ciMetadata.hpp revision 3602: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
38class 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
121