pghs975uc
/
infer_clone
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
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.
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from '8d44265ca1'
${ noResults }
infer_clone/infer/src/pulse/PulseExecutionState.mli

21 lines
592 B
Raw Normal View History Unescape

[pulse] Distinguish exit state at top level Summary: This diff lifts the `PulseAbductiveDomain.t` in `PulseExecutionState` by tracking whether the program continues the analysis normally or exits unusually (e.g. by calling `exit` or `throw`): ``` type exec_state = | ContinueProgram of PulseAbductiveDomain.t (** represents the state at the program point *) | ExitProgram of PulseAbductiveDomain.t (** represents the state originating at exit/divergence. *) ``` Now, Pulse's actual domain is tracked by `PulseExecutionState` and as soon as we try to analyze an instruction at `ExitProgram`, we simply return its state. The aim is to recover the state at the time of the exit, rather than simply ignoring them (i.e. returning empty disjuncts). This allows us to get rid of some FNs that we were not able to detect before. Moreover, it also allows the impurity analysis to be more precise since we will know how the state changed up to exit. TODO: - Impurity analysis needs to be improved to consider functions that simply exit as impure. - The next goal is to handle error state similarly so that when pulse finds an error, we recover the state at the error location (and potentially continue to analyze?). Disclaimer: currently, we handle throw statements like exit (as was the case before). However, this is not correct. Ideally, control flow from throw nodes follows catch nodes rather than exiting the program entirely. Reviewed By: jvillard Differential Revision: D20791747 fbshipit-source-id: df9e5445a
5 years ago
(*
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*)
open! IStd
type exec_state =
| ContinueProgram of PulseAbductiveDomain.t (** represents the state at the program point *)
| ExitProgram of PulseAbductiveDomain.t
(** represents the state originating at exit/divergence. *)
include AbstractDomain.NoJoin with type t = exec_state
val continue : PulseAbductiveDomain.t -> t
val of_post : Procdesc.t -> t -> t
val mk_initial : Procdesc.t -> t