1 /* Implementation of the GDB variable objects API.
3 Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
4 2009 Free Software Foundation, Inc.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #include "exceptions.h"
22 #include "expression.h"
30 #include "gdb_assert.h"
31 #include "gdb_string.h"
35 #include "gdbthread.h"
37 #include "typeprint.h"
40 #include "python/python.h"
41 #include "python/python-internal.h"
46 /* Non-zero if we want to see trace of varobj level stuff. */
50 show_varobjdebug (struct ui_file *file, int from_tty,
51 struct cmd_list_element *c, const char *value)
53 fprintf_filtered (file, _("Varobj debugging is %s.\n"), value);
56 /* String representations of gdb's format codes */
57 char *varobj_format_string[] =
58 { "natural", "binary", "decimal", "hexadecimal", "octal" };
60 /* String representations of gdb's known languages */
61 char *varobj_language_string[] = { "unknown", "C", "C++", "Java" };
65 /* Every root variable has one of these structures saved in its
66 varobj. Members which must be free'd are noted. */
70 /* Alloc'd expression for this parent. */
71 struct expression *exp;
73 /* Block for which this expression is valid */
74 struct block *valid_block;
76 /* The frame for this expression. This field is set iff valid_block is
78 struct frame_id frame;
80 /* The thread ID that this varobj_root belong to. This field
81 is only valid if valid_block is not NULL.
82 When not 0, indicates which thread 'frame' belongs to.
83 When 0, indicates that the thread list was empty when the varobj_root
87 /* If 1, the -var-update always recomputes the value in the
88 current thread and frame. Otherwise, variable object is
89 always updated in the specific scope/thread/frame */
92 /* Flag that indicates validity: set to 0 when this varobj_root refers
93 to symbols that do not exist anymore. */
96 /* Language info for this variable and its children */
97 struct language_specific *lang;
99 /* The varobj for this root node. */
100 struct varobj *rootvar;
102 /* Next root variable */
103 struct varobj_root *next;
106 /* Every variable in the system has a structure of this type defined
107 for it. This structure holds all information necessary to manipulate
108 a particular object variable. Members which must be freed are noted. */
112 /* Alloc'd name of the variable for this object.. If this variable is a
113 child, then this name will be the child's source name.
114 (bar, not foo.bar) */
115 /* NOTE: This is the "expression" */
118 /* Alloc'd expression for this child. Can be used to create a
119 root variable corresponding to this child. */
122 /* The alloc'd name for this variable's object. This is here for
123 convenience when constructing this object's children. */
126 /* Index of this variable in its parent or -1 */
129 /* The type of this variable. This can be NULL
130 for artifial variable objects -- currently, the "accessibility"
131 variable objects in C++. */
134 /* The value of this expression or subexpression. A NULL value
135 indicates there was an error getting this value.
136 Invariant: if varobj_value_is_changeable_p (this) is non-zero,
137 the value is either NULL, or not lazy. */
140 /* The number of (immediate) children this variable has */
143 /* If this object is a child, this points to its immediate parent. */
144 struct varobj *parent;
146 /* Children of this object. */
147 VEC (varobj_p) *children;
149 /* Whether the children of this varobj were requested. This field is
150 used to decide if dynamic varobj should recompute their children.
151 In the event that the frontend never asked for the children, we
153 int children_requested;
155 /* Description of the root variable. Points to root variable for children. */
156 struct varobj_root *root;
158 /* The format of the output for this object */
159 enum varobj_display_formats format;
161 /* Was this variable updated via a varobj_set_value operation */
164 /* Last print value. */
167 /* Is this variable frozen. Frozen variables are never implicitly
168 updated by -var-update *
169 or -var-update <direct-or-indirect-parent>. */
172 /* Is the value of this variable intentionally not fetched? It is
173 not fetched if either the variable is frozen, or any parents is
177 /* The pretty-printer that has been constructed. If NULL, then a
178 new printer object is needed, and one will be constructed. */
179 PyObject *pretty_printer;
185 struct cpstack *next;
188 /* A list of varobjs */
196 /* Private function prototypes */
198 /* Helper functions for the above subcommands. */
200 static int delete_variable (struct cpstack **, struct varobj *, int);
202 static void delete_variable_1 (struct cpstack **, int *,
203 struct varobj *, int, int);
205 static int install_variable (struct varobj *);
207 static void uninstall_variable (struct varobj *);
209 static struct varobj *create_child (struct varobj *, int, char *);
211 static struct varobj *
212 create_child_with_value (struct varobj *parent, int index, const char *name,
213 struct value *value);
215 /* Utility routines */
217 static struct varobj *new_variable (void);
219 static struct varobj *new_root_variable (void);
221 static void free_variable (struct varobj *var);
223 static struct cleanup *make_cleanup_free_variable (struct varobj *var);
225 static struct type *get_type (struct varobj *var);
227 static struct type *get_value_type (struct varobj *var);
229 static struct type *get_target_type (struct type *);
231 static enum varobj_display_formats variable_default_display (struct varobj *);
233 static void cppush (struct cpstack **pstack, char *name);
235 static char *cppop (struct cpstack **pstack);
237 static int install_new_value (struct varobj *var, struct value *value,
240 static void install_default_visualizer (struct varobj *var);
242 /* Language-specific routines. */
244 static enum varobj_languages variable_language (struct varobj *var);
246 static int number_of_children (struct varobj *);
248 static char *name_of_variable (struct varobj *);
250 static char *name_of_child (struct varobj *, int);
252 static struct value *value_of_root (struct varobj **var_handle, int *);
254 static struct value *value_of_child (struct varobj *parent, int index);
256 static char *my_value_of_variable (struct varobj *var,
257 enum varobj_display_formats format);
259 static char *value_get_print_value (struct value *value,
260 enum varobj_display_formats format,
263 static int varobj_value_is_changeable_p (struct varobj *var);
265 static int is_root_p (struct varobj *var);
267 static struct varobj *
268 varobj_add_child (struct varobj *var, const char *name, struct value *value);
270 /* C implementation */
272 static int c_number_of_children (struct varobj *var);
274 static char *c_name_of_variable (struct varobj *parent);
276 static char *c_name_of_child (struct varobj *parent, int index);
278 static char *c_path_expr_of_child (struct varobj *child);
280 static struct value *c_value_of_root (struct varobj **var_handle);
282 static struct value *c_value_of_child (struct varobj *parent, int index);
284 static struct type *c_type_of_child (struct varobj *parent, int index);
286 static char *c_value_of_variable (struct varobj *var,
287 enum varobj_display_formats format);
289 /* C++ implementation */
291 static int cplus_number_of_children (struct varobj *var);
293 static void cplus_class_num_children (struct type *type, int children[3]);
295 static char *cplus_name_of_variable (struct varobj *parent);
297 static char *cplus_name_of_child (struct varobj *parent, int index);
299 static char *cplus_path_expr_of_child (struct varobj *child);
301 static struct value *cplus_value_of_root (struct varobj **var_handle);
303 static struct value *cplus_value_of_child (struct varobj *parent, int index);
305 static struct type *cplus_type_of_child (struct varobj *parent, int index);
307 static char *cplus_value_of_variable (struct varobj *var,
308 enum varobj_display_formats format);
310 /* Java implementation */
312 static int java_number_of_children (struct varobj *var);
314 static char *java_name_of_variable (struct varobj *parent);
316 static char *java_name_of_child (struct varobj *parent, int index);
318 static char *java_path_expr_of_child (struct varobj *child);
320 static struct value *java_value_of_root (struct varobj **var_handle);
322 static struct value *java_value_of_child (struct varobj *parent, int index);
324 static struct type *java_type_of_child (struct varobj *parent, int index);
326 static char *java_value_of_variable (struct varobj *var,
327 enum varobj_display_formats format);
329 /* The language specific vector */
331 struct language_specific
334 /* The language of this variable */
335 enum varobj_languages language;
337 /* The number of children of PARENT. */
338 int (*number_of_children) (struct varobj * parent);
340 /* The name (expression) of a root varobj. */
341 char *(*name_of_variable) (struct varobj * parent);
343 /* The name of the INDEX'th child of PARENT. */
344 char *(*name_of_child) (struct varobj * parent, int index);
346 /* Returns the rooted expression of CHILD, which is a variable
347 obtain that has some parent. */
348 char *(*path_expr_of_child) (struct varobj * child);
350 /* The ``struct value *'' of the root variable ROOT. */
351 struct value *(*value_of_root) (struct varobj ** root_handle);
353 /* The ``struct value *'' of the INDEX'th child of PARENT. */
354 struct value *(*value_of_child) (struct varobj * parent, int index);
356 /* The type of the INDEX'th child of PARENT. */
357 struct type *(*type_of_child) (struct varobj * parent, int index);
359 /* The current value of VAR. */
360 char *(*value_of_variable) (struct varobj * var,
361 enum varobj_display_formats format);
364 /* Array of known source language routines. */
365 static struct language_specific languages[vlang_end] = {
366 /* Unknown (try treating as C */
369 c_number_of_children,
372 c_path_expr_of_child,
381 c_number_of_children,
384 c_path_expr_of_child,
393 cplus_number_of_children,
394 cplus_name_of_variable,
396 cplus_path_expr_of_child,
398 cplus_value_of_child,
400 cplus_value_of_variable}
405 java_number_of_children,
406 java_name_of_variable,
408 java_path_expr_of_child,
412 java_value_of_variable}
415 /* A little convenience enum for dealing with C++/Java */
418 v_public = 0, v_private, v_protected
423 /* Mappings of varobj_display_formats enums to gdb's format codes */
424 static int format_code[] = { 0, 't', 'd', 'x', 'o' };
426 /* Header of the list of root variable objects */
427 static struct varobj_root *rootlist;
428 static int rootcount = 0; /* number of root varobjs in the list */
430 /* Prime number indicating the number of buckets in the hash table */
431 /* A prime large enough to avoid too many colisions */
432 #define VAROBJ_TABLE_SIZE 227
434 /* Pointer to the varobj hash table (built at run time) */
435 static struct vlist **varobj_table;
437 /* Is the variable X one of our "fake" children? */
438 #define CPLUS_FAKE_CHILD(x) \
439 ((x) != NULL && (x)->type == NULL && (x)->value == NULL)
442 /* API Implementation */
444 is_root_p (struct varobj *var)
446 return (var->root->rootvar == var);
450 /* Helper function to install a Python environment suitable for
451 use during operations on VAR. */
453 varobj_ensure_python_env (struct varobj *var)
455 return ensure_python_env (var->root->exp->gdbarch,
456 var->root->exp->language_defn);
460 /* Creates a varobj (not its children) */
462 /* Return the full FRAME which corresponds to the given CORE_ADDR
463 or NULL if no FRAME on the chain corresponds to CORE_ADDR. */
465 static struct frame_info *
466 find_frame_addr_in_frame_chain (CORE_ADDR frame_addr)
468 struct frame_info *frame = NULL;
470 if (frame_addr == (CORE_ADDR) 0)
473 for (frame = get_current_frame ();
475 frame = get_prev_frame (frame))
477 /* The CORE_ADDR we get as argument was parsed from a string GDB
478 output as $fp. This output got truncated to gdbarch_addr_bit.
479 Truncate the frame base address in the same manner before
480 comparing it against our argument. */
481 CORE_ADDR frame_base = get_frame_base_address (frame);
482 int addr_bit = gdbarch_addr_bit (get_frame_arch (frame));
483 if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))
484 frame_base &= ((CORE_ADDR) 1 << addr_bit) - 1;
486 if (frame_base == frame_addr)
494 varobj_create (char *objname,
495 char *expression, CORE_ADDR frame, enum varobj_type type)
498 struct frame_info *fi;
499 struct frame_info *old_fi = NULL;
501 struct cleanup *old_chain;
503 /* Fill out a varobj structure for the (root) variable being constructed. */
504 var = new_root_variable ();
505 old_chain = make_cleanup_free_variable (var);
507 if (expression != NULL)
510 enum varobj_languages lang;
511 struct value *value = NULL;
513 /* Parse and evaluate the expression, filling in as much of the
514 variable's data as possible. */
516 if (has_stack_frames ())
518 /* Allow creator to specify context of variable */
519 if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME))
520 fi = get_selected_frame (NULL);
522 /* FIXME: cagney/2002-11-23: This code should be doing a
523 lookup using the frame ID and not just the frame's
524 ``address''. This, of course, means an interface
525 change. However, with out that interface change ISAs,
526 such as the ia64 with its two stacks, won't work.
527 Similar goes for the case where there is a frameless
529 fi = find_frame_addr_in_frame_chain (frame);
534 /* frame = -2 means always use selected frame */
535 if (type == USE_SELECTED_FRAME)
536 var->root->floating = 1;
540 block = get_frame_block (fi, 0);
543 innermost_block = NULL;
544 /* Wrap the call to parse expression, so we can
545 return a sensible error. */
546 if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp))
551 /* Don't allow variables to be created for types. */
552 if (var->root->exp->elts[0].opcode == OP_TYPE)
554 do_cleanups (old_chain);
555 fprintf_unfiltered (gdb_stderr, "Attempt to use a type name"
556 " as an expression.\n");
560 var->format = variable_default_display (var);
561 var->root->valid_block = innermost_block;
562 var->name = xstrdup (expression);
563 /* For a root var, the name and the expr are the same. */
564 var->path_expr = xstrdup (expression);
566 /* When the frame is different from the current frame,
567 we must select the appropriate frame before parsing
568 the expression, otherwise the value will not be current.
569 Since select_frame is so benign, just call it for all cases. */
570 if (innermost_block && fi != NULL)
572 var->root->frame = get_frame_id (fi);
573 var->root->thread_id = pid_to_thread_id (inferior_ptid);
574 old_fi = get_selected_frame (NULL);
578 /* We definitely need to catch errors here.
579 If evaluate_expression succeeds we got the value we wanted.
580 But if it fails, we still go on with a call to evaluate_type() */
581 if (!gdb_evaluate_expression (var->root->exp, &value))
583 /* Error getting the value. Try to at least get the
585 struct value *type_only_value = evaluate_type (var->root->exp);
586 var->type = value_type (type_only_value);
589 var->type = value_type (value);
591 install_new_value (var, value, 1 /* Initial assignment */);
593 /* Set language info */
594 lang = variable_language (var);
595 var->root->lang = &languages[lang];
597 /* Set ourselves as our root */
598 var->root->rootvar = var;
600 /* Reset the selected frame */
602 select_frame (old_fi);
605 /* If the variable object name is null, that means this
606 is a temporary variable, so don't install it. */
608 if ((var != NULL) && (objname != NULL))
610 var->obj_name = xstrdup (objname);
612 /* If a varobj name is duplicated, the install will fail so
614 if (!install_variable (var))
616 do_cleanups (old_chain);
621 install_default_visualizer (var);
622 discard_cleanups (old_chain);
626 /* Generates an unique name that can be used for a varobj */
629 varobj_gen_name (void)
634 /* generate a name for this object */
636 obj_name = xstrprintf ("var%d", id);
641 /* Given an OBJNAME, returns the pointer to the corresponding varobj. Call
642 error if OBJNAME cannot be found. */
645 varobj_get_handle (char *objname)
649 unsigned int index = 0;
652 for (chp = objname; *chp; chp++)
654 index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE;
657 cv = *(varobj_table + index);
658 while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0))
662 error (_("Variable object not found"));
667 /* Given the handle, return the name of the object */
670 varobj_get_objname (struct varobj *var)
672 return var->obj_name;
675 /* Given the handle, return the expression represented by the object */
678 varobj_get_expression (struct varobj *var)
680 return name_of_variable (var);
683 /* Deletes a varobj and all its children if only_children == 0,
684 otherwise deletes only the children; returns a malloc'ed list of all the
685 (malloc'ed) names of the variables that have been deleted (NULL terminated) */
688 varobj_delete (struct varobj *var, char ***dellist, int only_children)
692 struct cpstack *result = NULL;
695 /* Initialize a stack for temporary results */
696 cppush (&result, NULL);
699 /* Delete only the variable children */
700 delcount = delete_variable (&result, var, 1 /* only the children */ );
702 /* Delete the variable and all its children */
703 delcount = delete_variable (&result, var, 0 /* parent+children */ );
705 /* We may have been asked to return a list of what has been deleted */
708 *dellist = xmalloc ((delcount + 1) * sizeof (char *));
712 *cp = cppop (&result);
713 while ((*cp != NULL) && (mycount > 0))
717 *cp = cppop (&result);
720 if (mycount || (*cp != NULL))
721 warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"),
728 /* Convenience function for varobj_set_visualizer. Instantiate a
729 pretty-printer for a given value. */
731 instantiate_pretty_printer (PyObject *constructor, struct value *value)
734 PyObject *val_obj = NULL;
736 volatile struct gdb_exception except;
738 TRY_CATCH (except, RETURN_MASK_ALL)
740 value = value_copy (value);
742 GDB_PY_HANDLE_EXCEPTION (except);
743 val_obj = value_to_value_object (value);
748 printer = PyObject_CallFunctionObjArgs (constructor, val_obj, NULL);
755 /* Set/Get variable object display format */
757 enum varobj_display_formats
758 varobj_set_display_format (struct varobj *var,
759 enum varobj_display_formats format)
766 case FORMAT_HEXADECIMAL:
768 var->format = format;
772 var->format = variable_default_display (var);
775 if (varobj_value_is_changeable_p (var)
776 && var->value && !value_lazy (var->value))
778 xfree (var->print_value);
779 var->print_value = value_get_print_value (var->value, var->format, var);
785 enum varobj_display_formats
786 varobj_get_display_format (struct varobj *var)
792 varobj_get_display_hint (struct varobj *var)
797 struct cleanup *back_to = varobj_ensure_python_env (var);
799 if (var->pretty_printer)
800 result = gdbpy_get_display_hint (var->pretty_printer);
802 do_cleanups (back_to);
808 /* If the variable object is bound to a specific thread, that
809 is its evaluation can always be done in context of a frame
810 inside that thread, returns GDB id of the thread -- which
811 is always positive. Otherwise, returns -1. */
813 varobj_get_thread_id (struct varobj *var)
815 if (var->root->valid_block && var->root->thread_id > 0)
816 return var->root->thread_id;
822 varobj_set_frozen (struct varobj *var, int frozen)
824 /* When a variable is unfrozen, we don't fetch its value.
825 The 'not_fetched' flag remains set, so next -var-update
828 We don't fetch the value, because for structures the client
829 should do -var-update anyway. It would be bad to have different
830 client-size logic for structure and other types. */
831 var->frozen = frozen;
835 varobj_get_frozen (struct varobj *var)
841 update_dynamic_varobj_children (struct varobj *var,
842 VEC (varobj_p) **changed,
843 VEC (varobj_p) **new_and_unchanged,
848 /* FIXME: we *might* want to provide this functionality as
849 a standalone function, so that other interested parties
850 than varobj code can benefit for this. */
851 struct cleanup *back_to;
855 int children_changed = 0;
856 PyObject *printer = var->pretty_printer;
858 back_to = varobj_ensure_python_env (var);
861 if (!PyObject_HasAttr (printer, gdbpy_children_cst))
863 do_cleanups (back_to);
867 children = PyObject_CallMethodObjArgs (printer, gdbpy_children_cst,
872 gdbpy_print_stack ();
873 error (_("Null value returned for children"));
876 make_cleanup_py_decref (children);
878 if (!PyIter_Check (children))
879 error (_("Returned value is not iterable"));
881 iterator = PyObject_GetIter (children);
884 gdbpy_print_stack ();
885 error (_("Could not get children iterator"));
887 make_cleanup_py_decref (iterator);
891 PyObject *item = PyIter_Next (iterator);
895 struct cleanup *inner;
899 inner = make_cleanup_py_decref (item);
901 if (!PyArg_ParseTuple (item, "sO", &name, &py_v))
902 error (_("Invalid item from the child list"));
904 if (PyObject_TypeCheck (py_v, &value_object_type))
906 /* If we just call convert_value_from_python for this type,
907 we won't know who owns the result. For this one case we
908 need to copy the resulting value. */
909 v = value_object_to_value (py_v);
913 v = convert_value_from_python (py_v);
915 /* TODO: This assume the name of the i-th child never changes. */
917 /* Now see what to do here. */
918 if (VEC_length (varobj_p, var->children) < i + 1)
920 /* There's no child yet. */
921 struct varobj *child = varobj_add_child (var, name, v);
922 if (new_and_unchanged)
923 VEC_safe_push (varobj_p, *new_and_unchanged, child);
924 children_changed = 1;
928 varobj_p existing = VEC_index (varobj_p, var->children, i);
929 if (install_new_value (existing, v, 0) && changed)
932 VEC_safe_push (varobj_p, *changed, existing);
936 if (new_and_unchanged)
937 VEC_safe_push (varobj_p, *new_and_unchanged, existing);
944 if (i < VEC_length (varobj_p, var->children))
947 children_changed = 1;
948 for (i = 0; i < VEC_length (varobj_p, var->children); ++i)
949 varobj_delete (VEC_index (varobj_p, var->children, i), NULL, 0);
951 VEC_truncate (varobj_p, var->children, i);
952 var->num_children = VEC_length (varobj_p, var->children);
954 do_cleanups (back_to);
956 *cchanged = children_changed;
959 gdb_assert (0 && "should never be called if Python is not enabled");
964 varobj_get_num_children (struct varobj *var)
966 if (var->num_children == -1)
969 if (!var->pretty_printer
970 || !update_dynamic_varobj_children (var, NULL, NULL, &changed))
971 var->num_children = number_of_children (var);
974 return var->num_children;
977 /* Creates a list of the immediate children of a variable object;
978 the return code is the number of such children or -1 on error */
981 varobj_list_children (struct varobj *var)
983 struct varobj *child;
985 int i, children_changed;
987 var->children_requested = 1;
989 if (var->pretty_printer
990 /* This, in theory, can result in the number of children changing without
991 frontend noticing. But well, calling -var-list-children on the same
992 varobj twice is not something a sane frontend would do. */
993 && update_dynamic_varobj_children (var, NULL, NULL, &children_changed))
994 return var->children;
996 if (var->num_children == -1)
997 var->num_children = number_of_children (var);
999 /* If that failed, give up. */
1000 if (var->num_children == -1)
1001 return var->children;
1003 /* If we're called when the list of children is not yet initialized,
1004 allocate enough elements in it. */
1005 while (VEC_length (varobj_p, var->children) < var->num_children)
1006 VEC_safe_push (varobj_p, var->children, NULL);
1008 for (i = 0; i < var->num_children; i++)
1010 varobj_p existing = VEC_index (varobj_p, var->children, i);
1012 if (existing == NULL)
1014 /* Either it's the first call to varobj_list_children for
1015 this variable object, and the child was never created,
1016 or it was explicitly deleted by the client. */
1017 name = name_of_child (var, i);
1018 existing = create_child (var, i, name);
1019 VEC_replace (varobj_p, var->children, i, existing);
1020 install_default_visualizer (existing);
1024 return var->children;
1027 static struct varobj *
1028 varobj_add_child (struct varobj *var, const char *name, struct value *value)
1030 varobj_p v = create_child_with_value (var,
1031 VEC_length (varobj_p, var->children),
1033 VEC_safe_push (varobj_p, var->children, v);
1034 install_default_visualizer (v);
1038 /* Obtain the type of an object Variable as a string similar to the one gdb
1039 prints on the console */
1042 varobj_get_type (struct varobj *var)
1044 /* For the "fake" variables, do not return a type. (It's type is
1046 Do not return a type for invalid variables as well. */
1047 if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid)
1050 return type_to_string (var->type);
1053 /* Obtain the type of an object variable. */
1056 varobj_get_gdb_type (struct varobj *var)
1061 /* Return a pointer to the full rooted expression of varobj VAR.
1062 If it has not been computed yet, compute it. */
1064 varobj_get_path_expr (struct varobj *var)
1066 if (var->path_expr != NULL)
1067 return var->path_expr;
1070 /* For root varobjs, we initialize path_expr
1071 when creating varobj, so here it should be
1073 gdb_assert (!is_root_p (var));
1074 return (*var->root->lang->path_expr_of_child) (var);
1078 enum varobj_languages
1079 varobj_get_language (struct varobj *var)
1081 return variable_language (var);
1085 varobj_get_attributes (struct varobj *var)
1089 if (varobj_editable_p (var))
1090 /* FIXME: define masks for attributes */
1091 attributes |= 0x00000001; /* Editable */
1097 varobj_get_formatted_value (struct varobj *var,
1098 enum varobj_display_formats format)
1100 return my_value_of_variable (var, format);
1104 varobj_get_value (struct varobj *var)
1106 return my_value_of_variable (var, var->format);
1109 /* Set the value of an object variable (if it is editable) to the
1110 value of the given expression */
1111 /* Note: Invokes functions that can call error() */
1114 varobj_set_value (struct varobj *var, char *expression)
1120 /* The argument "expression" contains the variable's new value.
1121 We need to first construct a legal expression for this -- ugh! */
1122 /* Does this cover all the bases? */
1123 struct expression *exp;
1124 struct value *value;
1125 int saved_input_radix = input_radix;
1126 char *s = expression;
1129 gdb_assert (varobj_editable_p (var));
1131 input_radix = 10; /* ALWAYS reset to decimal temporarily */
1132 exp = parse_exp_1 (&s, 0, 0);
1133 if (!gdb_evaluate_expression (exp, &value))
1135 /* We cannot proceed without a valid expression. */
1140 /* All types that are editable must also be changeable. */
1141 gdb_assert (varobj_value_is_changeable_p (var));
1143 /* The value of a changeable variable object must not be lazy. */
1144 gdb_assert (!value_lazy (var->value));
1146 /* Need to coerce the input. We want to check if the
1147 value of the variable object will be different
1148 after assignment, and the first thing value_assign
1149 does is coerce the input.
1150 For example, if we are assigning an array to a pointer variable we
1151 should compare the pointer with the the array's address, not with the
1153 value = coerce_array (value);
1155 /* The new value may be lazy. gdb_value_assign, or
1156 rather value_contents, will take care of this.
1157 If fetching of the new value will fail, gdb_value_assign
1158 with catch the exception. */
1159 if (!gdb_value_assign (var->value, value, &val))
1162 /* If the value has changed, record it, so that next -var-update can
1163 report this change. If a variable had a value of '1', we've set it
1164 to '333' and then set again to '1', when -var-update will report this
1165 variable as changed -- because the first assignment has set the
1166 'updated' flag. There's no need to optimize that, because return value
1167 of -var-update should be considered an approximation. */
1168 var->updated = install_new_value (var, val, 0 /* Compare values. */);
1169 input_radix = saved_input_radix;
1173 /* Returns a malloc'ed list with all root variable objects */
1175 varobj_list (struct varobj ***varlist)
1178 struct varobj_root *croot;
1179 int mycount = rootcount;
1181 /* Alloc (rootcount + 1) entries for the result */
1182 *varlist = xmalloc ((rootcount + 1) * sizeof (struct varobj *));
1186 while ((croot != NULL) && (mycount > 0))
1188 *cv = croot->rootvar;
1191 croot = croot->next;
1193 /* Mark the end of the list */
1196 if (mycount || (croot != NULL))
1198 ("varobj_list: assertion failed - wrong tally of root vars (%d:%d)",
1199 rootcount, mycount);
1204 /* Assign a new value to a variable object. If INITIAL is non-zero,
1205 this is the first assignement after the variable object was just
1206 created, or changed type. In that case, just assign the value
1208 Otherwise, assign the new value, and return 1 if the value is different
1209 from the current one, 0 otherwise. The comparison is done on textual
1210 representation of value. Therefore, some types need not be compared. E.g.
1211 for structures the reported value is always "{...}", so no comparison is
1212 necessary here. If the old value was NULL and new one is not, or vice versa,
1215 The VALUE parameter should not be released -- the function will
1216 take care of releasing it when needed. */
1218 install_new_value (struct varobj *var, struct value *value, int initial)
1223 int intentionally_not_fetched = 0;
1224 char *print_value = NULL;
1226 /* We need to know the varobj's type to decide if the value should
1227 be fetched or not. C++ fake children (public/protected/private) don't have
1229 gdb_assert (var->type || CPLUS_FAKE_CHILD (var));
1230 changeable = varobj_value_is_changeable_p (var);
1232 /* If the type has custom visualizer, we consider it to be always
1233 changeable. FIXME: need to make sure this behaviour will not
1234 mess up read-sensitive values. */
1235 if (var->pretty_printer)
1238 need_to_fetch = changeable;
1240 /* We are not interested in the address of references, and given
1241 that in C++ a reference is not rebindable, it cannot
1242 meaningfully change. So, get hold of the real value. */
1245 value = coerce_ref (value);
1246 release_value (value);
1249 if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION)
1250 /* For unions, we need to fetch the value implicitly because
1251 of implementation of union member fetch. When gdb
1252 creates a value for a field and the value of the enclosing
1253 structure is not lazy, it immediately copies the necessary
1254 bytes from the enclosing values. If the enclosing value is
1255 lazy, the call to value_fetch_lazy on the field will read
1256 the data from memory. For unions, that means we'll read the
1257 same memory more than once, which is not desirable. So
1261 /* The new value might be lazy. If the type is changeable,
1262 that is we'll be comparing values of this type, fetch the
1263 value now. Otherwise, on the next update the old value
1264 will be lazy, which means we've lost that old value. */
1265 if (need_to_fetch && value && value_lazy (value))
1267 struct varobj *parent = var->parent;
1268 int frozen = var->frozen;
1269 for (; !frozen && parent; parent = parent->parent)
1270 frozen |= parent->frozen;
1272 if (frozen && initial)
1274 /* For variables that are frozen, or are children of frozen
1275 variables, we don't do fetch on initial assignment.
1276 For non-initial assignemnt we do the fetch, since it means we're
1277 explicitly asked to compare the new value with the old one. */
1278 intentionally_not_fetched = 1;
1280 else if (!gdb_value_fetch_lazy (value))
1282 /* Set the value to NULL, so that for the next -var-update,
1283 we don't try to compare the new value with this value,
1284 that we couldn't even read. */
1290 /* Below, we'll be comparing string rendering of old and new
1291 values. Don't get string rendering if the value is
1292 lazy -- if it is, the code above has decided that the value
1293 should not be fetched. */
1294 if (value && !value_lazy (value))
1295 print_value = value_get_print_value (value, var->format, var);
1297 /* If the type is changeable, compare the old and the new values.
1298 If this is the initial assignment, we don't have any old value
1300 if (!initial && changeable)
1302 /* If the value of the varobj was changed by -var-set-value, then the
1303 value in the varobj and in the target is the same. However, that value
1304 is different from the value that the varobj had after the previous
1305 -var-update. So need to the varobj as changed. */
1312 /* Try to compare the values. That requires that both
1313 values are non-lazy. */
1314 if (var->not_fetched && value_lazy (var->value))
1316 /* This is a frozen varobj and the value was never read.
1317 Presumably, UI shows some "never read" indicator.
1318 Now that we've fetched the real value, we need to report
1319 this varobj as changed so that UI can show the real
1323 else if (var->value == NULL && value == NULL)
1326 else if (var->value == NULL || value == NULL)
1332 gdb_assert (!value_lazy (var->value));
1333 gdb_assert (!value_lazy (value));
1335 gdb_assert (var->print_value != NULL && print_value != NULL);
1336 if (strcmp (var->print_value, print_value) != 0)
1342 if (!initial && !changeable)
1344 /* For values that are not changeable, we don't compare the values.
1345 However, we want to notice if a value was not NULL and now is NULL,
1346 or vise versa, so that we report when top-level varobjs come in scope
1347 and leave the scope. */
1348 changed = (var->value != NULL) != (value != NULL);
1351 /* We must always keep the new value, since children depend on it. */
1352 if (var->value != NULL && var->value != value)
1353 value_free (var->value);
1355 if (var->print_value)
1356 xfree (var->print_value);
1357 var->print_value = print_value;
1358 if (value && value_lazy (value) && intentionally_not_fetched)
1359 var->not_fetched = 1;
1361 var->not_fetched = 0;
1364 gdb_assert (!var->value || value_type (var->value));
1370 install_visualizer (struct varobj *var, PyObject *visualizer)
1373 /* If there are any children now, wipe them. */
1374 varobj_delete (var, NULL, 1 /* children only */);
1375 var->num_children = -1;
1377 Py_XDECREF (var->pretty_printer);
1378 var->pretty_printer = visualizer;
1380 install_new_value (var, var->value, 1);
1382 /* If we removed the visualizer, and the user ever requested the
1383 object's children, then we must compute the list of children.
1384 Note that we needn't do this when installing a visualizer,
1385 because updating will recompute dynamic children. */
1386 if (!visualizer && var->children_requested)
1387 varobj_list_children (var);
1389 error (_("Python support required"));
1394 install_default_visualizer (struct varobj *var)
1397 struct cleanup *cleanup;
1398 PyObject *pretty_printer = NULL;
1400 cleanup = varobj_ensure_python_env (var);
1404 pretty_printer = gdbpy_get_varobj_pretty_printer (var->value);
1405 if (! pretty_printer)
1407 gdbpy_print_stack ();
1408 error (_("Cannot instantiate printer for default visualizer"));
1412 if (pretty_printer == Py_None)
1414 Py_DECREF (pretty_printer);
1415 pretty_printer = NULL;
1418 install_visualizer (var, pretty_printer);
1419 do_cleanups (cleanup);
1421 /* No error is right as this function is inserted just as a hook. */
1426 varobj_set_visualizer (struct varobj *var, const char *visualizer)
1429 PyObject *mainmod, *globals, *pretty_printer, *constructor;
1430 struct cleanup *back_to, *value;
1432 back_to = varobj_ensure_python_env (var);
1434 mainmod = PyImport_AddModule ("__main__");
1435 globals = PyModule_GetDict (mainmod);
1436 Py_INCREF (globals);
1437 make_cleanup_py_decref (globals);
1439 constructor = PyRun_String (visualizer, Py_eval_input, globals, globals);
1441 /* Do not instantiate NoneType. */
1442 if (constructor == Py_None)
1444 pretty_printer = Py_None;
1445 Py_INCREF (pretty_printer);
1448 pretty_printer = instantiate_pretty_printer (constructor, var->value);
1450 Py_XDECREF (constructor);
1452 if (! pretty_printer)
1454 gdbpy_print_stack ();
1455 error (_("Could not evaluate visualizer expression: %s"), visualizer);
1458 if (pretty_printer == Py_None)
1460 Py_DECREF (pretty_printer);
1461 pretty_printer = NULL;
1464 install_visualizer (var, pretty_printer);
1466 do_cleanups (back_to);
1468 error (_("Python support required"));
1472 /* Update the values for a variable and its children. This is a
1473 two-pronged attack. First, re-parse the value for the root's
1474 expression to see if it's changed. Then go all the way
1475 through its children, reconstructing them and noting if they've
1478 The EXPLICIT parameter specifies if this call is result
1479 of MI request to update this specific variable, or
1480 result of implicit -var-update *. For implicit request, we don't
1481 update frozen variables.
1483 NOTE: This function may delete the caller's varobj. If it
1484 returns TYPE_CHANGED, then it has done this and VARP will be modified
1485 to point to the new varobj. */
1487 VEC(varobj_update_result) *varobj_update (struct varobj **varp, int explicit)
1490 int type_changed = 0;
1495 struct varobj **templist = NULL;
1497 VEC (varobj_update_result) *stack = NULL;
1498 VEC (varobj_update_result) *result = NULL;
1499 struct frame_info *fi;
1501 /* Frozen means frozen -- we don't check for any change in
1502 this varobj, including its going out of scope, or
1503 changing type. One use case for frozen varobjs is
1504 retaining previously evaluated expressions, and we don't
1505 want them to be reevaluated at all. */
1506 if (!explicit && (*varp)->frozen)
1509 if (!(*varp)->root->is_valid)
1511 varobj_update_result r = {*varp};
1512 r.status = VAROBJ_INVALID;
1513 VEC_safe_push (varobj_update_result, result, &r);
1517 if ((*varp)->root->rootvar == *varp)
1519 varobj_update_result r = {*varp};
1520 r.status = VAROBJ_IN_SCOPE;
1522 /* Update the root variable. value_of_root can return NULL
1523 if the variable is no longer around, i.e. we stepped out of
1524 the frame in which a local existed. We are letting the
1525 value_of_root variable dispose of the varobj if the type
1527 new = value_of_root (varp, &type_changed);
1530 r.type_changed = type_changed;
1531 if (install_new_value ((*varp), new, type_changed))
1535 r.status = VAROBJ_NOT_IN_SCOPE;
1536 r.value_installed = 1;
1538 if (r.status == VAROBJ_NOT_IN_SCOPE)
1540 if (r.type_changed || r.changed)
1541 VEC_safe_push (varobj_update_result, result, &r);
1545 VEC_safe_push (varobj_update_result, stack, &r);
1549 varobj_update_result r = {*varp};
1550 VEC_safe_push (varobj_update_result, stack, &r);
1553 /* Walk through the children, reconstructing them all. */
1554 while (!VEC_empty (varobj_update_result, stack))
1556 varobj_update_result r = *(VEC_last (varobj_update_result, stack));
1557 struct varobj *v = r.varobj;
1559 VEC_pop (varobj_update_result, stack);
1561 /* Update this variable, unless it's a root, which is already
1563 if (!r.value_installed)
1565 new = value_of_child (v->parent, v->index);
1566 if (install_new_value (v, new, 0 /* type not changed */))
1573 /* We probably should not get children of a varobj that has a
1574 pretty-printer, but for which -var-list-children was never
1575 invoked. Presumably, such varobj is not yet expanded in the
1576 UI, so we need not bother getting it. */
1577 if (v->pretty_printer)
1579 VEC (varobj_p) *changed = 0, *new_and_unchanged = 0;
1580 int i, children_changed;
1583 if (!v->children_requested)
1589 /* If update_dynamic_varobj_children returns 0, then we have
1590 a non-conforming pretty-printer, so we skip it. */
1591 if (update_dynamic_varobj_children (v, &changed, &new_and_unchanged,
1594 if (children_changed)
1595 r.children_changed = 1;
1596 for (i = 0; VEC_iterate (varobj_p, changed, i, tmp); ++i)
1598 varobj_update_result r = {tmp};
1600 r.value_installed = 1;
1601 VEC_safe_push (varobj_update_result, stack, &r);
1604 VEC_iterate (varobj_p, new_and_unchanged, i, tmp);
1607 varobj_update_result r = {tmp};
1608 r.value_installed = 1;
1609 VEC_safe_push (varobj_update_result, stack, &r);
1611 if (r.changed || r.children_changed)
1612 VEC_safe_push (varobj_update_result, result, &r);
1617 /* Push any children. Use reverse order so that the first
1618 child is popped from the work stack first, and so
1619 will be added to result first. This does not
1620 affect correctness, just "nicer". */
1621 for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i)
1623 varobj_p c = VEC_index (varobj_p, v->children, i);
1624 /* Child may be NULL if explicitly deleted by -var-delete. */
1625 if (c != NULL && !c->frozen)
1627 varobj_update_result r = {c};
1628 VEC_safe_push (varobj_update_result, stack, &r);
1632 if (r.changed || r.type_changed)
1633 VEC_safe_push (varobj_update_result, result, &r);
1636 VEC_free (varobj_update_result, stack);
1642 /* Helper functions */
1645 * Variable object construction/destruction
1649 delete_variable (struct cpstack **resultp, struct varobj *var,
1650 int only_children_p)
1654 delete_variable_1 (resultp, &delcount, var,
1655 only_children_p, 1 /* remove_from_parent_p */ );
1660 /* Delete the variable object VAR and its children */
1661 /* IMPORTANT NOTE: If we delete a variable which is a child
1662 and the parent is not removed we dump core. It must be always
1663 initially called with remove_from_parent_p set */
1665 delete_variable_1 (struct cpstack **resultp, int *delcountp,
1666 struct varobj *var, int only_children_p,
1667 int remove_from_parent_p)
1671 /* Delete any children of this variable, too. */
1672 for (i = 0; i < VEC_length (varobj_p, var->children); ++i)
1674 varobj_p child = VEC_index (varobj_p, var->children, i);
1677 if (!remove_from_parent_p)
1678 child->parent = NULL;
1679 delete_variable_1 (resultp, delcountp, child, 0, only_children_p);
1681 VEC_free (varobj_p, var->children);
1683 /* if we were called to delete only the children we are done here */
1684 if (only_children_p)
1687 /* Otherwise, add it to the list of deleted ones and proceed to do so */
1688 /* If the name is null, this is a temporary variable, that has not
1689 yet been installed, don't report it, it belongs to the caller... */
1690 if (var->obj_name != NULL)
1692 cppush (resultp, xstrdup (var->obj_name));
1693 *delcountp = *delcountp + 1;
1696 /* If this variable has a parent, remove it from its parent's list */
1697 /* OPTIMIZATION: if the parent of this variable is also being deleted,
1698 (as indicated by remove_from_parent_p) we don't bother doing an
1699 expensive list search to find the element to remove when we are
1700 discarding the list afterwards */
1701 if ((remove_from_parent_p) && (var->parent != NULL))
1703 VEC_replace (varobj_p, var->parent->children, var->index, NULL);
1706 if (var->obj_name != NULL)
1707 uninstall_variable (var);
1709 /* Free memory associated with this variable */
1710 free_variable (var);
1713 /* Install the given variable VAR with the object name VAR->OBJ_NAME. */
1715 install_variable (struct varobj *var)
1718 struct vlist *newvl;
1720 unsigned int index = 0;
1723 for (chp = var->obj_name; *chp; chp++)
1725 index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE;
1728 cv = *(varobj_table + index);
1729 while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0))
1733 error (_("Duplicate variable object name"));
1735 /* Add varobj to hash table */
1736 newvl = xmalloc (sizeof (struct vlist));
1737 newvl->next = *(varobj_table + index);
1739 *(varobj_table + index) = newvl;
1741 /* If root, add varobj to root list */
1742 if (is_root_p (var))
1744 /* Add to list of root variables */
1745 if (rootlist == NULL)
1746 var->root->next = NULL;
1748 var->root->next = rootlist;
1749 rootlist = var->root;
1756 /* Unistall the object VAR. */
1758 uninstall_variable (struct varobj *var)
1762 struct varobj_root *cr;
1763 struct varobj_root *prer;
1765 unsigned int index = 0;
1768 /* Remove varobj from hash table */
1769 for (chp = var->obj_name; *chp; chp++)
1771 index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE;
1774 cv = *(varobj_table + index);
1776 while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0))
1783 fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name);
1788 ("Assertion failed: Could not find variable object \"%s\" to delete",
1794 *(varobj_table + index) = cv->next;
1796 prev->next = cv->next;
1800 /* If root, remove varobj from root list */
1801 if (is_root_p (var))
1803 /* Remove from list of root variables */
1804 if (rootlist == var->root)
1805 rootlist = var->root->next;
1810 while ((cr != NULL) && (cr->rootvar != var))
1818 ("Assertion failed: Could not find varobj \"%s\" in root list",
1825 prer->next = cr->next;
1832 /* Create and install a child of the parent of the given name */
1833 static struct varobj *
1834 create_child (struct varobj *parent, int index, char *name)
1836 return create_child_with_value (parent, index, name,
1837 value_of_child (parent, index));
1840 static struct varobj *
1841 create_child_with_value (struct varobj *parent, int index, const char *name,
1842 struct value *value)
1844 struct varobj *child;
1847 child = new_variable ();
1849 /* name is allocated by name_of_child */
1850 /* FIXME: xstrdup should not be here. */
1851 child->name = xstrdup (name);
1852 child->index = index;
1853 child->parent = parent;
1854 child->root = parent->root;
1855 childs_name = xstrprintf ("%s.%s", parent->obj_name, name);
1856 child->obj_name = childs_name;
1857 install_variable (child);
1859 /* Compute the type of the child. Must do this before
1860 calling install_new_value. */
1862 /* If the child had no evaluation errors, var->value
1863 will be non-NULL and contain a valid type. */
1864 child->type = value_type (value);
1866 /* Otherwise, we must compute the type. */
1867 child->type = (*child->root->lang->type_of_child) (child->parent,
1869 install_new_value (child, value, 1);
1876 * Miscellaneous utility functions.
1879 /* Allocate memory and initialize a new variable */
1880 static struct varobj *
1885 var = (struct varobj *) xmalloc (sizeof (struct varobj));
1887 var->path_expr = NULL;
1888 var->obj_name = NULL;
1892 var->num_children = -1;
1894 var->children = NULL;
1898 var->print_value = NULL;
1900 var->not_fetched = 0;
1901 var->children_requested = 0;
1902 var->pretty_printer = 0;
1907 /* Allocate memory and initialize a new root variable */
1908 static struct varobj *
1909 new_root_variable (void)
1911 struct varobj *var = new_variable ();
1912 var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));;
1913 var->root->lang = NULL;
1914 var->root->exp = NULL;
1915 var->root->valid_block = NULL;
1916 var->root->frame = null_frame_id;
1917 var->root->floating = 0;
1918 var->root->rootvar = NULL;
1919 var->root->is_valid = 1;
1924 /* Free any allocated memory associated with VAR. */
1926 free_variable (struct varobj *var)
1929 if (var->pretty_printer)
1931 struct cleanup *cleanup = varobj_ensure_python_env (var);
1932 Py_DECREF (var->pretty_printer);
1933 do_cleanups (cleanup);
1937 value_free (var->value);
1939 /* Free the expression if this is a root variable. */
1940 if (is_root_p (var))
1942 xfree (var->root->exp);
1947 xfree (var->obj_name);
1948 xfree (var->print_value);
1949 xfree (var->path_expr);
1954 do_free_variable_cleanup (void *var)
1956 free_variable (var);
1959 static struct cleanup *
1960 make_cleanup_free_variable (struct varobj *var)
1962 return make_cleanup (do_free_variable_cleanup, var);
1965 /* This returns the type of the variable. It also skips past typedefs
1966 to return the real type of the variable.
1968 NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file
1969 except within get_target_type and get_type. */
1970 static struct type *
1971 get_type (struct varobj *var)
1977 type = check_typedef (type);
1982 /* Return the type of the value that's stored in VAR,
1983 or that would have being stored there if the
1984 value were accessible.
1986 This differs from VAR->type in that VAR->type is always
1987 the true type of the expession in the source language.
1988 The return value of this function is the type we're
1989 actually storing in varobj, and using for displaying
1990 the values and for comparing previous and new values.
1992 For example, top-level references are always stripped. */
1993 static struct type *
1994 get_value_type (struct varobj *var)
1999 type = value_type (var->value);
2003 type = check_typedef (type);
2005 if (TYPE_CODE (type) == TYPE_CODE_REF)
2006 type = get_target_type (type);
2008 type = check_typedef (type);
2013 /* This returns the target type (or NULL) of TYPE, also skipping
2014 past typedefs, just like get_type ().
2016 NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file
2017 except within get_target_type and get_type. */
2018 static struct type *
2019 get_target_type (struct type *type)
2023 type = TYPE_TARGET_TYPE (type);
2025 type = check_typedef (type);
2031 /* What is the default display for this variable? We assume that
2032 everything is "natural". Any exceptions? */
2033 static enum varobj_display_formats
2034 variable_default_display (struct varobj *var)
2036 return FORMAT_NATURAL;
2039 /* FIXME: The following should be generic for any pointer */
2041 cppush (struct cpstack **pstack, char *name)
2045 s = (struct cpstack *) xmalloc (sizeof (struct cpstack));
2051 /* FIXME: The following should be generic for any pointer */
2053 cppop (struct cpstack **pstack)
2058 if ((*pstack)->name == NULL && (*pstack)->next == NULL)
2063 *pstack = (*pstack)->next;
2070 * Language-dependencies
2073 /* Common entry points */
2075 /* Get the language of variable VAR. */
2076 static enum varobj_languages
2077 variable_language (struct varobj *var)
2079 enum varobj_languages lang;
2081 switch (var->root->exp->language_defn->la_language)
2087 case language_cplus:
2098 /* Return the number of children for a given variable.
2099 The result of this function is defined by the language
2100 implementation. The number of children returned by this function
2101 is the number of children that the user will see in the variable
2104 number_of_children (struct varobj *var)
2106 return (*var->root->lang->number_of_children) (var);;
2109 /* What is the expression for the root varobj VAR? Returns a malloc'd string. */
2111 name_of_variable (struct varobj *var)
2113 return (*var->root->lang->name_of_variable) (var);
2116 /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */
2118 name_of_child (struct varobj *var, int index)
2120 return (*var->root->lang->name_of_child) (var, index);
2123 /* What is the ``struct value *'' of the root variable VAR?
2124 For floating variable object, evaluation can get us a value
2125 of different type from what is stored in varobj already. In
2127 - *type_changed will be set to 1
2128 - old varobj will be freed, and new one will be
2129 created, with the same name.
2130 - *var_handle will be set to the new varobj
2131 Otherwise, *type_changed will be set to 0. */
2132 static struct value *
2133 value_of_root (struct varobj **var_handle, int *type_changed)
2137 if (var_handle == NULL)
2142 /* This should really be an exception, since this should
2143 only get called with a root variable. */
2145 if (!is_root_p (var))
2148 if (var->root->floating)
2150 struct varobj *tmp_var;
2151 char *old_type, *new_type;
2153 tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0,
2154 USE_SELECTED_FRAME);
2155 if (tmp_var == NULL)
2159 old_type = varobj_get_type (var);
2160 new_type = varobj_get_type (tmp_var);
2161 if (strcmp (old_type, new_type) == 0)
2163 /* The expression presently stored inside var->root->exp
2164 remembers the locations of local variables relatively to
2165 the frame where the expression was created (in DWARF location
2166 button, for example). Naturally, those locations are not
2167 correct in other frames, so update the expression. */
2169 struct expression *tmp_exp = var->root->exp;
2170 var->root->exp = tmp_var->root->exp;
2171 tmp_var->root->exp = tmp_exp;
2173 varobj_delete (tmp_var, NULL, 0);
2178 tmp_var->obj_name = xstrdup (var->obj_name);
2179 varobj_delete (var, NULL, 0);
2181 install_variable (tmp_var);
2182 *var_handle = tmp_var;
2194 return (*var->root->lang->value_of_root) (var_handle);
2197 /* What is the ``struct value *'' for the INDEX'th child of PARENT? */
2198 static struct value *
2199 value_of_child (struct varobj *parent, int index)
2201 struct value *value;
2203 value = (*parent->root->lang->value_of_child) (parent, index);
2208 /* GDB already has a command called "value_of_variable". Sigh. */
2210 my_value_of_variable (struct varobj *var, enum varobj_display_formats format)
2212 if (var->root->is_valid)
2213 return (*var->root->lang->value_of_variable) (var, format);
2219 value_get_print_value (struct value *value, enum varobj_display_formats format,
2223 struct ui_file *stb;
2224 struct cleanup *old_chain;
2225 char *thevalue = NULL;
2226 struct value_print_options opts;
2233 struct cleanup *back_to = varobj_ensure_python_env (var);
2234 PyObject *value_formatter = var->pretty_printer;
2236 if (value_formatter && PyObject_HasAttr (value_formatter,
2237 gdbpy_to_string_cst))
2240 struct value *replacement;
2241 int string_print = 0;
2243 hint = gdbpy_get_display_hint (value_formatter);
2246 if (!strcmp (hint, "string"))
2251 thevalue = apply_varobj_pretty_printer (value_formatter,
2253 if (thevalue && !string_print)
2255 do_cleanups (back_to);
2259 value = replacement;
2261 do_cleanups (back_to);
2265 stb = mem_fileopen ();
2266 old_chain = make_cleanup_ui_file_delete (stb);
2268 get_formatted_print_options (&opts, format_code[(int) format]);
2273 struct gdbarch *gdbarch = get_type_arch (value_type (value));
2274 make_cleanup (xfree, thevalue);
2275 LA_PRINT_STRING (stb, builtin_type (gdbarch)->builtin_char,
2276 (gdb_byte *) thevalue, strlen (thevalue),
2280 common_val_print (value, stb, 0, &opts, current_language);
2281 thevalue = ui_file_xstrdup (stb, &dummy);
2283 do_cleanups (old_chain);
2288 varobj_editable_p (struct varobj *var)
2291 struct value *value;
2293 if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value)))
2296 type = get_value_type (var);
2298 switch (TYPE_CODE (type))
2300 case TYPE_CODE_STRUCT:
2301 case TYPE_CODE_UNION:
2302 case TYPE_CODE_ARRAY:
2303 case TYPE_CODE_FUNC:
2304 case TYPE_CODE_METHOD:
2314 /* Return non-zero if changes in value of VAR
2315 must be detected and reported by -var-update.
2316 Return zero is -var-update should never report
2317 changes of such values. This makes sense for structures
2318 (since the changes in children values will be reported separately),
2319 or for artifical objects (like 'public' pseudo-field in C++).
2321 Return value of 0 means that gdb need not call value_fetch_lazy
2322 for the value of this variable object. */
2324 varobj_value_is_changeable_p (struct varobj *var)
2329 if (CPLUS_FAKE_CHILD (var))
2332 type = get_value_type (var);
2334 switch (TYPE_CODE (type))
2336 case TYPE_CODE_STRUCT:
2337 case TYPE_CODE_UNION:
2338 case TYPE_CODE_ARRAY:
2349 /* Return 1 if that varobj is floating, that is is always evaluated in the
2350 selected frame, and not bound to thread/frame. Such variable objects
2351 are created using '@' as frame specifier to -var-create. */
2353 varobj_floating_p (struct varobj *var)
2355 return var->root->floating;
2358 /* Given the value and the type of a variable object,
2359 adjust the value and type to those necessary
2360 for getting children of the variable object.
2361 This includes dereferencing top-level references
2362 to all types and dereferencing pointers to
2365 Both TYPE and *TYPE should be non-null. VALUE
2366 can be null if we want to only translate type.
2367 *VALUE can be null as well -- if the parent
2370 If WAS_PTR is not NULL, set *WAS_PTR to 0 or 1
2371 depending on whether pointer was dereferenced
2372 in this function. */
2374 adjust_value_for_child_access (struct value **value,
2378 gdb_assert (type && *type);
2383 *type = check_typedef (*type);
2385 /* The type of value stored in varobj, that is passed
2386 to us, is already supposed to be
2387 reference-stripped. */
2389 gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF);
2391 /* Pointers to structures are treated just like
2392 structures when accessing children. Don't
2393 dererences pointers to other types. */
2394 if (TYPE_CODE (*type) == TYPE_CODE_PTR)
2396 struct type *target_type = get_target_type (*type);
2397 if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT
2398 || TYPE_CODE (target_type) == TYPE_CODE_UNION)
2400 if (value && *value)
2402 int success = gdb_value_ind (*value, value);
2406 *type = target_type;
2412 /* The 'get_target_type' function calls check_typedef on
2413 result, so we can immediately check type code. No
2414 need to call check_typedef here. */
2419 c_number_of_children (struct varobj *var)
2421 struct type *type = get_value_type (var);
2423 struct type *target;
2425 adjust_value_for_child_access (NULL, &type, NULL);
2426 target = get_target_type (type);
2428 switch (TYPE_CODE (type))
2430 case TYPE_CODE_ARRAY:
2431 if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0
2432 && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
2433 children = TYPE_LENGTH (type) / TYPE_LENGTH (target);
2435 /* If we don't know how many elements there are, don't display
2440 case TYPE_CODE_STRUCT:
2441 case TYPE_CODE_UNION:
2442 children = TYPE_NFIELDS (type);
2446 /* The type here is a pointer to non-struct. Typically, pointers
2447 have one child, except for function ptrs, which have no children,
2448 and except for void*, as we don't know what to show.
2450 We can show char* so we allow it to be dereferenced. If you decide
2451 to test for it, please mind that a little magic is necessary to
2452 properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and
2453 TYPE_NAME == "char" */
2454 if (TYPE_CODE (target) == TYPE_CODE_FUNC
2455 || TYPE_CODE (target) == TYPE_CODE_VOID)
2462 /* Other types have no children */
2470 c_name_of_variable (struct varobj *parent)
2472 return xstrdup (parent->name);
2475 /* Return the value of element TYPE_INDEX of a structure
2476 value VALUE. VALUE's type should be a structure,
2477 or union, or a typedef to struct/union.
2479 Returns NULL if getting the value fails. Never throws. */
2480 static struct value *
2481 value_struct_element_index (struct value *value, int type_index)
2483 struct value *result = NULL;
2484 volatile struct gdb_exception e;
2486 struct type *type = value_type (value);
2487 type = check_typedef (type);
2489 gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT
2490 || TYPE_CODE (type) == TYPE_CODE_UNION);
2492 TRY_CATCH (e, RETURN_MASK_ERROR)
2494 if (field_is_static (&TYPE_FIELD (type, type_index)))
2495 result = value_static_field (type, type_index);
2497 result = value_primitive_field (value, 0, type_index, type);
2509 /* Obtain the information about child INDEX of the variable
2511 If CNAME is not null, sets *CNAME to the name of the child relative
2513 If CVALUE is not null, sets *CVALUE to the value of the child.
2514 If CTYPE is not null, sets *CTYPE to the type of the child.
2516 If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding
2517 information cannot be determined, set *CNAME, *CVALUE, or *CTYPE
2520 c_describe_child (struct varobj *parent, int index,
2521 char **cname, struct value **cvalue, struct type **ctype,
2522 char **cfull_expression)
2524 struct value *value = parent->value;
2525 struct type *type = get_value_type (parent);
2526 char *parent_expression = NULL;
2535 if (cfull_expression)
2537 *cfull_expression = NULL;
2538 parent_expression = varobj_get_path_expr (parent);
2540 adjust_value_for_child_access (&value, &type, &was_ptr);
2542 switch (TYPE_CODE (type))
2544 case TYPE_CODE_ARRAY:
2546 *cname = xstrprintf ("%d", index
2547 + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)));
2549 if (cvalue && value)
2551 int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type));
2552 gdb_value_subscript (value, real_index, cvalue);
2556 *ctype = get_target_type (type);
2558 if (cfull_expression)
2559 *cfull_expression = xstrprintf ("(%s)[%d]", parent_expression,
2561 + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)));
2566 case TYPE_CODE_STRUCT:
2567 case TYPE_CODE_UNION:
2569 *cname = xstrdup (TYPE_FIELD_NAME (type, index));
2571 if (cvalue && value)
2573 /* For C, varobj index is the same as type index. */
2574 *cvalue = value_struct_element_index (value, index);
2578 *ctype = TYPE_FIELD_TYPE (type, index);
2580 if (cfull_expression)
2582 char *join = was_ptr ? "->" : ".";
2583 *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression, join,
2584 TYPE_FIELD_NAME (type, index));
2591 *cname = xstrprintf ("*%s", parent->name);
2593 if (cvalue && value)
2595 int success = gdb_value_ind (value, cvalue);
2600 /* Don't use get_target_type because it calls
2601 check_typedef and here, we want to show the true
2602 declared type of the variable. */
2604 *ctype = TYPE_TARGET_TYPE (type);
2606 if (cfull_expression)
2607 *cfull_expression = xstrprintf ("*(%s)", parent_expression);
2612 /* This should not happen */
2614 *cname = xstrdup ("???");
2615 if (cfull_expression)
2616 *cfull_expression = xstrdup ("???");
2617 /* Don't set value and type, we don't know then. */
2622 c_name_of_child (struct varobj *parent, int index)
2625 c_describe_child (parent, index, &name, NULL, NULL, NULL);
2630 c_path_expr_of_child (struct varobj *child)
2632 c_describe_child (child->parent, child->index, NULL, NULL, NULL,
2634 return child->path_expr;
2637 /* If frame associated with VAR can be found, switch
2638 to it and return 1. Otherwise, return 0. */
2640 check_scope (struct varobj *var)
2642 struct frame_info *fi;
2645 fi = frame_find_by_id (var->root->frame);
2650 CORE_ADDR pc = get_frame_pc (fi);
2651 if (pc < BLOCK_START (var->root->valid_block) ||
2652 pc >= BLOCK_END (var->root->valid_block))
2660 static struct value *
2661 c_value_of_root (struct varobj **var_handle)
2663 struct value *new_val = NULL;
2664 struct varobj *var = *var_handle;
2665 struct frame_info *fi;
2666 int within_scope = 0;
2667 struct cleanup *back_to;
2669 /* Only root variables can be updated... */
2670 if (!is_root_p (var))
2671 /* Not a root var */
2674 back_to = make_cleanup_restore_current_thread ();
2676 /* Determine whether the variable is still around. */
2677 if (var->root->valid_block == NULL || var->root->floating)
2679 else if (var->root->thread_id == 0)
2681 /* The program was single-threaded when the variable object was
2682 created. Technically, it's possible that the program became
2683 multi-threaded since then, but we don't support such
2685 within_scope = check_scope (var);
2689 ptid_t ptid = thread_id_to_pid (var->root->thread_id);
2690 if (in_thread_list (ptid))
2692 switch_to_thread (ptid);
2693 within_scope = check_scope (var);
2699 /* We need to catch errors here, because if evaluate
2700 expression fails we want to just return NULL. */
2701 gdb_evaluate_expression (var->root->exp, &new_val);
2705 do_cleanups (back_to);
2710 static struct value *
2711 c_value_of_child (struct varobj *parent, int index)
2713 struct value *value = NULL;
2714 c_describe_child (parent, index, NULL, &value, NULL, NULL);
2719 static struct type *
2720 c_type_of_child (struct varobj *parent, int index)
2722 struct type *type = NULL;
2723 c_describe_child (parent, index, NULL, NULL, &type, NULL);
2728 c_value_of_variable (struct varobj *var, enum varobj_display_formats format)
2730 /* BOGUS: if val_print sees a struct/class, or a reference to one,
2731 it will print out its children instead of "{...}". So we need to
2732 catch that case explicitly. */
2733 struct type *type = get_type (var);
2735 /* If we have a custom formatter, return whatever string it has
2737 if (var->pretty_printer && var->print_value)
2738 return xstrdup (var->print_value);
2740 /* Strip top-level references. */
2741 while (TYPE_CODE (type) == TYPE_CODE_REF)
2742 type = check_typedef (TYPE_TARGET_TYPE (type));
2744 switch (TYPE_CODE (type))
2746 case TYPE_CODE_STRUCT:
2747 case TYPE_CODE_UNION:
2748 return xstrdup ("{...}");
2751 case TYPE_CODE_ARRAY:
2754 number = xstrprintf ("[%d]", var->num_children);
2761 if (var->value == NULL)
2763 /* This can happen if we attempt to get the value of a struct
2764 member when the parent is an invalid pointer. This is an
2765 error condition, so we should tell the caller. */
2770 if (var->not_fetched && value_lazy (var->value))
2771 /* Frozen variable and no value yet. We don't
2772 implicitly fetch the value. MI response will
2773 use empty string for the value, which is OK. */
2776 gdb_assert (varobj_value_is_changeable_p (var));
2777 gdb_assert (!value_lazy (var->value));
2779 /* If the specified format is the current one,
2780 we can reuse print_value */
2781 if (format == var->format)
2782 return xstrdup (var->print_value);
2784 return value_get_print_value (var->value, format, var);
2794 cplus_number_of_children (struct varobj *var)
2797 int children, dont_know;
2802 if (!CPLUS_FAKE_CHILD (var))
2804 type = get_value_type (var);
2805 adjust_value_for_child_access (NULL, &type, NULL);
2807 if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) ||
2808 ((TYPE_CODE (type)) == TYPE_CODE_UNION))
2812 cplus_class_num_children (type, kids);
2813 if (kids[v_public] != 0)
2815 if (kids[v_private] != 0)
2817 if (kids[v_protected] != 0)
2820 /* Add any baseclasses */
2821 children += TYPE_N_BASECLASSES (type);
2824 /* FIXME: save children in var */
2831 type = get_value_type (var->parent);
2832 adjust_value_for_child_access (NULL, &type, NULL);
2834 cplus_class_num_children (type, kids);
2835 if (strcmp (var->name, "public") == 0)
2836 children = kids[v_public];
2837 else if (strcmp (var->name, "private") == 0)
2838 children = kids[v_private];
2840 children = kids[v_protected];
2845 children = c_number_of_children (var);
2850 /* Compute # of public, private, and protected variables in this class.
2851 That means we need to descend into all baseclasses and find out
2852 how many are there, too. */
2854 cplus_class_num_children (struct type *type, int children[3])
2858 children[v_public] = 0;
2859 children[v_private] = 0;
2860 children[v_protected] = 0;
2862 for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++)
2864 /* If we have a virtual table pointer, omit it. */
2865 if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i)
2868 if (TYPE_FIELD_PROTECTED (type, i))
2869 children[v_protected]++;
2870 else if (TYPE_FIELD_PRIVATE (type, i))
2871 children[v_private]++;
2873 children[v_public]++;
2878 cplus_name_of_variable (struct varobj *parent)
2880 return c_name_of_variable (parent);
2883 enum accessibility { private_field, protected_field, public_field };
2885 /* Check if field INDEX of TYPE has the specified accessibility.
2886 Return 0 if so and 1 otherwise. */
2888 match_accessibility (struct type *type, int index, enum accessibility acc)
2890 if (acc == private_field && TYPE_FIELD_PRIVATE (type, index))
2892 else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index))
2894 else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index)
2895 && !TYPE_FIELD_PROTECTED (type, index))
2902 cplus_describe_child (struct varobj *parent, int index,
2903 char **cname, struct value **cvalue, struct type **ctype,
2904 char **cfull_expression)
2907 struct value *value;
2910 char *parent_expression = NULL;
2918 if (cfull_expression)
2919 *cfull_expression = NULL;
2921 if (CPLUS_FAKE_CHILD (parent))
2923 value = parent->parent->value;
2924 type = get_value_type (parent->parent);
2925 if (cfull_expression)
2926 parent_expression = varobj_get_path_expr (parent->parent);
2930 value = parent->value;
2931 type = get_value_type (parent);
2932 if (cfull_expression)
2933 parent_expression = varobj_get_path_expr (parent);
2936 adjust_value_for_child_access (&value, &type, &was_ptr);
2938 if (TYPE_CODE (type) == TYPE_CODE_STRUCT
2939 || TYPE_CODE (type) == TYPE_CODE_UNION)
2941 char *join = was_ptr ? "->" : ".";
2942 if (CPLUS_FAKE_CHILD (parent))
2944 /* The fields of the class type are ordered as they
2945 appear in the class. We are given an index for a
2946 particular access control type ("public","protected",
2947 or "private"). We must skip over fields that don't
2948 have the access control we are looking for to properly
2949 find the indexed field. */
2950 int type_index = TYPE_N_BASECLASSES (type);
2951 enum accessibility acc = public_field;
2952 if (strcmp (parent->name, "private") == 0)
2953 acc = private_field;
2954 else if (strcmp (parent->name, "protected") == 0)
2955 acc = protected_field;
2959 if (TYPE_VPTR_BASETYPE (type) == type
2960 && type_index == TYPE_VPTR_FIELDNO (type))
2962 else if (match_accessibility (type, type_index, acc))
2969 *cname = xstrdup (TYPE_FIELD_NAME (type, type_index));
2971 if (cvalue && value)
2972 *cvalue = value_struct_element_index (value, type_index);
2975 *ctype = TYPE_FIELD_TYPE (type, type_index);
2977 if (cfull_expression)
2978 *cfull_expression = xstrprintf ("((%s)%s%s)", parent_expression,
2980 TYPE_FIELD_NAME (type, type_index));
2982 else if (index < TYPE_N_BASECLASSES (type))
2984 /* This is a baseclass. */
2986 *cname = xstrdup (TYPE_FIELD_NAME (type, index));
2988 if (cvalue && value)
2990 *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value);
2991 release_value (*cvalue);
2996 *ctype = TYPE_FIELD_TYPE (type, index);
2999 if (cfull_expression)
3001 char *ptr = was_ptr ? "*" : "";
3002 /* Cast the parent to the base' type. Note that in gdb,
3005 will create an lvalue, for all appearences, so we don't
3006 need to use more fancy:
3009 *cfull_expression = xstrprintf ("(%s(%s%s) %s)",
3011 TYPE_FIELD_NAME (type, index),
3018 char *access = NULL;
3020 cplus_class_num_children (type, children);
3022 /* Everything beyond the baseclasses can
3023 only be "public", "private", or "protected"
3025 The special "fake" children are always output by varobj in
3026 this order. So if INDEX == 2, it MUST be "protected". */
3027 index -= TYPE_N_BASECLASSES (type);
3031 if (children[v_public] > 0)
3033 else if (children[v_private] > 0)
3036 access = "protected";
3039 if (children[v_public] > 0)
3041 if (children[v_private] > 0)
3044 access = "protected";
3046 else if (children[v_private] > 0)
3047 access = "protected";
3050 /* Must be protected */
3051 access = "protected";
3058 gdb_assert (access);
3060 *cname = xstrdup (access);
3062 /* Value and type and full expression are null here. */
3067 c_describe_child (parent, index, cname, cvalue, ctype, cfull_expression);
3072 cplus_name_of_child (struct varobj *parent, int index)
3075 cplus_describe_child (parent, index, &name, NULL, NULL, NULL);
3080 cplus_path_expr_of_child (struct varobj *child)
3082 cplus_describe_child (child->parent, child->index, NULL, NULL, NULL,
3084 return child->path_expr;
3087 static struct value *
3088 cplus_value_of_root (struct varobj **var_handle)
3090 return c_value_of_root (var_handle);
3093 static struct value *
3094 cplus_value_of_child (struct varobj *parent, int index)
3096 struct value *value = NULL;
3097 cplus_describe_child (parent, index, NULL, &value, NULL, NULL);
3101 static struct type *
3102 cplus_type_of_child (struct varobj *parent, int index)
3104 struct type *type = NULL;
3105 cplus_describe_child (parent, index, NULL, NULL, &type, NULL);
3110 cplus_value_of_variable (struct varobj *var, enum varobj_display_formats format)
3113 /* If we have one of our special types, don't print out
3115 if (CPLUS_FAKE_CHILD (var))
3116 return xstrdup ("");
3118 return c_value_of_variable (var, format);
3124 java_number_of_children (struct varobj *var)
3126 return cplus_number_of_children (var);
3130 java_name_of_variable (struct varobj *parent)
3134 name = cplus_name_of_variable (parent);
3135 /* If the name has "-" in it, it is because we
3136 needed to escape periods in the name... */
3139 while (*p != '\000')
3150 java_name_of_child (struct varobj *parent, int index)
3154 name = cplus_name_of_child (parent, index);
3155 /* Escape any periods in the name... */
3158 while (*p != '\000')
3169 java_path_expr_of_child (struct varobj *child)
3174 static struct value *
3175 java_value_of_root (struct varobj **var_handle)
3177 return cplus_value_of_root (var_handle);
3180 static struct value *
3181 java_value_of_child (struct varobj *parent, int index)
3183 return cplus_value_of_child (parent, index);
3186 static struct type *
3187 java_type_of_child (struct varobj *parent, int index)
3189 return cplus_type_of_child (parent, index);
3193 java_value_of_variable (struct varobj *var, enum varobj_display_formats format)
3195 return cplus_value_of_variable (var, format);
3198 extern void _initialize_varobj (void);
3200 _initialize_varobj (void)
3202 int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE;
3204 varobj_table = xmalloc (sizeof_table);
3205 memset (varobj_table, 0, sizeof_table);
3207 add_setshow_zinteger_cmd ("debugvarobj", class_maintenance,
3209 Set varobj debugging."), _("\
3210 Show varobj debugging."), _("\
3211 When non-zero, varobj debugging is enabled."),
3214 &setlist, &showlist);
3217 /* Invalidate the varobjs that are tied to locals and re-create the ones that
3218 are defined on globals.
3219 Invalidated varobjs will be always printed in_scope="invalid". */
3222 varobj_invalidate (void)
3224 struct varobj **all_rootvarobj;
3225 struct varobj **varp;
3227 if (varobj_list (&all_rootvarobj) > 0)
3229 varp = all_rootvarobj;
3230 while (*varp != NULL)
3232 /* Floating varobjs are reparsed on each stop, so we don't care if
3233 the presently parsed expression refers to something that's gone.
3235 if ((*varp)->root->floating)
3238 /* global var must be re-evaluated. */
3239 if ((*varp)->root->valid_block == NULL)
3241 struct varobj *tmp_var;
3243 /* Try to create a varobj with same expression. If we succeed
3244 replace the old varobj, otherwise invalidate it. */
3245 tmp_var = varobj_create (NULL, (*varp)->name, (CORE_ADDR) 0,
3247 if (tmp_var != NULL)
3249 tmp_var->obj_name = xstrdup ((*varp)->obj_name);
3250 varobj_delete (*varp, NULL, 0);
3251 install_variable (tmp_var);
3254 (*varp)->root->is_valid = 0;
3256 else /* locals must be invalidated. */
3257 (*varp)->root->is_valid = 0;
3262 xfree (all_rootvarobj);