1 /*
   2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "jni.h"
  26 #include "stdio.h"
  27 #include "stdlib.h"
  28 
  29 int main(int argc, char** args) {
  30     JavaVMInitArgs vm_args;
  31     JNIEnv *env;
  32     JavaVM *vm;
  33     int i =0;
  34     jint result;
  35 
  36     vm_args.version = JNI_VERSION_1_2;
  37     vm_args.ignoreUnrecognized = JNI_FALSE;
  38 
  39     JavaVMOption option1[2];
  40     option1[0].optionString="-XX:+PrintCommandLineFlags";
  41     option1[1].optionString="-Xrs";
  42 
  43     vm_args.options=option1;
  44     vm_args.nOptions=2;
  45 
  46     // Print the VM options in use
  47     printf("initVM: numOptions = %d\n", vm_args.nOptions);
  48     for (i = 0; i < vm_args.nOptions; i++)
  49     {
  50         printf("\tvm_args.options[%d].optionString = %s\n", i, vm_args.options[i].optionString);
  51     }
  52 
  53     // Initialize VM with given options
  54     result = JNI_CreateJavaVM( &vm, (void **) &env, &vm_args );
  55     if (result != 0) {
  56         printf("ERROR: cannot create JAVA VM.\n");
  57         exit(-1);
  58     }
  59 
  60     (*vm)->DestroyJavaVM(vm);
  61 }
  62