1 /*

     2  * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package jdk.jfr.event.compiler;

    27 

    28 import java.io.File;

    29 import java.lang.reflect.Method;

    30 import java.net.MalformedURLException;

    31 import java.net.URL;

    32 import java.nio.file.Paths;

    33 import java.util.List;

    34 

    35 import sun.hotspot.WhiteBox;

    36 import jdk.jfr.Recording;

    37 import jdk.jfr.consumer.RecordedEvent;

    38 import jdk.test.lib.classloader.FilterClassLoader;

    39 import jdk.test.lib.classloader.ParentLastURLClassLoader;

    40 import jdk.test.lib.jfr.EventNames;

    41 import jdk.test.lib.jfr.Events;

    42 import jdk.test.lib.Utils;

    43 

    44 /*

    45  * @test TestCodeSweeperStats

    46  * @key jfr

    47  * @library /test/lib

    48  * @requires vm.compMode!="Xint"

    49  * @build sun.hotspot.WhiteBox

    50  * @run main ClassFileInstaller sun.hotspot.WhiteBox

    51  *     sun.hotspot.WhiteBox$WhiteBoxPermission

    52  * @run main/othervm -Xbootclasspath/a:.

    53  *     -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI

    54  *     -XX:CompileOnly=jdk.jfr.event.compiler.TestCodeSweeperStats::dummyMethod

    55  *     -XX:+SegmentedCodeCache jdk.jfr.event.compiler.TestCodeSweeperStats

    56  * @run main/othervm -Xbootclasspath/a:.

    57  *     -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI

    58  *     -XX:CompileOnly=jdk.jfr.event.compiler.TestCodeSweeperStats::dummyMethod

    59  *     -XX:-SegmentedCodeCache jdk.jfr.event.compiler.TestCodeSweeperStats

    60  */

    61 public class TestCodeSweeperStats {

    62     private static final String EVENT_NAME = EventNames.CodeSweeperStatistics;

    63     private static final int WAIT_TIME = 10_000;

    64     private static final String CLASS_METHOD_TO_COMPILE = "dummyMethod";

    65     private static final int METHODS_TO_COMPILE = Integer.getInteger("compile.methods.count", 10);

    66     private static final int COMP_LEVEL_SIMPLE = 1;

    67     private static final int COMP_LEVEL_FULL_OPTIMIZATION = 4;

    68 

    69     public static void main(String[] args) throws Exception {

    70         Recording recording = new Recording();

    71         recording.enable(EVENT_NAME).with("period", "endChunk");

    72         recording.start();

    73         compileAndSweep();

    74         recording.stop();

    75 

    76         List<RecordedEvent> events = Events.fromRecording(recording);

    77         Events.hasEvents(events);

    78         for (RecordedEvent event : events) {

    79             Events.assertField(event, "sweepCount").atLeast(1);

    80             Events.assertField(event, "methodReclaimedCount").equal(METHODS_TO_COMPILE);

    81             Events.assertField(event, "totalSweepTime").atLeast(0L);

    82             Events.assertField(event, "peakFractionTime").atLeast(0L);

    83             Events.assertField(event, "peakSweepTime").atLeast(0L);

    84         }

    85     }

    86 

    87     private static void compileAndSweep() throws InterruptedException {

    88         WhiteBox WB = WhiteBox.getWhiteBox();

    89         for (int i = 0; i < METHODS_TO_COMPILE; i++) {

    90             System.out.println("compile " + i);

    91             compileMethod();

    92         }

    93 

    94         WB.deoptimizeAll();

    95         System.out.println("All methods deoptimized");

    96 

    97         // method will be sweeped out of code cache after 5 sweep cycles

    98         for (int i = 0; i < 5; i++) {

    99             WB.fullGC();

   100             WB.forceNMethodSweep();

   101 

   102         }

   103         // now wait for event(s) to be fired

   104         Thread.sleep(WAIT_TIME);

   105     }

   106 

   107     public void dummyMethod() {

   108         System.out.println("Hello World!");

   109     }

   110 

   111     protected static void compileMethod() {

   112         ClassLoader current = TestCodeSweeperStats.class.getClassLoader();

   113         String[] cpaths = System.getProperty("test.classes", ".").split(File.pathSeparator);

   114         URL[] urls = new URL[cpaths.length];

   115         try {

   116             for (int i = 0; i < cpaths.length; i++) {

   117                 urls[i] = Paths.get(cpaths[i]).toUri().toURL();

   118             }

   119         } catch (MalformedURLException e) {

   120             throw new Error(e);

   121         }

   122 

   123         String currentClassName = TestCodeSweeperStats.class.getName();

   124         FilterClassLoader cl = new FilterClassLoader(new ParentLastURLClassLoader(urls, current), ClassLoader.getSystemClassLoader(), (name) -> currentClassName.equals(name));

   125         Class<?> loadedClass = null;

   126         String className = currentClassName;

   127         try {

   128             loadedClass = cl.loadClass(className);

   129         } catch (ClassNotFoundException ex) {

   130             throw new Error("Couldn't load class " + className, ex);

   131         }

   132         try {

   133             Method mtd = loadedClass.getMethod(CLASS_METHOD_TO_COMPILE);

   134             WhiteBox WB = WhiteBox.getWhiteBox();

   135             WB.testSetDontInlineMethod(mtd, true);

   136             String directive = "[{ match: \"" + TestCodeSweeperStats.class.getName().replace('.', '/')

   137                     + "." + CLASS_METHOD_TO_COMPILE + "\", " + "BackgroundCompilation: false }]";

   138             WB.addCompilerDirective(directive);

   139             if (!WB.enqueueMethodForCompilation(mtd, COMP_LEVEL_FULL_OPTIMIZATION)) {

   140                 WB.enqueueMethodForCompilation(mtd, COMP_LEVEL_SIMPLE);

   141             }

   142             Utils.waitForCondition(() -> WB.isMethodCompiled(mtd));

   143         } catch (NoSuchMethodException e) {

   144             throw new Error("An exception while trying compile method " + e.getMessage(), e);

   145         }

   146     }

   147 }