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comparison src/share/vm/ci/ciMetadata.hpp @ 6725:da91efe96a93

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6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
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children bd7a7ce2e264
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6724:36d1d483d5d6 6725:da91efe96a93
1 /*
2 * Copyright (c) 1999, 2012, 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 */
24
25 #ifndef SHARE_VM_CI_CIMETADATA_HPP
26 #define SHARE_VM_CI_CIMETADATA_HPP
27
28 #include "ci/ciBaseObject.hpp"
29 #include "ci/ciClassList.hpp"
30 #include "memory/allocation.hpp"
31 #include "runtime/handles.hpp"
32 #include "runtime/jniHandles.hpp"
33
34 // ciMetadata
35 //
36 // Compiler interface to metadata object in the VM, not Java object.
37
38 class ciMetadata: public ciBaseObject {
39 CI_PACKAGE_ACCESS
40 friend class ciEnv;
41
42 protected:
43 Metadata* _metadata;
44
45 ciMetadata(): _metadata(NULL) {}
46 ciMetadata(Metadata* o): _metadata(o) {}
47
48 virtual bool is_classless() const { return false; }
49 public:
50 bool is_loaded() const { return _metadata != NULL || is_classless(); }
51
52 virtual bool is_metadata() const { return true; }
53
54 virtual bool is_type() const { return false; }
55 virtual bool is_cpcache() const { return false; }
56 virtual bool is_return_address() const { return false; }
57 virtual bool is_method() const { return false; }
58 virtual bool is_method_data() const { return false; }
59 virtual bool is_klass() const { return false; }
60 virtual bool is_instance_klass() const { return false; }
61 virtual bool is_array_klass() const { return false; }
62 virtual bool is_obj_array_klass() const { return false; }
63 virtual bool is_type_array_klass() const { return false; }
64
65 ciMethod* as_method() {
66 assert(is_method(), "bad cast");
67 return (ciMethod*)this;
68 }
69 ciMethodData* as_method_data() {
70 assert(is_method_data(), "bad cast");
71 return (ciMethodData*)this;
72 }
73 ciSymbol* as_symbol() {
74 assert(is_symbol(), "bad cast");
75 return (ciSymbol*)this;
76 }
77 ciType* as_type() {
78 assert(is_type(), "bad cast");
79 return (ciType*)this;
80 }
81 ciReturnAddress* as_return_address() {
82 assert(is_return_address(), "bad cast");
83 return (ciReturnAddress*)this;
84 }
85 ciKlass* as_klass() {
86 assert(is_klass(), "bad cast");
87 return (ciKlass*)this;
88 }
89 ciInstanceKlass* as_instance_klass() {
90 assert(is_instance_klass(), "bad cast");
91 return (ciInstanceKlass*)this;
92 }
93 ciArrayKlass* as_array_klass() {
94 assert(is_array_klass(), "bad cast");
95 return (ciArrayKlass*)this;
96 }
97 ciObjArrayKlass* as_obj_array_klass() {
98 assert(is_obj_array_klass(), "bad cast");
99 return (ciObjArrayKlass*)this;
100 }
101 ciTypeArrayKlass* as_type_array_klass() {
102 assert(is_type_array_klass(), "bad cast");
103 return (ciTypeArrayKlass*)this;
104 }
105
106 Metadata* constant_encoding() { return _metadata; }
107
108 bool equals(ciMetadata* obj) const { return (this == obj); }
109
110 int hash() { return ident() * 31; } // ???
111
112 void print(outputStream* st);
113 virtual void print_impl(outputStream* st) {}
114 virtual const char* type_string() { return "ciMetadata"; }
115
116 void print() { print(tty); }
117 void print_metadata(outputStream* st = tty);
118
119 };
120 #endif // SHARE_VM_CI_CIMETADATA_HPP