/*
* Copyright (c) 2007, 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 6490436
* @summary Verify that protected constructor calls are not allowed for classfile version >= 50 (but that they are allowed for lesser versions).
* @author Keith McGuigan
*/
public class VerifyProtectedConstructor extends ClassLoader {
public static void main(String argv[]) throws Exception {
VerifyProtectedConstructor t = new VerifyProtectedConstructor();
t.loadSuperClass();
try {
t.checkClassVersion(49); // should not throw VerifyError
}
catch(VerifyError e) {
throw new Exception("FAIL: should be no VerifyError for CF version 49");
}
try {
t.checkClassVersion(50); // should throw VerifyError
throw new Exception("FAIL: should be a VerifyError for CF version 50");
}
catch(VerifyError e) {
System.out.println("PASS");
}
}
private void loadSuperClass() {
/* -- code for super class A.A --
package A;
public class A {
protected A() {}
}
*/
long[] cls_data = {
0xcafebabe00000032L, 0x000a0a0003000707L,
0x0008070009010006L, 0x3c696e69743e0100L,
0x0328295601000443L, 0x6f64650c00040005L,
0x010003412f410100L, 0x106a6176612f6c61L,
0x6e672f4f626a6563L, 0x7400210002000300L,
0x0000000001000400L, 0x0400050001000600L,
0x0000110001000100L, 0x0000052ab70001b1L,
0x0000000000000000L // 2 bytes extra
};
final int EXTRA = 2;
byte cf_bytes[] = toByteArray(cls_data);
defineClass("A.A", cf_bytes, 0, cf_bytes.length - EXTRA);
}
private int num_calls;
private static String classNames[] = { "B.B", "C.C" };
private void checkClassVersion(int version) throws VerifyError {
// This class is in violation of the spec since it accesses
// a protected constructor of a superclass while not being in the
// same package.
/* -- code for test class --
package B;
public class B extends A.A {
public static void f() { new A.A(); }
}
*/
long[] cls_data = {
0xcafebabe00000032L, 0x000b0a0002000807L,
0x000907000a010006L, 0x3c696e69743e0100L,
0x0328295601000443L, 0x6f6465010001660cL,
0x0004000501000341L, 0x2f41010003422f42L,
0x0021000300020000L, 0x0000000200010004L,
0x0005000100060000L, 0x0011000100010000L,
0x00052ab70001b100L, 0x0000000009000700L,
0x0500010006000000L, 0x1500020000000000L,
0x09bb000259b70001L, 0x57b1000000000000L // no extra bytes
};
final int EXTRA = 0;
byte cf_bytes[] = toByteArray(cls_data);
// set version
cf_bytes[7] = (byte)version;
// Change B.B to C.C, D.D, ... for subsequent calls so we can call this
// multiple times and define different classes.
cf_bytes[61] += num_calls;
cf_bytes[63] += num_calls;
String name = classNames[num_calls];
num_calls++;
Class c = defineClass(name, cf_bytes, 0, cf_bytes.length - EXTRA);
try { c.newInstance(); } // to force linking, thus verification
catch(InstantiationException e) {}
catch(IllegalAccessException e) {}
}
static private byte[] toByteArray(long arr[]) {
// convert long array to byte array
java.nio.ByteBuffer bbuf = java.nio.ByteBuffer.allocate(arr.length * 8);
bbuf.asLongBuffer().put(java.nio.LongBuffer.wrap(arr));
return bbuf.array();
}
}