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//===-- Materializer.h ------------------------------------------*- 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
//
//===----------------------------------------------------------------------===//
#ifndef LLDB_EXPRESSION_MATERIALIZER_H
#define LLDB_EXPRESSION_MATERIALIZER_H
#include <memory>
#include <vector>
#include "lldb/Expression/IRMemoryMap.h"
#include "lldb/Symbol/TaggedASTType.h"
#include "lldb/Target/StackFrame.h"
#include "lldb/Utility/Status.h"
#include "lldb/lldb-private-types.h"
namespace lldb_private {
class Materializer {
public:
Materializer() = default;
~Materializer();
class Dematerializer {
public:
Dematerializer() = default;
~Dematerializer() { Wipe(); }
void Dematerialize(Status &err, lldb::addr_t frame_top,
lldb::addr_t frame_bottom);
void Wipe();
bool IsValid() {
return m_materializer && m_map &&
(m_process_address != LLDB_INVALID_ADDRESS);
}
private:
friend class Materializer;
Dematerializer(Materializer &materializer, lldb::StackFrameSP &frame_sp,
IRMemoryMap &map, lldb::addr_t process_address)
: m_materializer(&materializer), m_map(&map),
m_process_address(process_address) {
if (frame_sp) {
m_thread_wp = frame_sp->GetThread();
m_stack_id = frame_sp->GetStackID();
}
}
Materializer *m_materializer = nullptr;
lldb::ThreadWP m_thread_wp;
StackID m_stack_id;
IRMemoryMap *m_map = nullptr;
lldb::addr_t m_process_address = LLDB_INVALID_ADDRESS;
};
typedef std::shared_ptr<Dematerializer> DematerializerSP;
typedef std::weak_ptr<Dematerializer> DematerializerWP;
DematerializerSP Materialize(lldb::StackFrameSP &frame_sp, IRMemoryMap &map,
lldb::addr_t process_address, Status &err);
class PersistentVariableDelegate {
public:
virtual ~PersistentVariableDelegate();
virtual ConstString GetName() = 0;
virtual void DidDematerialize(lldb::ExpressionVariableSP &variable) = 0;
};
uint32_t
AddPersistentVariable(lldb::ExpressionVariableSP &persistent_variable_sp,
PersistentVariableDelegate *delegate, Status &err);
uint32_t AddVariable(lldb::VariableSP &variable_sp, Status &err);
uint32_t AddResultVariable(const CompilerType &type, bool is_lvalue,
bool keep_in_memory,
PersistentVariableDelegate *delegate, Status &err);
uint32_t AddSymbol(const Symbol &symbol_sp, Status &err);
uint32_t AddRegister(const RegisterInfo ®ister_info, Status &err);
uint32_t GetStructAlignment() { return m_struct_alignment; }
uint32_t GetStructByteSize() { return m_current_offset; }
class Entity {
public:
Entity() : m_alignment(1), m_size(0), m_offset(0) {}
virtual ~Entity() = default;
virtual void Materialize(lldb::StackFrameSP &frame_sp, IRMemoryMap &map,
lldb::addr_t process_address, Status &err) = 0;
virtual void Dematerialize(lldb::StackFrameSP &frame_sp, IRMemoryMap &map,
lldb::addr_t process_address,
lldb::addr_t frame_top,
lldb::addr_t frame_bottom, Status &err) = 0;
virtual void DumpToLog(IRMemoryMap &map, lldb::addr_t process_address,
Log *log) = 0;
virtual void Wipe(IRMemoryMap &map, lldb::addr_t process_address) = 0;
uint32_t GetAlignment() { return m_alignment; }
uint32_t GetSize() { return m_size; }
uint32_t GetOffset() { return m_offset; }
void SetOffset(uint32_t offset) { m_offset = offset; }
protected:
uint32_t m_alignment;
uint32_t m_size;
uint32_t m_offset;
};
private:
uint32_t AddStructMember(Entity &entity);
typedef std::unique_ptr<Entity> EntityUP;
typedef std::vector<EntityUP> EntityVector;
DematerializerWP m_dematerializer_wp;
EntityVector m_entities;
uint32_t m_current_offset = 0;
uint32_t m_struct_alignment = 8;
};
} // namespace lldb_private
#endif // LLDB_EXPRESSION_MATERIALIZER_H
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