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Datei: crash.jar Sprache: JAVA

/*
* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2018 SAP SE. 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.
*/

/**
* @test
* @bug 8214892
* @summary Test that the onjcmd option of the jdwp agent works.
*
* @author Ralf Schmelter
*
* @library /test/lib
* @run compile --add-exports java.base/jdk.internal.vm=ALL-UNNAMED -g OnJcmdTest.java
* @run main/othervm --add-exports java.base/jdk.internal.vm=ALL-UNNAMED -agentlib:jdwp=transport=dt_socket,address=localhost:0,onjcmd=y,server=y OnJcmdTest
*/

import java.lang.reflect.Method;
import java.util.Properties;

import jdk.internal.vm.VMSupport;
import jdk.test.lib.JDKToolFinder;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;

public class OnJcmdTest {

    private static String getListenerAddress() throws Exception {
        Properties props = VMSupport.getAgentProperties();
        return props.getProperty("sun.jdwp.listenerAddress", null);
    }

    public static void main(String[] args) throws Throwable {
        // First check if we get the expected errors.
        OutputAnalyzer output = ProcessTools.executeTestJvm(
                "-agentlib:jdwp=transport=dt_socket,address=any,onjcmd=y");
        output.shouldContain("Can only use onjcmd with server=y");
        output.shouldHaveExitValue(1);

        output = ProcessTools.executeTestJvm(
                "-agentlib:jdwp=transport=dt_socket,address=any,onjcmd=y,onthrow=a,launch=a");
        output.shouldContain("Cannot combine onjcmd and launch suboptions");
        output.shouldHaveExitValue(1);

        // Make sure debugging is not yet started.
        String prop = getListenerAddress();

        if (prop != null) {
            throw new RuntimeException("Listener address was set to " + prop);
        }

        // Now start it (test that it is OK to do this more than once).
        for (int i = 0; i < 3; ++i) {
            String jcmd = JDKToolFinder.getJDKTool("jcmd");
            output = ProcessTools.executeProcess(jcmd,
                    Long.toString(ProcessTools.getProcessId()),
                    "VM.start_java_debugging");

            String exp_str = i == 0 ? "Debugging has been started." :
                                      "Debugging is already active.";
            output.shouldContain(exp_str);
            output.shouldContain("Transport : dt_socket");
            output.shouldHaveExitValue(0);
        }

        // Now the property should be set, as the jdwp agent waits for a
        // connection.
        long t1 = System.currentTimeMillis();
        long t2 = t1;

        while(t2 - t1 < 4000) {
            prop = getListenerAddress();

            if (prop != null) {
                if (prop.equals("localhost:0")) {
                    throw new RuntimeException("Port was not expanded");
                } else if (!prop.startsWith("dt_socket:")) {
                    throw new RuntimeException("Invalid transport prop " + prop);
                }

                return;
            }

            Thread.sleep(50);
            t2 = System.currentTimeMillis();
        }

        throw new RuntimeException("Debugging backend didn't start");
    }
}

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