8342992: Security manager check should not use deprecated methods

modules/javafx.base/src/main/java/com/sun/javafx/SMUtil.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2024, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+
+package com.sun.javafx;
+
+import java.lang.reflect.InvocationTargetException;
+
+/**
+ * Utility class to check for the presence of a security manager
+ */
+public class SMUtil {
+
+    // Prevent class from being instantiated.
+    private SMUtil() {}
+
+    /**
+     * Check for the presence of a security manager (from an older JDK) and
+     * throw UnsupportedOperationException if enabled. Use reflection to avoid
+     * a dependency on an API that is deprecated for removal. This method does
+     * nothing if the security manager is not enabled or if
+     * System::getSecurityManager cannot be invoked.
+     */
+    public static void checkSM() {
+
+        var clazz = System.class;
+        try {
+            // Call System.getSecurityManager() using reflection. Fail if it
+            // is not null. If we cannot find or invoke getSecurityManager,
+            // ignore the error.
+            var meth = clazz.getMethod("getSecurityManager");
+            var sm = meth.invoke(null);
+            if (sm != null) {
+                throw new UnsupportedOperationException("JavaFX does not support running with the Security Manager");
+            }
+        } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException ex) {
+            // Ignore the error
+        }
+    }
+}

modules/javafx.base/src/main/java/com/sun/javafx/reflect/MethodUtil.java

@@ -25,6 +25,7 @@
 
 package com.sun.javafx.reflect;
 
+import com.sun.javafx.SMUtil;
 import java.security.AllPermission;
 import java.security.AccessController;
 import java.security.PermissionCollection;
@@ -77,6 +78,11 @@ private static Object invoke(Method m, Object obj, Object[] params)
  * Create a trampoline class.
  */
 public final class MethodUtil extends SecureClassLoader {
+    static {
+        // Check whether security manager is enabled and throw exception if it is.
+        SMUtil.checkSM();
+    }
+
     private static final String MISC_PKG = "com.sun.javafx.reflect.";
     private static final String TRAMPOLINE = MISC_PKG + "Trampoline";
     private static final Method bounce = getTrampoline();

modules/javafx.base/src/main/java/com/sun/javafx/reflect/ReflectUtil.java

@@ -26,10 +26,16 @@
 
 package com.sun.javafx.reflect;
 
+import com.sun.javafx.SMUtil;
 import java.lang.reflect.Proxy;
 
 public final class ReflectUtil {
 
+    static {
+        // Check whether security manager is enabled and throw exception if it is.
+        SMUtil.checkSM();
+    }
+
     private ReflectUtil() {
     }
 

modules/javafx.graphics/src/main/java/com/sun/javafx/application/LauncherImpl.java

@@ -26,6 +26,7 @@
 package com.sun.javafx.application;
 
 import com.sun.javafx.PlatformUtil;
+import com.sun.javafx.SMUtil;
 import javafx.application.Application;
 import javafx.application.Preloader;
 import javafx.application.Preloader.ErrorNotification;
@@ -57,12 +58,8 @@
 public class LauncherImpl {
 
     static {
-        @SuppressWarnings("removal")
-        var sm = System.getSecurityManager();
-        if (sm != null) {
-            throw new UnsupportedOperationException("JavaFX does not support running with the Security Manager");
-        }
-
+        // Check whether security manager is enabled and throw exception if it is.
+        SMUtil.checkSM();
     }
 
     /**

modules/javafx.graphics/src/main/java/com/sun/javafx/application/PlatformImpl.java

@@ -27,6 +27,7 @@
 
 import static com.sun.javafx.FXPermissions.CREATE_TRANSPARENT_WINDOW_PERMISSION;
 import com.sun.javafx.PlatformUtil;
+import com.sun.javafx.SMUtil;
 import com.sun.javafx.application.preferences.PlatformPreferences;
 import com.sun.javafx.application.preferences.PreferenceMapping;
 import com.sun.javafx.css.StyleManager;
@@ -61,12 +62,8 @@
 public class PlatformImpl {
 
     static {
-        @SuppressWarnings("removal")
-        var sm = System.getSecurityManager();
-        if (sm != null) {
-            throw new UnsupportedOperationException("JavaFX does not support running with the Security Manager");
-        }
-
+        // Check whether security manager is enabled and throw exception if it is.
+        SMUtil.checkSM();
     }
 
     private static AtomicBoolean initialized = new AtomicBoolean(false);