Mercurial > hg > graal-compiler
view test/testlibrary/com/oracle/java/testlibrary/InputArguments.java @ 15419:f093fa76e872
made note about workaround for JDK-8041628
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 29 Apr 2014 14:26:39 +0200 |
parents | 73d0d0218068 |
children |
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/* * 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. */ package com.oracle.java.testlibrary; import java.lang.management.RuntimeMXBean; import java.lang.management.ManagementFactory; import java.util.List; /** * This class provides access to the input arguments to the VM. */ public class InputArguments { private static final List<String> args; static { RuntimeMXBean runtimeMxBean = ManagementFactory.getRuntimeMXBean(); args = runtimeMxBean.getInputArguments(); } /** * Returns true if {@code arg} is an input argument to the VM. * * This is useful for checking boolean flags such as -XX:+UseSerialGC or * -XX:-UsePerfData. * * @param arg The name of the argument. * @return {@code true} if the given argument is an input argument, * otherwise {@code false}. */ public static boolean contains(String arg) { return args.contains(arg); } /** * Returns true if {@code prefix} is the start of an input argument to the * VM. * * This is useful for checking if flags describing a quantity, such as * -XX:+MaxMetaspaceSize=100m, is set without having to know the quantity. * To check if the flag -XX:MaxMetaspaceSize is set, use * {@code InputArguments.containsPrefix("-XX:MaxMetaspaceSize")}. * * @param prefix The start of the argument. * @return {@code true} if the given argument is the start of an input * argument, otherwise {@code false}. */ public static boolean containsPrefix(String prefix) { for (String arg : args) { if (arg.startsWith(prefix)) { return true; } } return false; } }