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//===-- ClangPersistentVariables.cpp --------------------------------------===//
//
// 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 "ClangASTImporter.h"
#include "ClangModulesDeclVendor.h"
#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
#include "lldb/Core/Value.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"
#include <optional>
#include <memory>
using namespace lldb;
using namespace lldb_private;
char ClangPersistentVariables::ID;
ClangPersistentVariables::ClangPersistentVariables(
std::shared_ptr<Target> target_sp)
: m_target_sp(target_sp) {}
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--;
}
std::optional<CompilerType>
ClangPersistentVariables::GetCompilerTypeFromPersistentDecl(
ConstString type_name) {
PersistentDecl p = m_persistent_decls.lookup(type_name.GetCString());
if (p.m_decl == nullptr)
return std::nullopt;
if (clang::TypeDecl *tdecl = llvm::dyn_cast<clang::TypeDecl>(p.m_decl)) {
opaque_compiler_type_t t = static_cast<opaque_compiler_type_t>(
const_cast<clang::Type *>(tdecl->getTypeForDecl()));
return CompilerType(p.m_context, t);
}
return std::nullopt;
}
void ClangPersistentVariables::RegisterPersistentDecl(
ConstString name, clang::NamedDecl *decl,
std::shared_ptr<TypeSystemClang> ctx) {
PersistentDecl p = {decl, ctx};
m_persistent_decls.insert(std::make_pair(name.GetCString(), p));
if (clang::EnumDecl *enum_decl = llvm::dyn_cast<clang::EnumDecl>(decl)) {
for (clang::EnumConstantDecl *enumerator_decl : enum_decl->enumerators()) {
p = {enumerator_decl, ctx};
m_persistent_decls.insert(std::make_pair(
ConstString(enumerator_decl->getNameAsString()).GetCString(), p));
}
}
}
clang::NamedDecl *
ClangPersistentVariables::GetPersistentDecl(ConstString name) {
return m_persistent_decls.lookup(name.GetCString()).m_decl;
}
std::shared_ptr<ClangASTImporter>
ClangPersistentVariables::GetClangASTImporter() {
if (!m_ast_importer_sp) {
m_ast_importer_sp = std::make_shared<ClangASTImporter>();
}
return m_ast_importer_sp;
}
std::shared_ptr<ClangModulesDeclVendor>
ClangPersistentVariables::GetClangModulesDeclVendor() {
if (!m_modules_decl_vendor_sp) {
m_modules_decl_vendor_sp.reset(
ClangModulesDeclVendor::Create(*m_target_sp));
}
return m_modules_decl_vendor_sp;
}
ConstString
ClangPersistentVariables::GetNextPersistentVariableName(bool is_error) {
llvm::SmallString<64> name;
{
llvm::raw_svector_ostream os(name);
os << GetPersistentVariablePrefix(is_error)
<< m_next_persistent_variable_id++;
}
return ConstString(name);
}
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