test/hotspot/jtreg/runtime/jni/checked/TestCheckedReleaseCriticalArray.java

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/* @test
 * @bug 8193234 8258077
 * @summary Check ReleasePrimitiveArrayCritical doesn't leak memory with
 * Xcheck:jni and JNI_COMMIT mode
 * @comment This is a manual test as you need to verify memory usage externally.
 * @library /test/lib
 * @run main/othervm/native/manual -Xms4m -Xmx4m -Xcheck:jni TestCheckedReleaseCriticalArray
 */
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
import jtreg.SkippedException;

public class TestCheckedReleaseCriticalArray {

    static {
        System.loadLibrary("TestCheckedReleaseCriticalArray");
    }

    /*
     * We repeatedly modify an array via the JNI critical functions, using
     * JNI_COMMIT mode. No memory leak should be observed on a VM that
     * provides direct array access.
     */
    public static void main(String[] args) {
        int[] array = new int[] { 1, 2, 3 };
        if (!modifyArray(array)) {
            // If the VM makes copies then we will leak them if we only ever use
            // JNI_COMMIT mode.
            throw new SkippedException("Test skipped as GetPrimitiveArrayCritical made a copy");
        }
        while (true) {
            modifyArray(array);
        }
    }

    private static native boolean modifyArray(int[] array);
}