Mercurial > hg > truffle
diff 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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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/serviceability/sa/jmap-hprof/JMapHProfLargeHeapProc.java Fri Oct 04 13:44:49 2013 +0200 @@ -0,0 +1,71 @@ +/* + * 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. + */ + +import java.lang.management.ManagementFactory; +import java.lang.management.RuntimeMXBean; +import java.lang.reflect.Field; +import java.lang.reflect.Method; +import java.util.ArrayList; +import java.util.List; + +import sun.management.VMManagement; + +public class JMapHProfLargeHeapProc { + private static final List<byte[]> heapGarbage = new ArrayList<>(); + + public static void main(String[] args) throws Exception { + + buildLargeHeap(args); + + // Print our pid on stdout + System.out.println("PID[" + getProcessId() + "]"); + + // Wait for input before termination + System.in.read(); + } + + private static void buildLargeHeap(String[] args) { + for (long i = 0; i < Integer.parseInt(args[0]); i++) { + heapGarbage.add(new byte[1024]); + } + } + + public static int getProcessId() throws Exception { + + // Get the current process id using a reflection hack + RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean(); + Field jvm = runtime.getClass().getDeclaredField("jvm"); + + jvm.setAccessible(true); + VMManagement mgmt = (sun.management.VMManagement) jvm.get(runtime); + + Method pid_method = mgmt.getClass().getDeclaredMethod("getProcessId"); + + pid_method.setAccessible(true); + + int pid = (Integer) pid_method.invoke(mgmt); + + return pid; + } + +}