jdk8-mips64-public/hotspot: test/serviceability/sa/jmap-hprof/JMapHProfLargeHeapProc.java@8ef918538e22

6313383: SA: Update jmap to support HPROF binary format "JAVA PROFILE 1.0.2"
Summary: Adds support for large(>4G) heap dumps in hprof format. Adds tests and updates testlibrary.
Reviewed-by: sla, allwin
Contributed-by: fredrik.arvidsson@oracle.com

     1 /*

     2  * Copyright (c) 2013, 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  */

    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;

    31 import sun.management.VMManagement;

    33 public class JMapHProfLargeHeapProc {

    34     private static final List<byte[]> heapGarbage = new ArrayList<>();

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

    38         buildLargeHeap(args);

    40         // Print our pid on stdout

    41         System.out.println("PID[" + getProcessId() + "]");

    43         // Wait for input before termination

    44         System.in.read();

    45     }

    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     }

    53     public static int getProcessId() throws Exception {

    55         // Get the current process id using a reflection hack

    56         RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();

    57         Field jvm = runtime.getClass().getDeclaredField("jvm");

    59         jvm.setAccessible(true);

    60         VMManagement mgmt = (sun.management.VMManagement) jvm.get(runtime);

    62         Method pid_method = mgmt.getClass().getDeclaredMethod("getProcessId");

    64         pid_method.setAccessible(true);

    66         int pid = (Integer) pid_method.invoke(mgmt);

    68         return pid;

    69     }

    71 }

Mercurial > jdk8-mips64-public > hotspot / file revision

test/serviceability/sa/jmap-hprof/JMapHProfLargeHeapProc.java@8ef918538e22

test/serviceability/sa/jmap-hprof/JMapHProfLargeHeapProc.java