1 /*
   2  * Copyright (c) 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 <jni.h>
  25 
  26 JNIEXPORT void JNICALL
  27 Java_RefOOME_testWeak(JNIEnv *env, jclass clazz, jobject obj) {
  28   for (int i = 0; i < 100; i++) {
  29     jweak w = (*env)->NewWeakGlobalRef(env, obj);
  30     if ((*env)->ExceptionCheck(env)) {
  31       return;
  32     }
  33     if (w == NULL) {
  34       (*env)->FatalError(env, "OOME expected if NULL returned");
  35       return;
  36     }
  37     (*env)->DeleteWeakGlobalRef(env, w);
  38   }
  39 }
  40 
  41 JNIEXPORT void JNICALL
  42 Java_RefOOME_testGlobal(JNIEnv *env, jclass clazz, jobject obj) {
  43   for (int i = 0; i < 100; i++) {
  44     jobject w = (*env)->NewGlobalRef(env, obj);
  45     if (w == NULL) {
  46       jclass oome = (*env)->FindClass(env, "java/lang/OutOfMemoryError");
  47       if ((*env)->ExceptionCheck(env)) {
  48         return;
  49       }
  50       (*env)->ThrowNew(env, oome,  "NewGlobalRef returned NULL");
  51       return;
  52     }
  53     (*env)->DeleteGlobalRef(env, w);
  54   }
  55 }
  56 
  57 JNIEXPORT void JNICALL
  58 Java_RefOOME_testLocal(JNIEnv *env, jclass clazz, jobject obj) {
  59   for (int i = 0; i < 100; i++) {
  60     jobject w = (*env)->NewLocalRef(env, obj);
  61     if (w == NULL) {
  62       jclass oome = (*env)->FindClass(env, "java/lang/OutOfMemoryError");
  63       if ((*env)->ExceptionCheck(env)) {
  64         return;
  65       }
  66       (*env)->ThrowNew(env, oome,  "NewLocalRef returned NULL");
  67       return;
  68     }
  69     (*env)->DeleteLocalRef(env,w);
  70   }
  71 }