1 //===-- ClangPersistentVariables.cpp ----------------------------*- C++ -*-===//
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 "ClangPersistentVariables.h"
10 
11 #include "lldb/Core/Value.h"
12 #include "lldb/Symbol/ClangASTContext.h"
13 #include "lldb/Target/Target.h"
14 #include "lldb/Utility/DataExtractor.h"
15 #include "lldb/Utility/Log.h"
16 #include "lldb/Utility/StreamString.h"
17 
18 #include "clang/AST/Decl.h"
19 
20 #include "llvm/ADT/StringMap.h"
21 
22 using namespace lldb;
23 using namespace lldb_private;
24 
25 ClangPersistentVariables::ClangPersistentVariables()
26     : lldb_private::PersistentExpressionState(LLVMCastKind::eKindClang) {}
27 
28 ExpressionVariableSP ClangPersistentVariables::CreatePersistentVariable(
29     const lldb::ValueObjectSP &valobj_sp) {
30   return AddNewlyConstructedVariable(new ClangExpressionVariable(valobj_sp));
31 }
32 
33 ExpressionVariableSP ClangPersistentVariables::CreatePersistentVariable(
34     ExecutionContextScope *exe_scope, ConstString name,
35     const CompilerType &compiler_type, lldb::ByteOrder byte_order,
36     uint32_t addr_byte_size) {
37   return AddNewlyConstructedVariable(new ClangExpressionVariable(
38       exe_scope, name, compiler_type, byte_order, addr_byte_size));
39 }
40 
41 void ClangPersistentVariables::RemovePersistentVariable(
42     lldb::ExpressionVariableSP variable) {
43   RemoveVariable(variable);
44 
45   const char *name = variable->GetName().AsCString();
46 
47   if (*name != '$')
48     return;
49   name++;
50 
51   if (strtoul(name, nullptr, 0) == m_next_persistent_variable_id - 1)
52     m_next_persistent_variable_id--;
53 }
54 
55 llvm::Optional<CompilerType>
56 ClangPersistentVariables::GetCompilerTypeFromPersistentDecl(
57     ConstString type_name) {
58   CompilerType compiler_type;
59   if (clang::TypeDecl *tdecl = llvm::dyn_cast_or_null<clang::TypeDecl>(
60           GetPersistentDecl(type_name))) {
61     compiler_type.SetCompilerType(
62         ClangASTContext::GetASTContext(&tdecl->getASTContext()),
63         reinterpret_cast<lldb::opaque_compiler_type_t>(
64             const_cast<clang::Type *>(tdecl->getTypeForDecl())));
65     return compiler_type;
66   }
67   return llvm::None;
68 }
69 
70 void ClangPersistentVariables::RegisterPersistentDecl(ConstString name,
71                                                       clang::NamedDecl *decl) {
72   m_persistent_decls.insert(
73       std::pair<const char *, clang::NamedDecl *>(name.GetCString(), decl));
74 
75   if (clang::EnumDecl *enum_decl = llvm::dyn_cast<clang::EnumDecl>(decl)) {
76     for (clang::EnumConstantDecl *enumerator_decl : enum_decl->enumerators()) {
77       m_persistent_decls.insert(std::pair<const char *, clang::NamedDecl *>(
78           ConstString(enumerator_decl->getNameAsString()).GetCString(),
79           enumerator_decl));
80     }
81   }
82 }
83 
84 clang::NamedDecl *
85 ClangPersistentVariables::GetPersistentDecl(ConstString name) {
86   PersistentDeclMap::const_iterator i =
87       m_persistent_decls.find(name.GetCString());
88 
89   if (i == m_persistent_decls.end())
90     return nullptr;
91   else
92     return i->second;
93 }
94