src/vmcore/loader.h

   1 /* src/vmcore/loader.h - class loader 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: loader.h 7921 2007-05-20 23:14:11Z michi $
  26 */
  27
  28
  29 #ifndef _LOADER_H
  30 #define _LOADER_H
  31
  32 /* forward typedefs ***********************************************************/
  33
  34 typedef struct classbuffer classbuffer;
  35
  36
  37 #include "config.h"
  38
  39 #include <stdio.h>
  40
  41 #include "vm/types.h"
  42
  43 #include "vm/global.h"
  44
  45 #include "vmcore/descriptor.h"
  46 #include "vmcore/class.h"
  47 #include "vmcore/method.h"
  48 #include "vmcore/references.h"
  49 #include "vmcore/utf8.h"
  50
  51
  52 /* constant pool entries *******************************************************
  53
  54         All constant pool entries need a data structure which contain the entrys
  55         value. In some cases this structure exist already, in the remaining cases
  56         this structure must be generated:
  57
  58                 kind                      structure                     generated?
  59         ----------------------------------------------------------------------
  60     CONSTANT_Class               constant_classref                  yes
  61     CONSTANT_Fieldref            constant_FMIref                    yes
  62     CONSTANT_Methodref           constant_FMIref                    yes
  63     CONSTANT_InterfaceMethodref  constant_FMIref                    yes
  64     CONSTANT_String              unicode                             no
  65     CONSTANT_Integer             constant_integer                   yes
  66     CONSTANT_Float               constant_float                     yes
  67     CONSTANT_Long                constant_long                      yes
  68     CONSTANT_Double              constant_double                    yes
  69     CONSTANT_NameAndType         constant_nameandtype               yes
  70     CONSTANT_Utf8                unicode                             no
  71     CONSTANT_UNUSED              -
  72
  73 *******************************************************************************/
  74
  75 typedef struct {            /* Integer                                        */
  76         s4 value;
  77 } constant_integer;
  78
  79
  80 typedef struct {            /* Float                                          */
  81         float value;
  82 } constant_float;
  83
  84
  85 typedef struct {            /* Long                                           */
  86         s8 value;
  87 } constant_long;
  88
  89
  90 typedef struct {            /* Double                                         */
  91         double value;
  92 } constant_double;
  93
  94
  95 typedef struct {            /* NameAndType (Field or Method)                  */
  96         utf *name;              /* field/method name                              */
  97         utf *descriptor;        /* field/method type descriptor string            */
  98 } constant_nameandtype;
  99
 100
 101 /* classbuffer ****************************************************************/
 102
 103 struct classbuffer {
 104         classinfo *class;                   /* pointer to classinfo structure     */
 105         u1        *data;                    /* pointer to byte code               */
 106         s4         size;                    /* size of the byte code              */
 107         u1        *pos;                     /* current read position              */
 108         char      *path;                    /* path to file (for debugging)       */
 109 };
 110
 111
 112 /* hashtable_classloader_entry ************************************************/
 113
 114 typedef struct hashtable_classloader_entry hashtable_classloader_entry;
 115
 116 struct hashtable_classloader_entry {
 117         java_objectheader           *object;
 118         hashtable_classloader_entry *hashlink;
 119 };
 120
 121
 122 /* classloader ****************************************************************/
 123
 124 typedef hashtable_classloader_entry classloader;
 125
 126
 127 /* function prototypes ********************************************************/
 128
 129 /* initialize loader, load important systemclasses */
 130 bool loader_init(void);
 131
 132 /* classloader management functions */
 133 classloader *loader_hashtable_classloader_add(java_objectheader *cl);
 134 classloader *loader_hashtable_classloader_find(java_objectheader *cl);
 135
 136 void loader_load_all_classes(void);
 137
 138 bool loader_skip_attribute_body(classbuffer *cb);
 139
 140 #if defined(ENABLE_JAVASE)
 141 bool loader_load_attribute_signature(classbuffer *cb, utf **signature);
 142 #endif
 143
 144 /* free resources */
 145 void loader_close(void);
 146
 147 /* class loading functions */
 148 classinfo *load_class_from_sysloader(utf *name);
 149 classinfo *load_class_from_classloader(utf *name, classloader *cl);
 150 classinfo *load_class_bootstrap(utf *name);
 151
 152 /* (don't use the following directly) */
 153 classinfo *load_class_from_classbuffer(classbuffer *cb);
 154 classinfo *load_newly_created_array(classinfo *c, classloader *loader);
 155
 156 #endif /* _LOADER_H */
 157
 158 /*
 159  * These are local overrides for various environment variables in Emacs.
 160  * Please do not remove this and leave it at the end of the file, where
 161  * Emacs will automagically detect them.
 162  * ---------------------------------------------------------------------
 163  * Local variables:
 164  * mode: c
 165  * indent-tabs-mode: t
 166  * c-basic-offset: 4
 167  * tab-width: 4
 168  * End:
 169  * vim:noexpandtab:sw=4:ts=4:
 170  */