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.*;
26
27 import java.lang.invoke.*;
28
29 import jdk.vm.ci.inittimer.*;
30 import jdk.vm.ci.meta.*;
31
32 /**
33 * Represents a constant non-{@code null} object reference, within the compiler and across the
34 * compiler/runtime interface.
35 */
36 public final class HotSpotObjectConstantImpl implements HotSpotObjectConstant, HotSpotProxified {
37
38 public static JavaConstant forObject(Object object) {
39 return forObject(object, false);
40 }
41
42 static JavaConstant forObject(Object object, boolean compressed) {
43 if (object == null) {
44 return compressed ? HotSpotCompressedNullConstant.COMPRESSED_NULL : JavaConstant.NULL_POINTER;
45 } else {
46 return new HotSpotObjectConstantImpl(object, compressed);
47 }
48 }
49
50 static JavaConstant forStableArray(Object object, int stableDimension, boolean isDefaultStable) {
51 if (object == null) {
52 return JavaConstant.NULL_POINTER;
53 } else {
54 assert object.getClass().isArray();
55 return new HotSpotObjectConstantImpl(object, false, stableDimension, isDefaultStable);
56 }
57 }
58
89 assert stableDimension >= 0 && stableDimension <= 255;
90 assert !isDefaultStable || stableDimension > 0;
91 }
92
93 private HotSpotObjectConstantImpl(Object object, boolean compressed) {
94 this(object, compressed, 0, false);
95 }
96
97 @Override
98 public JavaKind getJavaKind() {
99 return JavaKind.Object;
100 }
101
102 /**
103 * Package-private accessor for the object represented by this constant.
104 */
105 Object object() {
106 return object;
107 }
108
109 /**
110 * Determines if the object represented by this constant is {@link Object#equals(Object) equal}
111 * to a given object.
112 */
113 public boolean isEqualTo(Object obj) {
114 return object.equals(obj);
115 }
116
117 /**
118 * Gets the class of the object represented by this constant.
119 */
120 public Class<?> getObjectClass() {
121 return object.getClass();
122 }
123
124 public boolean isCompressed() {
125 return compressed;
126 }
127
128 public JavaConstant compress() {
129 assert !compressed;
130 return new HotSpotObjectConstantImpl(object, true, stableDimension, isDefaultStable);
131 }
132
133 public JavaConstant uncompress() {
134 assert compressed;
135 return new HotSpotObjectConstantImpl(object, false, stableDimension, isDefaultStable);
136 }
137
138 public HotSpotResolvedObjectType getType() {
139 return fromObjectClass(object.getClass());
140 }
141
142 public JavaConstant getClassLoader() {
143 if (object instanceof Class) {
|
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
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) {
|