1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
/*
* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @requires vm.flavor == "server"
*
* @run main/othervm -Xbatch -XX:-TieredCompilation -XX:+PrintCompilation -XX:+UnlockDiagnosticVMOptions -XX:+PrintInlining
* -XX:CompileCommand=quiet -XX:CompileCommand=compileonly,*::test
* compiler.c2.UpcastTest
*/
package compiler.c2;
public class UpcastTest {
static class Test1 {
interface I { void m(); }
static abstract class AC implements I {
public void m() {}
}
static class T extends AC {
int i = 0;
static {
// Run the test while T is not fully initialized yet.
for (int i = 0; i < 20_000; i++) {
test(new T(){});
test(new T(){});
test(new T(){});
}
}
}
static void test(T t) {
// Interface I has unique implementor AC.
// CHA reports AC::m and the callee is guarded by a type check against its holder (AC).
((I)t).m(); // invokeinterface I.m w/ polluted profile
// No upcasts (to class AC) on t after the call.
// Otherwise, field access fires an assert.
t.i = 1;
}
}
static class Test2 {
interface I { void m(); }
interface J extends I {
default void m() {}
}
static abstract class AC implements I {
}
static abstract class T extends AC {
int i = 0;
static {
// Run the test while T is not fully initialized yet.
for (int i = 0; i < 20_000; i++) {
test(new T1(){});
test(new T2(){});
test(new T3(){});
}
}
}
static class T1 extends T implements J {}
static class T2 extends T implements J {}
static class T3 extends T implements J {}
static void test(T t) {
// Interface I has unique implementor AC.
// CHA reports J::m and the callee is guarded by a type check against its holder (J).
((I)t).m(); // invokeinterface I.m w/ polluted profile
// No upcasts (to interface J) on t after the call.
// Otherwise, field access fires an assert.
t.i = 1;
}
}
static class Test3 {
interface I {
default void m1() { m2(); }
void m2();
}
interface J extends I {
default void m2() {}
}
static abstract class AC implements I {}
static class T extends AC implements J {
int i = 0;
}
static void test(T t) {
t.m1(); // invokeinterface I.m w/ polluted profile
// No upcasts (to interface J) on t after the call.
// Otherwise, field access fires an assert.
t.i = 1;
}
static void run() {
for (int i = 0; i < 20_000; i++) {
test(new T() {});
test(new T() {});
test(new T() {});
}
}
}
static class Test4 {
interface I { default void m() {}}
static class T {
int i = 0;
}
static class D extends T implements I {}
static void test(T t) {
if (t instanceof I) {
((I)t).m();
// No upcasts (to interface J) on t after the call.
// Otherwise, field access fires an assert.
t.i = 1;
} else {
throw new InternalError();
}
}
static void run() {
for (int i = 0; i < 20_000; i++) {
test(new D() {});
test(new D() {});
test(new D() {});
}
}
}
public static void main(String[] args) {
new Test1.T(); // trigger initialization of class T
new Test2.T1(); // trigger initialization of class T
Test3.run();
Test4.run();
}
}
|
