Mercurial > hg > graal-compiler
annotate src/share/vm/ci/ciKlass.hpp @ 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 | f95d63e2154a |
children | da91efe96a93 |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1999, 2010, 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 #ifndef SHARE_VM_CI_CIKLASS_HPP |
26 #define SHARE_VM_CI_CIKLASS_HPP | |
27 | |
28 #include "ci/ciType.hpp" | |
29 #include "oops/klassOop.hpp" | |
30 | |
0 | 31 // ciKlass |
32 // | |
33 // This class and its subclasses represent klassOops in the | |
34 // HotSpot virtual machine. In the vm, each klassOop contains an | |
35 // embedded Klass object. ciKlass is subclassed to explicitly | |
36 // represent the kind of Klass embedded in the klassOop. For | |
37 // example, a klassOop with an embedded objArrayKlass object is | |
38 // represented in the ciObject hierarchy by the class | |
39 // ciObjArrayKlass. | |
40 class ciKlass : public ciType { | |
41 CI_PACKAGE_ACCESS | |
42 friend class ciEnv; | |
43 friend class ciField; | |
44 friend class ciMethod; | |
45 friend class ciObjArrayKlass; | |
46 | |
47 private: | |
48 ciSymbol* _name; | |
49 jint _layout_helper; | |
50 | |
51 protected: | |
52 ciKlass(KlassHandle k_h, ciSymbol* name); | |
53 ciKlass(ciSymbol* name, ciKlass* klass); | |
54 | |
55 klassOop get_klassOop() const { | |
56 klassOop k = (klassOop)get_oop(); | |
57 assert(k != NULL, "illegal use of unloaded klass"); | |
58 return k; | |
59 } | |
60 | |
61 Klass* get_Klass() const { return get_klassOop()->klass_part(); } | |
62 | |
63 // Certain subklasses have an associated class loader. | |
64 virtual oop loader() { return NULL; } | |
65 virtual jobject loader_handle() { return NULL; } | |
66 | |
67 virtual oop protection_domain() { return NULL; } | |
68 virtual jobject protection_domain_handle() { return NULL; } | |
69 | |
70 const char* type_string() { return "ciKlass"; } | |
71 | |
72 void print_impl(outputStream* st); | |
73 | |
74 public: | |
75 ciKlass(KlassHandle k_h); | |
76 | |
77 // What is the name of this klass? | |
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78 ciSymbol* name() const { return _name; } |
0 | 79 |
80 // What is its layout helper value? | |
81 jint layout_helper() { return _layout_helper; } | |
82 | |
83 bool is_subtype_of(ciKlass* klass); | |
84 bool is_subclass_of(ciKlass* klass); | |
85 juint super_depth(); | |
86 juint super_check_offset(); | |
87 ciKlass* super_of_depth(juint i); | |
88 bool can_be_primary_super(); | |
89 static juint primary_super_limit() { return Klass::primary_super_limit(); } | |
90 | |
91 // Get the shared parent of two klasses. | |
92 ciKlass* least_common_ancestor(ciKlass* k); | |
93 | |
94 virtual bool is_interface() { | |
95 return false; | |
96 } | |
97 | |
98 virtual bool is_abstract() { | |
99 return false; | |
100 } | |
101 | |
102 // Does this type (array, class, interface) have no subtypes? | |
103 virtual bool is_leaf_type() { | |
104 return false; | |
105 } | |
106 | |
107 // Attempt to get a klass using this ciKlass's loader. | |
108 ciKlass* find_klass(ciSymbol* klass_name); | |
109 // Note: To find a class from its name string, use ciSymbol::make, | |
110 // but consider adding to vmSymbols.hpp instead. | |
111 | |
112 // Get the instance of java.lang.Class corresponding to this klass. | |
113 ciInstance* java_mirror(); | |
114 | |
115 // Fetch Klass::modifier_flags. | |
116 jint modifier_flags(); | |
117 | |
118 // Fetch Klass::access_flags. | |
119 jint access_flags(); | |
120 | |
121 // What kind of ciObject is this? | |
122 bool is_klass() { return true; } | |
123 | |
124 void print_name_on(outputStream* st); | |
125 }; | |
1972 | 126 |
127 #endif // SHARE_VM_CI_CIKLASS_HPP |