| /* |
| * Copyright (c) 2014, 2017, 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. |
| */ |
| |
| /** |
| * @test SpaceUtilizationCheck |
| * @requires vm.cds |
| * @summary Check if the space utilization for shared spaces is adequate |
| * @requires (vm.opt.UseCompressedOops == null) | (vm.opt.UseCompressedOops == true) |
| * @library /test/lib |
| * @modules java.base/jdk.internal.misc |
| * java.management |
| * @build sun.hotspot.WhiteBox |
| * @run main ClassFileInstaller sun.hotspot.WhiteBox |
| * sun.hotspot.WhiteBox$WhiteBoxPermission |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI SpaceUtilizationCheck |
| */ |
| |
| import jdk.test.lib.cds.CDSTestUtils; |
| import jdk.test.lib.process.OutputAnalyzer; |
| import sun.hotspot.WhiteBox; |
| |
| import java.util.regex.Pattern; |
| import java.util.regex.Matcher; |
| import java.util.ArrayList; |
| import java.util.Hashtable; |
| import java.lang.Integer; |
| |
| public class SpaceUtilizationCheck { |
| // [1] Each region must have strictly less than |
| // WhiteBox.metaspaceReserveAlignment() bytes of unused space. |
| // [2] There must be no gap between two consecutive regions. |
| |
| public static void main(String[] args) throws Exception { |
| // (1) Default VM arguments |
| test(); |
| |
| // (2) Use the now deprecated VM arguments. They should have no effect. |
| test("-XX:SharedReadWriteSize=128M", |
| "-XX:SharedReadOnlySize=128M", |
| "-XX:SharedMiscDataSize=128M", |
| "-XX:SharedMiscCodeSize=128M"); |
| } |
| |
| static void test(String... extra_options) throws Exception { |
| OutputAnalyzer output = CDSTestUtils.createArchive(extra_options); |
| CDSTestUtils.checkDump(output); |
| Pattern pattern = Pattern.compile("^(..) space: *([0-9]+).* out of *([0-9]+) bytes .* at 0x([0-9a0-f]+)"); |
| WhiteBox wb = WhiteBox.getWhiteBox(); |
| long reserve_alignment = wb.metaspaceReserveAlignment(); |
| System.out.println("Metaspace::reserve_alignment() = " + reserve_alignment); |
| |
| long last_region = -1; |
| Hashtable<String,String> checked = new Hashtable<>(); |
| for (String line : output.getStdout().split("\n")) { |
| if (line.contains(" space:") && !line.contains("st space:")) { |
| Matcher matcher = pattern.matcher(line); |
| if (matcher.find()) { |
| String name = matcher.group(1); |
| if (name.equals("s0") || name.equals("s1")) { |
| // String regions are listed at the end and they may not be fully occupied. |
| break; |
| } else { |
| System.out.println("Checking " + name + " in : " + line); |
| checked.put(name, name); |
| } |
| long used = Long.parseLong(matcher.group(2)); |
| long capacity = Long.parseLong(matcher.group(3)); |
| long address = Long.parseLong(matcher.group(4), 16); |
| long unused = capacity - used; |
| if (unused < 0) { |
| throw new RuntimeException("Unused space (" + unused + ") less than 0"); |
| } |
| if (unused > reserve_alignment) { |
| // [1] Check for unused space |
| throw new RuntimeException("Unused space (" + unused + ") must be smaller than Metaspace::reserve_alignment() (" + |
| reserve_alignment + ")"); |
| } |
| if (last_region >= 0 && address != last_region) { |
| // [2] Check for no-gap |
| throw new RuntimeException("Region 0x" + address + " should have started at 0x" + Long.toString(last_region, 16)); |
| } |
| last_region = address + capacity; |
| } |
| } |
| } |
| if (checked.size() != 5) { |
| throw new RuntimeException("Must have 5 consecutive, fully utilized regions"); |
| } |
| } |
| } |