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