Analyzed OSX Deadlock w/ AWT Applet & CALayer: Andres Colubri's Test Case, Commit 77db6a5c22cb4a53cf911b4caf57127770c70968

[1] - The AWT/Applet test case on OSX utilized offscreen CALayer, which is correct.
[2] - the GLEventListener.display(..) method calls Frame.setTitle(".."); which is correct,
      but freezes when called right after GLEventListener.init(..)

BUG on OSX/CALayer: If frame.setTitle() is issued right after initialization
the call hangs in
   at apple.awt.CWindow._setTitle(Native Method)
   at apple.awt.CWindow.setTitle(CWindow.java:765) [1.6.0_37, build 1.6.0_37-b06-434-11M3909]

Happens w/ Oracle's JRE7u9 as well!

Workaround:
 - Set 'justInitialized' flag in GLEventListener.init(..)
 - Clear 'justInitialized' flag in GLEventListener.display(..) at the end
 - Skip Frame.setTitle(..) in GLEventListener.display(..) if 'true == justInitialized'

Somebody may send a bugreport to Oracle / OpenJDK.

2 files changed, 127 insertions, 55 deletions

diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/awt/TestGLCanvasAWTActionDeadlock01AWT.java b/src/test/com/jogamp/opengl/test/junit/jogl/awt/TestGLCanvasAWTActionDeadlock01AWT.java
index fa4d4a5e2..09609dd39 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/awt/TestGLCanvasAWTActionDeadlock01AWT.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/awt/TestGLCanvasAWTActionDeadlock01AWT.java
@@ -29,7 +29,9 @@
 package com.jogamp.opengl.test.junit.jogl.awt;
 
 import javax.media.opengl.GLAutoDrawable;
+import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLEventListener;
+import javax.media.opengl.GLProfile;
 import javax.media.opengl.awt.GLCanvas;
 import com.jogamp.opengl.util.Animator;
 import com.jogamp.opengl.util.AnimatorBase;
@@ -61,23 +63,28 @@ public class TestGLCanvasAWTActionDeadlock01AWT extends UITestCase {
     GLEventListener gle2 = null;
     
     @Test
+    public void test00NoAnimator() throws InterruptedException {
+        testImpl(null, 0, false);
+    }
+    
+    @Test
     public void test01Animator() throws InterruptedException {
         testImpl(new Animator(), 0, false);
     }
     
-    // @Test
+    @Test
     public void test02FPSAnimator() throws InterruptedException {
         testImpl(new FPSAnimator(30), 0, false);
     }
     
-    // @Test
+    @Test
     public void test02FPSAnimator_RestartOnAWTEDT() throws InterruptedException {
-        testImpl(new FPSAnimator(30), 100, false);
+        testImpl(new FPSAnimator(30), 200, false);
     }
     
-    // @Test
+    @Test
     public void test02FPSAnimator_RestartOnCurrentThread() throws InterruptedException {
-        testImpl(new FPSAnimator(30), 100, true);
+        testImpl(new FPSAnimator(30), 200, true);
     }
     
     void testImpl(final AnimatorBase animator, int restartPeriod, boolean restartOnCurrentThread) throws InterruptedException {
@@ -109,8 +116,11 @@ public class TestGLCanvasAWTActionDeadlock01AWT extends UITestCase {
         });    
         
         gle1 = new GLEventListener() {
+            boolean justInitialized = true;
+            
             @Override
             public void init(GLAutoDrawable drawable) {
+                justInitialized = true;
             }
 
             @Override
@@ -119,8 +129,22 @@ public class TestGLCanvasAWTActionDeadlock01AWT extends UITestCase {
 
             @Override
             public void display(GLAutoDrawable drawable) {
-                frame1.setTitle("f "+frameCount+", fps "+animator.getLastFPS());
+                if(!justInitialized) {                    
+                    // BUG on OSX/CALayer: If frame.setTitle() is issued right after initialization
+                    // the call hangs in 
+                    //  at apple.awt.CWindow._setTitle(Native Method)
+                    //  at apple.awt.CWindow.setTitle(CWindow.java:765) [1.6.0_37, build 1.6.0_37-b06-434-11M3909]
+                    //
+                    final String msg = "f "+frameCount+", fps "+( null != animator ? animator.getLastFPS() : 0);
+                    System.err.println("About to setTitle: CT "+Thread.currentThread().getName()+", "+msg+
+                                       frame1+", displayable "+frame1.isDisplayable()+
+                                       ", valid "+frame1.isValid()+", visible "+frame1.isVisible());
+                    // Thread.dumpStack();
+                    frame1.setTitle(msg);
+                    
+                }
                 frameCount++;
+                justInitialized=false;
             }
 
             @Override
@@ -133,27 +157,37 @@ public class TestGLCanvasAWTActionDeadlock01AWT extends UITestCase {
         glCanvas.addGLEventListener(gle1);
         glCanvas.addGLEventListener(gle2);
         
-        animator.setUpdateFPSFrames(60, System.err);
-        animator.add(glCanvas);
-        animator.start();
+        if(null != animator) {
+            System.err.println("About to start Animator: CT "+Thread.currentThread().getName());
+            animator.setUpdateFPSFrames(60, System.err);
+            animator.add(glCanvas);
+            animator.start();
+        }
 
         attachGLCanvas(applet1, glCanvas, false);
         
+        System.err.println("About to setVisible.0 CT "+Thread.currentThread().getName());
         try {
             javax.swing.SwingUtilities.invokeAndWait(new Runnable() {
                 public void run() {
+                    System.err.println("About to setVisible.1.0 CT "+Thread.currentThread().getName());
                     frame1.setVisible(true);
+                    System.err.println("About to setVisible.1.X CT "+Thread.currentThread().getName());
                 }});
         } catch (Throwable t) { 
             t.printStackTrace();
             Assume.assumeNoException(t);
         }
+        System.err.println("About to setVisible.X CT "+Thread.currentThread().getName());
         
         final long sleep = 0 < restartPeriod ? restartPeriod : 100;
         long togo = durationPerTest;
         while( 0 < togo ) {
+            if(null == animator) {
+                glCanvas.display();
+            }
             if(0 < restartPeriod) {
-                glCanvas = restart(applet1, glCanvas, restartOnCurrentThread);
+                glCanvas = restart(frame1, applet1, glCanvas, restartOnCurrentThread);
             }
             
             Thread.sleep(sleep);
@@ -162,12 +196,30 @@ public class TestGLCanvasAWTActionDeadlock01AWT extends UITestCase {
         }
         
         dispose(frame1, applet1);
-        animator.stop();
+        if(null != animator) {
+            animator.stop();
+        }
         
         gle1 = null;                
         gle2 = null;
     }
     
+    int frameCount = 0;
+    
+    GLCanvas createGLCanvas() {
+        System.err.println("*** createGLCanvas.0");
+        final GLCapabilities caps = new GLCapabilities(GLProfile.getDefault());
+        // Iff using offscreen layer, use pbuffer, hence restore onscreen:=true.
+        // caps.setPBuffer(true);
+        // caps.setOnscreen(true);
+        final GLCanvas glCanvas = new GLCanvas(caps);
+        glCanvas.setBounds(0, 0, width, height);
+        Assert.assertNotNull(glCanvas);
+        System.err.println("*** createGLCanvas.X");
+        frameCount = 0;
+        return glCanvas;        
+    }
+
     void dispose(final Frame frame, final Applet applet) {
         try {
             javax.swing.SwingUtilities.invokeAndWait(new Runnable() {
@@ -181,14 +233,14 @@ public class TestGLCanvasAWTActionDeadlock01AWT extends UITestCase {
         }
     }
     
-    GLCanvas restart(final Applet frame, GLCanvas glCanvas, boolean restartOnCurrentThread) throws InterruptedException {
+    GLCanvas restart(final Frame frame, final Applet applet, GLCanvas glCanvas, boolean restartOnCurrentThread) throws InterruptedException {
         glCanvas.disposeGLEventListener(gle1, true);
         glCanvas.disposeGLEventListener(gle2, true);
-        detachGLCanvas(frame, glCanvas, restartOnCurrentThread);
+        detachGLCanvas(applet, glCanvas, restartOnCurrentThread);
                     
         glCanvas = createGLCanvas();
         
-        attachGLCanvas(frame, glCanvas, restartOnCurrentThread);
+        attachGLCanvas(applet, glCanvas, restartOnCurrentThread);
         glCanvas.addGLEventListener(gle1);
         glCanvas.addGLEventListener(gle2);
         
@@ -226,7 +278,7 @@ public class TestGLCanvasAWTActionDeadlock01AWT extends UITestCase {
             try {
                 javax.swing.SwingUtilities.invokeAndWait(new Runnable() {
                     public void run() {
-                        applet.remove(glCanvas);
+                        applet.remove(glCanvas);                        
                         applet.validate();
                     }});
             } catch (Throwable t) {
@@ -237,17 +289,6 @@ public class TestGLCanvasAWTActionDeadlock01AWT extends UITestCase {
         System.err.println("*** detachGLCanvas.X");
     }
     
-    int frameCount = 0;
-    
-    GLCanvas createGLCanvas() {
-        System.err.println("*** createGLCanvas.0");
-        final GLCanvas glCanvas = new GLCanvas();
-        glCanvas.setBounds(0, 0, width, height);
-        Assert.assertNotNull(glCanvas);
-        System.err.println("*** createGLCanvas.X");
-        return glCanvas;        
-    }
-
     public static void main(String args[]) {
         for(int i=0; i<args.length; i++) {
             if(args[i].equals("-time")) {
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/awt/TestGLCanvasAWTActionDeadlock02AWT.java b/src/test/com/jogamp/opengl/test/junit/jogl/awt/TestGLCanvasAWTActionDeadlock02AWT.java
index 7ea4a23fa..a74286232 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/awt/TestGLCanvasAWTActionDeadlock02AWT.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/awt/TestGLCanvasAWTActionDeadlock02AWT.java
@@ -43,6 +43,7 @@ import java.awt.event.MouseEvent;
 import java.awt.event.MouseMotionListener;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
+import java.lang.reflect.InvocationTargetException;
 import java.util.Timer;
 import java.util.TimerTask;
 
@@ -123,7 +124,7 @@ public class TestGLCanvasAWTActionDeadlock02AWT extends UITestCase {
       
       private int frameCount = 0;
       
-      void run() {
+      void run() throws InterruptedException, InvocationTargetException {
         // Thread loop = new Thread("Animation Thread") {
           // public void run() {        
             frameCount = 0;
@@ -133,7 +134,7 @@ public class TestGLCanvasAWTActionDeadlock02AWT extends UITestCase {
               }
               
               if (restartCanvas && restartTimeout == frameCount) {
-                // restart();
+                restart();
               }
               
               if (useAnimator) {
@@ -155,7 +156,7 @@ public class TestGLCanvasAWTActionDeadlock02AWT extends UITestCase {
         // loop.start();        
       }
     
-      void setup() {
+      void setup() throws InterruptedException, InvocationTargetException {
         if (printThreadInfo) System.out.println("Current thread at setup(): " + Thread.currentThread());
         
         millisOffset = System.currentTimeMillis();    
@@ -214,11 +215,18 @@ public class TestGLCanvasAWTActionDeadlock02AWT extends UITestCase {
         frame.add(this);
         frame.addWindowListener(new WindowAdapter() {
           public void windowClosing(WindowEvent e) {
-              dispose();
+              try {
+                  dispose();
+              } catch (Exception ex) {
+                  Assume.assumeNoException(ex);
+              }
           }
         });    
         
-        frame.setVisible(true);
+        javax.swing.SwingUtilities.invokeAndWait(new Runnable() {
+            public void run() {
+                frame.setVisible(true); // from here on all AWT mods must be done on AWT-EDT !
+            } } );
     
         // Canvas setup ----------------------------------------------------------
         
@@ -227,17 +235,21 @@ public class TestGLCanvasAWTActionDeadlock02AWT extends UITestCase {
         capabilities.setSampleBuffers(true);
         capabilities.setNumSamples(numSamples);
         capabilities.setDepthBits(24);
-        capabilities.setStencilBits(8);
+        // capabilities.setStencilBits(8); // No Stencil on OSX w/ hw-accel !
         capabilities.setAlphaBits(8);
         
         canvas = new GLCanvas(capabilities);
         canvas.setBounds(0, 0, width, height);
             
-        this.setLayout(new BorderLayout());
-        this.add(canvas, BorderLayout.CENTER);
+        javax.swing.SwingUtilities.invokeAndWait(new Runnable() {
+            public void run() {
+                MiniPApplet.this.setLayout(new BorderLayout());
+                MiniPApplet.this.add(canvas, BorderLayout.CENTER);
+                MiniPApplet.this.validate();
+            } } );
         canvas.addMouseMotionListener(this); 
         canvas.addKeyListener(this);
-            
+        
         // Setting up animation
         listener = new SimpleListener();
         canvas.addGLEventListener(listener);
@@ -248,7 +260,7 @@ public class TestGLCanvasAWTActionDeadlock02AWT extends UITestCase {
         initialized = true;    
       }
       
-      void restart() {
+      void restart() throws InterruptedException, InvocationTargetException {
         System.out.println("Restarting surface...");
         
         // Stopping animation, removing current canvas.
@@ -267,8 +279,12 @@ public class TestGLCanvasAWTActionDeadlock02AWT extends UITestCase {
         canvas.setBounds(0, 0, width, height);
         
         // Setting up animation again
-        this.setLayout(new BorderLayout());
-        this.add(canvas, BorderLayout.CENTER);
+        javax.swing.SwingUtilities.invokeAndWait(new Runnable() {
+            public void run() {
+                MiniPApplet.this.setLayout(new BorderLayout());
+                MiniPApplet.this.add(canvas, BorderLayout.CENTER);
+                MiniPApplet.this.validate();
+            } } );
         canvas.addMouseMotionListener(this);
         canvas.addKeyListener(this);
         
@@ -284,7 +300,7 @@ public class TestGLCanvasAWTActionDeadlock02AWT extends UITestCase {
         System.out.println("Done");
       }
       
-      void dispose() {
+      void dispose() throws InterruptedException, InvocationTargetException {
         if( null == frame ) {
             return;
         }
@@ -302,24 +318,28 @@ public class TestGLCanvasAWTActionDeadlock02AWT extends UITestCase {
             frame.dispose();
             frame = null;
         } else {
-            try {
-                javax.swing.SwingUtilities.invokeAndWait(new Runnable() {
-                    public void run() {
-                        MiniPApplet.this.remove(canvas);
-                        frame.remove(MiniPApplet.this);
-                        frame.validate();
-                        frame.dispose();
-                        frame = null;
-                    }});
-            } catch (Throwable t) {
-                t.printStackTrace();
-                Assume.assumeNoException(t);
-            }
+            javax.swing.SwingUtilities.invokeAndWait(new Runnable() {
+                public void run() {
+                    MiniPApplet.this.remove(canvas);
+                    frame.remove(MiniPApplet.this);
+                    frame.validate();
+                    frame.dispose();
+                    frame = null;
+                }});
         }
       }
       
+      boolean justInitialized = true;
+      
       void draw(GL2 gl) {
-        frame.setTitle("frame " + frameCount);
+        if(!justInitialized) {                    
+            // BUG on OSX/CALayer: If frame.setTitle() is issued right after initialization
+            // the call hangs in 
+            //  at apple.awt.CWindow._setTitle(Native Method)
+            //  at apple.awt.CWindow.setTitle(CWindow.java:765) [1.6.0_37, build 1.6.0_37-b06-434-11M3909]
+            //
+            frame.setTitle("frame " + frameCount);
+        }
         
         if (printThreadInfo) System.out.println("Current thread at draw(): " + Thread.currentThread());      
         
@@ -336,6 +356,10 @@ public class TestGLCanvasAWTActionDeadlock02AWT extends UITestCase {
           int[] temp = { 0 };
           gl.glGetIntegerv(GL2.GL_MAX_SAMPLES, temp, 0);
           System.out.println("Maximum number of samples supported by the hardware: " + temp[0]);
+          System.out.println("Frame: "+frame);
+          System.out.println("Applet: "+MiniPApplet.this);
+          System.out.println("GLCanvas: "+canvas);
+          System.out.println("GLDrawable: "+canvas.getDelegatedDrawable());
         }
         
         if (currentSamples == -1) {
@@ -418,13 +442,16 @@ public class TestGLCanvasAWTActionDeadlock02AWT extends UITestCase {
         @Override
         public void display(GLAutoDrawable drawable) {
           draw(drawable.getGL().getGL2());
+          justInitialized = false;
         }
     
         @Override
         public void dispose(GLAutoDrawable drawable) { }
     
         @Override
-        public void init(GLAutoDrawable drawable) { }
+        public void init(GLAutoDrawable drawable) { 
+            justInitialized = true;
+        }
     
         @Override
         public void reshape(GLAutoDrawable drawable, int x, int y, int w, int h) { }    
@@ -588,7 +615,11 @@ public class TestGLCanvasAWTActionDeadlock02AWT extends UITestCase {
       throw new RuntimeException(e);
     }    
     if (mini != null) {
-      mini.run();
+      try {
+          mini.run();
+      } catch (Exception ex) {
+          Assume.assumeNoException(ex);
+      }
     }
   }