/*

 * Copyright (c) 2018, Red Hat, Inc. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include <jni.h>

#include <stdio.h>

#include <stdlib.h>

JNIEnv* create_vm(JavaVM **jvm, char *extra_option)

{

    JNIEnv* env;

    JavaVMInitArgs args;

    JavaVMOption options[4];

    args.version = JNI_VERSION_1_8;

    args.nOptions = 3 + (extra_option != NULL);

    options[0].optionString = "-Xss2048k";

    char classpath[4096];

    snprintf(classpath, sizeof classpath,

             "-Djava.class.path=%s", getenv("CLASSPATH"));

    options[1].optionString = classpath;

    options[2].optionString = "-XX:+UnlockExperimentalVMOptions";

    if (extra_option) {

      options[3].optionString = extra_option;

    }

    args.options = &options[0];

    args.ignoreUnrecognized = 0;

    int rv;

    rv = JNI_CreateJavaVM(jvm, (void**)&env, &args);

    if (rv < 0) return NULL;

    return env;

}

void run(char *extra_arg) {

  JavaVM *jvm;

  jclass T_class;

  jmethodID test_method;

  JNIEnv *env = create_vm(&jvm, extra_arg);

  if (env == NULL)

    exit(1);

  T_class = (*env)->FindClass(env, "T");

  test_method = (*env)->GetStaticMethodID(env, T_class, "test", "(I)V");

  (*env)->CallStaticVoidMethod(env, T_class, test_method, 1000);

}

int main(int argc, char **argv)

{

  if (argc > 1) {

    run(argv[1]);

  } else {

    run(NULL);

  }

  return 0;

}