[PATCH 11/23] vla: add stride support to fortran arrays.

Keven Boell
2014-06-04T05:54:45Z

2014-05-28 Sanimir Agovic <sanimir.agovic@intel.com>
Keven Boell <keven.boell@intel.com>

* dwarf2read.c (read_subrange_type): Read dynamic
stride attributes.
* gdbtypes.c (create_array_type_with_stride): Add
stride support
(create_range_type): Add stride parameter.
(create_static_range_type): Pass default stride
parameter.
(resolve_dynamic_range): Evaluate stride baton.
(resolve_dynamic_type): Adjust data location with
the value of byte stride.
* gdbtypes.h (TYPE_BYTE_STRIDE): New macro.
(TYPE_BYTE_STRIDE_BLOCK): New macro.
(TYPE_BYTE_STRIDE_LOCLIST): New macro.
(TYPE_BYTE_STRIDE_KIND): New macro.
* valarith.c (value_subscripted_rvalue): Use stride.

Change-Id: I3d810c0dc37f9d9fd84dba4c764cdefc52d8501e

Signed-off-by: Keven Boell <keven.boell@intel.com>
---
gdb/dwarf2read.c | 13 +++++++++++--
gdb/gdbtypes.c | 40 ++++++++++++++++++++++++++++++++++------
gdb/gdbtypes.h | 17 +++++++++++++++++
gdb/valarith.c | 14 +++++++++++++-
4 files changed, 75 insertions(+), 9 deletions(-)

diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index 0b23701..a71aaa7 100644
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -14553,7 +14553,7 @@ read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
struct type *base_type, *orig_base_type;
struct type *range_type;
struct attribute *attr;
- struct dynamic_prop low, high;
+ struct dynamic_prop low, high, stride;
int low_default_is_valid;
int high_bound_is_count = 0;
const char *name;
@@ -14573,7 +14573,9 @@ read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)

low.kind = PROP_CONST;
high.kind = PROP_CONST;
+ stride.kind = PROP_CONST;
high.data.const_val = 0;
+ stride.data.const_val = 0;

/* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
omitting DW_AT_lower_bound. */
@@ -14606,6 +14608,13 @@ read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
break;
}

+ attr = dwarf2_attr (die, DW_AT_byte_stride, cu);
+ if (attr)
+ if (!attr_to_dynamic_prop (attr, die, cu, &stride, NULL, 0))
+ complaint (&symfile_complaints, _("Missing DW_AT_byte_stride "
+ "- DIE at 0x%x [in module %s]"),
+ die->offset.sect_off, objfile_name (cu->objfile));
+
attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
if (attr)
attr_to_dynamic_prop (attr, die, cu, &low, NULL, 0);
@@ -14682,7 +14691,7 @@ read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
&& !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask))
high.data.const_val |= negative_mask;

- range_type = create_range_type (NULL, orig_base_type, &low, &high);
+ range_type = create_range_type (NULL, orig_base_type, &low, &high, &stride);

if (high_bound_is_count)
TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1;
diff --git a/gdb/gdbtypes.c b/gdb/gdbtypes.c
index 5aa6582..fa49d75 100644
--- a/gdb/gdbtypes.c
+++ b/gdb/gdbtypes.c
@@ -805,7 +805,8 @@ allocate_stub_method (struct type *type)
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)
+ const struct dynamic_prop *high_bound,
+ const struct dynamic_prop *stride)
{
if (result_type == NULL)
result_type = alloc_type_copy (index_type);
@@ -820,6 +821,7 @@ create_range_type (struct type *result_type, struct type *index_type,
TYPE_ZALLOC (result_type, sizeof (struct range_bounds));
TYPE_RANGE_DATA (result_type)->low = *low_bound;
TYPE_RANGE_DATA (result_type)->high = *high_bound;
+ TYPE_RANGE_DATA (result_type)->stride = *stride;

if (low_bound->kind == PROP_CONST && low_bound->data.const_val >= 0)
TYPE_UNSIGNED (result_type) = 1;
@@ -841,7 +843,7 @@ struct type *
create_static_range_type (struct type *result_type, struct type *index_type,
LONGEST low_bound, LONGEST high_bound)
{
- struct dynamic_prop low, high;
+ struct dynamic_prop low, high, stride;

low.kind = PROP_CONST;
low.data.const_val = low_bound;
@@ -849,7 +851,11 @@ create_static_range_type (struct type *result_type, struct type *index_type,
high.kind = PROP_CONST;
high.data.const_val = high_bound;

- result_type = create_range_type (result_type, index_type, &low, &high);
+ stride.kind = PROP_CONST;
+ stride.data.const_val = 0;
+
+ result_type = create_range_type (result_type, index_type,
+ &low, &high, &stride);

return result_type;
}
@@ -1006,16 +1012,21 @@ create_array_type_with_stride (struct type *result_type,
if (has_static_range (TYPE_RANGE_DATA (range_type))
&& dwarf2_address_data_valid (result_type))
{
- LONGEST low_bound, high_bound;
+ LONGEST low_bound, high_bound, byte_stride;

if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0)
low_bound = high_bound = 0;
CHECK_TYPEDEF (element_type);
+
+ byte_stride = abs (TYPE_BYTE_STRIDE (range_type));
+
/* Be careful when setting the array length. Ada arrays can be
empty arrays with the high_bound being smaller than the low_bound.
In such cases, the array length should be zero. */
if (high_bound < low_bound)
TYPE_LENGTH (result_type) = 0;
+ else if (byte_stride > 0)
+ TYPE_LENGTH (result_type) = byte_stride * (high_bound - low_bound + 1);
else if (bit_stride > 0)
TYPE_LENGTH (result_type) =
(bit_stride * (high_bound - low_bound + 1) + 7) / 8;
@@ -1685,7 +1696,7 @@ resolve_dynamic_range (struct type *dyn_range_type, CORE_ADDR addr)
struct type *static_range_type;
const struct dynamic_prop *prop;
const struct dwarf2_locexpr_baton *baton;
- struct dynamic_prop low_bound, high_bound;
+ struct dynamic_prop low_bound, high_bound, stride;
struct type *range_copy = copy_type (dyn_range_type);

gdb_assert (TYPE_CODE (dyn_range_type) == TYPE_CODE_RANGE);
@@ -1717,10 +1728,17 @@ resolve_dynamic_range (struct type *dyn_range_type, CORE_ADDR addr)
high_bound.kind = PROP_UNDEFINED;
high_bound.data.const_val = 0;
}
+
+ prop = &TYPE_RANGE_DATA (dyn_range_type)->stride;
+ if (dwarf2_evaluate_property (prop, addr, &value))
+ {
+ stride.kind = PROP_CONST;
+ stride.data.const_val = value;
+ }

static_range_type = create_range_type (range_copy,
TYPE_TARGET_TYPE (range_copy),
- &low_bound, &high_bound);
+ &low_bound, &high_bound, &stride);
TYPE_RANGE_DATA (static_range_type)->flag_bound_evaluated = 1;
return static_range_type;
}
@@ -1885,7 +1903,17 @@ resolve_dynamic_type (struct type *type, CORE_ADDR addr)
prop = TYPE_DATA_LOCATION (type);
if (dwarf2_evaluate_property (prop, addr, &value))
{
+ struct type *range_type = TYPE_INDEX_TYPE (type);
+
+ /* Adjust the data location with the value of byte stride if set, which
+ can describe the separation between successive elements along the
+ dimension. */
+ if (TYPE_BYTE_STRIDE (range_type) < 0)
+ value += (TYPE_HIGH_BOUND (range_type) - TYPE_LOW_BOUND (range_type))
+ * TYPE_BYTE_STRIDE (range_type);
+
adjusted_address = value;
+
TYPE_DATA_LOCATION_ADDR (type) = value;
TYPE_DATA_LOCATION_KIND (type) = PROP_CONST;
}
diff --git a/gdb/gdbtypes.h b/gdb/gdbtypes.h
index 52e6233..ead800a 100644
--- a/gdb/gdbtypes.h
+++ b/gdb/gdbtypes.h
@@ -667,6 +667,10 @@ struct main_type

struct dynamic_prop high;

+ /* * Stride of range. */
+
+ struct dynamic_prop stride;
+
/* True if HIGH range bound contains the number of elements in the
subrange. This affects how the final hight bound is computed. */

@@ -1216,6 +1220,15 @@ extern void allocate_gnat_aux_type (struct type *);
TYPE_RANGE_DATA(range_type)->high.kind
#define TYPE_LOW_BOUND_KIND(range_type) \
TYPE_RANGE_DATA(range_type)->low.kind
+#define TYPE_BYTE_STRIDE(range_type) \
+ TYPE_RANGE_DATA(range_type)->stride.data.const_val
+#define TYPE_BYTE_STRIDE_BLOCK(range_type) \
+ TYPE_RANGE_DATA(range_type)->stride.data.locexpr
+#define TYPE_BYTE_STRIDE_LOCLIST(range_type) \
+ TYPE_RANGE_DATA(range_type)->stride.data.loclist
+#define TYPE_BYTE_STRIDE_KIND(range_type) \
+ TYPE_RANGE_DATA(range_type)->stride.kind
+

/* Attribute accessors for VLA support. */
#define TYPE_DATA_LOCATION(thistype) \
@@ -1247,6 +1260,9 @@ extern void allocate_gnat_aux_type (struct type *);
TYPE_HIGH_BOUND_UNDEFINED(TYPE_INDEX_TYPE(arraytype))
#define TYPE_ARRAY_LOWER_BOUND_IS_UNDEFINED(arraytype) \
TYPE_LOW_BOUND_UNDEFINED(TYPE_INDEX_TYPE(arraytype))
+#define TYPE_ARRAY_STRIDE_IS_UNDEFINED(arraytype) \
+ (TYPE_BYTE_STRIDE(TYPE_INDEX_TYPE(arraytype)) == 0)
+

#define TYPE_ARRAY_UPPER_BOUND_VALUE(arraytype) \
(TYPE_HIGH_BOUND(TYPE_INDEX_TYPE((arraytype))))
@@ -1712,6 +1728,7 @@ extern struct type *create_array_type_with_stride

extern struct type *create_range_type (struct type *, struct type *,
const struct dynamic_prop *,
+ const struct dynamic_prop *,
const struct dynamic_prop *);

extern struct type *create_array_type (struct type *, struct type *,
diff --git a/gdb/valarith.c b/gdb/valarith.c
index bddb9db..7b84a4e 100644
--- a/gdb/valarith.c
+++ b/gdb/valarith.c
@@ -195,9 +195,21 @@ value_subscripted_rvalue (struct value *array, LONGEST index, int lowerbound)
struct type *array_type = check_typedef (value_type (array));
struct type *elt_type = check_typedef (TYPE_TARGET_TYPE (array_type));
unsigned int elt_size = TYPE_LENGTH (elt_type);
- unsigned int elt_offs = elt_size * longest_to_int (index - lowerbound);
+ unsigned int elt_offs = longest_to_int (index - lowerbound);
+ LONGEST elt_stride = TYPE_BYTE_STRIDE (TYPE_INDEX_TYPE (array_type));
struct value *v;

+ if (elt_stride > 0)
+ elt_offs *= elt_stride;
+ else if (elt_stride < 0)
+ {
+ int offs = (elt_offs + 1) * elt_stride;
+
+ elt_offs = TYPE_LENGTH (array_type) + offs;
+ }
+ else
+ elt_offs *= elt_size;
+
if (index < lowerbound || (!TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (array_type)
&& elt_offs >= TYPE_LENGTH (array_type)))
{
--
1.7.9.5