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/*
 * @test
 * @summary Test that parsing a hidden class with max constant pool entries
 *          doesn't crash the VM when adding an entry for the hidden class name.
 *          Instead throws ClassFormatError.
 * @bug 8364360
 * @modules java.base/jdk.internal.access
 *          java.base/jdk.internal.reflect
 * @library /testlibrary/asm
 * @run main HiddenClassesTest
 */

import java.lang.invoke.MethodHandles;

import org.objectweb.asm.ClassWriter;
import static org.objectweb.asm.Opcodes.ACC_PUBLIC;
import static org.objectweb.asm.Opcodes.V17;

public class HiddenClassesTest {

    public static void main(String[] args) throws Exception {
        var cw = new ClassWriter(0);
        cw.visit(V17, ACC_PUBLIC, "Hidden", null, "java/lang/Object", null);
        // This magic number causes a constant pool index overflow with this asm generated class.
        int i = 0;
        while (i < 65535-1) {
            i = cw.newUTF8(Integer.toString(i));
        }
        try {
            MethodHandles.lookup().defineHiddenClass(cw.toByteArray(), false);
            throw new RuntimeException("Test Failed: ClassFormatError expected.");
        } catch (ClassFormatError cfe) {
            String message = cfe.getMessage();
            if (message == null || !message.contains("Overflow in constant pool size for hidden class")) {
                throw new RuntimeException("Test Failed: wrong ClassFormatError " + message);
            }
            System.out.println("ClassFormatError thrown as expected. Message: " + cfe.getMessage());
        }
    }
}