108 lines
3.6 KiB
Java
108 lines
3.6 KiB
Java
/*
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* Copyright (c) 2017, 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 8184765
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* @summary make sure the SystemDictionary gets resized when load factor is too high
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* java.management
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* @compile TriggerResize.java
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* @requires (vm.debug == true)
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* @run driver TestResize
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*/
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import jdk.test.lib.Platform;
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import jdk.test.lib.process.ProcessTools;
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import java.io.BufferedReader;
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import java.io.InputStreamReader;
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import java.lang.Process;
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import java.lang.ProcessBuilder;
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import java.util.Scanner;
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public class TestResize {
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static double MAX_LOAD_FACTOR = 5.0; // see _resize_load_trigger in dictionary.cpp
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static int getInt(String string) {
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int start = 0;
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for (int i = 0; i < string.length(); i++) {
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if (!Character.isDigit(string.charAt(i))) {
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start++;
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} else {
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break;
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}
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}
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int end = start;
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for (int i = end; i < string.length(); i++) {
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if (Character.isDigit(string.charAt(i))) {
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end++;
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} else {
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break;
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}
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}
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return Integer.parseInt(string.substring(start, end));
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}
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static void analyzeOutputOn(ProcessBuilder pb) throws Exception {
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pb.redirectErrorStream(true);
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Process process = pb.start();
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BufferedReader rd = new BufferedReader(new InputStreamReader(process.getInputStream()));
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String line = rd.readLine();
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while (line != null) {
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if (line.startsWith("Java dictionary (")) {
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// ex. "Java dictionary (table_size=107, classes=6)"
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// ex. "Java dictionary (table_size=20201, classes=50002)"
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Scanner scanner = new Scanner(line);
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scanner.next();
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scanner.next();
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int table_size = getInt(scanner.next());
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int classes = getInt(scanner.next());
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scanner.close();
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double loadFactor = (double)classes / (double)table_size;
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if (loadFactor > MAX_LOAD_FACTOR) {
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throw new RuntimeException("Load factor too high, expected MAX "+MAX_LOAD_FACTOR+", got "+loadFactor);
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} else {
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System.out.println("PASS table_size:"+table_size+", classes:"+classes+" OK");
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}
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}
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line = rd.readLine();
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}
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int retval = process.waitFor();
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if (retval != 0) {
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throw new RuntimeException("Error: test returned non-zero value");
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}
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}
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public static void main(String[] args) throws Exception {
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if (Platform.isDebugBuild()) {
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ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+PrintSystemDictionaryAtExit",
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"TriggerResize",
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"50000");
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analyzeOutputOn(pb);
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}
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}
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}
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