class Function(object):

"""

The function object of the given Wasm module

"""

def __init__(self, start_offset, start_instr=None,

name='func_default_name', prefered_name=None):

"""

The properties of the functions of the given Wasm module

Properties:

start_offset: the start offset of the first instruction

start_instr: the first instruction of the function

name: the function's name, represented in '$funcX' or readable name (TODO will make them all to readable name in the future)

prefered_name: the signature of the function, including type of arguments and return value

size: the size of the function, the sum of all its composed instructions

end_offset: the end_offset of its last basic block

end_instr: the last instruction of the function

basicblocks: the list of all composed basic blocks

instructions: the list of all composed instructions

"""

self.start_offset = start_offset

self.start_instr = start_instr

self.name = name

self.prefered_name = prefered_name if prefered_name else name

self.size = 0

self.end_offset = None

self.end_instr = None

self.basicblocks = list()

self.instructions = list()

def __str__(self):

line = ('%x' % self.start_offset) + ': ' + str(self.name) + '\n'

line += 'prefered_name: %s\n' % self.prefered_name

line += 'start_offset = %x\n' % self.start_offset

line += 'start_instr = ' + str(self.start_instr.name) + '\n'

if self.size:

line += 'size = ' + str(self.size) + '\n'

if self.end_offset:

line += 'end_offset = ' + str(self.end_offset) + '\n'

if self.end_instr:

line += 'end_instr = ' + str(self.end_instr.name) + '\n'

line += 'lenght basicblocks: %s\n' % len(self.basicblocks)

line += 'lenght instructions: %s\n' % len(self.instructions)

line += '\n\n'

return line