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Fix/timeout #109

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Fix/timeout #109

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c193b20
resend alarm signal if we happen to be running __del__
Kyle-Kyle May 10, 2024
d8f6144
linting
Kyle-Kyle May 10, 2024
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7 changes: 6 additions & 1 deletion angrop/rop_chain.py
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Original file line number Diff line number Diff line change
Expand Up @@ -137,7 +137,12 @@ def _concretize_chain_values(self, constraints=None, timeout=None, preserve_next
concretize chain values with a timeout
"""
if self.next_pc_idx() is not None:
return (self + self._rop.chain_builder.shift(self._p.arch.bytes))._concretize_chain_values(constraints=constraints, timeout=timeout, preserve_next_pc=preserve_next_pc)
# make sure we don't leave a dangling `next_pc` value in the chain
# which may corrupt chain concatenation at byte-level
full_chain = self + self._rop.chain_builder.shift(self._p.arch.bytes)
return full_chain._concretize_chain_values( constraints=constraints,
timeout=timeout,
preserve_next_pc=preserve_next_pc)
if timeout is None:
timeout = self._timeout
values = rop_utils.timeout(timeout)(self.__concretize_chain_values)(constraints=constraints)
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8 changes: 8 additions & 0 deletions angrop/rop_utils.py
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Expand Up @@ -312,6 +312,14 @@ def step_to_unconstrained_successor(project, state, max_steps=2, allow_simproced
def timeout(seconds_before_timeout):
def decorate(f):
def handler(signum, frame):# pylint:disable=unused-argument
# Exception during __del__ will be ignore
# so if we happen to hit a __del__, retry the alarm
# reference: https://docs.python.org/3/reference/datamodel.html#object.__del__
while frame.f_back:
if frame.f_code.co_name == '__del__':
signal.setitimer(signal.ITIMER_REAL, 0.1, 0)
return
frame = frame.f_back
print("[angrop] Timeout")
raise RopException("[angrop] Timeout!")
def new_f(*args, **kwargs):
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