94 lines
3.3 KiB
Java
94 lines
3.3 KiB
Java
/*
|
|
* Copyright (c) 2015, 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.
|
|
*/
|
|
|
|
import org.testng.annotations.Test;
|
|
|
|
import java.util.regex.Pattern;
|
|
|
|
import jdk.test.lib.OutputAnalyzer;
|
|
import jdk.test.lib.dcmd.CommandExecutor;
|
|
import jdk.test.lib.dcmd.JMXExecutor;
|
|
|
|
/*
|
|
* @test
|
|
* @summary Test of diagnostic command GC.class_histogram
|
|
* @library /testlibrary
|
|
* @modules java.base/sun.misc
|
|
* java.compiler
|
|
* java.management
|
|
* jdk.jvmstat/sun.jvmstat.monitor
|
|
* @build jdk.test.lib.*
|
|
* @build jdk.test.lib.dcmd.*
|
|
* @run testng ClassHistogramTest
|
|
*/
|
|
public class ClassHistogramTest {
|
|
public static class TestClass {}
|
|
public static TestClass[] instances = new TestClass[1024];
|
|
protected String classHistogramArgs = "";
|
|
|
|
static {
|
|
for (int i = 0; i < instances.length; ++i) {
|
|
instances[i] = new TestClass();
|
|
}
|
|
}
|
|
|
|
public void run(CommandExecutor executor) {
|
|
OutputAnalyzer output = executor.execute("GC.class_histogram " + classHistogramArgs);
|
|
|
|
/*
|
|
* example output:
|
|
* num #instances #bytes class name
|
|
* ----------------------------------------------
|
|
* 1: 1647 1133752 [B
|
|
* 2: 6198 383168 [C
|
|
* 3: 1464 165744 java.lang.Class
|
|
* 4: 6151 147624 java.lang.String
|
|
* 5: 2304 73728 java.util.concurrent.ConcurrentHashMap$Node
|
|
* 6: 1199 64280 [Ljava.lang.Object;
|
|
* ...
|
|
*/
|
|
|
|
/* Require at least one java.lang.Class */
|
|
output.shouldMatch("^\\s+\\d+:\\s+\\d+\\s+\\d+\\s+java.lang.Class\\s*$");
|
|
|
|
/* Require at least one java.lang.String */
|
|
output.shouldMatch("^\\s+\\d+:\\s+\\d+\\s+\\d+\\s+java.lang.String\\s*$");
|
|
|
|
/* Require at least one java.lang.Object */
|
|
output.shouldMatch("^\\s+\\d+:\\s+\\d+\\s+\\d+\\s+java.lang.Object\\s*$");
|
|
|
|
/* Require at exactly one TestClass[] */
|
|
output.shouldMatch("^\\s+\\d+:\\s+1\\s+\\d+\\s+" +
|
|
Pattern.quote(TestClass[].class.getName()) + "\\s*$");
|
|
|
|
/* Require at exactly 1024 TestClass */
|
|
output.shouldMatch("^\\s+\\d+:\\s+1024\\s+\\d+\\s+" +
|
|
Pattern.quote(TestClass.class.getName()) + "\\s*$");
|
|
}
|
|
|
|
@Test
|
|
public void jmx() {
|
|
run(new JMXExecutor());
|
|
}
|
|
}
|