Backport 44cff9d6abab5df086e89df16f8b63c48cd33c7b

Author: duke

src/java.desktop/windows/native/libawt/windows/awt_Window.cpp

@@ -2498,32 +2498,22 @@ jint AwtWindow::_GetScreenImOn(void *param)
 
     jobject self = (jobject)param;
 
-    // It's entirely possible that our native resources have been destroyed
-    // before our java peer - if we're dispose()d, for instance.
-    // Alert caller w/ IllegalComponentStateException.
-    if (self == NULL) {
-        JNU_ThrowByName(env, "java/awt/IllegalComponentStateException",
-                        "Peer null in JNI");
-        return 0;
-    }
-    PDATA pData = JNI_GET_PDATA(self);
-    if (pData == NULL) {
-        JNU_ThrowByName(env, "java/awt/IllegalComponentStateException",
-                        "Native resources unavailable");
-        env->DeleteGlobalRef(self);
-        return 0;
-    }
+    jint result = -1;
+    AwtWindow* window = NULL;
 
-    jint result = 0;
-    AwtWindow *w = (AwtWindow *)pData;
-    if (::IsWindow(w->GetHWnd()))
+    // Our native resources may have been destroyed before the Java peer,
+    // e.g., if dispose() was called. In that case, return the default screen.
+    PDATA pData;
+    JNI_CHECK_PEER_GOTO(self, ret);
+    window = (AwtWindow *)pData;
+    if (::IsWindow(window->GetHWnd()))
     {
-        result = (jint)w->GetScreenImOn();
+        result = (jint)window->GetScreenImOn();
     }
 
+  ret:
     env->DeleteGlobalRef(self);
-
-    return result;
+    return (result != -1) ? result : AwtWin32GraphicsDevice::GetDefaultDeviceIndex();
 }
 
 void AwtWindow::_SetFocusableWindow(void *param)

test/jdk/java/awt/Frame/BogusFocusableWindowState/BogusFocusableWindowState.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright Amazon.com Inc. 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.
+ */
+
+import java.awt.Window;
+
+/**
+ * @test
+ * @bug 8346952
+ * @summary Verifies no exception occurs when triggering updateCG()
+ * for an ownerless window.
+ * @key headful
+ */
+public final class BogusFocusableWindowState {
+
+    public static void main(String[] args) {
+        Window frame = new Window(null) {
+            @Override
+            public boolean getFocusableWindowState() {
+                removeNotify();
+                return true;
+            }
+        };
+        try {
+            frame.pack();
+            frame.setVisible(true);
+        } finally {
+            frame.dispose();
+        }
+    }
+}

test/jdk/java/awt/Frame/GetGraphicsStressTest/GetGraphicsStressTest.java

@@ -27,7 +27,7 @@
 
 /**
  * @test
- * @bug 8235638 8235739 8285094
+ * @bug 8235638 8235739 8285094 8346952
  * @key headful
  */
 public final class GetGraphicsStressTest {