109 lines
4.0 KiB
Java
109 lines
4.0 KiB
Java
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/*
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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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/* @test
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* @bug 8022584
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* @summary Some NetworkInterface methods can leak native memory
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* @run main/othervm/timeout=700 MemLeakTest
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*/
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/* Note: the test can cause a memory leak that's why othervm option is required
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*/
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import java.io.BufferedReader;
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import java.io.FileReader;
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import java.net.NetworkInterface;
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import java.net.SocketException;
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import java.util.Collection;
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import java.util.Collections;
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public class MemLeakTest {
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/**
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* Memory leak is assumed, if application consumes more than specified amount of memory during its execution.
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* The number is given in Kb.
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*/
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private static final long MEM_LEAK_THRESHOLD = 32 * 1024; // 32Mb
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public static void main(String[] args)
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throws Exception {
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if (!System.getProperty("os.name").equals("Linux")) {
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System.out.println("Test only runs on Linux");
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return;
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}
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// warm up
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accessNetInterfaces(3);
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long vMemBefore = getVMemSize();
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accessNetInterfaces(500_000);
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long vMemAfter = getVMemSize();
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long vMemDelta = vMemAfter - vMemBefore;
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if (vMemDelta > MEM_LEAK_THRESHOLD) {
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throw new Exception("FAIL: Virtual memory usage increased by " + vMemDelta + "Kb " +
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"(greater than " + MEM_LEAK_THRESHOLD + "Kb)");
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}
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System.out.println("PASS: Virtual memory usage increased by " + vMemDelta + "Kb " +
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"(not greater than " + MEM_LEAK_THRESHOLD + "Kb)");
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}
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private static void accessNetInterfaces(int times) {
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try {
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Collection<NetworkInterface> interfaces =
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Collections.list(NetworkInterface.getNetworkInterfaces());
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for (int i = 0; i != times; ++i) {
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for (NetworkInterface netInterface : interfaces) {
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netInterface.getMTU();
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netInterface.isLoopback();
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netInterface.isUp();
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netInterface.isPointToPoint();
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netInterface.supportsMulticast();
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}
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}
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} catch (SocketException ignore) {}
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}
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/**
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* Returns size of virtual memory allocated to the process in Kb.
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* Linux specific. On other platforms and in case of any errors returns 0.
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*/
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private static long getVMemSize() {
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// Refer to the Linux proc(5) man page for details about /proc/self/stat file
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//
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// In short, this file contains status information about the current process
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// written in one line. The fields are separated with spaces.
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// The 23rd field is defined as 'vsize %lu Virtual memory size in bytes'
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try (FileReader fileReader = new FileReader("/proc/self/stat");
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BufferedReader bufferedReader = new BufferedReader(fileReader)) {
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String line = bufferedReader.readLine();
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return Long.parseLong(line.split(" ")[22]) / 1024;
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} catch (Exception ignore) {}
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return 0;
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}
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}
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