Mercurial > hg > graal-jvmci-8
comparison jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotObjectConstantImpl.java @ 22672:1bbd4a7c274b
Rename jdk.internal.jvmci to jdk.vm.ci
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
---|---|
date | Thu, 08 Oct 2015 17:28:41 -0700 |
parents | jvmci/jdk.internal.jvmci.hotspot/src/jdk/internal/jvmci/hotspot/HotSpotObjectConstantImpl.java@c33f0cb02b34 |
children | f102ee538647 |
comparison
equal
deleted
inserted
replaced
22671:97f30e4d0e95 | 22672:1bbd4a7c274b |
---|---|
1 /* | |
2 * Copyright (c) 2009, 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 package jdk.vm.ci.hotspot; | |
24 | |
25 import static jdk.vm.ci.hotspot.HotSpotResolvedObjectTypeImpl.fromObjectClass; | |
26 | |
27 import java.lang.invoke.CallSite; | |
28 import java.lang.invoke.ConstantCallSite; | |
29 import java.lang.invoke.MethodHandle; | |
30 | |
31 import jdk.vm.ci.inittimer.SuppressFBWarnings; | |
32 import jdk.vm.ci.meta.Assumptions; | |
33 import jdk.vm.ci.meta.Constant; | |
34 import jdk.vm.ci.meta.JavaConstant; | |
35 import jdk.vm.ci.meta.JavaKind; | |
36 import jdk.vm.ci.meta.ResolvedJavaType; | |
37 | |
38 /** | |
39 * Represents a constant non-{@code null} object reference, within the compiler and across the | |
40 * compiler/runtime interface. | |
41 */ | |
42 final class HotSpotObjectConstantImpl implements HotSpotObjectConstant, HotSpotProxified { | |
43 | |
44 static JavaConstant forObject(Object object) { | |
45 return forObject(object, false); | |
46 } | |
47 | |
48 static JavaConstant forObject(Object object, boolean compressed) { | |
49 if (object == null) { | |
50 return compressed ? HotSpotCompressedNullConstant.COMPRESSED_NULL : JavaConstant.NULL_POINTER; | |
51 } else { | |
52 return new HotSpotObjectConstantImpl(object, compressed); | |
53 } | |
54 } | |
55 | |
56 static JavaConstant forStableArray(Object object, int stableDimension, boolean isDefaultStable) { | |
57 if (object == null) { | |
58 return JavaConstant.NULL_POINTER; | |
59 } else { | |
60 assert object.getClass().isArray(); | |
61 return new HotSpotObjectConstantImpl(object, false, stableDimension, isDefaultStable); | |
62 } | |
63 } | |
64 | |
65 public static JavaConstant forBoxedValue(JavaKind kind, Object value) { | |
66 if (kind == JavaKind.Object) { | |
67 return HotSpotObjectConstantImpl.forObject(value); | |
68 } else { | |
69 return JavaConstant.forBoxedPrimitive(value); | |
70 } | |
71 } | |
72 | |
73 static Object asBoxedValue(Constant constant) { | |
74 if (JavaConstant.isNull(constant)) { | |
75 return null; | |
76 } else if (constant instanceof HotSpotObjectConstantImpl) { | |
77 return ((HotSpotObjectConstantImpl) constant).object; | |
78 } else { | |
79 return ((JavaConstant) constant).asBoxedPrimitive(); | |
80 } | |
81 } | |
82 | |
83 private final Object object; | |
84 private final boolean compressed; | |
85 private final byte stableDimension; | |
86 private final boolean isDefaultStable; | |
87 | |
88 private HotSpotObjectConstantImpl(Object object, boolean compressed, int stableDimension, boolean isDefaultStable) { | |
89 this.object = object; | |
90 this.compressed = compressed; | |
91 this.stableDimension = (byte) stableDimension; | |
92 this.isDefaultStable = isDefaultStable; | |
93 assert object != null; | |
94 assert stableDimension == 0 || (object != null && object.getClass().isArray()); | |
95 assert stableDimension >= 0 && stableDimension <= 255; | |
96 assert !isDefaultStable || stableDimension > 0; | |
97 } | |
98 | |
99 private HotSpotObjectConstantImpl(Object object, boolean compressed) { | |
100 this(object, compressed, 0, false); | |
101 } | |
102 | |
103 @Override | |
104 public JavaKind getJavaKind() { | |
105 return JavaKind.Object; | |
106 } | |
107 | |
108 /** | |
109 * Package-private accessor for the object represented by this constant. | |
110 */ | |
111 Object object() { | |
112 return object; | |
113 } | |
114 | |
115 public boolean isCompressed() { | |
116 return compressed; | |
117 } | |
118 | |
119 public JavaConstant compress() { | |
120 assert !compressed; | |
121 return new HotSpotObjectConstantImpl(object, true, stableDimension, isDefaultStable); | |
122 } | |
123 | |
124 public JavaConstant uncompress() { | |
125 assert compressed; | |
126 return new HotSpotObjectConstantImpl(object, false, stableDimension, isDefaultStable); | |
127 } | |
128 | |
129 public HotSpotResolvedObjectType getType() { | |
130 return fromObjectClass(object.getClass()); | |
131 } | |
132 | |
133 public JavaConstant getClassLoader() { | |
134 if (object instanceof Class) { | |
135 /* | |
136 * This is an intrinsic for getClassLoader0, which occurs after any security checks. We | |
137 * can't call that directly so just call getClassLoader. | |
138 */ | |
139 return HotSpotObjectConstantImpl.forObject(((Class<?>) object).getClassLoader()); | |
140 } | |
141 return null; | |
142 } | |
143 | |
144 public int getIdentityHashCode() { | |
145 return System.identityHashCode(object); | |
146 } | |
147 | |
148 public JavaConstant getComponentType() { | |
149 if (object instanceof Class) { | |
150 return HotSpotObjectConstantImpl.forObject(((Class<?>) object).getComponentType()); | |
151 } | |
152 return null; | |
153 } | |
154 | |
155 public JavaConstant getSuperclass() { | |
156 if (object instanceof Class) { | |
157 return HotSpotObjectConstantImpl.forObject(((Class<?>) object).getSuperclass()); | |
158 } | |
159 return null; | |
160 } | |
161 | |
162 public JavaConstant getCallSiteTarget(Assumptions assumptions) { | |
163 if (object instanceof CallSite) { | |
164 CallSite callSite = (CallSite) object; | |
165 MethodHandle target = callSite.getTarget(); | |
166 if (!(callSite instanceof ConstantCallSite)) { | |
167 if (assumptions == null) { | |
168 return null; | |
169 } | |
170 assumptions.record(new Assumptions.CallSiteTargetValue(callSite, target)); | |
171 } | |
172 return HotSpotObjectConstantImpl.forObject(target); | |
173 } | |
174 return null; | |
175 } | |
176 | |
177 @SuppressFBWarnings(value = "ES_COMPARING_STRINGS_WITH_EQ", justification = "reference equality is what we want") | |
178 public boolean isInternedString() { | |
179 if (object instanceof String) { | |
180 String s = (String) object; | |
181 return s.intern() == s; | |
182 } | |
183 return false; | |
184 } | |
185 | |
186 public <T> T asObject(Class<T> type) { | |
187 if (type.isInstance(object)) { | |
188 return type.cast(object); | |
189 } | |
190 return null; | |
191 } | |
192 | |
193 public Object asObject(ResolvedJavaType type) { | |
194 if (type.isInstance(this)) { | |
195 return object; | |
196 } | |
197 return null; | |
198 } | |
199 | |
200 @Override | |
201 public boolean isNull() { | |
202 return false; | |
203 } | |
204 | |
205 @Override | |
206 public boolean isDefaultForKind() { | |
207 return false; | |
208 } | |
209 | |
210 @Override | |
211 public Object asBoxedPrimitive() { | |
212 throw new IllegalArgumentException(); | |
213 } | |
214 | |
215 @Override | |
216 public int asInt() { | |
217 throw new IllegalArgumentException(); | |
218 } | |
219 | |
220 @Override | |
221 public boolean asBoolean() { | |
222 throw new IllegalArgumentException(); | |
223 } | |
224 | |
225 @Override | |
226 public long asLong() { | |
227 throw new IllegalArgumentException(); | |
228 } | |
229 | |
230 @Override | |
231 public float asFloat() { | |
232 throw new IllegalArgumentException(); | |
233 } | |
234 | |
235 @Override | |
236 public double asDouble() { | |
237 throw new IllegalArgumentException(); | |
238 } | |
239 | |
240 @Override | |
241 public int hashCode() { | |
242 return System.identityHashCode(object); | |
243 } | |
244 | |
245 @Override | |
246 public boolean equals(Object o) { | |
247 if (o == this) { | |
248 return true; | |
249 } else if (o instanceof HotSpotObjectConstantImpl) { | |
250 HotSpotObjectConstantImpl other = (HotSpotObjectConstantImpl) o; | |
251 return object == other.object && compressed == other.compressed && stableDimension == other.stableDimension && isDefaultStable == other.isDefaultStable; | |
252 } | |
253 return false; | |
254 } | |
255 | |
256 @Override | |
257 public String toValueString() { | |
258 if (object instanceof String) { | |
259 return "\"" + (String) object + "\""; | |
260 } else { | |
261 return JavaKind.Object.format(object); | |
262 } | |
263 } | |
264 | |
265 @Override | |
266 public String toString() { | |
267 return (compressed ? "NarrowOop" : getJavaKind().getJavaName()) + "[" + JavaKind.Object.format(object) + "]"; | |
268 } | |
269 | |
270 /** | |
271 * Number of stable dimensions if this constant is a stable array. | |
272 */ | |
273 public int getStableDimension() { | |
274 return stableDimension & 0xff; | |
275 } | |
276 | |
277 /** | |
278 * Returns {@code true} if this is a stable array constant and its elements should be considered | |
279 * as stable regardless of whether they are default values. | |
280 */ | |
281 public boolean isDefaultStable() { | |
282 return isDefaultStable; | |
283 } | |
284 } |