Subj : Rhino and JNI
To   : netscape.public.mozilla.jseng
From : Paulo R. Panhoto
Date : Thu Jul 08 2004 03:35 pm

	Hello everyone,

	I would like to know if anyone has experienced problems with rhino and 
JNI. I have a Java class that wraps rhino and I would like to use it in 
both a Java application and a DLL. When I invoke a JVM from my DLL (yet 
a native executable program, it will be the DLL when stable) I get an 
access violation when the GC runs.

	Can I get some help? I  am using Visual C++ 6 and j2sdk1.4.2_05

	Thanks in advance.

	Here is the relevant code:

Wrapper.cpp -----------------------------------------------------

BOOL WINAPI DllMain(HINSTANCE, DWORD dwReason, LPVOID)
{
   switch(dwReason)
   {
   case DLL_PROCESS_ATTACH:
     {
       JavaVMInitArgs args = {0};

       args.version = JNI_VERSION_1_4;
       args.nOptions = 3;
       JavaVMOption options[] =
       {{"-Djava.class.path=.;c:\\lib\\java\\rhino1_5R5\\js.jar;"},
        {"-verbose:gc"}, {"-Xnoclassgc"}};
       args.options = options;

       if(JNI_CreateJavaVM(&jvm, (void **) &env, &args) < 0)
         return FALSE;
     }
     break;
   case DLL_PROCESS_DETACH:
     jvm->DestroyJavaVM();
     break;
   }

   return TRUE;
}

void WINAPI Init()
{
   jclass obj_class = env->FindClass("Invoker");
   jmethodID id = env->GetStaticMethodID(obj_class, "main", 
"([Ljava/lang/String;)V");
   env->CallStaticVoidMethod(obj_class, id);
}

Invoker.java --------------------------------------------------------

import org.mozilla.javascript.*;
class Invoker
{
   public static void main(String[] args)
   {
     System.out.println("enter");
     Context c = Context.enter();

     System.out.println("init");
     Scriptable s = c.initStandardObjects();

     try
     {
       System.out.println("eval");
       System.out.println(c.evaluateString(s, "1;", "teste", 0, null));
     }
     catch(Exception e)
     {
       e.printStackTrace();
     }

     System.out.println("exit");
     Context.exit();
   }

}

.