gitweb.dragonflybsd.org Git - dragonfly.git/blob - contrib/gdb-7/gdb/cli/cli-setshow.c

1 /* Handle set and show GDB commands.

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.

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.

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/>. */

18 #include "defs.h"

19 #include "readline/tilde.h"

20 #include "value.h"

21 #include <ctype.h>

22 #include "arch-utils.h"

23 #include "observer.h"

25 #include "ui-out.h"

27 #include "cli/cli-decode.h"

28 #include "cli/cli-cmds.h"

29 #include "cli/cli-setshow.h"

30 #include "cli/cli-utils.h"

32 /* Return true if the change of command parameter should be notified. */

34 static int

35 notify_command_param_changed_p (int param_changed, struct cmd_list_element *c)

36 {

37 if (param_changed == 0)

38 return 0;

40 if (c->theclass == class_maintenance || c->theclass == class_deprecated

41 || c->theclass == class_obscure)

42 return 0;

44 return 1;

45 }

47 \f

48 static enum auto_boolean

49 parse_auto_binary_operation (const char *arg)

50 {

51 if (arg != NULL && *arg != '\0')

52 {

53 int length = strlen (arg);

55 while (isspace (arg[length - 1]) && length > 0)

56 length--;

57 if (strncmp (arg, "on", length) == 0

58 || strncmp (arg, "1", length) == 0

59 || strncmp (arg, "yes", length) == 0

60 || strncmp (arg, "enable", length) == 0)

61 return AUTO_BOOLEAN_TRUE;

62 else if (strncmp (arg, "off", length) == 0

63 || strncmp (arg, "0", length) == 0

64 || strncmp (arg, "no", length) == 0

65 || strncmp (arg, "disable", length) == 0)

66 return AUTO_BOOLEAN_FALSE;

67 else if (strncmp (arg, "auto", length) == 0

68 || (strncmp (arg, "-1", length) == 0 && length > 1))

69 return AUTO_BOOLEAN_AUTO;

70 }

71 error (_("\"on\", \"off\" or \"auto\" expected."));

72 return AUTO_BOOLEAN_AUTO; /* Pacify GCC. */

73 }

75 /* See cli-setshow.h. */

77 int

78 parse_cli_boolean_value (const char *arg)

79 {

80 int length;

82 if (!arg || !*arg)

83 return 1;

85 length = strlen (arg);

87 while (arg[length - 1] == ' ' || arg[length - 1] == '\t')

88 length--;

90 if (strncmp (arg, "on", length) == 0

91 || strncmp (arg, "1", length) == 0

92 || strncmp (arg, "yes", length) == 0

93 || strncmp (arg, "enable", length) == 0)

94 return 1;

95 else if (strncmp (arg, "off", length) == 0

96 || strncmp (arg, "0", length) == 0

97 || strncmp (arg, "no", length) == 0

98 || strncmp (arg, "disable", length) == 0)

99 return 0;

100 else

101 return -1;

102 }

103 \f

104 void

105 deprecated_show_value_hack (struct ui_file *ignore_file,

106 int ignore_from_tty,

107 struct cmd_list_element *c,

108 const char *value)

109 {

110 /* If there's no command or value, don't try to print it out. */

111 if (c == NULL || value == NULL)

112 return;

113 /* Print doc minus "show" at start. */

114 print_doc_line (gdb_stdout, c->doc + 5);

115 switch (c->var_type)

116 {

117 case var_string:

118 case var_string_noescape:

119 case var_optional_filename:

120 case var_filename:

121 case var_enum:

122 printf_filtered ((" is \"%s\".\n"), value);

123 break;

124 default:

125 printf_filtered ((" is %s.\n"), value);

126 break;

127 }

128 }

129

130 /* Returns true if ARG is "unlimited". */

131

132 static int

133 is_unlimited_literal (const char *arg)

134 {

135 size_t len = sizeof ("unlimited") - 1;

136

137 arg = skip_spaces_const (arg);

138

139 return (strncmp (arg, "unlimited", len) == 0

140 && (isspace (arg[len]) || arg[len] == '\0'));

141 }

142

143

144 /* Do a "set" command. ARG is NULL if no argument, or the

145 text of the argument, and FROM_TTY is nonzero if this command is

146 being entered directly by the user (i.e. these are just like any

147 other command). C is the command list element for the command. */

148

149 void

150 do_set_command (const char *arg, int from_tty, struct cmd_list_element *c)

151 {

152 /* A flag to indicate the option is changed or not. */

153 int option_changed = 0;

154

155 gdb_assert (c->type == set_cmd);

156

157 switch (c->var_type)

158 {

159 case var_string:

160 {

161 char *newobj;

162 const char *p;

163 char *q;

164 int ch;

165

166 if (arg == NULL)

167 arg = "";

168 newobj = (char *) xmalloc (strlen (arg) + 2);

169 p = arg;

170 q = newobj;

171 while ((ch = *p++) != '\000')

172 {

173 if (ch == '\\')

174 {

175 /* \ at end of argument is used after spaces

176 so they won't be lost. */

177 /* This is obsolete now that we no longer strip

178 trailing whitespace and actually, the backslash

179 didn't get here in my test, readline or

180 something did something funky with a backslash

181 right before a newline. */

182 if (*p == 0)

183 break;

184 ch = parse_escape (get_current_arch (), &p);

185 if (ch == 0)

186 break; /* C loses */

187 else if (ch > 0)

188 *q++ = ch;

189 }

190 else

191 *q++ = ch;

192 }

193 #if 0

194 if (*(p - 1) != '\\')

195 *q++ = ' ';

196 #endif

197 *q++ = '\0';

198 newobj = (char *) xrealloc (newobj, q - newobj);

199

200 if (*(char **) c->var == NULL

201 || strcmp (*(char **) c->var, newobj) != 0)

202 {

203 xfree (*(char **) c->var);

204 *(char **) c->var = newobj;

205

206 option_changed = 1;

207 }

208 else

209 xfree (newobj);

210 }

211 break;

212 case var_string_noescape:

213 if (arg == NULL)

214 arg = "";

215

216 if (*(char **) c->var == NULL || strcmp (*(char **) c->var, arg) != 0)

217 {

218 xfree (*(char **) c->var);

219 *(char **) c->var = xstrdup (arg);

220

221 option_changed = 1;

222 }

223 break;

224 case var_filename:

225 if (arg == NULL)

226 error_no_arg (_("filename to set it to."));

227 /* FALLTHROUGH */

228 case var_optional_filename:

229 {

230 char *val = NULL;

231

232 if (arg != NULL)

233 {

234 /* Clear trailing whitespace of filename. */

235 const char *ptr = arg + strlen (arg) - 1;

236 char *copy;

237

238 while (ptr >= arg && (*ptr == ' ' || *ptr == '\t'))

239 ptr--;

240 copy = xstrndup (arg, ptr + 1 - arg);

241

242 val = tilde_expand (copy);

243 xfree (copy);

244 }

245 else

246 val = xstrdup ("");

247

248 if (*(char **) c->var == NULL

249 || strcmp (*(char **) c->var, val) != 0)

250 {

251 xfree (*(char **) c->var);

252 *(char **) c->var = val;

253

254 option_changed = 1;

255 }

256 else

257 xfree (val);

258 }

259 break;

260 case var_boolean:

261 {

262 int val = parse_cli_boolean_value (arg);

263

264 if (val < 0)

265 error (_("\"on\" or \"off\" expected."));

266 if (val != *(int *) c->var)

267 {

268 *(int *) c->var = val;

269

270 option_changed = 1;

271 }

272 }

273 break;

274 case var_auto_boolean:

275 {

276 enum auto_boolean val = parse_auto_binary_operation (arg);

277

278 if (*(enum auto_boolean *) c->var != val)

279 {

280 *(enum auto_boolean *) c->var = val;

281

282 option_changed = 1;

283 }

284 }

285 break;

286 case var_uinteger:

287 case var_zuinteger:

288 {

289 LONGEST val;

290

291 if (arg == NULL)

292 {

293 if (c->var_type == var_uinteger)

294 error_no_arg (_("integer to set it to, or \"unlimited\"."));

295 else

296 error_no_arg (_("integer to set it to."));

297 }

298

299 if (c->var_type == var_uinteger && is_unlimited_literal (arg))

300 val = 0;

301 else

302 val = parse_and_eval_long (arg);

303

304 if (c->var_type == var_uinteger && val == 0)

305 val = UINT_MAX;

306 else if (val < 0

307 /* For var_uinteger, don't let the user set the value

308 to UINT_MAX directly, as that exposes an

309 implementation detail to the user interface. */

310 || (c->var_type == var_uinteger && val >= UINT_MAX)

311 || (c->var_type == var_zuinteger && val > UINT_MAX))

312 error (_("integer %s out of range"), plongest (val));

313

314 if (*(unsigned int *) c->var != val)

315 {

316 *(unsigned int *) c->var = val;

317

318 option_changed = 1;

319 }

320 }

321 break;

322 case var_integer:

323 case var_zinteger:

324 {

325 LONGEST val;

326

327 if (arg == NULL)

328 {

329 if (c->var_type == var_integer)

330 error_no_arg (_("integer to set it to, or \"unlimited\"."));

331 else

332 error_no_arg (_("integer to set it to."));

333 }

334

335 if (c->var_type == var_integer && is_unlimited_literal (arg))

336 val = 0;

337 else

338 val = parse_and_eval_long (arg);

339

340 if (val == 0 && c->var_type == var_integer)

341 val = INT_MAX;

342 else if (val < INT_MIN

343 /* For var_integer, don't let the user set the value

344 to INT_MAX directly, as that exposes an

345 implementation detail to the user interface. */

346 || (c->var_type == var_integer && val >= INT_MAX)

347 || (c->var_type == var_zinteger && val > INT_MAX))

348 error (_("integer %s out of range"), plongest (val));

349

350 if (*(int *) c->var != val)

351 {

352 *(int *) c->var = val;

353

354 option_changed = 1;

355 }

356 break;

357 }

358 case var_enum:

359 {

360 int i;

361 int len;

362 int nmatches;

363 const char *match = NULL;

364 char *p;

365

366 /* If no argument was supplied, print an informative error

367 message. */

368 if (arg == NULL)

369 {

370 char *msg;

371 int msg_len = 0;

372

373 for (i = 0; c->enums[i]; i++)

374 msg_len += strlen (c->enums[i]) + 2;

375

376 msg = xmalloc (msg_len);

377 *msg = '\0';

378 make_cleanup (xfree, msg);

379

380 for (i = 0; c->enums[i]; i++)

381 {

382 if (i != 0)

383 strcat (msg, ", ");

384 strcat (msg, c->enums[i]);

385 }

386 error (_("Requires an argument. Valid arguments are %s."),

387 msg);

388 }

389

390 p = strchr (arg, ' ');

391

392 if (p)

393 len = p - arg;

394 else

395 len = strlen (arg);

396

397 nmatches = 0;

398 for (i = 0; c->enums[i]; i++)

399 if (strncmp (arg, c->enums[i], len) == 0)

400 {

401 if (c->enums[i][len] == '\0')

402 {

403 match = c->enums[i];

404 nmatches = 1;

405 break; /* Exact match. */

406 }

407 else

408 {

409 match = c->enums[i];

410 nmatches++;

411 }

412 }

413

414 if (nmatches <= 0)

415 error (_("Undefined item: \"%s\"."), arg);

416

417 if (nmatches > 1)

418 error (_("Ambiguous item \"%s\"."), arg);

419

420 if (*(const char **) c->var != match)

421 {

422 *(const char **) c->var = match;

423

424 option_changed = 1;

425 }

426 }

427 break;

428 case var_zuinteger_unlimited:

429 {

430 LONGEST val;

431

432 if (arg == NULL)

433 error_no_arg (_("integer to set it to, or \"unlimited\"."));

434

435 if (is_unlimited_literal (arg))

436 val = -1;

437 else

438 val = parse_and_eval_long (arg);

439

440 if (val > INT_MAX)

441 error (_("integer %s out of range"), plongest (val));

442 else if (val < -1)

443 error (_("only -1 is allowed to set as unlimited"));

444

445 if (*(int *) c->var != val)

446 {

447 *(int *) c->var = val;

448 option_changed = 1;

449 }

450 }

451 break;

452 default:

453 error (_("gdb internal error: bad var_type in do_setshow_command"));

454 }

455 c->func (c, NULL, from_tty);

456

457 if (notify_command_param_changed_p (option_changed, c))

458 {

459 char *name, *cp;

460 struct cmd_list_element **cmds;

461 struct cmd_list_element *p;

462 int i;

463 int length = 0;

464

465 /* Compute the whole multi-word command options. If user types command

466 'set foo bar baz on', c->name is 'baz', and GDB can't pass "bar" to

467 command option change notification, because it is confusing. We can

468 trace back through field 'prefix' to compute the whole options,

469 and pass "foo bar baz" to notification. */

470

471 for (i = 0, p = c; p != NULL; i++)

472 {

473 length += strlen (p->name);

474 length++;

475

476 p = p->prefix;

477 }

478 cp = name = xmalloc (length);

479 cmds = xmalloc (sizeof (struct cmd_list_element *) * i);

480

481 /* Track back through filed 'prefix' and cache them in CMDS. */

482 for (i = 0, p = c; p != NULL; i++)

483 {

484 cmds[i] = p;

485 p = p->prefix;

486 }

487

488 /* Don't trigger any observer notification if prefixlist is not

489 setlist. */

490 i--;

491 if (cmds[i]->prefixlist != &setlist)

492 {

493 xfree (cmds);

494 xfree (name);

495

496 return;

497 }

498 /* Traverse them in the reversed order, and copy their names into

499 NAME. */

500 for (i--; i >= 0; i--)

501 {

502 memcpy (cp, cmds[i]->name, strlen (cmds[i]->name));

503 cp += strlen (cmds[i]->name);

504

505 if (i != 0)

506 {

507 cp[0] = ' ';

508 cp++;

509 }

510 }

511 cp[0] = 0;

512

513 xfree (cmds);

514

515 switch (c->var_type)

516 {

517 case var_string:

518 case var_string_noescape:

519 case var_filename:

520 case var_optional_filename:

521 case var_enum:

522 observer_notify_command_param_changed (name, *(char **) c->var);

523 break;

524 case var_boolean:

525 {

526 char *opt = *(int *) c->var ? "on" : "off";

527

528 observer_notify_command_param_changed (name, opt);

529 }

530 break;

531 case var_auto_boolean:

532 {

533 const char *s = auto_boolean_enums[*(enum auto_boolean *) c->var];

534

535 observer_notify_command_param_changed (name, s);

536 }

537 break;

538 case var_uinteger:

539 case var_zuinteger:

540 {

541 char s[64];

542

543 xsnprintf (s, sizeof s, "%u", *(unsigned int *) c->var);

544 observer_notify_command_param_changed (name, s);

545 }

546 break;

547 case var_integer:

548 case var_zinteger:

549 case var_zuinteger_unlimited:

550 {

551 char s[64];

552

553 xsnprintf (s, sizeof s, "%d", *(int *) c->var);

554 observer_notify_command_param_changed (name, s);

555 }

556 break;

557 }

558 xfree (name);

559 }

560 }

561

562 /* Do a "show" command. ARG is NULL if no argument, or the

563 text of the argument, and FROM_TTY is nonzero if this command is

564 being entered directly by the user (i.e. these are just like any

565 other command). C is the command list element for the command. */

566

567 void

568 do_show_command (const char *arg, int from_tty, struct cmd_list_element *c)

569 {

570 struct ui_out *uiout = current_uiout;

571 struct cleanup *old_chain;

572 struct ui_file *stb;

573

574 gdb_assert (c->type == show_cmd);

575

576 stb = mem_fileopen ();

577 old_chain = make_cleanup_ui_file_delete (stb);

578

579 /* Possibly call the pre hook. */

580 if (c->pre_show_hook)

581 (c->pre_show_hook) (c);

582

583 switch (c->var_type)

584 {

585 case var_string:

586 if (*(char **) c->var)

587 fputstr_filtered (*(char **) c->var, '"', stb);

588 break;

589 case var_string_noescape:

590 case var_optional_filename:

591 case var_filename:

592 case var_enum:

593 if (*(char **) c->var)

594 fputs_filtered (*(char **) c->var, stb);

595 break;

596 case var_boolean:

597 fputs_filtered (*(int *) c->var ? "on" : "off", stb);

598 break;

599 case var_auto_boolean:

600 switch (*(enum auto_boolean*) c->var)

601 {

602 case AUTO_BOOLEAN_TRUE:

603 fputs_filtered ("on", stb);

604 break;

605 case AUTO_BOOLEAN_FALSE:

606 fputs_filtered ("off", stb);

607 break;

608 case AUTO_BOOLEAN_AUTO:

609 fputs_filtered ("auto", stb);

610 break;

611 default:

612 internal_error (__FILE__, __LINE__,

613 _("do_show_command: "

614 "invalid var_auto_boolean"));

615 break;

616 }

617 break;

618 case var_uinteger:

619 case var_zuinteger:

620 if (c->var_type == var_uinteger

621 && *(unsigned int *) c->var == UINT_MAX)

622 fputs_filtered ("unlimited", stb);

623 else

624 fprintf_filtered (stb, "%u", *(unsigned int *) c->var);

625 break;

626 case var_integer:

627 case var_zinteger:

628 if (c->var_type == var_integer

629 && *(int *) c->var == INT_MAX)

630 fputs_filtered ("unlimited", stb);

631 else

632 fprintf_filtered (stb, "%d", *(int *) c->var);

633 break;

634 case var_zuinteger_unlimited:

635 {

636 if (*(int *) c->var == -1)

637 fputs_filtered ("unlimited", stb);

638 else

639 fprintf_filtered (stb, "%d", *(int *) c->var);

640 }

641 break;

642 default:

643 error (_("gdb internal error: bad var_type in do_show_command"));

644 }

645

646

647 /* FIXME: cagney/2005-02-10: Need to split this in half: code to

648 convert the value into a string (esentially the above); and

649 code to print the value out. For the latter there should be

650 MI and CLI specific versions. */

651

652 if (ui_out_is_mi_like_p (uiout))

653 ui_out_field_stream (uiout, "value", stb);

654 else

655 {

656 char *value = ui_file_xstrdup (stb, NULL);

657

658 make_cleanup (xfree, value);

659 if (c->show_value_func != NULL)

660 c->show_value_func (gdb_stdout, from_tty, c, value);

661 else

662 deprecated_show_value_hack (gdb_stdout, from_tty, c, value);

663 }

664 do_cleanups (old_chain);

665

666 c->func (c, NULL, from_tty);

667 }

668

669 /* Show all the settings in a list of show commands. */

670

671 void

672 cmd_show_list (struct cmd_list_element *list, int from_tty, const char *prefix)

673 {

674 struct cleanup *showlist_chain;

675 struct ui_out *uiout = current_uiout;

676

677 showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist");

678 for (; list != NULL; list = list->next)

679 {

680 /* If we find a prefix, run its list, prefixing our output by its

681 prefix (with "show " skipped). */

682 if (list->prefixlist && !list->abbrev_flag)

683 {

684 struct cleanup *optionlist_chain

685 = make_cleanup_ui_out_tuple_begin_end (uiout, "optionlist");

686 char *new_prefix = strstr (list->prefixname, "show ") + 5;

687

688 if (ui_out_is_mi_like_p (uiout))

689 ui_out_field_string (uiout, "prefix", new_prefix);

690 cmd_show_list (*list->prefixlist, from_tty, new_prefix);

691 /* Close the tuple. */

692 do_cleanups (optionlist_chain);

693 }

694 else

695 {

696 if (list->theclass != no_set_class)

697 {

698 struct cleanup *option_chain

699 = make_cleanup_ui_out_tuple_begin_end (uiout, "option");

700

701 ui_out_text (uiout, prefix);

702 ui_out_field_string (uiout, "name", list->name);

703 ui_out_text (uiout, ": ");

704 if (list->type == show_cmd)

705 do_show_command ((char *) NULL, from_tty, list);

706 else

707 cmd_func (list, NULL, from_tty);

708 /* Close the tuple. */

709 do_cleanups (option_chain);

710 }

711 }

712 }

713 /* Close the tuple. */

714 do_cleanups (showlist_chain);

715 }

716