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8b93c638 | 1 | /* GDB variable objects API. |
618f726f | 2 | Copyright (C) 1999-2016 Free Software Foundation, Inc. |
8b93c638 JM |
3 | |
4 | This program is free software; you can redistribute it and/or modify | |
5 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 6 | the Free Software Foundation; either version 3 of the License, or |
8b93c638 JM |
7 | (at your option) any later version. |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 15 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
8b93c638 JM |
16 | |
17 | #ifndef VAROBJ_H | |
18 | #define VAROBJ_H 1 | |
19 | ||
20 | #include "symtab.h" | |
21 | #include "gdbtypes.h" | |
d56d46f5 | 22 | #include "vec.h" |
8b93c638 JM |
23 | |
24 | /* Enumeration for the format types */ | |
25 | enum varobj_display_formats | |
26 | { | |
27 | FORMAT_NATURAL, /* What gdb actually calls 'natural' */ | |
28 | FORMAT_BINARY, /* Binary display */ | |
29 | FORMAT_DECIMAL, /* Decimal display */ | |
30 | FORMAT_HEXADECIMAL, /* Hex display */ | |
1c35a88f LM |
31 | FORMAT_OCTAL, /* Octal display */ |
32 | FORMAT_ZHEXADECIMAL /* Zero padded hexadecimal */ | |
8b93c638 JM |
33 | }; |
34 | ||
73a93a32 JI |
35 | enum varobj_type |
36 | { | |
581e13c1 MS |
37 | USE_SPECIFIED_FRAME, /* Use the frame passed to varobj_create. */ |
38 | USE_CURRENT_FRAME, /* Use the current frame. */ | |
39 | USE_SELECTED_FRAME /* Always reevaluate in selected frame. */ | |
73a93a32 | 40 | }; |
8756216b | 41 | |
f7f9ae2c VP |
42 | /* Enumerator describing if a variable object is in scope. */ |
43 | enum varobj_scope_status | |
8756216b | 44 | { |
f7f9ae2c | 45 | VAROBJ_IN_SCOPE = 0, /* Varobj is scope, value available. */ |
3e43a32a MS |
46 | VAROBJ_NOT_IN_SCOPE = 1, /* Varobj is not in scope, value not |
47 | available, but varobj can become in | |
48 | scope later. */ | |
f7f9ae2c VP |
49 | VAROBJ_INVALID = 2, /* Varobj no longer has any value, and never |
50 | will. */ | |
8756216b DP |
51 | }; |
52 | ||
581e13c1 | 53 | /* String representations of gdb's format codes (defined in varobj.c). */ |
8b93c638 JM |
54 | extern char *varobj_format_string[]; |
55 | ||
5fa13070 | 56 | /* Struct that describes a variable object instance. */ |
bb5ce47a | 57 | |
8b93c638 JM |
58 | struct varobj; |
59 | ||
d56d46f5 VP |
60 | typedef struct varobj *varobj_p; |
61 | DEF_VEC_P (varobj_p); | |
62 | ||
f7f9ae2c VP |
63 | typedef struct varobj_update_result_t |
64 | { | |
65 | struct varobj *varobj; | |
66 | int type_changed; | |
b6313243 | 67 | int children_changed; |
f7f9ae2c VP |
68 | int changed; |
69 | enum varobj_scope_status status; | |
b6313243 TT |
70 | /* This variable is used internally by varobj_update to indicate if the |
71 | new value of varobj is already computed and installed, or has to | |
581e13c1 | 72 | be yet installed. Don't use this outside varobj.c. */ |
b6313243 | 73 | int value_installed; |
0cc7d26f TT |
74 | |
75 | /* This will be non-NULL when new children were added to the varobj. | |
76 | It lists the new children (which must necessarily come at the end | |
77 | of the child list) added during an update. The caller is | |
78 | responsible for freeing this vector. */ | |
fe978cb0 | 79 | VEC (varobj_p) *newobj; |
f7f9ae2c VP |
80 | } varobj_update_result; |
81 | ||
82 | DEF_VEC_O (varobj_update_result); | |
83 | ||
bb5ce47a YQ |
84 | struct varobj_root; |
85 | struct varobj_dynamic; | |
86 | ||
87 | /* Every variable in the system has a structure of this type defined | |
88 | for it. This structure holds all information necessary to manipulate | |
89 | a particular object variable. Members which must be freed are noted. */ | |
90 | struct varobj | |
91 | { | |
92 | /* Alloc'd name of the variable for this object. If this variable is a | |
93 | child, then this name will be the child's source name. | |
94 | (bar, not foo.bar). */ | |
95 | /* NOTE: This is the "expression". */ | |
96 | char *name; | |
97 | ||
98 | /* Alloc'd expression for this child. Can be used to create a | |
99 | root variable corresponding to this child. */ | |
100 | char *path_expr; | |
101 | ||
102 | /* The alloc'd name for this variable's object. This is here for | |
103 | convenience when constructing this object's children. */ | |
104 | char *obj_name; | |
105 | ||
106 | /* Index of this variable in its parent or -1. */ | |
107 | int index; | |
108 | ||
109 | /* The type of this variable. This can be NULL | |
5fa13070 | 110 | for artificial variable objects -- currently, the "accessibility" |
bb5ce47a YQ |
111 | variable objects in C++. */ |
112 | struct type *type; | |
113 | ||
114 | /* The value of this expression or subexpression. A NULL value | |
115 | indicates there was an error getting this value. | |
116 | Invariant: if varobj_value_is_changeable_p (this) is non-zero, | |
117 | the value is either NULL, or not lazy. */ | |
118 | struct value *value; | |
119 | ||
120 | /* The number of (immediate) children this variable has. */ | |
121 | int num_children; | |
122 | ||
123 | /* If this object is a child, this points to its immediate parent. */ | |
c1cc6152 | 124 | const struct varobj *parent; |
bb5ce47a YQ |
125 | |
126 | /* Children of this object. */ | |
127 | VEC (varobj_p) *children; | |
128 | ||
129 | /* Description of the root variable. Points to root variable for | |
130 | children. */ | |
131 | struct varobj_root *root; | |
132 | ||
133 | /* The format of the output for this object. */ | |
134 | enum varobj_display_formats format; | |
135 | ||
136 | /* Was this variable updated via a varobj_set_value operation. */ | |
137 | int updated; | |
138 | ||
139 | /* Last print value. */ | |
140 | char *print_value; | |
141 | ||
142 | /* Is this variable frozen. Frozen variables are never implicitly | |
143 | updated by -var-update * | |
144 | or -var-update <direct-or-indirect-parent>. */ | |
145 | int frozen; | |
146 | ||
147 | /* Is the value of this variable intentionally not fetched? It is | |
148 | not fetched if either the variable is frozen, or any parents is | |
149 | frozen. */ | |
150 | int not_fetched; | |
151 | ||
152 | /* Sub-range of children which the MI consumer has requested. If | |
153 | FROM < 0 or TO < 0, means that all children have been | |
154 | requested. */ | |
155 | int from; | |
156 | int to; | |
157 | ||
158 | /* Dynamic part of varobj. */ | |
159 | struct varobj_dynamic *dynamic; | |
160 | }; | |
161 | ||
99ad9427 YQ |
162 | /* Is the variable X one of our "fake" children? */ |
163 | #define CPLUS_FAKE_CHILD(x) \ | |
164 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
165 | ||
166 | /* The language specific vector */ | |
167 | ||
168 | struct lang_varobj_ops | |
169 | { | |
170 | /* The number of children of PARENT. */ | |
b09e2c59 | 171 | int (*number_of_children) (const struct varobj *parent); |
99ad9427 | 172 | |
aa3de267 SM |
173 | /* The name (expression) of a root varobj. The returned value must be freed |
174 | by the caller. */ | |
b09e2c59 | 175 | char *(*name_of_variable) (const struct varobj *parent); |
99ad9427 | 176 | |
aa3de267 SM |
177 | /* The name of the INDEX'th child of PARENT. The returned value must be |
178 | freed by the caller. */ | |
c1cc6152 | 179 | char *(*name_of_child) (const struct varobj *parent, int index); |
99ad9427 YQ |
180 | |
181 | /* Returns the rooted expression of CHILD, which is a variable | |
aa3de267 SM |
182 | obtain that has some parent. The returned value must be freed by the |
183 | caller. */ | |
b09e2c59 | 184 | char *(*path_expr_of_child) (const struct varobj *child); |
99ad9427 YQ |
185 | |
186 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ | |
c1cc6152 | 187 | struct value *(*value_of_child) (const struct varobj *parent, int index); |
99ad9427 YQ |
188 | |
189 | /* The type of the INDEX'th child of PARENT. */ | |
c1cc6152 | 190 | struct type *(*type_of_child) (const struct varobj *parent, int index); |
99ad9427 | 191 | |
aa3de267 SM |
192 | /* The current value of VAR. The returned value must be freed by the |
193 | caller. */ | |
b09e2c59 | 194 | char *(*value_of_variable) (const struct varobj *var, |
99ad9427 YQ |
195 | enum varobj_display_formats format); |
196 | ||
197 | /* Return non-zero if changes in value of VAR must be detected and | |
198 | reported by -var-update. Return zero if -var-update should never | |
199 | report changes of such values. This makes sense for structures | |
200 | (since the changes in children values will be reported separately), | |
5fa13070 | 201 | or for artificial objects (like 'public' pseudo-field in C++). |
99ad9427 YQ |
202 | |
203 | Return value of 0 means that gdb need not call value_fetch_lazy | |
204 | for the value of this variable object. */ | |
b09e2c59 | 205 | int (*value_is_changeable_p) (const struct varobj *var); |
99ad9427 YQ |
206 | |
207 | /* Return nonzero if the type of VAR has mutated. | |
208 | ||
209 | VAR's value is still the varobj's previous value, while NEW_VALUE | |
210 | is VAR's new value and NEW_TYPE is the var's new type. NEW_VALUE | |
211 | may be NULL indicating that there is no value available (the varobj | |
212 | may be out of scope, of may be the child of a null pointer, for | |
213 | instance). NEW_TYPE, on the other hand, must never be NULL. | |
214 | ||
215 | This function should also be able to assume that var's number of | |
216 | children is set (not < 0). | |
217 | ||
218 | Languages where types do not mutate can set this to NULL. */ | |
b09e2c59 | 219 | int (*value_has_mutated) (const struct varobj *var, struct value *new_value, |
99ad9427 | 220 | struct type *new_type); |
9a9a7608 AB |
221 | |
222 | /* Return nonzero if VAR is a suitable path expression parent. | |
223 | ||
224 | For C like languages with anonymous structures and unions an anonymous | |
225 | structure or union is not a suitable parent. */ | |
b09e2c59 | 226 | int (*is_path_expr_parent) (const struct varobj *var); |
99ad9427 YQ |
227 | }; |
228 | ||
8838afaf TT |
229 | extern const struct lang_varobj_ops c_varobj_ops; |
230 | extern const struct lang_varobj_ops cplus_varobj_ops; | |
231 | extern const struct lang_varobj_ops java_varobj_ops; | |
232 | extern const struct lang_varobj_ops ada_varobj_ops; | |
99ad9427 | 233 | |
a53b64ea | 234 | #define default_varobj_ops c_varobj_ops |
8b93c638 JM |
235 | /* API functions */ |
236 | ||
237 | extern struct varobj *varobj_create (char *objname, | |
73a93a32 JI |
238 | char *expression, CORE_ADDR frame, |
239 | enum varobj_type type); | |
8b93c638 JM |
240 | |
241 | extern char *varobj_gen_name (void); | |
242 | ||
243 | extern struct varobj *varobj_get_handle (char *name); | |
244 | ||
b09e2c59 | 245 | extern char *varobj_get_objname (const struct varobj *var); |
8b93c638 | 246 | |
b09e2c59 | 247 | extern char *varobj_get_expression (const struct varobj *var); |
8b93c638 | 248 | |
30914ca8 SM |
249 | /* Delete a varobj and all its children if only_children == 0, otherwise delete |
250 | only the children. Return the number of deleted variables. */ | |
251 | ||
252 | extern int varobj_delete (struct varobj *var, int only_children); | |
8b93c638 JM |
253 | |
254 | extern enum varobj_display_formats varobj_set_display_format ( | |
255 | struct varobj *var, | |
256 | enum varobj_display_formats format); | |
257 | ||
258 | extern enum varobj_display_formats varobj_get_display_format ( | |
b09e2c59 | 259 | const struct varobj *var); |
8b93c638 | 260 | |
b09e2c59 | 261 | extern int varobj_get_thread_id (const struct varobj *var); |
c5b48eac | 262 | |
25d5ea92 VP |
263 | extern void varobj_set_frozen (struct varobj *var, int frozen); |
264 | ||
b09e2c59 | 265 | extern int varobj_get_frozen (const struct varobj *var); |
25d5ea92 | 266 | |
b09e2c59 SM |
267 | extern void varobj_get_child_range (const struct varobj *var, int *from, |
268 | int *to); | |
0cc7d26f TT |
269 | |
270 | extern void varobj_set_child_range (struct varobj *var, int from, int to); | |
271 | ||
b09e2c59 | 272 | extern char *varobj_get_display_hint (const struct varobj *var); |
b6313243 | 273 | |
8b93c638 JM |
274 | extern int varobj_get_num_children (struct varobj *var); |
275 | ||
0cc7d26f TT |
276 | /* Return the list of children of VAR. The returned vector should not |
277 | be modified in any way. FROM and TO are in/out parameters | |
278 | indicating the range of children to return. If either *FROM or *TO | |
279 | is less than zero on entry, then all children will be returned. On | |
280 | return, *FROM and *TO will be updated to indicate the real range | |
281 | that was returned. The resulting VEC will contain at least the | |
282 | children from *FROM to just before *TO; it might contain more | |
283 | children, depending on whether any more were available. */ | |
284 | extern VEC (varobj_p)* varobj_list_children (struct varobj *var, | |
285 | int *from, int *to); | |
8b93c638 JM |
286 | |
287 | extern char *varobj_get_type (struct varobj *var); | |
288 | ||
b09e2c59 | 289 | extern struct type *varobj_get_gdb_type (const struct varobj *var); |
1ecb4ee0 | 290 | |
c1cc6152 | 291 | extern char *varobj_get_path_expr (const struct varobj *var); |
02142340 | 292 | |
b09e2c59 SM |
293 | extern const struct language_defn * |
294 | varobj_get_language (const struct varobj *var); | |
8b93c638 | 295 | |
b09e2c59 | 296 | extern int varobj_get_attributes (const struct varobj *var); |
8b93c638 | 297 | |
de051565 MK |
298 | extern char *varobj_get_formatted_value (struct varobj *var, |
299 | enum varobj_display_formats format); | |
300 | ||
8b93c638 JM |
301 | extern char *varobj_get_value (struct varobj *var); |
302 | ||
303 | extern int varobj_set_value (struct varobj *var, char *expression); | |
304 | ||
54333c3b JK |
305 | extern void all_root_varobjs (void (*func) (struct varobj *var, void *data), |
306 | void *data); | |
8b93c638 | 307 | |
f7f9ae2c | 308 | extern VEC(varobj_update_result) *varobj_update (struct varobj **varp, |
fe978cb0 | 309 | int is_explicit); |
8b93c638 | 310 | |
8756216b DP |
311 | extern void varobj_invalidate (void); |
312 | ||
b09e2c59 | 313 | extern int varobj_editable_p (const struct varobj *var); |
c203027e | 314 | |
b09e2c59 | 315 | extern int varobj_floating_p (const struct varobj *var); |
5a413362 | 316 | |
2021ad3a PM |
317 | extern void varobj_set_visualizer (struct varobj *var, |
318 | const char *visualizer); | |
0cc7d26f TT |
319 | |
320 | extern void varobj_enable_pretty_printing (void); | |
321 | ||
b09e2c59 | 322 | extern int varobj_has_more (const struct varobj *var, int to); |
0cc7d26f | 323 | |
b09e2c59 | 324 | extern int varobj_is_dynamic_p (const struct varobj *var); |
b6313243 | 325 | |
b09e2c59 | 326 | extern struct cleanup *varobj_ensure_python_env (const struct varobj *var); |
e5250216 | 327 | |
b09e2c59 SM |
328 | extern int varobj_default_value_is_changeable_p (const struct varobj *var); |
329 | extern int varobj_value_is_changeable_p (const struct varobj *var); | |
99ad9427 | 330 | |
b09e2c59 | 331 | extern struct type *varobj_get_value_type (const struct varobj *var); |
99ad9427 | 332 | |
b09e2c59 | 333 | extern int varobj_is_anonymous_child (const struct varobj *child); |
99ad9427 | 334 | |
c1cc6152 SM |
335 | extern const struct varobj * |
336 | varobj_get_path_expr_parent (const struct varobj *var); | |
99ad9427 YQ |
337 | |
338 | extern char *varobj_value_get_print_value (struct value *value, | |
339 | enum varobj_display_formats format, | |
b09e2c59 | 340 | const struct varobj *var); |
99ad9427 YQ |
341 | |
342 | extern void varobj_formatted_print_options (struct value_print_options *opts, | |
343 | enum varobj_display_formats format); | |
344 | ||
345 | extern void varobj_restrict_range (VEC (varobj_p) *children, int *from, | |
346 | int *to); | |
9a9a7608 | 347 | |
b09e2c59 | 348 | extern int varobj_default_is_path_expr_parent (const struct varobj *var); |
9a9a7608 | 349 | |
8b93c638 | 350 | #endif /* VAROBJ_H */ |