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modern objective-c translator: please symbols generated 

for @protocol expression into their own section.

llvm-svn: 152808
This commit is contained in:
Fariborz Jahanian 2012-03-15 17:05:33 +00:00
parent d9a909cd29
commit b31e3af6fb
1 changed files with 30 additions and 12 deletions
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42
clang/lib/Rewrite/RewriteModernObjC.cpp
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@ -2991,7 +2991,8 @@ QualType RewriteModernObjC::getProtocolType() {
/// The forward references (and metadata) are generated in
/// RewriteModernObjC::HandleTranslationUnit().
Stmt *RewriteModernObjC::RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp) {
std::string Name = "_OBJC_PROTOCOL_" + Exp->getProtocol()->getNameAsString();
std::string Name = "_OBJC_PROTOCOL_REFERENCE_$_" +
Exp->getProtocol()->getNameAsString();
IdentifierInfo *ID = &Context->Idents.get(Name);
VarDecl *VD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
SourceLocation(), ID, getProtocolType(), 0,
@ -4971,6 +4972,23 @@ void RewriteModernObjC::HandleDeclInMainFile(Decl *D) {
// Nothing yet.
}
/// Write_ProtocolExprReferencedMetadata - This routine writer out the
/// protocol reference symbols in the for of:
/// struct _protocol_t *PROTOCOL_REF = &PROTOCOL_METADATA.
static void Write_ProtocolExprReferencedMetadata(ASTContext *Context,
ObjCProtocolDecl *PDecl,
std::string &Result) {
// Also output .objc_protorefs$B section and its meta-data.
if (Context->getLangOpts().MicrosoftExt)
Result += "__declspec(allocate(\".objc_protorefs$B\")) ";
Result += "struct _protocol_t *";
Result += "_OBJC_PROTOCOL_REFERENCE_$_";
Result += PDecl->getNameAsString();
Result += " = &";
Result += "_OBJC_PROTOCOL_"; Result += PDecl->getNameAsString();
Result += ";\n";
}
void RewriteModernObjC::HandleTranslationUnit(ASTContext &C) {
if (Diags.hasErrorOccurred())
return;
@ -4980,8 +4998,10 @@ void RewriteModernObjC::HandleTranslationUnit(ASTContext &C) {
// Here's a great place to add any extra declarations that may be needed.
// Write out meta data for each @protocol(<expr>).
for (llvm::SmallPtrSet<ObjCProtocolDecl *,8>::iterator I = ProtocolExprDecls.begin(),
E = ProtocolExprDecls.end(); I != E; ++I)
E = ProtocolExprDecls.end(); I != E; ++I) {
RewriteObjCProtocolMetaData(*I, Preamble);
Write_ProtocolExprReferencedMetadata(Context, (*I), Preamble);
}
InsertText(SM->getLocForStartOfFile(MainFileID), Preamble, false);
for (unsigned i = 0, e = ObjCInterfacesSeen.size(); i < e; i++) {
@ -5046,15 +5066,7 @@ void RewriteModernObjC::Initialize(ASTContext &context) {
Preamble += "#pragma section(\".objc_imageinfo$B\", long, read, write)\n";
Preamble += "#pragma section(\".objc_nlclslist$B\", long, read, write)\n";
Preamble += "#pragma section(\".objc_nlcatlist$B\", long, read, write)\n";
// These need be generated. But they are not,using API calls instead.
Preamble += "#pragma section(\".objc_selrefs$B\", long, read, write)\n";
Preamble += "#pragma section(\".objc_classrefs$B\", long, read, write)\n";
Preamble += "#pragma section(\".objc_superrefs$B\", long, read, write)\n";
Preamble += "#pragma section(\".objc_protorefs$B\", long, read, write)\n";
// These are generated but not necessary for functionality.
Preamble += "#pragma section(\".datacoal_nt$B\", long, read, write)\n";
Preamble += "#pragma section(\".cat_cls_meth$B\", long, read, write)\n";
@ -5062,6 +5074,12 @@ void RewriteModernObjC::Initialize(ASTContext &context) {
Preamble += "#pragma section(\".cls_meth$B\", long, read, write)\n";
Preamble += "#pragma section(\".objc_ivar$B\", long, read, write)\n";
// These need be generated for performance. Currently they are not,
// using API calls instead.
Preamble += "#pragma section(\".objc_selrefs$B\", long, read, write)\n";
Preamble += "#pragma section(\".objc_classrefs$B\", long, read, write)\n";
Preamble += "#pragma section(\".objc_superrefs$B\", long, read, write)\n";
// Add a constructor for creating temporary objects.
Preamble += "__rw_objc_super(struct objc_object *o, struct objc_object *s) "
": ";
@ -5935,7 +5953,7 @@ void RewriteModernObjC::RewriteObjCProtocolMetaData(ObjCProtocolDecl *PDecl,
Result += "\n";
if (LangOpts.MicrosoftExt)
Result += "__declspec(allocate(\".datacoal_nt$B\")) ";
Result += "static struct _protocol_t _OBJC_PROTOCOL_";
Result += "struct _protocol_t _OBJC_PROTOCOL_";
Result += PDecl->getNameAsString();
Result += " __attribute__ ((used, section (\"__DATA,__datacoal_nt,coalesced\"))) = {\n";
Result += "\t0,\n"; // id is; is null
@ -6317,7 +6335,7 @@ void RewriteModernObjC::WriteImageInfo(std::string &Result) {
Result += "static struct IMAGE_INFO { unsigned version; unsigned flag; } ";
// version 0, ObjCABI is 2
Result += "L_OBJC_IMAGE_INFO = { 0, 2 };\n";
Result += "_OBJC_IMAGE_INFO = { 0, 2 };\n";
}
/// RewriteObjCCategoryImplDecl - Rewrite metadata for each category