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SSNI.v
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SSNI.v
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Require Import Coq.Strings.String.
Require Import Arith.EqNat.
Require Import ZArith.
From QuickChick Require Import QuickChick.
Require Import TestingCommon.
Require Import Printing.
Require Import Shrinking.
Require Import Generation.
Open Scope string_scope.
Require Import Reachability.
Definition is_low_state st lab := isLow (pc_lab (st_pc st)) lab.
Definition propSSNI_helper (t : table) (v : Variation) : Checker :=
let '(Var lab st1 st2) := v in
(* Checker.trace (Show.show lab ++ Show.nl ++
showStatePair lab frameMap1 frameMap2 st1 st2) *)
collect (option_bind opcode_of_instr
(instr_lookup (st_imem st1) (st_pc st1)))
(* collect (show lab) *)
(if indist lab st1 st2 then
(* XXX Our generator should always give us this by design.
If that's not the case the generator is broken. *)
match fstep t st1 with
| Some st1' =>
if is_low_state st1 lab then
match fstep t st2 with
| Some st2' =>
collect "LOW -> *" (
(*
whenFail
("LOW -> *" ++ nl ++
(show_execution lab [st1; st1'] [st2; st2']))
*)
(indist lab st1' st2')(*:Gen QProp*))
| _ => (* 1 took a low step and 2 failed *)
collect "Second failed" (checker true)
(*
((Checker.trace (show_pair lab st1 st1'))
(checker false))
*)
(* XXX This used to fail the checker in ICFP paper.
But here it does happen for Alloc, Store and BRet *)
end
else (* is_high st1 *)
if is_low_state st1' lab then
match fstep t st2 with
| Some st2' =>
if is_low_state st2' lab then
collect "HIGH -> LOW" (
(*
whenFail ("HIGH -> LOW" ++ Show.nl ++
(show_execution lab [st1; st1'] [st2; st2']))
*)
(indist lab st1' st2') (* : Gen QProp *)
)
else collect "Second not low" (checker true)
(* This can happen; it's just a discard *)
(* TODO: could check that st2' `indist` st1 *)
| _ => collect "Second failed H" (checker true)
(* This can happen; it's just a discard *)
end
else
collect "HIGH -> HIGH" (
(*
whenFail ("HIGH -> HIGH" ++ Show.nl ++
(show_pair lab st1 st1'))
*)
(indist lab st1 st1')
(*: Gen QProp*))
| _ => collect "Failed" (checker true)
(* This can happen; it's just a discard *)
(* TODO: could check if st2 does a H -> H step *)
end
else collect "Not indist!" (checker true)).
(* XXX this should never happen with a correct generator;
and prop_generate_indist already tests this;
so this should either go away or become (propery false) *)
Definition propSSNI t : Checker :=
forAllShrinkShow gen_variation_state (fun _ => nil) (fun _ => ""%string)
(* shrinkVState *)
(propSSNI_helper t).