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 /
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 import compiler.whitebox.CompilerWhiteBoxTest;
46
47 public class TestArrayCopyNoInitDeopt {
48
49 public static int[] m1(Object src) {
50 if (src == null) return null;
51 int[] dest = new int[10];
52 try {
53 System.arraycopy(src, 0, dest, 0, 10);
54 } catch (ArrayStoreException npe) {
55 }
56 return dest;
57 }
58
59 static Object m2_src(Object src) {
60 return src;
61 }
62
63 public static int[] m2(Object src) {
64 if (src == null) return null;
65 src = m2_src(src);
66 int[] dest = new int[10];
67 try {
68 System.arraycopy(src, 0, dest, 0, 10);
69 } catch (ArrayStoreException npe) {
70 }
71 return dest;
72 }
73
74 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
75
76 static boolean deoptimize(Method method, Object src_obj) throws Exception {
77 for (int i = 0; i < 10; i++) {
78 method.invoke(null, src_obj);
79 if (!WHITE_BOX.isMethodCompiled(method)) {
80 return true;
81 }
82 }
83 return false;
84 }
85
86 static public void main(String[] args) throws Exception {
87 if (Platform.isServer()) {
88 int[] src = new int[10];
89 Object src_obj = new Object();
90 Method method_m1 = TestArrayCopyNoInitDeopt.class.getMethod("m1", Object.class);
91 Method method_m2 = TestArrayCopyNoInitDeopt.class.getMethod("m2", Object.class);
92
93 // Warm up
94 for (int i = 0; i < 20000; i++) {
95 m1(src);
96 }
97
98 // And make sure m1 is compiled by C2
99 WHITE_BOX.enqueueMethodForCompilation(method_m1, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
100
101 if (!WHITE_BOX.isMethodCompiled(method_m1)) {
102 throw new RuntimeException("m1 not compiled");
103 }
104
105 // should deoptimize for type check
106 if (!deoptimize(method_m1, src_obj)) {
107 throw new RuntimeException("m1 not deoptimized");
108 }
109
110 WHITE_BOX.enqueueMethodForCompilation(method_m1, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
111
112 if (!WHITE_BOX.isMethodCompiled(method_m1)) {
113 throw new RuntimeException("m1 not recompiled");
114 }
115
116 if (deoptimize(method_m1, src_obj)) {
117 throw new RuntimeException("m1 deoptimized again");
118 }
119
120 if (WHITE_BOX.getUintxVMFlag("TypeProfileLevel") == 20) {
121 // Same test as above but with speculative types
122
123 // Warm up & make sure we collect type profiling
124 for (int i = 0; i < 20000; i++) {
125 m2(src);
126 }
127
128 // And make sure m2 is compiled by C2
129 WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
130
131 if (!WHITE_BOX.isMethodCompiled(method_m2)) {
132 throw new RuntimeException("m2 not compiled");
133 }
134
135 // should deoptimize for speculative type check
136 if (!deoptimize(method_m2, src_obj)) {
137 throw new RuntimeException("m2 not deoptimized");
138 }
139
140 WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
141
142 if (!WHITE_BOX.isMethodCompiled(method_m2)) {
143 throw new RuntimeException("m2 not recompiled");
144 }
145
146 // should deoptimize for actual type check
147 if (!deoptimize(method_m2, src_obj)) {
148 throw new RuntimeException("m2 not deoptimized");
149 }
150
151 WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
152
153 if (!WHITE_BOX.isMethodCompiled(method_m2)) {
154 throw new RuntimeException("m2 not recompiled");
155 }
156
157 if (deoptimize(method_m2, src_obj)) {
158 throw new RuntimeException("m2 deoptimized again");
159 }
160 }
161 }
162 }
163 }