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
);
132 /* Print a warning message. The first argument STRING is the warning
133 message, used as an fprintf format string, the second is the
134 va_list of arguments for that string. A warning is unfiltered (not
135 paginated) so that the user does not need to page through each
136 screen full of warnings when there are lots of them. */
139 vwarning (const char *string
, va_list args
)
141 if (deprecated_warning_hook
)
142 (*deprecated_warning_hook
) (string
, args
);
145 gdb::optional
<target_terminal::scoped_restore_terminal_state
> term_state
;
146 if (target_supports_terminal_ours ())
148 term_state
.emplace ();
149 target_terminal::ours_for_output ();
151 if (filtered_printing_initialized ())
152 wrap_here (""); /* Force out any buffered output. */
153 gdb_flush (gdb_stdout
);
154 if (warning_pre_print
)
155 fputs_unfiltered (warning_pre_print
, gdb_stderr
);
156 vfprintf_unfiltered (gdb_stderr
, string
, args
);
157 fprintf_unfiltered (gdb_stderr
, "\n");
161 /* Print an error message and return to command level.
162 The first argument STRING is the error message, used as a fprintf string,
163 and the remaining args are passed as arguments to it. */
166 verror (const char *string
, va_list args
)
168 throw_verror (GENERIC_ERROR
, string
, args
);
172 error_stream (const string_file
&stream
)
174 error (("%s"), stream
.c_str ());
177 /* Emit a message and abort. */
179 static void ATTRIBUTE_NORETURN
180 abort_with_message (const char *msg
)
182 if (current_ui
== NULL
)
185 fputs_unfiltered (msg
, gdb_stderr
);
187 abort (); /* NOTE: GDB has only three calls to abort(). */
190 /* Dump core trying to increase the core soft limit to hard limit first. */
195 #ifdef HAVE_SETRLIMIT
196 struct rlimit rlim
= { (rlim_t
) RLIM_INFINITY
, (rlim_t
) RLIM_INFINITY
};
198 setrlimit (RLIMIT_CORE
, &rlim
);
199 #endif /* HAVE_SETRLIMIT */
201 abort (); /* NOTE: GDB has only three calls to abort(). */
204 /* Check whether GDB will be able to dump core using the dump_core
205 function. Returns zero if GDB cannot or should not dump core.
206 If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected.
207 If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */
210 can_dump_core (enum resource_limit_kind limit_kind
)
212 #ifdef HAVE_GETRLIMIT
215 /* Be quiet and assume we can dump if an error is returned. */
216 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
222 if (rlim
.rlim_cur
== 0)
227 if (rlim
.rlim_max
== 0)
230 #endif /* HAVE_GETRLIMIT */
235 /* Print a warning that we cannot dump core. */
238 warn_cant_dump_core (const char *reason
)
240 fprintf_unfiltered (gdb_stderr
,
241 _("%s\nUnable to dump core, use `ulimit -c"
242 " unlimited' before executing GDB next time.\n"),
246 /* Check whether GDB will be able to dump core using the dump_core
247 function, and print a warning if we cannot. */
250 can_dump_core_warn (enum resource_limit_kind limit_kind
,
253 int core_dump_allowed
= can_dump_core (limit_kind
);
255 if (!core_dump_allowed
)
256 warn_cant_dump_core (reason
);
258 return core_dump_allowed
;
261 /* Allow the user to configure the debugger behavior with respect to
262 what to do when an internal problem is detected. */
264 const char internal_problem_ask
[] = "ask";
265 const char internal_problem_yes
[] = "yes";
266 const char internal_problem_no
[] = "no";
267 static const char *const internal_problem_modes
[] =
269 internal_problem_ask
,
270 internal_problem_yes
,
275 /* Print a message reporting an internal error/warning. Ask the user
276 if they want to continue, dump core, or just exit. Return
277 something to indicate a quit. */
279 struct internal_problem
282 int user_settable_should_quit
;
283 const char *should_quit
;
284 int user_settable_should_dump_core
;
285 const char *should_dump_core
;
288 /* Report a problem, internal to GDB, to the user. Once the problem
289 has been reported, and assuming GDB didn't quit, the caller can
290 either allow execution to resume or throw an error. */
292 static void ATTRIBUTE_PRINTF (4, 0)
293 internal_vproblem (struct internal_problem
*problem
,
294 const char *file
, int line
, const char *fmt
, va_list ap
)
301 /* Don't allow infinite error/warning recursion. */
303 static const char msg
[] = "Recursive internal problem.\n";
312 abort_with_message (msg
);
315 /* Newer GLIBC versions put the warn_unused_result attribute
316 on write, but this is one of those rare cases where
317 ignoring the return value is correct. Casting to (void)
318 does not fix this problem. This is the solution suggested
319 at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509. */
320 if (write (STDERR_FILENO
, msg
, sizeof (msg
)) != sizeof (msg
))
321 abort (); /* NOTE: GDB has only three calls to abort(). */
326 /* Create a string containing the full error/warning message. Need
327 to call query with this full string, as otherwize the reason
328 (error/warning) and question become separated. Format using a
329 style similar to a compiler error message. Include extra detail
330 so that the user knows that they are living on the edge. */
332 std::string msg
= string_vprintf (fmt
, ap
);
333 reason
= string_printf ("%s:%d: %s: %s\n"
334 "A problem internal to GDB has been detected,\n"
335 "further debugging may prove unreliable.",
336 file
, line
, problem
->name
, msg
.c_str ());
339 /* Fall back to abort_with_message if gdb_stderr is not set up. */
340 if (current_ui
== NULL
)
342 fputs (reason
.c_str (), stderr
);
343 abort_with_message ("\n");
346 /* Try to get the message out and at the start of a new line. */
347 gdb::optional
<target_terminal::scoped_restore_terminal_state
> term_state
;
348 if (target_supports_terminal_ours ())
350 term_state
.emplace ();
351 target_terminal::ours_for_output ();
353 if (filtered_printing_initialized ())
356 /* Emit the message unless query will emit it below. */
357 if (problem
->should_quit
!= internal_problem_ask
359 || !filtered_printing_initialized ())
360 fprintf_unfiltered (gdb_stderr
, "%s\n", reason
.c_str ());
362 if (problem
->should_quit
== internal_problem_ask
)
364 /* Default (yes/batch case) is to quit GDB. When in batch mode
365 this lessens the likelihood of GDB going into an infinite
367 if (!confirm
|| !filtered_printing_initialized ())
370 quit_p
= query (_("%s\nQuit this debugging session? "),
373 else if (problem
->should_quit
== internal_problem_yes
)
375 else if (problem
->should_quit
== internal_problem_no
)
378 internal_error (__FILE__
, __LINE__
, _("bad switch"));
380 fputs_unfiltered (_("\nThis is a bug, please report it."), gdb_stderr
);
381 if (REPORT_BUGS_TO
[0])
382 fprintf_unfiltered (gdb_stderr
, _(" For instructions, see:\n%s."),
384 fputs_unfiltered ("\n\n", gdb_stderr
);
386 if (problem
->should_dump_core
== internal_problem_ask
)
388 if (!can_dump_core_warn (LIMIT_MAX
, reason
.c_str ()))
390 else if (!filtered_printing_initialized ())
394 /* Default (yes/batch case) is to dump core. This leaves a GDB
395 `dropping' so that it is easier to see that something went
397 dump_core_p
= query (_("%s\nCreate a core file of GDB? "),
401 else if (problem
->should_dump_core
== internal_problem_yes
)
402 dump_core_p
= can_dump_core_warn (LIMIT_MAX
, reason
.c_str ());
403 else if (problem
->should_dump_core
== internal_problem_no
)
406 internal_error (__FILE__
, __LINE__
, _("bad switch"));
419 #ifdef HAVE_WORKING_FORK
429 static struct internal_problem internal_error_problem
= {
430 "internal-error", 1, internal_problem_ask
, 1, internal_problem_ask
434 internal_verror (const char *file
, int line
, const char *fmt
, va_list ap
)
436 internal_vproblem (&internal_error_problem
, file
, line
, fmt
, ap
);
437 throw_quit (_("Command aborted."));
440 static struct internal_problem internal_warning_problem
= {
441 "internal-warning", 1, internal_problem_ask
, 1, internal_problem_ask
445 internal_vwarning (const char *file
, int line
, const char *fmt
, va_list ap
)
447 internal_vproblem (&internal_warning_problem
, file
, line
, fmt
, ap
);
450 static struct internal_problem demangler_warning_problem
= {
451 "demangler-warning", 1, internal_problem_ask
, 0, internal_problem_no
455 demangler_vwarning (const char *file
, int line
, const char *fmt
, va_list ap
)
457 internal_vproblem (&demangler_warning_problem
, file
, line
, fmt
, ap
);
461 demangler_warning (const char *file
, int line
, const char *string
, ...)
465 va_start (ap
, string
);
466 demangler_vwarning (file
, line
, string
, ap
);
470 /* Dummy functions to keep add_prefix_cmd happy. */
473 set_internal_problem_cmd (const char *args
, int from_tty
)
478 show_internal_problem_cmd (const char *args
, int from_tty
)
482 /* When GDB reports an internal problem (error or warning) it gives
483 the user the opportunity to quit GDB and/or create a core file of
484 the current debug session. This function registers a few commands
485 that make it possible to specify that GDB should always or never
486 quit or create a core file, without asking. The commands look
489 maint set PROBLEM-NAME quit ask|yes|no
490 maint show PROBLEM-NAME quit
491 maint set PROBLEM-NAME corefile ask|yes|no
492 maint show PROBLEM-NAME corefile
494 Where PROBLEM-NAME is currently "internal-error" or
495 "internal-warning". */
498 add_internal_problem_command (struct internal_problem
*problem
)
500 struct cmd_list_element
**set_cmd_list
;
501 struct cmd_list_element
**show_cmd_list
;
505 set_cmd_list
= XNEW (struct cmd_list_element
*);
506 show_cmd_list
= XNEW (struct cmd_list_element
*);
507 *set_cmd_list
= NULL
;
508 *show_cmd_list
= NULL
;
510 set_doc
= xstrprintf (_("Configure what GDB does when %s is detected."),
513 show_doc
= xstrprintf (_("Show what GDB does when %s is detected."),
516 add_prefix_cmd (problem
->name
,
517 class_maintenance
, set_internal_problem_cmd
, set_doc
,
519 concat ("maintenance set ", problem
->name
, " ",
521 0/*allow-unknown*/, &maintenance_set_cmdlist
);
523 add_prefix_cmd (problem
->name
,
524 class_maintenance
, show_internal_problem_cmd
, show_doc
,
526 concat ("maintenance show ", problem
->name
, " ",
528 0/*allow-unknown*/, &maintenance_show_cmdlist
);
530 if (problem
->user_settable_should_quit
)
532 set_doc
= xstrprintf (_("Set whether GDB should quit "
533 "when an %s is detected"),
535 show_doc
= xstrprintf (_("Show whether GDB will quit "
536 "when an %s is detected"),
538 add_setshow_enum_cmd ("quit", class_maintenance
,
539 internal_problem_modes
,
540 &problem
->should_quit
,
553 if (problem
->user_settable_should_dump_core
)
555 set_doc
= xstrprintf (_("Set whether GDB should create a core "
556 "file of GDB when %s is detected"),
558 show_doc
= xstrprintf (_("Show whether GDB will create a core "
559 "file of GDB when %s is detected"),
561 add_setshow_enum_cmd ("corefile", class_maintenance
,
562 internal_problem_modes
,
563 &problem
->should_dump_core
,
577 /* Return a newly allocated string, containing the PREFIX followed
578 by the system error message for errno (separated by a colon). */
581 perror_string (const char *prefix
)
585 err
= safe_strerror (errno
);
586 return std::string (prefix
) + ": " + err
;
589 /* Print the system error message for errno, and also mention STRING
590 as the file name for which the error was encountered. Use ERRCODE
591 for the thrown exception. Then return to command level. */
594 throw_perror_with_name (enum errors errcode
, const char *string
)
596 std::string combined
= perror_string (string
);
598 /* I understand setting these is a matter of taste. Still, some people
599 may clear errno but not know about bfd_error. Doing this here is not
601 bfd_set_error (bfd_error_no_error
);
604 throw_error (errcode
, _("%s."), combined
.c_str ());
607 /* See throw_perror_with_name, ERRCODE defaults here to GENERIC_ERROR. */
610 perror_with_name (const char *string
)
612 throw_perror_with_name (GENERIC_ERROR
, string
);
615 /* Same as perror_with_name except that it prints a warning instead
616 of throwing an error. */
619 perror_warning_with_name (const char *string
)
621 std::string combined
= perror_string (string
);
622 warning (_("%s"), combined
.c_str ());
625 /* Print the system error message for ERRCODE, and also mention STRING
626 as the file name for which the error was encountered. */
629 print_sys_errmsg (const char *string
, int errcode
)
634 err
= safe_strerror (errcode
);
635 combined
= (char *) alloca (strlen (err
) + strlen (string
) + 3);
636 strcpy (combined
, string
);
637 strcat (combined
, ": ");
638 strcat (combined
, err
);
640 /* We want anything which was printed on stdout to come out first, before
642 gdb_flush (gdb_stdout
);
643 fprintf_unfiltered (gdb_stderr
, "%s.\n", combined
);
646 /* Control C eventually causes this to be called, at a convenient time. */
651 if (sync_quit_force_run
)
653 sync_quit_force_run
= 0;
654 quit_force (NULL
, 0);
658 /* No steenking SIGINT will ever be coming our way when the
659 program is resumed. Don't lie. */
663 /* If there is no terminal switching for this target, then we can't
664 possibly get screwed by the lack of job control. */
665 || !target_supports_terminal_ours ())
668 throw_quit ("Quit (expect signal SIGINT when the program is resumed)");
677 if (sync_quit_force_run
)
682 if (deprecated_interactive_hook
)
683 deprecated_interactive_hook ();
687 /* Called when a memory allocation fails, with the number of bytes of
688 memory requested in SIZE. */
691 malloc_failure (long size
)
695 internal_error (__FILE__
, __LINE__
,
696 _("virtual memory exhausted: can't allocate %ld bytes."),
701 internal_error (__FILE__
, __LINE__
, _("virtual memory exhausted."));
705 /* My replacement for the read system call.
706 Used like `read' but keeps going if `read' returns too soon. */
709 myread (int desc
, char *addr
, int len
)
716 val
= read (desc
, addr
, len
);
728 print_spaces (int n
, struct ui_file
*file
)
730 fputs_unfiltered (n_spaces (n
), file
);
733 /* Print a host address. */
736 gdb_print_host_address_1 (const void *addr
, struct ui_file
*stream
)
738 fprintf_filtered (stream
, "%s", host_address_to_string (addr
));
744 make_hex_string (const gdb_byte
*data
, size_t length
)
746 char *result
= (char *) xmalloc (length
* 2 + 1);
751 for (i
= 0; i
< length
; ++i
)
752 p
+= xsnprintf (p
, 3, "%02x", data
[i
]);
759 /* An RAII class that sets up to handle input and then tears down
760 during destruction. */
762 class scoped_input_handler
766 scoped_input_handler ()
767 : m_quit_handler (&quit_handler
, default_quit_handler
),
770 target_terminal::ours ();
771 ui_register_input_event_handler (current_ui
);
772 if (current_ui
->prompt_state
== PROMPT_BLOCKED
)
776 ~scoped_input_handler ()
779 ui_unregister_input_event_handler (m_ui
);
782 DISABLE_COPY_AND_ASSIGN (scoped_input_handler
);
786 /* Save and restore the terminal state. */
787 target_terminal::scoped_restore_terminal_state m_term_state
;
789 /* Save and restore the quit handler. */
790 scoped_restore_tmpl
<quit_handler_ftype
*> m_quit_handler
;
792 /* The saved UI, if non-NULL. */
798 /* This function supports the query, nquery, and yquery functions.
799 Ask user a y-or-n question and return 0 if answer is no, 1 if
800 answer is yes, or default the answer to the specified default
801 (for yquery or nquery). DEFCHAR may be 'y' or 'n' to provide a
802 default answer, or '\0' for no default.
803 CTLSTR is the control string and should end in "? ". It should
804 not say how to answer, because we do that.
805 ARGS are the arguments passed along with the CTLSTR argument to
808 static int ATTRIBUTE_PRINTF (1, 0)
809 defaulted_query (const char *ctlstr
, const char defchar
, va_list args
)
813 char def_answer
, not_def_answer
;
814 const char *y_string
, *n_string
;
816 /* Set up according to which answer is the default. */
821 not_def_answer
= 'N';
825 else if (defchar
== 'y')
829 not_def_answer
= 'N';
837 not_def_answer
= 'Y';
842 /* Automatically answer the default value if the user did not want
843 prompts or the command was issued with the server prefix. */
844 if (!confirm
|| server_command
)
847 /* If input isn't coming from the user directly, just say what
848 question we're asking, and then answer the default automatically. This
849 way, important error messages don't get lost when talking to GDB
851 if (current_ui
->instream
!= current_ui
->stdin_stream
852 || !input_interactive_p (current_ui
)
853 /* Restrict queries to the main UI. */
854 || current_ui
!= main_ui
)
856 target_terminal::scoped_restore_terminal_state term_state
;
857 target_terminal::ours_for_output ();
859 vfprintf_filtered (gdb_stdout
, ctlstr
, args
);
861 printf_filtered (_("(%s or %s) [answered %c; "
862 "input not from terminal]\n"),
863 y_string
, n_string
, def_answer
);
868 if (deprecated_query_hook
)
870 target_terminal::scoped_restore_terminal_state term_state
;
871 return deprecated_query_hook (ctlstr
, args
);
874 /* Format the question outside of the loop, to avoid reusing args. */
875 std::string question
= string_vprintf (ctlstr
, args
);
877 = string_printf (_("%s%s(%s or %s) %s"),
878 annotation_level
> 1 ? "\n\032\032pre-query\n" : "",
879 question
.c_str (), y_string
, n_string
,
880 annotation_level
> 1 ? "\n\032\032query\n" : "");
882 /* Used to add duration we waited for user to respond to
883 prompt_for_continue_wait_time. */
884 using namespace std::chrono
;
885 steady_clock::time_point prompt_started
= steady_clock::now ();
887 scoped_input_handler prepare_input
;
891 char *response
, answer
;
893 gdb_flush (gdb_stdout
);
894 response
= gdb_readline_wrapper (prompt
.c_str ());
896 if (response
== NULL
) /* C-d */
898 printf_filtered ("EOF [assumed %c]\n", def_answer
);
903 answer
= response
[0];
908 /* Check answer. For the non-default, the user must specify
909 the non-default explicitly. */
910 if (answer
== not_def_answer
)
915 /* Otherwise, if a default was specified, the user may either
916 specify the required input or have it default by entering
918 if (answer
== def_answer
919 || (defchar
!= '\0' && answer
== '\0'))
924 /* Invalid entries are not defaulted and require another selection. */
925 printf_filtered (_("Please answer %s or %s.\n"),
929 /* Add time spend in this routine to prompt_for_continue_wait_time. */
930 prompt_for_continue_wait_time
+= steady_clock::now () - prompt_started
;
932 if (annotation_level
> 1)
933 printf_filtered (("\n\032\032post-query\n"));
938 /* Ask user a y-or-n question and return 0 if answer is no, 1 if
939 answer is yes, or 0 if answer is defaulted.
940 Takes three args which are given to printf to print the question.
941 The first, a control string, should end in "? ".
942 It should not say how to answer, because we do that. */
945 nquery (const char *ctlstr
, ...)
950 va_start (args
, ctlstr
);
951 ret
= defaulted_query (ctlstr
, 'n', args
);
956 /* Ask user a y-or-n question and return 0 if answer is no, 1 if
957 answer is yes, or 1 if answer is defaulted.
958 Takes three args which are given to printf to print the question.
959 The first, a control string, should end in "? ".
960 It should not say how to answer, because we do that. */
963 yquery (const char *ctlstr
, ...)
968 va_start (args
, ctlstr
);
969 ret
= defaulted_query (ctlstr
, 'y', args
);
974 /* Ask user a y-or-n question and return 1 iff answer is yes.
975 Takes three args which are given to printf to print the question.
976 The first, a control string, should end in "? ".
977 It should not say how to answer, because we do that. */
980 query (const char *ctlstr
, ...)
985 va_start (args
, ctlstr
);
986 ret
= defaulted_query (ctlstr
, '\0', args
);
991 /* A helper for parse_escape that converts a host character to a
992 target character. C is the host character. If conversion is
993 possible, then the target character is stored in *TARGET_C and the
994 function returns 1. Otherwise, the function returns 0. */
997 host_char_to_target (struct gdbarch
*gdbarch
, int c
, int *target_c
)
1002 auto_obstack host_data
;
1004 convert_between_encodings (target_charset (gdbarch
), host_charset (),
1005 (gdb_byte
*) &the_char
, 1, 1,
1006 &host_data
, translit_none
);
1008 if (obstack_object_size (&host_data
) == 1)
1011 *target_c
= *(char *) obstack_base (&host_data
);
1017 /* Parse a C escape sequence. STRING_PTR points to a variable
1018 containing a pointer to the string to parse. That pointer
1019 should point to the character after the \. That pointer
1020 is updated past the characters we use. The value of the
1021 escape sequence is returned.
1023 A negative value means the sequence \ newline was seen,
1024 which is supposed to be equivalent to nothing at all.
1026 If \ is followed by a null character, we return a negative
1027 value and leave the string pointer pointing at the null character.
1029 If \ is followed by 000, we return 0 and leave the string pointer
1030 after the zeros. A value of 0 does not mean end of string. */
1033 parse_escape (struct gdbarch
*gdbarch
, const char **string_ptr
)
1035 int target_char
= -2; /* Initialize to avoid GCC warnings. */
1036 int c
= *(*string_ptr
)++;
1055 int i
= host_hex_value (c
);
1060 if (isdigit (c
) && c
!= '8' && c
!= '9')
1064 i
+= host_hex_value (c
);
1100 if (!host_char_to_target (gdbarch
, c
, &target_char
))
1101 error (_("The escape sequence `\\%c' is equivalent to plain `%c',"
1102 " which has no equivalent\nin the `%s' character set."),
1103 c
, c
, target_charset (gdbarch
));
1107 /* Print the character C on STREAM as part of the contents of a literal
1108 string whose delimiter is QUOTER. Note that this routine should only
1109 be called for printing things which are independent of the language
1110 of the program being debugged.
1112 printchar will normally escape backslashes and instances of QUOTER. If
1113 QUOTER is 0, printchar won't escape backslashes or any quoting character.
1114 As a side effect, if you pass the backslash character as the QUOTER,
1115 printchar will escape backslashes as usual, but not any other quoting
1119 printchar (int c
, do_fputc_ftype do_fputc
, ui_file
*stream
, int quoter
)
1121 c
&= 0xFF; /* Avoid sign bit follies */
1123 if (c
< 0x20 || /* Low control chars */
1124 (c
>= 0x7F && c
< 0xA0) || /* DEL, High controls */
1125 (sevenbit_strings
&& c
>= 0x80))
1126 { /* high order bit set */
1127 do_fputc ('\\', stream
);
1132 do_fputc ('n', stream
);
1135 do_fputc ('b', stream
);
1138 do_fputc ('t', stream
);
1141 do_fputc ('f', stream
);
1144 do_fputc ('r', stream
);
1147 do_fputc ('e', stream
);
1150 do_fputc ('a', stream
);
1154 do_fputc ('0' + ((c
>> 6) & 0x7), stream
);
1155 do_fputc ('0' + ((c
>> 3) & 0x7), stream
);
1156 do_fputc ('0' + ((c
>> 0) & 0x7), stream
);
1163 if (quoter
!= 0 && (c
== '\\' || c
== quoter
))
1164 do_fputc ('\\', stream
);
1165 do_fputc (c
, stream
);
1169 /* Print the character C on STREAM as part of the contents of a
1170 literal string whose delimiter is QUOTER. Note that these routines
1171 should only be call for printing things which are independent of
1172 the language of the program being debugged. */
1175 fputstr_filtered (const char *str
, int quoter
, struct ui_file
*stream
)
1178 printchar (*str
++, fputc_filtered
, stream
, quoter
);
1182 fputstr_unfiltered (const char *str
, int quoter
, struct ui_file
*stream
)
1185 printchar (*str
++, fputc_unfiltered
, stream
, quoter
);
1189 fputstrn_filtered (const char *str
, int n
, int quoter
,
1190 struct ui_file
*stream
)
1192 for (int i
= 0; i
< n
; i
++)
1193 printchar (str
[i
], fputc_filtered
, stream
, quoter
);
1197 fputstrn_unfiltered (const char *str
, int n
, int quoter
,
1198 do_fputc_ftype do_fputc
, struct ui_file
*stream
)
1200 for (int i
= 0; i
< n
; i
++)
1201 printchar (str
[i
], do_fputc
, stream
, quoter
);
1205 /* Number of lines per page or UINT_MAX if paging is disabled. */
1206 static unsigned int lines_per_page
;
1208 show_lines_per_page (struct ui_file
*file
, int from_tty
,
1209 struct cmd_list_element
*c
, const char *value
)
1211 fprintf_filtered (file
,
1212 _("Number of lines gdb thinks are in a page is %s.\n"),
1216 /* Number of chars per line or UINT_MAX if line folding is disabled. */
1217 static unsigned int chars_per_line
;
1219 show_chars_per_line (struct ui_file
*file
, int from_tty
,
1220 struct cmd_list_element
*c
, const char *value
)
1222 fprintf_filtered (file
,
1223 _("Number of characters gdb thinks "
1224 "are in a line is %s.\n"),
1228 /* Current count of lines printed on this page, chars on this line. */
1229 static unsigned int lines_printed
, chars_printed
;
1231 /* True if pagination is disabled for just one command. */
1233 static bool pagination_disabled_for_command
;
1235 /* Buffer and start column of buffered text, for doing smarter word-
1236 wrapping. When someone calls wrap_here(), we start buffering output
1237 that comes through fputs_filtered(). If we see a newline, we just
1238 spit it out and forget about the wrap_here(). If we see another
1239 wrap_here(), we spit it out and remember the newer one. If we see
1240 the end of the line, we spit out a newline, the indent, and then
1241 the buffered output. */
1243 static bool filter_initialized
= false;
1245 /* Contains characters which are waiting to be output (they have
1246 already been counted in chars_printed). */
1247 static std::string wrap_buffer
;
1249 /* String to indent by if the wrap occurs. Must not be NULL if wrap_column
1251 static const char *wrap_indent
;
1253 /* Column number on the screen where wrap_buffer begins, or 0 if wrapping
1254 is not in effect. */
1255 static int wrap_column
;
1257 /* The style applied at the time that wrap_here was called. */
1258 static ui_file_style wrap_style
;
1261 /* Initialize the number of lines per page and chars per line. */
1264 init_page_info (void)
1268 lines_per_page
= UINT_MAX
;
1269 chars_per_line
= UINT_MAX
;
1273 if (!tui_get_command_dimension (&chars_per_line
, &lines_per_page
))
1278 #if defined(__GO32__)
1279 rows
= ScreenRows ();
1280 cols
= ScreenCols ();
1281 lines_per_page
= rows
;
1282 chars_per_line
= cols
;
1284 /* Make sure Readline has initialized its terminal settings. */
1285 rl_reset_terminal (NULL
);
1287 /* Get the screen size from Readline. */
1288 rl_get_screen_size (&rows
, &cols
);
1289 lines_per_page
= rows
;
1290 chars_per_line
= cols
;
1292 /* Readline should have fetched the termcap entry for us.
1293 Only try to use tgetnum function if rl_get_screen_size
1294 did not return a useful value. */
1295 if (((rows
<= 0) && (tgetnum ((char *) "li") < 0))
1296 /* Also disable paging if inside Emacs. $EMACS was used
1297 before Emacs v25.1, $INSIDE_EMACS is used since then. */
1298 || getenv ("EMACS") || getenv ("INSIDE_EMACS"))
1300 /* The number of lines per page is not mentioned in the terminal
1301 description or EMACS evironment variable is set. This probably
1302 means that paging is not useful, so disable paging. */
1303 lines_per_page
= UINT_MAX
;
1306 /* If the output is not a terminal, don't paginate it. */
1307 if (!ui_file_isatty (gdb_stdout
))
1308 lines_per_page
= UINT_MAX
;
1312 /* We handle SIGWINCH ourselves. */
1313 rl_catch_sigwinch
= 0;
1319 /* Return nonzero if filtered printing is initialized. */
1321 filtered_printing_initialized (void)
1323 return filter_initialized
;
1326 set_batch_flag_and_restore_page_info::set_batch_flag_and_restore_page_info ()
1327 : m_save_lines_per_page (lines_per_page
),
1328 m_save_chars_per_line (chars_per_line
),
1329 m_save_batch_flag (batch_flag
)
1335 set_batch_flag_and_restore_page_info::~set_batch_flag_and_restore_page_info ()
1337 batch_flag
= m_save_batch_flag
;
1338 chars_per_line
= m_save_chars_per_line
;
1339 lines_per_page
= m_save_lines_per_page
;
1345 /* Set the screen size based on LINES_PER_PAGE and CHARS_PER_LINE. */
1348 set_screen_size (void)
1350 int rows
= lines_per_page
;
1351 int cols
= chars_per_line
;
1353 /* If we get 0 or negative ROWS or COLS, treat as "infinite" size.
1354 A negative number can be seen here with the "set width/height"
1355 commands and either:
1357 - the user specified "unlimited", which maps to UINT_MAX, or
1358 - the user spedified some number between INT_MAX and UINT_MAX.
1360 Cap "infinity" to approximately sqrt(INT_MAX) so that we don't
1361 overflow in rl_set_screen_size, which multiplies rows and columns
1362 to compute the number of characters on the screen. */
1364 const int sqrt_int_max
= INT_MAX
>> (sizeof (int) * 8 / 2);
1366 if (rows
<= 0 || rows
> sqrt_int_max
)
1368 rows
= sqrt_int_max
;
1369 lines_per_page
= UINT_MAX
;
1372 if (cols
<= 0 || cols
> sqrt_int_max
)
1374 cols
= sqrt_int_max
;
1375 chars_per_line
= UINT_MAX
;
1378 /* Update Readline's idea of the terminal size. */
1379 rl_set_screen_size (rows
, cols
);
1382 /* Reinitialize WRAP_BUFFER. */
1387 if (chars_per_line
== 0)
1390 wrap_buffer
.clear ();
1391 filter_initialized
= true;
1395 set_width_command (const char *args
, int from_tty
, struct cmd_list_element
*c
)
1402 set_height_command (const char *args
, int from_tty
, struct cmd_list_element
*c
)
1410 set_screen_width_and_height (int width
, int height
)
1412 lines_per_page
= height
;
1413 chars_per_line
= width
;
1419 /* The currently applied style. */
1421 static ui_file_style applied_style
;
1423 /* Emit an ANSI style escape for STYLE. If STREAM is nullptr, emit to
1424 the wrap buffer; otherwise emit to STREAM. */
1427 emit_style_escape (const ui_file_style
&style
,
1428 struct ui_file
*stream
= nullptr)
1430 applied_style
= style
;
1432 if (stream
== nullptr)
1433 wrap_buffer
.append (style
.to_ansi ());
1435 fputs_unfiltered (style
.to_ansi ().c_str (), stream
);
1441 can_emit_style_escape (struct ui_file
*stream
)
1443 if (stream
!= gdb_stdout
1445 || !ui_file_isatty (stream
))
1447 const char *term
= getenv ("TERM");
1448 /* Windows doesn't by default define $TERM, but can support styles
1451 if (term
== nullptr || !strcmp (term
, "dumb"))
1454 /* But if they do define $TERM, let us behave the same as on Posix
1455 platforms, for the benefit of programs which invoke GDB as their
1457 if (term
&& !strcmp (term
, "dumb"))
1463 /* Set the current output style. This will affect future uses of the
1464 _filtered output functions. */
1467 set_output_style (struct ui_file
*stream
, const ui_file_style
&style
)
1469 if (!can_emit_style_escape (stream
))
1472 /* Note that we don't pass STREAM here, because we want to emit to
1473 the wrap buffer, not directly to STREAM. */
1474 emit_style_escape (style
);
1480 reset_terminal_style (struct ui_file
*stream
)
1482 if (can_emit_style_escape (stream
))
1484 /* Force the setting, regardless of what we think the setting
1485 might already be. */
1486 applied_style
= ui_file_style ();
1487 wrap_buffer
.append (applied_style
.to_ansi ());
1491 /* Wait, so the user can read what's on the screen. Prompt the user
1492 to continue by pressing RETURN. 'q' is also provided because
1493 telling users what to do in the prompt is more user-friendly than
1494 expecting them to think of Ctrl-C/SIGINT. */
1497 prompt_for_continue (void)
1499 char cont_prompt
[120];
1500 /* Used to add duration we waited for user to respond to
1501 prompt_for_continue_wait_time. */
1502 using namespace std::chrono
;
1503 steady_clock::time_point prompt_started
= steady_clock::now ();
1504 bool disable_pagination
= pagination_disabled_for_command
;
1506 /* Clear the current styling. */
1507 if (can_emit_style_escape (gdb_stdout
))
1508 emit_style_escape (ui_file_style (), gdb_stdout
);
1510 if (annotation_level
> 1)
1511 printf_unfiltered (("\n\032\032pre-prompt-for-continue\n"));
1513 strcpy (cont_prompt
,
1514 "--Type <RET> for more, q to quit, "
1515 "c to continue without paging--");
1516 if (annotation_level
> 1)
1517 strcat (cont_prompt
, "\n\032\032prompt-for-continue\n");
1519 /* We must do this *before* we call gdb_readline_wrapper, else it
1520 will eventually call us -- thinking that we're trying to print
1521 beyond the end of the screen. */
1522 reinitialize_more_filter ();
1524 scoped_input_handler prepare_input
;
1526 /* Call gdb_readline_wrapper, not readline, in order to keep an
1527 event loop running. */
1528 gdb::unique_xmalloc_ptr
<char> ignore (gdb_readline_wrapper (cont_prompt
));
1530 /* Add time spend in this routine to prompt_for_continue_wait_time. */
1531 prompt_for_continue_wait_time
+= steady_clock::now () - prompt_started
;
1533 if (annotation_level
> 1)
1534 printf_unfiltered (("\n\032\032post-prompt-for-continue\n"));
1538 char *p
= ignore
.get ();
1540 while (*p
== ' ' || *p
== '\t')
1543 /* Do not call quit here; there is no possibility of SIGINT. */
1544 throw_quit ("Quit");
1546 disable_pagination
= true;
1549 /* Now we have to do this again, so that GDB will know that it doesn't
1550 need to save the ---Type <return>--- line at the top of the screen. */
1551 reinitialize_more_filter ();
1552 pagination_disabled_for_command
= disable_pagination
;
1554 dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */
1557 /* Initialize timer to keep track of how long we waited for the user. */
1560 reset_prompt_for_continue_wait_time (void)
1562 using namespace std::chrono
;
1564 prompt_for_continue_wait_time
= steady_clock::duration::zero ();
1567 /* Fetch the cumulative time spent in prompt_for_continue. */
1569 std::chrono::steady_clock::duration
1570 get_prompt_for_continue_wait_time ()
1572 return prompt_for_continue_wait_time
;
1575 /* Reinitialize filter; ie. tell it to reset to original values. */
1578 reinitialize_more_filter (void)
1582 pagination_disabled_for_command
= false;
1585 /* Flush the wrap buffer to STREAM, if necessary. */
1588 flush_wrap_buffer (struct ui_file
*stream
)
1590 if (stream
== gdb_stdout
&& !wrap_buffer
.empty ())
1592 fputs_unfiltered (wrap_buffer
.c_str (), stream
);
1593 wrap_buffer
.clear ();
1597 /* Indicate that if the next sequence of characters overflows the line,
1598 a newline should be inserted here rather than when it hits the end.
1599 If INDENT is non-null, it is a string to be printed to indent the
1600 wrapped part on the next line. INDENT must remain accessible until
1601 the next call to wrap_here() or until a newline is printed through
1604 If the line is already overfull, we immediately print a newline and
1605 the indentation, and disable further wrapping.
1607 If we don't know the width of lines, but we know the page height,
1608 we must not wrap words, but should still keep track of newlines
1609 that were explicitly printed.
1611 INDENT should not contain tabs, as that will mess up the char count
1612 on the next line. FIXME.
1614 This routine is guaranteed to force out any output which has been
1615 squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be
1616 used to force out output from the wrap_buffer. */
1619 wrap_here (const char *indent
)
1621 /* This should have been allocated, but be paranoid anyway. */
1622 if (!filter_initialized
)
1623 internal_error (__FILE__
, __LINE__
,
1624 _("failed internal consistency check"));
1626 flush_wrap_buffer (gdb_stdout
);
1627 if (chars_per_line
== UINT_MAX
) /* No line overflow checking. */
1631 else if (chars_printed
>= chars_per_line
)
1633 puts_filtered ("\n");
1635 puts_filtered (indent
);
1640 wrap_column
= chars_printed
;
1644 wrap_indent
= indent
;
1645 wrap_style
= applied_style
;
1649 /* Print input string to gdb_stdout, filtered, with wrap,
1650 arranging strings in columns of n chars. String can be
1651 right or left justified in the column. Never prints
1652 trailing spaces. String should never be longer than
1653 width. FIXME: this could be useful for the EXAMINE
1654 command, which currently doesn't tabulate very well. */
1657 puts_filtered_tabular (char *string
, int width
, int right
)
1663 gdb_assert (chars_per_line
> 0);
1664 if (chars_per_line
== UINT_MAX
)
1666 fputs_filtered (string
, gdb_stdout
);
1667 fputs_filtered ("\n", gdb_stdout
);
1671 if (((chars_printed
- 1) / width
+ 2) * width
>= chars_per_line
)
1672 fputs_filtered ("\n", gdb_stdout
);
1674 if (width
>= chars_per_line
)
1675 width
= chars_per_line
- 1;
1677 stringlen
= strlen (string
);
1679 if (chars_printed
> 0)
1680 spaces
= width
- (chars_printed
- 1) % width
- 1;
1682 spaces
+= width
- stringlen
;
1684 spacebuf
= (char *) alloca (spaces
+ 1);
1685 spacebuf
[spaces
] = '\0';
1687 spacebuf
[spaces
] = ' ';
1689 fputs_filtered (spacebuf
, gdb_stdout
);
1690 fputs_filtered (string
, gdb_stdout
);
1694 /* Ensure that whatever gets printed next, using the filtered output
1695 commands, starts at the beginning of the line. I.e. if there is
1696 any pending output for the current line, flush it and start a new
1697 line. Otherwise do nothing. */
1702 if (chars_printed
> 0)
1704 puts_filtered ("\n");
1709 /* Like fputs but if FILTER is true, pause after every screenful.
1711 Regardless of FILTER can wrap at points other than the final
1712 character of a line.
1714 Unlike fputs, fputs_maybe_filtered does not return a value.
1715 It is OK for LINEBUFFER to be NULL, in which case just don't print
1718 Note that a longjmp to top level may occur in this routine (only if
1719 FILTER is true) (since prompt_for_continue may do so) so this
1720 routine should not be called when cleanups are not in place. */
1723 fputs_maybe_filtered (const char *linebuffer
, struct ui_file
*stream
,
1726 const char *lineptr
;
1728 if (linebuffer
== 0)
1731 /* Don't do any filtering if it is disabled. */
1732 if (stream
!= gdb_stdout
1733 || !pagination_enabled
1734 || pagination_disabled_for_command
1736 || (lines_per_page
== UINT_MAX
&& chars_per_line
== UINT_MAX
)
1737 || top_level_interpreter () == NULL
1738 || top_level_interpreter ()->interp_ui_out ()->is_mi_like_p ())
1740 flush_wrap_buffer (stream
);
1741 fputs_unfiltered (linebuffer
, stream
);
1746 = make_scope_exit ([&] ()
1748 wrap_buffer
.clear ();
1753 /* Go through and output each character. Show line extension
1754 when this is necessary; prompt user for new page when this is
1757 lineptr
= linebuffer
;
1760 /* Possible new page. Note that PAGINATION_DISABLED_FOR_COMMAND
1761 might be set during this loop, so we must continue to check
1763 if (filter
&& (lines_printed
>= lines_per_page
- 1)
1764 && !pagination_disabled_for_command
)
1765 prompt_for_continue ();
1767 while (*lineptr
&& *lineptr
!= '\n')
1771 /* Print a single line. */
1772 if (*lineptr
== '\t')
1774 wrap_buffer
.push_back ('\t');
1775 /* Shifting right by 3 produces the number of tab stops
1776 we have already passed, and then adding one and
1777 shifting left 3 advances to the next tab stop. */
1778 chars_printed
= ((chars_printed
>> 3) + 1) << 3;
1781 else if (*lineptr
== '\033'
1782 && skip_ansi_escape (lineptr
, &skip_bytes
))
1784 wrap_buffer
.append (lineptr
, skip_bytes
);
1785 /* Note that we don't consider this a character, so we
1786 don't increment chars_printed here. */
1787 lineptr
+= skip_bytes
;
1791 wrap_buffer
.push_back (*lineptr
);
1796 if (chars_printed
>= chars_per_line
)
1798 unsigned int save_chars
= chars_printed
;
1804 if (can_emit_style_escape (stream
))
1805 emit_style_escape (ui_file_style (), stream
);
1806 /* If we aren't actually wrapping, don't output
1807 newline -- if chars_per_line is right, we
1808 probably just overflowed anyway; if it's wrong,
1809 let us keep going. */
1810 fputc_unfiltered ('\n', stream
);
1813 flush_wrap_buffer (stream
);
1815 /* Possible new page. Note that
1816 PAGINATION_DISABLED_FOR_COMMAND might be set during
1817 this loop, so we must continue to check it here. */
1818 if (lines_printed
>= lines_per_page
- 1
1819 && !pagination_disabled_for_command
)
1820 prompt_for_continue ();
1822 /* Now output indentation and wrapped string. */
1825 fputs_unfiltered (wrap_indent
, stream
);
1826 if (can_emit_style_escape (stream
))
1827 emit_style_escape (wrap_style
, stream
);
1828 /* FIXME, this strlen is what prevents wrap_indent from
1829 containing tabs. However, if we recurse to print it
1830 and count its chars, we risk trouble if wrap_indent is
1831 longer than (the user settable) chars_per_line.
1832 Note also that this can set chars_printed > chars_per_line
1833 if we are printing a long string. */
1834 chars_printed
= strlen (wrap_indent
)
1835 + (save_chars
- wrap_column
);
1836 wrap_column
= 0; /* And disable fancy wrap */
1841 if (*lineptr
== '\n')
1844 wrap_here ((char *) 0); /* Spit out chars, cancel
1847 fputc_unfiltered ('\n', stream
);
1852 buffer_clearer
.release ();
1856 fputs_filtered (const char *linebuffer
, struct ui_file
*stream
)
1858 fputs_maybe_filtered (linebuffer
, stream
, 1);
1864 fputs_styled (const char *linebuffer
, const ui_file_style
&style
,
1865 struct ui_file
*stream
)
1867 /* This just makes it so we emit somewhat fewer escape
1869 if (style
.is_default ())
1870 fputs_maybe_filtered (linebuffer
, stream
, 1);
1873 set_output_style (stream
, style
);
1874 fputs_maybe_filtered (linebuffer
, stream
, 1);
1875 set_output_style (stream
, ui_file_style ());
1880 putchar_unfiltered (int c
)
1884 ui_file_write (gdb_stdout
, &buf
, 1);
1888 /* Write character C to gdb_stdout using GDB's paging mechanism and return C.
1889 May return nonlocally. */
1892 putchar_filtered (int c
)
1894 return fputc_filtered (c
, gdb_stdout
);
1898 fputc_unfiltered (int c
, struct ui_file
*stream
)
1902 ui_file_write (stream
, &buf
, 1);
1907 fputc_filtered (int c
, struct ui_file
*stream
)
1913 fputs_filtered (buf
, stream
);
1917 /* puts_debug is like fputs_unfiltered, except it prints special
1918 characters in printable fashion. */
1921 puts_debug (char *prefix
, char *string
, char *suffix
)
1925 /* Print prefix and suffix after each line. */
1926 static int new_line
= 1;
1927 static int return_p
= 0;
1928 static const char *prev_prefix
= "";
1929 static const char *prev_suffix
= "";
1931 if (*string
== '\n')
1934 /* If the prefix is changing, print the previous suffix, a new line,
1935 and the new prefix. */
1936 if ((return_p
|| (strcmp (prev_prefix
, prefix
) != 0)) && !new_line
)
1938 fputs_unfiltered (prev_suffix
, gdb_stdlog
);
1939 fputs_unfiltered ("\n", gdb_stdlog
);
1940 fputs_unfiltered (prefix
, gdb_stdlog
);
1943 /* Print prefix if we printed a newline during the previous call. */
1947 fputs_unfiltered (prefix
, gdb_stdlog
);
1950 prev_prefix
= prefix
;
1951 prev_suffix
= suffix
;
1953 /* Output characters in a printable format. */
1954 while ((ch
= *string
++) != '\0')
1960 fputc_unfiltered (ch
, gdb_stdlog
);
1963 fprintf_unfiltered (gdb_stdlog
, "\\x%02x", ch
& 0xff);
1967 fputs_unfiltered ("\\\\", gdb_stdlog
);
1970 fputs_unfiltered ("\\b", gdb_stdlog
);
1973 fputs_unfiltered ("\\f", gdb_stdlog
);
1977 fputs_unfiltered ("\\n", gdb_stdlog
);
1980 fputs_unfiltered ("\\r", gdb_stdlog
);
1983 fputs_unfiltered ("\\t", gdb_stdlog
);
1986 fputs_unfiltered ("\\v", gdb_stdlog
);
1990 return_p
= ch
== '\r';
1993 /* Print suffix if we printed a newline. */
1996 fputs_unfiltered (suffix
, gdb_stdlog
);
1997 fputs_unfiltered ("\n", gdb_stdlog
);
2002 /* Print a variable number of ARGS using format FORMAT. If this
2003 information is going to put the amount written (since the last call
2004 to REINITIALIZE_MORE_FILTER or the last page break) over the page size,
2005 call prompt_for_continue to get the users permision to continue.
2007 Unlike fprintf, this function does not return a value.
2009 We implement three variants, vfprintf (takes a vararg list and stream),
2010 fprintf (takes a stream to write on), and printf (the usual).
2012 Note also that a longjmp to top level may occur in this routine
2013 (since prompt_for_continue may do so) so this routine should not be
2014 called when cleanups are not in place. */
2017 vfprintf_maybe_filtered (struct ui_file
*stream
, const char *format
,
2018 va_list args
, int filter
)
2020 std::string linebuffer
= string_vprintf (format
, args
);
2021 fputs_maybe_filtered (linebuffer
.c_str (), stream
, filter
);
2026 vfprintf_filtered (struct ui_file
*stream
, const char *format
, va_list args
)
2028 vfprintf_maybe_filtered (stream
, format
, args
, 1);
2032 vfprintf_unfiltered (struct ui_file
*stream
, const char *format
, va_list args
)
2034 std::string linebuffer
= string_vprintf (format
, args
);
2035 if (debug_timestamp
&& stream
== gdb_stdlog
)
2037 using namespace std::chrono
;
2040 steady_clock::time_point now
= steady_clock::now ();
2041 seconds s
= duration_cast
<seconds
> (now
.time_since_epoch ());
2042 microseconds us
= duration_cast
<microseconds
> (now
.time_since_epoch () - s
);
2044 len
= linebuffer
.size ();
2045 need_nl
= (len
> 0 && linebuffer
[len
- 1] != '\n');
2047 std::string timestamp
= string_printf ("%ld.%06ld %s%s",
2050 linebuffer
.c_str (),
2051 need_nl
? "\n": "");
2052 fputs_unfiltered (timestamp
.c_str (), stream
);
2055 fputs_unfiltered (linebuffer
.c_str (), stream
);
2059 vprintf_filtered (const char *format
, va_list args
)
2061 vfprintf_maybe_filtered (gdb_stdout
, format
, args
, 1);
2065 vprintf_unfiltered (const char *format
, va_list args
)
2067 vfprintf_unfiltered (gdb_stdout
, format
, args
);
2071 fprintf_filtered (struct ui_file
*stream
, const char *format
, ...)
2075 va_start (args
, format
);
2076 vfprintf_filtered (stream
, format
, args
);
2081 fprintf_unfiltered (struct ui_file
*stream
, const char *format
, ...)
2085 va_start (args
, format
);
2086 vfprintf_unfiltered (stream
, format
, args
);
2090 /* Like fprintf_filtered, but prints its result indented.
2091 Called as fprintfi_filtered (spaces, stream, format, ...); */
2094 fprintfi_filtered (int spaces
, struct ui_file
*stream
, const char *format
,
2099 va_start (args
, format
);
2100 print_spaces_filtered (spaces
, stream
);
2102 vfprintf_filtered (stream
, format
, args
);
2109 fprintf_styled (struct ui_file
*stream
, const ui_file_style
&style
,
2110 const char *format
, ...)
2114 set_output_style (stream
, style
);
2115 va_start (args
, format
);
2116 vfprintf_filtered (stream
, format
, args
);
2118 set_output_style (stream
, ui_file_style ());
2123 printf_filtered (const char *format
, ...)
2127 va_start (args
, format
);
2128 vfprintf_filtered (gdb_stdout
, format
, args
);
2134 printf_unfiltered (const char *format
, ...)
2138 va_start (args
, format
);
2139 vfprintf_unfiltered (gdb_stdout
, format
, args
);
2143 /* Like printf_filtered, but prints it's result indented.
2144 Called as printfi_filtered (spaces, format, ...); */
2147 printfi_filtered (int spaces
, const char *format
, ...)
2151 va_start (args
, format
);
2152 print_spaces_filtered (spaces
, gdb_stdout
);
2153 vfprintf_filtered (gdb_stdout
, format
, args
);
2157 /* Easy -- but watch out!
2159 This routine is *not* a replacement for puts()! puts() appends a newline.
2160 This one doesn't, and had better not! */
2163 puts_filtered (const char *string
)
2165 fputs_filtered (string
, gdb_stdout
);
2169 puts_unfiltered (const char *string
)
2171 fputs_unfiltered (string
, gdb_stdout
);
2174 /* Return a pointer to N spaces and a null. The pointer is good
2175 until the next call to here. */
2180 static char *spaces
= 0;
2181 static int max_spaces
= -1;
2187 spaces
= (char *) xmalloc (n
+ 1);
2188 for (t
= spaces
+ n
; t
!= spaces
;)
2194 return spaces
+ max_spaces
- n
;
2197 /* Print N spaces. */
2199 print_spaces_filtered (int n
, struct ui_file
*stream
)
2201 fputs_filtered (n_spaces (n
), stream
);
2204 /* C++/ObjC demangler stuff. */
2206 /* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language
2207 LANG, using demangling args ARG_MODE, and print it filtered to STREAM.
2208 If the name is not mangled, or the language for the name is unknown, or
2209 demangling is off, the name is printed in its "raw" form. */
2212 fprintf_symbol_filtered (struct ui_file
*stream
, const char *name
,
2213 enum language lang
, int arg_mode
)
2219 /* If user wants to see raw output, no problem. */
2222 fputs_filtered (name
, stream
);
2226 demangled
= language_demangle (language_def (lang
), name
, arg_mode
);
2227 fputs_filtered (demangled
? demangled
: name
, stream
);
2228 if (demangled
!= NULL
)
2236 /* True if CH is a character that can be part of a symbol name. I.e.,
2237 either a number, a letter, or a '_'. */
2240 valid_identifier_name_char (int ch
)
2242 return (isalnum (ch
) || ch
== '_');
2245 /* Skip to end of token, or to END, whatever comes first. Input is
2246 assumed to be a C++ operator name. */
2249 cp_skip_operator_token (const char *token
, const char *end
)
2251 const char *p
= token
;
2252 while (p
!= end
&& !isspace (*p
) && *p
!= '(')
2254 if (valid_identifier_name_char (*p
))
2256 while (p
!= end
&& valid_identifier_name_char (*p
))
2262 /* Note, ordered such that among ops that share a prefix,
2263 longer comes first. This is so that the loop below can
2264 bail on first match. */
2265 static const char *ops
[] =
2271 "-=", "--", "->", "-",
2280 "<<=", "<=", "<<", "<",
2281 ">>=", ">=", ">>", ">",
2285 for (const char *op
: ops
)
2287 size_t oplen
= strlen (op
);
2288 size_t lencmp
= std::min
<size_t> (oplen
, end
- p
);
2290 if (strncmp (p
, op
, lencmp
) == 0)
2293 /* Some unidentified character. Return it. */
2301 /* Advance STRING1/STRING2 past whitespace. */
2304 skip_ws (const char *&string1
, const char *&string2
, const char *end_str2
)
2306 while (isspace (*string1
))
2308 while (string2
< end_str2
&& isspace (*string2
))
2312 /* True if STRING points at the start of a C++ operator name. START
2313 is the start of the string that STRING points to, hence when
2314 reading backwards, we must not read any character before START. */
2317 cp_is_operator (const char *string
, const char *start
)
2319 return ((string
== start
2320 || !valid_identifier_name_char (string
[-1]))
2321 && strncmp (string
, CP_OPERATOR_STR
, CP_OPERATOR_LEN
) == 0
2322 && !valid_identifier_name_char (string
[CP_OPERATOR_LEN
]));
2325 /* If *NAME points at an ABI tag, skip it and return true. Otherwise
2326 leave *NAME unmodified and return false. (see GCC's abi_tag
2327 attribute), such names are demangled as e.g.,
2328 "function[abi:cxx11]()". */
2331 skip_abi_tag (const char **name
)
2333 const char *p
= *name
;
2335 if (startswith (p
, "[abi:"))
2339 while (valid_identifier_name_char (*p
))
2355 strncmp_iw_with_mode (const char *string1
, const char *string2
,
2356 size_t string2_len
, strncmp_iw_mode mode
,
2357 enum language language
,
2358 completion_match_for_lcd
*match_for_lcd
)
2360 const char *string1_start
= string1
;
2361 const char *end_str2
= string2
+ string2_len
;
2362 bool skip_spaces
= true;
2363 bool have_colon_op
= (language
== language_cplus
2364 || language
== language_rust
2365 || language
== language_fortran
);
2370 || ((isspace (*string1
) && !valid_identifier_name_char (*string2
))
2371 || (isspace (*string2
) && !valid_identifier_name_char (*string1
))))
2373 skip_ws (string1
, string2
, end_str2
);
2374 skip_spaces
= false;
2377 /* Skip [abi:cxx11] tags in the symbol name if the lookup name
2378 doesn't include them. E.g.:
2380 string1: function[abi:cxx1](int)
2383 string1: function[abi:cxx1](int)
2384 string2: function(int)
2386 string1: Struct[abi:cxx1]::function()
2387 string2: Struct::function()
2389 string1: function(Struct[abi:cxx1], int)
2390 string2: function(Struct, int)
2392 if (string2
== end_str2
2393 || (*string2
!= '[' && !valid_identifier_name_char (*string2
)))
2395 const char *abi_start
= string1
;
2397 /* There can be more than one tag. */
2398 while (*string1
== '[' && skip_abi_tag (&string1
))
2401 if (match_for_lcd
!= NULL
&& abi_start
!= string1
)
2402 match_for_lcd
->mark_ignored_range (abi_start
, string1
);
2404 while (isspace (*string1
))
2408 if (*string1
== '\0' || string2
== end_str2
)
2411 /* Handle the :: operator. */
2412 if (have_colon_op
&& string1
[0] == ':' && string1
[1] == ':')
2414 if (*string2
!= ':')
2420 if (string2
== end_str2
)
2423 if (*string2
!= ':')
2429 while (isspace (*string1
))
2431 while (string2
< end_str2
&& isspace (*string2
))
2436 /* Handle C++ user-defined operators. */
2437 else if (language
== language_cplus
2440 if (cp_is_operator (string1
, string1_start
))
2442 /* An operator name in STRING1. Check STRING2. */
2444 = std::min
<size_t> (CP_OPERATOR_LEN
, end_str2
- string2
);
2445 if (strncmp (string1
, string2
, cmplen
) != 0)
2451 if (string2
!= end_str2
)
2453 /* Check for "operatorX" in STRING2. */
2454 if (valid_identifier_name_char (*string2
))
2457 skip_ws (string1
, string2
, end_str2
);
2460 /* Handle operator(). */
2461 if (*string1
== '(')
2463 if (string2
== end_str2
)
2465 if (mode
== strncmp_iw_mode::NORMAL
)
2469 /* Don't break for the regular return at the
2470 bottom, because "operator" should not
2471 match "operator()", since this open
2472 parentheses is not the parameter list
2474 return *string1
!= '\0';
2478 if (*string1
!= *string2
)
2487 skip_ws (string1
, string2
, end_str2
);
2489 /* Skip to end of token, or to END, whatever comes
2491 const char *end_str1
= string1
+ strlen (string1
);
2492 const char *p1
= cp_skip_operator_token (string1
, end_str1
);
2493 const char *p2
= cp_skip_operator_token (string2
, end_str2
);
2495 cmplen
= std::min (p1
- string1
, p2
- string2
);
2498 if (strncmp (string1
, string2
, cmplen
) != 0)
2503 if (p1
- string1
!= p2
- string2
)
2505 if (strncmp (string1
, string2
, cmplen
) != 0)
2512 if (*string1
== '\0' || string2
== end_str2
)
2514 if (*string1
== '(' || *string2
== '(')
2522 if (case_sensitivity
== case_sensitive_on
&& *string1
!= *string2
)
2524 if (case_sensitivity
== case_sensitive_off
2525 && (tolower ((unsigned char) *string1
)
2526 != tolower ((unsigned char) *string2
)))
2529 /* If we see any non-whitespace, non-identifier-name character
2530 (any of "()<>*&" etc.), then skip spaces the next time
2532 if (!isspace (*string1
) && !valid_identifier_name_char (*string1
))
2539 if (string2
== end_str2
)
2541 if (mode
== strncmp_iw_mode::NORMAL
)
2543 /* Strip abi tag markers from the matched symbol name.
2544 Usually the ABI marker will be found on function name
2545 (automatically added because the function returns an
2546 object marked with an ABI tag). However, it's also
2547 possible to see a marker in one of the function
2548 parameters, for example.
2550 string2 (lookup name):
2553 function(some_struct[abi:cxx11], int)
2555 and for completion LCD computation we want to say that
2557 function(some_struct, int)
2559 if (match_for_lcd
!= NULL
)
2561 while ((string1
= strstr (string1
, "[abi:")) != NULL
)
2563 const char *abi_start
= string1
;
2565 /* There can be more than one tag. */
2566 while (skip_abi_tag (&string1
) && *string1
== '[')
2569 if (abi_start
!= string1
)
2570 match_for_lcd
->mark_ignored_range (abi_start
, string1
);
2577 return (*string1
!= '\0' && *string1
!= '(');
2586 strncmp_iw (const char *string1
, const char *string2
, size_t string2_len
)
2588 return strncmp_iw_with_mode (string1
, string2
, string2_len
,
2589 strncmp_iw_mode::NORMAL
, language_minimal
);
2595 strcmp_iw (const char *string1
, const char *string2
)
2597 return strncmp_iw_with_mode (string1
, string2
, strlen (string2
),
2598 strncmp_iw_mode::MATCH_PARAMS
, language_minimal
);
2601 /* This is like strcmp except that it ignores whitespace and treats
2602 '(' as the first non-NULL character in terms of ordering. Like
2603 strcmp (and unlike strcmp_iw), it returns negative if STRING1 <
2604 STRING2, 0 if STRING2 = STRING2, and positive if STRING1 > STRING2
2605 according to that ordering.
2607 If a list is sorted according to this function and if you want to
2608 find names in the list that match some fixed NAME according to
2609 strcmp_iw(LIST_ELT, NAME), then the place to start looking is right
2610 where this function would put NAME.
2612 This function must be neutral to the CASE_SENSITIVITY setting as the user
2613 may choose it during later lookup. Therefore this function always sorts
2614 primarily case-insensitively and secondarily case-sensitively.
2616 Here are some examples of why using strcmp to sort is a bad idea:
2620 Say your partial symtab contains: "foo<char *>", "goo". Then, if
2621 we try to do a search for "foo<char*>", strcmp will locate this
2622 after "foo<char *>" and before "goo". Then lookup_partial_symbol
2623 will start looking at strings beginning with "goo", and will never
2624 see the correct match of "foo<char *>".
2626 Parenthesis example:
2628 In practice, this is less like to be an issue, but I'll give it a
2629 shot. Let's assume that '$' is a legitimate character to occur in
2630 symbols. (Which may well even be the case on some systems.) Then
2631 say that the partial symbol table contains "foo$" and "foo(int)".
2632 strcmp will put them in this order, since '$' < '('. Now, if the
2633 user searches for "foo", then strcmp will sort "foo" before "foo$".
2634 Then lookup_partial_symbol will notice that strcmp_iw("foo$",
2635 "foo") is false, so it won't proceed to the actual match of
2636 "foo(int)" with "foo". */
2639 strcmp_iw_ordered (const char *string1
, const char *string2
)
2641 const char *saved_string1
= string1
, *saved_string2
= string2
;
2642 enum case_sensitivity case_pass
= case_sensitive_off
;
2646 /* C1 and C2 are valid only if *string1 != '\0' && *string2 != '\0'.
2647 Provide stub characters if we are already at the end of one of the
2649 char c1
= 'X', c2
= 'X';
2651 while (*string1
!= '\0' && *string2
!= '\0')
2653 while (isspace (*string1
))
2655 while (isspace (*string2
))
2660 case case_sensitive_off
:
2661 c1
= tolower ((unsigned char) *string1
);
2662 c2
= tolower ((unsigned char) *string2
);
2664 case case_sensitive_on
:
2672 if (*string1
!= '\0')
2681 /* Characters are non-equal unless they're both '\0'; we want to
2682 make sure we get the comparison right according to our
2683 comparison in the cases where one of them is '\0' or '('. */
2685 if (*string2
== '\0')
2690 if (*string2
== '\0')
2695 if (*string2
== '\0' || *string2
== '(')
2704 if (case_pass
== case_sensitive_on
)
2707 /* Otherwise the strings were equal in case insensitive way, make
2708 a more fine grained comparison in a case sensitive way. */
2710 case_pass
= case_sensitive_on
;
2711 string1
= saved_string1
;
2712 string2
= saved_string2
;
2719 streq (const char *lhs
, const char *rhs
)
2721 return !strcmp (lhs
, rhs
);
2727 streq_hash (const void *lhs
, const void *rhs
)
2729 return streq ((const char *) lhs
, (const char *) rhs
);
2736 ** Answer whether string_to_compare is a full or partial match to
2737 ** template_string. The partial match must be in sequence starting
2741 subset_compare (const char *string_to_compare
, const char *template_string
)
2745 if (template_string
!= (char *) NULL
&& string_to_compare
!= (char *) NULL
2746 && strlen (string_to_compare
) <= strlen (template_string
))
2748 (startswith (template_string
, string_to_compare
));
2755 show_debug_timestamp (struct ui_file
*file
, int from_tty
,
2756 struct cmd_list_element
*c
, const char *value
)
2758 fprintf_filtered (file
, _("Timestamping debugging messages is %s.\n"),
2764 initialize_utils (void)
2766 add_setshow_uinteger_cmd ("width", class_support
, &chars_per_line
, _("\
2767 Set number of characters where GDB should wrap lines of its output."), _("\
2768 Show number of characters where GDB should wrap lines of its output."), _("\
2769 This affects where GDB wraps its output to fit the screen width.\n\
2770 Setting this to \"unlimited\" or zero prevents GDB from wrapping its output."),
2772 show_chars_per_line
,
2773 &setlist
, &showlist
);
2775 add_setshow_uinteger_cmd ("height", class_support
, &lines_per_page
, _("\
2776 Set number of lines in a page for GDB output pagination."), _("\
2777 Show number of lines in a page for GDB output pagination."), _("\
2778 This affects the number of lines after which GDB will pause\n\
2779 its output and ask you whether to continue.\n\
2780 Setting this to \"unlimited\" or zero causes GDB never pause during output."),
2782 show_lines_per_page
,
2783 &setlist
, &showlist
);
2785 add_setshow_boolean_cmd ("pagination", class_support
,
2786 &pagination_enabled
, _("\
2787 Set state of GDB output pagination."), _("\
2788 Show state of GDB output pagination."), _("\
2789 When pagination is ON, GDB pauses at end of each screenful of\n\
2790 its output and asks you whether to continue.\n\
2791 Turning pagination off is an alternative to \"set height unlimited\"."),
2793 show_pagination_enabled
,
2794 &setlist
, &showlist
);
2796 add_setshow_boolean_cmd ("sevenbit-strings", class_support
,
2797 &sevenbit_strings
, _("\
2798 Set printing of 8-bit characters in strings as \\nnn."), _("\
2799 Show printing of 8-bit characters in strings as \\nnn."), NULL
,
2801 show_sevenbit_strings
,
2802 &setprintlist
, &showprintlist
);
2804 add_setshow_boolean_cmd ("timestamp", class_maintenance
,
2805 &debug_timestamp
, _("\
2806 Set timestamping of debugging messages."), _("\
2807 Show timestamping of debugging messages."), _("\
2808 When set, debugging messages will be marked with seconds and microseconds."),
2810 show_debug_timestamp
,
2811 &setdebuglist
, &showdebuglist
);
2817 address_significant (gdbarch
*gdbarch
, CORE_ADDR addr
)
2819 /* Clear insignificant bits of a target address and sign extend resulting
2820 address, avoiding shifts larger or equal than the width of a CORE_ADDR.
2821 The local variable ADDR_BIT stops the compiler reporting a shift overflow
2822 when it won't occur. Skip updating of target address if current target
2823 has not set gdbarch significant_addr_bit. */
2824 int addr_bit
= gdbarch_significant_addr_bit (gdbarch
);
2826 if (addr_bit
&& (addr_bit
< (sizeof (CORE_ADDR
) * HOST_CHAR_BIT
)))
2828 CORE_ADDR sign
= (CORE_ADDR
) 1 << (addr_bit
- 1);
2829 addr
&= ((CORE_ADDR
) 1 << addr_bit
) - 1;
2830 addr
= (addr
^ sign
) - sign
;
2837 paddress (struct gdbarch
*gdbarch
, CORE_ADDR addr
)
2839 /* Truncate address to the size of a target address, avoiding shifts
2840 larger or equal than the width of a CORE_ADDR. The local
2841 variable ADDR_BIT stops the compiler reporting a shift overflow
2842 when it won't occur. */
2843 /* NOTE: This assumes that the significant address information is
2844 kept in the least significant bits of ADDR - the upper bits were
2845 either zero or sign extended. Should gdbarch_address_to_pointer or
2846 some ADDRESS_TO_PRINTABLE() be used to do the conversion? */
2848 int addr_bit
= gdbarch_addr_bit (gdbarch
);
2850 if (addr_bit
< (sizeof (CORE_ADDR
) * HOST_CHAR_BIT
))
2851 addr
&= ((CORE_ADDR
) 1 << addr_bit
) - 1;
2852 return hex_string (addr
);
2855 /* This function is described in "defs.h". */
2858 print_core_address (struct gdbarch
*gdbarch
, CORE_ADDR address
)
2860 int addr_bit
= gdbarch_addr_bit (gdbarch
);
2862 if (addr_bit
< (sizeof (CORE_ADDR
) * HOST_CHAR_BIT
))
2863 address
&= ((CORE_ADDR
) 1 << addr_bit
) - 1;
2865 /* FIXME: cagney/2002-05-03: Need local_address_string() function
2866 that returns the language localized string formatted to a width
2867 based on gdbarch_addr_bit. */
2869 return hex_string_custom (address
, 8);
2871 return hex_string_custom (address
, 16);
2874 /* Callback hash_f for htab_create_alloc or htab_create_alloc_ex. */
2877 core_addr_hash (const void *ap
)
2879 const CORE_ADDR
*addrp
= (const CORE_ADDR
*) ap
;
2884 /* Callback eq_f for htab_create_alloc or htab_create_alloc_ex. */
2887 core_addr_eq (const void *ap
, const void *bp
)
2889 const CORE_ADDR
*addr_ap
= (const CORE_ADDR
*) ap
;
2890 const CORE_ADDR
*addr_bp
= (const CORE_ADDR
*) bp
;
2892 return *addr_ap
== *addr_bp
;
2895 /* Convert a string back into a CORE_ADDR. */
2897 string_to_core_addr (const char *my_string
)
2901 if (my_string
[0] == '0' && tolower (my_string
[1]) == 'x')
2903 /* Assume that it is in hex. */
2906 for (i
= 2; my_string
[i
] != '\0'; i
++)
2908 if (isdigit (my_string
[i
]))
2909 addr
= (my_string
[i
] - '0') + (addr
* 16);
2910 else if (isxdigit (my_string
[i
]))
2911 addr
= (tolower (my_string
[i
]) - 'a' + 0xa) + (addr
* 16);
2913 error (_("invalid hex \"%s\""), my_string
);
2918 /* Assume that it is in decimal. */
2921 for (i
= 0; my_string
[i
] != '\0'; i
++)
2923 if (isdigit (my_string
[i
]))
2924 addr
= (my_string
[i
] - '0') + (addr
* 10);
2926 error (_("invalid decimal \"%s\""), my_string
);
2936 gdb_realpath_check_trailer (const char *input
, const char *trailer
)
2938 gdb::unique_xmalloc_ptr
<char> result
= gdb_realpath (input
);
2940 size_t len
= strlen (result
.get ());
2941 size_t trail_len
= strlen (trailer
);
2943 SELF_CHECK (len
>= trail_len
2944 && strcmp (result
.get () + len
- trail_len
, trailer
) == 0);
2948 gdb_realpath_tests ()
2950 /* A file which contains a directory prefix. */
2951 gdb_realpath_check_trailer ("./xfullpath.exp", "/xfullpath.exp");
2952 /* A file which contains a directory prefix. */
2953 gdb_realpath_check_trailer ("../../defs.h", "/defs.h");
2954 /* A one-character filename. */
2955 gdb_realpath_check_trailer ("./a", "/a");
2956 /* A file in the root directory. */
2957 gdb_realpath_check_trailer ("/root_file_which_should_exist",
2958 "/root_file_which_should_exist");
2959 /* A file which does not have a directory prefix. */
2960 gdb_realpath_check_trailer ("xfullpath.exp", "xfullpath.exp");
2961 /* A one-char filename without any directory prefix. */
2962 gdb_realpath_check_trailer ("a", "a");
2963 /* An empty filename. */
2964 gdb_realpath_check_trailer ("", "");
2967 #endif /* GDB_SELF_TEST */
2969 /* Allocation function for the libiberty hash table which uses an
2970 obstack. The obstack is passed as DATA. */
2973 hashtab_obstack_allocate (void *data
, size_t size
, size_t count
)
2975 size_t total
= size
* count
;
2976 void *ptr
= obstack_alloc ((struct obstack
*) data
, total
);
2978 memset (ptr
, 0, total
);
2982 /* Trivial deallocation function for the libiberty splay tree and hash
2983 table - don't deallocate anything. Rely on later deletion of the
2984 obstack. DATA will be the obstack, although it is not needed
2988 dummy_obstack_deallocate (void *object
, void *data
)
2993 /* Simple, portable version of dirname that does not modify its
2997 ldirname (const char *filename
)
2999 std::string dirname
;
3000 const char *base
= lbasename (filename
);
3002 while (base
> filename
&& IS_DIR_SEPARATOR (base
[-1]))
3005 if (base
== filename
)
3008 dirname
= std::string (filename
, base
- filename
);
3010 /* On DOS based file systems, convert "d:foo" to "d:.", so that we
3011 create "d:./bar" later instead of the (different) "d:/bar". */
3012 if (base
- filename
== 2 && IS_ABSOLUTE_PATH (base
)
3013 && !IS_DIR_SEPARATOR (filename
[0]))
3014 dirname
[base
++ - filename
] = '.';
3022 gdb_argv::reset (const char *s
)
3024 char **argv
= buildargv (s
);
3026 if (s
!= NULL
&& argv
== NULL
)
3034 compare_positive_ints (const void *ap
, const void *bp
)
3036 /* Because we know we're comparing two ints which are positive,
3037 there's no danger of overflow here. */
3038 return * (int *) ap
- * (int *) bp
;
3041 #define AMBIGUOUS_MESS1 ".\nMatching formats:"
3042 #define AMBIGUOUS_MESS2 \
3043 ".\nUse \"set gnutarget format-name\" to specify the format."
3046 gdb_bfd_errmsg (bfd_error_type error_tag
, char **matching
)
3050 /* Check if errmsg just need simple return. */
3051 if (error_tag
!= bfd_error_file_ambiguously_recognized
|| matching
== NULL
)
3052 return bfd_errmsg (error_tag
);
3054 std::string
ret (bfd_errmsg (error_tag
));
3055 ret
+= AMBIGUOUS_MESS1
;
3057 for (p
= matching
; *p
; p
++)
3062 ret
+= AMBIGUOUS_MESS2
;
3069 /* Return ARGS parsed as a valid pid, or throw an error. */
3072 parse_pid_to_attach (const char *args
)
3078 error_no_arg (_("process-id to attach"));
3080 dummy
= (char *) args
;
3081 pid
= strtoul (args
, &dummy
, 0);
3082 /* Some targets don't set errno on errors, grrr! */
3083 if ((pid
== 0 && dummy
== args
) || dummy
!= &args
[strlen (args
)])
3084 error (_("Illegal process-id: %s."), args
);
3089 /* Substitute all occurences of string FROM by string TO in *STRINGP. *STRINGP
3090 must come from xrealloc-compatible allocator and it may be updated. FROM
3091 needs to be delimited by IS_DIR_SEPARATOR or DIRNAME_SEPARATOR (or be
3092 located at the start or end of *STRINGP. */
3095 substitute_path_component (char **stringp
, const char *from
, const char *to
)
3097 char *string
= *stringp
, *s
;
3098 const size_t from_len
= strlen (from
);
3099 const size_t to_len
= strlen (to
);
3103 s
= strstr (s
, from
);
3107 if ((s
== string
|| IS_DIR_SEPARATOR (s
[-1])
3108 || s
[-1] == DIRNAME_SEPARATOR
)
3109 && (s
[from_len
] == '\0' || IS_DIR_SEPARATOR (s
[from_len
])
3110 || s
[from_len
] == DIRNAME_SEPARATOR
))
3115 = (char *) xrealloc (string
, (strlen (string
) + to_len
+ 1));
3117 /* Relocate the current S pointer. */
3118 s
= s
- string
+ string_new
;
3119 string
= string_new
;
3121 /* Replace from by to. */
3122 memmove (&s
[to_len
], &s
[from_len
], strlen (&s
[from_len
]) + 1);
3123 memcpy (s
, to
, to_len
);
3138 /* SIGALRM handler for waitpid_with_timeout. */
3141 sigalrm_handler (int signo
)
3143 /* Nothing to do. */
3148 /* Wrapper to wait for child PID to die with TIMEOUT.
3149 TIMEOUT is the time to stop waiting in seconds.
3150 If TIMEOUT is zero, pass WNOHANG to waitpid.
3151 Returns PID if it was successfully waited for, otherwise -1.
3153 Timeouts are currently implemented with alarm and SIGALRM.
3154 If the host does not support them, this waits "forever".
3155 It would be odd though for a host to have waitpid and not SIGALRM. */
3158 wait_to_die_with_timeout (pid_t pid
, int *status
, int timeout
)
3160 pid_t waitpid_result
;
3162 gdb_assert (pid
> 0);
3163 gdb_assert (timeout
>= 0);
3168 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
3169 struct sigaction sa
, old_sa
;
3171 sa
.sa_handler
= sigalrm_handler
;
3172 sigemptyset (&sa
.sa_mask
);
3174 sigaction (SIGALRM
, &sa
, &old_sa
);
3178 ofunc
= signal (SIGALRM
, sigalrm_handler
);
3184 waitpid_result
= waitpid (pid
, status
, 0);
3188 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
3189 sigaction (SIGALRM
, &old_sa
, NULL
);
3191 signal (SIGALRM
, ofunc
);
3196 waitpid_result
= waitpid (pid
, status
, WNOHANG
);
3198 if (waitpid_result
== pid
)
3204 #endif /* HAVE_WAITPID */
3206 /* Provide fnmatch compatible function for FNM_FILE_NAME matching of host files.
3207 Both FNM_FILE_NAME and FNM_NOESCAPE must be set in FLAGS.
3209 It handles correctly HAVE_DOS_BASED_FILE_SYSTEM and
3210 HAVE_CASE_INSENSITIVE_FILE_SYSTEM. */
3213 gdb_filename_fnmatch (const char *pattern
, const char *string
, int flags
)
3215 gdb_assert ((flags
& FNM_FILE_NAME
) != 0);
3217 /* It is unclear how '\' escaping vs. directory separator should coexist. */
3218 gdb_assert ((flags
& FNM_NOESCAPE
) != 0);
3220 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
3222 char *pattern_slash
, *string_slash
;
3224 /* Replace '\' by '/' in both strings. */
3226 pattern_slash
= (char *) alloca (strlen (pattern
) + 1);
3227 strcpy (pattern_slash
, pattern
);
3228 pattern
= pattern_slash
;
3229 for (; *pattern_slash
!= 0; pattern_slash
++)
3230 if (IS_DIR_SEPARATOR (*pattern_slash
))
3231 *pattern_slash
= '/';
3233 string_slash
= (char *) alloca (strlen (string
) + 1);
3234 strcpy (string_slash
, string
);
3235 string
= string_slash
;
3236 for (; *string_slash
!= 0; string_slash
++)
3237 if (IS_DIR_SEPARATOR (*string_slash
))
3238 *string_slash
= '/';
3240 #endif /* HAVE_DOS_BASED_FILE_SYSTEM */
3242 #ifdef HAVE_CASE_INSENSITIVE_FILE_SYSTEM
3243 flags
|= FNM_CASEFOLD
;
3244 #endif /* HAVE_CASE_INSENSITIVE_FILE_SYSTEM */
3246 return fnmatch (pattern
, string
, flags
);
3249 /* Return the number of path elements in PATH.
3257 count_path_elements (const char *path
)
3260 const char *p
= path
;
3262 if (HAS_DRIVE_SPEC (p
))
3264 p
= STRIP_DRIVE_SPEC (p
);
3270 if (IS_DIR_SEPARATOR (*p
))
3275 /* Backup one if last character is /, unless it's the only one. */
3276 if (p
> path
+ 1 && IS_DIR_SEPARATOR (p
[-1]))
3279 /* Add one for the file name, if present. */
3280 if (p
> path
&& !IS_DIR_SEPARATOR (p
[-1]))
3286 /* Remove N leading path elements from PATH.
3287 N must be non-negative.
3288 If PATH has more than N path elements then return NULL.
3289 If PATH has exactly N path elements then return "".
3290 See count_path_elements for a description of how we do the counting. */
3293 strip_leading_path_elements (const char *path
, int n
)
3296 const char *p
= path
;
3298 gdb_assert (n
>= 0);
3303 if (HAS_DRIVE_SPEC (p
))
3305 p
= STRIP_DRIVE_SPEC (p
);
3311 while (*p
!= '\0' && !IS_DIR_SEPARATOR (*p
))
3329 copy_bitwise (gdb_byte
*dest
, ULONGEST dest_offset
,
3330 const gdb_byte
*source
, ULONGEST source_offset
,
3331 ULONGEST nbits
, int bits_big_endian
)
3333 unsigned int buf
, avail
;
3338 if (bits_big_endian
)
3340 /* Start from the end, then work backwards. */
3341 dest_offset
+= nbits
- 1;
3342 dest
+= dest_offset
/ 8;
3343 dest_offset
= 7 - dest_offset
% 8;
3344 source_offset
+= nbits
- 1;
3345 source
+= source_offset
/ 8;
3346 source_offset
= 7 - source_offset
% 8;
3350 dest
+= dest_offset
/ 8;
3352 source
+= source_offset
/ 8;
3356 /* Fill BUF with DEST_OFFSET bits from the destination and 8 -
3357 SOURCE_OFFSET bits from the source. */
3358 buf
= *(bits_big_endian
? source
-- : source
++) >> source_offset
;
3359 buf
<<= dest_offset
;
3360 buf
|= *dest
& ((1 << dest_offset
) - 1);
3362 /* NBITS: bits yet to be written; AVAIL: BUF's fill level. */
3363 nbits
+= dest_offset
;
3364 avail
= dest_offset
+ 8 - source_offset
;
3366 /* Flush 8 bits from BUF, if appropriate. */
3367 if (nbits
>= 8 && avail
>= 8)
3369 *(bits_big_endian
? dest
-- : dest
++) = buf
;
3375 /* Copy the middle part. */
3378 size_t len
= nbits
/ 8;
3380 /* Use a faster method for byte-aligned copies. */
3383 if (bits_big_endian
)
3387 memcpy (dest
+ 1, source
+ 1, len
);
3391 memcpy (dest
, source
, len
);
3400 buf
|= *(bits_big_endian
? source
-- : source
++) << avail
;
3401 *(bits_big_endian
? dest
-- : dest
++) = buf
;
3408 /* Write the last byte. */
3412 buf
|= *source
<< avail
;
3414 buf
&= (1 << nbits
) - 1;
3415 *dest
= (*dest
& (~0 << nbits
)) | buf
;
3420 _initialize_utils (void)
3422 add_internal_problem_command (&internal_error_problem
);
3423 add_internal_problem_command (&internal_warning_problem
);
3424 add_internal_problem_command (&demangler_warning_problem
);
3427 selftests::register_test ("gdb_realpath", gdb_realpath_tests
);