Bug Summary

File:clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
Warning:line 2692, column 59
Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name RewriteModernObjC.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mthread-model posix -mframe-pointer=none -relaxed-aliasing -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-11/lib/clang/11.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/tools/clang/lib/Frontend/Rewrite -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/include -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-11/lib/clang/11.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/tools/clang/lib/Frontend/Rewrite -fdebug-prefix-map=/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2020-03-09-184146-41876-1 -x c++ /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
1//===-- RewriteModernObjC.cpp - Playground for the code rewriter ----------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// Hacks and fun related to the code rewriter.
10//
11//===----------------------------------------------------------------------===//
12
13#include "clang/Rewrite/Frontend/ASTConsumers.h"
14#include "clang/AST/AST.h"
15#include "clang/AST/ASTConsumer.h"
16#include "clang/AST/Attr.h"
17#include "clang/AST/ParentMap.h"
18#include "clang/Basic/CharInfo.h"
19#include "clang/Basic/Diagnostic.h"
20#include "clang/Basic/IdentifierTable.h"
21#include "clang/Basic/SourceManager.h"
22#include "clang/Basic/TargetInfo.h"
23#include "clang/Config/config.h"
24#include "clang/Lex/Lexer.h"
25#include "clang/Rewrite/Core/Rewriter.h"
26#include "llvm/ADT/DenseSet.h"
27#include "llvm/ADT/SmallPtrSet.h"
28#include "llvm/ADT/StringExtras.h"
29#include "llvm/Support/MemoryBuffer.h"
30#include "llvm/Support/raw_ostream.h"
31#include <memory>
32
33#if CLANG_ENABLE_OBJC_REWRITER1
34
35using namespace clang;
36using llvm::utostr;
37
38namespace {
39 class RewriteModernObjC : public ASTConsumer {
40 protected:
41
42 enum {
43 BLOCK_FIELD_IS_OBJECT = 3, /* id, NSObject, __attribute__((NSObject)),
44 block, ... */
45 BLOCK_FIELD_IS_BLOCK = 7, /* a block variable */
46 BLOCK_FIELD_IS_BYREF = 8, /* the on stack structure holding the
47 __block variable */
48 BLOCK_FIELD_IS_WEAK = 16, /* declared __weak, only used in byref copy
49 helpers */
50 BLOCK_BYREF_CALLER = 128, /* called from __block (byref) copy/dispose
51 support routines */
52 BLOCK_BYREF_CURRENT_MAX = 256
53 };
54
55 enum {
56 BLOCK_NEEDS_FREE = (1 << 24),
57 BLOCK_HAS_COPY_DISPOSE = (1 << 25),
58 BLOCK_HAS_CXX_OBJ = (1 << 26),
59 BLOCK_IS_GC = (1 << 27),
60 BLOCK_IS_GLOBAL = (1 << 28),
61 BLOCK_HAS_DESCRIPTOR = (1 << 29)
62 };
63
64 Rewriter Rewrite;
65 DiagnosticsEngine &Diags;
66 const LangOptions &LangOpts;
67 ASTContext *Context;
68 SourceManager *SM;
69 TranslationUnitDecl *TUDecl;
70 FileID MainFileID;
71 const char *MainFileStart, *MainFileEnd;
72 Stmt *CurrentBody;
73 ParentMap *PropParentMap; // created lazily.
74 std::string InFileName;
75 std::unique_ptr<raw_ostream> OutFile;
76 std::string Preamble;
77
78 TypeDecl *ProtocolTypeDecl;
79 VarDecl *GlobalVarDecl;
80 Expr *GlobalConstructionExp;
81 unsigned RewriteFailedDiag;
82 unsigned GlobalBlockRewriteFailedDiag;
83 // ObjC string constant support.
84 unsigned NumObjCStringLiterals;
85 VarDecl *ConstantStringClassReference;
86 RecordDecl *NSStringRecord;
87
88 // ObjC foreach break/continue generation support.
89 int BcLabelCount;
90
91 unsigned TryFinallyContainsReturnDiag;
92 // Needed for super.
93 ObjCMethodDecl *CurMethodDef;
94 RecordDecl *SuperStructDecl;
95 RecordDecl *ConstantStringDecl;
96
97 FunctionDecl *MsgSendFunctionDecl;
98 FunctionDecl *MsgSendSuperFunctionDecl;
99 FunctionDecl *MsgSendStretFunctionDecl;
100 FunctionDecl *MsgSendSuperStretFunctionDecl;
101 FunctionDecl *MsgSendFpretFunctionDecl;
102 FunctionDecl *GetClassFunctionDecl;
103 FunctionDecl *GetMetaClassFunctionDecl;
104 FunctionDecl *GetSuperClassFunctionDecl;
105 FunctionDecl *SelGetUidFunctionDecl;
106 FunctionDecl *CFStringFunctionDecl;
107 FunctionDecl *SuperConstructorFunctionDecl;
108 FunctionDecl *CurFunctionDef;
109
110 /* Misc. containers needed for meta-data rewrite. */
111 SmallVector<ObjCImplementationDecl *, 8> ClassImplementation;
112 SmallVector<ObjCCategoryImplDecl *, 8> CategoryImplementation;
113 llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCSynthesizedStructs;
114 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> ObjCSynthesizedProtocols;
115 llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCWrittenInterfaces;
116 llvm::SmallPtrSet<TagDecl*, 32> GlobalDefinedTags;
117 SmallVector<ObjCInterfaceDecl*, 32> ObjCInterfacesSeen;
118 /// DefinedNonLazyClasses - List of defined "non-lazy" classes.
119 SmallVector<ObjCInterfaceDecl*, 8> DefinedNonLazyClasses;
120
121 /// DefinedNonLazyCategories - List of defined "non-lazy" categories.
122 SmallVector<ObjCCategoryDecl *, 8> DefinedNonLazyCategories;
123
124 SmallVector<Stmt *, 32> Stmts;
125 SmallVector<int, 8> ObjCBcLabelNo;
126 // Remember all the @protocol(<expr>) expressions.
127 llvm::SmallPtrSet<ObjCProtocolDecl *, 32> ProtocolExprDecls;
128
129 llvm::DenseSet<uint64_t> CopyDestroyCache;
130
131 // Block expressions.
132 SmallVector<BlockExpr *, 32> Blocks;
133 SmallVector<int, 32> InnerDeclRefsCount;
134 SmallVector<DeclRefExpr *, 32> InnerDeclRefs;
135
136 SmallVector<DeclRefExpr *, 32> BlockDeclRefs;
137
138 // Block related declarations.
139 SmallVector<ValueDecl *, 8> BlockByCopyDecls;
140 llvm::SmallPtrSet<ValueDecl *, 8> BlockByCopyDeclsPtrSet;
141 SmallVector<ValueDecl *, 8> BlockByRefDecls;
142 llvm::SmallPtrSet<ValueDecl *, 8> BlockByRefDeclsPtrSet;
143 llvm::DenseMap<ValueDecl *, unsigned> BlockByRefDeclNo;
144 llvm::SmallPtrSet<ValueDecl *, 8> ImportedBlockDecls;
145 llvm::SmallPtrSet<VarDecl *, 8> ImportedLocalExternalDecls;
146
147 llvm::DenseMap<BlockExpr *, std::string> RewrittenBlockExprs;
148 llvm::DenseMap<ObjCInterfaceDecl *,
149 llvm::SmallSetVector<ObjCIvarDecl *, 8> > ReferencedIvars;
150
151 // ivar bitfield grouping containers
152 llvm::DenseSet<const ObjCInterfaceDecl *> ObjCInterefaceHasBitfieldGroups;
153 llvm::DenseMap<const ObjCIvarDecl* , unsigned> IvarGroupNumber;
154 // This container maps an <class, group number for ivar> tuple to the type
155 // of the struct where the bitfield belongs.
156 llvm::DenseMap<std::pair<const ObjCInterfaceDecl*, unsigned>, QualType> GroupRecordType;
157 SmallVector<FunctionDecl*, 32> FunctionDefinitionsSeen;
158
159 // This maps an original source AST to it's rewritten form. This allows
160 // us to avoid rewriting the same node twice (which is very uncommon).
161 // This is needed to support some of the exotic property rewriting.
162 llvm::DenseMap<Stmt *, Stmt *> ReplacedNodes;
163
164 // Needed for header files being rewritten
165 bool IsHeader;
166 bool SilenceRewriteMacroWarning;
167 bool GenerateLineInfo;
168 bool objc_impl_method;
169
170 bool DisableReplaceStmt;
171 class DisableReplaceStmtScope {
172 RewriteModernObjC &R;
173 bool SavedValue;
174
175 public:
176 DisableReplaceStmtScope(RewriteModernObjC &R)
177 : R(R), SavedValue(R.DisableReplaceStmt) {
178 R.DisableReplaceStmt = true;
179 }
180 ~DisableReplaceStmtScope() {
181 R.DisableReplaceStmt = SavedValue;
182 }
183 };
184 void InitializeCommon(ASTContext &context);
185
186 public:
187 llvm::DenseMap<ObjCMethodDecl*, std::string> MethodInternalNames;
188
189 // Top Level Driver code.
190 bool HandleTopLevelDecl(DeclGroupRef D) override {
191 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
192 if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(*I)) {
193 if (!Class->isThisDeclarationADefinition()) {
194 RewriteForwardClassDecl(D);
195 break;
196 } else {
197 // Keep track of all interface declarations seen.
198 ObjCInterfacesSeen.push_back(Class);
199 break;
200 }
201 }
202
203 if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>(*I)) {
204 if (!Proto->isThisDeclarationADefinition()) {
205 RewriteForwardProtocolDecl(D);
206 break;
207 }
208 }
209
210 if (FunctionDecl *FDecl = dyn_cast<FunctionDecl>(*I)) {
211 // Under modern abi, we cannot translate body of the function
212 // yet until all class extensions and its implementation is seen.
213 // This is because they may introduce new bitfields which must go
214 // into their grouping struct.
215 if (FDecl->isThisDeclarationADefinition() &&
216 // Not c functions defined inside an objc container.
217 !FDecl->isTopLevelDeclInObjCContainer()) {
218 FunctionDefinitionsSeen.push_back(FDecl);
219 break;
220 }
221 }
222 HandleTopLevelSingleDecl(*I);
223 }
224 return true;
225 }
226
227 void HandleTopLevelDeclInObjCContainer(DeclGroupRef D) override {
228 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
229 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(*I)) {
230 if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
231 RewriteBlockPointerDecl(TD);
232 else if (TD->getUnderlyingType()->isFunctionPointerType())
233 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
234 else
235 RewriteObjCQualifiedInterfaceTypes(TD);
236 }
237 }
238 }
239
240 void HandleTopLevelSingleDecl(Decl *D);
241 void HandleDeclInMainFile(Decl *D);
242 RewriteModernObjC(std::string inFile, std::unique_ptr<raw_ostream> OS,
243 DiagnosticsEngine &D, const LangOptions &LOpts,
244 bool silenceMacroWarn, bool LineInfo);
245
246 ~RewriteModernObjC() override {}
247
248 void HandleTranslationUnit(ASTContext &C) override;
249
250 void ReplaceStmt(Stmt *Old, Stmt *New) {
251 ReplaceStmtWithRange(Old, New, Old->getSourceRange());
252 }
253
254 void ReplaceStmtWithRange(Stmt *Old, Stmt *New, SourceRange SrcRange) {
255 assert(Old != nullptr && New != nullptr && "Expected non-null Stmt's")((Old != nullptr && New != nullptr && "Expected non-null Stmt's"
) ? static_cast<void> (0) : __assert_fail ("Old != nullptr && New != nullptr && \"Expected non-null Stmt's\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 255, __PRETTY_FUNCTION__))
;
256
257 Stmt *ReplacingStmt = ReplacedNodes[Old];
258 if (ReplacingStmt)
259 return; // We can't rewrite the same node twice.
260
261 if (DisableReplaceStmt)
262 return;
263
264 // Measure the old text.
265 int Size = Rewrite.getRangeSize(SrcRange);
266 if (Size == -1) {
267 Diags.Report(Context->getFullLoc(Old->getBeginLoc()), RewriteFailedDiag)
268 << Old->getSourceRange();
269 return;
270 }
271 // Get the new text.
272 std::string SStr;
273 llvm::raw_string_ostream S(SStr);
274 New->printPretty(S, nullptr, PrintingPolicy(LangOpts));
275 const std::string &Str = S.str();
276
277 // If replacement succeeded or warning disabled return with no warning.
278 if (!Rewrite.ReplaceText(SrcRange.getBegin(), Size, Str)) {
279 ReplacedNodes[Old] = New;
280 return;
281 }
282 if (SilenceRewriteMacroWarning)
283 return;
284 Diags.Report(Context->getFullLoc(Old->getBeginLoc()), RewriteFailedDiag)
285 << Old->getSourceRange();
286 }
287
288 void InsertText(SourceLocation Loc, StringRef Str,
289 bool InsertAfter = true) {
290 // If insertion succeeded or warning disabled return with no warning.
291 if (!Rewrite.InsertText(Loc, Str, InsertAfter) ||
292 SilenceRewriteMacroWarning)
293 return;
294
295 Diags.Report(Context->getFullLoc(Loc), RewriteFailedDiag);
296 }
297
298 void ReplaceText(SourceLocation Start, unsigned OrigLength,
299 StringRef Str) {
300 // If removal succeeded or warning disabled return with no warning.
301 if (!Rewrite.ReplaceText(Start, OrigLength, Str) ||
302 SilenceRewriteMacroWarning)
303 return;
304
305 Diags.Report(Context->getFullLoc(Start), RewriteFailedDiag);
306 }
307
308 // Syntactic Rewriting.
309 void RewriteRecordBody(RecordDecl *RD);
310 void RewriteInclude();
311 void RewriteLineDirective(const Decl *D);
312 void ConvertSourceLocationToLineDirective(SourceLocation Loc,
313 std::string &LineString);
314 void RewriteForwardClassDecl(DeclGroupRef D);
315 void RewriteForwardClassDecl(const SmallVectorImpl<Decl *> &DG);
316 void RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
317 const std::string &typedefString);
318 void RewriteImplementations();
319 void RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
320 ObjCImplementationDecl *IMD,
321 ObjCCategoryImplDecl *CID);
322 void RewriteInterfaceDecl(ObjCInterfaceDecl *Dcl);
323 void RewriteImplementationDecl(Decl *Dcl);
324 void RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
325 ObjCMethodDecl *MDecl, std::string &ResultStr);
326 void RewriteTypeIntoString(QualType T, std::string &ResultStr,
327 const FunctionType *&FPRetType);
328 void RewriteByRefString(std::string &ResultStr, const std::string &Name,
329 ValueDecl *VD, bool def=false);
330 void RewriteCategoryDecl(ObjCCategoryDecl *Dcl);
331 void RewriteProtocolDecl(ObjCProtocolDecl *Dcl);
332 void RewriteForwardProtocolDecl(DeclGroupRef D);
333 void RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG);
334 void RewriteMethodDeclaration(ObjCMethodDecl *Method);
335 void RewriteProperty(ObjCPropertyDecl *prop);
336 void RewriteFunctionDecl(FunctionDecl *FD);
337 void RewriteBlockPointerType(std::string& Str, QualType Type);
338 void RewriteBlockPointerTypeVariable(std::string& Str, ValueDecl *VD);
339 void RewriteBlockLiteralFunctionDecl(FunctionDecl *FD);
340 void RewriteObjCQualifiedInterfaceTypes(Decl *Dcl);
341 void RewriteTypeOfDecl(VarDecl *VD);
342 void RewriteObjCQualifiedInterfaceTypes(Expr *E);
343
344 std::string getIvarAccessString(ObjCIvarDecl *D);
345
346 // Expression Rewriting.
347 Stmt *RewriteFunctionBodyOrGlobalInitializer(Stmt *S);
348 Stmt *RewriteAtEncode(ObjCEncodeExpr *Exp);
349 Stmt *RewritePropertyOrImplicitGetter(PseudoObjectExpr *Pseudo);
350 Stmt *RewritePropertyOrImplicitSetter(PseudoObjectExpr *Pseudo);
351 Stmt *RewriteAtSelector(ObjCSelectorExpr *Exp);
352 Stmt *RewriteMessageExpr(ObjCMessageExpr *Exp);
353 Stmt *RewriteObjCStringLiteral(ObjCStringLiteral *Exp);
354 Stmt *RewriteObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Exp);
355 Stmt *RewriteObjCBoxedExpr(ObjCBoxedExpr *Exp);
356 Stmt *RewriteObjCArrayLiteralExpr(ObjCArrayLiteral *Exp);
357 Stmt *RewriteObjCDictionaryLiteralExpr(ObjCDictionaryLiteral *Exp);
358 Stmt *RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp);
359 Stmt *RewriteObjCTryStmt(ObjCAtTryStmt *S);
360 Stmt *RewriteObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S);
361 Stmt *RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S);
362 Stmt *RewriteObjCThrowStmt(ObjCAtThrowStmt *S);
363 Stmt *RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
364 SourceLocation OrigEnd);
365 Stmt *RewriteBreakStmt(BreakStmt *S);
366 Stmt *RewriteContinueStmt(ContinueStmt *S);
367 void RewriteCastExpr(CStyleCastExpr *CE);
368 void RewriteImplicitCastObjCExpr(CastExpr *IE);
369
370 // Computes ivar bitfield group no.
371 unsigned ObjCIvarBitfieldGroupNo(ObjCIvarDecl *IV);
372 // Names field decl. for ivar bitfield group.
373 void ObjCIvarBitfieldGroupDecl(ObjCIvarDecl *IV, std::string &Result);
374 // Names struct type for ivar bitfield group.
375 void ObjCIvarBitfieldGroupType(ObjCIvarDecl *IV, std::string &Result);
376 // Names symbol for ivar bitfield group field offset.
377 void ObjCIvarBitfieldGroupOffset(ObjCIvarDecl *IV, std::string &Result);
378 // Given an ivar bitfield, it builds (or finds) its group record type.
379 QualType GetGroupRecordTypeForObjCIvarBitfield(ObjCIvarDecl *IV);
380 QualType SynthesizeBitfieldGroupStructType(
381 ObjCIvarDecl *IV,
382 SmallVectorImpl<ObjCIvarDecl *> &IVars);
383
384 // Block rewriting.
385 void RewriteBlocksInFunctionProtoType(QualType funcType, NamedDecl *D);
386
387 // Block specific rewrite rules.
388 void RewriteBlockPointerDecl(NamedDecl *VD);
389 void RewriteByRefVar(VarDecl *VD, bool firstDecl, bool lastDecl);
390 Stmt *RewriteBlockDeclRefExpr(DeclRefExpr *VD);
391 Stmt *RewriteLocalVariableExternalStorage(DeclRefExpr *DRE);
392 void RewriteBlockPointerFunctionArgs(FunctionDecl *FD);
393
394 void RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
395 std::string &Result);
396
397 void RewriteObjCFieldDecl(FieldDecl *fieldDecl, std::string &Result);
398 bool IsTagDefinedInsideClass(ObjCContainerDecl *IDecl, TagDecl *Tag,
399 bool &IsNamedDefinition);
400 void RewriteLocallyDefinedNamedAggregates(FieldDecl *fieldDecl,
401 std::string &Result);
402
403 bool RewriteObjCFieldDeclType(QualType &Type, std::string &Result);
404
405 void RewriteIvarOffsetSymbols(ObjCInterfaceDecl *CDecl,
406 std::string &Result);
407
408 void Initialize(ASTContext &context) override;
409
410 // Misc. AST transformation routines. Sometimes they end up calling
411 // rewriting routines on the new ASTs.
412 CallExpr *SynthesizeCallToFunctionDecl(FunctionDecl *FD,
413 ArrayRef<Expr *> Args,
414 SourceLocation StartLoc=SourceLocation(),
415 SourceLocation EndLoc=SourceLocation());
416
417 Expr *SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
418 QualType returnType,
419 SmallVectorImpl<QualType> &ArgTypes,
420 SmallVectorImpl<Expr*> &MsgExprs,
421 ObjCMethodDecl *Method);
422
423 Stmt *SynthMessageExpr(ObjCMessageExpr *Exp,
424 SourceLocation StartLoc=SourceLocation(),
425 SourceLocation EndLoc=SourceLocation());
426
427 void SynthCountByEnumWithState(std::string &buf);
428 void SynthMsgSendFunctionDecl();
429 void SynthMsgSendSuperFunctionDecl();
430 void SynthMsgSendStretFunctionDecl();
431 void SynthMsgSendFpretFunctionDecl();
432 void SynthMsgSendSuperStretFunctionDecl();
433 void SynthGetClassFunctionDecl();
434 void SynthGetMetaClassFunctionDecl();
435 void SynthGetSuperClassFunctionDecl();
436 void SynthSelGetUidFunctionDecl();
437 void SynthSuperConstructorFunctionDecl();
438
439 // Rewriting metadata
440 template<typename MethodIterator>
441 void RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
442 MethodIterator MethodEnd,
443 bool IsInstanceMethod,
444 StringRef prefix,
445 StringRef ClassName,
446 std::string &Result);
447 void RewriteObjCProtocolMetaData(ObjCProtocolDecl *Protocol,
448 std::string &Result);
449 void RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
450 std::string &Result);
451 void RewriteClassSetupInitHook(std::string &Result);
452
453 void RewriteMetaDataIntoBuffer(std::string &Result);
454 void WriteImageInfo(std::string &Result);
455 void RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *CDecl,
456 std::string &Result);
457 void RewriteCategorySetupInitHook(std::string &Result);
458
459 // Rewriting ivar
460 void RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
461 std::string &Result);
462 Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV);
463
464
465 std::string SynthesizeByrefCopyDestroyHelper(VarDecl *VD, int flag);
466 std::string SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
467 StringRef funcName, std::string Tag);
468 std::string SynthesizeBlockFunc(BlockExpr *CE, int i,
469 StringRef funcName, std::string Tag);
470 std::string SynthesizeBlockImpl(BlockExpr *CE,
471 std::string Tag, std::string Desc);
472 std::string SynthesizeBlockDescriptor(std::string DescTag,
473 std::string ImplTag,
474 int i, StringRef funcName,
475 unsigned hasCopy);
476 Stmt *SynthesizeBlockCall(CallExpr *Exp, const Expr* BlockExp);
477 void SynthesizeBlockLiterals(SourceLocation FunLocStart,
478 StringRef FunName);
479 FunctionDecl *SynthBlockInitFunctionDecl(StringRef name);
480 Stmt *SynthBlockInitExpr(BlockExpr *Exp,
481 const SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs);
482
483 // Misc. helper routines.
484 QualType getProtocolType();
485 void WarnAboutReturnGotoStmts(Stmt *S);
486 void CheckFunctionPointerDecl(QualType dType, NamedDecl *ND);
487 void InsertBlockLiteralsWithinFunction(FunctionDecl *FD);
488 void InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD);
489
490 bool IsDeclStmtInForeachHeader(DeclStmt *DS);
491 void CollectBlockDeclRefInfo(BlockExpr *Exp);
492 void GetBlockDeclRefExprs(Stmt *S);
493 void GetInnerBlockDeclRefExprs(Stmt *S,
494 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
495 llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts);
496
497 // We avoid calling Type::isBlockPointerType(), since it operates on the
498 // canonical type. We only care if the top-level type is a closure pointer.
499 bool isTopLevelBlockPointerType(QualType T) {
500 return isa<BlockPointerType>(T);
501 }
502
503 /// convertBlockPointerToFunctionPointer - Converts a block-pointer type
504 /// to a function pointer type and upon success, returns true; false
505 /// otherwise.
506 bool convertBlockPointerToFunctionPointer(QualType &T) {
507 if (isTopLevelBlockPointerType(T)) {
508 const auto *BPT = T->castAs<BlockPointerType>();
509 T = Context->getPointerType(BPT->getPointeeType());
510 return true;
511 }
512 return false;
513 }
514
515 bool convertObjCTypeToCStyleType(QualType &T);
516
517 bool needToScanForQualifiers(QualType T);
518 QualType getSuperStructType();
519 QualType getConstantStringStructType();
520 QualType convertFunctionTypeOfBlocks(const FunctionType *FT);
521
522 void convertToUnqualifiedObjCType(QualType &T) {
523 if (T->isObjCQualifiedIdType()) {
524 bool isConst = T.isConstQualified();
525 T = isConst ? Context->getObjCIdType().withConst()
526 : Context->getObjCIdType();
527 }
528 else if (T->isObjCQualifiedClassType())
529 T = Context->getObjCClassType();
530 else if (T->isObjCObjectPointerType() &&
531 T->getPointeeType()->isObjCQualifiedInterfaceType()) {
532 if (const ObjCObjectPointerType * OBJPT =
533 T->getAsObjCInterfacePointerType()) {
534 const ObjCInterfaceType *IFaceT = OBJPT->getInterfaceType();
535 T = QualType(IFaceT, 0);
536 T = Context->getPointerType(T);
537 }
538 }
539 }
540
541 // FIXME: This predicate seems like it would be useful to add to ASTContext.
542 bool isObjCType(QualType T) {
543 if (!LangOpts.ObjC)
544 return false;
545
546 QualType OCT = Context->getCanonicalType(T).getUnqualifiedType();
547
548 if (OCT == Context->getCanonicalType(Context->getObjCIdType()) ||
549 OCT == Context->getCanonicalType(Context->getObjCClassType()))
550 return true;
551
552 if (const PointerType *PT = OCT->getAs<PointerType>()) {
553 if (isa<ObjCInterfaceType>(PT->getPointeeType()) ||
554 PT->getPointeeType()->isObjCQualifiedIdType())
555 return true;
556 }
557 return false;
558 }
559
560 bool PointerTypeTakesAnyBlockArguments(QualType QT);
561 bool PointerTypeTakesAnyObjCQualifiedType(QualType QT);
562 void GetExtentOfArgList(const char *Name, const char *&LParen,
563 const char *&RParen);
564
565 void QuoteDoublequotes(std::string &From, std::string &To) {
566 for (unsigned i = 0; i < From.length(); i++) {
567 if (From[i] == '"')
568 To += "\\\"";
569 else
570 To += From[i];
571 }
572 }
573
574 QualType getSimpleFunctionType(QualType result,
575 ArrayRef<QualType> args,
576 bool variadic = false) {
577 if (result == Context->getObjCInstanceType())
578 result = Context->getObjCIdType();
579 FunctionProtoType::ExtProtoInfo fpi;
580 fpi.Variadic = variadic;
581 return Context->getFunctionType(result, args, fpi);
582 }
583
584 // Helper function: create a CStyleCastExpr with trivial type source info.
585 CStyleCastExpr* NoTypeInfoCStyleCastExpr(ASTContext *Ctx, QualType Ty,
586 CastKind Kind, Expr *E) {
587 TypeSourceInfo *TInfo = Ctx->getTrivialTypeSourceInfo(Ty, SourceLocation());
588 return CStyleCastExpr::Create(*Ctx, Ty, VK_RValue, Kind, E, nullptr,
589 TInfo, SourceLocation(), SourceLocation());
590 }
591
592 bool ImplementationIsNonLazy(const ObjCImplDecl *OD) const {
593 IdentifierInfo* II = &Context->Idents.get("load");
594 Selector LoadSel = Context->Selectors.getSelector(0, &II);
595 return OD->getClassMethod(LoadSel) != nullptr;
596 }
597
598 StringLiteral *getStringLiteral(StringRef Str) {
599 QualType StrType = Context->getConstantArrayType(
600 Context->CharTy, llvm::APInt(32, Str.size() + 1), nullptr,
601 ArrayType::Normal, 0);
602 return StringLiteral::Create(*Context, Str, StringLiteral::Ascii,
603 /*Pascal=*/false, StrType, SourceLocation());
604 }
605 };
606} // end anonymous namespace
607
608void RewriteModernObjC::RewriteBlocksInFunctionProtoType(QualType funcType,
609 NamedDecl *D) {
610 if (const FunctionProtoType *fproto
611 = dyn_cast<FunctionProtoType>(funcType.IgnoreParens())) {
612 for (const auto &I : fproto->param_types())
613 if (isTopLevelBlockPointerType(I)) {
614 // All the args are checked/rewritten. Don't call twice!
615 RewriteBlockPointerDecl(D);
616 break;
617 }
618 }
619}
620
621void RewriteModernObjC::CheckFunctionPointerDecl(QualType funcType, NamedDecl *ND) {
622 const PointerType *PT = funcType->getAs<PointerType>();
623 if (PT && PointerTypeTakesAnyBlockArguments(funcType))
624 RewriteBlocksInFunctionProtoType(PT->getPointeeType(), ND);
625}
626
627static bool IsHeaderFile(const std::string &Filename) {
628 std::string::size_type DotPos = Filename.rfind('.');
629
630 if (DotPos == std::string::npos) {
631 // no file extension
632 return false;
633 }
634
635 std::string Ext = std::string(Filename.begin()+DotPos+1, Filename.end());
636 // C header: .h
637 // C++ header: .hh or .H;
638 return Ext == "h" || Ext == "hh" || Ext == "H";
639}
640
641RewriteModernObjC::RewriteModernObjC(std::string inFile,
642 std::unique_ptr<raw_ostream> OS,
643 DiagnosticsEngine &D,
644 const LangOptions &LOpts,
645 bool silenceMacroWarn, bool LineInfo)
646 : Diags(D), LangOpts(LOpts), InFileName(inFile), OutFile(std::move(OS)),
647 SilenceRewriteMacroWarning(silenceMacroWarn), GenerateLineInfo(LineInfo) {
648 IsHeader = IsHeaderFile(inFile);
649 RewriteFailedDiag = Diags.getCustomDiagID(DiagnosticsEngine::Warning,
650 "rewriting sub-expression within a macro (may not be correct)");
651 // FIXME. This should be an error. But if block is not called, it is OK. And it
652 // may break including some headers.
653 GlobalBlockRewriteFailedDiag = Diags.getCustomDiagID(DiagnosticsEngine::Warning,
654 "rewriting block literal declared in global scope is not implemented");
655
656 TryFinallyContainsReturnDiag = Diags.getCustomDiagID(
657 DiagnosticsEngine::Warning,
658 "rewriter doesn't support user-specified control flow semantics "
659 "for @try/@finally (code may not execute properly)");
660}
661
662std::unique_ptr<ASTConsumer> clang::CreateModernObjCRewriter(
663 const std::string &InFile, std::unique_ptr<raw_ostream> OS,
664 DiagnosticsEngine &Diags, const LangOptions &LOpts,
665 bool SilenceRewriteMacroWarning, bool LineInfo) {
666 return std::make_unique<RewriteModernObjC>(InFile, std::move(OS), Diags,
667 LOpts, SilenceRewriteMacroWarning,
668 LineInfo);
669}
670
671void RewriteModernObjC::InitializeCommon(ASTContext &context) {
672 Context = &context;
673 SM = &Context->getSourceManager();
674 TUDecl = Context->getTranslationUnitDecl();
675 MsgSendFunctionDecl = nullptr;
676 MsgSendSuperFunctionDecl = nullptr;
677 MsgSendStretFunctionDecl = nullptr;
678 MsgSendSuperStretFunctionDecl = nullptr;
679 MsgSendFpretFunctionDecl = nullptr;
680 GetClassFunctionDecl = nullptr;
681 GetMetaClassFunctionDecl = nullptr;
682 GetSuperClassFunctionDecl = nullptr;
683 SelGetUidFunctionDecl = nullptr;
684 CFStringFunctionDecl = nullptr;
685 ConstantStringClassReference = nullptr;
686 NSStringRecord = nullptr;
687 CurMethodDef = nullptr;
688 CurFunctionDef = nullptr;
689 GlobalVarDecl = nullptr;
690 GlobalConstructionExp = nullptr;
691 SuperStructDecl = nullptr;
692 ProtocolTypeDecl = nullptr;
693 ConstantStringDecl = nullptr;
694 BcLabelCount = 0;
695 SuperConstructorFunctionDecl = nullptr;
696 NumObjCStringLiterals = 0;
697 PropParentMap = nullptr;
698 CurrentBody = nullptr;
699 DisableReplaceStmt = false;
700 objc_impl_method = false;
701
702 // Get the ID and start/end of the main file.
703 MainFileID = SM->getMainFileID();
704 const llvm::MemoryBuffer *MainBuf = SM->getBuffer(MainFileID);
705 MainFileStart = MainBuf->getBufferStart();
706 MainFileEnd = MainBuf->getBufferEnd();
707
708 Rewrite.setSourceMgr(Context->getSourceManager(), Context->getLangOpts());
709}
710
711//===----------------------------------------------------------------------===//
712// Top Level Driver Code
713//===----------------------------------------------------------------------===//
714
715void RewriteModernObjC::HandleTopLevelSingleDecl(Decl *D) {
716 if (Diags.hasErrorOccurred())
717 return;
718
719 // Two cases: either the decl could be in the main file, or it could be in a
720 // #included file. If the former, rewrite it now. If the later, check to see
721 // if we rewrote the #include/#import.
722 SourceLocation Loc = D->getLocation();
723 Loc = SM->getExpansionLoc(Loc);
724
725 // If this is for a builtin, ignore it.
726 if (Loc.isInvalid()) return;
727
728 // Look for built-in declarations that we need to refer during the rewrite.
729 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
730 RewriteFunctionDecl(FD);
731 } else if (VarDecl *FVD = dyn_cast<VarDecl>(D)) {
732 // declared in <Foundation/NSString.h>
733 if (FVD->getName() == "_NSConstantStringClassReference") {
734 ConstantStringClassReference = FVD;
735 return;
736 }
737 } else if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(D)) {
738 RewriteCategoryDecl(CD);
739 } else if (ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D)) {
740 if (PD->isThisDeclarationADefinition())
741 RewriteProtocolDecl(PD);
742 } else if (LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(D)) {
743 // Recurse into linkage specifications
744 for (DeclContext::decl_iterator DI = LSD->decls_begin(),
745 DIEnd = LSD->decls_end();
746 DI != DIEnd; ) {
747 if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>((*DI))) {
748 if (!IFace->isThisDeclarationADefinition()) {
749 SmallVector<Decl *, 8> DG;
750 SourceLocation StartLoc = IFace->getBeginLoc();
751 do {
752 if (isa<ObjCInterfaceDecl>(*DI) &&
753 !cast<ObjCInterfaceDecl>(*DI)->isThisDeclarationADefinition() &&
754 StartLoc == (*DI)->getBeginLoc())
755 DG.push_back(*DI);
756 else
757 break;
758
759 ++DI;
760 } while (DI != DIEnd);
761 RewriteForwardClassDecl(DG);
762 continue;
763 }
764 else {
765 // Keep track of all interface declarations seen.
766 ObjCInterfacesSeen.push_back(IFace);
767 ++DI;
768 continue;
769 }
770 }
771
772 if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>((*DI))) {
773 if (!Proto->isThisDeclarationADefinition()) {
774 SmallVector<Decl *, 8> DG;
775 SourceLocation StartLoc = Proto->getBeginLoc();
776 do {
777 if (isa<ObjCProtocolDecl>(*DI) &&
778 !cast<ObjCProtocolDecl>(*DI)->isThisDeclarationADefinition() &&
779 StartLoc == (*DI)->getBeginLoc())
780 DG.push_back(*DI);
781 else
782 break;
783
784 ++DI;
785 } while (DI != DIEnd);
786 RewriteForwardProtocolDecl(DG);
787 continue;
788 }
789 }
790
791 HandleTopLevelSingleDecl(*DI);
792 ++DI;
793 }
794 }
795 // If we have a decl in the main file, see if we should rewrite it.
796 if (SM->isWrittenInMainFile(Loc))
797 return HandleDeclInMainFile(D);
798}
799
800//===----------------------------------------------------------------------===//
801// Syntactic (non-AST) Rewriting Code
802//===----------------------------------------------------------------------===//
803
804void RewriteModernObjC::RewriteInclude() {
805 SourceLocation LocStart = SM->getLocForStartOfFile(MainFileID);
806 StringRef MainBuf = SM->getBufferData(MainFileID);
807 const char *MainBufStart = MainBuf.begin();
808 const char *MainBufEnd = MainBuf.end();
809 size_t ImportLen = strlen("import");
810
811 // Loop over the whole file, looking for includes.
812 for (const char *BufPtr = MainBufStart; BufPtr < MainBufEnd; ++BufPtr) {
813 if (*BufPtr == '#') {
814 if (++BufPtr == MainBufEnd)
815 return;
816 while (*BufPtr == ' ' || *BufPtr == '\t')
817 if (++BufPtr == MainBufEnd)
818 return;
819 if (!strncmp(BufPtr, "import", ImportLen)) {
820 // replace import with include
821 SourceLocation ImportLoc =
822 LocStart.getLocWithOffset(BufPtr-MainBufStart);
823 ReplaceText(ImportLoc, ImportLen, "include");
824 BufPtr += ImportLen;
825 }
826 }
827 }
828}
829
830static void WriteInternalIvarName(const ObjCInterfaceDecl *IDecl,
831 ObjCIvarDecl *IvarDecl, std::string &Result) {
832 Result += "OBJC_IVAR_$_";
833 Result += IDecl->getName();
834 Result += "$";
835 Result += IvarDecl->getName();
836}
837
838std::string
839RewriteModernObjC::getIvarAccessString(ObjCIvarDecl *D) {
840 const ObjCInterfaceDecl *ClassDecl = D->getContainingInterface();
841
842 // Build name of symbol holding ivar offset.
843 std::string IvarOffsetName;
844 if (D->isBitField())
845 ObjCIvarBitfieldGroupOffset(D, IvarOffsetName);
846 else
847 WriteInternalIvarName(ClassDecl, D, IvarOffsetName);
848
849 std::string S = "(*(";
850 QualType IvarT = D->getType();
851 if (D->isBitField())
852 IvarT = GetGroupRecordTypeForObjCIvarBitfield(D);
853
854 if (!isa<TypedefType>(IvarT) && IvarT->isRecordType()) {
855 RecordDecl *RD = IvarT->castAs<RecordType>()->getDecl();
856 RD = RD->getDefinition();
857 if (RD && !RD->getDeclName().getAsIdentifierInfo()) {
858 // decltype(((Foo_IMPL*)0)->bar) *
859 auto *CDecl = cast<ObjCContainerDecl>(D->getDeclContext());
860 // ivar in class extensions requires special treatment.
861 if (ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CDecl))
862 CDecl = CatDecl->getClassInterface();
863 std::string RecName = std::string(CDecl->getName());
864 RecName += "_IMPL";
865 RecordDecl *RD =
866 RecordDecl::Create(*Context, TTK_Struct, TUDecl, SourceLocation(),
867 SourceLocation(), &Context->Idents.get(RecName));
868 QualType PtrStructIMPL = Context->getPointerType(Context->getTagDeclType(RD));
869 unsigned UnsignedIntSize =
870 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
871 Expr *Zero = IntegerLiteral::Create(*Context,
872 llvm::APInt(UnsignedIntSize, 0),
873 Context->UnsignedIntTy, SourceLocation());
874 Zero = NoTypeInfoCStyleCastExpr(Context, PtrStructIMPL, CK_BitCast, Zero);
875 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
876 Zero);
877 FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
878 SourceLocation(),
879 &Context->Idents.get(D->getNameAsString()),
880 IvarT, nullptr,
881 /*BitWidth=*/nullptr, /*Mutable=*/true,
882 ICIS_NoInit);
883 MemberExpr *ME = MemberExpr::CreateImplicit(
884 *Context, PE, true, FD, FD->getType(), VK_LValue, OK_Ordinary);
885 IvarT = Context->getDecltypeType(ME, ME->getType());
886 }
887 }
888 convertObjCTypeToCStyleType(IvarT);
889 QualType castT = Context->getPointerType(IvarT);
890 std::string TypeString(castT.getAsString(Context->getPrintingPolicy()));
891 S += TypeString;
892 S += ")";
893
894 // ((char *)self + IVAR_OFFSET_SYMBOL_NAME)
895 S += "((char *)self + ";
896 S += IvarOffsetName;
897 S += "))";
898 if (D->isBitField()) {
899 S += ".";
900 S += D->getNameAsString();
901 }
902 ReferencedIvars[const_cast<ObjCInterfaceDecl *>(ClassDecl)].insert(D);
903 return S;
904}
905
906/// mustSynthesizeSetterGetterMethod - returns true if setter or getter has not
907/// been found in the class implementation. In this case, it must be synthesized.
908static bool mustSynthesizeSetterGetterMethod(ObjCImplementationDecl *IMP,
909 ObjCPropertyDecl *PD,
910 bool getter) {
911 auto *OMD = IMP->getInstanceMethod(getter ? PD->getGetterName()
912 : PD->getSetterName());
913 return !OMD || OMD->isSynthesizedAccessorStub();
914}
915
916void RewriteModernObjC::RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
917 ObjCImplementationDecl *IMD,
918 ObjCCategoryImplDecl *CID) {
919 static bool objcGetPropertyDefined = false;
920 static bool objcSetPropertyDefined = false;
921 SourceLocation startGetterSetterLoc;
922
923 if (PID->getBeginLoc().isValid()) {
924 SourceLocation startLoc = PID->getBeginLoc();
925 InsertText(startLoc, "// ");
926 const char *startBuf = SM->getCharacterData(startLoc);
927 assert((*startBuf == '@') && "bogus @synthesize location")(((*startBuf == '@') && "bogus @synthesize location")
? static_cast<void> (0) : __assert_fail ("(*startBuf == '@') && \"bogus @synthesize location\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 927, __PRETTY_FUNCTION__))
;
928 const char *semiBuf = strchr(startBuf, ';');
929 assert((*semiBuf == ';') && "@synthesize: can't find ';'")(((*semiBuf == ';') && "@synthesize: can't find ';'")
? static_cast<void> (0) : __assert_fail ("(*semiBuf == ';') && \"@synthesize: can't find ';'\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 929, __PRETTY_FUNCTION__))
;
930 startGetterSetterLoc = startLoc.getLocWithOffset(semiBuf-startBuf+1);
931 } else
932 startGetterSetterLoc = IMD ? IMD->getEndLoc() : CID->getEndLoc();
933
934 if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
935 return; // FIXME: is this correct?
936
937 // Generate the 'getter' function.
938 ObjCPropertyDecl *PD = PID->getPropertyDecl();
939 ObjCIvarDecl *OID = PID->getPropertyIvarDecl();
940 assert(IMD && OID && "Synthesized ivars must be attached to @implementation")((IMD && OID && "Synthesized ivars must be attached to @implementation"
) ? static_cast<void> (0) : __assert_fail ("IMD && OID && \"Synthesized ivars must be attached to @implementation\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 940, __PRETTY_FUNCTION__))
;
941
942 unsigned Attributes = PD->getPropertyAttributes();
943 if (mustSynthesizeSetterGetterMethod(IMD, PD, true /*getter*/)) {
944 bool GenGetProperty = !(Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) &&
945 (Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
946 ObjCPropertyDecl::OBJC_PR_copy));
947 std::string Getr;
948 if (GenGetProperty && !objcGetPropertyDefined) {
949 objcGetPropertyDefined = true;
950 // FIXME. Is this attribute correct in all cases?
951 Getr = "\nextern \"C\" __declspec(dllimport) "
952 "id objc_getProperty(id, SEL, long, bool);\n";
953 }
954 RewriteObjCMethodDecl(OID->getContainingInterface(),
955 PID->getGetterMethodDecl(), Getr);
956 Getr += "{ ";
957 // Synthesize an explicit cast to gain access to the ivar.
958 // See objc-act.c:objc_synthesize_new_getter() for details.
959 if (GenGetProperty) {
960 // return objc_getProperty(self, _cmd, offsetof(ClassDecl, OID), 1)
961 Getr += "typedef ";
962 const FunctionType *FPRetType = nullptr;
963 RewriteTypeIntoString(PID->getGetterMethodDecl()->getReturnType(), Getr,
964 FPRetType);
965 Getr += " _TYPE";
966 if (FPRetType) {
967 Getr += ")"; // close the precedence "scope" for "*".
968
969 // Now, emit the argument types (if any).
970 if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)){
971 Getr += "(";
972 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) {
973 if (i) Getr += ", ";
974 std::string ParamStr =
975 FT->getParamType(i).getAsString(Context->getPrintingPolicy());
976 Getr += ParamStr;
977 }
978 if (FT->isVariadic()) {
979 if (FT->getNumParams())
980 Getr += ", ";
981 Getr += "...";
982 }
983 Getr += ")";
984 } else
985 Getr += "()";
986 }
987 Getr += ";\n";
988 Getr += "return (_TYPE)";
989 Getr += "objc_getProperty(self, _cmd, ";
990 RewriteIvarOffsetComputation(OID, Getr);
991 Getr += ", 1)";
992 }
993 else
994 Getr += "return " + getIvarAccessString(OID);
995 Getr += "; }";
996 InsertText(startGetterSetterLoc, Getr);
997 }
998
999 if (PD->isReadOnly() ||
1000 !mustSynthesizeSetterGetterMethod(IMD, PD, false /*setter*/))
1001 return;
1002
1003 // Generate the 'setter' function.
1004 std::string Setr;
1005 bool GenSetProperty = Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
1006 ObjCPropertyDecl::OBJC_PR_copy);
1007 if (GenSetProperty && !objcSetPropertyDefined) {
1008 objcSetPropertyDefined = true;
1009 // FIXME. Is this attribute correct in all cases?
1010 Setr = "\nextern \"C\" __declspec(dllimport) "
1011 "void objc_setProperty (id, SEL, long, id, bool, bool);\n";
1012 }
1013
1014 RewriteObjCMethodDecl(OID->getContainingInterface(),
1015 PID->getSetterMethodDecl(), Setr);
1016 Setr += "{ ";
1017 // Synthesize an explicit cast to initialize the ivar.
1018 // See objc-act.c:objc_synthesize_new_setter() for details.
1019 if (GenSetProperty) {
1020 Setr += "objc_setProperty (self, _cmd, ";
1021 RewriteIvarOffsetComputation(OID, Setr);
1022 Setr += ", (id)";
1023 Setr += PD->getName();
1024 Setr += ", ";
1025 if (Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic)
1026 Setr += "0, ";
1027 else
1028 Setr += "1, ";
1029 if (Attributes & ObjCPropertyDecl::OBJC_PR_copy)
1030 Setr += "1)";
1031 else
1032 Setr += "0)";
1033 }
1034 else {
1035 Setr += getIvarAccessString(OID) + " = ";
1036 Setr += PD->getName();
1037 }
1038 Setr += "; }\n";
1039 InsertText(startGetterSetterLoc, Setr);
1040}
1041
1042static void RewriteOneForwardClassDecl(ObjCInterfaceDecl *ForwardDecl,
1043 std::string &typedefString) {
1044 typedefString += "\n#ifndef _REWRITER_typedef_";
1045 typedefString += ForwardDecl->getNameAsString();
1046 typedefString += "\n";
1047 typedefString += "#define _REWRITER_typedef_";
1048 typedefString += ForwardDecl->getNameAsString();
1049 typedefString += "\n";
1050 typedefString += "typedef struct objc_object ";
1051 typedefString += ForwardDecl->getNameAsString();
1052 // typedef struct { } _objc_exc_Classname;
1053 typedefString += ";\ntypedef struct {} _objc_exc_";
1054 typedefString += ForwardDecl->getNameAsString();
1055 typedefString += ";\n#endif\n";
1056}
1057
1058void RewriteModernObjC::RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
1059 const std::string &typedefString) {
1060 SourceLocation startLoc = ClassDecl->getBeginLoc();
1061 const char *startBuf = SM->getCharacterData(startLoc);
1062 const char *semiPtr = strchr(startBuf, ';');
1063 // Replace the @class with typedefs corresponding to the classes.
1064 ReplaceText(startLoc, semiPtr-startBuf+1, typedefString);
1065}
1066
1067void RewriteModernObjC::RewriteForwardClassDecl(DeclGroupRef D) {
1068 std::string typedefString;
1069 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
1070 if (ObjCInterfaceDecl *ForwardDecl = dyn_cast<ObjCInterfaceDecl>(*I)) {
1071 if (I == D.begin()) {
1072 // Translate to typedef's that forward reference structs with the same name
1073 // as the class. As a convenience, we include the original declaration
1074 // as a comment.
1075 typedefString += "// @class ";
1076 typedefString += ForwardDecl->getNameAsString();
1077 typedefString += ";";
1078 }
1079 RewriteOneForwardClassDecl(ForwardDecl, typedefString);
1080 }
1081 else
1082 HandleTopLevelSingleDecl(*I);
1083 }
1084 DeclGroupRef::iterator I = D.begin();
1085 RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(*I), typedefString);
1086}
1087
1088void RewriteModernObjC::RewriteForwardClassDecl(
1089 const SmallVectorImpl<Decl *> &D) {
1090 std::string typedefString;
1091 for (unsigned i = 0; i < D.size(); i++) {
1092 ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(D[i]);
1093 if (i == 0) {
1094 typedefString += "// @class ";
1095 typedefString += ForwardDecl->getNameAsString();
1096 typedefString += ";";
1097 }
1098 RewriteOneForwardClassDecl(ForwardDecl, typedefString);
1099 }
1100 RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(D[0]), typedefString);
1101}
1102
1103void RewriteModernObjC::RewriteMethodDeclaration(ObjCMethodDecl *Method) {
1104 // When method is a synthesized one, such as a getter/setter there is
1105 // nothing to rewrite.
1106 if (Method->isImplicit())
1107 return;
1108 SourceLocation LocStart = Method->getBeginLoc();
1109 SourceLocation LocEnd = Method->getEndLoc();
1110
1111 if (SM->getExpansionLineNumber(LocEnd) >
1112 SM->getExpansionLineNumber(LocStart)) {
1113 InsertText(LocStart, "#if 0\n");
1114 ReplaceText(LocEnd, 1, ";\n#endif\n");
1115 } else {
1116 InsertText(LocStart, "// ");
1117 }
1118}
1119
1120void RewriteModernObjC::RewriteProperty(ObjCPropertyDecl *prop) {
1121 SourceLocation Loc = prop->getAtLoc();
1122
1123 ReplaceText(Loc, 0, "// ");
1124 // FIXME: handle properties that are declared across multiple lines.
1125}
1126
1127void RewriteModernObjC::RewriteCategoryDecl(ObjCCategoryDecl *CatDecl) {
1128 SourceLocation LocStart = CatDecl->getBeginLoc();
1129
1130 // FIXME: handle category headers that are declared across multiple lines.
1131 if (CatDecl->getIvarRBraceLoc().isValid()) {
1132 ReplaceText(LocStart, 1, "/** ");
1133 ReplaceText(CatDecl->getIvarRBraceLoc(), 1, "**/ ");
1134 }
1135 else {
1136 ReplaceText(LocStart, 0, "// ");
1137 }
1138
1139 for (auto *I : CatDecl->instance_properties())
1140 RewriteProperty(I);
1141
1142 for (auto *I : CatDecl->instance_methods())
1143 RewriteMethodDeclaration(I);
1144 for (auto *I : CatDecl->class_methods())
1145 RewriteMethodDeclaration(I);
1146
1147 // Lastly, comment out the @end.
1148 ReplaceText(CatDecl->getAtEndRange().getBegin(),
1149 strlen("@end"), "/* @end */\n");
1150}
1151
1152void RewriteModernObjC::RewriteProtocolDecl(ObjCProtocolDecl *PDecl) {
1153 SourceLocation LocStart = PDecl->getBeginLoc();
1154 assert(PDecl->isThisDeclarationADefinition())((PDecl->isThisDeclarationADefinition()) ? static_cast<
void> (0) : __assert_fail ("PDecl->isThisDeclarationADefinition()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1154, __PRETTY_FUNCTION__))
;
1155
1156 // FIXME: handle protocol headers that are declared across multiple lines.
1157 ReplaceText(LocStart, 0, "// ");
1158
1159 for (auto *I : PDecl->instance_methods())
1160 RewriteMethodDeclaration(I);
1161 for (auto *I : PDecl->class_methods())
1162 RewriteMethodDeclaration(I);
1163 for (auto *I : PDecl->instance_properties())
1164 RewriteProperty(I);
1165
1166 // Lastly, comment out the @end.
1167 SourceLocation LocEnd = PDecl->getAtEndRange().getBegin();
1168 ReplaceText(LocEnd, strlen("@end"), "/* @end */\n");
1169
1170 // Must comment out @optional/@required
1171 const char *startBuf = SM->getCharacterData(LocStart);
1172 const char *endBuf = SM->getCharacterData(LocEnd);
1173 for (const char *p = startBuf; p < endBuf; p++) {
1174 if (*p == '@' && !strncmp(p+1, "optional", strlen("optional"))) {
1175 SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
1176 ReplaceText(OptionalLoc, strlen("@optional"), "/* @optional */");
1177
1178 }
1179 else if (*p == '@' && !strncmp(p+1, "required", strlen("required"))) {
1180 SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
1181 ReplaceText(OptionalLoc, strlen("@required"), "/* @required */");
1182
1183 }
1184 }
1185}
1186
1187void RewriteModernObjC::RewriteForwardProtocolDecl(DeclGroupRef D) {
1188 SourceLocation LocStart = (*D.begin())->getBeginLoc();
1189 if (LocStart.isInvalid())
1190 llvm_unreachable("Invalid SourceLocation")::llvm::llvm_unreachable_internal("Invalid SourceLocation", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1190)
;
1191 // FIXME: handle forward protocol that are declared across multiple lines.
1192 ReplaceText(LocStart, 0, "// ");
1193}
1194
1195void
1196RewriteModernObjC::RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG) {
1197 SourceLocation LocStart = DG[0]->getBeginLoc();
1198 if (LocStart.isInvalid())
1199 llvm_unreachable("Invalid SourceLocation")::llvm::llvm_unreachable_internal("Invalid SourceLocation", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1199)
;
1200 // FIXME: handle forward protocol that are declared across multiple lines.
1201 ReplaceText(LocStart, 0, "// ");
1202}
1203
1204void RewriteModernObjC::RewriteTypeIntoString(QualType T, std::string &ResultStr,
1205 const FunctionType *&FPRetType) {
1206 if (T->isObjCQualifiedIdType())
1207 ResultStr += "id";
1208 else if (T->isFunctionPointerType() ||
1209 T->isBlockPointerType()) {
1210 // needs special handling, since pointer-to-functions have special
1211 // syntax (where a decaration models use).
1212 QualType retType = T;
1213 QualType PointeeTy;
1214 if (const PointerType* PT = retType->getAs<PointerType>())
1215 PointeeTy = PT->getPointeeType();
1216 else if (const BlockPointerType *BPT = retType->getAs<BlockPointerType>())
1217 PointeeTy = BPT->getPointeeType();
1218 if ((FPRetType = PointeeTy->getAs<FunctionType>())) {
1219 ResultStr +=
1220 FPRetType->getReturnType().getAsString(Context->getPrintingPolicy());
1221 ResultStr += "(*";
1222 }
1223 } else
1224 ResultStr += T.getAsString(Context->getPrintingPolicy());
1225}
1226
1227void RewriteModernObjC::RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
1228 ObjCMethodDecl *OMD,
1229 std::string &ResultStr) {
1230 //fprintf(stderr,"In RewriteObjCMethodDecl\n");
1231 const FunctionType *FPRetType = nullptr;
1232 ResultStr += "\nstatic ";
1233 RewriteTypeIntoString(OMD->getReturnType(), ResultStr, FPRetType);
1234 ResultStr += " ";
1235
1236 // Unique method name
1237 std::string NameStr;
1238
1239 if (OMD->isInstanceMethod())
1240 NameStr += "_I_";
1241 else
1242 NameStr += "_C_";
1243
1244 NameStr += IDecl->getNameAsString();
1245 NameStr += "_";
1246
1247 if (ObjCCategoryImplDecl *CID =
1248 dyn_cast<ObjCCategoryImplDecl>(OMD->getDeclContext())) {
1249 NameStr += CID->getNameAsString();
1250 NameStr += "_";
1251 }
1252 // Append selector names, replacing ':' with '_'
1253 {
1254 std::string selString = OMD->getSelector().getAsString();
1255 int len = selString.size();
1256 for (int i = 0; i < len; i++)
1257 if (selString[i] == ':')
1258 selString[i] = '_';
1259 NameStr += selString;
1260 }
1261 // Remember this name for metadata emission
1262 MethodInternalNames[OMD] = NameStr;
1263 ResultStr += NameStr;
1264
1265 // Rewrite arguments
1266 ResultStr += "(";
1267
1268 // invisible arguments
1269 if (OMD->isInstanceMethod()) {
1270 QualType selfTy = Context->getObjCInterfaceType(IDecl);
1271 selfTy = Context->getPointerType(selfTy);
1272 if (!LangOpts.MicrosoftExt) {
1273 if (ObjCSynthesizedStructs.count(const_cast<ObjCInterfaceDecl*>(IDecl)))
1274 ResultStr += "struct ";
1275 }
1276 // When rewriting for Microsoft, explicitly omit the structure name.
1277 ResultStr += IDecl->getNameAsString();
1278 ResultStr += " *";
1279 }
1280 else
1281 ResultStr += Context->getObjCClassType().getAsString(
1282 Context->getPrintingPolicy());
1283
1284 ResultStr += " self, ";
1285 ResultStr += Context->getObjCSelType().getAsString(Context->getPrintingPolicy());
1286 ResultStr += " _cmd";
1287
1288 // Method arguments.
1289 for (const auto *PDecl : OMD->parameters()) {
1290 ResultStr += ", ";
1291 if (PDecl->getType()->isObjCQualifiedIdType()) {
1292 ResultStr += "id ";
1293 ResultStr += PDecl->getNameAsString();
1294 } else {
1295 std::string Name = PDecl->getNameAsString();
1296 QualType QT = PDecl->getType();
1297 // Make sure we convert "t (^)(...)" to "t (*)(...)".
1298 (void)convertBlockPointerToFunctionPointer(QT);
1299 QT.getAsStringInternal(Name, Context->getPrintingPolicy());
1300 ResultStr += Name;
1301 }
1302 }
1303 if (OMD->isVariadic())
1304 ResultStr += ", ...";
1305 ResultStr += ") ";
1306
1307 if (FPRetType) {
1308 ResultStr += ")"; // close the precedence "scope" for "*".
1309
1310 // Now, emit the argument types (if any).
1311 if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)) {
1312 ResultStr += "(";
1313 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) {
1314 if (i) ResultStr += ", ";
1315 std::string ParamStr =
1316 FT->getParamType(i).getAsString(Context->getPrintingPolicy());
1317 ResultStr += ParamStr;
1318 }
1319 if (FT->isVariadic()) {
1320 if (FT->getNumParams())
1321 ResultStr += ", ";
1322 ResultStr += "...";
1323 }
1324 ResultStr += ")";
1325 } else {
1326 ResultStr += "()";
1327 }
1328 }
1329}
1330
1331void RewriteModernObjC::RewriteImplementationDecl(Decl *OID) {
1332 ObjCImplementationDecl *IMD = dyn_cast<ObjCImplementationDecl>(OID);
1333 ObjCCategoryImplDecl *CID = dyn_cast<ObjCCategoryImplDecl>(OID);
1334 assert((IMD || CID) && "Unknown implementation type")(((IMD || CID) && "Unknown implementation type") ? static_cast
<void> (0) : __assert_fail ("(IMD || CID) && \"Unknown implementation type\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1334, __PRETTY_FUNCTION__))
;
1335
1336 if (IMD) {
1337 if (IMD->getIvarRBraceLoc().isValid()) {
1338 ReplaceText(IMD->getBeginLoc(), 1, "/** ");
1339 ReplaceText(IMD->getIvarRBraceLoc(), 1, "**/ ");
1340 }
1341 else {
1342 InsertText(IMD->getBeginLoc(), "// ");
1343 }
1344 }
1345 else
1346 InsertText(CID->getBeginLoc(), "// ");
1347
1348 for (auto *OMD : IMD ? IMD->instance_methods() : CID->instance_methods()) {
1349 if (!OMD->getBody())
1350 continue;
1351 std::string ResultStr;
1352 RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
1353 SourceLocation LocStart = OMD->getBeginLoc();
1354 SourceLocation LocEnd = OMD->getCompoundBody()->getBeginLoc();
1355
1356 const char *startBuf = SM->getCharacterData(LocStart);
1357 const char *endBuf = SM->getCharacterData(LocEnd);
1358 ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1359 }
1360
1361 for (auto *OMD : IMD ? IMD->class_methods() : CID->class_methods()) {
1362 if (!OMD->getBody())
1363 continue;
1364 std::string ResultStr;
1365 RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
1366 SourceLocation LocStart = OMD->getBeginLoc();
1367 SourceLocation LocEnd = OMD->getCompoundBody()->getBeginLoc();
1368
1369 const char *startBuf = SM->getCharacterData(LocStart);
1370 const char *endBuf = SM->getCharacterData(LocEnd);
1371 ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1372 }
1373 for (auto *I : IMD ? IMD->property_impls() : CID->property_impls())
1374 RewritePropertyImplDecl(I, IMD, CID);
1375
1376 InsertText(IMD ? IMD->getEndLoc() : CID->getEndLoc(), "// ");
1377}
1378
1379void RewriteModernObjC::RewriteInterfaceDecl(ObjCInterfaceDecl *ClassDecl) {
1380 // Do not synthesize more than once.
1381 if (ObjCSynthesizedStructs.count(ClassDecl))
1382 return;
1383 // Make sure super class's are written before current class is written.
1384 ObjCInterfaceDecl *SuperClass = ClassDecl->getSuperClass();
1385 while (SuperClass) {
1386 RewriteInterfaceDecl(SuperClass);
1387 SuperClass = SuperClass->getSuperClass();
1388 }
1389 std::string ResultStr;
1390 if (!ObjCWrittenInterfaces.count(ClassDecl->getCanonicalDecl())) {
1391 // we haven't seen a forward decl - generate a typedef.
1392 RewriteOneForwardClassDecl(ClassDecl, ResultStr);
1393 RewriteIvarOffsetSymbols(ClassDecl, ResultStr);
1394
1395 RewriteObjCInternalStruct(ClassDecl, ResultStr);
1396 // Mark this typedef as having been written into its c++ equivalent.
1397 ObjCWrittenInterfaces.insert(ClassDecl->getCanonicalDecl());
1398
1399 for (auto *I : ClassDecl->instance_properties())
1400 RewriteProperty(I);
1401 for (auto *I : ClassDecl->instance_methods())
1402 RewriteMethodDeclaration(I);
1403 for (auto *I : ClassDecl->class_methods())
1404 RewriteMethodDeclaration(I);
1405
1406 // Lastly, comment out the @end.
1407 ReplaceText(ClassDecl->getAtEndRange().getBegin(), strlen("@end"),
1408 "/* @end */\n");
1409 }
1410}
1411
1412Stmt *RewriteModernObjC::RewritePropertyOrImplicitSetter(PseudoObjectExpr *PseudoOp) {
1413 SourceRange OldRange = PseudoOp->getSourceRange();
1414
1415 // We just magically know some things about the structure of this
1416 // expression.
1417 ObjCMessageExpr *OldMsg =
1418 cast<ObjCMessageExpr>(PseudoOp->getSemanticExpr(
1419 PseudoOp->getNumSemanticExprs() - 1));
1420
1421 // Because the rewriter doesn't allow us to rewrite rewritten code,
1422 // we need to suppress rewriting the sub-statements.
1423 Expr *Base;
1424 SmallVector<Expr*, 2> Args;
1425 {
1426 DisableReplaceStmtScope S(*this);
1427
1428 // Rebuild the base expression if we have one.
1429 Base = nullptr;
1430 if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1431 Base = OldMsg->getInstanceReceiver();
1432 Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
1433 Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
1434 }
1435
1436 unsigned numArgs = OldMsg->getNumArgs();
1437 for (unsigned i = 0; i < numArgs; i++) {
1438 Expr *Arg = OldMsg->getArg(i);
1439 if (isa<OpaqueValueExpr>(Arg))
1440 Arg = cast<OpaqueValueExpr>(Arg)->getSourceExpr();
1441 Arg = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Arg));
1442 Args.push_back(Arg);
1443 }
1444 }
1445
1446 // TODO: avoid this copy.
1447 SmallVector<SourceLocation, 1> SelLocs;
1448 OldMsg->getSelectorLocs(SelLocs);
1449
1450 ObjCMessageExpr *NewMsg = nullptr;
1451 switch (OldMsg->getReceiverKind()) {
1452 case ObjCMessageExpr::Class:
1453 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1454 OldMsg->getValueKind(),
1455 OldMsg->getLeftLoc(),
1456 OldMsg->getClassReceiverTypeInfo(),
1457 OldMsg->getSelector(),
1458 SelLocs,
1459 OldMsg->getMethodDecl(),
1460 Args,
1461 OldMsg->getRightLoc(),
1462 OldMsg->isImplicit());
1463 break;
1464
1465 case ObjCMessageExpr::Instance:
1466 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1467 OldMsg->getValueKind(),
1468 OldMsg->getLeftLoc(),
1469 Base,
1470 OldMsg->getSelector(),
1471 SelLocs,
1472 OldMsg->getMethodDecl(),
1473 Args,
1474 OldMsg->getRightLoc(),
1475 OldMsg->isImplicit());
1476 break;
1477
1478 case ObjCMessageExpr::SuperClass:
1479 case ObjCMessageExpr::SuperInstance:
1480 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1481 OldMsg->getValueKind(),
1482 OldMsg->getLeftLoc(),
1483 OldMsg->getSuperLoc(),
1484 OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1485 OldMsg->getSuperType(),
1486 OldMsg->getSelector(),
1487 SelLocs,
1488 OldMsg->getMethodDecl(),
1489 Args,
1490 OldMsg->getRightLoc(),
1491 OldMsg->isImplicit());
1492 break;
1493 }
1494
1495 Stmt *Replacement = SynthMessageExpr(NewMsg);
1496 ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
1497 return Replacement;
1498}
1499
1500Stmt *RewriteModernObjC::RewritePropertyOrImplicitGetter(PseudoObjectExpr *PseudoOp) {
1501 SourceRange OldRange = PseudoOp->getSourceRange();
1502
1503 // We just magically know some things about the structure of this
1504 // expression.
1505 ObjCMessageExpr *OldMsg =
1506 cast<ObjCMessageExpr>(PseudoOp->getResultExpr()->IgnoreImplicit());
1507
1508 // Because the rewriter doesn't allow us to rewrite rewritten code,
1509 // we need to suppress rewriting the sub-statements.
1510 Expr *Base = nullptr;
1511 SmallVector<Expr*, 1> Args;
1512 {
1513 DisableReplaceStmtScope S(*this);
1514 // Rebuild the base expression if we have one.
1515 if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1516 Base = OldMsg->getInstanceReceiver();
1517 Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
1518 Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
1519 }
1520 unsigned numArgs = OldMsg->getNumArgs();
1521 for (unsigned i = 0; i < numArgs; i++) {
1522 Expr *Arg = OldMsg->getArg(i);
1523 if (isa<OpaqueValueExpr>(Arg))
1524 Arg = cast<OpaqueValueExpr>(Arg)->getSourceExpr();
1525 Arg = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Arg));
1526 Args.push_back(Arg);
1527 }
1528 }
1529
1530 // Intentionally empty.
1531 SmallVector<SourceLocation, 1> SelLocs;
1532
1533 ObjCMessageExpr *NewMsg = nullptr;
1534 switch (OldMsg->getReceiverKind()) {
1535 case ObjCMessageExpr::Class:
1536 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1537 OldMsg->getValueKind(),
1538 OldMsg->getLeftLoc(),
1539 OldMsg->getClassReceiverTypeInfo(),
1540 OldMsg->getSelector(),
1541 SelLocs,
1542 OldMsg->getMethodDecl(),
1543 Args,
1544 OldMsg->getRightLoc(),
1545 OldMsg->isImplicit());
1546 break;
1547
1548 case ObjCMessageExpr::Instance:
1549 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1550 OldMsg->getValueKind(),
1551 OldMsg->getLeftLoc(),
1552 Base,
1553 OldMsg->getSelector(),
1554 SelLocs,
1555 OldMsg->getMethodDecl(),
1556 Args,
1557 OldMsg->getRightLoc(),
1558 OldMsg->isImplicit());
1559 break;
1560
1561 case ObjCMessageExpr::SuperClass:
1562 case ObjCMessageExpr::SuperInstance:
1563 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1564 OldMsg->getValueKind(),
1565 OldMsg->getLeftLoc(),
1566 OldMsg->getSuperLoc(),
1567 OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1568 OldMsg->getSuperType(),
1569 OldMsg->getSelector(),
1570 SelLocs,
1571 OldMsg->getMethodDecl(),
1572 Args,
1573 OldMsg->getRightLoc(),
1574 OldMsg->isImplicit());
1575 break;
1576 }
1577
1578 Stmt *Replacement = SynthMessageExpr(NewMsg);
1579 ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
1580 return Replacement;
1581}
1582
1583/// SynthCountByEnumWithState - To print:
1584/// ((NSUInteger (*)
1585/// (id, SEL, struct __objcFastEnumerationState *, id *, NSUInteger))
1586/// (void *)objc_msgSend)((id)l_collection,
1587/// sel_registerName(
1588/// "countByEnumeratingWithState:objects:count:"),
1589/// &enumState,
1590/// (id *)__rw_items, (NSUInteger)16)
1591///
1592void RewriteModernObjC::SynthCountByEnumWithState(std::string &buf) {
1593 buf += "((_WIN_NSUInteger (*) (id, SEL, struct __objcFastEnumerationState *, "
1594 "id *, _WIN_NSUInteger))(void *)objc_msgSend)";
1595 buf += "\n\t\t";
1596 buf += "((id)l_collection,\n\t\t";
1597 buf += "sel_registerName(\"countByEnumeratingWithState:objects:count:\"),";
1598 buf += "\n\t\t";
1599 buf += "&enumState, "
1600 "(id *)__rw_items, (_WIN_NSUInteger)16)";
1601}
1602
1603/// RewriteBreakStmt - Rewrite for a break-stmt inside an ObjC2's foreach
1604/// statement to exit to its outer synthesized loop.
1605///
1606Stmt *RewriteModernObjC::RewriteBreakStmt(BreakStmt *S) {
1607 if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
1608 return S;
1609 // replace break with goto __break_label
1610 std::string buf;
1611
1612 SourceLocation startLoc = S->getBeginLoc();
1613 buf = "goto __break_label_";
1614 buf += utostr(ObjCBcLabelNo.back());
1615 ReplaceText(startLoc, strlen("break"), buf);
1616
1617 return nullptr;
1618}
1619
1620void RewriteModernObjC::ConvertSourceLocationToLineDirective(
1621 SourceLocation Loc,
1622 std::string &LineString) {
1623 if (Loc.isFileID() && GenerateLineInfo) {
1624 LineString += "\n#line ";
1625 PresumedLoc PLoc = SM->getPresumedLoc(Loc);
1626 LineString += utostr(PLoc.getLine());
1627 LineString += " \"";
1628 LineString += Lexer::Stringify(PLoc.getFilename());
1629 LineString += "\"\n";
1630 }
1631}
1632
1633/// RewriteContinueStmt - Rewrite for a continue-stmt inside an ObjC2's foreach
1634/// statement to continue with its inner synthesized loop.
1635///
1636Stmt *RewriteModernObjC::RewriteContinueStmt(ContinueStmt *S) {
1637 if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
1638 return S;
1639 // replace continue with goto __continue_label
1640 std::string buf;
1641
1642 SourceLocation startLoc = S->getBeginLoc();
1643 buf = "goto __continue_label_";
1644 buf += utostr(ObjCBcLabelNo.back());
1645 ReplaceText(startLoc, strlen("continue"), buf);
1646
1647 return nullptr;
1648}
1649
1650/// RewriteObjCForCollectionStmt - Rewriter for ObjC2's foreach statement.
1651/// It rewrites:
1652/// for ( type elem in collection) { stmts; }
1653
1654/// Into:
1655/// {
1656/// type elem;
1657/// struct __objcFastEnumerationState enumState = { 0 };
1658/// id __rw_items[16];
1659/// id l_collection = (id)collection;
1660/// NSUInteger limit = [l_collection countByEnumeratingWithState:&enumState
1661/// objects:__rw_items count:16];
1662/// if (limit) {
1663/// unsigned long startMutations = *enumState.mutationsPtr;
1664/// do {
1665/// unsigned long counter = 0;
1666/// do {
1667/// if (startMutations != *enumState.mutationsPtr)
1668/// objc_enumerationMutation(l_collection);
1669/// elem = (type)enumState.itemsPtr[counter++];
1670/// stmts;
1671/// __continue_label: ;
1672/// } while (counter < limit);
1673/// } while ((limit = [l_collection countByEnumeratingWithState:&enumState
1674/// objects:__rw_items count:16]));
1675/// elem = nil;
1676/// __break_label: ;
1677/// }
1678/// else
1679/// elem = nil;
1680/// }
1681///
1682Stmt *RewriteModernObjC::RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
1683 SourceLocation OrigEnd) {
1684 assert(!Stmts.empty() && "ObjCForCollectionStmt - Statement stack empty")((!Stmts.empty() && "ObjCForCollectionStmt - Statement stack empty"
) ? static_cast<void> (0) : __assert_fail ("!Stmts.empty() && \"ObjCForCollectionStmt - Statement stack empty\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1684, __PRETTY_FUNCTION__))
;
1685 assert(isa<ObjCForCollectionStmt>(Stmts.back()) &&((isa<ObjCForCollectionStmt>(Stmts.back()) && "ObjCForCollectionStmt Statement stack mismatch"
) ? static_cast<void> (0) : __assert_fail ("isa<ObjCForCollectionStmt>(Stmts.back()) && \"ObjCForCollectionStmt Statement stack mismatch\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1686, __PRETTY_FUNCTION__))
1686 "ObjCForCollectionStmt Statement stack mismatch")((isa<ObjCForCollectionStmt>(Stmts.back()) && "ObjCForCollectionStmt Statement stack mismatch"
) ? static_cast<void> (0) : __assert_fail ("isa<ObjCForCollectionStmt>(Stmts.back()) && \"ObjCForCollectionStmt Statement stack mismatch\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1686, __PRETTY_FUNCTION__))
;
1687 assert(!ObjCBcLabelNo.empty() &&((!ObjCBcLabelNo.empty() && "ObjCForCollectionStmt - Label No stack empty"
) ? static_cast<void> (0) : __assert_fail ("!ObjCBcLabelNo.empty() && \"ObjCForCollectionStmt - Label No stack empty\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1688, __PRETTY_FUNCTION__))
1688 "ObjCForCollectionStmt - Label No stack empty")((!ObjCBcLabelNo.empty() && "ObjCForCollectionStmt - Label No stack empty"
) ? static_cast<void> (0) : __assert_fail ("!ObjCBcLabelNo.empty() && \"ObjCForCollectionStmt - Label No stack empty\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1688, __PRETTY_FUNCTION__))
;
1689
1690 SourceLocation startLoc = S->getBeginLoc();
1691 const char *startBuf = SM->getCharacterData(startLoc);
1692 StringRef elementName;
1693 std::string elementTypeAsString;
1694 std::string buf;
1695 // line directive first.
1696 SourceLocation ForEachLoc = S->getForLoc();
1697 ConvertSourceLocationToLineDirective(ForEachLoc, buf);
1698 buf += "{\n\t";
1699 if (DeclStmt *DS = dyn_cast<DeclStmt>(S->getElement())) {
1700 // type elem;
1701 NamedDecl* D = cast<NamedDecl>(DS->getSingleDecl());
1702 QualType ElementType = cast<ValueDecl>(D)->getType();
1703 if (ElementType->isObjCQualifiedIdType() ||
1704 ElementType->isObjCQualifiedInterfaceType())
1705 // Simply use 'id' for all qualified types.
1706 elementTypeAsString = "id";
1707 else
1708 elementTypeAsString = ElementType.getAsString(Context->getPrintingPolicy());
1709 buf += elementTypeAsString;
1710 buf += " ";
1711 elementName = D->getName();
1712 buf += elementName;
1713 buf += ";\n\t";
1714 }
1715 else {
1716 DeclRefExpr *DR = cast<DeclRefExpr>(S->getElement());
1717 elementName = DR->getDecl()->getName();
1718 ValueDecl *VD = DR->getDecl();
1719 if (VD->getType()->isObjCQualifiedIdType() ||
1720 VD->getType()->isObjCQualifiedInterfaceType())
1721 // Simply use 'id' for all qualified types.
1722 elementTypeAsString = "id";
1723 else
1724 elementTypeAsString = VD->getType().getAsString(Context->getPrintingPolicy());
1725 }
1726
1727 // struct __objcFastEnumerationState enumState = { 0 };
1728 buf += "struct __objcFastEnumerationState enumState = { 0 };\n\t";
1729 // id __rw_items[16];
1730 buf += "id __rw_items[16];\n\t";
1731 // id l_collection = (id)
1732 buf += "id l_collection = (id)";
1733 // Find start location of 'collection' the hard way!
1734 const char *startCollectionBuf = startBuf;
1735 startCollectionBuf += 3; // skip 'for'
1736 startCollectionBuf = strchr(startCollectionBuf, '(');
1737 startCollectionBuf++; // skip '('
1738 // find 'in' and skip it.
1739 while (*startCollectionBuf != ' ' ||
1740 *(startCollectionBuf+1) != 'i' || *(startCollectionBuf+2) != 'n' ||
1741 (*(startCollectionBuf+3) != ' ' &&
1742 *(startCollectionBuf+3) != '[' && *(startCollectionBuf+3) != '('))
1743 startCollectionBuf++;
1744 startCollectionBuf += 3;
1745
1746 // Replace: "for (type element in" with string constructed thus far.
1747 ReplaceText(startLoc, startCollectionBuf - startBuf, buf);
1748 // Replace ')' in for '(' type elem in collection ')' with ';'
1749 SourceLocation rightParenLoc = S->getRParenLoc();
1750 const char *rparenBuf = SM->getCharacterData(rightParenLoc);
1751 SourceLocation lparenLoc = startLoc.getLocWithOffset(rparenBuf-startBuf);
1752 buf = ";\n\t";
1753
1754 // unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
1755 // objects:__rw_items count:16];
1756 // which is synthesized into:
1757 // NSUInteger limit =
1758 // ((NSUInteger (*)
1759 // (id, SEL, struct __objcFastEnumerationState *, id *, NSUInteger))
1760 // (void *)objc_msgSend)((id)l_collection,
1761 // sel_registerName(
1762 // "countByEnumeratingWithState:objects:count:"),
1763 // (struct __objcFastEnumerationState *)&state,
1764 // (id *)__rw_items, (NSUInteger)16);
1765 buf += "_WIN_NSUInteger limit =\n\t\t";
1766 SynthCountByEnumWithState(buf);
1767 buf += ";\n\t";
1768 /// if (limit) {
1769 /// unsigned long startMutations = *enumState.mutationsPtr;
1770 /// do {
1771 /// unsigned long counter = 0;
1772 /// do {
1773 /// if (startMutations != *enumState.mutationsPtr)
1774 /// objc_enumerationMutation(l_collection);
1775 /// elem = (type)enumState.itemsPtr[counter++];
1776 buf += "if (limit) {\n\t";
1777 buf += "unsigned long startMutations = *enumState.mutationsPtr;\n\t";
1778 buf += "do {\n\t\t";
1779 buf += "unsigned long counter = 0;\n\t\t";
1780 buf += "do {\n\t\t\t";
1781 buf += "if (startMutations != *enumState.mutationsPtr)\n\t\t\t\t";
1782 buf += "objc_enumerationMutation(l_collection);\n\t\t\t";
1783 buf += elementName;
1784 buf += " = (";
1785 buf += elementTypeAsString;
1786 buf += ")enumState.itemsPtr[counter++];";
1787 // Replace ')' in for '(' type elem in collection ')' with all of these.
1788 ReplaceText(lparenLoc, 1, buf);
1789
1790 /// __continue_label: ;
1791 /// } while (counter < limit);
1792 /// } while ((limit = [l_collection countByEnumeratingWithState:&enumState
1793 /// objects:__rw_items count:16]));
1794 /// elem = nil;
1795 /// __break_label: ;
1796 /// }
1797 /// else
1798 /// elem = nil;
1799 /// }
1800 ///
1801 buf = ";\n\t";
1802 buf += "__continue_label_";
1803 buf += utostr(ObjCBcLabelNo.back());
1804 buf += ": ;";
1805 buf += "\n\t\t";
1806 buf += "} while (counter < limit);\n\t";
1807 buf += "} while ((limit = ";
1808 SynthCountByEnumWithState(buf);
1809 buf += "));\n\t";
1810 buf += elementName;
1811 buf += " = ((";
1812 buf += elementTypeAsString;
1813 buf += ")0);\n\t";
1814 buf += "__break_label_";
1815 buf += utostr(ObjCBcLabelNo.back());
1816 buf += ": ;\n\t";
1817 buf += "}\n\t";
1818 buf += "else\n\t\t";
1819 buf += elementName;
1820 buf += " = ((";
1821 buf += elementTypeAsString;
1822 buf += ")0);\n\t";
1823 buf += "}\n";
1824
1825 // Insert all these *after* the statement body.
1826 // FIXME: If this should support Obj-C++, support CXXTryStmt
1827 if (isa<CompoundStmt>(S->getBody())) {
1828 SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(1);
1829 InsertText(endBodyLoc, buf);
1830 } else {
1831 /* Need to treat single statements specially. For example:
1832 *
1833 * for (A *a in b) if (stuff()) break;
1834 * for (A *a in b) xxxyy;
1835 *
1836 * The following code simply scans ahead to the semi to find the actual end.
1837 */
1838 const char *stmtBuf = SM->getCharacterData(OrigEnd);
1839 const char *semiBuf = strchr(stmtBuf, ';');
1840 assert(semiBuf && "Can't find ';'")((semiBuf && "Can't find ';'") ? static_cast<void>
(0) : __assert_fail ("semiBuf && \"Can't find ';'\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1840, __PRETTY_FUNCTION__))
;
1841 SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(semiBuf-stmtBuf+1);
1842 InsertText(endBodyLoc, buf);
1843 }
1844 Stmts.pop_back();
1845 ObjCBcLabelNo.pop_back();
1846 return nullptr;
1847}
1848
1849static void Write_RethrowObject(std::string &buf) {
1850 buf += "{ struct _FIN { _FIN(id reth) : rethrow(reth) {}\n";
1851 buf += "\t~_FIN() { if (rethrow) objc_exception_throw(rethrow); }\n";
1852 buf += "\tid rethrow;\n";
1853 buf += "\t} _fin_force_rethow(_rethrow);";
1854}
1855
1856/// RewriteObjCSynchronizedStmt -
1857/// This routine rewrites @synchronized(expr) stmt;
1858/// into:
1859/// objc_sync_enter(expr);
1860/// @try stmt @finally { objc_sync_exit(expr); }
1861///
1862Stmt *RewriteModernObjC::RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
1863 // Get the start location and compute the semi location.
1864 SourceLocation startLoc = S->getBeginLoc();
1865 const char *startBuf = SM->getCharacterData(startLoc);
1866
1867 assert((*startBuf == '@') && "bogus @synchronized location")(((*startBuf == '@') && "bogus @synchronized location"
) ? static_cast<void> (0) : __assert_fail ("(*startBuf == '@') && \"bogus @synchronized location\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1867, __PRETTY_FUNCTION__))
;
1868
1869 std::string buf;
1870 SourceLocation SynchLoc = S->getAtSynchronizedLoc();
1871 ConvertSourceLocationToLineDirective(SynchLoc, buf);
1872 buf += "{ id _rethrow = 0; id _sync_obj = (id)";
1873
1874 const char *lparenBuf = startBuf;
1875 while (*lparenBuf != '(') lparenBuf++;
1876 ReplaceText(startLoc, lparenBuf-startBuf+1, buf);
1877
1878 buf = "; objc_sync_enter(_sync_obj);\n";
1879 buf += "try {\n\tstruct _SYNC_EXIT { _SYNC_EXIT(id arg) : sync_exit(arg) {}";
1880 buf += "\n\t~_SYNC_EXIT() {objc_sync_exit(sync_exit);}";
1881 buf += "\n\tid sync_exit;";
1882 buf += "\n\t} _sync_exit(_sync_obj);\n";
1883
1884 // We can't use S->getSynchExpr()->getEndLoc() to find the end location, since
1885 // the sync expression is typically a message expression that's already
1886 // been rewritten! (which implies the SourceLocation's are invalid).
1887 SourceLocation RParenExprLoc = S->getSynchBody()->getBeginLoc();
1888 const char *RParenExprLocBuf = SM->getCharacterData(RParenExprLoc);
1889 while (*RParenExprLocBuf != ')') RParenExprLocBuf--;
1890 RParenExprLoc = startLoc.getLocWithOffset(RParenExprLocBuf-startBuf);
1891
1892 SourceLocation LBranceLoc = S->getSynchBody()->getBeginLoc();
1893 const char *LBraceLocBuf = SM->getCharacterData(LBranceLoc);
1894 assert (*LBraceLocBuf == '{')((*LBraceLocBuf == '{') ? static_cast<void> (0) : __assert_fail
("*LBraceLocBuf == '{'", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1894, __PRETTY_FUNCTION__))
;
1895 ReplaceText(RParenExprLoc, (LBraceLocBuf - SM->getCharacterData(RParenExprLoc) + 1), buf);
1896
1897 SourceLocation startRBraceLoc = S->getSynchBody()->getEndLoc();
1898 assert((*SM->getCharacterData(startRBraceLoc) == '}') &&(((*SM->getCharacterData(startRBraceLoc) == '}') &&
"bogus @synchronized block") ? static_cast<void> (0) :
__assert_fail ("(*SM->getCharacterData(startRBraceLoc) == '}') && \"bogus @synchronized block\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1899, __PRETTY_FUNCTION__))
1899 "bogus @synchronized block")(((*SM->getCharacterData(startRBraceLoc) == '}') &&
"bogus @synchronized block") ? static_cast<void> (0) :
__assert_fail ("(*SM->getCharacterData(startRBraceLoc) == '}') && \"bogus @synchronized block\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1899, __PRETTY_FUNCTION__))
;
1900
1901 buf = "} catch (id e) {_rethrow = e;}\n";
1902 Write_RethrowObject(buf);
1903 buf += "}\n";
1904 buf += "}\n";
1905
1906 ReplaceText(startRBraceLoc, 1, buf);
1907
1908 return nullptr;
1909}
1910
1911void RewriteModernObjC::WarnAboutReturnGotoStmts(Stmt *S)
1912{
1913 // Perform a bottom up traversal of all children.
1914 for (Stmt *SubStmt : S->children())
1915 if (SubStmt)
1916 WarnAboutReturnGotoStmts(SubStmt);
1917
1918 if (isa<ReturnStmt>(S) || isa<GotoStmt>(S)) {
1919 Diags.Report(Context->getFullLoc(S->getBeginLoc()),
1920 TryFinallyContainsReturnDiag);
1921 }
1922}
1923
1924Stmt *RewriteModernObjC::RewriteObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S) {
1925 SourceLocation startLoc = S->getAtLoc();
1926 ReplaceText(startLoc, strlen("@autoreleasepool"), "/* @autoreleasepool */");
1927 ReplaceText(S->getSubStmt()->getBeginLoc(), 1,
1928 "{ __AtAutoreleasePool __autoreleasepool; ");
1929
1930 return nullptr;
1931}
1932
1933Stmt *RewriteModernObjC::RewriteObjCTryStmt(ObjCAtTryStmt *S) {
1934 ObjCAtFinallyStmt *finalStmt = S->getFinallyStmt();
1935 bool noCatch = S->getNumCatchStmts() == 0;
1936 std::string buf;
1937 SourceLocation TryLocation = S->getAtTryLoc();
1938 ConvertSourceLocationToLineDirective(TryLocation, buf);
1939
1940 if (finalStmt) {
1941 if (noCatch)
1942 buf += "{ id volatile _rethrow = 0;\n";
1943 else {
1944 buf += "{ id volatile _rethrow = 0;\ntry {\n";
1945 }
1946 }
1947 // Get the start location and compute the semi location.
1948 SourceLocation startLoc = S->getBeginLoc();
1949 const char *startBuf = SM->getCharacterData(startLoc);
1950
1951 assert((*startBuf == '@') && "bogus @try location")(((*startBuf == '@') && "bogus @try location") ? static_cast
<void> (0) : __assert_fail ("(*startBuf == '@') && \"bogus @try location\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1951, __PRETTY_FUNCTION__))
;
1952 if (finalStmt)
1953 ReplaceText(startLoc, 1, buf);
1954 else
1955 // @try -> try
1956 ReplaceText(startLoc, 1, "");
1957
1958 for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I) {
1959 ObjCAtCatchStmt *Catch = S->getCatchStmt(I);
1960 VarDecl *catchDecl = Catch->getCatchParamDecl();
1961
1962 startLoc = Catch->getBeginLoc();
1963 bool AtRemoved = false;
1964 if (catchDecl) {
1965 QualType t = catchDecl->getType();
1966 if (const ObjCObjectPointerType *Ptr = t->getAs<ObjCObjectPointerType>()) {
1967 // Should be a pointer to a class.
1968 ObjCInterfaceDecl *IDecl = Ptr->getObjectType()->getInterface();
1969 if (IDecl) {
1970 std::string Result;
1971 ConvertSourceLocationToLineDirective(Catch->getBeginLoc(), Result);
1972
1973 startBuf = SM->getCharacterData(startLoc);
1974 assert((*startBuf == '@') && "bogus @catch location")(((*startBuf == '@') && "bogus @catch location") ? static_cast
<void> (0) : __assert_fail ("(*startBuf == '@') && \"bogus @catch location\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1974, __PRETTY_FUNCTION__))
;
1975 SourceLocation rParenLoc = Catch->getRParenLoc();
1976 const char *rParenBuf = SM->getCharacterData(rParenLoc);
1977
1978 // _objc_exc_Foo *_e as argument to catch.
1979 Result += "catch (_objc_exc_"; Result += IDecl->getNameAsString();
1980 Result += " *_"; Result += catchDecl->getNameAsString();
1981 Result += ")";
1982 ReplaceText(startLoc, rParenBuf-startBuf+1, Result);
1983 // Foo *e = (Foo *)_e;
1984 Result.clear();
1985 Result = "{ ";
1986 Result += IDecl->getNameAsString();
1987 Result += " *"; Result += catchDecl->getNameAsString();
1988 Result += " = ("; Result += IDecl->getNameAsString(); Result += "*)";
1989 Result += "_"; Result += catchDecl->getNameAsString();
1990
1991 Result += "; ";
1992 SourceLocation lBraceLoc = Catch->getCatchBody()->getBeginLoc();
1993 ReplaceText(lBraceLoc, 1, Result);
1994 AtRemoved = true;
1995 }
1996 }
1997 }
1998 if (!AtRemoved)
1999 // @catch -> catch
2000 ReplaceText(startLoc, 1, "");
2001
2002 }
2003 if (finalStmt) {
2004 buf.clear();
2005 SourceLocation FinallyLoc = finalStmt->getBeginLoc();
2006
2007 if (noCatch) {
2008 ConvertSourceLocationToLineDirective(FinallyLoc, buf);
2009 buf += "catch (id e) {_rethrow = e;}\n";
2010 }
2011 else {
2012 buf += "}\n";
2013 ConvertSourceLocationToLineDirective(FinallyLoc, buf);
2014 buf += "catch (id e) {_rethrow = e;}\n";
2015 }
2016
2017 SourceLocation startFinalLoc = finalStmt->getBeginLoc();
2018 ReplaceText(startFinalLoc, 8, buf);
2019 Stmt *body = finalStmt->getFinallyBody();
2020 SourceLocation startFinalBodyLoc = body->getBeginLoc();
2021 buf.clear();
2022 Write_RethrowObject(buf);
2023 ReplaceText(startFinalBodyLoc, 1, buf);
2024
2025 SourceLocation endFinalBodyLoc = body->getEndLoc();
2026 ReplaceText(endFinalBodyLoc, 1, "}\n}");
2027 // Now check for any return/continue/go statements within the @try.
2028 WarnAboutReturnGotoStmts(S->getTryBody());
2029 }
2030
2031 return nullptr;
2032}
2033
2034// This can't be done with ReplaceStmt(S, ThrowExpr), since
2035// the throw expression is typically a message expression that's already
2036// been rewritten! (which implies the SourceLocation's are invalid).
2037Stmt *RewriteModernObjC::RewriteObjCThrowStmt(ObjCAtThrowStmt *S) {
2038 // Get the start location and compute the semi location.
2039 SourceLocation startLoc = S->getBeginLoc();
2040 const char *startBuf = SM->getCharacterData(startLoc);
2041
2042 assert((*startBuf == '@') && "bogus @throw location")(((*startBuf == '@') && "bogus @throw location") ? static_cast
<void> (0) : __assert_fail ("(*startBuf == '@') && \"bogus @throw location\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2042, __PRETTY_FUNCTION__))
;
2043
2044 std::string buf;
2045 /* void objc_exception_throw(id) __attribute__((noreturn)); */
2046 if (S->getThrowExpr())
2047 buf = "objc_exception_throw(";
2048 else
2049 buf = "throw";
2050
2051 // handle "@ throw" correctly.
2052 const char *wBuf = strchr(startBuf, 'w');
2053 assert((*wBuf == 'w') && "@throw: can't find 'w'")(((*wBuf == 'w') && "@throw: can't find 'w'") ? static_cast
<void> (0) : __assert_fail ("(*wBuf == 'w') && \"@throw: can't find 'w'\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2053, __PRETTY_FUNCTION__))
;
2054 ReplaceText(startLoc, wBuf-startBuf+1, buf);
2055
2056 SourceLocation endLoc = S->getEndLoc();
2057 const char *endBuf = SM->getCharacterData(endLoc);
2058 const char *semiBuf = strchr(endBuf, ';');
2059 assert((*semiBuf == ';') && "@throw: can't find ';'")(((*semiBuf == ';') && "@throw: can't find ';'") ? static_cast
<void> (0) : __assert_fail ("(*semiBuf == ';') && \"@throw: can't find ';'\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2059, __PRETTY_FUNCTION__))
;
2060 SourceLocation semiLoc = startLoc.getLocWithOffset(semiBuf-startBuf);
2061 if (S->getThrowExpr())
2062 ReplaceText(semiLoc, 1, ");");
2063 return nullptr;
2064}
2065
2066Stmt *RewriteModernObjC::RewriteAtEncode(ObjCEncodeExpr *Exp) {
2067 // Create a new string expression.
2068 std::string StrEncoding;
2069 Context->getObjCEncodingForType(Exp->getEncodedType(), StrEncoding);
2070 Expr *Replacement = getStringLiteral(StrEncoding);
2071 ReplaceStmt(Exp, Replacement);
2072
2073 // Replace this subexpr in the parent.
2074 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2075 return Replacement;
2076}
2077
2078Stmt *RewriteModernObjC::RewriteAtSelector(ObjCSelectorExpr *Exp) {
2079 if (!SelGetUidFunctionDecl)
2080 SynthSelGetUidFunctionDecl();
2081 assert(SelGetUidFunctionDecl && "Can't find sel_registerName() decl")((SelGetUidFunctionDecl && "Can't find sel_registerName() decl"
) ? static_cast<void> (0) : __assert_fail ("SelGetUidFunctionDecl && \"Can't find sel_registerName() decl\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2081, __PRETTY_FUNCTION__))
;
2082 // Create a call to sel_registerName("selName").
2083 SmallVector<Expr*, 8> SelExprs;
2084 SelExprs.push_back(getStringLiteral(Exp->getSelector().getAsString()));
2085 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2086 SelExprs);
2087 ReplaceStmt(Exp, SelExp);
2088 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2089 return SelExp;
2090}
2091
2092CallExpr *
2093RewriteModernObjC::SynthesizeCallToFunctionDecl(FunctionDecl *FD,
2094 ArrayRef<Expr *> Args,
2095 SourceLocation StartLoc,
2096 SourceLocation EndLoc) {
2097 // Get the type, we will need to reference it in a couple spots.
2098 QualType msgSendType = FD->getType();
2099
2100 // Create a reference to the objc_msgSend() declaration.
2101 DeclRefExpr *DRE = new (Context) DeclRefExpr(*Context, FD, false, msgSendType,
2102 VK_LValue, SourceLocation());
2103
2104 // Now, we cast the reference to a pointer to the objc_msgSend type.
2105 QualType pToFunc = Context->getPointerType(msgSendType);
2106 ImplicitCastExpr *ICE =
2107 ImplicitCastExpr::Create(*Context, pToFunc, CK_FunctionToPointerDecay,
2108 DRE, nullptr, VK_RValue);
2109
2110 const auto *FT = msgSendType->castAs<FunctionType>();
2111 CallExpr *Exp = CallExpr::Create(
2112 *Context, ICE, Args, FT->getCallResultType(*Context), VK_RValue, EndLoc);
2113 return Exp;
2114}
2115
2116static bool scanForProtocolRefs(const char *startBuf, const char *endBuf,
2117 const char *&startRef, const char *&endRef) {
2118 while (startBuf < endBuf) {
2119 if (*startBuf == '<')
2120 startRef = startBuf; // mark the start.
2121 if (*startBuf == '>') {
2122 if (startRef && *startRef == '<') {
2123 endRef = startBuf; // mark the end.
2124 return true;
2125 }
2126 return false;
2127 }
2128 startBuf++;
2129 }
2130 return false;
2131}
2132
2133static void scanToNextArgument(const char *&argRef) {
2134 int angle = 0;
2135 while (*argRef != ')' && (*argRef != ',' || angle > 0)) {
2136 if (*argRef == '<')
2137 angle++;
2138 else if (*argRef == '>')
2139 angle--;
2140 argRef++;
2141 }
2142 assert(angle == 0 && "scanToNextArgument - bad protocol type syntax")((angle == 0 && "scanToNextArgument - bad protocol type syntax"
) ? static_cast<void> (0) : __assert_fail ("angle == 0 && \"scanToNextArgument - bad protocol type syntax\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2142, __PRETTY_FUNCTION__))
;
2143}
2144
2145bool RewriteModernObjC::needToScanForQualifiers(QualType T) {
2146 if (T->isObjCQualifiedIdType())
2147 return true;
2148 if (const PointerType *PT = T->getAs<PointerType>()) {
2149 if (PT->getPointeeType()->isObjCQualifiedIdType())
2150 return true;
2151 }
2152 if (T->isObjCObjectPointerType()) {
2153 T = T->getPointeeType();
2154 return T->isObjCQualifiedInterfaceType();
2155 }
2156 if (T->isArrayType()) {
2157 QualType ElemTy = Context->getBaseElementType(T);
2158 return needToScanForQualifiers(ElemTy);
2159 }
2160 return false;
2161}
2162
2163void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Expr *E) {
2164 QualType Type = E->getType();
2165 if (needToScanForQualifiers(Type)) {
2166 SourceLocation Loc, EndLoc;
2167
2168 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E)) {
2169 Loc = ECE->getLParenLoc();
2170 EndLoc = ECE->getRParenLoc();
2171 } else {
2172 Loc = E->getBeginLoc();
2173 EndLoc = E->getEndLoc();
2174 }
2175 // This will defend against trying to rewrite synthesized expressions.
2176 if (Loc.isInvalid() || EndLoc.isInvalid())
2177 return;
2178
2179 const char *startBuf = SM->getCharacterData(Loc);
2180 const char *endBuf = SM->getCharacterData(EndLoc);
2181 const char *startRef = nullptr, *endRef = nullptr;
2182 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2183 // Get the locations of the startRef, endRef.
2184 SourceLocation LessLoc = Loc.getLocWithOffset(startRef-startBuf);
2185 SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-startBuf+1);
2186 // Comment out the protocol references.
2187 InsertText(LessLoc, "/*");
2188 InsertText(GreaterLoc, "*/");
2189 }
2190 }
2191}
2192
2193void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Decl *Dcl) {
2194 SourceLocation Loc;
2195 QualType Type;
2196 const FunctionProtoType *proto = nullptr;
2197 if (VarDecl *VD = dyn_cast<VarDecl>(Dcl)) {
2198 Loc = VD->getLocation();
2199 Type = VD->getType();
2200 }
2201 else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Dcl)) {
2202 Loc = FD->getLocation();
2203 // Check for ObjC 'id' and class types that have been adorned with protocol
2204 // information (id<p>, C<p>*). The protocol references need to be rewritten!
2205 const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2206 assert(funcType && "missing function type")((funcType && "missing function type") ? static_cast<
void> (0) : __assert_fail ("funcType && \"missing function type\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2206, __PRETTY_FUNCTION__))
;
2207 proto = dyn_cast<FunctionProtoType>(funcType);
2208 if (!proto)
2209 return;
2210 Type = proto->getReturnType();
2211 }
2212 else if (FieldDecl *FD = dyn_cast<FieldDecl>(Dcl)) {
2213 Loc = FD->getLocation();
2214 Type = FD->getType();
2215 }
2216 else if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(Dcl)) {
2217 Loc = TD->getLocation();
2218 Type = TD->getUnderlyingType();
2219 }
2220 else
2221 return;
2222
2223 if (needToScanForQualifiers(Type)) {
2224 // Since types are unique, we need to scan the buffer.
2225
2226 const char *endBuf = SM->getCharacterData(Loc);
2227 const char *startBuf = endBuf;
2228 while (*startBuf != ';' && *startBuf != '<' && startBuf != MainFileStart)
2229 startBuf--; // scan backward (from the decl location) for return type.
2230 const char *startRef = nullptr, *endRef = nullptr;
2231 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2232 // Get the locations of the startRef, endRef.
2233 SourceLocation LessLoc = Loc.getLocWithOffset(startRef-endBuf);
2234 SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-endBuf+1);
2235 // Comment out the protocol references.
2236 InsertText(LessLoc, "/*");
2237 InsertText(GreaterLoc, "*/");
2238 }
2239 }
2240 if (!proto)
2241 return; // most likely, was a variable
2242 // Now check arguments.
2243 const char *startBuf = SM->getCharacterData(Loc);
2244 const char *startFuncBuf = startBuf;
2245 for (unsigned i = 0; i < proto->getNumParams(); i++) {
2246 if (needToScanForQualifiers(proto->getParamType(i))) {
2247 // Since types are unique, we need to scan the buffer.
2248
2249 const char *endBuf = startBuf;
2250 // scan forward (from the decl location) for argument types.
2251 scanToNextArgument(endBuf);
2252 const char *startRef = nullptr, *endRef = nullptr;
2253 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2254 // Get the locations of the startRef, endRef.
2255 SourceLocation LessLoc =
2256 Loc.getLocWithOffset(startRef-startFuncBuf);
2257 SourceLocation GreaterLoc =
2258 Loc.getLocWithOffset(endRef-startFuncBuf+1);
2259 // Comment out the protocol references.
2260 InsertText(LessLoc, "/*");
2261 InsertText(GreaterLoc, "*/");
2262 }
2263 startBuf = ++endBuf;
2264 }
2265 else {
2266 // If the function name is derived from a macro expansion, then the
2267 // argument buffer will not follow the name. Need to speak with Chris.
2268 while (*startBuf && *startBuf != ')' && *startBuf != ',')
2269 startBuf++; // scan forward (from the decl location) for argument types.
2270 startBuf++;
2271 }
2272 }
2273}
2274
2275void RewriteModernObjC::RewriteTypeOfDecl(VarDecl *ND) {
2276 QualType QT = ND->getType();
2277 const Type* TypePtr = QT->getAs<Type>();
2278 if (!isa<TypeOfExprType>(TypePtr))
2279 return;
2280 while (isa<TypeOfExprType>(TypePtr)) {
2281 const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
2282 QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
2283 TypePtr = QT->getAs<Type>();
2284 }
2285 // FIXME. This will not work for multiple declarators; as in:
2286 // __typeof__(a) b,c,d;
2287 std::string TypeAsString(QT.getAsString(Context->getPrintingPolicy()));
2288 SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
2289 const char *startBuf = SM->getCharacterData(DeclLoc);
2290 if (ND->getInit()) {
2291 std::string Name(ND->getNameAsString());
2292 TypeAsString += " " + Name + " = ";
2293 Expr *E = ND->getInit();
2294 SourceLocation startLoc;
2295 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
2296 startLoc = ECE->getLParenLoc();
2297 else
2298 startLoc = E->getBeginLoc();
2299 startLoc = SM->getExpansionLoc(startLoc);
2300 const char *endBuf = SM->getCharacterData(startLoc);
2301 ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
2302 }
2303 else {
2304 SourceLocation X = ND->getEndLoc();
2305 X = SM->getExpansionLoc(X);
2306 const char *endBuf = SM->getCharacterData(X);
2307 ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
2308 }
2309}
2310
2311// SynthSelGetUidFunctionDecl - SEL sel_registerName(const char *str);
2312void RewriteModernObjC::SynthSelGetUidFunctionDecl() {
2313 IdentifierInfo *SelGetUidIdent = &Context->Idents.get("sel_registerName");
2314 SmallVector<QualType, 16> ArgTys;
2315 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2316 QualType getFuncType =
2317 getSimpleFunctionType(Context->getObjCSelType(), ArgTys);
2318 SelGetUidFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2319 SourceLocation(),
2320 SourceLocation(),
2321 SelGetUidIdent, getFuncType,
2322 nullptr, SC_Extern);
2323}
2324
2325void RewriteModernObjC::RewriteFunctionDecl(FunctionDecl *FD) {
2326 // declared in <objc/objc.h>
2327 if (FD->getIdentifier() &&
2328 FD->getName() == "sel_registerName") {
2329 SelGetUidFunctionDecl = FD;
2330 return;
2331 }
2332 RewriteObjCQualifiedInterfaceTypes(FD);
2333}
2334
2335void RewriteModernObjC::RewriteBlockPointerType(std::string& Str, QualType Type) {
2336 std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
2337 const char *argPtr = TypeString.c_str();
2338 if (!strchr(argPtr, '^')) {
2339 Str += TypeString;
2340 return;
2341 }
2342 while (*argPtr) {
2343 Str += (*argPtr == '^' ? '*' : *argPtr);
2344 argPtr++;
2345 }
2346}
2347
2348// FIXME. Consolidate this routine with RewriteBlockPointerType.
2349void RewriteModernObjC::RewriteBlockPointerTypeVariable(std::string& Str,
2350 ValueDecl *VD) {
2351 QualType Type = VD->getType();
2352 std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
2353 const char *argPtr = TypeString.c_str();
2354 int paren = 0;
2355 while (*argPtr) {
2356 switch (*argPtr) {
2357 case '(':
2358 Str += *argPtr;
2359 paren++;
2360 break;
2361 case ')':
2362 Str += *argPtr;
2363 paren--;
2364 break;
2365 case '^':
2366 Str += '*';
2367 if (paren == 1)
2368 Str += VD->getNameAsString();
2369 break;
2370 default:
2371 Str += *argPtr;
2372 break;
2373 }
2374 argPtr++;
2375 }
2376}
2377
2378void RewriteModernObjC::RewriteBlockLiteralFunctionDecl(FunctionDecl *FD) {
2379 SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
2380 const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2381 const FunctionProtoType *proto = dyn_cast<FunctionProtoType>(funcType);
2382 if (!proto)
2383 return;
2384 QualType Type = proto->getReturnType();
2385 std::string FdStr = Type.getAsString(Context->getPrintingPolicy());
2386 FdStr += " ";
2387 FdStr += FD->getName();
2388 FdStr += "(";
2389 unsigned numArgs = proto->getNumParams();
2390 for (unsigned i = 0; i < numArgs; i++) {
2391 QualType ArgType = proto->getParamType(i);
2392 RewriteBlockPointerType(FdStr, ArgType);
2393 if (i+1 < numArgs)
2394 FdStr += ", ";
2395 }
2396 if (FD->isVariadic()) {
2397 FdStr += (numArgs > 0) ? ", ...);\n" : "...);\n";
2398 }
2399 else
2400 FdStr += ");\n";
2401 InsertText(FunLocStart, FdStr);
2402}
2403
2404// SynthSuperConstructorFunctionDecl - id __rw_objc_super(id obj, id super);
2405void RewriteModernObjC::SynthSuperConstructorFunctionDecl() {
2406 if (SuperConstructorFunctionDecl)
2407 return;
2408 IdentifierInfo *msgSendIdent = &Context->Idents.get("__rw_objc_super");
2409 SmallVector<QualType, 16> ArgTys;
2410 QualType argT = Context->getObjCIdType();
2411 assert(!argT.isNull() && "Can't find 'id' type")((!argT.isNull() && "Can't find 'id' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'id' type\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2411, __PRETTY_FUNCTION__))
;
2412 ArgTys.push_back(argT);
2413 ArgTys.push_back(argT);
2414 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2415 ArgTys);
2416 SuperConstructorFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2417 SourceLocation(),
2418 SourceLocation(),
2419 msgSendIdent, msgSendType,
2420 nullptr, SC_Extern);
2421}
2422
2423// SynthMsgSendFunctionDecl - id objc_msgSend(id self, SEL op, ...);
2424void RewriteModernObjC::SynthMsgSendFunctionDecl() {
2425 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend");
2426 SmallVector<QualType, 16> ArgTys;
2427 QualType argT = Context->getObjCIdType();
2428 assert(!argT.isNull() && "Can't find 'id' type")((!argT.isNull() && "Can't find 'id' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'id' type\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2428, __PRETTY_FUNCTION__))
;
2429 ArgTys.push_back(argT);
2430 argT = Context->getObjCSelType();
2431 assert(!argT.isNull() && "Can't find 'SEL' type")((!argT.isNull() && "Can't find 'SEL' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'SEL' type\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2431, __PRETTY_FUNCTION__))
;
2432 ArgTys.push_back(argT);
2433 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2434 ArgTys, /*variadic=*/true);
2435 MsgSendFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2436 SourceLocation(),
2437 SourceLocation(),
2438 msgSendIdent, msgSendType, nullptr,
2439 SC_Extern);
2440}
2441
2442// SynthMsgSendSuperFunctionDecl - id objc_msgSendSuper(void);
2443void RewriteModernObjC::SynthMsgSendSuperFunctionDecl() {
2444 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSendSuper");
2445 SmallVector<QualType, 2> ArgTys;
2446 ArgTys.push_back(Context->VoidTy);
2447 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2448 ArgTys, /*variadic=*/true);
2449 MsgSendSuperFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2450 SourceLocation(),
2451 SourceLocation(),
2452 msgSendIdent, msgSendType,
2453 nullptr, SC_Extern);
2454}
2455
2456// SynthMsgSendStretFunctionDecl - id objc_msgSend_stret(id self, SEL op, ...);
2457void RewriteModernObjC::SynthMsgSendStretFunctionDecl() {
2458 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_stret");
2459 SmallVector<QualType, 16> ArgTys;
2460 QualType argT = Context->getObjCIdType();
2461 assert(!argT.isNull() && "Can't find 'id' type")((!argT.isNull() && "Can't find 'id' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'id' type\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2461, __PRETTY_FUNCTION__))
;
2462 ArgTys.push_back(argT);
2463 argT = Context->getObjCSelType();
2464 assert(!argT.isNull() && "Can't find 'SEL' type")((!argT.isNull() && "Can't find 'SEL' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'SEL' type\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2464, __PRETTY_FUNCTION__))
;
2465 ArgTys.push_back(argT);
2466 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2467 ArgTys, /*variadic=*/true);
2468 MsgSendStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2469 SourceLocation(),
2470 SourceLocation(),
2471 msgSendIdent, msgSendType,
2472 nullptr, SC_Extern);
2473}
2474
2475// SynthMsgSendSuperStretFunctionDecl -
2476// id objc_msgSendSuper_stret(void);
2477void RewriteModernObjC::SynthMsgSendSuperStretFunctionDecl() {
2478 IdentifierInfo *msgSendIdent =
2479 &Context->Idents.get("objc_msgSendSuper_stret");
2480 SmallVector<QualType, 2> ArgTys;
2481 ArgTys.push_back(Context->VoidTy);
2482 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2483 ArgTys, /*variadic=*/true);
2484 MsgSendSuperStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2485 SourceLocation(),
2486 SourceLocation(),
2487 msgSendIdent,
2488 msgSendType, nullptr,
2489 SC_Extern);
2490}
2491
2492// SynthMsgSendFpretFunctionDecl - double objc_msgSend_fpret(id self, SEL op, ...);
2493void RewriteModernObjC::SynthMsgSendFpretFunctionDecl() {
2494 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_fpret");
2495 SmallVector<QualType, 16> ArgTys;
2496 QualType argT = Context->getObjCIdType();
2497 assert(!argT.isNull() && "Can't find 'id' type")((!argT.isNull() && "Can't find 'id' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'id' type\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2497, __PRETTY_FUNCTION__))
;
2498 ArgTys.push_back(argT);
2499 argT = Context->getObjCSelType();
2500 assert(!argT.isNull() && "Can't find 'SEL' type")((!argT.isNull() && "Can't find 'SEL' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'SEL' type\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2500, __PRETTY_FUNCTION__))
;
2501 ArgTys.push_back(argT);
2502 QualType msgSendType = getSimpleFunctionType(Context->DoubleTy,
2503 ArgTys, /*variadic=*/true);
2504 MsgSendFpretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2505 SourceLocation(),
2506 SourceLocation(),
2507 msgSendIdent, msgSendType,
2508 nullptr, SC_Extern);
2509}
2510
2511// SynthGetClassFunctionDecl - Class objc_getClass(const char *name);
2512void RewriteModernObjC::SynthGetClassFunctionDecl() {
2513 IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getClass");
2514 SmallVector<QualType, 16> ArgTys;
2515 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2516 QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
2517 ArgTys);
2518 GetClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2519 SourceLocation(),
2520 SourceLocation(),
2521 getClassIdent, getClassType,
2522 nullptr, SC_Extern);
2523}
2524
2525// SynthGetSuperClassFunctionDecl - Class class_getSuperclass(Class cls);
2526void RewriteModernObjC::SynthGetSuperClassFunctionDecl() {
2527 IdentifierInfo *getSuperClassIdent =
2528 &Context->Idents.get("class_getSuperclass");
2529 SmallVector<QualType, 16> ArgTys;
2530 ArgTys.push_back(Context->getObjCClassType());
2531 QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
2532 ArgTys);
2533 GetSuperClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2534 SourceLocation(),
2535 SourceLocation(),
2536 getSuperClassIdent,
2537 getClassType, nullptr,
2538 SC_Extern);
2539}
2540
2541// SynthGetMetaClassFunctionDecl - Class objc_getMetaClass(const char *name);
2542void RewriteModernObjC::SynthGetMetaClassFunctionDecl() {
2543 IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getMetaClass");
2544 SmallVector<QualType, 16> ArgTys;
2545 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2546 QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
2547 ArgTys);
2548 GetMetaClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2549 SourceLocation(),
2550 SourceLocation(),
2551 getClassIdent, getClassType,
2552 nullptr, SC_Extern);
2553}
2554
2555Stmt *RewriteModernObjC::RewriteObjCStringLiteral(ObjCStringLiteral *Exp) {
2556 assert (Exp != nullptr && "Expected non-null ObjCStringLiteral")((Exp != nullptr && "Expected non-null ObjCStringLiteral"
) ? static_cast<void> (0) : __assert_fail ("Exp != nullptr && \"Expected non-null ObjCStringLiteral\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2556, __PRETTY_FUNCTION__))
;
2557 QualType strType = getConstantStringStructType();
2558
2559 std::string S = "__NSConstantStringImpl_";
2560
2561 std::string tmpName = InFileName;
2562 unsigned i;
2563 for (i=0; i < tmpName.length(); i++) {
2564 char c = tmpName.at(i);
2565 // replace any non-alphanumeric characters with '_'.
2566 if (!isAlphanumeric(c))
2567 tmpName[i] = '_';
2568 }
2569 S += tmpName;
2570 S += "_";
2571 S += utostr(NumObjCStringLiterals++);
2572
2573 Preamble += "static __NSConstantStringImpl " + S;
2574 Preamble += " __attribute__ ((section (\"__DATA, __cfstring\"))) = {__CFConstantStringClassReference,";
2575 Preamble += "0x000007c8,"; // utf8_str
2576 // The pretty printer for StringLiteral handles escape characters properly.
2577 std::string prettyBufS;
2578 llvm::raw_string_ostream prettyBuf(prettyBufS);
2579 Exp->getString()->printPretty(prettyBuf, nullptr, PrintingPolicy(LangOpts));
2580 Preamble += prettyBuf.str();
2581 Preamble += ",";
2582 Preamble += utostr(Exp->getString()->getByteLength()) + "};\n";
2583
2584 VarDecl *NewVD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
2585 SourceLocation(), &Context->Idents.get(S),
2586 strType, nullptr, SC_Static);
2587 DeclRefExpr *DRE = new (Context)
2588 DeclRefExpr(*Context, NewVD, false, strType, VK_LValue, SourceLocation());
2589 Expr *Unop = new (Context)
2590 UnaryOperator(DRE, UO_AddrOf, Context->getPointerType(DRE->getType()),
2591 VK_RValue, OK_Ordinary, SourceLocation(), false);
2592 // cast to NSConstantString *
2593 CastExpr *cast = NoTypeInfoCStyleCastExpr(Context, Exp->getType(),
2594 CK_CPointerToObjCPointerCast, Unop);
2595 ReplaceStmt(Exp, cast);
2596 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2597 return cast;
2598}
2599
2600Stmt *RewriteModernObjC::RewriteObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Exp) {
2601 unsigned IntSize =
2602 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
2603
2604 Expr *FlagExp = IntegerLiteral::Create(*Context,
2605 llvm::APInt(IntSize, Exp->getValue()),
2606 Context->IntTy, Exp->getLocation());
2607 CastExpr *cast = NoTypeInfoCStyleCastExpr(Context, Context->ObjCBuiltinBoolTy,
2608 CK_BitCast, FlagExp);
2609 ParenExpr *PE = new (Context) ParenExpr(Exp->getLocation(), Exp->getExprLoc(),
2610 cast);
2611 ReplaceStmt(Exp, PE);
2612 return PE;
2613}
2614
2615Stmt *RewriteModernObjC::RewriteObjCBoxedExpr(ObjCBoxedExpr *Exp) {
2616 // synthesize declaration of helper functions needed in this routine.
2617 if (!SelGetUidFunctionDecl)
27
Assuming field 'SelGetUidFunctionDecl' is non-null
28
Taking false branch
2618 SynthSelGetUidFunctionDecl();
2619 // use objc_msgSend() for all.
2620 if (!MsgSendFunctionDecl)
29
Assuming field 'MsgSendFunctionDecl' is non-null
30
Taking false branch
2621 SynthMsgSendFunctionDecl();
2622 if (!GetClassFunctionDecl)
31
Assuming field 'GetClassFunctionDecl' is non-null
32
Taking false branch
2623 SynthGetClassFunctionDecl();
2624
2625 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2626 SourceLocation StartLoc = Exp->getBeginLoc();
2627 SourceLocation EndLoc = Exp->getEndLoc();
2628
2629 // Synthesize a call to objc_msgSend().
2630 SmallVector<Expr*, 4> MsgExprs;
2631 SmallVector<Expr*, 4> ClsExprs;
2632
2633 // Create a call to objc_getClass("<BoxingClass>"). It will be the 1st argument.
2634 ObjCMethodDecl *BoxingMethod = Exp->getBoxingMethod();
2635 ObjCInterfaceDecl *BoxingClass = BoxingMethod->getClassInterface();
2636
2637 IdentifierInfo *clsName = BoxingClass->getIdentifier();
2638 ClsExprs.push_back(getStringLiteral(clsName->getName()));
2639 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
2640 StartLoc, EndLoc);
2641 MsgExprs.push_back(Cls);
2642
2643 // Create a call to sel_registerName("<BoxingMethod>:"), etc.
2644 // it will be the 2nd argument.
2645 SmallVector<Expr*, 4> SelExprs;
2646 SelExprs.push_back(
2647 getStringLiteral(BoxingMethod->getSelector().getAsString()));
2648 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2649 SelExprs, StartLoc, EndLoc);
2650 MsgExprs.push_back(SelExp);
2651
2652 // User provided sub-expression is the 3rd, and last, argument.
2653 Expr *subExpr = Exp->getSubExpr();
2654 if (ImplicitCastExpr *ICE
33.1
'ICE' is null
= dyn_cast<ImplicitCastExpr>(subExpr)) {
33
Assuming 'subExpr' is not a 'ImplicitCastExpr'
34
Taking false branch
2655 QualType type = ICE->getType();
2656 const Expr *SubExpr = ICE->IgnoreParenImpCasts();
2657 CastKind CK = CK_BitCast;
2658 if (SubExpr->getType()->isIntegralType(*Context) && type->isBooleanType())
2659 CK = CK_IntegralToBoolean;
2660 subExpr = NoTypeInfoCStyleCastExpr(Context, type, CK, subExpr);
2661 }
2662 MsgExprs.push_back(subExpr);
2663
2664 SmallVector<QualType, 4> ArgTypes;
2665 ArgTypes.push_back(Context->getObjCClassType());
2666 ArgTypes.push_back(Context->getObjCSelType());
2667 for (const auto PI : BoxingMethod->parameters())
35
Assuming '__begin1' is equal to '__end1'
2668 ArgTypes.push_back(PI->getType());
2669
2670 QualType returnType = Exp->getType();
2671 // Get the type, we will need to reference it in a couple spots.
2672 QualType msgSendType = MsgSendFlavor->getType();
2673
2674 // Create a reference to the objc_msgSend() declaration.
2675 DeclRefExpr *DRE = new (Context) DeclRefExpr(
2676 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2677
2678 CastExpr *cast = NoTypeInfoCStyleCastExpr(
2679 Context, Context->getPointerType(Context->VoidTy), CK_BitCast, DRE);
2680
2681 // Now do the "normal" pointer to function cast.
2682 QualType castType =
2683 getSimpleFunctionType(returnType, ArgTypes, BoxingMethod->isVariadic());
2684 castType = Context->getPointerType(castType);
2685 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2686 cast);
2687
2688 // Don't forget the parens to enforce the proper binding.
2689 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2690
2691 const FunctionType *FT = msgSendType->getAs<FunctionType>();
36
Assuming the object is not a 'FunctionType'
37
'FT' initialized to a null pointer value
2692 CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
38
Called C++ object pointer is null
2693 VK_RValue, EndLoc);
2694 ReplaceStmt(Exp, CE);
2695 return CE;
2696}
2697
2698Stmt *RewriteModernObjC::RewriteObjCArrayLiteralExpr(ObjCArrayLiteral *Exp) {
2699 // synthesize declaration of helper functions needed in this routine.
2700 if (!SelGetUidFunctionDecl)
2701 SynthSelGetUidFunctionDecl();
2702 // use objc_msgSend() for all.
2703 if (!MsgSendFunctionDecl)
2704 SynthMsgSendFunctionDecl();
2705 if (!GetClassFunctionDecl)
2706 SynthGetClassFunctionDecl();
2707
2708 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2709 SourceLocation StartLoc = Exp->getBeginLoc();
2710 SourceLocation EndLoc = Exp->getEndLoc();
2711
2712 // Build the expression: __NSContainer_literal(int, ...).arr
2713 QualType IntQT = Context->IntTy;
2714 QualType NSArrayFType =
2715 getSimpleFunctionType(Context->VoidTy, IntQT, true);
2716 std::string NSArrayFName("__NSContainer_literal");
2717 FunctionDecl *NSArrayFD = SynthBlockInitFunctionDecl(NSArrayFName);
2718 DeclRefExpr *NSArrayDRE = new (Context) DeclRefExpr(
2719 *Context, NSArrayFD, false, NSArrayFType, VK_RValue, SourceLocation());
2720
2721 SmallVector<Expr*, 16> InitExprs;
2722 unsigned NumElements = Exp->getNumElements();
2723 unsigned UnsignedIntSize =
2724 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
2725 Expr *count = IntegerLiteral::Create(*Context,
2726 llvm::APInt(UnsignedIntSize, NumElements),
2727 Context->UnsignedIntTy, SourceLocation());
2728 InitExprs.push_back(count);
2729 for (unsigned i = 0; i < NumElements; i++)
2730 InitExprs.push_back(Exp->getElement(i));
2731 Expr *NSArrayCallExpr =
2732 CallExpr::Create(*Context, NSArrayDRE, InitExprs, NSArrayFType, VK_LValue,
2733 SourceLocation());
2734
2735 FieldDecl *ARRFD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
2736 SourceLocation(),
2737 &Context->Idents.get("arr"),
2738 Context->getPointerType(Context->VoidPtrTy),
2739 nullptr, /*BitWidth=*/nullptr,
2740 /*Mutable=*/true, ICIS_NoInit);
2741 MemberExpr *ArrayLiteralME =
2742 MemberExpr::CreateImplicit(*Context, NSArrayCallExpr, false, ARRFD,
2743 ARRFD->getType(), VK_LValue, OK_Ordinary);
2744 QualType ConstIdT = Context->getObjCIdType().withConst();
2745 CStyleCastExpr * ArrayLiteralObjects =
2746 NoTypeInfoCStyleCastExpr(Context,
2747 Context->getPointerType(ConstIdT),
2748 CK_BitCast,
2749 ArrayLiteralME);
2750
2751 // Synthesize a call to objc_msgSend().
2752 SmallVector<Expr*, 32> MsgExprs;
2753 SmallVector<Expr*, 4> ClsExprs;
2754 QualType expType = Exp->getType();
2755
2756 // Create a call to objc_getClass("NSArray"). It will be th 1st argument.
2757 ObjCInterfaceDecl *Class =
2758 expType->getPointeeType()->castAs<ObjCObjectType>()->getInterface();
2759
2760 IdentifierInfo *clsName = Class->getIdentifier();
2761 ClsExprs.push_back(getStringLiteral(clsName->getName()));
2762 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
2763 StartLoc, EndLoc);
2764 MsgExprs.push_back(Cls);
2765
2766 // Create a call to sel_registerName("arrayWithObjects:count:").
2767 // it will be the 2nd argument.
2768 SmallVector<Expr*, 4> SelExprs;
2769 ObjCMethodDecl *ArrayMethod = Exp->getArrayWithObjectsMethod();
2770 SelExprs.push_back(
2771 getStringLiteral(ArrayMethod->getSelector().getAsString()));
2772 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2773 SelExprs, StartLoc, EndLoc);
2774 MsgExprs.push_back(SelExp);
2775
2776 // (const id [])objects
2777 MsgExprs.push_back(ArrayLiteralObjects);
2778
2779 // (NSUInteger)cnt
2780 Expr *cnt = IntegerLiteral::Create(*Context,
2781 llvm::APInt(UnsignedIntSize, NumElements),
2782 Context->UnsignedIntTy, SourceLocation());
2783 MsgExprs.push_back(cnt);
2784
2785 SmallVector<QualType, 4> ArgTypes;
2786 ArgTypes.push_back(Context->getObjCClassType());
2787 ArgTypes.push_back(Context->getObjCSelType());
2788 for (const auto *PI : ArrayMethod->parameters())
2789 ArgTypes.push_back(PI->getType());
2790
2791 QualType returnType = Exp->getType();
2792 // Get the type, we will need to reference it in a couple spots.
2793 QualType msgSendType = MsgSendFlavor->getType();
2794
2795 // Create a reference to the objc_msgSend() declaration.
2796 DeclRefExpr *DRE = new (Context) DeclRefExpr(
2797 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2798
2799 CastExpr *cast = NoTypeInfoCStyleCastExpr(
2800 Context, Context->getPointerType(Context->VoidTy), CK_BitCast, DRE);
2801
2802 // Now do the "normal" pointer to function cast.
2803 QualType castType =
2804 getSimpleFunctionType(returnType, ArgTypes, ArrayMethod->isVariadic());
2805 castType = Context->getPointerType(castType);
2806 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2807 cast);
2808
2809 // Don't forget the parens to enforce the proper binding.
2810 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2811
2812 const FunctionType *FT = msgSendType->castAs<FunctionType>();
2813 CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
2814 VK_RValue, EndLoc);
2815 ReplaceStmt(Exp, CE);
2816 return CE;
2817}
2818
2819Stmt *RewriteModernObjC::RewriteObjCDictionaryLiteralExpr(ObjCDictionaryLiteral *Exp) {
2820 // synthesize declaration of helper functions needed in this routine.
2821 if (!SelGetUidFunctionDecl)
2822 SynthSelGetUidFunctionDecl();
2823 // use objc_msgSend() for all.
2824 if (!MsgSendFunctionDecl)
2825 SynthMsgSendFunctionDecl();
2826 if (!GetClassFunctionDecl)
2827 SynthGetClassFunctionDecl();
2828
2829 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2830 SourceLocation StartLoc = Exp->getBeginLoc();
2831 SourceLocation EndLoc = Exp->getEndLoc();
2832
2833 // Build the expression: __NSContainer_literal(int, ...).arr
2834 QualType IntQT = Context->IntTy;
2835 QualType NSDictFType =
2836 getSimpleFunctionType(Context->VoidTy, IntQT, true);
2837 std::string NSDictFName("__NSContainer_literal");
2838 FunctionDecl *NSDictFD = SynthBlockInitFunctionDecl(NSDictFName);
2839 DeclRefExpr *NSDictDRE = new (Context) DeclRefExpr(
2840 *Context, NSDictFD, false, NSDictFType, VK_RValue, SourceLocation());
2841
2842 SmallVector<Expr*, 16> KeyExprs;
2843 SmallVector<Expr*, 16> ValueExprs;
2844
2845 unsigned NumElements = Exp->getNumElements();
2846 unsigned UnsignedIntSize =
2847 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
2848 Expr *count = IntegerLiteral::Create(*Context,
2849 llvm::APInt(UnsignedIntSize, NumElements),
2850 Context->UnsignedIntTy, SourceLocation());
2851 KeyExprs.push_back(count);
2852 ValueExprs.push_back(count);
2853 for (unsigned i = 0; i < NumElements; i++) {
2854 ObjCDictionaryElement Element = Exp->getKeyValueElement(i);
2855 KeyExprs.push_back(Element.Key);
2856 ValueExprs.push_back(Element.Value);
2857 }
2858
2859 // (const id [])objects
2860 Expr *NSValueCallExpr =
2861 CallExpr::Create(*Context, NSDictDRE, ValueExprs, NSDictFType, VK_LValue,
2862 SourceLocation());
2863
2864 FieldDecl *ARRFD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
2865 SourceLocation(),
2866 &Context->Idents.get("arr"),
2867 Context->getPointerType(Context->VoidPtrTy),
2868 nullptr, /*BitWidth=*/nullptr,
2869 /*Mutable=*/true, ICIS_NoInit);
2870 MemberExpr *DictLiteralValueME =
2871 MemberExpr::CreateImplicit(*Context, NSValueCallExpr, false, ARRFD,
2872 ARRFD->getType(), VK_LValue, OK_Ordinary);
2873 QualType ConstIdT = Context->getObjCIdType().withConst();
2874 CStyleCastExpr * DictValueObjects =
2875 NoTypeInfoCStyleCastExpr(Context,
2876 Context->getPointerType(ConstIdT),
2877 CK_BitCast,
2878 DictLiteralValueME);
2879 // (const id <NSCopying> [])keys
2880 Expr *NSKeyCallExpr = CallExpr::Create(
2881 *Context, NSDictDRE, KeyExprs, NSDictFType, VK_LValue, SourceLocation());
2882
2883 MemberExpr *DictLiteralKeyME =
2884 MemberExpr::CreateImplicit(*Context, NSKeyCallExpr, false, ARRFD,
2885 ARRFD->getType(), VK_LValue, OK_Ordinary);
2886
2887 CStyleCastExpr * DictKeyObjects =
2888 NoTypeInfoCStyleCastExpr(Context,
2889 Context->getPointerType(ConstIdT),
2890 CK_BitCast,
2891 DictLiteralKeyME);
2892
2893 // Synthesize a call to objc_msgSend().
2894 SmallVector<Expr*, 32> MsgExprs;
2895 SmallVector<Expr*, 4> ClsExprs;
2896 QualType expType = Exp->getType();
2897
2898 // Create a call to objc_getClass("NSArray"). It will be th 1st argument.
2899 ObjCInterfaceDecl *Class =
2900 expType->getPointeeType()->castAs<ObjCObjectType>()->getInterface();
2901
2902 IdentifierInfo *clsName = Class->getIdentifier();
2903 ClsExprs.push_back(getStringLiteral(clsName->getName()));
2904 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
2905 StartLoc, EndLoc);
2906 MsgExprs.push_back(Cls);
2907
2908 // Create a call to sel_registerName("arrayWithObjects:count:").
2909 // it will be the 2nd argument.
2910 SmallVector<Expr*, 4> SelExprs;
2911 ObjCMethodDecl *DictMethod = Exp->getDictWithObjectsMethod();
2912 SelExprs.push_back(getStringLiteral(DictMethod->getSelector().getAsString()));
2913 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2914 SelExprs, StartLoc, EndLoc);
2915 MsgExprs.push_back(SelExp);
2916
2917 // (const id [])objects
2918 MsgExprs.push_back(DictValueObjects);
2919
2920 // (const id <NSCopying> [])keys
2921 MsgExprs.push_back(DictKeyObjects);
2922
2923 // (NSUInteger)cnt
2924 Expr *cnt = IntegerLiteral::Create(*Context,
2925 llvm::APInt(UnsignedIntSize, NumElements),
2926 Context->UnsignedIntTy, SourceLocation());
2927 MsgExprs.push_back(cnt);
2928
2929 SmallVector<QualType, 8> ArgTypes;
2930 ArgTypes.push_back(Context->getObjCClassType());
2931 ArgTypes.push_back(Context->getObjCSelType());
2932 for (const auto *PI : DictMethod->parameters()) {
2933 QualType T = PI->getType();
2934 if (const PointerType* PT = T->getAs<PointerType>()) {
2935 QualType PointeeTy = PT->getPointeeType();
2936 convertToUnqualifiedObjCType(PointeeTy);
2937 T = Context->getPointerType(PointeeTy);
2938 }
2939 ArgTypes.push_back(T);
2940 }
2941
2942 QualType returnType = Exp->getType();
2943 // Get the type, we will need to reference it in a couple spots.
2944 QualType msgSendType = MsgSendFlavor->getType();
2945
2946 // Create a reference to the objc_msgSend() declaration.
2947 DeclRefExpr *DRE = new (Context) DeclRefExpr(
2948 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2949
2950 CastExpr *cast = NoTypeInfoCStyleCastExpr(
2951 Context, Context->getPointerType(Context->VoidTy), CK_BitCast, DRE);
2952
2953 // Now do the "normal" pointer to function cast.
2954 QualType castType =
2955 getSimpleFunctionType(returnType, ArgTypes, DictMethod->isVariadic());
2956 castType = Context->getPointerType(castType);
2957 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2958 cast);
2959
2960 // Don't forget the parens to enforce the proper binding.
2961 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2962
2963 const FunctionType *FT = msgSendType->castAs<FunctionType>();
2964 CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
2965 VK_RValue, EndLoc);
2966 ReplaceStmt(Exp, CE);
2967 return CE;
2968}
2969
2970// struct __rw_objc_super {
2971// struct objc_object *object; struct objc_object *superClass;
2972// };
2973QualType RewriteModernObjC::getSuperStructType() {
2974 if (!SuperStructDecl) {
2975 SuperStructDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
2976 SourceLocation(), SourceLocation(),
2977 &Context->Idents.get("__rw_objc_super"));
2978 QualType FieldTypes[2];
2979
2980 // struct objc_object *object;
2981 FieldTypes[0] = Context->getObjCIdType();
2982 // struct objc_object *superClass;
2983 FieldTypes[1] = Context->getObjCIdType();
2984
2985 // Create fields
2986 for (unsigned i = 0; i < 2; ++i) {
2987 SuperStructDecl->addDecl(FieldDecl::Create(*Context, SuperStructDecl,
2988 SourceLocation(),
2989 SourceLocation(), nullptr,
2990 FieldTypes[i], nullptr,
2991 /*BitWidth=*/nullptr,
2992 /*Mutable=*/false,
2993 ICIS_NoInit));
2994 }
2995
2996 SuperStructDecl->completeDefinition();
2997 }
2998 return Context->getTagDeclType(SuperStructDecl);
2999}
3000
3001QualType RewriteModernObjC::getConstantStringStructType() {
3002 if (!ConstantStringDecl) {
3003 ConstantStringDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
3004 SourceLocation(), SourceLocation(),
3005 &Context->Idents.get("__NSConstantStringImpl"));
3006 QualType FieldTypes[4];
3007
3008 // struct objc_object *receiver;
3009 FieldTypes[0] = Context->getObjCIdType();
3010 // int flags;
3011 FieldTypes[1] = Context->IntTy;
3012 // char *str;
3013 FieldTypes[2] = Context->getPointerType(Context->CharTy);
3014 // long length;
3015 FieldTypes[3] = Context->LongTy;
3016
3017 // Create fields
3018 for (unsigned i = 0; i < 4; ++i) {
3019 ConstantStringDecl->addDecl(FieldDecl::Create(*Context,
3020 ConstantStringDecl,
3021 SourceLocation(),
3022 SourceLocation(), nullptr,
3023 FieldTypes[i], nullptr,
3024 /*BitWidth=*/nullptr,
3025 /*Mutable=*/true,
3026 ICIS_NoInit));
3027 }
3028
3029 ConstantStringDecl->completeDefinition();
3030 }
3031 return Context->getTagDeclType(ConstantStringDecl);
3032}
3033
3034/// getFunctionSourceLocation - returns start location of a function
3035/// definition. Complication arises when function has declared as
3036/// extern "C" or extern "C" {...}
3037static SourceLocation getFunctionSourceLocation (RewriteModernObjC &R,
3038 FunctionDecl *FD) {
3039 if (FD->isExternC() && !FD->isMain()) {
3040 const DeclContext *DC = FD->getDeclContext();
3041 if (const LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(DC))
3042 // if it is extern "C" {...}, return function decl's own location.
3043 if (!LSD->getRBraceLoc().isValid())
3044 return LSD->getExternLoc();
3045 }
3046 if (FD->getStorageClass() != SC_None)
3047 R.RewriteBlockLiteralFunctionDecl(FD);
3048 return FD->getTypeSpecStartLoc();
3049}
3050
3051void RewriteModernObjC::RewriteLineDirective(const Decl *D) {
3052
3053 SourceLocation Location = D->getLocation();
3054
3055 if (Location.isFileID() && GenerateLineInfo) {
3056 std::string LineString("\n#line ");
3057 PresumedLoc PLoc = SM->getPresumedLoc(Location);
3058 LineString += utostr(PLoc.getLine());
3059 LineString += " \"";
3060 LineString += Lexer::Stringify(PLoc.getFilename());
3061 if (isa<ObjCMethodDecl>(D))
3062 LineString += "\"";
3063 else LineString += "\"\n";
3064
3065 Location = D->getBeginLoc();
3066 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
3067 if (FD->isExternC() && !FD->isMain()) {
3068 const DeclContext *DC = FD->getDeclContext();
3069 if (const LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(DC))
3070 // if it is extern "C" {...}, return function decl's own location.
3071 if (!LSD->getRBraceLoc().isValid())
3072 Location = LSD->getExternLoc();
3073 }
3074 }
3075 InsertText(Location, LineString);
3076 }
3077}
3078
3079/// SynthMsgSendStretCallExpr - This routine translates message expression
3080/// into a call to objc_msgSend_stret() entry point. Tricky part is that
3081/// nil check on receiver must be performed before calling objc_msgSend_stret.
3082/// MsgSendStretFlavor - function declaration objc_msgSend_stret(...)
3083/// msgSendType - function type of objc_msgSend_stret(...)
3084/// returnType - Result type of the method being synthesized.
3085/// ArgTypes - type of the arguments passed to objc_msgSend_stret, starting with receiver type.
3086/// MsgExprs - list of argument expressions being passed to objc_msgSend_stret,
3087/// starting with receiver.
3088/// Method - Method being rewritten.
3089Expr *RewriteModernObjC::SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
3090 QualType returnType,
3091 SmallVectorImpl<QualType> &ArgTypes,
3092 SmallVectorImpl<Expr*> &MsgExprs,
3093 ObjCMethodDecl *Method) {
3094 // Now do the "normal" pointer to function cast.
3095 QualType FuncType = getSimpleFunctionType(
3096 returnType, ArgTypes, Method ? Method->isVariadic() : false);
3097 QualType castType = Context->getPointerType(FuncType);
3098
3099 // build type for containing the objc_msgSend_stret object.
3100 static unsigned stretCount=0;
3101 std::string name = "__Stret"; name += utostr(stretCount);
3102 std::string str =
3103 "extern \"C\" void * __cdecl memset(void *_Dst, int _Val, size_t _Size);\n";
3104 str += "namespace {\n";
3105 str += "struct "; str += name;
3106 str += " {\n\t";
3107 str += name;
3108 str += "(id receiver, SEL sel";
3109 for (unsigned i = 2; i < ArgTypes.size(); i++) {
3110 std::string ArgName = "arg"; ArgName += utostr(i);
3111 ArgTypes[i].getAsStringInternal(ArgName, Context->getPrintingPolicy());
3112 str += ", "; str += ArgName;
3113 }
3114 // could be vararg.
3115 for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); i++) {
3116 std::string ArgName = "arg"; ArgName += utostr(i);
3117 MsgExprs[i]->getType().getAsStringInternal(ArgName,
3118 Context->getPrintingPolicy());
3119 str += ", "; str += ArgName;
3120 }
3121
3122 str += ") {\n";
3123 str += "\t unsigned size = sizeof(";
3124 str += returnType.getAsString(Context->getPrintingPolicy()); str += ");\n";
3125
3126 str += "\t if (size == 1 || size == 2 || size == 4 || size == 8)\n";
3127
3128 str += "\t s = (("; str += castType.getAsString(Context->getPrintingPolicy());
3129 str += ")(void *)objc_msgSend)(receiver, sel";
3130 for (unsigned i = 2; i < ArgTypes.size(); i++) {
3131 str += ", arg"; str += utostr(i);
3132 }
3133 // could be vararg.
3134 for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); i++) {
3135 str += ", arg"; str += utostr(i);
3136 }
3137 str+= ");\n";
3138
3139 str += "\t else if (receiver == 0)\n";
3140 str += "\t memset((void*)&s, 0, sizeof(s));\n";
3141 str += "\t else\n";
3142
3143 str += "\t s = (("; str += castType.getAsString(Context->getPrintingPolicy());
3144 str += ")(void *)objc_msgSend_stret)(receiver, sel";
3145 for (unsigned i = 2; i < ArgTypes.size(); i++) {
3146 str += ", arg"; str += utostr(i);
3147 }
3148 // could be vararg.
3149 for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); i++) {
3150 str += ", arg"; str += utostr(i);
3151 }
3152 str += ");\n";
3153
3154 str += "\t}\n";
3155 str += "\t"; str += returnType.getAsString(Context->getPrintingPolicy());
3156 str += " s;\n";
3157 str += "};\n};\n\n";
3158 SourceLocation FunLocStart;
3159 if (CurFunctionDef)
3160 FunLocStart = getFunctionSourceLocation(*this, CurFunctionDef);
3161 else {
3162 assert(CurMethodDef && "SynthMsgSendStretCallExpr - CurMethodDef is null")((CurMethodDef && "SynthMsgSendStretCallExpr - CurMethodDef is null"
) ? static_cast<void> (0) : __assert_fail ("CurMethodDef && \"SynthMsgSendStretCallExpr - CurMethodDef is null\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3162, __PRETTY_FUNCTION__))
;
3163 FunLocStart = CurMethodDef->getBeginLoc();
3164 }
3165
3166 InsertText(FunLocStart, str);
3167 ++stretCount;
3168
3169 // AST for __Stretn(receiver, args).s;
3170 IdentifierInfo *ID = &Context->Idents.get(name);
3171 FunctionDecl *FD =
3172 FunctionDecl::Create(*Context, TUDecl, SourceLocation(), SourceLocation(),
3173 ID, FuncType, nullptr, SC_Extern, false, false);
3174 DeclRefExpr *DRE = new (Context)
3175 DeclRefExpr(*Context, FD, false, castType, VK_RValue, SourceLocation());
3176 CallExpr *STCE = CallExpr::Create(*Context, DRE, MsgExprs, castType,
3177 VK_LValue, SourceLocation());
3178
3179 FieldDecl *FieldD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
3180 SourceLocation(),
3181 &Context->Idents.get("s"),
3182 returnType, nullptr,
3183 /*BitWidth=*/nullptr,
3184 /*Mutable=*/true, ICIS_NoInit);
3185 MemberExpr *ME = MemberExpr::CreateImplicit(
3186 *Context, STCE, false, FieldD, FieldD->getType(), VK_LValue, OK_Ordinary);
3187
3188 return ME;
3189}
3190
3191Stmt *RewriteModernObjC::SynthMessageExpr(ObjCMessageExpr *Exp,
3192 SourceLocation StartLoc,
3193 SourceLocation EndLoc) {
3194 if (!SelGetUidFunctionDecl)
3195 SynthSelGetUidFunctionDecl();
3196 if (!MsgSendFunctionDecl)
3197 SynthMsgSendFunctionDecl();
3198 if (!MsgSendSuperFunctionDecl)
3199 SynthMsgSendSuperFunctionDecl();
3200 if (!MsgSendStretFunctionDecl)
3201 SynthMsgSendStretFunctionDecl();
3202 if (!MsgSendSuperStretFunctionDecl)
3203 SynthMsgSendSuperStretFunctionDecl();
3204 if (!MsgSendFpretFunctionDecl)
3205 SynthMsgSendFpretFunctionDecl();
3206 if (!GetClassFunctionDecl)
3207 SynthGetClassFunctionDecl();
3208 if (!GetSuperClassFunctionDecl)
3209 SynthGetSuperClassFunctionDecl();
3210 if (!GetMetaClassFunctionDecl)
3211 SynthGetMetaClassFunctionDecl();
3212
3213 // default to objc_msgSend().
3214 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
3215 // May need to use objc_msgSend_stret() as well.
3216 FunctionDecl *MsgSendStretFlavor = nullptr;
3217 if (ObjCMethodDecl *mDecl = Exp->getMethodDecl()) {
3218 QualType resultType = mDecl->getReturnType();
3219 if (resultType->isRecordType())
3220 MsgSendStretFlavor = MsgSendStretFunctionDecl;
3221 else if (resultType->isRealFloatingType())
3222 MsgSendFlavor = MsgSendFpretFunctionDecl;
3223 }
3224
3225 // Synthesize a call to objc_msgSend().
3226 SmallVector<Expr*, 8> MsgExprs;
3227 switch (Exp->getReceiverKind()) {
3228 case ObjCMessageExpr::SuperClass: {
3229 MsgSendFlavor = MsgSendSuperFunctionDecl;
3230 if (MsgSendStretFlavor)
3231 MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
3232 assert(MsgSendFlavor && "MsgSendFlavor is NULL!")((MsgSendFlavor && "MsgSendFlavor is NULL!") ? static_cast
<void> (0) : __assert_fail ("MsgSendFlavor && \"MsgSendFlavor is NULL!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3232, __PRETTY_FUNCTION__))
;
3233
3234 ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
3235
3236 SmallVector<Expr*, 4> InitExprs;
3237
3238 // set the receiver to self, the first argument to all methods.
3239 InitExprs.push_back(
3240 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3241 CK_BitCast,
3242 new (Context) DeclRefExpr(*Context,
3243 CurMethodDef->getSelfDecl(),
3244 false,
3245 Context->getObjCIdType(),
3246 VK_RValue,
3247 SourceLocation()))
3248 ); // set the 'receiver'.
3249
3250 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3251 SmallVector<Expr*, 8> ClsExprs;
3252 ClsExprs.push_back(getStringLiteral(ClassDecl->getIdentifier()->getName()));
3253 // (Class)objc_getClass("CurrentClass")
3254 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetMetaClassFunctionDecl,
3255 ClsExprs, StartLoc, EndLoc);
3256 ClsExprs.clear();
3257 ClsExprs.push_back(Cls);
3258 Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl, ClsExprs,
3259 StartLoc, EndLoc);
3260
3261 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3262 // To turn off a warning, type-cast to 'id'
3263 InitExprs.push_back( // set 'super class', using class_getSuperclass().
3264 NoTypeInfoCStyleCastExpr(Context,
3265 Context->getObjCIdType(),
3266 CK_BitCast, Cls));
3267 // struct __rw_objc_super
3268 QualType superType = getSuperStructType();
3269 Expr *SuperRep;
3270
3271 if (LangOpts.MicrosoftExt) {
3272 SynthSuperConstructorFunctionDecl();
3273 // Simulate a constructor call...
3274 DeclRefExpr *DRE = new (Context)
3275 DeclRefExpr(*Context, SuperConstructorFunctionDecl, false, superType,
3276 VK_LValue, SourceLocation());
3277 SuperRep = CallExpr::Create(*Context, DRE, InitExprs, superType,
3278 VK_LValue, SourceLocation());
3279 // The code for super is a little tricky to prevent collision with
3280 // the structure definition in the header. The rewriter has it's own
3281 // internal definition (__rw_objc_super) that is uses. This is why
3282 // we need the cast below. For example:
3283 // (struct __rw_objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
3284 //
3285 SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
3286 Context->getPointerType(SuperRep->getType()),
3287 VK_RValue, OK_Ordinary,
3288 SourceLocation(), false);
3289 SuperRep = NoTypeInfoCStyleCastExpr(Context,
3290 Context->getPointerType(superType),
3291 CK_BitCast, SuperRep);
3292 } else {
3293 // (struct __rw_objc_super) { <exprs from above> }
3294 InitListExpr *ILE =
3295 new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
3296 SourceLocation());
3297 TypeSourceInfo *superTInfo
3298 = Context->getTrivialTypeSourceInfo(superType);
3299 SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
3300 superType, VK_LValue,
3301 ILE, false);
3302 // struct __rw_objc_super *
3303 SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
3304 Context->getPointerType(SuperRep->getType()),
3305 VK_RValue, OK_Ordinary,
3306 SourceLocation(), false);
3307 }
3308 MsgExprs.push_back(SuperRep);
3309 break;
3310 }
3311
3312 case ObjCMessageExpr::Class: {
3313 SmallVector<Expr*, 8> ClsExprs;
3314 ObjCInterfaceDecl *Class
3315 = Exp->getClassReceiver()->castAs<ObjCObjectType>()->getInterface();
3316 IdentifierInfo *clsName = Class->getIdentifier();
3317 ClsExprs.push_back(getStringLiteral(clsName->getName()));
3318 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
3319 StartLoc, EndLoc);
3320 CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
3321 Context->getObjCIdType(),
3322 CK_BitCast, Cls);
3323 MsgExprs.push_back(ArgExpr);
3324 break;
3325 }
3326
3327 case ObjCMessageExpr::SuperInstance:{
3328 MsgSendFlavor = MsgSendSuperFunctionDecl;
3329 if (MsgSendStretFlavor)
3330 MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
3331 assert(MsgSendFlavor && "MsgSendFlavor is NULL!")((MsgSendFlavor && "MsgSendFlavor is NULL!") ? static_cast
<void> (0) : __assert_fail ("MsgSendFlavor && \"MsgSendFlavor is NULL!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3331, __PRETTY_FUNCTION__))
;
3332 ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
3333 SmallVector<Expr*, 4> InitExprs;
3334
3335 InitExprs.push_back(
3336 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3337 CK_BitCast,
3338 new (Context) DeclRefExpr(*Context,
3339 CurMethodDef->getSelfDecl(),
3340 false,
3341 Context->getObjCIdType(),
3342 VK_RValue, SourceLocation()))
3343 ); // set the 'receiver'.
3344
3345 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3346 SmallVector<Expr*, 8> ClsExprs;
3347 ClsExprs.push_back(getStringLiteral(ClassDecl->getIdentifier()->getName()));
3348 // (Class)objc_getClass("CurrentClass")
3349 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
3350 StartLoc, EndLoc);
3351 ClsExprs.clear();
3352 ClsExprs.push_back(Cls);
3353 Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl, ClsExprs,
3354 StartLoc, EndLoc);
3355
3356 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3357 // To turn off a warning, type-cast to 'id'
3358 InitExprs.push_back(
3359 // set 'super class', using class_getSuperclass().
3360 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3361 CK_BitCast, Cls));
3362 // struct __rw_objc_super
3363 QualType superType = getSuperStructType();
3364 Expr *SuperRep;
3365
3366 if (LangOpts.MicrosoftExt) {
3367 SynthSuperConstructorFunctionDecl();
3368 // Simulate a constructor call...
3369 DeclRefExpr *DRE = new (Context)
3370 DeclRefExpr(*Context, SuperConstructorFunctionDecl, false, superType,
3371 VK_LValue, SourceLocation());
3372 SuperRep = CallExpr::Create(*Context, DRE, InitExprs, superType,
3373 VK_LValue, SourceLocation());
3374 // The code for super is a little tricky to prevent collision with
3375 // the structure definition in the header. The rewriter has it's own
3376 // internal definition (__rw_objc_super) that is uses. This is why
3377 // we need the cast below. For example:
3378 // (struct __rw_objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
3379 //
3380 SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
3381 Context->getPointerType(SuperRep->getType()),
3382 VK_RValue, OK_Ordinary,
3383 SourceLocation(), false);
3384 SuperRep = NoTypeInfoCStyleCastExpr(Context,
3385 Context->getPointerType(superType),
3386 CK_BitCast, SuperRep);
3387 } else {
3388 // (struct __rw_objc_super) { <exprs from above> }
3389 InitListExpr *ILE =
3390 new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
3391 SourceLocation());
3392 TypeSourceInfo *superTInfo
3393 = Context->getTrivialTypeSourceInfo(superType);
3394 SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
3395 superType, VK_RValue, ILE,
3396 false);
3397 }
3398 MsgExprs.push_back(SuperRep);
3399 break;
3400 }
3401
3402 case ObjCMessageExpr::Instance: {
3403 // Remove all type-casts because it may contain objc-style types; e.g.
3404 // Foo<Proto> *.
3405 Expr *recExpr = Exp->getInstanceReceiver();
3406 while (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(recExpr))
3407 recExpr = CE->getSubExpr();
3408 CastKind CK = recExpr->getType()->isObjCObjectPointerType()
3409 ? CK_BitCast : recExpr->getType()->isBlockPointerType()
3410 ? CK_BlockPointerToObjCPointerCast
3411 : CK_CPointerToObjCPointerCast;
3412
3413 recExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3414 CK, recExpr);
3415 MsgExprs.push_back(recExpr);
3416 break;
3417 }
3418 }
3419
3420 // Create a call to sel_registerName("selName"), it will be the 2nd argument.
3421 SmallVector<Expr*, 8> SelExprs;
3422 SelExprs.push_back(getStringLiteral(Exp->getSelector().getAsString()));
3423 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
3424 SelExprs, StartLoc, EndLoc);
3425 MsgExprs.push_back(SelExp);
3426
3427 // Now push any user supplied arguments.
3428 for (unsigned i = 0; i < Exp->getNumArgs(); i++) {
3429 Expr *userExpr = Exp->getArg(i);
3430 // Make all implicit casts explicit...ICE comes in handy:-)
3431 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(userExpr)) {
3432 // Reuse the ICE type, it is exactly what the doctor ordered.
3433 QualType type = ICE->getType();
3434 if (needToScanForQualifiers(type))
3435 type = Context->getObjCIdType();
3436 // Make sure we convert "type (^)(...)" to "type (*)(...)".
3437 (void)convertBlockPointerToFunctionPointer(type);
3438 const Expr *SubExpr = ICE->IgnoreParenImpCasts();
3439 CastKind CK;
3440 if (SubExpr->getType()->isIntegralType(*Context) &&
3441 type->isBooleanType()) {
3442 CK = CK_IntegralToBoolean;
3443 } else if (type->isObjCObjectPointerType()) {
3444 if (SubExpr->getType()->isBlockPointerType()) {
3445 CK = CK_BlockPointerToObjCPointerCast;
3446 } else if (SubExpr->getType()->isPointerType()) {
3447 CK = CK_CPointerToObjCPointerCast;
3448 } else {
3449 CK = CK_BitCast;
3450 }
3451 } else {
3452 CK = CK_BitCast;
3453 }
3454
3455 userExpr = NoTypeInfoCStyleCastExpr(Context, type, CK, userExpr);
3456 }
3457 // Make id<P...> cast into an 'id' cast.
3458 else if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(userExpr)) {
3459 if (CE->getType()->isObjCQualifiedIdType()) {
3460 while ((CE = dyn_cast<CStyleCastExpr>(userExpr)))
3461 userExpr = CE->getSubExpr();
3462 CastKind CK;
3463 if (userExpr->getType()->isIntegralType(*Context)) {
3464 CK = CK_IntegralToPointer;
3465 } else if (userExpr->getType()->isBlockPointerType()) {
3466 CK = CK_BlockPointerToObjCPointerCast;
3467 } else if (userExpr->getType()->isPointerType()) {
3468 CK = CK_CPointerToObjCPointerCast;
3469 } else {
3470 CK = CK_BitCast;
3471 }
3472 userExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3473 CK, userExpr);
3474 }
3475 }
3476 MsgExprs.push_back(userExpr);
3477 // We've transferred the ownership to MsgExprs. For now, we *don't* null
3478 // out the argument in the original expression (since we aren't deleting
3479 // the ObjCMessageExpr). See RewritePropertyOrImplicitSetter() usage for more info.
3480 //Exp->setArg(i, 0);
3481 }
3482 // Generate the funky cast.
3483 CastExpr *cast;
3484 SmallVector<QualType, 8> ArgTypes;
3485 QualType returnType;
3486
3487 // Push 'id' and 'SEL', the 2 implicit arguments.
3488 if (MsgSendFlavor == MsgSendSuperFunctionDecl)
3489 ArgTypes.push_back(Context->getPointerType(getSuperStructType()));
3490 else
3491 ArgTypes.push_back(Context->getObjCIdType());
3492 ArgTypes.push_back(Context->getObjCSelType());
3493 if (ObjCMethodDecl *OMD = Exp->getMethodDecl()) {
3494 // Push any user argument types.
3495 for (const auto *PI : OMD->parameters()) {
3496 QualType t = PI->getType()->isObjCQualifiedIdType()
3497 ? Context->getObjCIdType()
3498 : PI->getType();
3499 // Make sure we convert "t (^)(...)" to "t (*)(...)".
3500 (void)convertBlockPointerToFunctionPointer(t);
3501 ArgTypes.push_back(t);
3502 }
3503 returnType = Exp->getType();
3504 convertToUnqualifiedObjCType(returnType);
3505 (void)convertBlockPointerToFunctionPointer(returnType);
3506 } else {
3507 returnType = Context->getObjCIdType();
3508 }
3509 // Get the type, we will need to reference it in a couple spots.
3510 QualType msgSendType = MsgSendFlavor->getType();
3511
3512 // Create a reference to the objc_msgSend() declaration.
3513 DeclRefExpr *DRE = new (Context) DeclRefExpr(
3514 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
3515
3516 // Need to cast objc_msgSend to "void *" (to workaround a GCC bandaid).
3517 // If we don't do this cast, we get the following bizarre warning/note:
3518 // xx.m:13: warning: function called through a non-compatible type
3519 // xx.m:13: note: if this code is reached, the program will abort
3520 cast = NoTypeInfoCStyleCastExpr(Context,
3521 Context->getPointerType(Context->VoidTy),
3522 CK_BitCast, DRE);
3523
3524 // Now do the "normal" pointer to function cast.
3525 // If we don't have a method decl, force a variadic cast.
3526 const ObjCMethodDecl *MD = Exp->getMethodDecl();
3527 QualType castType =
3528 getSimpleFunctionType(returnType, ArgTypes, MD ? MD->isVariadic() : true);
3529 castType = Context->getPointerType(castType);
3530 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
3531 cast);
3532
3533 // Don't forget the parens to enforce the proper binding.
3534 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
3535
3536 const FunctionType *FT = msgSendType->castAs<FunctionType>();
3537 CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
3538 VK_RValue, EndLoc);
3539 Stmt *ReplacingStmt = CE;
3540 if (MsgSendStretFlavor) {
3541 // We have the method which returns a struct/union. Must also generate
3542 // call to objc_msgSend_stret and hang both varieties on a conditional
3543 // expression which dictate which one to envoke depending on size of
3544 // method's return type.
3545
3546 Expr *STCE = SynthMsgSendStretCallExpr(MsgSendStretFlavor,
3547 returnType,
3548 ArgTypes, MsgExprs,
3549 Exp->getMethodDecl());
3550 ReplacingStmt = STCE;
3551 }
3552 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3553 return ReplacingStmt;
3554}
3555
3556Stmt *RewriteModernObjC::RewriteMessageExpr(ObjCMessageExpr *Exp) {
3557 Stmt *ReplacingStmt =
3558 SynthMessageExpr(Exp, Exp->getBeginLoc(), Exp->getEndLoc());
3559
3560 // Now do the actual rewrite.
3561 ReplaceStmt(Exp, ReplacingStmt);
3562
3563 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3564 return ReplacingStmt;
3565}
3566
3567// typedef struct objc_object Protocol;
3568QualType RewriteModernObjC::getProtocolType() {
3569 if (!ProtocolTypeDecl) {
3570 TypeSourceInfo *TInfo
3571 = Context->getTrivialTypeSourceInfo(Context->getObjCIdType());
3572 ProtocolTypeDecl = TypedefDecl::Create(*Context, TUDecl,
3573 SourceLocation(), SourceLocation(),
3574 &Context->Idents.get("Protocol"),
3575 TInfo);
3576 }
3577 return Context->getTypeDeclType(ProtocolTypeDecl);
3578}
3579
3580/// RewriteObjCProtocolExpr - Rewrite a protocol expression into
3581/// a synthesized/forward data reference (to the protocol's metadata).
3582/// The forward references (and metadata) are generated in
3583/// RewriteModernObjC::HandleTranslationUnit().
3584Stmt *RewriteModernObjC::RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp) {
3585 std::string Name = "_OBJC_PROTOCOL_REFERENCE_$_" +
3586 Exp->getProtocol()->getNameAsString();
3587 IdentifierInfo *ID = &Context->Idents.get(Name);
3588 VarDecl *VD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
3589 SourceLocation(), ID, getProtocolType(),
3590 nullptr, SC_Extern);
3591 DeclRefExpr *DRE = new (Context) DeclRefExpr(
3592 *Context, VD, false, getProtocolType(), VK_LValue, SourceLocation());
3593 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(
3594 Context, Context->getPointerType(DRE->getType()), CK_BitCast, DRE);
3595 ReplaceStmt(Exp, castExpr);
3596 ProtocolExprDecls.insert(Exp->getProtocol()->getCanonicalDecl());
3597 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3598 return castExpr;
3599}
3600
3601/// IsTagDefinedInsideClass - This routine checks that a named tagged type
3602/// is defined inside an objective-c class. If so, it returns true.
3603bool RewriteModernObjC::IsTagDefinedInsideClass(ObjCContainerDecl *IDecl,
3604 TagDecl *Tag,
3605 bool &IsNamedDefinition) {
3606 if (!IDecl)
3607 return false;
3608 SourceLocation TagLocation;
3609 if (RecordDecl *RD = dyn_cast<RecordDecl>(Tag)) {
3610 RD = RD->getDefinition();
3611 if (!RD || !RD->getDeclName().getAsIdentifierInfo())
3612 return false;
3613 IsNamedDefinition = true;
3614 TagLocation = RD->getLocation();
3615 return Context->getSourceManager().isBeforeInTranslationUnit(
3616 IDecl->getLocation(), TagLocation);
3617 }
3618 if (EnumDecl *ED = dyn_cast<EnumDecl>(Tag)) {
3619 if (!ED || !ED->getDeclName().getAsIdentifierInfo())
3620 return false;
3621 IsNamedDefinition = true;
3622 TagLocation = ED->getLocation();
3623 return Context->getSourceManager().isBeforeInTranslationUnit(
3624 IDecl->getLocation(), TagLocation);
3625 }
3626 return false;
3627}
3628
3629/// RewriteObjCFieldDeclType - This routine rewrites a type into the buffer.
3630/// It handles elaborated types, as well as enum types in the process.
3631bool RewriteModernObjC::RewriteObjCFieldDeclType(QualType &Type,
3632 std::string &Result) {
3633 if (isa<TypedefType>(Type)) {
3634 Result += "\t";
3635 return false;
3636 }
3637
3638 if (Type->isArrayType()) {
3639 QualType ElemTy = Context->getBaseElementType(Type);
3640 return RewriteObjCFieldDeclType(ElemTy, Result);
3641 }
3642 else if (Type->isRecordType()) {
3643 RecordDecl *RD = Type->castAs<RecordType>()->getDecl();
3644 if (RD->isCompleteDefinition()) {
3645 if (RD->isStruct())
3646 Result += "\n\tstruct ";
3647 else if (RD->isUnion())
3648 Result += "\n\tunion ";
3649 else
3650 assert(false && "class not allowed as an ivar type")((false && "class not allowed as an ivar type") ? static_cast
<void> (0) : __assert_fail ("false && \"class not allowed as an ivar type\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3650, __PRETTY_FUNCTION__))
;
3651
3652 Result += RD->getName();
3653 if (GlobalDefinedTags.count(RD)) {
3654 // struct/union is defined globally, use it.
3655 Result += " ";
3656 return true;
3657 }
3658 Result += " {\n";
3659 for (auto *FD : RD->fields())
3660 RewriteObjCFieldDecl(FD, Result);
3661 Result += "\t} ";
3662 return true;
3663 }
3664 }
3665 else if (Type->isEnumeralType()) {
3666 EnumDecl *ED = Type->castAs<EnumType>()->getDecl();
3667 if (ED->isCompleteDefinition()) {
3668 Result += "\n\tenum ";
3669 Result += ED->getName();
3670 if (GlobalDefinedTags.count(ED)) {
3671 // Enum is globall defined, use it.
3672 Result += " ";
3673 return true;
3674 }
3675
3676 Result += " {\n";
3677 for (const auto *EC : ED->enumerators()) {
3678 Result += "\t"; Result += EC->getName(); Result += " = ";
3679 llvm::APSInt Val = EC->getInitVal();
3680 Result += Val.toString(10);
3681 Result += ",\n";
3682 }
3683 Result += "\t} ";
3684 return true;
3685 }
3686 }
3687
3688 Result += "\t";
3689 convertObjCTypeToCStyleType(Type);
3690 return false;
3691}
3692
3693
3694/// RewriteObjCFieldDecl - This routine rewrites a field into the buffer.
3695/// It handles elaborated types, as well as enum types in the process.
3696void RewriteModernObjC::RewriteObjCFieldDecl(FieldDecl *fieldDecl,
3697 std::string &Result) {
3698 QualType Type = fieldDecl->getType();
3699 std::string Name = fieldDecl->getNameAsString();
3700
3701 bool EleboratedType = RewriteObjCFieldDeclType(Type, Result);
3702 if (!EleboratedType)
3703 Type.getAsStringInternal(Name, Context->getPrintingPolicy());
3704 Result += Name;
3705 if (fieldDecl->isBitField()) {
3706 Result += " : "; Result += utostr(fieldDecl->getBitWidthValue(*Context));
3707 }
3708 else if (EleboratedType && Type->isArrayType()) {
3709 const ArrayType *AT = Context->getAsArrayType(Type);
3710 do {
3711 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) {
3712 Result += "[";
3713 llvm::APInt Dim = CAT->getSize();
3714 Result += utostr(Dim.getZExtValue());
3715 Result += "]";
3716 }
3717 AT = Context->getAsArrayType(AT->getElementType());
3718 } while (AT);
3719 }
3720
3721 Result += ";\n";
3722}
3723
3724/// RewriteLocallyDefinedNamedAggregates - This routine rewrites locally defined
3725/// named aggregate types into the input buffer.
3726void RewriteModernObjC::RewriteLocallyDefinedNamedAggregates(FieldDecl *fieldDecl,
3727 std::string &Result) {
3728 QualType Type = fieldDecl->getType();
3729 if (isa<TypedefType>(Type))
3730 return;
3731 if (Type->isArrayType())
3732 Type = Context->getBaseElementType(Type);
3733
3734 auto *IDecl = dyn_cast<ObjCContainerDecl>(fieldDecl->getDeclContext());
3735
3736 TagDecl *TD = nullptr;
3737 if (Type->isRecordType()) {
3738 TD = Type->castAs<RecordType>()->getDecl();
3739 }
3740 else if (Type->isEnumeralType()) {
3741 TD = Type->castAs<EnumType>()->getDecl();
3742 }
3743
3744 if (TD) {
3745 if (GlobalDefinedTags.count(TD))
3746 return;
3747
3748 bool IsNamedDefinition = false;
3749 if (IsTagDefinedInsideClass(IDecl, TD, IsNamedDefinition)) {
3750 RewriteObjCFieldDeclType(Type, Result);
3751 Result += ";";
3752 }
3753 if (IsNamedDefinition)
3754 GlobalDefinedTags.insert(TD);
3755 }
3756}
3757
3758unsigned RewriteModernObjC::ObjCIvarBitfieldGroupNo(ObjCIvarDecl *IV) {
3759 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3760 if (ObjCInterefaceHasBitfieldGroups.count(CDecl)) {
3761 return IvarGroupNumber[IV];
3762 }
3763 unsigned GroupNo = 0;
3764 SmallVector<const ObjCIvarDecl *, 8> IVars;
3765 for (const ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3766 IVD; IVD = IVD->getNextIvar())
3767 IVars.push_back(IVD);
3768
3769 for (unsigned i = 0, e = IVars.size(); i < e; i++)
3770 if (IVars[i]->isBitField()) {
3771 IvarGroupNumber[IVars[i++]] = ++GroupNo;
3772 while (i < e && IVars[i]->isBitField())
3773 IvarGroupNumber[IVars[i++]] = GroupNo;
3774 if (i < e)
3775 --i;
3776 }
3777
3778 ObjCInterefaceHasBitfieldGroups.insert(CDecl);
3779 return IvarGroupNumber[IV];
3780}
3781
3782QualType RewriteModernObjC::SynthesizeBitfieldGroupStructType(
3783 ObjCIvarDecl *IV,
3784 SmallVectorImpl<ObjCIvarDecl *> &IVars) {
3785 std::string StructTagName;
3786 ObjCIvarBitfieldGroupType(IV, StructTagName);
3787 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct,
3788 Context->getTranslationUnitDecl(),
3789 SourceLocation(), SourceLocation(),
3790 &Context->Idents.get(StructTagName));
3791 for (unsigned i=0, e = IVars.size(); i < e; i++) {
3792 ObjCIvarDecl *Ivar = IVars[i];
3793 RD->addDecl(FieldDecl::Create(*Context, RD, SourceLocation(), SourceLocation(),
3794 &Context->Idents.get(Ivar->getName()),
3795 Ivar->getType(),
3796 nullptr, /*Expr *BW */Ivar->getBitWidth(),
3797 false, ICIS_NoInit));
3798 }
3799 RD->completeDefinition();
3800 return Context->getTagDeclType(RD);
3801}
3802
3803QualType RewriteModernObjC::GetGroupRecordTypeForObjCIvarBitfield(ObjCIvarDecl *IV) {
3804 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3805 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3806 std::pair<const ObjCInterfaceDecl*, unsigned> tuple = std::make_pair(CDecl, GroupNo);
3807 if (GroupRecordType.count(tuple))
3808 return GroupRecordType[tuple];
3809
3810 SmallVector<ObjCIvarDecl *, 8> IVars;
3811 for (const ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3812 IVD; IVD = IVD->getNextIvar()) {
3813 if (IVD->isBitField())
3814 IVars.push_back(const_cast<ObjCIvarDecl *>(IVD));
3815 else {
3816 if (!IVars.empty()) {
3817 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IVars[0]);
3818 // Generate the struct type for this group of bitfield ivars.
3819 GroupRecordType[std::make_pair(CDecl, GroupNo)] =
3820 SynthesizeBitfieldGroupStructType(IVars[0], IVars);
3821 IVars.clear();
3822 }
3823 }
3824 }
3825 if (!IVars.empty()) {
3826 // Do the last one.
3827 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IVars[0]);
3828 GroupRecordType[std::make_pair(CDecl, GroupNo)] =
3829 SynthesizeBitfieldGroupStructType(IVars[0], IVars);
3830 }
3831 QualType RetQT = GroupRecordType[tuple];
3832 assert(!RetQT.isNull() && "GetGroupRecordTypeForObjCIvarBitfield struct type is NULL")((!RetQT.isNull() && "GetGroupRecordTypeForObjCIvarBitfield struct type is NULL"
) ? static_cast<void> (0) : __assert_fail ("!RetQT.isNull() && \"GetGroupRecordTypeForObjCIvarBitfield struct type is NULL\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3832, __PRETTY_FUNCTION__))
;
3833
3834 return RetQT;
3835}
3836
3837/// ObjCIvarBitfieldGroupDecl - Names field decl. for ivar bitfield group.
3838/// Name would be: classname__GRBF_n where n is the group number for this ivar.
3839void RewriteModernObjC::ObjCIvarBitfieldGroupDecl(ObjCIvarDecl *IV,
3840 std::string &Result) {
3841 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3842 Result += CDecl->getName();
3843 Result += "__GRBF_";
3844 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3845 Result += utostr(GroupNo);
3846}
3847
3848/// ObjCIvarBitfieldGroupType - Names struct type for ivar bitfield group.
3849/// Name of the struct would be: classname__T_n where n is the group number for
3850/// this ivar.
3851void RewriteModernObjC::ObjCIvarBitfieldGroupType(ObjCIvarDecl *IV,
3852 std::string &Result) {
3853 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3854 Result += CDecl->getName();
3855 Result += "__T_";
3856 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3857 Result += utostr(GroupNo);
3858}
3859
3860/// ObjCIvarBitfieldGroupOffset - Names symbol for ivar bitfield group field offset.
3861/// Name would be: OBJC_IVAR_$_classname__GRBF_n where n is the group number for
3862/// this ivar.
3863void RewriteModernObjC::ObjCIvarBitfieldGroupOffset(ObjCIvarDecl *IV,
3864 std::string &Result) {
3865 Result += "OBJC_IVAR_$_";
3866 ObjCIvarBitfieldGroupDecl(IV, Result);
3867}
3868
3869#define SKIP_BITFIELDS(IX, ENDIX, VEC){ while ((IX < ENDIX) && VEC[IX]->isBitField())
++IX; if (IX < ENDIX) --IX; }
{ \
3870 while ((IX < ENDIX) && VEC[IX]->isBitField()) \
3871 ++IX; \
3872 if (IX < ENDIX) \
3873 --IX; \
3874}
3875
3876/// RewriteObjCInternalStruct - Rewrite one internal struct corresponding to
3877/// an objective-c class with ivars.
3878void RewriteModernObjC::RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
3879 std::string &Result) {
3880 assert(CDecl && "Class missing in SynthesizeObjCInternalStruct")((CDecl && "Class missing in SynthesizeObjCInternalStruct"
) ? static_cast<void> (0) : __assert_fail ("CDecl && \"Class missing in SynthesizeObjCInternalStruct\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3880, __PRETTY_FUNCTION__))
;
3881 assert(CDecl->getName() != "" &&((CDecl->getName() != "" && "Name missing in SynthesizeObjCInternalStruct"
) ? static_cast<void> (0) : __assert_fail ("CDecl->getName() != \"\" && \"Name missing in SynthesizeObjCInternalStruct\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3882, __PRETTY_FUNCTION__))
3882 "Name missing in SynthesizeObjCInternalStruct")((CDecl->getName() != "" && "Name missing in SynthesizeObjCInternalStruct"
) ? static_cast<void> (0) : __assert_fail ("CDecl->getName() != \"\" && \"Name missing in SynthesizeObjCInternalStruct\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3882, __PRETTY_FUNCTION__))
;
3883 ObjCInterfaceDecl *RCDecl = CDecl->getSuperClass();
3884 SmallVector<ObjCIvarDecl *, 8> IVars;
3885 for (ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3886 IVD; IVD = IVD->getNextIvar())
3887 IVars.push_back(IVD);
3888
3889 SourceLocation LocStart = CDecl->getBeginLoc();
3890 SourceLocation LocEnd = CDecl->getEndOfDefinitionLoc();
3891
3892 const char *startBuf = SM->getCharacterData(LocStart);
3893 const char *endBuf = SM->getCharacterData(LocEnd);
3894
3895 // If no ivars and no root or if its root, directly or indirectly,
3896 // have no ivars (thus not synthesized) then no need to synthesize this class.
3897 if ((!CDecl->isThisDeclarationADefinition() || IVars.size() == 0) &&
3898 (!RCDecl || !ObjCSynthesizedStructs.count(RCDecl))) {
3899 endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
3900 ReplaceText(LocStart, endBuf-startBuf, Result);
3901 return;
3902 }
3903
3904 // Insert named struct/union definitions inside class to
3905 // outer scope. This follows semantics of locally defined
3906 // struct/unions in objective-c classes.
3907 for (unsigned i = 0, e = IVars.size(); i < e; i++)
3908 RewriteLocallyDefinedNamedAggregates(IVars[i], Result);
3909
3910 // Insert named structs which are syntheized to group ivar bitfields
3911 // to outer scope as well.
3912 for (unsigned i = 0, e = IVars.size(); i < e; i++)
3913 if (IVars[i]->isBitField()) {
3914 ObjCIvarDecl *IV = IVars[i];
3915 QualType QT = GetGroupRecordTypeForObjCIvarBitfield(IV);
3916 RewriteObjCFieldDeclType(QT, Result);
3917 Result += ";";
3918 // skip over ivar bitfields in this group.
3919 SKIP_BITFIELDS(i , e, IVars){ while ((i < e) && IVars[i]->isBitField()) ++i
; if (i < e) --i; }
;
3920 }
3921
3922 Result += "\nstruct ";
3923 Result += CDecl->getNameAsString();
3924 Result += "_IMPL {\n";
3925
3926 if (RCDecl && ObjCSynthesizedStructs.count(RCDecl)) {
3927 Result += "\tstruct "; Result += RCDecl->getNameAsString();
3928 Result += "_IMPL "; Result += RCDecl->getNameAsString();
3929 Result += "_IVARS;\n";
3930 }
3931
3932 for (unsigned i = 0, e = IVars.size(); i < e; i++) {
3933 if (IVars[i]->isBitField()) {
3934 ObjCIvarDecl *IV = IVars[i];
3935 Result += "\tstruct ";
3936 ObjCIvarBitfieldGroupType(IV, Result); Result += " ";
3937 ObjCIvarBitfieldGroupDecl(IV, Result); Result += ";\n";
3938 // skip over ivar bitfields in this group.
3939 SKIP_BITFIELDS(i , e, IVars){ while ((i < e) && IVars[i]->isBitField()) ++i
; if (i < e) --i; }
;
3940 }
3941 else
3942 RewriteObjCFieldDecl(IVars[i], Result);
3943 }
3944
3945 Result += "};\n";
3946 endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
3947 ReplaceText(LocStart, endBuf-startBuf, Result);
3948 // Mark this struct as having been generated.
3949 if (!ObjCSynthesizedStructs.insert(CDecl).second)
3950 llvm_unreachable("struct already synthesize- RewriteObjCInternalStruct")::llvm::llvm_unreachable_internal("struct already synthesize- RewriteObjCInternalStruct"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3950)
;
3951}
3952
3953/// RewriteIvarOffsetSymbols - Rewrite ivar offset symbols of those ivars which
3954/// have been referenced in an ivar access expression.
3955void RewriteModernObjC::RewriteIvarOffsetSymbols(ObjCInterfaceDecl *CDecl,
3956 std::string &Result) {
3957 // write out ivar offset symbols which have been referenced in an ivar
3958 // access expression.
3959 llvm::SmallSetVector<ObjCIvarDecl *, 8> Ivars = ReferencedIvars[CDecl];
3960
3961 if (Ivars.empty())
3962 return;
3963
3964 llvm::DenseSet<std::pair<const ObjCInterfaceDecl*, unsigned> > GroupSymbolOutput;
3965 for (ObjCIvarDecl *IvarDecl : Ivars) {
3966 const ObjCInterfaceDecl *IDecl = IvarDecl->getContainingInterface();
3967 unsigned GroupNo = 0;
3968 if (IvarDecl->isBitField()) {
3969 GroupNo = ObjCIvarBitfieldGroupNo(IvarDecl);
3970 if (GroupSymbolOutput.count(std::make_pair(IDecl, GroupNo)))
3971 continue;
3972 }
3973 Result += "\n";
3974 if (LangOpts.MicrosoftExt)
3975 Result += "__declspec(allocate(\".objc_ivar$B\")) ";
3976 Result += "extern \"C\" ";
3977 if (LangOpts.MicrosoftExt &&
3978 IvarDecl->getAccessControl() != ObjCIvarDecl::Private &&
3979 IvarDecl->getAccessControl() != ObjCIvarDecl::Package)
3980 Result += "__declspec(dllimport) ";
3981
3982 Result += "unsigned long ";
3983 if (IvarDecl->isBitField()) {
3984 ObjCIvarBitfieldGroupOffset(IvarDecl, Result);
3985 GroupSymbolOutput.insert(std::make_pair(IDecl, GroupNo));
3986 }
3987 else
3988 WriteInternalIvarName(CDecl, IvarDecl, Result);
3989 Result += ";";
3990 }
3991}
3992
3993//===----------------------------------------------------------------------===//
3994// Meta Data Emission
3995//===----------------------------------------------------------------------===//
3996
3997/// RewriteImplementations - This routine rewrites all method implementations
3998/// and emits meta-data.
3999
4000void RewriteModernObjC::RewriteImplementations() {
4001 int ClsDefCount = ClassImplementation.size();
4002 int CatDefCount = CategoryImplementation.size();
4003
4004 // Rewrite implemented methods
4005 for (int i = 0; i < ClsDefCount; i++) {
4006 ObjCImplementationDecl *OIMP = ClassImplementation[i];
4007 ObjCInterfaceDecl *CDecl = OIMP->getClassInterface();
4008 if (CDecl->isImplicitInterfaceDecl())
4009 assert(false &&((false && "Legacy implicit interface rewriting not supported in moder abi"
) ? static_cast<void> (0) : __assert_fail ("false && \"Legacy implicit interface rewriting not supported in moder abi\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4010, __PRETTY_FUNCTION__))
4010 "Legacy implicit interface rewriting not supported in moder abi")((false && "Legacy implicit interface rewriting not supported in moder abi"
) ? static_cast<void> (0) : __assert_fail ("false && \"Legacy implicit interface rewriting not supported in moder abi\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4010, __PRETTY_FUNCTION__))
;
4011 RewriteImplementationDecl(OIMP);
4012 }
4013
4014 for (int i = 0; i < CatDefCount; i++) {
4015 ObjCCategoryImplDecl *CIMP = CategoryImplementation[i];
4016 ObjCInterfaceDecl *CDecl = CIMP->getClassInterface();
4017 if (CDecl->isImplicitInterfaceDecl())
4018 assert(false &&((false && "Legacy implicit interface rewriting not supported in moder abi"
) ? static_cast<void> (0) : __assert_fail ("false && \"Legacy implicit interface rewriting not supported in moder abi\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4019, __PRETTY_FUNCTION__))
4019 "Legacy implicit interface rewriting not supported in moder abi")((false && "Legacy implicit interface rewriting not supported in moder abi"
) ? static_cast<void> (0) : __assert_fail ("false && \"Legacy implicit interface rewriting not supported in moder abi\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4019, __PRETTY_FUNCTION__))
;
4020 RewriteImplementationDecl(CIMP);
4021 }
4022}
4023
4024void RewriteModernObjC::RewriteByRefString(std::string &ResultStr,
4025 const std::string &Name,
4026 ValueDecl *VD, bool def) {
4027 assert(BlockByRefDeclNo.count(VD) &&((BlockByRefDeclNo.count(VD) && "RewriteByRefString: ByRef decl missing"
) ? static_cast<void> (0) : __assert_fail ("BlockByRefDeclNo.count(VD) && \"RewriteByRefString: ByRef decl missing\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4028, __PRETTY_FUNCTION__))
4028 "RewriteByRefString: ByRef decl missing")((BlockByRefDeclNo.count(VD) && "RewriteByRefString: ByRef decl missing"
) ? static_cast<void> (0) : __assert_fail ("BlockByRefDeclNo.count(VD) && \"RewriteByRefString: ByRef decl missing\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4028, __PRETTY_FUNCTION__))
;
4029 if (def)
4030 ResultStr += "struct ";
4031 ResultStr += "__Block_byref_" + Name +
4032 "_" + utostr(BlockByRefDeclNo[VD]) ;
4033}
4034
4035static bool HasLocalVariableExternalStorage(ValueDecl *VD) {
4036 if (VarDecl *Var = dyn_cast<VarDecl>(VD))
4037 return (Var->isFunctionOrMethodVarDecl() && !Var->hasLocalStorage());
4038 return false;
4039}
4040
4041std::string RewriteModernObjC::SynthesizeBlockFunc(BlockExpr *CE, int i,
4042 StringRef funcName,
4043 std::string Tag) {
4044 const FunctionType *AFT = CE->getFunctionType();
4045 QualType RT = AFT->getReturnType();
4046 std::string StructRef = "struct " + Tag;
4047 SourceLocation BlockLoc = CE->getExprLoc();
4048 std::string S;
4049 ConvertSourceLocationToLineDirective(BlockLoc, S);
4050
4051 S += "static " + RT.getAsString(Context->getPrintingPolicy()) + " __" +
4052 funcName.str() + "_block_func_" + utostr(i);
4053
4054 BlockDecl *BD = CE->getBlockDecl();
4055
4056 if (isa<FunctionNoProtoType>(AFT)) {
4057 // No user-supplied arguments. Still need to pass in a pointer to the
4058 // block (to reference imported block decl refs).
4059 S += "(" + StructRef + " *__cself)";
4060 } else if (BD->param_empty()) {
4061 S += "(" + StructRef + " *__cself)";
4062 } else {
4063 const FunctionProtoType *FT = cast<FunctionProtoType>(AFT);
4064 assert(FT && "SynthesizeBlockFunc: No function proto")((FT && "SynthesizeBlockFunc: No function proto") ? static_cast
<void> (0) : __assert_fail ("FT && \"SynthesizeBlockFunc: No function proto\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4064, __PRETTY_FUNCTION__))
;
4065 S += '(';
4066 // first add the implicit argument.
4067 S += StructRef + " *__cself, ";
4068 std::string ParamStr;
4069 for (BlockDecl::param_iterator AI = BD->param_begin(),
4070 E = BD->param_end(); AI != E; ++AI) {
4071 if (AI != BD->param_begin()) S += ", ";
4072 ParamStr = (*AI)->getNameAsString();
4073 QualType QT = (*AI)->getType();
4074 (void)convertBlockPointerToFunctionPointer(QT);
4075 QT.getAsStringInternal(ParamStr, Context->getPrintingPolicy());
4076 S += ParamStr;
4077 }
4078 if (FT->isVariadic()) {
4079 if (!BD->param_empty()) S += ", ";
4080 S += "...";
4081 }
4082 S += ')';
4083 }
4084 S += " {\n";
4085
4086 // Create local declarations to avoid rewriting all closure decl ref exprs.
4087 // First, emit a declaration for all "by ref" decls.
4088 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4089 E = BlockByRefDecls.end(); I != E; ++I) {
4090 S += " ";
4091 std::string Name = (*I)->getNameAsString();
4092 std::string TypeString;
4093 RewriteByRefString(TypeString, Name, (*I));
4094 TypeString += " *";
4095 Name = TypeString + Name;
4096 S += Name + " = __cself->" + (*I)->getNameAsString() + "; // bound by ref\n";
4097 }
4098 // Next, emit a declaration for all "by copy" declarations.
4099 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4100 E = BlockByCopyDecls.end(); I != E; ++I) {
4101 S += " ";
4102 // Handle nested closure invocation. For example:
4103 //
4104 // void (^myImportedClosure)(void);
4105 // myImportedClosure = ^(void) { setGlobalInt(x + y); };
4106 //
4107 // void (^anotherClosure)(void);
4108 // anotherClosure = ^(void) {
4109 // myImportedClosure(); // import and invoke the closure
4110 // };
4111 //
4112 if (isTopLevelBlockPointerType((*I)->getType())) {
4113 RewriteBlockPointerTypeVariable(S, (*I));
4114 S += " = (";
4115 RewriteBlockPointerType(S, (*I)->getType());
4116 S += ")";
4117 S += "__cself->" + (*I)->getNameAsString() + "; // bound by copy\n";
4118 }
4119 else {
4120 std::string Name = (*I)->getNameAsString();
4121 QualType QT = (*I)->getType();
4122 if (HasLocalVariableExternalStorage(*I))
4123 QT = Context->getPointerType(QT);
4124 QT.getAsStringInternal(Name, Context->getPrintingPolicy());
4125 S += Name + " = __cself->" +
4126 (*I)->getNameAsString() + "; // bound by copy\n";
4127 }
4128 }
4129 std::string RewrittenStr = RewrittenBlockExprs[CE];
4130 const char *cstr = RewrittenStr.c_str();
4131 while (*cstr++ != '{') ;
4132 S += cstr;
4133 S += "\n";
4134 return S;
4135}
4136
4137std::string RewriteModernObjC::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
4138 StringRef funcName,
4139 std::string Tag) {
4140 std::string StructRef = "struct " + Tag;
4141 std::string S = "static void __";
4142
4143 S += funcName;
4144 S += "_block_copy_" + utostr(i);
4145 S += "(" + StructRef;
4146 S += "*dst, " + StructRef;
4147 S += "*src) {";
4148 for (ValueDecl *VD : ImportedBlockDecls) {
4149 S += "_Block_object_assign((void*)&dst->";
4150 S += VD->getNameAsString();
4151 S += ", (void*)src->";
4152 S += VD->getNameAsString();
4153 if (BlockByRefDeclsPtrSet.count(VD))
4154 S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
4155 else if (VD->getType()->isBlockPointerType())
4156 S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
4157 else
4158 S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
4159 }
4160 S += "}\n";
4161
4162 S += "\nstatic void __";
4163 S += funcName;
4164 S += "_block_dispose_" + utostr(i);
4165 S += "(" + StructRef;
4166 S += "*src) {";
4167 for (ValueDecl *VD : ImportedBlockDecls) {
4168 S += "_Block_object_dispose((void*)src->";
4169 S += VD->getNameAsString();
4170 if (BlockByRefDeclsPtrSet.count(VD))
4171 S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
4172 else if (VD->getType()->isBlockPointerType())
4173 S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
4174 else
4175 S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
4176 }
4177 S += "}\n";
4178 return S;
4179}
4180
4181std::string RewriteModernObjC::SynthesizeBlockImpl(BlockExpr *CE, std::string Tag,
4182 std::string Desc) {
4183 std::string S = "\nstruct " + Tag;
4184 std::string Constructor = " " + Tag;
4185
4186 S += " {\n struct __block_impl impl;\n";
4187 S += " struct " + Desc;
4188 S += "* Desc;\n";
4189
4190 Constructor += "(void *fp, "; // Invoke function pointer.
4191 Constructor += "struct " + Desc; // Descriptor pointer.
4192 Constructor += " *desc";
4193
4194 if (BlockDeclRefs.size()) {
4195 // Output all "by copy" declarations.
4196 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4197 E = BlockByCopyDecls.end(); I != E; ++I) {
4198 S += " ";
4199 std::string FieldName = (*I)->getNameAsString();
4200 std::string ArgName = "_" + FieldName;
4201 // Handle nested closure invocation. For example:
4202 //
4203 // void (^myImportedBlock)(void);
4204 // myImportedBlock = ^(void) { setGlobalInt(x + y); };
4205 //
4206 // void (^anotherBlock)(void);
4207 // anotherBlock = ^(void) {
4208 // myImportedBlock(); // import and invoke the closure
4209 // };
4210 //
4211 if (isTopLevelBlockPointerType((*I)->getType())) {
4212 S += "struct __block_impl *";
4213 Constructor += ", void *" + ArgName;
4214 } else {
4215 QualType QT = (*I)->getType();
4216 if (HasLocalVariableExternalStorage(*I))
4217 QT = Context->getPointerType(QT);
4218 QT.getAsStringInternal(FieldName, Context->getPrintingPolicy());
4219 QT.getAsStringInternal(ArgName, Context->getPrintingPolicy());
4220 Constructor += ", " + ArgName;
4221 }
4222 S += FieldName + ";\n";
4223 }
4224 // Output all "by ref" declarations.
4225 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4226 E = BlockByRefDecls.end(); I != E; ++I) {
4227 S += " ";
4228 std::string FieldName = (*I)->getNameAsString();
4229 std::string ArgName = "_" + FieldName;
4230 {
4231 std::string TypeString;
4232 RewriteByRefString(TypeString, FieldName, (*I));
4233 TypeString += " *";
4234 FieldName = TypeString + FieldName;
4235 ArgName = TypeString + ArgName;
4236 Constructor += ", " + ArgName;
4237 }
4238 S += FieldName + "; // by ref\n";
4239 }
4240 // Finish writing the constructor.
4241 Constructor += ", int flags=0)";
4242 // Initialize all "by copy" arguments.
4243 bool firsTime = true;
4244 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4245 E = BlockByCopyDecls.end(); I != E; ++I) {
4246 std::string Name = (*I)->getNameAsString();
4247 if (firsTime) {
4248 Constructor += " : ";
4249 firsTime = false;
4250 }
4251 else
4252 Constructor += ", ";
4253 if (isTopLevelBlockPointerType((*I)->getType()))
4254 Constructor += Name + "((struct __block_impl *)_" + Name + ")";
4255 else
4256 Constructor += Name + "(_" + Name + ")";
4257 }
4258 // Initialize all "by ref" arguments.
4259 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4260 E = BlockByRefDecls.end(); I != E; ++I) {
4261 std::string Name = (*I)->getNameAsString();
4262 if (firsTime) {
4263 Constructor += " : ";
4264 firsTime = false;
4265 }
4266 else
4267 Constructor += ", ";
4268 Constructor += Name + "(_" + Name + "->__forwarding)";
4269 }
4270
4271 Constructor += " {\n";
4272 if (GlobalVarDecl)
4273 Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
4274 else
4275 Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
4276 Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
4277
4278 Constructor += " Desc = desc;\n";
4279 } else {
4280 // Finish writing the constructor.
4281 Constructor += ", int flags=0) {\n";
4282 if (GlobalVarDecl)
4283 Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
4284 else
4285 Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
4286 Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
4287 Constructor += " Desc = desc;\n";
4288 }
4289 Constructor += " ";
4290 Constructor += "}\n";
4291 S += Constructor;
4292 S += "};\n";
4293 return S;
4294}
4295
4296std::string RewriteModernObjC::SynthesizeBlockDescriptor(std::string DescTag,
4297 std::string ImplTag, int i,
4298 StringRef FunName,
4299 unsigned hasCopy) {
4300 std::string S = "\nstatic struct " + DescTag;
4301
4302 S += " {\n size_t reserved;\n";
4303 S += " size_t Block_size;\n";
4304 if (hasCopy) {
4305 S += " void (*copy)(struct ";
4306 S += ImplTag; S += "*, struct ";
4307 S += ImplTag; S += "*);\n";
4308
4309 S += " void (*dispose)(struct ";
4310 S += ImplTag; S += "*);\n";
4311 }
4312 S += "} ";
4313
4314 S += DescTag + "_DATA = { 0, sizeof(struct ";
4315 S += ImplTag + ")";
4316 if (hasCopy) {
4317 S += ", __" + FunName.str() + "_block_copy_" + utostr(i);
4318 S += ", __" + FunName.str() + "_block_dispose_" + utostr(i);
4319 }
4320 S += "};\n";
4321 return S;
4322}
4323
4324void RewriteModernObjC::SynthesizeBlockLiterals(SourceLocation FunLocStart,
4325 StringRef FunName) {
4326 bool RewriteSC = (GlobalVarDecl &&
4327 !Blocks.empty() &&
4328 GlobalVarDecl->getStorageClass() == SC_Static &&
4329 GlobalVarDecl->getType().getCVRQualifiers());
4330 if (RewriteSC) {
4331 std::string SC(" void __");
4332 SC += GlobalVarDecl->getNameAsString();
4333 SC += "() {}";
4334 InsertText(FunLocStart, SC);
4335 }
4336
4337 // Insert closures that were part of the function.
4338 for (unsigned i = 0, count=0; i < Blocks.size(); i++) {
4339 CollectBlockDeclRefInfo(Blocks[i]);
4340 // Need to copy-in the inner copied-in variables not actually used in this
4341 // block.
4342 for (int j = 0; j < InnerDeclRefsCount[i]; j++) {
4343 DeclRefExpr *Exp = InnerDeclRefs[count++];
4344 ValueDecl *VD = Exp->getDecl();
4345 BlockDeclRefs.push_back(Exp);
4346 if (!VD->hasAttr<BlocksAttr>()) {
4347 if (!BlockByCopyDeclsPtrSet.count(VD)) {
4348 BlockByCopyDeclsPtrSet.insert(VD);
4349 BlockByCopyDecls.push_back(VD);
4350 }
4351 continue;
4352 }
4353
4354 if (!BlockByRefDeclsPtrSet.count(VD)) {
4355 BlockByRefDeclsPtrSet.insert(VD);
4356 BlockByRefDecls.push_back(VD);
4357 }
4358
4359 // imported objects in the inner blocks not used in the outer
4360 // blocks must be copied/disposed in the outer block as well.
4361 if (VD->getType()->isObjCObjectPointerType() ||
4362 VD->getType()->isBlockPointerType())
4363 ImportedBlockDecls.insert(VD);
4364 }
4365
4366 std::string ImplTag = "__" + FunName.str() + "_block_impl_" + utostr(i);
4367 std::string DescTag = "__" + FunName.str() + "_block_desc_" + utostr(i);
4368
4369 std::string CI = SynthesizeBlockImpl(Blocks[i], ImplTag, DescTag);
4370
4371 InsertText(FunLocStart, CI);
4372
4373 std::string CF = SynthesizeBlockFunc(Blocks[i], i, FunName, ImplTag);
4374
4375 InsertText(FunLocStart, CF);
4376
4377 if (ImportedBlockDecls.size()) {
4378 std::string HF = SynthesizeBlockHelperFuncs(Blocks[i], i, FunName, ImplTag);
4379 InsertText(FunLocStart, HF);
4380 }
4381 std::string BD = SynthesizeBlockDescriptor(DescTag, ImplTag, i, FunName,
4382 ImportedBlockDecls.size() > 0);
4383 InsertText(FunLocStart, BD);
4384
4385 BlockDeclRefs.clear();
4386 BlockByRefDecls.clear();
4387 BlockByRefDeclsPtrSet.clear();
4388 BlockByCopyDecls.clear();
4389 BlockByCopyDeclsPtrSet.clear();
4390 ImportedBlockDecls.clear();
4391 }
4392 if (RewriteSC) {
4393 // Must insert any 'const/volatile/static here. Since it has been
4394 // removed as result of rewriting of block literals.
4395 std::string SC;
4396 if (GlobalVarDecl->getStorageClass() == SC_Static)
4397 SC = "static ";
4398 if (GlobalVarDecl->getType().isConstQualified())
4399 SC += "const ";
4400 if (GlobalVarDecl->getType().isVolatileQualified())
4401 SC += "volatile ";
4402 if (GlobalVarDecl->getType().isRestrictQualified())
4403 SC += "restrict ";
4404 InsertText(FunLocStart, SC);
4405 }
4406 if (GlobalConstructionExp) {
4407 // extra fancy dance for global literal expression.
4408
4409 // Always the latest block expression on the block stack.
4410 std::string Tag = "__";
4411 Tag += FunName;
4412 Tag += "_block_impl_";
4413 Tag += utostr(Blocks.size()-1);
4414 std::string globalBuf = "static ";
4415 globalBuf += Tag; globalBuf += " ";
4416 std::string SStr;
4417
4418 llvm::raw_string_ostream constructorExprBuf(SStr);
4419 GlobalConstructionExp->printPretty(constructorExprBuf, nullptr,
4420 PrintingPolicy(LangOpts));
4421 globalBuf += constructorExprBuf.str();
4422 globalBuf += ";\n";
4423 InsertText(FunLocStart, globalBuf);
4424 GlobalConstructionExp = nullptr;
4425 }
4426
4427 Blocks.clear();
4428 InnerDeclRefsCount.clear();
4429 InnerDeclRefs.clear();
4430 RewrittenBlockExprs.clear();
4431}
4432
4433void RewriteModernObjC::InsertBlockLiteralsWithinFunction(FunctionDecl *FD) {
4434 SourceLocation FunLocStart =
4435 (!Blocks.empty()) ? getFunctionSourceLocation(*this, FD)
4436 : FD->getTypeSpecStartLoc();
4437 StringRef FuncName = FD->getName();
4438
4439 SynthesizeBlockLiterals(FunLocStart, FuncName);
4440}
4441
4442static void BuildUniqueMethodName(std::string &Name,
4443 ObjCMethodDecl *MD) {
4444 ObjCInterfaceDecl *IFace = MD->getClassInterface();
4445 Name = std::string(IFace->getName());
4446 Name += "__" + MD->getSelector().getAsString();
4447 // Convert colons to underscores.
4448 std::string::size_type loc = 0;
4449 while ((loc = Name.find(':', loc)) != std::string::npos)
4450 Name.replace(loc, 1, "_");
4451}
4452
4453void RewriteModernObjC::InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD) {
4454 // fprintf(stderr,"In InsertBlockLiteralsWitinMethod\n");
4455 // SourceLocation FunLocStart = MD->getBeginLoc();
4456 SourceLocation FunLocStart = MD->getBeginLoc();
4457 std::string FuncName;
4458 BuildUniqueMethodName(FuncName, MD);
4459 SynthesizeBlockLiterals(FunLocStart, FuncName);
4460}
4461
4462void RewriteModernObjC::GetBlockDeclRefExprs(Stmt *S) {
4463 for (Stmt *SubStmt : S->children())
4464 if (SubStmt) {
4465 if (BlockExpr *CBE = dyn_cast<BlockExpr>(SubStmt))
4466 GetBlockDeclRefExprs(CBE->getBody());
4467 else
4468 GetBlockDeclRefExprs(SubStmt);
4469 }
4470 // Handle specific things.
4471 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S))
4472 if (DRE->refersToEnclosingVariableOrCapture() ||
4473 HasLocalVariableExternalStorage(DRE->getDecl()))
4474 // FIXME: Handle enums.
4475 BlockDeclRefs.push_back(DRE);
4476}
4477
4478void RewriteModernObjC::GetInnerBlockDeclRefExprs(Stmt *S,
4479 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
4480 llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts) {
4481 for (Stmt *SubStmt : S->children())
4482 if (SubStmt) {
4483 if (BlockExpr *CBE = dyn_cast<BlockExpr>(SubStmt)) {
4484 InnerContexts.insert(cast<DeclContext>(CBE->getBlockDecl()));
4485 GetInnerBlockDeclRefExprs(CBE->getBody(),
4486 InnerBlockDeclRefs,
4487 InnerContexts);
4488 }
4489 else
4490 GetInnerBlockDeclRefExprs(SubStmt, InnerBlockDeclRefs, InnerContexts);
4491 }
4492 // Handle specific things.
4493 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
4494 if (DRE->refersToEnclosingVariableOrCapture() ||
4495 HasLocalVariableExternalStorage(DRE->getDecl())) {
4496 if (!InnerContexts.count(DRE->getDecl()->getDeclContext()))
4497 InnerBlockDeclRefs.push_back(DRE);
4498 if (VarDecl *Var = cast<VarDecl>(DRE->getDecl()))
4499 if (Var->isFunctionOrMethodVarDecl())
4500 ImportedLocalExternalDecls.insert(Var);
4501 }
4502 }
4503}
4504
4505/// convertObjCTypeToCStyleType - This routine converts such objc types
4506/// as qualified objects, and blocks to their closest c/c++ types that
4507/// it can. It returns true if input type was modified.
4508bool RewriteModernObjC::convertObjCTypeToCStyleType(QualType &T) {
4509 QualType oldT = T;
4510 convertBlockPointerToFunctionPointer(T);
4511 if (T->isFunctionPointerType()) {
4512 QualType PointeeTy;
4513 if (const PointerType* PT = T->getAs<PointerType>()) {
4514 PointeeTy = PT->getPointeeType();
4515 if (const FunctionType *FT = PointeeTy->getAs<FunctionType>()) {
4516 T = convertFunctionTypeOfBlocks(FT);
4517 T = Context->getPointerType(T);
4518 }
4519 }
4520 }
4521
4522 convertToUnqualifiedObjCType(T);
4523 return T != oldT;
4524}
4525
4526/// convertFunctionTypeOfBlocks - This routine converts a function type
4527/// whose result type may be a block pointer or whose argument type(s)
4528/// might be block pointers to an equivalent function type replacing
4529/// all block pointers to function pointers.
4530QualType RewriteModernObjC::convertFunctionTypeOfBlocks(const FunctionType *FT) {
4531 const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
4532 // FTP will be null for closures that don't take arguments.
4533 // Generate a funky cast.
4534 SmallVector<QualType, 8> ArgTypes;
4535 QualType Res = FT->getReturnType();
4536 bool modified = convertObjCTypeToCStyleType(Res);
4537
4538 if (FTP) {
4539 for (auto &I : FTP->param_types()) {
4540 QualType t = I;
4541 // Make sure we convert "t (^)(...)" to "t (*)(...)".
4542 if (convertObjCTypeToCStyleType(t))
4543 modified = true;
4544 ArgTypes.push_back(t);
4545 }
4546 }
4547 QualType FuncType;
4548 if (modified)
4549 FuncType = getSimpleFunctionType(Res, ArgTypes);
4550 else FuncType = QualType(FT, 0);
4551 return FuncType;
4552}
4553
4554Stmt *RewriteModernObjC::SynthesizeBlockCall(CallExpr *Exp, const Expr *BlockExp) {
4555 // Navigate to relevant type information.
4556 const BlockPointerType *CPT = nullptr;
4557
4558 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(BlockExp)) {
4559 CPT = DRE->getType()->getAs<BlockPointerType>();
4560 } else if (const MemberExpr *MExpr = dyn_cast<MemberExpr>(BlockExp)) {
4561 CPT = MExpr->getType()->getAs<BlockPointerType>();
4562 }
4563 else if (const ParenExpr *PRE = dyn_cast<ParenExpr>(BlockExp)) {
4564 return SynthesizeBlockCall(Exp, PRE->getSubExpr());
4565 }
4566 else if (const ImplicitCastExpr *IEXPR = dyn_cast<ImplicitCastExpr>(BlockExp))
4567 CPT = IEXPR->getType()->getAs<BlockPointerType>();
4568 else if (const ConditionalOperator *CEXPR =
4569 dyn_cast<ConditionalOperator>(BlockExp)) {
4570 Expr *LHSExp = CEXPR->getLHS();
4571 Stmt *LHSStmt = SynthesizeBlockCall(Exp, LHSExp);
4572 Expr *RHSExp = CEXPR->getRHS();
4573 Stmt *RHSStmt = SynthesizeBlockCall(Exp, RHSExp);
4574 Expr *CONDExp = CEXPR->getCond();
4575 ConditionalOperator *CondExpr =
4576 new (Context) ConditionalOperator(CONDExp,
4577 SourceLocation(), cast<Expr>(LHSStmt),
4578 SourceLocation(), cast<Expr>(RHSStmt),
4579 Exp->getType(), VK_RValue, OK_Ordinary);
4580 return CondExpr;
4581 } else if (const ObjCIvarRefExpr *IRE = dyn_cast<ObjCIvarRefExpr>(BlockExp)) {
4582 CPT = IRE->getType()->getAs<BlockPointerType>();
4583 } else if (const PseudoObjectExpr *POE
4584 = dyn_cast<PseudoObjectExpr>(BlockExp)) {
4585 CPT = POE->getType()->castAs<BlockPointerType>();
4586 } else {
4587 assert(false && "RewriteBlockClass: Bad type")((false && "RewriteBlockClass: Bad type") ? static_cast
<void> (0) : __assert_fail ("false && \"RewriteBlockClass: Bad type\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4587, __PRETTY_FUNCTION__))
;
4588 }
4589 assert(CPT && "RewriteBlockClass: Bad type")((CPT && "RewriteBlockClass: Bad type") ? static_cast
<void> (0) : __assert_fail ("CPT && \"RewriteBlockClass: Bad type\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4589, __PRETTY_FUNCTION__))
;
4590 const FunctionType *FT = CPT->getPointeeType()->getAs<FunctionType>();
4591 assert(FT && "RewriteBlockClass: Bad type")((FT && "RewriteBlockClass: Bad type") ? static_cast<
void> (0) : __assert_fail ("FT && \"RewriteBlockClass: Bad type\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4591, __PRETTY_FUNCTION__))
;
4592 const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
4593 // FTP will be null for closures that don't take arguments.
4594
4595 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
4596 SourceLocation(), SourceLocation(),
4597 &Context->Idents.get("__block_impl"));
4598 QualType PtrBlock = Context->getPointerType(Context->getTagDeclType(RD));
4599
4600 // Generate a funky cast.
4601 SmallVector<QualType, 8> ArgTypes;
4602
4603 // Push the block argument type.
4604 ArgTypes.push_back(PtrBlock);
4605 if (FTP) {
4606 for (auto &I : FTP->param_types()) {
4607 QualType t = I;
4608 // Make sure we convert "t (^)(...)" to "t (*)(...)".
4609 if (!convertBlockPointerToFunctionPointer(t))
4610 convertToUnqualifiedObjCType(t);
4611 ArgTypes.push_back(t);
4612 }
4613 }
4614 // Now do the pointer to function cast.
4615 QualType PtrToFuncCastType = getSimpleFunctionType(Exp->getType(), ArgTypes);
4616
4617 PtrToFuncCastType = Context->getPointerType(PtrToFuncCastType);
4618
4619 CastExpr *BlkCast = NoTypeInfoCStyleCastExpr(Context, PtrBlock,
4620 CK_BitCast,
4621 const_cast<Expr*>(BlockExp));
4622 // Don't forget the parens to enforce the proper binding.
4623 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
4624 BlkCast);
4625 //PE->dump();
4626
4627 FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
4628 SourceLocation(),
4629 &Context->Idents.get("FuncPtr"),
4630 Context->VoidPtrTy, nullptr,
4631 /*BitWidth=*/nullptr, /*Mutable=*/true,
4632 ICIS_NoInit);
4633 MemberExpr *ME = MemberExpr::CreateImplicit(
4634 *Context, PE, true, FD, FD->getType(), VK_LValue, OK_Ordinary);
4635
4636 CastExpr *FunkCast = NoTypeInfoCStyleCastExpr(Context, PtrToFuncCastType,
4637 CK_BitCast, ME);
4638 PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), FunkCast);
4639
4640 SmallVector<Expr*, 8> BlkExprs;
4641 // Add the implicit argument.
4642 BlkExprs.push_back(BlkCast);
4643 // Add the user arguments.
4644 for (CallExpr::arg_iterator I = Exp->arg_begin(),
4645 E = Exp->arg_end(); I != E; ++I) {
4646 BlkExprs.push_back(*I);
4647 }
4648 CallExpr *CE = CallExpr::Create(*Context, PE, BlkExprs, Exp->getType(),
4649 VK_RValue, SourceLocation());
4650 return CE;
4651}
4652
4653// We need to return the rewritten expression to handle cases where the
4654// DeclRefExpr is embedded in another expression being rewritten.
4655// For example:
4656//
4657// int main() {
4658// __block Foo *f;
4659// __block int i;
4660//
4661// void (^myblock)() = ^() {
4662// [f test]; // f is a DeclRefExpr embedded in a message (which is being rewritten).
4663// i = 77;
4664// };
4665//}
4666Stmt *RewriteModernObjC::RewriteBlockDeclRefExpr(DeclRefExpr *DeclRefExp) {
4667 // Rewrite the byref variable into BYREFVAR->__forwarding->BYREFVAR
4668 // for each DeclRefExp where BYREFVAR is name of the variable.
4669 ValueDecl *VD = DeclRefExp->getDecl();
4670 bool isArrow = DeclRefExp->refersToEnclosingVariableOrCapture() ||
4671 HasLocalVariableExternalStorage(DeclRefExp->getDecl());
4672
4673 FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
4674 SourceLocation(),
4675 &Context->Idents.get("__forwarding"),
4676 Context->VoidPtrTy, nullptr,
4677 /*BitWidth=*/nullptr, /*Mutable=*/true,
4678 ICIS_NoInit);
4679 MemberExpr *ME = MemberExpr::CreateImplicit(
4680 *Context, DeclRefExp, isArrow, FD, FD->getType(), VK_LValue, OK_Ordinary);
4681
4682 StringRef Name = VD->getName();
4683 FD = FieldDecl::Create(*Context, nullptr, SourceLocation(), SourceLocation(),
4684 &Context->Idents.get(Name),
4685 Context->VoidPtrTy, nullptr,
4686 /*BitWidth=*/nullptr, /*Mutable=*/true,
4687 ICIS_NoInit);
4688 ME = MemberExpr::CreateImplicit(*Context, ME, true, FD, DeclRefExp->getType(),
4689 VK_LValue, OK_Ordinary);
4690
4691 // Need parens to enforce precedence.
4692 ParenExpr *PE = new (Context) ParenExpr(DeclRefExp->getExprLoc(),
4693 DeclRefExp->getExprLoc(),
4694 ME);
4695 ReplaceStmt(DeclRefExp, PE);
4696 return PE;
4697}
4698
4699// Rewrites the imported local variable V with external storage
4700// (static, extern, etc.) as *V
4701//
4702Stmt *RewriteModernObjC::RewriteLocalVariableExternalStorage(DeclRefExpr *DRE) {
4703 ValueDecl *VD = DRE->getDecl();
4704 if (VarDecl *Var = dyn_cast<VarDecl>(VD))
4705 if (!ImportedLocalExternalDecls.count(Var))
4706 return DRE;
4707 Expr *Exp = new (Context) UnaryOperator(DRE, UO_Deref, DRE->getType(),
4708 VK_LValue, OK_Ordinary,
4709 DRE->getLocation(), false);
4710 // Need parens to enforce precedence.
4711 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
4712 Exp);
4713 ReplaceStmt(DRE, PE);
4714 return PE;
4715}
4716
4717void RewriteModernObjC::RewriteCastExpr(CStyleCastExpr *CE) {
4718 SourceLocation LocStart = CE->getLParenLoc();
4719 SourceLocation LocEnd = CE->getRParenLoc();
4720
4721 // Need to avoid trying to rewrite synthesized casts.
4722 if (LocStart.isInvalid())
4723 return;
4724 // Need to avoid trying to rewrite casts contained in macros.
4725 if (!Rewriter::isRewritable(LocStart) || !Rewriter::isRewritable(LocEnd))
4726 return;
4727
4728 const char *startBuf = SM->getCharacterData(LocStart);
4729 const char *endBuf = SM->getCharacterData(LocEnd);
4730 QualType QT = CE->getType();
4731 const Type* TypePtr = QT->getAs<Type>();
4732 if (isa<TypeOfExprType>(TypePtr)) {
4733 const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
4734 QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
4735 std::string TypeAsString = "(";
4736 RewriteBlockPointerType(TypeAsString, QT);
4737 TypeAsString += ")";
4738 ReplaceText(LocStart, endBuf-startBuf+1, TypeAsString);
4739 return;
4740 }
4741 // advance the location to startArgList.
4742 const char *argPtr = startBuf;
4743
4744 while (*argPtr++ && (argPtr < endBuf)) {
4745 switch (*argPtr) {
4746 case '^':
4747 // Replace the '^' with '*'.
4748 LocStart = LocStart.getLocWithOffset(argPtr-startBuf);
4749 ReplaceText(LocStart, 1, "*");
4750 break;
4751 }
4752 }
4753}
4754
4755void RewriteModernObjC::RewriteImplicitCastObjCExpr(CastExpr *IC) {
4756 CastKind CastKind = IC->getCastKind();
4757 if (CastKind != CK_BlockPointerToObjCPointerCast &&
4758 CastKind != CK_AnyPointerToBlockPointerCast)
4759 return;
4760
4761 QualType QT = IC->getType();
4762 (void)convertBlockPointerToFunctionPointer(QT);
4763 std::string TypeString(QT.getAsString(Context->getPrintingPolicy()));
4764 std::string Str = "(";
4765 Str += TypeString;
4766 Str += ")";
4767 InsertText(IC->getSubExpr()->getBeginLoc(), Str);
4768}
4769
4770void RewriteModernObjC::RewriteBlockPointerFunctionArgs(FunctionDecl *FD) {
4771 SourceLocation DeclLoc = FD->getLocation();
4772 unsigned parenCount = 0;
4773
4774 // We have 1 or more arguments that have closure pointers.
4775 const char *startBuf = SM->getCharacterData(DeclLoc);
4776 const char *startArgList = strchr(startBuf, '(');
4777
4778 assert((*startArgList == '(') && "Rewriter fuzzy parser confused")(((*startArgList == '(') && "Rewriter fuzzy parser confused"
) ? static_cast<void> (0) : __assert_fail ("(*startArgList == '(') && \"Rewriter fuzzy parser confused\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4778, __PRETTY_FUNCTION__))
;
4779
4780 parenCount++;
4781 // advance the location to startArgList.
4782 DeclLoc = DeclLoc.getLocWithOffset(startArgList-startBuf);
4783 assert((DeclLoc.isValid()) && "Invalid DeclLoc")(((DeclLoc.isValid()) && "Invalid DeclLoc") ? static_cast
<void> (0) : __assert_fail ("(DeclLoc.isValid()) && \"Invalid DeclLoc\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4783, __PRETTY_FUNCTION__))
;
4784
4785 const char *argPtr = startArgList;
4786
4787 while (*argPtr++ && parenCount) {
4788 switch (*argPtr) {
4789 case '^':
4790 // Replace the '^' with '*'.
4791 DeclLoc = DeclLoc.getLocWithOffset(argPtr-startArgList);
4792 ReplaceText(DeclLoc, 1, "*");
4793 break;
4794 case '(':
4795 parenCount++;
4796 break;
4797 case ')':
4798 parenCount--;
4799 break;
4800 }
4801 }
4802}
4803
4804bool RewriteModernObjC::PointerTypeTakesAnyBlockArguments(QualType QT) {
4805 const FunctionProtoType *FTP;
4806 const PointerType *PT = QT->getAs<PointerType>();
4807 if (PT) {
4808 FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
4809 } else {
4810 const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
4811 assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type")((BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type"
) ? static_cast<void> (0) : __assert_fail ("BPT && \"BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4811, __PRETTY_FUNCTION__))
;
4812 FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
4813 }
4814 if (FTP) {
4815 for (const auto &I : FTP->param_types())
4816 if (isTopLevelBlockPointerType(I))
4817 return true;
4818 }
4819 return false;
4820}
4821
4822bool RewriteModernObjC::PointerTypeTakesAnyObjCQualifiedType(QualType QT) {
4823 const FunctionProtoType *FTP;
4824 const PointerType *PT = QT->getAs<PointerType>();
4825 if (PT) {
4826 FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
4827 } else {
4828 const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
4829 assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type")((BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type"
) ? static_cast<void> (0) : __assert_fail ("BPT && \"BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4829, __PRETTY_FUNCTION__))
;
4830 FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
4831 }
4832 if (FTP) {
4833 for (const auto &I : FTP->param_types()) {
4834 if (I->isObjCQualifiedIdType())
4835 return true;
4836 if (I->isObjCObjectPointerType() &&
4837 I->getPointeeType()->isObjCQualifiedInterfaceType())
4838 return true;
4839 }
4840
4841 }
4842 return false;
4843}
4844
4845void RewriteModernObjC::GetExtentOfArgList(const char *Name, const char *&LParen,
4846 const char *&RParen) {
4847 const char *argPtr = strchr(Name, '(');
4848 assert((*argPtr == '(') && "Rewriter fuzzy parser confused")(((*argPtr == '(') && "Rewriter fuzzy parser confused"
) ? static_cast<void> (0) : __assert_fail ("(*argPtr == '(') && \"Rewriter fuzzy parser confused\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4848, __PRETTY_FUNCTION__))
;
4849
4850 LParen = argPtr; // output the start.
4851 argPtr++; // skip past the left paren.
4852 unsigned parenCount = 1;
4853
4854 while (*argPtr && parenCount) {
4855 switch (*argPtr) {
4856 case '(': parenCount++; break;
4857 case ')': parenCount--; break;
4858 default: break;
4859 }
4860 if (parenCount) argPtr++;
4861 }
4862 assert((*argPtr == ')') && "Rewriter fuzzy parser confused")(((*argPtr == ')') && "Rewriter fuzzy parser confused"
) ? static_cast<void> (0) : __assert_fail ("(*argPtr == ')') && \"Rewriter fuzzy parser confused\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4862, __PRETTY_FUNCTION__))
;
4863 RParen = argPtr; // output the end
4864}
4865
4866void RewriteModernObjC::RewriteBlockPointerDecl(NamedDecl *ND) {
4867 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
4868 RewriteBlockPointerFunctionArgs(FD);
4869 return;
4870 }
4871 // Handle Variables and Typedefs.
4872 SourceLocation DeclLoc = ND->getLocation();
4873 QualType DeclT;
4874 if (VarDecl *VD = dyn_cast<VarDecl>(ND))
4875 DeclT = VD->getType();
4876 else if (TypedefNameDecl *TDD = dyn_cast<TypedefNameDecl>(ND))
4877 DeclT = TDD->getUnderlyingType();
4878 else if (FieldDecl *FD = dyn_cast<FieldDecl>(ND))
4879 DeclT = FD->getType();
4880 else
4881 llvm_unreachable("RewriteBlockPointerDecl(): Decl type not yet handled")::llvm::llvm_unreachable_internal("RewriteBlockPointerDecl(): Decl type not yet handled"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4881)
;
4882
4883 const char *startBuf = SM->getCharacterData(DeclLoc);
4884 const char *endBuf = startBuf;
4885 // scan backward (from the decl location) for the end of the previous decl.
4886 while (*startBuf != '^' && *startBuf != ';' && startBuf != MainFileStart)
4887 startBuf--;
4888 SourceLocation Start = DeclLoc.getLocWithOffset(startBuf-endBuf);
4889 std::string buf;
4890 unsigned OrigLength=0;
4891 // *startBuf != '^' if we are dealing with a pointer to function that
4892 // may take block argument types (which will be handled below).
4893 if (*startBuf == '^') {
4894 // Replace the '^' with '*', computing a negative offset.
4895 buf = '*';
4896 startBuf++;
4897 OrigLength++;
4898 }
4899 while (*startBuf != ')') {
4900 buf += *startBuf;
4901 startBuf++;
4902 OrigLength++;
4903 }
4904 buf += ')';
4905 OrigLength++;
4906
4907 if (PointerTypeTakesAnyBlockArguments(DeclT) ||
4908 PointerTypeTakesAnyObjCQualifiedType(DeclT)) {
4909 // Replace the '^' with '*' for arguments.
4910 // Replace id<P> with id/*<>*/
4911 DeclLoc = ND->getLocation();
4912 startBuf = SM->getCharacterData(DeclLoc);
4913 const char *argListBegin, *argListEnd;
4914 GetExtentOfArgList(startBuf, argListBegin, argListEnd);
4915 while (argListBegin < argListEnd) {
4916 if (*argListBegin == '^')
4917 buf += '*';
4918 else if (*argListBegin == '<') {
4919 buf += "/*";
4920 buf += *argListBegin++;
4921 OrigLength++;
4922 while (*argListBegin != '>') {
4923 buf += *argListBegin++;
4924 OrigLength++;
4925 }
4926 buf += *argListBegin;
4927 buf += "*/";
4928 }
4929 else
4930 buf += *argListBegin;
4931 argListBegin++;
4932 OrigLength++;
4933 }
4934 buf += ')';
4935 OrigLength++;
4936 }
4937 ReplaceText(Start, OrigLength, buf);
4938}
4939
4940/// SynthesizeByrefCopyDestroyHelper - This routine synthesizes:
4941/// void __Block_byref_id_object_copy(struct Block_byref_id_object *dst,
4942/// struct Block_byref_id_object *src) {
4943/// _Block_object_assign (&_dest->object, _src->object,
4944/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4945/// [|BLOCK_FIELD_IS_WEAK]) // object
4946/// _Block_object_assign(&_dest->object, _src->object,
4947/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4948/// [|BLOCK_FIELD_IS_WEAK]) // block
4949/// }
4950/// And:
4951/// void __Block_byref_id_object_dispose(struct Block_byref_id_object *_src) {
4952/// _Block_object_dispose(_src->object,
4953/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4954/// [|BLOCK_FIELD_IS_WEAK]) // object
4955/// _Block_object_dispose(_src->object,
4956/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4957/// [|BLOCK_FIELD_IS_WEAK]) // block
4958/// }
4959
4960std::string RewriteModernObjC::SynthesizeByrefCopyDestroyHelper(VarDecl *VD,
4961 int flag) {
4962 std::string S;
4963 if (CopyDestroyCache.count(flag))
4964 return S;
4965 CopyDestroyCache.insert(flag);
4966 S = "static void __Block_byref_id_object_copy_";
4967 S += utostr(flag);
4968 S += "(void *dst, void *src) {\n";
4969
4970 // offset into the object pointer is computed as:
4971 // void * + void* + int + int + void* + void *
4972 unsigned IntSize =
4973 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
4974 unsigned VoidPtrSize =
4975 static_cast<unsigned>(Context->getTypeSize(Context->VoidPtrTy));
4976
4977 unsigned offset = (VoidPtrSize*4 + IntSize + IntSize)/Context->getCharWidth();
4978 S += " _Block_object_assign((char*)dst + ";
4979 S += utostr(offset);
4980 S += ", *(void * *) ((char*)src + ";
4981 S += utostr(offset);
4982 S += "), ";
4983 S += utostr(flag);
4984 S += ");\n}\n";
4985
4986 S += "static void __Block_byref_id_object_dispose_";
4987 S += utostr(flag);
4988 S += "(void *src) {\n";
4989 S += " _Block_object_dispose(*(void * *) ((char*)src + ";
4990 S += utostr(offset);
4991 S += "), ";
4992 S += utostr(flag);
4993 S += ");\n}\n";
4994 return S;
4995}
4996
4997/// RewriteByRefVar - For each __block typex ND variable this routine transforms
4998/// the declaration into:
4999/// struct __Block_byref_ND {
5000/// void *__isa; // NULL for everything except __weak pointers
5001/// struct __Block_byref_ND *__forwarding;
5002/// int32_t __flags;
5003/// int32_t __size;
5004/// void *__Block_byref_id_object_copy; // If variable is __block ObjC object
5005/// void *__Block_byref_id_object_dispose; // If variable is __block ObjC object
5006/// typex ND;
5007/// };
5008///
5009/// It then replaces declaration of ND variable with:
5010/// struct __Block_byref_ND ND = {__isa=0B, __forwarding=&ND, __flags=some_flag,
5011/// __size=sizeof(struct __Block_byref_ND),
5012/// ND=initializer-if-any};
5013///
5014///
5015void RewriteModernObjC::RewriteByRefVar(VarDecl *ND, bool firstDecl,
5016 bool lastDecl) {
5017 int flag = 0;
5018 int isa = 0;
5019 SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
5020 if (DeclLoc.isInvalid())
5021 // If type location is missing, it is because of missing type (a warning).
5022 // Use variable's location which is good for this case.
5023 DeclLoc = ND->getLocation();
5024 const char *startBuf = SM->getCharacterData(DeclLoc);
5025 SourceLocation X = ND->getEndLoc();
5026 X = SM->getExpansionLoc(X);
5027 const char *endBuf = SM->getCharacterData(X);
5028 std::string Name(ND->getNameAsString());
5029 std::string ByrefType;
5030 RewriteByRefString(ByrefType, Name, ND, true);
5031 ByrefType += " {\n";
5032 ByrefType += " void *__isa;\n";
5033 RewriteByRefString(ByrefType, Name, ND);
5034 ByrefType += " *__forwarding;\n";
5035 ByrefType += " int __flags;\n";
5036 ByrefType += " int __size;\n";
5037 // Add void *__Block_byref_id_object_copy;
5038 // void *__Block_byref_id_object_dispose; if needed.
5039 QualType Ty = ND->getType();
5040 bool HasCopyAndDispose = Context->BlockRequiresCopying(Ty, ND);
5041 if (HasCopyAndDispose) {
5042 ByrefType += " void (*__Block_byref_id_object_copy)(void*, void*);\n";
5043 ByrefType += " void (*__Block_byref_id_object_dispose)(void*);\n";
5044 }
5045
5046 QualType T = Ty;
5047 (void)convertBlockPointerToFunctionPointer(T);
5048 T.getAsStringInternal(Name, Context->getPrintingPolicy());
5049
5050 ByrefType += " " + Name + ";\n";
5051 ByrefType += "};\n";
5052 // Insert this type in global scope. It is needed by helper function.
5053 SourceLocation FunLocStart;
5054 if (CurFunctionDef)
5055 FunLocStart = getFunctionSourceLocation(*this, CurFunctionDef);
5056 else {
5057 assert(CurMethodDef && "RewriteByRefVar - CurMethodDef is null")((CurMethodDef && "RewriteByRefVar - CurMethodDef is null"
) ? static_cast<void> (0) : __assert_fail ("CurMethodDef && \"RewriteByRefVar - CurMethodDef is null\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5057, __PRETTY_FUNCTION__))
;
5058 FunLocStart = CurMethodDef->getBeginLoc();
5059 }
5060 InsertText(FunLocStart, ByrefType);
5061
5062 if (Ty.isObjCGCWeak()) {
5063 flag |= BLOCK_FIELD_IS_WEAK;
5064 isa = 1;
5065 }
5066 if (HasCopyAndDispose) {
5067 flag = BLOCK_BYREF_CALLER;
5068 QualType Ty = ND->getType();
5069 // FIXME. Handle __weak variable (BLOCK_FIELD_IS_WEAK) as well.
5070 if (Ty->isBlockPointerType())
5071 flag |= BLOCK_FIELD_IS_BLOCK;
5072 else
5073 flag |= BLOCK_FIELD_IS_OBJECT;
5074 std::string HF = SynthesizeByrefCopyDestroyHelper(ND, flag);
5075 if (!HF.empty())
5076 Preamble += HF;
5077 }
5078
5079 // struct __Block_byref_ND ND =
5080 // {0, &ND, some_flag, __size=sizeof(struct __Block_byref_ND),
5081 // initializer-if-any};
5082 bool hasInit = (ND->getInit() != nullptr);
5083 // FIXME. rewriter does not support __block c++ objects which
5084 // require construction.
5085 if (hasInit)
5086 if (CXXConstructExpr *CExp = dyn_cast<CXXConstructExpr>(ND->getInit())) {
5087 CXXConstructorDecl *CXXDecl = CExp->getConstructor();
5088 if (CXXDecl && CXXDecl->isDefaultConstructor())
5089 hasInit = false;
5090 }
5091
5092 unsigned flags = 0;
5093 if (HasCopyAndDispose)
5094 flags |= BLOCK_HAS_COPY_DISPOSE;
5095 Name = ND->getNameAsString();
5096 ByrefType.clear();
5097 RewriteByRefString(ByrefType, Name, ND);
5098 std::string ForwardingCastType("(");
5099 ForwardingCastType += ByrefType + " *)";
5100 ByrefType += " " + Name + " = {(void*)";
5101 ByrefType += utostr(isa);
5102 ByrefType += "," + ForwardingCastType + "&" + Name + ", ";
5103 ByrefType += utostr(flags);
5104 ByrefType += ", ";
5105 ByrefType += "sizeof(";
5106 RewriteByRefString(ByrefType, Name, ND);
5107 ByrefType += ")";
5108 if (HasCopyAndDispose) {
5109 ByrefType += ", __Block_byref_id_object_copy_";
5110 ByrefType += utostr(flag);
5111 ByrefType += ", __Block_byref_id_object_dispose_";
5112 ByrefType += utostr(flag);
5113 }
5114
5115 if (!firstDecl) {
5116 // In multiple __block declarations, and for all but 1st declaration,
5117 // find location of the separating comma. This would be start location
5118 // where new text is to be inserted.
5119 DeclLoc = ND->getLocation();
5120 const char *startDeclBuf = SM->getCharacterData(DeclLoc);
5121 const char *commaBuf = startDeclBuf;
5122 while (*commaBuf != ',')
5123 commaBuf--;
5124 assert((*commaBuf == ',') && "RewriteByRefVar: can't find ','")(((*commaBuf == ',') && "RewriteByRefVar: can't find ','"
) ? static_cast<void> (0) : __assert_fail ("(*commaBuf == ',') && \"RewriteByRefVar: can't find ','\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5124, __PRETTY_FUNCTION__))
;
5125 DeclLoc = DeclLoc.getLocWithOffset(commaBuf - startDeclBuf);
5126 startBuf = commaBuf;
5127 }
5128
5129 if (!hasInit) {
5130 ByrefType += "};\n";
5131 unsigned nameSize = Name.size();
5132 // for block or function pointer declaration. Name is already
5133 // part of the declaration.
5134 if (Ty->isBlockPointerType() || Ty->isFunctionPointerType())
5135 nameSize = 1;
5136 ReplaceText(DeclLoc, endBuf-startBuf+nameSize, ByrefType);
5137 }
5138 else {
5139 ByrefType += ", ";
5140 SourceLocation startLoc;
5141 Expr *E = ND->getInit();
5142 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
5143 startLoc = ECE->getLParenLoc();
5144 else
5145 startLoc = E->getBeginLoc();
5146 startLoc = SM->getExpansionLoc(startLoc);
5147 endBuf = SM->getCharacterData(startLoc);
5148 ReplaceText(DeclLoc, endBuf-startBuf, ByrefType);
5149
5150 const char separator = lastDecl ? ';' : ',';
5151 const char *startInitializerBuf = SM->getCharacterData(startLoc);
5152 const char *separatorBuf = strchr(startInitializerBuf, separator);
5153 assert((*separatorBuf == separator) &&(((*separatorBuf == separator) && "RewriteByRefVar: can't find ';' or ','"
) ? static_cast<void> (0) : __assert_fail ("(*separatorBuf == separator) && \"RewriteByRefVar: can't find ';' or ','\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5154, __PRETTY_FUNCTION__))
5154 "RewriteByRefVar: can't find ';' or ','")(((*separatorBuf == separator) && "RewriteByRefVar: can't find ';' or ','"
) ? static_cast<void> (0) : __assert_fail ("(*separatorBuf == separator) && \"RewriteByRefVar: can't find ';' or ','\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5154, __PRETTY_FUNCTION__))
;
5155 SourceLocation separatorLoc =
5156 startLoc.getLocWithOffset(separatorBuf-startInitializerBuf);
5157
5158 InsertText(separatorLoc, lastDecl ? "}" : "};\n");
5159 }
5160}
5161
5162void RewriteModernObjC::CollectBlockDeclRefInfo(BlockExpr *Exp) {
5163 // Add initializers for any closure decl refs.
5164 GetBlockDeclRefExprs(Exp->getBody());
5165 if (BlockDeclRefs.size()) {
5166 // Unique all "by copy" declarations.
5167 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5168 if (!BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
5169 if (!BlockByCopyDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
5170 BlockByCopyDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
5171 BlockByCopyDecls.push_back(BlockDeclRefs[i]->getDecl());
5172 }
5173 }
5174 // Unique all "by ref" declarations.
5175 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5176 if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
5177 if (!BlockByRefDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
5178 BlockByRefDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
5179 BlockByRefDecls.push_back(BlockDeclRefs[i]->getDecl());
5180 }
5181 }
5182 // Find any imported blocks...they will need special attention.
5183 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5184 if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
5185 BlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
5186 BlockDeclRefs[i]->getType()->isBlockPointerType())
5187 ImportedBlockDecls.insert(BlockDeclRefs[i]->getDecl());
5188 }
5189}
5190
5191FunctionDecl *RewriteModernObjC::SynthBlockInitFunctionDecl(StringRef name) {
5192 IdentifierInfo *ID = &Context->Idents.get(name);
5193 QualType FType = Context->getFunctionNoProtoType(Context->VoidPtrTy);
5194 return FunctionDecl::Create(*Context, TUDecl, SourceLocation(),
5195 SourceLocation(), ID, FType, nullptr, SC_Extern,
5196 false, false);
5197}
5198
5199Stmt *RewriteModernObjC::SynthBlockInitExpr(BlockExpr *Exp,
5200 const SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs) {
5201 const BlockDecl *block = Exp->getBlockDecl();
5202
5203 Blocks.push_back(Exp);
5204
5205 CollectBlockDeclRefInfo(Exp);
5206
5207 // Add inner imported variables now used in current block.
5208 int countOfInnerDecls = 0;
5209 if (!InnerBlockDeclRefs.empty()) {
5210 for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++) {
5211 DeclRefExpr *Exp = InnerBlockDeclRefs[i];
5212 ValueDecl *VD = Exp->getDecl();
5213 if (!VD->hasAttr<BlocksAttr>() && !BlockByCopyDeclsPtrSet.count(VD)) {
5214 // We need to save the copied-in variables in nested
5215 // blocks because it is needed at the end for some of the API generations.
5216 // See SynthesizeBlockLiterals routine.
5217 InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
5218 BlockDeclRefs.push_back(Exp);
5219 BlockByCopyDeclsPtrSet.insert(VD);
5220 BlockByCopyDecls.push_back(VD);
5221 }
5222 if (VD->hasAttr<BlocksAttr>() && !BlockByRefDeclsPtrSet.count(VD)) {
5223 InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
5224 BlockDeclRefs.push_back(Exp);
5225 BlockByRefDeclsPtrSet.insert(VD);
5226 BlockByRefDecls.push_back(VD);
5227 }
5228 }
5229 // Find any imported blocks...they will need special attention.
5230 for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++)
5231 if (InnerBlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
5232 InnerBlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
5233 InnerBlockDeclRefs[i]->getType()->isBlockPointerType())
5234 ImportedBlockDecls.insert(InnerBlockDeclRefs[i]->getDecl());
5235 }
5236 InnerDeclRefsCount.push_back(countOfInnerDecls);
5237
5238 std::string FuncName;
5239
5240 if (CurFunctionDef)
5241 FuncName = CurFunctionDef->getNameAsString();
5242 else if (CurMethodDef)
5243 BuildUniqueMethodName(FuncName, CurMethodDef);
5244 else if (GlobalVarDecl)
5245 FuncName = std::string(GlobalVarDecl->getNameAsString());
5246
5247 bool GlobalBlockExpr =
5248 block->getDeclContext()->getRedeclContext()->isFileContext();
5249
5250 if (GlobalBlockExpr && !GlobalVarDecl) {
5251 Diags.Report(block->getLocation(), GlobalBlockRewriteFailedDiag);
5252 GlobalBlockExpr = false;
5253 }
5254
5255 std::string BlockNumber = utostr(Blocks.size()-1);
5256
5257 std::string Func = "__" + FuncName + "_block_func_" + BlockNumber;
5258
5259 // Get a pointer to the function type so we can cast appropriately.
5260 QualType BFT = convertFunctionTypeOfBlocks(Exp->getFunctionType());
5261 QualType FType = Context->getPointerType(BFT);
5262
5263 FunctionDecl *FD;
5264 Expr *NewRep;
5265
5266 // Simulate a constructor call...
5267 std::string Tag;
5268
5269 if (GlobalBlockExpr)
5270 Tag = "__global_";
5271 else
5272 Tag = "__";
5273 Tag += FuncName + "_block_impl_" + BlockNumber;
5274
5275 FD = SynthBlockInitFunctionDecl(Tag);
5276 DeclRefExpr *DRE = new (Context)
5277 DeclRefExpr(*Context, FD, false, FType, VK_RValue, SourceLocation());
5278
5279 SmallVector<Expr*, 4> InitExprs;
5280
5281 // Initialize the block function.
5282 FD = SynthBlockInitFunctionDecl(Func);
5283 DeclRefExpr *Arg = new (Context) DeclRefExpr(
5284 *Context, FD, false, FD->getType(), VK_LValue, SourceLocation());
5285 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy,
5286 CK_BitCast, Arg);
5287 InitExprs.push_back(castExpr);
5288
5289 // Initialize the block descriptor.
5290 std::string DescData = "__" + FuncName + "_block_desc_" + BlockNumber + "_DATA";
5291
5292 VarDecl *NewVD = VarDecl::Create(
5293 *Context, TUDecl, SourceLocation(), SourceLocation(),
5294 &Context->Idents.get(DescData), Context->VoidPtrTy, nullptr, SC_Static);
5295 UnaryOperator *DescRefExpr = new (Context) UnaryOperator(
5296 new (Context) DeclRefExpr(*Context, NewVD, false, Context->VoidPtrTy,
5297 VK_LValue, SourceLocation()),
5298 UO_AddrOf, Context->getPointerType(Context->VoidPtrTy), VK_RValue,
5299 OK_Ordinary, SourceLocation(), false);
5300 InitExprs.push_back(DescRefExpr);
5301
5302 // Add initializers for any closure decl refs.
5303 if (BlockDeclRefs.size()) {
5304 Expr *Exp;
5305 // Output all "by copy" declarations.
5306 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
5307 E = BlockByCopyDecls.end(); I != E; ++I) {
5308 if (isObjCType((*I)->getType())) {
5309 // FIXME: Conform to ABI ([[obj retain] autorelease]).
5310 FD = SynthBlockInitFunctionDecl((*I)->getName());
5311 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5312 VK_LValue, SourceLocation());
5313 if (HasLocalVariableExternalStorage(*I)) {
5314 QualType QT = (*I)->getType();
5315 QT = Context->getPointerType(QT);
5316 Exp = new (Context) UnaryOperator(Exp, UO_AddrOf, QT, VK_RValue,
5317 OK_Ordinary, SourceLocation(),
5318 false);
5319 }
5320 } else if (isTopLevelBlockPointerType((*I)->getType())) {
5321 FD = SynthBlockInitFunctionDecl((*I)->getName());
5322 Arg = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5323 VK_LValue, SourceLocation());
5324 Exp = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy,
5325 CK_BitCast, Arg);
5326 } else {
5327 FD = SynthBlockInitFunctionDecl((*I)->getName());
5328 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5329 VK_LValue, SourceLocation());
5330 if (HasLocalVariableExternalStorage(*I)) {
5331 QualType QT = (*I)->getType();
5332 QT = Context->getPointerType(QT);
5333 Exp = new (Context) UnaryOperator(Exp, UO_AddrOf, QT, VK_RValue,
5334 OK_Ordinary, SourceLocation(),
5335 false);
5336 }
5337
5338 }
5339 InitExprs.push_back(Exp);
5340 }
5341 // Output all "by ref" declarations.
5342 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
5343 E = BlockByRefDecls.end(); I != E; ++I) {
5344 ValueDecl *ND = (*I);
5345 std::string Name(ND->getNameAsString());
5346 std::string RecName;
5347 RewriteByRefString(RecName, Name, ND, true);
5348 IdentifierInfo *II = &Context->Idents.get(RecName.c_str()
5349 + sizeof("struct"));
5350 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
5351 SourceLocation(), SourceLocation(),
5352 II);
5353 assert(RD && "SynthBlockInitExpr(): Can't find RecordDecl")((RD && "SynthBlockInitExpr(): Can't find RecordDecl"
) ? static_cast<void> (0) : __assert_fail ("RD && \"SynthBlockInitExpr(): Can't find RecordDecl\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5353, __PRETTY_FUNCTION__))
;
5354 QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
5355
5356 FD = SynthBlockInitFunctionDecl((*I)->getName());
5357 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5358 VK_LValue, SourceLocation());
5359 bool isNestedCapturedVar = false;
5360 if (block)
5361 for (const auto &CI : block->captures()) {
5362 const VarDecl *variable = CI.getVariable();
5363 if (variable == ND && CI.isNested()) {
5364 assert (CI.isByRef() &&((CI.isByRef() && "SynthBlockInitExpr - captured block variable is not byref"
) ? static_cast<void> (0) : __assert_fail ("CI.isByRef() && \"SynthBlockInitExpr - captured block variable is not byref\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5365, __PRETTY_FUNCTION__))
5365 "SynthBlockInitExpr - captured block variable is not byref")((CI.isByRef() && "SynthBlockInitExpr - captured block variable is not byref"
) ? static_cast<void> (0) : __assert_fail ("CI.isByRef() && \"SynthBlockInitExpr - captured block variable is not byref\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5365, __PRETTY_FUNCTION__))
;
5366 isNestedCapturedVar = true;
5367 break;
5368 }
5369 }
5370 // captured nested byref variable has its address passed. Do not take
5371 // its address again.
5372 if (!isNestedCapturedVar)
5373 Exp = new (Context) UnaryOperator(Exp, UO_AddrOf,
5374 Context->getPointerType(Exp->getType()),
5375 VK_RValue, OK_Ordinary, SourceLocation(),
5376 false);
5377 Exp = NoTypeInfoCStyleCastExpr(Context, castT, CK_BitCast, Exp);
5378 InitExprs.push_back(Exp);
5379 }
5380 }
5381 if (ImportedBlockDecls.size()) {
5382 // generate BLOCK_HAS_COPY_DISPOSE(have helper funcs) | BLOCK_HAS_DESCRIPTOR
5383 int flag = (BLOCK_HAS_COPY_DISPOSE | BLOCK_HAS_DESCRIPTOR);
5384 unsigned IntSize =
5385 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
5386 Expr *FlagExp = IntegerLiteral::Create(*Context, llvm::APInt(IntSize, flag),
5387 Context->IntTy, SourceLocation());
5388 InitExprs.push_back(FlagExp);
5389 }
5390 NewRep = CallExpr::Create(*Context, DRE, InitExprs, FType, VK_LValue,
5391 SourceLocation());
5392
5393 if (GlobalBlockExpr) {
5394 assert (!GlobalConstructionExp &&((!GlobalConstructionExp && "SynthBlockInitExpr - GlobalConstructionExp must be null"
) ? static_cast<void> (0) : __assert_fail ("!GlobalConstructionExp && \"SynthBlockInitExpr - GlobalConstructionExp must be null\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5395, __PRETTY_FUNCTION__))
5395 "SynthBlockInitExpr - GlobalConstructionExp must be null")((!GlobalConstructionExp && "SynthBlockInitExpr - GlobalConstructionExp must be null"
) ? static_cast<void> (0) : __assert_fail ("!GlobalConstructionExp && \"SynthBlockInitExpr - GlobalConstructionExp must be null\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5395, __PRETTY_FUNCTION__))
;
5396 GlobalConstructionExp = NewRep;
5397 NewRep = DRE;
5398 }
5399
5400 NewRep = new (Context) UnaryOperator(NewRep, UO_AddrOf,
5401 Context->getPointerType(NewRep->getType()),
5402 VK_RValue, OK_Ordinary, SourceLocation(), false);
5403 NewRep = NoTypeInfoCStyleCastExpr(Context, FType, CK_BitCast,
5404 NewRep);
5405 // Put Paren around the call.
5406 NewRep = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
5407 NewRep);
5408
5409 BlockDeclRefs.clear();
5410 BlockByRefDecls.clear();
5411 BlockByRefDeclsPtrSet.clear();
5412 BlockByCopyDecls.clear();
5413 BlockByCopyDeclsPtrSet.clear();
5414 ImportedBlockDecls.clear();
5415 return NewRep;
5416}
5417
5418bool RewriteModernObjC::IsDeclStmtInForeachHeader(DeclStmt *DS) {
5419 if (const ObjCForCollectionStmt * CS =
5420 dyn_cast<ObjCForCollectionStmt>(Stmts.back()))
5421 return CS->getElement() == DS;
5422 return false;
5423}
5424
5425//===----------------------------------------------------------------------===//
5426// Function Body / Expression rewriting
5427//===----------------------------------------------------------------------===//
5428
5429Stmt *RewriteModernObjC::RewriteFunctionBodyOrGlobalInitializer(Stmt *S) {
5430 if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
1
Assuming 'S' is not a 'SwitchStmt'
2
Assuming 'S' is not a 'WhileStmt'
5
Taking false branch
5431 isa<DoStmt>(S) || isa<ForStmt>(S))
3
Assuming 'S' is not a 'DoStmt'
4
Assuming 'S' is not a 'ForStmt'
5432 Stmts.push_back(S);
5433 else if (isa<ObjCForCollectionStmt>(S)) {
6
Assuming 'S' is not a 'ObjCForCollectionStmt'
7
Taking false branch
5434 Stmts.push_back(S);
5435 ObjCBcLabelNo.push_back(++BcLabelCount);
5436 }
5437
5438 // Pseudo-object operations and ivar references need special
5439 // treatment because we're going to recursively rewrite them.
5440 if (PseudoObjectExpr *PseudoOp
8.1
'PseudoOp' is null
= dyn_cast<PseudoObjectExpr>(S)) {
8
Assuming 'S' is not a 'PseudoObjectExpr'
9
Taking false branch
5441 if (isa<BinaryOperator>(PseudoOp->getSyntacticForm())) {
5442 return RewritePropertyOrImplicitSetter(PseudoOp);
5443 } else {
5444 return RewritePropertyOrImplicitGetter(PseudoOp);
5445 }
5446 } else if (ObjCIvarRefExpr *IvarRefExpr
10.1
'IvarRefExpr' is null
= dyn_cast<ObjCIvarRefExpr>(S)) {
10
Assuming 'S' is not a 'ObjCIvarRefExpr'
11
Taking false branch
5447 return RewriteObjCIvarRefExpr(IvarRefExpr);
5448 }
5449 else if (isa<OpaqueValueExpr>(S))
12
Assuming 'S' is not a 'OpaqueValueExpr'
13
Taking false branch
5450 S = cast<OpaqueValueExpr>(S)->getSourceExpr();
5451
5452 SourceRange OrigStmtRange = S->getSourceRange();
5453
5454 // Perform a bottom up rewrite of all children.
5455 for (Stmt *&childStmt : S->children())
5456 if (childStmt) {
5457 Stmt *newStmt = RewriteFunctionBodyOrGlobalInitializer(childStmt);
5458 if (newStmt) {
5459 childStmt = newStmt;
5460 }
5461 }
5462
5463 if (BlockExpr *BE
14.1
'BE' is null
= dyn_cast<BlockExpr>(S)) {
14
Assuming 'S' is not a 'BlockExpr'
15
Taking false branch
5464 SmallVector<DeclRefExpr *, 8> InnerBlockDeclRefs;
5465 llvm::SmallPtrSet<const DeclContext *, 8> InnerContexts;
5466 InnerContexts.insert(BE->getBlockDecl());
5467 ImportedLocalExternalDecls.clear();
5468 GetInnerBlockDeclRefExprs(BE->getBody(),
5469 InnerBlockDeclRefs, InnerContexts);
5470 // Rewrite the block body in place.
5471 Stmt *SaveCurrentBody = CurrentBody;
5472 CurrentBody = BE->getBody();
5473 PropParentMap = nullptr;
5474 // block literal on rhs of a property-dot-sytax assignment
5475 // must be replaced by its synthesize ast so getRewrittenText
5476 // works as expected. In this case, what actually ends up on RHS
5477 // is the blockTranscribed which is the helper function for the
5478 // block literal; as in: self.c = ^() {[ace ARR];};
5479 bool saveDisableReplaceStmt = DisableReplaceStmt;
5480 DisableReplaceStmt = false;
5481 RewriteFunctionBodyOrGlobalInitializer(BE->getBody());
5482 DisableReplaceStmt = saveDisableReplaceStmt;
5483 CurrentBody = SaveCurrentBody;
5484 PropParentMap = nullptr;
5485 ImportedLocalExternalDecls.clear();
5486 // Now we snarf the rewritten text and stash it away for later use.
5487 std::string Str = Rewrite.getRewrittenText(BE->getSourceRange());
5488 RewrittenBlockExprs[BE] = Str;
5489
5490 Stmt *blockTranscribed = SynthBlockInitExpr(BE, InnerBlockDeclRefs);
5491
5492 //blockTranscribed->dump();
5493 ReplaceStmt(S, blockTranscribed);
5494 return blockTranscribed;
5495 }
5496 // Handle specific things.
5497 if (ObjCEncodeExpr *AtEncode
16.1
'AtEncode' is null
= dyn_cast<ObjCEncodeExpr>(S))
16
Assuming 'S' is not a 'ObjCEncodeExpr'
17
Taking false branch
5498 return RewriteAtEncode(AtEncode);
5499
5500 if (ObjCSelectorExpr *AtSelector
18.1
'AtSelector' is null
= dyn_cast<ObjCSelectorExpr>(S))
18
Assuming 'S' is not a 'ObjCSelectorExpr'
19
Taking false branch
5501 return RewriteAtSelector(AtSelector);
5502
5503 if (ObjCStringLiteral *AtString
20.1
'AtString' is null
= dyn_cast<ObjCStringLiteral>(S))
20
Assuming 'S' is not a 'ObjCStringLiteral'
21
Taking false branch
5504 return RewriteObjCStringLiteral(AtString);
5505
5506 if (ObjCBoolLiteralExpr *BoolLitExpr
22.1
'BoolLitExpr' is null
= dyn_cast<ObjCBoolLiteralExpr>(S))
22
Assuming 'S' is not a 'ObjCBoolLiteralExpr'
23
Taking false branch
5507 return RewriteObjCBoolLiteralExpr(BoolLitExpr);
5508
5509 if (ObjCBoxedExpr *BoxedExpr
24.1
'BoxedExpr' is non-null
= dyn_cast<ObjCBoxedExpr>(S))
24
Assuming 'S' is a 'ObjCBoxedExpr'
25
Taking true branch
5510 return RewriteObjCBoxedExpr(BoxedExpr);
26
Calling 'RewriteModernObjC::RewriteObjCBoxedExpr'
5511
5512 if (ObjCArrayLiteral *ArrayLitExpr = dyn_cast<ObjCArrayLiteral>(S))
5513 return RewriteObjCArrayLiteralExpr(ArrayLitExpr);
5514
5515 if (ObjCDictionaryLiteral *DictionaryLitExpr =
5516 dyn_cast<ObjCDictionaryLiteral>(S))
5517 return RewriteObjCDictionaryLiteralExpr(DictionaryLitExpr);
5518
5519 if (ObjCMessageExpr *MessExpr = dyn_cast<ObjCMessageExpr>(S)) {
5520#if 0
5521 // Before we rewrite it, put the original message expression in a comment.
5522 SourceLocation startLoc = MessExpr->getBeginLoc();
5523 SourceLocation endLoc = MessExpr->getEndLoc();
5524
5525 const char *startBuf = SM->getCharacterData(startLoc);
5526 const char *endBuf = SM->getCharacterData(endLoc);
5527
5528 std::string messString;
5529 messString += "// ";
5530 messString.append(startBuf, endBuf-startBuf+1);
5531 messString += "\n";
5532
5533 // FIXME: Missing definition of
5534 // InsertText(clang::SourceLocation, char const*, unsigned int).
5535 // InsertText(startLoc, messString);
5536 // Tried this, but it didn't work either...
5537 // ReplaceText(startLoc, 0, messString.c_str(), messString.size());
5538#endif
5539 return RewriteMessageExpr(MessExpr);
5540 }
5541
5542 if (ObjCAutoreleasePoolStmt *StmtAutoRelease =
5543 dyn_cast<ObjCAutoreleasePoolStmt>(S)) {
5544 return RewriteObjCAutoreleasePoolStmt(StmtAutoRelease);
5545 }
5546
5547 if (ObjCAtTryStmt *StmtTry = dyn_cast<ObjCAtTryStmt>(S))
5548 return RewriteObjCTryStmt(StmtTry);
5549
5550 if (ObjCAtSynchronizedStmt *StmtTry = dyn_cast<ObjCAtSynchronizedStmt>(S))
5551 return RewriteObjCSynchronizedStmt(StmtTry);
5552
5553 if (ObjCAtThrowStmt *StmtThrow = dyn_cast<ObjCAtThrowStmt>(S))
5554 return RewriteObjCThrowStmt(StmtThrow);
5555
5556 if (ObjCProtocolExpr *ProtocolExp = dyn_cast<ObjCProtocolExpr>(S))
5557 return RewriteObjCProtocolExpr(ProtocolExp);
5558
5559 if (ObjCForCollectionStmt *StmtForCollection =
5560 dyn_cast<ObjCForCollectionStmt>(S))
5561 return RewriteObjCForCollectionStmt(StmtForCollection,
5562 OrigStmtRange.getEnd());
5563 if (BreakStmt *StmtBreakStmt =
5564 dyn_cast<BreakStmt>(S))
5565 return RewriteBreakStmt(StmtBreakStmt);
5566 if (ContinueStmt *StmtContinueStmt =
5567 dyn_cast<ContinueStmt>(S))
5568 return RewriteContinueStmt(StmtContinueStmt);
5569
5570 // Need to check for protocol refs (id <P>, Foo <P> *) in variable decls
5571 // and cast exprs.
5572 if (DeclStmt *DS = dyn_cast<DeclStmt>(S)) {
5573 // FIXME: What we're doing here is modifying the type-specifier that
5574 // precedes the first Decl. In the future the DeclGroup should have
5575 // a separate type-specifier that we can rewrite.
5576 // NOTE: We need to avoid rewriting the DeclStmt if it is within
5577 // the context of an ObjCForCollectionStmt. For example:
5578 // NSArray *someArray;
5579 // for (id <FooProtocol> index in someArray) ;
5580 // This is because RewriteObjCForCollectionStmt() does textual rewriting
5581 // and it depends on the original text locations/positions.
5582 if (Stmts.empty() || !IsDeclStmtInForeachHeader(DS))
5583 RewriteObjCQualifiedInterfaceTypes(*DS->decl_begin());
5584
5585 // Blocks rewrite rules.
5586 for (DeclStmt::decl_iterator DI = DS->decl_begin(), DE = DS->decl_end();
5587 DI != DE; ++DI) {
5588 Decl *SD = *DI;
5589 if (ValueDecl *ND = dyn_cast<ValueDecl>(SD)) {
5590 if (isTopLevelBlockPointerType(ND->getType()))
5591 RewriteBlockPointerDecl(ND);
5592 else if (ND->getType()->isFunctionPointerType())
5593 CheckFunctionPointerDecl(ND->getType(), ND);
5594 if (VarDecl *VD = dyn_cast<VarDecl>(SD)) {
5595 if (VD->hasAttr<BlocksAttr>()) {
5596 static unsigned uniqueByrefDeclCount = 0;
5597 assert(!BlockByRefDeclNo.count(ND) &&((!BlockByRefDeclNo.count(ND) && "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl"
) ? static_cast<void> (0) : __assert_fail ("!BlockByRefDeclNo.count(ND) && \"RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5598, __PRETTY_FUNCTION__))
5598 "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl")((!BlockByRefDeclNo.count(ND) && "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl"
) ? static_cast<void> (0) : __assert_fail ("!BlockByRefDeclNo.count(ND) && \"RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5598, __PRETTY_FUNCTION__))
;
5599 BlockByRefDeclNo[ND] = uniqueByrefDeclCount++;
5600 RewriteByRefVar(VD, (DI == DS->decl_begin()), ((DI+1) == DE));
5601 }
5602 else
5603 RewriteTypeOfDecl(VD);
5604 }
5605 }
5606 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(SD)) {
5607 if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
5608 RewriteBlockPointerDecl(TD);
5609 else if (TD->getUnderlyingType()->isFunctionPointerType())
5610 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
5611 }
5612 }
5613 }
5614
5615 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S))
5616 RewriteObjCQualifiedInterfaceTypes(CE);
5617
5618 if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
5619 isa<DoStmt>(S) || isa<ForStmt>(S)) {
5620 assert(!Stmts.empty() && "Statement stack is empty")((!Stmts.empty() && "Statement stack is empty") ? static_cast
<void> (0) : __assert_fail ("!Stmts.empty() && \"Statement stack is empty\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5620, __PRETTY_FUNCTION__))
;
5621 assert ((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) ||(((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>
(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt
>(Stmts.back())) && "Statement stack mismatch") ? static_cast
<void> (0) : __assert_fail ("(isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back())) && \"Statement stack mismatch\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5623, __PRETTY_FUNCTION__))
5622 isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back()))(((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>
(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt
>(Stmts.back())) && "Statement stack mismatch") ? static_cast
<void> (0) : __assert_fail ("(isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back())) && \"Statement stack mismatch\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5623, __PRETTY_FUNCTION__))
5623 && "Statement stack mismatch")(((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>
(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt
>(Stmts.back())) && "Statement stack mismatch") ? static_cast
<void> (0) : __assert_fail ("(isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back())) && \"Statement stack mismatch\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5623, __PRETTY_FUNCTION__))
;
5624 Stmts.pop_back();
5625 }
5626 // Handle blocks rewriting.
5627 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
5628 ValueDecl *VD = DRE->getDecl();
5629 if (VD->hasAttr<BlocksAttr>())
5630 return RewriteBlockDeclRefExpr(DRE);
5631 if (HasLocalVariableExternalStorage(VD))
5632 return RewriteLocalVariableExternalStorage(DRE);
5633 }
5634
5635 if (CallExpr *CE = dyn_cast<CallExpr>(S)) {
5636 if (CE->getCallee()->getType()->isBlockPointerType()) {
5637 Stmt *BlockCall = SynthesizeBlockCall(CE, CE->getCallee());
5638 ReplaceStmt(S, BlockCall);
5639 return BlockCall;
5640 }
5641 }
5642 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S)) {
5643 RewriteCastExpr(CE);
5644 }
5645 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
5646 RewriteImplicitCastObjCExpr(ICE);
5647 }
5648#if 0
5649
5650 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
5651 CastExpr *Replacement = new (Context) CastExpr(ICE->getType(),
5652 ICE->getSubExpr(),
5653 SourceLocation());
5654 // Get the new text.
5655 std::string SStr;
5656 llvm::raw_string_ostream Buf(SStr);
5657 Replacement->printPretty(Buf);
5658 const std::string &Str = Buf.str();
5659
5660 printf("CAST = %s\n", &Str[0]);
5661 InsertText(ICE->getSubExpr()->getBeginLoc(), Str);
5662 delete S;
5663 return Replacement;
5664 }
5665#endif
5666 // Return this stmt unmodified.
5667 return S;
5668}
5669
5670void RewriteModernObjC::RewriteRecordBody(RecordDecl *RD) {
5671 for (auto *FD : RD->fields()) {
5672 if (isTopLevelBlockPointerType(FD->getType()))
5673 RewriteBlockPointerDecl(FD);
5674 if (FD->getType()->isObjCQualifiedIdType() ||
5675 FD->getType()->isObjCQualifiedInterfaceType())
5676 RewriteObjCQualifiedInterfaceTypes(FD);
5677 }
5678}
5679
5680/// HandleDeclInMainFile - This is called for each top-level decl defined in the
5681/// main file of the input.
5682void RewriteModernObjC::HandleDeclInMainFile(Decl *D) {
5683 switch (D->getKind()) {
5684 case Decl::Function: {
5685 FunctionDecl *FD = cast<FunctionDecl>(D);
5686 if (FD->isOverloadedOperator())
5687 return;
5688
5689 // Since function prototypes don't have ParmDecl's, we check the function
5690 // prototype. This enables us to rewrite function declarations and
5691 // definitions using the same code.
5692 RewriteBlocksInFunctionProtoType(FD->getType(), FD);
5693
5694 if (!FD->isThisDeclarationADefinition())
5695 break;
5696
5697 // FIXME: If this should support Obj-C++, support CXXTryStmt
5698 if (CompoundStmt *Body = dyn_cast_or_null<CompoundStmt>(FD->getBody())) {
5699 CurFunctionDef = FD;
5700 CurrentBody = Body;
5701 Body =
5702 cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
5703 FD->setBody(Body);
5704 CurrentBody = nullptr;
5705 if (PropParentMap) {
5706 delete PropParentMap;
5707 PropParentMap = nullptr;
5708 }
5709 // This synthesizes and inserts the block "impl" struct, invoke function,
5710 // and any copy/dispose helper functions.
5711 InsertBlockLiteralsWithinFunction(FD);
5712 RewriteLineDirective(D);
5713 CurFunctionDef = nullptr;
5714 }
5715 break;
5716 }
5717 case Decl::ObjCMethod: {
5718 ObjCMethodDecl *MD = cast<ObjCMethodDecl>(D);
5719 if (CompoundStmt *Body = MD->getCompoundBody()) {
5720 CurMethodDef = MD;
5721 CurrentBody = Body;
5722 Body =
5723 cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
5724 MD->setBody(Body);
5725 CurrentBody = nullptr;
5726 if (PropParentMap) {
5727 delete PropParentMap;
5728 PropParentMap = nullptr;
5729 }
5730 InsertBlockLiteralsWithinMethod(MD);
5731 RewriteLineDirective(D);
5732 CurMethodDef = nullptr;
5733 }
5734 break;
5735 }
5736 case Decl::ObjCImplementation: {
5737 ObjCImplementationDecl *CI = cast<ObjCImplementationDecl>(D);
5738 ClassImplementation.push_back(CI);
5739 break;
5740 }
5741 case Decl::ObjCCategoryImpl: {
5742 ObjCCategoryImplDecl *CI = cast<ObjCCategoryImplDecl>(D);
5743 CategoryImplementation.push_back(CI);
5744 break;
5745 }
5746 case Decl::Var: {
5747 VarDecl *VD = cast<VarDecl>(D);
5748 RewriteObjCQualifiedInterfaceTypes(VD);
5749 if (isTopLevelBlockPointerType(VD->getType()))
5750 RewriteBlockPointerDecl(VD);
5751 else if (VD->getType()->isFunctionPointerType()) {
5752 CheckFunctionPointerDecl(VD->getType(), VD);
5753 if (VD->getInit()) {
5754 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
5755 RewriteCastExpr(CE);
5756 }
5757 }
5758 } else if (VD->getType()->isRecordType()) {
5759 RecordDecl *RD = VD->getType()->castAs<RecordType>()->getDecl();
5760 if (RD->isCompleteDefinition())
5761 RewriteRecordBody(RD);
5762 }
5763 if (VD->getInit()) {
5764 GlobalVarDecl = VD;
5765 CurrentBody = VD->getInit();
5766 RewriteFunctionBodyOrGlobalInitializer(VD->getInit());
5767 CurrentBody = nullptr;
5768 if (PropParentMap) {
5769 delete PropParentMap;
5770 PropParentMap = nullptr;
5771 }
5772 SynthesizeBlockLiterals(VD->getTypeSpecStartLoc(), VD->getName());
5773 GlobalVarDecl = nullptr;
5774
5775 // This is needed for blocks.
5776 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
5777 RewriteCastExpr(CE);
5778 }
5779 }
5780 break;
5781 }
5782 case Decl::TypeAlias:
5783 case Decl::Typedef: {
5784 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(D)) {
5785 if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
5786 RewriteBlockPointerDecl(TD);
5787 else if (TD->getUnderlyingType()->isFunctionPointerType())
5788 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
5789 else
5790 RewriteObjCQualifiedInterfaceTypes(TD);
5791 }
5792 break;
5793 }
5794 case Decl::CXXRecord:
5795 case Decl::Record: {
5796 RecordDecl *RD = cast<RecordDecl>(D);
5797 if (RD->isCompleteDefinition())
5798 RewriteRecordBody(RD);
5799 break;
5800 }
5801 default:
5802 break;
5803 }
5804 // Nothing yet.
5805}
5806
5807/// Write_ProtocolExprReferencedMetadata - This routine writer out the
5808/// protocol reference symbols in the for of:
5809/// struct _protocol_t *PROTOCOL_REF = &PROTOCOL_METADATA.
5810static void Write_ProtocolExprReferencedMetadata(ASTContext *Context,
5811 ObjCProtocolDecl *PDecl,
5812 std::string &Result) {
5813 // Also output .objc_protorefs$B section and its meta-data.
5814 if (Context->getLangOpts().MicrosoftExt)
5815 Result += "static ";
5816 Result += "struct _protocol_t *";
5817 Result += "_OBJC_PROTOCOL_REFERENCE_$_";
5818 Result += PDecl->getNameAsString();
5819 Result += " = &";
5820 Result += "_OBJC_PROTOCOL_"; Result += PDecl->getNameAsString();
5821 Result += ";\n";
5822}
5823
5824void RewriteModernObjC::HandleTranslationUnit(ASTContext &C) {
5825 if (Diags.hasErrorOccurred())
5826 return;
5827
5828 RewriteInclude();
5829
5830 for (unsigned i = 0, e = FunctionDefinitionsSeen.size(); i < e; i++) {
5831 // translation of function bodies were postponed until all class and
5832 // their extensions and implementations are seen. This is because, we
5833 // cannot build grouping structs for bitfields until they are all seen.
5834 FunctionDecl *FDecl = FunctionDefinitionsSeen[i];
5835 HandleTopLevelSingleDecl(FDecl);
5836 }
5837
5838 // Here's a great place to add any extra declarations that may be needed.
5839 // Write out meta data for each @protocol(<expr>).
5840 for (ObjCProtocolDecl *ProtDecl : ProtocolExprDecls) {
5841 RewriteObjCProtocolMetaData(ProtDecl, Preamble);
5842 Write_ProtocolExprReferencedMetadata(Context, ProtDecl, Preamble);
5843 }
5844
5845 InsertText(SM->getLocForStartOfFile(MainFileID), Preamble, false);
5846
5847 if (ClassImplementation.size() || CategoryImplementation.size())
5848 RewriteImplementations();
5849
5850 for (unsigned i = 0, e = ObjCInterfacesSeen.size(); i < e; i++) {
5851 ObjCInterfaceDecl *CDecl = ObjCInterfacesSeen[i];
5852 // Write struct declaration for the class matching its ivar declarations.
5853 // Note that for modern abi, this is postponed until the end of TU
5854 // because class extensions and the implementation might declare their own
5855 // private ivars.
5856 RewriteInterfaceDecl(CDecl);
5857 }
5858
5859 // Get the buffer corresponding to MainFileID. If we haven't changed it, then
5860 // we are done.
5861 if (const RewriteBuffer *RewriteBuf =
5862 Rewrite.getRewriteBufferFor(MainFileID)) {
5863 //printf("Changed:\n");
5864 *OutFile << std::string(RewriteBuf->begin(), RewriteBuf->end());
5865 } else {
5866 llvm::errs() << "No changes\n";
5867 }
5868
5869 if (ClassImplementation.size() || CategoryImplementation.size() ||
5870 ProtocolExprDecls.size()) {
5871 // Rewrite Objective-c meta data*
5872 std::string ResultStr;
5873 RewriteMetaDataIntoBuffer(ResultStr);
5874 // Emit metadata.
5875 *OutFile << ResultStr;
5876 }
5877 // Emit ImageInfo;
5878 {
5879 std::string ResultStr;
5880 WriteImageInfo(ResultStr);
5881 *OutFile << ResultStr;
5882 }
5883 OutFile->flush();
5884}
5885
5886void RewriteModernObjC::Initialize(ASTContext &context) {
5887 InitializeCommon(context);
5888
5889 Preamble += "#ifndef __OBJC2__\n";
5890 Preamble += "#define __OBJC2__\n";
5891 Preamble += "#endif\n";
5892
5893 // declaring objc_selector outside the parameter list removes a silly
5894 // scope related warning...
5895 if (IsHeader)
5896 Preamble = "#pragma once\n";
5897 Preamble += "struct objc_selector; struct objc_class;\n";
5898 Preamble += "struct __rw_objc_super { \n\tstruct objc_object *object; ";
5899 Preamble += "\n\tstruct objc_object *superClass; ";
5900 // Add a constructor for creating temporary objects.
5901 Preamble += "\n\t__rw_objc_super(struct objc_object *o, struct objc_object *s) ";
5902 Preamble += ": object(o), superClass(s) {} ";
5903 Preamble += "\n};\n";
5904
5905 if (LangOpts.MicrosoftExt) {
5906 // Define all sections using syntax that makes sense.
5907 // These are currently generated.
5908 Preamble += "\n#pragma section(\".objc_classlist$B\", long, read, write)\n";
5909 Preamble += "#pragma section(\".objc_catlist$B\", long, read, write)\n";
5910 Preamble += "#pragma section(\".objc_imageinfo$B\", long, read, write)\n";
5911 Preamble += "#pragma section(\".objc_nlclslist$B\", long, read, write)\n";
5912 Preamble += "#pragma section(\".objc_nlcatlist$B\", long, read, write)\n";
5913 // These are generated but not necessary for functionality.
5914 Preamble += "#pragma section(\".cat_cls_meth$B\", long, read, write)\n";
5915 Preamble += "#pragma section(\".inst_meth$B\", long, read, write)\n";
5916 Preamble += "#pragma section(\".cls_meth$B\", long, read, write)\n";
5917 Preamble += "#pragma section(\".objc_ivar$B\", long, read, write)\n";
5918
5919 // These need be generated for performance. Currently they are not,
5920 // using API calls instead.
5921 Preamble += "#pragma section(\".objc_selrefs$B\", long, read, write)\n";
5922 Preamble += "#pragma section(\".objc_classrefs$B\", long, read, write)\n";
5923 Preamble += "#pragma section(\".objc_superrefs$B\", long, read, write)\n";
5924
5925 }
5926 Preamble += "#ifndef _REWRITER_typedef_Protocol\n";
5927 Preamble += "typedef struct objc_object Protocol;\n";
5928 Preamble += "#define _REWRITER_typedef_Protocol\n";
5929 Preamble += "#endif\n";
5930 if (LangOpts.MicrosoftExt) {
5931 Preamble += "#define __OBJC_RW_DLLIMPORT extern \"C\" __declspec(dllimport)\n";
5932 Preamble += "#define __OBJC_RW_STATICIMPORT extern \"C\"\n";
5933 }
5934 else
5935 Preamble += "#define __OBJC_RW_DLLIMPORT extern\n";
5936
5937 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend(void);\n";
5938 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSendSuper(void);\n";
5939 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend_stret(void);\n";
5940 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSendSuper_stret(void);\n";