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