xref: /llvm-project-15.0.7/lldb/source/Host/common/NativeThreadProtocol.cpp (revision af245d11)

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

#include "NativeThreadProtocol.h"

#include "NativeProcessProtocol.h"
#include "lldb/Target/NativeRegisterContext.h"
#include "SoftwareBreakpoint.h"

using namespace lldb;
using namespace lldb_private;

NativeThreadProtocol::NativeThreadProtocol (NativeProcessProtocol *process, lldb::tid_t tid) :
    m_process_wp (process->shared_from_this ()),
    m_tid (tid)
{
}

Error
NativeThreadProtocol::ReadRegister (uint32_t reg, RegisterValue &reg_value)
{
    NativeRegisterContextSP register_context_sp = GetRegisterContext ();
    if (!register_context_sp)
        return Error ("no register context");

    const RegisterInfo *const reg_info = register_context_sp->GetRegisterInfoAtIndex (reg);
    if (!reg_info)
        return Error ("no register info for reg num %" PRIu32, reg);

    return register_context_sp->ReadRegister (reg_info, reg_value);;
}

Error
NativeThreadProtocol::WriteRegister (uint32_t reg, const RegisterValue &reg_value)
{
    NativeRegisterContextSP register_context_sp = GetRegisterContext ();
    if (!register_context_sp)
        return Error ("no register context");

    const RegisterInfo *const reg_info = register_context_sp->GetRegisterInfoAtIndex (reg);
    if (!reg_info)
        return Error ("no register info for reg num %" PRIu32, reg);

    return register_context_sp->WriteRegister (reg_info, reg_value);
}

Error
NativeThreadProtocol::SaveAllRegisters (lldb::DataBufferSP &data_sp)
{
    NativeRegisterContextSP register_context_sp = GetRegisterContext ();
    if (!register_context_sp)
        return Error ("no register context");
    return register_context_sp->WriteAllRegisterValues (data_sp);
}

Error
NativeThreadProtocol::RestoreAllRegisters (lldb::DataBufferSP &data_sp)
{
    NativeRegisterContextSP register_context_sp = GetRegisterContext ();
    if (!register_context_sp)
        return Error ("no register context");
    return register_context_sp->ReadAllRegisterValues (data_sp);
}

NativeProcessProtocolSP
NativeThreadProtocol::GetProcess ()
{
    return m_process_wp.lock ();
}

uint32_t
NativeThreadProtocol::TranslateStopInfoToGdbSignal (const ThreadStopInfo &stop_info) const
{
    // Default: no translation.  Do the real translation where there
    // is access to the host signal numbers.
    switch (stop_info.reason)
    {
        case eStopReasonSignal:
            return stop_info.details.signal.signo;
            break;

        case eStopReasonException:
            // FIXME verify the way to specify pass-thru here.
            return static_cast<uint32_t> (stop_info.details.exception.type);
            break;

        default:
            assert (0 && "unexpected stop_info.reason found");
            return 0;
    }
}