1 /*
   2  * Copyright (c) 2014, 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 import java.io.IOException;
  25 import java.io.InputStream;
  26 import java.util.Map;
  27 
  28 import jdk.testlibrary.ProcessTools;
  29 
  30 import com.sun.jdi.Bootstrap;
  31 import com.sun.jdi.VirtualMachine;
  32 import com.sun.jdi.connect.AttachingConnector;
  33 import com.sun.jdi.connect.Connector;
  34 import com.sun.jdi.connect.IllegalConnectorArgumentsException;
  35 
  36 /**
  37  * @test
  38  * @bug 4527279
  39  * @summary Unit test for ProcessAttachingConnector
  40  *
  41  * @library /lib/testlibrary
  42  * @modules java.management
  43  *          jdk.jdi
  44  * @build jdk.testlibrary.* ProcessAttachTest
  45  * @run driver ProcessAttachTest
  46  */
  47 
  48 class ProcessAttachTestTarg {
  49     public static void main(String args[]) throws Exception {
  50         // Write something that can be read by the driver
  51         System.out.println("Debuggee started");
  52         System.out.flush();
  53         for (;;) {
  54             Thread.sleep(100);
  55         }
  56     }
  57 }
  58 
  59 public class ProcessAttachTest {
  60 
  61     public static final String TESTCLASSES = System.getProperty("test.classes");
  62 
  63     public static void main(String[] args) throws Exception {
  64 
  65         System.out.println("Test 1: Debuggee start with suspend=n");
  66         runTest("-agentlib:jdwp=transport=dt_socket,server=y,suspend=n");
  67 
  68         System.out.println("Test 2: Debuggee start with suspend=y");
  69         runTest("-agentlib:jdwp=transport=dt_socket,server=y,suspend=y");
  70 
  71     }
  72 
  73     private static void runTest(String jdwpArg) throws Exception {
  74         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  75                 jdwpArg,
  76                 "-classpath", TESTCLASSES,
  77                 "ProcessAttachTestTarg");
  78         Process p = null;
  79         try {
  80             p = pb.start();
  81 
  82             // Wait for the process to start
  83             InputStream is = p.getInputStream();
  84             is.read();
  85 
  86             // Attach a debugger
  87             tryDebug(p.pid());
  88         } finally {
  89             p.destroyForcibly();
  90         }
  91     }
  92 
  93     private static void tryDebug(long pid) throws IOException,
  94             IllegalConnectorArgumentsException {
  95         AttachingConnector ac = Bootstrap.virtualMachineManager().attachingConnectors()
  96                 .stream()
  97                 .filter(c -> c.name().equals("com.sun.jdi.ProcessAttach"))
  98                 .findFirst()
  99                 .orElseThrow(() -> new RuntimeException("Unable to locate ProcessAttachingConnector"));
 100 
 101         Map<String, Connector.Argument> args = ac.defaultArguments();
 102         Connector.StringArgument arg = (Connector.StringArgument) args
 103                 .get("pid");
 104         arg.setValue("" + pid);
 105 
 106         System.out.println("Debugger is attaching to: " + pid + " ...");
 107         VirtualMachine vm = ac.attach(args);
 108 
 109         // list all threads
 110         System.out.println("Attached! Now listing threads ...");
 111         vm.allThreads().stream().forEach(System.out::println);
 112 
 113         System.out.println("Debugger done.");
 114         vm.dispose();
 115     }
 116 }