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101 lines
3.3 KiB
Python
101 lines
3.3 KiB
Python
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# File: List.py
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# Author: Carl Allendorph
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# Date: 05NOV2014
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#
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# Description:
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# This file contains the class for inspecting
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# a FreeRTOS List Object
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#
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import gdb
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from .Types import StdTypes
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class ListInspector:
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"""FreeRTOS List Inspector Object"""
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ListType = gdb.lookup_type("List_t")
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def __init__(self, handle):
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self._list = None
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# print("List: Handle: %s" % handle)
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self.Assign(handle)
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def Assign(self, listObj):
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try:
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if listObj.type == ListInspector.ListType:
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self._list = listObj
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return
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else:
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raise TypeError("Invalid List Object Type!")
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except Exception as exc:
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# print(" Failed to assign from List object: %s" % str(exc))
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pass
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symbol, methodObj = gdb.lookup_symbol(listObj)
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if symbol != None:
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self._list = symbol.value()
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else:
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addrInt = int(listObj, 0)
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listObjPtr = gdb.Value(addrInt).cast(ListInspector.ListType.pointer())
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self._list = listObjPtr.dereference()
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def GetElements(self, CastTypeStr=None, startElem=1):
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"""Get the Elements of the list as an array of
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gdb.Value type objects.
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@param CastTypeStr string name of the type of object that
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we will cast the void *pvOwner elements of the list to.
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User can also pass a L{gdb.Type} object as the type
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If None, we will simply cast to uint32_t and print these
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as hex values.
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@param startElem This is a flag to indicate whether
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we will start getting elements starting at 0 or 1. Note
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that this is to deal with some non-consistent behavior
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of some of the TCB Task lists.
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"""
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if self._list != None:
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CastType = None
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if CastTypeStr != None:
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if type(CastTypeStr) == str:
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try:
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CastType = gdb.lookup_type(CastTypeStr).pointer()
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except:
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print("Failed to find type: %s" % CastTypeStr)
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elif type(CastTypeStr) == gdb.Type:
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CastType = CastTypeStr.pointer()
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resp = []
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numElems = self._list["uxNumberOfItems"]
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# print("List Elements: %d" % numElems)
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index = self._list["pxIndex"]
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if numElems > 0 and numElems < 200:
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if startElem == 0:
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curr = index
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else:
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curr = index["pxPrevious"]
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for i in range(0, numElems):
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owner = curr["pvOwner"]
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ownerObj = None
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if CastType != None:
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castObjPtr = owner.cast(CastType)
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castObj = castObjPtr.dereference()
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ownerObj = castObj
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else:
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ownerUInt = owner.cast(StdTypes.uint32_t)
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ownerObj = ownerUInt
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itemVal = curr["xItemValue"]
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resp.append((ownerObj, itemVal.cast(StdTypes.uint32_t)))
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curr = curr["pxPrevious"]
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return resp
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else:
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raise ValueError("Invalid List Object - Possibly Failed to Initialize!")
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