Wed, 27 Apr 2016 01:25:04 +0800
Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17
1 /*
2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
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 */
25 #ifndef SHARE_VM_CI_CIKLASS_HPP
26 #define SHARE_VM_CI_CIKLASS_HPP
28 #include "ci/ciType.hpp"
30 // ciKlass
31 //
32 // This class and its subclasses represent Klass*s in the
33 // HotSpot virtual machine. In the vm, each Klass* contains an
34 // embedded Klass object. ciKlass is subclassed to explicitly
35 // represent the kind of Klass embedded in the Klass*. For
36 // example, a Klass* with an embedded ObjArrayKlass object is
37 // represented in the ciObject hierarchy by the class
38 // ciObjArrayKlass.
39 class ciKlass : public ciType {
40 CI_PACKAGE_ACCESS
41 friend class ciEnv;
42 friend class ciField;
43 friend class ciMethod;
44 friend class ciMethodData;
45 friend class ciObjArrayKlass;
47 private:
48 ciSymbol* _name;
49 jint _layout_helper;
51 protected:
52 ciKlass(KlassHandle k_h, ciSymbol* name);
53 ciKlass(ciSymbol* name, BasicType bt);
55 Klass* get_Klass() const {
56 Klass* k = (Klass*)_metadata;
57 assert(k != NULL, "illegal use of unloaded klass");
58 return k;
59 }
61 // Certain subklasses have an associated class loader.
62 virtual oop loader() { return NULL; }
63 virtual jobject loader_handle() { return NULL; }
65 virtual oop protection_domain() { return NULL; }
66 virtual jobject protection_domain_handle() { return NULL; }
68 const char* type_string() { return "ciKlass"; }
70 void print_impl(outputStream* st);
72 public:
73 ciKlass(KlassHandle k_h);
75 // What is the name of this klass?
76 ciSymbol* name() const { return _name; }
78 // What is its layout helper value?
79 jint layout_helper() { return _layout_helper; }
81 bool is_subtype_of(ciKlass* klass);
82 bool is_subclass_of(ciKlass* klass);
83 juint super_depth();
84 juint super_check_offset();
85 ciKlass* super_of_depth(juint i);
86 bool can_be_primary_super();
87 static juint primary_super_limit() { return Klass::primary_super_limit(); }
89 // Is this ciObject the ciInstanceKlass representing java.lang.Object()?
90 virtual bool is_java_lang_Object() const { return false; }
92 // Get the shared parent of two klasses.
93 ciKlass* least_common_ancestor(ciKlass* k);
95 virtual bool is_interface() {
96 return false;
97 }
99 virtual bool is_abstract() {
100 return false;
101 }
103 // Does this type (array, class, interface) have no subtypes?
104 virtual bool is_leaf_type() {
105 return false;
106 }
108 // Attempt to get a klass using this ciKlass's loader.
109 ciKlass* find_klass(ciSymbol* klass_name);
110 // Note: To find a class from its name string, use ciSymbol::make,
111 // but consider adding to vmSymbols.hpp instead.
113 // Get the instance of java.lang.Class corresponding to this klass.
114 ciInstance* java_mirror();
116 // Fetch Klass::modifier_flags.
117 jint modifier_flags();
119 // Fetch Klass::access_flags.
120 jint access_flags();
122 // What kind of ciObject is this?
123 bool is_klass() const { return true; }
125 virtual ciKlass* exact_klass() = 0;
127 void print_name_on(outputStream* st);
128 };
130 #endif // SHARE_VM_CI_CIKLASS_HPP