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
191 ATTRIBUTE_UNUSED_RESULT char **release ()
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 init_page_info (void);
265 /* Temporarily set BATCH_FLAG and the associated unlimited terminal size.
266 Restore when destroyed. */
268 struct set_batch_flag_and_restore_page_info
272 set_batch_flag_and_restore_page_info ();
273 ~set_batch_flag_and_restore_page_info ();
275 DISABLE_COPY_AND_ASSIGN (set_batch_flag_and_restore_page_info);
279 /* Note that this doesn't use scoped_restore, because it's important
280 to control the ordering of operations in the destruction, and it
281 was simpler to avoid introducing a new ad hoc class. */
282 unsigned m_save_lines_per_page;
283 unsigned m_save_chars_per_line;
284 int m_save_batch_flag;
288 /* Path utilities. */
290 extern int gdb_filename_fnmatch (const char *pattern, const char *string,
293 extern void substitute_path_component (char **stringp, const char *from,
296 std::string ldirname (const char *filename);
298 extern int count_path_elements (const char *path);
300 extern const char *strip_leading_path_elements (const char *path, int n);
302 /* GDB output, ui_file utilities. */
306 extern int query (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
307 extern int nquery (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
308 extern int yquery (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
310 extern void begin_line (void);
312 extern void wrap_here (const char *);
314 extern void reinitialize_more_filter (void);
316 extern int pagination_enabled;
318 extern struct ui_file **current_ui_gdb_stdout_ptr (void);
319 extern struct ui_file **current_ui_gdb_stdin_ptr (void);
320 extern struct ui_file **current_ui_gdb_stderr_ptr (void);
321 extern struct ui_file **current_ui_gdb_stdlog_ptr (void);
323 /* The current top level's ui_file streams. */
326 #define gdb_stdout (*current_ui_gdb_stdout_ptr ())
328 #define gdb_stdin (*current_ui_gdb_stdin_ptr ())
329 /* Serious error notifications */
330 #define gdb_stderr (*current_ui_gdb_stderr_ptr ())
331 /* Log/debug/trace messages that should bypass normal stdout/stderr
332 filtering. For moment, always call this stream using
333 *_unfiltered. In the very near future that restriction shall be
334 removed - either call shall be unfiltered. (cagney 1999-06-13). */
335 #define gdb_stdlog (*current_ui_gdb_stdlog_ptr ())
337 /* Truly global ui_file streams. These are all defined in main.c. */
339 /* Target output that should bypass normal stdout/stderr filtering.
340 For moment, always call this stream using *_unfiltered. In the
341 very near future that restriction shall be removed - either call
342 shall be unfiltered. (cagney 1999-07-02). */
343 extern struct ui_file *gdb_stdtarg;
344 extern struct ui_file *gdb_stdtargerr;
345 extern struct ui_file *gdb_stdtargin;
347 /* Set the screen dimensions to WIDTH and HEIGHT. */
349 extern void set_screen_width_and_height (int width, int height);
351 /* More generic printf like operations. Filtered versions may return
352 non-locally on error. */
354 extern void fputs_filtered (const char *, struct ui_file *);
356 extern void fputs_unfiltered (const char *, struct ui_file *);
358 extern int fputc_filtered (int c, struct ui_file *);
360 extern int fputc_unfiltered (int c, struct ui_file *);
362 extern int putchar_filtered (int c);
364 extern int putchar_unfiltered (int c);
366 extern void puts_filtered (const char *);
368 extern void puts_unfiltered (const char *);
370 extern void puts_filtered_tabular (char *string, int width, int right);
372 extern void puts_debug (char *prefix, char *string, char *suffix);
374 extern void vprintf_filtered (const char *, va_list) ATTRIBUTE_PRINTF (1, 0);
376 extern void vfprintf_filtered (struct ui_file *, const char *, va_list)
377 ATTRIBUTE_PRINTF (2, 0);
379 extern void fprintf_filtered (struct ui_file *, const char *, ...)
380 ATTRIBUTE_PRINTF (2, 3);
382 extern void fprintfi_filtered (int, struct ui_file *, const char *, ...)
383 ATTRIBUTE_PRINTF (3, 4);
385 extern void printf_filtered (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
387 extern void printfi_filtered (int, const char *, ...) ATTRIBUTE_PRINTF (2, 3);
389 extern void vprintf_unfiltered (const char *, va_list) ATTRIBUTE_PRINTF (1, 0);
391 extern void vfprintf_unfiltered (struct ui_file *, const char *, va_list)
392 ATTRIBUTE_PRINTF (2, 0);
394 extern void fprintf_unfiltered (struct ui_file *, const char *, ...)
395 ATTRIBUTE_PRINTF (2, 3);
397 extern void printf_unfiltered (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
399 extern void print_spaces (int, struct ui_file *);
401 extern void print_spaces_filtered (int, struct ui_file *);
403 extern char *n_spaces (int);
405 extern void fputstr_filtered (const char *str, int quotr,
406 struct ui_file * stream);
408 extern void fputstr_unfiltered (const char *str, int quotr,
409 struct ui_file * stream);
411 extern void fputstrn_filtered (const char *str, int n, int quotr,
412 struct ui_file * stream);
414 typedef int (*do_fputc_ftype) (int c, ui_file *stream);
416 extern void fputstrn_unfiltered (const char *str, int n, int quotr,
417 do_fputc_ftype do_fputc,
418 struct ui_file * stream);
420 /* Return nonzero if filtered printing is initialized. */
421 extern int filtered_printing_initialized (void);
423 /* Like fprintf_filtered, but styles the output according to STYLE,
426 extern void fprintf_styled (struct ui_file *stream,
427 const ui_file_style &style,
430 ATTRIBUTE_PRINTF (3, 4);
432 /* Like fputs_filtered, but styles the output according to STYLE, when
435 extern void fputs_styled (const char *linebuffer,
436 const ui_file_style &style,
437 struct ui_file *stream);
439 /* Reset the terminal style to the default, if needed. */
441 extern void reset_terminal_style (struct ui_file *stream);
443 /* Display the host ADDR on STREAM formatted as ``0x%x''. */
444 extern void gdb_print_host_address_1 (const void *addr, struct ui_file *stream);
446 /* Wrapper that avoids adding a pointless cast to all callers. */
447 #define gdb_print_host_address(ADDR, STREAM) \
448 gdb_print_host_address_1 ((const void *) ADDR, STREAM)
450 /* Return the address only having significant bits. */
451 extern CORE_ADDR address_significant (gdbarch *gdbarch, CORE_ADDR addr);
453 /* Convert CORE_ADDR to string in platform-specific manner.
454 This is usually formatted similar to 0x%lx. */
455 extern const char *paddress (struct gdbarch *gdbarch, CORE_ADDR addr);
457 /* Return a string representation in hexadecimal notation of ADDRESS,
458 which is suitable for printing. */
460 extern const char *print_core_address (struct gdbarch *gdbarch,
463 /* Callback hash_f and eq_f for htab_create_alloc or htab_create_alloc_ex. */
464 extern hashval_t core_addr_hash (const void *ap);
465 extern int core_addr_eq (const void *ap, const void *bp);
467 extern CORE_ADDR string_to_core_addr (const char *my_string);
469 extern void fprintf_symbol_filtered (struct ui_file *, const char *,
472 extern void throw_perror_with_name (enum errors errcode, const char *string)
475 extern void perror_warning_with_name (const char *string);
477 extern void print_sys_errmsg (const char *, int);
479 /* Warnings and error messages. */
481 extern void (*deprecated_error_begin_hook) (void);
483 /* Message to be printed before the warning message, when a warning occurs. */
485 extern const char *warning_pre_print;
487 extern void error_stream (const string_file &) ATTRIBUTE_NORETURN;
489 extern void demangler_vwarning (const char *file, int line,
490 const char *, va_list ap)
491 ATTRIBUTE_PRINTF (3, 0);
493 extern void demangler_warning (const char *file, int line,
494 const char *, ...) ATTRIBUTE_PRINTF (3, 4);
497 /* Misc. utilities. */
499 /* Allocation and deallocation functions for the libiberty hash table
500 which use obstacks. */
501 void *hashtab_obstack_allocate (void *data, size_t size, size_t count);
502 void dummy_obstack_deallocate (void *object, void *data);
505 extern pid_t wait_to_die_with_timeout (pid_t pid, int *status, int timeout);
508 extern int myread (int, char *, int);
510 /* Resource limits used by getrlimit and setrlimit. */
512 enum resource_limit_kind
518 /* Check whether GDB will be able to dump core using the dump_core
519 function. Returns zero if GDB cannot or should not dump core.
520 If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected.
521 If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */
523 extern int can_dump_core (enum resource_limit_kind limit_kind);
525 /* Print a warning that we cannot dump core. */
527 extern void warn_cant_dump_core (const char *reason);
529 /* Dump core trying to increase the core soft limit to hard limit
532 extern void dump_core (void);
534 /* Return the hex string form of LENGTH bytes of DATA.
535 Space for the result is malloc'd, caller must free. */
537 extern char *make_hex_string (const gdb_byte *data, size_t length);
539 /* Copy NBITS bits from SOURCE to DEST starting at the given bit
540 offsets. Use the bit order as specified by BITS_BIG_ENDIAN.
541 Source and destination buffers must not overlap. */
543 extern void copy_bitwise (gdb_byte *dest, ULONGEST dest_offset,
544 const gdb_byte *source, ULONGEST source_offset,
545 ULONGEST nbits, int bits_big_endian);