Updated documentation.

[kdbg.git] / kdbg / debugger.cpp

// $Id$

// Copyright by Johannes Sixt
// This file is under GPL, the GNU General Public Licence

#include "debugger.h"
#include "dbgdriver.h"
#include "pgmargs.h"
#include "typetable.h"
#include "exprwnd.h"
#include "valarray.h"
#include <qregexp.h>
#include <qfileinfo.h>
#include <qlistbox.h>
#include <kapp.h>
#include <ksimpleconfig.h>
#include <kconfig.h>
#include <kwm.h>
#if QT_VERSION >= 200
#include <klocale.h>                    /* i18n */
#include <kmessagebox.h>
#else
#include <kmsgbox.h>
#endif
#include <ctype.h>
#include <stdlib.h>                     /* strtol, atoi */
#ifdef HAVE_UNISTD_H
#include <unistd.h>                     /* sleep(3) */
#endif
#include "mydebug.h"


KDebugger::KDebugger(QWidget* parent,
                     ExprWnd* localVars,
                     ExprWnd* watchVars,
                     QListBox* backtrace,
                     DebuggerDriver* driver
                     ) :
        QObject(parent, "debugger"),
        m_ttyLevel(ttyFull),
        m_haveExecutable(false),
        m_programActive(false),
        m_programRunning(false),
        m_sharedLibsListed(false),
        m_typeTable(0),
        m_programConfig(0),
        m_d(driver),
        m_localVariables(*localVars),
        m_watchVariables(*watchVars),
        m_btWindow(*backtrace),
        m_animationTimer(this),
        m_animationInterval(0)
{
    m_envVars.setAutoDelete(true);

    connect(&m_localVariables, SIGNAL(expanding(KTreeViewItem*,bool&)),
            SLOT(slotLocalsExpanding(KTreeViewItem*,bool&)));
    connect(&m_watchVariables, SIGNAL(expanding(KTreeViewItem*,bool&)),
            SLOT(slotWatchExpanding(KTreeViewItem*,bool&)));

    connect(&m_btWindow, SIGNAL(highlighted(int)), SLOT(gotoFrame(int)));

    connect(m_d, SIGNAL(activateFileLine(const QString&,int)),
            this, SIGNAL(activateFileLine(const QString&,int)));

    // debugger process
    connect(m_d, SIGNAL(processExited(KProcess*)), SLOT(gdbExited(KProcess*)));
    connect(m_d, SIGNAL(commandReceived(CmdQueueItem*,const char*)),
            SLOT(parse(CmdQueueItem*,const char*)));
    // we shouldn't do this, it's very unsafe (different arg lists):
    connect(m_d, SIGNAL(receivedStdout(KProcess*,char*,int)),
            SIGNAL(updateUI()));
    connect(m_d, SIGNAL(wroteStdin(KProcess*)), SIGNAL(updateUI()));
    connect(m_d, SIGNAL(inferiorRunning()), SLOT(slotInferiorRunning()));
    connect(m_d, SIGNAL(enterIdleState()), SLOT(backgroundUpdate()));

    // animation
    connect(&m_animationTimer, SIGNAL(timeout()), SIGNAL(animationTimeout()));
    // special update of animation
    connect(this, SIGNAL(updateUI()), SLOT(slotUpdateAnimation()));

    emit updateUI();
}

KDebugger::~KDebugger()
{
    if (m_programConfig != 0) {
        saveProgramSettings();
        m_programConfig->sync();
        delete m_programConfig;
    }
    // delete breakpoint objects
    for (int i = m_brkpts.size()-1; i >= 0; i--) {
        delete m_brkpts[i];
    }

    delete m_typeTable;
}


void KDebugger::saveSettings(KConfig* /*config*/)
{
}

void KDebugger::restoreSettings(KConfig* /*config*/)
{
}


//////////////////////////////////////////////////////////////////////
// external interface

const char GeneralGroup[] = "General";
const char DebuggerCmdStr[] = "DebuggerCmdStr";
const char TTYLevelEntry[] = "TTYLevel";

bool KDebugger::debugProgram(const QString& name)
{
    if (m_d->isRunning())
    {
        QApplication::setOverrideCursor(waitCursor);

        stopGdb();
        /*
         * We MUST wait until the slot gdbExited() has been called. But to
         * avoid a deadlock, we wait only for some certain maximum time.
         * Should this timeout be reached, the only reasonable thing one
         * could do then is exiting kdbg.
         */
        int maxTime = 20;               /* about 20 seconds */
        while (m_haveExecutable && maxTime > 0) {
            kapp->processEvents(1000);
            // give gdb time to die (and send a SIGCLD)
            ::sleep(1);
            --maxTime;
        }

        QApplication::restoreOverrideCursor();

        if (m_d->isRunning() || m_haveExecutable) {
            /* timed out! We can't really do anything useful now */
            TRACE("timed out while waiting for gdb to die!");
            return false;
        }
    }

    // create the program settings object
    openProgramConfig(name);

    // get debugger command from per-program settings
    if (m_programConfig != 0) {
        m_programConfig->setGroup(GeneralGroup);
        m_debuggerCmd = m_programConfig->readEntry(DebuggerCmdStr);
        // get terminal emulation level
        m_ttyLevel = TTYLevel(m_programConfig->readNumEntry(TTYLevelEntry, ttyFull));
    }
    // the rest is read in later in the handler of DCexecutable

    if (!startGdb()) {
        TRACE("startGdb failed");
        return false;
    }

    TRACE("before file cmd");
    m_d->executeCmd(DCexecutable, name);
    m_executable = name;

    // set remote target
    if (!m_remoteDevice.isEmpty()) {
        m_d->executeCmd(DCtargetremote, m_remoteDevice);
        m_d->queueCmd(DCbt, DebuggerDriver::QMoverride);
        m_d->queueCmd(DCframe, 0, DebuggerDriver::QMnormal);
        m_programActive = true;
        m_haveExecutable = true;
    }

    // create a type table
    m_typeTable = new ProgramTypeTable;
    m_sharedLibsListed = false;

    emit updateUI();

    return true;
}

void KDebugger::useCoreFile(QString corefile, bool batch)
{
    m_corefile = corefile;
    if (!batch) {
        CmdQueueItem* cmd = loadCoreFile();
        cmd->m_byUser = true;
    }
}

void KDebugger::programRun()
{
    if (!isReady())
        return;

    // when program is active, but not a core file, continue
    // otherwise run the program
    if (m_programActive && m_corefile.isEmpty()) {
        // gdb command: continue
        m_d->executeCmd(DCcont, true);
    } else {
        // gdb command: run
        m_d->executeCmd(DCrun, true);
        m_corefile = QString();
        m_programActive = true;
    }
    m_programRunning = true;
}

void KDebugger::attachProgram(const QString& pid)
{
    if (!isReady())
        return;

    m_attachedPid = pid;
    TRACE("Attaching to " + m_attachedPid);
    m_d->executeCmd(DCattach, m_attachedPid);
    m_programActive = true;
    m_programRunning = true;
}

void KDebugger::programRunAgain()
{
    if (canSingleStep()) {
        m_d->executeCmd(DCrun, true);
        m_corefile = QString();
        m_programRunning = true;
    }
}

void KDebugger::programStep()
{
    if (canSingleStep()) {
        m_d->executeCmd(DCstep, true);
        m_programRunning = true;
    }
}

void KDebugger::programNext()
{
    if (canSingleStep()) {
        m_d->executeCmd(DCnext, true);
        m_programRunning = true;
    }
}

void KDebugger::programFinish()
{
    if (canSingleStep()) {
        m_d->executeCmd(DCfinish, true);
        m_programRunning = true;
    }
}

void KDebugger::programKill()
{
    if (haveExecutable() && isProgramActive()) {
        if (m_programRunning) {
            m_d->interruptInferior();
        }
        // this is an emergency command; flush queues
        m_d->flushCommands(true);
        m_d->executeCmd(DCkill, true);
    }
}

bool KDebugger::runUntil(const QString& fileName, int lineNo)
{
    if (isReady() && m_programActive && !m_programRunning) {
        // strip off directory part of file name
        QString file = fileName;
#if QT_VERSION < 200
        file.detach();
#endif
        int offset = file.findRev("/");
        if (offset >= 0) {
            file.remove(0, offset+1);
        }
        m_d->executeCmd(DCuntil, file, lineNo, true);
        m_programRunning = true;
        return true;
    } else {
        return false;
    }
}

void KDebugger::programBreak()
{
    if (m_haveExecutable && m_programRunning) {
        m_d->interruptInferior();
    }
}

void KDebugger::programArgs()
{
    if (m_haveExecutable) {
        PgmArgs dlg(parentWidget(), m_executable, m_envVars);
        dlg.setArgs(m_programArgs);
        dlg.setWd(m_programWD);
        if (dlg.exec()) {
            updateProgEnvironment(dlg.args(), dlg.wd(), dlg.envVars());
        }
    }
}

bool KDebugger::setBreakpoint(QString file, int lineNo, bool temporary)
{
    if (!isReady()) {
        return false;
    }

    Breakpoint* bp = breakpointByFilePos(file, lineNo);
    if (bp == 0)
    {
        // no such breakpoint, so set a new one
        // strip off directory part of file name
#if QT_VERSION < 200
        file.detach();
#endif
        int offset = file.findRev("/");
        if (offset >= 0) {
            file.remove(0, offset+1);
        }
        m_d->executeCmd(temporary ? DCtbreakline : DCbreakline,
                        file, lineNo);
    }
    else
    {
        /*
         * If the breakpoint is disabled, enable it; if it's enabled,
         * delete that breakpoint.
         */
        if (bp->enabled) {
            m_d->executeCmd(DCdelete, bp->id);
        } else {
            m_d->executeCmd(DCenable, bp->id);
        }
    }
    return true;
}

bool KDebugger::enableDisableBreakpoint(QString file, int lineNo)
{
    if (!isReady()) {
        return false;
    }

    Breakpoint* bp = breakpointByFilePos(file, lineNo);
    if (bp == 0)
        return true;

    // toggle enabled/disabled state
    if (bp->enabled) {
        m_d->executeCmd(DCdisable, bp->id);
    } else {
        m_d->executeCmd(DCenable, bp->id);
    }
    return true;
}

bool KDebugger::canSingleStep()
{
    return isReady() && m_programActive && !m_programRunning;
}

bool KDebugger::canChangeBreakpoints()
{
    return isReady() && !m_programRunning;
}

bool KDebugger::isReady() const 
{
    return m_haveExecutable &&
        m_d->canExecuteImmediately();
}

bool KDebugger::isIdle() const
{
    return m_d->isIdle();
}


//////////////////////////////////////////////////////////
// debugger driver

bool KDebugger::startGdb()
{
    emit debuggerStarting();            /* must set m_inferiorTerminal */

    /*
     * If the per-program command string is empty, use the global setting
     * (which might also be empty, in which case the driver uses its
     * default).
     */
    QString debuggerCmd = m_debuggerCmd.isEmpty()  ?
        m_generalDebuggerCmd  :  m_debuggerCmd;
    m_explicitKill = false;
    if (!m_d->startup(debuggerCmd)) {
        return false;
    }

    /*
     * If we have an output terminal, we use it. Otherwise we will run the
     * program with input and output redirected to /dev/null. Other
     * redirections are also necessary depending on the tty emulation
     * level.
     */
    int redirect = RDNstdin|RDNstdout|RDNstderr;        /* redirect everything */
    if (!m_inferiorTerminal.isEmpty()) {
        switch (m_ttyLevel) {
        default:
        case ttyNone:
            // redirect everything
            break;
        case ttySimpleOutputOnly:
            redirect = RDNstdin;
            break;
        case ttyFull:
            redirect = 0;
            break;
        }
    }
    m_d->executeCmd(DCtty, m_inferiorTerminal, redirect);

    return true;
}

void KDebugger::stopGdb()
{
    m_explicitKill = true;
    m_d->terminate();
}

void KDebugger::gdbExited(KProcess*)
{
    /*
     * Save settings, but only if gdb has already processed "info line
     * main", otherwise we would save an empty config file, because it
     * isn't read in until then!
     */
    if (m_programConfig != 0) {
        if (m_haveExecutable) {
            saveProgramSettings();
            m_programConfig->sync();
        }
        delete m_programConfig;
        m_programConfig = 0;
    }

    // erase types
    delete m_typeTable;
    m_typeTable = 0;

    if (m_explicitKill) {
        TRACE("gdb exited normally");
    } else {
        QString msg = i18n("gdb exited unexpectedly.\n"
                           "Restart the session (e.g. with File|Executable).");
#if QT_VERSION < 200
        KMsgBox::message(parentWidget(), kapp->appName(), msg, KMsgBox::EXCLAMATION);
#else
        KMessageBox::error(parentWidget(), msg);
#endif
    }

    // reset state
    m_haveExecutable = false;
    m_executable = "";
    m_programActive = false;
    m_programRunning = false;
    m_explicitKill = false;
    m_debuggerCmd = QString();          /* use global setting at next start! */
    m_attachedPid = QString();          /* we are no longer attached to a process */

    // stop gear wheel and erase PC
    stopAnimation();
    emit updatePC(QString(), -1, 0);
}

void KDebugger::openProgramConfig(const QString& name)
{
    ASSERT(m_programConfig = 0);

    QFileInfo fi(name);
    QString pgmConfigFile = fi.dirPath(true);
    if (!pgmConfigFile.isEmpty()) {
        pgmConfigFile += '/';
    }
    pgmConfigFile += ".kdbgrc." + fi.fileName();
    TRACE("program config file = " + pgmConfigFile);
    // check whether we can write to the file
    QFile file(pgmConfigFile);
    bool readonly = true;
    bool openit = true;
    if (file.open(IO_ReadWrite)) {      /* don't truncate! */
        readonly = false;
        // the file exists now
    } else if (!file.open(IO_ReadOnly)) {
        /* file does not exist and cannot be created: don't use it */
        openit = false;
    }
    if (openit) {
        m_programConfig = new KSimpleConfig(pgmConfigFile, readonly);
    }
}

const char EnvironmentGroup[] = "Environment";
const char WatchGroup[] = "Watches";
const char FileVersion[] = "FileVersion";
const char ProgramArgs[] = "ProgramArgs";
const char WorkingDirectory[] = "WorkingDirectory";
const char Variable[] = "Var%d";
const char Value[] = "Value%d";
const char ExprFmt[] = "Expr%d";

void KDebugger::saveProgramSettings()
{
    ASSERT(m_programConfig != 0);
    m_programConfig->setGroup(GeneralGroup);
    m_programConfig->writeEntry(FileVersion, 1);
    m_programConfig->writeEntry(ProgramArgs, m_programArgs);
    m_programConfig->writeEntry(WorkingDirectory, m_programWD);
    m_programConfig->writeEntry(DebuggerCmdStr, m_debuggerCmd);
    m_programConfig->writeEntry(TTYLevelEntry, int(m_ttyLevel));

    // write environment variables
    m_programConfig->deleteGroup(EnvironmentGroup);
    m_programConfig->setGroup(EnvironmentGroup);
    QDictIterator<EnvVar> it = m_envVars;
    EnvVar* var;
    QString varName;
    QString varValue;
    for (int i = 0; (var = it) != 0; ++it, ++i) {
        varName.sprintf(Variable, i);
        varValue.sprintf(Value, i);
        m_programConfig->writeEntry(varName, it.currentKey());
        m_programConfig->writeEntry(varValue, var->value);
    }

    saveBreakpoints(m_programConfig);

    // watch expressions
    // first get rid of whatever was in this group
    m_programConfig->deleteGroup(WatchGroup);
    // then start a new group
    m_programConfig->setGroup(WatchGroup);
    KTreeViewItem* item = m_watchVariables.itemAt(0);
    int watchNum = 0;
    for (; item != 0; item = item->getSibling(), ++watchNum) {
        varName.sprintf(ExprFmt, watchNum);
        m_programConfig->writeEntry(varName, item->getText());
    }
}

void KDebugger::restoreProgramSettings()
{
    ASSERT(m_programConfig != 0);
    m_programConfig->setGroup(GeneralGroup);
    /*
     * We ignore file version for now we will use it in the future to
     * distinguish different versions of this configuration file.
     */
    m_debuggerCmd = m_programConfig->readEntry(DebuggerCmdStr);
    // m_ttyLevel has been read in already
    QString pgmArgs = m_programConfig->readEntry(ProgramArgs);
    QString pgmWd = m_programConfig->readEntry(WorkingDirectory);

    // read environment variables
    m_programConfig->setGroup(EnvironmentGroup);
    m_envVars.clear();
    QDict<EnvVar> pgmVars;
    EnvVar* var;
    QString varName;
    QString varValue;
    for (int i = 0;; ++i) {
        varName.sprintf(Variable, i);
        varValue.sprintf(Value, i);
        if (!m_programConfig->hasKey(varName)) {
            /* entry not present, assume that we've hit them all */
            break;
        }
        QString name = m_programConfig->readEntry(varName);
        if (name.isEmpty()) {
            // skip empty names
            continue;
        }
        var = new EnvVar;
        var->value = m_programConfig->readEntry(varValue);
        var->status = EnvVar::EVnew;
        pgmVars.insert(name, var);
    }

    updateProgEnvironment(pgmArgs, pgmWd, pgmVars);

    restoreBreakpoints(m_programConfig);

    // watch expressions
    m_programConfig->setGroup(WatchGroup);
    m_watchVariables.clear();
    for (int i = 0;; ++i) {
        varName.sprintf(ExprFmt, i);
        if (!m_programConfig->hasKey(varName)) {
            /* entry not present, assume that we've hit them all */
            break;
        }
        QString expr = m_programConfig->readEntry(varName);
        if (expr.isEmpty()) {
            // skip empty expressions
            continue;
        }
        addWatch(expr);
    }
}

/*
 * Breakpoints are saved one per group.
 */
const char BPGroup[] = "Breakpoint %d";
const char File[] = "File";
const char Line[] = "Line";
const char Temporary[] = "Temporary";
const char Enabled[] = "Enabled";
const char Condition[] = "Condition";

void KDebugger::saveBreakpoints(KSimpleConfig* config)
{
    QString groupName;
    int i;
    for (i = 0; uint(i) < m_brkpts.size(); i++) {
        groupName.sprintf(BPGroup, i);
        config->setGroup(groupName);
        Breakpoint* bp = m_brkpts[i];
        config->writeEntry(File, bp->fileName);
        config->writeEntry(Line, bp->lineNo);
        config->writeEntry(Temporary, bp->temporary);
        config->writeEntry(Enabled, bp->enabled);
        if (bp->condition.isEmpty())
            config->deleteEntry(Condition, false);
        else
            config->writeEntry(Condition, bp->condition);
        // we do not save the ignore count
    }
    // delete remaining groups
    // we recognize that a group is present if there is an Enabled entry
    for (;; i++) {
        groupName.sprintf(BPGroup, i);
        config->setGroup(groupName);
        if (!config->hasKey(Enabled)) {
            /* group not present, assume that we've hit them all */
            break;
        }
        config->deleteGroup(groupName);
    }
}

void KDebugger::restoreBreakpoints(KSimpleConfig* config)
{
    QString groupName;
    QString fileName;
    int lineNo;
    bool enabled, temporary;
    QString condition;
    /*
     * We recognize the end of the list if there is no Enabled entry
     * present.
     */
    for (int i = 0;; i++) {
        groupName.sprintf(BPGroup, i);
        config->setGroup(groupName);
        if (!config->hasKey(Enabled)) {
            /* group not present, assume that we've hit them all */
            break;
        }
        fileName = config->readEntry(File);
        lineNo = config->readNumEntry(Line, -1);
        if (lineNo < 0 || fileName.isEmpty())
            continue;
        enabled = config->readBoolEntry(Enabled, true);
        temporary = config->readBoolEntry(Temporary, false);
        condition = config->readEntry(Condition);
        /*
         * Add the breakpoint. We assume that we have started a new
         * instance of gdb, because we assign the breakpoint ids ourselves,
         * starting with 1. Then we use this id to disable the breakpoint,
         * if necessary. If this assignment of ids doesn't work, (maybe
         * because this isn't a fresh gdb at all), we disable the wrong
         * breakpoint! Oh well... for now it works.
         */
        m_d->executeCmd(temporary ? DCtbreakline : DCbreakline,
                        fileName, lineNo);
        if (!enabled) {
            m_d->executeCmd(DCdisable, i+1);
        }
        if (!condition.isEmpty()) {
            m_d->executeCmd(DCcondition, condition, i+1);
        }
    }
    m_d->queueCmd(DCinfobreak, DebuggerDriver::QMoverride);
}


// parse output of command cmd
void KDebugger::parse(CmdQueueItem* cmd, const char* output)
{
    ASSERT(cmd != 0);                   /* queue mustn't be empty */

    TRACE(QString(__PRETTY_FUNCTION__) + " parsing " + output);

    switch (cmd->m_cmd) {
    case DCtargetremote:
        // the output (if any) is uninteresting
    case DCsetargs:
    case DCtty:
        // there is no output
    case DCsetenv:
    case DCunsetenv:
        /* if value is empty, we see output, but we don't care */
        break;
    case DCcd:
        /* display gdb's message in the status bar */
        m_d->parseChangeWD(output, m_statusMessage);
        emit updateStatusMessage();
        break;
    case DCinitialize:
        break;
    case DCexecutable:
        if (m_d->parseChangeExecutable(output, m_statusMessage))
        {
            // success; restore breakpoints etc.
            if (m_programConfig != 0) {
                restoreProgramSettings();
            }
            // load file containing main() or core file
            if (m_corefile.isEmpty()) {
                if (m_remoteDevice.isEmpty())
                    m_d->queueCmd(DCinfolinemain, DebuggerDriver::QMnormal);
            } else {
                // load core file
                loadCoreFile();
            }
            if (!m_statusMessage.isEmpty())
                emit updateStatusMessage();
        } else {
            QString msg = "gdb: " + m_statusMessage;
#if QT_VERSION < 200
            KMsgBox::message(parentWidget(), kapp->appName(), msg,
                             KMsgBox::STOP, i18n("OK"));
#else
            KMessageBox::sorry(parentWidget(), msg);
#endif
            m_executable = "";
            m_corefile = "";            /* don't process core file */
            m_haveExecutable = false;
        }
        break;
    case DCcorefile:
        // in any event we have an executable at this point
        m_haveExecutable = true;
        if (m_d->parseCoreFile(output)) {
            // loading a core is like stopping at a breakpoint
            m_programActive = true;
            handleRunCommands(output);
            // do not reset m_corefile
        } else {
            // report error
            QString msg = m_d->driverName() + ": " + QString(output);
#if QT_VERSION < 200
            KMsgBox::message(parentWidget(), kapp->appName(), msg,
                             KMsgBox::EXCLAMATION, i18n("OK"));
#else
            KMessageBox::sorry(parentWidget(), msg);
#endif
            // if core file was loaded from command line, revert to info line main
            if (!cmd->m_byUser) {
                m_d->queueCmd(DCinfolinemain, DebuggerDriver::QMnormal);
            }
            m_corefile = QString();     /* core file not available any more */
        }
        break;
    case DCinfolinemain:
        // ignore the output, marked file info follows
        m_haveExecutable = true;
        break;
    case DCinfolocals:
        // parse local variables
        if (output[0] != '\0') {
            handleLocals(output);
        }
        break;
    case DCinforegisters:
        handleRegisters(output);
        break;
    case DCframe:
        handleFrameChange(output);
        updateAllExprs();
        break;
    case DCbt:
        handleBacktrace(output);
        updateAllExprs();
        break;
    case DCprint:
        handlePrint(cmd, output);
        break;
    case DCattach:
    case DCrun:
    case DCcont:
    case DCstep:
    case DCnext:
    case DCfinish:
    case DCuntil:
        handleRunCommands(output);
        break;
    case DCkill:
        m_programRunning = m_programActive = false;
        // erase PC
        emit updatePC(QString(), -1, 0);
        break;
    case DCbreaktext:
    case DCbreakline:
    case DCtbreakline:
        newBreakpoint(output);
        // fall through
    case DCdelete:
    case DCenable:
    case DCdisable:
        // these commands need immediate response
        m_d->queueCmd(DCinfobreak, DebuggerDriver::QMoverrideMoreEqual);
        break;
    case DCinfobreak:
        // note: this handler must not enqueue a command, since
        // DCinfobreak is used at various different places.
        updateBreakList(output);
        emit lineItemsChanged();
        break;
    case DCfindType:
        handleFindType(cmd, output);
        break;
    case DCprintStruct:
    case DCprintQStringStruct:
        handlePrintStruct(cmd, output);
        break;
    case DCinfosharedlib:
        handleSharedLibs(output);
        break;
    case DCcondition:
    case DCignore:
        // we are not interested in the output
        break;
    }
}

void KDebugger::backgroundUpdate()
{
    /*
     * If there are still expressions that need to be updated, then do so.
     */
    if (m_programActive)
        evalExpressions();
}

void KDebugger::handleRunCommands(const char* output)
{
    uint flags = m_d->parseProgramStopped(output, m_statusMessage);
    emit updateStatusMessage();

    m_programActive = flags & DebuggerDriver::SFprogramActive;

    // refresh files if necessary
    if (flags & DebuggerDriver::SFrefreshSource) {
        TRACE("re-reading files");
        emit executableUpdated();
    }

    /*
     * If we stopped at a breakpoint, we must update the breakpoint list
     * because the hit count changes. Also, if the breakpoint was temporary
     * it would go away now.
     */
    if ((flags & (DebuggerDriver::SFrefreshBreak|DebuggerDriver::SFrefreshSource)) ||
        haveTemporaryBP())
    {
        m_d->queueCmd(DCinfobreak, DebuggerDriver::QMoverride);
    }

    /*
     * If we haven't listed the shared libraries yet, do so. We must do
     * this before we emit any commands that list variables, since the type
     * libraries depend on the shared libraries.
     */
    if (!m_sharedLibsListed) {
        // must be a high-priority command!
        m_d->executeCmd(DCinfosharedlib);
    }

    // get the backtrace if the program is running
    if (m_programActive) {
        m_d->queueCmd(DCbt, DebuggerDriver::QMoverride);
    } else {
        // program finished: erase PC
        emit updatePC(QString(), -1, 0);
        // dequeue any commands in the queues
        m_d->flushCommands();
    }

    m_programRunning = false;
}

void KDebugger::slotInferiorRunning()
{
    m_programRunning = true;
}

void KDebugger::updateAllExprs()
{
    if (!m_programActive)
        return;

    // retrieve local variables
    m_d->queueCmd(DCinfolocals, DebuggerDriver::QMoverride);

    // retrieve registers
    m_d->queueCmd(DCinforegisters, DebuggerDriver::QMoverride);

    // update watch expressions
    KTreeViewItem* item = m_watchVariables.itemAt(0);
    for (; item != 0; item = item->getSibling()) {
        m_watchEvalExpr.append(static_cast<VarTree*>(item));
    }
}

void KDebugger::updateProgEnvironment(const QString& args, const QString& wd,
                                      const QDict<EnvVar>& newVars)
{
    m_programArgs = args;
    m_d->executeCmd(DCsetargs, m_programArgs);
    TRACE("new pgm args: " + m_programArgs + "\n");

    m_programWD = wd.stripWhiteSpace();
    if (!m_programWD.isEmpty()) {
        m_d->executeCmd(DCcd, m_programWD);
        TRACE("new wd: " + m_programWD + "\n");
    }

    QDictIterator<EnvVar> it = newVars;
    EnvVar* val;
    for (; (val = it) != 0; ++it) {
        switch (val->status) {
        case EnvVar::EVnew:
            m_envVars.insert(it.currentKey(), val);
            // fall thru
        case EnvVar::EVdirty:
            // the value must be in our list
            ASSERT(m_envVars[it.currentKey()] == val);
            // update value
            m_d->executeCmd(DCsetenv, it.currentKey(), val->value);
            break;
        case EnvVar::EVdeleted:
            // must be in our list
            ASSERT(m_envVars[it.currentKey()] == val);
            // delete value
            m_d->executeCmd(DCsetenv, it.currentKey());
            m_envVars.remove(it.currentKey());
            break;
        default:
            ASSERT(false);
        case EnvVar::EVclean:
            // variable not changed
            break;
        }
    }
}

void KDebugger::handleLocals(const char* output)
{
    // retrieve old list of local variables
    QStrList oldVars;
    m_localVariables.exprList(oldVars);

    /*
     *  Get local variables.
     */
    QList<VarTree> newVars;
    parseLocals(output, newVars);

    /*
     * Clear any old VarTree item pointers, so that later we don't access
     * dangling pointers.
     */
    m_localVariables.clearPendingUpdates();

    // reduce flicker
    bool autoU = m_localVariables.autoUpdate();
    m_localVariables.setAutoUpdate(false);
    bool repaintNeeded = false;

    /*
     * Match old variables against new ones.
     */
    for (const char* n = oldVars.first(); n != 0; n = oldVars.next()) {
        // lookup this variable in the list of new variables
        VarTree* v = newVars.first();
        while (v != 0 && strcmp(v->getText(), n) != 0) {
            v = newVars.next();
        }
        if (v == 0) {
            // old variable not in the new variables
            TRACE(QString("old var deleted: ") + n);
            v = m_localVariables.topLevelExprByName(n);
            removeExpr(&m_localVariables, v);
            if (v != 0) repaintNeeded = true;
        } else {
            // variable in both old and new lists: update
            TRACE(QString("update var: ") + n);
            m_localVariables.updateExpr(newVars.current());
            // remove the new variable from the list
            newVars.remove();
            delete v;
#if QT_VERSION >= 200
            repaintNeeded = true;
#endif
        }
    }
    // insert all remaining new variables
    for (VarTree* v = newVars.first(); v != 0; v = newVars.next()) {
        TRACE("new var: " + v->getText());
        m_localVariables.insertExpr(v);
        repaintNeeded = true;
    }

    // repaint
    m_localVariables.setAutoUpdate(autoU);
    if (repaintNeeded && autoU && m_localVariables.isVisible())
        m_localVariables.repaint();
}

void KDebugger::parseLocals(const char* output, QList<VarTree>& newVars)
{
    QList<VarTree> vars;
    m_d->parseLocals(output, vars);

    QString origName;                   /* used in renaming variables */
    while (vars.count() > 0)
    {
        VarTree* variable = vars.take(0);
        // get some types
        variable->inferTypesOfChildren(*m_typeTable);
        /*
         * When gdb prints local variables, those from the innermost block
         * come first. We run through the list of already parsed variables
         * to find duplicates (ie. variables that hide local variables from
         * a surrounding block). We keep the name of the inner variable, but
         * rename those from the outer block so that, when the value is
         * updated in the window, the value of the variable that is
         * _visible_ changes the color!
         */
        int block = 0;
        origName = variable->getText();
        for (VarTree* v = newVars.first(); v != 0; v = newVars.next()) {
            if (variable->getText() == v->getText()) {
                // we found a duplicate, change name
                block++;
                QString newName = origName + " (" + QString().setNum(block) + ")";
                variable->setText(newName);
            }
        }
        newVars.append(variable);
    }
}

bool KDebugger::handlePrint(CmdQueueItem* cmd, const char* output)
{
    ASSERT(cmd->m_expr != 0);

    VarTree* variable = parseExpr(output, true);
    if (variable == 0)
        return false;

    // set expression "name"
    variable->setText(cmd->m_expr->getText());

    if (cmd->m_expr->m_varKind == VarTree::VKpointer) {
        /*
         * We must insert a dummy parent, because otherwise variable's value
         * would overwrite cmd->m_expr's value.
         */
        VarTree* dummyParent = new VarTree(variable->getText(), VarTree::NKplain);
        dummyParent->m_varKind = VarTree::VKdummy;
        // the name of the parsed variable is the address of the pointer
        QString addr = "*" + cmd->m_expr->m_value;
        variable->setText(addr);
        variable->m_nameKind = VarTree::NKaddress;

        dummyParent->appendChild(variable);
        dummyParent->setDeleteChildren(true);
        TRACE("update ptr: " + cmd->m_expr->getText());
        cmd->m_exprWnd->updateExpr(cmd->m_expr, dummyParent);
        delete dummyParent;
    } else {
        TRACE("update expr: " + cmd->m_expr->getText());
        cmd->m_exprWnd->updateExpr(cmd->m_expr, variable);
        delete variable;
    }

    evalExpressions();                  /* enqueue dereferenced pointers */

    return true;
}

VarTree* KDebugger::parseExpr(const char* output, bool wantErrorValue)
{
    VarTree* variable;

    // check for error conditions
    bool goodValue = m_d->parsePrintExpr(output, wantErrorValue, variable);

    if (variable != 0 && goodValue)
    {
        // get some types
        variable->inferTypesOfChildren(*m_typeTable);
    }
    return variable;
}

// parse the output of bt
void KDebugger::handleBacktrace(const char* output)
{
    // reduce flicker
    m_btWindow.setAutoUpdate(false);

    m_btWindow.clear();

    QList<StackFrame> stack;
    m_d->parseBackTrace(output, stack);

    if (stack.count() > 0) {
        StackFrame* frm = stack.take(0);
        // first frame must set PC
        // note: frm->lineNo is zero-based
        emit updatePC(frm->fileName, frm->lineNo, frm->frameNo);

        do {
            QString func;
            if (frm->var != 0)
                func = frm->var->getText();
            else
                func = frm->fileName + ":" + QString().setNum(frm->lineNo+1);
            m_btWindow.insertItem(func);
            TRACE("frame " + func + " (" + frm->fileName + ":" +
                  QString().setNum(frm->lineNo+1) + ")");
            delete frm;
        }
        while ((frm = stack.take()) != 0);
    }

    m_btWindow.setAutoUpdate(true);
    m_btWindow.repaint();
}

void KDebugger::gotoFrame(int frame)
{
    m_d->executeCmd(DCframe, frame);
}

void KDebugger::handleFrameChange(const char* output)
{
    QString fileName;
    int frameNo;
    int lineNo;
    if (m_d->parseFrameChange(output, frameNo, fileName, lineNo)) {
        /* lineNo can be negative here if we can't find a file name */
        emit updatePC(fileName, lineNo, frameNo);
    } else {
        emit updatePC(fileName, -1, frameNo);
    }
}

void KDebugger::evalExpressions()
{
    // evaluate expressions in the following order:
    //   watch expressions
    //   pointers in local variables
    //   pointers in watch expressions
    //   types in local variables
    //   types in watch expressions
    //   pointers in 'this'
    //   types in 'this'
    
    VarTree* exprItem = m_watchEvalExpr.first();
    if (exprItem != 0) {
        m_watchEvalExpr.remove();
        QString expr = exprItem->computeExpr();
        TRACE("watch expr: " + expr);
        CmdQueueItem* cmd = m_d->queueCmd(DCprint, expr, DebuggerDriver::QMoverride);
        // remember which expr this was
        cmd->m_expr = exprItem;
        cmd->m_exprWnd = &m_watchVariables;
    } else {
        ExprWnd* wnd;
        VarTree* exprItem;
#define POINTER(widget) \
                wnd = &widget; \
                exprItem = widget.nextUpdatePtr(); \
                if (exprItem != 0) goto pointer
#define STRUCT(widget) \
                wnd = &widget; \
                exprItem = widget.nextUpdateStruct(); \
                if (exprItem != 0) goto ustruct
#define TYPE(widget) \
                wnd = &widget; \
                exprItem = widget.nextUpdateType(); \
                if (exprItem != 0) goto type
    repeat:
        POINTER(m_localVariables);
        POINTER(m_watchVariables);
        STRUCT(m_localVariables);
        STRUCT(m_watchVariables);
        TYPE(m_localVariables);
        TYPE(m_watchVariables);
#undef POINTER
#undef STRUCT
#undef TYPE
        return;

        pointer:
        // we have an expression to send
        dereferencePointer(wnd, exprItem, false);
        return;

        ustruct:
        // paranoia
        if (exprItem->m_type == 0 || exprItem->m_type == TypeInfo::unknownType())
            goto repeat;
        evalInitialStructExpression(exprItem, wnd, false);
        return;

        type:
        /*
         * Sometimes a VarTree gets registered twice for a type update. So
         * it may happen that it has already been updated. Hence, we ignore
         * it here and go on to the next task.
         */
        if (exprItem->m_type != 0)
            goto repeat;
        determineType(wnd, exprItem);
    }
}

void KDebugger::dereferencePointer(ExprWnd* wnd, VarTree* exprItem,
                                   bool immediate)
{
    ASSERT(exprItem->m_varKind == VarTree::VKpointer);

    QString expr = exprItem->computeExpr();
    TRACE("dereferencing pointer: " + expr);
    QString queueExpr = "*(" + expr + ")";
    CmdQueueItem* cmd;
    if (immediate) {
        cmd = m_d->queueCmd(DCprint, queueExpr, DebuggerDriver::QMoverrideMoreEqual);
    } else {
        cmd = m_d->queueCmd(DCprint, queueExpr, DebuggerDriver::QMoverride);
    }
    // remember which expr this was
    cmd->m_expr = exprItem;
    cmd->m_exprWnd = wnd;
}

void KDebugger::determineType(ExprWnd* wnd, VarTree* exprItem)
{
    ASSERT(exprItem->m_varKind == VarTree::VKstruct);

    QString expr = exprItem->computeExpr();
    TRACE("get type of: " + expr);
    CmdQueueItem* cmd;
    cmd = m_d->queueCmd(DCfindType, expr, DebuggerDriver::QMoverride);

    // remember which expr this was
    cmd->m_expr = exprItem;
    cmd->m_exprWnd = wnd;
}

void KDebugger::handleFindType(CmdQueueItem* cmd, const char* output)
{
    QString type;
    if (m_d->parseFindType(output, type))
    {
        ASSERT(cmd != 0 && cmd->m_expr != 0);

        TypeInfo* info = m_typeTable->lookup(type);

        if (info == 0) {
            /*
             * We've asked gdb for the type of the expression in
             * cmd->m_expr, but it returned a name we don't know. The base
             * class (and member) types have been checked already (at the
             * time when we parsed that particular expression). Now it's
             * time to derive the type from the base classes as a last
             * resort.
             */
            info = cmd->m_expr->inferTypeFromBaseClass();
            // if we found a type through this method, register an alias
            if (info != 0) {
                TRACE("infered alias: " + type);
                m_typeTable->registerAlias(type, info);
            }
        }
        if (info == 0) {
            TRACE("unknown type");
            cmd->m_expr->m_type = TypeInfo::unknownType();
        } else {
            cmd->m_expr->m_type = info;
            /* since this node has a new type, we get its value immediately */
            evalInitialStructExpression(cmd->m_expr, cmd->m_exprWnd, false);
            return;
        }
    }

    evalExpressions();                  /* queue more of them */
}

void KDebugger::handlePrintStruct(CmdQueueItem* cmd, const char* output)
{
    VarTree* var = cmd->m_expr;
    ASSERT(var != 0);
    ASSERT(var->m_varKind == VarTree::VKstruct);

    VarTree* partExpr;
    if (cmd->m_cmd != DCprintQStringStruct) {
        partExpr = parseExpr(output, false);
    } else {
        partExpr = m_d->parseQCharArray(output, false);
    }
    bool errorValue =
        partExpr == 0 ||
        /* we only allow simple values at the moment */
        partExpr->childCount() != 0;

    QString partValue;
    if (errorValue)
    {
        partValue = "???";
    } else {
        partValue = partExpr->m_value;
    }
    delete partExpr;
    partExpr = 0;

    /*
     * Updating a struct value works like this: var->m_partialValue holds
     * the value that we have gathered so far (it's been initialized with
     * var->m_type->m_displayString[0] earlier). Each time we arrive here,
     * we append the printed result followed by the next
     * var->m_type->m_displayString to var->m_partialValue.
     * 
     * If the expression we just evaluated was a guard expression, and it
     * resulted in an error, we must not evaluate the real expression, but
     * go on to the next index. (We must still add the ??? to the value).
     * 
     * Next, if this was the length expression, we still have not seen the
     * real expression, but the length of a QString.
     */
    ASSERT(var->m_exprIndex >= 0 && var->m_exprIndex <= typeInfoMaxExpr);

    if (errorValue || !var->m_exprIndexUseGuard)
    {
        // add current partValue (which might be ???)
#if QT_VERSION < 200
        var->m_partialValue.detach();
#endif
        var->m_partialValue += partValue;
        var->m_exprIndex++;             /* next part */
        var->m_exprIndexUseGuard = true;
        var->m_partialValue += var->m_type->m_displayString[var->m_exprIndex];
    }
    else
    {
        // this was a guard expression that succeeded
        // go for the real expression
        var->m_exprIndexUseGuard = false;
    }

    /* go for more sub-expressions if needed */
    if (var->m_exprIndex < var->m_type->m_numExprs) {
        /* queue a new print command with quite high priority */
        evalStructExpression(var, cmd->m_exprWnd, true);
        return;
    }

    cmd->m_exprWnd->updateStructValue(var);

    evalExpressions();                  /* enqueue dereferenced pointers */
}

/* queues the first printStruct command for a struct */
void KDebugger::evalInitialStructExpression(VarTree* var, ExprWnd* wnd, bool immediate)
{
    var->m_exprIndex = 0;
    var->m_exprIndexUseGuard = true;
    var->m_partialValue = var->m_type->m_displayString[0];
    evalStructExpression(var, wnd, immediate);
}

/* queues a printStruct command; var must have been initialized correctly */
void KDebugger::evalStructExpression(VarTree* var, ExprWnd* wnd, bool immediate)
{
    QString base = var->computeExpr();
    QString exprFmt;
    if (var->m_exprIndexUseGuard) {
        exprFmt = var->m_type->m_guardStrings[var->m_exprIndex];
        if (exprFmt.isEmpty()) {
            // no guard, omit it and go to expression
            var->m_exprIndexUseGuard = false;
        }
    }
    if (!var->m_exprIndexUseGuard) {
        exprFmt = var->m_type->m_exprStrings[var->m_exprIndex];
    }

    SIZED_QString(expr, exprFmt.length() + base.length() + 10);
    expr.sprintf(exprFmt, base.data());

    DbgCommand dbgCmd = DCprintStruct;
    // check if this is a QString::Data
    if (strncmp(expr, "/QString::Data ", 15) == 0)
    {
        if (m_typeTable->parseQt2QStrings())
        {
            expr = expr.mid(15, expr.length()); /* strip off /QString::Data */
            dbgCmd = DCprintQStringStruct;
        } else {
            /*
             * This should not happen: the type libraries should be set up
             * in a way that this can't happen. If this happens
             * nevertheless it means that, eg., kdecore was loaded but qt2
             * was not (only qt2 enables the QString feature).
             */
            // TODO: remove this "print"; queue the next printStruct instead
            expr = "*0";
        }
    } else {
        expr = expr;
    }
    TRACE("evalStruct: " + expr + (var->m_exprIndexUseGuard ? " // guard" : " // real"));
    CmdQueueItem* cmd = m_d->queueCmd(dbgCmd, expr,
                                      immediate  ?  DebuggerDriver::QMoverrideMoreEqual
                                      : DebuggerDriver::QMnormal);

    // remember which expression this was
    cmd->m_expr = var;
    cmd->m_exprWnd = wnd;
}

/* removes expression from window */
void KDebugger::removeExpr(ExprWnd* wnd, VarTree* var)
{
    if (var == 0)
        return;

    // must remove any references to var from command queues
    m_d->dequeueCmdByVar(var);

    wnd->removeExpr(var);
}

void KDebugger::handleSharedLibs(const char* output)
{
    // delete all known libraries
    m_sharedLibs.clear();

    // parse the table of shared libraries
    m_d->parseSharedLibs(output, m_sharedLibs);
    m_sharedLibsListed = true;

    // get type libraries
    m_typeTable->loadLibTypes(m_sharedLibs);
}

CmdQueueItem* KDebugger::loadCoreFile()
{
    return m_d->queueCmd(DCcorefile, m_corefile, DebuggerDriver::QMoverride);
}

void KDebugger::slotLocalsExpanding(KTreeViewItem* item, bool& allow)
{
    exprExpandingHelper(&m_localVariables, item, allow);
}

void KDebugger::slotWatchExpanding(KTreeViewItem* item, bool& allow)
{
    exprExpandingHelper(&m_watchVariables, item, allow);
}

void KDebugger::exprExpandingHelper(ExprWnd* wnd, KTreeViewItem* item, bool&)
{
    VarTree* exprItem = static_cast<VarTree*>(item);
    if (exprItem->m_varKind != VarTree::VKpointer) {
        return;
    }
    dereferencePointer(wnd, exprItem, true);
}

// add the expression in the edit field to the watch expressions
void KDebugger::addWatch(const QString& t)
{
    QString expr = t.stripWhiteSpace();
    if (expr.isEmpty())
        return;
    VarTree* exprItem = new VarTree(expr, VarTree::NKplain);
    m_watchVariables.insertExpr(exprItem);

    // if we are boring ourselves, send down the command
    if (m_programActive) {
        m_watchEvalExpr.append(exprItem);
        if (m_d->isIdle()) {
            evalExpressions();
        }
    }
}

// delete a toplevel watch expression
void KDebugger::slotDeleteWatch()
{
    // delete only allowed while debugger is idle; or else we might delete
    // the very expression the debugger is currently working on...
    if (!m_d->isIdle())
        return;

    int index = m_watchVariables.currentItem();
    if (index < 0)
        return;
    
    VarTree* item = static_cast<VarTree*>(m_watchVariables.itemAt(index));
    if (!item->isToplevelExpr())
        return;

    // remove the variable from the list to evaluate
    if (m_watchEvalExpr.findRef(item) >= 0) {
        m_watchEvalExpr.remove();
    }
    removeExpr(&m_watchVariables, item);
    // item is invalid at this point!
}

void KDebugger::startAnimation(bool fast)
{
    int interval = fast ? 50 : 150;
    if (!m_animationTimer.isActive()) {
        m_animationTimer.start(interval);
    } else if (m_animationInterval != interval) {
        m_animationTimer.changeInterval(interval);
    }
    m_animationInterval = interval;
}

void KDebugger::stopAnimation()
{
    if (m_animationTimer.isActive()) {
        m_animationTimer.stop();
        m_animationInterval = 0;
    }
}

void KDebugger::slotUpdateAnimation()
{
    if (m_d->isIdle()) {
        stopAnimation();
    } else {
        /*
         * Slow animation while program is stopped (i.e. while variables
         * are displayed)
         */
        bool slow = isReady() && m_programActive && !m_programRunning;
        startAnimation(!slow);
    }
}

void KDebugger::handleRegisters(const char* output)
{
    QList<RegisterInfo> regs;
    m_d->parseRegisters(output, regs);

    emit registersChanged(regs);

    // delete them all
    regs.setAutoDelete(true);
}

/*
 * The output of the DCbreak* commands has more accurate information about
 * the file and the line number.
 */
void KDebugger::newBreakpoint(const char* output)
{
    int id;
    QString file;
    int lineNo;
    if (!m_d->parseBreakpoint(output, id, file, lineNo))
        return;

    // see if it is new
    for (int i = m_brkpts.size()-1; i >= 0; i--) {
        if (m_brkpts[i]->id == id) {
            // not new; update
            m_brkpts[i]->fileName = file;
            m_brkpts[i]->lineNo = lineNo;
            return;
        }
    }
    // yes, new
    Breakpoint* bp = new Breakpoint;
    bp->id = id;
    bp->temporary = false;
    bp->enabled = true;
    bp->hitCount = 0;
    bp->ignoreCount = 0;
    bp->fileName = file;
    bp->lineNo = lineNo;
    int n = m_brkpts.size();
    m_brkpts.resize(n+1);
    m_brkpts[n] = bp;
}

void KDebugger::updateBreakList(const char* output)
{
    // get the new list
    QList<Breakpoint> brks;
    brks.setAutoDelete(false);
    m_d->parseBreakList(output, brks);

    // merge new information into existing breakpoints

    QArray<Breakpoint*> oldbrks = m_brkpts;

    // move parsed breakpoints into m_brkpts
    m_brkpts.detach();
    m_brkpts.resize(brks.count());
    int n = 0;
    for (Breakpoint* bp = brks.first(); bp != 0; bp = brks.next())
    {
        m_brkpts[n++] = bp;
    }

    // go through all old breakpoints
    for (int i = oldbrks.size()-1; i >= 0; i--) {
        // is this one still alive?
        for (int j = m_brkpts.size()-1; j >= 0; j--)
        {
            if (m_brkpts[j]->id == oldbrks[i]->id) {
                // yes, it is
                // keep accurate location
                m_brkpts[j]->fileName = oldbrks[i]->fileName;
                m_brkpts[j]->lineNo = oldbrks[i]->lineNo;
                break;
            }
        }
    }

    // delete old breakpoints
    for (int i = oldbrks.size()-1; i >= 0; i--) {
        delete oldbrks[i];
    }

    emit breakpointsChanged();
}

// look if there is at least one temporary breakpoint
bool KDebugger::haveTemporaryBP() const
{
    for (int i = m_brkpts.size()-1; i >= 0; i--) {
        if (m_brkpts[i]->temporary)
            return true;
    }
    return false;
}

Breakpoint* KDebugger::breakpointByFilePos(QString file, int lineNo)
{
    // look for exact file name match
    int i;
    for (i = m_brkpts.size()-1; i >= 0; i--) {
        if (m_brkpts[i]->lineNo == lineNo &&
            m_brkpts[i]->fileName == file)
        {
            return m_brkpts[i];
        }
    }
    // not found, so try basename
    // strip off directory part of file name
    int offset = file.findRev("/");
    if (offset < 0) {
        // that was already the basename, no need to scan the list again
        return 0;
    }
#if QT_VERSION < 200
    file.detach();
#endif
    file.remove(0, offset+1);

    for (i = m_brkpts.size()-1; i >= 0; i--) {
        if (m_brkpts[i]->lineNo == lineNo &&
            m_brkpts[i]->fileName == file)
        {
            return m_brkpts[i];
        }
    }

    // not found
    return 0;
}

void KDebugger::slotValuePopup(const QString& expr)
{
    // search the local variables for a match
    VarTree* v = m_localVariables.topLevelExprByName(expr);
    if (v == 0) {
        // not found, check watch expressions
        v = m_watchVariables.topLevelExprByName(expr);
        if (v == 0) {
            // nothing found; do nothing
            return;
        }
    }

    // construct the tip
    QString tip = v->getText() + " = ";
    if (!v->m_value.isEmpty())
    {
        tip += v->m_value;
    }
    else
    {
        // no value: we use some hint
        switch (v->m_varKind) {
        case VarTree::VKstruct:
            tip += "{...}";
            break;
        case VarTree::VKarray:
            tip += "[...]";
            break;
        default:
            tip += "???";
            break;
        }
    }
    emit valuePopup(tip);
}


#include "debugger.moc"