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"
69 #include "common/selftest.h"
70 #include "common/gdb_optional.h"
73 extern PTR malloc (); /* ARI: PTR */
75 #if !HAVE_DECL_REALLOC
76 extern PTR realloc (); /* ARI: PTR */
82 void (*deprecated_error_begin_hook) (void);
84 /* Prototypes for local functions */
86 static void vfprintf_maybe_filtered (struct ui_file *, const char *,
87 va_list, int) ATTRIBUTE_PRINTF (2, 0);
89 static void fputs_maybe_filtered (const char *, struct ui_file *, int);
91 static void prompt_for_continue (void);
93 static void set_screen_size (void);
94 static void set_width (void);
96 /* Time spent in prompt_for_continue in the currently executing command
97 waiting for user to respond.
98 Initialized in make_command_stats_cleanup.
99 Modified in prompt_for_continue and defaulted_query.
100 Used in report_command_stats. */
102 static std::chrono::steady_clock::duration prompt_for_continue_wait_time;
104 /* A flag indicating whether to timestamp debugging messages. */
106 static int debug_timestamp = 0;
108 /* Nonzero means that strings with character values >0x7F should be printed
109 as octal escapes. Zero means just print the value (e.g. it's an
110 international character, and the terminal or window can cope.) */
112 int sevenbit_strings = 0;
114 show_sevenbit_strings (struct ui_file *file, int from_tty,
115 struct cmd_list_element *c, const char *value)
117 fprintf_filtered (file, _("Printing of 8-bit characters "
118 "in strings as \\nnn is %s.\n"),
122 /* String to be printed before warning messages, if any. */
124 const char *warning_pre_print = "\nwarning: ";
126 int pagination_enabled = 1;
128 show_pagination_enabled (struct ui_file *file, int from_tty,
129 struct cmd_list_element *c, const char *value)
131 fprintf_filtered (file, _("State of pagination is %s.\n"), value);
135 /* Cleanup utilities.
137 These are not defined in cleanups.c (nor declared in cleanups.h)
138 because while they use the "cleanup API" they are not part of the
142 do_free_section_addr_info (void *arg)
144 free_section_addr_info ((struct section_addr_info *) arg);
148 make_cleanup_free_section_addr_info (struct section_addr_info *addrs)
150 return make_cleanup (do_free_section_addr_info, addrs);
153 /* Helper for make_cleanup_unpush_target. */
156 do_unpush_target (void *arg)
158 struct target_ops *ops = (struct target_ops *) arg;
163 /* Return a new cleanup that unpushes OPS. */
166 make_cleanup_unpush_target (struct target_ops *ops)
168 return make_cleanup (do_unpush_target, ops);
171 /* Helper for make_cleanup_value_free_to_mark. */
174 do_value_free_to_mark (void *value)
176 value_free_to_mark ((struct value *) value);
179 /* Free all values allocated since MARK was obtained by value_mark
180 (except for those released) when the cleanup is run. */
183 make_cleanup_value_free_to_mark (struct value *mark)
185 return make_cleanup (do_value_free_to_mark, mark);
188 /* Helper for make_cleanup_value_free. */
191 do_value_free (void *value)
193 value_free ((struct value *) value);
199 make_cleanup_value_free (struct value *value)
201 return make_cleanup (do_value_free, value);
204 /* This function is useful for cleanups.
208 old_chain = make_cleanup (free_current_contents, &foo);
210 to arrange to free the object thus allocated. */
213 free_current_contents (void *ptr)
215 void **location = (void **) ptr;
217 if (location == NULL)
218 internal_error (__FILE__, __LINE__,
219 _("free_current_contents: NULL pointer"));
220 if (*location != NULL)
229 /* Print a warning message. The first argument STRING is the warning
230 message, used as an fprintf format string, the second is the
231 va_list of arguments for that string. A warning is unfiltered (not
232 paginated) so that the user does not need to page through each
233 screen full of warnings when there are lots of them. */
236 vwarning (const char *string, va_list args)
238 if (deprecated_warning_hook)
239 (*deprecated_warning_hook) (string, args);
242 gdb::optional<target_terminal::scoped_restore_terminal_state> term_state;
243 if (target_supports_terminal_ours ())
245 term_state.emplace ();
246 target_terminal::ours_for_output ();
248 if (filtered_printing_initialized ())
249 wrap_here (""); /* Force out any buffered output. */
250 gdb_flush (gdb_stdout);
251 if (warning_pre_print)
252 fputs_unfiltered (warning_pre_print, gdb_stderr);
253 vfprintf_unfiltered (gdb_stderr, string, args);
254 fprintf_unfiltered (gdb_stderr, "\n");
258 /* Print an error message and return to command level.
259 The first argument STRING is the error message, used as a fprintf string,
260 and the remaining args are passed as arguments to it. */
263 verror (const char *string, va_list args)
265 throw_verror (GENERIC_ERROR, string, args);
269 error_stream (const string_file &stream)
271 error (("%s"), stream.c_str ());
274 /* Emit a message and abort. */
276 static void ATTRIBUTE_NORETURN
277 abort_with_message (const char *msg)
279 if (current_ui == NULL)
282 fputs_unfiltered (msg, gdb_stderr);
284 abort (); /* NOTE: GDB has only three calls to abort(). */
287 /* Dump core trying to increase the core soft limit to hard limit first. */
292 #ifdef HAVE_SETRLIMIT
293 struct rlimit rlim = { RLIM_INFINITY, RLIM_INFINITY };
295 setrlimit (RLIMIT_CORE, &rlim);
296 #endif /* HAVE_SETRLIMIT */
298 abort (); /* NOTE: GDB has only three calls to abort(). */
301 /* Check whether GDB will be able to dump core using the dump_core
302 function. Returns zero if GDB cannot or should not dump core.
303 If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected.
304 If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */
307 can_dump_core (enum resource_limit_kind limit_kind)
309 #ifdef HAVE_GETRLIMIT
312 /* Be quiet and assume we can dump if an error is returned. */
313 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
319 if (rlim.rlim_cur == 0)
323 if (rlim.rlim_max == 0)
326 #endif /* HAVE_GETRLIMIT */
331 /* Print a warning that we cannot dump core. */
334 warn_cant_dump_core (const char *reason)
336 fprintf_unfiltered (gdb_stderr,
337 _("%s\nUnable to dump core, use `ulimit -c"
338 " unlimited' before executing GDB next time.\n"),
342 /* Check whether GDB will be able to dump core using the dump_core
343 function, and print a warning if we cannot. */
346 can_dump_core_warn (enum resource_limit_kind limit_kind,
349 int core_dump_allowed = can_dump_core (limit_kind);
351 if (!core_dump_allowed)
352 warn_cant_dump_core (reason);
354 return core_dump_allowed;
357 /* Allow the user to configure the debugger behavior with respect to
358 what to do when an internal problem is detected. */
360 const char internal_problem_ask[] = "ask";
361 const char internal_problem_yes[] = "yes";
362 const char internal_problem_no[] = "no";
363 static const char *const internal_problem_modes[] =
365 internal_problem_ask,
366 internal_problem_yes,
371 /* Print a message reporting an internal error/warning. Ask the user
372 if they want to continue, dump core, or just exit. Return
373 something to indicate a quit. */
375 struct internal_problem
378 int user_settable_should_quit;
379 const char *should_quit;
380 int user_settable_should_dump_core;
381 const char *should_dump_core;
384 /* Report a problem, internal to GDB, to the user. Once the problem
385 has been reported, and assuming GDB didn't quit, the caller can
386 either allow execution to resume or throw an error. */
388 static void ATTRIBUTE_PRINTF (4, 0)
389 internal_vproblem (struct internal_problem *problem,
390 const char *file, int line, const char *fmt, va_list ap)
396 struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
398 /* Don't allow infinite error/warning recursion. */
400 static char msg[] = "Recursive internal problem.\n";
409 abort_with_message (msg);
412 /* Newer GLIBC versions put the warn_unused_result attribute
413 on write, but this is one of those rare cases where
414 ignoring the return value is correct. Casting to (void)
415 does not fix this problem. This is the solution suggested
416 at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509. */
417 if (write (STDERR_FILENO, msg, sizeof (msg)) != sizeof (msg))
418 abort (); /* NOTE: GDB has only three calls to abort(). */
423 /* Create a string containing the full error/warning message. Need
424 to call query with this full string, as otherwize the reason
425 (error/warning) and question become separated. Format using a
426 style similar to a compiler error message. Include extra detail
427 so that the user knows that they are living on the edge. */
431 msg = xstrvprintf (fmt, ap);
432 reason = xstrprintf ("%s:%d: %s: %s\n"
433 "A problem internal to GDB has been detected,\n"
434 "further debugging may prove unreliable.",
435 file, line, problem->name, msg);
437 make_cleanup (xfree, reason);
440 /* Fall back to abort_with_message if gdb_stderr is not set up. */
441 if (current_ui == NULL)
443 fputs (reason, stderr);
444 abort_with_message ("\n");
447 /* Try to get the message out and at the start of a new line. */
448 gdb::optional<target_terminal::scoped_restore_terminal_state> term_state;
449 if (target_supports_terminal_ours ())
451 term_state.emplace ();
452 target_terminal::ours_for_output ();
454 if (filtered_printing_initialized ())
457 /* Emit the message unless query will emit it below. */
458 if (problem->should_quit != internal_problem_ask
460 || !filtered_printing_initialized ())
461 fprintf_unfiltered (gdb_stderr, "%s\n", reason);
463 if (problem->should_quit == internal_problem_ask)
465 /* Default (yes/batch case) is to quit GDB. When in batch mode
466 this lessens the likelihood of GDB going into an infinite
468 if (!confirm || !filtered_printing_initialized ())
471 quit_p = query (_("%s\nQuit this debugging session? "), reason);
473 else if (problem->should_quit == internal_problem_yes)
475 else if (problem->should_quit == internal_problem_no)
478 internal_error (__FILE__, __LINE__, _("bad switch"));
480 fputs_unfiltered (_("\nThis is a bug, please report it."), gdb_stderr);
481 if (REPORT_BUGS_TO[0])
482 fprintf_unfiltered (gdb_stderr, _(" For instructions, see:\n%s."),
484 fputs_unfiltered ("\n\n", gdb_stderr);
486 if (problem->should_dump_core == internal_problem_ask)
488 if (!can_dump_core_warn (LIMIT_MAX, reason))
490 else if (!filtered_printing_initialized ())
494 /* Default (yes/batch case) is to dump core. This leaves a GDB
495 `dropping' so that it is easier to see that something went
497 dump_core_p = query (_("%s\nCreate a core file of GDB? "), reason);
500 else if (problem->should_dump_core == internal_problem_yes)
501 dump_core_p = can_dump_core_warn (LIMIT_MAX, reason);
502 else if (problem->should_dump_core == internal_problem_no)
505 internal_error (__FILE__, __LINE__, _("bad switch"));
518 #ifdef HAVE_WORKING_FORK
526 do_cleanups (cleanup);
529 static struct internal_problem internal_error_problem = {
530 "internal-error", 1, internal_problem_ask, 1, internal_problem_ask
534 internal_verror (const char *file, int line, const char *fmt, va_list ap)
536 internal_vproblem (&internal_error_problem, file, line, fmt, ap);
537 throw_quit (_("Command aborted."));
540 static struct internal_problem internal_warning_problem = {
541 "internal-warning", 1, internal_problem_ask, 1, internal_problem_ask
545 internal_vwarning (const char *file, int line, const char *fmt, va_list ap)
547 internal_vproblem (&internal_warning_problem, file, line, fmt, ap);
550 static struct internal_problem demangler_warning_problem = {
551 "demangler-warning", 1, internal_problem_ask, 0, internal_problem_no
555 demangler_vwarning (const char *file, int line, const char *fmt, va_list ap)
557 internal_vproblem (&demangler_warning_problem, file, line, fmt, ap);
561 demangler_warning (const char *file, int line, const char *string, ...)
565 va_start (ap, string);
566 demangler_vwarning (file, line, string, ap);
570 /* Dummy functions to keep add_prefix_cmd happy. */
573 set_internal_problem_cmd (char *args, int from_tty)
578 show_internal_problem_cmd (char *args, int from_tty)
582 /* When GDB reports an internal problem (error or warning) it gives
583 the user the opportunity to quit GDB and/or create a core file of
584 the current debug session. This function registers a few commands
585 that make it possible to specify that GDB should always or never
586 quit or create a core file, without asking. The commands look
589 maint set PROBLEM-NAME quit ask|yes|no
590 maint show PROBLEM-NAME quit
591 maint set PROBLEM-NAME corefile ask|yes|no
592 maint show PROBLEM-NAME corefile
594 Where PROBLEM-NAME is currently "internal-error" or
595 "internal-warning". */
598 add_internal_problem_command (struct internal_problem *problem)
600 struct cmd_list_element **set_cmd_list;
601 struct cmd_list_element **show_cmd_list;
605 set_cmd_list = XNEW (struct cmd_list_element *);
606 show_cmd_list = XNEW (struct cmd_list_element *);
607 *set_cmd_list = NULL;
608 *show_cmd_list = NULL;
610 set_doc = xstrprintf (_("Configure what GDB does when %s is detected."),
613 show_doc = xstrprintf (_("Show what GDB does when %s is detected."),
616 add_prefix_cmd ((char*) problem->name,
617 class_maintenance, set_internal_problem_cmd, set_doc,
619 concat ("maintenance set ", problem->name, " ",
621 0/*allow-unknown*/, &maintenance_set_cmdlist);
623 add_prefix_cmd ((char*) problem->name,
624 class_maintenance, show_internal_problem_cmd, show_doc,
626 concat ("maintenance show ", problem->name, " ",
628 0/*allow-unknown*/, &maintenance_show_cmdlist);
630 if (problem->user_settable_should_quit)
632 set_doc = xstrprintf (_("Set whether GDB should quit "
633 "when an %s is detected"),
635 show_doc = xstrprintf (_("Show whether GDB will quit "
636 "when an %s is detected"),
638 add_setshow_enum_cmd ("quit", class_maintenance,
639 internal_problem_modes,
640 &problem->should_quit,
653 if (problem->user_settable_should_dump_core)
655 set_doc = xstrprintf (_("Set whether GDB should create a core "
656 "file of GDB when %s is detected"),
658 show_doc = xstrprintf (_("Show whether GDB will create a core "
659 "file of GDB when %s is detected"),
661 add_setshow_enum_cmd ("corefile", class_maintenance,
662 internal_problem_modes,
663 &problem->should_dump_core,
677 /* Return a newly allocated string, containing the PREFIX followed
678 by the system error message for errno (separated by a colon). */
681 perror_string (const char *prefix)
685 err = safe_strerror (errno);
686 return std::string (prefix) + ": " + err;
689 /* Print the system error message for errno, and also mention STRING
690 as the file name for which the error was encountered. Use ERRCODE
691 for the thrown exception. Then return to command level. */
694 throw_perror_with_name (enum errors errcode, const char *string)
696 std::string combined = perror_string (string);
698 /* I understand setting these is a matter of taste. Still, some people
699 may clear errno but not know about bfd_error. Doing this here is not
701 bfd_set_error (bfd_error_no_error);
704 throw_error (errcode, _("%s."), combined.c_str ());
707 /* See throw_perror_with_name, ERRCODE defaults here to GENERIC_ERROR. */
710 perror_with_name (const char *string)
712 throw_perror_with_name (GENERIC_ERROR, string);
715 /* Same as perror_with_name except that it prints a warning instead
716 of throwing an error. */
719 perror_warning_with_name (const char *string)
721 std::string combined = perror_string (string);
722 warning (_("%s"), combined.c_str ());
725 /* Print the system error message for ERRCODE, and also mention STRING
726 as the file name for which the error was encountered. */
729 print_sys_errmsg (const char *string, int errcode)
734 err = safe_strerror (errcode);
735 combined = (char *) alloca (strlen (err) + strlen (string) + 3);
736 strcpy (combined, string);
737 strcat (combined, ": ");
738 strcat (combined, err);
740 /* We want anything which was printed on stdout to come out first, before
742 gdb_flush (gdb_stdout);
743 fprintf_unfiltered (gdb_stderr, "%s.\n", combined);
746 /* Control C eventually causes this to be called, at a convenient time. */
751 struct ui *ui = current_ui;
753 if (sync_quit_force_run)
755 sync_quit_force_run = 0;
756 quit_force (NULL, 0);
760 /* No steenking SIGINT will ever be coming our way when the
761 program is resumed. Don't lie. */
765 /* If there is no terminal switching for this target, then we can't
766 possibly get screwed by the lack of job control. */
767 || !target_supports_terminal_ours ())
770 throw_quit ("Quit (expect signal SIGINT when the program is resumed)");
779 if (sync_quit_force_run)
784 if (deprecated_interactive_hook)
785 deprecated_interactive_hook ();
789 /* Called when a memory allocation fails, with the number of bytes of
790 memory requested in SIZE. */
793 malloc_failure (long size)
797 internal_error (__FILE__, __LINE__,
798 _("virtual memory exhausted: can't allocate %ld bytes."),
803 internal_error (__FILE__, __LINE__, _("virtual memory exhausted."));
807 /* My replacement for the read system call.
808 Used like `read' but keeps going if `read' returns too soon. */
811 myread (int desc, char *addr, int len)
818 val = read (desc, addr, len);
830 print_spaces (int n, struct ui_file *file)
832 fputs_unfiltered (n_spaces (n), file);
835 /* Print a host address. */
838 gdb_print_host_address_1 (const void *addr, struct ui_file *stream)
840 fprintf_filtered (stream, "%s", host_address_to_string (addr));
846 make_hex_string (const gdb_byte *data, size_t length)
848 char *result = (char *) xmalloc (length * 2 + 1);
853 for (i = 0; i < length; ++i)
854 p += xsnprintf (p, 3, "%02x", data[i]);
861 /* An RAII class that sets up to handle input and then tears down
862 during destruction. */
864 class scoped_input_handler
868 scoped_input_handler ()
869 : m_quit_handler (&quit_handler, default_quit_handler),
872 target_terminal::ours ();
873 ui_register_input_event_handler (current_ui);
874 if (current_ui->prompt_state == PROMPT_BLOCKED)
878 ~scoped_input_handler ()
881 ui_unregister_input_event_handler (m_ui);
884 DISABLE_COPY_AND_ASSIGN (scoped_input_handler);
888 /* Save and restore the terminal state. */
889 target_terminal::scoped_restore_terminal_state m_term_state;
891 /* Save and restore the quit handler. */
892 scoped_restore_tmpl<quit_handler_ftype *> m_quit_handler;
894 /* The saved UI, if non-NULL. */
900 /* This function supports the query, nquery, and yquery functions.
901 Ask user a y-or-n question and return 0 if answer is no, 1 if
902 answer is yes, or default the answer to the specified default
903 (for yquery or nquery). DEFCHAR may be 'y' or 'n' to provide a
904 default answer, or '\0' for no default.
905 CTLSTR is the control string and should end in "? ". It should
906 not say how to answer, because we do that.
907 ARGS are the arguments passed along with the CTLSTR argument to
910 static int ATTRIBUTE_PRINTF (1, 0)
911 defaulted_query (const char *ctlstr, const char defchar, va_list args)
916 char def_answer, not_def_answer;
917 const char *y_string, *n_string;
918 char *question, *prompt;
919 struct cleanup *old_chain;
921 /* Set up according to which answer is the default. */
926 not_def_answer = 'N';
930 else if (defchar == 'y')
934 not_def_answer = 'N';
942 not_def_answer = 'Y';
947 /* Automatically answer the default value if the user did not want
948 prompts or the command was issued with the server prefix. */
949 if (!confirm || server_command)
952 /* If input isn't coming from the user directly, just say what
953 question we're asking, and then answer the default automatically. This
954 way, important error messages don't get lost when talking to GDB
956 if (current_ui->instream != current_ui->stdin_stream
957 || !input_interactive_p (current_ui)
958 /* Restrict queries to the main UI. */
959 || current_ui != main_ui)
961 target_terminal::scoped_restore_terminal_state term_state;
962 target_terminal::ours_for_output ();
964 vfprintf_filtered (gdb_stdout, ctlstr, args);
966 printf_filtered (_("(%s or %s) [answered %c; "
967 "input not from terminal]\n"),
968 y_string, n_string, def_answer);
969 gdb_flush (gdb_stdout);
974 if (deprecated_query_hook)
976 target_terminal::scoped_restore_terminal_state term_state;
977 return deprecated_query_hook (ctlstr, args);
980 /* Format the question outside of the loop, to avoid reusing args. */
981 question = xstrvprintf (ctlstr, args);
982 old_chain = make_cleanup (xfree, question);
983 prompt = xstrprintf (_("%s%s(%s or %s) %s"),
984 annotation_level > 1 ? "\n\032\032pre-query\n" : "",
985 question, y_string, n_string,
986 annotation_level > 1 ? "\n\032\032query\n" : "");
987 make_cleanup (xfree, prompt);
989 /* Used to add duration we waited for user to respond to
990 prompt_for_continue_wait_time. */
991 using namespace std::chrono;
992 steady_clock::time_point prompt_started = steady_clock::now ();
994 scoped_input_handler prepare_input;
998 char *response, answer;
1000 gdb_flush (gdb_stdout);
1001 response = gdb_readline_wrapper (prompt);
1003 if (response == NULL) /* C-d */
1005 printf_filtered ("EOF [assumed %c]\n", def_answer);
1010 answer = response[0];
1015 /* Check answer. For the non-default, the user must specify
1016 the non-default explicitly. */
1017 if (answer == not_def_answer)
1019 retval = !def_value;
1022 /* Otherwise, if a default was specified, the user may either
1023 specify the required input or have it default by entering
1025 if (answer == def_answer
1026 || (defchar != '\0' && answer == '\0'))
1031 /* Invalid entries are not defaulted and require another selection. */
1032 printf_filtered (_("Please answer %s or %s.\n"),
1033 y_string, n_string);
1036 /* Add time spend in this routine to prompt_for_continue_wait_time. */
1037 prompt_for_continue_wait_time += steady_clock::now () - prompt_started;
1039 if (annotation_level > 1)
1040 printf_filtered (("\n\032\032post-query\n"));
1041 do_cleanups (old_chain);
1046 /* Ask user a y-or-n question and return 0 if answer is no, 1 if
1047 answer is yes, or 0 if answer is defaulted.
1048 Takes three args which are given to printf to print the question.
1049 The first, a control string, should end in "? ".
1050 It should not say how to answer, because we do that. */
1053 nquery (const char *ctlstr, ...)
1058 va_start (args, ctlstr);
1059 ret = defaulted_query (ctlstr, 'n', args);
1064 /* Ask user a y-or-n question and return 0 if answer is no, 1 if
1065 answer is yes, or 1 if answer is defaulted.
1066 Takes three args which are given to printf to print the question.
1067 The first, a control string, should end in "? ".
1068 It should not say how to answer, because we do that. */
1071 yquery (const char *ctlstr, ...)
1076 va_start (args, ctlstr);
1077 ret = defaulted_query (ctlstr, 'y', args);
1082 /* Ask user a y-or-n question and return 1 iff answer is yes.
1083 Takes three args which are given to printf to print the question.
1084 The first, a control string, should end in "? ".
1085 It should not say how to answer, because we do that. */
1088 query (const char *ctlstr, ...)
1093 va_start (args, ctlstr);
1094 ret = defaulted_query (ctlstr, '\0', args);
1099 /* A helper for parse_escape that converts a host character to a
1100 target character. C is the host character. If conversion is
1101 possible, then the target character is stored in *TARGET_C and the
1102 function returns 1. Otherwise, the function returns 0. */
1105 host_char_to_target (struct gdbarch *gdbarch, int c, int *target_c)
1110 auto_obstack host_data;
1112 convert_between_encodings (target_charset (gdbarch), host_charset (),
1113 (gdb_byte *) &the_char, 1, 1,
1114 &host_data, translit_none);
1116 if (obstack_object_size (&host_data) == 1)
1119 *target_c = *(char *) obstack_base (&host_data);
1125 /* Parse a C escape sequence. STRING_PTR points to a variable
1126 containing a pointer to the string to parse. That pointer
1127 should point to the character after the \. That pointer
1128 is updated past the characters we use. The value of the
1129 escape sequence is returned.
1131 A negative value means the sequence \ newline was seen,
1132 which is supposed to be equivalent to nothing at all.
1134 If \ is followed by a null character, we return a negative
1135 value and leave the string pointer pointing at the null character.
1137 If \ is followed by 000, we return 0 and leave the string pointer
1138 after the zeros. A value of 0 does not mean end of string. */
1141 parse_escape (struct gdbarch *gdbarch, const char **string_ptr)
1143 int target_char = -2; /* Initialize to avoid GCC warnings. */
1144 int c = *(*string_ptr)++;
1163 int i = host_hex_value (c);
1168 if (isdigit (c) && c != '8' && c != '9')
1172 i += host_hex_value (c);
1208 if (!host_char_to_target (gdbarch, c, &target_char))
1209 error (_("The escape sequence `\\%c' is equivalent to plain `%c',"
1210 " which has no equivalent\nin the `%s' character set."),
1211 c, c, target_charset (gdbarch));
1215 /* Print the character C on STREAM as part of the contents of a literal
1216 string whose delimiter is QUOTER. Note that this routine should only
1217 be called for printing things which are independent of the language
1218 of the program being debugged.
1220 printchar will normally escape backslashes and instances of QUOTER. If
1221 QUOTER is 0, printchar won't escape backslashes or any quoting character.
1222 As a side effect, if you pass the backslash character as the QUOTER,
1223 printchar will escape backslashes as usual, but not any other quoting
1227 printchar (int c, void (*do_fputs) (const char *, struct ui_file *),
1228 void (*do_fprintf) (struct ui_file *, const char *, ...)
1229 ATTRIBUTE_FPTR_PRINTF_2, struct ui_file *stream, int quoter)
1231 c &= 0xFF; /* Avoid sign bit follies */
1233 if (c < 0x20 || /* Low control chars */
1234 (c >= 0x7F && c < 0xA0) || /* DEL, High controls */
1235 (sevenbit_strings && c >= 0x80))
1236 { /* high order bit set */
1240 do_fputs ("\\n", stream);
1243 do_fputs ("\\b", stream);
1246 do_fputs ("\\t", stream);
1249 do_fputs ("\\f", stream);
1252 do_fputs ("\\r", stream);
1255 do_fputs ("\\e", stream);
1258 do_fputs ("\\a", stream);
1261 do_fprintf (stream, "\\%.3o", (unsigned int) c);
1267 if (quoter != 0 && (c == '\\' || c == quoter))
1268 do_fputs ("\\", stream);
1269 do_fprintf (stream, "%c", c);
1273 /* Print the character C on STREAM as part of the contents of a
1274 literal string whose delimiter is QUOTER. Note that these routines
1275 should only be call for printing things which are independent of
1276 the language of the program being debugged. */
1279 fputstr_filtered (const char *str, int quoter, struct ui_file *stream)
1282 printchar (*str++, fputs_filtered, fprintf_filtered, stream, quoter);
1286 fputstr_unfiltered (const char *str, int quoter, struct ui_file *stream)
1289 printchar (*str++, fputs_unfiltered, fprintf_unfiltered, stream, quoter);
1293 fputstrn_filtered (const char *str, int n, int quoter,
1294 struct ui_file *stream)
1298 for (i = 0; i < n; i++)
1299 printchar (str[i], fputs_filtered, fprintf_filtered, stream, quoter);
1303 fputstrn_unfiltered (const char *str, int n, int quoter,
1304 struct ui_file *stream)
1308 for (i = 0; i < n; i++)
1309 printchar (str[i], fputs_unfiltered, fprintf_unfiltered, stream, quoter);
1313 /* Number of lines per page or UINT_MAX if paging is disabled. */
1314 static unsigned int lines_per_page;
1316 show_lines_per_page (struct ui_file *file, int from_tty,
1317 struct cmd_list_element *c, const char *value)
1319 fprintf_filtered (file,
1320 _("Number of lines gdb thinks are in a page is %s.\n"),
1324 /* Number of chars per line or UINT_MAX if line folding is disabled. */
1325 static unsigned int chars_per_line;
1327 show_chars_per_line (struct ui_file *file, int from_tty,
1328 struct cmd_list_element *c, const char *value)
1330 fprintf_filtered (file,
1331 _("Number of characters gdb thinks "
1332 "are in a line is %s.\n"),
1336 /* Current count of lines printed on this page, chars on this line. */
1337 static unsigned int lines_printed, chars_printed;
1339 /* Buffer and start column of buffered text, for doing smarter word-
1340 wrapping. When someone calls wrap_here(), we start buffering output
1341 that comes through fputs_filtered(). If we see a newline, we just
1342 spit it out and forget about the wrap_here(). If we see another
1343 wrap_here(), we spit it out and remember the newer one. If we see
1344 the end of the line, we spit out a newline, the indent, and then
1345 the buffered output. */
1347 /* Malloc'd buffer with chars_per_line+2 bytes. Contains characters which
1348 are waiting to be output (they have already been counted in chars_printed).
1349 When wrap_buffer[0] is null, the buffer is empty. */
1350 static char *wrap_buffer;
1352 /* Pointer in wrap_buffer to the next character to fill. */
1353 static char *wrap_pointer;
1355 /* String to indent by if the wrap occurs. Must not be NULL if wrap_column
1357 static const char *wrap_indent;
1359 /* Column number on the screen where wrap_buffer begins, or 0 if wrapping
1360 is not in effect. */
1361 static int wrap_column;
1364 /* Initialize the number of lines per page and chars per line. */
1367 init_page_info (void)
1371 lines_per_page = UINT_MAX;
1372 chars_per_line = UINT_MAX;
1376 if (!tui_get_command_dimension (&chars_per_line, &lines_per_page))
1381 #if defined(__GO32__)
1382 rows = ScreenRows ();
1383 cols = ScreenCols ();
1384 lines_per_page = rows;
1385 chars_per_line = cols;
1387 /* Make sure Readline has initialized its terminal settings. */
1388 rl_reset_terminal (NULL);
1390 /* Get the screen size from Readline. */
1391 rl_get_screen_size (&rows, &cols);
1392 lines_per_page = rows;
1393 chars_per_line = cols;
1395 /* Readline should have fetched the termcap entry for us.
1396 Only try to use tgetnum function if rl_get_screen_size
1397 did not return a useful value. */
1398 if (((rows <= 0) && (tgetnum ((char *) "li") < 0))
1399 /* Also disable paging if inside Emacs. $EMACS was used
1400 before Emacs v25.1, $INSIDE_EMACS is used since then. */
1401 || getenv ("EMACS") || getenv ("INSIDE_EMACS"))
1403 /* The number of lines per page is not mentioned in the terminal
1404 description or EMACS evironment variable is set. This probably
1405 means that paging is not useful, so disable paging. */
1406 lines_per_page = UINT_MAX;
1409 /* If the output is not a terminal, don't paginate it. */
1410 if (!ui_file_isatty (gdb_stdout))
1411 lines_per_page = UINT_MAX;
1415 /* We handle SIGWINCH ourselves. */
1416 rl_catch_sigwinch = 0;
1422 /* Return nonzero if filtered printing is initialized. */
1424 filtered_printing_initialized (void)
1426 return wrap_buffer != NULL;
1429 set_batch_flag_and_restore_page_info::set_batch_flag_and_restore_page_info ()
1430 : m_save_lines_per_page (lines_per_page),
1431 m_save_chars_per_line (chars_per_line),
1432 m_save_batch_flag (batch_flag)
1438 set_batch_flag_and_restore_page_info::~set_batch_flag_and_restore_page_info ()
1440 batch_flag = m_save_batch_flag;
1441 chars_per_line = m_save_chars_per_line;
1442 lines_per_page = m_save_lines_per_page;
1448 /* Set the screen size based on LINES_PER_PAGE and CHARS_PER_LINE. */
1451 set_screen_size (void)
1453 int rows = lines_per_page;
1454 int cols = chars_per_line;
1462 /* Update Readline's idea of the terminal size. */
1463 rl_set_screen_size (rows, cols);
1466 /* Reinitialize WRAP_BUFFER according to the current value of
1472 if (chars_per_line == 0)
1477 wrap_buffer = (char *) xmalloc (chars_per_line + 2);
1478 wrap_buffer[0] = '\0';
1481 wrap_buffer = (char *) xrealloc (wrap_buffer, chars_per_line + 2);
1482 wrap_pointer = wrap_buffer; /* Start it at the beginning. */
1486 set_width_command (char *args, int from_tty, struct cmd_list_element *c)
1493 set_height_command (char *args, int from_tty, struct cmd_list_element *c)
1501 set_screen_width_and_height (int width, int height)
1503 lines_per_page = height;
1504 chars_per_line = width;
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. */
1516 prompt_for_continue (void)
1519 char cont_prompt[120];
1520 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
1521 /* Used to add duration we waited for user to respond to
1522 prompt_for_continue_wait_time. */
1523 using namespace std::chrono;
1524 steady_clock::time_point prompt_started = steady_clock::now ();
1526 if (annotation_level > 1)
1527 printf_unfiltered (("\n\032\032pre-prompt-for-continue\n"));
1529 strcpy (cont_prompt,
1530 "---Type <return> to continue, or q <return> to quit---");
1531 if (annotation_level > 1)
1532 strcat (cont_prompt, "\n\032\032prompt-for-continue\n");
1534 /* We must do this *before* we call gdb_readline_wrapper, else it
1535 will eventually call us -- thinking that we're trying to print
1536 beyond the end of the screen. */
1537 reinitialize_more_filter ();
1539 scoped_input_handler prepare_input;
1541 /* Call gdb_readline_wrapper, not readline, in order to keep an
1542 event loop running. */
1543 ignore = gdb_readline_wrapper (cont_prompt);
1544 make_cleanup (xfree, ignore);
1546 /* Add time spend in this routine to prompt_for_continue_wait_time. */
1547 prompt_for_continue_wait_time += steady_clock::now () - prompt_started;
1549 if (annotation_level > 1)
1550 printf_unfiltered (("\n\032\032post-prompt-for-continue\n"));
1556 while (*p == ' ' || *p == '\t')
1559 /* Do not call quit here; there is no possibility of SIGINT. */
1560 throw_quit ("Quit");
1563 /* Now we have to do this again, so that GDB will know that it doesn't
1564 need to save the ---Type <return>--- line at the top of the screen. */
1565 reinitialize_more_filter ();
1567 dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */
1569 do_cleanups (old_chain);
1572 /* Initialize timer to keep track of how long we waited for the user. */
1575 reset_prompt_for_continue_wait_time (void)
1577 using namespace std::chrono;
1579 prompt_for_continue_wait_time = steady_clock::duration::zero ();
1582 /* Fetch the cumulative time spent in prompt_for_continue. */
1584 std::chrono::steady_clock::duration
1585 get_prompt_for_continue_wait_time ()
1587 return prompt_for_continue_wait_time;
1590 /* Reinitialize filter; ie. tell it to reset to original values. */
1593 reinitialize_more_filter (void)
1599 /* Indicate that if the next sequence of characters overflows the line,
1600 a newline should be inserted here rather than when it hits the end.
1601 If INDENT is non-null, it is a string to be printed to indent the
1602 wrapped part on the next line. INDENT must remain accessible until
1603 the next call to wrap_here() or until a newline is printed through
1606 If the line is already overfull, we immediately print a newline and
1607 the indentation, and disable further wrapping.
1609 If we don't know the width of lines, but we know the page height,
1610 we must not wrap words, but should still keep track of newlines
1611 that were explicitly printed.
1613 INDENT should not contain tabs, as that will mess up the char count
1614 on the next line. FIXME.
1616 This routine is guaranteed to force out any output which has been
1617 squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be
1618 used to force out output from the wrap_buffer. */
1621 wrap_here (const char *indent)
1623 /* This should have been allocated, but be paranoid anyway. */
1625 internal_error (__FILE__, __LINE__,
1626 _("failed internal consistency check"));
1630 *wrap_pointer = '\0';
1631 fputs_unfiltered (wrap_buffer, gdb_stdout);
1633 wrap_pointer = wrap_buffer;
1634 wrap_buffer[0] = '\0';
1635 if (chars_per_line == UINT_MAX) /* No line overflow checking. */
1639 else if (chars_printed >= chars_per_line)
1641 puts_filtered ("\n");
1643 puts_filtered (indent);
1648 wrap_column = chars_printed;
1652 wrap_indent = indent;
1656 /* Print input string to gdb_stdout, filtered, with wrap,
1657 arranging strings in columns of n chars. String can be
1658 right or left justified in the column. Never prints
1659 trailing spaces. String should never be longer than
1660 width. FIXME: this could be useful for the EXAMINE
1661 command, which currently doesn't tabulate very well. */
1664 puts_filtered_tabular (char *string, int width, int right)
1670 gdb_assert (chars_per_line > 0);
1671 if (chars_per_line == UINT_MAX)
1673 fputs_filtered (string, gdb_stdout);
1674 fputs_filtered ("\n", gdb_stdout);
1678 if (((chars_printed - 1) / width + 2) * width >= chars_per_line)
1679 fputs_filtered ("\n", gdb_stdout);
1681 if (width >= chars_per_line)
1682 width = chars_per_line - 1;
1684 stringlen = strlen (string);
1686 if (chars_printed > 0)
1687 spaces = width - (chars_printed - 1) % width - 1;
1689 spaces += width - stringlen;
1691 spacebuf = (char *) alloca (spaces + 1);
1692 spacebuf[spaces] = '\0';
1694 spacebuf[spaces] = ' ';
1696 fputs_filtered (spacebuf, gdb_stdout);
1697 fputs_filtered (string, gdb_stdout);
1701 /* Ensure that whatever gets printed next, using the filtered output
1702 commands, starts at the beginning of the line. I.e. if there is
1703 any pending output for the current line, flush it and start a new
1704 line. Otherwise do nothing. */
1709 if (chars_printed > 0)
1711 puts_filtered ("\n");
1716 /* Like fputs but if FILTER is true, pause after every screenful.
1718 Regardless of FILTER can wrap at points other than the final
1719 character of a line.
1721 Unlike fputs, fputs_maybe_filtered does not return a value.
1722 It is OK for LINEBUFFER to be NULL, in which case just don't print
1725 Note that a longjmp to top level may occur in this routine (only if
1726 FILTER is true) (since prompt_for_continue may do so) so this
1727 routine should not be called when cleanups are not in place. */
1730 fputs_maybe_filtered (const char *linebuffer, struct ui_file *stream,
1733 const char *lineptr;
1735 if (linebuffer == 0)
1738 /* Don't do any filtering if it is disabled. */
1739 if (stream != gdb_stdout
1740 || !pagination_enabled
1742 || (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX)
1743 || top_level_interpreter () == NULL
1744 || interp_ui_out (top_level_interpreter ())->is_mi_like_p ())
1746 fputs_unfiltered (linebuffer, stream);
1750 /* Go through and output each character. Show line extension
1751 when this is necessary; prompt user for new page when this is
1754 lineptr = linebuffer;
1757 /* Possible new page. */
1758 if (filter && (lines_printed >= lines_per_page - 1))
1759 prompt_for_continue ();
1761 while (*lineptr && *lineptr != '\n')
1763 /* Print a single line. */
1764 if (*lineptr == '\t')
1767 *wrap_pointer++ = '\t';
1769 fputc_unfiltered ('\t', stream);
1770 /* Shifting right by 3 produces the number of tab stops
1771 we have already passed, and then adding one and
1772 shifting left 3 advances to the next tab stop. */
1773 chars_printed = ((chars_printed >> 3) + 1) << 3;
1779 *wrap_pointer++ = *lineptr;
1781 fputc_unfiltered (*lineptr, stream);
1786 if (chars_printed >= chars_per_line)
1788 unsigned int save_chars = chars_printed;
1792 /* If we aren't actually wrapping, don't output newline --
1793 if chars_per_line is right, we probably just overflowed
1794 anyway; if it's wrong, let us keep going. */
1796 fputc_unfiltered ('\n', stream);
1798 /* Possible new page. */
1799 if (lines_printed >= lines_per_page - 1)
1800 prompt_for_continue ();
1802 /* Now output indentation and wrapped string. */
1805 fputs_unfiltered (wrap_indent, stream);
1806 *wrap_pointer = '\0'; /* Null-terminate saved stuff, */
1807 fputs_unfiltered (wrap_buffer, stream); /* and eject it. */
1808 /* FIXME, this strlen is what prevents wrap_indent from
1809 containing tabs. However, if we recurse to print it
1810 and count its chars, we risk trouble if wrap_indent is
1811 longer than (the user settable) chars_per_line.
1812 Note also that this can set chars_printed > chars_per_line
1813 if we are printing a long string. */
1814 chars_printed = strlen (wrap_indent)
1815 + (save_chars - wrap_column);
1816 wrap_pointer = wrap_buffer; /* Reset buffer */
1817 wrap_buffer[0] = '\0';
1818 wrap_column = 0; /* And disable fancy wrap */
1823 if (*lineptr == '\n')
1826 wrap_here ((char *) 0); /* Spit out chars, cancel
1829 fputc_unfiltered ('\n', stream);
1836 fputs_filtered (const char *linebuffer, struct ui_file *stream)
1838 fputs_maybe_filtered (linebuffer, stream, 1);
1842 putchar_unfiltered (int c)
1846 ui_file_write (gdb_stdout, &buf, 1);
1850 /* Write character C to gdb_stdout using GDB's paging mechanism and return C.
1851 May return nonlocally. */
1854 putchar_filtered (int c)
1856 return fputc_filtered (c, gdb_stdout);
1860 fputc_unfiltered (int c, struct ui_file *stream)
1864 ui_file_write (stream, &buf, 1);
1869 fputc_filtered (int c, struct ui_file *stream)
1875 fputs_filtered (buf, stream);
1879 /* puts_debug is like fputs_unfiltered, except it prints special
1880 characters in printable fashion. */
1883 puts_debug (char *prefix, char *string, char *suffix)
1887 /* Print prefix and suffix after each line. */
1888 static int new_line = 1;
1889 static int return_p = 0;
1890 static const char *prev_prefix = "";
1891 static const char *prev_suffix = "";
1893 if (*string == '\n')
1896 /* If the prefix is changing, print the previous suffix, a new line,
1897 and the new prefix. */
1898 if ((return_p || (strcmp (prev_prefix, prefix) != 0)) && !new_line)
1900 fputs_unfiltered (prev_suffix, gdb_stdlog);
1901 fputs_unfiltered ("\n", gdb_stdlog);
1902 fputs_unfiltered (prefix, gdb_stdlog);
1905 /* Print prefix if we printed a newline during the previous call. */
1909 fputs_unfiltered (prefix, gdb_stdlog);
1912 prev_prefix = prefix;
1913 prev_suffix = suffix;
1915 /* Output characters in a printable format. */
1916 while ((ch = *string++) != '\0')
1922 fputc_unfiltered (ch, gdb_stdlog);
1925 fprintf_unfiltered (gdb_stdlog, "\\x%02x", ch & 0xff);
1929 fputs_unfiltered ("\\\\", gdb_stdlog);
1932 fputs_unfiltered ("\\b", gdb_stdlog);
1935 fputs_unfiltered ("\\f", gdb_stdlog);
1939 fputs_unfiltered ("\\n", gdb_stdlog);
1942 fputs_unfiltered ("\\r", gdb_stdlog);
1945 fputs_unfiltered ("\\t", gdb_stdlog);
1948 fputs_unfiltered ("\\v", gdb_stdlog);
1952 return_p = ch == '\r';
1955 /* Print suffix if we printed a newline. */
1958 fputs_unfiltered (suffix, gdb_stdlog);
1959 fputs_unfiltered ("\n", gdb_stdlog);
1964 /* Print a variable number of ARGS using format FORMAT. If this
1965 information is going to put the amount written (since the last call
1966 to REINITIALIZE_MORE_FILTER or the last page break) over the page size,
1967 call prompt_for_continue to get the users permision to continue.
1969 Unlike fprintf, this function does not return a value.
1971 We implement three variants, vfprintf (takes a vararg list and stream),
1972 fprintf (takes a stream to write on), and printf (the usual).
1974 Note also that a longjmp to top level may occur in this routine
1975 (since prompt_for_continue may do so) so this routine should not be
1976 called when cleanups are not in place. */
1979 vfprintf_maybe_filtered (struct ui_file *stream, const char *format,
1980 va_list args, int filter)
1982 std::string linebuffer = string_vprintf (format, args);
1983 fputs_maybe_filtered (linebuffer.c_str (), stream, filter);
1988 vfprintf_filtered (struct ui_file *stream, const char *format, va_list args)
1990 vfprintf_maybe_filtered (stream, format, args, 1);
1994 vfprintf_unfiltered (struct ui_file *stream, const char *format, va_list args)
1996 std::string linebuffer = string_vprintf (format, args);
1997 if (debug_timestamp && stream == gdb_stdlog)
1999 using namespace std::chrono;
2002 steady_clock::time_point now = steady_clock::now ();
2003 seconds s = duration_cast<seconds> (now.time_since_epoch ());
2004 microseconds us = duration_cast<microseconds> (now.time_since_epoch () - s);
2006 len = linebuffer.size ();
2007 need_nl = (len > 0 && linebuffer[len - 1] != '\n');
2009 std::string timestamp = string_printf ("%ld.%06ld %s%s",
2012 linebuffer.c_str (),
2013 need_nl ? "\n": "");
2014 fputs_unfiltered (timestamp.c_str (), stream);
2017 fputs_unfiltered (linebuffer.c_str (), stream);
2021 vprintf_filtered (const char *format, va_list args)
2023 vfprintf_maybe_filtered (gdb_stdout, format, args, 1);
2027 vprintf_unfiltered (const char *format, va_list args)
2029 vfprintf_unfiltered (gdb_stdout, format, args);
2033 fprintf_filtered (struct ui_file *stream, const char *format, ...)
2037 va_start (args, format);
2038 vfprintf_filtered (stream, format, args);
2043 fprintf_unfiltered (struct ui_file *stream, const char *format, ...)
2047 va_start (args, format);
2048 vfprintf_unfiltered (stream, format, args);
2052 /* Like fprintf_filtered, but prints its result indented.
2053 Called as fprintfi_filtered (spaces, stream, format, ...); */
2056 fprintfi_filtered (int spaces, struct ui_file *stream, const char *format,
2061 va_start (args, format);
2062 print_spaces_filtered (spaces, stream);
2064 vfprintf_filtered (stream, format, args);
2070 printf_filtered (const char *format, ...)
2074 va_start (args, format);
2075 vfprintf_filtered (gdb_stdout, format, args);
2081 printf_unfiltered (const char *format, ...)
2085 va_start (args, format);
2086 vfprintf_unfiltered (gdb_stdout, format, args);
2090 /* Like printf_filtered, but prints it's result indented.
2091 Called as printfi_filtered (spaces, format, ...); */
2094 printfi_filtered (int spaces, const char *format, ...)
2098 va_start (args, format);
2099 print_spaces_filtered (spaces, gdb_stdout);
2100 vfprintf_filtered (gdb_stdout, format, args);
2104 /* Easy -- but watch out!
2106 This routine is *not* a replacement for puts()! puts() appends a newline.
2107 This one doesn't, and had better not! */
2110 puts_filtered (const char *string)
2112 fputs_filtered (string, gdb_stdout);
2116 puts_unfiltered (const char *string)
2118 fputs_unfiltered (string, gdb_stdout);
2121 /* Return a pointer to N spaces and a null. The pointer is good
2122 until the next call to here. */
2127 static char *spaces = 0;
2128 static int max_spaces = -1;
2134 spaces = (char *) xmalloc (n + 1);
2135 for (t = spaces + n; t != spaces;)
2141 return spaces + max_spaces - n;
2144 /* Print N spaces. */
2146 print_spaces_filtered (int n, struct ui_file *stream)
2148 fputs_filtered (n_spaces (n), stream);
2151 /* C++/ObjC demangler stuff. */
2153 /* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language
2154 LANG, using demangling args ARG_MODE, and print it filtered to STREAM.
2155 If the name is not mangled, or the language for the name is unknown, or
2156 demangling is off, the name is printed in its "raw" form. */
2159 fprintf_symbol_filtered (struct ui_file *stream, const char *name,
2160 enum language lang, int arg_mode)
2166 /* If user wants to see raw output, no problem. */
2169 fputs_filtered (name, stream);
2173 demangled = language_demangle (language_def (lang), name, arg_mode);
2174 fputs_filtered (demangled ? demangled : name, stream);
2175 if (demangled != NULL)
2183 /* Modes of operation for strncmp_iw_with_mode. */
2185 enum class strncmp_iw_mode
2187 /* Work like strncmp, while ignoring whitespace. */
2190 /* Like NORMAL, but also apply the strcmp_iw hack. I.e.,
2191 string1=="FOO(PARAMS)" matches string2=="FOO". */
2195 /* Helper for strncmp_iw and strcmp_iw. */
2198 strncmp_iw_with_mode (const char *string1, const char *string2,
2199 size_t string2_len, strncmp_iw_mode mode)
2201 const char *end_str2 = string2 + string2_len;
2205 while (isspace (*string1))
2207 while (string2 < end_str2 && isspace (*string2))
2209 if (*string1 == '\0' || string2 == end_str2)
2211 if (case_sensitivity == case_sensitive_on && *string1 != *string2)
2213 if (case_sensitivity == case_sensitive_off
2214 && (tolower ((unsigned char) *string1)
2215 != tolower ((unsigned char) *string2)))
2222 if (string2 == end_str2)
2224 if (mode == strncmp_iw_mode::NORMAL)
2227 return (*string1 != '\0' && *string1 != '(');
2236 strncmp_iw (const char *string1, const char *string2, size_t string2_len)
2238 return strncmp_iw_with_mode (string1, string2, string2_len,
2239 strncmp_iw_mode::NORMAL);
2245 strcmp_iw (const char *string1, const char *string2)
2247 return strncmp_iw_with_mode (string1, string2, strlen (string2),
2248 strncmp_iw_mode::MATCH_PARAMS);
2251 /* This is like strcmp except that it ignores whitespace and treats
2252 '(' as the first non-NULL character in terms of ordering. Like
2253 strcmp (and unlike strcmp_iw), it returns negative if STRING1 <
2254 STRING2, 0 if STRING2 = STRING2, and positive if STRING1 > STRING2
2255 according to that ordering.
2257 If a list is sorted according to this function and if you want to
2258 find names in the list that match some fixed NAME according to
2259 strcmp_iw(LIST_ELT, NAME), then the place to start looking is right
2260 where this function would put NAME.
2262 This function must be neutral to the CASE_SENSITIVITY setting as the user
2263 may choose it during later lookup. Therefore this function always sorts
2264 primarily case-insensitively and secondarily case-sensitively.
2266 Here are some examples of why using strcmp to sort is a bad idea:
2270 Say your partial symtab contains: "foo<char *>", "goo". Then, if
2271 we try to do a search for "foo<char*>", strcmp will locate this
2272 after "foo<char *>" and before "goo". Then lookup_partial_symbol
2273 will start looking at strings beginning with "goo", and will never
2274 see the correct match of "foo<char *>".
2276 Parenthesis example:
2278 In practice, this is less like to be an issue, but I'll give it a
2279 shot. Let's assume that '$' is a legitimate character to occur in
2280 symbols. (Which may well even be the case on some systems.) Then
2281 say that the partial symbol table contains "foo$" and "foo(int)".
2282 strcmp will put them in this order, since '$' < '('. Now, if the
2283 user searches for "foo", then strcmp will sort "foo" before "foo$".
2284 Then lookup_partial_symbol will notice that strcmp_iw("foo$",
2285 "foo") is false, so it won't proceed to the actual match of
2286 "foo(int)" with "foo". */
2289 strcmp_iw_ordered (const char *string1, const char *string2)
2291 const char *saved_string1 = string1, *saved_string2 = string2;
2292 enum case_sensitivity case_pass = case_sensitive_off;
2296 /* C1 and C2 are valid only if *string1 != '\0' && *string2 != '\0'.
2297 Provide stub characters if we are already at the end of one of the
2299 char c1 = 'X', c2 = 'X';
2301 while (*string1 != '\0' && *string2 != '\0')
2303 while (isspace (*string1))
2305 while (isspace (*string2))
2310 case case_sensitive_off:
2311 c1 = tolower ((unsigned char) *string1);
2312 c2 = tolower ((unsigned char) *string2);
2314 case case_sensitive_on:
2322 if (*string1 != '\0')
2331 /* Characters are non-equal unless they're both '\0'; we want to
2332 make sure we get the comparison right according to our
2333 comparison in the cases where one of them is '\0' or '('. */
2335 if (*string2 == '\0')
2340 if (*string2 == '\0')
2345 if (*string2 == '\0' || *string2 == '(')
2354 if (case_pass == case_sensitive_on)
2357 /* Otherwise the strings were equal in case insensitive way, make
2358 a more fine grained comparison in a case sensitive way. */
2360 case_pass = case_sensitive_on;
2361 string1 = saved_string1;
2362 string2 = saved_string2;
2366 /* A simple comparison function with opposite semantics to strcmp. */
2369 streq (const char *lhs, const char *rhs)
2371 return !strcmp (lhs, rhs);
2377 ** Answer whether string_to_compare is a full or partial match to
2378 ** template_string. The partial match must be in sequence starting
2382 subset_compare (const char *string_to_compare, const char *template_string)
2386 if (template_string != (char *) NULL && string_to_compare != (char *) NULL
2387 && strlen (string_to_compare) <= strlen (template_string))
2389 (startswith (template_string, string_to_compare));
2396 show_debug_timestamp (struct ui_file *file, int from_tty,
2397 struct cmd_list_element *c, const char *value)
2399 fprintf_filtered (file, _("Timestamping debugging messages is %s.\n"),
2405 initialize_utils (void)
2407 add_setshow_uinteger_cmd ("width", class_support, &chars_per_line, _("\
2408 Set number of characters where GDB should wrap lines of its output."), _("\
2409 Show number of characters where GDB should wrap lines of its output."), _("\
2410 This affects where GDB wraps its output to fit the screen width.\n\
2411 Setting this to \"unlimited\" or zero prevents GDB from wrapping its output."),
2413 show_chars_per_line,
2414 &setlist, &showlist);
2416 add_setshow_uinteger_cmd ("height", class_support, &lines_per_page, _("\
2417 Set number of lines in a page for GDB output pagination."), _("\
2418 Show number of lines in a page for GDB output pagination."), _("\
2419 This affects the number of lines after which GDB will pause\n\
2420 its output and ask you whether to continue.\n\
2421 Setting this to \"unlimited\" or zero causes GDB never pause during output."),
2423 show_lines_per_page,
2424 &setlist, &showlist);
2426 add_setshow_boolean_cmd ("pagination", class_support,
2427 &pagination_enabled, _("\
2428 Set state of GDB output pagination."), _("\
2429 Show state of GDB output pagination."), _("\
2430 When pagination is ON, GDB pauses at end of each screenful of\n\
2431 its output and asks you whether to continue.\n\
2432 Turning pagination off is an alternative to \"set height unlimited\"."),
2434 show_pagination_enabled,
2435 &setlist, &showlist);
2437 add_setshow_boolean_cmd ("sevenbit-strings", class_support,
2438 &sevenbit_strings, _("\
2439 Set printing of 8-bit characters in strings as \\nnn."), _("\
2440 Show printing of 8-bit characters in strings as \\nnn."), NULL,
2442 show_sevenbit_strings,
2443 &setprintlist, &showprintlist);
2445 add_setshow_boolean_cmd ("timestamp", class_maintenance,
2446 &debug_timestamp, _("\
2447 Set timestamping of debugging messages."), _("\
2448 Show timestamping of debugging messages."), _("\
2449 When set, debugging messages will be marked with seconds and microseconds."),
2451 show_debug_timestamp,
2452 &setdebuglist, &showdebuglist);
2456 paddress (struct gdbarch *gdbarch, CORE_ADDR addr)
2458 /* Truncate address to the size of a target address, avoiding shifts
2459 larger or equal than the width of a CORE_ADDR. The local
2460 variable ADDR_BIT stops the compiler reporting a shift overflow
2461 when it won't occur. */
2462 /* NOTE: This assumes that the significant address information is
2463 kept in the least significant bits of ADDR - the upper bits were
2464 either zero or sign extended. Should gdbarch_address_to_pointer or
2465 some ADDRESS_TO_PRINTABLE() be used to do the conversion? */
2467 int addr_bit = gdbarch_addr_bit (gdbarch);
2469 if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))
2470 addr &= ((CORE_ADDR) 1 << addr_bit) - 1;
2471 return hex_string (addr);
2474 /* This function is described in "defs.h". */
2477 print_core_address (struct gdbarch *gdbarch, CORE_ADDR address)
2479 int addr_bit = gdbarch_addr_bit (gdbarch);
2481 if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))
2482 address &= ((CORE_ADDR) 1 << addr_bit) - 1;
2484 /* FIXME: cagney/2002-05-03: Need local_address_string() function
2485 that returns the language localized string formatted to a width
2486 based on gdbarch_addr_bit. */
2488 return hex_string_custom (address, 8);
2490 return hex_string_custom (address, 16);
2493 /* Callback hash_f for htab_create_alloc or htab_create_alloc_ex. */
2496 core_addr_hash (const void *ap)
2498 const CORE_ADDR *addrp = (const CORE_ADDR *) ap;
2503 /* Callback eq_f for htab_create_alloc or htab_create_alloc_ex. */
2506 core_addr_eq (const void *ap, const void *bp)
2508 const CORE_ADDR *addr_ap = (const CORE_ADDR *) ap;
2509 const CORE_ADDR *addr_bp = (const CORE_ADDR *) bp;
2511 return *addr_ap == *addr_bp;
2514 /* Convert a string back into a CORE_ADDR. */
2516 string_to_core_addr (const char *my_string)
2520 if (my_string[0] == '0' && tolower (my_string[1]) == 'x')
2522 /* Assume that it is in hex. */
2525 for (i = 2; my_string[i] != '\0'; i++)
2527 if (isdigit (my_string[i]))
2528 addr = (my_string[i] - '0') + (addr * 16);
2529 else if (isxdigit (my_string[i]))
2530 addr = (tolower (my_string[i]) - 'a' + 0xa) + (addr * 16);
2532 error (_("invalid hex \"%s\""), my_string);
2537 /* Assume that it is in decimal. */
2540 for (i = 0; my_string[i] != '\0'; i++)
2542 if (isdigit (my_string[i]))
2543 addr = (my_string[i] - '0') + (addr * 10);
2545 error (_("invalid decimal \"%s\""), my_string);
2552 gdb::unique_xmalloc_ptr<char>
2553 gdb_realpath (const char *filename)
2555 /* On most hosts, we rely on canonicalize_file_name to compute
2556 the FILENAME's realpath.
2558 But the situation is slightly more complex on Windows, due to some
2559 versions of GCC which were reported to generate paths where
2560 backlashes (the directory separator) were doubled. For instance:
2561 c:\\some\\double\\slashes\\dir
2563 c:\some\double\slashes\dir
2564 Those double-slashes were getting in the way when comparing paths,
2565 for instance when trying to insert a breakpoint as follow:
2566 (gdb) b c:/some/double/slashes/dir/foo.c:4
2567 No source file named c:/some/double/slashes/dir/foo.c:4.
2568 (gdb) b c:\some\double\slashes\dir\foo.c:4
2569 No source file named c:\some\double\slashes\dir\foo.c:4.
2570 To prevent this from happening, we need this function to always
2571 strip those extra backslashes. While canonicalize_file_name does
2572 perform this simplification, it only works when the path is valid.
2573 Since the simplification would be useful even if the path is not
2574 valid (one can always set a breakpoint on a file, even if the file
2575 does not exist locally), we rely instead on GetFullPathName to
2576 perform the canonicalization. */
2578 #if defined (_WIN32)
2581 DWORD len = GetFullPathName (filename, MAX_PATH, buf, NULL);
2583 /* The file system is case-insensitive but case-preserving.
2584 So it is important we do not lowercase the path. Otherwise,
2585 we might not be able to display the original casing in a given
2587 if (len > 0 && len < MAX_PATH)
2588 return gdb::unique_xmalloc_ptr<char> (xstrdup (buf));
2592 char *rp = canonicalize_file_name (filename);
2595 return gdb::unique_xmalloc_ptr<char> (rp);
2599 /* This system is a lost cause, just dup the buffer. */
2600 return gdb::unique_xmalloc_ptr<char> (xstrdup (filename));
2606 gdb_realpath_check_trailer (const char *input, const char *trailer)
2608 gdb::unique_xmalloc_ptr<char> result = gdb_realpath (input);
2610 size_t len = strlen (result.get ());
2611 size_t trail_len = strlen (trailer);
2613 SELF_CHECK (len >= trail_len
2614 && strcmp (result.get () + len - trail_len, trailer) == 0);
2618 gdb_realpath_tests ()
2620 /* A file which contains a directory prefix. */
2621 gdb_realpath_check_trailer ("./xfullpath.exp", "/xfullpath.exp");
2622 /* A file which contains a directory prefix. */
2623 gdb_realpath_check_trailer ("../../defs.h", "/defs.h");
2624 /* A one-character filename. */
2625 gdb_realpath_check_trailer ("./a", "/a");
2626 /* A file in the root directory. */
2627 gdb_realpath_check_trailer ("/root_file_which_should_exist",
2628 "/root_file_which_should_exist");
2629 /* A file which does not have a directory prefix. */
2630 gdb_realpath_check_trailer ("xfullpath.exp", "xfullpath.exp");
2631 /* A one-char filename without any directory prefix. */
2632 gdb_realpath_check_trailer ("a", "a");
2633 /* An empty filename. */
2634 gdb_realpath_check_trailer ("", "");
2637 #endif /* GDB_SELF_TEST */
2639 /* Return a copy of FILENAME, with its directory prefix canonicalized
2642 gdb::unique_xmalloc_ptr<char>
2643 gdb_realpath_keepfile (const char *filename)
2645 const char *base_name = lbasename (filename);
2649 /* Extract the basename of filename, and return immediately
2650 a copy of filename if it does not contain any directory prefix. */
2651 if (base_name == filename)
2652 return gdb::unique_xmalloc_ptr<char> (xstrdup (filename));
2654 dir_name = (char *) alloca ((size_t) (base_name - filename + 2));
2655 /* Allocate enough space to store the dir_name + plus one extra
2656 character sometimes needed under Windows (see below), and
2657 then the closing \000 character. */
2658 strncpy (dir_name, filename, base_name - filename);
2659 dir_name[base_name - filename] = '\000';
2661 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
2662 /* We need to be careful when filename is of the form 'd:foo', which
2663 is equivalent of d:./foo, which is totally different from d:/foo. */
2664 if (strlen (dir_name) == 2 && isalpha (dir_name[0]) && dir_name[1] == ':')
2667 dir_name[3] = '\000';
2671 /* Canonicalize the directory prefix, and build the resulting
2672 filename. If the dirname realpath already contains an ending
2673 directory separator, avoid doubling it. */
2674 gdb::unique_xmalloc_ptr<char> path_storage = gdb_realpath (dir_name);
2675 const char *real_path = path_storage.get ();
2676 if (IS_DIR_SEPARATOR (real_path[strlen (real_path) - 1]))
2677 result = concat (real_path, base_name, (char *) NULL);
2679 result = concat (real_path, SLASH_STRING, base_name, (char *) NULL);
2681 return gdb::unique_xmalloc_ptr<char> (result);
2684 /* Return PATH in absolute form, performing tilde-expansion if necessary.
2685 PATH cannot be NULL or the empty string.
2686 This does not resolve symlinks however, use gdb_realpath for that. */
2688 gdb::unique_xmalloc_ptr<char>
2689 gdb_abspath (const char *path)
2691 gdb_assert (path != NULL && path[0] != '\0');
2694 return gdb::unique_xmalloc_ptr<char> (tilde_expand (path));
2696 if (IS_ABSOLUTE_PATH (path))
2697 return gdb::unique_xmalloc_ptr<char> (xstrdup (path));
2699 /* Beware the // my son, the Emacs barfs, the botch that catch... */
2700 return gdb::unique_xmalloc_ptr<char>
2701 (concat (current_directory,
2702 IS_DIR_SEPARATOR (current_directory[strlen (current_directory) - 1])
2703 ? "" : SLASH_STRING,
2704 path, (char *) NULL));
2708 align_up (ULONGEST v, int n)
2710 /* Check that N is really a power of two. */
2711 gdb_assert (n && (n & (n-1)) == 0);
2712 return (v + n - 1) & -n;
2716 align_down (ULONGEST v, int n)
2718 /* Check that N is really a power of two. */
2719 gdb_assert (n && (n & (n-1)) == 0);
2723 /* Allocation function for the libiberty hash table which uses an
2724 obstack. The obstack is passed as DATA. */
2727 hashtab_obstack_allocate (void *data, size_t size, size_t count)
2729 size_t total = size * count;
2730 void *ptr = obstack_alloc ((struct obstack *) data, total);
2732 memset (ptr, 0, total);
2736 /* Trivial deallocation function for the libiberty splay tree and hash
2737 table - don't deallocate anything. Rely on later deletion of the
2738 obstack. DATA will be the obstack, although it is not needed
2742 dummy_obstack_deallocate (void *object, void *data)
2747 /* Simple, portable version of dirname that does not modify its
2751 ldirname (const char *filename)
2753 std::string dirname;
2754 const char *base = lbasename (filename);
2756 while (base > filename && IS_DIR_SEPARATOR (base[-1]))
2759 if (base == filename)
2762 dirname = std::string (filename, base - filename);
2764 /* On DOS based file systems, convert "d:foo" to "d:.", so that we
2765 create "d:./bar" later instead of the (different) "d:/bar". */
2766 if (base - filename == 2 && IS_ABSOLUTE_PATH (base)
2767 && !IS_DIR_SEPARATOR (filename[0]))
2768 dirname[base++ - filename] = '.';
2776 gdb_argv::reset (const char *s)
2778 char **argv = buildargv (s);
2780 if (s != NULL && argv == NULL)
2788 compare_positive_ints (const void *ap, const void *bp)
2790 /* Because we know we're comparing two ints which are positive,
2791 there's no danger of overflow here. */
2792 return * (int *) ap - * (int *) bp;
2795 /* String compare function for qsort. */
2798 compare_strings (const void *arg1, const void *arg2)
2800 const char **s1 = (const char **) arg1;
2801 const char **s2 = (const char **) arg2;
2803 return strcmp (*s1, *s2);
2806 #define AMBIGUOUS_MESS1 ".\nMatching formats:"
2807 #define AMBIGUOUS_MESS2 \
2808 ".\nUse \"set gnutarget format-name\" to specify the format."
2811 gdb_bfd_errmsg (bfd_error_type error_tag, char **matching)
2817 /* Check if errmsg just need simple return. */
2818 if (error_tag != bfd_error_file_ambiguously_recognized || matching == NULL)
2819 return bfd_errmsg (error_tag);
2821 ret_len = strlen (bfd_errmsg (error_tag)) + strlen (AMBIGUOUS_MESS1)
2822 + strlen (AMBIGUOUS_MESS2);
2823 for (p = matching; *p; p++)
2824 ret_len += strlen (*p) + 1;
2825 ret = (char *) xmalloc (ret_len + 1);
2827 make_cleanup (xfree, ret);
2829 strcpy (retp, bfd_errmsg (error_tag));
2830 retp += strlen (retp);
2832 strcpy (retp, AMBIGUOUS_MESS1);
2833 retp += strlen (retp);
2835 for (p = matching; *p; p++)
2837 sprintf (retp, " %s", *p);
2838 retp += strlen (retp);
2842 strcpy (retp, AMBIGUOUS_MESS2);
2847 /* Return ARGS parsed as a valid pid, or throw an error. */
2850 parse_pid_to_attach (const char *args)
2856 error_no_arg (_("process-id to attach"));
2858 dummy = (char *) args;
2859 pid = strtoul (args, &dummy, 0);
2860 /* Some targets don't set errno on errors, grrr! */
2861 if ((pid == 0 && dummy == args) || dummy != &args[strlen (args)])
2862 error (_("Illegal process-id: %s."), args);
2867 /* Helper for make_bpstat_clear_actions_cleanup. */
2870 do_bpstat_clear_actions_cleanup (void *unused)
2872 bpstat_clear_actions ();
2875 /* Call bpstat_clear_actions for the case an exception is throw. You should
2876 discard_cleanups if no exception is caught. */
2879 make_bpstat_clear_actions_cleanup (void)
2881 return make_cleanup (do_bpstat_clear_actions_cleanup, NULL);
2885 /* Helper for make_cleanup_free_char_ptr_vec. */
2888 do_free_char_ptr_vec (void *arg)
2890 VEC (char_ptr) *char_ptr_vec = (VEC (char_ptr) *) arg;
2892 free_char_ptr_vec (char_ptr_vec);
2895 /* Make cleanup handler calling xfree for each element of CHAR_PTR_VEC and
2896 final VEC_free for CHAR_PTR_VEC itself.
2898 You must not modify CHAR_PTR_VEC after this cleanup registration as the
2899 CHAR_PTR_VEC base address may change on its updates. Contrary to VEC_free
2900 this function does not (cannot) clear the pointer. */
2903 make_cleanup_free_char_ptr_vec (VEC (char_ptr) *char_ptr_vec)
2905 return make_cleanup (do_free_char_ptr_vec, char_ptr_vec);
2908 /* Substitute all occurences of string FROM by string TO in *STRINGP. *STRINGP
2909 must come from xrealloc-compatible allocator and it may be updated. FROM
2910 needs to be delimited by IS_DIR_SEPARATOR or DIRNAME_SEPARATOR (or be
2911 located at the start or end of *STRINGP. */
2914 substitute_path_component (char **stringp, const char *from, const char *to)
2916 char *string = *stringp, *s;
2917 const size_t from_len = strlen (from);
2918 const size_t to_len = strlen (to);
2922 s = strstr (s, from);
2926 if ((s == string || IS_DIR_SEPARATOR (s[-1])
2927 || s[-1] == DIRNAME_SEPARATOR)
2928 && (s[from_len] == '\0' || IS_DIR_SEPARATOR (s[from_len])
2929 || s[from_len] == DIRNAME_SEPARATOR))
2934 = (char *) xrealloc (string, (strlen (string) + to_len + 1));
2936 /* Relocate the current S pointer. */
2937 s = s - string + string_new;
2938 string = string_new;
2940 /* Replace from by to. */
2941 memmove (&s[to_len], &s[from_len], strlen (&s[from_len]) + 1);
2942 memcpy (s, to, to_len);
2957 /* SIGALRM handler for waitpid_with_timeout. */
2960 sigalrm_handler (int signo)
2962 /* Nothing to do. */
2967 /* Wrapper to wait for child PID to die with TIMEOUT.
2968 TIMEOUT is the time to stop waiting in seconds.
2969 If TIMEOUT is zero, pass WNOHANG to waitpid.
2970 Returns PID if it was successfully waited for, otherwise -1.
2972 Timeouts are currently implemented with alarm and SIGALRM.
2973 If the host does not support them, this waits "forever".
2974 It would be odd though for a host to have waitpid and not SIGALRM. */
2977 wait_to_die_with_timeout (pid_t pid, int *status, int timeout)
2979 pid_t waitpid_result;
2981 gdb_assert (pid > 0);
2982 gdb_assert (timeout >= 0);
2987 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
2988 struct sigaction sa, old_sa;
2990 sa.sa_handler = sigalrm_handler;
2991 sigemptyset (&sa.sa_mask);
2993 sigaction (SIGALRM, &sa, &old_sa);
2997 ofunc = signal (SIGALRM, sigalrm_handler);
3003 waitpid_result = waitpid (pid, status, 0);
3007 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
3008 sigaction (SIGALRM, &old_sa, NULL);
3010 signal (SIGALRM, ofunc);
3015 waitpid_result = waitpid (pid, status, WNOHANG);
3017 if (waitpid_result == pid)
3023 #endif /* HAVE_WAITPID */
3025 /* Provide fnmatch compatible function for FNM_FILE_NAME matching of host files.
3026 Both FNM_FILE_NAME and FNM_NOESCAPE must be set in FLAGS.
3028 It handles correctly HAVE_DOS_BASED_FILE_SYSTEM and
3029 HAVE_CASE_INSENSITIVE_FILE_SYSTEM. */
3032 gdb_filename_fnmatch (const char *pattern, const char *string, int flags)
3034 gdb_assert ((flags & FNM_FILE_NAME) != 0);
3036 /* It is unclear how '\' escaping vs. directory separator should coexist. */
3037 gdb_assert ((flags & FNM_NOESCAPE) != 0);
3039 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
3041 char *pattern_slash, *string_slash;
3043 /* Replace '\' by '/' in both strings. */
3045 pattern_slash = (char *) alloca (strlen (pattern) + 1);
3046 strcpy (pattern_slash, pattern);
3047 pattern = pattern_slash;
3048 for (; *pattern_slash != 0; pattern_slash++)
3049 if (IS_DIR_SEPARATOR (*pattern_slash))
3050 *pattern_slash = '/';
3052 string_slash = (char *) alloca (strlen (string) + 1);
3053 strcpy (string_slash, string);
3054 string = string_slash;
3055 for (; *string_slash != 0; string_slash++)
3056 if (IS_DIR_SEPARATOR (*string_slash))
3057 *string_slash = '/';
3059 #endif /* HAVE_DOS_BASED_FILE_SYSTEM */
3061 #ifdef HAVE_CASE_INSENSITIVE_FILE_SYSTEM
3062 flags |= FNM_CASEFOLD;
3063 #endif /* HAVE_CASE_INSENSITIVE_FILE_SYSTEM */
3065 return fnmatch (pattern, string, flags);
3068 /* Return the number of path elements in PATH.
3076 count_path_elements (const char *path)
3079 const char *p = path;
3081 if (HAS_DRIVE_SPEC (p))
3083 p = STRIP_DRIVE_SPEC (p);
3089 if (IS_DIR_SEPARATOR (*p))
3094 /* Backup one if last character is /, unless it's the only one. */
3095 if (p > path + 1 && IS_DIR_SEPARATOR (p[-1]))
3098 /* Add one for the file name, if present. */
3099 if (p > path && !IS_DIR_SEPARATOR (p[-1]))
3105 /* Remove N leading path elements from PATH.
3106 N must be non-negative.
3107 If PATH has more than N path elements then return NULL.
3108 If PATH has exactly N path elements then return "".
3109 See count_path_elements for a description of how we do the counting. */
3112 strip_leading_path_elements (const char *path, int n)
3115 const char *p = path;
3117 gdb_assert (n >= 0);
3122 if (HAS_DRIVE_SPEC (p))
3124 p = STRIP_DRIVE_SPEC (p);
3130 while (*p != '\0' && !IS_DIR_SEPARATOR (*p))
3146 _initialize_utils (void)
3148 add_internal_problem_command (&internal_error_problem);
3149 add_internal_problem_command (&internal_warning_problem);
3150 add_internal_problem_command (&demangler_warning_problem);
3153 selftests::register_test ("gdb_realpath", gdb_realpath_tests);