[SailfishDevel] Boosted process (pid=721) was terminated due to signal 11

christopher.lamb at thurweb.ch christopher.lamb at thurweb.ch
Sun Dec 29 13:41:29 UTC 2013


Ciao Luciano

Thanks for the ideas. I agree this is most likely down to a missing  
"real gps" on the emulator. If that is the case then it would be  
fantastic if the emulator shipped with a GPS emulator (like the one on  
the Nokia simulator).

My constructor now looks like this:
SatInfoSource::SatInfoSource(QObject *parent) :
     QObject(parent),
      
myGeoSatelliteInfoSource(QGeoSatelliteInfoSource::createDefaultSource(this)),
     _satsInUse(0),
     _satsInView(0)
{
     if (myGeoSatelliteInfoSource) {
             qDebug() << "position info source available";
             connect(myGeoSatelliteInfoSource,  
SIGNAL(satellitesInViewUpdated(const QList<QGeoSatelliteInfo> &)),  
this, SLOT(onSatsInViewUpdated(const QList<QGeoSatelliteInfo> &)));
             connect(myGeoSatelliteInfoSource,  
SIGNAL(satellitesInUseUpdated(const QList<QGeoSatelliteInfo> &)),  
this, SLOT(onSatsInUseUpdated(const QList<QGeoSatelliteInfo> &)));
         }
     else {
             qDebug() << "No position info source available";
     }
}

However I still get the crash.

One thing that I have noticed, I am using QGeoSatelliteInfoSource,  
where as your code uses QGeoPositionInfoSource. (You may need to read  
that twice to see the difference 8-) ). I wonder if this is a change  
from Qt4 to Qt5? I will do a bit of googling and search for examples  
on my host.

1000 grazie

Chis

p.s. according to FedEx my phone has now made it via Charles de Gaulle  
to Basel, and should be delivered to Zurich tomorrow, so there is a  
chance that I can try this on real hardware before the end of the year  
... touch wood.

Zitat von "Luciano Montanaro" <mikelima at gmail.com>:

> I had crashes as well...
>
> My code looks similar to yours, and I experienced the crash as well
> (in the emulator, I suspected because there is no GPS on it, but...)
>
> I found out that I needed to check for the positionInfoSource being valid:
>
> Relevant snippets here:
>
> StationListProxyModel::StationListProxyModel(QObject *parent) :
>     QSortFilterProxyModel(parent),
>     positionInfoSource(QGeoPositionInfoSource::createDefaultSource(this)),
>     m_here(44.5, 9.0),
>     m_filterRecentOnly(false)
> {
>
>    ...
>
>     if (positionInfoSource) {
>         qDebug() << "position info source available";
>         connect(positionInfoSource,  
> SIGNAL(positionUpdated(QGeoPositionInfo)),
>                 SLOT(updatePosition(QGeoPositionInfo)));
>         positionInfoSource->setUpdateInterval(5000);
>     } else {
>         qDebug() << "No position info source available";
>     }
>
>  ...
>
> }
>
> On Sun, Dec 29, 2013 at 11:02 AM,  <christopher.lamb at thurweb.ch> wrote:
>> Curiouser and curiouser. Today the app still exits on GPS Startup, but the
>> Signal 11 error is not being reported, even though this was repeatedly the
>> case last night.
>>
>> In the meantime I have created a throwaway demo SatInfoSourceDemo
>> illustrating the problem. (Basically the standard Sailfish template, +
>> satinfosource.h and .cpp)
>>
>> The app exits as soon as satInfoSource.startUpdates(); is called. (In this
>> demo from the Pulley Menu on FirstPage.qml
>>
>> I am guessing the problem is either in my satinfocource plugin, or more
>> likely in the Qt5Positioning Library this is calling. The Harmattan
>> equivalent of htis code works on a real N9.
>>
>> The code of the Throwaway demo is pasted below.
>>
>> Thanks
>>
>> Chris
>>
>>
>> yaml
>> PkgBR: qt5-qtpositioning-devel
>> Requires: qt5-qtpositioning
>>
>>
>> //start satinfosource.h
>> #ifndef SATINFOSOURCE_H
>> #define SATINFOSOURCE_H
>>
>> #include <QObject>
>>
>> #include <QtPositioning/QGeoSatelliteInfoSource>
>>
>> class SatInfoSource : public QObject
>> {
>>     Q_OBJECT
>>     Q_PROPERTY(int satsInView READ satsInView NOTIFY
>> satellitesInViewChanged)
>>     Q_PROPERTY(int satsInUse READ satsInUse NOTIFY satellitesInUseChanged)
>>
>>
>> public:
>>     explicit SatInfoSource(QObject *parent = 0);
>>     ~SatInfoSource();
>>
>>     Q_INVOKABLE void startUpdates();
>>     Q_INVOKABLE void stopUpdates();
>>
>>     int satsInView() const;
>>     int satsInUse() const;
>>
>> signals:
>>     void satellitesInViewChanged(const int &satsInView);
>>     void satellitesInUseChanged(const int &satsInUse);
>>
>>
>> private slots:
>>     void onSatsInViewUpdated(const QList<QGeoSatelliteInfo> &list);
>>     void onSatsInUseUpdated(const QList<QGeoSatelliteInfo> &list);
>>
>> private:
>>      QGeoSatelliteInfoSource *myGeoSatelliteInfoSource;
>>      int _satsInUse;
>>      int _satsInView;
>>
>> };
>>
>> #endif // SATINFOSOURCE_H
>> //end satinfosource.h
>>
>> //start satinfosource.cpp
>> #include "satinfosource.h"
>> #include <QDebug>
>>
>> SatInfoSource::SatInfoSource(QObject *parent) :
>>     QObject(parent), _satsInUse(0), _satsInView(0)
>> {
>>     myGeoSatelliteInfoSource =
>> QGeoSatelliteInfoSource::createDefaultSource(0);
>>     connect(myGeoSatelliteInfoSource, SIGNAL(satellitesInViewUpdated(const
>> QList<QGeoSatelliteInfo> &)), this, SLOT(onSatsInViewUpdated(const
>> QList<QGeoSatelliteInfo> &)));
>>     connect(myGeoSatelliteInfoSource, SIGNAL(satellitesInUseUpdated(const
>> QList<QGeoSatelliteInfo> &)), this, SLOT(onSatsInUseUpdated(const
>> QList<QGeoSatelliteInfo> &)));
>> }
>>
>> SatInfoSource::~SatInfoSource()
>> {
>> }
>>
>> void SatInfoSource::startUpdates() {
>>     myGeoSatelliteInfoSource->startUpdates();
>> }
>>
>> void SatInfoSource::stopUpdates() {
>>     myGeoSatelliteInfoSource->stopUpdates();
>> }
>>
>> int SatInfoSource::satsInView() const
>> {
>>     return _satsInView;
>> }
>>
>> int SatInfoSource::satsInUse() const
>> {
>>     return _satsInUse;
>> }
>>
>> void SatInfoSource::onSatsInViewUpdated(const QList<QGeoSatelliteInfo>
>> &list) {
>>     int newInView = list.count();
>>     if (newInView != _satsInView) {
>>         qDebug() << "satInfoSource.cpp: onSatsinViewUpdated: " <<
>> QString::number(newInView, 'g', 2);
>>         _satsInView = newInView;
>>         emit satellitesInViewChanged(newInView);
>>     }
>>
>> }
>>
>> void SatInfoSource::onSatsInUseUpdated(const QList<QGeoSatelliteInfo> &list)
>> {
>>     int newInUse = list.count();
>>     if (newInUse != _satsInUse) {
>>         qDebug() << "satInfoSource.cpp: onSatsinUseUpdated: " <<
>> QString::number(newInUse, 'g', 2);
>>         _satsInUse = newInUse;
>>         emit satellitesInUseChanged(newInUse);
>>     }
>> }
>> //end satinfosource.cpp
>>
>> //start SatInfoSourceDemo.qml
>> import QtQuick 2.0
>> import Sailfish.Silica 1.0
>> import "pages"
>>
>> ApplicationWindow
>> {
>>     initialPage: Component { FirstPage { } }
>>     cover: Qt.resolvedUrl("cover/CoverPage.qml")
>> }
>> //end SatInfoSourceDemo.qml
>>
>>
>> //start FirstPage.qml
>> import QtQuick 2.0
>> import Sailfish.Silica 1.0
>> import SatInfoSource 1.0 //for info about satellites (in view, in use)
>>
>> Page {
>>     id: page
>>
>>     SatInfoSource {
>>         id: satInfoSource
>>
>>         onSatellitesInUseChanged: {
>>             console.log("GPSBackEnd: SatellitesInUseChanged! " + satsInUse +
>> "; " + thisGPSBackEnd.satsInUse);
>>         }
>>         onSatellitesInViewChanged: {
>>             console.log("GPSBackEnd: SatellitesInViewChanged! " + satsInView
>> + "; " + thisGPSBackEnd.satsInView);
>>         }
>>     }
>>
>>     SilicaFlickable {
>>         anchors.fill: parent
>>         PullDownMenu {
>>             MenuItem {
>>                 text: "Start SatInfoSource"
>>                 onClicked: {
>>                     console.log("turning GPS on")
>>                     satInfoSource.startUpdates();
>>                 }
>>             }
>>         }
>>     }
>> }
>> //end FirstPage.qml
>>
>> //start SatInfoSourceDemo.cpp
>> #ifdef QT_QML_DEBUG
>> #include <QtQuick>
>> #endif
>>
>> #include <sailfishapp.h>
>> #include "satinfosource.h"
>>
>> int main(int argc, char *argv[])
>> {
>>     qmlRegisterType<SatInfoSource>("SatInfoSource",1,0,"SatInfoSource");
>>     return SailfishApp::main(argc, argv);
>> }
>> //end SatInfoSourceDemo.cpp
>>
>> //start SatInfoSourceDemo.pro
>> TARGET = SatInfoSourceDemo
>>
>> CONFIG += sailfishapp
>>
>> QT += positioning
>>
>> SOURCES += src/SatInfoSourceDemo.cpp \
>>     src/satinfosource.cpp
>>
>> HEADERS += \
>>     satinfosource.h
>>
>> OTHER_FILES += qml/SatInfoSourceDemo.qml \
>>     qml/cover/CoverPage.qml \
>>     qml/pages/FirstPage.qml \
>>     rpm/SatInfoSourceDemo.spec \
>>     rpm/SatInfoSourceDemo.yaml \
>>     SatInfoSourceDemo.desktop
>> //end SatInfoSourceDemo.pro
>>
>>
>>
>>
>> Zitat von "Andrey Kozhevnikov" <coderusinbox at gmail.com>:
>>
>>
>>> use gdb, bro 8)
>>>
>>> On 28.12.2013 22:45, christopher.lamb at thurweb.ch wrote:
>>>>
>>>> Hi All
>>>>
>>>> My application quits unexpectedly during startup, apparently due to
>>>> "signal 11".
>>>>
>>>> This seems to be caused by turning the GPS on, as the error occurs
>>>> immediately after the app does that.
>>>>
>>>> I experience this on the Emulator, so it maybe down to the Emulator not
>>>> having a real GPS. (my Jolla phone is currently in transit between Vantaa
>>>> and Zurich according to Fedex).
>>>>
>>>> I will create a throwaway demo with just GPS to prove / disprove if the
>>>> error is caused by GPS activate (or just bad timing).
>>>>
>>>> Googling for Signal 11 has revealed little. I have come across some
>>>> references to this error on Android related to memory leaks.
>>>>
>>>> journalctl output is below:
>>>>
>>>>
>>>> Chris
>>>>
>>>>
>>>> Dec 28 18:22:57 SailfishEmul landed25_QT5[721]: [D] onStatusChanged:59 -
>>>> MainPage: turning GPS on ...
>>>> Dec 28 18:22:57 SailfishEmul landed25_QT5[721]: [D] onGPS:36 - turning
>>>> GPS on
>>>> Dec 28 18:22:57 SailfishEmul mapplauncherd[594]: Boosted process
>>>> (pid=721) was terminated due to signal 11
>>>> Dec 28 18:22:57 SailfishEmul invoker[751]: error: Can't send signal 11 to
>>>> application [721]: No such process
>>>>
>>>> _______________________________________________
>>>> SailfishOS.org Devel mailing list
>>>
>>>
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>>
>>
>>
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>
>
>
> --
> Luciano Montanaro
>
> Anyone who is capable of getting themselves made President should on
> no account be allowed to do the job. -- Douglas Adams
> _______________________________________________
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