1//===-- RewriteModernObjC.cpp - Playground for the code rewriter ----------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// Hacks and fun related to the code rewriter.
10//
11//===----------------------------------------------------------------------===//
12
13#include "clang/Rewrite/Frontend/ASTConsumers.h"
14#include "clang/AST/AST.h"
15#include "clang/AST/ASTConsumer.h"
16#include "clang/AST/Attr.h"
17#include "clang/AST/ParentMap.h"
18#include "clang/Basic/CharInfo.h"
19#include "clang/Basic/Diagnostic.h"
20#include "clang/Basic/IdentifierTable.h"
21#include "clang/Basic/SourceManager.h"
22#include "clang/Basic/TargetInfo.h"
23#include "clang/Config/config.h"
24#include "clang/Lex/Lexer.h"
25#include "clang/Rewrite/Core/Rewriter.h"
26#include "llvm/ADT/DenseSet.h"
27#include "llvm/ADT/SetVector.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#include <memory>
33
34#if CLANG_ENABLE_OBJC_REWRITER
35
36using namespace clang;
37using llvm::utostr;
38
39namespace {
40 class RewriteModernObjC : public ASTConsumer {
41 protected:
42
43 enum {
44 BLOCK_FIELD_IS_OBJECT = 3, /* id, NSObject, __attribute__((NSObject)),
45 block, ... */
46 BLOCK_FIELD_IS_BLOCK = 7, /* a block variable */
47 BLOCK_FIELD_IS_BYREF = 8, /* the on stack structure holding the
48 __block variable */
49 BLOCK_FIELD_IS_WEAK = 16, /* declared __weak, only used in byref copy
50 helpers */
51 BLOCK_BYREF_CALLER = 128, /* called from __block (byref) copy/dispose
52 support routines */
53 BLOCK_BYREF_CURRENT_MAX = 256
54 };
55
56 enum {
57 BLOCK_NEEDS_FREE = (1 << 24),
58 BLOCK_HAS_COPY_DISPOSE = (1 << 25),
59 BLOCK_HAS_CXX_OBJ = (1 << 26),
60 BLOCK_IS_GC = (1 << 27),
61 BLOCK_IS_GLOBAL = (1 << 28),
62 BLOCK_HAS_DESCRIPTOR = (1 << 29)
63 };
64
65 Rewriter Rewrite;
66 DiagnosticsEngine &Diags;
67 const LangOptions &LangOpts;
68 ASTContext *Context;
69 SourceManager *SM;
70 TranslationUnitDecl *TUDecl;
71 FileID MainFileID;
72 const char *MainFileStart, *MainFileEnd;
73 Stmt *CurrentBody;
74 ParentMap *PropParentMap; // created lazily.
75 std::string InFileName;
76 std::unique_ptr<raw_ostream> OutFile;
77 std::string Preamble;
78
79 TypeDecl *ProtocolTypeDecl;
80 VarDecl *GlobalVarDecl;
81 Expr *GlobalConstructionExp;
82 unsigned RewriteFailedDiag;
83 unsigned GlobalBlockRewriteFailedDiag;
84 // ObjC string constant support.
85 unsigned NumObjCStringLiterals;
86 VarDecl *ConstantStringClassReference;
87 RecordDecl *NSStringRecord;
88
89 // ObjC foreach break/continue generation support.
90 int BcLabelCount;
91
92 unsigned TryFinallyContainsReturnDiag;
93 // Needed for super.
94 ObjCMethodDecl *CurMethodDef;
95 RecordDecl *SuperStructDecl;
96 RecordDecl *ConstantStringDecl;
97
98 FunctionDecl *MsgSendFunctionDecl;
99 FunctionDecl *MsgSendSuperFunctionDecl;
100 FunctionDecl *MsgSendStretFunctionDecl;
101 FunctionDecl *MsgSendSuperStretFunctionDecl;
102 FunctionDecl *MsgSendFpretFunctionDecl;
103 FunctionDecl *GetClassFunctionDecl;
104 FunctionDecl *GetMetaClassFunctionDecl;
105 FunctionDecl *GetSuperClassFunctionDecl;
106 FunctionDecl *SelGetUidFunctionDecl;
107 FunctionDecl *CFStringFunctionDecl;
108 FunctionDecl *SuperConstructorFunctionDecl;
109 FunctionDecl *CurFunctionDef;
110
111 /* Misc. containers needed for meta-data rewrite. */
112 SmallVector<ObjCImplementationDecl *, 8> ClassImplementation;
113 SmallVector<ObjCCategoryImplDecl *, 8> CategoryImplementation;
114 llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCSynthesizedStructs;
115 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> ObjCSynthesizedProtocols;
116 llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCWrittenInterfaces;
117 llvm::SmallPtrSet<TagDecl*, 32> GlobalDefinedTags;
118 SmallVector<ObjCInterfaceDecl*, 32> ObjCInterfacesSeen;
119 /// DefinedNonLazyClasses - List of defined "non-lazy" classes.
120 SmallVector<ObjCInterfaceDecl*, 8> DefinedNonLazyClasses;
121
122 /// DefinedNonLazyCategories - List of defined "non-lazy" categories.
123 SmallVector<ObjCCategoryDecl *, 8> DefinedNonLazyCategories;
124
125 SmallVector<Stmt *, 32> Stmts;
126 SmallVector<int, 8> ObjCBcLabelNo;
127 // Remember all the @protocol(<expr>) expressions.
128 llvm::SmallPtrSet<ObjCProtocolDecl *, 32> ProtocolExprDecls;
129
130 llvm::DenseSet<uint64_t> CopyDestroyCache;
131
132 // Block expressions.
133 SmallVector<BlockExpr *, 32> Blocks;
134 SmallVector<int, 32> InnerDeclRefsCount;
135 SmallVector<DeclRefExpr *, 32> InnerDeclRefs;
136
137 SmallVector<DeclRefExpr *, 32> BlockDeclRefs;
138
139 // Block related declarations.
140 SmallVector<ValueDecl *, 8> BlockByCopyDecls;
141 llvm::SmallPtrSet<ValueDecl *, 8> BlockByCopyDeclsPtrSet;
142 SmallVector<ValueDecl *, 8> BlockByRefDecls;
143 llvm::SmallPtrSet<ValueDecl *, 8> BlockByRefDeclsPtrSet;
144 llvm::DenseMap<ValueDecl *, unsigned> BlockByRefDeclNo;
145 llvm::SmallPtrSet<ValueDecl *, 8> ImportedBlockDecls;
146 llvm::SmallPtrSet<VarDecl *, 8> ImportedLocalExternalDecls;
147
148 llvm::DenseMap<BlockExpr *, std::string> RewrittenBlockExprs;
149 llvm::DenseMap<ObjCInterfaceDecl *,
150 llvm::SmallSetVector<ObjCIvarDecl *, 8> > ReferencedIvars;
151
152 // ivar bitfield grouping containers
153 llvm::DenseSet<const ObjCInterfaceDecl *> ObjCInterefaceHasBitfieldGroups;
154 llvm::DenseMap<const ObjCIvarDecl* , unsigned> IvarGroupNumber;
155 // This container maps an <class, group number for ivar> tuple to the type
156 // of the struct where the bitfield belongs.
157 llvm::DenseMap<std::pair<const ObjCInterfaceDecl*, unsigned>, QualType> GroupRecordType;
158 SmallVector<FunctionDecl*, 32> FunctionDefinitionsSeen;
159
160 // This maps an original source AST to it's rewritten form. This allows
161 // us to avoid rewriting the same node twice (which is very uncommon).
162 // This is needed to support some of the exotic property rewriting.
163 llvm::DenseMap<Stmt *, Stmt *> ReplacedNodes;
164
165 // Needed for header files being rewritten
166 bool IsHeader;
167 bool SilenceRewriteMacroWarning;
168 bool GenerateLineInfo;
169 bool objc_impl_method;
170
171 bool DisableReplaceStmt;
172 class DisableReplaceStmtScope {
173 RewriteModernObjC &R;
174 bool SavedValue;
175
176 public:
177 DisableReplaceStmtScope(RewriteModernObjC &R)
178 : R(R), SavedValue(R.DisableReplaceStmt) {
179 R.DisableReplaceStmt = true;
180 }
181 ~DisableReplaceStmtScope() {
182 R.DisableReplaceStmt = SavedValue;
183 }
184 };
185 void InitializeCommon(ASTContext &context);
186
187 public:
188 llvm::DenseMap<ObjCMethodDecl*, std::string> MethodInternalNames;
189
190 // Top Level Driver code.
191 bool HandleTopLevelDecl(DeclGroupRef D) override {
192 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
193 if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(Val: *I)) {
194 if (!Class->isThisDeclarationADefinition()) {
195 RewriteForwardClassDecl(D);
196 break;
197 } else {
198 // Keep track of all interface declarations seen.
199 ObjCInterfacesSeen.push_back(Elt: Class);
200 break;
201 }
202 }
203
204 if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>(Val: *I)) {
205 if (!Proto->isThisDeclarationADefinition()) {
206 RewriteForwardProtocolDecl(D);
207 break;
208 }
209 }
210
211 if (FunctionDecl *FDecl = dyn_cast<FunctionDecl>(Val: *I)) {
212 // Under modern abi, we cannot translate body of the function
213 // yet until all class extensions and its implementation is seen.
214 // This is because they may introduce new bitfields which must go
215 // into their grouping struct.
216 if (FDecl->isThisDeclarationADefinition() &&
217 // Not c functions defined inside an objc container.
218 !FDecl->isTopLevelDeclInObjCContainer()) {
219 FunctionDefinitionsSeen.push_back(Elt: FDecl);
220 break;
221 }
222 }
223 HandleTopLevelSingleDecl(D: *I);
224 }
225 return true;
226 }
227
228 void HandleTopLevelDeclInObjCContainer(DeclGroupRef D) override {
229 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
230 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(Val: *I)) {
231 if (isTopLevelBlockPointerType(T: TD->getUnderlyingType()))
232 RewriteBlockPointerDecl(TD);
233 else if (TD->getUnderlyingType()->isFunctionPointerType())
234 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
235 else
236 RewriteObjCQualifiedInterfaceTypes(TD);
237 }
238 }
239 }
240
241 void HandleTopLevelSingleDecl(Decl *D);
242 void HandleDeclInMainFile(Decl *D);
243 RewriteModernObjC(std::string inFile, std::unique_ptr<raw_ostream> OS,
244 DiagnosticsEngine &D, const LangOptions &LOpts,
245 bool silenceMacroWarn, bool LineInfo);
246
247 ~RewriteModernObjC() override {}
248
249 void HandleTranslationUnit(ASTContext &C) override;
250
251 void ReplaceStmt(Stmt *Old, Stmt *New) {
252 ReplaceStmtWithRange(Old, New, SrcRange: Old->getSourceRange());
253 }
254
255 void ReplaceStmtWithRange(Stmt *Old, Stmt *New, SourceRange SrcRange) {
256 assert(Old != nullptr && New != nullptr && "Expected non-null Stmt's");
257
258 Stmt *ReplacingStmt = ReplacedNodes[Old];
259 if (ReplacingStmt)
260 return; // We can't rewrite the same node twice.
261
262 if (DisableReplaceStmt)
263 return;
264
265 // Measure the old text.
266 int Size = Rewrite.getRangeSize(Range: SrcRange);
267 if (Size == -1) {
268 Diags.Report(Loc: Context->getFullLoc(Loc: Old->getBeginLoc()), DiagID: RewriteFailedDiag)
269 << Old->getSourceRange();
270 return;
271 }
272 // Get the new text.
273 std::string SStr;
274 llvm::raw_string_ostream S(SStr);
275 New->printPretty(OS&: S, Helper: nullptr, Policy: PrintingPolicy(LangOpts));
276 const std::string &Str = S.str();
277
278 // If replacement succeeded or warning disabled return with no warning.
279 if (!Rewrite.ReplaceText(Start: SrcRange.getBegin(), OrigLength: Size, NewStr: Str)) {
280 ReplacedNodes[Old] = New;
281 return;
282 }
283 if (SilenceRewriteMacroWarning)
284 return;
285 Diags.Report(Loc: Context->getFullLoc(Loc: Old->getBeginLoc()), DiagID: RewriteFailedDiag)
286 << Old->getSourceRange();
287 }
288
289 void InsertText(SourceLocation Loc, StringRef Str,
290 bool InsertAfter = true) {
291 // If insertion succeeded or warning disabled return with no warning.
292 if (!Rewrite.InsertText(Loc, Str, InsertAfter) ||
293 SilenceRewriteMacroWarning)
294 return;
295
296 Diags.Report(Loc: Context->getFullLoc(Loc), DiagID: RewriteFailedDiag);
297 }
298
299 void ReplaceText(SourceLocation Start, unsigned OrigLength,
300 StringRef Str) {
301 // If removal succeeded or warning disabled return with no warning.
302 if (!Rewrite.ReplaceText(Start, OrigLength, NewStr: Str) ||
303 SilenceRewriteMacroWarning)
304 return;
305
306 Diags.Report(Loc: Context->getFullLoc(Loc: Start), DiagID: RewriteFailedDiag);
307 }
308
309 // Syntactic Rewriting.
310 void RewriteRecordBody(RecordDecl *RD);
311 void RewriteInclude();
312 void RewriteLineDirective(const Decl *D);
313 void ConvertSourceLocationToLineDirective(SourceLocation Loc,
314 std::string &LineString);
315 void RewriteForwardClassDecl(DeclGroupRef D);
316 void RewriteForwardClassDecl(const SmallVectorImpl<Decl *> &DG);
317 void RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
318 const std::string &typedefString);
319 void RewriteImplementations();
320 void RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
321 ObjCImplementationDecl *IMD,
322 ObjCCategoryImplDecl *CID);
323 void RewriteInterfaceDecl(ObjCInterfaceDecl *Dcl);
324 void RewriteImplementationDecl(Decl *Dcl);
325 void RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
326 ObjCMethodDecl *MDecl, std::string &ResultStr);
327 void RewriteTypeIntoString(QualType T, std::string &ResultStr,
328 const FunctionType *&FPRetType);
329 void RewriteByRefString(std::string &ResultStr, const std::string &Name,
330 ValueDecl *VD, bool def=false);
331 void RewriteCategoryDecl(ObjCCategoryDecl *Dcl);
332 void RewriteProtocolDecl(ObjCProtocolDecl *Dcl);
333 void RewriteForwardProtocolDecl(DeclGroupRef D);
334 void RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG);
335 void RewriteMethodDeclaration(ObjCMethodDecl *Method);
336 void RewriteProperty(ObjCPropertyDecl *prop);
337 void RewriteFunctionDecl(FunctionDecl *FD);
338 void RewriteBlockPointerType(std::string& Str, QualType Type);
339 void RewriteBlockPointerTypeVariable(std::string& Str, ValueDecl *VD);
340 void RewriteBlockLiteralFunctionDecl(FunctionDecl *FD);
341 void RewriteObjCQualifiedInterfaceTypes(Decl *Dcl);
342 void RewriteTypeOfDecl(VarDecl *VD);
343 void RewriteObjCQualifiedInterfaceTypes(Expr *E);
344
345 std::string getIvarAccessString(ObjCIvarDecl *D);
346
347 // Expression Rewriting.
348 Stmt *RewriteFunctionBodyOrGlobalInitializer(Stmt *S);
349 Stmt *RewriteAtEncode(ObjCEncodeExpr *Exp);
350 Stmt *RewritePropertyOrImplicitGetter(PseudoObjectExpr *Pseudo);
351 Stmt *RewritePropertyOrImplicitSetter(PseudoObjectExpr *Pseudo);
352 Stmt *RewriteAtSelector(ObjCSelectorExpr *Exp);
353 Stmt *RewriteMessageExpr(ObjCMessageExpr *Exp);
354 Stmt *RewriteObjCStringLiteral(ObjCStringLiteral *Exp);
355 Stmt *RewriteObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Exp);
356 Stmt *RewriteObjCBoxedExpr(ObjCBoxedExpr *Exp);
357 Stmt *RewriteObjCArrayLiteralExpr(ObjCArrayLiteral *Exp);
358 Stmt *RewriteObjCDictionaryLiteralExpr(ObjCDictionaryLiteral *Exp);
359 Stmt *RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp);
360 Stmt *RewriteObjCTryStmt(ObjCAtTryStmt *S);
361 Stmt *RewriteObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S);
362 Stmt *RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S);
363 Stmt *RewriteObjCThrowStmt(ObjCAtThrowStmt *S);
364 Stmt *RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
365 SourceLocation OrigEnd);
366 Stmt *RewriteBreakStmt(BreakStmt *S);
367 Stmt *RewriteContinueStmt(ContinueStmt *S);
368 void RewriteCastExpr(CStyleCastExpr *CE);
369 void RewriteImplicitCastObjCExpr(CastExpr *IE);
370
371 // Computes ivar bitfield group no.
372 unsigned ObjCIvarBitfieldGroupNo(ObjCIvarDecl *IV);
373 // Names field decl. for ivar bitfield group.
374 void ObjCIvarBitfieldGroupDecl(ObjCIvarDecl *IV, std::string &Result);
375 // Names struct type for ivar bitfield group.
376 void ObjCIvarBitfieldGroupType(ObjCIvarDecl *IV, std::string &Result);
377 // Names symbol for ivar bitfield group field offset.
378 void ObjCIvarBitfieldGroupOffset(ObjCIvarDecl *IV, std::string &Result);
379 // Given an ivar bitfield, it builds (or finds) its group record type.
380 QualType GetGroupRecordTypeForObjCIvarBitfield(ObjCIvarDecl *IV);
381 QualType SynthesizeBitfieldGroupStructType(
382 ObjCIvarDecl *IV,
383 SmallVectorImpl<ObjCIvarDecl *> &IVars);
384
385 // Block rewriting.
386 void RewriteBlocksInFunctionProtoType(QualType funcType, NamedDecl *D);
387
388 // Block specific rewrite rules.
389 void RewriteBlockPointerDecl(NamedDecl *VD);
390 void RewriteByRefVar(VarDecl *VD, bool firstDecl, bool lastDecl);
391 Stmt *RewriteBlockDeclRefExpr(DeclRefExpr *VD);
392 Stmt *RewriteLocalVariableExternalStorage(DeclRefExpr *DRE);
393 void RewriteBlockPointerFunctionArgs(FunctionDecl *FD);
394
395 void RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
396 std::string &Result);
397
398 void RewriteObjCFieldDecl(FieldDecl *fieldDecl, std::string &Result);
399 bool IsTagDefinedInsideClass(ObjCContainerDecl *IDecl, TagDecl *Tag,
400 bool &IsNamedDefinition);
401 void RewriteLocallyDefinedNamedAggregates(FieldDecl *fieldDecl,
402 std::string &Result);
403
404 bool RewriteObjCFieldDeclType(QualType &Type, std::string &Result);
405
406 void RewriteIvarOffsetSymbols(ObjCInterfaceDecl *CDecl,
407 std::string &Result);
408
409 void Initialize(ASTContext &context) override;
410
411 // Misc. AST transformation routines. Sometimes they end up calling
412 // rewriting routines on the new ASTs.
413 CallExpr *SynthesizeCallToFunctionDecl(FunctionDecl *FD,
414 ArrayRef<Expr *> Args,
415 SourceLocation StartLoc=SourceLocation(),
416 SourceLocation EndLoc=SourceLocation());
417
418 Expr *SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
419 QualType returnType,
420 SmallVectorImpl<QualType> &ArgTypes,
421 SmallVectorImpl<Expr*> &MsgExprs,
422 ObjCMethodDecl *Method);
423
424 Stmt *SynthMessageExpr(ObjCMessageExpr *Exp,
425 SourceLocation StartLoc=SourceLocation(),
426 SourceLocation EndLoc=SourceLocation());
427
428 void SynthCountByEnumWithState(std::string &buf);
429 void SynthMsgSendFunctionDecl();
430 void SynthMsgSendSuperFunctionDecl();
431 void SynthMsgSendStretFunctionDecl();
432 void SynthMsgSendFpretFunctionDecl();
433 void SynthMsgSendSuperStretFunctionDecl();
434 void SynthGetClassFunctionDecl();
435 void SynthGetMetaClassFunctionDecl();
436 void SynthGetSuperClassFunctionDecl();
437 void SynthSelGetUidFunctionDecl();
438 void SynthSuperConstructorFunctionDecl();
439
440 // Rewriting metadata
441 template<typename MethodIterator>
442 void RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
443 MethodIterator MethodEnd,
444 bool IsInstanceMethod,
445 StringRef prefix,
446 StringRef ClassName,
447 std::string &Result);
448 void RewriteObjCProtocolMetaData(ObjCProtocolDecl *Protocol,
449 std::string &Result);
450 void RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
451 std::string &Result);
452 void RewriteClassSetupInitHook(std::string &Result);
453
454 void RewriteMetaDataIntoBuffer(std::string &Result);
455 void WriteImageInfo(std::string &Result);
456 void RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *CDecl,
457 std::string &Result);
458 void RewriteCategorySetupInitHook(std::string &Result);
459
460 // Rewriting ivar
461 void RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
462 std::string &Result);
463 Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV);
464
465
466 std::string SynthesizeByrefCopyDestroyHelper(VarDecl *VD, int flag);
467 std::string SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
468 StringRef funcName, std::string Tag);
469 std::string SynthesizeBlockFunc(BlockExpr *CE, int i,
470 StringRef funcName, std::string Tag);
471 std::string SynthesizeBlockImpl(BlockExpr *CE,
472 std::string Tag, std::string Desc);
473 std::string SynthesizeBlockDescriptor(std::string DescTag,
474 std::string ImplTag,
475 int i, StringRef funcName,
476 unsigned hasCopy);
477 Stmt *SynthesizeBlockCall(CallExpr *Exp, const Expr* BlockExp);
478 void SynthesizeBlockLiterals(SourceLocation FunLocStart,
479 StringRef FunName);
480 FunctionDecl *SynthBlockInitFunctionDecl(StringRef name);
481 Stmt *SynthBlockInitExpr(BlockExpr *Exp,
482 const SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs);
483
484 // Misc. helper routines.
485 QualType getProtocolType();
486 void WarnAboutReturnGotoStmts(Stmt *S);
487 void CheckFunctionPointerDecl(QualType dType, NamedDecl *ND);
488 void InsertBlockLiteralsWithinFunction(FunctionDecl *FD);
489 void InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD);
490
491 bool IsDeclStmtInForeachHeader(DeclStmt *DS);
492 void CollectBlockDeclRefInfo(BlockExpr *Exp);
493 void GetBlockDeclRefExprs(Stmt *S);
494 void GetInnerBlockDeclRefExprs(Stmt *S,
495 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
496 llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts);
497
498 // We avoid calling Type::isBlockPointerType(), since it operates on the
499 // canonical type. We only care if the top-level type is a closure pointer.
500 bool isTopLevelBlockPointerType(QualType T) {
501 return isa<BlockPointerType>(Val: T);
502 }
503
504 /// convertBlockPointerToFunctionPointer - Converts a block-pointer type
505 /// to a function pointer type and upon success, returns true; false
506 /// otherwise.
507 bool convertBlockPointerToFunctionPointer(QualType &T) {
508 if (isTopLevelBlockPointerType(T)) {
509 const auto *BPT = T->castAs<BlockPointerType>();
510 T = Context->getPointerType(T: BPT->getPointeeType());
511 return true;
512 }
513 return false;
514 }
515
516 bool convertObjCTypeToCStyleType(QualType &T);
517
518 bool needToScanForQualifiers(QualType T);
519 QualType getSuperStructType();
520 QualType getConstantStringStructType();
521 QualType convertFunctionTypeOfBlocks(const FunctionType *FT);
522
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.
543 bool isObjCType(QualType T) {
544 if (!LangOpts.ObjC)
545 return false;
546
547 QualType OCT = Context->getCanonicalType(T).getUnqualifiedType();
548
549 if (OCT == Context->getCanonicalType(T: Context->getObjCIdType()) ||
550 OCT == Context->getCanonicalType(T: Context->getObjCClassType()))
551 return true;
552
553 if (const PointerType *PT = OCT->getAs<PointerType>()) {
554 if (isa<ObjCInterfaceType>(Val: PT->getPointeeType()) ||
555 PT->getPointeeType()->isObjCQualifiedIdType())
556 return true;
557 }
558 return false;
559 }
560
561 bool PointerTypeTakesAnyBlockArguments(QualType QT);
562 bool PointerTypeTakesAnyObjCQualifiedType(QualType QT);
563 void GetExtentOfArgList(const char *Name, const char *&LParen,
564 const char *&RParen);
565
566 void QuoteDoublequotes(std::string &From, std::string &To) {
567 for (unsigned i = 0; i < From.length(); i++) {
568 if (From[i] == '"')
569 To += "\\\"";
570 else
571 To += From[i];
572 }
573 }
574
575 QualType getSimpleFunctionType(QualType result,
576 ArrayRef<QualType> args,
577 bool variadic = false) {
578 if (result == Context->getObjCInstanceType())
579 result = Context->getObjCIdType();
580 FunctionProtoType::ExtProtoInfo fpi;
581 fpi.Variadic = variadic;
582 return Context->getFunctionType(ResultTy: result, Args: args, EPI: fpi);
583 }
584
585 // Helper function: create a CStyleCastExpr with trivial type source info.
586 CStyleCastExpr* NoTypeInfoCStyleCastExpr(ASTContext *Ctx, QualType Ty,
587 CastKind Kind, Expr *E) {
588 TypeSourceInfo *TInfo = Ctx->getTrivialTypeSourceInfo(T: Ty, Loc: SourceLocation());
589 return CStyleCastExpr::Create(Context: *Ctx, T: Ty, VK: VK_PRValue, K: Kind, Op: E, BasePath: nullptr,
590 FPO: FPOptionsOverride(), WrittenTy: TInfo,
591 L: SourceLocation(), R: SourceLocation());
592 }
593
594 bool ImplementationIsNonLazy(const ObjCImplDecl *OD) const {
595 const IdentifierInfo *II = &Context->Idents.get(Name: "load");
596 Selector LoadSel = Context->Selectors.getSelector(NumArgs: 0, IIV: &II);
597 return OD->getClassMethod(LoadSel) != nullptr;
598 }
599
600 StringLiteral *getStringLiteral(StringRef Str) {
601 QualType StrType = Context->getConstantArrayType(
602 EltTy: Context->CharTy, ArySize: llvm::APInt(32, Str.size() + 1), SizeExpr: nullptr,
603 ASM: ArraySizeModifier::Normal, IndexTypeQuals: 0);
604 return StringLiteral::Create(Ctx: *Context, Str, Kind: StringLiteralKind::Ordinary,
605 /*Pascal=*/false, Ty: StrType, Loc: SourceLocation());
606 }
607 };
608} // end anonymous namespace
609
610void RewriteModernObjC::RewriteBlocksInFunctionProtoType(QualType funcType,
611 NamedDecl *D) {
612 if (const FunctionProtoType *fproto
613 = dyn_cast<FunctionProtoType>(Val: funcType.IgnoreParens())) {
614 for (const auto &I : fproto->param_types())
615 if (isTopLevelBlockPointerType(T: I)) {
616 // All the args are checked/rewritten. Don't call twice!
617 RewriteBlockPointerDecl(VD: D);
618 break;
619 }
620 }
621}
622
623void RewriteModernObjC::CheckFunctionPointerDecl(QualType funcType, NamedDecl *ND) {
624 const PointerType *PT = funcType->getAs<PointerType>();
625 if (PT && PointerTypeTakesAnyBlockArguments(QT: funcType))
626 RewriteBlocksInFunctionProtoType(funcType: PT->getPointeeType(), D: ND);
627}
628
629static bool IsHeaderFile(const std::string &Filename) {
630 std::string::size_type DotPos = Filename.rfind(c: '.');
631
632 if (DotPos == std::string::npos) {
633 // no file extension
634 return false;
635 }
636
637 std::string Ext = Filename.substr(pos: DotPos + 1);
638 // C header: .h
639 // C++ header: .hh or .H;
640 return Ext == "h" || Ext == "hh" || Ext == "H";
641}
642
643RewriteModernObjC::RewriteModernObjC(std::string inFile,
644 std::unique_ptr<raw_ostream> OS,
645 DiagnosticsEngine &D,
646 const LangOptions &LOpts,
647 bool silenceMacroWarn, bool LineInfo)
648 : Diags(D), LangOpts(LOpts), InFileName(inFile), OutFile(std::move(OS)),
649 SilenceRewriteMacroWarning(silenceMacroWarn), GenerateLineInfo(LineInfo) {
650 IsHeader = IsHeaderFile(Filename: inFile);
651 RewriteFailedDiag = Diags.getCustomDiagID(L: DiagnosticsEngine::Warning,
652 FormatString: "rewriting sub-expression within a macro (may not be correct)");
653 // FIXME. This should be an error. But if block is not called, it is OK. And it
654 // may break including some headers.
655 GlobalBlockRewriteFailedDiag = Diags.getCustomDiagID(L: DiagnosticsEngine::Warning,
656 FormatString: "rewriting block literal declared in global scope is not implemented");
657
658 TryFinallyContainsReturnDiag = Diags.getCustomDiagID(
659 L: DiagnosticsEngine::Warning,
660 FormatString: "rewriter doesn't support user-specified control flow semantics "
661 "for @try/@finally (code may not execute properly)");
662}
663
664std::unique_ptr<ASTConsumer> clang::CreateModernObjCRewriter(
665 const std::string &InFile, std::unique_ptr<raw_ostream> OS,
666 DiagnosticsEngine &Diags, const LangOptions &LOpts,
667 bool SilenceRewriteMacroWarning, bool LineInfo) {
668 return std::make_unique<RewriteModernObjC>(args: InFile, args: std::move(OS), args&: Diags,
669 args: LOpts, args&: SilenceRewriteMacroWarning,
670 args&: LineInfo);
671}
672
673void RewriteModernObjC::InitializeCommon(ASTContext &context) {
674 Context = &context;
675 SM = &Context->getSourceManager();
676 TUDecl = Context->getTranslationUnitDecl();
677 MsgSendFunctionDecl = nullptr;
678 MsgSendSuperFunctionDecl = nullptr;
679 MsgSendStretFunctionDecl = nullptr;
680 MsgSendSuperStretFunctionDecl = nullptr;
681 MsgSendFpretFunctionDecl = nullptr;
682 GetClassFunctionDecl = nullptr;
683 GetMetaClassFunctionDecl = nullptr;
684 GetSuperClassFunctionDecl = nullptr;
685 SelGetUidFunctionDecl = nullptr;
686 CFStringFunctionDecl = nullptr;
687 ConstantStringClassReference = nullptr;
688 NSStringRecord = nullptr;
689 CurMethodDef = nullptr;
690 CurFunctionDef = nullptr;
691 GlobalVarDecl = nullptr;
692 GlobalConstructionExp = nullptr;
693 SuperStructDecl = nullptr;
694 ProtocolTypeDecl = nullptr;
695 ConstantStringDecl = nullptr;
696 BcLabelCount = 0;
697 SuperConstructorFunctionDecl = nullptr;
698 NumObjCStringLiterals = 0;
699 PropParentMap = nullptr;
700 CurrentBody = nullptr;
701 DisableReplaceStmt = false;
702 objc_impl_method = false;
703
704 // Get the ID and start/end of the main file.
705 MainFileID = SM->getMainFileID();
706 llvm::MemoryBufferRef MainBuf = SM->getBufferOrFake(FID: MainFileID);
707 MainFileStart = MainBuf.getBufferStart();
708 MainFileEnd = MainBuf.getBufferEnd();
709
710 Rewrite.setSourceMgr(SM&: Context->getSourceManager(), LO: Context->getLangOpts());
711}
712
713//===----------------------------------------------------------------------===//
714// Top Level Driver Code
715//===----------------------------------------------------------------------===//
716
717void RewriteModernObjC::HandleTopLevelSingleDecl(Decl *D) {
718 if (Diags.hasErrorOccurred())
719 return;
720
721 // Two cases: either the decl could be in the main file, or it could be in a
722 // #included file. If the former, rewrite it now. If the later, check to see
723 // if we rewrote the #include/#import.
724 SourceLocation Loc = D->getLocation();
725 Loc = SM->getExpansionLoc(Loc);
726
727 // If this is for a builtin, ignore it.
728 if (Loc.isInvalid()) return;
729
730 // Look for built-in declarations that we need to refer during the rewrite.
731 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Val: D)) {
732 RewriteFunctionDecl(FD);
733 } else if (VarDecl *FVD = dyn_cast<VarDecl>(Val: D)) {
734 // declared in <Foundation/NSString.h>
735 if (FVD->getName() == "_NSConstantStringClassReference") {
736 ConstantStringClassReference = FVD;
737 return;
738 }
739 } else if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(Val: D)) {
740 RewriteCategoryDecl(Dcl: CD);
741 } else if (ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(Val: D)) {
742 if (PD->isThisDeclarationADefinition())
743 RewriteProtocolDecl(Dcl: PD);
744 } else if (LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(Val: D)) {
745 // Recurse into linkage specifications
746 for (DeclContext::decl_iterator DI = LSD->decls_begin(),
747 DIEnd = LSD->decls_end();
748 DI != DIEnd; ) {
749 if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>(Val: (*DI))) {
750 if (!IFace->isThisDeclarationADefinition()) {
751 SmallVector<Decl *, 8> DG;
752 SourceLocation StartLoc = IFace->getBeginLoc();
753 do {
754 if (isa<ObjCInterfaceDecl>(Val: *DI) &&
755 !cast<ObjCInterfaceDecl>(Val: *DI)->isThisDeclarationADefinition() &&
756 StartLoc == (*DI)->getBeginLoc())
757 DG.push_back(Elt: *DI);
758 else
759 break;
760
761 ++DI;
762 } while (DI != DIEnd);
763 RewriteForwardClassDecl(DG);
764 continue;
765 }
766 else {
767 // Keep track of all interface declarations seen.
768 ObjCInterfacesSeen.push_back(Elt: IFace);
769 ++DI;
770 continue;
771 }
772 }
773
774 if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>(Val: (*DI))) {
775 if (!Proto->isThisDeclarationADefinition()) {
776 SmallVector<Decl *, 8> DG;
777 SourceLocation StartLoc = Proto->getBeginLoc();
778 do {
779 if (isa<ObjCProtocolDecl>(Val: *DI) &&
780 !cast<ObjCProtocolDecl>(Val: *DI)->isThisDeclarationADefinition() &&
781 StartLoc == (*DI)->getBeginLoc())
782 DG.push_back(Elt: *DI);
783 else
784 break;
785
786 ++DI;
787 } while (DI != DIEnd);
788 RewriteForwardProtocolDecl(DG);
789 continue;
790 }
791 }
792
793 HandleTopLevelSingleDecl(D: *DI);
794 ++DI;
795 }
796 }
797 // If we have a decl in the main file, see if we should rewrite it.
798 if (SM->isWrittenInMainFile(Loc))
799 return HandleDeclInMainFile(D);
800}
801
802//===----------------------------------------------------------------------===//
803// Syntactic (non-AST) Rewriting Code
804//===----------------------------------------------------------------------===//
805
806void RewriteModernObjC::RewriteInclude() {
807 SourceLocation LocStart = SM->getLocForStartOfFile(FID: MainFileID);
808 StringRef MainBuf = SM->getBufferData(FID: MainFileID);
809 const char *MainBufStart = MainBuf.begin();
810 const char *MainBufEnd = MainBuf.end();
811 size_t ImportLen = strlen(s: "import");
812
813 // Loop over the whole file, looking for includes.
814 for (const char *BufPtr = MainBufStart; BufPtr < MainBufEnd; ++BufPtr) {
815 if (*BufPtr == '#') {
816 if (++BufPtr == MainBufEnd)
817 return;
818 while (*BufPtr == ' ' || *BufPtr == '\t')
819 if (++BufPtr == MainBufEnd)
820 return;
821 if (!strncmp(s1: BufPtr, s2: "import", n: ImportLen)) {
822 // replace import with include
823 SourceLocation ImportLoc =
824 LocStart.getLocWithOffset(Offset: BufPtr-MainBufStart);
825 ReplaceText(Start: ImportLoc, OrigLength: ImportLen, Str: "include");
826 BufPtr += ImportLen;
827 }
828 }
829 }
830}
831
832static void WriteInternalIvarName(const ObjCInterfaceDecl *IDecl,
833 ObjCIvarDecl *IvarDecl, std::string &Result) {
834 Result += "OBJC_IVAR_$_";
835 Result += IDecl->getName();
836 Result += "$";
837 Result += IvarDecl->getName();
838}
839
840std::string
841RewriteModernObjC::getIvarAccessString(ObjCIvarDecl *D) {
842 const ObjCInterfaceDecl *ClassDecl = D->getContainingInterface();
843
844 // Build name of symbol holding ivar offset.
845 std::string IvarOffsetName;
846 if (D->isBitField())
847 ObjCIvarBitfieldGroupOffset(IV: D, Result&: IvarOffsetName);
848 else
849 WriteInternalIvarName(IDecl: ClassDecl, IvarDecl: D, Result&: IvarOffsetName);
850
851 std::string S = "(*(";
852 QualType IvarT = D->getType();
853 if (D->isBitField())
854 IvarT = GetGroupRecordTypeForObjCIvarBitfield(IV: D);
855
856 if (!IvarT->getAs<TypedefType>() && IvarT->isRecordType()) {
857 RecordDecl *RD = IvarT->castAs<RecordType>()->getDecl();
858 RD = RD->getDefinition();
859 if (RD && !RD->getDeclName().getAsIdentifierInfo()) {
860 // decltype(((Foo_IMPL*)0)->bar) *
861 auto *CDecl = cast<ObjCContainerDecl>(D->getDeclContext());
862 // ivar in class extensions requires special treatment.
863 if (ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CDecl))
864 CDecl = CatDecl->getClassInterface();
865 std::string RecName = std::string(CDecl->getName());
866 RecName += "_IMPL";
867 RecordDecl *RD = RecordDecl::Create(*Context, TagTypeKind::Struct, TUDecl,
868 SourceLocation(), SourceLocation(),
869 &Context->Idents.get(Name: RecName));
870 QualType PtrStructIMPL = Context->getPointerType(T: Context->getTagDeclType(RD));
871 unsigned UnsignedIntSize =
872 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
873 Expr *Zero = IntegerLiteral::Create(*Context,
874 llvm::APInt(UnsignedIntSize, 0),
875 Context->UnsignedIntTy, SourceLocation());
876 Zero = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: PtrStructIMPL, Kind: CK_BitCast, E: Zero);
877 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
878 Zero);
879 FieldDecl *FD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(),
880 IdLoc: SourceLocation(),
881 Id: &Context->Idents.get(D->getNameAsString()),
882 T: IvarT, TInfo: nullptr,
883 /*BitWidth=*/BW: nullptr, /*Mutable=*/true,
884 InitStyle: ICIS_NoInit);
885 MemberExpr *ME = MemberExpr::CreateImplicit(
886 C: *Context, Base: PE, IsArrow: true, MemberDecl: FD, T: FD->getType(), VK: VK_LValue, OK: OK_Ordinary);
887 IvarT = Context->getDecltypeType(e: ME, UnderlyingType: ME->getType());
888 }
889 }
890 convertObjCTypeToCStyleType(T&: IvarT);
891 QualType castT = Context->getPointerType(T: IvarT);
892 std::string TypeString(castT.getAsString(Policy: Context->getPrintingPolicy()));
893 S += TypeString;
894 S += ")";
895
896 // ((char *)self + IVAR_OFFSET_SYMBOL_NAME)
897 S += "((char *)self + ";
898 S += IvarOffsetName;
899 S += "))";
900 if (D->isBitField()) {
901 S += ".";
902 S += D->getNameAsString();
903 }
904 ReferencedIvars[const_cast<ObjCInterfaceDecl *>(ClassDecl)].insert(X: D);
905 return S;
906}
907
908/// mustSynthesizeSetterGetterMethod - returns true if setter or getter has not
909/// been found in the class implementation. In this case, it must be synthesized.
910static bool mustSynthesizeSetterGetterMethod(ObjCImplementationDecl *IMP,
911 ObjCPropertyDecl *PD,
912 bool getter) {
913 auto *OMD = IMP->getInstanceMethod(getter ? PD->getGetterName()
914 : PD->getSetterName());
915 return !OMD || OMD->isSynthesizedAccessorStub();
916}
917
918void RewriteModernObjC::RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
919 ObjCImplementationDecl *IMD,
920 ObjCCategoryImplDecl *CID) {
921 static bool objcGetPropertyDefined = false;
922 static bool objcSetPropertyDefined = false;
923 SourceLocation startGetterSetterLoc;
924
925 if (PID->getBeginLoc().isValid()) {
926 SourceLocation startLoc = PID->getBeginLoc();
927 InsertText(Loc: startLoc, Str: "// ");
928 const char *startBuf = SM->getCharacterData(SL: startLoc);
929 assert((*startBuf == '@') && "bogus @synthesize location");
930 const char *semiBuf = strchr(s: startBuf, c: ';');
931 assert((*semiBuf == ';') && "@synthesize: can't find ';'");
932 startGetterSetterLoc = startLoc.getLocWithOffset(Offset: semiBuf-startBuf+1);
933 } else
934 startGetterSetterLoc = IMD ? IMD->getEndLoc() : CID->getEndLoc();
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(IMP: IMD, PD, getter: true /*getter*/)) {
946 bool GenGetProperty =
947 !(Attributes & ObjCPropertyAttribute::kind_nonatomic) &&
948 (Attributes & (ObjCPropertyAttribute::kind_retain |
949 ObjCPropertyAttribute::kind_copy));
950 std::string Getr;
951 if (GenGetProperty && !objcGetPropertyDefined) {
952 objcGetPropertyDefined = true;
953 // FIXME. Is this attribute correct in all cases?
954 Getr = "\nextern \"C\" __declspec(dllimport) "
955 "id objc_getProperty(id, SEL, long, bool);\n";
956 }
957 RewriteObjCMethodDecl(IDecl: OID->getContainingInterface(),
958 MDecl: PID->getGetterMethodDecl(), ResultStr&: Getr);
959 Getr += "{ ";
960 // Synthesize an explicit cast to gain access to the ivar.
961 // See objc-act.c:objc_synthesize_new_getter() for details.
962 if (GenGetProperty) {
963 // return objc_getProperty(self, _cmd, offsetof(ClassDecl, OID), 1)
964 Getr += "typedef ";
965 const FunctionType *FPRetType = nullptr;
966 RewriteTypeIntoString(T: PID->getGetterMethodDecl()->getReturnType(), ResultStr&: Getr,
967 FPRetType);
968 Getr += " _TYPE";
969 if (FPRetType) {
970 Getr += ")"; // close the precedence "scope" for "*".
971
972 // Now, emit the argument types (if any).
973 if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(Val: FPRetType)){
974 Getr += "(";
975 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) {
976 if (i) Getr += ", ";
977 std::string ParamStr =
978 FT->getParamType(i).getAsString(Policy: Context->getPrintingPolicy());
979 Getr += ParamStr;
980 }
981 if (FT->isVariadic()) {
982 if (FT->getNumParams())
983 Getr += ", ";
984 Getr += "...";
985 }
986 Getr += ")";
987 } else
988 Getr += "()";
989 }
990 Getr += ";\n";
991 Getr += "return (_TYPE)";
992 Getr += "objc_getProperty(self, _cmd, ";
993 RewriteIvarOffsetComputation(ivar: OID, Result&: Getr);
994 Getr += ", 1)";
995 }
996 else
997 Getr += "return " + getIvarAccessString(D: OID);
998 Getr += "; }";
999 InsertText(Loc: startGetterSetterLoc, Str: Getr);
1000 }
1001
1002 if (PD->isReadOnly() ||
1003 !mustSynthesizeSetterGetterMethod(IMP: IMD, PD, getter: false /*setter*/))
1004 return;
1005
1006 // Generate the 'setter' function.
1007 std::string Setr;
1008 bool GenSetProperty = Attributes & (ObjCPropertyAttribute::kind_retain |
1009 ObjCPropertyAttribute::kind_copy);
1010 if (GenSetProperty && !objcSetPropertyDefined) {
1011 objcSetPropertyDefined = true;
1012 // FIXME. Is this attribute correct in all cases?
1013 Setr = "\nextern \"C\" __declspec(dllimport) "
1014 "void objc_setProperty (id, SEL, long, id, bool, bool);\n";
1015 }
1016
1017 RewriteObjCMethodDecl(IDecl: OID->getContainingInterface(),
1018 MDecl: PID->getSetterMethodDecl(), ResultStr&: Setr);
1019 Setr += "{ ";
1020 // Synthesize an explicit cast to initialize the ivar.
1021 // See objc-act.c:objc_synthesize_new_setter() for details.
1022 if (GenSetProperty) {
1023 Setr += "objc_setProperty (self, _cmd, ";
1024 RewriteIvarOffsetComputation(ivar: OID, Result&: Setr);
1025 Setr += ", (id)";
1026 Setr += PD->getName();
1027 Setr += ", ";
1028 if (Attributes & ObjCPropertyAttribute::kind_nonatomic)
1029 Setr += "0, ";
1030 else
1031 Setr += "1, ";
1032 if (Attributes & ObjCPropertyAttribute::kind_copy)
1033 Setr += "1)";
1034 else
1035 Setr += "0)";
1036 }
1037 else {
1038 Setr += getIvarAccessString(D: OID) + " = ";
1039 Setr += PD->getName();
1040 }
1041 Setr += "; }\n";
1042 InsertText(Loc: startGetterSetterLoc, Str: Setr);
1043}
1044
1045static void RewriteOneForwardClassDecl(ObjCInterfaceDecl *ForwardDecl,
1046 std::string &typedefString) {
1047 typedefString += "\n#ifndef _REWRITER_typedef_";
1048 typedefString += ForwardDecl->getNameAsString();
1049 typedefString += "\n";
1050 typedefString += "#define _REWRITER_typedef_";
1051 typedefString += ForwardDecl->getNameAsString();
1052 typedefString += "\n";
1053 typedefString += "typedef struct objc_object ";
1054 typedefString += ForwardDecl->getNameAsString();
1055 // typedef struct { } _objc_exc_Classname;
1056 typedefString += ";\ntypedef struct {} _objc_exc_";
1057 typedefString += ForwardDecl->getNameAsString();
1058 typedefString += ";\n#endif\n";
1059}
1060
1061void RewriteModernObjC::RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
1062 const std::string &typedefString) {
1063 SourceLocation startLoc = ClassDecl->getBeginLoc();
1064 const char *startBuf = SM->getCharacterData(SL: startLoc);
1065 const char *semiPtr = strchr(s: startBuf, c: ';');
1066 // Replace the @class with typedefs corresponding to the classes.
1067 ReplaceText(Start: startLoc, OrigLength: semiPtr-startBuf+1, Str: typedefString);
1068}
1069
1070void RewriteModernObjC::RewriteForwardClassDecl(DeclGroupRef D) {
1071 std::string typedefString;
1072 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
1073 if (ObjCInterfaceDecl *ForwardDecl = dyn_cast<ObjCInterfaceDecl>(Val: *I)) {
1074 if (I == D.begin()) {
1075 // Translate to typedef's that forward reference structs with the same name
1076 // as the class. As a convenience, we include the original declaration
1077 // as a comment.
1078 typedefString += "// @class ";
1079 typedefString += ForwardDecl->getNameAsString();
1080 typedefString += ";";
1081 }
1082 RewriteOneForwardClassDecl(ForwardDecl, typedefString);
1083 }
1084 else
1085 HandleTopLevelSingleDecl(D: *I);
1086 }
1087 DeclGroupRef::iterator I = D.begin();
1088 RewriteForwardClassEpilogue(ClassDecl: cast<ObjCInterfaceDecl>(Val: *I), typedefString);
1089}
1090
1091void RewriteModernObjC::RewriteForwardClassDecl(
1092 const SmallVectorImpl<Decl *> &D) {
1093 std::string typedefString;
1094 for (unsigned i = 0; i < D.size(); i++) {
1095 ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(Val: D[i]);
1096 if (i == 0) {
1097 typedefString += "// @class ";
1098 typedefString += ForwardDecl->getNameAsString();
1099 typedefString += ";";
1100 }
1101 RewriteOneForwardClassDecl(ForwardDecl, typedefString);
1102 }
1103 RewriteForwardClassEpilogue(ClassDecl: cast<ObjCInterfaceDecl>(Val: D[0]), typedefString);
1104}
1105
1106void RewriteModernObjC::RewriteMethodDeclaration(ObjCMethodDecl *Method) {
1107 // When method is a synthesized one, such as a getter/setter there is
1108 // nothing to rewrite.
1109 if (Method->isImplicit())
1110 return;
1111 SourceLocation LocStart = Method->getBeginLoc();
1112 SourceLocation LocEnd = Method->getEndLoc();
1113
1114 if (SM->getExpansionLineNumber(Loc: LocEnd) >
1115 SM->getExpansionLineNumber(Loc: LocStart)) {
1116 InsertText(Loc: LocStart, Str: "#if 0\n");
1117 ReplaceText(Start: LocEnd, OrigLength: 1, Str: ";\n#endif\n");
1118 } else {
1119 InsertText(Loc: LocStart, Str: "// ");
1120 }
1121}
1122
1123void RewriteModernObjC::RewriteProperty(ObjCPropertyDecl *prop) {
1124 SourceLocation Loc = prop->getAtLoc();
1125
1126 ReplaceText(Start: Loc, OrigLength: 0, Str: "// ");
1127 // FIXME: handle properties that are declared across multiple lines.
1128}
1129
1130void RewriteModernObjC::RewriteCategoryDecl(ObjCCategoryDecl *CatDecl) {
1131 SourceLocation LocStart = CatDecl->getBeginLoc();
1132
1133 // FIXME: handle category headers that are declared across multiple lines.
1134 if (CatDecl->getIvarRBraceLoc().isValid()) {
1135 ReplaceText(Start: LocStart, OrigLength: 1, Str: "/** ");
1136 ReplaceText(Start: CatDecl->getIvarRBraceLoc(), OrigLength: 1, Str: "**/ ");
1137 }
1138 else {
1139 ReplaceText(Start: LocStart, OrigLength: 0, Str: "// ");
1140 }
1141
1142 for (auto *I : CatDecl->instance_properties())
1143 RewriteProperty(I);
1144
1145 for (auto *I : CatDecl->instance_methods())
1146 RewriteMethodDeclaration(I);
1147 for (auto *I : CatDecl->class_methods())
1148 RewriteMethodDeclaration(I);
1149
1150 // Lastly, comment out the @end.
1151 ReplaceText(Start: CatDecl->getAtEndRange().getBegin(),
1152 OrigLength: strlen(s: "@end"), Str: "/* @end */\n");
1153}
1154
1155void RewriteModernObjC::RewriteProtocolDecl(ObjCProtocolDecl *PDecl) {
1156 SourceLocation LocStart = PDecl->getBeginLoc();
1157 assert(PDecl->isThisDeclarationADefinition());
1158
1159 // FIXME: handle protocol headers that are declared across multiple lines.
1160 ReplaceText(Start: LocStart, OrigLength: 0, Str: "// ");
1161
1162 for (auto *I : PDecl->instance_methods())
1163 RewriteMethodDeclaration(I);
1164 for (auto *I : PDecl->class_methods())
1165 RewriteMethodDeclaration(I);
1166 for (auto *I : PDecl->instance_properties())
1167 RewriteProperty(I);
1168
1169 // Lastly, comment out the @end.
1170 SourceLocation LocEnd = PDecl->getAtEndRange().getBegin();
1171 ReplaceText(Start: LocEnd, OrigLength: strlen(s: "@end"), Str: "/* @end */\n");
1172
1173 // Must comment out @optional/@required
1174 const char *startBuf = SM->getCharacterData(SL: LocStart);
1175 const char *endBuf = SM->getCharacterData(SL: LocEnd);
1176 for (const char *p = startBuf; p < endBuf; p++) {
1177 if (*p == '@' && !strncmp(s1: p+1, s2: "optional", n: strlen(s: "optional"))) {
1178 SourceLocation OptionalLoc = LocStart.getLocWithOffset(Offset: p-startBuf);
1179 ReplaceText(Start: OptionalLoc, OrigLength: strlen(s: "@optional"), Str: "/* @optional */");
1180
1181 }
1182 else if (*p == '@' && !strncmp(s1: p+1, s2: "required", n: strlen(s: "required"))) {
1183 SourceLocation OptionalLoc = LocStart.getLocWithOffset(Offset: p-startBuf);
1184 ReplaceText(Start: OptionalLoc, OrigLength: strlen(s: "@required"), Str: "/* @required */");
1185
1186 }
1187 }
1188}
1189
1190void RewriteModernObjC::RewriteForwardProtocolDecl(DeclGroupRef D) {
1191 SourceLocation LocStart = (*D.begin())->getBeginLoc();
1192 if (LocStart.isInvalid())
1193 llvm_unreachable("Invalid SourceLocation");
1194 // FIXME: handle forward protocol that are declared across multiple lines.
1195 ReplaceText(Start: LocStart, OrigLength: 0, Str: "// ");
1196}
1197
1198void
1199RewriteModernObjC::RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG) {
1200 SourceLocation LocStart = DG[0]->getBeginLoc();
1201 if (LocStart.isInvalid())
1202 llvm_unreachable("Invalid SourceLocation");
1203 // FIXME: handle forward protocol that are declared across multiple lines.
1204 ReplaceText(Start: LocStart, OrigLength: 0, Str: "// ");
1205}
1206
1207void RewriteModernObjC::RewriteTypeIntoString(QualType T, std::string &ResultStr,
1208 const FunctionType *&FPRetType) {
1209 if (T->isObjCQualifiedIdType())
1210 ResultStr += "id";
1211 else if (T->isFunctionPointerType() ||
1212 T->isBlockPointerType()) {
1213 // needs special handling, since pointer-to-functions have special
1214 // syntax (where a decaration models use).
1215 QualType retType = T;
1216 QualType PointeeTy;
1217 if (const PointerType* PT = retType->getAs<PointerType>())
1218 PointeeTy = PT->getPointeeType();
1219 else if (const BlockPointerType *BPT = retType->getAs<BlockPointerType>())
1220 PointeeTy = BPT->getPointeeType();
1221 if ((FPRetType = PointeeTy->getAs<FunctionType>())) {
1222 ResultStr +=
1223 FPRetType->getReturnType().getAsString(Policy: Context->getPrintingPolicy());
1224 ResultStr += "(*";
1225 }
1226 } else
1227 ResultStr += T.getAsString(Policy: Context->getPrintingPolicy());
1228}
1229
1230void RewriteModernObjC::RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
1231 ObjCMethodDecl *OMD,
1232 std::string &ResultStr) {
1233 //fprintf(stderr,"In RewriteObjCMethodDecl\n");
1234 const FunctionType *FPRetType = nullptr;
1235 ResultStr += "\nstatic ";
1236 RewriteTypeIntoString(T: OMD->getReturnType(), ResultStr, FPRetType);
1237 ResultStr += " ";
1238
1239 // Unique method name
1240 std::string NameStr;
1241
1242 if (OMD->isInstanceMethod())
1243 NameStr += "_I_";
1244 else
1245 NameStr += "_C_";
1246
1247 NameStr += IDecl->getNameAsString();
1248 NameStr += "_";
1249
1250 if (ObjCCategoryImplDecl *CID =
1251 dyn_cast<ObjCCategoryImplDecl>(OMD->getDeclContext())) {
1252 NameStr += CID->getNameAsString();
1253 NameStr += "_";
1254 }
1255 // Append selector names, replacing ':' with '_'
1256 {
1257 std::string selString = OMD->getSelector().getAsString();
1258 int len = selString.size();
1259 for (int i = 0; i < len; i++)
1260 if (selString[i] == ':')
1261 selString[i] = '_';
1262 NameStr += selString;
1263 }
1264 // Remember this name for metadata emission
1265 MethodInternalNames[OMD] = NameStr;
1266 ResultStr += NameStr;
1267
1268 // Rewrite arguments
1269 ResultStr += "(";
1270
1271 // invisible arguments
1272 if (OMD->isInstanceMethod()) {
1273 QualType selfTy = Context->getObjCInterfaceType(Decl: IDecl);
1274 selfTy = Context->getPointerType(T: selfTy);
1275 if (!LangOpts.MicrosoftExt) {
1276 if (ObjCSynthesizedStructs.count(Ptr: const_cast<ObjCInterfaceDecl*>(IDecl)))
1277 ResultStr += "struct ";
1278 }
1279 // When rewriting for Microsoft, explicitly omit the structure name.
1280 ResultStr += IDecl->getNameAsString();
1281 ResultStr += " *";
1282 }
1283 else
1284 ResultStr += Context->getObjCClassType().getAsString(
1285 Policy: Context->getPrintingPolicy());
1286
1287 ResultStr += " self, ";
1288 ResultStr += Context->getObjCSelType().getAsString(Policy: Context->getPrintingPolicy());
1289 ResultStr += " _cmd";
1290
1291 // Method arguments.
1292 for (const auto *PDecl : OMD->parameters()) {
1293 ResultStr += ", ";
1294 if (PDecl->getType()->isObjCQualifiedIdType()) {
1295 ResultStr += "id ";
1296 ResultStr += PDecl->getNameAsString();
1297 } else {
1298 std::string Name = PDecl->getNameAsString();
1299 QualType QT = PDecl->getType();
1300 // Make sure we convert "t (^)(...)" to "t (*)(...)".
1301 (void)convertBlockPointerToFunctionPointer(T&: QT);
1302 QT.getAsStringInternal(Str&: Name, Policy: Context->getPrintingPolicy());
1303 ResultStr += Name;
1304 }
1305 }
1306 if (OMD->isVariadic())
1307 ResultStr += ", ...";
1308 ResultStr += ") ";
1309
1310 if (FPRetType) {
1311 ResultStr += ")"; // close the precedence "scope" for "*".
1312
1313 // Now, emit the argument types (if any).
1314 if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(Val: FPRetType)) {
1315 ResultStr += "(";
1316 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) {
1317 if (i) ResultStr += ", ";
1318 std::string ParamStr =
1319 FT->getParamType(i).getAsString(Policy: Context->getPrintingPolicy());
1320 ResultStr += ParamStr;
1321 }
1322 if (FT->isVariadic()) {
1323 if (FT->getNumParams())
1324 ResultStr += ", ";
1325 ResultStr += "...";
1326 }
1327 ResultStr += ")";
1328 } else {
1329 ResultStr += "()";
1330 }
1331 }
1332}
1333
1334void RewriteModernObjC::RewriteImplementationDecl(Decl *OID) {
1335 ObjCImplementationDecl *IMD = dyn_cast<ObjCImplementationDecl>(Val: OID);
1336 ObjCCategoryImplDecl *CID = dyn_cast<ObjCCategoryImplDecl>(Val: OID);
1337 assert((IMD || CID) && "Unknown implementation type");
1338
1339 if (IMD) {
1340 if (IMD->getIvarRBraceLoc().isValid()) {
1341 ReplaceText(Start: IMD->getBeginLoc(), OrigLength: 1, Str: "/** ");
1342 ReplaceText(Start: IMD->getIvarRBraceLoc(), OrigLength: 1, Str: "**/ ");
1343 }
1344 else {
1345 InsertText(Loc: IMD->getBeginLoc(), Str: "// ");
1346 }
1347 }
1348 else
1349 InsertText(Loc: CID->getBeginLoc(), Str: "// ");
1350
1351 for (auto *OMD : IMD ? IMD->instance_methods() : CID->instance_methods()) {
1352 if (!OMD->getBody())
1353 continue;
1354 std::string ResultStr;
1355 RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
1356 SourceLocation LocStart = OMD->getBeginLoc();
1357 SourceLocation LocEnd = OMD->getCompoundBody()->getBeginLoc();
1358
1359 const char *startBuf = SM->getCharacterData(LocStart);
1360 const char *endBuf = SM->getCharacterData(LocEnd);
1361 ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1362 }
1363
1364 for (auto *OMD : IMD ? IMD->class_methods() : CID->class_methods()) {
1365 if (!OMD->getBody())
1366 continue;
1367 std::string ResultStr;
1368 RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
1369 SourceLocation LocStart = OMD->getBeginLoc();
1370 SourceLocation LocEnd = OMD->getCompoundBody()->getBeginLoc();
1371
1372 const char *startBuf = SM->getCharacterData(LocStart);
1373 const char *endBuf = SM->getCharacterData(LocEnd);
1374 ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1375 }
1376 for (auto *I : IMD ? IMD->property_impls() : CID->property_impls())
1377 RewritePropertyImplDecl(I, IMD, CID);
1378
1379 InsertText(Loc: IMD ? IMD->getEndLoc() : CID->getEndLoc(), Str: "// ");
1380}
1381
1382void RewriteModernObjC::RewriteInterfaceDecl(ObjCInterfaceDecl *ClassDecl) {
1383 // Do not synthesize more than once.
1384 if (ObjCSynthesizedStructs.count(Ptr: ClassDecl))
1385 return;
1386 // Make sure super class's are written before current class is written.
1387 ObjCInterfaceDecl *SuperClass = ClassDecl->getSuperClass();
1388 while (SuperClass) {
1389 RewriteInterfaceDecl(ClassDecl: SuperClass);
1390 SuperClass = SuperClass->getSuperClass();
1391 }
1392 std::string ResultStr;
1393 if (!ObjCWrittenInterfaces.count(Ptr: ClassDecl->getCanonicalDecl())) {
1394 // we haven't seen a forward decl - generate a typedef.
1395 RewriteOneForwardClassDecl(ForwardDecl: ClassDecl, typedefString&: ResultStr);
1396 RewriteIvarOffsetSymbols(CDecl: ClassDecl, Result&: ResultStr);
1397
1398 RewriteObjCInternalStruct(CDecl: ClassDecl, Result&: ResultStr);
1399 // Mark this typedef as having been written into its c++ equivalent.
1400 ObjCWrittenInterfaces.insert(Ptr: ClassDecl->getCanonicalDecl());
1401
1402 for (auto *I : ClassDecl->instance_properties())
1403 RewriteProperty(I);
1404 for (auto *I : ClassDecl->instance_methods())
1405 RewriteMethodDeclaration(I);
1406 for (auto *I : ClassDecl->class_methods())
1407 RewriteMethodDeclaration(I);
1408
1409 // Lastly, comment out the @end.
1410 ReplaceText(Start: ClassDecl->getAtEndRange().getBegin(), OrigLength: strlen(s: "@end"),
1411 Str: "/* @end */\n");
1412 }
1413}
1414
1415Stmt *RewriteModernObjC::RewritePropertyOrImplicitSetter(PseudoObjectExpr *PseudoOp) {
1416 SourceRange OldRange = PseudoOp->getSourceRange();
1417
1418 // We just magically know some things about the structure of this
1419 // expression.
1420 ObjCMessageExpr *OldMsg =
1421 cast<ObjCMessageExpr>(Val: PseudoOp->getSemanticExpr(
1422 index: PseudoOp->getNumSemanticExprs() - 1));
1423
1424 // Because the rewriter doesn't allow us to rewrite rewritten code,
1425 // we need to suppress rewriting the sub-statements.
1426 Expr *Base;
1427 SmallVector<Expr*, 2> Args;
1428 {
1429 DisableReplaceStmtScope S(*this);
1430
1431 // Rebuild the base expression if we have one.
1432 Base = nullptr;
1433 if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1434 Base = OldMsg->getInstanceReceiver();
1435 Base = cast<OpaqueValueExpr>(Val: Base)->getSourceExpr();
1436 Base = cast<Expr>(Val: RewriteFunctionBodyOrGlobalInitializer(Base));
1437 }
1438
1439 unsigned numArgs = OldMsg->getNumArgs();
1440 for (unsigned i = 0; i < numArgs; i++) {
1441 Expr *Arg = OldMsg->getArg(Arg: i);
1442 if (isa<OpaqueValueExpr>(Val: Arg))
1443 Arg = cast<OpaqueValueExpr>(Val: Arg)->getSourceExpr();
1444 Arg = cast<Expr>(Val: RewriteFunctionBodyOrGlobalInitializer(Arg));
1445 Args.push_back(Elt: Arg);
1446 }
1447 }
1448
1449 // TODO: avoid this copy.
1450 SmallVector<SourceLocation, 1> SelLocs;
1451 OldMsg->getSelectorLocs(SelLocs);
1452
1453 ObjCMessageExpr *NewMsg = nullptr;
1454 switch (OldMsg->getReceiverKind()) {
1455 case ObjCMessageExpr::Class:
1456 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1457 OldMsg->getValueKind(),
1458 OldMsg->getLeftLoc(),
1459 OldMsg->getClassReceiverTypeInfo(),
1460 OldMsg->getSelector(),
1461 SelLocs,
1462 OldMsg->getMethodDecl(),
1463 Args,
1464 OldMsg->getRightLoc(),
1465 OldMsg->isImplicit());
1466 break;
1467
1468 case ObjCMessageExpr::Instance:
1469 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1470 OldMsg->getValueKind(),
1471 OldMsg->getLeftLoc(),
1472 Base,
1473 OldMsg->getSelector(),
1474 SelLocs,
1475 OldMsg->getMethodDecl(),
1476 Args,
1477 OldMsg->getRightLoc(),
1478 OldMsg->isImplicit());
1479 break;
1480
1481 case ObjCMessageExpr::SuperClass:
1482 case ObjCMessageExpr::SuperInstance:
1483 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1484 OldMsg->getValueKind(),
1485 OldMsg->getLeftLoc(),
1486 OldMsg->getSuperLoc(),
1487 OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1488 OldMsg->getSuperType(),
1489 OldMsg->getSelector(),
1490 SelLocs,
1491 OldMsg->getMethodDecl(),
1492 Args,
1493 OldMsg->getRightLoc(),
1494 OldMsg->isImplicit());
1495 break;
1496 }
1497
1498 Stmt *Replacement = SynthMessageExpr(Exp: NewMsg);
1499 ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
1500 return Replacement;
1501}
1502
1503Stmt *RewriteModernObjC::RewritePropertyOrImplicitGetter(PseudoObjectExpr *PseudoOp) {
1504 SourceRange OldRange = PseudoOp->getSourceRange();
1505
1506 // We just magically know some things about the structure of this
1507 // expression.
1508 ObjCMessageExpr *OldMsg =
1509 cast<ObjCMessageExpr>(Val: PseudoOp->getResultExpr()->IgnoreImplicit());
1510
1511 // Because the rewriter doesn't allow us to rewrite rewritten code,
1512 // we need to suppress rewriting the sub-statements.
1513 Expr *Base = nullptr;
1514 SmallVector<Expr*, 1> Args;
1515 {
1516 DisableReplaceStmtScope S(*this);
1517 // Rebuild the base expression if we have one.
1518 if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1519 Base = OldMsg->getInstanceReceiver();
1520 Base = cast<OpaqueValueExpr>(Val: Base)->getSourceExpr();
1521 Base = cast<Expr>(Val: RewriteFunctionBodyOrGlobalInitializer(Base));
1522 }
1523 unsigned numArgs = OldMsg->getNumArgs();
1524 for (unsigned i = 0; i < numArgs; i++) {
1525 Expr *Arg = OldMsg->getArg(Arg: i);
1526 if (isa<OpaqueValueExpr>(Val: Arg))
1527 Arg = cast<OpaqueValueExpr>(Val: Arg)->getSourceExpr();
1528 Arg = cast<Expr>(Val: RewriteFunctionBodyOrGlobalInitializer(Arg));
1529 Args.push_back(Elt: Arg);
1530 }
1531 }
1532
1533 // Intentionally empty.
1534 SmallVector<SourceLocation, 1> SelLocs;
1535
1536 ObjCMessageExpr *NewMsg = nullptr;
1537 switch (OldMsg->getReceiverKind()) {
1538 case ObjCMessageExpr::Class:
1539 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1540 OldMsg->getValueKind(),
1541 OldMsg->getLeftLoc(),
1542 OldMsg->getClassReceiverTypeInfo(),
1543 OldMsg->getSelector(),
1544 SelLocs,
1545 OldMsg->getMethodDecl(),
1546 Args,
1547 OldMsg->getRightLoc(),
1548 OldMsg->isImplicit());
1549 break;
1550
1551 case ObjCMessageExpr::Instance:
1552 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1553 OldMsg->getValueKind(),
1554 OldMsg->getLeftLoc(),
1555 Base,
1556 OldMsg->getSelector(),
1557 SelLocs,
1558 OldMsg->getMethodDecl(),
1559 Args,
1560 OldMsg->getRightLoc(),
1561 OldMsg->isImplicit());
1562 break;
1563
1564 case ObjCMessageExpr::SuperClass:
1565 case ObjCMessageExpr::SuperInstance:
1566 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1567 OldMsg->getValueKind(),
1568 OldMsg->getLeftLoc(),
1569 OldMsg->getSuperLoc(),
1570 OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1571 OldMsg->getSuperType(),
1572 OldMsg->getSelector(),
1573 SelLocs,
1574 OldMsg->getMethodDecl(),
1575 Args,
1576 OldMsg->getRightLoc(),
1577 OldMsg->isImplicit());
1578 break;
1579 }
1580
1581 Stmt *Replacement = SynthMessageExpr(Exp: NewMsg);
1582 ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
1583 return Replacement;
1584}
1585
1586/// SynthCountByEnumWithState - To print:
1587/// ((NSUInteger (*)
1588/// (id, SEL, struct __objcFastEnumerationState *, id *, NSUInteger))
1589/// (void *)objc_msgSend)((id)l_collection,
1590/// sel_registerName(
1591/// "countByEnumeratingWithState:objects:count:"),
1592/// &enumState,
1593/// (id *)__rw_items, (NSUInteger)16)
1594///
1595void RewriteModernObjC::SynthCountByEnumWithState(std::string &buf) {
1596 buf += "((_WIN_NSUInteger (*) (id, SEL, struct __objcFastEnumerationState *, "
1597 "id *, _WIN_NSUInteger))(void *)objc_msgSend)";
1598 buf += "\n\t\t";
1599 buf += "((id)l_collection,\n\t\t";
1600 buf += "sel_registerName(\"countByEnumeratingWithState:objects:count:\"),";
1601 buf += "\n\t\t";
1602 buf += "&enumState, "
1603 "(id *)__rw_items, (_WIN_NSUInteger)16)";
1604}
1605
1606/// RewriteBreakStmt - Rewrite for a break-stmt inside an ObjC2's foreach
1607/// statement to exit to its outer synthesized loop.
1608///
1609Stmt *RewriteModernObjC::RewriteBreakStmt(BreakStmt *S) {
1610 if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Val: Stmts.back()))
1611 return S;
1612 // replace break with goto __break_label
1613 std::string buf;
1614
1615 SourceLocation startLoc = S->getBeginLoc();
1616 buf = "goto __break_label_";
1617 buf += utostr(X: ObjCBcLabelNo.back());
1618 ReplaceText(Start: startLoc, OrigLength: strlen(s: "break"), Str: buf);
1619
1620 return nullptr;
1621}
1622
1623void RewriteModernObjC::ConvertSourceLocationToLineDirective(
1624 SourceLocation Loc,
1625 std::string &LineString) {
1626 if (Loc.isFileID() && GenerateLineInfo) {
1627 LineString += "\n#line ";
1628 PresumedLoc PLoc = SM->getPresumedLoc(Loc);
1629 LineString += utostr(X: PLoc.getLine());
1630 LineString += " \"";
1631 LineString += Lexer::Stringify(Str: PLoc.getFilename());
1632 LineString += "\"\n";
1633 }
1634}
1635
1636/// RewriteContinueStmt - Rewrite for a continue-stmt inside an ObjC2's foreach
1637/// statement to continue with its inner synthesized loop.
1638///
1639Stmt *RewriteModernObjC::RewriteContinueStmt(ContinueStmt *S) {
1640 if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Val: Stmts.back()))
1641 return S;
1642 // replace continue with goto __continue_label
1643 std::string buf;
1644
1645 SourceLocation startLoc = S->getBeginLoc();
1646 buf = "goto __continue_label_";
1647 buf += utostr(X: ObjCBcLabelNo.back());
1648 ReplaceText(Start: startLoc, OrigLength: strlen(s: "continue"), Str: buf);
1649
1650 return nullptr;
1651}
1652
1653/// RewriteObjCForCollectionStmt - Rewriter for ObjC2's foreach statement.
1654/// It rewrites:
1655/// for ( type elem in collection) { stmts; }
1656
1657/// Into:
1658/// {
1659/// type elem;
1660/// struct __objcFastEnumerationState enumState = { 0 };
1661/// id __rw_items[16];
1662/// id l_collection = (id)collection;
1663/// NSUInteger limit = [l_collection countByEnumeratingWithState:&enumState
1664/// objects:__rw_items count:16];
1665/// if (limit) {
1666/// unsigned long startMutations = *enumState.mutationsPtr;
1667/// do {
1668/// unsigned long counter = 0;
1669/// do {
1670/// if (startMutations != *enumState.mutationsPtr)
1671/// objc_enumerationMutation(l_collection);
1672/// elem = (type)enumState.itemsPtr[counter++];
1673/// stmts;
1674/// __continue_label: ;
1675/// } while (counter < limit);
1676/// } while ((limit = [l_collection countByEnumeratingWithState:&enumState
1677/// objects:__rw_items count:16]));
1678/// elem = nil;
1679/// __break_label: ;
1680/// }
1681/// else
1682/// elem = nil;
1683/// }
1684///
1685Stmt *RewriteModernObjC::RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
1686 SourceLocation OrigEnd) {
1687 assert(!Stmts.empty() && "ObjCForCollectionStmt - Statement stack empty");
1688 assert(isa<ObjCForCollectionStmt>(Stmts.back()) &&
1689 "ObjCForCollectionStmt Statement stack mismatch");
1690 assert(!ObjCBcLabelNo.empty() &&
1691 "ObjCForCollectionStmt - Label No stack empty");
1692
1693 SourceLocation startLoc = S->getBeginLoc();
1694 const char *startBuf = SM->getCharacterData(SL: startLoc);
1695 StringRef elementName;
1696 std::string elementTypeAsString;
1697 std::string buf;
1698 // line directive first.
1699 SourceLocation ForEachLoc = S->getForLoc();
1700 ConvertSourceLocationToLineDirective(Loc: ForEachLoc, LineString&: buf);
1701 buf += "{\n\t";
1702 if (DeclStmt *DS = dyn_cast<DeclStmt>(Val: S->getElement())) {
1703 // type elem;
1704 NamedDecl* D = cast<NamedDecl>(Val: DS->getSingleDecl());
1705 QualType ElementType = cast<ValueDecl>(Val: D)->getType();
1706 if (ElementType->isObjCQualifiedIdType() ||
1707 ElementType->isObjCQualifiedInterfaceType())
1708 // Simply use 'id' for all qualified types.
1709 elementTypeAsString = "id";
1710 else
1711 elementTypeAsString = ElementType.getAsString(Policy: Context->getPrintingPolicy());
1712 buf += elementTypeAsString;
1713 buf += " ";
1714 elementName = D->getName();
1715 buf += elementName;
1716 buf += ";\n\t";
1717 }
1718 else {
1719 DeclRefExpr *DR = cast<DeclRefExpr>(Val: S->getElement());
1720 elementName = DR->getDecl()->getName();
1721 ValueDecl *VD = DR->getDecl();
1722 if (VD->getType()->isObjCQualifiedIdType() ||
1723 VD->getType()->isObjCQualifiedInterfaceType())
1724 // Simply use 'id' for all qualified types.
1725 elementTypeAsString = "id";
1726 else
1727 elementTypeAsString = VD->getType().getAsString(Policy: Context->getPrintingPolicy());
1728 }
1729
1730 // struct __objcFastEnumerationState enumState = { 0 };
1731 buf += "struct __objcFastEnumerationState enumState = { 0 };\n\t";
1732 // id __rw_items[16];
1733 buf += "id __rw_items[16];\n\t";
1734 // id l_collection = (id)
1735 buf += "id l_collection = (id)";
1736 // Find start location of 'collection' the hard way!
1737 const char *startCollectionBuf = startBuf;
1738 startCollectionBuf += 3; // skip 'for'
1739 startCollectionBuf = strchr(s: startCollectionBuf, c: '(');
1740 startCollectionBuf++; // skip '('
1741 // find 'in' and skip it.
1742 while (*startCollectionBuf != ' ' ||
1743 *(startCollectionBuf+1) != 'i' || *(startCollectionBuf+2) != 'n' ||
1744 (*(startCollectionBuf+3) != ' ' &&
1745 *(startCollectionBuf+3) != '[' && *(startCollectionBuf+3) != '('))
1746 startCollectionBuf++;
1747 startCollectionBuf += 3;
1748
1749 // Replace: "for (type element in" with string constructed thus far.
1750 ReplaceText(Start: startLoc, OrigLength: startCollectionBuf - startBuf, Str: buf);
1751 // Replace ')' in for '(' type elem in collection ')' with ';'
1752 SourceLocation rightParenLoc = S->getRParenLoc();
1753 const char *rparenBuf = SM->getCharacterData(SL: rightParenLoc);
1754 SourceLocation lparenLoc = startLoc.getLocWithOffset(Offset: rparenBuf-startBuf);
1755 buf = ";\n\t";
1756
1757 // unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
1758 // objects:__rw_items count:16];
1759 // which is synthesized into:
1760 // NSUInteger limit =
1761 // ((NSUInteger (*)
1762 // (id, SEL, struct __objcFastEnumerationState *, id *, NSUInteger))
1763 // (void *)objc_msgSend)((id)l_collection,
1764 // sel_registerName(
1765 // "countByEnumeratingWithState:objects:count:"),
1766 // (struct __objcFastEnumerationState *)&state,
1767 // (id *)__rw_items, (NSUInteger)16);
1768 buf += "_WIN_NSUInteger limit =\n\t\t";
1769 SynthCountByEnumWithState(buf);
1770 buf += ";\n\t";
1771 /// if (limit) {
1772 /// unsigned long startMutations = *enumState.mutationsPtr;
1773 /// do {
1774 /// unsigned long counter = 0;
1775 /// do {
1776 /// if (startMutations != *enumState.mutationsPtr)
1777 /// objc_enumerationMutation(l_collection);
1778 /// elem = (type)enumState.itemsPtr[counter++];
1779 buf += "if (limit) {\n\t";
1780 buf += "unsigned long startMutations = *enumState.mutationsPtr;\n\t";
1781 buf += "do {\n\t\t";
1782 buf += "unsigned long counter = 0;\n\t\t";
1783 buf += "do {\n\t\t\t";
1784 buf += "if (startMutations != *enumState.mutationsPtr)\n\t\t\t\t";
1785 buf += "objc_enumerationMutation(l_collection);\n\t\t\t";
1786 buf += elementName;
1787 buf += " = (";
1788 buf += elementTypeAsString;
1789 buf += ")enumState.itemsPtr[counter++];";
1790 // Replace ')' in for '(' type elem in collection ')' with all of these.
1791 ReplaceText(Start: lparenLoc, OrigLength: 1, Str: buf);
1792
1793 /// __continue_label: ;
1794 /// } while (counter < limit);
1795 /// } while ((limit = [l_collection countByEnumeratingWithState:&enumState
1796 /// objects:__rw_items count:16]));
1797 /// elem = nil;
1798 /// __break_label: ;
1799 /// }
1800 /// else
1801 /// elem = nil;
1802 /// }
1803 ///
1804 buf = ";\n\t";
1805 buf += "__continue_label_";
1806 buf += utostr(X: ObjCBcLabelNo.back());
1807 buf += ": ;";
1808 buf += "\n\t\t";
1809 buf += "} while (counter < limit);\n\t";
1810 buf += "} while ((limit = ";
1811 SynthCountByEnumWithState(buf);
1812 buf += "));\n\t";
1813 buf += elementName;
1814 buf += " = ((";
1815 buf += elementTypeAsString;
1816 buf += ")0);\n\t";
1817 buf += "__break_label_";
1818 buf += utostr(X: ObjCBcLabelNo.back());
1819 buf += ": ;\n\t";
1820 buf += "}\n\t";
1821 buf += "else\n\t\t";
1822 buf += elementName;
1823 buf += " = ((";
1824 buf += elementTypeAsString;
1825 buf += ")0);\n\t";
1826 buf += "}\n";
1827
1828 // Insert all these *after* the statement body.
1829 // FIXME: If this should support Obj-C++, support CXXTryStmt
1830 if (isa<CompoundStmt>(Val: S->getBody())) {
1831 SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(Offset: 1);
1832 InsertText(Loc: endBodyLoc, Str: buf);
1833 } else {
1834 /* Need to treat single statements specially. For example:
1835 *
1836 * for (A *a in b) if (stuff()) break;
1837 * for (A *a in b) xxxyy;
1838 *
1839 * The following code simply scans ahead to the semi to find the actual end.
1840 */
1841 const char *stmtBuf = SM->getCharacterData(SL: OrigEnd);
1842 const char *semiBuf = strchr(s: stmtBuf, c: ';');
1843 assert(semiBuf && "Can't find ';'");
1844 SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(Offset: semiBuf-stmtBuf+1);
1845 InsertText(Loc: endBodyLoc, Str: buf);
1846 }
1847 Stmts.pop_back();
1848 ObjCBcLabelNo.pop_back();
1849 return nullptr;
1850}
1851
1852static void Write_RethrowObject(std::string &buf) {
1853 buf += "{ struct _FIN { _FIN(id reth) : rethrow(reth) {}\n";
1854 buf += "\t~_FIN() { if (rethrow) objc_exception_throw(rethrow); }\n";
1855 buf += "\tid rethrow;\n";
1856 buf += "\t} _fin_force_rethow(_rethrow);";
1857}
1858
1859/// RewriteObjCSynchronizedStmt -
1860/// This routine rewrites @synchronized(expr) stmt;
1861/// into:
1862/// objc_sync_enter(expr);
1863/// @try stmt @finally { objc_sync_exit(expr); }
1864///
1865Stmt *RewriteModernObjC::RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
1866 // Get the start location and compute the semi location.
1867 SourceLocation startLoc = S->getBeginLoc();
1868 const char *startBuf = SM->getCharacterData(SL: startLoc);
1869
1870 assert((*startBuf == '@') && "bogus @synchronized location");
1871
1872 std::string buf;
1873 SourceLocation SynchLoc = S->getAtSynchronizedLoc();
1874 ConvertSourceLocationToLineDirective(Loc: SynchLoc, LineString&: buf);
1875 buf += "{ id _rethrow = 0; id _sync_obj = (id)";
1876
1877 const char *lparenBuf = startBuf;
1878 while (*lparenBuf != '(') lparenBuf++;
1879 ReplaceText(Start: startLoc, OrigLength: lparenBuf-startBuf+1, Str: buf);
1880
1881 buf = "; objc_sync_enter(_sync_obj);\n";
1882 buf += "try {\n\tstruct _SYNC_EXIT { _SYNC_EXIT(id arg) : sync_exit(arg) {}";
1883 buf += "\n\t~_SYNC_EXIT() {objc_sync_exit(sync_exit);}";
1884 buf += "\n\tid sync_exit;";
1885 buf += "\n\t} _sync_exit(_sync_obj);\n";
1886
1887 // We can't use S->getSynchExpr()->getEndLoc() to find the end location, since
1888 // the sync expression is typically a message expression that's already
1889 // been rewritten! (which implies the SourceLocation's are invalid).
1890 SourceLocation RParenExprLoc = S->getSynchBody()->getBeginLoc();
1891 const char *RParenExprLocBuf = SM->getCharacterData(SL: RParenExprLoc);
1892 while (*RParenExprLocBuf != ')') RParenExprLocBuf--;
1893 RParenExprLoc = startLoc.getLocWithOffset(Offset: RParenExprLocBuf-startBuf);
1894
1895 SourceLocation LBranceLoc = S->getSynchBody()->getBeginLoc();
1896 const char *LBraceLocBuf = SM->getCharacterData(SL: LBranceLoc);
1897 assert (*LBraceLocBuf == '{');
1898 ReplaceText(Start: RParenExprLoc, OrigLength: (LBraceLocBuf - SM->getCharacterData(SL: RParenExprLoc) + 1), Str: buf);
1899
1900 SourceLocation startRBraceLoc = S->getSynchBody()->getEndLoc();
1901 assert((*SM->getCharacterData(startRBraceLoc) == '}') &&
1902 "bogus @synchronized block");
1903
1904 buf = "} catch (id e) {_rethrow = e;}\n";
1905 Write_RethrowObject(buf);
1906 buf += "}\n";
1907 buf += "}\n";
1908
1909 ReplaceText(Start: startRBraceLoc, OrigLength: 1, Str: buf);
1910
1911 return nullptr;
1912}
1913
1914void RewriteModernObjC::WarnAboutReturnGotoStmts(Stmt *S)
1915{
1916 // Perform a bottom up traversal of all children.
1917 for (Stmt *SubStmt : S->children())
1918 if (SubStmt)
1919 WarnAboutReturnGotoStmts(S: SubStmt);
1920
1921 if (isa<ReturnStmt>(Val: S) || isa<GotoStmt>(Val: S)) {
1922 Diags.Report(Loc: Context->getFullLoc(Loc: S->getBeginLoc()),
1923 DiagID: TryFinallyContainsReturnDiag);
1924 }
1925}
1926
1927Stmt *RewriteModernObjC::RewriteObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S) {
1928 SourceLocation startLoc = S->getAtLoc();
1929 ReplaceText(Start: startLoc, OrigLength: strlen(s: "@autoreleasepool"), Str: "/* @autoreleasepool */");
1930 ReplaceText(Start: S->getSubStmt()->getBeginLoc(), OrigLength: 1,
1931 Str: "{ __AtAutoreleasePool __autoreleasepool; ");
1932
1933 return nullptr;
1934}
1935
1936Stmt *RewriteModernObjC::RewriteObjCTryStmt(ObjCAtTryStmt *S) {
1937 ObjCAtFinallyStmt *finalStmt = S->getFinallyStmt();
1938 bool noCatch = S->getNumCatchStmts() == 0;
1939 std::string buf;
1940 SourceLocation TryLocation = S->getAtTryLoc();
1941 ConvertSourceLocationToLineDirective(Loc: TryLocation, LineString&: buf);
1942
1943 if (finalStmt) {
1944 if (noCatch)
1945 buf += "{ id volatile _rethrow = 0;\n";
1946 else {
1947 buf += "{ id volatile _rethrow = 0;\ntry {\n";
1948 }
1949 }
1950 // Get the start location and compute the semi location.
1951 SourceLocation startLoc = S->getBeginLoc();
1952 const char *startBuf = SM->getCharacterData(SL: startLoc);
1953
1954 assert((*startBuf == '@') && "bogus @try location");
1955 if (finalStmt)
1956 ReplaceText(Start: startLoc, OrigLength: 1, Str: buf);
1957 else
1958 // @try -> try
1959 ReplaceText(Start: startLoc, OrigLength: 1, Str: "");
1960
1961 for (ObjCAtCatchStmt *Catch : S->catch_stmts()) {
1962 VarDecl *catchDecl = Catch->getCatchParamDecl();
1963
1964 startLoc = Catch->getBeginLoc();
1965 bool AtRemoved = false;
1966 if (catchDecl) {
1967 QualType t = catchDecl->getType();
1968 if (const ObjCObjectPointerType *Ptr =
1969 t->getAs<ObjCObjectPointerType>()) {
1970 // Should be a pointer to a class.
1971 ObjCInterfaceDecl *IDecl = Ptr->getObjectType()->getInterface();
1972 if (IDecl) {
1973 std::string Result;
1974 ConvertSourceLocationToLineDirective(Catch->getBeginLoc(), Result);
1975
1976 startBuf = SM->getCharacterData(startLoc);
1977 assert((*startBuf == '@') && "bogus @catch location");
1978 SourceLocation rParenLoc = Catch->getRParenLoc();
1979 const char *rParenBuf = SM->getCharacterData(rParenLoc);
1980
1981 // _objc_exc_Foo *_e as argument to catch.
1982 Result += "catch (_objc_exc_"; Result += IDecl->getNameAsString();
1983 Result += " *_"; Result += catchDecl->getNameAsString();
1984 Result += ")";
1985 ReplaceText(startLoc, rParenBuf-startBuf+1, Result);
1986 // Foo *e = (Foo *)_e;
1987 Result.clear();
1988 Result = "{ ";
1989 Result += IDecl->getNameAsString();
1990 Result += " *"; Result += catchDecl->getNameAsString();
1991 Result += " = ("; Result += IDecl->getNameAsString(); Result += "*)";
1992 Result += "_"; Result += catchDecl->getNameAsString();
1993
1994 Result += "; ";
1995 SourceLocation lBraceLoc = Catch->getCatchBody()->getBeginLoc();
1996 ReplaceText(lBraceLoc, 1, Result);
1997 AtRemoved = true;
1998 }
1999 }
2000 }
2001 if (!AtRemoved)
2002 // @catch -> catch
2003 ReplaceText(startLoc, 1, "");
2004
2005 }
2006 if (finalStmt) {
2007 buf.clear();
2008 SourceLocation FinallyLoc = finalStmt->getBeginLoc();
2009
2010 if (noCatch) {
2011 ConvertSourceLocationToLineDirective(Loc: FinallyLoc, LineString&: buf);
2012 buf += "catch (id e) {_rethrow = e;}\n";
2013 }
2014 else {
2015 buf += "}\n";
2016 ConvertSourceLocationToLineDirective(Loc: FinallyLoc, LineString&: buf);
2017 buf += "catch (id e) {_rethrow = e;}\n";
2018 }
2019
2020 SourceLocation startFinalLoc = finalStmt->getBeginLoc();
2021 ReplaceText(Start: startFinalLoc, OrigLength: 8, Str: buf);
2022 Stmt *body = finalStmt->getFinallyBody();
2023 SourceLocation startFinalBodyLoc = body->getBeginLoc();
2024 buf.clear();
2025 Write_RethrowObject(buf);
2026 ReplaceText(Start: startFinalBodyLoc, OrigLength: 1, Str: buf);
2027
2028 SourceLocation endFinalBodyLoc = body->getEndLoc();
2029 ReplaceText(Start: endFinalBodyLoc, OrigLength: 1, Str: "}\n}");
2030 // Now check for any return/continue/go statements within the @try.
2031 WarnAboutReturnGotoStmts(S: S->getTryBody());
2032 }
2033
2034 return nullptr;
2035}
2036
2037// This can't be done with ReplaceStmt(S, ThrowExpr), since
2038// the throw expression is typically a message expression that's already
2039// been rewritten! (which implies the SourceLocation's are invalid).
2040Stmt *RewriteModernObjC::RewriteObjCThrowStmt(ObjCAtThrowStmt *S) {
2041 // Get the start location and compute the semi location.
2042 SourceLocation startLoc = S->getBeginLoc();
2043 const char *startBuf = SM->getCharacterData(SL: startLoc);
2044
2045 assert((*startBuf == '@') && "bogus @throw location");
2046
2047 std::string buf;
2048 /* void objc_exception_throw(id) __attribute__((noreturn)); */
2049 if (S->getThrowExpr())
2050 buf = "objc_exception_throw(";
2051 else
2052 buf = "throw";
2053
2054 // handle "@ throw" correctly.
2055 const char *wBuf = strchr(s: startBuf, c: 'w');
2056 assert((*wBuf == 'w') && "@throw: can't find 'w'");
2057 ReplaceText(Start: startLoc, OrigLength: wBuf-startBuf+1, Str: buf);
2058
2059 SourceLocation endLoc = S->getEndLoc();
2060 const char *endBuf = SM->getCharacterData(SL: endLoc);
2061 const char *semiBuf = strchr(s: endBuf, c: ';');
2062 assert((*semiBuf == ';') && "@throw: can't find ';'");
2063 SourceLocation semiLoc = startLoc.getLocWithOffset(Offset: semiBuf-startBuf);
2064 if (S->getThrowExpr())
2065 ReplaceText(Start: semiLoc, OrigLength: 1, Str: ");");
2066 return nullptr;
2067}
2068
2069Stmt *RewriteModernObjC::RewriteAtEncode(ObjCEncodeExpr *Exp) {
2070 // Create a new string expression.
2071 std::string StrEncoding;
2072 Context->getObjCEncodingForType(T: Exp->getEncodedType(), S&: StrEncoding);
2073 Expr *Replacement = getStringLiteral(Str: StrEncoding);
2074 ReplaceStmt(Exp, Replacement);
2075
2076 // Replace this subexpr in the parent.
2077 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2078 return Replacement;
2079}
2080
2081Stmt *RewriteModernObjC::RewriteAtSelector(ObjCSelectorExpr *Exp) {
2082 if (!SelGetUidFunctionDecl)
2083 SynthSelGetUidFunctionDecl();
2084 assert(SelGetUidFunctionDecl && "Can't find sel_registerName() decl");
2085 // Create a call to sel_registerName("selName").
2086 SmallVector<Expr*, 8> SelExprs;
2087 SelExprs.push_back(getStringLiteral(Str: Exp->getSelector().getAsString()));
2088 CallExpr *SelExp = SynthesizeCallToFunctionDecl(FD: SelGetUidFunctionDecl,
2089 Args: SelExprs);
2090 ReplaceStmt(Exp, SelExp);
2091 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2092 return SelExp;
2093}
2094
2095CallExpr *
2096RewriteModernObjC::SynthesizeCallToFunctionDecl(FunctionDecl *FD,
2097 ArrayRef<Expr *> Args,
2098 SourceLocation StartLoc,
2099 SourceLocation EndLoc) {
2100 // Get the type, we will need to reference it in a couple spots.
2101 QualType msgSendType = FD->getType();
2102
2103 // Create a reference to the objc_msgSend() declaration.
2104 DeclRefExpr *DRE = new (Context) DeclRefExpr(*Context, FD, false, msgSendType,
2105 VK_LValue, SourceLocation());
2106
2107 // Now, we cast the reference to a pointer to the objc_msgSend type.
2108 QualType pToFunc = Context->getPointerType(T: msgSendType);
2109 ImplicitCastExpr *ICE =
2110 ImplicitCastExpr::Create(*Context, pToFunc, CK_FunctionToPointerDecay,
2111 DRE, nullptr, VK_PRValue, FPOptionsOverride());
2112
2113 const auto *FT = msgSendType->castAs<FunctionType>();
2114 CallExpr *Exp =
2115 CallExpr::Create(Ctx: *Context, Fn: ICE, Args, Ty: FT->getCallResultType(*Context),
2116 VK: VK_PRValue, RParenLoc: EndLoc, FPFeatures: FPOptionsOverride());
2117 return Exp;
2118}
2119
2120static bool scanForProtocolRefs(const char *startBuf, const char *endBuf,
2121 const char *&startRef, const char *&endRef) {
2122 while (startBuf < endBuf) {
2123 if (*startBuf == '<')
2124 startRef = startBuf; // mark the start.
2125 if (*startBuf == '>') {
2126 if (startRef && *startRef == '<') {
2127 endRef = startBuf; // mark the end.
2128 return true;
2129 }
2130 return false;
2131 }
2132 startBuf++;
2133 }
2134 return false;
2135}
2136
2137static void scanToNextArgument(const char *&argRef) {
2138 int angle = 0;
2139 while (*argRef != ')' && (*argRef != ',' || angle > 0)) {
2140 if (*argRef == '<')
2141 angle++;
2142 else if (*argRef == '>')
2143 angle--;
2144 argRef++;
2145 }
2146 assert(angle == 0 && "scanToNextArgument - bad protocol type syntax");
2147}
2148
2149bool RewriteModernObjC::needToScanForQualifiers(QualType T) {
2150 if (T->isObjCQualifiedIdType())
2151 return true;
2152 if (const PointerType *PT = T->getAs<PointerType>()) {
2153 if (PT->getPointeeType()->isObjCQualifiedIdType())
2154 return true;
2155 }
2156 if (T->isObjCObjectPointerType()) {
2157 T = T->getPointeeType();
2158 return T->isObjCQualifiedInterfaceType();
2159 }
2160 if (T->isArrayType()) {
2161 QualType ElemTy = Context->getBaseElementType(QT: T);
2162 return needToScanForQualifiers(T: ElemTy);
2163 }
2164 return false;
2165}
2166
2167void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Expr *E) {
2168 QualType Type = E->getType();
2169 if (needToScanForQualifiers(T: Type)) {
2170 SourceLocation Loc, EndLoc;
2171
2172 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(Val: E)) {
2173 Loc = ECE->getLParenLoc();
2174 EndLoc = ECE->getRParenLoc();
2175 } else {
2176 Loc = E->getBeginLoc();
2177 EndLoc = E->getEndLoc();
2178 }
2179 // This will defend against trying to rewrite synthesized expressions.
2180 if (Loc.isInvalid() || EndLoc.isInvalid())
2181 return;
2182
2183 const char *startBuf = SM->getCharacterData(SL: Loc);
2184 const char *endBuf = SM->getCharacterData(SL: EndLoc);
2185 const char *startRef = nullptr, *endRef = nullptr;
2186 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2187 // Get the locations of the startRef, endRef.
2188 SourceLocation LessLoc = Loc.getLocWithOffset(Offset: startRef-startBuf);
2189 SourceLocation GreaterLoc = Loc.getLocWithOffset(Offset: endRef-startBuf+1);
2190 // Comment out the protocol references.
2191 InsertText(Loc: LessLoc, Str: "/*");
2192 InsertText(Loc: GreaterLoc, Str: "*/");
2193 }
2194 }
2195}
2196
2197void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Decl *Dcl) {
2198 SourceLocation Loc;
2199 QualType Type;
2200 const FunctionProtoType *proto = nullptr;
2201 if (VarDecl *VD = dyn_cast<VarDecl>(Val: Dcl)) {
2202 Loc = VD->getLocation();
2203 Type = VD->getType();
2204 }
2205 else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Val: Dcl)) {
2206 Loc = FD->getLocation();
2207 // Check for ObjC 'id' and class types that have been adorned with protocol
2208 // information (id<p>, C<p>*). The protocol references need to be rewritten!
2209 const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2210 assert(funcType && "missing function type");
2211 proto = dyn_cast<FunctionProtoType>(Val: funcType);
2212 if (!proto)
2213 return;
2214 Type = proto->getReturnType();
2215 }
2216 else if (FieldDecl *FD = dyn_cast<FieldDecl>(Val: Dcl)) {
2217 Loc = FD->getLocation();
2218 Type = FD->getType();
2219 }
2220 else if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(Val: Dcl)) {
2221 Loc = TD->getLocation();
2222 Type = TD->getUnderlyingType();
2223 }
2224 else
2225 return;
2226
2227 if (needToScanForQualifiers(T: Type)) {
2228 // Since types are unique, we need to scan the buffer.
2229
2230 const char *endBuf = SM->getCharacterData(SL: Loc);
2231 const char *startBuf = endBuf;
2232 while (*startBuf != ';' && *startBuf != '<' && startBuf != MainFileStart)
2233 startBuf--; // scan backward (from the decl location) for return type.
2234 const char *startRef = nullptr, *endRef = nullptr;
2235 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2236 // Get the locations of the startRef, endRef.
2237 SourceLocation LessLoc = Loc.getLocWithOffset(Offset: startRef-endBuf);
2238 SourceLocation GreaterLoc = Loc.getLocWithOffset(Offset: endRef-endBuf+1);
2239 // Comment out the protocol references.
2240 InsertText(Loc: LessLoc, Str: "/*");
2241 InsertText(Loc: GreaterLoc, Str: "*/");
2242 }
2243 }
2244 if (!proto)
2245 return; // most likely, was a variable
2246 // Now check arguments.
2247 const char *startBuf = SM->getCharacterData(SL: Loc);
2248 const char *startFuncBuf = startBuf;
2249 for (unsigned i = 0; i < proto->getNumParams(); i++) {
2250 if (needToScanForQualifiers(T: proto->getParamType(i))) {
2251 // Since types are unique, we need to scan the buffer.
2252
2253 const char *endBuf = startBuf;
2254 // scan forward (from the decl location) for argument types.
2255 scanToNextArgument(argRef&: endBuf);
2256 const char *startRef = nullptr, *endRef = nullptr;
2257 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2258 // Get the locations of the startRef, endRef.
2259 SourceLocation LessLoc =
2260 Loc.getLocWithOffset(Offset: startRef-startFuncBuf);
2261 SourceLocation GreaterLoc =
2262 Loc.getLocWithOffset(Offset: endRef-startFuncBuf+1);
2263 // Comment out the protocol references.
2264 InsertText(Loc: LessLoc, Str: "/*");
2265 InsertText(Loc: GreaterLoc, Str: "*/");
2266 }
2267 startBuf = ++endBuf;
2268 }
2269 else {
2270 // If the function name is derived from a macro expansion, then the
2271 // argument buffer will not follow the name. Need to speak with Chris.
2272 while (*startBuf && *startBuf != ')' && *startBuf != ',')
2273 startBuf++; // scan forward (from the decl location) for argument types.
2274 startBuf++;
2275 }
2276 }
2277}
2278
2279void RewriteModernObjC::RewriteTypeOfDecl(VarDecl *ND) {
2280 QualType QT = ND->getType();
2281 const Type* TypePtr = QT->getAs<Type>();
2282 if (!isa<TypeOfExprType>(Val: TypePtr))
2283 return;
2284 while (isa<TypeOfExprType>(Val: TypePtr)) {
2285 const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(Val: TypePtr);
2286 QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
2287 TypePtr = QT->getAs<Type>();
2288 }
2289 // FIXME. This will not work for multiple declarators; as in:
2290 // __typeof__(a) b,c,d;
2291 std::string TypeAsString(QT.getAsString(Policy: Context->getPrintingPolicy()));
2292 SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
2293 const char *startBuf = SM->getCharacterData(SL: DeclLoc);
2294 if (ND->getInit()) {
2295 std::string Name(ND->getNameAsString());
2296 TypeAsString += " " + Name + " = ";
2297 Expr *E = ND->getInit();
2298 SourceLocation startLoc;
2299 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(Val: E))
2300 startLoc = ECE->getLParenLoc();
2301 else
2302 startLoc = E->getBeginLoc();
2303 startLoc = SM->getExpansionLoc(Loc: startLoc);
2304 const char *endBuf = SM->getCharacterData(SL: startLoc);
2305 ReplaceText(Start: DeclLoc, OrigLength: endBuf-startBuf-1, Str: TypeAsString);
2306 }
2307 else {
2308 SourceLocation X = ND->getEndLoc();
2309 X = SM->getExpansionLoc(Loc: X);
2310 const char *endBuf = SM->getCharacterData(SL: X);
2311 ReplaceText(Start: DeclLoc, OrigLength: endBuf-startBuf-1, Str: TypeAsString);
2312 }
2313}
2314
2315// SynthSelGetUidFunctionDecl - SEL sel_registerName(const char *str);
2316void RewriteModernObjC::SynthSelGetUidFunctionDecl() {
2317 IdentifierInfo *SelGetUidIdent = &Context->Idents.get(Name: "sel_registerName");
2318 SmallVector<QualType, 16> ArgTys;
2319 ArgTys.push_back(Elt: Context->getPointerType(Context->CharTy.withConst()));
2320 QualType getFuncType =
2321 getSimpleFunctionType(result: Context->getObjCSelType(), args: ArgTys);
2322 SelGetUidFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2323 SourceLocation(),
2324 SourceLocation(),
2325 SelGetUidIdent, getFuncType,
2326 nullptr, SC_Extern);
2327}
2328
2329void RewriteModernObjC::RewriteFunctionDecl(FunctionDecl *FD) {
2330 // declared in <objc/objc.h>
2331 if (FD->getIdentifier() &&
2332 FD->getName() == "sel_registerName") {
2333 SelGetUidFunctionDecl = FD;
2334 return;
2335 }
2336 RewriteObjCQualifiedInterfaceTypes(FD);
2337}
2338
2339void RewriteModernObjC::RewriteBlockPointerType(std::string& Str, QualType Type) {
2340 std::string TypeString(Type.getAsString(Policy: Context->getPrintingPolicy()));
2341 const char *argPtr = TypeString.c_str();
2342 if (!strchr(s: argPtr, c: '^')) {
2343 Str += TypeString;
2344 return;
2345 }
2346 while (*argPtr) {
2347 Str += (*argPtr == '^' ? '*' : *argPtr);
2348 argPtr++;
2349 }
2350}
2351
2352// FIXME. Consolidate this routine with RewriteBlockPointerType.
2353void RewriteModernObjC::RewriteBlockPointerTypeVariable(std::string& Str,
2354 ValueDecl *VD) {
2355 QualType Type = VD->getType();
2356 std::string TypeString(Type.getAsString(Policy: Context->getPrintingPolicy()));
2357 const char *argPtr = TypeString.c_str();
2358 int paren = 0;
2359 while (*argPtr) {
2360 switch (*argPtr) {
2361 case '(':
2362 Str += *argPtr;
2363 paren++;
2364 break;
2365 case ')':
2366 Str += *argPtr;
2367 paren--;
2368 break;
2369 case '^':
2370 Str += '*';
2371 if (paren == 1)
2372 Str += VD->getNameAsString();
2373 break;
2374 default:
2375 Str += *argPtr;
2376 break;
2377 }
2378 argPtr++;
2379 }
2380}
2381
2382void RewriteModernObjC::RewriteBlockLiteralFunctionDecl(FunctionDecl *FD) {
2383 SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
2384 const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2385 const FunctionProtoType *proto = dyn_cast<FunctionProtoType>(Val: funcType);
2386 if (!proto)
2387 return;
2388 QualType Type = proto->getReturnType();
2389 std::string FdStr = Type.getAsString(Policy: Context->getPrintingPolicy());
2390 FdStr += " ";
2391 FdStr += FD->getName();
2392 FdStr += "(";
2393 unsigned numArgs = proto->getNumParams();
2394 for (unsigned i = 0; i < numArgs; i++) {
2395 QualType ArgType = proto->getParamType(i);
2396 RewriteBlockPointerType(Str&: FdStr, Type: ArgType);
2397 if (i+1 < numArgs)
2398 FdStr += ", ";
2399 }
2400 if (FD->isVariadic()) {
2401 FdStr += (numArgs > 0) ? ", ...);\n" : "...);\n";
2402 }
2403 else
2404 FdStr += ");\n";
2405 InsertText(Loc: FunLocStart, Str: FdStr);
2406}
2407
2408// SynthSuperConstructorFunctionDecl - id __rw_objc_super(id obj, id super);
2409void RewriteModernObjC::SynthSuperConstructorFunctionDecl() {
2410 if (SuperConstructorFunctionDecl)
2411 return;
2412 IdentifierInfo *msgSendIdent = &Context->Idents.get(Name: "__rw_objc_super");
2413 SmallVector<QualType, 16> ArgTys;
2414 QualType argT = Context->getObjCIdType();
2415 assert(!argT.isNull() && "Can't find 'id' type");
2416 ArgTys.push_back(Elt: argT);
2417 ArgTys.push_back(Elt: argT);
2418 QualType msgSendType = getSimpleFunctionType(result: Context->getObjCIdType(),
2419 args: ArgTys);
2420 SuperConstructorFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2421 SourceLocation(),
2422 SourceLocation(),
2423 msgSendIdent, msgSendType,
2424 nullptr, SC_Extern);
2425}
2426
2427// SynthMsgSendFunctionDecl - id objc_msgSend(id self, SEL op, ...);
2428void RewriteModernObjC::SynthMsgSendFunctionDecl() {
2429 IdentifierInfo *msgSendIdent = &Context->Idents.get(Name: "objc_msgSend");
2430 SmallVector<QualType, 16> ArgTys;
2431 QualType argT = Context->getObjCIdType();
2432 assert(!argT.isNull() && "Can't find 'id' type");
2433 ArgTys.push_back(Elt: argT);
2434 argT = Context->getObjCSelType();
2435 assert(!argT.isNull() && "Can't find 'SEL' type");
2436 ArgTys.push_back(Elt: argT);
2437 QualType msgSendType = getSimpleFunctionType(result: Context->getObjCIdType(),
2438 args: ArgTys, /*variadic=*/true);
2439 MsgSendFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2440 SourceLocation(),
2441 SourceLocation(),
2442 msgSendIdent, msgSendType, nullptr,
2443 SC_Extern);
2444}
2445
2446// SynthMsgSendSuperFunctionDecl - id objc_msgSendSuper(void);
2447void RewriteModernObjC::SynthMsgSendSuperFunctionDecl() {
2448 IdentifierInfo *msgSendIdent = &Context->Idents.get(Name: "objc_msgSendSuper");
2449 SmallVector<QualType, 2> ArgTys;
2450 ArgTys.push_back(Elt: Context->VoidTy);
2451 QualType msgSendType = getSimpleFunctionType(result: Context->getObjCIdType(),
2452 args: ArgTys, /*variadic=*/true);
2453 MsgSendSuperFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2454 SourceLocation(),
2455 SourceLocation(),
2456 msgSendIdent, msgSendType,
2457 nullptr, SC_Extern);
2458}
2459
2460// SynthMsgSendStretFunctionDecl - id objc_msgSend_stret(id self, SEL op, ...);
2461void RewriteModernObjC::SynthMsgSendStretFunctionDecl() {
2462 IdentifierInfo *msgSendIdent = &Context->Idents.get(Name: "objc_msgSend_stret");
2463 SmallVector<QualType, 16> ArgTys;
2464 QualType argT = Context->getObjCIdType();
2465 assert(!argT.isNull() && "Can't find 'id' type");
2466 ArgTys.push_back(Elt: argT);
2467 argT = Context->getObjCSelType();
2468 assert(!argT.isNull() && "Can't find 'SEL' type");
2469 ArgTys.push_back(Elt: argT);
2470 QualType msgSendType = getSimpleFunctionType(result: Context->getObjCIdType(),
2471 args: ArgTys, /*variadic=*/true);
2472 MsgSendStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2473 SourceLocation(),
2474 SourceLocation(),
2475 msgSendIdent, msgSendType,
2476 nullptr, SC_Extern);
2477}
2478
2479// SynthMsgSendSuperStretFunctionDecl -
2480// id objc_msgSendSuper_stret(void);
2481void RewriteModernObjC::SynthMsgSendSuperStretFunctionDecl() {
2482 IdentifierInfo *msgSendIdent =
2483 &Context->Idents.get(Name: "objc_msgSendSuper_stret");
2484 SmallVector<QualType, 2> ArgTys;
2485 ArgTys.push_back(Elt: Context->VoidTy);
2486 QualType msgSendType = getSimpleFunctionType(result: Context->getObjCIdType(),
2487 args: ArgTys, /*variadic=*/true);
2488 MsgSendSuperStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2489 SourceLocation(),
2490 SourceLocation(),
2491 msgSendIdent,
2492 msgSendType, nullptr,
2493 SC_Extern);
2494}
2495
2496// SynthMsgSendFpretFunctionDecl - double objc_msgSend_fpret(id self, SEL op, ...);
2497void RewriteModernObjC::SynthMsgSendFpretFunctionDecl() {
2498 IdentifierInfo *msgSendIdent = &Context->Idents.get(Name: "objc_msgSend_fpret");
2499 SmallVector<QualType, 16> ArgTys;
2500 QualType argT = Context->getObjCIdType();
2501 assert(!argT.isNull() && "Can't find 'id' type");
2502 ArgTys.push_back(Elt: argT);
2503 argT = Context->getObjCSelType();
2504 assert(!argT.isNull() && "Can't find 'SEL' type");
2505 ArgTys.push_back(Elt: argT);
2506 QualType msgSendType = getSimpleFunctionType(result: Context->DoubleTy,
2507 args: ArgTys, /*variadic=*/true);
2508 MsgSendFpretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2509 SourceLocation(),
2510 SourceLocation(),
2511 msgSendIdent, msgSendType,
2512 nullptr, SC_Extern);
2513}
2514
2515// SynthGetClassFunctionDecl - Class objc_getClass(const char *name);
2516void RewriteModernObjC::SynthGetClassFunctionDecl() {
2517 IdentifierInfo *getClassIdent = &Context->Idents.get(Name: "objc_getClass");
2518 SmallVector<QualType, 16> ArgTys;
2519 ArgTys.push_back(Elt: Context->getPointerType(Context->CharTy.withConst()));
2520 QualType getClassType = getSimpleFunctionType(result: Context->getObjCClassType(),
2521 args: ArgTys);
2522 GetClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2523 SourceLocation(),
2524 SourceLocation(),
2525 getClassIdent, getClassType,
2526 nullptr, SC_Extern);
2527}
2528
2529// SynthGetSuperClassFunctionDecl - Class class_getSuperclass(Class cls);
2530void RewriteModernObjC::SynthGetSuperClassFunctionDecl() {
2531 IdentifierInfo *getSuperClassIdent =
2532 &Context->Idents.get(Name: "class_getSuperclass");
2533 SmallVector<QualType, 16> ArgTys;
2534 ArgTys.push_back(Elt: Context->getObjCClassType());
2535 QualType getClassType = getSimpleFunctionType(result: Context->getObjCClassType(),
2536 args: ArgTys);
2537 GetSuperClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2538 SourceLocation(),
2539 SourceLocation(),
2540 getSuperClassIdent,
2541 getClassType, nullptr,
2542 SC_Extern);
2543}
2544
2545// SynthGetMetaClassFunctionDecl - Class objc_getMetaClass(const char *name);
2546void RewriteModernObjC::SynthGetMetaClassFunctionDecl() {
2547 IdentifierInfo *getClassIdent = &Context->Idents.get(Name: "objc_getMetaClass");
2548 SmallVector<QualType, 16> ArgTys;
2549 ArgTys.push_back(Elt: Context->getPointerType(Context->CharTy.withConst()));
2550 QualType getClassType = getSimpleFunctionType(result: Context->getObjCClassType(),
2551 args: ArgTys);
2552 GetMetaClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2553 SourceLocation(),
2554 SourceLocation(),
2555 getClassIdent, getClassType,
2556 nullptr, SC_Extern);
2557}
2558
2559Stmt *RewriteModernObjC::RewriteObjCStringLiteral(ObjCStringLiteral *Exp) {
2560 assert (Exp != nullptr && "Expected non-null ObjCStringLiteral");
2561 QualType strType = getConstantStringStructType();
2562
2563 std::string S = "__NSConstantStringImpl_";
2564
2565 std::string tmpName = InFileName;
2566 unsigned i;
2567 for (i=0; i < tmpName.length(); i++) {
2568 char c = tmpName.at(n: i);
2569 // replace any non-alphanumeric characters with '_'.
2570 if (!isAlphanumeric(c))
2571 tmpName[i] = '_';
2572 }
2573 S += tmpName;
2574 S += "_";
2575 S += utostr(X: NumObjCStringLiterals++);
2576
2577 Preamble += "static __NSConstantStringImpl " + S;
2578 Preamble += " __attribute__ ((section (\"__DATA, __cfstring\"))) = {__CFConstantStringClassReference,";
2579 Preamble += "0x000007c8,"; // utf8_str
2580 // The pretty printer for StringLiteral handles escape characters properly.
2581 std::string prettyBufS;
2582 llvm::raw_string_ostream prettyBuf(prettyBufS);
2583 Exp->getString()->printPretty(prettyBuf, nullptr, PrintingPolicy(LangOpts));
2584 Preamble += prettyBuf.str();
2585 Preamble += ",";
2586 Preamble += utostr(X: Exp->getString()->getByteLength()) + "};\n";
2587
2588 VarDecl *NewVD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
2589 SourceLocation(), &Context->Idents.get(Name: S),
2590 strType, nullptr, SC_Static);
2591 DeclRefExpr *DRE = new (Context)
2592 DeclRefExpr(*Context, NewVD, false, strType, VK_LValue, SourceLocation());
2593 Expr *Unop = UnaryOperator::Create(
2594 C: const_cast<ASTContext &>(*Context), input: DRE, opc: UO_AddrOf,
2595 type: Context->getPointerType(DRE->getType()), VK: VK_PRValue, OK: OK_Ordinary,
2596 l: SourceLocation(), CanOverflow: false, FPFeatures: FPOptionsOverride());
2597 // cast to NSConstantString *
2598 CastExpr *cast = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: Exp->getType(),
2599 Kind: CK_CPointerToObjCPointerCast, E: Unop);
2600 ReplaceStmt(Exp, cast);
2601 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2602 return cast;
2603}
2604
2605Stmt *RewriteModernObjC::RewriteObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Exp) {
2606 unsigned IntSize =
2607 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
2608
2609 Expr *FlagExp = IntegerLiteral::Create(*Context,
2610 llvm::APInt(IntSize, Exp->getValue()),
2611 Context->IntTy, Exp->getLocation());
2612 CastExpr *cast = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: Context->ObjCBuiltinBoolTy,
2613 Kind: CK_BitCast, E: FlagExp);
2614 ParenExpr *PE = new (Context) ParenExpr(Exp->getLocation(), Exp->getExprLoc(),
2615 cast);
2616 ReplaceStmt(Exp, PE);
2617 return PE;
2618}
2619
2620Stmt *RewriteModernObjC::RewriteObjCBoxedExpr(ObjCBoxedExpr *Exp) {
2621 // synthesize declaration of helper functions needed in this routine.
2622 if (!SelGetUidFunctionDecl)
2623 SynthSelGetUidFunctionDecl();
2624 // use objc_msgSend() for all.
2625 if (!MsgSendFunctionDecl)
2626 SynthMsgSendFunctionDecl();
2627 if (!GetClassFunctionDecl)
2628 SynthGetClassFunctionDecl();
2629
2630 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2631 SourceLocation StartLoc = Exp->getBeginLoc();
2632 SourceLocation EndLoc = Exp->getEndLoc();
2633
2634 // Synthesize a call to objc_msgSend().
2635 SmallVector<Expr*, 4> MsgExprs;
2636 SmallVector<Expr*, 4> ClsExprs;
2637
2638 // Create a call to objc_getClass("<BoxingClass>"). It will be the 1st argument.
2639 ObjCMethodDecl *BoxingMethod = Exp->getBoxingMethod();
2640 ObjCInterfaceDecl *BoxingClass = BoxingMethod->getClassInterface();
2641
2642 IdentifierInfo *clsName = BoxingClass->getIdentifier();
2643 ClsExprs.push_back(getStringLiteral(Str: clsName->getName()));
2644 CallExpr *Cls = SynthesizeCallToFunctionDecl(FD: GetClassFunctionDecl, Args: ClsExprs,
2645 StartLoc, EndLoc);
2646 MsgExprs.push_back(Cls);
2647
2648 // Create a call to sel_registerName("<BoxingMethod>:"), etc.
2649 // it will be the 2nd argument.
2650 SmallVector<Expr*, 4> SelExprs;
2651 SelExprs.push_back(
2652 getStringLiteral(Str: BoxingMethod->getSelector().getAsString()));
2653 CallExpr *SelExp = SynthesizeCallToFunctionDecl(FD: SelGetUidFunctionDecl,
2654 Args: SelExprs, StartLoc, EndLoc);
2655 MsgExprs.push_back(SelExp);
2656
2657 // User provided sub-expression is the 3rd, and last, argument.
2658 Expr *subExpr = Exp->getSubExpr();
2659 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(Val: subExpr)) {
2660 QualType type = ICE->getType();
2661 const Expr *SubExpr = ICE->IgnoreParenImpCasts();
2662 CastKind CK = CK_BitCast;
2663 if (SubExpr->getType()->isIntegralType(Ctx: *Context) && type->isBooleanType())
2664 CK = CK_IntegralToBoolean;
2665 subExpr = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: type, Kind: CK, E: subExpr);
2666 }
2667 MsgExprs.push_back(Elt: subExpr);
2668
2669 SmallVector<QualType, 4> ArgTypes;
2670 ArgTypes.push_back(Elt: Context->getObjCClassType());
2671 ArgTypes.push_back(Elt: Context->getObjCSelType());
2672 for (const auto PI : BoxingMethod->parameters())
2673 ArgTypes.push_back(Elt: PI->getType());
2674
2675 QualType returnType = Exp->getType();
2676 // Get the type, we will need to reference it in a couple spots.
2677 QualType msgSendType = MsgSendFlavor->getType();
2678
2679 // Create a reference to the objc_msgSend() declaration.
2680 DeclRefExpr *DRE = new (Context) DeclRefExpr(
2681 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2682
2683 CastExpr *cast = NoTypeInfoCStyleCastExpr(
2684 Ctx: Context, Ty: Context->getPointerType(Context->VoidTy), Kind: CK_BitCast, E: DRE);
2685
2686 // Now do the "normal" pointer to function cast.
2687 QualType castType =
2688 getSimpleFunctionType(result: returnType, args: ArgTypes, variadic: BoxingMethod->isVariadic());
2689 castType = Context->getPointerType(T: castType);
2690 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2691 cast);
2692
2693 // Don't forget the parens to enforce the proper binding.
2694 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2695
2696 auto *FT = msgSendType->castAs<FunctionType>();
2697 CallExpr *CE = CallExpr::Create(Ctx: *Context, Fn: PE, Args: MsgExprs, Ty: FT->getReturnType(),
2698 VK: VK_PRValue, RParenLoc: EndLoc, FPFeatures: FPOptionsOverride());
2699 ReplaceStmt(Exp, CE);
2700 return CE;
2701}
2702
2703Stmt *RewriteModernObjC::RewriteObjCArrayLiteralExpr(ObjCArrayLiteral *Exp) {
2704 // synthesize declaration of helper functions needed in this routine.
2705 if (!SelGetUidFunctionDecl)
2706 SynthSelGetUidFunctionDecl();
2707 // use objc_msgSend() for all.
2708 if (!MsgSendFunctionDecl)
2709 SynthMsgSendFunctionDecl();
2710 if (!GetClassFunctionDecl)
2711 SynthGetClassFunctionDecl();
2712
2713 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2714 SourceLocation StartLoc = Exp->getBeginLoc();
2715 SourceLocation EndLoc = Exp->getEndLoc();
2716
2717 // Build the expression: __NSContainer_literal(int, ...).arr
2718 QualType IntQT = Context->IntTy;
2719 QualType NSArrayFType =
2720 getSimpleFunctionType(result: Context->VoidTy, args: IntQT, variadic: true);
2721 std::string NSArrayFName("__NSContainer_literal");
2722 FunctionDecl *NSArrayFD = SynthBlockInitFunctionDecl(name: NSArrayFName);
2723 DeclRefExpr *NSArrayDRE = new (Context) DeclRefExpr(
2724 *Context, NSArrayFD, false, NSArrayFType, VK_PRValue, SourceLocation());
2725
2726 SmallVector<Expr*, 16> InitExprs;
2727 unsigned NumElements = Exp->getNumElements();
2728 unsigned UnsignedIntSize =
2729 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
2730 Expr *count = IntegerLiteral::Create(*Context,
2731 llvm::APInt(UnsignedIntSize, NumElements),
2732 Context->UnsignedIntTy, SourceLocation());
2733 InitExprs.push_back(Elt: count);
2734 for (unsigned i = 0; i < NumElements; i++)
2735 InitExprs.push_back(Elt: Exp->getElement(Index: i));
2736 Expr *NSArrayCallExpr =
2737 CallExpr::Create(*Context, NSArrayDRE, InitExprs, NSArrayFType, VK_LValue,
2738 SourceLocation(), FPOptionsOverride());
2739
2740 FieldDecl *ARRFD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(),
2741 IdLoc: SourceLocation(),
2742 Id: &Context->Idents.get(Name: "arr"),
2743 T: Context->getPointerType(Context->VoidPtrTy),
2744 TInfo: nullptr, /*BitWidth=*/BW: nullptr,
2745 /*Mutable=*/true, InitStyle: ICIS_NoInit);
2746 MemberExpr *ArrayLiteralME =
2747 MemberExpr::CreateImplicit(C: *Context, Base: NSArrayCallExpr, IsArrow: false, MemberDecl: ARRFD,
2748 T: ARRFD->getType(), VK: VK_LValue, OK: OK_Ordinary);
2749 QualType ConstIdT = Context->getObjCIdType().withConst();
2750 CStyleCastExpr * ArrayLiteralObjects =
2751 NoTypeInfoCStyleCastExpr(Context,
2752 Context->getPointerType(T: ConstIdT),
2753 CK_BitCast,
2754 ArrayLiteralME);
2755
2756 // Synthesize a call to objc_msgSend().
2757 SmallVector<Expr*, 32> MsgExprs;
2758 SmallVector<Expr*, 4> ClsExprs;
2759 QualType expType = Exp->getType();
2760
2761 // Create a call to objc_getClass("NSArray"). It will be th 1st argument.
2762 ObjCInterfaceDecl *Class =
2763 expType->getPointeeType()->castAs<ObjCObjectType>()->getInterface();
2764
2765 IdentifierInfo *clsName = Class->getIdentifier();
2766 ClsExprs.push_back(getStringLiteral(Str: clsName->getName()));
2767 CallExpr *Cls = SynthesizeCallToFunctionDecl(FD: GetClassFunctionDecl, Args: ClsExprs,
2768 StartLoc, EndLoc);
2769 MsgExprs.push_back(Cls);
2770
2771 // Create a call to sel_registerName("arrayWithObjects:count:").
2772 // it will be the 2nd argument.
2773 SmallVector<Expr*, 4> SelExprs;
2774 ObjCMethodDecl *ArrayMethod = Exp->getArrayWithObjectsMethod();
2775 SelExprs.push_back(
2776 getStringLiteral(Str: ArrayMethod->getSelector().getAsString()));
2777 CallExpr *SelExp = SynthesizeCallToFunctionDecl(FD: SelGetUidFunctionDecl,
2778 Args: SelExprs, StartLoc, EndLoc);
2779 MsgExprs.push_back(SelExp);
2780
2781 // (const id [])objects
2782 MsgExprs.push_back(ArrayLiteralObjects);
2783
2784 // (NSUInteger)cnt
2785 Expr *cnt = IntegerLiteral::Create(*Context,
2786 llvm::APInt(UnsignedIntSize, NumElements),
2787 Context->UnsignedIntTy, SourceLocation());
2788 MsgExprs.push_back(Elt: cnt);
2789
2790 SmallVector<QualType, 4> ArgTypes;
2791 ArgTypes.push_back(Elt: Context->getObjCClassType());
2792 ArgTypes.push_back(Elt: Context->getObjCSelType());
2793 for (const auto *PI : ArrayMethod->parameters())
2794 ArgTypes.push_back(Elt: PI->getType());
2795
2796 QualType returnType = Exp->getType();
2797 // Get the type, we will need to reference it in a couple spots.
2798 QualType msgSendType = MsgSendFlavor->getType();
2799
2800 // Create a reference to the objc_msgSend() declaration.
2801 DeclRefExpr *DRE = new (Context) DeclRefExpr(
2802 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2803
2804 CastExpr *cast = NoTypeInfoCStyleCastExpr(
2805 Ctx: Context, Ty: Context->getPointerType(Context->VoidTy), Kind: CK_BitCast, E: DRE);
2806
2807 // Now do the "normal" pointer to function cast.
2808 QualType castType =
2809 getSimpleFunctionType(result: returnType, args: ArgTypes, variadic: ArrayMethod->isVariadic());
2810 castType = Context->getPointerType(T: castType);
2811 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2812 cast);
2813
2814 // Don't forget the parens to enforce the proper binding.
2815 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2816
2817 const FunctionType *FT = msgSendType->castAs<FunctionType>();
2818 CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
2819 VK_PRValue, EndLoc, FPOptionsOverride());
2820 ReplaceStmt(Exp, CE);
2821 return CE;
2822}
2823
2824Stmt *RewriteModernObjC::RewriteObjCDictionaryLiteralExpr(ObjCDictionaryLiteral *Exp) {
2825 // synthesize declaration of helper functions needed in this routine.
2826 if (!SelGetUidFunctionDecl)
2827 SynthSelGetUidFunctionDecl();
2828 // use objc_msgSend() for all.
2829 if (!MsgSendFunctionDecl)
2830 SynthMsgSendFunctionDecl();
2831 if (!GetClassFunctionDecl)
2832 SynthGetClassFunctionDecl();
2833
2834 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2835 SourceLocation StartLoc = Exp->getBeginLoc();
2836 SourceLocation EndLoc = Exp->getEndLoc();
2837
2838 // Build the expression: __NSContainer_literal(int, ...).arr
2839 QualType IntQT = Context->IntTy;
2840 QualType NSDictFType =
2841 getSimpleFunctionType(result: Context->VoidTy, args: IntQT, variadic: true);
2842 std::string NSDictFName("__NSContainer_literal");
2843 FunctionDecl *NSDictFD = SynthBlockInitFunctionDecl(name: NSDictFName);
2844 DeclRefExpr *NSDictDRE = new (Context) DeclRefExpr(
2845 *Context, NSDictFD, false, NSDictFType, VK_PRValue, SourceLocation());
2846
2847 SmallVector<Expr*, 16> KeyExprs;
2848 SmallVector<Expr*, 16> ValueExprs;
2849
2850 unsigned NumElements = Exp->getNumElements();
2851 unsigned UnsignedIntSize =
2852 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
2853 Expr *count = IntegerLiteral::Create(*Context,
2854 llvm::APInt(UnsignedIntSize, NumElements),
2855 Context->UnsignedIntTy, SourceLocation());
2856 KeyExprs.push_back(Elt: count);
2857 ValueExprs.push_back(Elt: count);
2858 for (unsigned i = 0; i < NumElements; i++) {
2859 ObjCDictionaryElement Element = Exp->getKeyValueElement(Index: i);
2860 KeyExprs.push_back(Elt: Element.Key);
2861 ValueExprs.push_back(Elt: Element.Value);
2862 }
2863
2864 // (const id [])objects
2865 Expr *NSValueCallExpr =
2866 CallExpr::Create(*Context, NSDictDRE, ValueExprs, NSDictFType, VK_LValue,
2867 SourceLocation(), FPOptionsOverride());
2868
2869 FieldDecl *ARRFD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(),
2870 IdLoc: SourceLocation(),
2871 Id: &Context->Idents.get(Name: "arr"),
2872 T: Context->getPointerType(Context->VoidPtrTy),
2873 TInfo: nullptr, /*BitWidth=*/BW: nullptr,
2874 /*Mutable=*/true, InitStyle: ICIS_NoInit);
2875 MemberExpr *DictLiteralValueME =
2876 MemberExpr::CreateImplicit(C: *Context, Base: NSValueCallExpr, IsArrow: false, MemberDecl: ARRFD,
2877 T: ARRFD->getType(), VK: VK_LValue, OK: OK_Ordinary);
2878 QualType ConstIdT = Context->getObjCIdType().withConst();
2879 CStyleCastExpr * DictValueObjects =
2880 NoTypeInfoCStyleCastExpr(Context,
2881 Context->getPointerType(T: ConstIdT),
2882 CK_BitCast,
2883 DictLiteralValueME);
2884 // (const id <NSCopying> [])keys
2885 Expr *NSKeyCallExpr =
2886 CallExpr::Create(*Context, NSDictDRE, KeyExprs, NSDictFType, VK_LValue,
2887 SourceLocation(), FPOptionsOverride());
2888
2889 MemberExpr *DictLiteralKeyME =
2890 MemberExpr::CreateImplicit(C: *Context, Base: NSKeyCallExpr, IsArrow: false, MemberDecl: ARRFD,
2891 T: ARRFD->getType(), VK: VK_LValue, OK: OK_Ordinary);
2892
2893 CStyleCastExpr * DictKeyObjects =
2894 NoTypeInfoCStyleCastExpr(Context,
2895 Context->getPointerType(T: ConstIdT),
2896 CK_BitCast,
2897 DictLiteralKeyME);
2898
2899 // Synthesize a call to objc_msgSend().
2900 SmallVector<Expr*, 32> MsgExprs;
2901 SmallVector<Expr*, 4> ClsExprs;
2902 QualType expType = Exp->getType();
2903
2904 // Create a call to objc_getClass("NSArray"). It will be th 1st argument.
2905 ObjCInterfaceDecl *Class =
2906 expType->getPointeeType()->castAs<ObjCObjectType>()->getInterface();
2907
2908 IdentifierInfo *clsName = Class->getIdentifier();
2909 ClsExprs.push_back(getStringLiteral(Str: clsName->getName()));
2910 CallExpr *Cls = SynthesizeCallToFunctionDecl(FD: GetClassFunctionDecl, Args: ClsExprs,
2911 StartLoc, EndLoc);
2912 MsgExprs.push_back(Cls);
2913
2914 // Create a call to sel_registerName("arrayWithObjects:count:").
2915 // it will be the 2nd argument.
2916 SmallVector<Expr*, 4> SelExprs;
2917 ObjCMethodDecl *DictMethod = Exp->getDictWithObjectsMethod();
2918 SelExprs.push_back(getStringLiteral(Str: DictMethod->getSelector().getAsString()));
2919 CallExpr *SelExp = SynthesizeCallToFunctionDecl(FD: SelGetUidFunctionDecl,
2920 Args: SelExprs, StartLoc, EndLoc);
2921 MsgExprs.push_back(SelExp);
2922
2923 // (const id [])objects
2924 MsgExprs.push_back(DictValueObjects);
2925
2926 // (const id <NSCopying> [])keys
2927 MsgExprs.push_back(DictKeyObjects);
2928
2929 // (NSUInteger)cnt
2930 Expr *cnt = IntegerLiteral::Create(*Context,
2931 llvm::APInt(UnsignedIntSize, NumElements),
2932 Context->UnsignedIntTy, SourceLocation());
2933 MsgExprs.push_back(Elt: cnt);
2934
2935 SmallVector<QualType, 8> ArgTypes;
2936 ArgTypes.push_back(Elt: Context->getObjCClassType());
2937 ArgTypes.push_back(Elt: Context->getObjCSelType());
2938 for (const auto *PI : DictMethod->parameters()) {
2939 QualType T = PI->getType();
2940 if (const PointerType* PT = T->getAs<PointerType>()) {
2941 QualType PointeeTy = PT->getPointeeType();
2942 convertToUnqualifiedObjCType(T&: PointeeTy);
2943 T = Context->getPointerType(T: PointeeTy);
2944 }
2945 ArgTypes.push_back(Elt: T);
2946 }
2947
2948 QualType returnType = Exp->getType();
2949 // Get the type, we will need to reference it in a couple spots.
2950 QualType msgSendType = MsgSendFlavor->getType();
2951
2952 // Create a reference to the objc_msgSend() declaration.
2953 DeclRefExpr *DRE = new (Context) DeclRefExpr(
2954 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2955
2956 CastExpr *cast = NoTypeInfoCStyleCastExpr(
2957 Ctx: Context, Ty: Context->getPointerType(Context->VoidTy), Kind: CK_BitCast, E: DRE);
2958
2959 // Now do the "normal" pointer to function cast.
2960 QualType castType =
2961 getSimpleFunctionType(result: returnType, args: ArgTypes, variadic: DictMethod->isVariadic());
2962 castType = Context->getPointerType(T: castType);
2963 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2964 cast);
2965
2966 // Don't forget the parens to enforce the proper binding.
2967 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2968
2969 const FunctionType *FT = msgSendType->castAs<FunctionType>();
2970 CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
2971 VK_PRValue, EndLoc, FPOptionsOverride());
2972 ReplaceStmt(Exp, CE);
2973 return CE;
2974}
2975
2976// struct __rw_objc_super {
2977// struct objc_object *object; struct objc_object *superClass;
2978// };
2979QualType RewriteModernObjC::getSuperStructType() {
2980 if (!SuperStructDecl) {
2981 SuperStructDecl = RecordDecl::Create(
2982 *Context, TagTypeKind::Struct, TUDecl, SourceLocation(),
2983 SourceLocation(), &Context->Idents.get(Name: "__rw_objc_super"));
2984 QualType FieldTypes[2];
2985
2986 // struct objc_object *object;
2987 FieldTypes[0] = Context->getObjCIdType();
2988 // struct objc_object *superClass;
2989 FieldTypes[1] = Context->getObjCIdType();
2990
2991 // Create fields
2992 for (unsigned i = 0; i < 2; ++i) {
2993 SuperStructDecl->addDecl(D: FieldDecl::Create(*Context, SuperStructDecl,
2994 SourceLocation(),
2995 SourceLocation(), nullptr,
2996 FieldTypes[i], nullptr,
2997 /*BitWidth=*/nullptr,
2998 /*Mutable=*/false,
2999 ICIS_NoInit));
3000 }
3001
3002 SuperStructDecl->completeDefinition();
3003 }
3004 return Context->getTagDeclType(SuperStructDecl);
3005}
3006
3007QualType RewriteModernObjC::getConstantStringStructType() {
3008 if (!ConstantStringDecl) {
3009 ConstantStringDecl = RecordDecl::Create(
3010 *Context, TagTypeKind::Struct, TUDecl, SourceLocation(),
3011 SourceLocation(), &Context->Idents.get(Name: "__NSConstantStringImpl"));
3012 QualType FieldTypes[4];
3013
3014 // struct objc_object *receiver;
3015 FieldTypes[0] = Context->getObjCIdType();
3016 // int flags;
3017 FieldTypes[1] = Context->IntTy;
3018 // char *str;
3019 FieldTypes[2] = Context->getPointerType(Context->CharTy);
3020 // long length;
3021 FieldTypes[3] = Context->LongTy;
3022
3023 // Create fields
3024 for (unsigned i = 0; i < 4; ++i) {
3025 ConstantStringDecl->addDecl(D: FieldDecl::Create(*Context,
3026 ConstantStringDecl,
3027 SourceLocation(),
3028 SourceLocation(), nullptr,
3029 FieldTypes[i], nullptr,
3030 /*BitWidth=*/nullptr,
3031 /*Mutable=*/true,
3032 ICIS_NoInit));
3033 }
3034
3035 ConstantStringDecl->completeDefinition();
3036 }
3037 return Context->getTagDeclType(ConstantStringDecl);
3038}
3039
3040/// getFunctionSourceLocation - returns start location of a function
3041/// definition. Complication arises when function has declared as
3042/// extern "C" or extern "C" {...}
3043static SourceLocation getFunctionSourceLocation (RewriteModernObjC &R,
3044 FunctionDecl *FD) {
3045 if (FD->isExternC() && !FD->isMain()) {
3046 const DeclContext *DC = FD->getDeclContext();
3047 if (const LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(Val: DC))
3048 // if it is extern "C" {...}, return function decl's own location.
3049 if (!LSD->getRBraceLoc().isValid())
3050 return LSD->getExternLoc();
3051 }
3052 if (FD->getStorageClass() != SC_None)
3053 R.RewriteBlockLiteralFunctionDecl(FD);
3054 return FD->getTypeSpecStartLoc();
3055}
3056
3057void RewriteModernObjC::RewriteLineDirective(const Decl *D) {
3058
3059 SourceLocation Location = D->getLocation();
3060
3061 if (Location.isFileID() && GenerateLineInfo) {
3062 std::string LineString("\n#line ");
3063 PresumedLoc PLoc = SM->getPresumedLoc(Loc: Location);
3064 LineString += utostr(X: PLoc.getLine());
3065 LineString += " \"";
3066 LineString += Lexer::Stringify(Str: PLoc.getFilename());
3067 if (isa<ObjCMethodDecl>(Val: D))
3068 LineString += "\"";
3069 else LineString += "\"\n";
3070
3071 Location = D->getBeginLoc();
3072 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Val: D)) {
3073 if (FD->isExternC() && !FD->isMain()) {
3074 const DeclContext *DC = FD->getDeclContext();
3075 if (const LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(Val: DC))
3076 // if it is extern "C" {...}, return function decl's own location.
3077 if (!LSD->getRBraceLoc().isValid())
3078 Location = LSD->getExternLoc();
3079 }
3080 }
3081 InsertText(Loc: Location, Str: LineString);
3082 }
3083}
3084
3085/// SynthMsgSendStretCallExpr - This routine translates message expression
3086/// into a call to objc_msgSend_stret() entry point. Tricky part is that
3087/// nil check on receiver must be performed before calling objc_msgSend_stret.
3088/// MsgSendStretFlavor - function declaration objc_msgSend_stret(...)
3089/// msgSendType - function type of objc_msgSend_stret(...)
3090/// returnType - Result type of the method being synthesized.
3091/// ArgTypes - type of the arguments passed to objc_msgSend_stret, starting with receiver type.
3092/// MsgExprs - list of argument expressions being passed to objc_msgSend_stret,
3093/// starting with receiver.
3094/// Method - Method being rewritten.
3095Expr *RewriteModernObjC::SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
3096 QualType returnType,
3097 SmallVectorImpl<QualType> &ArgTypes,
3098 SmallVectorImpl<Expr*> &MsgExprs,
3099 ObjCMethodDecl *Method) {
3100 // Now do the "normal" pointer to function cast.
3101 QualType FuncType = getSimpleFunctionType(
3102 result: returnType, args: ArgTypes, variadic: Method ? Method->isVariadic() : false);
3103 QualType castType = Context->getPointerType(T: FuncType);
3104
3105 // build type for containing the objc_msgSend_stret object.
3106 static unsigned stretCount=0;
3107 std::string name = "__Stret"; name += utostr(X: stretCount);
3108 std::string str =
3109 "extern \"C\" void * __cdecl memset(void *_Dst, int _Val, size_t _Size);\n";
3110 str += "namespace {\n";
3111 str += "struct "; str += name;
3112 str += " {\n\t";
3113 str += name;
3114 str += "(id receiver, SEL sel";
3115 for (unsigned i = 2; i < ArgTypes.size(); i++) {
3116 std::string ArgName = "arg"; ArgName += utostr(X: i);
3117 ArgTypes[i].getAsStringInternal(Str&: ArgName, Policy: Context->getPrintingPolicy());
3118 str += ", "; str += ArgName;
3119 }
3120 // could be vararg.
3121 for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); i++) {
3122 std::string ArgName = "arg"; ArgName += utostr(X: i);
3123 MsgExprs[i]->getType().getAsStringInternal(Str&: ArgName,
3124 Policy: Context->getPrintingPolicy());
3125 str += ", "; str += ArgName;
3126 }
3127
3128 str += ") {\n";
3129 str += "\t unsigned size = sizeof(";
3130 str += returnType.getAsString(Policy: Context->getPrintingPolicy()); str += ");\n";
3131
3132 str += "\t if (size == 1 || size == 2 || size == 4 || size == 8)\n";
3133
3134 str += "\t s = (("; str += castType.getAsString(Policy: Context->getPrintingPolicy());
3135 str += ")(void *)objc_msgSend)(receiver, sel";
3136 for (unsigned i = 2; i < ArgTypes.size(); i++) {
3137 str += ", arg"; str += utostr(X: i);
3138 }
3139 // could be vararg.
3140 for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); i++) {
3141 str += ", arg"; str += utostr(X: i);
3142 }
3143 str+= ");\n";
3144
3145 str += "\t else if (receiver == 0)\n";
3146 str += "\t memset((void*)&s, 0, sizeof(s));\n";
3147 str += "\t else\n";
3148
3149 str += "\t s = (("; str += castType.getAsString(Policy: Context->getPrintingPolicy());
3150 str += ")(void *)objc_msgSend_stret)(receiver, sel";
3151 for (unsigned i = 2; i < ArgTypes.size(); i++) {
3152 str += ", arg"; str += utostr(X: i);
3153 }
3154 // could be vararg.
3155 for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); i++) {
3156 str += ", arg"; str += utostr(X: i);
3157 }
3158 str += ");\n";
3159
3160 str += "\t}\n";
3161 str += "\t"; str += returnType.getAsString(Policy: Context->getPrintingPolicy());
3162 str += " s;\n";
3163 str += "};\n};\n\n";
3164 SourceLocation FunLocStart;
3165 if (CurFunctionDef)
3166 FunLocStart = getFunctionSourceLocation(R&: *this, FD: CurFunctionDef);
3167 else {
3168 assert(CurMethodDef && "SynthMsgSendStretCallExpr - CurMethodDef is null");
3169 FunLocStart = CurMethodDef->getBeginLoc();
3170 }
3171
3172 InsertText(Loc: FunLocStart, Str: str);
3173 ++stretCount;
3174
3175 // AST for __Stretn(receiver, args).s;
3176 IdentifierInfo *ID = &Context->Idents.get(Name: name);
3177 FunctionDecl *FD =
3178 FunctionDecl::Create(*Context, TUDecl, SourceLocation(), SourceLocation(),
3179 ID, FuncType, nullptr, SC_Extern, false, false);
3180 DeclRefExpr *DRE = new (Context)
3181 DeclRefExpr(*Context, FD, false, castType, VK_PRValue, SourceLocation());
3182 CallExpr *STCE =
3183 CallExpr::Create(*Context, DRE, MsgExprs, castType, VK_LValue,
3184 SourceLocation(), FPOptionsOverride());
3185
3186 FieldDecl *FieldD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(),
3187 IdLoc: SourceLocation(),
3188 Id: &Context->Idents.get(Name: "s"),
3189 T: returnType, TInfo: nullptr,
3190 /*BitWidth=*/BW: nullptr,
3191 /*Mutable=*/true, InitStyle: ICIS_NoInit);
3192 MemberExpr *ME = MemberExpr::CreateImplicit(
3193 C: *Context, Base: STCE, IsArrow: false, MemberDecl: FieldD, T: FieldD->getType(), VK: VK_LValue, OK: OK_Ordinary);
3194
3195 return ME;
3196}
3197
3198Stmt *RewriteModernObjC::SynthMessageExpr(ObjCMessageExpr *Exp,
3199 SourceLocation StartLoc,
3200 SourceLocation EndLoc) {
3201 if (!SelGetUidFunctionDecl)
3202 SynthSelGetUidFunctionDecl();
3203 if (!MsgSendFunctionDecl)
3204 SynthMsgSendFunctionDecl();
3205 if (!MsgSendSuperFunctionDecl)
3206 SynthMsgSendSuperFunctionDecl();
3207 if (!MsgSendStretFunctionDecl)
3208 SynthMsgSendStretFunctionDecl();
3209 if (!MsgSendSuperStretFunctionDecl)
3210 SynthMsgSendSuperStretFunctionDecl();
3211 if (!MsgSendFpretFunctionDecl)
3212 SynthMsgSendFpretFunctionDecl();
3213 if (!GetClassFunctionDecl)
3214 SynthGetClassFunctionDecl();
3215 if (!GetSuperClassFunctionDecl)
3216 SynthGetSuperClassFunctionDecl();
3217 if (!GetMetaClassFunctionDecl)
3218 SynthGetMetaClassFunctionDecl();
3219
3220 // default to objc_msgSend().
3221 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
3222 // May need to use objc_msgSend_stret() as well.
3223 FunctionDecl *MsgSendStretFlavor = nullptr;
3224 if (ObjCMethodDecl *mDecl = Exp->getMethodDecl()) {
3225 QualType resultType = mDecl->getReturnType();
3226 if (resultType->isRecordType())
3227 MsgSendStretFlavor = MsgSendStretFunctionDecl;
3228 else if (resultType->isRealFloatingType())
3229 MsgSendFlavor = MsgSendFpretFunctionDecl;
3230 }
3231
3232 // Synthesize a call to objc_msgSend().
3233 SmallVector<Expr*, 8> MsgExprs;
3234 switch (Exp->getReceiverKind()) {
3235 case ObjCMessageExpr::SuperClass: {
3236 MsgSendFlavor = MsgSendSuperFunctionDecl;
3237 if (MsgSendStretFlavor)
3238 MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
3239 assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
3240
3241 ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
3242
3243 SmallVector<Expr*, 4> InitExprs;
3244
3245 // set the receiver to self, the first argument to all methods.
3246 InitExprs.push_back(NoTypeInfoCStyleCastExpr(
3247 Context, Context->getObjCIdType(), CK_BitCast,
3248 new (Context) DeclRefExpr(*Context, CurMethodDef->getSelfDecl(), false,
3249 Context->getObjCIdType(), VK_PRValue,
3250 SourceLocation()))); // set the 'receiver'.
3251
3252 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3253 SmallVector<Expr*, 8> ClsExprs;
3254 ClsExprs.push_back(Elt: getStringLiteral(Str: ClassDecl->getIdentifier()->getName()));
3255 // (Class)objc_getClass("CurrentClass")
3256 CallExpr *Cls = SynthesizeCallToFunctionDecl(FD: GetMetaClassFunctionDecl,
3257 Args: ClsExprs, StartLoc, EndLoc);
3258 ClsExprs.clear();
3259 ClsExprs.push_back(Cls);
3260 Cls = SynthesizeCallToFunctionDecl(FD: GetSuperClassFunctionDecl, Args: ClsExprs,
3261 StartLoc, EndLoc);
3262
3263 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3264 // To turn off a warning, type-cast to 'id'
3265 InitExprs.push_back( // set 'super class', using class_getSuperclass().
3266 NoTypeInfoCStyleCastExpr(Context,
3267 Context->getObjCIdType(),
3268 CK_BitCast, Cls));
3269 // struct __rw_objc_super
3270 QualType superType = getSuperStructType();
3271 Expr *SuperRep;
3272
3273 if (LangOpts.MicrosoftExt) {
3274 SynthSuperConstructorFunctionDecl();
3275 // Simulate a constructor call...
3276 DeclRefExpr *DRE = new (Context)
3277 DeclRefExpr(*Context, SuperConstructorFunctionDecl, false, superType,
3278 VK_LValue, SourceLocation());
3279 SuperRep =
3280 CallExpr::Create(*Context, DRE, InitExprs, superType, VK_LValue,
3281 SourceLocation(), FPOptionsOverride());
3282 // The code for super is a little tricky to prevent collision with
3283 // the structure definition in the header. The rewriter has it's own
3284 // internal definition (__rw_objc_super) that is uses. This is why
3285 // we need the cast below. For example:
3286 // (struct __rw_objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
3287 //
3288 SuperRep = UnaryOperator::Create(
3289 C: const_cast<ASTContext &>(*Context), input: SuperRep, opc: UO_AddrOf,
3290 type: Context->getPointerType(T: SuperRep->getType()), VK: VK_PRValue, OK: OK_Ordinary,
3291 l: SourceLocation(), CanOverflow: false, FPFeatures: FPOptionsOverride());
3292 SuperRep = NoTypeInfoCStyleCastExpr(Ctx: Context,
3293 Ty: Context->getPointerType(T: superType),
3294 Kind: CK_BitCast, E: SuperRep);
3295 } else {
3296 // (struct __rw_objc_super) { <exprs from above> }
3297 InitListExpr *ILE =
3298 new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
3299 SourceLocation());
3300 TypeSourceInfo *superTInfo
3301 = Context->getTrivialTypeSourceInfo(T: superType);
3302 SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
3303 superType, VK_LValue,
3304 ILE, false);
3305 // struct __rw_objc_super *
3306 SuperRep = UnaryOperator::Create(
3307 C: const_cast<ASTContext &>(*Context), input: SuperRep, opc: UO_AddrOf,
3308 type: Context->getPointerType(T: SuperRep->getType()), VK: VK_PRValue, OK: OK_Ordinary,
3309 l: SourceLocation(), CanOverflow: false, FPFeatures: FPOptionsOverride());
3310 }
3311 MsgExprs.push_back(Elt: SuperRep);
3312 break;
3313 }
3314
3315 case ObjCMessageExpr::Class: {
3316 SmallVector<Expr*, 8> ClsExprs;
3317 ObjCInterfaceDecl *Class
3318 = Exp->getClassReceiver()->castAs<ObjCObjectType>()->getInterface();
3319 IdentifierInfo *clsName = Class->getIdentifier();
3320 ClsExprs.push_back(getStringLiteral(Str: clsName->getName()));
3321 CallExpr *Cls = SynthesizeCallToFunctionDecl(FD: GetClassFunctionDecl, Args: ClsExprs,
3322 StartLoc, EndLoc);
3323 CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
3324 Context->getObjCIdType(),
3325 CK_BitCast, Cls);
3326 MsgExprs.push_back(ArgExpr);
3327 break;
3328 }
3329
3330 case ObjCMessageExpr::SuperInstance:{
3331 MsgSendFlavor = MsgSendSuperFunctionDecl;
3332 if (MsgSendStretFlavor)
3333 MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
3334 assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
3335 ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
3336 SmallVector<Expr*, 4> InitExprs;
3337
3338 InitExprs.push_back(NoTypeInfoCStyleCastExpr(
3339 Context, Context->getObjCIdType(), CK_BitCast,
3340 new (Context) DeclRefExpr(*Context, CurMethodDef->getSelfDecl(), false,
3341 Context->getObjCIdType(), VK_PRValue,
3342 SourceLocation()))); // set the 'receiver'.
3343
3344 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3345 SmallVector<Expr*, 8> ClsExprs;
3346 ClsExprs.push_back(Elt: getStringLiteral(Str: ClassDecl->getIdentifier()->getName()));
3347 // (Class)objc_getClass("CurrentClass")
3348 CallExpr *Cls = SynthesizeCallToFunctionDecl(FD: GetClassFunctionDecl, Args: ClsExprs,
3349 StartLoc, EndLoc);
3350 ClsExprs.clear();
3351 ClsExprs.push_back(Cls);
3352 Cls = SynthesizeCallToFunctionDecl(FD: GetSuperClassFunctionDecl, Args: ClsExprs,
3353 StartLoc, EndLoc);
3354
3355 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3356 // To turn off a warning, type-cast to 'id'
3357 InitExprs.push_back(
3358 // set 'super class', using class_getSuperclass().
3359 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3360 CK_BitCast, Cls));
3361 // struct __rw_objc_super
3362 QualType superType = getSuperStructType();
3363 Expr *SuperRep;
3364
3365 if (LangOpts.MicrosoftExt) {
3366 SynthSuperConstructorFunctionDecl();
3367 // Simulate a constructor call...
3368 DeclRefExpr *DRE = new (Context)
3369 DeclRefExpr(*Context, SuperConstructorFunctionDecl, false, superType,
3370 VK_LValue, SourceLocation());
3371 SuperRep =
3372 CallExpr::Create(*Context, DRE, InitExprs, superType, VK_LValue,
3373 SourceLocation(), FPOptionsOverride());
3374 // The code for super is a little tricky to prevent collision with
3375 // the structure definition in the header. The rewriter has it's own
3376 // internal definition (__rw_objc_super) that is uses. This is why
3377 // we need the cast below. For example:
3378 // (struct __rw_objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
3379 //
3380 SuperRep = UnaryOperator::Create(
3381 C: const_cast<ASTContext &>(*Context), input: SuperRep, opc: UO_AddrOf,
3382 type: Context->getPointerType(T: SuperRep->getType()), VK: VK_PRValue, OK: OK_Ordinary,
3383 l: SourceLocation(), CanOverflow: false, FPFeatures: FPOptionsOverride());
3384 SuperRep = NoTypeInfoCStyleCastExpr(Ctx: Context,
3385 Ty: Context->getPointerType(T: superType),
3386 Kind: CK_BitCast, E: SuperRep);
3387 } else {
3388 // (struct __rw_objc_super) { <exprs from above> }
3389 InitListExpr *ILE =
3390 new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
3391 SourceLocation());
3392 TypeSourceInfo *superTInfo
3393 = Context->getTrivialTypeSourceInfo(T: superType);
3394 SuperRep = new (Context) CompoundLiteralExpr(
3395 SourceLocation(), superTInfo, superType, VK_PRValue, ILE, false);
3396 }
3397 MsgExprs.push_back(Elt: SuperRep);
3398 break;
3399 }
3400
3401 case ObjCMessageExpr::Instance: {
3402 // Remove all type-casts because it may contain objc-style types; e.g.
3403 // Foo<Proto> *.
3404 Expr *recExpr = Exp->getInstanceReceiver();
3405 while (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(Val: recExpr))
3406 recExpr = CE->getSubExpr();
3407 CastKind CK = recExpr->getType()->isObjCObjectPointerType()
3408 ? CK_BitCast : recExpr->getType()->isBlockPointerType()
3409 ? CK_BlockPointerToObjCPointerCast
3410 : CK_CPointerToObjCPointerCast;
3411
3412 recExpr = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: Context->getObjCIdType(),
3413 Kind: CK, E: recExpr);
3414 MsgExprs.push_back(Elt: recExpr);
3415 break;
3416 }
3417 }
3418
3419 // Create a call to sel_registerName("selName"), it will be the 2nd argument.
3420 SmallVector<Expr*, 8> SelExprs;
3421 SelExprs.push_back(getStringLiteral(Str: Exp->getSelector().getAsString()));
3422 CallExpr *SelExp = SynthesizeCallToFunctionDecl(FD: SelGetUidFunctionDecl,
3423 Args: SelExprs, StartLoc, EndLoc);
3424 MsgExprs.push_back(SelExp);
3425
3426 // Now push any user supplied arguments.
3427 for (unsigned i = 0; i < Exp->getNumArgs(); i++) {
3428 Expr *userExpr = Exp->getArg(Arg: i);
3429 // Make all implicit casts explicit...ICE comes in handy:-)
3430 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(Val: userExpr)) {
3431 // Reuse the ICE type, it is exactly what the doctor ordered.
3432 QualType type = ICE->getType();
3433 if (needToScanForQualifiers(T: type))
3434 type = Context->getObjCIdType();
3435 // Make sure we convert "type (^)(...)" to "type (*)(...)".
3436 (void)convertBlockPointerToFunctionPointer(T&: type);
3437 const Expr *SubExpr = ICE->IgnoreParenImpCasts();
3438 CastKind CK;
3439 if (SubExpr->getType()->isIntegralType(Ctx: *Context) &&
3440 type->isBooleanType()) {
3441 CK = CK_IntegralToBoolean;
3442 } else if (type->isObjCObjectPointerType()) {
3443 if (SubExpr->getType()->isBlockPointerType()) {
3444 CK = CK_BlockPointerToObjCPointerCast;
3445 } else if (SubExpr->getType()->isPointerType()) {
3446 CK = CK_CPointerToObjCPointerCast;
3447 } else {
3448 CK = CK_BitCast;
3449 }
3450 } else {
3451 CK = CK_BitCast;
3452 }
3453
3454 userExpr = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: type, Kind: CK, E: userExpr);
3455 }
3456 // Make id<P...> cast into an 'id' cast.
3457 else if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(Val: userExpr)) {
3458 if (CE->getType()->isObjCQualifiedIdType()) {
3459 while ((CE = dyn_cast<CStyleCastExpr>(Val: userExpr)))
3460 userExpr = CE->getSubExpr();
3461 CastKind CK;
3462 if (userExpr->getType()->isIntegralType(Ctx: *Context)) {
3463 CK = CK_IntegralToPointer;
3464 } else if (userExpr->getType()->isBlockPointerType()) {
3465 CK = CK_BlockPointerToObjCPointerCast;
3466 } else if (userExpr->getType()->isPointerType()) {
3467 CK = CK_CPointerToObjCPointerCast;
3468 } else {
3469 CK = CK_BitCast;
3470 }
3471 userExpr = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: Context->getObjCIdType(),
3472 Kind: CK, E: userExpr);
3473 }
3474 }
3475 MsgExprs.push_back(Elt: userExpr);
3476 // We've transferred the ownership to MsgExprs. For now, we *don't* null
3477 // out the argument in the original expression (since we aren't deleting
3478 // the ObjCMessageExpr). See RewritePropertyOrImplicitSetter() usage for more info.
3479 //Exp->setArg(i, 0);
3480 }
3481 // Generate the funky cast.
3482 CastExpr *cast;
3483 SmallVector<QualType, 8> ArgTypes;
3484 QualType returnType;
3485
3486 // Push 'id' and 'SEL', the 2 implicit arguments.
3487 if (MsgSendFlavor == MsgSendSuperFunctionDecl)
3488 ArgTypes.push_back(Elt: Context->getPointerType(T: getSuperStructType()));
3489 else
3490 ArgTypes.push_back(Elt: Context->getObjCIdType());
3491 ArgTypes.push_back(Elt: Context->getObjCSelType());
3492 if (ObjCMethodDecl *OMD = Exp->getMethodDecl()) {
3493 // Push any user argument types.
3494 for (const auto *PI : OMD->parameters()) {
3495 QualType t = PI->getType()->isObjCQualifiedIdType()
3496 ? Context->getObjCIdType()
3497 : PI->getType();
3498 // Make sure we convert "t (^)(...)" to "t (*)(...)".
3499 (void)convertBlockPointerToFunctionPointer(T&: t);
3500 ArgTypes.push_back(Elt: t);
3501 }
3502 returnType = Exp->getType();
3503 convertToUnqualifiedObjCType(T&: returnType);
3504 (void)convertBlockPointerToFunctionPointer(T&: returnType);
3505 } else {
3506 returnType = Context->getObjCIdType();
3507 }
3508 // Get the type, we will need to reference it in a couple spots.
3509 QualType msgSendType = MsgSendFlavor->getType();
3510
3511 // Create a reference to the objc_msgSend() declaration.
3512 DeclRefExpr *DRE = new (Context) DeclRefExpr(
3513 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
3514
3515 // Need to cast objc_msgSend to "void *" (to workaround a GCC bandaid).
3516 // If we don't do this cast, we get the following bizarre warning/note:
3517 // xx.m:13: warning: function called through a non-compatible type
3518 // xx.m:13: note: if this code is reached, the program will abort
3519 cast = NoTypeInfoCStyleCastExpr(Ctx: Context,
3520 Ty: Context->getPointerType(Context->VoidTy),
3521 Kind: CK_BitCast, E: DRE);
3522
3523 // Now do the "normal" pointer to function cast.
3524 // If we don't have a method decl, force a variadic cast.
3525 const ObjCMethodDecl *MD = Exp->getMethodDecl();
3526 QualType castType =
3527 getSimpleFunctionType(result: returnType, args: ArgTypes, variadic: MD ? MD->isVariadic() : true);
3528 castType = Context->getPointerType(T: castType);
3529 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
3530 cast);
3531
3532 // Don't forget the parens to enforce the proper binding.
3533 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
3534
3535 const FunctionType *FT = msgSendType->castAs<FunctionType>();
3536 CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
3537 VK_PRValue, EndLoc, FPOptionsOverride());
3538 Stmt *ReplacingStmt = CE;
3539 if (MsgSendStretFlavor) {
3540 // We have the method which returns a struct/union. Must also generate
3541 // call to objc_msgSend_stret and hang both varieties on a conditional
3542 // expression which dictate which one to envoke depending on size of
3543 // method's return type.
3544
3545 Expr *STCE = SynthMsgSendStretCallExpr(MsgSendStretFlavor,
3546 returnType,
3547 ArgTypes, MsgExprs,
3548 Method: Exp->getMethodDecl());
3549 ReplacingStmt = STCE;
3550 }
3551 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3552 return ReplacingStmt;
3553}
3554
3555Stmt *RewriteModernObjC::RewriteMessageExpr(ObjCMessageExpr *Exp) {
3556 Stmt *ReplacingStmt =
3557 SynthMessageExpr(Exp, StartLoc: Exp->getBeginLoc(), EndLoc: Exp->getEndLoc());
3558
3559 // Now do the actual rewrite.
3560 ReplaceStmt(Exp, ReplacingStmt);
3561
3562 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3563 return ReplacingStmt;
3564}
3565
3566// typedef struct objc_object Protocol;
3567QualType RewriteModernObjC::getProtocolType() {
3568 if (!ProtocolTypeDecl) {
3569 TypeSourceInfo *TInfo
3570 = Context->getTrivialTypeSourceInfo(T: Context->getObjCIdType());
3571 ProtocolTypeDecl = TypedefDecl::Create(*Context, TUDecl,
3572 SourceLocation(), SourceLocation(),
3573 &Context->Idents.get(Name: "Protocol"),
3574 TInfo);
3575 }
3576 return Context->getTypeDeclType(Decl: ProtocolTypeDecl);
3577}
3578
3579/// RewriteObjCProtocolExpr - Rewrite a protocol expression into
3580/// a synthesized/forward data reference (to the protocol's metadata).
3581/// The forward references (and metadata) are generated in
3582/// RewriteModernObjC::HandleTranslationUnit().
3583Stmt *RewriteModernObjC::RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp) {
3584 std::string Name = "_OBJC_PROTOCOL_REFERENCE_$_" +
3585 Exp->getProtocol()->getNameAsString();
3586 IdentifierInfo *ID = &Context->Idents.get(Name);
3587 VarDecl *VD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
3588 SourceLocation(), ID, getProtocolType(),
3589 nullptr, SC_Extern);
3590 DeclRefExpr *DRE = new (Context) DeclRefExpr(
3591 *Context, VD, false, getProtocolType(), VK_LValue, SourceLocation());
3592 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(
3593 Ctx: Context, Ty: Context->getPointerType(DRE->getType()), Kind: CK_BitCast, E: DRE);
3594 ReplaceStmt(Exp, castExpr);
3595 ProtocolExprDecls.insert(Ptr: Exp->getProtocol()->getCanonicalDecl());
3596 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3597 return castExpr;
3598}
3599
3600/// IsTagDefinedInsideClass - This routine checks that a named tagged type
3601/// is defined inside an objective-c class. If so, it returns true.
3602bool RewriteModernObjC::IsTagDefinedInsideClass(ObjCContainerDecl *IDecl,
3603 TagDecl *Tag,
3604 bool &IsNamedDefinition) {
3605 if (!IDecl)
3606 return false;
3607 SourceLocation TagLocation;
3608 if (RecordDecl *RD = dyn_cast<RecordDecl>(Val: Tag)) {
3609 RD = RD->getDefinition();
3610 if (!RD || !RD->getDeclName().getAsIdentifierInfo())
3611 return false;
3612 IsNamedDefinition = true;
3613 TagLocation = RD->getLocation();
3614 return Context->getSourceManager().isBeforeInTranslationUnit(
3615 LHS: IDecl->getLocation(), RHS: TagLocation);
3616 }
3617 if (EnumDecl *ED = dyn_cast<EnumDecl>(Val: Tag)) {
3618 if (!ED || !ED->getDeclName().getAsIdentifierInfo())
3619 return false;
3620 IsNamedDefinition = true;
3621 TagLocation = ED->getLocation();
3622 return Context->getSourceManager().isBeforeInTranslationUnit(
3623 LHS: IDecl->getLocation(), RHS: TagLocation);
3624 }
3625 return false;
3626}
3627
3628/// RewriteObjCFieldDeclType - This routine rewrites a type into the buffer.
3629/// It handles elaborated types, as well as enum types in the process.
3630bool RewriteModernObjC::RewriteObjCFieldDeclType(QualType &Type,
3631 std::string &Result) {
3632 if (Type->getAs<TypedefType>()) {
3633 Result += "\t";
3634 return false;
3635 }
3636
3637 if (Type->isArrayType()) {
3638 QualType ElemTy = Context->getBaseElementType(QT: Type);
3639 return RewriteObjCFieldDeclType(Type&: ElemTy, Result);
3640 }
3641 else if (Type->isRecordType()) {
3642 RecordDecl *RD = Type->castAs<RecordType>()->getDecl();
3643 if (RD->isCompleteDefinition()) {
3644 if (RD->isStruct())
3645 Result += "\n\tstruct ";
3646 else if (RD->isUnion())
3647 Result += "\n\tunion ";
3648 else
3649 assert(false && "class not allowed as an ivar type");
3650
3651 Result += RD->getName();
3652 if (GlobalDefinedTags.count(RD)) {
3653 // struct/union is defined globally, use it.
3654 Result += " ";
3655 return true;
3656 }
3657 Result += " {\n";
3658 for (auto *FD : RD->fields())
3659 RewriteObjCFieldDecl(fieldDecl: FD, Result);
3660 Result += "\t} ";
3661 return true;
3662 }
3663 }
3664 else if (Type->isEnumeralType()) {
3665 EnumDecl *ED = Type->castAs<EnumType>()->getDecl();
3666 if (ED->isCompleteDefinition()) {
3667 Result += "\n\tenum ";
3668 Result += ED->getName();
3669 if (GlobalDefinedTags.count(ED)) {
3670 // Enum is globall defined, use it.
3671 Result += " ";
3672 return true;
3673 }
3674
3675 Result += " {\n";
3676 for (const auto *EC : ED->enumerators()) {
3677 Result += "\t"; Result += EC->getName(); Result += " = ";
3678 Result += toString(I: EC->getInitVal(), Radix: 10);
3679 Result += ",\n";
3680 }
3681 Result += "\t} ";
3682 return true;
3683 }
3684 }
3685
3686 Result += "\t";
3687 convertObjCTypeToCStyleType(T&: Type);
3688 return false;
3689}
3690
3691
3692/// RewriteObjCFieldDecl - This routine rewrites a field into the buffer.
3693/// It handles elaborated types, as well as enum types in the process.
3694void RewriteModernObjC::RewriteObjCFieldDecl(FieldDecl *fieldDecl,
3695 std::string &Result) {
3696 QualType Type = fieldDecl->getType();
3697 std::string Name = fieldDecl->getNameAsString();
3698
3699 bool EleboratedType = RewriteObjCFieldDeclType(Type, Result);
3700 if (!EleboratedType)
3701 Type.getAsStringInternal(Str&: Name, Policy: Context->getPrintingPolicy());
3702 Result += Name;
3703 if (fieldDecl->isBitField()) {
3704 Result += " : "; Result += utostr(X: fieldDecl->getBitWidthValue(Ctx: *Context));
3705 }
3706 else if (EleboratedType && Type->isArrayType()) {
3707 const ArrayType *AT = Context->getAsArrayType(T: Type);
3708 do {
3709 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(Val: AT)) {
3710 Result += "[";
3711 llvm::APInt Dim = CAT->getSize();
3712 Result += utostr(X: Dim.getZExtValue());
3713 Result += "]";
3714 }
3715 AT = Context->getAsArrayType(T: AT->getElementType());
3716 } while (AT);
3717 }
3718
3719 Result += ";\n";
3720}
3721
3722/// RewriteLocallyDefinedNamedAggregates - This routine rewrites locally defined
3723/// named aggregate types into the input buffer.
3724void RewriteModernObjC::RewriteLocallyDefinedNamedAggregates(FieldDecl *fieldDecl,
3725 std::string &Result) {
3726 QualType Type = fieldDecl->getType();
3727 if (Type->getAs<TypedefType>())
3728 return;
3729 if (Type->isArrayType())
3730 Type = Context->getBaseElementType(QT: Type);
3731
3732 auto *IDecl = dyn_cast<ObjCContainerDecl>(fieldDecl->getDeclContext());
3733
3734 TagDecl *TD = nullptr;
3735 if (Type->isRecordType()) {
3736 TD = Type->castAs<RecordType>()->getDecl();
3737 }
3738 else if (Type->isEnumeralType()) {
3739 TD = Type->castAs<EnumType>()->getDecl();
3740 }
3741
3742 if (TD) {
3743 if (GlobalDefinedTags.count(Ptr: TD))
3744 return;
3745
3746 bool IsNamedDefinition = false;
3747 if (IsTagDefinedInsideClass(IDecl: IDecl, Tag: TD, IsNamedDefinition)) {
3748 RewriteObjCFieldDeclType(Type, Result);
3749 Result += ";";
3750 }
3751 if (IsNamedDefinition)
3752 GlobalDefinedTags.insert(Ptr: TD);
3753 }
3754}
3755
3756unsigned RewriteModernObjC::ObjCIvarBitfieldGroupNo(ObjCIvarDecl *IV) {
3757 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3758 if (ObjCInterefaceHasBitfieldGroups.count(V: CDecl)) {
3759 return IvarGroupNumber[IV];
3760 }
3761 unsigned GroupNo = 0;
3762 SmallVector<const ObjCIvarDecl *, 8> IVars;
3763 for (const ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3764 IVD; IVD = IVD->getNextIvar())
3765 IVars.push_back(Elt: IVD);
3766
3767 for (unsigned i = 0, e = IVars.size(); i < e; i++)
3768 if (IVars[i]->isBitField()) {
3769 IvarGroupNumber[IVars[i++]] = ++GroupNo;
3770 while (i < e && IVars[i]->isBitField())
3771 IvarGroupNumber[IVars[i++]] = GroupNo;
3772 if (i < e)
3773 --i;
3774 }
3775
3776 ObjCInterefaceHasBitfieldGroups.insert(V: CDecl);
3777 return IvarGroupNumber[IV];
3778}
3779
3780QualType RewriteModernObjC::SynthesizeBitfieldGroupStructType(
3781 ObjCIvarDecl *IV,
3782 SmallVectorImpl<ObjCIvarDecl *> &IVars) {
3783 std::string StructTagName;
3784 ObjCIvarBitfieldGroupType(IV, Result&: StructTagName);
3785 RecordDecl *RD = RecordDecl::Create(
3786 *Context, TagTypeKind::Struct, Context->getTranslationUnitDecl(),
3787 SourceLocation(), SourceLocation(), &Context->Idents.get(Name: StructTagName));
3788 for (unsigned i=0, e = IVars.size(); i < e; i++) {
3789 ObjCIvarDecl *Ivar = IVars[i];
3790 RD->addDecl(D: FieldDecl::Create(C: *Context, DC: RD, StartLoc: SourceLocation(), IdLoc: SourceLocation(),
3791 Id: &Context->Idents.get(Ivar->getName()),
3792 T: Ivar->getType(),
3793 TInfo: nullptr, /*Expr *BW */BW: Ivar->getBitWidth(),
3794 Mutable: false, InitStyle: ICIS_NoInit));
3795 }
3796 RD->completeDefinition();
3797 return Context->getTagDeclType(RD);
3798}
3799
3800QualType RewriteModernObjC::GetGroupRecordTypeForObjCIvarBitfield(ObjCIvarDecl *IV) {
3801 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3802 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3803 std::pair<const ObjCInterfaceDecl*, unsigned> tuple = std::make_pair(x&: CDecl, y&: GroupNo);
3804 if (GroupRecordType.count(Val: tuple))
3805 return GroupRecordType[tuple];
3806
3807 SmallVector<ObjCIvarDecl *, 8> IVars;
3808 for (const ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3809 IVD; IVD = IVD->getNextIvar()) {
3810 if (IVD->isBitField())
3811 IVars.push_back(Elt: const_cast<ObjCIvarDecl *>(IVD));
3812 else {
3813 if (!IVars.empty()) {
3814 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV: IVars[0]);
3815 // Generate the struct type for this group of bitfield ivars.
3816 GroupRecordType[std::make_pair(x&: CDecl, y&: GroupNo)] =
3817 SynthesizeBitfieldGroupStructType(IV: IVars[0], IVars);
3818 IVars.clear();
3819 }
3820 }
3821 }
3822 if (!IVars.empty()) {
3823 // Do the last one.
3824 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV: IVars[0]);
3825 GroupRecordType[std::make_pair(x&: CDecl, y&: GroupNo)] =
3826 SynthesizeBitfieldGroupStructType(IV: IVars[0], IVars);
3827 }
3828 QualType RetQT = GroupRecordType[tuple];
3829 assert(!RetQT.isNull() && "GetGroupRecordTypeForObjCIvarBitfield struct type is NULL");
3830
3831 return RetQT;
3832}
3833
3834/// ObjCIvarBitfieldGroupDecl - Names field decl. for ivar bitfield group.
3835/// Name would be: classname__GRBF_n where n is the group number for this ivar.
3836void RewriteModernObjC::ObjCIvarBitfieldGroupDecl(ObjCIvarDecl *IV,
3837 std::string &Result) {
3838 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3839 Result += CDecl->getName();
3840 Result += "__GRBF_";
3841 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3842 Result += utostr(X: GroupNo);
3843}
3844
3845/// ObjCIvarBitfieldGroupType - Names struct type for ivar bitfield group.
3846/// Name of the struct would be: classname__T_n where n is the group number for
3847/// this ivar.
3848void RewriteModernObjC::ObjCIvarBitfieldGroupType(ObjCIvarDecl *IV,
3849 std::string &Result) {
3850 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3851 Result += CDecl->getName();
3852 Result += "__T_";
3853 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3854 Result += utostr(X: GroupNo);
3855}
3856
3857/// ObjCIvarBitfieldGroupOffset - Names symbol for ivar bitfield group field offset.
3858/// Name would be: OBJC_IVAR_$_classname__GRBF_n where n is the group number for
3859/// this ivar.
3860void RewriteModernObjC::ObjCIvarBitfieldGroupOffset(ObjCIvarDecl *IV,
3861 std::string &Result) {
3862 Result += "OBJC_IVAR_$_";
3863 ObjCIvarBitfieldGroupDecl(IV, Result);
3864}
3865
3866#define SKIP_BITFIELDS(IX, ENDIX, VEC) { \
3867 while ((IX < ENDIX) && VEC[IX]->isBitField()) \
3868 ++IX; \
3869 if (IX < ENDIX) \
3870 --IX; \
3871}
3872
3873/// RewriteObjCInternalStruct - Rewrite one internal struct corresponding to
3874/// an objective-c class with ivars.
3875void RewriteModernObjC::RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
3876 std::string &Result) {
3877 assert(CDecl && "Class missing in SynthesizeObjCInternalStruct");
3878 assert(CDecl->getName() != "" &&
3879 "Name missing in SynthesizeObjCInternalStruct");
3880 ObjCInterfaceDecl *RCDecl = CDecl->getSuperClass();
3881 SmallVector<ObjCIvarDecl *, 8> IVars;
3882 for (ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3883 IVD; IVD = IVD->getNextIvar())
3884 IVars.push_back(Elt: IVD);
3885
3886 SourceLocation LocStart = CDecl->getBeginLoc();
3887 SourceLocation LocEnd = CDecl->getEndOfDefinitionLoc();
3888
3889 const char *startBuf = SM->getCharacterData(SL: LocStart);
3890 const char *endBuf = SM->getCharacterData(SL: LocEnd);
3891
3892 // If no ivars and no root or if its root, directly or indirectly,
3893 // have no ivars (thus not synthesized) then no need to synthesize this class.
3894 if ((!CDecl->isThisDeclarationADefinition() || IVars.size() == 0) &&
3895 (!RCDecl || !ObjCSynthesizedStructs.count(Ptr: RCDecl))) {
3896 endBuf += Lexer::MeasureTokenLength(Loc: LocEnd, SM: *SM, LangOpts);
3897 ReplaceText(Start: LocStart, OrigLength: endBuf-startBuf, Str: Result);
3898 return;
3899 }
3900
3901 // Insert named struct/union definitions inside class to
3902 // outer scope. This follows semantics of locally defined
3903 // struct/unions in objective-c classes.
3904 for (unsigned i = 0, e = IVars.size(); i < e; i++)
3905 RewriteLocallyDefinedNamedAggregates(IVars[i], Result);
3906
3907 // Insert named structs which are syntheized to group ivar bitfields
3908 // to outer scope as well.
3909 for (unsigned i = 0, e = IVars.size(); i < e; i++)
3910 if (IVars[i]->isBitField()) {
3911 ObjCIvarDecl *IV = IVars[i];
3912 QualType QT = GetGroupRecordTypeForObjCIvarBitfield(IV);
3913 RewriteObjCFieldDeclType(Type&: QT, Result);
3914 Result += ";";
3915 // skip over ivar bitfields in this group.
3916 SKIP_BITFIELDS(i , e, IVars);
3917 }
3918
3919 Result += "\nstruct ";
3920 Result += CDecl->getNameAsString();
3921 Result += "_IMPL {\n";
3922
3923 if (RCDecl && ObjCSynthesizedStructs.count(Ptr: RCDecl)) {
3924 Result += "\tstruct "; Result += RCDecl->getNameAsString();
3925 Result += "_IMPL "; Result += RCDecl->getNameAsString();
3926 Result += "_IVARS;\n";
3927 }
3928
3929 for (unsigned i = 0, e = IVars.size(); i < e; i++) {
3930 if (IVars[i]->isBitField()) {
3931 ObjCIvarDecl *IV = IVars[i];
3932 Result += "\tstruct ";
3933 ObjCIvarBitfieldGroupType(IV, Result); Result += " ";
3934 ObjCIvarBitfieldGroupDecl(IV, Result); Result += ";\n";
3935 // skip over ivar bitfields in this group.
3936 SKIP_BITFIELDS(i , e, IVars);
3937 }
3938 else
3939 RewriteObjCFieldDecl(IVars[i], Result);
3940 }
3941
3942 Result += "};\n";
3943 endBuf += Lexer::MeasureTokenLength(Loc: LocEnd, SM: *SM, LangOpts);
3944 ReplaceText(Start: LocStart, OrigLength: endBuf-startBuf, Str: Result);
3945 // Mark this struct as having been generated.
3946 if (!ObjCSynthesizedStructs.insert(Ptr: CDecl).second)
3947 llvm_unreachable("struct already synthesize- RewriteObjCInternalStruct");
3948}
3949
3950/// RewriteIvarOffsetSymbols - Rewrite ivar offset symbols of those ivars which
3951/// have been referenced in an ivar access expression.
3952void RewriteModernObjC::RewriteIvarOffsetSymbols(ObjCInterfaceDecl *CDecl,
3953 std::string &Result) {
3954 // write out ivar offset symbols which have been referenced in an ivar
3955 // access expression.
3956 llvm::SmallSetVector<ObjCIvarDecl *, 8> Ivars = ReferencedIvars[CDecl];
3957
3958 if (Ivars.empty())
3959 return;
3960
3961 llvm::DenseSet<std::pair<const ObjCInterfaceDecl*, unsigned> > GroupSymbolOutput;
3962 for (ObjCIvarDecl *IvarDecl : Ivars) {
3963 const ObjCInterfaceDecl *IDecl = IvarDecl->getContainingInterface();
3964 unsigned GroupNo = 0;
3965 if (IvarDecl->isBitField()) {
3966 GroupNo = ObjCIvarBitfieldGroupNo(IV: IvarDecl);
3967 if (GroupSymbolOutput.count(V: std::make_pair(x&: IDecl, y&: GroupNo)))
3968 continue;
3969 }
3970 Result += "\n";
3971 if (LangOpts.MicrosoftExt)
3972 Result += "__declspec(allocate(\".objc_ivar$B\")) ";
3973 Result += "extern \"C\" ";
3974 if (LangOpts.MicrosoftExt &&
3975 IvarDecl->getAccessControl() != ObjCIvarDecl::Private &&
3976 IvarDecl->getAccessControl() != ObjCIvarDecl::Package)
3977 Result += "__declspec(dllimport) ";
3978
3979 Result += "unsigned long ";
3980 if (IvarDecl->isBitField()) {
3981 ObjCIvarBitfieldGroupOffset(IV: IvarDecl, Result);
3982 GroupSymbolOutput.insert(V: std::make_pair(x&: IDecl, y&: GroupNo));
3983 }
3984 else
3985 WriteInternalIvarName(IDecl: CDecl, IvarDecl, Result);
3986 Result += ";";
3987 }
3988}
3989
3990//===----------------------------------------------------------------------===//
3991// Meta Data Emission
3992//===----------------------------------------------------------------------===//
3993
3994/// RewriteImplementations - This routine rewrites all method implementations
3995/// and emits meta-data.
3996
3997void RewriteModernObjC::RewriteImplementations() {
3998 int ClsDefCount = ClassImplementation.size();
3999 int CatDefCount = CategoryImplementation.size();
4000
4001 // Rewrite implemented methods
4002 for (int i = 0; i < ClsDefCount; i++) {
4003 ObjCImplementationDecl *OIMP = ClassImplementation[i];
4004 ObjCInterfaceDecl *CDecl = OIMP->getClassInterface();
4005 if (CDecl->isImplicitInterfaceDecl())
4006 assert(false &&
4007 "Legacy implicit interface rewriting not supported in moder abi");
4008 RewriteImplementationDecl(OIMP);
4009 }
4010
4011 for (int i = 0; i < CatDefCount; i++) {
4012 ObjCCategoryImplDecl *CIMP = CategoryImplementation[i];
4013 ObjCInterfaceDecl *CDecl = CIMP->getClassInterface();
4014 if (CDecl->isImplicitInterfaceDecl())
4015 assert(false &&
4016 "Legacy implicit interface rewriting not supported in moder abi");
4017 RewriteImplementationDecl(CIMP);
4018 }
4019}
4020
4021void RewriteModernObjC::RewriteByRefString(std::string &ResultStr,
4022 const std::string &Name,
4023 ValueDecl *VD, bool def) {
4024 assert(BlockByRefDeclNo.count(VD) &&
4025 "RewriteByRefString: ByRef decl missing");
4026 if (def)
4027 ResultStr += "struct ";
4028 ResultStr += "__Block_byref_" + Name +
4029 "_" + utostr(X: BlockByRefDeclNo[VD]) ;
4030}
4031
4032static bool HasLocalVariableExternalStorage(ValueDecl *VD) {
4033 if (VarDecl *Var = dyn_cast<VarDecl>(Val: VD))
4034 return (Var->isFunctionOrMethodVarDecl() && !Var->hasLocalStorage());
4035 return false;
4036}
4037
4038std::string RewriteModernObjC::SynthesizeBlockFunc(BlockExpr *CE, int i,
4039 StringRef funcName,
4040 std::string Tag) {
4041 const FunctionType *AFT = CE->getFunctionType();
4042 QualType RT = AFT->getReturnType();
4043 std::string StructRef = "struct " + Tag;
4044 SourceLocation BlockLoc = CE->getExprLoc();
4045 std::string S;
4046 ConvertSourceLocationToLineDirective(Loc: BlockLoc, LineString&: S);
4047
4048 S += "static " + RT.getAsString(Policy: Context->getPrintingPolicy()) + " __" +
4049 funcName.str() + "_block_func_" + utostr(X: i);
4050
4051 BlockDecl *BD = CE->getBlockDecl();
4052
4053 if (isa<FunctionNoProtoType>(Val: AFT)) {
4054 // No user-supplied arguments. Still need to pass in a pointer to the
4055 // block (to reference imported block decl refs).
4056 S += "(" + StructRef + " *__cself)";
4057 } else if (BD->param_empty()) {
4058 S += "(" + StructRef + " *__cself)";
4059 } else {
4060 const FunctionProtoType *FT = cast<FunctionProtoType>(Val: AFT);
4061 assert(FT && "SynthesizeBlockFunc: No function proto");
4062 S += '(';
4063 // first add the implicit argument.
4064 S += StructRef + " *__cself, ";
4065 std::string ParamStr;
4066 for (BlockDecl::param_iterator AI = BD->param_begin(),
4067 E = BD->param_end(); AI != E; ++AI) {
4068 if (AI != BD->param_begin()) S += ", ";
4069 ParamStr = (*AI)->getNameAsString();
4070 QualType QT = (*AI)->getType();
4071 (void)convertBlockPointerToFunctionPointer(T&: QT);
4072 QT.getAsStringInternal(Str&: ParamStr, Policy: Context->getPrintingPolicy());
4073 S += ParamStr;
4074 }
4075 if (FT->isVariadic()) {
4076 if (!BD->param_empty()) S += ", ";
4077 S += "...";
4078 }
4079 S += ')';
4080 }
4081 S += " {\n";
4082
4083 // Create local declarations to avoid rewriting all closure decl ref exprs.
4084 // First, emit a declaration for all "by ref" decls.
4085 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4086 E = BlockByRefDecls.end(); I != E; ++I) {
4087 S += " ";
4088 std::string Name = (*I)->getNameAsString();
4089 std::string TypeString;
4090 RewriteByRefString(ResultStr&: TypeString, Name, VD: (*I));
4091 TypeString += " *";
4092 Name = TypeString + Name;
4093 S += Name + " = __cself->" + (*I)->getNameAsString() + "; // bound by ref\n";
4094 }
4095 // Next, emit a declaration for all "by copy" declarations.
4096 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4097 E = BlockByCopyDecls.end(); I != E; ++I) {
4098 S += " ";
4099 // Handle nested closure invocation. For example:
4100 //
4101 // void (^myImportedClosure)(void);
4102 // myImportedClosure = ^(void) { setGlobalInt(x + y); };
4103 //
4104 // void (^anotherClosure)(void);
4105 // anotherClosure = ^(void) {
4106 // myImportedClosure(); // import and invoke the closure
4107 // };
4108 //
4109 if (isTopLevelBlockPointerType(T: (*I)->getType())) {
4110 RewriteBlockPointerTypeVariable(Str&: S, VD: (*I));
4111 S += " = (";
4112 RewriteBlockPointerType(Str&: S, Type: (*I)->getType());
4113 S += ")";
4114 S += "__cself->" + (*I)->getNameAsString() + "; // bound by copy\n";
4115 }
4116 else {
4117 std::string Name = (*I)->getNameAsString();
4118 QualType QT = (*I)->getType();
4119 if (HasLocalVariableExternalStorage(VD: *I))
4120 QT = Context->getPointerType(T: QT);
4121 QT.getAsStringInternal(Str&: Name, Policy: Context->getPrintingPolicy());
4122 S += Name + " = __cself->" +
4123 (*I)->getNameAsString() + "; // bound by copy\n";
4124 }
4125 }
4126 std::string RewrittenStr = RewrittenBlockExprs[CE];
4127 const char *cstr = RewrittenStr.c_str();
4128 while (*cstr++ != '{') ;
4129 S += cstr;
4130 S += "\n";
4131 return S;
4132}
4133
4134std::string RewriteModernObjC::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
4135 StringRef funcName,
4136 std::string Tag) {
4137 std::string StructRef = "struct " + Tag;
4138 std::string S = "static void __";
4139
4140 S += funcName;
4141 S += "_block_copy_" + utostr(X: i);
4142 S += "(" + StructRef;
4143 S += "*dst, " + StructRef;
4144 S += "*src) {";
4145 for (ValueDecl *VD : ImportedBlockDecls) {
4146 S += "_Block_object_assign((void*)&dst->";
4147 S += VD->getNameAsString();
4148 S += ", (void*)src->";
4149 S += VD->getNameAsString();
4150 if (BlockByRefDeclsPtrSet.count(Ptr: VD))
4151 S += ", " + utostr(X: BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
4152 else if (VD->getType()->isBlockPointerType())
4153 S += ", " + utostr(X: BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
4154 else
4155 S += ", " + utostr(X: BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
4156 }
4157 S += "}\n";
4158
4159 S += "\nstatic void __";
4160 S += funcName;
4161 S += "_block_dispose_" + utostr(X: i);
4162 S += "(" + StructRef;
4163 S += "*src) {";
4164 for (ValueDecl *VD : ImportedBlockDecls) {
4165 S += "_Block_object_dispose((void*)src->";
4166 S += VD->getNameAsString();
4167 if (BlockByRefDeclsPtrSet.count(Ptr: VD))
4168 S += ", " + utostr(X: BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
4169 else if (VD->getType()->isBlockPointerType())
4170 S += ", " + utostr(X: BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
4171 else
4172 S += ", " + utostr(X: BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
4173 }
4174 S += "}\n";
4175 return S;
4176}
4177
4178std::string RewriteModernObjC::SynthesizeBlockImpl(BlockExpr *CE, std::string Tag,
4179 std::string Desc) {
4180 std::string S = "\nstruct " + Tag;
4181 std::string Constructor = " " + Tag;
4182
4183 S += " {\n struct __block_impl impl;\n";
4184 S += " struct " + Desc;
4185 S += "* Desc;\n";
4186
4187 Constructor += "(void *fp, "; // Invoke function pointer.
4188 Constructor += "struct " + Desc; // Descriptor pointer.
4189 Constructor += " *desc";
4190
4191 if (BlockDeclRefs.size()) {
4192 // Output all "by copy" declarations.
4193 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4194 E = BlockByCopyDecls.end(); I != E; ++I) {
4195 S += " ";
4196 std::string FieldName = (*I)->getNameAsString();
4197 std::string ArgName = "_" + FieldName;
4198 // Handle nested closure invocation. For example:
4199 //
4200 // void (^myImportedBlock)(void);
4201 // myImportedBlock = ^(void) { setGlobalInt(x + y); };
4202 //
4203 // void (^anotherBlock)(void);
4204 // anotherBlock = ^(void) {
4205 // myImportedBlock(); // import and invoke the closure
4206 // };
4207 //
4208 if (isTopLevelBlockPointerType(T: (*I)->getType())) {
4209 S += "struct __block_impl *";
4210 Constructor += ", void *" + ArgName;
4211 } else {
4212 QualType QT = (*I)->getType();
4213 if (HasLocalVariableExternalStorage(VD: *I))
4214 QT = Context->getPointerType(T: QT);
4215 QT.getAsStringInternal(Str&: FieldName, Policy: Context->getPrintingPolicy());
4216 QT.getAsStringInternal(Str&: ArgName, Policy: Context->getPrintingPolicy());
4217 Constructor += ", " + ArgName;
4218 }
4219 S += FieldName + ";\n";
4220 }
4221 // Output all "by ref" declarations.
4222 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4223 E = BlockByRefDecls.end(); I != E; ++I) {
4224 S += " ";
4225 std::string FieldName = (*I)->getNameAsString();
4226 std::string ArgName = "_" + FieldName;
4227 {
4228 std::string TypeString;
4229 RewriteByRefString(ResultStr&: TypeString, Name: FieldName, VD: (*I));
4230 TypeString += " *";
4231 FieldName = TypeString + FieldName;
4232 ArgName = TypeString + ArgName;
4233 Constructor += ", " + ArgName;
4234 }
4235 S += FieldName + "; // by ref\n";
4236 }
4237 // Finish writing the constructor.
4238 Constructor += ", int flags=0)";
4239 // Initialize all "by copy" arguments.
4240 bool firsTime = true;
4241 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4242 E = BlockByCopyDecls.end(); I != E; ++I) {
4243 std::string Name = (*I)->getNameAsString();
4244 if (firsTime) {
4245 Constructor += " : ";
4246 firsTime = false;
4247 }
4248 else
4249 Constructor += ", ";
4250 if (isTopLevelBlockPointerType(T: (*I)->getType()))
4251 Constructor += Name + "((struct __block_impl *)_" + Name + ")";
4252 else
4253 Constructor += Name + "(_" + Name + ")";
4254 }
4255 // Initialize all "by ref" arguments.
4256 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4257 E = BlockByRefDecls.end(); I != E; ++I) {
4258 std::string Name = (*I)->getNameAsString();
4259 if (firsTime) {
4260 Constructor += " : ";
4261 firsTime = false;
4262 }
4263 else
4264 Constructor += ", ";
4265 Constructor += Name + "(_" + Name + "->__forwarding)";
4266 }
4267
4268 Constructor += " {\n";
4269 if (GlobalVarDecl)
4270 Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
4271 else
4272 Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
4273 Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
4274
4275 Constructor += " Desc = desc;\n";
4276 } else {
4277 // Finish writing the constructor.
4278 Constructor += ", int flags=0) {\n";
4279 if (GlobalVarDecl)
4280 Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
4281 else
4282 Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
4283 Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
4284 Constructor += " Desc = desc;\n";
4285 }
4286 Constructor += " ";
4287 Constructor += "}\n";
4288 S += Constructor;
4289 S += "};\n";
4290 return S;
4291}
4292
4293std::string RewriteModernObjC::SynthesizeBlockDescriptor(std::string DescTag,
4294 std::string ImplTag, int i,
4295 StringRef FunName,
4296 unsigned hasCopy) {
4297 std::string S = "\nstatic struct " + DescTag;
4298
4299 S += " {\n size_t reserved;\n";
4300 S += " size_t Block_size;\n";
4301 if (hasCopy) {
4302 S += " void (*copy)(struct ";
4303 S += ImplTag; S += "*, struct ";
4304 S += ImplTag; S += "*);\n";
4305
4306 S += " void (*dispose)(struct ";
4307 S += ImplTag; S += "*);\n";
4308 }
4309 S += "} ";
4310
4311 S += DescTag + "_DATA = { 0, sizeof(struct ";
4312 S += ImplTag + ")";
4313 if (hasCopy) {
4314 S += ", __" + FunName.str() + "_block_copy_" + utostr(X: i);
4315 S += ", __" + FunName.str() + "_block_dispose_" + utostr(X: i);
4316 }
4317 S += "};\n";
4318 return S;
4319}
4320
4321void RewriteModernObjC::SynthesizeBlockLiterals(SourceLocation FunLocStart,
4322 StringRef FunName) {
4323 bool RewriteSC = (GlobalVarDecl &&
4324 !Blocks.empty() &&
4325 GlobalVarDecl->getStorageClass() == SC_Static &&
4326 GlobalVarDecl->getType().getCVRQualifiers());
4327 if (RewriteSC) {
4328 std::string SC(" void __");
4329 SC += GlobalVarDecl->getNameAsString();
4330 SC += "() {}";
4331 InsertText(Loc: FunLocStart, Str: SC);
4332 }
4333
4334 // Insert closures that were part of the function.
4335 for (unsigned i = 0, count=0; i < Blocks.size(); i++) {
4336 CollectBlockDeclRefInfo(Exp: Blocks[i]);
4337 // Need to copy-in the inner copied-in variables not actually used in this
4338 // block.
4339 for (int j = 0; j < InnerDeclRefsCount[i]; j++) {
4340 DeclRefExpr *Exp = InnerDeclRefs[count++];
4341 ValueDecl *VD = Exp->getDecl();
4342 BlockDeclRefs.push_back(Elt: Exp);
4343 if (!VD->hasAttr<BlocksAttr>()) {
4344 if (!BlockByCopyDeclsPtrSet.count(Ptr: VD)) {
4345 BlockByCopyDeclsPtrSet.insert(Ptr: VD);
4346 BlockByCopyDecls.push_back(Elt: VD);
4347 }
4348 continue;
4349 }
4350
4351 if (!BlockByRefDeclsPtrSet.count(Ptr: VD)) {
4352 BlockByRefDeclsPtrSet.insert(Ptr: VD);
4353 BlockByRefDecls.push_back(Elt: VD);
4354 }
4355
4356 // imported objects in the inner blocks not used in the outer
4357 // blocks must be copied/disposed in the outer block as well.
4358 if (VD->getType()->isObjCObjectPointerType() ||
4359 VD->getType()->isBlockPointerType())
4360 ImportedBlockDecls.insert(Ptr: VD);
4361 }
4362
4363 std::string ImplTag = "__" + FunName.str() + "_block_impl_" + utostr(X: i);
4364 std::string DescTag = "__" + FunName.str() + "_block_desc_" + utostr(X: i);
4365
4366 std::string CI = SynthesizeBlockImpl(CE: Blocks[i], Tag: ImplTag, Desc: DescTag);
4367
4368 InsertText(Loc: FunLocStart, Str: CI);
4369
4370 std::string CF = SynthesizeBlockFunc(CE: Blocks[i], i, funcName: FunName, Tag: ImplTag);
4371
4372 InsertText(Loc: FunLocStart, Str: CF);
4373
4374 if (ImportedBlockDecls.size()) {
4375 std::string HF = SynthesizeBlockHelperFuncs(CE: Blocks[i], i, funcName: FunName, Tag: ImplTag);
4376 InsertText(Loc: FunLocStart, Str: HF);
4377 }
4378 std::string BD = SynthesizeBlockDescriptor(DescTag, ImplTag, i, FunName,
4379 hasCopy: ImportedBlockDecls.size() > 0);
4380 InsertText(Loc: FunLocStart, Str: BD);
4381
4382 BlockDeclRefs.clear();
4383 BlockByRefDecls.clear();
4384 BlockByRefDeclsPtrSet.clear();
4385 BlockByCopyDecls.clear();
4386 BlockByCopyDeclsPtrSet.clear();
4387 ImportedBlockDecls.clear();
4388 }
4389 if (RewriteSC) {
4390 // Must insert any 'const/volatile/static here. Since it has been
4391 // removed as result of rewriting of block literals.
4392 std::string SC;
4393 if (GlobalVarDecl->getStorageClass() == SC_Static)
4394 SC = "static ";
4395 if (GlobalVarDecl->getType().isConstQualified())
4396 SC += "const ";
4397 if (GlobalVarDecl->getType().isVolatileQualified())
4398 SC += "volatile ";
4399 if (GlobalVarDecl->getType().isRestrictQualified())
4400 SC += "restrict ";
4401 InsertText(Loc: FunLocStart, Str: SC);
4402 }
4403 if (GlobalConstructionExp) {
4404 // extra fancy dance for global literal expression.
4405
4406 // Always the latest block expression on the block stack.
4407 std::string Tag = "__";
4408 Tag += FunName;
4409 Tag += "_block_impl_";
4410 Tag += utostr(X: Blocks.size()-1);
4411 std::string globalBuf = "static ";
4412 globalBuf += Tag; globalBuf += " ";
4413 std::string SStr;
4414
4415 llvm::raw_string_ostream constructorExprBuf(SStr);
4416 GlobalConstructionExp->printPretty(constructorExprBuf, nullptr,
4417 PrintingPolicy(LangOpts));
4418 globalBuf += constructorExprBuf.str();
4419 globalBuf += ";\n";
4420 InsertText(Loc: FunLocStart, Str: globalBuf);
4421 GlobalConstructionExp = nullptr;
4422 }
4423
4424 Blocks.clear();
4425 InnerDeclRefsCount.clear();
4426 InnerDeclRefs.clear();
4427 RewrittenBlockExprs.clear();
4428}
4429
4430void RewriteModernObjC::InsertBlockLiteralsWithinFunction(FunctionDecl *FD) {
4431 SourceLocation FunLocStart =
4432 (!Blocks.empty()) ? getFunctionSourceLocation(R&: *this, FD)
4433 : FD->getTypeSpecStartLoc();
4434 StringRef FuncName = FD->getName();
4435
4436 SynthesizeBlockLiterals(FunLocStart, FunName: FuncName);
4437}
4438
4439static void BuildUniqueMethodName(std::string &Name,
4440 ObjCMethodDecl *MD) {
4441 ObjCInterfaceDecl *IFace = MD->getClassInterface();
4442 Name = std::string(IFace->getName());
4443 Name += "__" + MD->getSelector().getAsString();
4444 // Convert colons to underscores.
4445 std::string::size_type loc = 0;
4446 while ((loc = Name.find(c: ':', pos: loc)) != std::string::npos)
4447 Name.replace(pos: loc, n1: 1, s: "_");
4448}
4449
4450void RewriteModernObjC::InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD) {
4451 // fprintf(stderr,"In InsertBlockLiteralsWitinMethod\n");
4452 // SourceLocation FunLocStart = MD->getBeginLoc();
4453 SourceLocation FunLocStart = MD->getBeginLoc();
4454 std::string FuncName;
4455 BuildUniqueMethodName(Name&: FuncName, MD);
4456 SynthesizeBlockLiterals(FunLocStart, FunName: FuncName);
4457}
4458
4459void RewriteModernObjC::GetBlockDeclRefExprs(Stmt *S) {
4460 for (Stmt *SubStmt : S->children())
4461 if (SubStmt) {
4462 if (BlockExpr *CBE = dyn_cast<BlockExpr>(Val: SubStmt))
4463 GetBlockDeclRefExprs(S: CBE->getBody());
4464 else
4465 GetBlockDeclRefExprs(S: SubStmt);
4466 }
4467 // Handle specific things.
4468 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Val: S))
4469 if (DRE->refersToEnclosingVariableOrCapture() ||
4470 HasLocalVariableExternalStorage(VD: DRE->getDecl()))
4471 // FIXME: Handle enums.
4472 BlockDeclRefs.push_back(Elt: DRE);
4473}
4474
4475void RewriteModernObjC::GetInnerBlockDeclRefExprs(Stmt *S,
4476 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
4477 llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts) {
4478 for (Stmt *SubStmt : S->children())
4479 if (SubStmt) {
4480 if (BlockExpr *CBE = dyn_cast<BlockExpr>(Val: SubStmt)) {
4481 InnerContexts.insert(Ptr: cast<DeclContext>(Val: CBE->getBlockDecl()));
4482 GetInnerBlockDeclRefExprs(S: CBE->getBody(),
4483 InnerBlockDeclRefs,
4484 InnerContexts);
4485 }
4486 else
4487 GetInnerBlockDeclRefExprs(S: SubStmt, InnerBlockDeclRefs, InnerContexts);
4488 }
4489 // Handle specific things.
4490 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Val: S)) {
4491 if (DRE->refersToEnclosingVariableOrCapture() ||
4492 HasLocalVariableExternalStorage(VD: DRE->getDecl())) {
4493 if (!InnerContexts.count(Ptr: DRE->getDecl()->getDeclContext()))
4494 InnerBlockDeclRefs.push_back(Elt: DRE);
4495 if (VarDecl *Var = cast<VarDecl>(Val: DRE->getDecl()))
4496 if (Var->isFunctionOrMethodVarDecl())
4497 ImportedLocalExternalDecls.insert(Ptr: Var);
4498 }
4499 }
4500}
4501
4502/// convertObjCTypeToCStyleType - This routine converts such objc types
4503/// as qualified objects, and blocks to their closest c/c++ types that
4504/// it can. It returns true if input type was modified.
4505bool RewriteModernObjC::convertObjCTypeToCStyleType(QualType &T) {
4506 QualType oldT = T;
4507 convertBlockPointerToFunctionPointer(T);
4508 if (T->isFunctionPointerType()) {
4509 QualType PointeeTy;
4510 if (const PointerType* PT = T->getAs<PointerType>()) {
4511 PointeeTy = PT->getPointeeType();
4512 if (const FunctionType *FT = PointeeTy->getAs<FunctionType>()) {
4513 T = convertFunctionTypeOfBlocks(FT);
4514 T = Context->getPointerType(T);
4515 }
4516 }
4517 }
4518
4519 convertToUnqualifiedObjCType(T);
4520 return T != oldT;
4521}
4522
4523/// convertFunctionTypeOfBlocks - This routine converts a function type
4524/// whose result type may be a block pointer or whose argument type(s)
4525/// might be block pointers to an equivalent function type replacing
4526/// all block pointers to function pointers.
4527QualType RewriteModernObjC::convertFunctionTypeOfBlocks(const FunctionType *FT) {
4528 const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(Val: FT);
4529 // FTP will be null for closures that don't take arguments.
4530 // Generate a funky cast.
4531 SmallVector<QualType, 8> ArgTypes;
4532 QualType Res = FT->getReturnType();
4533 bool modified = convertObjCTypeToCStyleType(T&: Res);
4534
4535 if (FTP) {
4536 for (auto &I : FTP->param_types()) {
4537 QualType t = I;
4538 // Make sure we convert "t (^)(...)" to "t (*)(...)".
4539 if (convertObjCTypeToCStyleType(T&: t))
4540 modified = true;
4541 ArgTypes.push_back(Elt: t);
4542 }
4543 }
4544 QualType FuncType;
4545 if (modified)
4546 FuncType = getSimpleFunctionType(result: Res, args: ArgTypes);
4547 else FuncType = QualType(FT, 0);
4548 return FuncType;
4549}
4550
4551Stmt *RewriteModernObjC::SynthesizeBlockCall(CallExpr *Exp, const Expr *BlockExp) {
4552 // Navigate to relevant type information.
4553 const BlockPointerType *CPT = nullptr;
4554
4555 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Val: BlockExp)) {
4556 CPT = DRE->getType()->getAs<BlockPointerType>();
4557 } else if (const MemberExpr *MExpr = dyn_cast<MemberExpr>(Val: BlockExp)) {
4558 CPT = MExpr->getType()->getAs<BlockPointerType>();
4559 }
4560 else if (const ParenExpr *PRE = dyn_cast<ParenExpr>(Val: BlockExp)) {
4561 return SynthesizeBlockCall(Exp, BlockExp: PRE->getSubExpr());
4562 }
4563 else if (const ImplicitCastExpr *IEXPR = dyn_cast<ImplicitCastExpr>(Val: BlockExp))
4564 CPT = IEXPR->getType()->getAs<BlockPointerType>();
4565 else if (const ConditionalOperator *CEXPR =
4566 dyn_cast<ConditionalOperator>(Val: BlockExp)) {
4567 Expr *LHSExp = CEXPR->getLHS();
4568 Stmt *LHSStmt = SynthesizeBlockCall(Exp, BlockExp: LHSExp);
4569 Expr *RHSExp = CEXPR->getRHS();
4570 Stmt *RHSStmt = SynthesizeBlockCall(Exp, BlockExp: RHSExp);
4571 Expr *CONDExp = CEXPR->getCond();
4572 ConditionalOperator *CondExpr = new (Context) ConditionalOperator(
4573 CONDExp, SourceLocation(), cast<Expr>(Val: LHSStmt), SourceLocation(),
4574 cast<Expr>(Val: RHSStmt), Exp->getType(), VK_PRValue, OK_Ordinary);
4575 return CondExpr;
4576 } else if (const ObjCIvarRefExpr *IRE = dyn_cast<ObjCIvarRefExpr>(Val: BlockExp)) {
4577 CPT = IRE->getType()->getAs<BlockPointerType>();
4578 } else if (const PseudoObjectExpr *POE
4579 = dyn_cast<PseudoObjectExpr>(Val: BlockExp)) {
4580 CPT = POE->getType()->castAs<BlockPointerType>();
4581 } else {
4582 assert(false && "RewriteBlockClass: Bad type");
4583 }
4584 assert(CPT && "RewriteBlockClass: Bad type");
4585 const FunctionType *FT = CPT->getPointeeType()->getAs<FunctionType>();
4586 assert(FT && "RewriteBlockClass: Bad type");
4587 const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(Val: FT);
4588 // FTP will be null for closures that don't take arguments.
4589
4590 RecordDecl *RD = RecordDecl::Create(*Context, TagTypeKind::Struct, TUDecl,
4591 SourceLocation(), SourceLocation(),
4592 &Context->Idents.get(Name: "__block_impl"));
4593 QualType PtrBlock = Context->getPointerType(T: Context->getTagDeclType(RD));
4594
4595 // Generate a funky cast.
4596 SmallVector<QualType, 8> ArgTypes;
4597
4598 // Push the block argument type.
4599 ArgTypes.push_back(Elt: PtrBlock);
4600 if (FTP) {
4601 for (auto &I : FTP->param_types()) {
4602 QualType t = I;
4603 // Make sure we convert "t (^)(...)" to "t (*)(...)".
4604 if (!convertBlockPointerToFunctionPointer(T&: t))
4605 convertToUnqualifiedObjCType(T&: t);
4606 ArgTypes.push_back(Elt: t);
4607 }
4608 }
4609 // Now do the pointer to function cast.
4610 QualType PtrToFuncCastType = getSimpleFunctionType(result: Exp->getType(), args: ArgTypes);
4611
4612 PtrToFuncCastType = Context->getPointerType(T: PtrToFuncCastType);
4613
4614 CastExpr *BlkCast = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: PtrBlock,
4615 Kind: CK_BitCast,
4616 E: const_cast<Expr*>(BlockExp));
4617 // Don't forget the parens to enforce the proper binding.
4618 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
4619 BlkCast);
4620 //PE->dump();
4621
4622 FieldDecl *FD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(),
4623 IdLoc: SourceLocation(),
4624 Id: &Context->Idents.get(Name: "FuncPtr"),
4625 T: Context->VoidPtrTy, TInfo: nullptr,
4626 /*BitWidth=*/BW: nullptr, /*Mutable=*/true,
4627 InitStyle: ICIS_NoInit);
4628 MemberExpr *ME = MemberExpr::CreateImplicit(
4629 C: *Context, Base: PE, IsArrow: true, MemberDecl: FD, T: FD->getType(), VK: VK_LValue, OK: OK_Ordinary);
4630
4631 CastExpr *FunkCast = NoTypeInfoCStyleCastExpr(Context, PtrToFuncCastType,
4632 CK_BitCast, ME);
4633 PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), FunkCast);
4634
4635 SmallVector<Expr*, 8> BlkExprs;
4636 // Add the implicit argument.
4637 BlkExprs.push_back(BlkCast);
4638 // Add the user arguments.
4639 for (CallExpr::arg_iterator I = Exp->arg_begin(),
4640 E = Exp->arg_end(); I != E; ++I) {
4641 BlkExprs.push_back(*I);
4642 }
4643 CallExpr *CE =
4644 CallExpr::Create(Ctx: *Context, Fn: PE, Args: BlkExprs, Ty: Exp->getType(), VK: VK_PRValue,
4645 RParenLoc: SourceLocation(), FPFeatures: FPOptionsOverride());
4646 return CE;
4647}
4648
4649// We need to return the rewritten expression to handle cases where the
4650// DeclRefExpr is embedded in another expression being rewritten.
4651// For example:
4652//
4653// int main() {
4654// __block Foo *f;
4655// __block int i;
4656//
4657// void (^myblock)() = ^() {
4658// [f test]; // f is a DeclRefExpr embedded in a message (which is being rewritten).
4659// i = 77;
4660// };
4661//}
4662Stmt *RewriteModernObjC::RewriteBlockDeclRefExpr(DeclRefExpr *DeclRefExp) {
4663 // Rewrite the byref variable into BYREFVAR->__forwarding->BYREFVAR
4664 // for each DeclRefExp where BYREFVAR is name of the variable.
4665 ValueDecl *VD = DeclRefExp->getDecl();
4666 bool isArrow = DeclRefExp->refersToEnclosingVariableOrCapture() ||
4667 HasLocalVariableExternalStorage(VD: DeclRefExp->getDecl());
4668
4669 FieldDecl *FD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(),
4670 IdLoc: SourceLocation(),
4671 Id: &Context->Idents.get(Name: "__forwarding"),
4672 T: Context->VoidPtrTy, TInfo: nullptr,
4673 /*BitWidth=*/BW: nullptr, /*Mutable=*/true,
4674 InitStyle: ICIS_NoInit);
4675 MemberExpr *ME = MemberExpr::CreateImplicit(
4676 C: *Context, Base: DeclRefExp, IsArrow: isArrow, MemberDecl: FD, T: FD->getType(), VK: VK_LValue, OK: OK_Ordinary);
4677
4678 StringRef Name = VD->getName();
4679 FD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(), IdLoc: SourceLocation(),
4680 Id: &Context->Idents.get(Name),
4681 T: Context->VoidPtrTy, TInfo: nullptr,
4682 /*BitWidth=*/BW: nullptr, /*Mutable=*/true,
4683 InitStyle: ICIS_NoInit);
4684 ME = MemberExpr::CreateImplicit(C: *Context, Base: ME, IsArrow: true, MemberDecl: FD, T: DeclRefExp->getType(),
4685 VK: VK_LValue, OK: OK_Ordinary);
4686
4687 // Need parens to enforce precedence.
4688 ParenExpr *PE = new (Context) ParenExpr(DeclRefExp->getExprLoc(),
4689 DeclRefExp->getExprLoc(),
4690 ME);
4691 ReplaceStmt(DeclRefExp, PE);
4692 return PE;
4693}
4694
4695// Rewrites the imported local variable V with external storage
4696// (static, extern, etc.) as *V
4697//
4698Stmt *RewriteModernObjC::RewriteLocalVariableExternalStorage(DeclRefExpr *DRE) {
4699 ValueDecl *VD = DRE->getDecl();
4700 if (VarDecl *Var = dyn_cast<VarDecl>(Val: VD))
4701 if (!ImportedLocalExternalDecls.count(Ptr: Var))
4702 return DRE;
4703 Expr *Exp = UnaryOperator::Create(
4704 C: const_cast<ASTContext &>(*Context), input: DRE, opc: UO_Deref, type: DRE->getType(),
4705 VK: VK_LValue, OK: OK_Ordinary, l: DRE->getLocation(), CanOverflow: false, FPFeatures: FPOptionsOverride());
4706 // Need parens to enforce precedence.
4707 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
4708 Exp);
4709 ReplaceStmt(DRE, PE);
4710 return PE;
4711}
4712
4713void RewriteModernObjC::RewriteCastExpr(CStyleCastExpr *CE) {
4714 SourceLocation LocStart = CE->getLParenLoc();
4715 SourceLocation LocEnd = CE->getRParenLoc();
4716
4717 // Need to avoid trying to rewrite synthesized casts.
4718 if (LocStart.isInvalid())
4719 return;
4720 // Need to avoid trying to rewrite casts contained in macros.
4721 if (!Rewriter::isRewritable(Loc: LocStart) || !Rewriter::isRewritable(Loc: LocEnd))
4722 return;
4723
4724 const char *startBuf = SM->getCharacterData(SL: LocStart);
4725 const char *endBuf = SM->getCharacterData(SL: LocEnd);
4726 QualType QT = CE->getType();
4727 const Type* TypePtr = QT->getAs<Type>();
4728 if (isa<TypeOfExprType>(Val: TypePtr)) {
4729 const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(Val: TypePtr);
4730 QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
4731 std::string TypeAsString = "(";
4732 RewriteBlockPointerType(Str&: TypeAsString, Type: QT);
4733 TypeAsString += ")";
4734 ReplaceText(Start: LocStart, OrigLength: endBuf-startBuf+1, Str: TypeAsString);
4735 return;
4736 }
4737 // advance the location to startArgList.
4738 const char *argPtr = startBuf;
4739
4740 while (*argPtr++ && (argPtr < endBuf)) {
4741 switch (*argPtr) {
4742 case '^':
4743 // Replace the '^' with '*'.
4744 LocStart = LocStart.getLocWithOffset(Offset: argPtr-startBuf);
4745 ReplaceText(Start: LocStart, OrigLength: 1, Str: "*");
4746 break;
4747 }
4748 }
4749}
4750
4751void RewriteModernObjC::RewriteImplicitCastObjCExpr(CastExpr *IC) {
4752 CastKind CastKind = IC->getCastKind();
4753 if (CastKind != CK_BlockPointerToObjCPointerCast &&
4754 CastKind != CK_AnyPointerToBlockPointerCast)
4755 return;
4756
4757 QualType QT = IC->getType();
4758 (void)convertBlockPointerToFunctionPointer(T&: QT);
4759 std::string TypeString(QT.getAsString(Policy: Context->getPrintingPolicy()));
4760 std::string Str = "(";
4761 Str += TypeString;
4762 Str += ")";
4763 InsertText(Loc: IC->getSubExpr()->getBeginLoc(), Str);
4764}
4765
4766void RewriteModernObjC::RewriteBlockPointerFunctionArgs(FunctionDecl *FD) {
4767 SourceLocation DeclLoc = FD->getLocation();
4768 unsigned parenCount = 0;
4769
4770 // We have 1 or more arguments that have closure pointers.
4771 const char *startBuf = SM->getCharacterData(SL: DeclLoc);
4772 const char *startArgList = strchr(s: startBuf, c: '(');
4773
4774 assert((*startArgList == '(') && "Rewriter fuzzy parser confused");
4775
4776 parenCount++;
4777 // advance the location to startArgList.
4778 DeclLoc = DeclLoc.getLocWithOffset(Offset: startArgList-startBuf);
4779 assert((DeclLoc.isValid()) && "Invalid DeclLoc");
4780
4781 const char *argPtr = startArgList;
4782
4783 while (*argPtr++ && parenCount) {
4784 switch (*argPtr) {
4785 case '^':
4786 // Replace the '^' with '*'.
4787 DeclLoc = DeclLoc.getLocWithOffset(Offset: argPtr-startArgList);
4788 ReplaceText(Start: DeclLoc, OrigLength: 1, Str: "*");
4789 break;
4790 case '(':
4791 parenCount++;
4792 break;
4793 case ')':
4794 parenCount--;
4795 break;
4796 }
4797 }
4798}
4799
4800bool RewriteModernObjC::PointerTypeTakesAnyBlockArguments(QualType QT) {
4801 const FunctionProtoType *FTP;
4802 const PointerType *PT = QT->getAs<PointerType>();
4803 if (PT) {
4804 FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
4805 } else {
4806 const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
4807 assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
4808 FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
4809 }
4810 if (FTP) {
4811 for (const auto &I : FTP->param_types())
4812 if (isTopLevelBlockPointerType(T: I))
4813 return true;
4814 }
4815 return false;
4816}
4817
4818bool RewriteModernObjC::PointerTypeTakesAnyObjCQualifiedType(QualType QT) {
4819 const FunctionProtoType *FTP;
4820 const PointerType *PT = QT->getAs<PointerType>();
4821 if (PT) {
4822 FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
4823 } else {
4824 const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
4825 assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
4826 FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
4827 }
4828 if (FTP) {
4829 for (const auto &I : FTP->param_types()) {
4830 if (I->isObjCQualifiedIdType())
4831 return true;
4832 if (I->isObjCObjectPointerType() &&
4833 I->getPointeeType()->isObjCQualifiedInterfaceType())
4834 return true;
4835 }
4836
4837 }
4838 return false;
4839}
4840
4841void RewriteModernObjC::GetExtentOfArgList(const char *Name, const char *&LParen,
4842 const char *&RParen) {
4843 const char *argPtr = strchr(s: Name, c: '(');
4844 assert((*argPtr == '(') && "Rewriter fuzzy parser confused");
4845
4846 LParen = argPtr; // output the start.
4847 argPtr++; // skip past the left paren.
4848 unsigned parenCount = 1;
4849
4850 while (*argPtr && parenCount) {
4851 switch (*argPtr) {
4852 case '(': parenCount++; break;
4853 case ')': parenCount--; break;
4854 default: break;
4855 }
4856 if (parenCount) argPtr++;
4857 }
4858 assert((*argPtr == ')') && "Rewriter fuzzy parser confused");
4859 RParen = argPtr; // output the end
4860}
4861
4862void RewriteModernObjC::RewriteBlockPointerDecl(NamedDecl *ND) {
4863 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Val: ND)) {
4864 RewriteBlockPointerFunctionArgs(FD);
4865 return;
4866 }
4867 // Handle Variables and Typedefs.
4868 SourceLocation DeclLoc = ND->getLocation();
4869 QualType DeclT;
4870 if (VarDecl *VD = dyn_cast<VarDecl>(Val: ND))
4871 DeclT = VD->getType();
4872 else if (TypedefNameDecl *TDD = dyn_cast<TypedefNameDecl>(Val: ND))
4873 DeclT = TDD->getUnderlyingType();
4874 else if (FieldDecl *FD = dyn_cast<FieldDecl>(Val: ND))
4875 DeclT = FD->getType();
4876 else
4877 llvm_unreachable("RewriteBlockPointerDecl(): Decl type not yet handled");
4878
4879 const char *startBuf = SM->getCharacterData(SL: DeclLoc);
4880 const char *endBuf = startBuf;
4881 // scan backward (from the decl location) for the end of the previous decl.
4882 while (*startBuf != '^' && *startBuf != ';' && startBuf != MainFileStart)
4883 startBuf--;
4884 SourceLocation Start = DeclLoc.getLocWithOffset(Offset: startBuf-endBuf);
4885 std::string buf;
4886 unsigned OrigLength=0;
4887 // *startBuf != '^' if we are dealing with a pointer to function that
4888 // may take block argument types (which will be handled below).
4889 if (*startBuf == '^') {
4890 // Replace the '^' with '*', computing a negative offset.
4891 buf = '*';
4892 startBuf++;
4893 OrigLength++;
4894 }
4895 while (*startBuf != ')') {
4896 buf += *startBuf;
4897 startBuf++;
4898 OrigLength++;
4899 }
4900 buf += ')';
4901 OrigLength++;
4902
4903 if (PointerTypeTakesAnyBlockArguments(QT: DeclT) ||
4904 PointerTypeTakesAnyObjCQualifiedType(QT: DeclT)) {
4905 // Replace the '^' with '*' for arguments.
4906 // Replace id<P> with id/*<>*/
4907 DeclLoc = ND->getLocation();
4908 startBuf = SM->getCharacterData(SL: DeclLoc);
4909 const char *argListBegin, *argListEnd;
4910 GetExtentOfArgList(Name: startBuf, LParen&: argListBegin, RParen&: argListEnd);
4911 while (argListBegin < argListEnd) {
4912 if (*argListBegin == '^')
4913 buf += '*';
4914 else if (*argListBegin == '<') {
4915 buf += "/*";
4916 buf += *argListBegin++;
4917 OrigLength++;
4918 while (*argListBegin != '>') {
4919 buf += *argListBegin++;
4920 OrigLength++;
4921 }
4922 buf += *argListBegin;
4923 buf += "*/";
4924 }
4925 else
4926 buf += *argListBegin;
4927 argListBegin++;
4928 OrigLength++;
4929 }
4930 buf += ')';
4931 OrigLength++;
4932 }
4933 ReplaceText(Start, OrigLength, Str: buf);
4934}
4935
4936/// SynthesizeByrefCopyDestroyHelper - This routine synthesizes:
4937/// void __Block_byref_id_object_copy(struct Block_byref_id_object *dst,
4938/// struct Block_byref_id_object *src) {
4939/// _Block_object_assign (&_dest->object, _src->object,
4940/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4941/// [|BLOCK_FIELD_IS_WEAK]) // object
4942/// _Block_object_assign(&_dest->object, _src->object,
4943/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4944/// [|BLOCK_FIELD_IS_WEAK]) // block
4945/// }
4946/// And:
4947/// void __Block_byref_id_object_dispose(struct Block_byref_id_object *_src) {
4948/// _Block_object_dispose(_src->object,
4949/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4950/// [|BLOCK_FIELD_IS_WEAK]) // object
4951/// _Block_object_dispose(_src->object,
4952/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4953/// [|BLOCK_FIELD_IS_WEAK]) // block
4954/// }
4955
4956std::string RewriteModernObjC::SynthesizeByrefCopyDestroyHelper(VarDecl *VD,
4957 int flag) {
4958 std::string S;
4959 if (CopyDestroyCache.count(V: flag))
4960 return S;
4961 CopyDestroyCache.insert(V: flag);
4962 S = "static void __Block_byref_id_object_copy_";
4963 S += utostr(X: flag);
4964 S += "(void *dst, void *src) {\n";
4965
4966 // offset into the object pointer is computed as:
4967 // void * + void* + int + int + void* + void *
4968 unsigned IntSize =
4969 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
4970 unsigned VoidPtrSize =
4971 static_cast<unsigned>(Context->getTypeSize(Context->VoidPtrTy));
4972
4973 unsigned offset = (VoidPtrSize*4 + IntSize + IntSize)/Context->getCharWidth();
4974 S += " _Block_object_assign((char*)dst + ";
4975 S += utostr(X: offset);
4976 S += ", *(void * *) ((char*)src + ";
4977 S += utostr(X: offset);
4978 S += "), ";
4979 S += utostr(X: flag);
4980 S += ");\n}\n";
4981
4982 S += "static void __Block_byref_id_object_dispose_";
4983 S += utostr(X: flag);
4984 S += "(void *src) {\n";
4985 S += " _Block_object_dispose(*(void * *) ((char*)src + ";
4986 S += utostr(X: offset);
4987 S += "), ";
4988 S += utostr(X: flag);
4989 S += ");\n}\n";
4990 return S;
4991}
4992
4993/// RewriteByRefVar - For each __block typex ND variable this routine transforms
4994/// the declaration into:
4995/// struct __Block_byref_ND {
4996/// void *__isa; // NULL for everything except __weak pointers
4997/// struct __Block_byref_ND *__forwarding;
4998/// int32_t __flags;
4999/// int32_t __size;
5000/// void *__Block_byref_id_object_copy; // If variable is __block ObjC object
5001/// void *__Block_byref_id_object_dispose; // If variable is __block ObjC object
5002/// typex ND;
5003/// };
5004///
5005/// It then replaces declaration of ND variable with:
5006/// struct __Block_byref_ND ND = {__isa=0B, __forwarding=&ND, __flags=some_flag,
5007/// __size=sizeof(struct __Block_byref_ND),
5008/// ND=initializer-if-any};
5009///
5010///
5011void RewriteModernObjC::RewriteByRefVar(VarDecl *ND, bool firstDecl,
5012 bool lastDecl) {
5013 int flag = 0;
5014 int isa = 0;
5015 SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
5016 if (DeclLoc.isInvalid())
5017 // If type location is missing, it is because of missing type (a warning).
5018 // Use variable's location which is good for this case.
5019 DeclLoc = ND->getLocation();
5020 const char *startBuf = SM->getCharacterData(SL: DeclLoc);
5021 SourceLocation X = ND->getEndLoc();
5022 X = SM->getExpansionLoc(Loc: X);
5023 const char *endBuf = SM->getCharacterData(SL: X);
5024 std::string Name(ND->getNameAsString());
5025 std::string ByrefType;
5026 RewriteByRefString(ByrefType, Name, ND, true);
5027 ByrefType += " {\n";
5028 ByrefType += " void *__isa;\n";
5029 RewriteByRefString(ByrefType, Name, ND);
5030 ByrefType += " *__forwarding;\n";
5031 ByrefType += " int __flags;\n";
5032 ByrefType += " int __size;\n";
5033 // Add void *__Block_byref_id_object_copy;
5034 // void *__Block_byref_id_object_dispose; if needed.
5035 QualType Ty = ND->getType();
5036 bool HasCopyAndDispose = Context->BlockRequiresCopying(Ty, D: ND);
5037 if (HasCopyAndDispose) {
5038 ByrefType += " void (*__Block_byref_id_object_copy)(void*, void*);\n";
5039 ByrefType += " void (*__Block_byref_id_object_dispose)(void*);\n";
5040 }
5041
5042 QualType T = Ty;
5043 (void)convertBlockPointerToFunctionPointer(T);
5044 T.getAsStringInternal(Str&: Name, Policy: Context->getPrintingPolicy());
5045
5046 ByrefType += " " + Name + ";\n";
5047 ByrefType += "};\n";
5048 // Insert this type in global scope. It is needed by helper function.
5049 SourceLocation FunLocStart;
5050 if (CurFunctionDef)
5051 FunLocStart = getFunctionSourceLocation(R&: *this, FD: CurFunctionDef);
5052 else {
5053 assert(CurMethodDef && "RewriteByRefVar - CurMethodDef is null");
5054 FunLocStart = CurMethodDef->getBeginLoc();
5055 }
5056 InsertText(Loc: FunLocStart, Str: ByrefType);
5057
5058 if (Ty.isObjCGCWeak()) {
5059 flag |= BLOCK_FIELD_IS_WEAK;
5060 isa = 1;
5061 }
5062 if (HasCopyAndDispose) {
5063 flag = BLOCK_BYREF_CALLER;
5064 QualType Ty = ND->getType();
5065 // FIXME. Handle __weak variable (BLOCK_FIELD_IS_WEAK) as well.
5066 if (Ty->isBlockPointerType())
5067 flag |= BLOCK_FIELD_IS_BLOCK;
5068 else
5069 flag |= BLOCK_FIELD_IS_OBJECT;
5070 std::string HF = SynthesizeByrefCopyDestroyHelper(VD: ND, flag);
5071 if (!HF.empty())
5072 Preamble += HF;
5073 }
5074
5075 // struct __Block_byref_ND ND =
5076 // {0, &ND, some_flag, __size=sizeof(struct __Block_byref_ND),
5077 // initializer-if-any};
5078 bool hasInit = (ND->getInit() != nullptr);
5079 // FIXME. rewriter does not support __block c++ objects which
5080 // require construction.
5081 if (hasInit)
5082 if (CXXConstructExpr *CExp = dyn_cast<CXXConstructExpr>(Val: ND->getInit())) {
5083 CXXConstructorDecl *CXXDecl = CExp->getConstructor();
5084 if (CXXDecl && CXXDecl->isDefaultConstructor())
5085 hasInit = false;
5086 }
5087
5088 unsigned flags = 0;
5089 if (HasCopyAndDispose)
5090 flags |= BLOCK_HAS_COPY_DISPOSE;
5091 Name = ND->getNameAsString();
5092 ByrefType.clear();
5093 RewriteByRefString(ByrefType, Name, ND);
5094 std::string ForwardingCastType("(");
5095 ForwardingCastType += ByrefType + " *)";
5096 ByrefType += " " + Name + " = {(void*)";
5097 ByrefType += utostr(X: isa);
5098 ByrefType += "," + ForwardingCastType + "&" + Name + ", ";
5099 ByrefType += utostr(X: flags);
5100 ByrefType += ", ";
5101 ByrefType += "sizeof(";
5102 RewriteByRefString(ByrefType, Name, ND);
5103 ByrefType += ")";
5104 if (HasCopyAndDispose) {
5105 ByrefType += ", __Block_byref_id_object_copy_";
5106 ByrefType += utostr(X: flag);
5107 ByrefType += ", __Block_byref_id_object_dispose_";
5108 ByrefType += utostr(X: flag);
5109 }
5110
5111 if (!firstDecl) {
5112 // In multiple __block declarations, and for all but 1st declaration,
5113 // find location of the separating comma. This would be start location
5114 // where new text is to be inserted.
5115 DeclLoc = ND->getLocation();
5116 const char *startDeclBuf = SM->getCharacterData(SL: DeclLoc);
5117 const char *commaBuf = startDeclBuf;
5118 while (*commaBuf != ',')
5119 commaBuf--;
5120 assert((*commaBuf == ',') && "RewriteByRefVar: can't find ','");
5121 DeclLoc = DeclLoc.getLocWithOffset(Offset: commaBuf - startDeclBuf);
5122 startBuf = commaBuf;
5123 }
5124
5125 if (!hasInit) {
5126 ByrefType += "};\n";
5127 unsigned nameSize = Name.size();
5128 // for block or function pointer declaration. Name is already
5129 // part of the declaration.
5130 if (Ty->isBlockPointerType() || Ty->isFunctionPointerType())
5131 nameSize = 1;
5132 ReplaceText(Start: DeclLoc, OrigLength: endBuf-startBuf+nameSize, Str: ByrefType);
5133 }
5134 else {
5135 ByrefType += ", ";
5136 SourceLocation startLoc;
5137 Expr *E = ND->getInit();
5138 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(Val: E))
5139 startLoc = ECE->getLParenLoc();
5140 else
5141 startLoc = E->getBeginLoc();
5142 startLoc = SM->getExpansionLoc(Loc: startLoc);
5143 endBuf = SM->getCharacterData(SL: startLoc);
5144 ReplaceText(Start: DeclLoc, OrigLength: endBuf-startBuf, Str: ByrefType);
5145
5146 const char separator = lastDecl ? ';' : ',';
5147 const char *startInitializerBuf = SM->getCharacterData(SL: startLoc);
5148 const char *separatorBuf = strchr(s: startInitializerBuf, c: separator);
5149 assert((*separatorBuf == separator) &&
5150 "RewriteByRefVar: can't find ';' or ','");
5151 SourceLocation separatorLoc =
5152 startLoc.getLocWithOffset(Offset: separatorBuf-startInitializerBuf);
5153
5154 InsertText(Loc: separatorLoc, Str: lastDecl ? "}" : "};\n");
5155 }
5156}
5157
5158void RewriteModernObjC::CollectBlockDeclRefInfo(BlockExpr *Exp) {
5159 // Add initializers for any closure decl refs.
5160 GetBlockDeclRefExprs(S: Exp->getBody());
5161 if (BlockDeclRefs.size()) {
5162 // Unique all "by copy" declarations.
5163 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5164 if (!BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
5165 if (!BlockByCopyDeclsPtrSet.count(Ptr: BlockDeclRefs[i]->getDecl())) {
5166 BlockByCopyDeclsPtrSet.insert(Ptr: BlockDeclRefs[i]->getDecl());
5167 BlockByCopyDecls.push_back(Elt: BlockDeclRefs[i]->getDecl());
5168 }
5169 }
5170 // Unique all "by ref" declarations.
5171 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5172 if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
5173 if (!BlockByRefDeclsPtrSet.count(Ptr: BlockDeclRefs[i]->getDecl())) {
5174 BlockByRefDeclsPtrSet.insert(Ptr: BlockDeclRefs[i]->getDecl());
5175 BlockByRefDecls.push_back(Elt: BlockDeclRefs[i]->getDecl());
5176 }
5177 }
5178 // Find any imported blocks...they will need special attention.
5179 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5180 if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
5181 BlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
5182 BlockDeclRefs[i]->getType()->isBlockPointerType())
5183 ImportedBlockDecls.insert(Ptr: BlockDeclRefs[i]->getDecl());
5184 }
5185}
5186
5187FunctionDecl *RewriteModernObjC::SynthBlockInitFunctionDecl(StringRef name) {
5188 IdentifierInfo *ID = &Context->Idents.get(Name: name);
5189 QualType FType = Context->getFunctionNoProtoType(Context->VoidPtrTy);
5190 return FunctionDecl::Create(*Context, TUDecl, SourceLocation(),
5191 SourceLocation(), ID, FType, nullptr, SC_Extern,
5192 false, false);
5193}
5194
5195Stmt *RewriteModernObjC::SynthBlockInitExpr(BlockExpr *Exp,
5196 const SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs) {
5197 const BlockDecl *block = Exp->getBlockDecl();
5198
5199 Blocks.push_back(Elt: Exp);
5200
5201 CollectBlockDeclRefInfo(Exp);
5202
5203 // Add inner imported variables now used in current block.
5204 int countOfInnerDecls = 0;
5205 if (!InnerBlockDeclRefs.empty()) {
5206 for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++) {
5207 DeclRefExpr *Exp = InnerBlockDeclRefs[i];
5208 ValueDecl *VD = Exp->getDecl();
5209 if (!VD->hasAttr<BlocksAttr>() && !BlockByCopyDeclsPtrSet.count(VD)) {
5210 // We need to save the copied-in variables in nested
5211 // blocks because it is needed at the end for some of the API generations.
5212 // See SynthesizeBlockLiterals routine.
5213 InnerDeclRefs.push_back(Elt: Exp); countOfInnerDecls++;
5214 BlockDeclRefs.push_back(Elt: Exp);
5215 BlockByCopyDeclsPtrSet.insert(Ptr: VD);
5216 BlockByCopyDecls.push_back(Elt: VD);
5217 }
5218 if (VD->hasAttr<BlocksAttr>() && !BlockByRefDeclsPtrSet.count(VD)) {
5219 InnerDeclRefs.push_back(Elt: Exp); countOfInnerDecls++;
5220 BlockDeclRefs.push_back(Elt: Exp);
5221 BlockByRefDeclsPtrSet.insert(Ptr: VD);
5222 BlockByRefDecls.push_back(Elt: VD);
5223 }
5224 }
5225 // Find any imported blocks...they will need special attention.
5226 for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++)
5227 if (InnerBlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
5228 InnerBlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
5229 InnerBlockDeclRefs[i]->getType()->isBlockPointerType())
5230 ImportedBlockDecls.insert(Ptr: InnerBlockDeclRefs[i]->getDecl());
5231 }
5232 InnerDeclRefsCount.push_back(Elt: countOfInnerDecls);
5233
5234 std::string FuncName;
5235
5236 if (CurFunctionDef)
5237 FuncName = CurFunctionDef->getNameAsString();
5238 else if (CurMethodDef)
5239 BuildUniqueMethodName(Name&: FuncName, MD: CurMethodDef);
5240 else if (GlobalVarDecl)
5241 FuncName = std::string(GlobalVarDecl->getNameAsString());
5242
5243 bool GlobalBlockExpr =
5244 block->getDeclContext()->getRedeclContext()->isFileContext();
5245
5246 if (GlobalBlockExpr && !GlobalVarDecl) {
5247 Diags.Report(block->getLocation(), GlobalBlockRewriteFailedDiag);
5248 GlobalBlockExpr = false;
5249 }
5250
5251 std::string BlockNumber = utostr(X: Blocks.size()-1);
5252
5253 std::string Func = "__" + FuncName + "_block_func_" + BlockNumber;
5254
5255 // Get a pointer to the function type so we can cast appropriately.
5256 QualType BFT = convertFunctionTypeOfBlocks(Exp->getFunctionType());
5257 QualType FType = Context->getPointerType(T: BFT);
5258
5259 FunctionDecl *FD;
5260 Expr *NewRep;
5261
5262 // Simulate a constructor call...
5263 std::string Tag;
5264
5265 if (GlobalBlockExpr)
5266 Tag = "__global_";
5267 else
5268 Tag = "__";
5269 Tag += FuncName + "_block_impl_" + BlockNumber;
5270
5271 FD = SynthBlockInitFunctionDecl(name: Tag);
5272 DeclRefExpr *DRE = new (Context)
5273 DeclRefExpr(*Context, FD, false, FType, VK_PRValue, SourceLocation());
5274
5275 SmallVector<Expr*, 4> InitExprs;
5276
5277 // Initialize the block function.
5278 FD = SynthBlockInitFunctionDecl(name: Func);
5279 DeclRefExpr *Arg = new (Context) DeclRefExpr(
5280 *Context, FD, false, FD->getType(), VK_LValue, SourceLocation());
5281 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: Context->VoidPtrTy,
5282 Kind: CK_BitCast, E: Arg);
5283 InitExprs.push_back(castExpr);
5284
5285 // Initialize the block descriptor.
5286 std::string DescData = "__" + FuncName + "_block_desc_" + BlockNumber + "_DATA";
5287
5288 VarDecl *NewVD = VarDecl::Create(
5289 C&: *Context, DC: TUDecl, StartLoc: SourceLocation(), IdLoc: SourceLocation(),
5290 Id: &Context->Idents.get(Name: DescData), T: Context->VoidPtrTy, TInfo: nullptr, S: SC_Static);
5291 UnaryOperator *DescRefExpr = UnaryOperator::Create(
5292 C: const_cast<ASTContext &>(*Context),
5293 input: new (Context) DeclRefExpr(*Context, NewVD, false, Context->VoidPtrTy,
5294 VK_LValue, SourceLocation()),
5295 opc: UO_AddrOf, type: Context->getPointerType(Context->VoidPtrTy), VK: VK_PRValue,
5296 OK: OK_Ordinary, l: SourceLocation(), CanOverflow: false, FPFeatures: FPOptionsOverride());
5297 InitExprs.push_back(DescRefExpr);
5298
5299 // Add initializers for any closure decl refs.
5300 if (BlockDeclRefs.size()) {
5301 Expr *Exp;
5302 // Output all "by copy" declarations.
5303 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
5304 E = BlockByCopyDecls.end(); I != E; ++I) {
5305 if (isObjCType(T: (*I)->getType())) {
5306 // FIXME: Conform to ABI ([[obj retain] autorelease]).
5307 FD = SynthBlockInitFunctionDecl(name: (*I)->getName());
5308 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5309 VK_LValue, SourceLocation());
5310 if (HasLocalVariableExternalStorage(VD: *I)) {
5311 QualType QT = (*I)->getType();
5312 QT = Context->getPointerType(T: QT);
5313 Exp = UnaryOperator::Create(C: const_cast<ASTContext &>(*Context), input: Exp,
5314 opc: UO_AddrOf, type: QT, VK: VK_PRValue, OK: OK_Ordinary,
5315 l: SourceLocation(), CanOverflow: false,
5316 FPFeatures: FPOptionsOverride());
5317 }
5318 } else if (isTopLevelBlockPointerType(T: (*I)->getType())) {
5319 FD = SynthBlockInitFunctionDecl(name: (*I)->getName());
5320 Arg = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5321 VK_LValue, SourceLocation());
5322 Exp = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: Context->VoidPtrTy,
5323 Kind: CK_BitCast, E: Arg);
5324 } else {
5325 FD = SynthBlockInitFunctionDecl(name: (*I)->getName());
5326 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5327 VK_LValue, SourceLocation());
5328 if (HasLocalVariableExternalStorage(VD: *I)) {
5329 QualType QT = (*I)->getType();
5330 QT = Context->getPointerType(T: QT);
5331 Exp = UnaryOperator::Create(C: const_cast<ASTContext &>(*Context), input: Exp,
5332 opc: UO_AddrOf, type: QT, VK: VK_PRValue, OK: OK_Ordinary,
5333 l: SourceLocation(), CanOverflow: false,
5334 FPFeatures: FPOptionsOverride());
5335 }
5336
5337 }
5338 InitExprs.push_back(Elt: Exp);
5339 }
5340 // Output all "by ref" declarations.
5341 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
5342 E = BlockByRefDecls.end(); I != E; ++I) {
5343 ValueDecl *ND = (*I);
5344 std::string Name(ND->getNameAsString());
5345 std::string RecName;
5346 RewriteByRefString(ResultStr&: RecName, Name, VD: ND, def: true);
5347 IdentifierInfo *II = &Context->Idents.get(Name: RecName.c_str()
5348 + sizeof("struct"));
5349 RecordDecl *RD =
5350 RecordDecl::Create(*Context, TagTypeKind::Struct, TUDecl,
5351 SourceLocation(), SourceLocation(), II);
5352 assert(RD && "SynthBlockInitExpr(): Can't find RecordDecl");
5353 QualType castT = Context->getPointerType(T: Context->getTagDeclType(RD));
5354
5355 FD = SynthBlockInitFunctionDecl(name: (*I)->getName());
5356 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5357 VK_LValue, SourceLocation());
5358 bool isNestedCapturedVar = false;
5359 for (const auto &CI : block->captures()) {
5360 const VarDecl *variable = CI.getVariable();
5361 if (variable == ND && CI.isNested()) {
5362 assert(CI.isByRef() &&
5363 "SynthBlockInitExpr - captured block variable is not byref");
5364 isNestedCapturedVar = true;
5365 break;
5366 }
5367 }
5368 // captured nested byref variable has its address passed. Do not take
5369 // its address again.
5370 if (!isNestedCapturedVar)
5371 Exp = UnaryOperator::Create(
5372 C: const_cast<ASTContext &>(*Context), input: Exp, opc: UO_AddrOf,
5373 type: Context->getPointerType(T: Exp->getType()), VK: VK_PRValue, OK: OK_Ordinary,
5374 l: SourceLocation(), CanOverflow: false, FPFeatures: FPOptionsOverride());
5375 Exp = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: castT, Kind: CK_BitCast, E: Exp);
5376 InitExprs.push_back(Elt: Exp);
5377 }
5378 }
5379 if (ImportedBlockDecls.size()) {
5380 // generate BLOCK_HAS_COPY_DISPOSE(have helper funcs) | BLOCK_HAS_DESCRIPTOR
5381 int flag = (BLOCK_HAS_COPY_DISPOSE | BLOCK_HAS_DESCRIPTOR);
5382 unsigned IntSize =
5383 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
5384 Expr *FlagExp = IntegerLiteral::Create(*Context, llvm::APInt(IntSize, flag),
5385 Context->IntTy, SourceLocation());
5386 InitExprs.push_back(Elt: FlagExp);
5387 }
5388 NewRep = CallExpr::Create(*Context, DRE, InitExprs, FType, VK_LValue,
5389 SourceLocation(), FPOptionsOverride());
5390
5391 if (GlobalBlockExpr) {
5392 assert (!GlobalConstructionExp &&
5393 "SynthBlockInitExpr - GlobalConstructionExp must be null");
5394 GlobalConstructionExp = NewRep;
5395 NewRep = DRE;
5396 }
5397
5398 NewRep = UnaryOperator::Create(
5399 C: const_cast<ASTContext &>(*Context), input: NewRep, opc: UO_AddrOf,
5400 type: Context->getPointerType(T: NewRep->getType()), VK: VK_PRValue, OK: OK_Ordinary,
5401 l: SourceLocation(), CanOverflow: false, FPFeatures: FPOptionsOverride());
5402 NewRep = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: FType, Kind: CK_BitCast,
5403 E: NewRep);
5404 // Put Paren around the call.
5405 NewRep = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
5406 NewRep);
5407
5408 BlockDeclRefs.clear();
5409 BlockByRefDecls.clear();
5410 BlockByRefDeclsPtrSet.clear();
5411 BlockByCopyDecls.clear();
5412 BlockByCopyDeclsPtrSet.clear();
5413 ImportedBlockDecls.clear();
5414 return NewRep;
5415}
5416
5417bool RewriteModernObjC::IsDeclStmtInForeachHeader(DeclStmt *DS) {
5418 if (const ObjCForCollectionStmt * CS =
5419 dyn_cast<ObjCForCollectionStmt>(Val: Stmts.back()))
5420 return CS->getElement() == DS;
5421 return false;
5422}
5423
5424//===----------------------------------------------------------------------===//
5425// Function Body / Expression rewriting
5426//===----------------------------------------------------------------------===//
5427
5428Stmt *RewriteModernObjC::RewriteFunctionBodyOrGlobalInitializer(Stmt *S) {
5429 if (isa<SwitchStmt>(Val: S) || isa<WhileStmt>(Val: S) ||
5430 isa<DoStmt>(Val: S) || isa<ForStmt>(Val: S))
5431 Stmts.push_back(Elt: S);
5432 else if (isa<ObjCForCollectionStmt>(Val: S)) {
5433 Stmts.push_back(Elt: S);
5434 ObjCBcLabelNo.push_back(Elt: ++BcLabelCount);
5435 }
5436
5437 // Pseudo-object operations and ivar references need special
5438 // treatment because we're going to recursively rewrite them.
5439 if (PseudoObjectExpr *PseudoOp = dyn_cast<PseudoObjectExpr>(Val: S)) {
5440 if (isa<BinaryOperator>(Val: PseudoOp->getSyntacticForm())) {
5441 return RewritePropertyOrImplicitSetter(PseudoOp);
5442 } else {
5443 return RewritePropertyOrImplicitGetter(PseudoOp);
5444 }
5445 } else if (ObjCIvarRefExpr *IvarRefExpr = dyn_cast<ObjCIvarRefExpr>(Val: S)) {
5446 return RewriteObjCIvarRefExpr(IV: IvarRefExpr);
5447 }
5448 else if (isa<OpaqueValueExpr>(Val: S))
5449 S = cast<OpaqueValueExpr>(Val: S)->getSourceExpr();
5450
5451 SourceRange OrigStmtRange = S->getSourceRange();
5452
5453 // Perform a bottom up rewrite of all children.
5454 for (Stmt *&childStmt : S->children())
5455 if (childStmt) {
5456 Stmt *newStmt = RewriteFunctionBodyOrGlobalInitializer(S: childStmt);
5457 if (newStmt) {
5458 childStmt = newStmt;
5459 }
5460 }
5461
5462 if (BlockExpr *BE = dyn_cast<BlockExpr>(Val: S)) {
5463 SmallVector<DeclRefExpr *, 8> InnerBlockDeclRefs;
5464 llvm::SmallPtrSet<const DeclContext *, 8> InnerContexts;
5465 InnerContexts.insert(BE->getBlockDecl());
5466 ImportedLocalExternalDecls.clear();
5467 GetInnerBlockDeclRefExprs(S: BE->getBody(),
5468 InnerBlockDeclRefs, InnerContexts);
5469 // Rewrite the block body in place.
5470 Stmt *SaveCurrentBody = CurrentBody;
5471 CurrentBody = BE->getBody();
5472 PropParentMap = nullptr;
5473 // block literal on rhs of a property-dot-sytax assignment
5474 // must be replaced by its synthesize ast so getRewrittenText
5475 // works as expected. In this case, what actually ends up on RHS
5476 // is the blockTranscribed which is the helper function for the
5477 // block literal; as in: self.c = ^() {[ace ARR];};
5478 bool saveDisableReplaceStmt = DisableReplaceStmt;
5479 DisableReplaceStmt = false;
5480 RewriteFunctionBodyOrGlobalInitializer(S: BE->getBody());
5481 DisableReplaceStmt = saveDisableReplaceStmt;
5482 CurrentBody = SaveCurrentBody;
5483 PropParentMap = nullptr;
5484 ImportedLocalExternalDecls.clear();
5485 // Now we snarf the rewritten text and stash it away for later use.
5486 std::string Str = Rewrite.getRewrittenText(BE->getSourceRange());
5487 RewrittenBlockExprs[BE] = Str;
5488
5489 Stmt *blockTranscribed = SynthBlockInitExpr(Exp: BE, InnerBlockDeclRefs);
5490
5491 //blockTranscribed->dump();
5492 ReplaceStmt(Old: S, New: blockTranscribed);
5493 return blockTranscribed;
5494 }
5495 // Handle specific things.
5496 if (ObjCEncodeExpr *AtEncode = dyn_cast<ObjCEncodeExpr>(Val: S))
5497 return RewriteAtEncode(Exp: AtEncode);
5498
5499 if (ObjCSelectorExpr *AtSelector = dyn_cast<ObjCSelectorExpr>(Val: S))
5500 return RewriteAtSelector(Exp: AtSelector);
5501
5502 if (ObjCStringLiteral *AtString = dyn_cast<ObjCStringLiteral>(Val: S))
5503 return RewriteObjCStringLiteral(Exp: AtString);
5504
5505 if (ObjCBoolLiteralExpr *BoolLitExpr = dyn_cast<ObjCBoolLiteralExpr>(Val: S))
5506 return RewriteObjCBoolLiteralExpr(Exp: BoolLitExpr);
5507
5508 if (ObjCBoxedExpr *BoxedExpr = dyn_cast<ObjCBoxedExpr>(Val: S))
5509 return RewriteObjCBoxedExpr(Exp: BoxedExpr);
5510
5511 if (ObjCArrayLiteral *ArrayLitExpr = dyn_cast<ObjCArrayLiteral>(Val: S))
5512 return RewriteObjCArrayLiteralExpr(Exp: ArrayLitExpr);
5513
5514 if (ObjCDictionaryLiteral *DictionaryLitExpr =
5515 dyn_cast<ObjCDictionaryLiteral>(Val: S))
5516 return RewriteObjCDictionaryLiteralExpr(Exp: DictionaryLitExpr);
5517
5518 if (ObjCMessageExpr *MessExpr = dyn_cast<ObjCMessageExpr>(Val: S)) {
5519#if 0
5520 // Before we rewrite it, put the original message expression in a comment.
5521 SourceLocation startLoc = MessExpr->getBeginLoc();
5522 SourceLocation endLoc = MessExpr->getEndLoc();
5523
5524 const char *startBuf = SM->getCharacterData(startLoc);
5525 const char *endBuf = SM->getCharacterData(endLoc);
5526
5527 std::string messString;
5528 messString += "// ";
5529 messString.append(startBuf, endBuf-startBuf+1);
5530 messString += "\n";
5531
5532 // FIXME: Missing definition of
5533 // InsertText(clang::SourceLocation, char const*, unsigned int).
5534 // InsertText(startLoc, messString);
5535 // Tried this, but it didn't work either...
5536 // ReplaceText(startLoc, 0, messString.c_str(), messString.size());
5537#endif
5538 return RewriteMessageExpr(Exp: MessExpr);
5539 }
5540
5541 if (ObjCAutoreleasePoolStmt *StmtAutoRelease =
5542 dyn_cast<ObjCAutoreleasePoolStmt>(Val: S)) {
5543 return RewriteObjCAutoreleasePoolStmt(S: StmtAutoRelease);
5544 }
5545
5546 if (ObjCAtTryStmt *StmtTry = dyn_cast<ObjCAtTryStmt>(Val: S))
5547 return RewriteObjCTryStmt(S: StmtTry);
5548
5549 if (ObjCAtSynchronizedStmt *StmtTry = dyn_cast<ObjCAtSynchronizedStmt>(Val: S))
5550 return RewriteObjCSynchronizedStmt(S: StmtTry);
5551
5552 if (ObjCAtThrowStmt *StmtThrow = dyn_cast<ObjCAtThrowStmt>(Val: S))
5553 return RewriteObjCThrowStmt(S: StmtThrow);
5554
5555 if (ObjCProtocolExpr *ProtocolExp = dyn_cast<ObjCProtocolExpr>(Val: S))
5556 return RewriteObjCProtocolExpr(Exp: ProtocolExp);
5557
5558 if (ObjCForCollectionStmt *StmtForCollection =
5559 dyn_cast<ObjCForCollectionStmt>(Val: S))
5560 return RewriteObjCForCollectionStmt(S: StmtForCollection,
5561 OrigEnd: OrigStmtRange.getEnd());
5562 if (BreakStmt *StmtBreakStmt =
5563 dyn_cast<BreakStmt>(Val: S))
5564 return RewriteBreakStmt(S: StmtBreakStmt);
5565 if (ContinueStmt *StmtContinueStmt =
5566 dyn_cast<ContinueStmt>(Val: S))
5567 return RewriteContinueStmt(S: StmtContinueStmt);
5568
5569 // Need to check for protocol refs (id <P>, Foo <P> *) in variable decls
5570 // and cast exprs.
5571 if (DeclStmt *DS = dyn_cast<DeclStmt>(Val: S)) {
5572 // FIXME: What we're doing here is modifying the type-specifier that
5573 // precedes the first Decl. In the future the DeclGroup should have
5574 // a separate type-specifier that we can rewrite.
5575 // NOTE: We need to avoid rewriting the DeclStmt if it is within
5576 // the context of an ObjCForCollectionStmt. For example:
5577 // NSArray *someArray;
5578 // for (id <FooProtocol> index in someArray) ;
5579 // This is because RewriteObjCForCollectionStmt() does textual rewriting
5580 // and it depends on the original text locations/positions.
5581 if (Stmts.empty() || !IsDeclStmtInForeachHeader(DS))
5582 RewriteObjCQualifiedInterfaceTypes(Dcl: *DS->decl_begin());
5583
5584 // Blocks rewrite rules.
5585 for (DeclStmt::decl_iterator DI = DS->decl_begin(), DE = DS->decl_end();
5586 DI != DE; ++DI) {
5587 Decl *SD = *DI;
5588 if (ValueDecl *ND = dyn_cast<ValueDecl>(Val: SD)) {
5589 if (isTopLevelBlockPointerType(T: ND->getType()))
5590 RewriteBlockPointerDecl(ND);
5591 else if (ND->getType()->isFunctionPointerType())
5592 CheckFunctionPointerDecl(ND->getType(), ND);
5593 if (VarDecl *VD = dyn_cast<VarDecl>(Val: SD)) {
5594 if (VD->hasAttr<BlocksAttr>()) {
5595 static unsigned uniqueByrefDeclCount = 0;
5596 assert(!BlockByRefDeclNo.count(ND) &&
5597 "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl");
5598 BlockByRefDeclNo[ND] = uniqueByrefDeclCount++;
5599 RewriteByRefVar(ND: VD, firstDecl: (DI == DS->decl_begin()), lastDecl: ((DI+1) == DE));
5600 }
5601 else
5602 RewriteTypeOfDecl(ND: VD);
5603 }
5604 }
5605 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(Val: SD)) {
5606 if (isTopLevelBlockPointerType(T: TD->getUnderlyingType()))
5607 RewriteBlockPointerDecl(TD);
5608 else if (TD->getUnderlyingType()->isFunctionPointerType())
5609 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
5610 }
5611 }
5612 }
5613
5614 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(Val: S))
5615 RewriteObjCQualifiedInterfaceTypes(CE);
5616
5617 if (isa<SwitchStmt>(Val: S) || isa<WhileStmt>(Val: S) ||
5618 isa<DoStmt>(Val: S) || isa<ForStmt>(Val: S)) {
5619 assert(!Stmts.empty() && "Statement stack is empty");
5620 assert ((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) ||
5621 isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back()))
5622 && "Statement stack mismatch");
5623 Stmts.pop_back();
5624 }
5625 // Handle blocks rewriting.
5626 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Val: S)) {
5627 ValueDecl *VD = DRE->getDecl();
5628 if (VD->hasAttr<BlocksAttr>())
5629 return RewriteBlockDeclRefExpr(DeclRefExp: DRE);
5630 if (HasLocalVariableExternalStorage(VD))
5631 return RewriteLocalVariableExternalStorage(DRE);
5632 }
5633
5634 if (CallExpr *CE = dyn_cast<CallExpr>(Val: S)) {
5635 if (CE->getCallee()->getType()->isBlockPointerType()) {
5636 Stmt *BlockCall = SynthesizeBlockCall(Exp: CE, BlockExp: CE->getCallee());
5637 ReplaceStmt(Old: S, New: BlockCall);
5638 return BlockCall;
5639 }
5640 }
5641 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(Val: S)) {
5642 RewriteCastExpr(CE);
5643 }
5644 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(Val: S)) {
5645 RewriteImplicitCastObjCExpr(ICE);
5646 }
5647#if 0
5648
5649 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
5650 CastExpr *Replacement = new (Context) CastExpr(ICE->getType(),
5651 ICE->getSubExpr(),
5652 SourceLocation());
5653 // Get the new text.
5654 std::string SStr;
5655 llvm::raw_string_ostream Buf(SStr);
5656 Replacement->printPretty(Buf);
5657 const std::string &Str = Buf.str();
5658
5659 printf("CAST = %s\n", &Str[0]);
5660 InsertText(ICE->getSubExpr()->getBeginLoc(), Str);
5661 delete S;
5662 return Replacement;
5663 }
5664#endif
5665 // Return this stmt unmodified.
5666 return S;
5667}
5668
5669void RewriteModernObjC::RewriteRecordBody(RecordDecl *RD) {
5670 for (auto *FD : RD->fields()) {
5671 if (isTopLevelBlockPointerType(T: FD->getType()))
5672 RewriteBlockPointerDecl(FD);
5673 if (FD->getType()->isObjCQualifiedIdType() ||
5674 FD->getType()->isObjCQualifiedInterfaceType())
5675 RewriteObjCQualifiedInterfaceTypes(FD);
5676 }
5677}
5678
5679/// HandleDeclInMainFile - This is called for each top-level decl defined in the
5680/// main file of the input.
5681void RewriteModernObjC::HandleDeclInMainFile(Decl *D) {
5682 switch (D->getKind()) {
5683 case Decl::Function: {
5684 FunctionDecl *FD = cast<FunctionDecl>(Val: D);
5685 if (FD->isOverloadedOperator())
5686 return;
5687
5688 // Since function prototypes don't have ParmDecl's, we check the function
5689 // prototype. This enables us to rewrite function declarations and
5690 // definitions using the same code.
5691 RewriteBlocksInFunctionProtoType(funcType: FD->getType(), D: FD);
5692
5693 if (!FD->isThisDeclarationADefinition())
5694 break;
5695
5696 // FIXME: If this should support Obj-C++, support CXXTryStmt
5697 if (CompoundStmt *Body = dyn_cast_or_null<CompoundStmt>(Val: FD->getBody())) {
5698 CurFunctionDef = FD;
5699 CurrentBody = Body;
5700 Body =
5701 cast_or_null<CompoundStmt>(Val: RewriteFunctionBodyOrGlobalInitializer(Body));
5702 FD->setBody(Body);
5703 CurrentBody = nullptr;
5704 if (PropParentMap) {
5705 delete PropParentMap;
5706 PropParentMap = nullptr;
5707 }
5708 // This synthesizes and inserts the block "impl" struct, invoke function,
5709 // and any copy/dispose helper functions.
5710 InsertBlockLiteralsWithinFunction(FD);
5711 RewriteLineDirective(D);
5712 CurFunctionDef = nullptr;
5713 }
5714 break;
5715 }
5716 case Decl::ObjCMethod: {
5717 ObjCMethodDecl *MD = cast<ObjCMethodDecl>(Val: D);
5718 if (CompoundStmt *Body = MD->getCompoundBody()) {
5719 CurMethodDef = MD;
5720 CurrentBody = Body;
5721 Body =
5722 cast_or_null<CompoundStmt>(Val: RewriteFunctionBodyOrGlobalInitializer(Body));
5723 MD->setBody(Body);
5724 CurrentBody = nullptr;
5725 if (PropParentMap) {
5726 delete PropParentMap;
5727 PropParentMap = nullptr;
5728 }
5729 InsertBlockLiteralsWithinMethod(MD);
5730 RewriteLineDirective(D);
5731 CurMethodDef = nullptr;
5732 }
5733 break;
5734 }
5735 case Decl::ObjCImplementation: {
5736 ObjCImplementationDecl *CI = cast<ObjCImplementationDecl>(Val: D);
5737 ClassImplementation.push_back(Elt: CI);
5738 break;
5739 }
5740 case Decl::ObjCCategoryImpl: {
5741 ObjCCategoryImplDecl *CI = cast<ObjCCategoryImplDecl>(Val: D);
5742 CategoryImplementation.push_back(Elt: CI);
5743 break;
5744 }
5745 case Decl::Var: {
5746 VarDecl *VD = cast<VarDecl>(Val: D);
5747 RewriteObjCQualifiedInterfaceTypes(VD);
5748 if (isTopLevelBlockPointerType(T: VD->getType()))
5749 RewriteBlockPointerDecl(VD);
5750 else if (VD->getType()->isFunctionPointerType()) {
5751 CheckFunctionPointerDecl(funcType: VD->getType(), ND: VD);
5752 if (VD->getInit()) {
5753 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(Val: VD->getInit())) {
5754 RewriteCastExpr(CE);
5755 }
5756 }
5757 } else if (VD->getType()->isRecordType()) {
5758 RecordDecl *RD = VD->getType()->castAs<RecordType>()->getDecl();
5759 if (RD->isCompleteDefinition())
5760 RewriteRecordBody(RD);
5761 }
5762 if (VD->getInit()) {
5763 GlobalVarDecl = VD;
5764 CurrentBody = VD->getInit();
5765 RewriteFunctionBodyOrGlobalInitializer(VD->getInit());
5766 CurrentBody = nullptr;
5767 if (PropParentMap) {
5768 delete PropParentMap;
5769 PropParentMap = nullptr;
5770 }
5771 SynthesizeBlockLiterals(FunLocStart: VD->getTypeSpecStartLoc(), FunName: VD->getName());
5772 GlobalVarDecl = nullptr;
5773
5774 // This is needed for blocks.
5775 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(Val: VD->getInit())) {
5776 RewriteCastExpr(CE);
5777 }
5778 }
5779 break;
5780 }
5781 case Decl::TypeAlias:
5782 case Decl::Typedef: {
5783 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(Val: D)) {
5784 if (isTopLevelBlockPointerType(T: TD->getUnderlyingType()))
5785 RewriteBlockPointerDecl(TD);
5786 else if (TD->getUnderlyingType()->isFunctionPointerType())
5787 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
5788 else
5789 RewriteObjCQualifiedInterfaceTypes(TD);
5790 }
5791 break;
5792 }
5793 case Decl::CXXRecord:
5794 case Decl::Record: {
5795 RecordDecl *RD = cast<RecordDecl>(Val: D);
5796 if (RD->isCompleteDefinition())
5797 RewriteRecordBody(RD);
5798 break;
5799 }
5800 default:
5801 break;
5802 }
5803 // Nothing yet.
5804}
5805
5806/// Write_ProtocolExprReferencedMetadata - This routine writer out the
5807/// protocol reference symbols in the for of:
5808/// struct _protocol_t *PROTOCOL_REF = &PROTOCOL_METADATA.
5809static void Write_ProtocolExprReferencedMetadata(ASTContext *Context,
5810 ObjCProtocolDecl *PDecl,
5811 std::string &Result) {
5812 // Also output .objc_protorefs$B section and its meta-data.
5813 if (Context->getLangOpts().MicrosoftExt)
5814 Result += "static ";
5815 Result += "struct _protocol_t *";
5816 Result += "_OBJC_PROTOCOL_REFERENCE_$_";
5817 Result += PDecl->getNameAsString();
5818 Result += " = &";
5819 Result += "_OBJC_PROTOCOL_"; Result += PDecl->getNameAsString();
5820 Result += ";\n";
5821}
5822
5823void RewriteModernObjC::HandleTranslationUnit(ASTContext &C) {
5824 if (Diags.hasErrorOccurred())
5825 return;
5826
5827 RewriteInclude();
5828
5829 for (unsigned i = 0, e = FunctionDefinitionsSeen.size(); i < e; i++) {
5830 // translation of function bodies were postponed until all class and
5831 // their extensions and implementations are seen. This is because, we
5832 // cannot build grouping structs for bitfields until they are all seen.
5833 FunctionDecl *FDecl = FunctionDefinitionsSeen[i];
5834 HandleTopLevelSingleDecl(FDecl);
5835 }
5836
5837 // Here's a great place to add any extra declarations that may be needed.
5838 // Write out meta data for each @protocol(<expr>).
5839 for (ObjCProtocolDecl *ProtDecl : ProtocolExprDecls) {
5840 RewriteObjCProtocolMetaData(Protocol: ProtDecl, Result&: Preamble);
5841 Write_ProtocolExprReferencedMetadata(Context, PDecl: ProtDecl, Result&: Preamble);
5842 }
5843
5844 InsertText(Loc: SM->getLocForStartOfFile(FID: MainFileID), Str: Preamble, InsertAfter: false);
5845
5846 if (ClassImplementation.size() || CategoryImplementation.size())
5847 RewriteImplementations();
5848
5849 for (unsigned i = 0, e = ObjCInterfacesSeen.size(); i < e; i++) {
5850 ObjCInterfaceDecl *CDecl = ObjCInterfacesSeen[i];
5851 // Write struct declaration for the class matching its ivar declarations.
5852 // Note that for modern abi, this is postponed until the end of TU
5853 // because class extensions and the implementation might declare their own
5854 // private ivars.
5855 RewriteInterfaceDecl(ClassDecl: CDecl);
5856 }
5857
5858 // Get the buffer corresponding to MainFileID. If we haven't changed it, then
5859 // we are done.
5860 if (const RewriteBuffer *RewriteBuf =
5861 Rewrite.getRewriteBufferFor(FID: MainFileID)) {
5862 //printf("Changed:\n");
5863 *OutFile << std::string(RewriteBuf->begin(), RewriteBuf->end());
5864 } else {
5865 llvm::errs() << "No changes\n";
5866 }
5867
5868 if (ClassImplementation.size() || CategoryImplementation.size() ||
5869 ProtocolExprDecls.size()) {
5870 // Rewrite Objective-c meta data*
5871 std::string ResultStr;
5872 RewriteMetaDataIntoBuffer(Result&: ResultStr);
5873 // Emit metadata.
5874 *OutFile << ResultStr;
5875 }
5876 // Emit ImageInfo;
5877 {
5878 std::string ResultStr;
5879 WriteImageInfo(Result&: ResultStr);
5880 *OutFile << ResultStr;
5881 }
5882 OutFile->flush();
5883}
5884
5885void RewriteModernObjC::Initialize(ASTContext &context) {
5886 InitializeCommon(context);
5887
5888 Preamble += "#ifndef __OBJC2__\n";
5889 Preamble += "#define __OBJC2__\n";
5890 Preamble += "#endif\n";
5891
5892 // declaring objc_selector outside the parameter list removes a silly
5893 // scope related warning...
5894 if (IsHeader)
5895 Preamble = "#pragma once\n";
5896 Preamble += "struct objc_selector; struct objc_class;\n";
5897 Preamble += "struct __rw_objc_super { \n\tstruct objc_object *object; ";
5898 Preamble += "\n\tstruct objc_object *superClass; ";
5899 // Add a constructor for creating temporary objects.
5900 Preamble += "\n\t__rw_objc_super(struct objc_object *o, struct objc_object *s) ";
5901 Preamble += ": object(o), superClass(s) {} ";
5902 Preamble += "\n};\n";
5903
5904 if (LangOpts.MicrosoftExt) {
5905 // Define all sections using syntax that makes sense.
5906 // These are currently generated.
5907 Preamble += "\n#pragma section(\".objc_classlist$B\", long, read, write)\n";
5908 Preamble += "#pragma section(\".objc_catlist$B\", long, read, write)\n";
5909 Preamble += "#pragma section(\".objc_imageinfo$B\", long, read, write)\n";
5910 Preamble += "#pragma section(\".objc_nlclslist$B\", long, read, write)\n";
5911 Preamble += "#pragma section(\".objc_nlcatlist$B\", long, read, write)\n";
5912 // These are generated but not necessary for functionality.
5913 Preamble += "#pragma section(\".cat_cls_meth$B\", long, read, write)\n";
5914 Preamble += "#pragma section(\".inst_meth$B\", long, read, write)\n";
5915 Preamble += "#pragma section(\".cls_meth$B\", long, read, write)\n";
5916 Preamble += "#pragma section(\".objc_ivar$B\", long, read, write)\n";
5917
5918 // These need be generated for performance. Currently they are not,
5919 // using API calls instead.
5920 Preamble += "#pragma section(\".objc_selrefs$B\", long, read, write)\n";
5921 Preamble += "#pragma section(\".objc_classrefs$B\", long, read, write)\n";
5922 Preamble += "#pragma section(\".objc_superrefs$B\", long, read, write)\n";
5923
5924 }
5925 Preamble += "#ifndef _REWRITER_typedef_Protocol\n";
5926 Preamble += "typedef struct objc_object Protocol;\n";
5927 Preamble += "#define _REWRITER_typedef_Protocol\n";
5928 Preamble += "#endif\n";
5929 if (LangOpts.MicrosoftExt) {
5930 Preamble += "#define __OBJC_RW_DLLIMPORT extern \"C\" __declspec(dllimport)\n";
5931 Preamble += "#define __OBJC_RW_STATICIMPORT extern \"C\"\n";
5932 }
5933 else
5934 Preamble += "#define __OBJC_RW_DLLIMPORT extern\n";
5935
5936 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend(void);\n";
5937 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSendSuper(void);\n";
5938 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend_stret(void);\n";
5939 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSendSuper_stret(void);\n";
5940 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend_fpret(void);\n";
5941
5942 Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *objc_getClass";
5943 Preamble += "(const char *);\n";
5944 Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *class_getSuperclass";
5945 Preamble += "(struct objc_class *);\n";
5946 Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *objc_getMetaClass";
5947 Preamble += "(const char *);\n";
5948 Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_throw( struct objc_object *);\n";
5949 // @synchronized hooks.
5950 Preamble += "__OBJC_RW_DLLIMPORT int objc_sync_enter( struct objc_object *);\n";
5951 Preamble += "__OBJC_RW_DLLIMPORT int objc_sync_exit( struct objc_object *);\n";
5952 Preamble += "__OBJC_RW_DLLIMPORT Protocol *objc_getProtocol(const char *);\n";
5953 Preamble += "#ifdef _WIN64\n";
5954 Preamble += "typedef unsigned long long _WIN_NSUInteger;\n";
5955 Preamble += "#else\n";
5956 Preamble += "typedef unsigned int _WIN_NSUInteger;\n";
5957 Preamble += "#endif\n";
5958 Preamble += "#ifndef __FASTENUMERATIONSTATE\n";
5959 Preamble += "struct __objcFastEnumerationState {\n\t";
5960 Preamble += "unsigned long state;\n\t";
5961 Preamble += "void **itemsPtr;\n\t";
5962 Preamble += "unsigned long *mutationsPtr;\n\t";
5963 Preamble += "unsigned long extra[5];\n};\n";
5964 Preamble += "__OBJC_RW_DLLIMPORT void objc_enumerationMutation(struct objc_object *);\n";
5965 Preamble += "#define __FASTENUMERATIONSTATE\n";
5966 Preamble += "#endif\n";
5967 Preamble += "#ifndef __NSCONSTANTSTRINGIMPL\n";
5968 Preamble += "struct __NSConstantStringImpl {\n";
5969 Preamble += " int *isa;\n";
5970 Preamble += " int flags;\n";
5971 Preamble += " char *str;\n";
5972 Preamble += "#if _WIN64\n";
5973 Preamble += " long long length;\n";
5974 Preamble += "#else\n";
5975 Preamble += " long length;\n";
5976 Preamble += "#endif\n";
5977 Preamble += "};\n";
5978 Preamble += "#ifdef CF_EXPORT_CONSTANT_STRING\n";
5979 Preamble += "extern \"C\" __declspec(dllexport) int __CFConstantStringClassReference[];\n";
5980 Preamble += "#else\n";
5981 Preamble += "__OBJC_RW_DLLIMPORT int __CFConstantStringClassReference[];\n";
5982 Preamble += "#endif\n";
5983 Preamble += "#define __NSCONSTANTSTRINGIMPL\n";
5984 Preamble += "#endif\n";
5985 // Blocks preamble.
5986 Preamble += "#ifndef BLOCK_IMPL\n";
5987 Preamble += "#define BLOCK_IMPL\n";
5988 Preamble += "struct __block_impl {\n";
5989 Preamble += " void *isa;\n";
5990 Preamble += " int Flags;\n";
5991 Preamble += " int Reserved;\n";
5992 Preamble += " void *FuncPtr;\n";
5993 Preamble += "};\n";
5994 Preamble += "// Runtime copy/destroy helper functions (from Block_private.h)\n";
5995 Preamble += "#ifdef __OBJC_EXPORT_BLOCKS\n";
5996 Preamble += "extern \"C\" __declspec(dllexport) "
5997 "void _Block_object_assign(void *, const void *, const int);\n";
5998 Preamble += "extern \"C\" __declspec(dllexport) void _Block_object_dispose(const void *, const int);\n";
5999 Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteGlobalBlock[32];\n";
6000 Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteStackBlock[32];\n";
6001 Preamble += "#else\n";
6002 Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_assign(void *, const void *, const int);\n";
6003 Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_dispose(const void *, const int);\n";
6004 Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteGlobalBlock[32];\n";
6005 Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteStackBlock[32];\n";
6006 Preamble += "#endif\n";
6007 Preamble += "#endif\n";
6008 if (LangOpts.MicrosoftExt) {
6009 Preamble += "#undef __OBJC_RW_DLLIMPORT\n";
6010 Preamble += "#undef __OBJC_RW_STATICIMPORT\n";
6011 Preamble += "#ifndef KEEP_ATTRIBUTES\n"; // We use this for clang tests.
6012 Preamble += "#define __attribute__(X)\n";
6013 Preamble += "#endif\n";
6014 Preamble += "#ifndef __weak\n";
6015 Preamble += "#define __weak\n";
6016 Preamble += "#endif\n";
6017 Preamble += "#ifndef __block\n";
6018 Preamble += "#define __block\n";
6019 Preamble += "#endif\n";
6020 }
6021 else {
6022 Preamble += "#define __block\n";
6023 Preamble += "#define __weak\n";
6024 }
6025
6026 // Declarations required for modern objective-c array and dictionary literals.
6027 Preamble += "\n#include <stdarg.h>\n";
6028 Preamble += "struct __NSContainer_literal {\n";
6029 Preamble += " void * *arr;\n";
6030 Preamble += " __NSContainer_literal (unsigned int count, ...) {\n";
6031 Preamble += "\tva_list marker;\n";
6032 Preamble += "\tva_start(marker, count);\n";
6033 Preamble += "\tarr = new void *[count];\n";
6034 Preamble += "\tfor (unsigned i = 0; i < count; i++)\n";
6035 Preamble += "\t arr[i] = va_arg(marker, void *);\n";
6036 Preamble += "\tva_end( marker );\n";
6037 Preamble += " };\n";
6038 Preamble += " ~__NSContainer_literal() {\n";
6039 Preamble += "\tdelete[] arr;\n";
6040 Preamble += " }\n";
6041 Preamble += "};\n";
6042
6043 // Declaration required for implementation of @autoreleasepool statement.
6044 Preamble += "extern \"C\" __declspec(dllimport) void * objc_autoreleasePoolPush(void);\n";
6045 Preamble += "extern \"C\" __declspec(dllimport) void objc_autoreleasePoolPop(void *);\n\n";
6046 Preamble += "struct __AtAutoreleasePool {\n";
6047 Preamble += " __AtAutoreleasePool() {atautoreleasepoolobj = objc_autoreleasePoolPush();}\n";
6048 Preamble += " ~__AtAutoreleasePool() {objc_autoreleasePoolPop(atautoreleasepoolobj);}\n";
6049 Preamble += " void * atautoreleasepoolobj;\n";
6050 Preamble += "};\n";
6051
6052 // NOTE! Windows uses LLP64 for 64bit mode. So, cast pointer to long long
6053 // as this avoids warning in any 64bit/32bit compilation model.
6054 Preamble += "\n#define __OFFSETOFIVAR__(TYPE, MEMBER) ((long long) &((TYPE *)0)->MEMBER)\n";
6055}
6056
6057/// RewriteIvarOffsetComputation - This routine synthesizes computation of
6058/// ivar offset.
6059void RewriteModernObjC::RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
6060 std::string &Result) {
6061 Result += "__OFFSETOFIVAR__(struct ";
6062 Result += ivar->getContainingInterface()->getNameAsString();
6063 if (LangOpts.MicrosoftExt)
6064 Result += "_IMPL";
6065 Result += ", ";
6066 if (ivar->isBitField())
6067 ObjCIvarBitfieldGroupDecl(IV: ivar, Result);
6068 else
6069 Result += ivar->getNameAsString();
6070 Result += ")";
6071}
6072
6073/// WriteModernMetadataDeclarations - Writes out metadata declarations for modern ABI.
6074/// struct _prop_t {
6075/// const char *name;
6076/// char *attributes;
6077/// }
6078
6079/// struct _prop_list_t {
6080/// uint32_t entsize; // sizeof(struct _prop_t)
6081/// uint32_t count_of_properties;
6082/// struct _prop_t prop_list[count_of_properties];
6083/// }
6084
6085/// struct _protocol_t;
6086
6087/// struct _protocol_list_t {
6088/// long protocol_count; // Note, this is 32/64 bit
6089/// struct _protocol_t * protocol_list[protocol_count];
6090/// }
6091
6092/// struct _objc_method {
6093/// SEL _cmd;
6094/// const char *method_type;
6095/// char *_imp;
6096/// }
6097
6098/// struct _method_list_t {
6099/// uint32_t entsize; // sizeof(struct _objc_method)
6100/// uint32_t method_count;
6101/// struct _objc_method method_list[method_count];
6102/// }
6103
6104/// struct _protocol_t {
6105/// id isa; // NULL
6106/// const char *protocol_name;
6107/// const struct _protocol_list_t * protocol_list; // super protocols
6108/// const struct method_list_t *instance_methods;
6109/// const struct method_list_t *class_methods;
6110/// const struct method_list_t *optionalInstanceMethods;
6111/// const struct method_list_t *optionalClassMethods;
6112/// const struct _prop_list_t * properties;
6113/// const uint32_t size; // sizeof(struct _protocol_t)
6114/// const uint32_t flags; // = 0
6115/// const char ** extendedMethodTypes;
6116/// }
6117
6118/// struct _ivar_t {
6119/// unsigned long int *offset; // pointer to ivar offset location
6120/// const char *name;
6121/// const char *type;
6122/// uint32_t alignment;
6123/// uint32_t size;
6124/// }
6125
6126/// struct _ivar_list_t {
6127/// uint32 entsize; // sizeof(struct _ivar_t)
6128/// uint32 count;
6129/// struct _ivar_t list[count];
6130/// }
6131
6132/// struct _class_ro_t {
6133/// uint32_t flags;
6134/// uint32_t instanceStart;
6135/// uint32_t instanceSize;
6136/// uint32_t reserved; // only when building for 64bit targets
6137/// const uint8_t *ivarLayout;
6138/// const char *name;
6139/// const struct _method_list_t *baseMethods;
6140/// const struct _protocol_list_t *baseProtocols;
6141/// const struct _ivar_list_t *ivars;
6142/// const uint8_t *weakIvarLayout;
6143/// const struct _prop_list_t *properties;
6144/// }
6145
6146/// struct _class_t {
6147/// struct _class_t *isa;
6148/// struct _class_t *superclass;
6149/// void *cache;
6150/// IMP *vtable;
6151/// struct _class_ro_t *ro;
6152/// }
6153
6154/// struct _category_t {
6155/// const char *name;
6156/// struct _class_t *cls;
6157/// const struct _method_list_t *instance_methods;
6158/// const struct _method_list_t *class_methods;
6159/// const struct _protocol_list_t *protocols;
6160/// const struct _prop_list_t *properties;
6161/// }
6162
6163/// MessageRefTy - LLVM for:
6164/// struct _message_ref_t {
6165/// IMP messenger;
6166/// SEL name;
6167/// };
6168
6169/// SuperMessageRefTy - LLVM for:
6170/// struct _super_message_ref_t {
6171/// SUPER_IMP messenger;
6172/// SEL name;
6173/// };
6174
6175static void WriteModernMetadataDeclarations(ASTContext *Context, std::string &Result) {
6176 static bool meta_data_declared = false;
6177 if (meta_data_declared)
6178 return;
6179
6180 Result += "\nstruct _prop_t {\n";
6181 Result += "\tconst char *name;\n";
6182 Result += "\tconst char *attributes;\n";
6183 Result += "};\n";
6184
6185 Result += "\nstruct _protocol_t;\n";
6186
6187 Result += "\nstruct _objc_method {\n";
6188 Result += "\tstruct objc_selector * _cmd;\n";
6189 Result += "\tconst char *method_type;\n";
6190 Result += "\tvoid *_imp;\n";
6191 Result += "};\n";
6192
6193 Result += "\nstruct _protocol_t {\n";
6194 Result += "\tvoid * isa; // NULL\n";
6195 Result += "\tconst char *protocol_name;\n";
6196 Result += "\tconst struct _protocol_list_t * protocol_list; // super protocols\n";
6197 Result += "\tconst struct method_list_t *instance_methods;\n";
6198 Result += "\tconst struct method_list_t *class_methods;\n";
6199 Result += "\tconst struct method_list_t *optionalInstanceMethods;\n";
6200 Result += "\tconst struct method_list_t *optionalClassMethods;\n";
6201 Result += "\tconst struct _prop_list_t * properties;\n";
6202 Result += "\tconst unsigned int size; // sizeof(struct _protocol_t)\n";
6203 Result += "\tconst unsigned int flags; // = 0\n";
6204 Result += "\tconst char ** extendedMethodTypes;\n";
6205 Result += "};\n";
6206
6207 Result += "\nstruct _ivar_t {\n";
6208 Result += "\tunsigned long int *offset; // pointer to ivar offset location\n";
6209 Result += "\tconst char *name;\n";
6210 Result += "\tconst char *type;\n";
6211 Result += "\tunsigned int alignment;\n";
6212 Result += "\tunsigned int size;\n";
6213 Result += "};\n";
6214
6215 Result += "\nstruct _class_ro_t {\n";
6216 Result += "\tunsigned int flags;\n";
6217 Result += "\tunsigned int instanceStart;\n";
6218 Result += "\tunsigned int instanceSize;\n";
6219 const llvm::Triple &Triple(Context->getTargetInfo().getTriple());
6220 if (Triple.getArch() == llvm::Triple::x86_64)
6221 Result += "\tunsigned int reserved;\n";
6222 Result += "\tconst unsigned char *ivarLayout;\n";
6223 Result += "\tconst char *name;\n";
6224 Result += "\tconst struct _method_list_t *baseMethods;\n";
6225 Result += "\tconst struct _objc_protocol_list *baseProtocols;\n";
6226 Result += "\tconst struct _ivar_list_t *ivars;\n";
6227 Result += "\tconst unsigned char *weakIvarLayout;\n";
6228 Result += "\tconst struct _prop_list_t *properties;\n";
6229 Result += "};\n";
6230
6231 Result += "\nstruct _class_t {\n";
6232 Result += "\tstruct _class_t *isa;\n";
6233 Result += "\tstruct _class_t *superclass;\n";
6234 Result += "\tvoid *cache;\n";
6235 Result += "\tvoid *vtable;\n";
6236 Result += "\tstruct _class_ro_t *ro;\n";
6237 Result += "};\n";
6238
6239 Result += "\nstruct _category_t {\n";
6240 Result += "\tconst char *name;\n";
6241 Result += "\tstruct _class_t *cls;\n";
6242 Result += "\tconst struct _method_list_t *instance_methods;\n";
6243 Result += "\tconst struct _method_list_t *class_methods;\n";
6244 Result += "\tconst struct _protocol_list_t *protocols;\n";
6245 Result += "\tconst struct _prop_list_t *properties;\n";
6246 Result += "};\n";
6247
6248 Result += "extern \"C\" __declspec(dllimport) struct objc_cache _objc_empty_cache;\n";
6249 Result += "#pragma warning(disable:4273)\n";
6250 meta_data_declared = true;
6251}
6252
6253static void Write_protocol_list_t_TypeDecl(std::string &Result,
6254 long super_protocol_count) {
6255 Result += "struct /*_protocol_list_t*/"; Result += " {\n";
6256 Result += "\tlong protocol_count; // Note, this is 32/64 bit\n";
6257 Result += "\tstruct _protocol_t *super_protocols[";
6258 Result += utostr(X: super_protocol_count); Result += "];\n";
6259 Result += "}";
6260}
6261
6262static void Write_method_list_t_TypeDecl(std::string &Result,
6263 unsigned int method_count) {
6264 Result += "struct /*_method_list_t*/"; Result += " {\n";
6265 Result += "\tunsigned int entsize; // sizeof(struct _objc_method)\n";
6266 Result += "\tunsigned int method_count;\n";
6267 Result += "\tstruct _objc_method method_list[";
6268 Result += utostr(X: method_count); Result += "];\n";
6269 Result += "}";
6270}
6271
6272static void Write__prop_list_t_TypeDecl(std::string &Result,
6273 unsigned int property_count) {
6274 Result += "struct /*_prop_list_t*/"; Result += " {\n";
6275 Result += "\tunsigned int entsize; // sizeof(struct _prop_t)\n";
6276 Result += "\tunsigned int count_of_properties;\n";
6277 Result += "\tstruct _prop_t prop_list[";
6278 Result += utostr(X: property_count); Result += "];\n";
6279 Result += "}";
6280}
6281
6282static void Write__ivar_list_t_TypeDecl(std::string &Result,
6283 unsigned int ivar_count) {
6284 Result += "struct /*_ivar_list_t*/"; Result += " {\n";
6285 Result += "\tunsigned int entsize; // sizeof(struct _prop_t)\n";
6286 Result += "\tunsigned int count;\n";
6287 Result += "\tstruct _ivar_t ivar_list[";
6288 Result += utostr(X: ivar_count); Result += "];\n";
6289 Result += "}";
6290}
6291
6292static void Write_protocol_list_initializer(ASTContext *Context, std::string &Result,
6293 ArrayRef<ObjCProtocolDecl *> SuperProtocols,
6294 StringRef VarName,
6295 StringRef ProtocolName) {
6296 if (SuperProtocols.size() > 0) {
6297 Result += "\nstatic ";
6298 Write_protocol_list_t_TypeDecl(Result, super_protocol_count: SuperProtocols.size());
6299 Result += " "; Result += VarName;
6300 Result += ProtocolName;
6301 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6302 Result += "\t"; Result += utostr(X: SuperProtocols.size()); Result += ",\n";
6303 for (unsigned i = 0, e = SuperProtocols.size(); i < e; i++) {
6304 ObjCProtocolDecl *SuperPD = SuperProtocols[i];
6305 Result += "\t&"; Result += "_OBJC_PROTOCOL_";
6306 Result += SuperPD->getNameAsString();
6307 if (i == e-1)
6308 Result += "\n};\n";
6309 else
6310 Result += ",\n";
6311 }
6312 }
6313}
6314
6315static void Write_method_list_t_initializer(RewriteModernObjC &RewriteObj,
6316 ASTContext *Context, std::string &Result,
6317 ArrayRef<ObjCMethodDecl *> Methods,
6318 StringRef VarName,
6319 StringRef TopLevelDeclName,
6320 bool MethodImpl) {
6321 if (Methods.size() > 0) {
6322 Result += "\nstatic ";
6323 Write_method_list_t_TypeDecl(Result, method_count: Methods.size());
6324 Result += " "; Result += VarName;
6325 Result += TopLevelDeclName;
6326 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6327 Result += "\t"; Result += "sizeof(_objc_method)"; Result += ",\n";
6328 Result += "\t"; Result += utostr(X: Methods.size()); Result += ",\n";
6329 for (unsigned i = 0, e = Methods.size(); i < e; i++) {
6330 ObjCMethodDecl *MD = Methods[i];
6331 if (i == 0)
6332 Result += "\t{{(struct objc_selector *)\"";
6333 else
6334 Result += "\t{(struct objc_selector *)\"";
6335 Result += (MD)->getSelector().getAsString(); Result += "\"";
6336 Result += ", ";
6337 std::string MethodTypeString = Context->getObjCEncodingForMethodDecl(Decl: MD);
6338 Result += "\""; Result += MethodTypeString; Result += "\"";
6339 Result += ", ";
6340 if (!MethodImpl)
6341 Result += "0";
6342 else {
6343 Result += "(void *)";
6344 Result += RewriteObj.MethodInternalNames[MD];
6345 }
6346 if (i == e-1)
6347 Result += "}}\n";
6348 else
6349 Result += "},\n";
6350 }
6351 Result += "};\n";
6352 }
6353}
6354
6355static void Write_prop_list_t_initializer(RewriteModernObjC &RewriteObj,
6356 ASTContext *Context, std::string &Result,
6357 ArrayRef<ObjCPropertyDecl *> Properties,
6358 const Decl *Container,
6359 StringRef VarName,
6360 StringRef ProtocolName) {
6361 if (Properties.size() > 0) {
6362 Result += "\nstatic ";
6363 Write__prop_list_t_TypeDecl(Result, property_count: Properties.size());
6364 Result += " "; Result += VarName;
6365 Result += ProtocolName;
6366 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6367 Result += "\t"; Result += "sizeof(_prop_t)"; Result += ",\n";
6368 Result += "\t"; Result += utostr(X: Properties.size()); Result += ",\n";
6369 for (unsigned i = 0, e = Properties.size(); i < e; i++) {
6370 ObjCPropertyDecl *PropDecl = Properties[i];
6371 if (i == 0)
6372 Result += "\t{{\"";
6373 else
6374 Result += "\t{\"";
6375 Result += PropDecl->getName(); Result += "\",";
6376 std::string PropertyTypeString =
6377 Context->getObjCEncodingForPropertyDecl(PD: PropDecl, Container);
6378 std::string QuotePropertyTypeString;
6379 RewriteObj.QuoteDoublequotes(From&: PropertyTypeString, To&: QuotePropertyTypeString);
6380 Result += "\""; Result += QuotePropertyTypeString; Result += "\"";
6381 if (i == e-1)
6382 Result += "}}\n";
6383 else
6384 Result += "},\n";
6385 }
6386 Result += "};\n";
6387 }
6388}
6389
6390// Metadata flags
6391enum MetaDataDlags {
6392 CLS = 0x0,
6393 CLS_META = 0x1,
6394 CLS_ROOT = 0x2,
6395 OBJC2_CLS_HIDDEN = 0x10,
6396 CLS_EXCEPTION = 0x20,
6397
6398 /// (Obsolete) ARC-specific: this class has a .release_ivars method
6399 CLS_HAS_IVAR_RELEASER = 0x40,
6400 /// class was compiled with -fobjc-arr
6401 CLS_COMPILED_BY_ARC = 0x80 // (1<<7)
6402};
6403
6404static void Write__class_ro_t_initializer(ASTContext *Context, std::string &Result,
6405 unsigned int flags,
6406 const std::string &InstanceStart,
6407 const std::string &InstanceSize,
6408 ArrayRef<ObjCMethodDecl *>baseMethods,
6409 ArrayRef<ObjCProtocolDecl *>baseProtocols,
6410 ArrayRef<ObjCIvarDecl *>ivars,
6411 ArrayRef<ObjCPropertyDecl *>Properties,
6412 StringRef VarName,
6413 StringRef ClassName) {
6414 Result += "\nstatic struct _class_ro_t ";
6415 Result += VarName; Result += ClassName;
6416 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6417 Result += "\t";
6418 Result += llvm::utostr(X: flags); Result += ", ";
6419 Result += InstanceStart; Result += ", ";
6420 Result += InstanceSize; Result += ", \n";
6421 Result += "\t";
6422 const llvm::Triple &Triple(Context->getTargetInfo().getTriple());
6423 if (Triple.getArch() == llvm::Triple::x86_64)
6424 // uint32_t const reserved; // only when building for 64bit targets
6425 Result += "(unsigned int)0, \n\t";
6426 // const uint8_t * const ivarLayout;
6427 Result += "0, \n\t";
6428 Result += "\""; Result += ClassName; Result += "\",\n\t";
6429 bool metaclass = ((flags & CLS_META) != 0);
6430 if (baseMethods.size() > 0) {
6431 Result += "(const struct _method_list_t *)&";
6432 if (metaclass)
6433 Result += "_OBJC_$_CLASS_METHODS_";
6434 else
6435 Result += "_OBJC_$_INSTANCE_METHODS_";
6436 Result += ClassName;
6437 Result += ",\n\t";
6438 }
6439 else
6440 Result += "0, \n\t";
6441
6442 if (!metaclass && baseProtocols.size() > 0) {
6443 Result += "(const struct _objc_protocol_list *)&";
6444 Result += "_OBJC_CLASS_PROTOCOLS_$_"; Result += ClassName;
6445 Result += ",\n\t";
6446 }
6447 else
6448 Result += "0, \n\t";
6449
6450 if (!metaclass && ivars.size() > 0) {
6451 Result += "(const struct _ivar_list_t *)&";
6452 Result += "_OBJC_$_INSTANCE_VARIABLES_"; Result += ClassName;
6453 Result += ",\n\t";
6454 }
6455 else
6456 Result += "0, \n\t";
6457
6458 // weakIvarLayout
6459 Result += "0, \n\t";
6460 if (!metaclass && Properties.size() > 0) {
6461 Result += "(const struct _prop_list_t *)&";
6462 Result += "_OBJC_$_PROP_LIST_"; Result += ClassName;
6463 Result += ",\n";
6464 }
6465 else
6466 Result += "0, \n";
6467
6468 Result += "};\n";
6469}
6470
6471static void Write_class_t(ASTContext *Context, std::string &Result,
6472 StringRef VarName,
6473 const ObjCInterfaceDecl *CDecl, bool metaclass) {
6474 bool rootClass = (!CDecl->getSuperClass());
6475 const ObjCInterfaceDecl *RootClass = CDecl;
6476
6477 if (!rootClass) {
6478 // Find the Root class
6479 RootClass = CDecl->getSuperClass();
6480 while (RootClass->getSuperClass()) {
6481 RootClass = RootClass->getSuperClass();
6482 }
6483 }
6484
6485 if (metaclass && rootClass) {
6486 // Need to handle a case of use of forward declaration.
6487 Result += "\n";
6488 Result += "extern \"C\" ";
6489 if (CDecl->getImplementation())
6490 Result += "__declspec(dllexport) ";
6491 else
6492 Result += "__declspec(dllimport) ";
6493
6494 Result += "struct _class_t OBJC_CLASS_$_";
6495 Result += CDecl->getNameAsString();
6496 Result += ";\n";
6497 }
6498 // Also, for possibility of 'super' metadata class not having been defined yet.
6499 if (!rootClass) {
6500 ObjCInterfaceDecl *SuperClass = CDecl->getSuperClass();
6501 Result += "\n";
6502 Result += "extern \"C\" ";
6503 if (SuperClass->getImplementation())
6504 Result += "__declspec(dllexport) ";
6505 else
6506 Result += "__declspec(dllimport) ";
6507
6508 Result += "struct _class_t ";
6509 Result += VarName;
6510 Result += SuperClass->getNameAsString();
6511 Result += ";\n";
6512
6513 if (metaclass && RootClass != SuperClass) {
6514 Result += "extern \"C\" ";
6515 if (RootClass->getImplementation())
6516 Result += "__declspec(dllexport) ";
6517 else
6518 Result += "__declspec(dllimport) ";
6519
6520 Result += "struct _class_t ";
6521 Result += VarName;
6522 Result += RootClass->getNameAsString();
6523 Result += ";\n";
6524 }
6525 }
6526
6527 Result += "\nextern \"C\" __declspec(dllexport) struct _class_t ";
6528 Result += VarName; Result += CDecl->getNameAsString();
6529 Result += " __attribute__ ((used, section (\"__DATA,__objc_data\"))) = {\n";
6530 Result += "\t";
6531 if (metaclass) {
6532 if (!rootClass) {
6533 Result += "0, // &"; Result += VarName;
6534 Result += RootClass->getNameAsString();
6535 Result += ",\n\t";
6536 Result += "0, // &"; Result += VarName;
6537 Result += CDecl->getSuperClass()->getNameAsString();
6538 Result += ",\n\t";
6539 }
6540 else {
6541 Result += "0, // &"; Result += VarName;
6542 Result += CDecl->getNameAsString();
6543 Result += ",\n\t";
6544 Result += "0, // &OBJC_CLASS_$_"; Result += CDecl->getNameAsString();
6545 Result += ",\n\t";
6546 }
6547 }
6548 else {
6549 Result += "0, // &OBJC_METACLASS_$_";
6550 Result += CDecl->getNameAsString();
6551 Result += ",\n\t";
6552 if (!rootClass) {
6553 Result += "0, // &"; Result += VarName;
6554 Result += CDecl->getSuperClass()->getNameAsString();
6555 Result += ",\n\t";
6556 }
6557 else
6558 Result += "0,\n\t";
6559 }
6560 Result += "0, // (void *)&_objc_empty_cache,\n\t";
6561 Result += "0, // unused, was (void *)&_objc_empty_vtable,\n\t";
6562 if (metaclass)
6563 Result += "&_OBJC_METACLASS_RO_$_";
6564 else
6565 Result += "&_OBJC_CLASS_RO_$_";
6566 Result += CDecl->getNameAsString();
6567 Result += ",\n};\n";
6568
6569 // Add static function to initialize some of the meta-data fields.
6570 // avoid doing it twice.
6571 if (metaclass)
6572 return;
6573
6574 const ObjCInterfaceDecl *SuperClass =
6575 rootClass ? CDecl : CDecl->getSuperClass();
6576
6577 Result += "static void OBJC_CLASS_SETUP_$_";
6578 Result += CDecl->getNameAsString();
6579 Result += "(void ) {\n";
6580 Result += "\tOBJC_METACLASS_$_"; Result += CDecl->getNameAsString();
6581 Result += ".isa = "; Result += "&OBJC_METACLASS_$_";
6582 Result += RootClass->getNameAsString(); Result += ";\n";
6583
6584 Result += "\tOBJC_METACLASS_$_"; Result += CDecl->getNameAsString();
6585 Result += ".superclass = ";
6586 if (rootClass)
6587 Result += "&OBJC_CLASS_$_";
6588 else
6589 Result += "&OBJC_METACLASS_$_";
6590
6591 Result += SuperClass->getNameAsString(); Result += ";\n";
6592
6593 Result += "\tOBJC_METACLASS_$_"; Result += CDecl->getNameAsString();
6594 Result += ".cache = "; Result += "&_objc_empty_cache"; Result += ";\n";
6595
6596 Result += "\tOBJC_CLASS_$_"; Result += CDecl->getNameAsString();
6597 Result += ".isa = "; Result += "&OBJC_METACLASS_$_";
6598 Result += CDecl->getNameAsString(); Result += ";\n";
6599
6600 if (!rootClass) {
6601 Result += "\tOBJC_CLASS_$_"; Result += CDecl->getNameAsString();
6602 Result += ".superclass = "; Result += "&OBJC_CLASS_$_";
6603 Result += SuperClass->getNameAsString(); Result += ";\n";
6604 }
6605
6606 Result += "\tOBJC_CLASS_$_"; Result += CDecl->getNameAsString();
6607 Result += ".cache = "; Result += "&_objc_empty_cache"; Result += ";\n";
6608 Result += "}\n";
6609}
6610
6611static void Write_category_t(RewriteModernObjC &RewriteObj, ASTContext *Context,
6612 std::string &Result,
6613 ObjCCategoryDecl *CatDecl,
6614 ObjCInterfaceDecl *ClassDecl,
6615 ArrayRef<ObjCMethodDecl *> InstanceMethods,
6616 ArrayRef<ObjCMethodDecl *> ClassMethods,
6617 ArrayRef<ObjCProtocolDecl *> RefedProtocols,
6618 ArrayRef<ObjCPropertyDecl *> ClassProperties) {
6619 StringRef CatName = CatDecl->getName();
6620 StringRef ClassName = ClassDecl->getName();
6621 // must declare an extern class object in case this class is not implemented
6622 // in this TU.
6623 Result += "\n";
6624 Result += "extern \"C\" ";
6625 if (ClassDecl->getImplementation())
6626 Result += "__declspec(dllexport) ";
6627 else
6628 Result += "__declspec(dllimport) ";
6629
6630 Result += "struct _class_t ";
6631 Result += "OBJC_CLASS_$_"; Result += ClassName;
6632 Result += ";\n";
6633
6634 Result += "\nstatic struct _category_t ";
6635 Result += "_OBJC_$_CATEGORY_";
6636 Result += ClassName; Result += "_$_"; Result += CatName;
6637 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = \n";
6638 Result += "{\n";
6639 Result += "\t\""; Result += ClassName; Result += "\",\n";
6640 Result += "\t0, // &"; Result += "OBJC_CLASS_$_"; Result += ClassName;
6641 Result += ",\n";
6642 if (InstanceMethods.size() > 0) {
6643 Result += "\t(const struct _method_list_t *)&";
6644 Result += "_OBJC_$_CATEGORY_INSTANCE_METHODS_";
6645 Result += ClassName; Result += "_$_"; Result += CatName;
6646 Result += ",\n";
6647 }
6648 else
6649 Result += "\t0,\n";
6650
6651 if (ClassMethods.size() > 0) {
6652 Result += "\t(const struct _method_list_t *)&";
6653 Result += "_OBJC_$_CATEGORY_CLASS_METHODS_";
6654 Result += ClassName; Result += "_$_"; Result += CatName;
6655 Result += ",\n";
6656 }
6657 else
6658 Result += "\t0,\n";
6659
6660 if (RefedProtocols.size() > 0) {
6661 Result += "\t(const struct _protocol_list_t *)&";
6662 Result += "_OBJC_CATEGORY_PROTOCOLS_$_";
6663 Result += ClassName; Result += "_$_"; Result += CatName;
6664 Result += ",\n";
6665 }
6666 else
6667 Result += "\t0,\n";
6668
6669 if (ClassProperties.size() > 0) {
6670 Result += "\t(const struct _prop_list_t *)&"; Result += "_OBJC_$_PROP_LIST_";
6671 Result += ClassName; Result += "_$_"; Result += CatName;
6672 Result += ",\n";
6673 }
6674 else
6675 Result += "\t0,\n";
6676
6677 Result += "};\n";
6678
6679 // Add static function to initialize the class pointer in the category structure.
6680 Result += "static void OBJC_CATEGORY_SETUP_$_";
6681 Result += ClassDecl->getNameAsString();
6682 Result += "_$_";
6683 Result += CatName;
6684 Result += "(void ) {\n";
6685 Result += "\t_OBJC_$_CATEGORY_";
6686 Result += ClassDecl->getNameAsString();
6687 Result += "_$_";
6688 Result += CatName;
6689 Result += ".cls = "; Result += "&OBJC_CLASS_$_"; Result += ClassName;
6690 Result += ";\n}\n";
6691}
6692
6693static void Write__extendedMethodTypes_initializer(RewriteModernObjC &RewriteObj,
6694 ASTContext *Context, std::string &Result,
6695 ArrayRef<ObjCMethodDecl *> Methods,
6696 StringRef VarName,
6697 StringRef ProtocolName) {
6698 if (Methods.size() == 0)
6699 return;
6700
6701 Result += "\nstatic const char *";
6702 Result += VarName; Result += ProtocolName;
6703 Result += " [] __attribute__ ((used, section (\"__DATA,__objc_const\"))) = \n";
6704 Result += "{\n";
6705 for (unsigned i = 0, e = Methods.size(); i < e; i++) {
6706 ObjCMethodDecl *MD = Methods[i];
6707 std::string MethodTypeString =
6708 Context->getObjCEncodingForMethodDecl(Decl: MD, Extended: true);
6709 std::string QuoteMethodTypeString;
6710 RewriteObj.QuoteDoublequotes(From&: MethodTypeString, To&: QuoteMethodTypeString);
6711 Result += "\t\""; Result += QuoteMethodTypeString; Result += "\"";
6712 if (i == e-1)
6713 Result += "\n};\n";
6714 else {
6715 Result += ",\n";
6716 }
6717 }
6718}
6719
6720static void Write_IvarOffsetVar(RewriteModernObjC &RewriteObj,
6721 ASTContext *Context,
6722 std::string &Result,
6723 ArrayRef<ObjCIvarDecl *> Ivars,
6724 ObjCInterfaceDecl *CDecl) {
6725 // FIXME. visibility of offset symbols may have to be set; for Darwin
6726 // this is what happens:
6727 /**
6728 if (Ivar->getAccessControl() == ObjCIvarDecl::Private ||
6729 Ivar->getAccessControl() == ObjCIvarDecl::Package ||
6730 Class->getVisibility() == HiddenVisibility)
6731 Visibility should be: HiddenVisibility;
6732 else
6733 Visibility should be: DefaultVisibility;
6734 */
6735
6736 Result += "\n";
6737 for (unsigned i =0, e = Ivars.size(); i < e; i++) {
6738 ObjCIvarDecl *IvarDecl = Ivars[i];
6739 if (Context->getLangOpts().MicrosoftExt)
6740 Result += "__declspec(allocate(\".objc_ivar$B\")) ";
6741
6742 if (!Context->getLangOpts().MicrosoftExt ||
6743 IvarDecl->getAccessControl() == ObjCIvarDecl::Private ||
6744 IvarDecl->getAccessControl() == ObjCIvarDecl::Package)
6745 Result += "extern \"C\" unsigned long int ";
6746 else
6747 Result += "extern \"C\" __declspec(dllexport) unsigned long int ";
6748 if (Ivars[i]->isBitField())
6749 RewriteObj.ObjCIvarBitfieldGroupOffset(IV: IvarDecl, Result);
6750 else
6751 WriteInternalIvarName(IDecl: CDecl, IvarDecl, Result);
6752 Result += " __attribute__ ((used, section (\"__DATA,__objc_ivar\")))";
6753 Result += " = ";
6754 RewriteObj.RewriteIvarOffsetComputation(ivar: IvarDecl, Result);
6755 Result += ";\n";
6756 if (Ivars[i]->isBitField()) {
6757 // skip over rest of the ivar bitfields.
6758 SKIP_BITFIELDS(i , e, Ivars);
6759 }
6760 }
6761}
6762
6763static void Write__ivar_list_t_initializer(RewriteModernObjC &RewriteObj,
6764 ASTContext *Context, std::string &Result,
6765 ArrayRef<ObjCIvarDecl *> OriginalIvars,
6766 StringRef VarName,
6767 ObjCInterfaceDecl *CDecl) {
6768 if (OriginalIvars.size() > 0) {
6769 Write_IvarOffsetVar(RewriteObj, Context, Result, Ivars: OriginalIvars, CDecl);
6770 SmallVector<ObjCIvarDecl *, 8> Ivars;
6771 // strip off all but the first ivar bitfield from each group of ivars.
6772 // Such ivars in the ivar list table will be replaced by their grouping struct
6773 // 'ivar'.
6774 for (unsigned i = 0, e = OriginalIvars.size(); i < e; i++) {
6775 if (OriginalIvars[i]->isBitField()) {
6776 Ivars.push_back(Elt: OriginalIvars[i]);
6777 // skip over rest of the ivar bitfields.
6778 SKIP_BITFIELDS(i , e, OriginalIvars);
6779 }
6780 else
6781 Ivars.push_back(Elt: OriginalIvars[i]);
6782 }
6783
6784 Result += "\nstatic ";
6785 Write__ivar_list_t_TypeDecl(Result, ivar_count: Ivars.size());
6786 Result += " "; Result += VarName;
6787 Result += CDecl->getNameAsString();
6788 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6789 Result += "\t"; Result += "sizeof(_ivar_t)"; Result += ",\n";
6790 Result += "\t"; Result += utostr(X: Ivars.size()); Result += ",\n";
6791 for (unsigned i =0, e = Ivars.size(); i < e; i++) {
6792 ObjCIvarDecl *IvarDecl = Ivars[i];
6793 if (i == 0)
6794 Result += "\t{{";
6795 else
6796 Result += "\t {";
6797 Result += "(unsigned long int *)&";
6798 if (Ivars[i]->isBitField())
6799 RewriteObj.ObjCIvarBitfieldGroupOffset(IV: IvarDecl, Result);
6800 else
6801 WriteInternalIvarName(IDecl: CDecl, IvarDecl, Result);
6802 Result += ", ";
6803
6804 Result += "\"";
6805 if (Ivars[i]->isBitField())
6806 RewriteObj.ObjCIvarBitfieldGroupDecl(IV: Ivars[i], Result);
6807 else
6808 Result += IvarDecl->getName();
6809 Result += "\", ";
6810
6811 QualType IVQT = IvarDecl->getType();
6812 if (IvarDecl->isBitField())
6813 IVQT = RewriteObj.GetGroupRecordTypeForObjCIvarBitfield(IV: IvarDecl);
6814
6815 std::string IvarTypeString, QuoteIvarTypeString;
6816 Context->getObjCEncodingForType(IVQT, IvarTypeString,
6817 IvarDecl);
6818 RewriteObj.QuoteDoublequotes(From&: IvarTypeString, To&: QuoteIvarTypeString);
6819 Result += "\""; Result += QuoteIvarTypeString; Result += "\", ";
6820
6821 // FIXME. this alignment represents the host alignment and need be changed to
6822 // represent the target alignment.
6823 unsigned Align = Context->getTypeAlign(T: IVQT)/8;
6824 Align = llvm::Log2_32(Value: Align);
6825 Result += llvm::utostr(X: Align); Result += ", ";
6826 CharUnits Size = Context->getTypeSizeInChars(T: IVQT);
6827 Result += llvm::utostr(X: Size.getQuantity());
6828 if (i == e-1)
6829 Result += "}}\n";
6830 else
6831 Result += "},\n";
6832 }
6833 Result += "};\n";
6834 }
6835}
6836
6837/// RewriteObjCProtocolMetaData - Rewrite protocols meta-data.
6838void RewriteModernObjC::RewriteObjCProtocolMetaData(ObjCProtocolDecl *PDecl,
6839 std::string &Result) {
6840
6841 // Do not synthesize the protocol more than once.
6842 if (ObjCSynthesizedProtocols.count(Ptr: PDecl->getCanonicalDecl()))
6843 return;
6844 WriteModernMetadataDeclarations(Context, Result);
6845
6846 if (ObjCProtocolDecl *Def = PDecl->getDefinition())
6847 PDecl = Def;
6848 // Must write out all protocol definitions in current qualifier list,
6849 // and in their nested qualifiers before writing out current definition.
6850 for (auto *I : PDecl->protocols())
6851 RewriteObjCProtocolMetaData(PDecl: I, Result);
6852
6853 // Construct method lists.
6854 std::vector<ObjCMethodDecl *> InstanceMethods, ClassMethods;
6855 std::vector<ObjCMethodDecl *> OptInstanceMethods, OptClassMethods;
6856 for (auto *MD : PDecl->instance_methods()) {
6857 if (MD->getImplementationControl() == ObjCImplementationControl::Optional) {
6858 OptInstanceMethods.push_back(MD);
6859 } else {
6860 InstanceMethods.push_back(MD);
6861 }
6862 }
6863
6864 for (auto *MD : PDecl->class_methods()) {
6865 if (MD->getImplementationControl() == ObjCImplementationControl::Optional) {
6866 OptClassMethods.push_back(MD);
6867 } else {
6868 ClassMethods.push_back(MD);
6869 }
6870 }
6871 std::vector<ObjCMethodDecl *> AllMethods;
6872 for (unsigned i = 0, e = InstanceMethods.size(); i < e; i++)
6873 AllMethods.push_back(x: InstanceMethods[i]);
6874 for (unsigned i = 0, e = ClassMethods.size(); i < e; i++)
6875 AllMethods.push_back(x: ClassMethods[i]);
6876 for (unsigned i = 0, e = OptInstanceMethods.size(); i < e; i++)
6877 AllMethods.push_back(x: OptInstanceMethods[i]);
6878 for (unsigned i = 0, e = OptClassMethods.size(); i < e; i++)
6879 AllMethods.push_back(x: OptClassMethods[i]);
6880
6881 Write__extendedMethodTypes_initializer(*this, Context, Result,
6882 AllMethods,
6883 "_OBJC_PROTOCOL_METHOD_TYPES_",
6884 PDecl->getNameAsString());
6885 // Protocol's super protocol list
6886 SmallVector<ObjCProtocolDecl *, 8> SuperProtocols(PDecl->protocols());
6887 Write_protocol_list_initializer(Context, Result, SuperProtocols,
6888 "_OBJC_PROTOCOL_REFS_",
6889 PDecl->getNameAsString());
6890
6891 Write_method_list_t_initializer(*this, Context, Result, InstanceMethods,
6892 "_OBJC_PROTOCOL_INSTANCE_METHODS_",
6893 PDecl->getNameAsString(), false);
6894
6895 Write_method_list_t_initializer(*this, Context, Result, ClassMethods,
6896 "_OBJC_PROTOCOL_CLASS_METHODS_",
6897 PDecl->getNameAsString(), false);
6898
6899 Write_method_list_t_initializer(*this, Context, Result, OptInstanceMethods,
6900 "_OBJC_PROTOCOL_OPT_INSTANCE_METHODS_",
6901 PDecl->getNameAsString(), false);
6902
6903 Write_method_list_t_initializer(*this, Context, Result, OptClassMethods,
6904 "_OBJC_PROTOCOL_OPT_CLASS_METHODS_",
6905 PDecl->getNameAsString(), false);
6906
6907 // Protocol's property metadata.
6908 SmallVector<ObjCPropertyDecl *, 8> ProtocolProperties(
6909 PDecl->instance_properties());
6910 Write_prop_list_t_initializer(*this, Context, Result, ProtocolProperties,
6911 /* Container */nullptr,
6912 "_OBJC_PROTOCOL_PROPERTIES_",
6913 PDecl->getNameAsString());
6914
6915 // Writer out root metadata for current protocol: struct _protocol_t
6916 Result += "\n";
6917 if (LangOpts.MicrosoftExt)
6918 Result += "static ";
6919 Result += "struct _protocol_t _OBJC_PROTOCOL_";
6920 Result += PDecl->getNameAsString();
6921 Result += " __attribute__ ((used)) = {\n";
6922 Result += "\t0,\n"; // id is; is null
6923 Result += "\t\""; Result += PDecl->getNameAsString(); Result += "\",\n";
6924 if (SuperProtocols.size() > 0) {
6925 Result += "\t(const struct _protocol_list_t *)&"; Result += "_OBJC_PROTOCOL_REFS_";
6926 Result += PDecl->getNameAsString(); Result += ",\n";
6927 }
6928 else
6929 Result += "\t0,\n";
6930 if (InstanceMethods.size() > 0) {
6931 Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_INSTANCE_METHODS_";
6932 Result += PDecl->getNameAsString(); Result += ",\n";
6933 }
6934 else
6935 Result += "\t0,\n";
6936
6937 if (ClassMethods.size() > 0) {
6938 Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_CLASS_METHODS_";
6939 Result += PDecl->getNameAsString(); Result += ",\n";
6940 }
6941 else
6942 Result += "\t0,\n";
6943
6944 if (OptInstanceMethods.size() > 0) {
6945 Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_OPT_INSTANCE_METHODS_";
6946 Result += PDecl->getNameAsString(); Result += ",\n";
6947 }
6948 else
6949 Result += "\t0,\n";
6950
6951 if (OptClassMethods.size() > 0) {
6952 Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_OPT_CLASS_METHODS_";
6953 Result += PDecl->getNameAsString(); Result += ",\n";
6954 }
6955 else
6956 Result += "\t0,\n";
6957
6958 if (ProtocolProperties.size() > 0) {
6959 Result += "\t(const struct _prop_list_t *)&_OBJC_PROTOCOL_PROPERTIES_";
6960 Result += PDecl->getNameAsString(); Result += ",\n";
6961 }
6962 else
6963 Result += "\t0,\n";
6964
6965 Result += "\t"; Result += "sizeof(_protocol_t)"; Result += ",\n";
6966 Result += "\t0,\n";
6967
6968 if (AllMethods.size() > 0) {
6969 Result += "\t(const char **)&"; Result += "_OBJC_PROTOCOL_METHOD_TYPES_";
6970 Result += PDecl->getNameAsString();
6971 Result += "\n};\n";
6972 }
6973 else
6974 Result += "\t0\n};\n";
6975
6976 if (LangOpts.MicrosoftExt)
6977 Result += "static ";
6978 Result += "struct _protocol_t *";
6979 Result += "_OBJC_LABEL_PROTOCOL_$_"; Result += PDecl->getNameAsString();
6980 Result += " = &_OBJC_PROTOCOL_"; Result += PDecl->getNameAsString();
6981 Result += ";\n";
6982
6983 // Mark this protocol as having been generated.
6984 if (!ObjCSynthesizedProtocols.insert(Ptr: PDecl->getCanonicalDecl()).second)
6985 llvm_unreachable("protocol already synthesized");
6986}
6987
6988/// hasObjCExceptionAttribute - Return true if this class or any super
6989/// class has the __objc_exception__ attribute.
6990/// FIXME. Move this to ASTContext.cpp as it is also used for IRGen.
6991static bool hasObjCExceptionAttribute(ASTContext &Context,
6992 const ObjCInterfaceDecl *OID) {
6993 if (OID->hasAttr<ObjCExceptionAttr>())
6994 return true;
6995 if (const ObjCInterfaceDecl *Super = OID->getSuperClass())
6996 return hasObjCExceptionAttribute(Context, OID: Super);
6997 return false;
6998}
6999
7000void RewriteModernObjC::RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
7001 std::string &Result) {
7002 ObjCInterfaceDecl *CDecl = IDecl->getClassInterface();
7003
7004 // Explicitly declared @interface's are already synthesized.
7005 if (CDecl->isImplicitInterfaceDecl())
7006 assert(false &&
7007 "Legacy implicit interface rewriting not supported in moder abi");
7008
7009 WriteModernMetadataDeclarations(Context, Result);
7010 SmallVector<ObjCIvarDecl *, 8> IVars;
7011
7012 for (ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
7013 IVD; IVD = IVD->getNextIvar()) {
7014 // Ignore unnamed bit-fields.
7015 if (!IVD->getDeclName())
7016 continue;
7017 IVars.push_back(Elt: IVD);
7018 }
7019
7020 Write__ivar_list_t_initializer(RewriteObj&: *this, Context, Result, OriginalIvars: IVars,
7021 VarName: "_OBJC_$_INSTANCE_VARIABLES_",
7022 CDecl);
7023
7024 // Build _objc_method_list for class's instance methods if needed
7025 SmallVector<ObjCMethodDecl *, 32> InstanceMethods(IDecl->instance_methods());
7026
7027 // If any of our property implementations have associated getters or
7028 // setters, produce metadata for them as well.
7029 for (const auto *Prop : IDecl->property_impls()) {
7030 if (Prop->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
7031 continue;
7032 if (!Prop->getPropertyIvarDecl())
7033 continue;
7034 ObjCPropertyDecl *PD = Prop->getPropertyDecl();
7035 if (!PD)
7036 continue;
7037 if (ObjCMethodDecl *Getter = Prop->getGetterMethodDecl())
7038 if (mustSynthesizeSetterGetterMethod(IDecl, PD, true /*getter*/))
7039 InstanceMethods.push_back(Getter);
7040 if (PD->isReadOnly())
7041 continue;
7042 if (ObjCMethodDecl *Setter = Prop->getSetterMethodDecl())
7043 if (mustSynthesizeSetterGetterMethod(IDecl, PD, false /*setter*/))
7044 InstanceMethods.push_back(Setter);
7045 }
7046
7047 Write_method_list_t_initializer(RewriteObj&: *this, Context, Result, Methods: InstanceMethods,
7048 VarName: "_OBJC_$_INSTANCE_METHODS_",
7049 TopLevelDeclName: IDecl->getNameAsString(), MethodImpl: true);
7050
7051 SmallVector<ObjCMethodDecl *, 32> ClassMethods(IDecl->class_methods());
7052
7053 Write_method_list_t_initializer(RewriteObj&: *this, Context, Result, Methods: ClassMethods,
7054 VarName: "_OBJC_$_CLASS_METHODS_",
7055 TopLevelDeclName: IDecl->getNameAsString(), MethodImpl: true);
7056
7057 // Protocols referenced in class declaration?
7058 // Protocol's super protocol list
7059 std::vector<ObjCProtocolDecl *> RefedProtocols;
7060 const ObjCList<ObjCProtocolDecl> &Protocols = CDecl->getReferencedProtocols();
7061 for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
7062 E = Protocols.end();
7063 I != E; ++I) {
7064 RefedProtocols.push_back(x: *I);
7065 // Must write out all protocol definitions in current qualifier list,
7066 // and in their nested qualifiers before writing out current definition.
7067 RewriteObjCProtocolMetaData(PDecl: *I, Result);
7068 }
7069
7070 Write_protocol_list_initializer(Context, Result,
7071 SuperProtocols: RefedProtocols,
7072 VarName: "_OBJC_CLASS_PROTOCOLS_$_",
7073 ProtocolName: IDecl->getNameAsString());
7074
7075 // Protocol's property metadata.
7076 SmallVector<ObjCPropertyDecl *, 8> ClassProperties(
7077 CDecl->instance_properties());
7078 Write_prop_list_t_initializer(*this, Context, Result, ClassProperties,
7079 /* Container */IDecl,
7080 "_OBJC_$_PROP_LIST_",
7081 CDecl->getNameAsString());
7082
7083 // Data for initializing _class_ro_t metaclass meta-data
7084 uint32_t flags = CLS_META;
7085 std::string InstanceSize;
7086 std::string InstanceStart;
7087
7088 bool classIsHidden = CDecl->getVisibility() == HiddenVisibility;
7089 if (classIsHidden)
7090 flags |= OBJC2_CLS_HIDDEN;
7091
7092 if (!CDecl->getSuperClass())
7093 // class is root
7094 flags |= CLS_ROOT;
7095 InstanceSize = "sizeof(struct _class_t)";
7096 InstanceStart = InstanceSize;
7097 Write__class_ro_t_initializer(Context, Result, flags,
7098 InstanceStart, InstanceSize,
7099 ClassMethods,
7100 nullptr,
7101 nullptr,
7102 nullptr,
7103 "_OBJC_METACLASS_RO_$_",
7104 CDecl->getNameAsString());
7105
7106 // Data for initializing _class_ro_t meta-data
7107 flags = CLS;
7108 if (classIsHidden)
7109 flags |= OBJC2_CLS_HIDDEN;
7110
7111 if (hasObjCExceptionAttribute(Context&: *Context, OID: CDecl))
7112 flags |= CLS_EXCEPTION;
7113
7114 if (!CDecl->getSuperClass())
7115 // class is root
7116 flags |= CLS_ROOT;
7117
7118 InstanceSize.clear();
7119 InstanceStart.clear();
7120 if (!ObjCSynthesizedStructs.count(Ptr: CDecl)) {
7121 InstanceSize = "0";
7122 InstanceStart = "0";
7123 }
7124 else {
7125 InstanceSize = "sizeof(struct ";
7126 InstanceSize += CDecl->getNameAsString();
7127 InstanceSize += "_IMPL)";
7128
7129 ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
7130 if (IVD) {
7131 RewriteIvarOffsetComputation(ivar: IVD, Result&: InstanceStart);
7132 }
7133 else
7134 InstanceStart = InstanceSize;
7135 }
7136 Write__class_ro_t_initializer(Context, Result, flags,
7137 InstanceStart, InstanceSize,
7138 InstanceMethods,
7139 RefedProtocols,
7140 IVars,
7141 ClassProperties,
7142 "_OBJC_CLASS_RO_$_",
7143 CDecl->getNameAsString());
7144
7145 Write_class_t(Context, Result,
7146 VarName: "OBJC_METACLASS_$_",
7147 CDecl, /*metaclass*/true);
7148
7149 Write_class_t(Context, Result,
7150 VarName: "OBJC_CLASS_$_",
7151 CDecl, /*metaclass*/false);
7152
7153 if (ImplementationIsNonLazy(IDecl))
7154 DefinedNonLazyClasses.push_back(Elt: CDecl);
7155}
7156
7157void RewriteModernObjC::RewriteClassSetupInitHook(std::string &Result) {
7158 int ClsDefCount = ClassImplementation.size();
7159 if (!ClsDefCount)
7160 return;
7161 Result += "#pragma section(\".objc_inithooks$B\", long, read, write)\n";
7162 Result += "__declspec(allocate(\".objc_inithooks$B\")) ";
7163 Result += "static void *OBJC_CLASS_SETUP[] = {\n";
7164 for (int i = 0; i < ClsDefCount; i++) {
7165 ObjCImplementationDecl *IDecl = ClassImplementation[i];
7166 ObjCInterfaceDecl *CDecl = IDecl->getClassInterface();
7167 Result += "\t(void *)&OBJC_CLASS_SETUP_$_";
7168 Result += CDecl->getName(); Result += ",\n";
7169 }
7170 Result += "};\n";
7171}
7172
7173void RewriteModernObjC::RewriteMetaDataIntoBuffer(std::string &Result) {
7174 int ClsDefCount = ClassImplementation.size();
7175 int CatDefCount = CategoryImplementation.size();
7176
7177 // For each implemented class, write out all its meta data.
7178 for (int i = 0; i < ClsDefCount; i++)
7179 RewriteObjCClassMetaData(IDecl: ClassImplementation[i], Result);
7180
7181 RewriteClassSetupInitHook(Result);
7182
7183 // For each implemented category, write out all its meta data.
7184 for (int i = 0; i < CatDefCount; i++)
7185 RewriteObjCCategoryImplDecl(CDecl: CategoryImplementation[i], Result);
7186
7187 RewriteCategorySetupInitHook(Result);
7188
7189 if (ClsDefCount > 0) {
7190 if (LangOpts.MicrosoftExt)
7191 Result += "__declspec(allocate(\".objc_classlist$B\")) ";
7192 Result += "static struct _class_t *L_OBJC_LABEL_CLASS_$ [";
7193 Result += llvm::utostr(X: ClsDefCount); Result += "]";
7194 Result +=
7195 " __attribute__((used, section (\"__DATA, __objc_classlist,"
7196 "regular,no_dead_strip\")))= {\n";
7197 for (int i = 0; i < ClsDefCount; i++) {
7198 Result += "\t&OBJC_CLASS_$_";
7199 Result += ClassImplementation[i]->getNameAsString();
7200 Result += ",\n";
7201 }
7202 Result += "};\n";
7203
7204 if (!DefinedNonLazyClasses.empty()) {
7205 if (LangOpts.MicrosoftExt)
7206 Result += "__declspec(allocate(\".objc_nlclslist$B\")) \n";
7207 Result += "static struct _class_t *_OBJC_LABEL_NONLAZY_CLASS_$[] = {\n\t";
7208 for (unsigned i = 0, e = DefinedNonLazyClasses.size(); i < e; i++) {
7209 Result += "\t&OBJC_CLASS_$_"; Result += DefinedNonLazyClasses[i]->getNameAsString();
7210 Result += ",\n";
7211 }
7212 Result += "};\n";
7213 }
7214 }
7215
7216 if (CatDefCount > 0) {
7217 if (LangOpts.MicrosoftExt)
7218 Result += "__declspec(allocate(\".objc_catlist$B\")) ";
7219 Result += "static struct _category_t *L_OBJC_LABEL_CATEGORY_$ [";
7220 Result += llvm::utostr(X: CatDefCount); Result += "]";
7221 Result +=
7222 " __attribute__((used, section (\"__DATA, __objc_catlist,"
7223 "regular,no_dead_strip\")))= {\n";
7224 for (int i = 0; i < CatDefCount; i++) {
7225 Result += "\t&_OBJC_$_CATEGORY_";
7226 Result +=
7227 CategoryImplementation[i]->getClassInterface()->getNameAsString();
7228 Result += "_$_";
7229 Result += CategoryImplementation[i]->getNameAsString();
7230 Result += ",\n";
7231 }
7232 Result += "};\n";
7233 }
7234
7235 if (!DefinedNonLazyCategories.empty()) {
7236 if (LangOpts.MicrosoftExt)
7237 Result += "__declspec(allocate(\".objc_nlcatlist$B\")) \n";
7238 Result += "static struct _category_t *_OBJC_LABEL_NONLAZY_CATEGORY_$[] = {\n\t";
7239 for (unsigned i = 0, e = DefinedNonLazyCategories.size(); i < e; i++) {
7240 Result += "\t&_OBJC_$_CATEGORY_";
7241 Result +=
7242 DefinedNonLazyCategories[i]->getClassInterface()->getNameAsString();
7243 Result += "_$_";
7244 Result += DefinedNonLazyCategories[i]->getNameAsString();
7245 Result += ",\n";
7246 }
7247 Result += "};\n";
7248 }
7249}
7250
7251void RewriteModernObjC::WriteImageInfo(std::string &Result) {
7252 if (LangOpts.MicrosoftExt)
7253 Result += "__declspec(allocate(\".objc_imageinfo$B\")) \n";
7254
7255 Result += "static struct IMAGE_INFO { unsigned version; unsigned flag; } ";
7256 // version 0, ObjCABI is 2
7257 Result += "_OBJC_IMAGE_INFO = { 0, 2 };\n";
7258}
7259
7260/// RewriteObjCCategoryImplDecl - Rewrite metadata for each category
7261/// implementation.
7262void RewriteModernObjC::RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *IDecl,
7263 std::string &Result) {
7264 WriteModernMetadataDeclarations(Context, Result);
7265 ObjCInterfaceDecl *ClassDecl = IDecl->getClassInterface();
7266 // Find category declaration for this implementation.
7267 ObjCCategoryDecl *CDecl
7268 = ClassDecl->FindCategoryDeclaration(CategoryId: IDecl->getIdentifier());
7269
7270 std::string FullCategoryName = ClassDecl->getNameAsString();
7271 FullCategoryName += "_$_";
7272 FullCategoryName += CDecl->getNameAsString();
7273
7274 // Build _objc_method_list for class's instance methods if needed
7275 SmallVector<ObjCMethodDecl *, 32> InstanceMethods(IDecl->instance_methods());
7276
7277 // If any of our property implementations have associated getters or
7278 // setters, produce metadata for them as well.
7279 for (const auto *Prop : IDecl->property_impls()) {
7280 if (Prop->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
7281 continue;
7282 if (!Prop->getPropertyIvarDecl())
7283 continue;
7284 ObjCPropertyDecl *PD = Prop->getPropertyDecl();
7285 if (!PD)
7286 continue;
7287 if (ObjCMethodDecl *Getter = Prop->getGetterMethodDecl())
7288 InstanceMethods.push_back(Getter);
7289 if (PD->isReadOnly())
7290 continue;
7291 if (ObjCMethodDecl *Setter = Prop->getSetterMethodDecl())
7292 InstanceMethods.push_back(Setter);
7293 }
7294
7295 Write_method_list_t_initializer(RewriteObj&: *this, Context, Result, Methods: InstanceMethods,
7296 VarName: "_OBJC_$_CATEGORY_INSTANCE_METHODS_",
7297 TopLevelDeclName: FullCategoryName, MethodImpl: true);
7298
7299 SmallVector<ObjCMethodDecl *, 32> ClassMethods(IDecl->class_methods());
7300
7301 Write_method_list_t_initializer(RewriteObj&: *this, Context, Result, Methods: ClassMethods,
7302 VarName: "_OBJC_$_CATEGORY_CLASS_METHODS_",
7303 TopLevelDeclName: FullCategoryName, MethodImpl: true);
7304
7305 // Protocols referenced in class declaration?
7306 // Protocol's super protocol list
7307 SmallVector<ObjCProtocolDecl *, 8> RefedProtocols(CDecl->protocols());
7308 for (auto *I : CDecl->protocols())
7309 // Must write out all protocol definitions in current qualifier list,
7310 // and in their nested qualifiers before writing out current definition.
7311 RewriteObjCProtocolMetaData(I, Result);
7312
7313 Write_protocol_list_initializer(Context, Result,
7314 SuperProtocols: RefedProtocols,
7315 VarName: "_OBJC_CATEGORY_PROTOCOLS_$_",
7316 ProtocolName: FullCategoryName);
7317
7318 // Protocol's property metadata.
7319 SmallVector<ObjCPropertyDecl *, 8> ClassProperties(
7320 CDecl->instance_properties());
7321 Write_prop_list_t_initializer(*this, Context, Result, ClassProperties,
7322 /* Container */IDecl,
7323 "_OBJC_$_PROP_LIST_",
7324 FullCategoryName);
7325
7326 Write_category_t(RewriteObj&: *this, Context, Result,
7327 CatDecl: CDecl,
7328 ClassDecl,
7329 InstanceMethods,
7330 ClassMethods,
7331 RefedProtocols,
7332 ClassProperties);
7333
7334 // Determine if this category is also "non-lazy".
7335 if (ImplementationIsNonLazy(IDecl))
7336 DefinedNonLazyCategories.push_back(Elt: CDecl);
7337}
7338
7339void RewriteModernObjC::RewriteCategorySetupInitHook(std::string &Result) {
7340 int CatDefCount = CategoryImplementation.size();
7341 if (!CatDefCount)
7342 return;
7343 Result += "#pragma section(\".objc_inithooks$B\", long, read, write)\n";
7344 Result += "__declspec(allocate(\".objc_inithooks$B\")) ";
7345 Result += "static void *OBJC_CATEGORY_SETUP[] = {\n";
7346 for (int i = 0; i < CatDefCount; i++) {
7347 ObjCCategoryImplDecl *IDecl = CategoryImplementation[i];
7348 ObjCCategoryDecl *CatDecl= IDecl->getCategoryDecl();
7349 ObjCInterfaceDecl *ClassDecl = IDecl->getClassInterface();
7350 Result += "\t(void *)&OBJC_CATEGORY_SETUP_$_";
7351 Result += ClassDecl->getName();
7352 Result += "_$_";
7353 Result += CatDecl->getName();
7354 Result += ",\n";
7355 }
7356 Result += "};\n";
7357}
7358
7359// RewriteObjCMethodsMetaData - Rewrite methods metadata for instance or
7360/// class methods.
7361template<typename MethodIterator>
7362void RewriteModernObjC::RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
7363 MethodIterator MethodEnd,
7364 bool IsInstanceMethod,
7365 StringRef prefix,
7366 StringRef ClassName,
7367 std::string &Result) {
7368 if (MethodBegin == MethodEnd) return;
7369
7370 if (!objc_impl_method) {
7371 /* struct _objc_method {
7372 SEL _cmd;
7373 char *method_types;
7374 void *_imp;
7375 }
7376 */
7377 Result += "\nstruct _objc_method {\n";
7378 Result += "\tSEL _cmd;\n";
7379 Result += "\tchar *method_types;\n";
7380 Result += "\tvoid *_imp;\n";
7381 Result += "};\n";
7382
7383 objc_impl_method = true;
7384 }
7385
7386 // Build _objc_method_list for class's methods if needed
7387
7388 /* struct {
7389 struct _objc_method_list *next_method;
7390 int method_count;
7391 struct _objc_method method_list[];
7392 }
7393 */
7394 unsigned NumMethods = std::distance(MethodBegin, MethodEnd);
7395 Result += "\n";
7396 if (LangOpts.MicrosoftExt) {
7397 if (IsInstanceMethod)
7398 Result += "__declspec(allocate(\".inst_meth$B\")) ";
7399 else
7400 Result += "__declspec(allocate(\".cls_meth$B\")) ";
7401 }
7402 Result += "static struct {\n";
7403 Result += "\tstruct _objc_method_list *next_method;\n";
7404 Result += "\tint method_count;\n";
7405 Result += "\tstruct _objc_method method_list[";
7406 Result += utostr(X: NumMethods);
7407 Result += "];\n} _OBJC_";
7408 Result += prefix;
7409 Result += IsInstanceMethod ? "INSTANCE" : "CLASS";
7410 Result += "_METHODS_";
7411 Result += ClassName;
7412 Result += " __attribute__ ((used, section (\"__OBJC, __";
7413 Result += IsInstanceMethod ? "inst" : "cls";
7414 Result += "_meth\")))= ";
7415 Result += "{\n\t0, " + utostr(X: NumMethods) + "\n";
7416
7417 Result += "\t,{{(SEL)\"";
7418 Result += (*MethodBegin)->getSelector().getAsString().c_str();
7419 std::string MethodTypeString;
7420 Context->getObjCEncodingForMethodDecl(Decl: *MethodBegin, Extended: MethodTypeString);
7421 Result += "\", \"";
7422 Result += MethodTypeString;
7423 Result += "\", (void *)";
7424 Result += MethodInternalNames[*MethodBegin];
7425 Result += "}\n";
7426 for (++MethodBegin; MethodBegin != MethodEnd; ++MethodBegin) {
7427 Result += "\t ,{(SEL)\"";
7428 Result += (*MethodBegin)->getSelector().getAsString().c_str();
7429 std::string MethodTypeString;
7430 Context->getObjCEncodingForMethodDecl(Decl: *MethodBegin, Extended: MethodTypeString);
7431 Result += "\", \"";
7432 Result += MethodTypeString;
7433 Result += "\", (void *)";
7434 Result += MethodInternalNames[*MethodBegin];
7435 Result += "}\n";
7436 }
7437 Result += "\t }\n};\n";
7438}
7439
7440Stmt *RewriteModernObjC::RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV) {
7441 SourceRange OldRange = IV->getSourceRange();
7442 Expr *BaseExpr = IV->getBase();
7443
7444 // Rewrite the base, but without actually doing replaces.
7445 {
7446 DisableReplaceStmtScope S(*this);
7447 BaseExpr = cast<Expr>(Val: RewriteFunctionBodyOrGlobalInitializer(BaseExpr));
7448 IV->setBase(BaseExpr);
7449 }
7450
7451 ObjCIvarDecl *D = IV->getDecl();
7452
7453 Expr *Replacement = IV;
7454
7455 if (BaseExpr->getType()->isObjCObjectPointerType()) {
7456 const ObjCInterfaceType *iFaceDecl =
7457 dyn_cast<ObjCInterfaceType>(Val: BaseExpr->getType()->getPointeeType());
7458 assert(iFaceDecl && "RewriteObjCIvarRefExpr - iFaceDecl is null");
7459 // lookup which class implements the instance variable.
7460 ObjCInterfaceDecl *clsDeclared = nullptr;
7461 iFaceDecl->getDecl()->lookupInstanceVariable(D->getIdentifier(),
7462 clsDeclared);
7463 assert(clsDeclared && "RewriteObjCIvarRefExpr(): Can't find class");
7464
7465 // Build name of symbol holding ivar offset.
7466 std::string IvarOffsetName;
7467 if (D->isBitField())
7468 ObjCIvarBitfieldGroupOffset(IV: D, Result&: IvarOffsetName);
7469 else
7470 WriteInternalIvarName(IDecl: clsDeclared, IvarDecl: D, Result&: IvarOffsetName);
7471
7472 ReferencedIvars[clsDeclared].insert(X: D);
7473
7474 // cast offset to "char *".
7475 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Ctx: Context,
7476 Ty: Context->getPointerType(Context->CharTy),
7477 Kind: CK_BitCast,
7478 E: BaseExpr);
7479 VarDecl *NewVD = VarDecl::Create(C&: *Context, DC: TUDecl, StartLoc: SourceLocation(),
7480 IdLoc: SourceLocation(), Id: &Context->Idents.get(Name: IvarOffsetName),
7481 T: Context->UnsignedLongTy, TInfo: nullptr,
7482 S: SC_Extern);
7483 DeclRefExpr *DRE = new (Context)
7484 DeclRefExpr(*Context, NewVD, false, Context->UnsignedLongTy,
7485 VK_LValue, SourceLocation());
7486 BinaryOperator *addExpr = BinaryOperator::Create(
7487 C: *Context, lhs: castExpr, rhs: DRE, opc: BO_Add,
7488 ResTy: Context->getPointerType(Context->CharTy), VK: VK_PRValue, OK: OK_Ordinary,
7489 opLoc: SourceLocation(), FPFeatures: FPOptionsOverride());
7490 // Don't forget the parens to enforce the proper binding.
7491 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(),
7492 SourceLocation(),
7493 addExpr);
7494 QualType IvarT = D->getType();
7495 if (D->isBitField())
7496 IvarT = GetGroupRecordTypeForObjCIvarBitfield(IV: D);
7497
7498 if (!IvarT->getAs<TypedefType>() && IvarT->isRecordType()) {
7499 RecordDecl *RD = IvarT->castAs<RecordType>()->getDecl();
7500 RD = RD->getDefinition();
7501 if (RD && !RD->getDeclName().getAsIdentifierInfo()) {
7502 // decltype(((Foo_IMPL*)0)->bar) *
7503 auto *CDecl = cast<ObjCContainerDecl>(D->getDeclContext());
7504 // ivar in class extensions requires special treatment.
7505 if (ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CDecl))
7506 CDecl = CatDecl->getClassInterface();
7507 std::string RecName = std::string(CDecl->getName());
7508 RecName += "_IMPL";
7509 RecordDecl *RD = RecordDecl::Create(
7510 *Context, TagTypeKind::Struct, TUDecl, SourceLocation(),
7511 SourceLocation(), &Context->Idents.get(Name: RecName));
7512 QualType PtrStructIMPL = Context->getPointerType(T: Context->getTagDeclType(RD));
7513 unsigned UnsignedIntSize =
7514 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
7515 Expr *Zero = IntegerLiteral::Create(*Context,
7516 llvm::APInt(UnsignedIntSize, 0),
7517 Context->UnsignedIntTy, SourceLocation());
7518 Zero = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: PtrStructIMPL, Kind: CK_BitCast, E: Zero);
7519 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
7520 Zero);
7521 FieldDecl *FD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(),
7522 IdLoc: SourceLocation(),
7523 Id: &Context->Idents.get(D->getNameAsString()),
7524 T: IvarT, TInfo: nullptr,
7525 /*BitWidth=*/BW: nullptr,
7526 /*Mutable=*/true, InitStyle: ICIS_NoInit);
7527 MemberExpr *ME = MemberExpr::CreateImplicit(
7528 C: *Context, Base: PE, IsArrow: true, MemberDecl: FD, T: FD->getType(), VK: VK_LValue, OK: OK_Ordinary);
7529 IvarT = Context->getDecltypeType(e: ME, UnderlyingType: ME->getType());
7530 }
7531 }
7532 convertObjCTypeToCStyleType(T&: IvarT);
7533 QualType castT = Context->getPointerType(T: IvarT);
7534
7535 castExpr = NoTypeInfoCStyleCastExpr(Context,
7536 castT,
7537 CK_BitCast,
7538 PE);
7539
7540 Expr *Exp = UnaryOperator::Create(
7541 const_cast<ASTContext &>(*Context), castExpr, UO_Deref, IvarT,
7542 VK_LValue, OK_Ordinary, SourceLocation(), false, FPOptionsOverride());
7543 PE = new (Context) ParenExpr(OldRange.getBegin(),
7544 OldRange.getEnd(),
7545 Exp);
7546
7547 if (D->isBitField()) {
7548 FieldDecl *FD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(),
7549 IdLoc: SourceLocation(),
7550 Id: &Context->Idents.get(D->getNameAsString()),
7551 T: D->getType(), TInfo: nullptr,
7552 /*BitWidth=*/BW: D->getBitWidth(),
7553 /*Mutable=*/true, InitStyle: ICIS_NoInit);
7554 MemberExpr *ME =
7555 MemberExpr::CreateImplicit(C: *Context, Base: PE, /*isArrow*/ IsArrow: false, MemberDecl: FD,
7556 T: FD->getType(), VK: VK_LValue, OK: OK_Ordinary);
7557 Replacement = ME;
7558
7559 }
7560 else
7561 Replacement = PE;
7562 }
7563
7564 ReplaceStmtWithRange(IV, Replacement, OldRange);
7565 return Replacement;
7566}
7567
7568#endif // CLANG_ENABLE_OBJC_REWRITER
7569

source code of clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp