Crash in "canvas" qml example during startup

[Alexander Neundorf]

On Montag, 14. März 2022 08:23:20 CET Johnny Jazeix wrote:
> Hi,
> 
> usually, crashes happened to me when the images size was not set or there
> was a division by 0.
> Maybe it's something equivalent here.


Hmm, I'm just trying to run one of the "android-ready" examples from Qt, I would expect 
that they work. It also crashes if my main() doesn't actually do anything.

Some more info:
something at least already succeeded before:

D         : Gralloc Free  w:1200, h:1920, f:0x1101, usage:0xb00, ui64Stamp:129462 line = 2376 
D         : Gralloc Free  w:1200, h:1920, f:0x1101, usage:0xb00, ui64Stamp:129513 line = 2376 
D         : Gralloc Free  w:1200, h:1920, f:0x1101, usage:0xb00, ui64Stamp:129462 line = 2376 
D ip_monitor-525: fe80::1 dev wlan0 lladdr 4c:1b:86:33:c4:1e router STALE 
I QtCore  : Start 
I Qt      : qt started

Then there are some other error messages which don't look good:

W project.exampl: Accessing hidden field Landroid/graphics/drawable/
GradientDrawable$GradientState;->mShape:I (greylist-max-p, reflection, denied) 
W System.err: java.lang.NoSuchFieldException: mShape 
0W System.err:    at java.lang.Class.getField(Class.java:1604) 
W System.err:    at 
org.qtproject.qt5.android.ExtractStyle.getGradientDrawable(ExtractStyle.java:672) 
W System.err:    at org.qtproject.qt5.android.ExtractStyle.getDrawable(ExtractStyle.java:
1039)

NullPointerExceptions also looks suspicious:

W System.err: java.lang.NullPointerException: Attempt to invoke virtual method 'float 
java.lang.reflect.Field.getFloat(java.lang.Object)' on a null object reference 
W System.err:    at 
org.qtproject.qt5.android.ExtractStyle.getRotateDrawable(ExtractStyle.java:712) 
W System.err:    at org.qtproject.qt5.android.ExtractStyle.getDrawable(ExtractStyle.java:
1043) 
W System.err:    at 
org.qtproject.qt5.android.ExtractStyle.getLayerDrawable(ExtractStyle.java:623) 
W System.err:    at org.qtproject.qt5.android.ExtractStyle.getDrawable(ExtractStyle.java:
1031) 
W System.err:    at 
org.qtproject.qt5.android.ExtractStyle.extractProgressBarInfo(ExtractStyle.java:1665)

The malloc(4GB)-call and crash happen afterward.


I'm also trying to get some logging output:

int main(int argc, char* argv[])
{
  __android_log_write(ANDROID_LOG_DEBUG, "MyTag", "******** hello log !\n");
//     QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
    QGuiApplication app(argc,argv);


but this doesn't seem to appear in logcat. Or do I have to use special options for logcat to 
see this ?

Thanks
Alex


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