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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.Asserts;
import sun.hotspot.WhiteBox;
/* @test TestMetaspaceCMSCancel
* @bug 8026752
* @summary Tests cancel of CMS concurrent cycle for Metaspace after a full GC
* @library /test/lib
* @modules java.base/jdk.internal.misc
* @build sun.hotspot.WhiteBox
* @run main ClassFileInstaller sun.hotspot.WhiteBox
* @run main/othervm TestMetaspaceCMSCancel
*/
public class TestMetaspaceCMSCancel {
public static void main(String[] args) throws Exception {
// Set a small MetaspaceSize so that a CMS concurrent collection will be
// scheduled. Set CMSWaitDuration to 5s so that the concurrent collection
// start may be delayed. It does not guarantee 5s before the start of the
// concurrent collection but does increase the probability that it will
// be started later. System.gc() is used to invoke a full collection. Set
// ExplicitGCInvokesConcurrent to off so it is a STW collection.
ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xbootclasspath/a:.",
"-XX:+UnlockDiagnosticVMOptions",
"-XX:+WhiteBoxAPI",
"-XX:+UseConcMarkSweepGC",
"-XX:MetaspaceSize=2m",
"-XX:CMSWaitDuration=5000",
"-XX:-ExplicitGCInvokesConcurrent",
"-Xlog:gc*=debug",
MetaspaceGCTest.class.getName());
OutputAnalyzer output = new OutputAnalyzer(pb.start());
output.shouldNotContain("Concurrent Reset");
output.shouldHaveExitValue(0);
}
static class MetaspaceGCTest {
public static void main(String [] args) {
WhiteBox wb = WhiteBox.getWhiteBox();
System.gc();
Asserts.assertFalse(wb.metaspaceShouldConcurrentCollect());
}
}
}