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 /*
25 * @test
26 * @bug 8072016
27 * @summary Infinite deoptimization/recompilation cycles in case of arraycopy with tightly coupled allocation
28 * @library /testlibrary /../../test/lib /compiler/whitebox
29 * @modules java.base/sun.misc
30 * java.management
31 * @build TestArrayCopyNoInitDeopt
32 * @run main ClassFileInstaller sun.hotspot.WhiteBox
33 * @run main ClassFileInstaller jdk.test.lib.Platform
34 * @run main/othervm -Xmixed -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
35 * -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:TypeProfileLevel=020
36 * TestArrayCopyNoInitDeopt
37 *
38 */
39
40
41 import sun.hotspot.WhiteBox;
42 import sun.hotspot.code.NMethod;
43 import jdk.test.lib.Platform;
44 import java.lang.reflect.*;
45
46 public class TestArrayCopyNoInitDeopt {
47
48 public static int[] m1(Object src) {
49 if (src == null) return null;
50 int[] dest = new int[10];
51 try {
52 System.arraycopy(src, 0, dest, 0, 10);
53 } catch (ArrayStoreException npe) {
54 }
55 return dest;
56 }
57
58 static Object m2_src(Object src) {
59 return src;
60 }
61
62 public static int[] m2(Object src) {
63 if (src == null) return null;
64 src = m2_src(src);
65 int[] dest = new int[10];
66 try {
67 System.arraycopy(src, 0, dest, 0, 10);
68 } catch (ArrayStoreException npe) {
69 }
70 return dest;
71 }
72
73 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
74
75 static boolean deoptimize(Method method, Object src_obj) throws Exception {
76 for (int i = 0; i < 10; i++) {
77 method.invoke(null, src_obj);
78 if (!WHITE_BOX.isMethodCompiled(method)) {
79 return true;
80 }
81 }
82 return false;
83 }
84
85 static public void main(String[] args) throws Exception {
86 if (Platform.isServer()) {
87 int[] src = new int[10];
88 Object src_obj = new Object();
89 Method method_m1 = TestArrayCopyNoInitDeopt.class.getMethod("m1", Object.class);
90 Method method_m2 = TestArrayCopyNoInitDeopt.class.getMethod("m2", Object.class);
91
92 // Warm up
93 for (int i = 0; i < 20000; i++) {
94 m1(src);
95 }
96
97 // And make sure m1 is compiled by C2
98 WHITE_BOX.enqueueMethodForCompilation(method_m1, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
99
100 if (!WHITE_BOX.isMethodCompiled(method_m1)) {
101 throw new RuntimeException("m1 not compiled");
102 }
103
104 // should deoptimize for type check
105 if (!deoptimize(method_m1, src_obj)) {
106 throw new RuntimeException("m1 not deoptimized");
107 }
108
109 WHITE_BOX.enqueueMethodForCompilation(method_m1, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
110
111 if (!WHITE_BOX.isMethodCompiled(method_m1)) {
112 throw new RuntimeException("m1 not recompiled");
113 }
114
115 if (deoptimize(method_m1, src_obj)) {
116 throw new RuntimeException("m1 deoptimized again");
117 }
118
119 if (WHITE_BOX.getUintxVMFlag("TypeProfileLevel") == 20) {
120 // Same test as above but with speculative types
121
122 // Warm up & make sure we collect type profiling
123 for (int i = 0; i < 20000; i++) {
124 m2(src);
125 }
126
127 // And make sure m2 is compiled by C2
128 WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
129
130 if (!WHITE_BOX.isMethodCompiled(method_m2)) {
131 throw new RuntimeException("m2 not compiled");
132 }
133
134 // should deoptimize for speculative type check
135 if (!deoptimize(method_m2, src_obj)) {
136 throw new RuntimeException("m2 not deoptimized");
137 }
138
139 WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
140
141 if (!WHITE_BOX.isMethodCompiled(method_m2)) {
142 throw new RuntimeException("m2 not recompiled");
143 }
144
145 // should deoptimize for actual type check
146 if (!deoptimize(method_m2, src_obj)) {
147 throw new RuntimeException("m2 not deoptimized");
148 }
149
150 WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
151
152 if (!WHITE_BOX.isMethodCompiled(method_m2)) {
153 throw new RuntimeException("m2 not recompiled");
154 }
155
156 if (deoptimize(method_m2, src_obj)) {
157 throw new RuntimeException("m2 deoptimized again");
158 }
159 }
160 }
161 }
162 }