[infer][backend] Save the pretty-print of the type environment when running the analysis in debug mode

Summary: This is very useful to debug issues that have to do with types, for example the cast errors

Reviewed By: sblackshear

Differential Revision: D4289790

fbshipit-source-id: ef5a8bf

infer/src/IR/StructTyp.re

@@ -34,16 +34,26 @@ type lookup = Typename.t => option t;
 
 let compare_fld_typ_ann = [%compare : (Ident.fieldname, Typ.t, Annot.Item.t)];
 
-let pp pe name f {fields} =>
-  if false {
+let pp pe name f {fields, supers, methods, annots} =>
+  if Config.debug_mode {
     /* change false to true to print the details of struct */
     F.fprintf
       f
-      "%a {%a}"
+      "%a \n\tfields: {%a\n\t}\n\tsupers: {%a\n\t}\n\tmethods: {%a\n\t}\n\tannots: {%a\n\t}"
       Typename.pp
       name
-      (pp_seq (fun f (fld, t, _) => F.fprintf f "%a %a" (Typ.pp_full pe) t Ident.pp_fieldname fld))
+      (
+        pp_seq (
+          fun f (fld, t, _) => F.fprintf f "\n\t\t%a %a" (Typ.pp_full pe) t Ident.pp_fieldname fld
+        )
+      )
       fields
+      (pp_seq (fun f n => F.fprintf f "\n\t\t%a" Typename.pp n))
+      supers
+      (pp_seq (fun f m => F.fprintf f "\n\t\t%a" Procname.pp m))
+      methods
+      Annot.Item.pp
+      annots
   } else {
     F.fprintf f "%a" Typename.pp name
   };

infer/src/IR/Tenv.re

@@ -22,6 +22,16 @@ let module TypenameHash = Hashtbl.Make {
 /** Type for type environment. */
 type t = TypenameHash.t StructTyp.t;
 
+let pp fmt (tenv: t) =>
+  TypenameHash.iter
+    (
+      fun name typ => {
+        Format.fprintf fmt "@[<6>NAME: %s@." (Typename.to_string name);
+        Format.fprintf fmt "@[<6>TYPE: %a@." (StructTyp.pp pe_text name) typ
+      }
+    )
+    tenv;
+
 
 /** Create a new type environment. */
 let create () => TypenameHash.create 1000;
@@ -118,19 +128,17 @@ let load_from_file (filename: DB.filename) :option t =>
 
 
 /** Save a type environment into a file */
-let store_to_file (filename: DB.filename) (tenv: t) =>
+let store_to_file (filename: DB.filename) (tenv: t) => {
   Serialization.to_file tenv_serializer filename tenv;
+  if Config.debug_mode {
+    let debug_filename = DB.filename_to_string (DB.filename_add_suffix filename ".debug");
+    let out_channel = open_out debug_filename;
+    let fmt = Format.formatter_of_out_channel out_channel;
+    Format.fprintf fmt "%a" pp tenv;
+    close_out out_channel
+  }
+};
 
 let iter f tenv => TypenameHash.iter f tenv;
 
 let fold f tenv => TypenameHash.fold f tenv;
-
-let pp fmt (tenv: t) =>
-  TypenameHash.iter
-    (
-      fun name typ => {
-        Format.fprintf fmt "@[<6>NAME: %s@." (Typename.to_string name);
-        Format.fprintf fmt "@[<6>TYPE: %a@." (StructTyp.pp pe_text name) typ
-      }
-    )
-    tenv;