1 /* Implementation of the GDB variable objects API.
3 Copyright (C) 1999-2013 Free Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 #include "exceptions.h"
21 #include "expression.h"
28 #include "gdb_assert.h"
29 #include "gdb_string.h"
30 #include "gdb_regex.h"
34 #include "gdbthread.h"
36 #include "ada-varobj.h"
40 #include "python/python.h"
41 #include "python/python-internal.h"
46 /* The names of varobjs representing anonymous structs or unions. */
47 #define ANONYMOUS_STRUCT_NAME _("<anonymous struct>")
48 #define ANONYMOUS_UNION_NAME _("<anonymous union>")
50 /* Non-zero if we want to see trace of varobj level stuff. */
52 unsigned int varobjdebug
= 0;
54 show_varobjdebug (struct ui_file
*file
, int from_tty
,
55 struct cmd_list_element
*c
, const char *value
)
57 fprintf_filtered (file
, _("Varobj debugging is %s.\n"), value
);
60 /* String representations of gdb's format codes. */
61 char *varobj_format_string
[] =
62 { "natural", "binary", "decimal", "hexadecimal", "octal" };
64 /* String representations of gdb's known languages. */
65 char *varobj_language_string
[] = { "unknown", "C", "C++", "Java" };
67 /* True if we want to allow Python-based pretty-printing. */
68 static int pretty_printing
= 0;
71 varobj_enable_pretty_printing (void)
78 /* Every root variable has one of these structures saved in its
79 varobj. Members which must be free'd are noted. */
83 /* Alloc'd expression for this parent. */
84 struct expression
*exp
;
86 /* Block for which this expression is valid. */
87 const struct block
*valid_block
;
89 /* The frame for this expression. This field is set iff valid_block is
91 struct frame_id frame
;
93 /* The thread ID that this varobj_root belong to. This field
94 is only valid if valid_block is not NULL.
95 When not 0, indicates which thread 'frame' belongs to.
96 When 0, indicates that the thread list was empty when the varobj_root
100 /* If 1, the -var-update always recomputes the value in the
101 current thread and frame. Otherwise, variable object is
102 always updated in the specific scope/thread/frame. */
105 /* Flag that indicates validity: set to 0 when this varobj_root refers
106 to symbols that do not exist anymore. */
109 /* Language info for this variable and its children. */
110 struct language_specific
*lang
;
112 /* The varobj for this root node. */
113 struct varobj
*rootvar
;
115 /* Next root variable */
116 struct varobj_root
*next
;
119 /* Every variable in the system has a structure of this type defined
120 for it. This structure holds all information necessary to manipulate
121 a particular object variable. Members which must be freed are noted. */
125 /* Alloc'd name of the variable for this object. If this variable is a
126 child, then this name will be the child's source name.
127 (bar, not foo.bar). */
128 /* NOTE: This is the "expression". */
131 /* Alloc'd expression for this child. Can be used to create a
132 root variable corresponding to this child. */
135 /* The alloc'd name for this variable's object. This is here for
136 convenience when constructing this object's children. */
139 /* Index of this variable in its parent or -1. */
142 /* The type of this variable. This can be NULL
143 for artifial variable objects -- currently, the "accessibility"
144 variable objects in C++. */
147 /* The value of this expression or subexpression. A NULL value
148 indicates there was an error getting this value.
149 Invariant: if varobj_value_is_changeable_p (this) is non-zero,
150 the value is either NULL, or not lazy. */
153 /* The number of (immediate) children this variable has. */
156 /* If this object is a child, this points to its immediate parent. */
157 struct varobj
*parent
;
159 /* Children of this object. */
160 VEC (varobj_p
) *children
;
162 /* Whether the children of this varobj were requested. This field is
163 used to decide if dynamic varobj should recompute their children.
164 In the event that the frontend never asked for the children, we
166 int children_requested
;
168 /* Description of the root variable. Points to root variable for
170 struct varobj_root
*root
;
172 /* The format of the output for this object. */
173 enum varobj_display_formats format
;
175 /* Was this variable updated via a varobj_set_value operation. */
178 /* Last print value. */
181 /* Is this variable frozen. Frozen variables are never implicitly
182 updated by -var-update *
183 or -var-update <direct-or-indirect-parent>. */
186 /* Is the value of this variable intentionally not fetched? It is
187 not fetched if either the variable is frozen, or any parents is
191 /* Sub-range of children which the MI consumer has requested. If
192 FROM < 0 or TO < 0, means that all children have been
197 /* The pretty-printer constructor. If NULL, then the default
198 pretty-printer will be looked up. If None, then no
199 pretty-printer will be installed. */
200 PyObject
*constructor
;
202 /* The pretty-printer that has been constructed. If NULL, then a
203 new printer object is needed, and one will be constructed. */
204 PyObject
*pretty_printer
;
206 /* The iterator returned by the printer's 'children' method, or NULL
208 PyObject
*child_iter
;
210 /* We request one extra item from the iterator, so that we can
211 report to the caller whether there are more items than we have
212 already reported. However, we don't want to install this value
213 when we read it, because that will mess up future updates. So,
214 we stash it here instead. */
215 PyObject
*saved_item
;
221 struct cpstack
*next
;
224 /* A list of varobjs */
232 /* Private function prototypes */
234 /* Helper functions for the above subcommands. */
236 static int delete_variable (struct cpstack
**, struct varobj
*, int);
238 static void delete_variable_1 (struct cpstack
**, int *,
239 struct varobj
*, int, int);
241 static int install_variable (struct varobj
*);
243 static void uninstall_variable (struct varobj
*);
245 static struct varobj
*create_child (struct varobj
*, int, char *);
247 static struct varobj
*
248 create_child_with_value (struct varobj
*parent
, int index
, const char *name
,
249 struct value
*value
);
251 /* Utility routines */
253 static struct varobj
*new_variable (void);
255 static struct varobj
*new_root_variable (void);
257 static void free_variable (struct varobj
*var
);
259 static struct cleanup
*make_cleanup_free_variable (struct varobj
*var
);
261 static struct type
*get_type (struct varobj
*var
);
263 static struct type
*get_value_type (struct varobj
*var
);
265 static struct type
*get_target_type (struct type
*);
267 static enum varobj_display_formats
variable_default_display (struct varobj
*);
269 static void cppush (struct cpstack
**pstack
, char *name
);
271 static char *cppop (struct cpstack
**pstack
);
273 static int update_type_if_necessary (struct varobj
*var
,
274 struct value
*new_value
);
276 static int install_new_value (struct varobj
*var
, struct value
*value
,
279 /* Language-specific routines. */
281 static enum varobj_languages
variable_language (struct varobj
*var
);
283 static int number_of_children (struct varobj
*);
285 static char *name_of_variable (struct varobj
*);
287 static char *name_of_child (struct varobj
*, int);
289 static struct value
*value_of_root (struct varobj
**var_handle
, int *);
291 static struct value
*value_of_child (struct varobj
*parent
, int index
);
293 static char *my_value_of_variable (struct varobj
*var
,
294 enum varobj_display_formats format
);
296 static char *value_get_print_value (struct value
*value
,
297 enum varobj_display_formats format
,
300 static int varobj_value_is_changeable_p (struct varobj
*var
);
302 static int is_root_p (struct varobj
*var
);
306 static struct varobj
*varobj_add_child (struct varobj
*var
,
308 struct value
*value
);
310 #endif /* HAVE_PYTHON */
312 static int default_value_is_changeable_p (struct varobj
*var
);
314 /* C implementation */
316 static int c_number_of_children (struct varobj
*var
);
318 static char *c_name_of_variable (struct varobj
*parent
);
320 static char *c_name_of_child (struct varobj
*parent
, int index
);
322 static char *c_path_expr_of_child (struct varobj
*child
);
324 static struct value
*c_value_of_root (struct varobj
**var_handle
);
326 static struct value
*c_value_of_child (struct varobj
*parent
, int index
);
328 static struct type
*c_type_of_child (struct varobj
*parent
, int index
);
330 static char *c_value_of_variable (struct varobj
*var
,
331 enum varobj_display_formats format
);
333 /* C++ implementation */
335 static int cplus_number_of_children (struct varobj
*var
);
337 static void cplus_class_num_children (struct type
*type
, int children
[3]);
339 static char *cplus_name_of_variable (struct varobj
*parent
);
341 static char *cplus_name_of_child (struct varobj
*parent
, int index
);
343 static char *cplus_path_expr_of_child (struct varobj
*child
);
345 static struct value
*cplus_value_of_root (struct varobj
**var_handle
);
347 static struct value
*cplus_value_of_child (struct varobj
*parent
, int index
);
349 static struct type
*cplus_type_of_child (struct varobj
*parent
, int index
);
351 static char *cplus_value_of_variable (struct varobj
*var
,
352 enum varobj_display_formats format
);
354 /* Java implementation */
356 static int java_number_of_children (struct varobj
*var
);
358 static char *java_name_of_variable (struct varobj
*parent
);
360 static char *java_name_of_child (struct varobj
*parent
, int index
);
362 static char *java_path_expr_of_child (struct varobj
*child
);
364 static struct value
*java_value_of_root (struct varobj
**var_handle
);
366 static struct value
*java_value_of_child (struct varobj
*parent
, int index
);
368 static struct type
*java_type_of_child (struct varobj
*parent
, int index
);
370 static char *java_value_of_variable (struct varobj
*var
,
371 enum varobj_display_formats format
);
373 /* Ada implementation */
375 static int ada_number_of_children (struct varobj
*var
);
377 static char *ada_name_of_variable (struct varobj
*parent
);
379 static char *ada_name_of_child (struct varobj
*parent
, int index
);
381 static char *ada_path_expr_of_child (struct varobj
*child
);
383 static struct value
*ada_value_of_root (struct varobj
**var_handle
);
385 static struct value
*ada_value_of_child (struct varobj
*parent
, int index
);
387 static struct type
*ada_type_of_child (struct varobj
*parent
, int index
);
389 static char *ada_value_of_variable (struct varobj
*var
,
390 enum varobj_display_formats format
);
392 static int ada_value_is_changeable_p (struct varobj
*var
);
394 static int ada_value_has_mutated (struct varobj
*var
, struct value
*new_val
,
395 struct type
*new_type
);
397 /* The language specific vector */
399 struct language_specific
401 /* The number of children of PARENT. */
402 int (*number_of_children
) (struct varobj
* parent
);
404 /* The name (expression) of a root varobj. */
405 char *(*name_of_variable
) (struct varobj
* parent
);
407 /* The name of the INDEX'th child of PARENT. */
408 char *(*name_of_child
) (struct varobj
* parent
, int index
);
410 /* Returns the rooted expression of CHILD, which is a variable
411 obtain that has some parent. */
412 char *(*path_expr_of_child
) (struct varobj
* child
);
414 /* The ``struct value *'' of the root variable ROOT. */
415 struct value
*(*value_of_root
) (struct varobj
** root_handle
);
417 /* The ``struct value *'' of the INDEX'th child of PARENT. */
418 struct value
*(*value_of_child
) (struct varobj
* parent
, int index
);
420 /* The type of the INDEX'th child of PARENT. */
421 struct type
*(*type_of_child
) (struct varobj
* parent
, int index
);
423 /* The current value of VAR. */
424 char *(*value_of_variable
) (struct varobj
* var
,
425 enum varobj_display_formats format
);
427 /* Return non-zero if changes in value of VAR must be detected and
428 reported by -var-update. Return zero if -var-update should never
429 report changes of such values. This makes sense for structures
430 (since the changes in children values will be reported separately),
431 or for artifical objects (like 'public' pseudo-field in C++).
433 Return value of 0 means that gdb need not call value_fetch_lazy
434 for the value of this variable object. */
435 int (*value_is_changeable_p
) (struct varobj
*var
);
437 /* Return nonzero if the type of VAR has mutated.
439 VAR's value is still the varobj's previous value, while NEW_VALUE
440 is VAR's new value and NEW_TYPE is the var's new type. NEW_VALUE
441 may be NULL indicating that there is no value available (the varobj
442 may be out of scope, of may be the child of a null pointer, for
443 instance). NEW_TYPE, on the other hand, must never be NULL.
445 This function should also be able to assume that var's number of
446 children is set (not < 0).
448 Languages where types do not mutate can set this to NULL. */
449 int (*value_has_mutated
) (struct varobj
*var
, struct value
*new_value
,
450 struct type
*new_type
);
453 /* Array of known source language routines. */
454 static struct language_specific languages
[vlang_end
] = {
455 /* Unknown (try treating as C). */
457 c_number_of_children
,
460 c_path_expr_of_child
,
465 default_value_is_changeable_p
,
466 NULL
/* value_has_mutated */}
470 c_number_of_children
,
473 c_path_expr_of_child
,
478 default_value_is_changeable_p
,
479 NULL
/* value_has_mutated */}
483 cplus_number_of_children
,
484 cplus_name_of_variable
,
486 cplus_path_expr_of_child
,
488 cplus_value_of_child
,
490 cplus_value_of_variable
,
491 default_value_is_changeable_p
,
492 NULL
/* value_has_mutated */}
496 java_number_of_children
,
497 java_name_of_variable
,
499 java_path_expr_of_child
,
503 java_value_of_variable
,
504 default_value_is_changeable_p
,
505 NULL
/* value_has_mutated */},
508 ada_number_of_children
,
509 ada_name_of_variable
,
511 ada_path_expr_of_child
,
515 ada_value_of_variable
,
516 ada_value_is_changeable_p
,
517 ada_value_has_mutated
}
520 /* A little convenience enum for dealing with C++/Java. */
523 v_public
= 0, v_private
, v_protected
528 /* Mappings of varobj_display_formats enums to gdb's format codes. */
529 static int format_code
[] = { 0, 't', 'd', 'x', 'o' };
531 /* Header of the list of root variable objects. */
532 static struct varobj_root
*rootlist
;
534 /* Prime number indicating the number of buckets in the hash table. */
535 /* A prime large enough to avoid too many colisions. */
536 #define VAROBJ_TABLE_SIZE 227
538 /* Pointer to the varobj hash table (built at run time). */
539 static struct vlist
**varobj_table
;
541 /* Is the variable X one of our "fake" children? */
542 #define CPLUS_FAKE_CHILD(x) \
543 ((x) != NULL && (x)->type == NULL && (x)->value == NULL)
546 /* API Implementation */
548 is_root_p (struct varobj
*var
)
550 return (var
->root
->rootvar
== var
);
554 /* Helper function to install a Python environment suitable for
555 use during operations on VAR. */
556 static struct cleanup
*
557 varobj_ensure_python_env (struct varobj
*var
)
559 return ensure_python_env (var
->root
->exp
->gdbarch
,
560 var
->root
->exp
->language_defn
);
564 /* Creates a varobj (not its children). */
566 /* Return the full FRAME which corresponds to the given CORE_ADDR
567 or NULL if no FRAME on the chain corresponds to CORE_ADDR. */
569 static struct frame_info
*
570 find_frame_addr_in_frame_chain (CORE_ADDR frame_addr
)
572 struct frame_info
*frame
= NULL
;
574 if (frame_addr
== (CORE_ADDR
) 0)
577 for (frame
= get_current_frame ();
579 frame
= get_prev_frame (frame
))
581 /* The CORE_ADDR we get as argument was parsed from a string GDB
582 output as $fp. This output got truncated to gdbarch_addr_bit.
583 Truncate the frame base address in the same manner before
584 comparing it against our argument. */
585 CORE_ADDR frame_base
= get_frame_base_address (frame
);
586 int addr_bit
= gdbarch_addr_bit (get_frame_arch (frame
));
588 if (addr_bit
< (sizeof (CORE_ADDR
) * HOST_CHAR_BIT
))
589 frame_base
&= ((CORE_ADDR
) 1 << addr_bit
) - 1;
591 if (frame_base
== frame_addr
)
599 varobj_create (char *objname
,
600 char *expression
, CORE_ADDR frame
, enum varobj_type type
)
603 struct cleanup
*old_chain
;
605 /* Fill out a varobj structure for the (root) variable being constructed. */
606 var
= new_root_variable ();
607 old_chain
= make_cleanup_free_variable (var
);
609 if (expression
!= NULL
)
611 struct frame_info
*fi
;
612 struct frame_id old_id
= null_frame_id
;
615 enum varobj_languages lang
;
616 struct value
*value
= NULL
;
617 volatile struct gdb_exception except
;
620 /* Parse and evaluate the expression, filling in as much of the
621 variable's data as possible. */
623 if (has_stack_frames ())
625 /* Allow creator to specify context of variable. */
626 if ((type
== USE_CURRENT_FRAME
) || (type
== USE_SELECTED_FRAME
))
627 fi
= get_selected_frame (NULL
);
629 /* FIXME: cagney/2002-11-23: This code should be doing a
630 lookup using the frame ID and not just the frame's
631 ``address''. This, of course, means an interface
632 change. However, with out that interface change ISAs,
633 such as the ia64 with its two stacks, won't work.
634 Similar goes for the case where there is a frameless
636 fi
= find_frame_addr_in_frame_chain (frame
);
641 /* frame = -2 means always use selected frame. */
642 if (type
== USE_SELECTED_FRAME
)
643 var
->root
->floating
= 1;
649 block
= get_frame_block (fi
, 0);
650 pc
= get_frame_pc (fi
);
654 innermost_block
= NULL
;
655 /* Wrap the call to parse expression, so we can
656 return a sensible error. */
657 TRY_CATCH (except
, RETURN_MASK_ERROR
)
659 var
->root
->exp
= parse_exp_1 (&p
, pc
, block
, 0);
662 if (except
.reason
< 0)
664 do_cleanups (old_chain
);
668 /* Don't allow variables to be created for types. */
669 if (var
->root
->exp
->elts
[0].opcode
== OP_TYPE
670 || var
->root
->exp
->elts
[0].opcode
== OP_TYPEOF
671 || var
->root
->exp
->elts
[0].opcode
== OP_DECLTYPE
)
673 do_cleanups (old_chain
);
674 fprintf_unfiltered (gdb_stderr
, "Attempt to use a type name"
675 " as an expression.\n");
679 var
->format
= variable_default_display (var
);
680 var
->root
->valid_block
= innermost_block
;
681 var
->name
= xstrdup (expression
);
682 /* For a root var, the name and the expr are the same. */
683 var
->path_expr
= xstrdup (expression
);
685 /* When the frame is different from the current frame,
686 we must select the appropriate frame before parsing
687 the expression, otherwise the value will not be current.
688 Since select_frame is so benign, just call it for all cases. */
691 /* User could specify explicit FRAME-ADDR which was not found but
692 EXPRESSION is frame specific and we would not be able to evaluate
693 it correctly next time. With VALID_BLOCK set we must also set
694 FRAME and THREAD_ID. */
696 error (_("Failed to find the specified frame"));
698 var
->root
->frame
= get_frame_id (fi
);
699 var
->root
->thread_id
= pid_to_thread_id (inferior_ptid
);
700 old_id
= get_frame_id (get_selected_frame (NULL
));
704 /* We definitely need to catch errors here.
705 If evaluate_expression succeeds we got the value we wanted.
706 But if it fails, we still go on with a call to evaluate_type(). */
707 TRY_CATCH (except
, RETURN_MASK_ERROR
)
709 value
= evaluate_expression (var
->root
->exp
);
712 if (except
.reason
< 0)
714 /* Error getting the value. Try to at least get the
716 struct value
*type_only_value
= evaluate_type (var
->root
->exp
);
718 var
->type
= value_type (type_only_value
);
722 int real_type_found
= 0;
724 var
->type
= value_actual_type (value
, 0, &real_type_found
);
726 value
= value_cast (var
->type
, value
);
729 /* Set language info */
730 lang
= variable_language (var
);
731 var
->root
->lang
= &languages
[lang
];
733 install_new_value (var
, value
, 1 /* Initial assignment */);
735 /* Set ourselves as our root. */
736 var
->root
->rootvar
= var
;
738 /* Reset the selected frame. */
739 if (frame_id_p (old_id
))
740 select_frame (frame_find_by_id (old_id
));
743 /* If the variable object name is null, that means this
744 is a temporary variable, so don't install it. */
746 if ((var
!= NULL
) && (objname
!= NULL
))
748 var
->obj_name
= xstrdup (objname
);
750 /* If a varobj name is duplicated, the install will fail so
752 if (!install_variable (var
))
754 do_cleanups (old_chain
);
759 discard_cleanups (old_chain
);
763 /* Generates an unique name that can be used for a varobj. */
766 varobj_gen_name (void)
771 /* Generate a name for this object. */
773 obj_name
= xstrprintf ("var%d", id
);
778 /* Given an OBJNAME, returns the pointer to the corresponding varobj. Call
779 error if OBJNAME cannot be found. */
782 varobj_get_handle (char *objname
)
786 unsigned int index
= 0;
789 for (chp
= objname
; *chp
; chp
++)
791 index
= (index
+ (i
++ * (unsigned int) *chp
)) % VAROBJ_TABLE_SIZE
;
794 cv
= *(varobj_table
+ index
);
795 while ((cv
!= NULL
) && (strcmp (cv
->var
->obj_name
, objname
) != 0))
799 error (_("Variable object not found"));
804 /* Given the handle, return the name of the object. */
807 varobj_get_objname (struct varobj
*var
)
809 return var
->obj_name
;
812 /* Given the handle, return the expression represented by the object. */
815 varobj_get_expression (struct varobj
*var
)
817 return name_of_variable (var
);
820 /* Deletes a varobj and all its children if only_children == 0,
821 otherwise deletes only the children; returns a malloc'ed list of
822 all the (malloc'ed) names of the variables that have been deleted
823 (NULL terminated). */
826 varobj_delete (struct varobj
*var
, char ***dellist
, int only_children
)
830 struct cpstack
*result
= NULL
;
833 /* Initialize a stack for temporary results. */
834 cppush (&result
, NULL
);
837 /* Delete only the variable children. */
838 delcount
= delete_variable (&result
, var
, 1 /* only the children */ );
840 /* Delete the variable and all its children. */
841 delcount
= delete_variable (&result
, var
, 0 /* parent+children */ );
843 /* We may have been asked to return a list of what has been deleted. */
846 *dellist
= xmalloc ((delcount
+ 1) * sizeof (char *));
850 *cp
= cppop (&result
);
851 while ((*cp
!= NULL
) && (mycount
> 0))
855 *cp
= cppop (&result
);
858 if (mycount
|| (*cp
!= NULL
))
859 warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"),
868 /* Convenience function for varobj_set_visualizer. Instantiate a
869 pretty-printer for a given value. */
871 instantiate_pretty_printer (PyObject
*constructor
, struct value
*value
)
873 PyObject
*val_obj
= NULL
;
876 val_obj
= value_to_value_object (value
);
880 printer
= PyObject_CallFunctionObjArgs (constructor
, val_obj
, NULL
);
887 /* Set/Get variable object display format. */
889 enum varobj_display_formats
890 varobj_set_display_format (struct varobj
*var
,
891 enum varobj_display_formats format
)
898 case FORMAT_HEXADECIMAL
:
900 var
->format
= format
;
904 var
->format
= variable_default_display (var
);
907 if (varobj_value_is_changeable_p (var
)
908 && var
->value
&& !value_lazy (var
->value
))
910 xfree (var
->print_value
);
911 var
->print_value
= value_get_print_value (var
->value
, var
->format
, var
);
917 enum varobj_display_formats
918 varobj_get_display_format (struct varobj
*var
)
924 varobj_get_display_hint (struct varobj
*var
)
929 struct cleanup
*back_to
;
931 if (!gdb_python_initialized
)
934 back_to
= varobj_ensure_python_env (var
);
936 if (var
->pretty_printer
)
937 result
= gdbpy_get_display_hint (var
->pretty_printer
);
939 do_cleanups (back_to
);
945 /* Return true if the varobj has items after TO, false otherwise. */
948 varobj_has_more (struct varobj
*var
, int to
)
950 if (VEC_length (varobj_p
, var
->children
) > to
)
952 return ((to
== -1 || VEC_length (varobj_p
, var
->children
) == to
)
953 && var
->saved_item
!= NULL
);
956 /* If the variable object is bound to a specific thread, that
957 is its evaluation can always be done in context of a frame
958 inside that thread, returns GDB id of the thread -- which
959 is always positive. Otherwise, returns -1. */
961 varobj_get_thread_id (struct varobj
*var
)
963 if (var
->root
->valid_block
&& var
->root
->thread_id
> 0)
964 return var
->root
->thread_id
;
970 varobj_set_frozen (struct varobj
*var
, int frozen
)
972 /* When a variable is unfrozen, we don't fetch its value.
973 The 'not_fetched' flag remains set, so next -var-update
976 We don't fetch the value, because for structures the client
977 should do -var-update anyway. It would be bad to have different
978 client-size logic for structure and other types. */
979 var
->frozen
= frozen
;
983 varobj_get_frozen (struct varobj
*var
)
988 /* A helper function that restricts a range to what is actually
989 available in a VEC. This follows the usual rules for the meaning
990 of FROM and TO -- if either is negative, the entire range is
994 restrict_range (VEC (varobj_p
) *children
, int *from
, int *to
)
996 if (*from
< 0 || *to
< 0)
999 *to
= VEC_length (varobj_p
, children
);
1003 if (*from
> VEC_length (varobj_p
, children
))
1004 *from
= VEC_length (varobj_p
, children
);
1005 if (*to
> VEC_length (varobj_p
, children
))
1006 *to
= VEC_length (varobj_p
, children
);
1014 /* A helper for update_dynamic_varobj_children that installs a new
1015 child when needed. */
1018 install_dynamic_child (struct varobj
*var
,
1019 VEC (varobj_p
) **changed
,
1020 VEC (varobj_p
) **type_changed
,
1021 VEC (varobj_p
) **new,
1022 VEC (varobj_p
) **unchanged
,
1026 struct value
*value
)
1028 if (VEC_length (varobj_p
, var
->children
) < index
+ 1)
1030 /* There's no child yet. */
1031 struct varobj
*child
= varobj_add_child (var
, name
, value
);
1035 VEC_safe_push (varobj_p
, *new, child
);
1041 varobj_p existing
= VEC_index (varobj_p
, var
->children
, index
);
1042 int type_updated
= update_type_if_necessary (existing
, value
);
1047 VEC_safe_push (varobj_p
, *type_changed
, existing
);
1049 if (install_new_value (existing
, value
, 0))
1051 if (!type_updated
&& changed
)
1052 VEC_safe_push (varobj_p
, *changed
, existing
);
1054 else if (!type_updated
&& unchanged
)
1055 VEC_safe_push (varobj_p
, *unchanged
, existing
);
1060 dynamic_varobj_has_child_method (struct varobj
*var
)
1062 struct cleanup
*back_to
;
1063 PyObject
*printer
= var
->pretty_printer
;
1066 if (!gdb_python_initialized
)
1069 back_to
= varobj_ensure_python_env (var
);
1070 result
= PyObject_HasAttr (printer
, gdbpy_children_cst
);
1071 do_cleanups (back_to
);
1078 update_dynamic_varobj_children (struct varobj
*var
,
1079 VEC (varobj_p
) **changed
,
1080 VEC (varobj_p
) **type_changed
,
1081 VEC (varobj_p
) **new,
1082 VEC (varobj_p
) **unchanged
,
1084 int update_children
,
1089 struct cleanup
*back_to
;
1092 PyObject
*printer
= var
->pretty_printer
;
1094 if (!gdb_python_initialized
)
1097 back_to
= varobj_ensure_python_env (var
);
1100 if (!PyObject_HasAttr (printer
, gdbpy_children_cst
))
1102 do_cleanups (back_to
);
1106 if (update_children
|| !var
->child_iter
)
1108 children
= PyObject_CallMethodObjArgs (printer
, gdbpy_children_cst
,
1113 gdbpy_print_stack ();
1114 error (_("Null value returned for children"));
1117 make_cleanup_py_decref (children
);
1119 Py_XDECREF (var
->child_iter
);
1120 var
->child_iter
= PyObject_GetIter (children
);
1121 if (!var
->child_iter
)
1123 gdbpy_print_stack ();
1124 error (_("Could not get children iterator"));
1127 Py_XDECREF (var
->saved_item
);
1128 var
->saved_item
= NULL
;
1133 i
= VEC_length (varobj_p
, var
->children
);
1135 /* We ask for one extra child, so that MI can report whether there
1136 are more children. */
1137 for (; to
< 0 || i
< to
+ 1; ++i
)
1142 /* See if there was a leftover from last time. */
1143 if (var
->saved_item
)
1145 item
= var
->saved_item
;
1146 var
->saved_item
= NULL
;
1149 item
= PyIter_Next (var
->child_iter
);
1153 /* Normal end of iteration. */
1154 if (!PyErr_Occurred ())
1157 /* If we got a memory error, just use the text as the
1159 if (PyErr_ExceptionMatches (gdbpy_gdb_memory_error
))
1161 PyObject
*type
, *value
, *trace
;
1162 char *name_str
, *value_str
;
1164 PyErr_Fetch (&type
, &value
, &trace
);
1165 value_str
= gdbpy_exception_to_string (type
, value
);
1171 gdbpy_print_stack ();
1175 name_str
= xstrprintf ("<error at %d>", i
);
1176 item
= Py_BuildValue ("(ss)", name_str
, value_str
);
1181 gdbpy_print_stack ();
1189 /* Any other kind of error. */
1190 gdbpy_print_stack ();
1195 /* We don't want to push the extra child on any report list. */
1196 if (to
< 0 || i
< to
)
1201 struct cleanup
*inner
;
1202 int can_mention
= from
< 0 || i
>= from
;
1204 inner
= make_cleanup_py_decref (item
);
1206 if (!PyArg_ParseTuple (item
, "sO", &name
, &py_v
))
1208 gdbpy_print_stack ();
1209 error (_("Invalid item from the child list"));
1212 v
= convert_value_from_python (py_v
);
1214 gdbpy_print_stack ();
1215 install_dynamic_child (var
, can_mention
? changed
: NULL
,
1216 can_mention
? type_changed
: NULL
,
1217 can_mention
? new : NULL
,
1218 can_mention
? unchanged
: NULL
,
1219 can_mention
? cchanged
: NULL
, i
, name
, v
);
1220 do_cleanups (inner
);
1224 Py_XDECREF (var
->saved_item
);
1225 var
->saved_item
= item
;
1227 /* We want to truncate the child list just before this
1236 if (i
< VEC_length (varobj_p
, var
->children
))
1241 for (j
= i
; j
< VEC_length (varobj_p
, var
->children
); ++j
)
1242 varobj_delete (VEC_index (varobj_p
, var
->children
, j
), NULL
, 0);
1243 VEC_truncate (varobj_p
, var
->children
, i
);
1246 /* If there are fewer children than requested, note that the list of
1247 children changed. */
1248 if (to
>= 0 && VEC_length (varobj_p
, var
->children
) < to
)
1251 var
->num_children
= VEC_length (varobj_p
, var
->children
);
1253 do_cleanups (back_to
);
1257 gdb_assert_not_reached ("should never be called if Python is not enabled");
1262 varobj_get_num_children (struct varobj
*var
)
1264 if (var
->num_children
== -1)
1266 if (var
->pretty_printer
)
1270 /* If we have a dynamic varobj, don't report -1 children.
1271 So, try to fetch some children first. */
1272 update_dynamic_varobj_children (var
, NULL
, NULL
, NULL
, NULL
, &dummy
,
1276 var
->num_children
= number_of_children (var
);
1279 return var
->num_children
>= 0 ? var
->num_children
: 0;
1282 /* Creates a list of the immediate children of a variable object;
1283 the return code is the number of such children or -1 on error. */
1286 varobj_list_children (struct varobj
*var
, int *from
, int *to
)
1289 int i
, children_changed
;
1291 var
->children_requested
= 1;
1293 if (var
->pretty_printer
)
1295 /* This, in theory, can result in the number of children changing without
1296 frontend noticing. But well, calling -var-list-children on the same
1297 varobj twice is not something a sane frontend would do. */
1298 update_dynamic_varobj_children (var
, NULL
, NULL
, NULL
, NULL
,
1299 &children_changed
, 0, 0, *to
);
1300 restrict_range (var
->children
, from
, to
);
1301 return var
->children
;
1304 if (var
->num_children
== -1)
1305 var
->num_children
= number_of_children (var
);
1307 /* If that failed, give up. */
1308 if (var
->num_children
== -1)
1309 return var
->children
;
1311 /* If we're called when the list of children is not yet initialized,
1312 allocate enough elements in it. */
1313 while (VEC_length (varobj_p
, var
->children
) < var
->num_children
)
1314 VEC_safe_push (varobj_p
, var
->children
, NULL
);
1316 for (i
= 0; i
< var
->num_children
; i
++)
1318 varobj_p existing
= VEC_index (varobj_p
, var
->children
, i
);
1320 if (existing
== NULL
)
1322 /* Either it's the first call to varobj_list_children for
1323 this variable object, and the child was never created,
1324 or it was explicitly deleted by the client. */
1325 name
= name_of_child (var
, i
);
1326 existing
= create_child (var
, i
, name
);
1327 VEC_replace (varobj_p
, var
->children
, i
, existing
);
1331 restrict_range (var
->children
, from
, to
);
1332 return var
->children
;
1337 static struct varobj
*
1338 varobj_add_child (struct varobj
*var
, const char *name
, struct value
*value
)
1340 varobj_p v
= create_child_with_value (var
,
1341 VEC_length (varobj_p
, var
->children
),
1344 VEC_safe_push (varobj_p
, var
->children
, v
);
1348 #endif /* HAVE_PYTHON */
1350 /* Obtain the type of an object Variable as a string similar to the one gdb
1351 prints on the console. */
1354 varobj_get_type (struct varobj
*var
)
1356 /* For the "fake" variables, do not return a type. (It's type is
1358 Do not return a type for invalid variables as well. */
1359 if (CPLUS_FAKE_CHILD (var
) || !var
->root
->is_valid
)
1362 return type_to_string (var
->type
);
1365 /* Obtain the type of an object variable. */
1368 varobj_get_gdb_type (struct varobj
*var
)
1373 /* Is VAR a path expression parent, i.e., can it be used to construct
1374 a valid path expression? */
1377 is_path_expr_parent (struct varobj
*var
)
1381 /* "Fake" children are not path_expr parents. */
1382 if (CPLUS_FAKE_CHILD (var
))
1385 type
= get_value_type (var
);
1387 /* Anonymous unions and structs are also not path_expr parents. */
1388 return !((TYPE_CODE (type
) == TYPE_CODE_STRUCT
1389 || TYPE_CODE (type
) == TYPE_CODE_UNION
)
1390 && TYPE_NAME (type
) == NULL
);
1393 /* Return the path expression parent for VAR. */
1395 static struct varobj
*
1396 get_path_expr_parent (struct varobj
*var
)
1398 struct varobj
*parent
= var
;
1400 while (!is_root_p (parent
) && !is_path_expr_parent (parent
))
1401 parent
= parent
->parent
;
1406 /* Return a pointer to the full rooted expression of varobj VAR.
1407 If it has not been computed yet, compute it. */
1409 varobj_get_path_expr (struct varobj
*var
)
1411 if (var
->path_expr
!= NULL
)
1412 return var
->path_expr
;
1415 /* For root varobjs, we initialize path_expr
1416 when creating varobj, so here it should be
1418 gdb_assert (!is_root_p (var
));
1419 return (*var
->root
->lang
->path_expr_of_child
) (var
);
1423 enum varobj_languages
1424 varobj_get_language (struct varobj
*var
)
1426 return variable_language (var
);
1430 varobj_get_attributes (struct varobj
*var
)
1434 if (varobj_editable_p (var
))
1435 /* FIXME: define masks for attributes. */
1436 attributes
|= 0x00000001; /* Editable */
1442 varobj_pretty_printed_p (struct varobj
*var
)
1444 return var
->pretty_printer
!= NULL
;
1448 varobj_get_formatted_value (struct varobj
*var
,
1449 enum varobj_display_formats format
)
1451 return my_value_of_variable (var
, format
);
1455 varobj_get_value (struct varobj
*var
)
1457 return my_value_of_variable (var
, var
->format
);
1460 /* Set the value of an object variable (if it is editable) to the
1461 value of the given expression. */
1462 /* Note: Invokes functions that can call error(). */
1465 varobj_set_value (struct varobj
*var
, char *expression
)
1467 struct value
*val
= NULL
; /* Initialize to keep gcc happy. */
1468 /* The argument "expression" contains the variable's new value.
1469 We need to first construct a legal expression for this -- ugh! */
1470 /* Does this cover all the bases? */
1471 struct expression
*exp
;
1472 struct value
*value
= NULL
; /* Initialize to keep gcc happy. */
1473 int saved_input_radix
= input_radix
;
1474 const char *s
= expression
;
1475 volatile struct gdb_exception except
;
1477 gdb_assert (varobj_editable_p (var
));
1479 input_radix
= 10; /* ALWAYS reset to decimal temporarily. */
1480 exp
= parse_exp_1 (&s
, 0, 0, 0);
1481 TRY_CATCH (except
, RETURN_MASK_ERROR
)
1483 value
= evaluate_expression (exp
);
1486 if (except
.reason
< 0)
1488 /* We cannot proceed without a valid expression. */
1493 /* All types that are editable must also be changeable. */
1494 gdb_assert (varobj_value_is_changeable_p (var
));
1496 /* The value of a changeable variable object must not be lazy. */
1497 gdb_assert (!value_lazy (var
->value
));
1499 /* Need to coerce the input. We want to check if the
1500 value of the variable object will be different
1501 after assignment, and the first thing value_assign
1502 does is coerce the input.
1503 For example, if we are assigning an array to a pointer variable we
1504 should compare the pointer with the array's address, not with the
1506 value
= coerce_array (value
);
1508 /* The new value may be lazy. value_assign, or
1509 rather value_contents, will take care of this. */
1510 TRY_CATCH (except
, RETURN_MASK_ERROR
)
1512 val
= value_assign (var
->value
, value
);
1515 if (except
.reason
< 0)
1518 /* If the value has changed, record it, so that next -var-update can
1519 report this change. If a variable had a value of '1', we've set it
1520 to '333' and then set again to '1', when -var-update will report this
1521 variable as changed -- because the first assignment has set the
1522 'updated' flag. There's no need to optimize that, because return value
1523 of -var-update should be considered an approximation. */
1524 var
->updated
= install_new_value (var
, val
, 0 /* Compare values. */);
1525 input_radix
= saved_input_radix
;
1531 /* A helper function to install a constructor function and visualizer
1535 install_visualizer (struct varobj
*var
, PyObject
*constructor
,
1536 PyObject
*visualizer
)
1538 Py_XDECREF (var
->constructor
);
1539 var
->constructor
= constructor
;
1541 Py_XDECREF (var
->pretty_printer
);
1542 var
->pretty_printer
= visualizer
;
1544 Py_XDECREF (var
->child_iter
);
1545 var
->child_iter
= NULL
;
1548 /* Install the default visualizer for VAR. */
1551 install_default_visualizer (struct varobj
*var
)
1553 /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */
1554 if (CPLUS_FAKE_CHILD (var
))
1557 if (pretty_printing
)
1559 PyObject
*pretty_printer
= NULL
;
1563 pretty_printer
= gdbpy_get_varobj_pretty_printer (var
->value
);
1564 if (! pretty_printer
)
1566 gdbpy_print_stack ();
1567 error (_("Cannot instantiate printer for default visualizer"));
1571 if (pretty_printer
== Py_None
)
1573 Py_DECREF (pretty_printer
);
1574 pretty_printer
= NULL
;
1577 install_visualizer (var
, NULL
, pretty_printer
);
1581 /* Instantiate and install a visualizer for VAR using CONSTRUCTOR to
1582 make a new object. */
1585 construct_visualizer (struct varobj
*var
, PyObject
*constructor
)
1587 PyObject
*pretty_printer
;
1589 /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */
1590 if (CPLUS_FAKE_CHILD (var
))
1593 Py_INCREF (constructor
);
1594 if (constructor
== Py_None
)
1595 pretty_printer
= NULL
;
1598 pretty_printer
= instantiate_pretty_printer (constructor
, var
->value
);
1599 if (! pretty_printer
)
1601 gdbpy_print_stack ();
1602 Py_DECREF (constructor
);
1603 constructor
= Py_None
;
1604 Py_INCREF (constructor
);
1607 if (pretty_printer
== Py_None
)
1609 Py_DECREF (pretty_printer
);
1610 pretty_printer
= NULL
;
1614 install_visualizer (var
, constructor
, pretty_printer
);
1617 #endif /* HAVE_PYTHON */
1619 /* A helper function for install_new_value. This creates and installs
1620 a visualizer for VAR, if appropriate. */
1623 install_new_value_visualizer (struct varobj
*var
)
1626 /* If the constructor is None, then we want the raw value. If VAR
1627 does not have a value, just skip this. */
1628 if (!gdb_python_initialized
)
1631 if (var
->constructor
!= Py_None
&& var
->value
)
1633 struct cleanup
*cleanup
;
1635 cleanup
= varobj_ensure_python_env (var
);
1637 if (!var
->constructor
)
1638 install_default_visualizer (var
);
1640 construct_visualizer (var
, var
->constructor
);
1642 do_cleanups (cleanup
);
1649 /* When using RTTI to determine variable type it may be changed in runtime when
1650 the variable value is changed. This function checks whether type of varobj
1651 VAR will change when a new value NEW_VALUE is assigned and if it is so
1652 updates the type of VAR. */
1655 update_type_if_necessary (struct varobj
*var
, struct value
*new_value
)
1659 struct value_print_options opts
;
1661 get_user_print_options (&opts
);
1662 if (opts
.objectprint
)
1664 struct type
*new_type
;
1665 char *curr_type_str
, *new_type_str
;
1667 new_type
= value_actual_type (new_value
, 0, 0);
1668 new_type_str
= type_to_string (new_type
);
1669 curr_type_str
= varobj_get_type (var
);
1670 if (strcmp (curr_type_str
, new_type_str
) != 0)
1672 var
->type
= new_type
;
1674 /* This information may be not valid for a new type. */
1675 varobj_delete (var
, NULL
, 1);
1676 VEC_free (varobj_p
, var
->children
);
1677 var
->num_children
= -1;
1686 /* Assign a new value to a variable object. If INITIAL is non-zero,
1687 this is the first assignement after the variable object was just
1688 created, or changed type. In that case, just assign the value
1690 Otherwise, assign the new value, and return 1 if the value is
1691 different from the current one, 0 otherwise. The comparison is
1692 done on textual representation of value. Therefore, some types
1693 need not be compared. E.g. for structures the reported value is
1694 always "{...}", so no comparison is necessary here. If the old
1695 value was NULL and new one is not, or vice versa, we always return 1.
1697 The VALUE parameter should not be released -- the function will
1698 take care of releasing it when needed. */
1700 install_new_value (struct varobj
*var
, struct value
*value
, int initial
)
1705 int intentionally_not_fetched
= 0;
1706 char *print_value
= NULL
;
1708 /* We need to know the varobj's type to decide if the value should
1709 be fetched or not. C++ fake children (public/protected/private)
1710 don't have a type. */
1711 gdb_assert (var
->type
|| CPLUS_FAKE_CHILD (var
));
1712 changeable
= varobj_value_is_changeable_p (var
);
1714 /* If the type has custom visualizer, we consider it to be always
1715 changeable. FIXME: need to make sure this behaviour will not
1716 mess up read-sensitive values. */
1717 if (var
->pretty_printer
)
1720 need_to_fetch
= changeable
;
1722 /* We are not interested in the address of references, and given
1723 that in C++ a reference is not rebindable, it cannot
1724 meaningfully change. So, get hold of the real value. */
1726 value
= coerce_ref (value
);
1728 if (var
->type
&& TYPE_CODE (var
->type
) == TYPE_CODE_UNION
)
1729 /* For unions, we need to fetch the value implicitly because
1730 of implementation of union member fetch. When gdb
1731 creates a value for a field and the value of the enclosing
1732 structure is not lazy, it immediately copies the necessary
1733 bytes from the enclosing values. If the enclosing value is
1734 lazy, the call to value_fetch_lazy on the field will read
1735 the data from memory. For unions, that means we'll read the
1736 same memory more than once, which is not desirable. So
1740 /* The new value might be lazy. If the type is changeable,
1741 that is we'll be comparing values of this type, fetch the
1742 value now. Otherwise, on the next update the old value
1743 will be lazy, which means we've lost that old value. */
1744 if (need_to_fetch
&& value
&& value_lazy (value
))
1746 struct varobj
*parent
= var
->parent
;
1747 int frozen
= var
->frozen
;
1749 for (; !frozen
&& parent
; parent
= parent
->parent
)
1750 frozen
|= parent
->frozen
;
1752 if (frozen
&& initial
)
1754 /* For variables that are frozen, or are children of frozen
1755 variables, we don't do fetch on initial assignment.
1756 For non-initial assignemnt we do the fetch, since it means we're
1757 explicitly asked to compare the new value with the old one. */
1758 intentionally_not_fetched
= 1;
1762 volatile struct gdb_exception except
;
1764 TRY_CATCH (except
, RETURN_MASK_ERROR
)
1766 value_fetch_lazy (value
);
1769 if (except
.reason
< 0)
1771 /* Set the value to NULL, so that for the next -var-update,
1772 we don't try to compare the new value with this value,
1773 that we couldn't even read. */
1779 /* Get a reference now, before possibly passing it to any Python
1780 code that might release it. */
1782 value_incref (value
);
1784 /* Below, we'll be comparing string rendering of old and new
1785 values. Don't get string rendering if the value is
1786 lazy -- if it is, the code above has decided that the value
1787 should not be fetched. */
1788 if (value
&& !value_lazy (value
) && !var
->pretty_printer
)
1789 print_value
= value_get_print_value (value
, var
->format
, var
);
1791 /* If the type is changeable, compare the old and the new values.
1792 If this is the initial assignment, we don't have any old value
1794 if (!initial
&& changeable
)
1796 /* If the value of the varobj was changed by -var-set-value,
1797 then the value in the varobj and in the target is the same.
1798 However, that value is different from the value that the
1799 varobj had after the previous -var-update. So need to the
1800 varobj as changed. */
1805 else if (! var
->pretty_printer
)
1807 /* Try to compare the values. That requires that both
1808 values are non-lazy. */
1809 if (var
->not_fetched
&& value_lazy (var
->value
))
1811 /* This is a frozen varobj and the value was never read.
1812 Presumably, UI shows some "never read" indicator.
1813 Now that we've fetched the real value, we need to report
1814 this varobj as changed so that UI can show the real
1818 else if (var
->value
== NULL
&& value
== NULL
)
1821 else if (var
->value
== NULL
|| value
== NULL
)
1827 gdb_assert (!value_lazy (var
->value
));
1828 gdb_assert (!value_lazy (value
));
1830 gdb_assert (var
->print_value
!= NULL
&& print_value
!= NULL
);
1831 if (strcmp (var
->print_value
, print_value
) != 0)
1837 if (!initial
&& !changeable
)
1839 /* For values that are not changeable, we don't compare the values.
1840 However, we want to notice if a value was not NULL and now is NULL,
1841 or vise versa, so that we report when top-level varobjs come in scope
1842 and leave the scope. */
1843 changed
= (var
->value
!= NULL
) != (value
!= NULL
);
1846 /* We must always keep the new value, since children depend on it. */
1847 if (var
->value
!= NULL
&& var
->value
!= value
)
1848 value_free (var
->value
);
1850 if (value
&& value_lazy (value
) && intentionally_not_fetched
)
1851 var
->not_fetched
= 1;
1853 var
->not_fetched
= 0;
1856 install_new_value_visualizer (var
);
1858 /* If we installed a pretty-printer, re-compare the printed version
1859 to see if the variable changed. */
1860 if (var
->pretty_printer
)
1862 xfree (print_value
);
1863 print_value
= value_get_print_value (var
->value
, var
->format
, var
);
1864 if ((var
->print_value
== NULL
&& print_value
!= NULL
)
1865 || (var
->print_value
!= NULL
&& print_value
== NULL
)
1866 || (var
->print_value
!= NULL
&& print_value
!= NULL
1867 && strcmp (var
->print_value
, print_value
) != 0))
1870 if (var
->print_value
)
1871 xfree (var
->print_value
);
1872 var
->print_value
= print_value
;
1874 gdb_assert (!var
->value
|| value_type (var
->value
));
1879 /* Return the requested range for a varobj. VAR is the varobj. FROM
1880 and TO are out parameters; *FROM and *TO will be set to the
1881 selected sub-range of VAR. If no range was selected using
1882 -var-set-update-range, then both will be -1. */
1884 varobj_get_child_range (struct varobj
*var
, int *from
, int *to
)
1890 /* Set the selected sub-range of children of VAR to start at index
1891 FROM and end at index TO. If either FROM or TO is less than zero,
1892 this is interpreted as a request for all children. */
1894 varobj_set_child_range (struct varobj
*var
, int from
, int to
)
1901 varobj_set_visualizer (struct varobj
*var
, const char *visualizer
)
1904 PyObject
*mainmod
, *globals
, *constructor
;
1905 struct cleanup
*back_to
;
1907 if (!gdb_python_initialized
)
1910 back_to
= varobj_ensure_python_env (var
);
1912 mainmod
= PyImport_AddModule ("__main__");
1913 globals
= PyModule_GetDict (mainmod
);
1914 Py_INCREF (globals
);
1915 make_cleanup_py_decref (globals
);
1917 constructor
= PyRun_String (visualizer
, Py_eval_input
, globals
, globals
);
1921 gdbpy_print_stack ();
1922 error (_("Could not evaluate visualizer expression: %s"), visualizer
);
1925 construct_visualizer (var
, constructor
);
1926 Py_XDECREF (constructor
);
1928 /* If there are any children now, wipe them. */
1929 varobj_delete (var
, NULL
, 1 /* children only */);
1930 var
->num_children
= -1;
1932 do_cleanups (back_to
);
1934 error (_("Python support required"));
1938 /* If NEW_VALUE is the new value of the given varobj (var), return
1939 non-zero if var has mutated. In other words, if the type of
1940 the new value is different from the type of the varobj's old
1943 NEW_VALUE may be NULL, if the varobj is now out of scope. */
1946 varobj_value_has_mutated (struct varobj
*var
, struct value
*new_value
,
1947 struct type
*new_type
)
1949 /* If we haven't previously computed the number of children in var,
1950 it does not matter from the front-end's perspective whether
1951 the type has mutated or not. For all intents and purposes,
1952 it has not mutated. */
1953 if (var
->num_children
< 0)
1956 if (var
->root
->lang
->value_has_mutated
)
1957 return var
->root
->lang
->value_has_mutated (var
, new_value
, new_type
);
1962 /* Update the values for a variable and its children. This is a
1963 two-pronged attack. First, re-parse the value for the root's
1964 expression to see if it's changed. Then go all the way
1965 through its children, reconstructing them and noting if they've
1968 The EXPLICIT parameter specifies if this call is result
1969 of MI request to update this specific variable, or
1970 result of implicit -var-update *. For implicit request, we don't
1971 update frozen variables.
1973 NOTE: This function may delete the caller's varobj. If it
1974 returns TYPE_CHANGED, then it has done this and VARP will be modified
1975 to point to the new varobj. */
1977 VEC(varobj_update_result
) *
1978 varobj_update (struct varobj
**varp
, int explicit)
1980 int type_changed
= 0;
1983 VEC (varobj_update_result
) *stack
= NULL
;
1984 VEC (varobj_update_result
) *result
= NULL
;
1986 /* Frozen means frozen -- we don't check for any change in
1987 this varobj, including its going out of scope, or
1988 changing type. One use case for frozen varobjs is
1989 retaining previously evaluated expressions, and we don't
1990 want them to be reevaluated at all. */
1991 if (!explicit && (*varp
)->frozen
)
1994 if (!(*varp
)->root
->is_valid
)
1996 varobj_update_result r
= {0};
1999 r
.status
= VAROBJ_INVALID
;
2000 VEC_safe_push (varobj_update_result
, result
, &r
);
2004 if ((*varp
)->root
->rootvar
== *varp
)
2006 varobj_update_result r
= {0};
2009 r
.status
= VAROBJ_IN_SCOPE
;
2011 /* Update the root variable. value_of_root can return NULL
2012 if the variable is no longer around, i.e. we stepped out of
2013 the frame in which a local existed. We are letting the
2014 value_of_root variable dispose of the varobj if the type
2016 new = value_of_root (varp
, &type_changed
);
2017 if (update_type_if_necessary(*varp
, new))
2020 r
.type_changed
= type_changed
;
2021 if (install_new_value ((*varp
), new, type_changed
))
2025 r
.status
= VAROBJ_NOT_IN_SCOPE
;
2026 r
.value_installed
= 1;
2028 if (r
.status
== VAROBJ_NOT_IN_SCOPE
)
2030 if (r
.type_changed
|| r
.changed
)
2031 VEC_safe_push (varobj_update_result
, result
, &r
);
2035 VEC_safe_push (varobj_update_result
, stack
, &r
);
2039 varobj_update_result r
= {0};
2042 VEC_safe_push (varobj_update_result
, stack
, &r
);
2045 /* Walk through the children, reconstructing them all. */
2046 while (!VEC_empty (varobj_update_result
, stack
))
2048 varobj_update_result r
= *(VEC_last (varobj_update_result
, stack
));
2049 struct varobj
*v
= r
.varobj
;
2051 VEC_pop (varobj_update_result
, stack
);
2053 /* Update this variable, unless it's a root, which is already
2055 if (!r
.value_installed
)
2057 struct type
*new_type
;
2059 new = value_of_child (v
->parent
, v
->index
);
2060 if (update_type_if_necessary(v
, new))
2063 new_type
= value_type (new);
2065 new_type
= v
->root
->lang
->type_of_child (v
->parent
, v
->index
);
2067 if (varobj_value_has_mutated (v
, new, new_type
))
2069 /* The children are no longer valid; delete them now.
2070 Report the fact that its type changed as well. */
2071 varobj_delete (v
, NULL
, 1 /* only_children */);
2072 v
->num_children
= -1;
2079 if (install_new_value (v
, new, r
.type_changed
))
2086 /* We probably should not get children of a varobj that has a
2087 pretty-printer, but for which -var-list-children was never
2089 if (v
->pretty_printer
)
2091 VEC (varobj_p
) *changed
= 0, *type_changed
= 0, *unchanged
= 0;
2092 VEC (varobj_p
) *new = 0;
2093 int i
, children_changed
= 0;
2098 if (!v
->children_requested
)
2102 /* If we initially did not have potential children, but
2103 now we do, consider the varobj as changed.
2104 Otherwise, if children were never requested, consider
2105 it as unchanged -- presumably, such varobj is not yet
2106 expanded in the UI, so we need not bother getting
2108 if (!varobj_has_more (v
, 0))
2110 update_dynamic_varobj_children (v
, NULL
, NULL
, NULL
, NULL
,
2112 if (varobj_has_more (v
, 0))
2117 VEC_safe_push (varobj_update_result
, result
, &r
);
2122 /* If update_dynamic_varobj_children returns 0, then we have
2123 a non-conforming pretty-printer, so we skip it. */
2124 if (update_dynamic_varobj_children (v
, &changed
, &type_changed
, &new,
2125 &unchanged
, &children_changed
, 1,
2128 if (children_changed
|| new)
2130 r
.children_changed
= 1;
2133 /* Push in reverse order so that the first child is
2134 popped from the work stack first, and so will be
2135 added to result first. This does not affect
2136 correctness, just "nicer". */
2137 for (i
= VEC_length (varobj_p
, type_changed
) - 1; i
>= 0; --i
)
2139 varobj_p tmp
= VEC_index (varobj_p
, type_changed
, i
);
2140 varobj_update_result r
= {0};
2142 /* Type may change only if value was changed. */
2146 r
.value_installed
= 1;
2147 VEC_safe_push (varobj_update_result
, stack
, &r
);
2149 for (i
= VEC_length (varobj_p
, changed
) - 1; i
>= 0; --i
)
2151 varobj_p tmp
= VEC_index (varobj_p
, changed
, i
);
2152 varobj_update_result r
= {0};
2156 r
.value_installed
= 1;
2157 VEC_safe_push (varobj_update_result
, stack
, &r
);
2159 for (i
= VEC_length (varobj_p
, unchanged
) - 1; i
>= 0; --i
)
2161 varobj_p tmp
= VEC_index (varobj_p
, unchanged
, i
);
2165 varobj_update_result r
= {0};
2168 r
.value_installed
= 1;
2169 VEC_safe_push (varobj_update_result
, stack
, &r
);
2172 if (r
.changed
|| r
.children_changed
)
2173 VEC_safe_push (varobj_update_result
, result
, &r
);
2175 /* Free CHANGED, TYPE_CHANGED and UNCHANGED, but not NEW,
2176 because NEW has been put into the result vector. */
2177 VEC_free (varobj_p
, changed
);
2178 VEC_free (varobj_p
, type_changed
);
2179 VEC_free (varobj_p
, unchanged
);
2185 /* Push any children. Use reverse order so that the first
2186 child is popped from the work stack first, and so
2187 will be added to result first. This does not
2188 affect correctness, just "nicer". */
2189 for (i
= VEC_length (varobj_p
, v
->children
)-1; i
>= 0; --i
)
2191 varobj_p c
= VEC_index (varobj_p
, v
->children
, i
);
2193 /* Child may be NULL if explicitly deleted by -var-delete. */
2194 if (c
!= NULL
&& !c
->frozen
)
2196 varobj_update_result r
= {0};
2199 VEC_safe_push (varobj_update_result
, stack
, &r
);
2203 if (r
.changed
|| r
.type_changed
)
2204 VEC_safe_push (varobj_update_result
, result
, &r
);
2207 VEC_free (varobj_update_result
, stack
);
2213 /* Helper functions */
2216 * Variable object construction/destruction
2220 delete_variable (struct cpstack
**resultp
, struct varobj
*var
,
2221 int only_children_p
)
2225 delete_variable_1 (resultp
, &delcount
, var
,
2226 only_children_p
, 1 /* remove_from_parent_p */ );
2231 /* Delete the variable object VAR and its children. */
2232 /* IMPORTANT NOTE: If we delete a variable which is a child
2233 and the parent is not removed we dump core. It must be always
2234 initially called with remove_from_parent_p set. */
2236 delete_variable_1 (struct cpstack
**resultp
, int *delcountp
,
2237 struct varobj
*var
, int only_children_p
,
2238 int remove_from_parent_p
)
2242 /* Delete any children of this variable, too. */
2243 for (i
= 0; i
< VEC_length (varobj_p
, var
->children
); ++i
)
2245 varobj_p child
= VEC_index (varobj_p
, var
->children
, i
);
2249 if (!remove_from_parent_p
)
2250 child
->parent
= NULL
;
2251 delete_variable_1 (resultp
, delcountp
, child
, 0, only_children_p
);
2253 VEC_free (varobj_p
, var
->children
);
2255 /* if we were called to delete only the children we are done here. */
2256 if (only_children_p
)
2259 /* Otherwise, add it to the list of deleted ones and proceed to do so. */
2260 /* If the name is null, this is a temporary variable, that has not
2261 yet been installed, don't report it, it belongs to the caller... */
2262 if (var
->obj_name
!= NULL
)
2264 cppush (resultp
, xstrdup (var
->obj_name
));
2265 *delcountp
= *delcountp
+ 1;
2268 /* If this variable has a parent, remove it from its parent's list. */
2269 /* OPTIMIZATION: if the parent of this variable is also being deleted,
2270 (as indicated by remove_from_parent_p) we don't bother doing an
2271 expensive list search to find the element to remove when we are
2272 discarding the list afterwards. */
2273 if ((remove_from_parent_p
) && (var
->parent
!= NULL
))
2275 VEC_replace (varobj_p
, var
->parent
->children
, var
->index
, NULL
);
2278 if (var
->obj_name
!= NULL
)
2279 uninstall_variable (var
);
2281 /* Free memory associated with this variable. */
2282 free_variable (var
);
2285 /* Install the given variable VAR with the object name VAR->OBJ_NAME. */
2287 install_variable (struct varobj
*var
)
2290 struct vlist
*newvl
;
2292 unsigned int index
= 0;
2295 for (chp
= var
->obj_name
; *chp
; chp
++)
2297 index
= (index
+ (i
++ * (unsigned int) *chp
)) % VAROBJ_TABLE_SIZE
;
2300 cv
= *(varobj_table
+ index
);
2301 while ((cv
!= NULL
) && (strcmp (cv
->var
->obj_name
, var
->obj_name
) != 0))
2305 error (_("Duplicate variable object name"));
2307 /* Add varobj to hash table. */
2308 newvl
= xmalloc (sizeof (struct vlist
));
2309 newvl
->next
= *(varobj_table
+ index
);
2311 *(varobj_table
+ index
) = newvl
;
2313 /* If root, add varobj to root list. */
2314 if (is_root_p (var
))
2316 /* Add to list of root variables. */
2317 if (rootlist
== NULL
)
2318 var
->root
->next
= NULL
;
2320 var
->root
->next
= rootlist
;
2321 rootlist
= var
->root
;
2327 /* Unistall the object VAR. */
2329 uninstall_variable (struct varobj
*var
)
2333 struct varobj_root
*cr
;
2334 struct varobj_root
*prer
;
2336 unsigned int index
= 0;
2339 /* Remove varobj from hash table. */
2340 for (chp
= var
->obj_name
; *chp
; chp
++)
2342 index
= (index
+ (i
++ * (unsigned int) *chp
)) % VAROBJ_TABLE_SIZE
;
2345 cv
= *(varobj_table
+ index
);
2347 while ((cv
!= NULL
) && (strcmp (cv
->var
->obj_name
, var
->obj_name
) != 0))
2354 fprintf_unfiltered (gdb_stdlog
, "Deleting %s\n", var
->obj_name
);
2359 ("Assertion failed: Could not find variable object \"%s\" to delete",
2365 *(varobj_table
+ index
) = cv
->next
;
2367 prev
->next
= cv
->next
;
2371 /* If root, remove varobj from root list. */
2372 if (is_root_p (var
))
2374 /* Remove from list of root variables. */
2375 if (rootlist
== var
->root
)
2376 rootlist
= var
->root
->next
;
2381 while ((cr
!= NULL
) && (cr
->rootvar
!= var
))
2388 warning (_("Assertion failed: Could not find "
2389 "varobj \"%s\" in root list"),
2396 prer
->next
= cr
->next
;
2402 /* Create and install a child of the parent of the given name. */
2403 static struct varobj
*
2404 create_child (struct varobj
*parent
, int index
, char *name
)
2406 return create_child_with_value (parent
, index
, name
,
2407 value_of_child (parent
, index
));
2410 /* Does CHILD represent a child with no name? This happens when
2411 the child is an anonmous struct or union and it has no field name
2412 in its parent variable.
2414 This has already been determined by *_describe_child. The easiest
2415 thing to do is to compare the child's name with ANONYMOUS_*_NAME. */
2418 is_anonymous_child (struct varobj
*child
)
2420 return (strcmp (child
->name
, ANONYMOUS_STRUCT_NAME
) == 0
2421 || strcmp (child
->name
, ANONYMOUS_UNION_NAME
) == 0);
2424 static struct varobj
*
2425 create_child_with_value (struct varobj
*parent
, int index
, const char *name
,
2426 struct value
*value
)
2428 struct varobj
*child
;
2431 child
= new_variable ();
2433 /* Name is allocated by name_of_child. */
2434 /* FIXME: xstrdup should not be here. */
2435 child
->name
= xstrdup (name
);
2436 child
->index
= index
;
2437 child
->parent
= parent
;
2438 child
->root
= parent
->root
;
2440 if (is_anonymous_child (child
))
2441 childs_name
= xstrprintf ("%s.%d_anonymous", parent
->obj_name
, index
);
2443 childs_name
= xstrprintf ("%s.%s", parent
->obj_name
, name
);
2444 child
->obj_name
= childs_name
;
2446 install_variable (child
);
2448 /* Compute the type of the child. Must do this before
2449 calling install_new_value. */
2451 /* If the child had no evaluation errors, var->value
2452 will be non-NULL and contain a valid type. */
2453 child
->type
= value_actual_type (value
, 0, NULL
);
2455 /* Otherwise, we must compute the type. */
2456 child
->type
= (*child
->root
->lang
->type_of_child
) (child
->parent
,
2458 install_new_value (child
, value
, 1);
2465 * Miscellaneous utility functions.
2468 /* Allocate memory and initialize a new variable. */
2469 static struct varobj
*
2474 var
= (struct varobj
*) xmalloc (sizeof (struct varobj
));
2476 var
->path_expr
= NULL
;
2477 var
->obj_name
= NULL
;
2481 var
->num_children
= -1;
2483 var
->children
= NULL
;
2487 var
->print_value
= NULL
;
2489 var
->not_fetched
= 0;
2490 var
->children_requested
= 0;
2493 var
->constructor
= 0;
2494 var
->pretty_printer
= 0;
2495 var
->child_iter
= 0;
2496 var
->saved_item
= 0;
2501 /* Allocate memory and initialize a new root variable. */
2502 static struct varobj
*
2503 new_root_variable (void)
2505 struct varobj
*var
= new_variable ();
2507 var
->root
= (struct varobj_root
*) xmalloc (sizeof (struct varobj_root
));
2508 var
->root
->lang
= NULL
;
2509 var
->root
->exp
= NULL
;
2510 var
->root
->valid_block
= NULL
;
2511 var
->root
->frame
= null_frame_id
;
2512 var
->root
->floating
= 0;
2513 var
->root
->rootvar
= NULL
;
2514 var
->root
->is_valid
= 1;
2519 /* Free any allocated memory associated with VAR. */
2521 free_variable (struct varobj
*var
)
2524 if (var
->pretty_printer
)
2526 struct cleanup
*cleanup
= varobj_ensure_python_env (var
);
2527 Py_XDECREF (var
->constructor
);
2528 Py_XDECREF (var
->pretty_printer
);
2529 Py_XDECREF (var
->child_iter
);
2530 Py_XDECREF (var
->saved_item
);
2531 do_cleanups (cleanup
);
2535 value_free (var
->value
);
2537 /* Free the expression if this is a root variable. */
2538 if (is_root_p (var
))
2540 xfree (var
->root
->exp
);
2545 xfree (var
->obj_name
);
2546 xfree (var
->print_value
);
2547 xfree (var
->path_expr
);
2552 do_free_variable_cleanup (void *var
)
2554 free_variable (var
);
2557 static struct cleanup
*
2558 make_cleanup_free_variable (struct varobj
*var
)
2560 return make_cleanup (do_free_variable_cleanup
, var
);
2563 /* This returns the type of the variable. It also skips past typedefs
2564 to return the real type of the variable.
2566 NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file
2567 except within get_target_type and get_type. */
2568 static struct type
*
2569 get_type (struct varobj
*var
)
2575 type
= check_typedef (type
);
2580 /* Return the type of the value that's stored in VAR,
2581 or that would have being stored there if the
2582 value were accessible.
2584 This differs from VAR->type in that VAR->type is always
2585 the true type of the expession in the source language.
2586 The return value of this function is the type we're
2587 actually storing in varobj, and using for displaying
2588 the values and for comparing previous and new values.
2590 For example, top-level references are always stripped. */
2591 static struct type
*
2592 get_value_type (struct varobj
*var
)
2597 type
= value_type (var
->value
);
2601 type
= check_typedef (type
);
2603 if (TYPE_CODE (type
) == TYPE_CODE_REF
)
2604 type
= get_target_type (type
);
2606 type
= check_typedef (type
);
2611 /* This returns the target type (or NULL) of TYPE, also skipping
2612 past typedefs, just like get_type ().
2614 NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file
2615 except within get_target_type and get_type. */
2616 static struct type
*
2617 get_target_type (struct type
*type
)
2621 type
= TYPE_TARGET_TYPE (type
);
2623 type
= check_typedef (type
);
2629 /* What is the default display for this variable? We assume that
2630 everything is "natural". Any exceptions? */
2631 static enum varobj_display_formats
2632 variable_default_display (struct varobj
*var
)
2634 return FORMAT_NATURAL
;
2637 /* FIXME: The following should be generic for any pointer. */
2639 cppush (struct cpstack
**pstack
, char *name
)
2643 s
= (struct cpstack
*) xmalloc (sizeof (struct cpstack
));
2649 /* FIXME: The following should be generic for any pointer. */
2651 cppop (struct cpstack
**pstack
)
2656 if ((*pstack
)->name
== NULL
&& (*pstack
)->next
== NULL
)
2661 *pstack
= (*pstack
)->next
;
2668 * Language-dependencies
2671 /* Common entry points */
2673 /* Get the language of variable VAR. */
2674 static enum varobj_languages
2675 variable_language (struct varobj
*var
)
2677 enum varobj_languages lang
;
2679 switch (var
->root
->exp
->language_defn
->la_language
)
2685 case language_cplus
:
2699 /* Return the number of children for a given variable.
2700 The result of this function is defined by the language
2701 implementation. The number of children returned by this function
2702 is the number of children that the user will see in the variable
2705 number_of_children (struct varobj
*var
)
2707 return (*var
->root
->lang
->number_of_children
) (var
);
2710 /* What is the expression for the root varobj VAR? Returns a malloc'd
2713 name_of_variable (struct varobj
*var
)
2715 return (*var
->root
->lang
->name_of_variable
) (var
);
2718 /* What is the name of the INDEX'th child of VAR? Returns a malloc'd
2721 name_of_child (struct varobj
*var
, int index
)
2723 return (*var
->root
->lang
->name_of_child
) (var
, index
);
2726 /* What is the ``struct value *'' of the root variable VAR?
2727 For floating variable object, evaluation can get us a value
2728 of different type from what is stored in varobj already. In
2730 - *type_changed will be set to 1
2731 - old varobj will be freed, and new one will be
2732 created, with the same name.
2733 - *var_handle will be set to the new varobj
2734 Otherwise, *type_changed will be set to 0. */
2735 static struct value
*
2736 value_of_root (struct varobj
**var_handle
, int *type_changed
)
2740 if (var_handle
== NULL
)
2745 /* This should really be an exception, since this should
2746 only get called with a root variable. */
2748 if (!is_root_p (var
))
2751 if (var
->root
->floating
)
2753 struct varobj
*tmp_var
;
2754 char *old_type
, *new_type
;
2756 tmp_var
= varobj_create (NULL
, var
->name
, (CORE_ADDR
) 0,
2757 USE_SELECTED_FRAME
);
2758 if (tmp_var
== NULL
)
2762 old_type
= varobj_get_type (var
);
2763 new_type
= varobj_get_type (tmp_var
);
2764 if (strcmp (old_type
, new_type
) == 0)
2766 /* The expression presently stored inside var->root->exp
2767 remembers the locations of local variables relatively to
2768 the frame where the expression was created (in DWARF location
2769 button, for example). Naturally, those locations are not
2770 correct in other frames, so update the expression. */
2772 struct expression
*tmp_exp
= var
->root
->exp
;
2774 var
->root
->exp
= tmp_var
->root
->exp
;
2775 tmp_var
->root
->exp
= tmp_exp
;
2777 varobj_delete (tmp_var
, NULL
, 0);
2782 tmp_var
->obj_name
= xstrdup (var
->obj_name
);
2783 tmp_var
->from
= var
->from
;
2784 tmp_var
->to
= var
->to
;
2785 varobj_delete (var
, NULL
, 0);
2787 install_variable (tmp_var
);
2788 *var_handle
= tmp_var
;
2801 struct value
*value
;
2803 value
= (*var
->root
->lang
->value_of_root
) (var_handle
);
2804 if (var
->value
== NULL
|| value
== NULL
)
2806 /* For root varobj-s, a NULL value indicates a scoping issue.
2807 So, nothing to do in terms of checking for mutations. */
2809 else if (varobj_value_has_mutated (var
, value
, value_type (value
)))
2811 /* The type has mutated, so the children are no longer valid.
2812 Just delete them, and tell our caller that the type has
2814 varobj_delete (var
, NULL
, 1 /* only_children */);
2815 var
->num_children
= -1;
2824 /* What is the ``struct value *'' for the INDEX'th child of PARENT? */
2825 static struct value
*
2826 value_of_child (struct varobj
*parent
, int index
)
2828 struct value
*value
;
2830 value
= (*parent
->root
->lang
->value_of_child
) (parent
, index
);
2835 /* GDB already has a command called "value_of_variable". Sigh. */
2837 my_value_of_variable (struct varobj
*var
, enum varobj_display_formats format
)
2839 if (var
->root
->is_valid
)
2841 if (var
->pretty_printer
)
2842 return value_get_print_value (var
->value
, var
->format
, var
);
2843 return (*var
->root
->lang
->value_of_variable
) (var
, format
);
2850 value_get_print_value (struct value
*value
, enum varobj_display_formats format
,
2853 struct ui_file
*stb
;
2854 struct cleanup
*old_chain
;
2855 char *thevalue
= NULL
;
2856 struct value_print_options opts
;
2857 struct type
*type
= NULL
;
2859 char *encoding
= NULL
;
2860 struct gdbarch
*gdbarch
= NULL
;
2861 /* Initialize it just to avoid a GCC false warning. */
2862 CORE_ADDR str_addr
= 0;
2863 int string_print
= 0;
2868 stb
= mem_fileopen ();
2869 old_chain
= make_cleanup_ui_file_delete (stb
);
2871 gdbarch
= get_type_arch (value_type (value
));
2873 if (gdb_python_initialized
)
2875 PyObject
*value_formatter
= var
->pretty_printer
;
2877 varobj_ensure_python_env (var
);
2879 if (value_formatter
)
2881 /* First check to see if we have any children at all. If so,
2882 we simply return {...}. */
2883 if (dynamic_varobj_has_child_method (var
))
2885 do_cleanups (old_chain
);
2886 return xstrdup ("{...}");
2889 if (PyObject_HasAttr (value_formatter
, gdbpy_to_string_cst
))
2891 struct value
*replacement
;
2892 PyObject
*output
= NULL
;
2894 output
= apply_varobj_pretty_printer (value_formatter
,
2898 /* If we have string like output ... */
2901 make_cleanup_py_decref (output
);
2903 /* If this is a lazy string, extract it. For lazy
2904 strings we always print as a string, so set
2906 if (gdbpy_is_lazy_string (output
))
2908 gdbpy_extract_lazy_string (output
, &str_addr
, &type
,
2910 make_cleanup (free_current_contents
, &encoding
);
2915 /* If it is a regular (non-lazy) string, extract
2916 it and copy the contents into THEVALUE. If the
2917 hint says to print it as a string, set
2918 string_print. Otherwise just return the extracted
2919 string as a value. */
2921 char *s
= python_string_to_target_string (output
);
2927 hint
= gdbpy_get_display_hint (value_formatter
);
2930 if (!strcmp (hint
, "string"))
2936 thevalue
= xmemdup (s
, len
+ 1, len
+ 1);
2937 type
= builtin_type (gdbarch
)->builtin_char
;
2942 do_cleanups (old_chain
);
2946 make_cleanup (xfree
, thevalue
);
2949 gdbpy_print_stack ();
2952 /* If the printer returned a replacement value, set VALUE
2953 to REPLACEMENT. If there is not a replacement value,
2954 just use the value passed to this function. */
2956 value
= replacement
;
2962 get_formatted_print_options (&opts
, format_code
[(int) format
]);
2966 /* If the THEVALUE has contents, it is a regular string. */
2968 LA_PRINT_STRING (stb
, type
, (gdb_byte
*) thevalue
, len
, encoding
, 0, &opts
);
2969 else if (string_print
)
2970 /* Otherwise, if string_print is set, and it is not a regular
2971 string, it is a lazy string. */
2972 val_print_string (type
, encoding
, str_addr
, len
, stb
, &opts
);
2974 /* All other cases. */
2975 common_val_print (value
, stb
, 0, &opts
, current_language
);
2977 thevalue
= ui_file_xstrdup (stb
, NULL
);
2979 do_cleanups (old_chain
);
2984 varobj_editable_p (struct varobj
*var
)
2988 if (!(var
->root
->is_valid
&& var
->value
&& VALUE_LVAL (var
->value
)))
2991 type
= get_value_type (var
);
2993 switch (TYPE_CODE (type
))
2995 case TYPE_CODE_STRUCT
:
2996 case TYPE_CODE_UNION
:
2997 case TYPE_CODE_ARRAY
:
2998 case TYPE_CODE_FUNC
:
2999 case TYPE_CODE_METHOD
:
3009 /* Call VAR's value_is_changeable_p language-specific callback. */
3012 varobj_value_is_changeable_p (struct varobj
*var
)
3014 return var
->root
->lang
->value_is_changeable_p (var
);
3017 /* Return 1 if that varobj is floating, that is is always evaluated in the
3018 selected frame, and not bound to thread/frame. Such variable objects
3019 are created using '@' as frame specifier to -var-create. */
3021 varobj_floating_p (struct varobj
*var
)
3023 return var
->root
->floating
;
3026 /* Given the value and the type of a variable object,
3027 adjust the value and type to those necessary
3028 for getting children of the variable object.
3029 This includes dereferencing top-level references
3030 to all types and dereferencing pointers to
3033 If LOOKUP_ACTUAL_TYPE is set the enclosing type of the
3034 value will be fetched and if it differs from static type
3035 the value will be casted to it.
3037 Both TYPE and *TYPE should be non-null. VALUE
3038 can be null if we want to only translate type.
3039 *VALUE can be null as well -- if the parent
3042 If WAS_PTR is not NULL, set *WAS_PTR to 0 or 1
3043 depending on whether pointer was dereferenced
3044 in this function. */
3046 adjust_value_for_child_access (struct value
**value
,
3049 int lookup_actual_type
)
3051 gdb_assert (type
&& *type
);
3056 *type
= check_typedef (*type
);
3058 /* The type of value stored in varobj, that is passed
3059 to us, is already supposed to be
3060 reference-stripped. */
3062 gdb_assert (TYPE_CODE (*type
) != TYPE_CODE_REF
);
3064 /* Pointers to structures are treated just like
3065 structures when accessing children. Don't
3066 dererences pointers to other types. */
3067 if (TYPE_CODE (*type
) == TYPE_CODE_PTR
)
3069 struct type
*target_type
= get_target_type (*type
);
3070 if (TYPE_CODE (target_type
) == TYPE_CODE_STRUCT
3071 || TYPE_CODE (target_type
) == TYPE_CODE_UNION
)
3073 if (value
&& *value
)
3075 volatile struct gdb_exception except
;
3077 TRY_CATCH (except
, RETURN_MASK_ERROR
)
3079 *value
= value_ind (*value
);
3082 if (except
.reason
< 0)
3085 *type
= target_type
;
3091 /* The 'get_target_type' function calls check_typedef on
3092 result, so we can immediately check type code. No
3093 need to call check_typedef here. */
3095 /* Access a real type of the value (if necessary and possible). */
3096 if (value
&& *value
&& lookup_actual_type
)
3098 struct type
*enclosing_type
;
3099 int real_type_found
= 0;
3101 enclosing_type
= value_actual_type (*value
, 1, &real_type_found
);
3102 if (real_type_found
)
3104 *type
= enclosing_type
;
3105 *value
= value_cast (enclosing_type
, *value
);
3110 /* Implement the "value_is_changeable_p" varobj callback for most
3114 default_value_is_changeable_p (struct varobj
*var
)
3119 if (CPLUS_FAKE_CHILD (var
))
3122 type
= get_value_type (var
);
3124 switch (TYPE_CODE (type
))
3126 case TYPE_CODE_STRUCT
:
3127 case TYPE_CODE_UNION
:
3128 case TYPE_CODE_ARRAY
:
3142 c_number_of_children (struct varobj
*var
)
3144 struct type
*type
= get_value_type (var
);
3146 struct type
*target
;
3148 adjust_value_for_child_access (NULL
, &type
, NULL
, 0);
3149 target
= get_target_type (type
);
3151 switch (TYPE_CODE (type
))
3153 case TYPE_CODE_ARRAY
:
3154 if (TYPE_LENGTH (type
) > 0 && TYPE_LENGTH (target
) > 0
3155 && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type
))
3156 children
= TYPE_LENGTH (type
) / TYPE_LENGTH (target
);
3158 /* If we don't know how many elements there are, don't display
3163 case TYPE_CODE_STRUCT
:
3164 case TYPE_CODE_UNION
:
3165 children
= TYPE_NFIELDS (type
);
3169 /* The type here is a pointer to non-struct. Typically, pointers
3170 have one child, except for function ptrs, which have no children,
3171 and except for void*, as we don't know what to show.
3173 We can show char* so we allow it to be dereferenced. If you decide
3174 to test for it, please mind that a little magic is necessary to
3175 properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and
3176 TYPE_NAME == "char". */
3177 if (TYPE_CODE (target
) == TYPE_CODE_FUNC
3178 || TYPE_CODE (target
) == TYPE_CODE_VOID
)
3185 /* Other types have no children. */
3193 c_name_of_variable (struct varobj
*parent
)
3195 return xstrdup (parent
->name
);
3198 /* Return the value of element TYPE_INDEX of a structure
3199 value VALUE. VALUE's type should be a structure,
3200 or union, or a typedef to struct/union.
3202 Returns NULL if getting the value fails. Never throws. */
3203 static struct value
*
3204 value_struct_element_index (struct value
*value
, int type_index
)
3206 struct value
*result
= NULL
;
3207 volatile struct gdb_exception e
;
3208 struct type
*type
= value_type (value
);
3210 type
= check_typedef (type
);
3212 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_STRUCT
3213 || TYPE_CODE (type
) == TYPE_CODE_UNION
);
3215 TRY_CATCH (e
, RETURN_MASK_ERROR
)
3217 if (field_is_static (&TYPE_FIELD (type
, type_index
)))
3218 result
= value_static_field (type
, type_index
);
3220 result
= value_primitive_field (value
, 0, type_index
, type
);
3232 /* Obtain the information about child INDEX of the variable
3234 If CNAME is not null, sets *CNAME to the name of the child relative
3236 If CVALUE is not null, sets *CVALUE to the value of the child.
3237 If CTYPE is not null, sets *CTYPE to the type of the child.
3239 If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding
3240 information cannot be determined, set *CNAME, *CVALUE, or *CTYPE
3243 c_describe_child (struct varobj
*parent
, int index
,
3244 char **cname
, struct value
**cvalue
, struct type
**ctype
,
3245 char **cfull_expression
)
3247 struct value
*value
= parent
->value
;
3248 struct type
*type
= get_value_type (parent
);
3249 char *parent_expression
= NULL
;
3251 volatile struct gdb_exception except
;
3259 if (cfull_expression
)
3261 *cfull_expression
= NULL
;
3262 parent_expression
= varobj_get_path_expr (get_path_expr_parent (parent
));
3264 adjust_value_for_child_access (&value
, &type
, &was_ptr
, 0);
3266 switch (TYPE_CODE (type
))
3268 case TYPE_CODE_ARRAY
:
3271 = xstrdup (int_string (index
3272 + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type
)),
3275 if (cvalue
&& value
)
3277 int real_index
= index
+ TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type
));
3279 TRY_CATCH (except
, RETURN_MASK_ERROR
)
3281 *cvalue
= value_subscript (value
, real_index
);
3286 *ctype
= get_target_type (type
);
3288 if (cfull_expression
)
3290 xstrprintf ("(%s)[%s]", parent_expression
,
3292 + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type
)),
3298 case TYPE_CODE_STRUCT
:
3299 case TYPE_CODE_UNION
:
3301 const char *field_name
;
3303 /* If the type is anonymous and the field has no name,
3304 set an appropriate name. */
3305 field_name
= TYPE_FIELD_NAME (type
, index
);
3306 if (field_name
== NULL
|| *field_name
== '\0')
3310 if (TYPE_CODE (TYPE_FIELD_TYPE (type
, index
))
3311 == TYPE_CODE_STRUCT
)
3312 *cname
= xstrdup (ANONYMOUS_STRUCT_NAME
);
3314 *cname
= xstrdup (ANONYMOUS_UNION_NAME
);
3317 if (cfull_expression
)
3318 *cfull_expression
= xstrdup ("");
3323 *cname
= xstrdup (field_name
);
3325 if (cfull_expression
)
3327 char *join
= was_ptr
? "->" : ".";
3329 *cfull_expression
= xstrprintf ("(%s)%s%s", parent_expression
,
3334 if (cvalue
&& value
)
3336 /* For C, varobj index is the same as type index. */
3337 *cvalue
= value_struct_element_index (value
, index
);
3341 *ctype
= TYPE_FIELD_TYPE (type
, index
);
3347 *cname
= xstrprintf ("*%s", parent
->name
);
3349 if (cvalue
&& value
)
3351 TRY_CATCH (except
, RETURN_MASK_ERROR
)
3353 *cvalue
= value_ind (value
);
3356 if (except
.reason
< 0)
3360 /* Don't use get_target_type because it calls
3361 check_typedef and here, we want to show the true
3362 declared type of the variable. */
3364 *ctype
= TYPE_TARGET_TYPE (type
);
3366 if (cfull_expression
)
3367 *cfull_expression
= xstrprintf ("*(%s)", parent_expression
);
3372 /* This should not happen. */
3374 *cname
= xstrdup ("???");
3375 if (cfull_expression
)
3376 *cfull_expression
= xstrdup ("???");
3377 /* Don't set value and type, we don't know then. */
3382 c_name_of_child (struct varobj
*parent
, int index
)
3386 c_describe_child (parent
, index
, &name
, NULL
, NULL
, NULL
);
3391 c_path_expr_of_child (struct varobj
*child
)
3393 c_describe_child (child
->parent
, child
->index
, NULL
, NULL
, NULL
,
3395 return child
->path_expr
;
3398 /* If frame associated with VAR can be found, switch
3399 to it and return 1. Otherwise, return 0. */
3401 check_scope (struct varobj
*var
)
3403 struct frame_info
*fi
;
3406 fi
= frame_find_by_id (var
->root
->frame
);
3411 CORE_ADDR pc
= get_frame_pc (fi
);
3413 if (pc
< BLOCK_START (var
->root
->valid_block
) ||
3414 pc
>= BLOCK_END (var
->root
->valid_block
))
3422 static struct value
*
3423 c_value_of_root (struct varobj
**var_handle
)
3425 struct value
*new_val
= NULL
;
3426 struct varobj
*var
= *var_handle
;
3427 int within_scope
= 0;
3428 struct cleanup
*back_to
;
3430 /* Only root variables can be updated... */
3431 if (!is_root_p (var
))
3432 /* Not a root var. */
3435 back_to
= make_cleanup_restore_current_thread ();
3437 /* Determine whether the variable is still around. */
3438 if (var
->root
->valid_block
== NULL
|| var
->root
->floating
)
3440 else if (var
->root
->thread_id
== 0)
3442 /* The program was single-threaded when the variable object was
3443 created. Technically, it's possible that the program became
3444 multi-threaded since then, but we don't support such
3446 within_scope
= check_scope (var
);
3450 ptid_t ptid
= thread_id_to_pid (var
->root
->thread_id
);
3451 if (in_thread_list (ptid
))
3453 switch_to_thread (ptid
);
3454 within_scope
= check_scope (var
);
3460 volatile struct gdb_exception except
;
3462 /* We need to catch errors here, because if evaluate
3463 expression fails we want to just return NULL. */
3464 TRY_CATCH (except
, RETURN_MASK_ERROR
)
3466 new_val
= evaluate_expression (var
->root
->exp
);
3470 do_cleanups (back_to
);
3475 static struct value
*
3476 c_value_of_child (struct varobj
*parent
, int index
)
3478 struct value
*value
= NULL
;
3480 c_describe_child (parent
, index
, NULL
, &value
, NULL
, NULL
);
3484 static struct type
*
3485 c_type_of_child (struct varobj
*parent
, int index
)
3487 struct type
*type
= NULL
;
3489 c_describe_child (parent
, index
, NULL
, NULL
, &type
, NULL
);
3494 c_value_of_variable (struct varobj
*var
, enum varobj_display_formats format
)
3496 /* BOGUS: if val_print sees a struct/class, or a reference to one,
3497 it will print out its children instead of "{...}". So we need to
3498 catch that case explicitly. */
3499 struct type
*type
= get_type (var
);
3501 /* Strip top-level references. */
3502 while (TYPE_CODE (type
) == TYPE_CODE_REF
)
3503 type
= check_typedef (TYPE_TARGET_TYPE (type
));
3505 switch (TYPE_CODE (type
))
3507 case TYPE_CODE_STRUCT
:
3508 case TYPE_CODE_UNION
:
3509 return xstrdup ("{...}");
3512 case TYPE_CODE_ARRAY
:
3516 number
= xstrprintf ("[%d]", var
->num_children
);
3523 if (var
->value
== NULL
)
3525 /* This can happen if we attempt to get the value of a struct
3526 member when the parent is an invalid pointer. This is an
3527 error condition, so we should tell the caller. */
3532 if (var
->not_fetched
&& value_lazy (var
->value
))
3533 /* Frozen variable and no value yet. We don't
3534 implicitly fetch the value. MI response will
3535 use empty string for the value, which is OK. */
3538 gdb_assert (varobj_value_is_changeable_p (var
));
3539 gdb_assert (!value_lazy (var
->value
));
3541 /* If the specified format is the current one,
3542 we can reuse print_value. */
3543 if (format
== var
->format
)
3544 return xstrdup (var
->print_value
);
3546 return value_get_print_value (var
->value
, format
, var
);
3556 cplus_number_of_children (struct varobj
*var
)
3558 struct value
*value
= NULL
;
3560 int children
, dont_know
;
3561 int lookup_actual_type
= 0;
3562 struct value_print_options opts
;
3567 get_user_print_options (&opts
);
3569 if (!CPLUS_FAKE_CHILD (var
))
3571 type
= get_value_type (var
);
3573 /* It is necessary to access a real type (via RTTI). */
3574 if (opts
.objectprint
)
3577 lookup_actual_type
= (TYPE_CODE (var
->type
) == TYPE_CODE_REF
3578 || TYPE_CODE (var
->type
) == TYPE_CODE_PTR
);
3580 adjust_value_for_child_access (&value
, &type
, NULL
, lookup_actual_type
);
3582 if (((TYPE_CODE (type
)) == TYPE_CODE_STRUCT
) ||
3583 ((TYPE_CODE (type
)) == TYPE_CODE_UNION
))
3587 cplus_class_num_children (type
, kids
);
3588 if (kids
[v_public
] != 0)
3590 if (kids
[v_private
] != 0)
3592 if (kids
[v_protected
] != 0)
3595 /* Add any baseclasses. */
3596 children
+= TYPE_N_BASECLASSES (type
);
3599 /* FIXME: save children in var. */
3606 type
= get_value_type (var
->parent
);
3608 /* It is necessary to access a real type (via RTTI). */
3609 if (opts
.objectprint
)
3611 struct varobj
*parent
= var
->parent
;
3613 value
= parent
->value
;
3614 lookup_actual_type
= (TYPE_CODE (parent
->type
) == TYPE_CODE_REF
3615 || TYPE_CODE (parent
->type
) == TYPE_CODE_PTR
);
3617 adjust_value_for_child_access (&value
, &type
, NULL
, lookup_actual_type
);
3619 cplus_class_num_children (type
, kids
);
3620 if (strcmp (var
->name
, "public") == 0)
3621 children
= kids
[v_public
];
3622 else if (strcmp (var
->name
, "private") == 0)
3623 children
= kids
[v_private
];
3625 children
= kids
[v_protected
];
3630 children
= c_number_of_children (var
);
3635 /* Compute # of public, private, and protected variables in this class.
3636 That means we need to descend into all baseclasses and find out
3637 how many are there, too. */
3639 cplus_class_num_children (struct type
*type
, int children
[3])
3641 int i
, vptr_fieldno
;
3642 struct type
*basetype
= NULL
;
3644 children
[v_public
] = 0;
3645 children
[v_private
] = 0;
3646 children
[v_protected
] = 0;
3648 vptr_fieldno
= get_vptr_fieldno (type
, &basetype
);
3649 for (i
= TYPE_N_BASECLASSES (type
); i
< TYPE_NFIELDS (type
); i
++)
3651 /* If we have a virtual table pointer, omit it. Even if virtual
3652 table pointers are not specifically marked in the debug info,
3653 they should be artificial. */
3654 if ((type
== basetype
&& i
== vptr_fieldno
)
3655 || TYPE_FIELD_ARTIFICIAL (type
, i
))
3658 if (TYPE_FIELD_PROTECTED (type
, i
))
3659 children
[v_protected
]++;
3660 else if (TYPE_FIELD_PRIVATE (type
, i
))
3661 children
[v_private
]++;
3663 children
[v_public
]++;
3668 cplus_name_of_variable (struct varobj
*parent
)
3670 return c_name_of_variable (parent
);
3673 enum accessibility
{ private_field
, protected_field
, public_field
};
3675 /* Check if field INDEX of TYPE has the specified accessibility.
3676 Return 0 if so and 1 otherwise. */
3678 match_accessibility (struct type
*type
, int index
, enum accessibility acc
)
3680 if (acc
== private_field
&& TYPE_FIELD_PRIVATE (type
, index
))
3682 else if (acc
== protected_field
&& TYPE_FIELD_PROTECTED (type
, index
))
3684 else if (acc
== public_field
&& !TYPE_FIELD_PRIVATE (type
, index
)
3685 && !TYPE_FIELD_PROTECTED (type
, index
))
3692 cplus_describe_child (struct varobj
*parent
, int index
,
3693 char **cname
, struct value
**cvalue
, struct type
**ctype
,
3694 char **cfull_expression
)
3696 struct value
*value
;
3699 int lookup_actual_type
= 0;
3700 char *parent_expression
= NULL
;
3702 struct value_print_options opts
;
3710 if (cfull_expression
)
3711 *cfull_expression
= NULL
;
3713 get_user_print_options (&opts
);
3715 var
= (CPLUS_FAKE_CHILD (parent
)) ? parent
->parent
: parent
;
3716 if (opts
.objectprint
)
3717 lookup_actual_type
= (TYPE_CODE (var
->type
) == TYPE_CODE_REF
3718 || TYPE_CODE (var
->type
) == TYPE_CODE_PTR
);
3720 type
= get_value_type (var
);
3721 if (cfull_expression
)
3722 parent_expression
= varobj_get_path_expr (get_path_expr_parent (var
));
3724 adjust_value_for_child_access (&value
, &type
, &was_ptr
, lookup_actual_type
);
3726 if (TYPE_CODE (type
) == TYPE_CODE_STRUCT
3727 || TYPE_CODE (type
) == TYPE_CODE_UNION
)
3729 char *join
= was_ptr
? "->" : ".";
3731 if (CPLUS_FAKE_CHILD (parent
))
3733 /* The fields of the class type are ordered as they
3734 appear in the class. We are given an index for a
3735 particular access control type ("public","protected",
3736 or "private"). We must skip over fields that don't
3737 have the access control we are looking for to properly
3738 find the indexed field. */
3739 int type_index
= TYPE_N_BASECLASSES (type
);
3740 enum accessibility acc
= public_field
;
3742 struct type
*basetype
= NULL
;
3743 const char *field_name
;
3745 vptr_fieldno
= get_vptr_fieldno (type
, &basetype
);
3746 if (strcmp (parent
->name
, "private") == 0)
3747 acc
= private_field
;
3748 else if (strcmp (parent
->name
, "protected") == 0)
3749 acc
= protected_field
;
3753 if ((type
== basetype
&& type_index
== vptr_fieldno
)
3754 || TYPE_FIELD_ARTIFICIAL (type
, type_index
))
3756 else if (match_accessibility (type
, type_index
, acc
))
3762 /* If the type is anonymous and the field has no name,
3763 set an appopriate name. */
3764 field_name
= TYPE_FIELD_NAME (type
, type_index
);
3765 if (field_name
== NULL
|| *field_name
== '\0')
3769 if (TYPE_CODE (TYPE_FIELD_TYPE (type
, type_index
))
3770 == TYPE_CODE_STRUCT
)
3771 *cname
= xstrdup (ANONYMOUS_STRUCT_NAME
);
3772 else if (TYPE_CODE (TYPE_FIELD_TYPE (type
, type_index
))
3774 *cname
= xstrdup (ANONYMOUS_UNION_NAME
);
3777 if (cfull_expression
)
3778 *cfull_expression
= xstrdup ("");
3783 *cname
= xstrdup (TYPE_FIELD_NAME (type
, type_index
));
3785 if (cfull_expression
)
3787 = xstrprintf ("((%s)%s%s)", parent_expression
, join
,
3791 if (cvalue
&& value
)
3792 *cvalue
= value_struct_element_index (value
, type_index
);
3795 *ctype
= TYPE_FIELD_TYPE (type
, type_index
);
3797 else if (index
< TYPE_N_BASECLASSES (type
))
3799 /* This is a baseclass. */
3801 *cname
= xstrdup (TYPE_FIELD_NAME (type
, index
));
3803 if (cvalue
&& value
)
3804 *cvalue
= value_cast (TYPE_FIELD_TYPE (type
, index
), value
);
3808 *ctype
= TYPE_FIELD_TYPE (type
, index
);
3811 if (cfull_expression
)
3813 char *ptr
= was_ptr
? "*" : "";
3815 /* Cast the parent to the base' type. Note that in gdb,
3818 will create an lvalue, for all appearences, so we don't
3819 need to use more fancy:
3823 When we are in the scope of the base class or of one
3824 of its children, the type field name will be interpreted
3825 as a constructor, if it exists. Therefore, we must
3826 indicate that the name is a class name by using the
3827 'class' keyword. See PR mi/11912 */
3828 *cfull_expression
= xstrprintf ("(%s(class %s%s) %s)",
3830 TYPE_FIELD_NAME (type
, index
),
3837 char *access
= NULL
;
3840 cplus_class_num_children (type
, children
);
3842 /* Everything beyond the baseclasses can
3843 only be "public", "private", or "protected"
3845 The special "fake" children are always output by varobj in
3846 this order. So if INDEX == 2, it MUST be "protected". */
3847 index
-= TYPE_N_BASECLASSES (type
);
3851 if (children
[v_public
] > 0)
3853 else if (children
[v_private
] > 0)
3856 access
= "protected";
3859 if (children
[v_public
] > 0)
3861 if (children
[v_private
] > 0)
3864 access
= "protected";
3866 else if (children
[v_private
] > 0)
3867 access
= "protected";
3870 /* Must be protected. */
3871 access
= "protected";
3878 gdb_assert (access
);
3880 *cname
= xstrdup (access
);
3882 /* Value and type and full expression are null here. */
3887 c_describe_child (parent
, index
, cname
, cvalue
, ctype
, cfull_expression
);
3892 cplus_name_of_child (struct varobj
*parent
, int index
)
3896 cplus_describe_child (parent
, index
, &name
, NULL
, NULL
, NULL
);
3901 cplus_path_expr_of_child (struct varobj
*child
)
3903 cplus_describe_child (child
->parent
, child
->index
, NULL
, NULL
, NULL
,
3905 return child
->path_expr
;
3908 static struct value
*
3909 cplus_value_of_root (struct varobj
**var_handle
)
3911 return c_value_of_root (var_handle
);
3914 static struct value
*
3915 cplus_value_of_child (struct varobj
*parent
, int index
)
3917 struct value
*value
= NULL
;
3919 cplus_describe_child (parent
, index
, NULL
, &value
, NULL
, NULL
);
3923 static struct type
*
3924 cplus_type_of_child (struct varobj
*parent
, int index
)
3926 struct type
*type
= NULL
;
3928 cplus_describe_child (parent
, index
, NULL
, NULL
, &type
, NULL
);
3933 cplus_value_of_variable (struct varobj
*var
,
3934 enum varobj_display_formats format
)
3937 /* If we have one of our special types, don't print out
3939 if (CPLUS_FAKE_CHILD (var
))
3940 return xstrdup ("");
3942 return c_value_of_variable (var
, format
);
3948 java_number_of_children (struct varobj
*var
)
3950 return cplus_number_of_children (var
);
3954 java_name_of_variable (struct varobj
*parent
)
3958 name
= cplus_name_of_variable (parent
);
3959 /* If the name has "-" in it, it is because we
3960 needed to escape periods in the name... */
3963 while (*p
!= '\000')
3974 java_name_of_child (struct varobj
*parent
, int index
)
3978 name
= cplus_name_of_child (parent
, index
);
3979 /* Escape any periods in the name... */
3982 while (*p
!= '\000')
3993 java_path_expr_of_child (struct varobj
*child
)
3998 static struct value
*
3999 java_value_of_root (struct varobj
**var_handle
)
4001 return cplus_value_of_root (var_handle
);
4004 static struct value
*
4005 java_value_of_child (struct varobj
*parent
, int index
)
4007 return cplus_value_of_child (parent
, index
);
4010 static struct type
*
4011 java_type_of_child (struct varobj
*parent
, int index
)
4013 return cplus_type_of_child (parent
, index
);
4017 java_value_of_variable (struct varobj
*var
, enum varobj_display_formats format
)
4019 return cplus_value_of_variable (var
, format
);
4022 /* Ada specific callbacks for VAROBJs. */
4025 ada_number_of_children (struct varobj
*var
)
4027 return ada_varobj_get_number_of_children (var
->value
, var
->type
);
4031 ada_name_of_variable (struct varobj
*parent
)
4033 return c_name_of_variable (parent
);
4037 ada_name_of_child (struct varobj
*parent
, int index
)
4039 return ada_varobj_get_name_of_child (parent
->value
, parent
->type
,
4040 parent
->name
, index
);
4044 ada_path_expr_of_child (struct varobj
*child
)
4046 struct varobj
*parent
= child
->parent
;
4047 const char *parent_path_expr
= varobj_get_path_expr (parent
);
4049 return ada_varobj_get_path_expr_of_child (parent
->value
,
4056 static struct value
*
4057 ada_value_of_root (struct varobj
**var_handle
)
4059 return c_value_of_root (var_handle
);
4062 static struct value
*
4063 ada_value_of_child (struct varobj
*parent
, int index
)
4065 return ada_varobj_get_value_of_child (parent
->value
, parent
->type
,
4066 parent
->name
, index
);
4069 static struct type
*
4070 ada_type_of_child (struct varobj
*parent
, int index
)
4072 return ada_varobj_get_type_of_child (parent
->value
, parent
->type
,
4077 ada_value_of_variable (struct varobj
*var
, enum varobj_display_formats format
)
4079 struct value_print_options opts
;
4081 get_formatted_print_options (&opts
, format_code
[(int) format
]);
4085 return ada_varobj_get_value_of_variable (var
->value
, var
->type
, &opts
);
4088 /* Implement the "value_is_changeable_p" routine for Ada. */
4091 ada_value_is_changeable_p (struct varobj
*var
)
4093 struct type
*type
= var
->value
? value_type (var
->value
) : var
->type
;
4095 if (ada_is_array_descriptor_type (type
)
4096 && TYPE_CODE (type
) == TYPE_CODE_TYPEDEF
)
4098 /* This is in reality a pointer to an unconstrained array.
4099 its value is changeable. */
4103 if (ada_is_string_type (type
))
4105 /* We display the contents of the string in the array's
4106 "value" field. The contents can change, so consider
4107 that the array is changeable. */
4111 return default_value_is_changeable_p (var
);
4114 /* Implement the "value_has_mutated" routine for Ada. */
4117 ada_value_has_mutated (struct varobj
*var
, struct value
*new_val
,
4118 struct type
*new_type
)
4124 /* If the number of fields have changed, then for sure the type
4126 if (ada_varobj_get_number_of_children (new_val
, new_type
)
4127 != var
->num_children
)
4130 /* If the number of fields have remained the same, then we need
4131 to check the name of each field. If they remain the same,
4132 then chances are the type hasn't mutated. This is technically
4133 an incomplete test, as the child's type might have changed
4134 despite the fact that the name remains the same. But we'll
4135 handle this situation by saying that the child has mutated,
4138 If only part (or none!) of the children have been fetched,
4139 then only check the ones we fetched. It does not matter
4140 to the frontend whether a child that it has not fetched yet
4141 has mutated or not. So just assume it hasn't. */
4143 restrict_range (var
->children
, &from
, &to
);
4144 for (i
= from
; i
< to
; i
++)
4145 if (strcmp (ada_varobj_get_name_of_child (new_val
, new_type
,
4147 VEC_index (varobj_p
, var
->children
, i
)->name
) != 0)
4153 /* Iterate all the existing _root_ VAROBJs and call the FUNC callback for them
4154 with an arbitrary caller supplied DATA pointer. */
4157 all_root_varobjs (void (*func
) (struct varobj
*var
, void *data
), void *data
)
4159 struct varobj_root
*var_root
, *var_root_next
;
4161 /* Iterate "safely" - handle if the callee deletes its passed VAROBJ. */
4163 for (var_root
= rootlist
; var_root
!= NULL
; var_root
= var_root_next
)
4165 var_root_next
= var_root
->next
;
4167 (*func
) (var_root
->rootvar
, data
);
4171 extern void _initialize_varobj (void);
4173 _initialize_varobj (void)
4175 int sizeof_table
= sizeof (struct vlist
*) * VAROBJ_TABLE_SIZE
;
4177 varobj_table
= xmalloc (sizeof_table
);
4178 memset (varobj_table
, 0, sizeof_table
);
4180 add_setshow_zuinteger_cmd ("debugvarobj", class_maintenance
,
4182 _("Set varobj debugging."),
4183 _("Show varobj debugging."),
4184 _("When non-zero, varobj debugging is enabled."),
4185 NULL
, show_varobjdebug
,
4186 &setlist
, &showlist
);
4189 /* Invalidate varobj VAR if it is tied to locals and re-create it if it is
4190 defined on globals. It is a helper for varobj_invalidate.
4192 This function is called after changing the symbol file, in this case the
4193 pointers to "struct type" stored by the varobj are no longer valid. All
4194 varobj must be either re-evaluated, or marked as invalid here. */
4197 varobj_invalidate_iter (struct varobj
*var
, void *unused
)
4199 /* global and floating var must be re-evaluated. */
4200 if (var
->root
->floating
|| var
->root
->valid_block
== NULL
)
4202 struct varobj
*tmp_var
;
4204 /* Try to create a varobj with same expression. If we succeed
4205 replace the old varobj, otherwise invalidate it. */
4206 tmp_var
= varobj_create (NULL
, var
->name
, (CORE_ADDR
) 0,
4208 if (tmp_var
!= NULL
)
4210 tmp_var
->obj_name
= xstrdup (var
->obj_name
);
4211 varobj_delete (var
, NULL
, 0);
4212 install_variable (tmp_var
);
4215 var
->root
->is_valid
= 0;
4217 else /* locals must be invalidated. */
4218 var
->root
->is_valid
= 0;
4221 /* Invalidate the varobjs that are tied to locals and re-create the ones that
4222 are defined on globals.
4223 Invalidated varobjs will be always printed in_scope="invalid". */
4226 varobj_invalidate (void)
4228 all_root_varobjs (varobj_invalidate_iter
, NULL
);