author | ykantser |
Mon, 04 May 2015 16:30:07 +0200 | |
changeset 30604 | b8d532cb6420 |
parent 29678 | dd2f3932c21e |
child 31330 | 77061bb01b18 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2014, 2015, 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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/* |
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* @test |
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* @bug 8054823 |
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* @summary Tests the setFlag and printFlag attach command |
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* @library /testlibrary |
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* @modules java.base/sun.misc |
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* java.compiler |
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* java.management |
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* jdk.attach/sun.tools.attach |
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* jdk.jvmstat/sun.jvmstat.monitor |
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* @build jdk.test.lib.* AttachSetGetFlag |
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* @run driver AttachSetGetFlag |
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*/ |
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import java.io.BufferedReader; |
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import java.io.InputStreamReader; |
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import java.io.InputStream; |
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import java.lang.reflect.Field; |
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import java.nio.file.Files; |
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import java.nio.file.Path; |
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import java.nio.file.Paths; |
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import sun.tools.attach.HotSpotVirtualMachine; |
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import jdk.test.lib.Asserts; |
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import jdk.test.lib.Platform; |
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import jdk.test.lib.ProcessTools; |
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import com.sun.tools.attach.VirtualMachine; |
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public class AttachSetGetFlag { |
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public static void main(String... args) throws Exception { |
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// Test a manageable uintx flag. |
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testGetFlag("MaxHeapFreeRatio", "60"); |
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testSetFlag("MaxHeapFreeRatio", "50", "60"); |
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// Test a non-manageable size_t flag. |
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// Since it is not manageable, we can't test the setFlag functionality. |
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testGetFlag("ArrayAllocatorMallocLimit", "128"); |
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// testSetFlag("ArrayAllocatorMallocLimit", "64", "128"); |
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} |
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public static ProcessBuilder runTarget(String flagName, String flagValue) throws Exception { |
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return ProcessTools.createJavaProcessBuilder( |
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"-XX:+UnlockExperimentalVMOptions", |
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"-XX:" + flagName + "=" + flagValue, |
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"AttachSetGetFlag$Target"); |
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} |
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public static void testGetFlag(String flagName, String flagValue) throws Exception { |
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ProcessBuilder pb = runTarget(flagName, flagValue); |
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Process target = pb.start(); |
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try { |
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waitForReady(target); |
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int pid = (int)target.getPid(); |
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HotSpotVirtualMachine vm = (HotSpotVirtualMachine)VirtualMachine.attach(((Integer)pid).toString()); |
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// Test Get |
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BufferedReader remoteDataReader = new BufferedReader(new InputStreamReader( |
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vm.printFlag(flagName))); |
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boolean foundExpectedLine = false; |
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String line = null; |
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while((line = remoteDataReader.readLine()) != null) { |
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System.out.println("printFlag: " + line); |
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if (line.equals("-XX:" + flagName + "=" + flagValue)) { |
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foundExpectedLine = true; |
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} |
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} |
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Asserts.assertTrue(foundExpectedLine, "Didn't get the expected output: '-XX:" + flagName + "=" + flagValue + "'"); |
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vm.detach(); |
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} |
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finally { |
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target.destroy(); |
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target.waitFor(); |
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} |
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} |
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public static void testSetFlag(String flagName, String initialFlagValue, String flagValue) throws Exception { |
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ProcessBuilder pb = runTarget(flagName, initialFlagValue); |
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Process target = pb.start(); |
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try { |
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waitForReady(target); |
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int pid = (int)target.getPid(); |
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HotSpotVirtualMachine vm = (HotSpotVirtualMachine)VirtualMachine.attach(((Integer)pid).toString()); |
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// First set the value. |
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BufferedReader remoteDataReader = new BufferedReader(new InputStreamReader( |
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vm.setFlag(flagName, flagValue))); |
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String line; |
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while((line = remoteDataReader.readLine()) != null) { |
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System.out.println("setFlag: " + line); |
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// Just empty the stream. |
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} |
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remoteDataReader.close(); |
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// Then read and make sure we get back the set value. |
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remoteDataReader = new BufferedReader(new InputStreamReader(vm.printFlag(flagName))); |
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boolean foundExpectedLine = false; |
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line = null; |
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while((line = remoteDataReader.readLine()) != null) { |
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System.out.println("getFlag: " + line); |
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if (line.equals("-XX:" + flagName + "=" + flagValue)) { |
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foundExpectedLine = true; |
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} |
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} |
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Asserts.assertTrue(foundExpectedLine, "Didn't get the expected output: '-XX:" + flagName + "=" + flagValue + "'"); |
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vm.detach(); |
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} finally { |
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target.destroy(); |
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target.waitFor(); |
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} |
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} |
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private static void waitForReady(Process target) throws Exception { |
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InputStream os = target.getInputStream(); |
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try (BufferedReader reader = new BufferedReader(new InputStreamReader(os))) { |
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String line; |
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while ((line = reader.readLine()) != null) { |
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if ("Ready".equals(line)) { |
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return; |
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} |
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} |
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} |
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} |
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public static class Target { |
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public static void main(String [] args) throws Exception { |
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System.out.println("Ready"); |
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System.out.flush(); |
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while (true) { |
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Thread.sleep(1000); |
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} |
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} |
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} |
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} |