Mercurial > hg > graal-compiler
annotate src/share/vm/ci/ciObjArrayKlass.cpp @ 6135:8f37087fc13f
7171890: C1: add Class.isInstance intrinsic
Summary: Class.cast which calls Class.isInstance is heavily used by the new JSR 292 implementation
Reviewed-by: roland
Contributed-by: Krystal Mok <rednaxelafx@gmail.com>
author | roland |
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date | Tue, 05 Jun 2012 10:15:27 +0200 |
parents | ddd894528dbc |
children | da91efe96a93 |
rev | line source |
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0 | 1 /* |
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7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
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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. | |
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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/ciInstanceKlass.hpp" | |
27 #include "ci/ciObjArrayKlass.hpp" | |
28 #include "ci/ciObjArrayKlassKlass.hpp" | |
29 #include "ci/ciSymbol.hpp" | |
30 #include "ci/ciUtilities.hpp" | |
31 #include "oops/objArrayKlass.hpp" | |
0 | 32 |
33 // ciObjArrayKlass | |
34 // | |
35 // This class represents a klassOop in the HotSpot virtual machine | |
36 // whose Klass part is an objArrayKlass. | |
37 | |
38 // ------------------------------------------------------------------ | |
39 // ciObjArrayKlass::ciObjArrayKlass | |
40 // | |
41 // Constructor for loaded object array klasses. | |
42 ciObjArrayKlass::ciObjArrayKlass(KlassHandle h_k) : ciArrayKlass(h_k) { | |
43 assert(get_Klass()->oop_is_objArray(), "wrong type"); | |
44 klassOop element_klassOop = get_objArrayKlass()->bottom_klass(); | |
45 _base_element_klass = CURRENT_ENV->get_object(element_klassOop)->as_klass(); | |
46 assert(_base_element_klass->is_instance_klass() || | |
47 _base_element_klass->is_type_array_klass(), "bad base klass"); | |
48 if (dimension() == 1) { | |
49 _element_klass = _base_element_klass; | |
50 } else { | |
51 _element_klass = NULL; | |
52 } | |
53 if (!ciObjectFactory::is_initialized()) { | |
54 assert(_element_klass->is_java_lang_Object(), "only arrays of object are shared"); | |
55 } | |
56 } | |
57 | |
58 // ------------------------------------------------------------------ | |
59 // ciObjArrayKlass::ciObjArrayKlass | |
60 // | |
61 // Constructor for unloaded object array klasses. | |
62 ciObjArrayKlass::ciObjArrayKlass(ciSymbol* array_name, | |
63 ciKlass* base_element_klass, | |
64 int dimension) | |
65 : ciArrayKlass(array_name, | |
66 dimension, | |
67 ciObjArrayKlassKlass::make()) { | |
68 _base_element_klass = base_element_klass; | |
69 assert(_base_element_klass->is_instance_klass() || | |
70 _base_element_klass->is_type_array_klass(), "bad base klass"); | |
71 if (dimension == 1) { | |
72 _element_klass = base_element_klass; | |
73 } else { | |
74 _element_klass = NULL; | |
75 } | |
76 } | |
77 | |
78 // ------------------------------------------------------------------ | |
79 // ciObjArrayKlass::element_klass | |
80 // | |
81 // What is the one-level element type of this array? | |
82 ciKlass* ciObjArrayKlass::element_klass() { | |
83 if (_element_klass == NULL) { | |
84 assert(dimension() > 1, "_element_klass should not be NULL"); | |
85 // Produce the element klass. | |
86 if (is_loaded()) { | |
87 VM_ENTRY_MARK; | |
88 klassOop element_klassOop = get_objArrayKlass()->element_klass(); | |
89 _element_klass = CURRENT_THREAD_ENV->get_object(element_klassOop)->as_klass(); | |
90 } else { | |
91 VM_ENTRY_MARK; | |
92 // We are an unloaded array klass. Attempt to fetch our | |
93 // element klass by name. | |
94 _element_klass = CURRENT_THREAD_ENV->get_klass_by_name_impl( | |
95 this, | |
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96 constantPoolHandle(), |
0 | 97 construct_array_name(base_element_klass()->name(), |
98 dimension() - 1), | |
99 false); | |
100 } | |
101 } | |
102 return _element_klass; | |
103 } | |
104 | |
105 // ------------------------------------------------------------------ | |
106 // ciObjArrayKlass::construct_array_name | |
107 // | |
108 // Build an array name from an element name and a dimension. | |
109 ciSymbol* ciObjArrayKlass::construct_array_name(ciSymbol* element_name, | |
110 int dimension) { | |
111 EXCEPTION_CONTEXT; | |
112 int element_len = element_name->utf8_length(); | |
113 | |
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114 Symbol* base_name_sym = element_name->get_symbol(); |
0 | 115 char* name; |
116 | |
117 if (base_name_sym->byte_at(0) == '[' || | |
118 (base_name_sym->byte_at(0) == 'L' && // watch package name 'Lxx' | |
119 base_name_sym->byte_at(element_len-1) == ';')) { | |
120 | |
121 int new_len = element_len + dimension + 1; // for the ['s and '\0' | |
122 name = CURRENT_THREAD_ENV->name_buffer(new_len); | |
123 | |
124 int pos = 0; | |
125 for ( ; pos < dimension; pos++) { | |
126 name[pos] = '['; | |
127 } | |
128 strncpy(name+pos, (char*)element_name->base(), element_len); | |
129 name[new_len-1] = '\0'; | |
130 } else { | |
131 int new_len = 3 // for L, ;, and '\0' | |
132 + dimension // for ['s | |
133 + element_len; | |
134 | |
135 name = CURRENT_THREAD_ENV->name_buffer(new_len); | |
136 int pos = 0; | |
137 for ( ; pos < dimension; pos++) { | |
138 name[pos] = '['; | |
139 } | |
140 name[pos++] = 'L'; | |
141 strncpy(name+pos, (char*)element_name->base(), element_len); | |
142 name[new_len-2] = ';'; | |
143 name[new_len-1] = '\0'; | |
144 } | |
145 return ciSymbol::make(name); | |
146 } | |
147 | |
148 // ------------------------------------------------------------------ | |
149 // ciObjArrayKlass::make_impl | |
150 // | |
151 // Implementation of make. | |
152 ciObjArrayKlass* ciObjArrayKlass::make_impl(ciKlass* element_klass) { | |
153 | |
154 if (element_klass->is_loaded()) { | |
155 EXCEPTION_CONTEXT; | |
156 // The element klass is loaded | |
157 klassOop array = element_klass->get_Klass()->array_klass(THREAD); | |
158 if (HAS_PENDING_EXCEPTION) { | |
159 CLEAR_PENDING_EXCEPTION; | |
160 CURRENT_THREAD_ENV->record_out_of_memory_failure(); | |
161 return ciEnv::unloaded_ciobjarrayklass(); | |
162 } | |
163 return CURRENT_THREAD_ENV->get_object(array)->as_obj_array_klass(); | |
164 } | |
165 | |
166 // The array klass was unable to be made or the element klass was | |
167 // not loaded. | |
168 ciSymbol* array_name = construct_array_name(element_klass->name(), 1); | |
169 if (array_name == ciEnv::unloaded_cisymbol()) { | |
170 return ciEnv::unloaded_ciobjarrayklass(); | |
171 } | |
172 return | |
173 CURRENT_ENV->get_unloaded_klass(element_klass, array_name) | |
174 ->as_obj_array_klass(); | |
175 } | |
176 | |
177 // ------------------------------------------------------------------ | |
178 // ciObjArrayKlass::make | |
179 // | |
180 // Make an array klass corresponding to the specified primitive type. | |
181 ciObjArrayKlass* ciObjArrayKlass::make(ciKlass* element_klass) { | |
182 assert(element_klass->is_java_klass(), "wrong kind of klass"); | |
183 GUARDED_VM_ENTRY(return make_impl(element_klass);) | |
184 } |