hanchenye-llvm-project/lldb/tools/lldb-mi/MICmdCmdThread.cpp

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

//++
// File:        MICmdCmdThread.cpp
//
// Overview:    CMICmdCmdThreadInfo     implementation.
//
// Environment: Compilers:  Visual C++ 12.
//                          gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1
//              Libraries:  See MIReadmetxt.
//
// Copyright:   None.
//--

// Third Party Headers:
#include "lldb/API/SBBreakpointLocation.h"
#include "lldb/API/SBThread.h"

// In-house headers:
#include "MICmdCmdThread.h"
#include "MICmnMIResultRecord.h"
#include "MICmnMIValueConst.h"
#include "MICmnLLDBDebugger.h"
#include "MICmnLLDBDebugSessionInfo.h"
#include "MICmdArgValNumber.h"

//++ ------------------------------------------------------------------------------------
// Details: CMICmdCmdThreadInfo constructor.
// Type:    Method.
// Args:    None.
// Return:  None.
// Throws:  None.
//--
CMICmdCmdThreadInfo::CMICmdCmdThreadInfo(void)
    : m_bSingleThread(false)
    , m_bThreadInvalid(true)
    , m_constStrArgNamedThreadId("thread-id")
{
    // Command factory matches this name with that received from the stdin stream
    m_strMiCmd = "thread-info";

    // Required by the CMICmdFactory when registering *this command
    m_pSelfCreatorFn = &CMICmdCmdThreadInfo::CreateSelf;
}

//++ ------------------------------------------------------------------------------------
// Details: CMICmdCmdThreadInfo destructor.
// Type:    Overrideable.
// Args:    None.
// Return:  None.
// Throws:  None.
//--
CMICmdCmdThreadInfo::~CMICmdCmdThreadInfo(void)
{
    m_vecMIValueTuple.clear();
}

//++ ------------------------------------------------------------------------------------
// Details: The invoker requires this function. The parses the command line options
//          arguments to extract values for each of those arguments.
// Type:    Overridden.
// Args:    None.
// Return:  MIstatus::success - Functional succeeded.
//          MIstatus::failure - Functional failed.
// Throws:  None.
//--
bool
CMICmdCmdThreadInfo::ParseArgs(void)
{
    bool bOk = m_setCmdArgs.Add(*(new CMICmdArgValNumber(m_constStrArgNamedThreadId, false, true)));
    return (bOk && ParseValidateCmdOptions());
}

//++ ------------------------------------------------------------------------------------
// Details: The invoker requires this function. The command does work in this function.
//          The command is likely to communicate with the LLDB SBDebugger in here.
// Type:    Overridden.
// Args:    None.
// Return:  MIstatus::success - Functional succeeded.
//          MIstatus::failure - Functional failed.
// Throws:  None.
//--
bool
CMICmdCmdThreadInfo::Execute(void)
{
    CMICMDBASE_GETOPTION(pArgThreadId, Number, m_constStrArgNamedThreadId);
    MIuint nThreadId = 0;
    if (pArgThreadId->GetFound() && pArgThreadId->GetValid())
    {
        m_bSingleThread = true;
        nThreadId = static_cast<MIuint>(pArgThreadId->GetValue());
    }

    CMICmnLLDBDebugSessionInfo &rSessionInfo(CMICmnLLDBDebugSessionInfo::Instance());
    lldb::SBProcess &rProcess = rSessionInfo.m_lldbProcess;
    lldb::SBThread thread = rProcess.GetSelectedThread();

    if (m_bSingleThread)
    {
        thread = rProcess.GetThreadByIndexID(nThreadId);
        m_bThreadInvalid = thread.IsValid();
        if (!m_bThreadInvalid)
            return MIstatus::success;

        CMICmnMIValueTuple miTuple;
        if (!rSessionInfo.MIResponseFormThreadInfo3(m_cmdData, thread, miTuple))
            return MIstatus::failure;

        m_miValueTupleThread = miTuple;

        return MIstatus::success;
    }

    // Multiple threads
    m_vecMIValueTuple.clear();
    const MIuint nThreads = rProcess.GetNumThreads();
    for (MIuint i = 0; i < nThreads; i++)
    {
        lldb::SBThread thread = rProcess.GetThreadAtIndex(i);
        if (thread.IsValid())
        {
            CMICmnMIValueTuple miTuple;
            if (!rSessionInfo.MIResponseFormThreadInfo3(m_cmdData, thread, miTuple))
                return MIstatus::failure;

            m_vecMIValueTuple.push_back(miTuple);
        }
    }

    return MIstatus::success;
}

//++ ------------------------------------------------------------------------------------
// Details: The invoker requires this function. The command prepares a MI Record Result
//          for the work carried out in the Execute().
// Type:    Overridden.
// Args:    None.
// Return:  MIstatus::success - Functional succeeded.
//          MIstatus::failure - Functional failed.
// Throws:  None.
//--
bool
CMICmdCmdThreadInfo::Acknowledge(void)
{
    if (m_bSingleThread)
    {
        if (!m_bThreadInvalid)
        {
            const CMICmnMIValueConst miValueConst("invalid thread id");
            const CMICmnMIValueResult miValueResult("msg", miValueConst);
            const CMICmnMIResultRecord miRecordResult(m_cmdData.strMiCmdToken, CMICmnMIResultRecord::eResultClass_Error, miValueResult);
            m_miResultRecord = miRecordResult;
            return MIstatus::success;
        }

        // MI print "%s^done,threads=[{id=\"%d\",target-id=\"%s\",frame={},state=\"%s\"}]
        const CMICmnMIValueList miValueList(m_miValueTupleThread);
        const CMICmnMIValueResult miValueResult("threads", miValueList);
        const CMICmnMIResultRecord miRecordResult(m_cmdData.strMiCmdToken, CMICmnMIResultRecord::eResultClass_Done, miValueResult);
        m_miResultRecord = miRecordResult;
        return MIstatus::success;
    }

    // Build up a list of thread information from tuples
    VecMIValueTuple_t::const_iterator it = m_vecMIValueTuple.begin();
    if (it == m_vecMIValueTuple.end())
    {
        const CMICmnMIValueConst miValueConst("[]");
        const CMICmnMIValueResult miValueResult("threads", miValueConst);
        const CMICmnMIResultRecord miRecordResult(m_cmdData.strMiCmdToken, CMICmnMIResultRecord::eResultClass_Done, miValueResult);
        m_miResultRecord = miRecordResult;
        return MIstatus::success;
    }
    CMICmnMIValueList miValueList(*it);
    ++it;
    while (it != m_vecMIValueTuple.end())
    {
        const CMICmnMIValueTuple &rTuple(*it);
        miValueList.Add(rTuple);

        // Next
        ++it;
    }

    const CMICmnMIValueResult miValueResult("threads", miValueList);
    const CMICmnMIResultRecord miRecordResult(m_cmdData.strMiCmdToken, CMICmnMIResultRecord::eResultClass_Done, miValueResult);
    m_miResultRecord = miRecordResult;

    return MIstatus::success;
}

//++ ------------------------------------------------------------------------------------
// Details: Required by the CMICmdFactory when registering *this command. The factory
//          calls this function to create an instance of *this command.
// Type:    Static method.
// Args:    None.
// Return:  CMICmdBase * - Pointer to a new command.
// Throws:  None.
//--
CMICmdBase *
CMICmdCmdThreadInfo::CreateSelf(void)
{
    return new CMICmdCmdThreadInfo();
}