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List:       openjdk-openjfx-dev
Subject:    Re: Warnings when running with -Xcheck:jni
From:       Kevin Rushforth <kevin.rushforth () oracle ! com>
Date:       2016-09-21 18:17:56
Message-ID: 57E2CED4.4050208 () oracle ! com
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We do care at least about the first one (pending exceptions), and we 
should fix them. Can you file a bug?

As for the 'exceeds capacity' warning for JNI local refs we haven't in 
general cared about these (I don't know of any VM for which this would 
cause a problem), but we still might want to see if we can do something 
to silence these warnings.

Thanks.

-- Kevin


Scott Palmer wrote:
> I noticed several warnings coming from javaFX when I ran my app with
> -X:check:jni
>
> Is that something worth filing an issue over,or is it basically a known
> thing and we don't particularly care?
>
> E.g.:
>
> WARNING in native method: JNI call made without checking exceptions when
> required to from CallStaticObjectMethodV
>         at com.sun.glass.ui.win.WinDnDClipboard.push(Native Method)
>         at
> com.sun.glass.ui.win.WinSystemClipboard.pushToSystem(WinSystemClipboard.java:234)
>         at com.sun.glass.ui.SystemClipboard.flush(SystemClipboard.java:51)
>         at
> com.sun.glass.ui.ClipboardAssistance.flush(ClipboardAssistance.java:59)
>         at
> com.sun.javafx.tk.quantum.QuantumClipboard.flush(QuantumClipboard.java:274)
>         at
> com.sun.javafx.tk.quantum.QuantumToolkit.startDrag(QuantumToolkit.java:1224)
>         at
> javafx.scene.Scene$DnDGesture.dragDetectedProcessed(Scene.java:2953)
>
>
>
> WARNING: JNI local refs: zu, exceeds capacity: zu
>         at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
>         at
> com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
>         at
> com.sun.glass.ui.win.WinApplication$$Lambda$57/665296081.run(Unknown Source)
>         at java.lang.Thread.run(Unknown Source)
> WARNING in native method: JNI call made without checking exceptions when
> required to from CallStaticObjectMethodV
>         at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
>         at
> com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
>         at
> com.sun.glass.ui.win.WinApplication$$Lambda$57/665296081.run(Unknown Source)
>         at java.lang.Thread.run(Unknown Source)
>
> Regards,
>
> Scott
>   
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