d3094c0e8c
Adds support for large(>4G) heap dumps in hprof format. Adds tests and updates testlibrary. Reviewed-by: sla, allwin
72 lines
2.4 KiB
Java
72 lines
2.4 KiB
Java
/*
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* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.lang.management.ManagementFactory;
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import java.lang.management.RuntimeMXBean;
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import java.lang.reflect.Field;
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import java.lang.reflect.Method;
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import java.util.ArrayList;
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import java.util.List;
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import sun.management.VMManagement;
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public class JMapHProfLargeHeapProc {
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private static final List<byte[]> heapGarbage = new ArrayList<>();
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public static void main(String[] args) throws Exception {
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buildLargeHeap(args);
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// Print our pid on stdout
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System.out.println("PID[" + getProcessId() + "]");
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// Wait for input before termination
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System.in.read();
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}
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private static void buildLargeHeap(String[] args) {
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for (long i = 0; i < Integer.parseInt(args[0]); i++) {
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heapGarbage.add(new byte[1024]);
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}
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}
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public static int getProcessId() throws Exception {
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// Get the current process id using a reflection hack
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RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
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Field jvm = runtime.getClass().getDeclaredField("jvm");
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jvm.setAccessible(true);
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VMManagement mgmt = (sun.management.VMManagement) jvm.get(runtime);
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Method pid_method = mgmt.getClass().getDeclaredMethod("getProcessId");
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pid_method.setAccessible(true);
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int pid = (Integer) pid_method.invoke(mgmt);
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return pid;
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}
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}
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