| 1 | /* Skipping uninteresting files and functions while stepping. |
| 2 | |
| 3 | Copyright (C) 2011-2016 Free Software Foundation, Inc. |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 3 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include "defs.h" |
| 19 | #include "skip.h" |
| 20 | #include "value.h" |
| 21 | #include "valprint.h" |
| 22 | #include "ui-out.h" |
| 23 | #include "symtab.h" |
| 24 | #include "gdbcmd.h" |
| 25 | #include "command.h" |
| 26 | #include "completer.h" |
| 27 | #include "stack.h" |
| 28 | #include "cli/cli-utils.h" |
| 29 | #include "arch-utils.h" |
| 30 | #include "linespec.h" |
| 31 | #include "objfiles.h" |
| 32 | #include "breakpoint.h" /* for get_sal_arch () */ |
| 33 | #include "source.h" |
| 34 | #include "filenames.h" |
| 35 | |
| 36 | struct skiplist_entry |
| 37 | { |
| 38 | int number; |
| 39 | |
| 40 | /* NULL if this isn't a skiplist entry for an entire file. |
| 41 | The skiplist entry owns this pointer. */ |
| 42 | char *filename; |
| 43 | |
| 44 | /* The name of the marked-for-skip function, if this is a skiplist |
| 45 | entry for a function. |
| 46 | The skiplist entry owns this pointer. */ |
| 47 | char *function_name; |
| 48 | |
| 49 | int enabled; |
| 50 | |
| 51 | struct skiplist_entry *next; |
| 52 | }; |
| 53 | |
| 54 | static void add_skiplist_entry (struct skiplist_entry *e); |
| 55 | static void skip_function (const char *name); |
| 56 | |
| 57 | static struct skiplist_entry *skiplist_entry_chain; |
| 58 | static int skiplist_entry_count; |
| 59 | |
| 60 | #define ALL_SKIPLIST_ENTRIES(E) \ |
| 61 | for (E = skiplist_entry_chain; E; E = E->next) |
| 62 | |
| 63 | #define ALL_SKIPLIST_ENTRIES_SAFE(E,TMP) \ |
| 64 | for (E = skiplist_entry_chain; \ |
| 65 | E ? (TMP = E->next, 1) : 0; \ |
| 66 | E = TMP) |
| 67 | |
| 68 | static void |
| 69 | skip_file_command (char *arg, int from_tty) |
| 70 | { |
| 71 | struct skiplist_entry *e; |
| 72 | struct symtab *symtab; |
| 73 | const char *filename = NULL; |
| 74 | |
| 75 | /* If no argument was given, try to default to the last |
| 76 | displayed codepoint. */ |
| 77 | if (arg == NULL) |
| 78 | { |
| 79 | symtab = get_last_displayed_symtab (); |
| 80 | if (symtab == NULL) |
| 81 | error (_("No default file now.")); |
| 82 | |
| 83 | /* It is not a typo, symtab_to_filename_for_display woule be needlessly |
| 84 | ambiguous. */ |
| 85 | filename = symtab_to_fullname (symtab); |
| 86 | } |
| 87 | else |
| 88 | { |
| 89 | symtab = lookup_symtab (arg); |
| 90 | if (symtab == NULL) |
| 91 | { |
| 92 | fprintf_filtered (gdb_stderr, _("No source file named %s.\n"), arg); |
| 93 | if (!nquery (_("\ |
| 94 | Ignore file pending future shared library load? "))) |
| 95 | return; |
| 96 | } |
| 97 | /* Do not use SYMTAB's filename, later loaded shared libraries may match |
| 98 | given ARG but not SYMTAB's filename. */ |
| 99 | filename = arg; |
| 100 | } |
| 101 | |
| 102 | e = XCNEW (struct skiplist_entry); |
| 103 | e->filename = xstrdup (filename); |
| 104 | e->enabled = 1; |
| 105 | |
| 106 | add_skiplist_entry (e); |
| 107 | |
| 108 | printf_filtered (_("File %s will be skipped when stepping.\n"), filename); |
| 109 | } |
| 110 | |
| 111 | static void |
| 112 | skip_function_command (char *arg, int from_tty) |
| 113 | { |
| 114 | const char *name = NULL; |
| 115 | |
| 116 | /* Default to the current function if no argument is given. */ |
| 117 | if (arg == NULL) |
| 118 | { |
| 119 | CORE_ADDR pc; |
| 120 | |
| 121 | if (!last_displayed_sal_is_valid ()) |
| 122 | error (_("No default function now.")); |
| 123 | |
| 124 | pc = get_last_displayed_addr (); |
| 125 | if (!find_pc_partial_function (pc, &name, NULL, NULL)) |
| 126 | { |
| 127 | error (_("No function found containing current program point %s."), |
| 128 | paddress (get_current_arch (), pc)); |
| 129 | } |
| 130 | skip_function (name); |
| 131 | } |
| 132 | else |
| 133 | { |
| 134 | if (lookup_symbol (arg, NULL, VAR_DOMAIN, NULL).symbol == NULL) |
| 135 | { |
| 136 | fprintf_filtered (gdb_stderr, |
| 137 | _("No function found named %s.\n"), arg); |
| 138 | |
| 139 | if (nquery (_("\ |
| 140 | Ignore function pending future shared library load? "))) |
| 141 | { |
| 142 | /* Add the unverified skiplist entry. */ |
| 143 | skip_function (arg); |
| 144 | } |
| 145 | return; |
| 146 | } |
| 147 | |
| 148 | skip_function (arg); |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | static void |
| 153 | skip_info (char *arg, int from_tty) |
| 154 | { |
| 155 | struct skiplist_entry *e; |
| 156 | int num_printable_entries = 0; |
| 157 | struct value_print_options opts; |
| 158 | struct cleanup *tbl_chain; |
| 159 | |
| 160 | get_user_print_options (&opts); |
| 161 | |
| 162 | /* Count the number of rows in the table and see if we need space for a |
| 163 | 64-bit address anywhere. */ |
| 164 | ALL_SKIPLIST_ENTRIES (e) |
| 165 | if (arg == NULL || number_is_in_list (arg, e->number)) |
| 166 | num_printable_entries++; |
| 167 | |
| 168 | if (num_printable_entries == 0) |
| 169 | { |
| 170 | if (arg == NULL) |
| 171 | ui_out_message (current_uiout, 0, _("\ |
| 172 | Not skipping any files or functions.\n")); |
| 173 | else |
| 174 | ui_out_message (current_uiout, 0, |
| 175 | _("No skiplist entries found with number %s.\n"), arg); |
| 176 | |
| 177 | return; |
| 178 | } |
| 179 | |
| 180 | tbl_chain = make_cleanup_ui_out_table_begin_end (current_uiout, 4, |
| 181 | num_printable_entries, |
| 182 | "SkiplistTable"); |
| 183 | |
| 184 | ui_out_table_header (current_uiout, 7, ui_left, "number", "Num"); /* 1 */ |
| 185 | ui_out_table_header (current_uiout, 14, ui_left, "type", "Type"); /* 2 */ |
| 186 | ui_out_table_header (current_uiout, 3, ui_left, "enabled", "Enb"); /* 3 */ |
| 187 | ui_out_table_header (current_uiout, 40, ui_noalign, "what", "What"); /* 4 */ |
| 188 | ui_out_table_body (current_uiout); |
| 189 | |
| 190 | ALL_SKIPLIST_ENTRIES (e) |
| 191 | { |
| 192 | struct cleanup *entry_chain; |
| 193 | |
| 194 | QUIT; |
| 195 | if (arg != NULL && !number_is_in_list (arg, e->number)) |
| 196 | continue; |
| 197 | |
| 198 | entry_chain = make_cleanup_ui_out_tuple_begin_end (current_uiout, |
| 199 | "blklst-entry"); |
| 200 | ui_out_field_int (current_uiout, "number", e->number); /* 1 */ |
| 201 | |
| 202 | if (e->function_name != NULL) |
| 203 | ui_out_field_string (current_uiout, "type", "function"); /* 2 */ |
| 204 | else if (e->filename != NULL) |
| 205 | ui_out_field_string (current_uiout, "type", "file"); /* 2 */ |
| 206 | else |
| 207 | internal_error (__FILE__, __LINE__, _("\ |
| 208 | Skiplist entry should have either a filename or a function name.")); |
| 209 | |
| 210 | if (e->enabled) |
| 211 | ui_out_field_string (current_uiout, "enabled", "y"); /* 3 */ |
| 212 | else |
| 213 | ui_out_field_string (current_uiout, "enabled", "n"); /* 3 */ |
| 214 | |
| 215 | if (e->function_name != NULL) |
| 216 | ui_out_field_string (current_uiout, "what", e->function_name); /* 4 */ |
| 217 | else if (e->filename != NULL) |
| 218 | ui_out_field_string (current_uiout, "what", e->filename); /* 4 */ |
| 219 | |
| 220 | ui_out_text (current_uiout, "\n"); |
| 221 | do_cleanups (entry_chain); |
| 222 | } |
| 223 | |
| 224 | do_cleanups (tbl_chain); |
| 225 | } |
| 226 | |
| 227 | static void |
| 228 | skip_enable_command (char *arg, int from_tty) |
| 229 | { |
| 230 | struct skiplist_entry *e; |
| 231 | int found = 0; |
| 232 | |
| 233 | ALL_SKIPLIST_ENTRIES (e) |
| 234 | if (arg == NULL || number_is_in_list (arg, e->number)) |
| 235 | { |
| 236 | e->enabled = 1; |
| 237 | found = 1; |
| 238 | } |
| 239 | |
| 240 | if (!found) |
| 241 | error (_("No skiplist entries found with number %s."), arg); |
| 242 | } |
| 243 | |
| 244 | static void |
| 245 | skip_disable_command (char *arg, int from_tty) |
| 246 | { |
| 247 | struct skiplist_entry *e; |
| 248 | int found = 0; |
| 249 | |
| 250 | ALL_SKIPLIST_ENTRIES (e) |
| 251 | if (arg == NULL || number_is_in_list (arg, e->number)) |
| 252 | { |
| 253 | e->enabled = 0; |
| 254 | found = 1; |
| 255 | } |
| 256 | |
| 257 | if (!found) |
| 258 | error (_("No skiplist entries found with number %s."), arg); |
| 259 | } |
| 260 | |
| 261 | static void |
| 262 | skip_delete_command (char *arg, int from_tty) |
| 263 | { |
| 264 | struct skiplist_entry *e, *temp, *b_prev; |
| 265 | int found = 0; |
| 266 | |
| 267 | b_prev = 0; |
| 268 | ALL_SKIPLIST_ENTRIES_SAFE (e, temp) |
| 269 | if (arg == NULL || number_is_in_list (arg, e->number)) |
| 270 | { |
| 271 | if (b_prev != NULL) |
| 272 | b_prev->next = e->next; |
| 273 | else |
| 274 | skiplist_entry_chain = e->next; |
| 275 | |
| 276 | xfree (e->function_name); |
| 277 | xfree (e->filename); |
| 278 | xfree (e); |
| 279 | found = 1; |
| 280 | } |
| 281 | else |
| 282 | { |
| 283 | b_prev = e; |
| 284 | } |
| 285 | |
| 286 | if (!found) |
| 287 | error (_("No skiplist entries found with number %s."), arg); |
| 288 | } |
| 289 | |
| 290 | /* Create a skiplist entry for the given function NAME and add it to the |
| 291 | list. */ |
| 292 | |
| 293 | static void |
| 294 | skip_function (const char *name) |
| 295 | { |
| 296 | struct skiplist_entry *e = XCNEW (struct skiplist_entry); |
| 297 | |
| 298 | e->enabled = 1; |
| 299 | e->function_name = xstrdup (name); |
| 300 | |
| 301 | add_skiplist_entry (e); |
| 302 | |
| 303 | printf_filtered (_("Function %s will be skipped when stepping.\n"), name); |
| 304 | } |
| 305 | |
| 306 | /* Add the given skiplist entry to our list, and set the entry's number. */ |
| 307 | |
| 308 | static void |
| 309 | add_skiplist_entry (struct skiplist_entry *e) |
| 310 | { |
| 311 | struct skiplist_entry *e1; |
| 312 | |
| 313 | e->number = ++skiplist_entry_count; |
| 314 | |
| 315 | /* Add to the end of the chain so that the list of |
| 316 | skiplist entries will be in numerical order. */ |
| 317 | |
| 318 | e1 = skiplist_entry_chain; |
| 319 | if (e1 == NULL) |
| 320 | skiplist_entry_chain = e; |
| 321 | else |
| 322 | { |
| 323 | while (e1->next) |
| 324 | e1 = e1->next; |
| 325 | e1->next = e; |
| 326 | } |
| 327 | } |
| 328 | |
| 329 | |
| 330 | /* See skip.h. */ |
| 331 | |
| 332 | int |
| 333 | function_name_is_marked_for_skip (const char *function_name, |
| 334 | const struct symtab_and_line *function_sal) |
| 335 | { |
| 336 | int searched_for_fullname = 0; |
| 337 | const char *fullname = NULL; |
| 338 | struct skiplist_entry *e; |
| 339 | |
| 340 | if (function_name == NULL) |
| 341 | return 0; |
| 342 | |
| 343 | ALL_SKIPLIST_ENTRIES (e) |
| 344 | { |
| 345 | if (!e->enabled) |
| 346 | continue; |
| 347 | |
| 348 | /* Does the pc we're stepping into match e's stored pc? */ |
| 349 | if (e->function_name != NULL |
| 350 | && strcmp_iw (function_name, e->function_name) == 0) |
| 351 | return 1; |
| 352 | |
| 353 | if (e->filename != NULL) |
| 354 | { |
| 355 | /* Check first sole SYMTAB->FILENAME. It does not need to be |
| 356 | a substring of symtab_to_fullname as it may contain "./" etc. */ |
| 357 | if (function_sal->symtab != NULL |
| 358 | && compare_filenames_for_search (function_sal->symtab->filename, |
| 359 | e->filename)) |
| 360 | return 1; |
| 361 | |
| 362 | /* Before we invoke realpath, which can get expensive when many |
| 363 | files are involved, do a quick comparison of the basenames. */ |
| 364 | if (!basenames_may_differ |
| 365 | && (function_sal->symtab == NULL |
| 366 | || filename_cmp (lbasename (function_sal->symtab->filename), |
| 367 | lbasename (e->filename)) != 0)) |
| 368 | continue; |
| 369 | |
| 370 | /* Get the filename corresponding to this FUNCTION_SAL, if we haven't |
| 371 | yet. */ |
| 372 | if (!searched_for_fullname) |
| 373 | { |
| 374 | if (function_sal->symtab != NULL) |
| 375 | fullname = symtab_to_fullname (function_sal->symtab); |
| 376 | searched_for_fullname = 1; |
| 377 | } |
| 378 | if (fullname != NULL |
| 379 | && compare_filenames_for_search (fullname, e->filename)) |
| 380 | return 1; |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | return 0; |
| 385 | } |
| 386 | |
| 387 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 388 | extern initialize_file_ftype _initialize_step_skip; |
| 389 | |
| 390 | void |
| 391 | _initialize_step_skip (void) |
| 392 | { |
| 393 | static struct cmd_list_element *skiplist = NULL; |
| 394 | struct cmd_list_element *c; |
| 395 | |
| 396 | skiplist_entry_chain = 0; |
| 397 | skiplist_entry_count = 0; |
| 398 | |
| 399 | add_prefix_cmd ("skip", class_breakpoint, skip_function_command, _("\ |
| 400 | Ignore a function while stepping.\n\ |
| 401 | Usage: skip [FUNCTION NAME]\n\ |
| 402 | If no function name is given, ignore the current function."), |
| 403 | &skiplist, "skip ", 1, &cmdlist); |
| 404 | |
| 405 | c = add_cmd ("file", class_breakpoint, skip_file_command, _("\ |
| 406 | Ignore a file while stepping.\n\ |
| 407 | Usage: skip file [FILENAME]\n\ |
| 408 | If no filename is given, ignore the current file."), |
| 409 | &skiplist); |
| 410 | set_cmd_completer (c, filename_completer); |
| 411 | |
| 412 | c = add_cmd ("function", class_breakpoint, skip_function_command, _("\ |
| 413 | Ignore a function while stepping.\n\ |
| 414 | Usage: skip function [FUNCTION NAME]\n\ |
| 415 | If no function name is given, skip the current function."), |
| 416 | &skiplist); |
| 417 | set_cmd_completer (c, location_completer); |
| 418 | |
| 419 | add_cmd ("enable", class_breakpoint, skip_enable_command, _("\ |
| 420 | Enable skip entries. You can specify numbers (e.g. \"skip enable 1 3\"), \ |
| 421 | ranges (e.g. \"skip enable 4-8\"), or both (e.g. \"skip enable 1 3 4-8\").\n\n\ |
| 422 | If you don't specify any numbers or ranges, we'll enable all skip entries.\n\n\ |
| 423 | Usage: skip enable [NUMBERS AND/OR RANGES]"), |
| 424 | &skiplist); |
| 425 | |
| 426 | add_cmd ("disable", class_breakpoint, skip_disable_command, _("\ |
| 427 | Disable skip entries. You can specify numbers (e.g. \"skip disable 1 3\"), \ |
| 428 | ranges (e.g. \"skip disable 4-8\"), or both (e.g. \"skip disable 1 3 4-8\").\n\n\ |
| 429 | If you don't specify any numbers or ranges, we'll disable all skip entries.\n\n\ |
| 430 | Usage: skip disable [NUMBERS AND/OR RANGES]"), |
| 431 | &skiplist); |
| 432 | |
| 433 | add_cmd ("delete", class_breakpoint, skip_delete_command, _("\ |
| 434 | Delete skip entries. You can specify numbers (e.g. \"skip delete 1 3\"), \ |
| 435 | ranges (e.g. \"skip delete 4-8\"), or both (e.g. \"skip delete 1 3 4-8\").\n\n\ |
| 436 | If you don't specify any numbers or ranges, we'll delete all skip entries.\n\n\ |
| 437 | Usage: skip delete [NUMBERS AND/OR RANGES]"), |
| 438 | &skiplist); |
| 439 | |
| 440 | add_info ("skip", skip_info, _("\ |
| 441 | Display the status of skips. You can specify numbers (e.g. \"skip info 1 3\"), \ |
| 442 | ranges (e.g. \"skip info 4-8\"), or both (e.g. \"skip info 1 3 4-8\").\n\n\ |
| 443 | If you don't specify any numbers or ranges, we'll show all skips.\n\n\ |
| 444 | Usage: skip info [NUMBERS AND/OR RANGES]\n\ |
| 445 | The \"Type\" column indicates one of:\n\ |
| 446 | \tfile - ignored file\n\ |
| 447 | \tfunction - ignored function")); |
| 448 | } |