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

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * accompanied this code).
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package jdk.jfr.event.gc.detailed;

import jdk.test.lib.jfr.AppExecutorHelper;
import jdk.test.lib.process.OutputAnalyzer;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class ExecuteOOMApp {
    /**
     * Executes OOM application with JFR recording and returns true if OOM error happened in the
     * test thread. Adds -XX:-UseGCOverheadLimit option to avoid "java.lang.OutOfMemoryError: GC overhead limit exceeded".
     *
     * @param settings JFR settings file
     * @param jfrFilename JFR resulting recording filename
     * @param additionalVmFlags additional VM flags passed to the java
     * @param bytesToAllocate number of bytes to allocate in new object every cycle in OOM application
     * @return true - OOM application is finished as expected,i.e. OOM happened in the test thead
     *         false - OOM application is finished with OOM error which happened in the non test thread
     */
    public static boolean execute(String settings, String jfrFilename, String[] additionalVmFlags, int bytesToAllocate) throws Exception {
        List<String> additionalVmFlagsList = new ArrayList<>(Arrays.asList(additionalVmFlags));
        additionalVmFlagsList.add("-XX:-UseGCOverheadLimit");

        OutputAnalyzer out = AppExecutorHelper.executeAndRecord(settings, jfrFilename, additionalVmFlagsList.toArray(new String[0]),
                                                                OOMApp.class.getName(), String.valueOf(bytesToAllocate));

        if ((out.getExitValue() == 1 && out.getOutput().contains("java.lang.OutOfMemoryError"))) {
            return false;
        }

        out.shouldHaveExitValue(0);
        System.out.println(out.getOutput());

        return true;
    }
}