Put goto label map into Context instead of one global map

Summary:public
This will allow us to run translation of more than one function at the same time.

Reviewed By: dulmarod

Differential Revision: D3167965

fb-gh-sync-id: 41e9935
fbshipit-source-id: 41e9935

infer/src/clang/cContext.ml

@@ -19,6 +19,8 @@ type curr_class =
   | ContextProtocol of string  (* category name and corresponding class *)
   | ContextNoCls
 
+type str_node_map = (string, Cfg.Node.t) Hashtbl.t
+
 type t =
   {
     tenv : Tenv.t;
@@ -31,6 +33,7 @@ type t =
     is_callee_expression : bool;
     outer_context : t option; (* in case of objc blocks, the context of the method containing the block *)
     mutable blocks_static_vars : ((Pvar.t * Sil.typ) list) Procname.Map.t;
+    label_map : str_node_map;
   }
 
 let create_context tenv cg cfg procdesc curr_class return_param_typ is_objc_method context_opt =
@@ -43,7 +46,8 @@ let create_context tenv cg cfg procdesc curr_class return_param_typ is_objc_meth
     is_callee_expression = false;
     is_objc_method = is_objc_method;
     outer_context = context_opt;
-    blocks_static_vars = Procname.Map.empty
+    blocks_static_vars = Procname.Map.empty;
+    label_map = Hashtbl.create 17;
   }
 
 let get_cfg context = context.cfg

infer/src/clang/cContext.mli

@@ -17,6 +17,8 @@ type curr_class =
   | ContextProtocol of string  (* category name and corresponding class *)
   | ContextNoCls
 
+type str_node_map = (string, Cfg.Node.t) Hashtbl.t
+
 type t =
   {
     tenv : Tenv.t;
@@ -29,6 +31,7 @@ type t =
     is_callee_expression : bool;
     outer_context : t option; (* in case of objc blocks, the context of the method containing the block *)
     mutable blocks_static_vars : ((Pvar.t * Sil.typ) list) Procname.Map.t;
+    label_map : str_node_map;
   }
 
 val get_procdesc : t -> Cfg.Procdesc.t

infer/src/clang/cFrontend_decl.ml

@@ -61,8 +61,6 @@ struct
         ()
 
   let function_decl tenv cfg cg func_decl block_data_opt =
-    Printing.log_out "\nResetting the goto_labels hashmap...\n";
-    CTrans_utils.GotoLabel.reset_all_labels (); (* C Language Std 6.8.6.1-1 *)
     let captured_vars, outer_context_opt =
       match block_data_opt with
       | Some (outer_context, _, _, captured_vars) -> captured_vars, Some outer_context

infer/src/clang/cTrans_utils.ml

@@ -82,23 +82,19 @@ struct
 
 end
 
-type str_node_map = (string, Cfg.Node.t) Hashtbl.t
-
 module GotoLabel =
 struct
 
   (* stores goto labels local to a function, with the relative node in the cfg *)
-  let goto_label_node_map : str_node_map = Hashtbl.create 17
+  let goto_label_node_map : CContext.str_node_map = Hashtbl.create 17
-
-  let reset_all_labels () = Hashtbl.reset goto_label_node_map
 
   let find_goto_label context label sil_loc =
     try
-      Hashtbl.find goto_label_node_map label
+      Hashtbl.find context.CContext.label_map label
     with Not_found ->
       let node_name = Format.sprintf "GotoLabel_%s" label in
       let new_node = Nodes.create_node (Cfg.Node.Skip_node node_name) [] [] sil_loc context in
-      Hashtbl.add goto_label_node_map label new_node;
+      Hashtbl.add context.CContext.label_map label new_node;
       new_node
 end
 

infer/src/clang/cTrans_utils.mli

@@ -177,9 +177,6 @@ end
 module GotoLabel :
 sig
   val find_goto_label : CContext.t -> string -> Location.t -> Cfg.Node.t
-
-  val reset_all_labels : unit -> unit
-
 end
 
 (** Module that provides utility functions for translating different types of loops. *)