1 /* General utility routines for GDB, the GNU debugger.
3 Copyright (C) 1986-2019 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/>. */
22 #include "common/gdb_wait.h"
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 "common/job-control.h"
69 #include "common/selftest.h"
70 #include "common/gdb_optional.h"
71 #include "cp-support.h"
73 #include "common/pathstuff.h"
74 #include "cli/cli-style.h"
75 #include "common/scope-exit.h"
77 void (*deprecated_error_begin_hook
) (void);
79 /* Prototypes for local functions */
81 static void vfprintf_maybe_filtered (struct ui_file
*, const char *,
82 va_list, int) ATTRIBUTE_PRINTF (2, 0);
84 static void fputs_maybe_filtered (const char *, struct ui_file
*, int);
86 static void prompt_for_continue (void);
88 static void set_screen_size (void);
89 static void set_width (void);
91 /* Time spent in prompt_for_continue in the currently executing command
92 waiting for user to respond.
93 Initialized in make_command_stats_cleanup.
94 Modified in prompt_for_continue and defaulted_query.
95 Used in report_command_stats. */
97 static std::chrono::steady_clock::duration prompt_for_continue_wait_time
;
99 /* A flag indicating whether to timestamp debugging messages. */
101 static int debug_timestamp
= 0;
103 /* Nonzero means that strings with character values >0x7F should be printed
104 as octal escapes. Zero means just print the value (e.g. it's an
105 international character, and the terminal or window can cope.) */
107 int sevenbit_strings
= 0;
109 show_sevenbit_strings (struct ui_file
*file
, int from_tty
,
110 struct cmd_list_element
*c
, const char *value
)
112 fprintf_filtered (file
, _("Printing of 8-bit characters "
113 "in strings as \\nnn is %s.\n"),
117 /* String to be printed before warning messages, if any. */
119 const char *warning_pre_print
= "\nwarning: ";
121 int pagination_enabled
= 1;
123 show_pagination_enabled (struct ui_file
*file
, int from_tty
,
124 struct cmd_list_element
*c
, const char *value
)
126 fprintf_filtered (file
, _("State of pagination is %s.\n"), value
);
130 /* Cleanup utilities.
132 These are not defined in cleanups.c (nor declared in cleanups.h)
133 because while they use the "cleanup API" they are not part of the
136 /* This function is useful for cleanups.
140 old_chain = make_cleanup (free_current_contents, &foo);
142 to arrange to free the object thus allocated. */
145 free_current_contents (void *ptr
)
147 void **location
= (void **) ptr
;
149 if (location
== NULL
)
150 internal_error (__FILE__
, __LINE__
,
151 _("free_current_contents: NULL pointer"));
152 if (*location
!= NULL
)
161 /* Print a warning message. The first argument STRING is the warning
162 message, used as an fprintf format string, the second is the
163 va_list of arguments for that string. A warning is unfiltered (not
164 paginated) so that the user does not need to page through each
165 screen full of warnings when there are lots of them. */
168 vwarning (const char *string
, va_list args
)
170 if (deprecated_warning_hook
)
171 (*deprecated_warning_hook
) (string
, args
);
174 gdb::optional
<target_terminal::scoped_restore_terminal_state
> term_state
;
175 if (target_supports_terminal_ours ())
177 term_state
.emplace ();
178 target_terminal::ours_for_output ();
180 if (filtered_printing_initialized ())
181 wrap_here (""); /* Force out any buffered output. */
182 gdb_flush (gdb_stdout
);
183 if (warning_pre_print
)
184 fputs_unfiltered (warning_pre_print
, gdb_stderr
);
185 vfprintf_unfiltered (gdb_stderr
, string
, args
);
186 fprintf_unfiltered (gdb_stderr
, "\n");
190 /* Print an error message and return to command level.
191 The first argument STRING is the error message, used as a fprintf string,
192 and the remaining args are passed as arguments to it. */
195 verror (const char *string
, va_list args
)
197 throw_verror (GENERIC_ERROR
, string
, args
);
201 error_stream (const string_file
&stream
)
203 error (("%s"), stream
.c_str ());
206 /* Emit a message and abort. */
208 static void ATTRIBUTE_NORETURN
209 abort_with_message (const char *msg
)
211 if (current_ui
== NULL
)
214 fputs_unfiltered (msg
, gdb_stderr
);
216 abort (); /* NOTE: GDB has only three calls to abort(). */
219 /* Dump core trying to increase the core soft limit to hard limit first. */
224 #ifdef HAVE_SETRLIMIT
225 struct rlimit rlim
= { (rlim_t
) RLIM_INFINITY
, (rlim_t
) RLIM_INFINITY
};
227 setrlimit (RLIMIT_CORE
, &rlim
);
228 #endif /* HAVE_SETRLIMIT */
230 abort (); /* NOTE: GDB has only three calls to abort(). */
233 /* Check whether GDB will be able to dump core using the dump_core
234 function. Returns zero if GDB cannot or should not dump core.
235 If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected.
236 If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */
239 can_dump_core (enum resource_limit_kind limit_kind
)
241 #ifdef HAVE_GETRLIMIT
244 /* Be quiet and assume we can dump if an error is returned. */
245 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
251 if (rlim
.rlim_cur
== 0)
256 if (rlim
.rlim_max
== 0)
259 #endif /* HAVE_GETRLIMIT */
264 /* Print a warning that we cannot dump core. */
267 warn_cant_dump_core (const char *reason
)
269 fprintf_unfiltered (gdb_stderr
,
270 _("%s\nUnable to dump core, use `ulimit -c"
271 " unlimited' before executing GDB next time.\n"),
275 /* Check whether GDB will be able to dump core using the dump_core
276 function, and print a warning if we cannot. */
279 can_dump_core_warn (enum resource_limit_kind limit_kind
,
282 int core_dump_allowed
= can_dump_core (limit_kind
);
284 if (!core_dump_allowed
)
285 warn_cant_dump_core (reason
);
287 return core_dump_allowed
;
290 /* Allow the user to configure the debugger behavior with respect to
291 what to do when an internal problem is detected. */
293 const char internal_problem_ask
[] = "ask";
294 const char internal_problem_yes
[] = "yes";
295 const char internal_problem_no
[] = "no";
296 static const char *const internal_problem_modes
[] =
298 internal_problem_ask
,
299 internal_problem_yes
,
304 /* Print a message reporting an internal error/warning. Ask the user
305 if they want to continue, dump core, or just exit. Return
306 something to indicate a quit. */
308 struct internal_problem
311 int user_settable_should_quit
;
312 const char *should_quit
;
313 int user_settable_should_dump_core
;
314 const char *should_dump_core
;
317 /* Report a problem, internal to GDB, to the user. Once the problem
318 has been reported, and assuming GDB didn't quit, the caller can
319 either allow execution to resume or throw an error. */
321 static void ATTRIBUTE_PRINTF (4, 0)
322 internal_vproblem (struct internal_problem
*problem
,
323 const char *file
, int line
, const char *fmt
, va_list ap
)
330 /* Don't allow infinite error/warning recursion. */
332 static char msg
[] = "Recursive internal problem.\n";
341 abort_with_message (msg
);
344 /* Newer GLIBC versions put the warn_unused_result attribute
345 on write, but this is one of those rare cases where
346 ignoring the return value is correct. Casting to (void)
347 does not fix this problem. This is the solution suggested
348 at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509. */
349 if (write (STDERR_FILENO
, msg
, sizeof (msg
)) != sizeof (msg
))
350 abort (); /* NOTE: GDB has only three calls to abort(). */
355 /* Create a string containing the full error/warning message. Need
356 to call query with this full string, as otherwize the reason
357 (error/warning) and question become separated. Format using a
358 style similar to a compiler error message. Include extra detail
359 so that the user knows that they are living on the edge. */
361 std::string msg
= string_vprintf (fmt
, ap
);
362 reason
= string_printf ("%s:%d: %s: %s\n"
363 "A problem internal to GDB has been detected,\n"
364 "further debugging may prove unreliable.",
365 file
, line
, problem
->name
, msg
.c_str ());
368 /* Fall back to abort_with_message if gdb_stderr is not set up. */
369 if (current_ui
== NULL
)
371 fputs (reason
.c_str (), stderr
);
372 abort_with_message ("\n");
375 /* Try to get the message out and at the start of a new line. */
376 gdb::optional
<target_terminal::scoped_restore_terminal_state
> term_state
;
377 if (target_supports_terminal_ours ())
379 term_state
.emplace ();
380 target_terminal::ours_for_output ();
382 if (filtered_printing_initialized ())
385 /* Emit the message unless query will emit it below. */
386 if (problem
->should_quit
!= internal_problem_ask
388 || !filtered_printing_initialized ())
389 fprintf_unfiltered (gdb_stderr
, "%s\n", reason
.c_str ());
391 if (problem
->should_quit
== internal_problem_ask
)
393 /* Default (yes/batch case) is to quit GDB. When in batch mode
394 this lessens the likelihood of GDB going into an infinite
396 if (!confirm
|| !filtered_printing_initialized ())
399 quit_p
= query (_("%s\nQuit this debugging session? "),
402 else if (problem
->should_quit
== internal_problem_yes
)
404 else if (problem
->should_quit
== internal_problem_no
)
407 internal_error (__FILE__
, __LINE__
, _("bad switch"));
409 fputs_unfiltered (_("\nThis is a bug, please report it."), gdb_stderr
);
410 if (REPORT_BUGS_TO
[0])
411 fprintf_unfiltered (gdb_stderr
, _(" For instructions, see:\n%s."),
413 fputs_unfiltered ("\n\n", gdb_stderr
);
415 if (problem
->should_dump_core
== internal_problem_ask
)
417 if (!can_dump_core_warn (LIMIT_MAX
, reason
.c_str ()))
419 else if (!filtered_printing_initialized ())
423 /* Default (yes/batch case) is to dump core. This leaves a GDB
424 `dropping' so that it is easier to see that something went
426 dump_core_p
= query (_("%s\nCreate a core file of GDB? "),
430 else if (problem
->should_dump_core
== internal_problem_yes
)
431 dump_core_p
= can_dump_core_warn (LIMIT_MAX
, reason
.c_str ());
432 else if (problem
->should_dump_core
== internal_problem_no
)
435 internal_error (__FILE__
, __LINE__
, _("bad switch"));
448 #ifdef HAVE_WORKING_FORK
458 static struct internal_problem internal_error_problem
= {
459 "internal-error", 1, internal_problem_ask
, 1, internal_problem_ask
463 internal_verror (const char *file
, int line
, const char *fmt
, va_list ap
)
465 internal_vproblem (&internal_error_problem
, file
, line
, fmt
, ap
);
466 throw_quit (_("Command aborted."));
469 static struct internal_problem internal_warning_problem
= {
470 "internal-warning", 1, internal_problem_ask
, 1, internal_problem_ask
474 internal_vwarning (const char *file
, int line
, const char *fmt
, va_list ap
)
476 internal_vproblem (&internal_warning_problem
, file
, line
, fmt
, ap
);
479 static struct internal_problem demangler_warning_problem
= {
480 "demangler-warning", 1, internal_problem_ask
, 0, internal_problem_no
484 demangler_vwarning (const char *file
, int line
, const char *fmt
, va_list ap
)
486 internal_vproblem (&demangler_warning_problem
, file
, line
, fmt
, ap
);
490 demangler_warning (const char *file
, int line
, const char *string
, ...)
494 va_start (ap
, string
);
495 demangler_vwarning (file
, line
, string
, ap
);
499 /* Dummy functions to keep add_prefix_cmd happy. */
502 set_internal_problem_cmd (const char *args
, int from_tty
)
507 show_internal_problem_cmd (const char *args
, int from_tty
)
511 /* When GDB reports an internal problem (error or warning) it gives
512 the user the opportunity to quit GDB and/or create a core file of
513 the current debug session. This function registers a few commands
514 that make it possible to specify that GDB should always or never
515 quit or create a core file, without asking. The commands look
518 maint set PROBLEM-NAME quit ask|yes|no
519 maint show PROBLEM-NAME quit
520 maint set PROBLEM-NAME corefile ask|yes|no
521 maint show PROBLEM-NAME corefile
523 Where PROBLEM-NAME is currently "internal-error" or
524 "internal-warning". */
527 add_internal_problem_command (struct internal_problem
*problem
)
529 struct cmd_list_element
**set_cmd_list
;
530 struct cmd_list_element
**show_cmd_list
;
534 set_cmd_list
= XNEW (struct cmd_list_element
*);
535 show_cmd_list
= XNEW (struct cmd_list_element
*);
536 *set_cmd_list
= NULL
;
537 *show_cmd_list
= NULL
;
539 set_doc
= xstrprintf (_("Configure what GDB does when %s is detected."),
542 show_doc
= xstrprintf (_("Show what GDB does when %s is detected."),
545 add_prefix_cmd (problem
->name
,
546 class_maintenance
, set_internal_problem_cmd
, set_doc
,
548 concat ("maintenance set ", problem
->name
, " ",
550 0/*allow-unknown*/, &maintenance_set_cmdlist
);
552 add_prefix_cmd (problem
->name
,
553 class_maintenance
, show_internal_problem_cmd
, show_doc
,
555 concat ("maintenance show ", problem
->name
, " ",
557 0/*allow-unknown*/, &maintenance_show_cmdlist
);
559 if (problem
->user_settable_should_quit
)
561 set_doc
= xstrprintf (_("Set whether GDB should quit "
562 "when an %s is detected"),
564 show_doc
= xstrprintf (_("Show whether GDB will quit "
565 "when an %s is detected"),
567 add_setshow_enum_cmd ("quit", class_maintenance
,
568 internal_problem_modes
,
569 &problem
->should_quit
,
582 if (problem
->user_settable_should_dump_core
)
584 set_doc
= xstrprintf (_("Set whether GDB should create a core "
585 "file of GDB when %s is detected"),
587 show_doc
= xstrprintf (_("Show whether GDB will create a core "
588 "file of GDB when %s is detected"),
590 add_setshow_enum_cmd ("corefile", class_maintenance
,
591 internal_problem_modes
,
592 &problem
->should_dump_core
,
606 /* Return a newly allocated string, containing the PREFIX followed
607 by the system error message for errno (separated by a colon). */
610 perror_string (const char *prefix
)
614 err
= safe_strerror (errno
);
615 return std::string (prefix
) + ": " + err
;
618 /* Print the system error message for errno, and also mention STRING
619 as the file name for which the error was encountered. Use ERRCODE
620 for the thrown exception. Then return to command level. */
623 throw_perror_with_name (enum errors errcode
, const char *string
)
625 std::string combined
= perror_string (string
);
627 /* I understand setting these is a matter of taste. Still, some people
628 may clear errno but not know about bfd_error. Doing this here is not
630 bfd_set_error (bfd_error_no_error
);
633 throw_error (errcode
, _("%s."), combined
.c_str ());
636 /* See throw_perror_with_name, ERRCODE defaults here to GENERIC_ERROR. */
639 perror_with_name (const char *string
)
641 throw_perror_with_name (GENERIC_ERROR
, string
);
644 /* Same as perror_with_name except that it prints a warning instead
645 of throwing an error. */
648 perror_warning_with_name (const char *string
)
650 std::string combined
= perror_string (string
);
651 warning (_("%s"), combined
.c_str ());
654 /* Print the system error message for ERRCODE, and also mention STRING
655 as the file name for which the error was encountered. */
658 print_sys_errmsg (const char *string
, int errcode
)
663 err
= safe_strerror (errcode
);
664 combined
= (char *) alloca (strlen (err
) + strlen (string
) + 3);
665 strcpy (combined
, string
);
666 strcat (combined
, ": ");
667 strcat (combined
, err
);
669 /* We want anything which was printed on stdout to come out first, before
671 gdb_flush (gdb_stdout
);
672 fprintf_unfiltered (gdb_stderr
, "%s.\n", combined
);
675 /* Control C eventually causes this to be called, at a convenient time. */
680 if (sync_quit_force_run
)
682 sync_quit_force_run
= 0;
683 quit_force (NULL
, 0);
687 /* No steenking SIGINT will ever be coming our way when the
688 program is resumed. Don't lie. */
692 /* If there is no terminal switching for this target, then we can't
693 possibly get screwed by the lack of job control. */
694 || !target_supports_terminal_ours ())
697 throw_quit ("Quit (expect signal SIGINT when the program is resumed)");
706 if (sync_quit_force_run
)
711 if (deprecated_interactive_hook
)
712 deprecated_interactive_hook ();
716 /* Called when a memory allocation fails, with the number of bytes of
717 memory requested in SIZE. */
720 malloc_failure (long size
)
724 internal_error (__FILE__
, __LINE__
,
725 _("virtual memory exhausted: can't allocate %ld bytes."),
730 internal_error (__FILE__
, __LINE__
, _("virtual memory exhausted."));
734 /* My replacement for the read system call.
735 Used like `read' but keeps going if `read' returns too soon. */
738 myread (int desc
, char *addr
, int len
)
745 val
= read (desc
, addr
, len
);
757 print_spaces (int n
, struct ui_file
*file
)
759 fputs_unfiltered (n_spaces (n
), file
);
762 /* Print a host address. */
765 gdb_print_host_address_1 (const void *addr
, struct ui_file
*stream
)
767 fprintf_filtered (stream
, "%s", host_address_to_string (addr
));
773 make_hex_string (const gdb_byte
*data
, size_t length
)
775 char *result
= (char *) xmalloc (length
* 2 + 1);
780 for (i
= 0; i
< length
; ++i
)
781 p
+= xsnprintf (p
, 3, "%02x", data
[i
]);
788 /* An RAII class that sets up to handle input and then tears down
789 during destruction. */
791 class scoped_input_handler
795 scoped_input_handler ()
796 : m_quit_handler (&quit_handler
, default_quit_handler
),
799 target_terminal::ours ();
800 ui_register_input_event_handler (current_ui
);
801 if (current_ui
->prompt_state
== PROMPT_BLOCKED
)
805 ~scoped_input_handler ()
808 ui_unregister_input_event_handler (m_ui
);
811 DISABLE_COPY_AND_ASSIGN (scoped_input_handler
);
815 /* Save and restore the terminal state. */
816 target_terminal::scoped_restore_terminal_state m_term_state
;
818 /* Save and restore the quit handler. */
819 scoped_restore_tmpl
<quit_handler_ftype
*> m_quit_handler
;
821 /* The saved UI, if non-NULL. */
827 /* This function supports the query, nquery, and yquery functions.
828 Ask user a y-or-n question and return 0 if answer is no, 1 if
829 answer is yes, or default the answer to the specified default
830 (for yquery or nquery). DEFCHAR may be 'y' or 'n' to provide a
831 default answer, or '\0' for no default.
832 CTLSTR is the control string and should end in "? ". It should
833 not say how to answer, because we do that.
834 ARGS are the arguments passed along with the CTLSTR argument to
837 static int ATTRIBUTE_PRINTF (1, 0)
838 defaulted_query (const char *ctlstr
, const char defchar
, va_list args
)
842 char def_answer
, not_def_answer
;
843 const char *y_string
, *n_string
;
845 /* Set up according to which answer is the default. */
850 not_def_answer
= 'N';
854 else if (defchar
== 'y')
858 not_def_answer
= 'N';
866 not_def_answer
= 'Y';
871 /* Automatically answer the default value if the user did not want
872 prompts or the command was issued with the server prefix. */
873 if (!confirm
|| server_command
)
876 /* If input isn't coming from the user directly, just say what
877 question we're asking, and then answer the default automatically. This
878 way, important error messages don't get lost when talking to GDB
880 if (current_ui
->instream
!= current_ui
->stdin_stream
881 || !input_interactive_p (current_ui
)
882 /* Restrict queries to the main UI. */
883 || current_ui
!= main_ui
)
885 target_terminal::scoped_restore_terminal_state term_state
;
886 target_terminal::ours_for_output ();
888 vfprintf_filtered (gdb_stdout
, ctlstr
, args
);
890 printf_filtered (_("(%s or %s) [answered %c; "
891 "input not from terminal]\n"),
892 y_string
, n_string
, def_answer
);
893 gdb_flush (gdb_stdout
);
898 if (deprecated_query_hook
)
900 target_terminal::scoped_restore_terminal_state term_state
;
901 return deprecated_query_hook (ctlstr
, args
);
904 /* Format the question outside of the loop, to avoid reusing args. */
905 std::string question
= string_vprintf (ctlstr
, args
);
907 = string_printf (_("%s%s(%s or %s) %s"),
908 annotation_level
> 1 ? "\n\032\032pre-query\n" : "",
909 question
.c_str (), y_string
, n_string
,
910 annotation_level
> 1 ? "\n\032\032query\n" : "");
912 /* Used to add duration we waited for user to respond to
913 prompt_for_continue_wait_time. */
914 using namespace std::chrono
;
915 steady_clock::time_point prompt_started
= steady_clock::now ();
917 scoped_input_handler prepare_input
;
921 char *response
, answer
;
923 gdb_flush (gdb_stdout
);
924 response
= gdb_readline_wrapper (prompt
.c_str ());
926 if (response
== NULL
) /* C-d */
928 printf_filtered ("EOF [assumed %c]\n", def_answer
);
933 answer
= response
[0];
938 /* Check answer. For the non-default, the user must specify
939 the non-default explicitly. */
940 if (answer
== not_def_answer
)
945 /* Otherwise, if a default was specified, the user may either
946 specify the required input or have it default by entering
948 if (answer
== def_answer
949 || (defchar
!= '\0' && answer
== '\0'))
954 /* Invalid entries are not defaulted and require another selection. */
955 printf_filtered (_("Please answer %s or %s.\n"),
959 /* Add time spend in this routine to prompt_for_continue_wait_time. */
960 prompt_for_continue_wait_time
+= steady_clock::now () - prompt_started
;
962 if (annotation_level
> 1)
963 printf_filtered (("\n\032\032post-query\n"));
968 /* Ask user a y-or-n question and return 0 if answer is no, 1 if
969 answer is yes, or 0 if answer is defaulted.
970 Takes three args which are given to printf to print the question.
971 The first, a control string, should end in "? ".
972 It should not say how to answer, because we do that. */
975 nquery (const char *ctlstr
, ...)
980 va_start (args
, ctlstr
);
981 ret
= defaulted_query (ctlstr
, 'n', args
);
986 /* Ask user a y-or-n question and return 0 if answer is no, 1 if
987 answer is yes, or 1 if answer is defaulted.
988 Takes three args which are given to printf to print the question.
989 The first, a control string, should end in "? ".
990 It should not say how to answer, because we do that. */
993 yquery (const char *ctlstr
, ...)
998 va_start (args
, ctlstr
);
999 ret
= defaulted_query (ctlstr
, 'y', args
);
1004 /* Ask user a y-or-n question and return 1 iff answer is yes.
1005 Takes three args which are given to printf to print the question.
1006 The first, a control string, should end in "? ".
1007 It should not say how to answer, because we do that. */
1010 query (const char *ctlstr
, ...)
1015 va_start (args
, ctlstr
);
1016 ret
= defaulted_query (ctlstr
, '\0', args
);
1021 /* A helper for parse_escape that converts a host character to a
1022 target character. C is the host character. If conversion is
1023 possible, then the target character is stored in *TARGET_C and the
1024 function returns 1. Otherwise, the function returns 0. */
1027 host_char_to_target (struct gdbarch
*gdbarch
, int c
, int *target_c
)
1032 auto_obstack host_data
;
1034 convert_between_encodings (target_charset (gdbarch
), host_charset (),
1035 (gdb_byte
*) &the_char
, 1, 1,
1036 &host_data
, translit_none
);
1038 if (obstack_object_size (&host_data
) == 1)
1041 *target_c
= *(char *) obstack_base (&host_data
);
1047 /* Parse a C escape sequence. STRING_PTR points to a variable
1048 containing a pointer to the string to parse. That pointer
1049 should point to the character after the \. That pointer
1050 is updated past the characters we use. The value of the
1051 escape sequence is returned.
1053 A negative value means the sequence \ newline was seen,
1054 which is supposed to be equivalent to nothing at all.
1056 If \ is followed by a null character, we return a negative
1057 value and leave the string pointer pointing at the null character.
1059 If \ is followed by 000, we return 0 and leave the string pointer
1060 after the zeros. A value of 0 does not mean end of string. */
1063 parse_escape (struct gdbarch
*gdbarch
, const char **string_ptr
)
1065 int target_char
= -2; /* Initialize to avoid GCC warnings. */
1066 int c
= *(*string_ptr
)++;
1085 int i
= host_hex_value (c
);
1090 if (isdigit (c
) && c
!= '8' && c
!= '9')
1094 i
+= host_hex_value (c
);
1130 if (!host_char_to_target (gdbarch
, c
, &target_char
))
1131 error (_("The escape sequence `\\%c' is equivalent to plain `%c',"
1132 " which has no equivalent\nin the `%s' character set."),
1133 c
, c
, target_charset (gdbarch
));
1137 /* Print the character C on STREAM as part of the contents of a literal
1138 string whose delimiter is QUOTER. Note that this routine should only
1139 be called for printing things which are independent of the language
1140 of the program being debugged.
1142 printchar will normally escape backslashes and instances of QUOTER. If
1143 QUOTER is 0, printchar won't escape backslashes or any quoting character.
1144 As a side effect, if you pass the backslash character as the QUOTER,
1145 printchar will escape backslashes as usual, but not any other quoting
1149 printchar (int c
, do_fputc_ftype do_fputc
, ui_file
*stream
, int quoter
)
1151 c
&= 0xFF; /* Avoid sign bit follies */
1153 if (c
< 0x20 || /* Low control chars */
1154 (c
>= 0x7F && c
< 0xA0) || /* DEL, High controls */
1155 (sevenbit_strings
&& c
>= 0x80))
1156 { /* high order bit set */
1157 do_fputc ('\\', stream
);
1162 do_fputc ('n', stream
);
1165 do_fputc ('b', stream
);
1168 do_fputc ('t', stream
);
1171 do_fputc ('f', stream
);
1174 do_fputc ('r', stream
);
1177 do_fputc ('e', stream
);
1180 do_fputc ('a', stream
);
1184 do_fputc ('0' + ((c
>> 6) & 0x7), stream
);
1185 do_fputc ('0' + ((c
>> 3) & 0x7), stream
);
1186 do_fputc ('0' + ((c
>> 0) & 0x7), stream
);
1193 if (quoter
!= 0 && (c
== '\\' || c
== quoter
))
1194 do_fputc ('\\', stream
);
1195 do_fputc (c
, stream
);
1199 /* Print the character C on STREAM as part of the contents of a
1200 literal string whose delimiter is QUOTER. Note that these routines
1201 should only be call for printing things which are independent of
1202 the language of the program being debugged. */
1205 fputstr_filtered (const char *str
, int quoter
, struct ui_file
*stream
)
1208 printchar (*str
++, fputc_filtered
, stream
, quoter
);
1212 fputstr_unfiltered (const char *str
, int quoter
, struct ui_file
*stream
)
1215 printchar (*str
++, fputc_unfiltered
, stream
, quoter
);
1219 fputstrn_filtered (const char *str
, int n
, int quoter
,
1220 struct ui_file
*stream
)
1222 for (int i
= 0; i
< n
; i
++)
1223 printchar (str
[i
], fputc_filtered
, stream
, quoter
);
1227 fputstrn_unfiltered (const char *str
, int n
, int quoter
,
1228 do_fputc_ftype do_fputc
, struct ui_file
*stream
)
1230 for (int i
= 0; i
< n
; i
++)
1231 printchar (str
[i
], do_fputc
, stream
, quoter
);
1235 /* Number of lines per page or UINT_MAX if paging is disabled. */
1236 static unsigned int lines_per_page
;
1238 show_lines_per_page (struct ui_file
*file
, int from_tty
,
1239 struct cmd_list_element
*c
, const char *value
)
1241 fprintf_filtered (file
,
1242 _("Number of lines gdb thinks are in a page is %s.\n"),
1246 /* Number of chars per line or UINT_MAX if line folding is disabled. */
1247 static unsigned int chars_per_line
;
1249 show_chars_per_line (struct ui_file
*file
, int from_tty
,
1250 struct cmd_list_element
*c
, const char *value
)
1252 fprintf_filtered (file
,
1253 _("Number of characters gdb thinks "
1254 "are in a line is %s.\n"),
1258 /* Current count of lines printed on this page, chars on this line. */
1259 static unsigned int lines_printed
, chars_printed
;
1261 /* True if pagination is disabled for just one command. */
1263 static bool pagination_disabled_for_command
;
1265 /* Buffer and start column of buffered text, for doing smarter word-
1266 wrapping. When someone calls wrap_here(), we start buffering output
1267 that comes through fputs_filtered(). If we see a newline, we just
1268 spit it out and forget about the wrap_here(). If we see another
1269 wrap_here(), we spit it out and remember the newer one. If we see
1270 the end of the line, we spit out a newline, the indent, and then
1271 the buffered output. */
1273 static bool filter_initialized
= false;
1275 /* Contains characters which are waiting to be output (they have
1276 already been counted in chars_printed). */
1277 static std::string wrap_buffer
;
1279 /* String to indent by if the wrap occurs. Must not be NULL if wrap_column
1281 static const char *wrap_indent
;
1283 /* Column number on the screen where wrap_buffer begins, or 0 if wrapping
1284 is not in effect. */
1285 static int wrap_column
;
1287 /* The style applied at the time that wrap_here was called. */
1288 static ui_file_style wrap_style
;
1291 /* Initialize the number of lines per page and chars per line. */
1294 init_page_info (void)
1298 lines_per_page
= UINT_MAX
;
1299 chars_per_line
= UINT_MAX
;
1303 if (!tui_get_command_dimension (&chars_per_line
, &lines_per_page
))
1308 #if defined(__GO32__)
1309 rows
= ScreenRows ();
1310 cols
= ScreenCols ();
1311 lines_per_page
= rows
;
1312 chars_per_line
= cols
;
1314 /* Make sure Readline has initialized its terminal settings. */
1315 rl_reset_terminal (NULL
);
1317 /* Get the screen size from Readline. */
1318 rl_get_screen_size (&rows
, &cols
);
1319 lines_per_page
= rows
;
1320 chars_per_line
= cols
;
1322 /* Readline should have fetched the termcap entry for us.
1323 Only try to use tgetnum function if rl_get_screen_size
1324 did not return a useful value. */
1325 if (((rows
<= 0) && (tgetnum ((char *) "li") < 0))
1326 /* Also disable paging if inside Emacs. $EMACS was used
1327 before Emacs v25.1, $INSIDE_EMACS is used since then. */
1328 || getenv ("EMACS") || getenv ("INSIDE_EMACS"))
1330 /* The number of lines per page is not mentioned in the terminal
1331 description or EMACS evironment variable is set. This probably
1332 means that paging is not useful, so disable paging. */
1333 lines_per_page
= UINT_MAX
;
1336 /* If the output is not a terminal, don't paginate it. */
1337 if (!ui_file_isatty (gdb_stdout
))
1338 lines_per_page
= UINT_MAX
;
1342 /* We handle SIGWINCH ourselves. */
1343 rl_catch_sigwinch
= 0;
1349 /* Return nonzero if filtered printing is initialized. */
1351 filtered_printing_initialized (void)
1353 return filter_initialized
;
1356 set_batch_flag_and_restore_page_info::set_batch_flag_and_restore_page_info ()
1357 : m_save_lines_per_page (lines_per_page
),
1358 m_save_chars_per_line (chars_per_line
),
1359 m_save_batch_flag (batch_flag
)
1365 set_batch_flag_and_restore_page_info::~set_batch_flag_and_restore_page_info ()
1367 batch_flag
= m_save_batch_flag
;
1368 chars_per_line
= m_save_chars_per_line
;
1369 lines_per_page
= m_save_lines_per_page
;
1375 /* Set the screen size based on LINES_PER_PAGE and CHARS_PER_LINE. */
1378 set_screen_size (void)
1380 int rows
= lines_per_page
;
1381 int cols
= chars_per_line
;
1383 /* If we get 0 or negative ROWS or COLS, treat as "infinite" size.
1384 A negative number can be seen here with the "set width/height"
1385 commands and either:
1387 - the user specified "unlimited", which maps to UINT_MAX, or
1388 - the user spedified some number between INT_MAX and UINT_MAX.
1390 Cap "infinity" to approximately sqrt(INT_MAX) so that we don't
1391 overflow in rl_set_screen_size, which multiplies rows and columns
1392 to compute the number of characters on the screen. */
1394 const int sqrt_int_max
= INT_MAX
>> (sizeof (int) * 8 / 2);
1396 if (rows
<= 0 || rows
> sqrt_int_max
)
1398 rows
= sqrt_int_max
;
1399 lines_per_page
= UINT_MAX
;
1402 if (cols
<= 0 || cols
> sqrt_int_max
)
1404 cols
= sqrt_int_max
;
1405 chars_per_line
= UINT_MAX
;
1408 /* Update Readline's idea of the terminal size. */
1409 rl_set_screen_size (rows
, cols
);
1412 /* Reinitialize WRAP_BUFFER. */
1417 if (chars_per_line
== 0)
1420 wrap_buffer
.clear ();
1421 filter_initialized
= true;
1425 set_width_command (const char *args
, int from_tty
, struct cmd_list_element
*c
)
1432 set_height_command (const char *args
, int from_tty
, struct cmd_list_element
*c
)
1440 set_screen_width_and_height (int width
, int height
)
1442 lines_per_page
= height
;
1443 chars_per_line
= width
;
1449 /* The currently applied style. */
1451 static ui_file_style applied_style
;
1453 /* Emit an ANSI style escape for STYLE. If STREAM is nullptr, emit to
1454 the wrap buffer; otherwise emit to STREAM. */
1457 emit_style_escape (const ui_file_style
&style
,
1458 struct ui_file
*stream
= nullptr)
1460 applied_style
= style
;
1462 if (stream
== nullptr)
1463 wrap_buffer
.append (style
.to_ansi ());
1465 fputs_unfiltered (style
.to_ansi ().c_str (), stream
);
1471 can_emit_style_escape (struct ui_file
*stream
)
1473 if (stream
!= gdb_stdout
1475 || !ui_file_isatty (stream
))
1477 const char *term
= getenv ("TERM");
1478 if (term
== nullptr || !strcmp (term
, "dumb"))
1483 /* Set the current output style. This will affect future uses of the
1484 _filtered output functions. */
1487 set_output_style (struct ui_file
*stream
, const ui_file_style
&style
)
1489 if (!can_emit_style_escape (stream
))
1492 /* Note that we don't pass STREAM here, because we want to emit to
1493 the wrap buffer, not directly to STREAM. */
1494 emit_style_escape (style
);
1500 reset_terminal_style (struct ui_file
*stream
)
1502 if (can_emit_style_escape (stream
))
1504 /* Force the setting, regardless of what we think the setting
1505 might already be. */
1506 applied_style
= ui_file_style ();
1507 wrap_buffer
.append (applied_style
.to_ansi ());
1511 /* Wait, so the user can read what's on the screen. Prompt the user
1512 to continue by pressing RETURN. 'q' is also provided because
1513 telling users what to do in the prompt is more user-friendly than
1514 expecting them to think of Ctrl-C/SIGINT. */
1517 prompt_for_continue (void)
1519 char cont_prompt
[120];
1520 /* Used to add duration we waited for user to respond to
1521 prompt_for_continue_wait_time. */
1522 using namespace std::chrono
;
1523 steady_clock::time_point prompt_started
= steady_clock::now ();
1524 bool disable_pagination
= pagination_disabled_for_command
;
1526 /* Clear the current styling. */
1527 if (can_emit_style_escape (gdb_stdout
))
1528 emit_style_escape (ui_file_style (), gdb_stdout
);
1530 if (annotation_level
> 1)
1531 printf_unfiltered (("\n\032\032pre-prompt-for-continue\n"));
1533 strcpy (cont_prompt
,
1534 "--Type <RET> for more, q to quit, "
1535 "c to continue without paging--");
1536 if (annotation_level
> 1)
1537 strcat (cont_prompt
, "\n\032\032prompt-for-continue\n");
1539 /* We must do this *before* we call gdb_readline_wrapper, else it
1540 will eventually call us -- thinking that we're trying to print
1541 beyond the end of the screen. */
1542 reinitialize_more_filter ();
1544 scoped_input_handler prepare_input
;
1546 /* Call gdb_readline_wrapper, not readline, in order to keep an
1547 event loop running. */
1548 gdb::unique_xmalloc_ptr
<char> ignore (gdb_readline_wrapper (cont_prompt
));
1550 /* Add time spend in this routine to prompt_for_continue_wait_time. */
1551 prompt_for_continue_wait_time
+= steady_clock::now () - prompt_started
;
1553 if (annotation_level
> 1)
1554 printf_unfiltered (("\n\032\032post-prompt-for-continue\n"));
1558 char *p
= ignore
.get ();
1560 while (*p
== ' ' || *p
== '\t')
1563 /* Do not call quit here; there is no possibility of SIGINT. */
1564 throw_quit ("Quit");
1566 disable_pagination
= true;
1569 /* Now we have to do this again, so that GDB will know that it doesn't
1570 need to save the ---Type <return>--- line at the top of the screen. */
1571 reinitialize_more_filter ();
1572 pagination_disabled_for_command
= disable_pagination
;
1574 /* Restore the current styling. */
1575 if (can_emit_style_escape (gdb_stdout
))
1576 emit_style_escape (applied_style
);
1578 dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */
1581 /* Initialize timer to keep track of how long we waited for the user. */
1584 reset_prompt_for_continue_wait_time (void)
1586 using namespace std::chrono
;
1588 prompt_for_continue_wait_time
= steady_clock::duration::zero ();
1591 /* Fetch the cumulative time spent in prompt_for_continue. */
1593 std::chrono::steady_clock::duration
1594 get_prompt_for_continue_wait_time ()
1596 return prompt_for_continue_wait_time
;
1599 /* Reinitialize filter; ie. tell it to reset to original values. */
1602 reinitialize_more_filter (void)
1606 pagination_disabled_for_command
= false;
1609 /* Flush the wrap buffer to STREAM, if necessary. */
1612 flush_wrap_buffer (struct ui_file
*stream
)
1614 if (stream
== gdb_stdout
&& !wrap_buffer
.empty ())
1616 fputs_unfiltered (wrap_buffer
.c_str (), stream
);
1617 wrap_buffer
.clear ();
1621 /* Indicate that if the next sequence of characters overflows the line,
1622 a newline should be inserted here rather than when it hits the end.
1623 If INDENT is non-null, it is a string to be printed to indent the
1624 wrapped part on the next line. INDENT must remain accessible until
1625 the next call to wrap_here() or until a newline is printed through
1628 If the line is already overfull, we immediately print a newline and
1629 the indentation, and disable further wrapping.
1631 If we don't know the width of lines, but we know the page height,
1632 we must not wrap words, but should still keep track of newlines
1633 that were explicitly printed.
1635 INDENT should not contain tabs, as that will mess up the char count
1636 on the next line. FIXME.
1638 This routine is guaranteed to force out any output which has been
1639 squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be
1640 used to force out output from the wrap_buffer. */
1643 wrap_here (const char *indent
)
1645 /* This should have been allocated, but be paranoid anyway. */
1646 if (!filter_initialized
)
1647 internal_error (__FILE__
, __LINE__
,
1648 _("failed internal consistency check"));
1650 flush_wrap_buffer (gdb_stdout
);
1651 if (chars_per_line
== UINT_MAX
) /* No line overflow checking. */
1655 else if (chars_printed
>= chars_per_line
)
1657 puts_filtered ("\n");
1659 puts_filtered (indent
);
1664 wrap_column
= chars_printed
;
1668 wrap_indent
= indent
;
1669 wrap_style
= applied_style
;
1673 /* Print input string to gdb_stdout, filtered, with wrap,
1674 arranging strings in columns of n chars. String can be
1675 right or left justified in the column. Never prints
1676 trailing spaces. String should never be longer than
1677 width. FIXME: this could be useful for the EXAMINE
1678 command, which currently doesn't tabulate very well. */
1681 puts_filtered_tabular (char *string
, int width
, int right
)
1687 gdb_assert (chars_per_line
> 0);
1688 if (chars_per_line
== UINT_MAX
)
1690 fputs_filtered (string
, gdb_stdout
);
1691 fputs_filtered ("\n", gdb_stdout
);
1695 if (((chars_printed
- 1) / width
+ 2) * width
>= chars_per_line
)
1696 fputs_filtered ("\n", gdb_stdout
);
1698 if (width
>= chars_per_line
)
1699 width
= chars_per_line
- 1;
1701 stringlen
= strlen (string
);
1703 if (chars_printed
> 0)
1704 spaces
= width
- (chars_printed
- 1) % width
- 1;
1706 spaces
+= width
- stringlen
;
1708 spacebuf
= (char *) alloca (spaces
+ 1);
1709 spacebuf
[spaces
] = '\0';
1711 spacebuf
[spaces
] = ' ';
1713 fputs_filtered (spacebuf
, gdb_stdout
);
1714 fputs_filtered (string
, gdb_stdout
);
1718 /* Ensure that whatever gets printed next, using the filtered output
1719 commands, starts at the beginning of the line. I.e. if there is
1720 any pending output for the current line, flush it and start a new
1721 line. Otherwise do nothing. */
1726 if (chars_printed
> 0)
1728 puts_filtered ("\n");
1733 /* Like fputs but if FILTER is true, pause after every screenful.
1735 Regardless of FILTER can wrap at points other than the final
1736 character of a line.
1738 Unlike fputs, fputs_maybe_filtered does not return a value.
1739 It is OK for LINEBUFFER to be NULL, in which case just don't print
1742 Note that a longjmp to top level may occur in this routine (only if
1743 FILTER is true) (since prompt_for_continue may do so) so this
1744 routine should not be called when cleanups are not in place. */
1747 fputs_maybe_filtered (const char *linebuffer
, struct ui_file
*stream
,
1750 const char *lineptr
;
1752 if (linebuffer
== 0)
1755 /* Don't do any filtering if it is disabled. */
1756 if (stream
!= gdb_stdout
1757 || !pagination_enabled
1758 || pagination_disabled_for_command
1760 || (lines_per_page
== UINT_MAX
&& chars_per_line
== UINT_MAX
)
1761 || top_level_interpreter () == NULL
1762 || top_level_interpreter ()->interp_ui_out ()->is_mi_like_p ())
1764 flush_wrap_buffer (stream
);
1765 fputs_unfiltered (linebuffer
, stream
);
1770 = make_scope_exit ([&] ()
1772 wrap_buffer
.clear ();
1777 /* Go through and output each character. Show line extension
1778 when this is necessary; prompt user for new page when this is
1781 lineptr
= linebuffer
;
1784 /* Possible new page. Note that PAGINATION_DISABLED_FOR_COMMAND
1785 might be set during this loop, so we must continue to check
1787 if (filter
&& (lines_printed
>= lines_per_page
- 1)
1788 && !pagination_disabled_for_command
)
1789 prompt_for_continue ();
1791 while (*lineptr
&& *lineptr
!= '\n')
1795 /* Print a single line. */
1796 if (*lineptr
== '\t')
1798 wrap_buffer
.push_back ('\t');
1799 /* Shifting right by 3 produces the number of tab stops
1800 we have already passed, and then adding one and
1801 shifting left 3 advances to the next tab stop. */
1802 chars_printed
= ((chars_printed
>> 3) + 1) << 3;
1805 else if (*lineptr
== '\033'
1806 && skip_ansi_escape (lineptr
, &skip_bytes
))
1808 wrap_buffer
.append (lineptr
, skip_bytes
);
1809 /* Note that we don't consider this a character, so we
1810 don't increment chars_printed here. */
1811 lineptr
+= skip_bytes
;
1815 wrap_buffer
.push_back (*lineptr
);
1820 if (chars_printed
>= chars_per_line
)
1822 unsigned int save_chars
= chars_printed
;
1828 if (can_emit_style_escape (stream
))
1829 emit_style_escape (ui_file_style (), stream
);
1830 /* If we aren't actually wrapping, don't output
1831 newline -- if chars_per_line is right, we
1832 probably just overflowed anyway; if it's wrong,
1833 let us keep going. */
1834 fputc_unfiltered ('\n', stream
);
1837 flush_wrap_buffer (stream
);
1839 /* Possible new page. Note that
1840 PAGINATION_DISABLED_FOR_COMMAND might be set during
1841 this loop, so we must continue to check it here. */
1842 if (lines_printed
>= lines_per_page
- 1
1843 && !pagination_disabled_for_command
)
1844 prompt_for_continue ();
1846 /* Now output indentation and wrapped string. */
1849 fputs_unfiltered (wrap_indent
, stream
);
1850 if (can_emit_style_escape (stream
))
1851 emit_style_escape (wrap_style
, stream
);
1852 /* FIXME, this strlen is what prevents wrap_indent from
1853 containing tabs. However, if we recurse to print it
1854 and count its chars, we risk trouble if wrap_indent is
1855 longer than (the user settable) chars_per_line.
1856 Note also that this can set chars_printed > chars_per_line
1857 if we are printing a long string. */
1858 chars_printed
= strlen (wrap_indent
)
1859 + (save_chars
- wrap_column
);
1860 wrap_column
= 0; /* And disable fancy wrap */
1865 if (*lineptr
== '\n')
1868 wrap_here ((char *) 0); /* Spit out chars, cancel
1871 fputc_unfiltered ('\n', stream
);
1876 buffer_clearer
.release ();
1880 fputs_filtered (const char *linebuffer
, struct ui_file
*stream
)
1882 fputs_maybe_filtered (linebuffer
, stream
, 1);
1888 fputs_styled (const char *linebuffer
, const ui_file_style
&style
,
1889 struct ui_file
*stream
)
1891 /* This just makes it so we emit somewhat fewer escape
1893 if (style
.is_default ())
1894 fputs_maybe_filtered (linebuffer
, stream
, 1);
1897 set_output_style (stream
, style
);
1898 fputs_maybe_filtered (linebuffer
, stream
, 1);
1899 set_output_style (stream
, ui_file_style ());
1904 putchar_unfiltered (int c
)
1908 ui_file_write (gdb_stdout
, &buf
, 1);
1912 /* Write character C to gdb_stdout using GDB's paging mechanism and return C.
1913 May return nonlocally. */
1916 putchar_filtered (int c
)
1918 return fputc_filtered (c
, gdb_stdout
);
1922 fputc_unfiltered (int c
, struct ui_file
*stream
)
1926 ui_file_write (stream
, &buf
, 1);
1931 fputc_filtered (int c
, struct ui_file
*stream
)
1937 fputs_filtered (buf
, stream
);
1941 /* puts_debug is like fputs_unfiltered, except it prints special
1942 characters in printable fashion. */
1945 puts_debug (char *prefix
, char *string
, char *suffix
)
1949 /* Print prefix and suffix after each line. */
1950 static int new_line
= 1;
1951 static int return_p
= 0;
1952 static const char *prev_prefix
= "";
1953 static const char *prev_suffix
= "";
1955 if (*string
== '\n')
1958 /* If the prefix is changing, print the previous suffix, a new line,
1959 and the new prefix. */
1960 if ((return_p
|| (strcmp (prev_prefix
, prefix
) != 0)) && !new_line
)
1962 fputs_unfiltered (prev_suffix
, gdb_stdlog
);
1963 fputs_unfiltered ("\n", gdb_stdlog
);
1964 fputs_unfiltered (prefix
, gdb_stdlog
);
1967 /* Print prefix if we printed a newline during the previous call. */
1971 fputs_unfiltered (prefix
, gdb_stdlog
);
1974 prev_prefix
= prefix
;
1975 prev_suffix
= suffix
;
1977 /* Output characters in a printable format. */
1978 while ((ch
= *string
++) != '\0')
1984 fputc_unfiltered (ch
, gdb_stdlog
);
1987 fprintf_unfiltered (gdb_stdlog
, "\\x%02x", ch
& 0xff);
1991 fputs_unfiltered ("\\\\", gdb_stdlog
);
1994 fputs_unfiltered ("\\b", gdb_stdlog
);
1997 fputs_unfiltered ("\\f", gdb_stdlog
);
2001 fputs_unfiltered ("\\n", gdb_stdlog
);
2004 fputs_unfiltered ("\\r", gdb_stdlog
);
2007 fputs_unfiltered ("\\t", gdb_stdlog
);
2010 fputs_unfiltered ("\\v", gdb_stdlog
);
2014 return_p
= ch
== '\r';
2017 /* Print suffix if we printed a newline. */
2020 fputs_unfiltered (suffix
, gdb_stdlog
);
2021 fputs_unfiltered ("\n", gdb_stdlog
);
2026 /* Print a variable number of ARGS using format FORMAT. If this
2027 information is going to put the amount written (since the last call
2028 to REINITIALIZE_MORE_FILTER or the last page break) over the page size,
2029 call prompt_for_continue to get the users permision to continue.
2031 Unlike fprintf, this function does not return a value.
2033 We implement three variants, vfprintf (takes a vararg list and stream),
2034 fprintf (takes a stream to write on), and printf (the usual).
2036 Note also that a longjmp to top level may occur in this routine
2037 (since prompt_for_continue may do so) so this routine should not be
2038 called when cleanups are not in place. */
2041 vfprintf_maybe_filtered (struct ui_file
*stream
, const char *format
,
2042 va_list args
, int filter
)
2044 std::string linebuffer
= string_vprintf (format
, args
);
2045 fputs_maybe_filtered (linebuffer
.c_str (), stream
, filter
);
2050 vfprintf_filtered (struct ui_file
*stream
, const char *format
, va_list args
)
2052 vfprintf_maybe_filtered (stream
, format
, args
, 1);
2056 vfprintf_unfiltered (struct ui_file
*stream
, const char *format
, va_list args
)
2058 std::string linebuffer
= string_vprintf (format
, args
);
2059 if (debug_timestamp
&& stream
== gdb_stdlog
)
2061 using namespace std::chrono
;
2064 steady_clock::time_point now
= steady_clock::now ();
2065 seconds s
= duration_cast
<seconds
> (now
.time_since_epoch ());
2066 microseconds us
= duration_cast
<microseconds
> (now
.time_since_epoch () - s
);
2068 len
= linebuffer
.size ();
2069 need_nl
= (len
> 0 && linebuffer
[len
- 1] != '\n');
2071 std::string timestamp
= string_printf ("%ld.%06ld %s%s",
2074 linebuffer
.c_str (),
2075 need_nl
? "\n": "");
2076 fputs_unfiltered (timestamp
.c_str (), stream
);
2079 fputs_unfiltered (linebuffer
.c_str (), stream
);
2083 vprintf_filtered (const char *format
, va_list args
)
2085 vfprintf_maybe_filtered (gdb_stdout
, format
, args
, 1);
2089 vprintf_unfiltered (const char *format
, va_list args
)
2091 vfprintf_unfiltered (gdb_stdout
, format
, args
);
2095 fprintf_filtered (struct ui_file
*stream
, const char *format
, ...)
2099 va_start (args
, format
);
2100 vfprintf_filtered (stream
, format
, args
);
2105 fprintf_unfiltered (struct ui_file
*stream
, const char *format
, ...)
2109 va_start (args
, format
);
2110 vfprintf_unfiltered (stream
, format
, args
);
2114 /* Like fprintf_filtered, but prints its result indented.
2115 Called as fprintfi_filtered (spaces, stream, format, ...); */
2118 fprintfi_filtered (int spaces
, struct ui_file
*stream
, const char *format
,
2123 va_start (args
, format
);
2124 print_spaces_filtered (spaces
, stream
);
2126 vfprintf_filtered (stream
, format
, args
);
2133 fprintf_styled (struct ui_file
*stream
, const ui_file_style
&style
,
2134 const char *format
, ...)
2138 set_output_style (stream
, style
);
2139 va_start (args
, format
);
2140 vfprintf_filtered (stream
, format
, args
);
2142 set_output_style (stream
, ui_file_style ());
2147 printf_filtered (const char *format
, ...)
2151 va_start (args
, format
);
2152 vfprintf_filtered (gdb_stdout
, format
, args
);
2158 printf_unfiltered (const char *format
, ...)
2162 va_start (args
, format
);
2163 vfprintf_unfiltered (gdb_stdout
, format
, args
);
2167 /* Like printf_filtered, but prints it's result indented.
2168 Called as printfi_filtered (spaces, format, ...); */
2171 printfi_filtered (int spaces
, const char *format
, ...)
2175 va_start (args
, format
);
2176 print_spaces_filtered (spaces
, gdb_stdout
);
2177 vfprintf_filtered (gdb_stdout
, format
, args
);
2181 /* Easy -- but watch out!
2183 This routine is *not* a replacement for puts()! puts() appends a newline.
2184 This one doesn't, and had better not! */
2187 puts_filtered (const char *string
)
2189 fputs_filtered (string
, gdb_stdout
);
2193 puts_unfiltered (const char *string
)
2195 fputs_unfiltered (string
, gdb_stdout
);
2198 /* Return a pointer to N spaces and a null. The pointer is good
2199 until the next call to here. */
2204 static char *spaces
= 0;
2205 static int max_spaces
= -1;
2211 spaces
= (char *) xmalloc (n
+ 1);
2212 for (t
= spaces
+ n
; t
!= spaces
;)
2218 return spaces
+ max_spaces
- n
;
2221 /* Print N spaces. */
2223 print_spaces_filtered (int n
, struct ui_file
*stream
)
2225 fputs_filtered (n_spaces (n
), stream
);
2228 /* C++/ObjC demangler stuff. */
2230 /* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language
2231 LANG, using demangling args ARG_MODE, and print it filtered to STREAM.
2232 If the name is not mangled, or the language for the name is unknown, or
2233 demangling is off, the name is printed in its "raw" form. */
2236 fprintf_symbol_filtered (struct ui_file
*stream
, const char *name
,
2237 enum language lang
, int arg_mode
)
2243 /* If user wants to see raw output, no problem. */
2246 fputs_filtered (name
, stream
);
2250 demangled
= language_demangle (language_def (lang
), name
, arg_mode
);
2251 fputs_filtered (demangled
? demangled
: name
, stream
);
2252 if (demangled
!= NULL
)
2260 /* True if CH is a character that can be part of a symbol name. I.e.,
2261 either a number, a letter, or a '_'. */
2264 valid_identifier_name_char (int ch
)
2266 return (isalnum (ch
) || ch
== '_');
2269 /* Skip to end of token, or to END, whatever comes first. Input is
2270 assumed to be a C++ operator name. */
2273 cp_skip_operator_token (const char *token
, const char *end
)
2275 const char *p
= token
;
2276 while (p
!= end
&& !isspace (*p
) && *p
!= '(')
2278 if (valid_identifier_name_char (*p
))
2280 while (p
!= end
&& valid_identifier_name_char (*p
))
2286 /* Note, ordered such that among ops that share a prefix,
2287 longer comes first. This is so that the loop below can
2288 bail on first match. */
2289 static const char *ops
[] =
2295 "-=", "--", "->", "-",
2304 "<<=", "<=", "<<", "<",
2305 ">>=", ">=", ">>", ">",
2309 for (const char *op
: ops
)
2311 size_t oplen
= strlen (op
);
2312 size_t lencmp
= std::min
<size_t> (oplen
, end
- p
);
2314 if (strncmp (p
, op
, lencmp
) == 0)
2317 /* Some unidentified character. Return it. */
2325 /* Advance STRING1/STRING2 past whitespace. */
2328 skip_ws (const char *&string1
, const char *&string2
, const char *end_str2
)
2330 while (isspace (*string1
))
2332 while (string2
< end_str2
&& isspace (*string2
))
2336 /* True if STRING points at the start of a C++ operator name. START
2337 is the start of the string that STRING points to, hence when
2338 reading backwards, we must not read any character before START. */
2341 cp_is_operator (const char *string
, const char *start
)
2343 return ((string
== start
2344 || !valid_identifier_name_char (string
[-1]))
2345 && strncmp (string
, CP_OPERATOR_STR
, CP_OPERATOR_LEN
) == 0
2346 && !valid_identifier_name_char (string
[CP_OPERATOR_LEN
]));
2349 /* If *NAME points at an ABI tag, skip it and return true. Otherwise
2350 leave *NAME unmodified and return false. (see GCC's abi_tag
2351 attribute), such names are demangled as e.g.,
2352 "function[abi:cxx11]()". */
2355 skip_abi_tag (const char **name
)
2357 const char *p
= *name
;
2359 if (startswith (p
, "[abi:"))
2363 while (valid_identifier_name_char (*p
))
2379 strncmp_iw_with_mode (const char *string1
, const char *string2
,
2380 size_t string2_len
, strncmp_iw_mode mode
,
2381 enum language language
,
2382 completion_match_for_lcd
*match_for_lcd
)
2384 const char *string1_start
= string1
;
2385 const char *end_str2
= string2
+ string2_len
;
2386 bool skip_spaces
= true;
2387 bool have_colon_op
= (language
== language_cplus
2388 || language
== language_rust
2389 || language
== language_fortran
);
2394 || ((isspace (*string1
) && !valid_identifier_name_char (*string2
))
2395 || (isspace (*string2
) && !valid_identifier_name_char (*string1
))))
2397 skip_ws (string1
, string2
, end_str2
);
2398 skip_spaces
= false;
2401 /* Skip [abi:cxx11] tags in the symbol name if the lookup name
2402 doesn't include them. E.g.:
2404 string1: function[abi:cxx1](int)
2407 string1: function[abi:cxx1](int)
2408 string2: function(int)
2410 string1: Struct[abi:cxx1]::function()
2411 string2: Struct::function()
2413 string1: function(Struct[abi:cxx1], int)
2414 string2: function(Struct, int)
2416 if (string2
== end_str2
2417 || (*string2
!= '[' && !valid_identifier_name_char (*string2
)))
2419 const char *abi_start
= string1
;
2421 /* There can be more than one tag. */
2422 while (*string1
== '[' && skip_abi_tag (&string1
))
2425 if (match_for_lcd
!= NULL
&& abi_start
!= string1
)
2426 match_for_lcd
->mark_ignored_range (abi_start
, string1
);
2428 while (isspace (*string1
))
2432 if (*string1
== '\0' || string2
== end_str2
)
2435 /* Handle the :: operator. */
2436 if (have_colon_op
&& string1
[0] == ':' && string1
[1] == ':')
2438 if (*string2
!= ':')
2444 if (string2
== end_str2
)
2447 if (*string2
!= ':')
2453 while (isspace (*string1
))
2455 while (string2
< end_str2
&& isspace (*string2
))
2460 /* Handle C++ user-defined operators. */
2461 else if (language
== language_cplus
2464 if (cp_is_operator (string1
, string1_start
))
2466 /* An operator name in STRING1. Check STRING2. */
2468 = std::min
<size_t> (CP_OPERATOR_LEN
, end_str2
- string2
);
2469 if (strncmp (string1
, string2
, cmplen
) != 0)
2475 if (string2
!= end_str2
)
2477 /* Check for "operatorX" in STRING2. */
2478 if (valid_identifier_name_char (*string2
))
2481 skip_ws (string1
, string2
, end_str2
);
2484 /* Handle operator(). */
2485 if (*string1
== '(')
2487 if (string2
== end_str2
)
2489 if (mode
== strncmp_iw_mode::NORMAL
)
2493 /* Don't break for the regular return at the
2494 bottom, because "operator" should not
2495 match "operator()", since this open
2496 parentheses is not the parameter list
2498 return *string1
!= '\0';
2502 if (*string1
!= *string2
)
2511 skip_ws (string1
, string2
, end_str2
);
2513 /* Skip to end of token, or to END, whatever comes
2515 const char *end_str1
= string1
+ strlen (string1
);
2516 const char *p1
= cp_skip_operator_token (string1
, end_str1
);
2517 const char *p2
= cp_skip_operator_token (string2
, end_str2
);
2519 cmplen
= std::min (p1
- string1
, p2
- string2
);
2522 if (strncmp (string1
, string2
, cmplen
) != 0)
2527 if (p1
- string1
!= p2
- string2
)
2529 if (strncmp (string1
, string2
, cmplen
) != 0)
2536 if (*string1
== '\0' || string2
== end_str2
)
2538 if (*string1
== '(' || *string2
== '(')
2546 if (case_sensitivity
== case_sensitive_on
&& *string1
!= *string2
)
2548 if (case_sensitivity
== case_sensitive_off
2549 && (tolower ((unsigned char) *string1
)
2550 != tolower ((unsigned char) *string2
)))
2553 /* If we see any non-whitespace, non-identifier-name character
2554 (any of "()<>*&" etc.), then skip spaces the next time
2556 if (!isspace (*string1
) && !valid_identifier_name_char (*string1
))
2563 if (string2
== end_str2
)
2565 if (mode
== strncmp_iw_mode::NORMAL
)
2567 /* Strip abi tag markers from the matched symbol name.
2568 Usually the ABI marker will be found on function name
2569 (automatically added because the function returns an
2570 object marked with an ABI tag). However, it's also
2571 possible to see a marker in one of the function
2572 parameters, for example.
2574 string2 (lookup name):
2577 function(some_struct[abi:cxx11], int)
2579 and for completion LCD computation we want to say that
2581 function(some_struct, int)
2583 if (match_for_lcd
!= NULL
)
2585 while ((string1
= strstr (string1
, "[abi:")) != NULL
)
2587 const char *abi_start
= string1
;
2589 /* There can be more than one tag. */
2590 while (skip_abi_tag (&string1
) && *string1
== '[')
2593 if (abi_start
!= string1
)
2594 match_for_lcd
->mark_ignored_range (abi_start
, string1
);
2601 return (*string1
!= '\0' && *string1
!= '(');
2610 strncmp_iw (const char *string1
, const char *string2
, size_t string2_len
)
2612 return strncmp_iw_with_mode (string1
, string2
, string2_len
,
2613 strncmp_iw_mode::NORMAL
, language_minimal
);
2619 strcmp_iw (const char *string1
, const char *string2
)
2621 return strncmp_iw_with_mode (string1
, string2
, strlen (string2
),
2622 strncmp_iw_mode::MATCH_PARAMS
, language_minimal
);
2625 /* This is like strcmp except that it ignores whitespace and treats
2626 '(' as the first non-NULL character in terms of ordering. Like
2627 strcmp (and unlike strcmp_iw), it returns negative if STRING1 <
2628 STRING2, 0 if STRING2 = STRING2, and positive if STRING1 > STRING2
2629 according to that ordering.
2631 If a list is sorted according to this function and if you want to
2632 find names in the list that match some fixed NAME according to
2633 strcmp_iw(LIST_ELT, NAME), then the place to start looking is right
2634 where this function would put NAME.
2636 This function must be neutral to the CASE_SENSITIVITY setting as the user
2637 may choose it during later lookup. Therefore this function always sorts
2638 primarily case-insensitively and secondarily case-sensitively.
2640 Here are some examples of why using strcmp to sort is a bad idea:
2644 Say your partial symtab contains: "foo<char *>", "goo". Then, if
2645 we try to do a search for "foo<char*>", strcmp will locate this
2646 after "foo<char *>" and before "goo". Then lookup_partial_symbol
2647 will start looking at strings beginning with "goo", and will never
2648 see the correct match of "foo<char *>".
2650 Parenthesis example:
2652 In practice, this is less like to be an issue, but I'll give it a
2653 shot. Let's assume that '$' is a legitimate character to occur in
2654 symbols. (Which may well even be the case on some systems.) Then
2655 say that the partial symbol table contains "foo$" and "foo(int)".
2656 strcmp will put them in this order, since '$' < '('. Now, if the
2657 user searches for "foo", then strcmp will sort "foo" before "foo$".
2658 Then lookup_partial_symbol will notice that strcmp_iw("foo$",
2659 "foo") is false, so it won't proceed to the actual match of
2660 "foo(int)" with "foo". */
2663 strcmp_iw_ordered (const char *string1
, const char *string2
)
2665 const char *saved_string1
= string1
, *saved_string2
= string2
;
2666 enum case_sensitivity case_pass
= case_sensitive_off
;
2670 /* C1 and C2 are valid only if *string1 != '\0' && *string2 != '\0'.
2671 Provide stub characters if we are already at the end of one of the
2673 char c1
= 'X', c2
= 'X';
2675 while (*string1
!= '\0' && *string2
!= '\0')
2677 while (isspace (*string1
))
2679 while (isspace (*string2
))
2684 case case_sensitive_off
:
2685 c1
= tolower ((unsigned char) *string1
);
2686 c2
= tolower ((unsigned char) *string2
);
2688 case case_sensitive_on
:
2696 if (*string1
!= '\0')
2705 /* Characters are non-equal unless they're both '\0'; we want to
2706 make sure we get the comparison right according to our
2707 comparison in the cases where one of them is '\0' or '('. */
2709 if (*string2
== '\0')
2714 if (*string2
== '\0')
2719 if (*string2
== '\0' || *string2
== '(')
2728 if (case_pass
== case_sensitive_on
)
2731 /* Otherwise the strings were equal in case insensitive way, make
2732 a more fine grained comparison in a case sensitive way. */
2734 case_pass
= case_sensitive_on
;
2735 string1
= saved_string1
;
2736 string2
= saved_string2
;
2743 streq (const char *lhs
, const char *rhs
)
2745 return !strcmp (lhs
, rhs
);
2751 streq_hash (const void *lhs
, const void *rhs
)
2753 return streq ((const char *) lhs
, (const char *) rhs
);
2760 ** Answer whether string_to_compare is a full or partial match to
2761 ** template_string. The partial match must be in sequence starting
2765 subset_compare (const char *string_to_compare
, const char *template_string
)
2769 if (template_string
!= (char *) NULL
&& string_to_compare
!= (char *) NULL
2770 && strlen (string_to_compare
) <= strlen (template_string
))
2772 (startswith (template_string
, string_to_compare
));
2779 show_debug_timestamp (struct ui_file
*file
, int from_tty
,
2780 struct cmd_list_element
*c
, const char *value
)
2782 fprintf_filtered (file
, _("Timestamping debugging messages is %s.\n"),
2788 initialize_utils (void)
2790 add_setshow_uinteger_cmd ("width", class_support
, &chars_per_line
, _("\
2791 Set number of characters where GDB should wrap lines of its output."), _("\
2792 Show number of characters where GDB should wrap lines of its output."), _("\
2793 This affects where GDB wraps its output to fit the screen width.\n\
2794 Setting this to \"unlimited\" or zero prevents GDB from wrapping its output."),
2796 show_chars_per_line
,
2797 &setlist
, &showlist
);
2799 add_setshow_uinteger_cmd ("height", class_support
, &lines_per_page
, _("\
2800 Set number of lines in a page for GDB output pagination."), _("\
2801 Show number of lines in a page for GDB output pagination."), _("\
2802 This affects the number of lines after which GDB will pause\n\
2803 its output and ask you whether to continue.\n\
2804 Setting this to \"unlimited\" or zero causes GDB never pause during output."),
2806 show_lines_per_page
,
2807 &setlist
, &showlist
);
2809 add_setshow_boolean_cmd ("pagination", class_support
,
2810 &pagination_enabled
, _("\
2811 Set state of GDB output pagination."), _("\
2812 Show state of GDB output pagination."), _("\
2813 When pagination is ON, GDB pauses at end of each screenful of\n\
2814 its output and asks you whether to continue.\n\
2815 Turning pagination off is an alternative to \"set height unlimited\"."),
2817 show_pagination_enabled
,
2818 &setlist
, &showlist
);
2820 add_setshow_boolean_cmd ("sevenbit-strings", class_support
,
2821 &sevenbit_strings
, _("\
2822 Set printing of 8-bit characters in strings as \\nnn."), _("\
2823 Show printing of 8-bit characters in strings as \\nnn."), NULL
,
2825 show_sevenbit_strings
,
2826 &setprintlist
, &showprintlist
);
2828 add_setshow_boolean_cmd ("timestamp", class_maintenance
,
2829 &debug_timestamp
, _("\
2830 Set timestamping of debugging messages."), _("\
2831 Show timestamping of debugging messages."), _("\
2832 When set, debugging messages will be marked with seconds and microseconds."),
2834 show_debug_timestamp
,
2835 &setdebuglist
, &showdebuglist
);
2841 address_significant (gdbarch
*gdbarch
, CORE_ADDR addr
)
2843 /* Clear insignificant bits of a target address and sign extend resulting
2844 address, avoiding shifts larger or equal than the width of a CORE_ADDR.
2845 The local variable ADDR_BIT stops the compiler reporting a shift overflow
2846 when it won't occur. Skip updating of target address if current target
2847 has not set gdbarch significant_addr_bit. */
2848 int addr_bit
= gdbarch_significant_addr_bit (gdbarch
);
2850 if (addr_bit
&& (addr_bit
< (sizeof (CORE_ADDR
) * HOST_CHAR_BIT
)))
2852 CORE_ADDR sign
= (CORE_ADDR
) 1 << (addr_bit
- 1);
2853 addr
&= ((CORE_ADDR
) 1 << addr_bit
) - 1;
2854 addr
= (addr
^ sign
) - sign
;
2861 paddress (struct gdbarch
*gdbarch
, CORE_ADDR addr
)
2863 /* Truncate address to the size of a target address, avoiding shifts
2864 larger or equal than the width of a CORE_ADDR. The local
2865 variable ADDR_BIT stops the compiler reporting a shift overflow
2866 when it won't occur. */
2867 /* NOTE: This assumes that the significant address information is
2868 kept in the least significant bits of ADDR - the upper bits were
2869 either zero or sign extended. Should gdbarch_address_to_pointer or
2870 some ADDRESS_TO_PRINTABLE() be used to do the conversion? */
2872 int addr_bit
= gdbarch_addr_bit (gdbarch
);
2874 if (addr_bit
< (sizeof (CORE_ADDR
) * HOST_CHAR_BIT
))
2875 addr
&= ((CORE_ADDR
) 1 << addr_bit
) - 1;
2876 return hex_string (addr
);
2879 /* This function is described in "defs.h". */
2882 print_core_address (struct gdbarch
*gdbarch
, CORE_ADDR address
)
2884 int addr_bit
= gdbarch_addr_bit (gdbarch
);
2886 if (addr_bit
< (sizeof (CORE_ADDR
) * HOST_CHAR_BIT
))
2887 address
&= ((CORE_ADDR
) 1 << addr_bit
) - 1;
2889 /* FIXME: cagney/2002-05-03: Need local_address_string() function
2890 that returns the language localized string formatted to a width
2891 based on gdbarch_addr_bit. */
2893 return hex_string_custom (address
, 8);
2895 return hex_string_custom (address
, 16);
2898 /* Callback hash_f for htab_create_alloc or htab_create_alloc_ex. */
2901 core_addr_hash (const void *ap
)
2903 const CORE_ADDR
*addrp
= (const CORE_ADDR
*) ap
;
2908 /* Callback eq_f for htab_create_alloc or htab_create_alloc_ex. */
2911 core_addr_eq (const void *ap
, const void *bp
)
2913 const CORE_ADDR
*addr_ap
= (const CORE_ADDR
*) ap
;
2914 const CORE_ADDR
*addr_bp
= (const CORE_ADDR
*) bp
;
2916 return *addr_ap
== *addr_bp
;
2919 /* Convert a string back into a CORE_ADDR. */
2921 string_to_core_addr (const char *my_string
)
2925 if (my_string
[0] == '0' && tolower (my_string
[1]) == 'x')
2927 /* Assume that it is in hex. */
2930 for (i
= 2; my_string
[i
] != '\0'; i
++)
2932 if (isdigit (my_string
[i
]))
2933 addr
= (my_string
[i
] - '0') + (addr
* 16);
2934 else if (isxdigit (my_string
[i
]))
2935 addr
= (tolower (my_string
[i
]) - 'a' + 0xa) + (addr
* 16);
2937 error (_("invalid hex \"%s\""), my_string
);
2942 /* Assume that it is in decimal. */
2945 for (i
= 0; my_string
[i
] != '\0'; i
++)
2947 if (isdigit (my_string
[i
]))
2948 addr
= (my_string
[i
] - '0') + (addr
* 10);
2950 error (_("invalid decimal \"%s\""), my_string
);
2960 gdb_realpath_check_trailer (const char *input
, const char *trailer
)
2962 gdb::unique_xmalloc_ptr
<char> result
= gdb_realpath (input
);
2964 size_t len
= strlen (result
.get ());
2965 size_t trail_len
= strlen (trailer
);
2967 SELF_CHECK (len
>= trail_len
2968 && strcmp (result
.get () + len
- trail_len
, trailer
) == 0);
2972 gdb_realpath_tests ()
2974 /* A file which contains a directory prefix. */
2975 gdb_realpath_check_trailer ("./xfullpath.exp", "/xfullpath.exp");
2976 /* A file which contains a directory prefix. */
2977 gdb_realpath_check_trailer ("../../defs.h", "/defs.h");
2978 /* A one-character filename. */
2979 gdb_realpath_check_trailer ("./a", "/a");
2980 /* A file in the root directory. */
2981 gdb_realpath_check_trailer ("/root_file_which_should_exist",
2982 "/root_file_which_should_exist");
2983 /* A file which does not have a directory prefix. */
2984 gdb_realpath_check_trailer ("xfullpath.exp", "xfullpath.exp");
2985 /* A one-char filename without any directory prefix. */
2986 gdb_realpath_check_trailer ("a", "a");
2987 /* An empty filename. */
2988 gdb_realpath_check_trailer ("", "");
2991 #endif /* GDB_SELF_TEST */
2993 /* Allocation function for the libiberty hash table which uses an
2994 obstack. The obstack is passed as DATA. */
2997 hashtab_obstack_allocate (void *data
, size_t size
, size_t count
)
2999 size_t total
= size
* count
;
3000 void *ptr
= obstack_alloc ((struct obstack
*) data
, total
);
3002 memset (ptr
, 0, total
);
3006 /* Trivial deallocation function for the libiberty splay tree and hash
3007 table - don't deallocate anything. Rely on later deletion of the
3008 obstack. DATA will be the obstack, although it is not needed
3012 dummy_obstack_deallocate (void *object
, void *data
)
3017 /* Simple, portable version of dirname that does not modify its
3021 ldirname (const char *filename
)
3023 std::string dirname
;
3024 const char *base
= lbasename (filename
);
3026 while (base
> filename
&& IS_DIR_SEPARATOR (base
[-1]))
3029 if (base
== filename
)
3032 dirname
= std::string (filename
, base
- filename
);
3034 /* On DOS based file systems, convert "d:foo" to "d:.", so that we
3035 create "d:./bar" later instead of the (different) "d:/bar". */
3036 if (base
- filename
== 2 && IS_ABSOLUTE_PATH (base
)
3037 && !IS_DIR_SEPARATOR (filename
[0]))
3038 dirname
[base
++ - filename
] = '.';
3046 gdb_argv::reset (const char *s
)
3048 char **argv
= buildargv (s
);
3050 if (s
!= NULL
&& argv
== NULL
)
3058 compare_positive_ints (const void *ap
, const void *bp
)
3060 /* Because we know we're comparing two ints which are positive,
3061 there's no danger of overflow here. */
3062 return * (int *) ap
- * (int *) bp
;
3065 #define AMBIGUOUS_MESS1 ".\nMatching formats:"
3066 #define AMBIGUOUS_MESS2 \
3067 ".\nUse \"set gnutarget format-name\" to specify the format."
3070 gdb_bfd_errmsg (bfd_error_type error_tag
, char **matching
)
3074 /* Check if errmsg just need simple return. */
3075 if (error_tag
!= bfd_error_file_ambiguously_recognized
|| matching
== NULL
)
3076 return bfd_errmsg (error_tag
);
3078 std::string
ret (bfd_errmsg (error_tag
));
3079 ret
+= AMBIGUOUS_MESS1
;
3081 for (p
= matching
; *p
; p
++)
3086 ret
+= AMBIGUOUS_MESS2
;
3093 /* Return ARGS parsed as a valid pid, or throw an error. */
3096 parse_pid_to_attach (const char *args
)
3102 error_no_arg (_("process-id to attach"));
3104 dummy
= (char *) args
;
3105 pid
= strtoul (args
, &dummy
, 0);
3106 /* Some targets don't set errno on errors, grrr! */
3107 if ((pid
== 0 && dummy
== args
) || dummy
!= &args
[strlen (args
)])
3108 error (_("Illegal process-id: %s."), args
);
3113 /* Substitute all occurences of string FROM by string TO in *STRINGP. *STRINGP
3114 must come from xrealloc-compatible allocator and it may be updated. FROM
3115 needs to be delimited by IS_DIR_SEPARATOR or DIRNAME_SEPARATOR (or be
3116 located at the start or end of *STRINGP. */
3119 substitute_path_component (char **stringp
, const char *from
, const char *to
)
3121 char *string
= *stringp
, *s
;
3122 const size_t from_len
= strlen (from
);
3123 const size_t to_len
= strlen (to
);
3127 s
= strstr (s
, from
);
3131 if ((s
== string
|| IS_DIR_SEPARATOR (s
[-1])
3132 || s
[-1] == DIRNAME_SEPARATOR
)
3133 && (s
[from_len
] == '\0' || IS_DIR_SEPARATOR (s
[from_len
])
3134 || s
[from_len
] == DIRNAME_SEPARATOR
))
3139 = (char *) xrealloc (string
, (strlen (string
) + to_len
+ 1));
3141 /* Relocate the current S pointer. */
3142 s
= s
- string
+ string_new
;
3143 string
= string_new
;
3145 /* Replace from by to. */
3146 memmove (&s
[to_len
], &s
[from_len
], strlen (&s
[from_len
]) + 1);
3147 memcpy (s
, to
, to_len
);
3162 /* SIGALRM handler for waitpid_with_timeout. */
3165 sigalrm_handler (int signo
)
3167 /* Nothing to do. */
3172 /* Wrapper to wait for child PID to die with TIMEOUT.
3173 TIMEOUT is the time to stop waiting in seconds.
3174 If TIMEOUT is zero, pass WNOHANG to waitpid.
3175 Returns PID if it was successfully waited for, otherwise -1.
3177 Timeouts are currently implemented with alarm and SIGALRM.
3178 If the host does not support them, this waits "forever".
3179 It would be odd though for a host to have waitpid and not SIGALRM. */
3182 wait_to_die_with_timeout (pid_t pid
, int *status
, int timeout
)
3184 pid_t waitpid_result
;
3186 gdb_assert (pid
> 0);
3187 gdb_assert (timeout
>= 0);
3192 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
3193 struct sigaction sa
, old_sa
;
3195 sa
.sa_handler
= sigalrm_handler
;
3196 sigemptyset (&sa
.sa_mask
);
3198 sigaction (SIGALRM
, &sa
, &old_sa
);
3202 ofunc
= signal (SIGALRM
, sigalrm_handler
);
3208 waitpid_result
= waitpid (pid
, status
, 0);
3212 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
3213 sigaction (SIGALRM
, &old_sa
, NULL
);
3215 signal (SIGALRM
, ofunc
);
3220 waitpid_result
= waitpid (pid
, status
, WNOHANG
);
3222 if (waitpid_result
== pid
)
3228 #endif /* HAVE_WAITPID */
3230 /* Provide fnmatch compatible function for FNM_FILE_NAME matching of host files.
3231 Both FNM_FILE_NAME and FNM_NOESCAPE must be set in FLAGS.
3233 It handles correctly HAVE_DOS_BASED_FILE_SYSTEM and
3234 HAVE_CASE_INSENSITIVE_FILE_SYSTEM. */
3237 gdb_filename_fnmatch (const char *pattern
, const char *string
, int flags
)
3239 gdb_assert ((flags
& FNM_FILE_NAME
) != 0);
3241 /* It is unclear how '\' escaping vs. directory separator should coexist. */
3242 gdb_assert ((flags
& FNM_NOESCAPE
) != 0);
3244 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
3246 char *pattern_slash
, *string_slash
;
3248 /* Replace '\' by '/' in both strings. */
3250 pattern_slash
= (char *) alloca (strlen (pattern
) + 1);
3251 strcpy (pattern_slash
, pattern
);
3252 pattern
= pattern_slash
;
3253 for (; *pattern_slash
!= 0; pattern_slash
++)
3254 if (IS_DIR_SEPARATOR (*pattern_slash
))
3255 *pattern_slash
= '/';
3257 string_slash
= (char *) alloca (strlen (string
) + 1);
3258 strcpy (string_slash
, string
);
3259 string
= string_slash
;
3260 for (; *string_slash
!= 0; string_slash
++)
3261 if (IS_DIR_SEPARATOR (*string_slash
))
3262 *string_slash
= '/';
3264 #endif /* HAVE_DOS_BASED_FILE_SYSTEM */
3266 #ifdef HAVE_CASE_INSENSITIVE_FILE_SYSTEM
3267 flags
|= FNM_CASEFOLD
;
3268 #endif /* HAVE_CASE_INSENSITIVE_FILE_SYSTEM */
3270 return fnmatch (pattern
, string
, flags
);
3273 /* Return the number of path elements in PATH.
3281 count_path_elements (const char *path
)
3284 const char *p
= path
;
3286 if (HAS_DRIVE_SPEC (p
))
3288 p
= STRIP_DRIVE_SPEC (p
);
3294 if (IS_DIR_SEPARATOR (*p
))
3299 /* Backup one if last character is /, unless it's the only one. */
3300 if (p
> path
+ 1 && IS_DIR_SEPARATOR (p
[-1]))
3303 /* Add one for the file name, if present. */
3304 if (p
> path
&& !IS_DIR_SEPARATOR (p
[-1]))
3310 /* Remove N leading path elements from PATH.
3311 N must be non-negative.
3312 If PATH has more than N path elements then return NULL.
3313 If PATH has exactly N path elements then return "".
3314 See count_path_elements for a description of how we do the counting. */
3317 strip_leading_path_elements (const char *path
, int n
)
3320 const char *p
= path
;
3322 gdb_assert (n
>= 0);
3327 if (HAS_DRIVE_SPEC (p
))
3329 p
= STRIP_DRIVE_SPEC (p
);
3335 while (*p
!= '\0' && !IS_DIR_SEPARATOR (*p
))
3353 copy_bitwise (gdb_byte
*dest
, ULONGEST dest_offset
,
3354 const gdb_byte
*source
, ULONGEST source_offset
,
3355 ULONGEST nbits
, int bits_big_endian
)
3357 unsigned int buf
, avail
;
3362 if (bits_big_endian
)
3364 /* Start from the end, then work backwards. */
3365 dest_offset
+= nbits
- 1;
3366 dest
+= dest_offset
/ 8;
3367 dest_offset
= 7 - dest_offset
% 8;
3368 source_offset
+= nbits
- 1;
3369 source
+= source_offset
/ 8;
3370 source_offset
= 7 - source_offset
% 8;
3374 dest
+= dest_offset
/ 8;
3376 source
+= source_offset
/ 8;
3380 /* Fill BUF with DEST_OFFSET bits from the destination and 8 -
3381 SOURCE_OFFSET bits from the source. */
3382 buf
= *(bits_big_endian
? source
-- : source
++) >> source_offset
;
3383 buf
<<= dest_offset
;
3384 buf
|= *dest
& ((1 << dest_offset
) - 1);
3386 /* NBITS: bits yet to be written; AVAIL: BUF's fill level. */
3387 nbits
+= dest_offset
;
3388 avail
= dest_offset
+ 8 - source_offset
;
3390 /* Flush 8 bits from BUF, if appropriate. */
3391 if (nbits
>= 8 && avail
>= 8)
3393 *(bits_big_endian
? dest
-- : dest
++) = buf
;
3399 /* Copy the middle part. */
3402 size_t len
= nbits
/ 8;
3404 /* Use a faster method for byte-aligned copies. */
3407 if (bits_big_endian
)
3411 memcpy (dest
+ 1, source
+ 1, len
);
3415 memcpy (dest
, source
, len
);
3424 buf
|= *(bits_big_endian
? source
-- : source
++) << avail
;
3425 *(bits_big_endian
? dest
-- : dest
++) = buf
;
3432 /* Write the last byte. */
3436 buf
|= *source
<< avail
;
3438 buf
&= (1 << nbits
) - 1;
3439 *dest
= (*dest
& (~0 << nbits
)) | buf
;
3444 _initialize_utils (void)
3446 add_internal_problem_command (&internal_error_problem
);
3447 add_internal_problem_command (&internal_warning_problem
);
3448 add_internal_problem_command (&demangler_warning_problem
);
3451 selftests::register_test ("gdb_realpath", gdb_realpath_tests
);