1 /* *INDENT-OFF* */ /* ATTRIBUTE_PRINTF confuses indent, avoid running it
3 /* I/O, string, cleanup, and other random utilities for GDB.
4 Copyright (C) 1986-2019 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "exceptions.h"
25 #include "gdbsupport/scoped_restore.h"
28 struct completion_match_for_lcd
;
31 /* String utilities. */
33 extern bool sevenbit_strings
;
35 /* Modes of operation for strncmp_iw_with_mode. */
37 enum class strncmp_iw_mode
39 /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any
40 differences in whitespace. Returns 0 if they match, non-zero if
41 they don't (slightly different than strcmp()'s range of return
45 /* Like NORMAL, but also apply the strcmp_iw hack. I.e.,
46 string1=="FOO(PARAMS)" matches string2=="FOO". */
50 /* Helper for strcmp_iw and strncmp_iw. Exported so that languages
51 can implement both NORMAL and MATCH_PARAMS variants in a single
52 function and defer part of the work to strncmp_iw_with_mode.
54 LANGUAGE is used to implement some context-sensitive
55 language-specific comparisons. For example, for C++,
56 "string1=operator()" should not match "string2=operator" even in
59 MATCH_FOR_LCD is passed down so that the function can mark parts of
60 the symbol name as ignored for completion matching purposes (e.g.,
61 to handle abi tags). */
62 extern int strncmp_iw_with_mode
63 (const char *string1
, const char *string2
, size_t string2_len
,
64 strncmp_iw_mode mode
, enum language language
,
65 completion_match_for_lcd
*match_for_lcd
= NULL
);
67 /* Do a strncmp() type operation on STRING1 and STRING2, ignoring any
68 differences in whitespace. STRING2_LEN is STRING2's length.
69 Returns 0 if STRING1 matches STRING2_LEN characters of STRING2,
70 non-zero otherwise (slightly different than strncmp()'s range of
71 return values). Note: passes language_minimal to
72 strncmp_iw_with_mode, and should therefore be avoided if a more
73 suitable language is available. */
74 extern int strncmp_iw (const char *string1
, const char *string2
,
77 /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any
78 differences in whitespace. Returns 0 if they match, non-zero if
79 they don't (slightly different than strcmp()'s range of return
82 As an extra hack, string1=="FOO(ARGS)" matches string2=="FOO".
83 This "feature" is useful when searching for matching C++ function
84 names (such as if the user types 'break FOO', where FOO is a
85 mangled C++ function).
87 Note: passes language_minimal to strncmp_iw_with_mode, and should
88 therefore be avoided if a more suitable language is available. */
89 extern int strcmp_iw (const char *string1
, const char *string2
);
91 extern int strcmp_iw_ordered (const char *, const char *);
93 /* Return true if the strings are equal. */
95 extern bool streq (const char *, const char *);
97 /* A variant of streq that is suitable for use as an htab
100 extern int streq_hash (const void *, const void *);
102 extern int subset_compare (const char *, const char *);
104 int compare_positive_ints (const void *ap
, const void *bp
);
106 /* Compare C strings for std::sort. */
109 compare_cstrings (const char *str1
, const char *str2
)
111 return strcmp (str1
, str2
) < 0;
114 /* A wrapper for bfd_errmsg to produce a more helpful error message
115 in the case of bfd_error_file_ambiguously recognized.
116 MATCHING, if non-NULL, is the corresponding argument to
117 bfd_check_format_matches, and will be freed. */
119 extern std::string
gdb_bfd_errmsg (bfd_error_type error_tag
, char **matching
);
121 /* Reset the prompt_for_continue clock. */
122 void reset_prompt_for_continue_wait_time (void);
123 /* Return the time spent in prompt_for_continue. */
124 std::chrono::steady_clock::duration
get_prompt_for_continue_wait_time ();
126 /* Parsing utilites. */
128 extern int parse_pid_to_attach (const char *args
);
130 extern int parse_escape (struct gdbarch
*, const char **);
132 /* A wrapper for an array of char* that was allocated in the way that
133 'buildargv' does, and should be freed with 'freeargv'. */
139 /* A constructor that initializes to NULL. */
146 /* A constructor that calls buildargv on STR. STR may be NULL, in
147 which case this object is initialized with a NULL array. If
148 buildargv fails due to out-of-memory, call malloc_failure.
149 Therefore, the value is guaranteed to be non-NULL, unless the
150 parameter itself is NULL. */
152 explicit gdb_argv (const char *str
)
158 /* A constructor that takes ownership of an existing array. */
160 explicit gdb_argv (char **array
)
165 gdb_argv (const gdb_argv
&) = delete;
166 gdb_argv
&operator= (const gdb_argv
&) = delete;
173 /* Call buildargv on STR, storing the result in this object. Any
174 previous state is freed. STR may be NULL, in which case this
175 object is reset with a NULL array. If buildargv fails due to
176 out-of-memory, call malloc_failure. Therefore, the value is
177 guaranteed to be non-NULL, unless the parameter itself is
180 void reset (const char *str
);
182 /* Return the underlying array. */
189 /* Return the underlying array, transferring ownership to the
192 ATTRIBUTE_UNUSED_RESULT
char **release ()
194 char **result
= m_argv
;
199 /* Return the number of items in the array. */
203 return countargv (m_argv
);
206 /* Index into the array. */
208 char *operator[] (int arg
)
210 gdb_assert (m_argv
!= NULL
);
214 /* The iterator type. */
216 typedef char **iterator
;
218 /* Return an iterator pointing to the start of the array. */
225 /* Return an iterator pointing to the end of the array. */
229 return m_argv
+ count ();
232 bool operator!= (std::nullptr_t
)
234 return m_argv
!= NULL
;
237 bool operator== (std::nullptr_t
)
239 return m_argv
== NULL
;
244 /* The wrapped array. */
250 /* Cleanup utilities. */
252 /* A deleter for a hash table. */
255 void operator() (htab
*ptr
) const
261 /* A unique_ptr wrapper for htab_t. */
262 typedef std::unique_ptr
<htab
, htab_deleter
> htab_up
;
264 extern void init_page_info (void);
266 /* Temporarily set BATCH_FLAG and the associated unlimited terminal size.
267 Restore when destroyed. */
269 struct set_batch_flag_and_restore_page_info
273 set_batch_flag_and_restore_page_info ();
274 ~set_batch_flag_and_restore_page_info ();
276 DISABLE_COPY_AND_ASSIGN (set_batch_flag_and_restore_page_info
);
280 /* Note that this doesn't use scoped_restore, because it's important
281 to control the ordering of operations in the destruction, and it
282 was simpler to avoid introducing a new ad hoc class. */
283 unsigned m_save_lines_per_page
;
284 unsigned m_save_chars_per_line
;
285 int m_save_batch_flag
;
289 /* Path utilities. */
291 extern int gdb_filename_fnmatch (const char *pattern
, const char *string
,
294 extern void substitute_path_component (char **stringp
, const char *from
,
297 std::string
ldirname (const char *filename
);
299 extern int count_path_elements (const char *path
);
301 extern const char *strip_leading_path_elements (const char *path
, int n
);
303 /* GDB output, ui_file utilities. */
307 extern int query (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
308 extern int nquery (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
309 extern int yquery (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
311 extern void begin_line (void);
313 extern void wrap_here (const char *);
315 extern void reinitialize_more_filter (void);
317 extern bool pagination_enabled
;
319 extern struct ui_file
**current_ui_gdb_stdout_ptr (void);
320 extern struct ui_file
**current_ui_gdb_stdin_ptr (void);
321 extern struct ui_file
**current_ui_gdb_stderr_ptr (void);
322 extern struct ui_file
**current_ui_gdb_stdlog_ptr (void);
324 /* The current top level's ui_file streams. */
327 #define gdb_stdout (*current_ui_gdb_stdout_ptr ())
329 #define gdb_stdin (*current_ui_gdb_stdin_ptr ())
330 /* Serious error notifications */
331 #define gdb_stderr (*current_ui_gdb_stderr_ptr ())
332 /* Log/debug/trace messages that should bypass normal stdout/stderr
333 filtering. For moment, always call this stream using
334 *_unfiltered. In the very near future that restriction shall be
335 removed - either call shall be unfiltered. (cagney 1999-06-13). */
336 #define gdb_stdlog (*current_ui_gdb_stdlog_ptr ())
338 /* Truly global ui_file streams. These are all defined in main.c. */
340 /* Target output that should bypass normal stdout/stderr filtering.
341 For moment, always call this stream using *_unfiltered. In the
342 very near future that restriction shall be removed - either call
343 shall be unfiltered. (cagney 1999-07-02). */
344 extern struct ui_file
*gdb_stdtarg
;
345 extern struct ui_file
*gdb_stdtargerr
;
346 extern struct ui_file
*gdb_stdtargin
;
348 /* Set the screen dimensions to WIDTH and HEIGHT. */
350 extern void set_screen_width_and_height (int width
, int height
);
352 /* More generic printf like operations. Filtered versions may return
353 non-locally on error. */
355 extern void fputs_filtered (const char *, struct ui_file
*);
357 extern void fputs_unfiltered (const char *, struct ui_file
*);
359 extern int fputc_filtered (int c
, struct ui_file
*);
361 extern int fputc_unfiltered (int c
, struct ui_file
*);
363 extern int putchar_filtered (int c
);
365 extern int putchar_unfiltered (int c
);
367 extern void puts_filtered (const char *);
369 extern void puts_unfiltered (const char *);
371 extern void puts_filtered_tabular (char *string
, int width
, int right
);
373 extern void puts_debug (char *prefix
, char *string
, char *suffix
);
375 extern void vprintf_filtered (const char *, va_list) ATTRIBUTE_PRINTF (1, 0);
377 extern void vfprintf_filtered (struct ui_file
*, const char *, va_list)
378 ATTRIBUTE_PRINTF (2, 0);
380 extern void fprintf_filtered (struct ui_file
*, const char *, ...)
381 ATTRIBUTE_PRINTF (2, 3);
383 extern void fprintfi_filtered (int, struct ui_file
*, const char *, ...)
384 ATTRIBUTE_PRINTF (3, 4);
386 extern void printf_filtered (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
388 extern void printfi_filtered (int, const char *, ...) ATTRIBUTE_PRINTF (2, 3);
390 extern void vprintf_unfiltered (const char *, va_list) ATTRIBUTE_PRINTF (1, 0);
392 extern void vfprintf_unfiltered (struct ui_file
*, const char *, va_list)
393 ATTRIBUTE_PRINTF (2, 0);
395 extern void fprintf_unfiltered (struct ui_file
*, const char *, ...)
396 ATTRIBUTE_PRINTF (2, 3);
398 extern void printf_unfiltered (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
400 extern void print_spaces (int, struct ui_file
*);
402 extern void print_spaces_filtered (int, struct ui_file
*);
404 extern char *n_spaces (int);
406 extern void fputstr_filtered (const char *str
, int quotr
,
407 struct ui_file
* stream
);
409 extern void fputstr_unfiltered (const char *str
, int quotr
,
410 struct ui_file
* stream
);
412 extern void fputstrn_filtered (const char *str
, int n
, int quotr
,
413 struct ui_file
* stream
);
415 typedef int (*do_fputc_ftype
) (int c
, ui_file
*stream
);
417 extern void fputstrn_unfiltered (const char *str
, int n
, int quotr
,
418 do_fputc_ftype do_fputc
,
419 struct ui_file
* stream
);
421 /* Return nonzero if filtered printing is initialized. */
422 extern int filtered_printing_initialized (void);
424 /* Like fprintf_filtered, but styles the output according to STYLE,
427 extern void fprintf_styled (struct ui_file
*stream
,
428 const ui_file_style
&style
,
431 ATTRIBUTE_PRINTF (3, 4);
433 /* Like fputs_filtered, but styles the output according to STYLE, when
436 extern void fputs_styled (const char *linebuffer
,
437 const ui_file_style
&style
,
438 struct ui_file
*stream
);
440 /* Like fputs_styled, but uses highlight_style to highlight the
441 parts of STR that match HIGHLIGHT. */
443 extern void fputs_highlighted (const char *str
, const compiled_regex
&highlight
,
444 struct ui_file
*stream
);
446 /* Reset the terminal style to the default, if needed. */
448 extern void reset_terminal_style (struct ui_file
*stream
);
450 /* Display the host ADDR on STREAM formatted as ``0x%x''. */
451 extern void gdb_print_host_address_1 (const void *addr
, struct ui_file
*stream
);
453 /* Wrapper that avoids adding a pointless cast to all callers. */
454 #define gdb_print_host_address(ADDR, STREAM) \
455 gdb_print_host_address_1 ((const void *) ADDR, STREAM)
457 /* Return the address only having significant bits. */
458 extern CORE_ADDR
address_significant (gdbarch
*gdbarch
, CORE_ADDR addr
);
460 /* Convert CORE_ADDR to string in platform-specific manner.
461 This is usually formatted similar to 0x%lx. */
462 extern const char *paddress (struct gdbarch
*gdbarch
, CORE_ADDR addr
);
464 /* Return a string representation in hexadecimal notation of ADDRESS,
465 which is suitable for printing. */
467 extern const char *print_core_address (struct gdbarch
*gdbarch
,
470 /* Callback hash_f and eq_f for htab_create_alloc or htab_create_alloc_ex. */
471 extern hashval_t
core_addr_hash (const void *ap
);
472 extern int core_addr_eq (const void *ap
, const void *bp
);
474 extern CORE_ADDR
string_to_core_addr (const char *my_string
);
476 extern void fprintf_symbol_filtered (struct ui_file
*, const char *,
479 extern void throw_perror_with_name (enum errors errcode
, const char *string
)
482 extern void perror_warning_with_name (const char *string
);
484 extern void print_sys_errmsg (const char *, int);
486 /* Warnings and error messages. */
488 extern void (*deprecated_error_begin_hook
) (void);
490 /* Message to be printed before the warning message, when a warning occurs. */
492 extern const char *warning_pre_print
;
494 extern void error_stream (const string_file
&) ATTRIBUTE_NORETURN
;
496 extern void demangler_vwarning (const char *file
, int line
,
497 const char *, va_list ap
)
498 ATTRIBUTE_PRINTF (3, 0);
500 extern void demangler_warning (const char *file
, int line
,
501 const char *, ...) ATTRIBUTE_PRINTF (3, 4);
504 /* Misc. utilities. */
506 /* Allocation and deallocation functions for the libiberty hash table
507 which use obstacks. */
508 void *hashtab_obstack_allocate (void *data
, size_t size
, size_t count
);
509 void dummy_obstack_deallocate (void *object
, void *data
);
512 extern pid_t
wait_to_die_with_timeout (pid_t pid
, int *status
, int timeout
);
515 extern int myread (int, char *, int);
517 /* Resource limits used by getrlimit and setrlimit. */
519 enum resource_limit_kind
525 /* Check whether GDB will be able to dump core using the dump_core
526 function. Returns zero if GDB cannot or should not dump core.
527 If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected.
528 If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */
530 extern int can_dump_core (enum resource_limit_kind limit_kind
);
532 /* Print a warning that we cannot dump core. */
534 extern void warn_cant_dump_core (const char *reason
);
536 /* Dump core trying to increase the core soft limit to hard limit
539 extern void dump_core (void);
541 /* Copy NBITS bits from SOURCE to DEST starting at the given bit
542 offsets. Use the bit order as specified by BITS_BIG_ENDIAN.
543 Source and destination buffers must not overlap. */
545 extern void copy_bitwise (gdb_byte
*dest
, ULONGEST dest_offset
,
546 const gdb_byte
*source
, ULONGEST source_offset
,
547 ULONGEST nbits
, int bits_big_endian
);