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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
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 */

import jdk.internal.org.objectweb.asm.*;

/*
 * @test
 * @summary Test that the JVM throws NCDFE for class file version 53 when a
 *          CONSTANT_Module type is in the constant pool and ACC_MODULE is
 *          set in the access_flags.
 * @bug 8175383
 * @library /test/lib
 * @modules java.base/jdk.internal.org.objectweb.asm
 * @compile -XDignore.symbol.file ConstModuleACC.java
 * @run main ConstModuleACC
 */

public class ConstModuleACC {

    static final String CLASS_NAME = "FooModACC";

    public static void main(String[] args) throws Exception {
        ClassWriter cw = new ClassWriter(0);
        int ACC_MODULE = 0x8000;
        cw.visit(Opcodes.V1_9,
                Opcodes.ACC_INTERFACE + Opcodes.ACC_ABSTRACT + Opcodes.ACC_SYNTHETIC + ACC_MODULE,
                CLASS_NAME,
                null,
                "java/lang/Object",
                null);

        cw.visitAttribute(new TestAttribute("jdk.fooModACC"));

        cw.visitEnd();
        byte[] bytes = cw.toByteArray();


        ClassLoader loader = new ClassLoader(ConstModuleACC.class.getClassLoader()) {
            @Override
            protected Class<?> findClass(String cn)throws ClassNotFoundException {
                if (cn.equals(CLASS_NAME)) {
                    try {
                        Class superClass = super.defineClass(cn, bytes, 0, bytes.length);
                        throw new RuntimeException("Expected NoClassDefFoundError not thrown");
                    } catch (java.lang.NoClassDefFoundError e) {
                       if (!e.getMessage().contains(
                           "is not a class because access_flag ACC_MODULE is set")) {
                           throw new RuntimeException("Wrong NoClassDefFoundError exception: " + e.getMessage());
                       }
                    }
                } else {
                    throw new ClassNotFoundException(cn);
                }
                return null;
            }
        };

        Class<?> clazz = loader.loadClass(CLASS_NAME);
    }

    /**
     * ConstModuleACCAttr attribute.
     *
     * <pre> {@code
     *
     * MainClass_attribute {
     *   // index to CONSTANT_utf8_info structure in constant pool representing
     *   // the string "ConstModuleACCAttr"
     *   u2 attribute_name_index;
     *   u4 attribute_length;
     *
     *   // index to CONSTANT_Module_info structure
     *   u2 module_name_index
     * }
     *
     * } </pre>
     */
    public static class TestAttribute extends Attribute {
        private final String moduleName;

        public TestAttribute(String moduleName) {
            super("ConstModuleACCAttr");
            this.moduleName = moduleName;
        }

        public TestAttribute() {
            this(null);
        }

        @Override
        protected Attribute read(ClassReader cr,
                                 int off,
                                 int len,
                                 char[] buf,
                                 int codeOff,
                                 Label[] labels)
        {
            String mn = cr.readModule(off, buf);
            off += 2;
            return new TestAttribute(mn);
        }

        @Override
        protected ByteVector write(ClassWriter cw,
                                   byte[] code,
                                   int len,
                                   int maxStack,
                                   int maxLocals)
        {
            ByteVector attr = new ByteVector();
            attr.putShort(cw.newModule(moduleName));
            return attr;
        }
    }
}