clang 8.0.0

RewriteObjC.cpp
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1 //===--- RewriteObjC.cpp - Playground for the code rewriter ---------------===//
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 // Hacks and fun related to the code rewriter.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "clang/Rewrite/Frontend/ASTConsumers.h"
15 #include "clang/AST/AST.h"
16 #include "clang/AST/ASTConsumer.h"
17 #include "clang/AST/Attr.h"
18 #include "clang/AST/ParentMap.h"
19 #include "clang/Basic/CharInfo.h"
20 #include "clang/Basic/Diagnostic.h"
21 #include "clang/Basic/IdentifierTable.h"
22 #include "clang/Basic/SourceManager.h"
23 #include "clang/Config/config.h"
24 #include "clang/Lex/Lexer.h"
25 #include "clang/Rewrite/Core/Rewriter.h"
26 #include "llvm/ADT/DenseSet.h"
27 #include "llvm/ADT/SmallPtrSet.h"
28 #include "llvm/ADT/StringExtras.h"
29 #include "llvm/Support/MemoryBuffer.h"
30 #include "llvm/Support/raw_ostream.h"
31 #include <memory>
32
33 #if CLANG_ENABLE_OBJC_REWRITER
34
35 using namespace clang;
36 using llvm::utostr;
37
38 namespace {
39 class RewriteObjC : public ASTConsumer {
40 protected:
41 enum {
42 BLOCK_FIELD_IS_OBJECT = 3, /* id, NSObject, __attribute__((NSObject)),
43 block, ... */
44 BLOCK_FIELD_IS_BLOCK = 7, /* a block variable */
45 BLOCK_FIELD_IS_BYREF = 8, /* the on stack structure holding the
46 __block variable */
47 BLOCK_FIELD_IS_WEAK = 16, /* declared __weak, only used in byref copy
48 helpers */
49 BLOCK_BYREF_CALLER = 128, /* called from __block (byref) copy/dispose
50 support routines */
51 BLOCK_BYREF_CURRENT_MAX = 256
52 };
53
54 enum {
55 BLOCK_NEEDS_FREE = (1 << 24),
56 BLOCK_HAS_COPY_DISPOSE = (1 << 25),
57 BLOCK_HAS_CXX_OBJ = (1 << 26),
58 BLOCK_IS_GC = (1 << 27),
59 BLOCK_IS_GLOBAL = (1 << 28),
60 BLOCK_HAS_DESCRIPTOR = (1 << 29)
61 };
62 static const int OBJC_ABI_VERSION = 7;
63
64 Rewriter Rewrite;
65 DiagnosticsEngine &Diags;
66 const LangOptions &LangOpts;
67 ASTContext *Context;
68 SourceManager *SM;
69 TranslationUnitDecl *TUDecl;
70 FileID MainFileID;
71 const char *MainFileStart, *MainFileEnd;
72 Stmt *CurrentBody;
73 ParentMap *PropParentMap; // created lazily.
74 std::string InFileName;
75 std::unique_ptr<raw_ostream> OutFile;
76 std::string Preamble;
77
78 TypeDecl *ProtocolTypeDecl;
79 VarDecl *GlobalVarDecl;
80 unsigned RewriteFailedDiag;
81 // ObjC string constant support.
82 unsigned NumObjCStringLiterals;
83 VarDecl *ConstantStringClassReference;
84 RecordDecl *NSStringRecord;
85
86 // ObjC foreach break/continue generation support.
87 int BcLabelCount;
88
89 unsigned TryFinallyContainsReturnDiag;
90 // Needed for super.
91 ObjCMethodDecl *CurMethodDef;
92 RecordDecl *SuperStructDecl;
93 RecordDecl *ConstantStringDecl;
94
95 FunctionDecl *MsgSendFunctionDecl;
96 FunctionDecl *MsgSendSuperFunctionDecl;
97 FunctionDecl *MsgSendStretFunctionDecl;
98 FunctionDecl *MsgSendSuperStretFunctionDecl;
99 FunctionDecl *MsgSendFpretFunctionDecl;
100 FunctionDecl *GetClassFunctionDecl;
101 FunctionDecl *GetMetaClassFunctionDecl;
102 FunctionDecl *GetSuperClassFunctionDecl;
103 FunctionDecl *SelGetUidFunctionDecl;
104 FunctionDecl *CFStringFunctionDecl;
105 FunctionDecl *SuperConstructorFunctionDecl;
106 FunctionDecl *CurFunctionDef;
107 FunctionDecl *CurFunctionDeclToDeclareForBlock;
108
109 /* Misc. containers needed for meta-data rewrite. */
110 SmallVector<ObjCImplementationDecl *, 8> ClassImplementation;
111 SmallVector<ObjCCategoryImplDecl *, 8> CategoryImplementation;
112 llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCSynthesizedStructs;
113 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> ObjCSynthesizedProtocols;
114 llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCForwardDecls;
115 llvm::DenseMap<ObjCMethodDecl*, std::string> MethodInternalNames;
116 SmallVector<Stmt *, 32> Stmts;
117 SmallVector<int, 8> ObjCBcLabelNo;
118 // Remember all the @protocol(<expr>) expressions.
119 llvm::SmallPtrSet<ObjCProtocolDecl *, 32> ProtocolExprDecls;
120
121 llvm::DenseSet<uint64_t> CopyDestroyCache;
122
123 // Block expressions.
124 SmallVector<BlockExpr *, 32> Blocks;
125 SmallVector<int, 32> InnerDeclRefsCount;
126 SmallVector<DeclRefExpr *, 32> InnerDeclRefs;
127
128 SmallVector<DeclRefExpr *, 32> BlockDeclRefs;
129
130 // Block related declarations.
131 SmallVector<ValueDecl *, 8> BlockByCopyDecls;
132 llvm::SmallPtrSet<ValueDecl *, 8> BlockByCopyDeclsPtrSet;
133 SmallVector<ValueDecl *, 8> BlockByRefDecls;
134 llvm::SmallPtrSet<ValueDecl *, 8> BlockByRefDeclsPtrSet;
135 llvm::DenseMap<ValueDecl *, unsigned> BlockByRefDeclNo;
136 llvm::SmallPtrSet<ValueDecl *, 8> ImportedBlockDecls;
137 llvm::SmallPtrSet<VarDecl *, 8> ImportedLocalExternalDecls;
138
139 llvm::DenseMap<BlockExpr *, std::string> RewrittenBlockExprs;
140
141 // This maps an original source AST to it's rewritten form. This allows
142 // us to avoid rewriting the same node twice (which is very uncommon).
143 // This is needed to support some of the exotic property rewriting.
144 llvm::DenseMap<Stmt *, Stmt *> ReplacedNodes;
145
146 // Needed for header files being rewritten
147 bool IsHeader;
148 bool SilenceRewriteMacroWarning;
149 bool objc_impl_method;
150
151 bool DisableReplaceStmt;
152 class DisableReplaceStmtScope {
153 RewriteObjC &R;
154 bool SavedValue;
155
156 public:
157 DisableReplaceStmtScope(RewriteObjC &R)
158 : R(R), SavedValue(R.DisableReplaceStmt) {
159 R.DisableReplaceStmt = true;
160 }
161
162 ~DisableReplaceStmtScope() {
163 R.DisableReplaceStmt = SavedValue;
164 }
165 };
166
167 void InitializeCommon(ASTContext &context);
168
169 public:
170 // Top Level Driver code.
171 bool HandleTopLevelDecl(DeclGroupRef D) override {
172 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
173 if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(*I)) {
174 if (!Class->isThisDeclarationADefinition()) {
175 RewriteForwardClassDecl(D);
176 break;
177 }
178 }
179
180 if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>(*I)) {
181 if (!Proto->isThisDeclarationADefinition()) {
182 RewriteForwardProtocolDecl(D);
183 break;
184 }
185 }
186
187 HandleTopLevelSingleDecl(*I);
188 }
189 return true;
190 }
191
192 void HandleTopLevelSingleDecl(Decl *D);
193 void HandleDeclInMainFile(Decl *D);
194 RewriteObjC(std::string inFile, std::unique_ptr<raw_ostream> OS,
195 DiagnosticsEngine &D, const LangOptions &LOpts,
196 bool silenceMacroWarn);
197
198 ~RewriteObjC() override {}
199
200 void HandleTranslationUnit(ASTContext &C) override;
201
202 void ReplaceStmt(Stmt *Old, Stmt *New) {
203 ReplaceStmtWithRange(Old, New, Old->getSourceRange());
204 }
205
206 void ReplaceStmtWithRange(Stmt *Old, Stmt *New, SourceRange SrcRange) {
207 assert(Old != nullptr && New != nullptr && "Expected non-null Stmt's");
208
209 Stmt *ReplacingStmt = ReplacedNodes[Old];
210 if (ReplacingStmt)
211 return; // We can't rewrite the same node twice.
212
213 if (DisableReplaceStmt)
214 return;
215
216 // Measure the old text.
217 int Size = Rewrite.getRangeSize(SrcRange);
218 if (Size == -1) {
219 Diags.Report(Context->getFullLoc(Old->getBeginLoc()), RewriteFailedDiag)
220 << Old->getSourceRange();
221 return;
222 }
223 // Get the new text.
224 std::string SStr;
225 llvm::raw_string_ostream S(SStr);
226 New->printPretty(S, nullptr, PrintingPolicy(LangOpts));
227 const std::string &Str = S.str();
228
229 // If replacement succeeded or warning disabled return with no warning.
230 if (!Rewrite.ReplaceText(SrcRange.getBegin(), Size, Str)) {
231 ReplacedNodes[Old] = New;
232 return;
233 }
234 if (SilenceRewriteMacroWarning)
235 return;
236 Diags.Report(Context->getFullLoc(Old->getBeginLoc()), RewriteFailedDiag)
237 << Old->getSourceRange();
238 }
239
240 void InsertText(SourceLocation Loc, StringRef Str,
241 bool InsertAfter = true) {
242 // If insertion succeeded or warning disabled return with no warning.
243 if (!Rewrite.InsertText(Loc, Str, InsertAfter) ||
244 SilenceRewriteMacroWarning)
245 return;
246
247 Diags.Report(Context->getFullLoc(Loc), RewriteFailedDiag);
248 }
249
250 void ReplaceText(SourceLocation Start, unsigned OrigLength,
251 StringRef Str) {
252 // If removal succeeded or warning disabled return with no warning.
253 if (!Rewrite.ReplaceText(Start, OrigLength, Str) ||
254 SilenceRewriteMacroWarning)
255 return;
256
257 Diags.Report(Context->getFullLoc(Start), RewriteFailedDiag);
258 }
259
260 // Syntactic Rewriting.
261 void RewriteRecordBody(RecordDecl *RD);
262 void RewriteInclude();
263 void RewriteForwardClassDecl(DeclGroupRef D);
264 void RewriteForwardClassDecl(const SmallVectorImpl<Decl *> &DG);
265 void RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
266 const std::string &typedefString);
267 void RewriteImplementations();
268 void RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
269 ObjCImplementationDecl *IMD,
270 ObjCCategoryImplDecl *CID);
271 void RewriteInterfaceDecl(ObjCInterfaceDecl *Dcl);
272 void RewriteImplementationDecl(Decl *Dcl);
273 void RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
274 ObjCMethodDecl *MDecl, std::string &ResultStr);
275 void RewriteTypeIntoString(QualType T, std::string &ResultStr,
276 const FunctionType *&FPRetType);
277 void RewriteByRefString(std::string &ResultStr, const std::string &Name,
278 ValueDecl *VD, bool def=false);
279 void RewriteCategoryDecl(ObjCCategoryDecl *Dcl);
280 void RewriteProtocolDecl(ObjCProtocolDecl *Dcl);
281 void RewriteForwardProtocolDecl(DeclGroupRef D);
282 void RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG);
283 void RewriteMethodDeclaration(ObjCMethodDecl *Method);
284 void RewriteProperty(ObjCPropertyDecl *prop);
285 void RewriteFunctionDecl(FunctionDecl *FD);
286 void RewriteBlockPointerType(std::string& Str, QualType Type);
287 void RewriteBlockPointerTypeVariable(std::string& Str, ValueDecl *VD);
288 void RewriteBlockLiteralFunctionDecl(FunctionDecl *FD);
289 void RewriteObjCQualifiedInterfaceTypes(Decl *Dcl);
290 void RewriteTypeOfDecl(VarDecl *VD);
291 void RewriteObjCQualifiedInterfaceTypes(Expr *E);
292
293 // Expression Rewriting.
294 Stmt *RewriteFunctionBodyOrGlobalInitializer(Stmt *S);
295 Stmt *RewriteAtEncode(ObjCEncodeExpr *Exp);
296 Stmt *RewritePropertyOrImplicitGetter(PseudoObjectExpr *Pseudo);
297 Stmt *RewritePropertyOrImplicitSetter(PseudoObjectExpr *Pseudo);
298 Stmt *RewriteAtSelector(ObjCSelectorExpr *Exp);
299 Stmt *RewriteMessageExpr(ObjCMessageExpr *Exp);
300 Stmt *RewriteObjCStringLiteral(ObjCStringLiteral *Exp);
301 Stmt *RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp);
302 void RewriteTryReturnStmts(Stmt *S);
303 void RewriteSyncReturnStmts(Stmt *S, std::string buf);
304 Stmt *RewriteObjCTryStmt(ObjCAtTryStmt *S);
305 Stmt *RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S);
306 Stmt *RewriteObjCThrowStmt(ObjCAtThrowStmt *S);
307 Stmt *RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
308 SourceLocation OrigEnd);
309 Stmt *RewriteBreakStmt(BreakStmt *S);
310 Stmt *RewriteContinueStmt(ContinueStmt *S);
311 void RewriteCastExpr(CStyleCastExpr *CE);
312
313 // Block rewriting.
314 void RewriteBlocksInFunctionProtoType(QualType funcType, NamedDecl *D);
315
316 // Block specific rewrite rules.
317 void RewriteBlockPointerDecl(NamedDecl *VD);
318 void RewriteByRefVar(VarDecl *VD);
319 Stmt *RewriteBlockDeclRefExpr(DeclRefExpr *VD);
320 Stmt *RewriteLocalVariableExternalStorage(DeclRefExpr *DRE);
321 void RewriteBlockPointerFunctionArgs(FunctionDecl *FD);
322
323 void RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
324 std::string &Result);
325
326 void Initialize(ASTContext &context) override = 0;
327
328 // Metadata Rewriting.
329 virtual void RewriteMetaDataIntoBuffer(std::string &Result) = 0;
330 virtual void RewriteObjCProtocolListMetaData(const ObjCList<ObjCProtocolDecl> &Prots,
331 StringRef prefix,
332 StringRef ClassName,
333 std::string &Result) = 0;
334 virtual void RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *CDecl,
335 std::string &Result) = 0;
336 virtual void RewriteObjCProtocolMetaData(ObjCProtocolDecl *Protocol,
337 StringRef prefix,
338 StringRef ClassName,
339 std::string &Result) = 0;
340 virtual void RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
341 std::string &Result) = 0;
342
343 // Rewriting ivar access
344 virtual Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV) = 0;
345 virtual void RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
346 std::string &Result) = 0;
347
348 // Misc. AST transformation routines. Sometimes they end up calling
349 // rewriting routines on the new ASTs.
350 CallExpr *SynthesizeCallToFunctionDecl(FunctionDecl *FD,
351 ArrayRef<Expr *> Args,
352 SourceLocation StartLoc=SourceLocation(),
353 SourceLocation EndLoc=SourceLocation());
354 CallExpr *SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
355 QualType msgSendType,
356 QualType returnType,
357 SmallVectorImpl<QualType> &ArgTypes,
358 SmallVectorImpl<Expr*> &MsgExprs,
359 ObjCMethodDecl *Method);
360 Stmt *SynthMessageExpr(ObjCMessageExpr *Exp,
361 SourceLocation StartLoc=SourceLocation(),
362 SourceLocation EndLoc=SourceLocation());
363
364 void SynthCountByEnumWithState(std::string &buf);
365 void SynthMsgSendFunctionDecl();
366 void SynthMsgSendSuperFunctionDecl();
367 void SynthMsgSendStretFunctionDecl();
368 void SynthMsgSendFpretFunctionDecl();
369 void SynthMsgSendSuperStretFunctionDecl();
370 void SynthGetClassFunctionDecl();
371 void SynthGetMetaClassFunctionDecl();
372 void SynthGetSuperClassFunctionDecl();
373 void SynthSelGetUidFunctionDecl();
374 void SynthSuperConstructorFunctionDecl();
375
376 std::string SynthesizeByrefCopyDestroyHelper(VarDecl *VD, int flag);
377 std::string SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
378 StringRef funcName, std::string Tag);
379 std::string SynthesizeBlockFunc(BlockExpr *CE, int i,
380 StringRef funcName, std::string Tag);
381 std::string SynthesizeBlockImpl(BlockExpr *CE,
382 std::string Tag, std::string Desc);
383 std::string SynthesizeBlockDescriptor(std::string DescTag,
384 std::string ImplTag,
385 int i, StringRef funcName,
386 unsigned hasCopy);
387 Stmt *SynthesizeBlockCall(CallExpr *Exp, const Expr* BlockExp);
388 void SynthesizeBlockLiterals(SourceLocation FunLocStart,
389 StringRef FunName);
390 FunctionDecl *SynthBlockInitFunctionDecl(StringRef name);
391 Stmt *SynthBlockInitExpr(BlockExpr *Exp,
392 const SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs);
393
394 // Misc. helper routines.
395 QualType getProtocolType();
396 void WarnAboutReturnGotoStmts(Stmt *S);
397 void HasReturnStmts(Stmt *S, bool &hasReturns);
398 void CheckFunctionPointerDecl(QualType dType, NamedDecl *ND);
399 void InsertBlockLiteralsWithinFunction(FunctionDecl *FD);
400 void InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD);
401
402 bool IsDeclStmtInForeachHeader(DeclStmt *DS);
403 void CollectBlockDeclRefInfo(BlockExpr *Exp);
404 void GetBlockDeclRefExprs(Stmt *S);
405 void GetInnerBlockDeclRefExprs(Stmt *S,
406 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
407 llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts);
408
409 // We avoid calling Type::isBlockPointerType(), since it operates on the
410 // canonical type. We only care if the top-level type is a closure pointer.
411 bool isTopLevelBlockPointerType(QualType T) {
412 return isa<BlockPointerType>(T);
413 }
414
415 /// convertBlockPointerToFunctionPointer - Converts a block-pointer type
416 /// to a function pointer type and upon success, returns true; false
417 /// otherwise.
418 bool convertBlockPointerToFunctionPointer(QualType &T) {
419 if (isTopLevelBlockPointerType(T)) {
420 const BlockPointerType *BPT = T->getAs<BlockPointerType>();
421 T = Context->getPointerType(BPT->getPointeeType());
422 return true;
423 }
424 return false;
425 }
426
427 bool needToScanForQualifiers(QualType T);
428 QualType getSuperStructType();
429 QualType getConstantStringStructType();
430 QualType convertFunctionTypeOfBlocks(const FunctionType *FT);
431 bool BufferContainsPPDirectives(const char *startBuf, const char *endBuf);
432
433 void convertToUnqualifiedObjCType(QualType &T) {
434 if (T->isObjCQualifiedIdType())
435 T = Context->getObjCIdType();
436 else if (T->isObjCQualifiedClassType())
437 T = Context->getObjCClassType();
438 else if (T->isObjCObjectPointerType() &&
439 T->getPointeeType()->isObjCQualifiedInterfaceType()) {
440 if (const ObjCObjectPointerType * OBJPT =
441 T->getAsObjCInterfacePointerType()) {
442 const ObjCInterfaceType *IFaceT = OBJPT->getInterfaceType();
443 T = QualType(IFaceT, 0);
444 T = Context->getPointerType(T);
445 }
446 }
447 }
448
449 // FIXME: This predicate seems like it would be useful to add to ASTContext.
450 bool isObjCType(QualType T) {
451 if (!LangOpts.ObjC)
452 return false;
453
454 QualType OCT = Context->getCanonicalType(T).getUnqualifiedType();
455
456 if (OCT == Context->getCanonicalType(Context->getObjCIdType()) ||
457 OCT == Context->getCanonicalType(Context->getObjCClassType()))
458 return true;
459
460 if (const PointerType *PT = OCT->getAs<PointerType>()) {
461 if (isa<ObjCInterfaceType>(PT->getPointeeType()) ||
462 PT->getPointeeType()->isObjCQualifiedIdType())
463 return true;
464 }
465 return false;
466 }
467 bool PointerTypeTakesAnyBlockArguments(QualType QT);
468 bool PointerTypeTakesAnyObjCQualifiedType(QualType QT);
469 void GetExtentOfArgList(const char *Name, const char *&LParen,
470 const char *&RParen);
471
472 void QuoteDoublequotes(std::string &From, std::string &To) {
473 for (unsigned i = 0; i < From.length(); i++) {
474 if (From[i] == '"')
475 To += "\\\"";
476 else
477 To += From[i];
478 }
479 }
480
481 QualType getSimpleFunctionType(QualType result,
482 ArrayRef<QualType> args,
483 bool variadic = false) {
484 if (result == Context->getObjCInstanceType())
485 result = Context->getObjCIdType();
486 FunctionProtoType::ExtProtoInfo fpi;
487 fpi.Variadic = variadic;
488 return Context->getFunctionType(result, args, fpi);
489 }
490
491 // Helper function: create a CStyleCastExpr with trivial type source info.
492 CStyleCastExpr* NoTypeInfoCStyleCastExpr(ASTContext *Ctx, QualType Ty,
493 CastKind Kind, Expr *E) {
494 TypeSourceInfo *TInfo = Ctx->getTrivialTypeSourceInfo(Ty, SourceLocation());
495 return CStyleCastExpr::Create(*Ctx, Ty, VK_RValue, Kind, E, nullptr,
496 TInfo, SourceLocation(), SourceLocation());
497 }
498
499 StringLiteral *getStringLiteral(StringRef Str) {
500 QualType StrType = Context->getConstantArrayType(
501 Context->CharTy, llvm::APInt(32, Str.size() + 1), ArrayType::Normal,
502 0);
503 return StringLiteral::Create(*Context, Str, StringLiteral::Ascii,
504 /*Pascal=*/false, StrType, SourceLocation());
505 }
506 };
507
508 class RewriteObjCFragileABI : public RewriteObjC {
509 public:
510 RewriteObjCFragileABI(std::string inFile, std::unique_ptr<raw_ostream> OS,
511 DiagnosticsEngine &D, const LangOptions &LOpts,
512 bool silenceMacroWarn)
513 : RewriteObjC(inFile, std::move(OS), D, LOpts, silenceMacroWarn) {}
514
515 ~RewriteObjCFragileABI() override {}
516 void Initialize(ASTContext &context) override;
517
518 // Rewriting metadata
519 template<typename MethodIterator>
520 void RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
521 MethodIterator MethodEnd,
522 bool IsInstanceMethod,
523 StringRef prefix,
524 StringRef ClassName,
525 std::string &Result);
526 void RewriteObjCProtocolMetaData(ObjCProtocolDecl *Protocol,
527 StringRef prefix, StringRef ClassName,
528 std::string &Result) override;
529 void RewriteObjCProtocolListMetaData(
530 const ObjCList<ObjCProtocolDecl> &Prots,
531 StringRef prefix, StringRef ClassName, std::string &Result) override;
532 void RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
533 std::string &Result) override;
534 void RewriteMetaDataIntoBuffer(std::string &Result) override;
535 void RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *CDecl,
536 std::string &Result) override;
537
538 // Rewriting ivar
539 void RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
540 std::string &Result) override;
541 Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV) override;
542 };
543 } // end anonymous namespace
544
545 void RewriteObjC::RewriteBlocksInFunctionProtoType(QualType funcType,
546 NamedDecl *D) {
547 if (const FunctionProtoType *fproto
548 = dyn_cast<FunctionProtoType>(funcType.IgnoreParens())) {
549 for (const auto &I : fproto->param_types())
550 if (isTopLevelBlockPointerType(I)) {
551 // All the args are checked/rewritten. Don't call twice!
552 RewriteBlockPointerDecl(D);
553 break;
554 }
555 }
556 }
557
558 void RewriteObjC::CheckFunctionPointerDecl(QualType funcType, NamedDecl *ND) {
559 const PointerType *PT = funcType->getAs<PointerType>();
560 if (PT && PointerTypeTakesAnyBlockArguments(funcType))
561 RewriteBlocksInFunctionProtoType(PT->getPointeeType(), ND);
562 }
563
564 static bool IsHeaderFile(const std::string &Filename) {
565 std::string::size_type DotPos = Filename.rfind('.');
566
567 if (DotPos == std::string::npos) {
568 // no file extension
569 return false;
570 }
571
572 std::string Ext = std::string(Filename.begin()+DotPos+1, Filename.end());
573 // C header: .h
574 // C++ header: .hh or .H;
575 return Ext == "h" || Ext == "hh" || Ext == "H";
576 }
577
578 RewriteObjC::RewriteObjC(std::string inFile, std::unique_ptr<raw_ostream> OS,
579 DiagnosticsEngine &D, const LangOptions &LOpts,
580 bool silenceMacroWarn)
581 : Diags(D), LangOpts(LOpts), InFileName(inFile), OutFile(std::move(OS)),
582 SilenceRewriteMacroWarning(silenceMacroWarn) {
583 IsHeader = IsHeaderFile(inFile);
584 RewriteFailedDiag = Diags.getCustomDiagID(DiagnosticsEngine::Warning,
585 "rewriting sub-expression within a macro (may not be correct)");
586 TryFinallyContainsReturnDiag = Diags.getCustomDiagID(
587 DiagnosticsEngine::Warning,
588 "rewriter doesn't support user-specified control flow semantics "
589 "for @try/@finally (code may not execute properly)");
590 }
591
592 std::unique_ptr<ASTConsumer>
593 clang::CreateObjCRewriter(const std::string &InFile,
594 std::unique_ptr<raw_ostream> OS,
595 DiagnosticsEngine &Diags, const LangOptions &LOpts,
596 bool SilenceRewriteMacroWarning) {
597 return llvm::make_unique<RewriteObjCFragileABI>(
598 InFile, std::move(OS), Diags, LOpts, SilenceRewriteMacroWarning);
599 }
600
601 void RewriteObjC::InitializeCommon(ASTContext &context) {
602 Context = &context;
603 SM = &Context->getSourceManager();
604 TUDecl = Context->getTranslationUnitDecl();
605 MsgSendFunctionDecl = nullptr;
606 MsgSendSuperFunctionDecl = nullptr;
607 MsgSendStretFunctionDecl = nullptr;
608 MsgSendSuperStretFunctionDecl = nullptr;
609 MsgSendFpretFunctionDecl = nullptr;
610 GetClassFunctionDecl = nullptr;
611 GetMetaClassFunctionDecl = nullptr;
612 GetSuperClassFunctionDecl = nullptr;
613 SelGetUidFunctionDecl = nullptr;
614 CFStringFunctionDecl = nullptr;
615 ConstantStringClassReference = nullptr;
616 NSStringRecord = nullptr;
617 CurMethodDef = nullptr;
618 CurFunctionDef = nullptr;
619 CurFunctionDeclToDeclareForBlock = nullptr;
620 GlobalVarDecl = nullptr;
621 SuperStructDecl = nullptr;
622 ProtocolTypeDecl = nullptr;
623 ConstantStringDecl = nullptr;
624 BcLabelCount = 0;
625 SuperConstructorFunctionDecl = nullptr;
626 NumObjCStringLiterals = 0;
627 PropParentMap = nullptr;
628 CurrentBody = nullptr;
629 DisableReplaceStmt = false;
630 objc_impl_method = false;
631
632 // Get the ID and start/end of the main file.
633 MainFileID = SM->getMainFileID();
634 const llvm::MemoryBuffer *MainBuf = SM->getBuffer(MainFileID);
635 MainFileStart = MainBuf->getBufferStart();
636 MainFileEnd = MainBuf->getBufferEnd();
637
638 Rewrite.setSourceMgr(Context->getSourceManager(), Context->getLangOpts());
639 }
640
641 //===----------------------------------------------------------------------===//
642 // Top Level Driver Code
643 //===----------------------------------------------------------------------===//
644
645 void RewriteObjC::HandleTopLevelSingleDecl(Decl *D) {
646 if (Diags.hasErrorOccurred())
647 return;
648
649 // Two cases: either the decl could be in the main file, or it could be in a
650 // #included file. If the former, rewrite it now. If the later, check to see
651 // if we rewrote the #include/#import.
652 SourceLocation Loc = D->getLocation();
653 Loc = SM->getExpansionLoc(Loc);
654
655 // If this is for a builtin, ignore it.
656 if (Loc.isInvalid()) return;
657
658 // Look for built-in declarations that we need to refer during the rewrite.
659 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
660 RewriteFunctionDecl(FD);
661 } else if (VarDecl *FVD = dyn_cast<VarDecl>(D)) {
662 // declared in <Foundation/NSString.h>
663 if (FVD->getName() == "_NSConstantStringClassReference") {
664 ConstantStringClassReference = FVD;
665 return;
666 }
667 } else if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
668 if (ID->isThisDeclarationADefinition())
669 RewriteInterfaceDecl(ID);
670 } else if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(D)) {
671 RewriteCategoryDecl(CD);
672 } else if (ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D)) {
673 if (PD->isThisDeclarationADefinition())
674 RewriteProtocolDecl(PD);
675 } else if (LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(D)) {
676 // Recurse into linkage specifications
677 for (DeclContext::decl_iterator DI = LSD->decls_begin(),
678 DIEnd = LSD->decls_end();
679 DI != DIEnd; ) {
680 if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>((*DI))) {
681 if (!IFace->isThisDeclarationADefinition()) {
682 SmallVector<Decl *, 8> DG;
683 SourceLocation StartLoc = IFace->getBeginLoc();
684 do {
685 if (isa<ObjCInterfaceDecl>(*DI) &&
686 !cast<ObjCInterfaceDecl>(*DI)->isThisDeclarationADefinition() &&
687 StartLoc == (*DI)->getBeginLoc())
688 DG.push_back(*DI);
689 else
690 break;
691
692 ++DI;
693 } while (DI != DIEnd);
694 RewriteForwardClassDecl(DG);
695 continue;
696 }
697 }
698
699 if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>((*DI))) {
700 if (!Proto->isThisDeclarationADefinition()) {
701 SmallVector<Decl *, 8> DG;
702 SourceLocation StartLoc = Proto->getBeginLoc();
703 do {
704 if (isa<ObjCProtocolDecl>(*DI) &&
705 !cast<ObjCProtocolDecl>(*DI)->isThisDeclarationADefinition() &&
706 StartLoc == (*DI)->getBeginLoc())
707 DG.push_back(*DI);
708 else
709 break;
710
711 ++DI;
712 } while (DI != DIEnd);
713 RewriteForwardProtocolDecl(DG);
714 continue;
715 }
716 }
717
718 HandleTopLevelSingleDecl(*DI);
719 ++DI;
720 }
721 }
722 // If we have a decl in the main file, see if we should rewrite it.
723 if (SM->isWrittenInMainFile(Loc))
724 return HandleDeclInMainFile(D);
725 }
726
727 //===----------------------------------------------------------------------===//
728 // Syntactic (non-AST) Rewriting Code
729 //===----------------------------------------------------------------------===//
730
731 void RewriteObjC::RewriteInclude() {
732 SourceLocation LocStart = SM->getLocForStartOfFile(MainFileID);
733 StringRef MainBuf = SM->getBufferData(MainFileID);
734 const char *MainBufStart = MainBuf.begin();
735 const char *MainBufEnd = MainBuf.end();
736 size_t ImportLen = strlen("import");
737
738 // Loop over the whole file, looking for includes.
739 for (const char *BufPtr = MainBufStart; BufPtr < MainBufEnd; ++BufPtr) {
740 if (*BufPtr == '#') {
741 if (++BufPtr == MainBufEnd)
742 return;
743 while (*BufPtr == ' ' || *BufPtr == '\t')
744 if (++BufPtr == MainBufEnd)
745 return;
746 if (!strncmp(BufPtr, "import", ImportLen)) {
747 // replace import with include
748 SourceLocation ImportLoc =
749 LocStart.getLocWithOffset(BufPtr-MainBufStart);
750 ReplaceText(ImportLoc, ImportLen, "include");
751 BufPtr += ImportLen;
752 }
753 }
754 }
755 }
756
757 static std::string getIvarAccessString(ObjCIvarDecl *OID) {
758 const ObjCInterfaceDecl *ClassDecl = OID->getContainingInterface();
759 std::string S;
760 S = "((struct ";
761 S += ClassDecl->getIdentifier()->getName();
762 S += "_IMPL *)self)->";
763 S += OID->getName();
764 return S;
765 }
766
767 void RewriteObjC::RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
768 ObjCImplementationDecl *IMD,
769 ObjCCategoryImplDecl *CID) {
770 static bool objcGetPropertyDefined = false;
771 static bool objcSetPropertyDefined = false;
772 SourceLocation startLoc = PID->getBeginLoc();
773 InsertText(startLoc, "// ");
774 const char *startBuf = SM->getCharacterData(startLoc);
775 assert((*startBuf == '@') && "bogus @synthesize location");
776 const char *semiBuf = strchr(startBuf, ';');
777 assert((*semiBuf == ';') && "@synthesize: can't find ';'");
778 SourceLocation onePastSemiLoc =
779 startLoc.getLocWithOffset(semiBuf-startBuf+1);
780
781 if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
782 return; // FIXME: is this correct?
783
784 // Generate the 'getter' function.
785 ObjCPropertyDecl *PD = PID->getPropertyDecl();
786 ObjCIvarDecl *OID = PID->getPropertyIvarDecl();
787
788 if (!OID)
789 return;
790 unsigned Attributes = PD->getPropertyAttributes();
791 if (!PD->getGetterMethodDecl()->isDefined()) {
792 bool GenGetProperty = !(Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) &&
793 (Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
794 ObjCPropertyDecl::OBJC_PR_copy));
795 std::string Getr;
796 if (GenGetProperty && !objcGetPropertyDefined) {
797 objcGetPropertyDefined = true;
798 // FIXME. Is this attribute correct in all cases?
799 Getr = "\nextern \"C\" __declspec(dllimport) "
800 "id objc_getProperty(id, SEL, long, bool);\n";
801 }
802 RewriteObjCMethodDecl(OID->getContainingInterface(),
803 PD->getGetterMethodDecl(), Getr);
804 Getr += "{ ";
805 // Synthesize an explicit cast to gain access to the ivar.
806 // See objc-act.c:objc_synthesize_new_getter() for details.
807 if (GenGetProperty) {
808 // return objc_getProperty(self, _cmd, offsetof(ClassDecl, OID), 1)
809 Getr += "typedef ";
810 const FunctionType *FPRetType = nullptr;
811 RewriteTypeIntoString(PD->getGetterMethodDecl()->getReturnType(), Getr,
812 FPRetType);
813 Getr += " _TYPE";
814 if (FPRetType) {
815 Getr += ")"; // close the precedence "scope" for "*".
816
817 // Now, emit the argument types (if any).
818 if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)){
819 Getr += "(";
820 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) {
821 if (i) Getr += ", ";
822 std::string ParamStr =
823 FT->getParamType(i).getAsString(Context->getPrintingPolicy());
824 Getr += ParamStr;
825 }
826 if (FT->isVariadic()) {
827 if (FT->getNumParams())
828 Getr += ", ";
829 Getr += "...";
830 }
831 Getr += ")";
832 } else
833 Getr += "()";
834 }
835 Getr += ";\n";
836 Getr += "return (_TYPE)";
837 Getr += "objc_getProperty(self, _cmd, ";
838 RewriteIvarOffsetComputation(OID, Getr);
839 Getr += ", 1)";
840 }
841 else
842 Getr += "return " + getIvarAccessString(OID);
843 Getr += "; }";
844 InsertText(onePastSemiLoc, Getr);
845 }
846
847 if (PD->isReadOnly() || PD->getSetterMethodDecl()->isDefined())
848 return;
849
850 // Generate the 'setter' function.
851 std::string Setr;
852 bool GenSetProperty = Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
853 ObjCPropertyDecl::OBJC_PR_copy);
854 if (GenSetProperty && !objcSetPropertyDefined) {
855 objcSetPropertyDefined = true;
856 // FIXME. Is this attribute correct in all cases?
857 Setr = "\nextern \"C\" __declspec(dllimport) "
858 "void objc_setProperty (id, SEL, long, id, bool, bool);\n";
859 }
860
861 RewriteObjCMethodDecl(OID->getContainingInterface(),
862 PD->getSetterMethodDecl(), Setr);
863 Setr += "{ ";
864 // Synthesize an explicit cast to initialize the ivar.
865 // See objc-act.c:objc_synthesize_new_setter() for details.
866 if (GenSetProperty) {
867 Setr += "objc_setProperty (self, _cmd, ";
868 RewriteIvarOffsetComputation(OID, Setr);
869 Setr += ", (id)";
870 Setr += PD->getName();
871 Setr += ", ";
872 if (Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic)
873 Setr += "0, ";
874 else
875 Setr += "1, ";
876 if (Attributes & ObjCPropertyDecl::OBJC_PR_copy)
877 Setr += "1)";
878 else
879 Setr += "0)";
880 }
881 else {
882 Setr += getIvarAccessString(OID) + " = ";
883 Setr += PD->getName();
884 }
885 Setr += "; }";
886 InsertText(onePastSemiLoc, Setr);
887 }
888
889 static void RewriteOneForwardClassDecl(ObjCInterfaceDecl *ForwardDecl,
890 std::string &typedefString) {
891 typedefString += "#ifndef _REWRITER_typedef_";
892 typedefString += ForwardDecl->getNameAsString();
893 typedefString += "\n";
894 typedefString += "#define _REWRITER_typedef_";
895 typedefString += ForwardDecl->getNameAsString();
896 typedefString += "\n";
897 typedefString += "typedef struct objc_object ";
898 typedefString += ForwardDecl->getNameAsString();
899 typedefString += ";\n#endif\n";
900 }
901
902 void RewriteObjC::RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
903 const std::string &typedefString) {
904 SourceLocation startLoc = ClassDecl->getBeginLoc();
905 const char *startBuf = SM->getCharacterData(startLoc);
906 const char *semiPtr = strchr(startBuf, ';');
907 // Replace the @class with typedefs corresponding to the classes.
908 ReplaceText(startLoc, semiPtr - startBuf + 1, typedefString);
909 }
910
911 void RewriteObjC::RewriteForwardClassDecl(DeclGroupRef D) {
912 std::string typedefString;
913 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
914 ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(*I);
915 if (I == D.begin()) {
916 // Translate to typedef's that forward reference structs with the same name
917 // as the class. As a convenience, we include the original declaration
918 // as a comment.
919 typedefString += "// @class ";
920 typedefString += ForwardDecl->getNameAsString();
921 typedefString += ";\n";
922 }
923 RewriteOneForwardClassDecl(ForwardDecl, typedefString);
924 }
925 DeclGroupRef::iterator I = D.begin();
926 RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(*I), typedefString);
927 }
928
929 void RewriteObjC::RewriteForwardClassDecl(const SmallVectorImpl<Decl *> &D) {
930 std::string typedefString;
931 for (unsigned i = 0; i < D.size(); i++) {
932 ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(D[i]);
933 if (i == 0) {
934 typedefString += "// @class ";
935 typedefString += ForwardDecl->getNameAsString();
936 typedefString += ";\n";
937 }
938 RewriteOneForwardClassDecl(ForwardDecl, typedefString);
939 }
940 RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(D[0]), typedefString);
941 }
942
943 void RewriteObjC::RewriteMethodDeclaration(ObjCMethodDecl *Method) {
944 // When method is a synthesized one, such as a getter/setter there is
945 // nothing to rewrite.
946 if (Method->isImplicit())
947 return;
948 SourceLocation LocStart = Method->getBeginLoc();
949 SourceLocation LocEnd = Method->getEndLoc();
950
951 if (SM->getExpansionLineNumber(LocEnd) >
952 SM->getExpansionLineNumber(LocStart)) {
953 InsertText(LocStart, "#if 0\n");
954 ReplaceText(LocEnd, 1, ";\n#endif\n");
955 } else {
956 InsertText(LocStart, "// ");
957 }
958 }
959
960 void RewriteObjC::RewriteProperty(ObjCPropertyDecl *prop) {
961 SourceLocation Loc = prop->getAtLoc();
962
963 ReplaceText(Loc, 0, "// ");
964 // FIXME: handle properties that are declared across multiple lines.
965 }
966
967 void RewriteObjC::RewriteCategoryDecl(ObjCCategoryDecl *CatDecl) {
968 SourceLocation LocStart = CatDecl->getBeginLoc();
969
970 // FIXME: handle category headers that are declared across multiple lines.
971 ReplaceText(LocStart, 0, "// ");
972
973 for (auto *I : CatDecl->instance_properties())
974 RewriteProperty(I);
975 for (auto *I : CatDecl->instance_methods())
976 RewriteMethodDeclaration(I);
977 for (auto *I : CatDecl->class_methods())
978 RewriteMethodDeclaration(I);
979
980 // Lastly, comment out the @end.
981 ReplaceText(CatDecl->getAtEndRange().getBegin(),
982 strlen("@end"), "/* @end */");
983 }
984
985 void RewriteObjC::RewriteProtocolDecl(ObjCProtocolDecl *PDecl) {
986 SourceLocation LocStart = PDecl->getBeginLoc();
987 assert(PDecl->isThisDeclarationADefinition());
988
989 // FIXME: handle protocol headers that are declared across multiple lines.
990 ReplaceText(LocStart, 0, "// ");
991
992 for (auto *I : PDecl->instance_methods())
993 RewriteMethodDeclaration(I);
994 for (auto *I : PDecl->class_methods())
995 RewriteMethodDeclaration(I);
996 for (auto *I : PDecl->instance_properties())
997 RewriteProperty(I);
998
999 // Lastly, comment out the @end.
1000 SourceLocation LocEnd = PDecl->getAtEndRange().getBegin();
1001 ReplaceText(LocEnd, strlen("@end"), "/* @end */");
1002
1003 // Must comment out @optional/@required
1004 const char *startBuf = SM->getCharacterData(LocStart);
1005 const char *endBuf = SM->getCharacterData(LocEnd);
1006 for (const char *p = startBuf; p < endBuf; p++) {
1007 if (*p == '@' && !strncmp(p+1, "optional", strlen("optional"))) {
1008 SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
1009 ReplaceText(OptionalLoc, strlen("@optional"), "/* @optional */");
1010
1011 }
1012 else if (*p == '@' && !strncmp(p+1, "required", strlen("required"))) {
1013 SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
1014 ReplaceText(OptionalLoc, strlen("@required"), "/* @required */");
1015
1016 }
1017 }
1018 }
1019
1020 void RewriteObjC::RewriteForwardProtocolDecl(DeclGroupRef D) {
1021 SourceLocation LocStart = (*D.begin())->getBeginLoc();
1022 if (LocStart.isInvalid())
1023 llvm_unreachable("Invalid SourceLocation");
1024 // FIXME: handle forward protocol that are declared across multiple lines.
1025 ReplaceText(LocStart, 0, "// ");
1026 }
1027
1028 void
1029 RewriteObjC::RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG) {
1030 SourceLocation LocStart = DG[0]->getBeginLoc();
1031 if (LocStart.isInvalid())
1032 llvm_unreachable("Invalid SourceLocation");
1033 // FIXME: handle forward protocol that are declared across multiple lines.
1034 ReplaceText(LocStart, 0, "// ");
1035 }
1036
1037 void RewriteObjC::RewriteTypeIntoString(QualType T, std::string &ResultStr,
1038 const FunctionType *&FPRetType) {
1039 if (T->isObjCQualifiedIdType())
1040 ResultStr += "id";
1041 else if (T->isFunctionPointerType() ||
1042 T->isBlockPointerType()) {
1043 // needs special handling, since pointer-to-functions have special
1044 // syntax (where a decaration models use).
1045 QualType retType = T;
1046 QualType PointeeTy;
1047 if (const PointerType* PT = retType->getAs<PointerType>())
1048 PointeeTy = PT->getPointeeType();
1049 else if (const BlockPointerType *BPT = retType->getAs<BlockPointerType>())
1050 PointeeTy = BPT->getPointeeType();
1051 if ((FPRetType = PointeeTy->getAs<FunctionType>())) {
1052 ResultStr +=
1053 FPRetType->getReturnType().getAsString(Context->getPrintingPolicy());
1054 ResultStr += "(*";
1055 }
1056 } else
1057 ResultStr += T.getAsString(Context->getPrintingPolicy());
1058 }
1059
1060 void RewriteObjC::RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
1061 ObjCMethodDecl *OMD,
1062 std::string &ResultStr) {
1063 //fprintf(stderr,"In RewriteObjCMethodDecl\n");
1064 const FunctionType *FPRetType = nullptr;
1065 ResultStr += "\nstatic ";
1066 RewriteTypeIntoString(OMD->getReturnType(), ResultStr, FPRetType);
1067 ResultStr += " ";
1068
1069 // Unique method name
1070 std::string NameStr;
1071
1072 if (OMD->isInstanceMethod())
1073 NameStr += "_I_";
1074 else
1075 NameStr += "_C_";
1076
1077 NameStr += IDecl->getNameAsString();
1078 NameStr += "_";
1079
1080 if (ObjCCategoryImplDecl *CID =
1081 dyn_cast<ObjCCategoryImplDecl>(OMD->getDeclContext())) {
1082 NameStr += CID->getNameAsString();
1083 NameStr += "_";
1084 }
1085 // Append selector names, replacing ':' with '_'
1086 {
1087 std::string selString = OMD->getSelector().getAsString();
1088 int len = selString.size();
1089 for (int i = 0; i < len; i++)
1090 if (selString[i] == ':')
1091 selString[i] = '_';
1092 NameStr += selString;
1093 }
1094 // Remember this name for metadata emission
1095 MethodInternalNames[OMD] = NameStr;
1096 ResultStr += NameStr;
1097
1098 // Rewrite arguments
1099 ResultStr += "(";
1100
1101 // invisible arguments
1102 if (OMD->isInstanceMethod()) {
1103 QualType selfTy = Context->getObjCInterfaceType(IDecl);
1104 selfTy = Context->getPointerType(selfTy);
1105 if (!LangOpts.MicrosoftExt) {
1106 if (ObjCSynthesizedStructs.count(const_cast<ObjCInterfaceDecl*>(IDecl)))
1107 ResultStr += "struct ";
1108 }
1109 // When rewriting for Microsoft, explicitly omit the structure name.
1110 ResultStr += IDecl->getNameAsString();
1111 ResultStr += " *";
1112 }
1113 else
1114 ResultStr += Context->getObjCClassType().getAsString(
1115 Context->getPrintingPolicy());
1116
1117 ResultStr += " self, ";
1118 ResultStr += Context->getObjCSelType().getAsString(Context->getPrintingPolicy());
1119 ResultStr += " _cmd";
1120
1121 // Method arguments.
1122 for (const auto *PDecl : OMD->parameters()) {
1123 ResultStr += ", ";
1124 if (PDecl->getType()->isObjCQualifiedIdType()) {
1125 ResultStr += "id ";
1126 ResultStr += PDecl->getNameAsString();
1127 } else {
1128 std::string Name = PDecl->getNameAsString();
1129 QualType QT = PDecl->getType();
1130 // Make sure we convert "t (^)(...)" to "t (*)(...)".
1131 (void)convertBlockPointerToFunctionPointer(QT);
1132 QT.getAsStringInternal(Name, Context->getPrintingPolicy());
1133 ResultStr += Name;
1134 }
1135 }
1136 if (OMD->isVariadic())
1137 ResultStr += ", ...";
1138 ResultStr += ") ";
1139
1140 if (FPRetType) {
1141 ResultStr += ")"; // close the precedence "scope" for "*".
1142
1143 // Now, emit the argument types (if any).
1144 if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)) {
1145 ResultStr += "(";
1146 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) {
1147 if (i) ResultStr += ", ";
1148 std::string ParamStr =
1149 FT->getParamType(i).getAsString(Context->getPrintingPolicy());
1150 ResultStr += ParamStr;
1151 }
1152 if (FT->isVariadic()) {
1153 if (FT->getNumParams())
1154 ResultStr += ", ";
1155 ResultStr += "...";
1156 }
1157 ResultStr += ")";
1158 } else {
1159 ResultStr += "()";
1160 }
1161 }
1162 }
1163
1164 void RewriteObjC::RewriteImplementationDecl(Decl *OID) {
1165 ObjCImplementationDecl *IMD = dyn_cast<ObjCImplementationDecl>(OID);
1166 ObjCCategoryImplDecl *CID = dyn_cast<ObjCCategoryImplDecl>(OID);
1167
1168 InsertText(IMD ? IMD->getBeginLoc() : CID->getBeginLoc(), "// ");
1169
1170 for (auto *OMD : IMD ? IMD->instance_methods() : CID->instance_methods()) {
1171 std::string ResultStr;
1172 RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
1173 SourceLocation LocStart = OMD->getBeginLoc();
1174 SourceLocation LocEnd = OMD->getCompoundBody()->getBeginLoc();
1175
1176 const char *startBuf = SM->getCharacterData(LocStart);
1177 const char *endBuf = SM->getCharacterData(LocEnd);
1178 ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1179 }
1180
1181 for (auto *OMD : IMD ? IMD->class_methods() : CID->class_methods()) {
1182 std::string ResultStr;
1183 RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
1184 SourceLocation LocStart = OMD->getBeginLoc();
1185 SourceLocation LocEnd = OMD->getCompoundBody()->getBeginLoc();
1186
1187 const char *startBuf = SM->getCharacterData(LocStart);
1188 const char *endBuf = SM->getCharacterData(LocEnd);
1189 ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1190 }
1191 for (auto *I : IMD ? IMD->property_impls() : CID->property_impls())
1192 RewritePropertyImplDecl(I, IMD, CID);
1193
1194 InsertText(IMD ? IMD->getEndLoc() : CID->getEndLoc(), "// ");
1195 }
1196
1197 void RewriteObjC::RewriteInterfaceDecl(ObjCInterfaceDecl *ClassDecl) {
1198 std::string ResultStr;
1199 if (!ObjCForwardDecls.count(ClassDecl->getCanonicalDecl())) {
1200 // we haven't seen a forward decl - generate a typedef.
1201 ResultStr = "#ifndef _REWRITER_typedef_";
1202 ResultStr += ClassDecl->getNameAsString();
1203 ResultStr += "\n";
1204 ResultStr += "#define _REWRITER_typedef_";
1205 ResultStr += ClassDecl->getNameAsString();
1206 ResultStr += "\n";
1207 ResultStr += "typedef struct objc_object ";
1208 ResultStr += ClassDecl->getNameAsString();
1209 ResultStr += ";\n#endif\n";
1210 // Mark this typedef as having been generated.
1211 ObjCForwardDecls.insert(ClassDecl->getCanonicalDecl());
1212 }
1213 RewriteObjCInternalStruct(ClassDecl, ResultStr);
1214
1215 for (auto *I : ClassDecl->instance_properties())
1216 RewriteProperty(I);
1217 for (auto *I : ClassDecl->instance_methods())
1218 RewriteMethodDeclaration(I);
1219 for (auto *I : ClassDecl->class_methods())
1220 RewriteMethodDeclaration(I);
1221
1222 // Lastly, comment out the @end.
1223 ReplaceText(ClassDecl->getAtEndRange().getBegin(), strlen("@end"),
1224 "/* @end */");
1225 }
1226
1227 Stmt *RewriteObjC::RewritePropertyOrImplicitSetter(PseudoObjectExpr *PseudoOp) {
1228 SourceRange OldRange = PseudoOp->getSourceRange();
1229
1230 // We just magically know some things about the structure of this
1231 // expression.
1232 ObjCMessageExpr *OldMsg =
1233 cast<ObjCMessageExpr>(PseudoOp->getSemanticExpr(
1234 PseudoOp->getNumSemanticExprs() - 1));
1235
1236 // Because the rewriter doesn't allow us to rewrite rewritten code,
1237 // we need to suppress rewriting the sub-statements.
1238 Expr *Base, *RHS;
1239 {
1240 DisableReplaceStmtScope S(*this);
1241
1242 // Rebuild the base expression if we have one.
1243 Base = nullptr;
1244 if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1245 Base = OldMsg->getInstanceReceiver();
1246 Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
1247 Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
1248 }
1249
1250 // Rebuild the RHS.
1251 RHS = cast<BinaryOperator>(PseudoOp->getSyntacticForm())->getRHS();
1252 RHS = cast<OpaqueValueExpr>(RHS)->getSourceExpr();
1253 RHS = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(RHS));
1254 }
1255
1256 // TODO: avoid this copy.
1257 SmallVector<SourceLocation, 1> SelLocs;
1258 OldMsg->getSelectorLocs(SelLocs);
1259
1260 ObjCMessageExpr *NewMsg = nullptr;
1261 switch (OldMsg->getReceiverKind()) {
1262 case ObjCMessageExpr::Class:
1263 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1264 OldMsg->getValueKind(),
1265 OldMsg->getLeftLoc(),
1266 OldMsg->getClassReceiverTypeInfo(),
1267 OldMsg->getSelector(),
1268 SelLocs,
1269 OldMsg->getMethodDecl(),
1270 RHS,
1271 OldMsg->getRightLoc(),
1272 OldMsg->isImplicit());
1273 break;
1274
1275 case ObjCMessageExpr::Instance:
1276 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1277 OldMsg->getValueKind(),
1278 OldMsg->getLeftLoc(),
1279 Base,
1280 OldMsg->getSelector(),
1281 SelLocs,
1282 OldMsg->getMethodDecl(),
1283 RHS,
1284 OldMsg->getRightLoc(),
1285 OldMsg->isImplicit());
1286 break;
1287
1288 case ObjCMessageExpr::SuperClass:
1289 case ObjCMessageExpr::SuperInstance:
1290 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1291 OldMsg->getValueKind(),
1292 OldMsg->getLeftLoc(),
1293 OldMsg->getSuperLoc(),
1294 OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1295 OldMsg->getSuperType(),
1296 OldMsg->getSelector(),
1297 SelLocs,
1298 OldMsg->getMethodDecl(),
1299 RHS,
1300 OldMsg->getRightLoc(),
1301 OldMsg->isImplicit());
1302 break;
1303 }
1304
1305 Stmt *Replacement = SynthMessageExpr(NewMsg);
1306 ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
1307 return Replacement;
1308 }
1309
1310 Stmt *RewriteObjC::RewritePropertyOrImplicitGetter(PseudoObjectExpr *PseudoOp) {
1311 SourceRange OldRange = PseudoOp->getSourceRange();
1312
1313 // We just magically know some things about the structure of this
1314 // expression.
1315 ObjCMessageExpr *OldMsg =
1316 cast<ObjCMessageExpr>(PseudoOp->getResultExpr()->IgnoreImplicit());
1317
1318 // Because the rewriter doesn't allow us to rewrite rewritten code,
1319 // we need to suppress rewriting the sub-statements.
1320 Expr *Base = nullptr;
1321 {
1322 DisableReplaceStmtScope S(*this);
1323
1324 // Rebuild the base expression if we have one.
1325 if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1326 Base = OldMsg->getInstanceReceiver();
1327 Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
1328 Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
1329 }
1330 }
1331
1332 // Intentionally empty.
1333 SmallVector<SourceLocation, 1> SelLocs;
1334 SmallVector<Expr*, 1> Args;
1335
1336 ObjCMessageExpr *NewMsg = nullptr;
1337 switch (OldMsg->getReceiverKind()) {
1338 case ObjCMessageExpr::Class:
1339 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1340 OldMsg->getValueKind(),
1341 OldMsg->getLeftLoc(),
1342 OldMsg->getClassReceiverTypeInfo(),
1343 OldMsg->getSelector(),
1344 SelLocs,
1345 OldMsg->getMethodDecl(),
1346 Args,
1347 OldMsg->getRightLoc(),
1348 OldMsg->isImplicit());
1349 break;
1350
1351 case ObjCMessageExpr::Instance:
1352 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1353 OldMsg->getValueKind(),
1354 OldMsg->getLeftLoc(),
1355 Base,
1356 OldMsg->getSelector(),
1357 SelLocs,
1358 OldMsg->getMethodDecl(),
1359 Args,
1360 OldMsg->getRightLoc(),
1361 OldMsg->isImplicit());
1362 break;
1363
1364 case ObjCMessageExpr::SuperClass:
1365 case ObjCMessageExpr::SuperInstance:
1366 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1367 OldMsg->getValueKind(),
1368 OldMsg->getLeftLoc(),
1369 OldMsg->getSuperLoc(),
1370 OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1371 OldMsg->getSuperType(),
1372 OldMsg->getSelector(),
1373 SelLocs,
1374 OldMsg->getMethodDecl(),
1375 Args,
1376 OldMsg->getRightLoc(),
1377 OldMsg->isImplicit());
1378 break;
1379 }
1380
1381 Stmt *Replacement = SynthMessageExpr(NewMsg);
1382 ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
1383 return Replacement;
1384 }
1385
1386 /// SynthCountByEnumWithState - To print:
1387 /// ((unsigned int (*)
1388 /// (id, SEL, struct __objcFastEnumerationState *, id *, unsigned int))
1389 /// (void *)objc_msgSend)((id)l_collection,
1390 /// sel_registerName(
1391 /// "countByEnumeratingWithState:objects:count:"),
1392 /// &enumState,
1393 /// (id *)__rw_items, (unsigned int)16)
1394 ///
1395 void RewriteObjC::SynthCountByEnumWithState(std::string &buf) {
1396 buf += "((unsigned int (*) (id, SEL, struct __objcFastEnumerationState *, "
1397 "id *, unsigned int))(void *)objc_msgSend)";
1398 buf += "\n\t\t";
1399 buf += "((id)l_collection,\n\t\t";
1400 buf += "sel_registerName(\"countByEnumeratingWithState:objects:count:\"),";
1401 buf += "\n\t\t";
1402 buf += "&enumState, "
1403 "(id *)__rw_items, (unsigned int)16)";
1404 }
1405
1406 /// RewriteBreakStmt - Rewrite for a break-stmt inside an ObjC2's foreach
1407 /// statement to exit to its outer synthesized loop.
1408 ///
1409 Stmt *RewriteObjC::RewriteBreakStmt(BreakStmt *S) {
1410 if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
1411 return S;
1412 // replace break with goto __break_label
1413 std::string buf;
1414
1415 SourceLocation startLoc = S->getBeginLoc();
1416 buf = "goto __break_label_";
1417 buf += utostr(ObjCBcLabelNo.back());
1418 ReplaceText(startLoc, strlen("break"), buf);
1419
1420 return nullptr;
1421 }
1422
1423 /// RewriteContinueStmt - Rewrite for a continue-stmt inside an ObjC2's foreach
1424 /// statement to continue with its inner synthesized loop.
1425 ///
1426 Stmt *RewriteObjC::RewriteContinueStmt(ContinueStmt *S) {
1427 if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
1428 return S;
1429 // replace continue with goto __continue_label
1430 std::string buf;
1431
1432 SourceLocation startLoc = S->getBeginLoc();
1433 buf = "goto __continue_label_";
1434 buf += utostr(ObjCBcLabelNo.back());
1435 ReplaceText(startLoc, strlen("continue"), buf);
1436
1437 return nullptr;
1438 }
1439
1440 /// RewriteObjCForCollectionStmt - Rewriter for ObjC2's foreach statement.
1441 /// It rewrites:
1442 /// for ( type elem in collection) { stmts; }
1443
1444 /// Into:
1445 /// {
1446 /// type elem;
1447 /// struct __objcFastEnumerationState enumState = { 0 };
1448 /// id __rw_items[16];
1449 /// id l_collection = (id)collection;
1450 /// unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
1451 /// objects:__rw_items count:16];
1452 /// if (limit) {
1453 /// unsigned long startMutations = *enumState.mutationsPtr;
1454 /// do {
1455 /// unsigned long counter = 0;
1456 /// do {
1457 /// if (startMutations != *enumState.mutationsPtr)
1458 /// objc_enumerationMutation(l_collection);
1459 /// elem = (type)enumState.itemsPtr[counter++];
1460 /// stmts;
1461 /// __continue_label: ;
1462 /// } while (counter < limit);
1463 /// } while (limit = [l_collection countByEnumeratingWithState:&enumState
1464 /// objects:__rw_items count:16]);
1465 /// elem = nil;
1466 /// __break_label: ;
1467 /// }
1468 /// else
1469 /// elem = nil;
1470 /// }
1471 ///
1472 Stmt *RewriteObjC::RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
1473 SourceLocation OrigEnd) {
1474 assert(!Stmts.empty() && "ObjCForCollectionStmt - Statement stack empty");
1475 assert(isa<ObjCForCollectionStmt>(Stmts.back()) &&
1476 "ObjCForCollectionStmt Statement stack mismatch");
1477 assert(!ObjCBcLabelNo.empty() &&
1478 "ObjCForCollectionStmt - Label No stack empty");
1479
1480 SourceLocation startLoc = S->getBeginLoc();
1481 const char *startBuf = SM->getCharacterData(startLoc);
1482 StringRef elementName;
1483 std::string elementTypeAsString;
1484 std::string buf;
1485 buf = "\n{\n\t";
1486 if (DeclStmt *DS = dyn_cast<DeclStmt>(S->getElement())) {
1487 // type elem;
1488 NamedDecl* D = cast<NamedDecl>(DS->getSingleDecl());
1489 QualType ElementType = cast<ValueDecl>(D)->getType();
1490 if (ElementType->isObjCQualifiedIdType() ||
1491 ElementType->isObjCQualifiedInterfaceType())
1492 // Simply use 'id' for all qualified types.
1493 elementTypeAsString = "id";
1494 else
1495 elementTypeAsString = ElementType.getAsString(Context->getPrintingPolicy());
1496 buf += elementTypeAsString;
1497 buf += " ";
1498 elementName = D->getName();
1499 buf += elementName;
1500 buf += ";\n\t";
1501 }
1502 else {
1503 DeclRefExpr *DR = cast<DeclRefExpr>(S->getElement());
1504 elementName = DR->getDecl()->getName();
1505 ValueDecl *VD = DR->getDecl();
1506 if (VD->getType()->isObjCQualifiedIdType() ||
1507 VD->getType()->isObjCQualifiedInterfaceType())
1508 // Simply use 'id' for all qualified types.
1509 elementTypeAsString = "id";
1510 else
1511 elementTypeAsString = VD->getType().getAsString(Context->getPrintingPolicy());
1512 }
1513
1514 // struct __objcFastEnumerationState enumState = { 0 };
1515 buf += "struct __objcFastEnumerationState enumState = { 0 };\n\t";
1516 // id __rw_items[16];
1517 buf += "id __rw_items[16];\n\t";
1518 // id l_collection = (id)
1519 buf += "id l_collection = (id)";
1520 // Find start location of 'collection' the hard way!
1521 const char *startCollectionBuf = startBuf;
1522 startCollectionBuf += 3; // skip 'for'
1523 startCollectionBuf = strchr(startCollectionBuf, '(');
1524 startCollectionBuf++; // skip '('
1525 // find 'in' and skip it.
1526 while (*startCollectionBuf != ' ' ||
1527 *(startCollectionBuf+1) != 'i' || *(startCollectionBuf+2) != 'n' ||
1528 (*(startCollectionBuf+3) != ' ' &&
1529 *(startCollectionBuf+3) != '[' && *(startCollectionBuf+3) != '('))
1530 startCollectionBuf++;
1531 startCollectionBuf += 3;
1532
1533 // Replace: "for (type element in" with string constructed thus far.
1534 ReplaceText(startLoc, startCollectionBuf - startBuf, buf);
1535 // Replace ')' in for '(' type elem in collection ')' with ';'
1536 SourceLocation rightParenLoc = S->getRParenLoc();
1537 const char *rparenBuf = SM->getCharacterData(rightParenLoc);
1538 SourceLocation lparenLoc = startLoc.getLocWithOffset(rparenBuf-startBuf);
1539 buf = ";\n\t";
1540
1541 // unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
1542 // objects:__rw_items count:16];
1543 // which is synthesized into:
1544 // unsigned int limit =
1545 // ((unsigned int (*)
1546 // (id, SEL, struct __objcFastEnumerationState *, id *, unsigned int))
1547 // (void *)objc_msgSend)((id)l_collection,
1548 // sel_registerName(
1549 // "countByEnumeratingWithState:objects:count:"),
1550 // (struct __objcFastEnumerationState *)&state,
1551 // (id *)__rw_items, (unsigned int)16);
1552 buf += "unsigned long limit =\n\t\t";
1553 SynthCountByEnumWithState(buf);
1554 buf += ";\n\t";
1555 /// if (limit) {
1556 /// unsigned long startMutations = *enumState.mutationsPtr;
1557 /// do {
1558 /// unsigned long counter = 0;
1559 /// do {
1560 /// if (startMutations != *enumState.mutationsPtr)
1561 /// objc_enumerationMutation(l_collection);
1562 /// elem = (type)enumState.itemsPtr[counter++];
1563 buf += "if (limit) {\n\t";
1564 buf += "unsigned long startMutations = *enumState.mutationsPtr;\n\t";
1565 buf += "do {\n\t\t";
1566 buf += "unsigned long counter = 0;\n\t\t";
1567 buf += "do {\n\t\t\t";
1568 buf += "if (startMutations != *enumState.mutationsPtr)\n\t\t\t\t";
1569 buf += "objc_enumerationMutation(l_collection);\n\t\t\t";
1570 buf += elementName;
1571 buf += " = (";
1572 buf += elementTypeAsString;
1573 buf += ")enumState.itemsPtr[counter++];";
1574 // Replace ')' in for '(' type elem in collection ')' with all of these.
1575 ReplaceText(lparenLoc, 1, buf);
1576
1577 /// __continue_label: ;
1578 /// } while (counter < limit);
1579 /// } while (limit = [l_collection countByEnumeratingWithState:&enumState
1580 /// objects:__rw_items count:16]);
1581 /// elem = nil;
1582 /// __break_label: ;
1583 /// }
1584 /// else
1585 /// elem = nil;
1586 /// }
1587 ///
1588 buf = ";\n\t";
1589 buf += "__continue_label_";
1590 buf += utostr(ObjCBcLabelNo.back());
1591 buf += ": ;";
1592 buf += "\n\t\t";
1593 buf += "} while (counter < limit);\n\t";
1594 buf += "} while (limit = ";
1595 SynthCountByEnumWithState(buf);
1596 buf += ");\n\t";
1597 buf += elementName;
1598 buf += " = ((";
1599 buf += elementTypeAsString;
1600 buf += ")0);\n\t";
1601 buf += "__break_label_";
1602 buf += utostr(ObjCBcLabelNo.back());
1603 buf += ": ;\n\t";
1604 buf += "}\n\t";
1605 buf += "else\n\t\t";
1606 buf += elementName;
1607 buf += " = ((";
1608 buf += elementTypeAsString;
1609 buf += ")0);\n\t";
1610 buf += "}\n";
1611
1612 // Insert all these *after* the statement body.
1613 // FIXME: If this should support Obj-C++, support CXXTryStmt
1614 if (isa<CompoundStmt>(S->getBody())) {
1615 SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(1);
1616 InsertText(endBodyLoc, buf);
1617 } else {
1618 /* Need to treat single statements specially. For example:
1619 *
1620 * for (A *a in b) if (stuff()) break;
1621 * for (A *a in b) xxxyy;
1622 *
1623 * The following code simply scans ahead to the semi to find the actual end.
1624 */
1625 const char *stmtBuf = SM->getCharacterData(OrigEnd);
1626 const char *semiBuf = strchr(stmtBuf, ';');
1627 assert(semiBuf && "Can't find ';'");
1628 SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(semiBuf-stmtBuf+1);
1629 InsertText(endBodyLoc, buf);
1630 }
1631 Stmts.pop_back();
1632 ObjCBcLabelNo.pop_back();
1633 return nullptr;
1634 }
1635
1636 /// RewriteObjCSynchronizedStmt -
1637 /// This routine rewrites @synchronized(expr) stmt;
1638 /// into:
1639 /// objc_sync_enter(expr);
1640 /// @try stmt @finally { objc_sync_exit(expr); }
1641 ///
1642 Stmt *RewriteObjC::RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
1643 // Get the start location and compute the semi location.
1644 SourceLocation startLoc = S->getBeginLoc();
1645 const char *startBuf = SM->getCharacterData(startLoc);
1646
1647 assert((*startBuf == '@') && "bogus @synchronized location");
1648
1649 std::string buf;
1650 buf = "objc_sync_enter((id)";
1651 const char *lparenBuf = startBuf;
1652 while (*lparenBuf != '(') lparenBuf++;
1653 ReplaceText(startLoc, lparenBuf-startBuf+1, buf);
1654 // We can't use S->getSynchExpr()->getEndLoc() to find the end location, since
1655 // the sync expression is typically a message expression that's already
1656 // been rewritten! (which implies the SourceLocation's are invalid).
1657 SourceLocation endLoc = S->getSynchBody()->getBeginLoc();
1658 const char *endBuf = SM->getCharacterData(endLoc);
1659 while (*endBuf != ')') endBuf--;
1660 SourceLocation rparenLoc = startLoc.getLocWithOffset(endBuf-startBuf);
1661 buf = ");\n";
1662 // declare a new scope with two variables, _stack and _rethrow.
1663 buf += "/* @try scope begin */ \n{ struct _objc_exception_data {\n";
1664 buf += "int buf[18/*32-bit i386*/];\n";
1665 buf += "char *pointers[4];} _stack;\n";
1666 buf += "id volatile _rethrow = 0;\n";
1667 buf += "objc_exception_try_enter(&_stack);\n";
1668 buf += "if (!_setjmp(_stack.buf)) /* @try block continue */\n";
1669 ReplaceText(rparenLoc, 1, buf);
1670 startLoc = S->getSynchBody()->getEndLoc();
1671 startBuf = SM->getCharacterData(startLoc);
1672
1673 assert((*startBuf == '}') && "bogus @synchronized block");
1674 SourceLocation lastCurlyLoc = startLoc;
1675 buf = "}\nelse {\n";
1676 buf += " _rethrow = objc_exception_extract(&_stack);\n";
1677 buf += "}\n";
1678 buf += "{ /* implicit finally clause */\n";
1679 buf += " if (!_rethrow) objc_exception_try_exit(&_stack);\n";
1680
1681 std::string syncBuf;
1682 syncBuf += " objc_sync_exit(";
1683
1684 Expr *syncExpr = S->getSynchExpr();
1685 CastKind CK = syncExpr->getType()->isObjCObjectPointerType()
1686 ? CK_BitCast :
1687 syncExpr->getType()->isBlockPointerType()
1688 ? CK_BlockPointerToObjCPointerCast
1689 : CK_CPointerToObjCPointerCast;
1690 syncExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
1691 CK, syncExpr);
1692 std::string syncExprBufS;
1693 llvm::raw_string_ostream syncExprBuf(syncExprBufS);
1694 assert(syncExpr != nullptr && "Expected non-null Expr");
1695 syncExpr->printPretty(syncExprBuf, nullptr, PrintingPolicy(LangOpts));
1696 syncBuf += syncExprBuf.str();
1697 syncBuf += ");";
1698
1699 buf += syncBuf;
1700 buf += "\n if (_rethrow) objc_exception_throw(_rethrow);\n";
1701 buf += "}\n";
1702 buf += "}";
1703
1704 ReplaceText(lastCurlyLoc, 1, buf);
1705
1706 bool hasReturns = false;
1707 HasReturnStmts(S->getSynchBody(), hasReturns);
1708 if (hasReturns)
1709 RewriteSyncReturnStmts(S->getSynchBody(), syncBuf);
1710
1711 return nullptr;
1712 }
1713
1714 void RewriteObjC::WarnAboutReturnGotoStmts(Stmt *S)
1715 {
1716 // Perform a bottom up traversal of all children.
1717 for (Stmt *SubStmt : S->children())
1718 if (SubStmt)
1719 WarnAboutReturnGotoStmts(SubStmt);
1720
1721 if (isa<ReturnStmt>(S) || isa<GotoStmt>(S)) {
1722 Diags.Report(Context->getFullLoc(S->getBeginLoc()),
1723 TryFinallyContainsReturnDiag);
1724 }
1725 }
1726
1727 void RewriteObjC::HasReturnStmts(Stmt *S, bool &hasReturns)
1728 {
1729 // Perform a bottom up traversal of all children.
1730 for (Stmt *SubStmt : S->children())
1731 if (SubStmt)
1732 HasReturnStmts(SubStmt, hasReturns);
1733
1734 if (isa<ReturnStmt>(S))
1735 hasReturns = true;
1736 }
1737
1738 void RewriteObjC::RewriteTryReturnStmts(Stmt *S) {
1739 // Perform a bottom up traversal of all children.
1740 for (Stmt *SubStmt : S->children())
1741 if (SubStmt) {
1742 RewriteTryReturnStmts(SubStmt);
1743 }
1744 if (isa<ReturnStmt>(S)) {
1745 SourceLocation startLoc = S->getBeginLoc();
1746 const char *startBuf = SM->getCharacterData(startLoc);
1747 const char *semiBuf = strchr(startBuf, ';');
1748 assert((*semiBuf == ';') && "RewriteTryReturnStmts: can't find ';'");
1749 SourceLocation onePastSemiLoc = startLoc.getLocWithOffset(semiBuf-startBuf+1);
1750
1751 std::string buf;
1752 buf = "{ objc_exception_try_exit(&_stack); return";
1753
1754 ReplaceText(startLoc, 6, buf);
1755 InsertText(onePastSemiLoc, "}");
1756 }
1757 }
1758
1759 void RewriteObjC::RewriteSyncReturnStmts(Stmt *S, std::string syncExitBuf) {
1760 // Perform a bottom up traversal of all children.
1761 for (Stmt *SubStmt : S->children())
1762 if (SubStmt) {
1763 RewriteSyncReturnStmts(SubStmt, syncExitBuf);
1764 }
1765 if (isa<ReturnStmt>(S)) {
1766 SourceLocation startLoc = S->getBeginLoc();
1767 const char *startBuf = SM->getCharacterData(startLoc);
1768
1769 const char *semiBuf = strchr(startBuf, ';');
1770 assert((*semiBuf == ';') && "RewriteSyncReturnStmts: can't find ';'");
1771 SourceLocation onePastSemiLoc = startLoc.getLocWithOffset(semiBuf-startBuf+1);
1772
1773 std::string buf;
1774 buf = "{ objc_exception_try_exit(&_stack);";
1775 buf += syncExitBuf;
1776 buf += " return";
1777
1778 ReplaceText(startLoc, 6, buf);
1779 InsertText(onePastSemiLoc, "}");
1780 }
1781 }
1782
1783 Stmt *RewriteObjC::RewriteObjCTryStmt(ObjCAtTryStmt *S) {
1784 // Get the start location and compute the semi location.
1785 SourceLocation startLoc = S->getBeginLoc();
1786 const char *startBuf = SM->getCharacterData(startLoc);
1787
1788 assert((*startBuf == '@') && "bogus @try location");
1789
1790 std::string buf;
1791 // declare a new scope with two variables, _stack and _rethrow.
1792 buf = "/* @try scope begin */ { struct _objc_exception_data {\n";
1793 buf += "int buf[18/*32-bit i386*/];\n";
1794 buf += "char *pointers[4];} _stack;\n";
1795 buf += "id volatile _rethrow = 0;\n";
1796 buf += "objc_exception_try_enter(&_stack);\n";
1797 buf += "if (!_setjmp(_stack.buf)) /* @try block continue */\n";
1798
1799 ReplaceText(startLoc, 4, buf);
1800
1801 startLoc = S->getTryBody()->getEndLoc();
1802 startBuf = SM->getCharacterData(startLoc);
1803
1804 assert((*startBuf == '}') && "bogus @try block");
1805
1806 SourceLocation lastCurlyLoc = startLoc;
1807 if (S->getNumCatchStmts()) {
1808 startLoc = startLoc.getLocWithOffset(1);
1809 buf = " /* @catch begin */ else {\n";
1810 buf += " id _caught = objc_exception_extract(&_stack);\n";
1811 buf += " objc_exception_try_enter (&_stack);\n";
1812 buf += " if (_setjmp(_stack.buf))\n";
1813 buf += " _rethrow = objc_exception_extract(&_stack);\n";
1814 buf += " else { /* @catch continue */";
1815
1816 InsertText(startLoc, buf);
1817 } else { /* no catch list */
1818 buf = "}\nelse {\n";
1819 buf += " _rethrow = objc_exception_extract(&_stack);\n";
1820 buf += "}";
1821 ReplaceText(lastCurlyLoc, 1, buf);
1822 }
1823 Stmt *lastCatchBody = nullptr;
1824 for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I) {
1825 ObjCAtCatchStmt *Catch = S->getCatchStmt(I);
1826 VarDecl *catchDecl = Catch->getCatchParamDecl();
1827
1828 if (I == 0)
1829 buf = "if ("; // we are generating code for the first catch clause
1830 else
1831 buf = "else if (";
1832 startLoc = Catch->getBeginLoc();
1833 startBuf = SM->getCharacterData(startLoc);
1834
1835 assert((*startBuf == '@') && "bogus @catch location");
1836
1837 const char *lParenLoc = strchr(startBuf, '(');
1838
1839 if (Catch->hasEllipsis()) {
1840 // Now rewrite the body...
1841 lastCatchBody = Catch->getCatchBody();
1842 SourceLocation bodyLoc = lastCatchBody->getBeginLoc();
1843 const char *bodyBuf = SM->getCharacterData(bodyLoc);
1844 assert(*SM->getCharacterData(Catch->getRParenLoc()) == ')' &&
1845 "bogus @catch paren location");
1846 assert((*bodyBuf == '{') && "bogus @catch body location");
1847
1848 buf += "1) { id _tmp = _caught;";
1849 Rewrite.ReplaceText(startLoc, bodyBuf-startBuf+1, buf);
1850 } else if (catchDecl) {
1851 QualType t = catchDecl->getType();
1852 if (t == Context->getObjCIdType()) {
1853 buf += "1) { ";
1854 ReplaceText(startLoc, lParenLoc-startBuf+1, buf);
1855 } else if (const ObjCObjectPointerType *Ptr =
1856 t->getAs<ObjCObjectPointerType>()) {
1857 // Should be a pointer to a class.
1858 ObjCInterfaceDecl *IDecl = Ptr->getObjectType()->getInterface();
1859 if (IDecl) {
1860 buf += "objc_exception_match((struct objc_class *)objc_getClass(\"";
1861 buf += IDecl->getNameAsString();
1862 buf += "\"), (struct objc_object *)_caught)) { ";
1863 ReplaceText(startLoc, lParenLoc-startBuf+1, buf);
1864 }
1865 }
1866 // Now rewrite the body...
1867 lastCatchBody = Catch->getCatchBody();
1868 SourceLocation rParenLoc = Catch->getRParenLoc();
1869 SourceLocation bodyLoc = lastCatchBody->getBeginLoc();
1870 const char *bodyBuf = SM->getCharacterData(bodyLoc);
1871 const char *rParenBuf = SM->getCharacterData(rParenLoc);
1872 assert((*rParenBuf == ')') && "bogus @catch paren location");
1873 assert((*bodyBuf == '{') && "bogus @catch body location");
1874
1875 // Here we replace ") {" with "= _caught;" (which initializes and
1876 // declares the @catch parameter).
1877 ReplaceText(rParenLoc, bodyBuf-rParenBuf+1, " = _caught;");
1878 } else {
1879 llvm_unreachable("@catch rewrite bug");
1880 }
1881 }
1882 // Complete the catch list...
1883 if (lastCatchBody) {
1884 SourceLocation bodyLoc = lastCatchBody->getEndLoc();
1885 assert(*SM->getCharacterData(bodyLoc) == '}' &&
1886 "bogus @catch body location");
1887
1888 // Insert the last (implicit) else clause *before* the right curly brace.
1889 bodyLoc = bodyLoc.getLocWithOffset(-1);
1890 buf = "} /* last catch end */\n";
1891 buf += "else {\n";
1892 buf += " _rethrow = _caught;\n";
1893 buf += " objc_exception_try_exit(&_stack);\n";
1894 buf += "} } /* @catch end */\n";
1895 if (!S->getFinallyStmt())
1896 buf += "}\n";
1897 InsertText(bodyLoc, buf);
1898
1899 // Set lastCurlyLoc
1900 lastCurlyLoc = lastCatchBody->getEndLoc();
1901 }
1902 if (ObjCAtFinallyStmt *finalStmt = S->getFinallyStmt()) {
1903 startLoc = finalStmt->getBeginLoc();
1904 startBuf = SM->getCharacterData(startLoc);
1905 assert((*startBuf == '@') && "bogus @finally start");
1906
1907 ReplaceText(startLoc, 8, "/* @finally */");
1908
1909 Stmt *body = finalStmt->getFinallyBody();
1910 SourceLocation startLoc = body->getBeginLoc();
1911 SourceLocation endLoc = body->getEndLoc();
1912 assert(*SM->getCharacterData(startLoc) == '{' &&
1913 "bogus @finally body location");
1914 assert(*SM->getCharacterData(endLoc) == '}' &&
1915 "bogus @finally body location");
1916
1917 startLoc = startLoc.getLocWithOffset(1);
1918 InsertText(startLoc, " if (!_rethrow) objc_exception_try_exit(&_stack);\n");
1919 endLoc = endLoc.getLocWithOffset(-1);
1920 InsertText(endLoc, " if (_rethrow) objc_exception_throw(_rethrow);\n");
1921
1922 // Set lastCurlyLoc
1923 lastCurlyLoc = body->getEndLoc();
1924
1925 // Now check for any return/continue/go statements within the @try.
1926 WarnAboutReturnGotoStmts(S->getTryBody());
1927 } else { /* no finally clause - make sure we synthesize an implicit one */
1928 buf = "{ /* implicit finally clause */\n";
1929 buf += " if (!_rethrow) objc_exception_try_exit(&_stack);\n";
1930 buf += " if (_rethrow) objc_exception_throw(_rethrow);\n";
1931 buf += "}";
1932 ReplaceText(lastCurlyLoc, 1, buf);
1933
1934 // Now check for any return/continue/go statements within the @try.
1935 // The implicit finally clause won't called if the @try contains any
1936 // jump statements.
1937 bool hasReturns = false;
1938 HasReturnStmts(S->getTryBody(), hasReturns);
1939 if (hasReturns)
1940 RewriteTryReturnStmts(S->getTryBody());
1941 }
1942 // Now emit the final closing curly brace...
1943 lastCurlyLoc = lastCurlyLoc.getLocWithOffset(1);
1944 InsertText(lastCurlyLoc, " } /* @try scope end */\n");
1945 return nullptr;
1946 }
1947
1948 // This can't be done with ReplaceStmt(S, ThrowExpr), since
1949 // the throw expression is typically a message expression that's already
1950 // been rewritten! (which implies the SourceLocation's are invalid).
1951 Stmt *RewriteObjC::RewriteObjCThrowStmt(ObjCAtThrowStmt *S) {
1952 // Get the start location and compute the semi location.
1953 SourceLocation startLoc = S->getBeginLoc();
1954 const char *startBuf = SM->getCharacterData(startLoc);
1955
1956 assert((*startBuf == '@') && "bogus @throw location");
1957
1958 std::string buf;
1959 /* void objc_exception_throw(id) __attribute__((noreturn)); */
1960 if (S->getThrowExpr())
1961 buf = "objc_exception_throw(";
1962 else // add an implicit argument
1963 buf = "objc_exception_throw(_caught";
1964
1965 // handle "@ throw" correctly.
1966 const char *wBuf = strchr(startBuf, 'w');
1967 assert((*wBuf == 'w') && "@throw: can't find 'w'");
1968 ReplaceText(startLoc, wBuf-startBuf+1, buf);
1969
1970 const char *semiBuf = strchr(startBuf, ';');
1971 assert((*semiBuf == ';') && "@throw: can't find ';'");
1972 SourceLocation semiLoc = startLoc.getLocWithOffset(semiBuf-startBuf);
1973 ReplaceText(semiLoc, 1, ");");
1974 return nullptr;
1975 }
1976
1977 Stmt *RewriteObjC::RewriteAtEncode(ObjCEncodeExpr *Exp) {
1978 // Create a new string expression.
1979 std::string StrEncoding;
1980 Context->getObjCEncodingForType(Exp->getEncodedType(), StrEncoding);
1981 Expr *Replacement = getStringLiteral(StrEncoding);
1982 ReplaceStmt(Exp, Replacement);
1983
1984 // Replace this subexpr in the parent.
1985 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
1986 return Replacement;
1987 }
1988
1989 Stmt *RewriteObjC::RewriteAtSelector(ObjCSelectorExpr *Exp) {
1990 if (!SelGetUidFunctionDecl)
1991 SynthSelGetUidFunctionDecl();
1992 assert(SelGetUidFunctionDecl && "Can't find sel_registerName() decl");
1993 // Create a call to sel_registerName("selName").
1994 SmallVector<Expr*, 8> SelExprs;
1995 SelExprs.push_back(getStringLiteral(Exp->getSelector().getAsString()));
1996 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
1997 SelExprs);
1998 ReplaceStmt(Exp, SelExp);
1999 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2000 return SelExp;
2001 }
2002
2003 CallExpr *
2004 RewriteObjC::SynthesizeCallToFunctionDecl(FunctionDecl *FD,
2005 ArrayRef<Expr *> Args,
2006 SourceLocation StartLoc,
2007 SourceLocation EndLoc) {
2008 // Get the type, we will need to reference it in a couple spots.
2009 QualType msgSendType = FD->getType();
2010
2011 // Create a reference to the objc_msgSend() declaration.
2012 DeclRefExpr *DRE = new (Context) DeclRefExpr(*Context, FD, false, msgSendType,
2013 VK_LValue, SourceLocation());
2014
2015 // Now, we cast the reference to a pointer to the objc_msgSend type.
2016 QualType pToFunc = Context->getPointerType(msgSendType);
2017 ImplicitCastExpr *ICE =
2018 ImplicitCastExpr::Create(*Context, pToFunc, CK_FunctionToPointerDecay,
2019 DRE, nullptr, VK_RValue);
2020
2021 const FunctionType *FT = msgSendType->getAs<FunctionType>();
2022
2023 CallExpr *Exp = CallExpr::Create(
2024 *Context, ICE, Args, FT->getCallResultType(*Context), VK_RValue, EndLoc);
2025 return Exp;
2026 }
2027
2028 static bool scanForProtocolRefs(const char *startBuf, const char *endBuf,
2029 const char *&startRef, const char *&endRef) {
2030 while (startBuf < endBuf) {
2031 if (*startBuf == '<')
2032 startRef = startBuf; // mark the start.
2033 if (*startBuf == '>') {
2034 if (startRef && *startRef == '<') {
2035 endRef = startBuf; // mark the end.
2036 return true;
2037 }
2038 return false;
2039 }
2040 startBuf++;
2041 }
2042 return false;
2043 }
2044
2045 static void scanToNextArgument(const char *&argRef) {
2046 int angle = 0;
2047 while (*argRef != ')' && (*argRef != ',' || angle > 0)) {
2048 if (*argRef == '<')
2049 angle++;
2050 else if (*argRef == '>')
2051 angle--;
2052 argRef++;
2053 }
2054 assert(angle == 0 && "scanToNextArgument - bad protocol type syntax");
2055 }
2056
2057 bool RewriteObjC::needToScanForQualifiers(QualType T) {
2058 if (T->isObjCQualifiedIdType())
2059 return true;
2060 if (const PointerType *PT = T->getAs<PointerType>()) {
2061 if (PT->getPointeeType()->isObjCQualifiedIdType())
2062 return true;
2063 }
2064 if (T->isObjCObjectPointerType()) {
2065 T = T->getPointeeType();
2066 return T->isObjCQualifiedInterfaceType();
2067 }
2068 if (T->isArrayType()) {
2069 QualType ElemTy = Context->getBaseElementType(T);
2070 return needToScanForQualifiers(ElemTy);
2071 }
2072 return false;
2073 }
2074
2075 void RewriteObjC::RewriteObjCQualifiedInterfaceTypes(Expr *E) {
2076 QualType Type = E->getType();
2077 if (needToScanForQualifiers(Type)) {
2078 SourceLocation Loc, EndLoc;
2079
2080 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E)) {
2081 Loc = ECE->getLParenLoc();
2082 EndLoc = ECE->getRParenLoc();
2083 } else {
2084 Loc = E->getBeginLoc();
2085 EndLoc = E->getEndLoc();
2086 }
2087 // This will defend against trying to rewrite synthesized expressions.
2088 if (Loc.isInvalid() || EndLoc.isInvalid())
2089 return;
2090
2091 const char *startBuf = SM->getCharacterData(Loc);
2092 const char *endBuf = SM->getCharacterData(EndLoc);
2093 const char *startRef = nullptr, *endRef = nullptr;
2094 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2095 // Get the locations of the startRef, endRef.
2096 SourceLocation LessLoc = Loc.getLocWithOffset(startRef-startBuf);
2097 SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-startBuf+1);
2098 // Comment out the protocol references.
2099 InsertText(LessLoc, "/*");
2100 InsertText(GreaterLoc, "*/");
2101 }
2102 }
2103 }
2104
2105 void RewriteObjC::RewriteObjCQualifiedInterfaceTypes(Decl *Dcl) {
2106 SourceLocation Loc;
2107 QualType Type;
2108 const FunctionProtoType *proto = nullptr;
2109 if (VarDecl *VD = dyn_cast<VarDecl>(Dcl)) {
2110 Loc = VD->getLocation();
2111 Type = VD->getType();
2112 }
2113 else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Dcl)) {
2114 Loc = FD->getLocation();
2115 // Check for ObjC 'id' and class types that have been adorned with protocol
2116 // information (id<p>, C<p>*). The protocol references need to be rewritten!
2117 const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2118 assert(funcType && "missing function type");
2119 proto = dyn_cast<FunctionProtoType>(funcType);
2120 if (!proto)
2121 return;
2122 Type = proto->getReturnType();
2123 }
2124 else if (FieldDecl *FD = dyn_cast<FieldDecl>(Dcl)) {
2125 Loc = FD->getLocation();
2126 Type = FD->getType();
2127 }
2128 else
2129 return;
2130
2131 if (needToScanForQualifiers(Type)) {
2132 // Since types are unique, we need to scan the buffer.
2133
2134 const char *endBuf = SM->getCharacterData(Loc);
2135 const char *startBuf = endBuf;
2136 while (*startBuf != ';' && *startBuf != '<' && startBuf != MainFileStart)
2137 startBuf--; // scan backward (from the decl location) for return type.
2138 const char *startRef = nullptr, *endRef = nullptr;
2139 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2140 // Get the locations of the startRef, endRef.
2141 SourceLocation LessLoc = Loc.getLocWithOffset(startRef-endBuf);
2142 SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-endBuf+1);
2143 // Comment out the protocol references.
2144 InsertText(LessLoc, "/*");
2145 InsertText(GreaterLoc, "*/");
2146 }
2147 }
2148 if (!proto)
2149 return; // most likely, was a variable
2150 // Now check arguments.
2151 const char *startBuf = SM->getCharacterData(Loc);
2152 const char *startFuncBuf = startBuf;
2153 for (unsigned i = 0; i < proto->getNumParams(); i++) {
2154 if (needToScanForQualifiers(proto->getParamType(i))) {
2155 // Since types are unique, we need to scan the buffer.
2156
2157 const char *endBuf = startBuf;
2158 // scan forward (from the decl location) for argument types.
2159 scanToNextArgument(endBuf);
2160 const char *startRef = nullptr, *endRef = nullptr;
2161 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2162 // Get the locations of the startRef, endRef.
2163 SourceLocation LessLoc =
2164 Loc.getLocWithOffset(startRef-startFuncBuf);
2165 SourceLocation GreaterLoc =
2166 Loc.getLocWithOffset(endRef-startFuncBuf+1);
2167 // Comment out the protocol references.
2168 InsertText(LessLoc, "/*");
2169 InsertText(GreaterLoc, "*/");
2170 }
2171 startBuf = ++endBuf;
2172 }
2173 else {
2174 // If the function name is derived from a macro expansion, then the
2175 // argument buffer will not follow the name. Need to speak with Chris.
2176 while (*startBuf && *startBuf != ')' && *startBuf != ',')
2177 startBuf++; // scan forward (from the decl location) for argument types.
2178 startBuf++;
2179 }
2180 }
2181 }
2182
2183 void RewriteObjC::RewriteTypeOfDecl(VarDecl *ND) {
2184 QualType QT = ND->getType();
2185 const Type* TypePtr = QT->getAs<Type>();
2186 if (!isa<TypeOfExprType>(TypePtr))
2187 return;
2188 while (isa<TypeOfExprType>(TypePtr)) {
2189 const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
2190 QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
2191 TypePtr = QT->getAs<Type>();
2192 }
2193 // FIXME. This will not work for multiple declarators; as in:
2194 // __typeof__(a) b,c,d;
2195 std::string TypeAsString(QT.getAsString(Context->getPrintingPolicy()));
2196 SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
2197 const char *startBuf = SM->getCharacterData(DeclLoc);
2198 if (ND->getInit()) {
2199 std::string Name(ND->getNameAsString());
2200 TypeAsString += " " + Name + " = ";
2201 Expr *E = ND->getInit();
2202 SourceLocation startLoc;
2203 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
2204 startLoc = ECE->getLParenLoc();
2205 else
2206 startLoc = E->getBeginLoc();
2207 startLoc = SM->getExpansionLoc(startLoc);
2208 const char *endBuf = SM->getCharacterData(startLoc);
2209 ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
2210 }
2211 else {
2212 SourceLocation X = ND->getEndLoc();
2213 X = SM->getExpansionLoc(X);
2214 const char *endBuf = SM->getCharacterData(X);
2215 ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
2216 }
2217 }
2218
2219 // SynthSelGetUidFunctionDecl - SEL sel_registerName(const char *str);
2220 void RewriteObjC::SynthSelGetUidFunctionDecl() {
2221 IdentifierInfo *SelGetUidIdent = &Context->Idents.get("sel_registerName");
2222 SmallVector<QualType, 16> ArgTys;
2223 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2224 QualType getFuncType =
2225 getSimpleFunctionType(Context->getObjCSelType(), ArgTys);
2226 SelGetUidFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2227 SourceLocation(),
2228 SourceLocation(),
2229 SelGetUidIdent, getFuncType,
2230 nullptr, SC_Extern);
2231 }
2232
2233 void RewriteObjC::RewriteFunctionDecl(FunctionDecl *FD) {
2234 // declared in <objc/objc.h>
2235 if (FD->getIdentifier() &&
2236 FD->getName() == "sel_registerName") {
2237 SelGetUidFunctionDecl = FD;
2238 return;
2239 }
2240 RewriteObjCQualifiedInterfaceTypes(FD);
2241 }
2242
2243 void RewriteObjC::RewriteBlockPointerType(std::string& Str, QualType Type) {
2244 std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
2245 const char *argPtr = TypeString.c_str();
2246 if (!strchr(argPtr, '^')) {
2247 Str += TypeString;
2248 return;
2249 }
2250 while (*argPtr) {
2251 Str += (*argPtr == '^' ? '*' : *argPtr);
2252 argPtr++;
2253 }
2254 }
2255
2256 // FIXME. Consolidate this routine with RewriteBlockPointerType.
2257 void RewriteObjC::RewriteBlockPointerTypeVariable(std::string& Str,
2258 ValueDecl *VD) {
2259 QualType Type = VD->getType();
2260 std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
2261 const char *argPtr = TypeString.c_str();
2262 int paren = 0;
2263 while (*argPtr) {
2264 switch (*argPtr) {
2265 case '(':
2266 Str += *argPtr;
2267 paren++;
2268 break;
2269 case ')':
2270 Str += *argPtr;
2271 paren--;
2272 break;
2273 case '^':
2274 Str += '*';
2275 if (paren == 1)
2276 Str += VD->getNameAsString();
2277 break;
2278 default:
2279 Str += *argPtr;
2280 break;
2281 }
2282 argPtr++;
2283 }
2284 }
2285
2286 void RewriteObjC::RewriteBlockLiteralFunctionDecl(FunctionDecl *FD) {
2287 SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
2288 const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2289 const FunctionProtoType *proto = dyn_cast<FunctionProtoType>(funcType);
2290 if (!proto)
2291 return;
2292 QualType Type = proto->getReturnType();
2293 std::string FdStr = Type.getAsString(Context->getPrintingPolicy());
2294 FdStr += " ";
2295 FdStr += FD->getName();
2296 FdStr += "(";
2297 unsigned numArgs = proto->getNumParams();
2298 for (unsigned i = 0; i < numArgs; i++) {
2299 QualType ArgType = proto->getParamType(i);
2300 RewriteBlockPointerType(FdStr, ArgType);
2301 if (i+1 < numArgs)
2302 FdStr += ", ";
2303 }
2304 FdStr += ");\n";
2305 InsertText(FunLocStart, FdStr);
2306 CurFunctionDeclToDeclareForBlock = nullptr;
2307 }
2308
2309 // SynthSuperConstructorFunctionDecl - id objc_super(id obj, id super);
2310 void RewriteObjC::SynthSuperConstructorFunctionDecl() {
2311 if (SuperConstructorFunctionDecl)
2312 return;
2313 IdentifierInfo *msgSendIdent = &Context->Idents.get("__rw_objc_super");
2314 SmallVector<QualType, 16> ArgTys;
2315 QualType argT = Context->getObjCIdType();
2316 assert(!argT.isNull() && "Can't find 'id' type");
2317 ArgTys.push_back(argT);
2318 ArgTys.push_back(argT);
2319 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2320 ArgTys);
2321 SuperConstructorFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2322 SourceLocation(),
2323 SourceLocation(),
2324 msgSendIdent, msgSendType,
2325 nullptr, SC_Extern);
2326 }
2327
2328 // SynthMsgSendFunctionDecl - id objc_msgSend(id self, SEL op, ...);
2329 void RewriteObjC::SynthMsgSendFunctionDecl() {
2330 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend");
2331 SmallVector<QualType, 16> ArgTys;
2332 QualType argT = Context->getObjCIdType();
2333 assert(!argT.isNull() && "Can't find 'id' type");
2334 ArgTys.push_back(argT);
2335 argT = Context->getObjCSelType();
2336 assert(!argT.isNull() && "Can't find 'SEL' type");
2337 ArgTys.push_back(argT);
2338 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2339 ArgTys, /*isVariadic=*/true);
2340 MsgSendFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2341 SourceLocation(),
2342 SourceLocation(),
2343 msgSendIdent, msgSendType,
2344 nullptr, SC_Extern);
2345 }
2346
2347 // SynthMsgSendSuperFunctionDecl - id objc_msgSendSuper(struct objc_super *, SEL op, ...);
2348 void RewriteObjC::SynthMsgSendSuperFunctionDecl() {
2349 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSendSuper");
2350 SmallVector<QualType, 16> ArgTys;
2351 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
2352 SourceLocation(), SourceLocation(),
2353 &Context->Idents.get("objc_super"));
2354 QualType argT = Context->getPointerType(Context->getTagDeclType(RD));
2355 assert(!argT.isNull() && "Can't build 'struct objc_super *' type");
2356 ArgTys.push_back(argT);
2357 argT = Context->getObjCSelType();
2358 assert(!argT.isNull() && "Can't find 'SEL' type");
2359 ArgTys.push_back(argT);
2360 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2361 ArgTys, /*isVariadic=*/true);
2362 MsgSendSuperFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2363 SourceLocation(),
2364 SourceLocation(),
2365 msgSendIdent, msgSendType,
2366 nullptr, SC_Extern);
2367 }
2368
2369 // SynthMsgSendStretFunctionDecl - id objc_msgSend_stret(id self, SEL op, ...);
2370 void RewriteObjC::SynthMsgSendStretFunctionDecl() {
2371 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_stret");
2372 SmallVector<QualType, 16> ArgTys;
2373 QualType argT = Context->getObjCIdType();
2374 assert(!argT.isNull() && "Can't find 'id' type");
2375 ArgTys.push_back(argT);
2376 argT = Context->getObjCSelType();
2377 assert(!argT.isNull() && "Can't find 'SEL' type");
2378 ArgTys.push_back(argT);
2379 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2380 ArgTys, /*isVariadic=*/true);
2381 MsgSendStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2382 SourceLocation(),
2383 SourceLocation(),
2384 msgSendIdent, msgSendType,
2385 nullptr, SC_Extern);
2386 }
2387
2388 // SynthMsgSendSuperStretFunctionDecl -
2389 // id objc_msgSendSuper_stret(struct objc_super *, SEL op, ...);
2390 void RewriteObjC::SynthMsgSendSuperStretFunctionDecl() {
2391 IdentifierInfo *msgSendIdent =
2392 &Context->Idents.get("objc_msgSendSuper_stret");
2393 SmallVector<QualType, 16> ArgTys;
2394 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
2395 SourceLocation(), SourceLocation(),
2396 &Context->Idents.get("objc_super"));
2397 QualType argT = Context->getPointerType(Context->getTagDeclType(RD));
2398 assert(!argT.isNull() && "Can't build 'struct objc_super *' type");
2399 ArgTys.push_back(argT);
2400 argT = Context->getObjCSelType();
2401 assert(!argT.isNull() && "Can't find 'SEL' type");
2402 ArgTys.push_back(argT);
2403 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2404 ArgTys, /*isVariadic=*/true);
2405 MsgSendSuperStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2406 SourceLocation(),
2407 SourceLocation(),
2408 msgSendIdent,
2409 msgSendType, nullptr,
2410 SC_Extern);
2411 }
2412
2413 // SynthMsgSendFpretFunctionDecl - double objc_msgSend_fpret(id self, SEL op, ...);
2414 void RewriteObjC::SynthMsgSendFpretFunctionDecl() {
2415 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_fpret");
2416 SmallVector<QualType, 16> ArgTys;
2417 QualType argT = Context->getObjCIdType();
2418 assert(!argT.isNull() && "Can't find 'id' type");
2419 ArgTys.push_back(argT);
2420 argT = Context->getObjCSelType();
2421 assert(!argT.isNull() && "Can't find 'SEL' type");
2422 ArgTys.push_back(argT);
2423 QualType msgSendType = getSimpleFunctionType(Context->DoubleTy,
2424 ArgTys, /*isVariadic=*/true);
2425 MsgSendFpretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2426 SourceLocation(),
2427 SourceLocation(),
2428 msgSendIdent, msgSendType,
2429 nullptr, SC_Extern);
2430 }
2431
2432 // SynthGetClassFunctionDecl - id objc_getClass(const char *name);
2433 void RewriteObjC::SynthGetClassFunctionDecl() {
2434 IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getClass");
2435 SmallVector<QualType, 16> ArgTys;
2436 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2437 QualType getClassType = getSimpleFunctionType(Context->getObjCIdType(),
2438 ArgTys);
2439 GetClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2440 SourceLocation(),
2441 SourceLocation(),
2442 getClassIdent, getClassType,
2443 nullptr, SC_Extern);
2444 }
2445
2446 // SynthGetSuperClassFunctionDecl - Class class_getSuperclass(Class cls);
2447 void RewriteObjC::SynthGetSuperClassFunctionDecl() {
2448 IdentifierInfo *getSuperClassIdent =
2449 &Context->Idents.get("class_getSuperclass");
2450 SmallVector<QualType, 16> ArgTys;
2451 ArgTys.push_back(Context->getObjCClassType());
2452 QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
2453 ArgTys);
2454 GetSuperClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2455 SourceLocation(),
2456 SourceLocation(),
2457 getSuperClassIdent,
2458 getClassType, nullptr,
2459 SC_Extern);
2460 }
2461
2462 // SynthGetMetaClassFunctionDecl - id objc_getMetaClass(const char *name);
2463 void RewriteObjC::SynthGetMetaClassFunctionDecl() {
2464 IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getMetaClass");
2465 SmallVector<QualType, 16> ArgTys;
2466 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2467 QualType getClassType = getSimpleFunctionType(Context->getObjCIdType(),
2468 ArgTys);
2469 GetMetaClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2470 SourceLocation(),
2471 SourceLocation(),
2472 getClassIdent, getClassType,
2473 nullptr, SC_Extern);
2474 }
2475
2476 Stmt *RewriteObjC::RewriteObjCStringLiteral(ObjCStringLiteral *Exp) {
2477 assert(Exp != nullptr && "Expected non-null ObjCStringLiteral");
2478 QualType strType = getConstantStringStructType();
2479
2480 std::string S = "__NSConstantStringImpl_";
2481
2482 std::string tmpName = InFileName;
2483 unsigned i;
2484 for (i=0; i < tmpName.length(); i++) {
2485 char c = tmpName.at(i);
2486 // replace any non-alphanumeric characters with '_'.
2487 if (!isAlphanumeric(c))
2488 tmpName[i] = '_';
2489 }
2490 S += tmpName;
2491 S += "_";
2492 S += utostr(NumObjCStringLiterals++);
2493
2494 Preamble += "static __NSConstantStringImpl " + S;
2495 Preamble += " __attribute__ ((section (\"__DATA, __cfstring\"))) = {__CFConstantStringClassReference,";
2496 Preamble += "0x000007c8,"; // utf8_str
2497 // The pretty printer for StringLiteral handles escape characters properly.
2498 std::string prettyBufS;
2499 llvm::raw_string_ostream prettyBuf(prettyBufS);
2500 Exp->getString()->printPretty(prettyBuf, nullptr, PrintingPolicy(LangOpts));
2501 Preamble += prettyBuf.str();
2502 Preamble += ",";
2503 Preamble += utostr(Exp->getString()->getByteLength()) + "};\n";
2504
2505 VarDecl *NewVD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
2506 SourceLocation(), &Context->Idents.get(S),
2507 strType, nullptr, SC_Static);
2508 DeclRefExpr *DRE = new (Context)
2509 DeclRefExpr(*Context, NewVD, false, strType, VK_LValue, SourceLocation());
2510 Expr *Unop = new (Context)
2511 UnaryOperator(DRE, UO_AddrOf, Context->getPointerType(DRE->getType()),
2512 VK_RValue, OK_Ordinary, SourceLocation(), false);
2513 // cast to NSConstantString *
2514 CastExpr *cast = NoTypeInfoCStyleCastExpr(Context, Exp->getType(),
2515 CK_CPointerToObjCPointerCast, Unop);
2516 ReplaceStmt(Exp, cast);
2517 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2518 return cast;
2519 }
2520
2521 // struct objc_super { struct objc_object *receiver; struct objc_class *super; };
2522 QualType RewriteObjC::getSuperStructType() {
2523 if (!SuperStructDecl) {
2524 SuperStructDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
2525 SourceLocation(), SourceLocation(),
2526 &Context->Idents.get("objc_super"));
2527 QualType FieldTypes[2];
2528
2529 // struct objc_object *receiver;
2530 FieldTypes[0] = Context->getObjCIdType();
2531 // struct objc_class *super;
2532 FieldTypes[1] = Context->getObjCClassType();
2533
2534 // Create fields
2535 for (unsigned i = 0; i < 2; ++i) {
2536 SuperStructDecl->addDecl(FieldDecl::Create(*Context, SuperStructDecl,
2537 SourceLocation(),
2538 SourceLocation(), nullptr,
2539 FieldTypes[i], nullptr,
2540 /*BitWidth=*/nullptr,
2541 /*Mutable=*/false,
2542 ICIS_NoInit));
2543 }
2544
2545 SuperStructDecl->completeDefinition();
2546 }
2547 return Context->getTagDeclType(SuperStructDecl);
2548 }
2549
2550 QualType RewriteObjC::getConstantStringStructType() {
2551 if (!ConstantStringDecl) {
2552 ConstantStringDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
2553 SourceLocation(), SourceLocation(),
2554 &Context->Idents.get("__NSConstantStringImpl"));
2555 QualType FieldTypes[4];
2556
2557 // struct objc_object *receiver;
2558 FieldTypes[0] = Context->getObjCIdType();
2559 // int flags;
2560 FieldTypes[1] = Context->IntTy;
2561 // char *str;
2562 FieldTypes[2] = Context->getPointerType(Context->CharTy);
2563 // long length;
2564 FieldTypes[3] = Context->LongTy;
2565
2566 // Create fields
2567 for (unsigned i = 0; i < 4; ++i) {
2568 ConstantStringDecl->addDecl(FieldDecl::Create(*Context,
2569 ConstantStringDecl,
2570 SourceLocation(),
2571 SourceLocation(), nullptr,
2572 FieldTypes[i], nullptr,
2573 /*BitWidth=*/nullptr,
2574 /*Mutable=*/true,
2575 ICIS_NoInit));
2576 }
2577
2578 ConstantStringDecl->completeDefinition();
2579 }
2580 return Context->getTagDeclType(ConstantStringDecl);
2581 }
2582
2583 CallExpr *RewriteObjC::SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
2584 QualType msgSendType,
2585 QualType returnType,
2586 SmallVectorImpl<QualType> &ArgTypes,
2587 SmallVectorImpl<Expr*> &MsgExprs,
2588 ObjCMethodDecl *Method) {
2589 // Create a reference to the objc_msgSend_stret() declaration.
2590 DeclRefExpr *STDRE =
2591 new (Context) DeclRefExpr(*Context, MsgSendStretFlavor, false,
2592 msgSendType, VK_LValue, SourceLocation());
2593 // Need to cast objc_msgSend_stret to "void *" (see above comment).
2594 CastExpr *cast = NoTypeInfoCStyleCastExpr(Context,
2595 Context->getPointerType(Context->VoidTy),
2596 CK_BitCast, STDRE);
2597 // Now do the "normal" pointer to function cast.
2598 QualType castType = getSimpleFunctionType(returnType, ArgTypes,
2599 Method ? Method->isVariadic()
2600 : false);
2601 castType = Context->getPointerType(castType);
2602 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2603 cast);
2604
2605 // Don't forget the parens to enforce the proper binding.
2606 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), cast);
2607
2608 const FunctionType *FT = msgSendType->getAs<FunctionType>();
2609 CallExpr *STCE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
2610 VK_RValue, SourceLocation());
2611 return STCE;
2612 }
2613
2614 Stmt *RewriteObjC::SynthMessageExpr(ObjCMessageExpr *Exp,
2615 SourceLocation StartLoc,
2616 SourceLocation EndLoc) {
2617 if (!SelGetUidFunctionDecl)
2618 SynthSelGetUidFunctionDecl();
2619 if (!MsgSendFunctionDecl)
2620 SynthMsgSendFunctionDecl();
2621 if (!MsgSendSuperFunctionDecl)
2622 SynthMsgSendSuperFunctionDecl();
2623 if (!MsgSendStretFunctionDecl)
2624 SynthMsgSendStretFunctionDecl();
2625 if (!MsgSendSuperStretFunctionDecl)
2626 SynthMsgSendSuperStretFunctionDecl();
2627 if (!MsgSendFpretFunctionDecl)
2628 SynthMsgSendFpretFunctionDecl();
2629 if (!GetClassFunctionDecl)
2630 SynthGetClassFunctionDecl();
2631 if (!GetSuperClassFunctionDecl)
2632 SynthGetSuperClassFunctionDecl();
2633 if (!GetMetaClassFunctionDecl)
2634 SynthGetMetaClassFunctionDecl();
2635
2636 // default to objc_msgSend().
2637 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2638 // May need to use objc_msgSend_stret() as well.
2639 FunctionDecl *MsgSendStretFlavor = nullptr;
2640 if (ObjCMethodDecl *mDecl = Exp->getMethodDecl()) {
2641 QualType resultType = mDecl->getReturnType();
2642 if (resultType->isRecordType())
2643 MsgSendStretFlavor = MsgSendStretFunctionDecl;
2644 else if (resultType->isRealFloatingType())
2645 MsgSendFlavor = MsgSendFpretFunctionDecl;
2646 }
2647
2648 // Synthesize a call to objc_msgSend().
2649 SmallVector<Expr*, 8> MsgExprs;
2650 switch (Exp->getReceiverKind()) {
2651 case ObjCMessageExpr::SuperClass: {
2652 MsgSendFlavor = MsgSendSuperFunctionDecl;
2653 if (MsgSendStretFlavor)
2654 MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
2655 assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
2656
2657 ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
2658
2659 SmallVector<Expr*, 4> InitExprs;
2660
2661 // set the receiver to self, the first argument to all methods.
2662 InitExprs.push_back(
2663 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
2664 CK_BitCast,
2665 new (Context) DeclRefExpr(*Context,
2666 CurMethodDef->getSelfDecl(),
2667 false,
2668 Context->getObjCIdType(),
2669 VK_RValue,
2670 SourceLocation()))
2671 ); // set the 'receiver'.
2672
2673 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
2674 SmallVector<Expr*, 8> ClsExprs;
2675 ClsExprs.push_back(getStringLiteral(ClassDecl->getIdentifier()->getName()));
2676 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetMetaClassFunctionDecl,
2677 ClsExprs, StartLoc, EndLoc);
2678 // (Class)objc_getClass("CurrentClass")
2679 CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
2680 Context->getObjCClassType(),
2681 CK_BitCast, Cls);
2682 ClsExprs.clear();
2683 ClsExprs.push_back(ArgExpr);
2684 Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl, ClsExprs,
2685 StartLoc, EndLoc);
2686 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
2687 // To turn off a warning, type-cast to 'id'
2688 InitExprs.push_back( // set 'super class', using class_getSuperclass().
2689 NoTypeInfoCStyleCastExpr(Context,
2690 Context->getObjCIdType(),
2691 CK_BitCast, Cls));
2692 // struct objc_super
2693 QualType superType = getSuperStructType();
2694 Expr *SuperRep;
2695
2696 if (LangOpts.MicrosoftExt) {
2697 SynthSuperConstructorFunctionDecl();
2698 // Simulate a constructor call...
2699 DeclRefExpr *DRE = new (Context)
2700 DeclRefExpr(*Context, SuperConstructorFunctionDecl, false, superType,
2701 VK_LValue, SourceLocation());
2702 SuperRep = CallExpr::Create(*Context, DRE, InitExprs, superType,
2703 VK_LValue, SourceLocation());
2704 // The code for super is a little tricky to prevent collision with
2705 // the structure definition in the header. The rewriter has it's own
2706 // internal definition (__rw_objc_super) that is uses. This is why
2707 // we need the cast below. For example:
2708 // (struct objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
2709 //
2710 SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
2711 Context->getPointerType(SuperRep->getType()),
2712 VK_RValue, OK_Ordinary,
2713 SourceLocation(), false);
2714 SuperRep = NoTypeInfoCStyleCastExpr(Context,
2715 Context->getPointerType(superType),
2716 CK_BitCast, SuperRep);
2717 } else {
2718 // (struct objc_super) { <exprs from above> }
2719 InitListExpr *ILE =
2720 new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
2721 SourceLocation());
2722 TypeSourceInfo *superTInfo
2723 = Context->getTrivialTypeSourceInfo(superType);
2724 SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
2725 superType, VK_LValue,
2726 ILE, false);
2727 // struct objc_super *
2728 SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
2729 Context->getPointerType(SuperRep->getType()),
2730 VK_RValue, OK_Ordinary,
2731 SourceLocation(), false);
2732 }
2733 MsgExprs.push_back(SuperRep);
2734 break;
2735 }
2736
2737 case ObjCMessageExpr::Class: {
2738 SmallVector<Expr*, 8> ClsExprs;
2739 ObjCInterfaceDecl *Class
2740 = Exp->getClassReceiver()->getAs<ObjCObjectType>()->getInterface();
2741 IdentifierInfo *clsName = Class->getIdentifier();
2742 ClsExprs.push_back(getStringLiteral(clsName->getName()));
2743 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
2744 StartLoc, EndLoc);
2745 MsgExprs.push_back(Cls);
2746 break;
2747 }
2748
2749 case ObjCMessageExpr::SuperInstance:{
2750 MsgSendFlavor = MsgSendSuperFunctionDecl;
2751 if (MsgSendStretFlavor)
2752 MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
2753 assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
2754 ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
2755 SmallVector<Expr*, 4> InitExprs;
2756
2757 InitExprs.push_back(
2758 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
2759 CK_BitCast,
2760 new (Context) DeclRefExpr(*Context,
2761 CurMethodDef->getSelfDecl(),
2762 false,
2763 Context->getObjCIdType(),
2764 VK_RValue, SourceLocation()))
2765 ); // set the 'receiver'.
2766
2767 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
2768 SmallVector<Expr*, 8> ClsExprs;
2769 ClsExprs.push_back(getStringLiteral(ClassDecl->getIdentifier()->getName()));
2770 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
2771 StartLoc, EndLoc);
2772 // (Class)objc_getClass("CurrentClass")
2773 CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
2774 Context->getObjCClassType(),
2775 CK_BitCast, Cls);
2776 ClsExprs.clear();
2777 ClsExprs.push_back(ArgExpr);
2778 Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl, ClsExprs,
2779 StartLoc, EndLoc);
2780
2781 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
2782 // To turn off a warning, type-cast to 'id'
2783 InitExprs.push_back(
2784 // set 'super class', using class_getSuperclass().
2785 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
2786 CK_BitCast, Cls));
2787 // struct objc_super
2788 QualType superType = getSuperStructType();
2789 Expr *SuperRep;
2790
2791 if (LangOpts.MicrosoftExt) {
2792 SynthSuperConstructorFunctionDecl();
2793 // Simulate a constructor call...
2794 DeclRefExpr *DRE = new (Context)
2795 DeclRefExpr(*Context, SuperConstructorFunctionDecl, false, superType,
2796 VK_LValue, SourceLocation());
2797 SuperRep = CallExpr::Create(*Context, DRE, InitExprs, superType,
2798 VK_LValue, SourceLocation());
2799 // The code for super is a little tricky to prevent collision with
2800 // the structure definition in the header. The rewriter has it's own
2801 // internal definition (__rw_objc_super) that is uses. This is why
2802 // we need the cast below. For example:
2803 // (struct objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
2804 //
2805 SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
2806 Context->getPointerType(SuperRep->getType()),
2807 VK_RValue, OK_Ordinary,
2808 SourceLocation(), false);
2809 SuperRep = NoTypeInfoCStyleCastExpr(Context,
2810 Context->getPointerType(superType),
2811 CK_BitCast, SuperRep);
2812 } else {
2813 // (struct objc_super) { <exprs from above> }
2814 InitListExpr *ILE =
2815 new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
2816 SourceLocation());
2817 TypeSourceInfo *superTInfo
2818 = Context->getTrivialTypeSourceInfo(superType);
2819 SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
2820 superType, VK_RValue, ILE,
2821 false);
2822 }
2823 MsgExprs.push_back(SuperRep);
2824 break;
2825 }
2826
2827 case ObjCMessageExpr::Instance: {
2828 // Remove all type-casts because it may contain objc-style types; e.g.
2829 // Foo<Proto> *.
2830 Expr *recExpr = Exp->getInstanceReceiver();
2831 while (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(recExpr))
2832 recExpr = CE->getSubExpr();
2833 CastKind CK = recExpr->getType()->isObjCObjectPointerType()
2834 ? CK_BitCast : recExpr->getType()->isBlockPointerType()
2835 ? CK_BlockPointerToObjCPointerCast
2836 : CK_CPointerToObjCPointerCast;
2837
2838 recExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
2839 CK, recExpr);
2840 MsgExprs.push_back(recExpr);
2841 break;
2842 }
2843 }
2844
2845 // Create a call to sel_registerName("selName"), it will be the 2nd argument.
2846 SmallVector<Expr*, 8> SelExprs;
2847 SelExprs.push_back(getStringLiteral(Exp->getSelector().getAsString()));
2848 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2849 SelExprs, StartLoc, EndLoc);
2850 MsgExprs.push_back(SelExp);
2851
2852 // Now push any user supplied arguments.
2853 for (unsigned i = 0; i < Exp->getNumArgs(); i++) {
2854 Expr *userExpr = Exp->getArg(i);
2855 // Make all implicit casts explicit...ICE comes in handy:-)
2856 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(userExpr)) {
2857 // Reuse the ICE type, it is exactly what the doctor ordered.
2858 QualType type = ICE->getType();
2859 if (needToScanForQualifiers(type))
2860 type = Context->getObjCIdType();
2861 // Make sure we convert "type (^)(...)" to "type (*)(...)".
2862 (void)convertBlockPointerToFunctionPointer(type);
2863 const Expr *SubExpr = ICE->IgnoreParenImpCasts();
2864 CastKind CK;
2865 if (SubExpr->getType()->isIntegralType(*Context) &&
2866 type->isBooleanType()) {
2867 CK = CK_IntegralToBoolean;
2868 } else if (type->isObjCObjectPointerType()) {
2869 if (SubExpr->getType()->isBlockPointerType()) {
2870 CK = CK_BlockPointerToObjCPointerCast;
2871 } else if (SubExpr->getType()->isPointerType()) {
2872 CK = CK_CPointerToObjCPointerCast;
2873 } else {
2874 CK = CK_BitCast;
2875 }
2876 } else {
2877 CK = CK_BitCast;
2878 }
2879
2880 userExpr = NoTypeInfoCStyleCastExpr(Context, type, CK, userExpr);
2881 }
2882 // Make id<P...> cast into an 'id' cast.
2883 else if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(userExpr)) {
2884 if (CE->getType()->isObjCQualifiedIdType()) {
2885 while ((CE = dyn_cast<CStyleCastExpr>(userExpr)))
2886 userExpr = CE->getSubExpr();
2887 CastKind CK;
2888 if (userExpr->getType()->isIntegralType(*Context)) {
2889 CK = CK_IntegralToPointer;
2890 } else if (userExpr->getType()->isBlockPointerType()) {
2891 CK = CK_BlockPointerToObjCPointerCast;
2892 } else if (userExpr->getType()->isPointerType()) {
2893 CK = CK_CPointerToObjCPointerCast;
2894 } else {
2895 CK = CK_BitCast;
2896 }
2897 userExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
2898 CK, userExpr);
2899 }
2900 }
2901 MsgExprs.push_back(userExpr);
2902 // We've transferred the ownership to MsgExprs. For now, we *don't* null
2903 // out the argument in the original expression (since we aren't deleting
2904 // the ObjCMessageExpr). See RewritePropertyOrImplicitSetter() usage for more info.
2905 //Exp->setArg(i, 0);
2906 }
2907 // Generate the funky cast.
2908 CastExpr *cast;
2909 SmallVector<QualType, 8> ArgTypes;
2910 QualType returnType;
2911
2912 // Push 'id' and 'SEL', the 2 implicit arguments.
2913 if (MsgSendFlavor == MsgSendSuperFunctionDecl)
2914 ArgTypes.push_back(Context->getPointerType(getSuperStructType()));
2915 else
2916 ArgTypes.push_back(Context->getObjCIdType());
2917 ArgTypes.push_back(Context->getObjCSelType());
2918 if (ObjCMethodDecl *OMD = Exp->getMethodDecl()) {
2919 // Push any user argument types.
2920 for (const auto *PI : OMD->parameters()) {
2921 QualType t = PI->getType()->isObjCQualifiedIdType()
2922 ? Context->getObjCIdType()
2923 : PI->getType();
2924 // Make sure we convert "t (^)(...)" to "t (*)(...)".
2925 (void)convertBlockPointerToFunctionPointer(t);
2926 ArgTypes.push_back(t);
2927 }
2928 returnType = Exp->getType();
2929 convertToUnqualifiedObjCType(returnType);
2930 (void)convertBlockPointerToFunctionPointer(returnType);
2931 } else {
2932 returnType = Context->getObjCIdType();
2933 }
2934 // Get the type, we will need to reference it in a couple spots.
2935 QualType msgSendType = MsgSendFlavor->getType();
2936
2937 // Create a reference to the objc_msgSend() declaration.
2938 DeclRefExpr *DRE = new (Context) DeclRefExpr(
2939 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2940
2941 // Need to cast objc_msgSend to "void *" (to workaround a GCC bandaid).
2942 // If we don't do this cast, we get the following bizarre warning/note:
2943 // xx.m:13: warning: function called through a non-compatible type
2944 // xx.m:13: note: if this code is reached, the program will abort
2945 cast = NoTypeInfoCStyleCastExpr(Context,
2946 Context->getPointerType(Context->VoidTy),
2947 CK_BitCast, DRE);
2948
2949 // Now do the "normal" pointer to function cast.
2950 // If we don't have a method decl, force a variadic cast.
2951 const ObjCMethodDecl *MD = Exp->getMethodDecl();
2952 QualType castType =
2953 getSimpleFunctionType(returnType, ArgTypes, MD ? MD->isVariadic() : true);
2954 castType = Context->getPointerType(castType);
2955 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2956 cast);
2957
2958 // Don't forget the parens to enforce the proper binding.
2959 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2960
2961 const FunctionType *FT = msgSendType->getAs<FunctionType>();
2962 CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
2963 VK_RValue, EndLoc);
2964 Stmt *ReplacingStmt = CE;
2965 if (MsgSendStretFlavor) {
2966 // We have the method which returns a struct/union. Must also generate
2967 // call to objc_msgSend_stret and hang both varieties on a conditional
2968 // expression which dictate which one to envoke depending on size of
2969 // method's return type.
2970
2971 CallExpr *STCE = SynthMsgSendStretCallExpr(MsgSendStretFlavor,
2972 msgSendType, returnType,
2973 ArgTypes, MsgExprs,
2974 Exp->getMethodDecl());
2975
2976 // Build sizeof(returnType)
2977 UnaryExprOrTypeTraitExpr *sizeofExpr =
2978 new (Context) UnaryExprOrTypeTraitExpr(UETT_SizeOf,
2979 Context->getTrivialTypeSourceInfo(returnType),
2980 Context->getSizeType(), SourceLocation(),
2981 SourceLocation());
2982 // (sizeof(returnType) <= 8 ? objc_msgSend(...) : objc_msgSend_stret(...))
2983 // FIXME: Value of 8 is base on ppc32/x86 ABI for the most common cases.
2984 // For X86 it is more complicated and some kind of target specific routine
2985 // is needed to decide what to do.
2986 unsigned IntSize =
2987 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
2988 IntegerLiteral *limit = IntegerLiteral::Create(*Context,
2989 llvm::APInt(IntSize, 8),
2990 Context->IntTy,
2991 SourceLocation());
2992 BinaryOperator *lessThanExpr =
2993 new (Context) BinaryOperator(sizeofExpr, limit, BO_LE, Context->IntTy,
2994 VK_RValue, OK_Ordinary, SourceLocation(),
2995 FPOptions());
2996 // (sizeof(returnType) <= 8 ? objc_msgSend(...) : objc_msgSend_stret(...))
2997 ConditionalOperator *CondExpr =
2998 new (Context) ConditionalOperator(lessThanExpr,
2999 SourceLocation(), CE,
3000 SourceLocation(), STCE,
3001 returnType, VK_RValue, OK_Ordinary);
3002 ReplacingStmt = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
3003 CondExpr);
3004 }
3005 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3006 return ReplacingStmt;
3007 }
3008
3009 Stmt *RewriteObjC::RewriteMessageExpr(ObjCMessageExpr *Exp) {
3010 Stmt *ReplacingStmt =
3011 SynthMessageExpr(Exp, Exp->getBeginLoc(), Exp->getEndLoc());
3012
3013 // Now do the actual rewrite.
3014 ReplaceStmt(Exp, ReplacingStmt);
3015
3016 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3017 return ReplacingStmt;
3018 }
3019
3020 // typedef struct objc_object Protocol;
3021 QualType RewriteObjC::getProtocolType() {
3022 if (!ProtocolTypeDecl) {
3023 TypeSourceInfo *TInfo
3024 = Context->getTrivialTypeSourceInfo(Context->getObjCIdType());
3025 ProtocolTypeDecl = TypedefDecl::Create(*Context, TUDecl,
3026 SourceLocation(), SourceLocation(),
3027 &Context->Idents.get("Protocol"),
3028 TInfo);
3029 }
3030 return Context->getTypeDeclType(ProtocolTypeDecl);
3031 }
3032
3033 /// RewriteObjCProtocolExpr - Rewrite a protocol expression into
3034 /// a synthesized/forward data reference (to the protocol's metadata).
3035 /// The forward references (and metadata) are generated in
3036 /// RewriteObjC::HandleTranslationUnit().
3037 Stmt *RewriteObjC::RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp) {
3038 std::string Name = "_OBJC_PROTOCOL_" + Exp->getProtocol()->getNameAsString();
3039 IdentifierInfo *ID = &Context->Idents.get(Name);
3040 VarDecl *VD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
3041 SourceLocation(), ID, getProtocolType(),
3042 nullptr, SC_Extern);
3043 DeclRefExpr *DRE = new (Context) DeclRefExpr(
3044 *Context, VD, false, getProtocolType(), VK_LValue, SourceLocation());
3045 Expr *DerefExpr = new (Context) UnaryOperator(DRE, UO_AddrOf,
3046 Context->getPointerType(DRE->getType()),
3047 VK_RValue, OK_Ordinary, SourceLocation(), false);
3048 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, DerefExpr->getType(),
3049 CK_BitCast,
3050 DerefExpr);
3051 ReplaceStmt(Exp, castExpr);
3052 ProtocolExprDecls.insert(Exp->getProtocol()->getCanonicalDecl());
3053 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3054 return castExpr;
3055 }
3056
3057 bool RewriteObjC::BufferContainsPPDirectives(const char *startBuf,
3058 const char *endBuf) {
3059 while (startBuf < endBuf) {
3060 if (*startBuf == '#') {
3061 // Skip whitespace.
3062 for (++startBuf; startBuf[0] == ' ' || startBuf[0] == '\t'; ++startBuf)
3063 ;
3064 if (!strncmp(startBuf, "if", strlen("if")) ||
3065 !strncmp(startBuf, "ifdef", strlen("ifdef")) ||
3066 !strncmp(startBuf, "ifndef", strlen("ifndef")) ||
3067 !strncmp(startBuf, "define", strlen("define")) ||
3068 !strncmp(startBuf, "undef", strlen("undef")) ||
3069 !strncmp(startBuf, "else", strlen("else")) ||
3070 !strncmp(startBuf, "elif", strlen("elif")) ||
3071 !strncmp(startBuf, "endif", strlen("endif")) ||
3072 !strncmp(startBuf, "pragma", strlen("pragma")) ||
3073 !strncmp(startBuf, "include", strlen("include")) ||
3074 !strncmp(startBuf, "import", strlen("import")) ||
3075 !strncmp(startBuf, "include_next", strlen("include_next")))
3076 return true;
3077 }
3078 startBuf++;
3079 }
3080 return false;
3081 }
3082
3083 /// RewriteObjCInternalStruct - Rewrite one internal struct corresponding to
3084 /// an objective-c class with ivars.
3085 void RewriteObjC::RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
3086 std::string &Result) {
3087 assert(CDecl && "Class missing in SynthesizeObjCInternalStruct");
3088 assert(CDecl->getName() != "" &&
3089 "Name missing in SynthesizeObjCInternalStruct");
3090 // Do not synthesize more than once.
3091 if (ObjCSynthesizedStructs.count(CDecl))
3092 return;
3093 ObjCInterfaceDecl *RCDecl = CDecl->getSuperClass();
3094 int NumIvars = CDecl->ivar_size();
3095 SourceLocation LocStart = CDecl->getBeginLoc();
3096 SourceLocation LocEnd = CDecl->getEndOfDefinitionLoc();
3097
3098 const char *startBuf = SM->getCharacterData(LocStart);
3099 const char *endBuf = SM->getCharacterData(LocEnd);
3100
3101 // If no ivars and no root or if its root, directly or indirectly,
3102 // have no ivars (thus not synthesized) then no need to synthesize this class.
3103 if ((!CDecl->isThisDeclarationADefinition() || NumIvars == 0) &&
3104 (!RCDecl || !ObjCSynthesizedStructs.count(RCDecl))) {
3105 endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
3106 ReplaceText(LocStart, endBuf-startBuf, Result);
3107 return;
3108 }
3109
3110 // FIXME: This has potential of causing problem. If
3111 // SynthesizeObjCInternalStruct is ever called recursively.
3112 Result += "\nstruct ";
3113 Result += CDecl->getNameAsString();
3114 if (LangOpts.MicrosoftExt)
3115 Result += "_IMPL";
3116
3117 if (NumIvars > 0) {
3118 const char *cursor = strchr(startBuf, '{');
3119 assert((cursor && endBuf)
3120 && "SynthesizeObjCInternalStruct - malformed @interface");
3121 // If the buffer contains preprocessor directives, we do more fine-grained
3122 // rewrites. This is intended to fix code that looks like (which occurs in
3123 // NSURL.h, for example):
3124 //
3125 // #ifdef XYZ
3126 // @interface Foo : NSObject
3127 // #else
3128 // @interface FooBar : NSObject
3129 // #endif
3130 // {
3131 // int i;
3132 // }
3133 // @end
3134 //
3135 // This clause is segregated to avoid breaking the common case.
3136 if (BufferContainsPPDirectives(startBuf, cursor)) {
3137 SourceLocation L = RCDecl ? CDecl->getSuperClassLoc() :
3138 CDecl->getAtStartLoc();
3139 const char *endHeader = SM->getCharacterData(L);
3140 endHeader += Lexer::MeasureTokenLength(L, *SM, LangOpts);
3141
3142 if (CDecl->protocol_begin() != CDecl->protocol_end()) {
3143 // advance to the end of the referenced protocols.
3144 while (endHeader < cursor && *endHeader != '>') endHeader++;
3145 endHeader++;
3146 }
3147 // rewrite the original header
3148 ReplaceText(LocStart, endHeader-startBuf, Result);
3149 } else {
3150 // rewrite the original header *without* disturbing the '{'
3151 ReplaceText(LocStart, cursor-startBuf, Result);
3152 }
3153 if (RCDecl && ObjCSynthesizedStructs.count(RCDecl)) {
3154 Result = "\n struct ";
3155 Result += RCDecl->getNameAsString();
3156 Result += "_IMPL ";
3157 Result += RCDecl->getNameAsString();
3158 Result += "_IVARS;\n";
3159
3160 // insert the super class structure definition.
3161 SourceLocation OnePastCurly =
3162 LocStart.getLocWithOffset(cursor-startBuf+1);
3163 InsertText(OnePastCurly, Result);
3164 }
3165 cursor++; // past '{'
3166
3167 // Now comment out any visibility specifiers.
3168 while (cursor < endBuf) {
3169 if (*cursor == '@') {
3170 SourceLocation atLoc = LocStart.getLocWithOffset(cursor-startBuf);
3171 // Skip whitespace.
3172 for (++cursor; cursor[0] == ' ' || cursor[0] == '\t'; ++cursor)
3173 /*scan*/;
3174
3175 // FIXME: presence of @public, etc. inside comment results in
3176 // this transformation as well, which is still correct c-code.
3177 if (!strncmp(cursor, "public", strlen("public")) ||
3178 !strncmp(cursor, "private", strlen("private")) ||
3179 !strncmp(cursor, "package", strlen("package")) ||
3180 !strncmp(cursor, "protected", strlen("protected")))
3181 InsertText(atLoc, "// ");
3182 }
3183 // FIXME: If there are cases where '<' is used in ivar declaration part
3184 // of user code, then scan the ivar list and use needToScanForQualifiers
3185 // for type checking.
3186 else if (*cursor == '<') {
3187 SourceLocation atLoc = LocStart.getLocWithOffset(cursor-startBuf);
3188 InsertText(atLoc, "/* ");
3189 cursor = strchr(cursor, '>');
3190 cursor++;
3191 atLoc = LocStart.getLocWithOffset(cursor-startBuf);
3192 InsertText(atLoc, " */");
3193 } else if (*cursor == '^') { // rewrite block specifier.
3194 SourceLocation caretLoc = LocStart.getLocWithOffset(cursor-startBuf);
3195 ReplaceText(caretLoc, 1, "*");
3196 }
3197 cursor++;
3198 }
3199 // Don't forget to add a ';'!!
3200 InsertText(LocEnd.getLocWithOffset(1), ";");
3201 } else { // we don't have any instance variables - insert super struct.
3202 endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
3203 Result += " {\n struct ";
3204 Result += RCDecl->getNameAsString();
3205 Result += "_IMPL ";
3206 Result += RCDecl->getNameAsString();
3207 Result += "_IVARS;\n};\n";
3208 ReplaceText(LocStart, endBuf-startBuf, Result);
3209 }
3210 // Mark this struct as having been generated.
3211 if (!ObjCSynthesizedStructs.insert(CDecl).second)
3212 llvm_unreachable("struct already synthesize- SynthesizeObjCInternalStruct");
3213 }
3214
3215 //===----------------------------------------------------------------------===//
3216 // Meta Data Emission
3217 //===----------------------------------------------------------------------===//
3218
3219 /// RewriteImplementations - This routine rewrites all method implementations
3220 /// and emits meta-data.
3221
3222 void RewriteObjC::RewriteImplementations() {
3223 int ClsDefCount = ClassImplementation.size();
3224 int CatDefCount = CategoryImplementation.size();
3225
3226 // Rewrite implemented methods
3227 for (int i = 0; i < ClsDefCount; i++)
3228 RewriteImplementationDecl(ClassImplementation[i]);
3229
3230 for (int i = 0; i < CatDefCount; i++)
3231 RewriteImplementationDecl(CategoryImplementation[i]);
3232 }
3233
3234 void RewriteObjC::RewriteByRefString(std::string &ResultStr,
3235 const std::string &Name,
3236 ValueDecl *VD, bool def) {
3237 assert(BlockByRefDeclNo.count(VD) &&
3238 "RewriteByRefString: ByRef decl missing");
3239 if (def)
3240 ResultStr += "struct ";
3241 ResultStr += "__Block_byref_" + Name +
3242 "_" + utostr(BlockByRefDeclNo[VD]) ;
3243 }
3244
3245 static bool HasLocalVariableExternalStorage(ValueDecl *VD) {
3246 if (VarDecl *Var = dyn_cast<VarDecl>(VD))
3247 return (Var->isFunctionOrMethodVarDecl() && !Var->hasLocalStorage());
3248 return false;
3249 }
3250
3251 std::string RewriteObjC::SynthesizeBlockFunc(BlockExpr *CE, int i,
3252 StringRef funcName,
3253 std::string Tag) {
3254 const FunctionType *AFT = CE->getFunctionType();
3255 QualType RT = AFT->getReturnType();
3256 std::string StructRef = "struct " + Tag;
3257 std::string S = "static " + RT.getAsString(Context->getPrintingPolicy()) + " __" +
3258 funcName.str() + "_" + "block_func_" + utostr(i);
3259
3260 BlockDecl *BD = CE->getBlockDecl();
3261
3262 if (isa<FunctionNoProtoType>(AFT)) {
3263 // No user-supplied arguments. Still need to pass in a pointer to the
3264 // block (to reference imported block decl refs).
3265 S += "(" + StructRef + " *__cself)";
3266 } else if (BD->param_empty()) {
3267 S += "(" + StructRef + " *__cself)";
3268 } else {
3269 const FunctionProtoType *FT = cast<FunctionProtoType>(AFT);
3270 assert(FT && "SynthesizeBlockFunc: No function proto");
3271 S += '(';
3272 // first add the implicit argument.
3273 S += StructRef + " *__cself, ";
3274 std::string ParamStr;
3275 for (BlockDecl::param_iterator AI = BD->param_begin(),
3276 E = BD->param_end(); AI != E; ++AI) {
3277 if (AI != BD->param_begin()) S += ", ";
3278 ParamStr = (*AI)->getNameAsString();
3279 QualType QT = (*AI)->getType();
3280 (void)convertBlockPointerToFunctionPointer(QT);
3281 QT.getAsStringInternal(ParamStr, Context->getPrintingPolicy());
3282 S += ParamStr;
3283 }
3284 if (FT->isVariadic()) {
3285 if (!BD->param_empty()) S += ", ";
3286 S += "...";
3287 }
3288 S += ')';
3289 }
3290 S += " {\n";
3291
3292 // Create local declarations to avoid rewriting all closure decl ref exprs.
3293 // First, emit a declaration for all "by ref" decls.
3294 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
3295 E = BlockByRefDecls.end(); I != E; ++I) {
3296 S += " ";
3297 std::string Name = (*I)->getNameAsString();
3298 std::string TypeString;
3299 RewriteByRefString(TypeString, Name, (*I));
3300 TypeString += " *";
3301 Name = TypeString + Name;
3302 S += Name + " = __cself->" + (*I)->getNameAsString() + "; // bound by ref\n";
3303 }
3304 // Next, emit a declaration for all "by copy" declarations.
3305 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
3306 E = BlockByCopyDecls.end(); I != E; ++I) {
3307 S += " ";
3308 // Handle nested closure invocation. For example:
3309 //
3310 // void (^myImportedClosure)(void);
3311 // myImportedClosure = ^(void) { setGlobalInt(x + y); };
3312 //
3313 // void (^anotherClosure)(void);
3314 // anotherClosure = ^(void) {
3315 // myImportedClosure(); // import and invoke the closure
3316 // };
3317 //
3318 if (isTopLevelBlockPointerType((*I)->getType())) {
3319 RewriteBlockPointerTypeVariable(S, (*I));
3320 S += " = (";
3321 RewriteBlockPointerType(S, (*I)->getType());
3322 S += ")";
3323 S += "__cself->" + (*I)->getNameAsString() + "; // bound by copy\n";
3324 }
3325 else {
3326 std::string Name = (*I)->getNameAsString();
3327 QualType QT = (*I)->getType();
3328 if (HasLocalVariableExternalStorage(*I))
3329 QT = Context->getPointerType(QT);
3330 QT.getAsStringInternal(Name, Context->getPrintingPolicy());
3331 S += Name + " = __cself->" +
3332 (*I)->getNameAsString() + "; // bound by copy\n";
3333 }
3334 }
3335 std::string RewrittenStr = RewrittenBlockExprs[CE];
3336 const char *cstr = RewrittenStr.c_str();
3337 while (*cstr++ != '{') ;
3338 S += cstr;
3339 S += "\n";
3340 return S;
3341 }
3342
3343 std::string RewriteObjC::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
3344 StringRef funcName,
3345 std::string Tag) {
3346 std::string StructRef = "struct " + Tag;
3347 std::string S = "static void __";
3348
3349 S += funcName;
3350 S += "_block_copy_" + utostr(i);
3351 S += "(" + StructRef;
3352 S += "*dst, " + StructRef;
3353 S += "*src) {";
3354 for (ValueDecl *VD : ImportedBlockDecls) {
3355 S += "_Block_object_assign((void*)&dst->";
3356 S += VD->getNameAsString();
3357 S += ", (void*)src->";
3358 S += VD->getNameAsString();
3359 if (BlockByRefDeclsPtrSet.count(VD))
3360 S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
3361 else if (VD->getType()->isBlockPointerType())
3362 S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
3363 else
3364 S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
3365 }
3366 S += "}\n";
3367
3368 S += "\nstatic void __";
3369 S += funcName;
3370 S += "_block_dispose_" + utostr(i);
3371 S += "(" + StructRef;
3372 S += "*src) {";
3373 for (ValueDecl *VD : ImportedBlockDecls) {
3374 S += "_Block_object_dispose((void*)src->";
3375 S += VD->getNameAsString();
3376 if (BlockByRefDeclsPtrSet.count(VD))
3377 S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
3378 else if (VD->getType()->isBlockPointerType())
3379 S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
3380 else
3381 S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
3382 }
3383 S += "}\n";
3384 return S;
3385 }
3386
3387 std::string RewriteObjC::SynthesizeBlockImpl(BlockExpr *CE, std::string Tag,
3388 std::string Desc) {
3389 std::string S = "\nstruct " + Tag;
3390 std::string Constructor = " " + Tag;
3391
3392 S += " {\n struct __block_impl impl;\n";
3393 S += " struct " + Desc;
3394 S += "* Desc;\n";
3395
3396 Constructor += "(void *fp, "; // Invoke function pointer.
3397 Constructor += "struct " + Desc; // Descriptor pointer.
3398 Constructor += " *desc";
3399
3400 if (BlockDeclRefs.size()) {
3401 // Output all "by copy" declarations.
3402 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
3403 E = BlockByCopyDecls.end(); I != E; ++I) {
3404 S += " ";
3405 std::string FieldName = (*I)->getNameAsString();
3406 std::string ArgName = "_" + FieldName;
3407 // Handle nested closure invocation. For example:
3408 //
3409 // void (^myImportedBlock)(void);
3410 // myImportedBlock = ^(void) { setGlobalInt(x + y); };
3411 //
3412 // void (^anotherBlock)(void);
3413 // anotherBlock = ^(void) {
3414 // myImportedBlock(); // import and invoke the closure
3415 // };
3416 //
3417 if (isTopLevelBlockPointerType((*I)->getType())) {
3418 S += "struct __block_impl *";
3419 Constructor += ", void *" + ArgName;
3420 } else {
3421 QualType QT = (*I)->getType();
3422 if (HasLocalVariableExternalStorage(*I))
3423 QT = Context->getPointerType(QT);
3424 QT.getAsStringInternal(FieldName, Context->getPrintingPolicy());
3425 QT.getAsStringInternal(ArgName, Context->getPrintingPolicy());
3426 Constructor += ", " + ArgName;
3427 }
3428 S += FieldName + ";\n";
3429 }
3430 // Output all "by ref" declarations.
3431 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
3432 E = BlockByRefDecls.end(); I != E; ++I) {
3433 S += " ";
3434 std::string FieldName = (*I)->getNameAsString();
3435 std::string ArgName = "_" + FieldName;
3436 {
3437 std::string TypeString;
3438 RewriteByRefString(TypeString, FieldName, (*I));
3439 TypeString += " *";
3440 FieldName = TypeString + FieldName;
3441 ArgName = TypeString + ArgName;
3442 Constructor += ", " + ArgName;
3443 }
3444 S += FieldName + "; // by ref\n";
3445 }
3446 // Finish writing the constructor.
3447 Constructor += ", int flags=0)";
3448 // Initialize all "by copy" arguments.
3449 bool firsTime = true;
3450 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
3451 E = BlockByCopyDecls.end(); I != E; ++I) {
3452 std::string Name = (*I)->getNameAsString();
3453 if (firsTime) {
3454 Constructor += " : ";
3455 firsTime = false;
3456 }
3457 else
3458 Constructor += ", ";
3459 if (isTopLevelBlockPointerType((*I)->getType()))
3460 Constructor += Name + "((struct __block_impl *)_" + Name + ")";
3461 else
3462 Constructor += Name + "(_" + Name + ")";
3463 }
3464 // Initialize all "by ref" arguments.
3465 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
3466 E = BlockByRefDecls.end(); I != E; ++I) {
3467 std::string Name = (*I)->getNameAsString();
3468 if (firsTime) {
3469 Constructor += " : ";
3470 firsTime = false;
3471 }
3472 else
3473 Constructor += ", ";
3474 Constructor += Name + "(_" + Name + "->__forwarding)";
3475 }
3476
3477 Constructor += " {\n";
3478 if (GlobalVarDecl)
3479 Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
3480 else
3481 Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
3482 Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
3483
3484 Constructor += " Desc = desc;\n";
3485 } else {
3486 // Finish writing the constructor.
3487 Constructor += ", int flags=0) {\n";
3488 if (GlobalVarDecl)
3489 Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
3490 else
3491 Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
3492 Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
3493 Constructor += " Desc = desc;\n";
3494 }
3495 Constructor += " ";
3496 Constructor += "}\n";
3497 S += Constructor;
3498 S += "};\n";
3499 return S;
3500 }
3501
3502 std::string RewriteObjC::SynthesizeBlockDescriptor(std::string DescTag,
3503 std::string ImplTag, int i,
3504 StringRef FunName,
3505 unsigned hasCopy) {
3506 std::string S = "\nstatic struct " + DescTag;
3507
3508 S += " {\n unsigned long reserved;\n";
3509 S += " unsigned long Block_size;\n";
3510 if (hasCopy) {
3511 S += " void (*copy)(struct ";
3512 S += ImplTag; S += "*, struct ";
3513 S += ImplTag; S += "*);\n";
3514
3515 S += " void (*dispose)(struct ";
3516 S += ImplTag; S += "*);\n";
3517 }
3518 S += "} ";
3519
3520 S += DescTag + "_DATA = { 0, sizeof(struct ";
3521 S += ImplTag + ")";
3522 if (hasCopy) {
3523 S += ", __" + FunName.str() + "_block_copy_" + utostr(i);
3524 S += ", __" + FunName.str() + "_block_dispose_" + utostr(i);
3525 }
3526 S += "};\n";
3527 return S;
3528 }
3529
3530 void RewriteObjC::SynthesizeBlockLiterals(SourceLocation FunLocStart,
3531 StringRef FunName) {
3532 // Insert declaration for the function in which block literal is used.
3533 if (CurFunctionDeclToDeclareForBlock && !Blocks.empty())
3534 RewriteBlockLiteralFunctionDecl(CurFunctionDeclToDeclareForBlock);
3535 bool RewriteSC = (GlobalVarDecl &&
3536 !Blocks.empty() &&
3537 GlobalVarDecl->getStorageClass() == SC_Static &&
3538 GlobalVarDecl->getType().getCVRQualifiers());
3539 if (RewriteSC) {
3540 std::string SC(" void __");
3541 SC += GlobalVarDecl->getNameAsString();
3542 SC += "() {}";
3543 InsertText(FunLocStart, SC);
3544 }
3545
3546 // Insert closures that were part of the function.
3547 for (unsigned i = 0, count=0; i < Blocks.size(); i++) {
3548 CollectBlockDeclRefInfo(Blocks[i]);
3549 // Need to copy-in the inner copied-in variables not actually used in this
3550 // block.
3551 for (int j = 0; j < InnerDeclRefsCount[i]; j++) {
3552 DeclRefExpr *Exp = InnerDeclRefs[count++];
3553 ValueDecl *VD = Exp->getDecl();
3554 BlockDeclRefs.push_back(Exp);
3555 if (!VD->hasAttr<BlocksAttr>() && !BlockByCopyDeclsPtrSet.count(VD)) {
3556 BlockByCopyDeclsPtrSet.insert(VD);
3557 BlockByCopyDecls.push_back(VD);
3558 }
3559 if (VD->hasAttr<BlocksAttr>() && !BlockByRefDeclsPtrSet.count(VD)) {
3560 BlockByRefDeclsPtrSet.insert(VD);
3561 BlockByRefDecls.push_back(VD);
3562 }
3563 // imported objects in the inner blocks not used in the outer
3564 // blocks must be copied/disposed in the outer block as well.
3565 if (VD->hasAttr<BlocksAttr>() ||
3566 VD->getType()->isObjCObjectPointerType() ||
3567 VD->getType()->isBlockPointerType())
3568 ImportedBlockDecls.insert(VD);
3569 }
3570
3571 std::string ImplTag = "__" + FunName.str() + "_block_impl_" + utostr(i);
3572 std::string DescTag = "__" + FunName.str() + "_block_desc_" + utostr(i);
3573
3574 std::string CI = SynthesizeBlockImpl(Blocks[i], ImplTag, DescTag);
3575
3576 InsertText(FunLocStart, CI);
3577
3578 std::string CF = SynthesizeBlockFunc(Blocks[i], i, FunName, ImplTag);
3579
3580 InsertText(FunLocStart, CF);
3581
3582 if (ImportedBlockDecls.size()) {
3583 std::string HF = SynthesizeBlockHelperFuncs(Blocks[i], i, FunName, ImplTag);
3584 InsertText(FunLocStart, HF);
3585 }
3586 std::string BD = SynthesizeBlockDescriptor(DescTag, ImplTag, i, FunName,
3587 ImportedBlockDecls.size() > 0);
3588 InsertText(FunLocStart, BD);
3589
3590 BlockDeclRefs.clear();
3591 BlockByRefDecls.clear();
3592 BlockByRefDeclsPtrSet.clear();
3593 BlockByCopyDecls.clear();
3594 BlockByCopyDeclsPtrSet.clear();
3595 ImportedBlockDecls.clear();
3596 }
3597 if (RewriteSC) {
3598 // Must insert any 'const/volatile/static here. Since it has been
3599 // removed as result of rewriting of block literals.
3600 std::string SC;
3601 if (GlobalVarDecl->getStorageClass() == SC_Static)
3602 SC = "static ";
3603 if (GlobalVarDecl->getType().isConstQualified())
3604 SC += "const ";
3605 if (GlobalVarDecl->getType().isVolatileQualified())
3606 SC += "volatile ";
3607 if (GlobalVarDecl->getType().isRestrictQualified())
3608 SC += "restrict ";
3609 InsertText(FunLocStart, SC);
3610 }
3611
3612 Blocks.clear();
3613 InnerDeclRefsCount.clear();
3614 InnerDeclRefs.clear();
3615 RewrittenBlockExprs.clear();
3616 }
3617
3618 void RewriteObjC::InsertBlockLiteralsWithinFunction(FunctionDecl *FD) {
3619 SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
3620 StringRef FuncName = FD->getName();
3621
3622 SynthesizeBlockLiterals(FunLocStart, FuncName);
3623 }
3624
3625 static void BuildUniqueMethodName(std::string &Name,
3626 ObjCMethodDecl *MD) {
3627 ObjCInterfaceDecl *IFace = MD->getClassInterface();
3628 Name = IFace->getName();
3629 Name += "__" + MD->getSelector().getAsString();
3630 // Convert colons to underscores.
3631 std::string::size_type loc = 0;
3632 while ((loc = Name.find(':', loc)) != std::string::npos)
3633 Name.replace(loc, 1, "_");
3634 }
3635
3636 void RewriteObjC::InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD) {
3637 // fprintf(stderr,"In InsertBlockLiteralsWitinMethod\n");
3638 // SourceLocation FunLocStart = MD->getBeginLoc();
3639 SourceLocation FunLocStart = MD->getBeginLoc();
3640 std::string FuncName;
3641 BuildUniqueMethodName(FuncName, MD);
3642 SynthesizeBlockLiterals(FunLocStart, FuncName);
3643 }
3644
3645 void RewriteObjC::GetBlockDeclRefExprs(Stmt *S) {
3646 for (Stmt *SubStmt : S->children())
3647 if (SubStmt) {
3648 if (BlockExpr *CBE = dyn_cast<BlockExpr>(SubStmt))
3649 GetBlockDeclRefExprs(CBE->getBody());
3650 else
3651 GetBlockDeclRefExprs(SubStmt);
3652 }
3653 // Handle specific things.
3654 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S))
3655 if (DRE->refersToEnclosingVariableOrCapture() ||
3656 HasLocalVariableExternalStorage(DRE->getDecl()))
3657 // FIXME: Handle enums.
3658 BlockDeclRefs.push_back(DRE);
3659 }
3660
3661 void RewriteObjC::GetInnerBlockDeclRefExprs(Stmt *S,
3662 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
3663 llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts) {
3664 for (Stmt *SubStmt : S->children())
3665 if (SubStmt) {
3666 if (BlockExpr *CBE = dyn_cast<BlockExpr>(SubStmt)) {
3667 InnerContexts.insert(cast<DeclContext>(CBE->getBlockDecl()));
3668 GetInnerBlockDeclRefExprs(CBE->getBody(),
3669 InnerBlockDeclRefs,
3670 InnerContexts);
3671 }
3672 else
3673 GetInnerBlockDeclRefExprs(SubStmt, InnerBlockDeclRefs, InnerContexts);
3674 }
3675 // Handle specific things.
3676 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
3677 if (DRE->refersToEnclosingVariableOrCapture() ||
3678 HasLocalVariableExternalStorage(DRE->getDecl())) {
3679 if (!InnerContexts.count(DRE->getDecl()->getDeclContext()))
3680 InnerBlockDeclRefs.push_back(DRE);
3681 if (VarDecl *Var = cast<VarDecl>(DRE->getDecl()))
3682 if (Var->isFunctionOrMethodVarDecl())
3683 ImportedLocalExternalDecls.insert(Var);
3684 }
3685 }
3686 }
3687
3688 /// convertFunctionTypeOfBlocks - This routine converts a function type
3689 /// whose result type may be a block pointer or whose argument type(s)
3690 /// might be block pointers to an equivalent function type replacing
3691 /// all block pointers to function pointers.
3692 QualType RewriteObjC::convertFunctionTypeOfBlocks(const FunctionType *FT) {
3693 const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
3694 // FTP will be null for closures that don't take arguments.
3695 // Generate a funky cast.
3696 SmallVector<QualType, 8> ArgTypes;
3697 QualType Res = FT->getReturnType();
3698 bool HasBlockType = convertBlockPointerToFunctionPointer(Res);
3699
3700 if (FTP) {
3701 for (auto &I : FTP->param_types()) {
3702 QualType t = I;
3703 // Make sure we convert "t (^)(...)" to "t (*)(...)".
3704 if (convertBlockPointerToFunctionPointer(t))
3705 HasBlockType = true;
3706 ArgTypes.push_back(t);
3707 }
3708 }
3709 QualType FuncType;
3710 // FIXME. Does this work if block takes no argument but has a return type
3711 // which is of block type?
3712 if (HasBlockType)
3713 FuncType = getSimpleFunctionType(Res, ArgTypes);
3714 else FuncType = QualType(FT, 0);
3715 return FuncType;
3716 }
3717
3718 Stmt *RewriteObjC::SynthesizeBlockCall(CallExpr *Exp, const Expr *BlockExp) {
3719 // Navigate to relevant type information.
3720 const BlockPointerType *CPT = nullptr;
3721
3722 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(BlockExp)) {
3723 CPT = DRE->getType()->getAs<BlockPointerType>();
3724 } else if (const MemberExpr *MExpr = dyn_cast<MemberExpr>(BlockExp)) {
3725 CPT = MExpr->getType()->getAs<BlockPointerType>();
3726 }
3727 else if (const ParenExpr *PRE = dyn_cast<ParenExpr>(BlockExp)) {
3728 return SynthesizeBlockCall(Exp, PRE->getSubExpr());
3729 }
3730 else if (const ImplicitCastExpr *IEXPR = dyn_cast<ImplicitCastExpr>(BlockExp))
3731 CPT = IEXPR->getType()->getAs<BlockPointerType>();
3732 else if (const ConditionalOperator *CEXPR =
3733 dyn_cast<ConditionalOperator>(BlockExp)) {
3734 Expr *LHSExp = CEXPR->getLHS();
3735 Stmt *LHSStmt = SynthesizeBlockCall(Exp, LHSExp);
3736 Expr *RHSExp = CEXPR->getRHS();
3737 Stmt *RHSStmt = SynthesizeBlockCall(Exp, RHSExp);
3738 Expr *CONDExp = CEXPR->getCond();
3739 ConditionalOperator *CondExpr =
3740 new (Context) ConditionalOperator(CONDExp,
3741 SourceLocation(), cast<Expr>(LHSStmt),
3742 SourceLocation(), cast<Expr>(RHSStmt),
3743 Exp->getType(), VK_RValue, OK_Ordinary);
3744 return CondExpr;
3745 } else if (const ObjCIvarRefExpr *IRE = dyn_cast<ObjCIvarRefExpr>(BlockExp)) {
3746 CPT = IRE->getType()->getAs<BlockPointerType>();
3747 } else if (const PseudoObjectExpr *POE
3748 = dyn_cast<PseudoObjectExpr>(BlockExp)) {
3749 CPT = POE->getType()->castAs<BlockPointerType>();
3750 } else {
3751 assert(false && "RewriteBlockClass: Bad type");
3752 }
3753 assert(CPT && "RewriteBlockClass: Bad type");
3754 const FunctionType *FT = CPT->getPointeeType()->getAs<FunctionType>();
3755 assert(FT && "RewriteBlockClass: Bad type");
3756 const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
3757 // FTP will be null for closures that don't take arguments.
3758
3759 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
3760 SourceLocation(), SourceLocation(),
3761 &Context->Idents.get("__block_impl"));
3762 QualType PtrBlock = Context->getPointerType(Context->getTagDeclType(RD));
3763
3764 // Generate a funky cast.
3765 SmallVector<QualType, 8> ArgTypes;
3766
3767 // Push the block argument type.
3768 ArgTypes.push_back(PtrBlock);
3769 if (FTP) {
3770 for (auto &I : FTP->param_types()) {
3771 QualType t = I;
3772 // Make sure we convert "t (^)(...)" to "t (*)(...)".
3773 if (!convertBlockPointerToFunctionPointer(t))
3774 convertToUnqualifiedObjCType(t);
3775 ArgTypes.push_back(t);
3776 }
3777 }
3778 // Now do the pointer to function cast.
3779 QualType PtrToFuncCastType = getSimpleFunctionType(Exp->getType(), ArgTypes);
3780
3781 PtrToFuncCastType = Context->getPointerType(PtrToFuncCastType);
3782
3783 CastExpr *BlkCast = NoTypeInfoCStyleCastExpr(Context, PtrBlock,
3784 CK_BitCast,
3785 const_cast<Expr*>(BlockExp));
3786 // Don't forget the parens to enforce the proper binding.
3787 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
3788 BlkCast);
3789 //PE->dump();
3790
3791 FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
3792 SourceLocation(),
3793 &Context->Idents.get("FuncPtr"),
3794 Context->VoidPtrTy, nullptr,
3795 /*BitWidth=*/nullptr, /*Mutable=*/true,
3796 ICIS_NoInit);
3797 MemberExpr *ME =
3798 new (Context) MemberExpr(PE, true, SourceLocation(), FD, SourceLocation(),
3799 FD->getType(), VK_LValue, OK_Ordinary);
3800
3801 CastExpr *FunkCast = NoTypeInfoCStyleCastExpr(Context, PtrToFuncCastType,
3802 CK_BitCast, ME);
3803 PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), FunkCast);
3804
3805 SmallVector<Expr*, 8> BlkExprs;
3806 // Add the implicit argument.
3807 BlkExprs.push_back(BlkCast);
3808 // Add the user arguments.
3809 for (CallExpr::arg_iterator I = Exp->arg_begin(),
3810 E = Exp->arg_end(); I != E; ++I) {
3811 BlkExprs.push_back(*I);
3812 }
3813 CallExpr *CE = CallExpr::Create(*Context, PE, BlkExprs, Exp->getType(),
3814 VK_RValue, SourceLocation());
3815 return CE;
3816 }
3817
3818 // We need to return the rewritten expression to handle cases where the
3819 // BlockDeclRefExpr is embedded in another expression being rewritten.
3820 // For example:
3821 //
3822 // int main() {
3823 // __block Foo *f;
3824 // __block int i;
3825 //
3826 // void (^myblock)() = ^() {
3827 // [f test]; // f is a BlockDeclRefExpr embedded in a message (which is being rewritten).
3828 // i = 77;
3829 // };
3830 //}
3831 Stmt *RewriteObjC::RewriteBlockDeclRefExpr(DeclRefExpr *DeclRefExp) {
3832 // Rewrite the byref variable into BYREFVAR->__forwarding->BYREFVAR
3833 // for each DeclRefExp where BYREFVAR is name of the variable.
3834 ValueDecl *VD = DeclRefExp->getDecl();
3835 bool isArrow = DeclRefExp->refersToEnclosingVariableOrCapture() ||
3836 HasLocalVariableExternalStorage(DeclRefExp->getDecl());
3837
3838 FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
3839 SourceLocation(),
3840 &Context->Idents.get("__forwarding"),
3841 Context->VoidPtrTy, nullptr,
3842 /*BitWidth=*/nullptr, /*Mutable=*/true,
3843 ICIS_NoInit);
3844 MemberExpr *ME = new (Context)
3845 MemberExpr(DeclRefExp, isArrow, SourceLocation(), FD, SourceLocation(),
3846 FD->getType(), VK_LValue, OK_Ordinary);
3847
3848 StringRef Name = VD->getName();
3849 FD = FieldDecl::Create(*Context, nullptr, SourceLocation(), SourceLocation(),
3850 &Context->Idents.get(Name),
3851 Context->VoidPtrTy, nullptr,
3852 /*BitWidth=*/nullptr, /*Mutable=*/true,
3853 ICIS_NoInit);
3854 ME =
3855 new (Context) MemberExpr(ME, true, SourceLocation(), FD, SourceLocation(),
3856 DeclRefExp->getType(), VK_LValue, OK_Ordinary);
3857
3858 // Need parens to enforce precedence.
3859 ParenExpr *PE = new (Context) ParenExpr(DeclRefExp->getExprLoc(),
3860 DeclRefExp->getExprLoc(),
3861 ME);
3862 ReplaceStmt(DeclRefExp, PE);
3863 return PE;
3864 }
3865
3866 // Rewrites the imported local variable V with external storage
3867 // (static, extern, etc.) as *V
3868 //
3869 Stmt *RewriteObjC::RewriteLocalVariableExternalStorage(DeclRefExpr *DRE) {
3870 ValueDecl *VD = DRE->getDecl();
3871 if (VarDecl *Var = dyn_cast<VarDecl>(VD))
3872 if (!ImportedLocalExternalDecls.count(Var))
3873 return DRE;
3874 Expr *Exp = new (Context) UnaryOperator(DRE, UO_Deref, DRE->getType(),
3875 VK_LValue, OK_Ordinary,
3876 DRE->getLocation(), false);
3877 // Need parens to enforce precedence.
3878 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
3879 Exp);
3880 ReplaceStmt(DRE, PE);
3881 return PE;
3882 }
3883
3884 void RewriteObjC::RewriteCastExpr(CStyleCastExpr *CE) {
3885 SourceLocation LocStart = CE->getLParenLoc();
3886 SourceLocation LocEnd = CE->getRParenLoc();
3887
3888 // Need to avoid trying to rewrite synthesized casts.
3889 if (LocStart.isInvalid())
3890 return;
3891 // Need to avoid trying to rewrite casts contained in macros.
3892 if (!Rewriter::isRewritable(LocStart) || !Rewriter::isRewritable(LocEnd))
3893 return;
3894
3895 const char *startBuf = SM->getCharacterData(LocStart);
3896 const char *endBuf = SM->getCharacterData(LocEnd);
3897 QualType QT = CE->getType();
3898 const Type* TypePtr = QT->getAs<Type>();
3899 if (isa<TypeOfExprType>(TypePtr)) {
3900 const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
3901 QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
3902 std::string TypeAsString = "(";
3903 RewriteBlockPointerType(TypeAsString, QT);
3904 TypeAsString += ")";
3905 ReplaceText(LocStart, endBuf-startBuf+1, TypeAsString);
3906 return;
3907 }
3908 // advance the location to startArgList.
3909 const char *argPtr = startBuf;
3910
3911 while (*argPtr++ && (argPtr < endBuf)) {
3912 switch (*argPtr) {
3913 case '^':
3914 // Replace the '^' with '*'.
3915 LocStart = LocStart.getLocWithOffset(argPtr-startBuf);
3916 ReplaceText(LocStart, 1, "*");
3917 break;
3918 }
3919 }
3920 }
3921
3922 void RewriteObjC::RewriteBlockPointerFunctionArgs(FunctionDecl *FD) {
3923 SourceLocation DeclLoc = FD->getLocation();
3924 unsigned parenCount = 0;
3925
3926 // We have 1 or more arguments that have closure pointers.
3927 const char *startBuf = SM->getCharacterData(DeclLoc);
3928 const char *startArgList = strchr(startBuf, '(');
3929
3930 assert((*startArgList == '(') && "Rewriter fuzzy parser confused");
3931
3932 parenCount++;
3933 // advance the location to startArgList.
3934 DeclLoc = DeclLoc.getLocWithOffset(startArgList-startBuf);
3935 assert((DeclLoc.isValid()) && "Invalid DeclLoc");
3936
3937 const char *argPtr = startArgList;
3938
3939 while (*argPtr++ && parenCount) {
3940 switch (*argPtr) {
3941 case '^':
3942 // Replace the '^' with '*'.
3943 DeclLoc = DeclLoc.getLocWithOffset(argPtr-startArgList);
3944 ReplaceText(DeclLoc, 1, "*");
3945 break;
3946 case '(':
3947 parenCount++;
3948 break;
3949 case ')':
3950 parenCount--;
3951 break;
3952 }
3953 }
3954 }
3955
3956 bool RewriteObjC::PointerTypeTakesAnyBlockArguments(QualType QT) {
3957 const FunctionProtoType *FTP;
3958 const PointerType *PT = QT->getAs<PointerType>();
3959 if (PT) {
3960 FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
3961 } else {
3962 const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
3963 assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
3964 FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
3965 }
3966 if (FTP) {
3967 for (const auto &I : FTP->param_types())
3968 if (isTopLevelBlockPointerType(I))
3969 return true;
3970 }
3971 return false;
3972 }
3973
3974 bool RewriteObjC::PointerTypeTakesAnyObjCQualifiedType(QualType QT) {
3975 const FunctionProtoType *FTP;
3976 const PointerType *PT = QT->getAs<PointerType>();
3977 if (PT) {
3978 FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
3979 } else {
3980 const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
3981 assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
3982 FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
3983 }
3984 if (FTP) {
3985 for (const auto &I : FTP->param_types()) {
3986 if (I->isObjCQualifiedIdType())
3987 return true;
3988 if (I->isObjCObjectPointerType() &&
3989 I->getPointeeType()->isObjCQualifiedInterfaceType())
3990 return true;
3991 }
3992
3993 }
3994 return false;
3995 }
3996
3997 void RewriteObjC::GetExtentOfArgList(const char *Name, const char *&LParen,
3998 const char *&RParen) {
3999 const char *argPtr = strchr(Name, '(');
4000 assert((*argPtr == '(') && "Rewriter fuzzy parser confused");
4001
4002 LParen = argPtr; // output the start.
4003 argPtr++; // skip past the left paren.
4004 unsigned parenCount = 1;
4005
4006 while (*argPtr && parenCount) {
4007 switch (*argPtr) {
4008 case '(': parenCount++; break;
4009 case ')': parenCount--; break;
4010 default: break;
4011 }
4012 if (parenCount) argPtr++;
4013 }
4014 assert((*argPtr == ')') && "Rewriter fuzzy parser confused");
4015 RParen = argPtr; // output the end
4016 }
4017
4018 void RewriteObjC::RewriteBlockPointerDecl(NamedDecl *ND) {
4019 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
4020 RewriteBlockPointerFunctionArgs(FD);
4021 return;
4022 }
4023 // Handle Variables and Typedefs.
4024 SourceLocation DeclLoc = ND->getLocation();
4025 QualType DeclT;
4026 if (VarDecl *VD = dyn_cast<VarDecl>(ND))
4027 DeclT = VD->getType();
4028 else if (TypedefNameDecl *TDD = dyn_cast<TypedefNameDecl>(ND))
4029 DeclT = TDD->getUnderlyingType();
4030 else if (FieldDecl *FD = dyn_cast<FieldDecl>(ND))
4031 DeclT = FD->getType();
4032 else
4033 llvm_unreachable("RewriteBlockPointerDecl(): Decl type not yet handled");
4034
4035 const char *startBuf = SM->getCharacterData(DeclLoc);
4036 const char *endBuf = startBuf;
4037 // scan backward (from the decl location) for the end of the previous decl.
4038 while (*startBuf != '^' && *startBuf != ';' && startBuf != MainFileStart)
4039 startBuf--;
4040 SourceLocation Start = DeclLoc.getLocWithOffset(startBuf-endBuf);
4041 std::string buf;
4042 unsigned OrigLength=0;
4043 // *startBuf != '^' if we are dealing with a pointer to function that
4044 // may take block argument types (which will be handled below).
4045 if (*startBuf == '^') {
4046 // Replace the '^' with '*', computing a negative offset.
4047 buf = '*';
4048 startBuf++;
4049 OrigLength++;
4050 }
4051 while (*startBuf != ')') {
4052 buf += *startBuf;
4053 startBuf++;
4054 OrigLength++;
4055 }
4056 buf += ')';
4057 OrigLength++;
4058
4059 if (PointerTypeTakesAnyBlockArguments(DeclT) ||
4060 PointerTypeTakesAnyObjCQualifiedType(DeclT)) {
4061 // Replace the '^' with '*' for arguments.
4062 // Replace id<P> with id/*<>*/
4063 DeclLoc = ND->getLocation();
4064 startBuf = SM->getCharacterData(DeclLoc);
4065 const char *argListBegin, *argListEnd;
4066 GetExtentOfArgList(startBuf, argListBegin, argListEnd);
4067 while (argListBegin < argListEnd) {
4068 if (*argListBegin == '^')
4069 buf += '*';
4070 else if (*argListBegin == '<') {
4071 buf += "/*";
4072 buf += *argListBegin++;
4073 OrigLength++;
4074 while (*argListBegin != '>') {
4075 buf += *argListBegin++;
4076 OrigLength++;
4077 }
4078 buf += *argListBegin;
4079 buf += "*/";
4080 }
4081 else
4082 buf += *argListBegin;
4083 argListBegin++;
4084 OrigLength++;
4085 }
4086 buf += ')';
4087 OrigLength++;
4088 }
4089 ReplaceText(Start, OrigLength, buf);
4090 }
4091
4092 /// SynthesizeByrefCopyDestroyHelper - This routine synthesizes:
4093 /// void __Block_byref_id_object_copy(struct Block_byref_id_object *dst,
4094 /// struct Block_byref_id_object *src) {
4095 /// _Block_object_assign (&_dest->object, _src->object,
4096 /// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4097 /// [|BLOCK_FIELD_IS_WEAK]) // object
4098 /// _Block_object_assign(&_dest->object, _src->object,
4099 /// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4100 /// [|BLOCK_FIELD_IS_WEAK]) // block
4101 /// }
4102 /// And:
4103 /// void __Block_byref_id_object_dispose(struct Block_byref_id_object *_src) {
4104 /// _Block_object_dispose(_src->object,
4105 /// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4106 /// [|BLOCK_FIELD_IS_WEAK]) // object
4107 /// _Block_object_dispose(_src->object,
4108 /// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4109 /// [|BLOCK_FIELD_IS_WEAK]) // block
4110 /// }
4111
4112 std::string RewriteObjC::SynthesizeByrefCopyDestroyHelper(VarDecl *VD,
4113 int flag) {
4114 std::string S;
4115 if (CopyDestroyCache.count(flag))
4116 return S;
4117 CopyDestroyCache.insert(flag);
4118 S = "static void __Block_byref_id_object_copy_";
4119 S += utostr(flag);
4120 S += "(void *dst, void *src) {\n";
4121
4122 // offset into the object pointer is computed as:
4123 // void * + void* + int + int + void* + void *
4124 unsigned IntSize =
4125 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
4126 unsigned VoidPtrSize =
4127 static_cast<unsigned>(Context->getTypeSize(Context->VoidPtrTy));
4128
4129 unsigned offset = (VoidPtrSize*4 + IntSize + IntSize)/Context->getCharWidth();
4130 S += " _Block_object_assign((char*)dst + ";
4131 S += utostr(offset);
4132 S += ", *(void * *) ((char*)src + ";
4133 S += utostr(offset);
4134 S += "), ";
4135 S += utostr(flag);
4136 S += ");\n}\n";
4137
4138 S += "static void __Block_byref_id_object_dispose_";
4139 S += utostr(flag);
4140 S += "(void *src) {\n";
4141 S += " _Block_object_dispose(*(void * *) ((char*)src + ";
4142 S += utostr(offset);
4143 S += "), ";
4144 S += utostr(flag);
4145 S += ");\n}\n";
4146 return S;
4147 }
4148
4149 /// RewriteByRefVar - For each __block typex ND variable this routine transforms
4150 /// the declaration into:
4151 /// struct __Block_byref_ND {
4152 /// void *__isa; // NULL for everything except __weak pointers
4153 /// struct __Block_byref_ND *__forwarding;
4154 /// int32_t __flags;
4155 /// int32_t __size;
4156 /// void *__Block_byref_id_object_copy; // If variable is __block ObjC object
4157 /// void *__Block_byref_id_object_dispose; // If variable is __block ObjC object
4158 /// typex ND;
4159 /// };
4160 ///
4161 /// It then replaces declaration of ND variable with:
4162 /// struct __Block_byref_ND ND = {__isa=0B, __forwarding=&ND, __flags=some_flag,
4163 /// __size=sizeof(struct __Block_byref_ND),
4164 /// ND=initializer-if-any};
4165 ///
4166 ///
4167 void RewriteObjC::RewriteByRefVar(VarDecl *ND) {
4168 // Insert declaration for the function in which block literal is
4169 // used.
4170 if (CurFunctionDeclToDeclareForBlock)
4171 RewriteBlockLiteralFunctionDecl(CurFunctionDeclToDeclareForBlock);
4172 int flag = 0;
4173 int isa = 0;
4174 SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
4175 if (DeclLoc.isInvalid())
4176 // If type location is missing, it is because of missing type (a warning).
4177 // Use variable's location which is good for this case.
4178 DeclLoc = ND->getLocation();
4179 const char *startBuf = SM->getCharacterData(DeclLoc);
4180 SourceLocation X = ND->getEndLoc();
4181 X = SM->getExpansionLoc(X);
4182 const char *endBuf = SM->getCharacterData(X);
4183 std::string Name(ND->getNameAsString());
4184 std::string ByrefType;
4185 RewriteByRefString(ByrefType, Name, ND, true);
4186 ByrefType += " {\n";
4187 ByrefType += " void *__isa;\n";
4188 RewriteByRefString(ByrefType, Name, ND);
4189 ByrefType += " *__forwarding;\n";
4190 ByrefType += " int __flags;\n";
4191 ByrefType += " int __size;\n";
4192 // Add void *__Block_byref_id_object_copy;
4193 // void *__Block_byref_id_object_dispose; if needed.
4194 QualType Ty = ND->getType();
4195 bool HasCopyAndDispose = Context->BlockRequiresCopying(Ty, ND);
4196 if (HasCopyAndDispose) {
4197 ByrefType += " void (*__Block_byref_id_object_copy)(void*, void*);\n";
4198 ByrefType += " void (*__Block_byref_id_object_dispose)(void*);\n";
4199 }
4200
4201 QualType T = Ty;
4202 (void)convertBlockPointerToFunctionPointer(T);
4203 T.getAsStringInternal(Name, Context->getPrintingPolicy());
4204
4205 ByrefType += " " + Name + ";\n";
4206 ByrefType += "};\n";
4207 // Insert this type in global scope. It is needed by helper function.
4208 SourceLocation FunLocStart;
4209 if (CurFunctionDef)
4210 FunLocStart = CurFunctionDef->getTypeSpecStartLoc();
4211 else {
4212 assert(CurMethodDef && "RewriteByRefVar - CurMethodDef is null");
4213 FunLocStart = CurMethodDef->getBeginLoc();
4214 }
4215 InsertText(FunLocStart, ByrefType);
4216 if (Ty.isObjCGCWeak()) {
4217 flag |= BLOCK_FIELD_IS_WEAK;
4218 isa = 1;
4219 }
4220
4221 if (HasCopyAndDispose) {
4222 flag = BLOCK_BYREF_CALLER;
4223 QualType Ty = ND->getType();
4224 // FIXME. Handle __weak variable (BLOCK_FIELD_IS_WEAK) as well.
4225 if (Ty->isBlockPointerType())
4226 flag |= BLOCK_FIELD_IS_BLOCK;
4227 else
4228 flag |= BLOCK_FIELD_IS_OBJECT;
4229 std::string HF = SynthesizeByrefCopyDestroyHelper(ND, flag);
4230 if (!HF.empty())
4231 InsertText(FunLocStart, HF);
4232 }
4233
4234 // struct __Block_byref_ND ND =
4235 // {0, &ND, some_flag, __size=sizeof(struct __Block_byref_ND),
4236 // initializer-if-any};
4237 bool hasInit = (ND->getInit() != nullptr);
4238 unsigned flags = 0;
4239 if (HasCopyAndDispose)
4240 flags |= BLOCK_HAS_COPY_DISPOSE;
4241 Name = ND->getNameAsString();
4242 ByrefType.clear();
4243 RewriteByRefString(ByrefType, Name, ND);
4244 std::string ForwardingCastType("(");
4245 ForwardingCastType += ByrefType + " *)";
4246 if (!hasInit) {
4247 ByrefType += " " + Name + " = {(void*)";
4248 ByrefType += utostr(isa);
4249 ByrefType += "," + ForwardingCastType + "&" + Name + ", ";
4250 ByrefType += utostr(flags);
4251 ByrefType += ", ";
4252 ByrefType += "sizeof(";
4253 RewriteByRefString(ByrefType, Name, ND);
4254 ByrefType += ")";
4255 if (HasCopyAndDispose) {
4256 ByrefType += ", __Block_byref_id_object_copy_";
4257 ByrefType += utostr(flag);
4258 ByrefType += ", __Block_byref_id_object_dispose_";
4259 ByrefType += utostr(flag);
4260 }
4261 ByrefType += "};\n";
4262 unsigned nameSize = Name.size();
4263 // for block or function pointer declaration. Name is already
4264 // part of the declaration.
4265 if (Ty->isBlockPointerType() || Ty->isFunctionPointerType())
4266 nameSize = 1;
4267 ReplaceText(DeclLoc, endBuf-startBuf+nameSize, ByrefType);
4268 }
4269 else {
4270 SourceLocation startLoc;
4271 Expr *E = ND->getInit();
4272 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
4273 startLoc = ECE->getLParenLoc();
4274 else
4275 startLoc = E->getBeginLoc();
4276 startLoc = SM->getExpansionLoc(startLoc);
4277 endBuf = SM->getCharacterData(startLoc);
4278 ByrefType += " " + Name;
4279 ByrefType += " = {(void*)";
4280 ByrefType += utostr(isa);
4281 ByrefType += "," + ForwardingCastType + "&" + Name + ", ";
4282 ByrefType += utostr(flags);
4283 ByrefType += ", ";
4284 ByrefType += "sizeof(";
4285 RewriteByRefString(ByrefType, Name, ND);
4286 ByrefType += "), ";
4287 if (HasCopyAndDispose) {
4288 ByrefType += "__Block_byref_id_object_copy_";
4289 ByrefType += utostr(flag);
4290 ByrefType += ", __Block_byref_id_object_dispose_";
4291 ByrefType += utostr(flag);
4292 ByrefType += ", ";
4293 }
4294 ReplaceText(DeclLoc, endBuf-startBuf, ByrefType);
4295
4296 // Complete the newly synthesized compound expression by inserting a right
4297 // curly brace before the end of the declaration.
4298 // FIXME: This approach avoids rewriting the initializer expression. It
4299 // also assumes there is only one declarator. For example, the following
4300 // isn't currently supported by this routine (in general):
4301 //
4302 // double __block BYREFVAR = 1.34, BYREFVAR2 = 1.37;
4303 //
4304 const char *startInitializerBuf = SM->getCharacterData(startLoc);
4305 const char *semiBuf = strchr(startInitializerBuf, ';');
4306 assert((*semiBuf == ';') && "RewriteByRefVar: can't find ';'");
4307 SourceLocation semiLoc =
4308 startLoc.getLocWithOffset(semiBuf-startInitializerBuf);
4309
4310 InsertText(semiLoc, "}");
4311 }
4312 }
4313
4314 void RewriteObjC::CollectBlockDeclRefInfo(BlockExpr *Exp) {
4315 // Add initializers for any closure decl refs.
4316 GetBlockDeclRefExprs(Exp->getBody());
4317 if (BlockDeclRefs.size()) {
4318 // Unique all "by copy" declarations.
4319 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
4320 if (!BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
4321 if (!BlockByCopyDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
4322 BlockByCopyDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
4323 BlockByCopyDecls.push_back(BlockDeclRefs[i]->getDecl());
4324 }
4325 }
4326 // Unique all "by ref" declarations.
4327 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
4328 if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
4329 if (!BlockByRefDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
4330 BlockByRefDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
4331 BlockByRefDecls.push_back(BlockDeclRefs[i]->getDecl());
4332 }
4333 }
4334 // Find any imported blocks...they will need special attention.
4335 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
4336 if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
4337 BlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
4338 BlockDeclRefs[i]->getType()->isBlockPointerType())
4339 ImportedBlockDecls.insert(BlockDeclRefs[i]->getDecl());
4340 }
4341 }
4342
4343 FunctionDecl *RewriteObjC::SynthBlockInitFunctionDecl(StringRef name) {
4344 IdentifierInfo *ID = &Context->Idents.get(name);
4345 QualType FType = Context->getFunctionNoProtoType(Context->VoidPtrTy);
4346 return FunctionDecl::Create(*Context, TUDecl, SourceLocation(),
4347 SourceLocation(), ID, FType, nullptr, SC_Extern,
4348 false, false);
4349 }
4350
4351 Stmt *RewriteObjC::SynthBlockInitExpr(BlockExpr *Exp,
4352 const SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs) {
4353 const BlockDecl *block = Exp->getBlockDecl();
4354 Blocks.push_back(Exp);
4355
4356 CollectBlockDeclRefInfo(Exp);
4357
4358 // Add inner imported variables now used in current block.
4359 int countOfInnerDecls = 0;
4360 if (!InnerBlockDeclRefs.empty()) {
4361 for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++) {
4362 DeclRefExpr *Exp = InnerBlockDeclRefs[i];
4363 ValueDecl *VD = Exp->getDecl();
4364 if (!VD->hasAttr<BlocksAttr>() && !BlockByCopyDeclsPtrSet.count(VD)) {
4365 // We need to save the copied-in variables in nested
4366 // blocks because it is needed at the end for some of the API generations.
4367 // See SynthesizeBlockLiterals routine.
4368 InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
4369 BlockDeclRefs.push_back(Exp);
4370 BlockByCopyDeclsPtrSet.insert(VD);
4371 BlockByCopyDecls.push_back(VD);
4372 }
4373 if (VD->hasAttr<BlocksAttr>() && !BlockByRefDeclsPtrSet.count(VD)) {
4374 InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
4375 BlockDeclRefs.push_back(Exp);
4376 BlockByRefDeclsPtrSet.insert(VD);
4377 BlockByRefDecls.push_back(VD);
4378 }
4379 }
4380 // Find any imported blocks...they will need special attention.
4381 for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++)
4382 if (InnerBlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
4383 InnerBlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
4384 InnerBlockDeclRefs[i]->getType()->isBlockPointerType())
4385 ImportedBlockDecls.insert(InnerBlockDeclRefs[i]->getDecl());
4386 }
4387 InnerDeclRefsCount.push_back(countOfInnerDecls);
4388
4389 std::string FuncName;
4390
4391 if (CurFunctionDef)
4392 FuncName = CurFunctionDef->getNameAsString();
4393 else if (CurMethodDef)
4394 BuildUniqueMethodName(FuncName, CurMethodDef);
4395 else if (GlobalVarDecl)
4396 FuncName = std::string(GlobalVarDecl->getNameAsString());
4397
4398 std::string BlockNumber = utostr(Blocks.size()-1);
4399
4400 std::string Tag = "__" + FuncName + "_block_impl_" + BlockNumber;
4401 std::string Func = "__" + FuncName + "_block_func_" + BlockNumber;
4402
4403 // Get a pointer to the function type so we can cast appropriately.
4404 QualType BFT = convertFunctionTypeOfBlocks(Exp->getFunctionType());
4405 QualType FType = Context->getPointerType(BFT);
4406
4407 FunctionDecl *FD;
4408 Expr *NewRep;
4409
4410 // Simulate a constructor call...
4411 FD = SynthBlockInitFunctionDecl(Tag);
4412 DeclRefExpr *DRE = new (Context)
4413 DeclRefExpr(*Context, FD, false, FType, VK_RValue, SourceLocation());
4414
4415 SmallVector<Expr*, 4> InitExprs;
4416
4417 // Initialize the block function.
4418 FD = SynthBlockInitFunctionDecl(Func);
4419 DeclRefExpr *Arg = new (Context) DeclRefExpr(
4420 *Context, FD, false, FD->getType(), VK_LValue, SourceLocation());
4421 CastExpr *castExpr =
4422 NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy, CK_BitCast, Arg);
4423 InitExprs.push_back(castExpr);
4424
4425 // Initialize the block descriptor.
4426 std::string DescData = "__" + FuncName + "_block_desc_" + BlockNumber + "_DATA";
4427
4428 VarDecl *NewVD = VarDecl::Create(
4429 *Context, TUDecl, SourceLocation(), SourceLocation(),
4430 &Context->Idents.get(DescData), Context->VoidPtrTy, nullptr, SC_Static);
4431 UnaryOperator *DescRefExpr = new (Context) UnaryOperator(
4432 new (Context) DeclRefExpr(*Context, NewVD, false, Context->VoidPtrTy,
4433 VK_LValue, SourceLocation()),
4434 UO_AddrOf, Context->getPointerType(Context->VoidPtrTy), VK_RValue,
4435 OK_Ordinary, SourceLocation(), false);
4436 InitExprs.push_back(DescRefExpr);
4437
4438 // Add initializers for any closure decl refs.
4439 if (BlockDeclRefs.size()) {
4440 Expr *Exp;
4441 // Output all "by copy" declarations.
4442 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4443 E = BlockByCopyDecls.end(); I != E; ++I) {
4444 if (isObjCType((*I)->getType())) {
4445 // FIXME: Conform to ABI ([[obj retain] autorelease]).
4446 FD = SynthBlockInitFunctionDecl((*I)->getName());
4447 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
4448 VK_LValue, SourceLocation());
4449 if (HasLocalVariableExternalStorage(*I)) {
4450 QualType QT = (*I)->getType();
4451 QT = Context->getPointerType(QT);
4452 Exp = new (Context) UnaryOperator(Exp, UO_AddrOf, QT, VK_RValue,
4453 OK_Ordinary, SourceLocation(),
4454 false);
4455 }
4456 } else if (isTopLevelBlockPointerType((*I)->getType())) {
4457 FD = SynthBlockInitFunctionDecl((*I)->getName());
4458 Arg = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
4459 VK_LValue, SourceLocation());
4460 Exp = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy, CK_BitCast,
4461 Arg);
4462 } else {
4463 FD = SynthBlockInitFunctionDecl((*I)->getName());
4464 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
4465 VK_LValue, SourceLocation());
4466 if (HasLocalVariableExternalStorage(*I)) {
4467 QualType QT = (*I)->getType();
4468 QT = Context->getPointerType(QT);
4469 Exp = new (Context) UnaryOperator(Exp, UO_AddrOf, QT, VK_RValue,
4470 OK_Ordinary, SourceLocation(),
4471 false);
4472 }
4473 }
4474 InitExprs.push_back(Exp);
4475 }
4476 // Output all "by ref" declarations.
4477 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4478 E = BlockByRefDecls.end(); I != E; ++I) {
4479 ValueDecl *ND = (*I);
4480 std::string Name(ND->getNameAsString());
4481 std::string RecName;
4482 RewriteByRefString(RecName, Name, ND, true);
4483 IdentifierInfo *II = &Context->Idents.get(RecName.c_str()
4484 + sizeof("struct"));
4485 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
4486 SourceLocation(), SourceLocation(),
4487 II);
4488 assert(RD && "SynthBlockInitExpr(): Can't find RecordDecl");
4489 QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
4490
4491 FD = SynthBlockInitFunctionDecl((*I)->getName());
4492 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
4493 VK_LValue, SourceLocation());
4494 bool isNestedCapturedVar = false;
4495 if (block)
4496 for (const auto &CI : block->captures()) {
4497 const VarDecl *variable = CI.getVariable();
4498 if (variable == ND && CI.isNested()) {
4499 assert (CI.isByRef() &&
4500 "SynthBlockInitExpr - captured block variable is not byref");
4501 isNestedCapturedVar = true;
4502 break;
4503 }
4504 }
4505 // captured nested byref variable has its address passed. Do not take
4506 // its address again.
4507 if (!isNestedCapturedVar)
4508 Exp = new (Context) UnaryOperator(
4509 Exp, UO_AddrOf, Context->getPointerType(Exp->getType()), VK_RValue,
4510 OK_Ordinary, SourceLocation(), false);
4511 Exp = NoTypeInfoCStyleCastExpr(Context, castT, CK_BitCast, Exp);
4512 InitExprs.push_back(Exp);
4513 }
4514 }
4515 if (ImportedBlockDecls.size()) {
4516 // generate BLOCK_HAS_COPY_DISPOSE(have helper funcs) | BLOCK_HAS_DESCRIPTOR
4517 int flag = (BLOCK_HAS_COPY_DISPOSE | BLOCK_HAS_DESCRIPTOR);
4518 unsigned IntSize =
4519 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
4520 Expr *FlagExp = IntegerLiteral::Create(*Context, llvm::APInt(IntSize, flag),
4521 Context->IntTy, SourceLocation());
4522 InitExprs.push_back(FlagExp);
4523 }
4524 NewRep = CallExpr::Create(*Context, DRE, InitExprs, FType, VK_LValue,
4525 SourceLocation());
4526 NewRep = new (Context) UnaryOperator(
4527 NewRep, UO_AddrOf, Context->getPointerType(NewRep->getType()), VK_RValue,
4528 OK_Ordinary, SourceLocation(), false);
4529 NewRep = NoTypeInfoCStyleCastExpr(Context, FType, CK_BitCast,
4530 NewRep);
4531 BlockDeclRefs.clear();
4532 BlockByRefDecls.clear();
4533 BlockByRefDeclsPtrSet.clear();
4534 BlockByCopyDecls.clear();
4535 BlockByCopyDeclsPtrSet.clear();
4536 ImportedBlockDecls.clear();
4537 return NewRep;
4538 }
4539
4540 bool RewriteObjC::IsDeclStmtInForeachHeader(DeclStmt *DS) {
4541 if (const ObjCForCollectionStmt * CS =
4542 dyn_cast<ObjCForCollectionStmt>(Stmts.back()))
4543 return CS->getElement() == DS;
4544 return false;
4545 }
4546
4547 //===----------------------------------------------------------------------===//
4548 // Function Body / Expression rewriting
4549 //===----------------------------------------------------------------------===//
4550
4551 Stmt *RewriteObjC::RewriteFunctionBodyOrGlobalInitializer(Stmt *S) {
4552 if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
4553 isa<DoStmt>(S) || isa<ForStmt>(S))
4554 Stmts.push_back(S);
4555 else if (isa<ObjCForCollectionStmt>(S)) {
4556 Stmts.push_back(S);
4557 ObjCBcLabelNo.push_back(++BcLabelCount);
4558 }
4559
4560 // Pseudo-object operations and ivar references need special
4561 // treatment because we're going to recursively rewrite them.
4562 if (PseudoObjectExpr *PseudoOp = dyn_cast<PseudoObjectExpr>(S)) {
4563 if (isa<BinaryOperator>(PseudoOp->getSyntacticForm())) {
4564 return RewritePropertyOrImplicitSetter(PseudoOp);
4565 } else {
4566 return RewritePropertyOrImplicitGetter(PseudoOp);
4567 }
4568 } else if (ObjCIvarRefExpr *IvarRefExpr = dyn_cast<ObjCIvarRefExpr>(S)) {
4569 return RewriteObjCIvarRefExpr(IvarRefExpr);
4570 }
4571
4572 SourceRange OrigStmtRange = S->getSourceRange();
4573
4574 // Perform a bottom up rewrite of all children.
4575 for (Stmt *&childStmt : S->children())
4576 if (childStmt) {
4577 Stmt *newStmt = RewriteFunctionBodyOrGlobalInitializer(childStmt);
4578 if (newStmt) {
4579 childStmt = newStmt;
4580 }
4581 }
4582
4583 if (BlockExpr *BE = dyn_cast<BlockExpr>(S)) {
4584 SmallVector<DeclRefExpr *, 8> InnerBlockDeclRefs;
4585 llvm::SmallPtrSet<const DeclContext *, 8> InnerContexts;
4586 InnerContexts.insert(BE->getBlockDecl());
4587 ImportedLocalExternalDecls.clear();
4588 GetInnerBlockDeclRefExprs(BE->getBody(),
4589 InnerBlockDeclRefs, InnerContexts);
4590 // Rewrite the block body in place.
4591 Stmt *SaveCurrentBody = CurrentBody;
4592 CurrentBody = BE->getBody();
4593 PropParentMap = nullptr;
4594 // block literal on rhs of a property-dot-sytax assignment
4595 // must be replaced by its synthesize ast so getRewrittenText
4596 // works as expected. In this case, what actually ends up on RHS
4597 // is the blockTranscribed which is the helper function for the
4598 // block literal; as in: self.c = ^() {[ace ARR];};
4599 bool saveDisableReplaceStmt = DisableReplaceStmt;
4600 DisableReplaceStmt = false;
4601 RewriteFunctionBodyOrGlobalInitializer(BE->getBody());
4602 DisableReplaceStmt = saveDisableReplaceStmt;
4603 CurrentBody = SaveCurrentBody;
4604 PropParentMap = nullptr;
4605 ImportedLocalExternalDecls.clear();
4606 // Now we snarf the rewritten text and stash it away for later use.
4607 std::string Str = Rewrite.getRewrittenText(BE->getSourceRange());
4608 RewrittenBlockExprs[BE] = Str;
4609
4610 Stmt *blockTranscribed = SynthBlockInitExpr(BE, InnerBlockDeclRefs);
4611
4612 //blockTranscribed->dump();
4613 ReplaceStmt(S, blockTranscribed);
4614 return blockTranscribed;
4615 }
4616 // Handle specific things.
4617 if (ObjCEncodeExpr *AtEncode = dyn_cast<ObjCEncodeExpr>(S))
4618 return RewriteAtEncode(AtEncode);
4619
4620 if (ObjCSelectorExpr *AtSelector = dyn_cast<ObjCSelectorExpr>(S))
4621 return RewriteAtSelector(AtSelector);
4622
4623 if (ObjCStringLiteral *AtString = dyn_cast<ObjCStringLiteral>(S))
4624 return RewriteObjCStringLiteral(AtString);
4625
4626 if (ObjCMessageExpr *MessExpr = dyn_cast<ObjCMessageExpr>(S)) {
4627 #if 0
4628 // Before we rewrite it, put the original message expression in a comment.
4629 SourceLocation startLoc = MessExpr->getBeginLoc();
4630 SourceLocation endLoc = MessExpr->getEndLoc();
4631
4632 const char *startBuf = SM->getCharacterData(startLoc);
4633 const char *endBuf = SM->getCharacterData(endLoc);
4634
4635 std::string messString;
4636 messString += "// ";
4637 messString.append(startBuf, endBuf-startBuf+1);
4638 messString += "\n";
4639
4640 // FIXME: Missing definition of
4641 // InsertText(clang::SourceLocation, char const*, unsigned int).
4642 // InsertText(startLoc, messString);
4643 // Tried this, but it didn't work either...
4644 // ReplaceText(startLoc, 0, messString.c_str(), messString.size());
4645 #endif
4646 return RewriteMessageExpr(MessExpr);
4647 }
4648
4649 if (ObjCAtTryStmt *StmtTry = dyn_cast<ObjCAtTryStmt>(S))
4650 return RewriteObjCTryStmt(StmtTry);
4651
4652 if (ObjCAtSynchronizedStmt *StmtTry = dyn_cast<ObjCAtSynchronizedStmt>(S))
4653 return RewriteObjCSynchronizedStmt(StmtTry);
4654
4655 if (ObjCAtThrowStmt *StmtThrow = dyn_cast<ObjCAtThrowStmt>(S))
4656 return RewriteObjCThrowStmt(StmtThrow);
4657
4658 if (ObjCProtocolExpr *ProtocolExp = dyn_cast<ObjCProtocolExpr>(S))
4659 return RewriteObjCProtocolExpr(ProtocolExp);
4660
4661 if (ObjCForCollectionStmt *StmtForCollection =
4662 dyn_cast<ObjCForCollectionStmt>(S))
4663 return RewriteObjCForCollectionStmt(StmtForCollection,
4664 OrigStmtRange.getEnd());
4665 if (BreakStmt *StmtBreakStmt =
4666 dyn_cast<BreakStmt>(S))
4667 return RewriteBreakStmt(StmtBreakStmt);
4668 if (ContinueStmt *StmtContinueStmt =
4669 dyn_cast<ContinueStmt>(S))
4670 return RewriteContinueStmt(StmtContinueStmt);
4671
4672 // Need to check for protocol refs (id <P>, Foo <P> *) in variable decls
4673 // and cast exprs.
4674 if (DeclStmt *DS = dyn_cast<DeclStmt>(S)) {
4675 // FIXME: What we're doing here is modifying the type-specifier that
4676 // precedes the first Decl. In the future the DeclGroup should have
4677 // a separate type-specifier that we can rewrite.
4678 // NOTE: We need to avoid rewriting the DeclStmt if it is within
4679 // the context of an ObjCForCollectionStmt. For example:
4680 // NSArray *someArray;
4681 // for (id <FooProtocol> index in someArray) ;
4682 // This is because RewriteObjCForCollectionStmt() does textual rewriting
4683 // and it depends on the original text locations/positions.
4684 if (Stmts.empty() || !IsDeclStmtInForeachHeader(DS))
4685 RewriteObjCQualifiedInterfaceTypes(*DS->decl_begin());
4686
4687 // Blocks rewrite rules.
4688 for (auto *SD : DS->decls()) {
4689 if (ValueDecl *ND = dyn_cast<ValueDecl>(SD)) {
4690 if (isTopLevelBlockPointerType(ND->getType()))
4691 RewriteBlockPointerDecl(ND);
4692 else if (ND->getType()->isFunctionPointerType())
4693 CheckFunctionPointerDecl(ND->getType(), ND);
4694 if (VarDecl *VD = dyn_cast<VarDecl>(SD)) {
4695 if (VD->hasAttr<BlocksAttr>()) {
4696 static unsigned uniqueByrefDeclCount = 0;
4697 assert(!BlockByRefDeclNo.count(ND) &&
4698 "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl");
4699 BlockByRefDeclNo[ND] = uniqueByrefDeclCount++;
4700 RewriteByRefVar(VD);
4701 }
4702 else
4703 RewriteTypeOfDecl(VD);
4704 }
4705 }
4706 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(SD)) {
4707 if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
4708 RewriteBlockPointerDecl(TD);
4709 else if (TD->getUnderlyingType()->isFunctionPointerType())
4710 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
4711 }
4712 }
4713 }
4714
4715 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S))
4716 RewriteObjCQualifiedInterfaceTypes(CE);
4717
4718 if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
4719 isa<DoStmt>(S) || isa<ForStmt>(S)) {
4720 assert(!Stmts.empty() && "Statement stack is empty");
4721 assert ((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) ||
4722 isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back()))
4723 && "Statement stack mismatch");
4724 Stmts.pop_back();
4725 }
4726 // Handle blocks rewriting.
4727 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
4728 ValueDecl *VD = DRE->getDecl();
4729 if (VD->hasAttr<BlocksAttr>())
4730 return RewriteBlockDeclRefExpr(DRE);
4731 if (HasLocalVariableExternalStorage(VD))
4732 return RewriteLocalVariableExternalStorage(DRE);
4733 }
4734
4735 if (CallExpr *CE = dyn_cast<CallExpr>(S)) {
4736 if (CE->getCallee()->getType()->isBlockPointerType()) {
4737 Stmt *BlockCall = SynthesizeBlockCall(CE, CE->getCallee());
4738 ReplaceStmt(S, BlockCall);
4739 return BlockCall;
4740 }
4741 }
4742 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S)) {
4743 RewriteCastExpr(CE);
4744 }
4745 #if 0
4746 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
4747 CastExpr *Replacement = new (Context) CastExpr(ICE->getType(),
4748 ICE->getSubExpr(),
4749 SourceLocation());
4750 // Get the new text.
4751 std::string SStr;
4752 llvm::raw_string_ostream Buf(SStr);
4753 Replacement->printPretty(Buf);
4754 const std::string &Str = Buf.str();
4755
4756 printf("CAST = %s\n", &Str[0]);
4757 InsertText(ICE->getSubExpr()->getBeginLoc(), Str);
4758 delete S;
4759 return Replacement;
4760 }
4761 #endif
4762 // Return this stmt unmodified.
4763 return S;
4764 }
4765
4766 void RewriteObjC::RewriteRecordBody(RecordDecl *RD) {
4767 for (auto *FD : RD->fields()) {
4768 if (isTopLevelBlockPointerType(FD->getType()))
4769 RewriteBlockPointerDecl(FD);
4770 if (FD->getType()->isObjCQualifiedIdType() ||
4771 FD->getType()->isObjCQualifiedInterfaceType())
4772 RewriteObjCQualifiedInterfaceTypes(FD);
4773 }
4774 }
4775
4776 /// HandleDeclInMainFile - This is called for each top-level decl defined in the
4777 /// main file of the input.
4778 void RewriteObjC::HandleDeclInMainFile(Decl *D) {
4779 switch (D->getKind()) {
4780 case Decl::Function: {
4781 FunctionDecl *FD = cast<FunctionDecl>(D);
4782 if (FD->isOverloadedOperator())
4783 return;
4784
4785 // Since function prototypes don't have ParmDecl's, we check the function
4786 // prototype. This enables us to rewrite function declarations and
4787 // definitions using the same code.
4788 RewriteBlocksInFunctionProtoType(FD->getType(), FD);
4789
4790 if (!FD->isThisDeclarationADefinition())
4791 break;
4792
4793 // FIXME: If this should support Obj-C++, support CXXTryStmt
4794 if (CompoundStmt *Body = dyn_cast_or_null<CompoundStmt>(FD->getBody())) {
4795 CurFunctionDef = FD;
4796 CurFunctionDeclToDeclareForBlock = FD;
4797 CurrentBody = Body;
4798 Body =
4799 cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
4800 FD->setBody(Body);
4801 CurrentBody = nullptr;
4802 if (PropParentMap) {
4803 delete PropParentMap;
4804 PropParentMap = nullptr;
4805 }
4806 // This synthesizes and inserts the block "impl" struct, invoke function,
4807 // and any copy/dispose helper functions.
4808 InsertBlockLiteralsWithinFunction(FD);
4809 CurFunctionDef = nullptr;
4810 CurFunctionDeclToDeclareForBlock = nullptr;
4811 }
4812 break;
4813 }
4814 case Decl::ObjCMethod: {
4815 ObjCMethodDecl *MD = cast<ObjCMethodDecl>(D);
4816 if (CompoundStmt *Body = MD->getCompoundBody()) {
4817 CurMethodDef = MD;
4818 CurrentBody = Body;
4819 Body =
4820 cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
4821 MD->setBody(Body);
4822 CurrentBody = nullptr;
4823 if (PropParentMap) {
4824 delete PropParentMap;
4825 PropParentMap = nullptr;
4826 }
4827 InsertBlockLiteralsWithinMethod(MD);
4828 CurMethodDef = nullptr;
4829 }
4830 break;
4831 }
4832 case Decl::ObjCImplementation: {
4833 ObjCImplementationDecl *CI = cast<ObjCImplementationDecl>(D);
4834 ClassImplementation.push_back(CI);
4835 break;
4836 }
4837 case Decl::ObjCCategoryImpl: {
4838 ObjCCategoryImplDecl *CI = cast<ObjCCategoryImplDecl>(D);
4839 CategoryImplementation.push_back(CI);
4840 break;
4841 }
4842 case Decl::Var: {
4843 VarDecl *VD = cast<VarDecl>(D);
4844 RewriteObjCQualifiedInterfaceTypes(VD);
4845 if (isTopLevelBlockPointerType(VD->getType()))
4846 RewriteBlockPointerDecl(VD);
4847 else if (VD->getType()->isFunctionPointerType()) {
4848 CheckFunctionPointerDecl(VD->getType(), VD);
4849 if (VD->getInit()) {
4850 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
4851 RewriteCastExpr(CE);
4852 }
4853 }
4854 } else if (VD->getType()->isRecordType()) {
4855 RecordDecl *RD = VD->getType()->getAs<RecordType>()->getDecl();
4856 if (RD->isCompleteDefinition())
4857 RewriteRecordBody(RD);
4858 }
4859 if (VD->getInit()) {
4860 GlobalVarDecl = VD;
4861 CurrentBody = VD->getInit();
4862 RewriteFunctionBodyOrGlobalInitializer(VD->getInit());
4863 CurrentBody = nullptr;
4864 if (PropParentMap) {
4865 delete PropParentMap;
4866 PropParentMap = nullptr;
4867 }
4868 SynthesizeBlockLiterals(VD->getTypeSpecStartLoc(), VD->getName());
4869 GlobalVarDecl = nullptr;
4870
4871 // This is needed for blocks.
4872 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
4873 RewriteCastExpr(CE);
4874 }
4875 }
4876 break;
4877 }
4878 case Decl::TypeAlias:
4879 case Decl::Typedef: {
4880 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(D)) {
4881 if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
4882 RewriteBlockPointerDecl(TD);
4883 else if (TD->getUnderlyingType()->isFunctionPointerType())
4884 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
4885 }
4886 break;
4887 }
4888 case Decl::CXXRecord:
4889 case Decl::Record: {
4890 RecordDecl *RD = cast<RecordDecl>(D);
4891 if (RD->isCompleteDefinition())
4892 RewriteRecordBody(RD);
4893 break;
4894 }
4895 default:
4896 break;
4897 }
4898 // Nothing yet.
4899 }
4900
4901 void RewriteObjC::HandleTranslationUnit(ASTContext &C) {
4902 if (Diags.hasErrorOccurred())
4903 return;
4904
4905 RewriteInclude();
4906
4907 // Here's a great place to add any extra declarations that may be needed.
4908 // Write out meta data for each @protocol(<expr>).
4909 for (ObjCProtocolDecl *ProtDecl : ProtocolExprDecls)
4910 RewriteObjCProtocolMetaData(ProtDecl, "", "", Preamble);
4911
4912 InsertText(SM->getLocForStartOfFile(MainFileID), Preamble, false);
4913 if (ClassImplementation.size() || CategoryImplementation.size())
4914 RewriteImplementations();
4915
4916 // Get the buffer corresponding to MainFileID. If we haven't changed it, then
4917 // we are done.
4918 if (const RewriteBuffer *RewriteBuf =
4919 Rewrite.getRewriteBufferFor(MainFileID)) {
4920 //printf("Changed:\n");
4921 *OutFile << std::string(RewriteBuf->begin(), RewriteBuf->end());
4922 } else {
4923 llvm::errs() << "No changes\n";
4924 }
4925
4926 if (ClassImplementation.size() || CategoryImplementation.size() ||
4927 ProtocolExprDecls.size()) {
4928 // Rewrite Objective-c meta data*
4929 std::string ResultStr;
4930 RewriteMetaDataIntoBuffer(ResultStr);
4931 // Emit metadata.
4932 *OutFile << ResultStr;
4933 }
4934 OutFile->flush();
4935 }
4936
4937 void RewriteObjCFragileABI::Initialize(ASTContext &context) {
4938 InitializeCommon(context);
4939
4940 // declaring objc_selector outside the parameter list removes a silly
4941 // scope related warning...
4942 if (IsHeader)
4943 Preamble = "#pragma once\n";
4944 Preamble += "struct objc_selector; struct objc_class;\n";
4945 Preamble += "struct __rw_objc_super { struct objc_object *object; ";
4946 Preamble += "struct objc_object *superClass; ";
4947 if (LangOpts.MicrosoftExt) {
4948 // Add a constructor for creating temporary objects.
4949 Preamble += "__rw_objc_super(struct objc_object *o, struct objc_object *s) "
4950 ": ";
4951 Preamble += "object(o), superClass(s) {} ";
4952 }
4953 Preamble += "};\n";
4954 Preamble += "#ifndef _REWRITER_typedef_Protocol\n";
4955 Preamble += "typedef struct objc_object Protocol;\n";
4956 Preamble += "#define _REWRITER_typedef_Protocol\n";
4957 Preamble += "#endif\n";
4958 if (LangOpts.MicrosoftExt) {
4959 Preamble += "#define __OBJC_RW_DLLIMPORT extern \"C\" __declspec(dllimport)\n";
4960 Preamble += "#define __OBJC_RW_STATICIMPORT extern \"C\"\n";
4961 } else
4962 Preamble += "#define __OBJC_RW_DLLIMPORT extern\n";
4963 Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_msgSend";
4964 Preamble += "(struct objc_object *, struct objc_selector *, ...);\n";
4965 Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_msgSendSuper";
4966 Preamble += "(struct objc_super *, struct objc_selector *, ...);\n";
4967 Preamble += "__OBJC_RW_DLLIMPORT struct objc_object* objc_msgSend_stret";
4968 Preamble += "(struct objc_object *, struct objc_selector *, ...);\n";
4969 Preamble += "__OBJC_RW_DLLIMPORT struct objc_object* objc_msgSendSuper_stret";
4970 Preamble += "(struct objc_super *, struct objc_selector *, ...);\n";
4971 Preamble += "__OBJC_RW_DLLIMPORT double objc_msgSend_fpret";
4972 Preamble += "(struct objc_object *, struct objc_selector *, ...);\n";
4973 Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_getClass";
4974 Preamble += "(const char *);\n";
4975 Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *class_getSuperclass";
4976 Preamble += "(struct objc_class *);\n";
4977 Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_getMetaClass";
4978 Preamble += "(const char *);\n";
4979 Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_throw(struct objc_object *);\n";
4980 Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_try_enter(void *);\n";
4981 Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_try_exit(void *);\n";
4982 Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_exception_extract(void *);\n";
4983 Preamble += "__OBJC_RW_DLLIMPORT int objc_exception_match";
4984 Preamble += "(struct objc_class *, struct objc_object *);\n";
4985 // @synchronized hooks.
4986 Preamble += "__OBJC_RW_DLLIMPORT int objc_sync_enter(struct objc_object *);\n";
4987 Preamble += "__OBJC_RW_DLLIMPORT int objc_sync_exit(struct objc_object *);\n";
4988 Preamble += "__OBJC_RW_DLLIMPORT Protocol *objc_getProtocol(const char *);\n";
4989 Preamble += "#ifndef __FASTENUMERATIONSTATE\n";
4990 Preamble += "struct __objcFastEnumerationState {\n\t";
4991 Preamble += "unsigned long state;\n\t";
4992 Preamble += "void **itemsPtr;\n\t";
4993 Preamble += "unsigned long *mutationsPtr;\n\t";
4994 Preamble += "unsigned long extra[5];\n};\n";
4995 Preamble += "__OBJC_RW_DLLIMPORT void objc_enumerationMutation(struct objc_object *);\n";
4996 Preamble += "#define __FASTENUMERATIONSTATE\n";
4997 Preamble += "#endif\n";
4998 Preamble += "#ifndef __NSCONSTANTSTRINGIMPL\n";
4999 Preamble += "struct __NSConstantStringImpl {\n";
5000 Preamble += " int *isa;\n";
5001 Preamble += " int flags;\n";
5002 Preamble += " char *str;\n";
5003 Preamble += " long length;\n";
5004 Preamble += "};\n";
5005 Preamble += "#ifdef CF_EXPORT_CONSTANT_STRING\n";
5006 Preamble += "extern \"C\" __declspec(dllexport) int __CFConstantStringClassReference[];\n";
5007 Preamble += "#else\n";
5008 Preamble += "__OBJC_RW_DLLIMPORT int __CFConstantStringClassReference[];\n";
5009 Preamble += "#endif\n";
5010 Preamble += "#define __NSCONSTANTSTRINGIMPL\n";
5011 Preamble += "#endif\n";
5012 // Blocks preamble.
5013 Preamble += "#ifndef BLOCK_IMPL\n";
5014 Preamble += "#define BLOCK_IMPL\n";
5015 Preamble += "struct __block_impl {\n";
5016 Preamble += " void *isa;\n";
5017 Preamble += " int Flags;\n";
5018 Preamble += " int Reserved;\n";
5019 Preamble += " void *FuncPtr;\n";
5020 Preamble += "};\n";
5021 Preamble += "// Runtime copy/destroy helper functions (from Block_private.h)\n";
5022 Preamble += "#ifdef __OBJC_EXPORT_BLOCKS\n";
5023 Preamble += "extern \"C\" __declspec(dllexport) "
5024 "void _Block_object_assign(void *, const void *, const int);\n";
5025 Preamble += "extern \"C\" __declspec(dllexport) void _Block_object_dispose(const void *, const int);\n";
5026 Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteGlobalBlock[32];\n";
5027 Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteStackBlock[32];\n";
5028 Preamble += "#else\n";
5029 Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_assign(void *, const void *, const int);\n";
5030 Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_dispose(const void *, const int);\n";
5031 Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteGlobalBlock[32];\n";
5032 Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteStackBlock[32];\n";
5033 Preamble += "#endif\n";
5034 Preamble += "#endif\n";
5035 if (LangOpts.MicrosoftExt) {
5036 Preamble += "#undef __OBJC_RW_DLLIMPORT\n";
5037 Preamble += "#undef __OBJC_RW_STATICIMPORT\n";
5038 Preamble += "#ifndef KEEP_ATTRIBUTES\n"; // We use this for clang tests.
5039 Preamble += "#define __attribute__(X)\n";
5040 Preamble += "#endif\n";
5041 Preamble += "#define __weak\n";
5042 }
5043 else {
5044 Preamble += "#define __block\n";
5045 Preamble += "#define __weak\n";
5046 }
5047 // NOTE! Windows uses LLP64 for 64bit mode. So, cast pointer to long long
5048 // as this avoids warning in any 64bit/32bit compilation model.
5049 Preamble += "\n#define __OFFSETOFIVAR__(TYPE, MEMBER) ((long long) &((TYPE *)0)->MEMBER)\n";
5050 }
5051
5052 /// RewriteIvarOffsetComputation - This routine synthesizes computation of
5053 /// ivar offset.
5054 void RewriteObjCFragileABI::RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
5055 std::string &Result) {
5056 if (ivar->isBitField()) {
5057 // FIXME: The hack below doesn't work for bitfields. For now, we simply
5058 // place all bitfields at offset 0.
5059 Result += "0";
5060 } else {
5061 Result += "__OFFSETOFIVAR__(struct ";
5062 Result += ivar->getContainingInterface()->getNameAsString();
5063 if (LangOpts.MicrosoftExt)
5064 Result += "_IMPL";
5065 Result += ", ";
5066 Result += ivar->getNameAsString();
5067 Result += ")";
5068 }
5069 }
5070
5071 /// RewriteObjCProtocolMetaData - Rewrite protocols meta-data.
5072 void RewriteObjCFragileABI::RewriteObjCProtocolMetaData(
5073 ObjCProtocolDecl *PDecl, StringRef prefix,
5074 StringRef ClassName, std::string &Result) {
5075 static bool objc_protocol_methods = false;
5076
5077 // Output struct protocol_methods holder of method selector and type.
5078 if (!objc_protocol_methods && PDecl->hasDefinition()) {
5079 /* struct protocol_methods {
5080 SEL _cmd;
5081 char *method_types;
5082 }
5083 */
5084 Result += "\nstruct _protocol_methods {\n";
5085 Result += "\tstruct objc_selector *_cmd;\n";
5086 Result += "\tchar *method_types;\n";
5087 Result += "};\n";
5088
5089 objc_protocol_methods = true;
5090 }
5091 // Do not synthesize the protocol more than once.
5092 if (ObjCSynthesizedProtocols.count(PDecl->getCanonicalDecl()))
5093 return;
5094
5095 if (ObjCProtocolDecl *Def = PDecl->getDefinition())
5096 PDecl = Def;
5097
5098 if (PDecl->instmeth_begin() != PDecl->instmeth_end()) {
5099 unsigned NumMethods = std::distance(PDecl->instmeth_begin(),
5100 PDecl->instmeth_end());
5101 /* struct _objc_protocol_method_list {
5102 int protocol_method_count;
5103 struct protocol_methods protocols[];
5104 }
5105 */
5106 Result += "\nstatic struct {\n";
5107 Result += "\tint protocol_method_count;\n";
5108 Result += "\tstruct _protocol_methods protocol_methods[";
5109 Result += utostr(NumMethods);
5110 Result += "];\n} _OBJC_PROTOCOL_INSTANCE_METHODS_";
5111 Result += PDecl->getNameAsString();
5112 Result += " __attribute__ ((used, section (\"__OBJC, __cat_inst_meth\")))= "
5113 "{\n\t" + utostr(NumMethods) + "\n";
5114
5115 // Output instance methods declared in this protocol.
5116 for (ObjCProtocolDecl::instmeth_iterator
5117 I = PDecl->instmeth_begin(), E = PDecl->instmeth_end();
5118 I != E; ++I) {
5119 if (I == PDecl->instmeth_begin())
5120 Result += "\t ,{{(struct objc_selector *)\"";
5121 else
5122 Result += "\t ,{(struct objc_selector *)\"";
5123 Result += (*I)->getSelector().getAsString();
5124 std::string MethodTypeString = Context->getObjCEncodingForMethodDecl(*I);
5125 Result += "\", \"";
5126 Result += MethodTypeString;
5127 Result += "\"}\n";
5128 }
5129 Result += "\t }\n};\n";
5130 }
5131
5132 // Output class methods declared in this protocol.
5133 unsigned NumMethods = std::distance(PDecl->classmeth_begin(),
5134 PDecl->classmeth_end());
5135 if (NumMethods > 0) {
5136 /* struct _objc_protocol_method_list {
5137 int protocol_method_count;
5138 struct protocol_methods protocols[];
5139 }
5140 */
5141 Result += "\nstatic struct {\n";
5142 Result += "\tint protocol_method_count;\n";
5143 Result += "\tstruct _protocol_methods protocol_methods[";
5144 Result += utostr(NumMethods);
5145 Result += "];\n} _OBJC_PROTOCOL_CLASS_METHODS_";
5146 Result += PDecl->getNameAsString();
5147 Result += " __attribute__ ((used, section (\"__OBJC, __cat_cls_meth\")))= "
5148 "{\n\t";
5149 Result += utostr(NumMethods);
5150 Result += "\n";
5151
5152 // Output instance methods declared in this protocol.
5153 for (ObjCProtocolDecl::classmeth_iterator
5154 I = PDecl->classmeth_begin(), E = PDecl->classmeth_end();
5155 I != E; ++I) {
5156 if (I == PDecl->classmeth_begin())
5157 Result += "\t ,{{(struct objc_selector *)\"";
5158 else
5159 Result += "\t ,{(struct objc_selector *)\"";
5160 Result += (*I)->getSelector().getAsString();
5161 std::string MethodTypeString = Context->getObjCEncodingForMethodDecl(*I);
5162 Result += "\", \"";
5163 Result += MethodTypeString;
5164 Result += "\"}\n";
5165 }
5166 Result += "\t }\n};\n";
5167 }
5168
5169 // Output:
5170 /* struct _objc_protocol {
5171 // Objective-C 1.0 extensions
5172 struct _objc_protocol_extension *isa;
5173 char *protocol_name;
5174 struct _objc_protocol **protocol_list;
5175 struct _objc_protocol_method_list *instance_methods;
5176 struct _objc_protocol_method_list *class_methods;
5177 };
5178 */
5179 static bool objc_protocol = false;
5180 if (!objc_protocol) {
5181 Result += "\nstruct _objc_protocol {\n";
5182 Result += "\tstruct _objc_protocol_extension *isa;\n";
5183 Result += "\tchar *protocol_name;\n";
5184 Result += "\tstruct _objc_protocol **protocol_list;\n";
5185 Result += "\tstruct _objc_protocol_method_list *instance_methods;\n";
5186 Result += "\tstruct _objc_protocol_method_list *class_methods;\n";
5187 Result += "};\n";
5188
5189 objc_protocol = true;
5190 }
5191
5192 Result += "\nstatic struct _objc_protocol _OBJC_PROTOCOL_";
5193 Result += PDecl->getNameAsString();
5194 Result += " __attribute__ ((used, section (\"__OBJC, __protocol\")))= "
5195 "{\n\t0, \"";
5196 Result += PDecl->getNameAsString();
5197 Result += "\", 0, ";
5198 if (PDecl->instmeth_begin() != PDecl->instmeth_end()) {
5199 Result += "(struct _objc_protocol_method_list *)&_OBJC_PROTOCOL_INSTANCE_METHODS_";
5200 Result += PDecl->getNameAsString();
5201 Result += ", ";
5202 }
5203 else
5204 Result += "0, ";
5205 if (PDecl->classmeth_begin() != PDecl->classmeth_end()) {
5206 Result += "(struct _objc_protocol_method_list *)&_OBJC_PROTOCOL_CLASS_METHODS_";
5207 Result += PDecl->getNameAsString();
5208 Result += "\n";
5209 }
5210 else
5211 Result += "0\n";
5212 Result += "};\n";
5213
5214 // Mark this protocol as having been generated.
5215 if (!ObjCSynthesizedProtocols.insert(PDecl->getCanonicalDecl()).second)
5216 llvm_unreachable("protocol already synthesized");
5217 }
5218
5219 void RewriteObjCFragileABI::RewriteObjCProtocolListMetaData(
5220 const ObjCList<ObjCProtocolDecl> &Protocols,
5221 StringRef prefix, StringRef ClassName,
5222 std::string &Result) {
5223 if (Protocols.empty()) return;
5224
5225 for (unsigned i = 0; i != Protocols.size(); i++)
5226 RewriteObjCProtocolMetaData(Protocols[i], prefix, ClassName, Result);
5227
5228 // Output the top lovel protocol meta-data for the class.
5229 /* struct _objc_protocol_list {
5230 struct _objc_protocol_list *next;
5231 int protocol_count;
5232 struct _objc_protocol *class_protocols[];
5233 }
5234 */
5235 Result += "\nstatic struct {\n";
5236 Result += "\tstruct _objc_protocol_list *next;\n";
5237 Result += "\tint protocol_count;\n";
5238 Result += "\tstruct _objc_protocol *class_protocols[";
5239 Result += utostr(Protocols.size());
5240 Result += "];\n} _OBJC_";
5241 Result += prefix;
5242 Result += "_PROTOCOLS_";
5243 Result += ClassName;
5244 Result += " __attribute__ ((used, section (\"__OBJC, __cat_cls_meth\")))= "
5245 "{\n\t0, ";
5246 Result += utostr(Protocols.size());
5247 Result += "\n";
5248
5249 Result += "\t,{&_OBJC_PROTOCOL_";
5250 Result += Protocols[0]->getNameAsString();
5251 Result += " \n";
5252
5253 for (unsigned i = 1; i != Protocols.size(); i++) {
5254 Result += "\t ,&_OBJC_PROTOCOL_";
5255 Result += Protocols[i]->getNameAsString();
5256 Result += "\n";
5257 }
5258 Result += "\t }\n};\n";
5259 }
5260
5261 void RewriteObjCFragileABI::RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
5262 std::string &Result) {
5263 ObjCInterfaceDecl *CDecl = IDecl->getClassInterface();
5264
5265 // Explicitly declared @interface's are already synthesized.
5266 if (CDecl->isImplicitInterfaceDecl()) {
5267 // FIXME: Implementation of a class with no @interface (legacy) does not
5268 // produce correct synthesis as yet.
5269 RewriteObjCInternalStruct(CDecl, Result);
5270 }
5271
5272 // Build _objc_ivar_list metadata for classes ivars if needed
5273 unsigned NumIvars = !IDecl->ivar_empty()
5274 ? IDecl->ivar_size()
5275 : (CDecl ? CDecl->ivar_size() : 0);
5276 if (NumIvars > 0) {
5277 static bool objc_ivar = false;
5278 if (!objc_ivar) {
5279 /* struct _objc_ivar {
5280 char *ivar_name;
5281 char *ivar_type;
5282 int ivar_offset;
5283 };
5284 */
5285 Result += "\nstruct _objc_ivar {\n";
5286 Result += "\tchar *ivar_name;\n";
5287 Result += "\tchar *ivar_type;\n";
5288 Result += "\tint ivar_offset;\n";
5289 Result += "};\n";
5290
5291 objc_ivar = true;
5292 }
5293
5294 /* struct {
5295 int ivar_count;
5296 struct _objc_ivar ivar_list[nIvars];
5297 };
5298 */
5299 Result += "\nstatic struct {\n";
5300 Result += "\tint ivar_count;\n";
5301 Result += "\tstruct _objc_ivar ivar_list[";
5302 Result += utostr(NumIvars);
5303 Result += "];\n} _OBJC_INSTANCE_VARIABLES_";
5304 Result += IDecl->getNameAsString();
5305 Result += " __attribute__ ((used, section (\"__OBJC, __instance_vars\")))= "
5306 "{\n\t";
5307 Result += utostr(NumIvars);
5308 Result += "\n";
5309
5310 ObjCInterfaceDecl::ivar_iterator IVI, IVE;
5311 SmallVector<ObjCIvarDecl *, 8> IVars;
5312 if (!IDecl->ivar_empty()) {
5313 for (auto *IV : IDecl->ivars())
5314 IVars.push_back(IV);
5315 IVI = IDecl->ivar_begin();
5316 IVE = IDecl->ivar_end();
5317 } else {
5318 IVI = CDecl->ivar_begin();
5319 IVE = CDecl->ivar_end();
5320 }
5321 Result += "\t,{{\"";
5322 Result += IVI->getNameAsString();
5323 Result += "\", \"";
5324 std::string TmpString, StrEncoding;
5325 Context->getObjCEncodingForType(IVI->getType(), TmpString, *IVI);
5326 QuoteDoublequotes(TmpString, StrEncoding);
5327 Result += StrEncoding;
5328 Result += "\", ";
5329 RewriteIvarOffsetComputation(*IVI, Result);
5330 Result += "}\n";
5331 for (++IVI; IVI != IVE; ++IVI) {
5332 Result += "\t ,{\"";
5333 Result += IVI->getNameAsString();
5334 Result += "\", \"";
5335 std::string TmpString, StrEncoding;
5336 Context->getObjCEncodingForType(IVI->getType(), TmpString, *IVI);
5337 QuoteDoublequotes(TmpString, StrEncoding);
5338 Result += StrEncoding;
5339 Result += "\", ";
5340 RewriteIvarOffsetComputation(*IVI, Result);
5341 Result += "}\n";
5342 }
5343
5344 Result += "\t }\n};\n";
5345 }
5346
5347 // Build _objc_method_list for class's instance methods if needed
5348 SmallVector<ObjCMethodDecl *, 32> InstanceMethods(IDecl->instance_methods());
5349
5350 // If any of our property implementations have associated getters or
5351 // setters, produce metadata for them as well.
5352 for (const auto *Prop : IDecl->property_impls()) {
5353 if (Prop->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
5354 continue;
5355 if (!Prop->getPropertyIvarDecl())
5356 continue;
5357 ObjCPropertyDecl *PD = Prop->getPropertyDecl();
5358 if (!PD)
5359 continue;
5360 if (ObjCMethodDecl *Getter = PD->getGetterMethodDecl())
5361 if (!Getter->isDefined())
5362 InstanceMethods.push_back(Getter);
5363 if (PD->isReadOnly())
5364 continue;
5365 if (ObjCMethodDecl *Setter = PD->getSetterMethodDecl())
5366 if (!Setter->isDefined())
5367 InstanceMethods.push_back(Setter);
5368 }
5369 RewriteObjCMethodsMetaData(InstanceMethods.begin(), InstanceMethods.end(),
5370 true, "", IDecl->getName(), Result);
5371
5372 // Build _objc_method_list for class's class methods if needed
5373 RewriteObjCMethodsMetaData(IDecl->classmeth_begin(), IDecl->classmeth_end(),
5374 false, "", IDecl->getName(), Result);
5375
5376 // Protocols referenced in class declaration?
5377 RewriteObjCProtocolListMetaData(CDecl->getReferencedProtocols(),
5378 "CLASS", CDecl->getName(), Result);
5379
5380 // Declaration of class/meta-class metadata
5381 /* struct _objc_class {
5382 struct _objc_class *isa; // or const char *root_class_name when metadata
5383 const char *super_class_name;
5384 char *name;
5385 long version;
5386 long info;
5387 long instance_size;
5388 struct _objc_ivar_list *ivars;
5389 struct _objc_method_list *methods;
5390 struct objc_cache *cache;
5391 struct objc_protocol_list *protocols;
5392 const char *ivar_layout;
5393 struct _objc_class_ext *ext;
5394 };
5395 */
5396 static bool objc_class = false;
5397 if (!objc_class) {
5398 Result += "\nstruct _objc_class {\n";
5399 Result += "\tstruct _objc_class *isa;\n";
5400 Result += "\tconst char *super_class_name;\n";
5401 Result += "\tchar *name;\n";
5402 Result += "\tlong version;\n";
5403 Result += "\tlong info;\n";
5404 Result += "\tlong instance_size;\n";
5405 Result += "\tstruct _objc_ivar_list *ivars;\n";
5406 Result += "\tstruct _objc_method_list *methods;\n";
5407 Result += "\tstruct objc_cache *cache;\n";
5408 Result += "\tstruct _objc_protocol_list *protocols;\n";
5409 Result += "\tconst char *ivar_layout;\n";
5410 Result += "\tstruct _objc_class_ext *ext;\n";
5411 Result += "};\n";
5412 objc_class = true;
5413 }
5414
5415 // Meta-class metadata generation.
5416 ObjCInterfaceDecl *RootClass = nullptr;
5417 ObjCInterfaceDecl *SuperClass = CDecl->getSuperClass();
5418 while (SuperClass) {
5419 RootClass = SuperClass;
5420 SuperClass = SuperClass->getSuperClass();
5421 }
5422 SuperClass = CDecl->getSuperClass();
5423
5424 Result += "\nstatic struct _objc_class _OBJC_METACLASS_";
5425 Result += CDecl->getNameAsString();
5426 Result += " __attribute__ ((used, section (\"__OBJC, __meta_class\")))= "
5427 "{\n\t(struct _objc_class *)\"";
5428 Result += (RootClass ? RootClass->getNameAsString() : CDecl->getNameAsString());
5429 Result += "\"";
5430
5431 if (SuperClass) {
5432 Result += ", \"";
5433 Result += SuperClass->getNameAsString();
5434 Result += "\", \"";
5435 Result += CDecl->getNameAsString();
5436 Result += "\"";
5437 }
5438 else {
5439 Result += ", 0, \"";
5440 Result += CDecl->getNameAsString();
5441 Result += "\"";
5442 }
5443 // Set 'ivars' field for root class to 0. ObjC1 runtime does not use it.
5444 // 'info' field is initialized to CLS_META(2) for metaclass
5445 Result += ", 0,2, sizeof(struct _objc_class), 0";
5446 if (IDecl->classmeth_begin() != IDecl->classmeth_end()) {
5447 Result += "\n\t, (struct _objc_method_list *)&_OBJC_CLASS_METHODS_";
5448 Result += IDecl->getNameAsString();
5449 Result += "\n";
5450 }
5451 else
5452 Result += ", 0\n";
5453 if (CDecl->protocol_begin() != CDecl->protocol_end()) {
5454 Result += "\t,0, (struct _objc_protocol_list *)&_OBJC_CLASS_PROTOCOLS_";
5455 Result += CDecl->getNameAsString();
5456 Result += ",0,0\n";
5457 }
5458 else
5459 Result += "\t,0,0,0,0\n";
5460 Result += "};\n";
5461
5462 // class metadata generation.
5463 Result += "\nstatic struct _objc_class _OBJC_CLASS_";
5464 Result += CDecl->getNameAsString();
5465 Result += " __attribute__ ((used, section (\"__OBJC, __class\")))= "
5466 "{\n\t&_OBJC_METACLASS_";
5467 Result += CDecl->getNameAsString();
5468 if (SuperClass) {
5469 Result += ", \"";
5470 Result += SuperClass->getNameAsString();
5471 Result += "\", \"";
5472 Result += CDecl->getNameAsString();
5473 Result += "\"";
5474 }
5475 else {
5476 Result += ", 0, \"";
5477 Result += CDecl->getNameAsString();
5478 Result += "\"";
5479 }
5480 // 'info' field is initialized to CLS_CLASS(1) for class
5481 Result += ", 0,1";
5482 if (!ObjCSynthesizedStructs.count(CDecl))
5483 Result += ",0";
5484 else {
5485 // class has size. Must synthesize its size.
5486 Result += ",sizeof(struct ";
5487 Result += CDecl->getNameAsString();
5488 if (LangOpts.MicrosoftExt)
5489 Result += "_IMPL";
5490 Result += ")";
5491 }
5492 if (NumIvars > 0) {
5493 Result += ", (struct _objc_ivar_list *)&_OBJC_INSTANCE_VARIABLES_";
5494 Result += CDecl->getNameAsString();
5495 Result += "\n\t";
5496 }
5497 else
5498 Result += ",0";
5499 if (IDecl->instmeth_begin() != IDecl->instmeth_end()) {
5500 Result += ", (struct _objc_method_list *)&_OBJC_INSTANCE_METHODS_";
5501 Result += CDecl->getNameAsString();
5502 Result += ", 0\n\t";
5503 }
5504 else
5505 Result += ",0,0";
5506 if (CDecl->protocol_begin() != CDecl->protocol_end()) {
5507 Result += ", (struct _objc_protocol_list*)&_OBJC_CLASS_PROTOCOLS_";
5508 Result += CDecl->getNameAsString();
5509 Result += ", 0,0\n";
5510 }
5511 else
5512 Result += ",0,0,0\n";
5513 Result += "};\n";
5514 }
5515
5516 void RewriteObjCFragileABI::RewriteMetaDataIntoBuffer(std::string &Result) {
5517 int ClsDefCount = ClassImplementation.size();
5518 int CatDefCount = CategoryImplementation.size();
5519
5520 // For each implemented class, write out all its meta data.
5521 for (int i = 0; i < ClsDefCount; i++)
5522 RewriteObjCClassMetaData(ClassImplementation[i], Result);
5523
5524 // For each implemented category, write out all its meta data.
5525 for (int i = 0; i < CatDefCount; i++)
5526 RewriteObjCCategoryImplDecl(CategoryImplementation[i], Result);
5527
5528 // Write objc_symtab metadata
5529 /*
5530 struct _objc_symtab
5531 {
5532 long sel_ref_cnt;
5533 SEL *refs;
5534 short cls_def_cnt;
5535 short cat_def_cnt;
5536 void *defs[cls_def_cnt + cat_def_cnt];
5537 };
5538 */
5539
5540 Result += "\nstruct _objc_symtab {\n";
5541 Result += "\tlong sel_ref_cnt;\n";
5542 Result += "\tSEL *refs;\n";
5543 Result += "\tshort cls_def_cnt;\n";
5544 Result += "\tshort cat_def_cnt;\n";
5545 Result += "\tvoid *defs[" + utostr(ClsDefCount + CatDefCount)+ "];\n";
5546 Result += "};\n\n";
5547
5548 Result += "static struct _objc_symtab "
5549 "_OBJC_SYMBOLS __attribute__((used, section (\"__OBJC, __symbols\")))= {\n";
5550 Result += "\t0, 0, " + utostr(ClsDefCount)
5551 + ", " + utostr(CatDefCount) + "\n";
5552 for (int i = 0; i < ClsDefCount; i++) {
5553 Result += "\t,&_OBJC_CLASS_";
5554 Result += ClassImplementation[i]->getNameAsString();
5555 Result += "\n";
5556 }
5557
5558 for (int i = 0; i < CatDefCount; i++) {
5559 Result += "\t,&_OBJC_CATEGORY_";
5560 Result += CategoryImplementation[i]->getClassInterface()->getNameAsString();
5561 Result += "_";
5562 Result += CategoryImplementation[i]->getNameAsString();
5563 Result += "\n";
5564 }
5565
5566 Result += "};\n\n";
5567
5568 // Write objc_module metadata
5569
5570 /*
5571 struct _objc_module {
5572 long version;
5573 long size;
5574 const char *name;
5575 struct _objc_symtab *symtab;
5576 }
5577 */
5578
5579 Result += "\nstruct _objc_module {\n";
5580 Result += "\tlong version;\n";
5581 Result += "\tlong size;\n";
5582 Result += "\tconst char *name;\n";
5583 Result += "\tstruct _objc_symtab *symtab;\n";
5584 Result += "};\n\n";
5585 Result += "static struct _objc_module "
5586 "_OBJC_MODULES __attribute__ ((used, section (\"__OBJC, __module_info\")))= {\n";
5587 Result += "\t" + utostr(OBJC_ABI_VERSION) +
5588 ", sizeof(struct _objc_module), \"\", &_OBJC_SYMBOLS\n";
5589 Result += "};\n\n";
5590
5591 if (LangOpts.MicrosoftExt) {
5592 if (ProtocolExprDecls.size()) {
5593 Result += "#pragma section(\".objc_protocol$B\",long,read,write)\n";
5594 Result += "#pragma data_seg(push, \".objc_protocol$B\")\n";
5595 for (ObjCProtocolDecl *ProtDecl : ProtocolExprDecls) {
5596 Result += "static struct _objc_protocol *_POINTER_OBJC_PROTOCOL_";
5597 Result += ProtDecl->getNameAsString();
5598 Result += " = &_OBJC_PROTOCOL_";
5599 Result += ProtDecl->getNameAsString();
5600 Result += ";\n";
5601 }
5602 Result += "#pragma data_seg(pop)\n\n";
5603 }
5604 Result += "#pragma section(\".objc_module_info$B\",long,read,write)\n";
5605 Result += "#pragma data_seg(push, \".objc_module_info$B\")\n";
5606 Result += "static struct _objc_module *_POINTER_OBJC_MODULES = ";
5607 Result += "&_OBJC_MODULES;\n";
5608 Result += "#pragma data_seg(pop)\n\n";
5609 }
5610 }
5611
5612 /// RewriteObjCCategoryImplDecl - Rewrite metadata for each category
5613 /// implementation.
5614 void RewriteObjCFragileABI::RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *IDecl,
5615 std::string &Result) {
5616 ObjCInterfaceDecl *ClassDecl = IDecl->getClassInterface();
5617 // Find category declaration for this implementation.
5618 ObjCCategoryDecl *CDecl
5619 = ClassDecl->FindCategoryDeclaration(IDecl->getIdentifier());
5620
5621 std::string FullCategoryName = ClassDecl->getNameAsString();
5622 FullCategoryName += '_';
5623 FullCategoryName += IDecl->getNameAsString();
5624
5625 // Build _objc_method_list for class's instance methods if needed
5626 SmallVector<ObjCMethodDecl *, 32> InstanceMethods(IDecl->instance_methods());
5627
5628 // If any of our property implementations have associated getters or
5629 // setters, produce metadata for them as well.
5630 for (const auto *Prop : IDecl->property_impls()) {
5631 if (Prop->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
5632 continue;
5633 if (!Prop->getPropertyIvarDecl())
5634 continue;
5635 ObjCPropertyDecl *PD = Prop->getPropertyDecl();
5636 if (!PD)
5637 continue;
5638 if (ObjCMethodDecl *Getter = PD->getGetterMethodDecl())
5639 InstanceMethods.push_back(Getter);
5640 if (PD->isReadOnly())
5641 continue;
5642 if (ObjCMethodDecl *Setter = PD->getSetterMethodDecl())
5643 InstanceMethods.push_back(Setter);
5644 }
5645 RewriteObjCMethodsMetaData(InstanceMethods.begin(), InstanceMethods.end(),
5646 true, "CATEGORY_", FullCategoryName, Result);
5647
5648 // Build _objc_method_list for class's class methods if needed
5649 RewriteObjCMethodsMetaData(IDecl->classmeth_begin(), IDecl->classmeth_end(),
5650 false, "CATEGORY_", FullCategoryName, Result);
5651
5652 // Protocols referenced in class declaration?
5653 // Null CDecl is case of a category implementation with no category interface
5654 if (CDecl)
5655 RewriteObjCProtocolListMetaData(CDecl->getReferencedProtocols(), "CATEGORY",
5656 FullCategoryName, Result);
5657 /* struct _objc_category {
5658 char *category_name;
5659 char *class_name;
5660 struct _objc_method_list *instance_methods;
5661 struct _objc_method_list *class_methods;
5662 struct _objc_protocol_list *protocols;
5663 // Objective-C 1.0 extensions
5664 uint32_t size; // sizeof (struct _objc_category)
5665 struct _objc_property_list *instance_properties; // category's own
5666 // @property decl.
5667 };
5668 */
5669
5670 static bool objc_category = false;
5671 if (!objc_category) {
5672 Result += "\nstruct _objc_category {\n";
5673 Result += "\tchar *category_name;\n";
5674 Result += "\tchar *class_name;\n";
5675 Result += "\tstruct _objc_method_list *instance_methods;\n";
5676 Result += "\tstruct _objc_method_list *class_methods;\n";
5677 Result += "\tstruct _objc_protocol_list *protocols;\n";
5678 Result += "\tunsigned int size;\n";
5679 Result += "\tstruct _objc_property_list *instance_properties;\n";
5680 Result += "};\n";
5681 objc_category = true;
5682 }
5683 Result += "\nstatic struct _objc_category _OBJC_CATEGORY_";
5684 Result += FullCategoryName;
5685 Result += " __attribute__ ((used, section (\"__OBJC, __category\")))= {\n\t\"";
5686 Result += IDecl->getNameAsString();
5687 Result += "\"\n\t, \"";
5688 Result += ClassDecl->getNameAsString();
5689 Result += "\"\n";
5690
5691 if (IDecl->instmeth_begin() != IDecl->instmeth_end()) {
5692 Result += "\t, (struct _objc_method_list *)"
5693 "&_OBJC_CATEGORY_INSTANCE_METHODS_";
5694 Result += FullCategoryName;
5695 Result += "\n";
5696 }
5697 else
5698 Result += "\t, 0\n";
5699 if (IDecl->classmeth_begin() != IDecl->classmeth_end()) {
5700 Result += "\t, (struct _objc_method_list *)"
5701 "&_OBJC_CATEGORY_CLASS_METHODS_";
5702 Result += FullCategoryName;
5703 Result += "\n";
5704 }
5705 else
5706 Result += "\t, 0\n";
5707
5708 if (CDecl && CDecl->protocol_begin() != CDecl->protocol_end()) {
5709 Result += "\t, (struct _objc_protocol_list *)&_OBJC_CATEGORY_PROTOCOLS_";
5710 Result += FullCategoryName;
5711 Result += "\n";
5712 }
5713 else
5714 Result += "\t, 0\n";
5715 Result += "\t, sizeof(struct _objc_category), 0\n};\n";
5716 }
5717
5718 // RewriteObjCMethodsMetaData - Rewrite methods metadata for instance or
5719 /// class methods.
5720 template<typename MethodIterator>
5721 void RewriteObjCFragileABI::RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
5722 MethodIterator MethodEnd,
5723 bool IsInstanceMethod,
5724 StringRef prefix,
5725 StringRef ClassName,
5726 std::string &Result) {
5727 if (MethodBegin == MethodEnd) return;
5728
5729 if (!objc_impl_method) {
5730 /* struct _objc_method {
5731 SEL _cmd;
5732 char *method_types;
5733 void *_imp;
5734 }
5735 */
5736 Result += "\nstruct _objc_method {\n";
5737 Result += "\tSEL _cmd;\n";
5738 Result += "\tchar *method_types;\n";
5739 Result += "\tvoid *_imp;\n";
5740 Result += "};\n";
5741
5742 objc_impl_method = true;
5743 }
5744
5745 // Build _objc_method_list for class's methods if needed
5746
5747 /* struct {
5748 struct _objc_method_list *next_method;
5749 int method_count;
5750 struct _objc_method method_list[];
5751 }
5752 */
5753 unsigned NumMethods = std::distance(MethodBegin, MethodEnd);
5754 Result += "\nstatic struct {\n";
5755 Result += "\tstruct _objc_method_list *next_method;\n";
5756 Result += "\tint method_count;\n";
5757 Result += "\tstruct _objc_method method_list[";
5758 Result += utostr(NumMethods);
5759 Result += "];\n} _OBJC_";
5760 Result += prefix;
5761 Result += IsInstanceMethod ? "INSTANCE" : "CLASS";
5762 Result += "_METHODS_";
5763 Result += ClassName;
5764 Result += " __attribute__ ((used, section (\"__OBJC, __";
5765 Result += IsInstanceMethod ? "inst" : "cls";
5766 Result += "_meth\")))= ";
5767 Result += "{\n\t0, " + utostr(NumMethods) + "\n";
5768
5769 Result += "\t,{{(SEL)\"";
5770 Result += (*MethodBegin)->getSelector().getAsString();
5771 std::string MethodTypeString =
5772 Context->getObjCEncodingForMethodDecl(*MethodBegin);
5773 Result += "\", \"";
5774 Result += MethodTypeString;
5775 Result += "\", (void *)";
5776 Result += MethodInternalNames[*MethodBegin];
5777 Result += "}\n";
5778 for (++MethodBegin; MethodBegin != MethodEnd; ++MethodBegin) {
5779 Result += "\t ,{(SEL)\"";
5780 Result += (*MethodBegin)->getSelector().getAsString();
5781 std::string MethodTypeString =
5782 Context->getObjCEncodingForMethodDecl(*MethodBegin);
5783 Result += "\", \"";
5784 Result += MethodTypeString;
5785 Result += "\", (void *)";
5786 Result += MethodInternalNames[*MethodBegin];
5787 Result += "}\n";
5788 }
5789 Result += "\t }\n};\n";
5790 }
5791
5792 Stmt *RewriteObjCFragileABI::RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV) {
5793 SourceRange OldRange = IV->getSourceRange();
5794 Expr *BaseExpr = IV->getBase();
5795
5796 // Rewrite the base, but without actually doing replaces.
5797 {
5798 DisableReplaceStmtScope S(*this);
5799 BaseExpr = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(BaseExpr));
5800 IV->setBase(BaseExpr);
5801 }
5802
5803 ObjCIvarDecl *D = IV->getDecl();
5804
5805 Expr *Replacement = IV;
5806 if (CurMethodDef) {
5807 if (BaseExpr->getType()->isObjCObjectPointerType()) {
5808 const ObjCInterfaceType *iFaceDecl =
5809 dyn_cast<ObjCInterfaceType>(BaseExpr->getType()->getPointeeType());
5810 assert(iFaceDecl && "RewriteObjCIvarRefExpr - iFaceDecl is null");
5811 // lookup which class implements the instance variable.
5812 ObjCInterfaceDecl *clsDeclared = nullptr;
5813 iFaceDecl->getDecl()->lookupInstanceVariable(D->getIdentifier(),
5814 clsDeclared);
5815 assert(clsDeclared && "RewriteObjCIvarRefExpr(): Can't find class");
5816
5817 // Synthesize an explicit cast to gain access to the ivar.
5818 std::string RecName = clsDeclared->getIdentifier()->getName();
5819 RecName += "_IMPL";
5820 IdentifierInfo *II = &Context->Idents.get(RecName);
5821 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
5822 SourceLocation(), SourceLocation(),
5823 II);
5824 assert(RD && "RewriteObjCIvarRefExpr(): Can't find RecordDecl");
5825 QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
5826 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, castT,
5827 CK_BitCast,
5828 IV->getBase());
5829 // Don't forget the parens to enforce the proper binding.
5830 ParenExpr *PE = new (Context) ParenExpr(OldRange.getBegin(),
5831 OldRange.getEnd(),
5832 castExpr);
5833 if (IV->isFreeIvar() &&
5834 declaresSameEntity(CurMethodDef->getClassInterface(), iFaceDecl->getDecl())) {
5835 MemberExpr *ME = new (Context)
5836 MemberExpr(PE, true, SourceLocation(), D, IV->getLocation(),
5837 D->getType(), VK_LValue, OK_Ordinary);
5838 Replacement = ME;
5839 } else {
5840 IV->setBase(PE);
5841 }
5842 }
5843 } else { // we are outside a method.
5844 assert(!IV->isFreeIvar() && "Cannot have a free standing ivar outside a method");
5845
5846 // Explicit ivar refs need to have a cast inserted.
5847 // FIXME: consider sharing some of this code with the code above.
5848 if (BaseExpr->getType()->isObjCObjectPointerType()) {
5849 const ObjCInterfaceType *iFaceDecl =
5850 dyn_cast<ObjCInterfaceType>(BaseExpr->getType()->getPointeeType());
5851 // lookup which class implements the instance variable.
5852 ObjCInterfaceDecl *clsDeclared = nullptr;
5853 iFaceDecl->getDecl()->lookupInstanceVariable(D->getIdentifier(),
5854 clsDeclared);
5855 assert(clsDeclared && "RewriteObjCIvarRefExpr(): Can't find class");
5856
5857 // Synthesize an explicit cast to gain access to the ivar.
5858 std::string RecName = clsDeclared->getIdentifier()->getName();
5859 RecName += "_IMPL";
5860 IdentifierInfo *II = &Context->Idents.get(RecName);
5861 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
5862 SourceLocation(), SourceLocation(),
5863 II);
5864 assert(RD && "RewriteObjCIvarRefExpr(): Can't find RecordDecl");
5865 QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
5866 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, castT,
5867 CK_BitCast,
5868 IV->getBase());
5869 // Don't forget the parens to enforce the proper binding.
5870 ParenExpr *PE = new (Context) ParenExpr(
5871 IV->getBase()->getBeginLoc(), IV->getBase()->getEndLoc(), castExpr);
5872 // Cannot delete IV->getBase(), since PE points to it.
5873 // Replace the old base with the cast. This is important when doing
5874 // embedded rewrites. For example, [newInv->_container addObject:0].
5875 IV->setBase(PE);
5876 }
5877 }
5878
5879 ReplaceStmtWithRange(IV, Replacement, OldRange);
5880 return Replacement;
5881 }
5882
5883 #endif // CLANG_ENABLE_OBJC_REWRITER
clang::PseudoObjectExpr::getNumSemanticExprs
unsigned getNumSemanticExprs() const
Definition: Expr.h:5363
clang::SourceManager::getLocForStartOfFile
SourceLocation getLocForStartOfFile(FileID FID) const
Return the source location corresponding to the first byte of the specified file. ...
Definition: SourceManager.h:1067
clang::ObjCMessageExpr::SuperInstance
The receiver is the instance of the superclass object.
Definition: ExprObjC.h:1061
clang::Builtin::ID
ID
Definition: Builtins.h:49
clang::BlockExpr::getBlockDecl
const BlockDecl * getBlockDecl() const
Definition: Expr.h:5191
Rewriter.h
clang::CanQual::withConst
QualType withConst() const
Retrieves a version of this type with const applied.
Definition: CanonicalType.h:162
clang::FunctionDecl
Represents a function declaration or definition.
Definition: Decl.h:1738
clang::ObjCMessageExpr::Instance
The receiver is an object instance.
Definition: ExprObjC.h:1055
clang::PseudoObjectExpr::getSyntacticForm
Expr * getSyntacticForm()
Return the syntactic form of this expression, i.e.
Definition: Expr.h:5343
clang::DiagnosticsEngine::hasErrorOccurred
bool hasErrorOccurred() const
Definition: Diagnostic.h:747
clang::SourceLocation::getLocWithOffset
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
Definition: SourceLocation.h:134
clang::BlockExpr::getFunctionType
const FunctionProtoType * getFunctionType() const
getFunctionType - Return the underlying function type for this block.
Definition: Expr.cpp:2131
clang::ASTContext::getObjCIdType
QualType getObjCIdType() const
Represents the Objective-CC id type.
Definition: ASTContext.h:1849
clang::PointerType
PointerType - C99 6.7.5.1 - Pointer Declarators.
Definition: Type.h:2537
clang::ASTContext::VoidPtrTy
CanQualType VoidPtrTy
Definition: ASTContext.h:1044
clang::PointerType::getPointeeType
QualType getPointeeType() const
Definition: Type.h:2550
clang::QualType
A (possibly-)qualified type.
Definition: Type.h:638
clang::Type::isBlockPointerType
bool isBlockPointerType() const
Definition: Type.h:6304
clang::Type::isArrayType
bool isArrayType() const
Definition: Type.h:6345
clang::FunctionDecl::isOverloadedOperator
bool isOverloadedOperator() const
Whether this function declaration represents an C++ overloaded operator, e.g., "operator+".
Definition: Decl.h:2376
clang::ObjCMessageExpr::getSelector
Selector getSelector() const
Definition: ExprObjC.cpp:312
clang::ObjCMethodDecl::getClassInterface
ObjCInterfaceDecl * getClassInterface()
Definition: DeclObjC.cpp:1144
clang::ASTConsumer
ASTConsumer - This is an abstract interface that should be implemented by clients that read ASTs...
Definition: ASTConsumer.h:34
clang::ParentMap
Definition: ParentMap.h:21
clang::ObjCInterfaceDecl::isThisDeclarationADefinition
bool isThisDeclarationADefinition() const
Determine whether this particular declaration of this class is actually also a definition.
Definition: DeclObjC.h:1530
AST.h
clang::ObjCPropertyImplDecl::getPropertyIvarDecl
ObjCIvarDecl * getPropertyIvarDecl() const
Definition: DeclObjC.h:2827
clang::ObjCAtCatchStmt::getRParenLoc
SourceLocation getRParenLoc() const
Definition: StmtObjC.h:104
clang::ObjCProtocolExpr::getProtocol
ObjCProtocolDecl * getProtocol() const
Definition: ExprObjC.h:490
clang::Stmt
Stmt - This represents one statement.
Definition: Stmt.h:66
clang::ObjCCategoryDecl::getReferencedProtocols
const ObjCProtocolList & getReferencedProtocols() const
Definition: DeclObjC.h:2349
clang::ObjCAtTryStmt::getFinallyStmt
const ObjCAtFinallyStmt * getFinallyStmt() const
Retrieve the @finally statement, if any.
Definition: StmtObjC.h:224
clang::FunctionType
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3355
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
clang::ObjCInterfaceDecl::getSuperClassLoc
SourceLocation getSuperClassLoc() const
Retrieve the starting location of the superclass.
Definition: DeclObjC.cpp:358
clang::Type::isRealFloatingType
bool isRealFloatingType() const
Floating point categories.
Definition: Type.cpp:1937
clang::VarDecl::getStorageClass
StorageClass getStorageClass() const
Returns the storage class as written in the source.
Definition: Decl.h:1020
Base
clang::BlockDecl::param_empty
bool param_empty() const
Definition: Decl.h:3955
SourceManager.h
Defines the SourceManager interface.
clang::ObjCPropertyImplDecl::Dynamic
Definition: DeclObjC.h:2763
clang::Type::isRecordType
bool isRecordType() const
Definition: Type.h:6369
clang::DeclGroupRef::end
iterator end()
Definition: DeclGroup.h:106
clang::Decl
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:87
clang::FunctionProtoType::isVariadic
bool isVariadic() const
Whether this function prototype is variadic.
Definition: Type.h:4002
clang::Decl::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: DeclBase.h:410
clang::BlockCall
Definition: CallEvent.h:564
clang::BlockDecl::param_end
param_iterator param_end()
Definition: Decl.h:3957
llvm::DenseSet
Definition: Sema.h:66
clang::ParenExpr
ParenExpr - This represents a parethesized expression, e.g.
Definition: Expr.h:1844
clang::SourceManager::getCharacterData
const char * getCharacterData(SourceLocation SL, bool *Invalid=nullptr) const
Return a pointer to the start of the specified location in the appropriate spelling MemoryBuffer...
Definition: SourceManager.cpp:1094
clang::IntegerLiteral
Definition: Expr.h:1308
clang::Type
The base class of the type hierarchy.
Definition: Type.h:1407
clang::ObjCAtThrowStmt
Represents Objective-C&#39;s @throw statement.
Definition: StmtObjC.h:313
IsHeaderFile
static bool IsHeaderFile(const std::string &Filename)
Definition: RewriteObjC.cpp:564
clang::ASTContext::LongTy
CanQualType LongTy
Definition: ASTContext.h:1025
clang::CanQual::getUnqualifiedType
CanQual< T > getUnqualifiedType() const
Retrieve the unqualified form of this type.
Definition: CanonicalType.h:619
clang::DiagnosticsEngine::Report
DiagnosticBuilder Report(SourceLocation Loc, unsigned DiagID)
Issue the message to the client.
Definition: Diagnostic.h:1295
clang::Type::getAsObjCInterfacePointerType
const ObjCObjectPointerType * getAsObjCInterfacePointerType() const
Definition: Type.cpp:1590
clang::QualType::isRestrictQualified
bool isRestrictQualified() const
Determine whether this type is restrict-qualified.
Definition: Type.h:6136
clang::ObjCInterfaceDecl::protocol_begin
protocol_iterator protocol_begin() const
Definition: DeclObjC.h:1370
clang::RecordDecl::completeDefinition
virtual void completeDefinition()
Note that the definition of this type is now complete.
Definition: Decl.cpp:4154
clang::Decl::getEndLoc
SourceLocation getEndLoc() const LLVM_READONLY
Definition: DeclBase.h:414
clang::CStyleCastExpr::getLParenLoc
SourceLocation getLParenLoc() const
Definition: Expr.h:3250
clang::TypeSourceInfo
A container of type source information.
Definition: Decl.h:87
clang::ObjCContainerDecl::instmeth_end
instmeth_iterator instmeth_end() const
Definition: DeclObjC.h:1062
clang::FPOptions
Floating point control options.
Definition: LangOptions.h:307
clang::XRayInstrKind::Function
constexpr XRayInstrMask Function
Definition: XRayInstr.h:39
distance
float __ovld __cnfn distance(float p0, float p1)
Returns the distance between p0 and p1.
clang::BlockDecl::param_iterator
MutableArrayRef< ParmVarDecl * >::iterator param_iterator
Definition: Decl.h:3952
clang::TagDecl::isCompleteDefinition
bool isCompleteDefinition() const
Return true if this decl has its body fully specified.
Definition: Decl.h:3169
clang::SourceManager::getBufferData
StringRef getBufferData(FileID FID, bool *Invalid=nullptr) const
Return a StringRef to the source buffer data for the specified FileID.
Definition: SourceManager.cpp:670
clang::VarDecl
Represents a variable declaration or definition.
Definition: Decl.h:813
clang::CompoundLiteralExpr
CompoundLiteralExpr - [C99 6.5.2.5].
Definition: Expr.h:2925
clang::SC_Static
Definition: Specifiers.h:210
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::FunctionProtoType::ExtProtoInfo
Extra information about a function prototype.
Definition: Type.h:3767
clang::ObjCMethodDecl
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:139
clang::ObjCMessageExpr::getLeftLoc
SourceLocation getLeftLoc() const
Definition: ExprObjC.h:1363
clang::RewriteBuffer
RewriteBuffer - As code is rewritten, SourceBuffer&#39;s from the original input with modifications get a...
Definition: RewriteBuffer.h:26
clang::Expr::IgnoreImplicit
Expr * IgnoreImplicit() LLVM_READONLY
IgnoreImplicit - Skip past any implicit AST nodes which might surround this expression.
Definition: Expr.h:747
clang::ASTContext::getObjCClassType
QualType getObjCClassType() const
Represents the Objective-C Class type.
Definition: ASTContext.h:1871
clang::PrintingPolicy
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:38
clang::ObjCContainerDecl::class_methods
classmeth_range class_methods() const
Definition: DeclObjC.h:1071
clang::Rewriter::getRewrittenText
std::string getRewrittenText(SourceRange Range) const
getRewrittenText - Return the rewritten form of the text in the specified range.
Definition: Rewriter.cpp:174
clang::index::SymbolKind::Class
clang::CodeGen::BLOCK_IS_GLOBAL
Definition: CGBlocks.h:60
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::ObjCProtocolDecl::getCanonicalDecl
ObjCProtocolDecl * getCanonicalDecl() override
Retrieves the canonical declaration of this Objective-C protocol.
Definition: DeclObjC.h:2250
clang::ObjCContainerDecl::instance_properties
instprop_range instance_properties() const
Definition: DeclObjC.h:1003
clang::IdentifierInfo
One of these records is kept for each identifier that is lexed.
Definition: IdentifierTable.h:58
clang::QualType::IgnoreParens
QualType IgnoreParens() const
Returns the specified type after dropping any outer-level parentheses.
Definition: Type.h:957
clang::ObjCObjectType
Represents a class type in Objective C.
Definition: Type.h:5538
clang::RecordDecl::Create
static RecordDecl * Create(const ASTContext &C, TagKind TK, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id, RecordDecl *PrevDecl=nullptr)
Definition: Decl.cpp:4107
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::RecordDecl::fields
field_range fields() const
Definition: Decl.h:3784
clang::Stmt::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Stmt.cpp:288
clang::FieldDecl
Represents a member of a struct/union/class.
Definition: Decl.h:2579
std
Definition: Format.h:2072
clang::ObjCMessageExpr::Create
static ObjCMessageExpr * Create(const ASTContext &Context, QualType T, ExprValueKind VK, SourceLocation LBracLoc, SourceLocation SuperLoc, bool IsInstanceSuper, QualType SuperType, Selector Sel, ArrayRef< SourceLocation > SelLocs, ObjCMethodDecl *Method, ArrayRef< Expr *> Args, SourceLocation RBracLoc, bool isImplicit)
Create a message send to super.
Definition: ExprObjC.cpp:207
clang::ObjCContainerDecl::instance_methods
instmeth_range instance_methods() const
Definition: DeclObjC.h:1054
clang::ObjCStringLiteral::getString
StringLiteral * getString()
Definition: ExprObjC.h:63
clang::ObjCMethodDecl::isDefined
bool isDefined() const
Definition: DeclObjC.h:440
clang::ObjCImplementationDecl::getNameAsString
std::string getNameAsString() const
Get the name of the class associated with this interface.
Definition: DeclObjC.h:2681
clang::CStyleCastExpr::getRParenLoc
SourceLocation getRParenLoc() const
Definition: Expr.h:3253
clang::ObjCPropertyDecl::getSetterMethodDecl
ObjCMethodDecl * getSetterMethodDecl() const
Definition: DeclObjC.h:925
clang::CodeGen::BLOCK_HAS_COPY_DISPOSE
Definition: CGBlocks.h:58
clang::ObjCInterfaceDecl::protocol_end
protocol_iterator protocol_end() const
Definition: DeclObjC.h:1381
clang::Rewriter::ReplaceText
bool ReplaceText(SourceLocation Start, unsigned OrigLength, StringRef NewStr)
ReplaceText - This method replaces a range of characters in the input buffer with a new string...
Definition: Rewriter.cpp:307
clang::LangOptions
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
Definition: LangOptions.h:50
clang::Type::isObjCQualifiedClassType
bool isObjCQualifiedClassType() const
Definition: Type.h:6416
llvm::SmallVectorImpl
Definition: LLVM.h:37
clang::ASTContext::Idents
IdentifierTable & Idents
Definition: ASTContext.h:566
clang::VK_RValue
An r-value expression (a pr-value in the C++11 taxonomy) produces a temporary value.
Definition: Specifiers.h:110
clang::ObjCSelectorExpr::getSelector
Selector getSelector() const
Definition: ExprObjC.h:442
clang::ObjCAtCatchStmt
Represents Objective-C&#39;s @catch statement.
Definition: StmtObjC.h:74
clang::InitListExpr
Describes an C or C++ initializer list.
Definition: Expr.h:4185
clang::FieldDecl::isBitField
bool isBitField() const
Determines whether this field is a bitfield.
Definition: Decl.h:2657
clang::FunctionDecl::getBody
Stmt * getBody(const FunctionDecl *&Definition) const
Retrieve the body (definition) of the function.
Definition: Decl.cpp:2731
clang::ObjCAtThrowStmt::getThrowExpr
const Expr * getThrowExpr() const
Definition: StmtObjC.h:325
clang::ObjCContainerDecl::instmeth_iterator
filtered_decl_iterator< ObjCMethodDecl, &ObjCMethodDecl::isInstanceMethod > instmeth_iterator
Definition: DeclObjC.h:1051
clang::ObjCImplementationDecl::ivar_size
unsigned ivar_size() const
Definition: DeclObjC.h:2713
clang::Expr::getValueKind
ExprValueKind getValueKind() const
getValueKind - The value kind that this expression produces.
Definition: Expr.h:405
clang::SourceManager::getExpansionLoc
SourceLocation getExpansionLoc(SourceLocation Loc) const
Given a SourceLocation object Loc, return the expansion location referenced by the ID...
Definition: SourceManager.h:1117
clang::ObjCPropertyDecl::getPropertyAttributes
PropertyAttributeKind getPropertyAttributes() const
Definition: DeclObjC.h:840
clang::Stmt::children
child_range children()
Definition: Stmt.cpp:237
clang::DiagnosticsEngine
Concrete class used by the front-end to report problems and issues.
Definition: Diagnostic.h:149
clang::TypeOfExprType
Represents a typeof (or typeof) expression (a GCC extension).
Definition: Type.h:4176
clang::ASTContext::getPrintingPolicy
const clang::PrintingPolicy & getPrintingPolicy() const
Definition: ASTContext.h:654
clang::TypeDecl
Represents a declaration of a type.
Definition: Decl.h:2874
clang::BinaryOperator
A builtin binary operation expression such as "x + y" or "x <= y".
Definition: Expr.h:3287
clang::QualType::isVolatileQualified
bool isVolatileQualified() const
Determine whether this type is volatile-qualified.
Definition: Type.h:6142
clang::ObjCPropertyDecl::OBJC_PR_nonatomic
Definition: DeclObjC.h:741
clang::CreateObjCRewriter
std::unique_ptr< ASTConsumer > CreateObjCRewriter(const std::string &InFile, std::unique_ptr< raw_ostream > OS, DiagnosticsEngine &Diags, const LangOptions &LOpts, bool SilenceRewriteMacroWarning)
Definition: RewriteObjC.cpp:593
clang::DeclGroupRef::begin
iterator begin()
Definition: DeclGroup.h:100
clang::ObjCAtTryStmt::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: StmtObjC.h:241
clang::ObjCPropertyDecl::isReadOnly
bool isReadOnly() const
isReadOnly - Return true iff the property has a setter.
Definition: DeclObjC.h:863
Diagnostic.h
Defines the Diagnostic-related interfaces.
clang::ObjCStringLiteral
ObjCStringLiteral, used for Objective-C string literals i.e.
Definition: ExprObjC.h:51
clang::ObjCProtocolDecl::getDefinition
ObjCProtocolDecl * getDefinition()
Retrieve the definition of this protocol, if any.
Definition: DeclObjC.h:2210
clang::declaresSameEntity
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1158
clang::CastExpr
CastExpr - Base class for type casts, including both implicit casts (ImplicitCastExpr) and explicit c...
Definition: Expr.h:2998
clang::ObjCMethodDecl::getCompoundBody
CompoundStmt * getCompoundBody()
Definition: DeclObjC.h:511
clang::ObjCProtocolDecl
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:2064
clang::ast_matchers::castExpr
const internal::VariadicDynCastAllOfMatcher< Stmt, CastExpr > castExpr
Matches any cast nodes of Clang&#39;s AST.
Definition: ASTMatchersInternal.cpp:759
clang::VarDecl::Create
static VarDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, StorageClass S)
Definition: Decl.cpp:1918
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
clang::LinkageSpecDecl
Represents a linkage specification.
Definition: DeclCXX.h:2826
clang::ObjCMethodDecl::getReturnType
QualType getReturnType() const
Definition: DeclObjC.h:323
llvm::ArrayRef
Definition: LLVM.h:32
clang::DeclaratorDecl::getTypeSpecStartLoc
SourceLocation getTypeSpecStartLoc() const
Definition: Decl.cpp:1765
clang::BlockExpr::getBody
const Stmt * getBody() const
Definition: Expr.cpp:2140
clang::FunctionDecl::Create
static FunctionDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, SourceLocation NLoc, DeclarationName N, QualType T, TypeSourceInfo *TInfo, StorageClass SC, bool isInlineSpecified=false, bool hasWrittenPrototype=true, bool isConstexprSpecified=false)
Definition: Decl.h:1875
clang::ObjCContainerDecl::getAtStartLoc
SourceLocation getAtStartLoc() const
Definition: DeclObjC.h:1115
clang::Stmt::ExprIterator
Iterator for iterating over Stmt * arrays that contain only Expr *.
Definition: Stmt.h:983
clang::ASTContext::getObjCEncodingForMethodDecl
std::string getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, bool Extended=false) const
Emit the encoded type for the method declaration Decl into S.
Definition: ASTContext.cpp:6296
clang::CallExpr::arg_end
arg_iterator arg_end()
Definition: Expr.h:2593
clang::ObjCIvarRefExpr::getDecl
ObjCIvarDecl * getDecl()
Definition: ExprObjC.h:543
clang::ObjCAtTryStmt::getCatchStmt
const ObjCAtCatchStmt * getCatchStmt(unsigned I) const
Retrieve a @catch statement.
Definition: StmtObjC.h:206
clang::ObjCPropertyImplDecl
ObjCPropertyImplDecl - Represents implementation declaration of a property in a class or category imp...
Definition: DeclObjC.h:2759
clang::ObjCForCollectionStmt::getBody
Stmt * getBody()
Definition: StmtObjC.h:39
clang::Decl::hasAttr
bool hasAttr() const
Definition: DeclBase.h:531
clang::ConditionalOperator
ConditionalOperator - The ?: ternary operator.
Definition: Expr.h:3582
CharInfo.h
clang::CompoundStmt
CompoundStmt - This represents a group of statements like { stmt stmt }.
Definition: Stmt.h:1241
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
Filename
StringRef Filename
Definition: Format.cpp:1629
clang::UnaryExprOrTypeTraitExpr
UnaryExprOrTypeTraitExpr - expression with either a type or (unevaluated) expression operand...
Definition: Expr.h:2222
ASTConsumers.h
clang::DeclRefExpr::getLocation
SourceLocation getLocation() const
Definition: Expr.h:1122
clang::ObjCListBase::empty
bool empty() const
Definition: DeclObjC.h:72
clang::ObjCMethodDecl::getEndLoc
SourceLocation getEndLoc() const LLVM_READONLY
Definition: DeclObjC.cpp:980
clang::ASTContext::getTrivialTypeSourceInfo
TypeSourceInfo * getTrivialTypeSourceInfo(QualType T, SourceLocation Loc=SourceLocation()) const
Allocate a TypeSourceInfo where all locations have been initialized to a given location, which defaults to the empty location.
Definition: ASTContext.cpp:2600
clang::ObjCInterfaceDecl::ivar_size
unsigned ivar_size() const
Definition: DeclObjC.h:1476
clang::ArrayType::Normal
Definition: Type.h:2819
clang::ObjCProtocolDecl::hasDefinition
bool hasDefinition() const
Determine whether this protocol has a definition.
Definition: DeclObjC.h:2198
clang::CodeGen::BLOCK_HAS_CXX_OBJ
Definition: CGBlocks.h:59
clang::StringLiteral::Create
static StringLiteral * Create(const ASTContext &Ctx, StringRef Str, StringKind Kind, bool Pascal, QualType Ty, const SourceLocation *Loc, unsigned NumConcatenated)
This is the "fully general" constructor that allows representation of strings formed from multiple co...
Definition: Expr.cpp:983
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::BlockDecl
Pepresents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:3858
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::ObjCImplementationDecl::ivar_end
ivar_iterator ivar_end() const
Definition: DeclObjC.h:2709
ParentMap.h
clang::ObjCInterfaceDecl::ivar_begin
ivar_iterator ivar_begin() const
Definition: DeclObjC.h:1460
clang::Lexer::MeasureTokenLength
static unsigned MeasureTokenLength(SourceLocation Loc, const SourceManager &SM, const LangOptions &LangOpts)
MeasureTokenLength - Relex the token at the specified location and return its length in bytes in the ...
Definition: Lexer.cpp:436
clang::CodeGen::BLOCK_BYREF_CALLER
Definition: CGBlocks.h:105
clang::Type::castAs
const T * castAs() const
Member-template castAs<specific type>.
Definition: Type.h:6811
clang::BlockExpr
BlockExpr - Adaptor class for mixing a BlockDecl with expressions.
Definition: Expr.h:5177
clang::FunctionDecl::isThisDeclarationADefinition
bool isThisDeclarationADefinition() const
Returns whether this specific declaration of the function is also a definition that does not contain ...
Definition: Decl.h:1983
clang::ObjCProtocolDecl::isThisDeclarationADefinition
bool isThisDeclarationADefinition() const
Determine whether this particular declaration is also the definition.
Definition: DeclObjC.h:2221
clang::ObjCMessageExpr::getEndLoc
SourceLocation getEndLoc() const LLVM_READONLY
Definition: ExprObjC.h:1400
clang::Decl::isImplicit
bool isImplicit() const
isImplicit - Indicates whether the declaration was implicitly generated by the implementation.
Definition: DeclBase.h:547
clang::ASTContext::getTagDeclType
QualType getTagDeclType(const TagDecl *Decl) const
Return the unique reference to the type for the specified TagDecl (struct/union/class/enum) decl...
Definition: ASTContext.cpp:4948
clang::CodeGen::BLOCK_BYREF_CURRENT_MAX
Definition: CGBlocks.h:107
clang::ObjCAtSynchronizedStmt::getSynchBody
const CompoundStmt * getSynchBody() const
Definition: StmtObjC.h:282
clang::Decl::getDeclContext
DeclContext * getDeclContext()
Definition: DeclBase.h:427
clang::SourceManager::isWrittenInMainFile
bool isWrittenInMainFile(SourceLocation Loc) const
Returns true if the spelling location for the given location is in the main file buffer.
Definition: SourceManager.h:1428
clang::ObjCAtSynchronizedStmt
Represents Objective-C&#39;s @synchronized statement.
Definition: StmtObjC.h:262
clang::ObjCInterfaceDecl::getSuperClass
ObjCInterfaceDecl * getSuperClass() const
Definition: DeclObjC.cpp:338
clang::ObjCSelectorExpr
ObjCSelectorExpr used for @selector in Objective-C.
Definition: ExprObjC.h:429
Lexer.h
clang::isAlphanumeric
LLVM_READONLY bool isAlphanumeric(unsigned char c)
Return true if this character is an ASCII letter or digit: [a-zA-Z0-9].
Definition: CharInfo.h:118
clang::ObjCForCollectionStmt::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: StmtObjC.h:58
clang::DeclRefExpr::refersToEnclosingVariableOrCapture
bool refersToEnclosingVariableOrCapture() const
Does this DeclRefExpr refer to an enclosing local or a captured variable?
Definition: Expr.h:1239
clang::QualType::getAsStringInternal
void getAsStringInternal(std::string &Str, const PrintingPolicy &Policy) const
Definition: TypePrinter.cpp:1842
IdentifierTable.h
Defines the clang::IdentifierInfo, clang::IdentifierTable, and clang::Selector interfaces.
clang::Expr::getType
QualType getType() const
Definition: Expr.h:128
clang::ObjCInterfaceDecl::lookupInstanceVariable
ObjCIvarDecl * lookupInstanceVariable(IdentifierInfo *IVarName, ObjCInterfaceDecl *&ClassDeclared)
Definition: DeclObjC.cpp:621
clang::ObjCImplDecl::property_impls
propimpl_range property_impls() const
Definition: DeclObjC.h:2467
clang::ASTContext::getConstantArrayType
QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize, ArrayType::ArraySizeModifier ASM, unsigned IndexTypeQuals) const
Return the unique reference to the type for a constant array of the specified element type...
Definition: ASTContext.cpp:3070
clang::ObjCAtTryStmt::getTryBody
const Stmt * getTryBody() const
Retrieve the @try body.
Definition: StmtObjC.h:197
clang::ObjCEncodeExpr::getEncodedType
QualType getEncodedType() const
Definition: ExprObjC.h:407
clang::isa
bool isa(CodeGen::Address addr)
Definition: Address.h:112
clang::ObjCMessageExpr
An expression that sends a message to the given Objective-C object or class.
Definition: ExprObjC.h:904
clang::ASTContext::getObjCInterfaceType
QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl, ObjCInterfaceDecl *PrevDecl=nullptr) const
getObjCInterfaceType - Return the unique reference to the type for the specified ObjC interface decl...
Definition: ASTContext.cpp:4717
clang::SourceRange::getEnd
SourceLocation getEnd() const
Definition: SourceLocation.h:208
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
clang::ObjCMethodDecl::isInstanceMethod
bool isInstanceMethod() const
Definition: DeclObjC.h:422
clang::ASTContext::getFunctionType
QualType getFunctionType(QualType ResultTy, ArrayRef< QualType > Args, const FunctionProtoType::ExtProtoInfo &EPI) const
Return a normal function type with a typed argument list.
Definition: ASTContext.h:1380
clang::ObjCMessageExpr::getReceiverKind
ReceiverKind getReceiverKind() const
Determine the kind of receiver that this message is being sent to.
Definition: ExprObjC.h:1188
clang::Rewriter::getRangeSize
int getRangeSize(SourceRange Range, RewriteOptions opts=RewriteOptions()) const
getRangeSize - Return the size in bytes of the specified range if they are in the same file...
Definition: Rewriter.cpp:165
ASTConsumer.h
clang::ObjCIvarRefExpr::setBase
void setBase(Expr *base)
Definition: ExprObjC.h:549
clang::DeclRefExpr::getDecl
ValueDecl * getDecl()
Definition: Expr.h:1114
clang::ObjCMethodDecl::getSelector
Selector getSelector() const
Definition: DeclObjC.h:321
clang::ASTContext::getTypeDeclType
QualType getTypeDeclType(const TypeDecl *Decl, const TypeDecl *PrevDecl=nullptr) const
Return the unique reference to the type for the specified type declaration.
Definition: ASTContext.h:1396
clang::ObjCSubstitutionContext::Result
The result type of a method or function.
clang::SourceManager::getExpansionLineNumber
unsigned getExpansionLineNumber(SourceLocation Loc, bool *Invalid=nullptr) const
Definition: SourceManager.cpp:1348
clang::ObjCPropertyImplDecl::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: DeclObjC.h:2815
clang::CStyleCastExpr
CStyleCastExpr - An explicit cast in C (C99 6.5.4) or a C-style cast in C++ (C++ [expr.cast]), which uses the syntax (Type)expr.
Definition: Expr.h:3224
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::ObjCAtCatchStmt::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: StmtObjC.h:107
clang::SkipFunctionBodiesScope::Preamble
SM
const SourceManager & SM
Definition: Format.cpp:1490
clang::CompoundStmt::getEndLoc
SourceLocation getEndLoc() const
Definition: Stmt.h:1331
clang::ObjCMessageExpr::getArg
Expr * getArg(unsigned Arg)
getArg - Return the specified argument.
Definition: ExprObjC.h:1342
clang::TypeOfExprType::getUnderlyingExpr
Expr * getUnderlyingExpr() const
Definition: Type.h:4185
clang::Stmt::getEndLoc
SourceLocation getEndLoc() const LLVM_READONLY
Definition: Stmt.cpp:301
clang::QualType::getCVRQualifiers
unsigned getCVRQualifiers() const
Retrieve the set of CVR (const-volatile-restrict) qualifiers applied to this type.
Definition: Type.h:6105
getIvarAccessString
static std::string getIvarAccessString(ObjCIvarDecl *OID)
Definition: RewriteObjC.cpp:757
clang::ObjCMethodDecl::setBody
void setBody(Stmt *B)
Definition: DeclObjC.h:512
clang::QualType::isConstQualified
bool isConstQualified() const
Determine whether this type is const-qualified.
Definition: Type.h:6131
clang::BlockDecl::param_begin
param_iterator param_begin()
Definition: Decl.h:3956
clang::CodeGen::BLOCK_FIELD_IS_WEAK
Definition: CGBlocks.h:102
clang::ObjCMessageExpr::getNumArgs
unsigned getNumArgs() const
Return the number of actual arguments in this message, not counting the receiver. ...
Definition: ExprObjC.h:1329
clang::Selector::getAsString
std::string getAsString() const
Derive the full selector name (e.g.
Definition: IdentifierTable.cpp:453
clang::TTK_Struct
The "struct" keyword.
Definition: Type.h:5033
Kind
Kind
Definition: ChrootChecker.cpp:29
clang::SourceManager::getBuffer
llvm::MemoryBuffer * getBuffer(FileID FID, SourceLocation Loc, bool *Invalid=nullptr) const
Return the buffer for the specified FileID.
Definition: SourceManager.h:955
Attr.h
clang::Rewriter::setSourceMgr
void setSourceMgr(SourceManager &SM, const LangOptions &LO)
Definition: Rewriter.h:62
clang::PseudoObjectExpr
PseudoObjectExpr - An expression which accesses a pseudo-object l-value.
Definition: Expr.h:5299
clang::FunctionProtoType::param_types
param_type_range param_types() const
Definition: Type.h:4030
clang::ObjCImplementationDecl::ivar_begin
ivar_iterator ivar_begin() const
Definition: DeclObjC.h:2705
clang::ObjCContainerDecl::classmeth_end
classmeth_iterator classmeth_end() const
Definition: DeclObjC.h:1079
clang::SourceLocation
Encodes a location in the source.
Definition: SourceLocation.h:88
clang::ObjCInterfaceType::getDecl
ObjCInterfaceDecl * getDecl() const
Get the declaration of this interface.
Definition: Type.h:5751
clang::IdentifierTable::get
IdentifierInfo & get(StringRef Name)
Return the identifier token info for the specified named identifier.
Definition: IdentifierTable.h:519
clang::FunctionType::getReturnType
QualType getReturnType() const
Definition: Type.h:3613
clang::ObjCInterfaceDecl::ivar_end
ivar_iterator ivar_end() const
Definition: DeclObjC.h:1468
clang::ObjCAtCatchStmt::getCatchBody
const Stmt * getCatchBody() const
Definition: StmtObjC.h:90
clang::ObjCInterfaceType
Interfaces are the core concept in Objective-C for object oriented design.
Definition: Type.h:5738
clang::NamedDecl::getNameAsString
std::string getNameAsString() const
Get a human-readable name for the declaration, even if it is one of the special kinds of names (C++ c...
Definition: Decl.h:292
clang::DeclStmt
DeclStmt - Adaptor class for mixing declarations with statements and expressions. ...
Definition: Stmt.h:1143
clang::ObjCList< ObjCProtocolDecl >
clang::ASTContext::getObjCSelType
QualType getObjCSelType() const
Retrieve the type that corresponds to the predefined Objective-C &#39;SEL&#39; type.
Definition: ASTContext.h:1859
clang::Rewriter::getRewriteBufferFor
const RewriteBuffer * getRewriteBufferFor(FileID FID) const
getRewriteBufferFor - Return the rewrite buffer for the specified FileID.
Definition: Rewriter.h:172
clang::ASTContext::getBaseElementType
QualType getBaseElementType(const ArrayType *VAT) const
Return the innermost element type of an array type.
Definition: ASTContext.cpp:5519
clang::Type::isIntegralType
bool isIntegralType(const ASTContext &Ctx) const
Determine whether this type is an integral type.
Definition: Type.cpp:1759
clang::Rewriter::InsertText
bool InsertText(SourceLocation Loc, StringRef Str, bool InsertAfter=true, bool indentNewLines=false)
InsertText - Insert the specified string at the specified location in the original buffer...
Definition: Rewriter.cpp:242
HasLocalVariableExternalStorage
static bool HasLocalVariableExternalStorage(ValueDecl *VD)
Definition: RewriteObjC.cpp:3245
clang::CodeGen::BLOCK_FIELD_IS_OBJECT
Definition: CGBlocks.h:96
clang::ObjCMessageExpr::getSuperLoc
SourceLocation getSuperLoc() const
Retrieve the location of the &#39;super&#39; keyword for a class or instance message to &#39;super&#39;, otherwise an invalid source location.
Definition: ExprObjC.h:1248
clang::ObjCCategoryDecl
ObjCCategoryDecl - Represents a category declaration.
Definition: DeclObjC.h:2280
clang::ASTContext::VoidTy
CanQualType VoidTy
Definition: ASTContext.h:1016
clang::DeclStmt::decl_begin
decl_iterator decl_begin()
Definition: Stmt.h:1192
clang::ObjCProtocolExpr
ObjCProtocolExpr used for protocol expression in Objective-C.
Definition: ExprObjC.h:474
llvm::SmallVector
Definition: LLVM.h:36
clang::Type::isObjCObjectPointerType
bool isObjCObjectPointerType() const
Definition: Type.h:6393
clang::ObjCPropertyDecl
Represents one property declaration in an Objective-C interface.
Definition: DeclObjC.h:729
clang::CodeGen::BLOCK_FIELD_IS_BLOCK
Definition: CGBlocks.h:98
clang::ImplicitCastExpr
ImplicitCastExpr - Allows us to explicitly represent implicit type conversions, which have no direct ...
Definition: Expr.h:3115
clang::ObjCMessageExpr::isImplicit
bool isImplicit() const
Indicates whether the message send was implicitly generated by the implementation.
Definition: ExprObjC.h:1184
clang::DiagnosticsEngine::getCustomDiagID
unsigned getCustomDiagID(Level L, const char(&FormatString)[N])
Return an ID for a diagnostic with the specified format string and level.
Definition: Diagnostic.h:776
clang::ObjCInterfaceDecl::isImplicitInterfaceDecl
bool isImplicitInterfaceDecl() const
isImplicitInterfaceDecl - check that this is an implicitly declared ObjCInterfaceDecl node...
Definition: DeclObjC.h:1893
clang::ObjCMessageExpr::getMethodDecl
const ObjCMethodDecl * getMethodDecl() const
Definition: ExprObjC.h:1303
clang::ObjCPropertyDecl::OBJC_PR_copy
Definition: DeclObjC.h:740
clang::ContinueStmt::getBeginLoc
SourceLocation getBeginLoc() const
Definition: Stmt.h:2396
clang::ObjCContainerDecl::classmeth_begin
classmeth_iterator classmeth_begin() const
Definition: DeclObjC.h:1075
clang::Expr::getExprLoc
SourceLocation getExprLoc() const LLVM_READONLY
getExprLoc - Return the preferred location for the arrow when diagnosing a problem with a generic exp...
Definition: Expr.cpp:215
clang::ASTContext::getObjCInstanceType
QualType getObjCInstanceType()
Retrieve the Objective-C "instancetype" type, if already known; otherwise, returns a NULL type;...
Definition: ASTContext.h:1730
clang::ObjCForCollectionStmt::getElement
Stmt * getElement()
Definition: StmtObjC.h:35
clang::IdentifierInfo::getName
StringRef getName() const
Return the actual identifier string.
Definition: IdentifierTable.h:156
clang::DeclContext::decl_iterator
decl_iterator - Iterates through the declarations stored within this context.
Definition: DeclBase.h:1954
clang::ObjCMessageExpr::getInstanceReceiver
Expr * getInstanceReceiver()
Returns the object expression (receiver) for an instance message, or null for a message that is not a...
Definition: ExprObjC.h:1207
clang::QualType::isObjCGCWeak
bool isObjCGCWeak() const
true when Type is objc&#39;s weak.
Definition: Type.h:1048
clang::TypedefNameDecl
Base class for declarations which introduce a typedef-name.
Definition: Decl.h:2916
clang::PseudoObjectExpr::getResultExpr
Expr * getResultExpr()
Return the result-bearing expression, or null if there is none.
Definition: Expr.h:5354
clang::FileID
An opaque identifier used by SourceManager which refers to a source file (MemoryBuffer) along with it...
Definition: SourceLocation.h:40
clang::frontend::RewriteObjC
ObjC->C Rewriter.
Definition: FrontendOptions.h:116
clang::ASTContext::CharTy
CanQualType CharTy
Definition: ASTContext.h:1018
clang::FunctionDecl::setBody
void setBody(Stmt *B)
Definition: Decl.cpp:2741
clang::ObjCImplDecl::getClassInterface
const ObjCInterfaceDecl * getClassInterface() const
Definition: DeclObjC.h:2440
clang
Dataflow Directional Tag Classes.
Definition: CFGReachabilityAnalysis.h:22
clang::Type::isObjCQualifiedInterfaceType
bool isObjCQualifiedInterfaceType() const
Definition: Type.cpp:1558
clang::SourceLocation::isValid
bool isValid() const
Return true if this is a valid SourceLocation object.
Definition: SourceLocation.h:108
clang::ObjCImplementationDecl::ivars
ivar_range ivars() const
Definition: DeclObjC.h:2703
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ArrayRef< Capture > captures() const
Definition: Decl.h:3985
scanToNextArgument
static void scanToNextArgument(const char *&argRef)
Definition: RewriteObjC.cpp:2045
clang::ObjCPropertyImplDecl::getPropertyImplementation
Kind getPropertyImplementation() const
Definition: DeclObjC.h:2823
clang::ObjCPropertyDecl::getAtLoc
SourceLocation getAtLoc() const
Definition: DeclObjC.h:821
clang::ObjCMessageExpr::getSuperType
QualType getSuperType() const
Retrieve the type referred to by &#39;super&#39;.
Definition: ExprObjC.h:1283
clang::SC_Extern
Definition: Specifiers.h:209
RewriteOneForwardClassDecl
static void RewriteOneForwardClassDecl(ObjCInterfaceDecl *ForwardDecl, std::string &typedefString)
Definition: RewriteObjC.cpp:889
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clang::ObjCInterfaceDecl::getReferencedProtocols
const ObjCProtocolList & getReferencedProtocols() const
Definition: DeclObjC.h:1341
clang::VarDecl::getInit
const Expr * getInit() const
Definition: Decl.h:1220
clang::SourceManager::getMainFileID
FileID getMainFileID() const
Returns the FileID of the main source file.
Definition: SourceManager.h:793
clang::ObjCAtSynchronizedStmt::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: StmtObjC.h:298
clang::DeclGroupRef
Definition: DeclGroup.h:52
clang::ObjCPropertyDecl::OBJC_PR_retain
Definition: DeclObjC.h:739
clang::QualType::getAsString
static std::string getAsString(SplitQualType split, const PrintingPolicy &Policy)
Definition: Type.h:971
clang::Decl::getKind
Kind getKind() const
Definition: DeclBase.h:421
clang::Type::isBooleanType
bool isBooleanType() const
Definition: Type.h:6657
clang::ObjCListBase::size
unsigned size() const
Definition: DeclObjC.h:71
clang::ASTContext::getFunctionNoProtoType
QualType getFunctionNoProtoType(QualType ResultTy, const FunctionType::ExtInfo &Info) const
Return a K&R style C function type like &#39;int()&#39;.
Definition: ASTContext.cpp:3570
clang::cast
U cast(CodeGen::Address addr)
Definition: Address.h:109
printf
int printf(__constant const char *st,...)
clang::ObjCAtSynchronizedStmt::getSynchExpr
const Expr * getSynchExpr() const
Definition: StmtObjC.h:290
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::FunctionType::getCallResultType
QualType getCallResultType(const ASTContext &Context) const
Determine the type of an expression that calls a function of this type.
Definition: Type.h:3636
clang::CodeGen::BLOCK_FIELD_IS_BYREF
Definition: CGBlocks.h:100
clang::StringLiteral::Ascii
Definition: Expr.h:1588
clang::DeclContext::specific_decl_iterator
specific_decl_iterator - Iterates over a subrange of declarations stored in a DeclContext, providing only those that are of type SpecificDecl (or a class derived from it).
Definition: DeclBase.h:2017
scanForProtocolRefs
static bool scanForProtocolRefs(const char *startBuf, const char *endBuf, const char *&startRef, const char *&endRef)
Definition: RewriteObjC.cpp:2028
clang::Expr::IgnoreParenImpCasts
Expr * IgnoreParenImpCasts() LLVM_READONLY
IgnoreParenImpCasts - Ignore parentheses and implicit casts.
Definition: Expr.cpp:2693
clang::DiagnosticsEngine::Warning
Definition: Diagnostic.h:156
clang::ObjCMessageExpr::getClassReceiver
QualType getClassReceiver() const
Returns the type of a class message send, or NULL if the message is not a class message.
Definition: ExprObjC.h:1226
clang::ObjCObjectPointerType
Represents a pointer to an Objective C object.
Definition: Type.h:5794
clang::StringLiteral::getByteLength
unsigned getByteLength() const
Definition: Expr.h:1677
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::ObjCForCollectionStmt::getRParenLoc
SourceLocation getRParenLoc() const
Definition: StmtObjC.h:55
BuildUniqueMethodName
static void BuildUniqueMethodName(std::string &Name, ObjCMethodDecl *MD)
Definition: RewriteObjC.cpp:3625
clang::RecordType
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:4370
clang::ObjCForCollectionStmt
Represents Objective-C&#39;s collection statement.
Definition: StmtObjC.h:24
clang::CallExpr::arg_begin
arg_iterator arg_begin()
Definition: Expr.h:2590
clang::ObjCEncodeExpr
ObjCEncodeExpr, used for @encode in Objective-C.
Definition: ExprObjC.h:386
clang::ObjCAtCatchStmt::hasEllipsis
bool hasEllipsis() const
Definition: StmtObjC.h:110
clang::CStyleCastExpr::Create
static CStyleCastExpr * Create(const ASTContext &Context, QualType T, ExprValueKind VK, CastKind K, Expr *Op, const CXXCastPath *BasePath, TypeSourceInfo *WrittenTy, SourceLocation L, SourceLocation R)
Definition: Expr.cpp:1865
clang::ObjCIvarRefExpr::getLocation
SourceLocation getLocation() const
Definition: ExprObjC.h:556
clang::ASTContext::getCharWidth
uint64_t getCharWidth() const
Return the size of the character type, in bits.
Definition: ASTContext.h:2074
clang::ObjCCategoryDecl::protocol_begin
protocol_iterator protocol_begin() const
Definition: DeclObjC.h:2360
clang::ASTContext::getObjCEncodingForType
void getObjCEncodingForType(QualType T, std::string &S, const FieldDecl *Field=nullptr, QualType *NotEncodedT=nullptr) const
Emit the Objective-CC type encoding for the given type T into S.
Definition: ASTContext.cpp:6476
clang::Type::isObjCQualifiedIdType
bool isObjCQualifiedIdType() const
Definition: Type.h:6410
clang::DeclStmt::decls
decl_range decls()
Definition: Stmt.h:1186
clang::ObjCInterfaceDecl::getCanonicalDecl
ObjCInterfaceDecl * getCanonicalDecl() override
Retrieves the canonical declaration of this Objective-C class.
Definition: DeclObjC.h:1915
clang::ObjCAtFinallyStmt
Represents Objective-C&#39;s @finally statement.
Definition: StmtObjC.h:120
clang::DeclContext::addDecl
void addDecl(Decl *D)
Add the declaration D into this context.
Definition: DeclBase.cpp:1507
clang::ObjCIvarRefExpr::getBase
const Expr * getBase() const
Definition: ExprObjC.h:547
clang::ASTContext::getTypeSize
uint64_t getTypeSize(QualType T) const
Return the size of the specified (complete) type T, in bits.
Definition: ASTContext.h:2070
clang::ObjCIvarRefExpr
ObjCIvarRefExpr - A reference to an ObjC instance variable.
Definition: ExprObjC.h:513
clang::ASTContext::getSourceManager
SourceManager & getSourceManager()
Definition: ASTContext.h:662
clang::ASTContext::getCanonicalType
CanQualType getCanonicalType(QualType T) const
Return the canonical (structural) type corresponding to the specified potentially non-canonical type ...
Definition: ASTContext.h:2253
clang::ObjCContainerDecl::getAtEndRange
SourceRange getAtEndRange() const
Definition: DeclObjC.h:1122
X
X
Add a minimal nested name specifier fixit hint to allow lookup of a tag name from an outer enclosing ...
Definition: SemaDecl.cpp:13954
clang::BreakStmt::getBeginLoc
SourceLocation getBeginLoc() const
Definition: Stmt.h:2422
clang::ObjCIvarRefExpr::isFreeIvar
bool isFreeIvar() const
Definition: ExprObjC.h:552
clang::Rewriter
Rewriter - This is the main interface to the rewrite buffers.
Definition: Rewriter.h:33
clang::FunctionProtoType::getParamType
QualType getParamType(unsigned i) const
Definition: Type.h:3890
clang::Stmt::printPretty
void printPretty(raw_ostream &OS, PrinterHelper *Helper, const PrintingPolicy &Policy, unsigned Indentation=0, StringRef NewlineSymbol="\, const ASTContext *Context=nullptr) const
Definition: StmtPrinter.cpp:2383
clang::ASTContext::getTranslationUnitDecl
TranslationUnitDecl * getTranslationUnitDecl() const
Definition: ASTContext.h:1009
clang::MemberExpr
MemberExpr - [C99 6.5.2.3] Structure and Union Members.
Definition: Expr.h:2682
clang::UETT_SizeOf
Definition: TypeTraits.h:98
clang::ObjCImplementationDecl::ivar_empty
bool ivar_empty() const
Definition: DeclObjC.h:2717
clang::ContinueStmt
ContinueStmt - This represents a continue.
Definition: Stmt.h:2384
clang::ObjCMessageExpr::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: ExprObjC.h:1399
clang::ObjCContainerDecl::classmeth_iterator
filtered_decl_iterator< ObjCMethodDecl, &ObjCMethodDecl::isClassMethod > classmeth_iterator
Definition: DeclObjC.h:1068
clang::SourceLocation::isInvalid
bool isInvalid() const
Definition: SourceLocation.h:109
clang::ObjCIvarDecl
ObjCIvarDecl - Represents an ObjC instance variable.
Definition: DeclObjC.h:1945
clang::Rewriter::isRewritable
static bool isRewritable(SourceLocation Loc)
isRewritable - Return true if this location is a raw file location, which is rewritable.
Definition: Rewriter.h:72
clang::TypedefDecl::Create
static TypedefDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id, TypeSourceInfo *TInfo)
Definition: Decl.cpp:4521
clang::AttrSyntax::C
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::ObjCMethodDecl::isVariadic
bool isVariadic() const
Definition: DeclObjC.h:427
clang::ObjCMessageExpr::Class
The receiver is a class.
Definition: ExprObjC.h:1052
clang::ObjCAtTryStmt
Represents Objective-C&#39;s @try ... @catch ... @finally statement.
Definition: StmtObjC.h:154
clang::ObjCCategoryDecl::protocol_end
protocol_iterator protocol_end() const
Definition: DeclObjC.h:2364
clang::Stmt::getSourceRange
SourceRange getSourceRange() const LLVM_READONLY
SourceLocation tokens are not useful in isolation - they are low level value objects created/interpre...
Definition: Stmt.cpp:276
clang::ObjCAtTryStmt::getNumCatchStmts
unsigned getNumCatchStmts() const
Retrieve the number of @catch statements in this try-catch-finally block.
Definition: StmtObjC.h:203
clang::StringLiteral
StringLiteral - This represents a string literal expression, e.g.
Definition: Expr.h:1566
clang::CallExpr
CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]).
Definition: Expr.h:2396
clang::ObjCMethodDecl::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: DeclObjC.h:283
clang::NamedDecl::getName
StringRef getName() const
Get the name of identifier for this declaration as a StringRef.
Definition: Decl.h:276
clang::ObjCImplementationDecl::getName
StringRef getName() const
getName - Get the name of identifier for the class interface associated with this implementation as a...
Definition: DeclObjC.h:2673
clang::ASTContext::IntTy
CanQualType IntTy
Definition: ASTContext.h:1025
clang::TranslationUnitDecl
The top declaration context.
Definition: Decl.h:108
clang::DeclRefExpr
A reference to a declared variable, function, enum, etc.
Definition: Expr.h:1041
clang::ObjCPropertyImplDecl::getPropertyDecl
ObjCPropertyDecl * getPropertyDecl() const
Definition: DeclObjC.h:2818
clang::CompoundStmt::getBeginLoc
SourceLocation getBeginLoc() const
Definition: Stmt.h:1330
clang::Type::isPointerType
bool isPointerType() const
Definition: Type.h:6296
clang::BreakStmt
BreakStmt - This represents a break.
Definition: Stmt.h:2410
clang::PseudoObjectExpr::getSemanticExpr
Expr * getSemanticExpr(unsigned index)
Definition: Expr.h:5387
clang::ObjCAtCatchStmt::getCatchParamDecl
const VarDecl * getCatchParamDecl() const
Definition: StmtObjC.h:94
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::SourceRange
A trivial tuple used to represent a source range.
Definition: SourceLocation.h:198
clang::ObjCContainerDecl::instmeth_begin
instmeth_iterator instmeth_begin() const
Definition: DeclObjC.h:1058
clang::FunctionProtoType::ExtProtoInfo::Variadic
bool Variadic
Definition: Type.h:3769
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::ASTContext::DoubleTy
CanQualType DoubleTy
Definition: ASTContext.h:1028
clang::ObjCInterfaceDecl::getEndOfDefinitionLoc
SourceLocation getEndOfDefinitionLoc() const
Definition: DeclObjC.h:1878
clang::ObjCMessageExpr::getRightLoc
SourceLocation getRightLoc() const
Definition: ExprObjC.h:1364
clang::Type::isFunctionPointerType
bool isFunctionPointerType() const
Definition: Type.h:6320
clang::FieldDecl::Create
static FieldDecl * Create(const ASTContext &C, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, Expr *BW, bool Mutable, InClassInitStyle InitStyle)
Definition: Decl.cpp:3762
clang::ObjCMessageExpr::SuperClass
The receiver is a superclass.
Definition: ExprObjC.h:1058
clang::ObjCMessageExpr::getSelectorLocs
void getSelectorLocs(SmallVectorImpl< SourceLocation > &SelLocs) const
Definition: ExprObjC.cpp:290
clang::SourceRange::getBegin
SourceLocation getBegin() const
Definition: SourceLocation.h:207
clang::ASTContext::getLangOpts
const LangOptions & getLangOpts() const
Definition: ASTContext.h:707
clang::ASTContext::getFullLoc
FullSourceLoc getFullLoc(SourceLocation Loc) const
Definition: ASTContext.h:719
clang::ObjCCategoryImplDecl
ObjCCategoryImplDecl - An object of this class encapsulates a category @implementation declaration...
Definition: DeclObjC.h:2499
clang::ICIS_NoInit
No in-class initializer.
Definition: Specifiers.h:230
clang::ObjCAtThrowStmt::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: StmtObjC.h:332
clang::SourceManager
This class handles loading and caching of source files into memory.
Definition: SourceManager.h:582
clang::ASTContext::BlockRequiresCopying
bool BlockRequiresCopying(QualType Ty, const VarDecl *D)
Returns true iff we need copy/dispose helpers for the given type.
Definition: ASTContext.cpp:6053
clang::Decl::getLocation
SourceLocation getLocation() const
Definition: DeclBase.h:418
clang::ObjCMethodDecl::parameters
ArrayRef< ParmVarDecl * > parameters() const
Definition: DeclObjC.h:367
clang::ObjCMessageExpr::getClassReceiverTypeInfo
TypeSourceInfo * getClassReceiverTypeInfo() const
Returns a type-source information of a class message send, or nullptr if the message is not a class m...
Definition: ExprObjC.h:1235
clang::ASTContext::getSizeType
CanQualType getSizeType() const
Return the unique type for "size_t" (C99 7.17), defined in <stddef.h>.
Definition: ASTContext.cpp:4958
clang::ObjCInterfaceDecl::FindCategoryDeclaration
ObjCCategoryDecl * FindCategoryDeclaration(IdentifierInfo *CategoryId) const
FindCategoryDeclaration - Finds category declaration in the list of categories for this class and ret...
Definition: DeclObjC.cpp:1664