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/Basic/TargetInfo.h"
24 #include "clang/Lex/Lexer.h"
25 #include "clang/Rewrite/Core/Rewriter.h"
26 #include "llvm/ADT/DenseSet.h"
27 #include "llvm/ADT/OwningPtr.h"
28 #include "llvm/ADT/SmallPtrSet.h"
29 #include "llvm/ADT/StringExtras.h"
30 #include "llvm/Support/MemoryBuffer.h"
31 #include "llvm/Support/raw_ostream.h"
32
33 using namespace clang;
34 using llvm::utostr;
35
36 namespace {
37 class RewriteModernObjC : public ASTConsumer {
38 protected:
39
40 enum {
41 BLOCK_FIELD_IS_OBJECT = 3, /* id, NSObject, __attribute__((NSObject)),
42 block, ... */
43 BLOCK_FIELD_IS_BLOCK = 7, /* a block variable */
44 BLOCK_FIELD_IS_BYREF = 8, /* the on stack structure holding the
45 __block variable */
46 BLOCK_FIELD_IS_WEAK = 16, /* declared __weak, only used in byref copy
47 helpers */
48 BLOCK_BYREF_CALLER = 128, /* called from __block (byref) copy/dispose
49 support routines */
50 BLOCK_BYREF_CURRENT_MAX = 256
51 };
52
53 enum {
54 BLOCK_NEEDS_FREE = (1 << 24),
55 BLOCK_HAS_COPY_DISPOSE = (1 << 25),
56 BLOCK_HAS_CXX_OBJ = (1 << 26),
57 BLOCK_IS_GC = (1 << 27),
58 BLOCK_IS_GLOBAL = (1 << 28),
59 BLOCK_HAS_DESCRIPTOR = (1 << 29)
60 };
61 static const int OBJC_ABI_VERSION = 7;
62
63 Rewriter Rewrite;
64 DiagnosticsEngine &Diags;
65 const LangOptions &LangOpts;
66 ASTContext *Context;
67 SourceManager *SM;
68 TranslationUnitDecl *TUDecl;
69 FileID MainFileID;
70 const char *MainFileStart, *MainFileEnd;
71 Stmt *CurrentBody;
72 ParentMap *PropParentMap; // created lazily.
73 std::string InFileName;
74 raw_ostream* OutFile;
75 std::string Preamble;
76
77 TypeDecl *ProtocolTypeDecl;
78 VarDecl *GlobalVarDecl;
79 Expr *GlobalConstructionExp;
80 unsigned RewriteFailedDiag;
81 unsigned GlobalBlockRewriteFailedDiag;
82 // ObjC string constant support.
83 unsigned NumObjCStringLiterals;
84 VarDecl *ConstantStringClassReference;
85 RecordDecl *NSStringRecord;
86
87 // ObjC foreach break/continue generation support.
88 int BcLabelCount;
89
90 unsigned TryFinallyContainsReturnDiag;
91 // Needed for super.
92 ObjCMethodDecl *CurMethodDef;
93 RecordDecl *SuperStructDecl;
94 RecordDecl *ConstantStringDecl;
95
96 FunctionDecl *MsgSendFunctionDecl;
97 FunctionDecl *MsgSendSuperFunctionDecl;
98 FunctionDecl *MsgSendStretFunctionDecl;
99 FunctionDecl *MsgSendSuperStretFunctionDecl;
100 FunctionDecl *MsgSendFpretFunctionDecl;
101 FunctionDecl *GetClassFunctionDecl;
102 FunctionDecl *GetMetaClassFunctionDecl;
103 FunctionDecl *GetSuperClassFunctionDecl;
104 FunctionDecl *SelGetUidFunctionDecl;
105 FunctionDecl *CFStringFunctionDecl;
106 FunctionDecl *SuperContructorFunctionDecl;
107 FunctionDecl *CurFunctionDef;
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> ObjCWrittenInterfaces;
115 llvm::SmallPtrSet<TagDecl*, 32> GlobalDefinedTags;
116 SmallVector<ObjCInterfaceDecl*, 32> ObjCInterfacesSeen;
117 /// DefinedNonLazyClasses - List of defined "non-lazy" classes.
118 SmallVector<ObjCInterfaceDecl*, 8> DefinedNonLazyClasses;
119
120 /// DefinedNonLazyCategories - List of defined "non-lazy" categories.
121 SmallVector<ObjCCategoryDecl *, 8> DefinedNonLazyCategories;
122
123 SmallVector<Stmt *, 32> Stmts;
124 SmallVector<int, 8> ObjCBcLabelNo;
125 // Remember all the @protocol(<expr>) expressions.
126 llvm::SmallPtrSet<ObjCProtocolDecl *, 32> ProtocolExprDecls;
127
128 llvm::DenseSet<uint64_t> CopyDestroyCache;
129
130 // Block expressions.
131 SmallVector<BlockExpr *, 32> Blocks;
132 SmallVector<int, 32> InnerDeclRefsCount;
133 SmallVector<DeclRefExpr *, 32> InnerDeclRefs;
134
135 SmallVector<DeclRefExpr *, 32> BlockDeclRefs;
136
137
138 // Block related declarations.
139 SmallVector<ValueDecl *, 8> BlockByCopyDecls;
140 llvm::SmallPtrSet<ValueDecl *, 8> BlockByCopyDeclsPtrSet;
141 SmallVector<ValueDecl *, 8> BlockByRefDecls;
142 llvm::SmallPtrSet<ValueDecl *, 8> BlockByRefDeclsPtrSet;
143 llvm::DenseMap<ValueDecl *, unsigned> BlockByRefDeclNo;
144 llvm::SmallPtrSet<ValueDecl *, 8> ImportedBlockDecls;
145 llvm::SmallPtrSet<VarDecl *, 8> ImportedLocalExternalDecls;
146
147 llvm::DenseMap<BlockExpr *, std::string> RewrittenBlockExprs;
148 llvm::DenseMap<ObjCInterfaceDecl *,
149 llvm::SmallPtrSet<ObjCIvarDecl *, 8> > ReferencedIvars;
150
151 // ivar bitfield grouping containers
152 llvm::DenseSet<const ObjCInterfaceDecl *> ObjCInterefaceHasBitfieldGroups;
153 llvm::DenseMap<const ObjCIvarDecl* , unsigned> IvarGroupNumber;
154 // This container maps an <class, group number for ivar> tuple to the type
155 // of the struct where the bitfield belongs.
156 llvm::DenseMap<std::pair<const ObjCInterfaceDecl*, unsigned>, QualType> GroupRecordType;
157 SmallVector<FunctionDecl*, 32> FunctionDefinitionsSeen;
158
159 // This maps an original source AST to it's rewritten form. This allows
160 // us to avoid rewriting the same node twice (which is very uncommon).
161 // This is needed to support some of the exotic property rewriting.
162 llvm::DenseMap<Stmt *, Stmt *> ReplacedNodes;
163
164 // Needed for header files being rewritten
165 bool IsHeader;
166 bool SilenceRewriteMacroWarning;
167 bool GenerateLineInfo;
168 bool objc_impl_method;
169
170 bool DisableReplaceStmt;
171 class DisableReplaceStmtScope {
172 RewriteModernObjC &R;
173 bool SavedValue;
174
175 public:
DisableReplaceStmtScope(RewriteModernObjC & R)176 DisableReplaceStmtScope(RewriteModernObjC &R)
177 : R(R), SavedValue(R.DisableReplaceStmt) {
178 R.DisableReplaceStmt = true;
179 }
~DisableReplaceStmtScope()180 ~DisableReplaceStmtScope() {
181 R.DisableReplaceStmt = SavedValue;
182 }
183 };
184 void InitializeCommon(ASTContext &context);
185
186 public:
187 llvm::DenseMap<ObjCMethodDecl*, std::string> MethodInternalNames;
188 // Top Level Driver code.
HandleTopLevelDecl(DeclGroupRef D)189 virtual bool HandleTopLevelDecl(DeclGroupRef D) {
190 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
191 if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(*I)) {
192 if (!Class->isThisDeclarationADefinition()) {
193 RewriteForwardClassDecl(D);
194 break;
195 } else {
196 // Keep track of all interface declarations seen.
197 ObjCInterfacesSeen.push_back(Class);
198 break;
199 }
200 }
201
202 if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>(*I)) {
203 if (!Proto->isThisDeclarationADefinition()) {
204 RewriteForwardProtocolDecl(D);
205 break;
206 }
207 }
208
209 if (FunctionDecl *FDecl = dyn_cast<FunctionDecl>(*I)) {
210 // Under modern abi, we cannot translate body of the function
211 // yet until all class extensions and its implementation is seen.
212 // This is because they may introduce new bitfields which must go
213 // into their grouping struct.
214 if (FDecl->isThisDeclarationADefinition() &&
215 // Not c functions defined inside an objc container.
216 !FDecl->isTopLevelDeclInObjCContainer()) {
217 FunctionDefinitionsSeen.push_back(FDecl);
218 break;
219 }
220 }
221 HandleTopLevelSingleDecl(*I);
222 }
223 return true;
224 }
225 void HandleTopLevelSingleDecl(Decl *D);
226 void HandleDeclInMainFile(Decl *D);
227 RewriteModernObjC(std::string inFile, raw_ostream *OS,
228 DiagnosticsEngine &D, const LangOptions &LOpts,
229 bool silenceMacroWarn, bool LineInfo);
230
~RewriteModernObjC()231 ~RewriteModernObjC() {}
232
233 virtual void HandleTranslationUnit(ASTContext &C);
234
ReplaceStmt(Stmt * Old,Stmt * New)235 void ReplaceStmt(Stmt *Old, Stmt *New) {
236 Stmt *ReplacingStmt = ReplacedNodes[Old];
237
238 if (ReplacingStmt)
239 return; // We can't rewrite the same node twice.
240
241 if (DisableReplaceStmt)
242 return;
243
244 // If replacement succeeded or warning disabled return with no warning.
245 if (!Rewrite.ReplaceStmt(Old, New)) {
246 ReplacedNodes[Old] = New;
247 return;
248 }
249 if (SilenceRewriteMacroWarning)
250 return;
251 Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag)
252 << Old->getSourceRange();
253 }
254
ReplaceStmtWithRange(Stmt * Old,Stmt * New,SourceRange SrcRange)255 void ReplaceStmtWithRange(Stmt *Old, Stmt *New, SourceRange SrcRange) {
256 if (DisableReplaceStmt)
257 return;
258
259 // Measure the old text.
260 int Size = Rewrite.getRangeSize(SrcRange);
261 if (Size == -1) {
262 Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag)
263 << Old->getSourceRange();
264 return;
265 }
266 // Get the new text.
267 std::string SStr;
268 llvm::raw_string_ostream S(SStr);
269 New->printPretty(S, 0, PrintingPolicy(LangOpts));
270 const std::string &Str = S.str();
271
272 // If replacement succeeded or warning disabled return with no warning.
273 if (!Rewrite.ReplaceText(SrcRange.getBegin(), Size, Str)) {
274 ReplacedNodes[Old] = New;
275 return;
276 }
277 if (SilenceRewriteMacroWarning)
278 return;
279 Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag)
280 << Old->getSourceRange();
281 }
282
InsertText(SourceLocation Loc,StringRef Str,bool InsertAfter=true)283 void InsertText(SourceLocation Loc, StringRef Str,
284 bool InsertAfter = true) {
285 // If insertion succeeded or warning disabled return with no warning.
286 if (!Rewrite.InsertText(Loc, Str, InsertAfter) ||
287 SilenceRewriteMacroWarning)
288 return;
289
290 Diags.Report(Context->getFullLoc(Loc), RewriteFailedDiag);
291 }
292
ReplaceText(SourceLocation Start,unsigned OrigLength,StringRef Str)293 void ReplaceText(SourceLocation Start, unsigned OrigLength,
294 StringRef Str) {
295 // If removal succeeded or warning disabled return with no warning.
296 if (!Rewrite.ReplaceText(Start, OrigLength, Str) ||
297 SilenceRewriteMacroWarning)
298 return;
299
300 Diags.Report(Context->getFullLoc(Start), RewriteFailedDiag);
301 }
302
303 // Syntactic Rewriting.
304 void RewriteRecordBody(RecordDecl *RD);
305 void RewriteInclude();
306 void RewriteLineDirective(const Decl *D);
307 void ConvertSourceLocationToLineDirective(SourceLocation Loc,
308 std::string &LineString);
309 void RewriteForwardClassDecl(DeclGroupRef D);
310 void RewriteForwardClassDecl(const SmallVectorImpl<Decl *> &DG);
311 void RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
312 const std::string &typedefString);
313 void RewriteImplementations();
314 void RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
315 ObjCImplementationDecl *IMD,
316 ObjCCategoryImplDecl *CID);
317 void RewriteInterfaceDecl(ObjCInterfaceDecl *Dcl);
318 void RewriteImplementationDecl(Decl *Dcl);
319 void RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
320 ObjCMethodDecl *MDecl, std::string &ResultStr);
321 void RewriteTypeIntoString(QualType T, std::string &ResultStr,
322 const FunctionType *&FPRetType);
323 void RewriteByRefString(std::string &ResultStr, const std::string &Name,
324 ValueDecl *VD, bool def=false);
325 void RewriteCategoryDecl(ObjCCategoryDecl *Dcl);
326 void RewriteProtocolDecl(ObjCProtocolDecl *Dcl);
327 void RewriteForwardProtocolDecl(DeclGroupRef D);
328 void RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG);
329 void RewriteMethodDeclaration(ObjCMethodDecl *Method);
330 void RewriteProperty(ObjCPropertyDecl *prop);
331 void RewriteFunctionDecl(FunctionDecl *FD);
332 void RewriteBlockPointerType(std::string& Str, QualType Type);
333 void RewriteBlockPointerTypeVariable(std::string& Str, ValueDecl *VD);
334 void RewriteBlockLiteralFunctionDecl(FunctionDecl *FD);
335 void RewriteObjCQualifiedInterfaceTypes(Decl *Dcl);
336 void RewriteTypeOfDecl(VarDecl *VD);
337 void RewriteObjCQualifiedInterfaceTypes(Expr *E);
338
339 std::string getIvarAccessString(ObjCIvarDecl *D);
340
341 // Expression Rewriting.
342 Stmt *RewriteFunctionBodyOrGlobalInitializer(Stmt *S);
343 Stmt *RewriteAtEncode(ObjCEncodeExpr *Exp);
344 Stmt *RewritePropertyOrImplicitGetter(PseudoObjectExpr *Pseudo);
345 Stmt *RewritePropertyOrImplicitSetter(PseudoObjectExpr *Pseudo);
346 Stmt *RewriteAtSelector(ObjCSelectorExpr *Exp);
347 Stmt *RewriteMessageExpr(ObjCMessageExpr *Exp);
348 Stmt *RewriteObjCStringLiteral(ObjCStringLiteral *Exp);
349 Stmt *RewriteObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Exp);
350 Stmt *RewriteObjCBoxedExpr(ObjCBoxedExpr *Exp);
351 Stmt *RewriteObjCArrayLiteralExpr(ObjCArrayLiteral *Exp);
352 Stmt *RewriteObjCDictionaryLiteralExpr(ObjCDictionaryLiteral *Exp);
353 Stmt *RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp);
354 Stmt *RewriteObjCTryStmt(ObjCAtTryStmt *S);
355 Stmt *RewriteObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S);
356 Stmt *RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S);
357 Stmt *RewriteObjCThrowStmt(ObjCAtThrowStmt *S);
358 Stmt *RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
359 SourceLocation OrigEnd);
360 Stmt *RewriteBreakStmt(BreakStmt *S);
361 Stmt *RewriteContinueStmt(ContinueStmt *S);
362 void RewriteCastExpr(CStyleCastExpr *CE);
363 void RewriteImplicitCastObjCExpr(CastExpr *IE);
364 void RewriteLinkageSpec(LinkageSpecDecl *LSD);
365
366 // Computes ivar bitfield group no.
367 unsigned ObjCIvarBitfieldGroupNo(ObjCIvarDecl *IV);
368 // Names field decl. for ivar bitfield group.
369 void ObjCIvarBitfieldGroupDecl(ObjCIvarDecl *IV, std::string &Result);
370 // Names struct type for ivar bitfield group.
371 void ObjCIvarBitfieldGroupType(ObjCIvarDecl *IV, std::string &Result);
372 // Names symbol for ivar bitfield group field offset.
373 void ObjCIvarBitfieldGroupOffset(ObjCIvarDecl *IV, std::string &Result);
374 // Given an ivar bitfield, it builds (or finds) its group record type.
375 QualType GetGroupRecordTypeForObjCIvarBitfield(ObjCIvarDecl *IV);
376 QualType SynthesizeBitfieldGroupStructType(
377 ObjCIvarDecl *IV,
378 SmallVectorImpl<ObjCIvarDecl *> &IVars);
379
380 // Block rewriting.
381 void RewriteBlocksInFunctionProtoType(QualType funcType, NamedDecl *D);
382
383 // Block specific rewrite rules.
384 void RewriteBlockPointerDecl(NamedDecl *VD);
385 void RewriteByRefVar(VarDecl *VD, bool firstDecl, bool lastDecl);
386 Stmt *RewriteBlockDeclRefExpr(DeclRefExpr *VD);
387 Stmt *RewriteLocalVariableExternalStorage(DeclRefExpr *DRE);
388 void RewriteBlockPointerFunctionArgs(FunctionDecl *FD);
389
390 void RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
391 std::string &Result);
392
393 void RewriteObjCFieldDecl(FieldDecl *fieldDecl, std::string &Result);
394 bool IsTagDefinedInsideClass(ObjCContainerDecl *IDecl, TagDecl *Tag,
395 bool &IsNamedDefinition);
396 void RewriteLocallyDefinedNamedAggregates(FieldDecl *fieldDecl,
397 std::string &Result);
398
399 bool RewriteObjCFieldDeclType(QualType &Type, std::string &Result);
400
401 void RewriteIvarOffsetSymbols(ObjCInterfaceDecl *CDecl,
402 std::string &Result);
403
404 virtual void Initialize(ASTContext &context);
405
406 // Misc. AST transformation routines. Sometimes they end up calling
407 // rewriting routines on the new ASTs.
408 CallExpr *SynthesizeCallToFunctionDecl(FunctionDecl *FD,
409 Expr **args, unsigned nargs,
410 SourceLocation StartLoc=SourceLocation(),
411 SourceLocation EndLoc=SourceLocation());
412
413 Expr *SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
414 QualType msgSendType,
415 QualType returnType,
416 SmallVectorImpl<QualType> &ArgTypes,
417 SmallVectorImpl<Expr*> &MsgExprs,
418 ObjCMethodDecl *Method);
419
420 Stmt *SynthMessageExpr(ObjCMessageExpr *Exp,
421 SourceLocation StartLoc=SourceLocation(),
422 SourceLocation EndLoc=SourceLocation());
423
424 void SynthCountByEnumWithState(std::string &buf);
425 void SynthMsgSendFunctionDecl();
426 void SynthMsgSendSuperFunctionDecl();
427 void SynthMsgSendStretFunctionDecl();
428 void SynthMsgSendFpretFunctionDecl();
429 void SynthMsgSendSuperStretFunctionDecl();
430 void SynthGetClassFunctionDecl();
431 void SynthGetMetaClassFunctionDecl();
432 void SynthGetSuperClassFunctionDecl();
433 void SynthSelGetUidFunctionDecl();
434 void SynthSuperContructorFunctionDecl();
435
436 // Rewriting metadata
437 template<typename MethodIterator>
438 void RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
439 MethodIterator MethodEnd,
440 bool IsInstanceMethod,
441 StringRef prefix,
442 StringRef ClassName,
443 std::string &Result);
444 void RewriteObjCProtocolMetaData(ObjCProtocolDecl *Protocol,
445 std::string &Result);
446 void RewriteObjCProtocolListMetaData(
447 const ObjCList<ObjCProtocolDecl> &Prots,
448 StringRef prefix, StringRef ClassName, std::string &Result);
449 void RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
450 std::string &Result);
451 void RewriteClassSetupInitHook(std::string &Result);
452
453 void RewriteMetaDataIntoBuffer(std::string &Result);
454 void WriteImageInfo(std::string &Result);
455 void RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *CDecl,
456 std::string &Result);
457 void RewriteCategorySetupInitHook(std::string &Result);
458
459 // Rewriting ivar
460 void RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
461 std::string &Result);
462 Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV);
463
464
465 std::string SynthesizeByrefCopyDestroyHelper(VarDecl *VD, int flag);
466 std::string SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
467 StringRef funcName, std::string Tag);
468 std::string SynthesizeBlockFunc(BlockExpr *CE, int i,
469 StringRef funcName, std::string Tag);
470 std::string SynthesizeBlockImpl(BlockExpr *CE,
471 std::string Tag, std::string Desc);
472 std::string SynthesizeBlockDescriptor(std::string DescTag,
473 std::string ImplTag,
474 int i, StringRef funcName,
475 unsigned hasCopy);
476 Stmt *SynthesizeBlockCall(CallExpr *Exp, const Expr* BlockExp);
477 void SynthesizeBlockLiterals(SourceLocation FunLocStart,
478 StringRef FunName);
479 FunctionDecl *SynthBlockInitFunctionDecl(StringRef name);
480 Stmt *SynthBlockInitExpr(BlockExpr *Exp,
481 const SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs);
482
483 // Misc. helper routines.
484 QualType getProtocolType();
485 void WarnAboutReturnGotoStmts(Stmt *S);
486 void CheckFunctionPointerDecl(QualType dType, NamedDecl *ND);
487 void InsertBlockLiteralsWithinFunction(FunctionDecl *FD);
488 void InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD);
489
490 bool IsDeclStmtInForeachHeader(DeclStmt *DS);
491 void CollectBlockDeclRefInfo(BlockExpr *Exp);
492 void GetBlockDeclRefExprs(Stmt *S);
493 void GetInnerBlockDeclRefExprs(Stmt *S,
494 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
495 llvm::SmallPtrSet<const DeclContext *, 8> &InnerContexts);
496
497 // We avoid calling Type::isBlockPointerType(), since it operates on the
498 // canonical type. We only care if the top-level type is a closure pointer.
isTopLevelBlockPointerType(QualType T)499 bool isTopLevelBlockPointerType(QualType T) {
500 return isa<BlockPointerType>(T);
501 }
502
503 /// convertBlockPointerToFunctionPointer - Converts a block-pointer type
504 /// to a function pointer type and upon success, returns true; false
505 /// otherwise.
convertBlockPointerToFunctionPointer(QualType & T)506 bool convertBlockPointerToFunctionPointer(QualType &T) {
507 if (isTopLevelBlockPointerType(T)) {
508 const BlockPointerType *BPT = T->getAs<BlockPointerType>();
509 T = Context->getPointerType(BPT->getPointeeType());
510 return true;
511 }
512 return false;
513 }
514
515 bool convertObjCTypeToCStyleType(QualType &T);
516
517 bool needToScanForQualifiers(QualType T);
518 QualType getSuperStructType();
519 QualType getConstantStringStructType();
520 QualType convertFunctionTypeOfBlocks(const FunctionType *FT);
521 bool BufferContainsPPDirectives(const char *startBuf, const char *endBuf);
522
convertToUnqualifiedObjCType(QualType & T)523 void convertToUnqualifiedObjCType(QualType &T) {
524 if (T->isObjCQualifiedIdType()) {
525 bool isConst = T.isConstQualified();
526 T = isConst ? Context->getObjCIdType().withConst()
527 : Context->getObjCIdType();
528 }
529 else if (T->isObjCQualifiedClassType())
530 T = Context->getObjCClassType();
531 else if (T->isObjCObjectPointerType() &&
532 T->getPointeeType()->isObjCQualifiedInterfaceType()) {
533 if (const ObjCObjectPointerType * OBJPT =
534 T->getAsObjCInterfacePointerType()) {
535 const ObjCInterfaceType *IFaceT = OBJPT->getInterfaceType();
536 T = QualType(IFaceT, 0);
537 T = Context->getPointerType(T);
538 }
539 }
540 }
541
542 // FIXME: This predicate seems like it would be useful to add to ASTContext.
isObjCType(QualType T)543 bool isObjCType(QualType T) {
544 if (!LangOpts.ObjC1 && !LangOpts.ObjC2)
545 return false;
546
547 QualType OCT = Context->getCanonicalType(T).getUnqualifiedType();
548
549 if (OCT == Context->getCanonicalType(Context->getObjCIdType()) ||
550 OCT == Context->getCanonicalType(Context->getObjCClassType()))
551 return true;
552
553 if (const PointerType *PT = OCT->getAs<PointerType>()) {
554 if (isa<ObjCInterfaceType>(PT->getPointeeType()) ||
555 PT->getPointeeType()->isObjCQualifiedIdType())
556 return true;
557 }
558 return false;
559 }
560 bool PointerTypeTakesAnyBlockArguments(QualType QT);
561 bool PointerTypeTakesAnyObjCQualifiedType(QualType QT);
562 void GetExtentOfArgList(const char *Name, const char *&LParen,
563 const char *&RParen);
564
QuoteDoublequotes(std::string & From,std::string & To)565 void QuoteDoublequotes(std::string &From, std::string &To) {
566 for (unsigned i = 0; i < From.length(); i++) {
567 if (From[i] == '"')
568 To += "\\\"";
569 else
570 To += From[i];
571 }
572 }
573
getSimpleFunctionType(QualType result,ArrayRef<QualType> args,bool variadic=false)574 QualType getSimpleFunctionType(QualType result,
575 ArrayRef<QualType> args,
576 bool variadic = false) {
577 if (result == Context->getObjCInstanceType())
578 result = Context->getObjCIdType();
579 FunctionProtoType::ExtProtoInfo fpi;
580 fpi.Variadic = variadic;
581 return Context->getFunctionType(result, args, fpi);
582 }
583
584 // Helper function: create a CStyleCastExpr with trivial type source info.
NoTypeInfoCStyleCastExpr(ASTContext * Ctx,QualType Ty,CastKind Kind,Expr * E)585 CStyleCastExpr* NoTypeInfoCStyleCastExpr(ASTContext *Ctx, QualType Ty,
586 CastKind Kind, Expr *E) {
587 TypeSourceInfo *TInfo = Ctx->getTrivialTypeSourceInfo(Ty, SourceLocation());
588 return CStyleCastExpr::Create(*Ctx, Ty, VK_RValue, Kind, E, 0, TInfo,
589 SourceLocation(), SourceLocation());
590 }
591
ImplementationIsNonLazy(const ObjCImplDecl * OD) const592 bool ImplementationIsNonLazy(const ObjCImplDecl *OD) const {
593 IdentifierInfo* II = &Context->Idents.get("load");
594 Selector LoadSel = Context->Selectors.getSelector(0, &II);
595 return OD->getClassMethod(LoadSel) != 0;
596 }
597 };
598
599 }
600
RewriteBlocksInFunctionProtoType(QualType funcType,NamedDecl * D)601 void RewriteModernObjC::RewriteBlocksInFunctionProtoType(QualType funcType,
602 NamedDecl *D) {
603 if (const FunctionProtoType *fproto
604 = dyn_cast<FunctionProtoType>(funcType.IgnoreParens())) {
605 for (FunctionProtoType::arg_type_iterator I = fproto->arg_type_begin(),
606 E = fproto->arg_type_end(); I && (I != E); ++I)
607 if (isTopLevelBlockPointerType(*I)) {
608 // All the args are checked/rewritten. Don't call twice!
609 RewriteBlockPointerDecl(D);
610 break;
611 }
612 }
613 }
614
CheckFunctionPointerDecl(QualType funcType,NamedDecl * ND)615 void RewriteModernObjC::CheckFunctionPointerDecl(QualType funcType, NamedDecl *ND) {
616 const PointerType *PT = funcType->getAs<PointerType>();
617 if (PT && PointerTypeTakesAnyBlockArguments(funcType))
618 RewriteBlocksInFunctionProtoType(PT->getPointeeType(), ND);
619 }
620
IsHeaderFile(const std::string & Filename)621 static bool IsHeaderFile(const std::string &Filename) {
622 std::string::size_type DotPos = Filename.rfind('.');
623
624 if (DotPos == std::string::npos) {
625 // no file extension
626 return false;
627 }
628
629 std::string Ext = std::string(Filename.begin()+DotPos+1, Filename.end());
630 // C header: .h
631 // C++ header: .hh or .H;
632 return Ext == "h" || Ext == "hh" || Ext == "H";
633 }
634
RewriteModernObjC(std::string inFile,raw_ostream * OS,DiagnosticsEngine & D,const LangOptions & LOpts,bool silenceMacroWarn,bool LineInfo)635 RewriteModernObjC::RewriteModernObjC(std::string inFile, raw_ostream* OS,
636 DiagnosticsEngine &D, const LangOptions &LOpts,
637 bool silenceMacroWarn,
638 bool LineInfo)
639 : Diags(D), LangOpts(LOpts), InFileName(inFile), OutFile(OS),
640 SilenceRewriteMacroWarning(silenceMacroWarn), GenerateLineInfo(LineInfo) {
641 IsHeader = IsHeaderFile(inFile);
642 RewriteFailedDiag = Diags.getCustomDiagID(DiagnosticsEngine::Warning,
643 "rewriting sub-expression within a macro (may not be correct)");
644 // FIXME. This should be an error. But if block is not called, it is OK. And it
645 // may break including some headers.
646 GlobalBlockRewriteFailedDiag = Diags.getCustomDiagID(DiagnosticsEngine::Warning,
647 "rewriting block literal declared in global scope is not implemented");
648
649 TryFinallyContainsReturnDiag = Diags.getCustomDiagID(
650 DiagnosticsEngine::Warning,
651 "rewriter doesn't support user-specified control flow semantics "
652 "for @try/@finally (code may not execute properly)");
653 }
654
CreateModernObjCRewriter(const std::string & InFile,raw_ostream * OS,DiagnosticsEngine & Diags,const LangOptions & LOpts,bool SilenceRewriteMacroWarning,bool LineInfo)655 ASTConsumer *clang::CreateModernObjCRewriter(const std::string& InFile,
656 raw_ostream* OS,
657 DiagnosticsEngine &Diags,
658 const LangOptions &LOpts,
659 bool SilenceRewriteMacroWarning,
660 bool LineInfo) {
661 return new RewriteModernObjC(InFile, OS, Diags, LOpts,
662 SilenceRewriteMacroWarning, LineInfo);
663 }
664
InitializeCommon(ASTContext & context)665 void RewriteModernObjC::InitializeCommon(ASTContext &context) {
666 Context = &context;
667 SM = &Context->getSourceManager();
668 TUDecl = Context->getTranslationUnitDecl();
669 MsgSendFunctionDecl = 0;
670 MsgSendSuperFunctionDecl = 0;
671 MsgSendStretFunctionDecl = 0;
672 MsgSendSuperStretFunctionDecl = 0;
673 MsgSendFpretFunctionDecl = 0;
674 GetClassFunctionDecl = 0;
675 GetMetaClassFunctionDecl = 0;
676 GetSuperClassFunctionDecl = 0;
677 SelGetUidFunctionDecl = 0;
678 CFStringFunctionDecl = 0;
679 ConstantStringClassReference = 0;
680 NSStringRecord = 0;
681 CurMethodDef = 0;
682 CurFunctionDef = 0;
683 GlobalVarDecl = 0;
684 GlobalConstructionExp = 0;
685 SuperStructDecl = 0;
686 ProtocolTypeDecl = 0;
687 ConstantStringDecl = 0;
688 BcLabelCount = 0;
689 SuperContructorFunctionDecl = 0;
690 NumObjCStringLiterals = 0;
691 PropParentMap = 0;
692 CurrentBody = 0;
693 DisableReplaceStmt = false;
694 objc_impl_method = false;
695
696 // Get the ID and start/end of the main file.
697 MainFileID = SM->getMainFileID();
698 const llvm::MemoryBuffer *MainBuf = SM->getBuffer(MainFileID);
699 MainFileStart = MainBuf->getBufferStart();
700 MainFileEnd = MainBuf->getBufferEnd();
701
702 Rewrite.setSourceMgr(Context->getSourceManager(), Context->getLangOpts());
703 }
704
705 //===----------------------------------------------------------------------===//
706 // Top Level Driver Code
707 //===----------------------------------------------------------------------===//
708
HandleTopLevelSingleDecl(Decl * D)709 void RewriteModernObjC::HandleTopLevelSingleDecl(Decl *D) {
710 if (Diags.hasErrorOccurred())
711 return;
712
713 // Two cases: either the decl could be in the main file, or it could be in a
714 // #included file. If the former, rewrite it now. If the later, check to see
715 // if we rewrote the #include/#import.
716 SourceLocation Loc = D->getLocation();
717 Loc = SM->getExpansionLoc(Loc);
718
719 // If this is for a builtin, ignore it.
720 if (Loc.isInvalid()) return;
721
722 // Look for built-in declarations that we need to refer during the rewrite.
723 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
724 RewriteFunctionDecl(FD);
725 } else if (VarDecl *FVD = dyn_cast<VarDecl>(D)) {
726 // declared in <Foundation/NSString.h>
727 if (FVD->getName() == "_NSConstantStringClassReference") {
728 ConstantStringClassReference = FVD;
729 return;
730 }
731 } else if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(D)) {
732 RewriteCategoryDecl(CD);
733 } else if (ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D)) {
734 if (PD->isThisDeclarationADefinition())
735 RewriteProtocolDecl(PD);
736 } else if (LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(D)) {
737 // FIXME. This will not work in all situations and leaving it out
738 // is harmless.
739 // RewriteLinkageSpec(LSD);
740
741 // Recurse into linkage specifications
742 for (DeclContext::decl_iterator DI = LSD->decls_begin(),
743 DIEnd = LSD->decls_end();
744 DI != DIEnd; ) {
745 if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>((*DI))) {
746 if (!IFace->isThisDeclarationADefinition()) {
747 SmallVector<Decl *, 8> DG;
748 SourceLocation StartLoc = IFace->getLocStart();
749 do {
750 if (isa<ObjCInterfaceDecl>(*DI) &&
751 !cast<ObjCInterfaceDecl>(*DI)->isThisDeclarationADefinition() &&
752 StartLoc == (*DI)->getLocStart())
753 DG.push_back(*DI);
754 else
755 break;
756
757 ++DI;
758 } while (DI != DIEnd);
759 RewriteForwardClassDecl(DG);
760 continue;
761 }
762 else {
763 // Keep track of all interface declarations seen.
764 ObjCInterfacesSeen.push_back(IFace);
765 ++DI;
766 continue;
767 }
768 }
769
770 if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>((*DI))) {
771 if (!Proto->isThisDeclarationADefinition()) {
772 SmallVector<Decl *, 8> DG;
773 SourceLocation StartLoc = Proto->getLocStart();
774 do {
775 if (isa<ObjCProtocolDecl>(*DI) &&
776 !cast<ObjCProtocolDecl>(*DI)->isThisDeclarationADefinition() &&
777 StartLoc == (*DI)->getLocStart())
778 DG.push_back(*DI);
779 else
780 break;
781
782 ++DI;
783 } while (DI != DIEnd);
784 RewriteForwardProtocolDecl(DG);
785 continue;
786 }
787 }
788
789 HandleTopLevelSingleDecl(*DI);
790 ++DI;
791 }
792 }
793 // If we have a decl in the main file, see if we should rewrite it.
794 if (SM->isFromMainFile(Loc))
795 return HandleDeclInMainFile(D);
796 }
797
798 //===----------------------------------------------------------------------===//
799 // Syntactic (non-AST) Rewriting Code
800 //===----------------------------------------------------------------------===//
801
RewriteInclude()802 void RewriteModernObjC::RewriteInclude() {
803 SourceLocation LocStart = SM->getLocForStartOfFile(MainFileID);
804 StringRef MainBuf = SM->getBufferData(MainFileID);
805 const char *MainBufStart = MainBuf.begin();
806 const char *MainBufEnd = MainBuf.end();
807 size_t ImportLen = strlen("import");
808
809 // Loop over the whole file, looking for includes.
810 for (const char *BufPtr = MainBufStart; BufPtr < MainBufEnd; ++BufPtr) {
811 if (*BufPtr == '#') {
812 if (++BufPtr == MainBufEnd)
813 return;
814 while (*BufPtr == ' ' || *BufPtr == '\t')
815 if (++BufPtr == MainBufEnd)
816 return;
817 if (!strncmp(BufPtr, "import", ImportLen)) {
818 // replace import with include
819 SourceLocation ImportLoc =
820 LocStart.getLocWithOffset(BufPtr-MainBufStart);
821 ReplaceText(ImportLoc, ImportLen, "include");
822 BufPtr += ImportLen;
823 }
824 }
825 }
826 }
827
WriteInternalIvarName(const ObjCInterfaceDecl * IDecl,ObjCIvarDecl * IvarDecl,std::string & Result)828 static void WriteInternalIvarName(const ObjCInterfaceDecl *IDecl,
829 ObjCIvarDecl *IvarDecl, std::string &Result) {
830 Result += "OBJC_IVAR_$_";
831 Result += IDecl->getName();
832 Result += "$";
833 Result += IvarDecl->getName();
834 }
835
836 std::string
getIvarAccessString(ObjCIvarDecl * D)837 RewriteModernObjC::getIvarAccessString(ObjCIvarDecl *D) {
838 const ObjCInterfaceDecl *ClassDecl = D->getContainingInterface();
839
840 // Build name of symbol holding ivar offset.
841 std::string IvarOffsetName;
842 if (D->isBitField())
843 ObjCIvarBitfieldGroupOffset(D, IvarOffsetName);
844 else
845 WriteInternalIvarName(ClassDecl, D, IvarOffsetName);
846
847
848 std::string S = "(*(";
849 QualType IvarT = D->getType();
850 if (D->isBitField())
851 IvarT = GetGroupRecordTypeForObjCIvarBitfield(D);
852
853 if (!isa<TypedefType>(IvarT) && IvarT->isRecordType()) {
854 RecordDecl *RD = IvarT->getAs<RecordType>()->getDecl();
855 RD = RD->getDefinition();
856 if (RD && !RD->getDeclName().getAsIdentifierInfo()) {
857 // decltype(((Foo_IMPL*)0)->bar) *
858 ObjCContainerDecl *CDecl =
859 dyn_cast<ObjCContainerDecl>(D->getDeclContext());
860 // ivar in class extensions requires special treatment.
861 if (ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CDecl))
862 CDecl = CatDecl->getClassInterface();
863 std::string RecName = CDecl->getName();
864 RecName += "_IMPL";
865 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
866 SourceLocation(), SourceLocation(),
867 &Context->Idents.get(RecName.c_str()));
868 QualType PtrStructIMPL = Context->getPointerType(Context->getTagDeclType(RD));
869 unsigned UnsignedIntSize =
870 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
871 Expr *Zero = IntegerLiteral::Create(*Context,
872 llvm::APInt(UnsignedIntSize, 0),
873 Context->UnsignedIntTy, SourceLocation());
874 Zero = NoTypeInfoCStyleCastExpr(Context, PtrStructIMPL, CK_BitCast, Zero);
875 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
876 Zero);
877 FieldDecl *FD = FieldDecl::Create(*Context, 0, SourceLocation(),
878 SourceLocation(),
879 &Context->Idents.get(D->getNameAsString()),
880 IvarT, 0,
881 /*BitWidth=*/0, /*Mutable=*/true,
882 ICIS_NoInit);
883 MemberExpr *ME = new (Context) MemberExpr(PE, true, FD, SourceLocation(),
884 FD->getType(), VK_LValue,
885 OK_Ordinary);
886 IvarT = Context->getDecltypeType(ME, ME->getType());
887 }
888 }
889 convertObjCTypeToCStyleType(IvarT);
890 QualType castT = Context->getPointerType(IvarT);
891 std::string TypeString(castT.getAsString(Context->getPrintingPolicy()));
892 S += TypeString;
893 S += ")";
894
895 // ((char *)self + IVAR_OFFSET_SYMBOL_NAME)
896 S += "((char *)self + ";
897 S += IvarOffsetName;
898 S += "))";
899 if (D->isBitField()) {
900 S += ".";
901 S += D->getNameAsString();
902 }
903 ReferencedIvars[const_cast<ObjCInterfaceDecl *>(ClassDecl)].insert(D);
904 return S;
905 }
906
907 /// mustSynthesizeSetterGetterMethod - returns true if setter or getter has not
908 /// been found in the class implementation. In this case, it must be synthesized.
mustSynthesizeSetterGetterMethod(ObjCImplementationDecl * IMP,ObjCPropertyDecl * PD,bool getter)909 static bool mustSynthesizeSetterGetterMethod(ObjCImplementationDecl *IMP,
910 ObjCPropertyDecl *PD,
911 bool getter) {
912 return getter ? !IMP->getInstanceMethod(PD->getGetterName())
913 : !IMP->getInstanceMethod(PD->getSetterName());
914
915 }
916
RewritePropertyImplDecl(ObjCPropertyImplDecl * PID,ObjCImplementationDecl * IMD,ObjCCategoryImplDecl * CID)917 void RewriteModernObjC::RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
918 ObjCImplementationDecl *IMD,
919 ObjCCategoryImplDecl *CID) {
920 static bool objcGetPropertyDefined = false;
921 static bool objcSetPropertyDefined = false;
922 SourceLocation startGetterSetterLoc;
923
924 if (PID->getLocStart().isValid()) {
925 SourceLocation startLoc = PID->getLocStart();
926 InsertText(startLoc, "// ");
927 const char *startBuf = SM->getCharacterData(startLoc);
928 assert((*startBuf == '@') && "bogus @synthesize location");
929 const char *semiBuf = strchr(startBuf, ';');
930 assert((*semiBuf == ';') && "@synthesize: can't find ';'");
931 startGetterSetterLoc = startLoc.getLocWithOffset(semiBuf-startBuf+1);
932 }
933 else
934 startGetterSetterLoc = IMD ? IMD->getLocEnd() : CID->getLocEnd();
935
936 if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
937 return; // FIXME: is this correct?
938
939 // Generate the 'getter' function.
940 ObjCPropertyDecl *PD = PID->getPropertyDecl();
941 ObjCIvarDecl *OID = PID->getPropertyIvarDecl();
942 assert(IMD && OID && "Synthesized ivars must be attached to @implementation");
943
944 unsigned Attributes = PD->getPropertyAttributes();
945 if (mustSynthesizeSetterGetterMethod(IMD, PD, true /*getter*/)) {
946 bool GenGetProperty = !(Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) &&
947 (Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
948 ObjCPropertyDecl::OBJC_PR_copy));
949 std::string Getr;
950 if (GenGetProperty && !objcGetPropertyDefined) {
951 objcGetPropertyDefined = true;
952 // FIXME. Is this attribute correct in all cases?
953 Getr = "\nextern \"C\" __declspec(dllimport) "
954 "id objc_getProperty(id, SEL, long, bool);\n";
955 }
956 RewriteObjCMethodDecl(OID->getContainingInterface(),
957 PD->getGetterMethodDecl(), Getr);
958 Getr += "{ ";
959 // Synthesize an explicit cast to gain access to the ivar.
960 // See objc-act.c:objc_synthesize_new_getter() for details.
961 if (GenGetProperty) {
962 // return objc_getProperty(self, _cmd, offsetof(ClassDecl, OID), 1)
963 Getr += "typedef ";
964 const FunctionType *FPRetType = 0;
965 RewriteTypeIntoString(PD->getGetterMethodDecl()->getResultType(), Getr,
966 FPRetType);
967 Getr += " _TYPE";
968 if (FPRetType) {
969 Getr += ")"; // close the precedence "scope" for "*".
970
971 // Now, emit the argument types (if any).
972 if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)){
973 Getr += "(";
974 for (unsigned i = 0, e = FT->getNumArgs(); i != e; ++i) {
975 if (i) Getr += ", ";
976 std::string ParamStr = FT->getArgType(i).getAsString(
977 Context->getPrintingPolicy());
978 Getr += ParamStr;
979 }
980 if (FT->isVariadic()) {
981 if (FT->getNumArgs()) Getr += ", ";
982 Getr += "...";
983 }
984 Getr += ")";
985 } else
986 Getr += "()";
987 }
988 Getr += ";\n";
989 Getr += "return (_TYPE)";
990 Getr += "objc_getProperty(self, _cmd, ";
991 RewriteIvarOffsetComputation(OID, Getr);
992 Getr += ", 1)";
993 }
994 else
995 Getr += "return " + getIvarAccessString(OID);
996 Getr += "; }";
997 InsertText(startGetterSetterLoc, Getr);
998 }
999
1000 if (PD->isReadOnly() ||
1001 !mustSynthesizeSetterGetterMethod(IMD, PD, false /*setter*/))
1002 return;
1003
1004 // Generate the 'setter' function.
1005 std::string Setr;
1006 bool GenSetProperty = Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
1007 ObjCPropertyDecl::OBJC_PR_copy);
1008 if (GenSetProperty && !objcSetPropertyDefined) {
1009 objcSetPropertyDefined = true;
1010 // FIXME. Is this attribute correct in all cases?
1011 Setr = "\nextern \"C\" __declspec(dllimport) "
1012 "void objc_setProperty (id, SEL, long, id, bool, bool);\n";
1013 }
1014
1015 RewriteObjCMethodDecl(OID->getContainingInterface(),
1016 PD->getSetterMethodDecl(), Setr);
1017 Setr += "{ ";
1018 // Synthesize an explicit cast to initialize the ivar.
1019 // See objc-act.c:objc_synthesize_new_setter() for details.
1020 if (GenSetProperty) {
1021 Setr += "objc_setProperty (self, _cmd, ";
1022 RewriteIvarOffsetComputation(OID, Setr);
1023 Setr += ", (id)";
1024 Setr += PD->getName();
1025 Setr += ", ";
1026 if (Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic)
1027 Setr += "0, ";
1028 else
1029 Setr += "1, ";
1030 if (Attributes & ObjCPropertyDecl::OBJC_PR_copy)
1031 Setr += "1)";
1032 else
1033 Setr += "0)";
1034 }
1035 else {
1036 Setr += getIvarAccessString(OID) + " = ";
1037 Setr += PD->getName();
1038 }
1039 Setr += "; }\n";
1040 InsertText(startGetterSetterLoc, Setr);
1041 }
1042
RewriteOneForwardClassDecl(ObjCInterfaceDecl * ForwardDecl,std::string & typedefString)1043 static void RewriteOneForwardClassDecl(ObjCInterfaceDecl *ForwardDecl,
1044 std::string &typedefString) {
1045 typedefString += "\n#ifndef _REWRITER_typedef_";
1046 typedefString += ForwardDecl->getNameAsString();
1047 typedefString += "\n";
1048 typedefString += "#define _REWRITER_typedef_";
1049 typedefString += ForwardDecl->getNameAsString();
1050 typedefString += "\n";
1051 typedefString += "typedef struct objc_object ";
1052 typedefString += ForwardDecl->getNameAsString();
1053 // typedef struct { } _objc_exc_Classname;
1054 typedefString += ";\ntypedef struct {} _objc_exc_";
1055 typedefString += ForwardDecl->getNameAsString();
1056 typedefString += ";\n#endif\n";
1057 }
1058
RewriteForwardClassEpilogue(ObjCInterfaceDecl * ClassDecl,const std::string & typedefString)1059 void RewriteModernObjC::RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
1060 const std::string &typedefString) {
1061 SourceLocation startLoc = ClassDecl->getLocStart();
1062 const char *startBuf = SM->getCharacterData(startLoc);
1063 const char *semiPtr = strchr(startBuf, ';');
1064 // Replace the @class with typedefs corresponding to the classes.
1065 ReplaceText(startLoc, semiPtr-startBuf+1, typedefString);
1066 }
1067
RewriteForwardClassDecl(DeclGroupRef D)1068 void RewriteModernObjC::RewriteForwardClassDecl(DeclGroupRef D) {
1069 std::string typedefString;
1070 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
1071 ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(*I);
1072 if (I == D.begin()) {
1073 // Translate to typedef's that forward reference structs with the same name
1074 // as the class. As a convenience, we include the original declaration
1075 // as a comment.
1076 typedefString += "// @class ";
1077 typedefString += ForwardDecl->getNameAsString();
1078 typedefString += ";";
1079 }
1080 RewriteOneForwardClassDecl(ForwardDecl, typedefString);
1081 }
1082 DeclGroupRef::iterator I = D.begin();
1083 RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(*I), typedefString);
1084 }
1085
RewriteForwardClassDecl(const SmallVectorImpl<Decl * > & D)1086 void RewriteModernObjC::RewriteForwardClassDecl(
1087 const SmallVectorImpl<Decl *> &D) {
1088 std::string typedefString;
1089 for (unsigned i = 0; i < D.size(); i++) {
1090 ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(D[i]);
1091 if (i == 0) {
1092 typedefString += "// @class ";
1093 typedefString += ForwardDecl->getNameAsString();
1094 typedefString += ";";
1095 }
1096 RewriteOneForwardClassDecl(ForwardDecl, typedefString);
1097 }
1098 RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(D[0]), typedefString);
1099 }
1100
RewriteMethodDeclaration(ObjCMethodDecl * Method)1101 void RewriteModernObjC::RewriteMethodDeclaration(ObjCMethodDecl *Method) {
1102 // When method is a synthesized one, such as a getter/setter there is
1103 // nothing to rewrite.
1104 if (Method->isImplicit())
1105 return;
1106 SourceLocation LocStart = Method->getLocStart();
1107 SourceLocation LocEnd = Method->getLocEnd();
1108
1109 if (SM->getExpansionLineNumber(LocEnd) >
1110 SM->getExpansionLineNumber(LocStart)) {
1111 InsertText(LocStart, "#if 0\n");
1112 ReplaceText(LocEnd, 1, ";\n#endif\n");
1113 } else {
1114 InsertText(LocStart, "// ");
1115 }
1116 }
1117
RewriteProperty(ObjCPropertyDecl * prop)1118 void RewriteModernObjC::RewriteProperty(ObjCPropertyDecl *prop) {
1119 SourceLocation Loc = prop->getAtLoc();
1120
1121 ReplaceText(Loc, 0, "// ");
1122 // FIXME: handle properties that are declared across multiple lines.
1123 }
1124
RewriteCategoryDecl(ObjCCategoryDecl * CatDecl)1125 void RewriteModernObjC::RewriteCategoryDecl(ObjCCategoryDecl *CatDecl) {
1126 SourceLocation LocStart = CatDecl->getLocStart();
1127
1128 // FIXME: handle category headers that are declared across multiple lines.
1129 if (CatDecl->getIvarRBraceLoc().isValid()) {
1130 ReplaceText(LocStart, 1, "/** ");
1131 ReplaceText(CatDecl->getIvarRBraceLoc(), 1, "**/ ");
1132 }
1133 else {
1134 ReplaceText(LocStart, 0, "// ");
1135 }
1136
1137 for (ObjCCategoryDecl::prop_iterator I = CatDecl->prop_begin(),
1138 E = CatDecl->prop_end(); I != E; ++I)
1139 RewriteProperty(*I);
1140
1141 for (ObjCCategoryDecl::instmeth_iterator
1142 I = CatDecl->instmeth_begin(), E = CatDecl->instmeth_end();
1143 I != E; ++I)
1144 RewriteMethodDeclaration(*I);
1145 for (ObjCCategoryDecl::classmeth_iterator
1146 I = CatDecl->classmeth_begin(), E = CatDecl->classmeth_end();
1147 I != E; ++I)
1148 RewriteMethodDeclaration(*I);
1149
1150 // Lastly, comment out the @end.
1151 ReplaceText(CatDecl->getAtEndRange().getBegin(),
1152 strlen("@end"), "/* @end */\n");
1153 }
1154
RewriteProtocolDecl(ObjCProtocolDecl * PDecl)1155 void RewriteModernObjC::RewriteProtocolDecl(ObjCProtocolDecl *PDecl) {
1156 SourceLocation LocStart = PDecl->getLocStart();
1157 assert(PDecl->isThisDeclarationADefinition());
1158
1159 // FIXME: handle protocol headers that are declared across multiple lines.
1160 ReplaceText(LocStart, 0, "// ");
1161
1162 for (ObjCProtocolDecl::instmeth_iterator
1163 I = PDecl->instmeth_begin(), E = PDecl->instmeth_end();
1164 I != E; ++I)
1165 RewriteMethodDeclaration(*I);
1166 for (ObjCProtocolDecl::classmeth_iterator
1167 I = PDecl->classmeth_begin(), E = PDecl->classmeth_end();
1168 I != E; ++I)
1169 RewriteMethodDeclaration(*I);
1170
1171 for (ObjCInterfaceDecl::prop_iterator I = PDecl->prop_begin(),
1172 E = PDecl->prop_end(); I != E; ++I)
1173 RewriteProperty(*I);
1174
1175 // Lastly, comment out the @end.
1176 SourceLocation LocEnd = PDecl->getAtEndRange().getBegin();
1177 ReplaceText(LocEnd, strlen("@end"), "/* @end */\n");
1178
1179 // Must comment out @optional/@required
1180 const char *startBuf = SM->getCharacterData(LocStart);
1181 const char *endBuf = SM->getCharacterData(LocEnd);
1182 for (const char *p = startBuf; p < endBuf; p++) {
1183 if (*p == '@' && !strncmp(p+1, "optional", strlen("optional"))) {
1184 SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
1185 ReplaceText(OptionalLoc, strlen("@optional"), "/* @optional */");
1186
1187 }
1188 else if (*p == '@' && !strncmp(p+1, "required", strlen("required"))) {
1189 SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
1190 ReplaceText(OptionalLoc, strlen("@required"), "/* @required */");
1191
1192 }
1193 }
1194 }
1195
RewriteForwardProtocolDecl(DeclGroupRef D)1196 void RewriteModernObjC::RewriteForwardProtocolDecl(DeclGroupRef D) {
1197 SourceLocation LocStart = (*D.begin())->getLocStart();
1198 if (LocStart.isInvalid())
1199 llvm_unreachable("Invalid SourceLocation");
1200 // FIXME: handle forward protocol that are declared across multiple lines.
1201 ReplaceText(LocStart, 0, "// ");
1202 }
1203
1204 void
RewriteForwardProtocolDecl(const SmallVectorImpl<Decl * > & DG)1205 RewriteModernObjC::RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG) {
1206 SourceLocation LocStart = DG[0]->getLocStart();
1207 if (LocStart.isInvalid())
1208 llvm_unreachable("Invalid SourceLocation");
1209 // FIXME: handle forward protocol that are declared across multiple lines.
1210 ReplaceText(LocStart, 0, "// ");
1211 }
1212
1213 void
RewriteLinkageSpec(LinkageSpecDecl * LSD)1214 RewriteModernObjC::RewriteLinkageSpec(LinkageSpecDecl *LSD) {
1215 SourceLocation LocStart = LSD->getExternLoc();
1216 if (LocStart.isInvalid())
1217 llvm_unreachable("Invalid extern SourceLocation");
1218
1219 ReplaceText(LocStart, 0, "// ");
1220 if (!LSD->hasBraces())
1221 return;
1222 // FIXME. We don't rewrite well if '{' is not on same line as 'extern'.
1223 SourceLocation LocRBrace = LSD->getRBraceLoc();
1224 if (LocRBrace.isInvalid())
1225 llvm_unreachable("Invalid rbrace SourceLocation");
1226 ReplaceText(LocRBrace, 0, "// ");
1227 }
1228
RewriteTypeIntoString(QualType T,std::string & ResultStr,const FunctionType * & FPRetType)1229 void RewriteModernObjC::RewriteTypeIntoString(QualType T, std::string &ResultStr,
1230 const FunctionType *&FPRetType) {
1231 if (T->isObjCQualifiedIdType())
1232 ResultStr += "id";
1233 else if (T->isFunctionPointerType() ||
1234 T->isBlockPointerType()) {
1235 // needs special handling, since pointer-to-functions have special
1236 // syntax (where a decaration models use).
1237 QualType retType = T;
1238 QualType PointeeTy;
1239 if (const PointerType* PT = retType->getAs<PointerType>())
1240 PointeeTy = PT->getPointeeType();
1241 else if (const BlockPointerType *BPT = retType->getAs<BlockPointerType>())
1242 PointeeTy = BPT->getPointeeType();
1243 if ((FPRetType = PointeeTy->getAs<FunctionType>())) {
1244 ResultStr += FPRetType->getResultType().getAsString(
1245 Context->getPrintingPolicy());
1246 ResultStr += "(*";
1247 }
1248 } else
1249 ResultStr += T.getAsString(Context->getPrintingPolicy());
1250 }
1251
RewriteObjCMethodDecl(const ObjCInterfaceDecl * IDecl,ObjCMethodDecl * OMD,std::string & ResultStr)1252 void RewriteModernObjC::RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
1253 ObjCMethodDecl *OMD,
1254 std::string &ResultStr) {
1255 //fprintf(stderr,"In RewriteObjCMethodDecl\n");
1256 const FunctionType *FPRetType = 0;
1257 ResultStr += "\nstatic ";
1258 RewriteTypeIntoString(OMD->getResultType(), ResultStr, FPRetType);
1259 ResultStr += " ";
1260
1261 // Unique method name
1262 std::string NameStr;
1263
1264 if (OMD->isInstanceMethod())
1265 NameStr += "_I_";
1266 else
1267 NameStr += "_C_";
1268
1269 NameStr += IDecl->getNameAsString();
1270 NameStr += "_";
1271
1272 if (ObjCCategoryImplDecl *CID =
1273 dyn_cast<ObjCCategoryImplDecl>(OMD->getDeclContext())) {
1274 NameStr += CID->getNameAsString();
1275 NameStr += "_";
1276 }
1277 // Append selector names, replacing ':' with '_'
1278 {
1279 std::string selString = OMD->getSelector().getAsString();
1280 int len = selString.size();
1281 for (int i = 0; i < len; i++)
1282 if (selString[i] == ':')
1283 selString[i] = '_';
1284 NameStr += selString;
1285 }
1286 // Remember this name for metadata emission
1287 MethodInternalNames[OMD] = NameStr;
1288 ResultStr += NameStr;
1289
1290 // Rewrite arguments
1291 ResultStr += "(";
1292
1293 // invisible arguments
1294 if (OMD->isInstanceMethod()) {
1295 QualType selfTy = Context->getObjCInterfaceType(IDecl);
1296 selfTy = Context->getPointerType(selfTy);
1297 if (!LangOpts.MicrosoftExt) {
1298 if (ObjCSynthesizedStructs.count(const_cast<ObjCInterfaceDecl*>(IDecl)))
1299 ResultStr += "struct ";
1300 }
1301 // When rewriting for Microsoft, explicitly omit the structure name.
1302 ResultStr += IDecl->getNameAsString();
1303 ResultStr += " *";
1304 }
1305 else
1306 ResultStr += Context->getObjCClassType().getAsString(
1307 Context->getPrintingPolicy());
1308
1309 ResultStr += " self, ";
1310 ResultStr += Context->getObjCSelType().getAsString(Context->getPrintingPolicy());
1311 ResultStr += " _cmd";
1312
1313 // Method arguments.
1314 for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
1315 E = OMD->param_end(); PI != E; ++PI) {
1316 ParmVarDecl *PDecl = *PI;
1317 ResultStr += ", ";
1318 if (PDecl->getType()->isObjCQualifiedIdType()) {
1319 ResultStr += "id ";
1320 ResultStr += PDecl->getNameAsString();
1321 } else {
1322 std::string Name = PDecl->getNameAsString();
1323 QualType QT = PDecl->getType();
1324 // Make sure we convert "t (^)(...)" to "t (*)(...)".
1325 (void)convertBlockPointerToFunctionPointer(QT);
1326 QT.getAsStringInternal(Name, Context->getPrintingPolicy());
1327 ResultStr += Name;
1328 }
1329 }
1330 if (OMD->isVariadic())
1331 ResultStr += ", ...";
1332 ResultStr += ") ";
1333
1334 if (FPRetType) {
1335 ResultStr += ")"; // close the precedence "scope" for "*".
1336
1337 // Now, emit the argument types (if any).
1338 if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)) {
1339 ResultStr += "(";
1340 for (unsigned i = 0, e = FT->getNumArgs(); i != e; ++i) {
1341 if (i) ResultStr += ", ";
1342 std::string ParamStr = FT->getArgType(i).getAsString(
1343 Context->getPrintingPolicy());
1344 ResultStr += ParamStr;
1345 }
1346 if (FT->isVariadic()) {
1347 if (FT->getNumArgs()) ResultStr += ", ";
1348 ResultStr += "...";
1349 }
1350 ResultStr += ")";
1351 } else {
1352 ResultStr += "()";
1353 }
1354 }
1355 }
RewriteImplementationDecl(Decl * OID)1356 void RewriteModernObjC::RewriteImplementationDecl(Decl *OID) {
1357 ObjCImplementationDecl *IMD = dyn_cast<ObjCImplementationDecl>(OID);
1358 ObjCCategoryImplDecl *CID = dyn_cast<ObjCCategoryImplDecl>(OID);
1359
1360 if (IMD) {
1361 if (IMD->getIvarRBraceLoc().isValid()) {
1362 ReplaceText(IMD->getLocStart(), 1, "/** ");
1363 ReplaceText(IMD->getIvarRBraceLoc(), 1, "**/ ");
1364 }
1365 else {
1366 InsertText(IMD->getLocStart(), "// ");
1367 }
1368 }
1369 else
1370 InsertText(CID->getLocStart(), "// ");
1371
1372 for (ObjCCategoryImplDecl::instmeth_iterator
1373 I = IMD ? IMD->instmeth_begin() : CID->instmeth_begin(),
1374 E = IMD ? IMD->instmeth_end() : CID->instmeth_end();
1375 I != E; ++I) {
1376 std::string ResultStr;
1377 ObjCMethodDecl *OMD = *I;
1378 RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
1379 SourceLocation LocStart = OMD->getLocStart();
1380 SourceLocation LocEnd = OMD->getCompoundBody()->getLocStart();
1381
1382 const char *startBuf = SM->getCharacterData(LocStart);
1383 const char *endBuf = SM->getCharacterData(LocEnd);
1384 ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1385 }
1386
1387 for (ObjCCategoryImplDecl::classmeth_iterator
1388 I = IMD ? IMD->classmeth_begin() : CID->classmeth_begin(),
1389 E = IMD ? IMD->classmeth_end() : CID->classmeth_end();
1390 I != E; ++I) {
1391 std::string ResultStr;
1392 ObjCMethodDecl *OMD = *I;
1393 RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
1394 SourceLocation LocStart = OMD->getLocStart();
1395 SourceLocation LocEnd = OMD->getCompoundBody()->getLocStart();
1396
1397 const char *startBuf = SM->getCharacterData(LocStart);
1398 const char *endBuf = SM->getCharacterData(LocEnd);
1399 ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1400 }
1401 for (ObjCCategoryImplDecl::propimpl_iterator
1402 I = IMD ? IMD->propimpl_begin() : CID->propimpl_begin(),
1403 E = IMD ? IMD->propimpl_end() : CID->propimpl_end();
1404 I != E; ++I) {
1405 RewritePropertyImplDecl(*I, IMD, CID);
1406 }
1407
1408 InsertText(IMD ? IMD->getLocEnd() : CID->getLocEnd(), "// ");
1409 }
1410
RewriteInterfaceDecl(ObjCInterfaceDecl * ClassDecl)1411 void RewriteModernObjC::RewriteInterfaceDecl(ObjCInterfaceDecl *ClassDecl) {
1412 // Do not synthesize more than once.
1413 if (ObjCSynthesizedStructs.count(ClassDecl))
1414 return;
1415 // Make sure super class's are written before current class is written.
1416 ObjCInterfaceDecl *SuperClass = ClassDecl->getSuperClass();
1417 while (SuperClass) {
1418 RewriteInterfaceDecl(SuperClass);
1419 SuperClass = SuperClass->getSuperClass();
1420 }
1421 std::string ResultStr;
1422 if (!ObjCWrittenInterfaces.count(ClassDecl->getCanonicalDecl())) {
1423 // we haven't seen a forward decl - generate a typedef.
1424 RewriteOneForwardClassDecl(ClassDecl, ResultStr);
1425 RewriteIvarOffsetSymbols(ClassDecl, ResultStr);
1426
1427 RewriteObjCInternalStruct(ClassDecl, ResultStr);
1428 // Mark this typedef as having been written into its c++ equivalent.
1429 ObjCWrittenInterfaces.insert(ClassDecl->getCanonicalDecl());
1430
1431 for (ObjCInterfaceDecl::prop_iterator I = ClassDecl->prop_begin(),
1432 E = ClassDecl->prop_end(); I != E; ++I)
1433 RewriteProperty(*I);
1434 for (ObjCInterfaceDecl::instmeth_iterator
1435 I = ClassDecl->instmeth_begin(), E = ClassDecl->instmeth_end();
1436 I != E; ++I)
1437 RewriteMethodDeclaration(*I);
1438 for (ObjCInterfaceDecl::classmeth_iterator
1439 I = ClassDecl->classmeth_begin(), E = ClassDecl->classmeth_end();
1440 I != E; ++I)
1441 RewriteMethodDeclaration(*I);
1442
1443 // Lastly, comment out the @end.
1444 ReplaceText(ClassDecl->getAtEndRange().getBegin(), strlen("@end"),
1445 "/* @end */\n");
1446 }
1447 }
1448
RewritePropertyOrImplicitSetter(PseudoObjectExpr * PseudoOp)1449 Stmt *RewriteModernObjC::RewritePropertyOrImplicitSetter(PseudoObjectExpr *PseudoOp) {
1450 SourceRange OldRange = PseudoOp->getSourceRange();
1451
1452 // We just magically know some things about the structure of this
1453 // expression.
1454 ObjCMessageExpr *OldMsg =
1455 cast<ObjCMessageExpr>(PseudoOp->getSemanticExpr(
1456 PseudoOp->getNumSemanticExprs() - 1));
1457
1458 // Because the rewriter doesn't allow us to rewrite rewritten code,
1459 // we need to suppress rewriting the sub-statements.
1460 Expr *Base;
1461 SmallVector<Expr*, 2> Args;
1462 {
1463 DisableReplaceStmtScope S(*this);
1464
1465 // Rebuild the base expression if we have one.
1466 Base = 0;
1467 if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1468 Base = OldMsg->getInstanceReceiver();
1469 Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
1470 Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
1471 }
1472
1473 unsigned numArgs = OldMsg->getNumArgs();
1474 for (unsigned i = 0; i < numArgs; i++) {
1475 Expr *Arg = OldMsg->getArg(i);
1476 if (isa<OpaqueValueExpr>(Arg))
1477 Arg = cast<OpaqueValueExpr>(Arg)->getSourceExpr();
1478 Arg = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Arg));
1479 Args.push_back(Arg);
1480 }
1481 }
1482
1483 // TODO: avoid this copy.
1484 SmallVector<SourceLocation, 1> SelLocs;
1485 OldMsg->getSelectorLocs(SelLocs);
1486
1487 ObjCMessageExpr *NewMsg = 0;
1488 switch (OldMsg->getReceiverKind()) {
1489 case ObjCMessageExpr::Class:
1490 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1491 OldMsg->getValueKind(),
1492 OldMsg->getLeftLoc(),
1493 OldMsg->getClassReceiverTypeInfo(),
1494 OldMsg->getSelector(),
1495 SelLocs,
1496 OldMsg->getMethodDecl(),
1497 Args,
1498 OldMsg->getRightLoc(),
1499 OldMsg->isImplicit());
1500 break;
1501
1502 case ObjCMessageExpr::Instance:
1503 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1504 OldMsg->getValueKind(),
1505 OldMsg->getLeftLoc(),
1506 Base,
1507 OldMsg->getSelector(),
1508 SelLocs,
1509 OldMsg->getMethodDecl(),
1510 Args,
1511 OldMsg->getRightLoc(),
1512 OldMsg->isImplicit());
1513 break;
1514
1515 case ObjCMessageExpr::SuperClass:
1516 case ObjCMessageExpr::SuperInstance:
1517 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1518 OldMsg->getValueKind(),
1519 OldMsg->getLeftLoc(),
1520 OldMsg->getSuperLoc(),
1521 OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1522 OldMsg->getSuperType(),
1523 OldMsg->getSelector(),
1524 SelLocs,
1525 OldMsg->getMethodDecl(),
1526 Args,
1527 OldMsg->getRightLoc(),
1528 OldMsg->isImplicit());
1529 break;
1530 }
1531
1532 Stmt *Replacement = SynthMessageExpr(NewMsg);
1533 ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
1534 return Replacement;
1535 }
1536
RewritePropertyOrImplicitGetter(PseudoObjectExpr * PseudoOp)1537 Stmt *RewriteModernObjC::RewritePropertyOrImplicitGetter(PseudoObjectExpr *PseudoOp) {
1538 SourceRange OldRange = PseudoOp->getSourceRange();
1539
1540 // We just magically know some things about the structure of this
1541 // expression.
1542 ObjCMessageExpr *OldMsg =
1543 cast<ObjCMessageExpr>(PseudoOp->getResultExpr()->IgnoreImplicit());
1544
1545 // Because the rewriter doesn't allow us to rewrite rewritten code,
1546 // we need to suppress rewriting the sub-statements.
1547 Expr *Base = 0;
1548 SmallVector<Expr*, 1> Args;
1549 {
1550 DisableReplaceStmtScope S(*this);
1551 // Rebuild the base expression if we have one.
1552 if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1553 Base = OldMsg->getInstanceReceiver();
1554 Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
1555 Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
1556 }
1557 unsigned numArgs = OldMsg->getNumArgs();
1558 for (unsigned i = 0; i < numArgs; i++) {
1559 Expr *Arg = OldMsg->getArg(i);
1560 if (isa<OpaqueValueExpr>(Arg))
1561 Arg = cast<OpaqueValueExpr>(Arg)->getSourceExpr();
1562 Arg = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Arg));
1563 Args.push_back(Arg);
1564 }
1565 }
1566
1567 // Intentionally empty.
1568 SmallVector<SourceLocation, 1> SelLocs;
1569
1570 ObjCMessageExpr *NewMsg = 0;
1571 switch (OldMsg->getReceiverKind()) {
1572 case ObjCMessageExpr::Class:
1573 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1574 OldMsg->getValueKind(),
1575 OldMsg->getLeftLoc(),
1576 OldMsg->getClassReceiverTypeInfo(),
1577 OldMsg->getSelector(),
1578 SelLocs,
1579 OldMsg->getMethodDecl(),
1580 Args,
1581 OldMsg->getRightLoc(),
1582 OldMsg->isImplicit());
1583 break;
1584
1585 case ObjCMessageExpr::Instance:
1586 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1587 OldMsg->getValueKind(),
1588 OldMsg->getLeftLoc(),
1589 Base,
1590 OldMsg->getSelector(),
1591 SelLocs,
1592 OldMsg->getMethodDecl(),
1593 Args,
1594 OldMsg->getRightLoc(),
1595 OldMsg->isImplicit());
1596 break;
1597
1598 case ObjCMessageExpr::SuperClass:
1599 case ObjCMessageExpr::SuperInstance:
1600 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1601 OldMsg->getValueKind(),
1602 OldMsg->getLeftLoc(),
1603 OldMsg->getSuperLoc(),
1604 OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1605 OldMsg->getSuperType(),
1606 OldMsg->getSelector(),
1607 SelLocs,
1608 OldMsg->getMethodDecl(),
1609 Args,
1610 OldMsg->getRightLoc(),
1611 OldMsg->isImplicit());
1612 break;
1613 }
1614
1615 Stmt *Replacement = SynthMessageExpr(NewMsg);
1616 ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
1617 return Replacement;
1618 }
1619
1620 /// SynthCountByEnumWithState - To print:
1621 /// ((unsigned int (*)
1622 /// (id, SEL, struct __objcFastEnumerationState *, id *, unsigned int))
1623 /// (void *)objc_msgSend)((id)l_collection,
1624 /// sel_registerName(
1625 /// "countByEnumeratingWithState:objects:count:"),
1626 /// &enumState,
1627 /// (id *)__rw_items, (unsigned int)16)
1628 ///
SynthCountByEnumWithState(std::string & buf)1629 void RewriteModernObjC::SynthCountByEnumWithState(std::string &buf) {
1630 buf += "((unsigned int (*) (id, SEL, struct __objcFastEnumerationState *, "
1631 "id *, unsigned int))(void *)objc_msgSend)";
1632 buf += "\n\t\t";
1633 buf += "((id)l_collection,\n\t\t";
1634 buf += "sel_registerName(\"countByEnumeratingWithState:objects:count:\"),";
1635 buf += "\n\t\t";
1636 buf += "&enumState, "
1637 "(id *)__rw_items, (unsigned int)16)";
1638 }
1639
1640 /// RewriteBreakStmt - Rewrite for a break-stmt inside an ObjC2's foreach
1641 /// statement to exit to its outer synthesized loop.
1642 ///
RewriteBreakStmt(BreakStmt * S)1643 Stmt *RewriteModernObjC::RewriteBreakStmt(BreakStmt *S) {
1644 if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
1645 return S;
1646 // replace break with goto __break_label
1647 std::string buf;
1648
1649 SourceLocation startLoc = S->getLocStart();
1650 buf = "goto __break_label_";
1651 buf += utostr(ObjCBcLabelNo.back());
1652 ReplaceText(startLoc, strlen("break"), buf);
1653
1654 return 0;
1655 }
1656
ConvertSourceLocationToLineDirective(SourceLocation Loc,std::string & LineString)1657 void RewriteModernObjC::ConvertSourceLocationToLineDirective(
1658 SourceLocation Loc,
1659 std::string &LineString) {
1660 if (Loc.isFileID() && GenerateLineInfo) {
1661 LineString += "\n#line ";
1662 PresumedLoc PLoc = SM->getPresumedLoc(Loc);
1663 LineString += utostr(PLoc.getLine());
1664 LineString += " \"";
1665 LineString += Lexer::Stringify(PLoc.getFilename());
1666 LineString += "\"\n";
1667 }
1668 }
1669
1670 /// RewriteContinueStmt - Rewrite for a continue-stmt inside an ObjC2's foreach
1671 /// statement to continue with its inner synthesized loop.
1672 ///
RewriteContinueStmt(ContinueStmt * S)1673 Stmt *RewriteModernObjC::RewriteContinueStmt(ContinueStmt *S) {
1674 if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
1675 return S;
1676 // replace continue with goto __continue_label
1677 std::string buf;
1678
1679 SourceLocation startLoc = S->getLocStart();
1680 buf = "goto __continue_label_";
1681 buf += utostr(ObjCBcLabelNo.back());
1682 ReplaceText(startLoc, strlen("continue"), buf);
1683
1684 return 0;
1685 }
1686
1687 /// RewriteObjCForCollectionStmt - Rewriter for ObjC2's foreach statement.
1688 /// It rewrites:
1689 /// for ( type elem in collection) { stmts; }
1690
1691 /// Into:
1692 /// {
1693 /// type elem;
1694 /// struct __objcFastEnumerationState enumState = { 0 };
1695 /// id __rw_items[16];
1696 /// id l_collection = (id)collection;
1697 /// unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
1698 /// objects:__rw_items count:16];
1699 /// if (limit) {
1700 /// unsigned long startMutations = *enumState.mutationsPtr;
1701 /// do {
1702 /// unsigned long counter = 0;
1703 /// do {
1704 /// if (startMutations != *enumState.mutationsPtr)
1705 /// objc_enumerationMutation(l_collection);
1706 /// elem = (type)enumState.itemsPtr[counter++];
1707 /// stmts;
1708 /// __continue_label: ;
1709 /// } while (counter < limit);
1710 /// } while (limit = [l_collection countByEnumeratingWithState:&enumState
1711 /// objects:__rw_items count:16]);
1712 /// elem = nil;
1713 /// __break_label: ;
1714 /// }
1715 /// else
1716 /// elem = nil;
1717 /// }
1718 ///
RewriteObjCForCollectionStmt(ObjCForCollectionStmt * S,SourceLocation OrigEnd)1719 Stmt *RewriteModernObjC::RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
1720 SourceLocation OrigEnd) {
1721 assert(!Stmts.empty() && "ObjCForCollectionStmt - Statement stack empty");
1722 assert(isa<ObjCForCollectionStmt>(Stmts.back()) &&
1723 "ObjCForCollectionStmt Statement stack mismatch");
1724 assert(!ObjCBcLabelNo.empty() &&
1725 "ObjCForCollectionStmt - Label No stack empty");
1726
1727 SourceLocation startLoc = S->getLocStart();
1728 const char *startBuf = SM->getCharacterData(startLoc);
1729 StringRef elementName;
1730 std::string elementTypeAsString;
1731 std::string buf;
1732 // line directive first.
1733 SourceLocation ForEachLoc = S->getForLoc();
1734 ConvertSourceLocationToLineDirective(ForEachLoc, buf);
1735 buf += "{\n\t";
1736 if (DeclStmt *DS = dyn_cast<DeclStmt>(S->getElement())) {
1737 // type elem;
1738 NamedDecl* D = cast<NamedDecl>(DS->getSingleDecl());
1739 QualType ElementType = cast<ValueDecl>(D)->getType();
1740 if (ElementType->isObjCQualifiedIdType() ||
1741 ElementType->isObjCQualifiedInterfaceType())
1742 // Simply use 'id' for all qualified types.
1743 elementTypeAsString = "id";
1744 else
1745 elementTypeAsString = ElementType.getAsString(Context->getPrintingPolicy());
1746 buf += elementTypeAsString;
1747 buf += " ";
1748 elementName = D->getName();
1749 buf += elementName;
1750 buf += ";\n\t";
1751 }
1752 else {
1753 DeclRefExpr *DR = cast<DeclRefExpr>(S->getElement());
1754 elementName = DR->getDecl()->getName();
1755 ValueDecl *VD = cast<ValueDecl>(DR->getDecl());
1756 if (VD->getType()->isObjCQualifiedIdType() ||
1757 VD->getType()->isObjCQualifiedInterfaceType())
1758 // Simply use 'id' for all qualified types.
1759 elementTypeAsString = "id";
1760 else
1761 elementTypeAsString = VD->getType().getAsString(Context->getPrintingPolicy());
1762 }
1763
1764 // struct __objcFastEnumerationState enumState = { 0 };
1765 buf += "struct __objcFastEnumerationState enumState = { 0 };\n\t";
1766 // id __rw_items[16];
1767 buf += "id __rw_items[16];\n\t";
1768 // id l_collection = (id)
1769 buf += "id l_collection = (id)";
1770 // Find start location of 'collection' the hard way!
1771 const char *startCollectionBuf = startBuf;
1772 startCollectionBuf += 3; // skip 'for'
1773 startCollectionBuf = strchr(startCollectionBuf, '(');
1774 startCollectionBuf++; // skip '('
1775 // find 'in' and skip it.
1776 while (*startCollectionBuf != ' ' ||
1777 *(startCollectionBuf+1) != 'i' || *(startCollectionBuf+2) != 'n' ||
1778 (*(startCollectionBuf+3) != ' ' &&
1779 *(startCollectionBuf+3) != '[' && *(startCollectionBuf+3) != '('))
1780 startCollectionBuf++;
1781 startCollectionBuf += 3;
1782
1783 // Replace: "for (type element in" with string constructed thus far.
1784 ReplaceText(startLoc, startCollectionBuf - startBuf, buf);
1785 // Replace ')' in for '(' type elem in collection ')' with ';'
1786 SourceLocation rightParenLoc = S->getRParenLoc();
1787 const char *rparenBuf = SM->getCharacterData(rightParenLoc);
1788 SourceLocation lparenLoc = startLoc.getLocWithOffset(rparenBuf-startBuf);
1789 buf = ";\n\t";
1790
1791 // unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
1792 // objects:__rw_items count:16];
1793 // which is synthesized into:
1794 // unsigned int limit =
1795 // ((unsigned int (*)
1796 // (id, SEL, struct __objcFastEnumerationState *, id *, unsigned int))
1797 // (void *)objc_msgSend)((id)l_collection,
1798 // sel_registerName(
1799 // "countByEnumeratingWithState:objects:count:"),
1800 // (struct __objcFastEnumerationState *)&state,
1801 // (id *)__rw_items, (unsigned int)16);
1802 buf += "unsigned long limit =\n\t\t";
1803 SynthCountByEnumWithState(buf);
1804 buf += ";\n\t";
1805 /// if (limit) {
1806 /// unsigned long startMutations = *enumState.mutationsPtr;
1807 /// do {
1808 /// unsigned long counter = 0;
1809 /// do {
1810 /// if (startMutations != *enumState.mutationsPtr)
1811 /// objc_enumerationMutation(l_collection);
1812 /// elem = (type)enumState.itemsPtr[counter++];
1813 buf += "if (limit) {\n\t";
1814 buf += "unsigned long startMutations = *enumState.mutationsPtr;\n\t";
1815 buf += "do {\n\t\t";
1816 buf += "unsigned long counter = 0;\n\t\t";
1817 buf += "do {\n\t\t\t";
1818 buf += "if (startMutations != *enumState.mutationsPtr)\n\t\t\t\t";
1819 buf += "objc_enumerationMutation(l_collection);\n\t\t\t";
1820 buf += elementName;
1821 buf += " = (";
1822 buf += elementTypeAsString;
1823 buf += ")enumState.itemsPtr[counter++];";
1824 // Replace ')' in for '(' type elem in collection ')' with all of these.
1825 ReplaceText(lparenLoc, 1, buf);
1826
1827 /// __continue_label: ;
1828 /// } while (counter < limit);
1829 /// } while (limit = [l_collection countByEnumeratingWithState:&enumState
1830 /// objects:__rw_items count:16]);
1831 /// elem = nil;
1832 /// __break_label: ;
1833 /// }
1834 /// else
1835 /// elem = nil;
1836 /// }
1837 ///
1838 buf = ";\n\t";
1839 buf += "__continue_label_";
1840 buf += utostr(ObjCBcLabelNo.back());
1841 buf += ": ;";
1842 buf += "\n\t\t";
1843 buf += "} while (counter < limit);\n\t";
1844 buf += "} while (limit = ";
1845 SynthCountByEnumWithState(buf);
1846 buf += ");\n\t";
1847 buf += elementName;
1848 buf += " = ((";
1849 buf += elementTypeAsString;
1850 buf += ")0);\n\t";
1851 buf += "__break_label_";
1852 buf += utostr(ObjCBcLabelNo.back());
1853 buf += ": ;\n\t";
1854 buf += "}\n\t";
1855 buf += "else\n\t\t";
1856 buf += elementName;
1857 buf += " = ((";
1858 buf += elementTypeAsString;
1859 buf += ")0);\n\t";
1860 buf += "}\n";
1861
1862 // Insert all these *after* the statement body.
1863 // FIXME: If this should support Obj-C++, support CXXTryStmt
1864 if (isa<CompoundStmt>(S->getBody())) {
1865 SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(1);
1866 InsertText(endBodyLoc, buf);
1867 } else {
1868 /* Need to treat single statements specially. For example:
1869 *
1870 * for (A *a in b) if (stuff()) break;
1871 * for (A *a in b) xxxyy;
1872 *
1873 * The following code simply scans ahead to the semi to find the actual end.
1874 */
1875 const char *stmtBuf = SM->getCharacterData(OrigEnd);
1876 const char *semiBuf = strchr(stmtBuf, ';');
1877 assert(semiBuf && "Can't find ';'");
1878 SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(semiBuf-stmtBuf+1);
1879 InsertText(endBodyLoc, buf);
1880 }
1881 Stmts.pop_back();
1882 ObjCBcLabelNo.pop_back();
1883 return 0;
1884 }
1885
Write_RethrowObject(std::string & buf)1886 static void Write_RethrowObject(std::string &buf) {
1887 buf += "{ struct _FIN { _FIN(id reth) : rethrow(reth) {}\n";
1888 buf += "\t~_FIN() { if (rethrow) objc_exception_throw(rethrow); }\n";
1889 buf += "\tid rethrow;\n";
1890 buf += "\t} _fin_force_rethow(_rethrow);";
1891 }
1892
1893 /// RewriteObjCSynchronizedStmt -
1894 /// This routine rewrites @synchronized(expr) stmt;
1895 /// into:
1896 /// objc_sync_enter(expr);
1897 /// @try stmt @finally { objc_sync_exit(expr); }
1898 ///
RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt * S)1899 Stmt *RewriteModernObjC::RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
1900 // Get the start location and compute the semi location.
1901 SourceLocation startLoc = S->getLocStart();
1902 const char *startBuf = SM->getCharacterData(startLoc);
1903
1904 assert((*startBuf == '@') && "bogus @synchronized location");
1905
1906 std::string buf;
1907 SourceLocation SynchLoc = S->getAtSynchronizedLoc();
1908 ConvertSourceLocationToLineDirective(SynchLoc, buf);
1909 buf += "{ id _rethrow = 0; id _sync_obj = ";
1910
1911 const char *lparenBuf = startBuf;
1912 while (*lparenBuf != '(') lparenBuf++;
1913 ReplaceText(startLoc, lparenBuf-startBuf+1, buf);
1914
1915 buf = "; objc_sync_enter(_sync_obj);\n";
1916 buf += "try {\n\tstruct _SYNC_EXIT { _SYNC_EXIT(id arg) : sync_exit(arg) {}";
1917 buf += "\n\t~_SYNC_EXIT() {objc_sync_exit(sync_exit);}";
1918 buf += "\n\tid sync_exit;";
1919 buf += "\n\t} _sync_exit(_sync_obj);\n";
1920
1921 // We can't use S->getSynchExpr()->getLocEnd() to find the end location, since
1922 // the sync expression is typically a message expression that's already
1923 // been rewritten! (which implies the SourceLocation's are invalid).
1924 SourceLocation RParenExprLoc = S->getSynchBody()->getLocStart();
1925 const char *RParenExprLocBuf = SM->getCharacterData(RParenExprLoc);
1926 while (*RParenExprLocBuf != ')') RParenExprLocBuf--;
1927 RParenExprLoc = startLoc.getLocWithOffset(RParenExprLocBuf-startBuf);
1928
1929 SourceLocation LBranceLoc = S->getSynchBody()->getLocStart();
1930 const char *LBraceLocBuf = SM->getCharacterData(LBranceLoc);
1931 assert (*LBraceLocBuf == '{');
1932 ReplaceText(RParenExprLoc, (LBraceLocBuf - SM->getCharacterData(RParenExprLoc) + 1), buf);
1933
1934 SourceLocation startRBraceLoc = S->getSynchBody()->getLocEnd();
1935 assert((*SM->getCharacterData(startRBraceLoc) == '}') &&
1936 "bogus @synchronized block");
1937
1938 buf = "} catch (id e) {_rethrow = e;}\n";
1939 Write_RethrowObject(buf);
1940 buf += "}\n";
1941 buf += "}\n";
1942
1943 ReplaceText(startRBraceLoc, 1, buf);
1944
1945 return 0;
1946 }
1947
WarnAboutReturnGotoStmts(Stmt * S)1948 void RewriteModernObjC::WarnAboutReturnGotoStmts(Stmt *S)
1949 {
1950 // Perform a bottom up traversal of all children.
1951 for (Stmt::child_range CI = S->children(); CI; ++CI)
1952 if (*CI)
1953 WarnAboutReturnGotoStmts(*CI);
1954
1955 if (isa<ReturnStmt>(S) || isa<GotoStmt>(S)) {
1956 Diags.Report(Context->getFullLoc(S->getLocStart()),
1957 TryFinallyContainsReturnDiag);
1958 }
1959 return;
1960 }
1961
RewriteObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt * S)1962 Stmt *RewriteModernObjC::RewriteObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S) {
1963 SourceLocation startLoc = S->getAtLoc();
1964 ReplaceText(startLoc, strlen("@autoreleasepool"), "/* @autoreleasepool */");
1965 ReplaceText(S->getSubStmt()->getLocStart(), 1,
1966 "{ __AtAutoreleasePool __autoreleasepool; ");
1967
1968 return 0;
1969 }
1970
RewriteObjCTryStmt(ObjCAtTryStmt * S)1971 Stmt *RewriteModernObjC::RewriteObjCTryStmt(ObjCAtTryStmt *S) {
1972 ObjCAtFinallyStmt *finalStmt = S->getFinallyStmt();
1973 bool noCatch = S->getNumCatchStmts() == 0;
1974 std::string buf;
1975 SourceLocation TryLocation = S->getAtTryLoc();
1976 ConvertSourceLocationToLineDirective(TryLocation, buf);
1977
1978 if (finalStmt) {
1979 if (noCatch)
1980 buf += "{ id volatile _rethrow = 0;\n";
1981 else {
1982 buf += "{ id volatile _rethrow = 0;\ntry {\n";
1983 }
1984 }
1985 // Get the start location and compute the semi location.
1986 SourceLocation startLoc = S->getLocStart();
1987 const char *startBuf = SM->getCharacterData(startLoc);
1988
1989 assert((*startBuf == '@') && "bogus @try location");
1990 if (finalStmt)
1991 ReplaceText(startLoc, 1, buf);
1992 else
1993 // @try -> try
1994 ReplaceText(startLoc, 1, "");
1995
1996 for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I) {
1997 ObjCAtCatchStmt *Catch = S->getCatchStmt(I);
1998 VarDecl *catchDecl = Catch->getCatchParamDecl();
1999
2000 startLoc = Catch->getLocStart();
2001 bool AtRemoved = false;
2002 if (catchDecl) {
2003 QualType t = catchDecl->getType();
2004 if (const ObjCObjectPointerType *Ptr = t->getAs<ObjCObjectPointerType>()) {
2005 // Should be a pointer to a class.
2006 ObjCInterfaceDecl *IDecl = Ptr->getObjectType()->getInterface();
2007 if (IDecl) {
2008 std::string Result;
2009 ConvertSourceLocationToLineDirective(Catch->getLocStart(), Result);
2010
2011 startBuf = SM->getCharacterData(startLoc);
2012 assert((*startBuf == '@') && "bogus @catch location");
2013 SourceLocation rParenLoc = Catch->getRParenLoc();
2014 const char *rParenBuf = SM->getCharacterData(rParenLoc);
2015
2016 // _objc_exc_Foo *_e as argument to catch.
2017 Result += "catch (_objc_exc_"; Result += IDecl->getNameAsString();
2018 Result += " *_"; Result += catchDecl->getNameAsString();
2019 Result += ")";
2020 ReplaceText(startLoc, rParenBuf-startBuf+1, Result);
2021 // Foo *e = (Foo *)_e;
2022 Result.clear();
2023 Result = "{ ";
2024 Result += IDecl->getNameAsString();
2025 Result += " *"; Result += catchDecl->getNameAsString();
2026 Result += " = ("; Result += IDecl->getNameAsString(); Result += "*)";
2027 Result += "_"; Result += catchDecl->getNameAsString();
2028
2029 Result += "; ";
2030 SourceLocation lBraceLoc = Catch->getCatchBody()->getLocStart();
2031 ReplaceText(lBraceLoc, 1, Result);
2032 AtRemoved = true;
2033 }
2034 }
2035 }
2036 if (!AtRemoved)
2037 // @catch -> catch
2038 ReplaceText(startLoc, 1, "");
2039
2040 }
2041 if (finalStmt) {
2042 buf.clear();
2043 SourceLocation FinallyLoc = finalStmt->getLocStart();
2044
2045 if (noCatch) {
2046 ConvertSourceLocationToLineDirective(FinallyLoc, buf);
2047 buf += "catch (id e) {_rethrow = e;}\n";
2048 }
2049 else {
2050 buf += "}\n";
2051 ConvertSourceLocationToLineDirective(FinallyLoc, buf);
2052 buf += "catch (id e) {_rethrow = e;}\n";
2053 }
2054
2055 SourceLocation startFinalLoc = finalStmt->getLocStart();
2056 ReplaceText(startFinalLoc, 8, buf);
2057 Stmt *body = finalStmt->getFinallyBody();
2058 SourceLocation startFinalBodyLoc = body->getLocStart();
2059 buf.clear();
2060 Write_RethrowObject(buf);
2061 ReplaceText(startFinalBodyLoc, 1, buf);
2062
2063 SourceLocation endFinalBodyLoc = body->getLocEnd();
2064 ReplaceText(endFinalBodyLoc, 1, "}\n}");
2065 // Now check for any return/continue/go statements within the @try.
2066 WarnAboutReturnGotoStmts(S->getTryBody());
2067 }
2068
2069 return 0;
2070 }
2071
2072 // This can't be done with ReplaceStmt(S, ThrowExpr), since
2073 // the throw expression is typically a message expression that's already
2074 // been rewritten! (which implies the SourceLocation's are invalid).
RewriteObjCThrowStmt(ObjCAtThrowStmt * S)2075 Stmt *RewriteModernObjC::RewriteObjCThrowStmt(ObjCAtThrowStmt *S) {
2076 // Get the start location and compute the semi location.
2077 SourceLocation startLoc = S->getLocStart();
2078 const char *startBuf = SM->getCharacterData(startLoc);
2079
2080 assert((*startBuf == '@') && "bogus @throw location");
2081
2082 std::string buf;
2083 /* void objc_exception_throw(id) __attribute__((noreturn)); */
2084 if (S->getThrowExpr())
2085 buf = "objc_exception_throw(";
2086 else
2087 buf = "throw";
2088
2089 // handle "@ throw" correctly.
2090 const char *wBuf = strchr(startBuf, 'w');
2091 assert((*wBuf == 'w') && "@throw: can't find 'w'");
2092 ReplaceText(startLoc, wBuf-startBuf+1, buf);
2093
2094 SourceLocation endLoc = S->getLocEnd();
2095 const char *endBuf = SM->getCharacterData(endLoc);
2096 const char *semiBuf = strchr(endBuf, ';');
2097 assert((*semiBuf == ';') && "@throw: can't find ';'");
2098 SourceLocation semiLoc = startLoc.getLocWithOffset(semiBuf-startBuf);
2099 if (S->getThrowExpr())
2100 ReplaceText(semiLoc, 1, ");");
2101 return 0;
2102 }
2103
RewriteAtEncode(ObjCEncodeExpr * Exp)2104 Stmt *RewriteModernObjC::RewriteAtEncode(ObjCEncodeExpr *Exp) {
2105 // Create a new string expression.
2106 QualType StrType = Context->getPointerType(Context->CharTy);
2107 std::string StrEncoding;
2108 Context->getObjCEncodingForType(Exp->getEncodedType(), StrEncoding);
2109 Expr *Replacement = StringLiteral::Create(*Context, StrEncoding,
2110 StringLiteral::Ascii, false,
2111 StrType, SourceLocation());
2112 ReplaceStmt(Exp, Replacement);
2113
2114 // Replace this subexpr in the parent.
2115 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2116 return Replacement;
2117 }
2118
RewriteAtSelector(ObjCSelectorExpr * Exp)2119 Stmt *RewriteModernObjC::RewriteAtSelector(ObjCSelectorExpr *Exp) {
2120 if (!SelGetUidFunctionDecl)
2121 SynthSelGetUidFunctionDecl();
2122 assert(SelGetUidFunctionDecl && "Can't find sel_registerName() decl");
2123 // Create a call to sel_registerName("selName").
2124 SmallVector<Expr*, 8> SelExprs;
2125 QualType argType = Context->getPointerType(Context->CharTy);
2126 SelExprs.push_back(StringLiteral::Create(*Context,
2127 Exp->getSelector().getAsString(),
2128 StringLiteral::Ascii, false,
2129 argType, SourceLocation()));
2130 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2131 &SelExprs[0], SelExprs.size());
2132 ReplaceStmt(Exp, SelExp);
2133 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2134 return SelExp;
2135 }
2136
SynthesizeCallToFunctionDecl(FunctionDecl * FD,Expr ** args,unsigned nargs,SourceLocation StartLoc,SourceLocation EndLoc)2137 CallExpr *RewriteModernObjC::SynthesizeCallToFunctionDecl(
2138 FunctionDecl *FD, Expr **args, unsigned nargs, SourceLocation StartLoc,
2139 SourceLocation EndLoc) {
2140 // Get the type, we will need to reference it in a couple spots.
2141 QualType msgSendType = FD->getType();
2142
2143 // Create a reference to the objc_msgSend() declaration.
2144 DeclRefExpr *DRE =
2145 new (Context) DeclRefExpr(FD, false, msgSendType, VK_LValue, SourceLocation());
2146
2147 // Now, we cast the reference to a pointer to the objc_msgSend type.
2148 QualType pToFunc = Context->getPointerType(msgSendType);
2149 ImplicitCastExpr *ICE =
2150 ImplicitCastExpr::Create(*Context, pToFunc, CK_FunctionToPointerDecay,
2151 DRE, 0, VK_RValue);
2152
2153 const FunctionType *FT = msgSendType->getAs<FunctionType>();
2154
2155 CallExpr *Exp =
2156 new (Context) CallExpr(*Context, ICE, llvm::makeArrayRef(args, nargs),
2157 FT->getCallResultType(*Context),
2158 VK_RValue, EndLoc);
2159 return Exp;
2160 }
2161
scanForProtocolRefs(const char * startBuf,const char * endBuf,const char * & startRef,const char * & endRef)2162 static bool scanForProtocolRefs(const char *startBuf, const char *endBuf,
2163 const char *&startRef, const char *&endRef) {
2164 while (startBuf < endBuf) {
2165 if (*startBuf == '<')
2166 startRef = startBuf; // mark the start.
2167 if (*startBuf == '>') {
2168 if (startRef && *startRef == '<') {
2169 endRef = startBuf; // mark the end.
2170 return true;
2171 }
2172 return false;
2173 }
2174 startBuf++;
2175 }
2176 return false;
2177 }
2178
scanToNextArgument(const char * & argRef)2179 static void scanToNextArgument(const char *&argRef) {
2180 int angle = 0;
2181 while (*argRef != ')' && (*argRef != ',' || angle > 0)) {
2182 if (*argRef == '<')
2183 angle++;
2184 else if (*argRef == '>')
2185 angle--;
2186 argRef++;
2187 }
2188 assert(angle == 0 && "scanToNextArgument - bad protocol type syntax");
2189 }
2190
needToScanForQualifiers(QualType T)2191 bool RewriteModernObjC::needToScanForQualifiers(QualType T) {
2192 if (T->isObjCQualifiedIdType())
2193 return true;
2194 if (const PointerType *PT = T->getAs<PointerType>()) {
2195 if (PT->getPointeeType()->isObjCQualifiedIdType())
2196 return true;
2197 }
2198 if (T->isObjCObjectPointerType()) {
2199 T = T->getPointeeType();
2200 return T->isObjCQualifiedInterfaceType();
2201 }
2202 if (T->isArrayType()) {
2203 QualType ElemTy = Context->getBaseElementType(T);
2204 return needToScanForQualifiers(ElemTy);
2205 }
2206 return false;
2207 }
2208
RewriteObjCQualifiedInterfaceTypes(Expr * E)2209 void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Expr *E) {
2210 QualType Type = E->getType();
2211 if (needToScanForQualifiers(Type)) {
2212 SourceLocation Loc, EndLoc;
2213
2214 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E)) {
2215 Loc = ECE->getLParenLoc();
2216 EndLoc = ECE->getRParenLoc();
2217 } else {
2218 Loc = E->getLocStart();
2219 EndLoc = E->getLocEnd();
2220 }
2221 // This will defend against trying to rewrite synthesized expressions.
2222 if (Loc.isInvalid() || EndLoc.isInvalid())
2223 return;
2224
2225 const char *startBuf = SM->getCharacterData(Loc);
2226 const char *endBuf = SM->getCharacterData(EndLoc);
2227 const char *startRef = 0, *endRef = 0;
2228 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2229 // Get the locations of the startRef, endRef.
2230 SourceLocation LessLoc = Loc.getLocWithOffset(startRef-startBuf);
2231 SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-startBuf+1);
2232 // Comment out the protocol references.
2233 InsertText(LessLoc, "/*");
2234 InsertText(GreaterLoc, "*/");
2235 }
2236 }
2237 }
2238
RewriteObjCQualifiedInterfaceTypes(Decl * Dcl)2239 void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Decl *Dcl) {
2240 SourceLocation Loc;
2241 QualType Type;
2242 const FunctionProtoType *proto = 0;
2243 if (VarDecl *VD = dyn_cast<VarDecl>(Dcl)) {
2244 Loc = VD->getLocation();
2245 Type = VD->getType();
2246 }
2247 else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Dcl)) {
2248 Loc = FD->getLocation();
2249 // Check for ObjC 'id' and class types that have been adorned with protocol
2250 // information (id<p>, C<p>*). The protocol references need to be rewritten!
2251 const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2252 assert(funcType && "missing function type");
2253 proto = dyn_cast<FunctionProtoType>(funcType);
2254 if (!proto)
2255 return;
2256 Type = proto->getResultType();
2257 }
2258 else if (FieldDecl *FD = dyn_cast<FieldDecl>(Dcl)) {
2259 Loc = FD->getLocation();
2260 Type = FD->getType();
2261 }
2262 else if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(Dcl)) {
2263 Loc = TD->getLocation();
2264 Type = TD->getUnderlyingType();
2265 }
2266 else
2267 return;
2268
2269 if (needToScanForQualifiers(Type)) {
2270 // Since types are unique, we need to scan the buffer.
2271
2272 const char *endBuf = SM->getCharacterData(Loc);
2273 const char *startBuf = endBuf;
2274 while (*startBuf != ';' && *startBuf != '<' && startBuf != MainFileStart)
2275 startBuf--; // scan backward (from the decl location) for return type.
2276 const char *startRef = 0, *endRef = 0;
2277 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2278 // Get the locations of the startRef, endRef.
2279 SourceLocation LessLoc = Loc.getLocWithOffset(startRef-endBuf);
2280 SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-endBuf+1);
2281 // Comment out the protocol references.
2282 InsertText(LessLoc, "/*");
2283 InsertText(GreaterLoc, "*/");
2284 }
2285 }
2286 if (!proto)
2287 return; // most likely, was a variable
2288 // Now check arguments.
2289 const char *startBuf = SM->getCharacterData(Loc);
2290 const char *startFuncBuf = startBuf;
2291 for (unsigned i = 0; i < proto->getNumArgs(); i++) {
2292 if (needToScanForQualifiers(proto->getArgType(i))) {
2293 // Since types are unique, we need to scan the buffer.
2294
2295 const char *endBuf = startBuf;
2296 // scan forward (from the decl location) for argument types.
2297 scanToNextArgument(endBuf);
2298 const char *startRef = 0, *endRef = 0;
2299 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2300 // Get the locations of the startRef, endRef.
2301 SourceLocation LessLoc =
2302 Loc.getLocWithOffset(startRef-startFuncBuf);
2303 SourceLocation GreaterLoc =
2304 Loc.getLocWithOffset(endRef-startFuncBuf+1);
2305 // Comment out the protocol references.
2306 InsertText(LessLoc, "/*");
2307 InsertText(GreaterLoc, "*/");
2308 }
2309 startBuf = ++endBuf;
2310 }
2311 else {
2312 // If the function name is derived from a macro expansion, then the
2313 // argument buffer will not follow the name. Need to speak with Chris.
2314 while (*startBuf && *startBuf != ')' && *startBuf != ',')
2315 startBuf++; // scan forward (from the decl location) for argument types.
2316 startBuf++;
2317 }
2318 }
2319 }
2320
RewriteTypeOfDecl(VarDecl * ND)2321 void RewriteModernObjC::RewriteTypeOfDecl(VarDecl *ND) {
2322 QualType QT = ND->getType();
2323 const Type* TypePtr = QT->getAs<Type>();
2324 if (!isa<TypeOfExprType>(TypePtr))
2325 return;
2326 while (isa<TypeOfExprType>(TypePtr)) {
2327 const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
2328 QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
2329 TypePtr = QT->getAs<Type>();
2330 }
2331 // FIXME. This will not work for multiple declarators; as in:
2332 // __typeof__(a) b,c,d;
2333 std::string TypeAsString(QT.getAsString(Context->getPrintingPolicy()));
2334 SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
2335 const char *startBuf = SM->getCharacterData(DeclLoc);
2336 if (ND->getInit()) {
2337 std::string Name(ND->getNameAsString());
2338 TypeAsString += " " + Name + " = ";
2339 Expr *E = ND->getInit();
2340 SourceLocation startLoc;
2341 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
2342 startLoc = ECE->getLParenLoc();
2343 else
2344 startLoc = E->getLocStart();
2345 startLoc = SM->getExpansionLoc(startLoc);
2346 const char *endBuf = SM->getCharacterData(startLoc);
2347 ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
2348 }
2349 else {
2350 SourceLocation X = ND->getLocEnd();
2351 X = SM->getExpansionLoc(X);
2352 const char *endBuf = SM->getCharacterData(X);
2353 ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
2354 }
2355 }
2356
2357 // SynthSelGetUidFunctionDecl - SEL sel_registerName(const char *str);
SynthSelGetUidFunctionDecl()2358 void RewriteModernObjC::SynthSelGetUidFunctionDecl() {
2359 IdentifierInfo *SelGetUidIdent = &Context->Idents.get("sel_registerName");
2360 SmallVector<QualType, 16> ArgTys;
2361 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2362 QualType getFuncType =
2363 getSimpleFunctionType(Context->getObjCSelType(), ArgTys);
2364 SelGetUidFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2365 SourceLocation(),
2366 SourceLocation(),
2367 SelGetUidIdent, getFuncType, 0,
2368 SC_Extern);
2369 }
2370
RewriteFunctionDecl(FunctionDecl * FD)2371 void RewriteModernObjC::RewriteFunctionDecl(FunctionDecl *FD) {
2372 // declared in <objc/objc.h>
2373 if (FD->getIdentifier() &&
2374 FD->getName() == "sel_registerName") {
2375 SelGetUidFunctionDecl = FD;
2376 return;
2377 }
2378 RewriteObjCQualifiedInterfaceTypes(FD);
2379 }
2380
RewriteBlockPointerType(std::string & Str,QualType Type)2381 void RewriteModernObjC::RewriteBlockPointerType(std::string& Str, QualType Type) {
2382 std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
2383 const char *argPtr = TypeString.c_str();
2384 if (!strchr(argPtr, '^')) {
2385 Str += TypeString;
2386 return;
2387 }
2388 while (*argPtr) {
2389 Str += (*argPtr == '^' ? '*' : *argPtr);
2390 argPtr++;
2391 }
2392 }
2393
2394 // FIXME. Consolidate this routine with RewriteBlockPointerType.
RewriteBlockPointerTypeVariable(std::string & Str,ValueDecl * VD)2395 void RewriteModernObjC::RewriteBlockPointerTypeVariable(std::string& Str,
2396 ValueDecl *VD) {
2397 QualType Type = VD->getType();
2398 std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
2399 const char *argPtr = TypeString.c_str();
2400 int paren = 0;
2401 while (*argPtr) {
2402 switch (*argPtr) {
2403 case '(':
2404 Str += *argPtr;
2405 paren++;
2406 break;
2407 case ')':
2408 Str += *argPtr;
2409 paren--;
2410 break;
2411 case '^':
2412 Str += '*';
2413 if (paren == 1)
2414 Str += VD->getNameAsString();
2415 break;
2416 default:
2417 Str += *argPtr;
2418 break;
2419 }
2420 argPtr++;
2421 }
2422 }
2423
RewriteBlockLiteralFunctionDecl(FunctionDecl * FD)2424 void RewriteModernObjC::RewriteBlockLiteralFunctionDecl(FunctionDecl *FD) {
2425 SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
2426 const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2427 const FunctionProtoType *proto = dyn_cast<FunctionProtoType>(funcType);
2428 if (!proto)
2429 return;
2430 QualType Type = proto->getResultType();
2431 std::string FdStr = Type.getAsString(Context->getPrintingPolicy());
2432 FdStr += " ";
2433 FdStr += FD->getName();
2434 FdStr += "(";
2435 unsigned numArgs = proto->getNumArgs();
2436 for (unsigned i = 0; i < numArgs; i++) {
2437 QualType ArgType = proto->getArgType(i);
2438 RewriteBlockPointerType(FdStr, ArgType);
2439 if (i+1 < numArgs)
2440 FdStr += ", ";
2441 }
2442 if (FD->isVariadic()) {
2443 FdStr += (numArgs > 0) ? ", ...);\n" : "...);\n";
2444 }
2445 else
2446 FdStr += ");\n";
2447 InsertText(FunLocStart, FdStr);
2448 }
2449
2450 // SynthSuperContructorFunctionDecl - id __rw_objc_super(id obj, id super);
SynthSuperContructorFunctionDecl()2451 void RewriteModernObjC::SynthSuperContructorFunctionDecl() {
2452 if (SuperContructorFunctionDecl)
2453 return;
2454 IdentifierInfo *msgSendIdent = &Context->Idents.get("__rw_objc_super");
2455 SmallVector<QualType, 16> ArgTys;
2456 QualType argT = Context->getObjCIdType();
2457 assert(!argT.isNull() && "Can't find 'id' type");
2458 ArgTys.push_back(argT);
2459 ArgTys.push_back(argT);
2460 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2461 ArgTys);
2462 SuperContructorFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2463 SourceLocation(),
2464 SourceLocation(),
2465 msgSendIdent, msgSendType,
2466 0, SC_Extern);
2467 }
2468
2469 // SynthMsgSendFunctionDecl - id objc_msgSend(id self, SEL op, ...);
SynthMsgSendFunctionDecl()2470 void RewriteModernObjC::SynthMsgSendFunctionDecl() {
2471 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend");
2472 SmallVector<QualType, 16> ArgTys;
2473 QualType argT = Context->getObjCIdType();
2474 assert(!argT.isNull() && "Can't find 'id' type");
2475 ArgTys.push_back(argT);
2476 argT = Context->getObjCSelType();
2477 assert(!argT.isNull() && "Can't find 'SEL' type");
2478 ArgTys.push_back(argT);
2479 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2480 ArgTys, /*isVariadic=*/true);
2481 MsgSendFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2482 SourceLocation(),
2483 SourceLocation(),
2484 msgSendIdent, msgSendType, 0,
2485 SC_Extern);
2486 }
2487
2488 // SynthMsgSendSuperFunctionDecl - id objc_msgSendSuper(void);
SynthMsgSendSuperFunctionDecl()2489 void RewriteModernObjC::SynthMsgSendSuperFunctionDecl() {
2490 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSendSuper");
2491 SmallVector<QualType, 2> ArgTys;
2492 ArgTys.push_back(Context->VoidTy);
2493 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2494 ArgTys, /*isVariadic=*/true);
2495 MsgSendSuperFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2496 SourceLocation(),
2497 SourceLocation(),
2498 msgSendIdent, msgSendType, 0,
2499 SC_Extern);
2500 }
2501
2502 // SynthMsgSendStretFunctionDecl - id objc_msgSend_stret(id self, SEL op, ...);
SynthMsgSendStretFunctionDecl()2503 void RewriteModernObjC::SynthMsgSendStretFunctionDecl() {
2504 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_stret");
2505 SmallVector<QualType, 16> ArgTys;
2506 QualType argT = Context->getObjCIdType();
2507 assert(!argT.isNull() && "Can't find 'id' type");
2508 ArgTys.push_back(argT);
2509 argT = Context->getObjCSelType();
2510 assert(!argT.isNull() && "Can't find 'SEL' type");
2511 ArgTys.push_back(argT);
2512 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2513 ArgTys, /*isVariadic=*/true);
2514 MsgSendStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2515 SourceLocation(),
2516 SourceLocation(),
2517 msgSendIdent, msgSendType, 0,
2518 SC_Extern);
2519 }
2520
2521 // SynthMsgSendSuperStretFunctionDecl -
2522 // id objc_msgSendSuper_stret(void);
SynthMsgSendSuperStretFunctionDecl()2523 void RewriteModernObjC::SynthMsgSendSuperStretFunctionDecl() {
2524 IdentifierInfo *msgSendIdent =
2525 &Context->Idents.get("objc_msgSendSuper_stret");
2526 SmallVector<QualType, 2> ArgTys;
2527 ArgTys.push_back(Context->VoidTy);
2528 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2529 ArgTys, /*isVariadic=*/true);
2530 MsgSendSuperStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2531 SourceLocation(),
2532 SourceLocation(),
2533 msgSendIdent,
2534 msgSendType, 0,
2535 SC_Extern);
2536 }
2537
2538 // SynthMsgSendFpretFunctionDecl - double objc_msgSend_fpret(id self, SEL op, ...);
SynthMsgSendFpretFunctionDecl()2539 void RewriteModernObjC::SynthMsgSendFpretFunctionDecl() {
2540 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_fpret");
2541 SmallVector<QualType, 16> ArgTys;
2542 QualType argT = Context->getObjCIdType();
2543 assert(!argT.isNull() && "Can't find 'id' type");
2544 ArgTys.push_back(argT);
2545 argT = Context->getObjCSelType();
2546 assert(!argT.isNull() && "Can't find 'SEL' type");
2547 ArgTys.push_back(argT);
2548 QualType msgSendType = getSimpleFunctionType(Context->DoubleTy,
2549 ArgTys, /*isVariadic=*/true);
2550 MsgSendFpretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2551 SourceLocation(),
2552 SourceLocation(),
2553 msgSendIdent, msgSendType, 0,
2554 SC_Extern);
2555 }
2556
2557 // SynthGetClassFunctionDecl - Class objc_getClass(const char *name);
SynthGetClassFunctionDecl()2558 void RewriteModernObjC::SynthGetClassFunctionDecl() {
2559 IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getClass");
2560 SmallVector<QualType, 16> ArgTys;
2561 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2562 QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
2563 ArgTys);
2564 GetClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2565 SourceLocation(),
2566 SourceLocation(),
2567 getClassIdent, getClassType, 0,
2568 SC_Extern);
2569 }
2570
2571 // SynthGetSuperClassFunctionDecl - Class class_getSuperclass(Class cls);
SynthGetSuperClassFunctionDecl()2572 void RewriteModernObjC::SynthGetSuperClassFunctionDecl() {
2573 IdentifierInfo *getSuperClassIdent =
2574 &Context->Idents.get("class_getSuperclass");
2575 SmallVector<QualType, 16> ArgTys;
2576 ArgTys.push_back(Context->getObjCClassType());
2577 QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
2578 ArgTys);
2579 GetSuperClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2580 SourceLocation(),
2581 SourceLocation(),
2582 getSuperClassIdent,
2583 getClassType, 0,
2584 SC_Extern);
2585 }
2586
2587 // SynthGetMetaClassFunctionDecl - Class objc_getMetaClass(const char *name);
SynthGetMetaClassFunctionDecl()2588 void RewriteModernObjC::SynthGetMetaClassFunctionDecl() {
2589 IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getMetaClass");
2590 SmallVector<QualType, 16> ArgTys;
2591 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2592 QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
2593 ArgTys);
2594 GetMetaClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2595 SourceLocation(),
2596 SourceLocation(),
2597 getClassIdent, getClassType,
2598 0, SC_Extern);
2599 }
2600
RewriteObjCStringLiteral(ObjCStringLiteral * Exp)2601 Stmt *RewriteModernObjC::RewriteObjCStringLiteral(ObjCStringLiteral *Exp) {
2602 QualType strType = getConstantStringStructType();
2603
2604 std::string S = "__NSConstantStringImpl_";
2605
2606 std::string tmpName = InFileName;
2607 unsigned i;
2608 for (i=0; i < tmpName.length(); i++) {
2609 char c = tmpName.at(i);
2610 // replace any non alphanumeric characters with '_'.
2611 if (!isAlphanumeric(c))
2612 tmpName[i] = '_';
2613 }
2614 S += tmpName;
2615 S += "_";
2616 S += utostr(NumObjCStringLiterals++);
2617
2618 Preamble += "static __NSConstantStringImpl " + S;
2619 Preamble += " __attribute__ ((section (\"__DATA, __cfstring\"))) = {__CFConstantStringClassReference,";
2620 Preamble += "0x000007c8,"; // utf8_str
2621 // The pretty printer for StringLiteral handles escape characters properly.
2622 std::string prettyBufS;
2623 llvm::raw_string_ostream prettyBuf(prettyBufS);
2624 Exp->getString()->printPretty(prettyBuf, 0, PrintingPolicy(LangOpts));
2625 Preamble += prettyBuf.str();
2626 Preamble += ",";
2627 Preamble += utostr(Exp->getString()->getByteLength()) + "};\n";
2628
2629 VarDecl *NewVD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
2630 SourceLocation(), &Context->Idents.get(S),
2631 strType, 0, SC_Static);
2632 DeclRefExpr *DRE = new (Context) DeclRefExpr(NewVD, false, strType, VK_LValue,
2633 SourceLocation());
2634 Expr *Unop = new (Context) UnaryOperator(DRE, UO_AddrOf,
2635 Context->getPointerType(DRE->getType()),
2636 VK_RValue, OK_Ordinary,
2637 SourceLocation());
2638 // cast to NSConstantString *
2639 CastExpr *cast = NoTypeInfoCStyleCastExpr(Context, Exp->getType(),
2640 CK_CPointerToObjCPointerCast, Unop);
2641 ReplaceStmt(Exp, cast);
2642 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2643 return cast;
2644 }
2645
RewriteObjCBoolLiteralExpr(ObjCBoolLiteralExpr * Exp)2646 Stmt *RewriteModernObjC::RewriteObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Exp) {
2647 unsigned IntSize =
2648 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
2649
2650 Expr *FlagExp = IntegerLiteral::Create(*Context,
2651 llvm::APInt(IntSize, Exp->getValue()),
2652 Context->IntTy, Exp->getLocation());
2653 CastExpr *cast = NoTypeInfoCStyleCastExpr(Context, Context->ObjCBuiltinBoolTy,
2654 CK_BitCast, FlagExp);
2655 ParenExpr *PE = new (Context) ParenExpr(Exp->getLocation(), Exp->getExprLoc(),
2656 cast);
2657 ReplaceStmt(Exp, PE);
2658 return PE;
2659 }
2660
RewriteObjCBoxedExpr(ObjCBoxedExpr * Exp)2661 Stmt *RewriteModernObjC::RewriteObjCBoxedExpr(ObjCBoxedExpr *Exp) {
2662 // synthesize declaration of helper functions needed in this routine.
2663 if (!SelGetUidFunctionDecl)
2664 SynthSelGetUidFunctionDecl();
2665 // use objc_msgSend() for all.
2666 if (!MsgSendFunctionDecl)
2667 SynthMsgSendFunctionDecl();
2668 if (!GetClassFunctionDecl)
2669 SynthGetClassFunctionDecl();
2670
2671 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2672 SourceLocation StartLoc = Exp->getLocStart();
2673 SourceLocation EndLoc = Exp->getLocEnd();
2674
2675 // Synthesize a call to objc_msgSend().
2676 SmallVector<Expr*, 4> MsgExprs;
2677 SmallVector<Expr*, 4> ClsExprs;
2678 QualType argType = Context->getPointerType(Context->CharTy);
2679
2680 // Create a call to objc_getClass("<BoxingClass>"). It will be the 1st argument.
2681 ObjCMethodDecl *BoxingMethod = Exp->getBoxingMethod();
2682 ObjCInterfaceDecl *BoxingClass = BoxingMethod->getClassInterface();
2683
2684 IdentifierInfo *clsName = BoxingClass->getIdentifier();
2685 ClsExprs.push_back(StringLiteral::Create(*Context,
2686 clsName->getName(),
2687 StringLiteral::Ascii, false,
2688 argType, SourceLocation()));
2689 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl,
2690 &ClsExprs[0],
2691 ClsExprs.size(),
2692 StartLoc, EndLoc);
2693 MsgExprs.push_back(Cls);
2694
2695 // Create a call to sel_registerName("<BoxingMethod>:"), etc.
2696 // it will be the 2nd argument.
2697 SmallVector<Expr*, 4> SelExprs;
2698 SelExprs.push_back(StringLiteral::Create(*Context,
2699 BoxingMethod->getSelector().getAsString(),
2700 StringLiteral::Ascii, false,
2701 argType, SourceLocation()));
2702 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2703 &SelExprs[0], SelExprs.size(),
2704 StartLoc, EndLoc);
2705 MsgExprs.push_back(SelExp);
2706
2707 // User provided sub-expression is the 3rd, and last, argument.
2708 Expr *subExpr = Exp->getSubExpr();
2709 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(subExpr)) {
2710 QualType type = ICE->getType();
2711 const Expr *SubExpr = ICE->IgnoreParenImpCasts();
2712 CastKind CK = CK_BitCast;
2713 if (SubExpr->getType()->isIntegralType(*Context) && type->isBooleanType())
2714 CK = CK_IntegralToBoolean;
2715 subExpr = NoTypeInfoCStyleCastExpr(Context, type, CK, subExpr);
2716 }
2717 MsgExprs.push_back(subExpr);
2718
2719 SmallVector<QualType, 4> ArgTypes;
2720 ArgTypes.push_back(Context->getObjCIdType());
2721 ArgTypes.push_back(Context->getObjCSelType());
2722 for (ObjCMethodDecl::param_iterator PI = BoxingMethod->param_begin(),
2723 E = BoxingMethod->param_end(); PI != E; ++PI)
2724 ArgTypes.push_back((*PI)->getType());
2725
2726 QualType returnType = Exp->getType();
2727 // Get the type, we will need to reference it in a couple spots.
2728 QualType msgSendType = MsgSendFlavor->getType();
2729
2730 // Create a reference to the objc_msgSend() declaration.
2731 DeclRefExpr *DRE = new (Context) DeclRefExpr(MsgSendFlavor, false, msgSendType,
2732 VK_LValue, SourceLocation());
2733
2734 CastExpr *cast = NoTypeInfoCStyleCastExpr(Context,
2735 Context->getPointerType(Context->VoidTy),
2736 CK_BitCast, DRE);
2737
2738 // Now do the "normal" pointer to function cast.
2739 QualType castType =
2740 getSimpleFunctionType(returnType, ArgTypes, BoxingMethod->isVariadic());
2741 castType = Context->getPointerType(castType);
2742 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2743 cast);
2744
2745 // Don't forget the parens to enforce the proper binding.
2746 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2747
2748 const FunctionType *FT = msgSendType->getAs<FunctionType>();
2749 CallExpr *CE = new (Context) CallExpr(*Context, PE, MsgExprs,
2750 FT->getResultType(), VK_RValue,
2751 EndLoc);
2752 ReplaceStmt(Exp, CE);
2753 return CE;
2754 }
2755
RewriteObjCArrayLiteralExpr(ObjCArrayLiteral * Exp)2756 Stmt *RewriteModernObjC::RewriteObjCArrayLiteralExpr(ObjCArrayLiteral *Exp) {
2757 // synthesize declaration of helper functions needed in this routine.
2758 if (!SelGetUidFunctionDecl)
2759 SynthSelGetUidFunctionDecl();
2760 // use objc_msgSend() for all.
2761 if (!MsgSendFunctionDecl)
2762 SynthMsgSendFunctionDecl();
2763 if (!GetClassFunctionDecl)
2764 SynthGetClassFunctionDecl();
2765
2766 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2767 SourceLocation StartLoc = Exp->getLocStart();
2768 SourceLocation EndLoc = Exp->getLocEnd();
2769
2770 // Build the expression: __NSContainer_literal(int, ...).arr
2771 QualType IntQT = Context->IntTy;
2772 QualType NSArrayFType =
2773 getSimpleFunctionType(Context->VoidTy, IntQT, true);
2774 std::string NSArrayFName("__NSContainer_literal");
2775 FunctionDecl *NSArrayFD = SynthBlockInitFunctionDecl(NSArrayFName);
2776 DeclRefExpr *NSArrayDRE =
2777 new (Context) DeclRefExpr(NSArrayFD, false, NSArrayFType, VK_RValue,
2778 SourceLocation());
2779
2780 SmallVector<Expr*, 16> InitExprs;
2781 unsigned NumElements = Exp->getNumElements();
2782 unsigned UnsignedIntSize =
2783 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
2784 Expr *count = IntegerLiteral::Create(*Context,
2785 llvm::APInt(UnsignedIntSize, NumElements),
2786 Context->UnsignedIntTy, SourceLocation());
2787 InitExprs.push_back(count);
2788 for (unsigned i = 0; i < NumElements; i++)
2789 InitExprs.push_back(Exp->getElement(i));
2790 Expr *NSArrayCallExpr =
2791 new (Context) CallExpr(*Context, NSArrayDRE, InitExprs,
2792 NSArrayFType, VK_LValue, SourceLocation());
2793
2794 FieldDecl *ARRFD = FieldDecl::Create(*Context, 0, SourceLocation(),
2795 SourceLocation(),
2796 &Context->Idents.get("arr"),
2797 Context->getPointerType(Context->VoidPtrTy), 0,
2798 /*BitWidth=*/0, /*Mutable=*/true,
2799 ICIS_NoInit);
2800 MemberExpr *ArrayLiteralME =
2801 new (Context) MemberExpr(NSArrayCallExpr, false, ARRFD,
2802 SourceLocation(),
2803 ARRFD->getType(), VK_LValue,
2804 OK_Ordinary);
2805 QualType ConstIdT = Context->getObjCIdType().withConst();
2806 CStyleCastExpr * ArrayLiteralObjects =
2807 NoTypeInfoCStyleCastExpr(Context,
2808 Context->getPointerType(ConstIdT),
2809 CK_BitCast,
2810 ArrayLiteralME);
2811
2812 // Synthesize a call to objc_msgSend().
2813 SmallVector<Expr*, 32> MsgExprs;
2814 SmallVector<Expr*, 4> ClsExprs;
2815 QualType argType = Context->getPointerType(Context->CharTy);
2816 QualType expType = Exp->getType();
2817
2818 // Create a call to objc_getClass("NSArray"). It will be th 1st argument.
2819 ObjCInterfaceDecl *Class =
2820 expType->getPointeeType()->getAs<ObjCObjectType>()->getInterface();
2821
2822 IdentifierInfo *clsName = Class->getIdentifier();
2823 ClsExprs.push_back(StringLiteral::Create(*Context,
2824 clsName->getName(),
2825 StringLiteral::Ascii, false,
2826 argType, SourceLocation()));
2827 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl,
2828 &ClsExprs[0],
2829 ClsExprs.size(),
2830 StartLoc, EndLoc);
2831 MsgExprs.push_back(Cls);
2832
2833 // Create a call to sel_registerName("arrayWithObjects:count:").
2834 // it will be the 2nd argument.
2835 SmallVector<Expr*, 4> SelExprs;
2836 ObjCMethodDecl *ArrayMethod = Exp->getArrayWithObjectsMethod();
2837 SelExprs.push_back(StringLiteral::Create(*Context,
2838 ArrayMethod->getSelector().getAsString(),
2839 StringLiteral::Ascii, false,
2840 argType, SourceLocation()));
2841 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2842 &SelExprs[0], SelExprs.size(),
2843 StartLoc, EndLoc);
2844 MsgExprs.push_back(SelExp);
2845
2846 // (const id [])objects
2847 MsgExprs.push_back(ArrayLiteralObjects);
2848
2849 // (NSUInteger)cnt
2850 Expr *cnt = IntegerLiteral::Create(*Context,
2851 llvm::APInt(UnsignedIntSize, NumElements),
2852 Context->UnsignedIntTy, SourceLocation());
2853 MsgExprs.push_back(cnt);
2854
2855
2856 SmallVector<QualType, 4> ArgTypes;
2857 ArgTypes.push_back(Context->getObjCIdType());
2858 ArgTypes.push_back(Context->getObjCSelType());
2859 for (ObjCMethodDecl::param_iterator PI = ArrayMethod->param_begin(),
2860 E = ArrayMethod->param_end(); PI != E; ++PI)
2861 ArgTypes.push_back((*PI)->getType());
2862
2863 QualType returnType = Exp->getType();
2864 // Get the type, we will need to reference it in a couple spots.
2865 QualType msgSendType = MsgSendFlavor->getType();
2866
2867 // Create a reference to the objc_msgSend() declaration.
2868 DeclRefExpr *DRE = new (Context) DeclRefExpr(MsgSendFlavor, false, msgSendType,
2869 VK_LValue, SourceLocation());
2870
2871 CastExpr *cast = NoTypeInfoCStyleCastExpr(Context,
2872 Context->getPointerType(Context->VoidTy),
2873 CK_BitCast, DRE);
2874
2875 // Now do the "normal" pointer to function cast.
2876 QualType castType =
2877 getSimpleFunctionType(returnType, ArgTypes, ArrayMethod->isVariadic());
2878 castType = Context->getPointerType(castType);
2879 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2880 cast);
2881
2882 // Don't forget the parens to enforce the proper binding.
2883 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2884
2885 const FunctionType *FT = msgSendType->getAs<FunctionType>();
2886 CallExpr *CE = new (Context) CallExpr(*Context, PE, MsgExprs,
2887 FT->getResultType(), VK_RValue,
2888 EndLoc);
2889 ReplaceStmt(Exp, CE);
2890 return CE;
2891 }
2892
RewriteObjCDictionaryLiteralExpr(ObjCDictionaryLiteral * Exp)2893 Stmt *RewriteModernObjC::RewriteObjCDictionaryLiteralExpr(ObjCDictionaryLiteral *Exp) {
2894 // synthesize declaration of helper functions needed in this routine.
2895 if (!SelGetUidFunctionDecl)
2896 SynthSelGetUidFunctionDecl();
2897 // use objc_msgSend() for all.
2898 if (!MsgSendFunctionDecl)
2899 SynthMsgSendFunctionDecl();
2900 if (!GetClassFunctionDecl)
2901 SynthGetClassFunctionDecl();
2902
2903 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2904 SourceLocation StartLoc = Exp->getLocStart();
2905 SourceLocation EndLoc = Exp->getLocEnd();
2906
2907 // Build the expression: __NSContainer_literal(int, ...).arr
2908 QualType IntQT = Context->IntTy;
2909 QualType NSDictFType =
2910 getSimpleFunctionType(Context->VoidTy, IntQT, true);
2911 std::string NSDictFName("__NSContainer_literal");
2912 FunctionDecl *NSDictFD = SynthBlockInitFunctionDecl(NSDictFName);
2913 DeclRefExpr *NSDictDRE =
2914 new (Context) DeclRefExpr(NSDictFD, false, NSDictFType, VK_RValue,
2915 SourceLocation());
2916
2917 SmallVector<Expr*, 16> KeyExprs;
2918 SmallVector<Expr*, 16> ValueExprs;
2919
2920 unsigned NumElements = Exp->getNumElements();
2921 unsigned UnsignedIntSize =
2922 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
2923 Expr *count = IntegerLiteral::Create(*Context,
2924 llvm::APInt(UnsignedIntSize, NumElements),
2925 Context->UnsignedIntTy, SourceLocation());
2926 KeyExprs.push_back(count);
2927 ValueExprs.push_back(count);
2928 for (unsigned i = 0; i < NumElements; i++) {
2929 ObjCDictionaryElement Element = Exp->getKeyValueElement(i);
2930 KeyExprs.push_back(Element.Key);
2931 ValueExprs.push_back(Element.Value);
2932 }
2933
2934 // (const id [])objects
2935 Expr *NSValueCallExpr =
2936 new (Context) CallExpr(*Context, NSDictDRE, ValueExprs,
2937 NSDictFType, VK_LValue, SourceLocation());
2938
2939 FieldDecl *ARRFD = FieldDecl::Create(*Context, 0, SourceLocation(),
2940 SourceLocation(),
2941 &Context->Idents.get("arr"),
2942 Context->getPointerType(Context->VoidPtrTy), 0,
2943 /*BitWidth=*/0, /*Mutable=*/true,
2944 ICIS_NoInit);
2945 MemberExpr *DictLiteralValueME =
2946 new (Context) MemberExpr(NSValueCallExpr, false, ARRFD,
2947 SourceLocation(),
2948 ARRFD->getType(), VK_LValue,
2949 OK_Ordinary);
2950 QualType ConstIdT = Context->getObjCIdType().withConst();
2951 CStyleCastExpr * DictValueObjects =
2952 NoTypeInfoCStyleCastExpr(Context,
2953 Context->getPointerType(ConstIdT),
2954 CK_BitCast,
2955 DictLiteralValueME);
2956 // (const id <NSCopying> [])keys
2957 Expr *NSKeyCallExpr =
2958 new (Context) CallExpr(*Context, NSDictDRE, KeyExprs,
2959 NSDictFType, VK_LValue, SourceLocation());
2960
2961 MemberExpr *DictLiteralKeyME =
2962 new (Context) MemberExpr(NSKeyCallExpr, false, ARRFD,
2963 SourceLocation(),
2964 ARRFD->getType(), VK_LValue,
2965 OK_Ordinary);
2966
2967 CStyleCastExpr * DictKeyObjects =
2968 NoTypeInfoCStyleCastExpr(Context,
2969 Context->getPointerType(ConstIdT),
2970 CK_BitCast,
2971 DictLiteralKeyME);
2972
2973
2974
2975 // Synthesize a call to objc_msgSend().
2976 SmallVector<Expr*, 32> MsgExprs;
2977 SmallVector<Expr*, 4> ClsExprs;
2978 QualType argType = Context->getPointerType(Context->CharTy);
2979 QualType expType = Exp->getType();
2980
2981 // Create a call to objc_getClass("NSArray"). It will be th 1st argument.
2982 ObjCInterfaceDecl *Class =
2983 expType->getPointeeType()->getAs<ObjCObjectType>()->getInterface();
2984
2985 IdentifierInfo *clsName = Class->getIdentifier();
2986 ClsExprs.push_back(StringLiteral::Create(*Context,
2987 clsName->getName(),
2988 StringLiteral::Ascii, false,
2989 argType, SourceLocation()));
2990 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl,
2991 &ClsExprs[0],
2992 ClsExprs.size(),
2993 StartLoc, EndLoc);
2994 MsgExprs.push_back(Cls);
2995
2996 // Create a call to sel_registerName("arrayWithObjects:count:").
2997 // it will be the 2nd argument.
2998 SmallVector<Expr*, 4> SelExprs;
2999 ObjCMethodDecl *DictMethod = Exp->getDictWithObjectsMethod();
3000 SelExprs.push_back(StringLiteral::Create(*Context,
3001 DictMethod->getSelector().getAsString(),
3002 StringLiteral::Ascii, false,
3003 argType, SourceLocation()));
3004 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
3005 &SelExprs[0], SelExprs.size(),
3006 StartLoc, EndLoc);
3007 MsgExprs.push_back(SelExp);
3008
3009 // (const id [])objects
3010 MsgExprs.push_back(DictValueObjects);
3011
3012 // (const id <NSCopying> [])keys
3013 MsgExprs.push_back(DictKeyObjects);
3014
3015 // (NSUInteger)cnt
3016 Expr *cnt = IntegerLiteral::Create(*Context,
3017 llvm::APInt(UnsignedIntSize, NumElements),
3018 Context->UnsignedIntTy, SourceLocation());
3019 MsgExprs.push_back(cnt);
3020
3021
3022 SmallVector<QualType, 8> ArgTypes;
3023 ArgTypes.push_back(Context->getObjCIdType());
3024 ArgTypes.push_back(Context->getObjCSelType());
3025 for (ObjCMethodDecl::param_iterator PI = DictMethod->param_begin(),
3026 E = DictMethod->param_end(); PI != E; ++PI) {
3027 QualType T = (*PI)->getType();
3028 if (const PointerType* PT = T->getAs<PointerType>()) {
3029 QualType PointeeTy = PT->getPointeeType();
3030 convertToUnqualifiedObjCType(PointeeTy);
3031 T = Context->getPointerType(PointeeTy);
3032 }
3033 ArgTypes.push_back(T);
3034 }
3035
3036 QualType returnType = Exp->getType();
3037 // Get the type, we will need to reference it in a couple spots.
3038 QualType msgSendType = MsgSendFlavor->getType();
3039
3040 // Create a reference to the objc_msgSend() declaration.
3041 DeclRefExpr *DRE = new (Context) DeclRefExpr(MsgSendFlavor, false, msgSendType,
3042 VK_LValue, SourceLocation());
3043
3044 CastExpr *cast = NoTypeInfoCStyleCastExpr(Context,
3045 Context->getPointerType(Context->VoidTy),
3046 CK_BitCast, DRE);
3047
3048 // Now do the "normal" pointer to function cast.
3049 QualType castType =
3050 getSimpleFunctionType(returnType, ArgTypes, DictMethod->isVariadic());
3051 castType = Context->getPointerType(castType);
3052 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
3053 cast);
3054
3055 // Don't forget the parens to enforce the proper binding.
3056 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
3057
3058 const FunctionType *FT = msgSendType->getAs<FunctionType>();
3059 CallExpr *CE = new (Context) CallExpr(*Context, PE, MsgExprs,
3060 FT->getResultType(), VK_RValue,
3061 EndLoc);
3062 ReplaceStmt(Exp, CE);
3063 return CE;
3064 }
3065
3066 // struct __rw_objc_super {
3067 // struct objc_object *object; struct objc_object *superClass;
3068 // };
getSuperStructType()3069 QualType RewriteModernObjC::getSuperStructType() {
3070 if (!SuperStructDecl) {
3071 SuperStructDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
3072 SourceLocation(), SourceLocation(),
3073 &Context->Idents.get("__rw_objc_super"));
3074 QualType FieldTypes[2];
3075
3076 // struct objc_object *object;
3077 FieldTypes[0] = Context->getObjCIdType();
3078 // struct objc_object *superClass;
3079 FieldTypes[1] = Context->getObjCIdType();
3080
3081 // Create fields
3082 for (unsigned i = 0; i < 2; ++i) {
3083 SuperStructDecl->addDecl(FieldDecl::Create(*Context, SuperStructDecl,
3084 SourceLocation(),
3085 SourceLocation(), 0,
3086 FieldTypes[i], 0,
3087 /*BitWidth=*/0,
3088 /*Mutable=*/false,
3089 ICIS_NoInit));
3090 }
3091
3092 SuperStructDecl->completeDefinition();
3093 }
3094 return Context->getTagDeclType(SuperStructDecl);
3095 }
3096
getConstantStringStructType()3097 QualType RewriteModernObjC::getConstantStringStructType() {
3098 if (!ConstantStringDecl) {
3099 ConstantStringDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
3100 SourceLocation(), SourceLocation(),
3101 &Context->Idents.get("__NSConstantStringImpl"));
3102 QualType FieldTypes[4];
3103
3104 // struct objc_object *receiver;
3105 FieldTypes[0] = Context->getObjCIdType();
3106 // int flags;
3107 FieldTypes[1] = Context->IntTy;
3108 // char *str;
3109 FieldTypes[2] = Context->getPointerType(Context->CharTy);
3110 // long length;
3111 FieldTypes[3] = Context->LongTy;
3112
3113 // Create fields
3114 for (unsigned i = 0; i < 4; ++i) {
3115 ConstantStringDecl->addDecl(FieldDecl::Create(*Context,
3116 ConstantStringDecl,
3117 SourceLocation(),
3118 SourceLocation(), 0,
3119 FieldTypes[i], 0,
3120 /*BitWidth=*/0,
3121 /*Mutable=*/true,
3122 ICIS_NoInit));
3123 }
3124
3125 ConstantStringDecl->completeDefinition();
3126 }
3127 return Context->getTagDeclType(ConstantStringDecl);
3128 }
3129
3130 /// getFunctionSourceLocation - returns start location of a function
3131 /// definition. Complication arises when function has declared as
3132 /// extern "C" or extern "C" {...}
getFunctionSourceLocation(RewriteModernObjC & R,FunctionDecl * FD)3133 static SourceLocation getFunctionSourceLocation (RewriteModernObjC &R,
3134 FunctionDecl *FD) {
3135 if (FD->isExternC() && !FD->isMain()) {
3136 const DeclContext *DC = FD->getDeclContext();
3137 if (const LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(DC))
3138 // if it is extern "C" {...}, return function decl's own location.
3139 if (!LSD->getRBraceLoc().isValid())
3140 return LSD->getExternLoc();
3141 }
3142 if (FD->getStorageClass() != SC_None)
3143 R.RewriteBlockLiteralFunctionDecl(FD);
3144 return FD->getTypeSpecStartLoc();
3145 }
3146
RewriteLineDirective(const Decl * D)3147 void RewriteModernObjC::RewriteLineDirective(const Decl *D) {
3148
3149 SourceLocation Location = D->getLocation();
3150
3151 if (Location.isFileID() && GenerateLineInfo) {
3152 std::string LineString("\n#line ");
3153 PresumedLoc PLoc = SM->getPresumedLoc(Location);
3154 LineString += utostr(PLoc.getLine());
3155 LineString += " \"";
3156 LineString += Lexer::Stringify(PLoc.getFilename());
3157 if (isa<ObjCMethodDecl>(D))
3158 LineString += "\"";
3159 else LineString += "\"\n";
3160
3161 Location = D->getLocStart();
3162 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
3163 if (FD->isExternC() && !FD->isMain()) {
3164 const DeclContext *DC = FD->getDeclContext();
3165 if (const LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(DC))
3166 // if it is extern "C" {...}, return function decl's own location.
3167 if (!LSD->getRBraceLoc().isValid())
3168 Location = LSD->getExternLoc();
3169 }
3170 }
3171 InsertText(Location, LineString);
3172 }
3173 }
3174
3175 /// SynthMsgSendStretCallExpr - This routine translates message expression
3176 /// into a call to objc_msgSend_stret() entry point. Tricky part is that
3177 /// nil check on receiver must be performed before calling objc_msgSend_stret.
3178 /// MsgSendStretFlavor - function declaration objc_msgSend_stret(...)
3179 /// msgSendType - function type of objc_msgSend_stret(...)
3180 /// returnType - Result type of the method being synthesized.
3181 /// ArgTypes - type of the arguments passed to objc_msgSend_stret, starting with receiver type.
3182 /// MsgExprs - list of argument expressions being passed to objc_msgSend_stret,
3183 /// starting with receiver.
3184 /// Method - Method being rewritten.
SynthMsgSendStretCallExpr(FunctionDecl * MsgSendStretFlavor,QualType msgSendType,QualType returnType,SmallVectorImpl<QualType> & ArgTypes,SmallVectorImpl<Expr * > & MsgExprs,ObjCMethodDecl * Method)3185 Expr *RewriteModernObjC::SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
3186 QualType msgSendType,
3187 QualType returnType,
3188 SmallVectorImpl<QualType> &ArgTypes,
3189 SmallVectorImpl<Expr*> &MsgExprs,
3190 ObjCMethodDecl *Method) {
3191 // Now do the "normal" pointer to function cast.
3192 QualType castType = getSimpleFunctionType(returnType, ArgTypes,
3193 Method ? Method->isVariadic()
3194 : false);
3195 castType = Context->getPointerType(castType);
3196
3197 // build type for containing the objc_msgSend_stret object.
3198 static unsigned stretCount=0;
3199 std::string name = "__Stret"; name += utostr(stretCount);
3200 std::string str =
3201 "extern \"C\" void * __cdecl memset(void *_Dst, int _Val, size_t _Size);\n";
3202 str += "struct "; str += name;
3203 str += " {\n\t";
3204 str += name;
3205 str += "(id receiver, SEL sel";
3206 for (unsigned i = 2; i < ArgTypes.size(); i++) {
3207 std::string ArgName = "arg"; ArgName += utostr(i);
3208 ArgTypes[i].getAsStringInternal(ArgName, Context->getPrintingPolicy());
3209 str += ", "; str += ArgName;
3210 }
3211 // could be vararg.
3212 for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); i++) {
3213 std::string ArgName = "arg"; ArgName += utostr(i);
3214 MsgExprs[i]->getType().getAsStringInternal(ArgName,
3215 Context->getPrintingPolicy());
3216 str += ", "; str += ArgName;
3217 }
3218
3219 str += ") {\n";
3220 str += "\t if (receiver == 0)\n";
3221 str += "\t memset((void*)&s, 0, sizeof(s));\n";
3222 str += "\t else\n";
3223 str += "\t s = (("; str += castType.getAsString(Context->getPrintingPolicy());
3224 str += ")(void *)objc_msgSend_stret)(receiver, sel";
3225 for (unsigned i = 2; i < ArgTypes.size(); i++) {
3226 str += ", arg"; str += utostr(i);
3227 }
3228 // could be vararg.
3229 for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); i++) {
3230 str += ", arg"; str += utostr(i);
3231 }
3232
3233 str += ");\n";
3234 str += "\t}\n";
3235 str += "\t"; str += returnType.getAsString(Context->getPrintingPolicy());
3236 str += " s;\n";
3237 str += "};\n\n";
3238 SourceLocation FunLocStart;
3239 if (CurFunctionDef)
3240 FunLocStart = getFunctionSourceLocation(*this, CurFunctionDef);
3241 else {
3242 assert(CurMethodDef && "SynthMsgSendStretCallExpr - CurMethodDef is null");
3243 FunLocStart = CurMethodDef->getLocStart();
3244 }
3245
3246 InsertText(FunLocStart, str);
3247 ++stretCount;
3248
3249 // AST for __Stretn(receiver, args).s;
3250 IdentifierInfo *ID = &Context->Idents.get(name);
3251 FunctionDecl *FD = FunctionDecl::Create(*Context, TUDecl, SourceLocation(),
3252 SourceLocation(), ID, castType, 0,
3253 SC_Extern, false, false);
3254 DeclRefExpr *DRE = new (Context) DeclRefExpr(FD, false, castType, VK_RValue,
3255 SourceLocation());
3256 CallExpr *STCE = new (Context) CallExpr(*Context, DRE, MsgExprs,
3257 castType, VK_LValue, SourceLocation());
3258
3259 FieldDecl *FieldD = FieldDecl::Create(*Context, 0, SourceLocation(),
3260 SourceLocation(),
3261 &Context->Idents.get("s"),
3262 returnType, 0,
3263 /*BitWidth=*/0, /*Mutable=*/true,
3264 ICIS_NoInit);
3265 MemberExpr *ME = new (Context) MemberExpr(STCE, false, FieldD, SourceLocation(),
3266 FieldD->getType(), VK_LValue,
3267 OK_Ordinary);
3268
3269 return ME;
3270 }
3271
SynthMessageExpr(ObjCMessageExpr * Exp,SourceLocation StartLoc,SourceLocation EndLoc)3272 Stmt *RewriteModernObjC::SynthMessageExpr(ObjCMessageExpr *Exp,
3273 SourceLocation StartLoc,
3274 SourceLocation EndLoc) {
3275 if (!SelGetUidFunctionDecl)
3276 SynthSelGetUidFunctionDecl();
3277 if (!MsgSendFunctionDecl)
3278 SynthMsgSendFunctionDecl();
3279 if (!MsgSendSuperFunctionDecl)
3280 SynthMsgSendSuperFunctionDecl();
3281 if (!MsgSendStretFunctionDecl)
3282 SynthMsgSendStretFunctionDecl();
3283 if (!MsgSendSuperStretFunctionDecl)
3284 SynthMsgSendSuperStretFunctionDecl();
3285 if (!MsgSendFpretFunctionDecl)
3286 SynthMsgSendFpretFunctionDecl();
3287 if (!GetClassFunctionDecl)
3288 SynthGetClassFunctionDecl();
3289 if (!GetSuperClassFunctionDecl)
3290 SynthGetSuperClassFunctionDecl();
3291 if (!GetMetaClassFunctionDecl)
3292 SynthGetMetaClassFunctionDecl();
3293
3294 // default to objc_msgSend().
3295 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
3296 // May need to use objc_msgSend_stret() as well.
3297 FunctionDecl *MsgSendStretFlavor = 0;
3298 if (ObjCMethodDecl *mDecl = Exp->getMethodDecl()) {
3299 QualType resultType = mDecl->getResultType();
3300 if (resultType->isRecordType())
3301 MsgSendStretFlavor = MsgSendStretFunctionDecl;
3302 else if (resultType->isRealFloatingType())
3303 MsgSendFlavor = MsgSendFpretFunctionDecl;
3304 }
3305
3306 // Synthesize a call to objc_msgSend().
3307 SmallVector<Expr*, 8> MsgExprs;
3308 switch (Exp->getReceiverKind()) {
3309 case ObjCMessageExpr::SuperClass: {
3310 MsgSendFlavor = MsgSendSuperFunctionDecl;
3311 if (MsgSendStretFlavor)
3312 MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
3313 assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
3314
3315 ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
3316
3317 SmallVector<Expr*, 4> InitExprs;
3318
3319 // set the receiver to self, the first argument to all methods.
3320 InitExprs.push_back(
3321 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3322 CK_BitCast,
3323 new (Context) DeclRefExpr(CurMethodDef->getSelfDecl(),
3324 false,
3325 Context->getObjCIdType(),
3326 VK_RValue,
3327 SourceLocation()))
3328 ); // set the 'receiver'.
3329
3330 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3331 SmallVector<Expr*, 8> ClsExprs;
3332 QualType argType = Context->getPointerType(Context->CharTy);
3333 ClsExprs.push_back(StringLiteral::Create(*Context,
3334 ClassDecl->getIdentifier()->getName(),
3335 StringLiteral::Ascii, false,
3336 argType, SourceLocation()));
3337 // (Class)objc_getClass("CurrentClass")
3338 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetMetaClassFunctionDecl,
3339 &ClsExprs[0],
3340 ClsExprs.size(),
3341 StartLoc,
3342 EndLoc);
3343 ClsExprs.clear();
3344 ClsExprs.push_back(Cls);
3345 Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl,
3346 &ClsExprs[0], ClsExprs.size(),
3347 StartLoc, EndLoc);
3348
3349 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3350 // To turn off a warning, type-cast to 'id'
3351 InitExprs.push_back( // set 'super class', using class_getSuperclass().
3352 NoTypeInfoCStyleCastExpr(Context,
3353 Context->getObjCIdType(),
3354 CK_BitCast, Cls));
3355 // struct __rw_objc_super
3356 QualType superType = getSuperStructType();
3357 Expr *SuperRep;
3358
3359 if (LangOpts.MicrosoftExt) {
3360 SynthSuperContructorFunctionDecl();
3361 // Simulate a contructor call...
3362 DeclRefExpr *DRE = new (Context) DeclRefExpr(SuperContructorFunctionDecl,
3363 false, superType, VK_LValue,
3364 SourceLocation());
3365 SuperRep = new (Context) CallExpr(*Context, DRE, InitExprs,
3366 superType, VK_LValue,
3367 SourceLocation());
3368 // The code for super is a little tricky to prevent collision with
3369 // the structure definition in the header. The rewriter has it's own
3370 // internal definition (__rw_objc_super) that is uses. This is why
3371 // we need the cast below. For example:
3372 // (struct __rw_objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
3373 //
3374 SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
3375 Context->getPointerType(SuperRep->getType()),
3376 VK_RValue, OK_Ordinary,
3377 SourceLocation());
3378 SuperRep = NoTypeInfoCStyleCastExpr(Context,
3379 Context->getPointerType(superType),
3380 CK_BitCast, SuperRep);
3381 } else {
3382 // (struct __rw_objc_super) { <exprs from above> }
3383 InitListExpr *ILE =
3384 new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
3385 SourceLocation());
3386 TypeSourceInfo *superTInfo
3387 = Context->getTrivialTypeSourceInfo(superType);
3388 SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
3389 superType, VK_LValue,
3390 ILE, false);
3391 // struct __rw_objc_super *
3392 SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
3393 Context->getPointerType(SuperRep->getType()),
3394 VK_RValue, OK_Ordinary,
3395 SourceLocation());
3396 }
3397 MsgExprs.push_back(SuperRep);
3398 break;
3399 }
3400
3401 case ObjCMessageExpr::Class: {
3402 SmallVector<Expr*, 8> ClsExprs;
3403 QualType argType = Context->getPointerType(Context->CharTy);
3404 ObjCInterfaceDecl *Class
3405 = Exp->getClassReceiver()->getAs<ObjCObjectType>()->getInterface();
3406 IdentifierInfo *clsName = Class->getIdentifier();
3407 ClsExprs.push_back(StringLiteral::Create(*Context,
3408 clsName->getName(),
3409 StringLiteral::Ascii, false,
3410 argType, SourceLocation()));
3411 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl,
3412 &ClsExprs[0],
3413 ClsExprs.size(),
3414 StartLoc, EndLoc);
3415 CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
3416 Context->getObjCIdType(),
3417 CK_BitCast, Cls);
3418 MsgExprs.push_back(ArgExpr);
3419 break;
3420 }
3421
3422 case ObjCMessageExpr::SuperInstance:{
3423 MsgSendFlavor = MsgSendSuperFunctionDecl;
3424 if (MsgSendStretFlavor)
3425 MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
3426 assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
3427 ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
3428 SmallVector<Expr*, 4> InitExprs;
3429
3430 InitExprs.push_back(
3431 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3432 CK_BitCast,
3433 new (Context) DeclRefExpr(CurMethodDef->getSelfDecl(),
3434 false,
3435 Context->getObjCIdType(),
3436 VK_RValue, SourceLocation()))
3437 ); // set the 'receiver'.
3438
3439 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3440 SmallVector<Expr*, 8> ClsExprs;
3441 QualType argType = Context->getPointerType(Context->CharTy);
3442 ClsExprs.push_back(StringLiteral::Create(*Context,
3443 ClassDecl->getIdentifier()->getName(),
3444 StringLiteral::Ascii, false, argType,
3445 SourceLocation()));
3446 // (Class)objc_getClass("CurrentClass")
3447 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl,
3448 &ClsExprs[0],
3449 ClsExprs.size(),
3450 StartLoc, EndLoc);
3451 ClsExprs.clear();
3452 ClsExprs.push_back(Cls);
3453 Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl,
3454 &ClsExprs[0], ClsExprs.size(),
3455 StartLoc, EndLoc);
3456
3457 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3458 // To turn off a warning, type-cast to 'id'
3459 InitExprs.push_back(
3460 // set 'super class', using class_getSuperclass().
3461 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3462 CK_BitCast, Cls));
3463 // struct __rw_objc_super
3464 QualType superType = getSuperStructType();
3465 Expr *SuperRep;
3466
3467 if (LangOpts.MicrosoftExt) {
3468 SynthSuperContructorFunctionDecl();
3469 // Simulate a contructor call...
3470 DeclRefExpr *DRE = new (Context) DeclRefExpr(SuperContructorFunctionDecl,
3471 false, superType, VK_LValue,
3472 SourceLocation());
3473 SuperRep = new (Context) CallExpr(*Context, DRE, InitExprs,
3474 superType, VK_LValue, SourceLocation());
3475 // The code for super is a little tricky to prevent collision with
3476 // the structure definition in the header. The rewriter has it's own
3477 // internal definition (__rw_objc_super) that is uses. This is why
3478 // we need the cast below. For example:
3479 // (struct __rw_objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
3480 //
3481 SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
3482 Context->getPointerType(SuperRep->getType()),
3483 VK_RValue, OK_Ordinary,
3484 SourceLocation());
3485 SuperRep = NoTypeInfoCStyleCastExpr(Context,
3486 Context->getPointerType(superType),
3487 CK_BitCast, SuperRep);
3488 } else {
3489 // (struct __rw_objc_super) { <exprs from above> }
3490 InitListExpr *ILE =
3491 new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
3492 SourceLocation());
3493 TypeSourceInfo *superTInfo
3494 = Context->getTrivialTypeSourceInfo(superType);
3495 SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
3496 superType, VK_RValue, ILE,
3497 false);
3498 }
3499 MsgExprs.push_back(SuperRep);
3500 break;
3501 }
3502
3503 case ObjCMessageExpr::Instance: {
3504 // Remove all type-casts because it may contain objc-style types; e.g.
3505 // Foo<Proto> *.
3506 Expr *recExpr = Exp->getInstanceReceiver();
3507 while (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(recExpr))
3508 recExpr = CE->getSubExpr();
3509 CastKind CK = recExpr->getType()->isObjCObjectPointerType()
3510 ? CK_BitCast : recExpr->getType()->isBlockPointerType()
3511 ? CK_BlockPointerToObjCPointerCast
3512 : CK_CPointerToObjCPointerCast;
3513
3514 recExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3515 CK, recExpr);
3516 MsgExprs.push_back(recExpr);
3517 break;
3518 }
3519 }
3520
3521 // Create a call to sel_registerName("selName"), it will be the 2nd argument.
3522 SmallVector<Expr*, 8> SelExprs;
3523 QualType argType = Context->getPointerType(Context->CharTy);
3524 SelExprs.push_back(StringLiteral::Create(*Context,
3525 Exp->getSelector().getAsString(),
3526 StringLiteral::Ascii, false,
3527 argType, SourceLocation()));
3528 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
3529 &SelExprs[0], SelExprs.size(),
3530 StartLoc,
3531 EndLoc);
3532 MsgExprs.push_back(SelExp);
3533
3534 // Now push any user supplied arguments.
3535 for (unsigned i = 0; i < Exp->getNumArgs(); i++) {
3536 Expr *userExpr = Exp->getArg(i);
3537 // Make all implicit casts explicit...ICE comes in handy:-)
3538 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(userExpr)) {
3539 // Reuse the ICE type, it is exactly what the doctor ordered.
3540 QualType type = ICE->getType();
3541 if (needToScanForQualifiers(type))
3542 type = Context->getObjCIdType();
3543 // Make sure we convert "type (^)(...)" to "type (*)(...)".
3544 (void)convertBlockPointerToFunctionPointer(type);
3545 const Expr *SubExpr = ICE->IgnoreParenImpCasts();
3546 CastKind CK;
3547 if (SubExpr->getType()->isIntegralType(*Context) &&
3548 type->isBooleanType()) {
3549 CK = CK_IntegralToBoolean;
3550 } else if (type->isObjCObjectPointerType()) {
3551 if (SubExpr->getType()->isBlockPointerType()) {
3552 CK = CK_BlockPointerToObjCPointerCast;
3553 } else if (SubExpr->getType()->isPointerType()) {
3554 CK = CK_CPointerToObjCPointerCast;
3555 } else {
3556 CK = CK_BitCast;
3557 }
3558 } else {
3559 CK = CK_BitCast;
3560 }
3561
3562 userExpr = NoTypeInfoCStyleCastExpr(Context, type, CK, userExpr);
3563 }
3564 // Make id<P...> cast into an 'id' cast.
3565 else if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(userExpr)) {
3566 if (CE->getType()->isObjCQualifiedIdType()) {
3567 while ((CE = dyn_cast<CStyleCastExpr>(userExpr)))
3568 userExpr = CE->getSubExpr();
3569 CastKind CK;
3570 if (userExpr->getType()->isIntegralType(*Context)) {
3571 CK = CK_IntegralToPointer;
3572 } else if (userExpr->getType()->isBlockPointerType()) {
3573 CK = CK_BlockPointerToObjCPointerCast;
3574 } else if (userExpr->getType()->isPointerType()) {
3575 CK = CK_CPointerToObjCPointerCast;
3576 } else {
3577 CK = CK_BitCast;
3578 }
3579 userExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3580 CK, userExpr);
3581 }
3582 }
3583 MsgExprs.push_back(userExpr);
3584 // We've transferred the ownership to MsgExprs. For now, we *don't* null
3585 // out the argument in the original expression (since we aren't deleting
3586 // the ObjCMessageExpr). See RewritePropertyOrImplicitSetter() usage for more info.
3587 //Exp->setArg(i, 0);
3588 }
3589 // Generate the funky cast.
3590 CastExpr *cast;
3591 SmallVector<QualType, 8> ArgTypes;
3592 QualType returnType;
3593
3594 // Push 'id' and 'SEL', the 2 implicit arguments.
3595 if (MsgSendFlavor == MsgSendSuperFunctionDecl)
3596 ArgTypes.push_back(Context->getPointerType(getSuperStructType()));
3597 else
3598 ArgTypes.push_back(Context->getObjCIdType());
3599 ArgTypes.push_back(Context->getObjCSelType());
3600 if (ObjCMethodDecl *OMD = Exp->getMethodDecl()) {
3601 // Push any user argument types.
3602 for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
3603 E = OMD->param_end(); PI != E; ++PI) {
3604 QualType t = (*PI)->getType()->isObjCQualifiedIdType()
3605 ? Context->getObjCIdType()
3606 : (*PI)->getType();
3607 // Make sure we convert "t (^)(...)" to "t (*)(...)".
3608 (void)convertBlockPointerToFunctionPointer(t);
3609 ArgTypes.push_back(t);
3610 }
3611 returnType = Exp->getType();
3612 convertToUnqualifiedObjCType(returnType);
3613 (void)convertBlockPointerToFunctionPointer(returnType);
3614 } else {
3615 returnType = Context->getObjCIdType();
3616 }
3617 // Get the type, we will need to reference it in a couple spots.
3618 QualType msgSendType = MsgSendFlavor->getType();
3619
3620 // Create a reference to the objc_msgSend() declaration.
3621 DeclRefExpr *DRE = new (Context) DeclRefExpr(MsgSendFlavor, false, msgSendType,
3622 VK_LValue, SourceLocation());
3623
3624 // Need to cast objc_msgSend to "void *" (to workaround a GCC bandaid).
3625 // If we don't do this cast, we get the following bizarre warning/note:
3626 // xx.m:13: warning: function called through a non-compatible type
3627 // xx.m:13: note: if this code is reached, the program will abort
3628 cast = NoTypeInfoCStyleCastExpr(Context,
3629 Context->getPointerType(Context->VoidTy),
3630 CK_BitCast, DRE);
3631
3632 // Now do the "normal" pointer to function cast.
3633 // If we don't have a method decl, force a variadic cast.
3634 const ObjCMethodDecl *MD = Exp->getMethodDecl();
3635 QualType castType =
3636 getSimpleFunctionType(returnType, ArgTypes, MD ? MD->isVariadic() : true);
3637 castType = Context->getPointerType(castType);
3638 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
3639 cast);
3640
3641 // Don't forget the parens to enforce the proper binding.
3642 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
3643
3644 const FunctionType *FT = msgSendType->getAs<FunctionType>();
3645 CallExpr *CE = new (Context) CallExpr(*Context, PE, MsgExprs,
3646 FT->getResultType(), VK_RValue, EndLoc);
3647 Stmt *ReplacingStmt = CE;
3648 if (MsgSendStretFlavor) {
3649 // We have the method which returns a struct/union. Must also generate
3650 // call to objc_msgSend_stret and hang both varieties on a conditional
3651 // expression which dictate which one to envoke depending on size of
3652 // method's return type.
3653
3654 Expr *STCE = SynthMsgSendStretCallExpr(MsgSendStretFlavor,
3655 msgSendType, returnType,
3656 ArgTypes, MsgExprs,
3657 Exp->getMethodDecl());
3658
3659 // Build sizeof(returnType)
3660 UnaryExprOrTypeTraitExpr *sizeofExpr =
3661 new (Context) UnaryExprOrTypeTraitExpr(UETT_SizeOf,
3662 Context->getTrivialTypeSourceInfo(returnType),
3663 Context->getSizeType(), SourceLocation(),
3664 SourceLocation());
3665 // (sizeof(returnType) <= 8 ? objc_msgSend(...) : objc_msgSend_stret(...))
3666 // FIXME: Value of 8 is base on ppc32/x86 ABI for the most common cases.
3667 // For X86 it is more complicated and some kind of target specific routine
3668 // is needed to decide what to do.
3669 unsigned IntSize =
3670 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
3671 IntegerLiteral *limit = IntegerLiteral::Create(*Context,
3672 llvm::APInt(IntSize, 8),
3673 Context->IntTy,
3674 SourceLocation());
3675 BinaryOperator *lessThanExpr =
3676 new (Context) BinaryOperator(sizeofExpr, limit, BO_LE, Context->IntTy,
3677 VK_RValue, OK_Ordinary, SourceLocation(),
3678 false);
3679 // (sizeof(returnType) <= 8 ? objc_msgSend(...) : objc_msgSend_stret(...))
3680 ConditionalOperator *CondExpr =
3681 new (Context) ConditionalOperator(lessThanExpr,
3682 SourceLocation(), CE,
3683 SourceLocation(), STCE,
3684 returnType, VK_RValue, OK_Ordinary);
3685 ReplacingStmt = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
3686 CondExpr);
3687 }
3688 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3689 return ReplacingStmt;
3690 }
3691
RewriteMessageExpr(ObjCMessageExpr * Exp)3692 Stmt *RewriteModernObjC::RewriteMessageExpr(ObjCMessageExpr *Exp) {
3693 Stmt *ReplacingStmt = SynthMessageExpr(Exp, Exp->getLocStart(),
3694 Exp->getLocEnd());
3695
3696 // Now do the actual rewrite.
3697 ReplaceStmt(Exp, ReplacingStmt);
3698
3699 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3700 return ReplacingStmt;
3701 }
3702
3703 // typedef struct objc_object Protocol;
getProtocolType()3704 QualType RewriteModernObjC::getProtocolType() {
3705 if (!ProtocolTypeDecl) {
3706 TypeSourceInfo *TInfo
3707 = Context->getTrivialTypeSourceInfo(Context->getObjCIdType());
3708 ProtocolTypeDecl = TypedefDecl::Create(*Context, TUDecl,
3709 SourceLocation(), SourceLocation(),
3710 &Context->Idents.get("Protocol"),
3711 TInfo);
3712 }
3713 return Context->getTypeDeclType(ProtocolTypeDecl);
3714 }
3715
3716 /// RewriteObjCProtocolExpr - Rewrite a protocol expression into
3717 /// a synthesized/forward data reference (to the protocol's metadata).
3718 /// The forward references (and metadata) are generated in
3719 /// RewriteModernObjC::HandleTranslationUnit().
RewriteObjCProtocolExpr(ObjCProtocolExpr * Exp)3720 Stmt *RewriteModernObjC::RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp) {
3721 std::string Name = "_OBJC_PROTOCOL_REFERENCE_$_" +
3722 Exp->getProtocol()->getNameAsString();
3723 IdentifierInfo *ID = &Context->Idents.get(Name);
3724 VarDecl *VD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
3725 SourceLocation(), ID, getProtocolType(), 0,
3726 SC_Extern);
3727 DeclRefExpr *DRE = new (Context) DeclRefExpr(VD, false, getProtocolType(),
3728 VK_LValue, SourceLocation());
3729 Expr *DerefExpr = new (Context) UnaryOperator(DRE, UO_AddrOf,
3730 Context->getPointerType(DRE->getType()),
3731 VK_RValue, OK_Ordinary, SourceLocation());
3732 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, DerefExpr->getType(),
3733 CK_BitCast,
3734 DerefExpr);
3735 ReplaceStmt(Exp, castExpr);
3736 ProtocolExprDecls.insert(Exp->getProtocol()->getCanonicalDecl());
3737 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3738 return castExpr;
3739
3740 }
3741
BufferContainsPPDirectives(const char * startBuf,const char * endBuf)3742 bool RewriteModernObjC::BufferContainsPPDirectives(const char *startBuf,
3743 const char *endBuf) {
3744 while (startBuf < endBuf) {
3745 if (*startBuf == '#') {
3746 // Skip whitespace.
3747 for (++startBuf; startBuf[0] == ' ' || startBuf[0] == '\t'; ++startBuf)
3748 ;
3749 if (!strncmp(startBuf, "if", strlen("if")) ||
3750 !strncmp(startBuf, "ifdef", strlen("ifdef")) ||
3751 !strncmp(startBuf, "ifndef", strlen("ifndef")) ||
3752 !strncmp(startBuf, "define", strlen("define")) ||
3753 !strncmp(startBuf, "undef", strlen("undef")) ||
3754 !strncmp(startBuf, "else", strlen("else")) ||
3755 !strncmp(startBuf, "elif", strlen("elif")) ||
3756 !strncmp(startBuf, "endif", strlen("endif")) ||
3757 !strncmp(startBuf, "pragma", strlen("pragma")) ||
3758 !strncmp(startBuf, "include", strlen("include")) ||
3759 !strncmp(startBuf, "import", strlen("import")) ||
3760 !strncmp(startBuf, "include_next", strlen("include_next")))
3761 return true;
3762 }
3763 startBuf++;
3764 }
3765 return false;
3766 }
3767
3768 /// IsTagDefinedInsideClass - This routine checks that a named tagged type
3769 /// is defined inside an objective-c class. If so, it returns true.
IsTagDefinedInsideClass(ObjCContainerDecl * IDecl,TagDecl * Tag,bool & IsNamedDefinition)3770 bool RewriteModernObjC::IsTagDefinedInsideClass(ObjCContainerDecl *IDecl,
3771 TagDecl *Tag,
3772 bool &IsNamedDefinition) {
3773 if (!IDecl)
3774 return false;
3775 SourceLocation TagLocation;
3776 if (RecordDecl *RD = dyn_cast<RecordDecl>(Tag)) {
3777 RD = RD->getDefinition();
3778 if (!RD || !RD->getDeclName().getAsIdentifierInfo())
3779 return false;
3780 IsNamedDefinition = true;
3781 TagLocation = RD->getLocation();
3782 return Context->getSourceManager().isBeforeInTranslationUnit(
3783 IDecl->getLocation(), TagLocation);
3784 }
3785 if (EnumDecl *ED = dyn_cast<EnumDecl>(Tag)) {
3786 if (!ED || !ED->getDeclName().getAsIdentifierInfo())
3787 return false;
3788 IsNamedDefinition = true;
3789 TagLocation = ED->getLocation();
3790 return Context->getSourceManager().isBeforeInTranslationUnit(
3791 IDecl->getLocation(), TagLocation);
3792
3793 }
3794 return false;
3795 }
3796
3797 /// RewriteObjCFieldDeclType - This routine rewrites a type into the buffer.
3798 /// It handles elaborated types, as well as enum types in the process.
RewriteObjCFieldDeclType(QualType & Type,std::string & Result)3799 bool RewriteModernObjC::RewriteObjCFieldDeclType(QualType &Type,
3800 std::string &Result) {
3801 if (isa<TypedefType>(Type)) {
3802 Result += "\t";
3803 return false;
3804 }
3805
3806 if (Type->isArrayType()) {
3807 QualType ElemTy = Context->getBaseElementType(Type);
3808 return RewriteObjCFieldDeclType(ElemTy, Result);
3809 }
3810 else if (Type->isRecordType()) {
3811 RecordDecl *RD = Type->getAs<RecordType>()->getDecl();
3812 if (RD->isCompleteDefinition()) {
3813 if (RD->isStruct())
3814 Result += "\n\tstruct ";
3815 else if (RD->isUnion())
3816 Result += "\n\tunion ";
3817 else
3818 assert(false && "class not allowed as an ivar type");
3819
3820 Result += RD->getName();
3821 if (GlobalDefinedTags.count(RD)) {
3822 // struct/union is defined globally, use it.
3823 Result += " ";
3824 return true;
3825 }
3826 Result += " {\n";
3827 for (RecordDecl::field_iterator i = RD->field_begin(),
3828 e = RD->field_end(); i != e; ++i) {
3829 FieldDecl *FD = *i;
3830 RewriteObjCFieldDecl(FD, Result);
3831 }
3832 Result += "\t} ";
3833 return true;
3834 }
3835 }
3836 else if (Type->isEnumeralType()) {
3837 EnumDecl *ED = Type->getAs<EnumType>()->getDecl();
3838 if (ED->isCompleteDefinition()) {
3839 Result += "\n\tenum ";
3840 Result += ED->getName();
3841 if (GlobalDefinedTags.count(ED)) {
3842 // Enum is globall defined, use it.
3843 Result += " ";
3844 return true;
3845 }
3846
3847 Result += " {\n";
3848 for (EnumDecl::enumerator_iterator EC = ED->enumerator_begin(),
3849 ECEnd = ED->enumerator_end(); EC != ECEnd; ++EC) {
3850 Result += "\t"; Result += EC->getName(); Result += " = ";
3851 llvm::APSInt Val = EC->getInitVal();
3852 Result += Val.toString(10);
3853 Result += ",\n";
3854 }
3855 Result += "\t} ";
3856 return true;
3857 }
3858 }
3859
3860 Result += "\t";
3861 convertObjCTypeToCStyleType(Type);
3862 return false;
3863 }
3864
3865
3866 /// RewriteObjCFieldDecl - This routine rewrites a field into the buffer.
3867 /// It handles elaborated types, as well as enum types in the process.
RewriteObjCFieldDecl(FieldDecl * fieldDecl,std::string & Result)3868 void RewriteModernObjC::RewriteObjCFieldDecl(FieldDecl *fieldDecl,
3869 std::string &Result) {
3870 QualType Type = fieldDecl->getType();
3871 std::string Name = fieldDecl->getNameAsString();
3872
3873 bool EleboratedType = RewriteObjCFieldDeclType(Type, Result);
3874 if (!EleboratedType)
3875 Type.getAsStringInternal(Name, Context->getPrintingPolicy());
3876 Result += Name;
3877 if (fieldDecl->isBitField()) {
3878 Result += " : "; Result += utostr(fieldDecl->getBitWidthValue(*Context));
3879 }
3880 else if (EleboratedType && Type->isArrayType()) {
3881 const ArrayType *AT = Context->getAsArrayType(Type);
3882 do {
3883 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) {
3884 Result += "[";
3885 llvm::APInt Dim = CAT->getSize();
3886 Result += utostr(Dim.getZExtValue());
3887 Result += "]";
3888 }
3889 AT = Context->getAsArrayType(AT->getElementType());
3890 } while (AT);
3891 }
3892
3893 Result += ";\n";
3894 }
3895
3896 /// RewriteLocallyDefinedNamedAggregates - This routine rewrites locally defined
3897 /// named aggregate types into the input buffer.
RewriteLocallyDefinedNamedAggregates(FieldDecl * fieldDecl,std::string & Result)3898 void RewriteModernObjC::RewriteLocallyDefinedNamedAggregates(FieldDecl *fieldDecl,
3899 std::string &Result) {
3900 QualType Type = fieldDecl->getType();
3901 if (isa<TypedefType>(Type))
3902 return;
3903 if (Type->isArrayType())
3904 Type = Context->getBaseElementType(Type);
3905 ObjCContainerDecl *IDecl =
3906 dyn_cast<ObjCContainerDecl>(fieldDecl->getDeclContext());
3907
3908 TagDecl *TD = 0;
3909 if (Type->isRecordType()) {
3910 TD = Type->getAs<RecordType>()->getDecl();
3911 }
3912 else if (Type->isEnumeralType()) {
3913 TD = Type->getAs<EnumType>()->getDecl();
3914 }
3915
3916 if (TD) {
3917 if (GlobalDefinedTags.count(TD))
3918 return;
3919
3920 bool IsNamedDefinition = false;
3921 if (IsTagDefinedInsideClass(IDecl, TD, IsNamedDefinition)) {
3922 RewriteObjCFieldDeclType(Type, Result);
3923 Result += ";";
3924 }
3925 if (IsNamedDefinition)
3926 GlobalDefinedTags.insert(TD);
3927 }
3928
3929 }
3930
ObjCIvarBitfieldGroupNo(ObjCIvarDecl * IV)3931 unsigned RewriteModernObjC::ObjCIvarBitfieldGroupNo(ObjCIvarDecl *IV) {
3932 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3933 if (ObjCInterefaceHasBitfieldGroups.count(CDecl)) {
3934 return IvarGroupNumber[IV];
3935 }
3936 unsigned GroupNo = 0;
3937 SmallVector<const ObjCIvarDecl *, 8> IVars;
3938 for (const ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3939 IVD; IVD = IVD->getNextIvar())
3940 IVars.push_back(IVD);
3941
3942 for (unsigned i = 0, e = IVars.size(); i < e; i++)
3943 if (IVars[i]->isBitField()) {
3944 IvarGroupNumber[IVars[i++]] = ++GroupNo;
3945 while (i < e && IVars[i]->isBitField())
3946 IvarGroupNumber[IVars[i++]] = GroupNo;
3947 if (i < e)
3948 --i;
3949 }
3950
3951 ObjCInterefaceHasBitfieldGroups.insert(CDecl);
3952 return IvarGroupNumber[IV];
3953 }
3954
SynthesizeBitfieldGroupStructType(ObjCIvarDecl * IV,SmallVectorImpl<ObjCIvarDecl * > & IVars)3955 QualType RewriteModernObjC::SynthesizeBitfieldGroupStructType(
3956 ObjCIvarDecl *IV,
3957 SmallVectorImpl<ObjCIvarDecl *> &IVars) {
3958 std::string StructTagName;
3959 ObjCIvarBitfieldGroupType(IV, StructTagName);
3960 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct,
3961 Context->getTranslationUnitDecl(),
3962 SourceLocation(), SourceLocation(),
3963 &Context->Idents.get(StructTagName));
3964 for (unsigned i=0, e = IVars.size(); i < e; i++) {
3965 ObjCIvarDecl *Ivar = IVars[i];
3966 RD->addDecl(FieldDecl::Create(*Context, RD, SourceLocation(), SourceLocation(),
3967 &Context->Idents.get(Ivar->getName()),
3968 Ivar->getType(),
3969 0, /*Expr *BW */Ivar->getBitWidth(), false,
3970 ICIS_NoInit));
3971 }
3972 RD->completeDefinition();
3973 return Context->getTagDeclType(RD);
3974 }
3975
GetGroupRecordTypeForObjCIvarBitfield(ObjCIvarDecl * IV)3976 QualType RewriteModernObjC::GetGroupRecordTypeForObjCIvarBitfield(ObjCIvarDecl *IV) {
3977 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3978 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3979 std::pair<const ObjCInterfaceDecl*, unsigned> tuple = std::make_pair(CDecl, GroupNo);
3980 if (GroupRecordType.count(tuple))
3981 return GroupRecordType[tuple];
3982
3983 SmallVector<ObjCIvarDecl *, 8> IVars;
3984 for (const ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3985 IVD; IVD = IVD->getNextIvar()) {
3986 if (IVD->isBitField())
3987 IVars.push_back(const_cast<ObjCIvarDecl *>(IVD));
3988 else {
3989 if (!IVars.empty()) {
3990 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IVars[0]);
3991 // Generate the struct type for this group of bitfield ivars.
3992 GroupRecordType[std::make_pair(CDecl, GroupNo)] =
3993 SynthesizeBitfieldGroupStructType(IVars[0], IVars);
3994 IVars.clear();
3995 }
3996 }
3997 }
3998 if (!IVars.empty()) {
3999 // Do the last one.
4000 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IVars[0]);
4001 GroupRecordType[std::make_pair(CDecl, GroupNo)] =
4002 SynthesizeBitfieldGroupStructType(IVars[0], IVars);
4003 }
4004 QualType RetQT = GroupRecordType[tuple];
4005 assert(!RetQT.isNull() && "GetGroupRecordTypeForObjCIvarBitfield struct type is NULL");
4006
4007 return RetQT;
4008 }
4009
4010 /// ObjCIvarBitfieldGroupDecl - Names field decl. for ivar bitfield group.
4011 /// Name would be: classname__GRBF_n where n is the group number for this ivar.
ObjCIvarBitfieldGroupDecl(ObjCIvarDecl * IV,std::string & Result)4012 void RewriteModernObjC::ObjCIvarBitfieldGroupDecl(ObjCIvarDecl *IV,
4013 std::string &Result) {
4014 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
4015 Result += CDecl->getName();
4016 Result += "__GRBF_";
4017 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
4018 Result += utostr(GroupNo);
4019 return;
4020 }
4021
4022 /// ObjCIvarBitfieldGroupType - Names struct type for ivar bitfield group.
4023 /// Name of the struct would be: classname__T_n where n is the group number for
4024 /// this ivar.
ObjCIvarBitfieldGroupType(ObjCIvarDecl * IV,std::string & Result)4025 void RewriteModernObjC::ObjCIvarBitfieldGroupType(ObjCIvarDecl *IV,
4026 std::string &Result) {
4027 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
4028 Result += CDecl->getName();
4029 Result += "__T_";
4030 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
4031 Result += utostr(GroupNo);
4032 return;
4033 }
4034
4035 /// ObjCIvarBitfieldGroupOffset - Names symbol for ivar bitfield group field offset.
4036 /// Name would be: OBJC_IVAR_$_classname__GRBF_n where n is the group number for
4037 /// this ivar.
ObjCIvarBitfieldGroupOffset(ObjCIvarDecl * IV,std::string & Result)4038 void RewriteModernObjC::ObjCIvarBitfieldGroupOffset(ObjCIvarDecl *IV,
4039 std::string &Result) {
4040 Result += "OBJC_IVAR_$_";
4041 ObjCIvarBitfieldGroupDecl(IV, Result);
4042 }
4043
4044 #define SKIP_BITFIELDS(IX, ENDIX, VEC) { \
4045 while ((IX < ENDIX) && VEC[IX]->isBitField()) \
4046 ++IX; \
4047 if (IX < ENDIX) \
4048 --IX; \
4049 }
4050
4051 /// RewriteObjCInternalStruct - Rewrite one internal struct corresponding to
4052 /// an objective-c class with ivars.
RewriteObjCInternalStruct(ObjCInterfaceDecl * CDecl,std::string & Result)4053 void RewriteModernObjC::RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
4054 std::string &Result) {
4055 assert(CDecl && "Class missing in SynthesizeObjCInternalStruct");
4056 assert(CDecl->getName() != "" &&
4057 "Name missing in SynthesizeObjCInternalStruct");
4058 ObjCInterfaceDecl *RCDecl = CDecl->getSuperClass();
4059 SmallVector<ObjCIvarDecl *, 8> IVars;
4060 for (ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
4061 IVD; IVD = IVD->getNextIvar())
4062 IVars.push_back(IVD);
4063
4064 SourceLocation LocStart = CDecl->getLocStart();
4065 SourceLocation LocEnd = CDecl->getEndOfDefinitionLoc();
4066
4067 const char *startBuf = SM->getCharacterData(LocStart);
4068 const char *endBuf = SM->getCharacterData(LocEnd);
4069
4070 // If no ivars and no root or if its root, directly or indirectly,
4071 // have no ivars (thus not synthesized) then no need to synthesize this class.
4072 if ((!CDecl->isThisDeclarationADefinition() || IVars.size() == 0) &&
4073 (!RCDecl || !ObjCSynthesizedStructs.count(RCDecl))) {
4074 endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
4075 ReplaceText(LocStart, endBuf-startBuf, Result);
4076 return;
4077 }
4078
4079 // Insert named struct/union definitions inside class to
4080 // outer scope. This follows semantics of locally defined
4081 // struct/unions in objective-c classes.
4082 for (unsigned i = 0, e = IVars.size(); i < e; i++)
4083 RewriteLocallyDefinedNamedAggregates(IVars[i], Result);
4084
4085 // Insert named structs which are syntheized to group ivar bitfields
4086 // to outer scope as well.
4087 for (unsigned i = 0, e = IVars.size(); i < e; i++)
4088 if (IVars[i]->isBitField()) {
4089 ObjCIvarDecl *IV = IVars[i];
4090 QualType QT = GetGroupRecordTypeForObjCIvarBitfield(IV);
4091 RewriteObjCFieldDeclType(QT, Result);
4092 Result += ";";
4093 // skip over ivar bitfields in this group.
4094 SKIP_BITFIELDS(i , e, IVars);
4095 }
4096
4097 Result += "\nstruct ";
4098 Result += CDecl->getNameAsString();
4099 Result += "_IMPL {\n";
4100
4101 if (RCDecl && ObjCSynthesizedStructs.count(RCDecl)) {
4102 Result += "\tstruct "; Result += RCDecl->getNameAsString();
4103 Result += "_IMPL "; Result += RCDecl->getNameAsString();
4104 Result += "_IVARS;\n";
4105 }
4106
4107 for (unsigned i = 0, e = IVars.size(); i < e; i++) {
4108 if (IVars[i]->isBitField()) {
4109 ObjCIvarDecl *IV = IVars[i];
4110 Result += "\tstruct ";
4111 ObjCIvarBitfieldGroupType(IV, Result); Result += " ";
4112 ObjCIvarBitfieldGroupDecl(IV, Result); Result += ";\n";
4113 // skip over ivar bitfields in this group.
4114 SKIP_BITFIELDS(i , e, IVars);
4115 }
4116 else
4117 RewriteObjCFieldDecl(IVars[i], Result);
4118 }
4119
4120 Result += "};\n";
4121 endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
4122 ReplaceText(LocStart, endBuf-startBuf, Result);
4123 // Mark this struct as having been generated.
4124 if (!ObjCSynthesizedStructs.insert(CDecl))
4125 llvm_unreachable("struct already synthesize- RewriteObjCInternalStruct");
4126 }
4127
4128 /// RewriteIvarOffsetSymbols - Rewrite ivar offset symbols of those ivars which
4129 /// have been referenced in an ivar access expression.
RewriteIvarOffsetSymbols(ObjCInterfaceDecl * CDecl,std::string & Result)4130 void RewriteModernObjC::RewriteIvarOffsetSymbols(ObjCInterfaceDecl *CDecl,
4131 std::string &Result) {
4132 // write out ivar offset symbols which have been referenced in an ivar
4133 // access expression.
4134 llvm::SmallPtrSet<ObjCIvarDecl *, 8> Ivars = ReferencedIvars[CDecl];
4135 if (Ivars.empty())
4136 return;
4137
4138 llvm::DenseSet<std::pair<const ObjCInterfaceDecl*, unsigned> > GroupSymbolOutput;
4139 for (llvm::SmallPtrSet<ObjCIvarDecl *, 8>::iterator i = Ivars.begin(),
4140 e = Ivars.end(); i != e; i++) {
4141 ObjCIvarDecl *IvarDecl = (*i);
4142 const ObjCInterfaceDecl *IDecl = IvarDecl->getContainingInterface();
4143 unsigned GroupNo = 0;
4144 if (IvarDecl->isBitField()) {
4145 GroupNo = ObjCIvarBitfieldGroupNo(IvarDecl);
4146 if (GroupSymbolOutput.count(std::make_pair(IDecl, GroupNo)))
4147 continue;
4148 }
4149 Result += "\n";
4150 if (LangOpts.MicrosoftExt)
4151 Result += "__declspec(allocate(\".objc_ivar$B\")) ";
4152 Result += "extern \"C\" ";
4153 if (LangOpts.MicrosoftExt &&
4154 IvarDecl->getAccessControl() != ObjCIvarDecl::Private &&
4155 IvarDecl->getAccessControl() != ObjCIvarDecl::Package)
4156 Result += "__declspec(dllimport) ";
4157
4158 Result += "unsigned long ";
4159 if (IvarDecl->isBitField()) {
4160 ObjCIvarBitfieldGroupOffset(IvarDecl, Result);
4161 GroupSymbolOutput.insert(std::make_pair(IDecl, GroupNo));
4162 }
4163 else
4164 WriteInternalIvarName(CDecl, IvarDecl, Result);
4165 Result += ";";
4166 }
4167 }
4168
4169 //===----------------------------------------------------------------------===//
4170 // Meta Data Emission
4171 //===----------------------------------------------------------------------===//
4172
4173
4174 /// RewriteImplementations - This routine rewrites all method implementations
4175 /// and emits meta-data.
4176
RewriteImplementations()4177 void RewriteModernObjC::RewriteImplementations() {
4178 int ClsDefCount = ClassImplementation.size();
4179 int CatDefCount = CategoryImplementation.size();
4180
4181 // Rewrite implemented methods
4182 for (int i = 0; i < ClsDefCount; i++) {
4183 ObjCImplementationDecl *OIMP = ClassImplementation[i];
4184 ObjCInterfaceDecl *CDecl = OIMP->getClassInterface();
4185 if (CDecl->isImplicitInterfaceDecl())
4186 assert(false &&
4187 "Legacy implicit interface rewriting not supported in moder abi");
4188 RewriteImplementationDecl(OIMP);
4189 }
4190
4191 for (int i = 0; i < CatDefCount; i++) {
4192 ObjCCategoryImplDecl *CIMP = CategoryImplementation[i];
4193 ObjCInterfaceDecl *CDecl = CIMP->getClassInterface();
4194 if (CDecl->isImplicitInterfaceDecl())
4195 assert(false &&
4196 "Legacy implicit interface rewriting not supported in moder abi");
4197 RewriteImplementationDecl(CIMP);
4198 }
4199 }
4200
RewriteByRefString(std::string & ResultStr,const std::string & Name,ValueDecl * VD,bool def)4201 void RewriteModernObjC::RewriteByRefString(std::string &ResultStr,
4202 const std::string &Name,
4203 ValueDecl *VD, bool def) {
4204 assert(BlockByRefDeclNo.count(VD) &&
4205 "RewriteByRefString: ByRef decl missing");
4206 if (def)
4207 ResultStr += "struct ";
4208 ResultStr += "__Block_byref_" + Name +
4209 "_" + utostr(BlockByRefDeclNo[VD]) ;
4210 }
4211
HasLocalVariableExternalStorage(ValueDecl * VD)4212 static bool HasLocalVariableExternalStorage(ValueDecl *VD) {
4213 if (VarDecl *Var = dyn_cast<VarDecl>(VD))
4214 return (Var->isFunctionOrMethodVarDecl() && !Var->hasLocalStorage());
4215 return false;
4216 }
4217
SynthesizeBlockFunc(BlockExpr * CE,int i,StringRef funcName,std::string Tag)4218 std::string RewriteModernObjC::SynthesizeBlockFunc(BlockExpr *CE, int i,
4219 StringRef funcName,
4220 std::string Tag) {
4221 const FunctionType *AFT = CE->getFunctionType();
4222 QualType RT = AFT->getResultType();
4223 std::string StructRef = "struct " + Tag;
4224 SourceLocation BlockLoc = CE->getExprLoc();
4225 std::string S;
4226 ConvertSourceLocationToLineDirective(BlockLoc, S);
4227
4228 S += "static " + RT.getAsString(Context->getPrintingPolicy()) + " __" +
4229 funcName.str() + "_block_func_" + utostr(i);
4230
4231 BlockDecl *BD = CE->getBlockDecl();
4232
4233 if (isa<FunctionNoProtoType>(AFT)) {
4234 // No user-supplied arguments. Still need to pass in a pointer to the
4235 // block (to reference imported block decl refs).
4236 S += "(" + StructRef + " *__cself)";
4237 } else if (BD->param_empty()) {
4238 S += "(" + StructRef + " *__cself)";
4239 } else {
4240 const FunctionProtoType *FT = cast<FunctionProtoType>(AFT);
4241 assert(FT && "SynthesizeBlockFunc: No function proto");
4242 S += '(';
4243 // first add the implicit argument.
4244 S += StructRef + " *__cself, ";
4245 std::string ParamStr;
4246 for (BlockDecl::param_iterator AI = BD->param_begin(),
4247 E = BD->param_end(); AI != E; ++AI) {
4248 if (AI != BD->param_begin()) S += ", ";
4249 ParamStr = (*AI)->getNameAsString();
4250 QualType QT = (*AI)->getType();
4251 (void)convertBlockPointerToFunctionPointer(QT);
4252 QT.getAsStringInternal(ParamStr, Context->getPrintingPolicy());
4253 S += ParamStr;
4254 }
4255 if (FT->isVariadic()) {
4256 if (!BD->param_empty()) S += ", ";
4257 S += "...";
4258 }
4259 S += ')';
4260 }
4261 S += " {\n";
4262
4263 // Create local declarations to avoid rewriting all closure decl ref exprs.
4264 // First, emit a declaration for all "by ref" decls.
4265 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4266 E = BlockByRefDecls.end(); I != E; ++I) {
4267 S += " ";
4268 std::string Name = (*I)->getNameAsString();
4269 std::string TypeString;
4270 RewriteByRefString(TypeString, Name, (*I));
4271 TypeString += " *";
4272 Name = TypeString + Name;
4273 S += Name + " = __cself->" + (*I)->getNameAsString() + "; // bound by ref\n";
4274 }
4275 // Next, emit a declaration for all "by copy" declarations.
4276 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4277 E = BlockByCopyDecls.end(); I != E; ++I) {
4278 S += " ";
4279 // Handle nested closure invocation. For example:
4280 //
4281 // void (^myImportedClosure)(void);
4282 // myImportedClosure = ^(void) { setGlobalInt(x + y); };
4283 //
4284 // void (^anotherClosure)(void);
4285 // anotherClosure = ^(void) {
4286 // myImportedClosure(); // import and invoke the closure
4287 // };
4288 //
4289 if (isTopLevelBlockPointerType((*I)->getType())) {
4290 RewriteBlockPointerTypeVariable(S, (*I));
4291 S += " = (";
4292 RewriteBlockPointerType(S, (*I)->getType());
4293 S += ")";
4294 S += "__cself->" + (*I)->getNameAsString() + "; // bound by copy\n";
4295 }
4296 else {
4297 std::string Name = (*I)->getNameAsString();
4298 QualType QT = (*I)->getType();
4299 if (HasLocalVariableExternalStorage(*I))
4300 QT = Context->getPointerType(QT);
4301 QT.getAsStringInternal(Name, Context->getPrintingPolicy());
4302 S += Name + " = __cself->" +
4303 (*I)->getNameAsString() + "; // bound by copy\n";
4304 }
4305 }
4306 std::string RewrittenStr = RewrittenBlockExprs[CE];
4307 const char *cstr = RewrittenStr.c_str();
4308 while (*cstr++ != '{') ;
4309 S += cstr;
4310 S += "\n";
4311 return S;
4312 }
4313
SynthesizeBlockHelperFuncs(BlockExpr * CE,int i,StringRef funcName,std::string Tag)4314 std::string RewriteModernObjC::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
4315 StringRef funcName,
4316 std::string Tag) {
4317 std::string StructRef = "struct " + Tag;
4318 std::string S = "static void __";
4319
4320 S += funcName;
4321 S += "_block_copy_" + utostr(i);
4322 S += "(" + StructRef;
4323 S += "*dst, " + StructRef;
4324 S += "*src) {";
4325 for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = ImportedBlockDecls.begin(),
4326 E = ImportedBlockDecls.end(); I != E; ++I) {
4327 ValueDecl *VD = (*I);
4328 S += "_Block_object_assign((void*)&dst->";
4329 S += (*I)->getNameAsString();
4330 S += ", (void*)src->";
4331 S += (*I)->getNameAsString();
4332 if (BlockByRefDeclsPtrSet.count((*I)))
4333 S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
4334 else if (VD->getType()->isBlockPointerType())
4335 S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
4336 else
4337 S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
4338 }
4339 S += "}\n";
4340
4341 S += "\nstatic void __";
4342 S += funcName;
4343 S += "_block_dispose_" + utostr(i);
4344 S += "(" + StructRef;
4345 S += "*src) {";
4346 for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = ImportedBlockDecls.begin(),
4347 E = ImportedBlockDecls.end(); I != E; ++I) {
4348 ValueDecl *VD = (*I);
4349 S += "_Block_object_dispose((void*)src->";
4350 S += (*I)->getNameAsString();
4351 if (BlockByRefDeclsPtrSet.count((*I)))
4352 S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
4353 else if (VD->getType()->isBlockPointerType())
4354 S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
4355 else
4356 S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
4357 }
4358 S += "}\n";
4359 return S;
4360 }
4361
SynthesizeBlockImpl(BlockExpr * CE,std::string Tag,std::string Desc)4362 std::string RewriteModernObjC::SynthesizeBlockImpl(BlockExpr *CE, std::string Tag,
4363 std::string Desc) {
4364 std::string S = "\nstruct " + Tag;
4365 std::string Constructor = " " + Tag;
4366
4367 S += " {\n struct __block_impl impl;\n";
4368 S += " struct " + Desc;
4369 S += "* Desc;\n";
4370
4371 Constructor += "(void *fp, "; // Invoke function pointer.
4372 Constructor += "struct " + Desc; // Descriptor pointer.
4373 Constructor += " *desc";
4374
4375 if (BlockDeclRefs.size()) {
4376 // Output all "by copy" declarations.
4377 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4378 E = BlockByCopyDecls.end(); I != E; ++I) {
4379 S += " ";
4380 std::string FieldName = (*I)->getNameAsString();
4381 std::string ArgName = "_" + FieldName;
4382 // Handle nested closure invocation. For example:
4383 //
4384 // void (^myImportedBlock)(void);
4385 // myImportedBlock = ^(void) { setGlobalInt(x + y); };
4386 //
4387 // void (^anotherBlock)(void);
4388 // anotherBlock = ^(void) {
4389 // myImportedBlock(); // import and invoke the closure
4390 // };
4391 //
4392 if (isTopLevelBlockPointerType((*I)->getType())) {
4393 S += "struct __block_impl *";
4394 Constructor += ", void *" + ArgName;
4395 } else {
4396 QualType QT = (*I)->getType();
4397 if (HasLocalVariableExternalStorage(*I))
4398 QT = Context->getPointerType(QT);
4399 QT.getAsStringInternal(FieldName, Context->getPrintingPolicy());
4400 QT.getAsStringInternal(ArgName, Context->getPrintingPolicy());
4401 Constructor += ", " + ArgName;
4402 }
4403 S += FieldName + ";\n";
4404 }
4405 // Output all "by ref" declarations.
4406 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4407 E = BlockByRefDecls.end(); I != E; ++I) {
4408 S += " ";
4409 std::string FieldName = (*I)->getNameAsString();
4410 std::string ArgName = "_" + FieldName;
4411 {
4412 std::string TypeString;
4413 RewriteByRefString(TypeString, FieldName, (*I));
4414 TypeString += " *";
4415 FieldName = TypeString + FieldName;
4416 ArgName = TypeString + ArgName;
4417 Constructor += ", " + ArgName;
4418 }
4419 S += FieldName + "; // by ref\n";
4420 }
4421 // Finish writing the constructor.
4422 Constructor += ", int flags=0)";
4423 // Initialize all "by copy" arguments.
4424 bool firsTime = true;
4425 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4426 E = BlockByCopyDecls.end(); I != E; ++I) {
4427 std::string Name = (*I)->getNameAsString();
4428 if (firsTime) {
4429 Constructor += " : ";
4430 firsTime = false;
4431 }
4432 else
4433 Constructor += ", ";
4434 if (isTopLevelBlockPointerType((*I)->getType()))
4435 Constructor += Name + "((struct __block_impl *)_" + Name + ")";
4436 else
4437 Constructor += Name + "(_" + Name + ")";
4438 }
4439 // Initialize all "by ref" arguments.
4440 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4441 E = BlockByRefDecls.end(); I != E; ++I) {
4442 std::string Name = (*I)->getNameAsString();
4443 if (firsTime) {
4444 Constructor += " : ";
4445 firsTime = false;
4446 }
4447 else
4448 Constructor += ", ";
4449 Constructor += Name + "(_" + Name + "->__forwarding)";
4450 }
4451
4452 Constructor += " {\n";
4453 if (GlobalVarDecl)
4454 Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
4455 else
4456 Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
4457 Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
4458
4459 Constructor += " Desc = desc;\n";
4460 } else {
4461 // Finish writing the constructor.
4462 Constructor += ", int flags=0) {\n";
4463 if (GlobalVarDecl)
4464 Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
4465 else
4466 Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
4467 Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
4468 Constructor += " Desc = desc;\n";
4469 }
4470 Constructor += " ";
4471 Constructor += "}\n";
4472 S += Constructor;
4473 S += "};\n";
4474 return S;
4475 }
4476
SynthesizeBlockDescriptor(std::string DescTag,std::string ImplTag,int i,StringRef FunName,unsigned hasCopy)4477 std::string RewriteModernObjC::SynthesizeBlockDescriptor(std::string DescTag,
4478 std::string ImplTag, int i,
4479 StringRef FunName,
4480 unsigned hasCopy) {
4481 std::string S = "\nstatic struct " + DescTag;
4482
4483 S += " {\n size_t reserved;\n";
4484 S += " size_t Block_size;\n";
4485 if (hasCopy) {
4486 S += " void (*copy)(struct ";
4487 S += ImplTag; S += "*, struct ";
4488 S += ImplTag; S += "*);\n";
4489
4490 S += " void (*dispose)(struct ";
4491 S += ImplTag; S += "*);\n";
4492 }
4493 S += "} ";
4494
4495 S += DescTag + "_DATA = { 0, sizeof(struct ";
4496 S += ImplTag + ")";
4497 if (hasCopy) {
4498 S += ", __" + FunName.str() + "_block_copy_" + utostr(i);
4499 S += ", __" + FunName.str() + "_block_dispose_" + utostr(i);
4500 }
4501 S += "};\n";
4502 return S;
4503 }
4504
SynthesizeBlockLiterals(SourceLocation FunLocStart,StringRef FunName)4505 void RewriteModernObjC::SynthesizeBlockLiterals(SourceLocation FunLocStart,
4506 StringRef FunName) {
4507 bool RewriteSC = (GlobalVarDecl &&
4508 !Blocks.empty() &&
4509 GlobalVarDecl->getStorageClass() == SC_Static &&
4510 GlobalVarDecl->getType().getCVRQualifiers());
4511 if (RewriteSC) {
4512 std::string SC(" void __");
4513 SC += GlobalVarDecl->getNameAsString();
4514 SC += "() {}";
4515 InsertText(FunLocStart, SC);
4516 }
4517
4518 // Insert closures that were part of the function.
4519 for (unsigned i = 0, count=0; i < Blocks.size(); i++) {
4520 CollectBlockDeclRefInfo(Blocks[i]);
4521 // Need to copy-in the inner copied-in variables not actually used in this
4522 // block.
4523 for (int j = 0; j < InnerDeclRefsCount[i]; j++) {
4524 DeclRefExpr *Exp = InnerDeclRefs[count++];
4525 ValueDecl *VD = Exp->getDecl();
4526 BlockDeclRefs.push_back(Exp);
4527 if (!VD->hasAttr<BlocksAttr>()) {
4528 if (!BlockByCopyDeclsPtrSet.count(VD)) {
4529 BlockByCopyDeclsPtrSet.insert(VD);
4530 BlockByCopyDecls.push_back(VD);
4531 }
4532 continue;
4533 }
4534
4535 if (!BlockByRefDeclsPtrSet.count(VD)) {
4536 BlockByRefDeclsPtrSet.insert(VD);
4537 BlockByRefDecls.push_back(VD);
4538 }
4539
4540 // imported objects in the inner blocks not used in the outer
4541 // blocks must be copied/disposed in the outer block as well.
4542 if (VD->getType()->isObjCObjectPointerType() ||
4543 VD->getType()->isBlockPointerType())
4544 ImportedBlockDecls.insert(VD);
4545 }
4546
4547 std::string ImplTag = "__" + FunName.str() + "_block_impl_" + utostr(i);
4548 std::string DescTag = "__" + FunName.str() + "_block_desc_" + utostr(i);
4549
4550 std::string CI = SynthesizeBlockImpl(Blocks[i], ImplTag, DescTag);
4551
4552 InsertText(FunLocStart, CI);
4553
4554 std::string CF = SynthesizeBlockFunc(Blocks[i], i, FunName, ImplTag);
4555
4556 InsertText(FunLocStart, CF);
4557
4558 if (ImportedBlockDecls.size()) {
4559 std::string HF = SynthesizeBlockHelperFuncs(Blocks[i], i, FunName, ImplTag);
4560 InsertText(FunLocStart, HF);
4561 }
4562 std::string BD = SynthesizeBlockDescriptor(DescTag, ImplTag, i, FunName,
4563 ImportedBlockDecls.size() > 0);
4564 InsertText(FunLocStart, BD);
4565
4566 BlockDeclRefs.clear();
4567 BlockByRefDecls.clear();
4568 BlockByRefDeclsPtrSet.clear();
4569 BlockByCopyDecls.clear();
4570 BlockByCopyDeclsPtrSet.clear();
4571 ImportedBlockDecls.clear();
4572 }
4573 if (RewriteSC) {
4574 // Must insert any 'const/volatile/static here. Since it has been
4575 // removed as result of rewriting of block literals.
4576 std::string SC;
4577 if (GlobalVarDecl->getStorageClass() == SC_Static)
4578 SC = "static ";
4579 if (GlobalVarDecl->getType().isConstQualified())
4580 SC += "const ";
4581 if (GlobalVarDecl->getType().isVolatileQualified())
4582 SC += "volatile ";
4583 if (GlobalVarDecl->getType().isRestrictQualified())
4584 SC += "restrict ";
4585 InsertText(FunLocStart, SC);
4586 }
4587 if (GlobalConstructionExp) {
4588 // extra fancy dance for global literal expression.
4589
4590 // Always the latest block expression on the block stack.
4591 std::string Tag = "__";
4592 Tag += FunName;
4593 Tag += "_block_impl_";
4594 Tag += utostr(Blocks.size()-1);
4595 std::string globalBuf = "static ";
4596 globalBuf += Tag; globalBuf += " ";
4597 std::string SStr;
4598
4599 llvm::raw_string_ostream constructorExprBuf(SStr);
4600 GlobalConstructionExp->printPretty(constructorExprBuf, 0,
4601 PrintingPolicy(LangOpts));
4602 globalBuf += constructorExprBuf.str();
4603 globalBuf += ";\n";
4604 InsertText(FunLocStart, globalBuf);
4605 GlobalConstructionExp = 0;
4606 }
4607
4608 Blocks.clear();
4609 InnerDeclRefsCount.clear();
4610 InnerDeclRefs.clear();
4611 RewrittenBlockExprs.clear();
4612 }
4613
InsertBlockLiteralsWithinFunction(FunctionDecl * FD)4614 void RewriteModernObjC::InsertBlockLiteralsWithinFunction(FunctionDecl *FD) {
4615 SourceLocation FunLocStart =
4616 (!Blocks.empty()) ? getFunctionSourceLocation(*this, FD)
4617 : FD->getTypeSpecStartLoc();
4618 StringRef FuncName = FD->getName();
4619
4620 SynthesizeBlockLiterals(FunLocStart, FuncName);
4621 }
4622
BuildUniqueMethodName(std::string & Name,ObjCMethodDecl * MD)4623 static void BuildUniqueMethodName(std::string &Name,
4624 ObjCMethodDecl *MD) {
4625 ObjCInterfaceDecl *IFace = MD->getClassInterface();
4626 Name = IFace->getName();
4627 Name += "__" + MD->getSelector().getAsString();
4628 // Convert colons to underscores.
4629 std::string::size_type loc = 0;
4630 while ((loc = Name.find(":", loc)) != std::string::npos)
4631 Name.replace(loc, 1, "_");
4632 }
4633
InsertBlockLiteralsWithinMethod(ObjCMethodDecl * MD)4634 void RewriteModernObjC::InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD) {
4635 //fprintf(stderr,"In InsertBlockLiteralsWitinMethod\n");
4636 //SourceLocation FunLocStart = MD->getLocStart();
4637 SourceLocation FunLocStart = MD->getLocStart();
4638 std::string FuncName;
4639 BuildUniqueMethodName(FuncName, MD);
4640 SynthesizeBlockLiterals(FunLocStart, FuncName);
4641 }
4642
GetBlockDeclRefExprs(Stmt * S)4643 void RewriteModernObjC::GetBlockDeclRefExprs(Stmt *S) {
4644 for (Stmt::child_range CI = S->children(); CI; ++CI)
4645 if (*CI) {
4646 if (BlockExpr *CBE = dyn_cast<BlockExpr>(*CI))
4647 GetBlockDeclRefExprs(CBE->getBody());
4648 else
4649 GetBlockDeclRefExprs(*CI);
4650 }
4651 // Handle specific things.
4652 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
4653 if (DRE->refersToEnclosingLocal()) {
4654 // FIXME: Handle enums.
4655 if (!isa<FunctionDecl>(DRE->getDecl()))
4656 BlockDeclRefs.push_back(DRE);
4657 if (HasLocalVariableExternalStorage(DRE->getDecl()))
4658 BlockDeclRefs.push_back(DRE);
4659 }
4660 }
4661
4662 return;
4663 }
4664
GetInnerBlockDeclRefExprs(Stmt * S,SmallVectorImpl<DeclRefExpr * > & InnerBlockDeclRefs,llvm::SmallPtrSet<const DeclContext *,8> & InnerContexts)4665 void RewriteModernObjC::GetInnerBlockDeclRefExprs(Stmt *S,
4666 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
4667 llvm::SmallPtrSet<const DeclContext *, 8> &InnerContexts) {
4668 for (Stmt::child_range CI = S->children(); CI; ++CI)
4669 if (*CI) {
4670 if (BlockExpr *CBE = dyn_cast<BlockExpr>(*CI)) {
4671 InnerContexts.insert(cast<DeclContext>(CBE->getBlockDecl()));
4672 GetInnerBlockDeclRefExprs(CBE->getBody(),
4673 InnerBlockDeclRefs,
4674 InnerContexts);
4675 }
4676 else
4677 GetInnerBlockDeclRefExprs(*CI,
4678 InnerBlockDeclRefs,
4679 InnerContexts);
4680
4681 }
4682 // Handle specific things.
4683 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
4684 if (DRE->refersToEnclosingLocal()) {
4685 if (!isa<FunctionDecl>(DRE->getDecl()) &&
4686 !InnerContexts.count(DRE->getDecl()->getDeclContext()))
4687 InnerBlockDeclRefs.push_back(DRE);
4688 if (VarDecl *Var = dyn_cast<VarDecl>(DRE->getDecl()))
4689 if (Var->isFunctionOrMethodVarDecl())
4690 ImportedLocalExternalDecls.insert(Var);
4691 }
4692 }
4693
4694 return;
4695 }
4696
4697 /// convertObjCTypeToCStyleType - This routine converts such objc types
4698 /// as qualified objects, and blocks to their closest c/c++ types that
4699 /// it can. It returns true if input type was modified.
convertObjCTypeToCStyleType(QualType & T)4700 bool RewriteModernObjC::convertObjCTypeToCStyleType(QualType &T) {
4701 QualType oldT = T;
4702 convertBlockPointerToFunctionPointer(T);
4703 if (T->isFunctionPointerType()) {
4704 QualType PointeeTy;
4705 if (const PointerType* PT = T->getAs<PointerType>()) {
4706 PointeeTy = PT->getPointeeType();
4707 if (const FunctionType *FT = PointeeTy->getAs<FunctionType>()) {
4708 T = convertFunctionTypeOfBlocks(FT);
4709 T = Context->getPointerType(T);
4710 }
4711 }
4712 }
4713
4714 convertToUnqualifiedObjCType(T);
4715 return T != oldT;
4716 }
4717
4718 /// convertFunctionTypeOfBlocks - This routine converts a function type
4719 /// whose result type may be a block pointer or whose argument type(s)
4720 /// might be block pointers to an equivalent function type replacing
4721 /// all block pointers to function pointers.
convertFunctionTypeOfBlocks(const FunctionType * FT)4722 QualType RewriteModernObjC::convertFunctionTypeOfBlocks(const FunctionType *FT) {
4723 const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
4724 // FTP will be null for closures that don't take arguments.
4725 // Generate a funky cast.
4726 SmallVector<QualType, 8> ArgTypes;
4727 QualType Res = FT->getResultType();
4728 bool modified = convertObjCTypeToCStyleType(Res);
4729
4730 if (FTP) {
4731 for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
4732 E = FTP->arg_type_end(); I && (I != E); ++I) {
4733 QualType t = *I;
4734 // Make sure we convert "t (^)(...)" to "t (*)(...)".
4735 if (convertObjCTypeToCStyleType(t))
4736 modified = true;
4737 ArgTypes.push_back(t);
4738 }
4739 }
4740 QualType FuncType;
4741 if (modified)
4742 FuncType = getSimpleFunctionType(Res, ArgTypes);
4743 else FuncType = QualType(FT, 0);
4744 return FuncType;
4745 }
4746
SynthesizeBlockCall(CallExpr * Exp,const Expr * BlockExp)4747 Stmt *RewriteModernObjC::SynthesizeBlockCall(CallExpr *Exp, const Expr *BlockExp) {
4748 // Navigate to relevant type information.
4749 const BlockPointerType *CPT = 0;
4750
4751 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(BlockExp)) {
4752 CPT = DRE->getType()->getAs<BlockPointerType>();
4753 } else if (const MemberExpr *MExpr = dyn_cast<MemberExpr>(BlockExp)) {
4754 CPT = MExpr->getType()->getAs<BlockPointerType>();
4755 }
4756 else if (const ParenExpr *PRE = dyn_cast<ParenExpr>(BlockExp)) {
4757 return SynthesizeBlockCall(Exp, PRE->getSubExpr());
4758 }
4759 else if (const ImplicitCastExpr *IEXPR = dyn_cast<ImplicitCastExpr>(BlockExp))
4760 CPT = IEXPR->getType()->getAs<BlockPointerType>();
4761 else if (const ConditionalOperator *CEXPR =
4762 dyn_cast<ConditionalOperator>(BlockExp)) {
4763 Expr *LHSExp = CEXPR->getLHS();
4764 Stmt *LHSStmt = SynthesizeBlockCall(Exp, LHSExp);
4765 Expr *RHSExp = CEXPR->getRHS();
4766 Stmt *RHSStmt = SynthesizeBlockCall(Exp, RHSExp);
4767 Expr *CONDExp = CEXPR->getCond();
4768 ConditionalOperator *CondExpr =
4769 new (Context) ConditionalOperator(CONDExp,
4770 SourceLocation(), cast<Expr>(LHSStmt),
4771 SourceLocation(), cast<Expr>(RHSStmt),
4772 Exp->getType(), VK_RValue, OK_Ordinary);
4773 return CondExpr;
4774 } else if (const ObjCIvarRefExpr *IRE = dyn_cast<ObjCIvarRefExpr>(BlockExp)) {
4775 CPT = IRE->getType()->getAs<BlockPointerType>();
4776 } else if (const PseudoObjectExpr *POE
4777 = dyn_cast<PseudoObjectExpr>(BlockExp)) {
4778 CPT = POE->getType()->castAs<BlockPointerType>();
4779 } else {
4780 assert(1 && "RewriteBlockClass: Bad type");
4781 }
4782 assert(CPT && "RewriteBlockClass: Bad type");
4783 const FunctionType *FT = CPT->getPointeeType()->getAs<FunctionType>();
4784 assert(FT && "RewriteBlockClass: Bad type");
4785 const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
4786 // FTP will be null for closures that don't take arguments.
4787
4788 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
4789 SourceLocation(), SourceLocation(),
4790 &Context->Idents.get("__block_impl"));
4791 QualType PtrBlock = Context->getPointerType(Context->getTagDeclType(RD));
4792
4793 // Generate a funky cast.
4794 SmallVector<QualType, 8> ArgTypes;
4795
4796 // Push the block argument type.
4797 ArgTypes.push_back(PtrBlock);
4798 if (FTP) {
4799 for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
4800 E = FTP->arg_type_end(); I && (I != E); ++I) {
4801 QualType t = *I;
4802 // Make sure we convert "t (^)(...)" to "t (*)(...)".
4803 if (!convertBlockPointerToFunctionPointer(t))
4804 convertToUnqualifiedObjCType(t);
4805 ArgTypes.push_back(t);
4806 }
4807 }
4808 // Now do the pointer to function cast.
4809 QualType PtrToFuncCastType = getSimpleFunctionType(Exp->getType(), ArgTypes);
4810
4811 PtrToFuncCastType = Context->getPointerType(PtrToFuncCastType);
4812
4813 CastExpr *BlkCast = NoTypeInfoCStyleCastExpr(Context, PtrBlock,
4814 CK_BitCast,
4815 const_cast<Expr*>(BlockExp));
4816 // Don't forget the parens to enforce the proper binding.
4817 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
4818 BlkCast);
4819 //PE->dump();
4820
4821 FieldDecl *FD = FieldDecl::Create(*Context, 0, SourceLocation(),
4822 SourceLocation(),
4823 &Context->Idents.get("FuncPtr"),
4824 Context->VoidPtrTy, 0,
4825 /*BitWidth=*/0, /*Mutable=*/true,
4826 ICIS_NoInit);
4827 MemberExpr *ME = new (Context) MemberExpr(PE, true, FD, SourceLocation(),
4828 FD->getType(), VK_LValue,
4829 OK_Ordinary);
4830
4831
4832 CastExpr *FunkCast = NoTypeInfoCStyleCastExpr(Context, PtrToFuncCastType,
4833 CK_BitCast, ME);
4834 PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), FunkCast);
4835
4836 SmallVector<Expr*, 8> BlkExprs;
4837 // Add the implicit argument.
4838 BlkExprs.push_back(BlkCast);
4839 // Add the user arguments.
4840 for (CallExpr::arg_iterator I = Exp->arg_begin(),
4841 E = Exp->arg_end(); I != E; ++I) {
4842 BlkExprs.push_back(*I);
4843 }
4844 CallExpr *CE = new (Context) CallExpr(*Context, PE, BlkExprs,
4845 Exp->getType(), VK_RValue,
4846 SourceLocation());
4847 return CE;
4848 }
4849
4850 // We need to return the rewritten expression to handle cases where the
4851 // DeclRefExpr is embedded in another expression being rewritten.
4852 // For example:
4853 //
4854 // int main() {
4855 // __block Foo *f;
4856 // __block int i;
4857 //
4858 // void (^myblock)() = ^() {
4859 // [f test]; // f is a DeclRefExpr embedded in a message (which is being rewritten).
4860 // i = 77;
4861 // };
4862 //}
RewriteBlockDeclRefExpr(DeclRefExpr * DeclRefExp)4863 Stmt *RewriteModernObjC::RewriteBlockDeclRefExpr(DeclRefExpr *DeclRefExp) {
4864 // Rewrite the byref variable into BYREFVAR->__forwarding->BYREFVAR
4865 // for each DeclRefExp where BYREFVAR is name of the variable.
4866 ValueDecl *VD = DeclRefExp->getDecl();
4867 bool isArrow = DeclRefExp->refersToEnclosingLocal();
4868
4869 FieldDecl *FD = FieldDecl::Create(*Context, 0, SourceLocation(),
4870 SourceLocation(),
4871 &Context->Idents.get("__forwarding"),
4872 Context->VoidPtrTy, 0,
4873 /*BitWidth=*/0, /*Mutable=*/true,
4874 ICIS_NoInit);
4875 MemberExpr *ME = new (Context) MemberExpr(DeclRefExp, isArrow,
4876 FD, SourceLocation(),
4877 FD->getType(), VK_LValue,
4878 OK_Ordinary);
4879
4880 StringRef Name = VD->getName();
4881 FD = FieldDecl::Create(*Context, 0, SourceLocation(), SourceLocation(),
4882 &Context->Idents.get(Name),
4883 Context->VoidPtrTy, 0,
4884 /*BitWidth=*/0, /*Mutable=*/true,
4885 ICIS_NoInit);
4886 ME = new (Context) MemberExpr(ME, true, FD, SourceLocation(),
4887 DeclRefExp->getType(), VK_LValue, OK_Ordinary);
4888
4889
4890
4891 // Need parens to enforce precedence.
4892 ParenExpr *PE = new (Context) ParenExpr(DeclRefExp->getExprLoc(),
4893 DeclRefExp->getExprLoc(),
4894 ME);
4895 ReplaceStmt(DeclRefExp, PE);
4896 return PE;
4897 }
4898
4899 // Rewrites the imported local variable V with external storage
4900 // (static, extern, etc.) as *V
4901 //
RewriteLocalVariableExternalStorage(DeclRefExpr * DRE)4902 Stmt *RewriteModernObjC::RewriteLocalVariableExternalStorage(DeclRefExpr *DRE) {
4903 ValueDecl *VD = DRE->getDecl();
4904 if (VarDecl *Var = dyn_cast<VarDecl>(VD))
4905 if (!ImportedLocalExternalDecls.count(Var))
4906 return DRE;
4907 Expr *Exp = new (Context) UnaryOperator(DRE, UO_Deref, DRE->getType(),
4908 VK_LValue, OK_Ordinary,
4909 DRE->getLocation());
4910 // Need parens to enforce precedence.
4911 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
4912 Exp);
4913 ReplaceStmt(DRE, PE);
4914 return PE;
4915 }
4916
RewriteCastExpr(CStyleCastExpr * CE)4917 void RewriteModernObjC::RewriteCastExpr(CStyleCastExpr *CE) {
4918 SourceLocation LocStart = CE->getLParenLoc();
4919 SourceLocation LocEnd = CE->getRParenLoc();
4920
4921 // Need to avoid trying to rewrite synthesized casts.
4922 if (LocStart.isInvalid())
4923 return;
4924 // Need to avoid trying to rewrite casts contained in macros.
4925 if (!Rewriter::isRewritable(LocStart) || !Rewriter::isRewritable(LocEnd))
4926 return;
4927
4928 const char *startBuf = SM->getCharacterData(LocStart);
4929 const char *endBuf = SM->getCharacterData(LocEnd);
4930 QualType QT = CE->getType();
4931 const Type* TypePtr = QT->getAs<Type>();
4932 if (isa<TypeOfExprType>(TypePtr)) {
4933 const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
4934 QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
4935 std::string TypeAsString = "(";
4936 RewriteBlockPointerType(TypeAsString, QT);
4937 TypeAsString += ")";
4938 ReplaceText(LocStart, endBuf-startBuf+1, TypeAsString);
4939 return;
4940 }
4941 // advance the location to startArgList.
4942 const char *argPtr = startBuf;
4943
4944 while (*argPtr++ && (argPtr < endBuf)) {
4945 switch (*argPtr) {
4946 case '^':
4947 // Replace the '^' with '*'.
4948 LocStart = LocStart.getLocWithOffset(argPtr-startBuf);
4949 ReplaceText(LocStart, 1, "*");
4950 break;
4951 }
4952 }
4953 return;
4954 }
4955
RewriteImplicitCastObjCExpr(CastExpr * IC)4956 void RewriteModernObjC::RewriteImplicitCastObjCExpr(CastExpr *IC) {
4957 CastKind CastKind = IC->getCastKind();
4958 if (CastKind != CK_BlockPointerToObjCPointerCast &&
4959 CastKind != CK_AnyPointerToBlockPointerCast)
4960 return;
4961
4962 QualType QT = IC->getType();
4963 (void)convertBlockPointerToFunctionPointer(QT);
4964 std::string TypeString(QT.getAsString(Context->getPrintingPolicy()));
4965 std::string Str = "(";
4966 Str += TypeString;
4967 Str += ")";
4968 InsertText(IC->getSubExpr()->getLocStart(), &Str[0], Str.size());
4969
4970 return;
4971 }
4972
RewriteBlockPointerFunctionArgs(FunctionDecl * FD)4973 void RewriteModernObjC::RewriteBlockPointerFunctionArgs(FunctionDecl *FD) {
4974 SourceLocation DeclLoc = FD->getLocation();
4975 unsigned parenCount = 0;
4976
4977 // We have 1 or more arguments that have closure pointers.
4978 const char *startBuf = SM->getCharacterData(DeclLoc);
4979 const char *startArgList = strchr(startBuf, '(');
4980
4981 assert((*startArgList == '(') && "Rewriter fuzzy parser confused");
4982
4983 parenCount++;
4984 // advance the location to startArgList.
4985 DeclLoc = DeclLoc.getLocWithOffset(startArgList-startBuf);
4986 assert((DeclLoc.isValid()) && "Invalid DeclLoc");
4987
4988 const char *argPtr = startArgList;
4989
4990 while (*argPtr++ && parenCount) {
4991 switch (*argPtr) {
4992 case '^':
4993 // Replace the '^' with '*'.
4994 DeclLoc = DeclLoc.getLocWithOffset(argPtr-startArgList);
4995 ReplaceText(DeclLoc, 1, "*");
4996 break;
4997 case '(':
4998 parenCount++;
4999 break;
5000 case ')':
5001 parenCount--;
5002 break;
5003 }
5004 }
5005 return;
5006 }
5007
PointerTypeTakesAnyBlockArguments(QualType QT)5008 bool RewriteModernObjC::PointerTypeTakesAnyBlockArguments(QualType QT) {
5009 const FunctionProtoType *FTP;
5010 const PointerType *PT = QT->getAs<PointerType>();
5011 if (PT) {
5012 FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
5013 } else {
5014 const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
5015 assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
5016 FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
5017 }
5018 if (FTP) {
5019 for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
5020 E = FTP->arg_type_end(); I != E; ++I)
5021 if (isTopLevelBlockPointerType(*I))
5022 return true;
5023 }
5024 return false;
5025 }
5026
PointerTypeTakesAnyObjCQualifiedType(QualType QT)5027 bool RewriteModernObjC::PointerTypeTakesAnyObjCQualifiedType(QualType QT) {
5028 const FunctionProtoType *FTP;
5029 const PointerType *PT = QT->getAs<PointerType>();
5030 if (PT) {
5031 FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
5032 } else {
5033 const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
5034 assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
5035 FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
5036 }
5037 if (FTP) {
5038 for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
5039 E = FTP->arg_type_end(); I != E; ++I) {
5040 if ((*I)->isObjCQualifiedIdType())
5041 return true;
5042 if ((*I)->isObjCObjectPointerType() &&
5043 (*I)->getPointeeType()->isObjCQualifiedInterfaceType())
5044 return true;
5045 }
5046
5047 }
5048 return false;
5049 }
5050
GetExtentOfArgList(const char * Name,const char * & LParen,const char * & RParen)5051 void RewriteModernObjC::GetExtentOfArgList(const char *Name, const char *&LParen,
5052 const char *&RParen) {
5053 const char *argPtr = strchr(Name, '(');
5054 assert((*argPtr == '(') && "Rewriter fuzzy parser confused");
5055
5056 LParen = argPtr; // output the start.
5057 argPtr++; // skip past the left paren.
5058 unsigned parenCount = 1;
5059
5060 while (*argPtr && parenCount) {
5061 switch (*argPtr) {
5062 case '(': parenCount++; break;
5063 case ')': parenCount--; break;
5064 default: break;
5065 }
5066 if (parenCount) argPtr++;
5067 }
5068 assert((*argPtr == ')') && "Rewriter fuzzy parser confused");
5069 RParen = argPtr; // output the end
5070 }
5071
RewriteBlockPointerDecl(NamedDecl * ND)5072 void RewriteModernObjC::RewriteBlockPointerDecl(NamedDecl *ND) {
5073 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
5074 RewriteBlockPointerFunctionArgs(FD);
5075 return;
5076 }
5077 // Handle Variables and Typedefs.
5078 SourceLocation DeclLoc = ND->getLocation();
5079 QualType DeclT;
5080 if (VarDecl *VD = dyn_cast<VarDecl>(ND))
5081 DeclT = VD->getType();
5082 else if (TypedefNameDecl *TDD = dyn_cast<TypedefNameDecl>(ND))
5083 DeclT = TDD->getUnderlyingType();
5084 else if (FieldDecl *FD = dyn_cast<FieldDecl>(ND))
5085 DeclT = FD->getType();
5086 else
5087 llvm_unreachable("RewriteBlockPointerDecl(): Decl type not yet handled");
5088
5089 const char *startBuf = SM->getCharacterData(DeclLoc);
5090 const char *endBuf = startBuf;
5091 // scan backward (from the decl location) for the end of the previous decl.
5092 while (*startBuf != '^' && *startBuf != ';' && startBuf != MainFileStart)
5093 startBuf--;
5094 SourceLocation Start = DeclLoc.getLocWithOffset(startBuf-endBuf);
5095 std::string buf;
5096 unsigned OrigLength=0;
5097 // *startBuf != '^' if we are dealing with a pointer to function that
5098 // may take block argument types (which will be handled below).
5099 if (*startBuf == '^') {
5100 // Replace the '^' with '*', computing a negative offset.
5101 buf = '*';
5102 startBuf++;
5103 OrigLength++;
5104 }
5105 while (*startBuf != ')') {
5106 buf += *startBuf;
5107 startBuf++;
5108 OrigLength++;
5109 }
5110 buf += ')';
5111 OrigLength++;
5112
5113 if (PointerTypeTakesAnyBlockArguments(DeclT) ||
5114 PointerTypeTakesAnyObjCQualifiedType(DeclT)) {
5115 // Replace the '^' with '*' for arguments.
5116 // Replace id<P> with id/*<>*/
5117 DeclLoc = ND->getLocation();
5118 startBuf = SM->getCharacterData(DeclLoc);
5119 const char *argListBegin, *argListEnd;
5120 GetExtentOfArgList(startBuf, argListBegin, argListEnd);
5121 while (argListBegin < argListEnd) {
5122 if (*argListBegin == '^')
5123 buf += '*';
5124 else if (*argListBegin == '<') {
5125 buf += "/*";
5126 buf += *argListBegin++;
5127 OrigLength++;
5128 while (*argListBegin != '>') {
5129 buf += *argListBegin++;
5130 OrigLength++;
5131 }
5132 buf += *argListBegin;
5133 buf += "*/";
5134 }
5135 else
5136 buf += *argListBegin;
5137 argListBegin++;
5138 OrigLength++;
5139 }
5140 buf += ')';
5141 OrigLength++;
5142 }
5143 ReplaceText(Start, OrigLength, buf);
5144
5145 return;
5146 }
5147
5148
5149 /// SynthesizeByrefCopyDestroyHelper - This routine synthesizes:
5150 /// void __Block_byref_id_object_copy(struct Block_byref_id_object *dst,
5151 /// struct Block_byref_id_object *src) {
5152 /// _Block_object_assign (&_dest->object, _src->object,
5153 /// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
5154 /// [|BLOCK_FIELD_IS_WEAK]) // object
5155 /// _Block_object_assign(&_dest->object, _src->object,
5156 /// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
5157 /// [|BLOCK_FIELD_IS_WEAK]) // block
5158 /// }
5159 /// And:
5160 /// void __Block_byref_id_object_dispose(struct Block_byref_id_object *_src) {
5161 /// _Block_object_dispose(_src->object,
5162 /// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
5163 /// [|BLOCK_FIELD_IS_WEAK]) // object
5164 /// _Block_object_dispose(_src->object,
5165 /// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
5166 /// [|BLOCK_FIELD_IS_WEAK]) // block
5167 /// }
5168
SynthesizeByrefCopyDestroyHelper(VarDecl * VD,int flag)5169 std::string RewriteModernObjC::SynthesizeByrefCopyDestroyHelper(VarDecl *VD,
5170 int flag) {
5171 std::string S;
5172 if (CopyDestroyCache.count(flag))
5173 return S;
5174 CopyDestroyCache.insert(flag);
5175 S = "static void __Block_byref_id_object_copy_";
5176 S += utostr(flag);
5177 S += "(void *dst, void *src) {\n";
5178
5179 // offset into the object pointer is computed as:
5180 // void * + void* + int + int + void* + void *
5181 unsigned IntSize =
5182 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
5183 unsigned VoidPtrSize =
5184 static_cast<unsigned>(Context->getTypeSize(Context->VoidPtrTy));
5185
5186 unsigned offset = (VoidPtrSize*4 + IntSize + IntSize)/Context->getCharWidth();
5187 S += " _Block_object_assign((char*)dst + ";
5188 S += utostr(offset);
5189 S += ", *(void * *) ((char*)src + ";
5190 S += utostr(offset);
5191 S += "), ";
5192 S += utostr(flag);
5193 S += ");\n}\n";
5194
5195 S += "static void __Block_byref_id_object_dispose_";
5196 S += utostr(flag);
5197 S += "(void *src) {\n";
5198 S += " _Block_object_dispose(*(void * *) ((char*)src + ";
5199 S += utostr(offset);
5200 S += "), ";
5201 S += utostr(flag);
5202 S += ");\n}\n";
5203 return S;
5204 }
5205
5206 /// RewriteByRefVar - For each __block typex ND variable this routine transforms
5207 /// the declaration into:
5208 /// struct __Block_byref_ND {
5209 /// void *__isa; // NULL for everything except __weak pointers
5210 /// struct __Block_byref_ND *__forwarding;
5211 /// int32_t __flags;
5212 /// int32_t __size;
5213 /// void *__Block_byref_id_object_copy; // If variable is __block ObjC object
5214 /// void *__Block_byref_id_object_dispose; // If variable is __block ObjC object
5215 /// typex ND;
5216 /// };
5217 ///
5218 /// It then replaces declaration of ND variable with:
5219 /// struct __Block_byref_ND ND = {__isa=0B, __forwarding=&ND, __flags=some_flag,
5220 /// __size=sizeof(struct __Block_byref_ND),
5221 /// ND=initializer-if-any};
5222 ///
5223 ///
RewriteByRefVar(VarDecl * ND,bool firstDecl,bool lastDecl)5224 void RewriteModernObjC::RewriteByRefVar(VarDecl *ND, bool firstDecl,
5225 bool lastDecl) {
5226 int flag = 0;
5227 int isa = 0;
5228 SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
5229 if (DeclLoc.isInvalid())
5230 // If type location is missing, it is because of missing type (a warning).
5231 // Use variable's location which is good for this case.
5232 DeclLoc = ND->getLocation();
5233 const char *startBuf = SM->getCharacterData(DeclLoc);
5234 SourceLocation X = ND->getLocEnd();
5235 X = SM->getExpansionLoc(X);
5236 const char *endBuf = SM->getCharacterData(X);
5237 std::string Name(ND->getNameAsString());
5238 std::string ByrefType;
5239 RewriteByRefString(ByrefType, Name, ND, true);
5240 ByrefType += " {\n";
5241 ByrefType += " void *__isa;\n";
5242 RewriteByRefString(ByrefType, Name, ND);
5243 ByrefType += " *__forwarding;\n";
5244 ByrefType += " int __flags;\n";
5245 ByrefType += " int __size;\n";
5246 // Add void *__Block_byref_id_object_copy;
5247 // void *__Block_byref_id_object_dispose; if needed.
5248 QualType Ty = ND->getType();
5249 bool HasCopyAndDispose = Context->BlockRequiresCopying(Ty, ND);
5250 if (HasCopyAndDispose) {
5251 ByrefType += " void (*__Block_byref_id_object_copy)(void*, void*);\n";
5252 ByrefType += " void (*__Block_byref_id_object_dispose)(void*);\n";
5253 }
5254
5255 QualType T = Ty;
5256 (void)convertBlockPointerToFunctionPointer(T);
5257 T.getAsStringInternal(Name, Context->getPrintingPolicy());
5258
5259 ByrefType += " " + Name + ";\n";
5260 ByrefType += "};\n";
5261 // Insert this type in global scope. It is needed by helper function.
5262 SourceLocation FunLocStart;
5263 if (CurFunctionDef)
5264 FunLocStart = getFunctionSourceLocation(*this, CurFunctionDef);
5265 else {
5266 assert(CurMethodDef && "RewriteByRefVar - CurMethodDef is null");
5267 FunLocStart = CurMethodDef->getLocStart();
5268 }
5269 InsertText(FunLocStart, ByrefType);
5270
5271 if (Ty.isObjCGCWeak()) {
5272 flag |= BLOCK_FIELD_IS_WEAK;
5273 isa = 1;
5274 }
5275 if (HasCopyAndDispose) {
5276 flag = BLOCK_BYREF_CALLER;
5277 QualType Ty = ND->getType();
5278 // FIXME. Handle __weak variable (BLOCK_FIELD_IS_WEAK) as well.
5279 if (Ty->isBlockPointerType())
5280 flag |= BLOCK_FIELD_IS_BLOCK;
5281 else
5282 flag |= BLOCK_FIELD_IS_OBJECT;
5283 std::string HF = SynthesizeByrefCopyDestroyHelper(ND, flag);
5284 if (!HF.empty())
5285 Preamble += HF;
5286 }
5287
5288 // struct __Block_byref_ND ND =
5289 // {0, &ND, some_flag, __size=sizeof(struct __Block_byref_ND),
5290 // initializer-if-any};
5291 bool hasInit = (ND->getInit() != 0);
5292 // FIXME. rewriter does not support __block c++ objects which
5293 // require construction.
5294 if (hasInit)
5295 if (CXXConstructExpr *CExp = dyn_cast<CXXConstructExpr>(ND->getInit())) {
5296 CXXConstructorDecl *CXXDecl = CExp->getConstructor();
5297 if (CXXDecl && CXXDecl->isDefaultConstructor())
5298 hasInit = false;
5299 }
5300
5301 unsigned flags = 0;
5302 if (HasCopyAndDispose)
5303 flags |= BLOCK_HAS_COPY_DISPOSE;
5304 Name = ND->getNameAsString();
5305 ByrefType.clear();
5306 RewriteByRefString(ByrefType, Name, ND);
5307 std::string ForwardingCastType("(");
5308 ForwardingCastType += ByrefType + " *)";
5309 ByrefType += " " + Name + " = {(void*)";
5310 ByrefType += utostr(isa);
5311 ByrefType += "," + ForwardingCastType + "&" + Name + ", ";
5312 ByrefType += utostr(flags);
5313 ByrefType += ", ";
5314 ByrefType += "sizeof(";
5315 RewriteByRefString(ByrefType, Name, ND);
5316 ByrefType += ")";
5317 if (HasCopyAndDispose) {
5318 ByrefType += ", __Block_byref_id_object_copy_";
5319 ByrefType += utostr(flag);
5320 ByrefType += ", __Block_byref_id_object_dispose_";
5321 ByrefType += utostr(flag);
5322 }
5323
5324 if (!firstDecl) {
5325 // In multiple __block declarations, and for all but 1st declaration,
5326 // find location of the separating comma. This would be start location
5327 // where new text is to be inserted.
5328 DeclLoc = ND->getLocation();
5329 const char *startDeclBuf = SM->getCharacterData(DeclLoc);
5330 const char *commaBuf = startDeclBuf;
5331 while (*commaBuf != ',')
5332 commaBuf--;
5333 assert((*commaBuf == ',') && "RewriteByRefVar: can't find ','");
5334 DeclLoc = DeclLoc.getLocWithOffset(commaBuf - startDeclBuf);
5335 startBuf = commaBuf;
5336 }
5337
5338 if (!hasInit) {
5339 ByrefType += "};\n";
5340 unsigned nameSize = Name.size();
5341 // for block or function pointer declaration. Name is aleady
5342 // part of the declaration.
5343 if (Ty->isBlockPointerType() || Ty->isFunctionPointerType())
5344 nameSize = 1;
5345 ReplaceText(DeclLoc, endBuf-startBuf+nameSize, ByrefType);
5346 }
5347 else {
5348 ByrefType += ", ";
5349 SourceLocation startLoc;
5350 Expr *E = ND->getInit();
5351 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
5352 startLoc = ECE->getLParenLoc();
5353 else
5354 startLoc = E->getLocStart();
5355 startLoc = SM->getExpansionLoc(startLoc);
5356 endBuf = SM->getCharacterData(startLoc);
5357 ReplaceText(DeclLoc, endBuf-startBuf, ByrefType);
5358
5359 const char separator = lastDecl ? ';' : ',';
5360 const char *startInitializerBuf = SM->getCharacterData(startLoc);
5361 const char *separatorBuf = strchr(startInitializerBuf, separator);
5362 assert((*separatorBuf == separator) &&
5363 "RewriteByRefVar: can't find ';' or ','");
5364 SourceLocation separatorLoc =
5365 startLoc.getLocWithOffset(separatorBuf-startInitializerBuf);
5366
5367 InsertText(separatorLoc, lastDecl ? "}" : "};\n");
5368 }
5369 return;
5370 }
5371
CollectBlockDeclRefInfo(BlockExpr * Exp)5372 void RewriteModernObjC::CollectBlockDeclRefInfo(BlockExpr *Exp) {
5373 // Add initializers for any closure decl refs.
5374 GetBlockDeclRefExprs(Exp->getBody());
5375 if (BlockDeclRefs.size()) {
5376 // Unique all "by copy" declarations.
5377 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5378 if (!BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
5379 if (!BlockByCopyDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
5380 BlockByCopyDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
5381 BlockByCopyDecls.push_back(BlockDeclRefs[i]->getDecl());
5382 }
5383 }
5384 // Unique all "by ref" declarations.
5385 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5386 if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
5387 if (!BlockByRefDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
5388 BlockByRefDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
5389 BlockByRefDecls.push_back(BlockDeclRefs[i]->getDecl());
5390 }
5391 }
5392 // Find any imported blocks...they will need special attention.
5393 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5394 if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
5395 BlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
5396 BlockDeclRefs[i]->getType()->isBlockPointerType())
5397 ImportedBlockDecls.insert(BlockDeclRefs[i]->getDecl());
5398 }
5399 }
5400
SynthBlockInitFunctionDecl(StringRef name)5401 FunctionDecl *RewriteModernObjC::SynthBlockInitFunctionDecl(StringRef name) {
5402 IdentifierInfo *ID = &Context->Idents.get(name);
5403 QualType FType = Context->getFunctionNoProtoType(Context->VoidPtrTy);
5404 return FunctionDecl::Create(*Context, TUDecl, SourceLocation(),
5405 SourceLocation(), ID, FType, 0, SC_Extern,
5406 false, false);
5407 }
5408
SynthBlockInitExpr(BlockExpr * Exp,const SmallVectorImpl<DeclRefExpr * > & InnerBlockDeclRefs)5409 Stmt *RewriteModernObjC::SynthBlockInitExpr(BlockExpr *Exp,
5410 const SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs) {
5411
5412 const BlockDecl *block = Exp->getBlockDecl();
5413
5414 Blocks.push_back(Exp);
5415
5416 CollectBlockDeclRefInfo(Exp);
5417
5418 // Add inner imported variables now used in current block.
5419 int countOfInnerDecls = 0;
5420 if (!InnerBlockDeclRefs.empty()) {
5421 for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++) {
5422 DeclRefExpr *Exp = InnerBlockDeclRefs[i];
5423 ValueDecl *VD = Exp->getDecl();
5424 if (!VD->hasAttr<BlocksAttr>() && !BlockByCopyDeclsPtrSet.count(VD)) {
5425 // We need to save the copied-in variables in nested
5426 // blocks because it is needed at the end for some of the API generations.
5427 // See SynthesizeBlockLiterals routine.
5428 InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
5429 BlockDeclRefs.push_back(Exp);
5430 BlockByCopyDeclsPtrSet.insert(VD);
5431 BlockByCopyDecls.push_back(VD);
5432 }
5433 if (VD->hasAttr<BlocksAttr>() && !BlockByRefDeclsPtrSet.count(VD)) {
5434 InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
5435 BlockDeclRefs.push_back(Exp);
5436 BlockByRefDeclsPtrSet.insert(VD);
5437 BlockByRefDecls.push_back(VD);
5438 }
5439 }
5440 // Find any imported blocks...they will need special attention.
5441 for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++)
5442 if (InnerBlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
5443 InnerBlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
5444 InnerBlockDeclRefs[i]->getType()->isBlockPointerType())
5445 ImportedBlockDecls.insert(InnerBlockDeclRefs[i]->getDecl());
5446 }
5447 InnerDeclRefsCount.push_back(countOfInnerDecls);
5448
5449 std::string FuncName;
5450
5451 if (CurFunctionDef)
5452 FuncName = CurFunctionDef->getNameAsString();
5453 else if (CurMethodDef)
5454 BuildUniqueMethodName(FuncName, CurMethodDef);
5455 else if (GlobalVarDecl)
5456 FuncName = std::string(GlobalVarDecl->getNameAsString());
5457
5458 bool GlobalBlockExpr =
5459 block->getDeclContext()->getRedeclContext()->isFileContext();
5460
5461 if (GlobalBlockExpr && !GlobalVarDecl) {
5462 Diags.Report(block->getLocation(), GlobalBlockRewriteFailedDiag);
5463 GlobalBlockExpr = false;
5464 }
5465
5466 std::string BlockNumber = utostr(Blocks.size()-1);
5467
5468 std::string Func = "__" + FuncName + "_block_func_" + BlockNumber;
5469
5470 // Get a pointer to the function type so we can cast appropriately.
5471 QualType BFT = convertFunctionTypeOfBlocks(Exp->getFunctionType());
5472 QualType FType = Context->getPointerType(BFT);
5473
5474 FunctionDecl *FD;
5475 Expr *NewRep;
5476
5477 // Simulate a contructor call...
5478 std::string Tag;
5479
5480 if (GlobalBlockExpr)
5481 Tag = "__global_";
5482 else
5483 Tag = "__";
5484 Tag += FuncName + "_block_impl_" + BlockNumber;
5485
5486 FD = SynthBlockInitFunctionDecl(Tag);
5487 DeclRefExpr *DRE = new (Context) DeclRefExpr(FD, false, FType, VK_RValue,
5488 SourceLocation());
5489
5490 SmallVector<Expr*, 4> InitExprs;
5491
5492 // Initialize the block function.
5493 FD = SynthBlockInitFunctionDecl(Func);
5494 DeclRefExpr *Arg = new (Context) DeclRefExpr(FD, false, FD->getType(),
5495 VK_LValue, SourceLocation());
5496 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy,
5497 CK_BitCast, Arg);
5498 InitExprs.push_back(castExpr);
5499
5500 // Initialize the block descriptor.
5501 std::string DescData = "__" + FuncName + "_block_desc_" + BlockNumber + "_DATA";
5502
5503 VarDecl *NewVD = VarDecl::Create(*Context, TUDecl,
5504 SourceLocation(), SourceLocation(),
5505 &Context->Idents.get(DescData.c_str()),
5506 Context->VoidPtrTy, 0,
5507 SC_Static);
5508 UnaryOperator *DescRefExpr =
5509 new (Context) UnaryOperator(new (Context) DeclRefExpr(NewVD, false,
5510 Context->VoidPtrTy,
5511 VK_LValue,
5512 SourceLocation()),
5513 UO_AddrOf,
5514 Context->getPointerType(Context->VoidPtrTy),
5515 VK_RValue, OK_Ordinary,
5516 SourceLocation());
5517 InitExprs.push_back(DescRefExpr);
5518
5519 // Add initializers for any closure decl refs.
5520 if (BlockDeclRefs.size()) {
5521 Expr *Exp;
5522 // Output all "by copy" declarations.
5523 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
5524 E = BlockByCopyDecls.end(); I != E; ++I) {
5525 if (isObjCType((*I)->getType())) {
5526 // FIXME: Conform to ABI ([[obj retain] autorelease]).
5527 FD = SynthBlockInitFunctionDecl((*I)->getName());
5528 Exp = new (Context) DeclRefExpr(FD, false, FD->getType(),
5529 VK_LValue, SourceLocation());
5530 if (HasLocalVariableExternalStorage(*I)) {
5531 QualType QT = (*I)->getType();
5532 QT = Context->getPointerType(QT);
5533 Exp = new (Context) UnaryOperator(Exp, UO_AddrOf, QT, VK_RValue,
5534 OK_Ordinary, SourceLocation());
5535 }
5536 } else if (isTopLevelBlockPointerType((*I)->getType())) {
5537 FD = SynthBlockInitFunctionDecl((*I)->getName());
5538 Arg = new (Context) DeclRefExpr(FD, false, FD->getType(),
5539 VK_LValue, SourceLocation());
5540 Exp = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy,
5541 CK_BitCast, Arg);
5542 } else {
5543 FD = SynthBlockInitFunctionDecl((*I)->getName());
5544 Exp = new (Context) DeclRefExpr(FD, false, FD->getType(),
5545 VK_LValue, SourceLocation());
5546 if (HasLocalVariableExternalStorage(*I)) {
5547 QualType QT = (*I)->getType();
5548 QT = Context->getPointerType(QT);
5549 Exp = new (Context) UnaryOperator(Exp, UO_AddrOf, QT, VK_RValue,
5550 OK_Ordinary, SourceLocation());
5551 }
5552
5553 }
5554 InitExprs.push_back(Exp);
5555 }
5556 // Output all "by ref" declarations.
5557 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
5558 E = BlockByRefDecls.end(); I != E; ++I) {
5559 ValueDecl *ND = (*I);
5560 std::string Name(ND->getNameAsString());
5561 std::string RecName;
5562 RewriteByRefString(RecName, Name, ND, true);
5563 IdentifierInfo *II = &Context->Idents.get(RecName.c_str()
5564 + sizeof("struct"));
5565 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
5566 SourceLocation(), SourceLocation(),
5567 II);
5568 assert(RD && "SynthBlockInitExpr(): Can't find RecordDecl");
5569 QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
5570
5571 FD = SynthBlockInitFunctionDecl((*I)->getName());
5572 Exp = new (Context) DeclRefExpr(FD, false, FD->getType(), VK_LValue,
5573 SourceLocation());
5574 bool isNestedCapturedVar = false;
5575 if (block)
5576 for (BlockDecl::capture_const_iterator ci = block->capture_begin(),
5577 ce = block->capture_end(); ci != ce; ++ci) {
5578 const VarDecl *variable = ci->getVariable();
5579 if (variable == ND && ci->isNested()) {
5580 assert (ci->isByRef() &&
5581 "SynthBlockInitExpr - captured block variable is not byref");
5582 isNestedCapturedVar = true;
5583 break;
5584 }
5585 }
5586 // captured nested byref variable has its address passed. Do not take
5587 // its address again.
5588 if (!isNestedCapturedVar)
5589 Exp = new (Context) UnaryOperator(Exp, UO_AddrOf,
5590 Context->getPointerType(Exp->getType()),
5591 VK_RValue, OK_Ordinary, SourceLocation());
5592 Exp = NoTypeInfoCStyleCastExpr(Context, castT, CK_BitCast, Exp);
5593 InitExprs.push_back(Exp);
5594 }
5595 }
5596 if (ImportedBlockDecls.size()) {
5597 // generate BLOCK_HAS_COPY_DISPOSE(have helper funcs) | BLOCK_HAS_DESCRIPTOR
5598 int flag = (BLOCK_HAS_COPY_DISPOSE | BLOCK_HAS_DESCRIPTOR);
5599 unsigned IntSize =
5600 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
5601 Expr *FlagExp = IntegerLiteral::Create(*Context, llvm::APInt(IntSize, flag),
5602 Context->IntTy, SourceLocation());
5603 InitExprs.push_back(FlagExp);
5604 }
5605 NewRep = new (Context) CallExpr(*Context, DRE, InitExprs,
5606 FType, VK_LValue, SourceLocation());
5607
5608 if (GlobalBlockExpr) {
5609 assert (GlobalConstructionExp == 0 &&
5610 "SynthBlockInitExpr - GlobalConstructionExp must be null");
5611 GlobalConstructionExp = NewRep;
5612 NewRep = DRE;
5613 }
5614
5615 NewRep = new (Context) UnaryOperator(NewRep, UO_AddrOf,
5616 Context->getPointerType(NewRep->getType()),
5617 VK_RValue, OK_Ordinary, SourceLocation());
5618 NewRep = NoTypeInfoCStyleCastExpr(Context, FType, CK_BitCast,
5619 NewRep);
5620 BlockDeclRefs.clear();
5621 BlockByRefDecls.clear();
5622 BlockByRefDeclsPtrSet.clear();
5623 BlockByCopyDecls.clear();
5624 BlockByCopyDeclsPtrSet.clear();
5625 ImportedBlockDecls.clear();
5626 return NewRep;
5627 }
5628
IsDeclStmtInForeachHeader(DeclStmt * DS)5629 bool RewriteModernObjC::IsDeclStmtInForeachHeader(DeclStmt *DS) {
5630 if (const ObjCForCollectionStmt * CS =
5631 dyn_cast<ObjCForCollectionStmt>(Stmts.back()))
5632 return CS->getElement() == DS;
5633 return false;
5634 }
5635
5636 //===----------------------------------------------------------------------===//
5637 // Function Body / Expression rewriting
5638 //===----------------------------------------------------------------------===//
5639
RewriteFunctionBodyOrGlobalInitializer(Stmt * S)5640 Stmt *RewriteModernObjC::RewriteFunctionBodyOrGlobalInitializer(Stmt *S) {
5641 if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
5642 isa<DoStmt>(S) || isa<ForStmt>(S))
5643 Stmts.push_back(S);
5644 else if (isa<ObjCForCollectionStmt>(S)) {
5645 Stmts.push_back(S);
5646 ObjCBcLabelNo.push_back(++BcLabelCount);
5647 }
5648
5649 // Pseudo-object operations and ivar references need special
5650 // treatment because we're going to recursively rewrite them.
5651 if (PseudoObjectExpr *PseudoOp = dyn_cast<PseudoObjectExpr>(S)) {
5652 if (isa<BinaryOperator>(PseudoOp->getSyntacticForm())) {
5653 return RewritePropertyOrImplicitSetter(PseudoOp);
5654 } else {
5655 return RewritePropertyOrImplicitGetter(PseudoOp);
5656 }
5657 } else if (ObjCIvarRefExpr *IvarRefExpr = dyn_cast<ObjCIvarRefExpr>(S)) {
5658 return RewriteObjCIvarRefExpr(IvarRefExpr);
5659 }
5660 else if (isa<OpaqueValueExpr>(S))
5661 S = cast<OpaqueValueExpr>(S)->getSourceExpr();
5662
5663 SourceRange OrigStmtRange = S->getSourceRange();
5664
5665 // Perform a bottom up rewrite of all children.
5666 for (Stmt::child_range CI = S->children(); CI; ++CI)
5667 if (*CI) {
5668 Stmt *childStmt = (*CI);
5669 Stmt *newStmt = RewriteFunctionBodyOrGlobalInitializer(childStmt);
5670 if (newStmt) {
5671 *CI = newStmt;
5672 }
5673 }
5674
5675 if (BlockExpr *BE = dyn_cast<BlockExpr>(S)) {
5676 SmallVector<DeclRefExpr *, 8> InnerBlockDeclRefs;
5677 llvm::SmallPtrSet<const DeclContext *, 8> InnerContexts;
5678 InnerContexts.insert(BE->getBlockDecl());
5679 ImportedLocalExternalDecls.clear();
5680 GetInnerBlockDeclRefExprs(BE->getBody(),
5681 InnerBlockDeclRefs, InnerContexts);
5682 // Rewrite the block body in place.
5683 Stmt *SaveCurrentBody = CurrentBody;
5684 CurrentBody = BE->getBody();
5685 PropParentMap = 0;
5686 // block literal on rhs of a property-dot-sytax assignment
5687 // must be replaced by its synthesize ast so getRewrittenText
5688 // works as expected. In this case, what actually ends up on RHS
5689 // is the blockTranscribed which is the helper function for the
5690 // block literal; as in: self.c = ^() {[ace ARR];};
5691 bool saveDisableReplaceStmt = DisableReplaceStmt;
5692 DisableReplaceStmt = false;
5693 RewriteFunctionBodyOrGlobalInitializer(BE->getBody());
5694 DisableReplaceStmt = saveDisableReplaceStmt;
5695 CurrentBody = SaveCurrentBody;
5696 PropParentMap = 0;
5697 ImportedLocalExternalDecls.clear();
5698 // Now we snarf the rewritten text and stash it away for later use.
5699 std::string Str = Rewrite.getRewrittenText(BE->getSourceRange());
5700 RewrittenBlockExprs[BE] = Str;
5701
5702 Stmt *blockTranscribed = SynthBlockInitExpr(BE, InnerBlockDeclRefs);
5703
5704 //blockTranscribed->dump();
5705 ReplaceStmt(S, blockTranscribed);
5706 return blockTranscribed;
5707 }
5708 // Handle specific things.
5709 if (ObjCEncodeExpr *AtEncode = dyn_cast<ObjCEncodeExpr>(S))
5710 return RewriteAtEncode(AtEncode);
5711
5712 if (ObjCSelectorExpr *AtSelector = dyn_cast<ObjCSelectorExpr>(S))
5713 return RewriteAtSelector(AtSelector);
5714
5715 if (ObjCStringLiteral *AtString = dyn_cast<ObjCStringLiteral>(S))
5716 return RewriteObjCStringLiteral(AtString);
5717
5718 if (ObjCBoolLiteralExpr *BoolLitExpr = dyn_cast<ObjCBoolLiteralExpr>(S))
5719 return RewriteObjCBoolLiteralExpr(BoolLitExpr);
5720
5721 if (ObjCBoxedExpr *BoxedExpr = dyn_cast<ObjCBoxedExpr>(S))
5722 return RewriteObjCBoxedExpr(BoxedExpr);
5723
5724 if (ObjCArrayLiteral *ArrayLitExpr = dyn_cast<ObjCArrayLiteral>(S))
5725 return RewriteObjCArrayLiteralExpr(ArrayLitExpr);
5726
5727 if (ObjCDictionaryLiteral *DictionaryLitExpr =
5728 dyn_cast<ObjCDictionaryLiteral>(S))
5729 return RewriteObjCDictionaryLiteralExpr(DictionaryLitExpr);
5730
5731 if (ObjCMessageExpr *MessExpr = dyn_cast<ObjCMessageExpr>(S)) {
5732 #if 0
5733 // Before we rewrite it, put the original message expression in a comment.
5734 SourceLocation startLoc = MessExpr->getLocStart();
5735 SourceLocation endLoc = MessExpr->getLocEnd();
5736
5737 const char *startBuf = SM->getCharacterData(startLoc);
5738 const char *endBuf = SM->getCharacterData(endLoc);
5739
5740 std::string messString;
5741 messString += "// ";
5742 messString.append(startBuf, endBuf-startBuf+1);
5743 messString += "\n";
5744
5745 // FIXME: Missing definition of
5746 // InsertText(clang::SourceLocation, char const*, unsigned int).
5747 // InsertText(startLoc, messString.c_str(), messString.size());
5748 // Tried this, but it didn't work either...
5749 // ReplaceText(startLoc, 0, messString.c_str(), messString.size());
5750 #endif
5751 return RewriteMessageExpr(MessExpr);
5752 }
5753
5754 if (ObjCAutoreleasePoolStmt *StmtAutoRelease =
5755 dyn_cast<ObjCAutoreleasePoolStmt>(S)) {
5756 return RewriteObjCAutoreleasePoolStmt(StmtAutoRelease);
5757 }
5758
5759 if (ObjCAtTryStmt *StmtTry = dyn_cast<ObjCAtTryStmt>(S))
5760 return RewriteObjCTryStmt(StmtTry);
5761
5762 if (ObjCAtSynchronizedStmt *StmtTry = dyn_cast<ObjCAtSynchronizedStmt>(S))
5763 return RewriteObjCSynchronizedStmt(StmtTry);
5764
5765 if (ObjCAtThrowStmt *StmtThrow = dyn_cast<ObjCAtThrowStmt>(S))
5766 return RewriteObjCThrowStmt(StmtThrow);
5767
5768 if (ObjCProtocolExpr *ProtocolExp = dyn_cast<ObjCProtocolExpr>(S))
5769 return RewriteObjCProtocolExpr(ProtocolExp);
5770
5771 if (ObjCForCollectionStmt *StmtForCollection =
5772 dyn_cast<ObjCForCollectionStmt>(S))
5773 return RewriteObjCForCollectionStmt(StmtForCollection,
5774 OrigStmtRange.getEnd());
5775 if (BreakStmt *StmtBreakStmt =
5776 dyn_cast<BreakStmt>(S))
5777 return RewriteBreakStmt(StmtBreakStmt);
5778 if (ContinueStmt *StmtContinueStmt =
5779 dyn_cast<ContinueStmt>(S))
5780 return RewriteContinueStmt(StmtContinueStmt);
5781
5782 // Need to check for protocol refs (id <P>, Foo <P> *) in variable decls
5783 // and cast exprs.
5784 if (DeclStmt *DS = dyn_cast<DeclStmt>(S)) {
5785 // FIXME: What we're doing here is modifying the type-specifier that
5786 // precedes the first Decl. In the future the DeclGroup should have
5787 // a separate type-specifier that we can rewrite.
5788 // NOTE: We need to avoid rewriting the DeclStmt if it is within
5789 // the context of an ObjCForCollectionStmt. For example:
5790 // NSArray *someArray;
5791 // for (id <FooProtocol> index in someArray) ;
5792 // This is because RewriteObjCForCollectionStmt() does textual rewriting
5793 // and it depends on the original text locations/positions.
5794 if (Stmts.empty() || !IsDeclStmtInForeachHeader(DS))
5795 RewriteObjCQualifiedInterfaceTypes(*DS->decl_begin());
5796
5797 // Blocks rewrite rules.
5798 for (DeclStmt::decl_iterator DI = DS->decl_begin(), DE = DS->decl_end();
5799 DI != DE; ++DI) {
5800 Decl *SD = *DI;
5801 if (ValueDecl *ND = dyn_cast<ValueDecl>(SD)) {
5802 if (isTopLevelBlockPointerType(ND->getType()))
5803 RewriteBlockPointerDecl(ND);
5804 else if (ND->getType()->isFunctionPointerType())
5805 CheckFunctionPointerDecl(ND->getType(), ND);
5806 if (VarDecl *VD = dyn_cast<VarDecl>(SD)) {
5807 if (VD->hasAttr<BlocksAttr>()) {
5808 static unsigned uniqueByrefDeclCount = 0;
5809 assert(!BlockByRefDeclNo.count(ND) &&
5810 "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl");
5811 BlockByRefDeclNo[ND] = uniqueByrefDeclCount++;
5812 RewriteByRefVar(VD, (DI == DS->decl_begin()), ((DI+1) == DE));
5813 }
5814 else
5815 RewriteTypeOfDecl(VD);
5816 }
5817 }
5818 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(SD)) {
5819 if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
5820 RewriteBlockPointerDecl(TD);
5821 else if (TD->getUnderlyingType()->isFunctionPointerType())
5822 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
5823 }
5824 }
5825 }
5826
5827 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S))
5828 RewriteObjCQualifiedInterfaceTypes(CE);
5829
5830 if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
5831 isa<DoStmt>(S) || isa<ForStmt>(S)) {
5832 assert(!Stmts.empty() && "Statement stack is empty");
5833 assert ((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) ||
5834 isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back()))
5835 && "Statement stack mismatch");
5836 Stmts.pop_back();
5837 }
5838 // Handle blocks rewriting.
5839 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
5840 ValueDecl *VD = DRE->getDecl();
5841 if (VD->hasAttr<BlocksAttr>())
5842 return RewriteBlockDeclRefExpr(DRE);
5843 if (HasLocalVariableExternalStorage(VD))
5844 return RewriteLocalVariableExternalStorage(DRE);
5845 }
5846
5847 if (CallExpr *CE = dyn_cast<CallExpr>(S)) {
5848 if (CE->getCallee()->getType()->isBlockPointerType()) {
5849 Stmt *BlockCall = SynthesizeBlockCall(CE, CE->getCallee());
5850 ReplaceStmt(S, BlockCall);
5851 return BlockCall;
5852 }
5853 }
5854 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S)) {
5855 RewriteCastExpr(CE);
5856 }
5857 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
5858 RewriteImplicitCastObjCExpr(ICE);
5859 }
5860 #if 0
5861
5862 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
5863 CastExpr *Replacement = new (Context) CastExpr(ICE->getType(),
5864 ICE->getSubExpr(),
5865 SourceLocation());
5866 // Get the new text.
5867 std::string SStr;
5868 llvm::raw_string_ostream Buf(SStr);
5869 Replacement->printPretty(Buf);
5870 const std::string &Str = Buf.str();
5871
5872 printf("CAST = %s\n", &Str[0]);
5873 InsertText(ICE->getSubExpr()->getLocStart(), &Str[0], Str.size());
5874 delete S;
5875 return Replacement;
5876 }
5877 #endif
5878 // Return this stmt unmodified.
5879 return S;
5880 }
5881
RewriteRecordBody(RecordDecl * RD)5882 void RewriteModernObjC::RewriteRecordBody(RecordDecl *RD) {
5883 for (RecordDecl::field_iterator i = RD->field_begin(),
5884 e = RD->field_end(); i != e; ++i) {
5885 FieldDecl *FD = *i;
5886 if (isTopLevelBlockPointerType(FD->getType()))
5887 RewriteBlockPointerDecl(FD);
5888 if (FD->getType()->isObjCQualifiedIdType() ||
5889 FD->getType()->isObjCQualifiedInterfaceType())
5890 RewriteObjCQualifiedInterfaceTypes(FD);
5891 }
5892 }
5893
5894 /// HandleDeclInMainFile - This is called for each top-level decl defined in the
5895 /// main file of the input.
HandleDeclInMainFile(Decl * D)5896 void RewriteModernObjC::HandleDeclInMainFile(Decl *D) {
5897 switch (D->getKind()) {
5898 case Decl::Function: {
5899 FunctionDecl *FD = cast<FunctionDecl>(D);
5900 if (FD->isOverloadedOperator())
5901 return;
5902
5903 // Since function prototypes don't have ParmDecl's, we check the function
5904 // prototype. This enables us to rewrite function declarations and
5905 // definitions using the same code.
5906 RewriteBlocksInFunctionProtoType(FD->getType(), FD);
5907
5908 if (!FD->isThisDeclarationADefinition())
5909 break;
5910
5911 // FIXME: If this should support Obj-C++, support CXXTryStmt
5912 if (CompoundStmt *Body = dyn_cast_or_null<CompoundStmt>(FD->getBody())) {
5913 CurFunctionDef = FD;
5914 CurrentBody = Body;
5915 Body =
5916 cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
5917 FD->setBody(Body);
5918 CurrentBody = 0;
5919 if (PropParentMap) {
5920 delete PropParentMap;
5921 PropParentMap = 0;
5922 }
5923 // This synthesizes and inserts the block "impl" struct, invoke function,
5924 // and any copy/dispose helper functions.
5925 InsertBlockLiteralsWithinFunction(FD);
5926 RewriteLineDirective(D);
5927 CurFunctionDef = 0;
5928 }
5929 break;
5930 }
5931 case Decl::ObjCMethod: {
5932 ObjCMethodDecl *MD = cast<ObjCMethodDecl>(D);
5933 if (CompoundStmt *Body = MD->getCompoundBody()) {
5934 CurMethodDef = MD;
5935 CurrentBody = Body;
5936 Body =
5937 cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
5938 MD->setBody(Body);
5939 CurrentBody = 0;
5940 if (PropParentMap) {
5941 delete PropParentMap;
5942 PropParentMap = 0;
5943 }
5944 InsertBlockLiteralsWithinMethod(MD);
5945 RewriteLineDirective(D);
5946 CurMethodDef = 0;
5947 }
5948 break;
5949 }
5950 case Decl::ObjCImplementation: {
5951 ObjCImplementationDecl *CI = cast<ObjCImplementationDecl>(D);
5952 ClassImplementation.push_back(CI);
5953 break;
5954 }
5955 case Decl::ObjCCategoryImpl: {
5956 ObjCCategoryImplDecl *CI = cast<ObjCCategoryImplDecl>(D);
5957 CategoryImplementation.push_back(CI);
5958 break;
5959 }
5960 case Decl::Var: {
5961 VarDecl *VD = cast<VarDecl>(D);
5962 RewriteObjCQualifiedInterfaceTypes(VD);
5963 if (isTopLevelBlockPointerType(VD->getType()))
5964 RewriteBlockPointerDecl(VD);
5965 else if (VD->getType()->isFunctionPointerType()) {
5966 CheckFunctionPointerDecl(VD->getType(), VD);
5967 if (VD->getInit()) {
5968 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
5969 RewriteCastExpr(CE);
5970 }
5971 }
5972 } else if (VD->getType()->isRecordType()) {
5973 RecordDecl *RD = VD->getType()->getAs<RecordType>()->getDecl();
5974 if (RD->isCompleteDefinition())
5975 RewriteRecordBody(RD);
5976 }
5977 if (VD->getInit()) {
5978 GlobalVarDecl = VD;
5979 CurrentBody = VD->getInit();
5980 RewriteFunctionBodyOrGlobalInitializer(VD->getInit());
5981 CurrentBody = 0;
5982 if (PropParentMap) {
5983 delete PropParentMap;
5984 PropParentMap = 0;
5985 }
5986 SynthesizeBlockLiterals(VD->getTypeSpecStartLoc(), VD->getName());
5987 GlobalVarDecl = 0;
5988
5989 // This is needed for blocks.
5990 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
5991 RewriteCastExpr(CE);
5992 }
5993 }
5994 break;
5995 }
5996 case Decl::TypeAlias:
5997 case Decl::Typedef: {
5998 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(D)) {
5999 if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
6000 RewriteBlockPointerDecl(TD);
6001 else if (TD->getUnderlyingType()->isFunctionPointerType())
6002 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
6003 else
6004 RewriteObjCQualifiedInterfaceTypes(TD);
6005 }
6006 break;
6007 }
6008 case Decl::CXXRecord:
6009 case Decl::Record: {
6010 RecordDecl *RD = cast<RecordDecl>(D);
6011 if (RD->isCompleteDefinition())
6012 RewriteRecordBody(RD);
6013 break;
6014 }
6015 default:
6016 break;
6017 }
6018 // Nothing yet.
6019 }
6020
6021 /// Write_ProtocolExprReferencedMetadata - This routine writer out the
6022 /// protocol reference symbols in the for of:
6023 /// struct _protocol_t *PROTOCOL_REF = &PROTOCOL_METADATA.
Write_ProtocolExprReferencedMetadata(ASTContext * Context,ObjCProtocolDecl * PDecl,std::string & Result)6024 static void Write_ProtocolExprReferencedMetadata(ASTContext *Context,
6025 ObjCProtocolDecl *PDecl,
6026 std::string &Result) {
6027 // Also output .objc_protorefs$B section and its meta-data.
6028 if (Context->getLangOpts().MicrosoftExt)
6029 Result += "static ";
6030 Result += "struct _protocol_t *";
6031 Result += "_OBJC_PROTOCOL_REFERENCE_$_";
6032 Result += PDecl->getNameAsString();
6033 Result += " = &";
6034 Result += "_OBJC_PROTOCOL_"; Result += PDecl->getNameAsString();
6035 Result += ";\n";
6036 }
6037
HandleTranslationUnit(ASTContext & C)6038 void RewriteModernObjC::HandleTranslationUnit(ASTContext &C) {
6039 if (Diags.hasErrorOccurred())
6040 return;
6041
6042 RewriteInclude();
6043
6044 for (unsigned i = 0, e = FunctionDefinitionsSeen.size(); i < e; i++) {
6045 // translation of function bodies were postponed untill all class and
6046 // their extensions and implementations are seen. This is because, we
6047 // cannot build grouping structs for bitfields untill they are all seen.
6048 FunctionDecl *FDecl = FunctionDefinitionsSeen[i];
6049 HandleTopLevelSingleDecl(FDecl);
6050 }
6051
6052 // Here's a great place to add any extra declarations that may be needed.
6053 // Write out meta data for each @protocol(<expr>).
6054 for (llvm::SmallPtrSet<ObjCProtocolDecl *,8>::iterator I = ProtocolExprDecls.begin(),
6055 E = ProtocolExprDecls.end(); I != E; ++I) {
6056 RewriteObjCProtocolMetaData(*I, Preamble);
6057 Write_ProtocolExprReferencedMetadata(Context, (*I), Preamble);
6058 }
6059
6060 InsertText(SM->getLocForStartOfFile(MainFileID), Preamble, false);
6061
6062 if (ClassImplementation.size() || CategoryImplementation.size())
6063 RewriteImplementations();
6064
6065 for (unsigned i = 0, e = ObjCInterfacesSeen.size(); i < e; i++) {
6066 ObjCInterfaceDecl *CDecl = ObjCInterfacesSeen[i];
6067 // Write struct declaration for the class matching its ivar declarations.
6068 // Note that for modern abi, this is postponed until the end of TU
6069 // because class extensions and the implementation might declare their own
6070 // private ivars.
6071 RewriteInterfaceDecl(CDecl);
6072 }
6073
6074 // Get the buffer corresponding to MainFileID. If we haven't changed it, then
6075 // we are done.
6076 if (const RewriteBuffer *RewriteBuf =
6077 Rewrite.getRewriteBufferFor(MainFileID)) {
6078 //printf("Changed:\n");
6079 *OutFile << std::string(RewriteBuf->begin(), RewriteBuf->end());
6080 } else {
6081 llvm::errs() << "No changes\n";
6082 }
6083
6084 if (ClassImplementation.size() || CategoryImplementation.size() ||
6085 ProtocolExprDecls.size()) {
6086 // Rewrite Objective-c meta data*
6087 std::string ResultStr;
6088 RewriteMetaDataIntoBuffer(ResultStr);
6089 // Emit metadata.
6090 *OutFile << ResultStr;
6091 }
6092 // Emit ImageInfo;
6093 {
6094 std::string ResultStr;
6095 WriteImageInfo(ResultStr);
6096 *OutFile << ResultStr;
6097 }
6098 OutFile->flush();
6099 }
6100
Initialize(ASTContext & context)6101 void RewriteModernObjC::Initialize(ASTContext &context) {
6102 InitializeCommon(context);
6103
6104 Preamble += "#ifndef __OBJC2__\n";
6105 Preamble += "#define __OBJC2__\n";
6106 Preamble += "#endif\n";
6107
6108 // declaring objc_selector outside the parameter list removes a silly
6109 // scope related warning...
6110 if (IsHeader)
6111 Preamble = "#pragma once\n";
6112 Preamble += "struct objc_selector; struct objc_class;\n";
6113 Preamble += "struct __rw_objc_super { \n\tstruct objc_object *object; ";
6114 Preamble += "\n\tstruct objc_object *superClass; ";
6115 // Add a constructor for creating temporary objects.
6116 Preamble += "\n\t__rw_objc_super(struct objc_object *o, struct objc_object *s) ";
6117 Preamble += ": object(o), superClass(s) {} ";
6118 Preamble += "\n};\n";
6119
6120 if (LangOpts.MicrosoftExt) {
6121 // Define all sections using syntax that makes sense.
6122 // These are currently generated.
6123 Preamble += "\n#pragma section(\".objc_classlist$B\", long, read, write)\n";
6124 Preamble += "#pragma section(\".objc_catlist$B\", long, read, write)\n";
6125 Preamble += "#pragma section(\".objc_imageinfo$B\", long, read, write)\n";
6126 Preamble += "#pragma section(\".objc_nlclslist$B\", long, read, write)\n";
6127 Preamble += "#pragma section(\".objc_nlcatlist$B\", long, read, write)\n";
6128 // These are generated but not necessary for functionality.
6129 Preamble += "#pragma section(\".cat_cls_meth$B\", long, read, write)\n";
6130 Preamble += "#pragma section(\".inst_meth$B\", long, read, write)\n";
6131 Preamble += "#pragma section(\".cls_meth$B\", long, read, write)\n";
6132 Preamble += "#pragma section(\".objc_ivar$B\", long, read, write)\n";
6133
6134 // These need be generated for performance. Currently they are not,
6135 // using API calls instead.
6136 Preamble += "#pragma section(\".objc_selrefs$B\", long, read, write)\n";
6137 Preamble += "#pragma section(\".objc_classrefs$B\", long, read, write)\n";
6138 Preamble += "#pragma section(\".objc_superrefs$B\", long, read, write)\n";
6139
6140 }
6141 Preamble += "#ifndef _REWRITER_typedef_Protocol\n";
6142 Preamble += "typedef struct objc_object Protocol;\n";
6143 Preamble += "#define _REWRITER_typedef_Protocol\n";
6144 Preamble += "#endif\n";
6145 if (LangOpts.MicrosoftExt) {
6146 Preamble += "#define __OBJC_RW_DLLIMPORT extern \"C\" __declspec(dllimport)\n";
6147 Preamble += "#define __OBJC_RW_STATICIMPORT extern \"C\"\n";
6148 }
6149 else
6150 Preamble += "#define __OBJC_RW_DLLIMPORT extern\n";
6151
6152 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend(void);\n";
6153 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSendSuper(void);\n";
6154 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend_stret(void);\n";
6155 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSendSuper_stret(void);\n";
6156 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend_fpret(void);\n";
6157
6158 Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *objc_getClass";
6159 Preamble += "(const char *);\n";
6160 Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *class_getSuperclass";
6161 Preamble += "(struct objc_class *);\n";
6162 Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *objc_getMetaClass";
6163 Preamble += "(const char *);\n";
6164 Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_throw( struct objc_object *);\n";
6165 // @synchronized hooks.
6166 Preamble += "__OBJC_RW_DLLIMPORT int objc_sync_enter( struct objc_object *);\n";
6167 Preamble += "__OBJC_RW_DLLIMPORT int objc_sync_exit( struct objc_object *);\n";
6168 Preamble += "__OBJC_RW_DLLIMPORT Protocol *objc_getProtocol(const char *);\n";
6169 Preamble += "#ifndef __FASTENUMERATIONSTATE\n";
6170 Preamble += "struct __objcFastEnumerationState {\n\t";
6171 Preamble += "unsigned long state;\n\t";
6172 Preamble += "void **itemsPtr;\n\t";
6173 Preamble += "unsigned long *mutationsPtr;\n\t";
6174 Preamble += "unsigned long extra[5];\n};\n";
6175 Preamble += "__OBJC_RW_DLLIMPORT void objc_enumerationMutation(struct objc_object *);\n";
6176 Preamble += "#define __FASTENUMERATIONSTATE\n";
6177 Preamble += "#endif\n";
6178 Preamble += "#ifndef __NSCONSTANTSTRINGIMPL\n";
6179 Preamble += "struct __NSConstantStringImpl {\n";
6180 Preamble += " int *isa;\n";
6181 Preamble += " int flags;\n";
6182 Preamble += " char *str;\n";
6183 Preamble += " long length;\n";
6184 Preamble += "};\n";
6185 Preamble += "#ifdef CF_EXPORT_CONSTANT_STRING\n";
6186 Preamble += "extern \"C\" __declspec(dllexport) int __CFConstantStringClassReference[];\n";
6187 Preamble += "#else\n";
6188 Preamble += "__OBJC_RW_DLLIMPORT int __CFConstantStringClassReference[];\n";
6189 Preamble += "#endif\n";
6190 Preamble += "#define __NSCONSTANTSTRINGIMPL\n";
6191 Preamble += "#endif\n";
6192 // Blocks preamble.
6193 Preamble += "#ifndef BLOCK_IMPL\n";
6194 Preamble += "#define BLOCK_IMPL\n";
6195 Preamble += "struct __block_impl {\n";
6196 Preamble += " void *isa;\n";
6197 Preamble += " int Flags;\n";
6198 Preamble += " int Reserved;\n";
6199 Preamble += " void *FuncPtr;\n";
6200 Preamble += "};\n";
6201 Preamble += "// Runtime copy/destroy helper functions (from Block_private.h)\n";
6202 Preamble += "#ifdef __OBJC_EXPORT_BLOCKS\n";
6203 Preamble += "extern \"C\" __declspec(dllexport) "
6204 "void _Block_object_assign(void *, const void *, const int);\n";
6205 Preamble += "extern \"C\" __declspec(dllexport) void _Block_object_dispose(const void *, const int);\n";
6206 Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteGlobalBlock[32];\n";
6207 Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteStackBlock[32];\n";
6208 Preamble += "#else\n";
6209 Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_assign(void *, const void *, const int);\n";
6210 Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_dispose(const void *, const int);\n";
6211 Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteGlobalBlock[32];\n";
6212 Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteStackBlock[32];\n";
6213 Preamble += "#endif\n";
6214 Preamble += "#endif\n";
6215 if (LangOpts.MicrosoftExt) {
6216 Preamble += "#undef __OBJC_RW_DLLIMPORT\n";
6217 Preamble += "#undef __OBJC_RW_STATICIMPORT\n";
6218 Preamble += "#ifndef KEEP_ATTRIBUTES\n"; // We use this for clang tests.
6219 Preamble += "#define __attribute__(X)\n";
6220 Preamble += "#endif\n";
6221 Preamble += "#ifndef __weak\n";
6222 Preamble += "#define __weak\n";
6223 Preamble += "#endif\n";
6224 Preamble += "#ifndef __block\n";
6225 Preamble += "#define __block\n";
6226 Preamble += "#endif\n";
6227 }
6228 else {
6229 Preamble += "#define __block\n";
6230 Preamble += "#define __weak\n";
6231 }
6232
6233 // Declarations required for modern objective-c array and dictionary literals.
6234 Preamble += "\n#include <stdarg.h>\n";
6235 Preamble += "struct __NSContainer_literal {\n";
6236 Preamble += " void * *arr;\n";
6237 Preamble += " __NSContainer_literal (unsigned int count, ...) {\n";
6238 Preamble += "\tva_list marker;\n";
6239 Preamble += "\tva_start(marker, count);\n";
6240 Preamble += "\tarr = new void *[count];\n";
6241 Preamble += "\tfor (unsigned i = 0; i < count; i++)\n";
6242 Preamble += "\t arr[i] = va_arg(marker, void *);\n";
6243 Preamble += "\tva_end( marker );\n";
6244 Preamble += " };\n";
6245 Preamble += " ~__NSContainer_literal() {\n";
6246 Preamble += "\tdelete[] arr;\n";
6247 Preamble += " }\n";
6248 Preamble += "};\n";
6249
6250 // Declaration required for implementation of @autoreleasepool statement.
6251 Preamble += "extern \"C\" __declspec(dllimport) void * objc_autoreleasePoolPush(void);\n";
6252 Preamble += "extern \"C\" __declspec(dllimport) void objc_autoreleasePoolPop(void *);\n\n";
6253 Preamble += "struct __AtAutoreleasePool {\n";
6254 Preamble += " __AtAutoreleasePool() {atautoreleasepoolobj = objc_autoreleasePoolPush();}\n";
6255 Preamble += " ~__AtAutoreleasePool() {objc_autoreleasePoolPop(atautoreleasepoolobj);}\n";
6256 Preamble += " void * atautoreleasepoolobj;\n";
6257 Preamble += "};\n";
6258
6259 // NOTE! Windows uses LLP64 for 64bit mode. So, cast pointer to long long
6260 // as this avoids warning in any 64bit/32bit compilation model.
6261 Preamble += "\n#define __OFFSETOFIVAR__(TYPE, MEMBER) ((long long) &((TYPE *)0)->MEMBER)\n";
6262 }
6263
6264 /// RewriteIvarOffsetComputation - This rutine synthesizes computation of
6265 /// ivar offset.
RewriteIvarOffsetComputation(ObjCIvarDecl * ivar,std::string & Result)6266 void RewriteModernObjC::RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
6267 std::string &Result) {
6268 Result += "__OFFSETOFIVAR__(struct ";
6269 Result += ivar->getContainingInterface()->getNameAsString();
6270 if (LangOpts.MicrosoftExt)
6271 Result += "_IMPL";
6272 Result += ", ";
6273 if (ivar->isBitField())
6274 ObjCIvarBitfieldGroupDecl(ivar, Result);
6275 else
6276 Result += ivar->getNameAsString();
6277 Result += ")";
6278 }
6279
6280 /// WriteModernMetadataDeclarations - Writes out metadata declarations for modern ABI.
6281 /// struct _prop_t {
6282 /// const char *name;
6283 /// char *attributes;
6284 /// }
6285
6286 /// struct _prop_list_t {
6287 /// uint32_t entsize; // sizeof(struct _prop_t)
6288 /// uint32_t count_of_properties;
6289 /// struct _prop_t prop_list[count_of_properties];
6290 /// }
6291
6292 /// struct _protocol_t;
6293
6294 /// struct _protocol_list_t {
6295 /// long protocol_count; // Note, this is 32/64 bit
6296 /// struct _protocol_t * protocol_list[protocol_count];
6297 /// }
6298
6299 /// struct _objc_method {
6300 /// SEL _cmd;
6301 /// const char *method_type;
6302 /// char *_imp;
6303 /// }
6304
6305 /// struct _method_list_t {
6306 /// uint32_t entsize; // sizeof(struct _objc_method)
6307 /// uint32_t method_count;
6308 /// struct _objc_method method_list[method_count];
6309 /// }
6310
6311 /// struct _protocol_t {
6312 /// id isa; // NULL
6313 /// const char *protocol_name;
6314 /// const struct _protocol_list_t * protocol_list; // super protocols
6315 /// const struct method_list_t *instance_methods;
6316 /// const struct method_list_t *class_methods;
6317 /// const struct method_list_t *optionalInstanceMethods;
6318 /// const struct method_list_t *optionalClassMethods;
6319 /// const struct _prop_list_t * properties;
6320 /// const uint32_t size; // sizeof(struct _protocol_t)
6321 /// const uint32_t flags; // = 0
6322 /// const char ** extendedMethodTypes;
6323 /// }
6324
6325 /// struct _ivar_t {
6326 /// unsigned long int *offset; // pointer to ivar offset location
6327 /// const char *name;
6328 /// const char *type;
6329 /// uint32_t alignment;
6330 /// uint32_t size;
6331 /// }
6332
6333 /// struct _ivar_list_t {
6334 /// uint32 entsize; // sizeof(struct _ivar_t)
6335 /// uint32 count;
6336 /// struct _ivar_t list[count];
6337 /// }
6338
6339 /// struct _class_ro_t {
6340 /// uint32_t flags;
6341 /// uint32_t instanceStart;
6342 /// uint32_t instanceSize;
6343 /// uint32_t reserved; // only when building for 64bit targets
6344 /// const uint8_t *ivarLayout;
6345 /// const char *name;
6346 /// const struct _method_list_t *baseMethods;
6347 /// const struct _protocol_list_t *baseProtocols;
6348 /// const struct _ivar_list_t *ivars;
6349 /// const uint8_t *weakIvarLayout;
6350 /// const struct _prop_list_t *properties;
6351 /// }
6352
6353 /// struct _class_t {
6354 /// struct _class_t *isa;
6355 /// struct _class_t *superclass;
6356 /// void *cache;
6357 /// IMP *vtable;
6358 /// struct _class_ro_t *ro;
6359 /// }
6360
6361 /// struct _category_t {
6362 /// const char *name;
6363 /// struct _class_t *cls;
6364 /// const struct _method_list_t *instance_methods;
6365 /// const struct _method_list_t *class_methods;
6366 /// const struct _protocol_list_t *protocols;
6367 /// const struct _prop_list_t *properties;
6368 /// }
6369
6370 /// MessageRefTy - LLVM for:
6371 /// struct _message_ref_t {
6372 /// IMP messenger;
6373 /// SEL name;
6374 /// };
6375
6376 /// SuperMessageRefTy - LLVM for:
6377 /// struct _super_message_ref_t {
6378 /// SUPER_IMP messenger;
6379 /// SEL name;
6380 /// };
6381
WriteModernMetadataDeclarations(ASTContext * Context,std::string & Result)6382 static void WriteModernMetadataDeclarations(ASTContext *Context, std::string &Result) {
6383 static bool meta_data_declared = false;
6384 if (meta_data_declared)
6385 return;
6386
6387 Result += "\nstruct _prop_t {\n";
6388 Result += "\tconst char *name;\n";
6389 Result += "\tconst char *attributes;\n";
6390 Result += "};\n";
6391
6392 Result += "\nstruct _protocol_t;\n";
6393
6394 Result += "\nstruct _objc_method {\n";
6395 Result += "\tstruct objc_selector * _cmd;\n";
6396 Result += "\tconst char *method_type;\n";
6397 Result += "\tvoid *_imp;\n";
6398 Result += "};\n";
6399
6400 Result += "\nstruct _protocol_t {\n";
6401 Result += "\tvoid * isa; // NULL\n";
6402 Result += "\tconst char *protocol_name;\n";
6403 Result += "\tconst struct _protocol_list_t * protocol_list; // super protocols\n";
6404 Result += "\tconst struct method_list_t *instance_methods;\n";
6405 Result += "\tconst struct method_list_t *class_methods;\n";
6406 Result += "\tconst struct method_list_t *optionalInstanceMethods;\n";
6407 Result += "\tconst struct method_list_t *optionalClassMethods;\n";
6408 Result += "\tconst struct _prop_list_t * properties;\n";
6409 Result += "\tconst unsigned int size; // sizeof(struct _protocol_t)\n";
6410 Result += "\tconst unsigned int flags; // = 0\n";
6411 Result += "\tconst char ** extendedMethodTypes;\n";
6412 Result += "};\n";
6413
6414 Result += "\nstruct _ivar_t {\n";
6415 Result += "\tunsigned long int *offset; // pointer to ivar offset location\n";
6416 Result += "\tconst char *name;\n";
6417 Result += "\tconst char *type;\n";
6418 Result += "\tunsigned int alignment;\n";
6419 Result += "\tunsigned int size;\n";
6420 Result += "};\n";
6421
6422 Result += "\nstruct _class_ro_t {\n";
6423 Result += "\tunsigned int flags;\n";
6424 Result += "\tunsigned int instanceStart;\n";
6425 Result += "\tunsigned int instanceSize;\n";
6426 const llvm::Triple &Triple(Context->getTargetInfo().getTriple());
6427 if (Triple.getArch() == llvm::Triple::x86_64)
6428 Result += "\tunsigned int reserved;\n";
6429 Result += "\tconst unsigned char *ivarLayout;\n";
6430 Result += "\tconst char *name;\n";
6431 Result += "\tconst struct _method_list_t *baseMethods;\n";
6432 Result += "\tconst struct _objc_protocol_list *baseProtocols;\n";
6433 Result += "\tconst struct _ivar_list_t *ivars;\n";
6434 Result += "\tconst unsigned char *weakIvarLayout;\n";
6435 Result += "\tconst struct _prop_list_t *properties;\n";
6436 Result += "};\n";
6437
6438 Result += "\nstruct _class_t {\n";
6439 Result += "\tstruct _class_t *isa;\n";
6440 Result += "\tstruct _class_t *superclass;\n";
6441 Result += "\tvoid *cache;\n";
6442 Result += "\tvoid *vtable;\n";
6443 Result += "\tstruct _class_ro_t *ro;\n";
6444 Result += "};\n";
6445
6446 Result += "\nstruct _category_t {\n";
6447 Result += "\tconst char *name;\n";
6448 Result += "\tstruct _class_t *cls;\n";
6449 Result += "\tconst struct _method_list_t *instance_methods;\n";
6450 Result += "\tconst struct _method_list_t *class_methods;\n";
6451 Result += "\tconst struct _protocol_list_t *protocols;\n";
6452 Result += "\tconst struct _prop_list_t *properties;\n";
6453 Result += "};\n";
6454
6455 Result += "extern \"C\" __declspec(dllimport) struct objc_cache _objc_empty_cache;\n";
6456 Result += "#pragma warning(disable:4273)\n";
6457 meta_data_declared = true;
6458 }
6459
Write_protocol_list_t_TypeDecl(std::string & Result,long super_protocol_count)6460 static void Write_protocol_list_t_TypeDecl(std::string &Result,
6461 long super_protocol_count) {
6462 Result += "struct /*_protocol_list_t*/"; Result += " {\n";
6463 Result += "\tlong protocol_count; // Note, this is 32/64 bit\n";
6464 Result += "\tstruct _protocol_t *super_protocols[";
6465 Result += utostr(super_protocol_count); Result += "];\n";
6466 Result += "}";
6467 }
6468
Write_method_list_t_TypeDecl(std::string & Result,unsigned int method_count)6469 static void Write_method_list_t_TypeDecl(std::string &Result,
6470 unsigned int method_count) {
6471 Result += "struct /*_method_list_t*/"; Result += " {\n";
6472 Result += "\tunsigned int entsize; // sizeof(struct _objc_method)\n";
6473 Result += "\tunsigned int method_count;\n";
6474 Result += "\tstruct _objc_method method_list[";
6475 Result += utostr(method_count); Result += "];\n";
6476 Result += "}";
6477 }
6478
Write__prop_list_t_TypeDecl(std::string & Result,unsigned int property_count)6479 static void Write__prop_list_t_TypeDecl(std::string &Result,
6480 unsigned int property_count) {
6481 Result += "struct /*_prop_list_t*/"; Result += " {\n";
6482 Result += "\tunsigned int entsize; // sizeof(struct _prop_t)\n";
6483 Result += "\tunsigned int count_of_properties;\n";
6484 Result += "\tstruct _prop_t prop_list[";
6485 Result += utostr(property_count); Result += "];\n";
6486 Result += "}";
6487 }
6488
Write__ivar_list_t_TypeDecl(std::string & Result,unsigned int ivar_count)6489 static void Write__ivar_list_t_TypeDecl(std::string &Result,
6490 unsigned int ivar_count) {
6491 Result += "struct /*_ivar_list_t*/"; Result += " {\n";
6492 Result += "\tunsigned int entsize; // sizeof(struct _prop_t)\n";
6493 Result += "\tunsigned int count;\n";
6494 Result += "\tstruct _ivar_t ivar_list[";
6495 Result += utostr(ivar_count); Result += "];\n";
6496 Result += "}";
6497 }
6498
Write_protocol_list_initializer(ASTContext * Context,std::string & Result,ArrayRef<ObjCProtocolDecl * > SuperProtocols,StringRef VarName,StringRef ProtocolName)6499 static void Write_protocol_list_initializer(ASTContext *Context, std::string &Result,
6500 ArrayRef<ObjCProtocolDecl *> SuperProtocols,
6501 StringRef VarName,
6502 StringRef ProtocolName) {
6503 if (SuperProtocols.size() > 0) {
6504 Result += "\nstatic ";
6505 Write_protocol_list_t_TypeDecl(Result, SuperProtocols.size());
6506 Result += " "; Result += VarName;
6507 Result += ProtocolName;
6508 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6509 Result += "\t"; Result += utostr(SuperProtocols.size()); Result += ",\n";
6510 for (unsigned i = 0, e = SuperProtocols.size(); i < e; i++) {
6511 ObjCProtocolDecl *SuperPD = SuperProtocols[i];
6512 Result += "\t&"; Result += "_OBJC_PROTOCOL_";
6513 Result += SuperPD->getNameAsString();
6514 if (i == e-1)
6515 Result += "\n};\n";
6516 else
6517 Result += ",\n";
6518 }
6519 }
6520 }
6521
Write_method_list_t_initializer(RewriteModernObjC & RewriteObj,ASTContext * Context,std::string & Result,ArrayRef<ObjCMethodDecl * > Methods,StringRef VarName,StringRef TopLevelDeclName,bool MethodImpl)6522 static void Write_method_list_t_initializer(RewriteModernObjC &RewriteObj,
6523 ASTContext *Context, std::string &Result,
6524 ArrayRef<ObjCMethodDecl *> Methods,
6525 StringRef VarName,
6526 StringRef TopLevelDeclName,
6527 bool MethodImpl) {
6528 if (Methods.size() > 0) {
6529 Result += "\nstatic ";
6530 Write_method_list_t_TypeDecl(Result, Methods.size());
6531 Result += " "; Result += VarName;
6532 Result += TopLevelDeclName;
6533 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6534 Result += "\t"; Result += "sizeof(_objc_method)"; Result += ",\n";
6535 Result += "\t"; Result += utostr(Methods.size()); Result += ",\n";
6536 for (unsigned i = 0, e = Methods.size(); i < e; i++) {
6537 ObjCMethodDecl *MD = Methods[i];
6538 if (i == 0)
6539 Result += "\t{{(struct objc_selector *)\"";
6540 else
6541 Result += "\t{(struct objc_selector *)\"";
6542 Result += (MD)->getSelector().getAsString(); Result += "\"";
6543 Result += ", ";
6544 std::string MethodTypeString;
6545 Context->getObjCEncodingForMethodDecl(MD, MethodTypeString);
6546 Result += "\""; Result += MethodTypeString; Result += "\"";
6547 Result += ", ";
6548 if (!MethodImpl)
6549 Result += "0";
6550 else {
6551 Result += "(void *)";
6552 Result += RewriteObj.MethodInternalNames[MD];
6553 }
6554 if (i == e-1)
6555 Result += "}}\n";
6556 else
6557 Result += "},\n";
6558 }
6559 Result += "};\n";
6560 }
6561 }
6562
Write_prop_list_t_initializer(RewriteModernObjC & RewriteObj,ASTContext * Context,std::string & Result,ArrayRef<ObjCPropertyDecl * > Properties,const Decl * Container,StringRef VarName,StringRef ProtocolName)6563 static void Write_prop_list_t_initializer(RewriteModernObjC &RewriteObj,
6564 ASTContext *Context, std::string &Result,
6565 ArrayRef<ObjCPropertyDecl *> Properties,
6566 const Decl *Container,
6567 StringRef VarName,
6568 StringRef ProtocolName) {
6569 if (Properties.size() > 0) {
6570 Result += "\nstatic ";
6571 Write__prop_list_t_TypeDecl(Result, Properties.size());
6572 Result += " "; Result += VarName;
6573 Result += ProtocolName;
6574 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6575 Result += "\t"; Result += "sizeof(_prop_t)"; Result += ",\n";
6576 Result += "\t"; Result += utostr(Properties.size()); Result += ",\n";
6577 for (unsigned i = 0, e = Properties.size(); i < e; i++) {
6578 ObjCPropertyDecl *PropDecl = Properties[i];
6579 if (i == 0)
6580 Result += "\t{{\"";
6581 else
6582 Result += "\t{\"";
6583 Result += PropDecl->getName(); Result += "\",";
6584 std::string PropertyTypeString, QuotePropertyTypeString;
6585 Context->getObjCEncodingForPropertyDecl(PropDecl, Container, PropertyTypeString);
6586 RewriteObj.QuoteDoublequotes(PropertyTypeString, QuotePropertyTypeString);
6587 Result += "\""; Result += QuotePropertyTypeString; Result += "\"";
6588 if (i == e-1)
6589 Result += "}}\n";
6590 else
6591 Result += "},\n";
6592 }
6593 Result += "};\n";
6594 }
6595 }
6596
6597 // Metadata flags
6598 enum MetaDataDlags {
6599 CLS = 0x0,
6600 CLS_META = 0x1,
6601 CLS_ROOT = 0x2,
6602 OBJC2_CLS_HIDDEN = 0x10,
6603 CLS_EXCEPTION = 0x20,
6604
6605 /// (Obsolete) ARC-specific: this class has a .release_ivars method
6606 CLS_HAS_IVAR_RELEASER = 0x40,
6607 /// class was compiled with -fobjc-arr
6608 CLS_COMPILED_BY_ARC = 0x80 // (1<<7)
6609 };
6610
Write__class_ro_t_initializer(ASTContext * Context,std::string & Result,unsigned int flags,const std::string & InstanceStart,const std::string & InstanceSize,ArrayRef<ObjCMethodDecl * > baseMethods,ArrayRef<ObjCProtocolDecl * > baseProtocols,ArrayRef<ObjCIvarDecl * > ivars,ArrayRef<ObjCPropertyDecl * > Properties,StringRef VarName,StringRef ClassName)6611 static void Write__class_ro_t_initializer(ASTContext *Context, std::string &Result,
6612 unsigned int flags,
6613 const std::string &InstanceStart,
6614 const std::string &InstanceSize,
6615 ArrayRef<ObjCMethodDecl *>baseMethods,
6616 ArrayRef<ObjCProtocolDecl *>baseProtocols,
6617 ArrayRef<ObjCIvarDecl *>ivars,
6618 ArrayRef<ObjCPropertyDecl *>Properties,
6619 StringRef VarName,
6620 StringRef ClassName) {
6621 Result += "\nstatic struct _class_ro_t ";
6622 Result += VarName; Result += ClassName;
6623 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6624 Result += "\t";
6625 Result += llvm::utostr(flags); Result += ", ";
6626 Result += InstanceStart; Result += ", ";
6627 Result += InstanceSize; Result += ", \n";
6628 Result += "\t";
6629 const llvm::Triple &Triple(Context->getTargetInfo().getTriple());
6630 if (Triple.getArch() == llvm::Triple::x86_64)
6631 // uint32_t const reserved; // only when building for 64bit targets
6632 Result += "(unsigned int)0, \n\t";
6633 // const uint8_t * const ivarLayout;
6634 Result += "0, \n\t";
6635 Result += "\""; Result += ClassName; Result += "\",\n\t";
6636 bool metaclass = ((flags & CLS_META) != 0);
6637 if (baseMethods.size() > 0) {
6638 Result += "(const struct _method_list_t *)&";
6639 if (metaclass)
6640 Result += "_OBJC_$_CLASS_METHODS_";
6641 else
6642 Result += "_OBJC_$_INSTANCE_METHODS_";
6643 Result += ClassName;
6644 Result += ",\n\t";
6645 }
6646 else
6647 Result += "0, \n\t";
6648
6649 if (!metaclass && baseProtocols.size() > 0) {
6650 Result += "(const struct _objc_protocol_list *)&";
6651 Result += "_OBJC_CLASS_PROTOCOLS_$_"; Result += ClassName;
6652 Result += ",\n\t";
6653 }
6654 else
6655 Result += "0, \n\t";
6656
6657 if (!metaclass && ivars.size() > 0) {
6658 Result += "(const struct _ivar_list_t *)&";
6659 Result += "_OBJC_$_INSTANCE_VARIABLES_"; Result += ClassName;
6660 Result += ",\n\t";
6661 }
6662 else
6663 Result += "0, \n\t";
6664
6665 // weakIvarLayout
6666 Result += "0, \n\t";
6667 if (!metaclass && Properties.size() > 0) {
6668 Result += "(const struct _prop_list_t *)&";
6669 Result += "_OBJC_$_PROP_LIST_"; Result += ClassName;
6670 Result += ",\n";
6671 }
6672 else
6673 Result += "0, \n";
6674
6675 Result += "};\n";
6676 }
6677
Write_class_t(ASTContext * Context,std::string & Result,StringRef VarName,const ObjCInterfaceDecl * CDecl,bool metaclass)6678 static void Write_class_t(ASTContext *Context, std::string &Result,
6679 StringRef VarName,
6680 const ObjCInterfaceDecl *CDecl, bool metaclass) {
6681 bool rootClass = (!CDecl->getSuperClass());
6682 const ObjCInterfaceDecl *RootClass = CDecl;
6683
6684 if (!rootClass) {
6685 // Find the Root class
6686 RootClass = CDecl->getSuperClass();
6687 while (RootClass->getSuperClass()) {
6688 RootClass = RootClass->getSuperClass();
6689 }
6690 }
6691
6692 if (metaclass && rootClass) {
6693 // Need to handle a case of use of forward declaration.
6694 Result += "\n";
6695 Result += "extern \"C\" ";
6696 if (CDecl->getImplementation())
6697 Result += "__declspec(dllexport) ";
6698 else
6699 Result += "__declspec(dllimport) ";
6700
6701 Result += "struct _class_t OBJC_CLASS_$_";
6702 Result += CDecl->getNameAsString();
6703 Result += ";\n";
6704 }
6705 // Also, for possibility of 'super' metadata class not having been defined yet.
6706 if (!rootClass) {
6707 ObjCInterfaceDecl *SuperClass = CDecl->getSuperClass();
6708 Result += "\n";
6709 Result += "extern \"C\" ";
6710 if (SuperClass->getImplementation())
6711 Result += "__declspec(dllexport) ";
6712 else
6713 Result += "__declspec(dllimport) ";
6714
6715 Result += "struct _class_t ";
6716 Result += VarName;
6717 Result += SuperClass->getNameAsString();
6718 Result += ";\n";
6719
6720 if (metaclass && RootClass != SuperClass) {
6721 Result += "extern \"C\" ";
6722 if (RootClass->getImplementation())
6723 Result += "__declspec(dllexport) ";
6724 else
6725 Result += "__declspec(dllimport) ";
6726
6727 Result += "struct _class_t ";
6728 Result += VarName;
6729 Result += RootClass->getNameAsString();
6730 Result += ";\n";
6731 }
6732 }
6733
6734 Result += "\nextern \"C\" __declspec(dllexport) struct _class_t ";
6735 Result += VarName; Result += CDecl->getNameAsString();
6736 Result += " __attribute__ ((used, section (\"__DATA,__objc_data\"))) = {\n";
6737 Result += "\t";
6738 if (metaclass) {
6739 if (!rootClass) {
6740 Result += "0, // &"; Result += VarName;
6741 Result += RootClass->getNameAsString();
6742 Result += ",\n\t";
6743 Result += "0, // &"; Result += VarName;
6744 Result += CDecl->getSuperClass()->getNameAsString();
6745 Result += ",\n\t";
6746 }
6747 else {
6748 Result += "0, // &"; Result += VarName;
6749 Result += CDecl->getNameAsString();
6750 Result += ",\n\t";
6751 Result += "0, // &OBJC_CLASS_$_"; Result += CDecl->getNameAsString();
6752 Result += ",\n\t";
6753 }
6754 }
6755 else {
6756 Result += "0, // &OBJC_METACLASS_$_";
6757 Result += CDecl->getNameAsString();
6758 Result += ",\n\t";
6759 if (!rootClass) {
6760 Result += "0, // &"; Result += VarName;
6761 Result += CDecl->getSuperClass()->getNameAsString();
6762 Result += ",\n\t";
6763 }
6764 else
6765 Result += "0,\n\t";
6766 }
6767 Result += "0, // (void *)&_objc_empty_cache,\n\t";
6768 Result += "0, // unused, was (void *)&_objc_empty_vtable,\n\t";
6769 if (metaclass)
6770 Result += "&_OBJC_METACLASS_RO_$_";
6771 else
6772 Result += "&_OBJC_CLASS_RO_$_";
6773 Result += CDecl->getNameAsString();
6774 Result += ",\n};\n";
6775
6776 // Add static function to initialize some of the meta-data fields.
6777 // avoid doing it twice.
6778 if (metaclass)
6779 return;
6780
6781 const ObjCInterfaceDecl *SuperClass =
6782 rootClass ? CDecl : CDecl->getSuperClass();
6783
6784 Result += "static void OBJC_CLASS_SETUP_$_";
6785 Result += CDecl->getNameAsString();
6786 Result += "(void ) {\n";
6787 Result += "\tOBJC_METACLASS_$_"; Result += CDecl->getNameAsString();
6788 Result += ".isa = "; Result += "&OBJC_METACLASS_$_";
6789 Result += RootClass->getNameAsString(); Result += ";\n";
6790
6791 Result += "\tOBJC_METACLASS_$_"; Result += CDecl->getNameAsString();
6792 Result += ".superclass = ";
6793 if (rootClass)
6794 Result += "&OBJC_CLASS_$_";
6795 else
6796 Result += "&OBJC_METACLASS_$_";
6797
6798 Result += SuperClass->getNameAsString(); Result += ";\n";
6799
6800 Result += "\tOBJC_METACLASS_$_"; Result += CDecl->getNameAsString();
6801 Result += ".cache = "; Result += "&_objc_empty_cache"; Result += ";\n";
6802
6803 Result += "\tOBJC_CLASS_$_"; Result += CDecl->getNameAsString();
6804 Result += ".isa = "; Result += "&OBJC_METACLASS_$_";
6805 Result += CDecl->getNameAsString(); Result += ";\n";
6806
6807 if (!rootClass) {
6808 Result += "\tOBJC_CLASS_$_"; Result += CDecl->getNameAsString();
6809 Result += ".superclass = "; Result += "&OBJC_CLASS_$_";
6810 Result += SuperClass->getNameAsString(); Result += ";\n";
6811 }
6812
6813 Result += "\tOBJC_CLASS_$_"; Result += CDecl->getNameAsString();
6814 Result += ".cache = "; Result += "&_objc_empty_cache"; Result += ";\n";
6815 Result += "}\n";
6816 }
6817
Write_category_t(RewriteModernObjC & RewriteObj,ASTContext * Context,std::string & Result,ObjCCategoryDecl * CatDecl,ObjCInterfaceDecl * ClassDecl,ArrayRef<ObjCMethodDecl * > InstanceMethods,ArrayRef<ObjCMethodDecl * > ClassMethods,ArrayRef<ObjCProtocolDecl * > RefedProtocols,ArrayRef<ObjCPropertyDecl * > ClassProperties)6818 static void Write_category_t(RewriteModernObjC &RewriteObj, ASTContext *Context,
6819 std::string &Result,
6820 ObjCCategoryDecl *CatDecl,
6821 ObjCInterfaceDecl *ClassDecl,
6822 ArrayRef<ObjCMethodDecl *> InstanceMethods,
6823 ArrayRef<ObjCMethodDecl *> ClassMethods,
6824 ArrayRef<ObjCProtocolDecl *> RefedProtocols,
6825 ArrayRef<ObjCPropertyDecl *> ClassProperties) {
6826 StringRef CatName = CatDecl->getName();
6827 StringRef ClassName = ClassDecl->getName();
6828 // must declare an extern class object in case this class is not implemented
6829 // in this TU.
6830 Result += "\n";
6831 Result += "extern \"C\" ";
6832 if (ClassDecl->getImplementation())
6833 Result += "__declspec(dllexport) ";
6834 else
6835 Result += "__declspec(dllimport) ";
6836
6837 Result += "struct _class_t ";
6838 Result += "OBJC_CLASS_$_"; Result += ClassName;
6839 Result += ";\n";
6840
6841 Result += "\nstatic struct _category_t ";
6842 Result += "_OBJC_$_CATEGORY_";
6843 Result += ClassName; Result += "_$_"; Result += CatName;
6844 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = \n";
6845 Result += "{\n";
6846 Result += "\t\""; Result += ClassName; Result += "\",\n";
6847 Result += "\t0, // &"; Result += "OBJC_CLASS_$_"; Result += ClassName;
6848 Result += ",\n";
6849 if (InstanceMethods.size() > 0) {
6850 Result += "\t(const struct _method_list_t *)&";
6851 Result += "_OBJC_$_CATEGORY_INSTANCE_METHODS_";
6852 Result += ClassName; Result += "_$_"; Result += CatName;
6853 Result += ",\n";
6854 }
6855 else
6856 Result += "\t0,\n";
6857
6858 if (ClassMethods.size() > 0) {
6859 Result += "\t(const struct _method_list_t *)&";
6860 Result += "_OBJC_$_CATEGORY_CLASS_METHODS_";
6861 Result += ClassName; Result += "_$_"; Result += CatName;
6862 Result += ",\n";
6863 }
6864 else
6865 Result += "\t0,\n";
6866
6867 if (RefedProtocols.size() > 0) {
6868 Result += "\t(const struct _protocol_list_t *)&";
6869 Result += "_OBJC_CATEGORY_PROTOCOLS_$_";
6870 Result += ClassName; Result += "_$_"; Result += CatName;
6871 Result += ",\n";
6872 }
6873 else
6874 Result += "\t0,\n";
6875
6876 if (ClassProperties.size() > 0) {
6877 Result += "\t(const struct _prop_list_t *)&"; Result += "_OBJC_$_PROP_LIST_";
6878 Result += ClassName; Result += "_$_"; Result += CatName;
6879 Result += ",\n";
6880 }
6881 else
6882 Result += "\t0,\n";
6883
6884 Result += "};\n";
6885
6886 // Add static function to initialize the class pointer in the category structure.
6887 Result += "static void OBJC_CATEGORY_SETUP_$_";
6888 Result += ClassDecl->getNameAsString();
6889 Result += "_$_";
6890 Result += CatName;
6891 Result += "(void ) {\n";
6892 Result += "\t_OBJC_$_CATEGORY_";
6893 Result += ClassDecl->getNameAsString();
6894 Result += "_$_";
6895 Result += CatName;
6896 Result += ".cls = "; Result += "&OBJC_CLASS_$_"; Result += ClassName;
6897 Result += ";\n}\n";
6898 }
6899
Write__extendedMethodTypes_initializer(RewriteModernObjC & RewriteObj,ASTContext * Context,std::string & Result,ArrayRef<ObjCMethodDecl * > Methods,StringRef VarName,StringRef ProtocolName)6900 static void Write__extendedMethodTypes_initializer(RewriteModernObjC &RewriteObj,
6901 ASTContext *Context, std::string &Result,
6902 ArrayRef<ObjCMethodDecl *> Methods,
6903 StringRef VarName,
6904 StringRef ProtocolName) {
6905 if (Methods.size() == 0)
6906 return;
6907
6908 Result += "\nstatic const char *";
6909 Result += VarName; Result += ProtocolName;
6910 Result += " [] __attribute__ ((used, section (\"__DATA,__objc_const\"))) = \n";
6911 Result += "{\n";
6912 for (unsigned i = 0, e = Methods.size(); i < e; i++) {
6913 ObjCMethodDecl *MD = Methods[i];
6914 std::string MethodTypeString, QuoteMethodTypeString;
6915 Context->getObjCEncodingForMethodDecl(MD, MethodTypeString, true);
6916 RewriteObj.QuoteDoublequotes(MethodTypeString, QuoteMethodTypeString);
6917 Result += "\t\""; Result += QuoteMethodTypeString; Result += "\"";
6918 if (i == e-1)
6919 Result += "\n};\n";
6920 else {
6921 Result += ",\n";
6922 }
6923 }
6924 }
6925
Write_IvarOffsetVar(RewriteModernObjC & RewriteObj,ASTContext * Context,std::string & Result,ArrayRef<ObjCIvarDecl * > Ivars,ObjCInterfaceDecl * CDecl)6926 static void Write_IvarOffsetVar(RewriteModernObjC &RewriteObj,
6927 ASTContext *Context,
6928 std::string &Result,
6929 ArrayRef<ObjCIvarDecl *> Ivars,
6930 ObjCInterfaceDecl *CDecl) {
6931 // FIXME. visibilty of offset symbols may have to be set; for Darwin
6932 // this is what happens:
6933 /**
6934 if (Ivar->getAccessControl() == ObjCIvarDecl::Private ||
6935 Ivar->getAccessControl() == ObjCIvarDecl::Package ||
6936 Class->getVisibility() == HiddenVisibility)
6937 Visibility shoud be: HiddenVisibility;
6938 else
6939 Visibility shoud be: DefaultVisibility;
6940 */
6941
6942 Result += "\n";
6943 for (unsigned i =0, e = Ivars.size(); i < e; i++) {
6944 ObjCIvarDecl *IvarDecl = Ivars[i];
6945 if (Context->getLangOpts().MicrosoftExt)
6946 Result += "__declspec(allocate(\".objc_ivar$B\")) ";
6947
6948 if (!Context->getLangOpts().MicrosoftExt ||
6949 IvarDecl->getAccessControl() == ObjCIvarDecl::Private ||
6950 IvarDecl->getAccessControl() == ObjCIvarDecl::Package)
6951 Result += "extern \"C\" unsigned long int ";
6952 else
6953 Result += "extern \"C\" __declspec(dllexport) unsigned long int ";
6954 if (Ivars[i]->isBitField())
6955 RewriteObj.ObjCIvarBitfieldGroupOffset(IvarDecl, Result);
6956 else
6957 WriteInternalIvarName(CDecl, IvarDecl, Result);
6958 Result += " __attribute__ ((used, section (\"__DATA,__objc_ivar\")))";
6959 Result += " = ";
6960 RewriteObj.RewriteIvarOffsetComputation(IvarDecl, Result);
6961 Result += ";\n";
6962 if (Ivars[i]->isBitField()) {
6963 // skip over rest of the ivar bitfields.
6964 SKIP_BITFIELDS(i , e, Ivars);
6965 }
6966 }
6967 }
6968
Write__ivar_list_t_initializer(RewriteModernObjC & RewriteObj,ASTContext * Context,std::string & Result,ArrayRef<ObjCIvarDecl * > OriginalIvars,StringRef VarName,ObjCInterfaceDecl * CDecl)6969 static void Write__ivar_list_t_initializer(RewriteModernObjC &RewriteObj,
6970 ASTContext *Context, std::string &Result,
6971 ArrayRef<ObjCIvarDecl *> OriginalIvars,
6972 StringRef VarName,
6973 ObjCInterfaceDecl *CDecl) {
6974 if (OriginalIvars.size() > 0) {
6975 Write_IvarOffsetVar(RewriteObj, Context, Result, OriginalIvars, CDecl);
6976 SmallVector<ObjCIvarDecl *, 8> Ivars;
6977 // strip off all but the first ivar bitfield from each group of ivars.
6978 // Such ivars in the ivar list table will be replaced by their grouping struct
6979 // 'ivar'.
6980 for (unsigned i = 0, e = OriginalIvars.size(); i < e; i++) {
6981 if (OriginalIvars[i]->isBitField()) {
6982 Ivars.push_back(OriginalIvars[i]);
6983 // skip over rest of the ivar bitfields.
6984 SKIP_BITFIELDS(i , e, OriginalIvars);
6985 }
6986 else
6987 Ivars.push_back(OriginalIvars[i]);
6988 }
6989
6990 Result += "\nstatic ";
6991 Write__ivar_list_t_TypeDecl(Result, Ivars.size());
6992 Result += " "; Result += VarName;
6993 Result += CDecl->getNameAsString();
6994 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6995 Result += "\t"; Result += "sizeof(_ivar_t)"; Result += ",\n";
6996 Result += "\t"; Result += utostr(Ivars.size()); Result += ",\n";
6997 for (unsigned i =0, e = Ivars.size(); i < e; i++) {
6998 ObjCIvarDecl *IvarDecl = Ivars[i];
6999 if (i == 0)
7000 Result += "\t{{";
7001 else
7002 Result += "\t {";
7003 Result += "(unsigned long int *)&";
7004 if (Ivars[i]->isBitField())
7005 RewriteObj.ObjCIvarBitfieldGroupOffset(IvarDecl, Result);
7006 else
7007 WriteInternalIvarName(CDecl, IvarDecl, Result);
7008 Result += ", ";
7009
7010 Result += "\"";
7011 if (Ivars[i]->isBitField())
7012 RewriteObj.ObjCIvarBitfieldGroupDecl(Ivars[i], Result);
7013 else
7014 Result += IvarDecl->getName();
7015 Result += "\", ";
7016
7017 QualType IVQT = IvarDecl->getType();
7018 if (IvarDecl->isBitField())
7019 IVQT = RewriteObj.GetGroupRecordTypeForObjCIvarBitfield(IvarDecl);
7020
7021 std::string IvarTypeString, QuoteIvarTypeString;
7022 Context->getObjCEncodingForType(IVQT, IvarTypeString,
7023 IvarDecl);
7024 RewriteObj.QuoteDoublequotes(IvarTypeString, QuoteIvarTypeString);
7025 Result += "\""; Result += QuoteIvarTypeString; Result += "\", ";
7026
7027 // FIXME. this alignment represents the host alignment and need be changed to
7028 // represent the target alignment.
7029 unsigned Align = Context->getTypeAlign(IVQT)/8;
7030 Align = llvm::Log2_32(Align);
7031 Result += llvm::utostr(Align); Result += ", ";
7032 CharUnits Size = Context->getTypeSizeInChars(IVQT);
7033 Result += llvm::utostr(Size.getQuantity());
7034 if (i == e-1)
7035 Result += "}}\n";
7036 else
7037 Result += "},\n";
7038 }
7039 Result += "};\n";
7040 }
7041 }
7042
7043 /// RewriteObjCProtocolMetaData - Rewrite protocols meta-data.
RewriteObjCProtocolMetaData(ObjCProtocolDecl * PDecl,std::string & Result)7044 void RewriteModernObjC::RewriteObjCProtocolMetaData(ObjCProtocolDecl *PDecl,
7045 std::string &Result) {
7046
7047 // Do not synthesize the protocol more than once.
7048 if (ObjCSynthesizedProtocols.count(PDecl->getCanonicalDecl()))
7049 return;
7050 WriteModernMetadataDeclarations(Context, Result);
7051
7052 if (ObjCProtocolDecl *Def = PDecl->getDefinition())
7053 PDecl = Def;
7054 // Must write out all protocol definitions in current qualifier list,
7055 // and in their nested qualifiers before writing out current definition.
7056 for (ObjCProtocolDecl::protocol_iterator I = PDecl->protocol_begin(),
7057 E = PDecl->protocol_end(); I != E; ++I)
7058 RewriteObjCProtocolMetaData(*I, Result);
7059
7060 // Construct method lists.
7061 std::vector<ObjCMethodDecl *> InstanceMethods, ClassMethods;
7062 std::vector<ObjCMethodDecl *> OptInstanceMethods, OptClassMethods;
7063 for (ObjCProtocolDecl::instmeth_iterator
7064 I = PDecl->instmeth_begin(), E = PDecl->instmeth_end();
7065 I != E; ++I) {
7066 ObjCMethodDecl *MD = *I;
7067 if (MD->getImplementationControl() == ObjCMethodDecl::Optional) {
7068 OptInstanceMethods.push_back(MD);
7069 } else {
7070 InstanceMethods.push_back(MD);
7071 }
7072 }
7073
7074 for (ObjCProtocolDecl::classmeth_iterator
7075 I = PDecl->classmeth_begin(), E = PDecl->classmeth_end();
7076 I != E; ++I) {
7077 ObjCMethodDecl *MD = *I;
7078 if (MD->getImplementationControl() == ObjCMethodDecl::Optional) {
7079 OptClassMethods.push_back(MD);
7080 } else {
7081 ClassMethods.push_back(MD);
7082 }
7083 }
7084 std::vector<ObjCMethodDecl *> AllMethods;
7085 for (unsigned i = 0, e = InstanceMethods.size(); i < e; i++)
7086 AllMethods.push_back(InstanceMethods[i]);
7087 for (unsigned i = 0, e = ClassMethods.size(); i < e; i++)
7088 AllMethods.push_back(ClassMethods[i]);
7089 for (unsigned i = 0, e = OptInstanceMethods.size(); i < e; i++)
7090 AllMethods.push_back(OptInstanceMethods[i]);
7091 for (unsigned i = 0, e = OptClassMethods.size(); i < e; i++)
7092 AllMethods.push_back(OptClassMethods[i]);
7093
7094 Write__extendedMethodTypes_initializer(*this, Context, Result,
7095 AllMethods,
7096 "_OBJC_PROTOCOL_METHOD_TYPES_",
7097 PDecl->getNameAsString());
7098 // Protocol's super protocol list
7099 std::vector<ObjCProtocolDecl *> SuperProtocols;
7100 for (ObjCProtocolDecl::protocol_iterator I = PDecl->protocol_begin(),
7101 E = PDecl->protocol_end(); I != E; ++I)
7102 SuperProtocols.push_back(*I);
7103
7104 Write_protocol_list_initializer(Context, Result, SuperProtocols,
7105 "_OBJC_PROTOCOL_REFS_",
7106 PDecl->getNameAsString());
7107
7108 Write_method_list_t_initializer(*this, Context, Result, InstanceMethods,
7109 "_OBJC_PROTOCOL_INSTANCE_METHODS_",
7110 PDecl->getNameAsString(), false);
7111
7112 Write_method_list_t_initializer(*this, Context, Result, ClassMethods,
7113 "_OBJC_PROTOCOL_CLASS_METHODS_",
7114 PDecl->getNameAsString(), false);
7115
7116 Write_method_list_t_initializer(*this, Context, Result, OptInstanceMethods,
7117 "_OBJC_PROTOCOL_OPT_INSTANCE_METHODS_",
7118 PDecl->getNameAsString(), false);
7119
7120 Write_method_list_t_initializer(*this, Context, Result, OptClassMethods,
7121 "_OBJC_PROTOCOL_OPT_CLASS_METHODS_",
7122 PDecl->getNameAsString(), false);
7123
7124 // Protocol's property metadata.
7125 std::vector<ObjCPropertyDecl *> ProtocolProperties;
7126 for (ObjCContainerDecl::prop_iterator I = PDecl->prop_begin(),
7127 E = PDecl->prop_end(); I != E; ++I)
7128 ProtocolProperties.push_back(*I);
7129
7130 Write_prop_list_t_initializer(*this, Context, Result, ProtocolProperties,
7131 /* Container */0,
7132 "_OBJC_PROTOCOL_PROPERTIES_",
7133 PDecl->getNameAsString());
7134
7135 // Writer out root metadata for current protocol: struct _protocol_t
7136 Result += "\n";
7137 if (LangOpts.MicrosoftExt)
7138 Result += "static ";
7139 Result += "struct _protocol_t _OBJC_PROTOCOL_";
7140 Result += PDecl->getNameAsString();
7141 Result += " __attribute__ ((used, section (\"__DATA,__datacoal_nt,coalesced\"))) = {\n";
7142 Result += "\t0,\n"; // id is; is null
7143 Result += "\t\""; Result += PDecl->getNameAsString(); Result += "\",\n";
7144 if (SuperProtocols.size() > 0) {
7145 Result += "\t(const struct _protocol_list_t *)&"; Result += "_OBJC_PROTOCOL_REFS_";
7146 Result += PDecl->getNameAsString(); Result += ",\n";
7147 }
7148 else
7149 Result += "\t0,\n";
7150 if (InstanceMethods.size() > 0) {
7151 Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_INSTANCE_METHODS_";
7152 Result += PDecl->getNameAsString(); Result += ",\n";
7153 }
7154 else
7155 Result += "\t0,\n";
7156
7157 if (ClassMethods.size() > 0) {
7158 Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_CLASS_METHODS_";
7159 Result += PDecl->getNameAsString(); Result += ",\n";
7160 }
7161 else
7162 Result += "\t0,\n";
7163
7164 if (OptInstanceMethods.size() > 0) {
7165 Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_OPT_INSTANCE_METHODS_";
7166 Result += PDecl->getNameAsString(); Result += ",\n";
7167 }
7168 else
7169 Result += "\t0,\n";
7170
7171 if (OptClassMethods.size() > 0) {
7172 Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_OPT_CLASS_METHODS_";
7173 Result += PDecl->getNameAsString(); Result += ",\n";
7174 }
7175 else
7176 Result += "\t0,\n";
7177
7178 if (ProtocolProperties.size() > 0) {
7179 Result += "\t(const struct _prop_list_t *)&_OBJC_PROTOCOL_PROPERTIES_";
7180 Result += PDecl->getNameAsString(); Result += ",\n";
7181 }
7182 else
7183 Result += "\t0,\n";
7184
7185 Result += "\t"; Result += "sizeof(_protocol_t)"; Result += ",\n";
7186 Result += "\t0,\n";
7187
7188 if (AllMethods.size() > 0) {
7189 Result += "\t(const char **)&"; Result += "_OBJC_PROTOCOL_METHOD_TYPES_";
7190 Result += PDecl->getNameAsString();
7191 Result += "\n};\n";
7192 }
7193 else
7194 Result += "\t0\n};\n";
7195
7196 if (LangOpts.MicrosoftExt)
7197 Result += "static ";
7198 Result += "struct _protocol_t *";
7199 Result += "_OBJC_LABEL_PROTOCOL_$_"; Result += PDecl->getNameAsString();
7200 Result += " = &_OBJC_PROTOCOL_"; Result += PDecl->getNameAsString();
7201 Result += ";\n";
7202
7203 // Mark this protocol as having been generated.
7204 if (!ObjCSynthesizedProtocols.insert(PDecl->getCanonicalDecl()))
7205 llvm_unreachable("protocol already synthesized");
7206
7207 }
7208
RewriteObjCProtocolListMetaData(const ObjCList<ObjCProtocolDecl> & Protocols,StringRef prefix,StringRef ClassName,std::string & Result)7209 void RewriteModernObjC::RewriteObjCProtocolListMetaData(
7210 const ObjCList<ObjCProtocolDecl> &Protocols,
7211 StringRef prefix, StringRef ClassName,
7212 std::string &Result) {
7213 if (Protocols.empty()) return;
7214
7215 for (unsigned i = 0; i != Protocols.size(); i++)
7216 RewriteObjCProtocolMetaData(Protocols[i], Result);
7217
7218 // Output the top lovel protocol meta-data for the class.
7219 /* struct _objc_protocol_list {
7220 struct _objc_protocol_list *next;
7221 int protocol_count;
7222 struct _objc_protocol *class_protocols[];
7223 }
7224 */
7225 Result += "\n";
7226 if (LangOpts.MicrosoftExt)
7227 Result += "__declspec(allocate(\".cat_cls_meth$B\")) ";
7228 Result += "static struct {\n";
7229 Result += "\tstruct _objc_protocol_list *next;\n";
7230 Result += "\tint protocol_count;\n";
7231 Result += "\tstruct _objc_protocol *class_protocols[";
7232 Result += utostr(Protocols.size());
7233 Result += "];\n} _OBJC_";
7234 Result += prefix;
7235 Result += "_PROTOCOLS_";
7236 Result += ClassName;
7237 Result += " __attribute__ ((used, section (\"__OBJC, __cat_cls_meth\")))= "
7238 "{\n\t0, ";
7239 Result += utostr(Protocols.size());
7240 Result += "\n";
7241
7242 Result += "\t,{&_OBJC_PROTOCOL_";
7243 Result += Protocols[0]->getNameAsString();
7244 Result += " \n";
7245
7246 for (unsigned i = 1; i != Protocols.size(); i++) {
7247 Result += "\t ,&_OBJC_PROTOCOL_";
7248 Result += Protocols[i]->getNameAsString();
7249 Result += "\n";
7250 }
7251 Result += "\t }\n};\n";
7252 }
7253
7254 /// hasObjCExceptionAttribute - Return true if this class or any super
7255 /// class has the __objc_exception__ attribute.
7256 /// FIXME. Move this to ASTContext.cpp as it is also used for IRGen.
hasObjCExceptionAttribute(ASTContext & Context,const ObjCInterfaceDecl * OID)7257 static bool hasObjCExceptionAttribute(ASTContext &Context,
7258 const ObjCInterfaceDecl *OID) {
7259 if (OID->hasAttr<ObjCExceptionAttr>())
7260 return true;
7261 if (const ObjCInterfaceDecl *Super = OID->getSuperClass())
7262 return hasObjCExceptionAttribute(Context, Super);
7263 return false;
7264 }
7265
RewriteObjCClassMetaData(ObjCImplementationDecl * IDecl,std::string & Result)7266 void RewriteModernObjC::RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
7267 std::string &Result) {
7268 ObjCInterfaceDecl *CDecl = IDecl->getClassInterface();
7269
7270 // Explicitly declared @interface's are already synthesized.
7271 if (CDecl->isImplicitInterfaceDecl())
7272 assert(false &&
7273 "Legacy implicit interface rewriting not supported in moder abi");
7274
7275 WriteModernMetadataDeclarations(Context, Result);
7276 SmallVector<ObjCIvarDecl *, 8> IVars;
7277
7278 for (ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
7279 IVD; IVD = IVD->getNextIvar()) {
7280 // Ignore unnamed bit-fields.
7281 if (!IVD->getDeclName())
7282 continue;
7283 IVars.push_back(IVD);
7284 }
7285
7286 Write__ivar_list_t_initializer(*this, Context, Result, IVars,
7287 "_OBJC_$_INSTANCE_VARIABLES_",
7288 CDecl);
7289
7290 // Build _objc_method_list for class's instance methods if needed
7291 SmallVector<ObjCMethodDecl *, 32>
7292 InstanceMethods(IDecl->instmeth_begin(), IDecl->instmeth_end());
7293
7294 // If any of our property implementations have associated getters or
7295 // setters, produce metadata for them as well.
7296 for (ObjCImplDecl::propimpl_iterator Prop = IDecl->propimpl_begin(),
7297 PropEnd = IDecl->propimpl_end();
7298 Prop != PropEnd; ++Prop) {
7299 if (Prop->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
7300 continue;
7301 if (!Prop->getPropertyIvarDecl())
7302 continue;
7303 ObjCPropertyDecl *PD = Prop->getPropertyDecl();
7304 if (!PD)
7305 continue;
7306 if (ObjCMethodDecl *Getter = PD->getGetterMethodDecl())
7307 if (mustSynthesizeSetterGetterMethod(IDecl, PD, true /*getter*/))
7308 InstanceMethods.push_back(Getter);
7309 if (PD->isReadOnly())
7310 continue;
7311 if (ObjCMethodDecl *Setter = PD->getSetterMethodDecl())
7312 if (mustSynthesizeSetterGetterMethod(IDecl, PD, false /*setter*/))
7313 InstanceMethods.push_back(Setter);
7314 }
7315
7316 Write_method_list_t_initializer(*this, Context, Result, InstanceMethods,
7317 "_OBJC_$_INSTANCE_METHODS_",
7318 IDecl->getNameAsString(), true);
7319
7320 SmallVector<ObjCMethodDecl *, 32>
7321 ClassMethods(IDecl->classmeth_begin(), IDecl->classmeth_end());
7322
7323 Write_method_list_t_initializer(*this, Context, Result, ClassMethods,
7324 "_OBJC_$_CLASS_METHODS_",
7325 IDecl->getNameAsString(), true);
7326
7327 // Protocols referenced in class declaration?
7328 // Protocol's super protocol list
7329 std::vector<ObjCProtocolDecl *> RefedProtocols;
7330 const ObjCList<ObjCProtocolDecl> &Protocols = CDecl->getReferencedProtocols();
7331 for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
7332 E = Protocols.end();
7333 I != E; ++I) {
7334 RefedProtocols.push_back(*I);
7335 // Must write out all protocol definitions in current qualifier list,
7336 // and in their nested qualifiers before writing out current definition.
7337 RewriteObjCProtocolMetaData(*I, Result);
7338 }
7339
7340 Write_protocol_list_initializer(Context, Result,
7341 RefedProtocols,
7342 "_OBJC_CLASS_PROTOCOLS_$_",
7343 IDecl->getNameAsString());
7344
7345 // Protocol's property metadata.
7346 std::vector<ObjCPropertyDecl *> ClassProperties;
7347 for (ObjCContainerDecl::prop_iterator I = CDecl->prop_begin(),
7348 E = CDecl->prop_end(); I != E; ++I)
7349 ClassProperties.push_back(*I);
7350
7351 Write_prop_list_t_initializer(*this, Context, Result, ClassProperties,
7352 /* Container */IDecl,
7353 "_OBJC_$_PROP_LIST_",
7354 CDecl->getNameAsString());
7355
7356
7357 // Data for initializing _class_ro_t metaclass meta-data
7358 uint32_t flags = CLS_META;
7359 std::string InstanceSize;
7360 std::string InstanceStart;
7361
7362
7363 bool classIsHidden = CDecl->getVisibility() == HiddenVisibility;
7364 if (classIsHidden)
7365 flags |= OBJC2_CLS_HIDDEN;
7366
7367 if (!CDecl->getSuperClass())
7368 // class is root
7369 flags |= CLS_ROOT;
7370 InstanceSize = "sizeof(struct _class_t)";
7371 InstanceStart = InstanceSize;
7372 Write__class_ro_t_initializer(Context, Result, flags,
7373 InstanceStart, InstanceSize,
7374 ClassMethods,
7375 0,
7376 0,
7377 0,
7378 "_OBJC_METACLASS_RO_$_",
7379 CDecl->getNameAsString());
7380
7381
7382 // Data for initializing _class_ro_t meta-data
7383 flags = CLS;
7384 if (classIsHidden)
7385 flags |= OBJC2_CLS_HIDDEN;
7386
7387 if (hasObjCExceptionAttribute(*Context, CDecl))
7388 flags |= CLS_EXCEPTION;
7389
7390 if (!CDecl->getSuperClass())
7391 // class is root
7392 flags |= CLS_ROOT;
7393
7394 InstanceSize.clear();
7395 InstanceStart.clear();
7396 if (!ObjCSynthesizedStructs.count(CDecl)) {
7397 InstanceSize = "0";
7398 InstanceStart = "0";
7399 }
7400 else {
7401 InstanceSize = "sizeof(struct ";
7402 InstanceSize += CDecl->getNameAsString();
7403 InstanceSize += "_IMPL)";
7404
7405 ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
7406 if (IVD) {
7407 RewriteIvarOffsetComputation(IVD, InstanceStart);
7408 }
7409 else
7410 InstanceStart = InstanceSize;
7411 }
7412 Write__class_ro_t_initializer(Context, Result, flags,
7413 InstanceStart, InstanceSize,
7414 InstanceMethods,
7415 RefedProtocols,
7416 IVars,
7417 ClassProperties,
7418 "_OBJC_CLASS_RO_$_",
7419 CDecl->getNameAsString());
7420
7421 Write_class_t(Context, Result,
7422 "OBJC_METACLASS_$_",
7423 CDecl, /*metaclass*/true);
7424
7425 Write_class_t(Context, Result,
7426 "OBJC_CLASS_$_",
7427 CDecl, /*metaclass*/false);
7428
7429 if (ImplementationIsNonLazy(IDecl))
7430 DefinedNonLazyClasses.push_back(CDecl);
7431
7432 }
7433
RewriteClassSetupInitHook(std::string & Result)7434 void RewriteModernObjC::RewriteClassSetupInitHook(std::string &Result) {
7435 int ClsDefCount = ClassImplementation.size();
7436 if (!ClsDefCount)
7437 return;
7438 Result += "#pragma section(\".objc_inithooks$B\", long, read, write)\n";
7439 Result += "__declspec(allocate(\".objc_inithooks$B\")) ";
7440 Result += "static void *OBJC_CLASS_SETUP[] = {\n";
7441 for (int i = 0; i < ClsDefCount; i++) {
7442 ObjCImplementationDecl *IDecl = ClassImplementation[i];
7443 ObjCInterfaceDecl *CDecl = IDecl->getClassInterface();
7444 Result += "\t(void *)&OBJC_CLASS_SETUP_$_";
7445 Result += CDecl->getName(); Result += ",\n";
7446 }
7447 Result += "};\n";
7448 }
7449
RewriteMetaDataIntoBuffer(std::string & Result)7450 void RewriteModernObjC::RewriteMetaDataIntoBuffer(std::string &Result) {
7451 int ClsDefCount = ClassImplementation.size();
7452 int CatDefCount = CategoryImplementation.size();
7453
7454 // For each implemented class, write out all its meta data.
7455 for (int i = 0; i < ClsDefCount; i++)
7456 RewriteObjCClassMetaData(ClassImplementation[i], Result);
7457
7458 RewriteClassSetupInitHook(Result);
7459
7460 // For each implemented category, write out all its meta data.
7461 for (int i = 0; i < CatDefCount; i++)
7462 RewriteObjCCategoryImplDecl(CategoryImplementation[i], Result);
7463
7464 RewriteCategorySetupInitHook(Result);
7465
7466 if (ClsDefCount > 0) {
7467 if (LangOpts.MicrosoftExt)
7468 Result += "__declspec(allocate(\".objc_classlist$B\")) ";
7469 Result += "static struct _class_t *L_OBJC_LABEL_CLASS_$ [";
7470 Result += llvm::utostr(ClsDefCount); Result += "]";
7471 Result +=
7472 " __attribute__((used, section (\"__DATA, __objc_classlist,"
7473 "regular,no_dead_strip\")))= {\n";
7474 for (int i = 0; i < ClsDefCount; i++) {
7475 Result += "\t&OBJC_CLASS_$_";
7476 Result += ClassImplementation[i]->getNameAsString();
7477 Result += ",\n";
7478 }
7479 Result += "};\n";
7480
7481 if (!DefinedNonLazyClasses.empty()) {
7482 if (LangOpts.MicrosoftExt)
7483 Result += "__declspec(allocate(\".objc_nlclslist$B\")) \n";
7484 Result += "static struct _class_t *_OBJC_LABEL_NONLAZY_CLASS_$[] = {\n\t";
7485 for (unsigned i = 0, e = DefinedNonLazyClasses.size(); i < e; i++) {
7486 Result += "\t&OBJC_CLASS_$_"; Result += DefinedNonLazyClasses[i]->getNameAsString();
7487 Result += ",\n";
7488 }
7489 Result += "};\n";
7490 }
7491 }
7492
7493 if (CatDefCount > 0) {
7494 if (LangOpts.MicrosoftExt)
7495 Result += "__declspec(allocate(\".objc_catlist$B\")) ";
7496 Result += "static struct _category_t *L_OBJC_LABEL_CATEGORY_$ [";
7497 Result += llvm::utostr(CatDefCount); Result += "]";
7498 Result +=
7499 " __attribute__((used, section (\"__DATA, __objc_catlist,"
7500 "regular,no_dead_strip\")))= {\n";
7501 for (int i = 0; i < CatDefCount; i++) {
7502 Result += "\t&_OBJC_$_CATEGORY_";
7503 Result +=
7504 CategoryImplementation[i]->getClassInterface()->getNameAsString();
7505 Result += "_$_";
7506 Result += CategoryImplementation[i]->getNameAsString();
7507 Result += ",\n";
7508 }
7509 Result += "};\n";
7510 }
7511
7512 if (!DefinedNonLazyCategories.empty()) {
7513 if (LangOpts.MicrosoftExt)
7514 Result += "__declspec(allocate(\".objc_nlcatlist$B\")) \n";
7515 Result += "static struct _category_t *_OBJC_LABEL_NONLAZY_CATEGORY_$[] = {\n\t";
7516 for (unsigned i = 0, e = DefinedNonLazyCategories.size(); i < e; i++) {
7517 Result += "\t&_OBJC_$_CATEGORY_";
7518 Result +=
7519 DefinedNonLazyCategories[i]->getClassInterface()->getNameAsString();
7520 Result += "_$_";
7521 Result += DefinedNonLazyCategories[i]->getNameAsString();
7522 Result += ",\n";
7523 }
7524 Result += "};\n";
7525 }
7526 }
7527
WriteImageInfo(std::string & Result)7528 void RewriteModernObjC::WriteImageInfo(std::string &Result) {
7529 if (LangOpts.MicrosoftExt)
7530 Result += "__declspec(allocate(\".objc_imageinfo$B\")) \n";
7531
7532 Result += "static struct IMAGE_INFO { unsigned version; unsigned flag; } ";
7533 // version 0, ObjCABI is 2
7534 Result += "_OBJC_IMAGE_INFO = { 0, 2 };\n";
7535 }
7536
7537 /// RewriteObjCCategoryImplDecl - Rewrite metadata for each category
7538 /// implementation.
RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl * IDecl,std::string & Result)7539 void RewriteModernObjC::RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *IDecl,
7540 std::string &Result) {
7541 WriteModernMetadataDeclarations(Context, Result);
7542 ObjCInterfaceDecl *ClassDecl = IDecl->getClassInterface();
7543 // Find category declaration for this implementation.
7544 ObjCCategoryDecl *CDecl
7545 = ClassDecl->FindCategoryDeclaration(IDecl->getIdentifier());
7546
7547 std::string FullCategoryName = ClassDecl->getNameAsString();
7548 FullCategoryName += "_$_";
7549 FullCategoryName += CDecl->getNameAsString();
7550
7551 // Build _objc_method_list for class's instance methods if needed
7552 SmallVector<ObjCMethodDecl *, 32>
7553 InstanceMethods(IDecl->instmeth_begin(), IDecl->instmeth_end());
7554
7555 // If any of our property implementations have associated getters or
7556 // setters, produce metadata for them as well.
7557 for (ObjCImplDecl::propimpl_iterator Prop = IDecl->propimpl_begin(),
7558 PropEnd = IDecl->propimpl_end();
7559 Prop != PropEnd; ++Prop) {
7560 if (Prop->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
7561 continue;
7562 if (!Prop->getPropertyIvarDecl())
7563 continue;
7564 ObjCPropertyDecl *PD = Prop->getPropertyDecl();
7565 if (!PD)
7566 continue;
7567 if (ObjCMethodDecl *Getter = PD->getGetterMethodDecl())
7568 InstanceMethods.push_back(Getter);
7569 if (PD->isReadOnly())
7570 continue;
7571 if (ObjCMethodDecl *Setter = PD->getSetterMethodDecl())
7572 InstanceMethods.push_back(Setter);
7573 }
7574
7575 Write_method_list_t_initializer(*this, Context, Result, InstanceMethods,
7576 "_OBJC_$_CATEGORY_INSTANCE_METHODS_",
7577 FullCategoryName, true);
7578
7579 SmallVector<ObjCMethodDecl *, 32>
7580 ClassMethods(IDecl->classmeth_begin(), IDecl->classmeth_end());
7581
7582 Write_method_list_t_initializer(*this, Context, Result, ClassMethods,
7583 "_OBJC_$_CATEGORY_CLASS_METHODS_",
7584 FullCategoryName, true);
7585
7586 // Protocols referenced in class declaration?
7587 // Protocol's super protocol list
7588 std::vector<ObjCProtocolDecl *> RefedProtocols;
7589 for (ObjCInterfaceDecl::protocol_iterator I = CDecl->protocol_begin(),
7590 E = CDecl->protocol_end();
7591
7592 I != E; ++I) {
7593 RefedProtocols.push_back(*I);
7594 // Must write out all protocol definitions in current qualifier list,
7595 // and in their nested qualifiers before writing out current definition.
7596 RewriteObjCProtocolMetaData(*I, Result);
7597 }
7598
7599 Write_protocol_list_initializer(Context, Result,
7600 RefedProtocols,
7601 "_OBJC_CATEGORY_PROTOCOLS_$_",
7602 FullCategoryName);
7603
7604 // Protocol's property metadata.
7605 std::vector<ObjCPropertyDecl *> ClassProperties;
7606 for (ObjCContainerDecl::prop_iterator I = CDecl->prop_begin(),
7607 E = CDecl->prop_end(); I != E; ++I)
7608 ClassProperties.push_back(*I);
7609
7610 Write_prop_list_t_initializer(*this, Context, Result, ClassProperties,
7611 /* Container */IDecl,
7612 "_OBJC_$_PROP_LIST_",
7613 FullCategoryName);
7614
7615 Write_category_t(*this, Context, Result,
7616 CDecl,
7617 ClassDecl,
7618 InstanceMethods,
7619 ClassMethods,
7620 RefedProtocols,
7621 ClassProperties);
7622
7623 // Determine if this category is also "non-lazy".
7624 if (ImplementationIsNonLazy(IDecl))
7625 DefinedNonLazyCategories.push_back(CDecl);
7626
7627 }
7628
RewriteCategorySetupInitHook(std::string & Result)7629 void RewriteModernObjC::RewriteCategorySetupInitHook(std::string &Result) {
7630 int CatDefCount = CategoryImplementation.size();
7631 if (!CatDefCount)
7632 return;
7633 Result += "#pragma section(\".objc_inithooks$B\", long, read, write)\n";
7634 Result += "__declspec(allocate(\".objc_inithooks$B\")) ";
7635 Result += "static void *OBJC_CATEGORY_SETUP[] = {\n";
7636 for (int i = 0; i < CatDefCount; i++) {
7637 ObjCCategoryImplDecl *IDecl = CategoryImplementation[i];
7638 ObjCCategoryDecl *CatDecl= IDecl->getCategoryDecl();
7639 ObjCInterfaceDecl *ClassDecl = IDecl->getClassInterface();
7640 Result += "\t(void *)&OBJC_CATEGORY_SETUP_$_";
7641 Result += ClassDecl->getName();
7642 Result += "_$_";
7643 Result += CatDecl->getName();
7644 Result += ",\n";
7645 }
7646 Result += "};\n";
7647 }
7648
7649 // RewriteObjCMethodsMetaData - Rewrite methods metadata for instance or
7650 /// class methods.
7651 template<typename MethodIterator>
RewriteObjCMethodsMetaData(MethodIterator MethodBegin,MethodIterator MethodEnd,bool IsInstanceMethod,StringRef prefix,StringRef ClassName,std::string & Result)7652 void RewriteModernObjC::RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
7653 MethodIterator MethodEnd,
7654 bool IsInstanceMethod,
7655 StringRef prefix,
7656 StringRef ClassName,
7657 std::string &Result) {
7658 if (MethodBegin == MethodEnd) return;
7659
7660 if (!objc_impl_method) {
7661 /* struct _objc_method {
7662 SEL _cmd;
7663 char *method_types;
7664 void *_imp;
7665 }
7666 */
7667 Result += "\nstruct _objc_method {\n";
7668 Result += "\tSEL _cmd;\n";
7669 Result += "\tchar *method_types;\n";
7670 Result += "\tvoid *_imp;\n";
7671 Result += "};\n";
7672
7673 objc_impl_method = true;
7674 }
7675
7676 // Build _objc_method_list for class's methods if needed
7677
7678 /* struct {
7679 struct _objc_method_list *next_method;
7680 int method_count;
7681 struct _objc_method method_list[];
7682 }
7683 */
7684 unsigned NumMethods = std::distance(MethodBegin, MethodEnd);
7685 Result += "\n";
7686 if (LangOpts.MicrosoftExt) {
7687 if (IsInstanceMethod)
7688 Result += "__declspec(allocate(\".inst_meth$B\")) ";
7689 else
7690 Result += "__declspec(allocate(\".cls_meth$B\")) ";
7691 }
7692 Result += "static struct {\n";
7693 Result += "\tstruct _objc_method_list *next_method;\n";
7694 Result += "\tint method_count;\n";
7695 Result += "\tstruct _objc_method method_list[";
7696 Result += utostr(NumMethods);
7697 Result += "];\n} _OBJC_";
7698 Result += prefix;
7699 Result += IsInstanceMethod ? "INSTANCE" : "CLASS";
7700 Result += "_METHODS_";
7701 Result += ClassName;
7702 Result += " __attribute__ ((used, section (\"__OBJC, __";
7703 Result += IsInstanceMethod ? "inst" : "cls";
7704 Result += "_meth\")))= ";
7705 Result += "{\n\t0, " + utostr(NumMethods) + "\n";
7706
7707 Result += "\t,{{(SEL)\"";
7708 Result += (*MethodBegin)->getSelector().getAsString().c_str();
7709 std::string MethodTypeString;
7710 Context->getObjCEncodingForMethodDecl(*MethodBegin, MethodTypeString);
7711 Result += "\", \"";
7712 Result += MethodTypeString;
7713 Result += "\", (void *)";
7714 Result += MethodInternalNames[*MethodBegin];
7715 Result += "}\n";
7716 for (++MethodBegin; MethodBegin != MethodEnd; ++MethodBegin) {
7717 Result += "\t ,{(SEL)\"";
7718 Result += (*MethodBegin)->getSelector().getAsString().c_str();
7719 std::string MethodTypeString;
7720 Context->getObjCEncodingForMethodDecl(*MethodBegin, MethodTypeString);
7721 Result += "\", \"";
7722 Result += MethodTypeString;
7723 Result += "\", (void *)";
7724 Result += MethodInternalNames[*MethodBegin];
7725 Result += "}\n";
7726 }
7727 Result += "\t }\n};\n";
7728 }
7729
RewriteObjCIvarRefExpr(ObjCIvarRefExpr * IV)7730 Stmt *RewriteModernObjC::RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV) {
7731 SourceRange OldRange = IV->getSourceRange();
7732 Expr *BaseExpr = IV->getBase();
7733
7734 // Rewrite the base, but without actually doing replaces.
7735 {
7736 DisableReplaceStmtScope S(*this);
7737 BaseExpr = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(BaseExpr));
7738 IV->setBase(BaseExpr);
7739 }
7740
7741 ObjCIvarDecl *D = IV->getDecl();
7742
7743 Expr *Replacement = IV;
7744
7745 if (BaseExpr->getType()->isObjCObjectPointerType()) {
7746 const ObjCInterfaceType *iFaceDecl =
7747 dyn_cast<ObjCInterfaceType>(BaseExpr->getType()->getPointeeType());
7748 assert(iFaceDecl && "RewriteObjCIvarRefExpr - iFaceDecl is null");
7749 // lookup which class implements the instance variable.
7750 ObjCInterfaceDecl *clsDeclared = 0;
7751 iFaceDecl->getDecl()->lookupInstanceVariable(D->getIdentifier(),
7752 clsDeclared);
7753 assert(clsDeclared && "RewriteObjCIvarRefExpr(): Can't find class");
7754
7755 // Build name of symbol holding ivar offset.
7756 std::string IvarOffsetName;
7757 if (D->isBitField())
7758 ObjCIvarBitfieldGroupOffset(D, IvarOffsetName);
7759 else
7760 WriteInternalIvarName(clsDeclared, D, IvarOffsetName);
7761
7762 ReferencedIvars[clsDeclared].insert(D);
7763
7764 // cast offset to "char *".
7765 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context,
7766 Context->getPointerType(Context->CharTy),
7767 CK_BitCast,
7768 BaseExpr);
7769 VarDecl *NewVD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
7770 SourceLocation(), &Context->Idents.get(IvarOffsetName),
7771 Context->UnsignedLongTy, 0, SC_Extern);
7772 DeclRefExpr *DRE = new (Context) DeclRefExpr(NewVD, false,
7773 Context->UnsignedLongTy, VK_LValue,
7774 SourceLocation());
7775 BinaryOperator *addExpr =
7776 new (Context) BinaryOperator(castExpr, DRE, BO_Add,
7777 Context->getPointerType(Context->CharTy),
7778 VK_RValue, OK_Ordinary, SourceLocation(), false);
7779 // Don't forget the parens to enforce the proper binding.
7780 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(),
7781 SourceLocation(),
7782 addExpr);
7783 QualType IvarT = D->getType();
7784 if (D->isBitField())
7785 IvarT = GetGroupRecordTypeForObjCIvarBitfield(D);
7786
7787 if (!isa<TypedefType>(IvarT) && IvarT->isRecordType()) {
7788 RecordDecl *RD = IvarT->getAs<RecordType>()->getDecl();
7789 RD = RD->getDefinition();
7790 if (RD && !RD->getDeclName().getAsIdentifierInfo()) {
7791 // decltype(((Foo_IMPL*)0)->bar) *
7792 ObjCContainerDecl *CDecl =
7793 dyn_cast<ObjCContainerDecl>(D->getDeclContext());
7794 // ivar in class extensions requires special treatment.
7795 if (ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CDecl))
7796 CDecl = CatDecl->getClassInterface();
7797 std::string RecName = CDecl->getName();
7798 RecName += "_IMPL";
7799 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
7800 SourceLocation(), SourceLocation(),
7801 &Context->Idents.get(RecName.c_str()));
7802 QualType PtrStructIMPL = Context->getPointerType(Context->getTagDeclType(RD));
7803 unsigned UnsignedIntSize =
7804 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
7805 Expr *Zero = IntegerLiteral::Create(*Context,
7806 llvm::APInt(UnsignedIntSize, 0),
7807 Context->UnsignedIntTy, SourceLocation());
7808 Zero = NoTypeInfoCStyleCastExpr(Context, PtrStructIMPL, CK_BitCast, Zero);
7809 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
7810 Zero);
7811 FieldDecl *FD = FieldDecl::Create(*Context, 0, SourceLocation(),
7812 SourceLocation(),
7813 &Context->Idents.get(D->getNameAsString()),
7814 IvarT, 0,
7815 /*BitWidth=*/0, /*Mutable=*/true,
7816 ICIS_NoInit);
7817 MemberExpr *ME = new (Context) MemberExpr(PE, true, FD, SourceLocation(),
7818 FD->getType(), VK_LValue,
7819 OK_Ordinary);
7820 IvarT = Context->getDecltypeType(ME, ME->getType());
7821 }
7822 }
7823 convertObjCTypeToCStyleType(IvarT);
7824 QualType castT = Context->getPointerType(IvarT);
7825
7826 castExpr = NoTypeInfoCStyleCastExpr(Context,
7827 castT,
7828 CK_BitCast,
7829 PE);
7830
7831
7832 Expr *Exp = new (Context) UnaryOperator(castExpr, UO_Deref, IvarT,
7833 VK_LValue, OK_Ordinary,
7834 SourceLocation());
7835 PE = new (Context) ParenExpr(OldRange.getBegin(),
7836 OldRange.getEnd(),
7837 Exp);
7838
7839 if (D->isBitField()) {
7840 FieldDecl *FD = FieldDecl::Create(*Context, 0, SourceLocation(),
7841 SourceLocation(),
7842 &Context->Idents.get(D->getNameAsString()),
7843 D->getType(), 0,
7844 /*BitWidth=*/D->getBitWidth(),
7845 /*Mutable=*/true,
7846 ICIS_NoInit);
7847 MemberExpr *ME = new (Context) MemberExpr(PE, /*isArrow*/false, FD, SourceLocation(),
7848 FD->getType(), VK_LValue,
7849 OK_Ordinary);
7850 Replacement = ME;
7851
7852 }
7853 else
7854 Replacement = PE;
7855 }
7856
7857 ReplaceStmtWithRange(IV, Replacement, OldRange);
7858 return Replacement;
7859 }
7860