1 /* *INDENT-OFF* */ /* ATTRIBUTE_PRINTF confuses indent, avoid running it
3 /* I/O, string, cleanup, and other random utilities for GDB.
4 Copyright (C) 1986-2018 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 extern int streq (const char *, const char *);
94 extern int subset_compare (const char *, const char *);
96 int compare_positive_ints (const void *ap, const void *bp);
97 int compare_strings (const void *ap, const void *bp);
99 /* Compare C strings for std::sort. */
102 compare_cstrings (const char *str1, const char *str2)
104 return strcmp (str1, str2) < 0;
107 /* A wrapper for bfd_errmsg to produce a more helpful error message
108 in the case of bfd_error_file_ambiguously recognized.
109 MATCHING, if non-NULL, is the corresponding argument to
110 bfd_check_format_matches, and will be freed. */
112 extern const char *gdb_bfd_errmsg (bfd_error_type error_tag, char **matching);
114 /* Reset the prompt_for_continue clock. */
115 void reset_prompt_for_continue_wait_time (void);
116 /* Return the time spent in prompt_for_continue. */
117 std::chrono::steady_clock::duration get_prompt_for_continue_wait_time ();
119 /* Parsing utilites. */
121 extern int parse_pid_to_attach (const char *args);
123 extern int parse_escape (struct gdbarch *, const char **);
125 /* A wrapper for an array of char* that was allocated in the way that
126 'buildargv' does, and should be freed with 'freeargv'. */
132 /* A constructor that initializes to NULL. */
139 /* A constructor that calls buildargv on STR. STR may be NULL, in
140 which case this object is initialized with a NULL array. If
141 buildargv fails due to out-of-memory, call malloc_failure.
142 Therefore, the value is guaranteed to be non-NULL, unless the
143 parameter itself is NULL. */
145 explicit gdb_argv (const char *str)
151 /* A constructor that takes ownership of an existing array. */
153 explicit gdb_argv (char **array)
158 gdb_argv (const gdb_argv &) = delete;
159 gdb_argv &operator= (const gdb_argv &) = delete;
166 /* Call buildargv on STR, storing the result in this object. Any
167 previous state is freed. STR may be NULL, in which case this
168 object is reset with a NULL array. If buildargv fails due to
169 out-of-memory, call malloc_failure. Therefore, the value is
170 guaranteed to be non-NULL, unless the parameter itself is
173 void reset (const char *str);
175 /* Return the underlying array. */
182 /* Return the underlying array, transferring ownership to the
187 char **result = m_argv;
192 /* Return the number of items in the array. */
196 return countargv (m_argv);
199 /* Index into the array. */
201 char *operator[] (int arg)
203 gdb_assert (m_argv != NULL);
207 /* The iterator type. */
209 typedef char **iterator;
211 /* Return an iterator pointing to the start of the array. */
218 /* Return an iterator pointing to the end of the array. */
222 return m_argv + count ();
225 bool operator!= (std::nullptr_t)
227 return m_argv != NULL;
230 bool operator== (std::nullptr_t)
232 return m_argv == NULL;
237 /* The wrapped array. */
243 /* Cleanup utilities. */
245 /* For make_cleanup_close see common/filestuff.h. */
248 extern struct cleanup *make_cleanup_unpush_target (struct target_ops *ops);
250 extern struct cleanup *make_cleanup_value_free_to_mark (struct value *);
252 /* A deleter for a hash table. */
255 void operator() (htab *ptr) const
261 /* A unique_ptr wrapper for htab_t. */
262 typedef std::unique_ptr<htab, htab_deleter> htab_up;
264 extern void free_current_contents (void *);
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;
290 extern struct cleanup *make_bpstat_clear_actions_cleanup (void);
292 /* Path utilities. */
294 extern int gdb_filename_fnmatch (const char *pattern, const char *string,
297 extern void substitute_path_component (char **stringp, const char *from,
300 std::string ldirname (const char *filename);
302 extern int count_path_elements (const char *path);
304 extern const char *strip_leading_path_elements (const char *path, int n);
306 /* GDB output, ui_file utilities. */
310 extern int query (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
311 extern int nquery (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
312 extern int yquery (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
314 extern void begin_line (void);
316 extern void wrap_here (const char *);
318 extern void reinitialize_more_filter (void);
320 extern int pagination_enabled;
322 extern struct ui_file **current_ui_gdb_stdout_ptr (void);
323 extern struct ui_file **current_ui_gdb_stdin_ptr (void);
324 extern struct ui_file **current_ui_gdb_stderr_ptr (void);
325 extern struct ui_file **current_ui_gdb_stdlog_ptr (void);
327 /* The current top level's ui_file streams. */
330 #define gdb_stdout (*current_ui_gdb_stdout_ptr ())
332 #define gdb_stdin (*current_ui_gdb_stdin_ptr ())
333 /* Serious error notifications */
334 #define gdb_stderr (*current_ui_gdb_stderr_ptr ())
335 /* Log/debug/trace messages that should bypass normal stdout/stderr
336 filtering. For moment, always call this stream using
337 *_unfiltered. In the very near future that restriction shall be
338 removed - either call shall be unfiltered. (cagney 1999-06-13). */
339 #define gdb_stdlog (*current_ui_gdb_stdlog_ptr ())
341 /* Truly global ui_file streams. These are all defined in main.c. */
343 /* Target output that should bypass normal stdout/stderr filtering.
344 For moment, always call this stream using *_unfiltered. In the
345 very near future that restriction shall be removed - either call
346 shall be unfiltered. (cagney 1999-07-02). */
347 extern struct ui_file *gdb_stdtarg;
348 extern struct ui_file *gdb_stdtargerr;
349 extern struct ui_file *gdb_stdtargin;
351 /* Set the screen dimensions to WIDTH and HEIGHT. */
353 extern void set_screen_width_and_height (int width, int height);
355 /* More generic printf like operations. Filtered versions may return
356 non-locally on error. */
358 extern void fputs_filtered (const char *, struct ui_file *);
360 extern void fputs_unfiltered (const char *, struct ui_file *);
362 extern int fputc_filtered (int c, struct ui_file *);
364 extern int fputc_unfiltered (int c, struct ui_file *);
366 extern int putchar_filtered (int c);
368 extern int putchar_unfiltered (int c);
370 extern void puts_filtered (const char *);
372 extern void puts_unfiltered (const char *);
374 extern void puts_filtered_tabular (char *string, int width, int right);
376 extern void puts_debug (char *prefix, char *string, char *suffix);
378 extern void vprintf_filtered (const char *, va_list) ATTRIBUTE_PRINTF (1, 0);
380 extern void vfprintf_filtered (struct ui_file *, const char *, va_list)
381 ATTRIBUTE_PRINTF (2, 0);
383 extern void fprintf_filtered (struct ui_file *, const char *, ...)
384 ATTRIBUTE_PRINTF (2, 3);
386 extern void fprintfi_filtered (int, struct ui_file *, const char *, ...)
387 ATTRIBUTE_PRINTF (3, 4);
389 extern void printf_filtered (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
391 extern void printfi_filtered (int, const char *, ...) ATTRIBUTE_PRINTF (2, 3);
393 extern void vprintf_unfiltered (const char *, va_list) ATTRIBUTE_PRINTF (1, 0);
395 extern void vfprintf_unfiltered (struct ui_file *, const char *, va_list)
396 ATTRIBUTE_PRINTF (2, 0);
398 extern void fprintf_unfiltered (struct ui_file *, const char *, ...)
399 ATTRIBUTE_PRINTF (2, 3);
401 extern void printf_unfiltered (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
403 extern void print_spaces (int, struct ui_file *);
405 extern void print_spaces_filtered (int, struct ui_file *);
407 extern char *n_spaces (int);
409 extern void fputstr_filtered (const char *str, int quotr,
410 struct ui_file * stream);
412 extern void fputstr_unfiltered (const char *str, int quotr,
413 struct ui_file * stream);
415 extern void fputstrn_filtered (const char *str, int n, int quotr,
416 struct ui_file * stream);
418 extern void fputstrn_unfiltered (const char *str, int n, int quotr,
419 struct ui_file * stream);
421 /* Return nonzero if filtered printing is initialized. */
422 extern int filtered_printing_initialized (void);
424 /* Display the host ADDR on STREAM formatted as ``0x%x''. */
425 extern void gdb_print_host_address_1 (const void *addr, struct ui_file *stream);
427 /* Wrapper that avoids adding a pointless cast to all callers. */
428 #define gdb_print_host_address(ADDR, STREAM) \
429 gdb_print_host_address_1 ((const void *) ADDR, STREAM)
431 /* Return the address only having significant bits. */
432 extern CORE_ADDR address_significant (gdbarch *gdbarch, CORE_ADDR addr);
434 /* Convert CORE_ADDR to string in platform-specific manner.
435 This is usually formatted similar to 0x%lx. */
436 extern const char *paddress (struct gdbarch *gdbarch, CORE_ADDR addr);
438 /* Return a string representation in hexadecimal notation of ADDRESS,
439 which is suitable for printing. */
441 extern const char *print_core_address (struct gdbarch *gdbarch,
444 /* Callback hash_f and eq_f for htab_create_alloc or htab_create_alloc_ex. */
445 extern hashval_t core_addr_hash (const void *ap);
446 extern int core_addr_eq (const void *ap, const void *bp);
448 extern CORE_ADDR string_to_core_addr (const char *my_string);
450 extern void fprintf_symbol_filtered (struct ui_file *, const char *,
453 extern void throw_perror_with_name (enum errors errcode, const char *string)
456 extern void perror_warning_with_name (const char *string);
458 extern void print_sys_errmsg (const char *, int);
460 /* Warnings and error messages. */
462 extern void (*deprecated_error_begin_hook) (void);
464 /* Message to be printed before the warning message, when a warning occurs. */
466 extern const char *warning_pre_print;
468 extern void error_stream (const string_file &) ATTRIBUTE_NORETURN;
470 extern void demangler_vwarning (const char *file, int line,
471 const char *, va_list ap)
472 ATTRIBUTE_PRINTF (3, 0);
474 extern void demangler_warning (const char *file, int line,
475 const char *, ...) ATTRIBUTE_PRINTF (3, 4);
478 /* Misc. utilities. */
480 /* Allocation and deallocation functions for the libiberty hash table
481 which use obstacks. */
482 void *hashtab_obstack_allocate (void *data, size_t size, size_t count);
483 void dummy_obstack_deallocate (void *object, void *data);
486 extern pid_t wait_to_die_with_timeout (pid_t pid, int *status, int timeout);
489 extern int myread (int, char *, int);
491 /* Ensure that V is aligned to an N byte boundary (B's assumed to be a
492 power of 2). Round up/down when necessary. Examples of correct
495 addr = align_up (addr, 8); -- VALUE needs 8 byte alignment
496 write_memory (addr, value, len);
501 sp = align_down (sp - len, 16); -- Keep SP 16 byte aligned
502 write_memory (sp, value, len);
504 Note that uses such as:
506 write_memory (addr, value, len);
507 addr += align_up (len, 8);
511 sp -= align_up (len, 8);
512 write_memory (sp, value, len);
514 are typically not correct as they don't ensure that the address (SP
515 or ADDR) is correctly aligned (relying on previous alignment to
516 keep things right). This is also why the methods are called
517 "align_..." instead of "round_..." as the latter reads better with
518 this incorrect coding style. */
520 extern ULONGEST align_up (ULONGEST v, int n);
521 extern ULONGEST align_down (ULONGEST v, int n);
523 /* Resource limits used by getrlimit and setrlimit. */
525 enum resource_limit_kind
531 /* Check whether GDB will be able to dump core using the dump_core
532 function. Returns zero if GDB cannot or should not dump core.
533 If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected.
534 If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */
536 extern int can_dump_core (enum resource_limit_kind limit_kind);
538 /* Print a warning that we cannot dump core. */
540 extern void warn_cant_dump_core (const char *reason);
542 /* Dump core trying to increase the core soft limit to hard limit
545 extern void dump_core (void);
547 /* Return the hex string form of LENGTH bytes of DATA.
548 Space for the result is malloc'd, caller must free. */
550 extern char *make_hex_string (const gdb_byte *data, size_t length);