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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _func_addrs_from_prologues(self):
 """ Scan the entire program image for function prologues, and start code scanning at those positions :return: A list of possible function addresses """


        # Pre-compile all regexes
        regexes = list()
        for ins_regex in self.project.arch.function_prologs:
            r = re.compile(ins_regex)
            regexes.append(r)
        # EDG says: I challenge anyone bothering to read this to come up with a better
        # way to handle CPU modes that affect instruction decoding.
        # Since the only one we care about is ARM/Thumb right now
        # we have this gross hack. Sorry about that.
        thumb_regexes = list()
        if hasattr(self.project.arch, 'thumb_prologs'):
            for ins_regex in self.project.arch.thumb_prologs:
                # Thumb prologues are found at even addrs, but their actual addr is odd!
                # Isn't that great?
                r = re.compile(ins_regex)
                thumb_regexes.append(r)

        # Construct the binary blob first
        unassured_functions = [ ]

        for start_, bytes_ in self._binary.memory.backers():
            for regex in regexes:
                # Match them!
                for mo in regex.finditer(bytes_):
                    position = mo.start() + start_
                    if position % self.project.arch.instruction_alignment == 0:
                        mapped_position = AT.from_rva(position, self._binary).to_mva()
                        if self._addr_in_exec_memory_regions(mapped_position):
                            unassured_functions.append(mapped_position)
            # HACK part 2: Yes, i really have to do this
            for regex in thumb_regexes:
                # Match them!
                for mo in regex.finditer(bytes_):
                    position = mo.start() + start_
                    if position % self.project.arch.instruction_alignment == 0:
                        mapped_position = AT.from_rva(position, self._binary).to_mva()
                        if self._addr_in_exec_memory_regions(mapped_position):
                            unassured_functions.append(mapped_position+1)

        l.info("Found %d functions with prologue scanning.", len(unassured_functions))
        return unassured_functions