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89 lines
2.5 KiB
Python
89 lines
2.5 KiB
Python
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#<pycode(py_gdl)>
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# -----------------------------------------------------------------------
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class BasicBlock(object):
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"""Basic block class. It is returned by the Flowchart class"""
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def __init__(self, id, bb, fc):
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self._fc = fc
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self.id = id
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"""Basic block ID"""
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self.startEA = bb.startEA
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"""startEA of basic block"""
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self.endEA = bb.endEA
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"""endEA of basic block"""
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self.type = self._fc._q.calc_block_type(self.id)
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"""Block type (check fc_block_type_t enum)"""
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def preds(self):
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"""
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Iterates the predecessors list
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"""
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q = self._fc._q
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for i in xrange(0, self._fc._q.npred(self.id)):
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yield self._fc[q.pred(self.id, i)]
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def succs(self):
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"""
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Iterates the successors list
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"""
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q = self._fc._q
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for i in xrange(0, q.nsucc(self.id)):
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yield self._fc[q.succ(self.id, i)]
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# -----------------------------------------------------------------------
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class FlowChart(object):
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"""
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Flowchart class used to determine basic blocks.
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Check ex_gdl_qflow_chart.py for sample usage.
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"""
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def __init__(self, f=None, bounds=None, flags=0):
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"""
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Constructor
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@param f: A func_t type, use get_func(ea) to get a reference
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@param bounds: A tuple of the form (start, end). Used if "f" is None
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@param flags: one of the FC_xxxx flags. One interesting flag is FC_PREDS
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"""
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if (f is None) and (bounds is None or type(bounds) != types.TupleType):
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raise Exception("Please specifiy either a function or start/end pair")
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if bounds is None:
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bounds = (BADADDR, BADADDR)
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# Create the flowchart
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self._q = qflow_chart_t("", f, bounds[0], bounds[1], flags)
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size = property(lambda self: self._q.size())
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"""Number of blocks in the flow chart"""
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def refresh():
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"""Refreshes the flow chart"""
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self._q.refresh()
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def _getitem(self, index):
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return BasicBlock(index, self._q[index], self)
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def __iter__(self):
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return (self._getitem(index) for index in xrange(0, self.size))
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def __getitem__(self, index):
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"""
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Returns a basic block
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@return: BasicBlock
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"""
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if index >= self.size:
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raise KeyError
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else:
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return self._getitem(index)
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#</pycode(py_gdl)>
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