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