1 /* Implementation of the GDB variable objects API.
3 Copyright (C) 1999-2012 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
402 /* The language of this variable. */
403 enum varobj_languages language;
405 /* The number of children of PARENT. */
406 int (*number_of_children) (struct varobj * parent);
408 /* The name (expression) of a root varobj. */
409 char *(*name_of_variable) (struct varobj * parent);
411 /* The name of the INDEX'th child of PARENT. */
412 char *(*name_of_child) (struct varobj * parent, int index);
414 /* Returns the rooted expression of CHILD, which is a variable
415 obtain that has some parent. */
416 char *(*path_expr_of_child) (struct varobj * child);
418 /* The ``struct value *'' of the root variable ROOT. */
419 struct value *(*value_of_root) (struct varobj ** root_handle);
421 /* The ``struct value *'' of the INDEX'th child of PARENT. */
422 struct value *(*value_of_child) (struct varobj * parent, int index);
424 /* The type of the INDEX'th child of PARENT. */
425 struct type *(*type_of_child) (struct varobj * parent, int index);
427 /* The current value of VAR. */
428 char *(*value_of_variable) (struct varobj * var,
429 enum varobj_display_formats format);
431 /* Return non-zero if changes in value of VAR must be detected and
432 reported by -var-update. Return zero if -var-update should never
433 report changes of such values. This makes sense for structures
434 (since the changes in children values will be reported separately),
435 or for artifical objects (like 'public' pseudo-field in C++).
437 Return value of 0 means that gdb need not call value_fetch_lazy
438 for the value of this variable object. */
439 int (*value_is_changeable_p) (struct varobj *var);
441 /* Return nonzero if the type of VAR has mutated.
443 VAR's value is still the varobj's previous value, while NEW_VALUE
444 is VAR's new value and NEW_TYPE is the var's new type. NEW_VALUE
445 may be NULL indicating that there is no value available (the varobj
446 may be out of scope, of may be the child of a null pointer, for
447 instance). NEW_TYPE, on the other hand, must never be NULL.
449 This function should also be able to assume that var's number of
450 children is set (not < 0).
452 Languages where types do not mutate can set this to NULL. */
453 int (*value_has_mutated) (struct varobj *var, struct value *new_value,
454 struct type *new_type);
457 /* Array of known source language routines. */
458 static struct language_specific languages[vlang_end] = {
459 /* Unknown (try treating as C). */
462 c_number_of_children,
465 c_path_expr_of_child,
470 default_value_is_changeable_p,
471 NULL /* value_has_mutated */}
476 c_number_of_children,
479 c_path_expr_of_child,
484 default_value_is_changeable_p,
485 NULL /* value_has_mutated */}
490 cplus_number_of_children,
491 cplus_name_of_variable,
493 cplus_path_expr_of_child,
495 cplus_value_of_child,
497 cplus_value_of_variable,
498 default_value_is_changeable_p,
499 NULL /* value_has_mutated */}
504 java_number_of_children,
505 java_name_of_variable,
507 java_path_expr_of_child,
511 java_value_of_variable,
512 default_value_is_changeable_p,
513 NULL /* value_has_mutated */},
517 ada_number_of_children,
518 ada_name_of_variable,
520 ada_path_expr_of_child,
524 ada_value_of_variable,
525 ada_value_is_changeable_p,
526 ada_value_has_mutated}
529 /* A little convenience enum for dealing with C++/Java. */
532 v_public = 0, v_private, v_protected
537 /* Mappings of varobj_display_formats enums to gdb's format codes. */
538 static int format_code[] = { 0, 't', 'd', 'x', 'o' };
540 /* Header of the list of root variable objects. */
541 static struct varobj_root *rootlist;
543 /* Prime number indicating the number of buckets in the hash table. */
544 /* A prime large enough to avoid too many colisions. */
545 #define VAROBJ_TABLE_SIZE 227
547 /* Pointer to the varobj hash table (built at run time). */
548 static struct vlist **varobj_table;
550 /* Is the variable X one of our "fake" children? */
551 #define CPLUS_FAKE_CHILD(x) \
552 ((x) != NULL && (x)->type == NULL && (x)->value == NULL)
555 /* API Implementation */
557 is_root_p (struct varobj *var)
559 return (var->root->rootvar == var);
563 /* Helper function to install a Python environment suitable for
564 use during operations on VAR. */
565 static struct cleanup *
566 varobj_ensure_python_env (struct varobj *var)
568 return ensure_python_env (var->root->exp->gdbarch,
569 var->root->exp->language_defn);
573 /* Creates a varobj (not its children). */
575 /* Return the full FRAME which corresponds to the given CORE_ADDR
576 or NULL if no FRAME on the chain corresponds to CORE_ADDR. */
578 static struct frame_info *
579 find_frame_addr_in_frame_chain (CORE_ADDR frame_addr)
581 struct frame_info *frame = NULL;
583 if (frame_addr == (CORE_ADDR) 0)
586 for (frame = get_current_frame ();
588 frame = get_prev_frame (frame))
590 /* The CORE_ADDR we get as argument was parsed from a string GDB
591 output as $fp. This output got truncated to gdbarch_addr_bit.
592 Truncate the frame base address in the same manner before
593 comparing it against our argument. */
594 CORE_ADDR frame_base = get_frame_base_address (frame);
595 int addr_bit = gdbarch_addr_bit (get_frame_arch (frame));
597 if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))
598 frame_base &= ((CORE_ADDR) 1 << addr_bit) - 1;
600 if (frame_base == frame_addr)
608 varobj_create (char *objname,
609 char *expression, CORE_ADDR frame, enum varobj_type type)
612 struct cleanup *old_chain;
614 /* Fill out a varobj structure for the (root) variable being constructed. */
615 var = new_root_variable ();
616 old_chain = make_cleanup_free_variable (var);
618 if (expression != NULL)
620 struct frame_info *fi;
621 struct frame_id old_id = null_frame_id;
624 enum varobj_languages lang;
625 struct value *value = NULL;
626 volatile struct gdb_exception except;
629 /* Parse and evaluate the expression, filling in as much of the
630 variable's data as possible. */
632 if (has_stack_frames ())
634 /* Allow creator to specify context of variable. */
635 if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME))
636 fi = get_selected_frame (NULL);
638 /* FIXME: cagney/2002-11-23: This code should be doing a
639 lookup using the frame ID and not just the frame's
640 ``address''. This, of course, means an interface
641 change. However, with out that interface change ISAs,
642 such as the ia64 with its two stacks, won't work.
643 Similar goes for the case where there is a frameless
645 fi = find_frame_addr_in_frame_chain (frame);
650 /* frame = -2 means always use selected frame. */
651 if (type == USE_SELECTED_FRAME)
652 var->root->floating = 1;
658 block = get_frame_block (fi, 0);
659 pc = get_frame_pc (fi);
663 innermost_block = NULL;
664 /* Wrap the call to parse expression, so we can
665 return a sensible error. */
666 TRY_CATCH (except, RETURN_MASK_ERROR)
668 var->root->exp = parse_exp_1 (&p, pc, block, 0);
671 if (except.reason < 0)
673 do_cleanups (old_chain);
677 /* Don't allow variables to be created for types. */
678 if (var->root->exp->elts[0].opcode == OP_TYPE
679 || var->root->exp->elts[0].opcode == OP_TYPEOF
680 || var->root->exp->elts[0].opcode == OP_DECLTYPE)
682 do_cleanups (old_chain);
683 fprintf_unfiltered (gdb_stderr, "Attempt to use a type name"
684 " as an expression.\n");
688 var->format = variable_default_display (var);
689 var->root->valid_block = innermost_block;
690 var->name = xstrdup (expression);
691 /* For a root var, the name and the expr are the same. */
692 var->path_expr = xstrdup (expression);
694 /* When the frame is different from the current frame,
695 we must select the appropriate frame before parsing
696 the expression, otherwise the value will not be current.
697 Since select_frame is so benign, just call it for all cases. */
700 /* User could specify explicit FRAME-ADDR which was not found but
701 EXPRESSION is frame specific and we would not be able to evaluate
702 it correctly next time. With VALID_BLOCK set we must also set
703 FRAME and THREAD_ID. */
705 error (_("Failed to find the specified frame"));
707 var->root->frame = get_frame_id (fi);
708 var->root->thread_id = pid_to_thread_id (inferior_ptid);
709 old_id = get_frame_id (get_selected_frame (NULL));
713 /* We definitely need to catch errors here.
714 If evaluate_expression succeeds we got the value we wanted.
715 But if it fails, we still go on with a call to evaluate_type(). */
716 TRY_CATCH (except, RETURN_MASK_ERROR)
718 value = evaluate_expression (var->root->exp);
721 if (except.reason < 0)
723 /* Error getting the value. Try to at least get the
725 struct value *type_only_value = evaluate_type (var->root->exp);
727 var->type = value_type (type_only_value);
731 int real_type_found = 0;
733 var->type = value_actual_type (value, 0, &real_type_found);
735 value = value_cast (var->type, value);
738 /* Set language info */
739 lang = variable_language (var);
740 var->root->lang = &languages[lang];
742 install_new_value (var, value, 1 /* Initial assignment */);
744 /* Set ourselves as our root. */
745 var->root->rootvar = var;
747 /* Reset the selected frame. */
748 if (frame_id_p (old_id))
749 select_frame (frame_find_by_id (old_id));
752 /* If the variable object name is null, that means this
753 is a temporary variable, so don't install it. */
755 if ((var != NULL) && (objname != NULL))
757 var->obj_name = xstrdup (objname);
759 /* If a varobj name is duplicated, the install will fail so
761 if (!install_variable (var))
763 do_cleanups (old_chain);
768 discard_cleanups (old_chain);
772 /* Generates an unique name that can be used for a varobj. */
775 varobj_gen_name (void)
780 /* Generate a name for this object. */
782 obj_name = xstrprintf ("var%d", id);
787 /* Given an OBJNAME, returns the pointer to the corresponding varobj. Call
788 error if OBJNAME cannot be found. */
791 varobj_get_handle (char *objname)
795 unsigned int index = 0;
798 for (chp = objname; *chp; chp++)
800 index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE;
803 cv = *(varobj_table + index);
804 while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0))
808 error (_("Variable object not found"));
813 /* Given the handle, return the name of the object. */
816 varobj_get_objname (struct varobj *var)
818 return var->obj_name;
821 /* Given the handle, return the expression represented by the object. */
824 varobj_get_expression (struct varobj *var)
826 return name_of_variable (var);
829 /* Deletes a varobj and all its children if only_children == 0,
830 otherwise deletes only the children; returns a malloc'ed list of
831 all the (malloc'ed) names of the variables that have been deleted
832 (NULL terminated). */
835 varobj_delete (struct varobj *var, char ***dellist, int only_children)
839 struct cpstack *result = NULL;
842 /* Initialize a stack for temporary results. */
843 cppush (&result, NULL);
846 /* Delete only the variable children. */
847 delcount = delete_variable (&result, var, 1 /* only the children */ );
849 /* Delete the variable and all its children. */
850 delcount = delete_variable (&result, var, 0 /* parent+children */ );
852 /* We may have been asked to return a list of what has been deleted. */
855 *dellist = xmalloc ((delcount + 1) * sizeof (char *));
859 *cp = cppop (&result);
860 while ((*cp != NULL) && (mycount > 0))
864 *cp = cppop (&result);
867 if (mycount || (*cp != NULL))
868 warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"),
877 /* Convenience function for varobj_set_visualizer. Instantiate a
878 pretty-printer for a given value. */
880 instantiate_pretty_printer (PyObject *constructor, struct value *value)
882 PyObject *val_obj = NULL;
885 val_obj = value_to_value_object (value);
889 printer = PyObject_CallFunctionObjArgs (constructor, val_obj, NULL);
896 /* Set/Get variable object display format. */
898 enum varobj_display_formats
899 varobj_set_display_format (struct varobj *var,
900 enum varobj_display_formats format)
907 case FORMAT_HEXADECIMAL:
909 var->format = format;
913 var->format = variable_default_display (var);
916 if (varobj_value_is_changeable_p (var)
917 && var->value && !value_lazy (var->value))
919 xfree (var->print_value);
920 var->print_value = value_get_print_value (var->value, var->format, var);
926 enum varobj_display_formats
927 varobj_get_display_format (struct varobj *var)
933 varobj_get_display_hint (struct varobj *var)
938 struct cleanup *back_to = varobj_ensure_python_env (var);
940 if (var->pretty_printer)
941 result = gdbpy_get_display_hint (var->pretty_printer);
943 do_cleanups (back_to);
949 /* Return true if the varobj has items after TO, false otherwise. */
952 varobj_has_more (struct varobj *var, int to)
954 if (VEC_length (varobj_p, var->children) > to)
956 return ((to == -1 || VEC_length (varobj_p, var->children) == to)
957 && var->saved_item != NULL);
960 /* If the variable object is bound to a specific thread, that
961 is its evaluation can always be done in context of a frame
962 inside that thread, returns GDB id of the thread -- which
963 is always positive. Otherwise, returns -1. */
965 varobj_get_thread_id (struct varobj *var)
967 if (var->root->valid_block && var->root->thread_id > 0)
968 return var->root->thread_id;
974 varobj_set_frozen (struct varobj *var, int frozen)
976 /* When a variable is unfrozen, we don't fetch its value.
977 The 'not_fetched' flag remains set, so next -var-update
980 We don't fetch the value, because for structures the client
981 should do -var-update anyway. It would be bad to have different
982 client-size logic for structure and other types. */
983 var->frozen = frozen;
987 varobj_get_frozen (struct varobj *var)
992 /* A helper function that restricts a range to what is actually
993 available in a VEC. This follows the usual rules for the meaning
994 of FROM and TO -- if either is negative, the entire range is
998 restrict_range (VEC (varobj_p) *children, int *from, int *to)
1000 if (*from < 0 || *to < 0)
1003 *to = VEC_length (varobj_p, children);
1007 if (*from > VEC_length (varobj_p, children))
1008 *from = VEC_length (varobj_p, children);
1009 if (*to > VEC_length (varobj_p, children))
1010 *to = VEC_length (varobj_p, children);
1018 /* A helper for update_dynamic_varobj_children that installs a new
1019 child when needed. */
1022 install_dynamic_child (struct varobj *var,
1023 VEC (varobj_p) **changed,
1024 VEC (varobj_p) **type_changed,
1025 VEC (varobj_p) **new,
1026 VEC (varobj_p) **unchanged,
1030 struct value *value)
1032 if (VEC_length (varobj_p, var->children) < index + 1)
1034 /* There's no child yet. */
1035 struct varobj *child = varobj_add_child (var, name, value);
1039 VEC_safe_push (varobj_p, *new, child);
1045 varobj_p existing = VEC_index (varobj_p, var->children, index);
1047 int type_updated = update_type_if_necessary (existing, value);
1051 VEC_safe_push (varobj_p, *type_changed, existing);
1053 if (install_new_value (existing, value, 0))
1055 if (!type_updated && changed)
1056 VEC_safe_push (varobj_p, *changed, existing);
1058 else if (!type_updated && unchanged)
1059 VEC_safe_push (varobj_p, *unchanged, existing);
1064 dynamic_varobj_has_child_method (struct varobj *var)
1066 struct cleanup *back_to;
1067 PyObject *printer = var->pretty_printer;
1070 back_to = varobj_ensure_python_env (var);
1071 result = PyObject_HasAttr (printer, gdbpy_children_cst);
1072 do_cleanups (back_to);
1079 update_dynamic_varobj_children (struct varobj *var,
1080 VEC (varobj_p) **changed,
1081 VEC (varobj_p) **type_changed,
1082 VEC (varobj_p) **new,
1083 VEC (varobj_p) **unchanged,
1085 int update_children,
1090 struct cleanup *back_to;
1093 PyObject *printer = var->pretty_printer;
1095 back_to = varobj_ensure_python_env (var);
1098 if (!PyObject_HasAttr (printer, gdbpy_children_cst))
1100 do_cleanups (back_to);
1104 if (update_children || !var->child_iter)
1106 children = PyObject_CallMethodObjArgs (printer, gdbpy_children_cst,
1111 gdbpy_print_stack ();
1112 error (_("Null value returned for children"));
1115 make_cleanup_py_decref (children);
1117 Py_XDECREF (var->child_iter);
1118 var->child_iter = PyObject_GetIter (children);
1119 if (!var->child_iter)
1121 gdbpy_print_stack ();
1122 error (_("Could not get children iterator"));
1125 Py_XDECREF (var->saved_item);
1126 var->saved_item = NULL;
1131 i = VEC_length (varobj_p, var->children);
1133 /* We ask for one extra child, so that MI can report whether there
1134 are more children. */
1135 for (; to < 0 || i < to + 1; ++i)
1140 /* See if there was a leftover from last time. */
1141 if (var->saved_item)
1143 item = var->saved_item;
1144 var->saved_item = NULL;
1147 item = PyIter_Next (var->child_iter);
1151 /* Normal end of iteration. */
1152 if (!PyErr_Occurred ())
1155 /* If we got a memory error, just use the text as the
1157 if (PyErr_ExceptionMatches (gdbpy_gdb_memory_error))
1159 PyObject *type, *value, *trace;
1160 char *name_str, *value_str;
1162 PyErr_Fetch (&type, &value, &trace);
1163 value_str = gdbpy_exception_to_string (type, value);
1169 gdbpy_print_stack ();
1173 name_str = xstrprintf ("<error at %d>", i);
1174 item = Py_BuildValue ("(ss)", name_str, value_str);
1179 gdbpy_print_stack ();
1187 /* Any other kind of error. */
1188 gdbpy_print_stack ();
1193 /* We don't want to push the extra child on any report list. */
1194 if (to < 0 || i < to)
1199 struct cleanup *inner;
1200 int can_mention = from < 0 || i >= from;
1202 inner = make_cleanup_py_decref (item);
1204 if (!PyArg_ParseTuple (item, "sO", &name, &py_v))
1206 gdbpy_print_stack ();
1207 error (_("Invalid item from the child list"));
1210 v = convert_value_from_python (py_v);
1212 gdbpy_print_stack ();
1213 install_dynamic_child (var, can_mention ? changed : NULL,
1214 can_mention ? type_changed : NULL,
1215 can_mention ? new : NULL,
1216 can_mention ? unchanged : NULL,
1217 can_mention ? cchanged : NULL, i, name, v);
1218 do_cleanups (inner);
1222 Py_XDECREF (var->saved_item);
1223 var->saved_item = item;
1225 /* We want to truncate the child list just before this
1234 if (i < VEC_length (varobj_p, var->children))
1239 for (j = i; j < VEC_length (varobj_p, var->children); ++j)
1240 varobj_delete (VEC_index (varobj_p, var->children, j), NULL, 0);
1241 VEC_truncate (varobj_p, var->children, i);
1244 /* If there are fewer children than requested, note that the list of
1245 children changed. */
1246 if (to >= 0 && VEC_length (varobj_p, var->children) < to)
1249 var->num_children = VEC_length (varobj_p, var->children);
1251 do_cleanups (back_to);
1255 gdb_assert (0 && "should never be called if Python is not enabled");
1260 varobj_get_num_children (struct varobj *var)
1262 if (var->num_children == -1)
1264 if (var->pretty_printer)
1268 /* If we have a dynamic varobj, don't report -1 children.
1269 So, try to fetch some children first. */
1270 update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, &dummy,
1274 var->num_children = number_of_children (var);
1277 return var->num_children >= 0 ? var->num_children : 0;
1280 /* Creates a list of the immediate children of a variable object;
1281 the return code is the number of such children or -1 on error. */
1284 varobj_list_children (struct varobj *var, int *from, int *to)
1287 int i, children_changed;
1289 var->children_requested = 1;
1291 if (var->pretty_printer)
1293 /* This, in theory, can result in the number of children changing without
1294 frontend noticing. But well, calling -var-list-children on the same
1295 varobj twice is not something a sane frontend would do. */
1296 update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL,
1297 &children_changed, 0, 0, *to);
1298 restrict_range (var->children, from, to);
1299 return var->children;
1302 if (var->num_children == -1)
1303 var->num_children = number_of_children (var);
1305 /* If that failed, give up. */
1306 if (var->num_children == -1)
1307 return var->children;
1309 /* If we're called when the list of children is not yet initialized,
1310 allocate enough elements in it. */
1311 while (VEC_length (varobj_p, var->children) < var->num_children)
1312 VEC_safe_push (varobj_p, var->children, NULL);
1314 for (i = 0; i < var->num_children; i++)
1316 varobj_p existing = VEC_index (varobj_p, var->children, i);
1318 if (existing == NULL)
1320 /* Either it's the first call to varobj_list_children for
1321 this variable object, and the child was never created,
1322 or it was explicitly deleted by the client. */
1323 name = name_of_child (var, i);
1324 existing = create_child (var, i, name);
1325 VEC_replace (varobj_p, var->children, i, existing);
1329 restrict_range (var->children, from, to);
1330 return var->children;
1335 static struct varobj *
1336 varobj_add_child (struct varobj *var, const char *name, struct value *value)
1338 varobj_p v = create_child_with_value (var,
1339 VEC_length (varobj_p, var->children),
1342 VEC_safe_push (varobj_p, var->children, v);
1346 #endif /* HAVE_PYTHON */
1348 /* Obtain the type of an object Variable as a string similar to the one gdb
1349 prints on the console. */
1352 varobj_get_type (struct varobj *var)
1354 /* For the "fake" variables, do not return a type. (It's type is
1356 Do not return a type for invalid variables as well. */
1357 if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid)
1360 return type_to_string (var->type);
1363 /* Obtain the type of an object variable. */
1366 varobj_get_gdb_type (struct varobj *var)
1371 /* Is VAR a path expression parent, i.e., can it be used to construct
1372 a valid path expression? */
1375 is_path_expr_parent (struct varobj *var)
1379 /* "Fake" children are not path_expr parents. */
1380 if (CPLUS_FAKE_CHILD (var))
1383 type = get_value_type (var);
1385 /* Anonymous unions and structs are also not path_expr parents. */
1386 return !((TYPE_CODE (type) == TYPE_CODE_STRUCT
1387 || TYPE_CODE (type) == TYPE_CODE_UNION)
1388 && TYPE_NAME (type) == NULL);
1391 /* Return the path expression parent for VAR. */
1393 static struct varobj *
1394 get_path_expr_parent (struct varobj *var)
1396 struct varobj *parent = var;
1398 while (!is_root_p (parent) && !is_path_expr_parent (parent))
1399 parent = parent->parent;
1404 /* Return a pointer to the full rooted expression of varobj VAR.
1405 If it has not been computed yet, compute it. */
1407 varobj_get_path_expr (struct varobj *var)
1409 if (var->path_expr != NULL)
1410 return var->path_expr;
1413 /* For root varobjs, we initialize path_expr
1414 when creating varobj, so here it should be
1416 gdb_assert (!is_root_p (var));
1417 return (*var->root->lang->path_expr_of_child) (var);
1421 enum varobj_languages
1422 varobj_get_language (struct varobj *var)
1424 return variable_language (var);
1428 varobj_get_attributes (struct varobj *var)
1432 if (varobj_editable_p (var))
1433 /* FIXME: define masks for attributes. */
1434 attributes |= 0x00000001; /* Editable */
1440 varobj_pretty_printed_p (struct varobj *var)
1442 return var->pretty_printer != NULL;
1446 varobj_get_formatted_value (struct varobj *var,
1447 enum varobj_display_formats format)
1449 return my_value_of_variable (var, format);
1453 varobj_get_value (struct varobj *var)
1455 return my_value_of_variable (var, var->format);
1458 /* Set the value of an object variable (if it is editable) to the
1459 value of the given expression. */
1460 /* Note: Invokes functions that can call error(). */
1463 varobj_set_value (struct varobj *var, char *expression)
1465 struct value *val = NULL; /* Initialize to keep gcc happy. */
1466 /* The argument "expression" contains the variable's new value.
1467 We need to first construct a legal expression for this -- ugh! */
1468 /* Does this cover all the bases? */
1469 struct expression *exp;
1470 struct value *value = NULL; /* Initialize to keep gcc happy. */
1471 int saved_input_radix = input_radix;
1472 char *s = expression;
1473 volatile struct gdb_exception except;
1475 gdb_assert (varobj_editable_p (var));
1477 input_radix = 10; /* ALWAYS reset to decimal temporarily. */
1478 exp = parse_exp_1 (&s, 0, 0, 0);
1479 TRY_CATCH (except, RETURN_MASK_ERROR)
1481 value = evaluate_expression (exp);
1484 if (except.reason < 0)
1486 /* We cannot proceed without a valid expression. */
1491 /* All types that are editable must also be changeable. */
1492 gdb_assert (varobj_value_is_changeable_p (var));
1494 /* The value of a changeable variable object must not be lazy. */
1495 gdb_assert (!value_lazy (var->value));
1497 /* Need to coerce the input. We want to check if the
1498 value of the variable object will be different
1499 after assignment, and the first thing value_assign
1500 does is coerce the input.
1501 For example, if we are assigning an array to a pointer variable we
1502 should compare the pointer with the array's address, not with the
1504 value = coerce_array (value);
1506 /* The new value may be lazy. value_assign, or
1507 rather value_contents, will take care of this. */
1508 TRY_CATCH (except, RETURN_MASK_ERROR)
1510 val = value_assign (var->value, value);
1513 if (except.reason < 0)
1516 /* If the value has changed, record it, so that next -var-update can
1517 report this change. If a variable had a value of '1', we've set it
1518 to '333' and then set again to '1', when -var-update will report this
1519 variable as changed -- because the first assignment has set the
1520 'updated' flag. There's no need to optimize that, because return value
1521 of -var-update should be considered an approximation. */
1522 var->updated = install_new_value (var, val, 0 /* Compare values. */);
1523 input_radix = saved_input_radix;
1529 /* A helper function to install a constructor function and visualizer
1533 install_visualizer (struct varobj *var, PyObject *constructor,
1534 PyObject *visualizer)
1536 Py_XDECREF (var->constructor);
1537 var->constructor = constructor;
1539 Py_XDECREF (var->pretty_printer);
1540 var->pretty_printer = visualizer;
1542 Py_XDECREF (var->child_iter);
1543 var->child_iter = NULL;
1546 /* Install the default visualizer for VAR. */
1549 install_default_visualizer (struct varobj *var)
1551 /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */
1552 if (CPLUS_FAKE_CHILD (var))
1555 if (pretty_printing)
1557 PyObject *pretty_printer = NULL;
1561 pretty_printer = gdbpy_get_varobj_pretty_printer (var->value);
1562 if (! pretty_printer)
1564 gdbpy_print_stack ();
1565 error (_("Cannot instantiate printer for default visualizer"));
1569 if (pretty_printer == Py_None)
1571 Py_DECREF (pretty_printer);
1572 pretty_printer = NULL;
1575 install_visualizer (var, NULL, pretty_printer);
1579 /* Instantiate and install a visualizer for VAR using CONSTRUCTOR to
1580 make a new object. */
1583 construct_visualizer (struct varobj *var, PyObject *constructor)
1585 PyObject *pretty_printer;
1587 /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */
1588 if (CPLUS_FAKE_CHILD (var))
1591 Py_INCREF (constructor);
1592 if (constructor == Py_None)
1593 pretty_printer = NULL;
1596 pretty_printer = instantiate_pretty_printer (constructor, var->value);
1597 if (! pretty_printer)
1599 gdbpy_print_stack ();
1600 Py_DECREF (constructor);
1601 constructor = Py_None;
1602 Py_INCREF (constructor);
1605 if (pretty_printer == Py_None)
1607 Py_DECREF (pretty_printer);
1608 pretty_printer = NULL;
1612 install_visualizer (var, constructor, pretty_printer);
1615 #endif /* HAVE_PYTHON */
1617 /* A helper function for install_new_value. This creates and installs
1618 a visualizer for VAR, if appropriate. */
1621 install_new_value_visualizer (struct varobj *var)
1624 /* If the constructor is None, then we want the raw value. If VAR
1625 does not have a value, just skip this. */
1626 if (var->constructor != Py_None && var->value)
1628 struct cleanup *cleanup;
1630 cleanup = varobj_ensure_python_env (var);
1632 if (!var->constructor)
1633 install_default_visualizer (var);
1635 construct_visualizer (var, var->constructor);
1637 do_cleanups (cleanup);
1644 /* When using RTTI to determine variable type it may be changed in runtime when
1645 the variable value is changed. This function checks whether type of varobj
1646 VAR will change when a new value NEW_VALUE is assigned and if it is so
1647 updates the type of VAR. */
1650 update_type_if_necessary (struct varobj *var, struct value *new_value)
1654 struct value_print_options opts;
1656 get_user_print_options (&opts);
1657 if (opts.objectprint)
1659 struct type *new_type;
1660 char *curr_type_str, *new_type_str;
1662 new_type = value_actual_type (new_value, 0, 0);
1663 new_type_str = type_to_string (new_type);
1664 curr_type_str = varobj_get_type (var);
1665 if (strcmp (curr_type_str, new_type_str) != 0)
1667 var->type = new_type;
1669 /* This information may be not valid for a new type. */
1670 varobj_delete (var, NULL, 1);
1671 VEC_free (varobj_p, var->children);
1672 var->num_children = -1;
1681 /* Assign a new value to a variable object. If INITIAL is non-zero,
1682 this is the first assignement after the variable object was just
1683 created, or changed type. In that case, just assign the value
1685 Otherwise, assign the new value, and return 1 if the value is
1686 different from the current one, 0 otherwise. The comparison is
1687 done on textual representation of value. Therefore, some types
1688 need not be compared. E.g. for structures the reported value is
1689 always "{...}", so no comparison is necessary here. If the old
1690 value was NULL and new one is not, or vice versa, we always return 1.
1692 The VALUE parameter should not be released -- the function will
1693 take care of releasing it when needed. */
1695 install_new_value (struct varobj *var, struct value *value, int initial)
1700 int intentionally_not_fetched = 0;
1701 char *print_value = NULL;
1703 /* We need to know the varobj's type to decide if the value should
1704 be fetched or not. C++ fake children (public/protected/private)
1705 don't have a type. */
1706 gdb_assert (var->type || CPLUS_FAKE_CHILD (var));
1707 changeable = varobj_value_is_changeable_p (var);
1709 /* If the type has custom visualizer, we consider it to be always
1710 changeable. FIXME: need to make sure this behaviour will not
1711 mess up read-sensitive values. */
1712 if (var->pretty_printer)
1715 need_to_fetch = changeable;
1717 /* We are not interested in the address of references, and given
1718 that in C++ a reference is not rebindable, it cannot
1719 meaningfully change. So, get hold of the real value. */
1721 value = coerce_ref (value);
1723 if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION)
1724 /* For unions, we need to fetch the value implicitly because
1725 of implementation of union member fetch. When gdb
1726 creates a value for a field and the value of the enclosing
1727 structure is not lazy, it immediately copies the necessary
1728 bytes from the enclosing values. If the enclosing value is
1729 lazy, the call to value_fetch_lazy on the field will read
1730 the data from memory. For unions, that means we'll read the
1731 same memory more than once, which is not desirable. So
1735 /* The new value might be lazy. If the type is changeable,
1736 that is we'll be comparing values of this type, fetch the
1737 value now. Otherwise, on the next update the old value
1738 will be lazy, which means we've lost that old value. */
1739 if (need_to_fetch && value && value_lazy (value))
1741 struct varobj *parent = var->parent;
1742 int frozen = var->frozen;
1744 for (; !frozen && parent; parent = parent->parent)
1745 frozen |= parent->frozen;
1747 if (frozen && initial)
1749 /* For variables that are frozen, or are children of frozen
1750 variables, we don't do fetch on initial assignment.
1751 For non-initial assignemnt we do the fetch, since it means we're
1752 explicitly asked to compare the new value with the old one. */
1753 intentionally_not_fetched = 1;
1757 volatile struct gdb_exception except;
1759 TRY_CATCH (except, RETURN_MASK_ERROR)
1761 value_fetch_lazy (value);
1764 if (except.reason < 0)
1766 /* Set the value to NULL, so that for the next -var-update,
1767 we don't try to compare the new value with this value,
1768 that we couldn't even read. */
1774 /* Get a reference now, before possibly passing it to any Python
1775 code that might release it. */
1777 value_incref (value);
1779 /* Below, we'll be comparing string rendering of old and new
1780 values. Don't get string rendering if the value is
1781 lazy -- if it is, the code above has decided that the value
1782 should not be fetched. */
1783 if (value && !value_lazy (value) && !var->pretty_printer)
1784 print_value = value_get_print_value (value, var->format, var);
1786 /* If the type is changeable, compare the old and the new values.
1787 If this is the initial assignment, we don't have any old value
1789 if (!initial && changeable)
1791 /* If the value of the varobj was changed by -var-set-value,
1792 then the value in the varobj and in the target is the same.
1793 However, that value is different from the value that the
1794 varobj had after the previous -var-update. So need to the
1795 varobj as changed. */
1800 else if (! var->pretty_printer)
1802 /* Try to compare the values. That requires that both
1803 values are non-lazy. */
1804 if (var->not_fetched && value_lazy (var->value))
1806 /* This is a frozen varobj and the value was never read.
1807 Presumably, UI shows some "never read" indicator.
1808 Now that we've fetched the real value, we need to report
1809 this varobj as changed so that UI can show the real
1813 else if (var->value == NULL && value == NULL)
1816 else if (var->value == NULL || value == NULL)
1822 gdb_assert (!value_lazy (var->value));
1823 gdb_assert (!value_lazy (value));
1825 gdb_assert (var->print_value != NULL && print_value != NULL);
1826 if (strcmp (var->print_value, print_value) != 0)
1832 if (!initial && !changeable)
1834 /* For values that are not changeable, we don't compare the values.
1835 However, we want to notice if a value was not NULL and now is NULL,
1836 or vise versa, so that we report when top-level varobjs come in scope
1837 and leave the scope. */
1838 changed = (var->value != NULL) != (value != NULL);
1841 /* We must always keep the new value, since children depend on it. */
1842 if (var->value != NULL && var->value != value)
1843 value_free (var->value);
1845 if (value && value_lazy (value) && intentionally_not_fetched)
1846 var->not_fetched = 1;
1848 var->not_fetched = 0;
1851 install_new_value_visualizer (var);
1853 /* If we installed a pretty-printer, re-compare the printed version
1854 to see if the variable changed. */
1855 if (var->pretty_printer)
1857 xfree (print_value);
1858 print_value = value_get_print_value (var->value, var->format, var);
1859 if ((var->print_value == NULL && print_value != NULL)
1860 || (var->print_value != NULL && print_value == NULL)
1861 || (var->print_value != NULL && print_value != NULL
1862 && strcmp (var->print_value, print_value) != 0))
1865 if (var->print_value)
1866 xfree (var->print_value);
1867 var->print_value = print_value;
1869 gdb_assert (!var->value || value_type (var->value));
1874 /* Return the requested range for a varobj. VAR is the varobj. FROM
1875 and TO are out parameters; *FROM and *TO will be set to the
1876 selected sub-range of VAR. If no range was selected using
1877 -var-set-update-range, then both will be -1. */
1879 varobj_get_child_range (struct varobj *var, int *from, int *to)
1885 /* Set the selected sub-range of children of VAR to start at index
1886 FROM and end at index TO. If either FROM or TO is less than zero,
1887 this is interpreted as a request for all children. */
1889 varobj_set_child_range (struct varobj *var, int from, int to)
1896 varobj_set_visualizer (struct varobj *var, const char *visualizer)
1899 PyObject *mainmod, *globals, *constructor;
1900 struct cleanup *back_to;
1902 back_to = varobj_ensure_python_env (var);
1904 mainmod = PyImport_AddModule ("__main__");
1905 globals = PyModule_GetDict (mainmod);
1906 Py_INCREF (globals);
1907 make_cleanup_py_decref (globals);
1909 constructor = PyRun_String (visualizer, Py_eval_input, globals, globals);
1913 gdbpy_print_stack ();
1914 error (_("Could not evaluate visualizer expression: %s"), visualizer);
1917 construct_visualizer (var, constructor);
1918 Py_XDECREF (constructor);
1920 /* If there are any children now, wipe them. */
1921 varobj_delete (var, NULL, 1 /* children only */);
1922 var->num_children = -1;
1924 do_cleanups (back_to);
1926 error (_("Python support required"));
1930 /* If NEW_VALUE is the new value of the given varobj (var), return
1931 non-zero if var has mutated. In other words, if the type of
1932 the new value is different from the type of the varobj's old
1935 NEW_VALUE may be NULL, if the varobj is now out of scope. */
1938 varobj_value_has_mutated (struct varobj *var, struct value *new_value,
1939 struct type *new_type)
1941 /* If we haven't previously computed the number of children in var,
1942 it does not matter from the front-end's perspective whether
1943 the type has mutated or not. For all intents and purposes,
1944 it has not mutated. */
1945 if (var->num_children < 0)
1948 if (var->root->lang->value_has_mutated)
1949 return var->root->lang->value_has_mutated (var, new_value, new_type);
1954 /* Update the values for a variable and its children. This is a
1955 two-pronged attack. First, re-parse the value for the root's
1956 expression to see if it's changed. Then go all the way
1957 through its children, reconstructing them and noting if they've
1960 The EXPLICIT parameter specifies if this call is result
1961 of MI request to update this specific variable, or
1962 result of implicit -var-update *. For implicit request, we don't
1963 update frozen variables.
1965 NOTE: This function may delete the caller's varobj. If it
1966 returns TYPE_CHANGED, then it has done this and VARP will be modified
1967 to point to the new varobj. */
1969 VEC(varobj_update_result) *
1970 varobj_update (struct varobj **varp, int explicit)
1973 int type_changed = 0;
1976 VEC (varobj_update_result) *stack = NULL;
1977 VEC (varobj_update_result) *result = NULL;
1979 /* Frozen means frozen -- we don't check for any change in
1980 this varobj, including its going out of scope, or
1981 changing type. One use case for frozen varobjs is
1982 retaining previously evaluated expressions, and we don't
1983 want them to be reevaluated at all. */
1984 if (!explicit && (*varp)->frozen)
1987 if (!(*varp)->root->is_valid)
1989 varobj_update_result r = {0};
1992 r.status = VAROBJ_INVALID;
1993 VEC_safe_push (varobj_update_result, result, &r);
1997 if ((*varp)->root->rootvar == *varp)
1999 varobj_update_result r = {0};
2002 r.status = VAROBJ_IN_SCOPE;
2004 /* Update the root variable. value_of_root can return NULL
2005 if the variable is no longer around, i.e. we stepped out of
2006 the frame in which a local existed. We are letting the
2007 value_of_root variable dispose of the varobj if the type
2009 new = value_of_root (varp, &type_changed);
2010 if (update_type_if_necessary(*varp, new))
2013 r.type_changed = type_changed;
2014 if (install_new_value ((*varp), new, type_changed))
2018 r.status = VAROBJ_NOT_IN_SCOPE;
2019 r.value_installed = 1;
2021 if (r.status == VAROBJ_NOT_IN_SCOPE)
2023 if (r.type_changed || r.changed)
2024 VEC_safe_push (varobj_update_result, result, &r);
2028 VEC_safe_push (varobj_update_result, stack, &r);
2032 varobj_update_result r = {0};
2035 VEC_safe_push (varobj_update_result, stack, &r);
2038 /* Walk through the children, reconstructing them all. */
2039 while (!VEC_empty (varobj_update_result, stack))
2041 varobj_update_result r = *(VEC_last (varobj_update_result, stack));
2042 struct varobj *v = r.varobj;
2044 VEC_pop (varobj_update_result, stack);
2046 /* Update this variable, unless it's a root, which is already
2048 if (!r.value_installed)
2050 struct type *new_type;
2052 new = value_of_child (v->parent, v->index);
2053 if (update_type_if_necessary(v, new))
2056 new_type = value_type (new);
2058 new_type = v->root->lang->type_of_child (v->parent, v->index);
2060 if (varobj_value_has_mutated (v, new, new_type))
2062 /* The children are no longer valid; delete them now.
2063 Report the fact that its type changed as well. */
2064 varobj_delete (v, NULL, 1 /* only_children */);
2065 v->num_children = -1;
2072 if (install_new_value (v, new, r.type_changed))
2079 /* We probably should not get children of a varobj that has a
2080 pretty-printer, but for which -var-list-children was never
2082 if (v->pretty_printer)
2084 VEC (varobj_p) *changed = 0, *type_changed = 0, *unchanged = 0;
2085 VEC (varobj_p) *new = 0;
2086 int i, children_changed = 0;
2091 if (!v->children_requested)
2095 /* If we initially did not have potential children, but
2096 now we do, consider the varobj as changed.
2097 Otherwise, if children were never requested, consider
2098 it as unchanged -- presumably, such varobj is not yet
2099 expanded in the UI, so we need not bother getting
2101 if (!varobj_has_more (v, 0))
2103 update_dynamic_varobj_children (v, NULL, NULL, NULL, NULL,
2105 if (varobj_has_more (v, 0))
2110 VEC_safe_push (varobj_update_result, result, &r);
2115 /* If update_dynamic_varobj_children returns 0, then we have
2116 a non-conforming pretty-printer, so we skip it. */
2117 if (update_dynamic_varobj_children (v, &changed, &type_changed, &new,
2118 &unchanged, &children_changed, 1,
2121 if (children_changed || new)
2123 r.children_changed = 1;
2126 /* Push in reverse order so that the first child is
2127 popped from the work stack first, and so will be
2128 added to result first. This does not affect
2129 correctness, just "nicer". */
2130 for (i = VEC_length (varobj_p, type_changed) - 1; i >= 0; --i)
2132 varobj_p tmp = VEC_index (varobj_p, type_changed, i);
2133 varobj_update_result r = {0};
2135 /* Type may change only if value was changed. */
2139 r.value_installed = 1;
2140 VEC_safe_push (varobj_update_result, stack, &r);
2142 for (i = VEC_length (varobj_p, changed) - 1; i >= 0; --i)
2144 varobj_p tmp = VEC_index (varobj_p, changed, i);
2145 varobj_update_result r = {0};
2149 r.value_installed = 1;
2150 VEC_safe_push (varobj_update_result, stack, &r);
2152 for (i = VEC_length (varobj_p, unchanged) - 1; i >= 0; --i)
2154 varobj_p tmp = VEC_index (varobj_p, unchanged, i);
2158 varobj_update_result r = {0};
2161 r.value_installed = 1;
2162 VEC_safe_push (varobj_update_result, stack, &r);
2165 if (r.changed || r.children_changed)
2166 VEC_safe_push (varobj_update_result, result, &r);
2168 /* Free CHANGED, TYPE_CHANGED and UNCHANGED, but not NEW,
2169 because NEW has been put into the result vector. */
2170 VEC_free (varobj_p, changed);
2171 VEC_free (varobj_p, type_changed);
2172 VEC_free (varobj_p, unchanged);
2178 /* Push any children. Use reverse order so that the first
2179 child is popped from the work stack first, and so
2180 will be added to result first. This does not
2181 affect correctness, just "nicer". */
2182 for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i)
2184 varobj_p c = VEC_index (varobj_p, v->children, i);
2186 /* Child may be NULL if explicitly deleted by -var-delete. */
2187 if (c != NULL && !c->frozen)
2189 varobj_update_result r = {0};
2192 VEC_safe_push (varobj_update_result, stack, &r);
2196 if (r.changed || r.type_changed)
2197 VEC_safe_push (varobj_update_result, result, &r);
2200 VEC_free (varobj_update_result, stack);
2206 /* Helper functions */
2209 * Variable object construction/destruction
2213 delete_variable (struct cpstack **resultp, struct varobj *var,
2214 int only_children_p)
2218 delete_variable_1 (resultp, &delcount, var,
2219 only_children_p, 1 /* remove_from_parent_p */ );
2224 /* Delete the variable object VAR and its children. */
2225 /* IMPORTANT NOTE: If we delete a variable which is a child
2226 and the parent is not removed we dump core. It must be always
2227 initially called with remove_from_parent_p set. */
2229 delete_variable_1 (struct cpstack **resultp, int *delcountp,
2230 struct varobj *var, int only_children_p,
2231 int remove_from_parent_p)
2235 /* Delete any children of this variable, too. */
2236 for (i = 0; i < VEC_length (varobj_p, var->children); ++i)
2238 varobj_p child = VEC_index (varobj_p, var->children, i);
2242 if (!remove_from_parent_p)
2243 child->parent = NULL;
2244 delete_variable_1 (resultp, delcountp, child, 0, only_children_p);
2246 VEC_free (varobj_p, var->children);
2248 /* if we were called to delete only the children we are done here. */
2249 if (only_children_p)
2252 /* Otherwise, add it to the list of deleted ones and proceed to do so. */
2253 /* If the name is null, this is a temporary variable, that has not
2254 yet been installed, don't report it, it belongs to the caller... */
2255 if (var->obj_name != NULL)
2257 cppush (resultp, xstrdup (var->obj_name));
2258 *delcountp = *delcountp + 1;
2261 /* If this variable has a parent, remove it from its parent's list. */
2262 /* OPTIMIZATION: if the parent of this variable is also being deleted,
2263 (as indicated by remove_from_parent_p) we don't bother doing an
2264 expensive list search to find the element to remove when we are
2265 discarding the list afterwards. */
2266 if ((remove_from_parent_p) && (var->parent != NULL))
2268 VEC_replace (varobj_p, var->parent->children, var->index, NULL);
2271 if (var->obj_name != NULL)
2272 uninstall_variable (var);
2274 /* Free memory associated with this variable. */
2275 free_variable (var);
2278 /* Install the given variable VAR with the object name VAR->OBJ_NAME. */
2280 install_variable (struct varobj *var)
2283 struct vlist *newvl;
2285 unsigned int index = 0;
2288 for (chp = var->obj_name; *chp; chp++)
2290 index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE;
2293 cv = *(varobj_table + index);
2294 while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0))
2298 error (_("Duplicate variable object name"));
2300 /* Add varobj to hash table. */
2301 newvl = xmalloc (sizeof (struct vlist));
2302 newvl->next = *(varobj_table + index);
2304 *(varobj_table + index) = newvl;
2306 /* If root, add varobj to root list. */
2307 if (is_root_p (var))
2309 /* Add to list of root variables. */
2310 if (rootlist == NULL)
2311 var->root->next = NULL;
2313 var->root->next = rootlist;
2314 rootlist = var->root;
2320 /* Unistall the object VAR. */
2322 uninstall_variable (struct varobj *var)
2326 struct varobj_root *cr;
2327 struct varobj_root *prer;
2329 unsigned int index = 0;
2332 /* Remove varobj from hash table. */
2333 for (chp = var->obj_name; *chp; chp++)
2335 index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE;
2338 cv = *(varobj_table + index);
2340 while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0))
2347 fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name);
2352 ("Assertion failed: Could not find variable object \"%s\" to delete",
2358 *(varobj_table + index) = cv->next;
2360 prev->next = cv->next;
2364 /* If root, remove varobj from root list. */
2365 if (is_root_p (var))
2367 /* Remove from list of root variables. */
2368 if (rootlist == var->root)
2369 rootlist = var->root->next;
2374 while ((cr != NULL) && (cr->rootvar != var))
2381 warning (_("Assertion failed: Could not find "
2382 "varobj \"%s\" in root list"),
2389 prer->next = cr->next;
2395 /* Create and install a child of the parent of the given name. */
2396 static struct varobj *
2397 create_child (struct varobj *parent, int index, char *name)
2399 return create_child_with_value (parent, index, name,
2400 value_of_child (parent, index));
2403 /* Does CHILD represent a child with no name? This happens when
2404 the child is an anonmous struct or union and it has no field name
2405 in its parent variable.
2407 This has already been determined by *_describe_child. The easiest
2408 thing to do is to compare the child's name with ANONYMOUS_*_NAME. */
2411 is_anonymous_child (struct varobj *child)
2413 return (strcmp (child->name, ANONYMOUS_STRUCT_NAME) == 0
2414 || strcmp (child->name, ANONYMOUS_UNION_NAME) == 0);
2417 static struct varobj *
2418 create_child_with_value (struct varobj *parent, int index, const char *name,
2419 struct value *value)
2421 struct varobj *child;
2424 child = new_variable ();
2426 /* Name is allocated by name_of_child. */
2427 /* FIXME: xstrdup should not be here. */
2428 child->name = xstrdup (name);
2429 child->index = index;
2430 child->parent = parent;
2431 child->root = parent->root;
2433 if (is_anonymous_child (child))
2434 childs_name = xstrprintf ("%s.%d_anonymous", parent->obj_name, index);
2436 childs_name = xstrprintf ("%s.%s", parent->obj_name, name);
2437 child->obj_name = childs_name;
2439 install_variable (child);
2441 /* Compute the type of the child. Must do this before
2442 calling install_new_value. */
2444 /* If the child had no evaluation errors, var->value
2445 will be non-NULL and contain a valid type. */
2446 child->type = value_actual_type (value, 0, NULL);
2448 /* Otherwise, we must compute the type. */
2449 child->type = (*child->root->lang->type_of_child) (child->parent,
2451 install_new_value (child, value, 1);
2458 * Miscellaneous utility functions.
2461 /* Allocate memory and initialize a new variable. */
2462 static struct varobj *
2467 var = (struct varobj *) xmalloc (sizeof (struct varobj));
2469 var->path_expr = NULL;
2470 var->obj_name = NULL;
2474 var->num_children = -1;
2476 var->children = NULL;
2480 var->print_value = NULL;
2482 var->not_fetched = 0;
2483 var->children_requested = 0;
2486 var->constructor = 0;
2487 var->pretty_printer = 0;
2488 var->child_iter = 0;
2489 var->saved_item = 0;
2494 /* Allocate memory and initialize a new root variable. */
2495 static struct varobj *
2496 new_root_variable (void)
2498 struct varobj *var = new_variable ();
2500 var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));
2501 var->root->lang = NULL;
2502 var->root->exp = NULL;
2503 var->root->valid_block = NULL;
2504 var->root->frame = null_frame_id;
2505 var->root->floating = 0;
2506 var->root->rootvar = NULL;
2507 var->root->is_valid = 1;
2512 /* Free any allocated memory associated with VAR. */
2514 free_variable (struct varobj *var)
2517 if (var->pretty_printer)
2519 struct cleanup *cleanup = varobj_ensure_python_env (var);
2520 Py_XDECREF (var->constructor);
2521 Py_XDECREF (var->pretty_printer);
2522 Py_XDECREF (var->child_iter);
2523 Py_XDECREF (var->saved_item);
2524 do_cleanups (cleanup);
2528 value_free (var->value);
2530 /* Free the expression if this is a root variable. */
2531 if (is_root_p (var))
2533 xfree (var->root->exp);
2538 xfree (var->obj_name);
2539 xfree (var->print_value);
2540 xfree (var->path_expr);
2545 do_free_variable_cleanup (void *var)
2547 free_variable (var);
2550 static struct cleanup *
2551 make_cleanup_free_variable (struct varobj *var)
2553 return make_cleanup (do_free_variable_cleanup, var);
2556 /* This returns the type of the variable. It also skips past typedefs
2557 to return the real type of the variable.
2559 NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file
2560 except within get_target_type and get_type. */
2561 static struct type *
2562 get_type (struct varobj *var)
2568 type = check_typedef (type);
2573 /* Return the type of the value that's stored in VAR,
2574 or that would have being stored there if the
2575 value were accessible.
2577 This differs from VAR->type in that VAR->type is always
2578 the true type of the expession in the source language.
2579 The return value of this function is the type we're
2580 actually storing in varobj, and using for displaying
2581 the values and for comparing previous and new values.
2583 For example, top-level references are always stripped. */
2584 static struct type *
2585 get_value_type (struct varobj *var)
2590 type = value_type (var->value);
2594 type = check_typedef (type);
2596 if (TYPE_CODE (type) == TYPE_CODE_REF)
2597 type = get_target_type (type);
2599 type = check_typedef (type);
2604 /* This returns the target type (or NULL) of TYPE, also skipping
2605 past typedefs, just like get_type ().
2607 NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file
2608 except within get_target_type and get_type. */
2609 static struct type *
2610 get_target_type (struct type *type)
2614 type = TYPE_TARGET_TYPE (type);
2616 type = check_typedef (type);
2622 /* What is the default display for this variable? We assume that
2623 everything is "natural". Any exceptions? */
2624 static enum varobj_display_formats
2625 variable_default_display (struct varobj *var)
2627 return FORMAT_NATURAL;
2630 /* FIXME: The following should be generic for any pointer. */
2632 cppush (struct cpstack **pstack, char *name)
2636 s = (struct cpstack *) xmalloc (sizeof (struct cpstack));
2642 /* FIXME: The following should be generic for any pointer. */
2644 cppop (struct cpstack **pstack)
2649 if ((*pstack)->name == NULL && (*pstack)->next == NULL)
2654 *pstack = (*pstack)->next;
2661 * Language-dependencies
2664 /* Common entry points */
2666 /* Get the language of variable VAR. */
2667 static enum varobj_languages
2668 variable_language (struct varobj *var)
2670 enum varobj_languages lang;
2672 switch (var->root->exp->language_defn->la_language)
2678 case language_cplus:
2692 /* Return the number of children for a given variable.
2693 The result of this function is defined by the language
2694 implementation. The number of children returned by this function
2695 is the number of children that the user will see in the variable
2698 number_of_children (struct varobj *var)
2700 return (*var->root->lang->number_of_children) (var);
2703 /* What is the expression for the root varobj VAR? Returns a malloc'd
2706 name_of_variable (struct varobj *var)
2708 return (*var->root->lang->name_of_variable) (var);
2711 /* What is the name of the INDEX'th child of VAR? Returns a malloc'd
2714 name_of_child (struct varobj *var, int index)
2716 return (*var->root->lang->name_of_child) (var, index);
2719 /* What is the ``struct value *'' of the root variable VAR?
2720 For floating variable object, evaluation can get us a value
2721 of different type from what is stored in varobj already. In
2723 - *type_changed will be set to 1
2724 - old varobj will be freed, and new one will be
2725 created, with the same name.
2726 - *var_handle will be set to the new varobj
2727 Otherwise, *type_changed will be set to 0. */
2728 static struct value *
2729 value_of_root (struct varobj **var_handle, int *type_changed)
2733 if (var_handle == NULL)
2738 /* This should really be an exception, since this should
2739 only get called with a root variable. */
2741 if (!is_root_p (var))
2744 if (var->root->floating)
2746 struct varobj *tmp_var;
2747 char *old_type, *new_type;
2749 tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0,
2750 USE_SELECTED_FRAME);
2751 if (tmp_var == NULL)
2755 old_type = varobj_get_type (var);
2756 new_type = varobj_get_type (tmp_var);
2757 if (strcmp (old_type, new_type) == 0)
2759 /* The expression presently stored inside var->root->exp
2760 remembers the locations of local variables relatively to
2761 the frame where the expression was created (in DWARF location
2762 button, for example). Naturally, those locations are not
2763 correct in other frames, so update the expression. */
2765 struct expression *tmp_exp = var->root->exp;
2767 var->root->exp = tmp_var->root->exp;
2768 tmp_var->root->exp = tmp_exp;
2770 varobj_delete (tmp_var, NULL, 0);
2775 tmp_var->obj_name = xstrdup (var->obj_name);
2776 tmp_var->from = var->from;
2777 tmp_var->to = var->to;
2778 varobj_delete (var, NULL, 0);
2780 install_variable (tmp_var);
2781 *var_handle = tmp_var;
2794 struct value *value;
2796 value = (*var->root->lang->value_of_root) (var_handle);
2797 if (var->value == NULL || value == NULL)
2799 /* For root varobj-s, a NULL value indicates a scoping issue.
2800 So, nothing to do in terms of checking for mutations. */
2802 else if (varobj_value_has_mutated (var, value, value_type (value)))
2804 /* The type has mutated, so the children are no longer valid.
2805 Just delete them, and tell our caller that the type has
2807 varobj_delete (var, NULL, 1 /* only_children */);
2808 var->num_children = -1;
2817 /* What is the ``struct value *'' for the INDEX'th child of PARENT? */
2818 static struct value *
2819 value_of_child (struct varobj *parent, int index)
2821 struct value *value;
2823 value = (*parent->root->lang->value_of_child) (parent, index);
2828 /* GDB already has a command called "value_of_variable". Sigh. */
2830 my_value_of_variable (struct varobj *var, enum varobj_display_formats format)
2832 if (var->root->is_valid)
2834 if (var->pretty_printer)
2835 return value_get_print_value (var->value, var->format, var);
2836 return (*var->root->lang->value_of_variable) (var, format);
2843 value_get_print_value (struct value *value, enum varobj_display_formats format,
2846 struct ui_file *stb;
2847 struct cleanup *old_chain;
2848 gdb_byte *thevalue = NULL;
2849 struct value_print_options opts;
2850 struct type *type = NULL;
2852 char *encoding = NULL;
2853 struct gdbarch *gdbarch = NULL;
2854 /* Initialize it just to avoid a GCC false warning. */
2855 CORE_ADDR str_addr = 0;
2856 int string_print = 0;
2861 stb = mem_fileopen ();
2862 old_chain = make_cleanup_ui_file_delete (stb);
2864 gdbarch = get_type_arch (value_type (value));
2867 PyObject *value_formatter = var->pretty_printer;
2869 varobj_ensure_python_env (var);
2871 if (value_formatter)
2873 /* First check to see if we have any children at all. If so,
2874 we simply return {...}. */
2875 if (dynamic_varobj_has_child_method (var))
2877 do_cleanups (old_chain);
2878 return xstrdup ("{...}");
2881 if (PyObject_HasAttr (value_formatter, gdbpy_to_string_cst))
2883 struct value *replacement;
2884 PyObject *output = NULL;
2886 output = apply_varobj_pretty_printer (value_formatter,
2890 /* If we have string like output ... */
2893 make_cleanup_py_decref (output);
2895 /* If this is a lazy string, extract it. For lazy
2896 strings we always print as a string, so set
2898 if (gdbpy_is_lazy_string (output))
2900 gdbpy_extract_lazy_string (output, &str_addr, &type,
2902 make_cleanup (free_current_contents, &encoding);
2907 /* If it is a regular (non-lazy) string, extract
2908 it and copy the contents into THEVALUE. If the
2909 hint says to print it as a string, set
2910 string_print. Otherwise just return the extracted
2911 string as a value. */
2913 char *s = python_string_to_target_string (output);
2919 hint = gdbpy_get_display_hint (value_formatter);
2922 if (!strcmp (hint, "string"))
2928 thevalue = xmemdup (s, len + 1, len + 1);
2929 type = builtin_type (gdbarch)->builtin_char;
2934 do_cleanups (old_chain);
2938 make_cleanup (xfree, thevalue);
2941 gdbpy_print_stack ();
2944 /* If the printer returned a replacement value, set VALUE
2945 to REPLACEMENT. If there is not a replacement value,
2946 just use the value passed to this function. */
2948 value = replacement;
2954 get_formatted_print_options (&opts, format_code[(int) format]);
2958 /* If the THEVALUE has contents, it is a regular string. */
2960 LA_PRINT_STRING (stb, type, thevalue, len, encoding, 0, &opts);
2961 else if (string_print)
2962 /* Otherwise, if string_print is set, and it is not a regular
2963 string, it is a lazy string. */
2964 val_print_string (type, encoding, str_addr, len, stb, &opts);
2966 /* All other cases. */
2967 common_val_print (value, stb, 0, &opts, current_language);
2969 thevalue = ui_file_xstrdup (stb, NULL);
2971 do_cleanups (old_chain);
2976 varobj_editable_p (struct varobj *var)
2980 if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value)))
2983 type = get_value_type (var);
2985 switch (TYPE_CODE (type))
2987 case TYPE_CODE_STRUCT:
2988 case TYPE_CODE_UNION:
2989 case TYPE_CODE_ARRAY:
2990 case TYPE_CODE_FUNC:
2991 case TYPE_CODE_METHOD:
3001 /* Call VAR's value_is_changeable_p language-specific callback. */
3004 varobj_value_is_changeable_p (struct varobj *var)
3006 return var->root->lang->value_is_changeable_p (var);
3009 /* Return 1 if that varobj is floating, that is is always evaluated in the
3010 selected frame, and not bound to thread/frame. Such variable objects
3011 are created using '@' as frame specifier to -var-create. */
3013 varobj_floating_p (struct varobj *var)
3015 return var->root->floating;
3018 /* Given the value and the type of a variable object,
3019 adjust the value and type to those necessary
3020 for getting children of the variable object.
3021 This includes dereferencing top-level references
3022 to all types and dereferencing pointers to
3025 If LOOKUP_ACTUAL_TYPE is set the enclosing type of the
3026 value will be fetched and if it differs from static type
3027 the value will be casted to it.
3029 Both TYPE and *TYPE should be non-null. VALUE
3030 can be null if we want to only translate type.
3031 *VALUE can be null as well -- if the parent
3034 If WAS_PTR is not NULL, set *WAS_PTR to 0 or 1
3035 depending on whether pointer was dereferenced
3036 in this function. */
3038 adjust_value_for_child_access (struct value **value,
3041 int lookup_actual_type)
3043 gdb_assert (type && *type);
3048 *type = check_typedef (*type);
3050 /* The type of value stored in varobj, that is passed
3051 to us, is already supposed to be
3052 reference-stripped. */
3054 gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF);
3056 /* Pointers to structures are treated just like
3057 structures when accessing children. Don't
3058 dererences pointers to other types. */
3059 if (TYPE_CODE (*type) == TYPE_CODE_PTR)
3061 struct type *target_type = get_target_type (*type);
3062 if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT
3063 || TYPE_CODE (target_type) == TYPE_CODE_UNION)
3065 if (value && *value)
3067 volatile struct gdb_exception except;
3069 TRY_CATCH (except, RETURN_MASK_ERROR)
3071 *value = value_ind (*value);
3074 if (except.reason < 0)
3077 *type = target_type;
3083 /* The 'get_target_type' function calls check_typedef on
3084 result, so we can immediately check type code. No
3085 need to call check_typedef here. */
3087 /* Access a real type of the value (if necessary and possible). */
3088 if (value && *value && lookup_actual_type)
3090 struct type *enclosing_type;
3091 int real_type_found = 0;
3093 enclosing_type = value_actual_type (*value, 1, &real_type_found);
3094 if (real_type_found)
3096 *type = enclosing_type;
3097 *value = value_cast (enclosing_type, *value);
3102 /* Implement the "value_is_changeable_p" varobj callback for most
3106 default_value_is_changeable_p (struct varobj *var)
3111 if (CPLUS_FAKE_CHILD (var))
3114 type = get_value_type (var);
3116 switch (TYPE_CODE (type))
3118 case TYPE_CODE_STRUCT:
3119 case TYPE_CODE_UNION:
3120 case TYPE_CODE_ARRAY:
3134 c_number_of_children (struct varobj *var)
3136 struct type *type = get_value_type (var);
3138 struct type *target;
3140 adjust_value_for_child_access (NULL, &type, NULL, 0);
3141 target = get_target_type (type);
3143 switch (TYPE_CODE (type))
3145 case TYPE_CODE_ARRAY:
3146 if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0
3147 && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
3148 children = TYPE_LENGTH (type) / TYPE_LENGTH (target);
3150 /* If we don't know how many elements there are, don't display
3155 case TYPE_CODE_STRUCT:
3156 case TYPE_CODE_UNION:
3157 children = TYPE_NFIELDS (type);
3161 /* The type here is a pointer to non-struct. Typically, pointers
3162 have one child, except for function ptrs, which have no children,
3163 and except for void*, as we don't know what to show.
3165 We can show char* so we allow it to be dereferenced. If you decide
3166 to test for it, please mind that a little magic is necessary to
3167 properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and
3168 TYPE_NAME == "char". */
3169 if (TYPE_CODE (target) == TYPE_CODE_FUNC
3170 || TYPE_CODE (target) == TYPE_CODE_VOID)
3177 /* Other types have no children. */
3185 c_name_of_variable (struct varobj *parent)
3187 return xstrdup (parent->name);
3190 /* Return the value of element TYPE_INDEX of a structure
3191 value VALUE. VALUE's type should be a structure,
3192 or union, or a typedef to struct/union.
3194 Returns NULL if getting the value fails. Never throws. */
3195 static struct value *
3196 value_struct_element_index (struct value *value, int type_index)
3198 struct value *result = NULL;
3199 volatile struct gdb_exception e;
3200 struct type *type = value_type (value);
3202 type = check_typedef (type);
3204 gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT
3205 || TYPE_CODE (type) == TYPE_CODE_UNION);
3207 TRY_CATCH (e, RETURN_MASK_ERROR)
3209 if (field_is_static (&TYPE_FIELD (type, type_index)))
3210 result = value_static_field (type, type_index);
3212 result = value_primitive_field (value, 0, type_index, type);
3224 /* Obtain the information about child INDEX of the variable
3226 If CNAME is not null, sets *CNAME to the name of the child relative
3228 If CVALUE is not null, sets *CVALUE to the value of the child.
3229 If CTYPE is not null, sets *CTYPE to the type of the child.
3231 If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding
3232 information cannot be determined, set *CNAME, *CVALUE, or *CTYPE
3235 c_describe_child (struct varobj *parent, int index,
3236 char **cname, struct value **cvalue, struct type **ctype,
3237 char **cfull_expression)
3239 struct value *value = parent->value;
3240 struct type *type = get_value_type (parent);
3241 char *parent_expression = NULL;
3243 volatile struct gdb_exception except;
3251 if (cfull_expression)
3253 *cfull_expression = NULL;
3254 parent_expression = varobj_get_path_expr (get_path_expr_parent (parent));
3256 adjust_value_for_child_access (&value, &type, &was_ptr, 0);
3258 switch (TYPE_CODE (type))
3260 case TYPE_CODE_ARRAY:
3263 = xstrdup (int_string (index
3264 + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)),
3267 if (cvalue && value)
3269 int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type));
3271 TRY_CATCH (except, RETURN_MASK_ERROR)
3273 *cvalue = value_subscript (value, real_index);
3278 *ctype = get_target_type (type);
3280 if (cfull_expression)
3282 xstrprintf ("(%s)[%s]", parent_expression,
3284 + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)),
3290 case TYPE_CODE_STRUCT:
3291 case TYPE_CODE_UNION:
3293 const char *field_name;
3295 /* If the type is anonymous and the field has no name,
3296 set an appropriate name. */
3297 field_name = TYPE_FIELD_NAME (type, index);
3298 if (field_name == NULL || *field_name == '\0')
3302 if (TYPE_CODE (TYPE_FIELD_TYPE (type, index))
3303 == TYPE_CODE_STRUCT)
3304 *cname = xstrdup (ANONYMOUS_STRUCT_NAME);
3306 *cname = xstrdup (ANONYMOUS_UNION_NAME);
3309 if (cfull_expression)
3310 *cfull_expression = xstrdup ("");
3315 *cname = xstrdup (field_name);
3317 if (cfull_expression)
3319 char *join = was_ptr ? "->" : ".";
3321 *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression,
3326 if (cvalue && value)
3328 /* For C, varobj index is the same as type index. */
3329 *cvalue = value_struct_element_index (value, index);
3333 *ctype = TYPE_FIELD_TYPE (type, index);
3339 *cname = xstrprintf ("*%s", parent->name);
3341 if (cvalue && value)
3343 TRY_CATCH (except, RETURN_MASK_ERROR)
3345 *cvalue = value_ind (value);
3348 if (except.reason < 0)
3352 /* Don't use get_target_type because it calls
3353 check_typedef and here, we want to show the true
3354 declared type of the variable. */
3356 *ctype = TYPE_TARGET_TYPE (type);
3358 if (cfull_expression)
3359 *cfull_expression = xstrprintf ("*(%s)", parent_expression);
3364 /* This should not happen. */
3366 *cname = xstrdup ("???");
3367 if (cfull_expression)
3368 *cfull_expression = xstrdup ("???");
3369 /* Don't set value and type, we don't know then. */
3374 c_name_of_child (struct varobj *parent, int index)
3378 c_describe_child (parent, index, &name, NULL, NULL, NULL);
3383 c_path_expr_of_child (struct varobj *child)
3385 c_describe_child (child->parent, child->index, NULL, NULL, NULL,
3387 return child->path_expr;
3390 /* If frame associated with VAR can be found, switch
3391 to it and return 1. Otherwise, return 0. */
3393 check_scope (struct varobj *var)
3395 struct frame_info *fi;
3398 fi = frame_find_by_id (var->root->frame);
3403 CORE_ADDR pc = get_frame_pc (fi);
3405 if (pc < BLOCK_START (var->root->valid_block) ||
3406 pc >= BLOCK_END (var->root->valid_block))
3414 static struct value *
3415 c_value_of_root (struct varobj **var_handle)
3417 struct value *new_val = NULL;
3418 struct varobj *var = *var_handle;
3419 int within_scope = 0;
3420 struct cleanup *back_to;
3422 /* Only root variables can be updated... */
3423 if (!is_root_p (var))
3424 /* Not a root var. */
3427 back_to = make_cleanup_restore_current_thread ();
3429 /* Determine whether the variable is still around. */
3430 if (var->root->valid_block == NULL || var->root->floating)
3432 else if (var->root->thread_id == 0)
3434 /* The program was single-threaded when the variable object was
3435 created. Technically, it's possible that the program became
3436 multi-threaded since then, but we don't support such
3438 within_scope = check_scope (var);
3442 ptid_t ptid = thread_id_to_pid (var->root->thread_id);
3443 if (in_thread_list (ptid))
3445 switch_to_thread (ptid);
3446 within_scope = check_scope (var);
3452 volatile struct gdb_exception except;
3454 /* We need to catch errors here, because if evaluate
3455 expression fails we want to just return NULL. */
3456 TRY_CATCH (except, RETURN_MASK_ERROR)
3458 new_val = evaluate_expression (var->root->exp);
3464 do_cleanups (back_to);
3469 static struct value *
3470 c_value_of_child (struct varobj *parent, int index)
3472 struct value *value = NULL;
3474 c_describe_child (parent, index, NULL, &value, NULL, NULL);
3478 static struct type *
3479 c_type_of_child (struct varobj *parent, int index)
3481 struct type *type = NULL;
3483 c_describe_child (parent, index, NULL, NULL, &type, NULL);
3488 c_value_of_variable (struct varobj *var, enum varobj_display_formats format)
3490 /* BOGUS: if val_print sees a struct/class, or a reference to one,
3491 it will print out its children instead of "{...}". So we need to
3492 catch that case explicitly. */
3493 struct type *type = get_type (var);
3495 /* Strip top-level references. */
3496 while (TYPE_CODE (type) == TYPE_CODE_REF)
3497 type = check_typedef (TYPE_TARGET_TYPE (type));
3499 switch (TYPE_CODE (type))
3501 case TYPE_CODE_STRUCT:
3502 case TYPE_CODE_UNION:
3503 return xstrdup ("{...}");
3506 case TYPE_CODE_ARRAY:
3510 number = xstrprintf ("[%d]", var->num_children);
3517 if (var->value == NULL)
3519 /* This can happen if we attempt to get the value of a struct
3520 member when the parent is an invalid pointer. This is an
3521 error condition, so we should tell the caller. */
3526 if (var->not_fetched && value_lazy (var->value))
3527 /* Frozen variable and no value yet. We don't
3528 implicitly fetch the value. MI response will
3529 use empty string for the value, which is OK. */
3532 gdb_assert (varobj_value_is_changeable_p (var));
3533 gdb_assert (!value_lazy (var->value));
3535 /* If the specified format is the current one,
3536 we can reuse print_value. */
3537 if (format == var->format)
3538 return xstrdup (var->print_value);
3540 return value_get_print_value (var->value, format, var);
3550 cplus_number_of_children (struct varobj *var)
3552 struct value *value = NULL;
3554 int children, dont_know;
3555 int lookup_actual_type = 0;
3556 struct value_print_options opts;
3561 get_user_print_options (&opts);
3563 if (!CPLUS_FAKE_CHILD (var))
3565 type = get_value_type (var);
3567 /* It is necessary to access a real type (via RTTI). */
3568 if (opts.objectprint)
3571 lookup_actual_type = (TYPE_CODE (var->type) == TYPE_CODE_REF
3572 || TYPE_CODE (var->type) == TYPE_CODE_PTR);
3574 adjust_value_for_child_access (&value, &type, NULL, lookup_actual_type);
3576 if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) ||
3577 ((TYPE_CODE (type)) == TYPE_CODE_UNION))
3581 cplus_class_num_children (type, kids);
3582 if (kids[v_public] != 0)
3584 if (kids[v_private] != 0)
3586 if (kids[v_protected] != 0)
3589 /* Add any baseclasses. */
3590 children += TYPE_N_BASECLASSES (type);
3593 /* FIXME: save children in var. */
3600 type = get_value_type (var->parent);
3602 /* It is necessary to access a real type (via RTTI). */
3603 if (opts.objectprint)
3605 struct varobj *parent = var->parent;
3607 value = parent->value;
3608 lookup_actual_type = (TYPE_CODE (parent->type) == TYPE_CODE_REF
3609 || TYPE_CODE (parent->type) == TYPE_CODE_PTR);
3611 adjust_value_for_child_access (&value, &type, NULL, lookup_actual_type);
3613 cplus_class_num_children (type, kids);
3614 if (strcmp (var->name, "public") == 0)
3615 children = kids[v_public];
3616 else if (strcmp (var->name, "private") == 0)
3617 children = kids[v_private];
3619 children = kids[v_protected];
3624 children = c_number_of_children (var);
3629 /* Compute # of public, private, and protected variables in this class.
3630 That means we need to descend into all baseclasses and find out
3631 how many are there, too. */
3633 cplus_class_num_children (struct type *type, int children[3])
3635 int i, vptr_fieldno;
3636 struct type *basetype = NULL;
3638 children[v_public] = 0;
3639 children[v_private] = 0;
3640 children[v_protected] = 0;
3642 vptr_fieldno = get_vptr_fieldno (type, &basetype);
3643 for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++)
3645 /* If we have a virtual table pointer, omit it. Even if virtual
3646 table pointers are not specifically marked in the debug info,
3647 they should be artificial. */
3648 if ((type == basetype && i == vptr_fieldno)
3649 || TYPE_FIELD_ARTIFICIAL (type, i))
3652 if (TYPE_FIELD_PROTECTED (type, i))
3653 children[v_protected]++;
3654 else if (TYPE_FIELD_PRIVATE (type, i))
3655 children[v_private]++;
3657 children[v_public]++;
3662 cplus_name_of_variable (struct varobj *parent)
3664 return c_name_of_variable (parent);
3667 enum accessibility { private_field, protected_field, public_field };
3669 /* Check if field INDEX of TYPE has the specified accessibility.
3670 Return 0 if so and 1 otherwise. */
3672 match_accessibility (struct type *type, int index, enum accessibility acc)
3674 if (acc == private_field && TYPE_FIELD_PRIVATE (type, index))
3676 else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index))
3678 else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index)
3679 && !TYPE_FIELD_PROTECTED (type, index))
3686 cplus_describe_child (struct varobj *parent, int index,
3687 char **cname, struct value **cvalue, struct type **ctype,
3688 char **cfull_expression)
3690 struct value *value;
3693 int lookup_actual_type = 0;
3694 char *parent_expression = NULL;
3696 struct value_print_options opts;
3704 if (cfull_expression)
3705 *cfull_expression = NULL;
3707 get_user_print_options (&opts);
3709 var = (CPLUS_FAKE_CHILD (parent)) ? parent->parent : parent;
3710 if (opts.objectprint)
3711 lookup_actual_type = (TYPE_CODE (var->type) == TYPE_CODE_REF
3712 || TYPE_CODE (var->type) == TYPE_CODE_PTR);
3714 type = get_value_type (var);
3715 if (cfull_expression)
3716 parent_expression = varobj_get_path_expr (get_path_expr_parent (var));
3718 adjust_value_for_child_access (&value, &type, &was_ptr, lookup_actual_type);
3720 if (TYPE_CODE (type) == TYPE_CODE_STRUCT
3721 || TYPE_CODE (type) == TYPE_CODE_UNION)
3723 char *join = was_ptr ? "->" : ".";
3725 if (CPLUS_FAKE_CHILD (parent))
3727 /* The fields of the class type are ordered as they
3728 appear in the class. We are given an index for a
3729 particular access control type ("public","protected",
3730 or "private"). We must skip over fields that don't
3731 have the access control we are looking for to properly
3732 find the indexed field. */
3733 int type_index = TYPE_N_BASECLASSES (type);
3734 enum accessibility acc = public_field;
3736 struct type *basetype = NULL;
3737 const char *field_name;
3739 vptr_fieldno = get_vptr_fieldno (type, &basetype);
3740 if (strcmp (parent->name, "private") == 0)
3741 acc = private_field;
3742 else if (strcmp (parent->name, "protected") == 0)
3743 acc = protected_field;
3747 if ((type == basetype && type_index == vptr_fieldno)
3748 || TYPE_FIELD_ARTIFICIAL (type, type_index))
3750 else if (match_accessibility (type, type_index, acc))
3756 /* If the type is anonymous and the field has no name,
3757 set an appopriate name. */
3758 field_name = TYPE_FIELD_NAME (type, type_index);
3759 if (field_name == NULL || *field_name == '\0')
3763 if (TYPE_CODE (TYPE_FIELD_TYPE (type, type_index))
3764 == TYPE_CODE_STRUCT)
3765 *cname = xstrdup (ANONYMOUS_STRUCT_NAME);
3766 else if (TYPE_CODE (TYPE_FIELD_TYPE (type, type_index))
3768 *cname = xstrdup (ANONYMOUS_UNION_NAME);
3771 if (cfull_expression)
3772 *cfull_expression = xstrdup ("");
3777 *cname = xstrdup (TYPE_FIELD_NAME (type, type_index));
3779 if (cfull_expression)
3781 = xstrprintf ("((%s)%s%s)", parent_expression, join,
3785 if (cvalue && value)
3786 *cvalue = value_struct_element_index (value, type_index);
3789 *ctype = TYPE_FIELD_TYPE (type, type_index);
3791 else if (index < TYPE_N_BASECLASSES (type))
3793 /* This is a baseclass. */
3795 *cname = xstrdup (TYPE_FIELD_NAME (type, index));
3797 if (cvalue && value)
3798 *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value);
3802 *ctype = TYPE_FIELD_TYPE (type, index);
3805 if (cfull_expression)
3807 char *ptr = was_ptr ? "*" : "";
3809 /* Cast the parent to the base' type. Note that in gdb,
3812 will create an lvalue, for all appearences, so we don't
3813 need to use more fancy:
3817 When we are in the scope of the base class or of one
3818 of its children, the type field name will be interpreted
3819 as a constructor, if it exists. Therefore, we must
3820 indicate that the name is a class name by using the
3821 'class' keyword. See PR mi/11912 */
3822 *cfull_expression = xstrprintf ("(%s(class %s%s) %s)",
3824 TYPE_FIELD_NAME (type, index),
3831 char *access = NULL;
3834 cplus_class_num_children (type, children);
3836 /* Everything beyond the baseclasses can
3837 only be "public", "private", or "protected"
3839 The special "fake" children are always output by varobj in
3840 this order. So if INDEX == 2, it MUST be "protected". */
3841 index -= TYPE_N_BASECLASSES (type);
3845 if (children[v_public] > 0)
3847 else if (children[v_private] > 0)
3850 access = "protected";
3853 if (children[v_public] > 0)
3855 if (children[v_private] > 0)
3858 access = "protected";
3860 else if (children[v_private] > 0)
3861 access = "protected";
3864 /* Must be protected. */
3865 access = "protected";
3872 gdb_assert (access);
3874 *cname = xstrdup (access);
3876 /* Value and type and full expression are null here. */
3881 c_describe_child (parent, index, cname, cvalue, ctype, cfull_expression);
3886 cplus_name_of_child (struct varobj *parent, int index)
3890 cplus_describe_child (parent, index, &name, NULL, NULL, NULL);
3895 cplus_path_expr_of_child (struct varobj *child)
3897 cplus_describe_child (child->parent, child->index, NULL, NULL, NULL,
3899 return child->path_expr;
3902 static struct value *
3903 cplus_value_of_root (struct varobj **var_handle)
3905 return c_value_of_root (var_handle);
3908 static struct value *
3909 cplus_value_of_child (struct varobj *parent, int index)
3911 struct value *value = NULL;
3913 cplus_describe_child (parent, index, NULL, &value, NULL, NULL);
3917 static struct type *
3918 cplus_type_of_child (struct varobj *parent, int index)
3920 struct type *type = NULL;
3922 cplus_describe_child (parent, index, NULL, NULL, &type, NULL);
3927 cplus_value_of_variable (struct varobj *var,
3928 enum varobj_display_formats format)
3931 /* If we have one of our special types, don't print out
3933 if (CPLUS_FAKE_CHILD (var))
3934 return xstrdup ("");
3936 return c_value_of_variable (var, format);
3942 java_number_of_children (struct varobj *var)
3944 return cplus_number_of_children (var);
3948 java_name_of_variable (struct varobj *parent)
3952 name = cplus_name_of_variable (parent);
3953 /* If the name has "-" in it, it is because we
3954 needed to escape periods in the name... */
3957 while (*p != '\000')
3968 java_name_of_child (struct varobj *parent, int index)
3972 name = cplus_name_of_child (parent, index);
3973 /* Escape any periods in the name... */
3976 while (*p != '\000')
3987 java_path_expr_of_child (struct varobj *child)
3992 static struct value *
3993 java_value_of_root (struct varobj **var_handle)
3995 return cplus_value_of_root (var_handle);
3998 static struct value *
3999 java_value_of_child (struct varobj *parent, int index)
4001 return cplus_value_of_child (parent, index);
4004 static struct type *
4005 java_type_of_child (struct varobj *parent, int index)
4007 return cplus_type_of_child (parent, index);
4011 java_value_of_variable (struct varobj *var, enum varobj_display_formats format)
4013 return cplus_value_of_variable (var, format);
4016 /* Ada specific callbacks for VAROBJs. */
4019 ada_number_of_children (struct varobj *var)
4021 return ada_varobj_get_number_of_children (var->value, var->type);
4025 ada_name_of_variable (struct varobj *parent)
4027 return c_name_of_variable (parent);
4031 ada_name_of_child (struct varobj *parent, int index)
4033 return ada_varobj_get_name_of_child (parent->value, parent->type,
4034 parent->name, index);
4038 ada_path_expr_of_child (struct varobj *child)
4040 struct varobj *parent = child->parent;
4041 const char *parent_path_expr = varobj_get_path_expr (parent);
4043 return ada_varobj_get_path_expr_of_child (parent->value,
4050 static struct value *
4051 ada_value_of_root (struct varobj **var_handle)
4053 return c_value_of_root (var_handle);
4056 static struct value *
4057 ada_value_of_child (struct varobj *parent, int index)
4059 return ada_varobj_get_value_of_child (parent->value, parent->type,
4060 parent->name, index);
4063 static struct type *
4064 ada_type_of_child (struct varobj *parent, int index)
4066 return ada_varobj_get_type_of_child (parent->value, parent->type,
4071 ada_value_of_variable (struct varobj *var, enum varobj_display_formats format)
4073 struct value_print_options opts;
4075 get_formatted_print_options (&opts, format_code[(int) format]);
4079 return ada_varobj_get_value_of_variable (var->value, var->type, &opts);
4082 /* Implement the "value_is_changeable_p" routine for Ada. */
4085 ada_value_is_changeable_p (struct varobj *var)
4087 struct type *type = var->value ? value_type (var->value) : var->type;
4089 if (ada_is_array_descriptor_type (type)
4090 && TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
4092 /* This is in reality a pointer to an unconstrained array.
4093 its value is changeable. */
4097 if (ada_is_string_type (type))
4099 /* We display the contents of the string in the array's
4100 "value" field. The contents can change, so consider
4101 that the array is changeable. */
4105 return default_value_is_changeable_p (var);
4108 /* Implement the "value_has_mutated" routine for Ada. */
4111 ada_value_has_mutated (struct varobj *var, struct value *new_val,
4112 struct type *new_type)
4118 /* If the number of fields have changed, then for sure the type
4120 if (ada_varobj_get_number_of_children (new_val, new_type)
4121 != var->num_children)
4124 /* If the number of fields have remained the same, then we need
4125 to check the name of each field. If they remain the same,
4126 then chances are the type hasn't mutated. This is technically
4127 an incomplete test, as the child's type might have changed
4128 despite the fact that the name remains the same. But we'll
4129 handle this situation by saying that the child has mutated,
4132 If only part (or none!) of the children have been fetched,
4133 then only check the ones we fetched. It does not matter
4134 to the frontend whether a child that it has not fetched yet
4135 has mutated or not. So just assume it hasn't. */
4137 restrict_range (var->children, &from, &to);
4138 for (i = from; i < to; i++)
4139 if (strcmp (ada_varobj_get_name_of_child (new_val, new_type,
4141 VEC_index (varobj_p, var->children, i)->name) != 0)
4147 /* Iterate all the existing _root_ VAROBJs and call the FUNC callback for them
4148 with an arbitrary caller supplied DATA pointer. */
4151 all_root_varobjs (void (*func) (struct varobj *var, void *data), void *data)
4153 struct varobj_root *var_root, *var_root_next;
4155 /* Iterate "safely" - handle if the callee deletes its passed VAROBJ. */
4157 for (var_root = rootlist; var_root != NULL; var_root = var_root_next)
4159 var_root_next = var_root->next;
4161 (*func) (var_root->rootvar, data);
4165 extern void _initialize_varobj (void);
4167 _initialize_varobj (void)
4169 int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE;
4171 varobj_table = xmalloc (sizeof_table);
4172 memset (varobj_table, 0, sizeof_table);
4174 add_setshow_zuinteger_cmd ("debugvarobj", class_maintenance,
4176 _("Set varobj debugging."),
4177 _("Show varobj debugging."),
4178 _("When non-zero, varobj debugging is enabled."),
4179 NULL, show_varobjdebug,
4180 &setlist, &showlist);
4183 /* Invalidate varobj VAR if it is tied to locals and re-create it if it is
4184 defined on globals. It is a helper for varobj_invalidate.
4186 This function is called after changing the symbol file, in this case the
4187 pointers to "struct type" stored by the varobj are no longer valid. All
4188 varobj must be either re-evaluated, or marked as invalid here. */
4191 varobj_invalidate_iter (struct varobj *var, void *unused)
4193 /* global and floating var must be re-evaluated. */
4194 if (var->root->floating || var->root->valid_block == NULL)
4196 struct varobj *tmp_var;
4198 /* Try to create a varobj with same expression. If we succeed
4199 replace the old varobj, otherwise invalidate it. */
4200 tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0,
4202 if (tmp_var != NULL)
4204 tmp_var->obj_name = xstrdup (var->obj_name);
4205 varobj_delete (var, NULL, 0);
4206 install_variable (tmp_var);
4209 var->root->is_valid = 0;
4211 else /* locals must be invalidated. */
4212 var->root->is_valid = 0;
4215 /* Invalidate the varobjs that are tied to locals and re-create the ones that
4216 are defined on globals.
4217 Invalidated varobjs will be always printed in_scope="invalid". */
4220 varobj_invalidate (void)
4222 all_root_varobjs (varobj_invalidate_iter, NULL);