gdb/cp-abi.c

   1 /* Generic code for supporting multiple C++ ABI's
   2
   3    Copyright 2001, 2002, 2003, 2005 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23 #include "value.h"
  24 #include "cp-abi.h"
  25 #include "command.h"
  26 #include "gdbcmd.h"
  27 #include "ui-out.h"
  28
  29 #include "gdb_string.h"
  30
  31 static struct cp_abi_ops *find_cp_abi (const char *short_name);
  32
  33 static struct cp_abi_ops current_cp_abi = { "", NULL };
  34 static struct cp_abi_ops auto_cp_abi = { "auto", NULL };
  35
  36 #define CP_ABI_MAX 8
  37 static struct cp_abi_ops *cp_abis[CP_ABI_MAX];
  38 static int num_cp_abis = 0;
  39
  40 enum ctor_kinds
  41 is_constructor_name (const char *name)
  42 {
  43   if ((current_cp_abi.is_constructor_name) == NULL)
  44     error (_("ABI doesn't define required function is_constructor_name"));
  45   return (*current_cp_abi.is_constructor_name) (name);
  46 }
  47
  48 enum dtor_kinds
  49 is_destructor_name (const char *name)
  50 {
  51   if ((current_cp_abi.is_destructor_name) == NULL)
  52     error (_("ABI doesn't define required function is_destructor_name"));
  53   return (*current_cp_abi.is_destructor_name) (name);
  54 }
  55
  56 int
  57 is_vtable_name (const char *name)
  58 {
  59   if ((current_cp_abi.is_vtable_name) == NULL)
  60     error (_("ABI doesn't define required function is_vtable_name"));
  61   return (*current_cp_abi.is_vtable_name) (name);
  62 }
  63
  64 int
  65 is_operator_name (const char *name)
  66 {
  67   if ((current_cp_abi.is_operator_name) == NULL)
  68     error (_("ABI doesn't define required function is_operator_name"));
  69   return (*current_cp_abi.is_operator_name) (name);
  70 }
  71
  72 int
  73 baseclass_offset (struct type *type, int index, const bfd_byte *valaddr,
  74                   CORE_ADDR address)
  75 {
  76   if (current_cp_abi.baseclass_offset == NULL)
  77     error (_("ABI doesn't define required function baseclass_offset"));
  78   return (*current_cp_abi.baseclass_offset) (type, index, valaddr, address);
  79 }
  80
  81 struct value *
  82 value_virtual_fn_field (struct value **arg1p, struct fn_field *f, int j,
  83                         struct type *type, int offset)
  84 {
  85   if ((current_cp_abi.virtual_fn_field) == NULL)
  86     return NULL;
  87   return (*current_cp_abi.virtual_fn_field) (arg1p, f, j, type, offset);
  88 }
  89
  90 struct type *
  91 value_rtti_type (struct value *v, int *full, int *top, int *using_enc)
  92 {
  93   if ((current_cp_abi.rtti_type) == NULL)
  94     return NULL;
  95   return (*current_cp_abi.rtti_type) (v, full, top, using_enc);
  96 }
  97
  98 /* Set the current C++ ABI to SHORT_NAME.  */
  99
 100 static int
 101 switch_to_cp_abi (const char *short_name)
 102 {
 103   struct cp_abi_ops *abi;
 104
 105   abi = find_cp_abi (short_name);
 106   if (abi == NULL)
 107     return 0;
 108
 109   current_cp_abi = *abi;
 110   return 1;
 111 }
 112
 113 /* Add ABI to the list of supported C++ ABI's.  */
 114
 115 int
 116 register_cp_abi (struct cp_abi_ops *abi)
 117 {
 118   if (num_cp_abis == CP_ABI_MAX)
 119     internal_error (__FILE__, __LINE__,
 120                     "Too many C++ ABIs, please increase CP_ABI_MAX in cp-abi.c");
 121
 122   cp_abis[num_cp_abis++] = abi;
 123
 124   return 1;
 125 }
 126
 127 /* Set the ABI to use in "auto" mode to SHORT_NAME.  */
 128
 129 void
 130 set_cp_abi_as_auto_default (const char *short_name)
 131 {
 132   char *new_longname, *new_doc;
 133   struct cp_abi_ops *abi = find_cp_abi (short_name);
 134
 135   if (abi == NULL)
 136     internal_error (__FILE__, __LINE__,
 137                     "Cannot find C++ ABI \"%s\" to set it as auto default.",
 138                     short_name);
 139
 140   if (auto_cp_abi.longname != NULL)
 141     xfree ((char *) auto_cp_abi.longname);
 142   if (auto_cp_abi.doc != NULL)
 143     xfree ((char *) auto_cp_abi.doc);
 144
 145   auto_cp_abi = *abi;
 146
 147   auto_cp_abi.shortname = "auto";
 148   new_longname = xmalloc (strlen ("currently ") + 1 + strlen (abi->shortname)
 149                           + 1 + 1);
 150   sprintf (new_longname, "currently \"%s\"", abi->shortname);
 151   auto_cp_abi.longname = new_longname;
 152
 153   new_doc = xmalloc (strlen ("Automatically selected; currently ")
 154                      + 1 + strlen (abi->shortname) + 1 + 1);
 155   sprintf (new_doc, "Automatically selected; currently \"%s\"", abi->shortname);
 156   auto_cp_abi.doc = new_doc;
 157
 158   /* Since we copy the current ABI into current_cp_abi instead of
 159      using a pointer, if auto is currently the default, we need to
 160      reset it.  */
 161   if (strcmp (current_cp_abi.shortname, "auto") == 0)
 162     switch_to_cp_abi ("auto");
 163 }
 164
 165 /* Return the ABI operations associated with SHORT_NAME.  */
 166
 167 static struct cp_abi_ops *
 168 find_cp_abi (const char *short_name)
 169 {
 170   int i;
 171
 172   for (i = 0; i < num_cp_abis; i++)
 173     if (strcmp (cp_abis[i]->shortname, short_name) == 0)
 174       return cp_abis[i];
 175
 176   return NULL;
 177 }
 178
 179 /* Display the list of registered C++ ABIs.  */
 180
 181 static void
 182 list_cp_abis (int from_tty)
 183 {
 184   struct cleanup *cleanup_chain;
 185   int i;
 186   ui_out_text (uiout, "The available C++ ABIs are:\n");
 187
 188   cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "cp-abi-list");
 189   for (i = 0; i < num_cp_abis; i++)
 190     {
 191       char pad[14];
 192       int padcount;
 193
 194       ui_out_text (uiout, "  ");
 195       ui_out_field_string (uiout, "cp-abi", cp_abis[i]->shortname);
 196
 197       padcount = 16 - 2 - strlen (cp_abis[i]->shortname);
 198       pad[padcount] = 0;
 199       while (padcount > 0)
 200         pad[--padcount] = ' ';
 201       ui_out_text (uiout, pad);
 202
 203       ui_out_field_string (uiout, "doc", cp_abis[i]->doc);
 204       ui_out_text (uiout, "\n");
 205     }
 206   do_cleanups (cleanup_chain);
 207 }
 208
 209 /* Set the current C++ ABI, or display the list of options if no
 210    argument is given.  */
 211
 212 static void
 213 set_cp_abi_cmd (char *args, int from_tty)
 214 {
 215   if (args == NULL)
 216     {
 217       list_cp_abis (from_tty);
 218       return;
 219     }
 220
 221   if (!switch_to_cp_abi (args))
 222     error (_("Could not find \"%s\" in ABI list"), args);
 223 }
 224
 225 /* Show the currently selected C++ ABI.  */
 226
 227 static void
 228 show_cp_abi_cmd (char *args, int from_tty)
 229 {
 230   ui_out_text (uiout, "The currently selected C++ ABI is \"");
 231
 232   ui_out_field_string (uiout, "cp-abi", current_cp_abi.shortname);
 233   ui_out_text (uiout, "\" (");
 234   ui_out_field_string (uiout, "longname", current_cp_abi.longname);
 235   ui_out_text (uiout, ").\n");
 236 }
 237
 238 extern initialize_file_ftype _initialize_cp_abi; /* -Wmissing-prototypes */
 239
 240 void
 241 _initialize_cp_abi (void)
 242 {
 243   register_cp_abi (&auto_cp_abi);
 244   switch_to_cp_abi ("auto");
 245
 246   add_cmd ("cp-abi", class_obscure, set_cp_abi_cmd,
 247            "Set the ABI used for inspecting C++ objects.\n"
 248            "\"set cp-abi\" with no arguments will list the available ABIs.",
 249            &setlist);
 250
 251   add_cmd ("cp-abi", class_obscure, show_cp_abi_cmd,
 252            "Show the ABI used for inspecting C++ objects.", &showlist);
 253 }