1 /*

     2  * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /*

    25  * @test

    26  * @summary Checks that the jshdb debugd utility sucessfully starts

    27  *          and tries to attach to a running process

    28  * @modules java.base/jdk.internal.misc

    29  * @library /test/lib

    30  *

    31  * @run main/othervm SADebugDTest

    32  */

    33 import java.io.File;

    34 import java.util.concurrent.CountDownLatch;

    35 import java.io.InputStreamReader;

    36 import java.io.BufferedReader;

    37 import java.io.Reader;

    38 import java.util.concurrent.TimeUnit;

    39 import java.util.function.Predicate;

    40 import static jdk.test.lib.Asserts.assertTrue;

    41 import static jdk.test.lib.Platform.shouldSAAttach;

    42 import static jdk.test.lib.process.ProcessTools.startProcess;

    43 

    44 public class SADebugDTest {

    45 

    46     private static final String GOLDEN = "Attaching to process ID %d and starting RMI services, please wait...";

    47 

    48     private static final String JAVA_HOME = (System.getProperty("test.jdk") != null)

    49             ? System.getProperty("test.jdk") : System.getProperty("java.home");

    50 

    51     private static final String JAVA_BIN_DIR

    52             = JAVA_HOME + File.separator + "bin" + File.separator;

    53 

    54     private static final String JHSDB = JAVA_BIN_DIR + "jhsdb";

    55 

    56     public static void main(String[] args) throws Exception {

    57 

    58         if (!shouldSAAttach()) {

    59             log("Not possible to attach the SA. Skipping the test");

    60             return;

    61         }

    62 

    63         long ourPid = ProcessHandle.current().pid();

    64 

    65         // The string we are expecting in the debugd ouput

    66         String golden = String.format(GOLDEN, ourPid);

    67 

    68         // We are going to run 'jhsdb debugd <our pid>'

    69         // The startProcess will block untl the 'golden' string appears in either process' stdout or stderr

    70         // In case of timeout startProcess kills the debugd process

    71         ProcessBuilder pb = new ProcessBuilder();

    72         pb.command(JHSDB, "debugd", String.valueOf(ourPid));

    73         Process debugd = startProcess("debugd", pb, null, (line) -> line.trim().contains(golden), 0, TimeUnit.SECONDS);

    74 

    75         // If we are here, this means we have received the golden line and the test has passed

    76         // The debugd remains running, we have to kill it

    77         debugd.destroy();

    78 

    79     }

    80 

    81     private static void log(String string) {

    82         System.out.println(string);

    83     }

    84 

    85 }