116 lines
4.3 KiB
Java
116 lines
4.3 KiB
Java
/*
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* Copyright (c) 2018, 2023, 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 8195100
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* @summary a short lived Symbol should be cleaned up
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* @requires vm.debug
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* @requires vm.flagless
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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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* @run driver ShortLivedSymbolCleanup
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*/
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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import java.util.Scanner;
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public class ShortLivedSymbolCleanup {
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static int getSymbolTableSize(ProcessBuilder pb) throws Exception {
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int size = 0;
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OutputAnalyzer analyzer = new OutputAnalyzer(pb.start());
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String output = analyzer.getStdout();
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analyzer.shouldHaveExitValue(0);
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// Split string into lines using platform independent end of line marker.
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String[] lines = output.split("\\R");
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for (String line : lines) {
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if (line.contains("Start size")) {
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// ex. "[0.023s][trace][symboltable] Start size: 32768 (15)"
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Scanner scanner = new Scanner(line);
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scanner.next(); // skip "[0.023s][trace][symboltable]"
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scanner.next(); // skip "Start"
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scanner.next(); // skip "size:"
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size = Integer.parseInt(scanner.next()); // process "32768"
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scanner.close();
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}
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}
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return size;
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}
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static void analyzeOutputOn(int size, ProcessBuilder pb) throws Exception {
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OutputAnalyzer analyzer = new OutputAnalyzer(pb.start());
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String output = analyzer.getStdout();
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analyzer.shouldHaveExitValue(0);
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// Split string into lines using platform independent end of line marker.
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String[] lines = output.split("\\R");
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for (String line : lines) {
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if (line.startsWith(" Total removed")) {
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// ex. "Total removed 13309"
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Scanner scanner = new Scanner(line);
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scanner.next(); // skip "Total"
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scanner.next(); // skip "removed"
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int removed = Integer.parseInt(scanner.next()); // process "13309"
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scanner.close();
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if (removed < (size/2)) {
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System.out.println(output);
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// We should have removed at least half of the temporary Symbols
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throw new RuntimeException("Did not clean dead temporary Symbols [removed:"+removed+", size:"+size+"]");
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}
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}
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}
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}
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public static void main(String[] args) throws Exception {
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder("-Xlog:symboltable=trace",
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"-version");
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int size = getSymbolTableSize(pb);
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pb = ProcessTools.createLimitedTestJavaProcessBuilder("-XX:+PrintSymbolTableSizeHistogram",
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LotsOfTempSymbols.class.getName(),
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Integer.toString(size));
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analyzeOutputOn(size, pb);
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}
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static class LotsOfTempSymbols {
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public static void main(String [] args) {
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int size = 2*Integer.parseInt(args[0]);
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// Create enough temporary Symbols, that we are
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// guranteed to insert into every bucket twice,
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// and therefore have the table check for dead entries
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for (int i=0; i<size; i++) {
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try {
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Class.forName(String.format("%05d", i), false, null);
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} catch (java.lang.ClassNotFoundException e) {}
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}
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}
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}
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}
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