lldb/source/Plugins/ExpressionParser/Clang/ClangExternalASTSourceCallbacks.cpp

   1 //===-- ClangExternalASTSourceCallbacks.cpp -------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "Plugins/ExpressionParser/Clang/ClangExternalASTSourceCallbacks.h"
  10 #include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
  11
  12 #include "clang/AST/Decl.h"
  13 #include "clang/AST/DeclObjC.h"
  14 #include <optional>
  15
  16 using namespace lldb_private;
  17
  18 char ClangExternalASTSourceCallbacks::ID;
  19
  20 void ClangExternalASTSourceCallbacks::CompleteType(clang::TagDecl *tag_decl) {
  21   m_ast.CompleteTagDecl(tag_decl);
  22 }
  23
  24 void ClangExternalASTSourceCallbacks::CompleteType(
  25     clang::ObjCInterfaceDecl *objc_decl) {
  26   m_ast.CompleteObjCInterfaceDecl(objc_decl);
  27 }
  28
  29 bool ClangExternalASTSourceCallbacks::layoutRecordType(
  30     const clang::RecordDecl *Record, uint64_t &Size, uint64_t &Alignment,
  31     llvm::DenseMap<const clang::FieldDecl *, uint64_t> &FieldOffsets,
  32     llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &BaseOffsets,
  33     llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>
  34         &VirtualBaseOffsets) {
  35   return m_ast.LayoutRecordType(Record, Size, Alignment, FieldOffsets,
  36                                 BaseOffsets, VirtualBaseOffsets);
  37 }
  38
  39 void ClangExternalASTSourceCallbacks::FindExternalLexicalDecls(
  40     const clang::DeclContext *decl_ctx,
  41     llvm::function_ref<bool(clang::Decl::Kind)> IsKindWeWant,
  42     llvm::SmallVectorImpl<clang::Decl *> &decls) {
  43   if (decl_ctx) {
  44     clang::TagDecl *tag_decl = llvm::dyn_cast<clang::TagDecl>(
  45         const_cast<clang::DeclContext *>(decl_ctx));
  46     if (tag_decl)
  47       CompleteType(tag_decl);
  48   }
  49 }
  50
  51 bool ClangExternalASTSourceCallbacks::FindExternalVisibleDeclsByName(
  52     const clang::DeclContext *DC, clang::DeclarationName Name) {
  53   llvm::SmallVector<clang::NamedDecl *, 4> decls;
  54   // Objective-C methods are not added into the LookupPtr when they originate
  55   // from an external source. SetExternalVisibleDeclsForName() adds them.
  56   if (auto *oid = llvm::dyn_cast<clang::ObjCInterfaceDecl>(DC)) {
  57     clang::ObjCContainerDecl::method_range noload_methods(oid->noload_decls());
  58     for (auto *omd : noload_methods)
  59       if (omd->getDeclName() == Name)
  60         decls.push_back(omd);
  61   }
  62   return !SetExternalVisibleDeclsForName(DC, Name, decls).empty();
  63 }
  64
  65 OptionalClangModuleID
  66 ClangExternalASTSourceCallbacks::RegisterModule(clang::Module *module) {
  67   m_modules.push_back(module);
  68   unsigned id = m_modules.size();
  69   m_ids.insert({module, id});
  70   return OptionalClangModuleID(id);
  71 }
  72
  73 std::optional<clang::ASTSourceDescriptor>
  74 ClangExternalASTSourceCallbacks::getSourceDescriptor(unsigned id) {
  75   if (clang::Module *module = getModule(id))
  76     return {*module};
  77   return {};
  78 }
  79
  80 clang::Module *ClangExternalASTSourceCallbacks::getModule(unsigned id) {
  81   if (id && id <= m_modules.size())
  82     return m_modules[id - 1];
  83   return nullptr;
  84 }
  85
  86 OptionalClangModuleID
  87 ClangExternalASTSourceCallbacks::GetIDForModule(clang::Module *module) {
  88   return OptionalClangModuleID(m_ids[module]);
  89 }