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from arch.arch import Arch
class ProgramState():
"""A snapshot of the program's state."""
def __init__(self, arch: Arch):
self.arch = arch
dict_t = dict[str, int]
self.regs = dict_t({ reg: None for reg in arch.regnames })
self.has_backwards = False
self.matched = False
def set_backwards(self):
self.has_backwards = True
def set(self, reg: str, value: int):
"""Assign a value to a register.
:raises RuntimeError: if the register already has a value.
"""
assert(reg in self.arch.regnames)
if self.regs[reg] != None:
raise RuntimeError("Reassigning register")
self.regs[reg] = value
def as_repr(self, reg: str):
"""Get a representational string of a register's value."""
assert(reg in self.arch.regnames)
value = self.regs[reg]
if value is not None:
return hex(value)
else:
return "<none>"
def __repr__(self):
return self.regs.__repr__()
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