93 lines
3.7 KiB
Java
93 lines
3.7 KiB
Java
/*
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* Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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import java.io.File;
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import java.net.URL;
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import java.net.URLClassLoader;
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import sun.hotspot.WhiteBox;
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//
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// Test class mirror objects are cached when open archive heap objects are mapped:
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// - Well-known shared library classes:
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// java.lang.Object
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// java.lang.String
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// - Shared application class loaded by the system class loader
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// - Shared application class loaded user defined class loader
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//
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public class CheckCachedMirrorApp {
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static WhiteBox wb;
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public static void main(String args[]) throws Exception {
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String path = args[0];
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URL url = new File(path).toURI().toURL();
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URL[] urls = new URL[] {url};
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URLClassLoader loader = new URLClassLoader(urls);
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Class hello = loader.loadClass("Hello");
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System.out.println("Loaded " + hello + " from " + url + " using loader " + loader);
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wb = WhiteBox.getWhiteBox();
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if (!wb.areOpenArchiveHeapObjectsMapped()) {
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System.out.println("Archived open_archive_heap objects are not mapped.");
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System.out.println("This may happen during normal operation. Test Skipped.");
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return;
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}
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// Well-known shared library classes
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Class object_class = Object.class;
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checkMirror(object_class, true);
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Class string_class = String.class;
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checkMirror(string_class, true);
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// Shared app class
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Class app_class = CheckCachedMirrorApp.class;
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checkMirror(app_class, true);
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// Hello is shared class and loaded by the 'loader' defined in current app.
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// It should not have cached resolved_references.
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Class class_with_user_defined_loader = hello;
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checkMirror(class_with_user_defined_loader, false);
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}
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static void checkMirror(Class c, boolean mirrorShouldBeArchived) {
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System.out.print("Check cached mirror for " + c);
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if (wb.isSharedClass(c)) {
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// Check if the Class object is cached
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if (mirrorShouldBeArchived && wb.isShared(c)) {
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System.out.println(c + " mirror is cached. Expected.");
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} else if (!mirrorShouldBeArchived && !wb.isShared(c)) {
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System.out.println(c + " mirror is not cached. Expected.");
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} else if (mirrorShouldBeArchived && !wb.isShared(c)) {
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throw new RuntimeException(
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"FAILED. " + c + " mirror is not cached.");
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} else {
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throw new RuntimeException(
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"FAILED. " + c + " mirror should not be cached.");
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}
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} else {
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System.out.println("Class " + c + "is not shared, skipping the check for mirror");
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}
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}
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}
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