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//===-- RegisterCheckpoint.h ------------------------------------*- C++ -*-===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#include "lldb/Target/StackID.h"
#include "lldb/Utility/UserID.h"
#include "lldb/lldb-private.h"
namespace lldb_private {
// Inherit from UserID in case pushing/popping all register values can be done
// using a 64 bit integer that holds a baton/cookie instead of actually having
// to read all register values into a buffer
class RegisterCheckpoint : public UserID {
enum class Reason {
// An expression is about to be run on the thread if the protocol that
// talks to the debuggee supports checkpointing the registers using a
// push/pop then the UserID base class in the RegisterCheckpoint can be
// used to store the baton/cookie that refers to the remote saved state.
// The register checkpoint wants the raw register bytes, so they must be
// read into m_data_sp, or the save/restore checkpoint should fail.
RegisterCheckpoint(Reason reason)
: UserID(0), m_data_sp(), m_reason(reason) {}
~RegisterCheckpoint() = default;
lldb::DataBufferSP &GetData() { return m_data_sp; }
const lldb::DataBufferSP &GetData() const { return m_data_sp; }
lldb::DataBufferSP m_data_sp;
Reason m_reason;
// Make RegisterCheckpointSP if you wish to share the data in this class.
RegisterCheckpoint(const RegisterCheckpoint &) = delete;
const RegisterCheckpoint &operator=(const RegisterCheckpoint &) = delete;
} // namespace lldb_private