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test_cp.py
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/
test_cp.py
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from disk import *
from yggdrasil.util import *
from yggdrasil.diskspec import *
from yggdrasil import test
class CPSpec(object):
def __init__(self, ds):
self._ds = ds
def cp(self, sparent, sname, dparent, dname):
# sparent/sname exists
assertion(self._ds._direxists(sparent, sname))
# dparent/dname does not exist
assertion(Not(self._ds._direxists(dparent, dname)))
# source inode
sino = self._ds._dirfn(sparent, sname)
assertion(self._ds.is_regular(sino))
# destination inode
dino = self._ds.ialloc(True)
debug('sino', sino)
debug('sino valid?', self._ds.is_valid(sino))
debug('sino-mode', self._ds._attrs.mode(sino))
# Set attributes for new inode
self._ds._attrs.set_bsize(dino, 0)
self._ds._attrs.set_mtime(dino, 0) #self._ds._attrs.mtime(sino))
self._ds._attrs.set_mode(dino, 0) #self._ds._attrs.mode(sino))
#
# # associate parent x name -> ino
self._ds._dirfn = self._ds._dirfn.update((dparent, dname), dino)
self._ds._direxists = self._ds._direxists.update((dparent, dname), BoolVal(True))
# self.write(dino, 0, 0, self._datafn(sino, 0, 0))
return dino
class CPImpl(object):
def __init__(self, di):
self._di = di
def cp(self, sparent, sname, dparent, dname):
# sparent/sname exists
assertion(self._di._direxists(sparent, sname))
# dparent/dname does not exist
assertion(Not(self._di._direxists(dparent, dname)))
sino = self._di.lookup(sparent, sname)
if sino == 0:
return sino
assertion(self._di.is_regular(sino))
sattr = self._di.get_iattr(sino)
dino = self._di.mknod(dparent, dname, 0, 0) #, sattr.mode, sattr.mtime)
if dino < 0:
return dino
fsize = self._di.get_iattr(sino).bsize
if fsize == 0:
return dino
else:
assertion(False)
return dino
# dat = self.read(sino, 0, 0)
#
# b = ConstBlock(0)
# b[0] = dat
# self.write(dino, 0, 0, b)
class CPRefinement(test.RefinementTest):
def _create_dir(self, mach):
dirfn = FreshUFunction('dirfn', InoSort, NameSort, InoSort)
direxists = FreshUFunction('direxists', InoSort, NameSort, BoolSort())
datafn = FreshUFunction('datafn', InoSort, BitVecSort(32), BlockOffsetSort, SizeSort)
ifree = FreshUFunction('ifreefn', InoSort, BoolSort())
attrs = FreshAttributes()
return DirSpec(mach, dirfn, direxists, datafn, ifree, attrs)
def create_spec(self, mach):
dspec = self._create_dir(mach)
return dspec, CPSpec(dspec)
def create_impl(self, mach):
dspec = self._create_dir(mach)
return dspec, CPImpl(dspec)
def test_cp(self):
spec_mach = Machine()
spec, cp_spec = self.create_spec(spec_mach)
impl_mach = Machine()
impl, cp_impl = self.create_impl(impl_mach)
##
ino = FreshIno('ino-pre')
blocknum = FreshBitVec('blocknum-pre', 32)
off = FreshBitVec('off-pre', BlockOffsetSort.size())
pre = ForAll([ino], And(
spec.is_valid(ino) == impl.is_valid(ino),
# General inode properties
Implies(spec.is_valid(ino), And(
spec.get_iattr(ino) == impl.get_iattr(ino))),
# Non-directory properties
Implies(Not(spec.is_dir(ino)), And(
spec.read(ino, blocknum, off) == impl.read(ino, blocknum, off),
)),
# Directory properties
Implies(spec.is_dir(ino), And(
# spec.lookup(ino, name) == impl.lookup(ino, name))),
))
))
self.show(And(*assertion.assertions), pre)
########################
sparent0 = FreshIno('sparent0')
sname0 = FreshName('sname0')
dparent0 = FreshIno('dparent0')
dname0 = FreshName('dname0')
sino = cp_spec.cp(sparent0, sname0, dparent0, dname0)
iino = cp_impl.cp(sparent0, sname0, dparent0, dname0)
assertion(sino == iino)
#########################
ino = FreshIno('ino-post')
post = ForAll([ino], And(
spec.is_valid(ino) == impl.is_valid(ino),
# General inode properties
Implies(spec.is_valid(ino), And(
spec.get_iattr(ino) == impl.get_iattr(ino))),
Implies(Not(spec.is_dir(ino)), And(
spec.read(ino, blocknum, off) == impl.read(ino, blocknum, off),
)),
# Directory properties
Implies(spec.is_dir(ino), And(
# spec.lookup(ino, name) == impl.lookup(ino, name)
))
))
self.psolve(Not(Implies(pre, post)))
if __name__ == '__main__':
test.main()