source/Plugins/Process/Utility/RegisterContextMemory.h

//===-- RegisterContextMemory.h ---------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#ifndef lldb_RegisterContextMemory_h_
#define lldb_RegisterContextMemory_h_

// C Includes
// C++ Includes
#include <vector>

// Other libraries and framework includes
// Project includes
#include "lldb/lldb-private.h"
#include "lldb/Core/DataExtractor.h"
#include "lldb/Target/RegisterContext.h"

class DynamicRegisterInfo;

class RegisterContextMemory : public lldb_private::RegisterContext
{
public:
    RegisterContextMemory (lldb_private::Thread &thread,
                            uint32_t concrete_frame_idx,
                            DynamicRegisterInfo &reg_info,
                            lldb::addr_t reg_data_addr);

    ~RegisterContextMemory() override;

    void
    InvalidateAllRegisters() override;

    size_t
    GetRegisterCount() override;

    const lldb_private::RegisterInfo *
    GetRegisterInfoAtIndex(size_t reg) override;

    size_t
    GetRegisterSetCount() override;

    const lldb_private::RegisterSet *
    GetRegisterSet(size_t reg_set) override;

    uint32_t
    ConvertRegisterKindToRegisterNumber(lldb::RegisterKind kind, uint32_t num) override;

    //------------------------------------------------------------------
    // If all of the thread register are in a contiguous buffer in 
    // memory, then the default ReadRegister/WriteRegister and
    // ReadAllRegisterValues/WriteAllRegisterValues will work. If thread
    // registers are not contiguous, clients will want to subclass this
    // class and modify the read/write functions as needed.
    //------------------------------------------------------------------

    bool
    ReadRegister(const lldb_private::RegisterInfo *reg_info,
                 lldb_private::RegisterValue &reg_value) override;
    
    bool
    WriteRegister(const lldb_private::RegisterInfo *reg_info,
                  const lldb_private::RegisterValue &reg_value) override;
    
    bool
    ReadAllRegisterValues(lldb::DataBufferSP &data_sp) override;
    
    bool
    WriteAllRegisterValues(const lldb::DataBufferSP &data_sp) override;

    void
    SetAllRegisterData  (const lldb::DataBufferSP &data_sp);

protected:
    void
    SetAllRegisterValid (bool b);

    DynamicRegisterInfo &m_reg_infos;
    std::vector<bool> m_reg_valid;
    lldb_private::DataExtractor m_reg_data;
    lldb::addr_t m_reg_data_addr; // If this is valid, then we have a register context that is stored in memmory

private:
    DISALLOW_COPY_AND_ASSIGN (RegisterContextMemory);
};

#endif // lldb_RegisterContextMemory_h_