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/*
* Copyright (c) 2017, 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 8178870
* @library /testlibrary
* @summary Redefine class with CFLH twice to test deleting the cached_class_file
* @build RedefineClassHelper
* @run main RedefineClassHelper
* @run main/othervm -javaagent:redefineagent.jar RedefineDoubleDelete
*/
public class RedefineDoubleDelete {
// Class gets a redefinition error because it adds a data member
public static String newB =
"class RedefineDoubleDelete$B {" +
" int count1 = 0;" +
"}";
public static String newerB =
"class RedefineDoubleDelete$B { " +
" int faa() { System.out.println(\"baa\"); return 2; }" +
"}";
// The ClassFileLoadHook for this class turns foo into faa and prints out faa.
static class B {
int faa() { System.out.println("foo"); return 1; }
}
public static void main(String args[]) throws Exception {
B b = new B();
int val = b.faa();
if (val != 1) {
throw new RuntimeException("return value wrong " + val);
}
// Redefine B twice to get cached_class_file in both B scratch classes
try {
RedefineClassHelper.redefineClass(B.class, newB);
} catch (java.lang.UnsupportedOperationException e) {
// this is expected
}
try {
RedefineClassHelper.redefineClass(B.class, newB);
} catch (java.lang.UnsupportedOperationException e) {
// this is expected
}
// Do a full GC.
System.gc();
// Redefine with a compatible class
RedefineClassHelper.redefineClass(B.class, newerB);
val = b.faa();
if (val != 2) {
throw new RuntimeException("return value wrong " + val);
}
// Do another full GC to clean things up.
System.gc();
}
}
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