clang  9.0.0svn
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  if (!D)
173  return nullptr;
174 
175  // TODO: For now we skip functions without definitions, even if we have
176  // our own getDecl(), because it's hard to find out which re-declaration
177  // is going to be used, and usually clients don't really care about this
178  // situation because there's a loss of precision anyway because we cannot
179  // inline the call.
181  if (!RD.getDecl())
182  return nullptr;
183 
184  AnalysisDeclContext *ADC =
186 
187  // TODO: For now we skip virtual functions, because this also rises
188  // the problem of which decl to use, but now it's across different classes.
189  if (RD.mayHaveOtherDefinitions() || RD.getDecl() != ADC->getDecl())
190  return nullptr;
191 
192  return ADC;
193 }
194 
197  if (!ADC)
198  return nullptr;
199 
200  const Expr *E = getOriginExpr();
201  if (!E)
202  return nullptr;
203 
204  // Recover CFG block via reverse lookup.
205  // TODO: If we were to keep CFG element information as part of the CallEvent
206  // instead of doing this reverse lookup, we would be able to build the stack
207  // frame for non-expression-based calls, and also we wouldn't need the reverse
208  // lookup.
210  const CFGBlock *B = Map->getBlock(E);
211  assert(B);
212 
213  // Also recover CFG index by scanning the CFG block.
214  unsigned Idx = 0, Sz = B->size();
215  for (; Idx < Sz; ++Idx)
216  if (auto StmtElem = (*B)[Idx].getAs<CFGStmt>())
217  if (StmtElem->getStmt() == E)
218  break;
219  assert(Idx < Sz);
220 
221  return ADC->getManager()->getStackFrame(ADC, LCtx, E, B, Idx);
222 }
223 
224 const VarRegion *CallEvent::getParameterLocation(unsigned Index) const {
225  const StackFrameContext *SFC = getCalleeStackFrame();
226  // We cannot construct a VarRegion without a stack frame.
227  if (!SFC)
228  return nullptr;
229 
230  // Retrieve parameters of the definition, which are different from
231  // CallEvent's parameters() because getDecl() isn't necessarily
232  // the definition. SFC contains the definition that would be used
233  // during analysis.
234  const Decl *D = SFC->getDecl();
235 
236  // TODO: Refactor into a virtual method of CallEvent, like parameters().
237  const ParmVarDecl *PVD = nullptr;
238  if (const auto *FD = dyn_cast<FunctionDecl>(D))
239  PVD = FD->parameters()[Index];
240  else if (const auto *BD = dyn_cast<BlockDecl>(D))
241  PVD = BD->parameters()[Index];
242  else if (const auto *MD = dyn_cast<ObjCMethodDecl>(D))
243  PVD = MD->parameters()[Index];
244  else if (const auto *CD = dyn_cast<CXXConstructorDecl>(D))
245  PVD = CD->parameters()[Index];
246  assert(PVD && "Unexpected Decl kind!");
247 
248  const VarRegion *VR =
249  State->getStateManager().getRegionManager().getVarRegion(PVD, SFC);
250 
251  // This sanity check would fail if our parameter declaration doesn't
252  // correspond to the stack frame's function declaration.
253  assert(VR->getStackFrame() == SFC);
254 
255  return VR;
256 }
257 
258 /// Returns true if a type is a pointer-to-const or reference-to-const
259 /// with no further indirection.
260 static bool isPointerToConst(QualType Ty) {
261  QualType PointeeTy = Ty->getPointeeType();
262  if (PointeeTy == QualType())
263  return false;
264  if (!PointeeTy.isConstQualified())
265  return false;
266  if (PointeeTy->isAnyPointerType())
267  return false;
268  return true;
269 }
270 
271 // Try to retrieve the function declaration and find the function parameter
272 // types which are pointers/references to a non-pointer const.
273 // We will not invalidate the corresponding argument regions.
274 static void findPtrToConstParams(llvm::SmallSet<unsigned, 4> &PreserveArgs,
275  const CallEvent &Call) {
276  unsigned Idx = 0;
277  for (CallEvent::param_type_iterator I = Call.param_type_begin(),
278  E = Call.param_type_end();
279  I != E; ++I, ++Idx) {
280  if (isPointerToConst(*I))
281  PreserveArgs.insert(Idx);
282  }
283 }
284 
286  ProgramStateRef Orig) const {
287  ProgramStateRef Result = (Orig ? Orig : getState());
288 
289  // Don't invalidate anything if the callee is marked pure/const.
290  if (const Decl *callee = getDecl())
291  if (callee->hasAttr<PureAttr>() || callee->hasAttr<ConstAttr>())
292  return Result;
293 
294  SmallVector<SVal, 8> ValuesToInvalidate;
296 
297  getExtraInvalidatedValues(ValuesToInvalidate, &ETraits);
298 
299  // Indexes of arguments whose values will be preserved by the call.
300  llvm::SmallSet<unsigned, 4> PreserveArgs;
301  if (!argumentsMayEscape())
302  findPtrToConstParams(PreserveArgs, *this);
303 
304  for (unsigned Idx = 0, Count = getNumArgs(); Idx != Count; ++Idx) {
305  // Mark this region for invalidation. We batch invalidate regions
306  // below for efficiency.
307  if (PreserveArgs.count(Idx))
308  if (const MemRegion *MR = getArgSVal(Idx).getAsRegion())
309  ETraits.setTrait(MR->getBaseRegion(),
311  // TODO: Factor this out + handle the lower level const pointers.
312 
313  ValuesToInvalidate.push_back(getArgSVal(Idx));
314 
315  // If a function accepts an object by argument (which would of course be a
316  // temporary that isn't lifetime-extended), invalidate the object itself,
317  // not only other objects reachable from it. This is necessary because the
318  // destructor has access to the temporary object after the call.
319  // TODO: Support placement arguments once we start
320  // constructing them directly.
321  // TODO: This is unnecessary when there's no destructor, but that's
322  // currently hard to figure out.
323  if (getKind() != CE_CXXAllocator)
325  if (auto AdjIdx = getAdjustedParameterIndex(Idx))
326  if (const VarRegion *VR = getParameterLocation(*AdjIdx))
327  ValuesToInvalidate.push_back(loc::MemRegionVal(VR));
328  }
329 
330  // Invalidate designated regions using the batch invalidation API.
331  // NOTE: Even if RegionsToInvalidate is empty, we may still invalidate
332  // global variables.
333  return Result->invalidateRegions(ValuesToInvalidate, getOriginExpr(),
334  BlockCount, getLocationContext(),
335  /*CausedByPointerEscape*/ true,
336  /*Symbols=*/nullptr, this, &ETraits);
337 }
338 
340  const ProgramPointTag *Tag) const {
341  if (const Expr *E = getOriginExpr()) {
342  if (IsPreVisit)
343  return PreStmt(E, getLocationContext(), Tag);
344  return PostStmt(E, getLocationContext(), Tag);
345  }
346 
347  const Decl *D = getDecl();
348  assert(D && "Cannot get a program point without a statement or decl");
349 
351  if (IsPreVisit)
352  return PreImplicitCall(D, Loc, getLocationContext(), Tag);
353  return PostImplicitCall(D, Loc, getLocationContext(), Tag);
354 }
355 
356 bool CallEvent::isCalled(const CallDescription &CD) const {
357  // FIXME: Add ObjC Message support.
358  if (getKind() == CE_ObjCMessage)
359  return false;
360  if (!CD.IsLookupDone) {
361  CD.IsLookupDone = true;
362  CD.II = &getState()->getStateManager().getContext().Idents.get(
363  CD.getFunctionName());
364  }
365  const IdentifierInfo *II = getCalleeIdentifier();
366  if (!II || II != CD.II)
367  return false;
368 
369  const Decl *D = getDecl();
370  // If CallDescription provides prefix names, use them to improve matching
371  // accuracy.
372  if (CD.QualifiedName.size() > 1 && D) {
373  const DeclContext *Ctx = D->getDeclContext();
374  // See if we'll be able to match them all.
375  size_t NumUnmatched = CD.QualifiedName.size() - 1;
376  for (; Ctx && isa<NamedDecl>(Ctx); Ctx = Ctx->getParent()) {
377  if (NumUnmatched == 0)
378  break;
379 
380  if (const auto *ND = dyn_cast<NamespaceDecl>(Ctx)) {
381  if (ND->getName() == CD.QualifiedName[NumUnmatched - 1])
382  --NumUnmatched;
383  continue;
384  }
385 
386  if (const auto *RD = dyn_cast<RecordDecl>(Ctx)) {
387  if (RD->getName() == CD.QualifiedName[NumUnmatched - 1])
388  --NumUnmatched;
389  continue;
390  }
391  }
392 
393  if (NumUnmatched > 0)
394  return false;
395  }
396 
397  return (CD.RequiredArgs == CallDescription::NoArgRequirement ||
398  CD.RequiredArgs == getNumArgs());
399 }
400 
401 SVal CallEvent::getArgSVal(unsigned Index) const {
402  const Expr *ArgE = getArgExpr(Index);
403  if (!ArgE)
404  return UnknownVal();
405  return getSVal(ArgE);
406 }
407 
409  const Expr *ArgE = getArgExpr(Index);
410  if (!ArgE)
411  return {};
412  return ArgE->getSourceRange();
413 }
414 
416  const Expr *E = getOriginExpr();
417  if (!E)
418  return UndefinedVal();
419  return getSVal(E);
420 }
421 
422 LLVM_DUMP_METHOD void CallEvent::dump() const { dump(llvm::errs()); }
423 
424 void CallEvent::dump(raw_ostream &Out) const {
425  ASTContext &Ctx = getState()->getStateManager().getContext();
426  if (const Expr *E = getOriginExpr()) {
427  E->printPretty(Out, nullptr, Ctx.getPrintingPolicy());
428  Out << "\n";
429  return;
430  }
431 
432  if (const Decl *D = getDecl()) {
433  Out << "Call to ";
434  D->print(Out, Ctx.getPrintingPolicy());
435  return;
436  }
437 
438  // FIXME: a string representation of the kind would be nice.
439  Out << "Unknown call (type " << getKind() << ")";
440 }
441 
442 bool CallEvent::isCallStmt(const Stmt *S) {
443  return isa<CallExpr>(S) || isa<ObjCMessageExpr>(S)
444  || isa<CXXConstructExpr>(S)
445  || isa<CXXNewExpr>(S);
446 }
447 
449  assert(D);
450  if (const auto *FD = dyn_cast<FunctionDecl>(D))
451  return FD->getReturnType();
452  if (const auto *MD = dyn_cast<ObjCMethodDecl>(D))
453  return MD->getReturnType();
454  if (const auto *BD = dyn_cast<BlockDecl>(D)) {
455  // Blocks are difficult because the return type may not be stored in the
456  // BlockDecl itself. The AST should probably be enhanced, but for now we
457  // just do what we can.
458  // If the block is declared without an explicit argument list, the
459  // signature-as-written just includes the return type, not the entire
460  // function type.
461  // FIXME: All blocks should have signatures-as-written, even if the return
462  // type is inferred. (That's signified with a dependent result type.)
463  if (const TypeSourceInfo *TSI = BD->getSignatureAsWritten()) {
464  QualType Ty = TSI->getType();
465  if (const FunctionType *FT = Ty->getAs<FunctionType>())
466  Ty = FT->getReturnType();
467  if (!Ty->isDependentType())
468  return Ty;
469  }
470 
471  return {};
472  }
473 
474  llvm_unreachable("unknown callable kind");
475 }
476 
477 bool CallEvent::isVariadic(const Decl *D) {
478  assert(D);
479 
480  if (const auto *FD = dyn_cast<FunctionDecl>(D))
481  return FD->isVariadic();
482  if (const auto *MD = dyn_cast<ObjCMethodDecl>(D))
483  return MD->isVariadic();
484  if (const auto *BD = dyn_cast<BlockDecl>(D))
485  return BD->isVariadic();
486 
487  llvm_unreachable("unknown callable kind");
488 }
489 
490 static void addParameterValuesToBindings(const StackFrameContext *CalleeCtx,
491  CallEvent::BindingsTy &Bindings,
492  SValBuilder &SVB,
493  const CallEvent &Call,
495  MemRegionManager &MRMgr = SVB.getRegionManager();
496 
497  // If the function has fewer parameters than the call has arguments, we simply
498  // do not bind any values to them.
499  unsigned NumArgs = Call.getNumArgs();
500  unsigned Idx = 0;
501  ArrayRef<ParmVarDecl*>::iterator I = parameters.begin(), E = parameters.end();
502  for (; I != E && Idx < NumArgs; ++I, ++Idx) {
503  const ParmVarDecl *ParamDecl = *I;
504  assert(ParamDecl && "Formal parameter has no decl?");
505 
506  // TODO: Support allocator calls.
507  if (Call.getKind() != CE_CXXAllocator)
508  if (Call.isArgumentConstructedDirectly(Idx))
509  continue;
510 
511  // TODO: Allocators should receive the correct size and possibly alignment,
512  // determined in compile-time but not represented as arg-expressions,
513  // which makes getArgSVal() fail and return UnknownVal.
514  SVal ArgVal = Call.getArgSVal(Idx);
515  if (!ArgVal.isUnknown()) {
516  Loc ParamLoc = SVB.makeLoc(MRMgr.getVarRegion(ParamDecl, CalleeCtx));
517  Bindings.push_back(std::make_pair(ParamLoc, ArgVal));
518  }
519  }
520 
521  // FIXME: Variadic arguments are not handled at all right now.
522 }
523 
525  const FunctionDecl *D = getDecl();
526  if (!D)
527  return None;
528  return D->parameters();
529 }
530 
532  const FunctionDecl *FD = getDecl();
533  if (!FD)
534  return {};
535 
536  // Note that the AnalysisDeclContext will have the FunctionDecl with
537  // the definition (if one exists).
538  AnalysisDeclContext *AD =
540  getManager()->getContext(FD);
541  bool IsAutosynthesized;
542  Stmt* Body = AD->getBody(IsAutosynthesized);
543  LLVM_DEBUG({
544  if (IsAutosynthesized)
545  llvm::dbgs() << "Using autosynthesized body for " << FD->getName()
546  << "\n";
547  });
548  if (Body) {
549  const Decl* Decl = AD->getDecl();
550  return RuntimeDefinition(Decl);
551  }
552 
553  SubEngine &Engine = getState()->getStateManager().getOwningEngine();
554  AnalyzerOptions &Opts = Engine.getAnalysisManager().options;
555 
556  // Try to get CTU definition only if CTUDir is provided.
557  if (!Opts.IsNaiveCTUEnabled)
558  return {};
559 
562  llvm::Expected<const FunctionDecl *> CTUDeclOrError =
563  CTUCtx.getCrossTUDefinition(FD, Opts.CTUDir, Opts.CTUIndexName,
564  Opts.DisplayCTUProgress);
565 
566  if (!CTUDeclOrError) {
567  handleAllErrors(CTUDeclOrError.takeError(),
568  [&](const cross_tu::IndexError &IE) {
569  CTUCtx.emitCrossTUDiagnostics(IE);
570  });
571  return {};
572  }
573 
574  return RuntimeDefinition(*CTUDeclOrError);
575 }
576 
578  const StackFrameContext *CalleeCtx,
579  BindingsTy &Bindings) const {
580  const auto *D = cast<FunctionDecl>(CalleeCtx->getDecl());
581  SValBuilder &SVB = getState()->getStateManager().getSValBuilder();
582  addParameterValuesToBindings(CalleeCtx, Bindings, SVB, *this,
583  D->parameters());
584 }
585 
588  return true;
589 
590  const FunctionDecl *D = getDecl();
591  if (!D)
592  return true;
593 
594  const IdentifierInfo *II = D->getIdentifier();
595  if (!II)
596  return false;
597 
598  // This set of "escaping" APIs is
599 
600  // - 'int pthread_setspecific(ptheread_key k, const void *)' stores a
601  // value into thread local storage. The value can later be retrieved with
602  // 'void *ptheread_getspecific(pthread_key)'. So even thought the
603  // parameter is 'const void *', the region escapes through the call.
604  if (II->isStr("pthread_setspecific"))
605  return true;
606 
607  // - xpc_connection_set_context stores a value which can be retrieved later
608  // with xpc_connection_get_context.
609  if (II->isStr("xpc_connection_set_context"))
610  return true;
611 
612  // - funopen - sets a buffer for future IO calls.
613  if (II->isStr("funopen"))
614  return true;
615 
616  // - __cxa_demangle - can reallocate memory and can return the pointer to
617  // the input buffer.
618  if (II->isStr("__cxa_demangle"))
619  return true;
620 
621  StringRef FName = II->getName();
622 
623  // - CoreFoundation functions that end with "NoCopy" can free a passed-in
624  // buffer even if it is const.
625  if (FName.endswith("NoCopy"))
626  return true;
627 
628  // - NSXXInsertXX, for example NSMapInsertIfAbsent, since they can
629  // be deallocated by NSMapRemove.
630  if (FName.startswith("NS") && (FName.find("Insert") != StringRef::npos))
631  return true;
632 
633  // - Many CF containers allow objects to escape through custom
634  // allocators/deallocators upon container construction. (PR12101)
635  if (FName.startswith("CF") || FName.startswith("CG")) {
636  return StrInStrNoCase(FName, "InsertValue") != StringRef::npos ||
637  StrInStrNoCase(FName, "AddValue") != StringRef::npos ||
638  StrInStrNoCase(FName, "SetValue") != StringRef::npos ||
639  StrInStrNoCase(FName, "WithData") != StringRef::npos ||
640  StrInStrNoCase(FName, "AppendValue") != StringRef::npos ||
641  StrInStrNoCase(FName, "SetAttribute") != StringRef::npos;
642  }
643 
644  return false;
645 }
646 
648  const FunctionDecl *D = getOriginExpr()->getDirectCallee();
649  if (D)
650  return D;
651 
652  return getSVal(getOriginExpr()->getCallee()).getAsFunctionDecl();
653 }
654 
656  const auto *CE = cast_or_null<CallExpr>(getOriginExpr());
657  if (!CE)
658  return AnyFunctionCall::getDecl();
659 
660  const FunctionDecl *D = CE->getDirectCallee();
661  if (D)
662  return D;
663 
664  return getSVal(CE->getCallee()).getAsFunctionDecl();
665 }
666 
668  ValueList &Values, RegionAndSymbolInvalidationTraits *ETraits) const {
669  SVal ThisVal = getCXXThisVal();
670  Values.push_back(ThisVal);
671 
672  // Don't invalidate if the method is const and there are no mutable fields.
673  if (const auto *D = cast_or_null<CXXMethodDecl>(getDecl())) {
674  if (!D->isConst())
675  return;
676  // Get the record decl for the class of 'This'. D->getParent() may return a
677  // base class decl, rather than the class of the instance which needs to be
678  // checked for mutable fields.
679  // TODO: We might as well look at the dynamic type of the object.
680  const Expr *Ex = getCXXThisExpr()->ignoreParenBaseCasts();
681  QualType T = Ex->getType();
682  if (T->isPointerType()) // Arrow or implicit-this syntax?
683  T = T->getPointeeType();
684  const CXXRecordDecl *ParentRecord = T->getAsCXXRecordDecl();
685  assert(ParentRecord);
686  if (ParentRecord->hasMutableFields())
687  return;
688  // Preserve CXXThis.
689  const MemRegion *ThisRegion = ThisVal.getAsRegion();
690  if (!ThisRegion)
691  return;
692 
693  ETraits->setTrait(ThisRegion->getBaseRegion(),
695  }
696 }
697 
699  const Expr *Base = getCXXThisExpr();
700  // FIXME: This doesn't handle an overloaded ->* operator.
701  if (!Base)
702  return UnknownVal();
703 
704  SVal ThisVal = getSVal(Base);
705  assert(ThisVal.isUnknownOrUndef() || ThisVal.getAs<Loc>());
706  return ThisVal;
707 }
708 
709 RuntimeDefinition CXXInstanceCall::getRuntimeDefinition() const {
710  // Do we have a decl at all?
711  const Decl *D = getDecl();
712  if (!D)
713  return {};
714 
715  // If the method is non-virtual, we know we can inline it.
716  const auto *MD = cast<CXXMethodDecl>(D);
717  if (!MD->isVirtual())
719 
720  // Do we know the implicit 'this' object being called?
721  const MemRegion *R = getCXXThisVal().getAsRegion();
722  if (!R)
723  return {};
724 
725  // Do we know anything about the type of 'this'?
726  DynamicTypeInfo DynType = getDynamicTypeInfo(getState(), R);
727  if (!DynType.isValid())
728  return {};
729 
730  // Is the type a C++ class? (This is mostly a defensive check.)
731  QualType RegionType = DynType.getType()->getPointeeType();
732  assert(!RegionType.isNull() && "DynamicTypeInfo should always be a pointer.");
733 
734  const CXXRecordDecl *RD = RegionType->getAsCXXRecordDecl();
735  if (!RD || !RD->hasDefinition())
736  return {};
737 
738  // Find the decl for this method in that class.
739  const CXXMethodDecl *Result = MD->getCorrespondingMethodInClass(RD, true);
740  if (!Result) {
741  // We might not even get the original statically-resolved method due to
742  // some particularly nasty casting (e.g. casts to sister classes).
743  // However, we should at least be able to search up and down our own class
744  // hierarchy, and some real bugs have been caught by checking this.
745  assert(!RD->isDerivedFrom(MD->getParent()) && "Couldn't find known method");
746 
747  // FIXME: This is checking that our DynamicTypeInfo is at least as good as
748  // the static type. However, because we currently don't update
749  // DynamicTypeInfo when an object is cast, we can't actually be sure the
750  // DynamicTypeInfo is up to date. This assert should be re-enabled once
751  // this is fixed. <rdar://problem/12287087>
752  //assert(!MD->getParent()->isDerivedFrom(RD) && "Bad DynamicTypeInfo");
753 
754  return {};
755  }
756 
757  // Does the decl that we found have an implementation?
758  const FunctionDecl *Definition;
759  if (!Result->hasBody(Definition))
760  return {};
761 
762  // We found a definition. If we're not sure that this devirtualization is
763  // actually what will happen at runtime, make sure to provide the region so
764  // that ExprEngine can decide what to do with it.
765  if (DynType.canBeASubClass())
766  return RuntimeDefinition(Definition, R->StripCasts());
767  return RuntimeDefinition(Definition, /*DispatchRegion=*/nullptr);
768 }
769 
771  const StackFrameContext *CalleeCtx,
772  BindingsTy &Bindings) const {
774 
775  // Handle the binding of 'this' in the new stack frame.
776  SVal ThisVal = getCXXThisVal();
777  if (!ThisVal.isUnknown()) {
778  ProgramStateManager &StateMgr = getState()->getStateManager();
779  SValBuilder &SVB = StateMgr.getSValBuilder();
780 
781  const auto *MD = cast<CXXMethodDecl>(CalleeCtx->getDecl());
782  Loc ThisLoc = SVB.getCXXThis(MD, CalleeCtx);
783 
784  // If we devirtualized to a different member function, we need to make sure
785  // we have the proper layering of CXXBaseObjectRegions.
786  if (MD->getCanonicalDecl() != getDecl()->getCanonicalDecl()) {
787  ASTContext &Ctx = SVB.getContext();
788  const CXXRecordDecl *Class = MD->getParent();
789  QualType Ty = Ctx.getPointerType(Ctx.getRecordType(Class));
790 
791  // FIXME: CallEvent maybe shouldn't be directly accessing StoreManager.
792  bool Failed;
793  ThisVal = StateMgr.getStoreManager().attemptDownCast(ThisVal, Ty, Failed);
794  if (Failed) {
795  // We might have suffered some sort of placement new earlier, so
796  // we're constructing in a completely unexpected storage.
797  // Fall back to a generic pointer cast for this-value.
798  const CXXMethodDecl *StaticMD = cast<CXXMethodDecl>(getDecl());
799  const CXXRecordDecl *StaticClass = StaticMD->getParent();
800  QualType StaticTy = Ctx.getPointerType(Ctx.getRecordType(StaticClass));
801  ThisVal = SVB.evalCast(ThisVal, Ty, StaticTy);
802  }
803  }
804 
805  if (!ThisVal.isUnknown())
806  Bindings.push_back(std::make_pair(ThisLoc, ThisVal));
807  }
808 }
809 
811  return getOriginExpr()->getImplicitObjectArgument();
812 }
813 
814 RuntimeDefinition CXXMemberCall::getRuntimeDefinition() const {
815  // C++11 [expr.call]p1: ...If the selected function is non-virtual, or if the
816  // id-expression in the class member access expression is a qualified-id,
817  // that function is called. Otherwise, its final overrider in the dynamic type
818  // of the object expression is called.
819  if (const auto *ME = dyn_cast<MemberExpr>(getOriginExpr()->getCallee()))
820  if (ME->hasQualifier())
822 
824 }
825 
827  return getOriginExpr()->getArg(0);
828 }
829 
830 const BlockDataRegion *BlockCall::getBlockRegion() const {
831  const Expr *Callee = getOriginExpr()->getCallee();
832  const MemRegion *DataReg = getSVal(Callee).getAsRegion();
833 
834  return dyn_cast_or_null<BlockDataRegion>(DataReg);
835 }
836 
838  const BlockDecl *D = getDecl();
839  if (!D)
840  return None;
841  return D->parameters();
842 }
843 
845  RegionAndSymbolInvalidationTraits *ETraits) const {
846  // FIXME: This also needs to invalidate captured globals.
847  if (const MemRegion *R = getBlockRegion())
848  Values.push_back(loc::MemRegionVal(R));
849 }
850 
852  BindingsTy &Bindings) const {
853  SValBuilder &SVB = getState()->getStateManager().getSValBuilder();
854  ArrayRef<ParmVarDecl*> Params;
855  if (isConversionFromLambda()) {
856  auto *LambdaOperatorDecl = cast<CXXMethodDecl>(CalleeCtx->getDecl());
857  Params = LambdaOperatorDecl->parameters();
858 
859  // For blocks converted from a C++ lambda, the callee declaration is the
860  // operator() method on the lambda so we bind "this" to
861  // the lambda captured by the block.
862  const VarRegion *CapturedLambdaRegion = getRegionStoringCapturedLambda();
863  SVal ThisVal = loc::MemRegionVal(CapturedLambdaRegion);
864  Loc ThisLoc = SVB.getCXXThis(LambdaOperatorDecl, CalleeCtx);
865  Bindings.push_back(std::make_pair(ThisLoc, ThisVal));
866  } else {
867  Params = cast<BlockDecl>(CalleeCtx->getDecl())->parameters();
868  }
869 
870  addParameterValuesToBindings(CalleeCtx, Bindings, SVB, *this,
871  Params);
872 }
873 
875  if (Data)
876  return loc::MemRegionVal(static_cast<const MemRegion *>(Data));
877  return UnknownVal();
878 }
879 
881  RegionAndSymbolInvalidationTraits *ETraits) const {
882  if (Data) {
883  loc::MemRegionVal MV(static_cast<const MemRegion *>(Data));
884  if (SymbolRef Sym = MV.getAsSymbol(true))
885  ETraits->setTrait(Sym,
887  Values.push_back(MV);
888  }
889 }
890 
892  const StackFrameContext *CalleeCtx,
893  BindingsTy &Bindings) const {
895 
896  SVal ThisVal = getCXXThisVal();
897  if (!ThisVal.isUnknown()) {
898  SValBuilder &SVB = getState()->getStateManager().getSValBuilder();
899  const auto *MD = cast<CXXMethodDecl>(CalleeCtx->getDecl());
900  Loc ThisLoc = SVB.getCXXThis(MD, CalleeCtx);
901  Bindings.push_back(std::make_pair(ThisLoc, ThisVal));
902  }
903 }
904 
906  if (Data)
907  return loc::MemRegionVal(DtorDataTy::getFromOpaqueValue(Data).getPointer());
908  return UnknownVal();
909 }
910 
911 RuntimeDefinition CXXDestructorCall::getRuntimeDefinition() const {
912  // Base destructors are always called non-virtually.
913  // Skip CXXInstanceCall's devirtualization logic in this case.
914  if (isBaseDestructor())
916 
918 }
919 
921  const ObjCMethodDecl *D = getDecl();
922  if (!D)
923  return None;
924  return D->parameters();
925 }
926 
928  ValueList &Values, RegionAndSymbolInvalidationTraits *ETraits) const {
929 
930  // If the method call is a setter for property known to be backed by
931  // an instance variable, don't invalidate the entire receiver, just
932  // the storage for that instance variable.
933  if (const ObjCPropertyDecl *PropDecl = getAccessedProperty()) {
934  if (const ObjCIvarDecl *PropIvar = PropDecl->getPropertyIvarDecl()) {
935  SVal IvarLVal = getState()->getLValue(PropIvar, getReceiverSVal());
936  if (const MemRegion *IvarRegion = IvarLVal.getAsRegion()) {
937  ETraits->setTrait(
938  IvarRegion,
940  ETraits->setTrait(
941  IvarRegion,
943  Values.push_back(IvarLVal);
944  }
945  return;
946  }
947  }
948 
949  Values.push_back(getReceiverSVal());
950 }
951 
953  const LocationContext *LCtx = getLocationContext();
954  const ImplicitParamDecl *SelfDecl = LCtx->getSelfDecl();
955  if (!SelfDecl)
956  return SVal();
957  return getState()->getSVal(getState()->getRegion(SelfDecl, LCtx));
958 }
959 
961  // FIXME: Is this the best way to handle class receivers?
962  if (!isInstanceMessage())
963  return UnknownVal();
964 
965  if (const Expr *RecE = getOriginExpr()->getInstanceReceiver())
966  return getSVal(RecE);
967 
968  // An instance message with no expression means we are sending to super.
969  // In this case the object reference is the same as 'self'.
970  assert(getOriginExpr()->getReceiverKind() == ObjCMessageExpr::SuperInstance);
971  SVal SelfVal = getSelfSVal();
972  assert(SelfVal.isValid() && "Calling super but not in ObjC method");
973  return SelfVal;
974 }
975 
977  if (getOriginExpr()->getReceiverKind() == ObjCMessageExpr::SuperInstance ||
978  getOriginExpr()->getReceiverKind() == ObjCMessageExpr::SuperClass)
979  return true;
980 
981  if (!isInstanceMessage())
982  return false;
983 
984  SVal RecVal = getSVal(getOriginExpr()->getInstanceReceiver());
985 
986  return (RecVal == getSelfSVal());
987 }
988 
990  switch (getMessageKind()) {
991  case OCM_Message:
992  return getOriginExpr()->getSourceRange();
993  case OCM_PropertyAccess:
994  case OCM_Subscript:
995  return getContainingPseudoObjectExpr()->getSourceRange();
996  }
997  llvm_unreachable("unknown message kind");
998 }
999 
1000 using ObjCMessageDataTy = llvm::PointerIntPair<const PseudoObjectExpr *, 2>;
1001 
1002 const PseudoObjectExpr *ObjCMethodCall::getContainingPseudoObjectExpr() const {
1003  assert(Data && "Lazy lookup not yet performed.");
1004  assert(getMessageKind() != OCM_Message && "Explicit message send.");
1005  return ObjCMessageDataTy::getFromOpaqueValue(Data).getPointer();
1006 }
1007 
1008 static const Expr *
1010  const Expr *Syntactic = POE->getSyntacticForm();
1011 
1012  // This handles the funny case of assigning to the result of a getter.
1013  // This can happen if the getter returns a non-const reference.
1014  if (const auto *BO = dyn_cast<BinaryOperator>(Syntactic))
1015  Syntactic = BO->getLHS();
1016 
1017  return Syntactic;
1018 }
1019 
1021  if (!Data) {
1022  // Find the parent, ignoring implicit casts.
1024  const Stmt *S = PM.getParentIgnoreParenCasts(getOriginExpr());
1025 
1026  // Check if parent is a PseudoObjectExpr.
1027  if (const auto *POE = dyn_cast_or_null<PseudoObjectExpr>(S)) {
1028  const Expr *Syntactic = getSyntacticFromForPseudoObjectExpr(POE);
1029 
1030  ObjCMessageKind K;
1031  switch (Syntactic->getStmtClass()) {
1032  case Stmt::ObjCPropertyRefExprClass:
1033  K = OCM_PropertyAccess;
1034  break;
1035  case Stmt::ObjCSubscriptRefExprClass:
1036  K = OCM_Subscript;
1037  break;
1038  default:
1039  // FIXME: Can this ever happen?
1040  K = OCM_Message;
1041  break;
1042  }
1043 
1044  if (K != OCM_Message) {
1045  const_cast<ObjCMethodCall *>(this)->Data
1046  = ObjCMessageDataTy(POE, K).getOpaqueValue();
1047  assert(getMessageKind() == K);
1048  return K;
1049  }
1050  }
1051 
1052  const_cast<ObjCMethodCall *>(this)->Data
1053  = ObjCMessageDataTy(nullptr, 1).getOpaqueValue();
1054  assert(getMessageKind() == OCM_Message);
1055  return OCM_Message;
1056  }
1057 
1058  ObjCMessageDataTy Info = ObjCMessageDataTy::getFromOpaqueValue(Data);
1059  if (!Info.getPointer())
1060  return OCM_Message;
1061  return static_cast<ObjCMessageKind>(Info.getInt());
1062 }
1063 
1065  // Look for properties accessed with property syntax (foo.bar = ...)
1066  if ( getMessageKind() == OCM_PropertyAccess) {
1067  const PseudoObjectExpr *POE = getContainingPseudoObjectExpr();
1068  assert(POE && "Property access without PseudoObjectExpr?");
1069 
1070  const Expr *Syntactic = getSyntacticFromForPseudoObjectExpr(POE);
1071  auto *RefExpr = cast<ObjCPropertyRefExpr>(Syntactic);
1072 
1073  if (RefExpr->isExplicitProperty())
1074  return RefExpr->getExplicitProperty();
1075  }
1076 
1077  // Look for properties accessed with method syntax ([foo setBar:...]).
1078  const ObjCMethodDecl *MD = getDecl();
1079  if (!MD || !MD->isPropertyAccessor())
1080  return nullptr;
1081 
1082  // Note: This is potentially quite slow.
1083  return MD->findPropertyDecl();
1084 }
1085 
1087  Selector Sel) const {
1088  assert(IDecl);
1089  AnalysisManager &AMgr =
1090  getState()->getStateManager().getOwningEngine().getAnalysisManager();
1091  // If the class interface is declared inside the main file, assume it is not
1092  // subcassed.
1093  // TODO: It could actually be subclassed if the subclass is private as well.
1094  // This is probably very rare.
1095  SourceLocation InterfLoc = IDecl->getEndOfDefinitionLoc();
1096  if (InterfLoc.isValid() && AMgr.isInCodeFile(InterfLoc))
1097  return false;
1098 
1099  // Assume that property accessors are not overridden.
1100  if (getMessageKind() == OCM_PropertyAccess)
1101  return false;
1102 
1103  // We assume that if the method is public (declared outside of main file) or
1104  // has a parent which publicly declares the method, the method could be
1105  // overridden in a subclass.
1106 
1107  // Find the first declaration in the class hierarchy that declares
1108  // the selector.
1109  ObjCMethodDecl *D = nullptr;
1110  while (true) {
1111  D = IDecl->lookupMethod(Sel, true);
1112 
1113  // Cannot find a public definition.
1114  if (!D)
1115  return false;
1116 
1117  // If outside the main file,
1118  if (D->getLocation().isValid() && !AMgr.isInCodeFile(D->getLocation()))
1119  return true;
1120 
1121  if (D->isOverriding()) {
1122  // Search in the superclass on the next iteration.
1123  IDecl = D->getClassInterface();
1124  if (!IDecl)
1125  return false;
1126 
1127  IDecl = IDecl->getSuperClass();
1128  if (!IDecl)
1129  return false;
1130 
1131  continue;
1132  }
1133 
1134  return false;
1135  };
1136 
1137  llvm_unreachable("The while loop should always terminate.");
1138 }
1139 
1141  if (!MD)
1142  return MD;
1143 
1144  // Find the redeclaration that defines the method.
1145  if (!MD->hasBody()) {
1146  for (auto I : MD->redecls())
1147  if (I->hasBody())
1148  MD = cast<ObjCMethodDecl>(I);
1149  }
1150  return MD;
1151 }
1152 
1153 static bool isCallToSelfClass(const ObjCMessageExpr *ME) {
1154  const Expr* InstRec = ME->getInstanceReceiver();
1155  if (!InstRec)
1156  return false;
1157  const auto *InstRecIg = dyn_cast<DeclRefExpr>(InstRec->IgnoreParenImpCasts());
1158 
1159  // Check that receiver is called 'self'.
1160  if (!InstRecIg || !InstRecIg->getFoundDecl() ||
1161  !InstRecIg->getFoundDecl()->getName().equals("self"))
1162  return false;
1163 
1164  // Check that the method name is 'class'.
1165  if (ME->getSelector().getNumArgs() != 0 ||
1166  !ME->getSelector().getNameForSlot(0).equals("class"))
1167  return false;
1168 
1169  return true;
1170 }
1171 
1172 RuntimeDefinition ObjCMethodCall::getRuntimeDefinition() const {
1173  const ObjCMessageExpr *E = getOriginExpr();
1174  assert(E);
1175  Selector Sel = E->getSelector();
1176 
1177  if (E->isInstanceMessage()) {
1178  // Find the receiver type.
1179  const ObjCObjectPointerType *ReceiverT = nullptr;
1180  bool CanBeSubClassed = false;
1181  QualType SupersType = E->getSuperType();
1182  const MemRegion *Receiver = nullptr;
1183 
1184  if (!SupersType.isNull()) {
1185  // The receiver is guaranteed to be 'super' in this case.
1186  // Super always means the type of immediate predecessor to the method
1187  // where the call occurs.
1188  ReceiverT = cast<ObjCObjectPointerType>(SupersType);
1189  } else {
1190  Receiver = getReceiverSVal().getAsRegion();
1191  if (!Receiver)
1192  return {};
1193 
1194  DynamicTypeInfo DTI = getDynamicTypeInfo(getState(), Receiver);
1195  if (!DTI.isValid()) {
1196  assert(isa<AllocaRegion>(Receiver) &&
1197  "Unhandled untyped region class!");
1198  return {};
1199  }
1200 
1201  QualType DynType = DTI.getType();
1202  CanBeSubClassed = DTI.canBeASubClass();
1203  ReceiverT = dyn_cast<ObjCObjectPointerType>(DynType.getCanonicalType());
1204 
1205  if (ReceiverT && CanBeSubClassed)
1206  if (ObjCInterfaceDecl *IDecl = ReceiverT->getInterfaceDecl())
1207  if (!canBeOverridenInSubclass(IDecl, Sel))
1208  CanBeSubClassed = false;
1209  }
1210 
1211  // Handle special cases of '[self classMethod]' and
1212  // '[[self class] classMethod]', which are treated by the compiler as
1213  // instance (not class) messages. We will statically dispatch to those.
1214  if (auto *PT = dyn_cast_or_null<ObjCObjectPointerType>(ReceiverT)) {
1215  // For [self classMethod], return the compiler visible declaration.
1216  if (PT->getObjectType()->isObjCClass() &&
1217  Receiver == getSelfSVal().getAsRegion())
1218  return RuntimeDefinition(findDefiningRedecl(E->getMethodDecl()));
1219 
1220  // Similarly, handle [[self class] classMethod].
1221  // TODO: We are currently doing a syntactic match for this pattern with is
1222  // limiting as the test cases in Analysis/inlining/InlineObjCClassMethod.m
1223  // shows. A better way would be to associate the meta type with the symbol
1224  // using the dynamic type info tracking and use it here. We can add a new
1225  // SVal for ObjC 'Class' values that know what interface declaration they
1226  // come from. Then 'self' in a class method would be filled in with
1227  // something meaningful in ObjCMethodCall::getReceiverSVal() and we could
1228  // do proper dynamic dispatch for class methods just like we do for
1229  // instance methods now.
1230  if (E->getInstanceReceiver())
1231  if (const auto *M = dyn_cast<ObjCMessageExpr>(E->getInstanceReceiver()))
1232  if (isCallToSelfClass(M))
1233  return RuntimeDefinition(findDefiningRedecl(E->getMethodDecl()));
1234  }
1235 
1236  // Lookup the instance method implementation.
1237  if (ReceiverT)
1238  if (ObjCInterfaceDecl *IDecl = ReceiverT->getInterfaceDecl()) {
1239  // Repeatedly calling lookupPrivateMethod() is expensive, especially
1240  // when in many cases it returns null. We cache the results so
1241  // that repeated queries on the same ObjCIntefaceDecl and Selector
1242  // don't incur the same cost. On some test cases, we can see the
1243  // same query being issued thousands of times.
1244  //
1245  // NOTE: This cache is essentially a "global" variable, but it
1246  // only gets lazily created when we get here. The value of the
1247  // cache probably comes from it being global across ExprEngines,
1248  // where the same queries may get issued. If we are worried about
1249  // concurrency, or possibly loading/unloading ASTs, etc., we may
1250  // need to revisit this someday. In terms of memory, this table
1251  // stays around until clang quits, which also may be bad if we
1252  // need to release memory.
1253  using PrivateMethodKey = std::pair<const ObjCInterfaceDecl *, Selector>;
1254  using PrivateMethodCache =
1255  llvm::DenseMap<PrivateMethodKey, Optional<const ObjCMethodDecl *>>;
1256 
1257  static PrivateMethodCache PMC;
1258  Optional<const ObjCMethodDecl *> &Val = PMC[std::make_pair(IDecl, Sel)];
1259 
1260  // Query lookupPrivateMethod() if the cache does not hit.
1261  if (!Val.hasValue()) {
1262  Val = IDecl->lookupPrivateMethod(Sel);
1263 
1264  // If the method is a property accessor, we should try to "inline" it
1265  // even if we don't actually have an implementation.
1266  if (!*Val)
1267  if (const ObjCMethodDecl *CompileTimeMD = E->getMethodDecl())
1268  if (CompileTimeMD->isPropertyAccessor()) {
1269  if (!CompileTimeMD->getSelfDecl() &&
1270  isa<ObjCCategoryDecl>(CompileTimeMD->getDeclContext())) {
1271  // If the method is an accessor in a category, and it doesn't
1272  // have a self declaration, first
1273  // try to find the method in a class extension. This
1274  // works around a bug in Sema where multiple accessors
1275  // are synthesized for properties in class
1276  // extensions that are redeclared in a category and the
1277  // the implicit parameters are not filled in for
1278  // the method on the category.
1279  // This ensures we find the accessor in the extension, which
1280  // has the implicit parameters filled in.
1281  auto *ID = CompileTimeMD->getClassInterface();
1282  for (auto *CatDecl : ID->visible_extensions()) {
1283  Val = CatDecl->getMethod(Sel,
1284  CompileTimeMD->isInstanceMethod());
1285  if (*Val)
1286  break;
1287  }
1288  }
1289  if (!*Val)
1290  Val = IDecl->lookupInstanceMethod(Sel);
1291  }
1292  }
1293 
1294  const ObjCMethodDecl *MD = Val.getValue();
1295  if (CanBeSubClassed)
1296  return RuntimeDefinition(MD, Receiver);
1297  else
1298  return RuntimeDefinition(MD, nullptr);
1299  }
1300  } else {
1301  // This is a class method.
1302  // If we have type info for the receiver class, we are calling via
1303  // class name.
1304  if (ObjCInterfaceDecl *IDecl = E->getReceiverInterface()) {
1305  // Find/Return the method implementation.
1306  return RuntimeDefinition(IDecl->lookupPrivateClassMethod(Sel));
1307  }
1308  }
1309 
1310  return {};
1311 }
1312 
1314  if (isInSystemHeader() && !isInstanceMessage()) {
1315  Selector Sel = getSelector();
1316  if (Sel.getNumArgs() == 1 &&
1317  Sel.getIdentifierInfoForSlot(0)->isStr("valueWithPointer"))
1318  return true;
1319  }
1320 
1322 }
1323 
1325  const StackFrameContext *CalleeCtx,
1326  BindingsTy &Bindings) const {
1327  const auto *D = cast<ObjCMethodDecl>(CalleeCtx->getDecl());
1328  SValBuilder &SVB = getState()->getStateManager().getSValBuilder();
1329  addParameterValuesToBindings(CalleeCtx, Bindings, SVB, *this,
1330  D->parameters());
1331 
1332  SVal SelfVal = getReceiverSVal();
1333  if (!SelfVal.isUnknown()) {
1334  const VarDecl *SelfD = CalleeCtx->getAnalysisDeclContext()->getSelfDecl();
1335  MemRegionManager &MRMgr = SVB.getRegionManager();
1336  Loc SelfLoc = SVB.makeLoc(MRMgr.getVarRegion(SelfD, CalleeCtx));
1337  Bindings.push_back(std::make_pair(SelfLoc, SelfVal));
1338  }
1339 }
1340 
1341 CallEventRef<>
1343  const LocationContext *LCtx) {
1344  if (const auto *MCE = dyn_cast<CXXMemberCallExpr>(CE))
1345  return create<CXXMemberCall>(MCE, State, LCtx);
1346 
1347  if (const auto *OpCE = dyn_cast<CXXOperatorCallExpr>(CE)) {
1348  const FunctionDecl *DirectCallee = OpCE->getDirectCallee();
1349  if (const auto *MD = dyn_cast<CXXMethodDecl>(DirectCallee))
1350  if (MD->isInstance())
1351  return create<CXXMemberOperatorCall>(OpCE, State, LCtx);
1352 
1353  } else if (CE->getCallee()->getType()->isBlockPointerType()) {
1354  return create<BlockCall>(CE, State, LCtx);
1355  }
1356 
1357  // Otherwise, it's a normal function call, static member function call, or
1358  // something we can't reason about.
1359  return create<SimpleFunctionCall>(CE, State, LCtx);
1360 }
1361 
1362 CallEventRef<>
1364  ProgramStateRef State) {
1365  const LocationContext *ParentCtx = CalleeCtx->getParent();
1366  const LocationContext *CallerCtx = ParentCtx->getStackFrame();
1367  assert(CallerCtx && "This should not be used for top-level stack frames");
1368 
1369  const Stmt *CallSite = CalleeCtx->getCallSite();
1370 
1371  if (CallSite) {
1372  if (CallEventRef<> Out = getCall(CallSite, State, CallerCtx))
1373  return Out;
1374 
1375  // All other cases are handled by getCall.
1376  assert(isa<CXXConstructExpr>(CallSite) &&
1377  "This is not an inlineable statement");
1378 
1379  SValBuilder &SVB = State->getStateManager().getSValBuilder();
1380  const auto *Ctor = cast<CXXMethodDecl>(CalleeCtx->getDecl());
1381  Loc ThisPtr = SVB.getCXXThis(Ctor, CalleeCtx);
1382  SVal ThisVal = State->getSVal(ThisPtr);
1383 
1384  return getCXXConstructorCall(cast<CXXConstructExpr>(CallSite),
1385  ThisVal.getAsRegion(), State, CallerCtx);
1386  }
1387 
1388  // Fall back to the CFG. The only thing we haven't handled yet is
1389  // destructors, though this could change in the future.
1390  const CFGBlock *B = CalleeCtx->getCallSiteBlock();
1391  CFGElement E = (*B)[CalleeCtx->getIndex()];
1392  assert((E.getAs<CFGImplicitDtor>() || E.getAs<CFGTemporaryDtor>()) &&
1393  "All other CFG elements should have exprs");
1394 
1395  SValBuilder &SVB = State->getStateManager().getSValBuilder();
1396  const auto *Dtor = cast<CXXDestructorDecl>(CalleeCtx->getDecl());
1397  Loc ThisPtr = SVB.getCXXThis(Dtor, CalleeCtx);
1398  SVal ThisVal = State->getSVal(ThisPtr);
1399 
1400  const Stmt *Trigger;
1402  Trigger = AutoDtor->getTriggerStmt();
1403  else if (Optional<CFGDeleteDtor> DeleteDtor = E.getAs<CFGDeleteDtor>())
1404  Trigger = DeleteDtor->getDeleteExpr();
1405  else
1406  Trigger = Dtor->getBody();
1407 
1408  return getCXXDestructorCall(Dtor, Trigger, ThisVal.getAsRegion(),
1409  E.getAs<CFGBaseDtor>().hasValue(), State,
1410  CallerCtx);
1411 }
1412 
1413 CallEventRef<> CallEventManager::getCall(const Stmt *S, ProgramStateRef State,
1414  const LocationContext *LC) {
1415  if (const auto *CE = dyn_cast<CallExpr>(S)) {
1416  return getSimpleCall(CE, State, LC);
1417  } else if (const auto *NE = dyn_cast<CXXNewExpr>(S)) {
1418  return getCXXAllocatorCall(NE, State, LC);
1419  } else if (const auto *ME = dyn_cast<ObjCMessageExpr>(S)) {
1420  return getObjCMethodCall(ME, State, LC);
1421  } else {
1422  return nullptr;
1423  }
1424 }
The receiver is the instance of the superclass object.
Definition: ExprObjC.h:1061
Defines the clang::ASTContext interface.
SVal getSelfSVal() const
Return the value of &#39;self&#39; if available.
Definition: CallEvent.cpp:952
const VarRegion * getParameterLocation(unsigned Index) const
Returns memory location for a parameter variable within the callee stack frame.
Definition: CallEvent.cpp:224
SVal getReceiverSVal() const
Returns the value of the receiver at the time of this call.
Definition: CallEvent.cpp:960
void getExtraInvalidatedValues(ValueList &Values, RegionAndSymbolInvalidationTraits *ETraits) const override
Definition: CallEvent.cpp:880
Represents a function declaration or definition.
Definition: Decl.h:1738
Expr * getSyntacticForm()
Return the syntactic form of this expression, i.e.
Definition: Expr.h:5343
Smart pointer class that efficiently represents Objective-C method names.
PointerType - C99 6.7.5.1 - Pointer Declarators.
Definition: Type.h:2540
A (possibly-)qualified type.
Definition: Type.h:638
MemRegion - The root abstract class for all memory regions.
Definition: MemRegion.h:95
bool isBlockPointerType() const
Definition: Type.h:6307
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:586
Selector getSelector() const
Definition: ExprObjC.cpp:312
ObjCInterfaceDecl * getClassInterface()
Definition: DeclObjC.cpp:1144
Stmt * getBody() const
Get the body of the Declaration.
const SymExpr * SymbolRef
static const Expr * getSyntacticFromForPseudoObjectExpr(const PseudoObjectExpr *POE)
Definition: CallEvent.cpp:1009
Stmt - This represents one statement.
Definition: Stmt.h:66
Information about invalidation for a particular region/symbol.
Definition: MemRegion.h:1443
ProgramPoint getProgramPoint(bool IsPreVisit=false, const ProgramPointTag *Tag=nullptr) const
Returns an appropriate ProgramPoint for this call.
Definition: CallEvent.cpp:339
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3358
static bool isCallToSelfClass(const ObjCMessageExpr *ME)
Definition: CallEvent.cpp:1153
QualType getPointeeType() const
If this is a pointer, ObjC object pointer, or block pointer, this returns the respective pointee...
Definition: Type.cpp:505
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:87
const RecordType * getAsStructureType() const
Definition: Type.cpp:521
IntrusiveRefCntPtr< const ProgramState > ProgramStateRef
Represents C++ object destructor generated from a call to delete.
Definition: CFG.h:409
SourceRange getSourceRange() const override
Definition: CallEvent.cpp:989
Represents a program point just before an implicit call event.
Definition: ProgramPoint.h:585
A container of type source information.
Definition: Decl.h:87
CallEventRef getSimpleCall(const CallExpr *E, ProgramStateRef State, const LocationContext *LCtx)
Definition: CallEvent.cpp:1342
virtual RuntimeDefinition getRuntimeDefinition() const =0
Returns the definition of the function or method that will be called.
void getInitialStackFrameContents(const StackFrameContext *CalleeCtx, BindingsTy &Bindings) const override
Definition: CallEvent.cpp:770
Expr * ignoreParenBaseCasts() LLVM_READONLY
Ignore parentheses and derived-to-base casts.
Definition: Expr.cpp:2676
bool isOverriding() const
Whether this method overrides any other in the class hierarchy.
Definition: DeclObjC.h:450
const Expr * getOriginExpr() const
Returns the expression whose value will be the result of this call.
Definition: CallEvent.h:255
Represents a variable declaration or definition.
Definition: Decl.h:813
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6755
void setTrait(SymbolRef Sym, InvalidationKinds IK)
Definition: MemRegion.cpp:1582
SVal getSVal(const Stmt *S) const
Get the value of arbitrary expressions at this point in the path.
Definition: CallEvent.h:215
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:826
ArrayRef< ParmVarDecl * > parameters() const override
Return call&#39;s formal parameters.
Definition: CallEvent.cpp:524
Represents a parameter to a function.
Definition: Decl.h:1550
Defines the clang::Expr interface and subclasses for C++ expressions.
void getExtraInvalidatedValues(ValueList &Values, RegionAndSymbolInvalidationTraits *ETraits) const override
Definition: CallEvent.cpp:844
IdentifierInfo * getIdentifier() const
Get the identifier that names this declaration, if there is one.
Definition: Decl.h:270
Represents a struct/union/class.
Definition: Decl.h:3593
One of these records is kept for each identifier that is lexed.
RuntimeDefinition getRuntimeDefinition() const override
Definition: CallEvent.cpp:814
param_type_iterator param_type_end() const
Definition: CallEvent.h:482
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:155
field_range fields() const
Definition: Decl.h:3784
AnalysisDeclContext contains the context data for the function or method under analysis.
Represents C++ object destructor implicitly generated for automatic object or temporary bound to cons...
Definition: CFG.h:384
bool isReferenceType() const
Definition: Type.h:6311
virtual const Expr * getArgExpr(unsigned Index) const
Returns the expression associated with a given argument.
Definition: CallEvent.h:305
bool isObjCSelType() const
Definition: Type.h:6437
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:2262
static void addParameterValuesToBindings(const StackFrameContext *CalleeCtx, CallEvent::BindingsTy &Bindings, SValBuilder &SVB, const CallEvent &Call, ArrayRef< ParmVarDecl *> parameters)
Definition: CallEvent.cpp:490
Represents any expression that calls an Objective-C method.
Definition: CallEvent.h:970
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:274
const clang::PrintingPolicy & getPrintingPolicy() const
Definition: ASTContext.h:654
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:260
static const ObjCMethodDecl * findDefiningRedecl(const ObjCMethodDecl *MD)
Definition: CallEvent.cpp:1140
SVal getReturnValue() const
Returns the return value of the call.
Definition: CallEvent.cpp:415
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:506
param_type_iterator param_type_begin() const
Returns an iterator over the types of the call&#39;s formal parameters.
Definition: CallEvent.h:478
Represents an ObjC class declaration.
Definition: DeclObjC.h:1172
static bool isVariadic(const Decl *D)
Returns true if the given decl is known to be variadic.
Definition: CallEvent.cpp:477
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:870
virtual ArrayRef< ParmVarDecl * > parameters() const =0
Return call&#39;s formal parameters.
const CFGBlock * getCallSiteBlock() const
SmallVectorImpl< FrameBindingTy > BindingsTy
Definition: CallEvent.h:384
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:810
ObjCMessageKind
Represents the ways an Objective-C message send can occur.
Definition: CallEvent.h:961
bool isReceiverSelfOrSuper() const
Checks if the receiver refers to &#39;self&#39; or &#39;super&#39;.
Definition: CallEvent.cpp:976
CXXRecordDecl * getAsCXXRecordDecl() const
Retrieves the CXXRecordDecl that this type refers to, either because the type is a RecordType or beca...
Definition: Type.cpp:1613
const Stmt * getCallSite() const
ArrayRef< ParmVarDecl * > parameters() const override
Definition: CallEvent.cpp:920
Represents a single basic block in a source-level CFG.
Definition: CFG.h:552
bool argumentsMayEscape() const override
Definition: CallEvent.cpp:1313
ArrayRef< ParmVarDecl * > parameters() const override
Definition: CallEvent.cpp:837
AnalysisDeclContext * getContext(const Decl *D)
const LocationContext * getLocationContext() const
The context in which the call is being evaluated.
Definition: CallEvent.h:245
static bool isCallback(QualType T)
Definition: CallEvent.cpp:97
Pepresents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:3858
This represents one expression.
Definition: Expr.h:106
void getInitialStackFrameContents(const StackFrameContext *CalleeCtx, BindingsTy &Bindings) const override
Definition: CallEvent.cpp:1324
const FunctionDecl * getDecl() const override
Returns the declaration of the function or method that will be called.
Definition: CallEvent.cpp:647
CFGBlock * getBlock(Stmt *S)
Returns the CFGBlock the specified Stmt* appears in.
Definition: CFGStmtMap.cpp:27
CallEventRef getCaller(const StackFrameContext *CalleeCtx, ProgramStateRef State)
Gets an outside caller given a callee context.
Definition: CallEvent.cpp:1363
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.
Expr * getCallee()
Definition: Expr.h:2514
llvm::mapped_iterator< ArrayRef< ParmVarDecl * >::iterator, GetTypeFn > param_type_iterator
Definition: CallEvent.h:471
bool isInSystemHeader() const
Returns true if the callee is known to be from a system header.
Definition: CallEvent.h:267
StringRef getNameForSlot(unsigned argIndex) const
Retrieve the name at a given position in the selector.
DeclContext * getDeclContext()
Definition: DeclBase.h:427
ObjCInterfaceDecl * getSuperClass() const
Definition: DeclObjC.cpp:338
virtual SVal getCXXThisVal() const
Returns the value of the implicit &#39;this&#39; object.
Definition: CallEvent.cpp:698
const IdentifierInfo * getCalleeIdentifier() const
Returns the name of the callee, if its name is a simple identifier.
Definition: CallEvent.h:365
StringRef getFunctionName() const
Get the name of the function that this object matches.
Definition: CallEvent.h:106
void getInitialStackFrameContents(const StackFrameContext *CalleeCtx, BindingsTy &Bindings) const override
Definition: CallEvent.cpp:851
bool hasBody(const FunctionDecl *&Definition) const
Returns true if the function has a body.
Definition: Decl.cpp:2695
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:235
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1752
An expression that sends a message to the given Objective-C object or class.
Definition: ExprObjC.h:904
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:927
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:703
ParentMap & getParentMap() const
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:336
RuntimeDefinition getRuntimeDefinition() const override
Definition: CallEvent.cpp:709
bool isConstQualified() const
Determine whether this type is const-qualified.
Definition: Type.h:6134
virtual SourceRange getSourceRange() const
Returns a source range for the entire call, suitable for outputting in diagnostics.
Definition: CallEvent.h:296
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:577
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:134
QualType getCanonicalType() const
Definition: Type.h:6114
PseudoObjectExpr - An expression which accesses a pseudo-object l-value.
Definition: Expr.h:5299
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:667
Encodes a location in the source.
const FunctionDecl * getDecl() const override
Definition: CallEvent.cpp:655
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:442
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
bool isArgumentConstructedDirectly(unsigned Index) const
Returns true if on the current path, the argument was constructed by calling a C++ constructor over i...
Definition: CallEvent.h:434
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:2041
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:1016
const StackFrameContext * getStackFrame() const
Definition: MemRegion.cpp:158
const Decl * getDecl() const
bool isAnyPointerType() const
Definition: Type.h:6303
virtual Optional< unsigned > getAdjustedParameterIndex(unsigned ASTArgumentIndex) const
Some calls have parameter numbering mismatched from argument numbering.
Definition: CallEvent.h:445
Represents one property declaration in an Objective-C interface.
Definition: DeclObjC.h:729
RuntimeDefinition getRuntimeDefinition() const override
Definition: CallEvent.cpp:911
const ObjCMethodDecl * getMethodDecl() const
Definition: ExprObjC.h:1303
Tells that a region&#39;s contents is not changed.
Definition: MemRegion.h:1458
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:223
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.
CallEventRef getCall(const Stmt *S, ProgramStateRef State, const LocationContext *LC)
Gets a call event for a function call, Objective-C method call, or a &#39;new&#39; call.
Definition: CallEvent.cpp:1413
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:1207
static const unsigned NoArgRequirement
Definition: CallEvent.h:89
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: DeclBase.h:941
SVal getCXXThisVal() const
Returns the value of the implicit &#39;this&#39; object.
Definition: CallEvent.cpp:874
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:1086
const BlockDataRegion * getBlockRegion() const
Returns the region associated with this instance of the block.
Definition: CallEvent.cpp:830
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:408
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1262
Represents a program point just after an implicit call event.
Definition: ProgramPoint.h:602
DynamicTypeInfo getDynamicTypeInfo(ProgramStateRef State, const MemRegion *Reg)
Get dynamic type information for a region.
RuntimeDefinition getRuntimeDefinition() const override
Definition: CallEvent.cpp:1172
QualType getSuperType() const
Retrieve the type referred to by &#39;super&#39;.
Definition: ExprObjC.h:1283
StmtClass getStmtClass() const
Definition: Stmt.h:1029
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:2166
bool mayHaveOtherDefinitions()
Check if the definition we have is precise.
Definition: CallEvent.h:155
ObjCMessageKind getMessageKind() const
Returns how the message was written in the source (property access, subscript, or explicit message se...
Definition: CallEvent.cpp:1020
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:2693
Represents a pointer to an Objective C object.
Definition: Type.h:5797
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:4373
ObjCInterfaceDecl * getInterfaceDecl() const
If this pointer points to an Objective @interface type, gets the declaration for that interface...
Definition: Type.h:5853
bool hasBody() const override
Determine whether this method has a body.
Definition: DeclObjC.h:504
static QualType getDeclaredResultType(const Decl *D)
Returns the result type of a function or method declaration.
Definition: CallEvent.cpp:448
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:683
Stores options for the analyzer from the command line.
llvm::Expected< const FunctionDecl * > getCrossTUDefinition(const FunctionDecl *FD, StringRef CrossTUDir, StringRef IndexName, bool DisplayCTUProgress=false)
This function loads a function definition from an external AST file and merge it into the original AS...
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:1356
const ObjCPropertyDecl * findPropertyDecl(bool CheckOverrides=true) const
Returns the property associated with this method&#39;s selector.
Definition: DeclObjC.cpp:1302
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:240
Defines the clang::SourceLocation class and associated facilities.
Represents a C++ struct/union/class.
Definition: DeclCXX.h:300
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:6547
SVal getCXXThisVal() const override
Returns the value of the implicit &#39;this&#39; object.
Definition: CallEvent.cpp:905
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:356
ObjCIvarDecl - Represents an ObjC instance variable.
Definition: DeclObjC.h:1945
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:1000
QualType getPointerType(QualType T) const
Return the uniqued reference to the type for a pointer to the specified type.
SourceRange getSourceRange() const LLVM_READONLY
SourceLocation tokens are not useful in isolation - they are low level value objects created/interpre...
Definition: Stmt.cpp:276
CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]).
Definition: Expr.h:2396
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:276
const ObjCPropertyDecl * getAccessedProperty() const
Definition: CallEvent.cpp:1064
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:285
bool isDependentType() const
Whether this type is a dependent type, meaning that its definition somehow depends on a template para...
Definition: Type.h:2079
A reference to a declared variable, function, enum, etc.
Definition: Expr.h:1041
ArrayRef< ParmVarDecl * > parameters() const
Definition: Decl.h:3944
bool isPointerType() const
Definition: Type.h:6299
virtual SVal getArgSVal(unsigned Index) const
Returns the value of a given argument at the time of the call.
Definition: CallEvent.cpp:401
An l-value expression is a reference to an object with independent storage.
Definition: Specifiers.h:114
const void * Data
Definition: CallEvent.h:182
A trivial tuple used to represent a source range.
bool isPropertyAccessor() const
Definition: DeclObjC.h:432
AnalysisDeclContext * getAnalysisDeclContext() const
SourceLocation getEndOfDefinitionLoc() const
Definition: DeclObjC.h:1878
bool isFunctionPointerType() const
Definition: Type.h:6323
The receiver is a superclass.
Definition: ExprObjC.h:1058
bool isInstanceMessage() const
Determine whether this is an instance message to either a computed object or to super.
Definition: ExprObjC.h:1195
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:531
SourceLocation getLocation() const
Definition: DeclBase.h:418
ArrayRef< ParmVarDecl * > parameters() const
Definition: DeclObjC.h:367
void getInitialStackFrameContents(const StackFrameContext *CalleeCtx, BindingsTy &Bindings) const override
Definition: CallEvent.cpp:891
const StackFrameContext * getCalleeStackFrame() const
Returns the callee stack frame.
Definition: CallEvent.cpp:195
virtual AnalysisManager & getAnalysisManager()=0