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 CriticalNativeStress
28 * @key gc
29 * @bug 8199868
30 * @requires (os.arch =="x86_64" | os.arch == "amd64") & (vm.bits == "64") & vm.gc.Epsilon & !vm.graal.enabled
31 * @requires (os.arch =="x86_64" | os.arch == "amd64") & (vm.bits == "64") & vm.gc.Shenandoah & !vm.graal.enabled
32 * @summary test argument pinning by nmethod wrapper of critical native method
33 * @run main/othervm/native -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -Xcomp -Xmx1G -XX:+CriticalJNINatives CriticalNativeStress
34 *
35 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=passive -XX:+ShenandoahDegeneratedGC -Xcomp -Xmx512M -XX:+CriticalJNINatives CriticalNativeStress
36 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=passive -XX:-ShenandoahDegeneratedGC -Xcomp -Xmx512M -XX:+CriticalJNINatives CriticalNativeStress
37 *
38 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive -Xcomp -Xmx512M -XX:+CriticalJNINatives CriticalNativeStress
39 *
40 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xcomp -Xmx256M -XX:+CriticalJNINatives CriticalNativeStress
41 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=traversal -Xcomp -Xmx512M -XX:+CriticalJNINatives CriticalNativeStress
42 */
43 public class CriticalNativeStress {
44 private static Random rand = new Random();
45 static {
46 System.loadLibrary("CriticalNative");
47 }
48
49 // CYCLES and THREAD_PER_CASE are used to tune the tests for different GC settings,
50 // so that they can execrise enough GC cycles and not OOM
51 private static int CYCLES = Integer.getInteger("cycles", 3);
52 private static int THREAD_PER_CASE = Integer.getInteger("threadPerCase", 1);
53
54 static native long sum1(long[] a);
55
56 // More than 6 parameters
57 static native long sum2(long a1, int[] a2, int[] a3, long[] a4, int[] a5);
58
59 static long sum(long[] a) {
60 long sum = 0;
61 for (int index = 0; index < a.length; index ++) {
62 sum += a[index];
63 }
64 return sum;
65 }
66
67 static long sum(int[] a) {
68 long sum = 0;
69 for (int index = 0; index < a.length; index ++) {
70 sum += a[index];
71 }
72 return sum;
73 }
74
75 private static volatile String garbage_array[];
76
77 // GC potentially moves arrays passed to critical native methods
78 // if they are not pinned correctly.
79 // Create enough garbages to exercise GC cycles, verify
80 // the arrays are pinned correctly.
81 static void create_garbage(int len) {
82 len = Math.max(len, 1024);
83 String array[] = new String[len];
84 for (int index = 0; index < len; index ++) {
85 array[index] = "String " + index;
86 }
87 garbage_array = array;
88 }
89
90 // Two test cases with different method signatures:
91 // Tests generate arbitrary length of arrays with
92 // arbitrary values, then calcuate sum of the array
93 // elements with critical native JNI methods and java
94 // methods, and compare the results for correctness.
95 static void run_test_case1() {
96 // Create testing arary with arbitrary length and
97 // values
98 int length = rand.nextInt(50) + 1;
99 long[] arr = new long[length];
100 for (int index = 0; index < length; index ++) {
101 arr[index] = rand.nextLong() % 1002;
102 }
103
104 // Generate garbages to trigger GCs
105 for (int index = 0; index < length; index ++) {
106 create_garbage(index);
107 }
108
109 // Compare results for correctness.
110 long native_sum = sum1(arr);
111 long java_sum = sum(arr);
112 if (native_sum != java_sum) {
113 StringBuffer sb = new StringBuffer("Sums do not match: native = ")
114 .append(native_sum).append(" java = ").append(java_sum);
115
116 throw new RuntimeException(sb.toString());
117 }
118 }
119
120 static void run_test_case2() {
121 // Create testing arary with arbitrary length and
122 // values
123 int index;
124 long a1 = rand.nextLong() % 1025;
125
126 int a2_length = rand.nextInt(50) + 1;
127 int[] a2 = new int[a2_length];
128 for (index = 0; index < a2_length; index ++) {
129 a2[index] = rand.nextInt(106);
130 }
131
132 int a3_length = rand.nextInt(150) + 1;
133 int[] a3 = new int[a3_length];
134 for (index = 0; index < a3_length; index ++) {
135 a3[index] = rand.nextInt(3333);
136 }
137
138 int a4_length = rand.nextInt(200) + 1;
139 long[] a4 = new long[a4_length];
140 for (index = 0; index < a4_length; index ++) {
141 a4[index] = rand.nextLong() % 122;
142 }
143
144 int a5_length = rand.nextInt(350) + 1;
145 int[] a5 = new int[a5_length];
146 for (index = 0; index < a5_length; index ++) {
147 a5[index] = rand.nextInt(333);
148 }
149
150 // Generate garbages to trigger GCs
151 for (index = 0; index < a1; index ++) {
152 create_garbage(index);
153 }
154
155 // Compare results for correctness.
156 long native_sum = sum2(a1, a2, a3, a4, a5);
157 long java_sum = a1 + sum(a2) + sum(a3) + sum(a4) + sum(a5);
158 if (native_sum != java_sum) {
159 StringBuffer sb = new StringBuffer("Sums do not match: native = ")
160 .append(native_sum).append(" java = ").append(java_sum);
161
162 throw new RuntimeException(sb.toString());
163 }
164 }
165
166 static class Case1Runner extends Thread {
167 public Case1Runner() {
168 start();
169 }
170
171 public void run() {
172 for (int index = 0; index < CYCLES; index ++) {
173 run_test_case1();
174 }
175 }
176 }
177
178 static class Case2Runner extends Thread {
179 public Case2Runner() {
180 start();
181 }
182
183 public void run() {
184 for (int index = 0; index < CYCLES; index ++) {
185 run_test_case2();
186 }
187 }
188 }
189
190 public static void main(String[] args) {
191 Thread[] thrs = new Thread[THREAD_PER_CASE * 2];
192 for (int index = 0; index < thrs.length; index = index + 2) {
193 thrs[index] = new Case1Runner();
194 thrs[index + 1] = new Case2Runner();
195 }
196
197 for (int index = 0; index < thrs.length; index ++) {
198 try {
199 thrs[index].join();
200 } catch (Exception e) {
201 e.printStackTrace();
202 }
203 }
204 }
205 }