WhiteBox.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test WhiteBox
 * @bug 8011675
 * @summary verify that whitebox can be used even if not all functions are declared in java-part
 * @author [email protected]
 * @modules java.base/jdk.internal.misc
 * @library /test/lib
 * @compile WhiteBox.java
 * @run driver jdk.test.lib.helpers.ClassFileInstaller sun.hotspot.WhiteBox
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:-CheckIntrinsics sun.hotspot.WhiteBox
 */

package sun.hotspot;

public class WhiteBox {
    @SuppressWarnings("serial")
    public static class WhiteBoxPermission extends java.security.BasicPermission {
        // ClassFileInstaller is hard-coded to copy WhiteBox$WhiteBoxPermission, so let's
        // make a fake one here as well.
        public WhiteBoxPermission(String s) {
            super(s);
        }
    }

    private static native void registerNatives();
    static { registerNatives(); }
    public native int notExistedMethod();
    public native int getHeapOopSize();
    public static void main(String[] args) {
        WhiteBox wb = new WhiteBox();
        if (wb.getHeapOopSize() < 0) {
            throw new Error("wb.getHeapOopSize() < 0");
        }
        boolean catched = false;
        try {
            wb.notExistedMethod();
        } catch (UnsatisfiedLinkError e) {
            catched = true;
        }
        if (!catched) {
            throw new Error("wb.notExistedMethod() was invoked");
        }
    }
}