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64 lines
2.5 KiB
Java
64 lines
2.5 KiB
Java
/*
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* Copyright (c) 2025, 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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* @summary Test that parsing a hidden class with max constant pool entries
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* doesn't crash the VM when adding an entry for the hidden class name.
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* Instead throws ClassFormatError.
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* @bug 8364360
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* @modules java.base/jdk.internal.access
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* java.base/jdk.internal.reflect
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* @library /testlibrary/asm
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* @run main HiddenClassesTest
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*/
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import java.lang.invoke.MethodHandles;
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import org.objectweb.asm.ClassWriter;
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import static org.objectweb.asm.Opcodes.ACC_PUBLIC;
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import static org.objectweb.asm.Opcodes.V17;
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public class HiddenClassesTest {
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public static void main(String[] args) throws Exception {
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var cw = new ClassWriter(0);
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cw.visit(V17, ACC_PUBLIC, "Hidden", null, "java/lang/Object", null);
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// This magic number causes a constant pool index overflow with this asm generated class.
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int i = 0;
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while (i < 65535-1) {
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i = cw.newUTF8(Integer.toString(i));
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}
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try {
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MethodHandles.lookup().defineHiddenClass(cw.toByteArray(), false);
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throw new RuntimeException("Test Failed: ClassFormatError expected.");
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} catch (ClassFormatError cfe) {
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String message = cfe.getMessage();
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if (message == null || !message.contains("Overflow in constant pool size for hidden class")) {
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throw new RuntimeException("Test Failed: wrong ClassFormatError " + message);
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}
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System.out.println("ClassFormatError thrown as expected. Message: " + cfe.getMessage());
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}
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}
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}
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