You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
|
|
|
|
(*
|
|
|
|
|
* Copyright (c) 2017 - present Facebook, Inc.
|
|
|
|
|
* All rights reserved.
|
|
|
|
|
*
|
|
|
|
|
* This source code is licensed under the BSD style license found in the
|
|
|
|
|
* LICENSE file in the root directory of this source tree. An additional grant
|
|
|
|
|
* of patent rights can be found in the PATENTS file in the same directory.
|
|
|
|
|
*)
|
|
|
|
|
|
|
|
|
|
open! IStd
|
|
|
|
|
|
|
|
|
|
module F = Format
|
|
|
|
|
module L = Logging
|
|
|
|
|
|
|
|
|
|
(* Extremely simple abstraction of resources: count the number of acquired resources. If there's
|
|
|
|
|
not a corresponding number of releases, there may be a leak. *)
|
|
|
|
|
type astate = int (* 2(a) *)
|
|
|
|
|
|
|
|
|
|
(* For now, type of abstract state and summary are the same *)
|
|
|
|
|
type summary = astate (* 4(a) *)
|
|
|
|
|
|
|
|
|
|
let (<=) ~lhs ~rhs =
|
|
|
|
|
lhs <= rhs
|
|
|
|
|
|
|
|
|
|
let join =
|
|
|
|
|
Pervasives.max
|
|
|
|
|
|
|
|
|
|
let widen ~prev ~next ~num_iters:_ =
|
|
|
|
|
join prev next
|
|
|
|
|
|
|
|
|
|
let pp fmt astate =
|
|
|
|
|
F.fprintf fmt "Resource count: %d" astate
|
|
|
|
|
|
|
|
|
|
(* At the beginning of a procedure, assume no resources are held *)
|
|
|
|
|
let initial = 0
|
