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Semantically equivalent spec separation for Fulm optimisation #5

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Semantically equivalent spec separation for Fulm optimisation #5

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9ed0e3e
separate ownership from logical assertion for ByteV and usages
rbanerjee20 Mar 18, 2026
25402a5
fix up spec so it still runs as expected
rbanerjee20 Mar 18, 2026
c8ae7a7
Replace calls to NewByteV with RW
rbanerjee20 Mar 22, 2026
20f72a7
Change call to Byte to Block primitive
rbanerjee20 Mar 24, 2026
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17 changes: 14 additions & 3 deletions defs.h
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Original file line number Diff line number Diff line change
Expand Up @@ -298,6 +298,13 @@ predicate void ByteV (pointer virt, u8 the_value)
return;
}

// predicate (u8) NewByteV (pointer virt)
// {
// take B = Owned<char>(virt);
// // assert (B == the_value);
// return B;
// }

predicate void Page (pointer vbase, boolean guard, u8 order)
{
if (!guard) {
Expand All @@ -308,7 +315,7 @@ predicate void Page (pointer vbase, boolean guard, u8 order)
let vbaseI = (u64) vbase;
// FULM_OPT
take Bytes = each (u64 i; (vbaseI <= i) && (i < (vbaseI + length)))
{Byte(array_shift<char>(NULL, i))};
{Block(array_shift<char>(NULL, i))};
return;
}
}
Expand All @@ -323,7 +330,9 @@ predicate void ZeroPage (pointer vbase, boolean guard, u8 order)
let vbaseI = ((u64) vbase);
// FULM_OPT
take Bytes = each (u64 i; (vbaseI <= i) && (i < (vbaseI + length)))
{ByteV(array_shift<char>(NULL, i), 0u8)};
{RW(array_shift<char>(NULL, i))};
assert (each (u64 i; (vbaseI <= i) && (i < (vbaseI + length)))
{Bytes[i] == 0u8});
return;
}
}
Expand All @@ -335,7 +344,9 @@ predicate void AllocatorPageZeroPart (pointer zero_start, u8 order)
let length = region_length - sizeof<struct list_head>;
// FULM_OPT
take Bytes = each (u64 i; (start <= i) && (i < (start + length)))
{ByteV(array_shift<char>(NULL, i), 0u8)};
{RW(array_shift<char>(NULL, i))};
assert (each (u64 i; (start <= i) && (i < (start + length)))
{Bytes[i] == 0u8});
return;
}

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5 changes: 4 additions & 1 deletion run.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -10,5 +10,8 @@ $CC -g -c -O0 -std=gnu11 -I$OPAM_SWITCH_PREFIX/lib/cn/runtime/include build/driv
echo "Linking..."
$CC driver.pp.exec.o $OPAM_SWITCH_PREFIX/lib/cn/runtime/libcn_exec.a -L $OPAM_SWITCH_PREFIX/lib/cn/runtime -lcn_exec -o driver.exe
echo "Running..."
./driver.exe
for i in $(seq 1 10);
do
gtime -f ~%e~%M ./driver.exe
done
echo "Done!"