1 /* src/vm/descriptor.h - checking and parsing of field / method descriptors
3 Copyright (C) 1996-2011
4 CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
6 This file is part of CACAO.
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.
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.
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
29 /* forward typedefs ***********************************************************/
31 typedef struct descriptor_pool descriptor_pool;
32 typedef struct typedesc typedesc;
33 typedef struct paramdesc paramdesc;
34 typedef struct methoddesc methoddesc;
43 #include "toolbox/hashtable.h"
45 #include "vm/class.hpp"
46 #include "vm/global.h"
47 #include "vm/method.hpp"
48 #include "vm/references.h"
51 #include "arch.h" /* needed for HAS_ADDRESS_REGISTER_FILE */
54 /* data structures ************************************************************/
56 /*----------------------------------------------------------------------------*/
57 /* Descriptor Pools */
59 /* A descriptor_pool is a temporary data structure used during loading of */
60 /* a class. The descriptor_pool is used to allocate the table of */
61 /* constant_classrefs the class uses, and for parsing the field and method */
62 /* descriptors which occurr within the class. The inner workings of */
63 /* descriptor_pool are not important for outside code. */
65 /* You use a descriptor_pool as follows: */
67 /* 1. create one with descriptor_pool_new */
68 /* 2. add all explicit class references with descriptor_pool_add_class */
69 /* 3. add all field/method descriptors with descriptor_pool_add */
70 /* 4. call descriptor_pool_create_classrefs */
71 /* You can now lookup classrefs with descriptor_pool_lookup_classref */
72 /* 5. call descriptor_pool_alloc_parsed_descriptors */
73 /* 6. for each field descriptor call descriptor_pool_parse_field_descriptor */
74 /* for each method descriptor call descriptor_pool_parse_method_descriptor */
76 /* IMPORTANT: The descriptor_pool functions use DNEW and DMNEW for allocating */
77 /* memory which can be thrown away when the steps above have been */
79 /*----------------------------------------------------------------------------*/
81 struct descriptor_pool {
89 hashtable descriptorhash;
90 constant_classref *classrefs;
91 hashtable classrefhash;
92 u1 *descriptor_kind; /* useful for debugging */
93 u1 *descriptor_kind_next; /* useful for debugging */
97 /* data structures for parsed field/method descriptors ************************/
100 constant_classref *classref; /* class reference for TYPE_ADR types */
101 u1 type; /* TYPE_??? constant [1] */
102 u1 primitivetype; /* (PRIMITIVE)TYPE_??? constant [2] */
103 u1 arraydim; /* array dimension (0 if no array) */
106 /* [1]...the type field contains the basic type used within the VM. So ints, */
107 /* shorts, chars, bytes, booleans all have TYPE_INT. */
108 /* [2]...the primitivetype field contains the declared type. */
109 /* So short is PRIMITIVETYPE_SHORT, char is PRIMITIVETYPE_CHAR. */
110 /* For non-primitive types primitivetype is TYPE_ADR. */
113 #if defined(__MIPS__)
114 u1 type; /* TYPE_??? of the register allocated */
116 bool inmemory; /* argument in register or on stack */
117 uint32_t index; /* index into argument register array */
118 uint32_t regoff; /* register index or stack offset */
122 s2 paramcount; /* number of parameters */
123 s2 paramslots; /* like above but LONG,DOUBLE count twice */
124 s4 argintreguse; /* number of used integer argument registers */
125 s4 argfltreguse; /* number of used float argument registers */
126 #if defined(HAS_ADDRESS_REGISTER_FILE)
127 s4 argadrreguse; /* number of used address registers */
129 s4 memuse; /* number of stack slots used */
130 paramdesc *params; /* allocated parameter descriptions [3] */
131 typedesc returntype; /* parsed descriptor of the return type */
132 typedesc paramtypes[1]; /* parameter types, variable length! */
135 /* [3]...If params is NULL, the parameter descriptions have not yet been */
136 /* allocated. In this case ___the possible 'this' pointer of the method */
137 /* is NOT counted in paramcount/paramslots and it is NOT included in */
138 /* the paramtypes array___. */
139 /* If params != NULL, the parameter descriptions have been */
140 /* allocated, and the 'this' pointer of the method, if any, IS included.*/
141 /* In case the method has no parameters at all, the special value */
142 /* METHODDESC_NO_PARAMS is used (see below). */
144 /* METHODDESC_NO_PARAMS is a special value for the methoddesc.params field */
145 /* indicating that the method is a static method without any parameters. */
146 /* This special value must be != NULL and it may only be set if */
147 /* md->paramcount == 0. */
149 #define METHODDESC_NOPARAMS ((paramdesc*)1)
151 /* function prototypes ********************************************************/
157 descriptor_pool * descriptor_pool_new(classinfo *referer);
159 bool descriptor_pool_add_class(descriptor_pool *pool,utf *name);
160 bool descriptor_pool_add(descriptor_pool *pool,utf *desc,int *paramslots);
162 int descriptor_to_basic_type(utf *desc);
163 int descriptor_typesize(typedesc *td);
165 constant_classref * descriptor_pool_create_classrefs(descriptor_pool *pool,
167 constant_classref * descriptor_pool_lookup_classref(descriptor_pool *pool,utf *classname);
169 void descriptor_pool_alloc_parsed_descriptors(descriptor_pool *pool);
171 typedesc *descriptor_pool_parse_field_descriptor(descriptor_pool *pool, utf *desc);
172 methoddesc *descriptor_pool_parse_method_descriptor(descriptor_pool *pool, utf *desc, s4 mflags,
173 constant_classref *thisclass);
175 bool descriptor_params_from_paramtypes(methoddesc *md, s4 mflags);
177 void descriptor_pool_get_sizes(descriptor_pool *pool, u4 *classrefsize,
181 void descriptor_debug_print_typedesc(FILE *file,typedesc *d);
182 void descriptor_debug_print_methoddesc(FILE *file,methoddesc *d);
183 void descriptor_debug_print_paramdesc(FILE *file,paramdesc *d);
184 void descriptor_pool_debug_dump(descriptor_pool *pool, FILE *file);
185 #endif /* !defined(NDEBUG) */
191 #endif /* _DESCRIPTOR_H */
195 * These are local overrides for various environment variables in Emacs.
196 * Please do not remove this and leave it at the end of the file, where
197 * Emacs will automagically detect them.
198 * ---------------------------------------------------------------------
201 * indent-tabs-mode: t
205 * vim:noexpandtab:sw=4:ts=4: