1 /*
2 * Copyright (c) 2018, 2019, 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 package gc.stress;
24
25 import java.util.Random;
26
27 import gc.CriticalNative;
28
29 /*
30 * @test CriticalNativeStressEpsilon
31 * @key gc
32 * @bug 8199868
33 * @library /
34 * @requires vm.bits == "64" & (os.arch =="x86_64" | os.arch == "amd64") & vm.gc.Epsilon & !vm.graal.enabled
35 * @summary test argument pinning by nmethod wrapper of critical native method
36 * @run main/othervm/native -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -Xcomp -Xmx1G -XX:+CriticalJNINatives gc.stress.CriticalNativeStress
37 */
38
39 /*
40 * @test CriticalNativeStressShenandoah
41 * @key gc
42 * @bug 8199868
43 * @library /
44 * @requires vm.bits == "64" & (os.arch =="x86_64" | os.arch == "amd64") & vm.gc.Shenandoah & !vm.graal.enabled
45 * @summary test argument pinning by nmethod wrapper of critical native method
46 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive -XX:-ShenandoahDegeneratedGC -Xcomp -Xmx512M -XX:+CriticalJNINatives gc.stress.CriticalNativeStress
47 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive -XX:+ShenandoahDegeneratedGC -Xcomp -Xmx512M -XX:+CriticalJNINatives gc.stress.CriticalNativeStress
48 *
49 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive -Xcomp -Xmx512M -XX:+CriticalJNINatives gc.stress.CriticalNativeStress
50 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xcomp -Xmx256M -XX:+CriticalJNINatives gc.stress.CriticalNativeStress
51 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=traversal -Xcomp -Xmx512M -XX:+CriticalJNINatives gc.stress.CriticalNativeStress
52 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=traversal -XX:ShenandoahGCHeuristics=aggressive -Xcomp -Xmx512M -XX:+CriticalJNINatives gc.stress.CriticalNativeStress
53 */
54 public class CriticalNativeStress {
55 private static Random rand = new Random();
56
57 // CYCLES and THREAD_PER_CASE are used to tune the tests for different GC settings,
58 // so that they can execrise enough GC cycles and not OOM
59 private static int CYCLES = Integer.getInteger("cycles", 3);
60 private static int THREAD_PER_CASE = Integer.getInteger("threadPerCase", 1);
61
62 static long sum(long[] a) {
63 long sum = 0;
64 for (int index = 0; index < a.length; index ++) {
65 sum += a[index];
66 }
67 return sum;
68 }
69
70 static long sum(int[] a) {
71 long sum = 0;
72 for (int index = 0; index < a.length; index ++) {
73 sum += a[index];
74 }
75 return sum;
76 }
77
78 private static volatile String garbage_array[];
79
80 // GC potentially moves arrays passed to critical native methods
81 // if they are not pinned correctly.
82 // Create enough garbages to exercise GC cycles, verify
83 // the arrays are pinned correctly.
84 static void create_garbage(int len) {
85 len = Math.max(len, 1024);
86 String array[] = new String[len];
87 for (int index = 0; index < len; index ++) {
88 array[index] = "String " + index;
89 }
90 garbage_array = array;
91 }
92
93 // Two test cases with different method signatures:
94 // Tests generate arbitrary length of arrays with
95 // arbitrary values, then calcuate sum of the array
96 // elements with critical native JNI methods and java
97 // methods, and compare the results for correctness.
98 static void run_test_case1() {
99 // Create testing arary with arbitrary length and
100 // values
101 int length = rand.nextInt(50) + 1;
102 long[] arr = new long[length];
103 for (int index = 0; index < length; index ++) {
104 arr[index] = rand.nextLong() % 1002;
105 }
106
107 // Generate garbages to trigger GCs
108 for (int index = 0; index < length; index ++) {
109 create_garbage(index);
110 }
111
112 // Compare results for correctness.
113 long native_sum = CriticalNative.sum1(arr);
114 long java_sum = sum(arr);
115 if (native_sum != java_sum) {
116 StringBuffer sb = new StringBuffer("Sums do not match: native = ")
117 .append(native_sum).append(" java = ").append(java_sum);
118
119 throw new RuntimeException(sb.toString());
120 }
121 }
122
123 static void run_test_case2() {
124 // Create testing arary with arbitrary length and
125 // values
126 int index;
127 long a1 = rand.nextLong() % 1025;
128
129 int a2_length = rand.nextInt(50) + 1;
130 int[] a2 = new int[a2_length];
131 for (index = 0; index < a2_length; index ++) {
132 a2[index] = rand.nextInt(106);
133 }
134
135 int a3_length = rand.nextInt(150) + 1;
136 int[] a3 = new int[a3_length];
137 for (index = 0; index < a3_length; index ++) {
138 a3[index] = rand.nextInt(3333);
139 }
140
141 int a4_length = rand.nextInt(200) + 1;
142 long[] a4 = new long[a4_length];
143 for (index = 0; index < a4_length; index ++) {
144 a4[index] = rand.nextLong() % 122;
145 }
146
147 int a5_length = rand.nextInt(350) + 1;
148 int[] a5 = new int[a5_length];
149 for (index = 0; index < a5_length; index ++) {
150 a5[index] = rand.nextInt(333);
151 }
152
153 // Generate garbages to trigger GCs
154 for (index = 0; index < a1; index ++) {
155 create_garbage(index);
156 }
157
158 // Compare results for correctness.
159 long native_sum = CriticalNative.sum2(a1, a2, a3, a4, a5);
160 long java_sum = a1 + sum(a2) + sum(a3) + sum(a4) + sum(a5);
161 if (native_sum != java_sum) {
162 StringBuffer sb = new StringBuffer("Sums do not match: native = ")
163 .append(native_sum).append(" java = ").append(java_sum);
164
165 throw new RuntimeException(sb.toString());
166 }
167 }
168
169 static class Case1Runner extends Thread {
170 public Case1Runner() {
171 start();
172 }
173
174 public void run() {
175 for (int index = 0; index < CYCLES; index ++) {
176 run_test_case1();
177 }
178 }
179 }
180
181 static class Case2Runner extends Thread {
182 public Case2Runner() {
183 start();
184 }
185
186 public void run() {
187 for (int index = 0; index < CYCLES; index ++) {
188 run_test_case2();
189 }
190 }
191 }
192
193 public static void main(String[] args) {
194 Thread[] thrs = new Thread[THREAD_PER_CASE * 2];
195 for (int index = 0; index < thrs.length; index = index + 2) {
196 thrs[index] = new Case1Runner();
197 thrs[index + 1] = new Case2Runner();
198 }
199
200 for (int index = 0; index < thrs.length; index ++) {
201 try {
202 thrs[index].join();
203 } catch (Exception e) {
204 e.printStackTrace();
205 }
206 }
207 }
208 }