forked from OSchip/llvm-project
136 lines
4.6 KiB
C++
136 lines
4.6 KiB
C++
//===--- Mangle.cpp - Mangle C++ Names --------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Implements generic name mangling support for blocks and Objective-C.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/Mangle.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/Decl.h"
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#include "clang/AST/DeclCXX.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/AST/DeclTemplate.h"
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#include "clang/AST/ExprCXX.h"
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#include "clang/Basic/ABI.h"
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#include "clang/Basic/SourceManager.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Support/ErrorHandling.h"
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#define MANGLE_CHECKER 0
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#if MANGLE_CHECKER
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#include <cxxabi.h>
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#endif
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using namespace clang;
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// FIXME: For blocks we currently mimic GCC's mangling scheme, which leaves
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// much to be desired. Come up with a better mangling scheme.
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namespace {
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static void mangleFunctionBlock(MangleContext &Context,
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llvm::StringRef Outer,
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const BlockDecl *BD,
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llvm::raw_ostream &Out) {
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Out << "__" << Outer << "_block_invoke_" << Context.getBlockId(BD, true);
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}
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static void checkMangleDC(const DeclContext *DC, const BlockDecl *BD) {
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#ifndef NDEBUG
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const DeclContext *ExpectedDC = BD->getDeclContext();
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while (isa<BlockDecl>(ExpectedDC) || isa<EnumDecl>(ExpectedDC))
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ExpectedDC = ExpectedDC->getParent();
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assert(DC == ExpectedDC && "Given decl context did not match expected!");
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#endif
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}
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}
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void MangleContext::mangleGlobalBlock(const BlockDecl *BD,
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llvm::raw_ostream &Out) {
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Out << "__block_global_" << getBlockId(BD, false);
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}
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void MangleContext::mangleCtorBlock(const CXXConstructorDecl *CD,
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CXXCtorType CT, const BlockDecl *BD,
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llvm::raw_ostream &ResStream) {
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checkMangleDC(CD, BD);
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llvm::SmallString<64> Buffer;
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llvm::raw_svector_ostream Out(Buffer);
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mangleCXXCtor(CD, CT, Out);
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Out.flush();
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mangleFunctionBlock(*this, Buffer, BD, ResStream);
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}
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void MangleContext::mangleDtorBlock(const CXXDestructorDecl *DD,
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CXXDtorType DT, const BlockDecl *BD,
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llvm::raw_ostream &ResStream) {
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checkMangleDC(DD, BD);
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llvm::SmallString<64> Buffer;
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llvm::raw_svector_ostream Out(Buffer);
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mangleCXXDtor(DD, DT, Out);
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Out.flush();
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mangleFunctionBlock(*this, Buffer, BD, ResStream);
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}
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void MangleContext::mangleBlock(const DeclContext *DC, const BlockDecl *BD,
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llvm::raw_ostream &Out) {
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assert(!isa<CXXConstructorDecl>(DC) && !isa<CXXDestructorDecl>(DC));
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checkMangleDC(DC, BD);
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llvm::SmallString<64> Buffer;
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llvm::raw_svector_ostream Stream(Buffer);
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if (const ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(DC)) {
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mangleObjCMethodName(Method, Stream);
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} else {
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const NamedDecl *ND = cast<NamedDecl>(DC);
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if (IdentifierInfo *II = ND->getIdentifier())
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Stream << II->getName();
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else {
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// FIXME: We were doing a mangleUnqualifiedName() before, but that's
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// a private member of a class that will soon itself be private to the
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// Itanium C++ ABI object. What should we do now? Right now, I'm just
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// calling the mangleName() method on the MangleContext; is there a
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// better way?
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mangleName(ND, Stream);
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}
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}
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Stream.flush();
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mangleFunctionBlock(*this, Buffer, BD, Out);
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}
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void MangleContext::mangleObjCMethodName(const ObjCMethodDecl *MD,
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llvm::raw_ostream &Out) {
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llvm::SmallString<64> Name;
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llvm::raw_svector_ostream OS(Name);
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const ObjCContainerDecl *CD =
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dyn_cast<ObjCContainerDecl>(MD->getDeclContext());
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assert (CD && "Missing container decl in GetNameForMethod");
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OS << (MD->isInstanceMethod() ? '-' : '+') << '[' << CD->getName();
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if (const ObjCCategoryImplDecl *CID = dyn_cast<ObjCCategoryImplDecl>(CD))
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OS << '(' << CID << ')';
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OS << ' ' << MD->getSelector().getAsString() << ']';
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Out << OS.str().size() << OS.str();
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}
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void MangleContext::mangleBlock(const BlockDecl *BD,
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llvm::raw_ostream &Out) {
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const DeclContext *DC = BD->getDeclContext();
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while (isa<BlockDecl>(DC) || isa<EnumDecl>(DC))
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DC = DC->getParent();
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if (DC->isFunctionOrMethod())
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mangleBlock(DC, BD, Out);
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else
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mangleGlobalBlock(BD, Out);
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}
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