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85 lines
2.7 KiB
Python
85 lines
2.7 KiB
Python
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# File: HandleRegistry.py
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# Author: Carl Allendorph
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# Date: 06NOV2014
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#
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# Description:
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# THis file contains the implementation of a class for accessing the
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# handle registry. This contains a mapping of queue handles to
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# strings for labeling purposes.
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import gdb
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from .Types import StdTypes
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from .QueueTools import *
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class HandleRegistry:
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"""The FreeRTOS system can be configured with a table that
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associates a name with a QueueHandle_t.
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This class can be used to access this table and
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label queue/mutex/semaphore/event groups
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"""
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def __init__(self, regSymbol="xQueueRegistry"):
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symbol, methodObj = gdb.lookup_symbol(regSymbol)
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self._registry = symbol.value()
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self._minIndex = 0
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self._maxIndex = 0
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self._minIndex, self._maxIndex = self._registry.type.range()
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def GetName(self, handle):
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"""Find the string name associated with a queue
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handle if it exists in the registry
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"""
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for i in range(self._minIndex, self._maxIndex):
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elem = self._registry[i]
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h = elem["xHandle"]
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val = h.cast(StdTypes.uint32_t)
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if handle == val:
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print("Found Entry for: %x" % handle)
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name = elem["pcQueueName"].string()
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return name
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def PrintRegistry(self):
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for i in range(self._minIndex, self._maxIndex):
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elem = self._registry[i]
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h = elem["xHandle"]
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if h != 0:
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name = elem["pcQueueName"].string()
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print("%d: %3s %16s" % (i, h, name))
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def FilterBy(self, qMode):
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"""Retrieve a List of Mutex Queue Handles"""
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resp = []
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for i in range(self._minIndex, self._maxIndex):
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elem = self._registry[i]
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h = elem["xHandle"]
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if h != 0:
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name = elem["pcQueueName"].string()
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q = QueueInspector(h)
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q.SetName(name)
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if qMode != None:
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qType = q.GetQueueType()
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if qType != None:
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if qType == qMode:
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resp.append(q)
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else:
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print("qType == None")
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else:
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resp.append(q)
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return resp
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def GetMutexes(self):
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"""Retrieve all the Mutex Objects in the Handle Registry"""
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return self.FilterBy(QueueMode.MUTEX)
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def GetSemaphores(self):
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"""Retrieve all the Semaphore Objects in the Handle Registry"""
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return self.FilterBy(QueueMode.BINARY)
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def GetQueues(self):
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"""Retrieve all the Queue Objects in the Handle Registry"""
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return self.FilterBy(QueueMode.QUEUE)
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