Mercurial > hg > graal-jvmci-8
comparison test/serviceability/sa/jmap-hprof/JMapHProfLargeHeapProc.java @ 12820:8ef918538e22
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
author | sla |
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date | Fri, 04 Oct 2013 13:44:49 +0200 |
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12818:763705f0fec3 | 12820:8ef918538e22 |
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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 */ | |
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 } |