jdk-24/test/hotspot/jtreg/serviceability/jvmti/RedefineClasses/TestRedefineCondy.java

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/*
 * @test
 * @bug 8228596
 * @summary Test redefining a class with a condy in its constant pool
 * @requires vm.jvmti
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 * @modules java.compiler
 *          java.instrument
 *          jdk.jartool/sun.tools.jar
 * @compile RedefineCondy.jasm
 * @run main RedefineClassHelper
 * @run main/othervm -javaagent:redefineagent.jar TestRedefineCondy
 */

import jdk.test.lib.compiler.InMemoryJavaCompiler;

// Test redefining a class that has a constant dynamic in its constant pool
// to a class that does not have a constant dynamic in its constant pool.
public class TestRedefineCondy {

    static final String DEST = System.getProperty("test.classes");
    static String newClass = """
        public class RedefineCondy {
            public RedefineCondy(java.lang.invoke.MethodHandles.Lookup l, java.lang.String s, java.lang.Class c) {}
            public static void main(String argv[]) {}
        }
        """;

    public static void main(String[] args) throws Exception  {
        Class<?> classWithCondy = Class.forName("RedefineCondy");

        try {
            byte[] classBytes = InMemoryJavaCompiler.compile("RedefineCondy", newClass);
            RedefineClassHelper.redefineClass(classWithCondy, classBytes);
        } catch (Exception e) {
            throw new RuntimeException("Unexpected exception: " + e.getMessage());
        }
    }
}