108 lines
4.7 KiB
Java
108 lines
4.7 KiB
Java
/*
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* Copyright (c) 2014, 2019, 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 SpaceUtilizationCheck
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* @summary Check if the space utilization for shared spaces is adequate
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* @requires vm.cds
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* @library /test/lib
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* @build sun.hotspot.WhiteBox
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* @run driver ClassFileInstaller sun.hotspot.WhiteBox
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* sun.hotspot.WhiteBox$WhiteBoxPermission
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI SpaceUtilizationCheck
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*/
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import jdk.test.lib.cds.CDSTestUtils;
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import jdk.test.lib.process.OutputAnalyzer;
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import sun.hotspot.WhiteBox;
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import java.util.regex.Pattern;
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import java.util.regex.Matcher;
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import java.util.ArrayList;
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import java.util.Hashtable;
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import java.lang.Integer;
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public class SpaceUtilizationCheck {
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// [1] Each region must have strictly less than
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// WhiteBox.metaspaceReserveAlignment() bytes of unused space.
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// [2] There must be no gap between two consecutive regions.
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public static void main(String[] args) throws Exception {
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// (1) Default VM arguments
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test();
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// (2) Use the now deprecated VM arguments. They should have no effect.
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test("-XX:SharedReadWriteSize=128M",
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"-XX:SharedReadOnlySize=128M",
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"-XX:SharedMiscDataSize=128M",
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"-XX:SharedMiscCodeSize=128M");
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}
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static void test(String... extra_options) throws Exception {
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OutputAnalyzer output = CDSTestUtils.createArchive(extra_options);
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CDSTestUtils.checkDump(output);
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Pattern pattern = Pattern.compile("^(..) *space: *([0-9]+).* out of *([0-9]+) bytes .* at 0x([0-9a0-f]+)");
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WhiteBox wb = WhiteBox.getWhiteBox();
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long reserve_alignment = wb.metaspaceReserveAlignment();
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System.out.println("Metaspace::reserve_alignment() = " + reserve_alignment);
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long last_region = -1;
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Hashtable<String,String> checked = new Hashtable<>();
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for (String line : output.getStdout().split("\n")) {
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if (line.contains(" space:") && !line.contains("st space:")) {
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Matcher matcher = pattern.matcher(line);
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if (matcher.find()) {
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String name = matcher.group(1);
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if (name.equals("bm")) {
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// Bitmap space does not have a requested address.
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break;
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} else {
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System.out.println("Checking " + name + " in : " + line);
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checked.put(name, name);
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}
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long used = Long.parseLong(matcher.group(2));
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long capacity = Long.parseLong(matcher.group(3));
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long address = Long.parseLong(matcher.group(4), 16);
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long unused = capacity - used;
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if (unused < 0) {
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throw new RuntimeException("Unused space (" + unused + ") less than 0");
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}
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if (unused > reserve_alignment) {
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// [1] Check for unused space
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throw new RuntimeException("Unused space (" + unused + ") must be smaller than Metaspace::reserve_alignment() (" +
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reserve_alignment + ")");
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}
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if (last_region >= 0 && address != last_region) {
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// [2] Check for no-gap
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throw new RuntimeException("Region 0x" + address + " should have started at 0x" + Long.toString(last_region, 16));
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}
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last_region = address + capacity;
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}
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}
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}
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if (checked.size() != 4) {
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throw new RuntimeException("Must have 4 consecutive, fully utilized regions");
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}
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}
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}
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