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Dir : ~/usr/share/gdb/python/gdb/printer/

Edit File: bound_registers.py

# Pretty-printers for bounds registers.
# Copyright (C) 2013-2022 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import sys

import gdb.printing

if sys.version_info[0] > 2:
    # Python 3 removed basestring and long
    basestring = str
    long = int

class MpxBound128Printer:
    """Adds size field to a mpx __gdb_builtin_type_bound128 type."""

def __init__(self, val):
        self.val = val

def to_string(self):
        upper = self.val["ubound"]
        lower = self.val["lbound"]
        size = (long)((upper) - (lower))
        if size > -1:
            size = size + 1
        result = "{lbound = %s, ubound = %s} : size %s" % (lower, upper, size)
        return result

gdb.printing.add_builtin_pretty_printer(
    "mpx_bound128", "^builtin_type_bound128", MpxBound128Printer
)