149    two main classes. This is the class we will run under the debugger.

   149    two main classes. This is the class we will run under the debugger.

   150    Package access so we can define in the same source file for ease of

   150    Package access so we can define in the same source file for ease of

   151    reference.

   151    reference.

   152 */

   152 */

   153 class Target {

   153 class Target {

   154     // We have to load all of the variants of the classes that we will

   157     // We have to load all of the variants of the classes that we will

   155     // attempt to redefine. This requires some in-memory compilation

   158     // attempt to redefine. This requires some in-memory compilation

   156     // and use of additional classloaders.

   159     // and use of additional classloaders.

   157     public static void main(String[] args) throws Throwable {

   161     public static void main(String[] args) throws Throwable {

   158         String origin = args[0];

   162         String origin = args[0];

   159         System.out.println("Target: Testing original Host class from " + origin);

   163         System.out.println("Target: Testing original Host class from " + origin);

   160 

   164 

   161         // Make sure the Host class loaded directly is an original version

   165         // Make sure the Host class loaded directly is an original version

   176             // This is compiled as a top-level class: the $ in the name is not

   180             // This is compiled as a top-level class: the $ in the name is not

   177             // significant to the compiler.

   181             // significant to the compiler.

   178             String hostA = "public class " + name + " {}";

   182             String hostA = "public class " + name + " {}";

   179             byte[] bytes = InMemoryJavaCompiler.compile(name, hostA);

   183             byte[] bytes = InMemoryJavaCompiler.compile(name, hostA);

   180             // And we have to load this into a new classloader

   184             // And we have to load this into a new classloader

   182             // The loaded class has not been linked (as per ClassLoader.resolveClass)

   186             // The loaded class has not been linked (as per ClassLoader.resolveClass)

   183             // and so will be filtered out by VirtualMachine.allClasses(). There are

   187             // and so will be filtered out by VirtualMachine.allClasses(). There are

   184             // a number of ways to force linking - this is the simplest.

   188             // a number of ways to force linking - this is the simplest.

   185             Object o = topLevelHostA.newInstance();

   189             Object o = topLevelHostA.newInstance();

   186 

   190