'int'. Check the origin expr's value kind to recover the
81  // proper type.
82  switch (E->getValueKind()) {
83  case VK_LValue:
84  ResultTy = Ctx.getLValueReferenceType(ResultTy);
85  break;
86  case VK_XValue:
87  ResultTy = Ctx.getRValueReferenceType(ResultTy);
88  break;
89  case VK_RValue:
90  // No adjustment is necessary.
91  break;
92  }
93 
94  return ResultTy;
95 }
96 
97 static bool isCallback(QualType T) {
98  // If a parameter is a block or a callback, assume it can modify pointer.
99  if (T->isBlockPointerType() ||
100  T->isFunctionPointerType() ||
101  T->isObjCSelType())
102  return true;
103 
104  // Check if a callback is passed inside a struct (for both, struct passed by
105  // reference and by value). Dig just one level into the struct for now.
106 
107  if (T->isAnyPointerType() || T->isReferenceType())
108  T = T->getPointeeType();
109 
110  if (const RecordType *RT = T->getAsStructureType()) {
111  const RecordDecl *RD = RT->getDecl();
112  for (const auto *I : RD->fields()) {
113  QualType FieldT = I->getType();
114  if (FieldT->isBlockPointerType() || FieldT->isFunctionPointerType())
115  return true;
116  }
117  }
118  return false;
119 }
120 
122  if (const auto *PT = T->getAs<PointerType>()) {
123  QualType PointeeTy = PT->getPointeeType();
124  if (PointeeTy.isConstQualified())
125  return false;
126  return PointeeTy->isVoidType();
127  } else
128  return false;
129 }
130 
131 bool CallEvent::hasNonNullArgumentsWithType(bool (*Condition)(QualType)) const {
132  unsigned NumOfArgs = getNumArgs();
133 
134  // If calling using a function pointer, assume the function does not
135  // satisfy the callback.
136  // TODO: We could check the types of the arguments here.
137  if (!getDecl())
138  return false;
139 
140  unsigned Idx = 0;
142  E = param_type_end();
143  I != E && Idx < NumOfArgs; ++I, ++Idx) {
144  // If the parameter is 0, it's harmless.
145  if (getArgSVal(Idx).isZeroConstant())
146  continue;
147 
148  if (Condition(*I))
149  return true;
150  }
151  return false;
152 }
153 
156 }
157 
160 }
161 
162 bool CallEvent::isGlobalCFunction(StringRef FunctionName) const {
163  const auto *FD = dyn_cast_or_null<FunctionDecl>(getDecl());
164  if (!FD)
165  return false;
166 
167  return CheckerContext::isCLibraryFunction(FD, FunctionName);
168 }
169 
171  const Decl *D = getDecl();
172 
173  // If the callee is completely unknown, we cannot construct the stack frame.
174  if (!D)
175  return nullptr;
176 
177  // FIXME: Skip virtual functions for now. There's no easy procedure to foresee
178  // the exact decl that should be used, especially when it's not a definition.
179  if (const Decl *RD = getRuntimeDefinition().getDecl())
180  if (RD != D)
181  return nullptr;
182 
183  return LCtx->getAnalysisDeclContext()->getManager()->getContext(D);
184 }
185 
188  if (!ADC)
189  return nullptr;
190 
191  const Expr *E = getOriginExpr();
192  if (!E)
193  return nullptr;
194 
195  // Recover CFG block via reverse lookup.
196  // TODO: If we were to keep CFG element information as part of the CallEvent
197  // instead of doing this reverse lookup, we would be able to build the stack
198  // frame for non-expression-based calls, and also we wouldn't need the reverse
199  // lookup.
201  const CFGBlock *B = Map->getBlock(E);
202  assert(B);
203 
204  // Also recover CFG index by scanning the CFG block.
205  unsigned Idx = 0, Sz = B->size();
206  for (; Idx < Sz; ++Idx)
207  if (auto StmtElem = (*B)[Idx].getAs<CFGStmt>())
208  if (StmtElem->getStmt() == E)
209  break;
210  assert(Idx < Sz);
211 
212  return ADC->getManager()->getStackFrame(ADC, LCtx, E, B, Idx);
213 }
214 
215 const VarRegion *CallEvent::getParameterLocation(unsigned Index) const {
216  const StackFrameContext *SFC = getCalleeStackFrame();
217  // We cannot construct a VarRegion without a stack frame.
218  if (!SFC)
219  return nullptr;
220 
221  const ParmVarDecl *PVD = parameters()[Index];
222  const VarRegion *VR =
223  State->getStateManager().getRegionManager().getVarRegion(PVD, SFC);
224 
225  // This sanity check would fail if our parameter declaration doesn't
226  // correspond to the stack frame's function declaration.
227  assert(VR->getStackFrame() == SFC);
228 
229  return VR;
230 }
231 
232 /// Returns true if a type is a pointer-to-const or reference-to-const
233 /// with no further indirection.
234 static bool isPointerToConst(QualType Ty) {
235  QualType PointeeTy = Ty->getPointeeType();
236  if (PointeeTy == QualType())
237  return false;
238  if (!PointeeTy.isConstQualified())
239  return false;
240  if (PointeeTy->isAnyPointerType())
241  return false;
242  return true;
243 }
244 
245 // Try to retrieve the function declaration and find the function parameter
246 // types which are pointers/references to a non-pointer const.
247 // We will not invalidate the corresponding argument regions.
248 static void findPtrToConstParams(llvm::SmallSet<unsigned, 4> &PreserveArgs,
249  const CallEvent &Call) {
250  unsigned Idx = 0;
252  E = Call.param_type_end();
253  I != E; ++I, ++Idx) {
254  if (isPointerToConst(*I))
255  PreserveArgs.insert(Idx);
256  }
257 }
258 
260  ProgramStateRef Orig) const {
261  ProgramStateRef Result = (Orig ? Orig : getState());
262 
263  // Don't invalidate anything if the callee is marked pure/const.
264  if (const Decl *callee = getDecl())
265  if (callee->hasAttr<PureAttr>() || callee->hasAttr<ConstAttr>())
266  return Result;
267 
268  SmallVector<SVal, 8> ValuesToInvalidate;
270 
271  getExtraInvalidatedValues(ValuesToInvalidate, &ETraits);
272 
273  // Indexes of arguments whose values will be preserved by the call.
274  llvm::SmallSet<unsigned, 4> PreserveArgs;
275  if (!argumentsMayEscape())
276  findPtrToConstParams(PreserveArgs, *this);
277 
278  for (unsigned Idx = 0, Count = getNumArgs(); Idx != Count; ++Idx) {
279  // Mark this region for invalidation. We batch invalidate regions
280  // below for efficiency.
281  if (PreserveArgs.count(Idx))
282  if (const MemRegion *MR = getArgSVal(Idx).getAsRegion())
283  ETraits.setTrait(MR->getBaseRegion(),
285  // TODO: Factor this out + handle the lower level const pointers.
286 
287  ValuesToInvalidate.push_back(getArgSVal(Idx));
288  }
289 
290  // Invalidate designated regions using the batch invalidation API.
291  // NOTE: Even if RegionsToInvalidate is empty, we may still invalidate
292  // global variables.
293  return Result->invalidateRegions(ValuesToInvalidate, getOriginExpr(),
294  BlockCount, getLocationContext(),
295  /*CausedByPointerEscape*/ true,
296  /*Symbols=*/nullptr, this, &ETraits);
297 }
298 
300  const ProgramPointTag *Tag) const {
301  if (const Expr *E = getOriginExpr()) {
302  if (IsPreVisit)
303  return PreStmt(E, getLocationContext(), Tag);
304  return PostStmt(E, getLocationContext(), Tag);
305  }
306 
307  const Decl *D = getDecl();
308  assert(D && "Cannot get a program point without a statement or decl");
309 
311  if (IsPreVisit)
312  return PreImplicitCall(D, Loc, getLocationContext(), Tag);
313  return PostImplicitCall(D, Loc, getLocationContext(), Tag);
314 }
315 
316 bool CallEvent::isCalled(const CallDescription &CD) const {
317  // FIXME: Add ObjC Message support.
318  if (getKind() == CE_ObjCMessage)
319  return false;
320  if (!CD.IsLookupDone) {
321  CD.IsLookupDone = true;
322  CD.II = &getState()->getStateManager().getContext().Idents.get(CD.FuncName);
323  }
324  const IdentifierInfo *II = getCalleeIdentifier();
325  if (!II || II != CD.II)
326  return false;
327  return (CD.RequiredArgs == CallDescription::NoArgRequirement ||
328  CD.RequiredArgs == getNumArgs());
329 }
330 
331 SVal CallEvent::getArgSVal(unsigned Index) const {
332  const Expr *ArgE = getArgExpr(Index);
333  if (!ArgE)
334  return UnknownVal();
335  return getSVal(ArgE);
336 }
337 
339  const Expr *ArgE = getArgExpr(Index);
340  if (!ArgE)
341  return {};
342  return ArgE->getSourceRange();
343 }
344 
346  const Expr *E = getOriginExpr();
347  if (!E)
348  return UndefinedVal();
349  return getSVal(E);
350 }
351 
352 LLVM_DUMP_METHOD void CallEvent::dump() const { dump(llvm::errs()); }
353 
354 void CallEvent::dump(raw_ostream &Out) const {
355  ASTContext &Ctx = getState()->getStateManager().getContext();
356  if (const Expr *E = getOriginExpr()) {
357  E->printPretty(Out, nullptr, Ctx.getPrintingPolicy());
358  Out << "\n";
359  return;
360  }
361 
362  if (const Decl *D = getDecl()) {
363  Out << "Call to ";
364  D->print(Out, Ctx.getPrintingPolicy());
365  return;
366  }
367 
368  // FIXME: a string representation of the kind would be nice.
369  Out << "Unknown call (type " << getKind() << ")";
370 }
371 
372 bool CallEvent::isCallStmt(const Stmt *S) {
373  return isa<CallExpr>(S) || isa<ObjCMessageExpr>(S)
374  || isa<CXXConstructExpr>(S)
375  || isa<CXXNewExpr>(S);
376 }
377 
379  assert(D);
380  if (const auto *FD = dyn_cast<FunctionDecl>(D))
381  return FD->getReturnType();
382  if (const auto *MD = dyn_cast<ObjCMethodDecl>(D))
383  return MD->getReturnType();
384  if (const auto *BD = dyn_cast<BlockDecl>(D)) {
385  // Blocks are difficult because the return type may not be stored in the
386  // BlockDecl itself. The AST should probably be enhanced, but for now we
387  // just do what we can.
388  // If the block is declared without an explicit argument list, the
389  // signature-as-written just includes the return type, not the entire
390  // function type.
391  // FIXME: All blocks should have signatures-as-written, even if the return
392  // type is inferred. (That's signified with a dependent result type.)
393  if (const TypeSourceInfo *TSI = BD->getSignatureAsWritten()) {
394  QualType Ty = TSI->getType();
395  if (const FunctionType *FT = Ty->getAs<FunctionType>())
396  Ty = FT->getReturnType();
397  if (!Ty->isDependentType())
398  return Ty;
399  }
400 
401  return {};
402  }
403 
404  llvm_unreachable("unknown callable kind");
405 }
406 
407 bool CallEvent::isVariadic(const Decl *D) {
408  assert(D);
409 
410  if (const auto *FD = dyn_cast<FunctionDecl>(D))
411  return FD->isVariadic();
412  if (const auto *MD = dyn_cast<ObjCMethodDecl>(D))
413  return MD->isVariadic();
414  if (const auto *BD = dyn_cast<BlockDecl>(D))
415  return BD->isVariadic();
416 
417  llvm_unreachable("unknown callable kind");
418 }
419 
420 static void addParameterValuesToBindings(const StackFrameContext *CalleeCtx,
421  CallEvent::BindingsTy &Bindings,
422  SValBuilder &SVB,
423  const CallEvent &Call,
425  MemRegionManager &MRMgr = SVB.getRegionManager();
426 
427  // If the function has fewer parameters than the call has arguments, we simply
428  // do not bind any values to them.
429  unsigned NumArgs = Call.getNumArgs();
430  unsigned Idx = 0;
431  ArrayRef<ParmVarDecl*>::iterator I = parameters.begin(), E = parameters.end();
432  for (; I != E && Idx < NumArgs; ++I, ++Idx) {
433  const ParmVarDecl *ParamDecl = *I;
434  assert(ParamDecl && "Formal parameter has no decl?");
435 
436  SVal ArgVal = Call.getArgSVal(Idx);
437  if (!ArgVal.isUnknown()) {
438  Loc ParamLoc = SVB.makeLoc(MRMgr.getVarRegion(ParamDecl, CalleeCtx));
439  Bindings.push_back(std::make_pair(ParamLoc, ArgVal));
440  }
441  }
442 
443  // FIXME: Variadic arguments are not handled at all right now.
444 }
445 
447  const FunctionDecl *D = getDecl();
448  if (!D)
449  return None;
450  return D->parameters();
451 }
452 
454  const FunctionDecl *FD = getDecl();
455  if (!FD)
456  return {};
457 
458  // Note that the AnalysisDeclContext will have the FunctionDecl with
459  // the definition (if one exists).
460  AnalysisDeclContext *AD =
462  getManager()->getContext(FD);
463  bool IsAutosynthesized;
464  Stmt* Body = AD->getBody(IsAutosynthesized);
465  LLVM_DEBUG({
466  if (IsAutosynthesized)
467  llvm::dbgs() << "Using autosynthesized body for " << FD->getName()
468  << "\n";
469  });
470  if (Body) {
471  const Decl* Decl = AD->getDecl();
472  return RuntimeDefinition(Decl);
473  }
474 
475  SubEngine *Engine = getState()->getStateManager().getOwningEngine();
476  AnalyzerOptions &Opts = Engine->getAnalysisManager().options;
477 
478  // Try to get CTU definition only if CTUDir is provided.
479  if (!Opts.naiveCTUEnabled())
480  return {};
481 
484  llvm::Expected<const FunctionDecl *> CTUDeclOrError =
485  CTUCtx.getCrossTUDefinition(FD, Opts.getCTUDir(), Opts.getCTUIndexName());
486 
487  if (!CTUDeclOrError) {
488  handleAllErrors(CTUDeclOrError.takeError(),
489  [&](const cross_tu::IndexError &IE) {
490  CTUCtx.emitCrossTUDiagnostics(IE);
491  });
492  return {};
493  }
494 
495  return RuntimeDefinition(*CTUDeclOrError);
496 }
497 
499  const StackFrameContext *CalleeCtx,
500  BindingsTy &Bindings) const {
501  const auto *D = cast<FunctionDecl>(CalleeCtx->getDecl());
502  SValBuilder &SVB = getState()->getStateManager().getSValBuilder();
503  addParameterValuesToBindings(CalleeCtx, Bindings, SVB, *this,
504  D->parameters());
505 }
506 
509  return true;
510 
511  const FunctionDecl *D = getDecl();
512  if (!D)
513  return true;
514 
515  const IdentifierInfo *II = D->getIdentifier();
516  if (!II)
517  return false;
518 
519  // This set of "escaping" APIs is
520 
521  // - 'int pthread_setspecific(ptheread_key k, const void *)' stores a
522  // value into thread local storage. The value can later be retrieved with
523  // 'void *ptheread_getspecific(pthread_key)'. So even thought the
524  // parameter is 'const void *', the region escapes through the call.
525  if (II->isStr("pthread_setspecific"))
526  return true;
527 
528  // - xpc_connection_set_context stores a value which can be retrieved later
529  // with xpc_connection_get_context.
530  if (II->isStr("xpc_connection_set_context"))
531  return true;
532 
533  // - funopen - sets a buffer for future IO calls.
534  if (II->isStr("funopen"))
535  return true;
536 
537  // - __cxa_demangle - can reallocate memory and can return the pointer to
538  // the input buffer.
539  if (II->isStr("__cxa_demangle"))
540  return true;
541 
542  StringRef FName = II->getName();
543 
544  // - CoreFoundation functions that end with "NoCopy" can free a passed-in
545  // buffer even if it is const.
546  if (FName.endswith("NoCopy"))
547  return true;
548 
549  // - NSXXInsertXX, for example NSMapInsertIfAbsent, since they can
550  // be deallocated by NSMapRemove.
551  if (FName.startswith("NS") && (FName.find("Insert") != StringRef::npos))
552  return true;
553 
554  // - Many CF containers allow objects to escape through custom
555  // allocators/deallocators upon container construction. (PR12101)
556  if (FName.startswith("CF") || FName.startswith("CG")) {
557  return StrInStrNoCase(FName, "InsertValue") != StringRef::npos ||
558  StrInStrNoCase(FName, "AddValue") != StringRef::npos ||
559  StrInStrNoCase(FName, "SetValue") != StringRef::npos ||
560  StrInStrNoCase(FName, "WithData") != StringRef::npos ||
561  StrInStrNoCase(FName, "AppendValue") != StringRef::npos ||
562  StrInStrNoCase(FName, "SetAttribute") != StringRef::npos;
563  }
564 
565  return false;
566 }
567 
569  const FunctionDecl *D = getOriginExpr()->getDirectCallee();
570  if (D)
571  return D;
572 
573  return getSVal(getOriginExpr()->getCallee()).getAsFunctionDecl();
574 }
575 
577  const auto *CE = cast_or_null<CallExpr>(getOriginExpr());
578  if (!CE)
579  return AnyFunctionCall::getDecl();
580 
581  const FunctionDecl *D = CE->getDirectCallee();
582  if (D)
583  return D;
584 
585  return getSVal(CE->getCallee()).getAsFunctionDecl();
586 }
587 
589  ValueList &Values, RegionAndSymbolInvalidationTraits *ETraits) const {
590  SVal ThisVal = getCXXThisVal();
591  Values.push_back(ThisVal);
592 
593  // Don't invalidate if the method is const and there are no mutable fields.
594  if (const auto *D = cast_or_null<CXXMethodDecl>(getDecl())) {
595  if (!D->isConst())
596  return;
597  // Get the record decl for the class of 'This'. D->getParent() may return a
598  // base class decl, rather than the class of the instance which needs to be
599  // checked for mutable fields.
600  // TODO: We might as well look at the dynamic type of the object.
601  const Expr *Ex = getCXXThisExpr()->ignoreParenBaseCasts();
602  QualType T = Ex->getType();
603  if (T->isPointerType()) // Arrow or implicit-this syntax?
604  T = T->getPointeeType();
605  const CXXRecordDecl *ParentRecord = T->getAsCXXRecordDecl();
606  assert(ParentRecord);
607  if (ParentRecord->hasMutableFields())
608  return;
609  // Preserve CXXThis.
610  const MemRegion *ThisRegion = ThisVal.getAsRegion();
611  if (!ThisRegion)
612  return;
613 
614  ETraits->setTrait(ThisRegion->getBaseRegion(),
616  }
617 }
618 
620  const Expr *Base = getCXXThisExpr();
621  // FIXME: This doesn't handle an overloaded ->* operator.
622  if (!Base)
623  return UnknownVal();
624 
625  SVal ThisVal = getSVal(Base);
626  assert(ThisVal.isUnknownOrUndef() || ThisVal.getAs<Loc>());
627  return ThisVal;
628 }
629 
631  // Do we have a decl at all?
632  const Decl *D = getDecl();
633  if (!D)
634  return {};
635 
636  // If the method is non-virtual, we know we can inline it.
637  const auto *MD = cast<CXXMethodDecl>(D);
638  if (!MD->isVirtual())
640 
641  // Do we know the implicit 'this' object being called?
642  const MemRegion *R = getCXXThisVal().getAsRegion();
643  if (!R)
644  return {};
645 
646  // Do we know anything about the type of 'this'?
648  if (!DynType.isValid())
649  return {};
650 
651  // Is the type a C++ class? (This is mostly a defensive check.)
652  QualType RegionType = DynType.getType()->getPointeeType();
653  assert(!RegionType.isNull() && "DynamicTypeInfo should always be a pointer.");
654 
655  const CXXRecordDecl *RD = RegionType->getAsCXXRecordDecl();
656  if (!RD || !RD->hasDefinition())
657  return {};
658 
659  // Find the decl for this method in that class.
660  const CXXMethodDecl *Result = MD->getCorrespondingMethodInClass(RD, true);
661  if (!Result) {
662  // We might not even get the original statically-resolved method due to
663  // some particularly nasty casting (e.g. casts to sister classes).
664  // However, we should at least be able to search up and down our own class
665  // hierarchy, and some real bugs have been caught by checking this.
666  assert(!RD->isDerivedFrom(MD->getParent()) && "Couldn't find known method");
667 
668  // FIXME: This is checking that our DynamicTypeInfo is at least as good as
669  // the static type. However, because we currently don't update
670  // DynamicTypeInfo when an object is cast, we can't actually be sure the
671  // DynamicTypeInfo is up to date. This assert should be re-enabled once
672  // this is fixed. <rdar://problem/12287087>
673  //assert(!MD->getParent()->isDerivedFrom(RD) && "Bad DynamicTypeInfo");
674 
675  return {};
676  }
677 
678  // Does the decl that we found have an implementation?
679  const FunctionDecl *Definition;
680  if (!Result->hasBody(Definition))
681  return {};
682 
683  // We found a definition. If we're not sure that this devirtualization is
684  // actually what will happen at runtime, make sure to provide the region so
685  // that ExprEngine can decide what to do with it.
686  if (DynType.canBeASubClass())
687  return RuntimeDefinition(Definition, R->StripCasts());
688  return RuntimeDefinition(Definition, /*DispatchRegion=*/nullptr);
689 }
690 
692  const StackFrameContext *CalleeCtx,
693  BindingsTy &Bindings) const {
695 
696  // Handle the binding of 'this' in the new stack frame.
697  SVal ThisVal = getCXXThisVal();
698  if (!ThisVal.isUnknown()) {
699  ProgramStateManager &StateMgr = getState()->getStateManager();
700  SValBuilder &SVB = StateMgr.getSValBuilder();
701 
702  const auto *MD = cast<CXXMethodDecl>(CalleeCtx->getDecl());
703  Loc ThisLoc = SVB.getCXXThis(MD, CalleeCtx);
704 
705  // If we devirtualized to a different member function, we need to make sure
706  // we have the proper layering of CXXBaseObjectRegions.
707  if (MD->getCanonicalDecl() != getDecl()->getCanonicalDecl()) {
708  ASTContext &Ctx = SVB.getContext();
709  const CXXRecordDecl *Class = MD->getParent();
710  QualType Ty = Ctx.getPointerType(Ctx.getRecordType(Class));
711 
712  // FIXME: CallEvent maybe shouldn't be directly accessing StoreManager.
713  bool Failed;
714  ThisVal = StateMgr.getStoreManager().attemptDownCast(ThisVal, Ty, Failed);
715  if (Failed) {
716  // We might have suffered some sort of placement new earlier, so
717  // we're constructing in a completely unexpected storage.
718  // Fall back to a generic pointer cast for this-value.
719  const CXXMethodDecl *StaticMD = cast<CXXMethodDecl>(getDecl());
720  const CXXRecordDecl *StaticClass = StaticMD->getParent();
721  QualType StaticTy = Ctx.getPointerType(Ctx.getRecordType(StaticClass));
722  ThisVal = SVB.evalCast(ThisVal, Ty, StaticTy);
723  }
724  }
725 
726  if (!ThisVal.isUnknown())
727  Bindings.push_back(std::make_pair(ThisLoc, ThisVal));
728  }
729 }
730 
732  return getOriginExpr()->getImplicitObjectArgument();
733 }
734 
736  // C++11 [expr.call]p1: ...If the selected function is non-virtual, or if the
737  // id-expression in the class member access expression is a qualified-id,
738  // that function is called. Otherwise, its final overrider in the dynamic type
739  // of the object expression is called.
740  if (const auto *ME = dyn_cast<MemberExpr>(getOriginExpr()->getCallee()))
741  if (ME->hasQualifier())
743 
745 }
746 
748  return getOriginExpr()->getArg(0);
749 }
750 
752  const Expr *Callee = getOriginExpr()->getCallee();
753  const MemRegion *DataReg = getSVal(Callee).getAsRegion();
754 
755  return dyn_cast_or_null<BlockDataRegion>(DataReg);
756 }
757 
759  const BlockDecl *D = getDecl();
760  if (!D)
761  return nullptr;
762  return D->parameters();
763 }
764 
766  RegionAndSymbolInvalidationTraits *ETraits) const {
767  // FIXME: This also needs to invalidate captured globals.
768  if (const MemRegion *R = getBlockRegion())
769  Values.push_back(loc::MemRegionVal(R));
770 }
771 
773  BindingsTy &Bindings) const {
774  SValBuilder &SVB = getState()->getStateManager().getSValBuilder();
775  ArrayRef<ParmVarDecl*> Params;
776  if (isConversionFromLambda()) {
777  auto *LambdaOperatorDecl = cast<CXXMethodDecl>(CalleeCtx->getDecl());
778  Params = LambdaOperatorDecl->parameters();
779 
780  // For blocks converted from a C++ lambda, the callee declaration is the
781  // operator() method on the lambda so we bind "this" to
782  // the lambda captured by the block.
783  const VarRegion *CapturedLambdaRegion = getRegionStoringCapturedLambda();
784  SVal ThisVal = loc::MemRegionVal(CapturedLambdaRegion);
785  Loc ThisLoc = SVB.getCXXThis(LambdaOperatorDecl, CalleeCtx);
786  Bindings.push_back(std::make_pair(ThisLoc, ThisVal));
787  } else {
788  Params = cast<BlockDecl>(CalleeCtx->getDecl())->parameters();
789  }
790 
791  addParameterValuesToBindings(CalleeCtx, Bindings, SVB, *this,
792  Params);
793 }
794 
796  if (Data)
797  return loc::MemRegionVal(static_cast<const MemRegion *>(Data));
798  return UnknownVal();
799 }
800 
802  RegionAndSymbolInvalidationTraits *ETraits) const {
803  if (Data) {
804  loc::MemRegionVal MV(static_cast<const MemRegion *>(Data));
805  if (SymbolRef Sym = MV.getAsSymbol(true))
806  ETraits->setTrait(Sym,
808  Values.push_back(MV);
809  }
810 }
811 
813  const StackFrameContext *CalleeCtx,
814  BindingsTy &Bindings) const {
816 
817  SVal ThisVal = getCXXThisVal();
818  if (!ThisVal.isUnknown()) {
819  SValBuilder &SVB = getState()->getStateManager().getSValBuilder();
820  const auto *MD = cast<CXXMethodDecl>(CalleeCtx->getDecl());
821  Loc ThisLoc = SVB.getCXXThis(MD, CalleeCtx);
822  Bindings.push_back(std::make_pair(ThisLoc, ThisVal));
823  }
824 }
825 
827  if (Data)
828  return loc::MemRegionVal(DtorDataTy::getFromOpaqueValue(Data).getPointer());
829  return UnknownVal();
830 }
831 
833  // Base destructors are always called non-virtually.
834  // Skip CXXInstanceCall's devirtualization logic in this case.
835  if (isBaseDestructor())
837 
839 }
840 
842  const ObjCMethodDecl *D = getDecl();
843  if (!D)
844  return None;
845  return D->parameters();
846 }
847 
849  ValueList &Values, RegionAndSymbolInvalidationTraits *ETraits) const {
850 
851  // If the method call is a setter for property known to be backed by
852  // an instance variable, don't invalidate the entire receiver, just
853  // the storage for that instance variable.
854  if (const ObjCPropertyDecl *PropDecl = getAccessedProperty()) {
855  if (const ObjCIvarDecl *PropIvar = PropDecl->getPropertyIvarDecl()) {
856  SVal IvarLVal = getState()->getLValue(PropIvar, getReceiverSVal());
857  if (const MemRegion *IvarRegion = IvarLVal.getAsRegion()) {
858  ETraits->setTrait(
859  IvarRegion,
861  ETraits->setTrait(
862  IvarRegion,
864  Values.push_back(IvarLVal);
865  }
866  return;
867  }
868  }
869 
870  Values.push_back(getReceiverSVal());
871 }
872 
874  const LocationContext *LCtx = getLocationContext();
875  const ImplicitParamDecl *SelfDecl = LCtx->getSelfDecl();
876  if (!SelfDecl)
877  return SVal();
878  return getState()->getSVal(getState()->getRegion(SelfDecl, LCtx));
879 }
880 
882  // FIXME: Is this the best way to handle class receivers?
883  if (!isInstanceMessage())
884  return UnknownVal();
885 
886  if (const Expr *RecE = getOriginExpr()->getInstanceReceiver())
887  return getSVal(RecE);
888 
889  // An instance message with no expression means we are sending to super.
890  // In this case the object reference is the same as 'self'.
891  assert(getOriginExpr()->getReceiverKind() == ObjCMessageExpr::SuperInstance);
892  SVal SelfVal = getSelfSVal();
893  assert(SelfVal.isValid() && "Calling super but not in ObjC method");
894  return SelfVal;
895 }
896 
898  if (getOriginExpr()->getReceiverKind() == ObjCMessageExpr::SuperInstance ||
899  getOriginExpr()->getReceiverKind() == ObjCMessageExpr::SuperClass)
900  return true;
901 
902  if (!isInstanceMessage())
903  return false;
904 
905  SVal RecVal = getSVal(getOriginExpr()->getInstanceReceiver());
906 
907  return (RecVal == getSelfSVal());
908 }
909 
911  switch (getMessageKind()) {
912  case OCM_Message:
913  return getOriginExpr()->getSourceRange();
914  case OCM_PropertyAccess:
915  case OCM_Subscript:
916  return getContainingPseudoObjectExpr()->getSourceRange();
917  }
918  llvm_unreachable("unknown message kind");
919 }
920 
921 using ObjCMessageDataTy = llvm::PointerIntPair<const PseudoObjectExpr *, 2>;
922 
923 const PseudoObjectExpr *ObjCMethodCall::getContainingPseudoObjectExpr() const {
924  assert(Data && "Lazy lookup not yet performed.");
925  assert(getMessageKind() != OCM_Message && "Explicit message send.");
926  return ObjCMessageDataTy::getFromOpaqueValue(Data).getPointer();
927 }
928 
929 static const Expr *
931  const Expr *Syntactic = POE->getSyntacticForm();
932 
933  // This handles the funny case of assigning to the result of a getter.
934  // This can happen if the getter returns a non-const reference.
935  if (const auto *BO = dyn_cast<BinaryOperator>(Syntactic))
936  Syntactic = BO->getLHS();
937 
938  return Syntactic;
939 }
940 
942  if (!Data) {
943  // Find the parent, ignoring implicit casts.
946 
947  // Check if parent is a PseudoObjectExpr.
948  if (const auto *POE = dyn_cast_or_null<PseudoObjectExpr>(S)) {
949  const Expr *Syntactic = getSyntacticFromForPseudoObjectExpr(POE);
950 
951  ObjCMessageKind K;
952  switch (Syntactic->getStmtClass()) {
953  case Stmt::ObjCPropertyRefExprClass:
954  K = OCM_PropertyAccess;
955  break;
956  case Stmt::ObjCSubscriptRefExprClass:
957  K = OCM_Subscript;
958  break;
959  default:
960  // FIXME: Can this ever happen?
961  K = OCM_Message;
962  break;
963  }
964 
965  if (K != OCM_Message) {
966  const_cast<ObjCMethodCall *>(this)->Data
967  = ObjCMessageDataTy(POE, K).getOpaqueValue();
968  assert(getMessageKind() == K);
969  return K;
970  }
971  }
972 
973  const_cast<ObjCMethodCall *>(this)->Data
974  = ObjCMessageDataTy(nullptr, 1).getOpaqueValue();
975  assert(getMessageKind() == OCM_Message);
976  return OCM_Message;
977  }
978 
979  ObjCMessageDataTy Info = ObjCMessageDataTy::getFromOpaqueValue(Data);
980  if (!Info.getPointer())
981  return OCM_Message;
982  return static_cast<ObjCMessageKind>(Info.getInt());
983 }
984 
986  // Look for properties accessed with property syntax (foo.bar = ...)
987  if ( getMessageKind() == OCM_PropertyAccess) {
988  const PseudoObjectExpr *POE = getContainingPseudoObjectExpr();
989  assert(POE && "Property access without PseudoObjectExpr?");
990 
991  const Expr *Syntactic = getSyntacticFromForPseudoObjectExpr(POE);
992  auto *RefExpr = cast<ObjCPropertyRefExpr>(Syntactic);
993 
994  if (RefExpr->isExplicitProperty())
995  return RefExpr->getExplicitProperty();
996  }
997 
998  // Look for properties accessed with method syntax ([foo setBar:...]).
999  const ObjCMethodDecl *MD = getDecl();
1000  if (!MD || !MD->isPropertyAccessor())
1001  return nullptr;
1002 
1003  // Note: This is potentially quite slow.
1004  return MD->findPropertyDecl();
1005 }
1006 
1008  Selector Sel) const {
1009  assert(IDecl);
1010  AnalysisManager &AMgr =
1011  getState()->getStateManager().getOwningEngine()->getAnalysisManager();
1012  // If the class interface is declared inside the main file, assume it is not
1013  // subcassed.
1014  // TODO: It could actually be subclassed if the subclass is private as well.
1015  // This is probably very rare.
1016  SourceLocation InterfLoc = IDecl->getEndOfDefinitionLoc();
1017  if (InterfLoc.isValid() && AMgr.isInCodeFile(InterfLoc))
1018  return false;
1019 
1020  // Assume that property accessors are not overridden.
1021  if (getMessageKind() == OCM_PropertyAccess)
1022  return false;
1023 
1024  // We assume that if the method is public (declared outside of main file) or
1025  // has a parent which publicly declares the method, the method could be
1026  // overridden in a subclass.
1027 
1028  // Find the first declaration in the class hierarchy that declares
1029  // the selector.
1030  ObjCMethodDecl *D = nullptr;
1031  while (true) {
1032  D = IDecl->lookupMethod(Sel, true);
1033 
1034  // Cannot find a public definition.
1035  if (!D)
1036  return false;
1037 
1038  // If outside the main file,
1039  if (D->getLocation().isValid() && !AMgr.isInCodeFile(D->getLocation()))
1040  return true;
1041 
1042  if (D->isOverriding()) {
1043  // Search in the superclass on the next iteration.
1044  IDecl = D->getClassInterface();
1045  if (!IDecl)
1046  return false;
1047 
1048  IDecl = IDecl->getSuperClass();
1049  if (!IDecl)
1050  return false;
1051 
1052  continue;
1053  }
1054 
1055  return false;
1056  };
1057 
1058  llvm_unreachable("The while loop should always terminate.");
1059 }
1060 
1062  if (!MD)
1063  return MD;
1064 
1065  // Find the redeclaration that defines the method.
1066  if (!MD->hasBody()) {
1067  for (auto I : MD->redecls())
1068  if (I->hasBody())
1069  MD = cast<ObjCMethodDecl>(I);
1070  }
1071  return MD;
1072 }
1073 
1074 static bool isCallToSelfClass(const ObjCMessageExpr *ME) {
1075  const Expr* InstRec = ME->getInstanceReceiver();
1076  if (!InstRec)
1077  return false;
1078  const auto *InstRecIg = dyn_cast<DeclRefExpr>(InstRec->IgnoreParenImpCasts());
1079 
1080  // Check that receiver is called 'self'.
1081  if (!InstRecIg || !InstRecIg->getFoundDecl() ||
1082  !InstRecIg->getFoundDecl()->getName().equals("self"))
1083  return false;
1084 
1085  // Check that the method name is 'class'.
1086  if (ME->getSelector().getNumArgs() != 0 ||
1087  !ME->getSelector().getNameForSlot(0).equals("class"))
1088  return false;
1089 
1090  return true;
1091 }
1092 
1094  const ObjCMessageExpr *E = getOriginExpr();
1095  assert(E);
1096  Selector Sel = E->getSelector();
1097 
1098  if (E->isInstanceMessage()) {
1099  // Find the receiver type.
1100  const ObjCObjectPointerType *ReceiverT = nullptr;
1101  bool CanBeSubClassed = false;
1102  QualType SupersType = E->getSuperType();
1103  const MemRegion *Receiver = nullptr;
1104 
1105  if (!SupersType.isNull()) {
1106  // The receiver is guaranteed to be 'super' in this case.
1107  // Super always means the type of immediate predecessor to the method
1108  // where the call occurs.
1109  ReceiverT = cast<ObjCObjectPointerType>(SupersType);
1110  } else {
1111  Receiver = getReceiverSVal().getAsRegion();
1112  if (!Receiver)
1113  return {};
1114 
1115  DynamicTypeInfo DTI = getDynamicTypeInfo(getState(), Receiver);
1116  if (!DTI.isValid()) {
1117  assert(isa<AllocaRegion>(Receiver) &&
1118  "Unhandled untyped region class!");
1119  return {};
1120  }
1121 
1122  QualType DynType = DTI.getType();
1123  CanBeSubClassed = DTI.canBeASubClass();
1124  ReceiverT = dyn_cast<ObjCObjectPointerType>(DynType.getCanonicalType());
1125 
1126  if (ReceiverT && CanBeSubClassed)
1127  if (ObjCInterfaceDecl *IDecl = ReceiverT->getInterfaceDecl())
1128  if (!canBeOverridenInSubclass(IDecl, Sel))
1129  CanBeSubClassed = false;
1130  }
1131 
1132  // Handle special cases of '[self classMethod]' and
1133  // '[[self class] classMethod]', which are treated by the compiler as
1134  // instance (not class) messages. We will statically dispatch to those.
1135  if (auto *PT = dyn_cast_or_null<ObjCObjectPointerType>(ReceiverT)) {
1136  // For [self classMethod], return the compiler visible declaration.
1137  if (PT->getObjectType()->isObjCClass() &&
1138  Receiver == getSelfSVal().getAsRegion())
1140 
1141  // Similarly, handle [[self class] classMethod].
1142  // TODO: We are currently doing a syntactic match for this pattern with is
1143  // limiting as the test cases in Analysis/inlining/InlineObjCClassMethod.m
1144  // shows. A better way would be to associate the meta type with the symbol
1145  // using the dynamic type info tracking and use it here. We can add a new
1146  // SVal for ObjC 'Class' values that know what interface declaration they
1147  // come from. Then 'self' in a class method would be filled in with
1148  // something meaningful in ObjCMethodCall::getReceiverSVal() and we could
1149  // do proper dynamic dispatch for class methods just like we do for
1150  // instance methods now.
1151  if (E->getInstanceReceiver())
1152  if (const auto *M = dyn_cast<ObjCMessageExpr>(E->getInstanceReceiver()))
1153  if (isCallToSelfClass(M))
1155  }
1156 
1157  // Lookup the instance method implementation.
1158  if (ReceiverT)
1159  if (ObjCInterfaceDecl *IDecl = ReceiverT->getInterfaceDecl()) {
1160  // Repeatedly calling lookupPrivateMethod() is expensive, especially
1161  // when in many cases it returns null. We cache the results so
1162  // that repeated queries on the same ObjCIntefaceDecl and Selector
1163  // don't incur the same cost. On some test cases, we can see the
1164  // same query being issued thousands of times.
1165  //
1166  // NOTE: This cache is essentially a "global" variable, but it
1167  // only gets lazily created when we get here. The value of the
1168  // cache probably comes from it being global across ExprEngines,
1169  // where the same queries may get issued. If we are worried about
1170  // concurrency, or possibly loading/unloading ASTs, etc., we may
1171  // need to revisit this someday. In terms of memory, this table
1172  // stays around until clang quits, which also may be bad if we
1173  // need to release memory.
1174  using PrivateMethodKey = std::pair<const ObjCInterfaceDecl *, Selector>;
1175  using PrivateMethodCache =
1176  llvm::DenseMap<PrivateMethodKey, Optional<const ObjCMethodDecl *>>;
1177 
1178  static PrivateMethodCache PMC;
1179  Optional<const ObjCMethodDecl *> &Val = PMC[std::make_pair(IDecl, Sel)];
1180 
1181  // Query lookupPrivateMethod() if the cache does not hit.
1182  if (!Val.hasValue()) {
1183  Val = IDecl->lookupPrivateMethod(Sel);
1184 
1185  // If the method is a property accessor, we should try to "inline" it
1186  // even if we don't actually have an implementation.
1187  if (!*Val)
1188  if (const ObjCMethodDecl *CompileTimeMD = E->getMethodDecl())
1189  if (CompileTimeMD->isPropertyAccessor()) {
1190  if (!CompileTimeMD->getSelfDecl() &&
1191  isa<ObjCCategoryDecl>(CompileTimeMD->getDeclContext())) {
1192  // If the method is an accessor in a category, and it doesn't
1193  // have a self declaration, first
1194  // try to find the method in a class extension. This
1195  // works around a bug in Sema where multiple accessors
1196  // are synthesized for properties in class
1197  // extensions that are redeclared in a category and the
1198  // the implicit parameters are not filled in for
1199  // the method on the category.
1200  // This ensures we find the accessor in the extension, which
1201  // has the implicit parameters filled in.
1202  auto *ID = CompileTimeMD->getClassInterface();
1203  for (auto *CatDecl : ID->visible_extensions()) {
1204  Val = CatDecl->getMethod(Sel,
1205  CompileTimeMD->isInstanceMethod());
1206  if (*Val)
1207  break;
1208  }
1209  }
1210  if (!*Val)
1211  Val = IDecl->lookupInstanceMethod(Sel);
1212  }
1213  }
1214 
1215  const ObjCMethodDecl *MD = Val.getValue();
1216  if (CanBeSubClassed)
1217  return RuntimeDefinition(MD, Receiver);
1218  else
1219  return RuntimeDefinition(MD, nullptr);
1220  }
1221  } else {
1222  // This is a class method.
1223  // If we have type info for the receiver class, we are calling via
1224  // class name.
1225  if (ObjCInterfaceDecl *IDecl = E->getReceiverInterface()) {
1226  // Find/Return the method implementation.
1227  return RuntimeDefinition(IDecl->lookupPrivateClassMethod(Sel));
1228  }
1229  }
1230 
1231  return {};
1232 }
1233 
1235  if (isInSystemHeader() && !isInstanceMessage()) {
1236  Selector Sel = getSelector();
1237  if (Sel.getNumArgs() == 1 &&
1238  Sel.getIdentifierInfoForSlot(0)->isStr("valueWithPointer"))
1239  return true;
1240  }
1241 
1243 }
1244 
1246  const StackFrameContext *CalleeCtx,
1247  BindingsTy &Bindings) const {
1248  const auto *D = cast<ObjCMethodDecl>(CalleeCtx->getDecl());
1249  SValBuilder &SVB = getState()->getStateManager().getSValBuilder();
1250  addParameterValuesToBindings(CalleeCtx, Bindings, SVB, *this,
1251  D->parameters());
1252 
1253  SVal SelfVal = getReceiverSVal();
1254  if (!SelfVal.isUnknown()) {
1255  const VarDecl *SelfD = CalleeCtx->getAnalysisDeclContext()->getSelfDecl();
1256  MemRegionManager &MRMgr = SVB.getRegionManager();
1257  Loc SelfLoc = SVB.makeLoc(MRMgr.getVarRegion(SelfD, CalleeCtx));
1258  Bindings.push_back(std::make_pair(SelfLoc, SelfVal));
1259  }
1260 }
1261 
1264  const LocationContext *LCtx) {
1265  if (const auto *MCE = dyn_cast<CXXMemberCallExpr>(CE))
1266  return create<CXXMemberCall>(MCE, State, LCtx);
1267 
1268  if (const auto *OpCE = dyn_cast<CXXOperatorCallExpr>(CE)) {
1269  const FunctionDecl *DirectCallee = OpCE->getDirectCallee();
1270  if (const auto *MD = dyn_cast<CXXMethodDecl>(DirectCallee))
1271  if (MD->isInstance())
1272  return create<CXXMemberOperatorCall>(OpCE, State, LCtx);
1273 
1274  } else if (CE->getCallee()->getType()->isBlockPointerType()) {
1275  return create<BlockCall>(CE, State, LCtx);
1276  }
1277 
1278  // Otherwise, it's a normal function call, static member function call, or
1279  // something we can't reason about.
1280  return create<SimpleFunctionCall>(CE, State, LCtx);
1281 }
1282 
1285  ProgramStateRef State) {
1286  const LocationContext *ParentCtx = CalleeCtx->getParent();
1287  const LocationContext *CallerCtx = ParentCtx->getStackFrame();
1288  assert(CallerCtx && "This should not be used for top-level stack frames");
1289 
1290  const Stmt *CallSite = CalleeCtx->getCallSite();
1291 
1292  if (CallSite) {
1293  if (const CallExpr *CE = dyn_cast<CallExpr>(CallSite))
1294  return getSimpleCall(CE, State, CallerCtx);
1295 
1296  switch (CallSite->getStmtClass()) {
1297  case Stmt::CXXConstructExprClass:
1298  case Stmt::CXXTemporaryObjectExprClass: {
1299  SValBuilder &SVB = State->getStateManager().getSValBuilder();
1300  const auto *Ctor = cast<CXXMethodDecl>(CalleeCtx->getDecl());
1301  Loc ThisPtr = SVB.getCXXThis(Ctor, CalleeCtx);
1302  SVal ThisVal = State->getSVal(ThisPtr);
1303 
1304  return getCXXConstructorCall(cast<CXXConstructExpr>(CallSite),
1305  ThisVal.getAsRegion(), State, CallerCtx);
1306  }
1307  case Stmt::CXXNewExprClass:
1308  return getCXXAllocatorCall(cast<CXXNewExpr>(CallSite), State, CallerCtx);
1309  case Stmt::ObjCMessageExprClass:
1310  return getObjCMethodCall(cast<ObjCMessageExpr>(CallSite),
1311  State, CallerCtx);
1312  default:
1313  llvm_unreachable("This is not an inlineable statement.");
1314  }
1315  }
1316 
1317  // Fall back to the CFG. The only thing we haven't handled yet is
1318  // destructors, though this could change in the future.
1319  const CFGBlock *B = CalleeCtx->getCallSiteBlock();
1320  CFGElement E = (*B)[CalleeCtx->getIndex()];
1321  assert((E.getAs<CFGImplicitDtor>() || E.getAs<CFGTemporaryDtor>()) &&
1322  "All other CFG elements should have exprs");
1323 
1324  SValBuilder &SVB = State->getStateManager().getSValBuilder();
1325  const auto *Dtor = cast<CXXDestructorDecl>(CalleeCtx->getDecl());
1326  Loc ThisPtr = SVB.getCXXThis(Dtor, CalleeCtx);
1327  SVal ThisVal = State->getSVal(ThisPtr);
1328 
1329  const Stmt *Trigger;
1331  Trigger = AutoDtor->getTriggerStmt();
1332  else if (Optional<CFGDeleteDtor> DeleteDtor = E.getAs<CFGDeleteDtor>())
1333  Trigger = DeleteDtor->getDeleteExpr();
1334  else
1335  Trigger = Dtor->getBody();
1336 
1337  return getCXXDestructorCall(Dtor, Trigger, ThisVal.getAsRegion(),
1338  E.getAs<CFGBaseDtor>().hasValue(), State,
1339  CallerCtx);
1340 }
The receiver is the instance of the superclass object.
Definition: ExprObjC.h:1082
Defines the clang::ASTContext interface.
SVal attemptDownCast(SVal Base, QualType DerivedPtrType, bool &Failed)
Attempts to do a down cast.
Definition: Store.cpp:305
SVal getSelfSVal() const
Return the value of &#39;self&#39; if available.
Definition: CallEvent.cpp:873
const VarRegion * getParameterLocation(unsigned Index) const
Returns memory location for a parameter variable within the callee stack frame.
Definition: CallEvent.cpp:215
SVal getReceiverSVal() const
Returns the value of the receiver at the time of this call.
Definition: CallEvent.cpp:881
void getExtraInvalidatedValues(ValueList &Values, RegionAndSymbolInvalidationTraits *ETraits) const override
Definition: CallEvent.cpp:801
Represents a function declaration or definition.
Definition: Decl.h:1716
Expr * getSyntacticForm()
Return the syntactic form of this expression, i.e.
Definition: Expr.h:5221
Smart pointer class that efficiently represents Objective-C method names.
PointerType - C99 6.7.5.1 - Pointer Declarators.
Definition: Type.h:2393
A (possibly-)qualified type.
Definition: Type.h:655
MemRegion - The root abstract class for all memory regions.
Definition: MemRegion.h:94
bool isBlockPointerType() const
Definition: Type.h:6121
bool argumentsMayEscape() const override
Returns true if any of the arguments are known to escape to long- term storage, even if this method w...
Definition: CallEvent.cpp:507
Selector getSelector() const
Definition: ExprObjC.cpp:312
ObjCInterfaceDecl * getClassInterface()
Definition: DeclObjC.cpp:1098
Stmt * getBody() const
Get the body of the Declaration.
static const Expr * getSyntacticFromForPseudoObjectExpr(const PseudoObjectExpr *POE)
Definition: CallEvent.cpp:930
Stmt - This represents one statement.
Definition: Stmt.h:66
Information about invalidation for a particular region/symbol.
Definition: MemRegion.h:1384
ProgramPoint getProgramPoint(bool IsPreVisit=false, const ProgramPointTag *Tag=nullptr) const
Returns an appropriate ProgramPoint for this call.
Definition: CallEvent.cpp:299
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3211
static bool isCallToSelfClass(const ObjCMessageExpr *ME)
Definition: CallEvent.cpp:1074
QualType getPointeeType() const
If this is a pointer, ObjC object pointer, or block pointer, this returns the respective pointee...
Definition: Type.cpp:497
C Language Family Type Representation.
Defines the SourceManager interface.
ObjCInterfaceDecl * getReceiverInterface() const
Retrieve the Objective-C interface to which this message is being directed, if known.
Definition: ExprObjC.cpp:333
AnalysisDeclContext * getCalleeAnalysisDeclContext() const
Returns AnalysisDeclContext for the callee stack frame.
Definition: CallEvent.cpp:170
QualType getLValueReferenceType(QualType T, bool SpelledAsLValue=true) const
Return the uniqued reference to the type for an lvalue reference to the specified type...
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:86
const RecordType * getAsStructureType() const
Definition: Type.cpp:513
Represents C++ object destructor generated from a call to delete.
Definition: CFG.h:409
SourceRange getSourceRange() const override
Definition: CallEvent.cpp:910
Represents a program point just before an implicit call event.
Definition: ProgramPoint.h:557
A container of type source information.
Definition: Decl.h:86
CallEventRef getSimpleCall(const CallExpr *E, ProgramStateRef State, const LocationContext *LCtx)
Definition: CallEvent.cpp:1263
virtual RuntimeDefinition getRuntimeDefinition() const =0
Returns the definition of the function or method that will be called.
SVal evalCast(SVal val, QualType castTy, QualType originalType)
void getInitialStackFrameContents(const StackFrameContext *CalleeCtx, BindingsTy &Bindings) const override
Definition: CallEvent.cpp:691
Expr * ignoreParenBaseCasts() LLVM_READONLY
Ignore parentheses and derived-to-base casts.
Definition: Expr.cpp:2614
bool isOverriding() const
Whether this method overrides any other in the class hierarchy.
Definition: DeclObjC.h:474
const Expr * getOriginExpr() const
Returns the expression whose value will be the result of this call.
Definition: CallEvent.h:249
Represents a variable declaration or definition.
Definition: Decl.h:814
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6526
loc::MemRegionVal getCXXThis(const CXXMethodDecl *D, const StackFrameContext *SFC)
Return a memory region for the &#39;this&#39; object reference.
void setTrait(SymbolRef Sym, InvalidationKinds IK)
Definition: MemRegion.cpp:1533
SVal getSVal(const Stmt *S) const
Get the value of arbitrary expressions at this point in the path.
Definition: CallEvent.h:209
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:139
static bool isVoidPointerToNonConst(QualType T)
Definition: CallEvent.cpp:121
const Expr * getCXXThisExpr() const override
Returns the expression representing the implicit &#39;this&#39; object.
Definition: CallEvent.cpp:747
ArrayRef< ParmVarDecl * > parameters() const override
Return call&#39;s formal parameters.
Definition: CallEvent.cpp:446
Represents a parameter to a function.
Definition: Decl.h:1535
Defines the clang::Expr interface and subclasses for C++ expressions.
void getExtraInvalidatedValues(ValueList &Values, RegionAndSymbolInvalidationTraits *ETraits) const override
Definition: CallEvent.cpp:765
Symbolic value.
Definition: SymExpr.h:30
IdentifierInfo * getIdentifier() const
Get the identifier that names this declaration, if there is one.
Definition: Decl.h:269
Represents a struct/union/class.
Definition: Decl.h:3570
bool isValid() const
Return false if no dynamic type info is available.
One of these records is kept for each identifier that is lexed.
RuntimeDefinition getRuntimeDefinition() const override
Definition: CallEvent.cpp:735
MemRegionManager & getRegionManager()
Definition: SValBuilder.h:175
param_type_iterator param_type_end() const
Definition: CallEvent.h:474
bool isStr(const char(&Str)[StrLen]) const
Return true if this is the identifier for the specified string.
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:150
field_range fields() const
Definition: Decl.h:3786
AnalysisDeclContext contains the context data for the function or method under analysis.
StringRef getCTUDir()
Returns the directory containing the CTU related files.
Represents C++ object destructor implicitly generated for automatic object or temporary bound to cons...
Definition: CFG.h:384
bool isReferenceType() const
Definition: Type.h:6125
static bool isInCodeFile(SourceLocation SL, const SourceManager &SM)
virtual const Expr * getArgExpr(unsigned Index) const
Returns the expression associated with a given argument.
Definition: CallEvent.h:299
bool isObjCSelType() const
Definition: Type.h:6251
An r-value expression (a pr-value in the C++11 taxonomy) produces a temporary value.
Definition: Specifiers.h:110
ArrayRef< ParmVarDecl * > parameters() const
Definition: Decl.h:2231
static void addParameterValuesToBindings(const StackFrameContext *CalleeCtx, CallEvent::BindingsTy &Bindings, SValBuilder &SVB, const CallEvent &Call, ArrayRef< ParmVarDecl *> parameters)
Definition: CallEvent.cpp:420
BlockDataRegion - A region that represents a block instance.
Definition: MemRegion.h:668
Represents any expression that calls an Objective-C method.
Definition: CallEvent.h:933
virtual Kind getKind() const =0
Returns the kind of call this is.
const ImplicitParamDecl * getSelfDecl() const
bool hasNonZeroCallbackArg() const
Returns true if any of the arguments appear to represent callbacks.
Definition: CallEvent.cpp:154
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
An x-value expression is a reference to an object with independent storage but which can be "moved"...
Definition: Specifiers.h:119
ExprValueKind getValueKind() const
getValueKind - The value kind that this expression produces.
Definition: Expr.h:405
static void findPtrToConstParams(llvm::SmallSet< unsigned, 4 > &PreserveArgs, const CallEvent &Call)
Definition: CallEvent.cpp:248
const clang::PrintingPolicy & getPrintingPolicy() const
Definition: ASTContext.h:643
const LocationContext * getParent() const
static bool isPointerToConst(QualType Ty)
Returns true if a type is a pointer-to-const or reference-to-const with no further indirection...
Definition: CallEvent.cpp:234
bool isUnknown() const
Definition: SVals.h:137
QualType getType() const
Returns the currently inferred upper bound on the runtime type.
static const ObjCMethodDecl * findDefiningRedecl(const ObjCMethodDecl *MD)
Definition: CallEvent.cpp:1061
SVal getReturnValue() const
Returns the return value of the call.
Definition: CallEvent.cpp:345
unsigned size() const
Definition: CFG.h:713
const FunctionDecl * getDecl() const override
Returns the declaration of the function or method that will be called.
Definition: CallEvent.h:498
param_type_iterator param_type_begin() const
Returns an iterator over the types of the call&#39;s formal parameters.
Definition: CallEvent.h:470
Represents an ObjC class declaration.
Definition: DeclObjC.h:1193
static bool isVariadic(const Decl *D)
Returns true if the given decl is known to be variadic.
Definition: CallEvent.cpp:407
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:877
virtual ArrayRef< ParmVarDecl * > parameters() const =0
Return call&#39;s formal parameters.
const CFGBlock * getCallSiteBlock() const
SymbolRef getAsSymbol(bool IncludeBaseRegions=false) const
If this SVal wraps a symbol return that SymbolRef.
Definition: SVals.cpp:127
SmallVectorImpl< FrameBindingTy > BindingsTy
Definition: CallEvent.h:378
const StackFrameContext * getStackFrame(AnalysisDeclContext *Ctx, LocationContext const *Parent, const Stmt *S, const CFGBlock *Blk, unsigned Idx)
const Expr * getCXXThisExpr() const override
Returns the expression representing the implicit &#39;this&#39; object.
Definition: CallEvent.cpp:731
ObjCMessageKind
Represents the ways an Objective-C message send can occur.
Definition: CallEvent.h:924
bool isReceiverSelfOrSuper() const
Checks if the receiver refers to &#39;self&#39; or &#39;super&#39;.
Definition: CallEvent.cpp:897
CXXRecordDecl * getAsCXXRecordDecl() const
Retrieves the CXXRecordDecl that this type refers to, either because the type is a RecordType or beca...
Definition: Type.cpp:1627
const Stmt * getCallSite() const
ArrayRef< ParmVarDecl * > parameters() const override
Definition: CallEvent.cpp:841
Represents a single basic block in a source-level CFG.
Definition: CFG.h:552
bool argumentsMayEscape() const override
Definition: CallEvent.cpp:1234
Loc makeLoc(SymbolRef sym)
Definition: SValBuilder.h:354
ArrayRef< ParmVarDecl * > parameters() const override
Definition: CallEvent.cpp:758
AnalysisDeclContext * getContext(const Decl *D)
const LocationContext * getLocationContext() const
The context in which the call is being evaluated.
Definition: CallEvent.h:239
static bool isCallback(QualType T)
Definition: CallEvent.cpp:97
Pepresents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:3860
bool canBeASubClass() const
Returns false if the type information is precise (the type T is the only type in the lattice)...
Expr - This represents one expression.
Definition: Expr.h:106
void getInitialStackFrameContents(const StackFrameContext *CalleeCtx, BindingsTy &Bindings) const override
Definition: CallEvent.cpp:1245
Stores the currently inferred strictest bound on the runtime type of a region in a given state along ...
const FunctionDecl * getDecl() const override
Returns the declaration of the function or method that will be called.
Definition: CallEvent.cpp:568
CFGBlock * getBlock(Stmt *S)
Returns the CFGBlock the specified Stmt* appears in.
Definition: CFGStmtMap.cpp:27
CallEventRef getCaller(const StackFrameContext *CalleeCtx, ProgramStateRef State)
Definition: CallEvent.cpp:1284
static bool isCLibraryFunction(const FunctionDecl *FD, StringRef Name=StringRef())
Returns true if the callee is an externally-visible function in the top-level namespace, such as malloc.
llvm::mapped_iterator< ArrayRef< ParmVarDecl * >::iterator, GetTypeFn > param_type_iterator
Definition: CallEvent.h:463
const Expr * getCallee() const
Definition: Expr.h:2356
bool isInSystemHeader() const
Returns true if the callee is known to be from a system header.
Definition: CallEvent.h:261
StringRef getNameForSlot(unsigned argIndex) const
Retrieve the name at a given position in the selector.
bool isValid() const
Definition: SVals.h:149
ObjCInterfaceDecl * getSuperClass() const
Definition: DeclObjC.cpp:331
virtual SVal getCXXThisVal() const
Returns the value of the implicit &#39;this&#39; object.
Definition: CallEvent.cpp:619
const IdentifierInfo * getCalleeIdentifier() const
Returns the name of the callee, if its name is a simple identifier.
Definition: CallEvent.h:359
void getInitialStackFrameContents(const StackFrameContext *CalleeCtx, BindingsTy &Bindings) const override
Definition: CallEvent.cpp:772
bool hasBody(const FunctionDecl *&Definition) const
Returns true if the function has a body.
Definition: Decl.cpp:2626
Defines the clang::IdentifierInfo, clang::IdentifierTable, and clang::Selector interfaces.
QualType getType() const
Definition: Expr.h:128
virtual const Decl * getDecl() const
Returns the declaration of the function or method that will be called.
Definition: CallEvent.h:229
An expression that sends a message to the given Objective-C object or class.
Definition: ExprObjC.h:925
virtual cross_tu::CrossTranslationUnitContext * getCrossTranslationUnitContext()=0
QualType getRecordType(const RecordDecl *Decl) const
unsigned getNumArgs() const
void getExtraInvalidatedValues(ValueList &Values, RegionAndSymbolInvalidationTraits *ETraits) const override
Definition: CallEvent.cpp:848
Represents C++ object destructor implicitly generated for base object in destructor.
Definition: CFG.h:435
bool isNull() const
Return true if this QualType doesn&#39;t point to a type yet.
Definition: Type.h:720
ParentMap & getParentMap() const
Optional< T > getAs() const
Convert to the specified SVal type, returning None if this SVal is not of the desired type...
Definition: SVals.h:112
virtual bool argumentsMayEscape() const
Returns true if any of the arguments are known to escape to long- term storage, even if this method w...
Definition: CallEvent.h:330
RuntimeDefinition getRuntimeDefinition() const override
Definition: CallEvent.cpp:630
bool isConstQualified() const
Determine whether this type is const-qualified.
Definition: Type.h:5948
virtual SourceRange getSourceRange() const
Returns a source range for the entire call, suitable for outputting in diagnostics.
Definition: CallEvent.h:290
void getInitialStackFrameContents(const StackFrameContext *CalleeCtx, BindingsTy &Bindings) const override
Populates the given SmallVector with the bindings in the callee&#39;s stack frame at the start of this ca...
Definition: CallEvent.cpp:498
const MemRegion * StripCasts(bool StripBaseCasts=true) const
Definition: MemRegion.cpp:1152
const ImplicitParamDecl * getSelfDecl() const
Return the ImplicitParamDecl* associated with &#39;self&#39; if this AnalysisDeclContext wraps an ObjCMethodD...
Defines the runtime definition of the called function.
Definition: CallEvent.h:128
QualType getCanonicalType() const
Definition: Type.h:5928
PseudoObjectExpr - An expression which accesses a pseudo-object l-value.
Definition: Expr.h:5177
This class represents a description of a function call using the number of arguments and the name of ...
Definition: CallEvent.h:78
IdentifierInfo * getIdentifierInfoForSlot(unsigned argIndex) const
Retrieve the identifier at a given position in the selector.
void getExtraInvalidatedValues(ValueList &Values, RegionAndSymbolInvalidationTraits *ETraits) const override
Definition: CallEvent.cpp:588
Encodes a location in the source.
const FunctionDecl * getDecl() const override
Definition: CallEvent.cpp:576
static bool isCallStmt(const Stmt *S)
Returns true if this is a statement is a function or method call of some kind.
Definition: CallEvent.cpp:372
ProgramPoints can be "tagged" as representing points specific to a given analysis entity...
Definition: ProgramPoint.h:40
const MemRegion * getAsRegion() const
Definition: SVals.cpp:151
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:2045
ASTContext & getContext()
Definition: SValBuilder.h:156
SVal - This represents a symbolic expression, which can be either an L-value or an R-value...
Definition: SVals.h:76
CanQualType VoidTy
Definition: ASTContext.h:1004
const StackFrameContext * getStackFrame() const
Definition: MemRegion.cpp:158
const Decl * getDecl() const
bool isAnyPointerType() const
Definition: Type.h:6117
bool naiveCTUEnabled()
Returns true when naive cross translation unit analysis is enabled.
Represents one property declaration in an Objective-C interface.
Definition: DeclObjC.h:748
RuntimeDefinition getRuntimeDefinition() const override
Definition: CallEvent.cpp:832
const ObjCMethodDecl * getMethodDecl() const
Definition: ExprObjC.h:1324
Tells that a region&#39;s contents is not changed.
Definition: MemRegion.h:1399
virtual void getExtraInvalidatedValues(ValueList &Values, RegionAndSymbolInvalidationTraits *ETraits) const
Used to specify non-argument regions that will be invalidated as a result of this call...
Definition: CallEvent.h:217
Optional< T > getAs() const
Convert to the specified CFGElement type, returning None if this CFGElement is not of the desired typ...
Definition: CFG.h:110
Defines various enumerations that describe declaration and type specifiers.
StringRef getName() const
Return the actual identifier string.
Expr * getInstanceReceiver()
Returns the object expression (receiver) for an instance message, or null for a message that is not a...
Definition: ExprObjC.h:1228
static const unsigned NoArgRequirement
Definition: CallEvent.h:87
llvm::Expected< const FunctionDecl * > getCrossTUDefinition(const FunctionDecl *FD, StringRef CrossTUDir, StringRef IndexName)
This function loads a function definition from an external AST file and merge it into the original AS...
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: DeclBase.h:948
SVal getCXXThisVal() const
Returns the value of the implicit &#39;this&#39; object.
Definition: CallEvent.cpp:795
Dataflow Directional Tag Classes.
virtual bool canBeOverridenInSubclass(ObjCInterfaceDecl *IDecl, Selector Sel) const
Check if the selector may have multiple definitions (may have overrides).
Definition: CallEvent.cpp:1007
const BlockDataRegion * getBlockRegion() const
Returns the region associated with this instance of the block.
Definition: CallEvent.cpp:751
AnalysisDeclContextManager * getManager() const
Return the AnalysisDeclContextManager (if any) that created this AnalysisDeclContext.
bool isValid() const
Return true if this is a valid SourceLocation object.
virtual SourceRange getArgSourceRange(unsigned Index) const
Returns the source range for errors associated with this argument.
Definition: CallEvent.cpp:338
Represents a program point just after an implicit call event.
Definition: ProgramPoint.h:574
DynamicTypeInfo getDynamicTypeInfo(ProgramStateRef State, const MemRegion *Reg)
Get dynamic type information for a region.
RuntimeDefinition getRuntimeDefinition() const override
Definition: CallEvent.cpp:1093
const VarRegion * getVarRegion(const VarDecl *D, const LocationContext *LC)
getVarRegion - Retrieve or create the memory region associated with a specified VarDecl and LocationC...
Definition: MemRegion.cpp:819
QualType getSuperType() const
Retrieve the type referred to by &#39;super&#39;.
Definition: ExprObjC.h:1304
StmtClass getStmtClass() const
Definition: Stmt.h:391
bool hasVoidPointerToNonConstArg() const
Returns true if any of the arguments is void*.
Definition: CallEvent.cpp:158
const CXXRecordDecl * getParent() const
Returns the parent of this method declaration, which is the class in which this method is defined...
Definition: DeclCXX.h:2165
Represents an abstract call to a function or method along a particular path.
Definition: CallEvent.h:165
ObjCMessageKind getMessageKind() const
Returns how the message was written in the source (property access, subscript, or explicit message se...
Definition: CallEvent.cpp:941
This class is used for tools that requires cross translation unit capability.
const Decl * getDecl() const
Expr * IgnoreParenImpCasts() LLVM_READONLY
IgnoreParenImpCasts - Ignore parentheses and implicit casts.
Definition: Expr.cpp:2631
Represents a pointer to an Objective C object.
Definition: Type.h:5611
const FunctionDecl * getAsFunctionDecl() const
getAsFunctionDecl - If this SVal is a MemRegionVal and wraps a CodeTextRegion wrapping a FunctionDecl...
Definition: SVals.cpp:63
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:4135
StringRef getCTUIndexName()
Returns the name of the file containing the CTU index of functions.
ObjCInterfaceDecl * getInterfaceDecl() const
If this pointer points to an Objective @interface type, gets the declaration for that interface...
Definition: Type.h:5667
bool hasBody() const override
Determine whether this method has a body.
Definition: DeclObjC.h:526
static QualType getDeclaredResultType(const Decl *D)
Returns the result type of a function or method declaration.
Definition: CallEvent.cpp:378
const StackFrameContext * getStackFrame() const
bool isGlobalCFunction(StringRef SpecificName=StringRef()) const
Returns true if the callee is an externally-visible function in the top-level namespace, such as malloc.
Definition: CallEvent.cpp:162
ObjCMethodDecl * lookupMethod(Selector Sel, bool isInstance, bool shallowCategoryLookup=false, bool followSuper=true, const ObjCCategoryDecl *C=nullptr) const
lookupMethod - This method returns an instance/class method by looking in the class, its categories, and its super classes (using a linear search).
Definition: DeclObjC.cpp:676
QualType getResultType() const
Returns the result type, adjusted for references.
Definition: CallEvent.cpp:70
bool hasMutableFields() const
Determine whether this class, or any of its class subobjects, contains a mutable field.
Definition: DeclCXX.h:1360
const ObjCPropertyDecl * findPropertyDecl(bool CheckOverrides=true) const
Returns the property associated with this method&#39;s selector.
Definition: DeclObjC.cpp:1256
Defines the C++ Decl subclasses, other than those for templates (found in DeclTemplate.h) and friends (in DeclFriend.h).
bool hasNonNullArgumentsWithType(bool(*Condition)(QualType)) const
Returns true if the type of any of the non-null arguments satisfies the condition.
Definition: CallEvent.cpp:131
const ProgramStateRef & getState() const
The state in which the call is being evaluated.
Definition: CallEvent.h:234
Defines the clang::SourceLocation class and associated facilities.
Represents a C++ struct/union/class.
Definition: DeclCXX.h:302
QualType getRValueReferenceType(QualType T) const
Return the uniqued reference to the type for an rvalue reference to the specified type...
bool isVoidType() const
Definition: Type.h:6340
SVal getCXXThisVal() const override
Returns the value of the implicit &#39;this&#39; object.
Definition: CallEvent.cpp:826
Represents C++ object destructor implicitly generated by compiler on various occasions.
Definition: CFG.h:359
bool isCalled(const CallDescription &CD) const
Returns true if the CallEvent is a call to a function that matches the CallDescription.
Definition: CallEvent.cpp:316
ObjCIvarDecl - Represents an ObjC instance variable.
Definition: DeclObjC.h:1966
virtual unsigned getNumArgs() const =0
Returns the number of arguments (explicit and implicit).
Represents a top-level expression in a basic block.
Definition: CFG.h:56
llvm::PointerIntPair< const PseudoObjectExpr *, 2 > ObjCMessageDataTy
Definition: CallEvent.cpp:921
QualType getPointerType(QualType T) const
Return the uniqued reference to the type for a pointer to the specified type.
const MemRegion * getBaseRegion() const
Definition: MemRegion.cpp:1126
SourceRange getSourceRange() const LLVM_READONLY
SourceLocation tokens are not useful in isolation - they are low level value objects created/interpre...
Definition: Stmt.cpp:266
CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]).
Definition: Expr.h:2316
void emitCrossTUDiagnostics(const IndexError &IE)
Emit diagnostics for the user for potential configuration errors.
StringRef getName() const
Get the name of identifier for this declaration as a StringRef.
Definition: Decl.h:275
const ObjCPropertyDecl * getAccessedProperty() const
Definition: CallEvent.cpp:985
Stmt * getParentIgnoreParenCasts(Stmt *) const
Definition: ParentMap.cpp:134
ProgramStateRef invalidateRegions(unsigned BlockCount, ProgramStateRef Orig=nullptr) const
Returns a new state with all argument regions invalidated.
Definition: CallEvent.cpp:259
bool isDependentType() const
Whether this type is a dependent type, meaning that its definition somehow depends on a template para...
Definition: Type.h:1942
A reference to a declared variable, function, enum, etc.
Definition: Expr.h:974
ArrayRef< ParmVarDecl * > parameters() const
Definition: Decl.h:3949
bool isPointerType() const
Definition: Type.h:6113
virtual SVal getArgSVal(unsigned Index) const
Returns the value of a given argument at the time of the call.
Definition: CallEvent.cpp:331
An l-value expression is a reference to an object with independent storage.
Definition: Specifiers.h:114
const void * Data
Definition: CallEvent.h:176
A trivial tuple used to represent a source range.
bool isPropertyAccessor() const
Definition: DeclObjC.h:461
AnalysisDeclContext * getAnalysisDeclContext() const
SourceLocation getEndOfDefinitionLoc() const
Definition: DeclObjC.h:1899
bool isFunctionPointerType() const
Definition: Type.h:6137
The receiver is a superclass.
Definition: ExprObjC.h:1079
bool isInstanceMessage() const
Determine whether this is an instance message to either a computed object or to super.
Definition: ExprObjC.h:1216
SourceLocation getBegin() const
Represents C++ object destructor implicitly generated at the end of full expression for temporary obj...
Definition: CFG.h:477
RuntimeDefinition getRuntimeDefinition() const override
Returns the definition of the function or method that will be called.
Definition: CallEvent.cpp:453
bool isUnknownOrUndef() const
Definition: SVals.h:145
SourceLocation getLocation() const
Definition: DeclBase.h:419
ArrayRef< ParmVarDecl * > parameters() const
Definition: DeclObjC.h:407
void getInitialStackFrameContents(const StackFrameContext *CalleeCtx, BindingsTy &Bindings) const override
Definition: CallEvent.cpp:812
const StackFrameContext * getCalleeStackFrame() const
Returns the callee stack frame.
Definition: CallEvent.cpp:186
virtual AnalysisManager & getAnalysisManager()=0