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/jdk.internal.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 private static final int TIERED_STOP_AT_LEVEL = WHITE_BOX.getIntxVMFlag("TieredStopAtLevel").intValue();
76
77 static boolean deoptimize(Method method, Object src_obj) throws Exception {
78 for (int i = 0; i < 10; i++) {
79 method.invoke(null, src_obj);
80 if (!WHITE_BOX.isMethodCompiled(method)) {
81 return true;
82 }
83 }
84 return false;
85 }
86
87 static public void main(String[] args) throws Exception {
88 // Only execute if C2 is available
89 if (Platform.isServer() &&
90 TIERED_STOP_AT_LEVEL == CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION) {
91 int[] src = new int[10];
92 Object src_obj = new Object();
93 Method method_m1 = TestArrayCopyNoInitDeopt.class.getMethod("m1", Object.class);
94 Method method_m2 = TestArrayCopyNoInitDeopt.class.getMethod("m2", Object.class);
95
96 // Warm up
97 for (int i = 0; i < 20000; i++) {
98 m1(src);
99 }
100
101 // And make sure m1 is compiled by C2
102 WHITE_BOX.enqueueMethodForCompilation(method_m1, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
103
104 if (!WHITE_BOX.isMethodCompiled(method_m1)) {
105 throw new RuntimeException("m1 not compiled");
106 }
107
108 // should deoptimize for type check
109 if (!deoptimize(method_m1, src_obj)) {
110 throw new RuntimeException("m1 not deoptimized");
111 }
112
113 WHITE_BOX.enqueueMethodForCompilation(method_m1, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
114
115 if (!WHITE_BOX.isMethodCompiled(method_m1)) {
116 throw new RuntimeException("m1 not recompiled");
117 }
118
119 if (deoptimize(method_m1, src_obj)) {
120 throw new RuntimeException("m1 deoptimized again");
121 }
122
123 if (WHITE_BOX.getUintxVMFlag("TypeProfileLevel") == 20) {
124 // Same test as above but with speculative types
125
126 // Warm up & make sure we collect type profiling
127 for (int i = 0; i < 20000; i++) {
128 m2(src);
129 }
130
131 // And make sure m2 is compiled by C2
132 WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
133
134 if (!WHITE_BOX.isMethodCompiled(method_m2)) {
135 throw new RuntimeException("m2 not compiled");
136 }
137
138 // should deoptimize for speculative type check
139 if (!deoptimize(method_m2, src_obj)) {
140 throw new RuntimeException("m2 not deoptimized");
141 }
142
143 WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
144
145 if (!WHITE_BOX.isMethodCompiled(method_m2)) {
146 throw new RuntimeException("m2 not recompiled");
147 }
148
149 // should deoptimize for actual type check
150 if (!deoptimize(method_m2, src_obj)) {
151 throw new RuntimeException("m2 not deoptimized");
152 }
153
154 WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
155
156 if (!WHITE_BOX.isMethodCompiled(method_m2)) {
157 throw new RuntimeException("m2 not recompiled");
158 }
159
160 if (deoptimize(method_m2, src_obj)) {
161 throw new RuntimeException("m2 deoptimized again");
162 }
163 }
164 }
165 }
166 }