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 "common/scoped_restore.h"
28 extern void initialize_utils (void);
30 /* String utilities. */
32 extern int sevenbit_strings;
34 /* Modes of operation for strncmp_iw_with_mode. */
36 enum class strncmp_iw_mode
38 /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any
39 differences in whitespace. Returns 0 if they match, non-zero if
40 they don't (slightly different than strcmp()'s range of return
44 /* Like NORMAL, but also apply the strcmp_iw hack. I.e.,
45 string1=="FOO(PARAMS)" matches string2=="FOO". */
49 /* Helper for strcmp_iw and strncmp_iw. Exported so that languages
50 can implement both NORMAL and MATCH_PARAMS variants in a single
51 function and defer part of the work to strncmp_iw_with_mode.
53 LANGUAGE is used to implement some context-sensitive
54 language-specific comparisons. For example, for C++,
55 "string1=operator()" should not match "string2=operator" even in
58 MATCH_FOR_LCD is passed down so that the function can mark parts of
59 the symbol name as ignored for completion matching purposes (e.g.,
60 to handle abi tags). */
61 extern int strncmp_iw_with_mode
62 (const char *string1, const char *string2, size_t string2_len,
63 strncmp_iw_mode mode, enum language language,
64 completion_match_for_lcd *match_for_lcd = NULL);
66 /* Do a strncmp() type operation on STRING1 and STRING2, ignoring any
67 differences in whitespace. STRING2_LEN is STRING2's length.
68 Returns 0 if STRING1 matches STRING2_LEN characters of STRING2,
69 non-zero otherwise (slightly different than strncmp()'s range of
70 return values). Note: passes language_minimal to
71 strncmp_iw_with_mode, and should therefore be avoided if a more
72 suitable language is available. */
73 extern int strncmp_iw (const char *string1, const char *string2,
76 /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any
77 differences in whitespace. Returns 0 if they match, non-zero if
78 they don't (slightly different than strcmp()'s range of return
81 As an extra hack, string1=="FOO(ARGS)" matches string2=="FOO".
82 This "feature" is useful when searching for matching C++ function
83 names (such as if the user types 'break FOO', where FOO is a
84 mangled C++ function).
86 Note: passes language_minimal to strncmp_iw_with_mode, and should
87 therefore be avoided if a more suitable language is available. */
88 extern int strcmp_iw (const char *string1, const char *string2);
90 extern int strcmp_iw_ordered (const char *, const char *);
92 /* Return true if the strings are equal. */
94 extern bool streq (const char *, const char *);
96 /* A variant of streq that is suitable for use as an htab
99 extern int streq_hash (const void *, const void *);
101 extern int subset_compare (const char *, const char *);
103 int compare_positive_ints (const void *ap, const void *bp);
105 /* Compare C strings for std::sort. */
108 compare_cstrings (const char *str1, const char *str2)
110 return strcmp (str1, str2) < 0;
113 /* A wrapper for bfd_errmsg to produce a more helpful error message
114 in the case of bfd_error_file_ambiguously recognized.
115 MATCHING, if non-NULL, is the corresponding argument to
116 bfd_check_format_matches, and will be freed. */
118 extern std::string gdb_bfd_errmsg (bfd_error_type error_tag, char **matching);
120 /* Reset the prompt_for_continue clock. */
121 void reset_prompt_for_continue_wait_time (void);
122 /* Return the time spent in prompt_for_continue. */
123 std::chrono::steady_clock::duration get_prompt_for_continue_wait_time ();
125 /* Parsing utilites. */
127 extern int parse_pid_to_attach (const char *args);
129 extern int parse_escape (struct gdbarch *, const char **);
131 /* A wrapper for an array of char* that was allocated in the way that
132 'buildargv' does, and should be freed with 'freeargv'. */
138 /* A constructor that initializes to NULL. */
145 /* A constructor that calls buildargv on STR. STR may be NULL, in
146 which case this object is initialized with a NULL array. If
147 buildargv fails due to out-of-memory, call malloc_failure.
148 Therefore, the value is guaranteed to be non-NULL, unless the
149 parameter itself is NULL. */
151 explicit gdb_argv (const char *str)
157 /* A constructor that takes ownership of an existing array. */
159 explicit gdb_argv (char **array)
164 gdb_argv (const gdb_argv &) = delete;
165 gdb_argv &operator= (const gdb_argv &) = delete;
172 /* Call buildargv on STR, storing the result in this object. Any
173 previous state is freed. STR may be NULL, in which case this
174 object is reset with a NULL array. If buildargv fails due to
175 out-of-memory, call malloc_failure. Therefore, the value is
176 guaranteed to be non-NULL, unless the parameter itself is
179 void reset (const char *str);
181 /* Return the underlying array. */
188 /* Return the underlying array, transferring ownership to the
193 char **result = m_argv;
198 /* Return the number of items in the array. */
202 return countargv (m_argv);
205 /* Index into the array. */
207 char *operator[] (int arg)
209 gdb_assert (m_argv != NULL);
213 /* The iterator type. */
215 typedef char **iterator;
217 /* Return an iterator pointing to the start of the array. */
224 /* Return an iterator pointing to the end of the array. */
228 return m_argv + count ();
231 bool operator!= (std::nullptr_t)
233 return m_argv != NULL;
236 bool operator== (std::nullptr_t)
238 return m_argv == NULL;
243 /* The wrapped array. */
249 /* Cleanup utilities. */
251 /* A deleter for a hash table. */
254 void operator() (htab *ptr) const
260 /* A unique_ptr wrapper for htab_t. */
261 typedef std::unique_ptr<htab, htab_deleter> htab_up;
263 extern void free_current_contents (void *);
265 extern void init_page_info (void);
267 /* Temporarily set BATCH_FLAG and the associated unlimited terminal size.
268 Restore when destroyed. */
270 struct set_batch_flag_and_restore_page_info
274 set_batch_flag_and_restore_page_info ();
275 ~set_batch_flag_and_restore_page_info ();
277 DISABLE_COPY_AND_ASSIGN (set_batch_flag_and_restore_page_info);
281 /* Note that this doesn't use scoped_restore, because it's important
282 to control the ordering of operations in the destruction, and it
283 was simpler to avoid introducing a new ad hoc class. */
284 unsigned m_save_lines_per_page;
285 unsigned m_save_chars_per_line;
286 int m_save_batch_flag;
290 /* Path utilities. */
292 extern int gdb_filename_fnmatch (const char *pattern, const char *string,
295 extern void substitute_path_component (char **stringp, const char *from,
298 std::string ldirname (const char *filename);
300 extern int count_path_elements (const char *path);
302 extern const char *strip_leading_path_elements (const char *path, int n);
304 /* GDB output, ui_file utilities. */
308 extern int query (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
309 extern int nquery (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
310 extern int yquery (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
312 extern void begin_line (void);
314 extern void wrap_here (const char *);
316 extern void reinitialize_more_filter (void);
318 extern int pagination_enabled;
320 extern struct ui_file **current_ui_gdb_stdout_ptr (void);
321 extern struct ui_file **current_ui_gdb_stdin_ptr (void);
322 extern struct ui_file **current_ui_gdb_stderr_ptr (void);
323 extern struct ui_file **current_ui_gdb_stdlog_ptr (void);
325 /* The current top level's ui_file streams. */
328 #define gdb_stdout (*current_ui_gdb_stdout_ptr ())
330 #define gdb_stdin (*current_ui_gdb_stdin_ptr ())
331 /* Serious error notifications */
332 #define gdb_stderr (*current_ui_gdb_stderr_ptr ())
333 /* Log/debug/trace messages that should bypass normal stdout/stderr
334 filtering. For moment, always call this stream using
335 *_unfiltered. In the very near future that restriction shall be
336 removed - either call shall be unfiltered. (cagney 1999-06-13). */
337 #define gdb_stdlog (*current_ui_gdb_stdlog_ptr ())
339 /* Truly global ui_file streams. These are all defined in main.c. */
341 /* Target output that should bypass normal stdout/stderr filtering.
342 For moment, always call this stream using *_unfiltered. In the
343 very near future that restriction shall be removed - either call
344 shall be unfiltered. (cagney 1999-07-02). */
345 extern struct ui_file *gdb_stdtarg;
346 extern struct ui_file *gdb_stdtargerr;
347 extern struct ui_file *gdb_stdtargin;
349 /* Set the screen dimensions to WIDTH and HEIGHT. */
351 extern void set_screen_width_and_height (int width, int height);
353 /* More generic printf like operations. Filtered versions may return
354 non-locally on error. */
356 extern void fputs_filtered (const char *, struct ui_file *);
358 extern void fputs_unfiltered (const char *, struct ui_file *);
360 extern int fputc_filtered (int c, struct ui_file *);
362 extern int fputc_unfiltered (int c, struct ui_file *);
364 extern int putchar_filtered (int c);
366 extern int putchar_unfiltered (int c);
368 extern void puts_filtered (const char *);
370 extern void puts_unfiltered (const char *);
372 extern void puts_filtered_tabular (char *string, int width, int right);
374 extern void puts_debug (char *prefix, char *string, char *suffix);
376 extern void vprintf_filtered (const char *, va_list) ATTRIBUTE_PRINTF (1, 0);
378 extern void vfprintf_filtered (struct ui_file *, const char *, va_list)
379 ATTRIBUTE_PRINTF (2, 0);
381 extern void fprintf_filtered (struct ui_file *, const char *, ...)
382 ATTRIBUTE_PRINTF (2, 3);
384 extern void fprintfi_filtered (int, struct ui_file *, const char *, ...)
385 ATTRIBUTE_PRINTF (3, 4);
387 extern void printf_filtered (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
389 extern void printfi_filtered (int, const char *, ...) ATTRIBUTE_PRINTF (2, 3);
391 extern void vprintf_unfiltered (const char *, va_list) ATTRIBUTE_PRINTF (1, 0);
393 extern void vfprintf_unfiltered (struct ui_file *, const char *, va_list)
394 ATTRIBUTE_PRINTF (2, 0);
396 extern void fprintf_unfiltered (struct ui_file *, const char *, ...)
397 ATTRIBUTE_PRINTF (2, 3);
399 extern void printf_unfiltered (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
401 extern void print_spaces (int, struct ui_file *);
403 extern void print_spaces_filtered (int, struct ui_file *);
405 extern char *n_spaces (int);
407 extern void fputstr_filtered (const char *str, int quotr,
408 struct ui_file * stream);
410 extern void fputstr_unfiltered (const char *str, int quotr,
411 struct ui_file * stream);
413 extern void fputstrn_filtered (const char *str, int n, int quotr,
414 struct ui_file * stream);
416 typedef int (*do_fputc_ftype) (int c, ui_file *stream);
418 extern void fputstrn_unfiltered (const char *str, int n, int quotr,
419 do_fputc_ftype do_fputc,
420 struct ui_file * stream);
422 /* Return nonzero if filtered printing is initialized. */
423 extern int filtered_printing_initialized (void);
425 /* Like fprintf_filtered, but styles the output according to STYLE,
428 extern void fprintf_styled (struct ui_file *stream,
429 const ui_file_style &style,
432 ATTRIBUTE_PRINTF (3, 4);
434 /* Like fputs_filtered, but styles the output according to STYLE, when
437 extern void fputs_styled (const char *linebuffer,
438 const ui_file_style &style,
439 struct ui_file *stream);
441 /* Reset the terminal style to the default, if needed. */
443 extern void reset_terminal_style (struct ui_file *stream);
445 /* Return true if ANSI escapes can be used on STREAM. */
447 extern bool can_emit_style_escape (struct ui_file *stream);
449 /* Display the host ADDR on STREAM formatted as ``0x%x''. */
450 extern void gdb_print_host_address_1 (const void *addr, struct ui_file *stream);
452 /* Wrapper that avoids adding a pointless cast to all callers. */
453 #define gdb_print_host_address(ADDR, STREAM) \
454 gdb_print_host_address_1 ((const void *) ADDR, STREAM)
456 /* Return the address only having significant bits. */
457 extern CORE_ADDR address_significant (gdbarch *gdbarch, CORE_ADDR addr);
459 /* Convert CORE_ADDR to string in platform-specific manner.
460 This is usually formatted similar to 0x%lx. */
461 extern const char *paddress (struct gdbarch *gdbarch, CORE_ADDR addr);
463 /* Return a string representation in hexadecimal notation of ADDRESS,
464 which is suitable for printing. */
466 extern const char *print_core_address (struct gdbarch *gdbarch,
469 /* Callback hash_f and eq_f for htab_create_alloc or htab_create_alloc_ex. */
470 extern hashval_t core_addr_hash (const void *ap);
471 extern int core_addr_eq (const void *ap, const void *bp);
473 extern CORE_ADDR string_to_core_addr (const char *my_string);
475 extern void fprintf_symbol_filtered (struct ui_file *, const char *,
478 extern void throw_perror_with_name (enum errors errcode, const char *string)
481 extern void perror_warning_with_name (const char *string);
483 extern void print_sys_errmsg (const char *, int);
485 /* Warnings and error messages. */
487 extern void (*deprecated_error_begin_hook) (void);
489 /* Message to be printed before the warning message, when a warning occurs. */
491 extern const char *warning_pre_print;
493 extern void error_stream (const string_file &) ATTRIBUTE_NORETURN;
495 extern void demangler_vwarning (const char *file, int line,
496 const char *, va_list ap)
497 ATTRIBUTE_PRINTF (3, 0);
499 extern void demangler_warning (const char *file, int line,
500 const char *, ...) ATTRIBUTE_PRINTF (3, 4);
503 /* Misc. utilities. */
505 /* Allocation and deallocation functions for the libiberty hash table
506 which use obstacks. */
507 void *hashtab_obstack_allocate (void *data, size_t size, size_t count);
508 void dummy_obstack_deallocate (void *object, void *data);
511 extern pid_t wait_to_die_with_timeout (pid_t pid, int *status, int timeout);
514 extern int myread (int, char *, int);
516 /* Resource limits used by getrlimit and setrlimit. */
518 enum resource_limit_kind
524 /* Check whether GDB will be able to dump core using the dump_core
525 function. Returns zero if GDB cannot or should not dump core.
526 If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected.
527 If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */
529 extern int can_dump_core (enum resource_limit_kind limit_kind);
531 /* Print a warning that we cannot dump core. */
533 extern void warn_cant_dump_core (const char *reason);
535 /* Dump core trying to increase the core soft limit to hard limit
538 extern void dump_core (void);
540 /* Return the hex string form of LENGTH bytes of DATA.
541 Space for the result is malloc'd, caller must free. */
543 extern char *make_hex_string (const gdb_byte *data, size_t length);
545 /* Copy NBITS bits from SOURCE to DEST starting at the given bit
546 offsets. Use the bit order as specified by BITS_BIG_ENDIAN.
547 Source and destination buffers must not overlap. */
549 extern void copy_bitwise (gdb_byte *dest, ULONGEST dest_offset,
550 const gdb_byte *source, ULONGEST source_offset,
551 ULONGEST nbits, int bits_big_endian);