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a625a8c9eb
A recent version of GCC changed how fixed-point types are described.
For example, a denominator in one test case now looks like:
GNU_denominator (exprloc)
[ 0] implicit_value: 16 byte block: 00 00 b8 9d 0d 69 55 a0 01 00 00 00 00 00 00 00
... the difference being that this now uses exprloc and emits a
DW_OP_implicit_value for the 16-byte block. (DWARF 5 still uses
DW_FORM_data16.)
This change was made here:
https://gcc.gnu.org/pipermail/gcc-patches/2020-December/560897.html
This patch updates gdb to handle this situation.
Note that, before GCC 11, this test would not give the same answer.
Earlier versions of GCC fell back to GNAT encodings for this case.
gdb/ChangeLog
2021-01-25 Tom Tromey <tromey@adacore.com>
* dwarf2/read.c (get_mpz): New function.
(get_dwarf2_rational_constant): Use it.
gdb/testsuite/ChangeLog
2021-01-25 Tom Tromey <tromey@adacore.com>
* gdb.ada/fixed_points.exp: Add regression test.
* gdb.ada/fixed_points/fixed_points.adb (FP5_Var): New variable.
* gdb.ada/fixed_points/pck.adb (Delta5, FP5_Type): New.
71 lines
2.1 KiB
Ada
71 lines
2.1 KiB
Ada
-- Copyright 2004-2021 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 System;
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with Pck; use Pck;
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procedure Fixed_Points is
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------------
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-- Test 1 --
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------------
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-- Fixed point subtypes
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type Base_Fixed_Point_Type is
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delta 1.0 / 16.0
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range -2147483648 * 1.0 / 16.0 .. 2147483647 * 1.0 / 16.0;
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subtype Fixed_Point_Subtype is
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Base_Fixed_Point_Type range -50.0 .. 50.0;
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type New_Fixed_Point_Type is
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new Base_Fixed_Point_Type range -50.0 .. 50.0;
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Base_Object : Base_Fixed_Point_Type := -50.0;
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Subtype_Object : Fixed_Point_Subtype := -50.0;
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New_Type_Object : New_Fixed_Point_Type := -50.0;
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------------
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-- Test 2 --
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------------
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-- Overprecise delta
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Overprecise_Delta : constant := 0.135791357913579;
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-- delta whose significant figures cannot be stored into a long.
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type Overprecise_Fixed_Point is
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delta Overprecise_Delta range 0.0 .. 200.0;
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for Overprecise_Fixed_Point'Small use Overprecise_Delta;
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Overprecise_Object : Overprecise_Fixed_Point :=
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Overprecise_Fixed_Point'Small;
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FP5_Var : FP5_Type := 3 * Delta5;
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begin
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Base_Object := 1.0/16.0; -- Set breakpoint here
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Subtype_Object := 1.0/16.0;
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New_Type_Object := 1.0/16.0;
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Overprecise_Object := Overprecise_Fixed_Point'Small * 2;
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Do_Nothing (FP1_Var'Address);
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Do_Nothing (FP2_Var'Address);
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Do_Nothing (FP3_Var'Address);
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Do_Nothing (FP4_Var'Address);
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Do_Nothing (FP5_Var'Address);
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end Fixed_Points;
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