Line data Source code
1 : /* src/vm/loader.hpp - class loader header
2 :
3 : Copyright (C) 1996-2013
4 : CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
5 :
6 : This file is part of CACAO.
7 :
8 : This program is free software; you can redistribute it and/or
9 : modify it under the terms of the GNU General Public License as
10 : published by the Free Software Foundation; either version 2, or (at
11 : your option) any later version.
12 :
13 : This program is distributed in the hope that it will be useful, but
14 : WITHOUT ANY WARRANTY; without even the implied warranty of
15 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 : General Public License for more details.
17 :
18 : You should have received a copy of the GNU General Public License
19 : along with this program; if not, write to the Free Software
20 : Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 : 02110-1301, USA.
22 :
23 : */
24 :
25 :
26 : #ifndef LOADER_HPP_
27 : #define LOADER_HPP_ 1
28 :
29 : #include "config.h"
30 :
31 : #include <stdint.h> // for uint8_t, int32_t
32 :
33 : #include "vm/global.hpp" // for java_handle_t, etc
34 : #include "vm/types.hpp" // for s4, s8
35 : #include "vm/utf8.hpp" // for Utf8String
36 :
37 : struct classinfo;
38 : struct constant_nameandtype;
39 :
40 : namespace cacao { struct ClassBuffer; }
41 :
42 :
43 : /* classloader *****************************************************************
44 :
45 : [!ENABLE_HANDLES]: The classloader is a Java Object which cannot move.
46 : [ENABLE_HANDLES] : The classloader entry itself is a static handle for a
47 : given classloader (use loader_hashtable_classloader_foo).
48 :
49 : *******************************************************************************/
50 :
51 : #if defined(ENABLE_HANDLES)
52 : typedef hashtable_classloader_entry classloader_t;
53 : #else
54 : typedef java_object_t classloader_t;
55 : #endif
56 :
57 : /* constant pool entries *******************************************************
58 :
59 : All constant pool entries need a data structure which contain the entrys
60 : value. In some cases this structure exist already, in the remaining cases
61 : this structure must be generated:
62 :
63 : kind structure generated?
64 : ----------------------------------------------------------------------
65 : CONSTANT_Class constant_classref yes
66 : CONSTANT_Fieldref constant_FMIref yes
67 : CONSTANT_Methodref constant_FMIref yes
68 : CONSTANT_InterfaceMethodref constant_FMIref yes
69 : CONSTANT_String unicode no
70 : CONSTANT_Integer int32_t yes
71 : CONSTANT_Float float yes
72 : CONSTANT_Long int64_t yes
73 : CONSTANT_Double double yes
74 : CONSTANT_NameAndType constant_nameandtype yes
75 : CONSTANT_Utf8 unicode no
76 : CONSTANT_UNUSED -
77 :
78 : *******************************************************************************/
79 :
80 : struct constant_nameandtype { /* NameAndType (Field or Method) */
81 576467 : constant_nameandtype(Utf8String name, Utf8String desc) : name(name), descriptor(desc) {}
82 :
83 : const Utf8String name; /* field/method name */
84 : const Utf8String descriptor; /* field/method type descriptor string */
85 : };
86 :
87 :
88 : /* hashtable_classloader_entry *************************************************
89 :
90 : ATTENTION: The pointer to the classloader object needs to be the
91 : first field of the entry, so that it can be used as an indirection
92 : cell. This is checked by gc_init() during startup.
93 :
94 : *******************************************************************************/
95 :
96 : struct hashtable_classloader_entry {
97 : java_object_t *object;
98 : hashtable_classloader_entry *hashlink;
99 : };
100 :
101 :
102 : namespace cacao {
103 : /**
104 : * A version of the Java class file format.
105 : *
106 : * @Cpp11 Make all methods, ctors, statics a constexpr
107 : */
108 : struct ClassFileVersion {
109 : /**
110 : * The class file format version supported by CACAO
111 : */
112 : static const ClassFileVersion CACAO_VERSION;
113 :
114 : /**
115 : * The class file format version used by JDK 7
116 : */
117 : static const ClassFileVersion JDK_7;
118 :
119 :
120 36120 : ClassFileVersion(uint16_t major, uint16_t minor = 0) : _majr(major), _minr(minor) {}
121 :
122 : bool operator ==(ClassFileVersion v) const {
123 : return _majr == v._majr && _minr == v._minr;
124 : }
125 :
126 : /// A strict weak ordering as required by STL
127 35790 : bool operator <(ClassFileVersion v) const {
128 35790 : if (_majr < v._majr)
129 0 : return true;
130 35790 : if (v._majr < _majr)
131 35790 : return false;
132 :
133 : // major versions are equal
134 :
135 0 : if (_minr < v._minr)
136 0 : return true;
137 0 : return false;
138 : }
139 :
140 : bool operator <=(ClassFileVersion v) const {
141 : return (*this == v) || (*this < v);
142 : }
143 :
144 : // we can't call these major/minor because GCC defines macros of that name
145 0 : uint16_t majr() const { return _majr; }
146 0 : uint16_t minr() const { return _minr; }
147 : private:
148 : uint16_t _majr, _minr;
149 : };
150 : }
151 :
152 :
153 : /* function prototypes ********************************************************/
154 :
155 : void loader_preinit(void);
156 : void loader_init(void);
157 :
158 : /* classloader management functions */
159 : classloader_t *loader_hashtable_classloader_add(java_handle_t *cl);
160 : classloader_t *loader_hashtable_classloader_find(java_handle_t *cl);
161 :
162 : void loader_load_all_classes(void);
163 :
164 : bool loader_skip_attribute_body(cacao::ClassBuffer& cb);
165 :
166 : #if defined(ENABLE_JAVASE)
167 : bool loader_load_attribute_signature(cacao::ClassBuffer& cb, Utf8String& signature);
168 : #endif
169 :
170 : /* free resources */
171 : void loader_close(void);
172 :
173 : /* class loading functions */
174 : classinfo *load_class_from_sysloader(Utf8String name);
175 : classinfo *load_class_from_classloader(Utf8String name, classloader_t *cl);
176 : classinfo *load_class_bootstrap(Utf8String name);
177 :
178 : /* (don't use the following directly) */
179 : classinfo *load_class_from_classbuffer(cacao::ClassBuffer& cb);
180 : classinfo *load_newly_created_array(classinfo *c, classloader_t *loader);
181 :
182 : #endif // LOADER_HPP_
183 :
184 :
185 : /*
186 : * These are local overrides for various environment variables in Emacs.
187 : * Please do not remove this and leave it at the end of the file, where
188 : * Emacs will automagically detect them.
189 : * ---------------------------------------------------------------------
190 : * Local variables:
191 : * mode: c++
192 : * indent-tabs-mode: t
193 : * c-basic-offset: 4
194 : * tab-width: 4
195 : * End:
196 : * vim:noexpandtab:sw=4:ts=4:
197 : */
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