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simplest_model_with_mods: advanced analyzer with more argument properties
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ProgramSnail
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commit
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3 changed files with 479 additions and 2 deletions
469
simplest_model_with_mods/analyzer_cap.ml
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469
simplest_model_with_mods/analyzer_cap.ml
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@ -0,0 +1,469 @@
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module Functional =
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struct
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(* --- types --- *)
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type data = int
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type read_cap = Rd | NRd
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type write_cap = Wr | NWr
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type copy_cap = Cp | NCp
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type in_cap = In | NIn
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type out_cap = Out | NOut
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type tag = read_cap * write_cap * copy_cap * in_cap * out_cap
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type stmt = Call of data * data list | Read of data | Write of data
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type body = stmt list
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type fun_decl = tag list * body
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type prog = fun_decl list * fun_decl
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(* --- exceptions --- *)
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exception Incorrect_memory_access of int
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exception Ref_rvalue_argument of int
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exception Incorrect_const_cast of int
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exception Invalid_argument_tag of int
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(* --- static interpreter (no rec) --- *)
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(* TODO: allow data (rvalue) in calls ?? *)
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type arg = RValue | LValue of data
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type value = UnitV | BotV (* NOTE: RefV of data - not needed for now *)
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type env = (int * (tag * data)) list
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(* env * memory * last unused memory * visited functions *)
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type state = env * value list * int * int list
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(* --- *)
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let is_read (tag : tag) : bool = match tag with
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| (Rd, _, _, _, _) -> true
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| (NRd, _, _, _, _) -> false
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let is_write (tag : tag) : bool = match tag with
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| (_, Wr, _, _, _) -> true
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| (_, NWr, _, _, _) -> false
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let is_copy (tag : tag) : bool = match tag with
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| (_, _, Cp, _, _) -> true
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| (_, _, NCp, _, _) -> false
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let is_in (tag : tag) : bool = match tag with
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| (_, _, _, In, _) -> true
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| (_, _, _, NIn, _) -> false
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let is_out (tag : tag) : bool = match tag with
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| (_, _, _, _, Out) -> true
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| (_, _, _, _, NOut) -> false
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(* --- *)
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let rec list_replace xs id value = match (xs, id) with
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| (_x :: xs, 0) -> value :: xs
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| (x :: xs, _n) -> x :: list_replace xs (id - 1) value
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| ([], _) -> raise Not_found
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let visited_add (state : state) (id : data) : state =
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match state with (env, mem, mem_len, visited) -> (env, mem, mem_len, id :: visited)
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let visited_check (state : state) (id : data) : bool =
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match state with (_, _, _, visited) -> List.exists (fun i -> i == id) visited
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let env_get (state : state) (id : data) : (tag * data) =
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match state with (env, _mem, _mem_len, _visited) -> List.assoc id env
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let env_add (state : state) (id : data) (mode : tag) (mem_id : data) : state = match state with
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(env, mem, mem_len, visited) -> let env = (id, (mode, mem_id)) :: env in
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(env, mem, mem_len, visited)
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let inv_id (mem_len : int) (id : data) : data = mem_len - id - 1
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let mem_get (state : state) (id : data) : value = match state with
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(_env, mem, mem_len, _visited) -> List.nth mem @@ inv_id mem_len @@ snd @@ env_get state id
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let mem_set (state : state) (id : data) (value : value) : state = match state with
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(env, mem, mem_len, visited) -> let mem_id = inv_id mem_len @@ snd @@ env_get state id in
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let mem = list_replace mem mem_id value in (env, mem, mem_len, visited)
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let mem_add (state : state) (value : value) : state = match state with
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(env, mem, mem_len, visited) -> let mem = value :: mem in (env, mem, mem_len + 1, visited)
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let mem_check (state : state) (id : data) : state =
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if mem_get state id == BotV then raise @@ Incorrect_memory_access id else state
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let arg_to_value (state : state) (arg : arg) : value = match arg with
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| RValue -> UnitV
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| LValue id -> mem_get state id
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let st_mem_len (state : state) : int =
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match state with (_, _, mem_len, _) -> mem_len
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(* TODO *)
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let check_tag_correct (tag : tag) (id : data) : unit =
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if (* (is_in tag && not (is_read tag)) || *) (* TODO: required ?? *)
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(is_out tag && not (is_write tag))
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(* || is_copy tag && is_out tag *) (* ?? *)
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then raise @@ Invalid_argument_tag id
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else ()
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let st_add_arg (state : state) (state_before : state)
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(id : data) (arg_tag : tag) (arg : arg) : state =
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check_tag_correct arg_tag id;
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if is_copy arg_tag
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then let state = mem_add state (arg_to_value state_before arg) in
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env_add state id arg_tag (st_mem_len state - 1)
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else match arg with
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| RValue -> raise @@ Ref_rvalue_argument id (* TODO: allow later ?? *)
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| LValue arg -> let (parent_tag, mem_id) = env_get state_before arg in
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if is_write arg_tag > is_write parent_tag
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then raise @@ Incorrect_const_cast id
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else if is_read arg_tag
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then env_add state id arg_tag mem_id
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(* TODO: parent state is spoiled, check that this is correct *)
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else let state_ext = env_add state id arg_tag mem_id in
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mem_set state_ext id BotV
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(* TODO: FIXME: do not spoil out arguments *)
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let st_spoil_by_args (state : state) (arg_tags : tag list) (args : data list) : state =
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match state with (env, mem, mem_len, _visited) ->
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let spoil_folder (state : state) (tag : tag) (id : data) : state =
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let parent_tag = fst (env_get state id) in
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if not (is_copy tag) && not (is_out tag)
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then (if is_write tag > is_write parent_tag
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(* || is_read tag > is_read parent_tag *) (* TODO FIXME: check that can read *)
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then raise @@ Incorrect_const_cast id
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else let state_checked = if is_read tag
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then mem_check state id
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else state
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in
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if is_write tag
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then mem_set state_checked id BotV
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else state_checked)
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else state
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in List.fold_left2 spoil_folder state arg_tags args
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let list_drop n xs = List.of_seq @@ Seq.drop n @@ List.to_seq xs
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(* TODO: FIXME: require at least one read / write for read / write args ?? *)
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let rec eval_stmt (state : state) (prog : fun_decl list) (stmt : stmt) : state =
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match stmt with
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| Call (f_id, args) -> let (arg_tags, _) as f_decl = List.nth prog f_id in
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let state_with_visited = if visited_check state f_id
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then state
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else let new_state_with_visited = visited_add state f_id in
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let state_fun = eval_fun new_state_with_visited prog f_decl (List.map (fun arg -> LValue arg) args) in
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(* NOTE: now memory in function is not spoiled *)
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state_fun
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in
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(* let state_checked = List.fold_left2 (fun s arg arg_tag -> *)
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(* if is_read arg_tag *)
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(* then mem_check s arg *)
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(* else s) *)
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(* state_with_visited args arg_tags in *)
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st_spoil_by_args state_with_visited arg_tags args
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| Read id -> mem_check state id
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| Write id -> if is_write @@ fst @@ env_get state id
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then mem_set state id UnitV
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else raise @@ Incorrect_const_cast id
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and eval_body (state : state) (prog : fun_decl list) (body : body) : state =
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List.fold_left (fun state stmt -> eval_stmt state prog stmt) state body
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and eval_fun (state : state) (prog : fun_decl list) (decl : fun_decl) (args : arg list) : state =
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match decl with (arg_tags, body) ->
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match state with (env_before, mem_before, len_before, visited_before) as state_before ->
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let state : state = ([], mem_before, len_before, visited_before) in
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let (state, _) = List.fold_left2 (fun (state, id) arg_tag arg -> (st_add_arg state state_before id arg_tag arg, id + 1))
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(state, 0) arg_tags args in
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let state = eval_body state prog body in
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match state with (_env, mem, len, visited) ->
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(env_before, mem_before, len_before, visited)
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(* (env_before, list_drop (len - len_before) mem, len_before, visited) (* TODO: save some assignments ?? *) *)
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and eval_fun_empty_args (state : state) (prog : fun_decl list) (decl : fun_decl) : state =
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match decl with (arg_tags, _) ->
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let args = List.map (fun _ -> RValue) arg_tags in
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eval_fun state prog decl args
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let empty_state : state = ([], [], 0, [])
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let eval_prog ((prog, main_decl) : prog) = ignore @@ eval_fun_empty_args empty_state prog main_decl
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(* tests *)
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let rwi_value : tag = (Rd, Wr, Cp, In, NOut)
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let ri_value : tag = (Rd, NWr, Cp, In, NOut)
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let wi_value : tag = (NRd, Wr, Cp, In, NOut)
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let i_value : tag = (NRd, NWr, Cp, In, NOut)
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let rwi_ref : tag = (Rd, Wr, NCp, In, NOut)
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let ri_ref : tag = (Rd, NWr, NCp, In, NOut)
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let wi_ref : tag = (NRd, Wr, NCp, In, NOut)
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let i_ref : tag = (NRd, NWr, NCp, In, NOut)
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(* >> tests without functions *)
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let%expect_test "empty" =
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eval_prog ([], ([], []));
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Printf.printf "done!";
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[%expect {| done! |}]
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let%expect_test "ref param in main failure" =
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try (eval_prog ([], ([i_ref], []));
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[%expect.unreachable])
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with Ref_rvalue_argument id -> Printf.printf "%i" id;
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[%expect {| 0 |}]
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let%expect_test "read empty args" =
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try (eval_prog ([], ([], [Read 0]));
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[%expect.unreachable])
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with Not_found -> Printf.printf "done!";
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[%expect {| done! |}]
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let%expect_test "write empty args" =
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try (eval_prog ([], ([], [Write 0]));
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[%expect.unreachable])
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with Not_found -> Printf.printf "done!";
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[%expect {| done! |}]
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let%expect_test "simple write" =
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eval_prog ([], ([wi_value], [Write 0]));
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Printf.printf "done!";
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[%expect {| done! |}]
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let%expect_test "simple read" = (* NOTE: should not work with read-before-write check*)
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eval_prog ([], ([ri_value], [Read 0]));
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Printf.printf "done!";
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[%expect {| done! |}]
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let%expect_test "multiple read & write" =
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eval_prog ([], ([rwi_value], [Write 0; Read 0; Write 0; Write 0; Read 0; Read 0]));
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Printf.printf "done!";
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[%expect {| done! |}]
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let%expect_test "multiple read & write, multiple args" =
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eval_prog ([], ([wi_value; wi_value; wi_value], [Write 0; Read 0; Write 1; Write 0; Write 2; Read 1; Write 2; Read 0; Read 2]));
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Printf.printf "done!";
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[%expect {| done! |}]
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let%expect_test "main, access out of range" =
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try(eval_prog ([], ([wi_value], [Write 0; Read 5 ]));
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[%expect.unreachable])
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with Not_found -> Printf.printf "done!";
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[%expect {| done! |}]
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let%expect_test "main, access out of range" =
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try(eval_prog ([], ([wi_value], [Write 0; Write 5 ]));
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[%expect.unreachable])
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with Not_found -> Printf.printf "done!";
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[%expect {| done! |}]
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(* >> tests with one function *)
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let%expect_test "simple function call with value arg" =
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eval_prog ([([wi_value], [Write 0; Read 0; Write 0])], ([wi_value], [Write 0; Call (0, [0]) ]));
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Printf.printf "done!";
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[%expect {| done! |}]
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let%expect_test "simple function call with ref arg" =
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eval_prog ([([wi_ref], [Write 0; Read 0; Write 0])], ([wi_value], [Write 0; Call (0, [0]) ]));
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Printf.printf "done!";
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[%expect {| done! |}]
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let%expect_test "function with value arg & read" =
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eval_prog ([([wi_value], [Write 0; Read 0; Write 0])], ([wi_value], [Write 0; Call (0, [0]); Read 0 ]));
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Printf.printf "done!";
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[%expect {| done! |}]
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(* --- *)
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let%expect_test "function with ref arg & read" =
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try (eval_prog ([([rwi_ref], [Read 0; Write 0])], ([wi_value], [Write 0; Call (0, [0]); Read 0 ]));
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[%expect.unreachable])
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with Incorrect_memory_access id -> Printf.printf "%i" id;
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[%expect {| 0 |}]
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let%expect_test "function with ref arg & call twice" =
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try (eval_prog ([([rwi_ref], [Read 0; Write 0])], ([wi_value], [Write 0; Call (0, [0]); Call (0, [0]) ]));
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[%expect.unreachable])
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with Incorrect_memory_access id -> Printf.printf "%i" id;
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[%expect {| 0 |}]
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(* NOTE: behaviour is fixed with new capabilities *)
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let%expect_test "function with ref arg, write first & call twice" =
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eval_prog ([([wi_ref], [Write 0; Read 0; Write 0])], ([wi_value], [Write 0; Call (0, [0]); Call (0, [0]) ]));
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Printf.printf "done!";
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[%expect {| done! |}]
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let%expect_test "function with ref arg & read, write" =
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try (eval_prog ([([rwi_ref], [Read 0; Write 0])], ([wi_value], [Write 0; Call (0, [0]); Read 0; Write 0 ]));
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[%expect.unreachable])
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with Incorrect_memory_access id -> Printf.printf "%i" id;
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[%expect {| 0 |}]
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let%expect_test "function with ref arg & write, read" =
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eval_prog ([([rwi_ref], [Read 0; Write 0])], ([wi_value], [Write 0; Call (0, [0]); Write 0; Read 0 ]));
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Printf.printf "done!";
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[%expect {| done! |}]
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let%expect_test "function with ref arg, no write inside & read" =
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eval_prog ([([ri_ref], [Read 0; Read 0])], ([wi_value], [Write 0; Call (0, [0]); Read 0 ]));
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Printf.printf "done!";
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[%expect {| done! |}]
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(* --- *)
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let%expect_test "function with value arg, read out of range" =
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try(eval_prog ([([ri_ref], [Read 0; Read 1])], ([wi_value; i_value], [Write 0; Call (0, [0]); Read 0 ]));
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[%expect.unreachable])
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with Not_found -> Printf.printf "done!";
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[%expect {| done! |}]
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let%expect_test "function with ref arg, read out of range" =
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try(eval_prog ([([ri_ref], [Read 0; Read 1])], ([wi_value; i_value], [Write 0; Call (0, [0]); Read 0 ]));
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[%expect.unreachable])
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with Not_found -> Printf.printf "done!";
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[%expect {| done! |}]
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let%expect_test "function with value arg, write out of range" =
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try(eval_prog ([([rwi_value], [Read 0; Write 1])], ([wi_value; i_value], [Write 0; Call (0, [0]); Read 0 ]));
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[%expect.unreachable])
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with Not_found -> Printf.printf "done!";
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[%expect {| done! |}]
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let%expect_test "function with value arg, call out of range" =
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try(eval_prog ([([ri_value], [Read 0])], ([wi_value; i_value], [Write 0; Call (0, [2]); Read 0 ]));
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[%expect.unreachable])
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with Not_found -> Printf.printf "done!";
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[%expect {| done! |}]
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(* --- *)
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let%expect_test "function with ref & value args, no write inside & read" =
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eval_prog (
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[([ri_ref; ri_value], [Read 0; Read 1])],
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([wi_value; wi_value], [Write 0; Write 1; Call (0, [0; 1]); Read 0; Read 1 ]));
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Printf.printf "done!";
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[%expect {| done! |}]
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let%expect_test "function with ref & value args, write value inside & read" =
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eval_prog (
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[([ri_ref; rwi_value], [Read 0; Read 1; Write 1; Read 1])],
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([wi_value; wi_value], [Write 0; Write 1; Call (0, [0; 1]); Read 0; Read 1 ]));
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Printf.printf "done!";
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[%expect {| done! |}]
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let%expect_test "function with ref & value args, write both inside & read" =
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try (eval_prog (
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[([rwi_ref; rwi_value],[Read 0; Read 1; Write 0; Write 1; Read 1])],
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([wi_value; wi_value], [Write 0; Write 1; Call (0, [0; 1]); Read 0; Read 1 ]));
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[%expect.unreachable])
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with Incorrect_memory_access id -> Printf.printf "%i" id;
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[%expect {| 0 |}]
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(* --- *)
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(* NOTE: maybe important case in the future *)
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let%expect_test "function with ref two same ref args, read both & read" =
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eval_prog (
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[([ri_ref; ri_ref],[Read 0; Read 1; Read 1])],
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([wi_value], [Write 0; Call (0, [0; 0]); Read 0 ]));
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Printf.printf "done!";
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[%expect {| done! |}]
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(* NOTE: changed semantics by comporasion with prev analyzer, new test *)
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let%expect_test "function with ref two same ref args, read & write both & nothing" =
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eval_prog (
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[([ri_ref; ri_ref],[Read 0; Read 1; Read 1])],
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([wi_value], [Write 0; Call (0, [0; 0]); ]));
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Printf.printf "done!";
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[%expect {| done! |}]
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(* NOTE: changed semantics by comporasion with prev analyzer, new test *)
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let%expect_test "function with ref & copy of the same arg, read both & nothing" =
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eval_prog (
|
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[([rwi_ref; rwi_value],[Read 0; Read 1; Write 0; Write 1; Read 1])],
|
||||
([wi_value], [Write 0; Call (0, [0; 0]); ]));
|
||||
Printf.printf "done!";
|
||||
[%expect {| done! |}]
|
||||
|
||||
(* NOTE: maybe important case in the future *)
|
||||
let%expect_test "function with ref two same ref args, read & write both, error" =
|
||||
try (eval_prog (
|
||||
[([rwi_ref; rwi_ref],[Read 0; Read 1; Write 0; Write 1; Read 1])],
|
||||
([wi_value], [Write 0; Call (0, [0; 0]); ]));
|
||||
[%expect.unreachable])
|
||||
with Incorrect_memory_access id -> Printf.printf "%i" id;
|
||||
[%expect {| 0 |}]
|
||||
|
||||
(* >> tests with several functions *)
|
||||
|
||||
let%expect_test "two functions with ref arg, read func -> write func" =
|
||||
eval_prog (
|
||||
[([ri_ref], [Read 0]); ([wi_ref], [Write 0])],
|
||||
([wi_value], [Write 0; Call (0, [0]); Read 0; Call (1, [0]) ]));
|
||||
Printf.printf "done!";
|
||||
[%expect {| done! |}]
|
||||
|
||||
let%expect_test "two functions with ref arg, write func -> read func" =
|
||||
try (eval_prog (
|
||||
[([ri_ref], [Read 0]); ([wi_ref], [Write 0])],
|
||||
([wi_value], [Write 0; Call (1, [0]); Call (0, [0]) ]));
|
||||
[%expect.unreachable])
|
||||
with Incorrect_memory_access id -> Printf.printf "%i" id;
|
||||
[%expect {| 0 |}]
|
||||
|
||||
let%expect_test "two functions: ref arg after value arg" =
|
||||
eval_prog (
|
||||
[([rwi_ref], [Read 0; Write 0]); ([rwi_value], [Read 0; Write 0])],
|
||||
([wi_value], [Write 0; Call (1, [0]); Read 0; Call (0, [0]) ]));
|
||||
Printf.printf "done!";
|
||||
[%expect {| done! |}]
|
||||
|
||||
let%expect_test "two functions: value arg after spoiled ref arg" =
|
||||
try (eval_prog (
|
||||
[([rwi_ref], [Read 0; Write 0]); ([rwi_value], [Read 0; Write 0])],
|
||||
([wi_value], [Write 0; Call (0, [0]); Call (1, [0]) ]));
|
||||
[%expect.unreachable])
|
||||
with Incorrect_memory_access id -> Printf.printf "%i" id;
|
||||
[%expect {| 0 |}]
|
||||
|
||||
(* --- *)
|
||||
|
||||
let%expect_test "simple function call with value arg, const cast error" =
|
||||
try (eval_prog ([([ri_value], [Write 0; Read 0; Write 0])], ([wi_value], [Write 0; Call (0, [0]) ]));
|
||||
[%expect.unreachable])
|
||||
with Incorrect_const_cast id -> Printf.printf "%i" id;
|
||||
[%expect {| 0 |}]
|
||||
|
||||
let%expect_test "simple function call with ref arg, const cast error" =
|
||||
try (eval_prog ([([ri_ref], [Write 0; Read 0; Write 0])], ([wi_value], [Write 0; Call (0, [0]) ]));
|
||||
[%expect.unreachable])
|
||||
with Incorrect_const_cast id -> Printf.printf "%i" id;
|
||||
[%expect {| 0 |}]
|
||||
|
||||
let%expect_test "simple function call with value arg, const cast ok" =
|
||||
eval_prog ([([ri_value], [Read 0])], ([wi_value], [Write 0; Call (0, [0]) ]));
|
||||
Printf.printf "done!";
|
||||
[%expect {| done! |}]
|
||||
|
||||
let%expect_test "simple function call with ref arg, const cast ok" =
|
||||
eval_prog ([([ri_ref], [Read 0])], ([wi_value], [Write 0; Call (0, [0]) ]));
|
||||
Printf.printf "done!";
|
||||
[%expect {| done! |}]
|
||||
|
||||
(* --- *)
|
||||
|
||||
let%expect_test "simple function call with arg, recursive calls" =
|
||||
eval_prog ([([rwi_value], [Write 0; Read 0; Write 0; Call (0, [0])])], ([wi_value], [Write 0; Call (0, [0]) ]));
|
||||
Printf.printf "done!";
|
||||
[%expect {| done! |}]
|
||||
end
|
||||
Loading…
Add table
Add a link
Reference in a new issue