1 /*
   2  * Copyright (c) 2017, 2020, 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 #include <stdio.h>
  25 #include <stdlib.h>
  26 
  27 #include "jni.h"
  28 
  29 static jint count = 0;
  30 static jclass test_class;
  31 static jint current_jni_version = JNI_VERSION_10;
  32 
  33 JNIEXPORT jint JNICALL
  34 JNI_OnLoad(JavaVM *vm, void *reserved) {
  35     JNIEnv *env;
  36     jclass cl;
  37 
  38     (*vm)->GetEnv(vm, (void **) &env, current_jni_version);
  39 
  40     cl = (*env)->FindClass(env, "NativeLibraryTest");
  41     test_class = (*env)->NewGlobalRef(env, cl);
  42 
  43     // increment the count when JNI_OnLoad is called
  44     count++;
  45 
  46     return current_jni_version;
  47 }
  48 
  49 JNIEXPORT void JNICALL
  50 JNI_OnUnload(JavaVM *vm, void *reserved) {
  51     JNIEnv *env;
  52     jmethodID mid;
  53     jclass cl;
  54 
  55     (*vm)->GetEnv(vm, (void **) &env, current_jni_version);
  56     mid = (*env)->GetStaticMethodID(env, test_class, "nativeLibraryUnloaded", "()V");
  57     (*env)->CallStaticVoidMethod(env, test_class, mid);
  58     if ((*env)->ExceptionCheck(env)) {
  59         (*env)->ExceptionDescribe(env);
  60         (*env)->FatalError(env, "Exception thrown");
  61     }
  62 
  63     cl = (*env)->FindClass(env, "p/Test");
  64     if (cl != NULL) {
  65         (*env)->FatalError(env, "p/Test class should not be found");
  66     }
  67 }
  68 
  69 JNIEXPORT jint JNICALL
  70 Java_p_Test_count
  71 (JNIEnv *env, jclass cls) {
  72     return count;
  73 }