Coverage Report

Created: 2021-08-24 07:12

/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/lib/Frontend/Rewrite/RewriteObjC.cpp
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Source (jump to first uncovered line)
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//===--- RewriteObjC.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
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//
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//===----------------------------------------------------------------------===//
8
//
9
// Hacks and fun related to the code rewriter.
10
//
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//===----------------------------------------------------------------------===//
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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/Config/config.h"
23
#include "clang/Lex/Lexer.h"
24
#include "clang/Rewrite/Core/Rewriter.h"
25
#include "llvm/ADT/DenseSet.h"
26
#include "llvm/ADT/SmallPtrSet.h"
27
#include "llvm/ADT/StringExtras.h"
28
#include "llvm/Support/MemoryBuffer.h"
29
#include "llvm/Support/raw_ostream.h"
30
#include <memory>
31
32
#if CLANG_ENABLE_OBJC_REWRITER
33
34
using namespace clang;
35
using llvm::utostr;
36
37
namespace {
38
  class RewriteObjC : public ASTConsumer {
39
  protected:
40
    enum {
41
      BLOCK_FIELD_IS_OBJECT   =  3,  /* id, NSObject, __attribute__((NSObject)),
42
                                        block, ... */
43
      BLOCK_FIELD_IS_BLOCK    =  7,  /* a block variable */
44
      BLOCK_FIELD_IS_BYREF    =  8,  /* the on stack structure holding the
45
                                        __block variable */
46
      BLOCK_FIELD_IS_WEAK     = 16,  /* declared __weak, only used in byref copy
47
                                        helpers */
48
      BLOCK_BYREF_CALLER      = 128, /* called from __block (byref) copy/dispose
49
                                        support routines */
50
      BLOCK_BYREF_CURRENT_MAX = 256
51
    };
52
53
    enum {
54
      BLOCK_NEEDS_FREE =        (1 << 24),
55
      BLOCK_HAS_COPY_DISPOSE =  (1 << 25),
56
      BLOCK_HAS_CXX_OBJ =       (1 << 26),
57
      BLOCK_IS_GC =             (1 << 27),
58
      BLOCK_IS_GLOBAL =         (1 << 28),
59
      BLOCK_HAS_DESCRIPTOR =    (1 << 29)
60
    };
61
    static const int OBJC_ABI_VERSION = 7;
62
63
    Rewriter Rewrite;
64
    DiagnosticsEngine &Diags;
65
    const LangOptions &LangOpts;
66
    ASTContext *Context;
67
    SourceManager *SM;
68
    TranslationUnitDecl *TUDecl;
69
    FileID MainFileID;
70
    const char *MainFileStart, *MainFileEnd;
71
    Stmt *CurrentBody;
72
    ParentMap *PropParentMap; // created lazily.
73
    std::string InFileName;
74
    std::unique_ptr<raw_ostream> OutFile;
75
    std::string Preamble;
76
77
    TypeDecl *ProtocolTypeDecl;
78
    VarDecl *GlobalVarDecl;
79
    unsigned RewriteFailedDiag;
80
    // ObjC string constant support.
81
    unsigned NumObjCStringLiterals;
82
    VarDecl *ConstantStringClassReference;
83
    RecordDecl *NSStringRecord;
84
85
    // ObjC foreach break/continue generation support.
86
    int BcLabelCount;
87
88
    unsigned TryFinallyContainsReturnDiag;
89
    // Needed for super.
90
    ObjCMethodDecl *CurMethodDef;
91
    RecordDecl *SuperStructDecl;
92
    RecordDecl *ConstantStringDecl;
93
94
    FunctionDecl *MsgSendFunctionDecl;
95
    FunctionDecl *MsgSendSuperFunctionDecl;
96
    FunctionDecl *MsgSendStretFunctionDecl;
97
    FunctionDecl *MsgSendSuperStretFunctionDecl;
98
    FunctionDecl *MsgSendFpretFunctionDecl;
99
    FunctionDecl *GetClassFunctionDecl;
100
    FunctionDecl *GetMetaClassFunctionDecl;
101
    FunctionDecl *GetSuperClassFunctionDecl;
102
    FunctionDecl *SelGetUidFunctionDecl;
103
    FunctionDecl *CFStringFunctionDecl;
104
    FunctionDecl *SuperConstructorFunctionDecl;
105
    FunctionDecl *CurFunctionDef;
106
    FunctionDecl *CurFunctionDeclToDeclareForBlock;
107
108
    /* Misc. containers needed for meta-data rewrite. */
109
    SmallVector<ObjCImplementationDecl *, 8> ClassImplementation;
110
    SmallVector<ObjCCategoryImplDecl *, 8> CategoryImplementation;
111
    llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCSynthesizedStructs;
112
    llvm::SmallPtrSet<ObjCProtocolDecl*, 8> ObjCSynthesizedProtocols;
113
    llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCForwardDecls;
114
    llvm::DenseMap<ObjCMethodDecl*, std::string> MethodInternalNames;
115
    SmallVector<Stmt *, 32> Stmts;
116
    SmallVector<int, 8> ObjCBcLabelNo;
117
    // Remember all the @protocol(<expr>) expressions.
118
    llvm::SmallPtrSet<ObjCProtocolDecl *, 32> ProtocolExprDecls;
119
120
    llvm::DenseSet<uint64_t> CopyDestroyCache;
121
122
    // Block expressions.
123
    SmallVector<BlockExpr *, 32> Blocks;
124
    SmallVector<int, 32> InnerDeclRefsCount;
125
    SmallVector<DeclRefExpr *, 32> InnerDeclRefs;
126
127
    SmallVector<DeclRefExpr *, 32> BlockDeclRefs;
128
129
    // Block related declarations.
130
    SmallVector<ValueDecl *, 8> BlockByCopyDecls;
131
    llvm::SmallPtrSet<ValueDecl *, 8> BlockByCopyDeclsPtrSet;
132
    SmallVector<ValueDecl *, 8> BlockByRefDecls;
133
    llvm::SmallPtrSet<ValueDecl *, 8> BlockByRefDeclsPtrSet;
134
    llvm::DenseMap<ValueDecl *, unsigned> BlockByRefDeclNo;
135
    llvm::SmallPtrSet<ValueDecl *, 8> ImportedBlockDecls;
136
    llvm::SmallPtrSet<VarDecl *, 8> ImportedLocalExternalDecls;
137
138
    llvm::DenseMap<BlockExpr *, std::string> RewrittenBlockExprs;
139
140
    // This maps an original source AST to it's rewritten form. This allows
141
    // us to avoid rewriting the same node twice (which is very uncommon).
142
    // This is needed to support some of the exotic property rewriting.
143
    llvm::DenseMap<Stmt *, Stmt *> ReplacedNodes;
144
145
    // Needed for header files being rewritten
146
    bool IsHeader;
147
    bool SilenceRewriteMacroWarning;
148
    bool objc_impl_method;
149
150
    bool DisableReplaceStmt;
151
    class DisableReplaceStmtScope {
152
      RewriteObjC &R;
153
      bool SavedValue;
154
155
    public:
156
      DisableReplaceStmtScope(RewriteObjC &R)
157
79
        : R(R), SavedValue(R.DisableReplaceStmt) {
158
79
        R.DisableReplaceStmt = true;
159
79
      }
160
161
79
      ~DisableReplaceStmtScope() {
162
79
        R.DisableReplaceStmt = SavedValue;
163
79
      }
164
    };
165
166
    void InitializeCommon(ASTContext &context);
167
168
  public:
169
    // Top Level Driver code.
170
439
    bool HandleTopLevelDecl(DeclGroupRef D) override {
171
949
      for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; 
++I510
) {
172
533
        if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(*I)) {
173
135
          if (!Class->isThisDeclarationADefinition()) {
174
17
            RewriteForwardClassDecl(D);
175
17
            break;
176
17
          }
177
135
        }
178
179
516
        if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>(*I)) {
180
27
          if (!Proto->isThisDeclarationADefinition()) {
181
6
            RewriteForwardProtocolDecl(D);
182
6
            break;
183
6
          }
184
27
        }
185
186
510
        HandleTopLevelSingleDecl(*I);
187
510
      }
188
439
      return true;
189
439
    }
190
191
    void HandleTopLevelSingleDecl(Decl *D);
192
    void HandleDeclInMainFile(Decl *D);
193
    RewriteObjC(std::string inFile, std::unique_ptr<raw_ostream> OS,
194
                DiagnosticsEngine &D, const LangOptions &LOpts,
195
                bool silenceMacroWarn);
196
197
86
    ~RewriteObjC() override {}
198
199
    void HandleTranslationUnit(ASTContext &C) override;
200
201
227
    void ReplaceStmt(Stmt *Old, Stmt *New) {
202
227
      ReplaceStmtWithRange(Old, New, Old->getSourceRange());
203
227
    }
204
205
306
    void ReplaceStmtWithRange(Stmt *Old, Stmt *New, SourceRange SrcRange) {
206
306
      assert(Old != nullptr && New != nullptr && "Expected non-null Stmt's");
207
208
0
      Stmt *ReplacingStmt = ReplacedNodes[Old];
209
306
      if (ReplacingStmt)
210
0
        return; // We can't rewrite the same node twice.
211
212
306
      if (DisableReplaceStmt)
213
24
        return;
214
215
      // Measure the old text.
216
282
      int Size = Rewrite.getRangeSize(SrcRange);
217
282
      if (Size == -1) {
218
0
        Diags.Report(Context->getFullLoc(Old->getBeginLoc()), RewriteFailedDiag)
219
0
            << Old->getSourceRange();
220
0
        return;
221
0
      }
222
      // Get the new text.
223
282
      std::string SStr;
224
282
      llvm::raw_string_ostream S(SStr);
225
282
      New->printPretty(S, nullptr, PrintingPolicy(LangOpts));
226
282
      const std::string &Str = S.str();
227
228
      // If replacement succeeded or warning disabled return with no warning.
229
282
      if (!Rewrite.ReplaceText(SrcRange.getBegin(), Size, Str)) {
230
282
        ReplacedNodes[Old] = New;
231
282
        return;
232
282
      }
233
0
      if (SilenceRewriteMacroWarning)
234
0
        return;
235
0
      Diags.Report(Context->getFullLoc(Old->getBeginLoc()), RewriteFailedDiag)
236
0
          << Old->getSourceRange();
237
0
    }
238
239
    void InsertText(SourceLocation Loc, StringRef Str,
240
817
                    bool InsertAfter = true) {
241
      // If insertion succeeded or warning disabled return with no warning.
242
817
      if (!Rewrite.InsertText(Loc, Str, InsertAfter) ||
243
817
          
SilenceRewriteMacroWarning0
)
244
817
        return;
245
246
0
      Diags.Report(Context->getFullLoc(Loc), RewriteFailedDiag);
247
0
    }
248
249
    void ReplaceText(SourceLocation Start, unsigned OrigLength,
250
599
                     StringRef Str) {
251
      // If removal succeeded or warning disabled return with no warning.
252
599
      if (!Rewrite.ReplaceText(Start, OrigLength, Str) ||
253
599
          
SilenceRewriteMacroWarning0
)
254
599
        return;
255
256
0
      Diags.Report(Context->getFullLoc(Start), RewriteFailedDiag);
257
0
    }
258
259
    // Syntactic Rewriting.
260
    void RewriteRecordBody(RecordDecl *RD);
261
    void RewriteInclude();
262
    void RewriteForwardClassDecl(DeclGroupRef D);
263
    void RewriteForwardClassDecl(const SmallVectorImpl<Decl *> &DG);
264
    void RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
265
                                     const std::string &typedefString);
266
    void RewriteImplementations();
267
    void RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
268
                                 ObjCImplementationDecl *IMD,
269
                                 ObjCCategoryImplDecl *CID);
270
    void RewriteInterfaceDecl(ObjCInterfaceDecl *Dcl);
271
    void RewriteImplementationDecl(Decl *Dcl);
272
    void RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
273
                               ObjCMethodDecl *MDecl, std::string &ResultStr);
274
    void RewriteTypeIntoString(QualType T, std::string &ResultStr,
275
                               const FunctionType *&FPRetType);
276
    void RewriteByRefString(std::string &ResultStr, const std::string &Name,
277
                            ValueDecl *VD, bool def=false);
278
    void RewriteCategoryDecl(ObjCCategoryDecl *Dcl);
279
    void RewriteProtocolDecl(ObjCProtocolDecl *Dcl);
280
    void RewriteForwardProtocolDecl(DeclGroupRef D);
281
    void RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG);
282
    void RewriteMethodDeclaration(ObjCMethodDecl *Method);
283
    void RewriteProperty(ObjCPropertyDecl *prop);
284
    void RewriteFunctionDecl(FunctionDecl *FD);
285
    void RewriteBlockPointerType(std::string& Str, QualType Type);
286
    void RewriteBlockPointerTypeVariable(std::string& Str, ValueDecl *VD);
287
    void RewriteBlockLiteralFunctionDecl(FunctionDecl *FD);
288
    void RewriteObjCQualifiedInterfaceTypes(Decl *Dcl);
289
    void RewriteTypeOfDecl(VarDecl *VD);
290
    void RewriteObjCQualifiedInterfaceTypes(Expr *E);
291
292
    // Expression Rewriting.
293
    Stmt *RewriteFunctionBodyOrGlobalInitializer(Stmt *S);
294
    Stmt *RewriteAtEncode(ObjCEncodeExpr *Exp);
295
    Stmt *RewritePropertyOrImplicitGetter(PseudoObjectExpr *Pseudo);
296
    Stmt *RewritePropertyOrImplicitSetter(PseudoObjectExpr *Pseudo);
297
    Stmt *RewriteAtSelector(ObjCSelectorExpr *Exp);
298
    Stmt *RewriteMessageExpr(ObjCMessageExpr *Exp);
299
    Stmt *RewriteObjCStringLiteral(ObjCStringLiteral *Exp);
300
    Stmt *RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp);
301
    void RewriteTryReturnStmts(Stmt *S);
302
    void RewriteSyncReturnStmts(Stmt *S, std::string buf);
303
    Stmt *RewriteObjCTryStmt(ObjCAtTryStmt *S);
304
    Stmt *RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S);
305
    Stmt *RewriteObjCThrowStmt(ObjCAtThrowStmt *S);
306
    Stmt *RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
307
                                       SourceLocation OrigEnd);
308
    Stmt *RewriteBreakStmt(BreakStmt *S);
309
    Stmt *RewriteContinueStmt(ContinueStmt *S);
310
    void RewriteCastExpr(CStyleCastExpr *CE);
311
312
    // Block rewriting.
313
    void RewriteBlocksInFunctionProtoType(QualType funcType, NamedDecl *D);
314
315
    // Block specific rewrite rules.
316
    void RewriteBlockPointerDecl(NamedDecl *VD);
317
    void RewriteByRefVar(VarDecl *VD);
318
    Stmt *RewriteBlockDeclRefExpr(DeclRefExpr *VD);
319
    Stmt *RewriteLocalVariableExternalStorage(DeclRefExpr *DRE);
320
    void RewriteBlockPointerFunctionArgs(FunctionDecl *FD);
321
322
    void RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
323
                                      std::string &Result);
324
325
    void Initialize(ASTContext &context) override = 0;
326
327
    // Metadata Rewriting.
328
    virtual void RewriteMetaDataIntoBuffer(std::string &Result) = 0;
329
    virtual void RewriteObjCProtocolListMetaData(const ObjCList<ObjCProtocolDecl> &Prots,
330
                                                 StringRef prefix,
331
                                                 StringRef ClassName,
332
                                                 std::string &Result) = 0;
333
    virtual void RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *CDecl,
334
                                             std::string &Result) = 0;
335
    virtual void RewriteObjCProtocolMetaData(ObjCProtocolDecl *Protocol,
336
                                     StringRef prefix,
337
                                     StringRef ClassName,
338
                                     std::string &Result) = 0;
339
    virtual void RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
340
                                          std::string &Result) = 0;
341
342
    // Rewriting ivar access
343
    virtual Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV) = 0;
344
    virtual void RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
345
                                         std::string &Result) = 0;
346
347
    // Misc. AST transformation routines. Sometimes they end up calling
348
    // rewriting routines on the new ASTs.
349
    CallExpr *SynthesizeCallToFunctionDecl(FunctionDecl *FD,
350
                                           ArrayRef<Expr *> Args,
351
                                           SourceLocation StartLoc=SourceLocation(),
352
                                           SourceLocation EndLoc=SourceLocation());
353
    CallExpr *SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
354
                                        QualType msgSendType,
355
                                        QualType returnType,
356
                                        SmallVectorImpl<QualType> &ArgTypes,
357
                                        SmallVectorImpl<Expr*> &MsgExprs,
358
                                        ObjCMethodDecl *Method);
359
    Stmt *SynthMessageExpr(ObjCMessageExpr *Exp,
360
                           SourceLocation StartLoc=SourceLocation(),
361
                           SourceLocation EndLoc=SourceLocation());
362
363
    void SynthCountByEnumWithState(std::string &buf);
364
    void SynthMsgSendFunctionDecl();
365
    void SynthMsgSendSuperFunctionDecl();
366
    void SynthMsgSendStretFunctionDecl();
367
    void SynthMsgSendFpretFunctionDecl();
368
    void SynthMsgSendSuperStretFunctionDecl();
369
    void SynthGetClassFunctionDecl();
370
    void SynthGetMetaClassFunctionDecl();
371
    void SynthGetSuperClassFunctionDecl();
372
    void SynthSelGetUidFunctionDecl();
373
    void SynthSuperConstructorFunctionDecl();
374
375
    std::string SynthesizeByrefCopyDestroyHelper(VarDecl *VD, int flag);
376
    std::string SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
377
                                      StringRef funcName, std::string Tag);
378
    std::string SynthesizeBlockFunc(BlockExpr *CE, int i,
379
                                      StringRef funcName, std::string Tag);
380
    std::string SynthesizeBlockImpl(BlockExpr *CE,
381
                                    std::string Tag, std::string Desc);
382
    std::string SynthesizeBlockDescriptor(std::string DescTag,
383
                                          std::string ImplTag,
384
                                          int i, StringRef funcName,
385
                                          unsigned hasCopy);
386
    Stmt *SynthesizeBlockCall(CallExpr *Exp, const Expr* BlockExp);
387
    void SynthesizeBlockLiterals(SourceLocation FunLocStart,
388
                                 StringRef FunName);
389
    FunctionDecl *SynthBlockInitFunctionDecl(StringRef name);
390
    Stmt *SynthBlockInitExpr(BlockExpr *Exp,
391
            const SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs);
392
393
    // Misc. helper routines.
394
    QualType getProtocolType();
395
    void WarnAboutReturnGotoStmts(Stmt *S);
396
    void HasReturnStmts(Stmt *S, bool &hasReturns);
397
    void CheckFunctionPointerDecl(QualType dType, NamedDecl *ND);
398
    void InsertBlockLiteralsWithinFunction(FunctionDecl *FD);
399
    void InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD);
400
401
    bool IsDeclStmtInForeachHeader(DeclStmt *DS);
402
    void CollectBlockDeclRefInfo(BlockExpr *Exp);
403
    void GetBlockDeclRefExprs(Stmt *S);
404
    void GetInnerBlockDeclRefExprs(Stmt *S,
405
                SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
406
                llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts);
407
408
    // We avoid calling Type::isBlockPointerType(), since it operates on the
409
    // canonical type. We only care if the top-level type is a closure pointer.
410
845
    bool isTopLevelBlockPointerType(QualType T) {
411
845
      return isa<BlockPointerType>(T);
412
845
    }
413
414
    /// convertBlockPointerToFunctionPointer - Converts a block-pointer type
415
    /// to a function pointer type and upon success, returns true; false
416
    /// otherwise.
417
324
    bool convertBlockPointerToFunctionPointer(QualType &T) {
418
324
      if (isTopLevelBlockPointerType(T)) {
419
14
        const auto *BPT = T->castAs<BlockPointerType>();
420
14
        T = Context->getPointerType(BPT->getPointeeType());
421
14
        return true;
422
14
      }
423
310
      return false;
424
324
    }
425
426
    bool needToScanForQualifiers(QualType T);
427
    QualType getSuperStructType();
428
    QualType getConstantStringStructType();
429
    QualType convertFunctionTypeOfBlocks(const FunctionType *FT);
430
    bool BufferContainsPPDirectives(const char *startBuf, const char *endBuf);
431
432
109
    void convertToUnqualifiedObjCType(QualType &T) {
433
109
      if (T->isObjCQualifiedIdType())
434
2
        T = Context->getObjCIdType();
435
107
      else if (T->isObjCQualifiedClassType())
436
0
        T = Context->getObjCClassType();
437
107
      else if (T->isObjCObjectPointerType() &&
438
107
               
T->getPointeeType()->isObjCQualifiedInterfaceType()56
) {
439
12
        if (const ObjCObjectPointerType * OBJPT =
440
12
              T->getAsObjCInterfacePointerType()) {
441
12
          const ObjCInterfaceType *IFaceT = OBJPT->getInterfaceType();
442
12
          T = QualType(IFaceT, 0);
443
12
          T = Context->getPointerType(T);
444
12
        }
445
12
     }
446
109
    }
447
448
    // FIXME: This predicate seems like it would be useful to add to ASTContext.
449
42
    bool isObjCType(QualType T) {
450
42
      if (!LangOpts.ObjC)
451
0
        return false;
452
453
42
      QualType OCT = Context->getCanonicalType(T).getUnqualifiedType();
454
455
42
      if (OCT == Context->getCanonicalType(Context->getObjCIdType()) ||
456
42
          
OCT == Context->getCanonicalType(Context->getObjCClassType())35
)
457
7
        return true;
458
459
35
      if (const PointerType *PT = OCT->getAs<PointerType>()) {
460
2
        if (isa<ObjCInterfaceType>(PT->getPointeeType()) ||
461
2
            PT->getPointeeType()->isObjCQualifiedIdType())
462
0
          return true;
463
2
      }
464
35
      return false;
465
35
    }
466
    bool PointerTypeTakesAnyBlockArguments(QualType QT);
467
    bool PointerTypeTakesAnyObjCQualifiedType(QualType QT);
468
    void GetExtentOfArgList(const char *Name, const char *&LParen,
469
                            const char *&RParen);
470
471
43
    void QuoteDoublequotes(std::string &From, std::string &To) {
472
347
      for (unsigned i = 0; i < From.length(); 
i++304
) {
473
304
        if (From[i] == '"')
474
38
          To += "\\\"";
475
266
        else
476
266
          To += From[i];
477
304
      }
478
43
    }
479
480
    QualType getSimpleFunctionType(QualType result,
481
                                   ArrayRef<QualType> args,
482
435
                                   bool variadic = false) {
483
435
      if (result == Context->getObjCInstanceType())
484
0
        result =  Context->getObjCIdType();
485
435
      FunctionProtoType::ExtProtoInfo fpi;
486
435
      fpi.Variadic = variadic;
487
435
      return Context->getFunctionType(result, args, fpi);
488
435
    }
489
490
    // Helper function: create a CStyleCastExpr with trivial type source info.
491
    CStyleCastExpr* NoTypeInfoCStyleCastExpr(ASTContext *Ctx, QualType Ty,
492
620
                                             CastKind Kind, Expr *E) {
493
620
      TypeSourceInfo *TInfo = Ctx->getTrivialTypeSourceInfo(Ty, SourceLocation());
494
620
      return CStyleCastExpr::Create(*Ctx, Ty, VK_PRValue, Kind, E, nullptr,
495
620
                                    FPOptionsOverride(), TInfo,
496
620
                                    SourceLocation(), SourceLocation());
497
620
    }
498
499
139
    StringLiteral *getStringLiteral(StringRef Str) {
500
139
      QualType StrType = Context->getConstantArrayType(
501
139
          Context->CharTy, llvm::APInt(32, Str.size() + 1), nullptr,
502
139
          ArrayType::Normal, 0);
503
139
      return StringLiteral::Create(*Context, Str, StringLiteral::Ascii,
504
139
                                   /*Pascal=*/false, StrType, SourceLocation());
505
139
    }
506
  };
507
508
  class RewriteObjCFragileABI : public RewriteObjC {
509
  public:
510
    RewriteObjCFragileABI(std::string inFile, std::unique_ptr<raw_ostream> OS,
511
                          DiagnosticsEngine &D, const LangOptions &LOpts,
512
                          bool silenceMacroWarn)
513
86
        : RewriteObjC(inFile, std::move(OS), D, LOpts, silenceMacroWarn) {}
514
515
86
    ~RewriteObjCFragileABI() override {}
516
    void Initialize(ASTContext &context) override;
517
518
    // Rewriting metadata
519
    template<typename MethodIterator>
520
    void RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
521
                                    MethodIterator MethodEnd,
522
                                    bool IsInstanceMethod,
523
                                    StringRef prefix,
524
                                    StringRef ClassName,
525
                                    std::string &Result);
526
    void RewriteObjCProtocolMetaData(ObjCProtocolDecl *Protocol,
527
                                     StringRef prefix, StringRef ClassName,
528
                                     std::string &Result) override;
529
    void RewriteObjCProtocolListMetaData(
530
          const ObjCList<ObjCProtocolDecl> &Prots,
531
          StringRef prefix, StringRef ClassName, std::string &Result) override;
532
    void RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
533
                                  std::string &Result) override;
534
    void RewriteMetaDataIntoBuffer(std::string &Result) override;
535
    void RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *CDecl,
536
                                     std::string &Result) override;
537
538
    // Rewriting ivar
539
    void RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
540
                                      std::string &Result) override;
541
    Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV) override;
542
  };
543
} // end anonymous namespace
544
545
void RewriteObjC::RewriteBlocksInFunctionProtoType(QualType funcType,
546
136
                                                   NamedDecl *D) {
547
136
  if (const FunctionProtoType *fproto
548
136
      = dyn_cast<FunctionProtoType>(funcType.IgnoreParens())) {
549
113
    for (const auto &I : fproto->param_types())
550
101
      if (isTopLevelBlockPointerType(I)) {
551
        // All the args are checked/rewritten. Don't call twice!
552
20
        RewriteBlockPointerDecl(D);
553
20
        break;
554
20
      }
555
113
  }
556
136
}
557
558
1
void RewriteObjC::CheckFunctionPointerDecl(QualType funcType, NamedDecl *ND) {
559
1
  const PointerType *PT = funcType->getAs<PointerType>();
560
1
  if (PT && PointerTypeTakesAnyBlockArguments(funcType))
561
0
    RewriteBlocksInFunctionProtoType(PT->getPointeeType(), ND);
562
1
}
563
564
86
static bool IsHeaderFile(const std::string &Filename) {
565
86
  std::string::size_type DotPos = Filename.rfind('.');
566
567
86
  if (DotPos == std::string::npos) {
568
    // no file extension
569
0
    return false;
570
0
  }
571
572
86
  std::string Ext = std::string(Filename.begin()+DotPos+1, Filename.end());
573
  // C header: .h
574
  // C++ header: .hh or .H;
575
86
  return Ext == "h" || Ext == "hh" || Ext == "H";
576
86
}
577
578
RewriteObjC::RewriteObjC(std::string inFile, std::unique_ptr<raw_ostream> OS,
579
                         DiagnosticsEngine &D, const LangOptions &LOpts,
580
                         bool silenceMacroWarn)
581
    : Diags(D), LangOpts(LOpts), InFileName(inFile), OutFile(std::move(OS)),
582
86
      SilenceRewriteMacroWarning(silenceMacroWarn) {
583
86
  IsHeader = IsHeaderFile(inFile);
584
86
  RewriteFailedDiag = Diags.getCustomDiagID(DiagnosticsEngine::Warning,
585
86
               "rewriting sub-expression within a macro (may not be correct)");
586
86
  TryFinallyContainsReturnDiag = Diags.getCustomDiagID(
587
86
               DiagnosticsEngine::Warning,
588
86
               "rewriter doesn't support user-specified control flow semantics "
589
86
               "for @try/@finally (code may not execute properly)");
590
86
}
591
592
std::unique_ptr<ASTConsumer>
593
clang::CreateObjCRewriter(const std::string &InFile,
594
                          std::unique_ptr<raw_ostream> OS,
595
                          DiagnosticsEngine &Diags, const LangOptions &LOpts,
596
86
                          bool SilenceRewriteMacroWarning) {
597
86
  return std::make_unique<RewriteObjCFragileABI>(
598
86
      InFile, std::move(OS), Diags, LOpts, SilenceRewriteMacroWarning);
599
86
}
600
601
86
void RewriteObjC::InitializeCommon(ASTContext &context) {
602
86
  Context = &context;
603
86
  SM = &Context->getSourceManager();
604
86
  TUDecl = Context->getTranslationUnitDecl();
605
86
  MsgSendFunctionDecl = nullptr;
606
86
  MsgSendSuperFunctionDecl = nullptr;
607
86
  MsgSendStretFunctionDecl = nullptr;
608
86
  MsgSendSuperStretFunctionDecl = nullptr;
609
86
  MsgSendFpretFunctionDecl = nullptr;
610
86
  GetClassFunctionDecl = nullptr;
611
86
  GetMetaClassFunctionDecl = nullptr;
612
86
  GetSuperClassFunctionDecl = nullptr;
613
86
  SelGetUidFunctionDecl = nullptr;
614
86
  CFStringFunctionDecl = nullptr;
615
86
  ConstantStringClassReference = nullptr;
616
86
  NSStringRecord = nullptr;
617
86
  CurMethodDef = nullptr;
618
86
  CurFunctionDef = nullptr;
619
86
  CurFunctionDeclToDeclareForBlock = nullptr;
620
86
  GlobalVarDecl = nullptr;
621
86
  SuperStructDecl = nullptr;
622
86
  ProtocolTypeDecl = nullptr;
623
86
  ConstantStringDecl = nullptr;
624
86
  BcLabelCount = 0;
625
86
  SuperConstructorFunctionDecl = nullptr;
626
86
  NumObjCStringLiterals = 0;
627
86
  PropParentMap = nullptr;
628
86
  CurrentBody = nullptr;
629
86
  DisableReplaceStmt = false;
630
86
  objc_impl_method = false;
631
632
  // Get the ID and start/end of the main file.
633
86
  MainFileID = SM->getMainFileID();
634
86
  llvm::MemoryBufferRef MainBuf = SM->getBufferOrFake(MainFileID);
635
86
  MainFileStart = MainBuf.getBufferStart();
636
86
  MainFileEnd = MainBuf.getBufferEnd();
637
638
86
  Rewrite.setSourceMgr(Context->getSourceManager(), Context->getLangOpts());
639
86
}
640
641
//===----------------------------------------------------------------------===//
642
// Top Level Driver Code
643
//===----------------------------------------------------------------------===//
644
645
524
void RewriteObjC::HandleTopLevelSingleDecl(Decl *D) {
646
524
  if (Diags.hasErrorOccurred())
647
0
    return;
648
649
  // Two cases: either the decl could be in the main file, or it could be in a
650
  // #included file.  If the former, rewrite it now.  If the later, check to see
651
  // if we rewrote the #include/#import.
652
524
  SourceLocation Loc = D->getLocation();
653
524
  Loc = SM->getExpansionLoc(Loc);
654
655
  // If this is for a builtin, ignore it.
656
524
  if (Loc.isInvalid()) 
return0
;
657
658
  // Look for built-in declarations that we need to refer during the rewrite.
659
524
  if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
660
136
    RewriteFunctionDecl(FD);
661
388
  } else if (VarDecl *FVD = dyn_cast<VarDecl>(D)) {
662
    // declared in <Foundation/NSString.h>
663
17
    if (FVD->getName() == "_NSConstantStringClassReference") {
664
0
      ConstantStringClassReference = FVD;
665
0
      return;
666
0
    }
667
371
  } else if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
668
118
    if (ID->isThisDeclarationADefinition())
669
118
      RewriteInterfaceDecl(ID);
670
253
  } else if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(D)) {
671
6
    RewriteCategoryDecl(CD);
672
247
  } else if (ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D)) {
673
21
    if (PD->isThisDeclarationADefinition())
674
21
      RewriteProtocolDecl(PD);
675
226
  } else if (LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(D)) {
676
    // Recurse into linkage specifications
677
13
    for (DeclContext::decl_iterator DI = LSD->decls_begin(),
678
13
                                 DIEnd = LSD->decls_end();
679
27
         DI != DIEnd; ) {
680
14
      if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>((*DI))) {
681
0
        if (!IFace->isThisDeclarationADefinition()) {
682
0
          SmallVector<Decl *, 8> DG;
683
0
          SourceLocation StartLoc = IFace->getBeginLoc();
684
0
          do {
685
0
            if (isa<ObjCInterfaceDecl>(*DI) &&
686
0
                !cast<ObjCInterfaceDecl>(*DI)->isThisDeclarationADefinition() &&
687
0
                StartLoc == (*DI)->getBeginLoc())
688
0
              DG.push_back(*DI);
689
0
            else
690
0
              break;
691
692
0
            ++DI;
693
0
          } while (DI != DIEnd);
694
0
          RewriteForwardClassDecl(DG);
695
0
          continue;
696
0
        }
697
0
      }
698
699
14
      if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>((*DI))) {
700
0
        if (!Proto->isThisDeclarationADefinition()) {
701
0
          SmallVector<Decl *, 8> DG;
702
0
          SourceLocation StartLoc = Proto->getBeginLoc();
703
0
          do {
704
0
            if (isa<ObjCProtocolDecl>(*DI) &&
705
0
                !cast<ObjCProtocolDecl>(*DI)->isThisDeclarationADefinition() &&
706
0
                StartLoc == (*DI)->getBeginLoc())
707
0
              DG.push_back(*DI);
708
0
            else
709
0
              break;
710
711
0
            ++DI;
712
0
          } while (DI != DIEnd);
713
0
          RewriteForwardProtocolDecl(DG);
714
0
          continue;
715
0
        }
716
0
      }
717
718
14
      HandleTopLevelSingleDecl(*DI);
719
14
      ++DI;
720
14
    }
721
13
  }
722
  // If we have a decl in the main file, see if we should rewrite it.
723
524
  if (SM->isWrittenInMainFile(Loc))
724
522
    return HandleDeclInMainFile(D);
725
524
}
726
727
//===----------------------------------------------------------------------===//
728
// Syntactic (non-AST) Rewriting Code
729
//===----------------------------------------------------------------------===//
730
731
86
void RewriteObjC::RewriteInclude() {
732
86
  SourceLocation LocStart = SM->getLocForStartOfFile(MainFileID);
733
86
  StringRef MainBuf = SM->getBufferData(MainFileID);
734
86
  const char *MainBufStart = MainBuf.begin();
735
86
  const char *MainBufEnd = MainBuf.end();
736
86
  size_t ImportLen = strlen("import");
737
738
  // Loop over the whole file, looking for includes.
739
60.1k
  for (const char *BufPtr = MainBufStart; BufPtr < MainBufEnd; 
++BufPtr60.0k
) {
740
60.0k
    if (*BufPtr == '#') {
741
23
      if (++BufPtr == MainBufEnd)
742
0
        return;
743
44
      
while (23
*BufPtr == ' ' ||
*BufPtr == '\t'23
)
744
21
        if (++BufPtr == MainBufEnd)
745
0
          return;
746
23
      if (!strncmp(BufPtr, "import", ImportLen)) {
747
        // replace import with include
748
0
        SourceLocation ImportLoc =
749
0
          LocStart.getLocWithOffset(BufPtr-MainBufStart);
750
0
        ReplaceText(ImportLoc, ImportLen, "include");
751
0
        BufPtr += ImportLen;
752
0
      }
753
23
    }
754
60.0k
  }
755
86
}
756
757
3
static std::string getIvarAccessString(ObjCIvarDecl *OID) {
758
3
  const ObjCInterfaceDecl *ClassDecl = OID->getContainingInterface();
759
3
  std::string S;
760
3
  S = "((struct ";
761
3
  S += ClassDecl->getIdentifier()->getName();
762
3
  S += "_IMPL *)self)->";
763
3
  S += OID->getName();
764
3
  return S;
765
3
}
766
767
void RewriteObjC::RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
768
                                          ObjCImplementationDecl *IMD,
769
12
                                          ObjCCategoryImplDecl *CID) {
770
12
  static bool objcGetPropertyDefined = false;
771
12
  static bool objcSetPropertyDefined = false;
772
12
  SourceLocation startLoc = PID->getBeginLoc();
773
12
  InsertText(startLoc, "// ");
774
12
  const char *startBuf = SM->getCharacterData(startLoc);
775
12
  assert((*startBuf == '@') && "bogus @synthesize location");
776
0
  const char *semiBuf = strchr(startBuf, ';');
777
12
  assert((*semiBuf == ';') && "@synthesize: can't find ';'");
778
0
  SourceLocation onePastSemiLoc =
779
12
    startLoc.getLocWithOffset(semiBuf-startBuf+1);
780
781
12
  if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
782
2
    return; // FIXME: is this correct?
783
784
  // Generate the 'getter' function.
785
10
  ObjCPropertyDecl *PD = PID->getPropertyDecl();
786
10
  ObjCIvarDecl *OID = PID->getPropertyIvarDecl();
787
788
10
  if (!OID)
789
0
    return;
790
791
10
  unsigned Attributes = PD->getPropertyAttributes();
792
10
  if (PID->getGetterMethodDecl() && !PID->getGetterMethodDecl()->isDefined()) {
793
9
    bool GenGetProperty =
794
9
        !(Attributes & ObjCPropertyAttribute::kind_nonatomic) &&
795
9
        (Attributes & (ObjCPropertyAttribute::kind_retain |
796
9
                       ObjCPropertyAttribute::kind_copy));
797
9
    std::string Getr;
798
9
    if (GenGetProperty && 
!objcGetPropertyDefined7
) {
799
5
      objcGetPropertyDefined = true;
800
      // FIXME. Is this attribute correct in all cases?
801
5
      Getr = "\nextern \"C\" __declspec(dllimport) "
802
5
            "id objc_getProperty(id, SEL, long, bool);\n";
803
5
    }
804
9
    RewriteObjCMethodDecl(OID->getContainingInterface(),
805
9
                          PID->getGetterMethodDecl(), Getr);
806
9
    Getr += "{ ";
807
    // Synthesize an explicit cast to gain access to the ivar.
808
    // See objc-act.c:objc_synthesize_new_getter() for details.
809
9
    if (GenGetProperty) {
810
      // return objc_getProperty(self, _cmd, offsetof(ClassDecl, OID), 1)
811
7
      Getr += "typedef ";
812
7
      const FunctionType *FPRetType = nullptr;
813
7
      RewriteTypeIntoString(PID->getGetterMethodDecl()->getReturnType(), Getr,
814
7
                            FPRetType);
815
7
      Getr += " _TYPE";
816
7
      if (FPRetType) {
817
1
        Getr += ")"; // close the precedence "scope" for "*".
818
819
        // Now, emit the argument types (if any).
820
1
        if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)){
821
1
          Getr += "(";
822
1
          for (unsigned i = 0, e = FT->getNumParams(); i != e; 
++i0
) {
823
0
            if (i) Getr += ", ";
824
0
            std::string ParamStr =
825
0
                FT->getParamType(i).getAsString(Context->getPrintingPolicy());
826
0
            Getr += ParamStr;
827
0
          }
828
1
          if (FT->isVariadic()) {
829
0
            if (FT->getNumParams())
830
0
              Getr += ", ";
831
0
            Getr += "...";
832
0
          }
833
1
          Getr += ")";
834
1
        } else
835
0
          Getr += "()";
836
1
      }
837
7
      Getr += ";\n";
838
7
      Getr += "return (_TYPE)";
839
7
      Getr += "objc_getProperty(self, _cmd, ";
840
7
      RewriteIvarOffsetComputation(OID, Getr);
841
7
      Getr += ", 1)";
842
7
    }
843
2
    else
844
2
      Getr += "return " + getIvarAccessString(OID);
845
9
    Getr += "; }";
846
9
    InsertText(onePastSemiLoc, Getr);
847
9
  }
848
849
10
  if (PD->isReadOnly() || 
!PID->getSetterMethodDecl()9
||
850
10
      
PID->getSetterMethodDecl()->isDefined()9
)
851
2
    return;
852
853
  // Generate the 'setter' function.
854
8
  std::string Setr;
855
8
  bool GenSetProperty = Attributes & (ObjCPropertyAttribute::kind_retain |
856
8
                                      ObjCPropertyAttribute::kind_copy);
857
8
  if (GenSetProperty && 
!objcSetPropertyDefined7
) {
858
5
    objcSetPropertyDefined = true;
859
    // FIXME. Is this attribute correct in all cases?
860
5
    Setr = "\nextern \"C\" __declspec(dllimport) "
861
5
    "void objc_setProperty (id, SEL, long, id, bool, bool);\n";
862
5
  }
863
864
8
  RewriteObjCMethodDecl(OID->getContainingInterface(),
865
8
                        PID->getSetterMethodDecl(), Setr);
866
8
  Setr += "{ ";
867
  // Synthesize an explicit cast to initialize the ivar.
868
  // See objc-act.c:objc_synthesize_new_setter() for details.
869
8
  if (GenSetProperty) {
870
7
    Setr += "objc_setProperty (self, _cmd, ";
871
7
    RewriteIvarOffsetComputation(OID, Setr);
872
7
    Setr += ", (id)";
873
7
    Setr += PD->getName();
874
7
    Setr += ", ";
875
7
    if (Attributes & ObjCPropertyAttribute::kind_nonatomic)
876
0
      Setr += "0, ";
877
7
    else
878
7
      Setr += "1, ";
879
7
    if (Attributes & ObjCPropertyAttribute::kind_copy)
880
3
      Setr += "1)";
881
4
    else
882
4
      Setr += "0)";
883
7
  }
884
1
  else {
885
1
    Setr += getIvarAccessString(OID) + " = ";
886
1
    Setr += PD->getName();
887
1
  }
888
8
  Setr += "; }";
889
8
  InsertText(onePastSemiLoc, Setr);
890
8
}
891
892
static void RewriteOneForwardClassDecl(ObjCInterfaceDecl *ForwardDecl,
893
27
                                       std::string &typedefString) {
894
27
  typedefString += "#ifndef _REWRITER_typedef_";
895
27
  typedefString += ForwardDecl->getNameAsString();
896
27
  typedefString += "\n";
897
27
  typedefString += "#define _REWRITER_typedef_";
898
27
  typedefString += ForwardDecl->getNameAsString();
899
27
  typedefString += "\n";
900
27
  typedefString += "typedef struct objc_object ";
901
27
  typedefString += ForwardDecl->getNameAsString();
902
27
  typedefString += ";\n#endif\n";
903
27
}
904
905
void RewriteObjC::RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
906
17
                                              const std::string &typedefString) {
907
17
  SourceLocation startLoc = ClassDecl->getBeginLoc();
908
17
  const char *startBuf = SM->getCharacterData(startLoc);
909
17
  const char *semiPtr = strchr(startBuf, ';');
910
  // Replace the @class with typedefs corresponding to the classes.
911
17
  ReplaceText(startLoc, semiPtr - startBuf + 1, typedefString);
912
17
}
913
914
17
void RewriteObjC::RewriteForwardClassDecl(DeclGroupRef D) {
915
17
  std::string typedefString;
916
44
  for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; 
++I27
) {
917
27
    ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(*I);
918
27
    if (I == D.begin()) {
919
      // Translate to typedef's that forward reference structs with the same name
920
      // as the class. As a convenience, we include the original declaration
921
      // as a comment.
922
17
      typedefString += "// @class ";
923
17
      typedefString += ForwardDecl->getNameAsString();
924
17
      typedefString += ";\n";
925
17
    }
926
27
    RewriteOneForwardClassDecl(ForwardDecl, typedefString);
927
27
  }
928
17
  DeclGroupRef::iterator I = D.begin();
929
17
  RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(*I), typedefString);
930
17
}
931
932
0
void RewriteObjC::RewriteForwardClassDecl(const SmallVectorImpl<Decl *> &D) {
933
0
  std::string typedefString;
934
0
  for (unsigned i = 0; i < D.size(); i++) {
935
0
    ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(D[i]);
936
0
    if (i == 0) {
937
0
      typedefString += "// @class ";
938
0
      typedefString += ForwardDecl->getNameAsString();
939
0
      typedefString += ";\n";
940
0
    }
941
0
    RewriteOneForwardClassDecl(ForwardDecl, typedefString);
942
0
  }
943
0
  RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(D[0]), typedefString);
944
0
}
945
946
123
void RewriteObjC::RewriteMethodDeclaration(ObjCMethodDecl *Method) {
947
  // When method is a synthesized one, such as a getter/setter there is
948
  // nothing to rewrite.
949
123
  if (Method->isImplicit())
950
42
    return;
951
81
  SourceLocation LocStart = Method->getBeginLoc();
952
81
  SourceLocation LocEnd = Method->getEndLoc();
953
954
81
  if (SM->getExpansionLineNumber(LocEnd) >
955
81
      SM->getExpansionLineNumber(LocStart)) {
956
0
    InsertText(LocStart, "#if 0\n");
957
0
    ReplaceText(LocEnd, 1, ";\n#endif\n");
958
81
  } else {
959
81
    InsertText(LocStart, "// ");
960
81
  }
961
81
}
962
963
23
void RewriteObjC::RewriteProperty(ObjCPropertyDecl *prop) {
964
23
  SourceLocation Loc = prop->getAtLoc();
965
966
23
  ReplaceText(Loc, 0, "// ");
967
  // FIXME: handle properties that are declared across multiple lines.
968
23
}
969
970
6
void RewriteObjC::RewriteCategoryDecl(ObjCCategoryDecl *CatDecl) {
971
6
  SourceLocation LocStart = CatDecl->getBeginLoc();
972
973
  // FIXME: handle category headers that are declared across multiple lines.
974
6
  ReplaceText(LocStart, 0, "// ");
975
976
6
  for (auto *I : CatDecl->instance_properties())
977
1
    RewriteProperty(I);
978
6
  for (auto *I : CatDecl->instance_methods())
979
6
    RewriteMethodDeclaration(I);
980
6
  for (auto *I : CatDecl->class_methods())
981
0
    RewriteMethodDeclaration(I);
982
983
  // Lastly, comment out the @end.
984
6
  ReplaceText(CatDecl->getAtEndRange().getBegin(),
985
6
              strlen("@end"), "/* @end */");
986
6
}
987
988
21
void RewriteObjC::RewriteProtocolDecl(ObjCProtocolDecl *PDecl) {
989
21
  SourceLocation LocStart = PDecl->getBeginLoc();
990
21
  assert(PDecl->isThisDeclarationADefinition());
991
992
  // FIXME: handle protocol headers that are declared across multiple lines.
993
0
  ReplaceText(LocStart, 0, "// ");
994
995
21
  for (auto *I : PDecl->instance_methods())
996
13
    RewriteMethodDeclaration(I);
997
21
  for (auto *I : PDecl->class_methods())
998
1
    RewriteMethodDeclaration(I);
999
21
  for (auto *I : PDecl->instance_properties())
1000
2
    RewriteProperty(I);
1001
1002
  // Lastly, comment out the @end.
1003
21
  SourceLocation LocEnd = PDecl->getAtEndRange().getBegin();
1004
21
  ReplaceText(LocEnd, strlen("@end"), "/* @end */");
1005
1006
  // Must comment out @optional/@required
1007
21
  const char *startBuf = SM->getCharacterData(LocStart);
1008
21
  const char *endBuf = SM->getCharacterData(LocEnd);
1009
998
  for (const char *p = startBuf; p < endBuf; 
p++977
) {
1010
977
    if (*p == '@' && 
!strncmp(p+1, "optional", strlen("optional"))25
) {
1011
2
      SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
1012
2
      ReplaceText(OptionalLoc, strlen("@optional"), "/* @optional */");
1013
1014
2
    }
1015
975
    else if (*p == '@' && 
!strncmp(p+1, "required", strlen("required"))23
) {
1016
0
      SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
1017
0
      ReplaceText(OptionalLoc, strlen("@required"), "/* @required */");
1018
1019
0
    }
1020
977
  }
1021
21
}
1022
1023
6
void RewriteObjC::RewriteForwardProtocolDecl(DeclGroupRef D) {
1024
6
  SourceLocation LocStart = (*D.begin())->getBeginLoc();
1025
6
  if (LocStart.isInvalid())
1026
0
    llvm_unreachable("Invalid SourceLocation");
1027
  // FIXME: handle forward protocol that are declared across multiple lines.
1028
6
  ReplaceText(LocStart, 0, "// ");
1029
6
}
1030
1031
void
1032
0
RewriteObjC::RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG) {
1033
0
  SourceLocation LocStart = DG[0]->getBeginLoc();
1034
0
  if (LocStart.isInvalid())
1035
0
    llvm_unreachable("Invalid SourceLocation");
1036
  // FIXME: handle forward protocol that are declared across multiple lines.
1037
0
  ReplaceText(LocStart, 0, "// ");
1038
0
}
1039
1040
void RewriteObjC::RewriteTypeIntoString(QualType T, std::string &ResultStr,
1041
101
                                        const FunctionType *&FPRetType) {
1042
101
  if (T->isObjCQualifiedIdType())
1043
2
    ResultStr += "id";
1044
99
  else if (T->isFunctionPointerType() ||
1045
99
           T->isBlockPointerType()) {
1046
    // needs special handling, since pointer-to-functions have special
1047
    // syntax (where a decaration models use).
1048
3
    QualType retType = T;
1049
3
    QualType PointeeTy;
1050
3
    if (const PointerType* PT = retType->getAs<PointerType>())
1051
0
      PointeeTy = PT->getPointeeType();
1052
3
    else if (const BlockPointerType *BPT = retType->getAs<BlockPointerType>())
1053
3
      PointeeTy = BPT->getPointeeType();
1054
3
    if ((FPRetType = PointeeTy->getAs<FunctionType>())) {
1055
3
      ResultStr +=
1056
3
          FPRetType->getReturnType().getAsString(Context->getPrintingPolicy());
1057
3
      ResultStr += "(*";
1058
3
    }
1059
3
  } else
1060
96
    ResultStr += T.getAsString(Context->getPrintingPolicy());
1061
101
}
1062
1063
void RewriteObjC::RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
1064
                                        ObjCMethodDecl *OMD,
1065
94
                                        std::string &ResultStr) {
1066
  //fprintf(stderr,"In RewriteObjCMethodDecl\n");
1067
94
  const FunctionType *FPRetType = nullptr;
1068
94
  ResultStr += "\nstatic ";
1069
94
  RewriteTypeIntoString(OMD->getReturnType(), ResultStr, FPRetType);
1070
94
  ResultStr += " ";
1071
1072
  // Unique method name
1073
94
  std::string NameStr;
1074
1075
94
  if (OMD->isInstanceMethod())
1076
88
    NameStr += "_I_";
1077
6
  else
1078
6
    NameStr += "_C_";
1079
1080
94
  NameStr += IDecl->getNameAsString();
1081
94
  NameStr += "_";
1082
1083
94
  if (ObjCCategoryImplDecl *CID =
1084
94
      dyn_cast<ObjCCategoryImplDecl>(OMD->getDeclContext())) {
1085
6
    NameStr += CID->getNameAsString();
1086
6
    NameStr += "_";
1087
6
  }
1088
  // Append selector names, replacing ':' with '_'
1089
94
  {
1090
94
    std::string selString = OMD->getSelector().getAsString();
1091
94
    int len = selString.size();
1092
1.11k
    for (int i = 0; i < len; 
i++1.02k
)
1093
1.02k
      if (selString[i] == ':')
1094
47
        selString[i] = '_';
1095
94
    NameStr += selString;
1096
94
  }
1097
  // Remember this name for metadata emission
1098
94
  MethodInternalNames[OMD] = NameStr;
1099
94
  ResultStr += NameStr;
1100
1101
  // Rewrite arguments
1102
94
  ResultStr += "(";
1103
1104
  // invisible arguments
1105
94
  if (OMD->isInstanceMethod()) {
1106
88
    QualType selfTy = Context->getObjCInterfaceType(IDecl);
1107
88
    selfTy = Context->getPointerType(selfTy);
1108
88
    if (!LangOpts.MicrosoftExt) {
1109
30
      if (ObjCSynthesizedStructs.count(const_cast<ObjCInterfaceDecl*>(IDecl)))
1110
8
        ResultStr += "struct ";
1111
30
    }
1112
    // When rewriting for Microsoft, explicitly omit the structure name.
1113
88
    ResultStr += IDecl->getNameAsString();
1114
88
    ResultStr += " *";
1115
88
  }
1116
6
  else
1117
6
    ResultStr += Context->getObjCClassType().getAsString(
1118
6
      Context->getPrintingPolicy());
1119
1120
94
  ResultStr += " self, ";
1121
94
  ResultStr += Context->getObjCSelType().getAsString(Context->getPrintingPolicy());
1122
94
  ResultStr += " _cmd";
1123
1124
  // Method arguments.
1125
94
  for (const auto *PDecl : OMD->parameters()) {
1126
47
    ResultStr += ", ";
1127
47
    if (PDecl->getType()->isObjCQualifiedIdType()) {
1128
1
      ResultStr += "id ";
1129
1
      ResultStr += PDecl->getNameAsString();
1130
46
    } else {
1131
46
      std::string Name = PDecl->getNameAsString();
1132
46
      QualType QT = PDecl->getType();
1133
      // Make sure we convert "t (^)(...)" to "t (*)(...)".
1134
46
      (void)convertBlockPointerToFunctionPointer(QT);
1135
46
      QT.getAsStringInternal(Name, Context->getPrintingPolicy());
1136
46
      ResultStr += Name;
1137
46
    }
1138
47
  }
1139
94
  if (OMD->isVariadic())
1140
1
    ResultStr += ", ...";
1141
94
  ResultStr += ") ";
1142
1143
94
  if (FPRetType) {
1144
2
    ResultStr += ")"; // close the precedence "scope" for "*".
1145
1146
    // Now, emit the argument types (if any).
1147
2
    if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)) {
1148
2
      ResultStr += "(";
1149
2
      for (unsigned i = 0, e = FT->getNumParams(); i != e; 
++i0
) {
1150
0
        if (i) ResultStr += ", ";
1151
0
        std::string ParamStr =
1152
0
            FT->getParamType(i).getAsString(Context->getPrintingPolicy());
1153
0
        ResultStr += ParamStr;
1154
0
      }
1155
2
      if (FT->isVariadic()) {
1156
0
        if (FT->getNumParams())
1157
0
          ResultStr += ", ";
1158
0
        ResultStr += "...";
1159
0
      }
1160
2
      ResultStr += ")";
1161
2
    } else {
1162
0
      ResultStr += "()";
1163
0
    }
1164
2
  }
1165
94
}
1166
1167
70
void RewriteObjC::RewriteImplementationDecl(Decl *OID) {
1168
70
  ObjCImplementationDecl *IMD = dyn_cast<ObjCImplementationDecl>(OID);
1169
70
  ObjCCategoryImplDecl *CID = dyn_cast<ObjCCategoryImplDecl>(OID);
1170
70
  assert((IMD || CID) && "Unknown ImplementationDecl");
1171
1172
70
  InsertText(IMD ? 
IMD->getBeginLoc()64
:
CID->getBeginLoc()6
, "// ");
1173
1174
88
  for (auto *OMD : 
IMD70
?
IMD->instance_methods()64
:
CID->instance_methods()6
) {
1175
88
    if (!OMD->getBody())
1176
17
      continue;
1177
71
    std::string ResultStr;
1178
71
    RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
1179
71
    SourceLocation LocStart = OMD->getBeginLoc();
1180
71
    SourceLocation LocEnd = OMD->getCompoundBody()->getBeginLoc();
1181
1182
71
    const char *startBuf = SM->getCharacterData(LocStart);
1183
71
    const char *endBuf = SM->getCharacterData(LocEnd);
1184
71
    ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1185
71
  }
1186
1187
70
  for (auto *OMD : IMD ? 
IMD->class_methods()64
:
CID->class_methods()6
) {
1188
6
    if (!OMD->getBody())
1189
0
      continue;
1190
6
    std::string ResultStr;
1191
6
    RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
1192
6
    SourceLocation LocStart = OMD->getBeginLoc();
1193
6
    SourceLocation LocEnd = OMD->getCompoundBody()->getBeginLoc();
1194
1195
6
    const char *startBuf = SM->getCharacterData(LocStart);
1196
6
    const char *endBuf = SM->getCharacterData(LocEnd);
1197
6
    ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1198
6
  }
1199
70
  for (auto *I : IMD ? 
IMD->property_impls()64
:
CID->property_impls()6
)
1200
12
    RewritePropertyImplDecl(I, IMD, CID);
1201
1202
70
  InsertText(IMD ? 
IMD->getEndLoc()64
:
CID->getEndLoc()6
, "// ");
1203
70
}
1204
1205
118
void RewriteObjC::RewriteInterfaceDecl(ObjCInterfaceDecl *ClassDecl) {
1206
118
  std::string ResultStr;
1207
118
  if (!ObjCForwardDecls.count(ClassDecl->getCanonicalDecl())) {
1208
    // we haven't seen a forward decl - generate a typedef.
1209
118
    ResultStr = "#ifndef _REWRITER_typedef_";
1210
118
    ResultStr += ClassDecl->getNameAsString();
1211
118
    ResultStr += "\n";
1212
118
    ResultStr += "#define _REWRITER_typedef_";
1213
118
    ResultStr += ClassDecl->getNameAsString();
1214
118
    ResultStr += "\n";
1215
118
    ResultStr += "typedef struct objc_object ";
1216
118
    ResultStr += ClassDecl->getNameAsString();
1217
118
    ResultStr += ";\n#endif\n";
1218
    // Mark this typedef as having been generated.
1219
118
    ObjCForwardDecls.insert(ClassDecl->getCanonicalDecl());
1220
118
  }
1221
118
  RewriteObjCInternalStruct(ClassDecl, ResultStr);
1222
1223
118
  for (auto *I : ClassDecl->instance_properties())
1224
20
    RewriteProperty(I);
1225
118
  for (auto *I : ClassDecl->instance_methods())
1226
92
    RewriteMethodDeclaration(I);
1227
118
  for (auto *I : ClassDecl->class_methods())
1228
11
    RewriteMethodDeclaration(I);
1229
1230
  // Lastly, comment out the @end.
1231
118
  ReplaceText(ClassDecl->getAtEndRange().getBegin(), strlen("@end"),
1232
118
              "/* @end */");
1233
118
}
1234
1235
14
Stmt *RewriteObjC::RewritePropertyOrImplicitSetter(PseudoObjectExpr *PseudoOp) {
1236
14
  SourceRange OldRange = PseudoOp->getSourceRange();
1237
1238
  // We just magically know some things about the structure of this
1239
  // expression.
1240
14
  ObjCMessageExpr *OldMsg =
1241
14
    cast<ObjCMessageExpr>(PseudoOp->getSemanticExpr(
1242
14
                            PseudoOp->getNumSemanticExprs() - 1));
1243
1244
  // Because the rewriter doesn't allow us to rewrite rewritten code,
1245
  // we need to suppress rewriting the sub-statements.
1246
14
  Expr *Base, *RHS;
1247
14
  {
1248
14
    DisableReplaceStmtScope S(*this);
1249
1250
    // Rebuild the base expression if we have one.
1251
14
    Base = nullptr;
1252
14
    if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1253
14
      Base = OldMsg->getInstanceReceiver();
1254
14
      Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
1255
14
      Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
1256
14
    }
1257
1258
    // Rebuild the RHS.
1259
14
    RHS = cast<BinaryOperator>(PseudoOp->getSyntacticForm())->getRHS();
1260
14
    RHS = cast<OpaqueValueExpr>(RHS)->getSourceExpr();
1261
14
    RHS = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(RHS));
1262
14
  }
1263
1264
  // TODO: avoid this copy.
1265
14
  SmallVector<SourceLocation, 1> SelLocs;
1266
14
  OldMsg->getSelectorLocs(SelLocs);
1267
1268
14
  ObjCMessageExpr *NewMsg = nullptr;
1269
14
  switch (OldMsg->getReceiverKind()) {
1270
0
  case ObjCMessageExpr::Class:
1271
0
    NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1272
0
                                     OldMsg->getValueKind(),
1273
0
                                     OldMsg->getLeftLoc(),
1274
0
                                     OldMsg->getClassReceiverTypeInfo(),
1275
0
                                     OldMsg->getSelector(),
1276
0
                                     SelLocs,
1277
0
                                     OldMsg->getMethodDecl(),
1278
0
                                     RHS,
1279
0
                                     OldMsg->getRightLoc(),
1280
0
                                     OldMsg->isImplicit());
1281
0
    break;
1282
1283
14
  case ObjCMessageExpr::Instance:
1284
14
    NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1285
14
                                     OldMsg->getValueKind(),
1286
14
                                     OldMsg->getLeftLoc(),
1287
14
                                     Base,
1288
14
                                     OldMsg->getSelector(),
1289
14
                                     SelLocs,
1290
14
                                     OldMsg->getMethodDecl(),
1291
14
                                     RHS,
1292
14
                                     OldMsg->getRightLoc(),
1293
14
                                     OldMsg->isImplicit());
1294
14
    break;
1295
1296
0
  case ObjCMessageExpr::SuperClass:
1297
0
  case ObjCMessageExpr::SuperInstance:
1298
0
    NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1299
0
                                     OldMsg->getValueKind(),
1300
0
                                     OldMsg->getLeftLoc(),
1301
0
                                     OldMsg->getSuperLoc(),
1302
0
                 OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1303
0
                                     OldMsg->getSuperType(),
1304
0
                                     OldMsg->getSelector(),
1305
0
                                     SelLocs,
1306
0
                                     OldMsg->getMethodDecl(),
1307
0
                                     RHS,
1308
0
                                     OldMsg->getRightLoc(),
1309
0
                                     OldMsg->isImplicit());
1310
0
    break;
1311
14
  }
1312
1313
14
  Stmt *Replacement = SynthMessageExpr(NewMsg);
1314
14
  ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
1315
14
  return Replacement;
1316
14
}
1317
1318
22
Stmt *RewriteObjC::RewritePropertyOrImplicitGetter(PseudoObjectExpr *PseudoOp) {
1319
22
  SourceRange OldRange = PseudoOp->getSourceRange();
1320
1321
  // We just magically know some things about the structure of this
1322
  // expression.
1323
22
  ObjCMessageExpr *OldMsg =
1324
22
    cast<ObjCMessageExpr>(PseudoOp->getResultExpr()->IgnoreImplicit());
1325
1326
  // Because the rewriter doesn't allow us to rewrite rewritten code,
1327
  // we need to suppress rewriting the sub-statements.
1328
22
  Expr *Base = nullptr;
1329
22
  {
1330
22
    DisableReplaceStmtScope S(*this);
1331
1332
    // Rebuild the base expression if we have one.
1333
22
    if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1334
22
      Base = OldMsg->getInstanceReceiver();
1335
22
      Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
1336
22
      Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
1337
22
    }
1338
22
  }
1339
1340
  // Intentionally empty.
1341
22
  SmallVector<SourceLocation, 1> SelLocs;
1342
22
  SmallVector<Expr*, 1> Args;
1343
1344
22
  ObjCMessageExpr *NewMsg = nullptr;
1345
22
  switch (OldMsg->getReceiverKind()) {
1346
0
  case ObjCMessageExpr::Class:
1347
0
    NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1348
0
                                     OldMsg->getValueKind(),
1349
0
                                     OldMsg->getLeftLoc(),
1350
0
                                     OldMsg->getClassReceiverTypeInfo(),
1351
0
                                     OldMsg->getSelector(),
1352
0
                                     SelLocs,
1353
0
                                     OldMsg->getMethodDecl(),
1354
0
                                     Args,
1355
0
                                     OldMsg->getRightLoc(),
1356
0
                                     OldMsg->isImplicit());
1357
0
    break;
1358
1359
22
  case ObjCMessageExpr::Instance:
1360
22
    NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1361
22
                                     OldMsg->getValueKind(),
1362
22
                                     OldMsg->getLeftLoc(),
1363
22
                                     Base,
1364
22
                                     OldMsg->getSelector(),
1365
22
                                     SelLocs,
1366
22
                                     OldMsg->getMethodDecl(),
1367
22
                                     Args,
1368
22
                                     OldMsg->getRightLoc(),
1369
22
                                     OldMsg->isImplicit());
1370
22
    break;
1371
1372
0
  case ObjCMessageExpr::SuperClass:
1373
0
  case ObjCMessageExpr::SuperInstance:
1374
0
    NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1375
0
                                     OldMsg->getValueKind(),
1376
0
                                     OldMsg->getLeftLoc(),
1377
0
                                     OldMsg->getSuperLoc(),
1378
0
                 OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1379
0
                                     OldMsg->getSuperType(),
1380
0
                                     OldMsg->getSelector(),
1381
0
                                     SelLocs,
1382
0
                                     OldMsg->getMethodDecl(),
1383
0
                                     Args,
1384
0
                                     OldMsg->getRightLoc(),
1385
0
                                     OldMsg->isImplicit());
1386
0
    break;
1387
22
  }
1388
1389
22
  Stmt *Replacement = SynthMessageExpr(NewMsg);
1390
22
  ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
1391
22
  return Replacement;
1392
22
}
1393
1394
/// SynthCountByEnumWithState - To print:
1395
/// ((unsigned int (*)
1396
///  (id, SEL, struct __objcFastEnumerationState *, id *, unsigned int))
1397
///  (void *)objc_msgSend)((id)l_collection,
1398
///                        sel_registerName(
1399
///                          "countByEnumeratingWithState:objects:count:"),
1400
///                        &enumState,
1401
///                        (id *)__rw_items, (unsigned int)16)
1402
///
1403
36
void RewriteObjC::SynthCountByEnumWithState(std::string &buf) {
1404
36
  buf += "((unsigned int (*) (id, SEL, struct __objcFastEnumerationState *, "
1405
36
  "id *, unsigned int))(void *)objc_msgSend)";
1406
36
  buf += "\n\t\t";
1407
36
  buf += "((id)l_collection,\n\t\t";
1408
36
  buf += "sel_registerName(\"countByEnumeratingWithState:objects:count:\"),";
1409
36
  buf += "\n\t\t";
1410
36
  buf += "&enumState, "
1411
36
         "(id *)__rw_items, (unsigned int)16)";
1412
36
}
1413
1414
/// RewriteBreakStmt - Rewrite for a break-stmt inside an ObjC2's foreach
1415
/// statement to exit to its outer synthesized loop.
1416
///
1417
6
Stmt *RewriteObjC::RewriteBreakStmt(BreakStmt *S) {
1418
6
  if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
1419
4
    return S;
1420
  // replace break with goto __break_label
1421
2
  std::string buf;
1422
1423
2
  SourceLocation startLoc = S->getBeginLoc();
1424
2
  buf = "goto __break_label_";
1425
2
  buf += utostr(ObjCBcLabelNo.back());
1426
2
  ReplaceText(startLoc, strlen("break"), buf);
1427
1428
2
  return nullptr;
1429
6
}
1430
1431
/// RewriteContinueStmt - Rewrite for a continue-stmt inside an ObjC2's foreach
1432
/// statement to continue with its inner synthesized loop.
1433
///
1434
2
Stmt *RewriteObjC::RewriteContinueStmt(ContinueStmt *S) {
1435
2
  if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
1436
0
    return S;
1437
  // replace continue with goto __continue_label
1438
2
  std::string buf;
1439
1440
2
  SourceLocation startLoc = S->getBeginLoc();
1441
2
  buf = "goto __continue_label_";
1442
2
  buf += utostr(ObjCBcLabelNo.back());
1443
2
  ReplaceText(startLoc, strlen("continue"), buf);
1444
1445
2
  return nullptr;
1446
2
}
1447
1448
/// RewriteObjCForCollectionStmt - Rewriter for ObjC2's foreach statement.
1449
///  It rewrites:
1450
/// for ( type elem in collection) { stmts; }
1451
1452
/// Into:
1453
/// {
1454
///   type elem;
1455
///   struct __objcFastEnumerationState enumState = { 0 };
1456
///   id __rw_items[16];
1457
///   id l_collection = (id)collection;
1458
///   unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
1459
///                                       objects:__rw_items count:16];
1460
/// if (limit) {
1461
///   unsigned long startMutations = *enumState.mutationsPtr;
1462
///   do {
1463
///        unsigned long counter = 0;
1464
///        do {
1465
///             if (startMutations != *enumState.mutationsPtr)
1466
///               objc_enumerationMutation(l_collection);
1467
///             elem = (type)enumState.itemsPtr[counter++];
1468
///             stmts;
1469
///             __continue_label: ;
1470
///        } while (counter < limit);
1471
///   } while (limit = [l_collection countByEnumeratingWithState:&enumState
1472
///                                  objects:__rw_items count:16]);
1473
///   elem = nil;
1474
///   __break_label: ;
1475
///  }
1476
///  else
1477
///       elem = nil;
1478
///  }
1479
///
1480
Stmt *RewriteObjC::RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
1481
18
                                                SourceLocation OrigEnd) {
1482
18
  assert(!Stmts.empty() && "ObjCForCollectionStmt - Statement stack empty");
1483
0
  assert(isa<ObjCForCollectionStmt>(Stmts.back()) &&
1484
18
         "ObjCForCollectionStmt Statement stack mismatch");
1485
0
  assert(!ObjCBcLabelNo.empty() &&
1486
18
         "ObjCForCollectionStmt - Label No stack empty");
1487
1488
0
  SourceLocation startLoc = S->getBeginLoc();
1489
18
  const char *startBuf = SM->getCharacterData(startLoc);
1490
18
  StringRef elementName;
1491
18
  std::string elementTypeAsString;
1492
18
  std::string buf;
1493
18
  buf = "\n{\n\t";
1494
18
  if (DeclStmt *DS = dyn_cast<DeclStmt>(S->getElement())) {
1495
    // type elem;
1496
9
    NamedDecl* D = cast<NamedDecl>(DS->getSingleDecl());
1497
9
    QualType ElementType = cast<ValueDecl>(D)->getType();
1498
9
    if (ElementType->isObjCQualifiedIdType() ||
1499
9
        
ElementType->isObjCQualifiedInterfaceType()8
)
1500
      // Simply use 'id' for all qualified types.
1501
1
      elementTypeAsString = "id";
1502
8
    else
1503
8
      elementTypeAsString = ElementType.getAsString(Context->getPrintingPolicy());
1504
9
    buf += elementTypeAsString;
1505
9
    buf += " ";
1506
9
    elementName = D->getName();
1507
9
    buf += elementName;
1508
9
    buf += ";\n\t";
1509
9
  }
1510
9
  else {
1511
9
    DeclRefExpr *DR = cast<DeclRefExpr>(S->getElement());
1512
9
    elementName = DR->getDecl()->getName();
1513
9
    ValueDecl *VD = DR->getDecl();
1514
9
    if (VD->getType()->isObjCQualifiedIdType() ||
1515
9
        VD->getType()->isObjCQualifiedInterfaceType())
1516
      // Simply use 'id' for all qualified types.
1517
0
      elementTypeAsString = "id";
1518
9
    else
1519
9
      elementTypeAsString = VD->getType().getAsString(Context->getPrintingPolicy());
1520
9
  }
1521
1522
  // struct __objcFastEnumerationState enumState = { 0 };
1523
18
  buf += "struct __objcFastEnumerationState enumState = { 0 };\n\t";
1524
  // id __rw_items[16];
1525
18
  buf += "id __rw_items[16];\n\t";
1526
  // id l_collection = (id)
1527
18
  buf += "id l_collection = (id)";
1528
  // Find start location of 'collection' the hard way!
1529
18
  const char *startCollectionBuf = startBuf;
1530
18
  startCollectionBuf += 3;  // skip 'for'
1531
18
  startCollectionBuf = strchr(startCollectionBuf, '(');
1532
18
  startCollectionBuf++; // skip '('
1533
  // find 'in' and skip it.
1534
151
  while (*startCollectionBuf != ' ' ||
1535
151
         
*(startCollectionBuf+1) != 'i'29
||
*(startCollectionBuf+2) != 'n'18
||
1536
151
         
(18
*(startCollectionBuf+3) != ' '18
&&
1537
18
          
*(startCollectionBuf+3) != '['3
&&
*(startCollectionBuf+3) != '('1
))
1538
133
    startCollectionBuf++;
1539
18
  startCollectionBuf += 3;
1540
1541
  // Replace: "for (type element in" with string constructed thus far.
1542
18
  ReplaceText(startLoc, startCollectionBuf - startBuf, buf);
1543
  // Replace ')' in for '(' type elem in collection ')' with ';'
1544
18
  SourceLocation rightParenLoc = S->getRParenLoc();
1545
18
  const char *rparenBuf = SM->getCharacterData(rightParenLoc);
1546
18
  SourceLocation lparenLoc = startLoc.getLocWithOffset(rparenBuf-startBuf);
1547
18
  buf = ";\n\t";
1548
1549
  // unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
1550
  //                                   objects:__rw_items count:16];
1551
  // which is synthesized into:
1552
  // unsigned int limit =
1553
  // ((unsigned int (*)
1554
  //  (id, SEL, struct __objcFastEnumerationState *, id *, unsigned int))
1555
  //  (void *)objc_msgSend)((id)l_collection,
1556
  //                        sel_registerName(
1557
  //                          "countByEnumeratingWithState:objects:count:"),
1558
  //                        (struct __objcFastEnumerationState *)&state,
1559
  //                        (id *)__rw_items, (unsigned int)16);
1560
18
  buf += "unsigned long limit =\n\t\t";
1561
18
  SynthCountByEnumWithState(buf);
1562
18
  buf += ";\n\t";
1563
  /// if (limit) {
1564
  ///   unsigned long startMutations = *enumState.mutationsPtr;
1565
  ///   do {
1566
  ///        unsigned long counter = 0;
1567
  ///        do {
1568
  ///             if (startMutations != *enumState.mutationsPtr)
1569
  ///               objc_enumerationMutation(l_collection);
1570
  ///             elem = (type)enumState.itemsPtr[counter++];
1571
18
  buf += "if (limit) {\n\t";
1572
18
  buf += "unsigned long startMutations = *enumState.mutationsPtr;\n\t";
1573
18
  buf += "do {\n\t\t";
1574
18
  buf += "unsigned long counter = 0;\n\t\t";
1575
18
  buf += "do {\n\t\t\t";
1576
18
  buf += "if (startMutations != *enumState.mutationsPtr)\n\t\t\t\t";
1577
18
  buf += "objc_enumerationMutation(l_collection);\n\t\t\t";
1578
18
  buf += elementName;
1579
18
  buf += " = (";
1580
18
  buf += elementTypeAsString;
1581
18
  buf += ")enumState.itemsPtr[counter++];";
1582
  // Replace ')' in for '(' type elem in collection ')' with all of these.
1583
18
  ReplaceText(lparenLoc, 1, buf);
1584
1585
  ///            __continue_label: ;
1586
  ///        } while (counter < limit);
1587
  ///   } while (limit = [l_collection countByEnumeratingWithState:&enumState
1588
  ///                                  objects:__rw_items count:16]);
1589
  ///   elem = nil;
1590
  ///   __break_label: ;
1591
  ///  }
1592
  ///  else
1593
  ///       elem = nil;
1594
  ///  }
1595
  ///
1596
18
  buf = ";\n\t";
1597
18
  buf += "__continue_label_";
1598
18
  buf += utostr(ObjCBcLabelNo.back());
1599
18
  buf += ": ;";
1600
18
  buf += "\n\t\t";
1601
18
  buf += "} while (counter < limit);\n\t";
1602
18
  buf += "} while (limit = ";
1603
18
  SynthCountByEnumWithState(buf);
1604
18
  buf += ");\n\t";
1605
18
  buf += elementName;
1606
18
  buf += " = ((";
1607
18
  buf += elementTypeAsString;
1608
18
  buf += ")0);\n\t";
1609
18
  buf += "__break_label_";
1610
18
  buf += utostr(ObjCBcLabelNo.back());
1611
18
  buf += ": ;\n\t";
1612
18
  buf += "}\n\t";
1613
18
  buf += "else\n\t\t";
1614
18
  buf += elementName;
1615
18
  buf += " = ((";
1616
18
  buf += elementTypeAsString;
1617
18
  buf += ")0);\n\t";
1618
18
  buf += "}\n";
1619
1620
  // Insert all these *after* the statement body.
1621
  // FIXME: If this should support Obj-C++, support CXXTryStmt
1622
18
  if (isa<CompoundStmt>(S->getBody())) {
1623
12
    SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(1);
1624
12
    InsertText(endBodyLoc, buf);
1625
12
  } else {
1626
    /* Need to treat single statements specially. For example:
1627
     *
1628
     *     for (A *a in b) if (stuff()) break;
1629
     *     for (A *a in b) xxxyy;
1630
     *
1631
     * The following code simply scans ahead to the semi to find the actual end.
1632
     */
1633
6
    const char *stmtBuf = SM->getCharacterData(OrigEnd);
1634
6
    const char *semiBuf = strchr(stmtBuf, ';');
1635
6
    assert(semiBuf && "Can't find ';'");
1636
0
    SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(semiBuf-stmtBuf+1);
1637
6
    InsertText(endBodyLoc, buf);
1638
6
  }
1639
0
  Stmts.pop_back();
1640
18
  ObjCBcLabelNo.pop_back();
1641
18
  return nullptr;
1642
18
}
1643
1644
/// RewriteObjCSynchronizedStmt -
1645
/// This routine rewrites @synchronized(expr) stmt;
1646
/// into:
1647
/// objc_sync_enter(expr);
1648
/// @try stmt @finally { objc_sync_exit(expr); }
1649
///
1650
3
Stmt *RewriteObjC::RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
1651
  // Get the start location and compute the semi location.
1652
3
  SourceLocation startLoc = S->getBeginLoc();
1653
3
  const char *startBuf = SM->getCharacterData(startLoc);
1654
1655
3
  assert((*startBuf == '@') && "bogus @synchronized location");
1656
1657
0
  std::string buf;
1658
3
  buf = "objc_sync_enter((id)";
1659
3
  const char *lparenBuf = startBuf;
1660
45
  while (*lparenBuf != '(') 
lparenBuf++42
;
1661
3
  ReplaceText(startLoc, lparenBuf-startBuf+1, buf);
1662
  // We can't use S->getSynchExpr()->getEndLoc() to find the end location, since
1663
  // the sync expression is typically a message expression that's already
1664
  // been rewritten! (which implies the SourceLocation's are invalid).
1665
3
  SourceLocation endLoc = S->getSynchBody()->getBeginLoc();
1666
3
  const char *endBuf = SM->getCharacterData(endLoc);
1667
9
  while (*endBuf != ')') 
endBuf--6
;
1668
3
  SourceLocation rparenLoc = startLoc.getLocWithOffset(endBuf-startBuf);
1669
3
  buf = ");\n";
1670
  // declare a new scope with two variables, _stack and _rethrow.
1671
3
  buf += "/* @try scope begin */ \n{ struct _objc_exception_data {\n";
1672
3
  buf += "int buf[18/*32-bit i386*/];\n";
1673
3
  buf += "char *pointers[4];} _stack;\n";
1674
3
  buf += "id volatile _rethrow = 0;\n";
1675
3
  buf += "objc_exception_try_enter(&_stack);\n";
1676
3
  buf += "if (!_setjmp(_stack.buf)) /* @try block continue */\n";
1677
3
  ReplaceText(rparenLoc, 1, buf);
1678
3
  startLoc = S->getSynchBody()->getEndLoc();
1679
3
  startBuf = SM->getCharacterData(startLoc);
1680
1681
3
  assert((*startBuf == '}') && "bogus @synchronized block");
1682
0
  SourceLocation lastCurlyLoc = startLoc;
1683
3
  buf = "}\nelse {\n";
1684
3
  buf += "  _rethrow = objc_exception_extract(&_stack);\n";
1685
3
  buf += "}\n";
1686
3
  buf += "{ /* implicit finally clause */\n";
1687
3
  buf += "  if (!_rethrow) objc_exception_try_exit(&_stack);\n";
1688
1689
3
  std::string syncBuf;
1690
3
  syncBuf += " objc_sync_exit(";
1691
1692
3
  Expr *syncExpr = S->getSynchExpr();
1693
3
  CastKind CK = syncExpr->getType()->isObjCObjectPointerType()
1694
3
                  ? CK_BitCast :
1695
3
                
syncExpr->getType()->isBlockPointerType()0
1696
0
                  ? CK_BlockPointerToObjCPointerCast
1697
0
                  : CK_CPointerToObjCPointerCast;
1698
3
  syncExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
1699
3
                                      CK, syncExpr);
1700
3
  std::string syncExprBufS;
1701
3
  llvm::raw_string_ostream syncExprBuf(syncExprBufS);
1702
3
  assert(syncExpr != nullptr && "Expected non-null Expr");
1703
0
  syncExpr->printPretty(syncExprBuf, nullptr, PrintingPolicy(LangOpts));
1704
3
  syncBuf += syncExprBuf.str();
1705
3
  syncBuf += ");";
1706
1707
3
  buf += syncBuf;
1708
3
  buf += "\n  if (_rethrow) objc_exception_throw(_rethrow);\n";
1709
3
  buf += "}\n";
1710
3
  buf += "}";
1711
1712
3
  ReplaceText(lastCurlyLoc, 1, buf);
1713
1714
3
  bool hasReturns = false;
1715
3
  HasReturnStmts(S->getSynchBody(), hasReturns);
1716
3
  if (hasReturns)
1717
3
    RewriteSyncReturnStmts(S->getSynchBody(), syncBuf);
1718
1719
3
  return nullptr;
1720
3
}
1721
1722
void RewriteObjC::WarnAboutReturnGotoStmts(Stmt *S)
1723
26
{
1724
  // Perform a bottom up traversal of all children.
1725
26
  for (Stmt *SubStmt : S->children())
1726
22
    if (SubStmt)
1727
22
      WarnAboutReturnGotoStmts(SubStmt);
1728
1729
26
  if (isa<ReturnStmt>(S) || 
isa<GotoStmt>(S)25
) {
1730
1
    Diags.Report(Context->getFullLoc(S->getBeginLoc()),
1731
1
                 TryFinallyContainsReturnDiag);
1732
1
  }
1733
26
}
1734
1735
void RewriteObjC::HasReturnStmts(Stmt *S, bool &hasReturns)
1736
23
{
1737
  // Perform a bottom up traversal of all children.
1738
23
  for (Stmt *SubStmt : S->children())
1739
16
    if (SubStmt)
1740
16
      HasReturnStmts(SubStmt, hasReturns);
1741
1742
23
  if (isa<ReturnStmt>(S))
1743
4
    hasReturns = true;
1744
23
}
1745
1746
2
void RewriteObjC::RewriteTryReturnStmts(Stmt *S) {
1747
  // Perform a bottom up traversal of all children.
1748
2
  for (Stmt *SubStmt : S->children())
1749
1
    if (SubStmt) {
1750
1
      RewriteTryReturnStmts(SubStmt);
1751
1
    }
1752
2
  if (isa<ReturnStmt>(S)) {
1753
1
    SourceLocation startLoc = S->getBeginLoc();
1754
1
    const char *startBuf = SM->getCharacterData(startLoc);
1755
1
    const char *semiBuf = strchr(startBuf, ';');
1756
1
    assert((*semiBuf == ';') && "RewriteTryReturnStmts: can't find ';'");
1757
0
    SourceLocation onePastSemiLoc = startLoc.getLocWithOffset(semiBuf-startBuf+1);
1758
1759
1
    std::string buf;
1760
1
    buf = "{ objc_exception_try_exit(&_stack); return";
1761
1762
1
    ReplaceText(startLoc, 6, buf);
1763
1
    InsertText(onePastSemiLoc, "}");
1764
1
  }
1765
2
}
1766
1767
12
void RewriteObjC::RewriteSyncReturnStmts(Stmt *S, std::string syncExitBuf) {
1768
  // Perform a bottom up traversal of all children.
1769
12
  for (Stmt *SubStmt : S->children())
1770
9
    if (SubStmt) {
1771
9
      RewriteSyncReturnStmts(SubStmt, syncExitBuf);
1772
9
    }
1773
12
  if (isa<ReturnStmt>(S)) {
1774
3
    SourceLocation startLoc = S->getBeginLoc();
1775
3
    const char *startBuf = SM->getCharacterData(startLoc);
1776
1777
3
    const char *semiBuf = strchr(startBuf, ';');
1778
3
    assert((*semiBuf == ';') && "RewriteSyncReturnStmts: can't find ';'");
1779
0
    SourceLocation onePastSemiLoc = startLoc.getLocWithOffset(semiBuf-startBuf+1);
1780
1781
3
    std::string buf;
1782
3
    buf = "{ objc_exception_try_exit(&_stack);";
1783
3
    buf += syncExitBuf;
1784
3
    buf += " return";
1785
1786
3
    ReplaceText(startLoc, 6, buf);
1787
3
    InsertText(onePastSemiLoc, "}");
1788
3
  }
1789
12
}
1790
1791
8
Stmt *RewriteObjC::RewriteObjCTryStmt(ObjCAtTryStmt *S) {
1792
  // Get the start location and compute the semi location.
1793
8
  SourceLocation startLoc = S->getBeginLoc();
1794
8
  const char *startBuf = SM->getCharacterData(startLoc);
1795
1796
8
  assert((*startBuf == '@') && "bogus @try location");
1797
1798
0
  std::string buf;
1799
  // declare a new scope with two variables, _stack and _rethrow.
1800
8
  buf = "/* @try scope begin */ { struct _objc_exception_data {\n";
1801
8
  buf += "int buf[18/*32-bit i386*/];\n";
1802
8
  buf += "char *pointers[4];} _stack;\n";
1803
8
  buf += "id volatile _rethrow = 0;\n";
1804
8
  buf += "objc_exception_try_enter(&_stack);\n";
1805
8
  buf += "if (!_setjmp(_stack.buf)) /* @try block continue */\n";
1806
1807
8
  ReplaceText(startLoc, 4, buf);
1808
1809
8
  startLoc = S->getTryBody()->getEndLoc();
1810
8
  startBuf = SM->getCharacterData(startLoc);
1811
1812
8
  assert((*startBuf == '}') && "bogus @try block");
1813
1814
0
  SourceLocation lastCurlyLoc = startLoc;
1815
8
  if (S->getNumCatchStmts()) {
1816
4
    startLoc = startLoc.getLocWithOffset(1);
1817
4
    buf = " /* @catch begin */ else {\n";
1818
4
    buf += " id _caught = objc_exception_extract(&_stack);\n";
1819
4
    buf += " objc_exception_try_enter (&_stack);\n";
1820
4
    buf += " if (_setjmp(_stack.buf))\n";
1821
4
    buf += "   _rethrow = objc_exception_extract(&_stack);\n";
1822
4
    buf += " else { /* @catch continue */";
1823
1824
4
    InsertText(startLoc, buf);
1825
4
  } else { /* no catch list */
1826
4
    buf = "}\nelse {\n";
1827
4
    buf += "  _rethrow = objc_exception_extract(&_stack);\n";
1828
4
    buf += "}";
1829
4
    ReplaceText(lastCurlyLoc, 1, buf);
1830
4
  }
1831
8
  Stmt *lastCatchBody = nullptr;
1832
14
  for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; 
++I6
) {
1833
6
    ObjCAtCatchStmt *Catch = S->getCatchStmt(I);
1834
6
    VarDecl *catchDecl = Catch->getCatchParamDecl();
1835
1836
6
    if (I == 0)
1837
4
      buf = "if ("; // we are generating code for the first catch clause
1838
2
    else
1839
2
      buf = "else if (";
1840
6
    startLoc = Catch->getBeginLoc();
1841
6
    startBuf = SM->getCharacterData(startLoc);
1842
1843
6
    assert((*startBuf == '@') && "bogus @catch location");
1844
1845
0
    const char *lParenLoc = strchr(startBuf, '(');
1846
1847
6
    if (Catch->hasEllipsis()) {
1848
      // Now rewrite the body...
1849
2
      lastCatchBody = Catch->getCatchBody();
1850
2
      SourceLocation bodyLoc = lastCatchBody->getBeginLoc();
1851
2
      const char *bodyBuf = SM->getCharacterData(bodyLoc);
1852
2
      assert(*SM->getCharacterData(Catch->getRParenLoc()) == ')' &&
1853
2
             "bogus @catch paren location");
1854
0
      assert((*bodyBuf == '{') && "bogus @catch body location");
1855
1856
0
      buf += "1) { id _tmp = _caught;";
1857
2
      Rewrite.ReplaceText(startLoc, bodyBuf-startBuf+1, buf);
1858
4
    } else if (catchDecl) {
1859
4
      QualType t = catchDecl->getType();
1860
4
      if (t == Context->getObjCIdType()) {
1861
1
        buf += "1) { ";
1862
1
        ReplaceText(startLoc, lParenLoc-startBuf+1, buf);
1863
3
      } else if (const ObjCObjectPointerType *Ptr =
1864
3
                   t->getAs<ObjCObjectPointerType>()) {
1865
        // Should be a pointer to a class.
1866
3
        ObjCInterfaceDecl *IDecl = Ptr->getObjectType()->getInterface();
1867
3
        if (IDecl) {
1868
3
          buf += "objc_exception_match((struct objc_class *)objc_getClass(\"";
1869
3
          buf += IDecl->getNameAsString();
1870
3
          buf += "\"), (struct objc_object *)_caught)) { ";
1871
3
          ReplaceText(startLoc, lParenLoc-startBuf+1, buf);
1872
3
        }
1873
3
      }
1874
      // Now rewrite the body...
1875
4
      lastCatchBody = Catch->getCatchBody();
1876
4
      SourceLocation rParenLoc = Catch->getRParenLoc();
1877
4
      SourceLocation bodyLoc = lastCatchBody->getBeginLoc();
1878
4
      const char *bodyBuf = SM->getCharacterData(bodyLoc);
1879
4
      const char *rParenBuf = SM->getCharacterData(rParenLoc);
1880
4
      assert((*rParenBuf == ')') && "bogus @catch paren location");
1881
0
      assert((*bodyBuf == '{') && "bogus @catch body location");
1882
1883
      // Here we replace ") {" with "= _caught;" (which initializes and
1884
      // declares the @catch parameter).
1885
0
      ReplaceText(rParenLoc, bodyBuf-rParenBuf+1, " = _caught;");
1886
4
    } else {
1887
0
      llvm_unreachable("@catch rewrite bug");
1888
0
    }
1889
6
  }
1890
  // Complete the catch list...
1891
8
  if (lastCatchBody) {
1892
4
    SourceLocation bodyLoc = lastCatchBody->getEndLoc();
1893
4
    assert(*SM->getCharacterData(bodyLoc) == '}' &&
1894
4
           "bogus @catch body location");
1895
1896
    // Insert the last (implicit) else clause *before* the right curly brace.
1897
0
    bodyLoc = bodyLoc.getLocWithOffset(-1);
1898
4
    buf = "} /* last catch end */\n";
1899
4
    buf += "else {\n";
1900
4
    buf += " _rethrow = _caught;\n";
1901
4
    buf += " objc_exception_try_exit(&_stack);\n";
1902
4
    buf += "} } /* @catch end */\n";
1903
4
    if (!S->getFinallyStmt())
1904
4
      buf += "}\n";
1905
4
    InsertText(bodyLoc, buf);
1906
1907
    // Set lastCurlyLoc
1908
4
    lastCurlyLoc = lastCatchBody->getEndLoc();
1909
4
  }
1910
8
  if (ObjCAtFinallyStmt *finalStmt = S->getFinallyStmt()) {
1911
4
    startLoc = finalStmt->getBeginLoc();
1912
4
    startBuf = SM->getCharacterData(startLoc);
1913
4
    assert((*startBuf == '@') && "bogus @finally start");
1914
1915
0
    ReplaceText(startLoc, 8, "/* @finally */");
1916
1917
4
    Stmt *body = finalStmt->getFinallyBody();
1918
4
    SourceLocation startLoc = body->getBeginLoc();
1919
4
    SourceLocation endLoc = body->getEndLoc();
1920
4
    assert(*SM->getCharacterData(startLoc) == '{' &&
1921
4
           "bogus @finally body location");
1922
0
    assert(*SM->getCharacterData(endLoc) == '}' &&
1923
4
           "bogus @finally body location");
1924
1925
0
    startLoc = startLoc.getLocWithOffset(1);
1926
4
    InsertText(startLoc, " if (!_rethrow) objc_exception_try_exit(&_stack);\n");
1927
4
    endLoc = endLoc.getLocWithOffset(-1);
1928
4
    InsertText(endLoc, " if (_rethrow) objc_exception_throw(_rethrow);\n");
1929
1930
    // Set lastCurlyLoc
1931
4
    lastCurlyLoc = body->getEndLoc();
1932
1933
    // Now check for any return/continue/go statements within the @try.
1934
4
    WarnAboutReturnGotoStmts(S->getTryBody());
1935
4
  } else { /* no finally clause - make sure we synthesize an implicit one */
1936
4
    buf = "{ /* implicit finally clause */\n";
1937
4
    buf += " if (!_rethrow) objc_exception_try_exit(&_stack);\n";
1938
4
    buf += " if (_rethrow) objc_exception_throw(_rethrow);\n";
1939
4
    buf += "}";
1940
4
    ReplaceText(lastCurlyLoc, 1, buf);
1941
1942
    // Now check for any return/continue/go statements within the @try.
1943
    // The implicit finally clause won't called if the @try contains any
1944
    // jump statements.
1945
4
    bool hasReturns = false;
1946
4
    HasReturnStmts(S->getTryBody(), hasReturns);
1947
4
    if (hasReturns)
1948
1
      RewriteTryReturnStmts(S->getTryBody());
1949
4
  }
1950
  // Now emit the final closing curly brace...
1951
0
  lastCurlyLoc = lastCurlyLoc.getLocWithOffset(1);
1952
8
  InsertText(lastCurlyLoc, " } /* @try scope end */\n");
1953
8
  return nullptr;
1954
8
}
1955
1956
// This can't be done with ReplaceStmt(S, ThrowExpr), since
1957
// the throw expression is typically a message expression that's already
1958
// been rewritten! (which implies the SourceLocation's are invalid).
1959
2
Stmt *RewriteObjC::RewriteObjCThrowStmt(ObjCAtThrowStmt *S) {
1960
  // Get the start location and compute the semi location.
1961
2
  SourceLocation startLoc = S->getBeginLoc();
1962
2
  const char *startBuf = SM->getCharacterData(startLoc);
1963
1964
2
  assert((*startBuf == '@') && "bogus @throw location");
1965
1966
0
  std::string buf;
1967
  /* void objc_exception_throw(id) __attribute__((noreturn)); */
1968
2
  if (S->getThrowExpr())
1969
0
    buf = "objc_exception_throw(";
1970
2
  else // add an implicit argument
1971
2
    buf = "objc_exception_throw(_caught";
1972
1973
  // handle "@  throw" correctly.
1974
2
  const char *wBuf = strchr(startBuf, 'w');
1975
2
  assert((*wBuf == 'w') && "@throw: can't find 'w'");
1976
0
  ReplaceText(startLoc, wBuf-startBuf+1, buf);
1977
1978
2
  const char *semiBuf = strchr(startBuf, ';');
1979
2
  assert((*semiBuf == ';') && "@throw: can't find ';'");
1980
0
  SourceLocation semiLoc = startLoc.getLocWithOffset(semiBuf-startBuf);
1981
2
  ReplaceText(semiLoc, 1, ");");
1982
2
  return nullptr;
1983
2
}
1984
1985
3
Stmt *RewriteObjC::RewriteAtEncode(ObjCEncodeExpr *Exp) {
1986
  // Create a new string expression.
1987
3
  std::string StrEncoding;
1988
3
  Context->getObjCEncodingForType(Exp->getEncodedType(), StrEncoding);
1989
3
  Expr *Replacement = getStringLiteral(StrEncoding);
1990
3
  ReplaceStmt(Exp, Replacement);
1991
1992
  // Replace this subexpr in the parent.
1993
  // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
1994
3
  return Replacement;
1995
3
}
1996
1997
1
Stmt *RewriteObjC::RewriteAtSelector(ObjCSelectorExpr *Exp) {
1998
1
  if (!SelGetUidFunctionDecl)
1999
1
    SynthSelGetUidFunctionDecl();
2000
1
  assert(SelGetUidFunctionDecl && "Can't find sel_registerName() decl");
2001
  // Create a call to sel_registerName("selName").
2002
0
  SmallVector<Expr*, 8> SelExprs;
2003
1
  SelExprs.push_back(getStringLiteral(Exp->getSelector().getAsString()));
2004
1
  CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2005
1
                                                  SelExprs);
2006
1
  ReplaceStmt(Exp, SelExp);
2007
  // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2008
1
  return SelExp;
2009
1
}
2010
2011
CallExpr *
2012
RewriteObjC::SynthesizeCallToFunctionDecl(FunctionDecl *FD,
2013
                                          ArrayRef<Expr *> Args,
2014
                                          SourceLocation StartLoc,
2015
139
                                          SourceLocation EndLoc) {
2016
  // Get the type, we will need to reference it in a couple spots.
2017
139
  QualType msgSendType = FD->getType();
2018
2019
  // Create a reference to the objc_msgSend() declaration.
2020
139
  DeclRefExpr *DRE = new (Context) DeclRefExpr(*Context, FD, false, msgSendType,
2021
139
                                               VK_LValue, SourceLocation());
2022
2023
  // Now, we cast the reference to a pointer to the objc_msgSend type.
2024
139
  QualType pToFunc = Context->getPointerType(msgSendType);
2025
139
  ImplicitCastExpr *ICE =
2026
139
      ImplicitCastExpr::Create(*Context, pToFunc, CK_FunctionToPointerDecay,
2027
139
                               DRE, nullptr, VK_PRValue, FPOptionsOverride());
2028
2029
139
  const auto *FT = msgSendType->castAs<FunctionType>();
2030
2031
139
  CallExpr *Exp =
2032
139
      CallExpr::Create(*Context, ICE, Args, FT->getCallResultType(*Context),
2033
139
                       VK_PRValue, EndLoc, FPOptionsOverride());
2034
139
  return Exp;
2035
139
}
2036
2037
static bool scanForProtocolRefs(const char *startBuf, const char *endBuf,
2038
26
                                const char *&startRef, const char *&endRef) {
2039
360
  while (startBuf < endBuf) {
2040
360
    if (*startBuf == '<')
2041
26
      startRef = startBuf; // mark the start.
2042
360
    if (*startBuf == '>') {
2043
26
      if (startRef && *startRef == '<') {
2044
26
        endRef = startBuf; // mark the end.
2045
26
        return true;
2046
26
      }
2047
0
      return false;
2048
26
    }
2049
334
    startBuf++;
2050
334
  }
2051
0
  return false;
2052
26
}
2053
2054
6
static void scanToNextArgument(const char *&argRef) {
2055
6
  int angle = 0;
2056
147
  while (*argRef != ')' && 
(144
*argRef != ','144
||
angle > 05
)) {
2057
141
    if (*argRef == '<')
2058
6
      angle++;
2059
135
    else if (*argRef == '>')
2060
6
      angle--;
2061
141
    argRef++;
2062
141
  }
2063
6
  assert(angle == 0 && "scanToNextArgument - bad protocol type syntax");
2064
6
}
2065
2066
371
bool RewriteObjC::needToScanForQualifiers(QualType T) {
2067
371
  if (T->isObjCQualifiedIdType())
2068
9
    return true;
2069
362
  if (const PointerType *PT = T->getAs<PointerType>()) {
2070
37
    if (PT->getPointeeType()->isObjCQualifiedIdType())
2071
1
      return true;
2072
37
  }
2073
361
  if (T->isObjCObjectPointerType()) {
2074
113
    T = T->getPointeeType();
2075
113
    return T->isObjCQualifiedInterfaceType();
2076
113
  }
2077
248
  if (T->isArrayType()) {
2078
3
    QualType ElemTy = Context->getBaseElementType(T);
2079
3
    return needToScanForQualifiers(ElemTy);
2080
3
  }
2081
245
  return false;
2082
248
}
2083
2084
31
void RewriteObjC::RewriteObjCQualifiedInterfaceTypes(Expr *E) {
2085
31
  QualType Type = E->getType();
2086
31
  if (needToScanForQualifiers(Type)) {
2087
7
    SourceLocation Loc, EndLoc;
2088
2089
7
    if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E)) {
2090
7
      Loc = ECE->getLParenLoc();
2091
7
      EndLoc = ECE->getRParenLoc();
2092
7
    } else {
2093
0
      Loc = E->getBeginLoc();
2094
0
      EndLoc = E->getEndLoc();
2095
0
    }
2096
    // This will defend against trying to rewrite synthesized expressions.
2097
7
    if (Loc.isInvalid() || EndLoc.isInvalid())
2098
0
      return;
2099
2100
7
    const char *startBuf = SM->getCharacterData(Loc);
2101
7
    const char *endBuf = SM->getCharacterData(EndLoc);
2102
7
    const char *startRef = nullptr, *endRef = nullptr;
2103
7
    if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2104
      // Get the locations of the startRef, endRef.
2105
7
      SourceLocation LessLoc = Loc.getLocWithOffset(startRef-startBuf);
2106
7
      SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-startBuf+1);
2107
      // Comment out the protocol references.
2108
7
      InsertText(LessLoc, "/*");
2109
7
      InsertText(GreaterLoc, "*/");
2110
7
    }
2111
7
  }
2112
31
}
2113
2114
265
void RewriteObjC::RewriteObjCQualifiedInterfaceTypes(Decl *Dcl) {
2115
265
  SourceLocation Loc;
2116
265
  QualType Type;
2117
265
  const FunctionProtoType *proto = nullptr;
2118
265
  if (VarDecl *VD = dyn_cast<VarDecl>(Dcl)) {
2119
149
    Loc = VD->getLocation();
2120
149
    Type = VD->getType();
2121
149
  }
2122
116
  else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Dcl)) {
2123
115
    Loc = FD->getLocation();
2124
    // Check for ObjC 'id' and class types that have been adorned with protocol
2125
    // information (id<p>, C<p>*). The protocol references need to be rewritten!
2126
115
    const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2127
115
    assert(funcType && "missing function type");
2128
0
    proto = dyn_cast<FunctionProtoType>(funcType);
2129
115
    if (!proto)
2130
23
      return;
2131
92
    Type = proto->getReturnType();
2132
92
  }
2133
1
  else if (FieldDecl *FD = dyn_cast<FieldDecl>(Dcl)) {
2134
1
    Loc = FD->getLocation();
2135
1
    Type = FD->getType();
2136
1
  }
2137
0
  else
2138
0
    return;
2139
2140
242
  if (needToScanForQualifiers(Type)) {
2141
    // Since types are unique, we need to scan the buffer.
2142
2143
13
    const char *endBuf = SM->getCharacterData(Loc);
2144
13
    const char *startBuf = endBuf;
2145
217
    while (*startBuf != ';' && *startBuf != '<' && 
startBuf != MainFileStart204
)
2146
204
      startBuf--; // scan backward (from the decl location) for return type.
2147
13
    const char *startRef = nullptr, *endRef = nullptr;
2148
13
    if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2149
      // Get the locations of the startRef, endRef.
2150
13
      SourceLocation LessLoc = Loc.getLocWithOffset(startRef-endBuf);
2151
13
      SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-endBuf+1);
2152
      // Comment out the protocol references.
2153
13
      InsertText(LessLoc, "/*");
2154
13
      InsertText(GreaterLoc, "*/");
2155
13
    }
2156
13
  }
2157
242
  if (!proto)
2158
150
      return; // most likely, was a variable
2159
  // Now check arguments.
2160
92
  const char *startBuf = SM->getCharacterData(Loc);
2161
92
  const char *startFuncBuf = startBuf;
2162
172
  for (unsigned i = 0; i < proto->getNumParams(); 
i++80
) {
2163
80
    if (needToScanForQualifiers(proto->getParamType(i))) {
2164
      // Since types are unique, we need to scan the buffer.
2165
2166
6
      const char *endBuf = startBuf;
2167
      // scan forward (from the decl location) for argument types.
2168
6
      scanToNextArgument(endBuf);
2169
6
      const char *startRef = nullptr, *endRef = nullptr;
2170
6
      if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2171
        // Get the locations of the startRef, endRef.
2172
6
        SourceLocation LessLoc =
2173
6
          Loc.getLocWithOffset(startRef-startFuncBuf);
2174
6
        SourceLocation GreaterLoc =
2175
6
          Loc.getLocWithOffset(endRef-startFuncBuf+1);
2176
        // Comment out the protocol references.
2177
6
        InsertText(LessLoc, "/*");
2178
6
        InsertText(GreaterLoc, "*/");
2179
6
      }
2180
6
      startBuf = ++endBuf;
2181
6
    }
2182
74
    else {
2183
      // If the function name is derived from a macro expansion, then the
2184
      // argument buffer will not follow the name. Need to speak with Chris.
2185
1.26k
      while (*startBuf && *startBuf != ')' && 
*startBuf != ','1.20k
)
2186
1.18k
        startBuf++; // scan forward (from the decl location) for argument types.
2187
74
      startBuf++;
2188
74
    }
2189
80
  }
2190
92
}
2191
2192
119
void RewriteObjC::RewriteTypeOfDecl(VarDecl *ND) {
2193
119
  QualType QT = ND->getType();
2194
119
  const Type* TypePtr = QT->getAs<Type>();
2195
119
  if (!isa<TypeOfExprType>(TypePtr))
2196
116
    return;
2197
9
  
while (3
isa<TypeOfExprType>(TypePtr)) {
2198
6
    const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
2199
6
    QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
2200
6
    TypePtr = QT->getAs<Type>();
2201
6
  }
2202
  // FIXME. This will not work for multiple declarators; as in:
2203
  // __typeof__(a) b,c,d;
2204
3
  std::string TypeAsString(QT.getAsString(Context->getPrintingPolicy()));
2205
3
  SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
2206
3
  const char *startBuf = SM->getCharacterData(DeclLoc);
2207
3
  if (ND->getInit()) {
2208
2
    std::string Name(ND->getNameAsString());
2209
2
    TypeAsString += " " + Name + " = ";
2210
2
    Expr *E = ND->getInit();
2211
2
    SourceLocation startLoc;
2212
2
    if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
2213
0
      startLoc = ECE->getLParenLoc();
2214
2
    else
2215
2
      startLoc = E->getBeginLoc();
2216
2
    startLoc = SM->getExpansionLoc(startLoc);
2217
2
    const char *endBuf = SM->getCharacterData(startLoc);
2218
2
    ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
2219
2
  }
2220
1
  else {
2221
1
    SourceLocation X = ND->getEndLoc();
2222
1
    X = SM->getExpansionLoc(X);
2223
1
    const char *endBuf = SM->getCharacterData(X);
2224
1
    ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
2225
1
  }
2226
3
}
2227
2228
// SynthSelGetUidFunctionDecl - SEL sel_registerName(const char *str);
2229
15
void RewriteObjC::SynthSelGetUidFunctionDecl() {
2230
15
  IdentifierInfo *SelGetUidIdent = &Context->Idents.get("sel_registerName");
2231
15
  SmallVector<QualType, 16> ArgTys;
2232
15
  ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2233
15
  QualType getFuncType =
2234
15
    getSimpleFunctionType(Context->getObjCSelType(), ArgTys);
2235
15
  SelGetUidFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2236
15
                                               SourceLocation(),
2237
15
                                               SourceLocation(),
2238
15
                                               SelGetUidIdent, getFuncType,
2239
15
                                               nullptr, SC_Extern);
2240
15
}
2241
2242
136
void RewriteObjC::RewriteFunctionDecl(FunctionDecl *FD) {
2243
  // declared in <objc/objc.h>
2244
136
  if (FD->getIdentifier() &&
2245
136
      FD->getName() == "sel_registerName") {
2246
21
    SelGetUidFunctionDecl = FD;
2247
21
    return;
2248
21
  }
2249
115
  RewriteObjCQualifiedInterfaceTypes(FD);
2250
115
}
2251
2252
13
void RewriteObjC::RewriteBlockPointerType(std::string& Str, QualType Type) {
2253
13
  std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
2254
13
  const char *argPtr = TypeString.c_str();
2255
13
  if (!strchr(argPtr, '^')) {
2256
6
    Str += TypeString;
2257
6
    return;
2258
6
  }
2259
105
  
while (7
*argPtr) {
2260
98
    Str += (*argPtr == '^' ? 
'*'7
:
*argPtr91
);
2261
98
    argPtr++;
2262
98
  }
2263
7
}
2264
2265
// FIXME. Consolidate this routine with RewriteBlockPointerType.
2266
void RewriteObjC::RewriteBlockPointerTypeVariable(std::string& Str,
2267
2
                                                  ValueDecl *VD) {
2268
2
  QualType Type = VD->getType();
2269
2
  std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
2270
2
  const char *argPtr = TypeString.c_str();
2271
2
  int paren = 0;
2272
29
  while (*argPtr) {
2273
27
    switch (*argPtr) {
2274
4
      case '(':
2275
4
        Str += *argPtr;
2276
4
        paren++;
2277
4
        break;
2278
4
      case ')':
2279
4
        Str += *argPtr;
2280
4
        paren--;
2281
4
        break;
2282
2
      case '^':
2283
2
        Str += '*';
2284
2
        if (paren == 1)
2285
2
          Str += VD->getNameAsString();
2286
2
        break;
2287
17
      default:
2288
17
        Str += *argPtr;
2289
17
        break;
2290
27
    }
2291
27
    argPtr++;
2292
27
  }
2293
2
}
2294
2295
30
void RewriteObjC::RewriteBlockLiteralFunctionDecl(FunctionDecl *FD) {
2296
30
  SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
2297
30
  const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2298
30
  const FunctionProtoType *proto = dyn_cast_or_null<FunctionProtoType>(funcType);
2299
30
  if (!proto)
2300
8
    return;
2301
22
  QualType Type = proto->getReturnType();
2302
22
  std::string FdStr = Type.getAsString(Context->getPrintingPolicy());
2303
22
  FdStr += " ";
2304
22
  FdStr += FD->getName();
2305
22
  FdStr +=  "(";
2306
22
  unsigned numArgs = proto->getNumParams();
2307
30
  for (unsigned i = 0; i < numArgs; 
i++8
) {
2308
8
    QualType ArgType = proto->getParamType(i);
2309
8
    RewriteBlockPointerType(FdStr, ArgType);
2310
8
    if (i+1 < numArgs)
2311
2
      FdStr += ", ";
2312
8
  }
2313
22
  FdStr +=  ");\n";
2314
22
  InsertText(FunLocStart, FdStr);
2315
22
  CurFunctionDeclToDeclareForBlock = nullptr;
2316
22
}
2317
2318
// SynthSuperConstructorFunctionDecl - id objc_super(id obj, id super);
2319
2
void RewriteObjC::SynthSuperConstructorFunctionDecl() {
2320
2
  if (SuperConstructorFunctionDecl)
2321
1
    return;
2322
1
  IdentifierInfo *msgSendIdent = &Context->Idents.get("__rw_objc_super");
2323
1
  SmallVector<QualType, 16> ArgTys;
2324
1
  QualType argT = Context->getObjCIdType();
2325
1
  assert(!argT.isNull() && "Can't find 'id' type");
2326
0
  ArgTys.push_back(argT);
2327
1
  ArgTys.push_back(argT);
2328
1
  QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2329
1
                                               ArgTys);
2330
1
  SuperConstructorFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2331
1
                                                     SourceLocation(),
2332
1
                                                     SourceLocation(),
2333
1
                                                     msgSendIdent, msgSendType,
2334
1
                                                     nullptr, SC_Extern);
2335
1
}
2336
2337
// SynthMsgSendFunctionDecl - id objc_msgSend(id self, SEL op, ...);
2338
36
void RewriteObjC::SynthMsgSendFunctionDecl() {
2339
36
  IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend");
2340
36
  SmallVector<QualType, 16> ArgTys;
2341
36
  QualType argT = Context->getObjCIdType();
2342
36
  assert(!argT.isNull() && "Can't find 'id' type");
2343
0
  ArgTys.push_back(argT);
2344
36
  argT = Context->getObjCSelType();
2345
36
  assert(!argT.isNull() && "Can't find 'SEL' type");
2346
0
  ArgTys.push_back(argT);
2347
36
  QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2348
36
                                               ArgTys, /*variadic=*/true);
2349
36
  MsgSendFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2350
36
                                             SourceLocation(),
2351
36
                                             SourceLocation(),
2352
36
                                             msgSendIdent, msgSendType,
2353
36
                                             nullptr, SC_Extern);
2354
36
}
2355
2356
// SynthMsgSendSuperFunctionDecl - id objc_msgSendSuper(struct objc_super *, SEL op, ...);
2357
36
void RewriteObjC::SynthMsgSendSuperFunctionDecl() {
2358
36
  IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSendSuper");
2359
36
  SmallVector<QualType, 16> ArgTys;
2360
36
  RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
2361
36
                                      SourceLocation(), SourceLocation(),
2362
36
                                      &Context->Idents.get("objc_super"));
2363
36
  QualType argT = Context->getPointerType(Context->getTagDeclType(RD));
2364
36
  assert(!argT.isNull() && "Can't build 'struct objc_super *' type");
2365
0
  ArgTys.push_back(argT);
2366
36
  argT = Context->getObjCSelType();
2367
36
  assert(!argT.isNull() && "Can't find 'SEL' type");
2368
0
  ArgTys.push_back(argT);
2369
36
  QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2370
36
                                               ArgTys, /*variadic=*/true);
2371
36
  MsgSendSuperFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2372
36
                                                  SourceLocation(),
2373
36
                                                  SourceLocation(),
2374
36
                                                  msgSendIdent, msgSendType,
2375
36
                                                  nullptr, SC_Extern);
2376
36
}
2377
2378
// SynthMsgSendStretFunctionDecl - id objc_msgSend_stret(id self, SEL op, ...);
2379
36
void RewriteObjC::SynthMsgSendStretFunctionDecl() {
2380
36
  IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_stret");
2381
36
  SmallVector<QualType, 16> ArgTys;
2382
36
  QualType argT = Context->getObjCIdType();
2383
36
  assert(!argT.isNull() && "Can't find 'id' type");
2384
0
  ArgTys.push_back(argT);
2385
36
  argT = Context->getObjCSelType();
2386
36
  assert(!argT.isNull() && "Can't find 'SEL' type");
2387
0
  ArgTys.push_back(argT);
2388
36
  QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2389
36
                                               ArgTys, /*variadic=*/true);
2390
36
  MsgSendStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2391
36
                                                  SourceLocation(),
2392
36
                                                  SourceLocation(),
2393
36
                                                  msgSendIdent, msgSendType,
2394
36
                                                  nullptr, SC_Extern);
2395
36
}
2396
2397
// SynthMsgSendSuperStretFunctionDecl -
2398
// id objc_msgSendSuper_stret(struct objc_super *, SEL op, ...);
2399
36
void RewriteObjC::SynthMsgSendSuperStretFunctionDecl() {
2400
36
  IdentifierInfo *msgSendIdent =
2401
36
    &Context->Idents.get("objc_msgSendSuper_stret");
2402
36
  SmallVector<QualType, 16> ArgTys;
2403
36
  RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
2404
36
                                      SourceLocation(), SourceLocation(),
2405
36
                                      &Context->Idents.get("objc_super"));
2406
36
  QualType argT = Context->getPointerType(Context->getTagDeclType(RD));
2407
36
  assert(!argT.isNull() && "Can't build 'struct objc_super *' type");
2408
0
  ArgTys.push_back(argT);
2409
36
  argT = Context->getObjCSelType();
2410
36
  assert(!argT.isNull() && "Can't find 'SEL' type");
2411
0
  ArgTys.push_back(argT);
2412
36
  QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2413
36
                                               ArgTys, /*variadic=*/true);
2414
36
  MsgSendSuperStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2415
36
                                                       SourceLocation(),
2416
36
                                                       SourceLocation(),
2417
36
                                                       msgSendIdent,
2418
36
                                                       msgSendType, nullptr,
2419
36
                                                       SC_Extern);
2420
36
}
2421
2422
// SynthMsgSendFpretFunctionDecl - double objc_msgSend_fpret(id self, SEL op, ...);
2423
36
void RewriteObjC::SynthMsgSendFpretFunctionDecl() {
2424
36
  IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_fpret");
2425
36
  SmallVector<QualType, 16> ArgTys;
2426
36
  QualType argT = Context->getObjCIdType();
2427
36
  assert(!argT.isNull() && "Can't find 'id' type");
2428
0
  ArgTys.push_back(argT);
2429
36
  argT = Context->getObjCSelType();
2430
36
  assert(!argT.isNull() && "Can't find 'SEL' type");
2431
0
  ArgTys.push_back(argT);
2432
36
  QualType msgSendType = getSimpleFunctionType(Context->DoubleTy,
2433
36
                                               ArgTys, /*variadic=*/true);
2434
36
  MsgSendFpretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2435
36
                                                  SourceLocation(),
2436
36
                                                  SourceLocation(),
2437
36
                                                  msgSendIdent, msgSendType,
2438
36
                                                  nullptr, SC_Extern);
2439
36
}
2440
2441
// SynthGetClassFunctionDecl - id objc_getClass(const char *name);
2442
36
void RewriteObjC::SynthGetClassFunctionDecl() {
2443
36
  IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getClass");
2444
36
  SmallVector<QualType, 16> ArgTys;
2445
36
  ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2446
36
  QualType getClassType = getSimpleFunctionType(Context->getObjCIdType(),
2447
36
                                                ArgTys);
2448
36
  GetClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2449
36
                                              SourceLocation(),
2450
36
                                              SourceLocation(),
2451
36
                                              getClassIdent, getClassType,
2452
36
                                              nullptr, SC_Extern);
2453
36
}
2454
2455
// SynthGetSuperClassFunctionDecl - Class class_getSuperclass(Class cls);
2456
36
void RewriteObjC::SynthGetSuperClassFunctionDecl() {
2457
36
  IdentifierInfo *getSuperClassIdent =
2458
36
    &Context->Idents.get("class_getSuperclass");
2459
36
  SmallVector<QualType, 16> ArgTys;
2460
36
  ArgTys.push_back(Context->getObjCClassType());
2461
36
  QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
2462
36
                                                ArgTys);
2463
36
  GetSuperClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2464
36
                                                   SourceLocation(),
2465
36
                                                   SourceLocation(),
2466
36
                                                   getSuperClassIdent,
2467
36
                                                   getClassType, nullptr,
2468
36
                                                   SC_Extern);
2469
36
}
2470
2471
// SynthGetMetaClassFunctionDecl - id objc_getMetaClass(const char *name);
2472
36
void RewriteObjC::SynthGetMetaClassFunctionDecl() {
2473
36
  IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getMetaClass");
2474
36
  SmallVector<QualType, 16> ArgTys;
2475
36
  ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2476
36
  QualType getClassType = getSimpleFunctionType(Context->getObjCIdType(),
2477
36
                                                ArgTys);
2478
36
  GetMetaClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2479
36
                                                  SourceLocation(),
2480
36
                                                  SourceLocation(),
2481
36
                                                  getClassIdent, getClassType,
2482
36
                                                  nullptr, SC_Extern);
2483
36
}
2484
2485
18
Stmt *RewriteObjC::RewriteObjCStringLiteral(ObjCStringLiteral *Exp) {
2486
18
  assert(Exp != nullptr && "Expected non-null ObjCStringLiteral");
2487
0
  QualType strType = getConstantStringStructType();
2488
2489
18
  std::string S = "__NSConstantStringImpl_";
2490
2491
18
  std::string tmpName = InFileName;
2492
18
  unsigned i;
2493
1.64k
  for (i=0; i < tmpName.length(); 
i++1.62k
) {
2494
1.62k
    char c = tmpName.at(i);
2495
    // replace any non-alphanumeric characters with '_'.
2496
1.62k
    if (!isAlphanumeric(c))
2497
232
      tmpName[i] = '_';
2498
1.62k
  }
2499
18
  S += tmpName;
2500
18
  S += "_";
2501
18
  S += utostr(NumObjCStringLiterals++);
2502
2503
18
  Preamble += "static __NSConstantStringImpl " + S;
2504
18
  Preamble += " __attribute__ ((section (\"__DATA, __cfstring\"))) = {__CFConstantStringClassReference,";
2505
18
  Preamble += "0x000007c8,"; // utf8_str
2506
  // The pretty printer for StringLiteral handles escape characters properly.
2507
18
  std::string prettyBufS;
2508
18
  llvm::raw_string_ostream prettyBuf(prettyBufS);
2509
18
  Exp->getString()->printPretty(prettyBuf, nullptr, PrintingPolicy(LangOpts));
2510
18
  Preamble += prettyBuf.str();
2511
18
  Preamble += ",";
2512
18
  Preamble += utostr(Exp->getString()->getByteLength()) + "};\n";
2513
2514
18
  VarDecl *NewVD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
2515
18
                                   SourceLocation(), &Context->Idents.get(S),
2516
18
                                   strType, nullptr, SC_Static);
2517
18
  DeclRefExpr *DRE = new (Context)
2518
18
      DeclRefExpr(*Context, NewVD, false, strType, VK_LValue, SourceLocation());
2519
18
  Expr *Unop = UnaryOperator::Create(
2520
18
      const_cast<ASTContext &>(*Context), DRE, UO_AddrOf,
2521
18
      Context->getPointerType(DRE->getType()), VK_PRValue, OK_Ordinary,
2522
18
      SourceLocation(), false, FPOptionsOverride());
2523
  // cast to NSConstantString *
2524
18
  CastExpr *cast = NoTypeInfoCStyleCastExpr(Context, Exp->getType(),
2525
18
                                            CK_CPointerToObjCPointerCast, Unop);
2526
18
  ReplaceStmt(Exp, cast);
2527
  // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2528
18
  return cast;
2529
18
}
2530
2531
// struct objc_super { struct objc_object *receiver; struct objc_class *super; };
2532
6
QualType RewriteObjC::getSuperStructType() {
2533
6
  if (!SuperStructDecl) {
2534
2
    SuperStructDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
2535
2
                                         SourceLocation(), SourceLocation(),
2536
2
                                         &Context->Idents.get("objc_super"));
2537
2
    QualType FieldTypes[2];
2538
2539
    // struct objc_object *receiver;
2540
2
    FieldTypes[0] = Context->getObjCIdType();
2541
    // struct objc_class *super;
2542
2
    FieldTypes[1] = Context->getObjCClassType();
2543
2544
    // Create fields
2545
6
    for (unsigned i = 0; i < 2; 
++i4
) {
2546
4
      SuperStructDecl->addDecl(FieldDecl::Create(*Context, SuperStructDecl,
2547
4
                                                 SourceLocation(),
2548
4
                                                 SourceLocation(), nullptr,
2549
4
                                                 FieldTypes[i], nullptr,
2550
4
                                                 /*BitWidth=*/nullptr,
2551
4
                                                 /*Mutable=*/false,
2552
4
                                                 ICIS_NoInit));
2553
4
    }
2554
2555
2
    SuperStructDecl->completeDefinition();
2556
2
  }
2557
6
  return Context->getTagDeclType(SuperStructDecl);
2558
6
}
2559
2560
18
QualType RewriteObjC::getConstantStringStructType() {
2561
18
  if (!ConstantStringDecl) {
2562
4
    ConstantStringDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
2563
4
                                            SourceLocation(), SourceLocation(),
2564
4
                         &Context->Idents.get("__NSConstantStringImpl"));
2565
4
    QualType FieldTypes[4];
2566
2567
    // struct objc_object *receiver;
2568
4
    FieldTypes[0] = Context->getObjCIdType();
2569
    // int flags;
2570
4
    FieldTypes[1] = Context->IntTy;
2571
    // char *str;
2572
4
    FieldTypes[2] = Context->getPointerType(Context->CharTy);
2573
    // long length;
2574
4
    FieldTypes[3] = Context->LongTy;
2575
2576
    // Create fields
2577
20
    for (unsigned i = 0; i < 4; 
++i16
) {
2578
16
      ConstantStringDecl->addDecl(FieldDecl::Create(*Context,
2579
16
                                                    ConstantStringDecl,
2580
16
                                                    SourceLocation(),
2581
16
                                                    SourceLocation(), nullptr,
2582
16
                                                    FieldTypes[i], nullptr,
2583
16
                                                    /*BitWidth=*/nullptr,
2584
16
                                                    /*Mutable=*/true,
2585
16
                                                    ICIS_NoInit));
2586
16
    }
2587
2588
4
    ConstantStringDecl->completeDefinition();
2589
4
  }
2590
18
  return Context->getTagDeclType(ConstantStringDecl);
2591
18
}
2592
2593
CallExpr *RewriteObjC::SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
2594
                                                QualType msgSendType,
2595
                                                QualType returnType,
2596
                                                SmallVectorImpl<QualType> &ArgTypes,
2597
                                                SmallVectorImpl<Expr*> &MsgExprs,
2598
1
                                                ObjCMethodDecl *Method) {
2599
  // Create a reference to the objc_msgSend_stret() declaration.
2600
1
  DeclRefExpr *STDRE =
2601
1
      new (Context) DeclRefExpr(*Context, MsgSendStretFlavor, false,
2602
1
                                msgSendType, VK_LValue, SourceLocation());
2603
  // Need to cast objc_msgSend_stret to "void *" (see above comment).
2604
1
  CastExpr *cast = NoTypeInfoCStyleCastExpr(Context,
2605
1
                                  Context->getPointerType(Context->VoidTy),
2606
1
                                  CK_BitCast, STDRE);
2607
  // Now do the "normal" pointer to function cast.
2608
1
  QualType castType = getSimpleFunctionType(returnType, ArgTypes,
2609
1
                                            Method ? Method->isVariadic()
2610
1
                                                   : 
false0
);
2611
1
  castType = Context->getPointerType(castType);
2612
1
  cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2613
1
                                            cast);
2614
2615
  // Don't forget the parens to enforce the proper binding.
2616
1
  ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), cast);
2617
2618
1
  const auto *FT = msgSendType->castAs<FunctionType>();
2619
1
  CallExpr *STCE =
2620
1
      CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(), VK_PRValue,
2621
1
                       SourceLocation(), FPOptionsOverride());
2622
1
  return STCE;
2623
1
}
2624
2625
Stmt *RewriteObjC::SynthMessageExpr(ObjCMessageExpr *Exp,
2626
                                    SourceLocation StartLoc,
2627
115
                                    SourceLocation EndLoc) {
2628
115
  if (!SelGetUidFunctionDecl)
2629
14
    SynthSelGetUidFunctionDecl();
2630
115
  if (!MsgSendFunctionDecl)
2631
36
    SynthMsgSendFunctionDecl();
2632
115
  if (!MsgSendSuperFunctionDecl)
2633
36
    SynthMsgSendSuperFunctionDecl();
2634
115
  if (!MsgSendStretFunctionDecl)
2635
36
    SynthMsgSendStretFunctionDecl();
2636
115
  if (!MsgSendSuperStretFunctionDecl)
2637
36
    SynthMsgSendSuperStretFunctionDecl();
2638
115
  if (!MsgSendFpretFunctionDecl)
2639
36
    SynthMsgSendFpretFunctionDecl();
2640
115
  if (!GetClassFunctionDecl)
2641
36
    SynthGetClassFunctionDecl();
2642
115
  if (!GetSuperClassFunctionDecl)
2643
36
    SynthGetSuperClassFunctionDecl();
2644
115
  if (!GetMetaClassFunctionDecl)
2645
36
    SynthGetMetaClassFunctionDecl();
2646
2647
  // default to objc_msgSend().
2648
115
  FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2649
  // May need to use objc_msgSend_stret() as well.
2650
115
  FunctionDecl *MsgSendStretFlavor = nullptr;
2651
115
  if (ObjCMethodDecl *mDecl = Exp->getMethodDecl()) {
2652
103
    QualType resultType = mDecl->getReturnType();
2653
103
    if (resultType->isRecordType())
2654
1
      MsgSendStretFlavor = MsgSendStretFunctionDecl;
2655
102
    else if (resultType->isRealFloatingType())
2656
0
      MsgSendFlavor = MsgSendFpretFunctionDecl;
2657
103
  }
2658
2659
  // Synthesize a call to objc_msgSend().
2660
115
  SmallVector<Expr*, 8> MsgExprs;
2661
115
  switch (Exp->getReceiverKind()) {
2662
1
  case ObjCMessageExpr::SuperClass: {
2663
1
    MsgSendFlavor = MsgSendSuperFunctionDecl;
2664
1
    if (MsgSendStretFlavor)
2665
0
      MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
2666
1
    assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
2667
2668
0
    ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
2669
2670
1
    SmallVector<Expr*, 4> InitExprs;
2671
2672
    // set the receiver to self, the first argument to all methods.
2673
1
    InitExprs.push_back(NoTypeInfoCStyleCastExpr(
2674
1
        Context, Context->getObjCIdType(), CK_BitCast,
2675
1
        new (Context) DeclRefExpr(*Context, CurMethodDef->getSelfDecl(), false,
2676
1
                                  Context->getObjCIdType(), VK_PRValue,
2677
1
                                  SourceLocation()))); // set the 'receiver'.
2678
2679
    // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
2680
1
    SmallVector<Expr*, 8> ClsExprs;
2681
1
    ClsExprs.push_back(getStringLiteral(ClassDecl->getIdentifier()->getName()));
2682
1
    CallExpr *Cls = SynthesizeCallToFunctionDecl(GetMetaClassFunctionDecl,
2683
1
                                                 ClsExprs, StartLoc, EndLoc);
2684
    // (Class)objc_getClass("CurrentClass")
2685
1
    CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
2686
1
                                             Context->getObjCClassType(),
2687
1
                                             CK_BitCast, Cls);
2688
1
    ClsExprs.clear();
2689
1
    ClsExprs.push_back(ArgExpr);
2690
1
    Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl, ClsExprs,
2691
1
                                       StartLoc, EndLoc);
2692
    // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
2693
    // To turn off a warning, type-cast to 'id'
2694
1
    InitExprs.push_back( // set 'super class', using class_getSuperclass().
2695
1
                        NoTypeInfoCStyleCastExpr(Context,
2696
1
                                                 Context->getObjCIdType(),
2697
1
                                                 CK_BitCast, Cls));
2698
    // struct objc_super
2699
1
    QualType superType = getSuperStructType();
2700
1
    Expr *SuperRep;
2701
2702
1
    if (LangOpts.MicrosoftExt) {
2703
1
      SynthSuperConstructorFunctionDecl();
2704
      // Simulate a constructor call...
2705
1
      DeclRefExpr *DRE = new (Context)
2706
1
          DeclRefExpr(*Context, SuperConstructorFunctionDecl, false, superType,
2707
1
                      VK_LValue, SourceLocation());
2708
1
      SuperRep =
2709
1
          CallExpr::Create(*Context, DRE, InitExprs, superType, VK_LValue,
2710
1
                           SourceLocation(), FPOptionsOverride());
2711
      // The code for super is a little tricky to prevent collision with
2712
      // the structure definition in the header. The rewriter has it's own
2713
      // internal definition (__rw_objc_super) that is uses. This is why
2714
      // we need the cast below. For example:
2715
      // (struct objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
2716
      //
2717
1
      SuperRep = UnaryOperator::Create(
2718
1
          const_cast<ASTContext &>(*Context), SuperRep, UO_AddrOf,
2719
1
          Context->getPointerType(SuperRep->getType()), VK_PRValue, OK_Ordinary,
2720
1
          SourceLocation(), false, FPOptionsOverride());
2721
1
      SuperRep = NoTypeInfoCStyleCastExpr(Context,
2722
1
                                          Context->getPointerType(superType),
2723
1
                                          CK_BitCast, SuperRep);
2724
1
    } else {
2725
      // (struct objc_super) { <exprs from above> }
2726
0
      InitListExpr *ILE =
2727
0
        new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
2728
0
                                   SourceLocation());
2729
0
      TypeSourceInfo *superTInfo
2730
0
        = Context->getTrivialTypeSourceInfo(superType);
2731
0
      SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
2732
0
                                                   superType, VK_LValue,
2733
0
                                                   ILE, false);
2734
      // struct objc_super *
2735
0
      SuperRep = UnaryOperator::Create(
2736
0
          const_cast<ASTContext &>(*Context), SuperRep, UO_AddrOf,
2737
0
          Context->getPointerType(SuperRep->getType()), VK_PRValue, OK_Ordinary,
2738
0
          SourceLocation(), false, FPOptionsOverride());
2739
0
    }
2740
1
    MsgExprs.push_back(SuperRep);
2741
1
    break;
2742
0
  }
2743
2744
17
  case ObjCMessageExpr::Class: {
2745
17
    SmallVector<Expr*, 8> ClsExprs;
2746
17
    auto *Class =
2747
17
        Exp->getClassReceiver()->castAs<ObjCObjectType>()->getInterface();
2748
17
    IdentifierInfo *clsName = Class->getIdentifier();
2749
17
    ClsExprs.push_back(getStringLiteral(clsName->getName()));
2750
17
    CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
2751
17
                                                 StartLoc, EndLoc);
2752
17
    MsgExprs.push_back(Cls);
2753
17
    break;
2754
0
  }
2755
2756
2
  case ObjCMessageExpr::SuperInstance:{
2757
2
    MsgSendFlavor = MsgSendSuperFunctionDecl;
2758
2
    if (MsgSendStretFlavor)
2759
0
      MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
2760
2
    assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
2761
0
    ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
2762
2
    SmallVector<Expr*, 4> InitExprs;
2763
2764
2
    InitExprs.push_back(NoTypeInfoCStyleCastExpr(
2765
2
        Context, Context->getObjCIdType(), CK_BitCast,
2766
2
        new (Context) DeclRefExpr(*Context, CurMethodDef->getSelfDecl(), false,
2767
2
                                  Context->getObjCIdType(), VK_PRValue,
2768
2
                                  SourceLocation()))); // set the 'receiver'.
2769
2770
    // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
2771
2
    SmallVector<Expr*, 8> ClsExprs;
2772
2
    ClsExprs.push_back(getStringLiteral(ClassDecl->getIdentifier()->getName()));
2773
2
    CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
2774
2
                                                 StartLoc, EndLoc);
2775
    // (Class)objc_getClass("CurrentClass")
2776
2
    CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
2777
2
                                                 Context->getObjCClassType(),
2778
2
                                                 CK_BitCast, Cls);
2779
2
    ClsExprs.clear();
2780
2
    ClsExprs.push_back(ArgExpr);
2781
2
    Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl, ClsExprs,
2782
2
                                       StartLoc, EndLoc);
2783
2784
    // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
2785
    // To turn off a warning, type-cast to 'id'
2786
2
    InitExprs.push_back(
2787
      // set 'super class', using class_getSuperclass().
2788
2
      NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
2789
2
                               CK_BitCast, Cls));
2790
    // struct objc_super
2791
2
    QualType superType = getSuperStructType();
2792
2
    Expr *SuperRep;
2793
2794
2
    if (LangOpts.MicrosoftExt) {
2795
1
      SynthSuperConstructorFunctionDecl();
2796
      // Simulate a constructor call...
2797
1
      DeclRefExpr *DRE = new (Context)
2798
1
          DeclRefExpr(*Context, SuperConstructorFunctionDecl, false, superType,
2799
1
                      VK_LValue, SourceLocation());
2800
1
      SuperRep =
2801
1
          CallExpr::Create(*Context, DRE, InitExprs, superType, VK_LValue,
2802
1
                           SourceLocation(), FPOptionsOverride());
2803
      // The code for super is a little tricky to prevent collision with
2804
      // the structure definition in the header. The rewriter has it's own
2805
      // internal definition (__rw_objc_super) that is uses. This is why
2806
      // we need the cast below. For example:
2807
      // (struct objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
2808
      //
2809
1
      SuperRep = UnaryOperator::Create(
2810
1
          const_cast<ASTContext &>(*Context), SuperRep, UO_AddrOf,
2811
1
          Context->getPointerType(SuperRep->getType()), VK_PRValue, OK_Ordinary,
2812
1
          SourceLocation(), false, FPOptionsOverride());
2813
1
      SuperRep = NoTypeInfoCStyleCastExpr(Context,
2814
1
                               Context->getPointerType(superType),
2815
1
                               CK_BitCast, SuperRep);
2816
1
    } else {
2817
      // (struct objc_super) { <exprs from above> }
2818
1
      InitListExpr *ILE =
2819
1
        new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
2820
1
                                   SourceLocation());
2821
1
      TypeSourceInfo *superTInfo
2822
1
        = Context->getTrivialTypeSourceInfo(superType);
2823
1
      SuperRep = new (Context) CompoundLiteralExpr(
2824
1
          SourceLocation(), superTInfo, superType, VK_PRValue, ILE, false);
2825
1
    }
2826
2
    MsgExprs.push_back(SuperRep);
2827
2
    break;
2828
0
  }
2829
2830
95
  case ObjCMessageExpr::Instance: {
2831
    // Remove all type-casts because it may contain objc-style types; e.g.
2832
    // Foo<Proto> *.
2833
95
    Expr *recExpr = Exp->getInstanceReceiver();
2834
99
    while (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(recExpr))
2835
4
      recExpr = CE->getSubExpr();
2836
95
    CastKind CK = recExpr->getType()->isObjCObjectPointerType()
2837
95
                    ? CK_BitCast : 
recExpr->getType()->isBlockPointerType()0
2838
0
                                     ? CK_BlockPointerToObjCPointerCast
2839
0
                                     : CK_CPointerToObjCPointerCast;
2840
2841
95
    recExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
2842
95
                                       CK, recExpr);
2843
95
    MsgExprs.push_back(recExpr);
2844
95
    break;
2845
0
  }
2846
115
  }
2847
2848
  // Create a call to sel_registerName("selName"), it will be the 2nd argument.
2849
115
  SmallVector<Expr*, 8> SelExprs;
2850
115
  SelExprs.push_back(getStringLiteral(Exp->getSelector().getAsString()));
2851
115
  CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2852
115
                                                  SelExprs, StartLoc, EndLoc);
2853
115
  MsgExprs.push_back(SelExp);
2854
2855
  // Now push any user supplied arguments.
2856
166
  for (unsigned i = 0; i < Exp->getNumArgs(); 
i++51
) {
2857
51
    Expr *userExpr = Exp->getArg(i);
2858
    // Make all implicit casts explicit...ICE comes in handy:-)
2859
51
    if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(userExpr)) {
2860
      // Reuse the ICE type, it is exactly what the doctor ordered.
2861
15
      QualType type = ICE->getType();
2862
15
      if (needToScanForQualifiers(type))
2863
1
        type = Context->getObjCIdType();
2864
      // Make sure we convert "type (^)(...)" to "type (*)(...)".
2865
15
      (void)convertBlockPointerToFunctionPointer(type);
2866
15
      const Expr *SubExpr = ICE->IgnoreParenImpCasts();
2867
15
      CastKind CK;
2868
15
      if (SubExpr->getType()->isIntegralType(*Context) &&
2869
15
          
type->isBooleanType()6
) {
2870
1
        CK = CK_IntegralToBoolean;
2871
14
      } else if (type->isObjCObjectPointerType()) {
2872
7
        if (SubExpr->getType()->isBlockPointerType()) {
2873
0
          CK = CK_BlockPointerToObjCPointerCast;
2874
7
        } else if (SubExpr->getType()->isPointerType()) {
2875
0
          CK = CK_CPointerToObjCPointerCast;
2876
7
        } else {
2877
7
          CK = CK_BitCast;
2878
7
        }
2879
7
      } else {
2880
7
        CK = CK_BitCast;
2881
7
      }
2882
2883
15
      userExpr = NoTypeInfoCStyleCastExpr(Context, type, CK, userExpr);
2884
15
    }
2885
    // Make id<P...> cast into an 'id' cast.
2886
36
    else if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(userExpr)) {
2887
20
      if (CE->getType()->isObjCQualifiedIdType()) {
2888
2
        while ((CE = dyn_cast<CStyleCastExpr>(userExpr)))
2889
1
          userExpr = CE->getSubExpr();
2890
1
        CastKind CK;
2891
1
        if (userExpr->getType()->isIntegralType(*Context)) {
2892
1
          CK = CK_IntegralToPointer;
2893
1
        } else 
if (0
userExpr->getType()->isBlockPointerType()0
) {
2894
0
          CK = CK_BlockPointerToObjCPointerCast;
2895
0
        } else if (userExpr->getType()->isPointerType()) {
2896
0
          CK = CK_CPointerToObjCPointerCast;
2897
0
        } else {
2898
0
          CK = CK_BitCast;
2899
0
        }
2900
1
        userExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
2901
1
                                            CK, userExpr);
2902
1
      }
2903
20
    }
2904
51
    MsgExprs.push_back(userExpr);
2905
    // We've transferred the ownership to MsgExprs. For now, we *don't* null
2906
    // out the argument in the original expression (since we aren't deleting
2907
    // the ObjCMessageExpr). See RewritePropertyOrImplicitSetter() usage for more info.
2908
    //Exp->setArg(i, 0);
2909
51
  }
2910
  // Generate the funky cast.
2911
115
  CastExpr *cast;
2912
115
  SmallVector<QualType, 8> ArgTypes;
2913
115
  QualType returnType;
2914
2915
  // Push 'id' and 'SEL', the 2 implicit arguments.
2916
115
  if (MsgSendFlavor == MsgSendSuperFunctionDecl)
2917
3
    ArgTypes.push_back(Context->getPointerType(getSuperStructType()));
2918
112
  else
2919
112
    ArgTypes.push_back(Context->getObjCIdType());
2920
115
  ArgTypes.push_back(Context->getObjCSelType());
2921
115
  if (ObjCMethodDecl *OMD = Exp->getMethodDecl()) {
2922
    // Push any user argument types.
2923
103
    for (const auto *PI : OMD->parameters()) {
2924
35
      QualType t = PI->getType()->isObjCQualifiedIdType()
2925
35
                     ? 
Context->getObjCIdType()1
2926
35
                     : 
PI->getType()34
;
2927
      // Make sure we convert "t (^)(...)" to "t (*)(...)".
2928
35
      (void)convertBlockPointerToFunctionPointer(t);
2929
35
      ArgTypes.push_back(t);
2930
35
    }
2931
103
    returnType = Exp->getType();
2932
103
    convertToUnqualifiedObjCType(returnType);
2933
103
    (void)convertBlockPointerToFunctionPointer(returnType);
2934
103
  } else {
2935
12
    returnType = Context->getObjCIdType();
2936
12
  }
2937
  // Get the type, we will need to reference it in a couple spots.
2938
115
  QualType msgSendType = MsgSendFlavor->getType();
2939
2940
  // Create a reference to the objc_msgSend() declaration.
2941
115
  DeclRefExpr *DRE = new (Context) DeclRefExpr(
2942
115
      *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2943
2944
  // Need to cast objc_msgSend to "void *" (to workaround a GCC bandaid).
2945
  // If we don't do this cast, we get the following bizarre warning/note:
2946
  // xx.m:13: warning: function called through a non-compatible type
2947
  // xx.m:13: note: if this code is reached, the program will abort
2948
115
  cast = NoTypeInfoCStyleCastExpr(Context,
2949
115
                                  Context->getPointerType(Context->VoidTy),
2950
115
                                  CK_BitCast, DRE);
2951
2952
  // Now do the "normal" pointer to function cast.
2953
  // If we don't have a method decl, force a variadic cast.
2954
115
  const ObjCMethodDecl *MD = Exp->getMethodDecl();
2955
115
  QualType castType =
2956
115
    getSimpleFunctionType(returnType, ArgTypes, MD ? 
MD->isVariadic()103
:
true12
);
2957
115
  castType = Context->getPointerType(castType);
2958
115
  cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2959
115
                                  cast);
2960
2961
  // Don't forget the parens to enforce the proper binding.
2962
115
  ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2963
2964
115
  const auto *FT = msgSendType->castAs<FunctionType>();
2965
115
  CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
2966
115
                                  VK_PRValue, EndLoc, FPOptionsOverride());
2967
115
  Stmt *ReplacingStmt = CE;
2968
115
  if (MsgSendStretFlavor) {
2969
    // We have the method which returns a struct/union. Must also generate
2970
    // call to objc_msgSend_stret and hang both varieties on a conditional
2971
    // expression which dictate which one to envoke depending on size of
2972
    // method's return type.
2973
2974
1
    CallExpr *STCE = SynthMsgSendStretCallExpr(MsgSendStretFlavor,
2975
1
                                               msgSendType, returnType,
2976
1
                                               ArgTypes, MsgExprs,
2977
1
                                               Exp->getMethodDecl());
2978
2979
    // Build sizeof(returnType)
2980
1
    UnaryExprOrTypeTraitExpr *sizeofExpr =
2981
1
       new (Context) UnaryExprOrTypeTraitExpr(UETT_SizeOf,
2982
1
                                 Context->getTrivialTypeSourceInfo(returnType),
2983
1
                                 Context->getSizeType(), SourceLocation(),
2984
1
                                 SourceLocation());
2985
    // (sizeof(returnType) <= 8 ? objc_msgSend(...) : objc_msgSend_stret(...))
2986
    // FIXME: Value of 8 is base on ppc32/x86 ABI for the most common cases.
2987
    // For X86 it is more complicated and some kind of target specific routine
2988
    // is needed to decide what to do.
2989
1
    unsigned IntSize =
2990
1
      static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
2991
1
    IntegerLiteral *limit = IntegerLiteral::Create(*Context,
2992
1
                                                   llvm::APInt(IntSize, 8),
2993
1
                                                   Context->IntTy,
2994
1
                                                   SourceLocation());
2995
1
    BinaryOperator *lessThanExpr = BinaryOperator::Create(
2996
1
        *Context, sizeofExpr, limit, BO_LE, Context->IntTy, VK_PRValue,
2997
1
        OK_Ordinary, SourceLocation(), FPOptionsOverride());
2998
    // (sizeof(returnType) <= 8 ? objc_msgSend(...) : objc_msgSend_stret(...))
2999
1
    ConditionalOperator *CondExpr = new (Context) ConditionalOperator(
3000
1
        lessThanExpr, SourceLocation(), CE, SourceLocation(), STCE, returnType,
3001
1
        VK_PRValue, OK_Ordinary);
3002
1
    ReplacingStmt = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
3003
1
                                            CondExpr);
3004
1
  }
3005
  // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3006
115
  return ReplacingStmt;
3007
115
}
3008
3009
79
Stmt *RewriteObjC::RewriteMessageExpr(ObjCMessageExpr *Exp) {
3010
79
  Stmt *ReplacingStmt =
3011
79
      SynthMessageExpr(Exp, Exp->getBeginLoc(), Exp->getEndLoc());
3012
3013
  // Now do the actual rewrite.
3014
79
  ReplaceStmt(Exp, ReplacingStmt);
3015
3016
  // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3017
79
  return ReplacingStmt;
3018
79
}
3019
3020
// typedef struct objc_object Protocol;
3021
0
QualType RewriteObjC::getProtocolType() {
3022
0
  if (!ProtocolTypeDecl) {
3023
0
    TypeSourceInfo *TInfo
3024
0
      = Context->getTrivialTypeSourceInfo(Context->getObjCIdType());
3025
0
    ProtocolTypeDecl = TypedefDecl::Create(*Context, TUDecl,
3026
0
                                           SourceLocation(), SourceLocation(),
3027
0
                                           &Context->Idents.get("Protocol"),
3028
0
                                           TInfo);
3029
0
  }
3030
0
  return Context->getTypeDeclType(ProtocolTypeDecl);
3031
0
}
3032
3033
/// RewriteObjCProtocolExpr - Rewrite a protocol expression into
3034
/// a synthesized/forward data reference (to the protocol's metadata).
3035
/// The forward references (and metadata) are generated in
3036
/// RewriteObjC::HandleTranslationUnit().
3037
0
Stmt *RewriteObjC::RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp) {
3038
0
  std::string Name = "_OBJC_PROTOCOL_" + Exp->getProtocol()->getNameAsString();
3039
0
  IdentifierInfo *ID = &Context->Idents.get(Name);
3040
0
  VarDecl *VD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
3041
0
                                SourceLocation(), ID, getProtocolType(),
3042
0
                                nullptr, SC_Extern);
3043
0
  DeclRefExpr *DRE = new (Context) DeclRefExpr(
3044
0
      *Context, VD, false, getProtocolType(), VK_LValue, SourceLocation());
3045
0
  Expr *DerefExpr = UnaryOperator::Create(
3046
0
      const_cast<ASTContext &>(*Context), DRE, UO_AddrOf,
3047
0
      Context->getPointerType(DRE->getType()), VK_PRValue, OK_Ordinary,
3048
0
      SourceLocation(), false, FPOptionsOverride());
3049
0
  CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, DerefExpr->getType(),
3050
0
                                                CK_BitCast,
3051
0
                                                DerefExpr);
3052
0
  ReplaceStmt(Exp, castExpr);
3053
0
  ProtocolExprDecls.insert(Exp->getProtocol()->getCanonicalDecl());
3054
  // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3055
0
  return castExpr;
3056
0
}
3057
3058
bool RewriteObjC::BufferContainsPPDirectives(const char *startBuf,
3059
39
                                             const char *endBuf) {
3060
878
  while (startBuf < endBuf) {
3061
839
    if (*startBuf == '#') {
3062
      // Skip whitespace.
3063
0
      for (++startBuf; startBuf[0] == ' ' || startBuf[0] == '\t'; ++startBuf)
3064
0
        ;
3065
0
      if (!strncmp(startBuf, "if", strlen("if")) ||
3066
0
          !strncmp(startBuf, "ifdef", strlen("ifdef")) ||
3067
0
          !strncmp(startBuf, "ifndef", strlen("ifndef")) ||
3068
0
          !strncmp(startBuf, "define", strlen("define")) ||
3069
0
          !strncmp(startBuf, "undef", strlen("undef")) ||
3070
0
          !strncmp(startBuf, "else", strlen("else")) ||
3071
0
          !strncmp(startBuf, "elif", strlen("elif")) ||
3072
0
          !strncmp(startBuf, "endif", strlen("endif")) ||
3073
0
          !strncmp(startBuf, "pragma", strlen("pragma")) ||
3074
0
          !strncmp(startBuf, "include", strlen("include")) ||
3075
0
          !strncmp(startBuf, "import", strlen("import")) ||
3076
0
          !strncmp(startBuf, "include_next", strlen("include_next")))
3077
0
        return true;
3078
0
    }
3079
839
    startBuf++;
3080
839
  }
3081
39
  return false;
3082
39
}
3083
3084
/// RewriteObjCInternalStruct - Rewrite one internal struct corresponding to
3085
/// an objective-c class with ivars.
3086
void RewriteObjC::RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
3087
120
                                               std::string &Result) {
3088
120
  assert(CDecl && "Class missing in SynthesizeObjCInternalStruct");
3089
0
  assert(CDecl->getName() != "" &&
3090
120
         "Name missing in SynthesizeObjCInternalStruct");
3091
  // Do not synthesize more than once.
3092
120
  if (ObjCSynthesizedStructs.count(CDecl))
3093
0
    return;
3094
120
  ObjCInterfaceDecl *RCDecl = CDecl->getSuperClass();
3095
120
  int NumIvars = CDecl->ivar_size();
3096
120
  SourceLocation LocStart = CDecl->getBeginLoc();
3097
120
  SourceLocation LocEnd = CDecl->getEndOfDefinitionLoc();
3098
3099
120
  const char *startBuf = SM->getCharacterData(LocStart);
3100
120
  const char *endBuf = SM->getCharacterData(LocEnd);
3101
3102
  // If no ivars and no root or if its root, directly or indirectly,
3103
  // have no ivars (thus not synthesized) then no need to synthesize this class.
3104
120
  if ((!CDecl->isThisDeclarationADefinition() || NumIvars == 0) &&
3105
120
      
(81
!RCDecl81
||
!ObjCSynthesizedStructs.count(RCDecl)10
)) {
3106
80
    endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
3107
80
    ReplaceText(LocStart, endBuf-startBuf, Result);
3108
80
    return;
3109
80
  }
3110
3111
  // FIXME: This has potential of causing problem. If
3112
  // SynthesizeObjCInternalStruct is ever called recursively.
3113
40
  Result += "\nstruct ";
3114
40
  Result += CDecl->getNameAsString();
3115
40
  if (LangOpts.MicrosoftExt)
3116
30
    Result += "_IMPL";
3117
3118
40
  if (NumIvars > 0) {
3119
39
    const char *cursor = strchr(startBuf, '{');
3120
39
    assert((cursor && endBuf)
3121
39
           && "SynthesizeObjCInternalStruct - malformed @interface");
3122
    // If the buffer contains preprocessor directives, we do more fine-grained
3123
    // rewrites. This is intended to fix code that looks like (which occurs in
3124
    // NSURL.h, for example):
3125
    //
3126
    // #ifdef XYZ
3127
    // @interface Foo : NSObject
3128
    // #else
3129
    // @interface FooBar : NSObject
3130
    // #endif
3131
    // {
3132
    //    int i;
3133
    // }
3134
    // @end
3135
    //
3136
    // This clause is segregated to avoid breaking the common case.
3137
39
    if (BufferContainsPPDirectives(startBuf, cursor)) {
3138
0
      SourceLocation L = RCDecl ? CDecl->getSuperClassLoc() :
3139
0
                                  CDecl->getAtStartLoc();
3140
0
      const char *endHeader = SM->getCharacterData(L);
3141
0
      endHeader += Lexer::MeasureTokenLength(L, *SM, LangOpts);
3142
3143
0
      if (CDecl->protocol_begin() != CDecl->protocol_end()) {
3144
        // advance to the end of the referenced protocols.
3145
0
        while (endHeader < cursor && *endHeader != '>') endHeader++;
3146
0
        endHeader++;
3147
0
      }
3148
      // rewrite the original header
3149
0
      ReplaceText(LocStart, endHeader-startBuf, Result);
3150
39
    } else {
3151
      // rewrite the original header *without* disturbing the '{'
3152
39
      ReplaceText(LocStart, cursor-startBuf, Result);
3153
39
    }
3154
39
    if (RCDecl && 
ObjCSynthesizedStructs.count(RCDecl)6
) {
3155
1
      Result = "\n    struct ";
3156
1
      Result += RCDecl->getNameAsString();
3157
1
      Result += "_IMPL ";
3158
1
      Result += RCDecl->getNameAsString();
3159
1
      Result += "_IVARS;\n";
3160
3161
      // insert the super class structure definition.
3162
1
      SourceLocation OnePastCurly =
3163
1
        LocStart.getLocWithOffset(cursor-startBuf+1);
3164
1
      InsertText(OnePastCurly, Result);
3165
1
    }
3166
39
    cursor++; // past '{'
3167
3168
    // Now comment out any visibility specifiers.
3169
1.11k
    while (cursor < endBuf) {
3170
1.07k
      if (*cursor == '@') {
3171
12
        SourceLocation atLoc = LocStart.getLocWithOffset(cursor-startBuf);
3172
        // Skip whitespace.
3173
12
        for (++cursor; cursor[0] == ' ' || cursor[0] == '\t'; 
++cursor0
)
3174
0
          /*scan*/;
3175
3176
        // FIXME: presence of @public, etc. inside comment results in
3177
        // this transformation as well, which is still correct c-code.
3178
12
        if (!strncmp(cursor, "public", strlen("public")) ||
3179
12
            
!strncmp(cursor, "private", strlen("private"))4
||
3180
12
            
!strncmp(cursor, "package", strlen("package"))0
||
3181
12
            
!strncmp(cursor, "protected", strlen("protected"))0
)
3182
12
          InsertText(atLoc, "// ");
3183
12
      }
3184
      // FIXME: If there are cases where '<' is used in ivar declaration part
3185
      // of user code, then scan the ivar list and use needToScanForQualifiers
3186
      // for type checking.
3187
1.06k
      else if (*cursor == '<') {
3188
4
        SourceLocation atLoc = LocStart.getLocWithOffset(cursor-startBuf);
3189
4
        InsertText(atLoc, "/* ");
3190
4
        cursor = strchr(cursor, '>');
3191
4
        cursor++;
3192
4
        atLoc = LocStart.getLocWithOffset(cursor-startBuf);
3193
4
        InsertText(atLoc, " */");
3194
1.06k
      } else if (*cursor == '^') { // rewrite block specifier.
3195
1
        SourceLocation caretLoc = LocStart.getLocWithOffset(cursor-startBuf);
3196
1
        ReplaceText(caretLoc, 1, "*");
3197
1
      }
3198
1.07k
      cursor++;
3199
1.07k
    }
3200
    // Don't forget to add a ';'!!
3201
39
    InsertText(LocEnd.getLocWithOffset(1), ";");
3202
39
  } else { // we don't have any instance variables - insert super struct.
3203
1
    endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
3204
1
    Result += " {\n    struct ";
3205
1
    Result += RCDecl->getNameAsString();
3206
1
    Result += "_IMPL ";
3207
1
    Result += RCDecl->getNameAsString();
3208
1
    Result += "_IVARS;\n};\n";
3209
1
    ReplaceText(LocStart, endBuf-startBuf, Result);
3210
1
  }
3211
  // Mark this struct as having been generated.
3212
40
  if (!ObjCSynthesizedStructs.insert(CDecl).second)
3213
0
    llvm_unreachable("struct already synthesize- SynthesizeObjCInternalStruct");
3214
40
}
3215
3216
//===----------------------------------------------------------------------===//
3217
// Meta Data Emission
3218
//===----------------------------------------------------------------------===//
3219
3220
/// RewriteImplementations - This routine rewrites all method implementations
3221
/// and emits meta-data.
3222
3223
53
void RewriteObjC::RewriteImplementations() {
3224
53
  int ClsDefCount = ClassImplementation.size();
3225
53
  int CatDefCount = CategoryImplementation.size();
3226
3227
  // Rewrite implemented methods
3228
117
  for (int i = 0; i < ClsDefCount; 
i++64
)
3229
64
    RewriteImplementationDecl(ClassImplementation[i]);
3230
3231
59
  for (int i = 0; i < CatDefCount; 
i++6
)
3232
6
    RewriteImplementationDecl(CategoryImplementation[i]);
3233
53
}
3234
3235
void RewriteObjC::RewriteByRefString(std::string &ResultStr,
3236
                                     const std::string &Name,
3237
208
                                     ValueDecl *VD, bool def) {
3238
208
  assert(BlockByRefDeclNo.count(VD) &&
3239
208
         "RewriteByRefString: ByRef decl missing");
3240
208
  if (def)
3241
61
    ResultStr += "struct ";
3242
208
  ResultStr += "__Block_byref_" + Name +
3243
208
    "_" + utostr(BlockByRefDeclNo[VD]) ;
3244
208
}
3245
3246
825
static bool HasLocalVariableExternalStorage(ValueDecl *VD) {
3247
825
  if (VarDecl *Var = dyn_cast<VarDecl>(VD))
3248
430
    return (Var->isFunctionOrMethodVarDecl() && 
!Var->hasLocalStorage()233
);
3249
395
  return false;
3250
825
}
3251
3252
std::string RewriteObjC::SynthesizeBlockFunc(BlockExpr *CE, int i,
3253
                                                   StringRef funcName,
3254
68
                                                   std::string Tag) {
3255
68
  const FunctionType *AFT = CE->getFunctionType();
3256
68
  QualType RT = AFT->getReturnType();
3257
68
  std::string StructRef = "struct " + Tag;
3258
68
  std::string S = "static " + RT.getAsString(Context->getPrintingPolicy()) + " __" +
3259
68
                  funcName.str() + "_" + "block_func_" + utostr(i);
3260
3261
68
  BlockDecl *BD = CE->getBlockDecl();
3262
3263
68
  if (isa<FunctionNoProtoType>(AFT)) {
3264
    // No user-supplied arguments. Still need to pass in a pointer to the
3265
    // block (to reference imported block decl refs).
3266
0
    S += "(" + StructRef + " *__cself)";
3267
68
  } else if (BD->param_empty()) {
3268
58
    S += "(" + StructRef + " *__cself)";
3269
58
  } else {
3270
10
    const FunctionProtoType *FT = cast<FunctionProtoType>(AFT);
3271
10
    assert(FT && "SynthesizeBlockFunc: No function proto");
3272
0
    S += '(';
3273
    // first add the implicit argument.
3274
10
    S += StructRef + " *__cself, ";
3275
10
    std::string ParamStr;
3276
10
    for (BlockDecl::param_iterator AI = BD->param_begin(),
3277
23
         E = BD->param_end(); AI != E; 
++AI13
) {
3278
13
      if (AI != BD->param_begin()) 
S += ", "3
;
3279
13
      ParamStr = (*AI)->getNameAsString();
3280
13
      QualType QT = (*AI)->getType();
3281
13
      (void)convertBlockPointerToFunctionPointer(QT);
3282
13
      QT.getAsStringInternal(ParamStr, Context->getPrintingPolicy());
3283
13
      S += ParamStr;
3284
13
    }
3285
10
    if (FT->isVariadic()) {
3286
0
      if (!BD->param_empty()) S += ", ";
3287
0
      S += "...";
3288
0
    }
3289
10
    S += ')';
3290
10
  }
3291
0
  S += " {\n";
3292
3293
  // Create local declarations to avoid rewriting all closure decl ref exprs.
3294
  // First, emit a declaration for all "by ref" decls.
3295
68
  for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
3296
104
       E = BlockByRefDecls.end(); I != E; 
++I36
) {
3297
36
    S += "  ";
3298
36
    std::string Name = (*I)->getNameAsString();
3299
36
    std::string TypeString;
3300
36
    RewriteByRefString(TypeString, Name, (*I));
3301
36
    TypeString += " *";
3302
36
    Name = TypeString + Name;
3303
36
    S += Name + " = __cself->" + (*I)->getNameAsString() + "; // bound by ref\n";
3304
36
  }
3305
  // Next, emit a declaration for all "by copy" declarations.
3306
68
  for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
3307
110
       E = BlockByCopyDecls.end(); I != E; 
++I42
) {
3308
42
    S += "  ";
3309
    // Handle nested closure invocation. For example:
3310
    //
3311
    //   void (^myImportedClosure)(void);
3312
    //   myImportedClosure  = ^(void) { setGlobalInt(x + y); };
3313
    //
3314
    //   void (^anotherClosure)(void);
3315
    //   anotherClosure = ^(void) {
3316
    //     myImportedClosure(); // import and invoke the closure
3317
    //   };
3318
    //
3319
42
    if (isTopLevelBlockPointerType((*I)->getType())) {
3320
2
      RewriteBlockPointerTypeVariable(S, (*I));
3321
2
      S += " = (";
3322
2
      RewriteBlockPointerType(S, (*I)->getType());
3323
2
      S += ")";
3324
2
      S += "__cself->" + (*I)->getNameAsString() + "; // bound by copy\n";
3325
2
    }
3326
40
    else {
3327
40
      std::string Name = (*I)->getNameAsString();
3328
40
      QualType QT = (*I)->getType();
3329
40
      if (HasLocalVariableExternalStorage(*I))
3330
2
        QT = Context->getPointerType(QT);
3331
40
      QT.getAsStringInternal(Name, Context->getPrintingPolicy());
3332
40
      S += Name + " = __cself->" +
3333
40
                              (*I)->getNameAsString() + "; // bound by copy\n";
3334
40
    }
3335
42
  }
3336
68
  std::string RewrittenStr = RewrittenBlockExprs[CE];
3337
68
  const char *cstr = RewrittenStr.c_str();
3338
341
  while (*cstr++ != '{') 
;273
3339
68
  S += cstr;
3340
68
  S += "\n";
3341
68
  return S;
3342
68
}
3343
3344
std::string RewriteObjC::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
3345
                                                   StringRef funcName,
3346
41
                                                   std::string Tag) {
3347
41
  std::string StructRef = "struct " + Tag;
3348
41
  std::string S = "static void __";
3349
3350
41
  S += funcName;
3351
41
  S += "_block_copy_" + utostr(i);
3352
41
  S += "(" + StructRef;
3353
41
  S += "*dst, " + StructRef;
3354
41
  S += "*src) {";
3355
69
  for (ValueDecl *VD : ImportedBlockDecls) {
3356
69
    S += "_Block_object_assign((void*)&dst->";
3357
69
    S += VD->getNameAsString();
3358
69
    S += ", (void*)src->";
3359
69
    S += VD->getNameAsString();
3360
69
    if (BlockByRefDeclsPtrSet.count(VD))
3361
36
      S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
3362
33
    else if (VD->getType()->isBlockPointerType())
3363
3
      S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
3364
30
    else
3365
30
      S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
3366
69
  }
3367
41
  S += "}\n";
3368
3369
41
  S += "\nstatic void __";
3370
41
  S += funcName;
3371
41
  S += "_block_dispose_" + utostr(i);
3372
41
  S += "(" + StructRef;
3373
41
  S += "*src) {";
3374
69
  for (ValueDecl *VD : ImportedBlockDecls) {
3375
69
    S += "_Block_object_dispose((void*)src->";
3376
69
    S += VD->getNameAsString();
3377
69
    if (BlockByRefDeclsPtrSet.count(VD))
3378
36
      S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
3379
33
    else if (VD->getType()->isBlockPointerType())
3380
3
      S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
3381
30
    else
3382
30
      S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
3383
69
  }
3384
41
  S += "}\n";
3385
41
  return S;
3386
41
}
3387
3388
std::string RewriteObjC::SynthesizeBlockImpl(BlockExpr *CE, std::string Tag,
3389
68
                                             std::string Desc) {
3390
68
  std::string S = "\nstruct " + Tag;
3391
68
  std::string Constructor = "  " + Tag;
3392
3393
68
  S += " {\n  struct __block_impl impl;\n";
3394
68
  S += "  struct " + Desc;
3395
68
  S += "* Desc;\n";
3396
3397
68
  Constructor += "(void *fp, "; // Invoke function pointer.
3398
68
  Constructor += "struct " + Desc; // Descriptor pointer.
3399
68
  Constructor += " *desc";
3400
3401
68
  if (BlockDeclRefs.size()) {
3402
    // Output all "by copy" declarations.
3403
47
    for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
3404
89
         E = BlockByCopyDecls.end(); I != E; 
++I42
) {
3405
42
      S += "  ";
3406
42
      std::string FieldName = (*I)->getNameAsString();
3407
42
      std::string ArgName = "_" + FieldName;
3408
      // Handle nested closure invocation. For example:
3409
      //
3410
      //   void (^myImportedBlock)(void);
3411
      //   myImportedBlock  = ^(void) { setGlobalInt(x + y); };
3412
      //
3413
      //   void (^anotherBlock)(void);
3414
      //   anotherBlock = ^(void) {
3415
      //     myImportedBlock(); // import and invoke the closure
3416
      //   };
3417
      //
3418
42
      if (isTopLevelBlockPointerType((*I)->getType())) {
3419
2
        S += "struct __block_impl *";
3420
2
        Constructor += ", void *" + ArgName;
3421
40
      } else {
3422
40
        QualType QT = (*I)->getType();
3423
40
        if (HasLocalVariableExternalStorage(*I))
3424
2
          QT = Context->getPointerType(QT);
3425
40
        QT.getAsStringInternal(FieldName, Context->getPrintingPolicy());
3426
40
        QT.getAsStringInternal(ArgName, Context->getPrintingPolicy());
3427
40
        Constructor += ", " + ArgName;
3428
40
      }
3429
42
      S += FieldName + ";\n";
3430
42
    }
3431
    // Output all "by ref" declarations.
3432
47
    for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
3433
83
         E = BlockByRefDecls.end(); I != E; 
++I36
) {
3434
36
      S += "  ";
3435
36
      std::string FieldName = (*I)->getNameAsString();
3436
36
      std::string ArgName = "_" + FieldName;
3437
36
      {
3438
36
        std::string TypeString;
3439
36
        RewriteByRefString(TypeString, FieldName, (*I));
3440
36
        TypeString += " *";
3441
36
        FieldName = TypeString + FieldName;
3442
36
        ArgName = TypeString + ArgName;
3443
36
        Constructor += ", " + ArgName;
3444
36
      }
3445
36
      S += FieldName + "; // by ref\n";
3446
36
    }
3447
    // Finish writing the constructor.
3448
47
    Constructor += ", int flags=0)";
3449
    // Initialize all "by copy" arguments.
3450
47
    bool firsTime = true;
3451
47
    for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
3452
89
         E = BlockByCopyDecls.end(); I != E; 
++I42
) {
3453
42
      std::string Name = (*I)->getNameAsString();
3454
42
        if (firsTime) {
3455
29
          Constructor += " : ";
3456
29
          firsTime = false;
3457
29
        }
3458
13
        else
3459
13
          Constructor += ", ";
3460
42
        if (isTopLevelBlockPointerType((*I)->getType()))
3461
2
          Constructor += Name + "((struct __block_impl *)_" + Name + ")";
3462
40
        else
3463
40
          Constructor += Name + "(_" + Name + ")";
3464
42
    }
3465
    // Initialize all "by ref" arguments.
3466
47
    for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
3467
83
         E = BlockByRefDecls.end(); I != E; 
++I36
) {
3468
36
      std::string Name = (*I)->getNameAsString();
3469
36
      if (firsTime) {
3470
18
        Constructor += " : ";
3471
18
        firsTime = false;
3472
18
      }
3473
18
      else
3474
18
        Constructor += ", ";
3475
36
      Constructor += Name + "(_" + Name + "->__forwarding)";
3476
36
    }
3477
3478
47
    Constructor += " {\n";
3479
47
    if (GlobalVarDecl)
3480
0
      Constructor += "    impl.isa = &_NSConcreteGlobalBlock;\n";
3481
47
    else
3482
47
      Constructor += "    impl.isa = &_NSConcreteStackBlock;\n";
3483
47
    Constructor += "    impl.Flags = flags;\n    impl.FuncPtr = fp;\n";
3484
3485
47
    Constructor += "    Desc = desc;\n";
3486
47
  } else {
3487
    // Finish writing the constructor.
3488
21
    Constructor += ", int flags=0) {\n";
3489
21
    if (GlobalVarDecl)
3490
4
      Constructor += "    impl.isa = &_NSConcreteGlobalBlock;\n";
3491
17
    else
3492
17
      Constructor += "    impl.isa = &_NSConcreteStackBlock;\n";
3493
21
    Constructor += "    impl.Flags = flags;\n    impl.FuncPtr = fp;\n";
3494
21
    Constructor += "    Desc = desc;\n";
3495
21
  }
3496
68
  Constructor += "  ";
3497
68
  Constructor += "}\n";
3498
68
  S += Constructor;
3499
68
  S += "};\n";
3500
68
  return S;
3501
68
}
3502
3503
std::string RewriteObjC::SynthesizeBlockDescriptor(std::string DescTag,
3504
                                                   std::string ImplTag, int i,
3505
                                                   StringRef FunName,
3506
68
                                                   unsigned hasCopy) {
3507
68
  std::string S = "\nstatic struct " + DescTag;
3508
3509
68
  S += " {\n  unsigned long reserved;\n";
3510
68
  S += "  unsigned long Block_size;\n";
3511
68
  if (hasCopy) {
3512
41
    S += "  void (*copy)(struct ";
3513
41
    S += ImplTag; S += "*, struct ";
3514
41
    S += ImplTag; S += "*);\n";
3515
3516
41
    S += "  void (*dispose)(struct ";
3517
41
    S += ImplTag; S += "*);\n";
3518
41
  }
3519
68
  S += "} ";
3520
3521
68
  S += DescTag + "_DATA = { 0, sizeof(struct ";
3522
68
  S += ImplTag + ")";
3523
68
  if (hasCopy) {
3524
41
    S += ", __" + FunName.str() + "_block_copy_" + utostr(i);
3525
41
    S += ", __" + FunName.str() + "_block_dispose_" + utostr(i);
3526
41
  }
3527
68
  S += "};\n";
3528
68
  return S;
3529
68
}
3530
3531
void RewriteObjC::SynthesizeBlockLiterals(SourceLocation FunLocStart,
3532
150
                                          StringRef FunName) {
3533
  // Insert declaration for the function in which block literal is used.
3534
150
  if (CurFunctionDeclToDeclareForBlock && 
!Blocks.empty()54
)
3535
15
    RewriteBlockLiteralFunctionDecl(CurFunctionDeclToDeclareForBlock);
3536
150
  bool RewriteSC = (GlobalVarDecl &&
3537
150
                    
!Blocks.empty()9
&&
3538
150
                    
GlobalVarDecl->getStorageClass() == SC_Static4
&&
3539
150
                    
GlobalVarDecl->getType().getCVRQualifiers()3
);
3540
150
  if (RewriteSC) {
3541
3
    std::string SC(" void __");
3542
3
    SC += GlobalVarDecl->getNameAsString();
3543
3
    SC += "() {}";
3544
3
    InsertText(FunLocStart, SC);
3545
3
  }
3546
3547
  // Insert closures that were part of the function.
3548
218
  for (unsigned i = 0, count=0; i < Blocks.size(); 
i++68
) {
3549
68
    CollectBlockDeclRefInfo(Blocks[i]);
3550
    // Need to copy-in the inner copied-in variables not actually used in this
3551
    // block.
3552
89
    for (int j = 0; j < InnerDeclRefsCount[i]; 
j++21
) {
3553
21
      DeclRefExpr *Exp = InnerDeclRefs[count++];
3554
21
      ValueDecl *VD = Exp->getDecl();
3555
21
      BlockDeclRefs.push_back(Exp);
3556
21
      if (!VD->hasAttr<BlocksAttr>() && 
!BlockByCopyDeclsPtrSet.count(VD)12
) {
3557
12
        BlockByCopyDeclsPtrSet.insert(VD);
3558
12
        BlockByCopyDecls.push_back(VD);
3559
12
      }
3560
21
      if (VD->hasAttr<BlocksAttr>() && 
!BlockByRefDeclsPtrSet.count(VD)9
) {
3561
9
        BlockByRefDeclsPtrSet.insert(VD);
3562
9
        BlockByRefDecls.push_back(VD);
3563
9
      }
3564
      // imported objects in the inner blocks not used in the outer
3565
      // blocks must be copied/disposed in the outer block as well.
3566
21
      if (VD->hasAttr<BlocksAttr>() ||
3567
21
          
VD->getType()->isObjCObjectPointerType()12
||
3568
21
          
VD->getType()->isBlockPointerType()1
)
3569
20
        ImportedBlockDecls.insert(VD);
3570
21
    }
3571
3572
68
    std::string ImplTag = "__" + FunName.str() + "_block_impl_" + utostr(i);
3573
68
    std::string DescTag = "__" + FunName.str() + "_block_desc_" + utostr(i);
3574
3575
68
    std::string CI = SynthesizeBlockImpl(Blocks[i], ImplTag, DescTag);
3576
3577
68
    InsertText(FunLocStart, CI);
3578
3579
68
    std::string CF = SynthesizeBlockFunc(Blocks[i], i, FunName, ImplTag);
3580
3581
68
    InsertText(FunLocStart, CF);
3582
3583
68
    if (ImportedBlockDecls.size()) {
3584
41
      std::string HF = SynthesizeBlockHelperFuncs(Blocks[i], i, FunName, ImplTag);
3585
41
      InsertText(FunLocStart, HF);
3586
41
    }
3587
68
    std::string BD = SynthesizeBlockDescriptor(DescTag, ImplTag, i, FunName,
3588
68
                                               ImportedBlockDecls.size() > 0);
3589
68
    InsertText(FunLocStart, BD);
3590
3591
68
    BlockDeclRefs.clear();
3592
68
    BlockByRefDecls.clear();
3593
68
    BlockByRefDeclsPtrSet.clear();
3594
68
    BlockByCopyDecls.clear();
3595
68
    BlockByCopyDeclsPtrSet.clear();
3596
68
    ImportedBlockDecls.clear();
3597
68
  }
3598
150
  if (RewriteSC) {
3599
    // Must insert any 'const/volatile/static here. Since it has been
3600
    // removed as result of rewriting of block literals.
3601
3
    std::string SC;
3602
3
    if (GlobalVarDecl->getStorageClass() == SC_Static)
3603
3
      SC = "static ";
3604
3
    if (GlobalVarDecl->getType().isConstQualified())
3605
3
      SC += "const ";
3606
3
    if (GlobalVarDecl->getType().isVolatileQualified())
3607
0
      SC += "volatile ";
3608
3
    if (GlobalVarDecl->getType().isRestrictQualified())
3609
0
      SC += "restrict ";
3610
3
    InsertText(FunLocStart, SC);
3611
3
  }
3612
3613
150
  Blocks.clear();
3614
150
  InnerDeclRefsCount.clear();
3615
150
  InnerDeclRefs.clear();
3616
150
  RewrittenBlockExprs.clear();
3617
150
}
3618
3619
64
void RewriteObjC::InsertBlockLiteralsWithinFunction(FunctionDecl *FD) {
3620
64
  SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
3621
64
  StringRef FuncName = FD->getName();
3622
3623
64
  SynthesizeBlockLiterals(FunLocStart, FuncName);
3624
64
}
3625
3626
static void BuildUniqueMethodName(std::string &Name,
3627
99
                                  ObjCMethodDecl *MD) {
3628
99
  ObjCInterfaceDecl *IFace = MD->getClassInterface();
3629
99
  Name = std::string(IFace->getName());
3630
99
  Name += "__" + MD->getSelector().getAsString();
3631
  // Convert colons to underscores.
3632
99
  std::string::size_type loc = 0;
3633
142
  while ((loc = Name.find(':', loc)) != std::string::npos)
3634
43
    Name.replace(loc, 1, "_");
3635
99
}
3636
3637
77
void RewriteObjC::InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD) {
3638
  // fprintf(stderr,"In InsertBlockLiteralsWitinMethod\n");
3639
  // SourceLocation FunLocStart = MD->getBeginLoc();
3640
77
  SourceLocation FunLocStart = MD->getBeginLoc();
3641
77
  std::string FuncName;
3642
77
  BuildUniqueMethodName(FuncName, MD);
3643
77
  SynthesizeBlockLiterals(FunLocStart, FuncName);
3644
77
}
3645
3646
1.85k
void RewriteObjC::GetBlockDeclRefExprs(Stmt *S) {
3647
1.85k
  for (Stmt *SubStmt : S->children())
3648
1.71k
    if (SubStmt) {
3649
1.71k
      if (BlockExpr *CBE = dyn_cast<BlockExpr>(SubStmt))
3650
0
        GetBlockDeclRefExprs(CBE->getBody());
3651
1.71k
      else
3652
1.71k
        GetBlockDeclRefExprs(SubStmt);
3653
1.71k
    }
3654
  // Handle specific things.
3655
1.85k
  if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S))
3656
426
    if (DRE->refersToEnclosingVariableOrCapture() ||
3657
426
        
HasLocalVariableExternalStorage(DRE->getDecl())304
)
3658
      // FIXME: Handle enums.
3659
140
      BlockDeclRefs.push_back(DRE);
3660
1.85k
}
3661
3662
void RewriteObjC::GetInnerBlockDeclRefExprs(Stmt *S,
3663
                SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
3664
642
                llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts) {
3665
642
  for (Stmt *SubStmt : S->children())
3666
574
    if (SubStmt) {
3667
574
      if (BlockExpr *CBE = dyn_cast<BlockExpr>(SubStmt)) {
3668
15
        InnerContexts.insert(cast<DeclContext>(CBE->getBlockDecl()));
3669
15
        GetInnerBlockDeclRefExprs(CBE->getBody(),
3670
15
                                  InnerBlockDeclRefs,
3671
15
                                  InnerContexts);
3672
15
      }
3673
559
      else
3674
559
        GetInnerBlockDeclRefExprs(SubStmt, InnerBlockDeclRefs, InnerContexts);
3675
574
    }
3676
  // Handle specific things.
3677
642
  if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
3678
141
    if (DRE->refersToEnclosingVariableOrCapture() ||
3679
141
        
HasLocalVariableExternalStorage(DRE->getDecl())59
) {
3680
91
      if (!InnerContexts.count(DRE->getDecl()->getDeclContext()))
3681
90
        InnerBlockDeclRefs.push_back(DRE);
3682
91
      if (VarDecl *Var = cast<VarDecl>(DRE->getDecl()))
3683
91
        if (Var->isFunctionOrMethodVarDecl())
3684
72
          ImportedLocalExternalDecls.insert(Var);
3685
91
    }
3686
141
  }
3687
642
}
3688
3689
/// convertFunctionTypeOfBlocks - This routine converts a function type
3690
/// whose result type may be a block pointer or whose argument type(s)
3691
/// might be block pointers to an equivalent function type replacing
3692
/// all block pointers to function pointers.
3693
68
QualType RewriteObjC::convertFunctionTypeOfBlocks(const FunctionType *FT) {
3694
68
  const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
3695
  // FTP will be null for closures that don't take arguments.
3696
  // Generate a funky cast.
3697
68
  SmallVector<QualType, 8> ArgTypes;
3698
68
  QualType Res = FT->getReturnType();
3699
68
  bool HasBlockType = convertBlockPointerToFunctionPointer(Res);
3700
3701
68
  if (FTP) {
3702
68
    for (auto &I : FTP->param_types()) {
3703
13
      QualType t = I;
3704
      // Make sure we convert "t (^)(...)" to "t (*)(...)".
3705
13
      if (convertBlockPointerToFunctionPointer(t))
3706
1
        HasBlockType = true;
3707
13
      ArgTypes.push_back(t);
3708
13
    }
3709
68
  }
3710
68
  QualType FuncType;
3711
  // FIXME. Does this work if block takes no argument but has a return type
3712
  // which is of block type?
3713
68
  if (HasBlockType)
3714
1
    FuncType = getSimpleFunctionType(Res, ArgTypes);
3715
67
  else FuncType = QualType(FT, 0);
3716
68
  return FuncType;
3717
68
}
3718
3719
14
Stmt *RewriteObjC::SynthesizeBlockCall(CallExpr *Exp, const Expr *BlockExp) {
3720
  // Navigate to relevant type information.
3721
14
  const BlockPointerType *CPT = nullptr;
3722
3723
14
  if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(BlockExp)) {
3724
0
    CPT = DRE->getType()->getAs<BlockPointerType>();
3725
14
  } else if (const MemberExpr *MExpr = dyn_cast<MemberExpr>(BlockExp)) {
3726
0
    CPT = MExpr->getType()->getAs<BlockPointerType>();
3727
0
  }
3728
14
  else if (const ParenExpr *PRE = dyn_cast<ParenExpr>(BlockExp)) {
3729
0
    return SynthesizeBlockCall(Exp, PRE->getSubExpr());
3730
0
  }
3731
14
  else if (const ImplicitCastExpr *IEXPR = dyn_cast<ImplicitCastExpr>(BlockExp))
3732
14
    CPT = IEXPR->getType()->getAs<BlockPointerType>();
3733
0
  else if (const ConditionalOperator *CEXPR =
3734
0
            dyn_cast<ConditionalOperator>(BlockExp)) {
3735
0
    Expr *LHSExp = CEXPR->getLHS();
3736
0
    Stmt *LHSStmt = SynthesizeBlockCall(Exp, LHSExp);
3737
0
    Expr *RHSExp = CEXPR->getRHS();
3738
0
    Stmt *RHSStmt = SynthesizeBlockCall(Exp, RHSExp);
3739
0
    Expr *CONDExp = CEXPR->getCond();
3740
0
    ConditionalOperator *CondExpr = new (Context) ConditionalOperator(
3741
0
        CONDExp, SourceLocation(), cast<Expr>(LHSStmt), SourceLocation(),
3742
0
        cast<Expr>(RHSStmt), Exp->getType(), VK_PRValue, OK_Ordinary);
3743
0
    return CondExpr;
3744
0
  } else if (const ObjCIvarRefExpr *IRE = dyn_cast<ObjCIvarRefExpr>(BlockExp)) {
3745
0
    CPT = IRE->getType()->getAs<BlockPointerType>();
3746
0
  } else if (const PseudoObjectExpr *POE
3747
0
               = dyn_cast<PseudoObjectExpr>(BlockExp)) {
3748
0
    CPT = POE->getType()->castAs<BlockPointerType>();
3749
0
  } else {
3750
0
    assert(false && "RewriteBlockClass: Bad type");
3751
0
  }
3752
14
  assert(CPT && "RewriteBlockClass: Bad type");
3753
0
  const FunctionType *FT = CPT->getPointeeType()->getAs<FunctionType>();
3754
14
  assert(FT && "RewriteBlockClass: Bad type");
3755
0
  const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
3756
  // FTP will be null for closures that don't take arguments.
3757
3758
14
  RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
3759
14
                                      SourceLocation(), SourceLocation(),
3760
14
                                      &Context->Idents.get("__block_impl"));
3761
14
  QualType PtrBlock = Context->getPointerType(Context->getTagDeclType(RD));
3762
3763
  // Generate a funky cast.
3764
14
  SmallVector<QualType, 8> ArgTypes;
3765
3766
  // Push the block argument type.
3767
14
  ArgTypes.push_back(PtrBlock);
3768
14
  if (FTP) {
3769
14
    for (auto &I : FTP->param_types()) {
3770
6
      QualType t = I;
3771
      // Make sure we convert "t (^)(...)" to "t (*)(...)".
3772
6
      if (!convertBlockPointerToFunctionPointer(t))
3773
6
        convertToUnqualifiedObjCType(t);
3774
6
      ArgTypes.push_back(t);
3775
6
    }
3776
14
  }
3777
  // Now do the pointer to function cast.
3778
14
  QualType PtrToFuncCastType = getSimpleFunctionType(Exp->getType(), ArgTypes);
3779
3780
14
  PtrToFuncCastType = Context->getPointerType(PtrToFuncCastType);
3781
3782
14
  CastExpr *BlkCast = NoTypeInfoCStyleCastExpr(Context, PtrBlock,
3783
14
                                               CK_BitCast,
3784
14
                                               const_cast<Expr*>(BlockExp));
3785
  // Don't forget the parens to enforce the proper binding.
3786
14
  ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
3787
14
                                          BlkCast);
3788
  //PE->dump();
3789
3790
14
  FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
3791
14
                                    SourceLocation(),
3792
14
                                    &Context->Idents.get("FuncPtr"),
3793
14
                                    Context->VoidPtrTy, nullptr,
3794
14
                                    /*BitWidth=*/nullptr, /*Mutable=*/true,
3795
14
                                    ICIS_NoInit);
3796
14
  MemberExpr *ME = MemberExpr::CreateImplicit(
3797
14
      *Context, PE, true, FD, FD->getType(), VK_LValue, OK_Ordinary);
3798
3799
14
  CastExpr *FunkCast = NoTypeInfoCStyleCastExpr(Context, PtrToFuncCastType,
3800
14
                                                CK_BitCast, ME);
3801
14
  PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), FunkCast);
3802
3803
14
  SmallVector<Expr*, 8> BlkExprs;
3804
  // Add the implicit argument.
3805
14
  BlkExprs.push_back(BlkCast);
3806
  // Add the user arguments.
3807
14
  for (CallExpr::arg_iterator I = Exp->arg_begin(),
3808
20
       E = Exp->arg_end(); I != E; 
++I6
) {
3809
6
    BlkExprs.push_back(*I);
3810
6
  }
3811
14
  CallExpr *CE =
3812
14
      CallExpr::Create(*Context, PE, BlkExprs, Exp->getType(), VK_PRValue,
3813
14
                       SourceLocation(), FPOptionsOverride());
3814
14
  return CE;
3815
14
}
3816
3817
// We need to return the rewritten expression to handle cases where the
3818
// BlockDeclRefExpr is embedded in another expression being rewritten.
3819
// For example:
3820
//
3821
// int main() {
3822
//    __block Foo *f;
3823
//    __block int i;
3824
//
3825
//    void (^myblock)() = ^() {
3826
//        [f test]; // f is a BlockDeclRefExpr embedded in a message (which is being rewritten).
3827
//        i = 77;
3828
//    };
3829
//}
3830
35
Stmt *RewriteObjC::RewriteBlockDeclRefExpr(DeclRefExpr *DeclRefExp) {
3831
  // Rewrite the byref variable into BYREFVAR->__forwarding->BYREFVAR
3832
  // for each DeclRefExp where BYREFVAR is name of the variable.
3833
35
  ValueDecl *VD = DeclRefExp->getDecl();
3834
35
  bool isArrow = DeclRefExp->refersToEnclosingVariableOrCapture() ||
3835
35
                 
HasLocalVariableExternalStorage(DeclRefExp->getDecl())8
;
3836
3837
35
  FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
3838
35
                                    SourceLocation(),
3839
35
                                    &Context->Idents.get("__forwarding"),
3840
35
                                    Context->VoidPtrTy, nullptr,
3841
35
                                    /*BitWidth=*/nullptr, /*Mutable=*/true,
3842
35
                                    ICIS_NoInit);
3843
35
  MemberExpr *ME =
3844
35
      MemberExpr::CreateImplicit(*Context, DeclRefExp, isArrow, FD,
3845
35
                                 FD->getType(), VK_LValue, OK_Ordinary);
3846
3847
35
  StringRef Name = VD->getName();
3848
35
  FD = FieldDecl::Create(*Context, nullptr, SourceLocation(), SourceLocation(),
3849
35
                         &Context->Idents.get(Name),
3850
35
                         Context->VoidPtrTy, nullptr,
3851
35
                         /*BitWidth=*/nullptr, /*Mutable=*/true,
3852
35
                         ICIS_NoInit);
3853
35
  ME = MemberExpr::CreateImplicit(*Context, ME, true, FD, DeclRefExp->getType(),
3854
35
                                  VK_LValue, OK_Ordinary);
3855
3856
  // Need parens to enforce precedence.
3857
35
  ParenExpr *PE = new (Context) ParenExpr(DeclRefExp->getExprLoc(),
3858
35
                                          DeclRefExp->getExprLoc(),
3859
35
                                          ME);
3860
35
  ReplaceStmt(DeclRefExp, PE);
3861
35
  return PE;
3862
35
}
3863
3864
// Rewrites the imported local variable V with external storage
3865
// (static, extern, etc.) as *V
3866
//
3867
15
Stmt *RewriteObjC::RewriteLocalVariableExternalStorage(DeclRefExpr *DRE) {
3868
15
  ValueDecl *VD = DRE->getDecl();
3869
15
  if (VarDecl *Var = dyn_cast<VarDecl>(VD))
3870
15
    if (!ImportedLocalExternalDecls.count(Var))
3871
6
      return DRE;
3872
9
  Expr *Exp = UnaryOperator::Create(
3873
9
      const_cast<ASTContext &>(*Context), DRE, UO_Deref, DRE->getType(),
3874
9
      VK_LValue, OK_Ordinary, DRE->getLocation(), false, FPOptionsOverride());
3875
  // Need parens to enforce precedence.
3876
9
  ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
3877
9
                                          Exp);
3878
9
  ReplaceStmt(DRE, PE);
3879
9
  return PE;
3880
15
}
3881
3882
31
void RewriteObjC::RewriteCastExpr(CStyleCastExpr *CE) {
3883
31
  SourceLocation LocStart = CE->getLParenLoc();
3884
31
  SourceLocation LocEnd = CE->getRParenLoc();
3885
3886
  // Need to avoid trying to rewrite synthesized casts.
3887
31
  if (LocStart.isInvalid())
3888
0
    return;
3889
  // Need to avoid trying to rewrite casts contained in macros.
3890
31
  if (!Rewriter::isRewritable(LocStart) || !Rewriter::isRewritable(LocEnd))
3891
0
    return;
3892
3893
31
  const char *startBuf = SM->getCharacterData(LocStart);
3894
31
  const char *endBuf = SM->getCharacterData(LocEnd);
3895
31
  QualType QT = CE->getType();
3896
31
  const Type* TypePtr = QT->getAs<Type>();
3897
31
  if (isa<TypeOfExprType>(TypePtr)) {
3898
3
    const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
3899
3
    QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
3900
3
    std::string TypeAsString = "(";
3901
3
    RewriteBlockPointerType(TypeAsString, QT);
3902
3
    TypeAsString += ")";
3903
3
    ReplaceText(LocStart, endBuf-startBuf+1, TypeAsString);
3904
3
    return;
3905
3
  }
3906
  // advance the location to startArgList.
3907
28
  const char *argPtr = startBuf;
3908
3909
249
  while (*argPtr++ && (argPtr < endBuf)) {
3910
221
    switch (*argPtr) {
3911
0
    case '^':
3912
      // Replace the '^' with '*'.
3913
0
      LocStart = LocStart.getLocWithOffset(argPtr-startBuf);
3914
0
      ReplaceText(LocStart, 1, "*");
3915
0
      break;
3916
221
    }
3917
221
  }
3918
28
}
3919
3920
20
void RewriteObjC::RewriteBlockPointerFunctionArgs(FunctionDecl *FD) {
3921
20
  SourceLocation DeclLoc = FD->getLocation();
3922
20
  unsigned parenCount = 0;
3923
3924
  // We have 1 or more arguments that have closure pointers.
3925
20
  const char *startBuf = SM->getCharacterData(DeclLoc);
3926
20
  const char *startArgList = strchr(startBuf, '(');
3927
3928
20
  assert((*startArgList == '(') && "Rewriter fuzzy parser confused");
3929
3930
0
  parenCount++;
3931
  // advance the location to startArgList.
3932
20
  DeclLoc = DeclLoc.getLocWithOffset(startArgList-startBuf);
3933
20
  assert((DeclLoc.isValid()) && "Invalid DeclLoc");
3934
3935
0
  const char *argPtr = startArgList;
3936
3937
390
  while (*argPtr++ && parenCount) {
3938
370
    switch (*argPtr) {
3939
20
    case '^':
3940
      // Replace the '^' with '*'.
3941
20
      DeclLoc = DeclLoc.getLocWithOffset(argPtr-startArgList);
3942
20
      ReplaceText(DeclLoc, 1, "*");
3943
20
      break;
3944
40
    case '(':
3945
40
      parenCount++;
3946
40
      break;
3947
60
    case ')':
3948
60
      parenCount--;
3949
60
      break;
3950
370
    }
3951
370
  }
3952
20
}
3953
3954
46
bool RewriteObjC::PointerTypeTakesAnyBlockArguments(QualType QT) {
3955
46
  const FunctionProtoType *FTP;
3956
46
  const PointerType *PT = QT->getAs<PointerType>();
3957
46
  if (PT) {
3958
1
    FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
3959
45
  } else {
3960
45
    const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
3961
45
    assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
3962
0
    FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
3963
45
  }
3964
46
  if (FTP) {
3965
44
    for (const auto &I : FTP->param_types())
3966
30
      if (isTopLevelBlockPointerType(I))
3967
3
        return true;
3968
44
  }
3969
43
  return false;
3970
46
}
3971
3972
42
bool RewriteObjC::PointerTypeTakesAnyObjCQualifiedType(QualType QT) {
3973
42
  const FunctionProtoType *FTP;
3974
42
  const PointerType *PT = QT->getAs<PointerType>();
3975
42
  if (PT) {
3976
0
    FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
3977
42
  } else {
3978
42
    const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
3979
42
    assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
3980
0
    FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
3981
42
  }
3982
42
  if (FTP) {
3983
40
    for (const auto &I : FTP->param_types()) {
3984
16
      if (I->isObjCQualifiedIdType())
3985
5
        return true;
3986
11
      if (I->isObjCObjectPointerType() &&
3987
11
          
I->getPointeeType()->isObjCQualifiedInterfaceType()4
)
3988
1
        return true;
3989
11
    }
3990
3991
40
  }
3992
36
  return false;
3993
42
}
3994
3995
void RewriteObjC::GetExtentOfArgList(const char *Name, const char *&LParen,
3996
9
                                     const char *&RParen) {
3997
9
  const char *argPtr = strchr(Name, '(');
3998
9
  assert((*argPtr == '(') && "Rewriter fuzzy parser confused");
3999
4000
0
  LParen = argPtr; // output the start.
4001
9
  argPtr++; // skip past the left paren.
4002
9
  unsigned parenCount = 1;
4003
4004
884
  while (*argPtr && parenCount) {
4005
875
    switch (*argPtr) {
4006
10
    case '(': parenCount++; break;
4007
19
    case ')': parenCount--; break;
4008
846
    default: break;
4009
875
    }
4010
875
    if (parenCount) 
argPtr++866
;
4011
875
  }
4012
9
  assert((*argPtr == ')') && "Rewriter fuzzy parser confused");
4013
0
  RParen = argPtr; // output the end
4014
9
}
4015
4016
65
void RewriteObjC::RewriteBlockPointerDecl(NamedDecl *ND) {
4017
65
  if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
4018
20
    RewriteBlockPointerFunctionArgs(FD);
4019
20
    return;
4020
20
  }
4021
  // Handle Variables and Typedefs.
4022
45
  SourceLocation DeclLoc = ND->getLocation();
4023
45
  QualType DeclT;
4024
45
  if (VarDecl *VD = dyn_cast<VarDecl>(ND))
4025
25
    DeclT = VD->getType();
4026
20
  else if (TypedefNameDecl *TDD = dyn_cast<TypedefNameDecl>(ND))
4027
20
    DeclT = TDD->getUnderlyingType();
4028
0
  else if (FieldDecl *FD = dyn_cast<FieldDecl>(ND))
4029
0
    DeclT = FD->getType();
4030
0
  else
4031
0
    llvm_unreachable("RewriteBlockPointerDecl(): Decl type not yet handled");
4032
4033
45
  const char *startBuf = SM->getCharacterData(DeclLoc);
4034
45
  const char *endBuf = startBuf;
4035
  // scan backward (from the decl location) for the end of the previous decl.
4036
92
  while (*startBuf != '^' && 
*startBuf != ';'47
&&
startBuf != MainFileStart47
)
4037
47
    startBuf--;
4038
45
  SourceLocation Start = DeclLoc.getLocWithOffset(startBuf-endBuf);
4039
45
  std::string buf;
4040
45
  unsigned OrigLength=0;
4041
  // *startBuf != '^' if we are dealing with a pointer to function that
4042
  // may take block argument types (which will be handled below).
4043
45
  if (*startBuf == '^') {
4044
    // Replace the '^' with '*', computing a negative offset.
4045
45
    buf = '*';
4046
45
    startBuf++;
4047
45
    OrigLength++;
4048
45
  }
4049
440
  while (*startBuf != ')') {
4050
395
    buf += *startBuf;
4051
395
    startBuf++;
4052
395
    OrigLength++;
4053
395
  }
4054
45
  buf += ')';
4055
45
  OrigLength++;
4056
4057
45
  if (PointerTypeTakesAnyBlockArguments(DeclT) ||
4058
45
      
PointerTypeTakesAnyObjCQualifiedType(DeclT)42
) {
4059
    // Replace the '^' with '*' for arguments.
4060
    // Replace id<P> with id/*<>*/
4061
9
    DeclLoc = ND->getLocation();
4062
9
    startBuf = SM->getCharacterData(DeclLoc);
4063
9
    const char *argListBegin, *argListEnd;
4064
9
    GetExtentOfArgList(startBuf, argListBegin, argListEnd);
4065
453
    while (argListBegin < argListEnd) {
4066
444
      if (*argListBegin == '^')
4067
5
        buf += '*';
4068
439
      else if (*argListBegin ==  '<') {
4069
17
        buf += "/*";
4070
17
        buf += *argListBegin++;
4071
17
        OrigLength++;
4072
431
        while (*argListBegin != '>') {
4073
414
          buf += *argListBegin++;
4074
414
          OrigLength++;
4075
414
        }
4076
17
        buf += *argListBegin;
4077
17
        buf += "*/";
4078
17
      }
4079
422
      else
4080
422
        buf += *argListBegin;
4081
444
      argListBegin++;
4082
444
      OrigLength++;
4083
444
    }
4084
9
    buf += ')';
4085
9
    OrigLength++;
4086
9
  }
4087
45
  ReplaceText(Start, OrigLength, buf);
4088
45
}
4089
4090
/// SynthesizeByrefCopyDestroyHelper - This routine synthesizes:
4091
/// void __Block_byref_id_object_copy(struct Block_byref_id_object *dst,
4092
///                    struct Block_byref_id_object *src) {
4093
///  _Block_object_assign (&_dest->object, _src->object,
4094
///                        BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4095
///                        [|BLOCK_FIELD_IS_WEAK]) // object
4096
///  _Block_object_assign(&_dest->object, _src->object,
4097
///                       BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4098
///                       [|BLOCK_FIELD_IS_WEAK]) // block
4099
/// }
4100
/// And:
4101
/// void __Block_byref_id_object_dispose(struct Block_byref_id_object *_src) {
4102
///  _Block_object_dispose(_src->object,
4103
///                        BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4104
///                        [|BLOCK_FIELD_IS_WEAK]) // object
4105
///  _Block_object_dispose(_src->object,
4106
///                         BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4107
///                         [|BLOCK_FIELD_IS_WEAK]) // block
4108
/// }
4109
4110
std::string RewriteObjC::SynthesizeByrefCopyDestroyHelper(VarDecl *VD,
4111
8
                                                          int flag) {
4112
8
  std::string S;
4113
8
  if (CopyDestroyCache.count(flag))
4114
3
    return S;
4115
5
  CopyDestroyCache.insert(flag);
4116
5
  S = "static void __Block_byref_id_object_copy_";
4117
5
  S += utostr(flag);
4118
5
  S += "(void *dst, void *src) {\n";
4119
4120
  // offset into the object pointer is computed as:
4121
  // void * + void* + int + int + void* + void *
4122
5
  unsigned IntSize =
4123
5
  static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
4124
5
  unsigned VoidPtrSize =
4125
5
  static_cast<unsigned>(Context->getTypeSize(Context->VoidPtrTy));
4126
4127
5
  unsigned offset = (VoidPtrSize*4 + IntSize + IntSize)/Context->getCharWidth();
4128
5
  S += " _Block_object_assign((char*)dst + ";
4129
5
  S += utostr(offset);
4130
5
  S += ", *(void * *) ((char*)src + ";
4131
5
  S += utostr(offset);
4132
5
  S += "), ";
4133
5
  S += utostr(flag);
4134
5
  S += ");\n}\n";
4135
4136
5
  S += "static void __Block_byref_id_object_dispose_";
4137
5
  S += utostr(flag);
4138
5
  S += "(void *src) {\n";
4139
5
  S += " _Block_object_dispose(*(void * *) ((char*)src + ";
4140
5
  S += utostr(offset);
4141
5
  S += "), ";
4142
5
  S += utostr(flag);
4143
5
  S += ");\n}\n";
4144
5
  return S;
4145
8
}
4146
4147
/// RewriteByRefVar - For each __block typex ND variable this routine transforms
4148
/// the declaration into:
4149
/// struct __Block_byref_ND {
4150
/// void *__isa;                  // NULL for everything except __weak pointers
4151
/// struct __Block_byref_ND *__forwarding;
4152
/// int32_t __flags;
4153
/// int32_t __size;
4154
/// void *__Block_byref_id_object_copy; // If variable is __block ObjC object
4155
/// void *__Block_byref_id_object_dispose; // If variable is __block ObjC object
4156
/// typex ND;
4157
/// };
4158
///
4159
/// It then replaces declaration of ND variable with:
4160
/// struct __Block_byref_ND ND = {__isa=0B, __forwarding=&ND, __flags=some_flag,
4161
///                               __size=sizeof(struct __Block_byref_ND),
4162
///                               ND=initializer-if-any};
4163
///
4164
///
4165
25
void RewriteObjC::RewriteByRefVar(VarDecl *ND) {
4166
  // Insert declaration for the function in which block literal is
4167
  // used.
4168
25
  if (CurFunctionDeclToDeclareForBlock)
4169
15
    RewriteBlockLiteralFunctionDecl(CurFunctionDeclToDeclareForBlock);
4170
25
  int flag = 0;
4171
25
  int isa = 0;
4172
25
  SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
4173
25
  if (DeclLoc.isInvalid())
4174
    // If type location is missing, it is because of missing type (a warning).
4175
    // Use variable's location which is good for this case.
4176
0
    DeclLoc = ND->getLocation();
4177
25
  const char *startBuf = SM->getCharacterData(DeclLoc);
4178
25
  SourceLocation X = ND->getEndLoc();
4179
25
  X = SM->getExpansionLoc(X);
4180
25
  const char *endBuf = SM->getCharacterData(X);
4181
25
  std::string Name(ND->getNameAsString());
4182
25
  std::string ByrefType;
4183
25
  RewriteByRefString(ByrefType, Name, ND, true);
4184
25
  ByrefType += " {\n";
4185
25
  ByrefType += "  void *__isa;\n";
4186
25
  RewriteByRefString(ByrefType, Name, ND);
4187
25
  ByrefType += " *__forwarding;\n";
4188
25
  ByrefType += " int __flags;\n";
4189
25
  ByrefType += " int __size;\n";
4190
  // Add void *__Block_byref_id_object_copy;
4191
  // void *__Block_byref_id_object_dispose; if needed.
4192
25
  QualType Ty = ND->getType();
4193
25
  bool HasCopyAndDispose = Context->BlockRequiresCopying(Ty, ND);
4194
25
  if (HasCopyAndDispose) {
4195
8
    ByrefType += " void (*__Block_byref_id_object_copy)(void*, void*);\n";
4196
8
    ByrefType += " void (*__Block_byref_id_object_dispose)(void*);\n";
4197
8
  }
4198
4199
25
  QualType T = Ty;
4200
25
  (void)convertBlockPointerToFunctionPointer(T);
4201
25
  T.getAsStringInternal(Name, Context->getPrintingPolicy());
4202
4203
25
  ByrefType += " " + Name + ";\n";
4204
25
  ByrefType += "};\n";
4205
  // Insert this type in global scope. It is needed by helper function.
4206
25
  SourceLocation FunLocStart;
4207
25
  if (CurFunctionDef)
4208
17
     FunLocStart = CurFunctionDef->getTypeSpecStartLoc();
4209
8
  else {
4210
8
    assert(CurMethodDef && "RewriteByRefVar - CurMethodDef is null");
4211
0
    FunLocStart = CurMethodDef->getBeginLoc();
4212
8
  }
4213
0
  InsertText(FunLocStart, ByrefType);
4214
25
  if (Ty.isObjCGCWeak()) {
4215
2
    flag |= BLOCK_FIELD_IS_WEAK;
4216
2
    isa = 1;
4217
2
  }
4218
4219
25
  if (HasCopyAndDispose) {
4220
8
    flag = BLOCK_BYREF_CALLER;
4221
8
    QualType Ty = ND->getType();
4222
    // FIXME. Handle __weak variable (BLOCK_FIELD_IS_WEAK) as well.
4223
8
    if (Ty->isBlockPointerType())
4224
2
      flag |= BLOCK_FIELD_IS_BLOCK;
4225
6
    else
4226
6
      flag |= BLOCK_FIELD_IS_OBJECT;
4227
8
    std::string HF = SynthesizeByrefCopyDestroyHelper(ND, flag);
4228
8
    if (!HF.empty())
4229
5
      InsertText(FunLocStart, HF);
4230
8
  }
4231
4232
  // struct __Block_byref_ND ND =
4233
  // {0, &ND, some_flag, __size=sizeof(struct __Block_byref_ND),
4234
  //  initializer-if-any};
4235
25
  bool hasInit = (ND->getInit() != nullptr);
4236
25
  unsigned flags = 0;
4237
25
  if (HasCopyAndDispose)
4238
8
    flags |= BLOCK_HAS_COPY_DISPOSE;
4239
25
  Name = ND->getNameAsString();
4240
25
  ByrefType.clear();
4241
25
  RewriteByRefString(ByrefType, Name, ND);
4242
25
  std::string ForwardingCastType("(");
4243
25
  ForwardingCastType += ByrefType + " *)";
4244
25
  if (!hasInit) {
4245
5
    ByrefType += " " + Name + " = {(void*)";
4246
5
    ByrefType += utostr(isa);
4247
5
    ByrefType += "," +  ForwardingCastType + "&" + Name + ", ";
4248
5
    ByrefType += utostr(flags);
4249
5
    ByrefType += ", ";
4250
5
    ByrefType += "sizeof(";
4251
5
    RewriteByRefString(ByrefType, Name, ND);
4252
5
    ByrefType += ")";
4253
5
    if (HasCopyAndDispose) {
4254
2
      ByrefType += ", __Block_byref_id_object_copy_";
4255
2
      ByrefType += utostr(flag);
4256
2
      ByrefType += ", __Block_byref_id_object_dispose_";
4257
2
      ByrefType += utostr(flag);
4258
2
    }
4259
5
    ByrefType += "};\n";
4260
5
    unsigned nameSize = Name.size();
4261
    // for block or function pointer declaration. Name is already
4262
    // part of the declaration.
4263
5
    if (Ty->isBlockPointerType() || 
Ty->isFunctionPointerType()3
)
4264
2
      nameSize = 1;
4265
5
    ReplaceText(DeclLoc, endBuf-startBuf+nameSize, ByrefType);
4266
5
  }
4267
20
  else {
4268
20
    SourceLocation startLoc;
4269
20
    Expr *E = ND->getInit();
4270
20
    if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
4271
1
      startLoc = ECE->getLParenLoc();
4272
19
    else
4273
19
      startLoc = E->getBeginLoc();
4274
20
    startLoc = SM->getExpansionLoc(startLoc);
4275
20
    endBuf = SM->getCharacterData(startLoc);
4276
20
    ByrefType += " " + Name;
4277
20
    ByrefType += " = {(void*)";
4278
20
    ByrefType += utostr(isa);
4279
20
    ByrefType += "," +  ForwardingCastType + "&" + Name + ", ";
4280
20
    ByrefType += utostr(flags);
4281
20
    ByrefType += ", ";
4282
20
    ByrefType += "sizeof(";
4283
20
    RewriteByRefString(ByrefType, Name, ND);
4284
20
    ByrefType += "), ";
4285
20
    if (HasCopyAndDispose) {
4286
6
      ByrefType += "__Block_byref_id_object_copy_";
4287
6
      ByrefType += utostr(flag);
4288
6
      ByrefType += ", __Block_byref_id_object_dispose_";
4289
6
      ByrefType += utostr(flag);
4290
6
      ByrefType += ", ";
4291
6
    }
4292
20
    ReplaceText(DeclLoc, endBuf-startBuf, ByrefType);
4293
4294
    // Complete the newly synthesized compound expression by inserting a right
4295
    // curly brace before the end of the declaration.
4296
    // FIXME: This approach avoids rewriting the initializer expression. It
4297
    // also assumes there is only one declarator. For example, the following
4298
    // isn't currently supported by this routine (in general):
4299
    //
4300
    // double __block BYREFVAR = 1.34, BYREFVAR2 = 1.37;
4301
    //
4302
20
    const char *startInitializerBuf = SM->getCharacterData(startLoc);
4303
20
    const char *semiBuf = strchr(startInitializerBuf, ';');
4304
20
    assert((*semiBuf == ';') && "RewriteByRefVar: can't find ';'");
4305
0
    SourceLocation semiLoc =
4306
20
      startLoc.getLocWithOffset(semiBuf-startInitializerBuf);
4307
4308
20
    InsertText(semiLoc, "}");
4309
20
  }
4310
25
}
4311
4312
136
void RewriteObjC::CollectBlockDeclRefInfo(BlockExpr *Exp) {
4313
  // Add initializers for any closure decl refs.
4314
136
  GetBlockDeclRefExprs(Exp->getBody());
4315
136
  if (BlockDeclRefs.size()) {
4316
    // Unique all "by copy" declarations.
4317
220
    for (unsigned i = 0; i < BlockDeclRefs.size(); 
i++140
)
4318
140
      if (!BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
4319
84
        if (!BlockByCopyDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
4320
60
          BlockByCopyDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
4321
60
          BlockByCopyDecls.push_back(BlockDeclRefs[i]->getDecl());
4322
60
        }
4323
84
      }
4324
    // Unique all "by ref" declarations.
4325
220
    for (unsigned i = 0; i < BlockDeclRefs.size(); 
i++140
)
4326
140
      if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
4327
56
        if (!BlockByRefDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
4328
54
          BlockByRefDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
4329
54
          BlockByRefDecls.push_back(BlockDeclRefs[i]->getDecl());
4330
54
        }
4331
56
      }
4332
    // Find any imported blocks...they will need special attention.
4333
220
    for (unsigned i = 0; i < BlockDeclRefs.size(); 
i++140
)
4334
140
      if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
4335
140
          
BlockDeclRefs[i]->getType()->isObjCObjectPointerType()84
||
4336
140
          
BlockDeclRefs[i]->getType()->isBlockPointerType()38
)
4337
110
        ImportedBlockDecls.insert(BlockDeclRefs[i]->getDecl());
4338
80
  }
4339
136
}
4340
4341
214
FunctionDecl *RewriteObjC::SynthBlockInitFunctionDecl(StringRef name) {
4342
214
  IdentifierInfo *ID = &Context->Idents.get(name);
4343
214
  QualType FType = Context->getFunctionNoProtoType(Context->VoidPtrTy);
4344
214
  return FunctionDecl::Create(*Context, TUDecl, SourceLocation(),
4345
214
                              SourceLocation(), ID, FType, nullptr, SC_Extern,
4346
214
                              false, false);
4347
214
}
4348
4349
Stmt *RewriteObjC::SynthBlockInitExpr(BlockExpr *Exp,
4350
68
                     const SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs) {
4351
68
  const BlockDecl *block = Exp->getBlockDecl();
4352
68
  Blocks.push_back(Exp);
4353
4354
68
  CollectBlockDeclRefInfo(Exp);
4355
4356
  // Add inner imported variables now used in current block.
4357
68
 int countOfInnerDecls = 0;
4358
68
  if (!InnerBlockDeclRefs.empty()) {
4359
136
    for (unsigned i = 0; i < InnerBlockDeclRefs.size(); 
i++90
) {
4360
90
      DeclRefExpr *Exp = InnerBlockDeclRefs[i];
4361
90
      ValueDecl *VD = Exp->getDecl();
4362
90
      if (!VD->hasAttr<BlocksAttr>() && 
!BlockByCopyDeclsPtrSet.count(VD)54
) {
4363
      // We need to save the copied-in variables in nested
4364
      // blocks because it is needed at the end for some of the API generations.
4365
      // See SynthesizeBlockLiterals routine.
4366
12
        InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
4367
12
        BlockDeclRefs.push_back(Exp);
4368
12
        BlockByCopyDeclsPtrSet.insert(VD);
4369
12
        BlockByCopyDecls.push_back(VD);
4370
12
      }
4371
90
      if (VD->hasAttr<BlocksAttr>() && 
!BlockByRefDeclsPtrSet.count(VD)36
) {
4372
9
        InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
4373
9
        BlockDeclRefs.push_back(Exp);
4374
9
        BlockByRefDeclsPtrSet.insert(VD);
4375
9
        BlockByRefDecls.push_back(VD);
4376
9
      }
4377
90
    }
4378
    // Find any imported blocks...they will need special attention.
4379
136
    for (unsigned i = 0; i < InnerBlockDeclRefs.size(); 
i++90
)
4380
90
      if (InnerBlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
4381
90
          
InnerBlockDeclRefs[i]->getType()->isObjCObjectPointerType()54
||
4382
90
          
InnerBlockDeclRefs[i]->getType()->isBlockPointerType()19
)
4383
74
        ImportedBlockDecls.insert(InnerBlockDeclRefs[i]->getDecl());
4384
46
  }
4385
68
  InnerDeclRefsCount.push_back(countOfInnerDecls);
4386
4387
68
  std::string FuncName;
4388
4389
68
  if (CurFunctionDef)
4390
42
    FuncName = CurFunctionDef->getNameAsString();
4391
26
  else if (CurMethodDef)
4392
22
    BuildUniqueMethodName(FuncName, CurMethodDef);
4393
4
  else if (GlobalVarDecl)
4394
4
    FuncName = std::string(GlobalVarDecl->getNameAsString());
4395
4396
68
  std::string BlockNumber = utostr(Blocks.size()-1);
4397
4398
68
  std::string Tag = "__" + FuncName + "_block_impl_" + BlockNumber;
4399
68
  std::string Func = "__" + FuncName + "_block_func_" + BlockNumber;
4400
4401
  // Get a pointer to the function type so we can cast appropriately.
4402
68
  QualType BFT = convertFunctionTypeOfBlocks(Exp->getFunctionType());
4403
68
  QualType FType = Context->getPointerType(BFT);
4404
4405
68
  FunctionDecl *FD;
4406
68
  Expr *NewRep;
4407
4408
  // Simulate a constructor call...
4409
68
  FD = SynthBlockInitFunctionDecl(Tag);
4410
68
  DeclRefExpr *DRE = new (Context)
4411
68
      DeclRefExpr(*Context, FD, false, FType, VK_PRValue, SourceLocation());
4412
4413
68
  SmallVector<Expr*, 4> InitExprs;
4414
4415
  // Initialize the block function.
4416
68
  FD = SynthBlockInitFunctionDecl(Func);
4417
68
  DeclRefExpr *Arg = new (Context) DeclRefExpr(
4418
68
      *Context, FD, false, FD->getType(), VK_LValue, SourceLocation());
4419
68
  CastExpr *castExpr =
4420
68
      NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy, CK_BitCast, Arg);
4421
68
  InitExprs.push_back(castExpr);
4422
4423
  // Initialize the block descriptor.
4424
68
  std::string DescData = "__" + FuncName + "_block_desc_" + BlockNumber + "_DATA";
4425
4426
68
  VarDecl *NewVD = VarDecl::Create(
4427
68
      *Context, TUDecl, SourceLocation(), SourceLocation(),
4428
68
      &Context->Idents.get(DescData), Context->VoidPtrTy, nullptr, SC_Static);
4429
68
  UnaryOperator *DescRefExpr = UnaryOperator::Create(
4430
68
      const_cast<ASTContext &>(*Context),
4431
68
      new (Context) DeclRefExpr(*Context, NewVD, false, Context->VoidPtrTy,
4432
68
                                VK_LValue, SourceLocation()),
4433
68
      UO_AddrOf, Context->getPointerType(Context->VoidPtrTy), VK_PRValue,
4434
68
      OK_Ordinary, SourceLocation(), false, FPOptionsOverride());
4435
68
  InitExprs.push_back(DescRefExpr);
4436
4437
  // Add initializers for any closure decl refs.
4438
68
  if (BlockDeclRefs.size()) {
4439
47
    Expr *Exp;
4440
    // Output all "by copy" declarations.
4441
47
    for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4442
89
         E = BlockByCopyDecls.end(); I != E; 
++I42
) {
4443
42
      if (isObjCType((*I)->getType())) {
4444
        // FIXME: Conform to ABI ([[obj retain] autorelease]).
4445
7
        FD = SynthBlockInitFunctionDecl((*I)->getName());
4446
7
        Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
4447
7
                                        VK_LValue, SourceLocation());
4448
7
        if (HasLocalVariableExternalStorage(*I)) {
4449
1
          QualType QT = (*I)->getType();
4450
1
          QT = Context->getPointerType(QT);
4451
1
          Exp = UnaryOperator::Create(const_cast<ASTContext &>(*Context), Exp,
4452
1
                                      UO_AddrOf, QT, VK_PRValue, OK_Ordinary,
4453
1
                                      SourceLocation(), false,
4454
1
                                      FPOptionsOverride());
4455
1
        }
4456
35
      } else if (isTopLevelBlockPointerType((*I)->getType())) {
4457
2
        FD = SynthBlockInitFunctionDecl((*I)->getName());
4458
2
        Arg = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
4459
2
                                        VK_LValue, SourceLocation());
4460
2
        Exp = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy, CK_BitCast,
4461
2
                                       Arg);
4462
33
      } else {
4463
33
        FD = SynthBlockInitFunctionDecl((*I)->getName());
4464
33
        Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
4465
33
                                        VK_LValue, SourceLocation());
4466
33
        if (HasLocalVariableExternalStorage(*I)) {
4467
1
          QualType QT = (*I)->getType();
4468
1
          QT = Context->getPointerType(QT);
4469
1
          Exp = UnaryOperator::Create(const_cast<ASTContext &>(*Context), Exp,
4470
1
                                      UO_AddrOf, QT, VK_PRValue, OK_Ordinary,
4471
1
                                      SourceLocation(), false,
4472
1
                                      FPOptionsOverride());
4473
1
        }
4474
33
      }
4475
42
      InitExprs.push_back(Exp);
4476
42
    }
4477
    // Output all "by ref" declarations.
4478
47
    for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4479
83
         E = BlockByRefDecls.end(); I != E; 
++I36
) {
4480
36
      ValueDecl *ND = (*I);
4481
36
      std::string Name(ND->getNameAsString());
4482
36
      std::string RecName;
4483
36
      RewriteByRefString(RecName, Name, ND, true);
4484
36
      IdentifierInfo *II = &Context->Idents.get(RecName.c_str()
4485
36
                                                + sizeof("struct"));
4486
36
      RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
4487
36
                                          SourceLocation(), SourceLocation(),
4488
36
                                          II);
4489
36
      assert(RD && "SynthBlockInitExpr(): Can't find RecordDecl");
4490
0
      QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
4491
4492
36
      FD = SynthBlockInitFunctionDecl((*I)->getName());
4493
36
      Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
4494
36
                                      VK_LValue, SourceLocation());
4495
36
      bool isNestedCapturedVar = false;
4496
36
      if (block)
4497
77
        
for (const auto &CI : block->captures())36
{
4498
77
          const VarDecl *variable = CI.getVariable();
4499
77
          if (variable == ND && 
CI.isNested()35
) {
4500
9
            assert (CI.isByRef() &&
4501
9
                    "SynthBlockInitExpr - captured block variable is not byref");
4502
0
            isNestedCapturedVar = true;
4503
9
            break;
4504
9
          }
4505
77
        }
4506
      // captured nested byref variable has its address passed. Do not take
4507
      // its address again.
4508
36
      if (!isNestedCapturedVar)
4509
27
        Exp = UnaryOperator::Create(
4510
27
            const_cast<ASTContext &>(*Context), Exp, UO_AddrOf,
4511
27
            Context->getPointerType(Exp->getType()), VK_PRValue, OK_Ordinary,
4512
27
            SourceLocation(), false, FPOptionsOverride());
4513
36
      Exp = NoTypeInfoCStyleCastExpr(Context, castT, CK_BitCast, Exp);
4514
36
      InitExprs.push_back(Exp);
4515
36
    }
4516
47
  }
4517
68
  if (ImportedBlockDecls.size()) {
4518
    // generate BLOCK_HAS_COPY_DISPOSE(have helper funcs) | BLOCK_HAS_DESCRIPTOR
4519
41
    int flag = (BLOCK_HAS_COPY_DISPOSE | BLOCK_HAS_DESCRIPTOR);
4520
41
    unsigned IntSize =
4521
41
      static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
4522
41
    Expr *FlagExp = IntegerLiteral::Create(*Context, llvm::APInt(IntSize, flag),
4523
41
                                           Context->IntTy, SourceLocation());
4524
41
    InitExprs.push_back(FlagExp);
4525
41
  }
4526
68
  NewRep = CallExpr::Create(*Context, DRE, InitExprs, FType, VK_LValue,
4527
68
                            SourceLocation(), FPOptionsOverride());
4528
68
  NewRep = UnaryOperator::Create(
4529
68
      const_cast<ASTContext &>(*Context), NewRep, UO_AddrOf,
4530
68
      Context->getPointerType(NewRep->getType()), VK_PRValue, OK_Ordinary,
4531
68
      SourceLocation(), false, FPOptionsOverride());
4532
68
  NewRep = NoTypeInfoCStyleCastExpr(Context, FType, CK_BitCast,
4533
68
                                    NewRep);
4534
68
  BlockDeclRefs.clear();
4535
68
  BlockByRefDecls.clear();
4536
68
  BlockByRefDeclsPtrSet.clear();
4537
68
  BlockByCopyDecls.clear();
4538
68
  BlockByCopyDeclsPtrSet.clear();
4539
68
  ImportedBlockDecls.clear();
4540
68
  return NewRep;
4541
68
}
4542
4543
13
bool RewriteObjC::IsDeclStmtInForeachHeader(DeclStmt *DS) {
4544
13
  if (const ObjCForCollectionStmt * CS =
4545
13
      dyn_cast<ObjCForCollectionStmt>(Stmts.back()))
4546
11
        return CS->getElement() == DS;
4547
2
  return false;
4548
13
}
4549
4550
//===----------------------------------------------------------------------===//
4551
// Function Body / Expression rewriting
4552
//===----------------------------------------------------------------------===//
4553
4554
2.13k
Stmt *RewriteObjC::RewriteFunctionBodyOrGlobalInitializer(Stmt *S) {
4555
2.13k
  if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
4556
2.13k
      
isa<DoStmt>(S)2.12k
||
isa<ForStmt>(S)2.12k
)
4557
7
    Stmts.push_back(S);
4558
2.12k
  else if (isa<ObjCForCollectionStmt>(S)) {
4559
18
    Stmts.push_back(S);
4560
18
    ObjCBcLabelNo.push_back(++BcLabelCount);
4561
18
  }
4562
4563
  // Pseudo-object operations and ivar references need special
4564
  // treatment because we're going to recursively rewrite them.
4565
2.13k
  if (PseudoObjectExpr *PseudoOp = dyn_cast<PseudoObjectExpr>(S)) {
4566
36
    if (isa<BinaryOperator>(PseudoOp->getSyntacticForm())) {
4567
14
      return RewritePropertyOrImplicitSetter(PseudoOp);
4568
22
    } else {
4569
22
      return RewritePropertyOrImplicitGetter(PseudoOp);
4570
22
    }
4571
2.09k
  } else if (ObjCIvarRefExpr *IvarRefExpr = dyn_cast<ObjCIvarRefExpr>(S)) {
4572
43
    return RewriteObjCIvarRefExpr(IvarRefExpr);
4573
43
  }
4574
4575
2.05k
  SourceRange OrigStmtRange = S->getSourceRange();
4576
4577
  // Perform a bottom up rewrite of all children.
4578
2.05k
  for (Stmt *&childStmt : S->children())
4579
1.82k
    if (childStmt) {
4580
1.82k
      Stmt *newStmt = RewriteFunctionBodyOrGlobalInitializer(childStmt);
4581
1.82k
      if (newStmt) {
4582
1.78k
        childStmt = newStmt;
4583
1.78k
      }
4584
1.82k
    }
4585
4586
2.05k
  if (BlockExpr *BE = dyn_cast<BlockExpr>(S)) {
4587
68
    SmallVector<DeclRefExpr *, 8> InnerBlockDeclRefs;
4588
68
    llvm::SmallPtrSet<const DeclContext *, 8> InnerContexts;
4589
68
    InnerContexts.insert(BE->getBlockDecl());
4590
68
    ImportedLocalExternalDecls.clear();
4591
68
    GetInnerBlockDeclRefExprs(BE->getBody(),
4592
68
                              InnerBlockDeclRefs, InnerContexts);
4593
    // Rewrite the block body in place.
4594
68
    Stmt *SaveCurrentBody = CurrentBody;
4595
68
    CurrentBody = BE->getBody();
4596
68
    PropParentMap = nullptr;
4597
    // block literal on rhs of a property-dot-sytax assignment
4598
    // must be replaced by its synthesize ast so getRewrittenText
4599
    // works as expected. In this case, what actually ends up on RHS
4600
    // is the blockTranscribed which is the helper function for the
4601
    // block literal; as in: self.c = ^() {[ace ARR];};
4602
68
    bool saveDisableReplaceStmt = DisableReplaceStmt;
4603
68
    DisableReplaceStmt = false;
4604
68
    RewriteFunctionBodyOrGlobalInitializer(BE->getBody());
4605
68
    DisableReplaceStmt = saveDisableReplaceStmt;
4606
68
    CurrentBody = SaveCurrentBody;
4607
68
    PropParentMap = nullptr;
4608
68
    ImportedLocalExternalDecls.clear();
4609
    // Now we snarf the rewritten text and stash it away for later use.
4610
68
    std::string Str = Rewrite.getRewrittenText(BE->getSourceRange());
4611
68
    RewrittenBlockExprs[BE] = Str;
4612
4613
68
    Stmt *blockTranscribed = SynthBlockInitExpr(BE, InnerBlockDeclRefs);
4614
4615
    //blockTranscribed->dump();
4616
68
    ReplaceStmt(S, blockTranscribed);
4617
68
    return blockTranscribed;
4618
68
  }
4619
  // Handle specific things.
4620
1.98k
  if (ObjCEncodeExpr *AtEncode = dyn_cast<ObjCEncodeExpr>(S))
4621
3
    return RewriteAtEncode(AtEncode);
4622
4623
1.98k
  if (ObjCSelectorExpr *AtSelector = dyn_cast<ObjCSelectorExpr>(S))
4624
1
    return RewriteAtSelector(AtSelector);
4625
4626
1.98k
  if (ObjCStringLiteral *AtString = dyn_cast<ObjCStringLiteral>(S))
4627
18
    return RewriteObjCStringLiteral(AtString);
4628
4629
1.96k
  if (ObjCMessageExpr *MessExpr = dyn_cast<ObjCMessageExpr>(S)) {
4630
#if 0
4631
    // Before we rewrite it, put the original message expression in a comment.
4632
    SourceLocation startLoc = MessExpr->getBeginLoc();
4633
    SourceLocation endLoc = MessExpr->getEndLoc();
4634
4635
    const char *startBuf = SM->getCharacterData(startLoc);
4636
    const char *endBuf = SM->getCharacterData(endLoc);
4637
4638
    std::string messString;
4639
    messString += "// ";
4640
    messString.append(startBuf, endBuf-startBuf+1);
4641
    messString += "\n";
4642
4643
    // FIXME: Missing definition of
4644
    // InsertText(clang::SourceLocation, char const*, unsigned int).
4645
    // InsertText(startLoc, messString);
4646
    // Tried this, but it didn't work either...
4647
    // ReplaceText(startLoc, 0, messString.c_str(), messString.size());
4648
#endif
4649
79
    return RewriteMessageExpr(MessExpr);
4650
79
  }
4651
4652
1.88k
  if (ObjCAtTryStmt *StmtTry = dyn_cast<ObjCAtTryStmt>(S))
4653
8
    return RewriteObjCTryStmt(StmtTry);
4654
4655
1.87k
  if (ObjCAtSynchronizedStmt *StmtTry = dyn_cast<ObjCAtSynchronizedStmt>(S))
4656
3
    return RewriteObjCSynchronizedStmt(StmtTry);
4657
4658
1.87k
  if (ObjCAtThrowStmt *StmtThrow = dyn_cast<ObjCAtThrowStmt>(S))
4659
2
    return RewriteObjCThrowStmt(StmtThrow);
4660
4661
1.87k
  if (ObjCProtocolExpr *ProtocolExp = dyn_cast<ObjCProtocolExpr>(S))
4662
0
    return RewriteObjCProtocolExpr(ProtocolExp);
4663
4664
1.87k
  if (ObjCForCollectionStmt *StmtForCollection =
4665
1.87k
        dyn_cast<ObjCForCollectionStmt>(S))
4666
18
    return RewriteObjCForCollectionStmt(StmtForCollection,
4667
18
                                        OrigStmtRange.getEnd());
4668
1.85k
  if (BreakStmt *StmtBreakStmt =
4669
1.85k
      dyn_cast<BreakStmt>(S))
4670
6
    return RewriteBreakStmt(StmtBreakStmt);
4671
1.84k
  if (ContinueStmt *StmtContinueStmt =
4672
1.84k
      dyn_cast<ContinueStmt>(S))
4673
2
    return RewriteContinueStmt(StmtContinueStmt);
4674
4675
  // Need to check for protocol refs (id <P>, Foo <P> *) in variable decls
4676
  // and cast exprs.
4677
1.84k
  if (DeclStmt *DS = dyn_cast<DeclStmt>(S)) {
4678
    // FIXME: What we're doing here is modifying the type-specifier that
4679
    // precedes the first Decl.  In the future the DeclGroup should have
4680
    // a separate type-specifier that we can rewrite.
4681
    // NOTE: We need to avoid rewriting the DeclStmt if it is within
4682
    // the context of an ObjCForCollectionStmt. For example:
4683
    //   NSArray *someArray;
4684
    //   for (id <FooProtocol> index in someArray) ;
4685
    // This is because RewriteObjCForCollectionStmt() does textual rewriting
4686
    // and it depends on the original text locations/positions.
4687
141
    if (Stmts.empty() || 
!IsDeclStmtInForeachHeader(DS)13
)
4688
132
      RewriteObjCQualifiedInterfaceTypes(*DS->decl_begin());
4689
4690
    // Blocks rewrite rules.
4691
144
    for (auto *SD : DS->decls()) {
4692
144
      if (ValueDecl *ND = dyn_cast<ValueDecl>(SD)) {
4693
144
        if (isTopLevelBlockPointerType(ND->getType()))
4694
21
          RewriteBlockPointerDecl(ND);
4695
123
        else if (ND->getType()->isFunctionPointerType())
4696
1
          CheckFunctionPointerDecl(ND->getType(), ND);
4697
144
        if (VarDecl *VD = dyn_cast<VarDecl>(SD)) {
4698
144
          if (VD->hasAttr<BlocksAttr>()) {
4699
25
            static unsigned uniqueByrefDeclCount = 0;
4700
25
            assert(!BlockByRefDeclNo.count(ND) &&
4701
25
              "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl");
4702
0
            BlockByRefDeclNo[ND] = uniqueByrefDeclCount++;
4703
25
            RewriteByRefVar(VD);
4704
25
          }
4705
119
          else
4706
119
            RewriteTypeOfDecl(VD);
4707
144
        }
4708
144
      }
4709
144
      if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(SD)) {
4710
0
        if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
4711
0
          RewriteBlockPointerDecl(TD);
4712
0
        else if (TD->getUnderlyingType()->isFunctionPointerType())
4713
0
          CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
4714
0
      }
4715
144
    }
4716
141
  }
4717
4718
1.84k
  if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S))
4719
31
    RewriteObjCQualifiedInterfaceTypes(CE);
4720
4721
1.84k
  if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
4722
1.84k
      
isa<DoStmt>(S)1.84k
||
isa<ForStmt>(S)1.84k
) {
4723
7
    assert(!Stmts.empty() && "Statement stack is empty");
4724
0
    assert ((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) ||
4725
7
             isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back()))
4726
7
            && "Statement stack mismatch");
4727
0
    Stmts.pop_back();
4728
7
  }
4729
  // Handle blocks rewriting.
4730
1.84k
  if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
4731
369
    ValueDecl *VD = DRE->getDecl();
4732
369
    if (VD->hasAttr<BlocksAttr>())
4733
35
      return RewriteBlockDeclRefExpr(DRE);
4734
334
    if (HasLocalVariableExternalStorage(VD))
4735
15
      return RewriteLocalVariableExternalStorage(DRE);
4736
334
  }
4737
4738
1.79k
  if (CallExpr *CE = dyn_cast<CallExpr>(S)) {
4739
119
    if (CE->getCallee()->getType()->isBlockPointerType()) {
4740
14
      Stmt *BlockCall = SynthesizeBlockCall(CE, CE->getCallee());
4741
14
      ReplaceStmt(S, BlockCall);
4742
14
      return BlockCall;
4743
14
    }
4744
119
  }
4745
1.78k
  if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S)) {
4746
31
    RewriteCastExpr(CE);
4747
31
  }
4748
#if 0
4749
  if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
4750
    CastExpr *Replacement = new (Context) CastExpr(ICE->getType(),
4751
                                                   ICE->getSubExpr(),
4752
                                                   SourceLocation());
4753
    // Get the new text.
4754
    std::string SStr;
4755
    llvm::raw_string_ostream Buf(SStr);
4756
    Replacement->printPretty(Buf);
4757
    const std::string &Str = Buf.str();
4758
4759
    printf("CAST = %s\n", &Str[0]);
4760
    InsertText(ICE->getSubExpr()->getBeginLoc(), Str);
4761
    delete S;
4762
    return Replacement;
4763
  }
4764
#endif
4765
  // Return this stmt unmodified.
4766
1.78k
  return S;
4767
1.79k
}
4768
4769
11
void RewriteObjC::RewriteRecordBody(RecordDecl *RD) {
4770
18
  for (auto *FD : RD->fields()) {
4771
18
    if (isTopLevelBlockPointerType(FD->getType()))
4772
0
      RewriteBlockPointerDecl(FD);
4773
18
    if (FD->getType()->isObjCQualifiedIdType() ||
4774
18
        
FD->getType()->isObjCQualifiedInterfaceType()17
)
4775
1
      RewriteObjCQualifiedInterfaceTypes(FD);
4776
18
  }
4777
11
}
4778
4779
/// HandleDeclInMainFile - This is called for each top-level decl defined in the
4780
/// main file of the input.
4781
522
void RewriteObjC::HandleDeclInMainFile(Decl *D) {
4782
522
  switch (D->getKind()) {
4783
136
    case Decl::Function: {
4784
136
      FunctionDecl *FD = cast<FunctionDecl>(D);
4785
136
      if (FD->isOverloadedOperator())
4786
0
        return;
4787
4788
      // Since function prototypes don't have ParmDecl's, we check the function
4789
      // prototype. This enables us to rewrite function declarations and
4790
      // definitions using the same code.
4791
136
      RewriteBlocksInFunctionProtoType(FD->getType(), FD);
4792
4793
136
      if (!FD->isThisDeclarationADefinition())
4794
72
        break;
4795
4796
      // FIXME: If this should support Obj-C++, support CXXTryStmt
4797
64
      if (CompoundStmt *Body = dyn_cast_or_null<CompoundStmt>(FD->getBody())) {
4798
64
        CurFunctionDef = FD;
4799
64
        CurFunctionDeclToDeclareForBlock = FD;
4800
64
        CurrentBody = Body;
4801
64
        Body =
4802
64
        cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
4803
64
        FD->setBody(Body);
4804
64
        CurrentBody = nullptr;
4805
64
        if (PropParentMap) {
4806
0
          delete PropParentMap;
4807
0
          PropParentMap = nullptr;
4808
0
        }
4809
        // This synthesizes and inserts the block "impl" struct, invoke function,
4810
        // and any copy/dispose helper functions.
4811
64
        InsertBlockLiteralsWithinFunction(FD);
4812
64
        CurFunctionDef = nullptr;
4813
64
        CurFunctionDeclToDeclareForBlock = nullptr;
4814
64
      }
4815
64
      break;
4816
136
    }
4817
77
    case Decl::ObjCMethod: {
4818
77
      ObjCMethodDecl *MD = cast<ObjCMethodDecl>(D);
4819
77
      if (CompoundStmt *Body = MD->getCompoundBody()) {
4820
77
        CurMethodDef = MD;
4821
77
        CurrentBody = Body;
4822
77
        Body =
4823
77
          cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
4824
77
        MD->setBody(Body);
4825
77
        CurrentBody = nullptr;
4826
77
        if (PropParentMap) {
4827
0
          delete PropParentMap;
4828
0
          PropParentMap = nullptr;
4829
0
        }
4830
77
        InsertBlockLiteralsWithinMethod(MD);
4831
77
        CurMethodDef = nullptr;
4832
77
      }
4833
77
      break;
4834
136
    }
4835
64
    case Decl::ObjCImplementation: {
4836
64
      ObjCImplementationDecl *CI = cast<ObjCImplementationDecl>(D);
4837
64
      ClassImplementation.push_back(CI);
4838
64
      break;
4839
136
    }
4840
6
    case Decl::ObjCCategoryImpl: {
4841
6
      ObjCCategoryImplDecl *CI = cast<ObjCCategoryImplDecl>(D);
4842
6
      CategoryImplementation.push_back(CI);
4843
6
      break;
4844
136
    }
4845
17
    case Decl::Var: {
4846
17
      VarDecl *VD = cast<VarDecl>(D);
4847
17
      RewriteObjCQualifiedInterfaceTypes(VD);
4848
17
      if (isTopLevelBlockPointerType(VD->getType()))
4849
4
        RewriteBlockPointerDecl(VD);
4850
13
      else if (VD->getType()->isFunctionPointerType()) {
4851
0
        CheckFunctionPointerDecl(VD->getType(), VD);
4852
0
        if (VD->getInit()) {
4853
0
          if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
4854
0
            RewriteCastExpr(CE);
4855
0
          }
4856
0
        }
4857
13
      } else if (VD->getType()->isRecordType()) {
4858
0
        RecordDecl *RD = VD->getType()->castAs<RecordType>()->getDecl();
4859
0
        if (RD->isCompleteDefinition())
4860
0
          RewriteRecordBody(RD);
4861
0
      }
4862
17
      if (VD->getInit()) {
4863
9
        GlobalVarDecl = VD;
4864
9
        CurrentBody = VD->getInit();
4865
9
        RewriteFunctionBodyOrGlobalInitializer(VD->getInit());
4866
9
        CurrentBody = nullptr;
4867
9
        if (PropParentMap) {
4868
0
          delete PropParentMap;
4869
0
          PropParentMap = nullptr;
4870
0
        }
4871
9
        SynthesizeBlockLiterals(VD->getTypeSpecStartLoc(), VD->getName());
4872
9
        GlobalVarDecl = nullptr;
4873
4874
        // This is needed for blocks.
4875
9
        if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
4876
0
            RewriteCastExpr(CE);
4877
0
        }
4878
9
      }
4879
17
      break;
4880
136
    }
4881
0
    case Decl::TypeAlias:
4882
50
    case Decl::Typedef: {
4883
50
      if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(D)) {
4884
50
        if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
4885
20
          RewriteBlockPointerDecl(TD);
4886
30
        else if (TD->getUnderlyingType()->isFunctionPointerType())
4887
0
          CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
4888
50
      }
4889
50
      break;
4890
0
    }
4891
7
    case Decl::CXXRecord:
4892
14
    case Decl::Record: {
4893
14
      RecordDecl *RD = cast<RecordDecl>(D);
4894
14
      if (RD->isCompleteDefinition())
4895
11
        RewriteRecordBody(RD);
4896
14
      break;
4897
7
    }
4898
158
    default:
4899
158
      break;
4900
522
  }
4901
  // Nothing yet.
4902
522
}
4903
4904
86
void RewriteObjC::HandleTranslationUnit(ASTContext &C) {
4905
86
  if (Diags.hasErrorOccurred())
4906
0
    return;
4907
4908
86
  RewriteInclude();
4909
4910
  // Here's a great place to add any extra declarations that may be needed.
4911
  // Write out meta data for each @protocol(<expr>).
4912
86
  for (ObjCProtocolDecl *ProtDecl : ProtocolExprDecls)
4913
0
    RewriteObjCProtocolMetaData(ProtDecl, "", "", Preamble);
4914
4915
86
  InsertText(SM->getLocForStartOfFile(MainFileID), Preamble, false);
4916
86
  if (ClassImplementation.size() || 
CategoryImplementation.size()33
)
4917
53
    RewriteImplementations();
4918
4919
  // Get the buffer corresponding to MainFileID.  If we haven't changed it, then
4920
  // we are done.
4921
86
  if (const RewriteBuffer *RewriteBuf =
4922
86
      Rewrite.getRewriteBufferFor(MainFileID)) {
4923
    //printf("Changed:\n");
4924
86
    *OutFile << std::string(RewriteBuf->begin(), RewriteBuf->end());
4925
86
  } else {
4926
0
    llvm::errs() << "No changes\n";
4927
0
  }
4928
4929
86
  if (ClassImplementation.size() || 
CategoryImplementation.size()33
||
4930
86
      
ProtocolExprDecls.size()33
) {
4931
    // Rewrite Objective-c meta data*
4932
53
    std::string ResultStr;
4933
53
    RewriteMetaDataIntoBuffer(ResultStr);
4934
    // Emit metadata.
4935
53
    *OutFile << ResultStr;
4936
53
  }
4937
86
  OutFile->flush();
4938
86
}
4939
4940
86
void RewriteObjCFragileABI::Initialize(ASTContext &context) {
4941
86
  InitializeCommon(context);
4942
4943
  // declaring objc_selector outside the parameter list removes a silly
4944
  // scope related warning...
4945
86
  if (IsHeader)
4946
0
    Preamble = "#pragma once\n";
4947
86
  Preamble += "struct objc_selector; struct objc_class;\n";
4948
86
  Preamble += "struct __rw_objc_super { struct objc_object *object; ";
4949
86
  Preamble += "struct objc_object *superClass; ";
4950
86
  if (LangOpts.MicrosoftExt) {
4951
    // Add a constructor for creating temporary objects.
4952
51
    Preamble += "__rw_objc_super(struct objc_object *o, struct objc_object *s) "
4953
51
    ": ";
4954
51
    Preamble += "object(o), superClass(s) {} ";
4955
51
  }
4956
86
  Preamble += "};\n";
4957
86
  Preamble += "#ifndef _REWRITER_typedef_Protocol\n";
4958
86
  Preamble += "typedef struct objc_object Protocol;\n";
4959
86
  Preamble += "#define _REWRITER_typedef_Protocol\n";
4960
86
  Preamble += "#endif\n";
4961
86
  if (LangOpts.MicrosoftExt) {
4962
51
    Preamble += "#define __OBJC_RW_DLLIMPORT extern \"C\" __declspec(dllimport)\n";
4963
51
    Preamble += "#define __OBJC_RW_STATICIMPORT extern \"C\"\n";
4964
51
  } else
4965
35
    Preamble += "#define __OBJC_RW_DLLIMPORT extern\n";
4966
86
  Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_msgSend";
4967
86
  Preamble += "(struct objc_object *, struct objc_selector *, ...);\n";
4968
86
  Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_msgSendSuper";
4969
86
  Preamble += "(struct objc_super *, struct objc_selector *, ...);\n";
4970
86
  Preamble += "__OBJC_RW_DLLIMPORT struct objc_object* objc_msgSend_stret";
4971
86
  Preamble += "(struct objc_object *, struct objc_selector *, ...);\n";
4972
86
  Preamble += "__OBJC_RW_DLLIMPORT struct objc_object* objc_msgSendSuper_stret";
4973
86
  Preamble += "(struct objc_super *, struct objc_selector *, ...);\n";
4974
86
  Preamble += "__OBJC_RW_DLLIMPORT double objc_msgSend_fpret";
4975
86
  Preamble += "(struct objc_object *, struct objc_selector *, ...);\n";
4976
86
  Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_getClass";
4977
86
  Preamble += "(const char *);\n";
4978
86
  Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *class_getSuperclass";
4979
86
  Preamble += "(struct objc_class *);\n";
4980
86
  Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_getMetaClass";
4981
86
  Preamble += "(const char *);\n";
4982
86
  Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_throw(struct objc_object *);\n";
4983
86
  Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_try_enter(void *);\n";
4984
86
  Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_try_exit(void *);\n";
4985
86
  Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_exception_extract(void *);\n";
4986
86
  Preamble += "__OBJC_RW_DLLIMPORT int objc_exception_match";
4987
86
  Preamble += "(struct objc_class *, struct objc_object *);\n";
4988
  // @synchronized hooks.
4989
86
  Preamble += "__OBJC_RW_DLLIMPORT int objc_sync_enter(struct objc_object *);\n";
4990
86
  Preamble += "__OBJC_RW_DLLIMPORT int objc_sync_exit(struct objc_object *);\n";
4991
86
  Preamble += "__OBJC_RW_DLLIMPORT Protocol *objc_getProtocol(const char *);\n";
4992
86
  Preamble += "#ifndef __FASTENUMERATIONSTATE\n";
4993
86
  Preamble += "struct __objcFastEnumerationState {\n\t";
4994
86
  Preamble += "unsigned long state;\n\t";
4995
86
  Preamble += "void **itemsPtr;\n\t";
4996
86
  Preamble += "unsigned long *mutationsPtr;\n\t";
4997
86
  Preamble += "unsigned long extra[5];\n};\n";
4998
86
  Preamble += "__OBJC_RW_DLLIMPORT void objc_enumerationMutation(struct objc_object *);\n";
4999
86
  Preamble += "#define __FASTENUMERATIONSTATE\n";
5000
86
  Preamble += "#endif\n";
5001
86
  Preamble += "#ifndef __NSCONSTANTSTRINGIMPL\n";
5002
86
  Preamble += "struct __NSConstantStringImpl {\n";
5003
86
  Preamble += "  int *isa;\n";
5004
86
  Preamble += "  int flags;\n";
5005
86
  Preamble += "  char *str;\n";
5006
86
  Preamble += "  long length;\n";
5007
86
  Preamble += "};\n";
5008
86
  Preamble += "#ifdef CF_EXPORT_CONSTANT_STRING\n";
5009
86
  Preamble += "extern \"C\" __declspec(dllexport) int __CFConstantStringClassReference[];\n";
5010
86
  Preamble += "#else\n";
5011
86
  Preamble += "__OBJC_RW_DLLIMPORT int __CFConstantStringClassReference[];\n";
5012
86
  Preamble += "#endif\n";
5013
86
  Preamble += "#define __NSCONSTANTSTRINGIMPL\n";
5014
86
  Preamble += "#endif\n";
5015
  // Blocks preamble.
5016
86
  Preamble += "#ifndef BLOCK_IMPL\n";
5017
86
  Preamble += "#define BLOCK_IMPL\n";
5018
86
  Preamble += "struct __block_impl {\n";
5019
86
  Preamble += "  void *isa;\n";
5020
86
  Preamble += "  int Flags;\n";
5021
86
  Preamble += "  int Reserved;\n";
5022
86
  Preamble += "  void *FuncPtr;\n";
5023
86
  Preamble += "};\n";
5024
86
  Preamble += "// Runtime copy/destroy helper functions (from Block_private.h)\n";
5025
86
  Preamble += "#ifdef __OBJC_EXPORT_BLOCKS\n";
5026
86
  Preamble += "extern \"C\" __declspec(dllexport) "
5027
86
  "void _Block_object_assign(void *, const void *, const int);\n";
5028
86
  Preamble += "extern \"C\" __declspec(dllexport) void _Block_object_dispose(const void *, const int);\n";
5029
86
  Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteGlobalBlock[32];\n";
5030
86
  Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteStackBlock[32];\n";
5031
86
  Preamble += "#else\n";
5032
86
  Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_assign(void *, const void *, const int);\n";
5033
86
  Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_dispose(const void *, const int);\n";
5034
86
  Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteGlobalBlock[32];\n";
5035
86
  Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteStackBlock[32];\n";
5036
86
  Preamble += "#endif\n";
5037
86
  Preamble += "#endif\n";
5038
86
  if (LangOpts.MicrosoftExt) {
5039
51
    Preamble += "#undef __OBJC_RW_DLLIMPORT\n";
5040
51
    Preamble += "#undef __OBJC_RW_STATICIMPORT\n";
5041
51
    Preamble += "#ifndef KEEP_ATTRIBUTES\n";  // We use this for clang tests.
5042
51
    Preamble += "#define __attribute__(X)\n";
5043
51
    Preamble += "#endif\n";
5044
51
    Preamble += "#define __weak\n";
5045
51
  }
5046
35
  else {
5047
35
    Preamble += "#define __block\n";
5048
35
    Preamble += "#define __weak\n";
5049
35
  }
5050
  // NOTE! Windows uses LLP64 for 64bit mode. So, cast pointer to long long
5051
  // as this avoids warning in any 64bit/32bit compilation model.
5052
86
  Preamble += "\n#define __OFFSETOFIVAR__(TYPE, MEMBER) ((long long) &((TYPE *)0)->MEMBER)\n";
5053
86
}
5054
5055
/// RewriteIvarOffsetComputation - This routine synthesizes computation of
5056
/// ivar offset.
5057
void RewriteObjCFragileABI::RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
5058
57
                                                         std::string &Result) {
5059
57
  if (ivar->isBitField()) {
5060
    // FIXME: The hack below doesn't work for bitfields. For now, we simply
5061
    // place all bitfields at offset 0.
5062
0
    Result += "0";
5063
57
  } else {
5064
57
    Result += "__OFFSETOFIVAR__(struct ";
5065
57
    Result += ivar->getContainingInterface()->getNameAsString();
5066
57
    if (LangOpts.MicrosoftExt)
5067
42
      Result += "_IMPL";
5068
57
    Result += ", ";
5069
57
    Result += ivar->getNameAsString();
5070
57
    Result += ")";
5071
57
  }
5072
57
}
5073
5074
/// RewriteObjCProtocolMetaData - Rewrite protocols meta-data.
5075
void RewriteObjCFragileABI::RewriteObjCProtocolMetaData(
5076
                            ObjCProtocolDecl *PDecl, StringRef prefix,
5077
3
                            StringRef ClassName, std::string &Result) {
5078
3
  static bool objc_protocol_methods = false;
5079
5080
  // Output struct protocol_methods holder of method selector and type.
5081
3
  if (!objc_protocol_methods && PDecl->hasDefinition()) {
5082
    /* struct protocol_methods {
5083
     SEL _cmd;
5084
     char *method_types;
5085
     }
5086
     */
5087
3
    Result += "\nstruct _protocol_methods {\n";
5088
3
    Result += "\tstruct objc_selector *_cmd;\n";
5089
3
    Result += "\tchar *method_types;\n";
5090
3
    Result += "};\n";
5091
5092
3
    objc_protocol_methods = true;
5093
3
  }
5094
  // Do not synthesize the protocol more than once.
5095
3
  if (ObjCSynthesizedProtocols.count(PDecl->getCanonicalDecl()))
5096
0
    return;
5097
5098
3
  if (ObjCProtocolDecl *Def = PDecl->getDefinition())
5099
3
    PDecl = Def;
5100