Mercurial > hg > truffle
annotate src/share/vm/ci/ciInstance.cpp @ 5073:2db1ad9dd385
rename PiNode.value to PiNode.object and UnsafeCastNode.x to UnsafeCastNode.object
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Wed, 14 Mar 2012 16:57:18 +0100 |
parents | 3fa3c7e4d4f3 |
children | da91efe96a93 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "ci/ciConstant.hpp" | |
27 #include "ci/ciField.hpp" | |
28 #include "ci/ciInstance.hpp" | |
29 #include "ci/ciInstanceKlass.hpp" | |
30 #include "ci/ciUtilities.hpp" | |
31 #include "classfile/systemDictionary.hpp" | |
32 #include "oops/oop.inline.hpp" | |
0 | 33 |
34 // ciInstance | |
35 // | |
36 // This class represents an instanceOop in the HotSpot virtual | |
37 // machine. | |
38 | |
39 // ------------------------------------------------------------------ | |
40 // ciObject::java_mirror_type | |
41 ciType* ciInstance::java_mirror_type() { | |
42 VM_ENTRY_MARK; | |
43 oop m = get_oop(); | |
44 // Return NULL if it is not java.lang.Class. | |
1142 | 45 if (m == NULL || m->klass() != SystemDictionary::Class_klass()) { |
0 | 46 return NULL; |
47 } | |
48 // Return either a primitive type or a klass. | |
49 if (java_lang_Class::is_primitive(m)) { | |
50 return ciType::make(java_lang_Class::primitive_type(m)); | |
51 } else { | |
52 klassOop k = java_lang_Class::as_klassOop(m); | |
53 assert(k != NULL, ""); | |
54 return CURRENT_THREAD_ENV->get_object(k)->as_klass(); | |
55 } | |
56 } | |
57 | |
58 // ------------------------------------------------------------------ | |
59 // ciInstance::field_value | |
60 // | |
61 // Constant value of a field. | |
62 ciConstant ciInstance::field_value(ciField* field) { | |
63 assert(is_loaded() && | |
64 field->holder()->is_loaded() && | |
65 klass()->is_subclass_of(field->holder()), | |
66 "invalid access"); | |
67 VM_ENTRY_MARK; | |
68 ciConstant result; | |
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69 Handle obj = get_oop(); |
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70 assert(!obj.is_null(), "bad oop"); |
0 | 71 BasicType field_btype = field->type()->basic_type(); |
72 int offset = field->offset(); | |
73 | |
74 switch(field_btype) { | |
75 case T_BYTE: | |
76 return ciConstant(field_btype, obj->byte_field(offset)); | |
77 break; | |
78 case T_CHAR: | |
79 return ciConstant(field_btype, obj->char_field(offset)); | |
80 break; | |
81 case T_SHORT: | |
82 return ciConstant(field_btype, obj->short_field(offset)); | |
83 break; | |
84 case T_BOOLEAN: | |
85 return ciConstant(field_btype, obj->bool_field(offset)); | |
86 break; | |
87 case T_INT: | |
88 return ciConstant(field_btype, obj->int_field(offset)); | |
89 break; | |
90 case T_FLOAT: | |
91 return ciConstant(obj->float_field(offset)); | |
92 break; | |
93 case T_DOUBLE: | |
94 return ciConstant(obj->double_field(offset)); | |
95 break; | |
96 case T_LONG: | |
97 return ciConstant(obj->long_field(offset)); | |
98 break; | |
99 case T_OBJECT: | |
100 case T_ARRAY: | |
101 { | |
102 oop o = obj->obj_field(offset); | |
103 | |
104 // A field will be "constant" if it is known always to be | |
105 // a non-null reference to an instance of a particular class, | |
106 // or to a particular array. This can happen even if the instance | |
107 // or array is not perm. In such a case, an "unloaded" ciArray | |
108 // or ciInstance is created. The compiler may be able to use | |
109 // information about the object's class (which is exact) or length. | |
110 | |
111 if (o == NULL) { | |
112 return ciConstant(field_btype, ciNullObject::make()); | |
113 } else { | |
114 return ciConstant(field_btype, CURRENT_ENV->get_object(o)); | |
115 } | |
116 } | |
117 } | |
118 ShouldNotReachHere(); | |
119 // to shut up the compiler | |
120 return ciConstant(); | |
121 } | |
122 | |
123 // ------------------------------------------------------------------ | |
124 // ciInstance::field_value_by_offset | |
125 // | |
126 // Constant value of a field at the specified offset. | |
127 ciConstant ciInstance::field_value_by_offset(int field_offset) { | |
128 ciInstanceKlass* ik = klass()->as_instance_klass(); | |
129 ciField* field = ik->get_field_by_offset(field_offset, false); | |
130 return field_value(field); | |
131 } | |
132 | |
133 // ------------------------------------------------------------------ | |
134 // ciInstance::print_impl | |
135 // | |
136 // Implementation of the print method. | |
137 void ciInstance::print_impl(outputStream* st) { | |
138 st->print(" type="); | |
139 klass()->print(st); | |
140 } | |
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141 |
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142 |
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143 ciKlass* ciInstance::java_lang_Class_klass() { |
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144 VM_ENTRY_MARK; |
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145 return CURRENT_ENV->get_object(java_lang_Class::as_klassOop(get_oop()))->as_klass(); |
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146 } |