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" <coderusin...@gmail.com>:
use gdb, bro 8)
On 28.12.2013 22:45, christopher.l...@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
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