105 lines
3.7 KiB
Java
105 lines
3.7 KiB
Java
/*
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* Copyright (c) 2024, 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 Basic compatibility test for Attach API v2
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* @bug 8219896
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* @library /test/lib
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* @modules jdk.attach/sun.tools.attach
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*
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* @run main/othervm -Xlog:attach=trace CompatTest
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* @run main/othervm -Xlog:attach=trace -Djdk.attach.compat=true CompatTest
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*/
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import java.io.BufferedReader;
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import java.io.InputStreamReader;
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import java.io.IOException;
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import com.sun.tools.attach.VirtualMachine;
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import sun.tools.attach.HotSpotVirtualMachine;
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import jdk.test.lib.apps.LingeredApp;
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public class CompatTest {
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public static void main(String[] args) throws Exception {
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// if the test (client part) in the "compat" mode
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boolean clientCompat = "true".equals(System.getProperty("jdk.attach.compat"));
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System.out.println("Client is in compat mode: " + clientCompat);
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LingeredApp app = null;
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try {
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app = LingeredApp.startApp("-Xlog:attach=trace");
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test(app, clientCompat);
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} finally {
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LingeredApp.stopApp(app);
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}
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try {
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app = LingeredApp.startApp("-Xlog:attach=trace", "-Djdk.attach.compat=true");
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// target VM in "compat" mode, always expect failure
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test(app, true);
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} finally {
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LingeredApp.stopApp(app);
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}
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}
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// The test uses HotSpotVirtualMachine.setFlag method with long flag value.
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// For attach API v1 an exception is expected to be thrown (argument cannot be longer than 1024 characters).
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private static String flagName = "HeapDumpPath";
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// long for v1
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private static String flagValue = "X" + "A".repeat(1024) + "X";
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private static void test(LingeredApp app, boolean expectFailure) throws Exception {
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System.out.println("======== Start ========");
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HotSpotVirtualMachine vm = (HotSpotVirtualMachine)VirtualMachine.attach(String.valueOf(app.getPid()));
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BufferedReader replyReader = null;
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try {
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replyReader = new BufferedReader(new InputStreamReader(
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vm.setFlag(flagName, flagValue)));
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if (expectFailure) {
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throw new RuntimeException("No expected exception is thrown");
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}
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String line;
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while ((line = replyReader.readLine()) != null) {
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System.out.println("setFlag reply: " + line);
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}
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replyReader.close();
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} catch (IOException ex) {
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System.out.println("OK: setFlag thrown expected exception:");
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ex.printStackTrace(System.out);
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} finally {
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vm.detach();
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}
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System.out.println("======== End ========");
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System.out.println();
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}
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}
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