63 lines
2.5 KiB
Java
63 lines
2.5 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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import java.lang.instrument.ClassFileTransformer;
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import java.lang.instrument.Instrumentation;
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import java.util.Map;
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import java.util.Set;
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/**
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* Agent used by TraceUsageTest. The premain and agentmain methods invoke Instrumentation
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* methods so the usages can be traced by the test.
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*/
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public class TraceUsageAgent {
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public static void premain(String methodNames, Instrumentation inst) throws Exception {
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test(methodNames, inst);
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}
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public static void agentmain(String methodNames, Instrumentation inst) throws Exception {
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test(methodNames, inst);
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}
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private static void test(String methodNames, Instrumentation inst) throws Exception {
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for (String methodName : methodNames.split(",")) {
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switch (methodName) {
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case "addTransformer" -> {
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var transformer = new ClassFileTransformer() { };
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inst.addTransformer(transformer);
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}
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case "retransformClasses" -> {
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inst.retransformClasses(Object.class);
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}
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case "redefineModule" -> {
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Module base = Object.class.getModule();
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inst.redefineModule(base, Set.of(), Map.of(), Map.of(), Set.of(), Map.of());
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}
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default -> {
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throw new RuntimeException("Unknown method name: " + methodName);
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}
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}
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}
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}
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}
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