[JDK-8223377] Updated information - Webengine crashes when HTML contains japanese/sundanese punctuation code points

Fri May 10 20:50:30 UTC 2019

The normal submission process yielded a bug report to be evaluated, and 
it's still in the queue to be looked at. Since you provided some 
additional information, we can add it to the bug report as a comment. 
Btw, the direct URL for the bug in JBS is:

https://bugs.openjdk.java.net/browse/JDK-8223377

 From your aditional comments, it sounds as if this is some sort of 
system configuration issue. Unless there are JavaFX classes or .so files 
in your JDK (which is not supported with OpenJFX 11 or greater), I don't 
know how you would see the mismatch between the javafx.web class files 
and the jfxwebkit.so native library.

-- Kevin

On 5/10/2019 1:23 PM, Matthias Bläsing wrote:
> Hello,
>
> as the normal submission process did not yield an update for the above
> mentioned issue and this is a crasher, I try to get the information
> submitted here.
>
> As reference the JDK issue:
>
> https://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8223377
>
> Summary:
>
> I experimented with OpenJFX once again and noticed, that even simple
> programms crashed for me. I saw the crashes being introduced in maven
> release:
>
>          <dependency>
>              <groupId>org.openjfx</groupId>
>              <artifactId>javafx-controls</artifactId>
>              <version>12-ea+7</version>
>          </dependency>
>          <dependency>
>              <groupId>org.openjfx</groupId>
>              <artifactId>javafx-web</artifactId>
>              <version>12-ea+7</version>
>          </dependency>
>
> Until that version this stack trace is generated:
>
> java.lang.ArrayIndexOutOfBoundsException: Index -17 out of bounds for length 32
> 	at com.sun.prism.impl.GlyphCache.getCachedGlyph(GlyphCache.java:332)
> 	at com.sun.prism.impl.GlyphCache.render(GlyphCache.java:148)
> 	at com.sun.prism.impl.ps.BaseShaderGraphics.drawString(BaseShaderGraphics.java:2101)
> 	at com.sun.javafx.webkit.prism.WCGraphicsPrismContext$10.doPaint(WCGraphicsPrismContext.java:939)
> 	at com.sun.javafx.webkit.prism.WCGraphicsPrismContext$Composite.paint(WCGraphicsPrismContext.java:1524)
> 	at com.sun.javafx.webkit.prism.WCGraphicsPrismContext$Composite.paint(WCGraphicsPrismContext.java:1509)
> 	at com.sun.javafx.webkit.prism.WCGraphicsPrismContext.drawString(WCGraphicsPrismContext.java:951)
> 	at com.sun.webkit.graphics.GraphicsDecoder.decode(GraphicsDecoder.java:301)
> 	at com.sun.webkit.graphics.WCRenderQueue.decode(WCRenderQueue.java:92)
> 	at com.sun.webkit.WebPage.paint2GC(WebPage.java:736)
> 	at com.sun.webkit.WebPage.paint(WebPage.java:703)
> 	at com.sun.javafx.sg.prism.web.NGWebView.renderContent(NGWebView.java:95)
> 	at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2072)
> 	at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
> 	at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
> 	at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:578)
> 	at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2072)
> 	at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
> 	at com.sun.javafx.tk.quantum.ViewPainter.doPaint(ViewPainter.java:479)
> 	at com.sun.javafx.tk.quantum.ViewPainter.paintImpl(ViewPainter.java:328)
> 	at com.sun.javafx.tk.quantum.PresentingPainter.run(PresentingPainter.java:91)
> 	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
> 	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
> 	at com.sun.javafx.tk.RenderJob.run(RenderJob.java:58)
> 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
> 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
> 	at com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:125)
> 	at java.base/java.lang.Thread.run(Thread.java:834)
>
> I tried to corner the problem and noticed, that the crash is _not_
> reproducible with the java binary from jdk.java.net. The crash is also
> not reproducible with a Ubuntu Live CD with only the default-jre
> installed.
>
> Then I tried to align the live environment (does not crash) with my
> desktop system (OpenJFX crashes). And finally I found the problem.
>
> 1. Get the Xubuntu 19.04 live CD:
>     http://torrent.ubuntu.com/xubuntu/releases/disco/release/desktop/xubuntu-19.04-desktop-amd64.iso.torrent
> 2. Start the Image (Try Xubuntu) in VirtualBox
> 3. Install the default JDK (that will be 11.0.3) and maven:
>     sudo apt install default-jdk maven git
> 4. Clone the reproducer repository:
>     git clone https://github.com/matthiasblaesing/reproduce-openjfx-crash.git
> 5. Build it:
>     cd reproduce-openjfx-crash
>     mvn package
> 6. Run with:
>     java -jar target/reproduce-openjfx-crash.jar
>
> => Window with the title "Hello World!", the text "Test" and japanese/sudanese punctuation symbols are shown
> => In the console, you see, that the native libraries are loaded from resource
>
> 7. Close windows
> 8. Install openjfx JNI libraries:
>     apt install libopenjfx-jni
> 9. Run again with:
>     java -jar target/reproduce-openjfx-crash.jar
>
> => Window is briefly displayed
> => On the console a SEGFAULS is logged (and hs_err_pid... is written)
> => You can read, that the native libraries were loaded via System#loadLibrary
>
> --------------------------------------------------------------------
>
> This result also explains why the problem is not visible with the
> binaries from jdk.java.net: The java executables use different
> java.library.paths:
>
> Ubuntu:
>
> java.library.path = /usr/java/packages/lib
>          /usr/lib/x86_64-linux-gnu/jni
>          /lib/x86_64-linux-gnu
>          /usr/lib/x86_64-linux-gnu
>          /usr/lib/jni
>          /lib
>          /usr/lib
>
> OpenJDK:
>
>      java.library.path = /usr/java/packages/lib
>          /usr/lib64
>          /lib64
>          /lib
>          /usr/lib
>
> As contents of the libopenjfx-jni package is installed to
> /usr/lib/x86_64-linux-gnu/jni/, only the Ubuntu java launcher finds the
> binaries.
>
> --------------------------------------------------------------------
>
> It is not too surprising, that the native libraries and the java
> implementations are tightly coupled. For the JNA project we are faced
> with the same situation. However, there are differences:
>
> - the JNA project checks, that the native libraries are
>    of a compatible version
> - there is a system property, that lets the user choose whether
>    system libraries should be used or the bundled native libraries be
>    extracted
> - the system property was changed to default to use the bundled native
>    libraries
>
> I had a quick look at the NativeLibraryLoader and don't see a similar
> mechanism. The only work around I found was overriding the
> java.library.path, but that requires changes to the launch sequence of
> the VM.
>
>
> For a managed language, I don't think a segfault is a valid result for
> loading HTML and thus should not be just a P4. It is not uncommon to
> have the distribution libraries installed, so I expect the problem to
> be present on more systems.
>
>
> Thank you
>
> Matthias
>