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/jdk.internal.misc
30 * java.management
31 * @build TestArrayCopyNoInitDeopt
32 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
33 * 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 import sun.hotspot.WhiteBox;
40 import sun.hotspot.code.NMethod;
41 import jdk.test.lib.Platform;
42 import java.lang.reflect.*;
43 import compiler.whitebox.CompilerWhiteBoxTest;
44
45 public class TestArrayCopyNoInitDeopt {
46
47 public static int[] m1(Object src) {
48 if (src == null) return null;
49 int[] dest = new int[10];
50 try {
51 System.arraycopy(src, 0, dest, 0, 10);
52 } catch (ArrayStoreException npe) {
53 }
54 return dest;
55 }
56
57 static Object m2_src(Object src) {
58 return src;
59 }
60
61 public static int[] m2(Object src) {
62 if (src == null) return null;
63 src = m2_src(src);
64 int[] dest = new int[10];
65 try {
66 System.arraycopy(src, 0, dest, 0, 10);
67 } catch (ArrayStoreException npe) {
68 }
69 return dest;
70 }
71
72 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
73 private static final int TIERED_STOP_AT_LEVEL = WHITE_BOX.getIntxVMFlag("TieredStopAtLevel").intValue();
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 // Only execute if C2 is available
87 if (Platform.isServer() &&
88 TIERED_STOP_AT_LEVEL == CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION) {
89 int[] src = new int[10];
90 Object src_obj = new Object();
91 Method method_m1 = TestArrayCopyNoInitDeopt.class.getMethod("m1", Object.class);
92 Method method_m2 = TestArrayCopyNoInitDeopt.class.getMethod("m2", Object.class);
93
94 // Warm up
95 for (int i = 0; i < 20000; i++) {
96 m1(src);
97 }
98
99 // And make sure m1 is compiled by C2
100 WHITE_BOX.enqueueMethodForCompilation(method_m1, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
101
102 if (!WHITE_BOX.isMethodCompiled(method_m1)) {
103 throw new RuntimeException("m1 not compiled");
104 }
105
106 // should deoptimize for type check
107 if (!deoptimize(method_m1, src_obj)) {
108 throw new RuntimeException("m1 not deoptimized");
109 }
110
111 WHITE_BOX.enqueueMethodForCompilation(method_m1, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
112
113 if (!WHITE_BOX.isMethodCompiled(method_m1)) {
114 throw new RuntimeException("m1 not recompiled");
115 }
116
117 if (deoptimize(method_m1, src_obj)) {
118 throw new RuntimeException("m1 deoptimized again");
119 }
120
121 if (WHITE_BOX.getUintxVMFlag("TypeProfileLevel") == 20) {
122 // Same test as above but with speculative types
123
124 // Warm up & make sure we collect type profiling
125 for (int i = 0; i < 20000; i++) {
126 m2(src);
127 }
128
129 // And make sure m2 is compiled by C2
130 WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
131
132 if (!WHITE_BOX.isMethodCompiled(method_m2)) {
133 throw new RuntimeException("m2 not compiled");
134 }
135
136 // should deoptimize for speculative type check
137 if (!deoptimize(method_m2, src_obj)) {
138 throw new RuntimeException("m2 not deoptimized");
139 }
140
141 WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
142
143 if (!WHITE_BOX.isMethodCompiled(method_m2)) {
144 throw new RuntimeException("m2 not recompiled");
145 }
146
147 // should deoptimize for actual type check
148 if (!deoptimize(method_m2, src_obj)) {
149 throw new RuntimeException("m2 not deoptimized");
150 }
151
152 WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
153
154 if (!WHITE_BOX.isMethodCompiled(method_m2)) {
155 throw new RuntimeException("m2 not recompiled");
156 }
157
158 if (deoptimize(method_m2, src_obj)) {
159 throw new RuntimeException("m2 deoptimized again");
160 }
161 }
162 }
163 }
164 }