--- old/test/hotspot/jtreg/runtime/appcds/javaldr/AnonVmClassesDuringDumpTransformer.java 2019-07-24 08:27:26.805469087 -0400 +++ /dev/null 2019-07-22 09:37:15.068007775 -0400 @@ -1,67 +0,0 @@ -/* - * Copyright (c) 2018, 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. - * - */ - -import java.lang.instrument.ClassFileTransformer; -import java.lang.instrument.Instrumentation; -import java.lang.instrument.IllegalClassFormatException; -import java.security.ProtectionDomain; - -public class AnonVmClassesDuringDumpTransformer implements ClassFileTransformer { - public byte[] transform(ClassLoader loader, String name, Class classBeingRedefined, - ProtectionDomain pd, byte[] buffer) throws IllegalClassFormatException { - return null; - } - - private static Instrumentation savedInstrumentation; - - public static void premain(String agentArguments, Instrumentation instrumentation) { - System.out.println("ClassFileTransformer.premain() is called"); - instrumentation.addTransformer(new AnonVmClassesDuringDumpTransformer(), /*canRetransform=*/true); - savedInstrumentation = instrumentation; - - // This will create a Lambda, which will result in some Anonymous VM Classes - // being generated. - // - // Look for something like these in the STDOUT: - // ---------------- - // ClassFileTransformer.premain() is called - // Dumping class files to DUMP_CLASS_FILES/... - // dump: DUMP_CLASS_FILES/java/lang/invoke/LambdaForm$MH000.class - // dump: DUMP_CLASS_FILES/java/lang/invoke/LambdaForm$MH001.class - // Invoked inside a Lambda - // ---------------- - Runnable r = () -> { - System.out.println("Invoked inside a Lambda"); - }; - r.run(); - } - - public static Instrumentation getInstrumentation() { - return savedInstrumentation; - } - - public static void agentmain(String args, Instrumentation inst) throws Exception { - premain(args, inst); - } -} --- /dev/null 2019-07-22 09:37:15.068007775 -0400 +++ new/test/hotspot/jtreg/runtime/cds/javaldr/AnonVmClassesDuringDumpTransformer.java 2019-07-24 08:27:26.545469096 -0400 @@ -0,0 +1,67 @@ +/* + * Copyright (c) 2018, 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. + * + */ + +import java.lang.instrument.ClassFileTransformer; +import java.lang.instrument.Instrumentation; +import java.lang.instrument.IllegalClassFormatException; +import java.security.ProtectionDomain; + +public class AnonVmClassesDuringDumpTransformer implements ClassFileTransformer { + public byte[] transform(ClassLoader loader, String name, Class classBeingRedefined, + ProtectionDomain pd, byte[] buffer) throws IllegalClassFormatException { + return null; + } + + private static Instrumentation savedInstrumentation; + + public static void premain(String agentArguments, Instrumentation instrumentation) { + System.out.println("ClassFileTransformer.premain() is called"); + instrumentation.addTransformer(new AnonVmClassesDuringDumpTransformer(), /*canRetransform=*/true); + savedInstrumentation = instrumentation; + + // This will create a Lambda, which will result in some Anonymous VM Classes + // being generated. + // + // Look for something like these in the STDOUT: + // ---------------- + // ClassFileTransformer.premain() is called + // Dumping class files to DUMP_CLASS_FILES/... + // dump: DUMP_CLASS_FILES/java/lang/invoke/LambdaForm$MH000.class + // dump: DUMP_CLASS_FILES/java/lang/invoke/LambdaForm$MH001.class + // Invoked inside a Lambda + // ---------------- + Runnable r = () -> { + System.out.println("Invoked inside a Lambda"); + }; + r.run(); + } + + public static Instrumentation getInstrumentation() { + return savedInstrumentation; + } + + public static void agentmain(String args, Instrumentation inst) throws Exception { + premain(args, inst); + } +}