test/hotspot/jtreg/compiler/intrinsics/mathexact/LongMulOverflowTest.java

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/*
 * @test
 * @bug 8191915
 * @summary Regression test for multiplyExact intrinsic
 * @library /test/lib /
 * @modules java.base/jdk.internal.misc
 *          java.management
 *
 * @run main/othervm -Xcomp -XX:-TieredCompilation compiler.intrinsics.mathexact.LongMulOverflowTest
 */

package compiler.intrinsics.mathexact;

public class LongMulOverflowTest {
    public static void main(String[] args) {
        LongMulOverflowTest test = new LongMulOverflowTest();
        for (int i = 0; i < 10; ++i) {
            try {
                test.runTest();
                throw new RuntimeException("Error, runTest() did not overflow!");
            } catch (ArithmeticException e) {
                // success
            }

            try {
                test.runTestOverflow();
                throw new RuntimeException("Error, runTestOverflow() did not overflow!");
            } catch (ArithmeticException e) {
                // success
            }
        }
    }

    public void runTest() {
        java.lang.Math.multiplyExact(Long.MIN_VALUE, 7);
    }

    public void runTestOverflow() {
      java.lang.Math.multiplyExact((Long.MAX_VALUE / 2) + 1, 2);
    }
}