ClangPersistentVariables.cpp revision 360660 
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
22using namespace lldb;
23using namespace lldb_private;
24
25ClangPersistentVariables::ClangPersistentVariables()
26    : lldb_private::PersistentExpressionState(LLVMCastKind::eKindClang),
27      m_next_persistent_variable_id(0) {}
28
29ExpressionVariableSP ClangPersistentVariables::CreatePersistentVariable(
30    const lldb::ValueObjectSP &valobj_sp) {
31  return AddNewlyConstructedVariable(new ClangExpressionVariable(valobj_sp));
32}
33
34ExpressionVariableSP ClangPersistentVariables::CreatePersistentVariable(
35    ExecutionContextScope *exe_scope, ConstString name,
36    const CompilerType &compiler_type, lldb::ByteOrder byte_order,
37    uint32_t addr_byte_size) {
38  return AddNewlyConstructedVariable(new ClangExpressionVariable(
39      exe_scope, name, compiler_type, byte_order, addr_byte_size));
40}
41
42void ClangPersistentVariables::RemovePersistentVariable(
43    lldb::ExpressionVariableSP variable) {
44  RemoveVariable(variable);
45
46  const char *name = variable->GetName().AsCString();
47
48  if (*name != '$')
49    return;
50  name++;
51
52  if (strtoul(name, nullptr, 0) == m_next_persistent_variable_id - 1)
53    m_next_persistent_variable_id--;
54}
55
56llvm::Optional<CompilerType>
57ClangPersistentVariables::GetCompilerTypeFromPersistentDecl(
58    ConstString type_name) {
59  CompilerType compiler_type;
60  if (clang::TypeDecl *tdecl = llvm::dyn_cast_or_null<clang::TypeDecl>(
61          GetPersistentDecl(type_name))) {
62    compiler_type.SetCompilerType(
63        ClangASTContext::GetASTContext(&tdecl->getASTContext()),
64        reinterpret_cast<lldb::opaque_compiler_type_t>(
65            const_cast<clang::Type *>(tdecl->getTypeForDecl())));
66    return compiler_type;
67  }
68  return llvm::None;
69}
70
71void ClangPersistentVariables::RegisterPersistentDecl(ConstString name,
72                                                      clang::NamedDecl *decl) {
73  m_persistent_decls.insert(
74      std::pair<const char *, clang::NamedDecl *>(name.GetCString(), decl));
75
76  if (clang::EnumDecl *enum_decl = llvm::dyn_cast<clang::EnumDecl>(decl)) {
77    for (clang::EnumConstantDecl *enumerator_decl : enum_decl->enumerators()) {
78      m_persistent_decls.insert(std::pair<const char *, clang::NamedDecl *>(
79          ConstString(enumerator_decl->getNameAsString()).GetCString(),
80          enumerator_decl));
81    }
82  }
83}
84
85clang::NamedDecl *
86ClangPersistentVariables::GetPersistentDecl(ConstString name) {
87  PersistentDeclMap::const_iterator i =
88      m_persistent_decls.find(name.GetCString());
89
90  if (i == m_persistent_decls.end())
91    return nullptr;
92  else
93    return i->second;
94}
95