Fix NEWT EDTUtil Deadlock on EDTUtil.start()

DisplayImpl.runOnEDTIfAvail(..) issues EDTUtil.start()
while holding it's object-lock - if the EDT is not running,
then invokes the given task.

EDTUtil.start() impl. holds it's own edt-lock
while starting, then releases it's edt-lock while issuing a null-task.

If another thread injects a blocking task right in-between
which also acquires the display's object-lock it deadlocks.

Simply remove issuing the null-task, so EDTUtil.start()
can return immediatly (releasing edt-lock)
and allowing DisplayImpl.runOnEDTIfAvail(..)
also to release it's object-lock.

The other threads task then can be executed,
where the 'starting task' would come second - which is OK,
even though a rare occasion.

Above situation was triggered via AWT/NEWT reparenting w/ forced recreation
via TestParenting01dAWT.

+++

The null-task at EDTUtil.start() was remaining code to ensure
that the EDT completed starting, which is redundant.

1 files changed, 3 insertions, 2 deletions

diff --git a/make/scripts/tests.sh b/make/scripts/tests.sh
index a16f87473..3382e0edd 100644
--- a/make/scripts/tests.sh
+++ b/make/scripts/tests.sh
@@ -204,6 +204,7 @@ function jrun() {
     #D_ARGS="-Dnewt.debug.Screen -Dnewt.debug.EDT -Djogamp.debug.Lock"
     #D_ARGS="-Djogl.debug.GLContext -Dnativewindow.debug.GraphicsConfiguration"
     #D_ARGS="-Dnewt.debug.EDT"
+    D_ARGS="-Dnewt.debug.Window -Dnewt.debug.EDT"
     #D_ARGS="-Dnewt.debug.Window -Dnewt.debug.Display -Dnewt.debug.EDT -Djogl.debug.GLContext"
     #D_ARGS="-Dnewt.debug.Window -Djogl.debug.Animator -Dnewt.debug.Screen"
     #D_ARGS="-Dnativewindow.debug.JAWT -Dnewt.debug.Window -Djogl.debug.GLJPanel -Djogl.debug.GLCanvas"
@@ -492,7 +493,7 @@ function testawtswt() {
 #testnoawt com.jogamp.opengl.test.junit.jogl.acore.TestX11DefaultDisplay $*
 #testawt com.jogamp.opengl.test.junit.jogl.acore.TestOffscreenLayer01GLCanvasAWT $*
 #testawt com.jogamp.opengl.test.junit.jogl.acore.TestOffscreenLayer02NewtCanvasAWT $*
-testawt com.jogamp.opengl.test.junit.jogl.acore.TestAddRemove01GLCanvasSwingAWT $*
+#testawt com.jogamp.opengl.test.junit.jogl.acore.TestAddRemove01GLCanvasSwingAWT $*
 #testawt com.jogamp.opengl.test.junit.jogl.acore.TestAddRemove02GLWindowNewtCanvasAWT $*
 #testawt com.jogamp.opengl.test.junit.jogl.acore.TestAddRemove03GLWindowNEWT $*
 
@@ -714,7 +715,7 @@ testawt com.jogamp.opengl.test.junit.jogl.acore.TestAddRemove01GLCanvasSwingAWT
 #testawt com.jogamp.opengl.test.junit.newt.parenting.TestParenting01aAWT $*
 #testawt com.jogamp.opengl.test.junit.newt.parenting.TestParenting01bAWT $*
 #testawt com.jogamp.opengl.test.junit.newt.parenting.TestParenting01cAWT $*
-#testawt com.jogamp.opengl.test.junit.newt.parenting.TestParenting01dAWT $*
+testawt com.jogamp.opengl.test.junit.newt.parenting.TestParenting01dAWT $*
 #testawt com.jogamp.opengl.test.junit.newt.parenting.TestParenting02AWT $*
 #testawt com.jogamp.opengl.test.junit.newt.parenting.TestParenting03AWT $*
 #testawt com.jogamp.opengl.test.junit.newt.parenting.TestParenting04AWT $*