1 /* General utility routines for GDB, the GNU debugger.
3 Copyright (C) 1986-2017 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
23 #include "event-top.h"
24 #include "gdbthread.h"
27 #ifdef HAVE_SYS_RESOURCE_H
28 #include <sys/resource.h>
29 #endif /* HAVE_SYS_RESOURCE_H */
32 #include "tui/tui.h" /* For tui_get_command_dimension. */
44 #include "gdb-demangle.h"
45 #include "expression.h"
49 #include "filenames.h"
51 #include "gdb_obstack.h"
57 #include "inferior.h" /* for signed_pointer_to_address */
59 #include "gdb_curses.h"
61 #include "readline/readline.h"
65 #include "gdb_usleep.h"
67 #include "gdb_regex.h"
68 #include "job-control.h"
71 extern PTR malloc (); /* ARI: PTR */
73 #if !HAVE_DECL_REALLOC
74 extern PTR realloc (); /* ARI: PTR */
80 void (*deprecated_error_begin_hook) (void);
82 /* Prototypes for local functions */
84 static void vfprintf_maybe_filtered (struct ui_file *, const char *,
85 va_list, int) ATTRIBUTE_PRINTF (2, 0);
87 static void fputs_maybe_filtered (const char *, struct ui_file *, int);
89 static void prompt_for_continue (void);
91 static void set_screen_size (void);
92 static void set_width (void);
94 /* Time spent in prompt_for_continue in the currently executing command
95 waiting for user to respond.
96 Initialized in make_command_stats_cleanup.
97 Modified in prompt_for_continue and defaulted_query.
98 Used in report_command_stats. */
100 static std::chrono::steady_clock::duration prompt_for_continue_wait_time;
102 /* A flag indicating whether to timestamp debugging messages. */
104 static int debug_timestamp = 0;
106 /* Nonzero means that strings with character values >0x7F should be printed
107 as octal escapes. Zero means just print the value (e.g. it's an
108 international character, and the terminal or window can cope.) */
110 int sevenbit_strings = 0;
112 show_sevenbit_strings (struct ui_file *file, int from_tty,
113 struct cmd_list_element *c, const char *value)
115 fprintf_filtered (file, _("Printing of 8-bit characters "
116 "in strings as \\nnn is %s.\n"),
120 /* String to be printed before warning messages, if any. */
122 const char *warning_pre_print = "\nwarning: ";
124 int pagination_enabled = 1;
126 show_pagination_enabled (struct ui_file *file, int from_tty,
127 struct cmd_list_element *c, const char *value)
129 fprintf_filtered (file, _("State of pagination is %s.\n"), value);
133 /* Cleanup utilities.
135 These are not defined in cleanups.c (nor declared in cleanups.h)
136 because while they use the "cleanup API" they are not part of the
139 /* Helper function for make_cleanup_ui_out_redirect_pop. */
142 do_ui_out_redirect_pop (void *arg)
144 struct ui_out *uiout = (struct ui_out *) arg;
146 uiout->redirect (NULL);
149 /* Return a new cleanup that pops the last redirection by ui_out_redirect
150 with NULL parameter. */
153 make_cleanup_ui_out_redirect_pop (struct ui_out *uiout)
155 return make_cleanup (do_ui_out_redirect_pop, uiout);
159 do_free_section_addr_info (void *arg)
161 free_section_addr_info ((struct section_addr_info *) arg);
165 make_cleanup_free_section_addr_info (struct section_addr_info *addrs)
167 return make_cleanup (do_free_section_addr_info, addrs);
170 struct restore_integer_closure
177 restore_integer (void *p)
179 struct restore_integer_closure *closure
180 = (struct restore_integer_closure *) p;
182 *(closure->variable) = closure->value;
185 /* Remember the current value of *VARIABLE and make it restored when
186 the cleanup is run. */
189 make_cleanup_restore_integer (int *variable)
191 struct restore_integer_closure *c = XNEW (struct restore_integer_closure);
193 c->variable = variable;
194 c->value = *variable;
196 return make_cleanup_dtor (restore_integer, (void *) c, xfree);
199 /* Remember the current value of *VARIABLE and make it restored when
200 the cleanup is run. */
203 make_cleanup_restore_uinteger (unsigned int *variable)
205 return make_cleanup_restore_integer ((int *) variable);
208 /* Helper for make_cleanup_unpush_target. */
211 do_unpush_target (void *arg)
213 struct target_ops *ops = (struct target_ops *) arg;
218 /* Return a new cleanup that unpushes OPS. */
221 make_cleanup_unpush_target (struct target_ops *ops)
223 return make_cleanup (do_unpush_target, ops);
226 /* Helper for make_cleanup_value_free_to_mark. */
229 do_value_free_to_mark (void *value)
231 value_free_to_mark ((struct value *) value);
234 /* Free all values allocated since MARK was obtained by value_mark
235 (except for those released) when the cleanup is run. */
238 make_cleanup_value_free_to_mark (struct value *mark)
240 return make_cleanup (do_value_free_to_mark, mark);
243 /* Helper for make_cleanup_value_free. */
246 do_value_free (void *value)
248 value_free ((struct value *) value);
254 make_cleanup_value_free (struct value *value)
256 return make_cleanup (do_value_free, value);
259 /* Helper function for make_cleanup_clear_parser_state. */
262 do_clear_parser_state (void *ptr)
264 struct parser_state **p = (struct parser_state **) ptr;
269 /* Clean (i.e., set to NULL) the parser state variable P. */
272 make_cleanup_clear_parser_state (struct parser_state **p)
274 return make_cleanup (do_clear_parser_state, (void *) p);
277 /* This function is useful for cleanups.
281 old_chain = make_cleanup (free_current_contents, &foo);
283 to arrange to free the object thus allocated. */
286 free_current_contents (void *ptr)
288 void **location = (void **) ptr;
290 if (location == NULL)
291 internal_error (__FILE__, __LINE__,
292 _("free_current_contents: NULL pointer"));
293 if (*location != NULL)
302 /* Print a warning message. The first argument STRING is the warning
303 message, used as an fprintf format string, the second is the
304 va_list of arguments for that string. A warning is unfiltered (not
305 paginated) so that the user does not need to page through each
306 screen full of warnings when there are lots of them. */
309 vwarning (const char *string, va_list args)
311 if (deprecated_warning_hook)
312 (*deprecated_warning_hook) (string, args);
315 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
317 if (target_supports_terminal_ours ())
319 make_cleanup_restore_target_terminal ();
320 target_terminal_ours_for_output ();
322 if (filtered_printing_initialized ())
323 wrap_here (""); /* Force out any buffered output. */
324 gdb_flush (gdb_stdout);
325 if (warning_pre_print)
326 fputs_unfiltered (warning_pre_print, gdb_stderr);
327 vfprintf_unfiltered (gdb_stderr, string, args);
328 fprintf_unfiltered (gdb_stderr, "\n");
330 do_cleanups (old_chain);
334 /* Print an error message and return to command level.
335 The first argument STRING is the error message, used as a fprintf string,
336 and the remaining args are passed as arguments to it. */
339 verror (const char *string, va_list args)
341 throw_verror (GENERIC_ERROR, string, args);
345 error_stream (const string_file &stream)
347 error (("%s"), stream.c_str ());
350 /* Emit a message and abort. */
352 static void ATTRIBUTE_NORETURN
353 abort_with_message (const char *msg)
355 if (gdb_stderr == NULL)
358 fputs_unfiltered (msg, gdb_stderr);
360 abort (); /* NOTE: GDB has only three calls to abort(). */
363 /* Dump core trying to increase the core soft limit to hard limit first. */
368 #ifdef HAVE_SETRLIMIT
369 struct rlimit rlim = { RLIM_INFINITY, RLIM_INFINITY };
371 setrlimit (RLIMIT_CORE, &rlim);
372 #endif /* HAVE_SETRLIMIT */
374 abort (); /* NOTE: GDB has only three calls to abort(). */
377 /* Check whether GDB will be able to dump core using the dump_core
378 function. Returns zero if GDB cannot or should not dump core.
379 If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected.
380 If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */
383 can_dump_core (enum resource_limit_kind limit_kind)
385 #ifdef HAVE_GETRLIMIT
388 /* Be quiet and assume we can dump if an error is returned. */
389 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
395 if (rlim.rlim_cur == 0)
399 if (rlim.rlim_max == 0)
402 #endif /* HAVE_GETRLIMIT */
407 /* Print a warning that we cannot dump core. */
410 warn_cant_dump_core (const char *reason)
412 fprintf_unfiltered (gdb_stderr,
413 _("%s\nUnable to dump core, use `ulimit -c"
414 " unlimited' before executing GDB next time.\n"),
418 /* Check whether GDB will be able to dump core using the dump_core
419 function, and print a warning if we cannot. */
422 can_dump_core_warn (enum resource_limit_kind limit_kind,
425 int core_dump_allowed = can_dump_core (limit_kind);
427 if (!core_dump_allowed)
428 warn_cant_dump_core (reason);
430 return core_dump_allowed;
433 /* Allow the user to configure the debugger behavior with respect to
434 what to do when an internal problem is detected. */
436 const char internal_problem_ask[] = "ask";
437 const char internal_problem_yes[] = "yes";
438 const char internal_problem_no[] = "no";
439 static const char *const internal_problem_modes[] =
441 internal_problem_ask,
442 internal_problem_yes,
447 /* Print a message reporting an internal error/warning. Ask the user
448 if they want to continue, dump core, or just exit. Return
449 something to indicate a quit. */
451 struct internal_problem
454 int user_settable_should_quit;
455 const char *should_quit;
456 int user_settable_should_dump_core;
457 const char *should_dump_core;
460 /* Report a problem, internal to GDB, to the user. Once the problem
461 has been reported, and assuming GDB didn't quit, the caller can
462 either allow execution to resume or throw an error. */
464 static void ATTRIBUTE_PRINTF (4, 0)
465 internal_vproblem (struct internal_problem *problem,
466 const char *file, int line, const char *fmt, va_list ap)
472 struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
474 /* Don't allow infinite error/warning recursion. */
476 static char msg[] = "Recursive internal problem.\n";
485 abort_with_message (msg);
488 /* Newer GLIBC versions put the warn_unused_result attribute
489 on write, but this is one of those rare cases where
490 ignoring the return value is correct. Casting to (void)
491 does not fix this problem. This is the solution suggested
492 at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509. */
493 if (write (STDERR_FILENO, msg, sizeof (msg)) != sizeof (msg))
494 abort (); /* NOTE: GDB has only three calls to abort(). */
499 /* Create a string containing the full error/warning message. Need
500 to call query with this full string, as otherwize the reason
501 (error/warning) and question become separated. Format using a
502 style similar to a compiler error message. Include extra detail
503 so that the user knows that they are living on the edge. */
507 msg = xstrvprintf (fmt, ap);
508 reason = xstrprintf ("%s:%d: %s: %s\n"
509 "A problem internal to GDB has been detected,\n"
510 "further debugging may prove unreliable.",
511 file, line, problem->name, msg);
513 make_cleanup (xfree, reason);
516 /* Fall back to abort_with_message if gdb_stderr is not set up. */
517 if (gdb_stderr == NULL)
519 fputs (reason, stderr);
520 abort_with_message ("\n");
523 /* Try to get the message out and at the start of a new line. */
524 if (target_supports_terminal_ours ())
526 make_cleanup_restore_target_terminal ();
527 target_terminal_ours_for_output ();
529 if (filtered_printing_initialized ())
532 /* Emit the message unless query will emit it below. */
533 if (problem->should_quit != internal_problem_ask
535 || !filtered_printing_initialized ())
536 fprintf_unfiltered (gdb_stderr, "%s\n", reason);
538 if (problem->should_quit == internal_problem_ask)
540 /* Default (yes/batch case) is to quit GDB. When in batch mode
541 this lessens the likelihood of GDB going into an infinite
543 if (!confirm || !filtered_printing_initialized ())
546 quit_p = query (_("%s\nQuit this debugging session? "), reason);
548 else if (problem->should_quit == internal_problem_yes)
550 else if (problem->should_quit == internal_problem_no)
553 internal_error (__FILE__, __LINE__, _("bad switch"));
555 fputs_unfiltered (_("\nThis is a bug, please report it."), gdb_stderr);
556 if (REPORT_BUGS_TO[0])
557 fprintf_unfiltered (gdb_stderr, _(" For instructions, see:\n%s."),
559 fputs_unfiltered ("\n\n", gdb_stderr);
561 if (problem->should_dump_core == internal_problem_ask)
563 if (!can_dump_core_warn (LIMIT_MAX, reason))
565 else if (!filtered_printing_initialized ())
569 /* Default (yes/batch case) is to dump core. This leaves a GDB
570 `dropping' so that it is easier to see that something went
572 dump_core_p = query (_("%s\nCreate a core file of GDB? "), reason);
575 else if (problem->should_dump_core == internal_problem_yes)
576 dump_core_p = can_dump_core_warn (LIMIT_MAX, reason);
577 else if (problem->should_dump_core == internal_problem_no)
580 internal_error (__FILE__, __LINE__, _("bad switch"));
593 #ifdef HAVE_WORKING_FORK
601 do_cleanups (cleanup);
604 static struct internal_problem internal_error_problem = {
605 "internal-error", 1, internal_problem_ask, 1, internal_problem_ask
609 internal_verror (const char *file, int line, const char *fmt, va_list ap)
611 internal_vproblem (&internal_error_problem, file, line, fmt, ap);
612 throw_quit (_("Command aborted."));
615 static struct internal_problem internal_warning_problem = {
616 "internal-warning", 1, internal_problem_ask, 1, internal_problem_ask
620 internal_vwarning (const char *file, int line, const char *fmt, va_list ap)
622 internal_vproblem (&internal_warning_problem, file, line, fmt, ap);
625 static struct internal_problem demangler_warning_problem = {
626 "demangler-warning", 1, internal_problem_ask, 0, internal_problem_no
630 demangler_vwarning (const char *file, int line, const char *fmt, va_list ap)
632 internal_vproblem (&demangler_warning_problem, file, line, fmt, ap);
636 demangler_warning (const char *file, int line, const char *string, ...)
640 va_start (ap, string);
641 demangler_vwarning (file, line, string, ap);
645 /* Dummy functions to keep add_prefix_cmd happy. */
648 set_internal_problem_cmd (char *args, int from_tty)
653 show_internal_problem_cmd (char *args, int from_tty)
657 /* When GDB reports an internal problem (error or warning) it gives
658 the user the opportunity to quit GDB and/or create a core file of
659 the current debug session. This function registers a few commands
660 that make it possible to specify that GDB should always or never
661 quit or create a core file, without asking. The commands look
664 maint set PROBLEM-NAME quit ask|yes|no
665 maint show PROBLEM-NAME quit
666 maint set PROBLEM-NAME corefile ask|yes|no
667 maint show PROBLEM-NAME corefile
669 Where PROBLEM-NAME is currently "internal-error" or
670 "internal-warning". */
673 add_internal_problem_command (struct internal_problem *problem)
675 struct cmd_list_element **set_cmd_list;
676 struct cmd_list_element **show_cmd_list;
680 set_cmd_list = XNEW (struct cmd_list_element *);
681 show_cmd_list = XNEW (struct cmd_list_element *);
682 *set_cmd_list = NULL;
683 *show_cmd_list = NULL;
685 set_doc = xstrprintf (_("Configure what GDB does when %s is detected."),
688 show_doc = xstrprintf (_("Show what GDB does when %s is detected."),
691 add_prefix_cmd ((char*) problem->name,
692 class_maintenance, set_internal_problem_cmd, set_doc,
694 concat ("maintenance set ", problem->name, " ",
696 0/*allow-unknown*/, &maintenance_set_cmdlist);
698 add_prefix_cmd ((char*) problem->name,
699 class_maintenance, show_internal_problem_cmd, show_doc,
701 concat ("maintenance show ", problem->name, " ",
703 0/*allow-unknown*/, &maintenance_show_cmdlist);
705 if (problem->user_settable_should_quit)
707 set_doc = xstrprintf (_("Set whether GDB should quit "
708 "when an %s is detected"),
710 show_doc = xstrprintf (_("Show whether GDB will quit "
711 "when an %s is detected"),
713 add_setshow_enum_cmd ("quit", class_maintenance,
714 internal_problem_modes,
715 &problem->should_quit,
728 if (problem->user_settable_should_dump_core)
730 set_doc = xstrprintf (_("Set whether GDB should create a core "
731 "file of GDB when %s is detected"),
733 show_doc = xstrprintf (_("Show whether GDB will create a core "
734 "file of GDB when %s is detected"),
736 add_setshow_enum_cmd ("corefile", class_maintenance,
737 internal_problem_modes,
738 &problem->should_dump_core,
752 /* Return a newly allocated string, containing the PREFIX followed
753 by the system error message for errno (separated by a colon).
755 The result must be deallocated after use. */
758 perror_string (const char *prefix)
763 err = safe_strerror (errno);
764 combined = (char *) xmalloc (strlen (err) + strlen (prefix) + 3);
765 strcpy (combined, prefix);
766 strcat (combined, ": ");
767 strcat (combined, err);
772 /* Print the system error message for errno, and also mention STRING
773 as the file name for which the error was encountered. Use ERRCODE
774 for the thrown exception. Then return to command level. */
777 throw_perror_with_name (enum errors errcode, const char *string)
781 combined = perror_string (string);
782 make_cleanup (xfree, combined);
784 /* I understand setting these is a matter of taste. Still, some people
785 may clear errno but not know about bfd_error. Doing this here is not
787 bfd_set_error (bfd_error_no_error);
790 throw_error (errcode, _("%s."), combined);
793 /* See throw_perror_with_name, ERRCODE defaults here to GENERIC_ERROR. */
796 perror_with_name (const char *string)
798 throw_perror_with_name (GENERIC_ERROR, string);
801 /* Same as perror_with_name except that it prints a warning instead
802 of throwing an error. */
805 perror_warning_with_name (const char *string)
809 combined = perror_string (string);
810 warning (_("%s"), combined);
814 /* Print the system error message for ERRCODE, and also mention STRING
815 as the file name for which the error was encountered. */
818 print_sys_errmsg (const char *string, int errcode)
823 err = safe_strerror (errcode);
824 combined = (char *) alloca (strlen (err) + strlen (string) + 3);
825 strcpy (combined, string);
826 strcat (combined, ": ");
827 strcat (combined, err);
829 /* We want anything which was printed on stdout to come out first, before
831 gdb_flush (gdb_stdout);
832 fprintf_unfiltered (gdb_stderr, "%s.\n", combined);
835 /* Control C eventually causes this to be called, at a convenient time. */
840 struct ui *ui = current_ui;
842 if (sync_quit_force_run)
844 sync_quit_force_run = 0;
845 quit_force (NULL, 0);
849 /* No steenking SIGINT will ever be coming our way when the
850 program is resumed. Don't lie. */
854 /* If there is no terminal switching for this target, then we can't
855 possibly get screwed by the lack of job control. */
856 || !target_supports_terminal_ours ())
859 throw_quit ("Quit (expect signal SIGINT when the program is resumed)");
868 if (sync_quit_force_run)
873 if (deprecated_interactive_hook)
874 deprecated_interactive_hook ();
878 /* Called when a memory allocation fails, with the number of bytes of
879 memory requested in SIZE. */
882 malloc_failure (long size)
886 internal_error (__FILE__, __LINE__,
887 _("virtual memory exhausted: can't allocate %ld bytes."),
892 internal_error (__FILE__, __LINE__, _("virtual memory exhausted."));
896 /* My replacement for the read system call.
897 Used like `read' but keeps going if `read' returns too soon. */
900 myread (int desc, char *addr, int len)
907 val = read (desc, addr, len);
919 print_spaces (int n, struct ui_file *file)
921 fputs_unfiltered (n_spaces (n), file);
924 /* Print a host address. */
927 gdb_print_host_address_1 (const void *addr, struct ui_file *stream)
929 fprintf_filtered (stream, "%s", host_address_to_string (addr));
935 make_hex_string (const gdb_byte *data, size_t length)
937 char *result = (char *) xmalloc (length * 2 + 1);
942 for (i = 0; i < length; ++i)
943 p += xsnprintf (p, 3, "%02x", data[i]);
950 /* A cleanup that simply calls ui_unregister_input_event_handler. */
953 ui_unregister_input_event_handler_cleanup (void *ui)
955 ui_unregister_input_event_handler ((struct ui *) ui);
958 /* Set up to handle input. */
960 static struct cleanup *
961 prepare_to_handle_input (void)
963 struct cleanup *old_chain;
965 old_chain = make_cleanup_restore_target_terminal ();
966 target_terminal_ours ();
968 ui_register_input_event_handler (current_ui);
969 if (current_ui->prompt_state == PROMPT_BLOCKED)
970 make_cleanup (ui_unregister_input_event_handler_cleanup, current_ui);
972 make_cleanup_override_quit_handler (default_quit_handler);
979 /* This function supports the query, nquery, and yquery functions.
980 Ask user a y-or-n question and return 0 if answer is no, 1 if
981 answer is yes, or default the answer to the specified default
982 (for yquery or nquery). DEFCHAR may be 'y' or 'n' to provide a
983 default answer, or '\0' for no default.
984 CTLSTR is the control string and should end in "? ". It should
985 not say how to answer, because we do that.
986 ARGS are the arguments passed along with the CTLSTR argument to
989 static int ATTRIBUTE_PRINTF (1, 0)
990 defaulted_query (const char *ctlstr, const char defchar, va_list args)
995 char def_answer, not_def_answer;
996 const char *y_string, *n_string;
997 char *question, *prompt;
998 struct cleanup *old_chain;
1000 /* Set up according to which answer is the default. */
1001 if (defchar == '\0')
1005 not_def_answer = 'N';
1009 else if (defchar == 'y')
1013 not_def_answer = 'N';
1021 not_def_answer = 'Y';
1026 /* Automatically answer the default value if the user did not want
1027 prompts or the command was issued with the server prefix. */
1028 if (!confirm || server_command)
1031 /* If input isn't coming from the user directly, just say what
1032 question we're asking, and then answer the default automatically. This
1033 way, important error messages don't get lost when talking to GDB
1035 if (current_ui->instream != current_ui->stdin_stream
1036 || !input_interactive_p (current_ui)
1037 /* Restrict queries to the main UI. */
1038 || current_ui != main_ui)
1040 old_chain = make_cleanup_restore_target_terminal ();
1042 target_terminal_ours_for_output ();
1044 vfprintf_filtered (gdb_stdout, ctlstr, args);
1046 printf_filtered (_("(%s or %s) [answered %c; "
1047 "input not from terminal]\n"),
1048 y_string, n_string, def_answer);
1049 gdb_flush (gdb_stdout);
1051 do_cleanups (old_chain);
1055 if (deprecated_query_hook)
1059 old_chain = make_cleanup_restore_target_terminal ();
1060 res = deprecated_query_hook (ctlstr, args);
1061 do_cleanups (old_chain);
1065 /* Format the question outside of the loop, to avoid reusing args. */
1066 question = xstrvprintf (ctlstr, args);
1067 old_chain = make_cleanup (xfree, question);
1068 prompt = xstrprintf (_("%s%s(%s or %s) %s"),
1069 annotation_level > 1 ? "\n\032\032pre-query\n" : "",
1070 question, y_string, n_string,
1071 annotation_level > 1 ? "\n\032\032query\n" : "");
1072 make_cleanup (xfree, prompt);
1074 /* Used to add duration we waited for user to respond to
1075 prompt_for_continue_wait_time. */
1076 using namespace std::chrono;
1077 steady_clock::time_point prompt_started = steady_clock::now ();
1079 prepare_to_handle_input ();
1083 char *response, answer;
1085 gdb_flush (gdb_stdout);
1086 response = gdb_readline_wrapper (prompt);
1088 if (response == NULL) /* C-d */
1090 printf_filtered ("EOF [assumed %c]\n", def_answer);
1095 answer = response[0];
1100 /* Check answer. For the non-default, the user must specify
1101 the non-default explicitly. */
1102 if (answer == not_def_answer)
1104 retval = !def_value;
1107 /* Otherwise, if a default was specified, the user may either
1108 specify the required input or have it default by entering
1110 if (answer == def_answer
1111 || (defchar != '\0' && answer == '\0'))
1116 /* Invalid entries are not defaulted and require another selection. */
1117 printf_filtered (_("Please answer %s or %s.\n"),
1118 y_string, n_string);
1121 /* Add time spend in this routine to prompt_for_continue_wait_time. */
1122 prompt_for_continue_wait_time += steady_clock::now () - prompt_started;
1124 if (annotation_level > 1)
1125 printf_filtered (("\n\032\032post-query\n"));
1126 do_cleanups (old_chain);
1131 /* Ask user a y-or-n question and return 0 if answer is no, 1 if
1132 answer is yes, or 0 if answer is defaulted.
1133 Takes three args which are given to printf to print the question.
1134 The first, a control string, should end in "? ".
1135 It should not say how to answer, because we do that. */
1138 nquery (const char *ctlstr, ...)
1143 va_start (args, ctlstr);
1144 ret = defaulted_query (ctlstr, 'n', args);
1149 /* Ask user a y-or-n question and return 0 if answer is no, 1 if
1150 answer is yes, or 1 if answer is defaulted.
1151 Takes three args which are given to printf to print the question.
1152 The first, a control string, should end in "? ".
1153 It should not say how to answer, because we do that. */
1156 yquery (const char *ctlstr, ...)
1161 va_start (args, ctlstr);
1162 ret = defaulted_query (ctlstr, 'y', args);
1167 /* Ask user a y-or-n question and return 1 iff answer is yes.
1168 Takes three args which are given to printf to print the question.
1169 The first, a control string, should end in "? ".
1170 It should not say how to answer, because we do that. */
1173 query (const char *ctlstr, ...)
1178 va_start (args, ctlstr);
1179 ret = defaulted_query (ctlstr, '\0', args);
1184 /* A helper for parse_escape that converts a host character to a
1185 target character. C is the host character. If conversion is
1186 possible, then the target character is stored in *TARGET_C and the
1187 function returns 1. Otherwise, the function returns 0. */
1190 host_char_to_target (struct gdbarch *gdbarch, int c, int *target_c)
1195 auto_obstack host_data;
1197 convert_between_encodings (target_charset (gdbarch), host_charset (),
1198 (gdb_byte *) &the_char, 1, 1,
1199 &host_data, translit_none);
1201 if (obstack_object_size (&host_data) == 1)
1204 *target_c = *(char *) obstack_base (&host_data);
1210 /* Parse a C escape sequence. STRING_PTR points to a variable
1211 containing a pointer to the string to parse. That pointer
1212 should point to the character after the \. That pointer
1213 is updated past the characters we use. The value of the
1214 escape sequence is returned.
1216 A negative value means the sequence \ newline was seen,
1217 which is supposed to be equivalent to nothing at all.
1219 If \ is followed by a null character, we return a negative
1220 value and leave the string pointer pointing at the null character.
1222 If \ is followed by 000, we return 0 and leave the string pointer
1223 after the zeros. A value of 0 does not mean end of string. */
1226 parse_escape (struct gdbarch *gdbarch, const char **string_ptr)
1228 int target_char = -2; /* Initialize to avoid GCC warnings. */
1229 int c = *(*string_ptr)++;
1248 int i = host_hex_value (c);
1253 if (isdigit (c) && c != '8' && c != '9')
1257 i += host_hex_value (c);
1293 if (!host_char_to_target (gdbarch, c, &target_char))
1294 error (_("The escape sequence `\\%c' is equivalent to plain `%c',"
1295 " which has no equivalent\nin the `%s' character set."),
1296 c, c, target_charset (gdbarch));
1300 /* Print the character C on STREAM as part of the contents of a literal
1301 string whose delimiter is QUOTER. Note that this routine should only
1302 be called for printing things which are independent of the language
1303 of the program being debugged.
1305 printchar will normally escape backslashes and instances of QUOTER. If
1306 QUOTER is 0, printchar won't escape backslashes or any quoting character.
1307 As a side effect, if you pass the backslash character as the QUOTER,
1308 printchar will escape backslashes as usual, but not any other quoting
1312 printchar (int c, void (*do_fputs) (const char *, struct ui_file *),
1313 void (*do_fprintf) (struct ui_file *, const char *, ...)
1314 ATTRIBUTE_FPTR_PRINTF_2, struct ui_file *stream, int quoter)
1316 c &= 0xFF; /* Avoid sign bit follies */
1318 if (c < 0x20 || /* Low control chars */
1319 (c >= 0x7F && c < 0xA0) || /* DEL, High controls */
1320 (sevenbit_strings && c >= 0x80))
1321 { /* high order bit set */
1325 do_fputs ("\\n", stream);
1328 do_fputs ("\\b", stream);
1331 do_fputs ("\\t", stream);
1334 do_fputs ("\\f", stream);
1337 do_fputs ("\\r", stream);
1340 do_fputs ("\\e", stream);
1343 do_fputs ("\\a", stream);
1346 do_fprintf (stream, "\\%.3o", (unsigned int) c);
1352 if (quoter != 0 && (c == '\\' || c == quoter))
1353 do_fputs ("\\", stream);
1354 do_fprintf (stream, "%c", c);
1358 /* Print the character C on STREAM as part of the contents of a
1359 literal string whose delimiter is QUOTER. Note that these routines
1360 should only be call for printing things which are independent of
1361 the language of the program being debugged. */
1364 fputstr_filtered (const char *str, int quoter, struct ui_file *stream)
1367 printchar (*str++, fputs_filtered, fprintf_filtered, stream, quoter);
1371 fputstr_unfiltered (const char *str, int quoter, struct ui_file *stream)
1374 printchar (*str++, fputs_unfiltered, fprintf_unfiltered, stream, quoter);
1378 fputstrn_filtered (const char *str, int n, int quoter,
1379 struct ui_file *stream)
1383 for (i = 0; i < n; i++)
1384 printchar (str[i], fputs_filtered, fprintf_filtered, stream, quoter);
1388 fputstrn_unfiltered (const char *str, int n, int quoter,
1389 struct ui_file *stream)
1393 for (i = 0; i < n; i++)
1394 printchar (str[i], fputs_unfiltered, fprintf_unfiltered, stream, quoter);
1398 /* Number of lines per page or UINT_MAX if paging is disabled. */
1399 static unsigned int lines_per_page;
1401 show_lines_per_page (struct ui_file *file, int from_tty,
1402 struct cmd_list_element *c, const char *value)
1404 fprintf_filtered (file,
1405 _("Number of lines gdb thinks are in a page is %s.\n"),
1409 /* Number of chars per line or UINT_MAX if line folding is disabled. */
1410 static unsigned int chars_per_line;
1412 show_chars_per_line (struct ui_file *file, int from_tty,
1413 struct cmd_list_element *c, const char *value)
1415 fprintf_filtered (file,
1416 _("Number of characters gdb thinks "
1417 "are in a line is %s.\n"),
1421 /* Current count of lines printed on this page, chars on this line. */
1422 static unsigned int lines_printed, chars_printed;
1424 /* Buffer and start column of buffered text, for doing smarter word-
1425 wrapping. When someone calls wrap_here(), we start buffering output
1426 that comes through fputs_filtered(). If we see a newline, we just
1427 spit it out and forget about the wrap_here(). If we see another
1428 wrap_here(), we spit it out and remember the newer one. If we see
1429 the end of the line, we spit out a newline, the indent, and then
1430 the buffered output. */
1432 /* Malloc'd buffer with chars_per_line+2 bytes. Contains characters which
1433 are waiting to be output (they have already been counted in chars_printed).
1434 When wrap_buffer[0] is null, the buffer is empty. */
1435 static char *wrap_buffer;
1437 /* Pointer in wrap_buffer to the next character to fill. */
1438 static char *wrap_pointer;
1440 /* String to indent by if the wrap occurs. Must not be NULL if wrap_column
1442 static const char *wrap_indent;
1444 /* Column number on the screen where wrap_buffer begins, or 0 if wrapping
1445 is not in effect. */
1446 static int wrap_column;
1449 /* Initialize the number of lines per page and chars per line. */
1452 init_page_info (void)
1456 lines_per_page = UINT_MAX;
1457 chars_per_line = UINT_MAX;
1461 if (!tui_get_command_dimension (&chars_per_line, &lines_per_page))
1466 #if defined(__GO32__)
1467 rows = ScreenRows ();
1468 cols = ScreenCols ();
1469 lines_per_page = rows;
1470 chars_per_line = cols;
1472 /* Make sure Readline has initialized its terminal settings. */
1473 rl_reset_terminal (NULL);
1475 /* Get the screen size from Readline. */
1476 rl_get_screen_size (&rows, &cols);
1477 lines_per_page = rows;
1478 chars_per_line = cols;
1480 /* Readline should have fetched the termcap entry for us.
1481 Only try to use tgetnum function if rl_get_screen_size
1482 did not return a useful value. */
1483 if (((rows <= 0) && (tgetnum ((char *) "li") < 0))
1484 /* Also disable paging if inside Emacs. $EMACS was used
1485 before Emacs v25.1, $INSIDE_EMACS is used since then. */
1486 || getenv ("EMACS") || getenv ("INSIDE_EMACS"))
1488 /* The number of lines per page is not mentioned in the terminal
1489 description or EMACS evironment variable is set. This probably
1490 means that paging is not useful, so disable paging. */
1491 lines_per_page = UINT_MAX;
1494 /* If the output is not a terminal, don't paginate it. */
1495 if (!ui_file_isatty (gdb_stdout))
1496 lines_per_page = UINT_MAX;
1500 /* We handle SIGWINCH ourselves. */
1501 rl_catch_sigwinch = 0;
1507 /* Return nonzero if filtered printing is initialized. */
1509 filtered_printing_initialized (void)
1511 return wrap_buffer != NULL;
1514 /* Helper for make_cleanup_restore_page_info. */
1517 do_restore_page_info_cleanup (void *arg)
1523 /* Provide cleanup for restoring the terminal size. */
1526 make_cleanup_restore_page_info (void)
1528 struct cleanup *back_to;
1530 back_to = make_cleanup (do_restore_page_info_cleanup, NULL);
1531 make_cleanup_restore_uinteger (&lines_per_page);
1532 make_cleanup_restore_uinteger (&chars_per_line);
1537 /* Temporarily set BATCH_FLAG and the associated unlimited terminal size.
1538 Provide cleanup for restoring the original state. */
1541 set_batch_flag_and_make_cleanup_restore_page_info (void)
1543 struct cleanup *back_to = make_cleanup_restore_page_info ();
1545 make_cleanup_restore_integer (&batch_flag);
1552 /* Set the screen size based on LINES_PER_PAGE and CHARS_PER_LINE. */
1555 set_screen_size (void)
1557 int rows = lines_per_page;
1558 int cols = chars_per_line;
1566 /* Update Readline's idea of the terminal size. */
1567 rl_set_screen_size (rows, cols);
1570 /* Reinitialize WRAP_BUFFER according to the current value of
1576 if (chars_per_line == 0)
1581 wrap_buffer = (char *) xmalloc (chars_per_line + 2);
1582 wrap_buffer[0] = '\0';
1585 wrap_buffer = (char *) xrealloc (wrap_buffer, chars_per_line + 2);
1586 wrap_pointer = wrap_buffer; /* Start it at the beginning. */
1590 set_width_command (char *args, int from_tty, struct cmd_list_element *c)
1597 set_height_command (char *args, int from_tty, struct cmd_list_element *c)
1605 set_screen_width_and_height (int width, int height)
1607 lines_per_page = height;
1608 chars_per_line = width;
1614 /* Wait, so the user can read what's on the screen. Prompt the user
1615 to continue by pressing RETURN. 'q' is also provided because
1616 telling users what to do in the prompt is more user-friendly than
1617 expecting them to think of Ctrl-C/SIGINT. */
1620 prompt_for_continue (void)
1623 char cont_prompt[120];
1624 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
1625 /* Used to add duration we waited for user to respond to
1626 prompt_for_continue_wait_time. */
1627 using namespace std::chrono;
1628 steady_clock::time_point prompt_started = steady_clock::now ();
1630 if (annotation_level > 1)
1631 printf_unfiltered (("\n\032\032pre-prompt-for-continue\n"));
1633 strcpy (cont_prompt,
1634 "---Type <return> to continue, or q <return> to quit---");
1635 if (annotation_level > 1)
1636 strcat (cont_prompt, "\n\032\032prompt-for-continue\n");
1638 /* We must do this *before* we call gdb_readline_wrapper, else it
1639 will eventually call us -- thinking that we're trying to print
1640 beyond the end of the screen. */
1641 reinitialize_more_filter ();
1643 prepare_to_handle_input ();
1645 /* Call gdb_readline_wrapper, not readline, in order to keep an
1646 event loop running. */
1647 ignore = gdb_readline_wrapper (cont_prompt);
1648 make_cleanup (xfree, ignore);
1650 /* Add time spend in this routine to prompt_for_continue_wait_time. */
1651 prompt_for_continue_wait_time += steady_clock::now () - prompt_started;
1653 if (annotation_level > 1)
1654 printf_unfiltered (("\n\032\032post-prompt-for-continue\n"));
1660 while (*p == ' ' || *p == '\t')
1663 /* Do not call quit here; there is no possibility of SIGINT. */
1664 throw_quit ("Quit");
1667 /* Now we have to do this again, so that GDB will know that it doesn't
1668 need to save the ---Type <return>--- line at the top of the screen. */
1669 reinitialize_more_filter ();
1671 dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */
1673 do_cleanups (old_chain);
1676 /* Initialize timer to keep track of how long we waited for the user. */
1679 reset_prompt_for_continue_wait_time (void)
1681 using namespace std::chrono;
1683 prompt_for_continue_wait_time = steady_clock::duration::zero ();
1686 /* Fetch the cumulative time spent in prompt_for_continue. */
1688 std::chrono::steady_clock::duration
1689 get_prompt_for_continue_wait_time ()
1691 return prompt_for_continue_wait_time;
1694 /* Reinitialize filter; ie. tell it to reset to original values. */
1697 reinitialize_more_filter (void)
1703 /* Indicate that if the next sequence of characters overflows the line,
1704 a newline should be inserted here rather than when it hits the end.
1705 If INDENT is non-null, it is a string to be printed to indent the
1706 wrapped part on the next line. INDENT must remain accessible until
1707 the next call to wrap_here() or until a newline is printed through
1710 If the line is already overfull, we immediately print a newline and
1711 the indentation, and disable further wrapping.
1713 If we don't know the width of lines, but we know the page height,
1714 we must not wrap words, but should still keep track of newlines
1715 that were explicitly printed.
1717 INDENT should not contain tabs, as that will mess up the char count
1718 on the next line. FIXME.
1720 This routine is guaranteed to force out any output which has been
1721 squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be
1722 used to force out output from the wrap_buffer. */
1725 wrap_here (const char *indent)
1727 /* This should have been allocated, but be paranoid anyway. */
1729 internal_error (__FILE__, __LINE__,
1730 _("failed internal consistency check"));
1734 *wrap_pointer = '\0';
1735 fputs_unfiltered (wrap_buffer, gdb_stdout);
1737 wrap_pointer = wrap_buffer;
1738 wrap_buffer[0] = '\0';
1739 if (chars_per_line == UINT_MAX) /* No line overflow checking. */
1743 else if (chars_printed >= chars_per_line)
1745 puts_filtered ("\n");
1747 puts_filtered (indent);
1752 wrap_column = chars_printed;
1756 wrap_indent = indent;
1760 /* Print input string to gdb_stdout, filtered, with wrap,
1761 arranging strings in columns of n chars. String can be
1762 right or left justified in the column. Never prints
1763 trailing spaces. String should never be longer than
1764 width. FIXME: this could be useful for the EXAMINE
1765 command, which currently doesn't tabulate very well. */
1768 puts_filtered_tabular (char *string, int width, int right)
1774 gdb_assert (chars_per_line > 0);
1775 if (chars_per_line == UINT_MAX)
1777 fputs_filtered (string, gdb_stdout);
1778 fputs_filtered ("\n", gdb_stdout);
1782 if (((chars_printed - 1) / width + 2) * width >= chars_per_line)
1783 fputs_filtered ("\n", gdb_stdout);
1785 if (width >= chars_per_line)
1786 width = chars_per_line - 1;
1788 stringlen = strlen (string);
1790 if (chars_printed > 0)
1791 spaces = width - (chars_printed - 1) % width - 1;
1793 spaces += width - stringlen;
1795 spacebuf = (char *) alloca (spaces + 1);
1796 spacebuf[spaces] = '\0';
1798 spacebuf[spaces] = ' ';
1800 fputs_filtered (spacebuf, gdb_stdout);
1801 fputs_filtered (string, gdb_stdout);
1805 /* Ensure that whatever gets printed next, using the filtered output
1806 commands, starts at the beginning of the line. I.e. if there is
1807 any pending output for the current line, flush it and start a new
1808 line. Otherwise do nothing. */
1813 if (chars_printed > 0)
1815 puts_filtered ("\n");
1820 /* Like fputs but if FILTER is true, pause after every screenful.
1822 Regardless of FILTER can wrap at points other than the final
1823 character of a line.
1825 Unlike fputs, fputs_maybe_filtered does not return a value.
1826 It is OK for LINEBUFFER to be NULL, in which case just don't print
1829 Note that a longjmp to top level may occur in this routine (only if
1830 FILTER is true) (since prompt_for_continue may do so) so this
1831 routine should not be called when cleanups are not in place. */
1834 fputs_maybe_filtered (const char *linebuffer, struct ui_file *stream,
1837 const char *lineptr;
1839 if (linebuffer == 0)
1842 /* Don't do any filtering if it is disabled. */
1843 if (stream != gdb_stdout
1844 || !pagination_enabled
1846 || (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX)
1847 || top_level_interpreter () == NULL
1848 || interp_ui_out (top_level_interpreter ())->is_mi_like_p ())
1850 fputs_unfiltered (linebuffer, stream);
1854 /* Go through and output each character. Show line extension
1855 when this is necessary; prompt user for new page when this is
1858 lineptr = linebuffer;
1861 /* Possible new page. */
1862 if (filter && (lines_printed >= lines_per_page - 1))
1863 prompt_for_continue ();
1865 while (*lineptr && *lineptr != '\n')
1867 /* Print a single line. */
1868 if (*lineptr == '\t')
1871 *wrap_pointer++ = '\t';
1873 fputc_unfiltered ('\t', stream);
1874 /* Shifting right by 3 produces the number of tab stops
1875 we have already passed, and then adding one and
1876 shifting left 3 advances to the next tab stop. */
1877 chars_printed = ((chars_printed >> 3) + 1) << 3;
1883 *wrap_pointer++ = *lineptr;
1885 fputc_unfiltered (*lineptr, stream);
1890 if (chars_printed >= chars_per_line)
1892 unsigned int save_chars = chars_printed;
1896 /* If we aren't actually wrapping, don't output newline --
1897 if chars_per_line is right, we probably just overflowed
1898 anyway; if it's wrong, let us keep going. */
1900 fputc_unfiltered ('\n', stream);
1902 /* Possible new page. */
1903 if (lines_printed >= lines_per_page - 1)
1904 prompt_for_continue ();
1906 /* Now output indentation and wrapped string. */
1909 fputs_unfiltered (wrap_indent, stream);
1910 *wrap_pointer = '\0'; /* Null-terminate saved stuff, */
1911 fputs_unfiltered (wrap_buffer, stream); /* and eject it. */
1912 /* FIXME, this strlen is what prevents wrap_indent from
1913 containing tabs. However, if we recurse to print it
1914 and count its chars, we risk trouble if wrap_indent is
1915 longer than (the user settable) chars_per_line.
1916 Note also that this can set chars_printed > chars_per_line
1917 if we are printing a long string. */
1918 chars_printed = strlen (wrap_indent)
1919 + (save_chars - wrap_column);
1920 wrap_pointer = wrap_buffer; /* Reset buffer */
1921 wrap_buffer[0] = '\0';
1922 wrap_column = 0; /* And disable fancy wrap */
1927 if (*lineptr == '\n')
1930 wrap_here ((char *) 0); /* Spit out chars, cancel
1933 fputc_unfiltered ('\n', stream);
1940 fputs_filtered (const char *linebuffer, struct ui_file *stream)
1942 fputs_maybe_filtered (linebuffer, stream, 1);
1946 putchar_unfiltered (int c)
1950 ui_file_write (gdb_stdout, &buf, 1);
1954 /* Write character C to gdb_stdout using GDB's paging mechanism and return C.
1955 May return nonlocally. */
1958 putchar_filtered (int c)
1960 return fputc_filtered (c, gdb_stdout);
1964 fputc_unfiltered (int c, struct ui_file *stream)
1968 ui_file_write (stream, &buf, 1);
1973 fputc_filtered (int c, struct ui_file *stream)
1979 fputs_filtered (buf, stream);
1983 /* puts_debug is like fputs_unfiltered, except it prints special
1984 characters in printable fashion. */
1987 puts_debug (char *prefix, char *string, char *suffix)
1991 /* Print prefix and suffix after each line. */
1992 static int new_line = 1;
1993 static int return_p = 0;
1994 static const char *prev_prefix = "";
1995 static const char *prev_suffix = "";
1997 if (*string == '\n')
2000 /* If the prefix is changing, print the previous suffix, a new line,
2001 and the new prefix. */
2002 if ((return_p || (strcmp (prev_prefix, prefix) != 0)) && !new_line)
2004 fputs_unfiltered (prev_suffix, gdb_stdlog);
2005 fputs_unfiltered ("\n", gdb_stdlog);
2006 fputs_unfiltered (prefix, gdb_stdlog);
2009 /* Print prefix if we printed a newline during the previous call. */
2013 fputs_unfiltered (prefix, gdb_stdlog);
2016 prev_prefix = prefix;
2017 prev_suffix = suffix;
2019 /* Output characters in a printable format. */
2020 while ((ch = *string++) != '\0')
2026 fputc_unfiltered (ch, gdb_stdlog);
2029 fprintf_unfiltered (gdb_stdlog, "\\x%02x", ch & 0xff);
2033 fputs_unfiltered ("\\\\", gdb_stdlog);
2036 fputs_unfiltered ("\\b", gdb_stdlog);
2039 fputs_unfiltered ("\\f", gdb_stdlog);
2043 fputs_unfiltered ("\\n", gdb_stdlog);
2046 fputs_unfiltered ("\\r", gdb_stdlog);
2049 fputs_unfiltered ("\\t", gdb_stdlog);
2052 fputs_unfiltered ("\\v", gdb_stdlog);
2056 return_p = ch == '\r';
2059 /* Print suffix if we printed a newline. */
2062 fputs_unfiltered (suffix, gdb_stdlog);
2063 fputs_unfiltered ("\n", gdb_stdlog);
2068 /* Print a variable number of ARGS using format FORMAT. If this
2069 information is going to put the amount written (since the last call
2070 to REINITIALIZE_MORE_FILTER or the last page break) over the page size,
2071 call prompt_for_continue to get the users permision to continue.
2073 Unlike fprintf, this function does not return a value.
2075 We implement three variants, vfprintf (takes a vararg list and stream),
2076 fprintf (takes a stream to write on), and printf (the usual).
2078 Note also that a longjmp to top level may occur in this routine
2079 (since prompt_for_continue may do so) so this routine should not be
2080 called when cleanups are not in place. */
2083 vfprintf_maybe_filtered (struct ui_file *stream, const char *format,
2084 va_list args, int filter)
2087 struct cleanup *old_cleanups;
2089 linebuffer = xstrvprintf (format, args);
2090 old_cleanups = make_cleanup (xfree, linebuffer);
2091 fputs_maybe_filtered (linebuffer, stream, filter);
2092 do_cleanups (old_cleanups);
2097 vfprintf_filtered (struct ui_file *stream, const char *format, va_list args)
2099 vfprintf_maybe_filtered (stream, format, args, 1);
2103 vfprintf_unfiltered (struct ui_file *stream, const char *format, va_list args)
2106 struct cleanup *old_cleanups;
2108 linebuffer = xstrvprintf (format, args);
2109 old_cleanups = make_cleanup (xfree, linebuffer);
2110 if (debug_timestamp && stream == gdb_stdlog)
2112 using namespace std::chrono;
2115 steady_clock::time_point now = steady_clock::now ();
2116 seconds s = duration_cast<seconds> (now.time_since_epoch ());
2117 microseconds us = duration_cast<microseconds> (now.time_since_epoch () - s);
2119 len = strlen (linebuffer);
2120 need_nl = (len > 0 && linebuffer[len - 1] != '\n');
2122 std::string timestamp = string_printf ("%ld.%06ld %s%s",
2125 linebuffer, need_nl ? "\n": "");
2126 fputs_unfiltered (timestamp.c_str (), stream);
2129 fputs_unfiltered (linebuffer, stream);
2130 do_cleanups (old_cleanups);
2134 vprintf_filtered (const char *format, va_list args)
2136 vfprintf_maybe_filtered (gdb_stdout, format, args, 1);
2140 vprintf_unfiltered (const char *format, va_list args)
2142 vfprintf_unfiltered (gdb_stdout, format, args);
2146 fprintf_filtered (struct ui_file *stream, const char *format, ...)
2150 va_start (args, format);
2151 vfprintf_filtered (stream, format, args);
2156 fprintf_unfiltered (struct ui_file *stream, const char *format, ...)
2160 va_start (args, format);
2161 vfprintf_unfiltered (stream, format, args);
2165 /* Like fprintf_filtered, but prints its result indented.
2166 Called as fprintfi_filtered (spaces, stream, format, ...); */
2169 fprintfi_filtered (int spaces, struct ui_file *stream, const char *format,
2174 va_start (args, format);
2175 print_spaces_filtered (spaces, stream);
2177 vfprintf_filtered (stream, format, args);
2183 printf_filtered (const char *format, ...)
2187 va_start (args, format);
2188 vfprintf_filtered (gdb_stdout, format, args);
2194 printf_unfiltered (const char *format, ...)
2198 va_start (args, format);
2199 vfprintf_unfiltered (gdb_stdout, format, args);
2203 /* Like printf_filtered, but prints it's result indented.
2204 Called as printfi_filtered (spaces, format, ...); */
2207 printfi_filtered (int spaces, const char *format, ...)
2211 va_start (args, format);
2212 print_spaces_filtered (spaces, gdb_stdout);
2213 vfprintf_filtered (gdb_stdout, format, args);
2217 /* Easy -- but watch out!
2219 This routine is *not* a replacement for puts()! puts() appends a newline.
2220 This one doesn't, and had better not! */
2223 puts_filtered (const char *string)
2225 fputs_filtered (string, gdb_stdout);
2229 puts_unfiltered (const char *string)
2231 fputs_unfiltered (string, gdb_stdout);
2234 /* Return a pointer to N spaces and a null. The pointer is good
2235 until the next call to here. */
2240 static char *spaces = 0;
2241 static int max_spaces = -1;
2247 spaces = (char *) xmalloc (n + 1);
2248 for (t = spaces + n; t != spaces;)
2254 return spaces + max_spaces - n;
2257 /* Print N spaces. */
2259 print_spaces_filtered (int n, struct ui_file *stream)
2261 fputs_filtered (n_spaces (n), stream);
2264 /* C++/ObjC demangler stuff. */
2266 /* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language
2267 LANG, using demangling args ARG_MODE, and print it filtered to STREAM.
2268 If the name is not mangled, or the language for the name is unknown, or
2269 demangling is off, the name is printed in its "raw" form. */
2272 fprintf_symbol_filtered (struct ui_file *stream, const char *name,
2273 enum language lang, int arg_mode)
2279 /* If user wants to see raw output, no problem. */
2282 fputs_filtered (name, stream);
2286 demangled = language_demangle (language_def (lang), name, arg_mode);
2287 fputs_filtered (demangled ? demangled : name, stream);
2288 if (demangled != NULL)
2296 /* Modes of operation for strncmp_iw_with_mode. */
2298 enum class strncmp_iw_mode
2300 /* Work like strncmp, while ignoring whitespace. */
2303 /* Like NORMAL, but also apply the strcmp_iw hack. I.e.,
2304 string1=="FOO(PARAMS)" matches string2=="FOO". */
2308 /* Helper for strncmp_iw and strcmp_iw. */
2311 strncmp_iw_with_mode (const char *string1, const char *string2,
2312 size_t string2_len, strncmp_iw_mode mode)
2314 const char *end_str2 = string2 + string2_len;
2318 while (isspace (*string1))
2320 while (string2 < end_str2 && isspace (*string2))
2322 if (*string1 == '\0' || string2 == end_str2)
2324 if (case_sensitivity == case_sensitive_on && *string1 != *string2)
2326 if (case_sensitivity == case_sensitive_off
2327 && (tolower ((unsigned char) *string1)
2328 != tolower ((unsigned char) *string2)))
2335 if (string2 == end_str2)
2337 if (mode == strncmp_iw_mode::NORMAL)
2340 return (*string1 != '\0' && *string1 != '(');
2349 strncmp_iw (const char *string1, const char *string2, size_t string2_len)
2351 return strncmp_iw_with_mode (string1, string2, string2_len,
2352 strncmp_iw_mode::NORMAL);
2358 strcmp_iw (const char *string1, const char *string2)
2360 return strncmp_iw_with_mode (string1, string2, strlen (string2),
2361 strncmp_iw_mode::MATCH_PARAMS);
2364 /* This is like strcmp except that it ignores whitespace and treats
2365 '(' as the first non-NULL character in terms of ordering. Like
2366 strcmp (and unlike strcmp_iw), it returns negative if STRING1 <
2367 STRING2, 0 if STRING2 = STRING2, and positive if STRING1 > STRING2
2368 according to that ordering.
2370 If a list is sorted according to this function and if you want to
2371 find names in the list that match some fixed NAME according to
2372 strcmp_iw(LIST_ELT, NAME), then the place to start looking is right
2373 where this function would put NAME.
2375 This function must be neutral to the CASE_SENSITIVITY setting as the user
2376 may choose it during later lookup. Therefore this function always sorts
2377 primarily case-insensitively and secondarily case-sensitively.
2379 Here are some examples of why using strcmp to sort is a bad idea:
2383 Say your partial symtab contains: "foo<char *>", "goo". Then, if
2384 we try to do a search for "foo<char*>", strcmp will locate this
2385 after "foo<char *>" and before "goo". Then lookup_partial_symbol
2386 will start looking at strings beginning with "goo", and will never
2387 see the correct match of "foo<char *>".
2389 Parenthesis example:
2391 In practice, this is less like to be an issue, but I'll give it a
2392 shot. Let's assume that '$' is a legitimate character to occur in
2393 symbols. (Which may well even be the case on some systems.) Then
2394 say that the partial symbol table contains "foo$" and "foo(int)".
2395 strcmp will put them in this order, since '$' < '('. Now, if the
2396 user searches for "foo", then strcmp will sort "foo" before "foo$".
2397 Then lookup_partial_symbol will notice that strcmp_iw("foo$",
2398 "foo") is false, so it won't proceed to the actual match of
2399 "foo(int)" with "foo". */
2402 strcmp_iw_ordered (const char *string1, const char *string2)
2404 const char *saved_string1 = string1, *saved_string2 = string2;
2405 enum case_sensitivity case_pass = case_sensitive_off;
2409 /* C1 and C2 are valid only if *string1 != '\0' && *string2 != '\0'.
2410 Provide stub characters if we are already at the end of one of the
2412 char c1 = 'X', c2 = 'X';
2414 while (*string1 != '\0' && *string2 != '\0')
2416 while (isspace (*string1))
2418 while (isspace (*string2))
2423 case case_sensitive_off:
2424 c1 = tolower ((unsigned char) *string1);
2425 c2 = tolower ((unsigned char) *string2);
2427 case case_sensitive_on:
2435 if (*string1 != '\0')
2444 /* Characters are non-equal unless they're both '\0'; we want to
2445 make sure we get the comparison right according to our
2446 comparison in the cases where one of them is '\0' or '('. */
2448 if (*string2 == '\0')
2453 if (*string2 == '\0')
2458 if (*string2 == '\0' || *string2 == '(')
2467 if (case_pass == case_sensitive_on)
2470 /* Otherwise the strings were equal in case insensitive way, make
2471 a more fine grained comparison in a case sensitive way. */
2473 case_pass = case_sensitive_on;
2474 string1 = saved_string1;
2475 string2 = saved_string2;
2479 /* A simple comparison function with opposite semantics to strcmp. */
2482 streq (const char *lhs, const char *rhs)
2484 return !strcmp (lhs, rhs);
2490 ** Answer whether string_to_compare is a full or partial match to
2491 ** template_string. The partial match must be in sequence starting
2495 subset_compare (const char *string_to_compare, const char *template_string)
2499 if (template_string != (char *) NULL && string_to_compare != (char *) NULL
2500 && strlen (string_to_compare) <= strlen (template_string))
2502 (startswith (template_string, string_to_compare));
2509 show_debug_timestamp (struct ui_file *file, int from_tty,
2510 struct cmd_list_element *c, const char *value)
2512 fprintf_filtered (file, _("Timestamping debugging messages is %s.\n"),
2518 initialize_utils (void)
2520 add_setshow_uinteger_cmd ("width", class_support, &chars_per_line, _("\
2521 Set number of characters where GDB should wrap lines of its output."), _("\
2522 Show number of characters where GDB should wrap lines of its output."), _("\
2523 This affects where GDB wraps its output to fit the screen width.\n\
2524 Setting this to \"unlimited\" or zero prevents GDB from wrapping its output."),
2526 show_chars_per_line,
2527 &setlist, &showlist);
2529 add_setshow_uinteger_cmd ("height", class_support, &lines_per_page, _("\
2530 Set number of lines in a page for GDB output pagination."), _("\
2531 Show number of lines in a page for GDB output pagination."), _("\
2532 This affects the number of lines after which GDB will pause\n\
2533 its output and ask you whether to continue.\n\
2534 Setting this to \"unlimited\" or zero causes GDB never pause during output."),
2536 show_lines_per_page,
2537 &setlist, &showlist);
2539 add_setshow_boolean_cmd ("pagination", class_support,
2540 &pagination_enabled, _("\
2541 Set state of GDB output pagination."), _("\
2542 Show state of GDB output pagination."), _("\
2543 When pagination is ON, GDB pauses at end of each screenful of\n\
2544 its output and asks you whether to continue.\n\
2545 Turning pagination off is an alternative to \"set height unlimited\"."),
2547 show_pagination_enabled,
2548 &setlist, &showlist);
2550 add_setshow_boolean_cmd ("sevenbit-strings", class_support,
2551 &sevenbit_strings, _("\
2552 Set printing of 8-bit characters in strings as \\nnn."), _("\
2553 Show printing of 8-bit characters in strings as \\nnn."), NULL,
2555 show_sevenbit_strings,
2556 &setprintlist, &showprintlist);
2558 add_setshow_boolean_cmd ("timestamp", class_maintenance,
2559 &debug_timestamp, _("\
2560 Set timestamping of debugging messages."), _("\
2561 Show timestamping of debugging messages."), _("\
2562 When set, debugging messages will be marked with seconds and microseconds."),
2564 show_debug_timestamp,
2565 &setdebuglist, &showdebuglist);
2569 paddress (struct gdbarch *gdbarch, CORE_ADDR addr)
2571 /* Truncate address to the size of a target address, avoiding shifts
2572 larger or equal than the width of a CORE_ADDR. The local
2573 variable ADDR_BIT stops the compiler reporting a shift overflow
2574 when it won't occur. */
2575 /* NOTE: This assumes that the significant address information is
2576 kept in the least significant bits of ADDR - the upper bits were
2577 either zero or sign extended. Should gdbarch_address_to_pointer or
2578 some ADDRESS_TO_PRINTABLE() be used to do the conversion? */
2580 int addr_bit = gdbarch_addr_bit (gdbarch);
2582 if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))
2583 addr &= ((CORE_ADDR) 1 << addr_bit) - 1;
2584 return hex_string (addr);
2587 /* This function is described in "defs.h". */
2590 print_core_address (struct gdbarch *gdbarch, CORE_ADDR address)
2592 int addr_bit = gdbarch_addr_bit (gdbarch);
2594 if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))
2595 address &= ((CORE_ADDR) 1 << addr_bit) - 1;
2597 /* FIXME: cagney/2002-05-03: Need local_address_string() function
2598 that returns the language localized string formatted to a width
2599 based on gdbarch_addr_bit. */
2601 return hex_string_custom (address, 8);
2603 return hex_string_custom (address, 16);
2606 /* Callback hash_f for htab_create_alloc or htab_create_alloc_ex. */
2609 core_addr_hash (const void *ap)
2611 const CORE_ADDR *addrp = (const CORE_ADDR *) ap;
2616 /* Callback eq_f for htab_create_alloc or htab_create_alloc_ex. */
2619 core_addr_eq (const void *ap, const void *bp)
2621 const CORE_ADDR *addr_ap = (const CORE_ADDR *) ap;
2622 const CORE_ADDR *addr_bp = (const CORE_ADDR *) bp;
2624 return *addr_ap == *addr_bp;
2627 /* Convert a string back into a CORE_ADDR. */
2629 string_to_core_addr (const char *my_string)
2633 if (my_string[0] == '0' && tolower (my_string[1]) == 'x')
2635 /* Assume that it is in hex. */
2638 for (i = 2; my_string[i] != '\0'; i++)
2640 if (isdigit (my_string[i]))
2641 addr = (my_string[i] - '0') + (addr * 16);
2642 else if (isxdigit (my_string[i]))
2643 addr = (tolower (my_string[i]) - 'a' + 0xa) + (addr * 16);
2645 error (_("invalid hex \"%s\""), my_string);
2650 /* Assume that it is in decimal. */
2653 for (i = 0; my_string[i] != '\0'; i++)
2655 if (isdigit (my_string[i]))
2656 addr = (my_string[i] - '0') + (addr * 10);
2658 error (_("invalid decimal \"%s\""), my_string);
2666 gdb_realpath (const char *filename)
2668 /* On most hosts, we rely on canonicalize_file_name to compute
2669 the FILENAME's realpath.
2671 But the situation is slightly more complex on Windows, due to some
2672 versions of GCC which were reported to generate paths where
2673 backlashes (the directory separator) were doubled. For instance:
2674 c:\\some\\double\\slashes\\dir
2676 c:\some\double\slashes\dir
2677 Those double-slashes were getting in the way when comparing paths,
2678 for instance when trying to insert a breakpoint as follow:
2679 (gdb) b c:/some/double/slashes/dir/foo.c:4
2680 No source file named c:/some/double/slashes/dir/foo.c:4.
2681 (gdb) b c:\some\double\slashes\dir\foo.c:4
2682 No source file named c:\some\double\slashes\dir\foo.c:4.
2683 To prevent this from happening, we need this function to always
2684 strip those extra backslashes. While canonicalize_file_name does
2685 perform this simplification, it only works when the path is valid.
2686 Since the simplification would be useful even if the path is not
2687 valid (one can always set a breakpoint on a file, even if the file
2688 does not exist locally), we rely instead on GetFullPathName to
2689 perform the canonicalization. */
2691 #if defined (_WIN32)
2694 DWORD len = GetFullPathName (filename, MAX_PATH, buf, NULL);
2696 /* The file system is case-insensitive but case-preserving.
2697 So it is important we do not lowercase the path. Otherwise,
2698 we might not be able to display the original casing in a given
2700 if (len > 0 && len < MAX_PATH)
2701 return xstrdup (buf);
2705 char *rp = canonicalize_file_name (filename);
2712 /* This system is a lost cause, just dup the buffer. */
2713 return xstrdup (filename);
2716 /* Return a copy of FILENAME, with its directory prefix canonicalized
2720 gdb_realpath_keepfile (const char *filename)
2722 const char *base_name = lbasename (filename);
2727 /* Extract the basename of filename, and return immediately
2728 a copy of filename if it does not contain any directory prefix. */
2729 if (base_name == filename)
2730 return xstrdup (filename);
2732 dir_name = (char *) alloca ((size_t) (base_name - filename + 2));
2733 /* Allocate enough space to store the dir_name + plus one extra
2734 character sometimes needed under Windows (see below), and
2735 then the closing \000 character. */
2736 strncpy (dir_name, filename, base_name - filename);
2737 dir_name[base_name - filename] = '\000';
2739 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
2740 /* We need to be careful when filename is of the form 'd:foo', which
2741 is equivalent of d:./foo, which is totally different from d:/foo. */
2742 if (strlen (dir_name) == 2 && isalpha (dir_name[0]) && dir_name[1] == ':')
2745 dir_name[3] = '\000';
2749 /* Canonicalize the directory prefix, and build the resulting
2750 filename. If the dirname realpath already contains an ending
2751 directory separator, avoid doubling it. */
2752 real_path = gdb_realpath (dir_name);
2753 if (IS_DIR_SEPARATOR (real_path[strlen (real_path) - 1]))
2754 result = concat (real_path, base_name, (char *) NULL);
2756 result = concat (real_path, SLASH_STRING, base_name, (char *) NULL);
2762 /* Return PATH in absolute form, performing tilde-expansion if necessary.
2763 PATH cannot be NULL or the empty string.
2764 This does not resolve symlinks however, use gdb_realpath for that. */
2766 gdb::unique_xmalloc_ptr<char>
2767 gdb_abspath (const char *path)
2769 gdb_assert (path != NULL && path[0] != '\0');
2772 return gdb::unique_xmalloc_ptr<char> (tilde_expand (path));
2774 if (IS_ABSOLUTE_PATH (path))
2775 return gdb::unique_xmalloc_ptr<char> (xstrdup (path));
2777 /* Beware the // my son, the Emacs barfs, the botch that catch... */
2778 return gdb::unique_xmalloc_ptr<char>
2779 (concat (current_directory,
2780 IS_DIR_SEPARATOR (current_directory[strlen (current_directory) - 1])
2781 ? "" : SLASH_STRING,
2782 path, (char *) NULL));
2786 align_up (ULONGEST v, int n)
2788 /* Check that N is really a power of two. */
2789 gdb_assert (n && (n & (n-1)) == 0);
2790 return (v + n - 1) & -n;
2794 align_down (ULONGEST v, int n)
2796 /* Check that N is really a power of two. */
2797 gdb_assert (n && (n & (n-1)) == 0);
2801 /* Allocation function for the libiberty hash table which uses an
2802 obstack. The obstack is passed as DATA. */
2805 hashtab_obstack_allocate (void *data, size_t size, size_t count)
2807 size_t total = size * count;
2808 void *ptr = obstack_alloc ((struct obstack *) data, total);
2810 memset (ptr, 0, total);
2814 /* Trivial deallocation function for the libiberty splay tree and hash
2815 table - don't deallocate anything. Rely on later deletion of the
2816 obstack. DATA will be the obstack, although it is not needed
2820 dummy_obstack_deallocate (void *object, void *data)
2825 /* Simple, portable version of dirname that does not modify its
2829 ldirname (const char *filename)
2831 std::string dirname;
2832 const char *base = lbasename (filename);
2834 while (base > filename && IS_DIR_SEPARATOR (base[-1]))
2837 if (base == filename)
2840 dirname = std::string (filename, base - filename);
2842 /* On DOS based file systems, convert "d:foo" to "d:.", so that we
2843 create "d:./bar" later instead of the (different) "d:/bar". */
2844 if (base - filename == 2 && IS_ABSOLUTE_PATH (base)
2845 && !IS_DIR_SEPARATOR (filename[0]))
2846 dirname[base++ - filename] = '.';
2854 gdb_argv::reset (const char *s)
2856 char **argv = buildargv (s);
2858 if (s != NULL && argv == NULL)
2866 compare_positive_ints (const void *ap, const void *bp)
2868 /* Because we know we're comparing two ints which are positive,
2869 there's no danger of overflow here. */
2870 return * (int *) ap - * (int *) bp;
2873 /* String compare function for qsort. */
2876 compare_strings (const void *arg1, const void *arg2)
2878 const char **s1 = (const char **) arg1;
2879 const char **s2 = (const char **) arg2;
2881 return strcmp (*s1, *s2);
2884 #define AMBIGUOUS_MESS1 ".\nMatching formats:"
2885 #define AMBIGUOUS_MESS2 \
2886 ".\nUse \"set gnutarget format-name\" to specify the format."
2889 gdb_bfd_errmsg (bfd_error_type error_tag, char **matching)
2895 /* Check if errmsg just need simple return. */
2896 if (error_tag != bfd_error_file_ambiguously_recognized || matching == NULL)
2897 return bfd_errmsg (error_tag);
2899 ret_len = strlen (bfd_errmsg (error_tag)) + strlen (AMBIGUOUS_MESS1)
2900 + strlen (AMBIGUOUS_MESS2);
2901 for (p = matching; *p; p++)
2902 ret_len += strlen (*p) + 1;
2903 ret = (char *) xmalloc (ret_len + 1);
2905 make_cleanup (xfree, ret);
2907 strcpy (retp, bfd_errmsg (error_tag));
2908 retp += strlen (retp);
2910 strcpy (retp, AMBIGUOUS_MESS1);
2911 retp += strlen (retp);
2913 for (p = matching; *p; p++)
2915 sprintf (retp, " %s", *p);
2916 retp += strlen (retp);
2920 strcpy (retp, AMBIGUOUS_MESS2);
2925 /* Return ARGS parsed as a valid pid, or throw an error. */
2928 parse_pid_to_attach (const char *args)
2934 error_no_arg (_("process-id to attach"));
2936 dummy = (char *) args;
2937 pid = strtoul (args, &dummy, 0);
2938 /* Some targets don't set errno on errors, grrr! */
2939 if ((pid == 0 && dummy == args) || dummy != &args[strlen (args)])
2940 error (_("Illegal process-id: %s."), args);
2945 /* Helper for make_bpstat_clear_actions_cleanup. */
2948 do_bpstat_clear_actions_cleanup (void *unused)
2950 bpstat_clear_actions ();
2953 /* Call bpstat_clear_actions for the case an exception is throw. You should
2954 discard_cleanups if no exception is caught. */
2957 make_bpstat_clear_actions_cleanup (void)
2959 return make_cleanup (do_bpstat_clear_actions_cleanup, NULL);
2962 /* Check for GCC >= 4.x according to the symtab->producer string. Return minor
2963 version (x) of 4.x in such case. If it is not GCC or it is GCC older than
2964 4.x return -1. If it is GCC 5.x or higher return INT_MAX. */
2967 producer_is_gcc_ge_4 (const char *producer)
2971 if (! producer_is_gcc (producer, &major, &minor))
2980 /* Returns nonzero if the given PRODUCER string is GCC and sets the MAJOR
2981 and MINOR versions when not NULL. Returns zero if the given PRODUCER
2982 is NULL or it isn't GCC. */
2985 producer_is_gcc (const char *producer, int *major, int *minor)
2989 if (producer != NULL && startswith (producer, "GNU "))
2998 /* Skip any identifier after "GNU " - such as "C11" or "C++".
2999 A full producer string might look like:
3001 "GNU Fortran 4.8.2 20140120 (Red Hat 4.8.2-16) -mtune=generic ..."
3002 "GNU C++14 5.0.0 20150123 (experimental)"
3004 cs = &producer[strlen ("GNU ")];
3005 while (*cs && !isspace (*cs))
3007 if (*cs && isspace (*cs))
3009 if (sscanf (cs, "%d.%d", major, minor) == 2)
3013 /* Not recognized as GCC. */
3017 /* Helper for make_cleanup_free_char_ptr_vec. */
3020 do_free_char_ptr_vec (void *arg)
3022 VEC (char_ptr) *char_ptr_vec = (VEC (char_ptr) *) arg;
3024 free_char_ptr_vec (char_ptr_vec);
3027 /* Make cleanup handler calling xfree for each element of CHAR_PTR_VEC and
3028 final VEC_free for CHAR_PTR_VEC itself.
3030 You must not modify CHAR_PTR_VEC after this cleanup registration as the
3031 CHAR_PTR_VEC base address may change on its updates. Contrary to VEC_free
3032 this function does not (cannot) clear the pointer. */
3035 make_cleanup_free_char_ptr_vec (VEC (char_ptr) *char_ptr_vec)
3037 return make_cleanup (do_free_char_ptr_vec, char_ptr_vec);
3040 /* Substitute all occurences of string FROM by string TO in *STRINGP. *STRINGP
3041 must come from xrealloc-compatible allocator and it may be updated. FROM
3042 needs to be delimited by IS_DIR_SEPARATOR or DIRNAME_SEPARATOR (or be
3043 located at the start or end of *STRINGP. */
3046 substitute_path_component (char **stringp, const char *from, const char *to)
3048 char *string = *stringp, *s;
3049 const size_t from_len = strlen (from);
3050 const size_t to_len = strlen (to);
3054 s = strstr (s, from);
3058 if ((s == string || IS_DIR_SEPARATOR (s[-1])
3059 || s[-1] == DIRNAME_SEPARATOR)
3060 && (s[from_len] == '\0' || IS_DIR_SEPARATOR (s[from_len])
3061 || s[from_len] == DIRNAME_SEPARATOR))
3066 = (char *) xrealloc (string, (strlen (string) + to_len + 1));
3068 /* Relocate the current S pointer. */
3069 s = s - string + string_new;
3070 string = string_new;
3072 /* Replace from by to. */
3073 memmove (&s[to_len], &s[from_len], strlen (&s[from_len]) + 1);
3074 memcpy (s, to, to_len);
3089 /* SIGALRM handler for waitpid_with_timeout. */
3092 sigalrm_handler (int signo)
3094 /* Nothing to do. */
3099 /* Wrapper to wait for child PID to die with TIMEOUT.
3100 TIMEOUT is the time to stop waiting in seconds.
3101 If TIMEOUT is zero, pass WNOHANG to waitpid.
3102 Returns PID if it was successfully waited for, otherwise -1.
3104 Timeouts are currently implemented with alarm and SIGALRM.
3105 If the host does not support them, this waits "forever".
3106 It would be odd though for a host to have waitpid and not SIGALRM. */
3109 wait_to_die_with_timeout (pid_t pid, int *status, int timeout)
3111 pid_t waitpid_result;
3113 gdb_assert (pid > 0);
3114 gdb_assert (timeout >= 0);
3119 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
3120 struct sigaction sa, old_sa;
3122 sa.sa_handler = sigalrm_handler;
3123 sigemptyset (&sa.sa_mask);
3125 sigaction (SIGALRM, &sa, &old_sa);
3129 ofunc = signal (SIGALRM, sigalrm_handler);
3135 waitpid_result = waitpid (pid, status, 0);
3139 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
3140 sigaction (SIGALRM, &old_sa, NULL);
3142 signal (SIGALRM, ofunc);
3147 waitpid_result = waitpid (pid, status, WNOHANG);
3149 if (waitpid_result == pid)
3155 #endif /* HAVE_WAITPID */
3157 /* Provide fnmatch compatible function for FNM_FILE_NAME matching of host files.
3158 Both FNM_FILE_NAME and FNM_NOESCAPE must be set in FLAGS.
3160 It handles correctly HAVE_DOS_BASED_FILE_SYSTEM and
3161 HAVE_CASE_INSENSITIVE_FILE_SYSTEM. */
3164 gdb_filename_fnmatch (const char *pattern, const char *string, int flags)
3166 gdb_assert ((flags & FNM_FILE_NAME) != 0);
3168 /* It is unclear how '\' escaping vs. directory separator should coexist. */
3169 gdb_assert ((flags & FNM_NOESCAPE) != 0);
3171 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
3173 char *pattern_slash, *string_slash;
3175 /* Replace '\' by '/' in both strings. */
3177 pattern_slash = (char *) alloca (strlen (pattern) + 1);
3178 strcpy (pattern_slash, pattern);
3179 pattern = pattern_slash;
3180 for (; *pattern_slash != 0; pattern_slash++)
3181 if (IS_DIR_SEPARATOR (*pattern_slash))
3182 *pattern_slash = '/';
3184 string_slash = (char *) alloca (strlen (string) + 1);
3185 strcpy (string_slash, string);
3186 string = string_slash;
3187 for (; *string_slash != 0; string_slash++)
3188 if (IS_DIR_SEPARATOR (*string_slash))
3189 *string_slash = '/';
3191 #endif /* HAVE_DOS_BASED_FILE_SYSTEM */
3193 #ifdef HAVE_CASE_INSENSITIVE_FILE_SYSTEM
3194 flags |= FNM_CASEFOLD;
3195 #endif /* HAVE_CASE_INSENSITIVE_FILE_SYSTEM */
3197 return fnmatch (pattern, string, flags);
3200 /* Return the number of path elements in PATH.
3208 count_path_elements (const char *path)
3211 const char *p = path;
3213 if (HAS_DRIVE_SPEC (p))
3215 p = STRIP_DRIVE_SPEC (p);
3221 if (IS_DIR_SEPARATOR (*p))
3226 /* Backup one if last character is /, unless it's the only one. */
3227 if (p > path + 1 && IS_DIR_SEPARATOR (p[-1]))
3230 /* Add one for the file name, if present. */
3231 if (p > path && !IS_DIR_SEPARATOR (p[-1]))
3237 /* Remove N leading path elements from PATH.
3238 N must be non-negative.
3239 If PATH has more than N path elements then return NULL.
3240 If PATH has exactly N path elements then return "".
3241 See count_path_elements for a description of how we do the counting. */
3244 strip_leading_path_elements (const char *path, int n)
3247 const char *p = path;
3249 gdb_assert (n >= 0);
3254 if (HAS_DRIVE_SPEC (p))
3256 p = STRIP_DRIVE_SPEC (p);
3262 while (*p != '\0' && !IS_DIR_SEPARATOR (*p))
3277 /* Provide a prototype to silence -Wmissing-prototypes. */
3278 extern initialize_file_ftype _initialize_utils;
3281 _initialize_utils (void)
3283 add_internal_problem_command (&internal_error_problem);
3284 add_internal_problem_command (&internal_warning_problem);
3285 add_internal_problem_command (&demangler_warning_problem);