RFR: 8039432 demo/jvmti/mtrace/TraceJFrame.java can't connect to X11

[Markus Grönlund]

Looks good Staffan.

Unfortunately I can only do (r)eview.

/Markus

-----Original Message-----
From: Staffan Larsen 
Sent: den 25 april 2014 08:19
To: serviceability-dev at openjdk.java.net serviceability-dev at openjdk.java.net
Subject: Re: RFR: 8039432 demo/jvmti/mtrace/TraceJFrame.java can't connect to X11

Can I have a Review of this small change, please?

/Staffan

On 8 apr 2014, at 11:04, Staffan Larsen <staffan.larsen at oracle.com> wrote:

> This test causes exceptions that looks like this:
> 
> java.awt.AWTError: Can't connect to X11 window server using 'REDACTED:503' as the value of the DISPLAY variable.
> 	at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
> 	at sun.awt.X11GraphicsEnvironment.access$200(X11GraphicsEnvironment.java:65)
> 	at sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java:115)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:74)
> 	at java.lang.Class.forName0(Native Method)
> 	at java.lang.Class.forName(Class.java:259)
> 	at java.awt.GraphicsEnvironment.createGE(GraphicsEnvironment.java:102)
> 	at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:81)
> 	at TraceJFrame.main(TraceJFrame.java:39)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:484)
> 	at com.sun.javatest.regtest.MainAction$SameVMRunnable.run(MainAction.java:754)
> 	at java.lang.Thread.run(Thread.java:744)
> 
> 
> The fix seems to be to not call GraphicsEnvironment.getLocalGraphicsEnvironement().isHeadlessInstance() but GraphicsEnvironment.isHeadless() directly.
> 
> Please review the fix below,
> 
> Thanks,
> /Staffan
> 
> 
> 
> diff --git a/test/demo/jvmti/mtrace/TraceJFrame.java b/test/demo/jvmti/mtrace/TraceJFrame.java
> --- a/test/demo/jvmti/mtrace/TraceJFrame.java
> +++ b/test/demo/jvmti/mtrace/TraceJFrame.java
> @@ -36,7 +36,7 @@
> 
> public class TraceJFrame {
>     public static void main(String args[]) throws Exception {
> -        if (GraphicsEnvironment.getLocalGraphicsEnvironment().isHeadlessInstance()) {
> +        if (GraphicsEnvironment.isHeadless()) {
>             System.out.println("JFrame test was skipped due to headless mode");
>         } else {
>             DemoRun demo;