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2478d075da
This is an issue which I noticed while working on trying to print
an array of variant records. For instance, trying to print "A1",
an array of elements whose size is variable, defined as follow
(see gdb.ada/var_rec_arr testcase):
subtype Small_Type is Integer range 0 .. 10;
type Record_Type (I : Small_Type := 0) is record
S : String (1 .. I);
end record;
function Ident (R : Record_Type) return Record_Type;
type Array_Type is array (Integer range <>) of Record_Type;
A1 : Array_Type := (1 => (I => 0, S => <>),
2 => (I => 1, S => "A"),
3 => (I => 2, S => "AB"));
The debugger sometimes prints the array as follow:
(gdb) print A1
$1 = ((i => 0, s => ""), (i => 0, s => ""), (i => 0, s => ""))
The problem happens inside the part of the loop printing the array's
elements, while trying to count the number of consecutive elements
that have the same value (in order to replace them by the "<repeats
nnn times>" message when the number exceeds a threshold). In particular,
in ada-valprint.c::val_print_packed_array_elements:
elttype = TYPE_TARGET_TYPE (type);
eltlen = TYPE_LENGTH (check_typedef (elttype));
while (...)
{
if (!value_contents_eq (v0, value_embedded_offset (v0),
v1, value_embedded_offset (v1),
eltlen))
break;
The value comparison is performed using value_contents_eq but makes
the assumption that elttype is not dynamic, which is not always true.
In particular, in the case above, elttype is dynamic and therefore
its TYPE_LENGTH changes from element to element.
As it happens in this case, the eltlen is zero, which causes the call
to value_contents_eq to return true, and therefore GDB thinks all
3 elements of the array are equal.
This patch fixes the issue by making sure that both v0 and v1, which
are values whose type we expect to be resolved, have identical lengths.
If not, then the two elements of the array cannot possibly have the
same value and we do not even need to do the binary comparison.
Unfortunately, this is still not enough to get GDB to print the correct
value for our array, because the assumption that v0 and v1 have a type
which has been resolved is actually not met. So, the second part of
the patch modifies the function that constructed the values to make
sure dynamic types do get resolved.
gdb/ChangeLog:
* ada-valprint.c (val_print_packed_array_elements): Delete
variable "len". Add a type-length check when comparing two
consecutive elements of the array. Use the element's actual
length in call to value_contents_eq.
* ada-lang.c (ada_value_primitive_packed_val): Always return
a value whose type has been resolved.
1228 lines
35 KiB
C
1228 lines
35 KiB
C
/* Support for printing Ada values for GDB, the GNU debugger.
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Copyright (C) 1986-2015 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include <ctype.h>
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "value.h"
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#include "demangle.h"
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#include "valprint.h"
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#include "language.h"
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#include "annotate.h"
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#include "ada-lang.h"
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#include "c-lang.h"
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#include "infcall.h"
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#include "objfiles.h"
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static int print_field_values (struct type *, const gdb_byte *,
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int,
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struct ui_file *, int,
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const struct value *,
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const struct value_print_options *,
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int, struct type *, int,
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const struct language_defn *);
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/* Make TYPE unsigned if its range of values includes no negatives. */
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static void
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adjust_type_signedness (struct type *type)
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{
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if (type != NULL && TYPE_CODE (type) == TYPE_CODE_RANGE
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&& TYPE_LOW_BOUND (type) >= 0)
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TYPE_UNSIGNED (type) = 1;
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}
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/* Assuming TYPE is a simple array type, prints its lower bound on STREAM,
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if non-standard (i.e., other than 1 for numbers, other than lower bound
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of index type for enumerated type). Returns 1 if something printed,
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otherwise 0. */
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static int
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print_optional_low_bound (struct ui_file *stream, struct type *type,
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const struct value_print_options *options)
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{
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struct type *index_type;
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LONGEST low_bound;
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LONGEST high_bound;
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if (options->print_array_indexes)
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return 0;
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if (!get_array_bounds (type, &low_bound, &high_bound))
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return 0;
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/* If this is an empty array, then don't print the lower bound.
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That would be confusing, because we would print the lower bound,
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followed by... nothing! */
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if (low_bound > high_bound)
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return 0;
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index_type = TYPE_INDEX_TYPE (type);
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while (TYPE_CODE (index_type) == TYPE_CODE_RANGE)
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{
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/* We need to know what the base type is, in order to do the
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appropriate check below. Otherwise, if this is a subrange
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of an enumerated type, where the underlying value of the
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first element is typically 0, we might test the low bound
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against the wrong value. */
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index_type = TYPE_TARGET_TYPE (index_type);
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}
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switch (TYPE_CODE (index_type))
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{
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case TYPE_CODE_BOOL:
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if (low_bound == 0)
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return 0;
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break;
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case TYPE_CODE_ENUM:
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if (low_bound == TYPE_FIELD_ENUMVAL (index_type, 0))
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return 0;
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break;
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case TYPE_CODE_UNDEF:
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index_type = NULL;
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/* FALL THROUGH */
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default:
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if (low_bound == 1)
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return 0;
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break;
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}
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ada_print_scalar (index_type, low_bound, stream);
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fprintf_filtered (stream, " => ");
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return 1;
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}
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/* Version of val_print_array_elements for GNAT-style packed arrays.
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Prints elements of packed array of type TYPE at bit offset
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BITOFFSET from VALADDR on STREAM. Formats according to OPTIONS and
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separates with commas. RECURSE is the recursion (nesting) level.
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TYPE must have been decoded (as by ada_coerce_to_simple_array). */
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static void
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val_print_packed_array_elements (struct type *type, const gdb_byte *valaddr,
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int offset,
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int bitoffset, struct ui_file *stream,
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int recurse,
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const struct value *val,
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const struct value_print_options *options)
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{
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unsigned int i;
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unsigned int things_printed = 0;
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unsigned len;
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struct type *elttype, *index_type;
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unsigned long bitsize = TYPE_FIELD_BITSIZE (type, 0);
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struct value *mark = value_mark ();
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LONGEST low = 0;
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elttype = TYPE_TARGET_TYPE (type);
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index_type = TYPE_INDEX_TYPE (type);
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{
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LONGEST high;
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if (get_discrete_bounds (index_type, &low, &high) < 0)
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len = 1;
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else
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len = high - low + 1;
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}
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i = 0;
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annotate_array_section_begin (i, elttype);
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while (i < len && things_printed < options->print_max)
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{
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struct value *v0, *v1;
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int i0;
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if (i != 0)
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{
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if (options->prettyformat_arrays)
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{
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fprintf_filtered (stream, ",\n");
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print_spaces_filtered (2 + 2 * recurse, stream);
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}
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else
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{
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fprintf_filtered (stream, ", ");
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}
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}
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wrap_here (n_spaces (2 + 2 * recurse));
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maybe_print_array_index (index_type, i + low, stream, options);
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i0 = i;
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v0 = ada_value_primitive_packed_val (NULL, valaddr + offset,
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(i0 * bitsize) / HOST_CHAR_BIT,
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(i0 * bitsize) % HOST_CHAR_BIT,
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bitsize, elttype);
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while (1)
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{
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i += 1;
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if (i >= len)
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break;
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v1 = ada_value_primitive_packed_val (NULL, valaddr + offset,
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(i * bitsize) / HOST_CHAR_BIT,
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(i * bitsize) % HOST_CHAR_BIT,
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bitsize, elttype);
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if (TYPE_LENGTH (check_typedef (value_type (v0)))
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!= TYPE_LENGTH (check_typedef (value_type (v1))))
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break;
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if (!value_contents_eq (v0, value_embedded_offset (v0),
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v1, value_embedded_offset (v1),
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TYPE_LENGTH (check_typedef (value_type (v0)))))
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break;
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}
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if (i - i0 > options->repeat_count_threshold)
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{
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struct value_print_options opts = *options;
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opts.deref_ref = 0;
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val_print (elttype, value_contents_for_printing (v0),
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value_embedded_offset (v0), 0, stream,
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recurse + 1, v0, &opts, current_language);
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annotate_elt_rep (i - i0);
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fprintf_filtered (stream, _(" <repeats %u times>"), i - i0);
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annotate_elt_rep_end ();
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}
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else
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{
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int j;
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struct value_print_options opts = *options;
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opts.deref_ref = 0;
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for (j = i0; j < i; j += 1)
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{
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if (j > i0)
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{
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if (options->prettyformat_arrays)
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{
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fprintf_filtered (stream, ",\n");
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print_spaces_filtered (2 + 2 * recurse, stream);
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}
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else
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{
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fprintf_filtered (stream, ", ");
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}
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wrap_here (n_spaces (2 + 2 * recurse));
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maybe_print_array_index (index_type, j + low,
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stream, options);
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}
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val_print (elttype, value_contents_for_printing (v0),
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value_embedded_offset (v0), 0, stream,
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recurse + 1, v0, &opts, current_language);
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annotate_elt ();
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}
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}
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things_printed += i - i0;
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}
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annotate_array_section_end ();
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if (i < len)
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{
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fprintf_filtered (stream, "...");
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}
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value_free_to_mark (mark);
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}
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static struct type *
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printable_val_type (struct type *type, const gdb_byte *valaddr)
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{
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return ada_to_fixed_type (ada_aligned_type (type), valaddr, 0, NULL, 1);
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}
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/* Print the character C on STREAM as part of the contents of a literal
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string whose delimiter is QUOTER. TYPE_LEN is the length in bytes
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of the character. */
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void
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ada_emit_char (int c, struct type *type, struct ui_file *stream,
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int quoter, int type_len)
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{
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/* If this character fits in the normal ASCII range, and is
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a printable character, then print the character as if it was
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an ASCII character, even if this is a wide character.
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The UCHAR_MAX check is necessary because the isascii function
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requires that its argument have a value of an unsigned char,
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or EOF (EOF is obviously not printable). */
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if (c <= UCHAR_MAX && isascii (c) && isprint (c))
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{
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if (c == quoter && c == '"')
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fprintf_filtered (stream, "\"\"");
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else
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fprintf_filtered (stream, "%c", c);
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}
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else
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fprintf_filtered (stream, "[\"%0*x\"]", type_len * 2, c);
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}
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/* Character #I of STRING, given that TYPE_LEN is the size in bytes
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of a character. */
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static int
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char_at (const gdb_byte *string, int i, int type_len,
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enum bfd_endian byte_order)
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{
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if (type_len == 1)
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return string[i];
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else
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return (int) extract_unsigned_integer (string + type_len * i,
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type_len, byte_order);
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}
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/* Print a floating-point value of type TYPE, pointed to in GDB by
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VALADDR, on STREAM. Use Ada formatting conventions: there must be
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a decimal point, and at least one digit before and after the
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point. We use the GNAT format for NaNs and infinities. */
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static void
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ada_print_floating (const gdb_byte *valaddr, struct type *type,
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struct ui_file *stream)
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{
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char *s, *result;
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struct ui_file *tmp_stream = mem_fileopen ();
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struct cleanup *cleanups = make_cleanup_ui_file_delete (tmp_stream);
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print_floating (valaddr, type, tmp_stream);
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result = ui_file_xstrdup (tmp_stream, NULL);
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make_cleanup (xfree, result);
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/* Modify for Ada rules. */
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s = strstr (result, "inf");
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if (s == NULL)
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s = strstr (result, "Inf");
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if (s == NULL)
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s = strstr (result, "INF");
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if (s != NULL)
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strcpy (s, "Inf");
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if (s == NULL)
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{
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s = strstr (result, "nan");
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if (s == NULL)
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s = strstr (result, "NaN");
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if (s == NULL)
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s = strstr (result, "Nan");
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if (s != NULL)
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{
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s[0] = s[2] = 'N';
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if (result[0] == '-')
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result += 1;
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}
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}
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if (s == NULL && strchr (result, '.') == NULL)
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{
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s = strchr (result, 'e');
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if (s == NULL)
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fprintf_filtered (stream, "%s.0", result);
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else
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fprintf_filtered (stream, "%.*s.0%s", (int) (s-result), result, s);
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}
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else
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fprintf_filtered (stream, "%s", result);
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do_cleanups (cleanups);
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}
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void
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ada_printchar (int c, struct type *type, struct ui_file *stream)
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{
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fputs_filtered ("'", stream);
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ada_emit_char (c, type, stream, '\'', TYPE_LENGTH (type));
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fputs_filtered ("'", stream);
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}
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/* [From print_type_scalar in typeprint.c]. Print VAL on STREAM in a
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form appropriate for TYPE, if non-NULL. If TYPE is NULL, print VAL
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like a default signed integer. */
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void
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ada_print_scalar (struct type *type, LONGEST val, struct ui_file *stream)
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{
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unsigned int i;
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unsigned len;
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if (!type)
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{
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print_longest (stream, 'd', 0, val);
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return;
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}
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type = ada_check_typedef (type);
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switch (TYPE_CODE (type))
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{
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case TYPE_CODE_ENUM:
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len = TYPE_NFIELDS (type);
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for (i = 0; i < len; i++)
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{
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if (TYPE_FIELD_ENUMVAL (type, i) == val)
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{
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break;
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}
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}
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if (i < len)
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{
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fputs_filtered (ada_enum_name (TYPE_FIELD_NAME (type, i)), stream);
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}
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else
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{
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print_longest (stream, 'd', 0, val);
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}
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break;
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case TYPE_CODE_INT:
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print_longest (stream, TYPE_UNSIGNED (type) ? 'u' : 'd', 0, val);
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break;
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case TYPE_CODE_CHAR:
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LA_PRINT_CHAR (val, type, stream);
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break;
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case TYPE_CODE_BOOL:
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fprintf_filtered (stream, val ? "true" : "false");
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break;
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case TYPE_CODE_RANGE:
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ada_print_scalar (TYPE_TARGET_TYPE (type), val, stream);
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return;
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case TYPE_CODE_UNDEF:
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case TYPE_CODE_PTR:
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case TYPE_CODE_ARRAY:
|
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case TYPE_CODE_STRUCT:
|
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case TYPE_CODE_UNION:
|
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case TYPE_CODE_FUNC:
|
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case TYPE_CODE_FLT:
|
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case TYPE_CODE_VOID:
|
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case TYPE_CODE_SET:
|
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case TYPE_CODE_STRING:
|
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case TYPE_CODE_ERROR:
|
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case TYPE_CODE_MEMBERPTR:
|
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case TYPE_CODE_METHODPTR:
|
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case TYPE_CODE_METHOD:
|
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case TYPE_CODE_REF:
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warning (_("internal error: unhandled type in ada_print_scalar"));
|
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break;
|
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|
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default:
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error (_("Invalid type code in symbol table."));
|
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}
|
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gdb_flush (stream);
|
||
}
|
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|
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/* Print the character string STRING, printing at most LENGTH characters.
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Printing stops early if the number hits print_max; repeat counts
|
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are printed as appropriate. Print ellipses at the end if we
|
||
had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
|
||
TYPE_LEN is the length (1 or 2) of the character type. */
|
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|
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static void
|
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printstr (struct ui_file *stream, struct type *elttype, const gdb_byte *string,
|
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unsigned int length, int force_ellipses, int type_len,
|
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const struct value_print_options *options)
|
||
{
|
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enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (elttype));
|
||
unsigned int i;
|
||
unsigned int things_printed = 0;
|
||
int in_quotes = 0;
|
||
int need_comma = 0;
|
||
|
||
if (length == 0)
|
||
{
|
||
fputs_filtered ("\"\"", stream);
|
||
return;
|
||
}
|
||
|
||
for (i = 0; i < length && things_printed < options->print_max; i += 1)
|
||
{
|
||
/* Position of the character we are examining
|
||
to see whether it is repeated. */
|
||
unsigned int rep1;
|
||
/* Number of repetitions we have detected so far. */
|
||
unsigned int reps;
|
||
|
||
QUIT;
|
||
|
||
if (need_comma)
|
||
{
|
||
fputs_filtered (", ", stream);
|
||
need_comma = 0;
|
||
}
|
||
|
||
rep1 = i + 1;
|
||
reps = 1;
|
||
while (rep1 < length
|
||
&& char_at (string, rep1, type_len, byte_order)
|
||
== char_at (string, i, type_len, byte_order))
|
||
{
|
||
rep1 += 1;
|
||
reps += 1;
|
||
}
|
||
|
||
if (reps > options->repeat_count_threshold)
|
||
{
|
||
if (in_quotes)
|
||
{
|
||
fputs_filtered ("\", ", stream);
|
||
in_quotes = 0;
|
||
}
|
||
fputs_filtered ("'", stream);
|
||
ada_emit_char (char_at (string, i, type_len, byte_order),
|
||
elttype, stream, '\'', type_len);
|
||
fputs_filtered ("'", stream);
|
||
fprintf_filtered (stream, _(" <repeats %u times>"), reps);
|
||
i = rep1 - 1;
|
||
things_printed += options->repeat_count_threshold;
|
||
need_comma = 1;
|
||
}
|
||
else
|
||
{
|
||
if (!in_quotes)
|
||
{
|
||
fputs_filtered ("\"", stream);
|
||
in_quotes = 1;
|
||
}
|
||
ada_emit_char (char_at (string, i, type_len, byte_order),
|
||
elttype, stream, '"', type_len);
|
||
things_printed += 1;
|
||
}
|
||
}
|
||
|
||
/* Terminate the quotes if necessary. */
|
||
if (in_quotes)
|
||
fputs_filtered ("\"", stream);
|
||
|
||
if (force_ellipses || i < length)
|
||
fputs_filtered ("...", stream);
|
||
}
|
||
|
||
void
|
||
ada_printstr (struct ui_file *stream, struct type *type,
|
||
const gdb_byte *string, unsigned int length,
|
||
const char *encoding, int force_ellipses,
|
||
const struct value_print_options *options)
|
||
{
|
||
printstr (stream, type, string, length, force_ellipses, TYPE_LENGTH (type),
|
||
options);
|
||
}
|
||
|
||
static int
|
||
print_variant_part (struct type *type, int field_num,
|
||
const gdb_byte *valaddr, int offset,
|
||
struct ui_file *stream, int recurse,
|
||
const struct value *val,
|
||
const struct value_print_options *options,
|
||
int comma_needed,
|
||
struct type *outer_type, int outer_offset,
|
||
const struct language_defn *language)
|
||
{
|
||
struct type *var_type = TYPE_FIELD_TYPE (type, field_num);
|
||
int which = ada_which_variant_applies (var_type, outer_type,
|
||
valaddr + outer_offset);
|
||
|
||
if (which < 0)
|
||
return 0;
|
||
else
|
||
return print_field_values
|
||
(TYPE_FIELD_TYPE (var_type, which),
|
||
valaddr,
|
||
offset + TYPE_FIELD_BITPOS (type, field_num) / HOST_CHAR_BIT
|
||
+ TYPE_FIELD_BITPOS (var_type, which) / HOST_CHAR_BIT,
|
||
stream, recurse, val, options,
|
||
comma_needed, outer_type, outer_offset, language);
|
||
}
|
||
|
||
/* Print out fields of value at VALADDR + OFFSET having structure type TYPE.
|
||
|
||
TYPE, VALADDR, OFFSET, STREAM, RECURSE, and OPTIONS have the same
|
||
meanings as in ada_print_value and ada_val_print.
|
||
|
||
OUTER_TYPE and OUTER_OFFSET give type and address of enclosing
|
||
record (used to get discriminant values when printing variant
|
||
parts).
|
||
|
||
COMMA_NEEDED is 1 if fields have been printed at the current recursion
|
||
level, so that a comma is needed before any field printed by this
|
||
call.
|
||
|
||
Returns 1 if COMMA_NEEDED or any fields were printed. */
|
||
|
||
static int
|
||
print_field_values (struct type *type, const gdb_byte *valaddr,
|
||
int offset, struct ui_file *stream, int recurse,
|
||
const struct value *val,
|
||
const struct value_print_options *options,
|
||
int comma_needed,
|
||
struct type *outer_type, int outer_offset,
|
||
const struct language_defn *language)
|
||
{
|
||
int i, len;
|
||
|
||
len = TYPE_NFIELDS (type);
|
||
|
||
for (i = 0; i < len; i += 1)
|
||
{
|
||
if (ada_is_ignored_field (type, i))
|
||
continue;
|
||
|
||
if (ada_is_wrapper_field (type, i))
|
||
{
|
||
comma_needed =
|
||
print_field_values (TYPE_FIELD_TYPE (type, i),
|
||
valaddr,
|
||
(offset
|
||
+ TYPE_FIELD_BITPOS (type, i) / HOST_CHAR_BIT),
|
||
stream, recurse, val, options,
|
||
comma_needed, type, offset, language);
|
||
continue;
|
||
}
|
||
else if (ada_is_variant_part (type, i))
|
||
{
|
||
comma_needed =
|
||
print_variant_part (type, i, valaddr,
|
||
offset, stream, recurse, val,
|
||
options, comma_needed,
|
||
outer_type, outer_offset, language);
|
||
continue;
|
||
}
|
||
|
||
if (comma_needed)
|
||
fprintf_filtered (stream, ", ");
|
||
comma_needed = 1;
|
||
|
||
if (options->prettyformat)
|
||
{
|
||
fprintf_filtered (stream, "\n");
|
||
print_spaces_filtered (2 + 2 * recurse, stream);
|
||
}
|
||
else
|
||
{
|
||
wrap_here (n_spaces (2 + 2 * recurse));
|
||
}
|
||
|
||
annotate_field_begin (TYPE_FIELD_TYPE (type, i));
|
||
fprintf_filtered (stream, "%.*s",
|
||
ada_name_prefix_len (TYPE_FIELD_NAME (type, i)),
|
||
TYPE_FIELD_NAME (type, i));
|
||
annotate_field_name_end ();
|
||
fputs_filtered (" => ", stream);
|
||
annotate_field_value ();
|
||
|
||
if (TYPE_FIELD_PACKED (type, i))
|
||
{
|
||
struct value *v;
|
||
|
||
/* Bitfields require special handling, especially due to byte
|
||
order problems. */
|
||
if (HAVE_CPLUS_STRUCT (type) && TYPE_FIELD_IGNORE (type, i))
|
||
{
|
||
fputs_filtered (_("<optimized out or zero length>"), stream);
|
||
}
|
||
else
|
||
{
|
||
int bit_pos = TYPE_FIELD_BITPOS (type, i);
|
||
int bit_size = TYPE_FIELD_BITSIZE (type, i);
|
||
struct value_print_options opts;
|
||
|
||
adjust_type_signedness (TYPE_FIELD_TYPE (type, i));
|
||
v = ada_value_primitive_packed_val
|
||
(NULL, valaddr,
|
||
offset + bit_pos / HOST_CHAR_BIT,
|
||
bit_pos % HOST_CHAR_BIT,
|
||
bit_size, TYPE_FIELD_TYPE (type, i));
|
||
opts = *options;
|
||
opts.deref_ref = 0;
|
||
val_print (TYPE_FIELD_TYPE (type, i),
|
||
value_contents_for_printing (v),
|
||
value_embedded_offset (v), 0,
|
||
stream, recurse + 1, v,
|
||
&opts, language);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
struct value_print_options opts = *options;
|
||
|
||
opts.deref_ref = 0;
|
||
val_print (TYPE_FIELD_TYPE (type, i), valaddr,
|
||
(offset + TYPE_FIELD_BITPOS (type, i) / HOST_CHAR_BIT),
|
||
0, stream, recurse + 1, val, &opts, language);
|
||
}
|
||
annotate_field_end ();
|
||
}
|
||
|
||
return comma_needed;
|
||
}
|
||
|
||
/* Implement Ada val_print'ing for the case where TYPE is
|
||
a TYPE_CODE_ARRAY of characters. */
|
||
|
||
static void
|
||
ada_val_print_string (struct type *type, const gdb_byte *valaddr,
|
||
int offset, int offset_aligned, CORE_ADDR address,
|
||
struct ui_file *stream, int recurse,
|
||
const struct value *original_value,
|
||
const struct value_print_options *options)
|
||
{
|
||
enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type));
|
||
struct type *elttype = TYPE_TARGET_TYPE (type);
|
||
unsigned int eltlen;
|
||
unsigned int len;
|
||
|
||
/* We know that ELTTYPE cannot possibly be null, because we assume
|
||
that we're called only when TYPE is a string-like type.
|
||
Similarly, the size of ELTTYPE should also be non-null, since
|
||
it's a character-like type. */
|
||
gdb_assert (elttype != NULL);
|
||
gdb_assert (TYPE_LENGTH (elttype) != 0);
|
||
|
||
eltlen = TYPE_LENGTH (elttype);
|
||
len = TYPE_LENGTH (type) / eltlen;
|
||
|
||
if (options->prettyformat_arrays)
|
||
print_spaces_filtered (2 + 2 * recurse, stream);
|
||
|
||
/* If requested, look for the first null char and only print
|
||
elements up to it. */
|
||
if (options->stop_print_at_null)
|
||
{
|
||
int temp_len;
|
||
|
||
/* Look for a NULL char. */
|
||
for (temp_len = 0;
|
||
(temp_len < len
|
||
&& temp_len < options->print_max
|
||
&& char_at (valaddr + offset_aligned,
|
||
temp_len, eltlen, byte_order) != 0);
|
||
temp_len += 1);
|
||
len = temp_len;
|
||
}
|
||
|
||
printstr (stream, elttype, valaddr + offset_aligned, len, 0,
|
||
eltlen, options);
|
||
}
|
||
|
||
/* Implement Ada val_print-ing for GNAT arrays (Eg. fat pointers,
|
||
thin pointers, etc). */
|
||
|
||
static void
|
||
ada_val_print_gnat_array (struct type *type, const gdb_byte *valaddr,
|
||
int offset, CORE_ADDR address,
|
||
struct ui_file *stream, int recurse,
|
||
const struct value *original_value,
|
||
const struct value_print_options *options,
|
||
const struct language_defn *language)
|
||
{
|
||
struct value *mark = value_mark ();
|
||
struct value *val;
|
||
|
||
val = value_from_contents_and_address (type, valaddr + offset, address);
|
||
/* If this is a reference, coerce it now. This helps taking care
|
||
of the case where ADDRESS is meaningless because original_value
|
||
was not an lval. */
|
||
val = coerce_ref (val);
|
||
if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF) /* array access type. */
|
||
val = ada_coerce_to_simple_array_ptr (val);
|
||
else
|
||
val = ada_coerce_to_simple_array (val);
|
||
if (val == NULL)
|
||
{
|
||
gdb_assert (TYPE_CODE (type) == TYPE_CODE_TYPEDEF);
|
||
fprintf_filtered (stream, "0x0");
|
||
}
|
||
else
|
||
val_print (value_type (val), value_contents_for_printing (val),
|
||
value_embedded_offset (val), value_address (val),
|
||
stream, recurse, val, options, language);
|
||
value_free_to_mark (mark);
|
||
}
|
||
|
||
/* Implement Ada val_print'ing for the case where TYPE is
|
||
a TYPE_CODE_PTR. */
|
||
|
||
static void
|
||
ada_val_print_ptr (struct type *type, const gdb_byte *valaddr,
|
||
int offset, int offset_aligned, CORE_ADDR address,
|
||
struct ui_file *stream, int recurse,
|
||
const struct value *original_value,
|
||
const struct value_print_options *options,
|
||
const struct language_defn *language)
|
||
{
|
||
val_print (type, valaddr, offset, address, stream, recurse,
|
||
original_value, options, language_def (language_c));
|
||
|
||
if (ada_is_tag_type (type))
|
||
{
|
||
struct value *val =
|
||
value_from_contents_and_address (type,
|
||
valaddr + offset_aligned,
|
||
address + offset_aligned);
|
||
const char *name = ada_tag_name (val);
|
||
|
||
if (name != NULL)
|
||
fprintf_filtered (stream, " (%s)", name);
|
||
}
|
||
}
|
||
|
||
/* Implement Ada val_print'ing for the case where TYPE is
|
||
a TYPE_CODE_INT or TYPE_CODE_RANGE. */
|
||
|
||
static void
|
||
ada_val_print_num (struct type *type, const gdb_byte *valaddr,
|
||
int offset, int offset_aligned, CORE_ADDR address,
|
||
struct ui_file *stream, int recurse,
|
||
const struct value *original_value,
|
||
const struct value_print_options *options,
|
||
const struct language_defn *language)
|
||
{
|
||
if (ada_is_fixed_point_type (type))
|
||
{
|
||
LONGEST v = unpack_long (type, valaddr + offset_aligned);
|
||
|
||
fprintf_filtered (stream, TYPE_LENGTH (type) < 4 ? "%.11g" : "%.17g",
|
||
(double) ada_fixed_to_float (type, v));
|
||
return;
|
||
}
|
||
else if (TYPE_CODE (type) == TYPE_CODE_RANGE)
|
||
{
|
||
struct type *target_type = TYPE_TARGET_TYPE (type);
|
||
|
||
if (TYPE_LENGTH (type) != TYPE_LENGTH (target_type))
|
||
{
|
||
/* Obscure case of range type that has different length from
|
||
its base type. Perform a conversion, or we will get a
|
||
nonsense value. Actually, we could use the same
|
||
code regardless of lengths; I'm just avoiding a cast. */
|
||
struct value *v1
|
||
= value_from_contents_and_address (type, valaddr + offset, 0);
|
||
struct value *v = value_cast (target_type, v1);
|
||
|
||
val_print (target_type, value_contents_for_printing (v),
|
||
value_embedded_offset (v), 0, stream,
|
||
recurse + 1, v, options, language);
|
||
}
|
||
else
|
||
val_print (TYPE_TARGET_TYPE (type), valaddr, offset,
|
||
address, stream, recurse, original_value,
|
||
options, language);
|
||
return;
|
||
}
|
||
else
|
||
{
|
||
int format = (options->format ? options->format
|
||
: options->output_format);
|
||
|
||
if (format)
|
||
{
|
||
struct value_print_options opts = *options;
|
||
|
||
opts.format = format;
|
||
val_print_scalar_formatted (type, valaddr, offset_aligned,
|
||
original_value, &opts, 0, stream);
|
||
}
|
||
else if (ada_is_system_address_type (type))
|
||
{
|
||
/* FIXME: We want to print System.Address variables using
|
||
the same format as for any access type. But for some
|
||
reason GNAT encodes the System.Address type as an int,
|
||
so we have to work-around this deficiency by handling
|
||
System.Address values as a special case. */
|
||
|
||
struct gdbarch *gdbarch = get_type_arch (type);
|
||
struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
|
||
CORE_ADDR addr = extract_typed_address (valaddr + offset_aligned,
|
||
ptr_type);
|
||
|
||
fprintf_filtered (stream, "(");
|
||
type_print (type, "", stream, -1);
|
||
fprintf_filtered (stream, ") ");
|
||
fputs_filtered (paddress (gdbarch, addr), stream);
|
||
}
|
||
else
|
||
{
|
||
val_print_type_code_int (type, valaddr + offset_aligned, stream);
|
||
if (ada_is_character_type (type))
|
||
{
|
||
LONGEST c;
|
||
|
||
fputs_filtered (" ", stream);
|
||
c = unpack_long (type, valaddr + offset_aligned);
|
||
ada_printchar (c, type, stream);
|
||
}
|
||
}
|
||
return;
|
||
}
|
||
}
|
||
|
||
/* Implement Ada val_print'ing for the case where TYPE is
|
||
a TYPE_CODE_ENUM. */
|
||
|
||
static void
|
||
ada_val_print_enum (struct type *type, const gdb_byte *valaddr,
|
||
int offset, int offset_aligned, CORE_ADDR address,
|
||
struct ui_file *stream, int recurse,
|
||
const struct value *original_value,
|
||
const struct value_print_options *options,
|
||
const struct language_defn *language)
|
||
{
|
||
int i;
|
||
unsigned int len;
|
||
LONGEST val;
|
||
|
||
if (options->format)
|
||
{
|
||
val_print_scalar_formatted (type, valaddr, offset_aligned,
|
||
original_value, options, 0, stream);
|
||
return;
|
||
}
|
||
|
||
len = TYPE_NFIELDS (type);
|
||
val = unpack_long (type, valaddr + offset_aligned);
|
||
for (i = 0; i < len; i++)
|
||
{
|
||
QUIT;
|
||
if (val == TYPE_FIELD_ENUMVAL (type, i))
|
||
break;
|
||
}
|
||
|
||
if (i < len)
|
||
{
|
||
const char *name = ada_enum_name (TYPE_FIELD_NAME (type, i));
|
||
|
||
if (name[0] == '\'')
|
||
fprintf_filtered (stream, "%ld %s", (long) val, name);
|
||
else
|
||
fputs_filtered (name, stream);
|
||
}
|
||
else
|
||
print_longest (stream, 'd', 0, val);
|
||
}
|
||
|
||
/* Implement Ada val_print'ing for the case where TYPE is
|
||
a TYPE_CODE_FLT. */
|
||
|
||
static void
|
||
ada_val_print_flt (struct type *type, const gdb_byte *valaddr,
|
||
int offset, int offset_aligned, CORE_ADDR address,
|
||
struct ui_file *stream, int recurse,
|
||
const struct value *original_value,
|
||
const struct value_print_options *options,
|
||
const struct language_defn *language)
|
||
{
|
||
if (options->format)
|
||
{
|
||
val_print (type, valaddr, offset, address, stream, recurse,
|
||
original_value, options, language_def (language_c));
|
||
return;
|
||
}
|
||
|
||
ada_print_floating (valaddr + offset, type, stream);
|
||
}
|
||
|
||
/* Implement Ada val_print'ing for the case where TYPE is
|
||
a TYPE_CODE_STRUCT or TYPE_CODE_UNION. */
|
||
|
||
static void
|
||
ada_val_print_struct_union
|
||
(struct type *type, const gdb_byte *valaddr, int offset,
|
||
int offset_aligned, CORE_ADDR address, struct ui_file *stream,
|
||
int recurse, const struct value *original_value,
|
||
const struct value_print_options *options,
|
||
const struct language_defn *language)
|
||
{
|
||
if (ada_is_bogus_array_descriptor (type))
|
||
{
|
||
fprintf_filtered (stream, "(...?)");
|
||
return;
|
||
}
|
||
|
||
fprintf_filtered (stream, "(");
|
||
|
||
if (print_field_values (type, valaddr, offset_aligned,
|
||
stream, recurse, original_value, options,
|
||
0, type, offset_aligned, language) != 0
|
||
&& options->prettyformat)
|
||
{
|
||
fprintf_filtered (stream, "\n");
|
||
print_spaces_filtered (2 * recurse, stream);
|
||
}
|
||
|
||
fprintf_filtered (stream, ")");
|
||
}
|
||
|
||
/* Implement Ada val_print'ing for the case where TYPE is
|
||
a TYPE_CODE_ARRAY. */
|
||
|
||
static void
|
||
ada_val_print_array (struct type *type, const gdb_byte *valaddr,
|
||
int offset, int offset_aligned, CORE_ADDR address,
|
||
struct ui_file *stream, int recurse,
|
||
const struct value *original_value,
|
||
const struct value_print_options *options)
|
||
{
|
||
/* For an array of characters, print with string syntax. */
|
||
if (ada_is_string_type (type)
|
||
&& (options->format == 0 || options->format == 's'))
|
||
{
|
||
ada_val_print_string (type, valaddr, offset, offset_aligned,
|
||
address, stream, recurse, original_value,
|
||
options);
|
||
return;
|
||
}
|
||
|
||
fprintf_filtered (stream, "(");
|
||
print_optional_low_bound (stream, type, options);
|
||
if (TYPE_FIELD_BITSIZE (type, 0) > 0)
|
||
val_print_packed_array_elements (type, valaddr, offset_aligned,
|
||
0, stream, recurse,
|
||
original_value, options);
|
||
else
|
||
val_print_array_elements (type, valaddr, offset_aligned, address,
|
||
stream, recurse, original_value,
|
||
options, 0);
|
||
fprintf_filtered (stream, ")");
|
||
}
|
||
|
||
/* Implement Ada val_print'ing for the case where TYPE is
|
||
a TYPE_CODE_REF. */
|
||
|
||
static void
|
||
ada_val_print_ref (struct type *type, const gdb_byte *valaddr,
|
||
int offset, int offset_aligned, CORE_ADDR address,
|
||
struct ui_file *stream, int recurse,
|
||
const struct value *original_value,
|
||
const struct value_print_options *options,
|
||
const struct language_defn *language)
|
||
{
|
||
/* For references, the debugger is expected to print the value as
|
||
an address if DEREF_REF is null. But printing an address in place
|
||
of the object value would be confusing to an Ada programmer.
|
||
So, for Ada values, we print the actual dereferenced value
|
||
regardless. */
|
||
struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
|
||
struct value *deref_val;
|
||
CORE_ADDR deref_val_int;
|
||
|
||
if (TYPE_CODE (elttype) == TYPE_CODE_UNDEF)
|
||
{
|
||
fputs_filtered ("<ref to undefined type>", stream);
|
||
return;
|
||
}
|
||
|
||
deref_val = coerce_ref_if_computed (original_value);
|
||
if (deref_val)
|
||
{
|
||
if (ada_is_tagged_type (value_type (deref_val), 1))
|
||
deref_val = ada_tag_value_at_base_address (deref_val);
|
||
|
||
common_val_print (deref_val, stream, recurse + 1, options,
|
||
language);
|
||
return;
|
||
}
|
||
|
||
deref_val_int = unpack_pointer (type, valaddr + offset_aligned);
|
||
if (deref_val_int == 0)
|
||
{
|
||
fputs_filtered ("(null)", stream);
|
||
return;
|
||
}
|
||
|
||
deref_val
|
||
= ada_value_ind (value_from_pointer (lookup_pointer_type (elttype),
|
||
deref_val_int));
|
||
if (ada_is_tagged_type (value_type (deref_val), 1))
|
||
deref_val = ada_tag_value_at_base_address (deref_val);
|
||
|
||
/* Make sure that the object does not have an unreasonable size
|
||
before trying to print it. This can happen for instance with
|
||
references to dynamic objects whose contents is uninitialized
|
||
(Eg: an array whose bounds are not set yet). */
|
||
ada_ensure_varsize_limit (value_type (deref_val));
|
||
|
||
val_print (value_type (deref_val),
|
||
value_contents_for_printing (deref_val),
|
||
value_embedded_offset (deref_val),
|
||
value_address (deref_val), stream, recurse + 1,
|
||
deref_val, options, language);
|
||
}
|
||
|
||
/* See the comment on ada_val_print. This function differs in that it
|
||
does not catch evaluation errors (leaving that to ada_val_print). */
|
||
|
||
static void
|
||
ada_val_print_1 (struct type *type, const gdb_byte *valaddr,
|
||
int offset, CORE_ADDR address,
|
||
struct ui_file *stream, int recurse,
|
||
const struct value *original_value,
|
||
const struct value_print_options *options,
|
||
const struct language_defn *language)
|
||
{
|
||
int offset_aligned;
|
||
|
||
type = ada_check_typedef (type);
|
||
|
||
if (ada_is_array_descriptor_type (type)
|
||
|| (ada_is_constrained_packed_array_type (type)
|
||
&& TYPE_CODE (type) != TYPE_CODE_PTR))
|
||
{
|
||
ada_val_print_gnat_array (type, valaddr, offset, address,
|
||
stream, recurse, original_value,
|
||
options, language);
|
||
return;
|
||
}
|
||
|
||
offset_aligned = offset + ada_aligned_value_addr (type, valaddr) - valaddr;
|
||
type = printable_val_type (type, valaddr + offset_aligned);
|
||
type = resolve_dynamic_type (type, valaddr + offset_aligned,
|
||
address + offset_aligned);
|
||
|
||
switch (TYPE_CODE (type))
|
||
{
|
||
default:
|
||
val_print (type, valaddr, offset, address, stream, recurse,
|
||
original_value, options, language_def (language_c));
|
||
break;
|
||
|
||
case TYPE_CODE_PTR:
|
||
ada_val_print_ptr (type, valaddr, offset, offset_aligned,
|
||
address, stream, recurse, original_value,
|
||
options, language);
|
||
break;
|
||
|
||
case TYPE_CODE_INT:
|
||
case TYPE_CODE_RANGE:
|
||
ada_val_print_num (type, valaddr, offset, offset_aligned,
|
||
address, stream, recurse, original_value,
|
||
options, language);
|
||
break;
|
||
|
||
case TYPE_CODE_ENUM:
|
||
ada_val_print_enum (type, valaddr, offset, offset_aligned,
|
||
address, stream, recurse, original_value,
|
||
options, language);
|
||
break;
|
||
|
||
case TYPE_CODE_FLT:
|
||
ada_val_print_flt (type, valaddr, offset, offset_aligned,
|
||
address, stream, recurse, original_value,
|
||
options, language);
|
||
break;
|
||
|
||
case TYPE_CODE_UNION:
|
||
case TYPE_CODE_STRUCT:
|
||
ada_val_print_struct_union (type, valaddr, offset, offset_aligned,
|
||
address, stream, recurse,
|
||
original_value, options, language);
|
||
break;
|
||
|
||
case TYPE_CODE_ARRAY:
|
||
ada_val_print_array (type, valaddr, offset, offset_aligned,
|
||
address, stream, recurse, original_value,
|
||
options);
|
||
return;
|
||
|
||
case TYPE_CODE_REF:
|
||
ada_val_print_ref (type, valaddr, offset, offset_aligned,
|
||
address, stream, recurse, original_value,
|
||
options, language);
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* See val_print for a description of the various parameters of this
|
||
function; they are identical. */
|
||
|
||
void
|
||
ada_val_print (struct type *type, const gdb_byte *valaddr,
|
||
int embedded_offset, CORE_ADDR address,
|
||
struct ui_file *stream, int recurse,
|
||
const struct value *val,
|
||
const struct value_print_options *options)
|
||
{
|
||
|
||
/* XXX: this catches QUIT/ctrl-c as well. Isn't that busted? */
|
||
TRY
|
||
{
|
||
ada_val_print_1 (type, valaddr, embedded_offset, address,
|
||
stream, recurse, val, options,
|
||
current_language);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
}
|
||
END_CATCH
|
||
}
|
||
|
||
void
|
||
ada_value_print (struct value *val0, struct ui_file *stream,
|
||
const struct value_print_options *options)
|
||
{
|
||
struct value *val = ada_to_fixed_value (val0);
|
||
CORE_ADDR address = value_address (val);
|
||
struct type *type = ada_check_typedef (value_enclosing_type (val));
|
||
struct value_print_options opts;
|
||
|
||
/* If it is a pointer, indicate what it points to. */
|
||
if (TYPE_CODE (type) == TYPE_CODE_PTR)
|
||
{
|
||
/* Hack: don't print (char *) for char strings. Their
|
||
type is indicated by the quoted string anyway. */
|
||
if (TYPE_LENGTH (TYPE_TARGET_TYPE (type)) != sizeof (char)
|
||
|| TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_INT
|
||
|| TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)))
|
||
{
|
||
fprintf_filtered (stream, "(");
|
||
type_print (type, "", stream, -1);
|
||
fprintf_filtered (stream, ") ");
|
||
}
|
||
}
|
||
else if (ada_is_array_descriptor_type (type))
|
||
{
|
||
/* We do not print the type description unless TYPE is an array
|
||
access type (this is encoded by the compiler as a typedef to
|
||
a fat pointer - hence the check against TYPE_CODE_TYPEDEF). */
|
||
if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
|
||
{
|
||
fprintf_filtered (stream, "(");
|
||
type_print (type, "", stream, -1);
|
||
fprintf_filtered (stream, ") ");
|
||
}
|
||
}
|
||
else if (ada_is_bogus_array_descriptor (type))
|
||
{
|
||
fprintf_filtered (stream, "(");
|
||
type_print (type, "", stream, -1);
|
||
fprintf_filtered (stream, ") (...?)");
|
||
return;
|
||
}
|
||
|
||
opts = *options;
|
||
opts.deref_ref = 1;
|
||
val_print (type, value_contents_for_printing (val),
|
||
value_embedded_offset (val), address,
|
||
stream, 0, val, &opts, current_language);
|
||
}
|