--- /dev/null
+/* varobj support for C and C++.
+
+ Copyright (C) 1999-2013 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include "defs.h"
+#include "value.h"
+#include "varobj.h"
+#include "gdbthread.h"
+#include "valprint.h"
+
+static void cplus_class_num_children (struct type *type, int children[3]);
+
+/* The names of varobjs representing anonymous structs or unions. */
+#define ANONYMOUS_STRUCT_NAME _("<anonymous struct>")
+#define ANONYMOUS_UNION_NAME _("<anonymous union>")
+
+/* Does CHILD represent a child with no name? This happens when
+ the child is an anonmous struct or union and it has no field name
+ in its parent variable.
+
+ This has already been determined by *_describe_child. The easiest
+ thing to do is to compare the child's name with ANONYMOUS_*_NAME. */
+
+int
+varobj_is_anonymous_child (struct varobj *child)
+{
+ return (strcmp (child->name, ANONYMOUS_STRUCT_NAME) == 0
+ || strcmp (child->name, ANONYMOUS_UNION_NAME) == 0);
+}
+
+/* Given the value and the type of a variable object,
+ adjust the value and type to those necessary
+ for getting children of the variable object.
+ This includes dereferencing top-level references
+ to all types and dereferencing pointers to
+ structures.
+
+ If LOOKUP_ACTUAL_TYPE is set the enclosing type of the
+ value will be fetched and if it differs from static type
+ the value will be casted to it.
+
+ Both TYPE and *TYPE should be non-null. VALUE
+ can be null if we want to only translate type.
+ *VALUE can be null as well -- if the parent
+ value is not known.
+
+ If WAS_PTR is not NULL, set *WAS_PTR to 0 or 1
+ depending on whether pointer was dereferenced
+ in this function. */
+
+static void
+adjust_value_for_child_access (struct value **value,
+ struct type **type,
+ int *was_ptr,
+ int lookup_actual_type)
+{
+ gdb_assert (type && *type);
+
+ if (was_ptr)
+ *was_ptr = 0;
+
+ *type = check_typedef (*type);
+
+ /* The type of value stored in varobj, that is passed
+ to us, is already supposed to be
+ reference-stripped. */
+
+ gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF);
+
+ /* Pointers to structures are treated just like
+ structures when accessing children. Don't
+ dererences pointers to other types. */
+ 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 && *value)
+ {
+ volatile struct gdb_exception except;
+
+ TRY_CATCH (except, RETURN_MASK_ERROR)
+ {
+ *value = value_ind (*value);
+ }
+
+ if (except.reason < 0)
+ *value = NULL;
+ }
+ *type = target_type;
+ if (was_ptr)
+ *was_ptr = 1;
+ }
+ }
+
+ /* The 'get_target_type' function calls check_typedef on
+ result, so we can immediately check type code. No
+ need to call check_typedef here. */
+
+ /* Access a real type of the value (if necessary and possible). */
+ if (value && *value && lookup_actual_type)
+ {
+ struct type *enclosing_type;
+ int real_type_found = 0;
+
+ enclosing_type = value_actual_type (*value, 1, &real_type_found);
+ if (real_type_found)
+ {
+ *type = enclosing_type;
+ *value = value_cast (enclosing_type, *value);
+ }
+ }
+}
+
+/* C */
+
+static int
+c_number_of_children (struct varobj *var)
+{
+ struct type *type = varobj_get_value_type (var);
+ int children = 0;
+ struct type *target;
+
+ adjust_value_for_child_access (NULL, &type, NULL, 0);
+ target = get_target_type (type);
+
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_ARRAY:
+ if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0
+ && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
+ 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:
+ /* The type here is a pointer to non-struct. Typically, pointers
+ have one child, except for function ptrs, which have no children,
+ and except for 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". */
+ if (TYPE_CODE (target) == TYPE_CODE_FUNC
+ || TYPE_CODE (target) == TYPE_CODE_VOID)
+ children = 0;
+ else
+ children = 1;
+ break;
+
+ default:
+ /* Other types have no children. */
+ break;
+ }
+
+ return children;
+}
+
+static char *
+c_name_of_variable (struct varobj *parent)
+{
+ return xstrdup (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 (field_is_static (&TYPE_FIELD (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,
+ char **cfull_expression)
+{
+ struct value *value = parent->value;
+ struct type *type = varobj_get_value_type (parent);
+ char *parent_expression = NULL;
+ int was_ptr;
+ volatile struct gdb_exception except;
+
+ if (cname)
+ *cname = NULL;
+ if (cvalue)
+ *cvalue = NULL;
+ if (ctype)
+ *ctype = NULL;
+ if (cfull_expression)
+ {
+ *cfull_expression = NULL;
+ parent_expression
+ = varobj_get_path_expr (varobj_get_path_expr_parent (parent));
+ }
+ adjust_value_for_child_access (&value, &type, &was_ptr, 0);
+
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_ARRAY:
+ if (cname)
+ *cname
+ = xstrdup (int_string (index
+ + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)),
+ 10, 1, 0, 0));
+
+ if (cvalue && value)
+ {
+ int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type));
+
+ TRY_CATCH (except, RETURN_MASK_ERROR)
+ {
+ *cvalue = value_subscript (value, real_index);
+ }
+ }
+
+ if (ctype)
+ *ctype = get_target_type (type);
+
+ if (cfull_expression)
+ *cfull_expression =
+ xstrprintf ("(%s)[%s]", parent_expression,
+ int_string (index
+ + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)),
+ 10, 1, 0, 0));
+
+
+ break;
+
+ case TYPE_CODE_STRUCT:
+ case TYPE_CODE_UNION:
+ {
+ const char *field_name;
+
+ /* If the type is anonymous and the field has no name,
+ set an appropriate name. */
+ field_name = TYPE_FIELD_NAME (type, index);
+ if (field_name == NULL || *field_name == '\0')
+ {
+ if (cname)
+ {
+ if (TYPE_CODE (TYPE_FIELD_TYPE (type, index))
+ == TYPE_CODE_STRUCT)
+ *cname = xstrdup (ANONYMOUS_STRUCT_NAME);
+ else
+ *cname = xstrdup (ANONYMOUS_UNION_NAME);
+ }
+
+ if (cfull_expression)
+ *cfull_expression = xstrdup ("");
+ }
+ else
+ {
+ if (cname)
+ *cname = xstrdup (field_name);
+
+ if (cfull_expression)
+ {
+ char *join = was_ptr ? "->" : ".";
+
+ *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression,
+ join, field_name);
+ }
+ }
+
+ 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)
+ {
+ TRY_CATCH (except, RETURN_MASK_ERROR)
+ {
+ *cvalue = value_ind (value);
+ }
+
+ if (except.reason < 0)
+ *cvalue = NULL;
+ }
+
+ /* Don't use get_target_type because it calls
+ check_typedef and here, we want to show the true
+ declared type of the variable. */
+ if (ctype)
+ *ctype = TYPE_TARGET_TYPE (type);
+
+ if (cfull_expression)
+ *cfull_expression = xstrprintf ("*(%s)", parent_expression);
+
+ break;
+
+ default:
+ /* This should not happen. */
+ if (cname)
+ *cname = xstrdup ("???");
+ if (cfull_expression)
+ *cfull_expression = 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, NULL);
+ return name;
+}
+
+static char *
+c_path_expr_of_child (struct varobj *child)
+{
+ c_describe_child (child->parent, child->index, NULL, NULL, NULL,
+ &child->path_expr);
+ return child->path_expr;
+}
+
+static struct value *
+c_value_of_child (struct varobj *parent, int index)
+{
+ struct value *value = NULL;
+
+ c_describe_child (parent, index, NULL, &value, NULL, NULL);
+ 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, NULL);
+ return type;
+}
+
+/* This returns the type of the variable. It also skips past typedefs
+ to return the real type of the variable. */
+
+static struct type *
+get_type (struct varobj *var)
+{
+ struct type *type;
+
+ type = var->type;
+ if (type != NULL)
+ type = check_typedef (type);
+
+ return type;
+}
+
+static char *
+c_value_of_variable (struct varobj *var, enum varobj_display_formats format)
+{
+ /* 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
+ {
+ if (var->not_fetched && value_lazy (var->value))
+ /* Frozen variable and no value yet. We don't
+ implicitly fetch the value. MI response will
+ use empty string for the value, which is OK. */
+ return NULL;
+
+ gdb_assert (varobj_value_is_changeable_p (var));
+ gdb_assert (!value_lazy (var->value));
+
+ /* If the specified format is the current one,
+ we can reuse print_value. */
+ if (format == var->format)
+ return xstrdup (var->print_value);
+ else
+ return varobj_value_get_print_value (var->value, format, var);
+ }
+ }
+ }
+}
+\f
+
+/* varobj operations for c. */
+
+const struct lang_varobj_ops c_varobj_ops =
+{
+ c_number_of_children,
+ c_name_of_variable,
+ c_name_of_child,
+ c_path_expr_of_child,
+ c_value_of_child,
+ c_type_of_child,
+ c_value_of_variable,
+ varobj_default_value_is_changeable_p,
+ NULL /* value_has_mutated */
+};
+
+/* A little convenience enum for dealing with C++/Java. */
+enum vsections
+{
+ v_public = 0, v_private, v_protected
+};
+
+/* C++ */
+
+static int
+cplus_number_of_children (struct varobj *var)
+{
+ struct value *value = NULL;
+ struct type *type;
+ int children, dont_know;
+ int lookup_actual_type = 0;
+ struct value_print_options opts;
+
+ dont_know = 1;
+ children = 0;
+
+ get_user_print_options (&opts);
+
+ if (!CPLUS_FAKE_CHILD (var))
+ {
+ type = varobj_get_value_type (var);
+
+ /* It is necessary to access a real type (via RTTI). */
+ if (opts.objectprint)
+ {
+ value = var->value;
+ lookup_actual_type = (TYPE_CODE (var->type) == TYPE_CODE_REF
+ || TYPE_CODE (var->type) == TYPE_CODE_PTR);
+ }
+ adjust_value_for_child_access (&value, &type, NULL, lookup_actual_type);
+
+ 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 = varobj_get_value_type (var->parent);
+
+ /* It is necessary to access a real type (via RTTI). */
+ if (opts.objectprint)
+ {
+ struct varobj *parent = var->parent;
+
+ value = parent->value;
+ lookup_actual_type = (TYPE_CODE (parent->type) == TYPE_CODE_REF
+ || TYPE_CODE (parent->type) == TYPE_CODE_PTR);
+ }
+ adjust_value_for_child_access (&value, &type, NULL, lookup_actual_type);
+
+ 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, vptr_fieldno;
+ struct type *basetype = NULL;
+
+ children[v_public] = 0;
+ children[v_private] = 0;
+ children[v_protected] = 0;
+
+ vptr_fieldno = get_vptr_fieldno (type, &basetype);
+ for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++)
+ {
+ /* If we have a virtual table pointer, omit it. Even if virtual
+ table pointers are not specifically marked in the debug info,
+ they should be artificial. */
+ if ((type == basetype && i == vptr_fieldno)
+ || TYPE_FIELD_ARTIFICIAL (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);
+}
+
+enum accessibility { private_field, protected_field, public_field };
+
+/* Check if field INDEX of TYPE has the specified accessibility.
+ Return 0 if so and 1 otherwise. */
+
+static int
+match_accessibility (struct type *type, int index, enum accessibility acc)
+{
+ if (acc == private_field && TYPE_FIELD_PRIVATE (type, index))
+ return 1;
+ else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index))
+ return 1;
+ else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index)
+ && !TYPE_FIELD_PROTECTED (type, index))
+ return 1;
+ else
+ return 0;
+}
+
+static void
+cplus_describe_child (struct varobj *parent, int index,
+ char **cname, struct value **cvalue, struct type **ctype,
+ char **cfull_expression)
+{
+ struct value *value;
+ struct type *type;
+ int was_ptr;
+ int lookup_actual_type = 0;
+ char *parent_expression = NULL;
+ struct varobj *var;
+ struct value_print_options opts;
+
+ if (cname)
+ *cname = NULL;
+ if (cvalue)
+ *cvalue = NULL;
+ if (ctype)
+ *ctype = NULL;
+ if (cfull_expression)
+ *cfull_expression = NULL;
+
+ get_user_print_options (&opts);
+
+ var = (CPLUS_FAKE_CHILD (parent)) ? parent->parent : parent;
+ if (opts.objectprint)
+ lookup_actual_type = (TYPE_CODE (var->type) == TYPE_CODE_REF
+ || TYPE_CODE (var->type) == TYPE_CODE_PTR);
+ value = var->value;
+ type = varobj_get_value_type (var);
+ if (cfull_expression)
+ parent_expression
+ = varobj_get_path_expr (varobj_get_path_expr_parent (var));
+
+ adjust_value_for_child_access (&value, &type, &was_ptr, lookup_actual_type);
+
+ if (TYPE_CODE (type) == TYPE_CODE_STRUCT
+ || TYPE_CODE (type) == TYPE_CODE_UNION)
+ {
+ char *join = was_ptr ? "->" : ".";
+
+ 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);
+ enum accessibility acc = public_field;
+ int vptr_fieldno;
+ struct type *basetype = NULL;
+ const char *field_name;
+
+ vptr_fieldno = get_vptr_fieldno (type, &basetype);
+ if (strcmp (parent->name, "private") == 0)
+ acc = private_field;
+ else if (strcmp (parent->name, "protected") == 0)
+ acc = protected_field;
+
+ while (index >= 0)
+ {
+ if ((type == basetype && type_index == vptr_fieldno)
+ || TYPE_FIELD_ARTIFICIAL (type, type_index))
+ ; /* ignore vptr */
+ else if (match_accessibility (type, type_index, acc))
+ --index;
+ ++type_index;
+ }
+ --type_index;
+
+ /* If the type is anonymous and the field has no name,
+ set an appopriate name. */
+ field_name = TYPE_FIELD_NAME (type, type_index);
+ if (field_name == NULL || *field_name == '\0')
+ {
+ if (cname)
+ {
+ if (TYPE_CODE (TYPE_FIELD_TYPE (type, type_index))
+ == TYPE_CODE_STRUCT)
+ *cname = xstrdup (ANONYMOUS_STRUCT_NAME);
+ else if (TYPE_CODE (TYPE_FIELD_TYPE (type, type_index))
+ == TYPE_CODE_UNION)
+ *cname = xstrdup (ANONYMOUS_UNION_NAME);
+ }
+
+ if (cfull_expression)
+ *cfull_expression = xstrdup ("");
+ }
+ else
+ {
+ if (cname)
+ *cname = xstrdup (TYPE_FIELD_NAME (type, type_index));
+
+ if (cfull_expression)
+ *cfull_expression
+ = xstrprintf ("((%s)%s%s)", parent_expression, join,
+ field_name);
+ }
+
+ if (cvalue && value)
+ *cvalue = value_struct_element_index (value, type_index);
+
+ if (ctype)
+ *ctype = TYPE_FIELD_TYPE (type, type_index);
+ }
+ else if (index < TYPE_N_BASECLASSES (type))
+ {
+ /* This is a baseclass. */
+ if (cname)
+ *cname = xstrdup (TYPE_FIELD_NAME (type, index));
+
+ if (cvalue && value)
+ *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value);
+
+ if (ctype)
+ {
+ *ctype = TYPE_FIELD_TYPE (type, index);
+ }
+
+ if (cfull_expression)
+ {
+ char *ptr = was_ptr ? "*" : "";
+
+ /* Cast the parent to the base' type. Note that in gdb,
+ expression like
+ (Base1)d
+ will create an lvalue, for all appearences, so we don't
+ need to use more fancy:
+ *(Base1*)(&d)
+ construct.
+
+ When we are in the scope of the base class or of one
+ of its children, the type field name will be interpreted
+ as a constructor, if it exists. Therefore, we must
+ indicate that the name is a class name by using the
+ 'class' keyword. See PR mi/11912 */
+ *cfull_expression = xstrprintf ("(%s(class %s%s) %s)",
+ ptr,
+ TYPE_FIELD_NAME (type, index),
+ ptr,
+ parent_expression);
+ }
+ }
+ else
+ {
+ char *access = NULL;
+ 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)
+ access = "public";
+ else if (children[v_private] > 0)
+ access = "private";
+ else
+ access = "protected";
+ break;
+ case 1:
+ if (children[v_public] > 0)
+ {
+ if (children[v_private] > 0)
+ access = "private";
+ else
+ access = "protected";
+ }
+ else if (children[v_private] > 0)
+ access = "protected";
+ break;
+ case 2:
+ /* Must be protected. */
+ access = "protected";
+ break;
+ default:
+ /* error! */
+ break;
+ }
+
+ gdb_assert (access);
+ if (cname)
+ *cname = xstrdup (access);
+
+ /* Value and type and full expression are null here. */
+ }
+ }
+ else
+ {
+ c_describe_child (parent, index, cname, cvalue, ctype, cfull_expression);
+ }
+}
+
+static char *
+cplus_name_of_child (struct varobj *parent, int index)
+{
+ char *name = NULL;
+
+ cplus_describe_child (parent, index, &name, NULL, NULL, NULL);
+ return name;
+}
+
+static char *
+cplus_path_expr_of_child (struct varobj *child)
+{
+ cplus_describe_child (child->parent, child->index, NULL, NULL, NULL,
+ &child->path_expr);
+ return child->path_expr;
+}
+
+static struct value *
+cplus_value_of_child (struct varobj *parent, int index)
+{
+ struct value *value = NULL;
+
+ cplus_describe_child (parent, index, NULL, &value, NULL, NULL);
+ return value;
+}
+
+static struct type *
+cplus_type_of_child (struct varobj *parent, int index)
+{
+ struct type *type = NULL;
+
+ cplus_describe_child (parent, index, NULL, NULL, &type, NULL);
+ return type;
+}
+
+static char *
+cplus_value_of_variable (struct varobj *var,
+ enum varobj_display_formats format)
+{
+
+ /* 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, format);
+}
+\f
+
+/* varobj operations for c++. */
+
+const struct lang_varobj_ops cplus_varobj_ops =
+{
+ cplus_number_of_children,
+ cplus_name_of_variable,
+ cplus_name_of_child,
+ cplus_path_expr_of_child,
+ cplus_value_of_child,
+ cplus_type_of_child,
+ cplus_value_of_variable,
+ varobj_default_value_is_changeable_p,
+ NULL /* value_has_mutated */
+};
+
+\f
#include "vec.h"
#include "gdbthread.h"
#include "inferior.h"
-#include "ada-varobj.h"
-#include "ada-lang.h"
#if HAVE_PYTHON
#include "python/python.h"
typedef int PyObject;
#endif
-/* The names of varobjs representing anonymous structs or unions. */
-#define ANONYMOUS_STRUCT_NAME _("<anonymous struct>")
-#define ANONYMOUS_UNION_NAME _("<anonymous union>")
-
/* Non-zero if we want to see trace of varobj level stuff. */
unsigned int varobjdebug = 0;
to symbols that do not exist anymore. */
int is_valid;
- /* Language info for this variable and its children. */
- struct language_specific *lang;
+ /* Language-related operations for this variable and its
+ children. */
+ const struct lang_varobj_ops *lang;
/* The varobj for this root node. */
struct varobj *rootvar;
static struct cleanup *make_cleanup_free_variable (struct varobj *var);
-static struct type *get_type (struct varobj *var);
-
-static struct type *get_value_type (struct varobj *var);
-
-static struct type *get_target_type (struct type *);
-
static enum varobj_display_formats variable_default_display (struct varobj *);
static void cppush (struct cpstack **pstack, char *name);
static char *my_value_of_variable (struct varobj *var,
enum varobj_display_formats format);
-static char *value_get_print_value (struct value *value,
- enum varobj_display_formats format,
- struct varobj *var);
-
-static int varobj_value_is_changeable_p (struct varobj *var);
-
static int is_root_p (struct varobj *var);
#if HAVE_PYTHON
#endif /* HAVE_PYTHON */
-static int default_value_is_changeable_p (struct varobj *var);
-
-/* C implementation */
-
-static int c_number_of_children (struct varobj *var);
-
-static char *c_name_of_variable (struct varobj *parent);
-
-static char *c_name_of_child (struct varobj *parent, int index);
-
-static char *c_path_expr_of_child (struct varobj *child);
-
-static struct value *c_value_of_child (struct varobj *parent, int index);
-
-static struct type *c_type_of_child (struct varobj *parent, int index);
-
-static char *c_value_of_variable (struct varobj *var,
- enum varobj_display_formats format);
-
-/* C++ implementation */
-
-static int cplus_number_of_children (struct varobj *var);
-
-static void cplus_class_num_children (struct type *type, int children[3]);
-
-static char *cplus_name_of_variable (struct varobj *parent);
-
-static char *cplus_name_of_child (struct varobj *parent, int index);
-
-static char *cplus_path_expr_of_child (struct varobj *child);
-
-static struct value *cplus_value_of_child (struct varobj *parent, int index);
-
-static struct type *cplus_type_of_child (struct varobj *parent, int index);
-
-static char *cplus_value_of_variable (struct varobj *var,
- enum varobj_display_formats format);
-
-/* Java implementation */
-
-static int java_number_of_children (struct varobj *var);
-
-static char *java_name_of_variable (struct varobj *parent);
-
-static char *java_name_of_child (struct varobj *parent, int index);
-
-static char *java_path_expr_of_child (struct varobj *child);
-
-static struct value *java_value_of_child (struct varobj *parent, int index);
-
-static struct type *java_type_of_child (struct varobj *parent, int index);
-
-static char *java_value_of_variable (struct varobj *var,
- enum varobj_display_formats format);
-
-/* Ada implementation */
-
-static int ada_number_of_children (struct varobj *var);
-
-static char *ada_name_of_variable (struct varobj *parent);
-
-static char *ada_name_of_child (struct varobj *parent, int index);
-
-static char *ada_path_expr_of_child (struct varobj *child);
-
-static struct value *ada_value_of_child (struct varobj *parent, int index);
-
-static struct type *ada_type_of_child (struct varobj *parent, int index);
-
-static char *ada_value_of_variable (struct varobj *var,
- enum varobj_display_formats format);
-
-static int ada_value_is_changeable_p (struct varobj *var);
-
-static int ada_value_has_mutated (struct varobj *var, struct value *new_val,
- struct type *new_type);
-
-/* The language specific vector */
-
-struct language_specific
-{
- /* The number of children of PARENT. */
- int (*number_of_children) (struct varobj * parent);
-
- /* The name (expression) of a root varobj. */
- char *(*name_of_variable) (struct varobj * parent);
-
- /* The name of the INDEX'th child of PARENT. */
- char *(*name_of_child) (struct varobj * parent, int index);
-
- /* Returns the rooted expression of CHILD, which is a variable
- obtain that has some parent. */
- char *(*path_expr_of_child) (struct varobj * child);
-
- /* The ``struct value *'' of the INDEX'th child of PARENT. */
- struct value *(*value_of_child) (struct varobj * parent, int index);
-
- /* The type of the INDEX'th child of PARENT. */
- struct type *(*type_of_child) (struct varobj * parent, int index);
-
- /* The current value of VAR. */
- char *(*value_of_variable) (struct varobj * var,
- enum varobj_display_formats format);
-
- /* Return non-zero if changes in value of VAR must be detected and
- reported by -var-update. Return zero if -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. */
- int (*value_is_changeable_p) (struct varobj *var);
-
- /* Return nonzero if the type of VAR has mutated.
-
- VAR's value is still the varobj's previous value, while NEW_VALUE
- is VAR's new value and NEW_TYPE is the var's new type. NEW_VALUE
- may be NULL indicating that there is no value available (the varobj
- may be out of scope, of may be the child of a null pointer, for
- instance). NEW_TYPE, on the other hand, must never be NULL.
-
- This function should also be able to assume that var's number of
- children is set (not < 0).
-
- Languages where types do not mutate can set this to NULL. */
- int (*value_has_mutated) (struct varobj *var, struct value *new_value,
- struct type *new_type);
-};
-
/* Array of known source language routines. */
-static struct language_specific languages[vlang_end] = {
- /* C */
- {
- c_number_of_children,
- c_name_of_variable,
- c_name_of_child,
- c_path_expr_of_child,
- c_value_of_child,
- c_type_of_child,
- c_value_of_variable,
- default_value_is_changeable_p,
- NULL /* value_has_mutated */}
- ,
- /* C++ */
- {
- cplus_number_of_children,
- cplus_name_of_variable,
- cplus_name_of_child,
- cplus_path_expr_of_child,
- cplus_value_of_child,
- cplus_type_of_child,
- cplus_value_of_variable,
- default_value_is_changeable_p,
- NULL /* value_has_mutated */}
- ,
- /* Java */
- {
- java_number_of_children,
- java_name_of_variable,
- java_name_of_child,
- java_path_expr_of_child,
- java_value_of_child,
- java_type_of_child,
- java_value_of_variable,
- default_value_is_changeable_p,
- NULL /* value_has_mutated */},
- /* Ada */
- {
- ada_number_of_children,
- ada_name_of_variable,
- ada_name_of_child,
- ada_path_expr_of_child,
- ada_value_of_child,
- ada_type_of_child,
- ada_value_of_variable,
- ada_value_is_changeable_p,
- ada_value_has_mutated}
-};
-
-/* A little convenience enum for dealing with C++/Java. */
-enum vsections
-{
- v_public = 0, v_private, v_protected
+static const struct lang_varobj_ops *languages[vlang_end] = {
+ &c_varobj_ops,
+ &cplus_varobj_ops,
+ &java_varobj_ops,
+ &ada_varobj_ops,
};
/* Private data */
/* Pointer to the varobj hash table (built at run time). */
static struct vlist **varobj_table;
-/* Is the variable X one of our "fake" children? */
-#define CPLUS_FAKE_CHILD(x) \
-((x) != NULL && (x)->type == NULL && (x)->value == NULL)
\f
/* API Implementation */
/* Set language info */
lang = variable_language (var);
- var->root->lang = &languages[lang];
+ var->root->lang = languages[lang];
install_new_value (var, value, 1 /* Initial assignment */);
&& var->value && !value_lazy (var->value))
{
xfree (var->print_value);
- var->print_value = value_get_print_value (var->value, var->format, var);
+ var->print_value = varobj_value_get_print_value (var->value,
+ var->format, var);
}
return var->format;
of FROM and TO -- if either is negative, the entire range is
used. */
-static void
-restrict_range (VEC (varobj_p) *children, int *from, int *to)
+void
+varobj_restrict_range (VEC (varobj_p) *children, int *from, int *to)
{
if (*from < 0 || *to < 0)
{
varobj twice is not something a sane frontend would do. */
update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL,
&children_changed, 0, 0, *to);
- restrict_range (var->children, from, to);
+ varobj_restrict_range (var->children, from, to);
return var->children;
}
}
}
- restrict_range (var->children, from, to);
+ varobj_restrict_range (var->children, from, to);
return var->children;
}
if (CPLUS_FAKE_CHILD (var))
return 0;
- type = get_value_type (var);
+ type = varobj_get_value_type (var);
/* Anonymous unions and structs are also not path_expr parents. */
return !((TYPE_CODE (type) == TYPE_CODE_STRUCT
/* Return the path expression parent for VAR. */
-static struct varobj *
-get_path_expr_parent (struct varobj *var)
+struct varobj *
+varobj_get_path_expr_parent (struct varobj *var)
{
struct varobj *parent = var;
should not be fetched. */
if (value != NULL && !value_lazy (value)
&& var->dynamic->pretty_printer == NULL)
- print_value = value_get_print_value (value, var->format, var);
+ print_value = varobj_value_get_print_value (value, var->format, var);
/* 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
if (var->dynamic->pretty_printer != NULL)
{
xfree (print_value);
- print_value = value_get_print_value (var->value, var->format, var);
+ print_value = varobj_value_get_print_value (var->value, var->format,
+ var);
if ((var->print_value == NULL && print_value != NULL)
|| (var->print_value != NULL && print_value == NULL)
|| (var->print_value != NULL && print_value != NULL
value_of_child (parent, index));
}
-/* Does CHILD represent a child with no name? This happens when
- the child is an anonmous struct or union and it has no field name
- in its parent variable.
-
- This has already been determined by *_describe_child. The easiest
- thing to do is to compare the child's name with ANONYMOUS_*_NAME. */
-
-static int
-is_anonymous_child (struct varobj *child)
-{
- return (strcmp (child->name, ANONYMOUS_STRUCT_NAME) == 0
- || strcmp (child->name, ANONYMOUS_UNION_NAME) == 0);
-}
-
static struct varobj *
create_child_with_value (struct varobj *parent, int index, char *name,
struct value *value)
child->parent = parent;
child->root = parent->root;
- if (is_anonymous_child (child))
+ if (varobj_is_anonymous_child (child))
childs_name = xstrprintf ("%s.%d_anonymous", parent->obj_name, index);
else
childs_name = xstrprintf ("%s.%s", parent->obj_name, name);
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;
-}
-
/* Return the type of the value that's stored in VAR,
or that would have being stored there if the
value were accessible.
the values and for comparing previous and new values.
For example, top-level references are always stripped. */
-static struct type *
-get_value_type (struct varobj *var)
+struct type *
+varobj_get_value_type (struct varobj *var)
{
struct 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
if (var->root->is_valid)
{
if (var->dynamic->pretty_printer != NULL)
- return value_get_print_value (var->value, var->format, var);
+ return varobj_value_get_print_value (var->value, var->format, var);
return (*var->root->lang->value_of_variable) (var, format);
}
else
return NULL;
}
-static char *
-value_get_print_value (struct value *value, enum varobj_display_formats format,
- struct varobj *var)
+void
+varobj_formatted_print_options (struct value_print_options *opts,
+ enum varobj_display_formats format)
+{
+ get_formatted_print_options (opts, format_code[(int) format]);
+ opts->deref_ref = 0;
+ opts->raw = 1;
+}
+
+char *
+varobj_value_get_print_value (struct value *value,
+ enum varobj_display_formats format,
+ struct varobj *var)
{
struct ui_file *stb;
struct cleanup *old_chain;
}
#endif
- get_formatted_print_options (&opts, format_code[(int) format]);
- opts.deref_ref = 0;
- opts.raw = 1;
+ varobj_formatted_print_options (&opts, format);
/* If the THEVALUE has contents, it is a regular string. */
if (thevalue)
if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value)))
return 0;
- type = get_value_type (var);
+ type = varobj_get_value_type (var);
switch (TYPE_CODE (type))
{
/* Call VAR's value_is_changeable_p language-specific callback. */
-static int
+int
varobj_value_is_changeable_p (struct varobj *var)
{
return var->root->lang->value_is_changeable_p (var);
return var->root->floating;
}
-/* Given the value and the type of a variable object,
- adjust the value and type to those necessary
- for getting children of the variable object.
- This includes dereferencing top-level references
- to all types and dereferencing pointers to
- structures.
-
- If LOOKUP_ACTUAL_TYPE is set the enclosing type of the
- value will be fetched and if it differs from static type
- the value will be casted to it.
-
- Both TYPE and *TYPE should be non-null. VALUE
- can be null if we want to only translate type.
- *VALUE can be null as well -- if the parent
- value is not known.
-
- If WAS_PTR is not NULL, set *WAS_PTR to 0 or 1
- depending on whether pointer was dereferenced
- in this function. */
-static void
-adjust_value_for_child_access (struct value **value,
- struct type **type,
- int *was_ptr,
- int lookup_actual_type)
-{
- gdb_assert (type && *type);
-
- if (was_ptr)
- *was_ptr = 0;
-
- *type = check_typedef (*type);
-
- /* The type of value stored in varobj, that is passed
- to us, is already supposed to be
- reference-stripped. */
-
- gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF);
-
- /* Pointers to structures are treated just like
- structures when accessing children. Don't
- dererences pointers to other types. */
- 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 && *value)
- {
- volatile struct gdb_exception except;
-
- TRY_CATCH (except, RETURN_MASK_ERROR)
- {
- *value = value_ind (*value);
- }
-
- if (except.reason < 0)
- *value = NULL;
- }
- *type = target_type;
- if (was_ptr)
- *was_ptr = 1;
- }
- }
-
- /* The 'get_target_type' function calls check_typedef on
- result, so we can immediately check type code. No
- need to call check_typedef here. */
-
- /* Access a real type of the value (if necessary and possible). */
- if (value && *value && lookup_actual_type)
- {
- struct type *enclosing_type;
- int real_type_found = 0;
-
- enclosing_type = value_actual_type (*value, 1, &real_type_found);
- if (real_type_found)
- {
- *type = enclosing_type;
- *value = value_cast (enclosing_type, *value);
- }
- }
-}
-
/* Implement the "value_is_changeable_p" varobj callback for most
languages. */
-static int
-default_value_is_changeable_p (struct varobj *var)
+int
+varobj_default_value_is_changeable_p (struct varobj *var)
{
int r;
struct type *type;
if (CPLUS_FAKE_CHILD (var))
return 0;
- type = get_value_type (var);
+ type = varobj_get_value_type (var);
switch (TYPE_CODE (type))
{
return r;
}
-/* C */
-
-static int
-c_number_of_children (struct varobj *var)
-{
- struct type *type = get_value_type (var);
- int children = 0;
- struct type *target;
-
- adjust_value_for_child_access (NULL, &type, NULL, 0);
- target = get_target_type (type);
-
- switch (TYPE_CODE (type))
- {
- case TYPE_CODE_ARRAY:
- if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0
- && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
- 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:
- /* The type here is a pointer to non-struct. Typically, pointers
- have one child, except for function ptrs, which have no children,
- and except for 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". */
- if (TYPE_CODE (target) == TYPE_CODE_FUNC
- || TYPE_CODE (target) == TYPE_CODE_VOID)
- children = 0;
- else
- children = 1;
- break;
-
- default:
- /* Other types have no children. */
- break;
- }
-
- return children;
-}
-
-static char *
-c_name_of_variable (struct varobj *parent)
-{
- return xstrdup (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 (field_is_static (&TYPE_FIELD (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,
- char **cfull_expression)
-{
- struct value *value = parent->value;
- struct type *type = get_value_type (parent);
- char *parent_expression = NULL;
- int was_ptr;
- volatile struct gdb_exception except;
-
- if (cname)
- *cname = NULL;
- if (cvalue)
- *cvalue = NULL;
- if (ctype)
- *ctype = NULL;
- if (cfull_expression)
- {
- *cfull_expression = NULL;
- parent_expression = varobj_get_path_expr (get_path_expr_parent (parent));
- }
- adjust_value_for_child_access (&value, &type, &was_ptr, 0);
-
- switch (TYPE_CODE (type))
- {
- case TYPE_CODE_ARRAY:
- if (cname)
- *cname
- = xstrdup (int_string (index
- + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)),
- 10, 1, 0, 0));
-
- if (cvalue && value)
- {
- int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type));
-
- TRY_CATCH (except, RETURN_MASK_ERROR)
- {
- *cvalue = value_subscript (value, real_index);
- }
- }
-
- if (ctype)
- *ctype = get_target_type (type);
-
- if (cfull_expression)
- *cfull_expression =
- xstrprintf ("(%s)[%s]", parent_expression,
- int_string (index
- + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)),
- 10, 1, 0, 0));
-
-
- break;
-
- case TYPE_CODE_STRUCT:
- case TYPE_CODE_UNION:
- {
- const char *field_name;
-
- /* If the type is anonymous and the field has no name,
- set an appropriate name. */
- field_name = TYPE_FIELD_NAME (type, index);
- if (field_name == NULL || *field_name == '\0')
- {
- if (cname)
- {
- if (TYPE_CODE (TYPE_FIELD_TYPE (type, index))
- == TYPE_CODE_STRUCT)
- *cname = xstrdup (ANONYMOUS_STRUCT_NAME);
- else
- *cname = xstrdup (ANONYMOUS_UNION_NAME);
- }
-
- if (cfull_expression)
- *cfull_expression = xstrdup ("");
- }
- else
- {
- if (cname)
- *cname = xstrdup (field_name);
-
- if (cfull_expression)
- {
- char *join = was_ptr ? "->" : ".";
-
- *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression,
- join, field_name);
- }
- }
-
- 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)
- {
- TRY_CATCH (except, RETURN_MASK_ERROR)
- {
- *cvalue = value_ind (value);
- }
-
- if (except.reason < 0)
- *cvalue = NULL;
- }
-
- /* Don't use get_target_type because it calls
- check_typedef and here, we want to show the true
- declared type of the variable. */
- if (ctype)
- *ctype = TYPE_TARGET_TYPE (type);
-
- if (cfull_expression)
- *cfull_expression = xstrprintf ("*(%s)", parent_expression);
-
- break;
-
- default:
- /* This should not happen. */
- if (cname)
- *cname = xstrdup ("???");
- if (cfull_expression)
- *cfull_expression = 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, NULL);
- return name;
-}
-
-static char *
-c_path_expr_of_child (struct varobj *child)
-{
- c_describe_child (child->parent, child->index, NULL, NULL, NULL,
- &child->path_expr);
- return child->path_expr;
-}
-
-static struct value *
-c_value_of_child (struct varobj *parent, int index)
-{
- struct value *value = NULL;
-
- c_describe_child (parent, index, NULL, &value, NULL, NULL);
- 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, NULL);
- return type;
-}
-
-static char *
-c_value_of_variable (struct varobj *var, enum varobj_display_formats format)
-{
- /* 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
- {
- if (var->not_fetched && value_lazy (var->value))
- /* Frozen variable and no value yet. We don't
- implicitly fetch the value. MI response will
- use empty string for the value, which is OK. */
- return NULL;
-
- gdb_assert (varobj_value_is_changeable_p (var));
- gdb_assert (!value_lazy (var->value));
-
- /* If the specified format is the current one,
- we can reuse print_value. */
- if (format == var->format)
- return xstrdup (var->print_value);
- else
- return value_get_print_value (var->value, format, var);
- }
- }
- }
-}
-\f
-
-/* C++ */
-
-static int
-cplus_number_of_children (struct varobj *var)
-{
- struct value *value = NULL;
- struct type *type;
- int children, dont_know;
- int lookup_actual_type = 0;
- struct value_print_options opts;
-
- dont_know = 1;
- children = 0;
-
- get_user_print_options (&opts);
-
- if (!CPLUS_FAKE_CHILD (var))
- {
- type = get_value_type (var);
-
- /* It is necessary to access a real type (via RTTI). */
- if (opts.objectprint)
- {
- value = var->value;
- lookup_actual_type = (TYPE_CODE (var->type) == TYPE_CODE_REF
- || TYPE_CODE (var->type) == TYPE_CODE_PTR);
- }
- adjust_value_for_child_access (&value, &type, NULL, lookup_actual_type);
-
- 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_value_type (var->parent);
-
- /* It is necessary to access a real type (via RTTI). */
- if (opts.objectprint)
- {
- struct varobj *parent = var->parent;
-
- value = parent->value;
- lookup_actual_type = (TYPE_CODE (parent->type) == TYPE_CODE_REF
- || TYPE_CODE (parent->type) == TYPE_CODE_PTR);
- }
- adjust_value_for_child_access (&value, &type, NULL, lookup_actual_type);
-
- 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, vptr_fieldno;
- struct type *basetype = NULL;
-
- children[v_public] = 0;
- children[v_private] = 0;
- children[v_protected] = 0;
-
- vptr_fieldno = get_vptr_fieldno (type, &basetype);
- for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++)
- {
- /* If we have a virtual table pointer, omit it. Even if virtual
- table pointers are not specifically marked in the debug info,
- they should be artificial. */
- if ((type == basetype && i == vptr_fieldno)
- || TYPE_FIELD_ARTIFICIAL (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);
-}
-
-enum accessibility { private_field, protected_field, public_field };
-
-/* Check if field INDEX of TYPE has the specified accessibility.
- Return 0 if so and 1 otherwise. */
-static int
-match_accessibility (struct type *type, int index, enum accessibility acc)
-{
- if (acc == private_field && TYPE_FIELD_PRIVATE (type, index))
- return 1;
- else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index))
- return 1;
- else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index)
- && !TYPE_FIELD_PROTECTED (type, index))
- return 1;
- else
- return 0;
-}
-
-static void
-cplus_describe_child (struct varobj *parent, int index,
- char **cname, struct value **cvalue, struct type **ctype,
- char **cfull_expression)
-{
- struct value *value;
- struct type *type;
- int was_ptr;
- int lookup_actual_type = 0;
- char *parent_expression = NULL;
- struct varobj *var;
- struct value_print_options opts;
-
- if (cname)
- *cname = NULL;
- if (cvalue)
- *cvalue = NULL;
- if (ctype)
- *ctype = NULL;
- if (cfull_expression)
- *cfull_expression = NULL;
-
- get_user_print_options (&opts);
-
- var = (CPLUS_FAKE_CHILD (parent)) ? parent->parent : parent;
- if (opts.objectprint)
- lookup_actual_type = (TYPE_CODE (var->type) == TYPE_CODE_REF
- || TYPE_CODE (var->type) == TYPE_CODE_PTR);
- value = var->value;
- type = get_value_type (var);
- if (cfull_expression)
- parent_expression = varobj_get_path_expr (get_path_expr_parent (var));
-
- adjust_value_for_child_access (&value, &type, &was_ptr, lookup_actual_type);
-
- if (TYPE_CODE (type) == TYPE_CODE_STRUCT
- || TYPE_CODE (type) == TYPE_CODE_UNION)
- {
- char *join = was_ptr ? "->" : ".";
-
- 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);
- enum accessibility acc = public_field;
- int vptr_fieldno;
- struct type *basetype = NULL;
- const char *field_name;
-
- vptr_fieldno = get_vptr_fieldno (type, &basetype);
- if (strcmp (parent->name, "private") == 0)
- acc = private_field;
- else if (strcmp (parent->name, "protected") == 0)
- acc = protected_field;
-
- while (index >= 0)
- {
- if ((type == basetype && type_index == vptr_fieldno)
- || TYPE_FIELD_ARTIFICIAL (type, type_index))
- ; /* ignore vptr */
- else if (match_accessibility (type, type_index, acc))
- --index;
- ++type_index;
- }
- --type_index;
-
- /* If the type is anonymous and the field has no name,
- set an appopriate name. */
- field_name = TYPE_FIELD_NAME (type, type_index);
- if (field_name == NULL || *field_name == '\0')
- {
- if (cname)
- {
- if (TYPE_CODE (TYPE_FIELD_TYPE (type, type_index))
- == TYPE_CODE_STRUCT)
- *cname = xstrdup (ANONYMOUS_STRUCT_NAME);
- else if (TYPE_CODE (TYPE_FIELD_TYPE (type, type_index))
- == TYPE_CODE_UNION)
- *cname = xstrdup (ANONYMOUS_UNION_NAME);
- }
-
- if (cfull_expression)
- *cfull_expression = xstrdup ("");
- }
- else
- {
- if (cname)
- *cname = xstrdup (TYPE_FIELD_NAME (type, type_index));
-
- if (cfull_expression)
- *cfull_expression
- = xstrprintf ("((%s)%s%s)", parent_expression, join,
- field_name);
- }
-
- if (cvalue && value)
- *cvalue = value_struct_element_index (value, type_index);
-
- if (ctype)
- *ctype = TYPE_FIELD_TYPE (type, type_index);
- }
- else if (index < TYPE_N_BASECLASSES (type))
- {
- /* This is a baseclass. */
- if (cname)
- *cname = xstrdup (TYPE_FIELD_NAME (type, index));
-
- if (cvalue && value)
- *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value);
-
- if (ctype)
- {
- *ctype = TYPE_FIELD_TYPE (type, index);
- }
-
- if (cfull_expression)
- {
- char *ptr = was_ptr ? "*" : "";
-
- /* Cast the parent to the base' type. Note that in gdb,
- expression like
- (Base1)d
- will create an lvalue, for all appearences, so we don't
- need to use more fancy:
- *(Base1*)(&d)
- construct.
-
- When we are in the scope of the base class or of one
- of its children, the type field name will be interpreted
- as a constructor, if it exists. Therefore, we must
- indicate that the name is a class name by using the
- 'class' keyword. See PR mi/11912 */
- *cfull_expression = xstrprintf ("(%s(class %s%s) %s)",
- ptr,
- TYPE_FIELD_NAME (type, index),
- ptr,
- parent_expression);
- }
- }
- else
- {
- char *access = NULL;
- 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)
- access = "public";
- else if (children[v_private] > 0)
- access = "private";
- else
- access = "protected";
- break;
- case 1:
- if (children[v_public] > 0)
- {
- if (children[v_private] > 0)
- access = "private";
- else
- access = "protected";
- }
- else if (children[v_private] > 0)
- access = "protected";
- break;
- case 2:
- /* Must be protected. */
- access = "protected";
- break;
- default:
- /* error! */
- break;
- }
-
- gdb_assert (access);
- if (cname)
- *cname = xstrdup (access);
-
- /* Value and type and full expression are null here. */
- }
- }
- else
- {
- c_describe_child (parent, index, cname, cvalue, ctype, cfull_expression);
- }
-}
-
-static char *
-cplus_name_of_child (struct varobj *parent, int index)
-{
- char *name = NULL;
-
- cplus_describe_child (parent, index, &name, NULL, NULL, NULL);
- return name;
-}
-
-static char *
-cplus_path_expr_of_child (struct varobj *child)
-{
- cplus_describe_child (child->parent, child->index, NULL, NULL, NULL,
- &child->path_expr);
- return child->path_expr;
-}
-
-static struct value *
-cplus_value_of_child (struct varobj *parent, int index)
-{
- struct value *value = NULL;
-
- cplus_describe_child (parent, index, NULL, &value, NULL, NULL);
- return value;
-}
-
-static struct type *
-cplus_type_of_child (struct varobj *parent, int index)
-{
- struct type *type = NULL;
-
- cplus_describe_child (parent, index, NULL, NULL, &type, NULL);
- return type;
-}
-
-static char *
-cplus_value_of_variable (struct varobj *var,
- enum varobj_display_formats format)
-{
-
- /* 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, format);
-}
-\f
-/* 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 char *
-java_path_expr_of_child (struct varobj *child)
-{
- return NULL;
-}
-
-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 char *
-java_value_of_variable (struct varobj *var, enum varobj_display_formats format)
-{
- return cplus_value_of_variable (var, format);
-}
-
-/* Ada specific callbacks for VAROBJs. */
-
-static int
-ada_number_of_children (struct varobj *var)
-{
- return ada_varobj_get_number_of_children (var->value, var->type);
-}
-
-static char *
-ada_name_of_variable (struct varobj *parent)
-{
- return c_name_of_variable (parent);
-}
-
-static char *
-ada_name_of_child (struct varobj *parent, int index)
-{
- return ada_varobj_get_name_of_child (parent->value, parent->type,
- parent->name, index);
-}
-
-static char*
-ada_path_expr_of_child (struct varobj *child)
-{
- struct varobj *parent = child->parent;
- const char *parent_path_expr = varobj_get_path_expr (parent);
-
- return ada_varobj_get_path_expr_of_child (parent->value,
- parent->type,
- parent->name,
- parent_path_expr,
- child->index);
-}
-
-static struct value *
-ada_value_of_child (struct varobj *parent, int index)
-{
- return ada_varobj_get_value_of_child (parent->value, parent->type,
- parent->name, index);
-}
-
-static struct type *
-ada_type_of_child (struct varobj *parent, int index)
-{
- return ada_varobj_get_type_of_child (parent->value, parent->type,
- index);
-}
-
-static char *
-ada_value_of_variable (struct varobj *var, enum varobj_display_formats format)
-{
- struct value_print_options opts;
-
- get_formatted_print_options (&opts, format_code[(int) format]);
- opts.deref_ref = 0;
- opts.raw = 1;
-
- return ada_varobj_get_value_of_variable (var->value, var->type, &opts);
-}
-
-/* Implement the "value_is_changeable_p" routine for Ada. */
-
-static int
-ada_value_is_changeable_p (struct varobj *var)
-{
- struct type *type = var->value ? value_type (var->value) : var->type;
-
- if (ada_is_array_descriptor_type (type)
- && TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
- {
- /* This is in reality a pointer to an unconstrained array.
- its value is changeable. */
- return 1;
- }
-
- if (ada_is_string_type (type))
- {
- /* We display the contents of the string in the array's
- "value" field. The contents can change, so consider
- that the array is changeable. */
- return 1;
- }
-
- return default_value_is_changeable_p (var);
-}
-
-/* Implement the "value_has_mutated" routine for Ada. */
-
-static int
-ada_value_has_mutated (struct varobj *var, struct value *new_val,
- struct type *new_type)
-{
- int i;
- int from = -1;
- int to = -1;
-
- /* If the number of fields have changed, then for sure the type
- has mutated. */
- if (ada_varobj_get_number_of_children (new_val, new_type)
- != var->num_children)
- return 1;
-
- /* If the number of fields have remained the same, then we need
- to check the name of each field. If they remain the same,
- then chances are the type hasn't mutated. This is technically
- an incomplete test, as the child's type might have changed
- despite the fact that the name remains the same. But we'll
- handle this situation by saying that the child has mutated,
- not this value.
-
- If only part (or none!) of the children have been fetched,
- then only check the ones we fetched. It does not matter
- to the frontend whether a child that it has not fetched yet
- has mutated or not. So just assume it hasn't. */
-
- restrict_range (var->children, &from, &to);
- for (i = from; i < to; i++)
- if (strcmp (ada_varobj_get_name_of_child (new_val, new_type,
- var->name, i),
- VEC_index (varobj_p, var->children, i)->name) != 0)
- return 1;
-
- return 0;
-}
-
/* Iterate all the existing _root_ VAROBJs and call the FUNC callback for them
with an arbitrary caller supplied DATA pointer. */
projects / binutils-gdb.git / commitdiff