test/hotspot/jtreg/compiler/ciReplay/TestLambdas.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 8275670
 * @library / /test/lib
 * @summary testing of ciReplay with nested BoundMethodHandles
 * @requires vm.flightRecorder != true & vm.compMode != "Xint" & vm.debug == true & vm.compiler2.enabled
 * @modules java.base/jdk.internal.misc
 * @build jdk.test.whitebox.WhiteBox
 * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
 *      compiler.ciReplay.TestLambdas
 */

package compiler.ciReplay;

public class TestLambdas extends CiReplayBase {
    public static void main(String args[]) {
        new TestLambdas().runTest(false, TIERED_DISABLED_VM_OPTION);
    }

    @Override
    public void testAction() {
        positiveTest(TIERED_DISABLED_VM_OPTION);
    }

    @Override
    public String getTestClass() {
        return Test.class.getName();
    }
}

class Test {
    public static void main(String[] args) {
        for (int i = 0; i < 20_000; i++) {
            test(i);
        }
    }

    static void test(int i) {
        concat_lambdas();
    }


    // Create nested BoundMethodHandle using StringConcatHelper
    static boolean concat_lambdas() {
        String source = "0123456789abcdefgABCDEFG";
        String result = "";

        int max = 10;
        for (int cp = 0; cp < max; ++cp) {
            String regex = new String(Character.toChars(cp));
            result =  source.substring(0, 3) + regex
                 + source.substring(3, 9) + regex
                 + source.substring(9, 15) + regex
                 + source.substring(15);
        }
        return result.equals("xyzzy");
    }
}