[Inferbo] Small preparatory changes

Reviewed By: skcho

Differential Revision: D14258200

fbshipit-source-id: d0822d34c

infer/src/bufferoverrun/bufferOverrunAnalysis.ml

@@ -26,10 +26,11 @@ module Payload = SummaryPayload.Make (struct
   let of_payloads (payloads : Payloads.t) = payloads.buffer_overrun_analysis
 end)
 
-type extras =
+type summary_and_formals = BufferOverrunAnalysisSummary.t * (Pvar.t * Typ.t) list
-  { get_proc_summary:
+
-      Typ.Procname.t -> (BufferOverrunAnalysisSummary.t * (Pvar.t * Typ.t) list) option
+type get_proc_summary_and_formals = Typ.Procname.t -> summary_and_formals option
-  ; oenv: Dom.OndemandEnv.t }
+
+type extras = {get_proc_summary_and_formals: get_proc_summary_and_formals; oenv: Dom.OndemandEnv.t}
 
 module CFG = ProcCfg.NormalOneInstrPerNode
 
@@ -141,7 +142,8 @@ module TransferFunctions = struct
 
 
   let exec_instr : Dom.Mem.t -> extras ProcData.t -> CFG.Node.t -> Sil.instr -> Dom.Mem.t =
-   fun mem {pdesc; tenv; extras= {get_proc_summary; oenv= {integer_type_widths}}} node instr ->
+   fun mem {pdesc; tenv; extras= {get_proc_summary_and_formals; oenv= {integer_type_widths}}} node
+       instr ->
     match instr with
     | Load (id, _, _, _) when Ident.is_none id ->
         mem
@@ -149,7 +151,7 @@ module TransferFunctions = struct
       -> (
       match Pvar.get_initializer_pname pvar with
       | Some callee_pname -> (
-        match get_proc_summary callee_pname with
+        match get_proc_summary_and_formals callee_pname with
         | Some (callee_mem, _) ->
             let v = Dom.Mem.find (Loc.of_pvar pvar) callee_mem in
             Dom.Mem.add_stack (Loc.of_id id) v mem
@@ -227,7 +229,7 @@ module TransferFunctions = struct
             in
             exec model_env ~ret mem
         | None -> (
-          match get_proc_summary callee_pname with
+          match get_proc_summary_and_formals callee_pname with
           | Some (callee_exit_mem, callee_formals) ->
               instantiate_mem tenv integer_type_widths ret callee_formals callee_pname params mem
                 callee_exit_mem location
@@ -281,25 +283,20 @@ let get_local_decls : Procdesc.t -> local_decls =
   Procdesc.get_locals proc_desc |> List.fold ~init:PowLoc.empty ~f:accum_local_decls
 
 
-let cached_compute_invariant_map =
+let compute_invariant_map :
-  let compute_invariant_map : Procdesc.t -> Tenv.t -> Typ.IntegerWidths.t -> invariant_map =
+    Procdesc.t -> Tenv.t -> Typ.IntegerWidths.t -> get_proc_summary_and_formals -> invariant_map =
-   fun pdesc tenv integer_type_widths ->
+ fun pdesc tenv integer_type_widths get_proc_summary_and_formals ->
-    Preanal.do_preanalysis pdesc tenv ;
+  Preanal.do_preanalysis pdesc tenv ;
-    let cfg = CFG.from_pdesc pdesc in
+  let cfg = CFG.from_pdesc pdesc in
-    let pdata =
+  let pdata =
-      let oenv = Dom.OndemandEnv.mk pdesc tenv integer_type_widths in
+    let oenv = Dom.OndemandEnv.mk pdesc tenv integer_type_widths in
-      let get_proc_summary callee_pname =
+    ProcData.make pdesc tenv {get_proc_summary_and_formals; oenv}
-        Ondemand.analyze_proc_name ~caller_pdesc:pdesc callee_pname
-        |> Option.bind ~f:(fun summary ->
-               Payload.of_summary summary
-               |> Option.map ~f:(fun payload ->
-                      (payload, Summary.get_proc_desc summary |> Procdesc.get_pvar_formals) ) )
-      in
-      ProcData.make pdesc tenv {get_proc_summary; oenv}
-    in
-    let initial = Init.initial_state pdata (CFG.start_node cfg) in
-    Analyzer.exec_pdesc ~do_narrowing:true ~initial pdata
   in
+  let initial = Init.initial_state pdata (CFG.start_node cfg) in
+  Analyzer.exec_pdesc ~do_narrowing:true ~initial pdata
+
+
+let cached_compute_invariant_map =
   (* Use a weak Hashtbl to prevent memory leaks (GC unnecessarily keeps invariant maps around) *)
   let module WeakInvMapHashTbl = Caml.Weak.Make (struct
     type t = Typ.Procname.t * invariant_map option
@@ -318,7 +315,16 @@ let cached_compute_invariant_map =
         (* this should never happen *)
         assert false
     | None ->
-        let inv_map = compute_invariant_map pdesc tenv integer_type_widths in
+        let get_proc_summary_and_formals callee_pname =
+          Ondemand.analyze_proc_name ~caller_pdesc:pdesc callee_pname
+          |> Option.bind ~f:(fun summary ->
+                 Payload.of_summary summary
+                 |> Option.map ~f:(fun payload ->
+                        (payload, Summary.get_proc_desc summary |> Procdesc.get_pvar_formals) ) )
+        in
+        let inv_map =
+          compute_invariant_map pdesc tenv integer_type_widths get_proc_summary_and_formals
+        in
         WeakInvMapHashTbl.add inv_map_cache (pname, Some inv_map) ;
         inv_map
 

infer/src/bufferoverrun/bufferOverrunChecker.ml

@@ -265,10 +265,11 @@ let instantiate_cond :
     latest_prune
 
 
+type checks_summary = BufferOverrunCheckerSummary.t
+
 type get_proc_summary =
      Typ.Procname.t
-  -> (BufferOverrunAnalysisSummary.t * BufferOverrunCheckerSummary.t * (Pvar.t * Typ.t) list)
+  -> (BufferOverrunAnalysisSummary.t * (Pvar.t * Typ.t) list * checks_summary) option
-     option
 
 let check_instr :
        get_proc_summary
@@ -306,7 +307,7 @@ let check_instr :
           check model_env mem cond_set
       | None -> (
         match get_proc_summary callee_pname with
-        | Some (callee_mem, callee_condset, callee_formals) ->
+        | Some (callee_mem, callee_formals, callee_condset) ->
             instantiate_cond tenv integer_type_widths callee_pname callee_formals params mem
               callee_mem callee_condset location
             |> PO.ConditionSet.join cond_set
@@ -398,10 +399,8 @@ let compute_checks :
     ~init:Checks.empty
 
 
-type checks_summary = PO.ConditionSet.summary_t
+let report_errors : Tenv.t -> checks -> Summary.t -> unit =
-
+ fun tenv {cond_set; unused_branches; unreachable_statements} summary ->
-let report_errors : Tenv.t -> Summary.t -> checks -> unit =
- fun tenv summary {cond_set; unused_branches; unreachable_statements} ->
   UnusedBranches.report tenv summary unused_branches ;
   UnreachableStatements.report summary unreachable_statements ;
   let report cond trace issue_type =
@@ -417,7 +416,7 @@ let report_errors : Tenv.t -> Summary.t -> checks -> unit =
   PO.ConditionSet.report_errors ~report cond_set
 
 
-let checks_summary : BufferOverrunAnalysis.local_decls -> checks -> checks_summary =
+let get_checks_summary : BufferOverrunAnalysis.local_decls -> checks -> checks_summary =
  fun locals
      Checks.({ cond_set
              ; unused_branches= _ (* intra-procedural *)
@@ -444,14 +443,14 @@ let checker : Callbacks.proc_callback_args -> Summary.t =
                Option.map2 analysis_payload checker_payload
                  ~f:(fun analysis_payload checker_payload ->
                    ( analysis_payload
-                   , checker_payload
+                   , Summary.get_proc_desc summary |> Procdesc.get_pvar_formals
-                   , Summary.get_proc_desc summary |> Procdesc.get_pvar_formals ) ) )
+                   , checker_payload ) ) )
       in
       compute_checks get_proc_summary proc_desc tenv integer_type_widths cfg inv_map
     in
-    report_errors tenv summary checks ;
+    report_errors tenv checks summary ;
     let locals = BufferOverrunAnalysis.get_local_decls proc_desc in
-    let cond_set = checks_summary locals checks in
+    let cond_set = get_checks_summary locals checks in
     Payload.update_summary cond_set summary
   in
   NodePrinter.finish_session underlying_exit_node ;