hotspot/test/runtime/Unsafe/RangeCheck.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test
 * @bug 8001071
 * @summary Add simple range check into VM implemenation of Unsafe access methods
 * @library /testlibrary
 * @modules java.base/jdk.internal.misc
 *          java.management
 */

import jdk.test.lib.*;
import jdk.internal.misc.Unsafe;

public class RangeCheck {

    public static void main(String args[]) throws Exception {
        if (!Platform.isDebugBuild()) {
            System.out.println("Testing assert which requires a debug build. Passing silently.");
            return;
        }

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
                true,
                "-Xmx32m",
                "--add-exports=java.base/jdk.internal.misc=ALL-UNNAMED",
                "-XX:-TransmitErrorReport",
                "-XX:-CreateCoredumpOnCrash",
                "-XX:-InlineUnsafeOps", // The compiler intrinsics doesn't have the assert
                DummyClassWithMainRangeCheck.class.getName());

        OutputAnalyzer output = new OutputAnalyzer(pb.start());
        output.shouldMatch("assert\\(byte_offset < p_size\\) failed: Unsafe access: offset \\d+ > object's size \\d+");
    }

    public static class DummyClassWithMainRangeCheck {
        public static void main(String args[]) throws Exception {
            Unsafe unsafe = Utils.getUnsafe();
            unsafe.getObject(new DummyClassWithMainRangeCheck(), Short.MAX_VALUE);
        }
    }
}