越权访问被拦下来
运行下面这段程序,填写它打印出来的结果。
PAGE = 16
PT = {0: (3, "r"), 1: (0, "rw")}
def check(va, want):
vp = va // PAGE
if vp not in PT:
return "缺页"
pp, perm = PT[vp]
if want not in perm:
return "拒绝"
return str(pp * PAGE + va % PAGE)
print(check(5, "r") + "/" + check(5, "w") + "/" + check(20, "w"))
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