62f3026b6327fa2a35255cfee27345fb33b27b6f
[cacao.git] / src / vmcore / class.h
1 /* src/vmcore/class.h - class related functions header
2
3    Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
4    C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
5    E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
6    J. Wenninger, Institut f. Computersprachen - TU Wien
7
8    This file is part of CACAO.
9
10    This program is free software; you can redistribute it and/or
11    modify it under the terms of the GNU General Public License as
12    published by the Free Software Foundation; either version 2, or (at
13    your option) any later version.
14
15    This program is distributed in the hope that it will be useful, but
16    WITHOUT ANY WARRANTY; without even the implied warranty of
17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18    General Public License for more details.
19
20    You should have received a copy of the GNU General Public License
21    along with this program; if not, write to the Free Software
22    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23    02110-1301, USA.
24
25    $Id: class.h 8395 2007-08-22 13:12:46Z panzi $
26
27 */
28
29
30 #ifndef _CLASS_H
31 #define _CLASS_H
32
33 /* forward typedefs ***********************************************************/
34
35 typedef struct classinfo      classinfo; 
36 typedef struct innerclassinfo innerclassinfo;
37 typedef struct extra_classref extra_classref;
38 typedef struct castinfo       castinfo;
39
40
41 #include "config.h"
42
43 #include <stdint.h>
44
45 #include "vm/types.h"
46
47 #include "toolbox/list.h"
48
49 #include "vm/global.h"
50
51 #if defined(ENABLE_JAVASE)
52 # include "vmcore/annotation.h"
53 #endif
54
55 #include "vmcore/field.h"
56 #include "vmcore/linker.h"
57 #include "vmcore/loader.h"
58 #include "vmcore/method.h"
59 #include "vmcore/references.h"
60 #include "vmcore/utf8.h"
61
62
63 /* class state defines ********************************************************/
64
65 #define CLASS_LOADING         0x0001
66 #define CLASS_LOADED          0x0002
67 #define CLASS_LINKING         0x0004
68 #define CLASS_LINKED          0x0008
69 #define CLASS_INITIALIZING    0x0010
70 #define CLASS_INITIALIZED     0x0020
71 #define CLASS_ERROR           0x0040
72
73
74 /* some macros ****************************************************************/
75
76 #define CLASS_IS_OR_ALMOST_INITIALIZED(c) \
77     (((c)->state & CLASS_INITIALIZING) || ((c)->state & CLASS_INITIALIZED))
78
79
80 /* classinfo ******************************************************************/
81
82 /* We define this dummy structure of java_lang_Class so we can
83    bootstrap cacaoh without needing a java_lang_Class.h file.  Whether
84    the size of the dummy structure is big enough is checked during
85    runtime in vm_create. */
86
87 typedef struct {
88         java_object_t      header;
89 #if defined(WITH_CLASSPATH_GNU)
90         intptr_t           padding[4];
91 #elif defined(WITH_CLASSPATH_SUN)
92         intptr_t           padding[19];
93 #elif defined(WITH_CLASSPATH_CLDC1_1)
94         intptr_t           padding[3];
95 #else
96 # error unknown classpath configuration
97 #endif
98 } dummy_java_lang_Class;
99
100 struct classinfo {                /* class structure                          */
101         dummy_java_lang_Class object;
102
103         s4          flags;            /* ACC flags                                */
104         utf        *name;             /* class name                               */
105
106         s4          cpcount;          /* number of entries in constant pool       */
107         u1         *cptags;           /* constant pool tags                       */
108         voidptr    *cpinfos;          /* pointer to constant pool info structures */
109
110         s4          classrefcount;    /* number of symbolic class references      */
111         constant_classref *classrefs; /* table of symbolic class references       */
112         extra_classref *extclassrefs; /* additional classrefs                     */
113         s4          parseddescsize;   /* size of the parsed descriptors block     */
114         u1         *parseddescs;      /* parsed descriptors                       */
115
116         classref_or_classinfo super;  /* super class                              */
117         classinfo  *sub;              /* sub class pointer                        */
118         classinfo  *nextsub;          /* pointer to next class in sub class list  */
119
120         s4          interfacescount;  /* number of interfaces                     */
121         classref_or_classinfo *interfaces; /* superinterfaces                     */
122
123         s4          fieldscount;      /* number of fields                         */
124         fieldinfo  *fields;           /* field table                              */
125
126         s4          methodscount;     /* number of methods                        */
127         methodinfo *methods;          /* method table                             */
128
129         s4          state;            /* current class state                      */
130         s4          index;            /* hierarchy depth (classes) or index       */
131                                       /* (interfaces)                             */
132         s4          instancesize;     /* size of an instance of this class        */
133
134         vftbl_t    *vftbl;            /* pointer to virtual function table        */
135
136         methodinfo *finalizer;        /* finalizer method                         */
137
138         u2          innerclasscount;  /* number of inner classes                  */
139         innerclassinfo *innerclass;
140
141         classref_or_classinfo  declaringclass;
142         classref_or_classinfo  enclosingclass;  /* enclosing class                */
143         constant_nameandtype  *enclosingmethod; /* enclosing method               */
144
145         utf        *packagename;      /* full name of the package                 */
146         utf        *sourcefile;       /* SourceFile attribute                     */
147 #if defined(ENABLE_JAVASE)
148         utf        *signature;        /* Signature attribute                      */
149 #if defined(ENABLE_ANNOTATIONS)
150         /* all the anntation attributes are NULL (and not a zero length array)
151            if there is nothing */
152         annotation_bytearray_t  *annotations; /* annotations of this class        */
153         
154         annotation_bytearrays_t *method_annotations; /* array of annotations for  */
155                                       /* the methods                              */
156         annotation_bytearrays_t *method_parameterannotations; /* array of         */
157                                       /* parameter annotations for the methods    */
158         annotation_bytearrays_t *method_annotationdefaults; /* array for          */
159                                       /* annotation default values for the        */
160                                       /* methods                                  */
161
162         annotation_bytearrays_t *field_annotations; /* array of annotations for   */
163                                       /* the fields                               */
164 #endif
165 #endif
166         classloader *classloader;       /* NULL for bootstrap classloader         */
167
168 #if defined(ENABLE_JAVASE)
169 # if defined(WITH_CLASSPATH_SUN)
170         java_object_t *protectiondomain;
171 # endif
172 #endif
173 };
174
175
176 /* innerclassinfo *************************************************************/
177
178 struct innerclassinfo {
179         classref_or_classinfo inner_class; /* inner class pointer                 */
180         classref_or_classinfo outer_class; /* outer class pointer                 */
181         utf                  *name;        /* innerclass name                     */
182         s4                    flags;       /* ACC flags                           */
183 };
184
185
186 /* extra_classref **************************************************************
187
188    for classrefs not occurring within descriptors
189
190 *******************************************************************************/
191
192 struct extra_classref {
193         extra_classref    *next;
194         constant_classref  classref;
195 };
196
197
198 /* castinfo *******************************************************************/
199
200 struct castinfo {
201         s4 super_baseval;
202         s4 super_diffval;
203         s4 sub_baseval;
204 };
205
206
207 /* global variables ***********************************************************/
208
209 /* frequently used classes ****************************************************/
210
211 /* important system classes */
212
213 extern classinfo *class_java_lang_Object;
214 extern classinfo *class_java_lang_Class;
215 extern classinfo *class_java_lang_ClassLoader;
216 extern classinfo *class_java_lang_Cloneable;
217 extern classinfo *class_java_lang_SecurityManager;
218 extern classinfo *class_java_lang_String;
219 extern classinfo *class_java_lang_System;
220 extern classinfo *class_java_lang_Thread;
221 extern classinfo *class_java_lang_ThreadGroup;
222 extern classinfo *class_java_lang_VMSystem;
223 extern classinfo *class_java_lang_VMThread;
224 extern classinfo *class_java_io_Serializable;
225
226 #if defined(WITH_CLASSPATH_SUN)
227 extern classinfo *class_sun_reflect_MagicAccessorImpl;
228 #endif
229
230 /* system exception classes required in cacao */
231
232 extern classinfo *class_java_lang_Throwable;
233 extern classinfo *class_java_lang_Error;
234 extern classinfo *class_java_lang_LinkageError;
235 extern classinfo *class_java_lang_NoClassDefFoundError;
236 extern classinfo *class_java_lang_OutOfMemoryError;
237 extern classinfo *class_java_lang_VirtualMachineError;
238
239 #if defined(WITH_CLASSPATH_GNU)
240 extern classinfo *class_java_lang_VMThrowable;
241 #endif
242
243 extern classinfo *class_java_lang_Exception;
244 extern classinfo *class_java_lang_ClassCastException;
245 extern classinfo *class_java_lang_ClassNotFoundException;
246
247 #if defined(ENABLE_JAVASE)
248 extern classinfo *class_java_lang_Void;
249
250 #if defined(ENABLE_ANNOTATIONS)
251 extern classinfo *class_sun_reflect_ConstantPool;
252 #if defined(WITH_CLASSPATH_GNU)
253 extern classinfo *class_sun_reflect_annotation_AnnotationParser;
254 #endif
255 #endif
256 #endif
257
258 extern classinfo *class_java_lang_Boolean;
259 extern classinfo *class_java_lang_Byte;
260 extern classinfo *class_java_lang_Character;
261 extern classinfo *class_java_lang_Short;
262 extern classinfo *class_java_lang_Integer;
263 extern classinfo *class_java_lang_Long;
264 extern classinfo *class_java_lang_Float;
265 extern classinfo *class_java_lang_Double;
266
267
268 /* some runtime exception */
269
270 extern classinfo *class_java_lang_NullPointerException;
271
272
273 /* some classes which may be used more often */
274
275 #if defined(ENABLE_JAVASE)
276 extern classinfo *class_java_lang_StackTraceElement;
277 extern classinfo *class_java_lang_reflect_Constructor;
278 extern classinfo *class_java_lang_reflect_Field;
279 extern classinfo *class_java_lang_reflect_Method;
280 extern classinfo *class_java_security_PrivilegedAction;
281 extern classinfo *class_java_util_Vector;
282
283 extern classinfo *arrayclass_java_lang_Object;
284 #endif
285
286
287 /* pseudo classes for the type checker ****************************************/
288
289 /*
290  * pseudo_class_Arraystub
291  *     (extends Object implements Cloneable, java.io.Serializable)
292  *
293  *     If two arrays of incompatible component types are merged,
294  *     the resulting reference has no accessible components.
295  *     The result does, however, implement the interfaces Cloneable
296  *     and java.io.Serializable. This pseudo class is used internally
297  *     to represent such results. (They are *not* considered arrays!)
298  *
299  * pseudo_class_Null
300  *
301  *     This pseudo class is used internally to represent the
302  *     null type.
303  *
304  * pseudo_class_New
305  *
306  *     This pseudo class is used internally to represent the
307  *     the 'uninitialized object' type.
308  */
309
310 extern classinfo *pseudo_class_Arraystub;
311 extern classinfo *pseudo_class_Null;
312 extern classinfo *pseudo_class_New;
313
314
315 /* function prototypes ********************************************************/
316
317 classinfo *class_create_classinfo(utf *u);
318 void       class_postset_header_vftbl(void);
319 classinfo *class_define(utf *name, classloader *cl, int32_t length, const uint8_t *data, java_handle_t *pd);
320 void       class_set_packagename(classinfo *c);
321
322 bool       class_load_attributes(classbuffer *cb);
323
324 /* retrieve constantpool element */
325 voidptr class_getconstant(classinfo *class, u4 pos, u4 ctype);
326 voidptr innerclass_getconstant(classinfo *c, u4 pos, u4 ctype);
327
328 /* frees all resources used by the class */
329 void class_free(classinfo *);
330
331 /* return an array class with the given component class */
332 classinfo *class_array_of(classinfo *component,bool link);
333
334 /* return an array class with the given dimension and element class */
335 classinfo *class_multiarray_of(s4 dim, classinfo *element,bool link);
336
337 /* return a classref for the given class name */
338 /* (does a linear search!)                    */
339 constant_classref *class_lookup_classref(classinfo *cls,utf *name);
340
341 /* return a classref for the given class name */
342 /* (does a linear search!)                    */
343 constant_classref *class_get_classref(classinfo *cls,utf *name);
344
345 /* return a classref to the class itself */
346 /* (does a linear search!)                    */
347 constant_classref *class_get_self_classref(classinfo *cls);
348
349 /* return a classref for an array with the given dimension of with the */
350 /* given component type */
351 constant_classref *class_get_classref_multiarray_of(s4 dim,constant_classref *ref);
352
353 /* return a classref for the component type of the given array type */
354 constant_classref *class_get_classref_component_of(constant_classref *ref);
355
356 /* get a class' field by name and descriptor */
357 fieldinfo *class_findfield(classinfo *c, utf *name, utf *desc);
358
359 /* search 'classinfo'-structure for a field with the specified name */
360 fieldinfo *class_findfield_by_name(classinfo *c, utf *name);
361 s4 class_findfield_index_by_name(classinfo *c, utf *name);
362
363 /* search class for a field */
364 fieldinfo *class_resolvefield(classinfo *c, utf *name, utf *desc, classinfo *referer, bool throwexception);
365
366 /* search for a method with a specified name and descriptor */
367 methodinfo *class_findmethod(classinfo *c, utf *name, utf *desc);
368 methodinfo *class_resolvemethod(classinfo *c, utf *name, utf *dest);
369 methodinfo *class_resolveclassmethod(classinfo *c, utf *name, utf *dest, classinfo *referer, bool throwexception);
370 methodinfo *class_resolveinterfacemethod(classinfo *c, utf *name, utf *dest, classinfo *referer, bool throwexception);
371
372 bool class_issubclass(classinfo *sub, classinfo *super);
373 bool class_isanysubclass(classinfo *sub, classinfo *super);
374
375 bool                       class_is_primitive(classinfo *c);
376 bool                       class_is_anonymousclass(classinfo *c);
377 bool                       class_is_array(classinfo *c);
378 bool                       class_is_interface(classinfo *c);
379 bool                       class_is_localclass(classinfo *c);
380 bool                       class_is_memberclass(classinfo *c);
381
382 classinfo                 *class_get_superclass(classinfo *c);
383 classinfo                 *class_get_componenttype(classinfo *c);
384 java_handle_objectarray_t *class_get_declaredclasses(classinfo *c, bool publicOnly);
385 classinfo                 *class_get_declaringclass(classinfo *c);
386 classinfo                 *class_get_enclosingclass(classinfo *c);
387 java_handle_objectarray_t *class_get_interfaces(classinfo *c);
388 java_handle_bytearray_t   *class_get_annotations(classinfo *c);
389
390 #if defined(ENABLE_JAVASE)
391 utf                       *class_get_signature(classinfo *c);
392 #endif
393
394 /* some debugging functions */
395
396 #if !defined(NDEBUG)
397 void class_printflags(classinfo *c);
398 void class_print(classinfo *c);
399 void class_println(classinfo *c);
400 void class_classref_print(constant_classref *cr);
401 void class_classref_println(constant_classref *cr);
402 void class_classref_or_classinfo_print(classref_or_classinfo c);
403 void class_classref_or_classinfo_println(classref_or_classinfo c);
404 #endif
405
406 /* debug purposes */
407 void class_showmethods(classinfo *c);
408 void class_showconstantpool(classinfo *c);
409
410 #endif /* _CLASS_H */
411
412
413 /*
414  * These are local overrides for various environment variables in Emacs.
415  * Please do not remove this and leave it at the end of the file, where
416  * Emacs will automagically detect them.
417  * ---------------------------------------------------------------------
418  * Local variables:
419  * mode: c
420  * indent-tabs-mode: t
421  * c-basic-offset: 4
422  * tab-width: 4
423  * End:
424  */