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 *
48 * @library /lib /
49 *
50 * @build sun.hotspot.WhiteBox
51 * @run main ClassFileInstaller sun.hotspot.WhiteBox
52 * sun.hotspot.WhiteBox$WhiteBoxPermission
53 * @run main/othervm -Xbootclasspath/a:.
54 * -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
55 * -XX:CompileOnly=jdk.jfr.event.compiler.TestCodeSweeperStats::dummyMethod
56 * -XX:+SegmentedCodeCache jdk.jfr.event.compiler.TestCodeSweeperStats
57 * @run main/othervm -Xbootclasspath/a:.
58 * -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
59 * -XX:CompileOnly=jdk.jfr.event.compiler.TestCodeSweeperStats::dummyMethod
60 * -XX:-SegmentedCodeCache jdk.jfr.event.compiler.TestCodeSweeperStats
61 */
62 public class TestCodeSweeperStats {
63 private static final String EVENT_NAME = EventNames.CodeSweeperStatistics;
64 private static final int WAIT_TIME = 10_000;
65 private static final String CLASS_METHOD_TO_COMPILE = "dummyMethod";
66 private static final int METHODS_TO_COMPILE = Integer.getInteger("compile.methods.count", 10);
67 private static final int COMP_LEVEL_SIMPLE = 1;
68 private static final int COMP_LEVEL_FULL_OPTIMIZATION = 4;
69
70 public static void main(String[] args) throws Exception {
71 Recording recording = new Recording();
72 recording.enable(EVENT_NAME).with("period", "endChunk");
73 recording.start();
74 compileAndSweep();
75 recording.stop();
76
77 List<RecordedEvent> events = Events.fromRecording(recording);
78 Events.hasEvents(events);
79 for (RecordedEvent event : events) {
80 Events.assertField(event, "sweepCount").atLeast(1);
81 Events.assertField(event, "methodReclaimedCount").equal(METHODS_TO_COMPILE);
82 Events.assertField(event, "totalSweepTime").atLeast(0L);
83 Events.assertField(event, "peakFractionTime").atLeast(0L);
84 Events.assertField(event, "peakSweepTime").atLeast(0L);
85 }
86 }
87
88 private static void compileAndSweep() throws InterruptedException {
89 WhiteBox WB = WhiteBox.getWhiteBox();
90 for (int i = 0; i < METHODS_TO_COMPILE; i++) {
91 System.out.println("compile " + i);
92 compileMethod();
93 }
94
95 WB.deoptimizeAll();
96 System.out.println("All methods deoptimized");
97
98 // method will be sweeped out of code cache after 5 sweep cycles
99 for (int i = 0; i < 5; i++) {
100 WB.fullGC();
101 WB.forceNMethodSweep();
102
103 }
104 // now wait for event(s) to be fired
105 Thread.sleep(WAIT_TIME);
106 }
107
108 public void dummyMethod() {
109 System.out.println("Hello World!");
110 }
111
112 protected static void compileMethod() {
113 ClassLoader current = TestCodeSweeperStats.class.getClassLoader();
114 String[] cpaths = System.getProperty("test.classes", ".").split(File.pathSeparator);
115 URL[] urls = new URL[cpaths.length];
116 try {
117 for (int i = 0; i < cpaths.length; i++) {
118 urls[i] = Paths.get(cpaths[i]).toUri().toURL();
119 }
120 } catch (MalformedURLException e) {
121 throw new Error(e);
122 }
123
124 String currentClassName = TestCodeSweeperStats.class.getName();
125 FilterClassLoader cl = new FilterClassLoader(new ParentLastURLClassLoader(urls, current), ClassLoader.getSystemClassLoader(), (name) -> currentClassName.equals(name));
126 Class<?> loadedClass = null;
127 String className = currentClassName;
128 try {
129 loadedClass = cl.loadClass(className);
130 } catch (ClassNotFoundException ex) {
131 throw new Error("Couldn't load class " + className, ex);
132 }
133 try {
134 Method mtd = loadedClass.getMethod(CLASS_METHOD_TO_COMPILE);
135 WhiteBox WB = WhiteBox.getWhiteBox();
136 WB.testSetDontInlineMethod(mtd, true);
137 String directive = "[{ match: \"" + TestCodeSweeperStats.class.getName().replace('.', '/')
138 + "." + CLASS_METHOD_TO_COMPILE + "\", " + "BackgroundCompilation: false }]";
139 WB.addCompilerDirective(directive);
140 if (!WB.enqueueMethodForCompilation(mtd, COMP_LEVEL_FULL_OPTIMIZATION)) {
141 WB.enqueueMethodForCompilation(mtd, COMP_LEVEL_SIMPLE);
142 }
143 Utils.waitForCondition(() -> WB.isMethodCompiled(mtd));
144 } catch (NoSuchMethodException e) {
145 throw new Error("An exception while trying compile method " + e.getMessage(), e);
146 }
147 }
148 }