src/vm/resolve.h

   1 /* vm/resolve.h - resolving classes/interfaces/fields/methods
   2
   3    Copyright (C) 1996-2005, 2006 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    Contact: cacao@cacaojvm.org
  26
  27    Authors: Edwin Steiner
  28
  29    Changes:
  30
  31    $Id: resolve.h 5332 2006-09-05 19:38:28Z twisti $
  32
  33 */
  34
  35
  36 #ifndef _RESOLVE_H
  37 #define _RESOLVE_H
  38
  39 /* forward declarations *******************************************************/
  40
  41 typedef struct unresolved_class unresolved_class;
  42 typedef struct unresolved_field unresolved_field;
  43 typedef struct unresolved_method unresolved_method;
  44 typedef struct unresolved_subtype_set unresolved_subtype_set;
  45
  46
  47 #include "config.h"
  48 #include "vm/types.h"
  49 #include "vm/global.h"
  50 #include "vm/references.h"
  51 #include "vm/jit/jit.h"
  52 #include "vm/jit/verify/typeinfo.h"
  53
  54
  55 /* constants ******************************************************************/
  56
  57 #define RESOLVE_STATIC    0x0001  /* ref to static fields/methods             */
  58 #define RESOLVE_PUTFIELD  0x0002  /* field ref inside a PUT{FIELD,STATIC}...  */
  59 #define RESOLVE_SPECIAL   0x0004  /* method ref inside INVOKESPECIAL          */
  60
  61
  62 /* enums **********************************************************************/
  63
  64 typedef enum {
  65         resolveLazy,
  66         resolveEager
  67 } resolve_mode_t;
  68
  69 typedef enum {
  70         resolveLinkageError,
  71         resolveIllegalAccessError
  72 } resolve_err_t;
  73
  74 typedef enum {
  75         resolveFailed = false,  /* this must be a false value */
  76         resolveDeferred = true, /* this must be a true value  */
  77         resolveSucceeded
  78 } resolve_result_t;
  79
  80 /* structs ********************************************************************/
  81
  82 struct unresolved_subtype_set {
  83         classref_or_classinfo *subtyperefs;     /* NULL terminated list */
  84 };
  85
  86 struct unresolved_class {
  87         constant_classref      *classref;
  88         methodinfo                     *referermethod;
  89         unresolved_subtype_set  subtypeconstraints;
  90 };
  91
  92 /* XXX unify heads of unresolved_field and unresolved_method? */
  93
  94 struct unresolved_field {
  95         constant_FMIref *fieldref;
  96         methodinfo      *referermethod;
  97         s4               flags;
  98
  99         unresolved_subtype_set  instancetypes;
 100         unresolved_subtype_set  valueconstraints;
 101 };
 102
 103 struct unresolved_method {
 104         constant_FMIref *methodref;
 105         methodinfo      *referermethod;
 106         s4               flags;
 107
 108         unresolved_subtype_set  instancetypes;
 109         unresolved_subtype_set *paramconstraints;
 110 };
 111
 112 #define SUBTYPESET_IS_EMPTY(stset) \
 113         ((stset).subtyperefs == NULL)
 114
 115 #define UNRESOLVED_SUBTYPE_SET_EMTPY(stset) \
 116         do { (stset).subtyperefs = NULL; } while(0)
 117
 118 /* function prototypes ********************************************************/
 119
 120 bool resolve_class_from_name(classinfo* referer,methodinfo *refmethod,
 121                                                 utf *classname,
 122                                                 resolve_mode_t mode,
 123                                                 bool checkaccess,
 124                                                 bool link,
 125                                                 classinfo **result);
 126
 127 bool resolve_classref(methodinfo *refmethod,
 128                                  constant_classref *ref,
 129                                  resolve_mode_t mode,
 130                                  bool checkaccess,
 131                              bool link,
 132                                  classinfo **result);
 133
 134 bool resolve_classref_or_classinfo(methodinfo *refmethod,
 135                                                           classref_or_classinfo cls,
 136                                                           resolve_mode_t mode,
 137                                                           bool checkaccess,
 138                                                           bool link,
 139                                                           classinfo **result);
 140
 141 bool resolve_class_from_typedesc(typedesc *d,bool checkaccess,bool link,classinfo **result);
 142
 143 #ifdef ENABLE_VERIFIER
 144 bool resolve_class(unresolved_class *ref,
 145                           resolve_mode_t mode,
 146                           bool checkaccess,
 147                           classinfo **result);
 148
 149 classinfo * resolve_class_eager(unresolved_class *ref);
 150 #endif /* ENABLE_VERIFIER */
 151
 152 bool resolve_field(unresolved_field *ref,
 153                           resolve_mode_t mode,
 154                           fieldinfo **result);
 155
 156 bool resolve_method(unresolved_method *ref,
 157                           resolve_mode_t mode,
 158                            methodinfo **result);
 159
 160 classinfo * resolve_classref_eager(constant_classref *ref);
 161 classinfo * resolve_classref_eager_nonabstract(constant_classref *ref);
 162 fieldinfo * resolve_field_eager(unresolved_field *ref);
 163 methodinfo * resolve_method_eager(unresolved_method *ref);
 164
 165 #ifdef ENABLE_VERIFIER
 166 unresolved_class * create_unresolved_class(methodinfo *refmethod,
 167                                                 constant_classref *classref,
 168                                                 typeinfo *valuetype);
 169 #endif
 170
 171 unresolved_field *new_create_unresolved_field(classinfo *referer,
 172                                                                                           methodinfo *refmethod,
 173                                                                                           instruction *iptr);
 174
 175 unresolved_method *new_create_unresolved_method(classinfo *referer,
 176                                                                                                 methodinfo *refmethod,
 177                                                                                                 instruction *iptr);
 178
 179 void unresolved_class_free(unresolved_class *ref);
 180 void unresolved_field_free(unresolved_field *ref);
 181 void unresolved_method_free(unresolved_method *ref);
 182
 183 resolve_result_t new_resolve_method_lazy(instruction *iptr,
 184                                                                                  methodinfo *refmethod);
 185
 186 resolve_result_t new_resolve_field_lazy(instruction *iptr,
 187                                                                                 methodinfo *refmethod);
 188
 189 #ifdef ENABLE_VERIFIER
 190 bool new_constrain_unresolved_field(unresolved_field *ref, classinfo *referer,
 191                                                                         methodinfo *refmethod, instruction *iptr);
 192
 193 bool new_constrain_unresolved_method(unresolved_method *ref, classinfo *referer,
 194                                                                          methodinfo *refmethod, instruction *iptr);
 195
 196 #endif
 197
 198 #ifndef NDEBUG
 199 void unresolved_class_debug_dump(unresolved_class *ref,FILE *file);
 200 void unresolved_field_debug_dump(unresolved_field *ref,FILE *file);
 201 void unresolved_method_debug_dump(unresolved_method *ref,FILE *file);
 202 void unresolved_subtype_set_debug_dump(unresolved_subtype_set *stset,FILE *file);
 203 #endif
 204
 205 #endif /* _RESOLVE_H */
 206
 207 /*
 208  * These are local overrides for various environment variables in Emacs.
 209  * Please do not remove this and leave it at the end of the file, where
 210  * Emacs will automagically detect them.
 211  * ---------------------------------------------------------------------
 212  * Local variables:
 213  * mode: c
 214  * indent-tabs-mode: t
 215  * c-basic-offset: 4
 216  * tab-width: 4
 217  * End:
 218  * vim:noexpandtab:sw=4:ts=4:
 219  */
 220