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/*
* Copyright (c) 2013, 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 TestPrintClassHistogram
* @bug 8010294
* @summary Checks that a class histogram can be printed both before and after
* a GC
* @library /testlibrary
* @run main/othervm TestPrintClassHistogram launch BeforeGC
* @run main/othervm TestPrintClassHistogram launch AfterGC
* @run main/othervm TestPrintClassHistogram launch BeforeGC AfterGC
*/
import java.util.List;
import java.util.ArrayList;
import java.util.Arrays;
import com.oracle.java.testlibrary.OutputAnalyzer;
import com.oracle.java.testlibrary.ProcessTools;
/* This test uses a "trick" to be able to analyze the output of the test:
*
* The test starts a java process that runs the same code, but the first
* argument is different ("run" instead of "launch"). The change of flags
* will run the test code instead of launching the test again.
*/
public class TestPrintClassHistogram {
public static void main(String[] args) throws Exception {
if (shouldLaunchTest(args)) {
launchTest(args);
return;
}
// This is the actual test code
System.gc();
}
private static boolean shouldLaunchTest(String[] cmdlineArguments) {
return cmdlineArguments[0].equals("launch");
}
private static void launchTest(String[] args) throws Exception {
String[] testArgs = createTestArguments(args);
ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(testArgs);
OutputAnalyzer output = new OutputAnalyzer(pb.start());
output.shouldNotContain("WARNING");
// There will always be at least one java.lang.Class instance
output.shouldContain("java.lang.Class");
// There will always be at least one java.lang.String instance
output.shouldContain("java.lang.String");
output.shouldHaveExitValue(0);
}
private static String[] createTestArguments(String[] cmdlineArguments) {
List<String> cmdlineArgs = Arrays.asList(cmdlineArguments);
List<String> testArgs = new ArrayList<String>();
if (cmdlineArgs.contains("BeforeGC")) {
testArgs.add("-XX:+PrintClassHistogramBeforeFullGC");
}
if (cmdlineArgs.contains("AfterGC")) {
testArgs.add("-XX:+PrintClassHistogramAfterFullGC");
}
testArgs.add("TestPrintClassHistogram");
testArgs.add("run");
return testArgs.toArray(new String[testArgs.size()]);
}
}
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