test/hotspot/jtreg/runtime/jni/checked/libTestCheckedReleaseCriticalArray.c

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#include <jni.h>

JNIEXPORT jboolean JNICALL
Java_TestCheckedReleaseCriticalArray_modifyArray(JNIEnv *env,
                                                 jclass clazz,
                                                 jintArray iarr) {
  jboolean isCopy;
  jint* arr = (jint *)(*env)->GetPrimitiveArrayCritical(env, iarr, &isCopy);
  if (arr == NULL) {
    (*env)->FatalError(env, "Unexpected NULL return from GetPrimitiveArrayCritical");
  }
  if (isCopy == JNI_FALSE) {
    jint len = (*env)->GetArrayLength(env, iarr);
    // make arbitrary changes to the array
    int i;
    for (i = 0; i < len; i++) {
      arr[i] *= 2;
    }
    // write-back using JNI_COMMIT to test for memory leak
    (*env)->ReleasePrimitiveArrayCritical(env, iarr, arr, JNI_COMMIT);
  }
  // we skip the test if the VM makes a copy - as it will definitely leak
  return !isCopy;
}