| 1 | /* Generic code for supporting multiple C++ ABI's |
| 2 | |
| 3 | Copyright (C) 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009 |
| 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 | if ((current_cp_abi.rtti_type) == NULL) |
| 96 | return NULL; |
| 97 | TRY_CATCH (e, RETURN_MASK_ERROR) |
| 98 | { |
| 99 | ret = (*current_cp_abi.rtti_type) (v, full, top, using_enc); |
| 100 | } |
| 101 | if (e.reason < 0) |
| 102 | return NULL; |
| 103 | return ret; |
| 104 | } |
| 105 | |
| 106 | void |
| 107 | cplus_print_method_ptr (const gdb_byte *contents, struct type *type, |
| 108 | struct ui_file *stream) |
| 109 | { |
| 110 | if (current_cp_abi.print_method_ptr == NULL) |
| 111 | error (_("GDB does not support pointers to methods on this target")); |
| 112 | (*current_cp_abi.print_method_ptr) (contents, type, stream); |
| 113 | } |
| 114 | |
| 115 | int |
| 116 | cplus_method_ptr_size (struct type *to_type) |
| 117 | { |
| 118 | if (current_cp_abi.method_ptr_size == NULL) |
| 119 | error (_("GDB does not support pointers to methods on this target")); |
| 120 | return (*current_cp_abi.method_ptr_size) (to_type); |
| 121 | } |
| 122 | |
| 123 | void |
| 124 | cplus_make_method_ptr (struct type *type, gdb_byte *contents, |
| 125 | CORE_ADDR value, int is_virtual) |
| 126 | { |
| 127 | if (current_cp_abi.make_method_ptr == NULL) |
| 128 | error (_("GDB does not support pointers to methods on this target")); |
| 129 | (*current_cp_abi.make_method_ptr) (type, contents, value, is_virtual); |
| 130 | } |
| 131 | |
| 132 | CORE_ADDR |
| 133 | cplus_skip_trampoline (struct frame_info *frame, CORE_ADDR stop_pc) |
| 134 | { |
| 135 | if (current_cp_abi.skip_trampoline == NULL) |
| 136 | return 0; |
| 137 | return (*current_cp_abi.skip_trampoline) (frame, stop_pc); |
| 138 | } |
| 139 | |
| 140 | struct value * |
| 141 | cplus_method_ptr_to_value (struct value **this_p, struct value *method_ptr) |
| 142 | { |
| 143 | if (current_cp_abi.method_ptr_to_value == NULL) |
| 144 | error (_("GDB does not support pointers to methods on this target")); |
| 145 | return (*current_cp_abi.method_ptr_to_value) (this_p, method_ptr); |
| 146 | } |
| 147 | |
| 148 | int |
| 149 | cp_pass_by_reference (struct type *type) |
| 150 | { |
| 151 | if ((current_cp_abi.pass_by_reference) == NULL) |
| 152 | return 0; |
| 153 | return (*current_cp_abi.pass_by_reference) (type); |
| 154 | } |
| 155 | |
| 156 | /* Set the current C++ ABI to SHORT_NAME. */ |
| 157 | |
| 158 | static int |
| 159 | switch_to_cp_abi (const char *short_name) |
| 160 | { |
| 161 | struct cp_abi_ops *abi; |
| 162 | |
| 163 | abi = find_cp_abi (short_name); |
| 164 | if (abi == NULL) |
| 165 | return 0; |
| 166 | |
| 167 | current_cp_abi = *abi; |
| 168 | return 1; |
| 169 | } |
| 170 | |
| 171 | /* Add ABI to the list of supported C++ ABI's. */ |
| 172 | |
| 173 | int |
| 174 | register_cp_abi (struct cp_abi_ops *abi) |
| 175 | { |
| 176 | if (num_cp_abis == CP_ABI_MAX) |
| 177 | internal_error (__FILE__, __LINE__, |
| 178 | _("Too many C++ ABIs, please increase CP_ABI_MAX in cp-abi.c")); |
| 179 | |
| 180 | cp_abis[num_cp_abis++] = abi; |
| 181 | |
| 182 | return 1; |
| 183 | } |
| 184 | |
| 185 | /* Set the ABI to use in "auto" mode to SHORT_NAME. */ |
| 186 | |
| 187 | void |
| 188 | set_cp_abi_as_auto_default (const char *short_name) |
| 189 | { |
| 190 | char *new_longname, *new_doc; |
| 191 | struct cp_abi_ops *abi = find_cp_abi (short_name); |
| 192 | |
| 193 | if (abi == NULL) |
| 194 | internal_error (__FILE__, __LINE__, |
| 195 | _("Cannot find C++ ABI \"%s\" to set it as auto default."), |
| 196 | short_name); |
| 197 | |
| 198 | if (auto_cp_abi.longname != NULL) |
| 199 | xfree ((char *) auto_cp_abi.longname); |
| 200 | if (auto_cp_abi.doc != NULL) |
| 201 | xfree ((char *) auto_cp_abi.doc); |
| 202 | |
| 203 | auto_cp_abi = *abi; |
| 204 | |
| 205 | auto_cp_abi.shortname = "auto"; |
| 206 | new_longname = xstrprintf ("currently \"%s\"", abi->shortname); |
| 207 | auto_cp_abi.longname = new_longname; |
| 208 | |
| 209 | new_doc = xstrprintf ("Automatically selected; currently \"%s\"", |
| 210 | abi->shortname); |
| 211 | auto_cp_abi.doc = new_doc; |
| 212 | |
| 213 | /* Since we copy the current ABI into current_cp_abi instead of |
| 214 | using a pointer, if auto is currently the default, we need to |
| 215 | reset it. */ |
| 216 | if (strcmp (current_cp_abi.shortname, "auto") == 0) |
| 217 | switch_to_cp_abi ("auto"); |
| 218 | } |
| 219 | |
| 220 | /* Return the ABI operations associated with SHORT_NAME. */ |
| 221 | |
| 222 | static struct cp_abi_ops * |
| 223 | find_cp_abi (const char *short_name) |
| 224 | { |
| 225 | int i; |
| 226 | |
| 227 | for (i = 0; i < num_cp_abis; i++) |
| 228 | if (strcmp (cp_abis[i]->shortname, short_name) == 0) |
| 229 | return cp_abis[i]; |
| 230 | |
| 231 | return NULL; |
| 232 | } |
| 233 | |
| 234 | /* Display the list of registered C++ ABIs. */ |
| 235 | |
| 236 | static void |
| 237 | list_cp_abis (int from_tty) |
| 238 | { |
| 239 | struct cleanup *cleanup_chain; |
| 240 | int i; |
| 241 | ui_out_text (uiout, "The available C++ ABIs are:\n"); |
| 242 | |
| 243 | cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "cp-abi-list"); |
| 244 | for (i = 0; i < num_cp_abis; i++) |
| 245 | { |
| 246 | char pad[14]; |
| 247 | int padcount; |
| 248 | |
| 249 | ui_out_text (uiout, " "); |
| 250 | ui_out_field_string (uiout, "cp-abi", cp_abis[i]->shortname); |
| 251 | |
| 252 | padcount = 16 - 2 - strlen (cp_abis[i]->shortname); |
| 253 | pad[padcount] = 0; |
| 254 | while (padcount > 0) |
| 255 | pad[--padcount] = ' '; |
| 256 | ui_out_text (uiout, pad); |
| 257 | |
| 258 | ui_out_field_string (uiout, "doc", cp_abis[i]->doc); |
| 259 | ui_out_text (uiout, "\n"); |
| 260 | } |
| 261 | do_cleanups (cleanup_chain); |
| 262 | } |
| 263 | |
| 264 | /* Set the current C++ ABI, or display the list of options if no |
| 265 | argument is given. */ |
| 266 | |
| 267 | static void |
| 268 | set_cp_abi_cmd (char *args, int from_tty) |
| 269 | { |
| 270 | if (args == NULL) |
| 271 | { |
| 272 | list_cp_abis (from_tty); |
| 273 | return; |
| 274 | } |
| 275 | |
| 276 | if (!switch_to_cp_abi (args)) |
| 277 | error (_("Could not find \"%s\" in ABI list"), args); |
| 278 | } |
| 279 | |
| 280 | /* Show the currently selected C++ ABI. */ |
| 281 | |
| 282 | static void |
| 283 | show_cp_abi_cmd (char *args, int from_tty) |
| 284 | { |
| 285 | ui_out_text (uiout, "The currently selected C++ ABI is \""); |
| 286 | |
| 287 | ui_out_field_string (uiout, "cp-abi", current_cp_abi.shortname); |
| 288 | ui_out_text (uiout, "\" ("); |
| 289 | ui_out_field_string (uiout, "longname", current_cp_abi.longname); |
| 290 | ui_out_text (uiout, ").\n"); |
| 291 | } |
| 292 | |
| 293 | extern initialize_file_ftype _initialize_cp_abi; /* -Wmissing-prototypes */ |
| 294 | |
| 295 | void |
| 296 | _initialize_cp_abi (void) |
| 297 | { |
| 298 | register_cp_abi (&auto_cp_abi); |
| 299 | switch_to_cp_abi ("auto"); |
| 300 | |
| 301 | add_cmd ("cp-abi", class_obscure, set_cp_abi_cmd, _("\ |
| 302 | Set the ABI used for inspecting C++ objects.\n\ |
| 303 | \"set cp-abi\" with no arguments will list the available ABIs."), |
| 304 | &setlist); |
| 305 | |
| 306 | add_cmd ("cp-abi", class_obscure, show_cp_abi_cmd, |
| 307 | _("Show the ABI used for inspecting C++ objects."), &showlist); |
| 308 | } |