def run(self):
for inst in self._iter_inst():
fname = "op_%s" % inst.opname
fn = getattr(self, fname, None)
if fn is not None:
fn(inst)
elif inst.is_jump:
# this catches e.g. try... except
l = Loc(self.bytecode.func_id.filename, inst.lineno)
if inst.opname in {"SETUP_EXCEPT", "SETUP_FINALLY"}:
msg = "'try' block not supported until python3.7 or later"
else:
msg = "Use of unsupported opcode (%s) found" % inst.opname
raise UnsupportedError(msg, loc=l)
else:
# Non-jump instructions are ignored
pass # intentionally
# Close all blocks
for cur, nxt in zip(self.blockseq, self.blockseq[1:]):
blk = self.blocks[cur]
if not blk.outgoing_jumps and not blk.terminating:
blk.outgoing_jumps[nxt] = 0
graph = CFGraph()
for b in self.blocks:
graph.add_node(b)
for b in self.blocks.values():
for out, pops in b.outgoing_jumps.items():
graph.add_edge(b.offset, out, pops)
graph.set_entry_point(min(self.blocks))
graph.process()
self.graph = graph
# Fill incoming
for b in self.blocks.values():
for out, pops in b.outgoing_jumps.items():
self.blocks[out].incoming_jumps[b.offset] = pops
# Find liveblocks
self.liveblocks = dict((i, self.blocks[i]) for i in self.graph.nodes())
for lastblk in reversed(self.blockseq):
if lastblk in self.liveblocks:
break
else:
raise AssertionError("No live block that exits!?")
# Find backbone
backbone = self.graph.backbone()
# Filter out in loop blocks (Assuming no other cyclic control blocks)
# This is to unavoid variable defined in loops to be considered as
# function scope.
inloopblocks = set()
for b in self.blocks.keys():
if self.graph.in_loops(b):
inloopblocks.add(b)
self.backbone = backbone - inloopblocks
def handle_unknown_opcode(self, info, inst):
raise UnsupportedError("Use of unknown opcode '{}'".format(
inst.opname),
loc=Loc(filename=self.bytecode.func_id.filename,
line=inst.lineno))
def get_debug_loc(self, lineno):
return Loc(self.debug_filename, lineno)
