[commit-cp] [bugs #9484] JamVM/Classpath crashes with image loading programs

[Michael Koch]

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It relates to:
                bugs #9484, project classpath

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 LATEST MODIFICATIONS of bugs #9484:
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               Posted by: Michael Koch <mkoch>
               Posted on: 2005-01-12 06:53 (GMT)
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                Category:                    None -> classpath              

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Follow-up Comment:
Roman, is this fixed with latest classpath from CVS ? Much things changed
lately, we use only one thread for AWT and gtk-peer now and the
GdkPixbufDecoder got improved a lot when the patch to make it be used from
ImageIO too.



A concrete testcase would be nice too.

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 OVERVIEW of bugs #9484:
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URL:
  <http://savannah.gnu.org/bugs/?func=detailitem&item_id=9484>

                 Summary: JamVM/Classpath crashes with image loading programs
                 Project: classpath
            Submitted by: rabbit78
            Submitted on: Mon 28.06.2004 um 20:49
                Category: classpath
                Severity: 5 - Average
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
        Platform Version: None

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I found a strange segfault issue in programs that try to load/display images
(GIF/JPEG).



Mark and I have located the segfault to occur in

native/jni/gtk-peer/gnu_java_awt_peer_gtk_GdkPixbufDecoder.c Line 226. Here
is gdk_env used (which probably should be env instead). The real problem
seems to be, that GTKToolkit is not yet initialized properly.



The following workaround seems to work though:



--- gnu/java/awt/peer/gtk/GdkPixbufDecoder.java 26 Jun 2004 16:06:47 -0000   
 1.5

+++ gnu/java/awt/peer/gtk/GdkPixbufDecoder.java 28 Jun 2004 20:34:49 -0000

@@ -57,6 +57,8 @@

         System.loadLibrary("gtkpeer");

       }

     initStaticState ();

+    java.awt.Toolkit.getDefaultToolkit();

+    try { Thread.sleep(500); } catch (InterruptedException ignored) { }

   }

   native static void initStaticState ();

   private final int native_state = GtkGenericPeer.getUniqueInteger ();



this means, if we wait long enough for GTKToolkit to initialize, the segfault
does not occur.



Any ideas how to fix this? Maybe I should add that I tried that with JamVM
1.1.4



/Roman



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Follow-up Comments:


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Date: Mit 12.01.2005 um 06:53       By: Michael Koch <mkoch>
Roman, is this fixed with latest classpath from CVS ? Much things changed
lately, we use only one thread for AWT and gtk-peer now and the
GdkPixbufDecoder got improved a lot when the patch to make it be used from
ImageIO too.



A concrete testcase would be nice too.

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Date: Don 29.07.2004 um 21:03       By: Mark Wielaard <mark>
This bug is now also tracked in GCC AWT bugzilla as

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16824








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