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vla: introduce new bound type abstraction adapt uses

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The rational behind this patch is to get started to implement the feature
described in dwarf4 standard (2.19) Static and Dynamic Values of Attributes.
It adds new BOUND_PROP to store either a constant, exprloc, or reference to
describe an upper-/lower bound of a subrange. Other than that no new features
are introduced.

	* dwarf2read.c (read_subrange_type): Use struct bound_prop for
	declaring high/low bounds and change uses accordingly. Call
	create_range_type instead of create_static_range_type.
	* gdbtypes.c (create_range_type): New function.
	(create_range_type): Convert bounds into struct bound_prop and pass
	them to create_range_type.
	* gdbtypes.h (struct bound_prop): New struct.
	(create_range_type): New function prototype.
	(struct range_bounds): Use struct bound_prop instead of LONGEST for
	high/low bounds. Remove low_undefined/high_undefined and adapt all uses.
	(TYPE_LOW_BOUND,TYPE_HIGH_BOUND): Adapt macros to refer to the static
	part of the bound.
	* parse.c (follow_types): Set high bound kind to BOUND_UNDEFINED.
This commit is contained in:
Sanimir Agovic 2013-10-08 15:04:49 +01:00
parent 0c9c347402
commit 729efb1317
5 changed files with 123 additions and 47 deletions
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50
gdb/gdbtypes.c
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@ -798,6 +798,34 @@ allocate_stub_method (struct type *type)
return mtype;
}
/* Create a range type with a dynamic range from LOW_BOUND to
HIGH_BOUND, inclusive. See create_range_type for further details. */
struct type *
create_range_type (struct type *result_type, struct type *index_type,
const struct dynamic_prop *low_bound,
const struct dynamic_prop *high_bound)
{
if (result_type == NULL)
result_type = alloc_type_copy (index_type);
TYPE_CODE (result_type) = TYPE_CODE_RANGE;
TYPE_TARGET_TYPE (result_type) = index_type;
if (TYPE_STUB (index_type))
TYPE_TARGET_STUB (result_type) = 1;
else
TYPE_LENGTH (result_type) = TYPE_LENGTH (check_typedef (index_type));
TYPE_RANGE_DATA (result_type) = (struct range_bounds *)
TYPE_ZALLOC (result_type, sizeof (struct range_bounds));
TYPE_RANGE_DATA (result_type)->low = *low_bound;
TYPE_RANGE_DATA (result_type)->high = *high_bound;
if (low_bound->kind == PROP_CONST && low_bound->data.const_val >= 0)
TYPE_UNSIGNED (result_type) = 1;
return result_type;
}
/* Create a range type using either a blank type supplied in
RESULT_TYPE, or creating a new type, inheriting the objfile from
INDEX_TYPE.
@ -812,21 +840,15 @@ struct type *
create_static_range_type (struct type *result_type, struct type *index_type,
LONGEST low_bound, LONGEST high_bound)
{
if (result_type == NULL)
result_type = alloc_type_copy (index_type);
TYPE_CODE (result_type) = TYPE_CODE_RANGE;
TYPE_TARGET_TYPE (result_type) = index_type;
if (TYPE_STUB (index_type))
TYPE_TARGET_STUB (result_type) = 1;
else
TYPE_LENGTH (result_type) = TYPE_LENGTH (check_typedef (index_type));
TYPE_RANGE_DATA (result_type) = (struct range_bounds *)
TYPE_ZALLOC (result_type, sizeof (struct range_bounds));
TYPE_LOW_BOUND (result_type) = low_bound;
TYPE_HIGH_BOUND (result_type) = high_bound;
struct dynamic_prop low, high;
if (low_bound >= 0)
TYPE_UNSIGNED (result_type) = 1;
low.kind = PROP_CONST;
low.data.const_val = low_bound;
high.kind = PROP_CONST;
high.data.const_val = high_bound;
result_type = create_range_type (result_type, index_type, &low, &high);
return result_type;
}