Having trouble with Qt Creator Debugging

[turigeza]

Hi All,

I am having trouble with the debugger not working. It just hangs something might be wrong with my setup. I am a newbie :) so it might be trivial ...

I am on Maverick (OSX) using Qt Creator. I am trying to list a folder content. I will post all specs bellow.
Xcode 6.01 is installed.

Any help would be much appreciated. Thank you,

Geza

QtCreator info
Qt Creator 3.2.1 (opensource)
Based on Qt 5.3.2 (Clang 5.0 (Apple), 64 bit)
Built on Sep 12 2014 at 15:41:30
From revision 602746950b

main.cpp
#include <QGuiApplication>
#include <QQmlApplicationEngine>
@
int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);

QQmlApplicationEngine engine;
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));

return app.exec();

}
@

main.qml
@
import QtQuick 2.3
import QtQuick.Window 2.2
import Qt.labs.folderlistmodel 2.1

Window {
id: hello
width: 1000
height: 500
title: "Hello"
visible: true
color: "#FFFFFF"

Column {
    id: column1
    x: 0
    y: 0
    width: 200
    height: 500
    ListView {
        width: 180; height: 200
        model:  ListModel {
            ListElement {
                name: "Bill Smith"
                number: "555 3264"

            }
            ListElement {
                name: "John Brown"
                number: "555 8426"
            }
            ListElement {
                name: "Sam Wise"
                number: "555 0473"
            }
        }
        delegate: Text {
            text: name + ": " + number
        }
    }


}

Column {
    id: column2
    x: 199
    y: 0
    width: 801
    height: 500

    ListView {
        width: 200; height: 400

        model: FolderListModel {
            folder: "/Applications"
            nameFilters: ["*.qml"]
            }
        delegate:Text { text: fileName }
    }
}

}
@

[turigeza]

debugger output
sStarting debugger "LldbEngine" for ABI "x86-macos-generic-mach_o-64bit"...
dStart parameters: 'QuickProject' mode: 1
dABI: x86-macos-generic-mach_o-64bit
dLanguages: c++
dExecutable: /Users/geza/build-QuickProject-General-Debug/QuickProject.app/Contents/MacOS/QuickProject
dDirectory: /Users/geza/build-QuickProject-General-Debug/QuickProject.app/Contents/MacOS
dDebugger: /Applications/Xcode.app/Contents/Developer/usr/bin/lldb
dProject: /Users/geza/QuickProject (built: /Users/geza/build-QuickProject-General-Debug)
dQML server: 127.0.0.1:3768
dRemote: :0
dSysroot:
dDebug Source Location:
dDebugger settings:
dStationaryEditorWhileStepping: false (default: false)
dRaiseOnInterrupt: true (default: true)
dUseCodeModel: true (default: true)
dUseDebuggingHelper: true (default: true)
dCloseBuffersOnExit: false (default: false)
dBreakpointsFullPath: false (default: false)
dSwitchModeOnExit: false (default: false)
dAutoQuit: false (default: false)
dVerboseLog: false (default: false)
dLogTimeStamps: false (default: false)
dUseAlternatingRowColours: false (default: false)
dUseMessageBoxForSignals: true (default: true)
dFontSizeFollowsEditor: false (default: false)
dSourcePaths: (default: )
dSymbolPaths: (default: )
dBreakOnCrtDbgReport: false (default: false)
dBreakEvent: (default: )
dExtraDumperFile: (default: )
dAlwaysAdjustColumnWidths: true (default: true)
dAdditionalArguments: (default: )
dGdbCustomDumperCommands: (default: )
dUseAddressInBreakpointsView: false (default: false)
dUseToolTipsInBreakpointsView: true (default: true)
dUseAddressInStackView: false (default: false)
dUseToolTips: true (default: true)
dShowThreadNames: false (default: false)
dUseToolTipsInBreakpointsView: true (default: false) ***
dUseToolTipsInLocalsView: false (default: false)
dMultiInferior: false (default: false)
dWarnOnReleaseBuilds: true (default: true)
dIdentifyDebugInfoPackages: false (default: false)
dIntelFlavor: false (default: false)
dAutoEnrichParameters: true (default: true)
dWatchdogTimeout: 20 (default: 20)
dTargetAsync: false (default: false)
dUseDynamicType: true (default: true)
dAttemptQuickStart: false (default: false)
dLoadGdbDumpers1: true (default: true)
dGdbPostAttachCommands: (default: )
dGdbStartupCommands: (default: )
dBreakpointCorrection: true (default: true)
dCDB_Console: false (default: false)
dLoadGdbInit: true (default: true)
dIgnoreFirstChanceAccessViolation: false (default: false)
dAllPluginBreakpoints: true (default: true)
dAdjustBreakpointLocations: true (default: true)
dSelectedPluginBreakpoints: false (default: false)
dListSourceFiles: false (default: false)
dDisplayStringLimit: 100 (default: 100)
dEnableReverseDebugging: false (default: false)
dSkipKnownFrames: false (default: false)
dSortStructMembers: true (default: true)
dShowQtNamespace: true (default: true)
dMaximalStringLength: 10000 (default: 10000)
dAutoDerefPointers: true (default: true)
dMaximalStackDepth: 20 (default: 20)
dShowStandardNamespace: true (default: true)
dQmlInspector.FromQml: false (default: false)
dQmlInspector.ShowAppOnTop: false (default: false)
dBreakOnFatal: false (default: false)
dBreakOnWarning: false (default: false)
dShowQmlObjectTree: true (default: true)
dBreakOnAbort: false (default: false)
dSelectedPluginBreakpointsPattern: .* (default: .*)
dNoPluginBreakpoints: false (default: false)
dBreakOnCatch: false (default: false)
dBreakOnThrow: false (default: false)
dState changed from DebuggerNotReady(0) to EngineSetupRequested(1) [master]
dQUEUE: SETUP ENGINE
dCALL: SETUP ENGINE
dSTARTING LLDB -i /Applications/Qt Creator.app/Contents/Resources/debugger/lldbbridge.py /Applications/Xcode.app/Contents/Developer/usr/bin/lldb

dLldb stdout: lldbversion="lldb-320.4.124.10"@
dstate="enginesetupok"@
dNOTE: ENGINE SETUP OK
dState changed from EngineSetupRequested(1) to EngineSetupOk(3) [master]
dQUEUE: SETUP INFERIOR
dState changed from EngineSetupOk(3) to InferiorSetupRequested(4) [master]
dQUEUE: SETUP INFERIOR
dCALL: SETUP INFERIOR
<1{"cmd":"setupInferior","executable":"/Users/geza/build-QuickProject-General-Debug/QuickProject.app/Contents/MacOS/QuickProject","breakOnMain":0,"useTerminal":0,"startMode":1,"processArgs":[],"startMode":1,"attachPid":-1,"sysRoot":"","remoteChannel":"","platform":"","token":1}

dLldb stdout: state="inferiorsetupok",msg="success",exe="/Users/geza/build-QuickProject-General-Debug/QuickProject.app/Contents/MacOS/QuickProject"@
dtoken="1"@
dNOTE: INFERIOR SETUP OK
dState changed from InferiorSetupRequested(4) to InferiorSetupOk(6) [master]
dState changed from InferiorSetupOk(6) to EngineRunRequested(7) [master]
dQUEUE: RUN ENGINE
dCALL: RUN ENGINE
sRunning requested...
<2{"cmd":"runEngine","token":2}
dLldb stdout: token="2"@

dQUIT DEBUGGER REQUESTED IN STATE 7
dNOTE: ENGINE RUN FAILED
sRun failed.
dState changed from EngineRunRequested(7) to EngineRunFailed(8) [master]
dState changed from EngineRunFailed(8) to EngineShutdownRequested(20) [master]
dQUEUE: SHUTDOWN ENGINE
dQUIT DEBUGGER REQUESTED IN STATE 20
dCALL: SHUTDOWN ENGINE
dNOTE: ENGINE SHUTDOWN OK
dState changed from EngineShutdownRequested(20) to EngineShutdownOk(22) [master]
dState changed from EngineShutdownOk(22) to DebuggerFinished(23) [master]
dQUEUE: FINISH DEBUGGER
dNOTE: FINISH DEBUGGER
dHANDLE RUNCONTROL FINISHED
sDebugger finished.
dHANDLE LLDB ERROR
dLLDB PROCESS FINISHED, status 1, code 0
dNOTE: ENGINE SPONTANEOUS SHUTDOWN
dState changed BY FORCE from DebuggerFinished(23) to EngineShutdownOk(22) [master]
dState changed from EngineShutdownOk(22) to DebuggerFinished(23) [master]
dQUEUE: FINISH DEBUGGER
dNOTE: FINISH DEBUGGER

[vemod]

When it hangs: open the view "Debugger Log" and click the little button "repeat last command for debug reasons".

I guess it will be fixed soon.

[SGaist]

Hi and welcome to devnet,

Xcode 6 has brought some modification that has break the support for lldb so you might be hit by that. Have a look at the interest mailing list thread called "LLDB hangs while being launched on Mac OS X"

It might be of use

Hope it helps

[vtong]

I also encountered that issue with xcode6.
Hoping Qt release a new version to fix this.

[turigeza]

Thank you so much ! I'll try both and let you know.

[turigeza]

SGaist
I can not find the exact thread you might be referring to but the following search
http://qt-project.org/search?search=LLDB+hangs
doesn't yield much help ... or shall I say solution ; )

vemod
The method you suggest gives me the following output.
<3{"cmd":"","token":3}
dLldb stdout:
d
dWARNING="**** CAUGHT EXCEPTION: MAIN LOOP ****",
d
dLldb stdout: pid="15633"@
dstate="enginerunandinferiorrunok"@
dNOTE: ENGINE RUN AND INFERIOR RUN OK
sRunning.
dState changed from EngineRunRequested(7) to InferiorRunOk(11) [master]
dLldb stdout: event={type="1",data="0x7fc502f521b0 Event: broadcaster = 0x7fc503244030 (lldb.process), type = 0x00000001 (state-changed), data = { process = 0x7fc503244000 (pid = 15633), state = running}",msg="None",flavor="Process::ProcessEventData",state="6"}@
dstate="running"@
dNOTE: INFERIOR RUN OK - REPEATED.
dLldb stdout:
d
dWARNING="Traceback (most recent call last):
d
d File '/Applications/Qt Creator.app/Contents/Resources/debugger/lldbbridge.py', line 1703, in doit
d db.execute(convertHash(json.loads(line)))
d
d File '/Applications/Qt Creator.app/Contents/Resources/debugger/lldbbridge.py', line 1664, in execute
d getattr(self, args['cmd'])(args)
d
dAttributeError: Dumper instance has no attribute ''
d",
d
dLldb stdout: event={type="4",data="0x7fc502d922d0 Event: broadcaster = 0x7fc503244030 (lldb.process), type = 0x00000004 (stdout-available), data = { process = 0x7fc503244000 (pid = 15633), state = running}",msg="None",flavor="Process::ProcessEventData",state="6"}@
doutput={channel="stdout",data="514d4c20646562756767696e6720697320656e61626c65642e204f6e6c7920757365207468697320696e2061207361666520656e7669726f6e6d656e742e0d0a"}@
QML debugging is enabled. Only use this in a safe environment.

[turigeza]

What do you all think ... Am I attempting the impossible here ? Shall I try uninstall xcode and install and earlier version?

[vemod]

"https://bugreports.qt-project.org/browse/QTCREATORBUG-13077":https://bugreports.qt-project.org/browse/QTCREATORBUG-13077

[turigeza]

Well done guys thank you so much !

http://permalink.gmane.org/gmane.comp.lib.qt.user/13546

[freddy311082]

Sorry turigeza... I have the same trouble, I had read the http://permalink.gmane.org/gmane.comp.lib.qt.user/13546. I had found the lldbbridge.py file in this address: ~/Qt5.3.2/Qt Creator.app/Contents/Resources/debugger/lldbbridge.py

the patch say this

@
--- a/share/qtcreator/debugger/lldbbridge.py
+++ b/share/qtcreator/debugger/lldbbridge.py
<at> <at> -667,8 +667,9 <at> <at> class Dumper(DumperBase):
def runEngine(self, _):

•    self.prepare()
     s = threading.Thread(target=self.loop, args=[])
     s.start()
  

• def loop(self):

• def prepare(self):
  error = lldb.SBError()
  listener = self.debugger.GetListener()

<at> <at> -710,5 +711,7 <at> <at> class Dumper(DumperBase):
self.report('pid="%s"' % self.process.GetProcessID())
self.reportState("enginerunandinferiorrunok")

• def loop(self):
  event = lldb.SBEvent()

•    listener = self.debugger.GetListener()
     while True:
  

@

but I didn't know what to do with this part:

@<at> <at> -710,5 +711,7 <at> <at> class Dumper(DumperBase):
self.report('pid="%s"' % self.process.GetProcessID())
self.reportState("enginerunandinferiorrunok")

• def loop(self):
  event = lldb.SBEvent()

•    listener = self.debugger.GetListener()
     while True:@
  

I really didn't know what to do with this part... can you giveme some advice ?

I have OS X 10.9.5

best regards

Freddy

[turigeza]

Hi Freddy,

I have posted the wrong link sorry ... it was late last night.

The patch.
https://codereview.qt-project.org/#/c/95516/

Direct link to the new python file.
https://codereview.qt-project.org/cat/95516,2,share/qtcreator/debugger/lldbbridge.py^0

I didn't try to change the file line by line just made a backup of the original and put the new one in place.

I hope it helps.

Geza

[freddy311082]

Hi Geza...

I had overwrite it the original file for this one and when I try to debbug my code the console say:

@Debugging starts
Debugging has finished@

nothing happend and my program doesn't run ?

I'm using qt5.3.2

sory for ask again

[turigeza]

Hi,

I double checked for you. Downloaded the file from the link I gave you above (the direct download link). I went and replace my /Applications/Qt Creator.app/Contents/Resources/debugger/lldbbridge.py file and presto it works.

So it is def the file I have used. I would happily help but i am so new to this : ) I can't think of anything else ... All I can say it works for me.

Geza

[freddy311082]

Thank you my friend, now it's work for me

best regards

[turigeza]

Magic :))