1 /* Generic code for supporting multiple C++ ABI's 2 3 Copyright (C) 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009, 2010 4 Free Software Foundation, Inc. 5 6 This file is part of GDB. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 20 21 #include "defs.h" 22 #include "value.h" 23 #include "cp-abi.h" 24 #include "command.h" 25 #include "exceptions.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 struct type *ret = NULL; 94 struct gdb_exception e; 95 96 if ((current_cp_abi.rtti_type) == NULL) 97 return NULL; 98 TRY_CATCH (e, RETURN_MASK_ERROR) 99 { 100 ret = (*current_cp_abi.rtti_type) (v, full, top, using_enc); 101 } 102 if (e.reason < 0) 103 return NULL; 104 return ret; 105 } 106 107 void 108 cplus_print_method_ptr (const gdb_byte *contents, struct type *type, 109 struct ui_file *stream) 110 { 111 if (current_cp_abi.print_method_ptr == NULL) 112 error (_("GDB does not support pointers to methods on this target")); 113 (*current_cp_abi.print_method_ptr) (contents, type, stream); 114 } 115 116 int 117 cplus_method_ptr_size (struct type *to_type) 118 { 119 if (current_cp_abi.method_ptr_size == NULL) 120 error (_("GDB does not support pointers to methods on this target")); 121 return (*current_cp_abi.method_ptr_size) (to_type); 122 } 123 124 void 125 cplus_make_method_ptr (struct type *type, gdb_byte *contents, 126 CORE_ADDR value, int is_virtual) 127 { 128 if (current_cp_abi.make_method_ptr == NULL) 129 error (_("GDB does not support pointers to methods on this target")); 130 (*current_cp_abi.make_method_ptr) (type, contents, value, is_virtual); 131 } 132 133 CORE_ADDR 134 cplus_skip_trampoline (struct frame_info *frame, CORE_ADDR stop_pc) 135 { 136 if (current_cp_abi.skip_trampoline == NULL) 137 return 0; 138 return (*current_cp_abi.skip_trampoline) (frame, stop_pc); 139 } 140 141 struct value * 142 cplus_method_ptr_to_value (struct value **this_p, struct value *method_ptr) 143 { 144 if (current_cp_abi.method_ptr_to_value == NULL) 145 error (_("GDB does not support pointers to methods on this target")); 146 return (*current_cp_abi.method_ptr_to_value) (this_p, method_ptr); 147 } 148 149 int 150 cp_pass_by_reference (struct type *type) 151 { 152 if ((current_cp_abi.pass_by_reference) == NULL) 153 return 0; 154 return (*current_cp_abi.pass_by_reference) (type); 155 } 156 157 /* Set the current C++ ABI to SHORT_NAME. */ 158 159 static int 160 switch_to_cp_abi (const char *short_name) 161 { 162 struct cp_abi_ops *abi; 163 164 abi = find_cp_abi (short_name); 165 if (abi == NULL) 166 return 0; 167 168 current_cp_abi = *abi; 169 return 1; 170 } 171 172 /* Add ABI to the list of supported C++ ABI's. */ 173 174 int 175 register_cp_abi (struct cp_abi_ops *abi) 176 { 177 if (num_cp_abis == CP_ABI_MAX) 178 internal_error (__FILE__, __LINE__, 179 _("Too many C++ ABIs, please increase CP_ABI_MAX in cp-abi.c")); 180 181 cp_abis[num_cp_abis++] = abi; 182 183 return 1; 184 } 185 186 /* Set the ABI to use in "auto" mode to SHORT_NAME. */ 187 188 void 189 set_cp_abi_as_auto_default (const char *short_name) 190 { 191 char *new_longname, *new_doc; 192 struct cp_abi_ops *abi = find_cp_abi (short_name); 193 194 if (abi == NULL) 195 internal_error (__FILE__, __LINE__, 196 _("Cannot find C++ ABI \"%s\" to set it as auto default."), 197 short_name); 198 199 if (auto_cp_abi.longname != NULL) 200 xfree ((char *) auto_cp_abi.longname); 201 if (auto_cp_abi.doc != NULL) 202 xfree ((char *) auto_cp_abi.doc); 203 204 auto_cp_abi = *abi; 205 206 auto_cp_abi.shortname = "auto"; 207 new_longname = xstrprintf ("currently \"%s\"", abi->shortname); 208 auto_cp_abi.longname = new_longname; 209 210 new_doc = xstrprintf ("Automatically selected; currently \"%s\"", 211 abi->shortname); 212 auto_cp_abi.doc = new_doc; 213 214 /* Since we copy the current ABI into current_cp_abi instead of 215 using a pointer, if auto is currently the default, we need to 216 reset it. */ 217 if (strcmp (current_cp_abi.shortname, "auto") == 0) 218 switch_to_cp_abi ("auto"); 219 } 220 221 /* Return the ABI operations associated with SHORT_NAME. */ 222 223 static struct cp_abi_ops * 224 find_cp_abi (const char *short_name) 225 { 226 int i; 227 228 for (i = 0; i < num_cp_abis; i++) 229 if (strcmp (cp_abis[i]->shortname, short_name) == 0) 230 return cp_abis[i]; 231 232 return NULL; 233 } 234 235 /* Display the list of registered C++ ABIs. */ 236 237 static void 238 list_cp_abis (int from_tty) 239 { 240 struct cleanup *cleanup_chain; 241 int i; 242 243 ui_out_text (uiout, "The available C++ ABIs are:\n"); 244 cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "cp-abi-list"); 245 for (i = 0; i < num_cp_abis; i++) 246 { 247 char pad[14]; 248 int padcount; 249 250 ui_out_text (uiout, " "); 251 ui_out_field_string (uiout, "cp-abi", cp_abis[i]->shortname); 252 253 padcount = 16 - 2 - strlen (cp_abis[i]->shortname); 254 pad[padcount] = 0; 255 while (padcount > 0) 256 pad[--padcount] = ' '; 257 ui_out_text (uiout, pad); 258 259 ui_out_field_string (uiout, "doc", cp_abis[i]->doc); 260 ui_out_text (uiout, "\n"); 261 } 262 do_cleanups (cleanup_chain); 263 } 264 265 /* Set the current C++ ABI, or display the list of options if no 266 argument is given. */ 267 268 static void 269 set_cp_abi_cmd (char *args, int from_tty) 270 { 271 if (args == NULL) 272 { 273 list_cp_abis (from_tty); 274 return; 275 } 276 277 if (!switch_to_cp_abi (args)) 278 error (_("Could not find \"%s\" in ABI list"), args); 279 } 280 281 /* Show the currently selected C++ ABI. */ 282 283 static void 284 show_cp_abi_cmd (char *args, int from_tty) 285 { 286 ui_out_text (uiout, "The currently selected C++ ABI is \""); 287 288 ui_out_field_string (uiout, "cp-abi", current_cp_abi.shortname); 289 ui_out_text (uiout, "\" ("); 290 ui_out_field_string (uiout, "longname", current_cp_abi.longname); 291 ui_out_text (uiout, ").\n"); 292 } 293 294 extern initialize_file_ftype _initialize_cp_abi; /* -Wmissing-prototypes */ 295 296 void 297 _initialize_cp_abi (void) 298 { 299 register_cp_abi (&auto_cp_abi); 300 switch_to_cp_abi ("auto"); 301 302 add_cmd ("cp-abi", class_obscure, set_cp_abi_cmd, _("\ 303 Set the ABI used for inspecting C++ objects.\n\ 304 \"set cp-abi\" with no arguments will list the available ABIs."), 305 &setlist); 306 307 add_cmd ("cp-abi", class_obscure, show_cp_abi_cmd, 308 _("Show the ABI used for inspecting C++ objects."), &showlist); 309 } 310