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"
32 struct completion_match_for_lcd
;
35 /* String utilities. */
37 extern bool sevenbit_strings
;
39 /* Modes of operation for strncmp_iw_with_mode. */
41 enum class strncmp_iw_mode
43 /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any
44 differences in whitespace. Returns 0 if they match, non-zero if
45 they don't (slightly different than strcmp()'s range of return
49 /* Like NORMAL, but also apply the strcmp_iw hack. I.e.,
50 string1=="FOO(PARAMS)" matches string2=="FOO". */
54 /* Helper for strcmp_iw and strncmp_iw. Exported so that languages
55 can implement both NORMAL and MATCH_PARAMS variants in a single
56 function and defer part of the work to strncmp_iw_with_mode.
58 LANGUAGE is used to implement some context-sensitive
59 language-specific comparisons. For example, for C++,
60 "string1=operator()" should not match "string2=operator" even in
63 MATCH_FOR_LCD is passed down so that the function can mark parts of
64 the symbol name as ignored for completion matching purposes (e.g.,
65 to handle abi tags). */
66 extern int strncmp_iw_with_mode
67 (const char *string1
, const char *string2
, size_t string2_len
,
68 strncmp_iw_mode mode
, enum language language
,
69 completion_match_for_lcd
*match_for_lcd
= NULL
);
71 /* Do a strncmp() type operation on STRING1 and STRING2, ignoring any
72 differences in whitespace. STRING2_LEN is STRING2's length.
73 Returns 0 if STRING1 matches STRING2_LEN characters of STRING2,
74 non-zero otherwise (slightly different than strncmp()'s range of
75 return values). Note: passes language_minimal to
76 strncmp_iw_with_mode, and should therefore be avoided if a more
77 suitable language is available. */
78 extern int strncmp_iw (const char *string1
, const char *string2
,
81 /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any
82 differences in whitespace. Returns 0 if they match, non-zero if
83 they don't (slightly different than strcmp()'s range of return
86 As an extra hack, string1=="FOO(ARGS)" matches string2=="FOO".
87 This "feature" is useful when searching for matching C++ function
88 names (such as if the user types 'break FOO', where FOO is a
89 mangled C++ function).
91 Note: passes language_minimal to strncmp_iw_with_mode, and should
92 therefore be avoided if a more suitable language is available. */
93 extern int strcmp_iw (const char *string1
, const char *string2
);
95 extern int strcmp_iw_ordered (const char *, const char *);
97 /* Return true if the strings are equal. */
99 extern bool streq (const char *, const char *);
101 /* A variant of streq that is suitable for use as an htab
104 extern int streq_hash (const void *, const void *);
106 extern int subset_compare (const char *, const char *);
108 /* Compare C strings for std::sort. */
111 compare_cstrings (const char *str1
, const char *str2
)
113 return strcmp (str1
, str2
) < 0;
116 /* A wrapper for bfd_errmsg to produce a more helpful error message
117 in the case of bfd_error_file_ambiguously recognized.
118 MATCHING, if non-NULL, is the corresponding argument to
119 bfd_check_format_matches, and will be freed. */
121 extern std::string
gdb_bfd_errmsg (bfd_error_type error_tag
, char **matching
);
123 /* Reset the prompt_for_continue clock. */
124 void reset_prompt_for_continue_wait_time (void);
125 /* Return the time spent in prompt_for_continue. */
126 std::chrono::steady_clock::duration
get_prompt_for_continue_wait_time ();
128 /* Parsing utilities. */
130 extern int parse_pid_to_attach (const char *args
);
132 extern int parse_escape (struct gdbarch
*, const char **);
134 /* A wrapper for an array of char* that was allocated in the way that
135 'buildargv' does, and should be freed with 'freeargv'. */
141 /* A constructor that initializes to NULL. */
148 /* A constructor that calls buildargv on STR. STR may be NULL, in
149 which case this object is initialized with a NULL array. If
150 buildargv fails due to out-of-memory, call malloc_failure.
151 Therefore, the value is guaranteed to be non-NULL, unless the
152 parameter itself is NULL. */
154 explicit gdb_argv (const char *str
)
160 /* A constructor that takes ownership of an existing array. */
162 explicit gdb_argv (char **array
)
167 gdb_argv (const gdb_argv
&) = delete;
168 gdb_argv
&operator= (const gdb_argv
&) = delete;
175 /* Call buildargv on STR, storing the result in this object. Any
176 previous state is freed. STR may be NULL, in which case this
177 object is reset with a NULL array. If buildargv fails due to
178 out-of-memory, call malloc_failure. Therefore, the value is
179 guaranteed to be non-NULL, unless the parameter itself is
182 void reset (const char *str
);
184 /* Return the underlying array. */
191 /* Return the underlying array, transferring ownership to the
194 ATTRIBUTE_UNUSED_RESULT
char **release ()
196 char **result
= m_argv
;
201 /* Return the number of items in the array. */
205 return countargv (m_argv
);
208 /* Index into the array. */
210 char *operator[] (int arg
)
212 gdb_assert (m_argv
!= NULL
);
216 /* The iterator type. */
218 typedef char **iterator
;
220 /* Return an iterator pointing to the start of the array. */
227 /* Return an iterator pointing to the end of the array. */
231 return m_argv
+ count ();
234 bool operator!= (std::nullptr_t
)
236 return m_argv
!= NULL
;
239 bool operator== (std::nullptr_t
)
241 return m_argv
== NULL
;
246 /* The wrapped array. */
252 /* Cleanup utilities. */
254 /* A deleter for a hash table. */
257 void operator() (htab
*ptr
) const
263 /* A unique_ptr wrapper for htab_t. */
264 typedef std::unique_ptr
<htab
, htab_deleter
> htab_up
;
266 extern void init_page_info (void);
268 /* Temporarily set BATCH_FLAG and the associated unlimited terminal size.
269 Restore when destroyed. */
271 struct set_batch_flag_and_restore_page_info
275 set_batch_flag_and_restore_page_info ();
276 ~set_batch_flag_and_restore_page_info ();
278 DISABLE_COPY_AND_ASSIGN (set_batch_flag_and_restore_page_info
);
282 /* Note that this doesn't use scoped_restore, because it's important
283 to control the ordering of operations in the destruction, and it
284 was simpler to avoid introducing a new ad hoc class. */
285 unsigned m_save_lines_per_page
;
286 unsigned m_save_chars_per_line
;
287 int m_save_batch_flag
;
291 /* Path utilities. */
293 extern int gdb_filename_fnmatch (const char *pattern
, const char *string
,
296 extern void substitute_path_component (char **stringp
, const char *from
,
299 std::string
ldirname (const char *filename
);
301 extern int count_path_elements (const char *path
);
303 extern const char *strip_leading_path_elements (const char *path
, int n
);
305 /* GDB output, ui_file utilities. */
309 extern int query (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
310 extern int nquery (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
311 extern int yquery (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
313 extern void begin_line (void);
315 extern void wrap_here (const char *);
317 extern void reinitialize_more_filter (void);
319 extern bool pagination_enabled
;
321 extern struct ui_file
**current_ui_gdb_stdout_ptr (void);
322 extern struct ui_file
**current_ui_gdb_stdin_ptr (void);
323 extern struct ui_file
**current_ui_gdb_stderr_ptr (void);
324 extern struct ui_file
**current_ui_gdb_stdlog_ptr (void);
326 /* The current top level's ui_file streams. */
329 #define gdb_stdout (*current_ui_gdb_stdout_ptr ())
331 #define gdb_stdin (*current_ui_gdb_stdin_ptr ())
332 /* Serious error notifications */
333 #define gdb_stderr (*current_ui_gdb_stderr_ptr ())
334 /* Log/debug/trace messages that should bypass normal stdout/stderr
335 filtering. For moment, always call this stream using
336 *_unfiltered. In the very near future that restriction shall be
337 removed - either call shall be unfiltered. (cagney 1999-06-13). */
338 #define gdb_stdlog (*current_ui_gdb_stdlog_ptr ())
340 /* Truly global ui_file streams. These are all defined in main.c. */
342 /* Target output that should bypass normal stdout/stderr filtering.
343 For moment, always call this stream using *_unfiltered. In the
344 very near future that restriction shall be removed - either call
345 shall be unfiltered. (cagney 1999-07-02). */
346 extern struct ui_file
*gdb_stdtarg
;
347 extern struct ui_file
*gdb_stdtargerr
;
348 extern struct ui_file
*gdb_stdtargin
;
350 /* Set the screen dimensions to WIDTH and HEIGHT. */
352 extern void set_screen_width_and_height (int width
, int height
);
354 /* More generic printf like operations. Filtered versions may return
355 non-locally on error. As an extension over plain printf, these
356 support some GDB-specific format specifiers. Particularly useful
357 here are the styling formatters: '%p[', '%p]' and '%ps'. See
358 ui_out::message for details. */
360 extern void fputs_filtered (const char *, struct ui_file
*);
362 extern void fputs_unfiltered (const char *, struct ui_file
*);
364 extern int fputc_filtered (int c
, struct ui_file
*);
366 extern int fputc_unfiltered (int c
, struct ui_file
*);
368 extern int putchar_filtered (int c
);
370 extern int putchar_unfiltered (int c
);
372 extern void puts_filtered (const char *);
374 extern void puts_unfiltered (const char *);
376 extern void puts_filtered_tabular (char *string
, int width
, int right
);
378 extern void puts_debug (char *prefix
, char *string
, char *suffix
);
380 extern void vprintf_filtered (const char *, va_list) ATTRIBUTE_PRINTF (1, 0);
382 extern void vfprintf_filtered (struct ui_file
*, const char *, va_list)
383 ATTRIBUTE_PRINTF (2, 0);
385 extern void fprintf_filtered (struct ui_file
*, const char *, ...)
386 ATTRIBUTE_PRINTF (2, 3);
388 extern void fprintfi_filtered (int, struct ui_file
*, const char *, ...)
389 ATTRIBUTE_PRINTF (3, 4);
391 extern void printf_filtered (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
393 extern void printfi_filtered (int, const char *, ...) ATTRIBUTE_PRINTF (2, 3);
395 extern void vprintf_unfiltered (const char *, va_list) ATTRIBUTE_PRINTF (1, 0);
397 extern void vfprintf_unfiltered (struct ui_file
*, const char *, va_list)
398 ATTRIBUTE_PRINTF (2, 0);
400 extern void fprintf_unfiltered (struct ui_file
*, const char *, ...)
401 ATTRIBUTE_PRINTF (2, 3);
403 extern void printf_unfiltered (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
405 extern void print_spaces (int, struct ui_file
*);
407 extern void print_spaces_filtered (int, struct ui_file
*);
409 extern char *n_spaces (int);
411 extern void fputstr_filtered (const char *str
, int quotr
,
412 struct ui_file
* stream
);
414 extern void fputstr_unfiltered (const char *str
, int quotr
,
415 struct ui_file
* stream
);
417 extern void fputstrn_filtered (const char *str
, int n
, int quotr
,
418 struct ui_file
* stream
);
420 typedef int (*do_fputc_ftype
) (int c
, ui_file
*stream
);
422 extern void fputstrn_unfiltered (const char *str
, int n
, int quotr
,
423 do_fputc_ftype do_fputc
,
424 struct ui_file
* stream
);
426 /* Return nonzero if filtered printing is initialized. */
427 extern int filtered_printing_initialized (void);
429 /* Like fprintf_filtered, but styles the output according to STYLE,
432 extern void fprintf_styled (struct ui_file
*stream
,
433 const ui_file_style
&style
,
436 ATTRIBUTE_PRINTF (3, 4);
438 extern void vfprintf_styled (struct ui_file
*stream
,
439 const ui_file_style
&style
,
442 ATTRIBUTE_PRINTF (3, 0);
444 /* Like vfprintf_styled, but do not process gdb-specific format
446 extern void vfprintf_styled_no_gdbfmt (struct ui_file
*stream
,
447 const ui_file_style
&style
,
449 const char *fmt
, va_list args
)
450 ATTRIBUTE_PRINTF (4, 0);
452 /* Like fputs_filtered, but styles the output according to STYLE, when
455 extern void fputs_styled (const char *linebuffer
,
456 const ui_file_style
&style
,
457 struct ui_file
*stream
);
459 /* Unfiltered variant of fputs_styled. */
461 extern void fputs_styled_unfiltered (const char *linebuffer
,
462 const ui_file_style
&style
,
463 struct ui_file
*stream
);
465 /* Like fputs_styled, but uses highlight_style to highlight the
466 parts of STR that match HIGHLIGHT. */
468 extern void fputs_highlighted (const char *str
, const compiled_regex
&highlight
,
469 struct ui_file
*stream
);
471 /* Reset the terminal style to the default, if needed. */
473 extern void reset_terminal_style (struct ui_file
*stream
);
475 /* Display the host ADDR on STREAM formatted as ``0x%x''. */
476 extern void gdb_print_host_address_1 (const void *addr
, struct ui_file
*stream
);
478 /* Wrapper that avoids adding a pointless cast to all callers. */
479 #define gdb_print_host_address(ADDR, STREAM) \
480 gdb_print_host_address_1 ((const void *) ADDR, STREAM)
482 /* Return the address only having significant bits. */
483 extern CORE_ADDR
address_significant (gdbarch
*gdbarch
, CORE_ADDR addr
);
485 /* Convert CORE_ADDR to string in platform-specific manner.
486 This is usually formatted similar to 0x%lx. */
487 extern const char *paddress (struct gdbarch
*gdbarch
, CORE_ADDR addr
);
489 /* Return a string representation in hexadecimal notation of ADDRESS,
490 which is suitable for printing. */
492 extern const char *print_core_address (struct gdbarch
*gdbarch
,
495 /* Callback hash_f and eq_f for htab_create_alloc or htab_create_alloc_ex. */
496 extern hashval_t
core_addr_hash (const void *ap
);
497 extern int core_addr_eq (const void *ap
, const void *bp
);
499 extern CORE_ADDR
string_to_core_addr (const char *my_string
);
501 extern void fprintf_symbol_filtered (struct ui_file
*, const char *,
504 extern void throw_perror_with_name (enum errors errcode
, const char *string
)
507 extern void perror_warning_with_name (const char *string
);
509 extern void print_sys_errmsg (const char *, int);
511 /* Warnings and error messages. */
513 extern void (*deprecated_error_begin_hook
) (void);
515 /* Message to be printed before the warning message, when a warning occurs. */
517 extern const char *warning_pre_print
;
519 extern void error_stream (const string_file
&) ATTRIBUTE_NORETURN
;
521 extern void demangler_vwarning (const char *file
, int line
,
522 const char *, va_list ap
)
523 ATTRIBUTE_PRINTF (3, 0);
525 extern void demangler_warning (const char *file
, int line
,
526 const char *, ...) ATTRIBUTE_PRINTF (3, 4);
529 /* Misc. utilities. */
531 /* Allocation and deallocation functions for the libiberty hash table
532 which use obstacks. */
533 void *hashtab_obstack_allocate (void *data
, size_t size
, size_t count
);
534 void dummy_obstack_deallocate (void *object
, void *data
);
537 extern pid_t
wait_to_die_with_timeout (pid_t pid
, int *status
, int timeout
);
540 extern int myread (int, char *, int);
542 /* Resource limits used by getrlimit and setrlimit. */
544 enum resource_limit_kind
550 /* Check whether GDB will be able to dump core using the dump_core
551 function. Returns zero if GDB cannot or should not dump core.
552 If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected.
553 If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */
555 extern int can_dump_core (enum resource_limit_kind limit_kind
);
557 /* Print a warning that we cannot dump core. */
559 extern void warn_cant_dump_core (const char *reason
);
561 /* Dump core trying to increase the core soft limit to hard limit
564 extern void dump_core (void);
566 /* Copy NBITS bits from SOURCE to DEST starting at the given bit
567 offsets. Use the bit order as specified by BITS_BIG_ENDIAN.
568 Source and destination buffers must not overlap. */
570 extern void copy_bitwise (gdb_byte
*dest
, ULONGEST dest_offset
,
571 const gdb_byte
*source
, ULONGEST source_offset
,
572 ULONGEST nbits
, int bits_big_endian
);
574 /* A fast hashing function. This can be used to hash strings in a fast way
575 when the length is known. If no fast hashing library is available, falls
576 back to iterative_hash from libiberty. */
578 static inline unsigned int
579 fast_hash (const char* str
, size_t len
)
581 #ifdef HAVE_LIBXXHASH
582 return XXH64 (str
, len
, 0);
584 return iterative_hash (str
, len
, 0);