1 /* Declarations for value printing routines for GDB, the GNU debugger.
3 Copyright (C) 1986-2021 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "cli/cli-option.h"
25 /* This is used to pass formatting options to various value-printing
27 struct value_print_options
29 /* Pretty-formatting control. */
30 enum val_prettyformat prettyformat
;
32 /* Controls pretty formatting of arrays. */
33 bool prettyformat_arrays
;
35 /* Controls pretty formatting of structures. */
36 bool prettyformat_structs
;
38 /* Controls printing of virtual tables. */
41 /* Controls printing of nested unions. */
44 /* Controls printing of addresses. */
47 /* Controls looking up an object's derived type using what we find
51 /* Maximum number of chars to print for a string pointer value or vector
52 contents, or UINT_MAX for no limit. Note that "set print elements 0"
53 stores UINT_MAX in print_max, which displays in a show command as
55 unsigned int print_max
;
57 /* Print repeat counts if there are more than this many repetitions
58 of an element in an array. */
59 unsigned int repeat_count_threshold
;
61 /* The global output format letter. */
64 /* The current format letter. This is set locally for a given call,
65 e.g. when the user passes a format to "print". */
68 /* Print memory tag violations for pointers. */
69 bool memory_tag_violations
;
71 /* Stop printing at null character? */
72 bool stop_print_at_null
;
74 /* True if we should print the index of each element when printing
76 bool print_array_indexes
;
78 /* If true, then dereference references, otherwise just print
79 them like pointers. */
82 /* If true, print static fields. */
83 bool static_field_print
;
85 /* If true, print static fields for Pascal. FIXME: C++ has a
86 flag, why not share with Pascal too? */
87 bool pascal_static_field_print
;
89 /* If true, don't do Python pretty-printing. */
92 /* If true, print the value in "summary" form.
93 If raw and summary are both true, don't print non-scalar values
94 ("..." is printed instead). */
97 /* If true, when printing a pointer, print the symbol to which it
101 /* Maximum print depth when printing nested aggregates. */
104 /* Whether "finish" should print the value. */
108 /* Create an option_def_group for the value_print options, with OPTS
110 extern gdb::option::option_def_group make_value_print_options_def_group
111 (value_print_options
*opts
);
113 /* The global print options set by the user. In general this should
114 not be directly accessed, except by set/show commands. Ordinary
115 code should call get_user_print_options instead. */
116 extern struct value_print_options user_print_options
;
118 /* Initialize *OPTS to be a copy of the user print options. */
119 extern void get_user_print_options (struct value_print_options
*opts
);
121 /* Initialize *OPTS to be a copy of the user print options, but with
122 pretty-formatting disabled. */
123 extern void get_no_prettyformat_print_options (struct value_print_options
*);
125 /* Initialize *OPTS to be a copy of the user print options, but using
126 FORMAT as the formatting option. */
127 extern void get_formatted_print_options (struct value_print_options
*opts
,
130 extern void maybe_print_array_index (struct type
*index_type
, LONGEST index
,
131 struct ui_file
*stream
,
132 const struct value_print_options
*);
135 /* Print elements of an array. */
137 extern void value_print_array_elements (struct value
*, struct ui_file
*, int,
138 const struct value_print_options
*,
141 /* Print a scalar according to OPTIONS and SIZE on STREAM. Format 'i'
142 is not supported at this level.
144 This is how the elements of an array or structure are printed
147 extern void value_print_scalar_formatted
148 (struct value
*val
, const struct value_print_options
*options
,
149 int size
, struct ui_file
*stream
);
151 extern void print_binary_chars (struct ui_file
*, const gdb_byte
*,
152 unsigned int, enum bfd_endian
, bool);
154 extern void print_octal_chars (struct ui_file
*, const gdb_byte
*,
155 unsigned int, enum bfd_endian
);
157 extern void print_decimal_chars (struct ui_file
*, const gdb_byte
*,
158 unsigned int, bool, enum bfd_endian
);
160 extern void print_hex_chars (struct ui_file
*, const gdb_byte
*,
161 unsigned int, enum bfd_endian
, bool);
163 extern void print_function_pointer_address (const struct value_print_options
*options
,
164 struct gdbarch
*gdbarch
,
166 struct ui_file
*stream
);
168 extern int read_string (CORE_ADDR addr
, int len
, int width
,
169 unsigned int fetchlimit
,
170 enum bfd_endian byte_order
,
171 gdb::unique_xmalloc_ptr
<gdb_byte
> *buffer
,
174 /* Helper function to check the validity of some bits of a value.
176 If TYPE represents some aggregate type (e.g., a structure), return 1.
178 Otherwise, any of the bytes starting at OFFSET and extending for
179 TYPE_LENGTH(TYPE) bytes are invalid, print a message to STREAM and
180 return 0. The checking is done using FUNCS.
182 Otherwise, return 1. */
184 extern int valprint_check_validity (struct ui_file
*stream
, struct type
*type
,
185 LONGEST embedded_offset
,
186 const struct value
*val
);
188 extern void val_print_optimized_out (const struct value
*val
,
189 struct ui_file
*stream
);
191 /* Prints "<not saved>" to STREAM. */
192 extern void val_print_not_saved (struct ui_file
*stream
);
194 extern void val_print_unavailable (struct ui_file
*stream
);
196 extern void val_print_invalid_address (struct ui_file
*stream
);
198 /* An instance of this is passed to generic_val_print and describes
199 some language-specific ways to print things. */
201 struct generic_val_print_decorations
203 /* Printing complex numbers: what to print before, between the
204 elements, and after. */
206 const char *complex_prefix
;
207 const char *complex_infix
;
208 const char *complex_suffix
;
210 /* Boolean true and false. */
212 const char *true_name
;
213 const char *false_name
;
215 /* What to print when we see TYPE_CODE_VOID. */
217 const char *void_name
;
219 /* Array start and end strings. */
220 const char *array_start
;
221 const char *array_end
;
225 /* Print a value in a generic way. VAL is the value, STREAM is where
226 to print it, RECURSE is the recursion depth, OPTIONS describe how
227 the printing should be done, and D is the language-specific
228 decorations object. Note that structs and unions cannot be printed
231 extern void generic_value_print (struct value
*val
, struct ui_file
*stream
,
233 const struct value_print_options
*options
,
234 const struct generic_val_print_decorations
*d
);
236 extern void generic_emit_char (int c
, struct type
*type
, struct ui_file
*stream
,
237 int quoter
, const char *encoding
);
239 extern void generic_printstr (struct ui_file
*stream
, struct type
*type
,
240 const gdb_byte
*string
, unsigned int length
,
241 const char *encoding
, int force_ellipses
,
242 int quote_char
, int c_style_terminator
,
243 const struct value_print_options
*options
);
245 /* Run the "output" command. ARGS and FROM_TTY are the usual
246 arguments passed to all command implementations, except ARGS is
249 extern void output_command (const char *args
, int from_tty
);
251 extern int val_print_scalar_type_p (struct type
*type
);
260 /* True if the value should be printed raw -- that is, bypassing
261 python-based formatters. */
265 extern void print_command_parse_format (const char **expp
, const char *cmdname
,
266 value_print_options
*opts
);
268 /* Print VAL to console according to OPTS, including recording it to
270 extern void print_value (value
*val
, const value_print_options
&opts
);
272 /* Completer for the "print", "call", and "compile print"
274 extern void print_command_completer (struct cmd_list_element
*ignore
,
275 completion_tracker
&tracker
,
276 const char *text
, const char *word
);
278 /* Given an address ADDR return all the elements needed to print the
279 address in a symbolic form. NAME can be mangled or not depending
280 on DO_DEMANGLE (and also on the asm_demangle global variable,
281 manipulated via ''set print asm-demangle''). When
282 PREFER_SYM_OVER_MINSYM is true, names (and offsets) from minimal
283 symbols won't be used except in instances where no symbol was
284 found; otherwise, a minsym might be used in some instances (mostly
285 involving function with non-contiguous address ranges). Return
286 0 in case of success, when all the info in the OUT parameters is
287 valid. Return 1 otherwise. */
289 extern int build_address_symbolic (struct gdbarch
*,
292 bool prefer_sym_over_minsym
,
295 std::string
*filename
,
299 /* Check to see if RECURSE is greater than or equal to the allowed
300 printing max-depth (see 'set print max-depth'). If it is then print an
301 ellipsis expression to STREAM and return true, otherwise return false.
302 LANGUAGE determines what type of ellipsis expression is printed. */
304 extern bool val_print_check_max_depth (struct ui_file
*stream
, int recurse
,
305 const struct value_print_options
*opts
,
306 const struct language_defn
*language
);
308 /* Like common_val_print, but call value_check_printable first. */
310 extern void common_val_print_checked
312 struct ui_file
*stream
, int recurse
,
313 const struct value_print_options
*options
,
314 const struct language_defn
*language
);