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# Copyright (C) 2023-2024 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 os
from enum import Enum
import gdb
from gdb.missing_debug import MissingDebugHandler
# A global log that is filled in by instances of the LOG_HANDLER class
# when they are called.
handler_call_log = []
class Mode(Enum):
RETURN_NONE = 0
RETURN_TRUE = 1
RETURN_FALSE = 2
RETURN_STRING = 3
class handler(MissingDebugHandler):
def __init__(self):
super().__init__("handler")
self._call_count = 0
self._mode = Mode.RETURN_NONE
def __call__(self, objfile):
global handler_call_log
handler_call_log.append(self.name)
self._call_count += 1
if self._mode == Mode.RETURN_NONE:
return None
if self._mode == Mode.RETURN_TRUE:
os.rename(self._src, self._dest)
return True
if self._mode == Mode.RETURN_FALSE:
return False
if self._mode == Mode.RETURN_STRING:
return self._dest
assert False
@property
def call_count(self):
"""Return a count, the number of calls to __call__ since the last
call to set_mode.
"""
return self._call_count
def set_mode(self, mode, *args):
self._call_count = 0
self._mode = mode
if mode == Mode.RETURN_NONE:
assert len(args) == 0
return
if mode == Mode.RETURN_TRUE:
assert len(args) == 2
self._src = args[0]
self._dest = args[1]
return
if mode == Mode.RETURN_FALSE:
assert len(args) == 0
return
if mode == Mode.RETURN_STRING:
assert len(args) == 1
self._dest = args[0]
return
assert False
class exception_handler(MissingDebugHandler):
def __init__(self):
super().__init__("exception_handler")
self.exception_type = None
def __call__(self, objfile):
global handler_call_log
handler_call_log.append(self.name)
assert self.exception_type is not None
raise self.exception_type("message")
class log_handler(MissingDebugHandler):
def __call__(self, objfile):
global handler_call_log
handler_call_log.append(self.name)
return None
# A basic helper function, this keeps lines shorter in the TCL script.
def register(name, locus=None):
gdb.missing_debug.register_handler(locus, log_handler(name))
# Create instances of the handlers, but don't install any. We install
# these as needed from the TCL script.
rhandler = exception_handler()
handler_obj = handler()
print("Success")
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