| 1 | /* Generic static probe support for GDB. |
| 2 | |
| 3 | Copyright (C) 2012-2016 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "probe.h" |
| 22 | #include "command.h" |
| 23 | #include "cli/cli-cmds.h" |
| 24 | #include "cli/cli-utils.h" |
| 25 | #include "objfiles.h" |
| 26 | #include "symtab.h" |
| 27 | #include "progspace.h" |
| 28 | #include "filenames.h" |
| 29 | #include "linespec.h" |
| 30 | #include "gdb_regex.h" |
| 31 | #include "frame.h" |
| 32 | #include "arch-utils.h" |
| 33 | #include "value.h" |
| 34 | #include "ax.h" |
| 35 | #include "ax-gdb.h" |
| 36 | #include "location.h" |
| 37 | #include <ctype.h> |
| 38 | #include <algorithm> |
| 39 | |
| 40 | typedef struct bound_probe bound_probe_s; |
| 41 | DEF_VEC_O (bound_probe_s); |
| 42 | |
| 43 | \f |
| 44 | |
| 45 | /* A helper for parse_probes that decodes a probe specification in |
| 46 | SEARCH_PSPACE. It appends matching SALs to RESULT. */ |
| 47 | |
| 48 | static void |
| 49 | parse_probes_in_pspace (const struct probe_ops *probe_ops, |
| 50 | struct program_space *search_pspace, |
| 51 | const char *objfile_namestr, |
| 52 | const char *provider, |
| 53 | const char *name, |
| 54 | struct symtabs_and_lines *result) |
| 55 | { |
| 56 | struct objfile *objfile; |
| 57 | |
| 58 | ALL_PSPACE_OBJFILES (search_pspace, objfile) |
| 59 | { |
| 60 | VEC (probe_p) *probes; |
| 61 | struct probe *probe; |
| 62 | int ix; |
| 63 | |
| 64 | if (!objfile->sf || !objfile->sf->sym_probe_fns) |
| 65 | continue; |
| 66 | |
| 67 | if (objfile_namestr |
| 68 | && FILENAME_CMP (objfile_name (objfile), objfile_namestr) != 0 |
| 69 | && FILENAME_CMP (lbasename (objfile_name (objfile)), |
| 70 | objfile_namestr) != 0) |
| 71 | continue; |
| 72 | |
| 73 | probes = objfile->sf->sym_probe_fns->sym_get_probes (objfile); |
| 74 | |
| 75 | for (ix = 0; VEC_iterate (probe_p, probes, ix, probe); ix++) |
| 76 | { |
| 77 | struct symtab_and_line *sal; |
| 78 | |
| 79 | if (probe_ops != &probe_ops_any && probe->pops != probe_ops) |
| 80 | continue; |
| 81 | |
| 82 | if (provider && strcmp (probe->provider, provider) != 0) |
| 83 | continue; |
| 84 | |
| 85 | if (strcmp (probe->name, name) != 0) |
| 86 | continue; |
| 87 | |
| 88 | ++result->nelts; |
| 89 | result->sals = XRESIZEVEC (struct symtab_and_line, result->sals, |
| 90 | result->nelts); |
| 91 | sal = &result->sals[result->nelts - 1]; |
| 92 | |
| 93 | init_sal (sal); |
| 94 | |
| 95 | sal->pc = get_probe_address (probe, objfile); |
| 96 | sal->explicit_pc = 1; |
| 97 | sal->section = find_pc_overlay (sal->pc); |
| 98 | sal->pspace = search_pspace; |
| 99 | sal->probe = probe; |
| 100 | sal->objfile = objfile; |
| 101 | } |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | /* See definition in probe.h. */ |
| 106 | |
| 107 | struct symtabs_and_lines |
| 108 | parse_probes (const struct event_location *location, |
| 109 | struct program_space *search_pspace, |
| 110 | struct linespec_result *canonical) |
| 111 | { |
| 112 | char *arg_end, *arg; |
| 113 | char *objfile_namestr = NULL, *provider = NULL, *name, *p; |
| 114 | struct cleanup *cleanup; |
| 115 | struct symtabs_and_lines result; |
| 116 | const struct probe_ops *probe_ops; |
| 117 | const char *arg_start, *cs; |
| 118 | |
| 119 | result.sals = NULL; |
| 120 | result.nelts = 0; |
| 121 | |
| 122 | gdb_assert (event_location_type (location) == PROBE_LOCATION); |
| 123 | arg_start = get_probe_location (location); |
| 124 | |
| 125 | cs = arg_start; |
| 126 | probe_ops = probe_linespec_to_ops (&cs); |
| 127 | if (probe_ops == NULL) |
| 128 | error (_("'%s' is not a probe linespec"), arg_start); |
| 129 | |
| 130 | arg = (char *) cs; |
| 131 | arg = skip_spaces (arg); |
| 132 | if (!*arg) |
| 133 | error (_("argument to `%s' missing"), arg_start); |
| 134 | |
| 135 | arg_end = skip_to_space (arg); |
| 136 | |
| 137 | /* We make a copy here so we can write over parts with impunity. */ |
| 138 | arg = savestring (arg, arg_end - arg); |
| 139 | cleanup = make_cleanup (xfree, arg); |
| 140 | |
| 141 | /* Extract each word from the argument, separated by ":"s. */ |
| 142 | p = strchr (arg, ':'); |
| 143 | if (p == NULL) |
| 144 | { |
| 145 | /* This is `-p name'. */ |
| 146 | name = arg; |
| 147 | } |
| 148 | else |
| 149 | { |
| 150 | char *hold = p + 1; |
| 151 | |
| 152 | *p = '\0'; |
| 153 | p = strchr (hold, ':'); |
| 154 | if (p == NULL) |
| 155 | { |
| 156 | /* This is `-p provider:name'. */ |
| 157 | provider = arg; |
| 158 | name = hold; |
| 159 | } |
| 160 | else |
| 161 | { |
| 162 | /* This is `-p objfile:provider:name'. */ |
| 163 | *p = '\0'; |
| 164 | objfile_namestr = arg; |
| 165 | provider = hold; |
| 166 | name = p + 1; |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | if (*name == '\0') |
| 171 | error (_("no probe name specified")); |
| 172 | if (provider && *provider == '\0') |
| 173 | error (_("invalid provider name")); |
| 174 | if (objfile_namestr && *objfile_namestr == '\0') |
| 175 | error (_("invalid objfile name")); |
| 176 | |
| 177 | if (search_pspace != NULL) |
| 178 | { |
| 179 | parse_probes_in_pspace (probe_ops, search_pspace, objfile_namestr, |
| 180 | provider, name, &result); |
| 181 | } |
| 182 | else |
| 183 | { |
| 184 | struct program_space *pspace; |
| 185 | |
| 186 | ALL_PSPACES (pspace) |
| 187 | parse_probes_in_pspace (probe_ops, pspace, objfile_namestr, |
| 188 | provider, name, &result); |
| 189 | } |
| 190 | |
| 191 | if (result.nelts == 0) |
| 192 | { |
| 193 | throw_error (NOT_FOUND_ERROR, |
| 194 | _("No probe matching objfile=`%s', provider=`%s', name=`%s'"), |
| 195 | objfile_namestr ? objfile_namestr : _("<any>"), |
| 196 | provider ? provider : _("<any>"), |
| 197 | name); |
| 198 | } |
| 199 | |
| 200 | if (canonical) |
| 201 | { |
| 202 | char *canon; |
| 203 | |
| 204 | canon = savestring (arg_start, arg_end - arg_start); |
| 205 | make_cleanup (xfree, canon); |
| 206 | canonical->special_display = 1; |
| 207 | canonical->pre_expanded = 1; |
| 208 | canonical->location = new_probe_location (canon); |
| 209 | } |
| 210 | |
| 211 | do_cleanups (cleanup); |
| 212 | |
| 213 | return result; |
| 214 | } |
| 215 | |
| 216 | /* See definition in probe.h. */ |
| 217 | |
| 218 | VEC (probe_p) * |
| 219 | find_probes_in_objfile (struct objfile *objfile, const char *provider, |
| 220 | const char *name) |
| 221 | { |
| 222 | VEC (probe_p) *probes, *result = NULL; |
| 223 | int ix; |
| 224 | struct probe *probe; |
| 225 | |
| 226 | if (!objfile->sf || !objfile->sf->sym_probe_fns) |
| 227 | return NULL; |
| 228 | |
| 229 | probes = objfile->sf->sym_probe_fns->sym_get_probes (objfile); |
| 230 | for (ix = 0; VEC_iterate (probe_p, probes, ix, probe); ix++) |
| 231 | { |
| 232 | if (strcmp (probe->provider, provider) != 0) |
| 233 | continue; |
| 234 | |
| 235 | if (strcmp (probe->name, name) != 0) |
| 236 | continue; |
| 237 | |
| 238 | VEC_safe_push (probe_p, result, probe); |
| 239 | } |
| 240 | |
| 241 | return result; |
| 242 | } |
| 243 | |
| 244 | /* See definition in probe.h. */ |
| 245 | |
| 246 | struct bound_probe |
| 247 | find_probe_by_pc (CORE_ADDR pc) |
| 248 | { |
| 249 | struct objfile *objfile; |
| 250 | struct bound_probe result; |
| 251 | |
| 252 | result.objfile = NULL; |
| 253 | result.probe = NULL; |
| 254 | |
| 255 | ALL_OBJFILES (objfile) |
| 256 | { |
| 257 | VEC (probe_p) *probes; |
| 258 | int ix; |
| 259 | struct probe *probe; |
| 260 | |
| 261 | if (!objfile->sf || !objfile->sf->sym_probe_fns |
| 262 | || objfile->sect_index_text == -1) |
| 263 | continue; |
| 264 | |
| 265 | /* If this proves too inefficient, we can replace with a hash. */ |
| 266 | probes = objfile->sf->sym_probe_fns->sym_get_probes (objfile); |
| 267 | for (ix = 0; VEC_iterate (probe_p, probes, ix, probe); ix++) |
| 268 | if (get_probe_address (probe, objfile) == pc) |
| 269 | { |
| 270 | result.objfile = objfile; |
| 271 | result.probe = probe; |
| 272 | return result; |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | return result; |
| 277 | } |
| 278 | |
| 279 | \f |
| 280 | |
| 281 | /* Make a vector of probes matching OBJNAME, PROVIDER, and PROBE_NAME. |
| 282 | If POPS is not NULL, only probes of this certain probe_ops will match. |
| 283 | Each argument is a regexp, or NULL, which matches anything. */ |
| 284 | |
| 285 | static VEC (bound_probe_s) * |
| 286 | collect_probes (char *objname, char *provider, char *probe_name, |
| 287 | const struct probe_ops *pops) |
| 288 | { |
| 289 | struct objfile *objfile; |
| 290 | VEC (bound_probe_s) *result = NULL; |
| 291 | struct cleanup *cleanup, *cleanup_temps; |
| 292 | regex_t obj_pat, prov_pat, probe_pat; |
| 293 | |
| 294 | cleanup = make_cleanup (VEC_cleanup (bound_probe_s), &result); |
| 295 | |
| 296 | cleanup_temps = make_cleanup (null_cleanup, NULL); |
| 297 | if (provider != NULL) |
| 298 | compile_rx_or_error (&prov_pat, provider, _("Invalid provider regexp")); |
| 299 | if (probe_name != NULL) |
| 300 | compile_rx_or_error (&probe_pat, probe_name, _("Invalid probe regexp")); |
| 301 | if (objname != NULL) |
| 302 | compile_rx_or_error (&obj_pat, objname, _("Invalid object file regexp")); |
| 303 | |
| 304 | ALL_OBJFILES (objfile) |
| 305 | { |
| 306 | VEC (probe_p) *probes; |
| 307 | struct probe *probe; |
| 308 | int ix; |
| 309 | |
| 310 | if (! objfile->sf || ! objfile->sf->sym_probe_fns) |
| 311 | continue; |
| 312 | |
| 313 | if (objname) |
| 314 | { |
| 315 | if (regexec (&obj_pat, objfile_name (objfile), 0, NULL, 0) != 0) |
| 316 | continue; |
| 317 | } |
| 318 | |
| 319 | probes = objfile->sf->sym_probe_fns->sym_get_probes (objfile); |
| 320 | |
| 321 | for (ix = 0; VEC_iterate (probe_p, probes, ix, probe); ix++) |
| 322 | { |
| 323 | struct bound_probe bound; |
| 324 | |
| 325 | if (pops != NULL && probe->pops != pops) |
| 326 | continue; |
| 327 | |
| 328 | if (provider |
| 329 | && regexec (&prov_pat, probe->provider, 0, NULL, 0) != 0) |
| 330 | continue; |
| 331 | |
| 332 | if (probe_name |
| 333 | && regexec (&probe_pat, probe->name, 0, NULL, 0) != 0) |
| 334 | continue; |
| 335 | |
| 336 | bound.objfile = objfile; |
| 337 | bound.probe = probe; |
| 338 | VEC_safe_push (bound_probe_s, result, &bound); |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | do_cleanups (cleanup_temps); |
| 343 | discard_cleanups (cleanup); |
| 344 | return result; |
| 345 | } |
| 346 | |
| 347 | /* A qsort comparison function for bound_probe_s objects. */ |
| 348 | |
| 349 | static int |
| 350 | compare_probes (const void *a, const void *b) |
| 351 | { |
| 352 | const struct bound_probe *pa = (const struct bound_probe *) a; |
| 353 | const struct bound_probe *pb = (const struct bound_probe *) b; |
| 354 | int v; |
| 355 | |
| 356 | v = strcmp (pa->probe->provider, pb->probe->provider); |
| 357 | if (v) |
| 358 | return v; |
| 359 | |
| 360 | v = strcmp (pa->probe->name, pb->probe->name); |
| 361 | if (v) |
| 362 | return v; |
| 363 | |
| 364 | if (pa->probe->address < pb->probe->address) |
| 365 | return -1; |
| 366 | if (pa->probe->address > pb->probe->address) |
| 367 | return 1; |
| 368 | |
| 369 | return strcmp (objfile_name (pa->objfile), objfile_name (pb->objfile)); |
| 370 | } |
| 371 | |
| 372 | /* Helper function that generate entries in the ui_out table being |
| 373 | crafted by `info_probes_for_ops'. */ |
| 374 | |
| 375 | static void |
| 376 | gen_ui_out_table_header_info (VEC (bound_probe_s) *probes, |
| 377 | const struct probe_ops *p) |
| 378 | { |
| 379 | /* `headings' refers to the names of the columns when printing `info |
| 380 | probes'. */ |
| 381 | VEC (info_probe_column_s) *headings = NULL; |
| 382 | struct cleanup *c; |
| 383 | info_probe_column_s *column; |
| 384 | size_t headings_size; |
| 385 | int ix; |
| 386 | |
| 387 | gdb_assert (p != NULL); |
| 388 | |
| 389 | if (p->gen_info_probes_table_header == NULL |
| 390 | && p->gen_info_probes_table_values == NULL) |
| 391 | return; |
| 392 | |
| 393 | gdb_assert (p->gen_info_probes_table_header != NULL |
| 394 | && p->gen_info_probes_table_values != NULL); |
| 395 | |
| 396 | c = make_cleanup (VEC_cleanup (info_probe_column_s), &headings); |
| 397 | p->gen_info_probes_table_header (&headings); |
| 398 | |
| 399 | headings_size = VEC_length (info_probe_column_s, headings); |
| 400 | |
| 401 | for (ix = 0; |
| 402 | VEC_iterate (info_probe_column_s, headings, ix, column); |
| 403 | ++ix) |
| 404 | { |
| 405 | struct bound_probe *probe; |
| 406 | int jx; |
| 407 | size_t size_max = strlen (column->print_name); |
| 408 | |
| 409 | for (jx = 0; VEC_iterate (bound_probe_s, probes, jx, probe); ++jx) |
| 410 | { |
| 411 | /* `probe_fields' refers to the values of each new field that this |
| 412 | probe will display. */ |
| 413 | VEC (const_char_ptr) *probe_fields = NULL; |
| 414 | struct cleanup *c2; |
| 415 | const char *val; |
| 416 | int kx; |
| 417 | |
| 418 | if (probe->probe->pops != p) |
| 419 | continue; |
| 420 | |
| 421 | c2 = make_cleanup (VEC_cleanup (const_char_ptr), &probe_fields); |
| 422 | p->gen_info_probes_table_values (probe->probe, &probe_fields); |
| 423 | |
| 424 | gdb_assert (VEC_length (const_char_ptr, probe_fields) |
| 425 | == headings_size); |
| 426 | |
| 427 | for (kx = 0; VEC_iterate (const_char_ptr, probe_fields, kx, val); |
| 428 | ++kx) |
| 429 | { |
| 430 | /* It is valid to have a NULL value here, which means that the |
| 431 | backend does not have something to write and this particular |
| 432 | field should be skipped. */ |
| 433 | if (val == NULL) |
| 434 | continue; |
| 435 | |
| 436 | size_max = std::max (strlen (val), size_max); |
| 437 | } |
| 438 | do_cleanups (c2); |
| 439 | } |
| 440 | |
| 441 | ui_out_table_header (current_uiout, size_max, ui_left, |
| 442 | column->field_name, column->print_name); |
| 443 | } |
| 444 | |
| 445 | do_cleanups (c); |
| 446 | } |
| 447 | |
| 448 | /* Helper function to print not-applicable strings for all the extra |
| 449 | columns defined in a probe_ops. */ |
| 450 | |
| 451 | static void |
| 452 | print_ui_out_not_applicables (const struct probe_ops *pops) |
| 453 | { |
| 454 | struct cleanup *c; |
| 455 | VEC (info_probe_column_s) *headings = NULL; |
| 456 | info_probe_column_s *column; |
| 457 | int ix; |
| 458 | |
| 459 | if (pops->gen_info_probes_table_header == NULL) |
| 460 | return; |
| 461 | |
| 462 | c = make_cleanup (VEC_cleanup (info_probe_column_s), &headings); |
| 463 | pops->gen_info_probes_table_header (&headings); |
| 464 | |
| 465 | for (ix = 0; |
| 466 | VEC_iterate (info_probe_column_s, headings, ix, column); |
| 467 | ++ix) |
| 468 | ui_out_field_string (current_uiout, column->field_name, _("n/a")); |
| 469 | |
| 470 | do_cleanups (c); |
| 471 | } |
| 472 | |
| 473 | /* Helper function to print extra information about a probe and an objfile |
| 474 | represented by PROBE. */ |
| 475 | |
| 476 | static void |
| 477 | print_ui_out_info (struct probe *probe) |
| 478 | { |
| 479 | int ix; |
| 480 | int j = 0; |
| 481 | /* `values' refers to the actual values of each new field in the output |
| 482 | of `info probe'. `headings' refers to the names of each new field. */ |
| 483 | VEC (const_char_ptr) *values = NULL; |
| 484 | VEC (info_probe_column_s) *headings = NULL; |
| 485 | info_probe_column_s *column; |
| 486 | struct cleanup *c; |
| 487 | |
| 488 | gdb_assert (probe != NULL); |
| 489 | gdb_assert (probe->pops != NULL); |
| 490 | |
| 491 | if (probe->pops->gen_info_probes_table_header == NULL |
| 492 | && probe->pops->gen_info_probes_table_values == NULL) |
| 493 | return; |
| 494 | |
| 495 | gdb_assert (probe->pops->gen_info_probes_table_header != NULL |
| 496 | && probe->pops->gen_info_probes_table_values != NULL); |
| 497 | |
| 498 | c = make_cleanup (VEC_cleanup (info_probe_column_s), &headings); |
| 499 | make_cleanup (VEC_cleanup (const_char_ptr), &values); |
| 500 | |
| 501 | probe->pops->gen_info_probes_table_header (&headings); |
| 502 | probe->pops->gen_info_probes_table_values (probe, &values); |
| 503 | |
| 504 | gdb_assert (VEC_length (info_probe_column_s, headings) |
| 505 | == VEC_length (const_char_ptr, values)); |
| 506 | |
| 507 | for (ix = 0; |
| 508 | VEC_iterate (info_probe_column_s, headings, ix, column); |
| 509 | ++ix) |
| 510 | { |
| 511 | const char *val = VEC_index (const_char_ptr, values, j++); |
| 512 | |
| 513 | if (val == NULL) |
| 514 | ui_out_field_skip (current_uiout, column->field_name); |
| 515 | else |
| 516 | ui_out_field_string (current_uiout, column->field_name, val); |
| 517 | } |
| 518 | |
| 519 | do_cleanups (c); |
| 520 | } |
| 521 | |
| 522 | /* Helper function that returns the number of extra fields which POPS will |
| 523 | need. */ |
| 524 | |
| 525 | static int |
| 526 | get_number_extra_fields (const struct probe_ops *pops) |
| 527 | { |
| 528 | VEC (info_probe_column_s) *headings = NULL; |
| 529 | struct cleanup *c; |
| 530 | int n; |
| 531 | |
| 532 | if (pops->gen_info_probes_table_header == NULL) |
| 533 | return 0; |
| 534 | |
| 535 | c = make_cleanup (VEC_cleanup (info_probe_column_s), &headings); |
| 536 | pops->gen_info_probes_table_header (&headings); |
| 537 | |
| 538 | n = VEC_length (info_probe_column_s, headings); |
| 539 | |
| 540 | do_cleanups (c); |
| 541 | |
| 542 | return n; |
| 543 | } |
| 544 | |
| 545 | /* Helper function that returns 1 if there is a probe in PROBES |
| 546 | featuring the given POPS. It returns 0 otherwise. */ |
| 547 | |
| 548 | static int |
| 549 | exists_probe_with_pops (VEC (bound_probe_s) *probes, |
| 550 | const struct probe_ops *pops) |
| 551 | { |
| 552 | struct bound_probe *probe; |
| 553 | int ix; |
| 554 | |
| 555 | for (ix = 0; VEC_iterate (bound_probe_s, probes, ix, probe); ++ix) |
| 556 | if (probe->probe->pops == pops) |
| 557 | return 1; |
| 558 | |
| 559 | return 0; |
| 560 | } |
| 561 | |
| 562 | /* Helper function that parses a probe linespec of the form [PROVIDER |
| 563 | [PROBE [OBJNAME]]] from the provided string STR. */ |
| 564 | |
| 565 | static void |
| 566 | parse_probe_linespec (const char *str, char **provider, |
| 567 | char **probe_name, char **objname) |
| 568 | { |
| 569 | *probe_name = *objname = NULL; |
| 570 | |
| 571 | *provider = extract_arg_const (&str); |
| 572 | if (*provider != NULL) |
| 573 | { |
| 574 | *probe_name = extract_arg_const (&str); |
| 575 | if (*probe_name != NULL) |
| 576 | *objname = extract_arg_const (&str); |
| 577 | } |
| 578 | } |
| 579 | |
| 580 | /* See comment in probe.h. */ |
| 581 | |
| 582 | void |
| 583 | info_probes_for_ops (const char *arg, int from_tty, |
| 584 | const struct probe_ops *pops) |
| 585 | { |
| 586 | char *provider, *probe_name = NULL, *objname = NULL; |
| 587 | struct cleanup *cleanup = make_cleanup (null_cleanup, NULL); |
| 588 | VEC (bound_probe_s) *probes; |
| 589 | int i, any_found; |
| 590 | int ui_out_extra_fields = 0; |
| 591 | size_t size_addr; |
| 592 | size_t size_name = strlen ("Name"); |
| 593 | size_t size_objname = strlen ("Object"); |
| 594 | size_t size_provider = strlen ("Provider"); |
| 595 | size_t size_type = strlen ("Type"); |
| 596 | struct bound_probe *probe; |
| 597 | struct gdbarch *gdbarch = get_current_arch (); |
| 598 | |
| 599 | parse_probe_linespec (arg, &provider, &probe_name, &objname); |
| 600 | make_cleanup (xfree, provider); |
| 601 | make_cleanup (xfree, probe_name); |
| 602 | make_cleanup (xfree, objname); |
| 603 | |
| 604 | probes = collect_probes (objname, provider, probe_name, pops); |
| 605 | make_cleanup (VEC_cleanup (probe_p), &probes); |
| 606 | |
| 607 | if (pops == NULL) |
| 608 | { |
| 609 | const struct probe_ops *po; |
| 610 | int ix; |
| 611 | |
| 612 | /* If the probe_ops is NULL, it means the user has requested a "simple" |
| 613 | `info probes', i.e., she wants to print all information about all |
| 614 | probes. For that, we have to identify how many extra fields we will |
| 615 | need to add in the ui_out table. |
| 616 | |
| 617 | To do that, we iterate over all probe_ops, querying each one about |
| 618 | its extra fields, and incrementing `ui_out_extra_fields' to reflect |
| 619 | that number. But note that we ignore the probe_ops for which no probes |
| 620 | are defined with the given search criteria. */ |
| 621 | |
| 622 | for (ix = 0; VEC_iterate (probe_ops_cp, all_probe_ops, ix, po); ++ix) |
| 623 | if (exists_probe_with_pops (probes, po)) |
| 624 | ui_out_extra_fields += get_number_extra_fields (po); |
| 625 | } |
| 626 | else |
| 627 | ui_out_extra_fields = get_number_extra_fields (pops); |
| 628 | |
| 629 | make_cleanup_ui_out_table_begin_end (current_uiout, |
| 630 | 5 + ui_out_extra_fields, |
| 631 | VEC_length (bound_probe_s, probes), |
| 632 | "StaticProbes"); |
| 633 | |
| 634 | if (!VEC_empty (bound_probe_s, probes)) |
| 635 | qsort (VEC_address (bound_probe_s, probes), |
| 636 | VEC_length (bound_probe_s, probes), |
| 637 | sizeof (bound_probe_s), compare_probes); |
| 638 | |
| 639 | /* What's the size of an address in our architecture? */ |
| 640 | size_addr = gdbarch_addr_bit (gdbarch) == 64 ? 18 : 10; |
| 641 | |
| 642 | /* Determining the maximum size of each field (`type', `provider', |
| 643 | `name' and `objname'). */ |
| 644 | for (i = 0; VEC_iterate (bound_probe_s, probes, i, probe); ++i) |
| 645 | { |
| 646 | const char *probe_type = probe->probe->pops->type_name (probe->probe); |
| 647 | |
| 648 | size_type = std::max (strlen (probe_type), size_type); |
| 649 | size_name = std::max (strlen (probe->probe->name), size_name); |
| 650 | size_provider = std::max (strlen (probe->probe->provider), size_provider); |
| 651 | size_objname = std::max (strlen (objfile_name (probe->objfile)), |
| 652 | size_objname); |
| 653 | } |
| 654 | |
| 655 | ui_out_table_header (current_uiout, size_type, ui_left, "type", _("Type")); |
| 656 | ui_out_table_header (current_uiout, size_provider, ui_left, "provider", |
| 657 | _("Provider")); |
| 658 | ui_out_table_header (current_uiout, size_name, ui_left, "name", _("Name")); |
| 659 | ui_out_table_header (current_uiout, size_addr, ui_left, "addr", _("Where")); |
| 660 | |
| 661 | if (pops == NULL) |
| 662 | { |
| 663 | const struct probe_ops *po; |
| 664 | int ix; |
| 665 | |
| 666 | /* We have to generate the table header for each new probe type |
| 667 | that we will print. Note that this excludes probe types not |
| 668 | having any defined probe with the search criteria. */ |
| 669 | for (ix = 0; VEC_iterate (probe_ops_cp, all_probe_ops, ix, po); ++ix) |
| 670 | if (exists_probe_with_pops (probes, po)) |
| 671 | gen_ui_out_table_header_info (probes, po); |
| 672 | } |
| 673 | else |
| 674 | gen_ui_out_table_header_info (probes, pops); |
| 675 | |
| 676 | ui_out_table_header (current_uiout, size_objname, ui_left, "object", |
| 677 | _("Object")); |
| 678 | ui_out_table_body (current_uiout); |
| 679 | |
| 680 | for (i = 0; VEC_iterate (bound_probe_s, probes, i, probe); ++i) |
| 681 | { |
| 682 | struct cleanup *inner; |
| 683 | const char *probe_type = probe->probe->pops->type_name (probe->probe); |
| 684 | |
| 685 | inner = make_cleanup_ui_out_tuple_begin_end (current_uiout, "probe"); |
| 686 | |
| 687 | ui_out_field_string (current_uiout, "type",probe_type); |
| 688 | ui_out_field_string (current_uiout, "provider", probe->probe->provider); |
| 689 | ui_out_field_string (current_uiout, "name", probe->probe->name); |
| 690 | ui_out_field_core_addr (current_uiout, "addr", |
| 691 | probe->probe->arch, |
| 692 | get_probe_address (probe->probe, probe->objfile)); |
| 693 | |
| 694 | if (pops == NULL) |
| 695 | { |
| 696 | const struct probe_ops *po; |
| 697 | int ix; |
| 698 | |
| 699 | for (ix = 0; VEC_iterate (probe_ops_cp, all_probe_ops, ix, po); |
| 700 | ++ix) |
| 701 | if (probe->probe->pops == po) |
| 702 | print_ui_out_info (probe->probe); |
| 703 | else if (exists_probe_with_pops (probes, po)) |
| 704 | print_ui_out_not_applicables (po); |
| 705 | } |
| 706 | else |
| 707 | print_ui_out_info (probe->probe); |
| 708 | |
| 709 | ui_out_field_string (current_uiout, "object", |
| 710 | objfile_name (probe->objfile)); |
| 711 | ui_out_text (current_uiout, "\n"); |
| 712 | |
| 713 | do_cleanups (inner); |
| 714 | } |
| 715 | |
| 716 | any_found = !VEC_empty (bound_probe_s, probes); |
| 717 | do_cleanups (cleanup); |
| 718 | |
| 719 | if (!any_found) |
| 720 | ui_out_message (current_uiout, _("No probes matched.\n")); |
| 721 | } |
| 722 | |
| 723 | /* Implementation of the `info probes' command. */ |
| 724 | |
| 725 | static void |
| 726 | info_probes_command (char *arg, int from_tty) |
| 727 | { |
| 728 | info_probes_for_ops (arg, from_tty, NULL); |
| 729 | } |
| 730 | |
| 731 | /* Implementation of the `enable probes' command. */ |
| 732 | |
| 733 | static void |
| 734 | enable_probes_command (char *arg, int from_tty) |
| 735 | { |
| 736 | char *provider, *probe_name = NULL, *objname = NULL; |
| 737 | struct cleanup *cleanup = make_cleanup (null_cleanup, NULL); |
| 738 | VEC (bound_probe_s) *probes; |
| 739 | struct bound_probe *probe; |
| 740 | int i; |
| 741 | |
| 742 | parse_probe_linespec ((const char *) arg, &provider, &probe_name, &objname); |
| 743 | make_cleanup (xfree, provider); |
| 744 | make_cleanup (xfree, probe_name); |
| 745 | make_cleanup (xfree, objname); |
| 746 | |
| 747 | probes = collect_probes (objname, provider, probe_name, NULL); |
| 748 | if (VEC_empty (bound_probe_s, probes)) |
| 749 | { |
| 750 | ui_out_message (current_uiout, _("No probes matched.\n")); |
| 751 | do_cleanups (cleanup); |
| 752 | return; |
| 753 | } |
| 754 | |
| 755 | /* Enable the selected probes, provided their backends support the |
| 756 | notion of enabling a probe. */ |
| 757 | for (i = 0; VEC_iterate (bound_probe_s, probes, i, probe); ++i) |
| 758 | { |
| 759 | const struct probe_ops *pops = probe->probe->pops; |
| 760 | |
| 761 | if (pops->enable_probe != NULL) |
| 762 | { |
| 763 | pops->enable_probe (probe->probe); |
| 764 | ui_out_message (current_uiout, |
| 765 | _("Probe %s:%s enabled.\n"), |
| 766 | probe->probe->provider, probe->probe->name); |
| 767 | } |
| 768 | else |
| 769 | ui_out_message (current_uiout, |
| 770 | _("Probe %s:%s cannot be enabled.\n"), |
| 771 | probe->probe->provider, probe->probe->name); |
| 772 | } |
| 773 | |
| 774 | do_cleanups (cleanup); |
| 775 | } |
| 776 | |
| 777 | /* Implementation of the `disable probes' command. */ |
| 778 | |
| 779 | static void |
| 780 | disable_probes_command (char *arg, int from_tty) |
| 781 | { |
| 782 | char *provider, *probe_name = NULL, *objname = NULL; |
| 783 | struct cleanup *cleanup = make_cleanup (null_cleanup, NULL); |
| 784 | VEC (bound_probe_s) *probes; |
| 785 | struct bound_probe *probe; |
| 786 | int i; |
| 787 | |
| 788 | parse_probe_linespec ((const char *) arg, &provider, &probe_name, &objname); |
| 789 | make_cleanup (xfree, provider); |
| 790 | make_cleanup (xfree, probe_name); |
| 791 | make_cleanup (xfree, objname); |
| 792 | |
| 793 | probes = collect_probes (objname, provider, probe_name, NULL /* pops */); |
| 794 | if (VEC_empty (bound_probe_s, probes)) |
| 795 | { |
| 796 | ui_out_message (current_uiout, _("No probes matched.\n")); |
| 797 | do_cleanups (cleanup); |
| 798 | return; |
| 799 | } |
| 800 | |
| 801 | /* Disable the selected probes, provided their backends support the |
| 802 | notion of enabling a probe. */ |
| 803 | for (i = 0; VEC_iterate (bound_probe_s, probes, i, probe); ++i) |
| 804 | { |
| 805 | const struct probe_ops *pops = probe->probe->pops; |
| 806 | |
| 807 | if (pops->disable_probe != NULL) |
| 808 | { |
| 809 | pops->disable_probe (probe->probe); |
| 810 | ui_out_message (current_uiout, |
| 811 | _("Probe %s:%s disabled.\n"), |
| 812 | probe->probe->provider, probe->probe->name); |
| 813 | } |
| 814 | else |
| 815 | ui_out_message (current_uiout, |
| 816 | _("Probe %s:%s cannot be disabled.\n"), |
| 817 | probe->probe->provider, probe->probe->name); |
| 818 | } |
| 819 | |
| 820 | do_cleanups (cleanup); |
| 821 | } |
| 822 | |
| 823 | /* See comments in probe.h. */ |
| 824 | |
| 825 | CORE_ADDR |
| 826 | get_probe_address (struct probe *probe, struct objfile *objfile) |
| 827 | { |
| 828 | return probe->pops->get_probe_address (probe, objfile); |
| 829 | } |
| 830 | |
| 831 | /* See comments in probe.h. */ |
| 832 | |
| 833 | unsigned |
| 834 | get_probe_argument_count (struct probe *probe, struct frame_info *frame) |
| 835 | { |
| 836 | return probe->pops->get_probe_argument_count (probe, frame); |
| 837 | } |
| 838 | |
| 839 | /* See comments in probe.h. */ |
| 840 | |
| 841 | int |
| 842 | can_evaluate_probe_arguments (struct probe *probe) |
| 843 | { |
| 844 | return probe->pops->can_evaluate_probe_arguments (probe); |
| 845 | } |
| 846 | |
| 847 | /* See comments in probe.h. */ |
| 848 | |
| 849 | struct value * |
| 850 | evaluate_probe_argument (struct probe *probe, unsigned n, |
| 851 | struct frame_info *frame) |
| 852 | { |
| 853 | return probe->pops->evaluate_probe_argument (probe, n, frame); |
| 854 | } |
| 855 | |
| 856 | /* See comments in probe.h. */ |
| 857 | |
| 858 | struct value * |
| 859 | probe_safe_evaluate_at_pc (struct frame_info *frame, unsigned n) |
| 860 | { |
| 861 | struct bound_probe probe; |
| 862 | unsigned n_args; |
| 863 | |
| 864 | probe = find_probe_by_pc (get_frame_pc (frame)); |
| 865 | if (!probe.probe) |
| 866 | return NULL; |
| 867 | |
| 868 | n_args = get_probe_argument_count (probe.probe, frame); |
| 869 | if (n >= n_args) |
| 870 | return NULL; |
| 871 | |
| 872 | return evaluate_probe_argument (probe.probe, n, frame); |
| 873 | } |
| 874 | |
| 875 | /* See comment in probe.h. */ |
| 876 | |
| 877 | const struct probe_ops * |
| 878 | probe_linespec_to_ops (const char **linespecp) |
| 879 | { |
| 880 | int ix; |
| 881 | const struct probe_ops *probe_ops; |
| 882 | |
| 883 | for (ix = 0; VEC_iterate (probe_ops_cp, all_probe_ops, ix, probe_ops); ix++) |
| 884 | if (probe_ops->is_linespec (linespecp)) |
| 885 | return probe_ops; |
| 886 | |
| 887 | return NULL; |
| 888 | } |
| 889 | |
| 890 | /* See comment in probe.h. */ |
| 891 | |
| 892 | int |
| 893 | probe_is_linespec_by_keyword (const char **linespecp, const char *const *keywords) |
| 894 | { |
| 895 | const char *s = *linespecp; |
| 896 | const char *const *csp; |
| 897 | |
| 898 | for (csp = keywords; *csp; csp++) |
| 899 | { |
| 900 | const char *keyword = *csp; |
| 901 | size_t len = strlen (keyword); |
| 902 | |
| 903 | if (strncmp (s, keyword, len) == 0 && isspace (s[len])) |
| 904 | { |
| 905 | *linespecp += len + 1; |
| 906 | return 1; |
| 907 | } |
| 908 | } |
| 909 | |
| 910 | return 0; |
| 911 | } |
| 912 | |
| 913 | /* Implementation of `is_linespec' method for `struct probe_ops'. */ |
| 914 | |
| 915 | static int |
| 916 | probe_any_is_linespec (const char **linespecp) |
| 917 | { |
| 918 | static const char *const keywords[] = { "-p", "-probe", NULL }; |
| 919 | |
| 920 | return probe_is_linespec_by_keyword (linespecp, keywords); |
| 921 | } |
| 922 | |
| 923 | /* Dummy method used for `probe_ops_any'. */ |
| 924 | |
| 925 | static void |
| 926 | probe_any_get_probes (VEC (probe_p) **probesp, struct objfile *objfile) |
| 927 | { |
| 928 | /* No probes can be provided by this dummy backend. */ |
| 929 | } |
| 930 | |
| 931 | /* Operations associated with a generic probe. */ |
| 932 | |
| 933 | const struct probe_ops probe_ops_any = |
| 934 | { |
| 935 | probe_any_is_linespec, |
| 936 | probe_any_get_probes, |
| 937 | }; |
| 938 | |
| 939 | /* See comments in probe.h. */ |
| 940 | |
| 941 | struct cmd_list_element ** |
| 942 | info_probes_cmdlist_get (void) |
| 943 | { |
| 944 | static struct cmd_list_element *info_probes_cmdlist; |
| 945 | |
| 946 | if (info_probes_cmdlist == NULL) |
| 947 | add_prefix_cmd ("probes", class_info, info_probes_command, |
| 948 | _("\ |
| 949 | Show available static probes.\n\ |
| 950 | Usage: info probes [all|TYPE [ARGS]]\n\ |
| 951 | TYPE specifies the type of the probe, and can be one of the following:\n\ |
| 952 | - stap\n\ |
| 953 | If you specify TYPE, there may be additional arguments needed by the\n\ |
| 954 | subcommand.\n\ |
| 955 | If you do not specify any argument, or specify `all', then the command\n\ |
| 956 | will show information about all types of probes."), |
| 957 | &info_probes_cmdlist, "info probes ", |
| 958 | 0/*allow-unknown*/, &infolist); |
| 959 | |
| 960 | return &info_probes_cmdlist; |
| 961 | } |
| 962 | |
| 963 | \f |
| 964 | |
| 965 | /* This is called to compute the value of one of the $_probe_arg* |
| 966 | convenience variables. */ |
| 967 | |
| 968 | static struct value * |
| 969 | compute_probe_arg (struct gdbarch *arch, struct internalvar *ivar, |
| 970 | void *data) |
| 971 | { |
| 972 | struct frame_info *frame = get_selected_frame (_("No frame selected")); |
| 973 | CORE_ADDR pc = get_frame_pc (frame); |
| 974 | int sel = (int) (uintptr_t) data; |
| 975 | struct bound_probe pc_probe; |
| 976 | const struct sym_probe_fns *pc_probe_fns; |
| 977 | unsigned n_args; |
| 978 | |
| 979 | /* SEL == -1 means "_probe_argc". */ |
| 980 | gdb_assert (sel >= -1); |
| 981 | |
| 982 | pc_probe = find_probe_by_pc (pc); |
| 983 | if (pc_probe.probe == NULL) |
| 984 | error (_("No probe at PC %s"), core_addr_to_string (pc)); |
| 985 | |
| 986 | n_args = get_probe_argument_count (pc_probe.probe, frame); |
| 987 | if (sel == -1) |
| 988 | return value_from_longest (builtin_type (arch)->builtin_int, n_args); |
| 989 | |
| 990 | if (sel >= n_args) |
| 991 | error (_("Invalid probe argument %d -- probe has %u arguments available"), |
| 992 | sel, n_args); |
| 993 | |
| 994 | return evaluate_probe_argument (pc_probe.probe, sel, frame); |
| 995 | } |
| 996 | |
| 997 | /* This is called to compile one of the $_probe_arg* convenience |
| 998 | variables into an agent expression. */ |
| 999 | |
| 1000 | static void |
| 1001 | compile_probe_arg (struct internalvar *ivar, struct agent_expr *expr, |
| 1002 | struct axs_value *value, void *data) |
| 1003 | { |
| 1004 | CORE_ADDR pc = expr->scope; |
| 1005 | int sel = (int) (uintptr_t) data; |
| 1006 | struct bound_probe pc_probe; |
| 1007 | const struct sym_probe_fns *pc_probe_fns; |
| 1008 | int n_args; |
| 1009 | struct frame_info *frame = get_selected_frame (NULL); |
| 1010 | |
| 1011 | /* SEL == -1 means "_probe_argc". */ |
| 1012 | gdb_assert (sel >= -1); |
| 1013 | |
| 1014 | pc_probe = find_probe_by_pc (pc); |
| 1015 | if (pc_probe.probe == NULL) |
| 1016 | error (_("No probe at PC %s"), core_addr_to_string (pc)); |
| 1017 | |
| 1018 | n_args = get_probe_argument_count (pc_probe.probe, frame); |
| 1019 | |
| 1020 | if (sel == -1) |
| 1021 | { |
| 1022 | value->kind = axs_rvalue; |
| 1023 | value->type = builtin_type (expr->gdbarch)->builtin_int; |
| 1024 | ax_const_l (expr, n_args); |
| 1025 | return; |
| 1026 | } |
| 1027 | |
| 1028 | gdb_assert (sel >= 0); |
| 1029 | if (sel >= n_args) |
| 1030 | error (_("Invalid probe argument %d -- probe has %d arguments available"), |
| 1031 | sel, n_args); |
| 1032 | |
| 1033 | pc_probe.probe->pops->compile_to_ax (pc_probe.probe, expr, value, sel); |
| 1034 | } |
| 1035 | |
| 1036 | static const struct internalvar_funcs probe_funcs = |
| 1037 | { |
| 1038 | compute_probe_arg, |
| 1039 | compile_probe_arg, |
| 1040 | NULL |
| 1041 | }; |
| 1042 | |
| 1043 | |
| 1044 | VEC (probe_ops_cp) *all_probe_ops; |
| 1045 | |
| 1046 | void _initialize_probe (void); |
| 1047 | |
| 1048 | void |
| 1049 | _initialize_probe (void) |
| 1050 | { |
| 1051 | VEC_safe_push (probe_ops_cp, all_probe_ops, &probe_ops_any); |
| 1052 | |
| 1053 | create_internalvar_type_lazy ("_probe_argc", &probe_funcs, |
| 1054 | (void *) (uintptr_t) -1); |
| 1055 | create_internalvar_type_lazy ("_probe_arg0", &probe_funcs, |
| 1056 | (void *) (uintptr_t) 0); |
| 1057 | create_internalvar_type_lazy ("_probe_arg1", &probe_funcs, |
| 1058 | (void *) (uintptr_t) 1); |
| 1059 | create_internalvar_type_lazy ("_probe_arg2", &probe_funcs, |
| 1060 | (void *) (uintptr_t) 2); |
| 1061 | create_internalvar_type_lazy ("_probe_arg3", &probe_funcs, |
| 1062 | (void *) (uintptr_t) 3); |
| 1063 | create_internalvar_type_lazy ("_probe_arg4", &probe_funcs, |
| 1064 | (void *) (uintptr_t) 4); |
| 1065 | create_internalvar_type_lazy ("_probe_arg5", &probe_funcs, |
| 1066 | (void *) (uintptr_t) 5); |
| 1067 | create_internalvar_type_lazy ("_probe_arg6", &probe_funcs, |
| 1068 | (void *) (uintptr_t) 6); |
| 1069 | create_internalvar_type_lazy ("_probe_arg7", &probe_funcs, |
| 1070 | (void *) (uintptr_t) 7); |
| 1071 | create_internalvar_type_lazy ("_probe_arg8", &probe_funcs, |
| 1072 | (void *) (uintptr_t) 8); |
| 1073 | create_internalvar_type_lazy ("_probe_arg9", &probe_funcs, |
| 1074 | (void *) (uintptr_t) 9); |
| 1075 | create_internalvar_type_lazy ("_probe_arg10", &probe_funcs, |
| 1076 | (void *) (uintptr_t) 10); |
| 1077 | create_internalvar_type_lazy ("_probe_arg11", &probe_funcs, |
| 1078 | (void *) (uintptr_t) 11); |
| 1079 | |
| 1080 | add_cmd ("all", class_info, info_probes_command, |
| 1081 | _("\ |
| 1082 | Show information about all type of probes."), |
| 1083 | info_probes_cmdlist_get ()); |
| 1084 | |
| 1085 | add_cmd ("probes", class_breakpoint, enable_probes_command, _("\ |
| 1086 | Enable probes.\n\ |
| 1087 | Usage: enable probes [PROVIDER [NAME [OBJECT]]]\n\ |
| 1088 | Each argument is a regular expression, used to select probes.\n\ |
| 1089 | PROVIDER matches probe provider names.\n\ |
| 1090 | NAME matches the probe names.\n\ |
| 1091 | OBJECT matches the executable or shared library name.\n\ |
| 1092 | If you do not specify any argument then the command will enable\n\ |
| 1093 | all defined probes."), |
| 1094 | &enablelist); |
| 1095 | |
| 1096 | add_cmd ("probes", class_breakpoint, disable_probes_command, _("\ |
| 1097 | Disable probes.\n\ |
| 1098 | Usage: disable probes [PROVIDER [NAME [OBJECT]]]\n\ |
| 1099 | Each argument is a regular expression, used to select probes.\n\ |
| 1100 | PROVIDER matches probe provider names.\n\ |
| 1101 | NAME matches the probe names.\n\ |
| 1102 | OBJECT matches the executable or shared library name.\n\ |
| 1103 | If you do not specify any argument then the command will disable\n\ |
| 1104 | all defined probes."), |
| 1105 | &disablelist); |
| 1106 | |
| 1107 | } |