Mercurial > hg > graal-compiler
annotate src/share/vm/oops/fieldInfo.hpp @ 7199:cd3d6a6b95d9
8003240: x86: move MacroAssembler into separate file
Reviewed-by: kvn
author | twisti |
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date | Fri, 30 Nov 2012 15:23:16 -0800 |
parents | da91efe96a93 |
children | 4a916f2ce331 |
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3938 | 1 /* |
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2 * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved. |
3938 | 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 #ifndef SHARE_VM_OOPS_FIELDINFO_HPP | |
26 #define SHARE_VM_OOPS_FIELDINFO_HPP | |
27 | |
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28 #include "oops/constantPool.hpp" |
3938 | 29 #include "oops/typeArrayOop.hpp" |
30 #include "classfile/vmSymbols.hpp" | |
31 | |
32 // This class represents the field information contained in the fields | |
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33 // array of an InstanceKlass. Currently it's laid on top an array of |
3938 | 34 // Java shorts but in the future it could simply be used as a real |
35 // array type. FieldInfo generally shouldn't be used directly. | |
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36 // Fields should be queried either through InstanceKlass or through |
3938 | 37 // the various FieldStreams. |
38 class FieldInfo VALUE_OBJ_CLASS_SPEC { | |
39 friend class fieldDescriptor; | |
40 friend class JavaFieldStream; | |
41 friend class ClassFileParser; | |
42 | |
43 public: | |
44 // fields | |
45 // Field info extracted from the class file and stored | |
46 // as an array of 7 shorts | |
47 enum FieldOffset { | |
48 access_flags_offset = 0, | |
49 name_index_offset = 1, | |
50 signature_index_offset = 2, | |
51 initval_index_offset = 3, | |
52 low_offset = 4, | |
53 high_offset = 5, | |
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54 field_slots = 6 |
3938 | 55 }; |
56 | |
57 private: | |
58 u2 _shorts[field_slots]; | |
59 | |
60 void set_name_index(u2 val) { _shorts[name_index_offset] = val; } | |
61 void set_signature_index(u2 val) { _shorts[signature_index_offset] = val; } | |
62 void set_initval_index(u2 val) { _shorts[initval_index_offset] = val; } | |
63 | |
64 u2 name_index() const { return _shorts[name_index_offset]; } | |
65 u2 signature_index() const { return _shorts[signature_index_offset]; } | |
66 u2 initval_index() const { return _shorts[initval_index_offset]; } | |
67 | |
68 public: | |
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69 static FieldInfo* from_field_array(Array<u2>* fields, int index) { |
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70 return ((FieldInfo*)fields->adr_at(index * field_slots)); |
3938 | 71 } |
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72 static FieldInfo* from_field_array(u2* fields, int index) { |
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73 return ((FieldInfo*)(fields + index * field_slots)); |
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74 } |
3938 | 75 |
76 void initialize(u2 access_flags, | |
77 u2 name_index, | |
78 u2 signature_index, | |
79 u2 initval_index, | |
80 u4 offset) { | |
81 _shorts[access_flags_offset] = access_flags; | |
82 _shorts[name_index_offset] = name_index; | |
83 _shorts[signature_index_offset] = signature_index; | |
84 _shorts[initval_index_offset] = initval_index; | |
85 set_offset(offset); | |
86 } | |
87 | |
88 u2 access_flags() const { return _shorts[access_flags_offset]; } | |
89 u4 offset() const { return build_int_from_shorts(_shorts[low_offset], _shorts[high_offset]); } | |
90 | |
91 Symbol* name(constantPoolHandle cp) const { | |
92 int index = name_index(); | |
93 if (is_internal()) { | |
94 return lookup_symbol(index); | |
95 } | |
96 return cp->symbol_at(index); | |
97 } | |
98 | |
99 Symbol* signature(constantPoolHandle cp) const { | |
100 int index = signature_index(); | |
101 if (is_internal()) { | |
102 return lookup_symbol(index); | |
103 } | |
104 return cp->symbol_at(index); | |
105 } | |
106 | |
107 void set_access_flags(u2 val) { _shorts[access_flags_offset] = val; } | |
108 void set_offset(u4 val) { | |
109 _shorts[low_offset] = extract_low_short_from_int(val); | |
110 _shorts[high_offset] = extract_high_short_from_int(val); | |
111 } | |
112 | |
113 bool is_internal() const { | |
114 return (access_flags() & JVM_ACC_FIELD_INTERNAL) != 0; | |
115 } | |
116 | |
117 Symbol* lookup_symbol(int symbol_index) const { | |
118 assert(is_internal(), "only internal fields"); | |
119 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index); | |
120 } | |
121 }; | |
122 | |
123 #endif // SHARE_VM_OOPS_FIELDINFO_HPP |