Mercurial > hg > truffle
annotate src/share/vm/ci/ciKlass.cpp @ 2645:b2c1e959be46
Clean up around BlockBegin / StdEntry.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 11 May 2011 14:34:29 +0200 |
parents | 1d1603768966 |
children | 5e331d5f760e 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/ciKlass.hpp" | |
27 #include "ci/ciSymbol.hpp" | |
28 #include "ci/ciUtilities.hpp" | |
29 #include "oops/oop.inline.hpp" | |
0 | 30 |
31 // ciKlass | |
32 // | |
33 // This class represents a klassOop in the HotSpot virtual | |
34 // machine. | |
35 | |
36 // ------------------------------------------------------------------ | |
37 // ciKlass::ciKlass | |
38 ciKlass::ciKlass(KlassHandle h_k) : ciType(h_k) { | |
39 assert(get_oop()->is_klass(), "wrong type"); | |
40 Klass* k = get_Klass(); | |
41 _layout_helper = k->layout_helper(); | |
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42 Symbol* klass_name = k->name(); |
0 | 43 assert(klass_name != NULL, "wrong ciKlass constructor"); |
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44 _name = CURRENT_ENV->get_symbol(klass_name); |
0 | 45 } |
46 | |
47 // ------------------------------------------------------------------ | |
48 // ciKlass::ciKlass | |
49 // | |
50 // Nameless klass variant. | |
51 ciKlass::ciKlass(KlassHandle h_k, ciSymbol* name) : ciType(h_k) { | |
52 assert(get_oop()->is_klass(), "wrong type"); | |
53 _name = name; | |
54 _layout_helper = Klass::_lh_neutral_value; | |
55 } | |
56 | |
57 // ------------------------------------------------------------------ | |
58 // ciKlass::ciKlass | |
59 // | |
60 // Unloaded klass variant. | |
61 ciKlass::ciKlass(ciSymbol* name, ciKlass* klass) : ciType(klass) { | |
62 _name = name; | |
63 _layout_helper = Klass::_lh_neutral_value; | |
64 } | |
65 | |
66 // ------------------------------------------------------------------ | |
67 // ciKlass::is_subtype_of | |
68 bool ciKlass::is_subtype_of(ciKlass* that) { | |
69 assert(is_loaded() && that->is_loaded(), "must be loaded"); | |
70 assert(is_java_klass() && that->is_java_klass(), "must be java klasses"); | |
71 // Check to see if the klasses are identical. | |
72 if (this == that) { | |
73 return true; | |
74 } | |
75 | |
76 VM_ENTRY_MARK; | |
77 Klass* this_klass = get_Klass(); | |
78 klassOop that_klass = that->get_klassOop(); | |
79 bool result = this_klass->is_subtype_of(that_klass); | |
80 | |
81 return result; | |
82 } | |
83 | |
84 // ------------------------------------------------------------------ | |
85 // ciKlass::is_subclass_of | |
86 bool ciKlass::is_subclass_of(ciKlass* that) { | |
87 assert(is_loaded() && that->is_loaded(), "must be loaded"); | |
88 assert(is_java_klass() && that->is_java_klass(), "must be java klasses"); | |
89 // Check to see if the klasses are identical. | |
90 | |
91 VM_ENTRY_MARK; | |
92 Klass* this_klass = get_Klass(); | |
93 klassOop that_klass = that->get_klassOop(); | |
94 bool result = this_klass->is_subclass_of(that_klass); | |
95 | |
96 return result; | |
97 } | |
98 | |
99 // ------------------------------------------------------------------ | |
100 // ciKlass::super_depth | |
101 juint ciKlass::super_depth() { | |
102 assert(is_loaded(), "must be loaded"); | |
103 assert(is_java_klass(), "must be java klasses"); | |
104 | |
105 VM_ENTRY_MARK; | |
106 Klass* this_klass = get_Klass(); | |
107 return this_klass->super_depth(); | |
108 } | |
109 | |
110 // ------------------------------------------------------------------ | |
111 // ciKlass::super_check_offset | |
112 juint ciKlass::super_check_offset() { | |
113 assert(is_loaded(), "must be loaded"); | |
114 assert(is_java_klass(), "must be java klasses"); | |
115 | |
116 VM_ENTRY_MARK; | |
117 Klass* this_klass = get_Klass(); | |
118 return this_klass->super_check_offset(); | |
119 } | |
120 | |
121 // ------------------------------------------------------------------ | |
122 // ciKlass::super_of_depth | |
123 ciKlass* ciKlass::super_of_depth(juint i) { | |
124 assert(is_loaded(), "must be loaded"); | |
125 assert(is_java_klass(), "must be java klasses"); | |
126 | |
127 VM_ENTRY_MARK; | |
128 Klass* this_klass = get_Klass(); | |
129 klassOop super = this_klass->primary_super_of_depth(i); | |
130 return (super != NULL) ? CURRENT_THREAD_ENV->get_object(super)->as_klass() : NULL; | |
131 } | |
132 | |
133 // ------------------------------------------------------------------ | |
134 // ciKlass::can_be_primary_super | |
135 bool ciKlass::can_be_primary_super() { | |
136 assert(is_loaded(), "must be loaded"); | |
137 assert(is_java_klass(), "must be java klasses"); | |
138 | |
139 VM_ENTRY_MARK; | |
140 Klass* this_klass = get_Klass(); | |
141 return this_klass->can_be_primary_super(); | |
142 } | |
143 | |
144 // ------------------------------------------------------------------ | |
145 // ciKlass::least_common_ancestor | |
146 // | |
147 // Get the shared parent of two klasses. | |
148 // | |
149 // Implementation note: this method currently goes "over the wall" | |
150 // and does all of the work on the VM side. It could be rewritten | |
151 // to use the super() method and do all of the work (aside from the | |
152 // lazy computation of super()) in native mode. This may be | |
153 // worthwhile if the compiler is repeatedly requesting the same lca | |
154 // computation or possibly if most of the superklasses have already | |
155 // been created as ciObjects anyway. Something to think about... | |
156 ciKlass* | |
157 ciKlass::least_common_ancestor(ciKlass* that) { | |
158 assert(is_loaded() && that->is_loaded(), "must be loaded"); | |
159 assert(is_java_klass() && that->is_java_klass(), "must be java klasses"); | |
160 // Check to see if the klasses are identical. | |
161 if (this == that) { | |
162 return this; | |
163 } | |
164 | |
165 VM_ENTRY_MARK; | |
166 Klass* this_klass = get_Klass(); | |
167 Klass* that_klass = that->get_Klass(); | |
168 Klass* lca = this_klass->LCA(that_klass); | |
169 | |
170 // Many times the LCA will be either this_klass or that_klass. | |
171 // Treat these as special cases. | |
172 if (lca == that_klass) { | |
173 return that; | |
174 } | |
175 if (this_klass == lca) { | |
176 return this; | |
177 } | |
178 | |
179 // Create the ciInstanceKlass for the lca. | |
180 ciKlass* result = | |
181 CURRENT_THREAD_ENV->get_object(lca->as_klassOop())->as_klass(); | |
182 | |
183 return result; | |
184 } | |
185 | |
186 // ------------------------------------------------------------------ | |
187 // ciKlass::find_klass | |
188 // | |
189 // Find a klass using this klass's class loader. | |
190 ciKlass* ciKlass::find_klass(ciSymbol* klass_name) { | |
191 assert(is_loaded(), "cannot find_klass through an unloaded klass"); | |
192 return CURRENT_ENV->get_klass_by_name(this, | |
193 klass_name, false); | |
194 } | |
195 | |
196 // ------------------------------------------------------------------ | |
197 // ciKlass::java_mirror | |
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198 // |
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199 // Get the instance of java.lang.Class corresponding to this klass. |
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200 // If it is an unloaded instance or array klass, return an unloaded |
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201 // mirror object of type Class. |
0 | 202 ciInstance* ciKlass::java_mirror() { |
203 GUARDED_VM_ENTRY( | |
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204 if (!is_loaded()) |
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205 return ciEnv::current()->get_unloaded_klass_mirror(this); |
0 | 206 oop java_mirror = get_Klass()->java_mirror(); |
207 return CURRENT_ENV->get_object(java_mirror)->as_instance(); | |
208 ) | |
209 } | |
210 | |
211 // ------------------------------------------------------------------ | |
212 // ciKlass::modifier_flags | |
213 jint ciKlass::modifier_flags() { | |
214 assert(is_loaded(), "not loaded"); | |
215 GUARDED_VM_ENTRY( | |
216 return get_Klass()->modifier_flags(); | |
217 ) | |
218 } | |
219 | |
220 // ------------------------------------------------------------------ | |
221 // ciKlass::access_flags | |
222 jint ciKlass::access_flags() { | |
223 assert(is_loaded(), "not loaded"); | |
224 GUARDED_VM_ENTRY( | |
225 return get_Klass()->access_flags().as_int(); | |
226 ) | |
227 } | |
228 | |
229 // ------------------------------------------------------------------ | |
230 // ciKlass::print_impl | |
231 // | |
232 // Implementation of the print method | |
233 void ciKlass::print_impl(outputStream* st) { | |
234 st->print(" name="); | |
235 print_name_on(st); | |
236 } | |
237 | |
238 // ------------------------------------------------------------------ | |
239 // ciKlass::print_name | |
240 // | |
241 // Print the name of this klass | |
242 void ciKlass::print_name_on(outputStream* st) { | |
243 name()->print_symbol_on(st); | |
244 } |