gdbengine.cpp 142 KB
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/**************************************************************************
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**
** This file is part of Qt Creator
**
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** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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**
** Contact:  Qt Software Information (qt-info@nokia.com)
**
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** Commercial Usage
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**
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** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
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**
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**************************************************************************/
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#define QT_NO_CAST_FROM_ASCII

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#include "gdbengine.h"
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#include "gdboptionspage.h"
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#include "watchutils.h"
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#include "debuggeractions.h"
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#include "debuggerconstants.h"
#include "debuggermanager.h"
#include "gdbmi.h"
#include "procinterrupt.h"

#include "disassemblerhandler.h"
#include "breakhandler.h"
#include "moduleshandler.h"
#include "registerhandler.h"
#include "stackhandler.h"
#include "watchhandler.h"
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#include "sourcefileswindow.h"
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#include "debuggerdialogs.h"
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#include <utils/qtcassert.h>
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#include <coreplugin/icore.h>
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#include <QtCore/QDebug>
#include <QtCore/QDir>
#include <QtCore/QFileInfo>
#include <QtCore/QTime>
#include <QtCore/QTimer>
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#include <QtCore/QTextStream>
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#include <QtGui/QAction>
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#include <QtGui/QApplication>
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#include <QtGui/QLabel>
#include <QtGui/QMainWindow>
#include <QtGui/QMessageBox>
#include <QtGui/QToolTip>
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#include <QtGui/QDialogButtonBox>
#include <QtGui/QPushButton>
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#if defined(Q_OS_LINUX) || defined(Q_OS_MAC)
#include <unistd.h>
#include <dlfcn.h>
#endif
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#include <ctype.h>
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using namespace Debugger;
using namespace Debugger::Internal;
using namespace Debugger::Constants;

Q_DECLARE_METATYPE(Debugger::Internal::GdbMi);

//#define DEBUG_PENDING  1
//#define DEBUG_SUBITEM  1

#if DEBUG_PENDING
#   define PENDING_DEBUG(s) qDebug() << s
#else
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#   define PENDING_DEBUG(s)
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#endif

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#define STRINGIFY_INTERNAL(x) #x
#define STRINGIFY(x) STRINGIFY_INTERNAL(x)

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typedef QLatin1Char _c;
typedef QLatin1String __;
static inline QString _(const char *s) { return QString::fromLatin1(s); }
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static const QString tooltipIName = _("tooltip");
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///////////////////////////////////////////////////////////////////////
//
// GdbCommandType
//
///////////////////////////////////////////////////////////////////////

enum GdbCommandType
{
    GdbInvalidCommand = 0,

    GdbShowVersion = 100,
    GdbFileExecAndSymbols,
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    //GdbQueryPwd,
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    GdbQuerySources,
    GdbAsyncOutput2,
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    GdbStart,
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    GdbExit,
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    GdbAttached,
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    GdbStubAttached,
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    GdbExecRun,
    GdbExecRunToFunction,
    GdbExecStep,
    GdbExecNext,
    GdbExecStepI,
    GdbExecNextI,
    GdbExecContinue,
    GdbExecFinish,
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    //GdbExecJumpToLine,
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    GdbExecInterrupt,
    GdbInfoShared,
    GdbInfoProc,
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    GdbInfoThreads,
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    GdbQueryDebuggingHelper,
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    GdbTemporaryContinue,
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    GdbTargetCore,
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    BreakCondition = 200,
    BreakEnablePending,
    BreakSetAnnotate,
    BreakDelete,
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    BreakEnable,
    BreakDisable,
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    BreakList,
    BreakIgnore,
    BreakInfo,
    BreakInsert,
    BreakInsert1,

    DisassemblerList = 300,

    ModulesList = 400,

    RegisterListNames = 500,
    RegisterListValues,

    StackSelectThread = 600,
    StackListThreads,
    StackListFrames,
    StackListLocals,
    StackListArguments,

    WatchVarAssign = 700,             // data changed by user
    WatchVarListChildren,
    WatchVarCreate,
    WatchEvaluateExpression,
    WatchToolTip,
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    WatchDebuggingHelperSetup,
    WatchDebuggingHelperValue1,           // waiting for gdb ack
    WatchDebuggingHelperValue2,           // waiting for actual data
    WatchDebuggingHelperValue3,           // macro based
    WatchDebuggingHelperEditValue,
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};

static int &currentToken()
{
    static int token = 0;
    return token;
}

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static bool isSkippable(int type)
{
    return type == RegisterListValues
        && type == StackListThreads
        && type == StackListFrames
        && type == StackListLocals
        && type == StackListArguments
        && type == WatchVarAssign
        && type == WatchVarListChildren
        && type == WatchVarCreate
        && type == WatchEvaluateExpression
        && type == WatchToolTip;
}

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///////////////////////////////////////////////////////////////////////
//
// GdbEngine
//
///////////////////////////////////////////////////////////////////////

GdbEngine::GdbEngine(DebuggerManager *parent)
{
    q = parent;
    qq = parent->engineInterface();
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    m_stubProc.setDebug(true);
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    initializeVariables();
    initializeConnections();
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}

GdbEngine::~GdbEngine()
{
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    // prevent sending error messages afterwards
    m_gdbProc.disconnect(this);
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}

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void GdbEngine::initializeConnections()
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{
    // Gdb Process interaction
    connect(&m_gdbProc, SIGNAL(error(QProcess::ProcessError)), this,
        SLOT(gdbProcError(QProcess::ProcessError)));
    connect(&m_gdbProc, SIGNAL(readyReadStandardOutput()), this,
        SLOT(readGdbStandardOutput()));
    connect(&m_gdbProc, SIGNAL(readyReadStandardError()), this,
        SLOT(readGdbStandardError()));
    connect(&m_gdbProc, SIGNAL(finished(int, QProcess::ExitStatus)), q,
        SLOT(exitDebugger()));

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    connect(&m_stubProc, SIGNAL(processError(QString)), SLOT(stubError(QString)));
    connect(&m_stubProc, SIGNAL(processStarted()), SLOT(stubStarted()));
    connect(&m_stubProc, SIGNAL(wrapperStopped()), q, SLOT(exitDebugger()));

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    // Output
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    connect(&m_outputCollector, SIGNAL(byteDelivery(QByteArray)),
            SLOT(readDebugeeOutput(QByteArray)));
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    connect(this, SIGNAL(gdbOutputAvailable(QString,QString)),
        q, SLOT(showDebuggerOutput(QString,QString)),
        Qt::QueuedConnection);
    connect(this, SIGNAL(gdbInputAvailable(QString,QString)),
        q, SLOT(showDebuggerInput(QString,QString)),
        Qt::QueuedConnection);
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    connect(this, SIGNAL(applicationOutputAvailable(QString)),
        q, SLOT(showApplicationOutput(QString)),
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        Qt::QueuedConnection);
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    connect(theDebuggerAction(UseDebuggingHelpers), SIGNAL(valueChanged(QVariant)),
        this, SLOT(setUseDebuggingHelpers(QVariant)));
    connect(theDebuggerAction(DebugDebuggingHelpers), SIGNAL(valueChanged(QVariant)),
        this, SLOT(setDebugDebuggingHelpers(QVariant)));
    connect(theDebuggerAction(RecheckDebuggingHelpers), SIGNAL(triggered()),
        this, SLOT(recheckDebuggingHelperAvailability()));
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    connect(theDebuggerAction(ExpandStack), SIGNAL(triggered()),
        this, SLOT(reloadFullStack()));
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    connect(theDebuggerAction(MaximalStackDepth), SIGNAL(triggered()),
        this, SLOT(reloadFullStack()));
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}

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void GdbEngine::initializeVariables()
{
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    m_debuggingHelperState = DebuggingHelperUninitialized;
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    m_gdbVersion = 100;
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    m_gdbBuildVersion = -1;
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    m_fullToShortName.clear();
    m_shortToFullName.clear();
    m_varToType.clear();

    m_modulesListOutdated = true;
    m_oldestAcceptableToken = -1;
    m_outputCodec = QTextCodec::codecForLocale();
    m_pendingRequests = 0;
    m_waitingForBreakpointSynchronizationToContinue = false;
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    m_waitingForFirstBreakpointToBeHit = false;
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    m_commandsToRunOnTemporaryBreak.clear();
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}

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void GdbEngine::gdbProcError(QProcess::ProcessError error)
{
    QString msg;
    switch (error) {
        case QProcess::FailedToStart:
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            msg = tr("The Gdb process failed to start. Either the "
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                "invoked program '%1' is missing, or you may have insufficient "
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                "permissions to invoke the program.")
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                .arg(theDebuggerStringSetting(GdbLocation));
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            break;
        case QProcess::Crashed:
            msg = tr("The Gdb process crashed some time after starting "
                "successfully.");
            break;
        case QProcess::Timedout:
            msg = tr("The last waitFor...() function timed out. "
                "The state of QProcess is unchanged, and you can try calling "
                "waitFor...() again.");
            break;
        case QProcess::WriteError:
            msg = tr("An error occurred when attempting to write "
                "to the Gdb process. For example, the process may not be running, "
                "or it may have closed its input channel.");
            break;
        case QProcess::ReadError:
            msg = tr("An error occurred when attempting to read from "
                "the Gdb process. For example, the process may not be running.");
            break;
        default:
            msg = tr("An unknown error in the Gdb process occurred. "
                "This is the default return value of error().");
    }

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    q->showStatusMessage(msg);
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    QMessageBox::critical(q->mainWindow(), tr("Error"), msg);
    // act as if it was closed by the core
    q->exitDebugger();
}

#if 0
static void dump(const char *first, const char *middle, const QString & to)
{
    QByteArray ba(first, middle - first);
    Q_UNUSED(to);
    // note that qDebug cuts off output after a certain size... (bug?)
    qDebug("\n>>>>> %s\n%s\n====\n%s\n<<<<<\n",
        qPrintable(currentTime()),
        qPrintable(QString(ba).trimmed()),
        qPrintable(to.trimmed()));
    //qDebug() << "";
    //qDebug() << qPrintable(currentTime())
    //    << " Reading response:  " << QString(ba).trimmed() << "\n";
}
#endif

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void GdbEngine::readDebugeeOutput(const QByteArray &data)
{
    emit applicationOutputAvailable(m_outputCodec->toUnicode(
            data.constData(), data.length(), &m_outputCodecState));
}

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void GdbEngine::debugMessage(const QString &msg)
{
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    emit gdbOutputAvailable(_("debug:"), msg);
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}

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void GdbEngine::handleResponse(const QByteArray &buff)
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{
    static QTime lastTime;

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    emit gdbOutputAvailable(_("            "), currentTime());
    emit gdbOutputAvailable(_("stdout:"), QString::fromLocal8Bit(buff));
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#if 0
    qDebug() // << "#### start response handling #### "
        << currentTime()
        << lastTime.msecsTo(QTime::currentTime()) << "ms,"
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        << "buf: " << buff.left(1500) << "..."
        //<< "buf: " << buff
        << "size:" << buff.size();
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#else
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    //qDebug() << "buf: " << buff;
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#endif

    lastTime = QTime::currentTime();

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    if (buff.isEmpty() || buff == "(gdb) ")
        return;
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    const char *from = buff.constData();
    const char *to = from + buff.size();
    const char *inner;
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    int token = -1;
    // token is a sequence of numbers
    for (inner = from; inner != to; ++inner)
        if (*inner < '0' || *inner > '9')
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            break;
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    if (from != inner) {
        token = QByteArray(from, inner - from).toInt();
        from = inner;
        //qDebug() << "found token " << token;
    }
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    // next char decides kind of record
    const char c = *from++;
    //qDebug() << "CODE:" << c;
    switch (c) {
        case '*':
        case '+':
        case '=': {
            QByteArray asyncClass;
            for (; from != to; ++from) {
                const char c = *from;
                if (!isNameChar(c))
                    break;
                asyncClass += *from;
            }
            //qDebug() << "ASYNCCLASS" << asyncClass;
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            GdbMi record;
            while (from != to) {
                GdbMi data;
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                if (*from != ',') {
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                    // happens on archer where we get 
                    // 23^running <NL> *running,thread-id="all" <NL> (gdb) 
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                    record.m_type = GdbMi::Tuple;
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                    break;
                }
                ++from; // skip ','
                data.parseResultOrValue(from, to);
                if (data.isValid()) {
                    //qDebug() << "parsed response: " << data.toString();
                    record.m_children += data;
                    record.m_type = GdbMi::Tuple;
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                }
            }
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            if (asyncClass == "stopped") {
                handleAsyncOutput(record);
            } else if (asyncClass == "running") {
                // Archer has 'thread-id="all"' here
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            } else if (asyncClass == "library-loaded") {
                // Archer has 'id="/usr/lib/libdrm.so.2",
                // target-name="/usr/lib/libdrm.so.2",
                // host-name="/usr/lib/libdrm.so.2",
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                // symbols-loaded="0"
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                QByteArray id = record.findChild("id").data();
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                if (!id.isEmpty())
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                    q->showStatusMessage(tr("Library %1 loaded.").arg(_(id)));
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            } else if (asyncClass == "library-unloaded") {
                // Archer has 'id="/usr/lib/libdrm.so.2",
                // target-name="/usr/lib/libdrm.so.2",
                // host-name="/usr/lib/libdrm.so.2"
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                QByteArray id = record.findChild("id").data();
                q->showStatusMessage(tr("Library %1 unloaded.").arg(_(id)));
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            } else if (asyncClass == "thread-group-created") {
                // Archer has "{id="28902"}" 
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                QByteArray id = record.findChild("id").data();
                q->showStatusMessage(tr("Thread group %1 created.").arg(_(id)));
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            } else if (asyncClass == "thread-created") {
                //"{id="1",group-id="28902"}" 
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                QByteArray id = record.findChild("id").data();
                q->showStatusMessage(tr("Thread %1 created.").arg(_(id)));
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            } else if (asyncClass == "thread-group-exited") {
                // Archer has "{id="28902"}" 
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                QByteArray id = record.findChild("id").data();
                q->showStatusMessage(tr("Thread group %1 exited.").arg(_(id)));
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            } else if (asyncClass == "thread-exited") {
                //"{id="1",group-id="28902"}" 
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                QByteArray id = record.findChild("id").data();
                QByteArray groupid = record.findChild("group-id").data();
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                q->showStatusMessage(tr("Thread %1 in group %2 exited.")
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                    .arg(_(id)).arg(_(groupid)));
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            } else if (asyncClass == "thread-selected") {
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                QByteArray id = record.findChild("id").data();
                q->showStatusMessage(tr("Thread %1 selected.").arg(_(id)));
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                //"{id="2"}" 
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            #ifdef Q_OS_MAC
            } else if (asyncClass == "shlibs-updated") {
                // MAC announces updated libs
            } else if (asyncClass == "shlibs-added") {
                // MAC announces added libs
                // {shlib-info={num="2", name="libmathCommon.A_debug.dylib",
                // kind="-", dyld-addr="0x7f000", reason="dyld", requested-state="Y",
                // state="Y", path="/usr/lib/system/libmathCommon.A_debug.dylib",
                // description="/usr/lib/system/libmathCommon.A_debug.dylib",
                // loaded_addr="0x7f000", slide="0x7f000", prefix=""}}
            #endif
            } else {
                qDebug() << "IGNORED ASYNC OUTPUT "
                    << asyncClass << record.toString();
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            }
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            break;
        }
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        case '~': {
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            QByteArray data = GdbMi::parseCString(from, to);
            m_pendingConsoleStreamOutput += data;
            if (data.startsWith("Reading symbols from ")) {
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                q->showStatusMessage(tr("Reading %1...").arg(_(data.mid(21))));
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            }
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            break;
        }
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        case '@': {
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            QByteArray data = GdbMi::parseCString(from, to);
            m_pendingTargetStreamOutput += data;
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            break;
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        }

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        case '&': {
            QByteArray data = GdbMi::parseCString(from, to);
            m_pendingLogStreamOutput += data;
            // On Windows, the contents seem to depend on the debugger
            // version and/or OS version used.
            if (data.startsWith("warning:"))
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                qq->showApplicationOutput(_(data.mid(9))); // cut "warning: "
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            break;
        }

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        case '^': {
            GdbResultRecord record;
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            record.token = token;
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            for (inner = from; inner != to; ++inner)
                if (*inner < 'a' || *inner > 'z')
                    break;
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            QByteArray resultClass(from, inner - from);
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            if (resultClass == "done")
                record.resultClass = GdbResultDone;
            else if (resultClass == "running")
                record.resultClass = GdbResultRunning;
            else if (resultClass == "connected")
                record.resultClass = GdbResultConnected;
            else if (resultClass == "error")
                record.resultClass = GdbResultError;
            else if (resultClass == "exit")
                record.resultClass = GdbResultExit;
            else
                record.resultClass = GdbResultUnknown;
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            from = inner;
            if (from != to) {
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                if (*from == ',') {
                    ++from;
                    record.data.parseTuple_helper(from, to);
                    record.data.m_type = GdbMi::Tuple;
                    record.data.m_name = "data";
                } else {
                    // Archer has this
                    record.data.m_type = GdbMi::Tuple;
                    record.data.m_name = "data";
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                }
            }
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            //qDebug() << "\nLOG STREAM:" + m_pendingLogStreamOutput;
            //qDebug() << "\nTARGET STREAM:" + m_pendingTargetStreamOutput;
            //qDebug() << "\nCONSOLE STREAM:" + m_pendingConsoleStreamOutput;
            record.data.setStreamOutput("logstreamoutput",
                m_pendingLogStreamOutput);
            record.data.setStreamOutput("targetstreamoutput",
                m_pendingTargetStreamOutput);
            record.data.setStreamOutput("consolestreamoutput",
                m_pendingConsoleStreamOutput);
            QByteArray custom = m_customOutputForToken[token];
            if (!custom.isEmpty())
                record.data.setStreamOutput("customvaluecontents",
                    '{' + custom + '}');
            //m_customOutputForToken.remove(token);
            m_pendingLogStreamOutput.clear();
            m_pendingTargetStreamOutput.clear();
            m_pendingConsoleStreamOutput.clear();

            handleResultRecord(record);
            break;
        }
        default: {
            qDebug() << "UNKNOWN RESPONSE TYPE" << c;
            break;
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        }
    }
}

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void GdbEngine::handleStubAttached()
{
    qq->notifyInferiorStopped();
    m_waitingForBreakpointSynchronizationToContinue = true;
    handleAqcuiredInferior();
}

void GdbEngine::stubStarted()
{
    q->m_attachedPID = m_stubProc.applicationPID();
    qq->notifyInferiorPidChanged(q->m_attachedPID);
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    sendCommand(_("attach ") + QString::number(q->m_attachedPID), GdbStubAttached);
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}

void GdbEngine::stubError(const QString &msg)
{
    QMessageBox::critical(q->mainWindow(), tr("Debugger Error"), msg);
}

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void GdbEngine::readGdbStandardError()
{
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    qWarning() << "Unexpected gdb stderr:" << m_gdbProc.readAllStandardError();
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}

void GdbEngine::readGdbStandardOutput()
{
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    int newstart = 0;
    int scan = m_inbuffer.size();
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    m_inbuffer.append(m_gdbProc.readAllStandardOutput());
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    while (newstart < m_inbuffer.size()) {
        int start = newstart;
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        int end = m_inbuffer.indexOf('\n', scan);
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        if (end < 0) {
            m_inbuffer.remove(0, start);
            return;
        }
        newstart = end + 1;
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        scan = newstart;
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        if (end == start)
            continue;
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        #ifdef Q_OS_WIN
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        if (m_inbuffer.at(end - 1) == '\r') {
            --end;
            if (end == start)
                continue;
        }
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        #endif
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        handleResponse(QByteArray::fromRawData(m_inbuffer.constData() + start, end - start));
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    }
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    m_inbuffer.clear();
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}

void GdbEngine::interruptInferior()
{
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    qq->notifyInferiorStopRequested();
    if (m_gdbProc.state() == QProcess::NotRunning) {
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        debugMessage(_("TRYING TO INTERRUPT INFERIOR WITHOUT RUNNING GDB"));
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        qq->notifyInferiorExited();
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        return;
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    }
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    if (q->m_attachedPID <= 0) {
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        debugMessage(_("TRYING TO INTERRUPT INFERIOR BEFORE PID WAS OBTAINED"));
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        return;
    }

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    if (!interruptProcess(q->m_attachedPID))
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        debugMessage(_("CANNOT INTERRUPT %1").arg(q->m_attachedPID));
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}

void GdbEngine::maybeHandleInferiorPidChanged(const QString &pid0)
{
    int pid = pid0.toInt();
    if (pid == 0) {
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        debugMessage(_("Cannot parse PID from %1").arg(pid0));
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        return;
    }
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    if (pid == q->m_attachedPID)
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        return;
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    debugMessage(_("FOUND PID %1").arg(pid));
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    q->m_attachedPID = pid;
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    qq->notifyInferiorPidChanged(pid);
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}

void GdbEngine::sendSynchronizedCommand(const QString & command,
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    int type, const QVariant &cookie, StopNeeded needStop)
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{
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    sendCommand(command, type, cookie, needStop, Synchronized);
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}

void GdbEngine::sendCommand(const QString &command, int type,
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    const QVariant &cookie, StopNeeded needStop, Synchronization synchronized)
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{
    if (m_gdbProc.state() == QProcess::NotRunning) {
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        debugMessage(_("NO GDB PROCESS RUNNING, CMD IGNORED: ") + command);
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        return;
    }

    if (synchronized) {
        ++m_pendingRequests;
        PENDING_DEBUG("   TYPE " << type << " INCREMENTS PENDING TO: "
            << m_pendingRequests << command);
    } else {
        PENDING_DEBUG("   UNKNOWN TYPE " << type << " LEAVES PENDING AT: "
            << m_pendingRequests << command);
    }

    GdbCookie cmd;
    cmd.synchronized = synchronized;
    cmd.command = command;
    cmd.type = type;
    cmd.cookie = cookie;

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    if (needStop && q->status() != DebuggerInferiorStopped
            && q->status() != DebuggerProcessStartingUp) {
        // queue the commands that we cannot send at once
        QTC_ASSERT(q->status() == DebuggerInferiorRunning,
            qDebug() << "STATUS: " << q->status());
        q->showStatusMessage(tr("Stopping temporarily."));
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        debugMessage(_("QUEUING COMMAND ") + cmd.command);
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        m_commandsToRunOnTemporaryBreak.append(cmd);
        interruptInferior();
    } else if (!command.isEmpty()) {
        ++currentToken();
        m_cookieForToken[currentToken()] = cmd;
        cmd.command = QString::number(currentToken()) + cmd.command;
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        if (cmd.command.contains(__("%1")))
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            cmd.command = cmd.command.arg(currentToken());
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        m_gdbProc.write(cmd.command.toLatin1() + "\r\n");
        //emit gdbInputAvailable(QString(), "         " +  currentTime());
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        //emit gdbInputAvailable(QString(), "[" + currentTime() + "]    " + cmd.command);
        emit gdbInputAvailable(QString(), cmd.command);
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    }
}

void GdbEngine::handleResultRecord(const GdbResultRecord &record)
{
    //qDebug() << "TOKEN: " << record.token
    //    << " ACCEPTABLE: " << m_oldestAcceptableToken;
    //qDebug() << "";
    //qDebug() << "\nRESULT" << record.token << record.toString();

    int token = record.token;
    if (token == -1)
        return;

    GdbCookie cmd = m_cookieForToken.take(token);

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    if (record.token < m_oldestAcceptableToken && isSkippable(cmd.type)) {
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        //qDebug() << "### SKIPPING OLD RESULT " << record.toString();
        //QMessageBox::information(m_mainWindow, tr("Skipped"), "xxx");
        return;
    }

#if 0
    qDebug() << "# handleOutput, "
        << "cmd type: " << cmd.type
        << "cmd synchronized: " << cmd.synchronized
        << "\n record: " << record.toString();
#endif

    // << "\n data: " << record.data.toString(true);

    if (cmd.type != GdbInvalidCommand)
        handleResult(record, cmd.type, cmd.cookie);

    if (cmd.synchronized) {
        --m_pendingRequests;
        PENDING_DEBUG("   TYPE " << cmd.type << " DECREMENTS PENDING TO: "
            << m_pendingRequests << cmd.command);
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        if (m_pendingRequests <= 0) {
            PENDING_DEBUG(" ....  AND TRIGGERS MODEL UPDATE");
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            updateWatchModel2();
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        }
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    } else {
        PENDING_DEBUG("   UNKNOWN TYPE " << cmd.type << " LEAVES PENDING AT: "
            << m_pendingRequests << cmd.command);
    }
}

void GdbEngine::handleResult(const GdbResultRecord & record, int type,
    const QVariant & cookie)
{
    switch (type) {
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        case GdbStubAttached:
            handleStubAttached();
            break;
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        case GdbExecNext:
        case GdbExecStep:
        case GdbExecNextI:
        case GdbExecStepI:
        case GdbExecContinue:
        case GdbExecFinish:
            // evil code sharing
            handleExecRun(record);
            break;
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        case GdbStart:
            handleStart(record);
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            break;
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        case GdbAttached:
            handleAttach();
            break;
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        case GdbInfoProc:
            handleInfoProc(record);
            break;
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        case GdbInfoThreads:
            handleInfoThreads(record);
            break;
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        case GdbExit:
            handleExit(record);
            break;
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        case GdbShowVersion:
            handleShowVersion(record);
            break;
        case GdbFileExecAndSymbols:
            handleFileExecAndSymbols(record);
            break;
        case GdbExecRunToFunction:
            // that should be "^running". We need to handle the resulting
            // "Stopped"
            //handleExecRunToFunction(record);
            break;
        case GdbExecInterrupt:
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            qq->notifyInferiorStopped();
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            break;
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#if 0
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        case GdbExecJumpToLine:
            handleExecJumpToLine(record);
            break;
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#endif
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#if 0
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        case GdbQueryPwd:
            handleQueryPwd(record);
            break;
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#endif
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        case GdbQuerySources:
            handleQuerySources(record);
            break;
        case GdbAsyncOutput2:
            handleAsyncOutput2(cookie.value<GdbMi>());
            break;
        case GdbInfoShared:
            handleInfoShared(record);
            break;
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        case GdbQueryDebuggingHelper:
            handleQueryDebuggingHelper(record);
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            break;
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        case GdbTemporaryContinue:
            continueInferior();
            q->showStatusMessage(tr("Continuing after temporary stop."));
            break;
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        case GdbTargetCore:
            handleTargetCore(record);
            break;
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        case BreakList:
            handleBreakList(record);
            break;
        case BreakInsert:
            handleBreakInsert(record, cookie.toInt());
            break;
        case BreakInsert1:
            handleBreakInsert1(record, cookie.toInt());
            break;
        case BreakInfo:
            handleBreakInfo(record, cookie.toInt());
            break;
        case BreakEnablePending:
        case BreakDelete:
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        case BreakEnable:
        case BreakDisable:
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            // nothing
            break;
        case BreakIgnore:
            handleBreakIgnore(record, cookie.toInt());
            break;
        case BreakCondition:
            handleBreakCondition(record, cookie.toInt());
            break;

        case DisassemblerList:
            handleDisassemblerList(record, cookie.toString());
            break;

        case ModulesList:
            handleModulesList(record);
            break;

        case RegisterListNames:
            handleRegisterListNames(record);
            break;
        case RegisterListValues:
            handleRegisterListValues(record);
            break;

        case StackListFrames:
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            handleStackListFrames(record, cookie.toBool());
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            break;
        case StackListThreads:
            handleStackListThreads(record, cookie.toInt());
            break;
        case StackSelectThread:
            handleStackSelectThread(record, cookie.toInt());
            break;
        case StackListLocals:
            handleStackListLocals(record);
            break;
        case StackListArguments:
            handleStackListArguments(record);
            break;

        case WatchVarListChildren:
            handleVarListChildren(record, cookie.value<WatchData>());
            break;
        case WatchVarCreate:
            handleVarCreate(record, cookie.value<WatchData>());
            break;
        case WatchVarAssign:
            handleVarAssign();
            break;
        case WatchEvaluateExpression:
            handleEvaluateExpression(record, cookie.value<WatchData>());
            break;
        case WatchToolTip:
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            handleToolTip(record, cookie.toByteArray());
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            break;
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        case WatchDebuggingHelperValue1:
            handleDebuggingHelperValue1(record, cookie.value<WatchData>());
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            break;
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        case WatchDebuggingHelperValue2:
            handleDebuggingHelperValue2(record, cookie.value<WatchData>());
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            break;
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        case WatchDebuggingHelperValue3:
            handleDebuggingHelperValue3(record, cookie.value<WatchData>());
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            break;

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        case WatchDebuggingHelperSetup:
            handleDebuggingHelperSetup(record);
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            break;

        default:
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            debugMessage(_("FIXME: GdbEngine::handleResult: "
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                "should not happen %1").arg(type));
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            break;
    }
}

void GdbEngine::executeDebuggerCommand(const QString &command)
{
    if (m_gdbProc.state() == QProcess::NotRunning) {
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        debugMessage(_("NO GDB PROCESS RUNNING, PLAIN CMD IGNORED: ") + command);
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        return;
    }

    GdbCookie cmd;
    cmd.command = command;
    cmd.type = -1;

    m_gdbProc.write(cmd.command.toLatin1() + "\r\n");
}

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void GdbEngine::handleTargetCore(const GdbResultRecord &record)
{
    Q_UNUSED(record);
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    qq->notifyInferiorStopped();
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    q->showStatusMessage(tr("Core file loaded."));

    q->resetLocation();

    //
    // Stack
    //
    qq->stackHandler()->setCurrentIndex(0);
    updateLocals(); // Quick shot

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    reloadStack();
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    if (supportsThreads())
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        sendSynchronizedCommand(_("-thread-list-ids"), StackListThreads, 0);
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    //
    // Disassembler
    //
    // XXX we have no data here ...
    //m_address = data.findChild("frame").findChild("addr").data();
    //qq->reloadDisassembler();

    //
    // Registers
    //
    qq->reloadRegisters();
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    // Gdb-Macro based DebuggingHelpers
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    sendCommand(_(
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        "define qdumpqstring\n"
        "set $i = 0\n"
        "set $l = $arg0->d->size\n"
        "set $p = $arg0->d->data\n"
        "while $i < $l\n"
        "printf \"%d \",$p[$i++]\n"
        "end\n"
        "printf \"\\n\"\n"
        "end\n"
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    ));
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    sendCommand(_(
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        "define qdumpqstringlist\n"
        "set $i = $arg0->d->begin\n"
        "set $e = $arg0->d->end\n"
        "while $i < $e\n"
        "printf \"%d \",$arg0->d->array + $i++\n"
        "end\n"
        "printf \"\\n\"\n"
        "end\n"
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    ));
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}

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#if 0
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void GdbEngine::handleQueryPwd(const GdbResultRecord &record)
{
    // FIXME: remove this special case as soon as 'pwd'
    // is supported by MI
    //qDebug() << "PWD OUTPUT:" <<  record.toString();
    // Gdb responses _unless_ we get an error first.
    if (record.resultClass == GdbResultDone) {
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        QByteArray pwd = record.data.findChild("consolestreamoutput").data();
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#ifdef Q_OS_LINUX
        // "5^done,{logstreamoutput="pwd ",consolestreamoutput
        // ="Working directory /home/apoenitz/dev/work/test1.  "}
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        int pos = pwd.indexOf("Working directory");
        pwd = pwd.mid(pos + 18);
        pwd = pwd.trimmed();
        if (pwd.endsWith('.'))
            pwd.chop(1);
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#endif
#ifdef Q_OS_WIN
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        FIXME: this is broken
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        // ~"Working directory C:\\Users\\Thomas\\Documents\\WBTest3\\debug.\n"
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        pwd = pwd.trimmed();
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#endif
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        m_pwd = QString::fromLocal8Bit(pwd);
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        debugMessage("PWD RESULT: " + m_pwd);
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    }
}
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#endif
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void GdbEngine::handleQuerySources(const GdbResultRecord &record)
{
    if (record.resultClass == GdbResultDone) {
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        QMap<QString, QString> oldShortToFull = m_shortToFullName;
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        m_shortToFullName.clear();
        m_fullToShortName.clear();
        // "^done,files=[{file="../../../../bin/gdbmacros/gdbmacros.cpp",
        // fullname="/data5/dev/ide/main/bin/gdbmacros/gdbmacros.cpp"},
        GdbMi files = record.data.findChild("files");
        foreach (const GdbMi &item, files.children()) {
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            QString fileName = QString::fromLocal8Bit(item.findChild("file").data());
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            GdbMi fullName = item.findChild("fullname");
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            QString full = QString::fromLocal8Bit(fullName.data());
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            #ifdef Q_OS_WIN
            full = QDir::cleanPath(full);
            #endif
            if (fullName.isValid() && QFileInfo(full).isReadable()) {
                //qDebug() << "STORING 2: " << fileName << full;
                m_shortToFullName[fileName] = full;
                m_fullToShortName[full] = fileName;
            }
        }
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        if (m_shortToFullName != oldShortToFull)
            qq->sourceFileWindow()->setSourceFiles(m_shortToFullName);
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    }
}

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void GdbEngine::handleInfoThreads(const GdbResultRecord &record)
{
    if (record.resultClass == GdbResultDone) {
        // FIXME: use something more robust
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        // WIN:     * 3 Thread 2312.0x4d0  0x7c91120f in ?? ()
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        // LINUX:   * 1 Thread 0x7f466273c6f0 (LWP 21455)  0x0000000000404542 in ...
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        QRegExp re(_("^\\*? +\\d+ +[Tt]hread (\\d+)\\.0x.* in"));
        QString data = _(record.data.findChild("consolestreamoutput").data());
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        if (re.indexIn(data) != -1)
            maybeHandleInferiorPidChanged(re.cap(1));
    }
}

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void GdbEngine::handleInfoProc(const GdbResultRecord &record)
{
    if (record.resultClass == GdbResultDone) {
        #if defined(Q_OS_MAC)
        //^done,process-id="85075"
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        maybeHandleInferiorPidChanged(_(record.data.findChild("process-id").data()));
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        #endif

        #if defined(Q_OS_LINUX) || defined(Q_OS_WIN)
        // FIXME: use something more robust
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        QRegExp re(__("process (\\d+)"));
        QString data = __(record.data.findChild("consolestreamoutput").data());
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        if (re.indexIn(data) != -1)
            maybeHandleInferiorPidChanged(re.cap(1));
        #endif
    }
}

void GdbEngine::handleInfoShared(const GdbResultRecord &record)
{
    if (record.resultClass == GdbResultDone) {
        // let the modules handler do the parsing
        handleModulesList(record);
    }
}

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#if 0
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void GdbEngine::handleExecJumpToLine(const GdbResultRecord &record)
{
    // FIXME: remove this special case as soon as 'jump'
    // is supported by MI
    // "&"jump /home/apoenitz/dev/work/test1/test1.cpp:242"
    // ~"Continuing at 0x4058f3."
    // ~"run1 (argc=1, argv=0x7fffb213a478) at test1.cpp:242"
    // ~"242\t x *= 2;"
    //109^done"
    qq->notifyInferiorStopped();
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    q->showStatusMessage(tr("Jumped. Stopped."));
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    QByteArray output = record.data.findChild("logstreamoutput").data();
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    if (output.isEmpty())
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        return;
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    int idx1 = output.indexOf(' ') + 1;
    if (idx1 > 0) {
        int idx2 = output.indexOf(':', idx1);
        if (idx2 > 0) {
            QString file = QString::fromLocal8Bit(output.mid(idx1, idx2 - idx1));
            int line = output.mid(idx2 + 1).toInt();
            q->gotoLocation(file, line, true);
        }
    }
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}
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#endif
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void GdbEngine::handleExecRunToFunction(const GdbResultRecord &record)
{
    // FIXME: remove this special case as soon as there's a real
    // reason given when the temporary breakpoint is hit.
    // reight now we get:
    // 14*stopped,thread-id="1",frame={addr="0x0000000000403ce4",
    // func="foo",args=[{name="str",value="@0x7fff0f450460"}],
    // file="main.cpp",fullname="/tmp/g/main.cpp",line="37"}
    qq->notifyInferiorStopped();
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    q->showStatusMessage(tr("Run to Function finished. Stopped."));
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    GdbMi frame = record.data.findChild("frame");
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    QString file = QString::fromLocal8Bit(frame.findChild("fullname").data());
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    int line = frame.findChild("line").data().toInt();
    qDebug() << "HIT: " << file << line << " IN " << frame.toString()
        << " -- " << record.toString();
    q->gotoLocation(file, line, true);
}

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static bool isExitedReason(const QByteArray &reason)
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{
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    return reason == "exited-normally"   // inferior exited normally
        || reason == "exited-signalled"  // inferior exited because of a signal
        //|| reason == "signal-received" // inferior received signal
        || reason == "exited";           // inferior exited
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}

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static bool isStoppedReason(const QByteArray &reason)
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{
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    return reason == "function-finished"  // -exec-finish
        || reason == "signal-received"  // handled as "isExitedReason"
        || reason == "breakpoint-hit"     // -exec-continue
        || reason == "end-stepping-range" // -exec-next, -exec-step
        || reason == "location-reached"   // -exec-until
        || reason == "access-watchpoint-trigger"
        || reason == "read-watchpoint-trigger"
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        #ifdef Q_OS_MAC
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        || reason.isEmpty()
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        #endif
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    ;
}

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void GdbEngine::handleAqcuiredInferior()
{
    #if defined(Q_OS_WIN)
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    sendCommand(_("info thread"), GdbInfoThreads);
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    #endif
    #if defined(Q_OS_LINUX)
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    sendCommand(_("info proc"), GdbInfoProc);
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    #endif
    #if defined(Q_OS_MAC)
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    sendCommand(_("info pid"), GdbInfoProc, QVariant(), NeedsStop);
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    #endif
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    if (theDebuggerBoolSetting(ListSourceFiles))
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        reloadSourceFiles();
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    tryLoadDebuggingHelpers();
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    #ifndef Q_OS_MAC
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    // intentionally after tryLoadDebuggingHelpers(),
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    // otherwise we'd interupt solib loading.
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    if (theDebuggerBoolSetting(AllPluginBreakpoints)) {
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        sendCommand(_("set auto-solib-add on"));
        sendCommand(_("set stop-on-solib-events 0"));
        sendCommand(_("sharedlibrary .*"));
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    } else if (theDebuggerBoolSetting(SelectedPluginBreakpoints)) {
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        sendCommand(_("set auto-solib-add on"));
        sendCommand(_("set stop-on-solib-events 1"));
        sendCommand(_("sharedlibrary ")
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          + theDebuggerStringSetting(SelectedPluginBreakpointsPattern));
    } else if (theDebuggerBoolSetting(NoPluginBreakpoints)) {
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        // should be like that already
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        sendCommand(_("set auto-solib-add off"));
        sendCommand(_("set stop-on-solib-events 0"));
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    }
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    #endif

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    // nicer to see a bit of the world we live in
    reloadModules();
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    attemptBreakpointSynchronization();
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}

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void GdbEngine::handleAsyncOutput(const GdbMi &data)
{
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    const QByteArray &reason = data.findChild("reason").data();
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    if (isExitedReason(reason)) {
        qq->notifyInferiorExited();
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        QString msg;
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        if (reason == "exited") {
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            msg = tr("Program exited with exit code %1")
                .arg(_(data.findChild("exit-code").toString()));
        } else if (reason == "exited-signalled" || reason == "signal-received") {
            msg = tr("Program exited after receiving signal %1")
                .arg(_(data.findChild("signal-name").toString()));
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        } else {
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            msg = tr("Program exited normally");
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        }
        q->showStatusMessage(msg);
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        sendCommand(_("-gdb-exit"), GdbExit);
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        return;
    }


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    //MAC: bool isFirstStop = data.findChild("bkptno").data() == "1";
    //!MAC: startSymbolName == data.findChild("frame").findChild("func")
    if (m_waitingForFirstBreakpointToBeHit) {
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        // If the executable dies already that early we might get something
        // like stdout:49*stopped,reason="exited",exit-code="0177"
        // This is handled now above.

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        qq->notifyInferiorStopped();
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        m_waitingForFirstBreakpointToBeHit = false;
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        //
        // this will "continue" if done
        m_waitingForBreakpointSynchronizationToContinue = true;
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        //
        // that's the "early stop"
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