1 /* General utility routines for GDB, the GNU debugger.
3 Copyright (C) 1986-2018 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"
71 #include "cp-support.h"
73 #include "common/pathstuff.h"
76 extern PTR
malloc (); /* ARI: PTR */
78 #if !HAVE_DECL_REALLOC
79 extern PTR
realloc (); /* ARI: PTR */
85 void (*deprecated_error_begin_hook
) (void);
87 /* Prototypes for local functions */
89 static void vfprintf_maybe_filtered (struct ui_file
*, const char *,
90 va_list, int) ATTRIBUTE_PRINTF (2, 0);
92 static void fputs_maybe_filtered (const char *, struct ui_file
*, int);
94 static void prompt_for_continue (void);
96 static void set_screen_size (void);
97 static void set_width (void);
99 /* Time spent in prompt_for_continue in the currently executing command
100 waiting for user to respond.
101 Initialized in make_command_stats_cleanup.
102 Modified in prompt_for_continue and defaulted_query.
103 Used in report_command_stats. */
105 static std::chrono::steady_clock::duration prompt_for_continue_wait_time
;
107 /* A flag indicating whether to timestamp debugging messages. */
109 static int debug_timestamp
= 0;
111 /* Nonzero means that strings with character values >0x7F should be printed
112 as octal escapes. Zero means just print the value (e.g. it's an
113 international character, and the terminal or window can cope.) */
115 int sevenbit_strings
= 0;
117 show_sevenbit_strings (struct ui_file
*file
, int from_tty
,
118 struct cmd_list_element
*c
, const char *value
)
120 fprintf_filtered (file
, _("Printing of 8-bit characters "
121 "in strings as \\nnn is %s.\n"),
125 /* String to be printed before warning messages, if any. */
127 const char *warning_pre_print
= "\nwarning: ";
129 int pagination_enabled
= 1;
131 show_pagination_enabled (struct ui_file
*file
, int from_tty
,
132 struct cmd_list_element
*c
, const char *value
)
134 fprintf_filtered (file
, _("State of pagination is %s.\n"), value
);
138 /* Cleanup utilities.
140 These are not defined in cleanups.c (nor declared in cleanups.h)
141 because while they use the "cleanup API" they are not part of the
144 /* Helper for make_cleanup_value_free_to_mark. */
147 do_value_free_to_mark (void *value
)
149 value_free_to_mark ((struct value
*) value
);
152 /* Free all values allocated since MARK was obtained by value_mark
153 (except for those released) when the cleanup is run. */
156 make_cleanup_value_free_to_mark (struct value
*mark
)
158 return make_cleanup (do_value_free_to_mark
, mark
);
161 /* This function is useful for cleanups.
165 old_chain = make_cleanup (free_current_contents, &foo);
167 to arrange to free the object thus allocated. */
170 free_current_contents (void *ptr
)
172 void **location
= (void **) ptr
;
174 if (location
== NULL
)
175 internal_error (__FILE__
, __LINE__
,
176 _("free_current_contents: NULL pointer"));
177 if (*location
!= NULL
)
186 /* Print a warning message. The first argument STRING is the warning
187 message, used as an fprintf format string, the second is the
188 va_list of arguments for that string. A warning is unfiltered (not
189 paginated) so that the user does not need to page through each
190 screen full of warnings when there are lots of them. */
193 vwarning (const char *string
, va_list args
)
195 if (deprecated_warning_hook
)
196 (*deprecated_warning_hook
) (string
, args
);
199 gdb::optional
<target_terminal::scoped_restore_terminal_state
> term_state
;
200 if (target_supports_terminal_ours ())
202 term_state
.emplace ();
203 target_terminal::ours_for_output ();
205 if (filtered_printing_initialized ())
206 wrap_here (""); /* Force out any buffered output. */
207 gdb_flush (gdb_stdout
);
208 if (warning_pre_print
)
209 fputs_unfiltered (warning_pre_print
, gdb_stderr
);
210 vfprintf_unfiltered (gdb_stderr
, string
, args
);
211 fprintf_unfiltered (gdb_stderr
, "\n");
215 /* Print an error message and return to command level.
216 The first argument STRING is the error message, used as a fprintf string,
217 and the remaining args are passed as arguments to it. */
220 verror (const char *string
, va_list args
)
222 throw_verror (GENERIC_ERROR
, string
, args
);
226 error_stream (const string_file
&stream
)
228 error (("%s"), stream
.c_str ());
231 /* Emit a message and abort. */
233 static void ATTRIBUTE_NORETURN
234 abort_with_message (const char *msg
)
236 if (current_ui
== NULL
)
239 fputs_unfiltered (msg
, gdb_stderr
);
241 abort (); /* NOTE: GDB has only three calls to abort(). */
244 /* Dump core trying to increase the core soft limit to hard limit first. */
249 #ifdef HAVE_SETRLIMIT
250 struct rlimit rlim
= { RLIM_INFINITY
, RLIM_INFINITY
};
252 setrlimit (RLIMIT_CORE
, &rlim
);
253 #endif /* HAVE_SETRLIMIT */
255 abort (); /* NOTE: GDB has only three calls to abort(). */
258 /* Check whether GDB will be able to dump core using the dump_core
259 function. Returns zero if GDB cannot or should not dump core.
260 If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected.
261 If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */
264 can_dump_core (enum resource_limit_kind limit_kind
)
266 #ifdef HAVE_GETRLIMIT
269 /* Be quiet and assume we can dump if an error is returned. */
270 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
276 if (rlim
.rlim_cur
== 0)
281 if (rlim
.rlim_max
== 0)
284 #endif /* HAVE_GETRLIMIT */
289 /* Print a warning that we cannot dump core. */
292 warn_cant_dump_core (const char *reason
)
294 fprintf_unfiltered (gdb_stderr
,
295 _("%s\nUnable to dump core, use `ulimit -c"
296 " unlimited' before executing GDB next time.\n"),
300 /* Check whether GDB will be able to dump core using the dump_core
301 function, and print a warning if we cannot. */
304 can_dump_core_warn (enum resource_limit_kind limit_kind
,
307 int core_dump_allowed
= can_dump_core (limit_kind
);
309 if (!core_dump_allowed
)
310 warn_cant_dump_core (reason
);
312 return core_dump_allowed
;
315 /* Allow the user to configure the debugger behavior with respect to
316 what to do when an internal problem is detected. */
318 const char internal_problem_ask
[] = "ask";
319 const char internal_problem_yes
[] = "yes";
320 const char internal_problem_no
[] = "no";
321 static const char *const internal_problem_modes
[] =
323 internal_problem_ask
,
324 internal_problem_yes
,
329 /* Print a message reporting an internal error/warning. Ask the user
330 if they want to continue, dump core, or just exit. Return
331 something to indicate a quit. */
333 struct internal_problem
336 int user_settable_should_quit
;
337 const char *should_quit
;
338 int user_settable_should_dump_core
;
339 const char *should_dump_core
;
342 /* Report a problem, internal to GDB, to the user. Once the problem
343 has been reported, and assuming GDB didn't quit, the caller can
344 either allow execution to resume or throw an error. */
346 static void ATTRIBUTE_PRINTF (4, 0)
347 internal_vproblem (struct internal_problem
*problem
,
348 const char *file
, int line
, const char *fmt
, va_list ap
)
355 /* Don't allow infinite error/warning recursion. */
357 static char msg
[] = "Recursive internal problem.\n";
366 abort_with_message (msg
);
369 /* Newer GLIBC versions put the warn_unused_result attribute
370 on write, but this is one of those rare cases where
371 ignoring the return value is correct. Casting to (void)
372 does not fix this problem. This is the solution suggested
373 at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509. */
374 if (write (STDERR_FILENO
, msg
, sizeof (msg
)) != sizeof (msg
))
375 abort (); /* NOTE: GDB has only three calls to abort(). */
380 /* Create a string containing the full error/warning message. Need
381 to call query with this full string, as otherwize the reason
382 (error/warning) and question become separated. Format using a
383 style similar to a compiler error message. Include extra detail
384 so that the user knows that they are living on the edge. */
386 std::string msg
= string_vprintf (fmt
, ap
);
387 reason
= string_printf ("%s:%d: %s: %s\n"
388 "A problem internal to GDB has been detected,\n"
389 "further debugging may prove unreliable.",
390 file
, line
, problem
->name
, msg
.c_str ());
393 /* Fall back to abort_with_message if gdb_stderr is not set up. */
394 if (current_ui
== NULL
)
396 fputs (reason
.c_str (), stderr
);
397 abort_with_message ("\n");
400 /* Try to get the message out and at the start of a new line. */
401 gdb::optional
<target_terminal::scoped_restore_terminal_state
> term_state
;
402 if (target_supports_terminal_ours ())
404 term_state
.emplace ();
405 target_terminal::ours_for_output ();
407 if (filtered_printing_initialized ())
410 /* Emit the message unless query will emit it below. */
411 if (problem
->should_quit
!= internal_problem_ask
413 || !filtered_printing_initialized ())
414 fprintf_unfiltered (gdb_stderr
, "%s\n", reason
.c_str ());
416 if (problem
->should_quit
== internal_problem_ask
)
418 /* Default (yes/batch case) is to quit GDB. When in batch mode
419 this lessens the likelihood of GDB going into an infinite
421 if (!confirm
|| !filtered_printing_initialized ())
424 quit_p
= query (_("%s\nQuit this debugging session? "),
427 else if (problem
->should_quit
== internal_problem_yes
)
429 else if (problem
->should_quit
== internal_problem_no
)
432 internal_error (__FILE__
, __LINE__
, _("bad switch"));
434 fputs_unfiltered (_("\nThis is a bug, please report it."), gdb_stderr
);
435 if (REPORT_BUGS_TO
[0])
436 fprintf_unfiltered (gdb_stderr
, _(" For instructions, see:\n%s."),
438 fputs_unfiltered ("\n\n", gdb_stderr
);
440 if (problem
->should_dump_core
== internal_problem_ask
)
442 if (!can_dump_core_warn (LIMIT_MAX
, reason
.c_str ()))
444 else if (!filtered_printing_initialized ())
448 /* Default (yes/batch case) is to dump core. This leaves a GDB
449 `dropping' so that it is easier to see that something went
451 dump_core_p
= query (_("%s\nCreate a core file of GDB? "),
455 else if (problem
->should_dump_core
== internal_problem_yes
)
456 dump_core_p
= can_dump_core_warn (LIMIT_MAX
, reason
.c_str ());
457 else if (problem
->should_dump_core
== internal_problem_no
)
460 internal_error (__FILE__
, __LINE__
, _("bad switch"));
473 #ifdef HAVE_WORKING_FORK
483 static struct internal_problem internal_error_problem
= {
484 "internal-error", 1, internal_problem_ask
, 1, internal_problem_ask
488 internal_verror (const char *file
, int line
, const char *fmt
, va_list ap
)
490 internal_vproblem (&internal_error_problem
, file
, line
, fmt
, ap
);
491 throw_quit (_("Command aborted."));
494 static struct internal_problem internal_warning_problem
= {
495 "internal-warning", 1, internal_problem_ask
, 1, internal_problem_ask
499 internal_vwarning (const char *file
, int line
, const char *fmt
, va_list ap
)
501 internal_vproblem (&internal_warning_problem
, file
, line
, fmt
, ap
);
504 static struct internal_problem demangler_warning_problem
= {
505 "demangler-warning", 1, internal_problem_ask
, 0, internal_problem_no
509 demangler_vwarning (const char *file
, int line
, const char *fmt
, va_list ap
)
511 internal_vproblem (&demangler_warning_problem
, file
, line
, fmt
, ap
);
515 demangler_warning (const char *file
, int line
, const char *string
, ...)
519 va_start (ap
, string
);
520 demangler_vwarning (file
, line
, string
, ap
);
524 /* Dummy functions to keep add_prefix_cmd happy. */
527 set_internal_problem_cmd (const char *args
, int from_tty
)
532 show_internal_problem_cmd (const char *args
, int from_tty
)
536 /* When GDB reports an internal problem (error or warning) it gives
537 the user the opportunity to quit GDB and/or create a core file of
538 the current debug session. This function registers a few commands
539 that make it possible to specify that GDB should always or never
540 quit or create a core file, without asking. The commands look
543 maint set PROBLEM-NAME quit ask|yes|no
544 maint show PROBLEM-NAME quit
545 maint set PROBLEM-NAME corefile ask|yes|no
546 maint show PROBLEM-NAME corefile
548 Where PROBLEM-NAME is currently "internal-error" or
549 "internal-warning". */
552 add_internal_problem_command (struct internal_problem
*problem
)
554 struct cmd_list_element
**set_cmd_list
;
555 struct cmd_list_element
**show_cmd_list
;
559 set_cmd_list
= XNEW (struct cmd_list_element
*);
560 show_cmd_list
= XNEW (struct cmd_list_element
*);
561 *set_cmd_list
= NULL
;
562 *show_cmd_list
= NULL
;
564 set_doc
= xstrprintf (_("Configure what GDB does when %s is detected."),
567 show_doc
= xstrprintf (_("Show what GDB does when %s is detected."),
570 add_prefix_cmd (problem
->name
,
571 class_maintenance
, set_internal_problem_cmd
, set_doc
,
573 concat ("maintenance set ", problem
->name
, " ",
575 0/*allow-unknown*/, &maintenance_set_cmdlist
);
577 add_prefix_cmd (problem
->name
,
578 class_maintenance
, show_internal_problem_cmd
, show_doc
,
580 concat ("maintenance show ", problem
->name
, " ",
582 0/*allow-unknown*/, &maintenance_show_cmdlist
);
584 if (problem
->user_settable_should_quit
)
586 set_doc
= xstrprintf (_("Set whether GDB should quit "
587 "when an %s is detected"),
589 show_doc
= xstrprintf (_("Show whether GDB will quit "
590 "when an %s is detected"),
592 add_setshow_enum_cmd ("quit", class_maintenance
,
593 internal_problem_modes
,
594 &problem
->should_quit
,
607 if (problem
->user_settable_should_dump_core
)
609 set_doc
= xstrprintf (_("Set whether GDB should create a core "
610 "file of GDB when %s is detected"),
612 show_doc
= xstrprintf (_("Show whether GDB will create a core "
613 "file of GDB when %s is detected"),
615 add_setshow_enum_cmd ("corefile", class_maintenance
,
616 internal_problem_modes
,
617 &problem
->should_dump_core
,
631 /* Return a newly allocated string, containing the PREFIX followed
632 by the system error message for errno (separated by a colon). */
635 perror_string (const char *prefix
)
639 err
= safe_strerror (errno
);
640 return std::string (prefix
) + ": " + err
;
643 /* Print the system error message for errno, and also mention STRING
644 as the file name for which the error was encountered. Use ERRCODE
645 for the thrown exception. Then return to command level. */
648 throw_perror_with_name (enum errors errcode
, const char *string
)
650 std::string combined
= perror_string (string
);
652 /* I understand setting these is a matter of taste. Still, some people
653 may clear errno but not know about bfd_error. Doing this here is not
655 bfd_set_error (bfd_error_no_error
);
658 throw_error (errcode
, _("%s."), combined
.c_str ());
661 /* See throw_perror_with_name, ERRCODE defaults here to GENERIC_ERROR. */
664 perror_with_name (const char *string
)
666 throw_perror_with_name (GENERIC_ERROR
, string
);
669 /* Same as perror_with_name except that it prints a warning instead
670 of throwing an error. */
673 perror_warning_with_name (const char *string
)
675 std::string combined
= perror_string (string
);
676 warning (_("%s"), combined
.c_str ());
679 /* Print the system error message for ERRCODE, and also mention STRING
680 as the file name for which the error was encountered. */
683 print_sys_errmsg (const char *string
, int errcode
)
688 err
= safe_strerror (errcode
);
689 combined
= (char *) alloca (strlen (err
) + strlen (string
) + 3);
690 strcpy (combined
, string
);
691 strcat (combined
, ": ");
692 strcat (combined
, err
);
694 /* We want anything which was printed on stdout to come out first, before
696 gdb_flush (gdb_stdout
);
697 fprintf_unfiltered (gdb_stderr
, "%s.\n", combined
);
700 /* Control C eventually causes this to be called, at a convenient time. */
705 if (sync_quit_force_run
)
707 sync_quit_force_run
= 0;
708 quit_force (NULL
, 0);
712 /* No steenking SIGINT will ever be coming our way when the
713 program is resumed. Don't lie. */
717 /* If there is no terminal switching for this target, then we can't
718 possibly get screwed by the lack of job control. */
719 || !target_supports_terminal_ours ())
722 throw_quit ("Quit (expect signal SIGINT when the program is resumed)");
731 if (sync_quit_force_run
)
736 if (deprecated_interactive_hook
)
737 deprecated_interactive_hook ();
741 /* Called when a memory allocation fails, with the number of bytes of
742 memory requested in SIZE. */
745 malloc_failure (long size
)
749 internal_error (__FILE__
, __LINE__
,
750 _("virtual memory exhausted: can't allocate %ld bytes."),
755 internal_error (__FILE__
, __LINE__
, _("virtual memory exhausted."));
759 /* My replacement for the read system call.
760 Used like `read' but keeps going if `read' returns too soon. */
763 myread (int desc
, char *addr
, int len
)
770 val
= read (desc
, addr
, len
);
782 print_spaces (int n
, struct ui_file
*file
)
784 fputs_unfiltered (n_spaces (n
), file
);
787 /* Print a host address. */
790 gdb_print_host_address_1 (const void *addr
, struct ui_file
*stream
)
792 fprintf_filtered (stream
, "%s", host_address_to_string (addr
));
798 make_hex_string (const gdb_byte
*data
, size_t length
)
800 char *result
= (char *) xmalloc (length
* 2 + 1);
805 for (i
= 0; i
< length
; ++i
)
806 p
+= xsnprintf (p
, 3, "%02x", data
[i
]);
813 /* An RAII class that sets up to handle input and then tears down
814 during destruction. */
816 class scoped_input_handler
820 scoped_input_handler ()
821 : m_quit_handler (&quit_handler
, default_quit_handler
),
824 target_terminal::ours ();
825 ui_register_input_event_handler (current_ui
);
826 if (current_ui
->prompt_state
== PROMPT_BLOCKED
)
830 ~scoped_input_handler ()
833 ui_unregister_input_event_handler (m_ui
);
836 DISABLE_COPY_AND_ASSIGN (scoped_input_handler
);
840 /* Save and restore the terminal state. */
841 target_terminal::scoped_restore_terminal_state m_term_state
;
843 /* Save and restore the quit handler. */
844 scoped_restore_tmpl
<quit_handler_ftype
*> m_quit_handler
;
846 /* The saved UI, if non-NULL. */
852 /* This function supports the query, nquery, and yquery functions.
853 Ask user a y-or-n question and return 0 if answer is no, 1 if
854 answer is yes, or default the answer to the specified default
855 (for yquery or nquery). DEFCHAR may be 'y' or 'n' to provide a
856 default answer, or '\0' for no default.
857 CTLSTR is the control string and should end in "? ". It should
858 not say how to answer, because we do that.
859 ARGS are the arguments passed along with the CTLSTR argument to
862 static int ATTRIBUTE_PRINTF (1, 0)
863 defaulted_query (const char *ctlstr
, const char defchar
, va_list args
)
867 char def_answer
, not_def_answer
;
868 const char *y_string
, *n_string
;
870 /* Set up according to which answer is the default. */
875 not_def_answer
= 'N';
879 else if (defchar
== 'y')
883 not_def_answer
= 'N';
891 not_def_answer
= 'Y';
896 /* Automatically answer the default value if the user did not want
897 prompts or the command was issued with the server prefix. */
898 if (!confirm
|| server_command
)
901 /* If input isn't coming from the user directly, just say what
902 question we're asking, and then answer the default automatically. This
903 way, important error messages don't get lost when talking to GDB
905 if (current_ui
->instream
!= current_ui
->stdin_stream
906 || !input_interactive_p (current_ui
)
907 /* Restrict queries to the main UI. */
908 || current_ui
!= main_ui
)
910 target_terminal::scoped_restore_terminal_state term_state
;
911 target_terminal::ours_for_output ();
913 vfprintf_filtered (gdb_stdout
, ctlstr
, args
);
915 printf_filtered (_("(%s or %s) [answered %c; "
916 "input not from terminal]\n"),
917 y_string
, n_string
, def_answer
);
918 gdb_flush (gdb_stdout
);
923 if (deprecated_query_hook
)
925 target_terminal::scoped_restore_terminal_state term_state
;
926 return deprecated_query_hook (ctlstr
, args
);
929 /* Format the question outside of the loop, to avoid reusing args. */
930 std::string question
= string_vprintf (ctlstr
, args
);
932 = string_printf (_("%s%s(%s or %s) %s"),
933 annotation_level
> 1 ? "\n\032\032pre-query\n" : "",
934 question
.c_str (), y_string
, n_string
,
935 annotation_level
> 1 ? "\n\032\032query\n" : "");
937 /* Used to add duration we waited for user to respond to
938 prompt_for_continue_wait_time. */
939 using namespace std::chrono
;
940 steady_clock::time_point prompt_started
= steady_clock::now ();
942 scoped_input_handler prepare_input
;
946 char *response
, answer
;
948 gdb_flush (gdb_stdout
);
949 response
= gdb_readline_wrapper (prompt
.c_str ());
951 if (response
== NULL
) /* C-d */
953 printf_filtered ("EOF [assumed %c]\n", def_answer
);
958 answer
= response
[0];
963 /* Check answer. For the non-default, the user must specify
964 the non-default explicitly. */
965 if (answer
== not_def_answer
)
970 /* Otherwise, if a default was specified, the user may either
971 specify the required input or have it default by entering
973 if (answer
== def_answer
974 || (defchar
!= '\0' && answer
== '\0'))
979 /* Invalid entries are not defaulted and require another selection. */
980 printf_filtered (_("Please answer %s or %s.\n"),
984 /* Add time spend in this routine to prompt_for_continue_wait_time. */
985 prompt_for_continue_wait_time
+= steady_clock::now () - prompt_started
;
987 if (annotation_level
> 1)
988 printf_filtered (("\n\032\032post-query\n"));
993 /* Ask user a y-or-n question and return 0 if answer is no, 1 if
994 answer is yes, or 0 if answer is defaulted.
995 Takes three args which are given to printf to print the question.
996 The first, a control string, should end in "? ".
997 It should not say how to answer, because we do that. */
1000 nquery (const char *ctlstr
, ...)
1005 va_start (args
, ctlstr
);
1006 ret
= defaulted_query (ctlstr
, 'n', args
);
1011 /* Ask user a y-or-n question and return 0 if answer is no, 1 if
1012 answer is yes, or 1 if answer is defaulted.
1013 Takes three args which are given to printf to print the question.
1014 The first, a control string, should end in "? ".
1015 It should not say how to answer, because we do that. */
1018 yquery (const char *ctlstr
, ...)
1023 va_start (args
, ctlstr
);
1024 ret
= defaulted_query (ctlstr
, 'y', args
);
1029 /* Ask user a y-or-n question and return 1 iff answer is yes.
1030 Takes three args which are given to printf to print the question.
1031 The first, a control string, should end in "? ".
1032 It should not say how to answer, because we do that. */
1035 query (const char *ctlstr
, ...)
1040 va_start (args
, ctlstr
);
1041 ret
= defaulted_query (ctlstr
, '\0', args
);
1046 /* A helper for parse_escape that converts a host character to a
1047 target character. C is the host character. If conversion is
1048 possible, then the target character is stored in *TARGET_C and the
1049 function returns 1. Otherwise, the function returns 0. */
1052 host_char_to_target (struct gdbarch
*gdbarch
, int c
, int *target_c
)
1057 auto_obstack host_data
;
1059 convert_between_encodings (target_charset (gdbarch
), host_charset (),
1060 (gdb_byte
*) &the_char
, 1, 1,
1061 &host_data
, translit_none
);
1063 if (obstack_object_size (&host_data
) == 1)
1066 *target_c
= *(char *) obstack_base (&host_data
);
1072 /* Parse a C escape sequence. STRING_PTR points to a variable
1073 containing a pointer to the string to parse. That pointer
1074 should point to the character after the \. That pointer
1075 is updated past the characters we use. The value of the
1076 escape sequence is returned.
1078 A negative value means the sequence \ newline was seen,
1079 which is supposed to be equivalent to nothing at all.
1081 If \ is followed by a null character, we return a negative
1082 value and leave the string pointer pointing at the null character.
1084 If \ is followed by 000, we return 0 and leave the string pointer
1085 after the zeros. A value of 0 does not mean end of string. */
1088 parse_escape (struct gdbarch
*gdbarch
, const char **string_ptr
)
1090 int target_char
= -2; /* Initialize to avoid GCC warnings. */
1091 int c
= *(*string_ptr
)++;
1110 int i
= host_hex_value (c
);
1115 if (isdigit (c
) && c
!= '8' && c
!= '9')
1119 i
+= host_hex_value (c
);
1155 if (!host_char_to_target (gdbarch
, c
, &target_char
))
1156 error (_("The escape sequence `\\%c' is equivalent to plain `%c',"
1157 " which has no equivalent\nin the `%s' character set."),
1158 c
, c
, target_charset (gdbarch
));
1162 /* Print the character C on STREAM as part of the contents of a literal
1163 string whose delimiter is QUOTER. Note that this routine should only
1164 be called for printing things which are independent of the language
1165 of the program being debugged.
1167 printchar will normally escape backslashes and instances of QUOTER. If
1168 QUOTER is 0, printchar won't escape backslashes or any quoting character.
1169 As a side effect, if you pass the backslash character as the QUOTER,
1170 printchar will escape backslashes as usual, but not any other quoting
1174 printchar (int c
, do_fputc_ftype do_fputc
, ui_file
*stream
, int quoter
)
1176 c
&= 0xFF; /* Avoid sign bit follies */
1178 if (c
< 0x20 || /* Low control chars */
1179 (c
>= 0x7F && c
< 0xA0) || /* DEL, High controls */
1180 (sevenbit_strings
&& c
>= 0x80))
1181 { /* high order bit set */
1182 do_fputc ('\\', stream
);
1187 do_fputc ('n', stream
);
1190 do_fputc ('b', stream
);
1193 do_fputc ('t', stream
);
1196 do_fputc ('f', stream
);
1199 do_fputc ('r', stream
);
1202 do_fputc ('e', stream
);
1205 do_fputc ('a', stream
);
1209 do_fputc ('0' + ((c
>> 6) & 0x7), stream
);
1210 do_fputc ('0' + ((c
>> 3) & 0x7), stream
);
1211 do_fputc ('0' + ((c
>> 0) & 0x7), stream
);
1218 if (quoter
!= 0 && (c
== '\\' || c
== quoter
))
1219 do_fputc ('\\', stream
);
1220 do_fputc (c
, stream
);
1224 /* Print the character C on STREAM as part of the contents of a
1225 literal string whose delimiter is QUOTER. Note that these routines
1226 should only be call for printing things which are independent of
1227 the language of the program being debugged. */
1230 fputstr_filtered (const char *str
, int quoter
, struct ui_file
*stream
)
1233 printchar (*str
++, fputc_filtered
, stream
, quoter
);
1237 fputstr_unfiltered (const char *str
, int quoter
, struct ui_file
*stream
)
1240 printchar (*str
++, fputc_unfiltered
, stream
, quoter
);
1244 fputstrn_filtered (const char *str
, int n
, int quoter
,
1245 struct ui_file
*stream
)
1247 for (int i
= 0; i
< n
; i
++)
1248 printchar (str
[i
], fputc_filtered
, stream
, quoter
);
1252 fputstrn_unfiltered (const char *str
, int n
, int quoter
,
1253 do_fputc_ftype do_fputc
, struct ui_file
*stream
)
1255 for (int i
= 0; i
< n
; i
++)
1256 printchar (str
[i
], do_fputc
, stream
, quoter
);
1260 /* Number of lines per page or UINT_MAX if paging is disabled. */
1261 static unsigned int lines_per_page
;
1263 show_lines_per_page (struct ui_file
*file
, int from_tty
,
1264 struct cmd_list_element
*c
, const char *value
)
1266 fprintf_filtered (file
,
1267 _("Number of lines gdb thinks are in a page is %s.\n"),
1271 /* Number of chars per line or UINT_MAX if line folding is disabled. */
1272 static unsigned int chars_per_line
;
1274 show_chars_per_line (struct ui_file
*file
, int from_tty
,
1275 struct cmd_list_element
*c
, const char *value
)
1277 fprintf_filtered (file
,
1278 _("Number of characters gdb thinks "
1279 "are in a line is %s.\n"),
1283 /* Current count of lines printed on this page, chars on this line. */
1284 static unsigned int lines_printed
, chars_printed
;
1286 /* True if pagination is disabled for just one command. */
1288 static bool pagination_disabled_for_command
;
1290 /* Buffer and start column of buffered text, for doing smarter word-
1291 wrapping. When someone calls wrap_here(), we start buffering output
1292 that comes through fputs_filtered(). If we see a newline, we just
1293 spit it out and forget about the wrap_here(). If we see another
1294 wrap_here(), we spit it out and remember the newer one. If we see
1295 the end of the line, we spit out a newline, the indent, and then
1296 the buffered output. */
1298 /* Malloc'd buffer with chars_per_line+2 bytes. Contains characters which
1299 are waiting to be output (they have already been counted in chars_printed).
1300 When wrap_buffer[0] is null, the buffer is empty. */
1301 static char *wrap_buffer
;
1303 /* Pointer in wrap_buffer to the next character to fill. */
1304 static char *wrap_pointer
;
1306 /* String to indent by if the wrap occurs. Must not be NULL if wrap_column
1308 static const char *wrap_indent
;
1310 /* Column number on the screen where wrap_buffer begins, or 0 if wrapping
1311 is not in effect. */
1312 static int wrap_column
;
1315 /* Initialize the number of lines per page and chars per line. */
1318 init_page_info (void)
1322 lines_per_page
= UINT_MAX
;
1323 chars_per_line
= UINT_MAX
;
1327 if (!tui_get_command_dimension (&chars_per_line
, &lines_per_page
))
1332 #if defined(__GO32__)
1333 rows
= ScreenRows ();
1334 cols
= ScreenCols ();
1335 lines_per_page
= rows
;
1336 chars_per_line
= cols
;
1338 /* Make sure Readline has initialized its terminal settings. */
1339 rl_reset_terminal (NULL
);
1341 /* Get the screen size from Readline. */
1342 rl_get_screen_size (&rows
, &cols
);
1343 lines_per_page
= rows
;
1344 chars_per_line
= cols
;
1346 /* Readline should have fetched the termcap entry for us.
1347 Only try to use tgetnum function if rl_get_screen_size
1348 did not return a useful value. */
1349 if (((rows
<= 0) && (tgetnum ((char *) "li") < 0))
1350 /* Also disable paging if inside Emacs. $EMACS was used
1351 before Emacs v25.1, $INSIDE_EMACS is used since then. */
1352 || getenv ("EMACS") || getenv ("INSIDE_EMACS"))
1354 /* The number of lines per page is not mentioned in the terminal
1355 description or EMACS evironment variable is set. This probably
1356 means that paging is not useful, so disable paging. */
1357 lines_per_page
= UINT_MAX
;
1360 /* If the output is not a terminal, don't paginate it. */
1361 if (!ui_file_isatty (gdb_stdout
))
1362 lines_per_page
= UINT_MAX
;
1366 /* We handle SIGWINCH ourselves. */
1367 rl_catch_sigwinch
= 0;
1373 /* Return nonzero if filtered printing is initialized. */
1375 filtered_printing_initialized (void)
1377 return wrap_buffer
!= NULL
;
1380 set_batch_flag_and_restore_page_info::set_batch_flag_and_restore_page_info ()
1381 : m_save_lines_per_page (lines_per_page
),
1382 m_save_chars_per_line (chars_per_line
),
1383 m_save_batch_flag (batch_flag
)
1389 set_batch_flag_and_restore_page_info::~set_batch_flag_and_restore_page_info ()
1391 batch_flag
= m_save_batch_flag
;
1392 chars_per_line
= m_save_chars_per_line
;
1393 lines_per_page
= m_save_lines_per_page
;
1399 /* Set the screen size based on LINES_PER_PAGE and CHARS_PER_LINE. */
1402 set_screen_size (void)
1404 int rows
= lines_per_page
;
1405 int cols
= chars_per_line
;
1413 /* Update Readline's idea of the terminal size. */
1414 rl_set_screen_size (rows
, cols
);
1417 /* Reinitialize WRAP_BUFFER according to the current value of
1423 if (chars_per_line
== 0)
1428 wrap_buffer
= (char *) xmalloc (chars_per_line
+ 2);
1429 wrap_buffer
[0] = '\0';
1432 wrap_buffer
= (char *) xrealloc (wrap_buffer
, chars_per_line
+ 2);
1433 wrap_pointer
= wrap_buffer
; /* Start it at the beginning. */
1437 set_width_command (const char *args
, int from_tty
, struct cmd_list_element
*c
)
1444 set_height_command (const char *args
, int from_tty
, struct cmd_list_element
*c
)
1452 set_screen_width_and_height (int width
, int height
)
1454 lines_per_page
= height
;
1455 chars_per_line
= width
;
1461 /* Wait, so the user can read what's on the screen. Prompt the user
1462 to continue by pressing RETURN. 'q' is also provided because
1463 telling users what to do in the prompt is more user-friendly than
1464 expecting them to think of Ctrl-C/SIGINT. */
1467 prompt_for_continue (void)
1469 char cont_prompt
[120];
1470 /* Used to add duration we waited for user to respond to
1471 prompt_for_continue_wait_time. */
1472 using namespace std::chrono
;
1473 steady_clock::time_point prompt_started
= steady_clock::now ();
1474 bool disable_pagination
= pagination_disabled_for_command
;
1476 if (annotation_level
> 1)
1477 printf_unfiltered (("\n\032\032pre-prompt-for-continue\n"));
1479 strcpy (cont_prompt
,
1480 "--Type <RET> for more, q to quit, "
1481 "c to continue without paging--");
1482 if (annotation_level
> 1)
1483 strcat (cont_prompt
, "\n\032\032prompt-for-continue\n");
1485 /* We must do this *before* we call gdb_readline_wrapper, else it
1486 will eventually call us -- thinking that we're trying to print
1487 beyond the end of the screen. */
1488 reinitialize_more_filter ();
1490 scoped_input_handler prepare_input
;
1492 /* Call gdb_readline_wrapper, not readline, in order to keep an
1493 event loop running. */
1494 gdb::unique_xmalloc_ptr
<char> ignore (gdb_readline_wrapper (cont_prompt
));
1496 /* Add time spend in this routine to prompt_for_continue_wait_time. */
1497 prompt_for_continue_wait_time
+= steady_clock::now () - prompt_started
;
1499 if (annotation_level
> 1)
1500 printf_unfiltered (("\n\032\032post-prompt-for-continue\n"));
1504 char *p
= ignore
.get ();
1506 while (*p
== ' ' || *p
== '\t')
1509 /* Do not call quit here; there is no possibility of SIGINT. */
1510 throw_quit ("Quit");
1512 disable_pagination
= true;
1515 /* Now we have to do this again, so that GDB will know that it doesn't
1516 need to save the ---Type <return>--- line at the top of the screen. */
1517 reinitialize_more_filter ();
1518 pagination_disabled_for_command
= disable_pagination
;
1520 dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */
1523 /* Initialize timer to keep track of how long we waited for the user. */
1526 reset_prompt_for_continue_wait_time (void)
1528 using namespace std::chrono
;
1530 prompt_for_continue_wait_time
= steady_clock::duration::zero ();
1533 /* Fetch the cumulative time spent in prompt_for_continue. */
1535 std::chrono::steady_clock::duration
1536 get_prompt_for_continue_wait_time ()
1538 return prompt_for_continue_wait_time
;
1541 /* Reinitialize filter; ie. tell it to reset to original values. */
1544 reinitialize_more_filter (void)
1548 pagination_disabled_for_command
= false;
1551 /* Indicate that if the next sequence of characters overflows the line,
1552 a newline should be inserted here rather than when it hits the end.
1553 If INDENT is non-null, it is a string to be printed to indent the
1554 wrapped part on the next line. INDENT must remain accessible until
1555 the next call to wrap_here() or until a newline is printed through
1558 If the line is already overfull, we immediately print a newline and
1559 the indentation, and disable further wrapping.
1561 If we don't know the width of lines, but we know the page height,
1562 we must not wrap words, but should still keep track of newlines
1563 that were explicitly printed.
1565 INDENT should not contain tabs, as that will mess up the char count
1566 on the next line. FIXME.
1568 This routine is guaranteed to force out any output which has been
1569 squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be
1570 used to force out output from the wrap_buffer. */
1573 wrap_here (const char *indent
)
1575 /* This should have been allocated, but be paranoid anyway. */
1577 internal_error (__FILE__
, __LINE__
,
1578 _("failed internal consistency check"));
1582 *wrap_pointer
= '\0';
1583 fputs_unfiltered (wrap_buffer
, gdb_stdout
);
1585 wrap_pointer
= wrap_buffer
;
1586 wrap_buffer
[0] = '\0';
1587 if (chars_per_line
== UINT_MAX
) /* No line overflow checking. */
1591 else if (chars_printed
>= chars_per_line
)
1593 puts_filtered ("\n");
1595 puts_filtered (indent
);
1600 wrap_column
= chars_printed
;
1604 wrap_indent
= indent
;
1608 /* Print input string to gdb_stdout, filtered, with wrap,
1609 arranging strings in columns of n chars. String can be
1610 right or left justified in the column. Never prints
1611 trailing spaces. String should never be longer than
1612 width. FIXME: this could be useful for the EXAMINE
1613 command, which currently doesn't tabulate very well. */
1616 puts_filtered_tabular (char *string
, int width
, int right
)
1622 gdb_assert (chars_per_line
> 0);
1623 if (chars_per_line
== UINT_MAX
)
1625 fputs_filtered (string
, gdb_stdout
);
1626 fputs_filtered ("\n", gdb_stdout
);
1630 if (((chars_printed
- 1) / width
+ 2) * width
>= chars_per_line
)
1631 fputs_filtered ("\n", gdb_stdout
);
1633 if (width
>= chars_per_line
)
1634 width
= chars_per_line
- 1;
1636 stringlen
= strlen (string
);
1638 if (chars_printed
> 0)
1639 spaces
= width
- (chars_printed
- 1) % width
- 1;
1641 spaces
+= width
- stringlen
;
1643 spacebuf
= (char *) alloca (spaces
+ 1);
1644 spacebuf
[spaces
] = '\0';
1646 spacebuf
[spaces
] = ' ';
1648 fputs_filtered (spacebuf
, gdb_stdout
);
1649 fputs_filtered (string
, gdb_stdout
);
1653 /* Ensure that whatever gets printed next, using the filtered output
1654 commands, starts at the beginning of the line. I.e. if there is
1655 any pending output for the current line, flush it and start a new
1656 line. Otherwise do nothing. */
1661 if (chars_printed
> 0)
1663 puts_filtered ("\n");
1668 /* Like fputs but if FILTER is true, pause after every screenful.
1670 Regardless of FILTER can wrap at points other than the final
1671 character of a line.
1673 Unlike fputs, fputs_maybe_filtered does not return a value.
1674 It is OK for LINEBUFFER to be NULL, in which case just don't print
1677 Note that a longjmp to top level may occur in this routine (only if
1678 FILTER is true) (since prompt_for_continue may do so) so this
1679 routine should not be called when cleanups are not in place. */
1682 fputs_maybe_filtered (const char *linebuffer
, struct ui_file
*stream
,
1685 const char *lineptr
;
1687 if (linebuffer
== 0)
1690 /* Don't do any filtering if it is disabled. */
1691 if (stream
!= gdb_stdout
1692 || !pagination_enabled
1693 || pagination_disabled_for_command
1695 || (lines_per_page
== UINT_MAX
&& chars_per_line
== UINT_MAX
)
1696 || top_level_interpreter () == NULL
1697 || top_level_interpreter ()->interp_ui_out ()->is_mi_like_p ())
1699 fputs_unfiltered (linebuffer
, stream
);
1703 /* Go through and output each character. Show line extension
1704 when this is necessary; prompt user for new page when this is
1707 lineptr
= linebuffer
;
1710 /* Possible new page. Note that PAGINATION_DISABLED_FOR_COMMAND
1711 might be set during this loop, so we must continue to check
1713 if (filter
&& (lines_printed
>= lines_per_page
- 1)
1714 && !pagination_disabled_for_command
)
1715 prompt_for_continue ();
1717 while (*lineptr
&& *lineptr
!= '\n')
1719 /* Print a single line. */
1720 if (*lineptr
== '\t')
1723 *wrap_pointer
++ = '\t';
1725 fputc_unfiltered ('\t', stream
);
1726 /* Shifting right by 3 produces the number of tab stops
1727 we have already passed, and then adding one and
1728 shifting left 3 advances to the next tab stop. */
1729 chars_printed
= ((chars_printed
>> 3) + 1) << 3;
1735 *wrap_pointer
++ = *lineptr
;
1737 fputc_unfiltered (*lineptr
, stream
);
1742 if (chars_printed
>= chars_per_line
)
1744 unsigned int save_chars
= chars_printed
;
1748 /* If we aren't actually wrapping, don't output newline --
1749 if chars_per_line is right, we probably just overflowed
1750 anyway; if it's wrong, let us keep going. */
1752 fputc_unfiltered ('\n', stream
);
1754 /* Possible new page. Note that
1755 PAGINATION_DISABLED_FOR_COMMAND might be set during
1756 this loop, so we must continue to check it here. */
1757 if (lines_printed
>= lines_per_page
- 1
1758 && !pagination_disabled_for_command
)
1759 prompt_for_continue ();
1761 /* Now output indentation and wrapped string. */
1764 fputs_unfiltered (wrap_indent
, stream
);
1765 *wrap_pointer
= '\0'; /* Null-terminate saved stuff, */
1766 fputs_unfiltered (wrap_buffer
, stream
); /* and eject it. */
1767 /* FIXME, this strlen is what prevents wrap_indent from
1768 containing tabs. However, if we recurse to print it
1769 and count its chars, we risk trouble if wrap_indent is
1770 longer than (the user settable) chars_per_line.
1771 Note also that this can set chars_printed > chars_per_line
1772 if we are printing a long string. */
1773 chars_printed
= strlen (wrap_indent
)
1774 + (save_chars
- wrap_column
);
1775 wrap_pointer
= wrap_buffer
; /* Reset buffer */
1776 wrap_buffer
[0] = '\0';
1777 wrap_column
= 0; /* And disable fancy wrap */
1782 if (*lineptr
== '\n')
1785 wrap_here ((char *) 0); /* Spit out chars, cancel
1788 fputc_unfiltered ('\n', stream
);
1795 fputs_filtered (const char *linebuffer
, struct ui_file
*stream
)
1797 fputs_maybe_filtered (linebuffer
, stream
, 1);
1801 putchar_unfiltered (int c
)
1805 ui_file_write (gdb_stdout
, &buf
, 1);
1809 /* Write character C to gdb_stdout using GDB's paging mechanism and return C.
1810 May return nonlocally. */
1813 putchar_filtered (int c
)
1815 return fputc_filtered (c
, gdb_stdout
);
1819 fputc_unfiltered (int c
, struct ui_file
*stream
)
1823 ui_file_write (stream
, &buf
, 1);
1828 fputc_filtered (int c
, struct ui_file
*stream
)
1834 fputs_filtered (buf
, stream
);
1838 /* puts_debug is like fputs_unfiltered, except it prints special
1839 characters in printable fashion. */
1842 puts_debug (char *prefix
, char *string
, char *suffix
)
1846 /* Print prefix and suffix after each line. */
1847 static int new_line
= 1;
1848 static int return_p
= 0;
1849 static const char *prev_prefix
= "";
1850 static const char *prev_suffix
= "";
1852 if (*string
== '\n')
1855 /* If the prefix is changing, print the previous suffix, a new line,
1856 and the new prefix. */
1857 if ((return_p
|| (strcmp (prev_prefix
, prefix
) != 0)) && !new_line
)
1859 fputs_unfiltered (prev_suffix
, gdb_stdlog
);
1860 fputs_unfiltered ("\n", gdb_stdlog
);
1861 fputs_unfiltered (prefix
, gdb_stdlog
);
1864 /* Print prefix if we printed a newline during the previous call. */
1868 fputs_unfiltered (prefix
, gdb_stdlog
);
1871 prev_prefix
= prefix
;
1872 prev_suffix
= suffix
;
1874 /* Output characters in a printable format. */
1875 while ((ch
= *string
++) != '\0')
1881 fputc_unfiltered (ch
, gdb_stdlog
);
1884 fprintf_unfiltered (gdb_stdlog
, "\\x%02x", ch
& 0xff);
1888 fputs_unfiltered ("\\\\", gdb_stdlog
);
1891 fputs_unfiltered ("\\b", gdb_stdlog
);
1894 fputs_unfiltered ("\\f", gdb_stdlog
);
1898 fputs_unfiltered ("\\n", gdb_stdlog
);
1901 fputs_unfiltered ("\\r", gdb_stdlog
);
1904 fputs_unfiltered ("\\t", gdb_stdlog
);
1907 fputs_unfiltered ("\\v", gdb_stdlog
);
1911 return_p
= ch
== '\r';
1914 /* Print suffix if we printed a newline. */
1917 fputs_unfiltered (suffix
, gdb_stdlog
);
1918 fputs_unfiltered ("\n", gdb_stdlog
);
1923 /* Print a variable number of ARGS using format FORMAT. If this
1924 information is going to put the amount written (since the last call
1925 to REINITIALIZE_MORE_FILTER or the last page break) over the page size,
1926 call prompt_for_continue to get the users permision to continue.
1928 Unlike fprintf, this function does not return a value.
1930 We implement three variants, vfprintf (takes a vararg list and stream),
1931 fprintf (takes a stream to write on), and printf (the usual).
1933 Note also that a longjmp to top level may occur in this routine
1934 (since prompt_for_continue may do so) so this routine should not be
1935 called when cleanups are not in place. */
1938 vfprintf_maybe_filtered (struct ui_file
*stream
, const char *format
,
1939 va_list args
, int filter
)
1941 std::string linebuffer
= string_vprintf (format
, args
);
1942 fputs_maybe_filtered (linebuffer
.c_str (), stream
, filter
);
1947 vfprintf_filtered (struct ui_file
*stream
, const char *format
, va_list args
)
1949 vfprintf_maybe_filtered (stream
, format
, args
, 1);
1953 vfprintf_unfiltered (struct ui_file
*stream
, const char *format
, va_list args
)
1955 std::string linebuffer
= string_vprintf (format
, args
);
1956 if (debug_timestamp
&& stream
== gdb_stdlog
)
1958 using namespace std::chrono
;
1961 steady_clock::time_point now
= steady_clock::now ();
1962 seconds s
= duration_cast
<seconds
> (now
.time_since_epoch ());
1963 microseconds us
= duration_cast
<microseconds
> (now
.time_since_epoch () - s
);
1965 len
= linebuffer
.size ();
1966 need_nl
= (len
> 0 && linebuffer
[len
- 1] != '\n');
1968 std::string timestamp
= string_printf ("%ld.%06ld %s%s",
1971 linebuffer
.c_str (),
1972 need_nl
? "\n": "");
1973 fputs_unfiltered (timestamp
.c_str (), stream
);
1976 fputs_unfiltered (linebuffer
.c_str (), stream
);
1980 vprintf_filtered (const char *format
, va_list args
)
1982 vfprintf_maybe_filtered (gdb_stdout
, format
, args
, 1);
1986 vprintf_unfiltered (const char *format
, va_list args
)
1988 vfprintf_unfiltered (gdb_stdout
, format
, args
);
1992 fprintf_filtered (struct ui_file
*stream
, const char *format
, ...)
1996 va_start (args
, format
);
1997 vfprintf_filtered (stream
, format
, args
);
2002 fprintf_unfiltered (struct ui_file
*stream
, const char *format
, ...)
2006 va_start (args
, format
);
2007 vfprintf_unfiltered (stream
, format
, args
);
2011 /* Like fprintf_filtered, but prints its result indented.
2012 Called as fprintfi_filtered (spaces, stream, format, ...); */
2015 fprintfi_filtered (int spaces
, struct ui_file
*stream
, const char *format
,
2020 va_start (args
, format
);
2021 print_spaces_filtered (spaces
, stream
);
2023 vfprintf_filtered (stream
, format
, args
);
2029 printf_filtered (const char *format
, ...)
2033 va_start (args
, format
);
2034 vfprintf_filtered (gdb_stdout
, format
, args
);
2040 printf_unfiltered (const char *format
, ...)
2044 va_start (args
, format
);
2045 vfprintf_unfiltered (gdb_stdout
, format
, args
);
2049 /* Like printf_filtered, but prints it's result indented.
2050 Called as printfi_filtered (spaces, format, ...); */
2053 printfi_filtered (int spaces
, const char *format
, ...)
2057 va_start (args
, format
);
2058 print_spaces_filtered (spaces
, gdb_stdout
);
2059 vfprintf_filtered (gdb_stdout
, format
, args
);
2063 /* Easy -- but watch out!
2065 This routine is *not* a replacement for puts()! puts() appends a newline.
2066 This one doesn't, and had better not! */
2069 puts_filtered (const char *string
)
2071 fputs_filtered (string
, gdb_stdout
);
2075 puts_unfiltered (const char *string
)
2077 fputs_unfiltered (string
, gdb_stdout
);
2080 /* Return a pointer to N spaces and a null. The pointer is good
2081 until the next call to here. */
2086 static char *spaces
= 0;
2087 static int max_spaces
= -1;
2093 spaces
= (char *) xmalloc (n
+ 1);
2094 for (t
= spaces
+ n
; t
!= spaces
;)
2100 return spaces
+ max_spaces
- n
;
2103 /* Print N spaces. */
2105 print_spaces_filtered (int n
, struct ui_file
*stream
)
2107 fputs_filtered (n_spaces (n
), stream
);
2110 /* C++/ObjC demangler stuff. */
2112 /* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language
2113 LANG, using demangling args ARG_MODE, and print it filtered to STREAM.
2114 If the name is not mangled, or the language for the name is unknown, or
2115 demangling is off, the name is printed in its "raw" form. */
2118 fprintf_symbol_filtered (struct ui_file
*stream
, const char *name
,
2119 enum language lang
, int arg_mode
)
2125 /* If user wants to see raw output, no problem. */
2128 fputs_filtered (name
, stream
);
2132 demangled
= language_demangle (language_def (lang
), name
, arg_mode
);
2133 fputs_filtered (demangled
? demangled
: name
, stream
);
2134 if (demangled
!= NULL
)
2142 /* True if CH is a character that can be part of a symbol name. I.e.,
2143 either a number, a letter, or a '_'. */
2146 valid_identifier_name_char (int ch
)
2148 return (isalnum (ch
) || ch
== '_');
2151 /* Skip to end of token, or to END, whatever comes first. Input is
2152 assumed to be a C++ operator name. */
2155 cp_skip_operator_token (const char *token
, const char *end
)
2157 const char *p
= token
;
2158 while (p
!= end
&& !isspace (*p
) && *p
!= '(')
2160 if (valid_identifier_name_char (*p
))
2162 while (p
!= end
&& valid_identifier_name_char (*p
))
2168 /* Note, ordered such that among ops that share a prefix,
2169 longer comes first. This is so that the loop below can
2170 bail on first match. */
2171 static const char *ops
[] =
2177 "-=", "--", "->", "-",
2186 "<<=", "<=", "<<", "<",
2187 ">>=", ">=", ">>", ">",
2191 for (const char *op
: ops
)
2193 size_t oplen
= strlen (op
);
2194 size_t lencmp
= std::min
<size_t> (oplen
, end
- p
);
2196 if (strncmp (p
, op
, lencmp
) == 0)
2199 /* Some unidentified character. Return it. */
2207 /* Advance STRING1/STRING2 past whitespace. */
2210 skip_ws (const char *&string1
, const char *&string2
, const char *end_str2
)
2212 while (isspace (*string1
))
2214 while (string2
< end_str2
&& isspace (*string2
))
2218 /* True if STRING points at the start of a C++ operator name. START
2219 is the start of the string that STRING points to, hence when
2220 reading backwards, we must not read any character before START. */
2223 cp_is_operator (const char *string
, const char *start
)
2225 return ((string
== start
2226 || !valid_identifier_name_char (string
[-1]))
2227 && strncmp (string
, CP_OPERATOR_STR
, CP_OPERATOR_LEN
) == 0
2228 && !valid_identifier_name_char (string
[CP_OPERATOR_LEN
]));
2231 /* If *NAME points at an ABI tag, skip it and return true. Otherwise
2232 leave *NAME unmodified and return false. (see GCC's abi_tag
2233 attribute), such names are demangled as e.g.,
2234 "function[abi:cxx11]()". */
2237 skip_abi_tag (const char **name
)
2239 const char *p
= *name
;
2241 if (startswith (p
, "[abi:"))
2245 while (valid_identifier_name_char (*p
))
2261 strncmp_iw_with_mode (const char *string1
, const char *string2
,
2262 size_t string2_len
, strncmp_iw_mode mode
,
2263 enum language language
,
2264 completion_match_for_lcd
*match_for_lcd
)
2266 const char *string1_start
= string1
;
2267 const char *end_str2
= string2
+ string2_len
;
2268 bool skip_spaces
= true;
2269 bool have_colon_op
= (language
== language_cplus
2270 || language
== language_rust
2271 || language
== language_fortran
);
2276 || ((isspace (*string1
) && !valid_identifier_name_char (*string2
))
2277 || (isspace (*string2
) && !valid_identifier_name_char (*string1
))))
2279 skip_ws (string1
, string2
, end_str2
);
2280 skip_spaces
= false;
2283 /* Skip [abi:cxx11] tags in the symbol name if the lookup name
2284 doesn't include them. E.g.:
2286 string1: function[abi:cxx1](int)
2289 string1: function[abi:cxx1](int)
2290 string2: function(int)
2292 string1: Struct[abi:cxx1]::function()
2293 string2: Struct::function()
2295 string1: function(Struct[abi:cxx1], int)
2296 string2: function(Struct, int)
2298 if (string2
== end_str2
2299 || (*string2
!= '[' && !valid_identifier_name_char (*string2
)))
2301 const char *abi_start
= string1
;
2303 /* There can be more than one tag. */
2304 while (*string1
== '[' && skip_abi_tag (&string1
))
2307 if (match_for_lcd
!= NULL
&& abi_start
!= string1
)
2308 match_for_lcd
->mark_ignored_range (abi_start
, string1
);
2310 while (isspace (*string1
))
2314 if (*string1
== '\0' || string2
== end_str2
)
2317 /* Handle the :: operator. */
2318 if (have_colon_op
&& string1
[0] == ':' && string1
[1] == ':')
2320 if (*string2
!= ':')
2326 if (string2
== end_str2
)
2329 if (*string2
!= ':')
2335 while (isspace (*string1
))
2337 while (string2
< end_str2
&& isspace (*string2
))
2342 /* Handle C++ user-defined operators. */
2343 else if (language
== language_cplus
2346 if (cp_is_operator (string1
, string1_start
))
2348 /* An operator name in STRING1. Check STRING2. */
2350 = std::min
<size_t> (CP_OPERATOR_LEN
, end_str2
- string2
);
2351 if (strncmp (string1
, string2
, cmplen
) != 0)
2357 if (string2
!= end_str2
)
2359 /* Check for "operatorX" in STRING2. */
2360 if (valid_identifier_name_char (*string2
))
2363 skip_ws (string1
, string2
, end_str2
);
2366 /* Handle operator(). */
2367 if (*string1
== '(')
2369 if (string2
== end_str2
)
2371 if (mode
== strncmp_iw_mode::NORMAL
)
2375 /* Don't break for the regular return at the
2376 bottom, because "operator" should not
2377 match "operator()", since this open
2378 parentheses is not the parameter list
2380 return *string1
!= '\0';
2384 if (*string1
!= *string2
)
2393 skip_ws (string1
, string2
, end_str2
);
2395 /* Skip to end of token, or to END, whatever comes
2397 const char *end_str1
= string1
+ strlen (string1
);
2398 const char *p1
= cp_skip_operator_token (string1
, end_str1
);
2399 const char *p2
= cp_skip_operator_token (string2
, end_str2
);
2401 cmplen
= std::min (p1
- string1
, p2
- string2
);
2404 if (strncmp (string1
, string2
, cmplen
) != 0)
2409 if (p1
- string1
!= p2
- string2
)
2411 if (strncmp (string1
, string2
, cmplen
) != 0)
2418 if (*string1
== '\0' || string2
== end_str2
)
2420 if (*string1
== '(' || *string2
== '(')
2428 if (case_sensitivity
== case_sensitive_on
&& *string1
!= *string2
)
2430 if (case_sensitivity
== case_sensitive_off
2431 && (tolower ((unsigned char) *string1
)
2432 != tolower ((unsigned char) *string2
)))
2435 /* If we see any non-whitespace, non-identifier-name character
2436 (any of "()<>*&" etc.), then skip spaces the next time
2438 if (!isspace (*string1
) && !valid_identifier_name_char (*string1
))
2445 if (string2
== end_str2
)
2447 if (mode
== strncmp_iw_mode::NORMAL
)
2449 /* Strip abi tag markers from the matched symbol name.
2450 Usually the ABI marker will be found on function name
2451 (automatically added because the function returns an
2452 object marked with an ABI tag). However, it's also
2453 possible to see a marker in one of the function
2454 parameters, for example.
2456 string2 (lookup name):
2459 function(some_struct[abi:cxx11], int)
2461 and for completion LCD computation we want to say that
2463 function(some_struct, int)
2465 if (match_for_lcd
!= NULL
)
2467 while ((string1
= strstr (string1
, "[abi:")) != NULL
)
2469 const char *abi_start
= string1
;
2471 /* There can be more than one tag. */
2472 while (skip_abi_tag (&string1
) && *string1
== '[')
2475 if (abi_start
!= string1
)
2476 match_for_lcd
->mark_ignored_range (abi_start
, string1
);
2483 return (*string1
!= '\0' && *string1
!= '(');
2492 strncmp_iw (const char *string1
, const char *string2
, size_t string2_len
)
2494 return strncmp_iw_with_mode (string1
, string2
, string2_len
,
2495 strncmp_iw_mode::NORMAL
, language_minimal
);
2501 strcmp_iw (const char *string1
, const char *string2
)
2503 return strncmp_iw_with_mode (string1
, string2
, strlen (string2
),
2504 strncmp_iw_mode::MATCH_PARAMS
, language_minimal
);
2507 /* This is like strcmp except that it ignores whitespace and treats
2508 '(' as the first non-NULL character in terms of ordering. Like
2509 strcmp (and unlike strcmp_iw), it returns negative if STRING1 <
2510 STRING2, 0 if STRING2 = STRING2, and positive if STRING1 > STRING2
2511 according to that ordering.
2513 If a list is sorted according to this function and if you want to
2514 find names in the list that match some fixed NAME according to
2515 strcmp_iw(LIST_ELT, NAME), then the place to start looking is right
2516 where this function would put NAME.
2518 This function must be neutral to the CASE_SENSITIVITY setting as the user
2519 may choose it during later lookup. Therefore this function always sorts
2520 primarily case-insensitively and secondarily case-sensitively.
2522 Here are some examples of why using strcmp to sort is a bad idea:
2526 Say your partial symtab contains: "foo<char *>", "goo". Then, if
2527 we try to do a search for "foo<char*>", strcmp will locate this
2528 after "foo<char *>" and before "goo". Then lookup_partial_symbol
2529 will start looking at strings beginning with "goo", and will never
2530 see the correct match of "foo<char *>".
2532 Parenthesis example:
2534 In practice, this is less like to be an issue, but I'll give it a
2535 shot. Let's assume that '$' is a legitimate character to occur in
2536 symbols. (Which may well even be the case on some systems.) Then
2537 say that the partial symbol table contains "foo$" and "foo(int)".
2538 strcmp will put them in this order, since '$' < '('. Now, if the
2539 user searches for "foo", then strcmp will sort "foo" before "foo$".
2540 Then lookup_partial_symbol will notice that strcmp_iw("foo$",
2541 "foo") is false, so it won't proceed to the actual match of
2542 "foo(int)" with "foo". */
2545 strcmp_iw_ordered (const char *string1
, const char *string2
)
2547 const char *saved_string1
= string1
, *saved_string2
= string2
;
2548 enum case_sensitivity case_pass
= case_sensitive_off
;
2552 /* C1 and C2 are valid only if *string1 != '\0' && *string2 != '\0'.
2553 Provide stub characters if we are already at the end of one of the
2555 char c1
= 'X', c2
= 'X';
2557 while (*string1
!= '\0' && *string2
!= '\0')
2559 while (isspace (*string1
))
2561 while (isspace (*string2
))
2566 case case_sensitive_off
:
2567 c1
= tolower ((unsigned char) *string1
);
2568 c2
= tolower ((unsigned char) *string2
);
2570 case case_sensitive_on
:
2578 if (*string1
!= '\0')
2587 /* Characters are non-equal unless they're both '\0'; we want to
2588 make sure we get the comparison right according to our
2589 comparison in the cases where one of them is '\0' or '('. */
2591 if (*string2
== '\0')
2596 if (*string2
== '\0')
2601 if (*string2
== '\0' || *string2
== '(')
2610 if (case_pass
== case_sensitive_on
)
2613 /* Otherwise the strings were equal in case insensitive way, make
2614 a more fine grained comparison in a case sensitive way. */
2616 case_pass
= case_sensitive_on
;
2617 string1
= saved_string1
;
2618 string2
= saved_string2
;
2625 streq (const char *lhs
, const char *rhs
)
2627 return !strcmp (lhs
, rhs
);
2633 streq_hash (const void *lhs
, const void *rhs
)
2635 return streq ((const char *) lhs
, (const char *) rhs
);
2642 ** Answer whether string_to_compare is a full or partial match to
2643 ** template_string. The partial match must be in sequence starting
2647 subset_compare (const char *string_to_compare
, const char *template_string
)
2651 if (template_string
!= (char *) NULL
&& string_to_compare
!= (char *) NULL
2652 && strlen (string_to_compare
) <= strlen (template_string
))
2654 (startswith (template_string
, string_to_compare
));
2661 show_debug_timestamp (struct ui_file
*file
, int from_tty
,
2662 struct cmd_list_element
*c
, const char *value
)
2664 fprintf_filtered (file
, _("Timestamping debugging messages is %s.\n"),
2670 initialize_utils (void)
2672 add_setshow_uinteger_cmd ("width", class_support
, &chars_per_line
, _("\
2673 Set number of characters where GDB should wrap lines of its output."), _("\
2674 Show number of characters where GDB should wrap lines of its output."), _("\
2675 This affects where GDB wraps its output to fit the screen width.\n\
2676 Setting this to \"unlimited\" or zero prevents GDB from wrapping its output."),
2678 show_chars_per_line
,
2679 &setlist
, &showlist
);
2681 add_setshow_uinteger_cmd ("height", class_support
, &lines_per_page
, _("\
2682 Set number of lines in a page for GDB output pagination."), _("\
2683 Show number of lines in a page for GDB output pagination."), _("\
2684 This affects the number of lines after which GDB will pause\n\
2685 its output and ask you whether to continue.\n\
2686 Setting this to \"unlimited\" or zero causes GDB never pause during output."),
2688 show_lines_per_page
,
2689 &setlist
, &showlist
);
2691 add_setshow_boolean_cmd ("pagination", class_support
,
2692 &pagination_enabled
, _("\
2693 Set state of GDB output pagination."), _("\
2694 Show state of GDB output pagination."), _("\
2695 When pagination is ON, GDB pauses at end of each screenful of\n\
2696 its output and asks you whether to continue.\n\
2697 Turning pagination off is an alternative to \"set height unlimited\"."),
2699 show_pagination_enabled
,
2700 &setlist
, &showlist
);
2702 add_setshow_boolean_cmd ("sevenbit-strings", class_support
,
2703 &sevenbit_strings
, _("\
2704 Set printing of 8-bit characters in strings as \\nnn."), _("\
2705 Show printing of 8-bit characters in strings as \\nnn."), NULL
,
2707 show_sevenbit_strings
,
2708 &setprintlist
, &showprintlist
);
2710 add_setshow_boolean_cmd ("timestamp", class_maintenance
,
2711 &debug_timestamp
, _("\
2712 Set timestamping of debugging messages."), _("\
2713 Show timestamping of debugging messages."), _("\
2714 When set, debugging messages will be marked with seconds and microseconds."),
2716 show_debug_timestamp
,
2717 &setdebuglist
, &showdebuglist
);
2723 address_significant (gdbarch
*gdbarch
, CORE_ADDR addr
)
2725 /* Clear insignificant bits of a target address and sign extend resulting
2726 address, avoiding shifts larger or equal than the width of a CORE_ADDR.
2727 The local variable ADDR_BIT stops the compiler reporting a shift overflow
2728 when it won't occur. Skip updating of target address if current target
2729 has not set gdbarch significant_addr_bit. */
2730 int addr_bit
= gdbarch_significant_addr_bit (gdbarch
);
2732 if (addr_bit
&& (addr_bit
< (sizeof (CORE_ADDR
) * HOST_CHAR_BIT
)))
2734 CORE_ADDR sign
= (CORE_ADDR
) 1 << (addr_bit
- 1);
2735 addr
&= ((CORE_ADDR
) 1 << addr_bit
) - 1;
2736 addr
= (addr
^ sign
) - sign
;
2743 paddress (struct gdbarch
*gdbarch
, CORE_ADDR addr
)
2745 /* Truncate address to the size of a target address, avoiding shifts
2746 larger or equal than the width of a CORE_ADDR. The local
2747 variable ADDR_BIT stops the compiler reporting a shift overflow
2748 when it won't occur. */
2749 /* NOTE: This assumes that the significant address information is
2750 kept in the least significant bits of ADDR - the upper bits were
2751 either zero or sign extended. Should gdbarch_address_to_pointer or
2752 some ADDRESS_TO_PRINTABLE() be used to do the conversion? */
2754 int addr_bit
= gdbarch_addr_bit (gdbarch
);
2756 if (addr_bit
< (sizeof (CORE_ADDR
) * HOST_CHAR_BIT
))
2757 addr
&= ((CORE_ADDR
) 1 << addr_bit
) - 1;
2758 return hex_string (addr
);
2761 /* This function is described in "defs.h". */
2764 print_core_address (struct gdbarch
*gdbarch
, CORE_ADDR address
)
2766 int addr_bit
= gdbarch_addr_bit (gdbarch
);
2768 if (addr_bit
< (sizeof (CORE_ADDR
) * HOST_CHAR_BIT
))
2769 address
&= ((CORE_ADDR
) 1 << addr_bit
) - 1;
2771 /* FIXME: cagney/2002-05-03: Need local_address_string() function
2772 that returns the language localized string formatted to a width
2773 based on gdbarch_addr_bit. */
2775 return hex_string_custom (address
, 8);
2777 return hex_string_custom (address
, 16);
2780 /* Callback hash_f for htab_create_alloc or htab_create_alloc_ex. */
2783 core_addr_hash (const void *ap
)
2785 const CORE_ADDR
*addrp
= (const CORE_ADDR
*) ap
;
2790 /* Callback eq_f for htab_create_alloc or htab_create_alloc_ex. */
2793 core_addr_eq (const void *ap
, const void *bp
)
2795 const CORE_ADDR
*addr_ap
= (const CORE_ADDR
*) ap
;
2796 const CORE_ADDR
*addr_bp
= (const CORE_ADDR
*) bp
;
2798 return *addr_ap
== *addr_bp
;
2801 /* Convert a string back into a CORE_ADDR. */
2803 string_to_core_addr (const char *my_string
)
2807 if (my_string
[0] == '0' && tolower (my_string
[1]) == 'x')
2809 /* Assume that it is in hex. */
2812 for (i
= 2; my_string
[i
] != '\0'; i
++)
2814 if (isdigit (my_string
[i
]))
2815 addr
= (my_string
[i
] - '0') + (addr
* 16);
2816 else if (isxdigit (my_string
[i
]))
2817 addr
= (tolower (my_string
[i
]) - 'a' + 0xa) + (addr
* 16);
2819 error (_("invalid hex \"%s\""), my_string
);
2824 /* Assume that it is in decimal. */
2827 for (i
= 0; my_string
[i
] != '\0'; i
++)
2829 if (isdigit (my_string
[i
]))
2830 addr
= (my_string
[i
] - '0') + (addr
* 10);
2832 error (_("invalid decimal \"%s\""), my_string
);
2842 gdb_realpath_check_trailer (const char *input
, const char *trailer
)
2844 gdb::unique_xmalloc_ptr
<char> result
= gdb_realpath (input
);
2846 size_t len
= strlen (result
.get ());
2847 size_t trail_len
= strlen (trailer
);
2849 SELF_CHECK (len
>= trail_len
2850 && strcmp (result
.get () + len
- trail_len
, trailer
) == 0);
2854 gdb_realpath_tests ()
2856 /* A file which contains a directory prefix. */
2857 gdb_realpath_check_trailer ("./xfullpath.exp", "/xfullpath.exp");
2858 /* A file which contains a directory prefix. */
2859 gdb_realpath_check_trailer ("../../defs.h", "/defs.h");
2860 /* A one-character filename. */
2861 gdb_realpath_check_trailer ("./a", "/a");
2862 /* A file in the root directory. */
2863 gdb_realpath_check_trailer ("/root_file_which_should_exist",
2864 "/root_file_which_should_exist");
2865 /* A file which does not have a directory prefix. */
2866 gdb_realpath_check_trailer ("xfullpath.exp", "xfullpath.exp");
2867 /* A one-char filename without any directory prefix. */
2868 gdb_realpath_check_trailer ("a", "a");
2869 /* An empty filename. */
2870 gdb_realpath_check_trailer ("", "");
2873 #endif /* GDB_SELF_TEST */
2875 /* Allocation function for the libiberty hash table which uses an
2876 obstack. The obstack is passed as DATA. */
2879 hashtab_obstack_allocate (void *data
, size_t size
, size_t count
)
2881 size_t total
= size
* count
;
2882 void *ptr
= obstack_alloc ((struct obstack
*) data
, total
);
2884 memset (ptr
, 0, total
);
2888 /* Trivial deallocation function for the libiberty splay tree and hash
2889 table - don't deallocate anything. Rely on later deletion of the
2890 obstack. DATA will be the obstack, although it is not needed
2894 dummy_obstack_deallocate (void *object
, void *data
)
2899 /* Simple, portable version of dirname that does not modify its
2903 ldirname (const char *filename
)
2905 std::string dirname
;
2906 const char *base
= lbasename (filename
);
2908 while (base
> filename
&& IS_DIR_SEPARATOR (base
[-1]))
2911 if (base
== filename
)
2914 dirname
= std::string (filename
, base
- filename
);
2916 /* On DOS based file systems, convert "d:foo" to "d:.", so that we
2917 create "d:./bar" later instead of the (different) "d:/bar". */
2918 if (base
- filename
== 2 && IS_ABSOLUTE_PATH (base
)
2919 && !IS_DIR_SEPARATOR (filename
[0]))
2920 dirname
[base
++ - filename
] = '.';
2928 gdb_argv::reset (const char *s
)
2930 char **argv
= buildargv (s
);
2932 if (s
!= NULL
&& argv
== NULL
)
2940 compare_positive_ints (const void *ap
, const void *bp
)
2942 /* Because we know we're comparing two ints which are positive,
2943 there's no danger of overflow here. */
2944 return * (int *) ap
- * (int *) bp
;
2947 #define AMBIGUOUS_MESS1 ".\nMatching formats:"
2948 #define AMBIGUOUS_MESS2 \
2949 ".\nUse \"set gnutarget format-name\" to specify the format."
2952 gdb_bfd_errmsg (bfd_error_type error_tag
, char **matching
)
2958 /* Check if errmsg just need simple return. */
2959 if (error_tag
!= bfd_error_file_ambiguously_recognized
|| matching
== NULL
)
2960 return bfd_errmsg (error_tag
);
2962 ret_len
= strlen (bfd_errmsg (error_tag
)) + strlen (AMBIGUOUS_MESS1
)
2963 + strlen (AMBIGUOUS_MESS2
);
2964 for (p
= matching
; *p
; p
++)
2965 ret_len
+= strlen (*p
) + 1;
2966 ret
= (char *) xmalloc (ret_len
+ 1);
2968 make_cleanup (xfree
, ret
);
2970 strcpy (retp
, bfd_errmsg (error_tag
));
2971 retp
+= strlen (retp
);
2973 strcpy (retp
, AMBIGUOUS_MESS1
);
2974 retp
+= strlen (retp
);
2976 for (p
= matching
; *p
; p
++)
2978 sprintf (retp
, " %s", *p
);
2979 retp
+= strlen (retp
);
2983 strcpy (retp
, AMBIGUOUS_MESS2
);
2988 /* Return ARGS parsed as a valid pid, or throw an error. */
2991 parse_pid_to_attach (const char *args
)
2997 error_no_arg (_("process-id to attach"));
2999 dummy
= (char *) args
;
3000 pid
= strtoul (args
, &dummy
, 0);
3001 /* Some targets don't set errno on errors, grrr! */
3002 if ((pid
== 0 && dummy
== args
) || dummy
!= &args
[strlen (args
)])
3003 error (_("Illegal process-id: %s."), args
);
3008 /* Helper for make_bpstat_clear_actions_cleanup. */
3011 do_bpstat_clear_actions_cleanup (void *unused
)
3013 bpstat_clear_actions ();
3016 /* Call bpstat_clear_actions for the case an exception is throw. You should
3017 discard_cleanups if no exception is caught. */
3020 make_bpstat_clear_actions_cleanup (void)
3022 return make_cleanup (do_bpstat_clear_actions_cleanup
, NULL
);
3025 /* Substitute all occurences of string FROM by string TO in *STRINGP. *STRINGP
3026 must come from xrealloc-compatible allocator and it may be updated. FROM
3027 needs to be delimited by IS_DIR_SEPARATOR or DIRNAME_SEPARATOR (or be
3028 located at the start or end of *STRINGP. */
3031 substitute_path_component (char **stringp
, const char *from
, const char *to
)
3033 char *string
= *stringp
, *s
;
3034 const size_t from_len
= strlen (from
);
3035 const size_t to_len
= strlen (to
);
3039 s
= strstr (s
, from
);
3043 if ((s
== string
|| IS_DIR_SEPARATOR (s
[-1])
3044 || s
[-1] == DIRNAME_SEPARATOR
)
3045 && (s
[from_len
] == '\0' || IS_DIR_SEPARATOR (s
[from_len
])
3046 || s
[from_len
] == DIRNAME_SEPARATOR
))
3051 = (char *) xrealloc (string
, (strlen (string
) + to_len
+ 1));
3053 /* Relocate the current S pointer. */
3054 s
= s
- string
+ string_new
;
3055 string
= string_new
;
3057 /* Replace from by to. */
3058 memmove (&s
[to_len
], &s
[from_len
], strlen (&s
[from_len
]) + 1);
3059 memcpy (s
, to
, to_len
);
3074 /* SIGALRM handler for waitpid_with_timeout. */
3077 sigalrm_handler (int signo
)
3079 /* Nothing to do. */
3084 /* Wrapper to wait for child PID to die with TIMEOUT.
3085 TIMEOUT is the time to stop waiting in seconds.
3086 If TIMEOUT is zero, pass WNOHANG to waitpid.
3087 Returns PID if it was successfully waited for, otherwise -1.
3089 Timeouts are currently implemented with alarm and SIGALRM.
3090 If the host does not support them, this waits "forever".
3091 It would be odd though for a host to have waitpid and not SIGALRM. */
3094 wait_to_die_with_timeout (pid_t pid
, int *status
, int timeout
)
3096 pid_t waitpid_result
;
3098 gdb_assert (pid
> 0);
3099 gdb_assert (timeout
>= 0);
3104 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
3105 struct sigaction sa
, old_sa
;
3107 sa
.sa_handler
= sigalrm_handler
;
3108 sigemptyset (&sa
.sa_mask
);
3110 sigaction (SIGALRM
, &sa
, &old_sa
);
3114 ofunc
= signal (SIGALRM
, sigalrm_handler
);
3120 waitpid_result
= waitpid (pid
, status
, 0);
3124 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
3125 sigaction (SIGALRM
, &old_sa
, NULL
);
3127 signal (SIGALRM
, ofunc
);
3132 waitpid_result
= waitpid (pid
, status
, WNOHANG
);
3134 if (waitpid_result
== pid
)
3140 #endif /* HAVE_WAITPID */
3142 /* Provide fnmatch compatible function for FNM_FILE_NAME matching of host files.
3143 Both FNM_FILE_NAME and FNM_NOESCAPE must be set in FLAGS.
3145 It handles correctly HAVE_DOS_BASED_FILE_SYSTEM and
3146 HAVE_CASE_INSENSITIVE_FILE_SYSTEM. */
3149 gdb_filename_fnmatch (const char *pattern
, const char *string
, int flags
)
3151 gdb_assert ((flags
& FNM_FILE_NAME
) != 0);
3153 /* It is unclear how '\' escaping vs. directory separator should coexist. */
3154 gdb_assert ((flags
& FNM_NOESCAPE
) != 0);
3156 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
3158 char *pattern_slash
, *string_slash
;
3160 /* Replace '\' by '/' in both strings. */
3162 pattern_slash
= (char *) alloca (strlen (pattern
) + 1);
3163 strcpy (pattern_slash
, pattern
);
3164 pattern
= pattern_slash
;
3165 for (; *pattern_slash
!= 0; pattern_slash
++)
3166 if (IS_DIR_SEPARATOR (*pattern_slash
))
3167 *pattern_slash
= '/';
3169 string_slash
= (char *) alloca (strlen (string
) + 1);
3170 strcpy (string_slash
, string
);
3171 string
= string_slash
;
3172 for (; *string_slash
!= 0; string_slash
++)
3173 if (IS_DIR_SEPARATOR (*string_slash
))
3174 *string_slash
= '/';
3176 #endif /* HAVE_DOS_BASED_FILE_SYSTEM */
3178 #ifdef HAVE_CASE_INSENSITIVE_FILE_SYSTEM
3179 flags
|= FNM_CASEFOLD
;
3180 #endif /* HAVE_CASE_INSENSITIVE_FILE_SYSTEM */
3182 return fnmatch (pattern
, string
, flags
);
3185 /* Return the number of path elements in PATH.
3193 count_path_elements (const char *path
)
3196 const char *p
= path
;
3198 if (HAS_DRIVE_SPEC (p
))
3200 p
= STRIP_DRIVE_SPEC (p
);
3206 if (IS_DIR_SEPARATOR (*p
))
3211 /* Backup one if last character is /, unless it's the only one. */
3212 if (p
> path
+ 1 && IS_DIR_SEPARATOR (p
[-1]))
3215 /* Add one for the file name, if present. */
3216 if (p
> path
&& !IS_DIR_SEPARATOR (p
[-1]))
3222 /* Remove N leading path elements from PATH.
3223 N must be non-negative.
3224 If PATH has more than N path elements then return NULL.
3225 If PATH has exactly N path elements then return "".
3226 See count_path_elements for a description of how we do the counting. */
3229 strip_leading_path_elements (const char *path
, int n
)
3232 const char *p
= path
;
3234 gdb_assert (n
>= 0);
3239 if (HAS_DRIVE_SPEC (p
))
3241 p
= STRIP_DRIVE_SPEC (p
);
3247 while (*p
!= '\0' && !IS_DIR_SEPARATOR (*p
))
3263 _initialize_utils (void)
3265 add_internal_problem_command (&internal_error_problem
);
3266 add_internal_problem_command (&internal_warning_problem
);
3267 add_internal_problem_command (&demangler_warning_problem
);
3270 selftests::register_test ("gdb_realpath", gdb_realpath_tests
);