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//===-- ClangPersistentVariables.cpp ----------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "ClangPersistentVariables.h"
#include "lldb/Core/Value.h"
#include "lldb/Symbol/ClangASTContext.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/DataExtractor.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/StreamString.h"
#include "clang/AST/Decl.h"
#include "llvm/ADT/StringMap.h"
using namespace lldb;
using namespace lldb_private;
ClangPersistentVariables::ClangPersistentVariables()
: lldb_private::PersistentExpressionState(LLVMCastKind::eKindClang) {}
ExpressionVariableSP ClangPersistentVariables::CreatePersistentVariable(
const lldb::ValueObjectSP &valobj_sp) {
return AddNewlyConstructedVariable(new ClangExpressionVariable(valobj_sp));
}
ExpressionVariableSP ClangPersistentVariables::CreatePersistentVariable(
ExecutionContextScope *exe_scope, ConstString name,
const CompilerType &compiler_type, lldb::ByteOrder byte_order,
uint32_t addr_byte_size) {
return AddNewlyConstructedVariable(new ClangExpressionVariable(
exe_scope, name, compiler_type, byte_order, addr_byte_size));
}
void ClangPersistentVariables::RemovePersistentVariable(
lldb::ExpressionVariableSP variable) {
RemoveVariable(variable);
// Check if the removed variable was the last one that was created. If yes,
// reuse the variable id for the next variable.
// Nothing to do if we have not assigned a variable id so far.
if (m_next_persistent_variable_id == 0)
return;
llvm::StringRef name = variable->GetName().GetStringRef();
// Remove the prefix from the variable that only the indes is left.
if (!name.consume_front(GetPersistentVariablePrefix(false)))
return;
// Check if the variable contained a variable id.
uint32_t variable_id;
if (name.getAsInteger(10, variable_id))
return;
// If it's the most recent variable id that was assigned, make sure that this
// variable id will be used for the next persistent variable.
if (variable_id == m_next_persistent_variable_id - 1)
m_next_persistent_variable_id--;
}
llvm::Optional<CompilerType>
ClangPersistentVariables::GetCompilerTypeFromPersistentDecl(
ConstString type_name) {
CompilerType compiler_type;
if (clang::TypeDecl *tdecl = llvm::dyn_cast_or_null<clang::TypeDecl>(
GetPersistentDecl(type_name))) {
compiler_type.SetCompilerType(
ClangASTContext::GetASTContext(&tdecl->getASTContext()),
reinterpret_cast<lldb::opaque_compiler_type_t>(
const_cast<clang::Type *>(tdecl->getTypeForDecl())));
return compiler_type;
}
return llvm::None;
}
void ClangPersistentVariables::RegisterPersistentDecl(ConstString name,
clang::NamedDecl *decl) {
m_persistent_decls.insert(
std::pair<const char *, clang::NamedDecl *>(name.GetCString(), decl));
if (clang::EnumDecl *enum_decl = llvm::dyn_cast<clang::EnumDecl>(decl)) {
for (clang::EnumConstantDecl *enumerator_decl : enum_decl->enumerators()) {
m_persistent_decls.insert(std::pair<const char *, clang::NamedDecl *>(
ConstString(enumerator_decl->getNameAsString()).GetCString(),
enumerator_decl));
}
}
}
clang::NamedDecl *
ClangPersistentVariables::GetPersistentDecl(ConstString name) {
PersistentDeclMap::const_iterator i =
m_persistent_decls.find(name.GetCString());
if (i == m_persistent_decls.end())
return nullptr;
else
return i->second;
}
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