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.lang.management.ManagementFactory;
  25 import java.lang.management.RuntimeMXBean;
  26 import java.lang.reflect.Field;
  27 import java.lang.reflect.Method;
  28 import java.util.ArrayList;
  29 import java.util.List;

  30 
  31 import sun.management.VMManagement;
  32 
  33 public class JMapHProfLargeHeapProc {
  34     private static final List<byte[]> heapGarbage = new ArrayList<>();
  35 
  36     public static void main(String[] args) throws Exception {
  37 
  38         buildLargeHeap(args);
  39 
  40         // Print our pid on stdout
  41         System.out.println("PID[" + getProcessId() + "]");
  42 
  43         // Wait for input before termination
  44         System.in.read();
  45     }
  46 
  47     private static void buildLargeHeap(String[] args) {
  48         for (long i = 0; i < Integer.parseInt(args[0]); i++) {
  49             heapGarbage.add(new byte[1024]);
  50         }
  51     }
  52 
  53     public static int getProcessId() throws Exception {
  54 
  55         // Get the current process id using a reflection hack
  56         RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
  57         Field jvm = runtime.getClass().getDeclaredField("jvm");
  58 
  59         jvm.setAccessible(true);
  60         VMManagement mgmt = (sun.management.VMManagement) jvm.get(runtime);
  61 
  62         Method pid_method = mgmt.getClass().getDeclaredMethod("getProcessId");
  63 
  64         pid_method.setAccessible(true);
  65 
  66         int pid = (Integer) pid_method.invoke(mgmt);
  67 
  68         return pid;
  69     }
  70 
  71 }

   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.util.ArrayList;
  25 import java.util.List;
  26 import jdk.test.lib.process.ProcessTools;
  27 
  28 import sun.management.VMManagement;
  29 
  30 public class JMapHProfLargeHeapProc {
  31     private static final List<byte[]> heapGarbage = new ArrayList<>();
  32 
  33     public static void main(String[] args) throws Exception {
  34 
  35         buildLargeHeap(args);
  36 
  37         // Print our pid on stdout
  38         System.out.println("PID[" + ProcessTools.getProcessId() + "]");
  39 
  40         // Wait for input before termination
  41         System.in.read();
  42     }
  43 
  44     private static void buildLargeHeap(String[] args) {
  45         for (long i = 0; i < Integer.parseInt(args[0]); i++) {
  46             heapGarbage.add(new byte[1024]);
  47         }
  48     }
  49 


















  50 }