1 /*

     2  * Copyright (c) 2018, Red Hat, Inc. and/or its affiliates.

     3  *

     4  * This code is free software; you can redistribute it and/or modify it

     5  * under the terms of the GNU General Public License version 2 only, as

     6  * published by the Free Software Foundation.

     7  *

     8  * This code is distributed in the hope that it will be useful, but WITHOUT

     9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    11  * version 2 for more details (a copy is included in the LICENSE file that

    12  * accompanied this code).

    13  *

    14  * You should have received a copy of the GNU General Public License version

    15  * 2 along with this work; if not, write to the Free Software Foundation,

    16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    17  *

    18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    19  * or visit www.oracle.com if you need additional information or have any

    20  * questions.

    21  *

    22  */

    23 

    24 import java.util.Random;

    25 

    26 /*

    27  * @test CriticalNativeStressEpsilon

    28  * @key gc

    29  * @bug 8199868

    30  * @requires (os.arch =="x86_64" | os.arch == "amd64") & vm.gc.Epsilon & !vm.graal.enabled

    31  * @summary test argument pinning by nmethod wrapper of critical native method

    32  * @run main/othervm/native -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -Xcomp -Xmx1G -XX:+CriticalJNINatives CriticalNativeStress

    33  */

    34 

    35 /*

    36  * @test CriticalNativeStressShenandoah

    37  * @key gc

    38  * @bug 8199868

    39  * @requires (os.arch =="x86_64" | os.arch == "amd64") & vm.gc.Shenandoah & !vm.graal.enabled

    40  * @summary test argument pinning by nmethod wrapper of critical native method

    41  * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=passive    -XX:-ShenandoahDegeneratedGC -Xcomp -Xmx512M -XX:+CriticalJNINatives CriticalNativeStress

    42  * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=passive    -XX:+ShenandoahDegeneratedGC -Xcomp -Xmx512M -XX:+CriticalJNINatives CriticalNativeStress

    43  *

    44  * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive -Xcomp -Xmx512M -XX:+CriticalJNINatives CriticalNativeStress

    45  * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC                                       -Xcomp -Xmx256M -XX:+CriticalJNINatives CriticalNativeStress

    46  * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=traversal  -Xcomp -Xmx512M -XX:+CriticalJNINatives CriticalNativeStress

    47  */

    48 public class CriticalNativeStress {

    49     private static Random rand = new Random();

    50     static {

    51         System.loadLibrary("CriticalNative");

    52     }

    53 

    54     // CYCLES and THREAD_PER_CASE are used to tune the tests for different GC settings,

    55     // so that they can execrise enough GC cycles and not OOM

    56     private static int CYCLES = Integer.getInteger("cycles", 3);

    57     private static int THREAD_PER_CASE = Integer.getInteger("threadPerCase", 1);

    58 

    59     static native long sum1(long[] a);

    60 

    61     // More than 6 parameters

    62     static native long sum2(long a1, int[] a2, int[] a3, long[] a4, int[] a5);

    63 

    64     static long sum(long[] a) {

    65         long sum = 0;

    66         for (int index = 0; index < a.length; index ++) {

    67             sum += a[index];

    68         }

    69         return sum;

    70     }

    71 

    72     static long sum(int[] a) {

    73         long sum = 0;

    74         for (int index = 0; index < a.length; index ++) {

    75             sum += a[index];

    76         }

    77         return sum;

    78     }

    79 

    80     private static volatile String garbage_array[];

    81 

    82     // GC potentially moves arrays passed to critical native methods

    83     // if they are not pinned correctly.

    84     // Create enough garbages to exercise GC cycles, verify

    85     // the arrays are pinned correctly.

    86     static void create_garbage(int len) {

    87         len = Math.max(len, 1024);

    88         String array[] = new String[len];

    89         for (int index = 0; index < len; index ++) {

    90             array[index] = "String " + index;

    91         }

    92         garbage_array = array;

    93     }

    94 

    95     // Two test cases with different method signatures:

    96     // Tests generate arbitrary length of arrays with

    97     // arbitrary values, then calcuate sum of the array

    98     // elements with critical native JNI methods and java

    99     // methods, and compare the results for correctness.

   100     static void run_test_case1() {

   101         // Create testing arary with arbitrary length and

   102         // values

   103         int length = rand.nextInt(50) + 1;

   104         long[] arr = new long[length];

   105         for (int index = 0; index < length; index ++) {

   106             arr[index] = rand.nextLong() % 1002;

   107         }

   108 

   109         // Generate garbages to trigger GCs

   110         for (int index = 0; index < length; index ++) {

   111             create_garbage(index);

   112         }

   113 

   114         // Compare results for correctness.

   115         long native_sum = sum1(arr);

   116         long java_sum = sum(arr);

   117         if (native_sum != java_sum) {

   118             StringBuffer sb = new StringBuffer("Sums do not match: native = ")

   119                 .append(native_sum).append(" java = ").append(java_sum);

   120 

   121             throw new RuntimeException(sb.toString());

   122         }

   123     }

   124 

   125     static void run_test_case2() {

   126         // Create testing arary with arbitrary length and

   127         // values

   128         int index;

   129         long a1 = rand.nextLong() % 1025;

   130 

   131         int a2_length = rand.nextInt(50) + 1;

   132         int[] a2 = new int[a2_length];

   133         for (index = 0; index < a2_length; index ++) {

   134             a2[index] = rand.nextInt(106);

   135         }

   136 

   137         int a3_length = rand.nextInt(150) + 1;

   138         int[] a3 = new int[a3_length];

   139         for (index = 0; index < a3_length; index ++) {

   140             a3[index] = rand.nextInt(3333);

   141         }

   142 

   143         int a4_length = rand.nextInt(200) + 1;

   144         long[] a4 = new long[a4_length];

   145         for (index = 0; index < a4_length; index ++) {

   146             a4[index] = rand.nextLong() % 122;

   147         }

   148 

   149         int a5_length = rand.nextInt(350) + 1;

   150         int[] a5 = new int[a5_length];

   151         for (index = 0; index < a5_length; index ++) {

   152             a5[index] = rand.nextInt(333);

   153         }

   154 

   155         // Generate garbages to trigger GCs

   156         for (index = 0; index < a1; index ++) {

   157             create_garbage(index);

   158         }

   159 

   160         // Compare results for correctness.

   161         long native_sum = sum2(a1, a2, a3, a4, a5);

   162         long java_sum = a1 + sum(a2) + sum(a3) + sum(a4) + sum(a5);

   163         if (native_sum != java_sum) {

   164             StringBuffer sb = new StringBuffer("Sums do not match: native = ")

   165                 .append(native_sum).append(" java = ").append(java_sum);

   166 

   167             throw new RuntimeException(sb.toString());

   168         }

   169     }

   170 

   171     static class Case1Runner extends Thread {

   172         public Case1Runner() {

   173             start();

   174         }

   175 

   176         public void run() {

   177             for (int index = 0; index < CYCLES; index ++) {

   178                 run_test_case1();

   179             }

   180         }

   181     }

   182 

   183     static class Case2Runner extends Thread {

   184         public Case2Runner() {

   185             start();

   186         }

   187 

   188         public void run() {

   189             for (int index = 0; index < CYCLES; index ++) {

   190                 run_test_case2();

   191             }

   192         }

   193     }

   194 

   195     public static void main(String[] args) {

   196         Thread[] thrs = new Thread[THREAD_PER_CASE * 2];

   197         for (int index = 0; index < thrs.length; index = index + 2) {

   198             thrs[index] = new Case1Runner();

   199             thrs[index + 1] = new Case2Runner();

   200         }

   201 

   202         for (int index = 0; index < thrs.length; index ++) {

   203             try {

   204                 thrs[index].join();

   205             } catch (Exception e) {

   206                 e.printStackTrace();

   207             }

   208         }

   209     }

   210 }