1 /* *INDENT-OFF* */ /* ATTRIBUTE_PRINTF confuses indent, avoid running it
3 /* I/O, string, cleanup, and other random utilities for GDB.
4 Copyright (C) 1986-2022 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/array-view.h"
26 #include "gdbsupport/scoped_restore.h"
33 struct completion_match_for_lcd;
36 /* String utilities. */
38 extern bool sevenbit_strings;
40 /* Modes of operation for strncmp_iw_with_mode. */
42 enum class strncmp_iw_mode
44 /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any
45 differences in whitespace. Returns 0 if they match, non-zero if
46 they don't (slightly different than strcmp()'s range of return
50 /* Like NORMAL, but also apply the strcmp_iw hack. I.e.,
51 string1=="FOO(PARAMS)" matches string2=="FOO". */
55 /* Helper for strcmp_iw and strncmp_iw. Exported so that languages
56 can implement both NORMAL and MATCH_PARAMS variants in a single
57 function and defer part of the work to strncmp_iw_with_mode.
59 LANGUAGE is used to implement some context-sensitive
60 language-specific comparisons. For example, for C++,
61 "string1=operator()" should not match "string2=operator" even in
64 MATCH_FOR_LCD is passed down so that the function can mark parts of
65 the symbol name as ignored for completion matching purposes (e.g.,
66 to handle abi tags). If IGNORE_TEMPLATE_PARAMS is true, all template
67 parameter lists will be ignored when language is C++. */
69 extern int strncmp_iw_with_mode
70 (const char *string1, const char *string2, size_t string2_len,
71 strncmp_iw_mode mode, enum language language,
72 completion_match_for_lcd *match_for_lcd = NULL,
73 bool ignore_template_params = false);
75 /* Do a strncmp() type operation on STRING1 and STRING2, ignoring any
76 differences in whitespace. STRING2_LEN is STRING2's length.
77 Returns 0 if STRING1 matches STRING2_LEN characters of STRING2,
78 non-zero otherwise (slightly different than strncmp()'s range of
79 return values). Note: passes language_minimal to
80 strncmp_iw_with_mode, and should therefore be avoided if a more
81 suitable language is available. */
82 extern int strncmp_iw (const char *string1, const char *string2,
85 /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any
86 differences in whitespace. Returns 0 if they match, non-zero if
87 they don't (slightly different than strcmp()'s range of return
90 As an extra hack, string1=="FOO(ARGS)" matches string2=="FOO".
91 This "feature" is useful when searching for matching C++ function
92 names (such as if the user types 'break FOO', where FOO is a
93 mangled C++ function).
95 Note: passes language_minimal to strncmp_iw_with_mode, and should
96 therefore be avoided if a more suitable language is available. */
97 extern int strcmp_iw (const char *string1, const char *string2);
99 extern int strcmp_iw_ordered (const char *, const char *);
101 /* Return true if the strings are equal. */
103 extern bool streq (const char *, const char *);
105 extern int subset_compare (const char *, const char *);
107 /* Compare C strings for std::sort. */
110 compare_cstrings (const char *str1, const char *str2)
112 return strcmp (str1, str2) < 0;
115 /* Reset the prompt_for_continue clock. */
116 void reset_prompt_for_continue_wait_time (void);
117 /* Return the time spent in prompt_for_continue. */
118 std::chrono::steady_clock::duration get_prompt_for_continue_wait_time ();
120 /* Parsing utilities. */
122 extern int parse_pid_to_attach (const char *args);
124 extern int parse_escape (struct gdbarch *, const char **);
127 /* Cleanup utilities. */
129 extern void init_page_info (void);
131 /* Temporarily set BATCH_FLAG and the associated unlimited terminal size.
132 Restore when destroyed. */
134 struct set_batch_flag_and_restore_page_info
138 set_batch_flag_and_restore_page_info ();
139 ~set_batch_flag_and_restore_page_info ();
141 DISABLE_COPY_AND_ASSIGN (set_batch_flag_and_restore_page_info);
145 /* Note that this doesn't use scoped_restore, because it's important
146 to control the ordering of operations in the destruction, and it
147 was simpler to avoid introducing a new ad hoc class. */
148 unsigned m_save_lines_per_page;
149 unsigned m_save_chars_per_line;
150 int m_save_batch_flag;
154 /* Path utilities. */
156 extern int gdb_filename_fnmatch (const char *pattern, const char *string,
159 extern void substitute_path_component (char **stringp, const char *from,
162 std::string ldirname (const char *filename);
164 extern int count_path_elements (const char *path);
166 extern const char *strip_leading_path_elements (const char *path, int n);
168 /* GDB output, ui_file utilities. */
172 extern int query (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
173 extern int nquery (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
174 extern int yquery (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
176 extern void begin_line (void);
178 extern void wrap_here (int);
180 extern void reinitialize_more_filter (void);
182 /* Return the number of characters in a line. */
184 extern int get_chars_per_line ();
186 extern bool pagination_enabled;
188 /* A flag indicating whether to timestamp debugging messages. */
189 extern bool debug_timestamp;
191 extern struct ui_file **current_ui_gdb_stdout_ptr (void);
192 extern struct ui_file **current_ui_gdb_stdin_ptr (void);
193 extern struct ui_file **current_ui_gdb_stderr_ptr (void);
194 extern struct ui_file **current_ui_gdb_stdlog_ptr (void);
196 /* Flush STREAM. This is a wrapper for ui_file_flush that also
197 flushes any output pending from uses of the *_filtered output
198 functions; that output is kept in a special buffer so that
199 pagination and styling are handled properly. */
200 extern void gdb_flush (struct ui_file *);
202 /* The current top level's ui_file streams. */
205 #define gdb_stdout (*current_ui_gdb_stdout_ptr ())
207 #define gdb_stdin (*current_ui_gdb_stdin_ptr ())
208 /* Serious error notifications */
209 #define gdb_stderr (*current_ui_gdb_stderr_ptr ())
210 /* Log/debug/trace messages that should bypass normal stdout/stderr
211 filtering. For moment, always call this stream using
212 *_unfiltered. In the very near future that restriction shall be
213 removed - either call shall be unfiltered. (cagney 1999-06-13). */
214 #define gdb_stdlog (*current_ui_gdb_stdlog_ptr ())
216 /* Truly global ui_file streams. These are all defined in main.c. */
218 /* Target output that should bypass normal stdout/stderr filtering.
219 For moment, always call this stream using *_unfiltered. In the
220 very near future that restriction shall be removed - either call
221 shall be unfiltered. (cagney 1999-07-02). */
222 extern struct ui_file *gdb_stdtarg;
223 extern struct ui_file *gdb_stdtargerr;
224 extern struct ui_file *gdb_stdtargin;
226 /* Set the screen dimensions to WIDTH and HEIGHT. */
228 extern void set_screen_width_and_height (int width, int height);
230 /* More generic printf like operations. Filtered versions may return
231 non-locally on error. As an extension over plain printf, these
232 support some GDB-specific format specifiers. Particularly useful
233 here are the styling formatters: '%p[', '%p]' and '%ps'. See
234 ui_out::message for details. */
236 extern void gdb_puts (const char *, struct ui_file *);
238 extern int gdb_putc (int c, struct ui_file *);
240 extern int gdb_putc (int c);
242 extern void gdb_puts (const char *);
244 extern void puts_filtered_tabular (char *string, int width, int right);
246 extern void gdb_vprintf (const char *, va_list) ATTRIBUTE_PRINTF (1, 0);
248 extern void gdb_vprintf (struct ui_file *, const char *, va_list)
249 ATTRIBUTE_PRINTF (2, 0);
251 extern void gdb_printf (struct ui_file *, const char *, ...)
252 ATTRIBUTE_PRINTF (2, 3);
254 extern void gdb_printf (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
256 extern void printf_unfiltered (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
258 extern void print_spaces_filtered (int, struct ui_file *);
260 extern const char *n_spaces (int);
262 /* Return nonzero if filtered printing is initialized. */
263 extern int filtered_printing_initialized (void);
265 /* Like gdb_printf, but styles the output according to STYLE,
268 extern void fprintf_styled (struct ui_file *stream,
269 const ui_file_style &style,
272 ATTRIBUTE_PRINTF (3, 4);
274 extern void vfprintf_styled (struct ui_file *stream,
275 const ui_file_style &style,
278 ATTRIBUTE_PRINTF (3, 0);
280 /* Like gdb_puts, but styles the output according to STYLE, when
283 extern void fputs_styled (const char *linebuffer,
284 const ui_file_style &style,
285 struct ui_file *stream);
287 /* Like fputs_styled, but uses highlight_style to highlight the
288 parts of STR that match HIGHLIGHT. */
290 extern void fputs_highlighted (const char *str, const compiled_regex &highlight,
291 struct ui_file *stream);
293 /* Return the address only having significant bits. */
294 extern CORE_ADDR address_significant (gdbarch *gdbarch, CORE_ADDR addr);
296 /* Convert CORE_ADDR to string in platform-specific manner.
297 This is usually formatted similar to 0x%lx. */
298 extern const char *paddress (struct gdbarch *gdbarch, CORE_ADDR addr);
300 /* Return a string representation in hexadecimal notation of ADDRESS,
301 which is suitable for printing. */
303 extern const char *print_core_address (struct gdbarch *gdbarch,
306 extern CORE_ADDR string_to_core_addr (const char *my_string);
308 extern void fprintf_symbol_filtered (struct ui_file *, const char *,
311 extern void throw_perror_with_name (enum errors errcode, const char *string)
314 extern void perror_warning_with_name (const char *string);
316 extern void print_sys_errmsg (const char *, int);
318 /* Warnings and error messages. */
320 extern void (*deprecated_error_begin_hook) (void);
322 /* Message to be printed before the warning message, when a warning occurs. */
324 extern const char *warning_pre_print;
326 extern void error_stream (const string_file &) ATTRIBUTE_NORETURN;
328 extern void demangler_vwarning (const char *file, int line,
329 const char *, va_list ap)
330 ATTRIBUTE_PRINTF (3, 0);
332 extern void demangler_warning (const char *file, int line,
333 const char *, ...) ATTRIBUTE_PRINTF (3, 4);
336 /* Misc. utilities. */
339 extern pid_t wait_to_die_with_timeout (pid_t pid, int *status, int timeout);
342 extern int myread (int, char *, int);
344 /* Integer exponentiation: Return V1**V2, where both arguments
347 Requires V1 != 0 if V2 < 0.
348 Returns 1 for 0 ** 0. */
349 extern ULONGEST uinteger_pow (ULONGEST v1, LONGEST v2);
351 /* Resource limits used by getrlimit and setrlimit. */
353 enum resource_limit_kind
359 /* Check whether GDB will be able to dump core using the dump_core
360 function. Returns zero if GDB cannot or should not dump core.
361 If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected.
362 If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */
364 extern int can_dump_core (enum resource_limit_kind limit_kind);
366 /* Print a warning that we cannot dump core. */
368 extern void warn_cant_dump_core (const char *reason);
370 /* Dump core trying to increase the core soft limit to hard limit
373 extern void dump_core (void);
375 /* Copy NBITS bits from SOURCE to DEST starting at the given bit
376 offsets. Use the bit order as specified by BITS_BIG_ENDIAN.
377 Source and destination buffers must not overlap. */
379 extern void copy_bitwise (gdb_byte *dest, ULONGEST dest_offset,
380 const gdb_byte *source, ULONGEST source_offset,
381 ULONGEST nbits, int bits_big_endian);
383 /* A fast hashing function. This can be used to hash data in a fast way
384 when the length is known. If no fast hashing library is available, falls
385 back to iterative_hash from libiberty. START_VALUE can be set to
386 continue hashing from a previous value. */
388 static inline unsigned int
389 fast_hash (const void *ptr, size_t len, unsigned int start_value = 0)
391 #ifdef HAVE_LIBXXHASH
392 return XXH64 (ptr, len, start_value);
394 return iterative_hash (ptr, len, start_value);