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gerrit-public.fairphone.software / fp2-dev / platform / external / clang / 646b261662cd2bb3761480ff280f78bee08043d4 / . / Driver / RewriteTest.cpp
blob: 23bf240ac82e472a741efa3abd220cdc752c44ef [file] [log] [blame]
//===--- RewriteTest.cpp - Playground for the code rewriter ---------------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Chris Lattner and 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/Basic/SourceManager.h"
#include "clang/Basic/IdentifierTable.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "clang/Lex/Lexer.h"
#include <sstream>
using namespace clang;
using llvm::utostr;
namespace {
class RewriteTest : public ASTConsumer {
Rewriter Rewrite;
ASTContext *Context;
SourceManager *SM;
unsigned MainFileID;
SourceLocation LastIncLoc;
llvm::SmallVector<ObjcImplementationDecl *, 8> ClassImplementation;
llvm::SmallVector<ObjcCategoryImplDecl *, 8> CategoryImplementation;
llvm::SmallPtrSet<ObjcInterfaceDecl*, 8> ObjcSynthesizedStructs;
llvm::SmallPtrSet<ObjcInterfaceDecl*, 8> ObjcForwardDecls;
llvm::DenseMap<ObjcMethodDecl*, std::string> MethodInternalNames;
FunctionDecl *MsgSendFunctionDecl;
FunctionDecl *MsgSendSuperFunctionDecl;
FunctionDecl *GetClassFunctionDecl;
FunctionDecl *SelGetUidFunctionDecl;
FunctionDecl *CFStringFunctionDecl;
// ObjC string constant support.
FileVarDecl *ConstantStringClassReference;
RecordDecl *NSStringRecord;
// Needed for super.
ObjcMethodDecl *CurMethodDecl;
RecordDecl *SuperStructDecl;
static const int OBJC_ABI_VERSION =7 ;
public:
void Initialize(ASTContext &context, unsigned mainFileID) {
Context = &context;
SM = &Context->SourceMgr;
MainFileID = mainFileID;
MsgSendFunctionDecl = 0;
MsgSendSuperFunctionDecl = 0;
GetClassFunctionDecl = 0;
SelGetUidFunctionDecl = 0;
CFStringFunctionDecl = 0;
ConstantStringClassReference = 0;
NSStringRecord = 0;
CurMethodDecl = 0;
SuperStructDecl = 0;
Rewrite.setSourceMgr(Context->SourceMgr);
// declaring objc_selector outside the parameter list removes a silly
// scope related warning...
const char *s = "struct objc_selector; struct objc_class; struct objc_super;\n"
"extern struct objc_object *objc_msgSend"
"(struct objc_object *, struct objc_selector *, ...);\n"
"extern struct objc_object *objc_msgSendSuper"
"(struct objc_super *, struct objc_selector *, ...);\n"
"extern struct objc_object *objc_getClass"
"(const char *);\n"
"extern void objc_exception_throw(struct objc_object *);\n"
"extern void objc_exception_try_enter(void *);\n"
"extern void objc_exception_try_exit(void *);\n"
"extern struct objc_object *objc_exception_extract(void *);\n"
"extern int objc_exception_match"
"(struct objc_class *, struct objc_object *, ...);\n"
"#include <Objc/objc.h>\n";
Rewrite.InsertText(SourceLocation::getFileLoc(mainFileID, 0),
s, strlen(s));
}
// Top Level Driver code.
virtual void HandleTopLevelDecl(Decl *D);
void HandleDeclInMainFile(Decl *D);
~RewriteTest();
// Syntactic Rewriting.
void RewritePrologue(SourceLocation Loc);
void RewriteInclude(SourceLocation Loc);
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 RewriteMethodDeclarations(int nMethods, ObjcMethodDecl **Methods);
void RewriteProperties(int nProperties, ObjcPropertyDecl **Properties);
void RewriteFunctionDecl(FunctionDecl *FD);
void RewriteObjcQualifiedInterfaceTypes(
const FunctionTypeProto *proto, FunctionDecl *FD);
bool needToScanForQualifiers(QualType T);
ObjcInterfaceDecl *isSuperReceiver(Expr *recExpr);
QualType getSuperStructType();
// Expression Rewriting.
Stmt *RewriteFunctionBodyOrGlobalInitializer(Stmt *S);
Stmt *RewriteAtEncode(ObjCEncodeExpr *Exp);
Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV);
Stmt *RewriteAtSelector(ObjCSelectorExpr *Exp);
Stmt *RewriteMessageExpr(ObjCMessageExpr *Exp);
Stmt *RewriteObjCStringLiteral(ObjCStringLiteral *Exp);
Stmt *RewriteObjcTryStmt(ObjcAtTryStmt *S);
Stmt *RewriteObjcCatchStmt(ObjcAtCatchStmt *S);
Stmt *RewriteObjcFinallyStmt(ObjcAtFinallyStmt *S);
Stmt *RewriteObjcThrowStmt(ObjcAtThrowStmt *S);
CallExpr *SynthesizeCallToFunctionDecl(FunctionDecl *FD,
Expr **args, unsigned nargs);
void SynthMsgSendFunctionDecl();
void SynthMsgSendSuperFunctionDecl();
void SynthGetClassFunctionDecl();
void SynthCFStringFunctionDecl();
// Metadata emission.
void RewriteObjcClassMetaData(ObjcImplementationDecl *IDecl,
std::string &Result);
void RewriteObjcCategoryImplDecl(ObjcCategoryImplDecl *CDecl,
std::string &Result);
void RewriteObjcMethodsMetaData(ObjcMethodDecl *const*Methods,
int NumMethods,
bool IsInstanceMethod,
const char *prefix,
const char *ClassName,
std::string &Result);
void RewriteObjcProtocolsMetaData(ObjcProtocolDecl **Protocols,
int NumProtocols,
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);
};
}
ASTConsumer *clang::CreateCodeRewriterTest() { return new RewriteTest(); }
//===----------------------------------------------------------------------===//
// Top Level Driver Code
//===----------------------------------------------------------------------===//
void RewriteTest::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 (FileVarDecl *FVD = dyn_cast<FileVarDecl>(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->getDecomposedFileLoc(Loc).first == MainFileID)
return HandleDeclInMainFile(D);
// Otherwise, see if there is a #import in the main file that should be
// rewritten.
//RewriteInclude(Loc);
}
/// HandleDeclInMainFile - This is called for each top-level decl defined in the
/// main file of the input.
void RewriteTest::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)) {
if (VD->getInit())
RewriteFunctionBodyOrGlobalInitializer(VD->getInit());
}
// Nothing yet.
}
RewriteTest::~RewriteTest() {
// Get the top-level buffer that this corresponds to.
// Rewrite tabs if we care.
//RewriteTabs();
// 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");
std::string S(RewriteBuf->begin(), RewriteBuf->end());
printf("%s\n", S.c_str());
} else {
printf("No changes\n");
}
// Emit metadata.
printf("%s", ResultStr.c_str());
}
//===----------------------------------------------------------------------===//
// Syntactic (non-AST) Rewriting Code
//===----------------------------------------------------------------------===//
void RewriteTest::RewriteInclude(SourceLocation Loc) {
// Rip up the #include stack to the main file.
SourceLocation IncLoc = Loc, NextLoc = Loc;
do {
IncLoc = Loc;
Loc = SM->getLogicalLoc(NextLoc);
NextLoc = SM->getIncludeLoc(Loc);
} while (!NextLoc.isInvalid());
// Loc is now the location of the #include filename "foo" or <foo/bar.h>.
// IncLoc indicates the header that was included if it is useful.
IncLoc = SM->getLogicalLoc(IncLoc);
if (SM->getDecomposedFileLoc(Loc).first != MainFileID ||
Loc == LastIncLoc)
return;
LastIncLoc = Loc;
unsigned IncCol = SM->getColumnNumber(Loc);
SourceLocation LineStartLoc = Loc.getFileLocWithOffset(-IncCol+1);
// Replace the #import with #include.
Rewrite.ReplaceText(LineStartLoc, IncCol-1, "#include ", strlen("#include "));
}
void RewriteTest::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.
Rewrite.ReplaceText(TabLoc, 1, " ", Spaces);
}
}
void RewriteTest::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.
Rewrite.ReplaceText(startLoc, semiPtr-startBuf+1,
typedefString.c_str(), typedefString.size());
}
void RewriteTest::RewriteMethodDeclarations(int nMethods, ObjcMethodDecl **Methods) {
for (int i = 0; i < nMethods; i++) {
ObjcMethodDecl *Method = Methods[i];
SourceLocation LocStart = Method->getLocStart();
SourceLocation LocEnd = Method->getLocEnd();
if (SM->getLineNumber(LocEnd) > SM->getLineNumber(LocStart)) {
Rewrite.InsertText(LocStart, "/* ", 3);
Rewrite.ReplaceText(LocEnd, 1, ";*/ ", 4);
} else {
Rewrite.InsertText(LocStart, "// ", 3);
}
}
}
void RewriteTest::RewriteProperties(int nProperties, ObjcPropertyDecl **Properties)
{
for (int i = 0; i < nProperties; i++) {
ObjcPropertyDecl *Property = Properties[i];
SourceLocation Loc = Property->getLocation();
Rewrite.ReplaceText(Loc, 0, "// ", 3);
// FIXME: handle properties that are declared across multiple lines.
}
}
void RewriteTest::RewriteCategoryDecl(ObjcCategoryDecl *CatDecl) {
SourceLocation LocStart = CatDecl->getLocStart();
// FIXME: handle category headers that are declared across multiple lines.
Rewrite.ReplaceText(LocStart, 0, "// ", 3);
RewriteMethodDeclarations(CatDecl->getNumInstanceMethods(),
CatDecl->getInstanceMethods());
RewriteMethodDeclarations(CatDecl->getNumClassMethods(),
CatDecl->getClassMethods());
// Lastly, comment out the @end.
Rewrite.ReplaceText(CatDecl->getAtEndLoc(), 0, "// ", 3);
}
void RewriteTest::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.
Rewrite.ReplaceText(LocStart, 0, "// ", 3);
RewriteMethodDeclarations(PDecl->getNumInstanceMethods(),
PDecl->getInstanceMethods());
RewriteMethodDeclarations(PDecl->getNumClassMethods(),
PDecl->getClassMethods());
// Lastly, comment out the @end.
SourceLocation LocEnd = PDecl->getAtEndLoc();
Rewrite.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);
Rewrite.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);
Rewrite.ReplaceText(OptionalLoc, strlen("@required"),
CommentedRequired.c_str(), CommentedRequired.size());
}
}
}
void RewriteTest::RewriteForwardProtocolDecl(ObjcForwardProtocolDecl *PDecl) {
SourceLocation LocStart = PDecl->getLocation();
if (LocStart.isInvalid())
assert(false && "Invalid SourceLocation");
// FIXME: handle forward protocol that are declared across multiple lines.
Rewrite.ReplaceText(LocStart, 0, "// ", 3);
}
void RewriteTest::RewriteObjcMethodDecl(ObjcMethodDecl *OMD,
std::string &ResultStr) {
ResultStr += "\nstatic ";
ResultStr += OMD->getResultType().getAsString();
ResultStr += "\n";
// 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 '_'
const char *selName = OMD->getSelector().getName().c_str();
if (!strchr(selName, ':'))
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 (ObjcSynthesizedStructs.count(OMD->getClassInterface()))
ResultStr += "struct ";
ResultStr += selfTy.getAsString();
}
else
ResultStr += Context->getObjcIdType().getAsString();
ResultStr += " self, ";
ResultStr += Context->getObjcSelType().getAsString();
ResultStr += " _cmd";
// Method arguments.
for (int i = 0; i < OMD->getNumParams(); i++) {
ParmVarDecl *PDecl = OMD->getParamDecl(i);
ResultStr += ", ";
ResultStr += PDecl->getType().getAsString();
ResultStr += " ";
ResultStr += PDecl->getName();
}
ResultStr += ")";
}
void RewriteTest::RewriteImplementationDecl(NamedDecl *OID) {
ObjcImplementationDecl *IMD = dyn_cast<ObjcImplementationDecl>(OID);
ObjcCategoryImplDecl *CID = dyn_cast<ObjcCategoryImplDecl>(OID);
if (IMD)
Rewrite.InsertText(IMD->getLocStart(), "// ", 3);
else
Rewrite.InsertText(CID->getLocStart(), "// ", 3);
int numMethods = IMD ? IMD->getNumInstanceMethods()
: CID->getNumInstanceMethods();
for (int i = 0; i < numMethods; i++) {
std::string ResultStr;
ObjcMethodDecl *OMD;
if (IMD)
OMD = IMD->getInstanceMethods()[i];
else
OMD = CID->getInstanceMethods()[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);
Rewrite.ReplaceText(LocStart, endBuf-startBuf,
ResultStr.c_str(), ResultStr.size());
}
numMethods = IMD ? IMD->getNumClassMethods() : CID->getNumClassMethods();
for (int i = 0; i < numMethods; i++) {
std::string ResultStr;
ObjcMethodDecl *OMD;
if (IMD)
OMD = IMD->getClassMethods()[i];
else
OMD = CID->getClassMethods()[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);
Rewrite.ReplaceText(LocStart, endBuf-startBuf,
ResultStr.c_str(), ResultStr.size());
}
if (IMD)
Rewrite.InsertText(IMD->getLocEnd(), "// ", 3);
else
Rewrite.InsertText(CID->getLocEnd(), "// ", 3);
}
void RewriteTest::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());
RewriteMethodDeclarations(ClassDecl->getNumInstanceMethods(),
ClassDecl->getInstanceMethods());
RewriteMethodDeclarations(ClassDecl->getNumClassMethods(),
ClassDecl->getClassMethods());
// Lastly, comment out the @end.
Rewrite.ReplaceText(ClassDecl->getAtEndLoc(), 0, "// ", 3);
}
Stmt *RewriteTest::RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV) {
ObjcIvarDecl *D = IV->getDecl();
if (IV->isFreeIvar()) {
Expr *Replacement = new MemberExpr(IV->getBase(), true, D,
IV->getLocation());
Rewrite.ReplaceStmt(IV, Replacement);
delete IV;
return Replacement;
} else {
if (CurMethodDecl) {
if (const PointerType *pType = IV->getBase()->getType()->getAsPointerType()) {
ObjcInterfaceType *intT = dyn_cast<ObjcInterfaceType>(pType->getPointeeType());
if (CurMethodDecl->getClassInterface() == intT->getDecl()) {
IdentifierInfo *II = intT->getDecl()->getIdentifier();
RecordDecl *RD = new RecordDecl(Decl::Struct, SourceLocation(),
II, 0);
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(SourceLocation(), SourceLocation(), castExpr);
Rewrite.ReplaceStmt(IV->getBase(), PE);
delete IV->getBase();
return PE;
}
}
}
return IV;
}
}
//===----------------------------------------------------------------------===//
// Function Body / Expression rewriting
//===----------------------------------------------------------------------===//
Stmt *RewriteTest::RewriteFunctionBodyOrGlobalInitializer(Stmt *S) {
// Otherwise, just rewrite 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);
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 Rewrite.InsertText(clang::SourceLocation, char const*, unsigned int).
// Rewrite.InsertText(startLoc, messString.c_str(), messString.size());
// Tried this, but it didn't work either...
// Rewrite.ReplaceText(startLoc, 0, messString.c_str(), messString.size());
return RewriteMessageExpr(MessExpr);
}
if (ObjcAtTryStmt *StmtTry = dyn_cast<ObjcAtTryStmt>(S))
return RewriteObjcTryStmt(StmtTry);
if (ObjcAtThrowStmt *StmtThrow = dyn_cast<ObjcAtThrowStmt>(S))
return RewriteObjcThrowStmt(StmtThrow);
#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]);
Rewrite.InsertText(ICE->getSubExpr()->getLocStart(), &Str[0], Str.size());
delete S;
return Replacement;
}
#endif
// Return this stmt unmodified.
return S;
}
Stmt *RewriteTest::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";
Rewrite.ReplaceText(startLoc, 4, buf.c_str(), buf.size());
startLoc = S->getTryBody()->getLocEnd();
startBuf = SM->getCharacterData(startLoc);
assert((*startBuf == '}') && "bogus @try block");
SourceLocation lastCurlyLoc = startLoc;
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 */";
Rewrite.InsertText(startLoc, buf.c_str(), buf.size());
bool sawIdTypedCatch = false;
Stmt *lastCatchBody = 0;
ObjcAtCatchStmt *catchList = S->getCatchStmts();
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 (DeclStmt *declStmt = dyn_cast<DeclStmt>(catchStmt)) {
QualType t = dyn_cast<ValueDecl>(declStmt->getDecl())->getType();
if (t == Context->getObjcIdType()) {
buf += "1) { ";
Rewrite.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)) { ";
Rewrite.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).
Rewrite.ReplaceText(rParenLoc, bodyBuf-rParenBuf+1,
buf.c_str(), buf.size());
} else if (!isa<NullStmt>(catchStmt)) {
assert(false && "@catch rewrite bug");
}
catchList = catchList->getNextCatchStmt();
}
// Complete the catch list...
if (lastCatchBody) {
SourceLocation bodyLoc = lastCatchBody->getLocEnd();
const char *bodyBuf = SM->getCharacterData(bodyLoc);
assert((*bodyBuf == '}') && "bogus @catch body location");
bodyLoc = bodyLoc.getFileLocWithOffset(1);
buf = " } } /* @catch end */\n";
Rewrite.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 */";
Rewrite.ReplaceText(startLoc, 8, buf.c_str(), buf.size());
Stmt *body = finalStmt->getFinallyBody();
SourceLocation startLoc = body->getLocStart();
SourceLocation endLoc = body->getLocEnd();
const char *startBuf = SM->getCharacterData(startLoc);
const char *endBuf = SM->getCharacterData(endLoc);
assert((*startBuf == '{') && "bogus @finally body location");
assert((*endBuf == '}') && "bogus @finally body location");
startLoc = startLoc.getFileLocWithOffset(1);
buf = " if (!_rethrow) objc_exception_try_exit(&_stack);\n";
Rewrite.InsertText(startLoc, buf.c_str(), buf.size());
endLoc = endLoc.getFileLocWithOffset(-1);
buf = " if (_rethrow) objc_exception_throw(_rethrow);\n";
Rewrite.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";
Rewrite.InsertText(lastCurlyLoc, buf.c_str(), buf.size());
return 0;
}
Stmt *RewriteTest::RewriteObjcCatchStmt(ObjcAtCatchStmt *S) {
return 0;
}
Stmt *RewriteTest::RewriteObjcFinallyStmt(ObjcAtFinallyStmt *S) {
return 0;
}
// This can't be done with Rewrite.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 *RewriteTest::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)); */
buf = "objc_exception_throw(";
Rewrite.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 = ");";
Rewrite.ReplaceText(semiLoc, 1, buf.c_str(), buf.size());
return 0;
}
Stmt *RewriteTest::RewriteAtEncode(ObjCEncodeExpr *Exp) {
// Create a new string expression.
QualType StrType = Context->getPointerType(Context->CharTy);
std::string StrEncoding;
Context->getObjcEncodingForType(Exp->getEncodedType(), StrEncoding);
Expr *Replacement = new StringLiteral(StrEncoding.c_str(),
StrEncoding.length(), false, StrType,
SourceLocation(), SourceLocation());
Rewrite.ReplaceStmt(Exp, Replacement);
delete Exp;
return Replacement;
}
Stmt *RewriteTest::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());
Rewrite.ReplaceStmt(Exp, SelExp);
delete Exp;
return SelExp;
}
CallExpr *RewriteTest::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;
}
bool RewriteTest::needToScanForQualifiers(QualType T) {
// FIXME: we don't currently represent "id <Protocol>" in the type system.
if (T == Context->getObjcIdType())
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 RewriteTest::RewriteObjcQualifiedInterfaceTypes(
const FunctionTypeProto *proto, FunctionDecl *FD) {
if (needToScanForQualifiers(proto->getResultType())) {
// Since types are unique, we need to scan the buffer.
SourceLocation Loc = FD->getLocation();
const char *endBuf = SM->getCharacterData(Loc);
const char *startBuf = endBuf;
while (*startBuf != ';')
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.
Rewrite.InsertText(LessLoc, "/*", 2);
Rewrite.InsertText(GreaterLoc, "*/", 2);
}
}
// Now check arguments.
for (unsigned i = 0; i < proto->getNumArgs(); i++) {
if (needToScanForQualifiers(proto->getArgType(i))) {
// Since types are unique, we need to scan the buffer.
SourceLocation Loc = FD->getLocation();
const char *startBuf = SM->getCharacterData(Loc);
const char *endBuf = startBuf;
while (*endBuf != ';')
endBuf++; // scan forward (from the decl location) for argument types.
const char *startRef = 0, *endRef = 0;
if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
// Get the locations of the startRef, endRef.
SourceLocation LessLoc = Loc.getFileLocWithOffset(startRef-startBuf);
SourceLocation GreaterLoc = Loc.getFileLocWithOffset(endRef-startBuf+1);
// Comment out the protocol references.
Rewrite.InsertText(LessLoc, "/*", 2);
Rewrite.InsertText(GreaterLoc, "*/", 2);
}
}
}
}
void RewriteTest::RewriteFunctionDecl(FunctionDecl *FD) {
// declared in <objc/objc.h>
if (strcmp(FD->getName(), "sel_registerName") == 0) {
SelGetUidFunctionDecl = FD;
return;
}
// 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");
if (const FunctionTypeProto *proto = dyn_cast<FunctionTypeProto>(funcType))
RewriteObjcQualifiedInterfaceTypes(proto, FD);
}
// SynthMsgSendFunctionDecl - id objc_msgSend(id self, SEL op, ...);
void RewriteTest::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 = new FunctionDecl(SourceLocation(),
msgSendIdent, msgSendType,
FunctionDecl::Extern, false, 0);
}
// SynthMsgSendSuperFunctionDecl - id objc_msgSendSuper(struct objc_super *, SEL op, ...);
void RewriteTest::SynthMsgSendSuperFunctionDecl() {
IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSendSuper");
llvm::SmallVector<QualType, 16> ArgTys;
RecordDecl *RD = new RecordDecl(Decl::Struct, 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 = new FunctionDecl(SourceLocation(),
msgSendIdent, msgSendType,
FunctionDecl::Extern, false, 0);
}
// SynthGetClassFunctionDecl - id objc_getClass(const char *name);
void RewriteTest::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 = new FunctionDecl(SourceLocation(),
getClassIdent, getClassType,
FunctionDecl::Extern, false, 0);
}
// SynthCFStringFunctionDecl - id __builtin___CFStringMakeConstantString(const char *name);
void RewriteTest::SynthCFStringFunctionDecl() {
IdentifierInfo *getClassIdent = &Context->Idents.get("__builtin___CFStringMakeConstantString");
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*/);
CFStringFunctionDecl = new FunctionDecl(SourceLocation(),
getClassIdent, getClassType,
FunctionDecl::Extern, false, 0);
}
Stmt *RewriteTest::RewriteObjCStringLiteral(ObjCStringLiteral *Exp) {
#if 1
// This rewrite is specific to GCC, which has builtin support for CFString.
if (!CFStringFunctionDecl)
SynthCFStringFunctionDecl();
// Create a call to __builtin___CFStringMakeConstantString("cstr").
llvm::SmallVector<Expr*, 8> StrExpr;
StrExpr.push_back(Exp->getString());
CallExpr *call = SynthesizeCallToFunctionDecl(CFStringFunctionDecl,
&StrExpr[0], StrExpr.size());
// cast to NSConstantString *
CastExpr *cast = new CastExpr(Exp->getType(), call, SourceLocation());
Rewrite.ReplaceStmt(Exp, cast);
delete Exp;
return cast;
#else
assert(ConstantStringClassReference && "Can't find constant string reference");
llvm::SmallVector<Expr*, 4> InitExprs;
// Synthesize "(Class)&_NSConstantStringClassReference"
DeclRefExpr *ClsRef = new DeclRefExpr(ConstantStringClassReference,
ConstantStringClassReference->getType(),
SourceLocation());
QualType expType = Context->getPointerType(ClsRef->getType());
UnaryOperator *Unop = new UnaryOperator(ClsRef, UnaryOperator::AddrOf,
expType, SourceLocation());
CastExpr *cast = new CastExpr(Context->getObjcClassType(), Unop,
SourceLocation());
InitExprs.push_back(cast); // set the 'isa'.
InitExprs.push_back(Exp->getString()); // set "char *bytes".
unsigned IntSize = static_cast<unsigned>(
Context->getTypeSize(Context->IntTy, Exp->getLocStart()));
llvm::APInt IntVal(IntSize, Exp->getString()->getByteLength());
IntegerLiteral *len = new IntegerLiteral(IntVal, Context->IntTy,
Exp->getLocStart());
InitExprs.push_back(len); // set "int numBytes".
// struct NSConstantString
QualType CFConstantStrType = Context->getCFConstantStringType();
// (struct NSConstantString) { <exprs from above> }
InitListExpr *ILE = new InitListExpr(SourceLocation(),
&InitExprs[0], InitExprs.size(),
SourceLocation());
CompoundLiteralExpr *StrRep = new CompoundLiteralExpr(CFConstantStrType, ILE);
// struct NSConstantString *
expType = Context->getPointerType(StrRep->getType());
Unop = new UnaryOperator(StrRep, UnaryOperator::AddrOf, expType,
SourceLocation());
// cast to NSConstantString *
cast = new CastExpr(Exp->getType(), Unop, SourceLocation());
Rewrite.ReplaceStmt(Exp, cast);
delete Exp;
return cast;
#endif
}
ObjcInterfaceDecl *RewriteTest::isSuperReceiver(Expr *recExpr) {
if (CurMethodDecl) { // check if we are sending a message to 'super'
if (CastExpr *CE = dyn_cast<CastExpr>(recExpr)) {
if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CE->getSubExpr())) {
if (ParmVarDecl *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl())) {
if (!strcmp(PVD->getName(), "self")) {
if (const PointerType *PT = CE->getType()->getAsPointerType()) {
if (ObjcInterfaceType *IT =
dyn_cast<ObjcInterfaceType>(PT->getPointeeType())) {
if (IT->getDecl() ==
CurMethodDecl->getClassInterface()->getSuperClass())
return IT->getDecl();
}
}
}
}
}
}
}
return 0;
}
// struct objc_super { struct objc_object *receiver; struct objc_class *super; };
QualType RewriteTest::getSuperStructType() {
if (!SuperStructDecl) {
SuperStructDecl = new RecordDecl(Decl::Struct, 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] = new FieldDecl(SourceLocation(), 0, FieldTypes[i]);
SuperStructDecl->defineBody(FieldDecls, 4);
}
return Context->getTagDeclType(SuperStructDecl);
}
Stmt *RewriteTest::RewriteMessageExpr(ObjCMessageExpr *Exp) {
assert(SelGetUidFunctionDecl && "Can't find sel_registerName() decl");
if (!MsgSendFunctionDecl)
SynthMsgSendFunctionDecl();
if (!MsgSendSuperFunctionDecl)
SynthMsgSendSuperFunctionDecl();
if (!GetClassFunctionDecl)
SynthGetClassFunctionDecl();
// default to objc_msgSend().
FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
// 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.
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 *ID = isSuperReceiver(recExpr)) {
MsgSendFlavor = MsgSendSuperFunctionDecl;
assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
llvm::SmallVector<Expr*, 4> InitExprs;
InitExprs.push_back(recExpr); // set the 'receiver'.
llvm::SmallVector<Expr*, 8> ClsExprs;
QualType argType = Context->getPointerType(Context->CharTy);
ClsExprs.push_back(new StringLiteral(ID->getIdentifier()->getName(),
ID->getIdentifier()->getLength(),
false, argType, SourceLocation(),
SourceLocation()));
CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl,
&ClsExprs[0], ClsExprs.size());
InitExprs.push_back(Cls); // set 'super class', using objc_getClass().
// struct objc_super
QualType superType = getSuperStructType();
// (struct objc_super) { <exprs from above> }
InitListExpr *ILE = new InitListExpr(SourceLocation(),
&InitExprs[0], InitExprs.size(),
SourceLocation());
CompoundLiteralExpr *SuperRep = new CompoundLiteralExpr(superType, ILE);
// struct objc_super *
Expr *Unop = new UnaryOperator(SuperRep, UnaryOperator::AddrOf,
Context->getPointerType(SuperRep->getType()),
SourceLocation());
MsgExprs.push_back(Unop);
} else {
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(), 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 (int i = 0; i < mDecl->getNumParams(); i++) {
QualType t = mDecl->getParamDecl(i)->getType();
ArgTypes.push_back(t);
}
returnType = 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(),
Exp->getMethodDecl()->isVariadic());
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());
// Now do the actual rewrite.
Rewrite.ReplaceStmt(Exp, CE);
delete Exp;
return CE;
}
/// SynthesizeObjcInternalStruct - Rewrite one internal struct corresponding to
/// an objective-c class with ivars.
void RewriteTest::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();
if (RCDecl && !ObjcSynthesizedStructs.count(RCDecl)) {
// Do it for the root
SynthesizeObjcInternalStruct(RCDecl, Result);
}
int NumIvars = CDecl->getNumInstanceVariables();
// 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 (NumIvars <= 0 && (!RCDecl || !ObjcSynthesizedStructs.count(RCDecl)))
return;
// FIXME: This has potential of causing problem. If
// SynthesizeObjcInternalStruct is ever called recursively.
Result += "\nstruct ";
Result += CDecl->getName();
SourceLocation LocStart = CDecl->getLocStart();
SourceLocation LocEnd = CDecl->getLocEnd();
const char *startBuf = SM->getCharacterData(LocStart);
const char *endBuf = SM->getCharacterData(LocEnd);
if (NumIvars > 0) {
const char *cursor = strchr(startBuf, '{');
assert((cursor && endBuf)
&& "SynthesizeObjcInternalStruct - malformed @interface");
// rewrite the original header *without* disturbing the '{'
Rewrite.ReplaceText(LocStart, cursor-startBuf-1,
Result.c_str(), Result.size());
if (RCDecl && ObjcSynthesizedStructs.count(RCDecl)) {
Result = "\n struct ";
Result += RCDecl->getName();
Result += " _";
Result += RCDecl->getName();
Result += ";\n";
// insert the super class structure definition.
SourceLocation OnePastCurly = LocStart.getFileLocWithOffset(cursor-startBuf+1);
Rewrite.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, "protected", strlen("protected")))
Rewrite.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);
Rewrite.InsertText(atLoc, "/* ", 3);
cursor = strchr(cursor, '>');
cursor++;
atLoc = LocStart.getFileLocWithOffset(cursor-startBuf);
Rewrite.InsertText(atLoc, " */", 3);
}
cursor++;
}
// Don't forget to add a ';'!!
Rewrite.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 += " _";
Result += RCDecl->getName();
Result += ";\n};\n";
Rewrite.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 RewriteTest::RewriteObjcMethodsMetaData(ObjcMethodDecl *const*Methods,
int NumMethods,
bool IsInstanceMethod,
const char *prefix,
const char *ClassName,
std::string &Result) {
static bool objc_impl_method = false;
if (NumMethods > 0 && !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";
/* struct _objc_method_list {
struct _objc_method_list *next_method;
int method_count;
struct _objc_method method_list[];
}
*/
Result += "\nstruct _objc_method_list {\n";
Result += "\tstruct _objc_method_list *next_method;\n";
Result += "\tint method_count;\n";
Result += "\tstruct _objc_method method_list[];\n};\n";
objc_impl_method = true;
}
// Build _objc_method_list for class's methods if needed
if (NumMethods > 0) {
Result += "\nstatic struct _objc_method_list _OBJC_";
Result += prefix;
Result += IsInstanceMethod ? "INSTANCE" : "CLASS";
Result += "_METHODS_";
Result += ClassName;
Result += " __attribute__ ((section (\"__OBJC, __";
Result += IsInstanceMethod ? "inst" : "cls";
Result += "_meth\")))= ";
Result += "{\n\t0, " + utostr(NumMethods) + "\n";
Result += "\t,{{(SEL)\"";
Result += Methods[0]->getSelector().getName().c_str();
std::string MethodTypeString;
Context->getObjcEncodingForMethodDecl(Methods[0], MethodTypeString);
Result += "\", \"";
Result += MethodTypeString;
Result += "\", ";
Result += MethodInternalNames[Methods[0]];
Result += "}\n";
for (int i = 1; i < NumMethods; i++) {
Result += "\t ,{(SEL)\"";
Result += Methods[i]->getSelector().getName().c_str();
std::string MethodTypeString;
Context->getObjcEncodingForMethodDecl(Methods[i], MethodTypeString);
Result += "\", \"";
Result += MethodTypeString;
Result += "\", ";
Result += MethodInternalNames[Methods[i]];
Result += "}\n";
}
Result += "\t }\n};\n";
}
}
/// RewriteObjcProtocolsMetaData - Rewrite protocols meta-data.
void RewriteTest::RewriteObjcProtocolsMetaData(ObjcProtocolDecl **Protocols,
int NumProtocols,
const char *prefix,
const char *ClassName,
std::string &Result) {
static bool objc_protocol_methods = false;
if (NumProtocols > 0) {
for (int i = 0; i < NumProtocols; i++) {
ObjcProtocolDecl *PDecl = Protocols[i];
// Output struct protocol_methods holder of method selector and type.
if (!objc_protocol_methods &&
(PDecl->getNumInstanceMethods() > 0
|| PDecl->getNumClassMethods() > 0)) {
/* struct protocol_methods {
SEL _cmd;
char *method_types;
}
*/
Result += "\nstruct protocol_methods {\n";
Result += "\tSEL _cmd;\n";
Result += "\tchar *method_types;\n";
Result += "};\n";
/* struct _objc_protocol_method_list {
int protocol_method_count;
struct protocol_methods protocols[];
}
*/
Result += "\nstruct _objc_protocol_method_list {\n";
Result += "\tint protocol_method_count;\n";
Result += "\tstruct protocol_methods protocols[];\n};\n";
objc_protocol_methods = true;
}
// Output instance methods declared in this protocol.
int NumMethods = PDecl->getNumInstanceMethods();
if (NumMethods > 0) {
Result += "\nstatic struct _objc_protocol_method_list "
"_OBJC_PROTOCOL_INSTANCE_METHODS_";
Result += PDecl->getName();
Result += " __attribute__ ((section (\"__OBJC, __cat_inst_meth\")))= "
"{\n\t" + utostr(NumMethods) + "\n";
ObjcMethodDecl **Methods = PDecl->getInstanceMethods();
Result += "\t,{{(SEL)\"";
Result += Methods[0]->getSelector().getName().c_str();
Result += "\", \"\"}\n";
for (int i = 1; i < NumMethods; i++) {
Result += "\t ,{(SEL)\"";
Result += Methods[i]->getSelector().getName().c_str();
std::string MethodTypeString;
Context->getObjcEncodingForMethodDecl(Methods[i], MethodTypeString);
Result += "\", \"";
Result += MethodTypeString;
Result += "\"}\n";
}
Result += "\t }\n};\n";
}
// Output class methods declared in this protocol.
NumMethods = PDecl->getNumClassMethods();
if (NumMethods > 0) {
Result += "\nstatic struct _objc_protocol_method_list "
"_OBJC_PROTOCOL_CLASS_METHODS_";
Result += PDecl->getName();
Result += " __attribute__ ((section (\"__OBJC, __cat_cls_meth\")))= "
"{\n\t";
Result += utostr(NumMethods);
Result += "\n";
ObjcMethodDecl **Methods = PDecl->getClassMethods();
Result += "\t,{{(SEL)\"";
Result += Methods[0]->getSelector().getName().c_str();
Result += "\", \"\"}\n";
for (int i = 1; i < NumMethods; i++) {
Result += "\t ,{(SEL)\"";
Result += Methods[i]->getSelector().getName().c_str();
std::string MethodTypeString;
Context->getObjcEncodingForMethodDecl(Methods[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";
/* struct _objc_protocol_list {
struct _objc_protocol_list *next;
int protocol_count;
struct _objc_protocol *class_protocols[];
}
*/
Result += "\nstruct _objc_protocol_list {\n";
Result += "\tstruct _objc_protocol_list *next;\n";
Result += "\tint protocol_count;\n";
Result += "\tstruct _objc_protocol *class_protocols[];\n";
Result += "};\n";
objc_protocol = true;
}
Result += "\nstatic struct _objc_protocol _OBJC_PROTOCOL_";
Result += PDecl->getName();
Result += " __attribute__ ((section (\"__OBJC, __protocol\")))= "
"{\n\t0, \"";
Result += PDecl->getName();
Result += "\", 0, ";
if (PDecl->getInstanceMethods() > 0) {
Result += "&_OBJC_PROTOCOL_INSTANCE_METHODS_";
Result += PDecl->getName();
Result += ", ";
}
else
Result += "0, ";
if (PDecl->getClassMethods() > 0) {
Result += "&_OBJC_PROTOCOL_CLASS_METHODS_";
Result += PDecl->getName();
Result += "\n";
}
else
Result += "0\n";
Result += "};\n";
}
// Output the top lovel protocol meta-data for the class.
Result += "\nstatic struct _objc_protocol_list _OBJC_";
Result += prefix;
Result += "_PROTOCOLS_";
Result += ClassName;
Result += " __attribute__ ((section (\"__OBJC, __cat_cls_meth\")))= "
"{\n\t0, ";
Result += utostr(NumProtocols);
Result += "\n";
Result += "\t,{&_OBJC_PROTOCOL_";
Result += Protocols[0]->getName();
Result += " \n";
for (int i = 1; i < NumProtocols; i++) {
ObjcProtocolDecl *PDecl = Protocols[i];
Result += "\t ,&_OBJC_PROTOCOL_";
Result += PDecl->getName();
Result += "\n";
}
Result += "\t }\n};\n";
}
}
/// RewriteObjcCategoryImplDecl - Rewrite metadata for each category
/// implementation.
void RewriteTest::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;
char *FullCategoryName = (char*)alloca(
strlen(ClassDecl->getName()) + strlen(IDecl->getName()) + 2);
sprintf(FullCategoryName, "%s_%s", ClassDecl->getName(), IDecl->getName());
// Build _objc_method_list for class's instance methods if needed
RewriteObjcMethodsMetaData(IDecl->getInstanceMethods(),
IDecl->getNumInstanceMethods(),
true,
"CATEGORY_", FullCategoryName, Result);
// Build _objc_method_list for class's class methods if needed
RewriteObjcMethodsMetaData(IDecl->getClassMethods(),
IDecl->getNumClassMethods(),
false,
"CATEGORY_", FullCategoryName, Result);
// Protocols referenced in class declaration?
// Null CDecl is case of a category implementation with no category interface
if (CDecl)
RewriteObjcProtocolsMetaData(CDecl->getReferencedProtocols(),
CDecl->getNumReferencedProtocols(),
"CATEGORY",
FullCategoryName, 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__ ((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->getNumReferencedProtocols() > 0) {
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 RewriteTest::SynthesizeIvarOffsetComputation(ObjcImplementationDecl *IDecl,
ObjcIvarDecl *ivar,
std::string &Result) {
Result += "offsetof(struct ";
Result += IDecl->getName();
Result += ", ";
Result += ivar->getName();
Result += ")";
}
//===----------------------------------------------------------------------===//
// Meta Data Emission
//===----------------------------------------------------------------------===//
void RewriteTest::RewriteObjcClassMetaData(ObjcImplementationDecl *IDecl,
std::string &Result) {
ObjcInterfaceDecl *CDecl = IDecl->getClassInterface();
// Build _objc_ivar_list metadata for classes ivars if needed
int NumIvars = IDecl->getImplDeclNumIvars() > 0
? IDecl->getImplDeclNumIvars()
: (CDecl ? CDecl->getNumInstanceVariables() : 0);
SynthesizeObjcInternalStruct(CDecl, Result);
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";
/* struct _objc_ivar_list {
int ivar_count;
struct _objc_ivar ivar_list[];
};
*/
Result += "\nstruct _objc_ivar_list {\n";
Result += "\tint ivar_count;\n";
Result += "\tstruct _objc_ivar ivar_list[];\n};\n";
objc_ivar = true;
}
Result += "\nstatic struct _objc_ivar_list _OBJC_INSTANCE_VARIABLES_";
Result += IDecl->getName();
Result += " __attribute__ ((section (\"__OBJC, __instance_vars\")))= "
"{\n\t";
Result += utostr(NumIvars);
Result += "\n";
ObjcIvarDecl **Ivars = IDecl->getImplDeclIVars()
? IDecl->getImplDeclIVars()
: CDecl->getInstanceVariables();
Result += "\t,{{\"";
Result += Ivars[0]->getName();
Result += "\", \"";
std::string StrEncoding;
Context->getObjcEncodingForType(Ivars[0]->getType(), StrEncoding);
Result += StrEncoding;
Result += "\", ";
SynthesizeIvarOffsetComputation(IDecl, Ivars[0], Result);
Result += "}\n";
for (int i = 1; i < NumIvars; i++) {
Result += "\t ,{\"";
Result += Ivars[i]->getName();
Result += "\", \"";
std::string StrEncoding;
Context->getObjcEncodingForType(Ivars[i]->getType(), StrEncoding);
Result += StrEncoding;
Result += "\", ";
SynthesizeIvarOffsetComputation(IDecl, Ivars[i], Result);
Result += "}\n";
}
Result += "\t }\n};\n";
}
// Build _objc_method_list for class's instance methods if needed
RewriteObjcMethodsMetaData(IDecl->getInstanceMethods(),
IDecl->getNumInstanceMethods(),
true,
"", IDecl->getName(), Result);
// Build _objc_method_list for class's class methods if needed
RewriteObjcMethodsMetaData(IDecl->getClassMethods(),
IDecl->getNumClassMethods(),
false,
"", IDecl->getName(), Result);
// Protocols referenced in class declaration?
RewriteObjcProtocolsMetaData(CDecl->getReferencedProtocols(),
CDecl->getNumIntfRefProtocols(),
"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__ ((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 += "\"";
}
// TODO: 'ivars' field for root class is currently set to 0.
// 'info' field is initialized to CLS_META(2) for metaclass
Result += ", 0,2, sizeof(struct _objc_class), 0";
if (CDecl->getNumClassMethods() > 0) {
Result += "\n\t, &_OBJC_CLASS_METHODS_";
Result += CDecl->getName();
Result += "\n";
}
else
Result += ", 0\n";
if (CDecl->getNumIntfRefProtocols() > 0) {
Result += "\t,0, &_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__ ((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();
Result += ")";
}
if (NumIvars > 0) {
Result += ", &_OBJC_INSTANCE_VARIABLES_";
Result += CDecl->getName();
Result += "\n\t";
}
else
Result += ",0";
if (IDecl->getNumInstanceMethods() > 0) {
Result += ", &_OBJC_INSTANCE_METHODS_";
Result += CDecl->getName();
Result += ", 0\n\t";
}
else
Result += ",0,0";
if (CDecl->getNumIntfRefProtocols() > 0) {
Result += ", &_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 RewriteTest::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 use of offsetof
Result += "#include <stddef.h>\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__((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__ ((section (\"__OBJC, __module_info\")))= {\n";
Result += "\t" + utostr(OBJC_ABI_VERSION) +
", sizeof(struct _objc_module), \"\", &_OBJC_SYMBOLS\n";
Result += "};\n\n";
}