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 extern void initialize_utils (void);
33 /* String utilities. */
35 extern int sevenbit_strings;
37 /* Modes of operation for strncmp_iw_with_mode. */
39 enum class strncmp_iw_mode
41 /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any
42 differences in whitespace. Returns 0 if they match, non-zero if
43 they don't (slightly different than strcmp()'s range of return
47 /* Like NORMAL, but also apply the strcmp_iw hack. I.e.,
48 string1=="FOO(PARAMS)" matches string2=="FOO". */
52 /* Helper for strcmp_iw and strncmp_iw. Exported so that languages
53 can implement both NORMAL and MATCH_PARAMS variants in a single
54 function and defer part of the work to strncmp_iw_with_mode.
56 LANGUAGE is used to implement some context-sensitive
57 language-specific comparisons. For example, for C++,
58 "string1=operator()" should not match "string2=operator" even in
61 MATCH_FOR_LCD is passed down so that the function can mark parts of
62 the symbol name as ignored for completion matching purposes (e.g.,
63 to handle abi tags). */
64 extern int strncmp_iw_with_mode
65 (const char *string1, const char *string2, size_t string2_len,
66 strncmp_iw_mode mode, enum language language,
67 completion_match_for_lcd *match_for_lcd = NULL);
69 /* Do a strncmp() type operation on STRING1 and STRING2, ignoring any
70 differences in whitespace. STRING2_LEN is STRING2's length.
71 Returns 0 if STRING1 matches STRING2_LEN characters of STRING2,
72 non-zero otherwise (slightly different than strncmp()'s range of
73 return values). Note: passes language_minimal to
74 strncmp_iw_with_mode, and should therefore be avoided if a more
75 suitable language is available. */
76 extern int strncmp_iw (const char *string1, const char *string2,
79 /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any
80 differences in whitespace. Returns 0 if they match, non-zero if
81 they don't (slightly different than strcmp()'s range of return
84 As an extra hack, string1=="FOO(ARGS)" matches string2=="FOO".
85 This "feature" is useful when searching for matching C++ function
86 names (such as if the user types 'break FOO', where FOO is a
87 mangled C++ function).
89 Note: passes language_minimal to strncmp_iw_with_mode, and should
90 therefore be avoided if a more suitable language is available. */
91 extern int strcmp_iw (const char *string1, const char *string2);
93 extern int strcmp_iw_ordered (const char *, const char *);
95 /* Return true if the strings are equal. */
97 extern bool streq (const char *, const char *);
99 /* A variant of streq that is suitable for use as an htab
102 extern int streq_hash (const void *, const void *);
104 extern int subset_compare (const char *, const char *);
106 int compare_positive_ints (const void *ap, const void *bp);
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 utilites. */
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 int 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. */
357 extern void fputs_filtered (const char *, struct ui_file *);
359 extern void fputs_unfiltered (const char *, struct ui_file *);
361 extern int fputc_filtered (int c, struct ui_file *);
363 extern int fputc_unfiltered (int c, struct ui_file *);
365 extern int putchar_filtered (int c);
367 extern int putchar_unfiltered (int c);
369 extern void puts_filtered (const char *);
371 extern void puts_unfiltered (const char *);
373 extern void puts_filtered_tabular (char *string, int width, int right);
375 extern void puts_debug (char *prefix, char *string, char *suffix);
377 extern void vprintf_filtered (const char *, va_list) ATTRIBUTE_PRINTF (1, 0);
379 extern void vfprintf_filtered (struct ui_file *, const char *, va_list)
380 ATTRIBUTE_PRINTF (2, 0);
382 extern void fprintf_filtered (struct ui_file *, const char *, ...)
383 ATTRIBUTE_PRINTF (2, 3);
385 extern void fprintfi_filtered (int, struct ui_file *, const char *, ...)
386 ATTRIBUTE_PRINTF (3, 4);
388 extern void printf_filtered (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
390 extern void printfi_filtered (int, const char *, ...) ATTRIBUTE_PRINTF (2, 3);
392 extern void vprintf_unfiltered (const char *, va_list) ATTRIBUTE_PRINTF (1, 0);
394 extern void vfprintf_unfiltered (struct ui_file *, const char *, va_list)
395 ATTRIBUTE_PRINTF (2, 0);
397 extern void fprintf_unfiltered (struct ui_file *, const char *, ...)
398 ATTRIBUTE_PRINTF (2, 3);
400 extern void printf_unfiltered (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
402 extern void print_spaces (int, struct ui_file *);
404 extern void print_spaces_filtered (int, struct ui_file *);
406 extern char *n_spaces (int);
408 extern void fputstr_filtered (const char *str, int quotr,
409 struct ui_file * stream);
411 extern void fputstr_unfiltered (const char *str, int quotr,
412 struct ui_file * stream);
414 extern void fputstrn_filtered (const char *str, int n, int quotr,
415 struct ui_file * stream);
417 typedef int (*do_fputc_ftype) (int c, ui_file *stream);
419 extern void fputstrn_unfiltered (const char *str, int n, int quotr,
420 do_fputc_ftype do_fputc,
421 struct ui_file * stream);
423 /* Return nonzero if filtered printing is initialized. */
424 extern int filtered_printing_initialized (void);
426 /* Like fprintf_filtered, but styles the output according to STYLE,
429 extern void fprintf_styled (struct ui_file *stream,
430 const ui_file_style &style,
433 ATTRIBUTE_PRINTF (3, 4);
435 /* Like fputs_filtered, but styles the output according to STYLE, when
438 extern void fputs_styled (const char *linebuffer,
439 const ui_file_style &style,
440 struct ui_file *stream);
442 /* Like fputs_styled, but uses highlight_style to highlight the
443 parts of STR that match HIGHLIGHT. */
445 extern void fputs_highlighted (const char *str, const compiled_regex &highlight,
446 struct ui_file *stream);
448 /* Reset the terminal style to the default, if needed. */
450 extern void reset_terminal_style (struct ui_file *stream);
452 /* Display the host ADDR on STREAM formatted as ``0x%x''. */
453 extern void gdb_print_host_address_1 (const void *addr, struct ui_file *stream);
455 /* Wrapper that avoids adding a pointless cast to all callers. */
456 #define gdb_print_host_address(ADDR, STREAM) \
457 gdb_print_host_address_1 ((const void *) ADDR, STREAM)
459 /* Return the address only having significant bits. */
460 extern CORE_ADDR address_significant (gdbarch *gdbarch, CORE_ADDR addr);
462 /* Convert CORE_ADDR to string in platform-specific manner.
463 This is usually formatted similar to 0x%lx. */
464 extern const char *paddress (struct gdbarch *gdbarch, CORE_ADDR addr);
466 /* Return a string representation in hexadecimal notation of ADDRESS,
467 which is suitable for printing. */
469 extern const char *print_core_address (struct gdbarch *gdbarch,
472 /* Callback hash_f and eq_f for htab_create_alloc or htab_create_alloc_ex. */
473 extern hashval_t core_addr_hash (const void *ap);
474 extern int core_addr_eq (const void *ap, const void *bp);
476 extern CORE_ADDR string_to_core_addr (const char *my_string);
478 extern void fprintf_symbol_filtered (struct ui_file *, const char *,
481 extern void throw_perror_with_name (enum errors errcode, const char *string)
484 extern void perror_warning_with_name (const char *string);
486 extern void print_sys_errmsg (const char *, int);
488 /* Warnings and error messages. */
490 extern void (*deprecated_error_begin_hook) (void);
492 /* Message to be printed before the warning message, when a warning occurs. */
494 extern const char *warning_pre_print;
496 extern void error_stream (const string_file &) ATTRIBUTE_NORETURN;
498 extern void demangler_vwarning (const char *file, int line,
499 const char *, va_list ap)
500 ATTRIBUTE_PRINTF (3, 0);
502 extern void demangler_warning (const char *file, int line,
503 const char *, ...) ATTRIBUTE_PRINTF (3, 4);
506 /* Misc. utilities. */
508 /* Allocation and deallocation functions for the libiberty hash table
509 which use obstacks. */
510 void *hashtab_obstack_allocate (void *data, size_t size, size_t count);
511 void dummy_obstack_deallocate (void *object, void *data);
514 extern pid_t wait_to_die_with_timeout (pid_t pid, int *status, int timeout);
517 extern int myread (int, char *, int);
519 /* Resource limits used by getrlimit and setrlimit. */
521 enum resource_limit_kind
527 /* Check whether GDB will be able to dump core using the dump_core
528 function. Returns zero if GDB cannot or should not dump core.
529 If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected.
530 If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */
532 extern int can_dump_core (enum resource_limit_kind limit_kind);
534 /* Print a warning that we cannot dump core. */
536 extern void warn_cant_dump_core (const char *reason);
538 /* Dump core trying to increase the core soft limit to hard limit
541 extern void dump_core (void);
543 /* Return the hex string form of LENGTH bytes of DATA.
544 Space for the result is malloc'd, caller must free. */
546 extern char *make_hex_string (const gdb_byte *data, size_t length);
548 /* Copy NBITS bits from SOURCE to DEST starting at the given bit
549 offsets. Use the bit order as specified by BITS_BIG_ENDIAN.
550 Source and destination buffers must not overlap. */
552 extern void copy_bitwise (gdb_byte *dest, ULONGEST dest_offset,
553 const gdb_byte *source, ULONGEST source_offset,
554 ULONGEST nbits, int bits_big_endian);