def _solver(self):
"""
Creates or gets a Claripy solver, based on the state options.
"""
if self._stored_solver is not None:
return self._stored_solver
track = o.CONSTRAINT_TRACKING_IN_SOLVER in self.state.options
approximate_first = o.APPROXIMATE_FIRST in self.state.options
if o.STRINGS_ANALYSIS in self.state.options:
if 'smtlib_cvc4' in backend_manager.backends._backends_by_name:
our_backend = backend_manager.backends.smtlib_cvc4
elif 'smtlib_z3' in backend_manager.backends._backends_by_name:
our_backend = backend_manager.backends.smtlib_z3
elif 'smtlib_abc' in backend_manager.backends._backends_by_name:
our_backend = backend_manager.backends.smtlib_abc
else:
raise ValueError("Could not find suitable string solver!")
if o.COMPOSITE_SOLVER in self.state.options:
self._stored_solver = claripy.SolverComposite(
template_solver_string=claripy.SolverCompositeChild(backend=our_backend, track=track)
)
elif o.ABSTRACT_SOLVER in self.state.options:
self._stored_solver = claripy.SolverVSA()
elif o.SYMBOLIC in self.state.options and o.REPLACEMENT_SOLVER in self.state.options:
self._stored_solver = claripy.SolverReplacement(auto_replace=False)
elif o.SYMBOLIC in self.state.options and o.CACHELESS_SOLVER in self.state.options:
self._stored_solver = claripy.SolverCacheless(track=track)
elif o.SYMBOLIC in self.state.options and o.COMPOSITE_SOLVER in self.state.options:
self._stored_solver = claripy.SolverComposite(track=track)
elif o.SYMBOLIC in self.state.options and any(opt in self.state.options for opt in o.approximation):
self._stored_solver = claripy.SolverHybrid(track=track, approximate_first=approximate_first)
elif o.HYBRID_SOLVER in self.state.options:
self._stored_solver = claripy.SolverHybrid(track=track, approximate_first=approximate_first)
elif o.SYMBOLIC in self.state.options:
self._stored_solver = claripy.Solver(track=track)
else:
self._stored_solver = claripy.SolverConcrete()
return self._stored_solver
def _solver(self):
if self._stored_solver is not None:
return self._stored_solver
track = o.CONSTRAINT_TRACKING_IN_SOLVER in self.state.options
if o.ABSTRACT_SOLVER in self.state.options:
self._stored_solver = claripy.SolverVSA()
elif o.REPLACEMENT_SOLVER in self.state.options:
self._stored_solver = claripy.SolverReplacement(auto_replace=False)
elif o.CACHELESS_SOLVER in self.state.options:
self._stored_solver = claripy.SolverCacheless(track=track)
elif o.COMPOSITE_SOLVER in self.state.options:
self._stored_solver = claripy.SolverComposite(track=track)
elif o.SYMBOLIC in self.state.options and o.approximation & self.state.options:
self._stored_solver = claripy.SolverHybrid(track=track)
elif o.SYMBOLIC in self.state.options:
self._stored_solver = claripy.Solver(track=track)
else:
self._stored_solver = claripy.SolverConcrete()
return self._stored_solver
