/* varobj support for Ada.
- Copyright (C) 2012-2013 Free Software Foundation, Inc.
+ Copyright (C) 2012-2015 Free Software Foundation, Inc.
This file is part of GDB.
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "ada-varobj.h"
#include "ada-lang.h"
+#include "varobj.h"
#include "language.h"
#include "valprint.h"
it allows the code to use the type without having to worry about
it being set or not. It makes the code clearer. */
+static int ada_varobj_get_number_of_children (struct value *parent_value,
+ struct type *parent_type);
+
/* A convenience function that decodes the VALUE_PTR/TYPE_PTR couple:
If there is a value (*VALUE_PTR not NULL), then perform the decoding
using it, and compute the associated type from the resulting value.
&& !ada_is_array_descriptor_type (TYPE_TARGET_TYPE (*type))
&& !ada_is_constrained_packed_array_type (TYPE_TARGET_TYPE (*type)))
ada_varobj_ind (*value, *type, value, type);
+
+ /* If this is a tagged type, we need to transform it a bit in order
+ to be able to fetch its full view. As always with tagged types,
+ we can only do that if we have a value. */
+ if (*value != NULL && ada_is_tagged_type (*type, 1))
+ {
+ *value = ada_tag_value_at_base_address (*value);
+ *type = value_type (*value);
+ }
}
/* Assuming that the (PARENT_VALUE, PARENT_TYPE) pair is an array
{
LONGEST lo, hi;
+ if (parent_value == NULL
+ && is_dynamic_type (TYPE_INDEX_TYPE (parent_type)))
+ {
+ /* This happens when listing the children of an object
+ which does not exist in memory (Eg: when requesting
+ the children of a null pointer, which is allowed by
+ varobj). The array index type being dynamic, we cannot
+ determine how many elements this array has. Just assume
+ it has none. */
+ return 0;
+ }
+
if (!get_array_bounds (parent_type, &lo, &hi))
{
/* Could not get the array bounds. Pretend this is an empty array. */
/* Return the number of children for the (PARENT_VALUE, PARENT_TYPE)
pair. */
-int
+static int
ada_varobj_get_number_of_children (struct value *parent_value,
struct type *parent_type)
{
struct type **child_type,
char **child_path_expr)
{
- struct type *index_desc_type;
struct type *index_type;
int real_index;
gdb_assert (TYPE_CODE (parent_type) == TYPE_CODE_ARRAY);
- index_desc_type = ada_find_parallel_type (parent_type, "___XA");
- ada_fixup_array_indexes_type (index_desc_type);
- if (index_desc_type)
- index_type = TYPE_FIELD_TYPE (index_desc_type, 0);
- else
- index_type = TYPE_INDEX_TYPE (parent_type);
+ index_type = TYPE_INDEX_TYPE (parent_type);
real_index = child_index + ada_discrete_type_low_bound (index_type);
if (child_name)
The result should be deallocated after use with xfree. */
-char *
+static char *
ada_varobj_get_name_of_child (struct value *parent_value,
struct type *parent_type,
const char *parent_name, int child_index)
The result must be deallocated after use with xfree. */
-char *
+static char *
ada_varobj_get_path_expr_of_child (struct value *parent_value,
struct type *parent_type,
const char *parent_name,
/* Return the value of child number CHILD_INDEX of the (PARENT_VALUE,
PARENT_TYPE) pair. PARENT_NAME is the name of the parent. */
-struct value *
+static struct value *
ada_varobj_get_value_of_child (struct value *parent_value,
struct type *parent_type,
const char *parent_name, int child_index)
/* Return the type of child number CHILD_INDEX of the (PARENT_VALUE,
PARENT_TYPE) pair. */
-struct type *
+static struct type *
ada_varobj_get_type_of_child (struct value *parent_value,
struct type *parent_type,
int child_index)
/* Return a string representation of the (VALUE, TYPE) pair, using
the given print options OPTS as our formatting options. */
-char *
+static char *
ada_varobj_get_value_of_variable (struct value *value,
struct type *type,
struct value_print_options *opts)
return result;
}
+/* Ada specific callbacks for VAROBJs. */
+
+static int
+ada_number_of_children (const struct varobj *var)
+{
+ return ada_varobj_get_number_of_children (var->value, var->type);
+}
+static char *
+ada_name_of_variable (const struct varobj *parent)
+{
+ return c_varobj_ops.name_of_variable (parent);
+}
+
+static char *
+ada_name_of_child (const 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 (const struct varobj *child)
+{
+ const 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 (const 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 (const struct varobj *parent, int index)
+{
+ return ada_varobj_get_type_of_child (parent->value, parent->type,
+ index);
+}
+
+static char *
+ada_value_of_variable (const struct varobj *var,
+ enum varobj_display_formats format)
+{
+ struct value_print_options opts;
+
+ varobj_formatted_print_options (&opts, format);
+
+ 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 (const 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 varobj_default_value_is_changeable_p (var);
+}
+
+/* Implement the "value_has_mutated" routine for Ada. */
+
+static int
+ada_value_has_mutated (const 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. */
+
+ varobj_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;
+}
+
+/* varobj operations for ada. */
+
+const struct lang_varobj_ops ada_varobj_ops =
+{
+ 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,
+ varobj_default_is_path_expr_parent
+};
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