2520 lines
62 KiB
C
2520 lines
62 KiB
C
/* Implementation of the GDB variable objects API.
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Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
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Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "defs.h"
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#include "exceptions.h"
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#include "value.h"
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#include "expression.h"
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#include "frame.h"
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#include "language.h"
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#include "wrapper.h"
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#include "gdbcmd.h"
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#include "block.h"
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#include "gdb_assert.h"
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#include "gdb_string.h"
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#include "varobj.h"
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#include "vec.h"
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/* Non-zero if we want to see trace of varobj level stuff. */
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int varobjdebug = 0;
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static void
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show_varobjdebug (struct ui_file *file, int from_tty,
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struct cmd_list_element *c, const char *value)
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{
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fprintf_filtered (file, _("Varobj debugging is %s.\n"), value);
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}
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/* String representations of gdb's format codes */
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char *varobj_format_string[] =
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{ "natural", "binary", "decimal", "hexadecimal", "octal" };
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/* String representations of gdb's known languages */
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char *varobj_language_string[] = { "unknown", "C", "C++", "Java" };
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/* Data structures */
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/* Every root variable has one of these structures saved in its
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varobj. Members which must be free'd are noted. */
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struct varobj_root
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{
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/* Alloc'd expression for this parent. */
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struct expression *exp;
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/* Block for which this expression is valid */
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struct block *valid_block;
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/* The frame for this expression */
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struct frame_id frame;
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/* If 1, "update" always recomputes the frame & valid block
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using the currently selected frame. */
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int use_selected_frame;
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/* Language info for this variable and its children */
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struct language_specific *lang;
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/* The varobj for this root node. */
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struct varobj *rootvar;
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/* Next root variable */
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struct varobj_root *next;
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};
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typedef struct varobj *varobj_p;
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DEF_VEC_P (varobj_p);
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/* Every variable in the system has a structure of this type defined
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for it. This structure holds all information necessary to manipulate
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a particular object variable. Members which must be freed are noted. */
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struct varobj
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{
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/* Alloc'd name of the variable for this object.. If this variable is a
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child, then this name will be the child's source name.
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(bar, not foo.bar) */
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/* NOTE: This is the "expression" */
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char *name;
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/* The alloc'd name for this variable's object. This is here for
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convenience when constructing this object's children. */
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char *obj_name;
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/* Index of this variable in its parent or -1 */
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int index;
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/* The type of this variable. This may NEVER be NULL. */
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struct type *type;
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/* The value of this expression or subexpression. This may be NULL.
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Invariant: if varobj_value_is_changeable_p (this) is non-zero,
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the value is either NULL, or not lazy. */
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struct value *value;
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/* Did an error occur evaluating the expression or getting its value? */
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int error;
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/* The number of (immediate) children this variable has */
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int num_children;
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/* If this object is a child, this points to its immediate parent. */
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struct varobj *parent;
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/* Children of this object. */
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VEC (varobj_p) *children;
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/* Description of the root variable. Points to root variable for children. */
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struct varobj_root *root;
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/* The format of the output for this object */
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enum varobj_display_formats format;
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/* Was this variable updated via a varobj_set_value operation */
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int updated;
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};
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struct cpstack
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{
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char *name;
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struct cpstack *next;
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};
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/* A list of varobjs */
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struct vlist
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{
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struct varobj *var;
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struct vlist *next;
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};
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/* Private function prototypes */
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/* Helper functions for the above subcommands. */
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static int delete_variable (struct cpstack **, struct varobj *, int);
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static void delete_variable_1 (struct cpstack **, int *,
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struct varobj *, int, int);
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static int install_variable (struct varobj *);
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static void uninstall_variable (struct varobj *);
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static struct varobj *create_child (struct varobj *, int, char *);
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/* Utility routines */
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static struct varobj *new_variable (void);
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static struct varobj *new_root_variable (void);
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static void free_variable (struct varobj *var);
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static struct cleanup *make_cleanup_free_variable (struct varobj *var);
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static struct type *get_type (struct varobj *var);
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static struct type *get_type_deref (struct varobj *var);
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static struct type *get_target_type (struct type *);
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static enum varobj_display_formats variable_default_display (struct varobj *);
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static void cppush (struct cpstack **pstack, char *name);
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static char *cppop (struct cpstack **pstack);
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static int install_new_value (struct varobj *var, struct value *value,
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int initial);
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/* Language-specific routines. */
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static enum varobj_languages variable_language (struct varobj *var);
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static int number_of_children (struct varobj *);
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static char *name_of_variable (struct varobj *);
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static char *name_of_child (struct varobj *, int);
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static struct value *value_of_root (struct varobj **var_handle, int *);
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static struct value *value_of_child (struct varobj *parent, int index);
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static int variable_editable (struct varobj *var);
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static char *my_value_of_variable (struct varobj *var);
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static int varobj_value_is_changeable_p (struct varobj *var);
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static int is_root_p (struct varobj *var);
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/* C implementation */
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static int c_number_of_children (struct varobj *var);
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static char *c_name_of_variable (struct varobj *parent);
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static char *c_name_of_child (struct varobj *parent, int index);
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static struct value *c_value_of_root (struct varobj **var_handle);
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static struct value *c_value_of_child (struct varobj *parent, int index);
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static struct type *c_type_of_child (struct varobj *parent, int index);
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static int c_variable_editable (struct varobj *var);
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static char *c_value_of_variable (struct varobj *var);
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/* C++ implementation */
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static int cplus_number_of_children (struct varobj *var);
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static void cplus_class_num_children (struct type *type, int children[3]);
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static char *cplus_name_of_variable (struct varobj *parent);
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static char *cplus_name_of_child (struct varobj *parent, int index);
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static struct value *cplus_value_of_root (struct varobj **var_handle);
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static struct value *cplus_value_of_child (struct varobj *parent, int index);
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static struct type *cplus_type_of_child (struct varobj *parent, int index);
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static int cplus_variable_editable (struct varobj *var);
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static char *cplus_value_of_variable (struct varobj *var);
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/* Java implementation */
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static int java_number_of_children (struct varobj *var);
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static char *java_name_of_variable (struct varobj *parent);
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static char *java_name_of_child (struct varobj *parent, int index);
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static struct value *java_value_of_root (struct varobj **var_handle);
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static struct value *java_value_of_child (struct varobj *parent, int index);
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static struct type *java_type_of_child (struct varobj *parent, int index);
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static int java_variable_editable (struct varobj *var);
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static char *java_value_of_variable (struct varobj *var);
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/* The language specific vector */
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struct language_specific
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{
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/* The language of this variable */
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enum varobj_languages language;
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/* The number of children of PARENT. */
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int (*number_of_children) (struct varobj * parent);
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/* The name (expression) of a root varobj. */
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char *(*name_of_variable) (struct varobj * parent);
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/* The name of the INDEX'th child of PARENT. */
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char *(*name_of_child) (struct varobj * parent, int index);
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/* The ``struct value *'' of the root variable ROOT. */
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struct value *(*value_of_root) (struct varobj ** root_handle);
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/* The ``struct value *'' of the INDEX'th child of PARENT. */
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struct value *(*value_of_child) (struct varobj * parent, int index);
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/* The type of the INDEX'th child of PARENT. */
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struct type *(*type_of_child) (struct varobj * parent, int index);
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/* Is VAR editable? */
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int (*variable_editable) (struct varobj * var);
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/* The current value of VAR. */
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char *(*value_of_variable) (struct varobj * var);
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};
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/* Array of known source language routines. */
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static struct language_specific languages[vlang_end] = {
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/* Unknown (try treating as C */
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{
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vlang_unknown,
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c_number_of_children,
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c_name_of_variable,
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c_name_of_child,
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c_value_of_root,
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c_value_of_child,
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c_type_of_child,
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c_variable_editable,
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c_value_of_variable}
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,
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/* C */
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{
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vlang_c,
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c_number_of_children,
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c_name_of_variable,
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c_name_of_child,
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c_value_of_root,
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c_value_of_child,
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c_type_of_child,
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c_variable_editable,
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c_value_of_variable}
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,
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/* C++ */
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{
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vlang_cplus,
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cplus_number_of_children,
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cplus_name_of_variable,
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cplus_name_of_child,
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cplus_value_of_root,
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cplus_value_of_child,
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cplus_type_of_child,
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cplus_variable_editable,
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cplus_value_of_variable}
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,
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/* Java */
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{
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vlang_java,
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java_number_of_children,
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java_name_of_variable,
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java_name_of_child,
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java_value_of_root,
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java_value_of_child,
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java_type_of_child,
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java_variable_editable,
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java_value_of_variable}
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};
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/* A little convenience enum for dealing with C++/Java */
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enum vsections
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{
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v_public = 0, v_private, v_protected
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};
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/* Private data */
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/* Mappings of varobj_display_formats enums to gdb's format codes */
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static int format_code[] = { 0, 't', 'd', 'x', 'o' };
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/* Header of the list of root variable objects */
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static struct varobj_root *rootlist;
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static int rootcount = 0; /* number of root varobjs in the list */
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/* Prime number indicating the number of buckets in the hash table */
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/* A prime large enough to avoid too many colisions */
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#define VAROBJ_TABLE_SIZE 227
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/* Pointer to the varobj hash table (built at run time) */
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static struct vlist **varobj_table;
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/* Is the variable X one of our "fake" children? */
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#define CPLUS_FAKE_CHILD(x) \
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((x) != NULL && (x)->type == NULL && (x)->value == NULL)
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/* API Implementation */
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static int
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is_root_p (struct varobj *var)
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{
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return (var->root->rootvar == var);
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}
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/* Creates a varobj (not its children) */
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/* Return the full FRAME which corresponds to the given CORE_ADDR
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or NULL if no FRAME on the chain corresponds to CORE_ADDR. */
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static struct frame_info *
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find_frame_addr_in_frame_chain (CORE_ADDR frame_addr)
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{
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struct frame_info *frame = NULL;
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if (frame_addr == (CORE_ADDR) 0)
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return NULL;
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while (1)
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{
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frame = get_prev_frame (frame);
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if (frame == NULL)
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return NULL;
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if (get_frame_base_address (frame) == frame_addr)
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return frame;
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}
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}
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struct varobj *
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varobj_create (char *objname,
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char *expression, CORE_ADDR frame, enum varobj_type type)
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{
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struct varobj *var;
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struct frame_info *fi;
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struct frame_info *old_fi = NULL;
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struct block *block;
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struct cleanup *old_chain;
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/* Fill out a varobj structure for the (root) variable being constructed. */
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var = new_root_variable ();
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old_chain = make_cleanup_free_variable (var);
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if (expression != NULL)
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{
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char *p;
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enum varobj_languages lang;
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struct value *value;
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/* Parse and evaluate the expression, filling in as much
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of the variable's data as possible */
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/* Allow creator to specify context of variable */
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if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME))
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fi = deprecated_selected_frame;
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else
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/* FIXME: cagney/2002-11-23: This code should be doing a
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lookup using the frame ID and not just the frame's
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``address''. This, of course, means an interface change.
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However, with out that interface change ISAs, such as the
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ia64 with its two stacks, won't work. Similar goes for the
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case where there is a frameless function. */
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fi = find_frame_addr_in_frame_chain (frame);
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/* frame = -2 means always use selected frame */
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if (type == USE_SELECTED_FRAME)
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var->root->use_selected_frame = 1;
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block = NULL;
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if (fi != NULL)
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block = get_frame_block (fi, 0);
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p = expression;
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innermost_block = NULL;
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/* Wrap the call to parse expression, so we can
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return a sensible error. */
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if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp))
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{
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return NULL;
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}
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||
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||
/* Don't allow variables to be created for types. */
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if (var->root->exp->elts[0].opcode == OP_TYPE)
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{
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||
do_cleanups (old_chain);
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fprintf_unfiltered (gdb_stderr, "Attempt to use a type name"
|
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" as an expression.\n");
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return NULL;
|
||
}
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||
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var->format = variable_default_display (var);
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var->root->valid_block = innermost_block;
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var->name = savestring (expression, strlen (expression));
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||
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/* When the frame is different from the current frame,
|
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we must select the appropriate frame before parsing
|
||
the expression, otherwise the value will not be current.
|
||
Since select_frame is so benign, just call it for all cases. */
|
||
if (fi != NULL)
|
||
{
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||
var->root->frame = get_frame_id (fi);
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old_fi = deprecated_selected_frame;
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||
select_frame (fi);
|
||
}
|
||
|
||
/* We definitively need to catch errors here.
|
||
If evaluate_expression succeeds we got the value we wanted.
|
||
But if it fails, we still go on with a call to evaluate_type() */
|
||
if (!gdb_evaluate_expression (var->root->exp, &value))
|
||
/* Error getting the value. Try to at least get the
|
||
right type. */
|
||
value = evaluate_type (var->root->exp);
|
||
|
||
var->type = value_type (value);
|
||
install_new_value (var, value, 1 /* Initial assignment */);
|
||
|
||
/* Set language info */
|
||
lang = variable_language (var);
|
||
var->root->lang = &languages[lang];
|
||
|
||
/* Set ourselves as our root */
|
||
var->root->rootvar = var;
|
||
|
||
/* Reset the selected frame */
|
||
if (fi != NULL)
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||
select_frame (old_fi);
|
||
}
|
||
|
||
/* If the variable object name is null, that means this
|
||
is a temporary variable, so don't install it. */
|
||
|
||
if ((var != NULL) && (objname != NULL))
|
||
{
|
||
var->obj_name = savestring (objname, strlen (objname));
|
||
|
||
/* If a varobj name is duplicated, the install will fail so
|
||
we must clenup */
|
||
if (!install_variable (var))
|
||
{
|
||
do_cleanups (old_chain);
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
discard_cleanups (old_chain);
|
||
return var;
|
||
}
|
||
|
||
/* Generates an unique name that can be used for a varobj */
|
||
|
||
char *
|
||
varobj_gen_name (void)
|
||
{
|
||
static int id = 0;
|
||
char *obj_name;
|
||
|
||
/* generate a name for this object */
|
||
id++;
|
||
obj_name = xstrprintf ("var%d", id);
|
||
|
||
return obj_name;
|
||
}
|
||
|
||
/* Given an "objname", returns the pointer to the corresponding varobj
|
||
or NULL if not found */
|
||
|
||
struct varobj *
|
||
varobj_get_handle (char *objname)
|
||
{
|
||
struct vlist *cv;
|
||
const char *chp;
|
||
unsigned int index = 0;
|
||
unsigned int i = 1;
|
||
|
||
for (chp = objname; *chp; chp++)
|
||
{
|
||
index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE;
|
||
}
|
||
|
||
cv = *(varobj_table + index);
|
||
while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0))
|
||
cv = cv->next;
|
||
|
||
if (cv == NULL)
|
||
error (_("Variable object not found"));
|
||
|
||
return cv->var;
|
||
}
|
||
|
||
/* Given the handle, return the name of the object */
|
||
|
||
char *
|
||
varobj_get_objname (struct varobj *var)
|
||
{
|
||
return var->obj_name;
|
||
}
|
||
|
||
/* Given the handle, return the expression represented by the object */
|
||
|
||
char *
|
||
varobj_get_expression (struct varobj *var)
|
||
{
|
||
return name_of_variable (var);
|
||
}
|
||
|
||
/* Deletes a varobj and all its children if only_children == 0,
|
||
otherwise deletes only the children; returns a malloc'ed list of all the
|
||
(malloc'ed) names of the variables that have been deleted (NULL terminated) */
|
||
|
||
int
|
||
varobj_delete (struct varobj *var, char ***dellist, int only_children)
|
||
{
|
||
int delcount;
|
||
int mycount;
|
||
struct cpstack *result = NULL;
|
||
char **cp;
|
||
|
||
/* Initialize a stack for temporary results */
|
||
cppush (&result, NULL);
|
||
|
||
if (only_children)
|
||
/* Delete only the variable children */
|
||
delcount = delete_variable (&result, var, 1 /* only the children */ );
|
||
else
|
||
/* Delete the variable and all its children */
|
||
delcount = delete_variable (&result, var, 0 /* parent+children */ );
|
||
|
||
/* We may have been asked to return a list of what has been deleted */
|
||
if (dellist != NULL)
|
||
{
|
||
*dellist = xmalloc ((delcount + 1) * sizeof (char *));
|
||
|
||
cp = *dellist;
|
||
mycount = delcount;
|
||
*cp = cppop (&result);
|
||
while ((*cp != NULL) && (mycount > 0))
|
||
{
|
||
mycount--;
|
||
cp++;
|
||
*cp = cppop (&result);
|
||
}
|
||
|
||
if (mycount || (*cp != NULL))
|
||
warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"),
|
||
mycount);
|
||
}
|
||
|
||
return delcount;
|
||
}
|
||
|
||
/* Set/Get variable object display format */
|
||
|
||
enum varobj_display_formats
|
||
varobj_set_display_format (struct varobj *var,
|
||
enum varobj_display_formats format)
|
||
{
|
||
switch (format)
|
||
{
|
||
case FORMAT_NATURAL:
|
||
case FORMAT_BINARY:
|
||
case FORMAT_DECIMAL:
|
||
case FORMAT_HEXADECIMAL:
|
||
case FORMAT_OCTAL:
|
||
var->format = format;
|
||
break;
|
||
|
||
default:
|
||
var->format = variable_default_display (var);
|
||
}
|
||
|
||
return var->format;
|
||
}
|
||
|
||
enum varobj_display_formats
|
||
varobj_get_display_format (struct varobj *var)
|
||
{
|
||
return var->format;
|
||
}
|
||
|
||
int
|
||
varobj_get_num_children (struct varobj *var)
|
||
{
|
||
if (var->num_children == -1)
|
||
var->num_children = number_of_children (var);
|
||
|
||
return var->num_children;
|
||
}
|
||
|
||
/* Creates a list of the immediate children of a variable object;
|
||
the return code is the number of such children or -1 on error */
|
||
|
||
int
|
||
varobj_list_children (struct varobj *var, struct varobj ***childlist)
|
||
{
|
||
struct varobj *child;
|
||
char *name;
|
||
int i;
|
||
|
||
/* sanity check: have we been passed a pointer? */
|
||
if (childlist == NULL)
|
||
return -1;
|
||
|
||
*childlist = NULL;
|
||
|
||
if (var->num_children == -1)
|
||
var->num_children = number_of_children (var);
|
||
|
||
/* If that failed, give up. */
|
||
if (var->num_children == -1)
|
||
return -1;
|
||
|
||
/* If we're called when the list of children is not yet initialized,
|
||
allocate enough elements in it. */
|
||
while (VEC_length (varobj_p, var->children) < var->num_children)
|
||
VEC_safe_push (varobj_p, var->children, NULL);
|
||
|
||
/* List of children */
|
||
*childlist = xmalloc ((var->num_children + 1) * sizeof (struct varobj *));
|
||
|
||
for (i = 0; i < var->num_children; i++)
|
||
{
|
||
varobj_p existing;
|
||
|
||
/* Mark as the end in case we bail out */
|
||
*((*childlist) + i) = NULL;
|
||
|
||
existing = VEC_index (varobj_p, var->children, i);
|
||
|
||
if (existing == NULL)
|
||
{
|
||
/* Either it's the first call to varobj_list_children for
|
||
this variable object, and the child was never created,
|
||
or it was explicitly deleted by the client. */
|
||
name = name_of_child (var, i);
|
||
existing = create_child (var, i, name);
|
||
VEC_replace (varobj_p, var->children, i, existing);
|
||
}
|
||
|
||
*((*childlist) + i) = existing;
|
||
}
|
||
|
||
/* End of list is marked by a NULL pointer */
|
||
*((*childlist) + i) = NULL;
|
||
|
||
return var->num_children;
|
||
}
|
||
|
||
/* Obtain the type of an object Variable as a string similar to the one gdb
|
||
prints on the console */
|
||
|
||
char *
|
||
varobj_get_type (struct varobj *var)
|
||
{
|
||
struct value *val;
|
||
struct cleanup *old_chain;
|
||
struct ui_file *stb;
|
||
char *thetype;
|
||
long length;
|
||
|
||
/* For the "fake" variables, do not return a type. (It's type is
|
||
NULL, too.) */
|
||
if (CPLUS_FAKE_CHILD (var))
|
||
return NULL;
|
||
|
||
stb = mem_fileopen ();
|
||
old_chain = make_cleanup_ui_file_delete (stb);
|
||
|
||
/* To print the type, we simply create a zero ``struct value *'' and
|
||
cast it to our type. We then typeprint this variable. */
|
||
val = value_zero (var->type, not_lval);
|
||
type_print (value_type (val), "", stb, -1);
|
||
|
||
thetype = ui_file_xstrdup (stb, &length);
|
||
do_cleanups (old_chain);
|
||
return thetype;
|
||
}
|
||
|
||
/* Obtain the type of an object variable. */
|
||
|
||
struct type *
|
||
varobj_get_gdb_type (struct varobj *var)
|
||
{
|
||
return var->type;
|
||
}
|
||
|
||
enum varobj_languages
|
||
varobj_get_language (struct varobj *var)
|
||
{
|
||
return variable_language (var);
|
||
}
|
||
|
||
int
|
||
varobj_get_attributes (struct varobj *var)
|
||
{
|
||
int attributes = 0;
|
||
|
||
if (variable_editable (var))
|
||
/* FIXME: define masks for attributes */
|
||
attributes |= 0x00000001; /* Editable */
|
||
|
||
return attributes;
|
||
}
|
||
|
||
char *
|
||
varobj_get_value (struct varobj *var)
|
||
{
|
||
return my_value_of_variable (var);
|
||
}
|
||
|
||
/* Set the value of an object variable (if it is editable) to the
|
||
value of the given expression */
|
||
/* Note: Invokes functions that can call error() */
|
||
|
||
int
|
||
varobj_set_value (struct varobj *var, char *expression)
|
||
{
|
||
struct value *val;
|
||
int offset = 0;
|
||
int error = 0;
|
||
|
||
/* The argument "expression" contains the variable's new value.
|
||
We need to first construct a legal expression for this -- ugh! */
|
||
/* Does this cover all the bases? */
|
||
struct expression *exp;
|
||
struct value *value;
|
||
int saved_input_radix = input_radix;
|
||
|
||
if (var->value != NULL && variable_editable (var) && !var->error)
|
||
{
|
||
char *s = expression;
|
||
int i;
|
||
|
||
input_radix = 10; /* ALWAYS reset to decimal temporarily */
|
||
exp = parse_exp_1 (&s, 0, 0);
|
||
if (!gdb_evaluate_expression (exp, &value))
|
||
{
|
||
/* We cannot proceed without a valid expression. */
|
||
xfree (exp);
|
||
return 0;
|
||
}
|
||
|
||
/* All types that are editable must also be changeable. */
|
||
gdb_assert (varobj_value_is_changeable_p (var));
|
||
|
||
/* The value of a changeable variable object must not be lazy. */
|
||
gdb_assert (!value_lazy (var->value));
|
||
|
||
/* Need to coerce the input. We want to check if the
|
||
value of the variable object will be different
|
||
after assignment, and the first thing value_assign
|
||
does is coerce the input.
|
||
For example, if we are assigning an array to a pointer variable we
|
||
should compare the pointer with the the array's address, not with the
|
||
array's content. */
|
||
value = coerce_array (value);
|
||
|
||
/* The new value may be lazy. gdb_value_assign, or
|
||
rather value_contents, will take care of this.
|
||
If fetching of the new value will fail, gdb_value_assign
|
||
with catch the exception. */
|
||
if (!gdb_value_assign (var->value, value, &val))
|
||
return 0;
|
||
|
||
/* If the value has changed, record it, so that next -var-update can
|
||
report this change. If a variable had a value of '1', we've set it
|
||
to '333' and then set again to '1', when -var-update will report this
|
||
variable as changed -- because the first assignment has set the
|
||
'updated' flag. There's no need to optimize that, because return value
|
||
of -var-update should be considered an approximation. */
|
||
var->updated = install_new_value (var, val, 0 /* Compare values. */);
|
||
input_radix = saved_input_radix;
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Returns a malloc'ed list with all root variable objects */
|
||
int
|
||
varobj_list (struct varobj ***varlist)
|
||
{
|
||
struct varobj **cv;
|
||
struct varobj_root *croot;
|
||
int mycount = rootcount;
|
||
|
||
/* Alloc (rootcount + 1) entries for the result */
|
||
*varlist = xmalloc ((rootcount + 1) * sizeof (struct varobj *));
|
||
|
||
cv = *varlist;
|
||
croot = rootlist;
|
||
while ((croot != NULL) && (mycount > 0))
|
||
{
|
||
*cv = croot->rootvar;
|
||
mycount--;
|
||
cv++;
|
||
croot = croot->next;
|
||
}
|
||
/* Mark the end of the list */
|
||
*cv = NULL;
|
||
|
||
if (mycount || (croot != NULL))
|
||
warning
|
||
("varobj_list: assertion failed - wrong tally of root vars (%d:%d)",
|
||
rootcount, mycount);
|
||
|
||
return rootcount;
|
||
}
|
||
|
||
/* Assign a new value to a variable object. If INITIAL is non-zero,
|
||
this is the first assignement after the variable object was just
|
||
created, or changed type. In that case, just assign the value
|
||
and return 0.
|
||
Otherwise, assign the value and if type_changeable returns non-zero,
|
||
find if the new value is different from the current value.
|
||
Return 1 if so, and 0 if the values are equal.
|
||
|
||
The VALUE parameter should not be released -- the function will
|
||
take care of releasing it when needed. */
|
||
static int
|
||
install_new_value (struct varobj *var, struct value *value, int initial)
|
||
{
|
||
int changeable;
|
||
int need_to_fetch;
|
||
int changed = 0;
|
||
|
||
var->error = 0;
|
||
/* We need to know the varobj's type to decide if the value should
|
||
be fetched or not. C++ fake children (public/protected/private) don't have
|
||
a type. */
|
||
gdb_assert (var->type || CPLUS_FAKE_CHILD (var));
|
||
changeable = varobj_value_is_changeable_p (var);
|
||
need_to_fetch = changeable;
|
||
|
||
/* We are not interested in the address of references, and given
|
||
that in C++ a reference is not rebindable, it cannot
|
||
meaningfully change. So, get hold of the real value. */
|
||
if (value)
|
||
{
|
||
value = coerce_ref (value);
|
||
release_value (value);
|
||
}
|
||
|
||
if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION)
|
||
/* For unions, we need to fetch the value implicitly because
|
||
of implementation of union member fetch. When gdb
|
||
creates a value for a field and the value of the enclosing
|
||
structure is not lazy, it immediately copies the necessary
|
||
bytes from the enclosing values. If the enclosing value is
|
||
lazy, the call to value_fetch_lazy on the field will read
|
||
the data from memory. For unions, that means we'll read the
|
||
same memory more than once, which is not desirable. So
|
||
fetch now. */
|
||
need_to_fetch = 1;
|
||
|
||
/* The new value might be lazy. If the type is changeable,
|
||
that is we'll be comparing values of this type, fetch the
|
||
value now. Otherwise, on the next update the old value
|
||
will be lazy, which means we've lost that old value. */
|
||
if (need_to_fetch && value && value_lazy (value))
|
||
{
|
||
if (!gdb_value_fetch_lazy (value))
|
||
{
|
||
var->error = 1;
|
||
/* Set the value to NULL, so that for the next -var-update,
|
||
we don't try to compare the new value with this value,
|
||
that we couldn't even read. */
|
||
value = NULL;
|
||
}
|
||
else
|
||
var->error = 0;
|
||
}
|
||
|
||
/* If the type is changeable, compare the old and the new values.
|
||
If this is the initial assignment, we don't have any old value
|
||
to compare with. */
|
||
if (!initial && changeable)
|
||
{
|
||
/* If the value of the varobj was changed by -var-set-value, then the
|
||
value in the varobj and in the target is the same. However, that value
|
||
is different from the value that the varobj had after the previous
|
||
-var-update. So need to the varobj as changed. */
|
||
if (var->updated)
|
||
changed = 1;
|
||
else
|
||
{
|
||
/* Try to compare the values. That requires that both
|
||
values are non-lazy. */
|
||
|
||
/* Quick comparison of NULL values. */
|
||
if (var->value == NULL && value == NULL)
|
||
/* Equal. */
|
||
;
|
||
else if (var->value == NULL || value == NULL)
|
||
changed = 1;
|
||
else
|
||
{
|
||
gdb_assert (!value_lazy (var->value));
|
||
gdb_assert (!value_lazy (value));
|
||
|
||
if (!value_contents_equal (var->value, value))
|
||
changed = 1;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* We must always keep the new value, since children depend on it. */
|
||
if (var->value != NULL)
|
||
value_free (var->value);
|
||
var->value = value;
|
||
var->updated = 0;
|
||
|
||
gdb_assert (!var->value || value_type (var->value));
|
||
|
||
return changed;
|
||
}
|
||
|
||
|
||
/* Update the values for a variable and its children. This is a
|
||
two-pronged attack. First, re-parse the value for the root's
|
||
expression to see if it's changed. Then go all the way
|
||
through its children, reconstructing them and noting if they've
|
||
changed.
|
||
Return value:
|
||
-1 if there was an error updating the varobj
|
||
-2 if the type changed
|
||
Otherwise it is the number of children + parent changed
|
||
|
||
Only root variables can be updated...
|
||
|
||
NOTE: This function may delete the caller's varobj. If it
|
||
returns -2, then it has done this and VARP will be modified
|
||
to point to the new varobj. */
|
||
|
||
int
|
||
varobj_update (struct varobj **varp, struct varobj ***changelist)
|
||
{
|
||
int changed = 0;
|
||
int error = 0;
|
||
int type_changed;
|
||
int i;
|
||
int vleft;
|
||
struct varobj *v;
|
||
struct varobj **cv;
|
||
struct varobj **templist = NULL;
|
||
struct value *new;
|
||
VEC (varobj_p) *stack = NULL;
|
||
VEC (varobj_p) *result = NULL;
|
||
struct frame_id old_fid;
|
||
struct frame_info *fi;
|
||
|
||
/* sanity check: have we been passed a pointer? */
|
||
if (changelist == NULL)
|
||
return -1;
|
||
|
||
/* Only root variables can be updated... */
|
||
if (!is_root_p (*varp))
|
||
/* Not a root var */
|
||
return -1;
|
||
|
||
/* Save the selected stack frame, since we will need to change it
|
||
in order to evaluate expressions. */
|
||
old_fid = get_frame_id (deprecated_selected_frame);
|
||
|
||
/* Update the root variable. value_of_root can return NULL
|
||
if the variable is no longer around, i.e. we stepped out of
|
||
the frame in which a local existed. We are letting the
|
||
value_of_root variable dispose of the varobj if the type
|
||
has changed. */
|
||
type_changed = 1;
|
||
new = value_of_root (varp, &type_changed);
|
||
|
||
/* Restore selected frame */
|
||
fi = frame_find_by_id (old_fid);
|
||
if (fi)
|
||
select_frame (fi);
|
||
|
||
if (new == NULL)
|
||
{
|
||
(*varp)->error = 1;
|
||
return -1;
|
||
}
|
||
|
||
/* If this is a "use_selected_frame" varobj, and its type has changed,
|
||
them note that it's changed. */
|
||
if (type_changed)
|
||
VEC_safe_push (varobj_p, result, *varp);
|
||
|
||
if (install_new_value ((*varp), new, type_changed))
|
||
{
|
||
/* If type_changed is 1, install_new_value will never return
|
||
non-zero, so we'll never report the same variable twice. */
|
||
gdb_assert (!type_changed);
|
||
VEC_safe_push (varobj_p, result, *varp);
|
||
}
|
||
|
||
VEC_safe_push (varobj_p, stack, *varp);
|
||
|
||
/* Walk through the children, reconstructing them all. */
|
||
while (!VEC_empty (varobj_p, stack))
|
||
{
|
||
v = VEC_pop (varobj_p, stack);
|
||
|
||
/* Push any children. Use reverse order so that the first
|
||
child is popped from the work stack first, and so
|
||
will be added to result first. This does not
|
||
affect correctness, just "nicer". */
|
||
for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i)
|
||
{
|
||
varobj_p c = VEC_index (varobj_p, v->children, i);
|
||
/* Child may be NULL if explicitly deleted by -var-delete. */
|
||
if (c != NULL)
|
||
VEC_safe_push (varobj_p, stack, c);
|
||
}
|
||
|
||
/* Update this variable, unless it's a root, which is already
|
||
updated. */
|
||
if (v != *varp)
|
||
{
|
||
new = value_of_child (v->parent, v->index);
|
||
if (install_new_value (v, new, 0 /* type not changed */))
|
||
{
|
||
/* Note that it's changed */
|
||
VEC_safe_push (varobj_p, result, v);
|
||
v->updated = 0;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Alloc (changed + 1) list entries */
|
||
changed = VEC_length (varobj_p, result);
|
||
*changelist = xmalloc ((changed + 1) * sizeof (struct varobj *));
|
||
cv = *changelist;
|
||
|
||
for (i = 0; i < changed; ++i)
|
||
{
|
||
*cv = VEC_index (varobj_p, result, i);
|
||
gdb_assert (*cv != NULL);
|
||
++cv;
|
||
}
|
||
*cv = 0;
|
||
|
||
if (type_changed)
|
||
return -2;
|
||
else
|
||
return changed;
|
||
}
|
||
|
||
|
||
/* Helper functions */
|
||
|
||
/*
|
||
* Variable object construction/destruction
|
||
*/
|
||
|
||
static int
|
||
delete_variable (struct cpstack **resultp, struct varobj *var,
|
||
int only_children_p)
|
||
{
|
||
int delcount = 0;
|
||
|
||
delete_variable_1 (resultp, &delcount, var,
|
||
only_children_p, 1 /* remove_from_parent_p */ );
|
||
|
||
return delcount;
|
||
}
|
||
|
||
/* Delete the variable object VAR and its children */
|
||
/* IMPORTANT NOTE: If we delete a variable which is a child
|
||
and the parent is not removed we dump core. It must be always
|
||
initially called with remove_from_parent_p set */
|
||
static void
|
||
delete_variable_1 (struct cpstack **resultp, int *delcountp,
|
||
struct varobj *var, int only_children_p,
|
||
int remove_from_parent_p)
|
||
{
|
||
int i;
|
||
|
||
/* Delete any children of this variable, too. */
|
||
for (i = 0; i < VEC_length (varobj_p, var->children); ++i)
|
||
{
|
||
varobj_p child = VEC_index (varobj_p, var->children, i);
|
||
if (!remove_from_parent_p)
|
||
child->parent = NULL;
|
||
delete_variable_1 (resultp, delcountp, child, 0, only_children_p);
|
||
}
|
||
VEC_free (varobj_p, var->children);
|
||
|
||
/* if we were called to delete only the children we are done here */
|
||
if (only_children_p)
|
||
return;
|
||
|
||
/* Otherwise, add it to the list of deleted ones and proceed to do so */
|
||
/* If the name is null, this is a temporary variable, that has not
|
||
yet been installed, don't report it, it belongs to the caller... */
|
||
if (var->obj_name != NULL)
|
||
{
|
||
cppush (resultp, xstrdup (var->obj_name));
|
||
*delcountp = *delcountp + 1;
|
||
}
|
||
|
||
/* If this variable has a parent, remove it from its parent's list */
|
||
/* OPTIMIZATION: if the parent of this variable is also being deleted,
|
||
(as indicated by remove_from_parent_p) we don't bother doing an
|
||
expensive list search to find the element to remove when we are
|
||
discarding the list afterwards */
|
||
if ((remove_from_parent_p) && (var->parent != NULL))
|
||
{
|
||
VEC_replace (varobj_p, var->parent->children, var->index, NULL);
|
||
}
|
||
|
||
if (var->obj_name != NULL)
|
||
uninstall_variable (var);
|
||
|
||
/* Free memory associated with this variable */
|
||
free_variable (var);
|
||
}
|
||
|
||
/* Install the given variable VAR with the object name VAR->OBJ_NAME. */
|
||
static int
|
||
install_variable (struct varobj *var)
|
||
{
|
||
struct vlist *cv;
|
||
struct vlist *newvl;
|
||
const char *chp;
|
||
unsigned int index = 0;
|
||
unsigned int i = 1;
|
||
|
||
for (chp = var->obj_name; *chp; chp++)
|
||
{
|
||
index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE;
|
||
}
|
||
|
||
cv = *(varobj_table + index);
|
||
while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0))
|
||
cv = cv->next;
|
||
|
||
if (cv != NULL)
|
||
error (_("Duplicate variable object name"));
|
||
|
||
/* Add varobj to hash table */
|
||
newvl = xmalloc (sizeof (struct vlist));
|
||
newvl->next = *(varobj_table + index);
|
||
newvl->var = var;
|
||
*(varobj_table + index) = newvl;
|
||
|
||
/* If root, add varobj to root list */
|
||
if (is_root_p (var))
|
||
{
|
||
/* Add to list of root variables */
|
||
if (rootlist == NULL)
|
||
var->root->next = NULL;
|
||
else
|
||
var->root->next = rootlist;
|
||
rootlist = var->root;
|
||
rootcount++;
|
||
}
|
||
|
||
return 1; /* OK */
|
||
}
|
||
|
||
/* Unistall the object VAR. */
|
||
static void
|
||
uninstall_variable (struct varobj *var)
|
||
{
|
||
struct vlist *cv;
|
||
struct vlist *prev;
|
||
struct varobj_root *cr;
|
||
struct varobj_root *prer;
|
||
const char *chp;
|
||
unsigned int index = 0;
|
||
unsigned int i = 1;
|
||
|
||
/* Remove varobj from hash table */
|
||
for (chp = var->obj_name; *chp; chp++)
|
||
{
|
||
index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE;
|
||
}
|
||
|
||
cv = *(varobj_table + index);
|
||
prev = NULL;
|
||
while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0))
|
||
{
|
||
prev = cv;
|
||
cv = cv->next;
|
||
}
|
||
|
||
if (varobjdebug)
|
||
fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name);
|
||
|
||
if (cv == NULL)
|
||
{
|
||
warning
|
||
("Assertion failed: Could not find variable object \"%s\" to delete",
|
||
var->obj_name);
|
||
return;
|
||
}
|
||
|
||
if (prev == NULL)
|
||
*(varobj_table + index) = cv->next;
|
||
else
|
||
prev->next = cv->next;
|
||
|
||
xfree (cv);
|
||
|
||
/* If root, remove varobj from root list */
|
||
if (is_root_p (var))
|
||
{
|
||
/* Remove from list of root variables */
|
||
if (rootlist == var->root)
|
||
rootlist = var->root->next;
|
||
else
|
||
{
|
||
prer = NULL;
|
||
cr = rootlist;
|
||
while ((cr != NULL) && (cr->rootvar != var))
|
||
{
|
||
prer = cr;
|
||
cr = cr->next;
|
||
}
|
||
if (cr == NULL)
|
||
{
|
||
warning
|
||
("Assertion failed: Could not find varobj \"%s\" in root list",
|
||
var->obj_name);
|
||
return;
|
||
}
|
||
if (prer == NULL)
|
||
rootlist = NULL;
|
||
else
|
||
prer->next = cr->next;
|
||
}
|
||
rootcount--;
|
||
}
|
||
|
||
}
|
||
|
||
/* Create and install a child of the parent of the given name */
|
||
static struct varobj *
|
||
create_child (struct varobj *parent, int index, char *name)
|
||
{
|
||
struct varobj *child;
|
||
char *childs_name;
|
||
struct value *value;
|
||
|
||
child = new_variable ();
|
||
|
||
/* name is allocated by name_of_child */
|
||
child->name = name;
|
||
child->index = index;
|
||
value = value_of_child (parent, index);
|
||
child->parent = parent;
|
||
child->root = parent->root;
|
||
childs_name = xstrprintf ("%s.%s", parent->obj_name, name);
|
||
child->obj_name = childs_name;
|
||
install_variable (child);
|
||
|
||
/* Compute the type of the child. Must do this before
|
||
calling install_new_value. */
|
||
if (value != NULL)
|
||
/* If the child had no evaluation errors, var->value
|
||
will be non-NULL and contain a valid type. */
|
||
child->type = value_type (value);
|
||
else
|
||
/* Otherwise, we must compute the type. */
|
||
child->type = (*child->root->lang->type_of_child) (child->parent,
|
||
child->index);
|
||
install_new_value (child, value, 1);
|
||
|
||
if ((!CPLUS_FAKE_CHILD (child) && child->value == NULL) || parent->error)
|
||
child->error = 1;
|
||
|
||
return child;
|
||
}
|
||
|
||
|
||
/*
|
||
* Miscellaneous utility functions.
|
||
*/
|
||
|
||
/* Allocate memory and initialize a new variable */
|
||
static struct varobj *
|
||
new_variable (void)
|
||
{
|
||
struct varobj *var;
|
||
|
||
var = (struct varobj *) xmalloc (sizeof (struct varobj));
|
||
var->name = NULL;
|
||
var->obj_name = NULL;
|
||
var->index = -1;
|
||
var->type = NULL;
|
||
var->value = NULL;
|
||
var->error = 0;
|
||
var->num_children = -1;
|
||
var->parent = NULL;
|
||
var->children = NULL;
|
||
var->format = 0;
|
||
var->root = NULL;
|
||
var->updated = 0;
|
||
|
||
return var;
|
||
}
|
||
|
||
/* Allocate memory and initialize a new root variable */
|
||
static struct varobj *
|
||
new_root_variable (void)
|
||
{
|
||
struct varobj *var = new_variable ();
|
||
var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));;
|
||
var->root->lang = NULL;
|
||
var->root->exp = NULL;
|
||
var->root->valid_block = NULL;
|
||
var->root->frame = null_frame_id;
|
||
var->root->use_selected_frame = 0;
|
||
var->root->rootvar = NULL;
|
||
|
||
return var;
|
||
}
|
||
|
||
/* Free any allocated memory associated with VAR. */
|
||
static void
|
||
free_variable (struct varobj *var)
|
||
{
|
||
/* Free the expression if this is a root variable. */
|
||
if (is_root_p (var))
|
||
{
|
||
free_current_contents (&var->root->exp);
|
||
xfree (var->root);
|
||
}
|
||
|
||
xfree (var->name);
|
||
xfree (var->obj_name);
|
||
xfree (var);
|
||
}
|
||
|
||
static void
|
||
do_free_variable_cleanup (void *var)
|
||
{
|
||
free_variable (var);
|
||
}
|
||
|
||
static struct cleanup *
|
||
make_cleanup_free_variable (struct varobj *var)
|
||
{
|
||
return make_cleanup (do_free_variable_cleanup, var);
|
||
}
|
||
|
||
/* This returns the type of the variable. It also skips past typedefs
|
||
to return the real type of the variable.
|
||
|
||
NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file
|
||
except within get_target_type and get_type. */
|
||
static struct type *
|
||
get_type (struct varobj *var)
|
||
{
|
||
struct type *type;
|
||
type = var->type;
|
||
|
||
if (type != NULL)
|
||
type = check_typedef (type);
|
||
|
||
return type;
|
||
}
|
||
|
||
/* This returns the type of the variable, dereferencing references, pointers
|
||
and references to pointers, too. */
|
||
static struct type *
|
||
get_type_deref (struct varobj *var)
|
||
{
|
||
struct type *type;
|
||
|
||
type = get_type (var);
|
||
|
||
if (type)
|
||
{
|
||
if (TYPE_CODE (type) == TYPE_CODE_REF)
|
||
type = get_target_type (type);
|
||
if (TYPE_CODE (type) == TYPE_CODE_PTR)
|
||
type = get_target_type (type);
|
||
}
|
||
|
||
return type;
|
||
}
|
||
|
||
/* This returns the target type (or NULL) of TYPE, also skipping
|
||
past typedefs, just like get_type ().
|
||
|
||
NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file
|
||
except within get_target_type and get_type. */
|
||
static struct type *
|
||
get_target_type (struct type *type)
|
||
{
|
||
if (type != NULL)
|
||
{
|
||
type = TYPE_TARGET_TYPE (type);
|
||
if (type != NULL)
|
||
type = check_typedef (type);
|
||
}
|
||
|
||
return type;
|
||
}
|
||
|
||
/* What is the default display for this variable? We assume that
|
||
everything is "natural". Any exceptions? */
|
||
static enum varobj_display_formats
|
||
variable_default_display (struct varobj *var)
|
||
{
|
||
return FORMAT_NATURAL;
|
||
}
|
||
|
||
/* FIXME: The following should be generic for any pointer */
|
||
static void
|
||
cppush (struct cpstack **pstack, char *name)
|
||
{
|
||
struct cpstack *s;
|
||
|
||
s = (struct cpstack *) xmalloc (sizeof (struct cpstack));
|
||
s->name = name;
|
||
s->next = *pstack;
|
||
*pstack = s;
|
||
}
|
||
|
||
/* FIXME: The following should be generic for any pointer */
|
||
static char *
|
||
cppop (struct cpstack **pstack)
|
||
{
|
||
struct cpstack *s;
|
||
char *v;
|
||
|
||
if ((*pstack)->name == NULL && (*pstack)->next == NULL)
|
||
return NULL;
|
||
|
||
s = *pstack;
|
||
v = s->name;
|
||
*pstack = (*pstack)->next;
|
||
xfree (s);
|
||
|
||
return v;
|
||
}
|
||
|
||
/*
|
||
* Language-dependencies
|
||
*/
|
||
|
||
/* Common entry points */
|
||
|
||
/* Get the language of variable VAR. */
|
||
static enum varobj_languages
|
||
variable_language (struct varobj *var)
|
||
{
|
||
enum varobj_languages lang;
|
||
|
||
switch (var->root->exp->language_defn->la_language)
|
||
{
|
||
default:
|
||
case language_c:
|
||
lang = vlang_c;
|
||
break;
|
||
case language_cplus:
|
||
lang = vlang_cplus;
|
||
break;
|
||
case language_java:
|
||
lang = vlang_java;
|
||
break;
|
||
}
|
||
|
||
return lang;
|
||
}
|
||
|
||
/* Return the number of children for a given variable.
|
||
The result of this function is defined by the language
|
||
implementation. The number of children returned by this function
|
||
is the number of children that the user will see in the variable
|
||
display. */
|
||
static int
|
||
number_of_children (struct varobj *var)
|
||
{
|
||
return (*var->root->lang->number_of_children) (var);;
|
||
}
|
||
|
||
/* What is the expression for the root varobj VAR? Returns a malloc'd string. */
|
||
static char *
|
||
name_of_variable (struct varobj *var)
|
||
{
|
||
return (*var->root->lang->name_of_variable) (var);
|
||
}
|
||
|
||
/* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */
|
||
static char *
|
||
name_of_child (struct varobj *var, int index)
|
||
{
|
||
return (*var->root->lang->name_of_child) (var, index);
|
||
}
|
||
|
||
/* What is the ``struct value *'' of the root variable VAR?
|
||
TYPE_CHANGED controls what to do if the type of a
|
||
use_selected_frame = 1 variable changes. On input,
|
||
TYPE_CHANGED = 1 means discard the old varobj, and replace
|
||
it with this one. TYPE_CHANGED = 0 means leave it around.
|
||
NB: In both cases, var_handle will point to the new varobj,
|
||
so if you use TYPE_CHANGED = 0, you will have to stash the
|
||
old varobj pointer away somewhere before calling this.
|
||
On return, TYPE_CHANGED will be 1 if the type has changed, and
|
||
0 otherwise. */
|
||
static struct value *
|
||
value_of_root (struct varobj **var_handle, int *type_changed)
|
||
{
|
||
struct varobj *var;
|
||
|
||
if (var_handle == NULL)
|
||
return NULL;
|
||
|
||
var = *var_handle;
|
||
|
||
/* This should really be an exception, since this should
|
||
only get called with a root variable. */
|
||
|
||
if (!is_root_p (var))
|
||
return NULL;
|
||
|
||
if (var->root->use_selected_frame)
|
||
{
|
||
struct varobj *tmp_var;
|
||
char *old_type, *new_type;
|
||
old_type = varobj_get_type (var);
|
||
tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0,
|
||
USE_SELECTED_FRAME);
|
||
if (tmp_var == NULL)
|
||
{
|
||
return NULL;
|
||
}
|
||
new_type = varobj_get_type (tmp_var);
|
||
if (strcmp (old_type, new_type) == 0)
|
||
{
|
||
varobj_delete (tmp_var, NULL, 0);
|
||
*type_changed = 0;
|
||
}
|
||
else
|
||
{
|
||
if (*type_changed)
|
||
{
|
||
tmp_var->obj_name =
|
||
savestring (var->obj_name, strlen (var->obj_name));
|
||
varobj_delete (var, NULL, 0);
|
||
}
|
||
else
|
||
{
|
||
tmp_var->obj_name = varobj_gen_name ();
|
||
}
|
||
install_variable (tmp_var);
|
||
*var_handle = tmp_var;
|
||
var = *var_handle;
|
||
*type_changed = 1;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
*type_changed = 0;
|
||
}
|
||
|
||
return (*var->root->lang->value_of_root) (var_handle);
|
||
}
|
||
|
||
/* What is the ``struct value *'' for the INDEX'th child of PARENT? */
|
||
static struct value *
|
||
value_of_child (struct varobj *parent, int index)
|
||
{
|
||
struct value *value;
|
||
|
||
value = (*parent->root->lang->value_of_child) (parent, index);
|
||
|
||
return value;
|
||
}
|
||
|
||
/* Is this variable editable? Use the variable's type to make
|
||
this determination. */
|
||
static int
|
||
variable_editable (struct varobj *var)
|
||
{
|
||
return (*var->root->lang->variable_editable) (var);
|
||
}
|
||
|
||
/* GDB already has a command called "value_of_variable". Sigh. */
|
||
static char *
|
||
my_value_of_variable (struct varobj *var)
|
||
{
|
||
return (*var->root->lang->value_of_variable) (var);
|
||
}
|
||
|
||
/* Return non-zero if changes in value of VAR
|
||
must be detected and reported by -var-update.
|
||
Return zero is -var-update should never report
|
||
changes of such values. This makes sense for structures
|
||
(since the changes in children values will be reported separately),
|
||
or for artifical objects (like 'public' pseudo-field in C++).
|
||
|
||
Return value of 0 means that gdb need not call value_fetch_lazy
|
||
for the value of this variable object. */
|
||
static int
|
||
varobj_value_is_changeable_p (struct varobj *var)
|
||
{
|
||
int r;
|
||
struct type *type;
|
||
|
||
if (CPLUS_FAKE_CHILD (var))
|
||
return 0;
|
||
|
||
type = get_type (var);
|
||
|
||
switch (TYPE_CODE (type))
|
||
{
|
||
case TYPE_CODE_STRUCT:
|
||
case TYPE_CODE_UNION:
|
||
case TYPE_CODE_ARRAY:
|
||
r = 0;
|
||
break;
|
||
|
||
default:
|
||
r = 1;
|
||
}
|
||
|
||
return r;
|
||
}
|
||
|
||
/* C */
|
||
static int
|
||
c_number_of_children (struct varobj *var)
|
||
{
|
||
struct type *type;
|
||
struct type *target;
|
||
int children;
|
||
|
||
type = get_type (var);
|
||
target = get_target_type (type);
|
||
children = 0;
|
||
|
||
switch (TYPE_CODE (type))
|
||
{
|
||
case TYPE_CODE_ARRAY:
|
||
if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0
|
||
&& TYPE_ARRAY_UPPER_BOUND_TYPE (type) != BOUND_CANNOT_BE_DETERMINED)
|
||
children = TYPE_LENGTH (type) / TYPE_LENGTH (target);
|
||
else
|
||
/* If we don't know how many elements there are, don't display
|
||
any. */
|
||
children = 0;
|
||
break;
|
||
|
||
case TYPE_CODE_STRUCT:
|
||
case TYPE_CODE_UNION:
|
||
children = TYPE_NFIELDS (type);
|
||
break;
|
||
|
||
case TYPE_CODE_PTR:
|
||
/* This is where things get complicated. All pointers have one child.
|
||
Except, of course, for struct and union ptr, which we automagically
|
||
dereference for the user, and function ptrs which have no children.
|
||
We also don't dereference void* as we don't know what to show.
|
||
We can show char* so we allow it to be dereferenced. If you decide
|
||
to test for it, please mind that a little magic is necessary to
|
||
properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and
|
||
TYPE_NAME == "char" */
|
||
|
||
switch (TYPE_CODE (target))
|
||
{
|
||
case TYPE_CODE_STRUCT:
|
||
case TYPE_CODE_UNION:
|
||
children = TYPE_NFIELDS (target);
|
||
break;
|
||
|
||
case TYPE_CODE_FUNC:
|
||
case TYPE_CODE_VOID:
|
||
children = 0;
|
||
break;
|
||
|
||
default:
|
||
children = 1;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
/* Other types have no children */
|
||
break;
|
||
}
|
||
|
||
return children;
|
||
}
|
||
|
||
static char *
|
||
c_name_of_variable (struct varobj *parent)
|
||
{
|
||
return savestring (parent->name, strlen (parent->name));
|
||
}
|
||
|
||
/* Return the value of element TYPE_INDEX of a structure
|
||
value VALUE. VALUE's type should be a structure,
|
||
or union, or a typedef to struct/union.
|
||
|
||
Returns NULL if getting the value fails. Never throws. */
|
||
static struct value *
|
||
value_struct_element_index (struct value *value, int type_index)
|
||
{
|
||
struct value *result = NULL;
|
||
volatile struct gdb_exception e;
|
||
|
||
struct type *type = value_type (value);
|
||
type = check_typedef (type);
|
||
|
||
gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT
|
||
|| TYPE_CODE (type) == TYPE_CODE_UNION);
|
||
|
||
TRY_CATCH (e, RETURN_MASK_ERROR)
|
||
{
|
||
if (TYPE_FIELD_STATIC (type, type_index))
|
||
result = value_static_field (type, type_index);
|
||
else
|
||
result = value_primitive_field (value, 0, type_index, type);
|
||
}
|
||
if (e.reason < 0)
|
||
{
|
||
return NULL;
|
||
}
|
||
else
|
||
{
|
||
return result;
|
||
}
|
||
}
|
||
|
||
/* Obtain the information about child INDEX of the variable
|
||
object PARENT.
|
||
If CNAME is not null, sets *CNAME to the name of the child relative
|
||
to the parent.
|
||
If CVALUE is not null, sets *CVALUE to the value of the child.
|
||
If CTYPE is not null, sets *CTYPE to the type of the child.
|
||
|
||
If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding
|
||
information cannot be determined, set *CNAME, *CVALUE, or *CTYPE
|
||
to NULL. */
|
||
static void
|
||
c_describe_child (struct varobj *parent, int index,
|
||
char **cname, struct value **cvalue, struct type **ctype)
|
||
{
|
||
struct value *value = parent->value;
|
||
struct type *type = get_type (parent);
|
||
|
||
if (cname)
|
||
*cname = NULL;
|
||
if (cvalue)
|
||
*cvalue = NULL;
|
||
if (ctype)
|
||
*ctype = NULL;
|
||
|
||
/* Pointers to structures are treated just like
|
||
structures when accessing children. */
|
||
if (TYPE_CODE (type) == TYPE_CODE_PTR)
|
||
{
|
||
struct type *target_type = get_target_type (type);
|
||
if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT
|
||
|| TYPE_CODE (target_type) == TYPE_CODE_UNION)
|
||
{
|
||
if (value)
|
||
gdb_value_ind (value, &value);
|
||
type = target_type;
|
||
}
|
||
}
|
||
|
||
switch (TYPE_CODE (type))
|
||
{
|
||
case TYPE_CODE_ARRAY:
|
||
if (cname)
|
||
*cname = xstrprintf ("%d", index
|
||
+ TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)));
|
||
|
||
if (cvalue && value)
|
||
{
|
||
int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type));
|
||
struct value *indval =
|
||
value_from_longest (builtin_type_int, (LONGEST) real_index);
|
||
gdb_value_subscript (value, indval, cvalue);
|
||
}
|
||
|
||
if (ctype)
|
||
*ctype = get_target_type (type);
|
||
|
||
break;
|
||
|
||
case TYPE_CODE_STRUCT:
|
||
case TYPE_CODE_UNION:
|
||
if (cname)
|
||
{
|
||
char *string = TYPE_FIELD_NAME (type, index);
|
||
*cname = savestring (string, strlen (string));
|
||
}
|
||
|
||
if (cvalue && value)
|
||
{
|
||
/* For C, varobj index is the same as type index. */
|
||
*cvalue = value_struct_element_index (value, index);
|
||
}
|
||
|
||
if (ctype)
|
||
*ctype = TYPE_FIELD_TYPE (type, index);
|
||
|
||
break;
|
||
|
||
case TYPE_CODE_PTR:
|
||
if (cname)
|
||
*cname = xstrprintf ("*%s", parent->name);
|
||
|
||
if (cvalue && value)
|
||
gdb_value_ind (value, cvalue);
|
||
|
||
if (ctype)
|
||
*ctype = get_target_type (type);
|
||
|
||
break;
|
||
|
||
default:
|
||
/* This should not happen */
|
||
if (cname)
|
||
*cname = xstrdup ("???");
|
||
/* Don't set value and type, we don't know then. */
|
||
}
|
||
}
|
||
|
||
static char *
|
||
c_name_of_child (struct varobj *parent, int index)
|
||
{
|
||
char *name;
|
||
c_describe_child (parent, index, &name, NULL, NULL);
|
||
return name;
|
||
}
|
||
|
||
static struct value *
|
||
c_value_of_root (struct varobj **var_handle)
|
||
{
|
||
struct value *new_val = NULL;
|
||
struct varobj *var = *var_handle;
|
||
struct frame_info *fi;
|
||
int within_scope;
|
||
|
||
/* Only root variables can be updated... */
|
||
if (!is_root_p (var))
|
||
/* Not a root var */
|
||
return NULL;
|
||
|
||
|
||
/* Determine whether the variable is still around. */
|
||
if (var->root->valid_block == NULL)
|
||
within_scope = 1;
|
||
else
|
||
{
|
||
reinit_frame_cache ();
|
||
fi = frame_find_by_id (var->root->frame);
|
||
within_scope = fi != NULL;
|
||
/* FIXME: select_frame could fail */
|
||
if (fi)
|
||
{
|
||
CORE_ADDR pc = get_frame_pc (fi);
|
||
if (pc < BLOCK_START (var->root->valid_block) ||
|
||
pc >= BLOCK_END (var->root->valid_block))
|
||
within_scope = 0;
|
||
select_frame (fi);
|
||
}
|
||
}
|
||
|
||
if (within_scope)
|
||
{
|
||
/* We need to catch errors here, because if evaluate
|
||
expression fails we just want to make val->error = 1 and
|
||
go on */
|
||
if (gdb_evaluate_expression (var->root->exp, &new_val))
|
||
{
|
||
var->error = 0;
|
||
release_value (new_val);
|
||
}
|
||
else
|
||
var->error = 1;
|
||
|
||
return new_val;
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
static struct value *
|
||
c_value_of_child (struct varobj *parent, int index)
|
||
{
|
||
struct value *value = NULL;
|
||
c_describe_child (parent, index, NULL, &value, NULL);
|
||
if (value != NULL)
|
||
release_value (value);
|
||
|
||
return value;
|
||
}
|
||
|
||
static struct type *
|
||
c_type_of_child (struct varobj *parent, int index)
|
||
{
|
||
struct type *type = NULL;
|
||
c_describe_child (parent, index, NULL, NULL, &type);
|
||
return type;
|
||
}
|
||
|
||
static int
|
||
c_variable_editable (struct varobj *var)
|
||
{
|
||
switch (TYPE_CODE (get_type (var)))
|
||
{
|
||
case TYPE_CODE_STRUCT:
|
||
case TYPE_CODE_UNION:
|
||
case TYPE_CODE_ARRAY:
|
||
case TYPE_CODE_FUNC:
|
||
case TYPE_CODE_METHOD:
|
||
return 0;
|
||
break;
|
||
|
||
default:
|
||
return 1;
|
||
break;
|
||
}
|
||
}
|
||
|
||
static char *
|
||
c_value_of_variable (struct varobj *var)
|
||
{
|
||
/* BOGUS: if val_print sees a struct/class, or a reference to one,
|
||
it will print out its children instead of "{...}". So we need to
|
||
catch that case explicitly. */
|
||
struct type *type = get_type (var);
|
||
|
||
/* Strip top-level references. */
|
||
while (TYPE_CODE (type) == TYPE_CODE_REF)
|
||
type = check_typedef (TYPE_TARGET_TYPE (type));
|
||
|
||
switch (TYPE_CODE (type))
|
||
{
|
||
case TYPE_CODE_STRUCT:
|
||
case TYPE_CODE_UNION:
|
||
return xstrdup ("{...}");
|
||
/* break; */
|
||
|
||
case TYPE_CODE_ARRAY:
|
||
{
|
||
char *number;
|
||
number = xstrprintf ("[%d]", var->num_children);
|
||
return (number);
|
||
}
|
||
/* break; */
|
||
|
||
default:
|
||
{
|
||
if (var->value == NULL)
|
||
{
|
||
/* This can happen if we attempt to get the value of a struct
|
||
member when the parent is an invalid pointer. This is an
|
||
error condition, so we should tell the caller. */
|
||
return NULL;
|
||
}
|
||
else
|
||
{
|
||
long dummy;
|
||
struct ui_file *stb = mem_fileopen ();
|
||
struct cleanup *old_chain = make_cleanup_ui_file_delete (stb);
|
||
char *thevalue;
|
||
|
||
gdb_assert (varobj_value_is_changeable_p (var));
|
||
gdb_assert (!value_lazy (var->value));
|
||
common_val_print (var->value, stb,
|
||
format_code[(int) var->format], 1, 0, 0);
|
||
thevalue = ui_file_xstrdup (stb, &dummy);
|
||
do_cleanups (old_chain);
|
||
return thevalue;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
/* C++ */
|
||
|
||
static int
|
||
cplus_number_of_children (struct varobj *var)
|
||
{
|
||
struct type *type;
|
||
int children, dont_know;
|
||
|
||
dont_know = 1;
|
||
children = 0;
|
||
|
||
if (!CPLUS_FAKE_CHILD (var))
|
||
{
|
||
type = get_type_deref (var);
|
||
|
||
if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) ||
|
||
((TYPE_CODE (type)) == TYPE_CODE_UNION))
|
||
{
|
||
int kids[3];
|
||
|
||
cplus_class_num_children (type, kids);
|
||
if (kids[v_public] != 0)
|
||
children++;
|
||
if (kids[v_private] != 0)
|
||
children++;
|
||
if (kids[v_protected] != 0)
|
||
children++;
|
||
|
||
/* Add any baseclasses */
|
||
children += TYPE_N_BASECLASSES (type);
|
||
dont_know = 0;
|
||
|
||
/* FIXME: save children in var */
|
||
}
|
||
}
|
||
else
|
||
{
|
||
int kids[3];
|
||
|
||
type = get_type_deref (var->parent);
|
||
|
||
cplus_class_num_children (type, kids);
|
||
if (strcmp (var->name, "public") == 0)
|
||
children = kids[v_public];
|
||
else if (strcmp (var->name, "private") == 0)
|
||
children = kids[v_private];
|
||
else
|
||
children = kids[v_protected];
|
||
dont_know = 0;
|
||
}
|
||
|
||
if (dont_know)
|
||
children = c_number_of_children (var);
|
||
|
||
return children;
|
||
}
|
||
|
||
/* Compute # of public, private, and protected variables in this class.
|
||
That means we need to descend into all baseclasses and find out
|
||
how many are there, too. */
|
||
static void
|
||
cplus_class_num_children (struct type *type, int children[3])
|
||
{
|
||
int i;
|
||
|
||
children[v_public] = 0;
|
||
children[v_private] = 0;
|
||
children[v_protected] = 0;
|
||
|
||
for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++)
|
||
{
|
||
/* If we have a virtual table pointer, omit it. */
|
||
if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i)
|
||
continue;
|
||
|
||
if (TYPE_FIELD_PROTECTED (type, i))
|
||
children[v_protected]++;
|
||
else if (TYPE_FIELD_PRIVATE (type, i))
|
||
children[v_private]++;
|
||
else
|
||
children[v_public]++;
|
||
}
|
||
}
|
||
|
||
static char *
|
||
cplus_name_of_variable (struct varobj *parent)
|
||
{
|
||
return c_name_of_variable (parent);
|
||
}
|
||
|
||
static char *
|
||
cplus_name_of_child (struct varobj *parent, int index)
|
||
{
|
||
char *name;
|
||
struct type *type;
|
||
|
||
if (CPLUS_FAKE_CHILD (parent))
|
||
{
|
||
/* Looking for children of public, private, or protected. */
|
||
type = get_type_deref (parent->parent);
|
||
}
|
||
else
|
||
type = get_type_deref (parent);
|
||
|
||
name = NULL;
|
||
switch (TYPE_CODE (type))
|
||
{
|
||
case TYPE_CODE_STRUCT:
|
||
case TYPE_CODE_UNION:
|
||
if (CPLUS_FAKE_CHILD (parent))
|
||
{
|
||
/* The fields of the class type are ordered as they
|
||
appear in the class. We are given an index for a
|
||
particular access control type ("public","protected",
|
||
or "private"). We must skip over fields that don't
|
||
have the access control we are looking for to properly
|
||
find the indexed field. */
|
||
int type_index = TYPE_N_BASECLASSES (type);
|
||
if (strcmp (parent->name, "private") == 0)
|
||
{
|
||
while (index >= 0)
|
||
{
|
||
if (TYPE_VPTR_BASETYPE (type) == type
|
||
&& type_index == TYPE_VPTR_FIELDNO (type))
|
||
; /* ignore vptr */
|
||
else if (TYPE_FIELD_PRIVATE (type, type_index))
|
||
--index;
|
||
++type_index;
|
||
}
|
||
--type_index;
|
||
}
|
||
else if (strcmp (parent->name, "protected") == 0)
|
||
{
|
||
while (index >= 0)
|
||
{
|
||
if (TYPE_VPTR_BASETYPE (type) == type
|
||
&& type_index == TYPE_VPTR_FIELDNO (type))
|
||
; /* ignore vptr */
|
||
else if (TYPE_FIELD_PROTECTED (type, type_index))
|
||
--index;
|
||
++type_index;
|
||
}
|
||
--type_index;
|
||
}
|
||
else
|
||
{
|
||
while (index >= 0)
|
||
{
|
||
if (TYPE_VPTR_BASETYPE (type) == type
|
||
&& type_index == TYPE_VPTR_FIELDNO (type))
|
||
; /* ignore vptr */
|
||
else if (!TYPE_FIELD_PRIVATE (type, type_index) &&
|
||
!TYPE_FIELD_PROTECTED (type, type_index))
|
||
--index;
|
||
++type_index;
|
||
}
|
||
--type_index;
|
||
}
|
||
|
||
name = TYPE_FIELD_NAME (type, type_index);
|
||
}
|
||
else if (index < TYPE_N_BASECLASSES (type))
|
||
/* We are looking up the name of a base class */
|
||
name = TYPE_FIELD_NAME (type, index);
|
||
else
|
||
{
|
||
int children[3];
|
||
cplus_class_num_children(type, children);
|
||
|
||
/* Everything beyond the baseclasses can
|
||
only be "public", "private", or "protected"
|
||
|
||
The special "fake" children are always output by varobj in
|
||
this order. So if INDEX == 2, it MUST be "protected". */
|
||
index -= TYPE_N_BASECLASSES (type);
|
||
switch (index)
|
||
{
|
||
case 0:
|
||
if (children[v_public] > 0)
|
||
name = "public";
|
||
else if (children[v_private] > 0)
|
||
name = "private";
|
||
else
|
||
name = "protected";
|
||
break;
|
||
case 1:
|
||
if (children[v_public] > 0)
|
||
{
|
||
if (children[v_private] > 0)
|
||
name = "private";
|
||
else
|
||
name = "protected";
|
||
}
|
||
else if (children[v_private] > 0)
|
||
name = "protected";
|
||
break;
|
||
case 2:
|
||
/* Must be protected */
|
||
name = "protected";
|
||
break;
|
||
default:
|
||
/* error! */
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
if (name == NULL)
|
||
return c_name_of_child (parent, index);
|
||
else
|
||
{
|
||
if (name != NULL)
|
||
name = savestring (name, strlen (name));
|
||
}
|
||
|
||
return name;
|
||
}
|
||
|
||
static struct value *
|
||
cplus_value_of_root (struct varobj **var_handle)
|
||
{
|
||
return c_value_of_root (var_handle);
|
||
}
|
||
|
||
static struct value *
|
||
cplus_value_of_child (struct varobj *parent, int index)
|
||
{
|
||
struct type *type;
|
||
struct value *value;
|
||
|
||
if (CPLUS_FAKE_CHILD (parent))
|
||
type = get_type_deref (parent->parent);
|
||
else
|
||
type = get_type_deref (parent);
|
||
|
||
value = NULL;
|
||
|
||
if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) ||
|
||
((TYPE_CODE (type)) == TYPE_CODE_UNION))
|
||
{
|
||
if (CPLUS_FAKE_CHILD (parent))
|
||
{
|
||
char *name;
|
||
struct value *temp = parent->parent->value;
|
||
|
||
if (temp == NULL)
|
||
return NULL;
|
||
|
||
name = name_of_child (parent, index);
|
||
gdb_value_struct_elt (NULL, &value, &temp, NULL, name, NULL,
|
||
"cplus_structure");
|
||
if (value != NULL)
|
||
release_value (value);
|
||
|
||
xfree (name);
|
||
}
|
||
else if (index >= TYPE_N_BASECLASSES (type))
|
||
{
|
||
/* public, private, or protected */
|
||
return NULL;
|
||
}
|
||
else
|
||
{
|
||
/* Baseclass */
|
||
if (parent->value != NULL)
|
||
{
|
||
struct value *temp = NULL;
|
||
|
||
/* No special processing for references is needed --
|
||
value_cast below handles references. */
|
||
if (TYPE_CODE (value_type (parent->value)) == TYPE_CODE_PTR)
|
||
{
|
||
if (!gdb_value_ind (parent->value, &temp))
|
||
return NULL;
|
||
}
|
||
else
|
||
temp = parent->value;
|
||
|
||
if (temp != NULL)
|
||
{
|
||
value = value_cast (TYPE_FIELD_TYPE (type, index), temp);
|
||
release_value (value);
|
||
}
|
||
else
|
||
{
|
||
/* We failed to evaluate the parent's value, so don't even
|
||
bother trying to evaluate this child. */
|
||
return NULL;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
if (value == NULL)
|
||
return c_value_of_child (parent, index);
|
||
|
||
return value;
|
||
}
|
||
|
||
static struct type *
|
||
cplus_type_of_child (struct varobj *parent, int index)
|
||
{
|
||
struct type *type, *t;
|
||
|
||
if (CPLUS_FAKE_CHILD (parent))
|
||
{
|
||
/* Looking for the type of a child of public, private, or protected. */
|
||
t = get_type_deref (parent->parent);
|
||
}
|
||
else
|
||
t = get_type_deref (parent);
|
||
|
||
type = NULL;
|
||
switch (TYPE_CODE (t))
|
||
{
|
||
case TYPE_CODE_STRUCT:
|
||
case TYPE_CODE_UNION:
|
||
if (CPLUS_FAKE_CHILD (parent))
|
||
{
|
||
char *name = cplus_name_of_child (parent, index);
|
||
type = lookup_struct_elt_type (t, name, 0);
|
||
xfree (name);
|
||
}
|
||
else if (index < TYPE_N_BASECLASSES (t))
|
||
type = TYPE_FIELD_TYPE (t, index);
|
||
else
|
||
{
|
||
/* special */
|
||
return NULL;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
if (type == NULL)
|
||
return c_type_of_child (parent, index);
|
||
|
||
return type;
|
||
}
|
||
|
||
static int
|
||
cplus_variable_editable (struct varobj *var)
|
||
{
|
||
if (CPLUS_FAKE_CHILD (var))
|
||
return 0;
|
||
|
||
return c_variable_editable (var);
|
||
}
|
||
|
||
static char *
|
||
cplus_value_of_variable (struct varobj *var)
|
||
{
|
||
|
||
/* If we have one of our special types, don't print out
|
||
any value. */
|
||
if (CPLUS_FAKE_CHILD (var))
|
||
return xstrdup ("");
|
||
|
||
return c_value_of_variable (var);
|
||
}
|
||
|
||
/* Java */
|
||
|
||
static int
|
||
java_number_of_children (struct varobj *var)
|
||
{
|
||
return cplus_number_of_children (var);
|
||
}
|
||
|
||
static char *
|
||
java_name_of_variable (struct varobj *parent)
|
||
{
|
||
char *p, *name;
|
||
|
||
name = cplus_name_of_variable (parent);
|
||
/* If the name has "-" in it, it is because we
|
||
needed to escape periods in the name... */
|
||
p = name;
|
||
|
||
while (*p != '\000')
|
||
{
|
||
if (*p == '-')
|
||
*p = '.';
|
||
p++;
|
||
}
|
||
|
||
return name;
|
||
}
|
||
|
||
static char *
|
||
java_name_of_child (struct varobj *parent, int index)
|
||
{
|
||
char *name, *p;
|
||
|
||
name = cplus_name_of_child (parent, index);
|
||
/* Escape any periods in the name... */
|
||
p = name;
|
||
|
||
while (*p != '\000')
|
||
{
|
||
if (*p == '.')
|
||
*p = '-';
|
||
p++;
|
||
}
|
||
|
||
return name;
|
||
}
|
||
|
||
static struct value *
|
||
java_value_of_root (struct varobj **var_handle)
|
||
{
|
||
return cplus_value_of_root (var_handle);
|
||
}
|
||
|
||
static struct value *
|
||
java_value_of_child (struct varobj *parent, int index)
|
||
{
|
||
return cplus_value_of_child (parent, index);
|
||
}
|
||
|
||
static struct type *
|
||
java_type_of_child (struct varobj *parent, int index)
|
||
{
|
||
return cplus_type_of_child (parent, index);
|
||
}
|
||
|
||
static int
|
||
java_variable_editable (struct varobj *var)
|
||
{
|
||
return cplus_variable_editable (var);
|
||
}
|
||
|
||
static char *
|
||
java_value_of_variable (struct varobj *var)
|
||
{
|
||
return cplus_value_of_variable (var);
|
||
}
|
||
|
||
extern void _initialize_varobj (void);
|
||
void
|
||
_initialize_varobj (void)
|
||
{
|
||
int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE;
|
||
|
||
varobj_table = xmalloc (sizeof_table);
|
||
memset (varobj_table, 0, sizeof_table);
|
||
|
||
add_setshow_zinteger_cmd ("debugvarobj", class_maintenance,
|
||
&varobjdebug, _("\
|
||
Set varobj debugging."), _("\
|
||
Show varobj debugging."), _("\
|
||
When non-zero, varobj debugging is enabled."),
|
||
NULL,
|
||
show_varobjdebug,
|
||
&setlist, &showlist);
|
||
}
|