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# RTEMS Tools Project (http://www.rtems.org/)
# Copyright 2010-2015 Chris Johns (chrisj@rtems.org)
# All rights reserved.
#
# This file is part of the RTEMS Tools package in 'rtems-tools'.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
#
# RTEMS Mutex Support
#
import gdb
import objects
import percpu
import threads
class attributes:
CORE_MUTEX_NESTING_ACQUIRES = 0
CORE_MUTEX_NESTING_IS_ERROR = 1
CORE_MUTEX_NESTING_BLOCKS = 2
CORE_MUTEX_DISCIPLINES_FIFO = 0
CORE_MUTEX_DISCIPLINES_PRIORITY = 1
CORE_MUTEX_DISCIPLINES_PRIORITY_INHERIT = 2
CORE_MUTEX_DISCIPLINES_PRIORITY_CEILING = 3
def __init__(self, attr):
self.attr = attr
def lock_nesting_behaviour(self):
return self.attr['lock_nesting_behaviour']
def only_owner_release(self):
return self.attr['only_owner_release']
def discipline(self):
return self.attr['discipline']
def priority_ceiling(self):
return self.attr['priority_ceiling']
def brief(self):
s = ''
if self.lock_nesting_behaviour() == CORE_MUTEX_NESTING_ACQUIRES:
s += 'lck-nest-acquire'
elif self.lock_nesting_behaviour() == CORE_MUTEX_NESTING_IS_ERROR:
s += 'lck-nest-acquire'
elif self.lock_nesting_behaviour() == CORE_MUTEX_NESTING_BLOCKS:
s += 'lck-nest-blocks'
else:
s += 'lck-nest-bad'
if self.only_owner_release():
s += ',owner-release'
else:
s += ',any-release'
if self.discipline() == CORE_MUTEX_DISCIPLINES_FIFO:
s += ',fifo'
elif self.discipline() == CORE_MUTEX_DISCIPLINES_PRIORITY:
s += ',pri'
elif self.discipline() == CORE_MUTEX_DISCIPLINES_INHERIT:
s += ',inherit'
elif self.discipline() == CORE_MUTEX_DISCIPLINES_PRIORITY_CEILING:
s += ',pri-celling'
else:
s += ',dis-bad'
return s
class control():
'''
CORE_mutex_Control has the following fields:
Wait_queue Thread_queue_Control
Attributes CORE_mutex_attributes
nest_count uint32_t
*holder Thread_control
queue CORE_mutex_order_list X
where 'X' means the field is condition and may no exist.
'''
def __init__(self, ctrl):
if ctrl.type.code == gdb.TYPE_CODE_PTR:
self.reference = ctrl
self.ctrl = ctrl.dereference()
else:
self.ctrl = ctrl
self.reference = ctrl.address
self.attr = attributes(ctrl['Attributes'])
def wait_queue(self):
return threads.queue(self.ctrl['Wait_queue'])
def attributes(self):
return self.attr
def nest_count(self):
return self.ctrl['nest_count']
def holder(self):
h = self.ctrl['holder']
if h:
return threads.control(h)
return None
def brief(self):
return "nests:%d, %s" % (self.ctrl['nest_count'], self.attr.brief())
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