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/*
* Copyright (c) 2018, 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.
*
*/
import java.io.File;
import java.net.URL;
import sun.hotspot.WhiteBox;
//
// - Test static final String field with initial value in cached mirror should be also archived.
// - GC should not crash when reference fields in cached mirror are updated at runtime
// - Reference fields are updated to point to runtime created objects
// - Reference fields are nullified
//
public class MirrorWithReferenceFieldsApp {
// Static String field with initial value
static final String archived_field = "abc";
// Static object field
static Object non_archived_field_1;
// Instance field
Integer non_archived_field_2;
public MirrorWithReferenceFieldsApp() {
non_archived_field_1 = new Object();
non_archived_field_2 = new Integer(1);
}
public static void main(String args[]) throws Exception {
WhiteBox wb = WhiteBox.getWhiteBox();
if (!wb.areOpenArchiveHeapObjectsMapped()) {
System.out.println("Archived open_archive_heap objects are not mapped.");
System.out.println("This may happen during normal operation. Test Skipped.");
return;
}
MirrorWithReferenceFieldsApp m = new MirrorWithReferenceFieldsApp();
m.test(wb);
}
public void test(WhiteBox wb) {
Class c = MirrorWithReferenceFieldsApp.class;
if (wb.isSharedClass(c)) {
// Check if the Class object is cached
if (wb.isShared(c)) {
System.out.println(c + " mirror is cached. Expected.");
} else {
throw new RuntimeException(
"FAILED. " + c + " mirror should be cached.");
}
// Check fields
if (wb.isShared(archived_field)) {
System.out.println("archived_field is archived as excepted");
} else {
throw new RuntimeException(
"FAILED. archived_field is not archived.");
}
// GC should not crash
System.gc();
System.gc();
System.gc();
non_archived_field_1 = null;
non_archived_field_2 = null;
System.gc();
System.gc();
System.gc();
System.out.println("Done.");
}
}
}
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