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1 | /* General utility routines for GDB, the GNU debugger. | |
2 | ||
3 | Copyright (C) 1986-2021 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 <ctype.h> | |
22 | #include "gdbsupport/gdb_wait.h" | |
23 | #include "event-top.h" | |
24 | #include "gdbthread.h" | |
25 | #include "fnmatch.h" | |
26 | #include "gdb_bfd.h" | |
27 | #ifdef HAVE_SYS_RESOURCE_H | |
28 | #include <sys/resource.h> | |
29 | #endif /* HAVE_SYS_RESOURCE_H */ | |
30 | ||
31 | #ifdef TUI | |
32 | #include "tui/tui.h" /* For tui_get_command_dimension. */ | |
33 | #endif | |
34 | ||
35 | #ifdef __GO32__ | |
36 | #include <pc.h> | |
37 | #endif | |
38 | ||
39 | #include <signal.h> | |
40 | #include "gdbcmd.h" | |
41 | #include "serial.h" | |
42 | #include "bfd.h" | |
43 | #include "target.h" | |
44 | #include "gdb-demangle.h" | |
45 | #include "expression.h" | |
46 | #include "language.h" | |
47 | #include "charset.h" | |
48 | #include "annotate.h" | |
49 | #include "filenames.h" | |
50 | #include "symfile.h" | |
51 | #include "gdb_obstack.h" | |
52 | #include "gdbcore.h" | |
53 | #include "top.h" | |
54 | #include "main.h" | |
55 | #include "solist.h" | |
56 | ||
57 | #include "inferior.h" /* for signed_pointer_to_address */ | |
58 | ||
59 | #include "gdb_curses.h" | |
60 | ||
61 | #include "readline/readline.h" | |
62 | ||
63 | #include <chrono> | |
64 | ||
65 | #include "interps.h" | |
66 | #include "gdb_regex.h" | |
67 | #include "gdbsupport/job-control.h" | |
68 | #include "gdbsupport/selftest.h" | |
69 | #include "gdbsupport/gdb_optional.h" | |
70 | #include "cp-support.h" | |
71 | #include <algorithm> | |
72 | #include "gdbsupport/pathstuff.h" | |
73 | #include "cli/cli-style.h" | |
74 | #include "gdbsupport/scope-exit.h" | |
75 | #include "gdbarch.h" | |
76 | #include "cli-out.h" | |
77 | #include "gdbsupport/gdb-safe-ctype.h" | |
78 | #include "bt-utils.h" | |
79 | ||
80 | void (*deprecated_error_begin_hook) (void); | |
81 | ||
82 | /* Prototypes for local functions */ | |
83 | ||
84 | static void vfprintf_maybe_filtered (struct ui_file *, const char *, | |
85 | va_list, bool) | |
86 | ATTRIBUTE_PRINTF (2, 0); | |
87 | ||
88 | static void fputs_maybe_filtered (const char *, struct ui_file *, int); | |
89 | ||
90 | static void prompt_for_continue (void); | |
91 | ||
92 | static void set_screen_size (void); | |
93 | static void set_width (void); | |
94 | ||
95 | /* Time spent in prompt_for_continue in the currently executing command | |
96 | waiting for user to respond. | |
97 | Initialized in make_command_stats_cleanup. | |
98 | Modified in prompt_for_continue and defaulted_query. | |
99 | Used in report_command_stats. */ | |
100 | ||
101 | static std::chrono::steady_clock::duration prompt_for_continue_wait_time; | |
102 | ||
103 | /* A flag indicating whether to timestamp debugging messages. */ | |
104 | ||
105 | static bool debug_timestamp = false; | |
106 | ||
107 | /* True means that strings with character values >0x7F should be printed | |
108 | as octal escapes. False means just print the value (e.g. it's an | |
109 | international character, and the terminal or window can cope.) */ | |
110 | ||
111 | bool sevenbit_strings = false; | |
112 | static void | |
113 | show_sevenbit_strings (struct ui_file *file, int from_tty, | |
114 | struct cmd_list_element *c, const char *value) | |
115 | { | |
116 | fprintf_filtered (file, _("Printing of 8-bit characters " | |
117 | "in strings as \\nnn is %s.\n"), | |
118 | value); | |
119 | } | |
120 | ||
121 | /* String to be printed before warning messages, if any. */ | |
122 | ||
123 | const char *warning_pre_print = "\nwarning: "; | |
124 | ||
125 | bool pagination_enabled = true; | |
126 | static void | |
127 | show_pagination_enabled (struct ui_file *file, int from_tty, | |
128 | struct cmd_list_element *c, const char *value) | |
129 | { | |
130 | fprintf_filtered (file, _("State of pagination is %s.\n"), value); | |
131 | } | |
132 | ||
133 | \f | |
134 | ||
135 | ||
136 | /* Print a warning message. The first argument STRING is the warning | |
137 | message, used as an fprintf format string, the second is the | |
138 | va_list of arguments for that string. A warning is unfiltered (not | |
139 | paginated) so that the user does not need to page through each | |
140 | screen full of warnings when there are lots of them. */ | |
141 | ||
142 | void | |
143 | vwarning (const char *string, va_list args) | |
144 | { | |
145 | if (deprecated_warning_hook) | |
146 | (*deprecated_warning_hook) (string, args); | |
147 | else | |
148 | { | |
149 | gdb::optional<target_terminal::scoped_restore_terminal_state> term_state; | |
150 | if (target_supports_terminal_ours ()) | |
151 | { | |
152 | term_state.emplace (); | |
153 | target_terminal::ours_for_output (); | |
154 | } | |
155 | if (filtered_printing_initialized ()) | |
156 | wrap_here (""); /* Force out any buffered output. */ | |
157 | gdb_flush (gdb_stdout); | |
158 | if (warning_pre_print) | |
159 | fputs_unfiltered (warning_pre_print, gdb_stderr); | |
160 | vfprintf_unfiltered (gdb_stderr, string, args); | |
161 | fprintf_unfiltered (gdb_stderr, "\n"); | |
162 | } | |
163 | } | |
164 | ||
165 | /* Print an error message and return to command level. | |
166 | The first argument STRING is the error message, used as a fprintf string, | |
167 | and the remaining args are passed as arguments to it. */ | |
168 | ||
169 | void | |
170 | verror (const char *string, va_list args) | |
171 | { | |
172 | throw_verror (GENERIC_ERROR, string, args); | |
173 | } | |
174 | ||
175 | void | |
176 | error_stream (const string_file &stream) | |
177 | { | |
178 | error (("%s"), stream.c_str ()); | |
179 | } | |
180 | ||
181 | /* Emit a message and abort. */ | |
182 | ||
183 | static void ATTRIBUTE_NORETURN | |
184 | abort_with_message (const char *msg) | |
185 | { | |
186 | if (current_ui == NULL) | |
187 | fputs (msg, stderr); | |
188 | else | |
189 | fputs_unfiltered (msg, gdb_stderr); | |
190 | ||
191 | abort (); /* ARI: abort */ | |
192 | } | |
193 | ||
194 | /* Dump core trying to increase the core soft limit to hard limit first. */ | |
195 | ||
196 | void | |
197 | dump_core (void) | |
198 | { | |
199 | #ifdef HAVE_SETRLIMIT | |
200 | struct rlimit rlim = { (rlim_t) RLIM_INFINITY, (rlim_t) RLIM_INFINITY }; | |
201 | ||
202 | setrlimit (RLIMIT_CORE, &rlim); | |
203 | #endif /* HAVE_SETRLIMIT */ | |
204 | ||
205 | /* Ensure that the SIGABRT we're about to raise will immediately cause | |
206 | GDB to exit and dump core, we don't want to trigger GDB's printing of | |
207 | a backtrace to the console here. */ | |
208 | signal (SIGABRT, SIG_DFL); | |
209 | ||
210 | abort (); /* ARI: abort */ | |
211 | } | |
212 | ||
213 | /* Check whether GDB will be able to dump core using the dump_core | |
214 | function. Returns zero if GDB cannot or should not dump core. | |
215 | If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected. | |
216 | If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */ | |
217 | ||
218 | int | |
219 | can_dump_core (enum resource_limit_kind limit_kind) | |
220 | { | |
221 | #ifdef HAVE_GETRLIMIT | |
222 | struct rlimit rlim; | |
223 | ||
224 | /* Be quiet and assume we can dump if an error is returned. */ | |
225 | if (getrlimit (RLIMIT_CORE, &rlim) != 0) | |
226 | return 1; | |
227 | ||
228 | switch (limit_kind) | |
229 | { | |
230 | case LIMIT_CUR: | |
231 | if (rlim.rlim_cur == 0) | |
232 | return 0; | |
233 | /* Fall through. */ | |
234 | ||
235 | case LIMIT_MAX: | |
236 | if (rlim.rlim_max == 0) | |
237 | return 0; | |
238 | } | |
239 | #endif /* HAVE_GETRLIMIT */ | |
240 | ||
241 | return 1; | |
242 | } | |
243 | ||
244 | /* Print a warning that we cannot dump core. */ | |
245 | ||
246 | void | |
247 | warn_cant_dump_core (const char *reason) | |
248 | { | |
249 | fprintf_unfiltered (gdb_stderr, | |
250 | _("%s\nUnable to dump core, use `ulimit -c" | |
251 | " unlimited' before executing GDB next time.\n"), | |
252 | reason); | |
253 | } | |
254 | ||
255 | /* Check whether GDB will be able to dump core using the dump_core | |
256 | function, and print a warning if we cannot. */ | |
257 | ||
258 | static int | |
259 | can_dump_core_warn (enum resource_limit_kind limit_kind, | |
260 | const char *reason) | |
261 | { | |
262 | int core_dump_allowed = can_dump_core (limit_kind); | |
263 | ||
264 | if (!core_dump_allowed) | |
265 | warn_cant_dump_core (reason); | |
266 | ||
267 | return core_dump_allowed; | |
268 | } | |
269 | ||
270 | /* Allow the user to configure the debugger behavior with respect to | |
271 | what to do when an internal problem is detected. */ | |
272 | ||
273 | const char internal_problem_ask[] = "ask"; | |
274 | const char internal_problem_yes[] = "yes"; | |
275 | const char internal_problem_no[] = "no"; | |
276 | static const char *const internal_problem_modes[] = | |
277 | { | |
278 | internal_problem_ask, | |
279 | internal_problem_yes, | |
280 | internal_problem_no, | |
281 | NULL | |
282 | }; | |
283 | ||
284 | /* Data structure used to control how the internal_vproblem function | |
285 | should behave. An instance of this structure is created for each | |
286 | problem type that GDB supports. */ | |
287 | ||
288 | struct internal_problem | |
289 | { | |
290 | /* The name of this problem type. This must not contain white space as | |
291 | this string is used to build command names. */ | |
292 | const char *name; | |
293 | ||
294 | /* When this is true then a user command is created (based on NAME) that | |
295 | allows the SHOULD_QUIT field to be modified, otherwise, SHOULD_QUIT | |
296 | can't be changed from its default value by the user. */ | |
297 | bool user_settable_should_quit; | |
298 | ||
299 | /* Reference a value from internal_problem_modes to indicate if GDB | |
300 | should quit when it hits a problem of this type. */ | |
301 | const char *should_quit; | |
302 | ||
303 | /* Like USER_SETTABLE_SHOULD_QUIT but for SHOULD_DUMP_CORE. */ | |
304 | bool user_settable_should_dump_core; | |
305 | ||
306 | /* Like SHOULD_QUIT, but whether GDB should dump core. */ | |
307 | const char *should_dump_core; | |
308 | ||
309 | /* Like USER_SETTABLE_SHOULD_QUIT but for SHOULD_PRINT_BACKTRACE. */ | |
310 | bool user_settable_should_print_backtrace; | |
311 | ||
312 | /* When this is true GDB will print a backtrace when a problem of this | |
313 | type is encountered. */ | |
314 | bool should_print_backtrace; | |
315 | }; | |
316 | ||
317 | /* Report a problem, internal to GDB, to the user. Once the problem | |
318 | has been reported, and assuming GDB didn't quit, the caller can | |
319 | either allow execution to resume or throw an error. */ | |
320 | ||
321 | static void ATTRIBUTE_PRINTF (4, 0) | |
322 | internal_vproblem (struct internal_problem *problem, | |
323 | const char *file, int line, const char *fmt, va_list ap) | |
324 | { | |
325 | static int dejavu; | |
326 | int quit_p; | |
327 | int dump_core_p; | |
328 | std::string reason; | |
329 | ||
330 | /* Don't allow infinite error/warning recursion. */ | |
331 | { | |
332 | static const char msg[] = "Recursive internal problem.\n"; | |
333 | ||
334 | switch (dejavu) | |
335 | { | |
336 | case 0: | |
337 | dejavu = 1; | |
338 | break; | |
339 | case 1: | |
340 | dejavu = 2; | |
341 | abort_with_message (msg); | |
342 | default: | |
343 | dejavu = 3; | |
344 | /* Newer GLIBC versions put the warn_unused_result attribute | |
345 | on write, but this is one of those rare cases where | |
346 | ignoring the return value is correct. Casting to (void) | |
347 | does not fix this problem. This is the solution suggested | |
348 | at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509. */ | |
349 | if (write (STDERR_FILENO, msg, sizeof (msg)) != sizeof (msg)) | |
350 | abort (); /* ARI: abort */ | |
351 | exit (1); | |
352 | } | |
353 | } | |
354 | ||
355 | /* Create a string containing the full error/warning message. Need | |
356 | to call query with this full string, as otherwize the reason | |
357 | (error/warning) and question become separated. Format using a | |
358 | style similar to a compiler error message. Include extra detail | |
359 | so that the user knows that they are living on the edge. */ | |
360 | { | |
361 | std::string msg = string_vprintf (fmt, ap); | |
362 | reason = string_printf ("%s:%d: %s: %s\n" | |
363 | "A problem internal to GDB has been detected,\n" | |
364 | "further debugging may prove unreliable.", | |
365 | file, line, problem->name, msg.c_str ()); | |
366 | } | |
367 | ||
368 | /* Fall back to abort_with_message if gdb_stderr is not set up. */ | |
369 | if (current_ui == NULL) | |
370 | { | |
371 | fputs (reason.c_str (), stderr); | |
372 | abort_with_message ("\n"); | |
373 | } | |
374 | ||
375 | /* Try to get the message out and at the start of a new line. */ | |
376 | gdb::optional<target_terminal::scoped_restore_terminal_state> term_state; | |
377 | if (target_supports_terminal_ours ()) | |
378 | { | |
379 | term_state.emplace (); | |
380 | target_terminal::ours_for_output (); | |
381 | } | |
382 | if (filtered_printing_initialized ()) | |
383 | begin_line (); | |
384 | ||
385 | /* Emit the message unless query will emit it below. */ | |
386 | if (problem->should_quit != internal_problem_ask | |
387 | || !confirm | |
388 | || !filtered_printing_initialized () | |
389 | || problem->should_print_backtrace) | |
390 | fprintf_unfiltered (gdb_stderr, "%s\n", reason.c_str ()); | |
391 | ||
392 | if (problem->should_print_backtrace) | |
393 | gdb_internal_backtrace (); | |
394 | ||
395 | if (problem->should_quit == internal_problem_ask) | |
396 | { | |
397 | /* Default (yes/batch case) is to quit GDB. When in batch mode | |
398 | this lessens the likelihood of GDB going into an infinite | |
399 | loop. */ | |
400 | if (!confirm || !filtered_printing_initialized ()) | |
401 | quit_p = 1; | |
402 | else | |
403 | quit_p = query (_("%s\nQuit this debugging session? "), | |
404 | reason.c_str ()); | |
405 | } | |
406 | else if (problem->should_quit == internal_problem_yes) | |
407 | quit_p = 1; | |
408 | else if (problem->should_quit == internal_problem_no) | |
409 | quit_p = 0; | |
410 | else | |
411 | internal_error (__FILE__, __LINE__, _("bad switch")); | |
412 | ||
413 | fputs_unfiltered (_("\nThis is a bug, please report it."), gdb_stderr); | |
414 | if (REPORT_BUGS_TO[0]) | |
415 | fprintf_unfiltered (gdb_stderr, _(" For instructions, see:\n%s."), | |
416 | REPORT_BUGS_TO); | |
417 | fputs_unfiltered ("\n\n", gdb_stderr); | |
418 | ||
419 | if (problem->should_dump_core == internal_problem_ask) | |
420 | { | |
421 | if (!can_dump_core_warn (LIMIT_MAX, reason.c_str ())) | |
422 | dump_core_p = 0; | |
423 | else if (!filtered_printing_initialized ()) | |
424 | dump_core_p = 1; | |
425 | else | |
426 | { | |
427 | /* Default (yes/batch case) is to dump core. This leaves a GDB | |
428 | `dropping' so that it is easier to see that something went | |
429 | wrong in GDB. */ | |
430 | dump_core_p = query (_("%s\nCreate a core file of GDB? "), | |
431 | reason.c_str ()); | |
432 | } | |
433 | } | |
434 | else if (problem->should_dump_core == internal_problem_yes) | |
435 | dump_core_p = can_dump_core_warn (LIMIT_MAX, reason.c_str ()); | |
436 | else if (problem->should_dump_core == internal_problem_no) | |
437 | dump_core_p = 0; | |
438 | else | |
439 | internal_error (__FILE__, __LINE__, _("bad switch")); | |
440 | ||
441 | if (quit_p) | |
442 | { | |
443 | if (dump_core_p) | |
444 | dump_core (); | |
445 | else | |
446 | exit (1); | |
447 | } | |
448 | else | |
449 | { | |
450 | if (dump_core_p) | |
451 | { | |
452 | #ifdef HAVE_WORKING_FORK | |
453 | if (fork () == 0) | |
454 | dump_core (); | |
455 | #endif | |
456 | } | |
457 | } | |
458 | ||
459 | dejavu = 0; | |
460 | } | |
461 | ||
462 | static struct internal_problem internal_error_problem = { | |
463 | "internal-error", true, internal_problem_ask, true, internal_problem_ask, | |
464 | true, GDB_PRINT_INTERNAL_BACKTRACE_INIT_ON | |
465 | }; | |
466 | ||
467 | void | |
468 | internal_verror (const char *file, int line, const char *fmt, va_list ap) | |
469 | { | |
470 | internal_vproblem (&internal_error_problem, file, line, fmt, ap); | |
471 | throw_quit (_("Command aborted.")); | |
472 | } | |
473 | ||
474 | static struct internal_problem internal_warning_problem = { | |
475 | "internal-warning", true, internal_problem_ask, true, internal_problem_ask, | |
476 | true, false | |
477 | }; | |
478 | ||
479 | void | |
480 | internal_vwarning (const char *file, int line, const char *fmt, va_list ap) | |
481 | { | |
482 | internal_vproblem (&internal_warning_problem, file, line, fmt, ap); | |
483 | } | |
484 | ||
485 | static struct internal_problem demangler_warning_problem = { | |
486 | "demangler-warning", true, internal_problem_ask, false, internal_problem_no, | |
487 | false, false | |
488 | }; | |
489 | ||
490 | void | |
491 | demangler_vwarning (const char *file, int line, const char *fmt, va_list ap) | |
492 | { | |
493 | internal_vproblem (&demangler_warning_problem, file, line, fmt, ap); | |
494 | } | |
495 | ||
496 | void | |
497 | demangler_warning (const char *file, int line, const char *string, ...) | |
498 | { | |
499 | va_list ap; | |
500 | ||
501 | va_start (ap, string); | |
502 | demangler_vwarning (file, line, string, ap); | |
503 | va_end (ap); | |
504 | } | |
505 | ||
506 | /* When GDB reports an internal problem (error or warning) it gives | |
507 | the user the opportunity to quit GDB and/or create a core file of | |
508 | the current debug session. This function registers a few commands | |
509 | that make it possible to specify that GDB should always or never | |
510 | quit or create a core file, without asking. The commands look | |
511 | like: | |
512 | ||
513 | maint set PROBLEM-NAME quit ask|yes|no | |
514 | maint show PROBLEM-NAME quit | |
515 | maint set PROBLEM-NAME corefile ask|yes|no | |
516 | maint show PROBLEM-NAME corefile | |
517 | ||
518 | Where PROBLEM-NAME is currently "internal-error" or | |
519 | "internal-warning". */ | |
520 | ||
521 | static void | |
522 | add_internal_problem_command (struct internal_problem *problem) | |
523 | { | |
524 | struct cmd_list_element **set_cmd_list; | |
525 | struct cmd_list_element **show_cmd_list; | |
526 | ||
527 | set_cmd_list = XNEW (struct cmd_list_element *); | |
528 | show_cmd_list = XNEW (struct cmd_list_element *); | |
529 | *set_cmd_list = NULL; | |
530 | *show_cmd_list = NULL; | |
531 | ||
532 | /* The add_basic_prefix_cmd and add_show_prefix_cmd functions take | |
533 | ownership of the string passed in, which is why we don't need to free | |
534 | set_doc and show_doc in this function. */ | |
535 | const char *set_doc | |
536 | = xstrprintf (_("Configure what GDB does when %s is detected."), | |
537 | problem->name).release (); | |
538 | const char *show_doc | |
539 | = xstrprintf (_("Show what GDB does when %s is detected."), | |
540 | problem->name).release (); | |
541 | ||
542 | add_setshow_prefix_cmd (problem->name, class_maintenance, | |
543 | set_doc, show_doc, set_cmd_list, show_cmd_list, | |
544 | &maintenance_set_cmdlist, &maintenance_show_cmdlist); | |
545 | ||
546 | if (problem->user_settable_should_quit) | |
547 | { | |
548 | std::string set_quit_doc | |
549 | = string_printf (_("Set whether GDB should quit when an %s is " | |
550 | "detected."), problem->name); | |
551 | std::string show_quit_doc | |
552 | = string_printf (_("Show whether GDB will quit when an %s is " | |
553 | "detected."), problem->name); | |
554 | add_setshow_enum_cmd ("quit", class_maintenance, | |
555 | internal_problem_modes, | |
556 | &problem->should_quit, | |
557 | set_quit_doc.c_str (), | |
558 | show_quit_doc.c_str (), | |
559 | NULL, /* help_doc */ | |
560 | NULL, /* setfunc */ | |
561 | NULL, /* showfunc */ | |
562 | set_cmd_list, | |
563 | show_cmd_list); | |
564 | } | |
565 | ||
566 | if (problem->user_settable_should_dump_core) | |
567 | { | |
568 | std::string set_core_doc | |
569 | = string_printf (_("Set whether GDB should create a core file of " | |
570 | "GDB when %s is detected."), problem->name); | |
571 | std::string show_core_doc | |
572 | = string_printf (_("Show whether GDB will create a core file of " | |
573 | "GDB when %s is detected."), problem->name); | |
574 | add_setshow_enum_cmd ("corefile", class_maintenance, | |
575 | internal_problem_modes, | |
576 | &problem->should_dump_core, | |
577 | set_core_doc.c_str (), | |
578 | show_core_doc.c_str (), | |
579 | NULL, /* help_doc */ | |
580 | NULL, /* setfunc */ | |
581 | NULL, /* showfunc */ | |
582 | set_cmd_list, | |
583 | show_cmd_list); | |
584 | } | |
585 | ||
586 | if (problem->user_settable_should_print_backtrace) | |
587 | { | |
588 | std::string set_bt_doc | |
589 | = string_printf (_("Set whether GDB should print a backtrace of " | |
590 | "GDB when %s is detected."), problem->name); | |
591 | std::string show_bt_doc | |
592 | = string_printf (_("Show whether GDB will print a backtrace of " | |
593 | "GDB when %s is detected."), problem->name); | |
594 | add_setshow_boolean_cmd ("backtrace", class_maintenance, | |
595 | &problem->should_print_backtrace, | |
596 | set_bt_doc.c_str (), | |
597 | show_bt_doc.c_str (), | |
598 | NULL, /* help_doc */ | |
599 | gdb_internal_backtrace_set_cmd, | |
600 | NULL, /* showfunc */ | |
601 | set_cmd_list, | |
602 | show_cmd_list); | |
603 | } | |
604 | } | |
605 | ||
606 | /* Return a newly allocated string, containing the PREFIX followed | |
607 | by the system error message for errno (separated by a colon). */ | |
608 | ||
609 | static std::string | |
610 | perror_string (const char *prefix) | |
611 | { | |
612 | const char *err = safe_strerror (errno); | |
613 | return std::string (prefix) + ": " + err; | |
614 | } | |
615 | ||
616 | /* Print the system error message for errno, and also mention STRING | |
617 | as the file name for which the error was encountered. Use ERRCODE | |
618 | for the thrown exception. Then return to command level. */ | |
619 | ||
620 | void | |
621 | throw_perror_with_name (enum errors errcode, const char *string) | |
622 | { | |
623 | std::string combined = perror_string (string); | |
624 | ||
625 | /* I understand setting these is a matter of taste. Still, some people | |
626 | may clear errno but not know about bfd_error. Doing this here is not | |
627 | unreasonable. */ | |
628 | bfd_set_error (bfd_error_no_error); | |
629 | errno = 0; | |
630 | ||
631 | throw_error (errcode, _("%s."), combined.c_str ()); | |
632 | } | |
633 | ||
634 | /* See throw_perror_with_name, ERRCODE defaults here to GENERIC_ERROR. */ | |
635 | ||
636 | void | |
637 | perror_with_name (const char *string) | |
638 | { | |
639 | throw_perror_with_name (GENERIC_ERROR, string); | |
640 | } | |
641 | ||
642 | /* Same as perror_with_name except that it prints a warning instead | |
643 | of throwing an error. */ | |
644 | ||
645 | void | |
646 | perror_warning_with_name (const char *string) | |
647 | { | |
648 | std::string combined = perror_string (string); | |
649 | warning (_("%s"), combined.c_str ()); | |
650 | } | |
651 | ||
652 | /* Print the system error message for ERRCODE, and also mention STRING | |
653 | as the file name for which the error was encountered. */ | |
654 | ||
655 | void | |
656 | print_sys_errmsg (const char *string, int errcode) | |
657 | { | |
658 | const char *err = safe_strerror (errcode); | |
659 | /* We want anything which was printed on stdout to come out first, before | |
660 | this message. */ | |
661 | gdb_flush (gdb_stdout); | |
662 | fprintf_unfiltered (gdb_stderr, "%s: %s.\n", string, err); | |
663 | } | |
664 | ||
665 | /* Control C eventually causes this to be called, at a convenient time. */ | |
666 | ||
667 | void | |
668 | quit (void) | |
669 | { | |
670 | if (sync_quit_force_run) | |
671 | { | |
672 | sync_quit_force_run = 0; | |
673 | quit_force (NULL, 0); | |
674 | } | |
675 | ||
676 | #ifdef __MSDOS__ | |
677 | /* No steenking SIGINT will ever be coming our way when the | |
678 | program is resumed. Don't lie. */ | |
679 | throw_quit ("Quit"); | |
680 | #else | |
681 | if (job_control | |
682 | /* If there is no terminal switching for this target, then we can't | |
683 | possibly get screwed by the lack of job control. */ | |
684 | || !target_supports_terminal_ours ()) | |
685 | throw_quit ("Quit"); | |
686 | else | |
687 | throw_quit ("Quit (expect signal SIGINT when the program is resumed)"); | |
688 | #endif | |
689 | } | |
690 | ||
691 | /* See defs.h. */ | |
692 | ||
693 | void | |
694 | maybe_quit (void) | |
695 | { | |
696 | if (sync_quit_force_run) | |
697 | quit (); | |
698 | ||
699 | quit_handler (); | |
700 | } | |
701 | ||
702 | \f | |
703 | /* Called when a memory allocation fails, with the number of bytes of | |
704 | memory requested in SIZE. */ | |
705 | ||
706 | void | |
707 | malloc_failure (long size) | |
708 | { | |
709 | if (size > 0) | |
710 | { | |
711 | internal_error (__FILE__, __LINE__, | |
712 | _("virtual memory exhausted: can't allocate %ld bytes."), | |
713 | size); | |
714 | } | |
715 | else | |
716 | { | |
717 | internal_error (__FILE__, __LINE__, _("virtual memory exhausted.")); | |
718 | } | |
719 | } | |
720 | ||
721 | /* See common/errors.h. */ | |
722 | ||
723 | void | |
724 | flush_streams () | |
725 | { | |
726 | gdb_stdout->flush (); | |
727 | gdb_stderr->flush (); | |
728 | } | |
729 | ||
730 | /* My replacement for the read system call. | |
731 | Used like `read' but keeps going if `read' returns too soon. */ | |
732 | ||
733 | int | |
734 | myread (int desc, char *addr, int len) | |
735 | { | |
736 | int val; | |
737 | int orglen = len; | |
738 | ||
739 | while (len > 0) | |
740 | { | |
741 | val = read (desc, addr, len); | |
742 | if (val < 0) | |
743 | return val; | |
744 | if (val == 0) | |
745 | return orglen - len; | |
746 | len -= val; | |
747 | addr += val; | |
748 | } | |
749 | return orglen; | |
750 | } | |
751 | ||
752 | /* See utils.h. */ | |
753 | ||
754 | ULONGEST | |
755 | uinteger_pow (ULONGEST v1, LONGEST v2) | |
756 | { | |
757 | if (v2 < 0) | |
758 | { | |
759 | if (v1 == 0) | |
760 | error (_("Attempt to raise 0 to negative power.")); | |
761 | else | |
762 | return 0; | |
763 | } | |
764 | else | |
765 | { | |
766 | /* The Russian Peasant's Algorithm. */ | |
767 | ULONGEST v; | |
768 | ||
769 | v = 1; | |
770 | for (;;) | |
771 | { | |
772 | if (v2 & 1L) | |
773 | v *= v1; | |
774 | v2 >>= 1; | |
775 | if (v2 == 0) | |
776 | return v; | |
777 | v1 *= v1; | |
778 | } | |
779 | } | |
780 | } | |
781 | ||
782 | void | |
783 | print_spaces (int n, struct ui_file *file) | |
784 | { | |
785 | fputs_unfiltered (n_spaces (n), file); | |
786 | } | |
787 | ||
788 | /* Print a host address. */ | |
789 | ||
790 | void | |
791 | gdb_print_host_address_1 (const void *addr, struct ui_file *stream) | |
792 | { | |
793 | fprintf_filtered (stream, "%s", host_address_to_string (addr)); | |
794 | } | |
795 | ||
796 | \f | |
797 | ||
798 | /* An RAII class that sets up to handle input and then tears down | |
799 | during destruction. */ | |
800 | ||
801 | class scoped_input_handler | |
802 | { | |
803 | public: | |
804 | ||
805 | scoped_input_handler () | |
806 | : m_quit_handler (&quit_handler, default_quit_handler), | |
807 | m_ui (NULL) | |
808 | { | |
809 | target_terminal::ours (); | |
810 | ui_register_input_event_handler (current_ui); | |
811 | if (current_ui->prompt_state == PROMPT_BLOCKED) | |
812 | m_ui = current_ui; | |
813 | } | |
814 | ||
815 | ~scoped_input_handler () | |
816 | { | |
817 | if (m_ui != NULL) | |
818 | ui_unregister_input_event_handler (m_ui); | |
819 | } | |
820 | ||
821 | DISABLE_COPY_AND_ASSIGN (scoped_input_handler); | |
822 | ||
823 | private: | |
824 | ||
825 | /* Save and restore the terminal state. */ | |
826 | target_terminal::scoped_restore_terminal_state m_term_state; | |
827 | ||
828 | /* Save and restore the quit handler. */ | |
829 | scoped_restore_tmpl<quit_handler_ftype *> m_quit_handler; | |
830 | ||
831 | /* The saved UI, if non-NULL. */ | |
832 | struct ui *m_ui; | |
833 | }; | |
834 | ||
835 | \f | |
836 | ||
837 | /* This function supports the query, nquery, and yquery functions. | |
838 | Ask user a y-or-n question and return 0 if answer is no, 1 if | |
839 | answer is yes, or default the answer to the specified default | |
840 | (for yquery or nquery). DEFCHAR may be 'y' or 'n' to provide a | |
841 | default answer, or '\0' for no default. | |
842 | CTLSTR is the control string and should end in "? ". It should | |
843 | not say how to answer, because we do that. | |
844 | ARGS are the arguments passed along with the CTLSTR argument to | |
845 | printf. */ | |
846 | ||
847 | static int ATTRIBUTE_PRINTF (1, 0) | |
848 | defaulted_query (const char *ctlstr, const char defchar, va_list args) | |
849 | { | |
850 | int retval; | |
851 | int def_value; | |
852 | char def_answer, not_def_answer; | |
853 | const char *y_string, *n_string; | |
854 | ||
855 | /* Set up according to which answer is the default. */ | |
856 | if (defchar == '\0') | |
857 | { | |
858 | def_value = 1; | |
859 | def_answer = 'Y'; | |
860 | not_def_answer = 'N'; | |
861 | y_string = "y"; | |
862 | n_string = "n"; | |
863 | } | |
864 | else if (defchar == 'y') | |
865 | { | |
866 | def_value = 1; | |
867 | def_answer = 'Y'; | |
868 | not_def_answer = 'N'; | |
869 | y_string = "[y]"; | |
870 | n_string = "n"; | |
871 | } | |
872 | else | |
873 | { | |
874 | def_value = 0; | |
875 | def_answer = 'N'; | |
876 | not_def_answer = 'Y'; | |
877 | y_string = "y"; | |
878 | n_string = "[n]"; | |
879 | } | |
880 | ||
881 | /* Automatically answer the default value if the user did not want | |
882 | prompts or the command was issued with the server prefix. */ | |
883 | if (!confirm || server_command) | |
884 | return def_value; | |
885 | ||
886 | /* If input isn't coming from the user directly, just say what | |
887 | question we're asking, and then answer the default automatically. This | |
888 | way, important error messages don't get lost when talking to GDB | |
889 | over a pipe. */ | |
890 | if (current_ui->instream != current_ui->stdin_stream | |
891 | || !input_interactive_p (current_ui) | |
892 | /* Restrict queries to the main UI. */ | |
893 | || current_ui != main_ui) | |
894 | { | |
895 | target_terminal::scoped_restore_terminal_state term_state; | |
896 | target_terminal::ours_for_output (); | |
897 | wrap_here (""); | |
898 | vfprintf_filtered (gdb_stdout, ctlstr, args); | |
899 | ||
900 | printf_filtered (_("(%s or %s) [answered %c; " | |
901 | "input not from terminal]\n"), | |
902 | y_string, n_string, def_answer); | |
903 | ||
904 | return def_value; | |
905 | } | |
906 | ||
907 | if (deprecated_query_hook) | |
908 | { | |
909 | target_terminal::scoped_restore_terminal_state term_state; | |
910 | return deprecated_query_hook (ctlstr, args); | |
911 | } | |
912 | ||
913 | /* Format the question outside of the loop, to avoid reusing args. */ | |
914 | std::string question = string_vprintf (ctlstr, args); | |
915 | std::string prompt | |
916 | = string_printf (_("%s%s(%s or %s) %s"), | |
917 | annotation_level > 1 ? "\n\032\032pre-query\n" : "", | |
918 | question.c_str (), y_string, n_string, | |
919 | annotation_level > 1 ? "\n\032\032query\n" : ""); | |
920 | ||
921 | /* Used to add duration we waited for user to respond to | |
922 | prompt_for_continue_wait_time. */ | |
923 | using namespace std::chrono; | |
924 | steady_clock::time_point prompt_started = steady_clock::now (); | |
925 | ||
926 | scoped_input_handler prepare_input; | |
927 | ||
928 | while (1) | |
929 | { | |
930 | char *response, answer; | |
931 | ||
932 | gdb_flush (gdb_stdout); | |
933 | response = gdb_readline_wrapper (prompt.c_str ()); | |
934 | ||
935 | if (response == NULL) /* C-d */ | |
936 | { | |
937 | printf_filtered ("EOF [assumed %c]\n", def_answer); | |
938 | retval = def_value; | |
939 | break; | |
940 | } | |
941 | ||
942 | answer = response[0]; | |
943 | xfree (response); | |
944 | ||
945 | if (answer >= 'a') | |
946 | answer -= 040; | |
947 | /* Check answer. For the non-default, the user must specify | |
948 | the non-default explicitly. */ | |
949 | if (answer == not_def_answer) | |
950 | { | |
951 | retval = !def_value; | |
952 | break; | |
953 | } | |
954 | /* Otherwise, if a default was specified, the user may either | |
955 | specify the required input or have it default by entering | |
956 | nothing. */ | |
957 | if (answer == def_answer | |
958 | || (defchar != '\0' && answer == '\0')) | |
959 | { | |
960 | retval = def_value; | |
961 | break; | |
962 | } | |
963 | /* Invalid entries are not defaulted and require another selection. */ | |
964 | printf_filtered (_("Please answer %s or %s.\n"), | |
965 | y_string, n_string); | |
966 | } | |
967 | ||
968 | /* Add time spend in this routine to prompt_for_continue_wait_time. */ | |
969 | prompt_for_continue_wait_time += steady_clock::now () - prompt_started; | |
970 | ||
971 | if (annotation_level > 1) | |
972 | printf_filtered (("\n\032\032post-query\n")); | |
973 | return retval; | |
974 | } | |
975 | \f | |
976 | ||
977 | /* Ask user a y-or-n question and return 0 if answer is no, 1 if | |
978 | answer is yes, or 0 if answer is defaulted. | |
979 | Takes three args which are given to printf to print the question. | |
980 | The first, a control string, should end in "? ". | |
981 | It should not say how to answer, because we do that. */ | |
982 | ||
983 | int | |
984 | nquery (const char *ctlstr, ...) | |
985 | { | |
986 | va_list args; | |
987 | int ret; | |
988 | ||
989 | va_start (args, ctlstr); | |
990 | ret = defaulted_query (ctlstr, 'n', args); | |
991 | va_end (args); | |
992 | return ret; | |
993 | } | |
994 | ||
995 | /* Ask user a y-or-n question and return 0 if answer is no, 1 if | |
996 | answer is yes, or 1 if answer is defaulted. | |
997 | Takes three args which are given to printf to print the question. | |
998 | The first, a control string, should end in "? ". | |
999 | It should not say how to answer, because we do that. */ | |
1000 | ||
1001 | int | |
1002 | yquery (const char *ctlstr, ...) | |
1003 | { | |
1004 | va_list args; | |
1005 | int ret; | |
1006 | ||
1007 | va_start (args, ctlstr); | |
1008 | ret = defaulted_query (ctlstr, 'y', args); | |
1009 | va_end (args); | |
1010 | return ret; | |
1011 | } | |
1012 | ||
1013 | /* Ask user a y-or-n question and return 1 iff answer is yes. | |
1014 | Takes three args which are given to printf to print the question. | |
1015 | The first, a control string, should end in "? ". | |
1016 | It should not say how to answer, because we do that. */ | |
1017 | ||
1018 | int | |
1019 | query (const char *ctlstr, ...) | |
1020 | { | |
1021 | va_list args; | |
1022 | int ret; | |
1023 | ||
1024 | va_start (args, ctlstr); | |
1025 | ret = defaulted_query (ctlstr, '\0', args); | |
1026 | va_end (args); | |
1027 | return ret; | |
1028 | } | |
1029 | ||
1030 | /* A helper for parse_escape that converts a host character to a | |
1031 | target character. C is the host character. If conversion is | |
1032 | possible, then the target character is stored in *TARGET_C and the | |
1033 | function returns 1. Otherwise, the function returns 0. */ | |
1034 | ||
1035 | static int | |
1036 | host_char_to_target (struct gdbarch *gdbarch, int c, int *target_c) | |
1037 | { | |
1038 | char the_char = c; | |
1039 | int result = 0; | |
1040 | ||
1041 | auto_obstack host_data; | |
1042 | ||
1043 | convert_between_encodings (target_charset (gdbarch), host_charset (), | |
1044 | (gdb_byte *) &the_char, 1, 1, | |
1045 | &host_data, translit_none); | |
1046 | ||
1047 | if (obstack_object_size (&host_data) == 1) | |
1048 | { | |
1049 | result = 1; | |
1050 | *target_c = *(char *) obstack_base (&host_data); | |
1051 | } | |
1052 | ||
1053 | return result; | |
1054 | } | |
1055 | ||
1056 | /* Parse a C escape sequence. STRING_PTR points to a variable | |
1057 | containing a pointer to the string to parse. That pointer | |
1058 | should point to the character after the \. That pointer | |
1059 | is updated past the characters we use. The value of the | |
1060 | escape sequence is returned. | |
1061 | ||
1062 | A negative value means the sequence \ newline was seen, | |
1063 | which is supposed to be equivalent to nothing at all. | |
1064 | ||
1065 | If \ is followed by a null character, we return a negative | |
1066 | value and leave the string pointer pointing at the null character. | |
1067 | ||
1068 | If \ is followed by 000, we return 0 and leave the string pointer | |
1069 | after the zeros. A value of 0 does not mean end of string. */ | |
1070 | ||
1071 | int | |
1072 | parse_escape (struct gdbarch *gdbarch, const char **string_ptr) | |
1073 | { | |
1074 | int target_char = -2; /* Initialize to avoid GCC warnings. */ | |
1075 | int c = *(*string_ptr)++; | |
1076 | ||
1077 | switch (c) | |
1078 | { | |
1079 | case '\n': | |
1080 | return -2; | |
1081 | case 0: | |
1082 | (*string_ptr)--; | |
1083 | return 0; | |
1084 | ||
1085 | case '0': | |
1086 | case '1': | |
1087 | case '2': | |
1088 | case '3': | |
1089 | case '4': | |
1090 | case '5': | |
1091 | case '6': | |
1092 | case '7': | |
1093 | { | |
1094 | int i = host_hex_value (c); | |
1095 | int count = 0; | |
1096 | while (++count < 3) | |
1097 | { | |
1098 | c = (**string_ptr); | |
1099 | if (ISDIGIT (c) && c != '8' && c != '9') | |
1100 | { | |
1101 | (*string_ptr)++; | |
1102 | i *= 8; | |
1103 | i += host_hex_value (c); | |
1104 | } | |
1105 | else | |
1106 | { | |
1107 | break; | |
1108 | } | |
1109 | } | |
1110 | return i; | |
1111 | } | |
1112 | ||
1113 | case 'a': | |
1114 | c = '\a'; | |
1115 | break; | |
1116 | case 'b': | |
1117 | c = '\b'; | |
1118 | break; | |
1119 | case 'f': | |
1120 | c = '\f'; | |
1121 | break; | |
1122 | case 'n': | |
1123 | c = '\n'; | |
1124 | break; | |
1125 | case 'r': | |
1126 | c = '\r'; | |
1127 | break; | |
1128 | case 't': | |
1129 | c = '\t'; | |
1130 | break; | |
1131 | case 'v': | |
1132 | c = '\v'; | |
1133 | break; | |
1134 | ||
1135 | default: | |
1136 | break; | |
1137 | } | |
1138 | ||
1139 | if (!host_char_to_target (gdbarch, c, &target_char)) | |
1140 | error (_("The escape sequence `\\%c' is equivalent to plain `%c'," | |
1141 | " which has no equivalent\nin the `%s' character set."), | |
1142 | c, c, target_charset (gdbarch)); | |
1143 | return target_char; | |
1144 | } | |
1145 | \f | |
1146 | /* Print the character C on STREAM as part of the contents of a literal | |
1147 | string whose delimiter is QUOTER. Note that this routine should only | |
1148 | be called for printing things which are independent of the language | |
1149 | of the program being debugged. | |
1150 | ||
1151 | printchar will normally escape backslashes and instances of QUOTER. If | |
1152 | QUOTER is 0, printchar won't escape backslashes or any quoting character. | |
1153 | As a side effect, if you pass the backslash character as the QUOTER, | |
1154 | printchar will escape backslashes as usual, but not any other quoting | |
1155 | character. */ | |
1156 | ||
1157 | static void | |
1158 | printchar (int c, do_fputc_ftype do_fputc, ui_file *stream, int quoter) | |
1159 | { | |
1160 | c &= 0xFF; /* Avoid sign bit follies */ | |
1161 | ||
1162 | if (c < 0x20 || /* Low control chars */ | |
1163 | (c >= 0x7F && c < 0xA0) || /* DEL, High controls */ | |
1164 | (sevenbit_strings && c >= 0x80)) | |
1165 | { /* high order bit set */ | |
1166 | do_fputc ('\\', stream); | |
1167 | ||
1168 | switch (c) | |
1169 | { | |
1170 | case '\n': | |
1171 | do_fputc ('n', stream); | |
1172 | break; | |
1173 | case '\b': | |
1174 | do_fputc ('b', stream); | |
1175 | break; | |
1176 | case '\t': | |
1177 | do_fputc ('t', stream); | |
1178 | break; | |
1179 | case '\f': | |
1180 | do_fputc ('f', stream); | |
1181 | break; | |
1182 | case '\r': | |
1183 | do_fputc ('r', stream); | |
1184 | break; | |
1185 | case '\033': | |
1186 | do_fputc ('e', stream); | |
1187 | break; | |
1188 | case '\007': | |
1189 | do_fputc ('a', stream); | |
1190 | break; | |
1191 | default: | |
1192 | { | |
1193 | do_fputc ('0' + ((c >> 6) & 0x7), stream); | |
1194 | do_fputc ('0' + ((c >> 3) & 0x7), stream); | |
1195 | do_fputc ('0' + ((c >> 0) & 0x7), stream); | |
1196 | break; | |
1197 | } | |
1198 | } | |
1199 | } | |
1200 | else | |
1201 | { | |
1202 | if (quoter != 0 && (c == '\\' || c == quoter)) | |
1203 | do_fputc ('\\', stream); | |
1204 | do_fputc (c, stream); | |
1205 | } | |
1206 | } | |
1207 | ||
1208 | /* Print the character C on STREAM as part of the contents of a | |
1209 | literal string whose delimiter is QUOTER. Note that these routines | |
1210 | should only be call for printing things which are independent of | |
1211 | the language of the program being debugged. */ | |
1212 | ||
1213 | void | |
1214 | fputstr_filtered (const char *str, int quoter, struct ui_file *stream) | |
1215 | { | |
1216 | while (*str) | |
1217 | printchar (*str++, fputc_filtered, stream, quoter); | |
1218 | } | |
1219 | ||
1220 | void | |
1221 | fputstr_unfiltered (const char *str, int quoter, struct ui_file *stream) | |
1222 | { | |
1223 | while (*str) | |
1224 | printchar (*str++, fputc_unfiltered, stream, quoter); | |
1225 | } | |
1226 | ||
1227 | void | |
1228 | fputstrn_filtered (const char *str, int n, int quoter, | |
1229 | struct ui_file *stream) | |
1230 | { | |
1231 | for (int i = 0; i < n; i++) | |
1232 | printchar (str[i], fputc_filtered, stream, quoter); | |
1233 | } | |
1234 | ||
1235 | void | |
1236 | fputstrn_unfiltered (const char *str, int n, int quoter, | |
1237 | do_fputc_ftype do_fputc, struct ui_file *stream) | |
1238 | { | |
1239 | for (int i = 0; i < n; i++) | |
1240 | printchar (str[i], do_fputc, stream, quoter); | |
1241 | } | |
1242 | \f | |
1243 | ||
1244 | /* Number of lines per page or UINT_MAX if paging is disabled. */ | |
1245 | static unsigned int lines_per_page; | |
1246 | static void | |
1247 | show_lines_per_page (struct ui_file *file, int from_tty, | |
1248 | struct cmd_list_element *c, const char *value) | |
1249 | { | |
1250 | fprintf_filtered (file, | |
1251 | _("Number of lines gdb thinks are in a page is %s.\n"), | |
1252 | value); | |
1253 | } | |
1254 | ||
1255 | /* Number of chars per line or UINT_MAX if line folding is disabled. */ | |
1256 | static unsigned int chars_per_line; | |
1257 | static void | |
1258 | show_chars_per_line (struct ui_file *file, int from_tty, | |
1259 | struct cmd_list_element *c, const char *value) | |
1260 | { | |
1261 | fprintf_filtered (file, | |
1262 | _("Number of characters gdb thinks " | |
1263 | "are in a line is %s.\n"), | |
1264 | value); | |
1265 | } | |
1266 | ||
1267 | /* Current count of lines printed on this page, chars on this line. */ | |
1268 | static unsigned int lines_printed, chars_printed; | |
1269 | ||
1270 | /* True if pagination is disabled for just one command. */ | |
1271 | ||
1272 | static bool pagination_disabled_for_command; | |
1273 | ||
1274 | /* Buffer and start column of buffered text, for doing smarter word- | |
1275 | wrapping. When someone calls wrap_here(), we start buffering output | |
1276 | that comes through fputs_filtered(). If we see a newline, we just | |
1277 | spit it out and forget about the wrap_here(). If we see another | |
1278 | wrap_here(), we spit it out and remember the newer one. If we see | |
1279 | the end of the line, we spit out a newline, the indent, and then | |
1280 | the buffered output. */ | |
1281 | ||
1282 | static bool filter_initialized = false; | |
1283 | ||
1284 | /* Contains characters which are waiting to be output (they have | |
1285 | already been counted in chars_printed). */ | |
1286 | static std::string wrap_buffer; | |
1287 | ||
1288 | /* String to indent by if the wrap occurs. Must not be NULL if wrap_column | |
1289 | is non-zero. */ | |
1290 | static const char *wrap_indent; | |
1291 | ||
1292 | /* Column number on the screen where wrap_buffer begins, or 0 if wrapping | |
1293 | is not in effect. */ | |
1294 | static int wrap_column; | |
1295 | ||
1296 | /* The style applied at the time that wrap_here was called. */ | |
1297 | static ui_file_style wrap_style; | |
1298 | \f | |
1299 | ||
1300 | /* Initialize the number of lines per page and chars per line. */ | |
1301 | ||
1302 | void | |
1303 | init_page_info (void) | |
1304 | { | |
1305 | if (batch_flag) | |
1306 | { | |
1307 | lines_per_page = UINT_MAX; | |
1308 | chars_per_line = UINT_MAX; | |
1309 | } | |
1310 | else | |
1311 | #if defined(TUI) | |
1312 | if (!tui_get_command_dimension (&chars_per_line, &lines_per_page)) | |
1313 | #endif | |
1314 | { | |
1315 | int rows, cols; | |
1316 | ||
1317 | #if defined(__GO32__) | |
1318 | rows = ScreenRows (); | |
1319 | cols = ScreenCols (); | |
1320 | lines_per_page = rows; | |
1321 | chars_per_line = cols; | |
1322 | #else | |
1323 | /* Make sure Readline has initialized its terminal settings. */ | |
1324 | rl_reset_terminal (NULL); | |
1325 | ||
1326 | /* Get the screen size from Readline. */ | |
1327 | rl_get_screen_size (&rows, &cols); | |
1328 | lines_per_page = rows; | |
1329 | chars_per_line = cols; | |
1330 | ||
1331 | /* Readline should have fetched the termcap entry for us. | |
1332 | Only try to use tgetnum function if rl_get_screen_size | |
1333 | did not return a useful value. */ | |
1334 | if (((rows <= 0) && (tgetnum ((char *) "li") < 0)) | |
1335 | /* Also disable paging if inside Emacs. $EMACS was used | |
1336 | before Emacs v25.1, $INSIDE_EMACS is used since then. */ | |
1337 | || getenv ("EMACS") || getenv ("INSIDE_EMACS")) | |
1338 | { | |
1339 | /* The number of lines per page is not mentioned in the terminal | |
1340 | description or EMACS environment variable is set. This probably | |
1341 | means that paging is not useful, so disable paging. */ | |
1342 | lines_per_page = UINT_MAX; | |
1343 | } | |
1344 | ||
1345 | /* If the output is not a terminal, don't paginate it. */ | |
1346 | if (!gdb_stdout->isatty ()) | |
1347 | lines_per_page = UINT_MAX; | |
1348 | #endif | |
1349 | } | |
1350 | ||
1351 | /* We handle SIGWINCH ourselves. */ | |
1352 | rl_catch_sigwinch = 0; | |
1353 | ||
1354 | set_screen_size (); | |
1355 | set_width (); | |
1356 | } | |
1357 | ||
1358 | /* Return nonzero if filtered printing is initialized. */ | |
1359 | int | |
1360 | filtered_printing_initialized (void) | |
1361 | { | |
1362 | return filter_initialized; | |
1363 | } | |
1364 | ||
1365 | set_batch_flag_and_restore_page_info::set_batch_flag_and_restore_page_info () | |
1366 | : m_save_lines_per_page (lines_per_page), | |
1367 | m_save_chars_per_line (chars_per_line), | |
1368 | m_save_batch_flag (batch_flag) | |
1369 | { | |
1370 | batch_flag = 1; | |
1371 | init_page_info (); | |
1372 | } | |
1373 | ||
1374 | set_batch_flag_and_restore_page_info::~set_batch_flag_and_restore_page_info () | |
1375 | { | |
1376 | batch_flag = m_save_batch_flag; | |
1377 | chars_per_line = m_save_chars_per_line; | |
1378 | lines_per_page = m_save_lines_per_page; | |
1379 | ||
1380 | set_screen_size (); | |
1381 | set_width (); | |
1382 | } | |
1383 | ||
1384 | /* Set the screen size based on LINES_PER_PAGE and CHARS_PER_LINE. */ | |
1385 | ||
1386 | static void | |
1387 | set_screen_size (void) | |
1388 | { | |
1389 | int rows = lines_per_page; | |
1390 | int cols = chars_per_line; | |
1391 | ||
1392 | /* If we get 0 or negative ROWS or COLS, treat as "infinite" size. | |
1393 | A negative number can be seen here with the "set width/height" | |
1394 | commands and either: | |
1395 | ||
1396 | - the user specified "unlimited", which maps to UINT_MAX, or | |
1397 | - the user specified some number between INT_MAX and UINT_MAX. | |
1398 | ||
1399 | Cap "infinity" to approximately sqrt(INT_MAX) so that we don't | |
1400 | overflow in rl_set_screen_size, which multiplies rows and columns | |
1401 | to compute the number of characters on the screen. */ | |
1402 | ||
1403 | const int sqrt_int_max = INT_MAX >> (sizeof (int) * 8 / 2); | |
1404 | ||
1405 | if (rows <= 0 || rows > sqrt_int_max) | |
1406 | { | |
1407 | rows = sqrt_int_max; | |
1408 | lines_per_page = UINT_MAX; | |
1409 | } | |
1410 | ||
1411 | if (cols <= 0 || cols > sqrt_int_max) | |
1412 | { | |
1413 | cols = sqrt_int_max; | |
1414 | chars_per_line = UINT_MAX; | |
1415 | } | |
1416 | ||
1417 | /* Update Readline's idea of the terminal size. */ | |
1418 | rl_set_screen_size (rows, cols); | |
1419 | } | |
1420 | ||
1421 | /* Reinitialize WRAP_BUFFER. */ | |
1422 | ||
1423 | static void | |
1424 | set_width (void) | |
1425 | { | |
1426 | if (chars_per_line == 0) | |
1427 | init_page_info (); | |
1428 | ||
1429 | wrap_buffer.clear (); | |
1430 | filter_initialized = true; | |
1431 | } | |
1432 | ||
1433 | static void | |
1434 | set_width_command (const char *args, int from_tty, struct cmd_list_element *c) | |
1435 | { | |
1436 | set_screen_size (); | |
1437 | set_width (); | |
1438 | } | |
1439 | ||
1440 | static void | |
1441 | set_height_command (const char *args, int from_tty, struct cmd_list_element *c) | |
1442 | { | |
1443 | set_screen_size (); | |
1444 | } | |
1445 | ||
1446 | /* See utils.h. */ | |
1447 | ||
1448 | void | |
1449 | set_screen_width_and_height (int width, int height) | |
1450 | { | |
1451 | lines_per_page = height; | |
1452 | chars_per_line = width; | |
1453 | ||
1454 | set_screen_size (); | |
1455 | set_width (); | |
1456 | } | |
1457 | ||
1458 | /* The currently applied style. */ | |
1459 | ||
1460 | static ui_file_style applied_style; | |
1461 | ||
1462 | /* Emit an ANSI style escape for STYLE. If STREAM is nullptr, emit to | |
1463 | the wrap buffer; otherwise emit to STREAM. */ | |
1464 | ||
1465 | static void | |
1466 | emit_style_escape (const ui_file_style &style, | |
1467 | struct ui_file *stream = nullptr) | |
1468 | { | |
1469 | if (applied_style != style) | |
1470 | { | |
1471 | applied_style = style; | |
1472 | ||
1473 | if (stream == nullptr) | |
1474 | wrap_buffer.append (style.to_ansi ()); | |
1475 | else | |
1476 | stream->puts (style.to_ansi ().c_str ()); | |
1477 | } | |
1478 | } | |
1479 | ||
1480 | /* Set the current output style. This will affect future uses of the | |
1481 | _filtered output functions. */ | |
1482 | ||
1483 | static void | |
1484 | set_output_style (struct ui_file *stream, const ui_file_style &style) | |
1485 | { | |
1486 | if (!stream->can_emit_style_escape ()) | |
1487 | return; | |
1488 | ||
1489 | /* Note that we may not pass STREAM here, when we want to emit to | |
1490 | the wrap buffer, not directly to STREAM. */ | |
1491 | if (stream == gdb_stdout) | |
1492 | stream = nullptr; | |
1493 | emit_style_escape (style, stream); | |
1494 | } | |
1495 | ||
1496 | /* See utils.h. */ | |
1497 | ||
1498 | void | |
1499 | reset_terminal_style (struct ui_file *stream) | |
1500 | { | |
1501 | if (stream->can_emit_style_escape ()) | |
1502 | { | |
1503 | /* Force the setting, regardless of what we think the setting | |
1504 | might already be. */ | |
1505 | applied_style = ui_file_style (); | |
1506 | wrap_buffer.append (applied_style.to_ansi ()); | |
1507 | } | |
1508 | } | |
1509 | ||
1510 | /* Wait, so the user can read what's on the screen. Prompt the user | |
1511 | to continue by pressing RETURN. 'q' is also provided because | |
1512 | telling users what to do in the prompt is more user-friendly than | |
1513 | expecting them to think of Ctrl-C/SIGINT. */ | |
1514 | ||
1515 | static void | |
1516 | prompt_for_continue (void) | |
1517 | { | |
1518 | char cont_prompt[120]; | |
1519 | /* Used to add duration we waited for user to respond to | |
1520 | prompt_for_continue_wait_time. */ | |
1521 | using namespace std::chrono; | |
1522 | steady_clock::time_point prompt_started = steady_clock::now (); | |
1523 | bool disable_pagination = pagination_disabled_for_command; | |
1524 | ||
1525 | /* Clear the current styling. */ | |
1526 | if (gdb_stdout->can_emit_style_escape ()) | |
1527 | emit_style_escape (ui_file_style (), gdb_stdout); | |
1528 | ||
1529 | if (annotation_level > 1) | |
1530 | printf_unfiltered (("\n\032\032pre-prompt-for-continue\n")); | |
1531 | ||
1532 | strcpy (cont_prompt, | |
1533 | "--Type <RET> for more, q to quit, " | |
1534 | "c to continue without paging--"); | |
1535 | if (annotation_level > 1) | |
1536 | strcat (cont_prompt, "\n\032\032prompt-for-continue\n"); | |
1537 | ||
1538 | /* We must do this *before* we call gdb_readline_wrapper, else it | |
1539 | will eventually call us -- thinking that we're trying to print | |
1540 | beyond the end of the screen. */ | |
1541 | reinitialize_more_filter (); | |
1542 | ||
1543 | scoped_input_handler prepare_input; | |
1544 | ||
1545 | /* Call gdb_readline_wrapper, not readline, in order to keep an | |
1546 | event loop running. */ | |
1547 | gdb::unique_xmalloc_ptr<char> ignore (gdb_readline_wrapper (cont_prompt)); | |
1548 | ||
1549 | /* Add time spend in this routine to prompt_for_continue_wait_time. */ | |
1550 | prompt_for_continue_wait_time += steady_clock::now () - prompt_started; | |
1551 | ||
1552 | if (annotation_level > 1) | |
1553 | printf_unfiltered (("\n\032\032post-prompt-for-continue\n")); | |
1554 | ||
1555 | if (ignore != NULL) | |
1556 | { | |
1557 | char *p = ignore.get (); | |
1558 | ||
1559 | while (*p == ' ' || *p == '\t') | |
1560 | ++p; | |
1561 | if (p[0] == 'q') | |
1562 | /* Do not call quit here; there is no possibility of SIGINT. */ | |
1563 | throw_quit ("Quit"); | |
1564 | if (p[0] == 'c') | |
1565 | disable_pagination = true; | |
1566 | } | |
1567 | ||
1568 | /* Now we have to do this again, so that GDB will know that it doesn't | |
1569 | need to save the ---Type <return>--- line at the top of the screen. */ | |
1570 | reinitialize_more_filter (); | |
1571 | pagination_disabled_for_command = disable_pagination; | |
1572 | ||
1573 | dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */ | |
1574 | } | |
1575 | ||
1576 | /* Initialize timer to keep track of how long we waited for the user. */ | |
1577 | ||
1578 | void | |
1579 | reset_prompt_for_continue_wait_time (void) | |
1580 | { | |
1581 | using namespace std::chrono; | |
1582 | ||
1583 | prompt_for_continue_wait_time = steady_clock::duration::zero (); | |
1584 | } | |
1585 | ||
1586 | /* Fetch the cumulative time spent in prompt_for_continue. */ | |
1587 | ||
1588 | std::chrono::steady_clock::duration | |
1589 | get_prompt_for_continue_wait_time () | |
1590 | { | |
1591 | return prompt_for_continue_wait_time; | |
1592 | } | |
1593 | ||
1594 | /* Reinitialize filter; ie. tell it to reset to original values. */ | |
1595 | ||
1596 | void | |
1597 | reinitialize_more_filter (void) | |
1598 | { | |
1599 | lines_printed = 0; | |
1600 | chars_printed = 0; | |
1601 | pagination_disabled_for_command = false; | |
1602 | } | |
1603 | ||
1604 | /* Flush the wrap buffer to STREAM, if necessary. */ | |
1605 | ||
1606 | static void | |
1607 | flush_wrap_buffer (struct ui_file *stream) | |
1608 | { | |
1609 | if (stream == gdb_stdout && !wrap_buffer.empty ()) | |
1610 | { | |
1611 | stream->puts (wrap_buffer.c_str ()); | |
1612 | wrap_buffer.clear (); | |
1613 | } | |
1614 | } | |
1615 | ||
1616 | /* See utils.h. */ | |
1617 | ||
1618 | void | |
1619 | gdb_flush (struct ui_file *stream) | |
1620 | { | |
1621 | flush_wrap_buffer (stream); | |
1622 | stream->flush (); | |
1623 | } | |
1624 | ||
1625 | /* See utils.h. */ | |
1626 | ||
1627 | int | |
1628 | get_chars_per_line () | |
1629 | { | |
1630 | return chars_per_line; | |
1631 | } | |
1632 | ||
1633 | /* Indicate that if the next sequence of characters overflows the line, | |
1634 | a newline should be inserted here rather than when it hits the end. | |
1635 | If INDENT is non-null, it is a string to be printed to indent the | |
1636 | wrapped part on the next line. INDENT must remain accessible until | |
1637 | the next call to wrap_here() or until a newline is printed through | |
1638 | fputs_filtered(). | |
1639 | ||
1640 | If the line is already overfull, we immediately print a newline and | |
1641 | the indentation, and disable further wrapping. | |
1642 | ||
1643 | If we don't know the width of lines, but we know the page height, | |
1644 | we must not wrap words, but should still keep track of newlines | |
1645 | that were explicitly printed. | |
1646 | ||
1647 | INDENT should not contain tabs, as that will mess up the char count | |
1648 | on the next line. FIXME. | |
1649 | ||
1650 | This routine is guaranteed to force out any output which has been | |
1651 | squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be | |
1652 | used to force out output from the wrap_buffer. */ | |
1653 | ||
1654 | void | |
1655 | wrap_here (const char *indent) | |
1656 | { | |
1657 | /* This should have been allocated, but be paranoid anyway. */ | |
1658 | gdb_assert (filter_initialized); | |
1659 | ||
1660 | flush_wrap_buffer (gdb_stdout); | |
1661 | if (chars_per_line == UINT_MAX) /* No line overflow checking. */ | |
1662 | { | |
1663 | wrap_column = 0; | |
1664 | } | |
1665 | else if (chars_printed >= chars_per_line) | |
1666 | { | |
1667 | puts_filtered ("\n"); | |
1668 | if (indent != NULL) | |
1669 | puts_filtered (indent); | |
1670 | wrap_column = 0; | |
1671 | } | |
1672 | else | |
1673 | { | |
1674 | wrap_column = chars_printed; | |
1675 | if (indent == NULL) | |
1676 | wrap_indent = ""; | |
1677 | else | |
1678 | wrap_indent = indent; | |
1679 | wrap_style = applied_style; | |
1680 | } | |
1681 | } | |
1682 | ||
1683 | /* Print input string to gdb_stdout, filtered, with wrap, | |
1684 | arranging strings in columns of n chars. String can be | |
1685 | right or left justified in the column. Never prints | |
1686 | trailing spaces. String should never be longer than | |
1687 | width. FIXME: this could be useful for the EXAMINE | |
1688 | command, which currently doesn't tabulate very well. */ | |
1689 | ||
1690 | void | |
1691 | puts_filtered_tabular (char *string, int width, int right) | |
1692 | { | |
1693 | int spaces = 0; | |
1694 | int stringlen; | |
1695 | char *spacebuf; | |
1696 | ||
1697 | gdb_assert (chars_per_line > 0); | |
1698 | if (chars_per_line == UINT_MAX) | |
1699 | { | |
1700 | fputs_filtered (string, gdb_stdout); | |
1701 | fputs_filtered ("\n", gdb_stdout); | |
1702 | return; | |
1703 | } | |
1704 | ||
1705 | if (((chars_printed - 1) / width + 2) * width >= chars_per_line) | |
1706 | fputs_filtered ("\n", gdb_stdout); | |
1707 | ||
1708 | if (width >= chars_per_line) | |
1709 | width = chars_per_line - 1; | |
1710 | ||
1711 | stringlen = strlen (string); | |
1712 | ||
1713 | if (chars_printed > 0) | |
1714 | spaces = width - (chars_printed - 1) % width - 1; | |
1715 | if (right) | |
1716 | spaces += width - stringlen; | |
1717 | ||
1718 | spacebuf = (char *) alloca (spaces + 1); | |
1719 | spacebuf[spaces] = '\0'; | |
1720 | while (spaces--) | |
1721 | spacebuf[spaces] = ' '; | |
1722 | ||
1723 | fputs_filtered (spacebuf, gdb_stdout); | |
1724 | fputs_filtered (string, gdb_stdout); | |
1725 | } | |
1726 | ||
1727 | ||
1728 | /* Ensure that whatever gets printed next, using the filtered output | |
1729 | commands, starts at the beginning of the line. I.e. if there is | |
1730 | any pending output for the current line, flush it and start a new | |
1731 | line. Otherwise do nothing. */ | |
1732 | ||
1733 | void | |
1734 | begin_line (void) | |
1735 | { | |
1736 | if (chars_printed > 0) | |
1737 | { | |
1738 | puts_filtered ("\n"); | |
1739 | } | |
1740 | } | |
1741 | ||
1742 | ||
1743 | /* Like fputs but if FILTER is true, pause after every screenful. | |
1744 | ||
1745 | Regardless of FILTER can wrap at points other than the final | |
1746 | character of a line. | |
1747 | ||
1748 | Unlike fputs, fputs_maybe_filtered does not return a value. | |
1749 | It is OK for LINEBUFFER to be NULL, in which case just don't print | |
1750 | anything. | |
1751 | ||
1752 | Note that a longjmp to top level may occur in this routine (only if | |
1753 | FILTER is true) (since prompt_for_continue may do so) so this | |
1754 | routine should not be called when cleanups are not in place. */ | |
1755 | ||
1756 | static void | |
1757 | fputs_maybe_filtered (const char *linebuffer, struct ui_file *stream, | |
1758 | int filter) | |
1759 | { | |
1760 | const char *lineptr; | |
1761 | ||
1762 | if (linebuffer == 0) | |
1763 | return; | |
1764 | ||
1765 | /* Don't do any filtering if it is disabled. */ | |
1766 | if (stream != gdb_stdout | |
1767 | || !pagination_enabled | |
1768 | || pagination_disabled_for_command | |
1769 | || batch_flag | |
1770 | || (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX) | |
1771 | || top_level_interpreter () == NULL | |
1772 | || top_level_interpreter ()->interp_ui_out ()->is_mi_like_p ()) | |
1773 | { | |
1774 | flush_wrap_buffer (stream); | |
1775 | stream->puts (linebuffer); | |
1776 | return; | |
1777 | } | |
1778 | ||
1779 | auto buffer_clearer | |
1780 | = make_scope_exit ([&] () | |
1781 | { | |
1782 | wrap_buffer.clear (); | |
1783 | wrap_column = 0; | |
1784 | wrap_indent = ""; | |
1785 | }); | |
1786 | ||
1787 | /* Go through and output each character. Show line extension | |
1788 | when this is necessary; prompt user for new page when this is | |
1789 | necessary. */ | |
1790 | ||
1791 | lineptr = linebuffer; | |
1792 | while (*lineptr) | |
1793 | { | |
1794 | /* Possible new page. Note that PAGINATION_DISABLED_FOR_COMMAND | |
1795 | might be set during this loop, so we must continue to check | |
1796 | it here. */ | |
1797 | if (filter && (lines_printed >= lines_per_page - 1) | |
1798 | && !pagination_disabled_for_command) | |
1799 | prompt_for_continue (); | |
1800 | ||
1801 | while (*lineptr && *lineptr != '\n') | |
1802 | { | |
1803 | int skip_bytes; | |
1804 | ||
1805 | /* Print a single line. */ | |
1806 | if (*lineptr == '\t') | |
1807 | { | |
1808 | wrap_buffer.push_back ('\t'); | |
1809 | /* Shifting right by 3 produces the number of tab stops | |
1810 | we have already passed, and then adding one and | |
1811 | shifting left 3 advances to the next tab stop. */ | |
1812 | chars_printed = ((chars_printed >> 3) + 1) << 3; | |
1813 | lineptr++; | |
1814 | } | |
1815 | else if (*lineptr == '\033' | |
1816 | && skip_ansi_escape (lineptr, &skip_bytes)) | |
1817 | { | |
1818 | wrap_buffer.append (lineptr, skip_bytes); | |
1819 | /* Note that we don't consider this a character, so we | |
1820 | don't increment chars_printed here. */ | |
1821 | lineptr += skip_bytes; | |
1822 | } | |
1823 | else if (*lineptr == '\r') | |
1824 | { | |
1825 | wrap_buffer.push_back (*lineptr); | |
1826 | chars_printed = 0; | |
1827 | lineptr++; | |
1828 | } | |
1829 | else | |
1830 | { | |
1831 | wrap_buffer.push_back (*lineptr); | |
1832 | chars_printed++; | |
1833 | lineptr++; | |
1834 | } | |
1835 | ||
1836 | if (chars_printed >= chars_per_line) | |
1837 | { | |
1838 | unsigned int save_chars = chars_printed; | |
1839 | ||
1840 | /* If we change the style, below, we'll want to reset it | |
1841 | before continuing to print. If there is no wrap | |
1842 | column, then we'll only reset the style if the pager | |
1843 | prompt is given; and to avoid emitting style | |
1844 | sequences in the middle of a run of text, we track | |
1845 | this as well. */ | |
1846 | ui_file_style save_style = applied_style; | |
1847 | bool did_paginate = false; | |
1848 | ||
1849 | chars_printed = 0; | |
1850 | lines_printed++; | |
1851 | if (wrap_column) | |
1852 | { | |
1853 | /* We are about to insert a newline at an historic | |
1854 | location in the WRAP_BUFFER. Before we do we want to | |
1855 | restore the default style. To know if we actually | |
1856 | need to insert an escape sequence we must restore the | |
1857 | current applied style to how it was at the WRAP_COLUMN | |
1858 | location. */ | |
1859 | applied_style = wrap_style; | |
1860 | if (stream->can_emit_style_escape ()) | |
1861 | emit_style_escape (ui_file_style (), stream); | |
1862 | /* If we aren't actually wrapping, don't output | |
1863 | newline -- if chars_per_line is right, we | |
1864 | probably just overflowed anyway; if it's wrong, | |
1865 | let us keep going. */ | |
1866 | /* XXX: The ideal thing would be to call | |
1867 | 'stream->putc' here, but we can't because it | |
1868 | currently calls 'fputc_unfiltered', which ends up | |
1869 | calling us, which generates an infinite | |
1870 | recursion. */ | |
1871 | stream->puts ("\n"); | |
1872 | } | |
1873 | else | |
1874 | flush_wrap_buffer (stream); | |
1875 | ||
1876 | /* Possible new page. Note that | |
1877 | PAGINATION_DISABLED_FOR_COMMAND might be set during | |
1878 | this loop, so we must continue to check it here. */ | |
1879 | if (lines_printed >= lines_per_page - 1 | |
1880 | && !pagination_disabled_for_command) | |
1881 | { | |
1882 | prompt_for_continue (); | |
1883 | did_paginate = true; | |
1884 | } | |
1885 | ||
1886 | /* Now output indentation and wrapped string. */ | |
1887 | if (wrap_column) | |
1888 | { | |
1889 | stream->puts (wrap_indent); | |
1890 | ||
1891 | /* Having finished inserting the wrapping we should | |
1892 | restore the style as it was at the WRAP_COLUMN. */ | |
1893 | if (stream->can_emit_style_escape ()) | |
1894 | emit_style_escape (wrap_style, stream); | |
1895 | ||
1896 | /* The WRAP_BUFFER will still contain content, and that | |
1897 | content might set some alternative style. Restore | |
1898 | APPLIED_STYLE as it was before we started wrapping, | |
1899 | this reflects the current style for the last character | |
1900 | in WRAP_BUFFER. */ | |
1901 | applied_style = save_style; | |
1902 | ||
1903 | /* FIXME, this strlen is what prevents wrap_indent from | |
1904 | containing tabs. However, if we recurse to print it | |
1905 | and count its chars, we risk trouble if wrap_indent is | |
1906 | longer than (the user settable) chars_per_line. | |
1907 | Note also that this can set chars_printed > chars_per_line | |
1908 | if we are printing a long string. */ | |
1909 | chars_printed = strlen (wrap_indent) | |
1910 | + (save_chars - wrap_column); | |
1911 | wrap_column = 0; /* And disable fancy wrap */ | |
1912 | } | |
1913 | else if (did_paginate && stream->can_emit_style_escape ()) | |
1914 | emit_style_escape (save_style, stream); | |
1915 | } | |
1916 | } | |
1917 | ||
1918 | if (*lineptr == '\n') | |
1919 | { | |
1920 | chars_printed = 0; | |
1921 | wrap_here ((char *) 0); /* Spit out chars, cancel | |
1922 | further wraps. */ | |
1923 | lines_printed++; | |
1924 | /* XXX: The ideal thing would be to call | |
1925 | 'stream->putc' here, but we can't because it | |
1926 | currently calls 'fputc_unfiltered', which ends up | |
1927 | calling us, which generates an infinite | |
1928 | recursion. */ | |
1929 | stream->puts ("\n"); | |
1930 | lineptr++; | |
1931 | } | |
1932 | } | |
1933 | ||
1934 | buffer_clearer.release (); | |
1935 | } | |
1936 | ||
1937 | void | |
1938 | fputs_filtered (const char *linebuffer, struct ui_file *stream) | |
1939 | { | |
1940 | fputs_maybe_filtered (linebuffer, stream, 1); | |
1941 | } | |
1942 | ||
1943 | void | |
1944 | fputs_unfiltered (const char *linebuffer, struct ui_file *stream) | |
1945 | { | |
1946 | fputs_maybe_filtered (linebuffer, stream, 0); | |
1947 | } | |
1948 | ||
1949 | /* See utils.h. */ | |
1950 | ||
1951 | void | |
1952 | fputs_styled (const char *linebuffer, const ui_file_style &style, | |
1953 | struct ui_file *stream) | |
1954 | { | |
1955 | set_output_style (stream, style); | |
1956 | fputs_maybe_filtered (linebuffer, stream, 1); | |
1957 | set_output_style (stream, ui_file_style ()); | |
1958 | } | |
1959 | ||
1960 | /* See utils.h. */ | |
1961 | ||
1962 | void | |
1963 | fputs_styled_unfiltered (const char *linebuffer, const ui_file_style &style, | |
1964 | struct ui_file *stream) | |
1965 | { | |
1966 | set_output_style (stream, style); | |
1967 | fputs_maybe_filtered (linebuffer, stream, 0); | |
1968 | set_output_style (stream, ui_file_style ()); | |
1969 | } | |
1970 | ||
1971 | /* See utils.h. */ | |
1972 | ||
1973 | void | |
1974 | fputs_highlighted (const char *str, const compiled_regex &highlight, | |
1975 | struct ui_file *stream) | |
1976 | { | |
1977 | regmatch_t pmatch; | |
1978 | ||
1979 | while (*str && highlight.exec (str, 1, &pmatch, 0) == 0) | |
1980 | { | |
1981 | size_t n_highlight = pmatch.rm_eo - pmatch.rm_so; | |
1982 | ||
1983 | /* Output the part before pmatch with current style. */ | |
1984 | while (pmatch.rm_so > 0) | |
1985 | { | |
1986 | fputc_filtered (*str, stream); | |
1987 | pmatch.rm_so--; | |
1988 | str++; | |
1989 | } | |
1990 | ||
1991 | /* Output pmatch with the highlight style. */ | |
1992 | set_output_style (stream, highlight_style.style ()); | |
1993 | while (n_highlight > 0) | |
1994 | { | |
1995 | fputc_filtered (*str, stream); | |
1996 | n_highlight--; | |
1997 | str++; | |
1998 | } | |
1999 | set_output_style (stream, ui_file_style ()); | |
2000 | } | |
2001 | ||
2002 | /* Output the trailing part of STR not matching HIGHLIGHT. */ | |
2003 | if (*str) | |
2004 | fputs_filtered (str, stream); | |
2005 | } | |
2006 | ||
2007 | int | |
2008 | putchar_unfiltered (int c) | |
2009 | { | |
2010 | return fputc_unfiltered (c, gdb_stdout); | |
2011 | } | |
2012 | ||
2013 | /* Write character C to gdb_stdout using GDB's paging mechanism and return C. | |
2014 | May return nonlocally. */ | |
2015 | ||
2016 | int | |
2017 | putchar_filtered (int c) | |
2018 | { | |
2019 | return fputc_filtered (c, gdb_stdout); | |
2020 | } | |
2021 | ||
2022 | int | |
2023 | fputc_unfiltered (int c, struct ui_file *stream) | |
2024 | { | |
2025 | char buf[2]; | |
2026 | ||
2027 | buf[0] = c; | |
2028 | buf[1] = 0; | |
2029 | fputs_unfiltered (buf, stream); | |
2030 | return c; | |
2031 | } | |
2032 | ||
2033 | int | |
2034 | fputc_filtered (int c, struct ui_file *stream) | |
2035 | { | |
2036 | char buf[2]; | |
2037 | ||
2038 | buf[0] = c; | |
2039 | buf[1] = 0; | |
2040 | fputs_filtered (buf, stream); | |
2041 | return c; | |
2042 | } | |
2043 | ||
2044 | /* puts_debug is like fputs_unfiltered, except it prints special | |
2045 | characters in printable fashion. */ | |
2046 | ||
2047 | void | |
2048 | puts_debug (char *prefix, char *string, char *suffix) | |
2049 | { | |
2050 | int ch; | |
2051 | ||
2052 | /* Print prefix and suffix after each line. */ | |
2053 | static int new_line = 1; | |
2054 | static int return_p = 0; | |
2055 | static const char *prev_prefix = ""; | |
2056 | static const char *prev_suffix = ""; | |
2057 | ||
2058 | if (*string == '\n') | |
2059 | return_p = 0; | |
2060 | ||
2061 | /* If the prefix is changing, print the previous suffix, a new line, | |
2062 | and the new prefix. */ | |
2063 | if ((return_p || (strcmp (prev_prefix, prefix) != 0)) && !new_line) | |
2064 | { | |
2065 | fputs_unfiltered (prev_suffix, gdb_stdlog); | |
2066 | fputs_unfiltered ("\n", gdb_stdlog); | |
2067 | fputs_unfiltered (prefix, gdb_stdlog); | |
2068 | } | |
2069 | ||
2070 | /* Print prefix if we printed a newline during the previous call. */ | |
2071 | if (new_line) | |
2072 | { | |
2073 | new_line = 0; | |
2074 | fputs_unfiltered (prefix, gdb_stdlog); | |
2075 | } | |
2076 | ||
2077 | prev_prefix = prefix; | |
2078 | prev_suffix = suffix; | |
2079 | ||
2080 | /* Output characters in a printable format. */ | |
2081 | while ((ch = *string++) != '\0') | |
2082 | { | |
2083 | switch (ch) | |
2084 | { | |
2085 | default: | |
2086 | if (gdb_isprint (ch)) | |
2087 | fputc_unfiltered (ch, gdb_stdlog); | |
2088 | ||
2089 | else | |
2090 | fprintf_unfiltered (gdb_stdlog, "\\x%02x", ch & 0xff); | |
2091 | break; | |
2092 | ||
2093 | case '\\': | |
2094 | fputs_unfiltered ("\\\\", gdb_stdlog); | |
2095 | break; | |
2096 | case '\b': | |
2097 | fputs_unfiltered ("\\b", gdb_stdlog); | |
2098 | break; | |
2099 | case '\f': | |
2100 | fputs_unfiltered ("\\f", gdb_stdlog); | |
2101 | break; | |
2102 | case '\n': | |
2103 | new_line = 1; | |
2104 | fputs_unfiltered ("\\n", gdb_stdlog); | |
2105 | break; | |
2106 | case '\r': | |
2107 | fputs_unfiltered ("\\r", gdb_stdlog); | |
2108 | break; | |
2109 | case '\t': | |
2110 | fputs_unfiltered ("\\t", gdb_stdlog); | |
2111 | break; | |
2112 | case '\v': | |
2113 | fputs_unfiltered ("\\v", gdb_stdlog); | |
2114 | break; | |
2115 | } | |
2116 | ||
2117 | return_p = ch == '\r'; | |
2118 | } | |
2119 | ||
2120 | /* Print suffix if we printed a newline. */ | |
2121 | if (new_line) | |
2122 | { | |
2123 | fputs_unfiltered (suffix, gdb_stdlog); | |
2124 | fputs_unfiltered ("\n", gdb_stdlog); | |
2125 | } | |
2126 | } | |
2127 | ||
2128 | ||
2129 | /* Print a variable number of ARGS using format FORMAT. If this | |
2130 | information is going to put the amount written (since the last call | |
2131 | to REINITIALIZE_MORE_FILTER or the last page break) over the page size, | |
2132 | call prompt_for_continue to get the users permission to continue. | |
2133 | ||
2134 | Unlike fprintf, this function does not return a value. | |
2135 | ||
2136 | We implement three variants, vfprintf (takes a vararg list and stream), | |
2137 | fprintf (takes a stream to write on), and printf (the usual). | |
2138 | ||
2139 | Note also that this may throw a quit (since prompt_for_continue may | |
2140 | do so). */ | |
2141 | ||
2142 | static void | |
2143 | vfprintf_maybe_filtered (struct ui_file *stream, const char *format, | |
2144 | va_list args, bool filter) | |
2145 | { | |
2146 | ui_out_flags flags = disallow_ui_out_field; | |
2147 | if (!filter) | |
2148 | flags |= unfiltered_output; | |
2149 | cli_ui_out (stream, flags).vmessage (applied_style, format, args); | |
2150 | } | |
2151 | ||
2152 | ||
2153 | void | |
2154 | vfprintf_filtered (struct ui_file *stream, const char *format, va_list args) | |
2155 | { | |
2156 | vfprintf_maybe_filtered (stream, format, args, true); | |
2157 | } | |
2158 | ||
2159 | void | |
2160 | vfprintf_unfiltered (struct ui_file *stream, const char *format, va_list args) | |
2161 | { | |
2162 | if (debug_timestamp && stream == gdb_stdlog) | |
2163 | { | |
2164 | static bool needs_timestamp = true; | |
2165 | ||
2166 | /* Print timestamp if previous print ended with a \n. */ | |
2167 | if (needs_timestamp) | |
2168 | { | |
2169 | using namespace std::chrono; | |
2170 | ||
2171 | steady_clock::time_point now = steady_clock::now (); | |
2172 | seconds s = duration_cast<seconds> (now.time_since_epoch ()); | |
2173 | microseconds us = duration_cast<microseconds> (now.time_since_epoch () - s); | |
2174 | std::string timestamp = string_printf ("%ld.%06ld ", | |
2175 | (long) s.count (), | |
2176 | (long) us.count ()); | |
2177 | fputs_unfiltered (timestamp.c_str (), stream); | |
2178 | } | |
2179 | ||
2180 | /* Print the message. */ | |
2181 | string_file sfile; | |
2182 | cli_ui_out (&sfile, 0).vmessage (ui_file_style (), format, args); | |
2183 | std::string linebuffer = std::move (sfile.string ()); | |
2184 | fputs_unfiltered (linebuffer.c_str (), stream); | |
2185 | ||
2186 | size_t len = linebuffer.length (); | |
2187 | needs_timestamp = (len > 0 && linebuffer[len - 1] == '\n'); | |
2188 | } | |
2189 | else | |
2190 | vfprintf_maybe_filtered (stream, format, args, false); | |
2191 | } | |
2192 | ||
2193 | void | |
2194 | vprintf_filtered (const char *format, va_list args) | |
2195 | { | |
2196 | vfprintf_filtered (gdb_stdout, format, args); | |
2197 | } | |
2198 | ||
2199 | void | |
2200 | vprintf_unfiltered (const char *format, va_list args) | |
2201 | { | |
2202 | vfprintf_unfiltered (gdb_stdout, format, args); | |
2203 | } | |
2204 | ||
2205 | void | |
2206 | fprintf_filtered (struct ui_file *stream, const char *format, ...) | |
2207 | { | |
2208 | va_list args; | |
2209 | ||
2210 | va_start (args, format); | |
2211 | vfprintf_filtered (stream, format, args); | |
2212 | va_end (args); | |
2213 | } | |
2214 | ||
2215 | void | |
2216 | fprintf_unfiltered (struct ui_file *stream, const char *format, ...) | |
2217 | { | |
2218 | va_list args; | |
2219 | ||
2220 | va_start (args, format); | |
2221 | vfprintf_unfiltered (stream, format, args); | |
2222 | va_end (args); | |
2223 | } | |
2224 | ||
2225 | /* See utils.h. */ | |
2226 | ||
2227 | void | |
2228 | fprintf_styled (struct ui_file *stream, const ui_file_style &style, | |
2229 | const char *format, ...) | |
2230 | { | |
2231 | va_list args; | |
2232 | ||
2233 | set_output_style (stream, style); | |
2234 | va_start (args, format); | |
2235 | vfprintf_filtered (stream, format, args); | |
2236 | va_end (args); | |
2237 | set_output_style (stream, ui_file_style ()); | |
2238 | } | |
2239 | ||
2240 | /* See utils.h. */ | |
2241 | ||
2242 | void | |
2243 | vfprintf_styled (struct ui_file *stream, const ui_file_style &style, | |
2244 | const char *format, va_list args) | |
2245 | { | |
2246 | set_output_style (stream, style); | |
2247 | vfprintf_filtered (stream, format, args); | |
2248 | set_output_style (stream, ui_file_style ()); | |
2249 | } | |
2250 | ||
2251 | /* See utils.h. */ | |
2252 | ||
2253 | void | |
2254 | vfprintf_styled_no_gdbfmt (struct ui_file *stream, const ui_file_style &style, | |
2255 | bool filter, const char *format, va_list args) | |
2256 | { | |
2257 | std::string str = string_vprintf (format, args); | |
2258 | if (!str.empty ()) | |
2259 | { | |
2260 | set_output_style (stream, style); | |
2261 | fputs_maybe_filtered (str.c_str (), stream, filter); | |
2262 | set_output_style (stream, ui_file_style ()); | |
2263 | } | |
2264 | } | |
2265 | ||
2266 | void | |
2267 | printf_filtered (const char *format, ...) | |
2268 | { | |
2269 | va_list args; | |
2270 | ||
2271 | va_start (args, format); | |
2272 | vfprintf_filtered (gdb_stdout, format, args); | |
2273 | va_end (args); | |
2274 | } | |
2275 | ||
2276 | ||
2277 | void | |
2278 | printf_unfiltered (const char *format, ...) | |
2279 | { | |
2280 | va_list args; | |
2281 | ||
2282 | va_start (args, format); | |
2283 | vfprintf_unfiltered (gdb_stdout, format, args); | |
2284 | va_end (args); | |
2285 | } | |
2286 | ||
2287 | /* Easy -- but watch out! | |
2288 | ||
2289 | This routine is *not* a replacement for puts()! puts() appends a newline. | |
2290 | This one doesn't, and had better not! */ | |
2291 | ||
2292 | void | |
2293 | puts_filtered (const char *string) | |
2294 | { | |
2295 | fputs_filtered (string, gdb_stdout); | |
2296 | } | |
2297 | ||
2298 | void | |
2299 | puts_unfiltered (const char *string) | |
2300 | { | |
2301 | fputs_unfiltered (string, gdb_stdout); | |
2302 | } | |
2303 | ||
2304 | /* Return a pointer to N spaces and a null. The pointer is good | |
2305 | until the next call to here. */ | |
2306 | char * | |
2307 | n_spaces (int n) | |
2308 | { | |
2309 | char *t; | |
2310 | static char *spaces = 0; | |
2311 | static int max_spaces = -1; | |
2312 | ||
2313 | if (n > max_spaces) | |
2314 | { | |
2315 | xfree (spaces); | |
2316 | spaces = (char *) xmalloc (n + 1); | |
2317 | for (t = spaces + n; t != spaces;) | |
2318 | *--t = ' '; | |
2319 | spaces[n] = '\0'; | |
2320 | max_spaces = n; | |
2321 | } | |
2322 | ||
2323 | return spaces + max_spaces - n; | |
2324 | } | |
2325 | ||
2326 | /* Print N spaces. */ | |
2327 | void | |
2328 | print_spaces_filtered (int n, struct ui_file *stream) | |
2329 | { | |
2330 | fputs_filtered (n_spaces (n), stream); | |
2331 | } | |
2332 | \f | |
2333 | /* C++/ObjC demangler stuff. */ | |
2334 | ||
2335 | /* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language | |
2336 | LANG, using demangling args ARG_MODE, and print it filtered to STREAM. | |
2337 | If the name is not mangled, or the language for the name is unknown, or | |
2338 | demangling is off, the name is printed in its "raw" form. */ | |
2339 | ||
2340 | void | |
2341 | fprintf_symbol_filtered (struct ui_file *stream, const char *name, | |
2342 | enum language lang, int arg_mode) | |
2343 | { | |
2344 | if (name != NULL) | |
2345 | { | |
2346 | /* If user wants to see raw output, no problem. */ | |
2347 | if (!demangle) | |
2348 | { | |
2349 | fputs_filtered (name, stream); | |
2350 | } | |
2351 | else | |
2352 | { | |
2353 | gdb::unique_xmalloc_ptr<char> demangled | |
2354 | = language_demangle (language_def (lang), name, arg_mode); | |
2355 | fputs_filtered (demangled ? demangled.get () : name, stream); | |
2356 | } | |
2357 | } | |
2358 | } | |
2359 | ||
2360 | /* True if CH is a character that can be part of a symbol name. I.e., | |
2361 | either a number, a letter, or a '_'. */ | |
2362 | ||
2363 | static bool | |
2364 | valid_identifier_name_char (int ch) | |
2365 | { | |
2366 | return (ISALNUM (ch) || ch == '_'); | |
2367 | } | |
2368 | ||
2369 | /* Skip to end of token, or to END, whatever comes first. Input is | |
2370 | assumed to be a C++ operator name. */ | |
2371 | ||
2372 | static const char * | |
2373 | cp_skip_operator_token (const char *token, const char *end) | |
2374 | { | |
2375 | const char *p = token; | |
2376 | while (p != end && !ISSPACE (*p) && *p != '(') | |
2377 | { | |
2378 | if (valid_identifier_name_char (*p)) | |
2379 | { | |
2380 | while (p != end && valid_identifier_name_char (*p)) | |
2381 | p++; | |
2382 | return p; | |
2383 | } | |
2384 | else | |
2385 | { | |
2386 | /* Note, ordered such that among ops that share a prefix, | |
2387 | longer comes first. This is so that the loop below can | |
2388 | bail on first match. */ | |
2389 | static const char *ops[] = | |
2390 | { | |
2391 | "[", | |
2392 | "]", | |
2393 | "~", | |
2394 | ",", | |
2395 | "-=", "--", "->", "-", | |
2396 | "+=", "++", "+", | |
2397 | "*=", "*", | |
2398 | "/=", "/", | |
2399 | "%=", "%", | |
2400 | "|=", "||", "|", | |
2401 | "&=", "&&", "&", | |
2402 | "^=", "^", | |
2403 | "!=", "!", | |
2404 | "<<=", "<=", "<<", "<", | |
2405 | ">>=", ">=", ">>", ">", | |
2406 | "==", "=", | |
2407 | }; | |
2408 | ||
2409 | for (const char *op : ops) | |
2410 | { | |
2411 | size_t oplen = strlen (op); | |
2412 | size_t lencmp = std::min<size_t> (oplen, end - p); | |
2413 | ||
2414 | if (strncmp (p, op, lencmp) == 0) | |
2415 | return p + lencmp; | |
2416 | } | |
2417 | /* Some unidentified character. Return it. */ | |
2418 | return p + 1; | |
2419 | } | |
2420 | } | |
2421 | ||
2422 | return p; | |
2423 | } | |
2424 | ||
2425 | /* Advance STRING1/STRING2 past whitespace. */ | |
2426 | ||
2427 | static void | |
2428 | skip_ws (const char *&string1, const char *&string2, const char *end_str2) | |
2429 | { | |
2430 | while (ISSPACE (*string1)) | |
2431 | string1++; | |
2432 | while (string2 < end_str2 && ISSPACE (*string2)) | |
2433 | string2++; | |
2434 | } | |
2435 | ||
2436 | /* True if STRING points at the start of a C++ operator name. START | |
2437 | is the start of the string that STRING points to, hence when | |
2438 | reading backwards, we must not read any character before START. */ | |
2439 | ||
2440 | static bool | |
2441 | cp_is_operator (const char *string, const char *start) | |
2442 | { | |
2443 | return ((string == start | |
2444 | || !valid_identifier_name_char (string[-1])) | |
2445 | && strncmp (string, CP_OPERATOR_STR, CP_OPERATOR_LEN) == 0 | |
2446 | && !valid_identifier_name_char (string[CP_OPERATOR_LEN])); | |
2447 | } | |
2448 | ||
2449 | /* If *NAME points at an ABI tag, skip it and return true. Otherwise | |
2450 | leave *NAME unmodified and return false. (see GCC's abi_tag | |
2451 | attribute), such names are demangled as e.g., | |
2452 | "function[abi:cxx11]()". */ | |
2453 | ||
2454 | static bool | |
2455 | skip_abi_tag (const char **name) | |
2456 | { | |
2457 | const char *p = *name; | |
2458 | ||
2459 | if (startswith (p, "[abi:")) | |
2460 | { | |
2461 | p += 5; | |
2462 | ||
2463 | while (valid_identifier_name_char (*p)) | |
2464 | p++; | |
2465 | ||
2466 | if (*p == ']') | |
2467 | { | |
2468 | p++; | |
2469 | *name = p; | |
2470 | return true; | |
2471 | } | |
2472 | } | |
2473 | return false; | |
2474 | } | |
2475 | ||
2476 | /* See utils.h. */ | |
2477 | ||
2478 | int | |
2479 | strncmp_iw_with_mode (const char *string1, const char *string2, | |
2480 | size_t string2_len, strncmp_iw_mode mode, | |
2481 | enum language language, | |
2482 | completion_match_for_lcd *match_for_lcd) | |
2483 | { | |
2484 | const char *string1_start = string1; | |
2485 | const char *end_str2 = string2 + string2_len; | |
2486 | bool skip_spaces = true; | |
2487 | bool have_colon_op = (language == language_cplus | |
2488 | || language == language_rust | |
2489 | || language == language_fortran); | |
2490 | ||
2491 | while (1) | |
2492 | { | |
2493 | if (skip_spaces | |
2494 | || ((ISSPACE (*string1) && !valid_identifier_name_char (*string2)) | |
2495 | || (ISSPACE (*string2) && !valid_identifier_name_char (*string1)))) | |
2496 | { | |
2497 | skip_ws (string1, string2, end_str2); | |
2498 | skip_spaces = false; | |
2499 | } | |
2500 | ||
2501 | /* Skip [abi:cxx11] tags in the symbol name if the lookup name | |
2502 | doesn't include them. E.g.: | |
2503 | ||
2504 | string1: function[abi:cxx1](int) | |
2505 | string2: function | |
2506 | ||
2507 | string1: function[abi:cxx1](int) | |
2508 | string2: function(int) | |
2509 | ||
2510 | string1: Struct[abi:cxx1]::function() | |
2511 | string2: Struct::function() | |
2512 | ||
2513 | string1: function(Struct[abi:cxx1], int) | |
2514 | string2: function(Struct, int) | |
2515 | */ | |
2516 | if (string2 == end_str2 | |
2517 | || (*string2 != '[' && !valid_identifier_name_char (*string2))) | |
2518 | { | |
2519 | const char *abi_start = string1; | |
2520 | ||
2521 | /* There can be more than one tag. */ | |
2522 | while (*string1 == '[' && skip_abi_tag (&string1)) | |
2523 | ; | |
2524 | ||
2525 | if (match_for_lcd != NULL && abi_start != string1) | |
2526 | match_for_lcd->mark_ignored_range (abi_start, string1); | |
2527 | ||
2528 | while (ISSPACE (*string1)) | |
2529 | string1++; | |
2530 | } | |
2531 | ||
2532 | if (*string1 == '\0' || string2 == end_str2) | |
2533 | break; | |
2534 | ||
2535 | /* Handle the :: operator. */ | |
2536 | if (have_colon_op && string1[0] == ':' && string1[1] == ':') | |
2537 | { | |
2538 | if (*string2 != ':') | |
2539 | return 1; | |
2540 | ||
2541 | string1++; | |
2542 | string2++; | |
2543 | ||
2544 | if (string2 == end_str2) | |
2545 | break; | |
2546 | ||
2547 | if (*string2 != ':') | |
2548 | return 1; | |
2549 | ||
2550 | string1++; | |
2551 | string2++; | |
2552 | ||
2553 | while (ISSPACE (*string1)) | |
2554 | string1++; | |
2555 | while (string2 < end_str2 && ISSPACE (*string2)) | |
2556 | string2++; | |
2557 | continue; | |
2558 | } | |
2559 | ||
2560 | /* Handle C++ user-defined operators. */ | |
2561 | else if (language == language_cplus | |
2562 | && *string1 == 'o') | |
2563 | { | |
2564 | if (cp_is_operator (string1, string1_start)) | |
2565 | { | |
2566 | /* An operator name in STRING1. Check STRING2. */ | |
2567 | size_t cmplen | |
2568 | = std::min<size_t> (CP_OPERATOR_LEN, end_str2 - string2); | |
2569 | if (strncmp (string1, string2, cmplen) != 0) | |
2570 | return 1; | |
2571 | ||
2572 | string1 += cmplen; | |
2573 | string2 += cmplen; | |
2574 | ||
2575 | if (string2 != end_str2) | |
2576 | { | |
2577 | /* Check for "operatorX" in STRING2. */ | |
2578 | if (valid_identifier_name_char (*string2)) | |
2579 | return 1; | |
2580 | ||
2581 | skip_ws (string1, string2, end_str2); | |
2582 | } | |
2583 | ||
2584 | /* Handle operator(). */ | |
2585 | if (*string1 == '(') | |
2586 | { | |
2587 | if (string2 == end_str2) | |
2588 | { | |
2589 | if (mode == strncmp_iw_mode::NORMAL) | |
2590 | return 0; | |
2591 | else | |
2592 | { | |
2593 | /* Don't break for the regular return at the | |
2594 | bottom, because "operator" should not | |
2595 | match "operator()", since this open | |
2596 | parentheses is not the parameter list | |
2597 | start. */ | |
2598 | return *string1 != '\0'; | |
2599 | } | |
2600 | } | |
2601 | ||
2602 | if (*string1 != *string2) | |
2603 | return 1; | |
2604 | ||
2605 | string1++; | |
2606 | string2++; | |
2607 | } | |
2608 | ||
2609 | while (1) | |
2610 | { | |
2611 | skip_ws (string1, string2, end_str2); | |
2612 | ||
2613 | /* Skip to end of token, or to END, whatever comes | |
2614 | first. */ | |
2615 | const char *end_str1 = string1 + strlen (string1); | |
2616 | const char *p1 = cp_skip_operator_token (string1, end_str1); | |
2617 | const char *p2 = cp_skip_operator_token (string2, end_str2); | |
2618 | ||
2619 | cmplen = std::min (p1 - string1, p2 - string2); | |
2620 | if (p2 == end_str2) | |
2621 | { | |
2622 | if (strncmp (string1, string2, cmplen) != 0) | |
2623 | return 1; | |
2624 | } | |
2625 | else | |
2626 | { | |
2627 | if (p1 - string1 != p2 - string2) | |
2628 | return 1; | |
2629 | if (strncmp (string1, string2, cmplen) != 0) | |
2630 | return 1; | |
2631 | } | |
2632 | ||
2633 | string1 += cmplen; | |
2634 | string2 += cmplen; | |
2635 | ||
2636 | if (*string1 == '\0' || string2 == end_str2) | |
2637 | break; | |
2638 | if (*string1 == '(' || *string2 == '(') | |
2639 | break; | |
2640 | } | |
2641 | ||
2642 | continue; | |
2643 | } | |
2644 | } | |
2645 | ||
2646 | if (case_sensitivity == case_sensitive_on && *string1 != *string2) | |
2647 | break; | |
2648 | if (case_sensitivity == case_sensitive_off | |
2649 | && (TOLOWER ((unsigned char) *string1) | |
2650 | != TOLOWER ((unsigned char) *string2))) | |
2651 | break; | |
2652 | ||
2653 | /* If we see any non-whitespace, non-identifier-name character | |
2654 | (any of "()<>*&" etc.), then skip spaces the next time | |
2655 | around. */ | |
2656 | if (!ISSPACE (*string1) && !valid_identifier_name_char (*string1)) | |
2657 | skip_spaces = true; | |
2658 | ||
2659 | string1++; | |
2660 | string2++; | |
2661 | } | |
2662 | ||
2663 | if (string2 == end_str2) | |
2664 | { | |
2665 | if (mode == strncmp_iw_mode::NORMAL) | |
2666 | { | |
2667 | /* Strip abi tag markers from the matched symbol name. | |
2668 | Usually the ABI marker will be found on function name | |
2669 | (automatically added because the function returns an | |
2670 | object marked with an ABI tag). However, it's also | |
2671 | possible to see a marker in one of the function | |
2672 | parameters, for example. | |
2673 | ||
2674 | string2 (lookup name): | |
2675 | func | |
2676 | symbol name: | |
2677 | function(some_struct[abi:cxx11], int) | |
2678 | ||
2679 | and for completion LCD computation we want to say that | |
2680 | the match was for: | |
2681 | function(some_struct, int) | |
2682 | */ | |
2683 | if (match_for_lcd != NULL) | |
2684 | { | |
2685 | while ((string1 = strstr (string1, "[abi:")) != NULL) | |
2686 | { | |
2687 | const char *abi_start = string1; | |
2688 | ||
2689 | /* There can be more than one tag. */ | |
2690 | while (skip_abi_tag (&string1) && *string1 == '[') | |
2691 | ; | |
2692 | ||
2693 | if (abi_start != string1) | |
2694 | match_for_lcd->mark_ignored_range (abi_start, string1); | |
2695 | } | |
2696 | } | |
2697 | ||
2698 | return 0; | |
2699 | } | |
2700 | else | |
2701 | return (*string1 != '\0' && *string1 != '('); | |
2702 | } | |
2703 | else | |
2704 | return 1; | |
2705 | } | |
2706 | ||
2707 | /* See utils.h. */ | |
2708 | ||
2709 | int | |
2710 | strncmp_iw (const char *string1, const char *string2, size_t string2_len) | |
2711 | { | |
2712 | return strncmp_iw_with_mode (string1, string2, string2_len, | |
2713 | strncmp_iw_mode::NORMAL, language_minimal); | |
2714 | } | |
2715 | ||
2716 | /* See utils.h. */ | |
2717 | ||
2718 | int | |
2719 | strcmp_iw (const char *string1, const char *string2) | |
2720 | { | |
2721 | return strncmp_iw_with_mode (string1, string2, strlen (string2), | |
2722 | strncmp_iw_mode::MATCH_PARAMS, language_minimal); | |
2723 | } | |
2724 | ||
2725 | /* This is like strcmp except that it ignores whitespace and treats | |
2726 | '(' as the first non-NULL character in terms of ordering. Like | |
2727 | strcmp (and unlike strcmp_iw), it returns negative if STRING1 < | |
2728 | STRING2, 0 if STRING2 = STRING2, and positive if STRING1 > STRING2 | |
2729 | according to that ordering. | |
2730 | ||
2731 | If a list is sorted according to this function and if you want to | |
2732 | find names in the list that match some fixed NAME according to | |
2733 | strcmp_iw(LIST_ELT, NAME), then the place to start looking is right | |
2734 | where this function would put NAME. | |
2735 | ||
2736 | This function must be neutral to the CASE_SENSITIVITY setting as the user | |
2737 | may choose it during later lookup. Therefore this function always sorts | |
2738 | primarily case-insensitively and secondarily case-sensitively. | |
2739 | ||
2740 | Here are some examples of why using strcmp to sort is a bad idea: | |
2741 | ||
2742 | Whitespace example: | |
2743 | ||
2744 | Say your partial symtab contains: "foo<char *>", "goo". Then, if | |
2745 | we try to do a search for "foo<char*>", strcmp will locate this | |
2746 | after "foo<char *>" and before "goo". Then lookup_partial_symbol | |
2747 | will start looking at strings beginning with "goo", and will never | |
2748 | see the correct match of "foo<char *>". | |
2749 | ||
2750 | Parenthesis example: | |
2751 | ||
2752 | In practice, this is less like to be an issue, but I'll give it a | |
2753 | shot. Let's assume that '$' is a legitimate character to occur in | |
2754 | symbols. (Which may well even be the case on some systems.) Then | |
2755 | say that the partial symbol table contains "foo$" and "foo(int)". | |
2756 | strcmp will put them in this order, since '$' < '('. Now, if the | |
2757 | user searches for "foo", then strcmp will sort "foo" before "foo$". | |
2758 | Then lookup_partial_symbol will notice that strcmp_iw("foo$", | |
2759 | "foo") is false, so it won't proceed to the actual match of | |
2760 | "foo(int)" with "foo". */ | |
2761 | ||
2762 | int | |
2763 | strcmp_iw_ordered (const char *string1, const char *string2) | |
2764 | { | |
2765 | const char *saved_string1 = string1, *saved_string2 = string2; | |
2766 | enum case_sensitivity case_pass = case_sensitive_off; | |
2767 | ||
2768 | for (;;) | |
2769 | { | |
2770 | /* C1 and C2 are valid only if *string1 != '\0' && *string2 != '\0'. | |
2771 | Provide stub characters if we are already at the end of one of the | |
2772 | strings. */ | |
2773 | char c1 = 'X', c2 = 'X'; | |
2774 | ||
2775 | while (*string1 != '\0' && *string2 != '\0') | |
2776 | { | |
2777 | while (ISSPACE (*string1)) | |
2778 | string1++; | |
2779 | while (ISSPACE (*string2)) | |
2780 | string2++; | |
2781 | ||
2782 | switch (case_pass) | |
2783 | { | |
2784 | case case_sensitive_off: | |
2785 | c1 = TOLOWER ((unsigned char) *string1); | |
2786 | c2 = TOLOWER ((unsigned char) *string2); | |
2787 | break; | |
2788 | case case_sensitive_on: | |
2789 | c1 = *string1; | |
2790 | c2 = *string2; | |
2791 | break; | |
2792 | } | |
2793 | if (c1 != c2) | |
2794 | break; | |
2795 | ||
2796 | if (*string1 != '\0') | |
2797 | { | |
2798 | string1++; | |
2799 | string2++; | |
2800 | } | |
2801 | } | |
2802 | ||
2803 | switch (*string1) | |
2804 | { | |
2805 | /* Characters are non-equal unless they're both '\0'; we want to | |
2806 | make sure we get the comparison right according to our | |
2807 | comparison in the cases where one of them is '\0' or '('. */ | |
2808 | case '\0': | |
2809 | if (*string2 == '\0') | |
2810 | break; | |
2811 | else | |
2812 | return -1; | |
2813 | case '(': | |
2814 | if (*string2 == '\0') | |
2815 | return 1; | |
2816 | else | |
2817 | return -1; | |
2818 | default: | |
2819 | if (*string2 == '\0' || *string2 == '(') | |
2820 | return 1; | |
2821 | else if (c1 > c2) | |
2822 | return 1; | |
2823 | else if (c1 < c2) | |
2824 | return -1; | |
2825 | /* PASSTHRU */ | |
2826 | } | |
2827 | ||
2828 | if (case_pass == case_sensitive_on) | |
2829 | return 0; | |
2830 | ||
2831 | /* Otherwise the strings were equal in case insensitive way, make | |
2832 | a more fine grained comparison in a case sensitive way. */ | |
2833 | ||
2834 | case_pass = case_sensitive_on; | |
2835 | string1 = saved_string1; | |
2836 | string2 = saved_string2; | |
2837 | } | |
2838 | } | |
2839 | ||
2840 | /* See utils.h. */ | |
2841 | ||
2842 | bool | |
2843 | streq (const char *lhs, const char *rhs) | |
2844 | { | |
2845 | return !strcmp (lhs, rhs); | |
2846 | } | |
2847 | ||
2848 | \f | |
2849 | ||
2850 | /* | |
2851 | ** subset_compare() | |
2852 | ** Answer whether string_to_compare is a full or partial match to | |
2853 | ** template_string. The partial match must be in sequence starting | |
2854 | ** at index 0. | |
2855 | */ | |
2856 | int | |
2857 | subset_compare (const char *string_to_compare, const char *template_string) | |
2858 | { | |
2859 | int match; | |
2860 | ||
2861 | if (template_string != NULL && string_to_compare != NULL | |
2862 | && strlen (string_to_compare) <= strlen (template_string)) | |
2863 | match = | |
2864 | (startswith (template_string, string_to_compare)); | |
2865 | else | |
2866 | match = 0; | |
2867 | return match; | |
2868 | } | |
2869 | ||
2870 | static void | |
2871 | show_debug_timestamp (struct ui_file *file, int from_tty, | |
2872 | struct cmd_list_element *c, const char *value) | |
2873 | { | |
2874 | fprintf_filtered (file, _("Timestamping debugging messages is %s.\n"), | |
2875 | value); | |
2876 | } | |
2877 | \f | |
2878 | ||
2879 | /* See utils.h. */ | |
2880 | ||
2881 | CORE_ADDR | |
2882 | address_significant (gdbarch *gdbarch, CORE_ADDR addr) | |
2883 | { | |
2884 | /* Clear insignificant bits of a target address and sign extend resulting | |
2885 | address, avoiding shifts larger or equal than the width of a CORE_ADDR. | |
2886 | The local variable ADDR_BIT stops the compiler reporting a shift overflow | |
2887 | when it won't occur. Skip updating of target address if current target | |
2888 | has not set gdbarch significant_addr_bit. */ | |
2889 | int addr_bit = gdbarch_significant_addr_bit (gdbarch); | |
2890 | ||
2891 | if (addr_bit && (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))) | |
2892 | { | |
2893 | CORE_ADDR sign = (CORE_ADDR) 1 << (addr_bit - 1); | |
2894 | addr &= ((CORE_ADDR) 1 << addr_bit) - 1; | |
2895 | addr = (addr ^ sign) - sign; | |
2896 | } | |
2897 | ||
2898 | return addr; | |
2899 | } | |
2900 | ||
2901 | const char * | |
2902 | paddress (struct gdbarch *gdbarch, CORE_ADDR addr) | |
2903 | { | |
2904 | /* Truncate address to the size of a target address, avoiding shifts | |
2905 | larger or equal than the width of a CORE_ADDR. The local | |
2906 | variable ADDR_BIT stops the compiler reporting a shift overflow | |
2907 | when it won't occur. */ | |
2908 | /* NOTE: This assumes that the significant address information is | |
2909 | kept in the least significant bits of ADDR - the upper bits were | |
2910 | either zero or sign extended. Should gdbarch_address_to_pointer or | |
2911 | some ADDRESS_TO_PRINTABLE() be used to do the conversion? */ | |
2912 | ||
2913 | int addr_bit = gdbarch_addr_bit (gdbarch); | |
2914 | ||
2915 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) | |
2916 | addr &= ((CORE_ADDR) 1 << addr_bit) - 1; | |
2917 | return hex_string (addr); | |
2918 | } | |
2919 | ||
2920 | /* This function is described in "defs.h". */ | |
2921 | ||
2922 | const char * | |
2923 | print_core_address (struct gdbarch *gdbarch, CORE_ADDR address) | |
2924 | { | |
2925 | int addr_bit = gdbarch_addr_bit (gdbarch); | |
2926 | ||
2927 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) | |
2928 | address &= ((CORE_ADDR) 1 << addr_bit) - 1; | |
2929 | ||
2930 | /* FIXME: cagney/2002-05-03: Need local_address_string() function | |
2931 | that returns the language localized string formatted to a width | |
2932 | based on gdbarch_addr_bit. */ | |
2933 | if (addr_bit <= 32) | |
2934 | return hex_string_custom (address, 8); | |
2935 | else | |
2936 | return hex_string_custom (address, 16); | |
2937 | } | |
2938 | ||
2939 | /* Callback hash_f for htab_create_alloc or htab_create_alloc_ex. */ | |
2940 | ||
2941 | hashval_t | |
2942 | core_addr_hash (const void *ap) | |
2943 | { | |
2944 | const CORE_ADDR *addrp = (const CORE_ADDR *) ap; | |
2945 | ||
2946 | return *addrp; | |
2947 | } | |
2948 | ||
2949 | /* Callback eq_f for htab_create_alloc or htab_create_alloc_ex. */ | |
2950 | ||
2951 | int | |
2952 | core_addr_eq (const void *ap, const void *bp) | |
2953 | { | |
2954 | const CORE_ADDR *addr_ap = (const CORE_ADDR *) ap; | |
2955 | const CORE_ADDR *addr_bp = (const CORE_ADDR *) bp; | |
2956 | ||
2957 | return *addr_ap == *addr_bp; | |
2958 | } | |
2959 | ||
2960 | /* Convert a string back into a CORE_ADDR. */ | |
2961 | CORE_ADDR | |
2962 | string_to_core_addr (const char *my_string) | |
2963 | { | |
2964 | CORE_ADDR addr = 0; | |
2965 | ||
2966 | if (my_string[0] == '0' && TOLOWER (my_string[1]) == 'x') | |
2967 | { | |
2968 | /* Assume that it is in hex. */ | |
2969 | int i; | |
2970 | ||
2971 | for (i = 2; my_string[i] != '\0'; i++) | |
2972 | { | |
2973 | if (ISDIGIT (my_string[i])) | |
2974 | addr = (my_string[i] - '0') + (addr * 16); | |
2975 | else if (ISXDIGIT (my_string[i])) | |
2976 | addr = (TOLOWER (my_string[i]) - 'a' + 0xa) + (addr * 16); | |
2977 | else | |
2978 | error (_("invalid hex \"%s\""), my_string); | |
2979 | } | |
2980 | } | |
2981 | else | |
2982 | { | |
2983 | /* Assume that it is in decimal. */ | |
2984 | int i; | |
2985 | ||
2986 | for (i = 0; my_string[i] != '\0'; i++) | |
2987 | { | |
2988 | if (ISDIGIT (my_string[i])) | |
2989 | addr = (my_string[i] - '0') + (addr * 10); | |
2990 | else | |
2991 | error (_("invalid decimal \"%s\""), my_string); | |
2992 | } | |
2993 | } | |
2994 | ||
2995 | return addr; | |
2996 | } | |
2997 | ||
2998 | #if GDB_SELF_TEST | |
2999 | ||
3000 | static void | |
3001 | gdb_realpath_check_trailer (const char *input, const char *trailer) | |
3002 | { | |
3003 | gdb::unique_xmalloc_ptr<char> result = gdb_realpath (input); | |
3004 | ||
3005 | size_t len = strlen (result.get ()); | |
3006 | size_t trail_len = strlen (trailer); | |
3007 | ||
3008 | SELF_CHECK (len >= trail_len | |
3009 | && strcmp (result.get () + len - trail_len, trailer) == 0); | |
3010 | } | |
3011 | ||
3012 | static void | |
3013 | gdb_realpath_tests () | |
3014 | { | |
3015 | /* A file which contains a directory prefix. */ | |
3016 | gdb_realpath_check_trailer ("./xfullpath.exp", "/xfullpath.exp"); | |
3017 | /* A file which contains a directory prefix. */ | |
3018 | gdb_realpath_check_trailer ("../../defs.h", "/defs.h"); | |
3019 | /* A one-character filename. */ | |
3020 | gdb_realpath_check_trailer ("./a", "/a"); | |
3021 | /* A file in the root directory. */ | |
3022 | gdb_realpath_check_trailer ("/root_file_which_should_exist", | |
3023 | "/root_file_which_should_exist"); | |
3024 | /* A file which does not have a directory prefix. */ | |
3025 | gdb_realpath_check_trailer ("xfullpath.exp", "xfullpath.exp"); | |
3026 | /* A one-char filename without any directory prefix. */ | |
3027 | gdb_realpath_check_trailer ("a", "a"); | |
3028 | /* An empty filename. */ | |
3029 | gdb_realpath_check_trailer ("", ""); | |
3030 | } | |
3031 | ||
3032 | /* Test the gdb_argv::as_array_view method. */ | |
3033 | ||
3034 | static void | |
3035 | gdb_argv_as_array_view_test () | |
3036 | { | |
3037 | { | |
3038 | gdb_argv argv; | |
3039 | ||
3040 | gdb::array_view<char *> view = argv.as_array_view (); | |
3041 | ||
3042 | SELF_CHECK (view.data () == nullptr); | |
3043 | SELF_CHECK (view.size () == 0); | |
3044 | } | |
3045 | { | |
3046 | gdb_argv argv ("une bonne 50"); | |
3047 | ||
3048 | gdb::array_view<char *> view = argv.as_array_view (); | |
3049 | ||
3050 | SELF_CHECK (view.size () == 3); | |
3051 | SELF_CHECK (strcmp (view[0], "une") == 0); | |
3052 | SELF_CHECK (strcmp (view[1], "bonne") == 0); | |
3053 | SELF_CHECK (strcmp (view[2], "50") == 0); | |
3054 | } | |
3055 | } | |
3056 | ||
3057 | #endif /* GDB_SELF_TEST */ | |
3058 | ||
3059 | /* Allocation function for the libiberty hash table which uses an | |
3060 | obstack. The obstack is passed as DATA. */ | |
3061 | ||
3062 | void * | |
3063 | hashtab_obstack_allocate (void *data, size_t size, size_t count) | |
3064 | { | |
3065 | size_t total = size * count; | |
3066 | void *ptr = obstack_alloc ((struct obstack *) data, total); | |
3067 | ||
3068 | memset (ptr, 0, total); | |
3069 | return ptr; | |
3070 | } | |
3071 | ||
3072 | /* Trivial deallocation function for the libiberty splay tree and hash | |
3073 | table - don't deallocate anything. Rely on later deletion of the | |
3074 | obstack. DATA will be the obstack, although it is not needed | |
3075 | here. */ | |
3076 | ||
3077 | void | |
3078 | dummy_obstack_deallocate (void *object, void *data) | |
3079 | { | |
3080 | return; | |
3081 | } | |
3082 | ||
3083 | /* Simple, portable version of dirname that does not modify its | |
3084 | argument. */ | |
3085 | ||
3086 | std::string | |
3087 | ldirname (const char *filename) | |
3088 | { | |
3089 | std::string dirname; | |
3090 | const char *base = lbasename (filename); | |
3091 | ||
3092 | while (base > filename && IS_DIR_SEPARATOR (base[-1])) | |
3093 | --base; | |
3094 | ||
3095 | if (base == filename) | |
3096 | return dirname; | |
3097 | ||
3098 | dirname = std::string (filename, base - filename); | |
3099 | ||
3100 | /* On DOS based file systems, convert "d:foo" to "d:.", so that we | |
3101 | create "d:./bar" later instead of the (different) "d:/bar". */ | |
3102 | if (base - filename == 2 && IS_ABSOLUTE_PATH (base) | |
3103 | && !IS_DIR_SEPARATOR (filename[0])) | |
3104 | dirname[base++ - filename] = '.'; | |
3105 | ||
3106 | return dirname; | |
3107 | } | |
3108 | ||
3109 | /* See utils.h. */ | |
3110 | ||
3111 | void | |
3112 | gdb_argv::reset (const char *s) | |
3113 | { | |
3114 | char **argv = buildargv (s); | |
3115 | ||
3116 | freeargv (m_argv); | |
3117 | m_argv = argv; | |
3118 | } | |
3119 | ||
3120 | #define AMBIGUOUS_MESS1 ".\nMatching formats:" | |
3121 | #define AMBIGUOUS_MESS2 \ | |
3122 | ".\nUse \"set gnutarget format-name\" to specify the format." | |
3123 | ||
3124 | std::string | |
3125 | gdb_bfd_errmsg (bfd_error_type error_tag, char **matching) | |
3126 | { | |
3127 | char **p; | |
3128 | ||
3129 | /* Check if errmsg just need simple return. */ | |
3130 | if (error_tag != bfd_error_file_ambiguously_recognized || matching == NULL) | |
3131 | return bfd_errmsg (error_tag); | |
3132 | ||
3133 | std::string ret (bfd_errmsg (error_tag)); | |
3134 | ret += AMBIGUOUS_MESS1; | |
3135 | ||
3136 | for (p = matching; *p; p++) | |
3137 | { | |
3138 | ret += " "; | |
3139 | ret += *p; | |
3140 | } | |
3141 | ret += AMBIGUOUS_MESS2; | |
3142 | ||
3143 | xfree (matching); | |
3144 | ||
3145 | return ret; | |
3146 | } | |
3147 | ||
3148 | /* Return ARGS parsed as a valid pid, or throw an error. */ | |
3149 | ||
3150 | int | |
3151 | parse_pid_to_attach (const char *args) | |
3152 | { | |
3153 | unsigned long pid; | |
3154 | char *dummy; | |
3155 | ||
3156 | if (!args) | |
3157 | error_no_arg (_("process-id to attach")); | |
3158 | ||
3159 | dummy = (char *) args; | |
3160 | pid = strtoul (args, &dummy, 0); | |
3161 | /* Some targets don't set errno on errors, grrr! */ | |
3162 | if ((pid == 0 && dummy == args) || dummy != &args[strlen (args)]) | |
3163 | error (_("Illegal process-id: %s."), args); | |
3164 | ||
3165 | return pid; | |
3166 | } | |
3167 | ||
3168 | /* Substitute all occurrences of string FROM by string TO in *STRINGP. *STRINGP | |
3169 | must come from xrealloc-compatible allocator and it may be updated. FROM | |
3170 | needs to be delimited by IS_DIR_SEPARATOR or DIRNAME_SEPARATOR (or be | |
3171 | located at the start or end of *STRINGP. */ | |
3172 | ||
3173 | void | |
3174 | substitute_path_component (char **stringp, const char *from, const char *to) | |
3175 | { | |
3176 | char *string = *stringp, *s; | |
3177 | const size_t from_len = strlen (from); | |
3178 | const size_t to_len = strlen (to); | |
3179 | ||
3180 | for (s = string;;) | |
3181 | { | |
3182 | s = strstr (s, from); | |
3183 | if (s == NULL) | |
3184 | break; | |
3185 | ||
3186 | if ((s == string || IS_DIR_SEPARATOR (s[-1]) | |
3187 | || s[-1] == DIRNAME_SEPARATOR) | |
3188 | && (s[from_len] == '\0' || IS_DIR_SEPARATOR (s[from_len]) | |
3189 | || s[from_len] == DIRNAME_SEPARATOR)) | |
3190 | { | |
3191 | char *string_new; | |
3192 | ||
3193 | string_new | |
3194 | = (char *) xrealloc (string, (strlen (string) + to_len + 1)); | |
3195 | ||
3196 | /* Relocate the current S pointer. */ | |
3197 | s = s - string + string_new; | |
3198 | string = string_new; | |
3199 | ||
3200 | /* Replace from by to. */ | |
3201 | memmove (&s[to_len], &s[from_len], strlen (&s[from_len]) + 1); | |
3202 | memcpy (s, to, to_len); | |
3203 | ||
3204 | s += to_len; | |
3205 | } | |
3206 | else | |
3207 | s++; | |
3208 | } | |
3209 | ||
3210 | *stringp = string; | |
3211 | } | |
3212 | ||
3213 | #ifdef HAVE_WAITPID | |
3214 | ||
3215 | #ifdef SIGALRM | |
3216 | ||
3217 | /* SIGALRM handler for waitpid_with_timeout. */ | |
3218 | ||
3219 | static void | |
3220 | sigalrm_handler (int signo) | |
3221 | { | |
3222 | /* Nothing to do. */ | |
3223 | } | |
3224 | ||
3225 | #endif | |
3226 | ||
3227 | /* Wrapper to wait for child PID to die with TIMEOUT. | |
3228 | TIMEOUT is the time to stop waiting in seconds. | |
3229 | If TIMEOUT is zero, pass WNOHANG to waitpid. | |
3230 | Returns PID if it was successfully waited for, otherwise -1. | |
3231 | ||
3232 | Timeouts are currently implemented with alarm and SIGALRM. | |
3233 | If the host does not support them, this waits "forever". | |
3234 | It would be odd though for a host to have waitpid and not SIGALRM. */ | |
3235 | ||
3236 | pid_t | |
3237 | wait_to_die_with_timeout (pid_t pid, int *status, int timeout) | |
3238 | { | |
3239 | pid_t waitpid_result; | |
3240 | ||
3241 | gdb_assert (pid > 0); | |
3242 | gdb_assert (timeout >= 0); | |
3243 | ||
3244 | if (timeout > 0) | |
3245 | { | |
3246 | #ifdef SIGALRM | |
3247 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
3248 | struct sigaction sa, old_sa; | |
3249 | ||
3250 | sa.sa_handler = sigalrm_handler; | |
3251 | sigemptyset (&sa.sa_mask); | |
3252 | sa.sa_flags = 0; | |
3253 | sigaction (SIGALRM, &sa, &old_sa); | |
3254 | #else | |
3255 | sighandler_t ofunc; | |
3256 | ||
3257 | ofunc = signal (SIGALRM, sigalrm_handler); | |
3258 | #endif | |
3259 | ||
3260 | alarm (timeout); | |
3261 | #endif | |
3262 | ||
3263 | waitpid_result = waitpid (pid, status, 0); | |
3264 | ||
3265 | #ifdef SIGALRM | |
3266 | alarm (0); | |
3267 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
3268 | sigaction (SIGALRM, &old_sa, NULL); | |
3269 | #else | |
3270 | signal (SIGALRM, ofunc); | |
3271 | #endif | |
3272 | #endif | |
3273 | } | |
3274 | else | |
3275 | waitpid_result = waitpid (pid, status, WNOHANG); | |
3276 | ||
3277 | if (waitpid_result == pid) | |
3278 | return pid; | |
3279 | else | |
3280 | return -1; | |
3281 | } | |
3282 | ||
3283 | #endif /* HAVE_WAITPID */ | |
3284 | ||
3285 | /* Provide fnmatch compatible function for FNM_FILE_NAME matching of host files. | |
3286 | Both FNM_FILE_NAME and FNM_NOESCAPE must be set in FLAGS. | |
3287 | ||
3288 | It handles correctly HAVE_DOS_BASED_FILE_SYSTEM and | |
3289 | HAVE_CASE_INSENSITIVE_FILE_SYSTEM. */ | |
3290 | ||
3291 | int | |
3292 | gdb_filename_fnmatch (const char *pattern, const char *string, int flags) | |
3293 | { | |
3294 | gdb_assert ((flags & FNM_FILE_NAME) != 0); | |
3295 | ||
3296 | /* It is unclear how '\' escaping vs. directory separator should coexist. */ | |
3297 | gdb_assert ((flags & FNM_NOESCAPE) != 0); | |
3298 | ||
3299 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
3300 | { | |
3301 | char *pattern_slash, *string_slash; | |
3302 | ||
3303 | /* Replace '\' by '/' in both strings. */ | |
3304 | ||
3305 | pattern_slash = (char *) alloca (strlen (pattern) + 1); | |
3306 | strcpy (pattern_slash, pattern); | |
3307 | pattern = pattern_slash; | |
3308 | for (; *pattern_slash != 0; pattern_slash++) | |
3309 | if (IS_DIR_SEPARATOR (*pattern_slash)) | |
3310 | *pattern_slash = '/'; | |
3311 | ||
3312 | string_slash = (char *) alloca (strlen (string) + 1); | |
3313 | strcpy (string_slash, string); | |
3314 | string = string_slash; | |
3315 | for (; *string_slash != 0; string_slash++) | |
3316 | if (IS_DIR_SEPARATOR (*string_slash)) | |
3317 | *string_slash = '/'; | |
3318 | } | |
3319 | #endif /* HAVE_DOS_BASED_FILE_SYSTEM */ | |
3320 | ||
3321 | #ifdef HAVE_CASE_INSENSITIVE_FILE_SYSTEM | |
3322 | flags |= FNM_CASEFOLD; | |
3323 | #endif /* HAVE_CASE_INSENSITIVE_FILE_SYSTEM */ | |
3324 | ||
3325 | return fnmatch (pattern, string, flags); | |
3326 | } | |
3327 | ||
3328 | /* Return the number of path elements in PATH. | |
3329 | / = 1 | |
3330 | /foo = 2 | |
3331 | /foo/ = 2 | |
3332 | foo/bar = 2 | |
3333 | foo/ = 1 */ | |
3334 | ||
3335 | int | |
3336 | count_path_elements (const char *path) | |
3337 | { | |
3338 | int count = 0; | |
3339 | const char *p = path; | |
3340 | ||
3341 | if (HAS_DRIVE_SPEC (p)) | |
3342 | { | |
3343 | p = STRIP_DRIVE_SPEC (p); | |
3344 | ++count; | |
3345 | } | |
3346 | ||
3347 | while (*p != '\0') | |
3348 | { | |
3349 | if (IS_DIR_SEPARATOR (*p)) | |
3350 | ++count; | |
3351 | ++p; | |
3352 | } | |
3353 | ||
3354 | /* Backup one if last character is /, unless it's the only one. */ | |
3355 | if (p > path + 1 && IS_DIR_SEPARATOR (p[-1])) | |
3356 | --count; | |
3357 | ||
3358 | /* Add one for the file name, if present. */ | |
3359 | if (p > path && !IS_DIR_SEPARATOR (p[-1])) | |
3360 | ++count; | |
3361 | ||
3362 | return count; | |
3363 | } | |
3364 | ||
3365 | /* Remove N leading path elements from PATH. | |
3366 | N must be non-negative. | |
3367 | If PATH has more than N path elements then return NULL. | |
3368 | If PATH has exactly N path elements then return "". | |
3369 | See count_path_elements for a description of how we do the counting. */ | |
3370 | ||
3371 | const char * | |
3372 | strip_leading_path_elements (const char *path, int n) | |
3373 | { | |
3374 | int i = 0; | |
3375 | const char *p = path; | |
3376 | ||
3377 | gdb_assert (n >= 0); | |
3378 | ||
3379 | if (n == 0) | |
3380 | return p; | |
3381 | ||
3382 | if (HAS_DRIVE_SPEC (p)) | |
3383 | { | |
3384 | p = STRIP_DRIVE_SPEC (p); | |
3385 | ++i; | |
3386 | } | |
3387 | ||
3388 | while (i < n) | |
3389 | { | |
3390 | while (*p != '\0' && !IS_DIR_SEPARATOR (*p)) | |
3391 | ++p; | |
3392 | if (*p == '\0') | |
3393 | { | |
3394 | if (i + 1 == n) | |
3395 | return ""; | |
3396 | return NULL; | |
3397 | } | |
3398 | ++p; | |
3399 | ++i; | |
3400 | } | |
3401 | ||
3402 | return p; | |
3403 | } | |
3404 | ||
3405 | /* See utils.h. */ | |
3406 | ||
3407 | void | |
3408 | copy_bitwise (gdb_byte *dest, ULONGEST dest_offset, | |
3409 | const gdb_byte *source, ULONGEST source_offset, | |
3410 | ULONGEST nbits, int bits_big_endian) | |
3411 | { | |
3412 | unsigned int buf, avail; | |
3413 | ||
3414 | if (nbits == 0) | |
3415 | return; | |
3416 | ||
3417 | if (bits_big_endian) | |
3418 | { | |
3419 | /* Start from the end, then work backwards. */ | |
3420 | dest_offset += nbits - 1; | |
3421 | dest += dest_offset / 8; | |
3422 | dest_offset = 7 - dest_offset % 8; | |
3423 | source_offset += nbits - 1; | |
3424 | source += source_offset / 8; | |
3425 | source_offset = 7 - source_offset % 8; | |
3426 | } | |
3427 | else | |
3428 | { | |
3429 | dest += dest_offset / 8; | |
3430 | dest_offset %= 8; | |
3431 | source += source_offset / 8; | |
3432 | source_offset %= 8; | |
3433 | } | |
3434 | ||
3435 | /* Fill BUF with DEST_OFFSET bits from the destination and 8 - | |
3436 | SOURCE_OFFSET bits from the source. */ | |
3437 | buf = *(bits_big_endian ? source-- : source++) >> source_offset; | |
3438 | buf <<= dest_offset; | |
3439 | buf |= *dest & ((1 << dest_offset) - 1); | |
3440 | ||
3441 | /* NBITS: bits yet to be written; AVAIL: BUF's fill level. */ | |
3442 | nbits += dest_offset; | |
3443 | avail = dest_offset + 8 - source_offset; | |
3444 | ||
3445 | /* Flush 8 bits from BUF, if appropriate. */ | |
3446 | if (nbits >= 8 && avail >= 8) | |
3447 | { | |
3448 | *(bits_big_endian ? dest-- : dest++) = buf; | |
3449 | buf >>= 8; | |
3450 | avail -= 8; | |
3451 | nbits -= 8; | |
3452 | } | |
3453 | ||
3454 | /* Copy the middle part. */ | |
3455 | if (nbits >= 8) | |
3456 | { | |
3457 | size_t len = nbits / 8; | |
3458 | ||
3459 | /* Use a faster method for byte-aligned copies. */ | |
3460 | if (avail == 0) | |
3461 | { | |
3462 | if (bits_big_endian) | |
3463 | { | |
3464 | dest -= len; | |
3465 | source -= len; | |
3466 | memcpy (dest + 1, source + 1, len); | |
3467 | } | |
3468 | else | |
3469 | { | |
3470 | memcpy (dest, source, len); | |
3471 | dest += len; | |
3472 | source += len; | |
3473 | } | |
3474 | } | |
3475 | else | |
3476 | { | |
3477 | while (len--) | |
3478 | { | |
3479 | buf |= *(bits_big_endian ? source-- : source++) << avail; | |
3480 | *(bits_big_endian ? dest-- : dest++) = buf; | |
3481 | buf >>= 8; | |
3482 | } | |
3483 | } | |
3484 | nbits %= 8; | |
3485 | } | |
3486 | ||
3487 | /* Write the last byte. */ | |
3488 | if (nbits) | |
3489 | { | |
3490 | if (avail < nbits) | |
3491 | buf |= *source << avail; | |
3492 | ||
3493 | buf &= (1 << nbits) - 1; | |
3494 | *dest = (*dest & (~0U << nbits)) | buf; | |
3495 | } | |
3496 | } | |
3497 | ||
3498 | void _initialize_utils (); | |
3499 | void | |
3500 | _initialize_utils () | |
3501 | { | |
3502 | add_setshow_uinteger_cmd ("width", class_support, &chars_per_line, _("\ | |
3503 | Set number of characters where GDB should wrap lines of its output."), _("\ | |
3504 | Show number of characters where GDB should wrap lines of its output."), _("\ | |
3505 | This affects where GDB wraps its output to fit the screen width.\n\ | |
3506 | Setting this to \"unlimited\" or zero prevents GDB from wrapping its output."), | |
3507 | set_width_command, | |
3508 | show_chars_per_line, | |
3509 | &setlist, &showlist); | |
3510 | ||
3511 | add_setshow_uinteger_cmd ("height", class_support, &lines_per_page, _("\ | |
3512 | Set number of lines in a page for GDB output pagination."), _("\ | |
3513 | Show number of lines in a page for GDB output pagination."), _("\ | |
3514 | This affects the number of lines after which GDB will pause\n\ | |
3515 | its output and ask you whether to continue.\n\ | |
3516 | Setting this to \"unlimited\" or zero causes GDB never pause during output."), | |
3517 | set_height_command, | |
3518 | show_lines_per_page, | |
3519 | &setlist, &showlist); | |
3520 | ||
3521 | add_setshow_boolean_cmd ("pagination", class_support, | |
3522 | &pagination_enabled, _("\ | |
3523 | Set state of GDB output pagination."), _("\ | |
3524 | Show state of GDB output pagination."), _("\ | |
3525 | When pagination is ON, GDB pauses at end of each screenful of\n\ | |
3526 | its output and asks you whether to continue.\n\ | |
3527 | Turning pagination off is an alternative to \"set height unlimited\"."), | |
3528 | NULL, | |
3529 | show_pagination_enabled, | |
3530 | &setlist, &showlist); | |
3531 | ||
3532 | add_setshow_boolean_cmd ("sevenbit-strings", class_support, | |
3533 | &sevenbit_strings, _("\ | |
3534 | Set printing of 8-bit characters in strings as \\nnn."), _("\ | |
3535 | Show printing of 8-bit characters in strings as \\nnn."), NULL, | |
3536 | NULL, | |
3537 | show_sevenbit_strings, | |
3538 | &setprintlist, &showprintlist); | |
3539 | ||
3540 | add_setshow_boolean_cmd ("timestamp", class_maintenance, | |
3541 | &debug_timestamp, _("\ | |
3542 | Set timestamping of debugging messages."), _("\ | |
3543 | Show timestamping of debugging messages."), _("\ | |
3544 | When set, debugging messages will be marked with seconds and microseconds."), | |
3545 | NULL, | |
3546 | show_debug_timestamp, | |
3547 | &setdebuglist, &showdebuglist); | |
3548 | ||
3549 | add_internal_problem_command (&internal_error_problem); | |
3550 | add_internal_problem_command (&internal_warning_problem); | |
3551 | add_internal_problem_command (&demangler_warning_problem); | |
3552 | ||
3553 | #if GDB_SELF_TEST | |
3554 | selftests::register_test ("gdb_realpath", gdb_realpath_tests); | |
3555 | selftests::register_test ("gdb_argv_array_view", gdb_argv_as_array_view_test); | |
3556 | #endif | |
3557 | } |