8081485: EDT auto shutdown is broken in case of new event queue usage

Reviewed-by: serb, alexp

src/share/classes/java/awt/EventQueue.java

@@ -896,11 +896,13 @@ public class EventQueue {
                 }
             }
 
-            // Wake up EDT waiting in getNextEvent(), so it can
-            // pick up a new EventQueue. Post the waking event before
-            // topQueue.nextQueue is assigned, otherwise the event would
-            // go newEventQueue
-            topQueue.postEventPrivate(new InvocationEvent(topQueue, dummyRunnable));
+            if (topQueue.dispatchThread != null) {
+                // Wake up EDT waiting in getNextEvent(), so it can
+                // pick up a new EventQueue. Post the waking event before
+                // topQueue.nextQueue is assigned, otherwise the event would
+                // go newEventQueue
+                topQueue.postEventPrivate(new InvocationEvent(topQueue, dummyRunnable));
+            }
 
             newEventQueue.previousQueue = topQueue;
             topQueue.nextQueue = newEventQueue;

test/java/awt/Toolkit/AutoShutdown/EventQueuePush/EventQueuePushAutoshutdown.java

+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+  test
+  @bug        8081485
+  @summary    tests that a program terminates automatically after EventQueue.push()
+  @author     Anton Nashatyrev : area=toolkit
+*/
+
+import java.awt.*;
+
+public class EventQueuePushAutoshutdown implements Runnable {
+    private volatile int status = 2;
+
+    public EventQueuePushAutoshutdown() throws Exception {
+        Runtime.getRuntime().addShutdownHook(new Thread(this));
+        Thread thread = new Thread() {
+            @Override
+            public void run() {
+                status = 0;
+                try {
+                    Thread.sleep(10000);
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                } finally {
+                    status = 1;
+                    System.exit(status);
+                }
+            }
+        };
+        thread.setDaemon(true);
+        thread.start();
+
+        System.setProperty("java.awt.headless", "true");
+        final EventQueue systemQueue = Toolkit.getDefaultToolkit().getSystemEventQueue();
+        systemQueue.push(new EventQueue());
+        EventQueue.invokeAndWait(new Runnable() {
+            @Override
+            public void run() {
+                System.out.println("Activated EDT");
+            }
+        });
+        System.out.println("After EDT activation");
+    }
+
+    public static void main(String[] args) throws Exception  {
+        new EventQueuePushAutoshutdown();
+    }
+
+    @Override
+    public void run() {
+        Runtime.getRuntime().halt(status);
+    }
+}

test/java/awt/Toolkit/AutoShutdown/EventQueuePush/EventQueuePushAutoshutdown.sh

+#!/bin/ksh -p
+
+#
+# Copyright (c) 20015, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+#
+#   @test       EventQueuePushAutoshutdown.sh
+#   @bug        8081485
+#   @summary    tests that a program terminates automatically
+#               after EventQueue.push()
+#   @author     Anton Nashatyrev : area=toolkit
+#
+#   @compile EventQueuePushAutoshutdown.java
+#   @run shell EventQueuePushAutoshutdown.sh
+
+
+# Beginning of subroutines:
+status=1
+
+#Call this from anywhere to fail the test with an error message
+# usage: fail "reason why the test failed"
+fail() 
+ { echo "The test failed :-("
+   echo "$*" 1>&2
+   echo "exit status was $status"
+   exit $status
+ } #end of fail()
+
+#Call this from anywhere to pass the test with a message
+# usage: pass "reason why the test passed if applicable"
+pass() 
+ { echo "The test passed!!!"
+   echo "$*" 1>&2
+   exit 0
+ } #end of pass()
+
+# end of subroutines
+
+
+# The beginning of the script proper
+OS=`uname -s`
+case "$OS" in
+   SunOS | Linux | Darwin | CYGWIN* )
+      FILESEP="/"
+      ;;
+
+   Windows_95 | Windows_98 |  Windows_NT | Windows_ME )
+      FILESEP="\\"
+      ;;
+
+   # catch all other OSs
+   * )
+      echo "Unrecognized system!  $OS"
+      fail "Unrecognized system!  $OS"
+      ;;
+esac
+
+
+# Want this test to run standalone as well as in the harness, so do the 
+#  following to copy the test's directory into the harness's scratch directory 
+#  and set all appropriate variables:
+
+if [ -z "${TESTJAVA}" ] ; then
+   # TESTJAVA is not set, so the test is running stand-alone.
+   # TESTJAVA holds the path to the root directory of the build of the JDK
+   # to be tested.  That is, any java files run explicitly in this shell
+   # should use TESTJAVA in the path to the java interpreter.
+   # So, we'll set this to the JDK spec'd on the command line.  If none
+   # is given on the command line, tell the user that and use a cheesy
+   # default.
+   # THIS IS THE JDK BEING TESTED.
+   if [ -n "$1" ] ;
+      then TESTJAVA=$1
+      else fail "no JDK specified on command line!"
+   fi
+   TESTSRC=.
+   TESTCLASSES=.
+   STANDALONE=1;
+fi
+echo "JDK under test is: $TESTJAVA"
+
+#Deal with .class files:
+if [ -n "${STANDALONE}" ] ; 
+   then 
+   #if standalone, remind user to cd to dir. containing test before running it
+   echo "Just a reminder: cd to the dir containing this test when running it"
+   # then compile all .java files (if there are any) into .class files
+   if [ -a *.java ] ; 
+      then echo "Reminder, this test should be in its own directory with all"
+      echo "supporting files it needs in the directory with it."
+      ${TESTJAVA}/bin/javac ./*.java ; 
+   fi
+   # else in harness so copy all the class files from where jtreg put them
+   # over to the scratch directory this test is running in. 
+   else cp ${TESTCLASSES}/*.class . ;
+fi
+
+#if in test harness, then copy the entire directory that the test is in over 
+# to the scratch directory.  This catches any support files needed by the test.
+if [ -z "${STANDALONE}" ] ; 
+   then cp ${TESTSRC}/* . 
+fi
+
+#Just before executing anything, make sure it has executable permission!
+chmod 777 ./*
+
+###############  YOUR TEST CODE HERE!!!!!!!  #############
+
+#All files required for the test should be in the same directory with
+# this file.  If converting a standalone test to run with the harness,
+# as long as all files are in the same directory and it returns 0 for
+# pass, you should be able to cut and paste it into here and it will
+# run with the test harness.
+
+${TESTJAVA}/bin/java EventQueuePushAutoshutdown
+
+###############  END YOUR TEST CODE !!!!! ############
+#Be sure the last command executed above this line returns 0 for success,
+# something non-zero for failure.
+status=$?
+
+# pass or fail the test based on status of the command
+case "$status" in
+   0 )
+      pass ""
+      ;;
+
+   1 )
+      fail "The program didn't automatically shut down"
+      ;;
+
+   * )
+      fail "The program terminated unexpectedly!"
+      ;;
+esac
+
+#For additional examples of how to write platform independent KSH scripts,
+# see the jtreg file itself.  It is a KSH script for both Solaris and Win32
+