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 struct section_addr_info;
246 extern struct cleanup *make_cleanup_free_section_addr_info
247 (struct section_addr_info *);
249 /* For make_cleanup_close see common/filestuff.h. */
252 extern struct cleanup *make_cleanup_unpush_target (struct target_ops *ops);
254 extern struct cleanup *make_cleanup_value_free_to_mark (struct value *);
256 /* A deleter for a hash table. */
259 void operator() (htab *ptr) const
265 /* A unique_ptr wrapper for htab_t. */
266 typedef std::unique_ptr<htab, htab_deleter> htab_up;
268 extern void free_current_contents (void *);
270 extern void init_page_info (void);
272 /* Temporarily set BATCH_FLAG and the associated unlimited terminal size.
273 Restore when destroyed. */
275 struct set_batch_flag_and_restore_page_info
279 set_batch_flag_and_restore_page_info ();
280 ~set_batch_flag_and_restore_page_info ();
282 DISABLE_COPY_AND_ASSIGN (set_batch_flag_and_restore_page_info);
286 /* Note that this doesn't use scoped_restore, because it's important
287 to control the ordering of operations in the destruction, and it
288 was simpler to avoid introducing a new ad hoc class. */
289 unsigned m_save_lines_per_page;
290 unsigned m_save_chars_per_line;
291 int m_save_batch_flag;
294 extern struct cleanup *make_bpstat_clear_actions_cleanup (void);
296 /* Path utilities. */
298 extern int gdb_filename_fnmatch (const char *pattern, const char *string,
301 extern void substitute_path_component (char **stringp, const char *from,
304 std::string ldirname (const char *filename);
306 extern int count_path_elements (const char *path);
308 extern const char *strip_leading_path_elements (const char *path, int n);
310 /* GDB output, ui_file utilities. */
314 extern int query (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
315 extern int nquery (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
316 extern int yquery (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
318 extern void begin_line (void);
320 extern void wrap_here (const char *);
322 extern void reinitialize_more_filter (void);
324 extern int pagination_enabled;
326 extern struct ui_file **current_ui_gdb_stdout_ptr (void);
327 extern struct ui_file **current_ui_gdb_stdin_ptr (void);
328 extern struct ui_file **current_ui_gdb_stderr_ptr (void);
329 extern struct ui_file **current_ui_gdb_stdlog_ptr (void);
331 /* The current top level's ui_file streams. */
334 #define gdb_stdout (*current_ui_gdb_stdout_ptr ())
336 #define gdb_stdin (*current_ui_gdb_stdin_ptr ())
337 /* Serious error notifications */
338 #define gdb_stderr (*current_ui_gdb_stderr_ptr ())
339 /* Log/debug/trace messages that should bypass normal stdout/stderr
340 filtering. For moment, always call this stream using
341 *_unfiltered. In the very near future that restriction shall be
342 removed - either call shall be unfiltered. (cagney 1999-06-13). */
343 #define gdb_stdlog (*current_ui_gdb_stdlog_ptr ())
345 /* Truly global ui_file streams. These are all defined in main.c. */
347 /* Target output that should bypass normal stdout/stderr filtering.
348 For moment, always call this stream using *_unfiltered. In the
349 very near future that restriction shall be removed - either call
350 shall be unfiltered. (cagney 1999-07-02). */
351 extern struct ui_file *gdb_stdtarg;
352 extern struct ui_file *gdb_stdtargerr;
353 extern struct ui_file *gdb_stdtargin;
355 /* Set the screen dimensions to WIDTH and HEIGHT. */
357 extern void set_screen_width_and_height (int width, int height);
359 /* More generic printf like operations. Filtered versions may return
360 non-locally on error. */
362 extern void fputs_filtered (const char *, struct ui_file *);
364 extern void fputs_unfiltered (const char *, struct ui_file *);
366 extern int fputc_filtered (int c, struct ui_file *);
368 extern int fputc_unfiltered (int c, struct ui_file *);
370 extern int putchar_filtered (int c);
372 extern int putchar_unfiltered (int c);
374 extern void puts_filtered (const char *);
376 extern void puts_unfiltered (const char *);
378 extern void puts_filtered_tabular (char *string, int width, int right);
380 extern void puts_debug (char *prefix, char *string, char *suffix);
382 extern void vprintf_filtered (const char *, va_list) ATTRIBUTE_PRINTF (1, 0);
384 extern void vfprintf_filtered (struct ui_file *, const char *, va_list)
385 ATTRIBUTE_PRINTF (2, 0);
387 extern void fprintf_filtered (struct ui_file *, const char *, ...)
388 ATTRIBUTE_PRINTF (2, 3);
390 extern void fprintfi_filtered (int, struct ui_file *, const char *, ...)
391 ATTRIBUTE_PRINTF (3, 4);
393 extern void printf_filtered (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
395 extern void printfi_filtered (int, const char *, ...) ATTRIBUTE_PRINTF (2, 3);
397 extern void vprintf_unfiltered (const char *, va_list) ATTRIBUTE_PRINTF (1, 0);
399 extern void vfprintf_unfiltered (struct ui_file *, const char *, va_list)
400 ATTRIBUTE_PRINTF (2, 0);
402 extern void fprintf_unfiltered (struct ui_file *, const char *, ...)
403 ATTRIBUTE_PRINTF (2, 3);
405 extern void printf_unfiltered (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
407 extern void print_spaces (int, struct ui_file *);
409 extern void print_spaces_filtered (int, struct ui_file *);
411 extern char *n_spaces (int);
413 extern void fputstr_filtered (const char *str, int quotr,
414 struct ui_file * stream);
416 extern void fputstr_unfiltered (const char *str, int quotr,
417 struct ui_file * stream);
419 extern void fputstrn_filtered (const char *str, int n, int quotr,
420 struct ui_file * stream);
422 extern void fputstrn_unfiltered (const char *str, int n, int quotr,
423 struct ui_file * stream);
425 /* Return nonzero if filtered printing is initialized. */
426 extern int filtered_printing_initialized (void);
428 /* Display the host ADDR on STREAM formatted as ``0x%x''. */
429 extern void gdb_print_host_address_1 (const void *addr, struct ui_file *stream);
431 /* Wrapper that avoids adding a pointless cast to all callers. */
432 #define gdb_print_host_address(ADDR, STREAM) \
433 gdb_print_host_address_1 ((const void *) ADDR, STREAM)
435 /* Return the address only having significant bits. */
436 extern CORE_ADDR address_significant (gdbarch *gdbarch, CORE_ADDR addr);
438 /* Convert CORE_ADDR to string in platform-specific manner.
439 This is usually formatted similar to 0x%lx. */
440 extern const char *paddress (struct gdbarch *gdbarch, CORE_ADDR addr);
442 /* Return a string representation in hexadecimal notation of ADDRESS,
443 which is suitable for printing. */
445 extern const char *print_core_address (struct gdbarch *gdbarch,
448 /* Callback hash_f and eq_f for htab_create_alloc or htab_create_alloc_ex. */
449 extern hashval_t core_addr_hash (const void *ap);
450 extern int core_addr_eq (const void *ap, const void *bp);
452 extern CORE_ADDR string_to_core_addr (const char *my_string);
454 extern void fprintf_symbol_filtered (struct ui_file *, const char *,
457 extern void throw_perror_with_name (enum errors errcode, const char *string)
460 extern void perror_warning_with_name (const char *string);
462 extern void print_sys_errmsg (const char *, int);
464 /* Warnings and error messages. */
466 extern void (*deprecated_error_begin_hook) (void);
468 /* Message to be printed before the warning message, when a warning occurs. */
470 extern const char *warning_pre_print;
472 extern void error_stream (const string_file &) ATTRIBUTE_NORETURN;
474 extern void demangler_vwarning (const char *file, int line,
475 const char *, va_list ap)
476 ATTRIBUTE_PRINTF (3, 0);
478 extern void demangler_warning (const char *file, int line,
479 const char *, ...) ATTRIBUTE_PRINTF (3, 4);
482 /* Misc. utilities. */
484 /* Allocation and deallocation functions for the libiberty hash table
485 which use obstacks. */
486 void *hashtab_obstack_allocate (void *data, size_t size, size_t count);
487 void dummy_obstack_deallocate (void *object, void *data);
490 extern pid_t wait_to_die_with_timeout (pid_t pid, int *status, int timeout);
493 extern int myread (int, char *, int);
495 /* Ensure that V is aligned to an N byte boundary (B's assumed to be a
496 power of 2). Round up/down when necessary. Examples of correct
499 addr = align_up (addr, 8); -- VALUE needs 8 byte alignment
500 write_memory (addr, value, len);
505 sp = align_down (sp - len, 16); -- Keep SP 16 byte aligned
506 write_memory (sp, value, len);
508 Note that uses such as:
510 write_memory (addr, value, len);
511 addr += align_up (len, 8);
515 sp -= align_up (len, 8);
516 write_memory (sp, value, len);
518 are typically not correct as they don't ensure that the address (SP
519 or ADDR) is correctly aligned (relying on previous alignment to
520 keep things right). This is also why the methods are called
521 "align_..." instead of "round_..." as the latter reads better with
522 this incorrect coding style. */
524 extern ULONGEST align_up (ULONGEST v, int n);
525 extern ULONGEST align_down (ULONGEST v, int n);
527 /* Resource limits used by getrlimit and setrlimit. */
529 enum resource_limit_kind
535 /* Check whether GDB will be able to dump core using the dump_core
536 function. Returns zero if GDB cannot or should not dump core.
537 If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected.
538 If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */
540 extern int can_dump_core (enum resource_limit_kind limit_kind);
542 /* Print a warning that we cannot dump core. */
544 extern void warn_cant_dump_core (const char *reason);
546 /* Dump core trying to increase the core soft limit to hard limit
549 extern void dump_core (void);
551 /* Return the hex string form of LENGTH bytes of DATA.
552 Space for the result is malloc'd, caller must free. */
554 extern char *make_hex_string (const gdb_byte *data, size_t length);