diff options
Diffstat (limited to 'gdb/ada-lang.c')
| -rw-r--r-- | gdb/ada-lang.c | 83 |
1 files changed, 43 insertions, 40 deletions
diff --git a/gdb/ada-lang.c b/gdb/ada-lang.c index 2d9aa35..b99e197 100644 --- a/gdb/ada-lang.c +++ b/gdb/ada-lang.c @@ -2170,6 +2170,37 @@ ada_value_ptr_subscript (struct value *arr, struct type *type, int arity, return value_ind (arr); } +/* Given that ARRAY_PTR is a pointer or reference to an array of type TYPE (the + actual type of ARRAY_PTR is ignored), returns a reference to + the Ada slice of HIGH-LOW+1 elements starting at index LOW. The lower + bound of this array is LOW, as per Ada rules. */ +static struct value * +ada_value_slice_ptr (struct value *array_ptr, struct type *type, + int low, int high) +{ + CORE_ADDR base = value_as_address (array_ptr) + + ((low - TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))) + * TYPE_LENGTH (TYPE_TARGET_TYPE (type))); + struct type *index_type = + create_range_type (NULL, TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (type)), + low, high); + struct type *slice_type = + create_array_type (NULL, TYPE_TARGET_TYPE (type), index_type); + return value_from_pointer (lookup_reference_type (slice_type), base); +} + + +static struct value * +ada_value_slice (struct value *array, int low, int high) +{ + struct type *type = VALUE_TYPE (array); + struct type *index_type = + create_range_type (NULL, TYPE_INDEX_TYPE (type), low, high); + struct type *slice_type = + create_array_type (NULL, TYPE_TARGET_TYPE (type), index_type); + return value_cast (slice_type, value_slice (array, low, high-low+1)); +} + /* If type is a record type in the form of a standard GNAT array descriptor, returns the number of dimensions for type. If arr is a simple array, returns the number of "array of"s that prefix its @@ -2400,8 +2431,11 @@ ada_array_length (struct value *arr, int n) static struct value * empty_array (struct type *arr_type, int low) { - return allocate_value (create_range_type (NULL, TYPE_INDEX_TYPE (arr_type), - low, low - 1)); + struct type *index_type = + create_range_type (NULL, TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (arr_type)), + low, low - 1); + struct type *elt_type = ada_array_element_type (arr_type, 1); + return allocate_value (create_array_type (NULL, elt_type, index_type)); } @@ -8922,11 +8956,6 @@ ada_evaluate_subexp (struct type *expect_type, struct expression *exp, { int arity; - /* Make sure to use the parallel ___XVS type if any. - Otherwise, we won't be able to find the array arity - and element type. */ - type = ada_get_base_type (type); - arity = ada_array_arity (type); type = ada_array_element_type (type, nargs); if (type == NULL) @@ -8981,14 +9010,6 @@ ada_evaluate_subexp (struct type *expect_type, struct expression *exp, if (noside == EVAL_SKIP) goto nosideret; - /* If this is a reference type or a pointer type, and - the target type has an XVS parallel type, then get - the real target type. */ - if (TYPE_CODE (VALUE_TYPE (array)) == TYPE_CODE_REF - || TYPE_CODE (VALUE_TYPE (array)) == TYPE_CODE_PTR) - TYPE_TARGET_TYPE (VALUE_TYPE (array)) = - ada_get_base_type (TYPE_TARGET_TYPE (VALUE_TYPE (array))); - /* If this is a reference to an aligner type, then remove all the aligners. */ if (TYPE_CODE (VALUE_TYPE (array)) == TYPE_CODE_REF @@ -9007,26 +9028,15 @@ ada_evaluate_subexp (struct type *expect_type, struct expression *exp, array = value_addr (array); if (noside == EVAL_AVOID_SIDE_EFFECTS - && ada_is_array_descriptor_type - (check_typedef (VALUE_TYPE (array)))) - { - /* Try dereferencing the array, in case it is an access - to array. */ - struct type *arrType = ada_type_of_array (array, 0); - if (arrType != NULL) - array = value_at_lazy (arrType, 0, NULL); - } + && ada_is_array_descriptor_type (check_typedef + (VALUE_TYPE (array)))) + return empty_array (ada_type_of_array (array, 0), low_bound); array = ada_coerce_to_simple_array_ptr (array); - /* When EVAL_AVOID_SIDE_EFFECTS, we may get the bounds wrong, - but only in contexts where the value is not being requested - (FIXME?). */ if (TYPE_CODE (VALUE_TYPE (array)) == TYPE_CODE_PTR) { - if (noside == EVAL_AVOID_SIDE_EFFECTS) - return ada_value_ind (array); - else if (high_bound < low_bound) + if (high_bound < low_bound || noside == EVAL_AVOID_SIDE_EFFECTS) return empty_array (TYPE_TARGET_TYPE (VALUE_TYPE (array)), low_bound); else @@ -9034,15 +9044,8 @@ ada_evaluate_subexp (struct type *expect_type, struct expression *exp, struct type *arr_type0 = to_fixed_array_type (TYPE_TARGET_TYPE (VALUE_TYPE (array)), NULL, 1); - struct value *item0 = - ada_value_ptr_subscript (array, arr_type0, 1, - &low_bound_val); - struct value *slice = - value_repeat (item0, high_bound - low_bound + 1); - struct type *arr_type1 = VALUE_TYPE (slice); - TYPE_LOW_BOUND (TYPE_INDEX_TYPE (arr_type1)) = low_bound; - TYPE_HIGH_BOUND (TYPE_INDEX_TYPE (arr_type1)) += low_bound; - return slice; + return ada_value_slice_ptr (array, arr_type0, + (int) low_bound, (int) high_bound); } } else if (noside == EVAL_AVOID_SIDE_EFFECTS) @@ -9050,7 +9053,7 @@ ada_evaluate_subexp (struct type *expect_type, struct expression *exp, else if (high_bound < low_bound) return empty_array (VALUE_TYPE (array), low_bound); else - return value_slice (array, low_bound, high_bound - low_bound + 1); + return ada_value_slice (array, (int) low_bound, (int) high_bound); } case UNOP_IN_RANGE: |