1 /*
2 * Copyright (c) 2016, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 /*
27 * @test
28 * @summary tests on constant folding of unsafe get operations from stable arrays
29 * @library /testlibrary /test/lib
30 * @ignore 8151137
31 *
32 * @requires vm.flavor != "client"
33 *
34 * @run main/bootclasspath -XX:+UnlockDiagnosticVMOptions
35 * -Xbatch -XX:-TieredCompilation
36 * -XX:+FoldStableValues
37 * -XX:CompileCommand=dontinline,*Test::test*
38 * UnsafeGetStableArrayElement
39 */
40 import jdk.internal.misc.Unsafe;
41 import jdk.internal.vm.annotation.Stable;
42 import java.util.concurrent.Callable;
43
44 import static jdk.internal.misc.Unsafe.*;
45 import static jdk.test.lib.Asserts.*;
46 import static jdk.test.lib.Platform;
47
48 public class UnsafeGetStableArrayElement {
49 @Stable static final boolean[] STABLE_BOOLEAN_ARRAY = new boolean[16];
50 @Stable static final byte[] STABLE_BYTE_ARRAY = new byte[16];
51 @Stable static final short[] STABLE_SHORT_ARRAY = new short[8];
52 @Stable static final char[] STABLE_CHAR_ARRAY = new char[8];
53 @Stable static final int[] STABLE_INT_ARRAY = new int[4];
54 @Stable static final long[] STABLE_LONG_ARRAY = new long[2];
55 @Stable static final float[] STABLE_FLOAT_ARRAY = new float[4];
56 @Stable static final double[] STABLE_DOUBLE_ARRAY = new double[2];
57 @Stable static final Object[] STABLE_OBJECT_ARRAY = new Object[4];
58
59 static {
60 Setter.reset();
61 }
62 static final Unsafe U = Unsafe.getUnsafe();
63
64 static class Setter {
65 private static void setZ(boolean defaultVal) { STABLE_BOOLEAN_ARRAY[0] = defaultVal ? false : true; }
66 private static void setB(boolean defaultVal) { STABLE_BYTE_ARRAY[0] = defaultVal ? 0 : Byte.MAX_VALUE; }
67 private static void setS(boolean defaultVal) { STABLE_SHORT_ARRAY[0] = defaultVal ? 0 : Short.MAX_VALUE; }
68 private static void setC(boolean defaultVal) { STABLE_CHAR_ARRAY[0] = defaultVal ? 0 : Character.MAX_VALUE; }
69 private static void setI(boolean defaultVal) { STABLE_INT_ARRAY[0] = defaultVal ? 0 : Integer.MAX_VALUE; }
70 private static void setJ(boolean defaultVal) { STABLE_LONG_ARRAY[0] = defaultVal ? 0 : Long.MAX_VALUE; }
71 private static void setF(boolean defaultVal) { STABLE_FLOAT_ARRAY[0] = defaultVal ? 0 : Float.MAX_VALUE; }
72 private static void setD(boolean defaultVal) { STABLE_DOUBLE_ARRAY[0] = defaultVal ? 0 : Double.MAX_VALUE; }
73 private static void setL(boolean defaultVal) { STABLE_OBJECT_ARRAY[0] = defaultVal ? null : new Object(); }
74
75 static void reset() {
76 setZ(false);
77 setB(false);
78 setS(false);
79 setC(false);
80 setI(false);
81 setJ(false);
82 setF(false);
83 setD(false);
84 setL(false);
85 }
86 }
87
88 static class Test {
89 static void changeZ() { Setter.setZ(true); }
90 static void changeB() { Setter.setB(true); }
91 static void changeS() { Setter.setS(true); }
92 static void changeC() { Setter.setC(true); }
93 static void changeI() { Setter.setI(true); }
94 static void changeJ() { Setter.setJ(true); }
95 static void changeF() { Setter.setF(true); }
96 static void changeD() { Setter.setD(true); }
97 static void changeL() { Setter.setL(true); }
98
99 static boolean testZ_Z() { return U.getBoolean(STABLE_BOOLEAN_ARRAY, ARRAY_BOOLEAN_BASE_OFFSET); }
100 static byte testZ_B() { return U.getByte( STABLE_BOOLEAN_ARRAY, ARRAY_BOOLEAN_BASE_OFFSET); }
101 static short testZ_S() { return U.getShort( STABLE_BOOLEAN_ARRAY, ARRAY_BOOLEAN_BASE_OFFSET); }
102 static char testZ_C() { return U.getChar( STABLE_BOOLEAN_ARRAY, ARRAY_BOOLEAN_BASE_OFFSET); }
103 static int testZ_I() { return U.getInt( STABLE_BOOLEAN_ARRAY, ARRAY_BOOLEAN_BASE_OFFSET); }
104 static long testZ_J() { return U.getLong( STABLE_BOOLEAN_ARRAY, ARRAY_BOOLEAN_BASE_OFFSET); }
105 static float testZ_F() { return U.getFloat( STABLE_BOOLEAN_ARRAY, ARRAY_BOOLEAN_BASE_OFFSET); }
106 static double testZ_D() { return U.getDouble( STABLE_BOOLEAN_ARRAY, ARRAY_BOOLEAN_BASE_OFFSET); }
107
108 static boolean testB_Z() { return U.getBoolean(STABLE_BYTE_ARRAY, ARRAY_BYTE_BASE_OFFSET); }
109 static byte testB_B() { return U.getByte( STABLE_BYTE_ARRAY, ARRAY_BYTE_BASE_OFFSET); }
110 static short testB_S() { return U.getShort( STABLE_BYTE_ARRAY, ARRAY_BYTE_BASE_OFFSET); }
111 static char testB_C() { return U.getChar( STABLE_BYTE_ARRAY, ARRAY_BYTE_BASE_OFFSET); }
112 static int testB_I() { return U.getInt( STABLE_BYTE_ARRAY, ARRAY_BYTE_BASE_OFFSET); }
113 static long testB_J() { return U.getLong( STABLE_BYTE_ARRAY, ARRAY_BYTE_BASE_OFFSET); }
114 static float testB_F() { return U.getFloat( STABLE_BYTE_ARRAY, ARRAY_BYTE_BASE_OFFSET); }
115 static double testB_D() { return U.getDouble( STABLE_BYTE_ARRAY, ARRAY_BYTE_BASE_OFFSET); }
116
117 static boolean testS_Z() { return U.getBoolean(STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET); }
118 static byte testS_B() { return U.getByte( STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET); }
119 static short testS_S() { return U.getShort( STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET); }
120 static char testS_C() { return U.getChar( STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET); }
121 static int testS_I() { return U.getInt( STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET); }
122 static long testS_J() { return U.getLong( STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET); }
123 static float testS_F() { return U.getFloat( STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET); }
124 static double testS_D() { return U.getDouble( STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET); }
125
126 static boolean testC_Z() { return U.getBoolean(STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET); }
127 static byte testC_B() { return U.getByte( STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET); }
128 static short testC_S() { return U.getShort( STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET); }
129 static char testC_C() { return U.getChar( STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET); }
130 static int testC_I() { return U.getInt( STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET); }
131 static long testC_J() { return U.getLong( STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET); }
132 static float testC_F() { return U.getFloat( STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET); }
133 static double testC_D() { return U.getDouble( STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET); }
134
135 static boolean testI_Z() { return U.getBoolean(STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET); }
136 static byte testI_B() { return U.getByte( STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET); }
137 static short testI_S() { return U.getShort( STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET); }
138 static char testI_C() { return U.getChar( STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET); }
139 static int testI_I() { return U.getInt( STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET); }
140 static long testI_J() { return U.getLong( STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET); }
141 static float testI_F() { return U.getFloat( STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET); }
142 static double testI_D() { return U.getDouble( STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET); }
143
144 static boolean testJ_Z() { return U.getBoolean(STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET); }
145 static byte testJ_B() { return U.getByte( STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET); }
146 static short testJ_S() { return U.getShort( STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET); }
147 static char testJ_C() { return U.getChar( STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET); }
148 static int testJ_I() { return U.getInt( STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET); }
149 static long testJ_J() { return U.getLong( STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET); }
150 static float testJ_F() { return U.getFloat( STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET); }
151 static double testJ_D() { return U.getDouble( STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET); }
152
153 static boolean testF_Z() { return U.getBoolean(STABLE_FLOAT_ARRAY, ARRAY_FLOAT_BASE_OFFSET); }
154 static byte testF_B() { return U.getByte( STABLE_FLOAT_ARRAY, ARRAY_FLOAT_BASE_OFFSET); }
155 static short testF_S() { return U.getShort( STABLE_FLOAT_ARRAY, ARRAY_FLOAT_BASE_OFFSET); }
156 static char testF_C() { return U.getChar( STABLE_FLOAT_ARRAY, ARRAY_FLOAT_BASE_OFFSET); }
157 static int testF_I() { return U.getInt( STABLE_FLOAT_ARRAY, ARRAY_FLOAT_BASE_OFFSET); }
158 static long testF_J() { return U.getLong( STABLE_FLOAT_ARRAY, ARRAY_FLOAT_BASE_OFFSET); }
159 static float testF_F() { return U.getFloat( STABLE_FLOAT_ARRAY, ARRAY_FLOAT_BASE_OFFSET); }
160 static double testF_D() { return U.getDouble( STABLE_FLOAT_ARRAY, ARRAY_FLOAT_BASE_OFFSET); }
161
162 static boolean testD_Z() { return U.getBoolean(STABLE_DOUBLE_ARRAY, ARRAY_DOUBLE_BASE_OFFSET); }
163 static byte testD_B() { return U.getByte( STABLE_DOUBLE_ARRAY, ARRAY_DOUBLE_BASE_OFFSET); }
164 static short testD_S() { return U.getShort( STABLE_DOUBLE_ARRAY, ARRAY_DOUBLE_BASE_OFFSET); }
165 static char testD_C() { return U.getChar( STABLE_DOUBLE_ARRAY, ARRAY_DOUBLE_BASE_OFFSET); }
166 static int testD_I() { return U.getInt( STABLE_DOUBLE_ARRAY, ARRAY_DOUBLE_BASE_OFFSET); }
167 static long testD_J() { return U.getLong( STABLE_DOUBLE_ARRAY, ARRAY_DOUBLE_BASE_OFFSET); }
168 static float testD_F() { return U.getFloat( STABLE_DOUBLE_ARRAY, ARRAY_DOUBLE_BASE_OFFSET); }
169 static double testD_D() { return U.getDouble( STABLE_DOUBLE_ARRAY, ARRAY_DOUBLE_BASE_OFFSET); }
170
171 static Object testL_L() { return U.getObject( STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); }
172 static boolean testL_Z() { return U.getBoolean(STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); }
173 static byte testL_B() { return U.getByte( STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); }
174 static short testL_S() { return U.getShort( STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); }
175 static char testL_C() { return U.getChar( STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); }
176 static int testL_I() { return U.getInt( STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); }
177 static long testL_J() { return U.getLong( STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); }
178 static float testL_F() { return U.getFloat( STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); }
179 static double testL_D() { return U.getDouble( STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); }
180
181 static short testS_U() { return U.getShortUnaligned(STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET + 1); }
182 static char testC_U() { return U.getCharUnaligned( STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET + 1); }
183 static int testI_U() { return U.getIntUnaligned( STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET + 1); }
184 static long testJ_U() { return U.getLongUnaligned( STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET + 1); }
185 }
186
187 static void run(Callable<?> c) throws Exception {
188 run(c, null, null);
189 }
190
191 static void run(Callable<?> c, Runnable sameResultAction, Runnable changeResultAction) throws Exception {
192 Object first = c.call();
193
194 // Trigger compilation.
195 for (int i = 0; i < 20_000; i++) {
196 // Don't compare results here, since most of Test::testL_* results vary across iterations (due to GC).
197 c.call();
198 }
199
200 if (sameResultAction != null) {
201 sameResultAction.run();
202 assertEQ(first, c.call());
203 }
204
205 if (changeResultAction != null) {
206 changeResultAction.run();
207 assertNE(first, c.call());
208 assertEQ(c.call(), c.call());
209 }
210 }
211
212 static void testMatched(Callable<?> c, Runnable setDefaultAction) throws Exception {
213 run(c, setDefaultAction, null);
214 Setter.reset();
215 }
216
217 static void testMismatched(Callable<?> c, Runnable setDefaultAction) throws Exception {
218 run(c, null, setDefaultAction);
219 Setter.reset();
220 }
221
222 public static void main(String[] args) throws Exception {
223 if (Platform.isServer()) {
224 test();
225 }
226 }
227
228 static void test() throws Exception {
229 // boolean[], aligned accesses
230 testMatched( Test::testZ_Z, Test::changeZ);
231 testMismatched(Test::testZ_B, Test::changeZ);
232 testMismatched(Test::testZ_S, Test::changeZ);
233 testMismatched(Test::testZ_C, Test::changeZ);
234 testMismatched(Test::testZ_I, Test::changeZ);
235 testMismatched(Test::testZ_J, Test::changeZ);
236 testMismatched(Test::testZ_F, Test::changeZ);
237 testMismatched(Test::testZ_D, Test::changeZ);
238
239 // byte[], aligned accesses
240 testMismatched(Test::testB_Z, Test::changeB);
241 testMatched( Test::testB_B, Test::changeB);
242 testMismatched(Test::testB_S, Test::changeB);
243 testMismatched(Test::testB_C, Test::changeB);
244 testMismatched(Test::testB_I, Test::changeB);
245 testMismatched(Test::testB_J, Test::changeB);
246 testMismatched(Test::testB_F, Test::changeB);
247 testMismatched(Test::testB_D, Test::changeB);
248
249 // short[], aligned accesses
250 testMismatched(Test::testS_Z, Test::changeS);
251 testMismatched(Test::testS_B, Test::changeS);
252 testMatched( Test::testS_S, Test::changeS);
253 testMismatched(Test::testS_C, Test::changeS);
254 testMismatched(Test::testS_I, Test::changeS);
255 testMismatched(Test::testS_J, Test::changeS);
256 testMismatched(Test::testS_F, Test::changeS);
257 testMismatched(Test::testS_D, Test::changeS);
258
259 // char[], aligned accesses
260 testMismatched(Test::testC_Z, Test::changeC);
261 testMismatched(Test::testC_B, Test::changeC);
262 testMismatched(Test::testC_S, Test::changeC);
263 testMatched( Test::testC_C, Test::changeC);
264 testMismatched(Test::testC_I, Test::changeC);
265 testMismatched(Test::testC_J, Test::changeC);
266 testMismatched(Test::testC_F, Test::changeC);
267 testMismatched(Test::testC_D, Test::changeC);
268
269 // int[], aligned accesses
270 testMismatched(Test::testI_Z, Test::changeI);
271 testMismatched(Test::testI_B, Test::changeI);
272 testMismatched(Test::testI_S, Test::changeI);
273 testMismatched(Test::testI_C, Test::changeI);
274 testMatched( Test::testI_I, Test::changeI);
275 testMismatched(Test::testI_J, Test::changeI);
276 testMismatched(Test::testI_F, Test::changeI);
277 testMismatched(Test::testI_D, Test::changeI);
278
279 // long[], aligned accesses
280 testMismatched(Test::testJ_Z, Test::changeJ);
281 testMismatched(Test::testJ_B, Test::changeJ);
282 testMismatched(Test::testJ_S, Test::changeJ);
283 testMismatched(Test::testJ_C, Test::changeJ);
284 testMismatched(Test::testJ_I, Test::changeJ);
285 testMatched( Test::testJ_J, Test::changeJ);
286 testMismatched(Test::testJ_F, Test::changeJ);
287 testMismatched(Test::testJ_D, Test::changeJ);
288
289 // float[], aligned accesses
290 testMismatched(Test::testF_Z, Test::changeF);
291 testMismatched(Test::testF_B, Test::changeF);
292 testMismatched(Test::testF_S, Test::changeF);
293 testMismatched(Test::testF_C, Test::changeF);
294 testMismatched(Test::testF_I, Test::changeF);
295 testMismatched(Test::testF_J, Test::changeF);
296 testMatched( Test::testF_F, Test::changeF);
297 testMismatched(Test::testF_D, Test::changeF);
298
299 // double[], aligned accesses
300 testMismatched(Test::testD_Z, Test::changeD);
301 testMismatched(Test::testD_B, Test::changeD);
302 testMismatched(Test::testD_S, Test::changeD);
303 testMismatched(Test::testD_C, Test::changeD);
304 testMismatched(Test::testD_I, Test::changeD);
305 testMismatched(Test::testD_J, Test::changeD);
306 testMismatched(Test::testD_F, Test::changeD);
307 testMatched( Test::testD_D, Test::changeD);
308
309 // Object[], aligned accesses
310 testMismatched(Test::testL_J, Test::changeL); // long & double are always as large as an OOP
311 testMismatched(Test::testL_D, Test::changeL);
312 testMatched( Test::testL_L, Test::changeL);
313
314 // Unaligned accesses
315 testMismatched(Test::testS_U, Test::changeS);
316 testMismatched(Test::testC_U, Test::changeC);
317 testMismatched(Test::testI_U, Test::changeI);
318 testMismatched(Test::testJ_U, Test::changeJ);
319
320 // No way to reliably check the expected behavior:
321 // (1) OOPs change during GC;
322 // (2) there's no way to reliably change some part of an OOP (e.g., when reading a byte from it).
323 //
324 // Just trigger the compilation hoping to catch any problems with asserts.
325 run(Test::testL_B);
326 run(Test::testL_Z);
327 run(Test::testL_S);
328 run(Test::testL_C);
329 run(Test::testL_I);
330 run(Test::testL_F);
331 }
332 }