jdk8-mips64-public/hotspot: test/serviceability/attach/AttachWithStalePidFile.java@09f19d3de485 (annotated)

test/serviceability/attach/AttachWithStalePidFile.java@09f19d3de485 (annotated)

test/serviceability/attach/AttachWithStalePidFile.java

Thu, 05 Jun 2014 15:55:49 +0200

author: ykantser
date: Thu, 05 Jun 2014 15:55:49 +0200
changeset 6717: 09f19d3de485
parent 5412: 2e8f19c2feef
child 6876: 710a3c8b516e
permissions: -rw-r--r--

8043915: Tests get ClassNotFoundException: com.oracle.java.testlibrary.StreamPumper
Reviewed-by: sla, allwin

 /*
  * Copyright (c) 2013, Oracle and/or its affiliates. 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 7162400
  * @key regression
  * @summary Regression test for attach issue where stale pid files in /tmp lead to connection issues
  * @library /testlibrary
  * @build com.oracle.java.testlibrary.* AttachWithStalePidFileTarget
  * @run main AttachWithStalePidFile
  */
 import com.oracle.java.testlibrary.*;
 import com.sun.tools.attach.VirtualMachine;
 import sun.tools.attach.HotSpotVirtualMachine;
 import java.lang.reflect.Field;
 import java.nio.file.*;
 import java.nio.file.attribute.*;
 import java.io.*;
 public class AttachWithStalePidFile {
   public static void main(String... args) throws Exception {
     // this test is only valid on non-Windows platforms
     if(Platform.isWindows()) {
       System.out.println("This test is only valid on non-Windows platforms.");
       return;
     }
     // Since there might be stale pid-files owned by different
     // users on the system we may need to retry the test in case we
     // are unable to remove the existing file.
     int retries = 5;
     while(!runTest() && --retries > 0);
     if(retries == 0) {
       throw new RuntimeException("Test failed after 5 retries. " +
         "Remove any /tmp/.java_pid* files and retry.");
     }
   }
   public static boolean runTest() throws Exception {
     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
       "-XX:+UnlockDiagnosticVMOptions", "-XX:+PauseAtStartup", "AttachWithStalePidFileTarget");
     Process target = pb.start();
     Path pidFile = null;
     try {
       int pid = getUnixProcessId(target);
       // create the stale .java_pid file. use hard-coded /tmp path as in th VM
       pidFile = createJavaPidFile(pid);
       if(pidFile == null) {
         return false;
       }
       // wait for vm.paused file to be created and delete it once we find it.
       waitForAndResumeVM(pid);
       // unfortunately there's no reliable way to know the VM is ready to receive the
       // attach request so we have to do an arbitrary sleep.
       Thread.sleep(5000);
       HotSpotVirtualMachine vm = (HotSpotVirtualMachine)VirtualMachine.attach(((Integer)pid).toString());
       BufferedReader remoteDataReader = new BufferedReader(new InputStreamReader(vm.remoteDataDump()));
       String line = null;
       while((line = remoteDataReader.readLine()) != null);
       vm.detach();
       return true;
     }
     finally {
       target.destroy();
       target.waitFor();
       if(pidFile != null && Files.exists(pidFile)) {
         Files.delete(pidFile);
       }
     }
   }
   private static Path createJavaPidFile(int pid) throws Exception {
     Path pidFile = Paths.get("/tmp/.java_pid" + pid);
     if(Files.exists(pidFile)) {
       try {
         Files.delete(pidFile);
       }
       catch(FileSystemException e) {
         if(e.getReason().equals("Operation not permitted")) {
           System.out.println("Unable to remove exisiting stale PID file" + pidFile);
           return null;
         }
         throw e;
       }
     }
     return Files.createFile(pidFile,
       PosixFilePermissions.asFileAttribute(PosixFilePermissions.fromString("rw-------")));
   }
   private static void waitForAndResumeVM(int pid) throws Exception {
     Path pauseFile = Paths.get("vm.paused." + pid);
     int retries = 60;
     while(!Files.exists(pauseFile) && --retries > 0) {
       Thread.sleep(1000);
     }
     if(retries == 0) {
       throw new RuntimeException("Timeout waiting for VM to start. " +
         "vm.paused file not created within 60 seconds.");
     }
     Files.delete(pauseFile);
   }
   private static int getUnixProcessId(Process unixProcess) throws Exception {
     Field pidField = unixProcess.getClass().getDeclaredField("pid");
     pidField.setAccessible(true);
     return (Integer)pidField.get(unixProcess);
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

test/serviceability/attach/AttachWithStalePidFile.java@09f19d3de485 (annotated)

test/serviceability/attach/AttachWithStalePidFile.java