1 /*
2 * Copyright (c) 2008, 2018, 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 *
27 * @summary converted from VM Testbase jit/deoptimization/test06.
28 * VM Testbase keywords: [jit, quick]
29 *
30 * @library /vmTestbase
31 * /test/lib
32 * @run driver jdk.test.lib.FileInstaller . .
33 * @build jit.deoptimization.test06.test06
34 * @run driver ExecDriver --java jit.deoptimization.test06.test06
35 */
36
37 package jit.deoptimization.test06;
38
39 import nsk.share.TestFailure;
40
41 /*
42 * Simple recursion that should causes hotspot to deoptimize
43 * used_alot and A.foo and A.bar methods
44 * Expected result for the test is: 0
45 *
46 * run with the -XX:TraceDeoptimization to observ the result.
47 */
48
49 class test06 {
50 public static void main (String[] args) {
51 A obj = new A();
52 for (int index = 0; index < 1; index++) {
53 obj.used_alot();
54 }
55 }
56 }
57
58 class A {
59 static int result = 0;
60
61 public int foo(int index, int iter) {
62 if (index == 0)
63 return result;
64 else if (iter <= sIteration / 2) {
65 result = bar(index) * foo(--index, iter);
66 } else {
67 try {
68 // halfway through the max iterations
69 // create a B. This should cause the
70 // used_alot to be deoptimized
71 // Call b.frame for the remaining part of the recursion
72 if (b == null)
73 b = Class.forName("jit.deoptimization.test06.B").newInstance();
74 result *= ((B)b).foo(index, iter);
75 } catch (Exception x) {
76 throw new TestFailure("Class not found: B");
77 }
78 }
79 return result;
80 }
81
82 // Does nothing but it will let be over written in class C, See Below
83 public int bar(int index) {
84 synchronized (this) {
85 for (int i=0; i<5; i++)
86 index--;
87 }
88 return 0;
89 }
90
91 public void used_alot() {
92 int result = 1;
93
94 for (int index = 1; index <= sIteration; index++) {
95 result *= foo(index, index);
96 }
97
98 if (result != 0) {
99 throw new TestFailure("Result: " + result);
100 }
101 }
102
103 protected Object b = null;
104 protected static final int sIteration = 1000;
105 }
106
107 class B extends A {
108 // Override foo in order to force deoptimization.
109 // Also creates and instance of class C in the last
110 // iteration in order to force A.foo to get deoptimized
111 // otherwise just do something stupid.
112 public int foo(int index, int iter) {
113 // Make sure that this class was created at least
114 // halfway through the iteration. Simple sanity check
115 if (iter < sIteration /2) {
116 throw new TestFailure("class B create to early");
117 }
118
119 if (iter == sIteration) {
120 try {
121 result = ((C)(Class.forName("jit.deoptimization.test06.C").newInstance())).foo(index,iter);
122 result *= ((C)(Class.forName("jit.deoptimization.test06.C").newInstance())).bar(index);
123
124 } catch (Exception x) {
125 throw new TestFailure("Class not found: C");
126 }
127 } else {
128 result = bar(index);
129 if (index != 0)
130 result += foo(--index, iter);
131 }
132 return result;
133 }
134 }
135
136 class C extends B {
137 public int foo(int index, int iter) {
138 for (int i=0; i<iter; i++)
139 result = bar(i);
140
141 try {
142 result = ((D)(Class.forName("jit.deoptimization.test06.D").newInstance())).bar(index);
143 } catch (Exception x) {
144 throw new TestFailure("Class not found: D");
145 }
146 return result;
147 }
148 }
149
150 class D extends C {
151 public int bar(int index) {
152 return 1;
153 }
154 }