test/jdk/jdk/jfr/event/gc/detailed/PromotionFailedEvent.java

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 * accompanied this code).
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package jdk.jfr.event.gc.detailed;

import java.io.File;
import java.nio.file.Paths;
import java.util.List;

import jdk.jfr.consumer.RecordedEvent;
import jdk.jfr.consumer.RecordingFile;
import jdk.test.lib.Asserts;
import jdk.test.lib.jfr.Events;

public class PromotionFailedEvent {

    private final static String EVENT_SETTINGS_FILE = System.getProperty("test.src", ".") + File.separator + "promotionfailed-testsettings.jfc";
    private final static int BYTES_TO_ALLOCATE = 1024;

    public static void test(String testName, String[] vmFlags) throws Throwable {
        String jfr_file = testName + ".jfr";

        if (!ExecuteOOMApp.execute(EVENT_SETTINGS_FILE, jfr_file, vmFlags, BYTES_TO_ALLOCATE)) {
            System.out.println("OOM happened in the other thread(not test thread). Skip test.");
            // Skip test, process terminates due to the OOME error in the different thread
            return;
        }

        // This test can not always trigger the expected event.
        // Test is ok even if no events found.
        List<RecordedEvent> events = RecordingFile.readAllEvents(Paths.get(jfr_file));
        for (RecordedEvent event : events) {
            System.out.println("Event: " + event);
            long smallestSize = Events.assertField(event, "promotionFailed.smallestSize").atLeast(1L).getValue();
            long firstSize = Events.assertField(event, "promotionFailed.firstSize").atLeast(smallestSize).getValue();
            long totalSize = Events.assertField(event, "promotionFailed.totalSize").atLeast(firstSize).getValue();
            long objectCount = Events.assertField(event, "promotionFailed.objectCount").atLeast(1L).getValue();
            Asserts.assertLessThanOrEqual(smallestSize * objectCount, totalSize, "smallestSize * objectCount <= totalSize");
        }
    }
}