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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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58
gdb/gdbtypes.h
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@ -399,6 +399,33 @@ enum type_instance_flag_value
#define TYPE_ADDRESS_CLASS_ALL(t) (TYPE_INSTANCE_FLAGS(t) \
& TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
/* * Used to store a dynamic property. */
struct dynamic_prop
{
/* Determine which field of the union dynamic_prop.data is used. */
enum
{
PROP_UNDEFINED, /* Not defined. */
PROP_CONST, /* Constant. */
PROP_LOCEXPR, /* Location expression. */
PROP_LOCLIST /* Location list. */
} kind;
/* Storage for dynamic or static value. */
union data
{
/* Storage for constant property. */
LONGEST const_val;
/* Storage for dynamic property. */
void *baton;
} data;
};
/* * Determine which field of the union main_type.fields[x].loc is
used. */
@ -630,19 +657,11 @@ struct main_type
{
/* * Low bound of range. */
LONGEST low;
struct dynamic_prop low;
/* * High bound of range. */
LONGEST high;
/* * Flags indicating whether the values of low and high are
valid. When true, the respective range value is
undefined. Currently used only for FORTRAN arrays. */
char low_undefined;
char high_undefined;
struct dynamic_prop high;
} *bounds;
} flds_bnds;
@ -1155,12 +1174,18 @@ extern void allocate_gnat_aux_type (struct type *);
#define TYPE_INDEX_TYPE(type) TYPE_FIELD_TYPE (type, 0)
#define TYPE_RANGE_DATA(thistype) TYPE_MAIN_TYPE(thistype)->flds_bnds.bounds
#define TYPE_LOW_BOUND(range_type) TYPE_RANGE_DATA(range_type)->low
#define TYPE_HIGH_BOUND(range_type) TYPE_RANGE_DATA(range_type)->high
#define TYPE_LOW_BOUND(range_type) \
TYPE_RANGE_DATA(range_type)->low.data.const_val
#define TYPE_HIGH_BOUND(range_type) \
TYPE_RANGE_DATA(range_type)->high.data.const_val
#define TYPE_LOW_BOUND_UNDEFINED(range_type) \
TYPE_RANGE_DATA(range_type)->low_undefined
(TYPE_RANGE_DATA(range_type)->low.kind == PROP_UNDEFINED)
#define TYPE_HIGH_BOUND_UNDEFINED(range_type) \
TYPE_RANGE_DATA(range_type)->high_undefined
(TYPE_RANGE_DATA(range_type)->high.kind == PROP_UNDEFINED)
#define TYPE_HIGH_BOUND_KIND(range_type) \
TYPE_RANGE_DATA(range_type)->high.kind
#define TYPE_LOW_BOUND_KIND(range_type) \
TYPE_RANGE_DATA(range_type)->low.kind
/* Moto-specific stuff for FORTRAN arrays. */
@ -1628,9 +1653,14 @@ extern struct type *lookup_function_type_with_arguments (struct type *,
extern struct type *create_static_range_type (struct type *, struct type *,
LONGEST, LONGEST);
extern struct type *create_array_type_with_stride
(struct type *, struct type *, struct type *, unsigned int);
extern struct type *create_range_type (struct type *, struct type *,
const struct dynamic_prop *,
const struct dynamic_prop *);
extern struct type *create_array_type (struct type *, struct type *,
struct type *);