| //===--- RewriteObjC.cpp - Playground for the code rewriter ---------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // Hacks and fun related to the code rewriter. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "ASTConsumers.h" |
| #include "clang/Rewrite/Rewriter.h" |
| #include "clang/AST/AST.h" |
| #include "clang/AST/ASTConsumer.h" |
| #include "clang/AST/TranslationUnit.h" |
| #include "clang/Basic/SourceManager.h" |
| #include "clang/Basic/IdentifierTable.h" |
| #include "clang/Basic/Diagnostic.h" |
| #include "clang/Lex/Lexer.h" |
| #include "llvm/ADT/StringExtras.h" |
| #include "llvm/ADT/SmallPtrSet.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "llvm/Support/CommandLine.h" |
| #include "llvm/Support/Streams.h" |
| #include "llvm/System/Path.h" |
| #include <sstream> |
| #include <fstream> |
| using namespace clang; |
| using llvm::utostr; |
| |
| static llvm::cl::opt<bool> |
| SilenceRewriteMacroWarning("Wno-rewrite-macros", llvm::cl::init(false), |
| llvm::cl::desc("Silence ObjC rewriting warnings")); |
| |
| namespace { |
| class RewriteObjC : public ASTConsumer { |
| Rewriter Rewrite; |
| Diagnostic &Diags; |
| const LangOptions &LangOpts; |
| unsigned RewriteFailedDiag; |
| |
| ASTContext *Context; |
| SourceManager *SM; |
| TranslationUnitDecl *TUDecl; |
| unsigned MainFileID; |
| const char *MainFileStart, *MainFileEnd; |
| SourceLocation LastIncLoc; |
| |
| llvm::SmallVector<ObjCImplementationDecl *, 8> ClassImplementation; |
| llvm::SmallVector<ObjCCategoryImplDecl *, 8> CategoryImplementation; |
| llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCSynthesizedStructs; |
| llvm::SmallPtrSet<ObjCProtocolDecl*, 8> ObjCSynthesizedProtocols; |
| llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCForwardDecls; |
| llvm::DenseMap<ObjCMethodDecl*, std::string> MethodInternalNames; |
| llvm::SmallVector<Stmt *, 32> Stmts; |
| llvm::SmallVector<int, 8> ObjCBcLabelNo; |
| llvm::SmallVector<const RecordType *, 8> EncodingRecordTypes; |
| |
| unsigned NumObjCStringLiterals; |
| |
| FunctionDecl *MsgSendFunctionDecl; |
| FunctionDecl *MsgSendSuperFunctionDecl; |
| FunctionDecl *MsgSendStretFunctionDecl; |
| FunctionDecl *MsgSendSuperStretFunctionDecl; |
| FunctionDecl *MsgSendFpretFunctionDecl; |
| FunctionDecl *GetClassFunctionDecl; |
| FunctionDecl *GetMetaClassFunctionDecl; |
| FunctionDecl *SelGetUidFunctionDecl; |
| FunctionDecl *CFStringFunctionDecl; |
| FunctionDecl *GetProtocolFunctionDecl; |
| FunctionDecl *SuperContructorFunctionDecl; |
| |
| // ObjC string constant support. |
| VarDecl *ConstantStringClassReference; |
| RecordDecl *NSStringRecord; |
| |
| // ObjC foreach break/continue generation support. |
| int BcLabelCount; |
| |
| // Needed for super. |
| ObjCMethodDecl *CurMethodDecl; |
| RecordDecl *SuperStructDecl; |
| RecordDecl *ConstantStringDecl; |
| |
| // Needed for header files being rewritten |
| bool IsHeader; |
| |
| std::string InFileName; |
| std::string OutFileName; |
| |
| std::string Preamble; |
| |
| static const int OBJC_ABI_VERSION =7 ; |
| public: |
| virtual void Initialize(ASTContext &context); |
| |
| virtual void InitializeTU(TranslationUnit &TU) { |
| TU.SetOwnsDecls(false); |
| Initialize(TU.getContext()); |
| } |
| |
| |
| // Top Level Driver code. |
| virtual void HandleTopLevelDecl(Decl *D); |
| void HandleDeclInMainFile(Decl *D); |
| RewriteObjC(std::string inFile, std::string outFile, |
| Diagnostic &D, const LangOptions &LOpts); |
| ~RewriteObjC(); |
| |
| void ReplaceStmt(Stmt *Old, Stmt *New) { |
| // If replacement succeeded or warning disabled return with no warning. |
| if (!Rewrite.ReplaceStmt(Old, New) || SilenceRewriteMacroWarning) |
| return; |
| |
| SourceRange Range = Old->getSourceRange(); |
| Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag, |
| 0, 0, &Range, 1); |
| } |
| |
| void InsertText(SourceLocation Loc, const char *StrData, unsigned StrLen, |
| bool InsertAfter = true) { |
| // If insertion succeeded or warning disabled return with no warning. |
| if (!Rewrite.InsertText(Loc, StrData, StrLen, InsertAfter) || |
| SilenceRewriteMacroWarning) |
| return; |
| |
| Diags.Report(Context->getFullLoc(Loc), RewriteFailedDiag); |
| } |
| |
| void RemoveText(SourceLocation Loc, unsigned StrLen) { |
| // If removal succeeded or warning disabled return with no warning. |
| if (!Rewrite.RemoveText(Loc, StrLen) || SilenceRewriteMacroWarning) |
| return; |
| |
| Diags.Report(Context->getFullLoc(Loc), RewriteFailedDiag); |
| } |
| |
| void ReplaceText(SourceLocation Start, unsigned OrigLength, |
| const char *NewStr, unsigned NewLength) { |
| // If removal succeeded or warning disabled return with no warning. |
| if (!Rewrite.ReplaceText(Start, OrigLength, NewStr, NewLength) || |
| SilenceRewriteMacroWarning) |
| return; |
| |
| Diags.Report(Context->getFullLoc(Start), RewriteFailedDiag); |
| } |
| |
| // Syntactic Rewriting. |
| void RewritePrologue(SourceLocation Loc); |
| void RewriteInclude(); |
| void RewriteTabs(); |
| void RewriteForwardClassDecl(ObjCClassDecl *Dcl); |
| void RewriteInterfaceDecl(ObjCInterfaceDecl *Dcl); |
| void RewriteImplementationDecl(NamedDecl *Dcl); |
| void RewriteObjCMethodDecl(ObjCMethodDecl *MDecl, std::string &ResultStr); |
| void RewriteCategoryDecl(ObjCCategoryDecl *Dcl); |
| void RewriteProtocolDecl(ObjCProtocolDecl *Dcl); |
| void RewriteForwardProtocolDecl(ObjCForwardProtocolDecl *Dcl); |
| void RewriteMethodDeclaration(ObjCMethodDecl *Method); |
| void RewriteProperties(unsigned nProperties, ObjCPropertyDecl **Properties); |
| void RewriteFunctionDecl(FunctionDecl *FD); |
| void RewriteObjCQualifiedInterfaceTypes(Decl *Dcl); |
| bool needToScanForQualifiers(QualType T); |
| ObjCInterfaceDecl *isSuperReceiver(Expr *recExpr); |
| QualType getSuperStructType(); |
| QualType getConstantStringStructType(); |
| bool BufferContainsPPDirectives(const char *startBuf, const char *endBuf); |
| |
| // Expression Rewriting. |
| Stmt *RewriteFunctionBodyOrGlobalInitializer(Stmt *S); |
| Stmt *RewriteAtEncode(ObjCEncodeExpr *Exp); |
| Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV, SourceLocation OrigStart); |
| Stmt *RewriteAtSelector(ObjCSelectorExpr *Exp); |
| Stmt *RewriteMessageExpr(ObjCMessageExpr *Exp); |
| Stmt *RewriteObjCStringLiteral(ObjCStringLiteral *Exp); |
| Stmt *RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp); |
| Stmt *RewriteObjCTryStmt(ObjCAtTryStmt *S); |
| Stmt *RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S); |
| Stmt *RewriteObjCCatchStmt(ObjCAtCatchStmt *S); |
| Stmt *RewriteObjCFinallyStmt(ObjCAtFinallyStmt *S); |
| Stmt *RewriteObjCThrowStmt(ObjCAtThrowStmt *S); |
| Stmt *RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S, |
| SourceLocation OrigEnd); |
| CallExpr *SynthesizeCallToFunctionDecl(FunctionDecl *FD, |
| Expr **args, unsigned nargs); |
| Stmt *SynthMessageExpr(ObjCMessageExpr *Exp); |
| Stmt *RewriteBreakStmt(BreakStmt *S); |
| Stmt *RewriteContinueStmt(ContinueStmt *S); |
| void SynthCountByEnumWithState(std::string &buf); |
| |
| void SynthMsgSendFunctionDecl(); |
| void SynthMsgSendSuperFunctionDecl(); |
| void SynthMsgSendStretFunctionDecl(); |
| void SynthMsgSendFpretFunctionDecl(); |
| void SynthMsgSendSuperStretFunctionDecl(); |
| void SynthGetClassFunctionDecl(); |
| void SynthGetMetaClassFunctionDecl(); |
| void SynthSelGetUidFunctionDecl(); |
| void SynthGetProtocolFunctionDecl(); |
| void SynthSuperContructorFunctionDecl(); |
| |
| // Metadata emission. |
| void RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl, |
| std::string &Result); |
| |
| void RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *CDecl, |
| std::string &Result); |
| |
| typedef ObjCCategoryImplDecl::instmeth_iterator instmeth_iterator; |
| void RewriteObjCMethodsMetaData(instmeth_iterator MethodBegin, |
| instmeth_iterator MethodEnd, |
| bool IsInstanceMethod, |
| const char *prefix, |
| const char *ClassName, |
| std::string &Result); |
| |
| void RewriteObjCProtocolsMetaData(const ObjCList<ObjCProtocolDecl> |
| &Protocols, |
| const char *prefix, |
| const char *ClassName, |
| std::string &Result); |
| void SynthesizeObjCInternalStruct(ObjCInterfaceDecl *CDecl, |
| std::string &Result); |
| void SynthesizeIvarOffsetComputation(ObjCImplementationDecl *IDecl, |
| ObjCIvarDecl *ivar, |
| std::string &Result); |
| void RewriteImplementations(std::string &Result); |
| }; |
| } |
| |
| static bool IsHeaderFile(const std::string &Filename) { |
| std::string::size_type DotPos = Filename.rfind('.'); |
| |
| if (DotPos == std::string::npos) { |
| // no file extension |
| return false; |
| } |
| |
| std::string Ext = std::string(Filename.begin()+DotPos+1, Filename.end()); |
| // C header: .h |
| // C++ header: .hh or .H; |
| return Ext == "h" || Ext == "hh" || Ext == "H"; |
| } |
| |
| RewriteObjC::RewriteObjC(std::string inFile, std::string outFile, |
| Diagnostic &D, const LangOptions &LOpts) |
| : Diags(D), LangOpts(LOpts) { |
| IsHeader = IsHeaderFile(inFile); |
| InFileName = inFile; |
| OutFileName = outFile; |
| RewriteFailedDiag = Diags.getCustomDiagID(Diagnostic::Warning, |
| "rewriting sub-expression within a macro (may not be correct)"); |
| } |
| |
| ASTConsumer *clang::CreateCodeRewriterTest(const std::string& InFile, |
| const std::string& OutFile, |
| Diagnostic &Diags, |
| const LangOptions &LOpts) { |
| return new RewriteObjC(InFile, OutFile, Diags, LOpts); |
| } |
| |
| void RewriteObjC::Initialize(ASTContext &context) { |
| Context = &context; |
| SM = &Context->getSourceManager(); |
| TUDecl = Context->getTranslationUnitDecl(); |
| MsgSendFunctionDecl = 0; |
| MsgSendSuperFunctionDecl = 0; |
| MsgSendStretFunctionDecl = 0; |
| MsgSendSuperStretFunctionDecl = 0; |
| MsgSendFpretFunctionDecl = 0; |
| GetClassFunctionDecl = 0; |
| GetMetaClassFunctionDecl = 0; |
| SelGetUidFunctionDecl = 0; |
| CFStringFunctionDecl = 0; |
| GetProtocolFunctionDecl = 0; |
| ConstantStringClassReference = 0; |
| NSStringRecord = 0; |
| CurMethodDecl = 0; |
| SuperStructDecl = 0; |
| ConstantStringDecl = 0; |
| BcLabelCount = 0; |
| SuperContructorFunctionDecl = 0; |
| NumObjCStringLiterals = 0; |
| |
| // Get the ID and start/end of the main file. |
| MainFileID = SM->getMainFileID(); |
| const llvm::MemoryBuffer *MainBuf = SM->getBuffer(MainFileID); |
| MainFileStart = MainBuf->getBufferStart(); |
| MainFileEnd = MainBuf->getBufferEnd(); |
| |
| Rewrite.setSourceMgr(Context->getSourceManager()); |
| |
| // declaring objc_selector outside the parameter list removes a silly |
| // scope related warning... |
| if (IsHeader) |
| Preamble = "#pragma once\n"; |
| Preamble += "struct objc_selector; struct objc_class;\n"; |
| Preamble += "#ifndef OBJC_SUPER\n"; |
| Preamble += "struct objc_super { struct objc_object *object; "; |
| Preamble += "struct objc_object *superClass; "; |
| if (LangOpts.Microsoft) { |
| // Add a constructor for creating temporary objects. |
| Preamble += "objc_super(struct objc_object *o, struct objc_object *s) : "; |
| Preamble += "object(o), superClass(s) {} "; |
| } |
| Preamble += "};\n"; |
| Preamble += "#define OBJC_SUPER\n"; |
| Preamble += "#endif\n"; |
| Preamble += "#ifndef _REWRITER_typedef_Protocol\n"; |
| Preamble += "typedef struct objc_object Protocol;\n"; |
| Preamble += "#define _REWRITER_typedef_Protocol\n"; |
| Preamble += "#endif\n"; |
| if (LangOpts.Microsoft) |
| Preamble += "#define __OBJC_RW_EXTERN extern \"C\" __declspec(dllimport)\n"; |
| else |
| Preamble += "#define __OBJC_RW_EXTERN extern\n"; |
| Preamble += "__OBJC_RW_EXTERN struct objc_object *objc_msgSend"; |
| Preamble += "(struct objc_object *, struct objc_selector *, ...);\n"; |
| Preamble += "__OBJC_RW_EXTERN struct objc_object *objc_msgSendSuper"; |
| Preamble += "(struct objc_super *, struct objc_selector *, ...);\n"; |
| Preamble += "__OBJC_RW_EXTERN struct objc_object *objc_msgSend_stret"; |
| Preamble += "(struct objc_object *, struct objc_selector *, ...);\n"; |
| Preamble += "__OBJC_RW_EXTERN struct objc_object *objc_msgSendSuper_stret"; |
| Preamble += "(struct objc_super *, struct objc_selector *, ...);\n"; |
| Preamble += "__OBJC_RW_EXTERN double objc_msgSend_fpret"; |
| Preamble += "(struct objc_object *, struct objc_selector *, ...);\n"; |
| Preamble += "__OBJC_RW_EXTERN struct objc_object *objc_getClass"; |
| Preamble += "(const char *);\n"; |
| Preamble += "__OBJC_RW_EXTERN struct objc_object *objc_getMetaClass"; |
| Preamble += "(const char *);\n"; |
| Preamble += "__OBJC_RW_EXTERN void objc_exception_throw(struct objc_object *);\n"; |
| Preamble += "__OBJC_RW_EXTERN void objc_exception_try_enter(void *);\n"; |
| Preamble += "__OBJC_RW_EXTERN void objc_exception_try_exit(void *);\n"; |
| Preamble += "__OBJC_RW_EXTERN struct objc_object *objc_exception_extract(void *);\n"; |
| Preamble += "__OBJC_RW_EXTERN int objc_exception_match"; |
| Preamble += "(struct objc_class *, struct objc_object *);\n"; |
| // @synchronized hooks. |
| Preamble += "__OBJC_RW_EXTERN void objc_sync_enter(struct objc_object *);\n"; |
| Preamble += "__OBJC_RW_EXTERN void objc_sync_exit(struct objc_object *);\n"; |
| Preamble += "__OBJC_RW_EXTERN Protocol *objc_getProtocol(const char *);\n"; |
| Preamble += "#ifndef __FASTENUMERATIONSTATE\n"; |
| Preamble += "struct __objcFastEnumerationState {\n\t"; |
| Preamble += "unsigned long state;\n\t"; |
| Preamble += "void **itemsPtr;\n\t"; |
| Preamble += "unsigned long *mutationsPtr;\n\t"; |
| Preamble += "unsigned long extra[5];\n};\n"; |
| Preamble += "__OBJC_RW_EXTERN void objc_enumerationMutation(struct objc_object *);\n"; |
| Preamble += "#define __FASTENUMERATIONSTATE\n"; |
| Preamble += "#endif\n"; |
| Preamble += "#ifndef __NSCONSTANTSTRINGIMPL\n"; |
| Preamble += "struct __NSConstantStringImpl {\n"; |
| Preamble += " int *isa;\n"; |
| Preamble += " int flags;\n"; |
| Preamble += " char *str;\n"; |
| Preamble += " long length;\n"; |
| Preamble += "};\n"; |
| Preamble += "__OBJC_RW_EXTERN int __CFConstantStringClassReference[];\n"; |
| Preamble += "#define __NSCONSTANTSTRINGIMPL\n"; |
| Preamble += "#endif\n"; |
| if (LangOpts.Microsoft) { |
| Preamble += "#undef __OBJC_RW_EXTERN\n"; |
| Preamble += "#define __attribute__(X)\n"; |
| } |
| } |
| |
| |
| //===----------------------------------------------------------------------===// |
| // Top Level Driver Code |
| //===----------------------------------------------------------------------===// |
| |
| void RewriteObjC::HandleTopLevelDecl(Decl *D) { |
| // Two cases: either the decl could be in the main file, or it could be in a |
| // #included file. If the former, rewrite it now. If the later, check to see |
| // if we rewrote the #include/#import. |
| SourceLocation Loc = D->getLocation(); |
| Loc = SM->getLogicalLoc(Loc); |
| |
| // If this is for a builtin, ignore it. |
| if (Loc.isInvalid()) return; |
| |
| // Look for built-in declarations that we need to refer during the rewrite. |
| if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
| RewriteFunctionDecl(FD); |
| } else if (VarDecl *FVD = dyn_cast<VarDecl>(D)) { |
| // declared in <Foundation/NSString.h> |
| if (strcmp(FVD->getName(), "_NSConstantStringClassReference") == 0) { |
| ConstantStringClassReference = FVD; |
| return; |
| } |
| } else if (ObjCInterfaceDecl *MD = dyn_cast<ObjCInterfaceDecl>(D)) { |
| RewriteInterfaceDecl(MD); |
| } else if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(D)) { |
| RewriteCategoryDecl(CD); |
| } else if (ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D)) { |
| RewriteProtocolDecl(PD); |
| } else if (ObjCForwardProtocolDecl *FP = |
| dyn_cast<ObjCForwardProtocolDecl>(D)){ |
| RewriteForwardProtocolDecl(FP); |
| } |
| // If we have a decl in the main file, see if we should rewrite it. |
| if (SM->isFromMainFile(Loc)) |
| return HandleDeclInMainFile(D); |
| } |
| |
| /// HandleDeclInMainFile - This is called for each top-level decl defined in the |
| /// main file of the input. |
| void RewriteObjC::HandleDeclInMainFile(Decl *D) { |
| if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) |
| if (Stmt *Body = FD->getBody()) |
| FD->setBody(RewriteFunctionBodyOrGlobalInitializer(Body)); |
| |
| if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) { |
| if (Stmt *Body = MD->getBody()) { |
| //Body->dump(); |
| CurMethodDecl = MD; |
| MD->setBody(RewriteFunctionBodyOrGlobalInitializer(Body)); |
| CurMethodDecl = 0; |
| } |
| } |
| if (ObjCImplementationDecl *CI = dyn_cast<ObjCImplementationDecl>(D)) |
| ClassImplementation.push_back(CI); |
| else if (ObjCCategoryImplDecl *CI = dyn_cast<ObjCCategoryImplDecl>(D)) |
| CategoryImplementation.push_back(CI); |
| else if (ObjCClassDecl *CD = dyn_cast<ObjCClassDecl>(D)) |
| RewriteForwardClassDecl(CD); |
| else if (VarDecl *VD = dyn_cast<VarDecl>(D)) { |
| RewriteObjCQualifiedInterfaceTypes(VD); |
| if (VD->getInit()) |
| RewriteFunctionBodyOrGlobalInitializer(VD->getInit()); |
| } |
| // Nothing yet. |
| } |
| |
| RewriteObjC::~RewriteObjC() { |
| // Get the top-level buffer that this corresponds to. |
| |
| // Rewrite tabs if we care. |
| //RewriteTabs(); |
| |
| if (Diags.hasErrorOccurred()) |
| return; |
| |
| // Create the output file. |
| |
| std::ostream *OutFile; |
| if (OutFileName == "-") { |
| OutFile = llvm::cout.stream(); |
| } else if (!OutFileName.empty()) { |
| OutFile = new std::ofstream(OutFileName.c_str(), |
| std::ios_base::binary|std::ios_base::out); |
| } else if (InFileName == "-") { |
| OutFile = llvm::cout.stream(); |
| } else { |
| llvm::sys::Path Path(InFileName); |
| Path.eraseSuffix(); |
| Path.appendSuffix("cpp"); |
| OutFile = new std::ofstream(Path.toString().c_str(), |
| std::ios_base::binary|std::ios_base::out); |
| } |
| |
| RewriteInclude(); |
| |
| InsertText(SourceLocation::getFileLoc(MainFileID, 0), |
| Preamble.c_str(), Preamble.size(), false); |
| |
| // Rewrite Objective-c meta data* |
| std::string ResultStr; |
| RewriteImplementations(ResultStr); |
| |
| // Get the buffer corresponding to MainFileID. If we haven't changed it, then |
| // we are done. |
| if (const RewriteBuffer *RewriteBuf = |
| Rewrite.getRewriteBufferFor(MainFileID)) { |
| //printf("Changed:\n"); |
| *OutFile << std::string(RewriteBuf->begin(), RewriteBuf->end()); |
| } else { |
| fprintf(stderr, "No changes\n"); |
| } |
| // Emit metadata. |
| *OutFile << ResultStr; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Syntactic (non-AST) Rewriting Code |
| //===----------------------------------------------------------------------===// |
| |
| void RewriteObjC::RewriteInclude() { |
| SourceLocation LocStart = SourceLocation::getFileLoc(MainFileID, 0); |
| std::pair<const char*, const char*> MainBuf = SM->getBufferData(MainFileID); |
| const char *MainBufStart = MainBuf.first; |
| const char *MainBufEnd = MainBuf.second; |
| size_t ImportLen = strlen("import"); |
| size_t IncludeLen = strlen("include"); |
| |
| // Loop over the whole file, looking for includes. |
| for (const char *BufPtr = MainBufStart; BufPtr < MainBufEnd; ++BufPtr) { |
| if (*BufPtr == '#') { |
| if (++BufPtr == MainBufEnd) |
| return; |
| while (*BufPtr == ' ' || *BufPtr == '\t') |
| if (++BufPtr == MainBufEnd) |
| return; |
| if (!strncmp(BufPtr, "import", ImportLen)) { |
| // replace import with include |
| SourceLocation ImportLoc = |
| LocStart.getFileLocWithOffset(BufPtr-MainBufStart); |
| ReplaceText(ImportLoc, ImportLen, "include", IncludeLen); |
| BufPtr += ImportLen; |
| } |
| } |
| } |
| } |
| |
| void RewriteObjC::RewriteTabs() { |
| std::pair<const char*, const char*> MainBuf = SM->getBufferData(MainFileID); |
| const char *MainBufStart = MainBuf.first; |
| const char *MainBufEnd = MainBuf.second; |
| |
| // Loop over the whole file, looking for tabs. |
| for (const char *BufPtr = MainBufStart; BufPtr != MainBufEnd; ++BufPtr) { |
| if (*BufPtr != '\t') |
| continue; |
| |
| // Okay, we found a tab. This tab will turn into at least one character, |
| // but it depends on which 'virtual column' it is in. Compute that now. |
| unsigned VCol = 0; |
| while (BufPtr-VCol != MainBufStart && BufPtr[-VCol-1] != '\t' && |
| BufPtr[-VCol-1] != '\n' && BufPtr[-VCol-1] != '\r') |
| ++VCol; |
| |
| // Okay, now that we know the virtual column, we know how many spaces to |
| // insert. We assume 8-character tab-stops. |
| unsigned Spaces = 8-(VCol & 7); |
| |
| // Get the location of the tab. |
| SourceLocation TabLoc = |
| SourceLocation::getFileLoc(MainFileID, BufPtr-MainBufStart); |
| |
| // Rewrite the single tab character into a sequence of spaces. |
| ReplaceText(TabLoc, 1, " ", Spaces); |
| } |
| } |
| |
| |
| void RewriteObjC::RewriteForwardClassDecl(ObjCClassDecl *ClassDecl) { |
| int numDecls = ClassDecl->getNumForwardDecls(); |
| ObjCInterfaceDecl **ForwardDecls = ClassDecl->getForwardDecls(); |
| |
| // Get the start location and compute the semi location. |
| SourceLocation startLoc = ClassDecl->getLocation(); |
| const char *startBuf = SM->getCharacterData(startLoc); |
| const char *semiPtr = strchr(startBuf, ';'); |
| |
| // Translate to typedef's that forward reference structs with the same name |
| // as the class. As a convenience, we include the original declaration |
| // as a comment. |
| std::string typedefString; |
| typedefString += "// "; |
| typedefString.append(startBuf, semiPtr-startBuf+1); |
| typedefString += "\n"; |
| for (int i = 0; i < numDecls; i++) { |
| ObjCInterfaceDecl *ForwardDecl = ForwardDecls[i]; |
| typedefString += "#ifndef _REWRITER_typedef_"; |
| typedefString += ForwardDecl->getName(); |
| typedefString += "\n"; |
| typedefString += "#define _REWRITER_typedef_"; |
| typedefString += ForwardDecl->getName(); |
| typedefString += "\n"; |
| typedefString += "typedef struct objc_object "; |
| typedefString += ForwardDecl->getName(); |
| typedefString += ";\n#endif\n"; |
| } |
| |
| // Replace the @class with typedefs corresponding to the classes. |
| ReplaceText(startLoc, semiPtr-startBuf+1, |
| typedefString.c_str(), typedefString.size()); |
| } |
| |
| void RewriteObjC::RewriteMethodDeclaration(ObjCMethodDecl *Method) { |
| SourceLocation LocStart = Method->getLocStart(); |
| SourceLocation LocEnd = Method->getLocEnd(); |
| |
| if (SM->getLineNumber(LocEnd) > SM->getLineNumber(LocStart)) { |
| InsertText(LocStart, "/* ", 3); |
| ReplaceText(LocEnd, 1, ";*/ ", 4); |
| } else { |
| InsertText(LocStart, "// ", 3); |
| } |
| } |
| |
| void RewriteObjC::RewriteProperties(unsigned nProperties, ObjCPropertyDecl **Properties) |
| { |
| for (unsigned i = 0; i < nProperties; i++) { |
| ObjCPropertyDecl *Property = Properties[i]; |
| SourceLocation Loc = Property->getLocation(); |
| |
| ReplaceText(Loc, 0, "// ", 3); |
| |
| // FIXME: handle properties that are declared across multiple lines. |
| } |
| } |
| |
| void RewriteObjC::RewriteCategoryDecl(ObjCCategoryDecl *CatDecl) { |
| SourceLocation LocStart = CatDecl->getLocStart(); |
| |
| // FIXME: handle category headers that are declared across multiple lines. |
| ReplaceText(LocStart, 0, "// ", 3); |
| |
| for (ObjCCategoryDecl::instmeth_iterator I = CatDecl->instmeth_begin(), |
| E = CatDecl->instmeth_end(); I != E; ++I) |
| RewriteMethodDeclaration(*I); |
| for (ObjCCategoryDecl::classmeth_iterator I = CatDecl->classmeth_begin(), |
| E = CatDecl->classmeth_end(); I != E; ++I) |
| RewriteMethodDeclaration(*I); |
| |
| // Lastly, comment out the @end. |
| ReplaceText(CatDecl->getAtEndLoc(), 0, "// ", 3); |
| } |
| |
| void RewriteObjC::RewriteProtocolDecl(ObjCProtocolDecl *PDecl) { |
| std::pair<const char*, const char*> MainBuf = SM->getBufferData(MainFileID); |
| |
| SourceLocation LocStart = PDecl->getLocStart(); |
| |
| // FIXME: handle protocol headers that are declared across multiple lines. |
| ReplaceText(LocStart, 0, "// ", 3); |
| |
| for (ObjCProtocolDecl::instmeth_iterator I = PDecl->instmeth_begin(), |
| E = PDecl->instmeth_end(); I != E; ++I) |
| RewriteMethodDeclaration(*I); |
| for (ObjCProtocolDecl::classmeth_iterator I = PDecl->classmeth_begin(), |
| E = PDecl->classmeth_end(); I != E; ++I) |
| RewriteMethodDeclaration(*I); |
| |
| // Lastly, comment out the @end. |
| SourceLocation LocEnd = PDecl->getAtEndLoc(); |
| ReplaceText(LocEnd, 0, "// ", 3); |
| |
| // Must comment out @optional/@required |
| const char *startBuf = SM->getCharacterData(LocStart); |
| const char *endBuf = SM->getCharacterData(LocEnd); |
| for (const char *p = startBuf; p < endBuf; p++) { |
| if (*p == '@' && !strncmp(p+1, "optional", strlen("optional"))) { |
| std::string CommentedOptional = "/* @optional */"; |
| SourceLocation OptionalLoc = LocStart.getFileLocWithOffset(p-startBuf); |
| ReplaceText(OptionalLoc, strlen("@optional"), |
| CommentedOptional.c_str(), CommentedOptional.size()); |
| |
| } |
| else if (*p == '@' && !strncmp(p+1, "required", strlen("required"))) { |
| std::string CommentedRequired = "/* @required */"; |
| SourceLocation OptionalLoc = LocStart.getFileLocWithOffset(p-startBuf); |
| ReplaceText(OptionalLoc, strlen("@required"), |
| CommentedRequired.c_str(), CommentedRequired.size()); |
| |
| } |
| } |
| } |
| |
| void RewriteObjC::RewriteForwardProtocolDecl(ObjCForwardProtocolDecl *PDecl) { |
| SourceLocation LocStart = PDecl->getLocation(); |
| if (LocStart.isInvalid()) |
| assert(false && "Invalid SourceLocation"); |
| // FIXME: handle forward protocol that are declared across multiple lines. |
| ReplaceText(LocStart, 0, "// ", 3); |
| } |
| |
| void RewriteObjC::RewriteObjCMethodDecl(ObjCMethodDecl *OMD, |
| std::string &ResultStr) { |
| const FunctionType *FPRetType = 0; |
| ResultStr += "\nstatic "; |
| if (OMD->getResultType()->isObjCQualifiedIdType()) |
| ResultStr += "id"; |
| else if (OMD->getResultType()->isFunctionPointerType()) { |
| // needs special handling, since pointer-to-functions have special |
| // syntax (where a decaration models use). |
| QualType retType = OMD->getResultType(); |
| if (const PointerType* PT = retType->getAsPointerType()) { |
| QualType PointeeTy = PT->getPointeeType(); |
| if ((FPRetType = PointeeTy->getAsFunctionType())) { |
| ResultStr += FPRetType->getResultType().getAsString(); |
| ResultStr += "(*"; |
| } |
| } |
| } else |
| ResultStr += OMD->getResultType().getAsString(); |
| ResultStr += " "; |
| |
| // Unique method name |
| std::string NameStr; |
| |
| if (OMD->isInstance()) |
| NameStr += "_I_"; |
| else |
| NameStr += "_C_"; |
| |
| NameStr += OMD->getClassInterface()->getName(); |
| NameStr += "_"; |
| |
| NamedDecl *MethodContext = OMD->getMethodContext(); |
| if (ObjCCategoryImplDecl *CID = |
| dyn_cast<ObjCCategoryImplDecl>(MethodContext)) { |
| NameStr += CID->getName(); |
| NameStr += "_"; |
| } |
| // Append selector names, replacing ':' with '_' |
| if (OMD->getSelector().getName().find(':') == std::string::npos) |
| NameStr += OMD->getSelector().getName(); |
| else { |
| std::string selString = OMD->getSelector().getName(); |
| int len = selString.size(); |
| for (int i = 0; i < len; i++) |
| if (selString[i] == ':') |
| selString[i] = '_'; |
| NameStr += selString; |
| } |
| // Remember this name for metadata emission |
| MethodInternalNames[OMD] = NameStr; |
| ResultStr += NameStr; |
| |
| // Rewrite arguments |
| ResultStr += "("; |
| |
| // invisible arguments |
| if (OMD->isInstance()) { |
| QualType selfTy = Context->getObjCInterfaceType(OMD->getClassInterface()); |
| selfTy = Context->getPointerType(selfTy); |
| if (!LangOpts.Microsoft) { |
| if (ObjCSynthesizedStructs.count(OMD->getClassInterface())) |
| ResultStr += "struct "; |
| } |
| // When rewriting for Microsoft, explicitly omit the structure name. |
| ResultStr += OMD->getClassInterface()->getName(); |
| ResultStr += " *"; |
| } |
| else |
| ResultStr += Context->getObjCIdType().getAsString(); |
| |
| ResultStr += " self, "; |
| ResultStr += Context->getObjCSelType().getAsString(); |
| ResultStr += " _cmd"; |
| |
| // Method arguments. |
| for (unsigned i = 0; i < OMD->getNumParams(); i++) { |
| ParmVarDecl *PDecl = OMD->getParamDecl(i); |
| ResultStr += ", "; |
| if (PDecl->getType()->isObjCQualifiedIdType()) { |
| ResultStr += "id "; |
| ResultStr += PDecl->getName(); |
| } else { |
| std::string Name = PDecl->getName(); |
| PDecl->getType().getAsStringInternal(Name); |
| ResultStr += Name; |
| } |
| } |
| if (OMD->isVariadic()) |
| ResultStr += ", ..."; |
| ResultStr += ") "; |
| |
| if (FPRetType) { |
| ResultStr += ")"; // close the precedence "scope" for "*". |
| |
| // Now, emit the argument types (if any). |
| if (const FunctionTypeProto *FT = dyn_cast<FunctionTypeProto>(FPRetType)) { |
| ResultStr += "("; |
| for (unsigned i = 0, e = FT->getNumArgs(); i != e; ++i) { |
| if (i) ResultStr += ", "; |
| std::string ParamStr = FT->getArgType(i).getAsString(); |
| ResultStr += ParamStr; |
| } |
| if (FT->isVariadic()) { |
| if (FT->getNumArgs()) ResultStr += ", "; |
| ResultStr += "..."; |
| } |
| ResultStr += ")"; |
| } else { |
| ResultStr += "()"; |
| } |
| } |
| } |
| void RewriteObjC::RewriteImplementationDecl(NamedDecl *OID) { |
| ObjCImplementationDecl *IMD = dyn_cast<ObjCImplementationDecl>(OID); |
| ObjCCategoryImplDecl *CID = dyn_cast<ObjCCategoryImplDecl>(OID); |
| |
| if (IMD) |
| InsertText(IMD->getLocStart(), "// ", 3); |
| else |
| InsertText(CID->getLocStart(), "// ", 3); |
| |
| for (ObjCCategoryImplDecl::instmeth_iterator |
| I = IMD ? IMD->instmeth_begin() : CID->instmeth_begin(), |
| E = IMD ? IMD->instmeth_end() : CID->instmeth_end(); I != E; ++I) { |
| std::string ResultStr; |
| ObjCMethodDecl *OMD = *I; |
| RewriteObjCMethodDecl(OMD, ResultStr); |
| SourceLocation LocStart = OMD->getLocStart(); |
| SourceLocation LocEnd = OMD->getBody()->getLocStart(); |
| |
| const char *startBuf = SM->getCharacterData(LocStart); |
| const char *endBuf = SM->getCharacterData(LocEnd); |
| ReplaceText(LocStart, endBuf-startBuf, |
| ResultStr.c_str(), ResultStr.size()); |
| } |
| |
| for (ObjCCategoryImplDecl::classmeth_iterator |
| I = IMD ? IMD->classmeth_begin() : CID->classmeth_begin(), |
| E = IMD ? IMD->classmeth_end() : CID->classmeth_end(); I != E; ++I) { |
| std::string ResultStr; |
| ObjCMethodDecl *OMD = *I; |
| RewriteObjCMethodDecl(OMD, ResultStr); |
| SourceLocation LocStart = OMD->getLocStart(); |
| SourceLocation LocEnd = OMD->getBody()->getLocStart(); |
| |
| const char *startBuf = SM->getCharacterData(LocStart); |
| const char *endBuf = SM->getCharacterData(LocEnd); |
| ReplaceText(LocStart, endBuf-startBuf, |
| ResultStr.c_str(), ResultStr.size()); |
| } |
| if (IMD) |
| InsertText(IMD->getLocEnd(), "// ", 3); |
| else |
| InsertText(CID->getLocEnd(), "// ", 3); |
| } |
| |
| void RewriteObjC::RewriteInterfaceDecl(ObjCInterfaceDecl *ClassDecl) { |
| std::string ResultStr; |
| if (!ObjCForwardDecls.count(ClassDecl)) { |
| // we haven't seen a forward decl - generate a typedef. |
| ResultStr = "#ifndef _REWRITER_typedef_"; |
| ResultStr += ClassDecl->getName(); |
| ResultStr += "\n"; |
| ResultStr += "#define _REWRITER_typedef_"; |
| ResultStr += ClassDecl->getName(); |
| ResultStr += "\n"; |
| ResultStr += "typedef struct objc_object "; |
| ResultStr += ClassDecl->getName(); |
| ResultStr += ";\n#endif\n"; |
| // Mark this typedef as having been generated. |
| ObjCForwardDecls.insert(ClassDecl); |
| } |
| SynthesizeObjCInternalStruct(ClassDecl, ResultStr); |
| |
| RewriteProperties(ClassDecl->getNumPropertyDecl(), |
| ClassDecl->getPropertyDecl()); |
| for (ObjCInterfaceDecl::instmeth_iterator I = ClassDecl->instmeth_begin(), |
| E = ClassDecl->instmeth_end(); I != E; ++I) |
| RewriteMethodDeclaration(*I); |
| for (ObjCInterfaceDecl::classmeth_iterator I = ClassDecl->classmeth_begin(), |
| E = ClassDecl->classmeth_end(); I != E; ++I) |
| RewriteMethodDeclaration(*I); |
| |
| // Lastly, comment out the @end. |
| ReplaceText(ClassDecl->getAtEndLoc(), 0, "// ", 3); |
| } |
| |
| Stmt *RewriteObjC::RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV, |
| SourceLocation OrigStart) { |
| ObjCIvarDecl *D = IV->getDecl(); |
| if (CurMethodDecl) { |
| if (const PointerType *pType = IV->getBase()->getType()->getAsPointerType()) { |
| ObjCInterfaceType *iFaceDecl = dyn_cast<ObjCInterfaceType>(pType->getPointeeType()); |
| // lookup which class implements the instance variable. |
| ObjCInterfaceDecl *clsDeclared = 0; |
| iFaceDecl->getDecl()->lookupInstanceVariable(D->getIdentifier(), clsDeclared); |
| assert(clsDeclared && "RewriteObjCIvarRefExpr(): Can't find class"); |
| |
| // Synthesize an explicit cast to gain access to the ivar. |
| std::string RecName = clsDeclared->getIdentifier()->getName(); |
| RecName += "_IMPL"; |
| IdentifierInfo *II = &Context->Idents.get(RecName.c_str()); |
| RecordDecl *RD = RecordDecl::Create(*Context, TagDecl::TK_struct, TUDecl, |
| SourceLocation(), II, 0); |
| assert(RD && "RewriteObjCIvarRefExpr(): Can't find RecordDecl"); |
| QualType castT = Context->getPointerType(Context->getTagDeclType(RD)); |
| CastExpr *castExpr = new CastExpr(castT, IV->getBase(), SourceLocation()); |
| // Don't forget the parens to enforce the proper binding. |
| ParenExpr *PE = new ParenExpr(IV->getBase()->getLocStart(), |
| IV->getBase()->getLocEnd(), |
| castExpr); |
| if (IV->isFreeIvar() && |
| CurMethodDecl->getClassInterface() == iFaceDecl->getDecl()) { |
| MemberExpr *ME = new MemberExpr(PE, true, D, IV->getLocation(), |
| D->getType()); |
| ReplaceStmt(IV, ME); |
| delete IV; |
| return ME; |
| } |
| |
| ReplaceStmt(IV->getBase(), PE); |
| // Cannot delete IV->getBase(), since PE points to it. |
| // Replace the old base with the cast. This is important when doing |
| // embedded rewrites. For example, [newInv->_container addObject:0]. |
| IV->setBase(PE); |
| return IV; |
| } |
| } else { // we are outside a method. |
| assert(!IV->isFreeIvar() && "Cannot have a free standing ivar outside a method"); |
| |
| // Explicit ivar refs need to have a cast inserted. |
| // FIXME: consider sharing some of this code with the code above. |
| if (const PointerType *pType = IV->getBase()->getType()->getAsPointerType()) { |
| ObjCInterfaceType *iFaceDecl = dyn_cast<ObjCInterfaceType>(pType->getPointeeType()); |
| // lookup which class implements the instance variable. |
| ObjCInterfaceDecl *clsDeclared = 0; |
| iFaceDecl->getDecl()->lookupInstanceVariable(D->getIdentifier(), clsDeclared); |
| assert(clsDeclared && "RewriteObjCIvarRefExpr(): Can't find class"); |
| |
| // Synthesize an explicit cast to gain access to the ivar. |
| std::string RecName = clsDeclared->getIdentifier()->getName(); |
| RecName += "_IMPL"; |
| IdentifierInfo *II = &Context->Idents.get(RecName.c_str()); |
| RecordDecl *RD = RecordDecl::Create(*Context, TagDecl::TK_struct, TUDecl, |
| SourceLocation(), II, 0); |
| assert(RD && "RewriteObjCIvarRefExpr(): Can't find RecordDecl"); |
| QualType castT = Context->getPointerType(Context->getTagDeclType(RD)); |
| CastExpr *castExpr = new CastExpr(castT, IV->getBase(), SourceLocation()); |
| // Don't forget the parens to enforce the proper binding. |
| ParenExpr *PE = new ParenExpr(IV->getBase()->getLocStart(), |
| IV->getBase()->getLocEnd(), castExpr); |
| ReplaceStmt(IV->getBase(), PE); |
| // Cannot delete IV->getBase(), since PE points to it. |
| // Replace the old base with the cast. This is important when doing |
| // embedded rewrites. For example, [newInv->_container addObject:0]. |
| IV->setBase(PE); |
| return IV; |
| } |
| } |
| return IV; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Function Body / Expression rewriting |
| //===----------------------------------------------------------------------===// |
| |
| Stmt *RewriteObjC::RewriteFunctionBodyOrGlobalInitializer(Stmt *S) { |
| if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) || |
| isa<DoStmt>(S) || isa<ForStmt>(S)) |
| Stmts.push_back(S); |
| else if (isa<ObjCForCollectionStmt>(S)) { |
| Stmts.push_back(S); |
| ObjCBcLabelNo.push_back(++BcLabelCount); |
| } |
| |
| SourceRange OrigStmtRange = S->getSourceRange(); |
| |
| // Start by rewriting all children. |
| for (Stmt::child_iterator CI = S->child_begin(), E = S->child_end(); |
| CI != E; ++CI) |
| if (*CI) { |
| Stmt *newStmt = RewriteFunctionBodyOrGlobalInitializer(*CI); |
| if (newStmt) |
| *CI = newStmt; |
| } |
| |
| // Handle specific things. |
| if (ObjCEncodeExpr *AtEncode = dyn_cast<ObjCEncodeExpr>(S)) |
| return RewriteAtEncode(AtEncode); |
| |
| if (ObjCIvarRefExpr *IvarRefExpr = dyn_cast<ObjCIvarRefExpr>(S)) |
| return RewriteObjCIvarRefExpr(IvarRefExpr, OrigStmtRange.getBegin()); |
| |
| if (ObjCSelectorExpr *AtSelector = dyn_cast<ObjCSelectorExpr>(S)) |
| return RewriteAtSelector(AtSelector); |
| |
| if (ObjCStringLiteral *AtString = dyn_cast<ObjCStringLiteral>(S)) |
| return RewriteObjCStringLiteral(AtString); |
| |
| if (ObjCMessageExpr *MessExpr = dyn_cast<ObjCMessageExpr>(S)) { |
| // Before we rewrite it, put the original message expression in a comment. |
| SourceLocation startLoc = MessExpr->getLocStart(); |
| SourceLocation endLoc = MessExpr->getLocEnd(); |
| |
| const char *startBuf = SM->getCharacterData(startLoc); |
| const char *endBuf = SM->getCharacterData(endLoc); |
| |
| std::string messString; |
| messString += "// "; |
| messString.append(startBuf, endBuf-startBuf+1); |
| messString += "\n"; |
| |
| // FIXME: Missing definition of |
| // InsertText(clang::SourceLocation, char const*, unsigned int). |
| // InsertText(startLoc, messString.c_str(), messString.size()); |
| // Tried this, but it didn't work either... |
| // ReplaceText(startLoc, 0, messString.c_str(), messString.size()); |
| return RewriteMessageExpr(MessExpr); |
| } |
| |
| if (ObjCAtTryStmt *StmtTry = dyn_cast<ObjCAtTryStmt>(S)) |
| return RewriteObjCTryStmt(StmtTry); |
| |
| if (ObjCAtSynchronizedStmt *StmtTry = dyn_cast<ObjCAtSynchronizedStmt>(S)) |
| return RewriteObjCSynchronizedStmt(StmtTry); |
| |
| if (ObjCAtThrowStmt *StmtThrow = dyn_cast<ObjCAtThrowStmt>(S)) |
| return RewriteObjCThrowStmt(StmtThrow); |
| |
| if (ObjCProtocolExpr *ProtocolExp = dyn_cast<ObjCProtocolExpr>(S)) |
| return RewriteObjCProtocolExpr(ProtocolExp); |
| |
| if (ObjCForCollectionStmt *StmtForCollection = |
| dyn_cast<ObjCForCollectionStmt>(S)) |
| return RewriteObjCForCollectionStmt(StmtForCollection, |
| OrigStmtRange.getEnd()); |
| if (BreakStmt *StmtBreakStmt = |
| dyn_cast<BreakStmt>(S)) |
| return RewriteBreakStmt(StmtBreakStmt); |
| if (ContinueStmt *StmtContinueStmt = |
| dyn_cast<ContinueStmt>(S)) |
| return RewriteContinueStmt(StmtContinueStmt); |
| |
| if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) || |
| isa<DoStmt>(S) || isa<ForStmt>(S)) { |
| assert(!Stmts.empty() && "Statement stack is empty"); |
| assert ((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) || |
| isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back())) |
| && "Statement stack mismatch"); |
| Stmts.pop_back(); |
| } |
| #if 0 |
| if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) { |
| CastExpr *Replacement = new CastExpr(ICE->getType(), ICE->getSubExpr(), SourceLocation()); |
| // Get the new text. |
| std::ostringstream Buf; |
| Replacement->printPretty(Buf); |
| const std::string &Str = Buf.str(); |
| |
| printf("CAST = %s\n", &Str[0]); |
| InsertText(ICE->getSubExpr()->getLocStart(), &Str[0], Str.size()); |
| delete S; |
| return Replacement; |
| } |
| #endif |
| // Return this stmt unmodified. |
| return S; |
| } |
| |
| /// SynthCountByEnumWithState - To print: |
| /// ((unsigned int (*) |
| /// (id, SEL, struct __objcFastEnumerationState *, id *, unsigned int)) |
| /// (void *)objc_msgSend)((id)l_collection, |
| /// sel_registerName( |
| /// "countByEnumeratingWithState:objects:count:"), |
| /// &enumState, |
| /// (id *)items, (unsigned int)16) |
| /// |
| void RewriteObjC::SynthCountByEnumWithState(std::string &buf) { |
| buf += "((unsigned int (*) (id, SEL, struct __objcFastEnumerationState *, " |
| "id *, unsigned int))(void *)objc_msgSend)"; |
| buf += "\n\t\t"; |
| buf += "((id)l_collection,\n\t\t"; |
| buf += "sel_registerName(\"countByEnumeratingWithState:objects:count:\"),"; |
| buf += "\n\t\t"; |
| buf += "&enumState, " |
| "(id *)items, (unsigned int)16)"; |
| } |
| |
| /// RewriteBreakStmt - Rewrite for a break-stmt inside an ObjC2's foreach |
| /// statement to exit to its outer synthesized loop. |
| /// |
| Stmt *RewriteObjC::RewriteBreakStmt(BreakStmt *S) { |
| if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back())) |
| return S; |
| // replace break with goto __break_label |
| std::string buf; |
| |
| SourceLocation startLoc = S->getLocStart(); |
| buf = "goto __break_label_"; |
| buf += utostr(ObjCBcLabelNo.back()); |
| ReplaceText(startLoc, strlen("break"), buf.c_str(), buf.size()); |
| |
| return 0; |
| } |
| |
| /// RewriteContinueStmt - Rewrite for a continue-stmt inside an ObjC2's foreach |
| /// statement to continue with its inner synthesized loop. |
| /// |
| Stmt *RewriteObjC::RewriteContinueStmt(ContinueStmt *S) { |
| if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back())) |
| return S; |
| // replace continue with goto __continue_label |
| std::string buf; |
| |
| SourceLocation startLoc = S->getLocStart(); |
| buf = "goto __continue_label_"; |
| buf += utostr(ObjCBcLabelNo.back()); |
| ReplaceText(startLoc, strlen("continue"), buf.c_str(), buf.size()); |
| |
| return 0; |
| } |
| |
| /// RewriteObjCForCollectionStmt - Rewriter for ObjC2's foreach statement. |
| /// It rewrites: |
| /// for ( type elem in collection) { stmts; } |
| |
| /// Into: |
| /// { |
| /// type elem; |
| /// struct __objcFastEnumerationState enumState = { 0 }; |
| /// id items[16]; |
| /// id l_collection = (id)collection; |
| /// unsigned long limit = [l_collection countByEnumeratingWithState:&enumState |
| /// objects:items count:16]; |
| /// if (limit) { |
| /// unsigned long startMutations = *enumState.mutationsPtr; |
| /// do { |
| /// unsigned long counter = 0; |
| /// do { |
| /// if (startMutations != *enumState.mutationsPtr) |
| /// objc_enumerationMutation(l_collection); |
| /// elem = (type)enumState.itemsPtr[counter++]; |
| /// stmts; |
| /// __continue_label: ; |
| /// } while (counter < limit); |
| /// } while (limit = [l_collection countByEnumeratingWithState:&enumState |
| /// objects:items count:16]); |
| /// elem = nil; |
| /// __break_label: ; |
| /// } |
| /// else |
| /// elem = nil; |
| /// } |
| /// |
| Stmt *RewriteObjC::RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S, |
| SourceLocation OrigEnd) { |
| assert(!Stmts.empty() && "ObjCForCollectionStmt - Statement stack empty"); |
| assert(isa<ObjCForCollectionStmt>(Stmts.back()) && |
| "ObjCForCollectionStmt Statement stack mismatch"); |
| assert(!ObjCBcLabelNo.empty() && |
| "ObjCForCollectionStmt - Label No stack empty"); |
| |
| SourceLocation startLoc = S->getLocStart(); |
| const char *startBuf = SM->getCharacterData(startLoc); |
| const char *elementName; |
| std::string elementTypeAsString; |
| std::string buf; |
| buf = "\n{\n\t"; |
| if (DeclStmt *DS = dyn_cast<DeclStmt>(S->getElement())) { |
| // type elem; |
| QualType ElementType = cast<ValueDecl>(DS->getDecl())->getType(); |
| elementTypeAsString = ElementType.getAsString(); |
| buf += elementTypeAsString; |
| buf += " "; |
| elementName = DS->getDecl()->getName(); |
| buf += elementName; |
| buf += ";\n\t"; |
| } |
| else { |
| DeclRefExpr *DR = cast<DeclRefExpr>(S->getElement()); |
| elementName = DR->getDecl()->getName(); |
| elementTypeAsString = DR->getDecl()->getType().getAsString(); |
| } |
| |
| // struct __objcFastEnumerationState enumState = { 0 }; |
| buf += "struct __objcFastEnumerationState enumState = { 0 };\n\t"; |
| // id items[16]; |
| buf += "id items[16];\n\t"; |
| // id l_collection = (id) |
| buf += "id l_collection = (id)"; |
| // Find start location of 'collection' the hard way! |
| const char *startCollectionBuf = startBuf; |
| startCollectionBuf += 3; // skip 'for' |
| startCollectionBuf = strchr(startCollectionBuf, '('); |
| startCollectionBuf++; // skip '(' |
| // find 'in' and skip it. |
| while (*startCollectionBuf != ' ' || |
| *(startCollectionBuf+1) != 'i' || *(startCollectionBuf+2) != 'n' || |
| (*(startCollectionBuf+3) != ' ' && |
| *(startCollectionBuf+3) != '[' && *(startCollectionBuf+3) != '(')) |
| startCollectionBuf++; |
| startCollectionBuf += 3; |
| |
| // Replace: "for (type element in" with string constructed thus far. |
| ReplaceText(startLoc, startCollectionBuf - startBuf, |
| buf.c_str(), buf.size()); |
| // Replace ')' in for '(' type elem in collection ')' with ';' |
| SourceLocation rightParenLoc = S->getRParenLoc(); |
| const char *rparenBuf = SM->getCharacterData(rightParenLoc); |
| SourceLocation lparenLoc = startLoc.getFileLocWithOffset(rparenBuf-startBuf); |
| buf = ";\n\t"; |
| |
| // unsigned long limit = [l_collection countByEnumeratingWithState:&enumState |
| // objects:items count:16]; |
| // which is synthesized into: |
| // unsigned int limit = |
| // ((unsigned int (*) |
| // (id, SEL, struct __objcFastEnumerationState *, id *, unsigned int)) |
| // (void *)objc_msgSend)((id)l_collection, |
| // sel_registerName( |
| // "countByEnumeratingWithState:objects:count:"), |
| // (struct __objcFastEnumerationState *)&state, |
| // (id *)items, (unsigned int)16); |
| buf += "unsigned long limit =\n\t\t"; |
| SynthCountByEnumWithState(buf); |
| buf += ";\n\t"; |
| /// if (limit) { |
| /// unsigned long startMutations = *enumState.mutationsPtr; |
| /// do { |
| /// unsigned long counter = 0; |
| /// do { |
| /// if (startMutations != *enumState.mutationsPtr) |
| /// objc_enumerationMutation(l_collection); |
| /// elem = (type)enumState.itemsPtr[counter++]; |
| buf += "if (limit) {\n\t"; |
| buf += "unsigned long startMutations = *enumState.mutationsPtr;\n\t"; |
| buf += "do {\n\t\t"; |
| buf += "unsigned long counter = 0;\n\t\t"; |
| buf += "do {\n\t\t\t"; |
| buf += "if (startMutations != *enumState.mutationsPtr)\n\t\t\t\t"; |
| buf += "objc_enumerationMutation(l_collection);\n\t\t\t"; |
| buf += elementName; |
| buf += " = ("; |
| buf += elementTypeAsString; |
| buf += ")enumState.itemsPtr[counter++];"; |
| // Replace ')' in for '(' type elem in collection ')' with all of these. |
| ReplaceText(lparenLoc, 1, buf.c_str(), buf.size()); |
| |
| /// __continue_label: ; |
| /// } while (counter < limit); |
| /// } while (limit = [l_collection countByEnumeratingWithState:&enumState |
| /// objects:items count:16]); |
| /// elem = nil; |
| /// __break_label: ; |
| /// } |
| /// else |
| /// elem = nil; |
| /// } |
| /// |
| buf = ";\n\t"; |
| buf += "__continue_label_"; |
| buf += utostr(ObjCBcLabelNo.back()); |
| buf += ": ;"; |
| buf += "\n\t\t"; |
| buf += "} while (counter < limit);\n\t"; |
| buf += "} while (limit = "; |
| SynthCountByEnumWithState(buf); |
| buf += ");\n\t"; |
| buf += elementName; |
| buf += " = nil;\n\t"; |
| buf += "__break_label_"; |
| buf += utostr(ObjCBcLabelNo.back()); |
| buf += ": ;\n\t"; |
| buf += "}\n\t"; |
| buf += "else\n\t\t"; |
| buf += elementName; |
| buf += " = nil;\n"; |
| buf += "}\n"; |
| |
| // Insert all these *after* the statement body. |
| if (isa<CompoundStmt>(S->getBody())) { |
| SourceLocation endBodyLoc = OrigEnd.getFileLocWithOffset(1); |
| InsertText(endBodyLoc, buf.c_str(), buf.size()); |
| } else { |
| /* Need to treat single statements specially. For example: |
| * |
| * for (A *a in b) if (stuff()) break; |
| * for (A *a in b) xxxyy; |
| * |
| * The following code simply scans ahead to the semi to find the actual end. |
| */ |
| const char *stmtBuf = SM->getCharacterData(OrigEnd); |
| const char *semiBuf = strchr(stmtBuf, ';'); |
| assert(semiBuf && "Can't find ';'"); |
| SourceLocation endBodyLoc = OrigEnd.getFileLocWithOffset(semiBuf-stmtBuf+1); |
| InsertText(endBodyLoc, buf.c_str(), buf.size()); |
| } |
| Stmts.pop_back(); |
| ObjCBcLabelNo.pop_back(); |
| return 0; |
| } |
| |
| /// RewriteObjCSynchronizedStmt - |
| /// This routine rewrites @synchronized(expr) stmt; |
| /// into: |
| /// objc_sync_enter(expr); |
| /// @try stmt @finally { objc_sync_exit(expr); } |
| /// |
| Stmt *RewriteObjC::RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S) { |
| // Get the start location and compute the semi location. |
| SourceLocation startLoc = S->getLocStart(); |
| const char *startBuf = SM->getCharacterData(startLoc); |
| |
| assert((*startBuf == '@') && "bogus @synchronized location"); |
| |
| std::string buf; |
| buf = "objc_sync_enter"; |
| ReplaceText(startLoc, 13, buf.c_str(), buf.size()); |
| SourceLocation endLoc = S->getSynchExpr()->getLocEnd(); |
| const char *endBuf = SM->getCharacterData(endLoc); |
| endBuf++; |
| const char *rparenBuf = strchr(endBuf, ')'); |
| SourceLocation rparenLoc = startLoc.getFileLocWithOffset(rparenBuf-startBuf); |
| buf = ");\n"; |
| // declare a new scope with two variables, _stack and _rethrow. |
| buf += "/* @try scope begin */ \n{ struct _objc_exception_data {\n"; |
| buf += "int buf[18/*32-bit i386*/];\n"; |
| buf += "char *pointers[4];} _stack;\n"; |
| buf += "id volatile _rethrow = 0;\n"; |
| buf += "objc_exception_try_enter(&_stack);\n"; |
| buf += "if (!_setjmp(_stack.buf)) /* @try block continue */\n"; |
| ReplaceText(rparenLoc, 1, buf.c_str(), buf.size()); |
| startLoc = S->getSynchBody()->getLocEnd(); |
| startBuf = SM->getCharacterData(startLoc); |
| |
| assert((*startBuf == '}') && "bogus @try block"); |
| SourceLocation lastCurlyLoc = startLoc; |
| buf = "}\nelse {\n"; |
| buf += " _rethrow = objc_exception_extract(&_stack);\n"; |
| buf += " if (!_rethrow) objc_exception_try_exit(&_stack);\n"; |
| buf += " objc_sync_exit("; |
| std::ostringstream syncExprBuf; |
| S->getSynchExpr()->printPretty(syncExprBuf); |
| buf += syncExprBuf.str(); |
| buf += ");\n"; |
| buf += " if (_rethrow) objc_exception_throw(_rethrow);\n"; |
| buf += "}\n"; |
| buf += "}"; |
| |
| ReplaceText(lastCurlyLoc, 1, buf.c_str(), buf.size()); |
| return 0; |
| } |
| |
| Stmt *RewriteObjC::RewriteObjCTryStmt(ObjCAtTryStmt *S) { |
| // Get the start location and compute the semi location. |
| SourceLocation startLoc = S->getLocStart(); |
| const char *startBuf = SM->getCharacterData(startLoc); |
| |
| assert((*startBuf == '@') && "bogus @try location"); |
| |
| std::string buf; |
| // declare a new scope with two variables, _stack and _rethrow. |
| buf = "/* @try scope begin */ { struct _objc_exception_data {\n"; |
| buf += "int buf[18/*32-bit i386*/];\n"; |
| buf += "char *pointers[4];} _stack;\n"; |
| buf += "id volatile _rethrow = 0;\n"; |
| buf += "objc_exception_try_enter(&_stack);\n"; |
| buf += "if (!_setjmp(_stack.buf)) /* @try block continue */\n"; |
| |
| ReplaceText(startLoc, 4, buf.c_str(), buf.size()); |
| |
| startLoc = S->getTryBody()->getLocEnd(); |
| startBuf = SM->getCharacterData(startLoc); |
| |
| assert((*startBuf == '}') && "bogus @try block"); |
| |
| SourceLocation lastCurlyLoc = startLoc; |
| ObjCAtCatchStmt *catchList = S->getCatchStmts(); |
| if (catchList) { |
| startLoc = startLoc.getFileLocWithOffset(1); |
| buf = " /* @catch begin */ else {\n"; |
| buf += " id _caught = objc_exception_extract(&_stack);\n"; |
| buf += " objc_exception_try_enter (&_stack);\n"; |
| buf += " if (_setjmp(_stack.buf))\n"; |
| buf += " _rethrow = objc_exception_extract(&_stack);\n"; |
| buf += " else { /* @catch continue */"; |
| |
| InsertText(startLoc, buf.c_str(), buf.size()); |
| } |
| bool sawIdTypedCatch = false; |
| Stmt *lastCatchBody = 0; |
| while (catchList) { |
| Stmt *catchStmt = catchList->getCatchParamStmt(); |
| |
| if (catchList == S->getCatchStmts()) |
| buf = "if ("; // we are generating code for the first catch clause |
| else |
| buf = "else if ("; |
| startLoc = catchList->getLocStart(); |
| startBuf = SM->getCharacterData(startLoc); |
| |
| assert((*startBuf == '@') && "bogus @catch location"); |
| |
| const char *lParenLoc = strchr(startBuf, '('); |
| |
| if (catchList->hasEllipsis()) { |
| // Now rewrite the body... |
| lastCatchBody = catchList->getCatchBody(); |
| SourceLocation bodyLoc = lastCatchBody->getLocStart(); |
| const char *bodyBuf = SM->getCharacterData(bodyLoc); |
| assert(*SM->getCharacterData(catchList->getRParenLoc()) == ')' && |
| "bogus @catch paren location"); |
| assert((*bodyBuf == '{') && "bogus @catch body location"); |
| |
| buf += "1) { id _tmp = _caught;"; |
| Rewrite.ReplaceText(startLoc, bodyBuf-startBuf+1, |
| buf.c_str(), buf.size()); |
| } else if (DeclStmt *declStmt = dyn_cast<DeclStmt>(catchStmt)) { |
| QualType t = dyn_cast<ValueDecl>(declStmt->getDecl())->getType(); |
| if (t == Context->getObjCIdType()) { |
| buf += "1) { "; |
| ReplaceText(startLoc, lParenLoc-startBuf+1, buf.c_str(), buf.size()); |
| sawIdTypedCatch = true; |
| } else if (const PointerType *pType = t->getAsPointerType()) { |
| ObjCInterfaceType *cls; // Should be a pointer to a class. |
| |
| cls = dyn_cast<ObjCInterfaceType>(pType->getPointeeType().getTypePtr()); |
| if (cls) { |
| buf += "objc_exception_match((struct objc_class *)objc_getClass(\""; |
| buf += cls->getDecl()->getName(); |
| buf += "\"), (struct objc_object *)_caught)) { "; |
| ReplaceText(startLoc, lParenLoc-startBuf+1, buf.c_str(), buf.size()); |
| } |
| } |
| // Now rewrite the body... |
| lastCatchBody = catchList->getCatchBody(); |
| SourceLocation rParenLoc = catchList->getRParenLoc(); |
| SourceLocation bodyLoc = lastCatchBody->getLocStart(); |
| const char *bodyBuf = SM->getCharacterData(bodyLoc); |
| const char *rParenBuf = SM->getCharacterData(rParenLoc); |
| assert((*rParenBuf == ')') && "bogus @catch paren location"); |
| assert((*bodyBuf == '{') && "bogus @catch body location"); |
| |
| buf = " = _caught;"; |
| // Here we replace ") {" with "= _caught;" (which initializes and |
| // declares the @catch parameter). |
| ReplaceText(rParenLoc, bodyBuf-rParenBuf+1, buf.c_str(), buf.size()); |
| } else if (!isa<NullStmt>(catchStmt)) { |
| assert(false && "@catch rewrite bug"); |
| } |
| // make sure all the catch bodies get rewritten! |
| catchList = catchList->getNextCatchStmt(); |
| } |
| // Complete the catch list... |
| if (lastCatchBody) { |
| SourceLocation bodyLoc = lastCatchBody->getLocEnd(); |
| assert(*SM->getCharacterData(bodyLoc) == '}' && |
| "bogus @catch body location"); |
| bodyLoc = bodyLoc.getFileLocWithOffset(1); |
| buf = " } } /* @catch end */\n"; |
| |
| InsertText(bodyLoc, buf.c_str(), buf.size()); |
| |
| // Set lastCurlyLoc |
| lastCurlyLoc = lastCatchBody->getLocEnd(); |
| } |
| if (ObjCAtFinallyStmt *finalStmt = S->getFinallyStmt()) { |
| startLoc = finalStmt->getLocStart(); |
| startBuf = SM->getCharacterData(startLoc); |
| assert((*startBuf == '@') && "bogus @finally start"); |
| |
| buf = "/* @finally */"; |
| ReplaceText(startLoc, 8, buf.c_str(), buf.size()); |
| |
| Stmt *body = finalStmt->getFinallyBody(); |
| SourceLocation startLoc = body->getLocStart(); |
| SourceLocation endLoc = body->getLocEnd(); |
| assert(*SM->getCharacterData(startLoc) == '{' && |
| "bogus @finally body location"); |
| assert(*SM->getCharacterData(endLoc) == '}' && |
| "bogus @finally body location"); |
| |
| startLoc = startLoc.getFileLocWithOffset(1); |
| buf = " if (!_rethrow) objc_exception_try_exit(&_stack);\n"; |
| InsertText(startLoc, buf.c_str(), buf.size()); |
| endLoc = endLoc.getFileLocWithOffset(-1); |
| buf = " if (_rethrow) objc_exception_throw(_rethrow);\n"; |
| InsertText(endLoc, buf.c_str(), buf.size()); |
| |
| // Set lastCurlyLoc |
| lastCurlyLoc = body->getLocEnd(); |
| } |
| // Now emit the final closing curly brace... |
| lastCurlyLoc = lastCurlyLoc.getFileLocWithOffset(1); |
| buf = " } /* @try scope end */\n"; |
| InsertText(lastCurlyLoc, buf.c_str(), buf.size()); |
| return 0; |
| } |
| |
| Stmt *RewriteObjC::RewriteObjCCatchStmt(ObjCAtCatchStmt *S) { |
| return 0; |
| } |
| |
| Stmt *RewriteObjC::RewriteObjCFinallyStmt(ObjCAtFinallyStmt *S) { |
| return 0; |
| } |
| |
| // This can't be done with ReplaceStmt(S, ThrowExpr), since |
| // the throw expression is typically a message expression that's already |
| // been rewritten! (which implies the SourceLocation's are invalid). |
| Stmt *RewriteObjC::RewriteObjCThrowStmt(ObjCAtThrowStmt *S) { |
| // Get the start location and compute the semi location. |
| SourceLocation startLoc = S->getLocStart(); |
| const char *startBuf = SM->getCharacterData(startLoc); |
| |
| assert((*startBuf == '@') && "bogus @throw location"); |
| |
| std::string buf; |
| /* void objc_exception_throw(id) __attribute__((noreturn)); */ |
| if (S->getThrowExpr()) |
| buf = "objc_exception_throw("; |
| else // add an implicit argument |
| buf = "objc_exception_throw(_caught"; |
| ReplaceText(startLoc, 6, buf.c_str(), buf.size()); |
| const char *semiBuf = strchr(startBuf, ';'); |
| assert((*semiBuf == ';') && "@throw: can't find ';'"); |
| SourceLocation semiLoc = startLoc.getFileLocWithOffset(semiBuf-startBuf); |
| buf = ");"; |
| ReplaceText(semiLoc, 1, buf.c_str(), buf.size()); |
| return 0; |
| } |
| |
| Stmt *RewriteObjC::RewriteAtEncode(ObjCEncodeExpr *Exp) { |
| // Create a new string expression. |
| QualType StrType = Context->getPointerType(Context->CharTy); |
| std::string StrEncoding; |
| Context->getObjCEncodingForType(Exp->getEncodedType(), StrEncoding, |
| EncodingRecordTypes); |
| Expr *Replacement = new StringLiteral(StrEncoding.c_str(), |
| StrEncoding.length(), false, StrType, |
| SourceLocation(), SourceLocation()); |
| ReplaceStmt(Exp, Replacement); |
| |
| // Replace this subexpr in the parent. |
| delete Exp; |
| return Replacement; |
| } |
| |
| Stmt *RewriteObjC::RewriteAtSelector(ObjCSelectorExpr *Exp) { |
| assert(SelGetUidFunctionDecl && "Can't find sel_registerName() decl"); |
| // Create a call to sel_registerName("selName"). |
| llvm::SmallVector<Expr*, 8> SelExprs; |
| QualType argType = Context->getPointerType(Context->CharTy); |
| SelExprs.push_back(new StringLiteral(Exp->getSelector().getName().c_str(), |
| Exp->getSelector().getName().size(), |
| false, argType, SourceLocation(), |
| SourceLocation())); |
| CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl, |
| &SelExprs[0], SelExprs.size()); |
| ReplaceStmt(Exp, SelExp); |
| delete Exp; |
| return SelExp; |
| } |
| |
| CallExpr *RewriteObjC::SynthesizeCallToFunctionDecl( |
| FunctionDecl *FD, Expr **args, unsigned nargs) { |
| // Get the type, we will need to reference it in a couple spots. |
| QualType msgSendType = FD->getType(); |
| |
| // Create a reference to the objc_msgSend() declaration. |
| DeclRefExpr *DRE = new DeclRefExpr(FD, msgSendType, SourceLocation()); |
| |
| // Now, we cast the reference to a pointer to the objc_msgSend type. |
| QualType pToFunc = Context->getPointerType(msgSendType); |
| ImplicitCastExpr *ICE = new ImplicitCastExpr(pToFunc, DRE); |
| |
| const FunctionType *FT = msgSendType->getAsFunctionType(); |
| |
| return new CallExpr(ICE, args, nargs, FT->getResultType(), SourceLocation()); |
| } |
| |
| static bool scanForProtocolRefs(const char *startBuf, const char *endBuf, |
| const char *&startRef, const char *&endRef) { |
| while (startBuf < endBuf) { |
| if (*startBuf == '<') |
| startRef = startBuf; // mark the start. |
| if (*startBuf == '>') { |
| if (startRef && *startRef == '<') { |
| endRef = startBuf; // mark the end. |
| return true; |
| } |
| return false; |
| } |
| startBuf++; |
| } |
| return false; |
| } |
| |
| static void scanToNextArgument(const char *&argRef) { |
| int angle = 0; |
| while (*argRef != ')' && (*argRef != ',' || angle > 0)) { |
| if (*argRef == '<') |
| angle++; |
| else if (*argRef == '>') |
| angle--; |
| argRef++; |
| } |
| assert(angle == 0 && "scanToNextArgument - bad protocol type syntax"); |
| } |
| |
| bool RewriteObjC::needToScanForQualifiers(QualType T) { |
| |
| if (T->isObjCQualifiedIdType()) |
| return true; |
| |
| if (const PointerType *pType = T->getAsPointerType()) { |
| Type *pointeeType = pType->getPointeeType().getTypePtr(); |
| if (isa<ObjCQualifiedInterfaceType>(pointeeType)) |
| return true; // we have "Class <Protocol> *". |
| } |
| return false; |
| } |
| |
| void RewriteObjC::RewriteObjCQualifiedInterfaceTypes(Decl *Dcl) { |
| SourceLocation Loc; |
| QualType Type; |
| const FunctionTypeProto *proto = 0; |
| if (VarDecl *VD = dyn_cast<VarDecl>(Dcl)) { |
| Loc = VD->getLocation(); |
| Type = VD->getType(); |
| } |
| else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Dcl)) { |
| Loc = FD->getLocation(); |
| // Check for ObjC 'id' and class types that have been adorned with protocol |
| // information (id<p>, C<p>*). The protocol references need to be rewritten! |
| const FunctionType *funcType = FD->getType()->getAsFunctionType(); |
| assert(funcType && "missing function type"); |
| proto = dyn_cast<FunctionTypeProto>(funcType); |
| if (!proto) |
| return; |
| Type = proto->getResultType(); |
| } |
| else |
| return; |
| |
| if (needToScanForQualifiers(Type)) { |
| // Since types are unique, we need to scan the buffer. |
| |
| const char *endBuf = SM->getCharacterData(Loc); |
| const char *startBuf = endBuf; |
| while (*startBuf != ';' && *startBuf != '<' && startBuf != MainFileStart) |
| startBuf--; // scan backward (from the decl location) for return type. |
| const char *startRef = 0, *endRef = 0; |
| if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) { |
| // Get the locations of the startRef, endRef. |
| SourceLocation LessLoc = Loc.getFileLocWithOffset(startRef-endBuf); |
| SourceLocation GreaterLoc = Loc.getFileLocWithOffset(endRef-endBuf+1); |
| // Comment out the protocol references. |
| InsertText(LessLoc, "/*", 2); |
| InsertText(GreaterLoc, "*/", 2); |
| } |
| } |
| if (!proto) |
| return; // most likely, was a variable |
| // Now check arguments. |
| const char *startBuf = SM->getCharacterData(Loc); |
| const char *startFuncBuf = startBuf; |
| for (unsigned i = 0; i < proto->getNumArgs(); i++) { |
| if (needToScanForQualifiers(proto->getArgType(i))) { |
| // Since types are unique, we need to scan the buffer. |
| |
| const char *endBuf = startBuf; |
| // scan forward (from the decl location) for argument types. |
| scanToNextArgument(endBuf); |
| const char *startRef = 0, *endRef = 0; |
| if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) { |
| // Get the locations of the startRef, endRef. |
| SourceLocation LessLoc = |
| Loc.getFileLocWithOffset(startRef-startFuncBuf); |
| SourceLocation GreaterLoc = |
| Loc.getFileLocWithOffset(endRef-startFuncBuf+1); |
| // Comment out the protocol references. |
| InsertText(LessLoc, "/*", 2); |
| InsertText(GreaterLoc, "*/", 2); |
| } |
| startBuf = ++endBuf; |
| } |
| else { |
| while (*startBuf != ')' && *startBuf != ',') |
| startBuf++; // scan forward (from the decl location) for argument types. |
| startBuf++; |
| } |
| } |
| } |
| |
| // SynthSelGetUidFunctionDecl - SEL sel_registerName(const char *str); |
| void RewriteObjC::SynthSelGetUidFunctionDecl() { |
| IdentifierInfo *SelGetUidIdent = &Context->Idents.get("sel_registerName"); |
| llvm::SmallVector<QualType, 16> ArgTys; |
| ArgTys.push_back(Context->getPointerType( |
| Context->CharTy.getQualifiedType(QualType::Const))); |
| QualType getFuncType = Context->getFunctionType(Context->getObjCSelType(), |
| &ArgTys[0], ArgTys.size(), |
| false /*isVariadic*/); |
| SelGetUidFunctionDecl = FunctionDecl::Create(*Context, TUDecl, |
| SourceLocation(), |
| SelGetUidIdent, getFuncType, |
| FunctionDecl::Extern, false, 0); |
| } |
| |
| // SynthGetProtocolFunctionDecl - Protocol objc_getProtocol(const char *proto); |
| void RewriteObjC::SynthGetProtocolFunctionDecl() { |
| IdentifierInfo *SelGetProtoIdent = &Context->Idents.get("objc_getProtocol"); |
| llvm::SmallVector<QualType, 16> ArgTys; |
| ArgTys.push_back(Context->getPointerType( |
| Context->CharTy.getQualifiedType(QualType::Const))); |
| QualType getFuncType = Context->getFunctionType(Context->getObjCProtoType(), |
| &ArgTys[0], ArgTys.size(), |
| false /*isVariadic*/); |
| GetProtocolFunctionDecl = FunctionDecl::Create(*Context, TUDecl, |
| SourceLocation(), |
| SelGetProtoIdent, getFuncType, |
| FunctionDecl::Extern, false, 0); |
| } |
| |
| void RewriteObjC::RewriteFunctionDecl(FunctionDecl *FD) { |
| // declared in <objc/objc.h> |
| if (strcmp(FD->getName(), "sel_registerName") == 0) { |
| SelGetUidFunctionDecl = FD; |
| return; |
| } |
| RewriteObjCQualifiedInterfaceTypes(FD); |
| } |
| |
| // SynthSuperContructorFunctionDecl - id objc_super(id obj, id super); |
| void RewriteObjC::SynthSuperContructorFunctionDecl() { |
| if (SuperContructorFunctionDecl) |
| return; |
| IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_super"); |
| llvm::SmallVector<QualType, 16> ArgTys; |
| QualType argT = Context->getObjCIdType(); |
| assert(!argT.isNull() && "Can't find 'id' type"); |
| ArgTys.push_back(argT); |
| ArgTys.push_back(argT); |
| QualType msgSendType = Context->getFunctionType(Context->getObjCIdType(), |
| &ArgTys[0], ArgTys.size(), |
| false); |
| SuperContructorFunctionDecl = FunctionDecl::Create(*Context, TUDecl, |
| SourceLocation(), |
| msgSendIdent, msgSendType, |
| FunctionDecl::Extern, false, 0); |
| } |
| |
| // SynthMsgSendFunctionDecl - id objc_msgSend(id self, SEL op, ...); |
| void RewriteObjC::SynthMsgSendFunctionDecl() { |
| IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend"); |
| llvm::SmallVector<QualType, 16> ArgTys; |
| QualType argT = Context->getObjCIdType(); |
| assert(!argT.isNull() && "Can't find 'id' type"); |
| ArgTys.push_back(argT); |
| argT = Context->getObjCSelType(); |
| assert(!argT.isNull() && "Can't find 'SEL' type"); |
| ArgTys.push_back(argT); |
| QualType msgSendType = Context->getFunctionType(Context->getObjCIdType(), |
| &ArgTys[0], ArgTys.size(), |
| true /*isVariadic*/); |
| MsgSendFunctionDecl = FunctionDecl::Create(*Context, TUDecl, |
| SourceLocation(), |
| msgSendIdent, msgSendType, |
| FunctionDecl::Extern, false, 0); |
| } |
| |
| // SynthMsgSendSuperFunctionDecl - id objc_msgSendSuper(struct objc_super *, SEL op, ...); |
| void RewriteObjC::SynthMsgSendSuperFunctionDecl() { |
| IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSendSuper"); |
| llvm::SmallVector<QualType, 16> ArgTys; |
| RecordDecl *RD = RecordDecl::Create(*Context, TagDecl::TK_struct, TUDecl, |
| SourceLocation(), |
| &Context->Idents.get("objc_super"), 0); |
| QualType argT = Context->getPointerType(Context->getTagDeclType(RD)); |
| assert(!argT.isNull() && "Can't build 'struct objc_super *' type"); |
| ArgTys.push_back(argT); |
| argT = Context->getObjCSelType(); |
| assert(!argT.isNull() && "Can't find 'SEL' type"); |
| ArgTys.push_back(argT); |
| QualType msgSendType = Context->getFunctionType(Context->getObjCIdType(), |
| &ArgTys[0], ArgTys.size(), |
| true /*isVariadic*/); |
| MsgSendSuperFunctionDecl = FunctionDecl::Create(*Context, TUDecl, |
| SourceLocation(), |
| msgSendIdent, msgSendType, |
| FunctionDecl::Extern, false, 0); |
| } |
| |
| // SynthMsgSendStretFunctionDecl - id objc_msgSend_stret(id self, SEL op, ...); |
| void RewriteObjC::SynthMsgSendStretFunctionDecl() { |
| IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_stret"); |
| llvm::SmallVector<QualType, 16> ArgTys; |
| QualType argT = Context->getObjCIdType(); |
| assert(!argT.isNull() && "Can't find 'id' type"); |
| ArgTys.push_back(argT); |
| argT = Context->getObjCSelType(); |
| assert(!argT.isNull() && "Can't find 'SEL' type"); |
| ArgTys.push_back(argT); |
| QualType msgSendType = Context->getFunctionType(Context->getObjCIdType(), |
| &ArgTys[0], ArgTys.size(), |
| true /*isVariadic*/); |
| MsgSendStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl, |
| SourceLocation(), |
| msgSendIdent, msgSendType, |
| FunctionDecl::Extern, false, 0); |
| } |
| |
| // SynthMsgSendSuperStretFunctionDecl - |
| // id objc_msgSendSuper_stret(struct objc_super *, SEL op, ...); |
| void RewriteObjC::SynthMsgSendSuperStretFunctionDecl() { |
| IdentifierInfo *msgSendIdent = |
| &Context->Idents.get("objc_msgSendSuper_stret"); |
| llvm::SmallVector<QualType, 16> ArgTys; |
| RecordDecl *RD = RecordDecl::Create(*Context, TagDecl::TK_struct, TUDecl, |
| SourceLocation(), |
| &Context->Idents.get("objc_super"), 0); |
| QualType argT = Context->getPointerType(Context->getTagDeclType(RD)); |
| assert(!argT.isNull() && "Can't build 'struct objc_super *' type"); |
| ArgTys.push_back(argT); |
| argT = Context->getObjCSelType(); |
| assert(!argT.isNull() && "Can't find 'SEL' type"); |
| ArgTys.push_back(argT); |
| QualType msgSendType = Context->getFunctionType(Context->getObjCIdType(), |
| &ArgTys[0], ArgTys.size(), |
| true /*isVariadic*/); |
| MsgSendSuperStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl, |
| SourceLocation(), |
| msgSendIdent, msgSendType, |
| FunctionDecl::Extern, false, 0); |
| } |
| |
| // SynthMsgSendFpretFunctionDecl - double objc_msgSend_fpret(id self, SEL op, ...); |
| void RewriteObjC::SynthMsgSendFpretFunctionDecl() { |
| IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_fpret"); |
| llvm::SmallVector<QualType, 16> ArgTys; |
| QualType argT = Context->getObjCIdType(); |
| assert(!argT.isNull() && "Can't find 'id' type"); |
| ArgTys.push_back(argT); |
| argT = Context->getObjCSelType(); |
| assert(!argT.isNull() && "Can't find 'SEL' type"); |
| ArgTys.push_back(argT); |
| QualType msgSendType = Context->getFunctionType(Context->DoubleTy, |
| &ArgTys[0], ArgTys.size(), |
| true /*isVariadic*/); |
| MsgSendFpretFunctionDecl = FunctionDecl::Create(*Context, TUDecl, |
| SourceLocation(), |
| msgSendIdent, msgSendType, |
| FunctionDecl::Extern, false, 0); |
| } |
| |
| // SynthGetClassFunctionDecl - id objc_getClass(const char *name); |
| void RewriteObjC::SynthGetClassFunctionDecl() { |
| IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getClass"); |
| llvm::SmallVector<QualType, 16> ArgTys; |
| ArgTys.push_back(Context->getPointerType( |
| Context->CharTy.getQualifiedType(QualType::Const))); |
| QualType getClassType = Context->getFunctionType(Context->getObjCIdType(), |
| &ArgTys[0], ArgTys.size(), |
| false /*isVariadic*/); |
| GetClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl, |
| SourceLocation(), |
| getClassIdent, getClassType, |
| FunctionDecl::Extern, false, 0); |
| } |
| |
| // SynthGetMetaClassFunctionDecl - id objc_getClass(const char *name); |
| void RewriteObjC::SynthGetMetaClassFunctionDecl() { |
| IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getMetaClass"); |
| llvm::SmallVector<QualType, 16> ArgTys; |
| ArgTys.push_back(Context->getPointerType( |
| Context->CharTy.getQualifiedType(QualType::Const))); |
| QualType getClassType = Context->getFunctionType(Context->getObjCIdType(), |
| &ArgTys[0], ArgTys.size(), |
| false /*isVariadic*/); |
| GetMetaClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl, |
| SourceLocation(), |
| getClassIdent, getClassType, |
| FunctionDecl::Extern, false, 0); |
| } |
| |
| Stmt *RewriteObjC::RewriteObjCStringLiteral(ObjCStringLiteral *Exp) { |
| QualType strType = getConstantStringStructType(); |
| |
| std::string S = "__NSConstantStringImpl_"; |
| |
| std::string tmpName = InFileName; |
| unsigned i; |
| for (i=0; i < tmpName.length(); i++) { |
| char c = tmpName.at(i); |
| // replace any non alphanumeric characters with '_'. |
| if (!isalpha(c) && (c < '0' || c > '9')) |
| tmpName[i] = '_'; |
| } |
| S += tmpName; |
| S += "_"; |
| S += utostr(NumObjCStringLiterals++); |
| |
| Preamble += "static __NSConstantStringImpl " + S; |
| Preamble += " __attribute__ ((section (\"__DATA, __cfstring\"))) = {__CFConstantStringClassReference,"; |
| Preamble += "0x000007c8,"; // utf8_str |
| // The pretty printer for StringLiteral handles escape characters properly. |
| std::ostringstream prettyBuf; |
| Exp->getString()->printPretty(prettyBuf); |
| Preamble += prettyBuf.str(); |
| Preamble += ","; |
| // The minus 2 removes the begin/end double quotes. |
| Preamble += utostr(prettyBuf.str().size()-2) + "};\n"; |
| |
| VarDecl *NewVD = VarDecl::Create(*Context, TUDecl, SourceLocation(), |
| &Context->Idents.get(S.c_str()), strType, |
| VarDecl::Static, NULL); |
| DeclRefExpr *DRE = new DeclRefExpr(NewVD, strType, SourceLocation()); |
| Expr *Unop = new UnaryOperator(DRE, UnaryOperator::AddrOf, |
| Context->getPointerType(DRE->getType()), |
| SourceLocation()); |
| // cast to NSConstantString * |
| CastExpr *cast = new CastExpr(Exp->getType(), Unop, SourceLocation()); |
| ReplaceStmt(Exp, cast); |
| delete Exp; |
| return cast; |
| } |
| |
| ObjCInterfaceDecl *RewriteObjC::isSuperReceiver(Expr *recExpr) { |
| // check if we are sending a message to 'super' |
| if (!CurMethodDecl || !CurMethodDecl->isInstance()) return 0; |
| |
| if (PreDefinedExpr *PDE = dyn_cast<PreDefinedExpr>(recExpr)) |
| if (PDE->getIdentType() == PreDefinedExpr::ObjCSuper) { |
| const PointerType *PT = PDE->getType()->getAsPointerType(); |
| assert(PT); |
| ObjCInterfaceType *IT = cast<ObjCInterfaceType>(PT->getPointeeType()); |
| return IT->getDecl(); |
| } |
| return 0; |
| } |
| |
| // struct objc_super { struct objc_object *receiver; struct objc_class *super; }; |
| QualType RewriteObjC::getSuperStructType() { |
| if (!SuperStructDecl) { |
| SuperStructDecl = RecordDecl::Create(*Context, TagDecl::TK_struct, TUDecl, |
| SourceLocation(), |
| &Context->Idents.get("objc_super"), 0); |
| QualType FieldTypes[2]; |
| |
| // struct objc_object *receiver; |
| FieldTypes[0] = Context->getObjCIdType(); |
| // struct objc_class *super; |
| FieldTypes[1] = Context->getObjCClassType(); |
| // Create fields |
| FieldDecl *FieldDecls[2]; |
| |
| for (unsigned i = 0; i < 2; ++i) |
| FieldDecls[i] = FieldDecl::Create(*Context, SourceLocation(), 0, |
| FieldTypes[i]); |
| |
| SuperStructDecl->defineBody(FieldDecls, 4); |
| } |
| return Context->getTagDeclType(SuperStructDecl); |
| } |
| |
| QualType RewriteObjC::getConstantStringStructType() { |
| if (!ConstantStringDecl) { |
| ConstantStringDecl = RecordDecl::Create(*Context, TagDecl::TK_struct, TUDecl, |
| SourceLocation(), |
| &Context->Idents.get("__NSConstantStringImpl"), 0); |
| QualType FieldTypes[4]; |
| |
| // struct objc_object *receiver; |
| FieldTypes[0] = Context->getObjCIdType(); |
| // int flags; |
| FieldTypes[1] = Context->IntTy; |
| // char *str; |
| FieldTypes[2] = Context->getPointerType(Context->CharTy); |
| // long length; |
| FieldTypes[3] = Context->LongTy; |
| // Create fields |
| FieldDecl *FieldDecls[4]; |
| |
| for (unsigned i = 0; i < 4; ++i) |
| FieldDecls[i] = FieldDecl::Create(*Context, SourceLocation(), 0, |
| FieldTypes[i]); |
| |
| ConstantStringDecl->defineBody(FieldDecls, 4); |
| } |
| return Context->getTagDeclType(ConstantStringDecl); |
| } |
| |
| Stmt *RewriteObjC::SynthMessageExpr(ObjCMessageExpr *Exp) { |
| if (!SelGetUidFunctionDecl) |
| SynthSelGetUidFunctionDecl(); |
| if (!MsgSendFunctionDecl) |
| SynthMsgSendFunctionDecl(); |
| if (!MsgSendSuperFunctionDecl) |
| SynthMsgSendSuperFunctionDecl(); |
| if (!MsgSendStretFunctionDecl) |
| SynthMsgSendStretFunctionDecl(); |
| if (!MsgSendSuperStretFunctionDecl) |
| SynthMsgSendSuperStretFunctionDecl(); |
| if (!MsgSendFpretFunctionDecl) |
| SynthMsgSendFpretFunctionDecl(); |
| if (!GetClassFunctionDecl) |
| SynthGetClassFunctionDecl(); |
| if (!GetMetaClassFunctionDecl) |
| SynthGetMetaClassFunctionDecl(); |
| |
| // default to objc_msgSend(). |
| FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl; |
| // May need to use objc_msgSend_stret() as well. |
| FunctionDecl *MsgSendStretFlavor = 0; |
| if (ObjCMethodDecl *mDecl = Exp->getMethodDecl()) { |
| QualType resultType = mDecl->getResultType(); |
| if (resultType.getCanonicalType()->isStructureType() |
| || resultType.getCanonicalType()->isUnionType()) |
| MsgSendStretFlavor = MsgSendStretFunctionDecl; |
| else if (resultType.getCanonicalType()->isRealFloatingType()) |
| MsgSendFlavor = MsgSendFpretFunctionDecl; |
| } |
| |
| // Synthesize a call to objc_msgSend(). |
| llvm::SmallVector<Expr*, 8> MsgExprs; |
| IdentifierInfo *clsName = Exp->getClassName(); |
| |
| // Derive/push the receiver/selector, 2 implicit arguments to objc_msgSend(). |
| if (clsName) { // class message. |
| if (!strcmp(clsName->getName(), "super")) { |
| MsgSendFlavor = MsgSendSuperFunctionDecl; |
| if (MsgSendStretFlavor) |
| MsgSendStretFlavor = MsgSendSuperStretFunctionDecl; |
| assert(MsgSendFlavor && "MsgSendFlavor is NULL!"); |
| |
| ObjCInterfaceDecl *SuperDecl = |
| CurMethodDecl->getClassInterface()->getSuperClass(); |
| |
| llvm::SmallVector<Expr*, 4> InitExprs; |
| |
| // set the receiver to self, the first argument to all methods. |
| InitExprs.push_back(new DeclRefExpr( |
| CurMethodDecl->getSelfDecl(), |
| Context->getObjCIdType(), |
| SourceLocation())); |
| llvm::SmallVector<Expr*, 8> ClsExprs; |
| QualType argType = Context->getPointerType(Context->CharTy); |
| ClsExprs.push_back(new StringLiteral(SuperDecl->getIdentifier()->getName(), |
| SuperDecl->getIdentifier()->getLength(), |
| false, argType, SourceLocation(), |
| SourceLocation())); |
| CallExpr *Cls = SynthesizeCallToFunctionDecl(GetMetaClassFunctionDecl, |
| &ClsExprs[0], |
| ClsExprs.size()); |
| // To turn off a warning, type-cast to 'id' |
| InitExprs.push_back( |
| new CastExpr(Context->getObjCIdType(), |
| Cls, SourceLocation())); // set 'super class', using objc_getClass(). |
| // struct objc_super |
| QualType superType = getSuperStructType(); |
| Expr *SuperRep; |
| |
| if (LangOpts.Microsoft) { |
| SynthSuperContructorFunctionDecl(); |
| // Simulate a contructor call... |
| DeclRefExpr *DRE = new DeclRefExpr(SuperContructorFunctionDecl, |
| superType, SourceLocation()); |
| SuperRep = new CallExpr(DRE, &InitExprs[0], InitExprs.size(), |
| superType, SourceLocation()); |
| } else { |
| // (struct objc_super) { <exprs from above> } |
| InitListExpr *ILE = new InitListExpr(SourceLocation(), |
| &InitExprs[0], InitExprs.size(), |
| SourceLocation()); |
| SuperRep = new CompoundLiteralExpr(SourceLocation(), superType, ILE, false); |
| } |
| // struct objc_super * |
| Expr *Unop = new UnaryOperator(SuperRep, UnaryOperator::AddrOf, |
| Context->getPointerType(SuperRep->getType()), |
| SourceLocation()); |
| MsgExprs.push_back(Unop); |
| } else { |
| llvm::SmallVector<Expr*, 8> ClsExprs; |
| QualType argType = Context->getPointerType(Context->CharTy); |
| ClsExprs.push_back(new StringLiteral(clsName->getName(), |
| clsName->getLength(), |
| false, argType, SourceLocation(), |
| SourceLocation())); |
| CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, |
| &ClsExprs[0], |
| ClsExprs.size()); |
| MsgExprs.push_back(Cls); |
| } |
| } else { // instance message. |
| Expr *recExpr = Exp->getReceiver(); |
| |
| if (ObjCInterfaceDecl *SuperDecl = isSuperReceiver(recExpr)) { |
| MsgSendFlavor = MsgSendSuperFunctionDecl; |
| if (MsgSendStretFlavor) |
| MsgSendStretFlavor = MsgSendSuperStretFunctionDecl; |
| assert(MsgSendFlavor && "MsgSendFlavor is NULL!"); |
| |
| llvm::SmallVector<Expr*, 4> InitExprs; |
| |
| InitExprs.push_back( |
| new CastExpr(Context->getObjCIdType(), |
| new DeclRefExpr(CurMethodDecl->getSelfDecl(), |
| Context->getObjCIdType(), |
| SourceLocation()), |
| SourceLocation())); // set the 'receiver'. |
| |
| llvm::SmallVector<Expr*, 8> ClsExprs; |
| QualType argType = Context->getPointerType(Context->CharTy); |
| ClsExprs.push_back(new StringLiteral(SuperDecl->getIdentifier()->getName(), |
| SuperDecl->getIdentifier()->getLength(), |
| false, argType, SourceLocation(), |
| SourceLocation())); |
| CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, |
| &ClsExprs[0], |
| ClsExprs.size()); |
| // To turn off a warning, type-cast to 'id' |
| InitExprs.push_back( |
| new CastExpr(Context->getObjCIdType(), |
| Cls, SourceLocation())); // set 'super class', using objc_getClass(). |
| // struct objc_super |
| QualType superType = getSuperStructType(); |
| Expr *SuperRep; |
| |
| if (LangOpts.Microsoft) { |
| SynthSuperContructorFunctionDecl(); |
| // Simulate a contructor call... |
| DeclRefExpr *DRE = new DeclRefExpr(SuperContructorFunctionDecl, |
| superType, SourceLocation()); |
| SuperRep = new CallExpr(DRE, &InitExprs[0], InitExprs.size(), |
| superType, SourceLocation()); |
| } else { |
| // (struct objc_super) { <exprs from above> } |
| InitListExpr *ILE = new InitListExpr(SourceLocation(), |
| &InitExprs[0], InitExprs.size(), |
| SourceLocation()); |
| SuperRep = new CompoundLiteralExpr(SourceLocation(), superType, ILE, false); |
| } |
| // struct objc_super * |
| Expr *Unop = new UnaryOperator(SuperRep, UnaryOperator::AddrOf, |
| Context->getPointerType(SuperRep->getType()), |
| SourceLocation()); |
| MsgExprs.push_back(Unop); |
| } else { |
| // Remove all type-casts because it may contain objc-style types; e.g. |
| // Foo<Proto> *. |
| while (CastExpr *CE = dyn_cast<CastExpr>(recExpr)) |
| recExpr = CE->getSubExpr(); |
| recExpr = new CastExpr(Context->getObjCIdType(), recExpr, SourceLocation()); |
| MsgExprs.push_back(recExpr); |
| } |
| } |
| // Create a call to sel_registerName("selName"), it will be the 2nd argument. |
| llvm::SmallVector<Expr*, 8> SelExprs; |
| QualType argType = Context->getPointerType(Context->CharTy); |
| SelExprs.push_back(new StringLiteral(Exp->getSelector().getName().c_str(), |
| Exp->getSelector().getName().size(), |
| false, argType, SourceLocation(), |
| SourceLocation())); |
| CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl, |
| &SelExprs[0], SelExprs.size()); |
| MsgExprs.push_back(SelExp); |
| |
| // Now push any user supplied arguments. |
| for (unsigned i = 0; i < Exp->getNumArgs(); i++) { |
| Expr *userExpr = Exp->getArg(i); |
| // Make all implicit casts explicit...ICE comes in handy:-) |
| if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(userExpr)) { |
| // Reuse the ICE type, it is exactly what the doctor ordered. |
| userExpr = new CastExpr(ICE->getType()->isObjCQualifiedIdType() |
| ? Context->getObjCIdType() |
| : ICE->getType(), userExpr, SourceLocation()); |
| } |
| // Make id<P...> cast into an 'id' cast. |
| else if (CastExpr *CE = dyn_cast<CastExpr>(userExpr)) { |
| if (CE->getType()->isObjCQualifiedIdType()) { |
| while ((CE = dyn_cast<CastExpr>(userExpr))) |
| userExpr = CE->getSubExpr(); |
| userExpr = new CastExpr(Context->getObjCIdType(), |
| userExpr, SourceLocation()); |
| } |
| } |
| MsgExprs.push_back(userExpr); |
| // We've transferred the ownership to MsgExprs. Null out the argument in |
| // the original expression, since we will delete it below. |
| Exp->setArg(i, 0); |
| } |
| // Generate the funky cast. |
| CastExpr *cast; |
| llvm::SmallVector<QualType, 8> ArgTypes; |
| QualType returnType; |
| |
| // Push 'id' and 'SEL', the 2 implicit arguments. |
| if (MsgSendFlavor == MsgSendSuperFunctionDecl) |
| ArgTypes.push_back(Context->getPointerType(getSuperStructType())); |
| else |
| ArgTypes.push_back(Context->getObjCIdType()); |
| ArgTypes.push_back(Context->getObjCSelType()); |
| if (ObjCMethodDecl *mDecl = Exp->getMethodDecl()) { |
| // Push any user argument types. |
| for (unsigned i = 0; i < mDecl->getNumParams(); i++) { |
| QualType t = mDecl->getParamDecl(i)->getType()->isObjCQualifiedIdType() |
| ? Context->getObjCIdType() |
| : mDecl->getParamDecl(i)->getType(); |
| ArgTypes.push_back(t); |
| } |
| returnType = mDecl->getResultType()->isObjCQualifiedIdType() |
| ? Context->getObjCIdType() : mDecl->getResultType(); |
| } else { |
| returnType = Context->getObjCIdType(); |
| } |
| // Get the type, we will need to reference it in a couple spots. |
| QualType msgSendType = MsgSendFlavor->getType(); |
| |
| // Create a reference to the objc_msgSend() declaration. |
| DeclRefExpr *DRE = new DeclRefExpr(MsgSendFlavor, msgSendType, |
| SourceLocation()); |
| |
| // Need to cast objc_msgSend to "void *" (to workaround a GCC bandaid). |
| // If we don't do this cast, we get the following bizarre warning/note: |
| // xx.m:13: warning: function called through a non-compatible type |
| // xx.m:13: note: if this code is reached, the program will abort |
| cast = new CastExpr(Context->getPointerType(Context->VoidTy), DRE, |
| SourceLocation()); |
| |
| // Now do the "normal" pointer to function cast. |
| QualType castType = Context->getFunctionType(returnType, |
| &ArgTypes[0], ArgTypes.size(), |
| // If we don't have a method decl, force a variadic cast. |
| Exp->getMethodDecl() ? Exp->getMethodDecl()->isVariadic() : true); |
| castType = Context->getPointerType(castType); |
| cast = new CastExpr(castType, cast, SourceLocation()); |
| |
| // Don't forget the parens to enforce the proper binding. |
| ParenExpr *PE = new ParenExpr(SourceLocation(), SourceLocation(), cast); |
| |
| const FunctionType *FT = msgSendType->getAsFunctionType(); |
| CallExpr *CE = new CallExpr(PE, &MsgExprs[0], MsgExprs.size(), |
| FT->getResultType(), SourceLocation()); |
| Stmt *ReplacingStmt = CE; |
| if (MsgSendStretFlavor) { |
| // We have the method which returns a struct/union. Must also generate |
| // call to objc_msgSend_stret and hang both varieties on a conditional |
| // expression which dictate which one to envoke depending on size of |
| // method's return type. |
| |
| // Create a reference to the objc_msgSend_stret() declaration. |
| DeclRefExpr *STDRE = new DeclRefExpr(MsgSendStretFlavor, msgSendType, |
| SourceLocation()); |
| // Need to cast objc_msgSend_stret to "void *" (see above comment). |
| cast = new CastExpr(Context->getPointerType(Context->VoidTy), STDRE, |
| SourceLocation()); |
| // Now do the "normal" pointer to function cast. |
| castType = Context->getFunctionType(returnType, |
| &ArgTypes[0], ArgTypes.size(), |
| Exp->getMethodDecl() ? Exp->getMethodDecl()->isVariadic() : false); |
| castType = Context->getPointerType(castType); |
| cast = new CastExpr(castType, cast, SourceLocation()); |
| |
| // Don't forget the parens to enforce the proper binding. |
| PE = new ParenExpr(SourceLocation(), SourceLocation(), cast); |
| |
| FT = msgSendType->getAsFunctionType(); |
| CallExpr *STCE = new CallExpr(PE, &MsgExprs[0], MsgExprs.size(), |
| FT->getResultType(), SourceLocation()); |
| |
| // Build sizeof(returnType) |
| SizeOfAlignOfTypeExpr *sizeofExpr = new SizeOfAlignOfTypeExpr(true, |
| returnType, Context->getSizeType(), |
| SourceLocation(), SourceLocation()); |
| // (sizeof(returnType) <= 8 ? objc_msgSend(...) : objc_msgSend_stret(...)) |
| // FIXME: Value of 8 is base on ppc32/x86 ABI for the most common cases. |
| // For X86 it is more complicated and some kind of target specific routine |
| // is needed to decide what to do. |
| unsigned IntSize = |
| static_cast<unsigned>(Context->getTypeSize(Context->IntTy)); |
| IntegerLiteral *limit = new IntegerLiteral(llvm::APInt(IntSize, 8), |
| Context->IntTy, |
| SourceLocation()); |
| BinaryOperator *lessThanExpr = new BinaryOperator(sizeofExpr, limit, |
| BinaryOperator::LE, |
| Context->IntTy, |
| SourceLocation()); |
| // (sizeof(returnType) <= 8 ? objc_msgSend(...) : objc_msgSend_stret(...)) |
| ConditionalOperator *CondExpr = |
| new ConditionalOperator(lessThanExpr, CE, STCE, returnType); |
| ReplacingStmt = new ParenExpr(SourceLocation(), SourceLocation(), CondExpr); |
| } |
| return ReplacingStmt; |
| } |
| |
| Stmt *RewriteObjC::RewriteMessageExpr(ObjCMessageExpr *Exp) { |
| Stmt *ReplacingStmt = SynthMessageExpr(Exp); |
| // Now do the actual rewrite. |
| ReplaceStmt(Exp, ReplacingStmt); |
| |
| delete Exp; |
| return ReplacingStmt; |
| } |
| |
| /// RewriteObjCProtocolExpr - Rewrite a protocol expression into |
| /// call to objc_getProtocol("proto-name"). |
| Stmt *RewriteObjC::RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp) { |
| if (!GetProtocolFunctionDecl) |
| SynthGetProtocolFunctionDecl(); |
| // Create a call to objc_getProtocol("ProtocolName"). |
| llvm::SmallVector<Expr*, 8> ProtoExprs; |
| QualType argType = Context->getPointerType(Context->CharTy); |
| ProtoExprs.push_back(new StringLiteral(Exp->getProtocol()->getName(), |
| strlen(Exp->getProtocol()->getName()), |
| false, argType, SourceLocation(), |
| SourceLocation())); |
| CallExpr *ProtoExp = SynthesizeCallToFunctionDecl(GetProtocolFunctionDecl, |
| &ProtoExprs[0], |
| ProtoExprs.size()); |
| ReplaceStmt(Exp, ProtoExp); |
| delete Exp; |
| return ProtoExp; |
| |
| } |
| |
| bool RewriteObjC::BufferContainsPPDirectives(const char *startBuf, |
| const char *endBuf) { |
| while (startBuf < endBuf) { |
| if (*startBuf == '#') { |
| // Skip whitespace. |
| for (++startBuf; startBuf[0] == ' ' || startBuf[0] == '\t'; ++startBuf) |
| ; |
| if (!strncmp(startBuf, "if", strlen("if")) || |
| !strncmp(startBuf, "ifdef", strlen("ifdef")) || |
| !strncmp(startBuf, "ifndef", strlen("ifndef")) || |
| !strncmp(startBuf, "define", strlen("define")) || |
| !strncmp(startBuf, "undef", strlen("undef")) || |
| !strncmp(startBuf, "else", strlen("else")) || |
| !strncmp(startBuf, "elif", strlen("elif")) || |
| !strncmp(startBuf, "endif", strlen("endif")) || |
| !strncmp(startBuf, "pragma", strlen("pragma")) || |
| !strncmp(startBuf, "include", strlen("include")) || |
| !strncmp(startBuf, "import", strlen("import")) || |
| !strncmp(startBuf, "include_next", strlen("include_next"))) |
| return true; |
| } |
| startBuf++; |
| } |
| return false; |
| } |
| |
| /// SynthesizeObjCInternalStruct - Rewrite one internal struct corresponding to |
| /// an objective-c class with ivars. |
| void RewriteObjC::SynthesizeObjCInternalStruct(ObjCInterfaceDecl *CDecl, |
| std::string &Result) { |
| assert(CDecl && "Class missing in SynthesizeObjCInternalStruct"); |
| assert(CDecl->getName() && "Name missing in SynthesizeObjCInternalStruct"); |
| // Do not synthesize more than once. |
| if (ObjCSynthesizedStructs.count(CDecl)) |
| return; |
| ObjCInterfaceDecl *RCDecl = CDecl->getSuperClass(); |
| int NumIvars = CDecl->ivar_size(); |
| SourceLocation LocStart = CDecl->getLocStart(); |
| SourceLocation LocEnd = CDecl->getLocEnd(); |
| |
| const char *startBuf = SM->getCharacterData(LocStart); |
| const char *endBuf = SM->getCharacterData(LocEnd); |
| |
| // If no ivars and no root or if its root, directly or indirectly, |
| // have no ivars (thus not synthesized) then no need to synthesize this class. |
| if ((CDecl->isForwardDecl() || NumIvars == 0) && |
| (!RCDecl || !ObjCSynthesizedStructs.count(RCDecl))) { |
| endBuf += Lexer::MeasureTokenLength(LocEnd, *SM); |
| ReplaceText(LocStart, endBuf-startBuf, Result.c_str(), Result.size()); |
| return; |
| } |
| |
| // FIXME: This has potential of causing problem. If |
| // SynthesizeObjCInternalStruct is ever called recursively. |
| Result += "\nstruct "; |
| Result += CDecl->getName(); |
| if (LangOpts.Microsoft) |
| Result += "_IMPL"; |
| |
| if (NumIvars > 0) { |
| const char *cursor = strchr(startBuf, '{'); |
| assert((cursor && endBuf) |
| && "SynthesizeObjCInternalStruct - malformed @interface"); |
| // If the buffer contains preprocessor directives, we do more fine-grained |
| // rewrites. This is intended to fix code that looks like (which occurs in |
| // NSURL.h, for example): |
| // |
| // #ifdef XYZ |
| // @interface Foo : NSObject |
| // #else |
| // @interface FooBar : NSObject |
| // #endif |
| // { |
| // int i; |
| // } |
| // @end |
| // |
| // This clause is segregated to avoid breaking the common case. |
| if (BufferContainsPPDirectives(startBuf, cursor)) { |
| SourceLocation L = RCDecl ? CDecl->getSuperClassLoc() : |
| CDecl->getClassLoc(); |
| const char *endHeader = SM->getCharacterData(L); |
| endHeader += Lexer::MeasureTokenLength(L, *SM); |
| |
| if (!CDecl->getReferencedProtocols().empty()) { |
| // advance to the end of the referenced protocols. |
| while (endHeader < cursor && *endHeader != '>') endHeader++; |
| endHeader++; |
| } |
| // rewrite the original header |
| ReplaceText(LocStart, endHeader-startBuf, Result.c_str(), Result.size()); |
| } else { |
| // rewrite the original header *without* disturbing the '{' |
| ReplaceText(LocStart, cursor-startBuf-1, Result.c_str(), Result.size()); |
| } |
| if (RCDecl && ObjCSynthesizedStructs.count(RCDecl)) { |
| Result = "\n struct "; |
| Result += RCDecl->getName(); |
| Result += "_IMPL "; |
| Result += RCDecl->getName(); |
| Result += "_IVARS;\n"; |
| |
| // insert the super class structure definition. |
| SourceLocation OnePastCurly = |
| LocStart.getFileLocWithOffset(cursor-startBuf+1); |
| InsertText(OnePastCurly, Result.c_str(), Result.size()); |
| } |
| cursor++; // past '{' |
| |
| // Now comment out any visibility specifiers. |
| while (cursor < endBuf) { |
| if (*cursor == '@') { |
| SourceLocation atLoc = LocStart.getFileLocWithOffset(cursor-startBuf); |
| // Skip whitespace. |
| for (++cursor; cursor[0] == ' ' || cursor[0] == '\t'; ++cursor) |
| /*scan*/; |
| |
| // FIXME: presence of @public, etc. inside comment results in |
| // this transformation as well, which is still correct c-code. |
| if (!strncmp(cursor, "public", strlen("public")) || |
| !strncmp(cursor, "private", strlen("private")) || |
| !strncmp(cursor, "package", strlen("package")) || |
| !strncmp(cursor, "protected", strlen("protected"))) |
| InsertText(atLoc, "// ", 3); |
| } |
| // FIXME: If there are cases where '<' is used in ivar declaration part |
| // of user code, then scan the ivar list and use needToScanForQualifiers |
| // for type checking. |
| else if (*cursor == '<') { |
| SourceLocation atLoc = LocStart.getFileLocWithOffset(cursor-startBuf); |
| InsertText(atLoc, "/* ", 3); |
| cursor = strchr(cursor, '>'); |
| cursor++; |
| atLoc = LocStart.getFileLocWithOffset(cursor-startBuf); |
| InsertText(atLoc, " */", 3); |
| } |
| cursor++; |
| } |
| // Don't forget to add a ';'!! |
| InsertText(LocEnd.getFileLocWithOffset(1), ";", 1); |
| } else { // we don't have any instance variables - insert super struct. |
| endBuf += Lexer::MeasureTokenLength(LocEnd, *SM); |
| Result += " {\n struct "; |
| Result += RCDecl->getName(); |
| Result += "_IMPL "; |
| Result += RCDecl->getName(); |
| Result += "_IVARS;\n};\n"; |
| ReplaceText(LocStart, endBuf-startBuf, Result.c_str(), Result.size()); |
| } |
| // Mark this struct as having been generated. |
| if (!ObjCSynthesizedStructs.insert(CDecl)) |
| assert(false && "struct already synthesize- SynthesizeObjCInternalStruct"); |
| } |
| |
| // RewriteObjCMethodsMetaData - Rewrite methods metadata for instance or |
| /// class methods. |
| void RewriteObjC::RewriteObjCMethodsMetaData(instmeth_iterator MethodBegin, |
| instmeth_iterator MethodEnd, |
| bool IsInstanceMethod, |
| const char *prefix, |
| const char *ClassName, |
| std::string &Result) { |
| if (MethodBegin == MethodEnd) return; |
| |
| static bool objc_impl_method = false; |
| if (!objc_impl_method) { |
| /* struct _objc_method { |
| SEL _cmd; |
| char *method_types; |
| void *_imp; |
| } |
| */ |
| Result += "\nstruct _objc_method {\n"; |
| Result += "\tSEL _cmd;\n"; |
| Result += "\tchar *method_types;\n"; |
| Result += "\tvoid *_imp;\n"; |
| Result += "};\n"; |
| |
| objc_impl_method = true; |
| } |
| |
| // Build _objc_method_list for class's methods if needed |
| |
| /* struct { |
| struct _objc_method_list *next_method; |
| int method_count; |
| struct _objc_method method_list[]; |
| } |
| */ |
| Result += "\nstatic struct {\n"; |
| Result += "\tstruct _objc_method_list *next_method;\n"; |
| Result += "\tint method_count;\n"; |
| Result += "\tstruct _objc_method method_list["; |
| Result += utostr(MethodEnd-MethodBegin); |
| Result += "];\n} _OBJC_"; |
| Result += prefix; |
| Result += IsInstanceMethod ? "INSTANCE" : "CLASS"; |
| Result += "_METHODS_"; |
| Result += ClassName; |
| Result += " __attribute__ ((used, section (\"__OBJC, __"; |
| Result += IsInstanceMethod ? "inst" : "cls"; |
| Result += "_meth\")))= "; |
| Result += "{\n\t0, " + utostr(MethodEnd-MethodBegin) + "\n"; |
| |
| Result += "\t,{{(SEL)\""; |
| Result += (*MethodBegin)->getSelector().getName().c_str(); |
| std::string MethodTypeString; |
| Context->getObjCEncodingForMethodDecl(*MethodBegin, MethodTypeString); |
| Result += "\", \""; |
| Result += MethodTypeString; |
| Result += "\", (void *)"; |
| Result += MethodInternalNames[*MethodBegin]; |
| Result += "}\n"; |
| for (++MethodBegin; MethodBegin != MethodEnd; ++MethodBegin) { |
| Result += "\t ,{(SEL)\""; |
| Result += (*MethodBegin)->getSelector().getName().c_str(); |
| std::string MethodTypeString; |
| Context->getObjCEncodingForMethodDecl(*MethodBegin, MethodTypeString); |
| Result += "\", \""; |
| Result += MethodTypeString; |
| Result += "\", (void *)"; |
| Result += MethodInternalNames[*MethodBegin]; |
| Result += "}\n"; |
| } |
| Result += "\t }\n};\n"; |
| } |
| |
| /// RewriteObjCProtocolsMetaData - Rewrite protocols meta-data. |
| void RewriteObjC:: |
| RewriteObjCProtocolsMetaData(const ObjCList<ObjCProtocolDecl> &Protocols, |
| const char *prefix, |
| const char *ClassName, |
| std::string &Result) { |
| static bool objc_protocol_methods = false; |
| if (Protocols.empty()) return; |
| |
| for (unsigned i = 0; i != Protocols.size(); i++) { |
| ObjCProtocolDecl *PDecl = Protocols[i]; |
| // Output struct protocol_methods holder of method selector and type. |
| if (!objc_protocol_methods && !PDecl->isForwardDecl()) { |
| /* struct protocol_methods { |
| SEL _cmd; |
| char *method_types; |
| } |
| */ |
| Result += "\nstruct protocol_methods {\n"; |
| Result += "\tSEL _cmd;\n"; |
| Result += "\tchar *method_types;\n"; |
| Result += "};\n"; |
| |
| objc_protocol_methods = true; |
| } |
| // Do not synthesize the protocol more than once. |
| if (ObjCSynthesizedProtocols.count(PDecl)) |
| continue; |
| |
| if (PDecl->instmeth_begin() != PDecl->instmeth_end()) { |
| unsigned NumMethods = PDecl->getNumInstanceMethods(); |
| /* struct _objc_protocol_method_list { |
| int protocol_method_count; |
| struct protocol_methods protocols[]; |
| } |
| */ |
| Result += "\nstatic struct {\n"; |
| Result += "\tint protocol_method_count;\n"; |
| Result += "\tstruct protocol_methods protocols["; |
| Result += utostr(NumMethods); |
| Result += "];\n} _OBJC_PROTOCOL_INSTANCE_METHODS_"; |
| Result += PDecl->getName(); |
| Result += " __attribute__ ((used, section (\"__OBJC, __cat_inst_meth\")))= " |
| "{\n\t" + utostr(NumMethods) + "\n"; |
| |
| // Output instance methods declared in this protocol. |
| for (ObjCProtocolDecl::instmeth_iterator I = PDecl->instmeth_begin(), |
| E = PDecl->instmeth_end(); I != E; ++I) { |
| if (I == PDecl->instmeth_begin()) |
| Result += "\t ,{{(SEL)\""; |
| else |
| Result += "\t ,{(SEL)\""; |
| Result += (*I)->getSelector().getName().c_str(); |
| std::string MethodTypeString; |
| Context->getObjCEncodingForMethodDecl((*I), MethodTypeString); |
| Result += "\", \""; |
| Result += MethodTypeString; |
| Result += "\"}\n"; |
| } |
| Result += "\t }\n};\n"; |
| } |
| |
| // Output class methods declared in this protocol. |
| int NumMethods = PDecl->getNumClassMethods(); |
| if (NumMethods > 0) { |
| /* struct _objc_protocol_method_list { |
| int protocol_method_count; |
| struct protocol_methods protocols[]; |
| } |
| */ |
| Result += "\nstatic struct {\n"; |
| Result += "\tint protocol_method_count;\n"; |
| Result += "\tstruct protocol_methods protocols["; |
| Result += utostr(NumMethods); |
| Result += "];\n} _OBJC_PROTOCOL_CLASS_METHODS_"; |
| Result += PDecl->getName(); |
| Result += " __attribute__ ((used, section (\"__OBJC, __cat_cls_meth\")))= " |
| "{\n\t"; |
| Result += utostr(NumMethods); |
| Result += "\n"; |
| |
| // Output instance methods declared in this protocol. |
| for (ObjCProtocolDecl::classmeth_iterator I = PDecl->classmeth_begin(), |
| E = PDecl->classmeth_end(); I != E; ++I) { |
| if (I == PDecl->classmeth_begin()) |
| Result += "\t ,{{(SEL)\""; |
| else |
| Result += "\t ,{(SEL)\""; |
| Result += (*I)->getSelector().getName().c_str(); |
| std::string MethodTypeString; |
| Context->getObjCEncodingForMethodDecl((*I), MethodTypeString); |
| Result += "\", \""; |
| Result += MethodTypeString; |
| Result += "\"}\n"; |
| } |
| Result += "\t }\n};\n"; |
| } |
| |
| // Output: |
| /* struct _objc_protocol { |
| // Objective-C 1.0 extensions |
| struct _objc_protocol_extension *isa; |
| char *protocol_name; |
| struct _objc_protocol **protocol_list; |
| struct _objc_protocol_method_list *instance_methods; |
| struct _objc_protocol_method_list *class_methods; |
| }; |
| */ |
| static bool objc_protocol = false; |
| if (!objc_protocol) { |
| Result += "\nstruct _objc_protocol {\n"; |
| Result += "\tstruct _objc_protocol_extension *isa;\n"; |
| Result += "\tchar *protocol_name;\n"; |
| Result += "\tstruct _objc_protocol **protocol_list;\n"; |
| Result += "\tstruct _objc_protocol_method_list *instance_methods;\n"; |
| Result += "\tstruct _objc_protocol_method_list *class_methods;\n"; |
| Result += "};\n"; |
| |
| objc_protocol = true; |
| } |
| |
| Result += "\nstatic struct _objc_protocol _OBJC_PROTOCOL_"; |
| Result += PDecl->getName(); |
| Result += " __attribute__ ((used, section (\"__OBJC, __protocol\")))= " |
| "{\n\t0, \""; |
| Result += PDecl->getName(); |
| Result += "\", 0, "; |
| if (PDecl->instmeth_begin() != PDecl->instmeth_end()) { |
| Result += "(struct _objc_protocol_method_list *)&_OBJC_PROTOCOL_INSTANCE_METHODS_"; |
| Result += PDecl->getName(); |
| Result += ", "; |
| } |
| else |
| Result += "0, "; |
| if (PDecl->getNumClassMethods() > 0) { |
| Result += "(struct _objc_protocol_method_list *)&_OBJC_PROTOCOL_CLASS_METHODS_"; |
| Result += PDecl->getName(); |
| Result += "\n"; |
| } |
| else |
| Result += "0\n"; |
| Result += "};\n"; |
| |
| // Mark this protocol as having been generated. |
| if (!ObjCSynthesizedProtocols.insert(PDecl)) |
| assert(false && "protocol already synthesized"); |
| } |
| // Output the top lovel protocol meta-data for the class. |
| /* struct _objc_protocol_list { |
| struct _objc_protocol_list *next; |
| int protocol_count; |
| struct _objc_protocol *class_protocols[]; |
| } |
| */ |
| Result += "\nstatic struct {\n"; |
| Result += "\tstruct _objc_protocol_list *next;\n"; |
| Result += "\tint protocol_count;\n"; |
| Result += "\tstruct _objc_protocol *class_protocols["; |
| Result += utostr(Protocols.size()); |
| Result += "];\n} _OBJC_"; |
| Result += prefix; |
| Result += "_PROTOCOLS_"; |
| Result += ClassName; |
| Result += " __attribute__ ((used, section (\"__OBJC, __cat_cls_meth\")))= " |
| "{\n\t0, "; |
| Result += utostr(Protocols.size()); |
| Result += "\n"; |
| |
| Result += "\t,{&_OBJC_PROTOCOL_"; |
| Result += Protocols[0]->getName(); |
| Result += " \n"; |
| |
| for (unsigned i = 1; i != Protocols.size(); i++) { |
| Result += "\t ,&_OBJC_PROTOCOL_"; |
| Result += Protocols[i]->getName(); |
| Result += "\n"; |
| } |
| Result += "\t }\n};\n"; |
| } |
| |
| /// RewriteObjCCategoryImplDecl - Rewrite metadata for each category |
| /// implementation. |
| void RewriteObjC::RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *IDecl, |
| std::string &Result) { |
| ObjCInterfaceDecl *ClassDecl = IDecl->getClassInterface(); |
| // Find category declaration for this implementation. |
| ObjCCategoryDecl *CDecl; |
| for (CDecl = ClassDecl->getCategoryList(); CDecl; |
| CDecl = CDecl->getNextClassCategory()) |
| if (CDecl->getIdentifier() == IDecl->getIdentifier()) |
| break; |
| |
| std::string FullCategoryName = ClassDecl->getName(); |
| FullCategoryName += '_'; |
| FullCategoryName += IDecl->getName(); |
| |
| // Build _objc_method_list for class's instance methods if needed |
| RewriteObjCMethodsMetaData(IDecl->instmeth_begin(), IDecl->instmeth_end(), |
| true, "CATEGORY_", FullCategoryName.c_str(), |
| Result); |
| |
| // Build _objc_method_list for class's class methods if needed |
| RewriteObjCMethodsMetaData(IDecl->classmeth_begin(), IDecl->classmeth_end(), |
| false, "CATEGORY_", FullCategoryName.c_str(), |
| Result); |
| |
| // Protocols referenced in class declaration? |
| // Null CDecl is case of a category implementation with no category interface |
| if (CDecl) |
| RewriteObjCProtocolsMetaData(CDecl->getReferencedProtocols(), "CATEGORY", |
| FullCategoryName.c_str(), Result); |
| |
| /* struct _objc_category { |
| char *category_name; |
| char *class_name; |
| struct _objc_method_list *instance_methods; |
| struct _objc_method_list *class_methods; |
| struct _objc_protocol_list *protocols; |
| // Objective-C 1.0 extensions |
| uint32_t size; // sizeof (struct _objc_category) |
| struct _objc_property_list *instance_properties; // category's own |
| // @property decl. |
| }; |
| */ |
| |
| static bool objc_category = false; |
| if (!objc_category) { |
| Result += "\nstruct _objc_category {\n"; |
| Result += "\tchar *category_name;\n"; |
| Result += "\tchar *class_name;\n"; |
| Result += "\tstruct _objc_method_list *instance_methods;\n"; |
| Result += "\tstruct _objc_method_list *class_methods;\n"; |
| Result += "\tstruct _objc_protocol_list *protocols;\n"; |
| Result += "\tunsigned int size;\n"; |
| Result += "\tstruct _objc_property_list *instance_properties;\n"; |
| Result += "};\n"; |
| objc_category = true; |
| } |
| Result += "\nstatic struct _objc_category _OBJC_CATEGORY_"; |
| Result += FullCategoryName; |
| Result += " __attribute__ ((used, section (\"__OBJC, __category\")))= {\n\t\""; |
| Result += IDecl->getName(); |
| Result += "\"\n\t, \""; |
| Result += ClassDecl->getName(); |
| Result += "\"\n"; |
| |
| if (IDecl->getNumInstanceMethods() > 0) { |
| Result += "\t, (struct _objc_method_list *)" |
| "&_OBJC_CATEGORY_INSTANCE_METHODS_"; |
| Result += FullCategoryName; |
| Result += "\n"; |
| } |
| else |
| Result += "\t, 0\n"; |
| if (IDecl->getNumClassMethods() > 0) { |
| Result += "\t, (struct _objc_method_list *)" |
| "&_OBJC_CATEGORY_CLASS_METHODS_"; |
| Result += FullCategoryName; |
| Result += "\n"; |
| } |
| else |
| Result += "\t, 0\n"; |
| |
| if (CDecl && !CDecl->getReferencedProtocols().empty()) { |
| Result += "\t, (struct _objc_protocol_list *)&_OBJC_CATEGORY_PROTOCOLS_"; |
| Result += FullCategoryName; |
| Result += "\n"; |
| } |
| else |
| Result += "\t, 0\n"; |
| Result += "\t, sizeof(struct _objc_category), 0\n};\n"; |
| } |
| |
| /// SynthesizeIvarOffsetComputation - This rutine synthesizes computation of |
| /// ivar offset. |
| void RewriteObjC::SynthesizeIvarOffsetComputation(ObjCImplementationDecl *IDecl, |
| ObjCIvarDecl *ivar, |
| std::string &Result) { |
| if (ivar->isBitField()) { |
| // FIXME: The hack below doesn't work for bitfields. For now, we simply |
| // place all bitfields at offset 0. |
| Result += "0"; |
| } else { |
| Result += "__OFFSETOFIVAR__(struct "; |
| Result += IDecl->getName(); |
| if (LangOpts.Microsoft) |
| Result += "_IMPL"; |
| Result += ", "; |
| Result += ivar->getName(); |
| Result += ")"; |
| } |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Meta Data Emission |
| //===----------------------------------------------------------------------===// |
| |
| void RewriteObjC::RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl, |
| std::string &Result) { |
| ObjCInterfaceDecl *CDecl = IDecl->getClassInterface(); |
| |
| // Explictly declared @interface's are already synthesized. |
| if (CDecl->ImplicitInterfaceDecl()) { |
| // FIXME: Implementation of a class with no @interface (legacy) doese not |
| // produce correct synthesis as yet. |
| SynthesizeObjCInternalStruct(CDecl, Result); |
| } |
| |
| // Build _objc_ivar_list metadata for classes ivars if needed |
| unsigned NumIvars = !IDecl->ivar_empty() |
| ? IDecl->ivar_size() |
| : (CDecl ? CDecl->ivar_size() : 0); |
| if (NumIvars > 0) { |
| static bool objc_ivar = false; |
| if (!objc_ivar) { |
| /* struct _objc_ivar { |
| char *ivar_name; |
| char *ivar_type; |
| int ivar_offset; |
| }; |
| */ |
| Result += "\nstruct _objc_ivar {\n"; |
| Result += "\tchar *ivar_name;\n"; |
| Result += "\tchar *ivar_type;\n"; |
| Result += "\tint ivar_offset;\n"; |
| Result += "};\n"; |
| |
| objc_ivar = true; |
| } |
| |
| /* struct { |
| int ivar_count; |
| struct _objc_ivar ivar_list[nIvars]; |
| }; |
| */ |
| Result += "\nstatic struct {\n"; |
| Result += "\tint ivar_count;\n"; |
| Result += "\tstruct _objc_ivar ivar_list["; |
| Result += utostr(NumIvars); |
| Result += "];\n} _OBJC_INSTANCE_VARIABLES_"; |
| Result += IDecl->getName(); |
| Result += " __attribute__ ((used, section (\"__OBJC, __instance_vars\")))= " |
| "{\n\t"; |
| Result += utostr(NumIvars); |
| Result += "\n"; |
| |
| ObjCInterfaceDecl::ivar_iterator IVI, IVE; |
| if (!IDecl->ivar_empty()) { |
| IVI = IDecl->ivar_begin(); |
| IVE = IDecl->ivar_end(); |
| } else { |
| IVI = CDecl->ivar_begin(); |
| IVE = CDecl->ivar_end(); |
| } |
| Result += "\t,{{\""; |
| Result += (*IVI)->getName(); |
| Result += "\", \""; |
| std::string StrEncoding; |
| Context->getObjCEncodingForType((*IVI)->getType(), StrEncoding, |
| EncodingRecordTypes); |
| Result += StrEncoding; |
| Result += "\", "; |
| SynthesizeIvarOffsetComputation(IDecl, *IVI, Result); |
| Result += "}\n"; |
| for (++IVI; IVI != IVE; ++IVI) { |
| Result += "\t ,{\""; |
| Result += (*IVI)->getName(); |
| Result += "\", \""; |
| std::string StrEncoding; |
| Context->getObjCEncodingForType((*IVI)->getType(), StrEncoding, |
| EncodingRecordTypes); |
| Result += StrEncoding; |
| Result += "\", "; |
| SynthesizeIvarOffsetComputation(IDecl, (*IVI), Result); |
| Result += "}\n"; |
| } |
| |
| Result += "\t }\n};\n"; |
| } |
| |
| // Build _objc_method_list for class's instance methods if needed |
| RewriteObjCMethodsMetaData(IDecl->instmeth_begin(), IDecl->instmeth_end(), |
| true, "", IDecl->getName(), Result); |
| |
| // Build _objc_method_list for class's class methods if needed |
| RewriteObjCMethodsMetaData(IDecl->classmeth_begin(), IDecl->classmeth_end(), |
| false, "", IDecl->getName(), Result); |
| |
| // Protocols referenced in class declaration? |
| RewriteObjCProtocolsMetaData(CDecl->getReferencedProtocols(), |
| "CLASS", CDecl->getName(), Result); |
| |
| |
| // Declaration of class/meta-class metadata |
| /* struct _objc_class { |
| struct _objc_class *isa; // or const char *root_class_name when metadata |
| const char *super_class_name; |
| char *name; |
| long version; |
| long info; |
| long instance_size; |
| struct _objc_ivar_list *ivars; |
| struct _objc_method_list *methods; |
| struct objc_cache *cache; |
| struct objc_protocol_list *protocols; |
| const char *ivar_layout; |
| struct _objc_class_ext *ext; |
| }; |
| */ |
| static bool objc_class = false; |
| if (!objc_class) { |
| Result += "\nstruct _objc_class {\n"; |
| Result += "\tstruct _objc_class *isa;\n"; |
| Result += "\tconst char *super_class_name;\n"; |
| Result += "\tchar *name;\n"; |
| Result += "\tlong version;\n"; |
| Result += "\tlong info;\n"; |
| Result += "\tlong instance_size;\n"; |
| Result += "\tstruct _objc_ivar_list *ivars;\n"; |
| Result += "\tstruct _objc_method_list *methods;\n"; |
| Result += "\tstruct objc_cache *cache;\n"; |
| Result += "\tstruct _objc_protocol_list *protocols;\n"; |
| Result += "\tconst char *ivar_layout;\n"; |
| Result += "\tstruct _objc_class_ext *ext;\n"; |
| Result += "};\n"; |
| objc_class = true; |
| } |
| |
| // Meta-class metadata generation. |
| ObjCInterfaceDecl *RootClass = 0; |
| ObjCInterfaceDecl *SuperClass = CDecl->getSuperClass(); |
| while (SuperClass) { |
| RootClass = SuperClass; |
| SuperClass = SuperClass->getSuperClass(); |
| } |
| SuperClass = CDecl->getSuperClass(); |
| |
| Result += "\nstatic struct _objc_class _OBJC_METACLASS_"; |
| Result += CDecl->getName(); |
| Result += " __attribute__ ((used, section (\"__OBJC, __meta_class\")))= " |
| "{\n\t(struct _objc_class *)\""; |
| Result += (RootClass ? RootClass->getName() : CDecl->getName()); |
| Result += "\""; |
| |
| if (SuperClass) { |
| Result += ", \""; |
| Result += SuperClass->getName(); |
| Result += "\", \""; |
| Result += CDecl->getName(); |
| Result += "\""; |
| } |
| else { |
| Result += ", 0, \""; |
| Result += CDecl->getName(); |
| Result += "\""; |
| } |
| // Set 'ivars' field for root class to 0. ObjC1 runtime does not use it. |
| // 'info' field is initialized to CLS_META(2) for metaclass |
| Result += ", 0,2, sizeof(struct _objc_class), 0"; |
| if (IDecl->getNumClassMethods() > 0) { |
| Result += "\n\t, (struct _objc_method_list *)&_OBJC_CLASS_METHODS_"; |
| Result += IDecl->getName(); |
| Result += "\n"; |
| } |
| else |
| Result += ", 0\n"; |
| if (!CDecl->getReferencedProtocols().empty()) { |
| Result += "\t,0, (struct _objc_protocol_list *)&_OBJC_CLASS_PROTOCOLS_"; |
| Result += CDecl->getName(); |
| Result += ",0,0\n"; |
| } |
| else |
| Result += "\t,0,0,0,0\n"; |
| Result += "};\n"; |
| |
| // class metadata generation. |
| Result += "\nstatic struct _objc_class _OBJC_CLASS_"; |
| Result += CDecl->getName(); |
| Result += " __attribute__ ((used, section (\"__OBJC, __class\")))= " |
| "{\n\t&_OBJC_METACLASS_"; |
| Result += CDecl->getName(); |
| if (SuperClass) { |
| Result += ", \""; |
| Result += SuperClass->getName(); |
| Result += "\", \""; |
| Result += CDecl->getName(); |
| Result += "\""; |
| } |
| else { |
| Result += ", 0, \""; |
| Result += CDecl->getName(); |
| Result += "\""; |
| } |
| // 'info' field is initialized to CLS_CLASS(1) for class |
| Result += ", 0,1"; |
| if (!ObjCSynthesizedStructs.count(CDecl)) |
| Result += ",0"; |
| else { |
| // class has size. Must synthesize its size. |
| Result += ",sizeof(struct "; |
| Result += CDecl->getName(); |
| if (LangOpts.Microsoft) |
| Result += "_IMPL"; |
| Result += ")"; |
| } |
| if (NumIvars > 0) { |
| Result += ", (struct _objc_ivar_list *)&_OBJC_INSTANCE_VARIABLES_"; |
| Result += CDecl->getName(); |
| Result += "\n\t"; |
| } |
| else |
| Result += ",0"; |
| if (IDecl->getNumInstanceMethods() > 0) { |
| Result += ", (struct _objc_method_list *)&_OBJC_INSTANCE_METHODS_"; |
| Result += CDecl->getName(); |
| Result += ", 0\n\t"; |
| } |
| else |
| Result += ",0,0"; |
| if (!CDecl->getReferencedProtocols().empty()) { |
| Result += ", (struct _objc_protocol_list*)&_OBJC_CLASS_PROTOCOLS_"; |
| Result += CDecl->getName(); |
| Result += ", 0,0\n"; |
| } |
| else |
| Result += ",0,0,0\n"; |
| Result += "};\n"; |
| } |
| |
| /// RewriteImplementations - This routine rewrites all method implementations |
| /// and emits meta-data. |
| |
| void RewriteObjC::RewriteImplementations(std::string &Result) { |
| int ClsDefCount = ClassImplementation.size(); |
| int CatDefCount = CategoryImplementation.size(); |
| |
| if (ClsDefCount == 0 && CatDefCount == 0) |
| return; |
| // Rewrite implemented methods |
| for (int i = 0; i < ClsDefCount; i++) |
| RewriteImplementationDecl(ClassImplementation[i]); |
| |
| for (int i = 0; i < CatDefCount; i++) |
| RewriteImplementationDecl(CategoryImplementation[i]); |
| |
| // This is needed for determining instance variable offsets. |
| Result += "#define __OFFSETOFIVAR__(TYPE, MEMBER) ((int) &((TYPE *)0)->MEMBER)\n"; |
| // For each implemented class, write out all its meta data. |
| for (int i = 0; i < ClsDefCount; i++) |
| RewriteObjCClassMetaData(ClassImplementation[i], Result); |
| |
| // For each implemented category, write out all its meta data. |
| for (int i = 0; i < CatDefCount; i++) |
| RewriteObjCCategoryImplDecl(CategoryImplementation[i], Result); |
| |
| // Write objc_symtab metadata |
| /* |
| struct _objc_symtab |
| { |
| long sel_ref_cnt; |
| SEL *refs; |
| short cls_def_cnt; |
| short cat_def_cnt; |
| void *defs[cls_def_cnt + cat_def_cnt]; |
| }; |
| */ |
| |
| Result += "\nstruct _objc_symtab {\n"; |
| Result += "\tlong sel_ref_cnt;\n"; |
| Result += "\tSEL *refs;\n"; |
| Result += "\tshort cls_def_cnt;\n"; |
| Result += "\tshort cat_def_cnt;\n"; |
| Result += "\tvoid *defs[" + utostr(ClsDefCount + CatDefCount)+ "];\n"; |
| Result += "};\n\n"; |
| |
| Result += "static struct _objc_symtab " |
| "_OBJC_SYMBOLS __attribute__((used, section (\"__OBJC, __symbols\")))= {\n"; |
| Result += "\t0, 0, " + utostr(ClsDefCount) |
| + ", " + utostr(CatDefCount) + "\n"; |
| for (int i = 0; i < ClsDefCount; i++) { |
| Result += "\t,&_OBJC_CLASS_"; |
| Result += ClassImplementation[i]->getName(); |
| Result += "\n"; |
| } |
| |
| for (int i = 0; i < CatDefCount; i++) { |
| Result += "\t,&_OBJC_CATEGORY_"; |
| Result += CategoryImplementation[i]->getClassInterface()->getName(); |
| Result += "_"; |
| Result += CategoryImplementation[i]->getName(); |
| Result += "\n"; |
| } |
| |
| Result += "};\n\n"; |
| |
| // Write objc_module metadata |
| |
| /* |
| struct _objc_module { |
| long version; |
| long size; |
| const char *name; |
| struct _objc_symtab *symtab; |
| } |
| */ |
| |
| Result += "\nstruct _objc_module {\n"; |
| Result += "\tlong version;\n"; |
| Result += "\tlong size;\n"; |
| Result += "\tconst char *name;\n"; |
| Result += "\tstruct _objc_symtab *symtab;\n"; |
| Result += "};\n\n"; |
| Result += "static struct _objc_module " |
| "_OBJC_MODULES __attribute__ ((used, section (\"__OBJC, __module_info\")))= {\n"; |
| Result += "\t" + utostr(OBJC_ABI_VERSION) + |
| ", sizeof(struct _objc_module), \"\", &_OBJC_SYMBOLS\n"; |
| Result += "};\n\n"; |
| |
| if (LangOpts.Microsoft) { |
| Result += "#pragma section(\".objc_module_info$B\",long,read,write)\n"; |
| Result += "#pragma data_seg(push, \".objc_module_info$B\")\n"; |
| Result += "static struct _objc_module *_POINTER_OBJC_MODULES = "; |
| Result += "&_OBJC_MODULES;\n"; |
| Result += "#pragma data_seg(pop)\n\n"; |
| } |
| } |
| |
| |
| |
| |