1 /*

     2  * Copyright (c) 2015, 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 #include <string.h>

    27 #include <unistd.h>

    28 #include <jni.h>

    29 

    30 #ifdef __cplusplus

    31 extern "C" {

    32 #endif

    33 

    34 JNIEXPORT jstring JNICALL Java_SEGVOverflow_nativesegv(JNIEnv *env, jobject obj) {

    35   char *buffer1;

    36   char *buffer2;

    37   char *buffer3;

    38   char ch;

    39 

    40   jstring ret = NULL;

    41 

    42   // sleep for a bit to let the libadimalloc library initialize

    43   sleep(5);

    44 

    45   // allocate three buffers

    46   buffer1 = (char *)malloc(64);

    47   buffer2 = (char *)malloc(64);

    48   buffer3 = (char *)malloc(64);

    49   if ((buffer1 == NULL) || (buffer2 == NULL) || (buffer3 == NULL)) {

    50     // this return will result in a test failure

    51     return ret;

    52   }

    53 

    54   // Read past the end of each buffer multiple times to increase the probability

    55   // that an ADI version mismatch occurs so an ADI fault is triggered.

    56   ch = buffer1[70];

    57   ch = buffer2[70];

    58   ch = buffer3[70];

    59   ch = buffer1[140];

    60   ch = buffer2[140];

    61   ch = buffer3[140];

    62 

    63   // create a failed test return value because this test should have cored

    64   buffer1 = "TEST FAILED, a read past the end of a buffer succeeded.";

    65   ret = (*env)->NewStringUTF(env, buffer1);

    66 

    67   return ret;

    68 }

    69 

    70 #ifdef __cplusplus

    71 }

    72 #endif