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(VD: TD);
233 else if (TD->getUnderlyingType()->isFunctionPointerType())
234 CheckFunctionPointerDecl(dType: TD->getUnderlyingType(), ND: TD);
235 else
236 RewriteObjCQualifiedInterfaceTypes(Dcl: 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
277 // If replacement succeeded or warning disabled return with no warning.
278 if (!Rewrite.ReplaceText(Start: SrcRange.getBegin(), OrigLength: Size, NewStr: SStr)) {
279 ReplacedNodes[Old] = New;
280 return;
281 }
282 if (SilenceRewriteMacroWarning)
283 return;
284 Diags.Report(Loc: Context->getFullLoc(Loc: Old->getBeginLoc()), DiagID: RewriteFailedDiag)
285 << Old->getSourceRange();
286 }
287
288 void InsertText(SourceLocation Loc, StringRef Str,
289 bool InsertAfter = true) {
290 // If insertion succeeded or warning disabled return with no warning.
291 if (!Rewrite.InsertText(Loc, Str, InsertAfter) ||
292 SilenceRewriteMacroWarning)
293 return;
294
295 Diags.Report(Loc: Context->getFullLoc(Loc), DiagID: RewriteFailedDiag);
296 }
297
298 void ReplaceText(SourceLocation Start, unsigned OrigLength,
299 StringRef Str) {
300 // If removal succeeded or warning disabled return with no warning.
301 if (!Rewrite.ReplaceText(Start, OrigLength, NewStr: Str) ||
302 SilenceRewriteMacroWarning)
303 return;
304
305 Diags.Report(Loc: Context->getFullLoc(Loc: Start), DiagID: RewriteFailedDiag);
306 }
307
308 // Syntactic Rewriting.
309 void RewriteRecordBody(RecordDecl *RD);
310 void RewriteInclude();
311 void RewriteLineDirective(const Decl *D);
312 void ConvertSourceLocationToLineDirective(SourceLocation Loc,
313 std::string &LineString);
314 void RewriteForwardClassDecl(DeclGroupRef D);
315 void RewriteForwardClassDecl(const SmallVectorImpl<Decl *> &DG);
316 void RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
317 const std::string &typedefString);
318 void RewriteImplementations();
319 void RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
320 ObjCImplementationDecl *IMD,
321 ObjCCategoryImplDecl *CID);
322 void RewriteInterfaceDecl(ObjCInterfaceDecl *Dcl);
323 void RewriteImplementationDecl(Decl *Dcl);
324 void RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
325 ObjCMethodDecl *MDecl, std::string &ResultStr);
326 void RewriteTypeIntoString(QualType T, std::string &ResultStr,
327 const FunctionType *&FPRetType);
328 void RewriteByRefString(std::string &ResultStr, const std::string &Name,
329 ValueDecl *VD, bool def=false);
330 void RewriteCategoryDecl(ObjCCategoryDecl *Dcl);
331 void RewriteProtocolDecl(ObjCProtocolDecl *Dcl);
332 void RewriteForwardProtocolDecl(DeclGroupRef D);
333 void RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG);
334 void RewriteMethodDeclaration(ObjCMethodDecl *Method);
335 void RewriteProperty(ObjCPropertyDecl *prop);
336 void RewriteFunctionDecl(FunctionDecl *FD);
337 void RewriteBlockPointerType(std::string& Str, QualType Type);
338 void RewriteBlockPointerTypeVariable(std::string& Str, ValueDecl *VD);
339 void RewriteBlockLiteralFunctionDecl(FunctionDecl *FD);
340 void RewriteObjCQualifiedInterfaceTypes(Decl *Dcl);
341 void RewriteTypeOfDecl(VarDecl *VD);
342 void RewriteObjCQualifiedInterfaceTypes(Expr *E);
343
344 std::string getIvarAccessString(ObjCIvarDecl *D);
345
346 // Expression Rewriting.
347 Stmt *RewriteFunctionBodyOrGlobalInitializer(Stmt *S);
348 Stmt *RewriteAtEncode(ObjCEncodeExpr *Exp);
349 Stmt *RewritePropertyOrImplicitGetter(PseudoObjectExpr *Pseudo);
350 Stmt *RewritePropertyOrImplicitSetter(PseudoObjectExpr *Pseudo);
351 Stmt *RewriteAtSelector(ObjCSelectorExpr *Exp);
352 Stmt *RewriteMessageExpr(ObjCMessageExpr *Exp);
353 Stmt *RewriteObjCStringLiteral(ObjCStringLiteral *Exp);
354 Stmt *RewriteObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Exp);
355 Stmt *RewriteObjCBoxedExpr(ObjCBoxedExpr *Exp);
356 Stmt *RewriteObjCArrayLiteralExpr(ObjCArrayLiteral *Exp);
357 Stmt *RewriteObjCDictionaryLiteralExpr(ObjCDictionaryLiteral *Exp);
358 Stmt *RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp);
359 Stmt *RewriteObjCTryStmt(ObjCAtTryStmt *S);
360 Stmt *RewriteObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S);
361 Stmt *RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S);
362 Stmt *RewriteObjCThrowStmt(ObjCAtThrowStmt *S);
363 Stmt *RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
364 SourceLocation OrigEnd);
365 Stmt *RewriteBreakStmt(BreakStmt *S);
366 Stmt *RewriteContinueStmt(ContinueStmt *S);
367 void RewriteCastExpr(CStyleCastExpr *CE);
368 void RewriteImplicitCastObjCExpr(CastExpr *IE);
369
370 // Computes ivar bitfield group no.
371 unsigned ObjCIvarBitfieldGroupNo(ObjCIvarDecl *IV);
372 // Names field decl. for ivar bitfield group.
373 void ObjCIvarBitfieldGroupDecl(ObjCIvarDecl *IV, std::string &Result);
374 // Names struct type for ivar bitfield group.
375 void ObjCIvarBitfieldGroupType(ObjCIvarDecl *IV, std::string &Result);
376 // Names symbol for ivar bitfield group field offset.
377 void ObjCIvarBitfieldGroupOffset(ObjCIvarDecl *IV, std::string &Result);
378 // Given an ivar bitfield, it builds (or finds) its group record type.
379 QualType GetGroupRecordTypeForObjCIvarBitfield(ObjCIvarDecl *IV);
380 QualType SynthesizeBitfieldGroupStructType(
381 ObjCIvarDecl *IV,
382 SmallVectorImpl<ObjCIvarDecl *> &IVars);
383
384 // Block rewriting.
385 void RewriteBlocksInFunctionProtoType(QualType funcType, NamedDecl *D);
386
387 // Block specific rewrite rules.
388 void RewriteBlockPointerDecl(NamedDecl *VD);
389 void RewriteByRefVar(VarDecl *VD, bool firstDecl, bool lastDecl);
390 Stmt *RewriteBlockDeclRefExpr(DeclRefExpr *VD);
391 Stmt *RewriteLocalVariableExternalStorage(DeclRefExpr *DRE);
392 void RewriteBlockPointerFunctionArgs(FunctionDecl *FD);
393
394 void RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
395 std::string &Result);
396
397 void RewriteObjCFieldDecl(FieldDecl *fieldDecl, std::string &Result);
398 bool IsTagDefinedInsideClass(ObjCContainerDecl *IDecl, TagDecl *Tag,
399 bool &IsNamedDefinition);
400 void RewriteLocallyDefinedNamedAggregates(FieldDecl *fieldDecl,
401 std::string &Result);
402
403 bool RewriteObjCFieldDeclType(QualType &Type, std::string &Result);
404
405 void RewriteIvarOffsetSymbols(ObjCInterfaceDecl *CDecl,
406 std::string &Result);
407
408 void Initialize(ASTContext &context) override;
409
410 // Misc. AST transformation routines. Sometimes they end up calling
411 // rewriting routines on the new ASTs.
412 CallExpr *SynthesizeCallToFunctionDecl(FunctionDecl *FD,
413 ArrayRef<Expr *> Args,
414 SourceLocation StartLoc=SourceLocation(),
415 SourceLocation EndLoc=SourceLocation());
416
417 Expr *SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
418 QualType returnType,
419 SmallVectorImpl<QualType> &ArgTypes,
420 SmallVectorImpl<Expr*> &MsgExprs,
421 ObjCMethodDecl *Method);
422
423 Stmt *SynthMessageExpr(ObjCMessageExpr *Exp,
424 SourceLocation StartLoc=SourceLocation(),
425 SourceLocation EndLoc=SourceLocation());
426
427 void SynthCountByEnumWithState(std::string &buf);
428 void SynthMsgSendFunctionDecl();
429 void SynthMsgSendSuperFunctionDecl();
430 void SynthMsgSendStretFunctionDecl();
431 void SynthMsgSendFpretFunctionDecl();
432 void SynthMsgSendSuperStretFunctionDecl();
433 void SynthGetClassFunctionDecl();
434 void SynthGetMetaClassFunctionDecl();
435 void SynthGetSuperClassFunctionDecl();
436 void SynthSelGetUidFunctionDecl();
437 void SynthSuperConstructorFunctionDecl();
438
439 // Rewriting metadata
440 template<typename MethodIterator>
441 void RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
442 MethodIterator MethodEnd,
443 bool IsInstanceMethod,
444 StringRef prefix,
445 StringRef ClassName,
446 std::string &Result);
447 void RewriteObjCProtocolMetaData(ObjCProtocolDecl *Protocol,
448 std::string &Result);
449 void RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
450 std::string &Result);
451 void RewriteClassSetupInitHook(std::string &Result);
452
453 void RewriteMetaDataIntoBuffer(std::string &Result);
454 void WriteImageInfo(std::string &Result);
455 void RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *CDecl,
456 std::string &Result);
457 void RewriteCategorySetupInitHook(std::string &Result);
458
459 // Rewriting ivar
460 void RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
461 std::string &Result);
462 Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV);
463
464
465 std::string SynthesizeByrefCopyDestroyHelper(VarDecl *VD, int flag);
466 std::string SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
467 StringRef funcName,
468 const std::string &Tag);
469 std::string SynthesizeBlockFunc(BlockExpr *CE, int i, StringRef funcName,
470 const std::string &Tag);
471 std::string SynthesizeBlockImpl(BlockExpr *CE, const std::string &Tag,
472 const std::string &Desc);
473 std::string SynthesizeBlockDescriptor(const std::string &DescTag,
474 const std::string &ImplTag, int i,
475 StringRef funcName, unsigned hasCopy);
476 Stmt *SynthesizeBlockCall(CallExpr *Exp, const Expr* BlockExp);
477 void SynthesizeBlockLiterals(SourceLocation FunLocStart,
478 StringRef FunName);
479 FunctionDecl *SynthBlockInitFunctionDecl(StringRef name);
480 Stmt *SynthBlockInitExpr(BlockExpr *Exp,
481 const SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs);
482
483 // Misc. helper routines.
484 QualType getProtocolType();
485 void WarnAboutReturnGotoStmts(Stmt *S);
486 void CheckFunctionPointerDecl(QualType dType, NamedDecl *ND);
487 void InsertBlockLiteralsWithinFunction(FunctionDecl *FD);
488 void InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD);
489
490 bool IsDeclStmtInForeachHeader(DeclStmt *DS);
491 void CollectBlockDeclRefInfo(BlockExpr *Exp);
492 void GetBlockDeclRefExprs(Stmt *S);
493 void GetInnerBlockDeclRefExprs(Stmt *S,
494 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
495 llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts);
496
497 // We avoid calling Type::isBlockPointerType(), since it operates on the
498 // canonical type. We only care if the top-level type is a closure pointer.
499 bool isTopLevelBlockPointerType(QualType T) {
500 return isa<BlockPointerType>(Val: T);
501 }
502
503 /// convertBlockPointerToFunctionPointer - Converts a block-pointer type
504 /// to a function pointer type and upon success, returns true; false
505 /// otherwise.
506 bool convertBlockPointerToFunctionPointer(QualType &T) {
507 if (isTopLevelBlockPointerType(T)) {
508 const auto *BPT = T->castAs<BlockPointerType>();
509 T = Context->getPointerType(T: BPT->getPointeeType());
510 return true;
511 }
512 return false;
513 }
514
515 bool convertObjCTypeToCStyleType(QualType &T);
516
517 bool needToScanForQualifiers(QualType T);
518 QualType getSuperStructType();
519 QualType getConstantStringStructType();
520 QualType convertFunctionTypeOfBlocks(const FunctionType *FT);
521
522 void convertToUnqualifiedObjCType(QualType &T) {
523 if (T->isObjCQualifiedIdType()) {
524 bool isConst = T.isConstQualified();
525 T = isConst ? Context->getObjCIdType().withConst()
526 : Context->getObjCIdType();
527 }
528 else if (T->isObjCQualifiedClassType())
529 T = Context->getObjCClassType();
530 else if (T->isObjCObjectPointerType() &&
531 T->getPointeeType()->isObjCQualifiedInterfaceType()) {
532 if (const ObjCObjectPointerType * OBJPT =
533 T->getAsObjCInterfacePointerType()) {
534 const ObjCInterfaceType *IFaceT = OBJPT->getInterfaceType();
535 T = QualType(IFaceT, 0);
536 T = Context->getPointerType(T);
537 }
538 }
539 }
540
541 // FIXME: This predicate seems like it would be useful to add to ASTContext.
542 bool isObjCType(QualType T) {
543 if (!LangOpts.ObjC)
544 return false;
545
546 QualType OCT = Context->getCanonicalType(T).getUnqualifiedType();
547
548 if (OCT == Context->getCanonicalType(T: Context->getObjCIdType()) ||
549 OCT == Context->getCanonicalType(T: Context->getObjCClassType()))
550 return true;
551
552 if (const PointerType *PT = OCT->getAs<PointerType>()) {
553 if (isa<ObjCInterfaceType>(Val: PT->getPointeeType()) ||
554 PT->getPointeeType()->isObjCQualifiedIdType())
555 return true;
556 }
557 return false;
558 }
559
560 bool PointerTypeTakesAnyBlockArguments(QualType QT);
561 bool PointerTypeTakesAnyObjCQualifiedType(QualType QT);
562 void GetExtentOfArgList(const char *Name, const char *&LParen,
563 const char *&RParen);
564
565 void QuoteDoublequotes(std::string &From, std::string &To) {
566 for (unsigned i = 0; i < From.length(); i++) {
567 if (From[i] == '"')
568 To += "\\\"";
569 else
570 To += From[i];
571 }
572 }
573
574 QualType getSimpleFunctionType(QualType result,
575 ArrayRef<QualType> args,
576 bool variadic = false) {
577 if (result == Context->getObjCInstanceType())
578 result = Context->getObjCIdType();
579 FunctionProtoType::ExtProtoInfo fpi;
580 fpi.Variadic = variadic;
581 return Context->getFunctionType(ResultTy: result, Args: args, EPI: fpi);
582 }
583
584 // Helper function: create a CStyleCastExpr with trivial type source info.
585 CStyleCastExpr* NoTypeInfoCStyleCastExpr(ASTContext *Ctx, QualType Ty,
586 CastKind Kind, Expr *E) {
587 TypeSourceInfo *TInfo = Ctx->getTrivialTypeSourceInfo(T: Ty, Loc: SourceLocation());
588 return CStyleCastExpr::Create(Context: *Ctx, T: Ty, VK: VK_PRValue, K: Kind, Op: E, BasePath: nullptr,
589 FPO: FPOptionsOverride(), WrittenTy: TInfo,
590 L: SourceLocation(), R: SourceLocation());
591 }
592
593 bool ImplementationIsNonLazy(const ObjCImplDecl *OD) const {
594 const IdentifierInfo *II = &Context->Idents.get(Name: "load");
595 Selector LoadSel = Context->Selectors.getSelector(NumArgs: 0, IIV: &II);
596 return OD->getClassMethod(Sel: LoadSel) != nullptr;
597 }
598
599 StringLiteral *getStringLiteral(StringRef Str) {
600 QualType StrType = Context->getConstantArrayType(
601 EltTy: Context->CharTy, ArySize: llvm::APInt(32, Str.size() + 1), SizeExpr: nullptr,
602 ASM: ArraySizeModifier::Normal, IndexTypeQuals: 0);
603 return StringLiteral::Create(Ctx: *Context, Str, Kind: StringLiteralKind::Ordinary,
604 /*Pascal=*/false, Ty: StrType, Loc: SourceLocation());
605 }
606 };
607} // end anonymous namespace
608
609void RewriteModernObjC::RewriteBlocksInFunctionProtoType(QualType funcType,
610 NamedDecl *D) {
611 if (const FunctionProtoType *fproto
612 = dyn_cast<FunctionProtoType>(Val: funcType.IgnoreParens())) {
613 for (const auto &I : fproto->param_types())
614 if (isTopLevelBlockPointerType(T: I)) {
615 // All the args are checked/rewritten. Don't call twice!
616 RewriteBlockPointerDecl(VD: D);
617 break;
618 }
619 }
620}
621
622void RewriteModernObjC::CheckFunctionPointerDecl(QualType funcType, NamedDecl *ND) {
623 const PointerType *PT = funcType->getAs<PointerType>();
624 if (PT && PointerTypeTakesAnyBlockArguments(QT: funcType))
625 RewriteBlocksInFunctionProtoType(funcType: PT->getPointeeType(), D: ND);
626}
627
628static bool IsHeaderFile(const std::string &Filename) {
629 std::string::size_type DotPos = Filename.rfind(c: '.');
630
631 if (DotPos == std::string::npos) {
632 // no file extension
633 return false;
634 }
635
636 std::string Ext = Filename.substr(pos: DotPos + 1);
637 // C header: .h
638 // C++ header: .hh or .H;
639 return Ext == "h" || Ext == "hh" || Ext == "H";
640}
641
642RewriteModernObjC::RewriteModernObjC(std::string inFile,
643 std::unique_ptr<raw_ostream> OS,
644 DiagnosticsEngine &D,
645 const LangOptions &LOpts,
646 bool silenceMacroWarn, bool LineInfo)
647 : Diags(D), LangOpts(LOpts), InFileName(inFile), OutFile(std::move(OS)),
648 SilenceRewriteMacroWarning(silenceMacroWarn), GenerateLineInfo(LineInfo) {
649 IsHeader = IsHeaderFile(Filename: inFile);
650 RewriteFailedDiag = Diags.getCustomDiagID(L: DiagnosticsEngine::Warning,
651 FormatString: "rewriting sub-expression within a macro (may not be correct)");
652 // FIXME. This should be an error. But if block is not called, it is OK. And it
653 // may break including some headers.
654 GlobalBlockRewriteFailedDiag = Diags.getCustomDiagID(L: DiagnosticsEngine::Warning,
655 FormatString: "rewriting block literal declared in global scope is not implemented");
656
657 TryFinallyContainsReturnDiag = Diags.getCustomDiagID(
658 L: DiagnosticsEngine::Warning,
659 FormatString: "rewriter doesn't support user-specified control flow semantics "
660 "for @try/@finally (code may not execute properly)");
661}
662
663std::unique_ptr<ASTConsumer> clang::CreateModernObjCRewriter(
664 const std::string &InFile, std::unique_ptr<raw_ostream> OS,
665 DiagnosticsEngine &Diags, const LangOptions &LOpts,
666 bool SilenceRewriteMacroWarning, bool LineInfo) {
667 return std::make_unique<RewriteModernObjC>(args: InFile, args: std::move(OS), args&: Diags,
668 args: LOpts, args&: SilenceRewriteMacroWarning,
669 args&: LineInfo);
670}
671
672void RewriteModernObjC::InitializeCommon(ASTContext &context) {
673 Context = &context;
674 SM = &Context->getSourceManager();
675 TUDecl = Context->getTranslationUnitDecl();
676 MsgSendFunctionDecl = nullptr;
677 MsgSendSuperFunctionDecl = nullptr;
678 MsgSendStretFunctionDecl = nullptr;
679 MsgSendSuperStretFunctionDecl = nullptr;
680 MsgSendFpretFunctionDecl = nullptr;
681 GetClassFunctionDecl = nullptr;
682 GetMetaClassFunctionDecl = nullptr;
683 GetSuperClassFunctionDecl = nullptr;
684 SelGetUidFunctionDecl = nullptr;
685 CFStringFunctionDecl = nullptr;
686 ConstantStringClassReference = nullptr;
687 NSStringRecord = nullptr;
688 CurMethodDef = nullptr;
689 CurFunctionDef = nullptr;
690 GlobalVarDecl = nullptr;
691 GlobalConstructionExp = nullptr;
692 SuperStructDecl = nullptr;
693 ProtocolTypeDecl = nullptr;
694 ConstantStringDecl = nullptr;
695 BcLabelCount = 0;
696 SuperConstructorFunctionDecl = nullptr;
697 NumObjCStringLiterals = 0;
698 PropParentMap = nullptr;
699 CurrentBody = nullptr;
700 DisableReplaceStmt = false;
701 objc_impl_method = false;
702
703 // Get the ID and start/end of the main file.
704 MainFileID = SM->getMainFileID();
705 llvm::MemoryBufferRef MainBuf = SM->getBufferOrFake(FID: MainFileID);
706 MainFileStart = MainBuf.getBufferStart();
707 MainFileEnd = MainBuf.getBufferEnd();
708
709 Rewrite.setSourceMgr(SM&: Context->getSourceManager(), LO: Context->getLangOpts());
710}
711
712//===----------------------------------------------------------------------===//
713// Top Level Driver Code
714//===----------------------------------------------------------------------===//
715
716void RewriteModernObjC::HandleTopLevelSingleDecl(Decl *D) {
717 if (Diags.hasErrorOccurred())
718 return;
719
720 // Two cases: either the decl could be in the main file, or it could be in a
721 // #included file. If the former, rewrite it now. If the later, check to see
722 // if we rewrote the #include/#import.
723 SourceLocation Loc = D->getLocation();
724 Loc = SM->getExpansionLoc(Loc);
725
726 // If this is for a builtin, ignore it.
727 if (Loc.isInvalid()) return;
728
729 // Look for built-in declarations that we need to refer during the rewrite.
730 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Val: D)) {
731 RewriteFunctionDecl(FD);
732 } else if (VarDecl *FVD = dyn_cast<VarDecl>(Val: D)) {
733 // declared in <Foundation/NSString.h>
734 if (FVD->getName() == "_NSConstantStringClassReference") {
735 ConstantStringClassReference = FVD;
736 return;
737 }
738 } else if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(Val: D)) {
739 RewriteCategoryDecl(Dcl: CD);
740 } else if (ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(Val: D)) {
741 if (PD->isThisDeclarationADefinition())
742 RewriteProtocolDecl(Dcl: PD);
743 } else if (LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(Val: D)) {
744 // Recurse into linkage specifications
745 for (DeclContext::decl_iterator DI = LSD->decls_begin(),
746 DIEnd = LSD->decls_end();
747 DI != DIEnd; ) {
748 if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>(Val: (*DI))) {
749 if (!IFace->isThisDeclarationADefinition()) {
750 SmallVector<Decl *, 8> DG;
751 SourceLocation StartLoc = IFace->getBeginLoc();
752 do {
753 if (isa<ObjCInterfaceDecl>(Val: *DI) &&
754 !cast<ObjCInterfaceDecl>(Val: *DI)->isThisDeclarationADefinition() &&
755 StartLoc == (*DI)->getBeginLoc())
756 DG.push_back(Elt: *DI);
757 else
758 break;
759
760 ++DI;
761 } while (DI != DIEnd);
762 RewriteForwardClassDecl(DG);
763 continue;
764 }
765 else {
766 // Keep track of all interface declarations seen.
767 ObjCInterfacesSeen.push_back(Elt: IFace);
768 ++DI;
769 continue;
770 }
771 }
772
773 if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>(Val: (*DI))) {
774 if (!Proto->isThisDeclarationADefinition()) {
775 SmallVector<Decl *, 8> DG;
776 SourceLocation StartLoc = Proto->getBeginLoc();
777 do {
778 if (isa<ObjCProtocolDecl>(Val: *DI) &&
779 !cast<ObjCProtocolDecl>(Val: *DI)->isThisDeclarationADefinition() &&
780 StartLoc == (*DI)->getBeginLoc())
781 DG.push_back(Elt: *DI);
782 else
783 break;
784
785 ++DI;
786 } while (DI != DIEnd);
787 RewriteForwardProtocolDecl(DG);
788 continue;
789 }
790 }
791
792 HandleTopLevelSingleDecl(D: *DI);
793 ++DI;
794 }
795 }
796 // If we have a decl in the main file, see if we should rewrite it.
797 if (SM->isWrittenInMainFile(Loc))
798 return HandleDeclInMainFile(D);
799}
800
801//===----------------------------------------------------------------------===//
802// Syntactic (non-AST) Rewriting Code
803//===----------------------------------------------------------------------===//
804
805void RewriteModernObjC::RewriteInclude() {
806 SourceLocation LocStart = SM->getLocForStartOfFile(FID: MainFileID);
807 StringRef MainBuf = SM->getBufferData(FID: MainFileID);
808 const char *MainBufStart = MainBuf.begin();
809 const char *MainBufEnd = MainBuf.end();
810 size_t ImportLen = strlen(s: "import");
811
812 // Loop over the whole file, looking for includes.
813 for (const char *BufPtr = MainBufStart; BufPtr < MainBufEnd; ++BufPtr) {
814 if (*BufPtr == '#') {
815 if (++BufPtr == MainBufEnd)
816 return;
817 while (*BufPtr == ' ' || *BufPtr == '\t')
818 if (++BufPtr == MainBufEnd)
819 return;
820 if (!strncmp(s1: BufPtr, s2: "import", n: ImportLen)) {
821 // replace import with include
822 SourceLocation ImportLoc =
823 LocStart.getLocWithOffset(Offset: BufPtr-MainBufStart);
824 ReplaceText(Start: ImportLoc, OrigLength: ImportLen, Str: "include");
825 BufPtr += ImportLen;
826 }
827 }
828 }
829}
830
831static void WriteInternalIvarName(const ObjCInterfaceDecl *IDecl,
832 ObjCIvarDecl *IvarDecl, std::string &Result) {
833 Result += "OBJC_IVAR_$_";
834 Result += IDecl->getName();
835 Result += "$";
836 Result += IvarDecl->getName();
837}
838
839std::string
840RewriteModernObjC::getIvarAccessString(ObjCIvarDecl *D) {
841 const ObjCInterfaceDecl *ClassDecl = D->getContainingInterface();
842
843 // Build name of symbol holding ivar offset.
844 std::string IvarOffsetName;
845 if (D->isBitField())
846 ObjCIvarBitfieldGroupOffset(IV: D, Result&: IvarOffsetName);
847 else
848 WriteInternalIvarName(IDecl: ClassDecl, IvarDecl: D, Result&: IvarOffsetName);
849
850 std::string S = "(*(";
851 QualType IvarT = D->getType();
852 if (D->isBitField())
853 IvarT = GetGroupRecordTypeForObjCIvarBitfield(IV: D);
854
855 if (!IvarT->getAs<TypedefType>() && IvarT->isRecordType()) {
856 RecordDecl *RD = IvarT->castAs<RecordType>()->getDecl();
857 RD = RD->getDefinition();
858 if (RD && !RD->getDeclName().getAsIdentifierInfo()) {
859 // decltype(((Foo_IMPL*)0)->bar) *
860 auto *CDecl = cast<ObjCContainerDecl>(Val: D->getDeclContext());
861 // ivar in class extensions requires special treatment.
862 if (ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(Val: CDecl))
863 CDecl = CatDecl->getClassInterface();
864 std::string RecName = std::string(CDecl->getName());
865 RecName += "_IMPL";
866 RecordDecl *RD = RecordDecl::Create(C: *Context, TK: TagTypeKind::Struct, DC: TUDecl,
867 StartLoc: SourceLocation(), IdLoc: SourceLocation(),
868 Id: &Context->Idents.get(Name: RecName));
869 QualType PtrStructIMPL = Context->getPointerType(T: Context->getTagDeclType(Decl: RD));
870 unsigned UnsignedIntSize =
871 static_cast<unsigned>(Context->getTypeSize(T: Context->UnsignedIntTy));
872 Expr *Zero = IntegerLiteral::Create(C: *Context,
873 V: llvm::APInt(UnsignedIntSize, 0),
874 type: Context->UnsignedIntTy, l: SourceLocation());
875 Zero = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: PtrStructIMPL, Kind: CK_BitCast, E: Zero);
876 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
877 Zero);
878 FieldDecl *FD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(),
879 IdLoc: SourceLocation(),
880 Id: &Context->Idents.get(Name: D->getNameAsString()),
881 T: IvarT, TInfo: nullptr,
882 /*BitWidth=*/BW: nullptr, /*Mutable=*/true,
883 InitStyle: ICIS_NoInit);
884 MemberExpr *ME = MemberExpr::CreateImplicit(
885 C: *Context, Base: PE, IsArrow: true, MemberDecl: FD, T: FD->getType(), VK: VK_LValue, OK: OK_Ordinary);
886 IvarT = Context->getDecltypeType(e: ME, UnderlyingType: ME->getType());
887 }
888 }
889 convertObjCTypeToCStyleType(T&: IvarT);
890 QualType castT = Context->getPointerType(T: IvarT);
891 std::string TypeString(castT.getAsString(Policy: Context->getPrintingPolicy()));
892 S += TypeString;
893 S += ")";
894
895 // ((char *)self + IVAR_OFFSET_SYMBOL_NAME)
896 S += "((char *)self + ";
897 S += IvarOffsetName;
898 S += "))";
899 if (D->isBitField()) {
900 S += ".";
901 S += D->getNameAsString();
902 }
903 ReferencedIvars[const_cast<ObjCInterfaceDecl *>(ClassDecl)].insert(X: D);
904 return S;
905}
906
907/// mustSynthesizeSetterGetterMethod - returns true if setter or getter has not
908/// been found in the class implementation. In this case, it must be synthesized.
909static bool mustSynthesizeSetterGetterMethod(ObjCImplementationDecl *IMP,
910 ObjCPropertyDecl *PD,
911 bool getter) {
912 auto *OMD = IMP->getInstanceMethod(Sel: getter ? PD->getGetterName()
913 : PD->getSetterName());
914 return !OMD || OMD->isSynthesizedAccessorStub();
915}
916
917void RewriteModernObjC::RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
918 ObjCImplementationDecl *IMD,
919 ObjCCategoryImplDecl *CID) {
920 static bool objcGetPropertyDefined = false;
921 static bool objcSetPropertyDefined = false;
922 SourceLocation startGetterSetterLoc;
923
924 if (PID->getBeginLoc().isValid()) {
925 SourceLocation startLoc = PID->getBeginLoc();
926 InsertText(Loc: startLoc, Str: "// ");
927 const char *startBuf = SM->getCharacterData(SL: startLoc);
928 assert((*startBuf == '@') && "bogus @synthesize location");
929 const char *semiBuf = strchr(s: startBuf, c: ';');
930 assert((*semiBuf == ';') && "@synthesize: can't find ';'");
931 startGetterSetterLoc = startLoc.getLocWithOffset(Offset: semiBuf-startBuf+1);
932 } else
933 startGetterSetterLoc = IMD ? IMD->getEndLoc() : CID->getEndLoc();
934
935 if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
936 return; // FIXME: is this correct?
937
938 // Generate the 'getter' function.
939 ObjCPropertyDecl *PD = PID->getPropertyDecl();
940 ObjCIvarDecl *OID = PID->getPropertyIvarDecl();
941 assert(IMD && OID && "Synthesized ivars must be attached to @implementation");
942
943 unsigned Attributes = PD->getPropertyAttributes();
944 if (mustSynthesizeSetterGetterMethod(IMP: IMD, PD, getter: true /*getter*/)) {
945 bool GenGetProperty =
946 !(Attributes & ObjCPropertyAttribute::kind_nonatomic) &&
947 (Attributes & (ObjCPropertyAttribute::kind_retain |
948 ObjCPropertyAttribute::kind_copy));
949 std::string Getr;
950 if (GenGetProperty && !objcGetPropertyDefined) {
951 objcGetPropertyDefined = true;
952 // FIXME. Is this attribute correct in all cases?
953 Getr = "\nextern \"C\" __declspec(dllimport) "
954 "id objc_getProperty(id, SEL, long, bool);\n";
955 }
956 RewriteObjCMethodDecl(IDecl: OID->getContainingInterface(),
957 MDecl: PID->getGetterMethodDecl(), ResultStr&: Getr);
958 Getr += "{ ";
959 // Synthesize an explicit cast to gain access to the ivar.
960 // See objc-act.c:objc_synthesize_new_getter() for details.
961 if (GenGetProperty) {
962 // return objc_getProperty(self, _cmd, offsetof(ClassDecl, OID), 1)
963 Getr += "typedef ";
964 const FunctionType *FPRetType = nullptr;
965 RewriteTypeIntoString(T: PID->getGetterMethodDecl()->getReturnType(), ResultStr&: Getr,
966 FPRetType);
967 Getr += " _TYPE";
968 if (FPRetType) {
969 Getr += ")"; // close the precedence "scope" for "*".
970
971 // Now, emit the argument types (if any).
972 if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(Val: FPRetType)){
973 Getr += "(";
974 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) {
975 if (i) Getr += ", ";
976 std::string ParamStr =
977 FT->getParamType(i).getAsString(Policy: Context->getPrintingPolicy());
978 Getr += ParamStr;
979 }
980 if (FT->isVariadic()) {
981 if (FT->getNumParams())
982 Getr += ", ";
983 Getr += "...";
984 }
985 Getr += ")";
986 } else
987 Getr += "()";
988 }
989 Getr += ";\n";
990 Getr += "return (_TYPE)";
991 Getr += "objc_getProperty(self, _cmd, ";
992 RewriteIvarOffsetComputation(ivar: OID, Result&: Getr);
993 Getr += ", 1)";
994 }
995 else
996 Getr += "return " + getIvarAccessString(D: OID);
997 Getr += "; }";
998 InsertText(Loc: startGetterSetterLoc, Str: Getr);
999 }
1000
1001 if (PD->isReadOnly() ||
1002 !mustSynthesizeSetterGetterMethod(IMP: IMD, PD, getter: false /*setter*/))
1003 return;
1004
1005 // Generate the 'setter' function.
1006 std::string Setr;
1007 bool GenSetProperty = Attributes & (ObjCPropertyAttribute::kind_retain |
1008 ObjCPropertyAttribute::kind_copy);
1009 if (GenSetProperty && !objcSetPropertyDefined) {
1010 objcSetPropertyDefined = true;
1011 // FIXME. Is this attribute correct in all cases?
1012 Setr = "\nextern \"C\" __declspec(dllimport) "
1013 "void objc_setProperty (id, SEL, long, id, bool, bool);\n";
1014 }
1015
1016 RewriteObjCMethodDecl(IDecl: OID->getContainingInterface(),
1017 MDecl: PID->getSetterMethodDecl(), ResultStr&: Setr);
1018 Setr += "{ ";
1019 // Synthesize an explicit cast to initialize the ivar.
1020 // See objc-act.c:objc_synthesize_new_setter() for details.
1021 if (GenSetProperty) {
1022 Setr += "objc_setProperty (self, _cmd, ";
1023 RewriteIvarOffsetComputation(ivar: OID, Result&: Setr);
1024 Setr += ", (id)";
1025 Setr += PD->getName();
1026 Setr += ", ";
1027 if (Attributes & ObjCPropertyAttribute::kind_nonatomic)
1028 Setr += "0, ";
1029 else
1030 Setr += "1, ";
1031 if (Attributes & ObjCPropertyAttribute::kind_copy)
1032 Setr += "1)";
1033 else
1034 Setr += "0)";
1035 }
1036 else {
1037 Setr += getIvarAccessString(D: OID) + " = ";
1038 Setr += PD->getName();
1039 }
1040 Setr += "; }\n";
1041 InsertText(Loc: startGetterSetterLoc, Str: Setr);
1042}
1043
1044static void RewriteOneForwardClassDecl(ObjCInterfaceDecl *ForwardDecl,
1045 std::string &typedefString) {
1046 typedefString += "\n#ifndef _REWRITER_typedef_";
1047 typedefString += ForwardDecl->getNameAsString();
1048 typedefString += "\n";
1049 typedefString += "#define _REWRITER_typedef_";
1050 typedefString += ForwardDecl->getNameAsString();
1051 typedefString += "\n";
1052 typedefString += "typedef struct objc_object ";
1053 typedefString += ForwardDecl->getNameAsString();
1054 // typedef struct { } _objc_exc_Classname;
1055 typedefString += ";\ntypedef struct {} _objc_exc_";
1056 typedefString += ForwardDecl->getNameAsString();
1057 typedefString += ";\n#endif\n";
1058}
1059
1060void RewriteModernObjC::RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
1061 const std::string &typedefString) {
1062 SourceLocation startLoc = ClassDecl->getBeginLoc();
1063 const char *startBuf = SM->getCharacterData(SL: startLoc);
1064 const char *semiPtr = strchr(s: startBuf, c: ';');
1065 // Replace the @class with typedefs corresponding to the classes.
1066 ReplaceText(Start: startLoc, OrigLength: semiPtr-startBuf+1, Str: typedefString);
1067}
1068
1069void RewriteModernObjC::RewriteForwardClassDecl(DeclGroupRef D) {
1070 std::string typedefString;
1071 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
1072 if (ObjCInterfaceDecl *ForwardDecl = dyn_cast<ObjCInterfaceDecl>(Val: *I)) {
1073 if (I == D.begin()) {
1074 // Translate to typedef's that forward reference structs with the same name
1075 // as the class. As a convenience, we include the original declaration
1076 // as a comment.
1077 typedefString += "// @class ";
1078 typedefString += ForwardDecl->getNameAsString();
1079 typedefString += ";";
1080 }
1081 RewriteOneForwardClassDecl(ForwardDecl, typedefString);
1082 }
1083 else
1084 HandleTopLevelSingleDecl(D: *I);
1085 }
1086 DeclGroupRef::iterator I = D.begin();
1087 RewriteForwardClassEpilogue(ClassDecl: cast<ObjCInterfaceDecl>(Val: *I), typedefString);
1088}
1089
1090void RewriteModernObjC::RewriteForwardClassDecl(
1091 const SmallVectorImpl<Decl *> &D) {
1092 std::string typedefString;
1093 for (unsigned i = 0; i < D.size(); i++) {
1094 ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(Val: D[i]);
1095 if (i == 0) {
1096 typedefString += "// @class ";
1097 typedefString += ForwardDecl->getNameAsString();
1098 typedefString += ";";
1099 }
1100 RewriteOneForwardClassDecl(ForwardDecl, typedefString);
1101 }
1102 RewriteForwardClassEpilogue(ClassDecl: cast<ObjCInterfaceDecl>(Val: D[0]), typedefString);
1103}
1104
1105void RewriteModernObjC::RewriteMethodDeclaration(ObjCMethodDecl *Method) {
1106 // When method is a synthesized one, such as a getter/setter there is
1107 // nothing to rewrite.
1108 if (Method->isImplicit())
1109 return;
1110 SourceLocation LocStart = Method->getBeginLoc();
1111 SourceLocation LocEnd = Method->getEndLoc();
1112
1113 if (SM->getExpansionLineNumber(Loc: LocEnd) >
1114 SM->getExpansionLineNumber(Loc: LocStart)) {
1115 InsertText(Loc: LocStart, Str: "#if 0\n");
1116 ReplaceText(Start: LocEnd, OrigLength: 1, Str: ";\n#endif\n");
1117 } else {
1118 InsertText(Loc: LocStart, Str: "// ");
1119 }
1120}
1121
1122void RewriteModernObjC::RewriteProperty(ObjCPropertyDecl *prop) {
1123 SourceLocation Loc = prop->getAtLoc();
1124
1125 ReplaceText(Start: Loc, OrigLength: 0, Str: "// ");
1126 // FIXME: handle properties that are declared across multiple lines.
1127}
1128
1129void RewriteModernObjC::RewriteCategoryDecl(ObjCCategoryDecl *CatDecl) {
1130 SourceLocation LocStart = CatDecl->getBeginLoc();
1131
1132 // FIXME: handle category headers that are declared across multiple lines.
1133 if (CatDecl->getIvarRBraceLoc().isValid()) {
1134 ReplaceText(Start: LocStart, OrigLength: 1, Str: "/** ");
1135 ReplaceText(Start: CatDecl->getIvarRBraceLoc(), OrigLength: 1, Str: "**/ ");
1136 }
1137 else {
1138 ReplaceText(Start: LocStart, OrigLength: 0, Str: "// ");
1139 }
1140
1141 for (auto *I : CatDecl->instance_properties())
1142 RewriteProperty(prop: I);
1143
1144 for (auto *I : CatDecl->instance_methods())
1145 RewriteMethodDeclaration(Method: I);
1146 for (auto *I : CatDecl->class_methods())
1147 RewriteMethodDeclaration(Method: I);
1148
1149 // Lastly, comment out the @end.
1150 ReplaceText(Start: CatDecl->getAtEndRange().getBegin(),
1151 OrigLength: strlen(s: "@end"), Str: "/* @end */\n");
1152}
1153
1154void RewriteModernObjC::RewriteProtocolDecl(ObjCProtocolDecl *PDecl) {
1155 SourceLocation LocStart = PDecl->getBeginLoc();
1156 assert(PDecl->isThisDeclarationADefinition());
1157
1158 // FIXME: handle protocol headers that are declared across multiple lines.
1159 ReplaceText(Start: LocStart, OrigLength: 0, Str: "// ");
1160
1161 for (auto *I : PDecl->instance_methods())
1162 RewriteMethodDeclaration(Method: I);
1163 for (auto *I : PDecl->class_methods())
1164 RewriteMethodDeclaration(Method: I);
1165 for (auto *I : PDecl->instance_properties())
1166 RewriteProperty(prop: I);
1167
1168 // Lastly, comment out the @end.
1169 SourceLocation LocEnd = PDecl->getAtEndRange().getBegin();
1170 ReplaceText(Start: LocEnd, OrigLength: strlen(s: "@end"), Str: "/* @end */\n");
1171
1172 // Must comment out @optional/@required
1173 const char *startBuf = SM->getCharacterData(SL: LocStart);
1174 const char *endBuf = SM->getCharacterData(SL: LocEnd);
1175 for (const char *p = startBuf; p < endBuf; p++) {
1176 if (*p == '@' && !strncmp(s1: p+1, s2: "optional", n: strlen(s: "optional"))) {
1177 SourceLocation OptionalLoc = LocStart.getLocWithOffset(Offset: p-startBuf);
1178 ReplaceText(Start: OptionalLoc, OrigLength: strlen(s: "@optional"), Str: "/* @optional */");
1179
1180 }
1181 else if (*p == '@' && !strncmp(s1: p+1, s2: "required", n: strlen(s: "required"))) {
1182 SourceLocation OptionalLoc = LocStart.getLocWithOffset(Offset: p-startBuf);
1183 ReplaceText(Start: OptionalLoc, OrigLength: strlen(s: "@required"), Str: "/* @required */");
1184
1185 }
1186 }
1187}
1188
1189void RewriteModernObjC::RewriteForwardProtocolDecl(DeclGroupRef D) {
1190 SourceLocation LocStart = (*D.begin())->getBeginLoc();
1191 if (LocStart.isInvalid())
1192 llvm_unreachable("Invalid SourceLocation");
1193 // FIXME: handle forward protocol that are declared across multiple lines.
1194 ReplaceText(Start: LocStart, OrigLength: 0, Str: "// ");
1195}
1196
1197void
1198RewriteModernObjC::RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG) {
1199 SourceLocation LocStart = DG[0]->getBeginLoc();
1200 if (LocStart.isInvalid())
1201 llvm_unreachable("Invalid SourceLocation");
1202 // FIXME: handle forward protocol that are declared across multiple lines.
1203 ReplaceText(Start: LocStart, OrigLength: 0, Str: "// ");
1204}
1205
1206void RewriteModernObjC::RewriteTypeIntoString(QualType T, std::string &ResultStr,
1207 const FunctionType *&FPRetType) {
1208 if (T->isObjCQualifiedIdType())
1209 ResultStr += "id";
1210 else if (T->isFunctionPointerType() ||
1211 T->isBlockPointerType()) {
1212 // needs special handling, since pointer-to-functions have special
1213 // syntax (where a decaration models use).
1214 QualType retType = T;
1215 QualType PointeeTy;
1216 if (const PointerType* PT = retType->getAs<PointerType>())
1217 PointeeTy = PT->getPointeeType();
1218 else if (const BlockPointerType *BPT = retType->getAs<BlockPointerType>())
1219 PointeeTy = BPT->getPointeeType();
1220 if ((FPRetType = PointeeTy->getAs<FunctionType>())) {
1221 ResultStr +=
1222 FPRetType->getReturnType().getAsString(Policy: Context->getPrintingPolicy());
1223 ResultStr += "(*";
1224 }
1225 } else
1226 ResultStr += T.getAsString(Policy: Context->getPrintingPolicy());
1227}
1228
1229void RewriteModernObjC::RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
1230 ObjCMethodDecl *OMD,
1231 std::string &ResultStr) {
1232 //fprintf(stderr,"In RewriteObjCMethodDecl\n");
1233 const FunctionType *FPRetType = nullptr;
1234 ResultStr += "\nstatic ";
1235 RewriteTypeIntoString(T: OMD->getReturnType(), ResultStr, FPRetType);
1236 ResultStr += " ";
1237
1238 // Unique method name
1239 std::string NameStr;
1240
1241 if (OMD->isInstanceMethod())
1242 NameStr += "_I_";
1243 else
1244 NameStr += "_C_";
1245
1246 NameStr += IDecl->getNameAsString();
1247 NameStr += "_";
1248
1249 if (ObjCCategoryImplDecl *CID =
1250 dyn_cast<ObjCCategoryImplDecl>(Val: OMD->getDeclContext())) {
1251 NameStr += CID->getNameAsString();
1252 NameStr += "_";
1253 }
1254 // Append selector names, replacing ':' with '_'
1255 {
1256 std::string selString = OMD->getSelector().getAsString();
1257 int len = selString.size();
1258 for (int i = 0; i < len; i++)
1259 if (selString[i] == ':')
1260 selString[i] = '_';
1261 NameStr += selString;
1262 }
1263 // Remember this name for metadata emission
1264 MethodInternalNames[OMD] = NameStr;
1265 ResultStr += NameStr;
1266
1267 // Rewrite arguments
1268 ResultStr += "(";
1269
1270 // invisible arguments
1271 if (OMD->isInstanceMethod()) {
1272 QualType selfTy = Context->getObjCInterfaceType(Decl: IDecl);
1273 selfTy = Context->getPointerType(T: selfTy);
1274 if (!LangOpts.MicrosoftExt) {
1275 if (ObjCSynthesizedStructs.count(Ptr: const_cast<ObjCInterfaceDecl*>(IDecl)))
1276 ResultStr += "struct ";
1277 }
1278 // When rewriting for Microsoft, explicitly omit the structure name.
1279 ResultStr += IDecl->getNameAsString();
1280 ResultStr += " *";
1281 }
1282 else
1283 ResultStr += Context->getObjCClassType().getAsString(
1284 Policy: Context->getPrintingPolicy());
1285
1286 ResultStr += " self, ";
1287 ResultStr += Context->getObjCSelType().getAsString(Policy: Context->getPrintingPolicy());
1288 ResultStr += " _cmd";
1289
1290 // Method arguments.
1291 for (const auto *PDecl : OMD->parameters()) {
1292 ResultStr += ", ";
1293 if (PDecl->getType()->isObjCQualifiedIdType()) {
1294 ResultStr += "id ";
1295 ResultStr += PDecl->getNameAsString();
1296 } else {
1297 std::string Name = PDecl->getNameAsString();
1298 QualType QT = PDecl->getType();
1299 // Make sure we convert "t (^)(...)" to "t (*)(...)".
1300 (void)convertBlockPointerToFunctionPointer(T&: QT);
1301 QT.getAsStringInternal(Str&: Name, Policy: Context->getPrintingPolicy());
1302 ResultStr += Name;
1303 }
1304 }
1305 if (OMD->isVariadic())
1306 ResultStr += ", ...";
1307 ResultStr += ") ";
1308
1309 if (FPRetType) {
1310 ResultStr += ")"; // close the precedence "scope" for "*".
1311
1312 // Now, emit the argument types (if any).
1313 if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(Val: FPRetType)) {
1314 ResultStr += "(";
1315 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) {
1316 if (i) ResultStr += ", ";
1317 std::string ParamStr =
1318 FT->getParamType(i).getAsString(Policy: Context->getPrintingPolicy());
1319 ResultStr += ParamStr;
1320 }
1321 if (FT->isVariadic()) {
1322 if (FT->getNumParams())
1323 ResultStr += ", ";
1324 ResultStr += "...";
1325 }
1326 ResultStr += ")";
1327 } else {
1328 ResultStr += "()";
1329 }
1330 }
1331}
1332
1333void RewriteModernObjC::RewriteImplementationDecl(Decl *OID) {
1334 ObjCImplementationDecl *IMD = dyn_cast<ObjCImplementationDecl>(Val: OID);
1335 ObjCCategoryImplDecl *CID = dyn_cast<ObjCCategoryImplDecl>(Val: OID);
1336 assert((IMD || CID) && "Unknown implementation type");
1337
1338 if (IMD) {
1339 if (IMD->getIvarRBraceLoc().isValid()) {
1340 ReplaceText(Start: IMD->getBeginLoc(), OrigLength: 1, Str: "/** ");
1341 ReplaceText(Start: IMD->getIvarRBraceLoc(), OrigLength: 1, Str: "**/ ");
1342 }
1343 else {
1344 InsertText(Loc: IMD->getBeginLoc(), Str: "// ");
1345 }
1346 }
1347 else
1348 InsertText(Loc: CID->getBeginLoc(), Str: "// ");
1349
1350 for (auto *OMD : IMD ? IMD->instance_methods() : CID->instance_methods()) {
1351 if (!OMD->getBody())
1352 continue;
1353 std::string ResultStr;
1354 RewriteObjCMethodDecl(IDecl: OMD->getClassInterface(), OMD, ResultStr);
1355 SourceLocation LocStart = OMD->getBeginLoc();
1356 SourceLocation LocEnd = OMD->getCompoundBody()->getBeginLoc();
1357
1358 const char *startBuf = SM->getCharacterData(SL: LocStart);
1359 const char *endBuf = SM->getCharacterData(SL: LocEnd);
1360 ReplaceText(Start: LocStart, OrigLength: endBuf-startBuf, Str: ResultStr);
1361 }
1362
1363 for (auto *OMD : IMD ? IMD->class_methods() : CID->class_methods()) {
1364 if (!OMD->getBody())
1365 continue;
1366 std::string ResultStr;
1367 RewriteObjCMethodDecl(IDecl: OMD->getClassInterface(), OMD, ResultStr);
1368 SourceLocation LocStart = OMD->getBeginLoc();
1369 SourceLocation LocEnd = OMD->getCompoundBody()->getBeginLoc();
1370
1371 const char *startBuf = SM->getCharacterData(SL: LocStart);
1372 const char *endBuf = SM->getCharacterData(SL: LocEnd);
1373 ReplaceText(Start: LocStart, OrigLength: endBuf-startBuf, Str: ResultStr);
1374 }
1375 for (auto *I : IMD ? IMD->property_impls() : CID->property_impls())
1376 RewritePropertyImplDecl(PID: I, IMD, CID);
1377
1378 InsertText(Loc: IMD ? IMD->getEndLoc() : CID->getEndLoc(), Str: "// ");
1379}
1380
1381void RewriteModernObjC::RewriteInterfaceDecl(ObjCInterfaceDecl *ClassDecl) {
1382 // Do not synthesize more than once.
1383 if (ObjCSynthesizedStructs.count(Ptr: ClassDecl))
1384 return;
1385 // Make sure super class's are written before current class is written.
1386 ObjCInterfaceDecl *SuperClass = ClassDecl->getSuperClass();
1387 while (SuperClass) {
1388 RewriteInterfaceDecl(ClassDecl: SuperClass);
1389 SuperClass = SuperClass->getSuperClass();
1390 }
1391 std::string ResultStr;
1392 if (!ObjCWrittenInterfaces.count(Ptr: ClassDecl->getCanonicalDecl())) {
1393 // we haven't seen a forward decl - generate a typedef.
1394 RewriteOneForwardClassDecl(ForwardDecl: ClassDecl, typedefString&: ResultStr);
1395 RewriteIvarOffsetSymbols(CDecl: ClassDecl, Result&: ResultStr);
1396
1397 RewriteObjCInternalStruct(CDecl: ClassDecl, Result&: ResultStr);
1398 // Mark this typedef as having been written into its c++ equivalent.
1399 ObjCWrittenInterfaces.insert(Ptr: ClassDecl->getCanonicalDecl());
1400
1401 for (auto *I : ClassDecl->instance_properties())
1402 RewriteProperty(prop: I);
1403 for (auto *I : ClassDecl->instance_methods())
1404 RewriteMethodDeclaration(Method: I);
1405 for (auto *I : ClassDecl->class_methods())
1406 RewriteMethodDeclaration(Method: I);
1407
1408 // Lastly, comment out the @end.
1409 ReplaceText(Start: ClassDecl->getAtEndRange().getBegin(), OrigLength: strlen(s: "@end"),
1410 Str: "/* @end */\n");
1411 }
1412}
1413
1414Stmt *RewriteModernObjC::RewritePropertyOrImplicitSetter(PseudoObjectExpr *PseudoOp) {
1415 SourceRange OldRange = PseudoOp->getSourceRange();
1416
1417 // We just magically know some things about the structure of this
1418 // expression.
1419 ObjCMessageExpr *OldMsg =
1420 cast<ObjCMessageExpr>(Val: PseudoOp->getSemanticExpr(
1421 index: PseudoOp->getNumSemanticExprs() - 1));
1422
1423 // Because the rewriter doesn't allow us to rewrite rewritten code,
1424 // we need to suppress rewriting the sub-statements.
1425 Expr *Base;
1426 SmallVector<Expr*, 2> Args;
1427 {
1428 DisableReplaceStmtScope S(*this);
1429
1430 // Rebuild the base expression if we have one.
1431 Base = nullptr;
1432 if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1433 Base = OldMsg->getInstanceReceiver();
1434 Base = cast<OpaqueValueExpr>(Val: Base)->getSourceExpr();
1435 Base = cast<Expr>(Val: RewriteFunctionBodyOrGlobalInitializer(S: Base));
1436 }
1437
1438 unsigned numArgs = OldMsg->getNumArgs();
1439 for (unsigned i = 0; i < numArgs; i++) {
1440 Expr *Arg = OldMsg->getArg(Arg: i);
1441 if (isa<OpaqueValueExpr>(Val: Arg))
1442 Arg = cast<OpaqueValueExpr>(Val: Arg)->getSourceExpr();
1443 Arg = cast<Expr>(Val: RewriteFunctionBodyOrGlobalInitializer(S: Arg));
1444 Args.push_back(Elt: Arg);
1445 }
1446 }
1447
1448 // TODO: avoid this copy.
1449 SmallVector<SourceLocation, 1> SelLocs;
1450 OldMsg->getSelectorLocs(SelLocs);
1451
1452 ObjCMessageExpr *NewMsg = nullptr;
1453 switch (OldMsg->getReceiverKind()) {
1454 case ObjCMessageExpr::Class:
1455 NewMsg = ObjCMessageExpr::Create(Context: *Context, T: OldMsg->getType(),
1456 VK: OldMsg->getValueKind(),
1457 LBracLoc: OldMsg->getLeftLoc(),
1458 Receiver: OldMsg->getClassReceiverTypeInfo(),
1459 Sel: OldMsg->getSelector(),
1460 SelLocs,
1461 Method: OldMsg->getMethodDecl(),
1462 Args,
1463 RBracLoc: OldMsg->getRightLoc(),
1464 isImplicit: OldMsg->isImplicit());
1465 break;
1466
1467 case ObjCMessageExpr::Instance:
1468 NewMsg = ObjCMessageExpr::Create(Context: *Context, T: OldMsg->getType(),
1469 VK: OldMsg->getValueKind(),
1470 LBracLoc: OldMsg->getLeftLoc(),
1471 Receiver: Base,
1472 Sel: OldMsg->getSelector(),
1473 SeLocs: SelLocs,
1474 Method: OldMsg->getMethodDecl(),
1475 Args,
1476 RBracLoc: OldMsg->getRightLoc(),
1477 isImplicit: OldMsg->isImplicit());
1478 break;
1479
1480 case ObjCMessageExpr::SuperClass:
1481 case ObjCMessageExpr::SuperInstance:
1482 NewMsg = ObjCMessageExpr::Create(Context: *Context, T: OldMsg->getType(),
1483 VK: OldMsg->getValueKind(),
1484 LBracLoc: OldMsg->getLeftLoc(),
1485 SuperLoc: OldMsg->getSuperLoc(),
1486 IsInstanceSuper: OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1487 SuperType: OldMsg->getSuperType(),
1488 Sel: OldMsg->getSelector(),
1489 SelLocs,
1490 Method: OldMsg->getMethodDecl(),
1491 Args,
1492 RBracLoc: OldMsg->getRightLoc(),
1493 isImplicit: OldMsg->isImplicit());
1494 break;
1495 }
1496
1497 Stmt *Replacement = SynthMessageExpr(Exp: NewMsg);
1498 ReplaceStmtWithRange(Old: PseudoOp, New: Replacement, SrcRange: OldRange);
1499 return Replacement;
1500}
1501
1502Stmt *RewriteModernObjC::RewritePropertyOrImplicitGetter(PseudoObjectExpr *PseudoOp) {
1503 SourceRange OldRange = PseudoOp->getSourceRange();
1504
1505 // We just magically know some things about the structure of this
1506 // expression.
1507 ObjCMessageExpr *OldMsg =
1508 cast<ObjCMessageExpr>(Val: PseudoOp->getResultExpr()->IgnoreImplicit());
1509
1510 // Because the rewriter doesn't allow us to rewrite rewritten code,
1511 // we need to suppress rewriting the sub-statements.
1512 Expr *Base = nullptr;
1513 SmallVector<Expr*, 1> Args;
1514 {
1515 DisableReplaceStmtScope S(*this);
1516 // Rebuild the base expression if we have one.
1517 if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1518 Base = OldMsg->getInstanceReceiver();
1519 Base = cast<OpaqueValueExpr>(Val: Base)->getSourceExpr();
1520 Base = cast<Expr>(Val: RewriteFunctionBodyOrGlobalInitializer(S: Base));
1521 }
1522 unsigned numArgs = OldMsg->getNumArgs();
1523 for (unsigned i = 0; i < numArgs; i++) {
1524 Expr *Arg = OldMsg->getArg(Arg: i);
1525 if (isa<OpaqueValueExpr>(Val: Arg))
1526 Arg = cast<OpaqueValueExpr>(Val: Arg)->getSourceExpr();
1527 Arg = cast<Expr>(Val: RewriteFunctionBodyOrGlobalInitializer(S: Arg));
1528 Args.push_back(Elt: Arg);
1529 }
1530 }
1531
1532 // Intentionally empty.
1533 SmallVector<SourceLocation, 1> SelLocs;
1534
1535 ObjCMessageExpr *NewMsg = nullptr;
1536 switch (OldMsg->getReceiverKind()) {
1537 case ObjCMessageExpr::Class:
1538 NewMsg = ObjCMessageExpr::Create(Context: *Context, T: OldMsg->getType(),
1539 VK: OldMsg->getValueKind(),
1540 LBracLoc: OldMsg->getLeftLoc(),
1541 Receiver: OldMsg->getClassReceiverTypeInfo(),
1542 Sel: OldMsg->getSelector(),
1543 SelLocs,
1544 Method: OldMsg->getMethodDecl(),
1545 Args,
1546 RBracLoc: OldMsg->getRightLoc(),
1547 isImplicit: OldMsg->isImplicit());
1548 break;
1549
1550 case ObjCMessageExpr::Instance:
1551 NewMsg = ObjCMessageExpr::Create(Context: *Context, T: OldMsg->getType(),
1552 VK: OldMsg->getValueKind(),
1553 LBracLoc: OldMsg->getLeftLoc(),
1554 Receiver: Base,
1555 Sel: OldMsg->getSelector(),
1556 SeLocs: SelLocs,
1557 Method: OldMsg->getMethodDecl(),
1558 Args,
1559 RBracLoc: OldMsg->getRightLoc(),
1560 isImplicit: OldMsg->isImplicit());
1561 break;
1562
1563 case ObjCMessageExpr::SuperClass:
1564 case ObjCMessageExpr::SuperInstance:
1565 NewMsg = ObjCMessageExpr::Create(Context: *Context, T: OldMsg->getType(),
1566 VK: OldMsg->getValueKind(),
1567 LBracLoc: OldMsg->getLeftLoc(),
1568 SuperLoc: OldMsg->getSuperLoc(),
1569 IsInstanceSuper: OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1570 SuperType: OldMsg->getSuperType(),
1571 Sel: OldMsg->getSelector(),
1572 SelLocs,
1573 Method: OldMsg->getMethodDecl(),
1574 Args,
1575 RBracLoc: OldMsg->getRightLoc(),
1576 isImplicit: OldMsg->isImplicit());
1577 break;
1578 }
1579
1580 Stmt *Replacement = SynthMessageExpr(Exp: NewMsg);
1581 ReplaceStmtWithRange(Old: PseudoOp, New: Replacement, SrcRange: OldRange);
1582 return Replacement;
1583}
1584
1585/// SynthCountByEnumWithState - To print:
1586/// ((NSUInteger (*)
1587/// (id, SEL, struct __objcFastEnumerationState *, id *, NSUInteger))
1588/// (void *)objc_msgSend)((id)l_collection,
1589/// sel_registerName(
1590/// "countByEnumeratingWithState:objects:count:"),
1591/// &enumState,
1592/// (id *)__rw_items, (NSUInteger)16)
1593///
1594void RewriteModernObjC::SynthCountByEnumWithState(std::string &buf) {
1595 buf += "((_WIN_NSUInteger (*) (id, SEL, struct __objcFastEnumerationState *, "
1596 "id *, _WIN_NSUInteger))(void *)objc_msgSend)";
1597 buf += "\n\t\t";
1598 buf += "((id)l_collection,\n\t\t";
1599 buf += "sel_registerName(\"countByEnumeratingWithState:objects:count:\"),";
1600 buf += "\n\t\t";
1601 buf += "&enumState, "
1602 "(id *)__rw_items, (_WIN_NSUInteger)16)";
1603}
1604
1605/// RewriteBreakStmt - Rewrite for a break-stmt inside an ObjC2's foreach
1606/// statement to exit to its outer synthesized loop.
1607///
1608Stmt *RewriteModernObjC::RewriteBreakStmt(BreakStmt *S) {
1609 if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Val: Stmts.back()))
1610 return S;
1611 // replace break with goto __break_label
1612 std::string buf;
1613
1614 SourceLocation startLoc = S->getBeginLoc();
1615 buf = "goto __break_label_";
1616 buf += utostr(X: ObjCBcLabelNo.back());
1617 ReplaceText(Start: startLoc, OrigLength: strlen(s: "break"), Str: buf);
1618
1619 return nullptr;
1620}
1621
1622void RewriteModernObjC::ConvertSourceLocationToLineDirective(
1623 SourceLocation Loc,
1624 std::string &LineString) {
1625 if (Loc.isFileID() && GenerateLineInfo) {
1626 LineString += "\n#line ";
1627 PresumedLoc PLoc = SM->getPresumedLoc(Loc);
1628 LineString += utostr(X: PLoc.getLine());
1629 LineString += " \"";
1630 LineString += Lexer::Stringify(Str: PLoc.getFilename());
1631 LineString += "\"\n";
1632 }
1633}
1634
1635/// RewriteContinueStmt - Rewrite for a continue-stmt inside an ObjC2's foreach
1636/// statement to continue with its inner synthesized loop.
1637///
1638Stmt *RewriteModernObjC::RewriteContinueStmt(ContinueStmt *S) {
1639 if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Val: Stmts.back()))
1640 return S;
1641 // replace continue with goto __continue_label
1642 std::string buf;
1643
1644 SourceLocation startLoc = S->getBeginLoc();
1645 buf = "goto __continue_label_";
1646 buf += utostr(X: ObjCBcLabelNo.back());
1647 ReplaceText(Start: startLoc, OrigLength: strlen(s: "continue"), Str: buf);
1648
1649 return nullptr;
1650}
1651
1652/// RewriteObjCForCollectionStmt - Rewriter for ObjC2's foreach statement.
1653/// It rewrites:
1654/// for ( type elem in collection) { stmts; }
1655
1656/// Into:
1657/// {
1658/// type elem;
1659/// struct __objcFastEnumerationState enumState = { 0 };
1660/// id __rw_items[16];
1661/// id l_collection = (id)collection;
1662/// NSUInteger limit = [l_collection countByEnumeratingWithState:&enumState
1663/// objects:__rw_items count:16];
1664/// if (limit) {
1665/// unsigned long startMutations = *enumState.mutationsPtr;
1666/// do {
1667/// unsigned long counter = 0;
1668/// do {
1669/// if (startMutations != *enumState.mutationsPtr)
1670/// objc_enumerationMutation(l_collection);
1671/// elem = (type)enumState.itemsPtr[counter++];
1672/// stmts;
1673/// __continue_label: ;
1674/// } while (counter < limit);
1675/// } while ((limit = [l_collection countByEnumeratingWithState:&enumState
1676/// objects:__rw_items count:16]));
1677/// elem = nil;
1678/// __break_label: ;
1679/// }
1680/// else
1681/// elem = nil;
1682/// }
1683///
1684Stmt *RewriteModernObjC::RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
1685 SourceLocation OrigEnd) {
1686 assert(!Stmts.empty() && "ObjCForCollectionStmt - Statement stack empty");
1687 assert(isa<ObjCForCollectionStmt>(Stmts.back()) &&
1688 "ObjCForCollectionStmt Statement stack mismatch");
1689 assert(!ObjCBcLabelNo.empty() &&
1690 "ObjCForCollectionStmt - Label No stack empty");
1691
1692 SourceLocation startLoc = S->getBeginLoc();
1693 const char *startBuf = SM->getCharacterData(SL: startLoc);
1694 StringRef elementName;
1695 std::string elementTypeAsString;
1696 std::string buf;
1697 // line directive first.
1698 SourceLocation ForEachLoc = S->getForLoc();
1699 ConvertSourceLocationToLineDirective(Loc: ForEachLoc, LineString&: buf);
1700 buf += "{\n\t";
1701 if (DeclStmt *DS = dyn_cast<DeclStmt>(Val: S->getElement())) {
1702 // type elem;
1703 NamedDecl* D = cast<NamedDecl>(Val: DS->getSingleDecl());
1704 QualType ElementType = cast<ValueDecl>(Val: D)->getType();
1705 if (ElementType->isObjCQualifiedIdType() ||
1706 ElementType->isObjCQualifiedInterfaceType())
1707 // Simply use 'id' for all qualified types.
1708 elementTypeAsString = "id";
1709 else
1710 elementTypeAsString = ElementType.getAsString(Policy: Context->getPrintingPolicy());
1711 buf += elementTypeAsString;
1712 buf += " ";
1713 elementName = D->getName();
1714 buf += elementName;
1715 buf += ";\n\t";
1716 }
1717 else {
1718 DeclRefExpr *DR = cast<DeclRefExpr>(Val: S->getElement());
1719 elementName = DR->getDecl()->getName();
1720 ValueDecl *VD = DR->getDecl();
1721 if (VD->getType()->isObjCQualifiedIdType() ||
1722 VD->getType()->isObjCQualifiedInterfaceType())
1723 // Simply use 'id' for all qualified types.
1724 elementTypeAsString = "id";
1725 else
1726 elementTypeAsString = VD->getType().getAsString(Policy: Context->getPrintingPolicy());
1727 }
1728
1729 // struct __objcFastEnumerationState enumState = { 0 };
1730 buf += "struct __objcFastEnumerationState enumState = { 0 };\n\t";
1731 // id __rw_items[16];
1732 buf += "id __rw_items[16];\n\t";
1733 // id l_collection = (id)
1734 buf += "id l_collection = (id)";
1735 // Find start location of 'collection' the hard way!
1736 const char *startCollectionBuf = startBuf;
1737 startCollectionBuf += 3; // skip 'for'
1738 startCollectionBuf = strchr(s: startCollectionBuf, c: '(');
1739 startCollectionBuf++; // skip '('
1740 // find 'in' and skip it.
1741 while (*startCollectionBuf != ' ' ||
1742 *(startCollectionBuf+1) != 'i' || *(startCollectionBuf+2) != 'n' ||
1743 (*(startCollectionBuf+3) != ' ' &&
1744 *(startCollectionBuf+3) != '[' && *(startCollectionBuf+3) != '('))
1745 startCollectionBuf++;
1746 startCollectionBuf += 3;
1747
1748 // Replace: "for (type element in" with string constructed thus far.
1749 ReplaceText(Start: startLoc, OrigLength: startCollectionBuf - startBuf, Str: buf);
1750 // Replace ')' in for '(' type elem in collection ')' with ';'
1751 SourceLocation rightParenLoc = S->getRParenLoc();
1752 const char *rparenBuf = SM->getCharacterData(SL: rightParenLoc);
1753 SourceLocation lparenLoc = startLoc.getLocWithOffset(Offset: rparenBuf-startBuf);
1754 buf = ";\n\t";
1755
1756 // unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
1757 // objects:__rw_items count:16];
1758 // which is synthesized into:
1759 // NSUInteger limit =
1760 // ((NSUInteger (*)
1761 // (id, SEL, struct __objcFastEnumerationState *, id *, NSUInteger))
1762 // (void *)objc_msgSend)((id)l_collection,
1763 // sel_registerName(
1764 // "countByEnumeratingWithState:objects:count:"),
1765 // (struct __objcFastEnumerationState *)&state,
1766 // (id *)__rw_items, (NSUInteger)16);
1767 buf += "_WIN_NSUInteger limit =\n\t\t";
1768 SynthCountByEnumWithState(buf);
1769 buf += ";\n\t";
1770 /// if (limit) {
1771 /// unsigned long startMutations = *enumState.mutationsPtr;
1772 /// do {
1773 /// unsigned long counter = 0;
1774 /// do {
1775 /// if (startMutations != *enumState.mutationsPtr)
1776 /// objc_enumerationMutation(l_collection);
1777 /// elem = (type)enumState.itemsPtr[counter++];
1778 buf += "if (limit) {\n\t";
1779 buf += "unsigned long startMutations = *enumState.mutationsPtr;\n\t";
1780 buf += "do {\n\t\t";
1781 buf += "unsigned long counter = 0;\n\t\t";
1782 buf += "do {\n\t\t\t";
1783 buf += "if (startMutations != *enumState.mutationsPtr)\n\t\t\t\t";
1784 buf += "objc_enumerationMutation(l_collection);\n\t\t\t";
1785 buf += elementName;
1786 buf += " = (";
1787 buf += elementTypeAsString;
1788 buf += ")enumState.itemsPtr[counter++];";
1789 // Replace ')' in for '(' type elem in collection ')' with all of these.
1790 ReplaceText(Start: lparenLoc, OrigLength: 1, Str: buf);
1791
1792 /// __continue_label: ;
1793 /// } while (counter < limit);
1794 /// } while ((limit = [l_collection countByEnumeratingWithState:&enumState
1795 /// objects:__rw_items count:16]));
1796 /// elem = nil;
1797 /// __break_label: ;
1798 /// }
1799 /// else
1800 /// elem = nil;
1801 /// }
1802 ///
1803 buf = ";\n\t";
1804 buf += "__continue_label_";
1805 buf += utostr(X: ObjCBcLabelNo.back());
1806 buf += ": ;";
1807 buf += "\n\t\t";
1808 buf += "} while (counter < limit);\n\t";
1809 buf += "} while ((limit = ";
1810 SynthCountByEnumWithState(buf);
1811 buf += "));\n\t";
1812 buf += elementName;
1813 buf += " = ((";
1814 buf += elementTypeAsString;
1815 buf += ")0);\n\t";
1816 buf += "__break_label_";
1817 buf += utostr(X: ObjCBcLabelNo.back());
1818 buf += ": ;\n\t";
1819 buf += "}\n\t";
1820 buf += "else\n\t\t";
1821 buf += elementName;
1822 buf += " = ((";
1823 buf += elementTypeAsString;
1824 buf += ")0);\n\t";
1825 buf += "}\n";
1826
1827 // Insert all these *after* the statement body.
1828 // FIXME: If this should support Obj-C++, support CXXTryStmt
1829 if (isa<CompoundStmt>(Val: S->getBody())) {
1830 SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(Offset: 1);
1831 InsertText(Loc: endBodyLoc, Str: buf);
1832 } else {
1833 /* Need to treat single statements specially. For example:
1834 *
1835 * for (A *a in b) if (stuff()) break;
1836 * for (A *a in b) xxxyy;
1837 *
1838 * The following code simply scans ahead to the semi to find the actual end.
1839 */
1840 const char *stmtBuf = SM->getCharacterData(SL: OrigEnd);
1841 const char *semiBuf = strchr(s: stmtBuf, c: ';');
1842 assert(semiBuf && "Can't find ';'");
1843 SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(Offset: semiBuf-stmtBuf+1);
1844 InsertText(Loc: endBodyLoc, Str: buf);
1845 }
1846 Stmts.pop_back();
1847 ObjCBcLabelNo.pop_back();
1848 return nullptr;
1849}
1850
1851static void Write_RethrowObject(std::string &buf) {
1852 buf += "{ struct _FIN { _FIN(id reth) : rethrow(reth) {}\n";
1853 buf += "\t~_FIN() { if (rethrow) objc_exception_throw(rethrow); }\n";
1854 buf += "\tid rethrow;\n";
1855 buf += "\t} _fin_force_rethow(_rethrow);";
1856}
1857
1858/// RewriteObjCSynchronizedStmt -
1859/// This routine rewrites @synchronized(expr) stmt;
1860/// into:
1861/// objc_sync_enter(expr);
1862/// @try stmt @finally { objc_sync_exit(expr); }
1863///
1864Stmt *RewriteModernObjC::RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
1865 // Get the start location and compute the semi location.
1866 SourceLocation startLoc = S->getBeginLoc();
1867 const char *startBuf = SM->getCharacterData(SL: startLoc);
1868
1869 assert((*startBuf == '@') && "bogus @synchronized location");
1870
1871 std::string buf;
1872 SourceLocation SynchLoc = S->getAtSynchronizedLoc();
1873 ConvertSourceLocationToLineDirective(Loc: SynchLoc, LineString&: buf);
1874 buf += "{ id _rethrow = 0; id _sync_obj = (id)";
1875
1876 const char *lparenBuf = startBuf;
1877 while (*lparenBuf != '(') lparenBuf++;
1878 ReplaceText(Start: startLoc, OrigLength: lparenBuf-startBuf+1, Str: buf);
1879
1880 buf = "; objc_sync_enter(_sync_obj);\n";
1881 buf += "try {\n\tstruct _SYNC_EXIT { _SYNC_EXIT(id arg) : sync_exit(arg) {}";
1882 buf += "\n\t~_SYNC_EXIT() {objc_sync_exit(sync_exit);}";
1883 buf += "\n\tid sync_exit;";
1884 buf += "\n\t} _sync_exit(_sync_obj);\n";
1885
1886 // We can't use S->getSynchExpr()->getEndLoc() to find the end location, since
1887 // the sync expression is typically a message expression that's already
1888 // been rewritten! (which implies the SourceLocation's are invalid).
1889 SourceLocation RParenExprLoc = S->getSynchBody()->getBeginLoc();
1890 const char *RParenExprLocBuf = SM->getCharacterData(SL: RParenExprLoc);
1891 while (*RParenExprLocBuf != ')') RParenExprLocBuf--;
1892 RParenExprLoc = startLoc.getLocWithOffset(Offset: RParenExprLocBuf-startBuf);
1893
1894 SourceLocation LBranceLoc = S->getSynchBody()->getBeginLoc();
1895 const char *LBraceLocBuf = SM->getCharacterData(SL: LBranceLoc);
1896 assert (*LBraceLocBuf == '{');
1897 ReplaceText(Start: RParenExprLoc, OrigLength: (LBraceLocBuf - SM->getCharacterData(SL: RParenExprLoc) + 1), Str: buf);
1898
1899 SourceLocation startRBraceLoc = S->getSynchBody()->getEndLoc();
1900 assert((*SM->getCharacterData(startRBraceLoc) == '}') &&
1901 "bogus @synchronized block");
1902
1903 buf = "} catch (id e) {_rethrow = e;}\n";
1904 Write_RethrowObject(buf);
1905 buf += "}\n";
1906 buf += "}\n";
1907
1908 ReplaceText(Start: startRBraceLoc, OrigLength: 1, Str: buf);
1909
1910 return nullptr;
1911}
1912
1913void RewriteModernObjC::WarnAboutReturnGotoStmts(Stmt *S)
1914{
1915 // Perform a bottom up traversal of all children.
1916 for (Stmt *SubStmt : S->children())
1917 if (SubStmt)
1918 WarnAboutReturnGotoStmts(S: SubStmt);
1919
1920 if (isa<ReturnStmt>(Val: S) || isa<GotoStmt>(Val: S)) {
1921 Diags.Report(Loc: Context->getFullLoc(Loc: S->getBeginLoc()),
1922 DiagID: TryFinallyContainsReturnDiag);
1923 }
1924}
1925
1926Stmt *RewriteModernObjC::RewriteObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S) {
1927 SourceLocation startLoc = S->getAtLoc();
1928 ReplaceText(Start: startLoc, OrigLength: strlen(s: "@autoreleasepool"), Str: "/* @autoreleasepool */");
1929 ReplaceText(Start: S->getSubStmt()->getBeginLoc(), OrigLength: 1,
1930 Str: "{ __AtAutoreleasePool __autoreleasepool; ");
1931
1932 return nullptr;
1933}
1934
1935Stmt *RewriteModernObjC::RewriteObjCTryStmt(ObjCAtTryStmt *S) {
1936 ObjCAtFinallyStmt *finalStmt = S->getFinallyStmt();
1937 bool noCatch = S->getNumCatchStmts() == 0;
1938 std::string buf;
1939 SourceLocation TryLocation = S->getAtTryLoc();
1940 ConvertSourceLocationToLineDirective(Loc: TryLocation, LineString&: buf);
1941
1942 if (finalStmt) {
1943 if (noCatch)
1944 buf += "{ id volatile _rethrow = 0;\n";
1945 else {
1946 buf += "{ id volatile _rethrow = 0;\ntry {\n";
1947 }
1948 }
1949 // Get the start location and compute the semi location.
1950 SourceLocation startLoc = S->getBeginLoc();
1951 const char *startBuf = SM->getCharacterData(SL: startLoc);
1952
1953 assert((*startBuf == '@') && "bogus @try location");
1954 if (finalStmt)
1955 ReplaceText(Start: startLoc, OrigLength: 1, Str: buf);
1956 else
1957 // @try -> try
1958 ReplaceText(Start: startLoc, OrigLength: 1, Str: "");
1959
1960 for (ObjCAtCatchStmt *Catch : S->catch_stmts()) {
1961 VarDecl *catchDecl = Catch->getCatchParamDecl();
1962
1963 startLoc = Catch->getBeginLoc();
1964 bool AtRemoved = false;
1965 if (catchDecl) {
1966 QualType t = catchDecl->getType();
1967 if (const ObjCObjectPointerType *Ptr =
1968 t->getAs<ObjCObjectPointerType>()) {
1969 // Should be a pointer to a class.
1970 ObjCInterfaceDecl *IDecl = Ptr->getObjectType()->getInterface();
1971 if (IDecl) {
1972 std::string Result;
1973 ConvertSourceLocationToLineDirective(Loc: Catch->getBeginLoc(), LineString&: Result);
1974
1975 startBuf = SM->getCharacterData(SL: startLoc);
1976 assert((*startBuf == '@') && "bogus @catch location");
1977 SourceLocation rParenLoc = Catch->getRParenLoc();
1978 const char *rParenBuf = SM->getCharacterData(SL: rParenLoc);
1979
1980 // _objc_exc_Foo *_e as argument to catch.
1981 Result += "catch (_objc_exc_"; Result += IDecl->getNameAsString();
1982 Result += " *_"; Result += catchDecl->getNameAsString();
1983 Result += ")";
1984 ReplaceText(Start: startLoc, OrigLength: rParenBuf-startBuf+1, Str: Result);
1985 // Foo *e = (Foo *)_e;
1986 Result.clear();
1987 Result = "{ ";
1988 Result += IDecl->getNameAsString();
1989 Result += " *"; Result += catchDecl->getNameAsString();
1990 Result += " = ("; Result += IDecl->getNameAsString(); Result += "*)";
1991 Result += "_"; Result += catchDecl->getNameAsString();
1992
1993 Result += "; ";
1994 SourceLocation lBraceLoc = Catch->getCatchBody()->getBeginLoc();
1995 ReplaceText(Start: lBraceLoc, OrigLength: 1, Str: Result);
1996 AtRemoved = true;
1997 }
1998 }
1999 }
2000 if (!AtRemoved)
2001 // @catch -> catch
2002 ReplaceText(Start: startLoc, OrigLength: 1, Str: "");
2003
2004 }
2005 if (finalStmt) {
2006 buf.clear();
2007 SourceLocation FinallyLoc = finalStmt->getBeginLoc();
2008
2009 if (noCatch) {
2010 ConvertSourceLocationToLineDirective(Loc: FinallyLoc, LineString&: buf);
2011 buf += "catch (id e) {_rethrow = e;}\n";
2012 }
2013 else {
2014 buf += "}\n";
2015 ConvertSourceLocationToLineDirective(Loc: FinallyLoc, LineString&: buf);
2016 buf += "catch (id e) {_rethrow = e;}\n";
2017 }
2018
2019 SourceLocation startFinalLoc = finalStmt->getBeginLoc();
2020 ReplaceText(Start: startFinalLoc, OrigLength: 8, Str: buf);
2021 Stmt *body = finalStmt->getFinallyBody();
2022 SourceLocation startFinalBodyLoc = body->getBeginLoc();
2023 buf.clear();
2024 Write_RethrowObject(buf);
2025 ReplaceText(Start: startFinalBodyLoc, OrigLength: 1, Str: buf);
2026
2027 SourceLocation endFinalBodyLoc = body->getEndLoc();
2028 ReplaceText(Start: endFinalBodyLoc, OrigLength: 1, Str: "}\n}");
2029 // Now check for any return/continue/go statements within the @try.
2030 WarnAboutReturnGotoStmts(S: S->getTryBody());
2031 }
2032
2033 return nullptr;
2034}
2035
2036// This can't be done with ReplaceStmt(S, ThrowExpr), since
2037// the throw expression is typically a message expression that's already
2038// been rewritten! (which implies the SourceLocation's are invalid).
2039Stmt *RewriteModernObjC::RewriteObjCThrowStmt(ObjCAtThrowStmt *S) {
2040 // Get the start location and compute the semi location.
2041 SourceLocation startLoc = S->getBeginLoc();
2042 const char *startBuf = SM->getCharacterData(SL: startLoc);
2043
2044 assert((*startBuf == '@') && "bogus @throw location");
2045
2046 std::string buf;
2047 /* void objc_exception_throw(id) __attribute__((noreturn)); */
2048 if (S->getThrowExpr())
2049 buf = "objc_exception_throw(";
2050 else
2051 buf = "throw";
2052
2053 // handle "@ throw" correctly.
2054 const char *wBuf = strchr(s: startBuf, c: 'w');
2055 assert((*wBuf == 'w') && "@throw: can't find 'w'");
2056 ReplaceText(Start: startLoc, OrigLength: wBuf-startBuf+1, Str: buf);
2057
2058 SourceLocation endLoc = S->getEndLoc();
2059 const char *endBuf = SM->getCharacterData(SL: endLoc);
2060 const char *semiBuf = strchr(s: endBuf, c: ';');
2061 assert((*semiBuf == ';') && "@throw: can't find ';'");
2062 SourceLocation semiLoc = startLoc.getLocWithOffset(Offset: semiBuf-startBuf);
2063 if (S->getThrowExpr())
2064 ReplaceText(Start: semiLoc, OrigLength: 1, Str: ");");
2065 return nullptr;
2066}
2067
2068Stmt *RewriteModernObjC::RewriteAtEncode(ObjCEncodeExpr *Exp) {
2069 // Create a new string expression.
2070 std::string StrEncoding;
2071 Context->getObjCEncodingForType(T: Exp->getEncodedType(), S&: StrEncoding);
2072 Expr *Replacement = getStringLiteral(Str: StrEncoding);
2073 ReplaceStmt(Old: Exp, New: Replacement);
2074
2075 // Replace this subexpr in the parent.
2076 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2077 return Replacement;
2078}
2079
2080Stmt *RewriteModernObjC::RewriteAtSelector(ObjCSelectorExpr *Exp) {
2081 if (!SelGetUidFunctionDecl)
2082 SynthSelGetUidFunctionDecl();
2083 assert(SelGetUidFunctionDecl && "Can't find sel_registerName() decl");
2084 // Create a call to sel_registerName("selName").
2085 SmallVector<Expr*, 8> SelExprs;
2086 SelExprs.push_back(Elt: getStringLiteral(Str: Exp->getSelector().getAsString()));
2087 CallExpr *SelExp = SynthesizeCallToFunctionDecl(FD: SelGetUidFunctionDecl,
2088 Args: SelExprs);
2089 ReplaceStmt(Old: Exp, New: SelExp);
2090 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2091 return SelExp;
2092}
2093
2094CallExpr *
2095RewriteModernObjC::SynthesizeCallToFunctionDecl(FunctionDecl *FD,
2096 ArrayRef<Expr *> Args,
2097 SourceLocation StartLoc,
2098 SourceLocation EndLoc) {
2099 // Get the type, we will need to reference it in a couple spots.
2100 QualType msgSendType = FD->getType();
2101
2102 // Create a reference to the objc_msgSend() declaration.
2103 DeclRefExpr *DRE = new (Context) DeclRefExpr(*Context, FD, false, msgSendType,
2104 VK_LValue, SourceLocation());
2105
2106 // Now, we cast the reference to a pointer to the objc_msgSend type.
2107 QualType pToFunc = Context->getPointerType(T: msgSendType);
2108 ImplicitCastExpr *ICE =
2109 ImplicitCastExpr::Create(Context: *Context, T: pToFunc, Kind: CK_FunctionToPointerDecay,
2110 Operand: DRE, BasePath: nullptr, Cat: VK_PRValue, FPO: FPOptionsOverride());
2111
2112 const auto *FT = msgSendType->castAs<FunctionType>();
2113 CallExpr *Exp =
2114 CallExpr::Create(Ctx: *Context, Fn: ICE, Args, Ty: FT->getCallResultType(Context: *Context),
2115 VK: VK_PRValue, RParenLoc: EndLoc, FPFeatures: FPOptionsOverride());
2116 return Exp;
2117}
2118
2119static bool scanForProtocolRefs(const char *startBuf, const char *endBuf,
2120 const char *&startRef, const char *&endRef) {
2121 while (startBuf < endBuf) {
2122 if (*startBuf == '<')
2123 startRef = startBuf; // mark the start.
2124 if (*startBuf == '>') {
2125 if (startRef && *startRef == '<') {
2126 endRef = startBuf; // mark the end.
2127 return true;
2128 }
2129 return false;
2130 }
2131 startBuf++;
2132 }
2133 return false;
2134}
2135
2136static void scanToNextArgument(const char *&argRef) {
2137 int angle = 0;
2138 while (*argRef != ')' && (*argRef != ',' || angle > 0)) {
2139 if (*argRef == '<')
2140 angle++;
2141 else if (*argRef == '>')
2142 angle--;
2143 argRef++;
2144 }
2145 assert(angle == 0 && "scanToNextArgument - bad protocol type syntax");
2146}
2147
2148bool RewriteModernObjC::needToScanForQualifiers(QualType T) {
2149 if (T->isObjCQualifiedIdType())
2150 return true;
2151 if (const PointerType *PT = T->getAs<PointerType>()) {
2152 if (PT->getPointeeType()->isObjCQualifiedIdType())
2153 return true;
2154 }
2155 if (T->isObjCObjectPointerType()) {
2156 T = T->getPointeeType();
2157 return T->isObjCQualifiedInterfaceType();
2158 }
2159 if (T->isArrayType()) {
2160 QualType ElemTy = Context->getBaseElementType(QT: T);
2161 return needToScanForQualifiers(T: ElemTy);
2162 }
2163 return false;
2164}
2165
2166void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Expr *E) {
2167 QualType Type = E->getType();
2168 if (needToScanForQualifiers(T: Type)) {
2169 SourceLocation Loc, EndLoc;
2170
2171 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(Val: E)) {
2172 Loc = ECE->getLParenLoc();
2173 EndLoc = ECE->getRParenLoc();
2174 } else {
2175 Loc = E->getBeginLoc();
2176 EndLoc = E->getEndLoc();
2177 }
2178 // This will defend against trying to rewrite synthesized expressions.
2179 if (Loc.isInvalid() || EndLoc.isInvalid())
2180 return;
2181
2182 const char *startBuf = SM->getCharacterData(SL: Loc);
2183 const char *endBuf = SM->getCharacterData(SL: EndLoc);
2184 const char *startRef = nullptr, *endRef = nullptr;
2185 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2186 // Get the locations of the startRef, endRef.
2187 SourceLocation LessLoc = Loc.getLocWithOffset(Offset: startRef-startBuf);
2188 SourceLocation GreaterLoc = Loc.getLocWithOffset(Offset: endRef-startBuf+1);
2189 // Comment out the protocol references.
2190 InsertText(Loc: LessLoc, Str: "/*");
2191 InsertText(Loc: GreaterLoc, Str: "*/");
2192 }
2193 }
2194}
2195
2196void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Decl *Dcl) {
2197 SourceLocation Loc;
2198 QualType Type;
2199 const FunctionProtoType *proto = nullptr;
2200 if (VarDecl *VD = dyn_cast<VarDecl>(Val: Dcl)) {
2201 Loc = VD->getLocation();
2202 Type = VD->getType();
2203 }
2204 else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Val: Dcl)) {
2205 Loc = FD->getLocation();
2206 // Check for ObjC 'id' and class types that have been adorned with protocol
2207 // information (id<p>, C<p>*). The protocol references need to be rewritten!
2208 const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2209 assert(funcType && "missing function type");
2210 proto = dyn_cast<FunctionProtoType>(Val: funcType);
2211 if (!proto)
2212 return;
2213 Type = proto->getReturnType();
2214 }
2215 else if (FieldDecl *FD = dyn_cast<FieldDecl>(Val: Dcl)) {
2216 Loc = FD->getLocation();
2217 Type = FD->getType();
2218 }
2219 else if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(Val: Dcl)) {
2220 Loc = TD->getLocation();
2221 Type = TD->getUnderlyingType();
2222 }
2223 else
2224 return;
2225
2226 if (needToScanForQualifiers(T: Type)) {
2227 // Since types are unique, we need to scan the buffer.
2228
2229 const char *endBuf = SM->getCharacterData(SL: Loc);
2230 const char *startBuf = endBuf;
2231 while (*startBuf != ';' && *startBuf != '<' && startBuf != MainFileStart)
2232 startBuf--; // scan backward (from the decl location) for return type.
2233 const char *startRef = nullptr, *endRef = nullptr;
2234 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2235 // Get the locations of the startRef, endRef.
2236 SourceLocation LessLoc = Loc.getLocWithOffset(Offset: startRef-endBuf);
2237 SourceLocation GreaterLoc = Loc.getLocWithOffset(Offset: endRef-endBuf+1);
2238 // Comment out the protocol references.
2239 InsertText(Loc: LessLoc, Str: "/*");
2240 InsertText(Loc: GreaterLoc, Str: "*/");
2241 }
2242 }
2243 if (!proto)
2244 return; // most likely, was a variable
2245 // Now check arguments.
2246 const char *startBuf = SM->getCharacterData(SL: Loc);
2247 const char *startFuncBuf = startBuf;
2248 for (unsigned i = 0; i < proto->getNumParams(); i++) {
2249 if (needToScanForQualifiers(T: proto->getParamType(i))) {
2250 // Since types are unique, we need to scan the buffer.
2251
2252 const char *endBuf = startBuf;
2253 // scan forward (from the decl location) for argument types.
2254 scanToNextArgument(argRef&: endBuf);
2255 const char *startRef = nullptr, *endRef = nullptr;
2256 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2257 // Get the locations of the startRef, endRef.
2258 SourceLocation LessLoc =
2259 Loc.getLocWithOffset(Offset: startRef-startFuncBuf);
2260 SourceLocation GreaterLoc =
2261 Loc.getLocWithOffset(Offset: endRef-startFuncBuf+1);
2262 // Comment out the protocol references.
2263 InsertText(Loc: LessLoc, Str: "/*");
2264 InsertText(Loc: GreaterLoc, Str: "*/");
2265 }
2266 startBuf = ++endBuf;
2267 }
2268 else {
2269 // If the function name is derived from a macro expansion, then the
2270 // argument buffer will not follow the name. Need to speak with Chris.
2271 while (*startBuf && *startBuf != ')' && *startBuf != ',')
2272 startBuf++; // scan forward (from the decl location) for argument types.
2273 startBuf++;
2274 }
2275 }
2276}
2277
2278void RewriteModernObjC::RewriteTypeOfDecl(VarDecl *ND) {
2279 QualType QT = ND->getType();
2280 const Type* TypePtr = QT->getAs<Type>();
2281 if (!isa<TypeOfExprType>(Val: TypePtr))
2282 return;
2283 while (isa<TypeOfExprType>(Val: TypePtr)) {
2284 const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(Val: TypePtr);
2285 QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
2286 TypePtr = QT->getAs<Type>();
2287 }
2288 // FIXME. This will not work for multiple declarators; as in:
2289 // __typeof__(a) b,c,d;
2290 std::string TypeAsString(QT.getAsString(Policy: Context->getPrintingPolicy()));
2291 SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
2292 const char *startBuf = SM->getCharacterData(SL: DeclLoc);
2293 if (ND->getInit()) {
2294 std::string Name(ND->getNameAsString());
2295 TypeAsString += " " + Name + " = ";
2296 Expr *E = ND->getInit();
2297 SourceLocation startLoc;
2298 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(Val: E))
2299 startLoc = ECE->getLParenLoc();
2300 else
2301 startLoc = E->getBeginLoc();
2302 startLoc = SM->getExpansionLoc(Loc: startLoc);
2303 const char *endBuf = SM->getCharacterData(SL: startLoc);
2304 ReplaceText(Start: DeclLoc, OrigLength: endBuf-startBuf-1, Str: TypeAsString);
2305 }
2306 else {
2307 SourceLocation X = ND->getEndLoc();
2308 X = SM->getExpansionLoc(Loc: X);
2309 const char *endBuf = SM->getCharacterData(SL: X);
2310 ReplaceText(Start: DeclLoc, OrigLength: endBuf-startBuf-1, Str: TypeAsString);
2311 }
2312}
2313
2314// SynthSelGetUidFunctionDecl - SEL sel_registerName(const char *str);
2315void RewriteModernObjC::SynthSelGetUidFunctionDecl() {
2316 IdentifierInfo *SelGetUidIdent = &Context->Idents.get(Name: "sel_registerName");
2317 SmallVector<QualType, 16> ArgTys;
2318 ArgTys.push_back(Elt: Context->getPointerType(T: Context->CharTy.withConst()));
2319 QualType getFuncType =
2320 getSimpleFunctionType(result: Context->getObjCSelType(), args: ArgTys);
2321 SelGetUidFunctionDecl = FunctionDecl::Create(C&: *Context, DC: TUDecl,
2322 StartLoc: SourceLocation(),
2323 NLoc: SourceLocation(),
2324 N: SelGetUidIdent, T: getFuncType,
2325 TInfo: nullptr, SC: SC_Extern);
2326}
2327
2328void RewriteModernObjC::RewriteFunctionDecl(FunctionDecl *FD) {
2329 // declared in <objc/objc.h>
2330 if (FD->getIdentifier() &&
2331 FD->getName() == "sel_registerName") {
2332 SelGetUidFunctionDecl = FD;
2333 return;
2334 }
2335 RewriteObjCQualifiedInterfaceTypes(Dcl: FD);
2336}
2337
2338void RewriteModernObjC::RewriteBlockPointerType(std::string& Str, QualType Type) {
2339 std::string TypeString(Type.getAsString(Policy: Context->getPrintingPolicy()));
2340 const char *argPtr = TypeString.c_str();
2341 if (!strchr(s: argPtr, c: '^')) {
2342 Str += TypeString;
2343 return;
2344 }
2345 while (*argPtr) {
2346 Str += (*argPtr == '^' ? '*' : *argPtr);
2347 argPtr++;
2348 }
2349}
2350
2351// FIXME. Consolidate this routine with RewriteBlockPointerType.
2352void RewriteModernObjC::RewriteBlockPointerTypeVariable(std::string& Str,
2353 ValueDecl *VD) {
2354 QualType Type = VD->getType();
2355 std::string TypeString(Type.getAsString(Policy: Context->getPrintingPolicy()));
2356 const char *argPtr = TypeString.c_str();
2357 int paren = 0;
2358 while (*argPtr) {
2359 switch (*argPtr) {
2360 case '(':
2361 Str += *argPtr;
2362 paren++;
2363 break;
2364 case ')':
2365 Str += *argPtr;
2366 paren--;
2367 break;
2368 case '^':
2369 Str += '*';
2370 if (paren == 1)
2371 Str += VD->getNameAsString();
2372 break;
2373 default:
2374 Str += *argPtr;
2375 break;
2376 }
2377 argPtr++;
2378 }
2379}
2380
2381void RewriteModernObjC::RewriteBlockLiteralFunctionDecl(FunctionDecl *FD) {
2382 SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
2383 const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2384 const FunctionProtoType *proto = dyn_cast<FunctionProtoType>(Val: funcType);
2385 if (!proto)
2386 return;
2387 QualType Type = proto->getReturnType();
2388 std::string FdStr = Type.getAsString(Policy: Context->getPrintingPolicy());
2389 FdStr += " ";
2390 FdStr += FD->getName();
2391 FdStr += "(";
2392 unsigned numArgs = proto->getNumParams();
2393 for (unsigned i = 0; i < numArgs; i++) {
2394 QualType ArgType = proto->getParamType(i);
2395 RewriteBlockPointerType(Str&: FdStr, Type: ArgType);
2396 if (i+1 < numArgs)
2397 FdStr += ", ";
2398 }
2399 if (FD->isVariadic()) {
2400 FdStr += (numArgs > 0) ? ", ...);\n" : "...);\n";
2401 }
2402 else
2403 FdStr += ");\n";
2404 InsertText(Loc: FunLocStart, Str: FdStr);
2405}
2406
2407// SynthSuperConstructorFunctionDecl - id __rw_objc_super(id obj, id super);
2408void RewriteModernObjC::SynthSuperConstructorFunctionDecl() {
2409 if (SuperConstructorFunctionDecl)
2410 return;
2411 IdentifierInfo *msgSendIdent = &Context->Idents.get(Name: "__rw_objc_super");
2412 SmallVector<QualType, 16> ArgTys;
2413 QualType argT = Context->getObjCIdType();
2414 assert(!argT.isNull() && "Can't find 'id' type");
2415 ArgTys.push_back(Elt: argT);
2416 ArgTys.push_back(Elt: argT);
2417 QualType msgSendType = getSimpleFunctionType(result: Context->getObjCIdType(),
2418 args: ArgTys);
2419 SuperConstructorFunctionDecl = FunctionDecl::Create(C&: *Context, DC: TUDecl,
2420 StartLoc: SourceLocation(),
2421 NLoc: SourceLocation(),
2422 N: msgSendIdent, T: msgSendType,
2423 TInfo: nullptr, SC: SC_Extern);
2424}
2425
2426// SynthMsgSendFunctionDecl - id objc_msgSend(id self, SEL op, ...);
2427void RewriteModernObjC::SynthMsgSendFunctionDecl() {
2428 IdentifierInfo *msgSendIdent = &Context->Idents.get(Name: "objc_msgSend");
2429 SmallVector<QualType, 16> ArgTys;
2430 QualType argT = Context->getObjCIdType();
2431 assert(!argT.isNull() && "Can't find 'id' type");
2432 ArgTys.push_back(Elt: argT);
2433 argT = Context->getObjCSelType();
2434 assert(!argT.isNull() && "Can't find 'SEL' type");
2435 ArgTys.push_back(Elt: argT);
2436 QualType msgSendType = getSimpleFunctionType(result: Context->getObjCIdType(),
2437 args: ArgTys, /*variadic=*/true);
2438 MsgSendFunctionDecl = FunctionDecl::Create(C&: *Context, DC: TUDecl,
2439 StartLoc: SourceLocation(),
2440 NLoc: SourceLocation(),
2441 N: msgSendIdent, T: msgSendType, TInfo: nullptr,
2442 SC: SC_Extern);
2443}
2444
2445// SynthMsgSendSuperFunctionDecl - id objc_msgSendSuper(void);
2446void RewriteModernObjC::SynthMsgSendSuperFunctionDecl() {
2447 IdentifierInfo *msgSendIdent = &Context->Idents.get(Name: "objc_msgSendSuper");
2448 SmallVector<QualType, 2> ArgTys;
2449 ArgTys.push_back(Elt: Context->VoidTy);
2450 QualType msgSendType = getSimpleFunctionType(result: Context->getObjCIdType(),
2451 args: ArgTys, /*variadic=*/true);
2452 MsgSendSuperFunctionDecl = FunctionDecl::Create(C&: *Context, DC: TUDecl,
2453 StartLoc: SourceLocation(),
2454 NLoc: SourceLocation(),
2455 N: msgSendIdent, T: msgSendType,
2456 TInfo: nullptr, SC: SC_Extern);
2457}
2458
2459// SynthMsgSendStretFunctionDecl - id objc_msgSend_stret(id self, SEL op, ...);
2460void RewriteModernObjC::SynthMsgSendStretFunctionDecl() {
2461 IdentifierInfo *msgSendIdent = &Context->Idents.get(Name: "objc_msgSend_stret");
2462 SmallVector<QualType, 16> ArgTys;
2463 QualType argT = Context->getObjCIdType();
2464 assert(!argT.isNull() && "Can't find 'id' type");
2465 ArgTys.push_back(Elt: argT);
2466 argT = Context->getObjCSelType();
2467 assert(!argT.isNull() && "Can't find 'SEL' type");
2468 ArgTys.push_back(Elt: argT);
2469 QualType msgSendType = getSimpleFunctionType(result: Context->getObjCIdType(),
2470 args: ArgTys, /*variadic=*/true);
2471 MsgSendStretFunctionDecl = FunctionDecl::Create(C&: *Context, DC: TUDecl,
2472 StartLoc: SourceLocation(),
2473 NLoc: SourceLocation(),
2474 N: msgSendIdent, T: msgSendType,
2475 TInfo: nullptr, SC: SC_Extern);
2476}
2477
2478// SynthMsgSendSuperStretFunctionDecl -
2479// id objc_msgSendSuper_stret(void);
2480void RewriteModernObjC::SynthMsgSendSuperStretFunctionDecl() {
2481 IdentifierInfo *msgSendIdent =
2482 &Context->Idents.get(Name: "objc_msgSendSuper_stret");
2483 SmallVector<QualType, 2> ArgTys;
2484 ArgTys.push_back(Elt: Context->VoidTy);
2485 QualType msgSendType = getSimpleFunctionType(result: Context->getObjCIdType(),
2486 args: ArgTys, /*variadic=*/true);
2487 MsgSendSuperStretFunctionDecl = FunctionDecl::Create(C&: *Context, DC: TUDecl,
2488 StartLoc: SourceLocation(),
2489 NLoc: SourceLocation(),
2490 N: msgSendIdent,
2491 T: msgSendType, TInfo: nullptr,
2492 SC: SC_Extern);
2493}
2494
2495// SynthMsgSendFpretFunctionDecl - double objc_msgSend_fpret(id self, SEL op, ...);
2496void RewriteModernObjC::SynthMsgSendFpretFunctionDecl() {
2497 IdentifierInfo *msgSendIdent = &Context->Idents.get(Name: "objc_msgSend_fpret");
2498 SmallVector<QualType, 16> ArgTys;
2499 QualType argT = Context->getObjCIdType();
2500 assert(!argT.isNull() && "Can't find 'id' type");
2501 ArgTys.push_back(Elt: argT);
2502 argT = Context->getObjCSelType();
2503 assert(!argT.isNull() && "Can't find 'SEL' type");
2504 ArgTys.push_back(Elt: argT);
2505 QualType msgSendType = getSimpleFunctionType(result: Context->DoubleTy,
2506 args: ArgTys, /*variadic=*/true);
2507 MsgSendFpretFunctionDecl = FunctionDecl::Create(C&: *Context, DC: TUDecl,
2508 StartLoc: SourceLocation(),
2509 NLoc: SourceLocation(),
2510 N: msgSendIdent, T: msgSendType,
2511 TInfo: nullptr, SC: SC_Extern);
2512}
2513
2514// SynthGetClassFunctionDecl - Class objc_getClass(const char *name);
2515void RewriteModernObjC::SynthGetClassFunctionDecl() {
2516 IdentifierInfo *getClassIdent = &Context->Idents.get(Name: "objc_getClass");
2517 SmallVector<QualType, 16> ArgTys;
2518 ArgTys.push_back(Elt: Context->getPointerType(T: Context->CharTy.withConst()));
2519 QualType getClassType = getSimpleFunctionType(result: Context->getObjCClassType(),
2520 args: ArgTys);
2521 GetClassFunctionDecl = FunctionDecl::Create(C&: *Context, DC: TUDecl,
2522 StartLoc: SourceLocation(),
2523 NLoc: SourceLocation(),
2524 N: getClassIdent, T: getClassType,
2525 TInfo: nullptr, SC: SC_Extern);
2526}
2527
2528// SynthGetSuperClassFunctionDecl - Class class_getSuperclass(Class cls);
2529void RewriteModernObjC::SynthGetSuperClassFunctionDecl() {
2530 IdentifierInfo *getSuperClassIdent =
2531 &Context->Idents.get(Name: "class_getSuperclass");
2532 SmallVector<QualType, 16> ArgTys;
2533 ArgTys.push_back(Elt: Context->getObjCClassType());
2534 QualType getClassType = getSimpleFunctionType(result: Context->getObjCClassType(),
2535 args: ArgTys);
2536 GetSuperClassFunctionDecl = FunctionDecl::Create(C&: *Context, DC: TUDecl,
2537 StartLoc: SourceLocation(),
2538 NLoc: SourceLocation(),
2539 N: getSuperClassIdent,
2540 T: getClassType, TInfo: nullptr,
2541 SC: SC_Extern);
2542}
2543
2544// SynthGetMetaClassFunctionDecl - Class objc_getMetaClass(const char *name);
2545void RewriteModernObjC::SynthGetMetaClassFunctionDecl() {
2546 IdentifierInfo *getClassIdent = &Context->Idents.get(Name: "objc_getMetaClass");
2547 SmallVector<QualType, 16> ArgTys;
2548 ArgTys.push_back(Elt: Context->getPointerType(T: Context->CharTy.withConst()));
2549 QualType getClassType = getSimpleFunctionType(result: Context->getObjCClassType(),
2550 args: ArgTys);
2551 GetMetaClassFunctionDecl = FunctionDecl::Create(C&: *Context, DC: TUDecl,
2552 StartLoc: SourceLocation(),
2553 NLoc: SourceLocation(),
2554 N: getClassIdent, T: getClassType,
2555 TInfo: nullptr, SC: SC_Extern);
2556}
2557
2558Stmt *RewriteModernObjC::RewriteObjCStringLiteral(ObjCStringLiteral *Exp) {
2559 assert (Exp != nullptr && "Expected non-null ObjCStringLiteral");
2560 QualType strType = getConstantStringStructType();
2561
2562 std::string S = "__NSConstantStringImpl_";
2563
2564 std::string tmpName = InFileName;
2565 unsigned i;
2566 for (i=0; i < tmpName.length(); i++) {
2567 char c = tmpName.at(n: i);
2568 // replace any non-alphanumeric characters with '_'.
2569 if (!isAlphanumeric(c))
2570 tmpName[i] = '_';
2571 }
2572 S += tmpName;
2573 S += "_";
2574 S += utostr(X: NumObjCStringLiterals++);
2575
2576 Preamble += "static __NSConstantStringImpl " + S;
2577 Preamble += " __attribute__ ((section (\"__DATA, __cfstring\"))) = {__CFConstantStringClassReference,";
2578 Preamble += "0x000007c8,"; // utf8_str
2579 // The pretty printer for StringLiteral handles escape characters properly.
2580 std::string prettyBufS;
2581 llvm::raw_string_ostream prettyBuf(prettyBufS);
2582 Exp->getString()->printPretty(OS&: prettyBuf, Helper: nullptr, Policy: PrintingPolicy(LangOpts));
2583 Preamble += prettyBufS;
2584 Preamble += ",";
2585 Preamble += utostr(X: Exp->getString()->getByteLength()) + "};\n";
2586
2587 VarDecl *NewVD = VarDecl::Create(C&: *Context, DC: TUDecl, StartLoc: SourceLocation(),
2588 IdLoc: SourceLocation(), Id: &Context->Idents.get(Name: S),
2589 T: strType, TInfo: nullptr, S: SC_Static);
2590 DeclRefExpr *DRE = new (Context)
2591 DeclRefExpr(*Context, NewVD, false, strType, VK_LValue, SourceLocation());
2592 Expr *Unop = UnaryOperator::Create(
2593 C: const_cast<ASTContext &>(*Context), input: DRE, opc: UO_AddrOf,
2594 type: Context->getPointerType(T: DRE->getType()), VK: VK_PRValue, OK: OK_Ordinary,
2595 l: SourceLocation(), CanOverflow: false, FPFeatures: FPOptionsOverride());
2596 // cast to NSConstantString *
2597 CastExpr *cast = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: Exp->getType(),
2598 Kind: CK_CPointerToObjCPointerCast, E: Unop);
2599 ReplaceStmt(Old: Exp, New: cast);
2600 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2601 return cast;
2602}
2603
2604Stmt *RewriteModernObjC::RewriteObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Exp) {
2605 unsigned IntSize =
2606 static_cast<unsigned>(Context->getTypeSize(T: Context->IntTy));
2607
2608 Expr *FlagExp = IntegerLiteral::Create(C: *Context,
2609 V: llvm::APInt(IntSize, Exp->getValue()),
2610 type: Context->IntTy, l: Exp->getLocation());
2611 CastExpr *cast = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: Context->ObjCBuiltinBoolTy,
2612 Kind: CK_BitCast, E: FlagExp);
2613 ParenExpr *PE = new (Context) ParenExpr(Exp->getLocation(), Exp->getExprLoc(),
2614 cast);
2615 ReplaceStmt(Old: Exp, New: PE);
2616 return PE;
2617}
2618
2619Stmt *RewriteModernObjC::RewriteObjCBoxedExpr(ObjCBoxedExpr *Exp) {
2620 // synthesize declaration of helper functions needed in this routine.
2621 if (!SelGetUidFunctionDecl)
2622 SynthSelGetUidFunctionDecl();
2623 // use objc_msgSend() for all.
2624 if (!MsgSendFunctionDecl)
2625 SynthMsgSendFunctionDecl();
2626 if (!GetClassFunctionDecl)
2627 SynthGetClassFunctionDecl();
2628
2629 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2630 SourceLocation StartLoc = Exp->getBeginLoc();
2631 SourceLocation EndLoc = Exp->getEndLoc();
2632
2633 // Synthesize a call to objc_msgSend().
2634 SmallVector<Expr*, 4> MsgExprs;
2635 SmallVector<Expr*, 4> ClsExprs;
2636
2637 // Create a call to objc_getClass("<BoxingClass>"). It will be the 1st argument.
2638 ObjCMethodDecl *BoxingMethod = Exp->getBoxingMethod();
2639 ObjCInterfaceDecl *BoxingClass = BoxingMethod->getClassInterface();
2640
2641 IdentifierInfo *clsName = BoxingClass->getIdentifier();
2642 ClsExprs.push_back(Elt: getStringLiteral(Str: clsName->getName()));
2643 CallExpr *Cls = SynthesizeCallToFunctionDecl(FD: GetClassFunctionDecl, Args: ClsExprs,
2644 StartLoc, EndLoc);
2645 MsgExprs.push_back(Elt: Cls);
2646
2647 // Create a call to sel_registerName("<BoxingMethod>:"), etc.
2648 // it will be the 2nd argument.
2649 SmallVector<Expr*, 4> SelExprs;
2650 SelExprs.push_back(
2651 Elt: getStringLiteral(Str: BoxingMethod->getSelector().getAsString()));
2652 CallExpr *SelExp = SynthesizeCallToFunctionDecl(FD: SelGetUidFunctionDecl,
2653 Args: SelExprs, StartLoc, EndLoc);
2654 MsgExprs.push_back(Elt: SelExp);
2655
2656 // User provided sub-expression is the 3rd, and last, argument.
2657 Expr *subExpr = Exp->getSubExpr();
2658 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(Val: subExpr)) {
2659 QualType type = ICE->getType();
2660 const Expr *SubExpr = ICE->IgnoreParenImpCasts();
2661 CastKind CK = CK_BitCast;
2662 if (SubExpr->getType()->isIntegralType(Ctx: *Context) && type->isBooleanType())
2663 CK = CK_IntegralToBoolean;
2664 subExpr = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: type, Kind: CK, E: subExpr);
2665 }
2666 MsgExprs.push_back(Elt: subExpr);
2667
2668 SmallVector<QualType, 4> ArgTypes;
2669 ArgTypes.push_back(Elt: Context->getObjCClassType());
2670 ArgTypes.push_back(Elt: Context->getObjCSelType());
2671 for (const auto PI : BoxingMethod->parameters())
2672 ArgTypes.push_back(Elt: PI->getType());
2673
2674 QualType returnType = Exp->getType();
2675 // Get the type, we will need to reference it in a couple spots.
2676 QualType msgSendType = MsgSendFlavor->getType();
2677
2678 // Create a reference to the objc_msgSend() declaration.
2679 DeclRefExpr *DRE = new (Context) DeclRefExpr(
2680 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2681
2682 CastExpr *cast = NoTypeInfoCStyleCastExpr(
2683 Ctx: Context, Ty: Context->getPointerType(T: Context->VoidTy), Kind: CK_BitCast, E: DRE);
2684
2685 // Now do the "normal" pointer to function cast.
2686 QualType castType =
2687 getSimpleFunctionType(result: returnType, args: ArgTypes, variadic: BoxingMethod->isVariadic());
2688 castType = Context->getPointerType(T: castType);
2689 cast = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: castType, Kind: CK_BitCast,
2690 E: cast);
2691
2692 // Don't forget the parens to enforce the proper binding.
2693 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2694
2695 auto *FT = msgSendType->castAs<FunctionType>();
2696 CallExpr *CE = CallExpr::Create(Ctx: *Context, Fn: PE, Args: MsgExprs, Ty: FT->getReturnType(),
2697 VK: VK_PRValue, RParenLoc: EndLoc, FPFeatures: FPOptionsOverride());
2698 ReplaceStmt(Old: Exp, New: CE);
2699 return CE;
2700}
2701
2702Stmt *RewriteModernObjC::RewriteObjCArrayLiteralExpr(ObjCArrayLiteral *Exp) {
2703 // synthesize declaration of helper functions needed in this routine.
2704 if (!SelGetUidFunctionDecl)
2705 SynthSelGetUidFunctionDecl();
2706 // use objc_msgSend() for all.
2707 if (!MsgSendFunctionDecl)
2708 SynthMsgSendFunctionDecl();
2709 if (!GetClassFunctionDecl)
2710 SynthGetClassFunctionDecl();
2711
2712 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2713 SourceLocation StartLoc = Exp->getBeginLoc();
2714 SourceLocation EndLoc = Exp->getEndLoc();
2715
2716 // Build the expression: __NSContainer_literal(int, ...).arr
2717 QualType IntQT = Context->IntTy;
2718 QualType NSArrayFType =
2719 getSimpleFunctionType(result: Context->VoidTy, args: IntQT, variadic: true);
2720 std::string NSArrayFName("__NSContainer_literal");
2721 FunctionDecl *NSArrayFD = SynthBlockInitFunctionDecl(name: NSArrayFName);
2722 DeclRefExpr *NSArrayDRE = new (Context) DeclRefExpr(
2723 *Context, NSArrayFD, false, NSArrayFType, VK_PRValue, SourceLocation());
2724
2725 SmallVector<Expr*, 16> InitExprs;
2726 unsigned NumElements = Exp->getNumElements();
2727 unsigned UnsignedIntSize =
2728 static_cast<unsigned>(Context->getTypeSize(T: Context->UnsignedIntTy));
2729 Expr *count = IntegerLiteral::Create(C: *Context,
2730 V: llvm::APInt(UnsignedIntSize, NumElements),
2731 type: Context->UnsignedIntTy, l: SourceLocation());
2732 InitExprs.push_back(Elt: count);
2733 for (unsigned i = 0; i < NumElements; i++)
2734 InitExprs.push_back(Elt: Exp->getElement(Index: i));
2735 Expr *NSArrayCallExpr =
2736 CallExpr::Create(Ctx: *Context, Fn: NSArrayDRE, Args: InitExprs, Ty: NSArrayFType, VK: VK_LValue,
2737 RParenLoc: SourceLocation(), FPFeatures: FPOptionsOverride());
2738
2739 FieldDecl *ARRFD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(),
2740 IdLoc: SourceLocation(),
2741 Id: &Context->Idents.get(Name: "arr"),
2742 T: Context->getPointerType(T: Context->VoidPtrTy),
2743 TInfo: nullptr, /*BitWidth=*/BW: nullptr,
2744 /*Mutable=*/true, InitStyle: ICIS_NoInit);
2745 MemberExpr *ArrayLiteralME =
2746 MemberExpr::CreateImplicit(C: *Context, Base: NSArrayCallExpr, IsArrow: false, MemberDecl: ARRFD,
2747 T: ARRFD->getType(), VK: VK_LValue, OK: OK_Ordinary);
2748 QualType ConstIdT = Context->getObjCIdType().withConst();
2749 CStyleCastExpr * ArrayLiteralObjects =
2750 NoTypeInfoCStyleCastExpr(Ctx: Context,
2751 Ty: Context->getPointerType(T: ConstIdT),
2752 Kind: CK_BitCast,
2753 E: ArrayLiteralME);
2754
2755 // Synthesize a call to objc_msgSend().
2756 SmallVector<Expr*, 32> MsgExprs;
2757 SmallVector<Expr*, 4> ClsExprs;
2758 QualType expType = Exp->getType();
2759
2760 // Create a call to objc_getClass("NSArray"). It will be th 1st argument.
2761 ObjCInterfaceDecl *Class =
2762 expType->getPointeeType()->castAs<ObjCObjectType>()->getInterface();
2763
2764 IdentifierInfo *clsName = Class->getIdentifier();
2765 ClsExprs.push_back(Elt: getStringLiteral(Str: clsName->getName()));
2766 CallExpr *Cls = SynthesizeCallToFunctionDecl(FD: GetClassFunctionDecl, Args: ClsExprs,
2767 StartLoc, EndLoc);
2768 MsgExprs.push_back(Elt: Cls);
2769
2770 // Create a call to sel_registerName("arrayWithObjects:count:").
2771 // it will be the 2nd argument.
2772 SmallVector<Expr*, 4> SelExprs;
2773 ObjCMethodDecl *ArrayMethod = Exp->getArrayWithObjectsMethod();
2774 SelExprs.push_back(
2775 Elt: getStringLiteral(Str: ArrayMethod->getSelector().getAsString()));
2776 CallExpr *SelExp = SynthesizeCallToFunctionDecl(FD: SelGetUidFunctionDecl,
2777 Args: SelExprs, StartLoc, EndLoc);
2778 MsgExprs.push_back(Elt: SelExp);
2779
2780 // (const id [])objects
2781 MsgExprs.push_back(Elt: ArrayLiteralObjects);
2782
2783 // (NSUInteger)cnt
2784 Expr *cnt = IntegerLiteral::Create(C: *Context,
2785 V: llvm::APInt(UnsignedIntSize, NumElements),
2786 type: Context->UnsignedIntTy, l: SourceLocation());
2787 MsgExprs.push_back(Elt: cnt);
2788
2789 SmallVector<QualType, 4> ArgTypes;
2790 ArgTypes.push_back(Elt: Context->getObjCClassType());
2791 ArgTypes.push_back(Elt: Context->getObjCSelType());
2792 for (const auto *PI : ArrayMethod->parameters())
2793 ArgTypes.push_back(Elt: PI->getType());
2794
2795 QualType returnType = Exp->getType();
2796 // Get the type, we will need to reference it in a couple spots.
2797 QualType msgSendType = MsgSendFlavor->getType();
2798
2799 // Create a reference to the objc_msgSend() declaration.
2800 DeclRefExpr *DRE = new (Context) DeclRefExpr(
2801 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2802
2803 CastExpr *cast = NoTypeInfoCStyleCastExpr(
2804 Ctx: Context, Ty: Context->getPointerType(T: Context->VoidTy), Kind: CK_BitCast, E: DRE);
2805
2806 // Now do the "normal" pointer to function cast.
2807 QualType castType =
2808 getSimpleFunctionType(result: returnType, args: ArgTypes, variadic: ArrayMethod->isVariadic());
2809 castType = Context->getPointerType(T: castType);
2810 cast = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: castType, Kind: CK_BitCast,
2811 E: cast);
2812
2813 // Don't forget the parens to enforce the proper binding.
2814 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2815
2816 const FunctionType *FT = msgSendType->castAs<FunctionType>();
2817 CallExpr *CE = CallExpr::Create(Ctx: *Context, Fn: PE, Args: MsgExprs, Ty: FT->getReturnType(),
2818 VK: VK_PRValue, RParenLoc: EndLoc, FPFeatures: FPOptionsOverride());
2819 ReplaceStmt(Old: Exp, New: CE);
2820 return CE;
2821}
2822
2823Stmt *RewriteModernObjC::RewriteObjCDictionaryLiteralExpr(ObjCDictionaryLiteral *Exp) {
2824 // synthesize declaration of helper functions needed in this routine.
2825 if (!SelGetUidFunctionDecl)
2826 SynthSelGetUidFunctionDecl();
2827 // use objc_msgSend() for all.
2828 if (!MsgSendFunctionDecl)
2829 SynthMsgSendFunctionDecl();
2830 if (!GetClassFunctionDecl)
2831 SynthGetClassFunctionDecl();
2832
2833 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2834 SourceLocation StartLoc = Exp->getBeginLoc();
2835 SourceLocation EndLoc = Exp->getEndLoc();
2836
2837 // Build the expression: __NSContainer_literal(int, ...).arr
2838 QualType IntQT = Context->IntTy;
2839 QualType NSDictFType =
2840 getSimpleFunctionType(result: Context->VoidTy, args: IntQT, variadic: true);
2841 std::string NSDictFName("__NSContainer_literal");
2842 FunctionDecl *NSDictFD = SynthBlockInitFunctionDecl(name: NSDictFName);
2843 DeclRefExpr *NSDictDRE = new (Context) DeclRefExpr(
2844 *Context, NSDictFD, false, NSDictFType, VK_PRValue, SourceLocation());
2845
2846 SmallVector<Expr*, 16> KeyExprs;
2847 SmallVector<Expr*, 16> ValueExprs;
2848
2849 unsigned NumElements = Exp->getNumElements();
2850 unsigned UnsignedIntSize =
2851 static_cast<unsigned>(Context->getTypeSize(T: Context->UnsignedIntTy));
2852 Expr *count = IntegerLiteral::Create(C: *Context,
2853 V: llvm::APInt(UnsignedIntSize, NumElements),
2854 type: Context->UnsignedIntTy, l: SourceLocation());
2855 KeyExprs.push_back(Elt: count);
2856 ValueExprs.push_back(Elt: count);
2857 for (unsigned i = 0; i < NumElements; i++) {
2858 ObjCDictionaryElement Element = Exp->getKeyValueElement(Index: i);
2859 KeyExprs.push_back(Elt: Element.Key);
2860 ValueExprs.push_back(Elt: Element.Value);
2861 }
2862
2863 // (const id [])objects
2864 Expr *NSValueCallExpr =
2865 CallExpr::Create(Ctx: *Context, Fn: NSDictDRE, Args: ValueExprs, Ty: NSDictFType, VK: VK_LValue,
2866 RParenLoc: SourceLocation(), FPFeatures: FPOptionsOverride());
2867
2868 FieldDecl *ARRFD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(),
2869 IdLoc: SourceLocation(),
2870 Id: &Context->Idents.get(Name: "arr"),
2871 T: Context->getPointerType(T: Context->VoidPtrTy),
2872 TInfo: nullptr, /*BitWidth=*/BW: nullptr,
2873 /*Mutable=*/true, InitStyle: ICIS_NoInit);
2874 MemberExpr *DictLiteralValueME =
2875 MemberExpr::CreateImplicit(C: *Context, Base: NSValueCallExpr, IsArrow: false, MemberDecl: ARRFD,
2876 T: ARRFD->getType(), VK: VK_LValue, OK: OK_Ordinary);
2877 QualType ConstIdT = Context->getObjCIdType().withConst();
2878 CStyleCastExpr * DictValueObjects =
2879 NoTypeInfoCStyleCastExpr(Ctx: Context,
2880 Ty: Context->getPointerType(T: ConstIdT),
2881 Kind: CK_BitCast,
2882 E: DictLiteralValueME);
2883 // (const id <NSCopying> [])keys
2884 Expr *NSKeyCallExpr =
2885 CallExpr::Create(Ctx: *Context, Fn: NSDictDRE, Args: KeyExprs, Ty: NSDictFType, VK: VK_LValue,
2886 RParenLoc: SourceLocation(), FPFeatures: FPOptionsOverride());
2887
2888 MemberExpr *DictLiteralKeyME =
2889 MemberExpr::CreateImplicit(C: *Context, Base: NSKeyCallExpr, IsArrow: false, MemberDecl: ARRFD,
2890 T: ARRFD->getType(), VK: VK_LValue, OK: OK_Ordinary);
2891
2892 CStyleCastExpr * DictKeyObjects =
2893 NoTypeInfoCStyleCastExpr(Ctx: Context,
2894 Ty: Context->getPointerType(T: ConstIdT),
2895 Kind: CK_BitCast,
2896 E: DictLiteralKeyME);
2897
2898 // Synthesize a call to objc_msgSend().
2899 SmallVector<Expr*, 32> MsgExprs;
2900 SmallVector<Expr*, 4> ClsExprs;
2901 QualType expType = Exp->getType();
2902
2903 // Create a call to objc_getClass("NSArray"). It will be th 1st argument.
2904 ObjCInterfaceDecl *Class =
2905 expType->getPointeeType()->castAs<ObjCObjectType>()->getInterface();
2906
2907 IdentifierInfo *clsName = Class->getIdentifier();
2908 ClsExprs.push_back(Elt: getStringLiteral(Str: clsName->getName()));
2909 CallExpr *Cls = SynthesizeCallToFunctionDecl(FD: GetClassFunctionDecl, Args: ClsExprs,
2910 StartLoc, EndLoc);
2911 MsgExprs.push_back(Elt: Cls);
2912
2913 // Create a call to sel_registerName("arrayWithObjects:count:").
2914 // it will be the 2nd argument.
2915 SmallVector<Expr*, 4> SelExprs;
2916 ObjCMethodDecl *DictMethod = Exp->getDictWithObjectsMethod();
2917 SelExprs.push_back(Elt: getStringLiteral(Str: DictMethod->getSelector().getAsString()));
2918 CallExpr *SelExp = SynthesizeCallToFunctionDecl(FD: SelGetUidFunctionDecl,
2919 Args: SelExprs, StartLoc, EndLoc);
2920 MsgExprs.push_back(Elt: SelExp);
2921
2922 // (const id [])objects
2923 MsgExprs.push_back(Elt: DictValueObjects);
2924
2925 // (const id <NSCopying> [])keys
2926 MsgExprs.push_back(Elt: DictKeyObjects);
2927
2928 // (NSUInteger)cnt
2929 Expr *cnt = IntegerLiteral::Create(C: *Context,
2930 V: llvm::APInt(UnsignedIntSize, NumElements),
2931 type: Context->UnsignedIntTy, l: SourceLocation());
2932 MsgExprs.push_back(Elt: cnt);
2933
2934 SmallVector<QualType, 8> ArgTypes;
2935 ArgTypes.push_back(Elt: Context->getObjCClassType());
2936 ArgTypes.push_back(Elt: Context->getObjCSelType());
2937 for (const auto *PI : DictMethod->parameters()) {
2938 QualType T = PI->getType();
2939 if (const PointerType* PT = T->getAs<PointerType>()) {
2940 QualType PointeeTy = PT->getPointeeType();
2941 convertToUnqualifiedObjCType(T&: PointeeTy);
2942 T = Context->getPointerType(T: PointeeTy);
2943 }
2944 ArgTypes.push_back(Elt: T);
2945 }
2946
2947 QualType returnType = Exp->getType();
2948 // Get the type, we will need to reference it in a couple spots.
2949 QualType msgSendType = MsgSendFlavor->getType();
2950
2951 // Create a reference to the objc_msgSend() declaration.
2952 DeclRefExpr *DRE = new (Context) DeclRefExpr(
2953 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2954
2955 CastExpr *cast = NoTypeInfoCStyleCastExpr(
2956 Ctx: Context, Ty: Context->getPointerType(T: Context->VoidTy), Kind: CK_BitCast, E: DRE);
2957
2958 // Now do the "normal" pointer to function cast.
2959 QualType castType =
2960 getSimpleFunctionType(result: returnType, args: ArgTypes, variadic: DictMethod->isVariadic());
2961 castType = Context->getPointerType(T: castType);
2962 cast = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: castType, Kind: CK_BitCast,
2963 E: cast);
2964
2965 // Don't forget the parens to enforce the proper binding.
2966 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2967
2968 const FunctionType *FT = msgSendType->castAs<FunctionType>();
2969 CallExpr *CE = CallExpr::Create(Ctx: *Context, Fn: PE, Args: MsgExprs, Ty: FT->getReturnType(),
2970 VK: VK_PRValue, RParenLoc: EndLoc, FPFeatures: FPOptionsOverride());
2971 ReplaceStmt(Old: Exp, New: CE);
2972 return CE;
2973}
2974
2975// struct __rw_objc_super {
2976// struct objc_object *object; struct objc_object *superClass;
2977// };
2978QualType RewriteModernObjC::getSuperStructType() {
2979 if (!SuperStructDecl) {
2980 SuperStructDecl = RecordDecl::Create(
2981 C: *Context, TK: TagTypeKind::Struct, DC: TUDecl, StartLoc: SourceLocation(),
2982 IdLoc: SourceLocation(), Id: &Context->Idents.get(Name: "__rw_objc_super"));
2983 QualType FieldTypes[2];
2984
2985 // struct objc_object *object;
2986 FieldTypes[0] = Context->getObjCIdType();
2987 // struct objc_object *superClass;
2988 FieldTypes[1] = Context->getObjCIdType();
2989
2990 // Create fields
2991 for (unsigned i = 0; i < 2; ++i) {
2992 SuperStructDecl->addDecl(D: FieldDecl::Create(C: *Context, DC: SuperStructDecl,
2993 StartLoc: SourceLocation(),
2994 IdLoc: SourceLocation(), Id: nullptr,
2995 T: FieldTypes[i], TInfo: nullptr,
2996 /*BitWidth=*/BW: nullptr,
2997 /*Mutable=*/false,
2998 InitStyle: ICIS_NoInit));
2999 }
3000
3001 SuperStructDecl->completeDefinition();
3002 }
3003 return Context->getTagDeclType(Decl: SuperStructDecl);
3004}
3005
3006QualType RewriteModernObjC::getConstantStringStructType() {
3007 if (!ConstantStringDecl) {
3008 ConstantStringDecl = RecordDecl::Create(
3009 C: *Context, TK: TagTypeKind::Struct, DC: TUDecl, StartLoc: SourceLocation(),
3010 IdLoc: SourceLocation(), Id: &Context->Idents.get(Name: "__NSConstantStringImpl"));
3011 QualType FieldTypes[4];
3012
3013 // struct objc_object *receiver;
3014 FieldTypes[0] = Context->getObjCIdType();
3015 // int flags;
3016 FieldTypes[1] = Context->IntTy;
3017 // char *str;
3018 FieldTypes[2] = Context->getPointerType(T: Context->CharTy);
3019 // long length;
3020 FieldTypes[3] = Context->LongTy;
3021
3022 // Create fields
3023 for (unsigned i = 0; i < 4; ++i) {
3024 ConstantStringDecl->addDecl(D: FieldDecl::Create(C: *Context,
3025 DC: ConstantStringDecl,
3026 StartLoc: SourceLocation(),
3027 IdLoc: SourceLocation(), Id: nullptr,
3028 T: FieldTypes[i], TInfo: nullptr,
3029 /*BitWidth=*/BW: nullptr,
3030 /*Mutable=*/true,
3031 InitStyle: ICIS_NoInit));
3032 }
3033
3034 ConstantStringDecl->completeDefinition();
3035 }
3036 return Context->getTagDeclType(Decl: ConstantStringDecl);
3037}
3038
3039/// getFunctionSourceLocation - returns start location of a function
3040/// definition. Complication arises when function has declared as
3041/// extern "C" or extern "C" {...}
3042static SourceLocation getFunctionSourceLocation (RewriteModernObjC &R,
3043 FunctionDecl *FD) {
3044 if (FD->isExternC() && !FD->isMain()) {
3045 const DeclContext *DC = FD->getDeclContext();
3046 if (const LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(Val: DC))
3047 // if it is extern "C" {...}, return function decl's own location.
3048 if (!LSD->getRBraceLoc().isValid())
3049 return LSD->getExternLoc();
3050 }
3051 if (FD->getStorageClass() != SC_None)
3052 R.RewriteBlockLiteralFunctionDecl(FD);
3053 return FD->getTypeSpecStartLoc();
3054}
3055
3056void RewriteModernObjC::RewriteLineDirective(const Decl *D) {
3057
3058 SourceLocation Location = D->getLocation();
3059
3060 if (Location.isFileID() && GenerateLineInfo) {
3061 std::string LineString("\n#line ");
3062 PresumedLoc PLoc = SM->getPresumedLoc(Loc: Location);
3063 LineString += utostr(X: PLoc.getLine());
3064 LineString += " \"";
3065 LineString += Lexer::Stringify(Str: PLoc.getFilename());
3066 if (isa<ObjCMethodDecl>(Val: D))
3067 LineString += "\"";
3068 else LineString += "\"\n";
3069
3070 Location = D->getBeginLoc();
3071 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Val: D)) {
3072 if (FD->isExternC() && !FD->isMain()) {
3073 const DeclContext *DC = FD->getDeclContext();
3074 if (const LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(Val: DC))
3075 // if it is extern "C" {...}, return function decl's own location.
3076 if (!LSD->getRBraceLoc().isValid())
3077 Location = LSD->getExternLoc();
3078 }
3079 }
3080 InsertText(Loc: Location, Str: LineString);
3081 }
3082}
3083
3084/// SynthMsgSendStretCallExpr - This routine translates message expression
3085/// into a call to objc_msgSend_stret() entry point. Tricky part is that
3086/// nil check on receiver must be performed before calling objc_msgSend_stret.
3087/// MsgSendStretFlavor - function declaration objc_msgSend_stret(...)
3088/// msgSendType - function type of objc_msgSend_stret(...)
3089/// returnType - Result type of the method being synthesized.
3090/// ArgTypes - type of the arguments passed to objc_msgSend_stret, starting with receiver type.
3091/// MsgExprs - list of argument expressions being passed to objc_msgSend_stret,
3092/// starting with receiver.
3093/// Method - Method being rewritten.
3094Expr *RewriteModernObjC::SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
3095 QualType returnType,
3096 SmallVectorImpl<QualType> &ArgTypes,
3097 SmallVectorImpl<Expr*> &MsgExprs,
3098 ObjCMethodDecl *Method) {
3099 // Now do the "normal" pointer to function cast.
3100 QualType FuncType = getSimpleFunctionType(
3101 result: returnType, args: ArgTypes, variadic: Method ? Method->isVariadic() : false);
3102 QualType castType = Context->getPointerType(T: FuncType);
3103
3104 // build type for containing the objc_msgSend_stret object.
3105 static unsigned stretCount=0;
3106 std::string name = "__Stret"; name += utostr(X: stretCount);
3107 std::string str =
3108 "extern \"C\" void * __cdecl memset(void *_Dst, int _Val, size_t _Size);\n";
3109 str += "namespace {\n";
3110 str += "struct "; str += name;
3111 str += " {\n\t";
3112 str += name;
3113 str += "(id receiver, SEL sel";
3114 for (unsigned i = 2; i < ArgTypes.size(); i++) {
3115 std::string ArgName = "arg"; ArgName += utostr(X: i);
3116 ArgTypes[i].getAsStringInternal(Str&: ArgName, Policy: Context->getPrintingPolicy());
3117 str += ", "; str += ArgName;
3118 }
3119 // could be vararg.
3120 for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); i++) {
3121 std::string ArgName = "arg"; ArgName += utostr(X: i);
3122 MsgExprs[i]->getType().getAsStringInternal(Str&: ArgName,
3123 Policy: Context->getPrintingPolicy());
3124 str += ", "; str += ArgName;
3125 }
3126
3127 str += ") {\n";
3128 str += "\t unsigned size = sizeof(";
3129 str += returnType.getAsString(Policy: Context->getPrintingPolicy()); str += ");\n";
3130
3131 str += "\t if (size == 1 || size == 2 || size == 4 || size == 8)\n";
3132
3133 str += "\t s = (("; str += castType.getAsString(Policy: Context->getPrintingPolicy());
3134 str += ")(void *)objc_msgSend)(receiver, sel";
3135 for (unsigned i = 2; i < ArgTypes.size(); i++) {
3136 str += ", arg"; str += utostr(X: i);
3137 }
3138 // could be vararg.
3139 for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); i++) {
3140 str += ", arg"; str += utostr(X: i);
3141 }
3142 str+= ");\n";
3143
3144 str += "\t else if (receiver == 0)\n";
3145 str += "\t memset((void*)&s, 0, sizeof(s));\n";
3146 str += "\t else\n";
3147
3148 str += "\t s = (("; str += castType.getAsString(Policy: Context->getPrintingPolicy());
3149 str += ")(void *)objc_msgSend_stret)(receiver, sel";
3150 for (unsigned i = 2; i < ArgTypes.size(); i++) {
3151 str += ", arg"; str += utostr(X: i);
3152 }
3153 // could be vararg.
3154 for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); i++) {
3155 str += ", arg"; str += utostr(X: i);
3156 }
3157 str += ");\n";
3158
3159 str += "\t}\n";
3160 str += "\t"; str += returnType.getAsString(Policy: Context->getPrintingPolicy());
3161 str += " s;\n";
3162 str += "};\n};\n\n";
3163 SourceLocation FunLocStart;
3164 if (CurFunctionDef)
3165 FunLocStart = getFunctionSourceLocation(R&: *this, FD: CurFunctionDef);
3166 else {
3167 assert(CurMethodDef && "SynthMsgSendStretCallExpr - CurMethodDef is null");
3168 FunLocStart = CurMethodDef->getBeginLoc();
3169 }
3170
3171 InsertText(Loc: FunLocStart, Str: str);
3172 ++stretCount;
3173
3174 // AST for __Stretn(receiver, args).s;
3175 IdentifierInfo *ID = &Context->Idents.get(Name: name);
3176 FunctionDecl *FD =
3177 FunctionDecl::Create(C&: *Context, DC: TUDecl, StartLoc: SourceLocation(), NLoc: SourceLocation(),
3178 N: ID, T: FuncType, TInfo: nullptr, SC: SC_Extern, UsesFPIntrin: false, isInlineSpecified: false);
3179 DeclRefExpr *DRE = new (Context)
3180 DeclRefExpr(*Context, FD, false, castType, VK_PRValue, SourceLocation());
3181 CallExpr *STCE =
3182 CallExpr::Create(Ctx: *Context, Fn: DRE, Args: MsgExprs, Ty: castType, VK: VK_LValue,
3183 RParenLoc: SourceLocation(), FPFeatures: FPOptionsOverride());
3184
3185 FieldDecl *FieldD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(),
3186 IdLoc: SourceLocation(),
3187 Id: &Context->Idents.get(Name: "s"),
3188 T: returnType, TInfo: nullptr,
3189 /*BitWidth=*/BW: nullptr,
3190 /*Mutable=*/true, InitStyle: ICIS_NoInit);
3191 MemberExpr *ME = MemberExpr::CreateImplicit(
3192 C: *Context, Base: STCE, IsArrow: false, MemberDecl: FieldD, T: FieldD->getType(), VK: VK_LValue, OK: OK_Ordinary);
3193
3194 return ME;
3195}
3196
3197Stmt *RewriteModernObjC::SynthMessageExpr(ObjCMessageExpr *Exp,
3198 SourceLocation StartLoc,
3199 SourceLocation EndLoc) {
3200 if (!SelGetUidFunctionDecl)
3201 SynthSelGetUidFunctionDecl();
3202 if (!MsgSendFunctionDecl)
3203 SynthMsgSendFunctionDecl();
3204 if (!MsgSendSuperFunctionDecl)
3205 SynthMsgSendSuperFunctionDecl();
3206 if (!MsgSendStretFunctionDecl)
3207 SynthMsgSendStretFunctionDecl();
3208 if (!MsgSendSuperStretFunctionDecl)
3209 SynthMsgSendSuperStretFunctionDecl();
3210 if (!MsgSendFpretFunctionDecl)
3211 SynthMsgSendFpretFunctionDecl();
3212 if (!GetClassFunctionDecl)
3213 SynthGetClassFunctionDecl();
3214 if (!GetSuperClassFunctionDecl)
3215 SynthGetSuperClassFunctionDecl();
3216 if (!GetMetaClassFunctionDecl)
3217 SynthGetMetaClassFunctionDecl();
3218
3219 // default to objc_msgSend().
3220 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
3221 // May need to use objc_msgSend_stret() as well.
3222 FunctionDecl *MsgSendStretFlavor = nullptr;
3223 if (ObjCMethodDecl *mDecl = Exp->getMethodDecl()) {
3224 QualType resultType = mDecl->getReturnType();
3225 if (resultType->isRecordType())
3226 MsgSendStretFlavor = MsgSendStretFunctionDecl;
3227 else if (resultType->isRealFloatingType())
3228 MsgSendFlavor = MsgSendFpretFunctionDecl;
3229 }
3230
3231 // Synthesize a call to objc_msgSend().
3232 SmallVector<Expr*, 8> MsgExprs;
3233 switch (Exp->getReceiverKind()) {
3234 case ObjCMessageExpr::SuperClass: {
3235 MsgSendFlavor = MsgSendSuperFunctionDecl;
3236 if (MsgSendStretFlavor)
3237 MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
3238 assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
3239
3240 ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
3241
3242 SmallVector<Expr*, 4> InitExprs;
3243
3244 // set the receiver to self, the first argument to all methods.
3245 InitExprs.push_back(Elt: NoTypeInfoCStyleCastExpr(
3246 Ctx: Context, Ty: Context->getObjCIdType(), Kind: CK_BitCast,
3247 E: new (Context) DeclRefExpr(*Context, CurMethodDef->getSelfDecl(), false,
3248 Context->getObjCIdType(), VK_PRValue,
3249 SourceLocation()))); // set the 'receiver'.
3250
3251 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3252 SmallVector<Expr*, 8> ClsExprs;
3253 ClsExprs.push_back(Elt: getStringLiteral(Str: ClassDecl->getIdentifier()->getName()));
3254 // (Class)objc_getClass("CurrentClass")
3255 CallExpr *Cls = SynthesizeCallToFunctionDecl(FD: GetMetaClassFunctionDecl,
3256 Args: ClsExprs, StartLoc, EndLoc);
3257 ClsExprs.clear();
3258 ClsExprs.push_back(Elt: Cls);
3259 Cls = SynthesizeCallToFunctionDecl(FD: GetSuperClassFunctionDecl, Args: ClsExprs,
3260 StartLoc, EndLoc);
3261
3262 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3263 // To turn off a warning, type-cast to 'id'
3264 InitExprs.push_back( // set 'super class', using class_getSuperclass().
3265 Elt: NoTypeInfoCStyleCastExpr(Ctx: Context,
3266 Ty: Context->getObjCIdType(),
3267 Kind: CK_BitCast, E: Cls));
3268 // struct __rw_objc_super
3269 QualType superType = getSuperStructType();
3270 Expr *SuperRep;
3271
3272 if (LangOpts.MicrosoftExt) {
3273 SynthSuperConstructorFunctionDecl();
3274 // Simulate a constructor call...
3275 DeclRefExpr *DRE = new (Context)
3276 DeclRefExpr(*Context, SuperConstructorFunctionDecl, false, superType,
3277 VK_LValue, SourceLocation());
3278 SuperRep =
3279 CallExpr::Create(Ctx: *Context, Fn: DRE, Args: InitExprs, Ty: superType, VK: VK_LValue,
3280 RParenLoc: SourceLocation(), FPFeatures: FPOptionsOverride());
3281 // The code for super is a little tricky to prevent collision with
3282 // the structure definition in the header. The rewriter has it's own
3283 // internal definition (__rw_objc_super) that is uses. This is why
3284 // we need the cast below. For example:
3285 // (struct __rw_objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
3286 //
3287 SuperRep = UnaryOperator::Create(
3288 C: const_cast<ASTContext &>(*Context), input: SuperRep, opc: UO_AddrOf,
3289 type: Context->getPointerType(T: SuperRep->getType()), VK: VK_PRValue, OK: OK_Ordinary,
3290 l: SourceLocation(), CanOverflow: false, FPFeatures: FPOptionsOverride());
3291 SuperRep = NoTypeInfoCStyleCastExpr(Ctx: Context,
3292 Ty: Context->getPointerType(T: superType),
3293 Kind: CK_BitCast, E: SuperRep);
3294 } else {
3295 // (struct __rw_objc_super) { <exprs from above> }
3296 InitListExpr *ILE =
3297 new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
3298 SourceLocation());
3299 TypeSourceInfo *superTInfo
3300 = Context->getTrivialTypeSourceInfo(T: superType);
3301 SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
3302 superType, VK_LValue,
3303 ILE, false);
3304 // struct __rw_objc_super *
3305 SuperRep = UnaryOperator::Create(
3306 C: const_cast<ASTContext &>(*Context), input: SuperRep, opc: UO_AddrOf,
3307 type: Context->getPointerType(T: SuperRep->getType()), VK: VK_PRValue, OK: OK_Ordinary,
3308 l: SourceLocation(), CanOverflow: false, FPFeatures: FPOptionsOverride());
3309 }
3310 MsgExprs.push_back(Elt: SuperRep);
3311 break;
3312 }
3313
3314 case ObjCMessageExpr::Class: {
3315 SmallVector<Expr*, 8> ClsExprs;
3316 ObjCInterfaceDecl *Class
3317 = Exp->getClassReceiver()->castAs<ObjCObjectType>()->getInterface();
3318 IdentifierInfo *clsName = Class->getIdentifier();
3319 ClsExprs.push_back(Elt: getStringLiteral(Str: clsName->getName()));
3320 CallExpr *Cls = SynthesizeCallToFunctionDecl(FD: GetClassFunctionDecl, Args: ClsExprs,
3321 StartLoc, EndLoc);
3322 CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Ctx: Context,
3323 Ty: Context->getObjCIdType(),
3324 Kind: CK_BitCast, E: Cls);
3325 MsgExprs.push_back(Elt: ArgExpr);
3326 break;
3327 }
3328
3329 case ObjCMessageExpr::SuperInstance:{
3330 MsgSendFlavor = MsgSendSuperFunctionDecl;
3331 if (MsgSendStretFlavor)
3332 MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
3333 assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
3334 ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
3335 SmallVector<Expr*, 4> InitExprs;
3336
3337 InitExprs.push_back(Elt: NoTypeInfoCStyleCastExpr(
3338 Ctx: Context, Ty: Context->getObjCIdType(), Kind: CK_BitCast,
3339 E: new (Context) DeclRefExpr(*Context, CurMethodDef->getSelfDecl(), false,
3340 Context->getObjCIdType(), VK_PRValue,
3341 SourceLocation()))); // set the 'receiver'.
3342
3343 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3344 SmallVector<Expr*, 8> ClsExprs;
3345 ClsExprs.push_back(Elt: getStringLiteral(Str: ClassDecl->getIdentifier()->getName()));
3346 // (Class)objc_getClass("CurrentClass")
3347 CallExpr *Cls = SynthesizeCallToFunctionDecl(FD: GetClassFunctionDecl, Args: ClsExprs,
3348 StartLoc, EndLoc);
3349 ClsExprs.clear();
3350 ClsExprs.push_back(Elt: Cls);
3351 Cls = SynthesizeCallToFunctionDecl(FD: GetSuperClassFunctionDecl, Args: ClsExprs,
3352 StartLoc, EndLoc);
3353
3354 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3355 // To turn off a warning, type-cast to 'id'
3356 InitExprs.push_back(
3357 // set 'super class', using class_getSuperclass().
3358 Elt: NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: Context->getObjCIdType(),
3359 Kind: CK_BitCast, E: Cls));
3360 // struct __rw_objc_super
3361 QualType superType = getSuperStructType();
3362 Expr *SuperRep;
3363
3364 if (LangOpts.MicrosoftExt) {
3365 SynthSuperConstructorFunctionDecl();
3366 // Simulate a constructor call...
3367 DeclRefExpr *DRE = new (Context)
3368 DeclRefExpr(*Context, SuperConstructorFunctionDecl, false, superType,
3369 VK_LValue, SourceLocation());
3370 SuperRep =
3371 CallExpr::Create(Ctx: *Context, Fn: DRE, Args: InitExprs, Ty: superType, VK: VK_LValue,
3372 RParenLoc: SourceLocation(), FPFeatures: FPOptionsOverride());
3373 // The code for super is a little tricky to prevent collision with
3374 // the structure definition in the header. The rewriter has it's own
3375 // internal definition (__rw_objc_super) that is uses. This is why
3376 // we need the cast below. For example:
3377 // (struct __rw_objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
3378 //
3379 SuperRep = UnaryOperator::Create(
3380 C: const_cast<ASTContext &>(*Context), input: SuperRep, opc: UO_AddrOf,
3381 type: Context->getPointerType(T: SuperRep->getType()), VK: VK_PRValue, OK: OK_Ordinary,
3382 l: SourceLocation(), CanOverflow: false, FPFeatures: FPOptionsOverride());
3383 SuperRep = NoTypeInfoCStyleCastExpr(Ctx: Context,
3384 Ty: Context->getPointerType(T: superType),
3385 Kind: CK_BitCast, E: SuperRep);
3386 } else {
3387 // (struct __rw_objc_super) { <exprs from above> }
3388 InitListExpr *ILE =
3389 new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
3390 SourceLocation());
3391 TypeSourceInfo *superTInfo
3392 = Context->getTrivialTypeSourceInfo(T: superType);
3393 SuperRep = new (Context) CompoundLiteralExpr(
3394 SourceLocation(), superTInfo, superType, VK_PRValue, ILE, false);
3395 }
3396 MsgExprs.push_back(Elt: SuperRep);
3397 break;
3398 }
3399
3400 case ObjCMessageExpr::Instance: {
3401 // Remove all type-casts because it may contain objc-style types; e.g.
3402 // Foo<Proto> *.
3403 Expr *recExpr = Exp->getInstanceReceiver();
3404 while (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(Val: recExpr))
3405 recExpr = CE->getSubExpr();
3406 CastKind CK = recExpr->getType()->isObjCObjectPointerType()
3407 ? CK_BitCast : recExpr->getType()->isBlockPointerType()
3408 ? CK_BlockPointerToObjCPointerCast
3409 : CK_CPointerToObjCPointerCast;
3410
3411 recExpr = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: Context->getObjCIdType(),
3412 Kind: CK, E: recExpr);
3413 MsgExprs.push_back(Elt: recExpr);
3414 break;
3415 }
3416 }
3417
3418 // Create a call to sel_registerName("selName"), it will be the 2nd argument.
3419 SmallVector<Expr*, 8> SelExprs;
3420 SelExprs.push_back(Elt: getStringLiteral(Str: Exp->getSelector().getAsString()));
3421 CallExpr *SelExp = SynthesizeCallToFunctionDecl(FD: SelGetUidFunctionDecl,
3422 Args: SelExprs, StartLoc, EndLoc);
3423 MsgExprs.push_back(Elt: SelExp);
3424
3425 // Now push any user supplied arguments.
3426 for (unsigned i = 0; i < Exp->getNumArgs(); i++) {
3427 Expr *userExpr = Exp->getArg(Arg: i);
3428 // Make all implicit casts explicit...ICE comes in handy:-)
3429 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(Val: userExpr)) {
3430 // Reuse the ICE type, it is exactly what the doctor ordered.
3431 QualType type = ICE->getType();
3432 if (needToScanForQualifiers(T: type))
3433 type = Context->getObjCIdType();
3434 // Make sure we convert "type (^)(...)" to "type (*)(...)".
3435 (void)convertBlockPointerToFunctionPointer(T&: type);
3436 const Expr *SubExpr = ICE->IgnoreParenImpCasts();
3437 CastKind CK;
3438 if (SubExpr->getType()->isIntegralType(Ctx: *Context) &&
3439 type->isBooleanType()) {
3440 CK = CK_IntegralToBoolean;
3441 } else if (type->isObjCObjectPointerType()) {
3442 if (SubExpr->getType()->isBlockPointerType()) {
3443 CK = CK_BlockPointerToObjCPointerCast;
3444 } else if (SubExpr->getType()->isPointerType()) {
3445 CK = CK_CPointerToObjCPointerCast;
3446 } else {
3447 CK = CK_BitCast;
3448 }
3449 } else {
3450 CK = CK_BitCast;
3451 }
3452
3453 userExpr = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: type, Kind: CK, E: userExpr);
3454 }
3455 // Make id<P...> cast into an 'id' cast.
3456 else if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(Val: userExpr)) {
3457 if (CE->getType()->isObjCQualifiedIdType()) {
3458 while ((CE = dyn_cast<CStyleCastExpr>(Val: userExpr)))
3459 userExpr = CE->getSubExpr();
3460 CastKind CK;
3461 if (userExpr->getType()->isIntegralType(Ctx: *Context)) {
3462 CK = CK_IntegralToPointer;
3463 } else if (userExpr->getType()->isBlockPointerType()) {
3464 CK = CK_BlockPointerToObjCPointerCast;
3465 } else if (userExpr->getType()->isPointerType()) {
3466 CK = CK_CPointerToObjCPointerCast;
3467 } else {
3468 CK = CK_BitCast;
3469 }
3470 userExpr = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: Context->getObjCIdType(),
3471 Kind: CK, E: userExpr);
3472 }
3473 }
3474 MsgExprs.push_back(Elt: userExpr);
3475 // We've transferred the ownership to MsgExprs. For now, we *don't* null
3476 // out the argument in the original expression (since we aren't deleting
3477 // the ObjCMessageExpr). See RewritePropertyOrImplicitSetter() usage for more info.
3478 //Exp->setArg(i, 0);
3479 }
3480 // Generate the funky cast.
3481 CastExpr *cast;
3482 SmallVector<QualType, 8> ArgTypes;
3483 QualType returnType;
3484
3485 // Push 'id' and 'SEL', the 2 implicit arguments.
3486 if (MsgSendFlavor == MsgSendSuperFunctionDecl)
3487 ArgTypes.push_back(Elt: Context->getPointerType(T: getSuperStructType()));
3488 else
3489 ArgTypes.push_back(Elt: Context->getObjCIdType());
3490 ArgTypes.push_back(Elt: Context->getObjCSelType());
3491 if (ObjCMethodDecl *OMD = Exp->getMethodDecl()) {
3492 // Push any user argument types.
3493 for (const auto *PI : OMD->parameters()) {
3494 QualType t = PI->getType()->isObjCQualifiedIdType()
3495 ? Context->getObjCIdType()
3496 : PI->getType();
3497 // Make sure we convert "t (^)(...)" to "t (*)(...)".
3498 (void)convertBlockPointerToFunctionPointer(T&: t);
3499 ArgTypes.push_back(Elt: t);
3500 }
3501 returnType = Exp->getType();
3502 convertToUnqualifiedObjCType(T&: returnType);
3503 (void)convertBlockPointerToFunctionPointer(T&: returnType);
3504 } else {
3505 returnType = Context->getObjCIdType();
3506 }
3507 // Get the type, we will need to reference it in a couple spots.
3508 QualType msgSendType = MsgSendFlavor->getType();
3509
3510 // Create a reference to the objc_msgSend() declaration.
3511 DeclRefExpr *DRE = new (Context) DeclRefExpr(
3512 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
3513
3514 // Need to cast objc_msgSend to "void *" (to workaround a GCC bandaid).
3515 // If we don't do this cast, we get the following bizarre warning/note:
3516 // xx.m:13: warning: function called through a non-compatible type
3517 // xx.m:13: note: if this code is reached, the program will abort
3518 cast = NoTypeInfoCStyleCastExpr(Ctx: Context,
3519 Ty: Context->getPointerType(T: Context->VoidTy),
3520 Kind: CK_BitCast, E: DRE);
3521
3522 // Now do the "normal" pointer to function cast.
3523 // If we don't have a method decl, force a variadic cast.
3524 const ObjCMethodDecl *MD = Exp->getMethodDecl();
3525 QualType castType =
3526 getSimpleFunctionType(result: returnType, args: ArgTypes, variadic: MD ? MD->isVariadic() : true);
3527 castType = Context->getPointerType(T: castType);
3528 cast = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: castType, Kind: CK_BitCast,
3529 E: cast);
3530
3531 // Don't forget the parens to enforce the proper binding.
3532 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
3533
3534 const FunctionType *FT = msgSendType->castAs<FunctionType>();
3535 CallExpr *CE = CallExpr::Create(Ctx: *Context, Fn: PE, Args: MsgExprs, Ty: FT->getReturnType(),
3536 VK: VK_PRValue, RParenLoc: EndLoc, FPFeatures: FPOptionsOverride());
3537 Stmt *ReplacingStmt = CE;
3538 if (MsgSendStretFlavor) {
3539 // We have the method which returns a struct/union. Must also generate
3540 // call to objc_msgSend_stret and hang both varieties on a conditional
3541 // expression which dictate which one to envoke depending on size of
3542 // method's return type.
3543
3544 Expr *STCE = SynthMsgSendStretCallExpr(MsgSendStretFlavor,
3545 returnType,
3546 ArgTypes, MsgExprs,
3547 Method: Exp->getMethodDecl());
3548 ReplacingStmt = STCE;
3549 }
3550 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3551 return ReplacingStmt;
3552}
3553
3554Stmt *RewriteModernObjC::RewriteMessageExpr(ObjCMessageExpr *Exp) {
3555 Stmt *ReplacingStmt =
3556 SynthMessageExpr(Exp, StartLoc: Exp->getBeginLoc(), EndLoc: Exp->getEndLoc());
3557
3558 // Now do the actual rewrite.
3559 ReplaceStmt(Old: Exp, New: ReplacingStmt);
3560
3561 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3562 return ReplacingStmt;
3563}
3564
3565// typedef struct objc_object Protocol;
3566QualType RewriteModernObjC::getProtocolType() {
3567 if (!ProtocolTypeDecl) {
3568 TypeSourceInfo *TInfo
3569 = Context->getTrivialTypeSourceInfo(T: Context->getObjCIdType());
3570 ProtocolTypeDecl = TypedefDecl::Create(C&: *Context, DC: TUDecl,
3571 StartLoc: SourceLocation(), IdLoc: SourceLocation(),
3572 Id: &Context->Idents.get(Name: "Protocol"),
3573 TInfo);
3574 }
3575 return Context->getTypeDeclType(Decl: ProtocolTypeDecl);
3576}
3577
3578/// RewriteObjCProtocolExpr - Rewrite a protocol expression into
3579/// a synthesized/forward data reference (to the protocol's metadata).
3580/// The forward references (and metadata) are generated in
3581/// RewriteModernObjC::HandleTranslationUnit().
3582Stmt *RewriteModernObjC::RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp) {
3583 std::string Name = "_OBJC_PROTOCOL_REFERENCE_$_" +
3584 Exp->getProtocol()->getNameAsString();
3585 IdentifierInfo *ID = &Context->Idents.get(Name);
3586 VarDecl *VD = VarDecl::Create(C&: *Context, DC: TUDecl, StartLoc: SourceLocation(),
3587 IdLoc: SourceLocation(), Id: ID, T: getProtocolType(),
3588 TInfo: nullptr, S: SC_Extern);
3589 DeclRefExpr *DRE = new (Context) DeclRefExpr(
3590 *Context, VD, false, getProtocolType(), VK_LValue, SourceLocation());
3591 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(
3592 Ctx: Context, Ty: Context->getPointerType(T: DRE->getType()), Kind: CK_BitCast, E: DRE);
3593 ReplaceStmt(Old: Exp, New: castExpr);
3594 ProtocolExprDecls.insert(Ptr: Exp->getProtocol()->getCanonicalDecl());
3595 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3596 return castExpr;
3597}
3598
3599/// IsTagDefinedInsideClass - This routine checks that a named tagged type
3600/// is defined inside an objective-c class. If so, it returns true.
3601bool RewriteModernObjC::IsTagDefinedInsideClass(ObjCContainerDecl *IDecl,
3602 TagDecl *Tag,
3603 bool &IsNamedDefinition) {
3604 if (!IDecl)
3605 return false;
3606 SourceLocation TagLocation;
3607 if (RecordDecl *RD = dyn_cast<RecordDecl>(Val: Tag)) {
3608 RD = RD->getDefinition();
3609 if (!RD || !RD->getDeclName().getAsIdentifierInfo())
3610 return false;
3611 IsNamedDefinition = true;
3612 TagLocation = RD->getLocation();
3613 return Context->getSourceManager().isBeforeInTranslationUnit(
3614 LHS: IDecl->getLocation(), RHS: TagLocation);
3615 }
3616 if (EnumDecl *ED = dyn_cast<EnumDecl>(Val: Tag)) {
3617 if (!ED || !ED->getDeclName().getAsIdentifierInfo())
3618 return false;
3619 IsNamedDefinition = true;
3620 TagLocation = ED->getLocation();
3621 return Context->getSourceManager().isBeforeInTranslationUnit(
3622 LHS: IDecl->getLocation(), RHS: TagLocation);
3623 }
3624 return false;
3625}
3626
3627/// RewriteObjCFieldDeclType - This routine rewrites a type into the buffer.
3628/// It handles elaborated types, as well as enum types in the process.
3629bool RewriteModernObjC::RewriteObjCFieldDeclType(QualType &Type,
3630 std::string &Result) {
3631 if (Type->getAs<TypedefType>()) {
3632 Result += "\t";
3633 return false;
3634 }
3635
3636 if (Type->isArrayType()) {
3637 QualType ElemTy = Context->getBaseElementType(QT: Type);
3638 return RewriteObjCFieldDeclType(Type&: ElemTy, Result);
3639 }
3640 else if (Type->isRecordType()) {
3641 RecordDecl *RD = Type->castAs<RecordType>()->getDecl();
3642 if (RD->isCompleteDefinition()) {
3643 if (RD->isStruct())
3644 Result += "\n\tstruct ";
3645 else if (RD->isUnion())
3646 Result += "\n\tunion ";
3647 else
3648 assert(false && "class not allowed as an ivar type");
3649
3650 Result += RD->getName();
3651 if (GlobalDefinedTags.count(Ptr: RD)) {
3652 // struct/union is defined globally, use it.
3653 Result += " ";
3654 return true;
3655 }
3656 Result += " {\n";
3657 for (auto *FD : RD->fields())
3658 RewriteObjCFieldDecl(fieldDecl: FD, Result);
3659 Result += "\t} ";
3660 return true;
3661 }
3662 }
3663 else if (Type->isEnumeralType()) {
3664 EnumDecl *ED = Type->castAs<EnumType>()->getDecl();
3665 if (ED->isCompleteDefinition()) {
3666 Result += "\n\tenum ";
3667 Result += ED->getName();
3668 if (GlobalDefinedTags.count(Ptr: ED)) {
3669 // Enum is globall defined, use it.
3670 Result += " ";
3671 return true;
3672 }
3673
3674 Result += " {\n";
3675 for (const auto *EC : ED->enumerators()) {
3676 Result += "\t"; Result += EC->getName(); Result += " = ";
3677 Result += toString(I: EC->getInitVal(), Radix: 10);
3678 Result += ",\n";
3679 }
3680 Result += "\t} ";
3681 return true;
3682 }
3683 }
3684
3685 Result += "\t";
3686 convertObjCTypeToCStyleType(T&: Type);
3687 return false;
3688}
3689
3690
3691/// RewriteObjCFieldDecl - This routine rewrites a field into the buffer.
3692/// It handles elaborated types, as well as enum types in the process.
3693void RewriteModernObjC::RewriteObjCFieldDecl(FieldDecl *fieldDecl,
3694 std::string &Result) {
3695 QualType Type = fieldDecl->getType();
3696 std::string Name = fieldDecl->getNameAsString();
3697
3698 bool EleboratedType = RewriteObjCFieldDeclType(Type, Result);
3699 if (!EleboratedType)
3700 Type.getAsStringInternal(Str&: Name, Policy: Context->getPrintingPolicy());
3701 Result += Name;
3702 if (fieldDecl->isBitField()) {
3703 Result += " : "; Result += utostr(X: fieldDecl->getBitWidthValue(Ctx: *Context));
3704 }
3705 else if (EleboratedType && Type->isArrayType()) {
3706 const ArrayType *AT = Context->getAsArrayType(T: Type);
3707 do {
3708 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(Val: AT)) {
3709 Result += "[";
3710 llvm::APInt Dim = CAT->getSize();
3711 Result += utostr(X: Dim.getZExtValue());
3712 Result += "]";
3713 }
3714 AT = Context->getAsArrayType(T: AT->getElementType());
3715 } while (AT);
3716 }
3717
3718 Result += ";\n";
3719}
3720
3721/// RewriteLocallyDefinedNamedAggregates - This routine rewrites locally defined
3722/// named aggregate types into the input buffer.
3723void RewriteModernObjC::RewriteLocallyDefinedNamedAggregates(FieldDecl *fieldDecl,
3724 std::string &Result) {
3725 QualType Type = fieldDecl->getType();
3726 if (Type->getAs<TypedefType>())
3727 return;
3728 if (Type->isArrayType())
3729 Type = Context->getBaseElementType(QT: Type);
3730
3731 auto *IDecl = dyn_cast<ObjCContainerDecl>(Val: fieldDecl->getDeclContext());
3732
3733 TagDecl *TD = nullptr;
3734 if (Type->isRecordType()) {
3735 TD = Type->castAs<RecordType>()->getDecl();
3736 }
3737 else if (Type->isEnumeralType()) {
3738 TD = Type->castAs<EnumType>()->getDecl();
3739 }
3740
3741 if (TD) {
3742 if (GlobalDefinedTags.count(Ptr: TD))
3743 return;
3744
3745 bool IsNamedDefinition = false;
3746 if (IsTagDefinedInsideClass(IDecl, Tag: TD, IsNamedDefinition)) {
3747 RewriteObjCFieldDeclType(Type, Result);
3748 Result += ";";
3749 }
3750 if (IsNamedDefinition)
3751 GlobalDefinedTags.insert(Ptr: TD);
3752 }
3753}
3754
3755unsigned RewriteModernObjC::ObjCIvarBitfieldGroupNo(ObjCIvarDecl *IV) {
3756 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3757 if (ObjCInterefaceHasBitfieldGroups.count(V: CDecl)) {
3758 return IvarGroupNumber[IV];
3759 }
3760 unsigned GroupNo = 0;
3761 SmallVector<const ObjCIvarDecl *, 8> IVars;
3762 for (const ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3763 IVD; IVD = IVD->getNextIvar())
3764 IVars.push_back(Elt: IVD);
3765
3766 for (unsigned i = 0, e = IVars.size(); i < e; i++)
3767 if (IVars[i]->isBitField()) {
3768 IvarGroupNumber[IVars[i++]] = ++GroupNo;
3769 while (i < e && IVars[i]->isBitField())
3770 IvarGroupNumber[IVars[i++]] = GroupNo;
3771 if (i < e)
3772 --i;
3773 }
3774
3775 ObjCInterefaceHasBitfieldGroups.insert(V: CDecl);
3776 return IvarGroupNumber[IV];
3777}
3778
3779QualType RewriteModernObjC::SynthesizeBitfieldGroupStructType(
3780 ObjCIvarDecl *IV,
3781 SmallVectorImpl<ObjCIvarDecl *> &IVars) {
3782 std::string StructTagName;
3783 ObjCIvarBitfieldGroupType(IV, Result&: StructTagName);
3784 RecordDecl *RD = RecordDecl::Create(
3785 C: *Context, TK: TagTypeKind::Struct, DC: Context->getTranslationUnitDecl(),
3786 StartLoc: SourceLocation(), IdLoc: SourceLocation(), Id: &Context->Idents.get(Name: StructTagName));
3787 for (unsigned i=0, e = IVars.size(); i < e; i++) {
3788 ObjCIvarDecl *Ivar = IVars[i];
3789 RD->addDecl(D: FieldDecl::Create(C: *Context, DC: RD, StartLoc: SourceLocation(), IdLoc: SourceLocation(),
3790 Id: &Context->Idents.get(Name: Ivar->getName()),
3791 T: Ivar->getType(),
3792 TInfo: nullptr, /*Expr *BW */BW: Ivar->getBitWidth(),
3793 Mutable: false, InitStyle: ICIS_NoInit));
3794 }
3795 RD->completeDefinition();
3796 return Context->getTagDeclType(Decl: RD);
3797}
3798
3799QualType RewriteModernObjC::GetGroupRecordTypeForObjCIvarBitfield(ObjCIvarDecl *IV) {
3800 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3801 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3802 std::pair<const ObjCInterfaceDecl*, unsigned> tuple = std::make_pair(x&: CDecl, y&: GroupNo);
3803 if (GroupRecordType.count(Val: tuple))
3804 return GroupRecordType[tuple];
3805
3806 SmallVector<ObjCIvarDecl *, 8> IVars;
3807 for (const ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3808 IVD; IVD = IVD->getNextIvar()) {
3809 if (IVD->isBitField())
3810 IVars.push_back(Elt: const_cast<ObjCIvarDecl *>(IVD));
3811 else {
3812 if (!IVars.empty()) {
3813 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV: IVars[0]);
3814 // Generate the struct type for this group of bitfield ivars.
3815 GroupRecordType[std::make_pair(x&: CDecl, y&: GroupNo)] =
3816 SynthesizeBitfieldGroupStructType(IV: IVars[0], IVars);
3817 IVars.clear();
3818 }
3819 }
3820 }
3821 if (!IVars.empty()) {
3822 // Do the last one.
3823 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV: IVars[0]);
3824 GroupRecordType[std::make_pair(x&: CDecl, y&: GroupNo)] =
3825 SynthesizeBitfieldGroupStructType(IV: IVars[0], IVars);
3826 }
3827 QualType RetQT = GroupRecordType[tuple];
3828 assert(!RetQT.isNull() && "GetGroupRecordTypeForObjCIvarBitfield struct type is NULL");
3829
3830 return RetQT;
3831}
3832
3833/// ObjCIvarBitfieldGroupDecl - Names field decl. for ivar bitfield group.
3834/// Name would be: classname__GRBF_n where n is the group number for this ivar.
3835void RewriteModernObjC::ObjCIvarBitfieldGroupDecl(ObjCIvarDecl *IV,
3836 std::string &Result) {
3837 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3838 Result += CDecl->getName();
3839 Result += "__GRBF_";
3840 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3841 Result += utostr(X: GroupNo);
3842}
3843
3844/// ObjCIvarBitfieldGroupType - Names struct type for ivar bitfield group.
3845/// Name of the struct would be: classname__T_n where n is the group number for
3846/// this ivar.
3847void RewriteModernObjC::ObjCIvarBitfieldGroupType(ObjCIvarDecl *IV,
3848 std::string &Result) {
3849 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3850 Result += CDecl->getName();
3851 Result += "__T_";
3852 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3853 Result += utostr(X: GroupNo);
3854}
3855
3856/// ObjCIvarBitfieldGroupOffset - Names symbol for ivar bitfield group field offset.
3857/// Name would be: OBJC_IVAR_$_classname__GRBF_n where n is the group number for
3858/// this ivar.
3859void RewriteModernObjC::ObjCIvarBitfieldGroupOffset(ObjCIvarDecl *IV,
3860 std::string &Result) {
3861 Result += "OBJC_IVAR_$_";
3862 ObjCIvarBitfieldGroupDecl(IV, Result);
3863}
3864
3865#define SKIP_BITFIELDS(IX, ENDIX, VEC) { \
3866 while ((IX < ENDIX) && VEC[IX]->isBitField()) \
3867 ++IX; \
3868 if (IX < ENDIX) \
3869 --IX; \
3870}
3871
3872/// RewriteObjCInternalStruct - Rewrite one internal struct corresponding to
3873/// an objective-c class with ivars.
3874void RewriteModernObjC::RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
3875 std::string &Result) {
3876 assert(CDecl && "Class missing in SynthesizeObjCInternalStruct");
3877 assert(CDecl->getName() != "" &&
3878 "Name missing in SynthesizeObjCInternalStruct");
3879 ObjCInterfaceDecl *RCDecl = CDecl->getSuperClass();
3880 SmallVector<ObjCIvarDecl *, 8> IVars;
3881 for (ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3882 IVD; IVD = IVD->getNextIvar())
3883 IVars.push_back(Elt: IVD);
3884
3885 SourceLocation LocStart = CDecl->getBeginLoc();
3886 SourceLocation LocEnd = CDecl->getEndOfDefinitionLoc();
3887
3888 const char *startBuf = SM->getCharacterData(SL: LocStart);
3889 const char *endBuf = SM->getCharacterData(SL: LocEnd);
3890
3891 // If no ivars and no root or if its root, directly or indirectly,
3892 // have no ivars (thus not synthesized) then no need to synthesize this class.
3893 if ((!CDecl->isThisDeclarationADefinition() || IVars.size() == 0) &&
3894 (!RCDecl || !ObjCSynthesizedStructs.count(Ptr: RCDecl))) {
3895 endBuf += Lexer::MeasureTokenLength(Loc: LocEnd, SM: *SM, LangOpts);
3896 ReplaceText(Start: LocStart, OrigLength: endBuf-startBuf, Str: Result);
3897 return;
3898 }
3899
3900 // Insert named struct/union definitions inside class to
3901 // outer scope. This follows semantics of locally defined
3902 // struct/unions in objective-c classes.
3903 for (unsigned i = 0, e = IVars.size(); i < e; i++)
3904 RewriteLocallyDefinedNamedAggregates(fieldDecl: IVars[i], Result);
3905
3906 // Insert named structs which are syntheized to group ivar bitfields
3907 // to outer scope as well.
3908 for (unsigned i = 0, e = IVars.size(); i < e; i++)
3909 if (IVars[i]->isBitField()) {
3910 ObjCIvarDecl *IV = IVars[i];
3911 QualType QT = GetGroupRecordTypeForObjCIvarBitfield(IV);
3912 RewriteObjCFieldDeclType(Type&: QT, Result);
3913 Result += ";";
3914 // skip over ivar bitfields in this group.
3915 SKIP_BITFIELDS(i , e, IVars);
3916 }
3917
3918 Result += "\nstruct ";
3919 Result += CDecl->getNameAsString();
3920 Result += "_IMPL {\n";
3921
3922 if (RCDecl && ObjCSynthesizedStructs.count(Ptr: RCDecl)) {
3923 Result += "\tstruct "; Result += RCDecl->getNameAsString();
3924 Result += "_IMPL "; Result += RCDecl->getNameAsString();
3925 Result += "_IVARS;\n";
3926 }
3927
3928 for (unsigned i = 0, e = IVars.size(); i < e; i++) {
3929 if (IVars[i]->isBitField()) {
3930 ObjCIvarDecl *IV = IVars[i];
3931 Result += "\tstruct ";
3932 ObjCIvarBitfieldGroupType(IV, Result); Result += " ";
3933 ObjCIvarBitfieldGroupDecl(IV, Result); Result += ";\n";
3934 // skip over ivar bitfields in this group.
3935 SKIP_BITFIELDS(i , e, IVars);
3936 }
3937 else
3938 RewriteObjCFieldDecl(fieldDecl: IVars[i], Result);
3939 }
3940
3941 Result += "};\n";
3942 endBuf += Lexer::MeasureTokenLength(Loc: LocEnd, SM: *SM, LangOpts);
3943 ReplaceText(Start: LocStart, OrigLength: endBuf-startBuf, Str: Result);
3944 // Mark this struct as having been generated.
3945 if (!ObjCSynthesizedStructs.insert(Ptr: CDecl).second)
3946 llvm_unreachable("struct already synthesize- RewriteObjCInternalStruct");
3947}
3948
3949/// RewriteIvarOffsetSymbols - Rewrite ivar offset symbols of those ivars which
3950/// have been referenced in an ivar access expression.
3951void RewriteModernObjC::RewriteIvarOffsetSymbols(ObjCInterfaceDecl *CDecl,
3952 std::string &Result) {
3953 // write out ivar offset symbols which have been referenced in an ivar
3954 // access expression.
3955 llvm::SmallSetVector<ObjCIvarDecl *, 8> Ivars = ReferencedIvars[CDecl];
3956
3957 if (Ivars.empty())
3958 return;
3959
3960 llvm::DenseSet<std::pair<const ObjCInterfaceDecl*, unsigned> > GroupSymbolOutput;
3961 for (ObjCIvarDecl *IvarDecl : Ivars) {
3962 const ObjCInterfaceDecl *IDecl = IvarDecl->getContainingInterface();
3963 unsigned GroupNo = 0;
3964 if (IvarDecl->isBitField()) {
3965 GroupNo = ObjCIvarBitfieldGroupNo(IV: IvarDecl);
3966 if (GroupSymbolOutput.count(V: std::make_pair(x&: IDecl, y&: GroupNo)))
3967 continue;
3968 }
3969 Result += "\n";
3970 if (LangOpts.MicrosoftExt)
3971 Result += "__declspec(allocate(\".objc_ivar$B\")) ";
3972 Result += "extern \"C\" ";
3973 if (LangOpts.MicrosoftExt &&
3974 IvarDecl->getAccessControl() != ObjCIvarDecl::Private &&
3975 IvarDecl->getAccessControl() != ObjCIvarDecl::Package)
3976 Result += "__declspec(dllimport) ";
3977
3978 Result += "unsigned long ";
3979 if (IvarDecl->isBitField()) {
3980 ObjCIvarBitfieldGroupOffset(IV: IvarDecl, Result);
3981 GroupSymbolOutput.insert(V: std::make_pair(x&: IDecl, y&: GroupNo));
3982 }
3983 else
3984 WriteInternalIvarName(IDecl: CDecl, IvarDecl, Result);
3985 Result += ";";
3986 }
3987}
3988
3989//===----------------------------------------------------------------------===//
3990// Meta Data Emission
3991//===----------------------------------------------------------------------===//
3992
3993/// RewriteImplementations - This routine rewrites all method implementations
3994/// and emits meta-data.
3995
3996void RewriteModernObjC::RewriteImplementations() {
3997 int ClsDefCount = ClassImplementation.size();
3998 int CatDefCount = CategoryImplementation.size();
3999
4000 // Rewrite implemented methods
4001 for (int i = 0; i < ClsDefCount; i++) {
4002 ObjCImplementationDecl *OIMP = ClassImplementation[i];
4003 ObjCInterfaceDecl *CDecl = OIMP->getClassInterface();
4004 if (CDecl->isImplicitInterfaceDecl())
4005 assert(false &&
4006 "Legacy implicit interface rewriting not supported in moder abi");
4007 RewriteImplementationDecl(OID: OIMP);
4008 }
4009
4010 for (int i = 0; i < CatDefCount; i++) {
4011 ObjCCategoryImplDecl *CIMP = CategoryImplementation[i];
4012 ObjCInterfaceDecl *CDecl = CIMP->getClassInterface();
4013 if (CDecl->isImplicitInterfaceDecl())
4014 assert(false &&
4015 "Legacy implicit interface rewriting not supported in moder abi");
4016 RewriteImplementationDecl(OID: CIMP);
4017 }
4018}
4019
4020void RewriteModernObjC::RewriteByRefString(std::string &ResultStr,
4021 const std::string &Name,
4022 ValueDecl *VD, bool def) {
4023 assert(BlockByRefDeclNo.count(VD) &&
4024 "RewriteByRefString: ByRef decl missing");
4025 if (def)
4026 ResultStr += "struct ";
4027 ResultStr += "__Block_byref_" + Name +
4028 "_" + utostr(X: BlockByRefDeclNo[VD]) ;
4029}
4030
4031static bool HasLocalVariableExternalStorage(ValueDecl *VD) {
4032 if (VarDecl *Var = dyn_cast<VarDecl>(Val: VD))
4033 return (Var->isFunctionOrMethodVarDecl() && !Var->hasLocalStorage());
4034 return false;
4035}
4036
4037std::string RewriteModernObjC::SynthesizeBlockFunc(BlockExpr *CE, int i,
4038 StringRef funcName,
4039 const std::string &Tag) {
4040 const FunctionType *AFT = CE->getFunctionType();
4041 QualType RT = AFT->getReturnType();
4042 std::string StructRef = "struct " + Tag;
4043 SourceLocation BlockLoc = CE->getExprLoc();
4044 std::string S;
4045 ConvertSourceLocationToLineDirective(Loc: BlockLoc, LineString&: S);
4046
4047 S += "static " + RT.getAsString(Policy: Context->getPrintingPolicy()) + " __" +
4048 funcName.str() + "_block_func_" + utostr(X: i);
4049
4050 BlockDecl *BD = CE->getBlockDecl();
4051
4052 if (isa<FunctionNoProtoType>(Val: AFT)) {
4053 // No user-supplied arguments. Still need to pass in a pointer to the
4054 // block (to reference imported block decl refs).
4055 S += "(" + StructRef + " *__cself)";
4056 } else if (BD->param_empty()) {
4057 S += "(" + StructRef + " *__cself)";
4058 } else {
4059 const FunctionProtoType *FT = cast<FunctionProtoType>(Val: AFT);
4060 assert(FT && "SynthesizeBlockFunc: No function proto");
4061 S += '(';
4062 // first add the implicit argument.
4063 S += StructRef + " *__cself, ";
4064 std::string ParamStr;
4065 for (BlockDecl::param_iterator AI = BD->param_begin(),
4066 E = BD->param_end(); AI != E; ++AI) {
4067 if (AI != BD->param_begin()) S += ", ";
4068 ParamStr = (*AI)->getNameAsString();
4069 QualType QT = (*AI)->getType();
4070 (void)convertBlockPointerToFunctionPointer(T&: QT);
4071 QT.getAsStringInternal(Str&: ParamStr, Policy: Context->getPrintingPolicy());
4072 S += ParamStr;
4073 }
4074 if (FT->isVariadic()) {
4075 if (!BD->param_empty()) S += ", ";
4076 S += "...";
4077 }
4078 S += ')';
4079 }
4080 S += " {\n";
4081
4082 // Create local declarations to avoid rewriting all closure decl ref exprs.
4083 // First, emit a declaration for all "by ref" decls.
4084 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4085 E = BlockByRefDecls.end(); I != E; ++I) {
4086 S += " ";
4087 std::string Name = (*I)->getNameAsString();
4088 std::string TypeString;
4089 RewriteByRefString(ResultStr&: TypeString, Name, VD: (*I));
4090 TypeString += " *";
4091 Name = TypeString + Name;
4092 S += Name + " = __cself->" + (*I)->getNameAsString() + "; // bound by ref\n";
4093 }
4094 // Next, emit a declaration for all "by copy" declarations.
4095 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4096 E = BlockByCopyDecls.end(); I != E; ++I) {
4097 S += " ";
4098 // Handle nested closure invocation. For example:
4099 //
4100 // void (^myImportedClosure)(void);
4101 // myImportedClosure = ^(void) { setGlobalInt(x + y); };
4102 //
4103 // void (^anotherClosure)(void);
4104 // anotherClosure = ^(void) {
4105 // myImportedClosure(); // import and invoke the closure
4106 // };
4107 //
4108 if (isTopLevelBlockPointerType(T: (*I)->getType())) {
4109 RewriteBlockPointerTypeVariable(Str&: S, VD: (*I));
4110 S += " = (";
4111 RewriteBlockPointerType(Str&: S, Type: (*I)->getType());
4112 S += ")";
4113 S += "__cself->" + (*I)->getNameAsString() + "; // bound by copy\n";
4114 }
4115 else {
4116 std::string Name = (*I)->getNameAsString();
4117 QualType QT = (*I)->getType();
4118 if (HasLocalVariableExternalStorage(VD: *I))
4119 QT = Context->getPointerType(T: QT);
4120 QT.getAsStringInternal(Str&: Name, Policy: Context->getPrintingPolicy());
4121 S += Name + " = __cself->" +
4122 (*I)->getNameAsString() + "; // bound by copy\n";
4123 }
4124 }
4125 std::string RewrittenStr = RewrittenBlockExprs[CE];
4126 const char *cstr = RewrittenStr.c_str();
4127 while (*cstr++ != '{') ;
4128 S += cstr;
4129 S += "\n";
4130 return S;
4131}
4132
4133std::string RewriteModernObjC::SynthesizeBlockHelperFuncs(
4134 BlockExpr *CE, int i, StringRef funcName, const std::string &Tag) {
4135 std::string StructRef = "struct " + Tag;
4136 std::string S = "static void __";
4137
4138 S += funcName;
4139 S += "_block_copy_" + utostr(X: i);
4140 S += "(" + StructRef;
4141 S += "*dst, " + StructRef;
4142 S += "*src) {";
4143 for (ValueDecl *VD : ImportedBlockDecls) {
4144 S += "_Block_object_assign((void*)&dst->";
4145 S += VD->getNameAsString();
4146 S += ", (void*)src->";
4147 S += VD->getNameAsString();
4148 if (BlockByRefDeclsPtrSet.count(Ptr: VD))
4149 S += ", " + utostr(X: BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
4150 else if (VD->getType()->isBlockPointerType())
4151 S += ", " + utostr(X: BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
4152 else
4153 S += ", " + utostr(X: BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
4154 }
4155 S += "}\n";
4156
4157 S += "\nstatic void __";
4158 S += funcName;
4159 S += "_block_dispose_" + utostr(X: i);
4160 S += "(" + StructRef;
4161 S += "*src) {";
4162 for (ValueDecl *VD : ImportedBlockDecls) {
4163 S += "_Block_object_dispose((void*)src->";
4164 S += VD->getNameAsString();
4165 if (BlockByRefDeclsPtrSet.count(Ptr: VD))
4166 S += ", " + utostr(X: BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
4167 else if (VD->getType()->isBlockPointerType())
4168 S += ", " + utostr(X: BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
4169 else
4170 S += ", " + utostr(X: BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
4171 }
4172 S += "}\n";
4173 return S;
4174}
4175
4176std::string RewriteModernObjC::SynthesizeBlockImpl(BlockExpr *CE,
4177 const std::string &Tag,
4178 const std::string &Desc) {
4179 std::string S = "\nstruct " + Tag;
4180 std::string Constructor = " " + Tag;
4181
4182 S += " {\n struct __block_impl impl;\n";
4183 S += " struct " + Desc;
4184 S += "* Desc;\n";
4185
4186 Constructor += "(void *fp, "; // Invoke function pointer.
4187 Constructor += "struct " + Desc; // Descriptor pointer.
4188 Constructor += " *desc";
4189
4190 if (BlockDeclRefs.size()) {
4191 // Output all "by copy" declarations.
4192 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4193 E = BlockByCopyDecls.end(); I != E; ++I) {
4194 S += " ";
4195 std::string FieldName = (*I)->getNameAsString();
4196 std::string ArgName = "_" + FieldName;
4197 // Handle nested closure invocation. For example:
4198 //
4199 // void (^myImportedBlock)(void);
4200 // myImportedBlock = ^(void) { setGlobalInt(x + y); };
4201 //
4202 // void (^anotherBlock)(void);
4203 // anotherBlock = ^(void) {
4204 // myImportedBlock(); // import and invoke the closure
4205 // };
4206 //
4207 if (isTopLevelBlockPointerType(T: (*I)->getType())) {
4208 S += "struct __block_impl *";
4209 Constructor += ", void *" + ArgName;
4210 } else {
4211 QualType QT = (*I)->getType();
4212 if (HasLocalVariableExternalStorage(VD: *I))
4213 QT = Context->getPointerType(T: QT);
4214 QT.getAsStringInternal(Str&: FieldName, Policy: Context->getPrintingPolicy());
4215 QT.getAsStringInternal(Str&: ArgName, Policy: Context->getPrintingPolicy());
4216 Constructor += ", " + ArgName;
4217 }
4218 S += FieldName + ";\n";
4219 }
4220 // Output all "by ref" declarations.
4221 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4222 E = BlockByRefDecls.end(); I != E; ++I) {
4223 S += " ";
4224 std::string FieldName = (*I)->getNameAsString();
4225 std::string ArgName = "_" + FieldName;
4226 {
4227 std::string TypeString;
4228 RewriteByRefString(ResultStr&: TypeString, Name: FieldName, VD: (*I));
4229 TypeString += " *";
4230 FieldName = TypeString + FieldName;
4231 ArgName = TypeString + ArgName;
4232 Constructor += ", " + ArgName;
4233 }
4234 S += FieldName + "; // by ref\n";
4235 }
4236 // Finish writing the constructor.
4237 Constructor += ", int flags=0)";
4238 // Initialize all "by copy" arguments.
4239 bool firsTime = true;
4240 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4241 E = BlockByCopyDecls.end(); I != E; ++I) {
4242 std::string Name = (*I)->getNameAsString();
4243 if (firsTime) {
4244 Constructor += " : ";
4245 firsTime = false;
4246 }
4247 else
4248 Constructor += ", ";
4249 if (isTopLevelBlockPointerType(T: (*I)->getType()))
4250 Constructor += Name + "((struct __block_impl *)_" + Name + ")";
4251 else
4252 Constructor += Name + "(_" + Name + ")";
4253 }
4254 // Initialize all "by ref" arguments.
4255 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4256 E = BlockByRefDecls.end(); I != E; ++I) {
4257 std::string Name = (*I)->getNameAsString();
4258 if (firsTime) {
4259 Constructor += " : ";
4260 firsTime = false;
4261 }
4262 else
4263 Constructor += ", ";
4264 Constructor += Name + "(_" + Name + "->__forwarding)";
4265 }
4266
4267 Constructor += " {\n";
4268 if (GlobalVarDecl)
4269 Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
4270 else
4271 Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
4272 Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
4273
4274 Constructor += " Desc = desc;\n";
4275 } else {
4276 // Finish writing the constructor.
4277 Constructor += ", int flags=0) {\n";
4278 if (GlobalVarDecl)
4279 Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
4280 else
4281 Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
4282 Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
4283 Constructor += " Desc = desc;\n";
4284 }
4285 Constructor += " ";
4286 Constructor += "}\n";
4287 S += Constructor;
4288 S += "};\n";
4289 return S;
4290}
4291
4292std::string RewriteModernObjC::SynthesizeBlockDescriptor(
4293 const std::string &DescTag, const std::string &ImplTag, int i,
4294 StringRef FunName, unsigned hasCopy) {
4295 std::string S = "\nstatic struct " + DescTag;
4296
4297 S += " {\n size_t reserved;\n";
4298 S += " size_t Block_size;\n";
4299 if (hasCopy) {
4300 S += " void (*copy)(struct ";
4301 S += ImplTag; S += "*, struct ";
4302 S += ImplTag; S += "*);\n";
4303
4304 S += " void (*dispose)(struct ";
4305 S += ImplTag; S += "*);\n";
4306 }
4307 S += "} ";
4308
4309 S += DescTag + "_DATA = { 0, sizeof(struct ";
4310 S += ImplTag + ")";
4311 if (hasCopy) {
4312 S += ", __" + FunName.str() + "_block_copy_" + utostr(X: i);
4313 S += ", __" + FunName.str() + "_block_dispose_" + utostr(X: i);
4314 }
4315 S += "};\n";
4316 return S;
4317}
4318
4319void RewriteModernObjC::SynthesizeBlockLiterals(SourceLocation FunLocStart,
4320 StringRef FunName) {
4321 bool RewriteSC = (GlobalVarDecl &&
4322 !Blocks.empty() &&
4323 GlobalVarDecl->getStorageClass() == SC_Static &&
4324 GlobalVarDecl->getType().getCVRQualifiers());
4325 if (RewriteSC) {
4326 std::string SC(" void __");
4327 SC += GlobalVarDecl->getNameAsString();
4328 SC += "() {}";
4329 InsertText(Loc: FunLocStart, Str: SC);
4330 }
4331
4332 // Insert closures that were part of the function.
4333 for (unsigned i = 0, count=0; i < Blocks.size(); i++) {
4334 CollectBlockDeclRefInfo(Exp: Blocks[i]);
4335 // Need to copy-in the inner copied-in variables not actually used in this
4336 // block.
4337 for (int j = 0; j < InnerDeclRefsCount[i]; j++) {
4338 DeclRefExpr *Exp = InnerDeclRefs[count++];
4339 ValueDecl *VD = Exp->getDecl();
4340 BlockDeclRefs.push_back(Elt: Exp);
4341 if (!VD->hasAttr<BlocksAttr>()) {
4342 if (!BlockByCopyDeclsPtrSet.count(Ptr: VD)) {
4343 BlockByCopyDeclsPtrSet.insert(Ptr: VD);
4344 BlockByCopyDecls.push_back(Elt: VD);
4345 }
4346 continue;
4347 }
4348
4349 if (!BlockByRefDeclsPtrSet.count(Ptr: VD)) {
4350 BlockByRefDeclsPtrSet.insert(Ptr: VD);
4351 BlockByRefDecls.push_back(Elt: VD);
4352 }
4353
4354 // imported objects in the inner blocks not used in the outer
4355 // blocks must be copied/disposed in the outer block as well.
4356 if (VD->getType()->isObjCObjectPointerType() ||
4357 VD->getType()->isBlockPointerType())
4358 ImportedBlockDecls.insert(Ptr: VD);
4359 }
4360
4361 std::string ImplTag = "__" + FunName.str() + "_block_impl_" + utostr(X: i);
4362 std::string DescTag = "__" + FunName.str() + "_block_desc_" + utostr(X: i);
4363
4364 std::string CI = SynthesizeBlockImpl(CE: Blocks[i], Tag: ImplTag, Desc: DescTag);
4365
4366 InsertText(Loc: FunLocStart, Str: CI);
4367
4368 std::string CF = SynthesizeBlockFunc(CE: Blocks[i], i, funcName: FunName, Tag: ImplTag);
4369
4370 InsertText(Loc: FunLocStart, Str: CF);
4371
4372 if (ImportedBlockDecls.size()) {
4373 std::string HF = SynthesizeBlockHelperFuncs(CE: Blocks[i], i, funcName: FunName, Tag: ImplTag);
4374 InsertText(Loc: FunLocStart, Str: HF);
4375 }
4376 std::string BD = SynthesizeBlockDescriptor(DescTag, ImplTag, i, FunName,
4377 hasCopy: ImportedBlockDecls.size() > 0);
4378 InsertText(Loc: FunLocStart, Str: BD);
4379
4380 BlockDeclRefs.clear();
4381 BlockByRefDecls.clear();
4382 BlockByRefDeclsPtrSet.clear();
4383 BlockByCopyDecls.clear();
4384 BlockByCopyDeclsPtrSet.clear();
4385 ImportedBlockDecls.clear();
4386 }
4387 if (RewriteSC) {
4388 // Must insert any 'const/volatile/static here. Since it has been
4389 // removed as result of rewriting of block literals.
4390 std::string SC;
4391 if (GlobalVarDecl->getStorageClass() == SC_Static)
4392 SC = "static ";
4393 if (GlobalVarDecl->getType().isConstQualified())
4394 SC += "const ";
4395 if (GlobalVarDecl->getType().isVolatileQualified())
4396 SC += "volatile ";
4397 if (GlobalVarDecl->getType().isRestrictQualified())
4398 SC += "restrict ";
4399 InsertText(Loc: FunLocStart, Str: SC);
4400 }
4401 if (GlobalConstructionExp) {
4402 // extra fancy dance for global literal expression.
4403
4404 // Always the latest block expression on the block stack.
4405 std::string Tag = "__";
4406 Tag += FunName;
4407 Tag += "_block_impl_";
4408 Tag += utostr(X: Blocks.size()-1);
4409 std::string globalBuf = "static ";
4410 globalBuf += Tag; globalBuf += " ";
4411 std::string SStr;
4412
4413 llvm::raw_string_ostream constructorExprBuf(SStr);
4414 GlobalConstructionExp->printPretty(OS&: constructorExprBuf, Helper: nullptr,
4415 Policy: PrintingPolicy(LangOpts));
4416 globalBuf += SStr;
4417 globalBuf += ";\n";
4418 InsertText(Loc: FunLocStart, Str: globalBuf);
4419 GlobalConstructionExp = nullptr;
4420 }
4421
4422 Blocks.clear();
4423 InnerDeclRefsCount.clear();
4424 InnerDeclRefs.clear();
4425 RewrittenBlockExprs.clear();
4426}
4427
4428void RewriteModernObjC::InsertBlockLiteralsWithinFunction(FunctionDecl *FD) {
4429 SourceLocation FunLocStart =
4430 (!Blocks.empty()) ? getFunctionSourceLocation(R&: *this, FD)
4431 : FD->getTypeSpecStartLoc();
4432 StringRef FuncName = FD->getName();
4433
4434 SynthesizeBlockLiterals(FunLocStart, FunName: FuncName);
4435}
4436
4437static void BuildUniqueMethodName(std::string &Name,
4438 ObjCMethodDecl *MD) {
4439 ObjCInterfaceDecl *IFace = MD->getClassInterface();
4440 Name = std::string(IFace->getName());
4441 Name += "__" + MD->getSelector().getAsString();
4442 // Convert colons to underscores.
4443 std::string::size_type loc = 0;
4444 while ((loc = Name.find(c: ':', pos: loc)) != std::string::npos)
4445 Name.replace(pos: loc, n1: 1, s: "_");
4446}
4447
4448void RewriteModernObjC::InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD) {
4449 // fprintf(stderr,"In InsertBlockLiteralsWitinMethod\n");
4450 // SourceLocation FunLocStart = MD->getBeginLoc();
4451 SourceLocation FunLocStart = MD->getBeginLoc();
4452 std::string FuncName;
4453 BuildUniqueMethodName(Name&: FuncName, MD);
4454 SynthesizeBlockLiterals(FunLocStart, FunName: FuncName);
4455}
4456
4457void RewriteModernObjC::GetBlockDeclRefExprs(Stmt *S) {
4458 for (Stmt *SubStmt : S->children())
4459 if (SubStmt) {
4460 if (BlockExpr *CBE = dyn_cast<BlockExpr>(Val: SubStmt))
4461 GetBlockDeclRefExprs(S: CBE->getBody());
4462 else
4463 GetBlockDeclRefExprs(S: SubStmt);
4464 }
4465 // Handle specific things.
4466 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Val: S))
4467 if (DRE->refersToEnclosingVariableOrCapture() ||
4468 HasLocalVariableExternalStorage(VD: DRE->getDecl()))
4469 // FIXME: Handle enums.
4470 BlockDeclRefs.push_back(Elt: DRE);
4471}
4472
4473void RewriteModernObjC::GetInnerBlockDeclRefExprs(Stmt *S,
4474 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
4475 llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts) {
4476 for (Stmt *SubStmt : S->children())
4477 if (SubStmt) {
4478 if (BlockExpr *CBE = dyn_cast<BlockExpr>(Val: SubStmt)) {
4479 InnerContexts.insert(Ptr: cast<DeclContext>(Val: CBE->getBlockDecl()));
4480 GetInnerBlockDeclRefExprs(S: CBE->getBody(),
4481 InnerBlockDeclRefs,
4482 InnerContexts);
4483 }
4484 else
4485 GetInnerBlockDeclRefExprs(S: SubStmt, InnerBlockDeclRefs, InnerContexts);
4486 }
4487 // Handle specific things.
4488 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Val: S)) {
4489 if (DRE->refersToEnclosingVariableOrCapture() ||
4490 HasLocalVariableExternalStorage(VD: DRE->getDecl())) {
4491 if (!InnerContexts.count(Ptr: DRE->getDecl()->getDeclContext()))
4492 InnerBlockDeclRefs.push_back(Elt: DRE);
4493 if (VarDecl *Var = cast<VarDecl>(Val: DRE->getDecl()))
4494 if (Var->isFunctionOrMethodVarDecl())
4495 ImportedLocalExternalDecls.insert(Ptr: Var);
4496 }
4497 }
4498}
4499
4500/// convertObjCTypeToCStyleType - This routine converts such objc types
4501/// as qualified objects, and blocks to their closest c/c++ types that
4502/// it can. It returns true if input type was modified.
4503bool RewriteModernObjC::convertObjCTypeToCStyleType(QualType &T) {
4504 QualType oldT = T;
4505 convertBlockPointerToFunctionPointer(T);
4506 if (T->isFunctionPointerType()) {
4507 QualType PointeeTy;
4508 if (const PointerType* PT = T->getAs<PointerType>()) {
4509 PointeeTy = PT->getPointeeType();
4510 if (const FunctionType *FT = PointeeTy->getAs<FunctionType>()) {
4511 T = convertFunctionTypeOfBlocks(FT);
4512 T = Context->getPointerType(T);
4513 }
4514 }
4515 }
4516
4517 convertToUnqualifiedObjCType(T);
4518 return T != oldT;
4519}
4520
4521/// convertFunctionTypeOfBlocks - This routine converts a function type
4522/// whose result type may be a block pointer or whose argument type(s)
4523/// might be block pointers to an equivalent function type replacing
4524/// all block pointers to function pointers.
4525QualType RewriteModernObjC::convertFunctionTypeOfBlocks(const FunctionType *FT) {
4526 const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(Val: FT);
4527 // FTP will be null for closures that don't take arguments.
4528 // Generate a funky cast.
4529 SmallVector<QualType, 8> ArgTypes;
4530 QualType Res = FT->getReturnType();
4531 bool modified = convertObjCTypeToCStyleType(T&: Res);
4532
4533 if (FTP) {
4534 for (auto &I : FTP->param_types()) {
4535 QualType t = I;
4536 // Make sure we convert "t (^)(...)" to "t (*)(...)".
4537 if (convertObjCTypeToCStyleType(T&: t))
4538 modified = true;
4539 ArgTypes.push_back(Elt: t);
4540 }
4541 }
4542 QualType FuncType;
4543 if (modified)
4544 FuncType = getSimpleFunctionType(result: Res, args: ArgTypes);
4545 else FuncType = QualType(FT, 0);
4546 return FuncType;
4547}
4548
4549Stmt *RewriteModernObjC::SynthesizeBlockCall(CallExpr *Exp, const Expr *BlockExp) {
4550 // Navigate to relevant type information.
4551 const BlockPointerType *CPT = nullptr;
4552
4553 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Val: BlockExp)) {
4554 CPT = DRE->getType()->getAs<BlockPointerType>();
4555 } else if (const MemberExpr *MExpr = dyn_cast<MemberExpr>(Val: BlockExp)) {
4556 CPT = MExpr->getType()->getAs<BlockPointerType>();
4557 }
4558 else if (const ParenExpr *PRE = dyn_cast<ParenExpr>(Val: BlockExp)) {
4559 return SynthesizeBlockCall(Exp, BlockExp: PRE->getSubExpr());
4560 }
4561 else if (const ImplicitCastExpr *IEXPR = dyn_cast<ImplicitCastExpr>(Val: BlockExp))
4562 CPT = IEXPR->getType()->getAs<BlockPointerType>();
4563 else if (const ConditionalOperator *CEXPR =
4564 dyn_cast<ConditionalOperator>(Val: BlockExp)) {
4565 Expr *LHSExp = CEXPR->getLHS();
4566 Stmt *LHSStmt = SynthesizeBlockCall(Exp, BlockExp: LHSExp);
4567 Expr *RHSExp = CEXPR->getRHS();
4568 Stmt *RHSStmt = SynthesizeBlockCall(Exp, BlockExp: RHSExp);
4569 Expr *CONDExp = CEXPR->getCond();
4570 ConditionalOperator *CondExpr = new (Context) ConditionalOperator(
4571 CONDExp, SourceLocation(), cast<Expr>(Val: LHSStmt), SourceLocation(),
4572 cast<Expr>(Val: RHSStmt), Exp->getType(), VK_PRValue, OK_Ordinary);
4573 return CondExpr;
4574 } else if (const ObjCIvarRefExpr *IRE = dyn_cast<ObjCIvarRefExpr>(Val: BlockExp)) {
4575 CPT = IRE->getType()->getAs<BlockPointerType>();
4576 } else if (const PseudoObjectExpr *POE
4577 = dyn_cast<PseudoObjectExpr>(Val: BlockExp)) {
4578 CPT = POE->getType()->castAs<BlockPointerType>();
4579 } else {
4580 assert(false && "RewriteBlockClass: Bad type");
4581 }
4582 assert(CPT && "RewriteBlockClass: Bad type");
4583 const FunctionType *FT = CPT->getPointeeType()->getAs<FunctionType>();
4584 assert(FT && "RewriteBlockClass: Bad type");
4585 const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(Val: FT);
4586 // FTP will be null for closures that don't take arguments.
4587
4588 RecordDecl *RD = RecordDecl::Create(C: *Context, TK: TagTypeKind::Struct, DC: TUDecl,
4589 StartLoc: SourceLocation(), IdLoc: SourceLocation(),
4590 Id: &Context->Idents.get(Name: "__block_impl"));
4591 QualType PtrBlock = Context->getPointerType(T: Context->getTagDeclType(Decl: RD));
4592
4593 // Generate a funky cast.
4594 SmallVector<QualType, 8> ArgTypes;
4595
4596 // Push the block argument type.
4597 ArgTypes.push_back(Elt: PtrBlock);
4598 if (FTP) {
4599 for (auto &I : FTP->param_types()) {
4600 QualType t = I;
4601 // Make sure we convert "t (^)(...)" to "t (*)(...)".
4602 if (!convertBlockPointerToFunctionPointer(T&: t))
4603 convertToUnqualifiedObjCType(T&: t);
4604 ArgTypes.push_back(Elt: t);
4605 }
4606 }
4607 // Now do the pointer to function cast.
4608 QualType PtrToFuncCastType = getSimpleFunctionType(result: Exp->getType(), args: ArgTypes);
4609
4610 PtrToFuncCastType = Context->getPointerType(T: PtrToFuncCastType);
4611
4612 CastExpr *BlkCast = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: PtrBlock,
4613 Kind: CK_BitCast,
4614 E: const_cast<Expr*>(BlockExp));
4615 // Don't forget the parens to enforce the proper binding.
4616 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
4617 BlkCast);
4618 //PE->dump();
4619
4620 FieldDecl *FD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(),
4621 IdLoc: SourceLocation(),
4622 Id: &Context->Idents.get(Name: "FuncPtr"),
4623 T: Context->VoidPtrTy, TInfo: nullptr,
4624 /*BitWidth=*/BW: nullptr, /*Mutable=*/true,
4625 InitStyle: ICIS_NoInit);
4626 MemberExpr *ME = MemberExpr::CreateImplicit(
4627 C: *Context, Base: PE, IsArrow: true, MemberDecl: FD, T: FD->getType(), VK: VK_LValue, OK: OK_Ordinary);
4628
4629 CastExpr *FunkCast = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: PtrToFuncCastType,
4630 Kind: CK_BitCast, E: ME);
4631 PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), FunkCast);
4632
4633 SmallVector<Expr*, 8> BlkExprs;
4634 // Add the implicit argument.
4635 BlkExprs.push_back(Elt: BlkCast);
4636 // Add the user arguments.
4637 for (CallExpr::arg_iterator I = Exp->arg_begin(),
4638 E = Exp->arg_end(); I != E; ++I) {
4639 BlkExprs.push_back(Elt: *I);
4640 }
4641 CallExpr *CE =
4642 CallExpr::Create(Ctx: *Context, Fn: PE, Args: BlkExprs, Ty: Exp->getType(), VK: VK_PRValue,
4643 RParenLoc: SourceLocation(), FPFeatures: FPOptionsOverride());
4644 return CE;
4645}
4646
4647// We need to return the rewritten expression to handle cases where the
4648// DeclRefExpr is embedded in another expression being rewritten.
4649// For example:
4650//
4651// int main() {
4652// __block Foo *f;
4653// __block int i;
4654//
4655// void (^myblock)() = ^() {
4656// [f test]; // f is a DeclRefExpr embedded in a message (which is being rewritten).
4657// i = 77;
4658// };
4659//}
4660Stmt *RewriteModernObjC::RewriteBlockDeclRefExpr(DeclRefExpr *DeclRefExp) {
4661 // Rewrite the byref variable into BYREFVAR->__forwarding->BYREFVAR
4662 // for each DeclRefExp where BYREFVAR is name of the variable.
4663 ValueDecl *VD = DeclRefExp->getDecl();
4664 bool isArrow = DeclRefExp->refersToEnclosingVariableOrCapture() ||
4665 HasLocalVariableExternalStorage(VD: DeclRefExp->getDecl());
4666
4667 FieldDecl *FD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(),
4668 IdLoc: SourceLocation(),
4669 Id: &Context->Idents.get(Name: "__forwarding"),
4670 T: Context->VoidPtrTy, TInfo: nullptr,
4671 /*BitWidth=*/BW: nullptr, /*Mutable=*/true,
4672 InitStyle: ICIS_NoInit);
4673 MemberExpr *ME = MemberExpr::CreateImplicit(
4674 C: *Context, Base: DeclRefExp, IsArrow: isArrow, MemberDecl: FD, T: FD->getType(), VK: VK_LValue, OK: OK_Ordinary);
4675
4676 StringRef Name = VD->getName();
4677 FD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(), IdLoc: SourceLocation(),
4678 Id: &Context->Idents.get(Name),
4679 T: Context->VoidPtrTy, TInfo: nullptr,
4680 /*BitWidth=*/BW: nullptr, /*Mutable=*/true,
4681 InitStyle: ICIS_NoInit);
4682 ME = MemberExpr::CreateImplicit(C: *Context, Base: ME, IsArrow: true, MemberDecl: FD, T: DeclRefExp->getType(),
4683 VK: VK_LValue, OK: OK_Ordinary);
4684
4685 // Need parens to enforce precedence.
4686 ParenExpr *PE = new (Context) ParenExpr(DeclRefExp->getExprLoc(),
4687 DeclRefExp->getExprLoc(),
4688 ME);
4689 ReplaceStmt(Old: DeclRefExp, New: PE);
4690 return PE;
4691}
4692
4693// Rewrites the imported local variable V with external storage
4694// (static, extern, etc.) as *V
4695//
4696Stmt *RewriteModernObjC::RewriteLocalVariableExternalStorage(DeclRefExpr *DRE) {
4697 ValueDecl *VD = DRE->getDecl();
4698 if (VarDecl *Var = dyn_cast<VarDecl>(Val: VD))
4699 if (!ImportedLocalExternalDecls.count(Ptr: Var))
4700 return DRE;
4701 Expr *Exp = UnaryOperator::Create(
4702 C: const_cast<ASTContext &>(*Context), input: DRE, opc: UO_Deref, type: DRE->getType(),
4703 VK: VK_LValue, OK: OK_Ordinary, l: DRE->getLocation(), CanOverflow: false, FPFeatures: FPOptionsOverride());
4704 // Need parens to enforce precedence.
4705 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
4706 Exp);
4707 ReplaceStmt(Old: DRE, New: PE);
4708 return PE;
4709}
4710
4711void RewriteModernObjC::RewriteCastExpr(CStyleCastExpr *CE) {
4712 SourceLocation LocStart = CE->getLParenLoc();
4713 SourceLocation LocEnd = CE->getRParenLoc();
4714
4715 // Need to avoid trying to rewrite synthesized casts.
4716 if (LocStart.isInvalid())
4717 return;
4718 // Need to avoid trying to rewrite casts contained in macros.
4719 if (!Rewriter::isRewritable(Loc: LocStart) || !Rewriter::isRewritable(Loc: LocEnd))
4720 return;
4721
4722 const char *startBuf = SM->getCharacterData(SL: LocStart);
4723 const char *endBuf = SM->getCharacterData(SL: LocEnd);
4724 QualType QT = CE->getType();
4725 const Type* TypePtr = QT->getAs<Type>();
4726 if (isa<TypeOfExprType>(Val: TypePtr)) {
4727 const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(Val: TypePtr);
4728 QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
4729 std::string TypeAsString = "(";
4730 RewriteBlockPointerType(Str&: TypeAsString, Type: QT);
4731 TypeAsString += ")";
4732 ReplaceText(Start: LocStart, OrigLength: endBuf-startBuf+1, Str: TypeAsString);
4733 return;
4734 }
4735 // advance the location to startArgList.
4736 const char *argPtr = startBuf;
4737
4738 while (*argPtr++ && (argPtr < endBuf)) {
4739 switch (*argPtr) {
4740 case '^':
4741 // Replace the '^' with '*'.
4742 LocStart = LocStart.getLocWithOffset(Offset: argPtr-startBuf);
4743 ReplaceText(Start: LocStart, OrigLength: 1, Str: "*");
4744 break;
4745 }
4746 }
4747}
4748
4749void RewriteModernObjC::RewriteImplicitCastObjCExpr(CastExpr *IC) {
4750 CastKind CastKind = IC->getCastKind();
4751 if (CastKind != CK_BlockPointerToObjCPointerCast &&
4752 CastKind != CK_AnyPointerToBlockPointerCast)
4753 return;
4754
4755 QualType QT = IC->getType();
4756 (void)convertBlockPointerToFunctionPointer(T&: QT);
4757 std::string TypeString(QT.getAsString(Policy: Context->getPrintingPolicy()));
4758 std::string Str = "(";
4759 Str += TypeString;
4760 Str += ")";
4761 InsertText(Loc: IC->getSubExpr()->getBeginLoc(), Str);
4762}
4763
4764void RewriteModernObjC::RewriteBlockPointerFunctionArgs(FunctionDecl *FD) {
4765 SourceLocation DeclLoc = FD->getLocation();
4766 unsigned parenCount = 0;
4767
4768 // We have 1 or more arguments that have closure pointers.
4769 const char *startBuf = SM->getCharacterData(SL: DeclLoc);
4770 const char *startArgList = strchr(s: startBuf, c: '(');
4771
4772 assert((*startArgList == '(') && "Rewriter fuzzy parser confused");
4773
4774 parenCount++;
4775 // advance the location to startArgList.
4776 DeclLoc = DeclLoc.getLocWithOffset(Offset: startArgList-startBuf);
4777 assert((DeclLoc.isValid()) && "Invalid DeclLoc");
4778
4779 const char *argPtr = startArgList;
4780
4781 while (*argPtr++ && parenCount) {
4782 switch (*argPtr) {
4783 case '^':
4784 // Replace the '^' with '*'.
4785 DeclLoc = DeclLoc.getLocWithOffset(Offset: argPtr-startArgList);
4786 ReplaceText(Start: DeclLoc, OrigLength: 1, Str: "*");
4787 break;
4788 case '(':
4789 parenCount++;
4790 break;
4791 case ')':
4792 parenCount--;
4793 break;
4794 }
4795 }
4796}
4797
4798bool RewriteModernObjC::PointerTypeTakesAnyBlockArguments(QualType QT) {
4799 const FunctionProtoType *FTP;
4800 const PointerType *PT = QT->getAs<PointerType>();
4801 if (PT) {
4802 FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
4803 } else {
4804 const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
4805 assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
4806 FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
4807 }
4808 if (FTP) {
4809 for (const auto &I : FTP->param_types())
4810 if (isTopLevelBlockPointerType(T: I))
4811 return true;
4812 }
4813 return false;
4814}
4815
4816bool RewriteModernObjC::PointerTypeTakesAnyObjCQualifiedType(QualType QT) {
4817 const FunctionProtoType *FTP;
4818 const PointerType *PT = QT->getAs<PointerType>();
4819 if (PT) {
4820 FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
4821 } else {
4822 const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
4823 assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
4824 FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
4825 }
4826 if (FTP) {
4827 for (const auto &I : FTP->param_types()) {
4828 if (I->isObjCQualifiedIdType())
4829 return true;
4830 if (I->isObjCObjectPointerType() &&
4831 I->getPointeeType()->isObjCQualifiedInterfaceType())
4832 return true;
4833 }
4834
4835 }
4836 return false;
4837}
4838
4839void RewriteModernObjC::GetExtentOfArgList(const char *Name, const char *&LParen,
4840 const char *&RParen) {
4841 const char *argPtr = strchr(s: Name, c: '(');
4842 assert((*argPtr == '(') && "Rewriter fuzzy parser confused");
4843
4844 LParen = argPtr; // output the start.
4845 argPtr++; // skip past the left paren.
4846 unsigned parenCount = 1;
4847
4848 while (*argPtr && parenCount) {
4849 switch (*argPtr) {
4850 case '(': parenCount++; break;
4851 case ')': parenCount--; break;
4852 default: break;
4853 }
4854 if (parenCount) argPtr++;
4855 }
4856 assert((*argPtr == ')') && "Rewriter fuzzy parser confused");
4857 RParen = argPtr; // output the end
4858}
4859
4860void RewriteModernObjC::RewriteBlockPointerDecl(NamedDecl *ND) {
4861 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Val: ND)) {
4862 RewriteBlockPointerFunctionArgs(FD);
4863 return;
4864 }
4865 // Handle Variables and Typedefs.
4866 SourceLocation DeclLoc = ND->getLocation();
4867 QualType DeclT;
4868 if (VarDecl *VD = dyn_cast<VarDecl>(Val: ND))
4869 DeclT = VD->getType();
4870 else if (TypedefNameDecl *TDD = dyn_cast<TypedefNameDecl>(Val: ND))
4871 DeclT = TDD->getUnderlyingType();
4872 else if (FieldDecl *FD = dyn_cast<FieldDecl>(Val: ND))
4873 DeclT = FD->getType();
4874 else
4875 llvm_unreachable("RewriteBlockPointerDecl(): Decl type not yet handled");
4876
4877 const char *startBuf = SM->getCharacterData(SL: DeclLoc);
4878 const char *endBuf = startBuf;
4879 // scan backward (from the decl location) for the end of the previous decl.
4880 while (*startBuf != '^' && *startBuf != ';' && startBuf != MainFileStart)
4881 startBuf--;
4882 SourceLocation Start = DeclLoc.getLocWithOffset(Offset: startBuf-endBuf);
4883 std::string buf;
4884 unsigned OrigLength=0;
4885 // *startBuf != '^' if we are dealing with a pointer to function that
4886 // may take block argument types (which will be handled below).
4887 if (*startBuf == '^') {
4888 // Replace the '^' with '*', computing a negative offset.
4889 buf = '*';
4890 startBuf++;
4891 OrigLength++;
4892 }
4893 while (*startBuf != ')') {
4894 buf += *startBuf;
4895 startBuf++;
4896 OrigLength++;
4897 }
4898 buf += ')';
4899 OrigLength++;
4900
4901 if (PointerTypeTakesAnyBlockArguments(QT: DeclT) ||
4902 PointerTypeTakesAnyObjCQualifiedType(QT: DeclT)) {
4903 // Replace the '^' with '*' for arguments.
4904 // Replace id<P> with id/*<>*/
4905 DeclLoc = ND->getLocation();
4906 startBuf = SM->getCharacterData(SL: DeclLoc);
4907 const char *argListBegin, *argListEnd;
4908 GetExtentOfArgList(Name: startBuf, LParen&: argListBegin, RParen&: argListEnd);
4909 while (argListBegin < argListEnd) {
4910 if (*argListBegin == '^')
4911 buf += '*';
4912 else if (*argListBegin == '<') {
4913 buf += "/*";
4914 buf += *argListBegin++;
4915 OrigLength++;
4916 while (*argListBegin != '>') {
4917 buf += *argListBegin++;
4918 OrigLength++;
4919 }
4920 buf += *argListBegin;
4921 buf += "*/";
4922 }
4923 else
4924 buf += *argListBegin;
4925 argListBegin++;
4926 OrigLength++;
4927 }
4928 buf += ')';
4929 OrigLength++;
4930 }
4931 ReplaceText(Start, OrigLength, Str: buf);
4932}
4933
4934/// SynthesizeByrefCopyDestroyHelper - This routine synthesizes:
4935/// void __Block_byref_id_object_copy(struct Block_byref_id_object *dst,
4936/// struct Block_byref_id_object *src) {
4937/// _Block_object_assign (&_dest->object, _src->object,
4938/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4939/// [|BLOCK_FIELD_IS_WEAK]) // object
4940/// _Block_object_assign(&_dest->object, _src->object,
4941/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4942/// [|BLOCK_FIELD_IS_WEAK]) // block
4943/// }
4944/// And:
4945/// void __Block_byref_id_object_dispose(struct Block_byref_id_object *_src) {
4946/// _Block_object_dispose(_src->object,
4947/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4948/// [|BLOCK_FIELD_IS_WEAK]) // object
4949/// _Block_object_dispose(_src->object,
4950/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4951/// [|BLOCK_FIELD_IS_WEAK]) // block
4952/// }
4953
4954std::string RewriteModernObjC::SynthesizeByrefCopyDestroyHelper(VarDecl *VD,
4955 int flag) {
4956 std::string S;
4957 if (CopyDestroyCache.count(V: flag))
4958 return S;
4959 CopyDestroyCache.insert(V: flag);
4960 S = "static void __Block_byref_id_object_copy_";
4961 S += utostr(X: flag);
4962 S += "(void *dst, void *src) {\n";
4963
4964 // offset into the object pointer is computed as:
4965 // void * + void* + int + int + void* + void *
4966 unsigned IntSize =
4967 static_cast<unsigned>(Context->getTypeSize(T: Context->IntTy));
4968 unsigned VoidPtrSize =
4969 static_cast<unsigned>(Context->getTypeSize(T: Context->VoidPtrTy));
4970
4971 unsigned offset = (VoidPtrSize*4 + IntSize + IntSize)/Context->getCharWidth();
4972 S += " _Block_object_assign((char*)dst + ";
4973 S += utostr(X: offset);
4974 S += ", *(void * *) ((char*)src + ";
4975 S += utostr(X: offset);
4976 S += "), ";
4977 S += utostr(X: flag);
4978 S += ");\n}\n";
4979
4980 S += "static void __Block_byref_id_object_dispose_";
4981 S += utostr(X: flag);
4982 S += "(void *src) {\n";
4983 S += " _Block_object_dispose(*(void * *) ((char*)src + ";
4984 S += utostr(X: offset);
4985 S += "), ";
4986 S += utostr(X: flag);
4987 S += ");\n}\n";
4988 return S;
4989}
4990
4991/// RewriteByRefVar - For each __block typex ND variable this routine transforms
4992/// the declaration into:
4993/// struct __Block_byref_ND {
4994/// void *__isa; // NULL for everything except __weak pointers
4995/// struct __Block_byref_ND *__forwarding;
4996/// int32_t __flags;
4997/// int32_t __size;
4998/// void *__Block_byref_id_object_copy; // If variable is __block ObjC object
4999/// void *__Block_byref_id_object_dispose; // If variable is __block ObjC object
5000/// typex ND;
5001/// };
5002///
5003/// It then replaces declaration of ND variable with:
5004/// struct __Block_byref_ND ND = {__isa=0B, __forwarding=&ND, __flags=some_flag,
5005/// __size=sizeof(struct __Block_byref_ND),
5006/// ND=initializer-if-any};
5007///
5008///
5009void RewriteModernObjC::RewriteByRefVar(VarDecl *ND, bool firstDecl,
5010 bool lastDecl) {
5011 int flag = 0;
5012 int isa = 0;
5013 SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
5014 if (DeclLoc.isInvalid())
5015 // If type location is missing, it is because of missing type (a warning).
5016 // Use variable's location which is good for this case.
5017 DeclLoc = ND->getLocation();
5018 const char *startBuf = SM->getCharacterData(SL: DeclLoc);
5019 SourceLocation X = ND->getEndLoc();
5020 X = SM->getExpansionLoc(Loc: X);
5021 const char *endBuf = SM->getCharacterData(SL: X);
5022 std::string Name(ND->getNameAsString());
5023 std::string ByrefType;
5024 RewriteByRefString(ResultStr&: ByrefType, Name, VD: ND, def: true);
5025 ByrefType += " {\n";
5026 ByrefType += " void *__isa;\n";
5027 RewriteByRefString(ResultStr&: ByrefType, Name, VD: ND);
5028 ByrefType += " *__forwarding;\n";
5029 ByrefType += " int __flags;\n";
5030 ByrefType += " int __size;\n";
5031 // Add void *__Block_byref_id_object_copy;
5032 // void *__Block_byref_id_object_dispose; if needed.
5033 QualType Ty = ND->getType();
5034 bool HasCopyAndDispose = Context->BlockRequiresCopying(Ty, D: ND);
5035 if (HasCopyAndDispose) {
5036 ByrefType += " void (*__Block_byref_id_object_copy)(void*, void*);\n";
5037 ByrefType += " void (*__Block_byref_id_object_dispose)(void*);\n";
5038 }
5039
5040 QualType T = Ty;
5041 (void)convertBlockPointerToFunctionPointer(T);
5042 T.getAsStringInternal(Str&: Name, Policy: Context->getPrintingPolicy());
5043
5044 ByrefType += " " + Name + ";\n";
5045 ByrefType += "};\n";
5046 // Insert this type in global scope. It is needed by helper function.
5047 SourceLocation FunLocStart;
5048 if (CurFunctionDef)
5049 FunLocStart = getFunctionSourceLocation(R&: *this, FD: CurFunctionDef);
5050 else {
5051 assert(CurMethodDef && "RewriteByRefVar - CurMethodDef is null");
5052 FunLocStart = CurMethodDef->getBeginLoc();
5053 }
5054 InsertText(Loc: FunLocStart, Str: ByrefType);
5055
5056 if (Ty.isObjCGCWeak()) {
5057 flag |= BLOCK_FIELD_IS_WEAK;
5058 isa = 1;
5059 }
5060 if (HasCopyAndDispose) {
5061 flag = BLOCK_BYREF_CALLER;
5062 QualType Ty = ND->getType();
5063 // FIXME. Handle __weak variable (BLOCK_FIELD_IS_WEAK) as well.
5064 if (Ty->isBlockPointerType())
5065 flag |= BLOCK_FIELD_IS_BLOCK;
5066 else
5067 flag |= BLOCK_FIELD_IS_OBJECT;
5068 std::string HF = SynthesizeByrefCopyDestroyHelper(VD: ND, flag);
5069 if (!HF.empty())
5070 Preamble += HF;
5071 }
5072
5073 // struct __Block_byref_ND ND =
5074 // {0, &ND, some_flag, __size=sizeof(struct __Block_byref_ND),
5075 // initializer-if-any};
5076 bool hasInit = (ND->getInit() != nullptr);
5077 // FIXME. rewriter does not support __block c++ objects which
5078 // require construction.
5079 if (hasInit)
5080 if (CXXConstructExpr *CExp = dyn_cast<CXXConstructExpr>(Val: ND->getInit())) {
5081 CXXConstructorDecl *CXXDecl = CExp->getConstructor();
5082 if (CXXDecl && CXXDecl->isDefaultConstructor())
5083 hasInit = false;
5084 }
5085
5086 unsigned flags = 0;
5087 if (HasCopyAndDispose)
5088 flags |= BLOCK_HAS_COPY_DISPOSE;
5089 Name = ND->getNameAsString();
5090 ByrefType.clear();
5091 RewriteByRefString(ResultStr&: ByrefType, Name, VD: ND);
5092 std::string ForwardingCastType("(");
5093 ForwardingCastType += ByrefType + " *)";
5094 ByrefType += " " + Name + " = {(void*)";
5095 ByrefType += utostr(X: isa);
5096 ByrefType += "," + ForwardingCastType + "&" + Name + ", ";
5097 ByrefType += utostr(X: flags);
5098 ByrefType += ", ";
5099 ByrefType += "sizeof(";
5100 RewriteByRefString(ResultStr&: ByrefType, Name, VD: ND);
5101 ByrefType += ")";
5102 if (HasCopyAndDispose) {
5103 ByrefType += ", __Block_byref_id_object_copy_";
5104 ByrefType += utostr(X: flag);
5105 ByrefType += ", __Block_byref_id_object_dispose_";
5106 ByrefType += utostr(X: flag);
5107 }
5108
5109 if (!firstDecl) {
5110 // In multiple __block declarations, and for all but 1st declaration,
5111 // find location of the separating comma. This would be start location
5112 // where new text is to be inserted.
5113 DeclLoc = ND->getLocation();
5114 const char *startDeclBuf = SM->getCharacterData(SL: DeclLoc);
5115 const char *commaBuf = startDeclBuf;
5116 while (*commaBuf != ',')
5117 commaBuf--;
5118 assert((*commaBuf == ',') && "RewriteByRefVar: can't find ','");
5119 DeclLoc = DeclLoc.getLocWithOffset(Offset: commaBuf - startDeclBuf);
5120 startBuf = commaBuf;
5121 }
5122
5123 if (!hasInit) {
5124 ByrefType += "};\n";
5125 unsigned nameSize = Name.size();
5126 // for block or function pointer declaration. Name is already
5127 // part of the declaration.
5128 if (Ty->isBlockPointerType() || Ty->isFunctionPointerType())
5129 nameSize = 1;
5130 ReplaceText(Start: DeclLoc, OrigLength: endBuf-startBuf+nameSize, Str: ByrefType);
5131 }
5132 else {
5133 ByrefType += ", ";
5134 SourceLocation startLoc;
5135 Expr *E = ND->getInit();
5136 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(Val: E))
5137 startLoc = ECE->getLParenLoc();
5138 else
5139 startLoc = E->getBeginLoc();
5140 startLoc = SM->getExpansionLoc(Loc: startLoc);
5141 endBuf = SM->getCharacterData(SL: startLoc);
5142 ReplaceText(Start: DeclLoc, OrigLength: endBuf-startBuf, Str: ByrefType);
5143
5144 const char separator = lastDecl ? ';' : ',';
5145 const char *startInitializerBuf = SM->getCharacterData(SL: startLoc);
5146 const char *separatorBuf = strchr(s: startInitializerBuf, c: separator);
5147 assert((*separatorBuf == separator) &&
5148 "RewriteByRefVar: can't find ';' or ','");
5149 SourceLocation separatorLoc =
5150 startLoc.getLocWithOffset(Offset: separatorBuf-startInitializerBuf);
5151
5152 InsertText(Loc: separatorLoc, Str: lastDecl ? "}" : "};\n");
5153 }
5154}
5155
5156void RewriteModernObjC::CollectBlockDeclRefInfo(BlockExpr *Exp) {
5157 // Add initializers for any closure decl refs.
5158 GetBlockDeclRefExprs(S: Exp->getBody());
5159 if (BlockDeclRefs.size()) {
5160 // Unique all "by copy" declarations.
5161 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5162 if (!BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
5163 if (!BlockByCopyDeclsPtrSet.count(Ptr: BlockDeclRefs[i]->getDecl())) {
5164 BlockByCopyDeclsPtrSet.insert(Ptr: BlockDeclRefs[i]->getDecl());
5165 BlockByCopyDecls.push_back(Elt: BlockDeclRefs[i]->getDecl());
5166 }
5167 }
5168 // Unique all "by ref" declarations.
5169 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5170 if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
5171 if (!BlockByRefDeclsPtrSet.count(Ptr: BlockDeclRefs[i]->getDecl())) {
5172 BlockByRefDeclsPtrSet.insert(Ptr: BlockDeclRefs[i]->getDecl());
5173 BlockByRefDecls.push_back(Elt: BlockDeclRefs[i]->getDecl());
5174 }
5175 }
5176 // Find any imported blocks...they will need special attention.
5177 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5178 if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
5179 BlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
5180 BlockDeclRefs[i]->getType()->isBlockPointerType())
5181 ImportedBlockDecls.insert(Ptr: BlockDeclRefs[i]->getDecl());
5182 }
5183}
5184
5185FunctionDecl *RewriteModernObjC::SynthBlockInitFunctionDecl(StringRef name) {
5186 IdentifierInfo *ID = &Context->Idents.get(Name: name);
5187 QualType FType = Context->getFunctionNoProtoType(ResultTy: Context->VoidPtrTy);
5188 return FunctionDecl::Create(C&: *Context, DC: TUDecl, StartLoc: SourceLocation(),
5189 NLoc: SourceLocation(), N: ID, T: FType, TInfo: nullptr, SC: SC_Extern,
5190 UsesFPIntrin: false, isInlineSpecified: false);
5191}
5192
5193Stmt *RewriteModernObjC::SynthBlockInitExpr(BlockExpr *Exp,
5194 const SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs) {
5195 const BlockDecl *block = Exp->getBlockDecl();
5196
5197 Blocks.push_back(Elt: Exp);
5198
5199 CollectBlockDeclRefInfo(Exp);
5200
5201 // Add inner imported variables now used in current block.
5202 int countOfInnerDecls = 0;
5203 if (!InnerBlockDeclRefs.empty()) {
5204 for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++) {
5205 DeclRefExpr *Exp = InnerBlockDeclRefs[i];
5206 ValueDecl *VD = Exp->getDecl();
5207 if (!VD->hasAttr<BlocksAttr>() && !BlockByCopyDeclsPtrSet.count(Ptr: VD)) {
5208 // We need to save the copied-in variables in nested
5209 // blocks because it is needed at the end for some of the API generations.
5210 // See SynthesizeBlockLiterals routine.
5211 InnerDeclRefs.push_back(Elt: Exp); countOfInnerDecls++;
5212 BlockDeclRefs.push_back(Elt: Exp);
5213 BlockByCopyDeclsPtrSet.insert(Ptr: VD);
5214 BlockByCopyDecls.push_back(Elt: VD);
5215 }
5216 if (VD->hasAttr<BlocksAttr>() && !BlockByRefDeclsPtrSet.count(Ptr: VD)) {
5217 InnerDeclRefs.push_back(Elt: Exp); countOfInnerDecls++;
5218 BlockDeclRefs.push_back(Elt: Exp);
5219 BlockByRefDeclsPtrSet.insert(Ptr: VD);
5220 BlockByRefDecls.push_back(Elt: VD);
5221 }
5222 }
5223 // Find any imported blocks...they will need special attention.
5224 for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++)
5225 if (InnerBlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
5226 InnerBlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
5227 InnerBlockDeclRefs[i]->getType()->isBlockPointerType())
5228 ImportedBlockDecls.insert(Ptr: InnerBlockDeclRefs[i]->getDecl());
5229 }
5230 InnerDeclRefsCount.push_back(Elt: countOfInnerDecls);
5231
5232 std::string FuncName;
5233
5234 if (CurFunctionDef)
5235 FuncName = CurFunctionDef->getNameAsString();
5236 else if (CurMethodDef)
5237 BuildUniqueMethodName(Name&: FuncName, MD: CurMethodDef);
5238 else if (GlobalVarDecl)
5239 FuncName = std::string(GlobalVarDecl->getNameAsString());
5240
5241 bool GlobalBlockExpr =
5242 block->getDeclContext()->getRedeclContext()->isFileContext();
5243
5244 if (GlobalBlockExpr && !GlobalVarDecl) {
5245 Diags.Report(Loc: block->getLocation(), DiagID: GlobalBlockRewriteFailedDiag);
5246 GlobalBlockExpr = false;
5247 }
5248
5249 std::string BlockNumber = utostr(X: Blocks.size()-1);
5250
5251 std::string Func = "__" + FuncName + "_block_func_" + BlockNumber;
5252
5253 // Get a pointer to the function type so we can cast appropriately.
5254 QualType BFT = convertFunctionTypeOfBlocks(FT: Exp->getFunctionType());
5255 QualType FType = Context->getPointerType(T: BFT);
5256
5257 FunctionDecl *FD;
5258 Expr *NewRep;
5259
5260 // Simulate a constructor call...
5261 std::string Tag;
5262
5263 if (GlobalBlockExpr)
5264 Tag = "__global_";
5265 else
5266 Tag = "__";
5267 Tag += FuncName + "_block_impl_" + BlockNumber;
5268
5269 FD = SynthBlockInitFunctionDecl(name: Tag);
5270 DeclRefExpr *DRE = new (Context)
5271 DeclRefExpr(*Context, FD, false, FType, VK_PRValue, SourceLocation());
5272
5273 SmallVector<Expr*, 4> InitExprs;
5274
5275 // Initialize the block function.
5276 FD = SynthBlockInitFunctionDecl(name: Func);
5277 DeclRefExpr *Arg = new (Context) DeclRefExpr(
5278 *Context, FD, false, FD->getType(), VK_LValue, SourceLocation());
5279 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: Context->VoidPtrTy,
5280 Kind: CK_BitCast, E: Arg);
5281 InitExprs.push_back(Elt: castExpr);
5282
5283 // Initialize the block descriptor.
5284 std::string DescData = "__" + FuncName + "_block_desc_" + BlockNumber + "_DATA";
5285
5286 VarDecl *NewVD = VarDecl::Create(
5287 C&: *Context, DC: TUDecl, StartLoc: SourceLocation(), IdLoc: SourceLocation(),
5288 Id: &Context->Idents.get(Name: DescData), T: Context->VoidPtrTy, TInfo: nullptr, S: SC_Static);
5289 UnaryOperator *DescRefExpr = UnaryOperator::Create(
5290 C: const_cast<ASTContext &>(*Context),
5291 input: new (Context) DeclRefExpr(*Context, NewVD, false, Context->VoidPtrTy,
5292 VK_LValue, SourceLocation()),
5293 opc: UO_AddrOf, type: Context->getPointerType(T: Context->VoidPtrTy), VK: VK_PRValue,
5294 OK: OK_Ordinary, l: SourceLocation(), CanOverflow: false, FPFeatures: FPOptionsOverride());
5295 InitExprs.push_back(Elt: DescRefExpr);
5296
5297 // Add initializers for any closure decl refs.
5298 if (BlockDeclRefs.size()) {
5299 Expr *Exp;
5300 // Output all "by copy" declarations.
5301 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
5302 E = BlockByCopyDecls.end(); I != E; ++I) {
5303 if (isObjCType(T: (*I)->getType())) {
5304 // FIXME: Conform to ABI ([[obj retain] autorelease]).
5305 FD = SynthBlockInitFunctionDecl(name: (*I)->getName());
5306 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5307 VK_LValue, SourceLocation());
5308 if (HasLocalVariableExternalStorage(VD: *I)) {
5309 QualType QT = (*I)->getType();
5310 QT = Context->getPointerType(T: QT);
5311 Exp = UnaryOperator::Create(C: const_cast<ASTContext &>(*Context), input: Exp,
5312 opc: UO_AddrOf, type: QT, VK: VK_PRValue, OK: OK_Ordinary,
5313 l: SourceLocation(), CanOverflow: false,
5314 FPFeatures: FPOptionsOverride());
5315 }
5316 } else if (isTopLevelBlockPointerType(T: (*I)->getType())) {
5317 FD = SynthBlockInitFunctionDecl(name: (*I)->getName());
5318 Arg = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5319 VK_LValue, SourceLocation());
5320 Exp = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: Context->VoidPtrTy,
5321 Kind: CK_BitCast, E: Arg);
5322 } else {
5323 FD = SynthBlockInitFunctionDecl(name: (*I)->getName());
5324 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5325 VK_LValue, SourceLocation());
5326 if (HasLocalVariableExternalStorage(VD: *I)) {
5327 QualType QT = (*I)->getType();
5328 QT = Context->getPointerType(T: QT);
5329 Exp = UnaryOperator::Create(C: const_cast<ASTContext &>(*Context), input: Exp,
5330 opc: UO_AddrOf, type: QT, VK: VK_PRValue, OK: OK_Ordinary,
5331 l: SourceLocation(), CanOverflow: false,
5332 FPFeatures: FPOptionsOverride());
5333 }
5334
5335 }
5336 InitExprs.push_back(Elt: Exp);
5337 }
5338 // Output all "by ref" declarations.
5339 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
5340 E = BlockByRefDecls.end(); I != E; ++I) {
5341 ValueDecl *ND = (*I);
5342 std::string Name(ND->getNameAsString());
5343 std::string RecName;
5344 RewriteByRefString(ResultStr&: RecName, Name, VD: ND, def: true);
5345 IdentifierInfo *II = &Context->Idents.get(Name: RecName.c_str()
5346 + sizeof("struct"));
5347 RecordDecl *RD =
5348 RecordDecl::Create(C: *Context, TK: TagTypeKind::Struct, DC: TUDecl,
5349 StartLoc: SourceLocation(), IdLoc: SourceLocation(), Id: II);
5350 assert(RD && "SynthBlockInitExpr(): Can't find RecordDecl");
5351 QualType castT = Context->getPointerType(T: Context->getTagDeclType(Decl: RD));
5352
5353 FD = SynthBlockInitFunctionDecl(name: (*I)->getName());
5354 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5355 VK_LValue, SourceLocation());
5356 bool isNestedCapturedVar = false;
5357 for (const auto &CI : block->captures()) {
5358 const VarDecl *variable = CI.getVariable();
5359 if (variable == ND && CI.isNested()) {
5360 assert(CI.isByRef() &&
5361 "SynthBlockInitExpr - captured block variable is not byref");
5362 isNestedCapturedVar = true;
5363 break;
5364 }
5365 }
5366 // captured nested byref variable has its address passed. Do not take
5367 // its address again.
5368 if (!isNestedCapturedVar)
5369 Exp = UnaryOperator::Create(
5370 C: const_cast<ASTContext &>(*Context), input: Exp, opc: UO_AddrOf,
5371 type: Context->getPointerType(T: Exp->getType()), VK: VK_PRValue, OK: OK_Ordinary,
5372 l: SourceLocation(), CanOverflow: false, FPFeatures: FPOptionsOverride());
5373 Exp = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: castT, Kind: CK_BitCast, E: Exp);
5374 InitExprs.push_back(Elt: Exp);
5375 }
5376 }
5377 if (ImportedBlockDecls.size()) {
5378 // generate BLOCK_HAS_COPY_DISPOSE(have helper funcs) | BLOCK_HAS_DESCRIPTOR
5379 int flag = (BLOCK_HAS_COPY_DISPOSE | BLOCK_HAS_DESCRIPTOR);
5380 unsigned IntSize =
5381 static_cast<unsigned>(Context->getTypeSize(T: Context->IntTy));
5382 Expr *FlagExp = IntegerLiteral::Create(C: *Context, V: llvm::APInt(IntSize, flag),
5383 type: Context->IntTy, l: SourceLocation());
5384 InitExprs.push_back(Elt: FlagExp);
5385 }
5386 NewRep = CallExpr::Create(Ctx: *Context, Fn: DRE, Args: InitExprs, Ty: FType, VK: VK_LValue,
5387 RParenLoc: SourceLocation(), FPFeatures: FPOptionsOverride());
5388
5389 if (GlobalBlockExpr) {
5390 assert (!GlobalConstructionExp &&
5391 "SynthBlockInitExpr - GlobalConstructionExp must be null");
5392 GlobalConstructionExp = NewRep;
5393 NewRep = DRE;
5394 }
5395
5396 NewRep = UnaryOperator::Create(
5397 C: const_cast<ASTContext &>(*Context), input: NewRep, opc: UO_AddrOf,
5398 type: Context->getPointerType(T: NewRep->getType()), VK: VK_PRValue, OK: OK_Ordinary,
5399 l: SourceLocation(), CanOverflow: false, FPFeatures: FPOptionsOverride());
5400 NewRep = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: FType, Kind: CK_BitCast,
5401 E: NewRep);
5402 // Put Paren around the call.
5403 NewRep = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
5404 NewRep);
5405
5406 BlockDeclRefs.clear();
5407 BlockByRefDecls.clear();
5408 BlockByRefDeclsPtrSet.clear();
5409 BlockByCopyDecls.clear();
5410 BlockByCopyDeclsPtrSet.clear();
5411 ImportedBlockDecls.clear();
5412 return NewRep;
5413}
5414
5415bool RewriteModernObjC::IsDeclStmtInForeachHeader(DeclStmt *DS) {
5416 if (const ObjCForCollectionStmt * CS =
5417 dyn_cast<ObjCForCollectionStmt>(Val: Stmts.back()))
5418 return CS->getElement() == DS;
5419 return false;
5420}
5421
5422//===----------------------------------------------------------------------===//
5423// Function Body / Expression rewriting
5424//===----------------------------------------------------------------------===//
5425
5426Stmt *RewriteModernObjC::RewriteFunctionBodyOrGlobalInitializer(Stmt *S) {
5427 if (isa<SwitchStmt>(Val: S) || isa<WhileStmt>(Val: S) ||
5428 isa<DoStmt>(Val: S) || isa<ForStmt>(Val: S))
5429 Stmts.push_back(Elt: S);
5430 else if (isa<ObjCForCollectionStmt>(Val: S)) {
5431 Stmts.push_back(Elt: S);
5432 ObjCBcLabelNo.push_back(Elt: ++BcLabelCount);
5433 }
5434
5435 // Pseudo-object operations and ivar references need special
5436 // treatment because we're going to recursively rewrite them.
5437 if (PseudoObjectExpr *PseudoOp = dyn_cast<PseudoObjectExpr>(Val: S)) {
5438 if (isa<BinaryOperator>(Val: PseudoOp->getSyntacticForm())) {
5439 return RewritePropertyOrImplicitSetter(PseudoOp);
5440 } else {
5441 return RewritePropertyOrImplicitGetter(PseudoOp);
5442 }
5443 } else if (ObjCIvarRefExpr *IvarRefExpr = dyn_cast<ObjCIvarRefExpr>(Val: S)) {
5444 return RewriteObjCIvarRefExpr(IV: IvarRefExpr);
5445 }
5446 else if (isa<OpaqueValueExpr>(Val: S))
5447 S = cast<OpaqueValueExpr>(Val: S)->getSourceExpr();
5448
5449 SourceRange OrigStmtRange = S->getSourceRange();
5450
5451 // Perform a bottom up rewrite of all children.
5452 for (Stmt *&childStmt : S->children())
5453 if (childStmt) {
5454 Stmt *newStmt = RewriteFunctionBodyOrGlobalInitializer(S: childStmt);
5455 if (newStmt) {
5456 childStmt = newStmt;
5457 }
5458 }
5459
5460 if (BlockExpr *BE = dyn_cast<BlockExpr>(Val: S)) {
5461 SmallVector<DeclRefExpr *, 8> InnerBlockDeclRefs;
5462 llvm::SmallPtrSet<const DeclContext *, 8> InnerContexts;
5463 InnerContexts.insert(Ptr: BE->getBlockDecl());
5464 ImportedLocalExternalDecls.clear();
5465 GetInnerBlockDeclRefExprs(S: BE->getBody(),
5466 InnerBlockDeclRefs, InnerContexts);
5467 // Rewrite the block body in place.
5468 Stmt *SaveCurrentBody = CurrentBody;
5469 CurrentBody = BE->getBody();
5470 PropParentMap = nullptr;
5471 // block literal on rhs of a property-dot-sytax assignment
5472 // must be replaced by its synthesize ast so getRewrittenText
5473 // works as expected. In this case, what actually ends up on RHS
5474 // is the blockTranscribed which is the helper function for the
5475 // block literal; as in: self.c = ^() {[ace ARR];};
5476 bool saveDisableReplaceStmt = DisableReplaceStmt;
5477 DisableReplaceStmt = false;
5478 RewriteFunctionBodyOrGlobalInitializer(S: BE->getBody());
5479 DisableReplaceStmt = saveDisableReplaceStmt;
5480 CurrentBody = SaveCurrentBody;
5481 PropParentMap = nullptr;
5482 ImportedLocalExternalDecls.clear();
5483 // Now we snarf the rewritten text and stash it away for later use.
5484 std::string Str = Rewrite.getRewrittenText(Range: BE->getSourceRange());
5485 RewrittenBlockExprs[BE] = Str;
5486
5487 Stmt *blockTranscribed = SynthBlockInitExpr(Exp: BE, InnerBlockDeclRefs);
5488
5489 //blockTranscribed->dump();
5490 ReplaceStmt(Old: S, New: blockTranscribed);
5491 return blockTranscribed;
5492 }
5493 // Handle specific things.
5494 if (ObjCEncodeExpr *AtEncode = dyn_cast<ObjCEncodeExpr>(Val: S))
5495 return RewriteAtEncode(Exp: AtEncode);
5496
5497 if (ObjCSelectorExpr *AtSelector = dyn_cast<ObjCSelectorExpr>(Val: S))
5498 return RewriteAtSelector(Exp: AtSelector);
5499
5500 if (ObjCStringLiteral *AtString = dyn_cast<ObjCStringLiteral>(Val: S))
5501 return RewriteObjCStringLiteral(Exp: AtString);
5502
5503 if (ObjCBoolLiteralExpr *BoolLitExpr = dyn_cast<ObjCBoolLiteralExpr>(Val: S))
5504 return RewriteObjCBoolLiteralExpr(Exp: BoolLitExpr);
5505
5506 if (ObjCBoxedExpr *BoxedExpr = dyn_cast<ObjCBoxedExpr>(Val: S))
5507 return RewriteObjCBoxedExpr(Exp: BoxedExpr);
5508
5509 if (ObjCArrayLiteral *ArrayLitExpr = dyn_cast<ObjCArrayLiteral>(Val: S))
5510 return RewriteObjCArrayLiteralExpr(Exp: ArrayLitExpr);
5511
5512 if (ObjCDictionaryLiteral *DictionaryLitExpr =
5513 dyn_cast<ObjCDictionaryLiteral>(Val: S))
5514 return RewriteObjCDictionaryLiteralExpr(Exp: DictionaryLitExpr);
5515
5516 if (ObjCMessageExpr *MessExpr = dyn_cast<ObjCMessageExpr>(Val: S)) {
5517#if 0
5518 // Before we rewrite it, put the original message expression in a comment.
5519 SourceLocation startLoc = MessExpr->getBeginLoc();
5520 SourceLocation endLoc = MessExpr->getEndLoc();
5521
5522 const char *startBuf = SM->getCharacterData(startLoc);
5523 const char *endBuf = SM->getCharacterData(endLoc);
5524
5525 std::string messString;
5526 messString += "// ";
5527 messString.append(startBuf, endBuf-startBuf+1);
5528 messString += "\n";
5529
5530 // FIXME: Missing definition of
5531 // InsertText(clang::SourceLocation, char const*, unsigned int).
5532 // InsertText(startLoc, messString);
5533 // Tried this, but it didn't work either...
5534 // ReplaceText(startLoc, 0, messString.c_str(), messString.size());
5535#endif
5536 return RewriteMessageExpr(Exp: MessExpr);
5537 }
5538
5539 if (ObjCAutoreleasePoolStmt *StmtAutoRelease =
5540 dyn_cast<ObjCAutoreleasePoolStmt>(Val: S)) {
5541 return RewriteObjCAutoreleasePoolStmt(S: StmtAutoRelease);
5542 }
5543
5544 if (ObjCAtTryStmt *StmtTry = dyn_cast<ObjCAtTryStmt>(Val: S))
5545 return RewriteObjCTryStmt(S: StmtTry);
5546
5547 if (ObjCAtSynchronizedStmt *StmtTry = dyn_cast<ObjCAtSynchronizedStmt>(Val: S))
5548 return RewriteObjCSynchronizedStmt(S: StmtTry);
5549
5550 if (ObjCAtThrowStmt *StmtThrow = dyn_cast<ObjCAtThrowStmt>(Val: S))
5551 return RewriteObjCThrowStmt(S: StmtThrow);
5552
5553 if (ObjCProtocolExpr *ProtocolExp = dyn_cast<ObjCProtocolExpr>(Val: S))
5554 return RewriteObjCProtocolExpr(Exp: ProtocolExp);
5555
5556 if (ObjCForCollectionStmt *StmtForCollection =
5557 dyn_cast<ObjCForCollectionStmt>(Val: S))
5558 return RewriteObjCForCollectionStmt(S: StmtForCollection,
5559 OrigEnd: OrigStmtRange.getEnd());
5560 if (BreakStmt *StmtBreakStmt =
5561 dyn_cast<BreakStmt>(Val: S))
5562 return RewriteBreakStmt(S: StmtBreakStmt);
5563 if (ContinueStmt *StmtContinueStmt =
5564 dyn_cast<ContinueStmt>(Val: S))
5565 return RewriteContinueStmt(S: StmtContinueStmt);
5566
5567 // Need to check for protocol refs (id <P>, Foo <P> *) in variable decls
5568 // and cast exprs.
5569 if (DeclStmt *DS = dyn_cast<DeclStmt>(Val: S)) {
5570 // FIXME: What we're doing here is modifying the type-specifier that
5571 // precedes the first Decl. In the future the DeclGroup should have
5572 // a separate type-specifier that we can rewrite.
5573 // NOTE: We need to avoid rewriting the DeclStmt if it is within
5574 // the context of an ObjCForCollectionStmt. For example:
5575 // NSArray *someArray;
5576 // for (id <FooProtocol> index in someArray) ;
5577 // This is because RewriteObjCForCollectionStmt() does textual rewriting
5578 // and it depends on the original text locations/positions.
5579 if (Stmts.empty() || !IsDeclStmtInForeachHeader(DS))
5580 RewriteObjCQualifiedInterfaceTypes(Dcl: *DS->decl_begin());
5581
5582 // Blocks rewrite rules.
5583 for (DeclStmt::decl_iterator DI = DS->decl_begin(), DE = DS->decl_end();
5584 DI != DE; ++DI) {
5585 Decl *SD = *DI;
5586 if (ValueDecl *ND = dyn_cast<ValueDecl>(Val: SD)) {
5587 if (isTopLevelBlockPointerType(T: ND->getType()))
5588 RewriteBlockPointerDecl(ND);
5589 else if (ND->getType()->isFunctionPointerType())
5590 CheckFunctionPointerDecl(funcType: ND->getType(), ND);
5591 if (VarDecl *VD = dyn_cast<VarDecl>(Val: SD)) {
5592 if (VD->hasAttr<BlocksAttr>()) {
5593 static unsigned uniqueByrefDeclCount = 0;
5594 assert(!BlockByRefDeclNo.count(ND) &&
5595 "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl");
5596 BlockByRefDeclNo[ND] = uniqueByrefDeclCount++;
5597 RewriteByRefVar(ND: VD, firstDecl: (DI == DS->decl_begin()), lastDecl: ((DI+1) == DE));
5598 }
5599 else
5600 RewriteTypeOfDecl(ND: VD);
5601 }
5602 }
5603 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(Val: SD)) {
5604 if (isTopLevelBlockPointerType(T: TD->getUnderlyingType()))
5605 RewriteBlockPointerDecl(ND: TD);
5606 else if (TD->getUnderlyingType()->isFunctionPointerType())
5607 CheckFunctionPointerDecl(funcType: TD->getUnderlyingType(), ND: TD);
5608 }
5609 }
5610 }
5611
5612 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(Val: S))
5613 RewriteObjCQualifiedInterfaceTypes(E: CE);
5614
5615 if (isa<SwitchStmt>(Val: S) || isa<WhileStmt>(Val: S) ||
5616 isa<DoStmt>(Val: S) || isa<ForStmt>(Val: S)) {
5617 assert(!Stmts.empty() && "Statement stack is empty");
5618 assert ((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) ||
5619 isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back()))
5620 && "Statement stack mismatch");
5621 Stmts.pop_back();
5622 }
5623 // Handle blocks rewriting.
5624 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Val: S)) {
5625 ValueDecl *VD = DRE->getDecl();
5626 if (VD->hasAttr<BlocksAttr>())
5627 return RewriteBlockDeclRefExpr(DeclRefExp: DRE);
5628 if (HasLocalVariableExternalStorage(VD))
5629 return RewriteLocalVariableExternalStorage(DRE);
5630 }
5631
5632 if (CallExpr *CE = dyn_cast<CallExpr>(Val: S)) {
5633 if (CE->getCallee()->getType()->isBlockPointerType()) {
5634 Stmt *BlockCall = SynthesizeBlockCall(Exp: CE, BlockExp: CE->getCallee());
5635 ReplaceStmt(Old: S, New: BlockCall);
5636 return BlockCall;
5637 }
5638 }
5639 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(Val: S)) {
5640 RewriteCastExpr(CE);
5641 }
5642 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(Val: S)) {
5643 RewriteImplicitCastObjCExpr(IC: ICE);
5644 }
5645#if 0
5646
5647 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
5648 CastExpr *Replacement = new (Context) CastExpr(ICE->getType(),
5649 ICE->getSubExpr(),
5650 SourceLocation());
5651 // Get the new text.
5652 std::string SStr;
5653 llvm::raw_string_ostream Buf(SStr);
5654 Replacement->printPretty(Buf);
5655 const std::string &Str = Buf.str();
5656
5657 printf("CAST = %s\n", &Str[0]);
5658 InsertText(ICE->getSubExpr()->getBeginLoc(), Str);
5659 delete S;
5660 return Replacement;
5661 }
5662#endif
5663 // Return this stmt unmodified.
5664 return S;
5665}
5666
5667void RewriteModernObjC::RewriteRecordBody(RecordDecl *RD) {
5668 for (auto *FD : RD->fields()) {
5669 if (isTopLevelBlockPointerType(T: FD->getType()))
5670 RewriteBlockPointerDecl(ND: FD);
5671 if (FD->getType()->isObjCQualifiedIdType() ||
5672 FD->getType()->isObjCQualifiedInterfaceType())
5673 RewriteObjCQualifiedInterfaceTypes(Dcl: FD);
5674 }
5675}
5676
5677/// HandleDeclInMainFile - This is called for each top-level decl defined in the
5678/// main file of the input.
5679void RewriteModernObjC::HandleDeclInMainFile(Decl *D) {
5680 switch (D->getKind()) {
5681 case Decl::Function: {
5682 FunctionDecl *FD = cast<FunctionDecl>(Val: D);
5683 if (FD->isOverloadedOperator())
5684 return;
5685
5686 // Since function prototypes don't have ParmDecl's, we check the function
5687 // prototype. This enables us to rewrite function declarations and
5688 // definitions using the same code.
5689 RewriteBlocksInFunctionProtoType(funcType: FD->getType(), D: FD);
5690
5691 if (!FD->isThisDeclarationADefinition())
5692 break;
5693
5694 // FIXME: If this should support Obj-C++, support CXXTryStmt
5695 if (CompoundStmt *Body = dyn_cast_or_null<CompoundStmt>(Val: FD->getBody())) {
5696 CurFunctionDef = FD;
5697 CurrentBody = Body;
5698 Body =
5699 cast_or_null<CompoundStmt>(Val: RewriteFunctionBodyOrGlobalInitializer(S: Body));
5700 FD->setBody(Body);
5701 CurrentBody = nullptr;
5702 if (PropParentMap) {
5703 delete PropParentMap;
5704 PropParentMap = nullptr;
5705 }
5706 // This synthesizes and inserts the block "impl" struct, invoke function,
5707 // and any copy/dispose helper functions.
5708 InsertBlockLiteralsWithinFunction(FD);
5709 RewriteLineDirective(D);
5710 CurFunctionDef = nullptr;
5711 }
5712 break;
5713 }
5714 case Decl::ObjCMethod: {
5715 ObjCMethodDecl *MD = cast<ObjCMethodDecl>(Val: D);
5716 if (CompoundStmt *Body = MD->getCompoundBody()) {
5717 CurMethodDef = MD;
5718 CurrentBody = Body;
5719 Body =
5720 cast_or_null<CompoundStmt>(Val: RewriteFunctionBodyOrGlobalInitializer(S: Body));
5721 MD->setBody(Body);
5722 CurrentBody = nullptr;
5723 if (PropParentMap) {
5724 delete PropParentMap;
5725 PropParentMap = nullptr;
5726 }
5727 InsertBlockLiteralsWithinMethod(MD);
5728 RewriteLineDirective(D);
5729 CurMethodDef = nullptr;
5730 }
5731 break;
5732 }
5733 case Decl::ObjCImplementation: {
5734 ObjCImplementationDecl *CI = cast<ObjCImplementationDecl>(Val: D);
5735 ClassImplementation.push_back(Elt: CI);
5736 break;
5737 }
5738 case Decl::ObjCCategoryImpl: {
5739 ObjCCategoryImplDecl *CI = cast<ObjCCategoryImplDecl>(Val: D);
5740 CategoryImplementation.push_back(Elt: CI);
5741 break;
5742 }
5743 case Decl::Var: {
5744 VarDecl *VD = cast<VarDecl>(Val: D);
5745 RewriteObjCQualifiedInterfaceTypes(Dcl: VD);
5746 if (isTopLevelBlockPointerType(T: VD->getType()))
5747 RewriteBlockPointerDecl(ND: VD);
5748 else if (VD->getType()->isFunctionPointerType()) {
5749 CheckFunctionPointerDecl(funcType: VD->getType(), ND: VD);
5750 if (VD->getInit()) {
5751 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(Val: VD->getInit())) {
5752 RewriteCastExpr(CE);
5753 }
5754 }
5755 } else if (VD->getType()->isRecordType()) {
5756 RecordDecl *RD = VD->getType()->castAs<RecordType>()->getDecl();
5757 if (RD->isCompleteDefinition())
5758 RewriteRecordBody(RD);
5759 }
5760 if (VD->getInit()) {
5761 GlobalVarDecl = VD;
5762 CurrentBody = VD->getInit();
5763 RewriteFunctionBodyOrGlobalInitializer(S: VD->getInit());
5764 CurrentBody = nullptr;
5765 if (PropParentMap) {
5766 delete PropParentMap;
5767 PropParentMap = nullptr;
5768 }
5769 SynthesizeBlockLiterals(FunLocStart: VD->getTypeSpecStartLoc(), FunName: VD->getName());
5770 GlobalVarDecl = nullptr;
5771
5772 // This is needed for blocks.
5773 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(Val: VD->getInit())) {
5774 RewriteCastExpr(CE);
5775 }
5776 }
5777 break;
5778 }
5779 case Decl::TypeAlias:
5780 case Decl::Typedef: {
5781 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(Val: D)) {
5782 if (isTopLevelBlockPointerType(T: TD->getUnderlyingType()))
5783 RewriteBlockPointerDecl(ND: TD);
5784 else if (TD->getUnderlyingType()->isFunctionPointerType())
5785 CheckFunctionPointerDecl(funcType: TD->getUnderlyingType(), ND: TD);
5786 else
5787 RewriteObjCQualifiedInterfaceTypes(Dcl: TD);
5788 }
5789 break;
5790 }
5791 case Decl::CXXRecord:
5792 case Decl::Record: {
5793 RecordDecl *RD = cast<RecordDecl>(Val: D);
5794 if (RD->isCompleteDefinition())
5795 RewriteRecordBody(RD);
5796 break;
5797 }
5798 default:
5799 break;
5800 }
5801 // Nothing yet.
5802}
5803
5804/// Write_ProtocolExprReferencedMetadata - This routine writer out the
5805/// protocol reference symbols in the for of:
5806/// struct _protocol_t *PROTOCOL_REF = &PROTOCOL_METADATA.
5807static void Write_ProtocolExprReferencedMetadata(ASTContext *Context,
5808 ObjCProtocolDecl *PDecl,
5809 std::string &Result) {
5810 // Also output .objc_protorefs$B section and its meta-data.
5811 if (Context->getLangOpts().MicrosoftExt)
5812 Result += "static ";
5813 Result += "struct _protocol_t *";
5814 Result += "_OBJC_PROTOCOL_REFERENCE_$_";
5815 Result += PDecl->getNameAsString();
5816 Result += " = &";
5817 Result += "_OBJC_PROTOCOL_"; Result += PDecl->getNameAsString();
5818 Result += ";\n";
5819}
5820
5821void RewriteModernObjC::HandleTranslationUnit(ASTContext &C) {
5822 if (Diags.hasErrorOccurred())
5823 return;
5824
5825 RewriteInclude();
5826
5827 for (unsigned i = 0, e = FunctionDefinitionsSeen.size(); i < e; i++) {
5828 // translation of function bodies were postponed until all class and
5829 // their extensions and implementations are seen. This is because, we
5830 // cannot build grouping structs for bitfields until they are all seen.
5831 FunctionDecl *FDecl = FunctionDefinitionsSeen[i];
5832 HandleTopLevelSingleDecl(D: FDecl);
5833 }
5834
5835 // Here's a great place to add any extra declarations that may be needed.
5836 // Write out meta data for each @protocol(<expr>).
5837 for (ObjCProtocolDecl *ProtDecl : ProtocolExprDecls) {
5838 RewriteObjCProtocolMetaData(Protocol: ProtDecl, Result&: Preamble);
5839 Write_ProtocolExprReferencedMetadata(Context, PDecl: ProtDecl, Result&: Preamble);
5840 }
5841
5842 InsertText(Loc: SM->getLocForStartOfFile(FID: MainFileID), Str: Preamble, InsertAfter: false);
5843
5844 if (ClassImplementation.size() || CategoryImplementation.size())
5845 RewriteImplementations();
5846
5847 for (unsigned i = 0, e = ObjCInterfacesSeen.size(); i < e; i++) {
5848 ObjCInterfaceDecl *CDecl = ObjCInterfacesSeen[i];
5849 // Write struct declaration for the class matching its ivar declarations.
5850 // Note that for modern abi, this is postponed until the end of TU
5851 // because class extensions and the implementation might declare their own
5852 // private ivars.
5853 RewriteInterfaceDecl(ClassDecl: CDecl);
5854 }
5855
5856 // Get the buffer corresponding to MainFileID. If we haven't changed it, then
5857 // we are done.
5858 if (const RewriteBuffer *RewriteBuf =
5859 Rewrite.getRewriteBufferFor(FID: MainFileID)) {
5860 //printf("Changed:\n");
5861 *OutFile << std::string(RewriteBuf->begin(), RewriteBuf->end());
5862 } else {
5863 llvm::errs() << "No changes\n";
5864 }
5865
5866 if (ClassImplementation.size() || CategoryImplementation.size() ||
5867 ProtocolExprDecls.size()) {
5868 // Rewrite Objective-c meta data*
5869 std::string ResultStr;
5870 RewriteMetaDataIntoBuffer(Result&: ResultStr);
5871 // Emit metadata.
5872 *OutFile << ResultStr;
5873 }
5874 // Emit ImageInfo;
5875 {
5876 std::string ResultStr;
5877 WriteImageInfo(Result&: ResultStr);
5878 *OutFile << ResultStr;
5879 }
5880 OutFile->flush();
5881}
5882
5883void RewriteModernObjC::Initialize(ASTContext &context) {
5884 InitializeCommon(context);
5885
5886 Preamble += "#ifndef __OBJC2__\n";
5887 Preamble += "#define __OBJC2__\n";
5888 Preamble += "#endif\n";
5889
5890 // declaring objc_selector outside the parameter list removes a silly
5891 // scope related warning...
5892 if (IsHeader)
5893 Preamble = "#pragma once\n";
5894 Preamble += "struct objc_selector; struct objc_class;\n";
5895 Preamble += "struct __rw_objc_super { \n\tstruct objc_object *object; ";
5896 Preamble += "\n\tstruct objc_object *superClass; ";
5897 // Add a constructor for creating temporary objects.
5898 Preamble += "\n\t__rw_objc_super(struct objc_object *o, struct objc_object *s) ";
5899 Preamble += ": object(o), superClass(s) {} ";
5900 Preamble += "\n};\n";
5901
5902 if (LangOpts.MicrosoftExt) {
5903 // Define all sections using syntax that makes sense.
5904 // These are currently generated.
5905 Preamble += "\n#pragma section(\".objc_classlist$B\", long, read, write)\n";
5906 Preamble += "#pragma section(\".objc_catlist$B\", long, read, write)\n";
5907 Preamble += "#pragma section(\".objc_imageinfo$B\", long, read, write)\n";
5908 Preamble += "#pragma section(\".objc_nlclslist$B\", long, read, write)\n";
5909 Preamble += "#pragma section(\".objc_nlcatlist$B\", long, read, write)\n";
5910 // These are generated but not necessary for functionality.
5911 Preamble += "#pragma section(\".cat_cls_meth$B\", long, read, write)\n";
5912 Preamble += "#pragma section(\".inst_meth$B\", long, read, write)\n";
5913 Preamble += "#pragma section(\".cls_meth$B\", long, read, write)\n";
5914 Preamble += "#pragma section(\".objc_ivar$B\", long, read, write)\n";
5915
5916 // These need be generated for performance. Currently they are not,
5917 // using API calls instead.
5918 Preamble += "#pragma section(\".objc_selrefs$B\", long, read, write)\n";
5919 Preamble += "#pragma section(\".objc_classrefs$B\", long, read, write)\n";
5920 Preamble += "#pragma section(\".objc_superrefs$B\", long, read, write)\n";
5921
5922 }
5923 Preamble += "#ifndef _REWRITER_typedef_Protocol\n";
5924 Preamble += "typedef struct objc_object Protocol;\n";
5925 Preamble += "#define _REWRITER_typedef_Protocol\n";
5926 Preamble += "#endif\n";
5927 if (LangOpts.MicrosoftExt) {
5928 Preamble += "#define __OBJC_RW_DLLIMPORT extern \"C\" __declspec(dllimport)\n";
5929 Preamble += "#define __OBJC_RW_STATICIMPORT extern \"C\"\n";
5930 }
5931 else
5932 Preamble += "#define __OBJC_RW_DLLIMPORT extern\n";
5933
5934 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend(void);\n";
5935 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSendSuper(void);\n";
5936 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend_stret(void);\n";
5937 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSendSuper_stret(void);\n";
5938 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend_fpret(void);\n";
5939
5940 Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *objc_getClass";
5941 Preamble += "(const char *);\n";
5942 Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *class_getSuperclass";
5943 Preamble += "(struct objc_class *);\n";
5944 Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *objc_getMetaClass";
5945 Preamble += "(const char *);\n";
5946 Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_throw( struct objc_object *);\n";
5947 // @synchronized hooks.
5948 Preamble += "__OBJC_RW_DLLIMPORT int objc_sync_enter( struct objc_object *);\n";
5949 Preamble += "__OBJC_RW_DLLIMPORT int objc_sync_exit( struct objc_object *);\n";
5950 Preamble += "__OBJC_RW_DLLIMPORT Protocol *objc_getProtocol(const char *);\n";
5951 Preamble += "#ifdef _WIN64\n";
5952 Preamble += "typedef unsigned long long _WIN_NSUInteger;\n";
5953 Preamble += "#else\n";
5954 Preamble += "typedef unsigned int _WIN_NSUInteger;\n";
5955 Preamble += "#endif\n";
5956 Preamble += "#ifndef __FASTENUMERATIONSTATE\n";
5957 Preamble += "struct __objcFastEnumerationState {\n\t";
5958 Preamble += "unsigned long state;\n\t";
5959 Preamble += "void **itemsPtr;\n\t";
5960 Preamble += "unsigned long *mutationsPtr;\n\t";
5961 Preamble += "unsigned long extra[5];\n};\n";
5962 Preamble += "__OBJC_RW_DLLIMPORT void objc_enumerationMutation(struct objc_object *);\n";
5963 Preamble += "#define __FASTENUMERATIONSTATE\n";
5964 Preamble += "#endif\n";
5965 Preamble += "#ifndef __NSCONSTANTSTRINGIMPL\n";
5966 Preamble += "struct __NSConstantStringImpl {\n";
5967 Preamble += " int *isa;\n";
5968 Preamble += " int flags;\n";
5969 Preamble += " char *str;\n";
5970 Preamble += "#if _WIN64\n";
5971 Preamble += " long long length;\n";
5972 Preamble += "#else\n";
5973 Preamble += " long length;\n";
5974 Preamble += "#endif\n";
5975 Preamble += "};\n";
5976 Preamble += "#ifdef CF_EXPORT_CONSTANT_STRING\n";
5977 Preamble += "extern \"C\" __declspec(dllexport) int __CFConstantStringClassReference[];\n";
5978 Preamble += "#else\n";
5979 Preamble += "__OBJC_RW_DLLIMPORT int __CFConstantStringClassReference[];\n";
5980 Preamble += "#endif\n";
5981 Preamble += "#define __NSCONSTANTSTRINGIMPL\n";
5982 Preamble += "#endif\n";
5983 // Blocks preamble.
5984 Preamble += "#ifndef BLOCK_IMPL\n";
5985 Preamble += "#define BLOCK_IMPL\n";
5986 Preamble += "struct __block_impl {\n";
5987 Preamble += " void *isa;\n";
5988 Preamble += " int Flags;\n";
5989 Preamble += " int Reserved;\n";
5990 Preamble += " void *FuncPtr;\n";
5991 Preamble += "};\n";
5992 Preamble += "// Runtime copy/destroy helper functions (from Block_private.h)\n";
5993 Preamble += "#ifdef __OBJC_EXPORT_BLOCKS\n";
5994 Preamble += "extern \"C\" __declspec(dllexport) "
5995 "void _Block_object_assign(void *, const void *, const int);\n";
5996 Preamble += "extern \"C\" __declspec(dllexport) void _Block_object_dispose(const void *, const int);\n";
5997 Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteGlobalBlock[32];\n";
5998 Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteStackBlock[32];\n";
5999 Preamble += "#else\n";
6000 Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_assign(void *, const void *, const int);\n";
6001 Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_dispose(const void *, const int);\n";
6002 Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteGlobalBlock[32];\n";
6003 Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteStackBlock[32];\n";
6004 Preamble += "#endif\n";
6005 Preamble += "#endif\n";
6006 if (LangOpts.MicrosoftExt) {
6007 Preamble += "#undef __OBJC_RW_DLLIMPORT\n";
6008 Preamble += "#undef __OBJC_RW_STATICIMPORT\n";
6009 Preamble += "#ifndef KEEP_ATTRIBUTES\n"; // We use this for clang tests.
6010 Preamble += "#define __attribute__(X)\n";
6011 Preamble += "#endif\n";
6012 Preamble += "#ifndef __weak\n";
6013 Preamble += "#define __weak\n";
6014 Preamble += "#endif\n";
6015 Preamble += "#ifndef __block\n";
6016 Preamble += "#define __block\n";
6017 Preamble += "#endif\n";
6018 }
6019 else {
6020 Preamble += "#define __block\n";
6021 Preamble += "#define __weak\n";
6022 }
6023
6024 // Declarations required for modern objective-c array and dictionary literals.
6025 Preamble += "\n#include <stdarg.h>\n";
6026 Preamble += "struct __NSContainer_literal {\n";
6027 Preamble += " void * *arr;\n";
6028 Preamble += " __NSContainer_literal (unsigned int count, ...) {\n";
6029 Preamble += "\tva_list marker;\n";
6030 Preamble += "\tva_start(marker, count);\n";
6031 Preamble += "\tarr = new void *[count];\n";
6032 Preamble += "\tfor (unsigned i = 0; i < count; i++)\n";
6033 Preamble += "\t arr[i] = va_arg(marker, void *);\n";
6034 Preamble += "\tva_end( marker );\n";
6035 Preamble += " };\n";
6036 Preamble += " ~__NSContainer_literal() {\n";
6037 Preamble += "\tdelete[] arr;\n";
6038 Preamble += " }\n";
6039 Preamble += "};\n";
6040
6041 // Declaration required for implementation of @autoreleasepool statement.
6042 Preamble += "extern \"C\" __declspec(dllimport) void * objc_autoreleasePoolPush(void);\n";
6043 Preamble += "extern \"C\" __declspec(dllimport) void objc_autoreleasePoolPop(void *);\n\n";
6044 Preamble += "struct __AtAutoreleasePool {\n";
6045 Preamble += " __AtAutoreleasePool() {atautoreleasepoolobj = objc_autoreleasePoolPush();}\n";
6046 Preamble += " ~__AtAutoreleasePool() {objc_autoreleasePoolPop(atautoreleasepoolobj);}\n";
6047 Preamble += " void * atautoreleasepoolobj;\n";
6048 Preamble += "};\n";
6049
6050 // NOTE! Windows uses LLP64 for 64bit mode. So, cast pointer to long long
6051 // as this avoids warning in any 64bit/32bit compilation model.
6052 Preamble += "\n#define __OFFSETOFIVAR__(TYPE, MEMBER) ((long long) &((TYPE *)0)->MEMBER)\n";
6053}
6054
6055/// RewriteIvarOffsetComputation - This routine synthesizes computation of
6056/// ivar offset.
6057void RewriteModernObjC::RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
6058 std::string &Result) {
6059 Result += "__OFFSETOFIVAR__(struct ";
6060 Result += ivar->getContainingInterface()->getNameAsString();
6061 if (LangOpts.MicrosoftExt)
6062 Result += "_IMPL";
6063 Result += ", ";
6064 if (ivar->isBitField())
6065 ObjCIvarBitfieldGroupDecl(IV: ivar, Result);
6066 else
6067 Result += ivar->getNameAsString();
6068 Result += ")";
6069}
6070
6071/// WriteModernMetadataDeclarations - Writes out metadata declarations for modern ABI.
6072/// struct _prop_t {
6073/// const char *name;
6074/// char *attributes;
6075/// }
6076
6077/// struct _prop_list_t {
6078/// uint32_t entsize; // sizeof(struct _prop_t)
6079/// uint32_t count_of_properties;
6080/// struct _prop_t prop_list[count_of_properties];
6081/// }
6082
6083/// struct _protocol_t;
6084
6085/// struct _protocol_list_t {
6086/// long protocol_count; // Note, this is 32/64 bit
6087/// struct _protocol_t * protocol_list[protocol_count];
6088/// }
6089
6090/// struct _objc_method {
6091/// SEL _cmd;
6092/// const char *method_type;
6093/// char *_imp;
6094/// }
6095
6096/// struct _method_list_t {
6097/// uint32_t entsize; // sizeof(struct _objc_method)
6098/// uint32_t method_count;
6099/// struct _objc_method method_list[method_count];
6100/// }
6101
6102/// struct _protocol_t {
6103/// id isa; // NULL
6104/// const char *protocol_name;
6105/// const struct _protocol_list_t * protocol_list; // super protocols
6106/// const struct method_list_t *instance_methods;
6107/// const struct method_list_t *class_methods;
6108/// const struct method_list_t *optionalInstanceMethods;
6109/// const struct method_list_t *optionalClassMethods;
6110/// const struct _prop_list_t * properties;
6111/// const uint32_t size; // sizeof(struct _protocol_t)
6112/// const uint32_t flags; // = 0
6113/// const char ** extendedMethodTypes;
6114/// }
6115
6116/// struct _ivar_t {
6117/// unsigned long int *offset; // pointer to ivar offset location
6118/// const char *name;
6119/// const char *type;
6120/// uint32_t alignment;
6121/// uint32_t size;
6122/// }
6123
6124/// struct _ivar_list_t {
6125/// uint32 entsize; // sizeof(struct _ivar_t)
6126/// uint32 count;
6127/// struct _ivar_t list[count];
6128/// }
6129
6130/// struct _class_ro_t {
6131/// uint32_t flags;
6132/// uint32_t instanceStart;
6133/// uint32_t instanceSize;
6134/// uint32_t reserved; // only when building for 64bit targets
6135/// const uint8_t *ivarLayout;
6136/// const char *name;
6137/// const struct _method_list_t *baseMethods;
6138/// const struct _protocol_list_t *baseProtocols;
6139/// const struct _ivar_list_t *ivars;
6140/// const uint8_t *weakIvarLayout;
6141/// const struct _prop_list_t *properties;
6142/// }
6143
6144/// struct _class_t {
6145/// struct _class_t *isa;
6146/// struct _class_t *superclass;
6147/// void *cache;
6148/// IMP *vtable;
6149/// struct _class_ro_t *ro;
6150/// }
6151
6152/// struct _category_t {
6153/// const char *name;
6154/// struct _class_t *cls;
6155/// const struct _method_list_t *instance_methods;
6156/// const struct _method_list_t *class_methods;
6157/// const struct _protocol_list_t *protocols;
6158/// const struct _prop_list_t *properties;
6159/// }
6160
6161/// MessageRefTy - LLVM for:
6162/// struct _message_ref_t {
6163/// IMP messenger;
6164/// SEL name;
6165/// };
6166
6167/// SuperMessageRefTy - LLVM for:
6168/// struct _super_message_ref_t {
6169/// SUPER_IMP messenger;
6170/// SEL name;
6171/// };
6172
6173static void WriteModernMetadataDeclarations(ASTContext *Context, std::string &Result) {
6174 static bool meta_data_declared = false;
6175 if (meta_data_declared)
6176 return;
6177
6178 Result += "\nstruct _prop_t {\n";
6179 Result += "\tconst char *name;\n";
6180 Result += "\tconst char *attributes;\n";
6181 Result += "};\n";
6182
6183 Result += "\nstruct _protocol_t;\n";
6184
6185 Result += "\nstruct _objc_method {\n";
6186 Result += "\tstruct objc_selector * _cmd;\n";
6187 Result += "\tconst char *method_type;\n";
6188 Result += "\tvoid *_imp;\n";
6189 Result += "};\n";
6190
6191 Result += "\nstruct _protocol_t {\n";
6192 Result += "\tvoid * isa; // NULL\n";
6193 Result += "\tconst char *protocol_name;\n";
6194 Result += "\tconst struct _protocol_list_t * protocol_list; // super protocols\n";
6195 Result += "\tconst struct method_list_t *instance_methods;\n";
6196 Result += "\tconst struct method_list_t *class_methods;\n";
6197 Result += "\tconst struct method_list_t *optionalInstanceMethods;\n";
6198 Result += "\tconst struct method_list_t *optionalClassMethods;\n";
6199 Result += "\tconst struct _prop_list_t * properties;\n";
6200 Result += "\tconst unsigned int size; // sizeof(struct _protocol_t)\n";
6201 Result += "\tconst unsigned int flags; // = 0\n";
6202 Result += "\tconst char ** extendedMethodTypes;\n";
6203 Result += "};\n";
6204
6205 Result += "\nstruct _ivar_t {\n";
6206 Result += "\tunsigned long int *offset; // pointer to ivar offset location\n";
6207 Result += "\tconst char *name;\n";
6208 Result += "\tconst char *type;\n";
6209 Result += "\tunsigned int alignment;\n";
6210 Result += "\tunsigned int size;\n";
6211 Result += "};\n";
6212
6213 Result += "\nstruct _class_ro_t {\n";
6214 Result += "\tunsigned int flags;\n";
6215 Result += "\tunsigned int instanceStart;\n";
6216 Result += "\tunsigned int instanceSize;\n";
6217 const llvm::Triple &Triple(Context->getTargetInfo().getTriple());
6218 if (Triple.getArch() == llvm::Triple::x86_64)
6219 Result += "\tunsigned int reserved;\n";
6220 Result += "\tconst unsigned char *ivarLayout;\n";
6221 Result += "\tconst char *name;\n";
6222 Result += "\tconst struct _method_list_t *baseMethods;\n";
6223 Result += "\tconst struct _objc_protocol_list *baseProtocols;\n";
6224 Result += "\tconst struct _ivar_list_t *ivars;\n";
6225 Result += "\tconst unsigned char *weakIvarLayout;\n";
6226 Result += "\tconst struct _prop_list_t *properties;\n";
6227 Result += "};\n";
6228
6229 Result += "\nstruct _class_t {\n";
6230 Result += "\tstruct _class_t *isa;\n";
6231 Result += "\tstruct _class_t *superclass;\n";
6232 Result += "\tvoid *cache;\n";
6233 Result += "\tvoid *vtable;\n";
6234 Result += "\tstruct _class_ro_t *ro;\n";
6235 Result += "};\n";
6236
6237 Result += "\nstruct _category_t {\n";
6238 Result += "\tconst char *name;\n";
6239 Result += "\tstruct _class_t *cls;\n";
6240 Result += "\tconst struct _method_list_t *instance_methods;\n";
6241 Result += "\tconst struct _method_list_t *class_methods;\n";
6242 Result += "\tconst struct _protocol_list_t *protocols;\n";
6243 Result += "\tconst struct _prop_list_t *properties;\n";
6244 Result += "};\n";
6245
6246 Result += "extern \"C\" __declspec(dllimport) struct objc_cache _objc_empty_cache;\n";
6247 Result += "#pragma warning(disable:4273)\n";
6248 meta_data_declared = true;
6249}
6250
6251static void Write_protocol_list_t_TypeDecl(std::string &Result,
6252 long super_protocol_count) {
6253 Result += "struct /*_protocol_list_t*/"; Result += " {\n";
6254 Result += "\tlong protocol_count; // Note, this is 32/64 bit\n";
6255 Result += "\tstruct _protocol_t *super_protocols[";
6256 Result += utostr(X: super_protocol_count); Result += "];\n";
6257 Result += "}";
6258}
6259
6260static void Write_method_list_t_TypeDecl(std::string &Result,
6261 unsigned int method_count) {
6262 Result += "struct /*_method_list_t*/"; Result += " {\n";
6263 Result += "\tunsigned int entsize; // sizeof(struct _objc_method)\n";
6264 Result += "\tunsigned int method_count;\n";
6265 Result += "\tstruct _objc_method method_list[";
6266 Result += utostr(X: method_count); Result += "];\n";
6267 Result += "}";
6268}
6269
6270static void Write__prop_list_t_TypeDecl(std::string &Result,
6271 unsigned int property_count) {
6272 Result += "struct /*_prop_list_t*/"; Result += " {\n";
6273 Result += "\tunsigned int entsize; // sizeof(struct _prop_t)\n";
6274 Result += "\tunsigned int count_of_properties;\n";
6275 Result += "\tstruct _prop_t prop_list[";
6276 Result += utostr(X: property_count); Result += "];\n";
6277 Result += "}";
6278}
6279
6280static void Write__ivar_list_t_TypeDecl(std::string &Result,
6281 unsigned int ivar_count) {
6282 Result += "struct /*_ivar_list_t*/"; Result += " {\n";
6283 Result += "\tunsigned int entsize; // sizeof(struct _prop_t)\n";
6284 Result += "\tunsigned int count;\n";
6285 Result += "\tstruct _ivar_t ivar_list[";
6286 Result += utostr(X: ivar_count); Result += "];\n";
6287 Result += "}";
6288}
6289
6290static void Write_protocol_list_initializer(ASTContext *Context, std::string &Result,
6291 ArrayRef<ObjCProtocolDecl *> SuperProtocols,
6292 StringRef VarName,
6293 StringRef ProtocolName) {
6294 if (SuperProtocols.size() > 0) {
6295 Result += "\nstatic ";
6296 Write_protocol_list_t_TypeDecl(Result, super_protocol_count: SuperProtocols.size());
6297 Result += " "; Result += VarName;
6298 Result += ProtocolName;
6299 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6300 Result += "\t"; Result += utostr(X: SuperProtocols.size()); Result += ",\n";
6301 for (unsigned i = 0, e = SuperProtocols.size(); i < e; i++) {
6302 ObjCProtocolDecl *SuperPD = SuperProtocols[i];
6303 Result += "\t&"; Result += "_OBJC_PROTOCOL_";
6304 Result += SuperPD->getNameAsString();
6305 if (i == e-1)
6306 Result += "\n};\n";
6307 else
6308 Result += ",\n";
6309 }
6310 }
6311}
6312
6313static void Write_method_list_t_initializer(RewriteModernObjC &RewriteObj,
6314 ASTContext *Context, std::string &Result,
6315 ArrayRef<ObjCMethodDecl *> Methods,
6316 StringRef VarName,
6317 StringRef TopLevelDeclName,
6318 bool MethodImpl) {
6319 if (Methods.size() > 0) {
6320 Result += "\nstatic ";
6321 Write_method_list_t_TypeDecl(Result, method_count: Methods.size());
6322 Result += " "; Result += VarName;
6323 Result += TopLevelDeclName;
6324 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6325 Result += "\t"; Result += "sizeof(_objc_method)"; Result += ",\n";
6326 Result += "\t"; Result += utostr(X: Methods.size()); Result += ",\n";
6327 for (unsigned i = 0, e = Methods.size(); i < e; i++) {
6328 ObjCMethodDecl *MD = Methods[i];
6329 if (i == 0)
6330 Result += "\t{{(struct objc_selector *)\"";
6331 else
6332 Result += "\t{(struct objc_selector *)\"";
6333 Result += (MD)->getSelector().getAsString(); Result += "\"";
6334 Result += ", ";
6335 std::string MethodTypeString = Context->getObjCEncodingForMethodDecl(Decl: MD);
6336 Result += "\""; Result += MethodTypeString; Result += "\"";
6337 Result += ", ";
6338 if (!MethodImpl)
6339 Result += "0";
6340 else {
6341 Result += "(void *)";
6342 Result += RewriteObj.MethodInternalNames[MD];
6343 }
6344 if (i == e-1)
6345 Result += "}}\n";
6346 else
6347 Result += "},\n";
6348 }
6349 Result += "};\n";
6350 }
6351}
6352
6353static void Write_prop_list_t_initializer(RewriteModernObjC &RewriteObj,
6354 ASTContext *Context, std::string &Result,
6355 ArrayRef<ObjCPropertyDecl *> Properties,
6356 const Decl *Container,
6357 StringRef VarName,
6358 StringRef ProtocolName) {
6359 if (Properties.size() > 0) {
6360 Result += "\nstatic ";
6361 Write__prop_list_t_TypeDecl(Result, property_count: Properties.size());
6362 Result += " "; Result += VarName;
6363 Result += ProtocolName;
6364 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6365 Result += "\t"; Result += "sizeof(_prop_t)"; Result += ",\n";
6366 Result += "\t"; Result += utostr(X: Properties.size()); Result += ",\n";
6367 for (unsigned i = 0, e = Properties.size(); i < e; i++) {
6368 ObjCPropertyDecl *PropDecl = Properties[i];
6369 if (i == 0)
6370 Result += "\t{{\"";
6371 else
6372 Result += "\t{\"";
6373 Result += PropDecl->getName(); Result += "\",";
6374 std::string PropertyTypeString =
6375 Context->getObjCEncodingForPropertyDecl(PD: PropDecl, Container);
6376 std::string QuotePropertyTypeString;
6377 RewriteObj.QuoteDoublequotes(From&: PropertyTypeString, To&: QuotePropertyTypeString);
6378 Result += "\""; Result += QuotePropertyTypeString; Result += "\"";
6379 if (i == e-1)
6380 Result += "}}\n";
6381 else
6382 Result += "},\n";
6383 }
6384 Result += "};\n";
6385 }
6386}
6387
6388// Metadata flags
6389enum MetaDataDlags {
6390 CLS = 0x0,
6391 CLS_META = 0x1,
6392 CLS_ROOT = 0x2,
6393 OBJC2_CLS_HIDDEN = 0x10,
6394 CLS_EXCEPTION = 0x20,
6395
6396 /// (Obsolete) ARC-specific: this class has a .release_ivars method
6397 CLS_HAS_IVAR_RELEASER = 0x40,
6398 /// class was compiled with -fobjc-arr
6399 CLS_COMPILED_BY_ARC = 0x80 // (1<<7)
6400};
6401
6402static void Write__class_ro_t_initializer(ASTContext *Context, std::string &Result,
6403 unsigned int flags,
6404 const std::string &InstanceStart,
6405 const std::string &InstanceSize,
6406 ArrayRef<ObjCMethodDecl *>baseMethods,
6407 ArrayRef<ObjCProtocolDecl *>baseProtocols,
6408 ArrayRef<ObjCIvarDecl *>ivars,
6409 ArrayRef<ObjCPropertyDecl *>Properties,
6410 StringRef VarName,
6411 StringRef ClassName) {
6412 Result += "\nstatic struct _class_ro_t ";
6413 Result += VarName; Result += ClassName;
6414 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6415 Result += "\t";
6416 Result += llvm::utostr(X: flags); Result += ", ";
6417 Result += InstanceStart; Result += ", ";
6418 Result += InstanceSize; Result += ", \n";
6419 Result += "\t";
6420 const llvm::Triple &Triple(Context->getTargetInfo().getTriple());
6421 if (Triple.getArch() == llvm::Triple::x86_64)
6422 // uint32_t const reserved; // only when building for 64bit targets
6423 Result += "(unsigned int)0, \n\t";
6424 // const uint8_t * const ivarLayout;
6425 Result += "0, \n\t";
6426 Result += "\""; Result += ClassName; Result += "\",\n\t";
6427 bool metaclass = ((flags & CLS_META) != 0);
6428 if (baseMethods.size() > 0) {
6429 Result += "(const struct _method_list_t *)&";
6430 if (metaclass)
6431 Result += "_OBJC_$_CLASS_METHODS_";
6432 else
6433 Result += "_OBJC_$_INSTANCE_METHODS_";
6434 Result += ClassName;
6435 Result += ",\n\t";
6436 }
6437 else
6438 Result += "0, \n\t";
6439
6440 if (!metaclass && baseProtocols.size() > 0) {
6441 Result += "(const struct _objc_protocol_list *)&";
6442 Result += "_OBJC_CLASS_PROTOCOLS_$_"; Result += ClassName;
6443 Result += ",\n\t";
6444 }
6445 else
6446 Result += "0, \n\t";
6447
6448 if (!metaclass && ivars.size() > 0) {
6449 Result += "(const struct _ivar_list_t *)&";
6450 Result += "_OBJC_$_INSTANCE_VARIABLES_"; Result += ClassName;
6451 Result += ",\n\t";
6452 }
6453 else
6454 Result += "0, \n\t";
6455
6456 // weakIvarLayout
6457 Result += "0, \n\t";
6458 if (!metaclass && Properties.size() > 0) {
6459 Result += "(const struct _prop_list_t *)&";
6460 Result += "_OBJC_$_PROP_LIST_"; Result += ClassName;
6461 Result += ",\n";
6462 }
6463 else
6464 Result += "0, \n";
6465
6466 Result += "};\n";
6467}
6468
6469static void Write_class_t(ASTContext *Context, std::string &Result,
6470 StringRef VarName,
6471 const ObjCInterfaceDecl *CDecl, bool metaclass) {
6472 bool rootClass = (!CDecl->getSuperClass());
6473 const ObjCInterfaceDecl *RootClass = CDecl;
6474
6475 if (!rootClass) {
6476 // Find the Root class
6477 RootClass = CDecl->getSuperClass();
6478 while (RootClass->getSuperClass()) {
6479 RootClass = RootClass->getSuperClass();
6480 }
6481 }
6482
6483 if (metaclass && rootClass) {
6484 // Need to handle a case of use of forward declaration.
6485 Result += "\n";
6486 Result += "extern \"C\" ";
6487 if (CDecl->getImplementation())
6488 Result += "__declspec(dllexport) ";
6489 else
6490 Result += "__declspec(dllimport) ";
6491
6492 Result += "struct _class_t OBJC_CLASS_$_";
6493 Result += CDecl->getNameAsString();
6494 Result += ";\n";
6495 }
6496 // Also, for possibility of 'super' metadata class not having been defined yet.
6497 if (!rootClass) {
6498 ObjCInterfaceDecl *SuperClass = CDecl->getSuperClass();
6499 Result += "\n";
6500 Result += "extern \"C\" ";
6501 if (SuperClass->getImplementation())
6502 Result += "__declspec(dllexport) ";
6503 else
6504 Result += "__declspec(dllimport) ";
6505
6506 Result += "struct _class_t ";
6507 Result += VarName;
6508 Result += SuperClass->getNameAsString();
6509 Result += ";\n";
6510
6511 if (metaclass && RootClass != SuperClass) {
6512 Result += "extern \"C\" ";
6513 if (RootClass->getImplementation())
6514 Result += "__declspec(dllexport) ";
6515 else
6516 Result += "__declspec(dllimport) ";
6517
6518 Result += "struct _class_t ";
6519 Result += VarName;
6520 Result += RootClass->getNameAsString();
6521 Result += ";\n";
6522 }
6523 }
6524
6525 Result += "\nextern \"C\" __declspec(dllexport) struct _class_t ";
6526 Result += VarName; Result += CDecl->getNameAsString();
6527 Result += " __attribute__ ((used, section (\"__DATA,__objc_data\"))) = {\n";
6528 Result += "\t";
6529 if (metaclass) {
6530 if (!rootClass) {
6531 Result += "0, // &"; Result += VarName;
6532 Result += RootClass->getNameAsString();
6533 Result += ",\n\t";
6534 Result += "0, // &"; Result += VarName;
6535 Result += CDecl->getSuperClass()->getNameAsString();
6536 Result += ",\n\t";
6537 }
6538 else {
6539 Result += "0, // &"; Result += VarName;
6540 Result += CDecl->getNameAsString();
6541 Result += ",\n\t";
6542 Result += "0, // &OBJC_CLASS_$_"; Result += CDecl->getNameAsString();
6543 Result += ",\n\t";
6544 }
6545 }
6546 else {
6547 Result += "0, // &OBJC_METACLASS_$_";
6548 Result += CDecl->getNameAsString();
6549 Result += ",\n\t";
6550 if (!rootClass) {
6551 Result += "0, // &"; Result += VarName;
6552 Result += CDecl->getSuperClass()->getNameAsString();
6553 Result += ",\n\t";
6554 }
6555 else
6556 Result += "0,\n\t";
6557 }
6558 Result += "0, // (void *)&_objc_empty_cache,\n\t";
6559 Result += "0, // unused, was (void *)&_objc_empty_vtable,\n\t";
6560 if (metaclass)
6561 Result += "&_OBJC_METACLASS_RO_$_";
6562 else
6563 Result += "&_OBJC_CLASS_RO_$_";
6564 Result += CDecl->getNameAsString();
6565 Result += ",\n};\n";
6566
6567 // Add static function to initialize some of the meta-data fields.
6568 // avoid doing it twice.
6569 if (metaclass)
6570 return;
6571
6572 const ObjCInterfaceDecl *SuperClass =
6573 rootClass ? CDecl : CDecl->getSuperClass();
6574
6575 Result += "static void OBJC_CLASS_SETUP_$_";
6576 Result += CDecl->getNameAsString();
6577 Result += "(void ) {\n";
6578 Result += "\tOBJC_METACLASS_$_"; Result += CDecl->getNameAsString();
6579 Result += ".isa = "; Result += "&OBJC_METACLASS_$_";
6580 Result += RootClass->getNameAsString(); Result += ";\n";
6581
6582 Result += "\tOBJC_METACLASS_$_"; Result += CDecl->getNameAsString();
6583 Result += ".superclass = ";
6584 if (rootClass)
6585 Result += "&OBJC_CLASS_$_";
6586 else
6587 Result += "&OBJC_METACLASS_$_";
6588
6589 Result += SuperClass->getNameAsString(); Result += ";\n";
6590
6591 Result += "\tOBJC_METACLASS_$_"; Result += CDecl->getNameAsString();
6592 Result += ".cache = "; Result += "&_objc_empty_cache"; Result += ";\n";
6593
6594 Result += "\tOBJC_CLASS_$_"; Result += CDecl->getNameAsString();
6595 Result += ".isa = "; Result += "&OBJC_METACLASS_$_";
6596 Result += CDecl->getNameAsString(); Result += ";\n";
6597
6598 if (!rootClass) {
6599 Result += "\tOBJC_CLASS_$_"; Result += CDecl->getNameAsString();
6600 Result += ".superclass = "; Result += "&OBJC_CLASS_$_";
6601 Result += SuperClass->getNameAsString(); Result += ";\n";
6602 }
6603
6604 Result += "\tOBJC_CLASS_$_"; Result += CDecl->getNameAsString();
6605 Result += ".cache = "; Result += "&_objc_empty_cache"; Result += ";\n";
6606 Result += "}\n";
6607}
6608
6609static void Write_category_t(RewriteModernObjC &RewriteObj, ASTContext *Context,
6610 std::string &Result,
6611 ObjCCategoryDecl *CatDecl,
6612 ObjCInterfaceDecl *ClassDecl,
6613 ArrayRef<ObjCMethodDecl *> InstanceMethods,
6614 ArrayRef<ObjCMethodDecl *> ClassMethods,
6615 ArrayRef<ObjCProtocolDecl *> RefedProtocols,
6616 ArrayRef<ObjCPropertyDecl *> ClassProperties) {
6617 StringRef CatName = CatDecl->getName();
6618 StringRef ClassName = ClassDecl->getName();
6619 // must declare an extern class object in case this class is not implemented
6620 // in this TU.
6621 Result += "\n";
6622 Result += "extern \"C\" ";
6623 if (ClassDecl->getImplementation())
6624 Result += "__declspec(dllexport) ";
6625 else
6626 Result += "__declspec(dllimport) ";
6627
6628 Result += "struct _class_t ";
6629 Result += "OBJC_CLASS_$_"; Result += ClassName;
6630 Result += ";\n";
6631
6632 Result += "\nstatic struct _category_t ";
6633 Result += "_OBJC_$_CATEGORY_";
6634 Result += ClassName; Result += "_$_"; Result += CatName;
6635 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = \n";
6636 Result += "{\n";
6637 Result += "\t\""; Result += ClassName; Result += "\",\n";
6638 Result += "\t0, // &"; Result += "OBJC_CLASS_$_"; Result += ClassName;
6639 Result += ",\n";
6640 if (InstanceMethods.size() > 0) {
6641 Result += "\t(const struct _method_list_t *)&";
6642 Result += "_OBJC_$_CATEGORY_INSTANCE_METHODS_";
6643 Result += ClassName; Result += "_$_"; Result += CatName;
6644 Result += ",\n";
6645 }
6646 else
6647 Result += "\t0,\n";
6648
6649 if (ClassMethods.size() > 0) {
6650 Result += "\t(const struct _method_list_t *)&";
6651 Result += "_OBJC_$_CATEGORY_CLASS_METHODS_";
6652 Result += ClassName; Result += "_$_"; Result += CatName;
6653 Result += ",\n";
6654 }
6655 else
6656 Result += "\t0,\n";
6657
6658 if (RefedProtocols.size() > 0) {
6659 Result += "\t(const struct _protocol_list_t *)&";
6660 Result += "_OBJC_CATEGORY_PROTOCOLS_$_";
6661 Result += ClassName; Result += "_$_"; Result += CatName;
6662 Result += ",\n";
6663 }
6664 else
6665 Result += "\t0,\n";
6666
6667 if (ClassProperties.size() > 0) {
6668 Result += "\t(const struct _prop_list_t *)&"; Result += "_OBJC_$_PROP_LIST_";
6669 Result += ClassName; Result += "_$_"; Result += CatName;
6670 Result += ",\n";
6671 }
6672 else
6673 Result += "\t0,\n";
6674
6675 Result += "};\n";
6676
6677 // Add static function to initialize the class pointer in the category structure.
6678 Result += "static void OBJC_CATEGORY_SETUP_$_";
6679 Result += ClassDecl->getNameAsString();
6680 Result += "_$_";
6681 Result += CatName;
6682 Result += "(void ) {\n";
6683 Result += "\t_OBJC_$_CATEGORY_";
6684 Result += ClassDecl->getNameAsString();
6685 Result += "_$_";
6686 Result += CatName;
6687 Result += ".cls = "; Result += "&OBJC_CLASS_$_"; Result += ClassName;
6688 Result += ";\n}\n";
6689}
6690
6691static void Write__extendedMethodTypes_initializer(RewriteModernObjC &RewriteObj,
6692 ASTContext *Context, std::string &Result,
6693 ArrayRef<ObjCMethodDecl *> Methods,
6694 StringRef VarName,
6695 StringRef ProtocolName) {
6696 if (Methods.size() == 0)
6697 return;
6698
6699 Result += "\nstatic const char *";
6700 Result += VarName; Result += ProtocolName;
6701 Result += " [] __attribute__ ((used, section (\"__DATA,__objc_const\"))) = \n";
6702 Result += "{\n";
6703 for (unsigned i = 0, e = Methods.size(); i < e; i++) {
6704 ObjCMethodDecl *MD = Methods[i];
6705 std::string MethodTypeString =
6706 Context->getObjCEncodingForMethodDecl(Decl: MD, Extended: true);
6707 std::string QuoteMethodTypeString;
6708 RewriteObj.QuoteDoublequotes(From&: MethodTypeString, To&: QuoteMethodTypeString);
6709 Result += "\t\""; Result += QuoteMethodTypeString; Result += "\"";
6710 if (i == e-1)
6711 Result += "\n};\n";
6712 else {
6713 Result += ",\n";
6714 }
6715 }
6716}
6717
6718static void Write_IvarOffsetVar(RewriteModernObjC &RewriteObj,
6719 ASTContext *Context,
6720 std::string &Result,
6721 ArrayRef<ObjCIvarDecl *> Ivars,
6722 ObjCInterfaceDecl *CDecl) {
6723 // FIXME. visibility of offset symbols may have to be set; for Darwin
6724 // this is what happens:
6725 /**
6726 if (Ivar->getAccessControl() == ObjCIvarDecl::Private ||
6727 Ivar->getAccessControl() == ObjCIvarDecl::Package ||
6728 Class->getVisibility() == HiddenVisibility)
6729 Visibility should be: HiddenVisibility;
6730 else
6731 Visibility should be: DefaultVisibility;
6732 */
6733
6734 Result += "\n";
6735 for (unsigned i =0, e = Ivars.size(); i < e; i++) {
6736 ObjCIvarDecl *IvarDecl = Ivars[i];
6737 if (Context->getLangOpts().MicrosoftExt)
6738 Result += "__declspec(allocate(\".objc_ivar$B\")) ";
6739
6740 if (!Context->getLangOpts().MicrosoftExt ||
6741 IvarDecl->getAccessControl() == ObjCIvarDecl::Private ||
6742 IvarDecl->getAccessControl() == ObjCIvarDecl::Package)
6743 Result += "extern \"C\" unsigned long int ";
6744 else
6745 Result += "extern \"C\" __declspec(dllexport) unsigned long int ";
6746 if (Ivars[i]->isBitField())
6747 RewriteObj.ObjCIvarBitfieldGroupOffset(IV: IvarDecl, Result);
6748 else
6749 WriteInternalIvarName(IDecl: CDecl, IvarDecl, Result);
6750 Result += " __attribute__ ((used, section (\"__DATA,__objc_ivar\")))";
6751 Result += " = ";
6752 RewriteObj.RewriteIvarOffsetComputation(ivar: IvarDecl, Result);
6753 Result += ";\n";
6754 if (Ivars[i]->isBitField()) {
6755 // skip over rest of the ivar bitfields.
6756 SKIP_BITFIELDS(i , e, Ivars);
6757 }
6758 }
6759}
6760
6761static void Write__ivar_list_t_initializer(RewriteModernObjC &RewriteObj,
6762 ASTContext *Context, std::string &Result,
6763 ArrayRef<ObjCIvarDecl *> OriginalIvars,
6764 StringRef VarName,
6765 ObjCInterfaceDecl *CDecl) {
6766 if (OriginalIvars.size() > 0) {
6767 Write_IvarOffsetVar(RewriteObj, Context, Result, Ivars: OriginalIvars, CDecl);
6768 SmallVector<ObjCIvarDecl *, 8> Ivars;
6769 // strip off all but the first ivar bitfield from each group of ivars.
6770 // Such ivars in the ivar list table will be replaced by their grouping struct
6771 // 'ivar'.
6772 for (unsigned i = 0, e = OriginalIvars.size(); i < e; i++) {
6773 if (OriginalIvars[i]->isBitField()) {
6774 Ivars.push_back(Elt: OriginalIvars[i]);
6775 // skip over rest of the ivar bitfields.
6776 SKIP_BITFIELDS(i , e, OriginalIvars);
6777 }
6778 else
6779 Ivars.push_back(Elt: OriginalIvars[i]);
6780 }
6781
6782 Result += "\nstatic ";
6783 Write__ivar_list_t_TypeDecl(Result, ivar_count: Ivars.size());
6784 Result += " "; Result += VarName;
6785 Result += CDecl->getNameAsString();
6786 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6787 Result += "\t"; Result += "sizeof(_ivar_t)"; Result += ",\n";
6788 Result += "\t"; Result += utostr(X: Ivars.size()); Result += ",\n";
6789 for (unsigned i =0, e = Ivars.size(); i < e; i++) {
6790 ObjCIvarDecl *IvarDecl = Ivars[i];
6791 if (i == 0)
6792 Result += "\t{{";
6793 else
6794 Result += "\t {";
6795 Result += "(unsigned long int *)&";
6796 if (Ivars[i]->isBitField())
6797 RewriteObj.ObjCIvarBitfieldGroupOffset(IV: IvarDecl, Result);
6798 else
6799 WriteInternalIvarName(IDecl: CDecl, IvarDecl, Result);
6800 Result += ", ";
6801
6802 Result += "\"";
6803 if (Ivars[i]->isBitField())
6804 RewriteObj.ObjCIvarBitfieldGroupDecl(IV: Ivars[i], Result);
6805 else
6806 Result += IvarDecl->getName();
6807 Result += "\", ";
6808
6809 QualType IVQT = IvarDecl->getType();
6810 if (IvarDecl->isBitField())
6811 IVQT = RewriteObj.GetGroupRecordTypeForObjCIvarBitfield(IV: IvarDecl);
6812
6813 std::string IvarTypeString, QuoteIvarTypeString;
6814 Context->getObjCEncodingForType(T: IVQT, S&: IvarTypeString,
6815 Field: IvarDecl);
6816 RewriteObj.QuoteDoublequotes(From&: IvarTypeString, To&: QuoteIvarTypeString);
6817 Result += "\""; Result += QuoteIvarTypeString; Result += "\", ";
6818
6819 // FIXME. this alignment represents the host alignment and need be changed to
6820 // represent the target alignment.
6821 unsigned Align = Context->getTypeAlign(T: IVQT)/8;
6822 Align = llvm::Log2_32(Value: Align);
6823 Result += llvm::utostr(X: Align); Result += ", ";
6824 CharUnits Size = Context->getTypeSizeInChars(T: IVQT);
6825 Result += llvm::utostr(X: Size.getQuantity());
6826 if (i == e-1)
6827 Result += "}}\n";
6828 else
6829 Result += "},\n";
6830 }
6831 Result += "};\n";
6832 }
6833}
6834
6835/// RewriteObjCProtocolMetaData - Rewrite protocols meta-data.
6836void RewriteModernObjC::RewriteObjCProtocolMetaData(ObjCProtocolDecl *PDecl,
6837 std::string &Result) {
6838
6839 // Do not synthesize the protocol more than once.
6840 if (ObjCSynthesizedProtocols.count(Ptr: PDecl->getCanonicalDecl()))
6841 return;
6842 WriteModernMetadataDeclarations(Context, Result);
6843
6844 if (ObjCProtocolDecl *Def = PDecl->getDefinition())
6845 PDecl = Def;
6846 // Must write out all protocol definitions in current qualifier list,
6847 // and in their nested qualifiers before writing out current definition.
6848 for (auto *I : PDecl->protocols())
6849 RewriteObjCProtocolMetaData(PDecl: I, Result);
6850
6851 // Construct method lists.
6852 std::vector<ObjCMethodDecl *> InstanceMethods, ClassMethods;
6853 std::vector<ObjCMethodDecl *> OptInstanceMethods, OptClassMethods;
6854 for (auto *MD : PDecl->instance_methods()) {
6855 if (MD->getImplementationControl() == ObjCImplementationControl::Optional) {
6856 OptInstanceMethods.push_back(x: MD);
6857 } else {
6858 InstanceMethods.push_back(x: MD);
6859 }
6860 }
6861
6862 for (auto *MD : PDecl->class_methods()) {
6863 if (MD->getImplementationControl() == ObjCImplementationControl::Optional) {
6864 OptClassMethods.push_back(x: MD);
6865 } else {
6866 ClassMethods.push_back(x: MD);
6867 }
6868 }
6869 std::vector<ObjCMethodDecl *> AllMethods;
6870 for (unsigned i = 0, e = InstanceMethods.size(); i < e; i++)
6871 AllMethods.push_back(x: InstanceMethods[i]);
6872 for (unsigned i = 0, e = ClassMethods.size(); i < e; i++)
6873 AllMethods.push_back(x: ClassMethods[i]);
6874 for (unsigned i = 0, e = OptInstanceMethods.size(); i < e; i++)
6875 AllMethods.push_back(x: OptInstanceMethods[i]);
6876 for (unsigned i = 0, e = OptClassMethods.size(); i < e; i++)
6877 AllMethods.push_back(x: OptClassMethods[i]);
6878
6879 Write__extendedMethodTypes_initializer(RewriteObj&: *this, Context, Result,
6880 Methods: AllMethods,
6881 VarName: "_OBJC_PROTOCOL_METHOD_TYPES_",
6882 ProtocolName: PDecl->getNameAsString());
6883 // Protocol's super protocol list
6884 SmallVector<ObjCProtocolDecl *, 8> SuperProtocols(PDecl->protocols());
6885 Write_protocol_list_initializer(Context, Result, SuperProtocols,
6886 VarName: "_OBJC_PROTOCOL_REFS_",
6887 ProtocolName: PDecl->getNameAsString());
6888
6889 Write_method_list_t_initializer(RewriteObj&: *this, Context, Result, Methods: InstanceMethods,
6890 VarName: "_OBJC_PROTOCOL_INSTANCE_METHODS_",
6891 TopLevelDeclName: PDecl->getNameAsString(), MethodImpl: false);
6892
6893 Write_method_list_t_initializer(RewriteObj&: *this, Context, Result, Methods: ClassMethods,
6894 VarName: "_OBJC_PROTOCOL_CLASS_METHODS_",
6895 TopLevelDeclName: PDecl->getNameAsString(), MethodImpl: false);
6896
6897 Write_method_list_t_initializer(RewriteObj&: *this, Context, Result, Methods: OptInstanceMethods,
6898 VarName: "_OBJC_PROTOCOL_OPT_INSTANCE_METHODS_",
6899 TopLevelDeclName: PDecl->getNameAsString(), MethodImpl: false);
6900
6901 Write_method_list_t_initializer(RewriteObj&: *this, Context, Result, Methods: OptClassMethods,
6902 VarName: "_OBJC_PROTOCOL_OPT_CLASS_METHODS_",
6903 TopLevelDeclName: PDecl->getNameAsString(), MethodImpl: false);
6904
6905 // Protocol's property metadata.
6906 SmallVector<ObjCPropertyDecl *, 8> ProtocolProperties(
6907 PDecl->instance_properties());
6908 Write_prop_list_t_initializer(RewriteObj&: *this, Context, Result, Properties: ProtocolProperties,
6909 /* Container */nullptr,
6910 VarName: "_OBJC_PROTOCOL_PROPERTIES_",
6911 ProtocolName: PDecl->getNameAsString());
6912
6913 // Writer out root metadata for current protocol: struct _protocol_t
6914 Result += "\n";
6915 if (LangOpts.MicrosoftExt)
6916 Result += "static ";
6917 Result += "struct _protocol_t _OBJC_PROTOCOL_";
6918 Result += PDecl->getNameAsString();
6919 Result += " __attribute__ ((used)) = {\n";
6920 Result += "\t0,\n"; // id is; is null
6921 Result += "\t\""; Result += PDecl->getNameAsString(); Result += "\",\n";
6922 if (SuperProtocols.size() > 0) {
6923 Result += "\t(const struct _protocol_list_t *)&"; Result += "_OBJC_PROTOCOL_REFS_";
6924 Result += PDecl->getNameAsString(); Result += ",\n";
6925 }
6926 else
6927 Result += "\t0,\n";
6928 if (InstanceMethods.size() > 0) {
6929 Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_INSTANCE_METHODS_";
6930 Result += PDecl->getNameAsString(); Result += ",\n";
6931 }
6932 else
6933 Result += "\t0,\n";
6934
6935 if (ClassMethods.size() > 0) {
6936 Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_CLASS_METHODS_";
6937 Result += PDecl->getNameAsString(); Result += ",\n";
6938 }
6939 else
6940 Result += "\t0,\n";
6941
6942 if (OptInstanceMethods.size() > 0) {
6943 Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_OPT_INSTANCE_METHODS_";
6944 Result += PDecl->getNameAsString(); Result += ",\n";
6945 }
6946 else
6947 Result += "\t0,\n";
6948
6949 if (OptClassMethods.size() > 0) {
6950 Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_OPT_CLASS_METHODS_";
6951 Result += PDecl->getNameAsString(); Result += ",\n";
6952 }
6953 else
6954 Result += "\t0,\n";
6955
6956 if (ProtocolProperties.size() > 0) {
6957 Result += "\t(const struct _prop_list_t *)&_OBJC_PROTOCOL_PROPERTIES_";
6958 Result += PDecl->getNameAsString(); Result += ",\n";
6959 }
6960 else
6961 Result += "\t0,\n";
6962
6963 Result += "\t"; Result += "sizeof(_protocol_t)"; Result += ",\n";
6964 Result += "\t0,\n";
6965
6966 if (AllMethods.size() > 0) {
6967 Result += "\t(const char **)&"; Result += "_OBJC_PROTOCOL_METHOD_TYPES_";
6968 Result += PDecl->getNameAsString();
6969 Result += "\n};\n";
6970 }
6971 else
6972 Result += "\t0\n};\n";
6973
6974 if (LangOpts.MicrosoftExt)
6975 Result += "static ";
6976 Result += "struct _protocol_t *";
6977 Result += "_OBJC_LABEL_PROTOCOL_$_"; Result += PDecl->getNameAsString();
6978 Result += " = &_OBJC_PROTOCOL_"; Result += PDecl->getNameAsString();
6979 Result += ";\n";
6980
6981 // Mark this protocol as having been generated.
6982 if (!ObjCSynthesizedProtocols.insert(Ptr: PDecl->getCanonicalDecl()).second)
6983 llvm_unreachable("protocol already synthesized");
6984}
6985
6986/// hasObjCExceptionAttribute - Return true if this class or any super
6987/// class has the __objc_exception__ attribute.
6988/// FIXME. Move this to ASTContext.cpp as it is also used for IRGen.
6989static bool hasObjCExceptionAttribute(ASTContext &Context,
6990 const ObjCInterfaceDecl *OID) {
6991 if (OID->hasAttr<ObjCExceptionAttr>())
6992 return true;
6993 if (const ObjCInterfaceDecl *Super = OID->getSuperClass())
6994 return hasObjCExceptionAttribute(Context, OID: Super);
6995 return false;
6996}
6997
6998void RewriteModernObjC::RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
6999 std::string &Result) {
7000 ObjCInterfaceDecl *CDecl = IDecl->getClassInterface();
7001
7002 // Explicitly declared @interface's are already synthesized.
7003 if (CDecl->isImplicitInterfaceDecl())
7004 assert(false &&
7005 "Legacy implicit interface rewriting not supported in moder abi");
7006
7007 WriteModernMetadataDeclarations(Context, Result);
7008 SmallVector<ObjCIvarDecl *, 8> IVars;
7009
7010 for (ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
7011 IVD; IVD = IVD->getNextIvar()) {
7012 // Ignore unnamed bit-fields.
7013 if (!IVD->getDeclName())
7014 continue;
7015 IVars.push_back(Elt: IVD);
7016 }
7017
7018 Write__ivar_list_t_initializer(RewriteObj&: *this, Context, Result, OriginalIvars: IVars,
7019 VarName: "_OBJC_$_INSTANCE_VARIABLES_",
7020 CDecl);
7021
7022 // Build _objc_method_list for class's instance methods if needed
7023 SmallVector<ObjCMethodDecl *, 32> InstanceMethods(IDecl->instance_methods());
7024
7025 // If any of our property implementations have associated getters or
7026 // setters, produce metadata for them as well.
7027 for (const auto *Prop : IDecl->property_impls()) {
7028 if (Prop->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
7029 continue;
7030 if (!Prop->getPropertyIvarDecl())
7031 continue;
7032 ObjCPropertyDecl *PD = Prop->getPropertyDecl();
7033 if (!PD)
7034 continue;
7035 if (ObjCMethodDecl *Getter = Prop->getGetterMethodDecl())
7036 if (mustSynthesizeSetterGetterMethod(IMP: IDecl, PD, getter: true /*getter*/))
7037 InstanceMethods.push_back(Elt: Getter);
7038 if (PD->isReadOnly())
7039 continue;
7040 if (ObjCMethodDecl *Setter = Prop->getSetterMethodDecl())
7041 if (mustSynthesizeSetterGetterMethod(IMP: IDecl, PD, getter: false /*setter*/))
7042 InstanceMethods.push_back(Elt: Setter);
7043 }
7044
7045 Write_method_list_t_initializer(RewriteObj&: *this, Context, Result, Methods: InstanceMethods,
7046 VarName: "_OBJC_$_INSTANCE_METHODS_",
7047 TopLevelDeclName: IDecl->getNameAsString(), MethodImpl: true);
7048
7049 SmallVector<ObjCMethodDecl *, 32> ClassMethods(IDecl->class_methods());
7050
7051 Write_method_list_t_initializer(RewriteObj&: *this, Context, Result, Methods: ClassMethods,
7052 VarName: "_OBJC_$_CLASS_METHODS_",
7053 TopLevelDeclName: IDecl->getNameAsString(), MethodImpl: true);
7054
7055 // Protocols referenced in class declaration?
7056 // Protocol's super protocol list
7057 std::vector<ObjCProtocolDecl *> RefedProtocols;
7058 const ObjCList<ObjCProtocolDecl> &Protocols = CDecl->getReferencedProtocols();
7059 for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
7060 E = Protocols.end();
7061 I != E; ++I) {
7062 RefedProtocols.push_back(x: *I);
7063 // Must write out all protocol definitions in current qualifier list,
7064 // and in their nested qualifiers before writing out current definition.
7065 RewriteObjCProtocolMetaData(PDecl: *I, Result);
7066 }
7067
7068 Write_protocol_list_initializer(Context, Result,
7069 SuperProtocols: RefedProtocols,
7070 VarName: "_OBJC_CLASS_PROTOCOLS_$_",
7071 ProtocolName: IDecl->getNameAsString());
7072
7073 // Protocol's property metadata.
7074 SmallVector<ObjCPropertyDecl *, 8> ClassProperties(
7075 CDecl->instance_properties());
7076 Write_prop_list_t_initializer(RewriteObj&: *this, Context, Result, Properties: ClassProperties,
7077 /* Container */IDecl,
7078 VarName: "_OBJC_$_PROP_LIST_",
7079 ProtocolName: CDecl->getNameAsString());
7080
7081 // Data for initializing _class_ro_t metaclass meta-data
7082 uint32_t flags = CLS_META;
7083 std::string InstanceSize;
7084 std::string InstanceStart;
7085
7086 bool classIsHidden = CDecl->getVisibility() == HiddenVisibility;
7087 if (classIsHidden)
7088 flags |= OBJC2_CLS_HIDDEN;
7089
7090 if (!CDecl->getSuperClass())
7091 // class is root
7092 flags |= CLS_ROOT;
7093 InstanceSize = "sizeof(struct _class_t)";
7094 InstanceStart = InstanceSize;
7095 Write__class_ro_t_initializer(Context, Result, flags,
7096 InstanceStart, InstanceSize,
7097 baseMethods: ClassMethods,
7098 baseProtocols: nullptr,
7099 ivars: nullptr,
7100 Properties: nullptr,
7101 VarName: "_OBJC_METACLASS_RO_$_",
7102 ClassName: CDecl->getNameAsString());
7103
7104 // Data for initializing _class_ro_t meta-data
7105 flags = CLS;
7106 if (classIsHidden)
7107 flags |= OBJC2_CLS_HIDDEN;
7108
7109 if (hasObjCExceptionAttribute(Context&: *Context, OID: CDecl))
7110 flags |= CLS_EXCEPTION;
7111
7112 if (!CDecl->getSuperClass())
7113 // class is root
7114 flags |= CLS_ROOT;
7115
7116 InstanceSize.clear();
7117 InstanceStart.clear();
7118 if (!ObjCSynthesizedStructs.count(Ptr: CDecl)) {
7119 InstanceSize = "0";
7120 InstanceStart = "0";
7121 }
7122 else {
7123 InstanceSize = "sizeof(struct ";
7124 InstanceSize += CDecl->getNameAsString();
7125 InstanceSize += "_IMPL)";
7126
7127 ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
7128 if (IVD) {
7129 RewriteIvarOffsetComputation(ivar: IVD, Result&: InstanceStart);
7130 }
7131 else
7132 InstanceStart = InstanceSize;
7133 }
7134 Write__class_ro_t_initializer(Context, Result, flags,
7135 InstanceStart, InstanceSize,
7136 baseMethods: InstanceMethods,
7137 baseProtocols: RefedProtocols,
7138 ivars: IVars,
7139 Properties: ClassProperties,
7140 VarName: "_OBJC_CLASS_RO_$_",
7141 ClassName: CDecl->getNameAsString());
7142
7143 Write_class_t(Context, Result,
7144 VarName: "OBJC_METACLASS_$_",
7145 CDecl, /*metaclass*/true);
7146
7147 Write_class_t(Context, Result,
7148 VarName: "OBJC_CLASS_$_",
7149 CDecl, /*metaclass*/false);
7150
7151 if (ImplementationIsNonLazy(OD: IDecl))
7152 DefinedNonLazyClasses.push_back(Elt: CDecl);
7153}
7154
7155void RewriteModernObjC::RewriteClassSetupInitHook(std::string &Result) {
7156 int ClsDefCount = ClassImplementation.size();
7157 if (!ClsDefCount)
7158 return;
7159 Result += "#pragma section(\".objc_inithooks$B\", long, read, write)\n";
7160 Result += "__declspec(allocate(\".objc_inithooks$B\")) ";
7161 Result += "static void *OBJC_CLASS_SETUP[] = {\n";
7162 for (int i = 0; i < ClsDefCount; i++) {
7163 ObjCImplementationDecl *IDecl = ClassImplementation[i];
7164 ObjCInterfaceDecl *CDecl = IDecl->getClassInterface();
7165 Result += "\t(void *)&OBJC_CLASS_SETUP_$_";
7166 Result += CDecl->getName(); Result += ",\n";
7167 }
7168 Result += "};\n";
7169}
7170
7171void RewriteModernObjC::RewriteMetaDataIntoBuffer(std::string &Result) {
7172 int ClsDefCount = ClassImplementation.size();
7173 int CatDefCount = CategoryImplementation.size();
7174
7175 // For each implemented class, write out all its meta data.
7176 for (int i = 0; i < ClsDefCount; i++)
7177 RewriteObjCClassMetaData(IDecl: ClassImplementation[i], Result);
7178
7179 RewriteClassSetupInitHook(Result);
7180
7181 // For each implemented category, write out all its meta data.
7182 for (int i = 0; i < CatDefCount; i++)
7183 RewriteObjCCategoryImplDecl(CDecl: CategoryImplementation[i], Result);
7184
7185 RewriteCategorySetupInitHook(Result);
7186
7187 if (ClsDefCount > 0) {
7188 if (LangOpts.MicrosoftExt)
7189 Result += "__declspec(allocate(\".objc_classlist$B\")) ";
7190 Result += "static struct _class_t *L_OBJC_LABEL_CLASS_$ [";
7191 Result += llvm::utostr(X: ClsDefCount); Result += "]";
7192 Result +=
7193 " __attribute__((used, section (\"__DATA, __objc_classlist,"
7194 "regular,no_dead_strip\")))= {\n";
7195 for (int i = 0; i < ClsDefCount; i++) {
7196 Result += "\t&OBJC_CLASS_$_";
7197 Result += ClassImplementation[i]->getNameAsString();
7198 Result += ",\n";
7199 }
7200 Result += "};\n";
7201
7202 if (!DefinedNonLazyClasses.empty()) {
7203 if (LangOpts.MicrosoftExt)
7204 Result += "__declspec(allocate(\".objc_nlclslist$B\")) \n";
7205 Result += "static struct _class_t *_OBJC_LABEL_NONLAZY_CLASS_$[] = {\n\t";
7206 for (unsigned i = 0, e = DefinedNonLazyClasses.size(); i < e; i++) {
7207 Result += "\t&OBJC_CLASS_$_"; Result += DefinedNonLazyClasses[i]->getNameAsString();
7208 Result += ",\n";
7209 }
7210 Result += "};\n";
7211 }
7212 }
7213
7214 if (CatDefCount > 0) {
7215 if (LangOpts.MicrosoftExt)
7216 Result += "__declspec(allocate(\".objc_catlist$B\")) ";
7217 Result += "static struct _category_t *L_OBJC_LABEL_CATEGORY_$ [";
7218 Result += llvm::utostr(X: CatDefCount); Result += "]";
7219 Result +=
7220 " __attribute__((used, section (\"__DATA, __objc_catlist,"
7221 "regular,no_dead_strip\")))= {\n";
7222 for (int i = 0; i < CatDefCount; i++) {
7223 Result += "\t&_OBJC_$_CATEGORY_";
7224 Result +=
7225 CategoryImplementation[i]->getClassInterface()->getNameAsString();
7226 Result += "_$_";
7227 Result += CategoryImplementation[i]->getNameAsString();
7228 Result += ",\n";
7229 }
7230 Result += "};\n";
7231 }
7232
7233 if (!DefinedNonLazyCategories.empty()) {
7234 if (LangOpts.MicrosoftExt)
7235 Result += "__declspec(allocate(\".objc_nlcatlist$B\")) \n";
7236 Result += "static struct _category_t *_OBJC_LABEL_NONLAZY_CATEGORY_$[] = {\n\t";
7237 for (unsigned i = 0, e = DefinedNonLazyCategories.size(); i < e; i++) {
7238 Result += "\t&_OBJC_$_CATEGORY_";
7239 Result +=
7240 DefinedNonLazyCategories[i]->getClassInterface()->getNameAsString();
7241 Result += "_$_";
7242 Result += DefinedNonLazyCategories[i]->getNameAsString();
7243 Result += ",\n";
7244 }
7245 Result += "};\n";
7246 }
7247}
7248
7249void RewriteModernObjC::WriteImageInfo(std::string &Result) {
7250 if (LangOpts.MicrosoftExt)
7251 Result += "__declspec(allocate(\".objc_imageinfo$B\")) \n";
7252
7253 Result += "static struct IMAGE_INFO { unsigned version; unsigned flag; } ";
7254 // version 0, ObjCABI is 2
7255 Result += "_OBJC_IMAGE_INFO = { 0, 2 };\n";
7256}
7257
7258/// RewriteObjCCategoryImplDecl - Rewrite metadata for each category
7259/// implementation.
7260void RewriteModernObjC::RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *IDecl,
7261 std::string &Result) {
7262 WriteModernMetadataDeclarations(Context, Result);
7263 ObjCInterfaceDecl *ClassDecl = IDecl->getClassInterface();
7264 // Find category declaration for this implementation.
7265 ObjCCategoryDecl *CDecl
7266 = ClassDecl->FindCategoryDeclaration(CategoryId: IDecl->getIdentifier());
7267
7268 std::string FullCategoryName = ClassDecl->getNameAsString();
7269 FullCategoryName += "_$_";
7270 FullCategoryName += CDecl->getNameAsString();
7271
7272 // Build _objc_method_list for class's instance methods if needed
7273 SmallVector<ObjCMethodDecl *, 32> InstanceMethods(IDecl->instance_methods());
7274
7275 // If any of our property implementations have associated getters or
7276 // setters, produce metadata for them as well.
7277 for (const auto *Prop : IDecl->property_impls()) {
7278 if (Prop->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
7279 continue;
7280 if (!Prop->getPropertyIvarDecl())
7281 continue;
7282 ObjCPropertyDecl *PD = Prop->getPropertyDecl();
7283 if (!PD)
7284 continue;
7285 if (ObjCMethodDecl *Getter = Prop->getGetterMethodDecl())
7286 InstanceMethods.push_back(Elt: Getter);
7287 if (PD->isReadOnly())
7288 continue;
7289 if (ObjCMethodDecl *Setter = Prop->getSetterMethodDecl())
7290 InstanceMethods.push_back(Elt: Setter);
7291 }
7292
7293 Write_method_list_t_initializer(RewriteObj&: *this, Context, Result, Methods: InstanceMethods,
7294 VarName: "_OBJC_$_CATEGORY_INSTANCE_METHODS_",
7295 TopLevelDeclName: FullCategoryName, MethodImpl: true);
7296
7297 SmallVector<ObjCMethodDecl *, 32> ClassMethods(IDecl->class_methods());
7298
7299 Write_method_list_t_initializer(RewriteObj&: *this, Context, Result, Methods: ClassMethods,
7300 VarName: "_OBJC_$_CATEGORY_CLASS_METHODS_",
7301 TopLevelDeclName: FullCategoryName, MethodImpl: true);
7302
7303 // Protocols referenced in class declaration?
7304 // Protocol's super protocol list
7305 SmallVector<ObjCProtocolDecl *, 8> RefedProtocols(CDecl->protocols());
7306 for (auto *I : CDecl->protocols())
7307 // Must write out all protocol definitions in current qualifier list,
7308 // and in their nested qualifiers before writing out current definition.
7309 RewriteObjCProtocolMetaData(PDecl: I, Result);
7310
7311 Write_protocol_list_initializer(Context, Result,
7312 SuperProtocols: RefedProtocols,
7313 VarName: "_OBJC_CATEGORY_PROTOCOLS_$_",
7314 ProtocolName: FullCategoryName);
7315
7316 // Protocol's property metadata.
7317 SmallVector<ObjCPropertyDecl *, 8> ClassProperties(
7318 CDecl->instance_properties());
7319 Write_prop_list_t_initializer(RewriteObj&: *this, Context, Result, Properties: ClassProperties,
7320 /* Container */IDecl,
7321 VarName: "_OBJC_$_PROP_LIST_",
7322 ProtocolName: FullCategoryName);
7323
7324 Write_category_t(RewriteObj&: *this, Context, Result,
7325 CatDecl: CDecl,
7326 ClassDecl,
7327 InstanceMethods,
7328 ClassMethods,
7329 RefedProtocols,
7330 ClassProperties);
7331
7332 // Determine if this category is also "non-lazy".
7333 if (ImplementationIsNonLazy(OD: IDecl))
7334 DefinedNonLazyCategories.push_back(Elt: CDecl);
7335}
7336
7337void RewriteModernObjC::RewriteCategorySetupInitHook(std::string &Result) {
7338 int CatDefCount = CategoryImplementation.size();
7339 if (!CatDefCount)
7340 return;
7341 Result += "#pragma section(\".objc_inithooks$B\", long, read, write)\n";
7342 Result += "__declspec(allocate(\".objc_inithooks$B\")) ";
7343 Result += "static void *OBJC_CATEGORY_SETUP[] = {\n";
7344 for (int i = 0; i < CatDefCount; i++) {
7345 ObjCCategoryImplDecl *IDecl = CategoryImplementation[i];
7346 ObjCCategoryDecl *CatDecl= IDecl->getCategoryDecl();
7347 ObjCInterfaceDecl *ClassDecl = IDecl->getClassInterface();
7348 Result += "\t(void *)&OBJC_CATEGORY_SETUP_$_";
7349 Result += ClassDecl->getName();
7350 Result += "_$_";
7351 Result += CatDecl->getName();
7352 Result += ",\n";
7353 }
7354 Result += "};\n";
7355}
7356
7357// RewriteObjCMethodsMetaData - Rewrite methods metadata for instance or
7358/// class methods.
7359template<typename MethodIterator>
7360void RewriteModernObjC::RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
7361 MethodIterator MethodEnd,
7362 bool IsInstanceMethod,
7363 StringRef prefix,
7364 StringRef ClassName,
7365 std::string &Result) {
7366 if (MethodBegin == MethodEnd) return;
7367
7368 if (!objc_impl_method) {
7369 /* struct _objc_method {
7370 SEL _cmd;
7371 char *method_types;
7372 void *_imp;
7373 }
7374 */
7375 Result += "\nstruct _objc_method {\n";
7376 Result += "\tSEL _cmd;\n";
7377 Result += "\tchar *method_types;\n";
7378 Result += "\tvoid *_imp;\n";
7379 Result += "};\n";
7380
7381 objc_impl_method = true;
7382 }
7383
7384 // Build _objc_method_list for class's methods if needed
7385
7386 /* struct {
7387 struct _objc_method_list *next_method;
7388 int method_count;
7389 struct _objc_method method_list[];
7390 }
7391 */
7392 unsigned NumMethods = std::distance(MethodBegin, MethodEnd);
7393 Result += "\n";
7394 if (LangOpts.MicrosoftExt) {
7395 if (IsInstanceMethod)
7396 Result += "__declspec(allocate(\".inst_meth$B\")) ";
7397 else
7398 Result += "__declspec(allocate(\".cls_meth$B\")) ";
7399 }
7400 Result += "static struct {\n";
7401 Result += "\tstruct _objc_method_list *next_method;\n";
7402 Result += "\tint method_count;\n";
7403 Result += "\tstruct _objc_method method_list[";
7404 Result += utostr(X: NumMethods);
7405 Result += "];\n} _OBJC_";
7406 Result += prefix;
7407 Result += IsInstanceMethod ? "INSTANCE" : "CLASS";
7408 Result += "_METHODS_";
7409 Result += ClassName;
7410 Result += " __attribute__ ((used, section (\"__OBJC, __";
7411 Result += IsInstanceMethod ? "inst" : "cls";
7412 Result += "_meth\")))= ";
7413 Result += "{\n\t0, " + utostr(X: NumMethods) + "\n";
7414
7415 Result += "\t,{{(SEL)\"";
7416 Result += (*MethodBegin)->getSelector().getAsString().c_str();
7417 std::string MethodTypeString;
7418 Context->getObjCEncodingForMethodDecl(Decl: *MethodBegin, Extended: MethodTypeString);
7419 Result += "\", \"";
7420 Result += MethodTypeString;
7421 Result += "\", (void *)";
7422 Result += MethodInternalNames[*MethodBegin];
7423 Result += "}\n";
7424 for (++MethodBegin; MethodBegin != MethodEnd; ++MethodBegin) {
7425 Result += "\t ,{(SEL)\"";
7426 Result += (*MethodBegin)->getSelector().getAsString().c_str();
7427 std::string MethodTypeString;
7428 Context->getObjCEncodingForMethodDecl(Decl: *MethodBegin, Extended: MethodTypeString);
7429 Result += "\", \"";
7430 Result += MethodTypeString;
7431 Result += "\", (void *)";
7432 Result += MethodInternalNames[*MethodBegin];
7433 Result += "}\n";
7434 }
7435 Result += "\t }\n};\n";
7436}
7437
7438Stmt *RewriteModernObjC::RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV) {
7439 SourceRange OldRange = IV->getSourceRange();
7440 Expr *BaseExpr = IV->getBase();
7441
7442 // Rewrite the base, but without actually doing replaces.
7443 {
7444 DisableReplaceStmtScope S(*this);
7445 BaseExpr = cast<Expr>(Val: RewriteFunctionBodyOrGlobalInitializer(S: BaseExpr));
7446 IV->setBase(BaseExpr);
7447 }
7448
7449 ObjCIvarDecl *D = IV->getDecl();
7450
7451 Expr *Replacement = IV;
7452
7453 if (BaseExpr->getType()->isObjCObjectPointerType()) {
7454 const ObjCInterfaceType *iFaceDecl =
7455 dyn_cast<ObjCInterfaceType>(Val: BaseExpr->getType()->getPointeeType());
7456 assert(iFaceDecl && "RewriteObjCIvarRefExpr - iFaceDecl is null");
7457 // lookup which class implements the instance variable.
7458 ObjCInterfaceDecl *clsDeclared = nullptr;
7459 iFaceDecl->getDecl()->lookupInstanceVariable(IVarName: D->getIdentifier(),
7460 ClassDeclared&: clsDeclared);
7461 assert(clsDeclared && "RewriteObjCIvarRefExpr(): Can't find class");
7462
7463 // Build name of symbol holding ivar offset.
7464 std::string IvarOffsetName;
7465 if (D->isBitField())
7466 ObjCIvarBitfieldGroupOffset(IV: D, Result&: IvarOffsetName);
7467 else
7468 WriteInternalIvarName(IDecl: clsDeclared, IvarDecl: D, Result&: IvarOffsetName);
7469
7470 ReferencedIvars[clsDeclared].insert(X: D);
7471
7472 // cast offset to "char *".
7473 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Ctx: Context,
7474 Ty: Context->getPointerType(T: Context->CharTy),
7475 Kind: CK_BitCast,
7476 E: BaseExpr);
7477 VarDecl *NewVD = VarDecl::Create(C&: *Context, DC: TUDecl, StartLoc: SourceLocation(),
7478 IdLoc: SourceLocation(), Id: &Context->Idents.get(Name: IvarOffsetName),
7479 T: Context->UnsignedLongTy, TInfo: nullptr,
7480 S: SC_Extern);
7481 DeclRefExpr *DRE = new (Context)
7482 DeclRefExpr(*Context, NewVD, false, Context->UnsignedLongTy,
7483 VK_LValue, SourceLocation());
7484 BinaryOperator *addExpr = BinaryOperator::Create(
7485 C: *Context, lhs: castExpr, rhs: DRE, opc: BO_Add,
7486 ResTy: Context->getPointerType(T: Context->CharTy), VK: VK_PRValue, OK: OK_Ordinary,
7487 opLoc: SourceLocation(), FPFeatures: FPOptionsOverride());
7488 // Don't forget the parens to enforce the proper binding.
7489 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(),
7490 SourceLocation(),
7491 addExpr);
7492 QualType IvarT = D->getType();
7493 if (D->isBitField())
7494 IvarT = GetGroupRecordTypeForObjCIvarBitfield(IV: D);
7495
7496 if (!IvarT->getAs<TypedefType>() && IvarT->isRecordType()) {
7497 RecordDecl *RD = IvarT->castAs<RecordType>()->getDecl();
7498 RD = RD->getDefinition();
7499 if (RD && !RD->getDeclName().getAsIdentifierInfo()) {
7500 // decltype(((Foo_IMPL*)0)->bar) *
7501 auto *CDecl = cast<ObjCContainerDecl>(Val: D->getDeclContext());
7502 // ivar in class extensions requires special treatment.
7503 if (ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(Val: CDecl))
7504 CDecl = CatDecl->getClassInterface();
7505 std::string RecName = std::string(CDecl->getName());
7506 RecName += "_IMPL";
7507 RecordDecl *RD = RecordDecl::Create(
7508 C: *Context, TK: TagTypeKind::Struct, DC: TUDecl, StartLoc: SourceLocation(),
7509 IdLoc: SourceLocation(), Id: &Context->Idents.get(Name: RecName));
7510 QualType PtrStructIMPL = Context->getPointerType(T: Context->getTagDeclType(Decl: RD));
7511 unsigned UnsignedIntSize =
7512 static_cast<unsigned>(Context->getTypeSize(T: Context->UnsignedIntTy));
7513 Expr *Zero = IntegerLiteral::Create(C: *Context,
7514 V: llvm::APInt(UnsignedIntSize, 0),
7515 type: Context->UnsignedIntTy, l: SourceLocation());
7516 Zero = NoTypeInfoCStyleCastExpr(Ctx: Context, Ty: PtrStructIMPL, Kind: CK_BitCast, E: Zero);
7517 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
7518 Zero);
7519 FieldDecl *FD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(),
7520 IdLoc: SourceLocation(),
7521 Id: &Context->Idents.get(Name: D->getNameAsString()),
7522 T: IvarT, TInfo: nullptr,
7523 /*BitWidth=*/BW: nullptr,
7524 /*Mutable=*/true, InitStyle: ICIS_NoInit);
7525 MemberExpr *ME = MemberExpr::CreateImplicit(
7526 C: *Context, Base: PE, IsArrow: true, MemberDecl: FD, T: FD->getType(), VK: VK_LValue, OK: OK_Ordinary);
7527 IvarT = Context->getDecltypeType(e: ME, UnderlyingType: ME->getType());
7528 }
7529 }
7530 convertObjCTypeToCStyleType(T&: IvarT);
7531 QualType castT = Context->getPointerType(T: IvarT);
7532
7533 castExpr = NoTypeInfoCStyleCastExpr(Ctx: Context,
7534 Ty: castT,
7535 Kind: CK_BitCast,
7536 E: PE);
7537
7538 Expr *Exp = UnaryOperator::Create(
7539 C: const_cast<ASTContext &>(*Context), input: castExpr, opc: UO_Deref, type: IvarT,
7540 VK: VK_LValue, OK: OK_Ordinary, l: SourceLocation(), CanOverflow: false, FPFeatures: FPOptionsOverride());
7541 PE = new (Context) ParenExpr(OldRange.getBegin(),
7542 OldRange.getEnd(),
7543 Exp);
7544
7545 if (D->isBitField()) {
7546 FieldDecl *FD = FieldDecl::Create(C: *Context, DC: nullptr, StartLoc: SourceLocation(),
7547 IdLoc: SourceLocation(),
7548 Id: &Context->Idents.get(Name: D->getNameAsString()),
7549 T: D->getType(), TInfo: nullptr,
7550 /*BitWidth=*/BW: D->getBitWidth(),
7551 /*Mutable=*/true, InitStyle: ICIS_NoInit);
7552 MemberExpr *ME =
7553 MemberExpr::CreateImplicit(C: *Context, Base: PE, /*isArrow*/ IsArrow: false, MemberDecl: FD,
7554 T: FD->getType(), VK: VK_LValue, OK: OK_Ordinary);
7555 Replacement = ME;
7556
7557 }
7558 else
7559 Replacement = PE;
7560 }
7561
7562 ReplaceStmtWithRange(Old: IV, New: Replacement, SrcRange: OldRange);
7563 return Replacement;
7564}
7565
7566#endif // CLANG_ENABLE_OBJC_REWRITER
7567