clang 8.0.0

BodyFarm.cpp
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1 //== BodyFarm.cpp - Factory for conjuring up fake bodies ----------*- C++ -*-//
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 // BodyFarm is a factory for creating faux implementations for functions/methods
11 // for analysis purposes.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #include "clang/Analysis/BodyFarm.h"
16 #include "clang/AST/ASTContext.h"
17 #include "clang/AST/CXXInheritance.h"
18 #include "clang/AST/Decl.h"
19 #include "clang/AST/Expr.h"
20 #include "clang/AST/ExprCXX.h"
21 #include "clang/AST/ExprObjC.h"
22 #include "clang/AST/NestedNameSpecifier.h"
23 #include "clang/Analysis/CodeInjector.h"
24 #include "clang/Basic/OperatorKinds.h"
25 #include "llvm/ADT/StringSwitch.h"
26 #include "llvm/Support/Debug.h"
27
28 #define DEBUG_TYPE "body-farm"
29
30 using namespace clang;
31
32 //===----------------------------------------------------------------------===//
33 // Helper creation functions for constructing faux ASTs.
34 //===----------------------------------------------------------------------===//
35
36 static bool isDispatchBlock(QualType Ty) {
37 // Is it a block pointer?
38 const BlockPointerType *BPT = Ty->getAs<BlockPointerType>();
39 if (!BPT)
40 return false;
41
42 // Check if the block pointer type takes no arguments and
43 // returns void.
44 const FunctionProtoType *FT =
45 BPT->getPointeeType()->getAs<FunctionProtoType>();
46 return FT && FT->getReturnType()->isVoidType() && FT->getNumParams() == 0;
47 }
48
49 namespace {
50 class ASTMaker {
51 public:
52 ASTMaker(ASTContext &C) : C(C) {}
53
54 /// Create a new BinaryOperator representing a simple assignment.
55 BinaryOperator *makeAssignment(const Expr *LHS, const Expr *RHS, QualType Ty);
56
57 /// Create a new BinaryOperator representing a comparison.
58 BinaryOperator *makeComparison(const Expr *LHS, const Expr *RHS,
59 BinaryOperator::Opcode Op);
60
61 /// Create a new compound stmt using the provided statements.
62 CompoundStmt *makeCompound(ArrayRef<Stmt*>);
63
64 /// Create a new DeclRefExpr for the referenced variable.
65 DeclRefExpr *makeDeclRefExpr(const VarDecl *D,
66 bool RefersToEnclosingVariableOrCapture = false);
67
68 /// Create a new UnaryOperator representing a dereference.
69 UnaryOperator *makeDereference(const Expr *Arg, QualType Ty);
70
71 /// Create an implicit cast for an integer conversion.
72 Expr *makeIntegralCast(const Expr *Arg, QualType Ty);
73
74 /// Create an implicit cast to a builtin boolean type.
75 ImplicitCastExpr *makeIntegralCastToBoolean(const Expr *Arg);
76
77 /// Create an implicit cast for lvalue-to-rvaluate conversions.
78 ImplicitCastExpr *makeLvalueToRvalue(const Expr *Arg, QualType Ty);
79
80 /// Make RValue out of variable declaration, creating a temporary
81 /// DeclRefExpr in the process.
82 ImplicitCastExpr *
83 makeLvalueToRvalue(const VarDecl *Decl,
84 bool RefersToEnclosingVariableOrCapture = false);
85
86 /// Create an implicit cast of the given type.
87 ImplicitCastExpr *makeImplicitCast(const Expr *Arg, QualType Ty,
88 CastKind CK = CK_LValueToRValue);
89
90 /// Create an Objective-C bool literal.
91 ObjCBoolLiteralExpr *makeObjCBool(bool Val);
92
93 /// Create an Objective-C ivar reference.
94 ObjCIvarRefExpr *makeObjCIvarRef(const Expr *Base, const ObjCIvarDecl *IVar);
95
96 /// Create a Return statement.
97 ReturnStmt *makeReturn(const Expr *RetVal);
98
99 /// Create an integer literal expression of the given type.
100 IntegerLiteral *makeIntegerLiteral(uint64_t Value, QualType Ty);
101
102 /// Create a member expression.
103 MemberExpr *makeMemberExpression(Expr *base, ValueDecl *MemberDecl,
104 bool IsArrow = false,
105 ExprValueKind ValueKind = VK_LValue);
106
107 /// Returns a *first* member field of a record declaration with a given name.
108 /// \return an nullptr if no member with such a name exists.
109 ValueDecl *findMemberField(const RecordDecl *RD, StringRef Name);
110
111 private:
112 ASTContext &C;
113 };
114 }
115
116 BinaryOperator *ASTMaker::makeAssignment(const Expr *LHS, const Expr *RHS,
117 QualType Ty) {
118 return new (C) BinaryOperator(const_cast<Expr*>(LHS), const_cast<Expr*>(RHS),
119 BO_Assign, Ty, VK_RValue,
120 OK_Ordinary, SourceLocation(), FPOptions());
121 }
122
123 BinaryOperator *ASTMaker::makeComparison(const Expr *LHS, const Expr *RHS,
124 BinaryOperator::Opcode Op) {
125 assert(BinaryOperator::isLogicalOp(Op) ||
126 BinaryOperator::isComparisonOp(Op));
127 return new (C) BinaryOperator(const_cast<Expr*>(LHS),
128 const_cast<Expr*>(RHS),
129 Op,
130 C.getLogicalOperationType(),
131 VK_RValue,
132 OK_Ordinary, SourceLocation(), FPOptions());
133 }
134
135 CompoundStmt *ASTMaker::makeCompound(ArrayRef<Stmt *> Stmts) {
136 return CompoundStmt::Create(C, Stmts, SourceLocation(), SourceLocation());
137 }
138
139 DeclRefExpr *ASTMaker::makeDeclRefExpr(
140 const VarDecl *D,
141 bool RefersToEnclosingVariableOrCapture) {
142 QualType Type = D->getType().getNonReferenceType();
143
144 DeclRefExpr *DR = DeclRefExpr::Create(
145 C, NestedNameSpecifierLoc(), SourceLocation(), const_cast<VarDecl *>(D),
146 RefersToEnclosingVariableOrCapture, SourceLocation(), Type, VK_LValue);
147 return DR;
148 }
149
150 UnaryOperator *ASTMaker::makeDereference(const Expr *Arg, QualType Ty) {
151 return new (C) UnaryOperator(const_cast<Expr*>(Arg), UO_Deref, Ty,
152 VK_LValue, OK_Ordinary, SourceLocation(),
153 /*CanOverflow*/ false);
154 }
155
156 ImplicitCastExpr *ASTMaker::makeLvalueToRvalue(const Expr *Arg, QualType Ty) {
157 return makeImplicitCast(Arg, Ty, CK_LValueToRValue);
158 }
159
160 ImplicitCastExpr *
161 ASTMaker::makeLvalueToRvalue(const VarDecl *Arg,
162 bool RefersToEnclosingVariableOrCapture) {
163 QualType Type = Arg->getType().getNonReferenceType();
164 return makeLvalueToRvalue(makeDeclRefExpr(Arg,
165 RefersToEnclosingVariableOrCapture),
166 Type);
167 }
168
169 ImplicitCastExpr *ASTMaker::makeImplicitCast(const Expr *Arg, QualType Ty,
170 CastKind CK) {
171 return ImplicitCastExpr::Create(C, Ty,
172 /* CastKind=*/ CK,
173 /* Expr=*/ const_cast<Expr *>(Arg),
174 /* CXXCastPath=*/ nullptr,
175 /* ExprValueKind=*/ VK_RValue);
176 }
177
178 Expr *ASTMaker::makeIntegralCast(const Expr *Arg, QualType Ty) {
179 if (Arg->getType() == Ty)
180 return const_cast<Expr*>(Arg);
181
182 return ImplicitCastExpr::Create(C, Ty, CK_IntegralCast,
183 const_cast<Expr*>(Arg), nullptr, VK_RValue);
184 }
185
186 ImplicitCastExpr *ASTMaker::makeIntegralCastToBoolean(const Expr *Arg) {
187 return ImplicitCastExpr::Create(C, C.BoolTy, CK_IntegralToBoolean,
188 const_cast<Expr*>(Arg), nullptr, VK_RValue);
189 }
190
191 ObjCBoolLiteralExpr *ASTMaker::makeObjCBool(bool Val) {
192 QualType Ty = C.getBOOLDecl() ? C.getBOOLType() : C.ObjCBuiltinBoolTy;
193 return new (C) ObjCBoolLiteralExpr(Val, Ty, SourceLocation());
194 }
195
196 ObjCIvarRefExpr *ASTMaker::makeObjCIvarRef(const Expr *Base,
197 const ObjCIvarDecl *IVar) {
198 return new (C) ObjCIvarRefExpr(const_cast<ObjCIvarDecl*>(IVar),
199 IVar->getType(), SourceLocation(),
200 SourceLocation(), const_cast<Expr*>(Base),
201 /*arrow=*/true, /*free=*/false);
202 }
203
204 ReturnStmt *ASTMaker::makeReturn(const Expr *RetVal) {
205 return ReturnStmt::Create(C, SourceLocation(), const_cast<Expr *>(RetVal),
206 /* NRVOCandidate=*/nullptr);
207 }
208
209 IntegerLiteral *ASTMaker::makeIntegerLiteral(uint64_t Value, QualType Ty) {
210 llvm::APInt APValue = llvm::APInt(C.getTypeSize(Ty), Value);
211 return IntegerLiteral::Create(C, APValue, Ty, SourceLocation());
212 }
213
214 MemberExpr *ASTMaker::makeMemberExpression(Expr *base, ValueDecl *MemberDecl,
215 bool IsArrow,
216 ExprValueKind ValueKind) {
217
218 DeclAccessPair FoundDecl = DeclAccessPair::make(MemberDecl, AS_public);
219 return MemberExpr::Create(
220 C, base, IsArrow, SourceLocation(), NestedNameSpecifierLoc(),
221 SourceLocation(), MemberDecl, FoundDecl,
222 DeclarationNameInfo(MemberDecl->getDeclName(), SourceLocation()),
223 /* TemplateArgumentListInfo=*/ nullptr, MemberDecl->getType(), ValueKind,
224 OK_Ordinary);
225 }
226
227 ValueDecl *ASTMaker::findMemberField(const RecordDecl *RD, StringRef Name) {
228
229 CXXBasePaths Paths(
230 /* FindAmbiguities=*/false,
231 /* RecordPaths=*/false,
232 /* DetectVirtual=*/ false);
233 const IdentifierInfo &II = C.Idents.get(Name);
234 DeclarationName DeclName = C.DeclarationNames.getIdentifier(&II);
235
236 DeclContextLookupResult Decls = RD->lookup(DeclName);
237 for (NamedDecl *FoundDecl : Decls)
238 if (!FoundDecl->getDeclContext()->isFunctionOrMethod())
239 return cast<ValueDecl>(FoundDecl);
240
241 return nullptr;
242 }
243
244 //===----------------------------------------------------------------------===//
245 // Creation functions for faux ASTs.
246 //===----------------------------------------------------------------------===//
247
248 typedef Stmt *(*FunctionFarmer)(ASTContext &C, const FunctionDecl *D);
249
250 static CallExpr *create_call_once_funcptr_call(ASTContext &C, ASTMaker M,
251 const ParmVarDecl *Callback,
252 ArrayRef<Expr *> CallArgs) {
253
254 QualType Ty = Callback->getType();
255 DeclRefExpr *Call = M.makeDeclRefExpr(Callback);
256 Expr *SubExpr;
257 if (Ty->isRValueReferenceType()) {
258 SubExpr = M.makeImplicitCast(
259 Call, Ty.getNonReferenceType(), CK_LValueToRValue);
260 } else if (Ty->isLValueReferenceType() &&
261 Call->getType()->isFunctionType()) {
262 Ty = C.getPointerType(Ty.getNonReferenceType());
263 SubExpr = M.makeImplicitCast(Call, Ty, CK_FunctionToPointerDecay);
264 } else if (Ty->isLValueReferenceType()
265 && Call->getType()->isPointerType()
266 && Call->getType()->getPointeeType()->isFunctionType()){
267 SubExpr = Call;
268 } else {
269 llvm_unreachable("Unexpected state");
270 }
271
272 return CallExpr::Create(C, SubExpr, CallArgs, C.VoidTy, VK_RValue,
273 SourceLocation());
274 }
275
276 static CallExpr *create_call_once_lambda_call(ASTContext &C, ASTMaker M,
277 const ParmVarDecl *Callback,
278 CXXRecordDecl *CallbackDecl,
279 ArrayRef<Expr *> CallArgs) {
280 assert(CallbackDecl != nullptr);
281 assert(CallbackDecl->isLambda());
282 FunctionDecl *callOperatorDecl = CallbackDecl->getLambdaCallOperator();
283 assert(callOperatorDecl != nullptr);
284
285 DeclRefExpr *callOperatorDeclRef =
286 DeclRefExpr::Create(/* Ctx =*/ C,
287 /* QualifierLoc =*/ NestedNameSpecifierLoc(),
288 /* TemplateKWLoc =*/ SourceLocation(),
289 const_cast<FunctionDecl *>(callOperatorDecl),
290 /* RefersToEnclosingVariableOrCapture=*/ false,
291 /* NameLoc =*/ SourceLocation(),
292 /* T =*/ callOperatorDecl->getType(),
293 /* VK =*/ VK_LValue);
294
295 return CXXOperatorCallExpr::Create(
296 /*AstContext=*/C, OO_Call, callOperatorDeclRef,
297 /*args=*/CallArgs,
298 /*QualType=*/C.VoidTy,
299 /*ExprValueType=*/VK_RValue,
300 /*SourceLocation=*/SourceLocation(), FPOptions());
301 }
302
303 /// Create a fake body for std::call_once.
304 /// Emulates the following function body:
305 ///
306 /// \code
307 /// typedef struct once_flag_s {
308 /// unsigned long __state = 0;
309 /// } once_flag;
310 /// template<class Callable>
311 /// void call_once(once_flag& o, Callable func) {
312 /// if (!o.__state) {
313 /// func();
314 /// }
315 /// o.__state = 1;
316 /// }
317 /// \endcode
318 static Stmt *create_call_once(ASTContext &C, const FunctionDecl *D) {
319 LLVM_DEBUG(llvm::dbgs() << "Generating body for call_once\n");
320
321 // We need at least two parameters.
322 if (D->param_size() < 2)
323 return nullptr;
324
325 ASTMaker M(C);
326
327 const ParmVarDecl *Flag = D->getParamDecl(0);
328 const ParmVarDecl *Callback = D->getParamDecl(1);
329
330 if (!Callback->getType()->isReferenceType()) {
331 llvm::dbgs() << "libcxx03 std::call_once implementation, skipping.\n";
332 return nullptr;
333 }
334 if (!Flag->getType()->isReferenceType()) {
335 llvm::dbgs() << "unknown std::call_once implementation, skipping.\n";
336 return nullptr;
337 }
338
339 QualType CallbackType = Callback->getType().getNonReferenceType();
340
341 // Nullable pointer, non-null iff function is a CXXRecordDecl.
342 CXXRecordDecl *CallbackRecordDecl = CallbackType->getAsCXXRecordDecl();
343 QualType FlagType = Flag->getType().getNonReferenceType();
344 auto *FlagRecordDecl = FlagType->getAsRecordDecl();
345
346 if (!FlagRecordDecl) {
347 LLVM_DEBUG(llvm::dbgs() << "Flag field is not a record: "
348 << "unknown std::call_once implementation, "
349 << "ignoring the call.\n");
350 return nullptr;
351 }
352
353 // We initially assume libc++ implementation of call_once,
354 // where the once_flag struct has a field `__state_`.
355 ValueDecl *FlagFieldDecl = M.findMemberField(FlagRecordDecl, "__state_");
356
357 // Otherwise, try libstdc++ implementation, with a field
358 // `_M_once`
359 if (!FlagFieldDecl) {
360 FlagFieldDecl = M.findMemberField(FlagRecordDecl, "_M_once");
361 }
362
363 if (!FlagFieldDecl) {
364 LLVM_DEBUG(llvm::dbgs() << "No field _M_once or __state_ found on "
365 << "std::once_flag struct: unknown std::call_once "
366 << "implementation, ignoring the call.");
367 return nullptr;
368 }
369
370 bool isLambdaCall = CallbackRecordDecl && CallbackRecordDecl->isLambda();
371 if (CallbackRecordDecl && !isLambdaCall) {
372 LLVM_DEBUG(llvm::dbgs()
373 << "Not supported: synthesizing body for functors when "
374 << "body farming std::call_once, ignoring the call.");
375 return nullptr;
376 }
377
378 SmallVector<Expr *, 5> CallArgs;
379 const FunctionProtoType *CallbackFunctionType;
380 if (isLambdaCall) {
381
382 // Lambda requires callback itself inserted as a first parameter.
383 CallArgs.push_back(
384 M.makeDeclRefExpr(Callback,
385 /* RefersToEnclosingVariableOrCapture=*/ true));
386 CallbackFunctionType = CallbackRecordDecl->getLambdaCallOperator()
387 ->getType()
388 ->getAs<FunctionProtoType>();
389 } else if (!CallbackType->getPointeeType().isNull()) {
390 CallbackFunctionType =
391 CallbackType->getPointeeType()->getAs<FunctionProtoType>();
392 } else {
393 CallbackFunctionType = CallbackType->getAs<FunctionProtoType>();
394 }
395
396 if (!CallbackFunctionType)
397 return nullptr;
398
399 // First two arguments are used for the flag and for the callback.
400 if (D->getNumParams() != CallbackFunctionType->getNumParams() + 2) {
401 LLVM_DEBUG(llvm::dbgs() << "Types of params of the callback do not match "
402 << "params passed to std::call_once, "
403 << "ignoring the call\n");
404 return nullptr;
405 }
406
407 // All arguments past first two ones are passed to the callback,
408 // and we turn lvalues into rvalues if the argument is not passed by
409 // reference.
410 for (unsigned int ParamIdx = 2; ParamIdx < D->getNumParams(); ParamIdx++) {
411 const ParmVarDecl *PDecl = D->getParamDecl(ParamIdx);
412 if (PDecl &&
413 CallbackFunctionType->getParamType(ParamIdx - 2)
414 .getNonReferenceType()
415 .getCanonicalType() !=
416 PDecl->getType().getNonReferenceType().getCanonicalType()) {
417 LLVM_DEBUG(llvm::dbgs() << "Types of params of the callback do not match "
418 << "params passed to std::call_once, "
419 << "ignoring the call\n");
420 return nullptr;
421 }
422 Expr *ParamExpr = M.makeDeclRefExpr(PDecl);
423 if (!CallbackFunctionType->getParamType(ParamIdx - 2)->isReferenceType()) {
424 QualType PTy = PDecl->getType().getNonReferenceType();
425 ParamExpr = M.makeLvalueToRvalue(ParamExpr, PTy);
426 }
427 CallArgs.push_back(ParamExpr);
428 }
429
430 CallExpr *CallbackCall;
431 if (isLambdaCall) {
432
433 CallbackCall = create_call_once_lambda_call(C, M, Callback,
434 CallbackRecordDecl, CallArgs);
435 } else {
436
437 // Function pointer case.
438 CallbackCall = create_call_once_funcptr_call(C, M, Callback, CallArgs);
439 }
440
441 DeclRefExpr *FlagDecl =
442 M.makeDeclRefExpr(Flag,
443 /* RefersToEnclosingVariableOrCapture=*/true);
444
445
446 MemberExpr *Deref = M.makeMemberExpression(FlagDecl, FlagFieldDecl);
447 assert(Deref->isLValue());
448 QualType DerefType = Deref->getType();
449
450 // Negation predicate.
451 UnaryOperator *FlagCheck = new (C) UnaryOperator(
452 /* input=*/
453 M.makeImplicitCast(M.makeLvalueToRvalue(Deref, DerefType), DerefType,
454 CK_IntegralToBoolean),
455 /* opc=*/ UO_LNot,
456 /* QualType=*/ C.IntTy,
457 /* ExprValueKind=*/ VK_RValue,
458 /* ExprObjectKind=*/ OK_Ordinary, SourceLocation(),
459 /* CanOverflow*/ false);
460
461 // Create assignment.
462 BinaryOperator *FlagAssignment = M.makeAssignment(
463 Deref, M.makeIntegralCast(M.makeIntegerLiteral(1, C.IntTy), DerefType),
464 DerefType);
465
466 auto *Out =
467 IfStmt::Create(C, SourceLocation(),
468 /* IsConstexpr=*/false,
469 /* init=*/nullptr,
470 /* var=*/nullptr,
471 /* cond=*/FlagCheck,
472 /* then=*/M.makeCompound({CallbackCall, FlagAssignment}));
473
474 return Out;
475 }
476
477 /// Create a fake body for dispatch_once.
478 static Stmt *create_dispatch_once(ASTContext &C, const FunctionDecl *D) {
479 // Check if we have at least two parameters.
480 if (D->param_size() != 2)
481 return nullptr;
482
483 // Check if the first parameter is a pointer to integer type.
484 const ParmVarDecl *Predicate = D->getParamDecl(0);
485 QualType PredicateQPtrTy = Predicate->getType();
486 const PointerType *PredicatePtrTy = PredicateQPtrTy->getAs<PointerType>();
487 if (!PredicatePtrTy)
488 return nullptr;
489 QualType PredicateTy = PredicatePtrTy->getPointeeType();
490 if (!PredicateTy->isIntegerType())
491 return nullptr;
492
493 // Check if the second parameter is the proper block type.
494 const ParmVarDecl *Block = D->getParamDecl(1);
495 QualType Ty = Block->getType();
496 if (!isDispatchBlock(Ty))
497 return nullptr;
498
499 // Everything checks out. Create a fakse body that checks the predicate,
500 // sets it, and calls the block. Basically, an AST dump of:
501 //
502 // void dispatch_once(dispatch_once_t *predicate, dispatch_block_t block) {
503 // if (*predicate != ~0l) {
504 // *predicate = ~0l;
505 // block();
506 // }
507 // }
508
509 ASTMaker M(C);
510
511 // (1) Create the call.
512 CallExpr *CE = CallExpr::Create(
513 /*ASTContext=*/C,
514 /*StmtClass=*/M.makeLvalueToRvalue(/*Expr=*/Block),
515 /*args=*/None,
516 /*QualType=*/C.VoidTy,
517 /*ExprValueType=*/VK_RValue,
518 /*SourceLocation=*/SourceLocation());
519
520 // (2) Create the assignment to the predicate.
521 Expr *DoneValue =
522 new (C) UnaryOperator(M.makeIntegerLiteral(0, C.LongTy), UO_Not, C.LongTy,
523 VK_RValue, OK_Ordinary, SourceLocation(),
524 /*CanOverflow*/false);
525
526 BinaryOperator *B =
527 M.makeAssignment(
528 M.makeDereference(
529 M.makeLvalueToRvalue(
530 M.makeDeclRefExpr(Predicate), PredicateQPtrTy),
531 PredicateTy),
532 M.makeIntegralCast(DoneValue, PredicateTy),
533 PredicateTy);
534
535 // (3) Create the compound statement.
536 Stmt *Stmts[] = { B, CE };
537 CompoundStmt *CS = M.makeCompound(Stmts);
538
539 // (4) Create the 'if' condition.
540 ImplicitCastExpr *LValToRval =
541 M.makeLvalueToRvalue(
542 M.makeDereference(
543 M.makeLvalueToRvalue(
544 M.makeDeclRefExpr(Predicate),
545 PredicateQPtrTy),
546 PredicateTy),
547 PredicateTy);
548
549 Expr *GuardCondition = M.makeComparison(LValToRval, DoneValue, BO_NE);
550 // (5) Create the 'if' statement.
551 auto *If = IfStmt::Create(C, SourceLocation(),
552 /* IsConstexpr=*/false,
553 /* init=*/nullptr,
554 /* var=*/nullptr,
555 /* cond=*/GuardCondition,
556 /* then=*/CS);
557 return If;
558 }
559
560 /// Create a fake body for dispatch_sync.
561 static Stmt *create_dispatch_sync(ASTContext &C, const FunctionDecl *D) {
562 // Check if we have at least two parameters.
563 if (D->param_size() != 2)
564 return nullptr;
565
566 // Check if the second parameter is a block.
567 const ParmVarDecl *PV = D->getParamDecl(1);
568 QualType Ty = PV->getType();
569 if (!isDispatchBlock(Ty))
570 return nullptr;
571
572 // Everything checks out. Create a fake body that just calls the block.
573 // This is basically just an AST dump of:
574 //
575 // void dispatch_sync(dispatch_queue_t queue, void (^block)(void)) {
576 // block();
577 // }
578 //
579 ASTMaker M(C);
580 DeclRefExpr *DR = M.makeDeclRefExpr(PV);
581 ImplicitCastExpr *ICE = M.makeLvalueToRvalue(DR, Ty);
582 CallExpr *CE =
583 CallExpr::Create(C, ICE, None, C.VoidTy, VK_RValue, SourceLocation());
584 return CE;
585 }
586
587 static Stmt *create_OSAtomicCompareAndSwap(ASTContext &C, const FunctionDecl *D)
588 {
589 // There are exactly 3 arguments.
590 if (D->param_size() != 3)
591 return nullptr;
592
593 // Signature:
594 // _Bool OSAtomicCompareAndSwapPtr(void *__oldValue,
595 // void *__newValue,
596 // void * volatile *__theValue)
597 // Generate body:
598 // if (oldValue == *theValue) {
599 // *theValue = newValue;
600 // return YES;
601 // }
602 // else return NO;
603
604 QualType ResultTy = D->getReturnType();
605 bool isBoolean = ResultTy->isBooleanType();
606 if (!isBoolean && !ResultTy->isIntegralType(C))
607 return nullptr;
608
609 const ParmVarDecl *OldValue = D->getParamDecl(0);
610 QualType OldValueTy = OldValue->getType();
611
612 const ParmVarDecl *NewValue = D->getParamDecl(1);
613 QualType NewValueTy = NewValue->getType();
614
615 assert(OldValueTy == NewValueTy);
616
617 const ParmVarDecl *TheValue = D->getParamDecl(2);
618 QualType TheValueTy = TheValue->getType();
619 const PointerType *PT = TheValueTy->getAs<PointerType>();
620 if (!PT)
621 return nullptr;
622 QualType PointeeTy = PT->getPointeeType();
623
624 ASTMaker M(C);
625 // Construct the comparison.
626 Expr *Comparison =
627 M.makeComparison(
628 M.makeLvalueToRvalue(M.makeDeclRefExpr(OldValue), OldValueTy),
629 M.makeLvalueToRvalue(
630 M.makeDereference(
631 M.makeLvalueToRvalue(M.makeDeclRefExpr(TheValue), TheValueTy),
632 PointeeTy),
633 PointeeTy),
634 BO_EQ);
635
636 // Construct the body of the IfStmt.
637 Stmt *Stmts[2];
638 Stmts[0] =
639 M.makeAssignment(
640 M.makeDereference(
641 M.makeLvalueToRvalue(M.makeDeclRefExpr(TheValue), TheValueTy),
642 PointeeTy),
643 M.makeLvalueToRvalue(M.makeDeclRefExpr(NewValue), NewValueTy),
644 NewValueTy);
645
646 Expr *BoolVal = M.makeObjCBool(true);
647 Expr *RetVal = isBoolean ? M.makeIntegralCastToBoolean(BoolVal)
648 : M.makeIntegralCast(BoolVal, ResultTy);
649 Stmts[1] = M.makeReturn(RetVal);
650 CompoundStmt *Body = M.makeCompound(Stmts);
651
652 // Construct the else clause.
653 BoolVal = M.makeObjCBool(false);
654 RetVal = isBoolean ? M.makeIntegralCastToBoolean(BoolVal)
655 : M.makeIntegralCast(BoolVal, ResultTy);
656 Stmt *Else = M.makeReturn(RetVal);
657
658 /// Construct the If.
659 auto *If = IfStmt::Create(C, SourceLocation(),
660 /* IsConstexpr=*/false,
661 /* init=*/nullptr,
662 /* var=*/nullptr, Comparison, Body,
663 SourceLocation(), Else);
664
665 return If;
666 }
667
668 Stmt *BodyFarm::getBody(const FunctionDecl *D) {
669 D = D->getCanonicalDecl();
670
671 Optional<Stmt *> &Val = Bodies[D];
672 if (Val.hasValue())
673 return Val.getValue();
674
675 Val = nullptr;
676
677 if (D->getIdentifier() == nullptr)
678 return nullptr;
679
680 StringRef Name = D->getName();
681 if (Name.empty())
682 return nullptr;
683
684 FunctionFarmer FF;
685
686 if (Name.startswith("OSAtomicCompareAndSwap") ||
687 Name.startswith("objc_atomicCompareAndSwap")) {
688 FF = create_OSAtomicCompareAndSwap;
689 } else if (Name == "call_once" && D->getDeclContext()->isStdNamespace()) {
690 FF = create_call_once;
691 } else {
692 FF = llvm::StringSwitch<FunctionFarmer>(Name)
693 .Case("dispatch_sync", create_dispatch_sync)
694 .Case("dispatch_once", create_dispatch_once)
695 .Default(nullptr);
696 }
697
698 if (FF) { Val = FF(C, D); }
699 else if (Injector) { Val = Injector->getBody(D); }
700 return Val.getValue();
701 }
702
703 static const ObjCIvarDecl *findBackingIvar(const ObjCPropertyDecl *Prop) {
704 const ObjCIvarDecl *IVar = Prop->getPropertyIvarDecl();
705
706 if (IVar)
707 return IVar;
708
709 // When a readonly property is shadowed in a class extensions with a
710 // a readwrite property, the instance variable belongs to the shadowing
711 // property rather than the shadowed property. If there is no instance
712 // variable on a readonly property, check to see whether the property is
713 // shadowed and if so try to get the instance variable from shadowing
714 // property.
715 if (!Prop->isReadOnly())
716 return nullptr;
717
718 auto *Container = cast<ObjCContainerDecl>(Prop->getDeclContext());
719 const ObjCInterfaceDecl *PrimaryInterface = nullptr;
720 if (auto *InterfaceDecl = dyn_cast<ObjCInterfaceDecl>(Container)) {
721 PrimaryInterface = InterfaceDecl;
722 } else if (auto *CategoryDecl = dyn_cast<ObjCCategoryDecl>(Container)) {
723 PrimaryInterface = CategoryDecl->getClassInterface();
724 } else if (auto *ImplDecl = dyn_cast<ObjCImplDecl>(Container)) {
725 PrimaryInterface = ImplDecl->getClassInterface();
726 } else {
727 return nullptr;
728 }
729
730 // FindPropertyVisibleInPrimaryClass() looks first in class extensions, so it
731 // is guaranteed to find the shadowing property, if it exists, rather than
732 // the shadowed property.
733 auto *ShadowingProp = PrimaryInterface->FindPropertyVisibleInPrimaryClass(
734 Prop->getIdentifier(), Prop->getQueryKind());
735 if (ShadowingProp && ShadowingProp != Prop) {
736 IVar = ShadowingProp->getPropertyIvarDecl();
737 }
738
739 return IVar;
740 }
741
742 static Stmt *createObjCPropertyGetter(ASTContext &Ctx,
743 const ObjCPropertyDecl *Prop) {
744 // First, find the backing ivar.
745 const ObjCIvarDecl *IVar = findBackingIvar(Prop);
746 if (!IVar)
747 return nullptr;
748
749 // Ignore weak variables, which have special behavior.
750 if (Prop->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_weak)
751 return nullptr;
752
753 // Look to see if Sema has synthesized a body for us. This happens in
754 // Objective-C++ because the return value may be a C++ class type with a
755 // non-trivial copy constructor. We can only do this if we can find the
756 // @synthesize for this property, though (or if we know it's been auto-
757 // synthesized).
758 const ObjCImplementationDecl *ImplDecl =
759 IVar->getContainingInterface()->getImplementation();
760 if (ImplDecl) {
761 for (const auto *I : ImplDecl->property_impls()) {
762 if (I->getPropertyDecl() != Prop)
763 continue;
764
765 if (I->getGetterCXXConstructor()) {
766 ASTMaker M(Ctx);
767 return M.makeReturn(I->getGetterCXXConstructor());
768 }
769 }
770 }
771
772 // Sanity check that the property is the same type as the ivar, or a
773 // reference to it, and that it is either an object pointer or trivially
774 // copyable.
775 if (!Ctx.hasSameUnqualifiedType(IVar->getType(),
776 Prop->getType().getNonReferenceType()))
777 return nullptr;
778 if (!IVar->getType()->isObjCLifetimeType() &&
779 !IVar->getType().isTriviallyCopyableType(Ctx))
780 return nullptr;
781
782 // Generate our body:
783 // return self->_ivar;
784 ASTMaker M(Ctx);
785
786 const VarDecl *selfVar = Prop->getGetterMethodDecl()->getSelfDecl();
787 if (!selfVar)
788 return nullptr;
789
790 Expr *loadedIVar =
791 M.makeObjCIvarRef(
792 M.makeLvalueToRvalue(
793 M.makeDeclRefExpr(selfVar),
794 selfVar->getType()),
795 IVar);
796
797 if (!Prop->getType()->isReferenceType())
798 loadedIVar = M.makeLvalueToRvalue(loadedIVar, IVar->getType());
799
800 return M.makeReturn(loadedIVar);
801 }
802
803 Stmt *BodyFarm::getBody(const ObjCMethodDecl *D) {
804 // We currently only know how to synthesize property accessors.
805 if (!D->isPropertyAccessor())
806 return nullptr;
807
808 D = D->getCanonicalDecl();
809
810 Optional<Stmt *> &Val = Bodies[D];
811 if (Val.hasValue())
812 return Val.getValue();
813 Val = nullptr;
814
815 const ObjCPropertyDecl *Prop = D->findPropertyDecl();
816 if (!Prop)
817 return nullptr;
818
819 // For now, we only synthesize getters.
820 // Synthesizing setters would cause false negatives in the
821 // RetainCountChecker because the method body would bind the parameter
822 // to an instance variable, causing it to escape. This would prevent
823 // warning in the following common scenario:
824 //
825 // id foo = [[NSObject alloc] init];
826 // self.foo = foo; // We should warn that foo leaks here.
827 //
828 if (D->param_size() != 0)
829 return nullptr;
830
831 Val = createObjCPropertyGetter(C, Prop);
832
833 return Val.getValue();
834 }
ASTContext.h
Defines the clang::ASTContext interface.
clang::ObjCPropertyDecl::getQueryKind
ObjCPropertyQueryKind getQueryKind() const
Definition: DeclObjC.h:881
clang::FunctionDecl
Represents a function declaration or definition.
Definition: Decl.h:1738
clang::PointerType
PointerType - C99 6.7.5.1 - Pointer Declarators.
Definition: Type.h:2537
clang::PointerType::getPointeeType
QualType getPointeeType() const
Definition: Type.h:2550
clang::QualType
A (possibly-)qualified type.
Definition: Type.h:638
clang::ObjCMethodDecl::param_size
unsigned param_size() const
Definition: DeclObjC.h:341
clang::Stmt
Stmt - This represents one statement.
Definition: Stmt.h:66
clang::Type::getPointeeType
QualType getPointeeType() const
If this is a pointer, ObjC object pointer, or block pointer, this returns the respective pointee...
Definition: Type.cpp:505
Base
clang::BinaryOperator::isLogicalOp
bool isLogicalOp() const
Definition: Expr.h:3408
clang::Decl
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:87
create_call_once
static Stmt * create_call_once(ASTContext &C, const FunctionDecl *D)
Create a fake body for std::call_once.
Definition: BodyFarm.cpp:318
create_call_once_funcptr_call
static CallExpr * create_call_once_funcptr_call(ASTContext &C, ASTMaker M, const ParmVarDecl *Callback, ArrayRef< Expr *> CallArgs)
Definition: BodyFarm.cpp:250
clang::QualType::getNonReferenceType
QualType getNonReferenceType() const
If Type is a reference type (e.g., const int&), returns the type that the reference refers to ("const...
Definition: Type.h:6245
clang::IntegerLiteral
Definition: Expr.h:1308
clang::Type
The base class of the type hierarchy.
Definition: Type.h:1407
clang::ASTContext::LongTy
CanQualType LongTy
Definition: ASTContext.h:1025
CXXInheritance.h
clang::FPOptions
Floating point control options.
Definition: LangOptions.h:307
clang::FunctionDecl::param_size
size_t param_size() const
Definition: Decl.h:2278
clang::CXXOperatorCallExpr::Create
static CXXOperatorCallExpr * Create(const ASTContext &Ctx, OverloadedOperatorKind OpKind, Expr *Fn, ArrayRef< Expr *> Args, QualType Ty, ExprValueKind VK, SourceLocation OperatorLoc, FPOptions FPFeatures, ADLCallKind UsesADL=NotADL)
Definition: ExprCXX.cpp:557
Value
Value
Definition: UninitializedValues.cpp:102
isDispatchBlock
static bool isDispatchBlock(QualType Ty)
Definition: BodyFarm.cpp:36
clang::VarDecl
Represents a variable declaration or definition.
Definition: Decl.h:813
clang::FunctionDecl::getReturnType
QualType getReturnType() const
Definition: Decl.h:2302
clang::FunctionProtoType::getNumParams
unsigned getNumParams() const
Definition: Type.h:3888
clang::Type::getAs
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6748
clang::ObjCMethodDecl
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:139
clang::ParmVarDecl
Represents a parameter to a function.
Definition: Decl.h:1550
ExprCXX.h
Defines the clang::Expr interface and subclasses for C++ expressions.
clang::NamedDecl::getIdentifier
IdentifierInfo * getIdentifier() const
Get the identifier that names this declaration, if there is one.
Definition: Decl.h:270
clang::RecordDecl
Represents a struct/union/class.
Definition: Decl.h:3593
clang::NamedDecl::getDeclName
DeclarationName getDeclName() const
Get the actual, stored name of the declaration, which may be a special name.
Definition: Decl.h:298
clang::IdentifierInfo
One of these records is kept for each identifier that is lexed.
Definition: IdentifierTable.h:58
clang::BlockPointerType::getPointeeType
QualType getPointeeType() const
Definition: Type.h:2654
clang::ASTContext
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:155
clang::NestedNameSpecifierLoc
A C++ nested-name-specifier augmented with source location information.
Definition: NestedNameSpecifier.h:237
llvm::Optional
Definition: LLVM.h:38
clang::DeclContextLookupResult
The results of name lookup within a DeclContext.
Definition: DeclBase.h:1187
clang::Type::isObjCLifetimeType
bool isObjCLifetimeType() const
Returns true if objects of this type have lifetime semantics under ARC.
Definition: Type.cpp:3941
CodeInjector.h
Defines the clang::CodeInjector interface which is responsible for injecting AST of function definiti...
clang::Type::isReferenceType
bool isReferenceType() const
Definition: Type.h:6308
clang::DeclRefExpr::Create
static DeclRefExpr * Create(const ASTContext &Context, NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc, ValueDecl *D, bool RefersToEnclosingVariableOrCapture, SourceLocation NameLoc, QualType T, ExprValueKind VK, NamedDecl *FoundD=nullptr, const TemplateArgumentListInfo *TemplateArgs=nullptr)
Definition: Expr.cpp:406
clang::VK_RValue
An r-value expression (a pr-value in the C++11 taxonomy) produces a temporary value.
Definition: Specifiers.h:110
clang::BinaryOperatorKind
BinaryOperatorKind
Definition: OperationKinds.h:26
clang::IfStmt::Create
static IfStmt * Create(const ASTContext &Ctx, SourceLocation IL, bool IsConstexpr, Stmt *Init, VarDecl *Var, Expr *Cond, Stmt *Then, SourceLocation EL=SourceLocation(), Stmt *Else=nullptr)
Create an IfStmt.
Definition: Stmt.cpp:841
clang::DeclAccessPair::make
static DeclAccessPair make(NamedDecl *D, AccessSpecifier AS)
Definition: DeclAccessPair.h:36
clang::QualType::isTriviallyCopyableType
bool isTriviallyCopyableType(const ASTContext &Context) const
Return true if this is a trivially copyable type (C++0x [basic.types]p9)
Definition: Type.cpp:2205
clang::ObjCPropertyDecl::getPropertyAttributes
PropertyAttributeKind getPropertyAttributes() const
Definition: DeclObjC.h:840
clang::BinaryOperator
A builtin binary operation expression such as "x + y" or "x <= y".
Definition: Expr.h:3287
clang::CompoundStmt::Create
static CompoundStmt * Create(const ASTContext &C, ArrayRef< Stmt *> Stmts, SourceLocation LB, SourceLocation RB)
Definition: Stmt.cpp:332
clang::Type::isRValueReferenceType
bool isRValueReferenceType() const
Definition: Type.h:6316
clang::ObjCPropertyDecl::isReadOnly
bool isReadOnly() const
isReadOnly - Return true iff the property has a setter.
Definition: DeclObjC.h:863
ExprObjC.h
clang::CXXRecordDecl::isLambda
bool isLambda() const
Determine whether this class describes a lambda function object.
Definition: DeclCXX.h:1196
clang::IntegerLiteral::Create
static IntegerLiteral * Create(const ASTContext &C, const llvm::APInt &V, QualType type, SourceLocation l)
Returns a new integer literal with value &#39;V&#39; and type &#39;type&#39;.
Definition: Expr.cpp:792
clang::OK_Ordinary
An ordinary object is located at an address in memory.
Definition: Specifiers.h:126
clang::ObjCInterfaceDecl
Represents an ObjC class declaration.
Definition: DeclObjC.h:1172
llvm::ArrayRef
Definition: LLVM.h:32
FunctionFarmer
Stmt *(* FunctionFarmer)(ASTContext &C, const FunctionDecl *D)
Definition: BodyFarm.cpp:248
clang::ObjCMethodDecl::getCanonicalDecl
ObjCMethodDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclObjC.cpp:954
clang::DeclContext::lookup
lookup_result lookup(DeclarationName Name) const
lookup - Find the declarations (if any) with the given Name in this context.
Definition: DeclBase.cpp:1595
clang::Type::getAsRecordDecl
RecordDecl * getAsRecordDecl() const
Retrieves the RecordDecl this type refers to.
Definition: Type.cpp:1617
clang::CompoundStmt
CompoundStmt - This represents a group of statements like { stmt stmt }.
Definition: Stmt.h:1241
clang::Type::getAsCXXRecordDecl
CXXRecordDecl * getAsCXXRecordDecl() const
Retrieves the CXXRecordDecl that this type refers to, either because the type is a RecordType or beca...
Definition: Type.cpp:1613
clang::FunctionProtoType
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3687
clang::CastKind
CastKind
CastKind - The kind of operation required for a conversion.
Definition: OperationKinds.h:21
clang::ImplicitCastExpr::Create
static ImplicitCastExpr * Create(const ASTContext &Context, QualType T, CastKind Kind, Expr *Operand, const CXXCastPath *BasePath, ExprValueKind Cat)
Definition: Expr.cpp:1844
findBackingIvar
static const ObjCIvarDecl * findBackingIvar(const ObjCPropertyDecl *Prop)
Definition: BodyFarm.cpp:703
clang::ParamIdx
A single parameter index whose accessors require each use to make explicit the parameter index encodi...
Definition: Attr.h:214
clang::CallExpr::Create
static CallExpr * Create(const ASTContext &Ctx, Expr *Fn, ArrayRef< Expr *> Args, QualType Ty, ExprValueKind VK, SourceLocation RParenLoc, unsigned MinNumArgs=0, ADLCallKind UsesADL=NotADL)
Create a call expression.
Definition: Expr.cpp:1283
clang::ValueDecl
Represent the declaration of a variable (in which case it is an lvalue) a function (in which case it ...
Definition: Decl.h:637
clang::Expr
This represents one expression.
Definition: Expr.h:106
clang::ExprValueKind
ExprValueKind
The categorization of expression values, currently following the C++11 scheme.
Definition: Specifiers.h:107
OperatorKinds.h
Defines an enumeration for C++ overloaded operators.
clang::Decl::getDeclContext
DeclContext * getDeclContext()
Definition: DeclBase.h:427
clang::ObjCPropertyDecl::OBJC_PR_weak
Definition: DeclObjC.h:744
clang::ObjCInterfaceDecl::FindPropertyVisibleInPrimaryClass
ObjCPropertyDecl * FindPropertyVisibleInPrimaryClass(IdentifierInfo *PropertyId, ObjCPropertyQueryKind QueryKind) const
FindPropertyVisibleInPrimaryClass - Finds declaration of the property with name &#39;PropertyId&#39; in the p...
Definition: DeclObjC.cpp:369
clang::Expr::getType
QualType getType() const
Definition: Expr.h:128
clang::DeclContext::isFunctionOrMethod
bool isFunctionOrMethod() const
Definition: DeclBase.h:1800
clang::ObjCImplDecl::property_impls
propimpl_range property_impls() const
Definition: DeclObjC.h:2467
clang::ReturnStmt
ReturnStmt - This represents a return, optionally of an expression: return; return 4;...
Definition: Stmt.h:2443
create_OSAtomicCompareAndSwap
static Stmt * create_OSAtomicCompareAndSwap(ASTContext &C, const FunctionDecl *D)
Definition: BodyFarm.cpp:587
clang::UnaryOperator
UnaryOperator - This represents the unary-expression&#39;s (except sizeof and alignof), the postinc/postdec operators from postfix-expression, and various extensions.
Definition: Expr.h:1896
createObjCPropertyGetter
static Stmt * createObjCPropertyGetter(ASTContext &Ctx, const ObjCPropertyDecl *Prop)
Definition: BodyFarm.cpp:742
clang::QualType::isNull
bool isNull() const
Return true if this QualType doesn&#39;t point to a type yet.
Definition: Type.h:703
clang::ObjCMethodDecl::getSelfDecl
ImplicitParamDecl * getSelfDecl() const
Definition: DeclObjC.h:414
clang::ObjCPropertyDecl::getType
QualType getType() const
Definition: DeclObjC.h:829
clang::BinaryOperator::isComparisonOp
bool isComparisonOp() const
Definition: Expr.h:3378
BodyFarm.h
clang::QualType::getCanonicalType
QualType getCanonicalType() const
Definition: Type.h:6111
clang::SourceLocation
Encodes a location in the source.
Definition: SourceLocation.h:88
clang::FunctionType::getReturnType
QualType getReturnType() const
Definition: Type.h:3613
create_dispatch_sync
static Stmt * create_dispatch_sync(ASTContext &C, const FunctionDecl *D)
Create a fake body for dispatch_sync.
Definition: BodyFarm.cpp:561
create_call_once_lambda_call
static CallExpr * create_call_once_lambda_call(ASTContext &C, ASTMaker M, const ParmVarDecl *Callback, CXXRecordDecl *CallbackDecl, ArrayRef< Expr *> CallArgs)
Definition: BodyFarm.cpp:276
clang::Type::isIntegralType
bool isIntegralType(const ASTContext &Ctx) const
Determine whether this type is an integral type.
Definition: Type.cpp:1759
clang::AS_public
Definition: Specifiers.h:99
clang::DeclContext::isStdNamespace
bool isStdNamespace() const
Definition: DeclBase.cpp:1062
clang::FunctionDecl::getParamDecl
const ParmVarDecl * getParamDecl(unsigned i) const
Definition: Decl.h:2285
clang::ASTContext::VoidTy
CanQualType VoidTy
Definition: ASTContext.h:1016
llvm::SmallVector
Definition: LLVM.h:36
clang::ObjCPropertyDecl
Represents one property declaration in an Objective-C interface.
Definition: DeclObjC.h:729
clang::ImplicitCastExpr
ImplicitCastExpr - Allows us to explicitly represent implicit type conversions, which have no direct ...
Definition: Expr.h:3115
clang::Expr::isLValue
bool isLValue() const
isLValue - True if this expression is an "l-value" according to the rules of the current language...
Definition: Expr.h:249
clang::ObjCInterfaceDecl::getImplementation
ObjCImplementationDecl * getImplementation() const
Definition: DeclObjC.cpp:1549
clang::ASTContext::hasSameUnqualifiedType
bool hasSameUnqualifiedType(QualType T1, QualType T2) const
Determine whether the given types are equivalent after cvr-qualifiers have been removed.
Definition: ASTContext.h:2293
clang::MultiVersionKind::None
clang::MemberExpr::Create
static MemberExpr * Create(const ASTContext &C, Expr *base, bool isarrow, SourceLocation OperatorLoc, NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc, ValueDecl *memberdecl, DeclAccessPair founddecl, DeclarationNameInfo MemberNameInfo, const TemplateArgumentListInfo *targs, QualType ty, ExprValueKind VK, ExprObjectKind OK)
Definition: Expr.cpp:1539
clang::DeclAccessPair
A POD class for pairing a NamedDecl* with an access specifier.
Definition: DeclAccessPair.h:30
NestedNameSpecifier.h
create_dispatch_once
static Stmt * create_dispatch_once(ASTContext &C, const FunctionDecl *D)
Create a fake body for dispatch_once.
Definition: BodyFarm.cpp:478
Decl.h
clang
Dataflow Directional Tag Classes.
Definition: CFGReachabilityAnalysis.h:22
clang::CXXRecordDecl::getLambdaCallOperator
CXXMethodDecl * getLambdaCallOperator() const
Retrieve the lambda call operator of the closure type if this is a closure type.
Definition: DeclCXX.cpp:1362
clang::ReturnStmt::Create
static ReturnStmt * Create(const ASTContext &Ctx, SourceLocation RL, Expr *E, const VarDecl *NRVOCandidate)
Create a return statement.
Definition: Stmt.cpp:1064
clang::DeclarationName
The name of a declaration.
Definition: DeclarationName.h:146
clang::Type::isBooleanType
bool isBooleanType() const
Definition: Type.h:6657
clang::BodyFarm::getBody
Stmt * getBody(const FunctionDecl *D)
Factory method for creating bodies for ordinary functions.
Definition: BodyFarm.cpp:668
clang::ObjCIvarDecl::getContainingInterface
const ObjCInterfaceDecl * getContainingInterface() const
Return the class interface that this ivar is logically contained in; this is either the interface whe...
Definition: DeclObjC.cpp:1790
clang::DeclarationNameInfo
DeclarationNameInfo - A collector data type for bundling together a DeclarationName and the correspnd...
Definition: DeclarationName.h:691
clang::BlockPointerType
Pointer to a block type.
Definition: Type.h:2639
clang::ObjCImplementationDecl
ObjCImplementationDecl - Represents a class definition - this is where method definitions are specifi...
Definition: DeclObjC.h:2552
clang::Type::isIntegerType
bool isIntegerType() const
isIntegerType() does not include complex integers (a GCC extension).
Definition: Type.h:6578
clang::Type::isFunctionType
bool isFunctionType() const
Definition: Type.h:6292
clang::APValue
APValue - This class implements a discriminated union of [uninitialized] [APSInt] [APFloat]...
Definition: APValue.h:38
clang::ObjCIvarRefExpr
ObjCIvarRefExpr - A reference to an ObjC instance variable.
Definition: ExprObjC.h:513
clang::Type::isLValueReferenceType
bool isLValueReferenceType() const
Definition: Type.h:6312
clang::ObjCMethodDecl::findPropertyDecl
const ObjCPropertyDecl * findPropertyDecl(bool CheckOverrides=true) const
Returns the property associated with this method&#39;s selector.
Definition: DeclObjC.cpp:1302
clang::FunctionProtoType::getParamType
QualType getParamType(unsigned i) const
Definition: Type.h:3890
clang::MemberExpr
MemberExpr - [C99 6.5.2.3] Structure and Union Members.
Definition: Expr.h:2682
clang::CXXRecordDecl
Represents a C++ struct/union/class.
Definition: DeclCXX.h:300
clang::Type::isVoidType
bool isVoidType() const
Definition: Type.h:6544
clang::ObjCIvarDecl
ObjCIvarDecl - Represents an ObjC instance variable.
Definition: DeclObjC.h:1945
clang::ObjCPropertyDecl::getPropertyIvarDecl
ObjCIvarDecl * getPropertyIvarDecl() const
Definition: DeclObjC.h:945
clang::AttrSyntax::C
Expr.h
clang::ASTContext::getPointerType
QualType getPointerType(QualType T) const
Return the uniqued reference to the type for a pointer to the specified type.
Definition: ASTContext.cpp:2847
clang::CallExpr
CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]).
Definition: Expr.h:2396
clang::NamedDecl::getName
StringRef getName() const
Get the name of identifier for this declaration as a StringRef.
Definition: Decl.h:276
clang::ASTContext::IntTy
CanQualType IntTy
Definition: ASTContext.h:1025
clang::ObjCBoolLiteralExpr
ObjCBoolLiteralExpr - Objective-C Boolean Literal.
Definition: ExprObjC.h:82
clang::DeclRefExpr
A reference to a declared variable, function, enum, etc.
Definition: Expr.h:1041
clang::Type::isPointerType
bool isPointerType() const
Definition: Type.h:6296
clang::CXXBasePaths
BasePaths - Represents the set of paths from a derived class to one of its (direct or indirect) bases...
Definition: CXXInheritance.h:119
clang::ValueDecl::getType
QualType getType() const
Definition: Decl.h:648
clang::VK_LValue
An l-value expression is a reference to an object with independent storage.
Definition: Specifiers.h:114
clang::FunctionDecl::getCanonicalDecl
FunctionDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: Decl.cpp:2983
clang::ObjCPropertyDecl::getGetterMethodDecl
ObjCMethodDecl * getGetterMethodDecl() const
Definition: DeclObjC.h:922
clang::NamedDecl
This represents a decl that may have a name.
Definition: Decl.h:249
clang::ObjCMethodDecl::isPropertyAccessor
bool isPropertyAccessor() const
Definition: DeclObjC.h:432
clang::FunctionDecl::getNumParams
unsigned getNumParams() const
Return the number of parameters this function must have based on its FunctionType.
Definition: Decl.cpp:3055
Comparison
Comparison
Definition: SemaOverload.cpp:8998