1 /* General utility routines for GDB, the GNU debugger.
3 Copyright (C) 1986-2018 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "event-top.h"
24 #include "gdbthread.h"
27 #ifdef HAVE_SYS_RESOURCE_H
28 #include <sys/resource.h>
29 #endif /* HAVE_SYS_RESOURCE_H */
32 #include "tui/tui.h" /* For tui_get_command_dimension. */
44 #include "gdb-demangle.h"
45 #include "expression.h"
49 #include "filenames.h"
51 #include "gdb_obstack.h"
57 #include "inferior.h" /* for signed_pointer_to_address */
59 #include "gdb_curses.h"
61 #include "readline/readline.h"
65 #include "gdb_usleep.h"
67 #include "gdb_regex.h"
68 #include "job-control.h"
69 #include "common/selftest.h"
70 #include "common/gdb_optional.h"
71 #include "cp-support.h"
73 #include "common/pathstuff.h"
75 void (*deprecated_error_begin_hook) (void);
77 /* Prototypes for local functions */
79 static void vfprintf_maybe_filtered (struct ui_file *, const char *,
80 va_list, int) ATTRIBUTE_PRINTF (2, 0);
82 static void fputs_maybe_filtered (const char *, struct ui_file *, int);
84 static void prompt_for_continue (void);
86 static void set_screen_size (void);
87 static void set_width (void);
89 /* Time spent in prompt_for_continue in the currently executing command
90 waiting for user to respond.
91 Initialized in make_command_stats_cleanup.
92 Modified in prompt_for_continue and defaulted_query.
93 Used in report_command_stats. */
95 static std::chrono::steady_clock::duration prompt_for_continue_wait_time;
97 /* A flag indicating whether to timestamp debugging messages. */
99 static int debug_timestamp = 0;
101 /* Nonzero means that strings with character values >0x7F should be printed
102 as octal escapes. Zero means just print the value (e.g. it's an
103 international character, and the terminal or window can cope.) */
105 int sevenbit_strings = 0;
107 show_sevenbit_strings (struct ui_file *file, int from_tty,
108 struct cmd_list_element *c, const char *value)
110 fprintf_filtered (file, _("Printing of 8-bit characters "
111 "in strings as \\nnn is %s.\n"),
115 /* String to be printed before warning messages, if any. */
117 const char *warning_pre_print = "\nwarning: ";
119 int pagination_enabled = 1;
121 show_pagination_enabled (struct ui_file *file, int from_tty,
122 struct cmd_list_element *c, const char *value)
124 fprintf_filtered (file, _("State of pagination is %s.\n"), value);
128 /* Cleanup utilities.
130 These are not defined in cleanups.c (nor declared in cleanups.h)
131 because while they use the "cleanup API" they are not part of the
134 /* This function is useful for cleanups.
138 old_chain = make_cleanup (free_current_contents, &foo);
140 to arrange to free the object thus allocated. */
143 free_current_contents (void *ptr)
145 void **location = (void **) ptr;
147 if (location == NULL)
148 internal_error (__FILE__, __LINE__,
149 _("free_current_contents: NULL pointer"));
150 if (*location != NULL)
159 /* Print a warning message. The first argument STRING is the warning
160 message, used as an fprintf format string, the second is the
161 va_list of arguments for that string. A warning is unfiltered (not
162 paginated) so that the user does not need to page through each
163 screen full of warnings when there are lots of them. */
166 vwarning (const char *string, va_list args)
168 if (deprecated_warning_hook)
169 (*deprecated_warning_hook) (string, args);
172 gdb::optional<target_terminal::scoped_restore_terminal_state> term_state;
173 if (target_supports_terminal_ours ())
175 term_state.emplace ();
176 target_terminal::ours_for_output ();
178 if (filtered_printing_initialized ())
179 wrap_here (""); /* Force out any buffered output. */
180 gdb_flush (gdb_stdout);
181 if (warning_pre_print)
182 fputs_unfiltered (warning_pre_print, gdb_stderr);
183 vfprintf_unfiltered (gdb_stderr, string, args);
184 fprintf_unfiltered (gdb_stderr, "\n");
188 /* Print an error message and return to command level.
189 The first argument STRING is the error message, used as a fprintf string,
190 and the remaining args are passed as arguments to it. */
193 verror (const char *string, va_list args)
195 throw_verror (GENERIC_ERROR, string, args);
199 error_stream (const string_file &stream)
201 error (("%s"), stream.c_str ());
204 /* Emit a message and abort. */
206 static void ATTRIBUTE_NORETURN
207 abort_with_message (const char *msg)
209 if (current_ui == NULL)
212 fputs_unfiltered (msg, gdb_stderr);
214 abort (); /* NOTE: GDB has only three calls to abort(). */
217 /* Dump core trying to increase the core soft limit to hard limit first. */
222 #ifdef HAVE_SETRLIMIT
223 struct rlimit rlim = { (rlim_t) RLIM_INFINITY, (rlim_t) RLIM_INFINITY };
225 setrlimit (RLIMIT_CORE, &rlim);
226 #endif /* HAVE_SETRLIMIT */
228 abort (); /* NOTE: GDB has only three calls to abort(). */
231 /* Check whether GDB will be able to dump core using the dump_core
232 function. Returns zero if GDB cannot or should not dump core.
233 If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected.
234 If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */
237 can_dump_core (enum resource_limit_kind limit_kind)
239 #ifdef HAVE_GETRLIMIT
242 /* Be quiet and assume we can dump if an error is returned. */
243 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
249 if (rlim.rlim_cur == 0)
254 if (rlim.rlim_max == 0)
257 #endif /* HAVE_GETRLIMIT */
262 /* Print a warning that we cannot dump core. */
265 warn_cant_dump_core (const char *reason)
267 fprintf_unfiltered (gdb_stderr,
268 _("%s\nUnable to dump core, use `ulimit -c"
269 " unlimited' before executing GDB next time.\n"),
273 /* Check whether GDB will be able to dump core using the dump_core
274 function, and print a warning if we cannot. */
277 can_dump_core_warn (enum resource_limit_kind limit_kind,
280 int core_dump_allowed = can_dump_core (limit_kind);
282 if (!core_dump_allowed)
283 warn_cant_dump_core (reason);
285 return core_dump_allowed;
288 /* Allow the user to configure the debugger behavior with respect to
289 what to do when an internal problem is detected. */
291 const char internal_problem_ask[] = "ask";
292 const char internal_problem_yes[] = "yes";
293 const char internal_problem_no[] = "no";
294 static const char *const internal_problem_modes[] =
296 internal_problem_ask,
297 internal_problem_yes,
302 /* Print a message reporting an internal error/warning. Ask the user
303 if they want to continue, dump core, or just exit. Return
304 something to indicate a quit. */
306 struct internal_problem
309 int user_settable_should_quit;
310 const char *should_quit;
311 int user_settable_should_dump_core;
312 const char *should_dump_core;
315 /* Report a problem, internal to GDB, to the user. Once the problem
316 has been reported, and assuming GDB didn't quit, the caller can
317 either allow execution to resume or throw an error. */
319 static void ATTRIBUTE_PRINTF (4, 0)
320 internal_vproblem (struct internal_problem *problem,
321 const char *file, int line, const char *fmt, va_list ap)
328 /* Don't allow infinite error/warning recursion. */
330 static char msg[] = "Recursive internal problem.\n";
339 abort_with_message (msg);
342 /* Newer GLIBC versions put the warn_unused_result attribute
343 on write, but this is one of those rare cases where
344 ignoring the return value is correct. Casting to (void)
345 does not fix this problem. This is the solution suggested
346 at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509. */
347 if (write (STDERR_FILENO, msg, sizeof (msg)) != sizeof (msg))
348 abort (); /* NOTE: GDB has only three calls to abort(). */
353 /* Create a string containing the full error/warning message. Need
354 to call query with this full string, as otherwize the reason
355 (error/warning) and question become separated. Format using a
356 style similar to a compiler error message. Include extra detail
357 so that the user knows that they are living on the edge. */
359 std::string msg = string_vprintf (fmt, ap);
360 reason = string_printf ("%s:%d: %s: %s\n"
361 "A problem internal to GDB has been detected,\n"
362 "further debugging may prove unreliable.",
363 file, line, problem->name, msg.c_str ());
366 /* Fall back to abort_with_message if gdb_stderr is not set up. */
367 if (current_ui == NULL)
369 fputs (reason.c_str (), stderr);
370 abort_with_message ("\n");
373 /* Try to get the message out and at the start of a new line. */
374 gdb::optional<target_terminal::scoped_restore_terminal_state> term_state;
375 if (target_supports_terminal_ours ())
377 term_state.emplace ();
378 target_terminal::ours_for_output ();
380 if (filtered_printing_initialized ())
383 /* Emit the message unless query will emit it below. */
384 if (problem->should_quit != internal_problem_ask
386 || !filtered_printing_initialized ())
387 fprintf_unfiltered (gdb_stderr, "%s\n", reason.c_str ());
389 if (problem->should_quit == internal_problem_ask)
391 /* Default (yes/batch case) is to quit GDB. When in batch mode
392 this lessens the likelihood of GDB going into an infinite
394 if (!confirm || !filtered_printing_initialized ())
397 quit_p = query (_("%s\nQuit this debugging session? "),
400 else if (problem->should_quit == internal_problem_yes)
402 else if (problem->should_quit == internal_problem_no)
405 internal_error (__FILE__, __LINE__, _("bad switch"));
407 fputs_unfiltered (_("\nThis is a bug, please report it."), gdb_stderr);
408 if (REPORT_BUGS_TO[0])
409 fprintf_unfiltered (gdb_stderr, _(" For instructions, see:\n%s."),
411 fputs_unfiltered ("\n\n", gdb_stderr);
413 if (problem->should_dump_core == internal_problem_ask)
415 if (!can_dump_core_warn (LIMIT_MAX, reason.c_str ()))
417 else if (!filtered_printing_initialized ())
421 /* Default (yes/batch case) is to dump core. This leaves a GDB
422 `dropping' so that it is easier to see that something went
424 dump_core_p = query (_("%s\nCreate a core file of GDB? "),
428 else if (problem->should_dump_core == internal_problem_yes)
429 dump_core_p = can_dump_core_warn (LIMIT_MAX, reason.c_str ());
430 else if (problem->should_dump_core == internal_problem_no)
433 internal_error (__FILE__, __LINE__, _("bad switch"));
446 #ifdef HAVE_WORKING_FORK
456 static struct internal_problem internal_error_problem = {
457 "internal-error", 1, internal_problem_ask, 1, internal_problem_ask
461 internal_verror (const char *file, int line, const char *fmt, va_list ap)
463 internal_vproblem (&internal_error_problem, file, line, fmt, ap);
464 throw_quit (_("Command aborted."));
467 static struct internal_problem internal_warning_problem = {
468 "internal-warning", 1, internal_problem_ask, 1, internal_problem_ask
472 internal_vwarning (const char *file, int line, const char *fmt, va_list ap)
474 internal_vproblem (&internal_warning_problem, file, line, fmt, ap);
477 static struct internal_problem demangler_warning_problem = {
478 "demangler-warning", 1, internal_problem_ask, 0, internal_problem_no
482 demangler_vwarning (const char *file, int line, const char *fmt, va_list ap)
484 internal_vproblem (&demangler_warning_problem, file, line, fmt, ap);
488 demangler_warning (const char *file, int line, const char *string, ...)
492 va_start (ap, string);
493 demangler_vwarning (file, line, string, ap);
497 /* Dummy functions to keep add_prefix_cmd happy. */
500 set_internal_problem_cmd (const char *args, int from_tty)
505 show_internal_problem_cmd (const char *args, int from_tty)
509 /* When GDB reports an internal problem (error or warning) it gives
510 the user the opportunity to quit GDB and/or create a core file of
511 the current debug session. This function registers a few commands
512 that make it possible to specify that GDB should always or never
513 quit or create a core file, without asking. The commands look
516 maint set PROBLEM-NAME quit ask|yes|no
517 maint show PROBLEM-NAME quit
518 maint set PROBLEM-NAME corefile ask|yes|no
519 maint show PROBLEM-NAME corefile
521 Where PROBLEM-NAME is currently "internal-error" or
522 "internal-warning". */
525 add_internal_problem_command (struct internal_problem *problem)
527 struct cmd_list_element **set_cmd_list;
528 struct cmd_list_element **show_cmd_list;
532 set_cmd_list = XNEW (struct cmd_list_element *);
533 show_cmd_list = XNEW (struct cmd_list_element *);
534 *set_cmd_list = NULL;
535 *show_cmd_list = NULL;
537 set_doc = xstrprintf (_("Configure what GDB does when %s is detected."),
540 show_doc = xstrprintf (_("Show what GDB does when %s is detected."),
543 add_prefix_cmd (problem->name,
544 class_maintenance, set_internal_problem_cmd, set_doc,
546 concat ("maintenance set ", problem->name, " ",
548 0/*allow-unknown*/, &maintenance_set_cmdlist);
550 add_prefix_cmd (problem->name,
551 class_maintenance, show_internal_problem_cmd, show_doc,
553 concat ("maintenance show ", problem->name, " ",
555 0/*allow-unknown*/, &maintenance_show_cmdlist);
557 if (problem->user_settable_should_quit)
559 set_doc = xstrprintf (_("Set whether GDB should quit "
560 "when an %s is detected"),
562 show_doc = xstrprintf (_("Show whether GDB will quit "
563 "when an %s is detected"),
565 add_setshow_enum_cmd ("quit", class_maintenance,
566 internal_problem_modes,
567 &problem->should_quit,
580 if (problem->user_settable_should_dump_core)
582 set_doc = xstrprintf (_("Set whether GDB should create a core "
583 "file of GDB when %s is detected"),
585 show_doc = xstrprintf (_("Show whether GDB will create a core "
586 "file of GDB when %s is detected"),
588 add_setshow_enum_cmd ("corefile", class_maintenance,
589 internal_problem_modes,
590 &problem->should_dump_core,
604 /* Return a newly allocated string, containing the PREFIX followed
605 by the system error message for errno (separated by a colon). */
608 perror_string (const char *prefix)
612 err = safe_strerror (errno);
613 return std::string (prefix) + ": " + err;
616 /* Print the system error message for errno, and also mention STRING
617 as the file name for which the error was encountered. Use ERRCODE
618 for the thrown exception. Then return to command level. */
621 throw_perror_with_name (enum errors errcode, const char *string)
623 std::string combined = perror_string (string);
625 /* I understand setting these is a matter of taste. Still, some people
626 may clear errno but not know about bfd_error. Doing this here is not
628 bfd_set_error (bfd_error_no_error);
631 throw_error (errcode, _("%s."), combined.c_str ());
634 /* See throw_perror_with_name, ERRCODE defaults here to GENERIC_ERROR. */
637 perror_with_name (const char *string)
639 throw_perror_with_name (GENERIC_ERROR, string);
642 /* Same as perror_with_name except that it prints a warning instead
643 of throwing an error. */
646 perror_warning_with_name (const char *string)
648 std::string combined = perror_string (string);
649 warning (_("%s"), combined.c_str ());
652 /* Print the system error message for ERRCODE, and also mention STRING
653 as the file name for which the error was encountered. */
656 print_sys_errmsg (const char *string, int errcode)
661 err = safe_strerror (errcode);
662 combined = (char *) alloca (strlen (err) + strlen (string) + 3);
663 strcpy (combined, string);
664 strcat (combined, ": ");
665 strcat (combined, err);
667 /* We want anything which was printed on stdout to come out first, before
669 gdb_flush (gdb_stdout);
670 fprintf_unfiltered (gdb_stderr, "%s.\n", combined);
673 /* Control C eventually causes this to be called, at a convenient time. */
678 if (sync_quit_force_run)
680 sync_quit_force_run = 0;
681 quit_force (NULL, 0);
685 /* No steenking SIGINT will ever be coming our way when the
686 program is resumed. Don't lie. */
690 /* If there is no terminal switching for this target, then we can't
691 possibly get screwed by the lack of job control. */
692 || !target_supports_terminal_ours ())
695 throw_quit ("Quit (expect signal SIGINT when the program is resumed)");
704 if (sync_quit_force_run)
709 if (deprecated_interactive_hook)
710 deprecated_interactive_hook ();
714 /* Called when a memory allocation fails, with the number of bytes of
715 memory requested in SIZE. */
718 malloc_failure (long size)
722 internal_error (__FILE__, __LINE__,
723 _("virtual memory exhausted: can't allocate %ld bytes."),
728 internal_error (__FILE__, __LINE__, _("virtual memory exhausted."));
732 /* My replacement for the read system call.
733 Used like `read' but keeps going if `read' returns too soon. */
736 myread (int desc, char *addr, int len)
743 val = read (desc, addr, len);
755 print_spaces (int n, struct ui_file *file)
757 fputs_unfiltered (n_spaces (n), file);
760 /* Print a host address. */
763 gdb_print_host_address_1 (const void *addr, struct ui_file *stream)
765 fprintf_filtered (stream, "%s", host_address_to_string (addr));
771 make_hex_string (const gdb_byte *data, size_t length)
773 char *result = (char *) xmalloc (length * 2 + 1);
778 for (i = 0; i < length; ++i)
779 p += xsnprintf (p, 3, "%02x", data[i]);
786 /* An RAII class that sets up to handle input and then tears down
787 during destruction. */
789 class scoped_input_handler
793 scoped_input_handler ()
794 : m_quit_handler (&quit_handler, default_quit_handler),
797 target_terminal::ours ();
798 ui_register_input_event_handler (current_ui);
799 if (current_ui->prompt_state == PROMPT_BLOCKED)
803 ~scoped_input_handler ()
806 ui_unregister_input_event_handler (m_ui);
809 DISABLE_COPY_AND_ASSIGN (scoped_input_handler);
813 /* Save and restore the terminal state. */
814 target_terminal::scoped_restore_terminal_state m_term_state;
816 /* Save and restore the quit handler. */
817 scoped_restore_tmpl<quit_handler_ftype *> m_quit_handler;
819 /* The saved UI, if non-NULL. */
825 /* This function supports the query, nquery, and yquery functions.
826 Ask user a y-or-n question and return 0 if answer is no, 1 if
827 answer is yes, or default the answer to the specified default
828 (for yquery or nquery). DEFCHAR may be 'y' or 'n' to provide a
829 default answer, or '\0' for no default.
830 CTLSTR is the control string and should end in "? ". It should
831 not say how to answer, because we do that.
832 ARGS are the arguments passed along with the CTLSTR argument to
835 static int ATTRIBUTE_PRINTF (1, 0)
836 defaulted_query (const char *ctlstr, const char defchar, va_list args)
840 char def_answer, not_def_answer;
841 const char *y_string, *n_string;
843 /* Set up according to which answer is the default. */
848 not_def_answer = 'N';
852 else if (defchar == 'y')
856 not_def_answer = 'N';
864 not_def_answer = 'Y';
869 /* Automatically answer the default value if the user did not want
870 prompts or the command was issued with the server prefix. */
871 if (!confirm || server_command)
874 /* If input isn't coming from the user directly, just say what
875 question we're asking, and then answer the default automatically. This
876 way, important error messages don't get lost when talking to GDB
878 if (current_ui->instream != current_ui->stdin_stream
879 || !input_interactive_p (current_ui)
880 /* Restrict queries to the main UI. */
881 || current_ui != main_ui)
883 target_terminal::scoped_restore_terminal_state term_state;
884 target_terminal::ours_for_output ();
886 vfprintf_filtered (gdb_stdout, ctlstr, args);
888 printf_filtered (_("(%s or %s) [answered %c; "
889 "input not from terminal]\n"),
890 y_string, n_string, def_answer);
891 gdb_flush (gdb_stdout);
896 if (deprecated_query_hook)
898 target_terminal::scoped_restore_terminal_state term_state;
899 return deprecated_query_hook (ctlstr, args);
902 /* Format the question outside of the loop, to avoid reusing args. */
903 std::string question = string_vprintf (ctlstr, args);
905 = string_printf (_("%s%s(%s or %s) %s"),
906 annotation_level > 1 ? "\n\032\032pre-query\n" : "",
907 question.c_str (), y_string, n_string,
908 annotation_level > 1 ? "\n\032\032query\n" : "");
910 /* Used to add duration we waited for user to respond to
911 prompt_for_continue_wait_time. */
912 using namespace std::chrono;
913 steady_clock::time_point prompt_started = steady_clock::now ();
915 scoped_input_handler prepare_input;
919 char *response, answer;
921 gdb_flush (gdb_stdout);
922 response = gdb_readline_wrapper (prompt.c_str ());
924 if (response == NULL) /* C-d */
926 printf_filtered ("EOF [assumed %c]\n", def_answer);
931 answer = response[0];
936 /* Check answer. For the non-default, the user must specify
937 the non-default explicitly. */
938 if (answer == not_def_answer)
943 /* Otherwise, if a default was specified, the user may either
944 specify the required input or have it default by entering
946 if (answer == def_answer
947 || (defchar != '\0' && answer == '\0'))
952 /* Invalid entries are not defaulted and require another selection. */
953 printf_filtered (_("Please answer %s or %s.\n"),
957 /* Add time spend in this routine to prompt_for_continue_wait_time. */
958 prompt_for_continue_wait_time += steady_clock::now () - prompt_started;
960 if (annotation_level > 1)
961 printf_filtered (("\n\032\032post-query\n"));
966 /* Ask user a y-or-n question and return 0 if answer is no, 1 if
967 answer is yes, or 0 if answer is defaulted.
968 Takes three args which are given to printf to print the question.
969 The first, a control string, should end in "? ".
970 It should not say how to answer, because we do that. */
973 nquery (const char *ctlstr, ...)
978 va_start (args, ctlstr);
979 ret = defaulted_query (ctlstr, 'n', args);
984 /* Ask user a y-or-n question and return 0 if answer is no, 1 if
985 answer is yes, or 1 if answer is defaulted.
986 Takes three args which are given to printf to print the question.
987 The first, a control string, should end in "? ".
988 It should not say how to answer, because we do that. */
991 yquery (const char *ctlstr, ...)
996 va_start (args, ctlstr);
997 ret = defaulted_query (ctlstr, 'y', args);
1002 /* Ask user a y-or-n question and return 1 iff answer is yes.
1003 Takes three args which are given to printf to print the question.
1004 The first, a control string, should end in "? ".
1005 It should not say how to answer, because we do that. */
1008 query (const char *ctlstr, ...)
1013 va_start (args, ctlstr);
1014 ret = defaulted_query (ctlstr, '\0', args);
1019 /* A helper for parse_escape that converts a host character to a
1020 target character. C is the host character. If conversion is
1021 possible, then the target character is stored in *TARGET_C and the
1022 function returns 1. Otherwise, the function returns 0. */
1025 host_char_to_target (struct gdbarch *gdbarch, int c, int *target_c)
1030 auto_obstack host_data;
1032 convert_between_encodings (target_charset (gdbarch), host_charset (),
1033 (gdb_byte *) &the_char, 1, 1,
1034 &host_data, translit_none);
1036 if (obstack_object_size (&host_data) == 1)
1039 *target_c = *(char *) obstack_base (&host_data);
1045 /* Parse a C escape sequence. STRING_PTR points to a variable
1046 containing a pointer to the string to parse. That pointer
1047 should point to the character after the \. That pointer
1048 is updated past the characters we use. The value of the
1049 escape sequence is returned.
1051 A negative value means the sequence \ newline was seen,
1052 which is supposed to be equivalent to nothing at all.
1054 If \ is followed by a null character, we return a negative
1055 value and leave the string pointer pointing at the null character.
1057 If \ is followed by 000, we return 0 and leave the string pointer
1058 after the zeros. A value of 0 does not mean end of string. */
1061 parse_escape (struct gdbarch *gdbarch, const char **string_ptr)
1063 int target_char = -2; /* Initialize to avoid GCC warnings. */
1064 int c = *(*string_ptr)++;
1083 int i = host_hex_value (c);
1088 if (isdigit (c) && c != '8' && c != '9')
1092 i += host_hex_value (c);
1128 if (!host_char_to_target (gdbarch, c, &target_char))
1129 error (_("The escape sequence `\\%c' is equivalent to plain `%c',"
1130 " which has no equivalent\nin the `%s' character set."),
1131 c, c, target_charset (gdbarch));
1135 /* Print the character C on STREAM as part of the contents of a literal
1136 string whose delimiter is QUOTER. Note that this routine should only
1137 be called for printing things which are independent of the language
1138 of the program being debugged.
1140 printchar will normally escape backslashes and instances of QUOTER. If
1141 QUOTER is 0, printchar won't escape backslashes or any quoting character.
1142 As a side effect, if you pass the backslash character as the QUOTER,
1143 printchar will escape backslashes as usual, but not any other quoting
1147 printchar (int c, do_fputc_ftype do_fputc, ui_file *stream, int quoter)
1149 c &= 0xFF; /* Avoid sign bit follies */
1151 if (c < 0x20 || /* Low control chars */
1152 (c >= 0x7F && c < 0xA0) || /* DEL, High controls */
1153 (sevenbit_strings && c >= 0x80))
1154 { /* high order bit set */
1155 do_fputc ('\\', stream);
1160 do_fputc ('n', stream);
1163 do_fputc ('b', stream);
1166 do_fputc ('t', stream);
1169 do_fputc ('f', stream);
1172 do_fputc ('r', stream);
1175 do_fputc ('e', stream);
1178 do_fputc ('a', stream);
1182 do_fputc ('0' + ((c >> 6) & 0x7), stream);
1183 do_fputc ('0' + ((c >> 3) & 0x7), stream);
1184 do_fputc ('0' + ((c >> 0) & 0x7), stream);
1191 if (quoter != 0 && (c == '\\' || c == quoter))
1192 do_fputc ('\\', stream);
1193 do_fputc (c, stream);
1197 /* Print the character C on STREAM as part of the contents of a
1198 literal string whose delimiter is QUOTER. Note that these routines
1199 should only be call for printing things which are independent of
1200 the language of the program being debugged. */
1203 fputstr_filtered (const char *str, int quoter, struct ui_file *stream)
1206 printchar (*str++, fputc_filtered, stream, quoter);
1210 fputstr_unfiltered (const char *str, int quoter, struct ui_file *stream)
1213 printchar (*str++, fputc_unfiltered, stream, quoter);
1217 fputstrn_filtered (const char *str, int n, int quoter,
1218 struct ui_file *stream)
1220 for (int i = 0; i < n; i++)
1221 printchar (str[i], fputc_filtered, stream, quoter);
1225 fputstrn_unfiltered (const char *str, int n, int quoter,
1226 do_fputc_ftype do_fputc, struct ui_file *stream)
1228 for (int i = 0; i < n; i++)
1229 printchar (str[i], do_fputc, stream, quoter);
1233 /* Number of lines per page or UINT_MAX if paging is disabled. */
1234 static unsigned int lines_per_page;
1236 show_lines_per_page (struct ui_file *file, int from_tty,
1237 struct cmd_list_element *c, const char *value)
1239 fprintf_filtered (file,
1240 _("Number of lines gdb thinks are in a page is %s.\n"),
1244 /* Number of chars per line or UINT_MAX if line folding is disabled. */
1245 static unsigned int chars_per_line;
1247 show_chars_per_line (struct ui_file *file, int from_tty,
1248 struct cmd_list_element *c, const char *value)
1250 fprintf_filtered (file,
1251 _("Number of characters gdb thinks "
1252 "are in a line is %s.\n"),
1256 /* Current count of lines printed on this page, chars on this line. */
1257 static unsigned int lines_printed, chars_printed;
1259 /* True if pagination is disabled for just one command. */
1261 static bool pagination_disabled_for_command;
1263 /* Buffer and start column of buffered text, for doing smarter word-
1264 wrapping. When someone calls wrap_here(), we start buffering output
1265 that comes through fputs_filtered(). If we see a newline, we just
1266 spit it out and forget about the wrap_here(). If we see another
1267 wrap_here(), we spit it out and remember the newer one. If we see
1268 the end of the line, we spit out a newline, the indent, and then
1269 the buffered output. */
1271 static bool filter_initialized = false;
1273 /* Contains characters which are waiting to be output (they have
1274 already been counted in chars_printed). */
1275 static std::string wrap_buffer;
1277 /* String to indent by if the wrap occurs. Must not be NULL if wrap_column
1279 static const char *wrap_indent;
1281 /* Column number on the screen where wrap_buffer begins, or 0 if wrapping
1282 is not in effect. */
1283 static int wrap_column;
1286 /* Initialize the number of lines per page and chars per line. */
1289 init_page_info (void)
1293 lines_per_page = UINT_MAX;
1294 chars_per_line = UINT_MAX;
1298 if (!tui_get_command_dimension (&chars_per_line, &lines_per_page))
1303 #if defined(__GO32__)
1304 rows = ScreenRows ();
1305 cols = ScreenCols ();
1306 lines_per_page = rows;
1307 chars_per_line = cols;
1309 /* Make sure Readline has initialized its terminal settings. */
1310 rl_reset_terminal (NULL);
1312 /* Get the screen size from Readline. */
1313 rl_get_screen_size (&rows, &cols);
1314 lines_per_page = rows;
1315 chars_per_line = cols;
1317 /* Readline should have fetched the termcap entry for us.
1318 Only try to use tgetnum function if rl_get_screen_size
1319 did not return a useful value. */
1320 if (((rows <= 0) && (tgetnum ((char *) "li") < 0))
1321 /* Also disable paging if inside Emacs. $EMACS was used
1322 before Emacs v25.1, $INSIDE_EMACS is used since then. */
1323 || getenv ("EMACS") || getenv ("INSIDE_EMACS"))
1325 /* The number of lines per page is not mentioned in the terminal
1326 description or EMACS evironment variable is set. This probably
1327 means that paging is not useful, so disable paging. */
1328 lines_per_page = UINT_MAX;
1331 /* If the output is not a terminal, don't paginate it. */
1332 if (!ui_file_isatty (gdb_stdout))
1333 lines_per_page = UINT_MAX;
1337 /* We handle SIGWINCH ourselves. */
1338 rl_catch_sigwinch = 0;
1344 /* Return nonzero if filtered printing is initialized. */
1346 filtered_printing_initialized (void)
1348 return filter_initialized;
1351 set_batch_flag_and_restore_page_info::set_batch_flag_and_restore_page_info ()
1352 : m_save_lines_per_page (lines_per_page),
1353 m_save_chars_per_line (chars_per_line),
1354 m_save_batch_flag (batch_flag)
1360 set_batch_flag_and_restore_page_info::~set_batch_flag_and_restore_page_info ()
1362 batch_flag = m_save_batch_flag;
1363 chars_per_line = m_save_chars_per_line;
1364 lines_per_page = m_save_lines_per_page;
1370 /* Set the screen size based on LINES_PER_PAGE and CHARS_PER_LINE. */
1373 set_screen_size (void)
1375 int rows = lines_per_page;
1376 int cols = chars_per_line;
1384 /* Update Readline's idea of the terminal size. */
1385 rl_set_screen_size (rows, cols);
1388 /* Reinitialize WRAP_BUFFER. */
1393 if (chars_per_line == 0)
1396 wrap_buffer.clear ();
1397 filter_initialized = true;
1401 set_width_command (const char *args, int from_tty, struct cmd_list_element *c)
1408 set_height_command (const char *args, int from_tty, struct cmd_list_element *c)
1416 set_screen_width_and_height (int width, int height)
1418 lines_per_page = height;
1419 chars_per_line = width;
1425 /* Wait, so the user can read what's on the screen. Prompt the user
1426 to continue by pressing RETURN. 'q' is also provided because
1427 telling users what to do in the prompt is more user-friendly than
1428 expecting them to think of Ctrl-C/SIGINT. */
1431 prompt_for_continue (void)
1433 char cont_prompt[120];
1434 /* Used to add duration we waited for user to respond to
1435 prompt_for_continue_wait_time. */
1436 using namespace std::chrono;
1437 steady_clock::time_point prompt_started = steady_clock::now ();
1438 bool disable_pagination = pagination_disabled_for_command;
1440 if (annotation_level > 1)
1441 printf_unfiltered (("\n\032\032pre-prompt-for-continue\n"));
1443 strcpy (cont_prompt,
1444 "--Type <RET> for more, q to quit, "
1445 "c to continue without paging--");
1446 if (annotation_level > 1)
1447 strcat (cont_prompt, "\n\032\032prompt-for-continue\n");
1449 /* We must do this *before* we call gdb_readline_wrapper, else it
1450 will eventually call us -- thinking that we're trying to print
1451 beyond the end of the screen. */
1452 reinitialize_more_filter ();
1454 scoped_input_handler prepare_input;
1456 /* Call gdb_readline_wrapper, not readline, in order to keep an
1457 event loop running. */
1458 gdb::unique_xmalloc_ptr<char> ignore (gdb_readline_wrapper (cont_prompt));
1460 /* Add time spend in this routine to prompt_for_continue_wait_time. */
1461 prompt_for_continue_wait_time += steady_clock::now () - prompt_started;
1463 if (annotation_level > 1)
1464 printf_unfiltered (("\n\032\032post-prompt-for-continue\n"));
1468 char *p = ignore.get ();
1470 while (*p == ' ' || *p == '\t')
1473 /* Do not call quit here; there is no possibility of SIGINT. */
1474 throw_quit ("Quit");
1476 disable_pagination = true;
1479 /* Now we have to do this again, so that GDB will know that it doesn't
1480 need to save the ---Type <return>--- line at the top of the screen. */
1481 reinitialize_more_filter ();
1482 pagination_disabled_for_command = disable_pagination;
1484 dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */
1487 /* Initialize timer to keep track of how long we waited for the user. */
1490 reset_prompt_for_continue_wait_time (void)
1492 using namespace std::chrono;
1494 prompt_for_continue_wait_time = steady_clock::duration::zero ();
1497 /* Fetch the cumulative time spent in prompt_for_continue. */
1499 std::chrono::steady_clock::duration
1500 get_prompt_for_continue_wait_time ()
1502 return prompt_for_continue_wait_time;
1505 /* Reinitialize filter; ie. tell it to reset to original values. */
1508 reinitialize_more_filter (void)
1512 pagination_disabled_for_command = false;
1515 /* Flush the wrap buffer to STREAM, if necessary. */
1518 flush_wrap_buffer (struct ui_file *stream)
1520 if (!wrap_buffer.empty ())
1522 fputs_unfiltered (wrap_buffer.c_str (), stream);
1523 wrap_buffer.clear ();
1527 /* Indicate that if the next sequence of characters overflows the line,
1528 a newline should be inserted here rather than when it hits the end.
1529 If INDENT is non-null, it is a string to be printed to indent the
1530 wrapped part on the next line. INDENT must remain accessible until
1531 the next call to wrap_here() or until a newline is printed through
1534 If the line is already overfull, we immediately print a newline and
1535 the indentation, and disable further wrapping.
1537 If we don't know the width of lines, but we know the page height,
1538 we must not wrap words, but should still keep track of newlines
1539 that were explicitly printed.
1541 INDENT should not contain tabs, as that will mess up the char count
1542 on the next line. FIXME.
1544 This routine is guaranteed to force out any output which has been
1545 squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be
1546 used to force out output from the wrap_buffer. */
1549 wrap_here (const char *indent)
1551 /* This should have been allocated, but be paranoid anyway. */
1552 if (!filter_initialized)
1553 internal_error (__FILE__, __LINE__,
1554 _("failed internal consistency check"));
1556 flush_wrap_buffer (gdb_stdout);
1557 if (chars_per_line == UINT_MAX) /* No line overflow checking. */
1561 else if (chars_printed >= chars_per_line)
1563 puts_filtered ("\n");
1565 puts_filtered (indent);
1570 wrap_column = chars_printed;
1574 wrap_indent = indent;
1578 /* Print input string to gdb_stdout, filtered, with wrap,
1579 arranging strings in columns of n chars. String can be
1580 right or left justified in the column. Never prints
1581 trailing spaces. String should never be longer than
1582 width. FIXME: this could be useful for the EXAMINE
1583 command, which currently doesn't tabulate very well. */
1586 puts_filtered_tabular (char *string, int width, int right)
1592 gdb_assert (chars_per_line > 0);
1593 if (chars_per_line == UINT_MAX)
1595 fputs_filtered (string, gdb_stdout);
1596 fputs_filtered ("\n", gdb_stdout);
1600 if (((chars_printed - 1) / width + 2) * width >= chars_per_line)
1601 fputs_filtered ("\n", gdb_stdout);
1603 if (width >= chars_per_line)
1604 width = chars_per_line - 1;
1606 stringlen = strlen (string);
1608 if (chars_printed > 0)
1609 spaces = width - (chars_printed - 1) % width - 1;
1611 spaces += width - stringlen;
1613 spacebuf = (char *) alloca (spaces + 1);
1614 spacebuf[spaces] = '\0';
1616 spacebuf[spaces] = ' ';
1618 fputs_filtered (spacebuf, gdb_stdout);
1619 fputs_filtered (string, gdb_stdout);
1623 /* Ensure that whatever gets printed next, using the filtered output
1624 commands, starts at the beginning of the line. I.e. if there is
1625 any pending output for the current line, flush it and start a new
1626 line. Otherwise do nothing. */
1631 if (chars_printed > 0)
1633 puts_filtered ("\n");
1638 /* Like fputs but if FILTER is true, pause after every screenful.
1640 Regardless of FILTER can wrap at points other than the final
1641 character of a line.
1643 Unlike fputs, fputs_maybe_filtered does not return a value.
1644 It is OK for LINEBUFFER to be NULL, in which case just don't print
1647 Note that a longjmp to top level may occur in this routine (only if
1648 FILTER is true) (since prompt_for_continue may do so) so this
1649 routine should not be called when cleanups are not in place. */
1652 fputs_maybe_filtered (const char *linebuffer, struct ui_file *stream,
1655 const char *lineptr;
1657 if (linebuffer == 0)
1660 /* Don't do any filtering if it is disabled. */
1661 if (stream != gdb_stdout
1662 || !pagination_enabled
1663 || pagination_disabled_for_command
1665 || (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX)
1666 || top_level_interpreter () == NULL
1667 || top_level_interpreter ()->interp_ui_out ()->is_mi_like_p ())
1669 flush_wrap_buffer (stream);
1670 fputs_unfiltered (linebuffer, stream);
1674 /* Go through and output each character. Show line extension
1675 when this is necessary; prompt user for new page when this is
1678 lineptr = linebuffer;
1681 /* Possible new page. Note that PAGINATION_DISABLED_FOR_COMMAND
1682 might be set during this loop, so we must continue to check
1684 if (filter && (lines_printed >= lines_per_page - 1)
1685 && !pagination_disabled_for_command)
1686 prompt_for_continue ();
1688 while (*lineptr && *lineptr != '\n')
1690 /* Print a single line. */
1691 if (*lineptr == '\t')
1693 wrap_buffer.push_back ('\t');
1694 /* Shifting right by 3 produces the number of tab stops
1695 we have already passed, and then adding one and
1696 shifting left 3 advances to the next tab stop. */
1697 chars_printed = ((chars_printed >> 3) + 1) << 3;
1702 wrap_buffer.push_back (*lineptr);
1707 if (chars_printed >= chars_per_line)
1709 unsigned int save_chars = chars_printed;
1713 /* If we aren't actually wrapping, don't output newline --
1714 if chars_per_line is right, we probably just overflowed
1715 anyway; if it's wrong, let us keep going. */
1717 fputc_unfiltered ('\n', stream);
1719 /* Possible new page. Note that
1720 PAGINATION_DISABLED_FOR_COMMAND might be set during
1721 this loop, so we must continue to check it here. */
1722 if (lines_printed >= lines_per_page - 1
1723 && !pagination_disabled_for_command)
1724 prompt_for_continue ();
1726 /* Now output indentation and wrapped string. */
1729 fputs_unfiltered (wrap_indent, stream);
1730 flush_wrap_buffer (stream);
1731 /* FIXME, this strlen is what prevents wrap_indent from
1732 containing tabs. However, if we recurse to print it
1733 and count its chars, we risk trouble if wrap_indent is
1734 longer than (the user settable) chars_per_line.
1735 Note also that this can set chars_printed > chars_per_line
1736 if we are printing a long string. */
1737 chars_printed = strlen (wrap_indent)
1738 + (save_chars - wrap_column);
1739 wrap_column = 0; /* And disable fancy wrap */
1744 if (*lineptr == '\n')
1747 wrap_here ((char *) 0); /* Spit out chars, cancel
1750 fputc_unfiltered ('\n', stream);
1757 fputs_filtered (const char *linebuffer, struct ui_file *stream)
1759 fputs_maybe_filtered (linebuffer, stream, 1);
1763 putchar_unfiltered (int c)
1767 ui_file_write (gdb_stdout, &buf, 1);
1771 /* Write character C to gdb_stdout using GDB's paging mechanism and return C.
1772 May return nonlocally. */
1775 putchar_filtered (int c)
1777 return fputc_filtered (c, gdb_stdout);
1781 fputc_unfiltered (int c, struct ui_file *stream)
1785 ui_file_write (stream, &buf, 1);
1790 fputc_filtered (int c, struct ui_file *stream)
1796 fputs_filtered (buf, stream);
1800 /* puts_debug is like fputs_unfiltered, except it prints special
1801 characters in printable fashion. */
1804 puts_debug (char *prefix, char *string, char *suffix)
1808 /* Print prefix and suffix after each line. */
1809 static int new_line = 1;
1810 static int return_p = 0;
1811 static const char *prev_prefix = "";
1812 static const char *prev_suffix = "";
1814 if (*string == '\n')
1817 /* If the prefix is changing, print the previous suffix, a new line,
1818 and the new prefix. */
1819 if ((return_p || (strcmp (prev_prefix, prefix) != 0)) && !new_line)
1821 fputs_unfiltered (prev_suffix, gdb_stdlog);
1822 fputs_unfiltered ("\n", gdb_stdlog);
1823 fputs_unfiltered (prefix, gdb_stdlog);
1826 /* Print prefix if we printed a newline during the previous call. */
1830 fputs_unfiltered (prefix, gdb_stdlog);
1833 prev_prefix = prefix;
1834 prev_suffix = suffix;
1836 /* Output characters in a printable format. */
1837 while ((ch = *string++) != '\0')
1843 fputc_unfiltered (ch, gdb_stdlog);
1846 fprintf_unfiltered (gdb_stdlog, "\\x%02x", ch & 0xff);
1850 fputs_unfiltered ("\\\\", gdb_stdlog);
1853 fputs_unfiltered ("\\b", gdb_stdlog);
1856 fputs_unfiltered ("\\f", gdb_stdlog);
1860 fputs_unfiltered ("\\n", gdb_stdlog);
1863 fputs_unfiltered ("\\r", gdb_stdlog);
1866 fputs_unfiltered ("\\t", gdb_stdlog);
1869 fputs_unfiltered ("\\v", gdb_stdlog);
1873 return_p = ch == '\r';
1876 /* Print suffix if we printed a newline. */
1879 fputs_unfiltered (suffix, gdb_stdlog);
1880 fputs_unfiltered ("\n", gdb_stdlog);
1885 /* Print a variable number of ARGS using format FORMAT. If this
1886 information is going to put the amount written (since the last call
1887 to REINITIALIZE_MORE_FILTER or the last page break) over the page size,
1888 call prompt_for_continue to get the users permision to continue.
1890 Unlike fprintf, this function does not return a value.
1892 We implement three variants, vfprintf (takes a vararg list and stream),
1893 fprintf (takes a stream to write on), and printf (the usual).
1895 Note also that a longjmp to top level may occur in this routine
1896 (since prompt_for_continue may do so) so this routine should not be
1897 called when cleanups are not in place. */
1900 vfprintf_maybe_filtered (struct ui_file *stream, const char *format,
1901 va_list args, int filter)
1903 std::string linebuffer = string_vprintf (format, args);
1904 fputs_maybe_filtered (linebuffer.c_str (), stream, filter);
1909 vfprintf_filtered (struct ui_file *stream, const char *format, va_list args)
1911 vfprintf_maybe_filtered (stream, format, args, 1);
1915 vfprintf_unfiltered (struct ui_file *stream, const char *format, va_list args)
1917 std::string linebuffer = string_vprintf (format, args);
1918 if (debug_timestamp && stream == gdb_stdlog)
1920 using namespace std::chrono;
1923 steady_clock::time_point now = steady_clock::now ();
1924 seconds s = duration_cast<seconds> (now.time_since_epoch ());
1925 microseconds us = duration_cast<microseconds> (now.time_since_epoch () - s);
1927 len = linebuffer.size ();
1928 need_nl = (len > 0 && linebuffer[len - 1] != '\n');
1930 std::string timestamp = string_printf ("%ld.%06ld %s%s",
1933 linebuffer.c_str (),
1934 need_nl ? "\n": "");
1935 fputs_unfiltered (timestamp.c_str (), stream);
1938 fputs_unfiltered (linebuffer.c_str (), stream);
1942 vprintf_filtered (const char *format, va_list args)
1944 vfprintf_maybe_filtered (gdb_stdout, format, args, 1);
1948 vprintf_unfiltered (const char *format, va_list args)
1950 vfprintf_unfiltered (gdb_stdout, format, args);
1954 fprintf_filtered (struct ui_file *stream, const char *format, ...)
1958 va_start (args, format);
1959 vfprintf_filtered (stream, format, args);
1964 fprintf_unfiltered (struct ui_file *stream, const char *format, ...)
1968 va_start (args, format);
1969 vfprintf_unfiltered (stream, format, args);
1973 /* Like fprintf_filtered, but prints its result indented.
1974 Called as fprintfi_filtered (spaces, stream, format, ...); */
1977 fprintfi_filtered (int spaces, struct ui_file *stream, const char *format,
1982 va_start (args, format);
1983 print_spaces_filtered (spaces, stream);
1985 vfprintf_filtered (stream, format, args);
1991 printf_filtered (const char *format, ...)
1995 va_start (args, format);
1996 vfprintf_filtered (gdb_stdout, format, args);
2002 printf_unfiltered (const char *format, ...)
2006 va_start (args, format);
2007 vfprintf_unfiltered (gdb_stdout, format, args);
2011 /* Like printf_filtered, but prints it's result indented.
2012 Called as printfi_filtered (spaces, format, ...); */
2015 printfi_filtered (int spaces, const char *format, ...)
2019 va_start (args, format);
2020 print_spaces_filtered (spaces, gdb_stdout);
2021 vfprintf_filtered (gdb_stdout, format, args);
2025 /* Easy -- but watch out!
2027 This routine is *not* a replacement for puts()! puts() appends a newline.
2028 This one doesn't, and had better not! */
2031 puts_filtered (const char *string)
2033 fputs_filtered (string, gdb_stdout);
2037 puts_unfiltered (const char *string)
2039 fputs_unfiltered (string, gdb_stdout);
2042 /* Return a pointer to N spaces and a null. The pointer is good
2043 until the next call to here. */
2048 static char *spaces = 0;
2049 static int max_spaces = -1;
2055 spaces = (char *) xmalloc (n + 1);
2056 for (t = spaces + n; t != spaces;)
2062 return spaces + max_spaces - n;
2065 /* Print N spaces. */
2067 print_spaces_filtered (int n, struct ui_file *stream)
2069 fputs_filtered (n_spaces (n), stream);
2072 /* C++/ObjC demangler stuff. */
2074 /* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language
2075 LANG, using demangling args ARG_MODE, and print it filtered to STREAM.
2076 If the name is not mangled, or the language for the name is unknown, or
2077 demangling is off, the name is printed in its "raw" form. */
2080 fprintf_symbol_filtered (struct ui_file *stream, const char *name,
2081 enum language lang, int arg_mode)
2087 /* If user wants to see raw output, no problem. */
2090 fputs_filtered (name, stream);
2094 demangled = language_demangle (language_def (lang), name, arg_mode);
2095 fputs_filtered (demangled ? demangled : name, stream);
2096 if (demangled != NULL)
2104 /* True if CH is a character that can be part of a symbol name. I.e.,
2105 either a number, a letter, or a '_'. */
2108 valid_identifier_name_char (int ch)
2110 return (isalnum (ch) || ch == '_');
2113 /* Skip to end of token, or to END, whatever comes first. Input is
2114 assumed to be a C++ operator name. */
2117 cp_skip_operator_token (const char *token, const char *end)
2119 const char *p = token;
2120 while (p != end && !isspace (*p) && *p != '(')
2122 if (valid_identifier_name_char (*p))
2124 while (p != end && valid_identifier_name_char (*p))
2130 /* Note, ordered such that among ops that share a prefix,
2131 longer comes first. This is so that the loop below can
2132 bail on first match. */
2133 static const char *ops[] =
2139 "-=", "--", "->", "-",
2148 "<<=", "<=", "<<", "<",
2149 ">>=", ">=", ">>", ">",
2153 for (const char *op : ops)
2155 size_t oplen = strlen (op);
2156 size_t lencmp = std::min<size_t> (oplen, end - p);
2158 if (strncmp (p, op, lencmp) == 0)
2161 /* Some unidentified character. Return it. */
2169 /* Advance STRING1/STRING2 past whitespace. */
2172 skip_ws (const char *&string1, const char *&string2, const char *end_str2)
2174 while (isspace (*string1))
2176 while (string2 < end_str2 && isspace (*string2))
2180 /* True if STRING points at the start of a C++ operator name. START
2181 is the start of the string that STRING points to, hence when
2182 reading backwards, we must not read any character before START. */
2185 cp_is_operator (const char *string, const char *start)
2187 return ((string == start
2188 || !valid_identifier_name_char (string[-1]))
2189 && strncmp (string, CP_OPERATOR_STR, CP_OPERATOR_LEN) == 0
2190 && !valid_identifier_name_char (string[CP_OPERATOR_LEN]));
2193 /* If *NAME points at an ABI tag, skip it and return true. Otherwise
2194 leave *NAME unmodified and return false. (see GCC's abi_tag
2195 attribute), such names are demangled as e.g.,
2196 "function[abi:cxx11]()". */
2199 skip_abi_tag (const char **name)
2201 const char *p = *name;
2203 if (startswith (p, "[abi:"))
2207 while (valid_identifier_name_char (*p))
2223 strncmp_iw_with_mode (const char *string1, const char *string2,
2224 size_t string2_len, strncmp_iw_mode mode,
2225 enum language language,
2226 completion_match_for_lcd *match_for_lcd)
2228 const char *string1_start = string1;
2229 const char *end_str2 = string2 + string2_len;
2230 bool skip_spaces = true;
2231 bool have_colon_op = (language == language_cplus
2232 || language == language_rust
2233 || language == language_fortran);
2238 || ((isspace (*string1) && !valid_identifier_name_char (*string2))
2239 || (isspace (*string2) && !valid_identifier_name_char (*string1))))
2241 skip_ws (string1, string2, end_str2);
2242 skip_spaces = false;
2245 /* Skip [abi:cxx11] tags in the symbol name if the lookup name
2246 doesn't include them. E.g.:
2248 string1: function[abi:cxx1](int)
2251 string1: function[abi:cxx1](int)
2252 string2: function(int)
2254 string1: Struct[abi:cxx1]::function()
2255 string2: Struct::function()
2257 string1: function(Struct[abi:cxx1], int)
2258 string2: function(Struct, int)
2260 if (string2 == end_str2
2261 || (*string2 != '[' && !valid_identifier_name_char (*string2)))
2263 const char *abi_start = string1;
2265 /* There can be more than one tag. */
2266 while (*string1 == '[' && skip_abi_tag (&string1))
2269 if (match_for_lcd != NULL && abi_start != string1)
2270 match_for_lcd->mark_ignored_range (abi_start, string1);
2272 while (isspace (*string1))
2276 if (*string1 == '\0' || string2 == end_str2)
2279 /* Handle the :: operator. */
2280 if (have_colon_op && string1[0] == ':' && string1[1] == ':')
2282 if (*string2 != ':')
2288 if (string2 == end_str2)
2291 if (*string2 != ':')
2297 while (isspace (*string1))
2299 while (string2 < end_str2 && isspace (*string2))
2304 /* Handle C++ user-defined operators. */
2305 else if (language == language_cplus
2308 if (cp_is_operator (string1, string1_start))
2310 /* An operator name in STRING1. Check STRING2. */
2312 = std::min<size_t> (CP_OPERATOR_LEN, end_str2 - string2);
2313 if (strncmp (string1, string2, cmplen) != 0)
2319 if (string2 != end_str2)
2321 /* Check for "operatorX" in STRING2. */
2322 if (valid_identifier_name_char (*string2))
2325 skip_ws (string1, string2, end_str2);
2328 /* Handle operator(). */
2329 if (*string1 == '(')
2331 if (string2 == end_str2)
2333 if (mode == strncmp_iw_mode::NORMAL)
2337 /* Don't break for the regular return at the
2338 bottom, because "operator" should not
2339 match "operator()", since this open
2340 parentheses is not the parameter list
2342 return *string1 != '\0';
2346 if (*string1 != *string2)
2355 skip_ws (string1, string2, end_str2);
2357 /* Skip to end of token, or to END, whatever comes
2359 const char *end_str1 = string1 + strlen (string1);
2360 const char *p1 = cp_skip_operator_token (string1, end_str1);
2361 const char *p2 = cp_skip_operator_token (string2, end_str2);
2363 cmplen = std::min (p1 - string1, p2 - string2);
2366 if (strncmp (string1, string2, cmplen) != 0)
2371 if (p1 - string1 != p2 - string2)
2373 if (strncmp (string1, string2, cmplen) != 0)
2380 if (*string1 == '\0' || string2 == end_str2)
2382 if (*string1 == '(' || *string2 == '(')
2390 if (case_sensitivity == case_sensitive_on && *string1 != *string2)
2392 if (case_sensitivity == case_sensitive_off
2393 && (tolower ((unsigned char) *string1)
2394 != tolower ((unsigned char) *string2)))
2397 /* If we see any non-whitespace, non-identifier-name character
2398 (any of "()<>*&" etc.), then skip spaces the next time
2400 if (!isspace (*string1) && !valid_identifier_name_char (*string1))
2407 if (string2 == end_str2)
2409 if (mode == strncmp_iw_mode::NORMAL)
2411 /* Strip abi tag markers from the matched symbol name.
2412 Usually the ABI marker will be found on function name
2413 (automatically added because the function returns an
2414 object marked with an ABI tag). However, it's also
2415 possible to see a marker in one of the function
2416 parameters, for example.
2418 string2 (lookup name):
2421 function(some_struct[abi:cxx11], int)
2423 and for completion LCD computation we want to say that
2425 function(some_struct, int)
2427 if (match_for_lcd != NULL)
2429 while ((string1 = strstr (string1, "[abi:")) != NULL)
2431 const char *abi_start = string1;
2433 /* There can be more than one tag. */
2434 while (skip_abi_tag (&string1) && *string1 == '[')
2437 if (abi_start != string1)
2438 match_for_lcd->mark_ignored_range (abi_start, string1);
2445 return (*string1 != '\0' && *string1 != '(');
2454 strncmp_iw (const char *string1, const char *string2, size_t string2_len)
2456 return strncmp_iw_with_mode (string1, string2, string2_len,
2457 strncmp_iw_mode::NORMAL, language_minimal);
2463 strcmp_iw (const char *string1, const char *string2)
2465 return strncmp_iw_with_mode (string1, string2, strlen (string2),
2466 strncmp_iw_mode::MATCH_PARAMS, language_minimal);
2469 /* This is like strcmp except that it ignores whitespace and treats
2470 '(' as the first non-NULL character in terms of ordering. Like
2471 strcmp (and unlike strcmp_iw), it returns negative if STRING1 <
2472 STRING2, 0 if STRING2 = STRING2, and positive if STRING1 > STRING2
2473 according to that ordering.
2475 If a list is sorted according to this function and if you want to
2476 find names in the list that match some fixed NAME according to
2477 strcmp_iw(LIST_ELT, NAME), then the place to start looking is right
2478 where this function would put NAME.
2480 This function must be neutral to the CASE_SENSITIVITY setting as the user
2481 may choose it during later lookup. Therefore this function always sorts
2482 primarily case-insensitively and secondarily case-sensitively.
2484 Here are some examples of why using strcmp to sort is a bad idea:
2488 Say your partial symtab contains: "foo<char *>", "goo". Then, if
2489 we try to do a search for "foo<char*>", strcmp will locate this
2490 after "foo<char *>" and before "goo". Then lookup_partial_symbol
2491 will start looking at strings beginning with "goo", and will never
2492 see the correct match of "foo<char *>".
2494 Parenthesis example:
2496 In practice, this is less like to be an issue, but I'll give it a
2497 shot. Let's assume that '$' is a legitimate character to occur in
2498 symbols. (Which may well even be the case on some systems.) Then
2499 say that the partial symbol table contains "foo$" and "foo(int)".
2500 strcmp will put them in this order, since '$' < '('. Now, if the
2501 user searches for "foo", then strcmp will sort "foo" before "foo$".
2502 Then lookup_partial_symbol will notice that strcmp_iw("foo$",
2503 "foo") is false, so it won't proceed to the actual match of
2504 "foo(int)" with "foo". */
2507 strcmp_iw_ordered (const char *string1, const char *string2)
2509 const char *saved_string1 = string1, *saved_string2 = string2;
2510 enum case_sensitivity case_pass = case_sensitive_off;
2514 /* C1 and C2 are valid only if *string1 != '\0' && *string2 != '\0'.
2515 Provide stub characters if we are already at the end of one of the
2517 char c1 = 'X', c2 = 'X';
2519 while (*string1 != '\0' && *string2 != '\0')
2521 while (isspace (*string1))
2523 while (isspace (*string2))
2528 case case_sensitive_off:
2529 c1 = tolower ((unsigned char) *string1);
2530 c2 = tolower ((unsigned char) *string2);
2532 case case_sensitive_on:
2540 if (*string1 != '\0')
2549 /* Characters are non-equal unless they're both '\0'; we want to
2550 make sure we get the comparison right according to our
2551 comparison in the cases where one of them is '\0' or '('. */
2553 if (*string2 == '\0')
2558 if (*string2 == '\0')
2563 if (*string2 == '\0' || *string2 == '(')
2572 if (case_pass == case_sensitive_on)
2575 /* Otherwise the strings were equal in case insensitive way, make
2576 a more fine grained comparison in a case sensitive way. */
2578 case_pass = case_sensitive_on;
2579 string1 = saved_string1;
2580 string2 = saved_string2;
2587 streq (const char *lhs, const char *rhs)
2589 return !strcmp (lhs, rhs);
2595 streq_hash (const void *lhs, const void *rhs)
2597 return streq ((const char *) lhs, (const char *) rhs);
2604 ** Answer whether string_to_compare is a full or partial match to
2605 ** template_string. The partial match must be in sequence starting
2609 subset_compare (const char *string_to_compare, const char *template_string)
2613 if (template_string != (char *) NULL && string_to_compare != (char *) NULL
2614 && strlen (string_to_compare) <= strlen (template_string))
2616 (startswith (template_string, string_to_compare));
2623 show_debug_timestamp (struct ui_file *file, int from_tty,
2624 struct cmd_list_element *c, const char *value)
2626 fprintf_filtered (file, _("Timestamping debugging messages is %s.\n"),
2632 initialize_utils (void)
2634 add_setshow_uinteger_cmd ("width", class_support, &chars_per_line, _("\
2635 Set number of characters where GDB should wrap lines of its output."), _("\
2636 Show number of characters where GDB should wrap lines of its output."), _("\
2637 This affects where GDB wraps its output to fit the screen width.\n\
2638 Setting this to \"unlimited\" or zero prevents GDB from wrapping its output."),
2640 show_chars_per_line,
2641 &setlist, &showlist);
2643 add_setshow_uinteger_cmd ("height", class_support, &lines_per_page, _("\
2644 Set number of lines in a page for GDB output pagination."), _("\
2645 Show number of lines in a page for GDB output pagination."), _("\
2646 This affects the number of lines after which GDB will pause\n\
2647 its output and ask you whether to continue.\n\
2648 Setting this to \"unlimited\" or zero causes GDB never pause during output."),
2650 show_lines_per_page,
2651 &setlist, &showlist);
2653 add_setshow_boolean_cmd ("pagination", class_support,
2654 &pagination_enabled, _("\
2655 Set state of GDB output pagination."), _("\
2656 Show state of GDB output pagination."), _("\
2657 When pagination is ON, GDB pauses at end of each screenful of\n\
2658 its output and asks you whether to continue.\n\
2659 Turning pagination off is an alternative to \"set height unlimited\"."),
2661 show_pagination_enabled,
2662 &setlist, &showlist);
2664 add_setshow_boolean_cmd ("sevenbit-strings", class_support,
2665 &sevenbit_strings, _("\
2666 Set printing of 8-bit characters in strings as \\nnn."), _("\
2667 Show printing of 8-bit characters in strings as \\nnn."), NULL,
2669 show_sevenbit_strings,
2670 &setprintlist, &showprintlist);
2672 add_setshow_boolean_cmd ("timestamp", class_maintenance,
2673 &debug_timestamp, _("\
2674 Set timestamping of debugging messages."), _("\
2675 Show timestamping of debugging messages."), _("\
2676 When set, debugging messages will be marked with seconds and microseconds."),
2678 show_debug_timestamp,
2679 &setdebuglist, &showdebuglist);
2685 address_significant (gdbarch *gdbarch, CORE_ADDR addr)
2687 /* Clear insignificant bits of a target address and sign extend resulting
2688 address, avoiding shifts larger or equal than the width of a CORE_ADDR.
2689 The local variable ADDR_BIT stops the compiler reporting a shift overflow
2690 when it won't occur. Skip updating of target address if current target
2691 has not set gdbarch significant_addr_bit. */
2692 int addr_bit = gdbarch_significant_addr_bit (gdbarch);
2694 if (addr_bit && (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)))
2696 CORE_ADDR sign = (CORE_ADDR) 1 << (addr_bit - 1);
2697 addr &= ((CORE_ADDR) 1 << addr_bit) - 1;
2698 addr = (addr ^ sign) - sign;
2705 paddress (struct gdbarch *gdbarch, CORE_ADDR addr)
2707 /* Truncate address to the size of a target address, avoiding shifts
2708 larger or equal than the width of a CORE_ADDR. The local
2709 variable ADDR_BIT stops the compiler reporting a shift overflow
2710 when it won't occur. */
2711 /* NOTE: This assumes that the significant address information is
2712 kept in the least significant bits of ADDR - the upper bits were
2713 either zero or sign extended. Should gdbarch_address_to_pointer or
2714 some ADDRESS_TO_PRINTABLE() be used to do the conversion? */
2716 int addr_bit = gdbarch_addr_bit (gdbarch);
2718 if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))
2719 addr &= ((CORE_ADDR) 1 << addr_bit) - 1;
2720 return hex_string (addr);
2723 /* This function is described in "defs.h". */
2726 print_core_address (struct gdbarch *gdbarch, CORE_ADDR address)
2728 int addr_bit = gdbarch_addr_bit (gdbarch);
2730 if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))
2731 address &= ((CORE_ADDR) 1 << addr_bit) - 1;
2733 /* FIXME: cagney/2002-05-03: Need local_address_string() function
2734 that returns the language localized string formatted to a width
2735 based on gdbarch_addr_bit. */
2737 return hex_string_custom (address, 8);
2739 return hex_string_custom (address, 16);
2742 /* Callback hash_f for htab_create_alloc or htab_create_alloc_ex. */
2745 core_addr_hash (const void *ap)
2747 const CORE_ADDR *addrp = (const CORE_ADDR *) ap;
2752 /* Callback eq_f for htab_create_alloc or htab_create_alloc_ex. */
2755 core_addr_eq (const void *ap, const void *bp)
2757 const CORE_ADDR *addr_ap = (const CORE_ADDR *) ap;
2758 const CORE_ADDR *addr_bp = (const CORE_ADDR *) bp;
2760 return *addr_ap == *addr_bp;
2763 /* Convert a string back into a CORE_ADDR. */
2765 string_to_core_addr (const char *my_string)
2769 if (my_string[0] == '0' && tolower (my_string[1]) == 'x')
2771 /* Assume that it is in hex. */
2774 for (i = 2; my_string[i] != '\0'; i++)
2776 if (isdigit (my_string[i]))
2777 addr = (my_string[i] - '0') + (addr * 16);
2778 else if (isxdigit (my_string[i]))
2779 addr = (tolower (my_string[i]) - 'a' + 0xa) + (addr * 16);
2781 error (_("invalid hex \"%s\""), my_string);
2786 /* Assume that it is in decimal. */
2789 for (i = 0; my_string[i] != '\0'; i++)
2791 if (isdigit (my_string[i]))
2792 addr = (my_string[i] - '0') + (addr * 10);
2794 error (_("invalid decimal \"%s\""), my_string);
2804 gdb_realpath_check_trailer (const char *input, const char *trailer)
2806 gdb::unique_xmalloc_ptr<char> result = gdb_realpath (input);
2808 size_t len = strlen (result.get ());
2809 size_t trail_len = strlen (trailer);
2811 SELF_CHECK (len >= trail_len
2812 && strcmp (result.get () + len - trail_len, trailer) == 0);
2816 gdb_realpath_tests ()
2818 /* A file which contains a directory prefix. */
2819 gdb_realpath_check_trailer ("./xfullpath.exp", "/xfullpath.exp");
2820 /* A file which contains a directory prefix. */
2821 gdb_realpath_check_trailer ("../../defs.h", "/defs.h");
2822 /* A one-character filename. */
2823 gdb_realpath_check_trailer ("./a", "/a");
2824 /* A file in the root directory. */
2825 gdb_realpath_check_trailer ("/root_file_which_should_exist",
2826 "/root_file_which_should_exist");
2827 /* A file which does not have a directory prefix. */
2828 gdb_realpath_check_trailer ("xfullpath.exp", "xfullpath.exp");
2829 /* A one-char filename without any directory prefix. */
2830 gdb_realpath_check_trailer ("a", "a");
2831 /* An empty filename. */
2832 gdb_realpath_check_trailer ("", "");
2835 #endif /* GDB_SELF_TEST */
2837 /* Allocation function for the libiberty hash table which uses an
2838 obstack. The obstack is passed as DATA. */
2841 hashtab_obstack_allocate (void *data, size_t size, size_t count)
2843 size_t total = size * count;
2844 void *ptr = obstack_alloc ((struct obstack *) data, total);
2846 memset (ptr, 0, total);
2850 /* Trivial deallocation function for the libiberty splay tree and hash
2851 table - don't deallocate anything. Rely on later deletion of the
2852 obstack. DATA will be the obstack, although it is not needed
2856 dummy_obstack_deallocate (void *object, void *data)
2861 /* Simple, portable version of dirname that does not modify its
2865 ldirname (const char *filename)
2867 std::string dirname;
2868 const char *base = lbasename (filename);
2870 while (base > filename && IS_DIR_SEPARATOR (base[-1]))
2873 if (base == filename)
2876 dirname = std::string (filename, base - filename);
2878 /* On DOS based file systems, convert "d:foo" to "d:.", so that we
2879 create "d:./bar" later instead of the (different) "d:/bar". */
2880 if (base - filename == 2 && IS_ABSOLUTE_PATH (base)
2881 && !IS_DIR_SEPARATOR (filename[0]))
2882 dirname[base++ - filename] = '.';
2890 gdb_argv::reset (const char *s)
2892 char **argv = buildargv (s);
2894 if (s != NULL && argv == NULL)
2902 compare_positive_ints (const void *ap, const void *bp)
2904 /* Because we know we're comparing two ints which are positive,
2905 there's no danger of overflow here. */
2906 return * (int *) ap - * (int *) bp;
2909 #define AMBIGUOUS_MESS1 ".\nMatching formats:"
2910 #define AMBIGUOUS_MESS2 \
2911 ".\nUse \"set gnutarget format-name\" to specify the format."
2914 gdb_bfd_errmsg (bfd_error_type error_tag, char **matching)
2918 /* Check if errmsg just need simple return. */
2919 if (error_tag != bfd_error_file_ambiguously_recognized || matching == NULL)
2920 return bfd_errmsg (error_tag);
2922 std::string ret (bfd_errmsg (error_tag));
2923 ret += AMBIGUOUS_MESS1;
2925 for (p = matching; *p; p++)
2930 ret += AMBIGUOUS_MESS2;
2937 /* Return ARGS parsed as a valid pid, or throw an error. */
2940 parse_pid_to_attach (const char *args)
2946 error_no_arg (_("process-id to attach"));
2948 dummy = (char *) args;
2949 pid = strtoul (args, &dummy, 0);
2950 /* Some targets don't set errno on errors, grrr! */
2951 if ((pid == 0 && dummy == args) || dummy != &args[strlen (args)])
2952 error (_("Illegal process-id: %s."), args);
2957 /* Helper for make_bpstat_clear_actions_cleanup. */
2960 do_bpstat_clear_actions_cleanup (void *unused)
2962 bpstat_clear_actions ();
2965 /* Call bpstat_clear_actions for the case an exception is throw. You should
2966 discard_cleanups if no exception is caught. */
2969 make_bpstat_clear_actions_cleanup (void)
2971 return make_cleanup (do_bpstat_clear_actions_cleanup, NULL);
2974 /* Substitute all occurences of string FROM by string TO in *STRINGP. *STRINGP
2975 must come from xrealloc-compatible allocator and it may be updated. FROM
2976 needs to be delimited by IS_DIR_SEPARATOR or DIRNAME_SEPARATOR (or be
2977 located at the start or end of *STRINGP. */
2980 substitute_path_component (char **stringp, const char *from, const char *to)
2982 char *string = *stringp, *s;
2983 const size_t from_len = strlen (from);
2984 const size_t to_len = strlen (to);
2988 s = strstr (s, from);
2992 if ((s == string || IS_DIR_SEPARATOR (s[-1])
2993 || s[-1] == DIRNAME_SEPARATOR)
2994 && (s[from_len] == '\0' || IS_DIR_SEPARATOR (s[from_len])
2995 || s[from_len] == DIRNAME_SEPARATOR))
3000 = (char *) xrealloc (string, (strlen (string) + to_len + 1));
3002 /* Relocate the current S pointer. */
3003 s = s - string + string_new;
3004 string = string_new;
3006 /* Replace from by to. */
3007 memmove (&s[to_len], &s[from_len], strlen (&s[from_len]) + 1);
3008 memcpy (s, to, to_len);
3023 /* SIGALRM handler for waitpid_with_timeout. */
3026 sigalrm_handler (int signo)
3028 /* Nothing to do. */
3033 /* Wrapper to wait for child PID to die with TIMEOUT.
3034 TIMEOUT is the time to stop waiting in seconds.
3035 If TIMEOUT is zero, pass WNOHANG to waitpid.
3036 Returns PID if it was successfully waited for, otherwise -1.
3038 Timeouts are currently implemented with alarm and SIGALRM.
3039 If the host does not support them, this waits "forever".
3040 It would be odd though for a host to have waitpid and not SIGALRM. */
3043 wait_to_die_with_timeout (pid_t pid, int *status, int timeout)
3045 pid_t waitpid_result;
3047 gdb_assert (pid > 0);
3048 gdb_assert (timeout >= 0);
3053 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
3054 struct sigaction sa, old_sa;
3056 sa.sa_handler = sigalrm_handler;
3057 sigemptyset (&sa.sa_mask);
3059 sigaction (SIGALRM, &sa, &old_sa);
3063 ofunc = signal (SIGALRM, sigalrm_handler);
3069 waitpid_result = waitpid (pid, status, 0);
3073 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
3074 sigaction (SIGALRM, &old_sa, NULL);
3076 signal (SIGALRM, ofunc);
3081 waitpid_result = waitpid (pid, status, WNOHANG);
3083 if (waitpid_result == pid)
3089 #endif /* HAVE_WAITPID */
3091 /* Provide fnmatch compatible function for FNM_FILE_NAME matching of host files.
3092 Both FNM_FILE_NAME and FNM_NOESCAPE must be set in FLAGS.
3094 It handles correctly HAVE_DOS_BASED_FILE_SYSTEM and
3095 HAVE_CASE_INSENSITIVE_FILE_SYSTEM. */
3098 gdb_filename_fnmatch (const char *pattern, const char *string, int flags)
3100 gdb_assert ((flags & FNM_FILE_NAME) != 0);
3102 /* It is unclear how '\' escaping vs. directory separator should coexist. */
3103 gdb_assert ((flags & FNM_NOESCAPE) != 0);
3105 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
3107 char *pattern_slash, *string_slash;
3109 /* Replace '\' by '/' in both strings. */
3111 pattern_slash = (char *) alloca (strlen (pattern) + 1);
3112 strcpy (pattern_slash, pattern);
3113 pattern = pattern_slash;
3114 for (; *pattern_slash != 0; pattern_slash++)
3115 if (IS_DIR_SEPARATOR (*pattern_slash))
3116 *pattern_slash = '/';
3118 string_slash = (char *) alloca (strlen (string) + 1);
3119 strcpy (string_slash, string);
3120 string = string_slash;
3121 for (; *string_slash != 0; string_slash++)
3122 if (IS_DIR_SEPARATOR (*string_slash))
3123 *string_slash = '/';
3125 #endif /* HAVE_DOS_BASED_FILE_SYSTEM */
3127 #ifdef HAVE_CASE_INSENSITIVE_FILE_SYSTEM
3128 flags |= FNM_CASEFOLD;
3129 #endif /* HAVE_CASE_INSENSITIVE_FILE_SYSTEM */
3131 return fnmatch (pattern, string, flags);
3134 /* Return the number of path elements in PATH.
3142 count_path_elements (const char *path)
3145 const char *p = path;
3147 if (HAS_DRIVE_SPEC (p))
3149 p = STRIP_DRIVE_SPEC (p);
3155 if (IS_DIR_SEPARATOR (*p))
3160 /* Backup one if last character is /, unless it's the only one. */
3161 if (p > path + 1 && IS_DIR_SEPARATOR (p[-1]))
3164 /* Add one for the file name, if present. */
3165 if (p > path && !IS_DIR_SEPARATOR (p[-1]))
3171 /* Remove N leading path elements from PATH.
3172 N must be non-negative.
3173 If PATH has more than N path elements then return NULL.
3174 If PATH has exactly N path elements then return "".
3175 See count_path_elements for a description of how we do the counting. */
3178 strip_leading_path_elements (const char *path, int n)
3181 const char *p = path;
3183 gdb_assert (n >= 0);
3188 if (HAS_DRIVE_SPEC (p))
3190 p = STRIP_DRIVE_SPEC (p);
3196 while (*p != '\0' && !IS_DIR_SEPARATOR (*p))
3214 copy_bitwise (gdb_byte *dest, ULONGEST dest_offset,
3215 const gdb_byte *source, ULONGEST source_offset,
3216 ULONGEST nbits, int bits_big_endian)
3218 unsigned int buf, avail;
3223 if (bits_big_endian)
3225 /* Start from the end, then work backwards. */
3226 dest_offset += nbits - 1;
3227 dest += dest_offset / 8;
3228 dest_offset = 7 - dest_offset % 8;
3229 source_offset += nbits - 1;
3230 source += source_offset / 8;
3231 source_offset = 7 - source_offset % 8;
3235 dest += dest_offset / 8;
3237 source += source_offset / 8;
3241 /* Fill BUF with DEST_OFFSET bits from the destination and 8 -
3242 SOURCE_OFFSET bits from the source. */
3243 buf = *(bits_big_endian ? source-- : source++) >> source_offset;
3244 buf <<= dest_offset;
3245 buf |= *dest & ((1 << dest_offset) - 1);
3247 /* NBITS: bits yet to be written; AVAIL: BUF's fill level. */
3248 nbits += dest_offset;
3249 avail = dest_offset + 8 - source_offset;
3251 /* Flush 8 bits from BUF, if appropriate. */
3252 if (nbits >= 8 && avail >= 8)
3254 *(bits_big_endian ? dest-- : dest++) = buf;
3260 /* Copy the middle part. */
3263 size_t len = nbits / 8;
3265 /* Use a faster method for byte-aligned copies. */
3268 if (bits_big_endian)
3272 memcpy (dest + 1, source + 1, len);
3276 memcpy (dest, source, len);
3285 buf |= *(bits_big_endian ? source-- : source++) << avail;
3286 *(bits_big_endian ? dest-- : dest++) = buf;
3293 /* Write the last byte. */
3297 buf |= *source << avail;
3299 buf &= (1 << nbits) - 1;
3300 *dest = (*dest & (~0 << nbits)) | buf;
3305 _initialize_utils (void)
3307 add_internal_problem_command (&internal_error_problem);
3308 add_internal_problem_command (&internal_warning_problem);
3309 add_internal_problem_command (&demangler_warning_problem);
3312 selftests::register_test ("gdb_realpath", gdb_realpath_tests);