7737b13364
A user found that gdb would not correctly print a field from an Ada
record using the scalar storage order feature. We tracked this down
to a combination of problems.
First, GCC did not emit DW_AT_endianity on the enumeration type.
DWARF does not specify this, but it is an obvious and harmless
extension. This was fixed in GCC recently:
https://gcc.gnu.org/pipermail/gcc-patches/2024-January/642347.html
https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=5d8b60effc7268448a94fbbbad923ab6871252cd
Second, GDB did not handle this attribute on enumeration types. This
patch makes this change and adds a test case that will pass with the
patched GCC.
So far, the GCC patch isn't on the gcc-13 branch; but if it ever goes
in, the test case in this patch can be updated to reflect that.
Reviewed-By: Keith Seitz <keiths@redhat.com>
55 lines
1.7 KiB
Ada
55 lines
1.7 KiB
Ada
-- Copyright 2019-2024 Free Software Foundation, Inc.
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--
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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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--
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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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--
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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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with Pck; use Pck;
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with System.Storage_Elements; use System.Storage_Elements;
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procedure Storage is
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subtype Some_Range is Natural range 0..127;
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subtype Another_Range is Natural range 0..15;
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type Colors is (Red, Green, Blue);
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for Colors use (Red => 0, Green => 1, Blue => 2);
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type Rec is record
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Value : Some_Range;
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Another_Value : Another_Range;
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Color : Colors;
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end record;
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for Rec use record
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Value at 0 range 0..6;
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Another_Value at 0 range 7..10;
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Color at 0 range 11..13;
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end record;
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type Rec_LE is new Rec;
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for Rec_LE'Bit_Order use System.Low_Order_First;
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for Rec_LE'Scalar_Storage_Order use System.Low_Order_First;
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type Rec_BE is new Rec;
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for Rec_BE'Bit_Order use System.High_Order_First;
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for Rec_BE'Scalar_Storage_Order use System.High_Order_First;
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V_LE : Rec_LE;
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V_BE : Rec_BE;
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begin
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V_LE := (126, 12, Green);
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V_BE := (126, 12, Green);
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Do_Nothing (V_LE'Address); -- START
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Do_Nothing (V_BE'Address);
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end Storage;
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