Re: SableVM on ARM Zaurus

> Where did you get this message from?  Would you suggest a patch
> to sablevm that would print it out in case of such a problem?
> 

See for yourself. I changed the Java_java_lang_VMRuntime_nativeLoad
routine as follows:

Java_java_lang_VMRuntime_nativeLoad (JNIEnv *_env, jclass class SVM_UNUSED,
				     jstring _filename)
{
  _svmt_JNIEnv *env = _svmf_cast_svmt_JNIEnv (_env);
  _svmt_JavaVM *vm = env->vm;
  const char *errmsg = "unknown error";

  _svmf_resuming_java (env);

  {
    char *filename;
    _svmt_class_loader_info *class_loader_info =
      _svmf_get_current_class_loader (env);
    _svmt_native_library *native_library =
      class_loader_info->native_library_list;
    lt_dlhandle handle;
    jboolean monitor_acquired = JNI_FALSE;

printf("GrepLine1: Java_java_lang_VMRuntime_nativeLoad entered\n");
fflush(NULL);

    if (_svmf_enter_class_loader_monitor (env, class_loader_info) != JNI_OK)
      {
	goto end;
      }

    monitor_acquired = JNI_TRUE;

printf("GrepLine2: if (_svmm_galloc_utf_chars (env, _filename,
filename) != JNI_OK)\n"); fflush(NULL);

    if (_svmm_galloc_utf_chars (env, _filename, filename) != JNI_OK)
      {
	goto end;
      }

    handle = lt_dlopenext (filename);

printf("GrepLine3: handle = lt_dlopenext (%s);\n", filename); fflush(NULL);

    if (handle == NULL)
      {
	errmsg = lt_dlerror ();
	_svmm_gfree_utf_chars (filename);
	goto end;
      }

    while (native_library != NULL)
      {
	if (native_library->handle == handle)
	  {
printf("GrepLine4: _svmm_gfree_utf_chars (%s)\n", filename); fflush(NULL);
	    errmsg = NULL;
	    _svmm_gfree_utf_chars (filename);
	    goto end;
	  }

	native_library = native_library->next;
      }

    /* Call JNI_OnLoad */
    {
      JNIEXPORT jint (JNICALL *JNI_OnLoad) (JavaVM *, void *);

      JNI_OnLoad = SVM_CAST_EXTENSION
	(JNIEXPORT jint (JNICALL *)(JavaVM *, void *)) lt_dlsym (handle,
								 "JNI_OnLoad");

      if (JNI_OnLoad != NULL)
	{
	  jint version = JNI_OnLoad (_svmf_cast_JavaVM (vm), NULL);

printf("GrepLine5: JNI_OnLoad (_svmf_cast_JavaVM (vm), NULL) == %d\n",
version); fflush(NULL);
	  if (version != JNI_VERSION_1_2)
	    {
	      lt_dlclose (handle);
	      goto end;
	    }
	}
    }

printf("GrepLine6: before Check JNI_OK\n"); fflush(NULL);

    if (_svmm_cl_zalloc_native_library
	(env, class_loader_info,
	 *(class_loader_info->native_library_list_tail)) != JNI_OK)
      {
	_svmm_gfree_utf_chars (filename);
	goto end;
      }

    (*(class_loader_info->native_library_list_tail))->name = filename;
    (*(class_loader_info->native_library_list_tail))->handle = handle;

    class_loader_info->native_library_list_tail =
      &(*(class_loader_info->native_library_list_tail))->next;

    errmsg = NULL;

  end:

printf("GrepLine7: Just after end:\n"); fflush(NULL);

    if (monitor_acquired)
      {
	monitor_acquired = JNI_FALSE;

	if (_svmf_exit_class_loader_monitor (env, class_loader_info) !=
	    JNI_OK)
	  {
	    goto end;
	  }
      }

  }

printf("GrepLine8: _svmf_stopping_java (env)\n"); fflush(NULL);

  _svmf_stopping_java (env);

printf("GrepLine9: Java_java_lang_VMRuntime_nativeLoad exit, errmsg
is: %s\n", errmsg); fflush(NULL);

  return errmsg == NULL ? 1 : 0;
}

> Great!  This also means we really need to provide information about
> what the real problem was, so that the next person didn't need to
> repeat the whole cycle :-/

What do you suggest, should I make a step-by-step how-to?
 
> Congratulations on the persistence :-)

Thanks, I wouldn't have made it without your help though, or at least
it had taken me much more time!