1 /*
2 * Copyright (c) 2017, 2019, 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 import java.lang.management.MemoryPoolMXBean;
26
27 import sun.hotspot.WhiteBox;
28 import jdk.test.lib.Asserts;
29
30 /**
31 * @test ValueTypeDensity
32 * @summary Heap density test for ValueTypes
33 * @library /test/lib
34 * @compile -XDemitQtypes -XDenableValueTypes -XDallowWithFieldOperator ValueTypeDensity.java
35 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
36 * @run main/othervm -Xint -XX:ValueArrayElemMaxFlatSize=-1
37 * -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
38 * -XX:+WhiteBoxAPI ValueTypeDensity
39 * @run main/othervm -Xcomp -XX:ValueArrayElemMaxFlatSize=-1
40 * -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
41 * -XX:+WhiteBoxAPI ValueTypeDensity
42 * @run main/othervm -Xbatch -XX:ForceNonTearable=*
43 * -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
44 * -XX:+WhiteBoxAPI ValueTypeDensity
45 */
46
47 public class ValueTypeDensity {
48
49 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
50
51 public ValueTypeDensity() {
52 if (WHITE_BOX.getIntxVMFlag("ValueArrayElemMaxFlatSize") != -1) {
53 throw new IllegalStateException("ValueArrayElemMaxFlatSize should be -1");
54 }
55 }
56
57 interface LocalDate {
58 public int getYear();
59 public short getMonth();
60 public short getDay();
61 }
62
63 interface LocalTime {
64 public byte getHour();
65 public byte getMinute();
66 public byte getSecond();
67 public int getNano();
68 }
69
70 interface LocalDateTime extends LocalDate, LocalTime {}
71
72 static final inline class LocalDateValue implements LocalDate {
73 final int year;
74 final short month;
75 final short day;
76
77 LocalDateValue() {
78 year = 0;
79 month = 0;
80 day = 0;
81 }
82
83 public int getYear() { return year; }
84 public short getMonth() { return month; }
85 public short getDay() { return day; }
86
87 public static LocalDateValue create(int year, short month, short day) {
88 LocalDateValue localDate = LocalDateValue.default;
89 localDate = __WithField(localDate.year, year);
90 localDate = __WithField(localDate.month, month);
91 localDate = __WithField(localDate.day, day);
92 return localDate;
93 }
94 }
95
96 static final inline class LocalTimeValue implements LocalTime {
97 final byte hour;
98 final byte minute;
99 final byte second;
100 final int nano;
101
102 LocalTimeValue() {
103 hour = 0;
104 minute = 0;
105 second = 0;
106 nano = 0;
107 }
108
109 public byte getHour() { return hour; }
110 public byte getMinute() { return minute; }
111 public byte getSecond() { return second; }
112 public int getNano() { return nano; }
113
114 public static LocalTimeValue create(byte hour, byte minute, byte second, int nano) {
115 LocalTimeValue localTime = LocalTimeValue.default;
116 localTime = __WithField(localTime.hour, hour);
117 localTime = __WithField(localTime.minute, minute);
118 localTime = __WithField(localTime.second, second);
119 localTime = __WithField(localTime.nano, nano);
120 return localTime;
121 }
122 }
123
124 static final inline class LocalDateTimeValue implements LocalDateTime {
125 final LocalDateValue date;
126 final LocalTimeValue time;
127
128 LocalDateTimeValue() {
129 // Well this is a little weird...
130 date = LocalDateValue.create(0, (short)0, (short)0);
131 time = LocalTimeValue.create((byte)0, (byte)0, (byte)0, 0);
132 }
133
134 public int getYear() { return date.year; }
135 public short getMonth() { return date.month; }
136 public short getDay() { return date.day; }
137
138 public byte getHour() { return time.hour; }
139 public byte getMinute() { return time.minute; }
140 public byte getSecond() { return time.second; }
141 public int getNano() { return time.nano; }
142
143 public static LocalDateTimeValue create(LocalDateValue date, LocalTimeValue time) {
144 LocalDateTimeValue localDateTime = LocalDateTimeValue.default;
145 localDateTime = __WithField(localDateTime.date, date);
146 localDateTime = __WithField(localDateTime.time, time);
147 return localDateTime;
148 }
149 }
150
151 static final class LocalDateClass implements LocalDate {
152 final int year;
153 final short month;
154 final short day;
155
156 LocalDateClass(int year, short month, short day) {
157 this.year = year;
158 this.month = month;
159 this.day = day;
160 }
161
162 public int getYear() { return year; }
163 public short getMonth() { return month; }
164 public short getDay() { return day; }
165 }
166
167 static final class LocalTimeClass implements LocalTime {
168 final byte hour;
169 final byte minute;
170 final byte second;
171 final int nano;
172
173 LocalTimeClass(byte hour, byte minute, byte second, int nano) {
174 this.hour = hour;
175 this.minute = minute;
176 this.second = second;
177 this.nano = nano;
178 }
179
180 public byte getHour() { return hour; }
181 public byte getMinute() { return minute; }
182 public byte getSecond() { return second; }
183 public int getNano() { return nano; }
184 }
185
186 static final class LocalDateTimeClass implements LocalDateTime {
187 final LocalDateClass date;
188 final LocalTimeClass time;
189
190 LocalDateTimeClass(LocalDateClass date, LocalTimeClass time) {
191 this.date = date;
192 this.time = time;
193 }
194
195 public LocalDateClass getDate() { return date; }
196 public LocalTimeClass getTime() { return time; }
197
198 public int getYear() { return date.year; }
199 public short getMonth() { return date.month; }
200 public short getDay() { return date.day; }
201
202 public byte getHour() { return time.hour; }
203 public byte getMinute() { return time.minute; }
204 public byte getSecond() { return time.second; }
205 public int getNano() { return time.nano; }
206 }
207
208 public void ensureArraySizeWin() {
209 int arrayLength = 1000;
210 System.out.println("ensureArraySizeWin for length " + arrayLength);
211 LocalDateTimeClass[] objectArray = new LocalDateTimeClass[arrayLength];
212 for (int i = 0; i < arrayLength; i++) {
213 objectArray[i] = new LocalDateTimeClass(new LocalDateClass(0, (short)0, (short)0),
214 new LocalTimeClass((byte)0, (byte)0, (byte)0, 0));
215 }
216
217 long objectArraySize = WHITE_BOX.getObjectSize(objectArray);
218 System.out.println("Empty object array size: " + objectArraySize);
219 objectArraySize += (arrayLength *
220 (WHITE_BOX.getObjectSize(objectArray[0]) +
221 WHITE_BOX.getObjectSize(objectArray[0].getDate()) +
222 WHITE_BOX.getObjectSize(objectArray[0].getTime())));
223
224 LocalDateTimeValue[] valueArray = new LocalDateTimeValue[arrayLength];
225 // CMH: add "isFlatValueArray" to WhiteBox API, to ensure we are correctly account size
226
227 long valueArraySize = WHITE_BOX.getObjectSize(valueArray);
228 System.out.println("Object array and elements: " + objectArraySize + " versus Value Array: " + valueArraySize);
229 Asserts.assertLessThan(valueArraySize, objectArraySize, "Value array accounts for more heap than object array + elements !");
230 }
231
232 public void test() {
233 ensureArraySizeWin();
234 }
235
236 public static void main(String[] args) {
237 new ValueTypeDensity().test();
238 }
239
240 }
241