[java][frontend] Skip concrete method capture in Kotlin classes

Summary:
Capture of certain Kotlin files fails at the javalib level (probably,
some unanticipated bytecode pattern). We however can't just completely
skip Kotlin class-files during capture as those have NotNull/Nullable
annotations on methods/params that are important for Java <- Kotlin
interop (using Kt classes from Java).

Instead we can skip translation of concrete methods from Kotlin classes
while retaining method signatures with annots in the TEnv.

Reviewed By: ngorogiannis

Differential Revision: D22897638

fbshipit-source-id: 67909aa43

infer/src/base/Config.ml

@@ -186,6 +186,8 @@ let smt_output = false
 
 let source_file_extentions = [".java"; ".m"; ".mm"; ".c"; ".cc"; ".cpp"; ".h"]
 
+let kotlin_source_extension = ".kt"
+
 let specs_files_suffix = ".specs"
 
 (** Enable detailed tracing information during array abstraction *)

infer/src/base/Config.mli

@@ -126,6 +126,8 @@ val smt_output : bool
 
 val source_file_extentions : string list
 
+val kotlin_source_extension : string
+
 val sourcepath : string option
 
 val sources : string list

infer/src/base/SourceFile.ml

@@ -73,6 +73,8 @@ let to_string =
         else path
 
 
+let has_extension t ~ext = String.is_suffix (to_string t) ~suffix:ext
+
 let pp fmt fname = Format.pp_print_string fmt (to_string fname)
 
 let to_abs_path fname =

infer/src/base/SourceFile.mli

@@ -62,4 +62,7 @@ val to_string : ?force_relative:bool -> t -> string
 (** convert a source file to a string WARNING: result may not be valid file path, do not use this
     function to perform operations on filenames *)
 
+val has_extension : t -> ext:string -> bool
+(** returns whether the source file has provided extension *)
+
 module SQLite : SqliteUtils.Data with type t = t

infer/src/java/jFrontend.ml

@@ -89,8 +89,10 @@ let add_edges (context : JContext.t) start_node exn_node exit_nodes method_body_
 (** Add a concrete method. *)
 let add_cmethod source_file program icfg cm proc_name =
   let cn, _ = JBasics.cms_split cm.Javalib.cm_class_method_signature in
-  if Inferconfig.skip_implementation_matcher source_file proc_name then
+  if
-    ignore (JTrans.create_empty_procdesc source_file program icfg cm proc_name)
+    Inferconfig.skip_implementation_matcher source_file proc_name
+    || SourceFile.has_extension source_file ~ext:Config.kotlin_source_extension
+  then ignore (JTrans.create_empty_procdesc source_file program icfg cm proc_name)
   else
     match JTrans.create_cm_procdesc source_file program icfg cm proc_name with
     | None ->