56 lines
2.2 KiB
Java
56 lines
2.2 KiB
Java
/*
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* Copyright (c) 2023, 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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* @test
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* @bug 8310297
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* @summary Negative fields shorter than an int may not be sign extended in cpool
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* but should in static field initializers. javac gives an error for this but
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* not other sources of bytecodes. With checked_cast<> this crashes.
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* @compile CompatByteFieldInit.jasm
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* @run main ByteFieldInitTest
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*/
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import java.lang.reflect.Field;
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public class ByteFieldInitTest {
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final static byte b = -128; // compare with 0x80
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final static short s = -32768; // compare with 0x8000
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public static void main(java.lang.String[] unused) throws Exception {
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// javac is smart enough to complain about the other class's byte and short values when referred
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// to directly. With checked_cast<> loading this class should fail.
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Class<?> c = Class.forName("CompatByteFieldInit");
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Field cb = c.getDeclaredField("b");
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Field cs = c.getDeclaredField("s");
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if (b != cb.getByte(null) || s != cs.getShort(null)) {
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throw new RuntimeException("constant pool init not compatible " + cb.getByte(null) + " " + cs.getShort(null));
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} else {
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System.out.println("Fields are same test passed");
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}
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}
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}
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