Add --clang-yojson-file flag

Summary:
:
New flag (equivalent to --clang-biniou-file) to pass in AST to
frontend.

Passing in json files has the big advantage of emitting line numbers
on frontend AST errors.

Reviewed By: jvillard

Differential Revision: D23814358

fbshipit-source-id: 0ad0452ff

infer/man/man1/infer-capture.txt

@@ -223,7 +223,9 @@ CLANG LINTERS OPTIONS
            --no-linters-validate-syntax-only)
 CLANG OPTIONS
        --clang-biniou-file file
-           Specify a file containing the AST of the program, in biniou format
+           Specify a file containing the AST of the program, in biniou
+           format. Please note you still need to provide a compilation
+           command.
 
        --clang-blacklisted-flags +string
            Clang flags to filter out
@@ -236,6 +238,11 @@ CLANG OPTIONS
            arrays) is not done element by element but using a builtin
            function that each analysis has to model.
 
+       --clang-yojson-file file
+           Specify a file containing the AST of the program, in yojson
+           format. Please note you still need to provide a compilation
+           command.
+
        --compilation-database +path
            File that contain compilation commands (can be specified multiple
            times)

infer/man/man1/infer-full.txt

@@ -220,8 +220,9 @@ OPTIONS
            relative to project root or be absolute           See also infer-analyze(1).
 
        --clang-biniou-file file
-           Specify a file containing the AST of the program, in biniou format       
+           Specify a file containing the AST of the program, in biniou
-    See also infer-capture(1).
+           format. Please note you still need to provide a compilation
+           command.           See also infer-capture(1).
 
        --clang-blacklisted-flags +string
            Clang flags to filter out           See also infer-capture(1).
@@ -234,6 +235,11 @@ OPTIONS
            arrays) is not done element by element but using a builtin
            function that each analysis has to model.           See also infer-analyze(1) and infer-capture(1).
 
+       --clang-yojson-file file
+           Specify a file containing the AST of the program, in yojson
+           format. Please note you still need to provide a compilation
+           command.           See also infer-capture(1).
+
        --compilation-database +path
            File that contain compilation commands (can be specified multiple
            times)           See also infer-capture(1).
@@ -1371,6 +1377,9 @@ INTERNAL OPTIONS
        --clang-libcxx-include-to-override-regex-reset
            Cancel the effect of --clang-libcxx-include-to-override-regex.
 
+       --clang-yojson-file-reset
+           Cancel the effect of --clang-yojson-file.
+
        --classpath string
            Specify the Java classpath
 

infer/man/man1/infer.txt

@@ -220,8 +220,9 @@ OPTIONS
            relative to project root or be absolute           See also infer-analyze(1).
 
        --clang-biniou-file file
-           Specify a file containing the AST of the program, in biniou format       
+           Specify a file containing the AST of the program, in biniou
-    See also infer-capture(1).
+           format. Please note you still need to provide a compilation
+           command.           See also infer-capture(1).
 
        --clang-blacklisted-flags +string
            Clang flags to filter out           See also infer-capture(1).
@@ -234,6 +235,11 @@ OPTIONS
            arrays) is not done element by element but using a builtin
            function that each analysis has to model.           See also infer-analyze(1) and infer-capture(1).
 
+       --clang-yojson-file file
+           Specify a file containing the AST of the program, in yojson
+           format. Please note you still need to provide a compilation
+           command.           See also infer-capture(1).
+
        --compilation-database +path
            File that contain compilation commands (can be specified multiple
            times)           See also infer-capture(1).

infer/src/base/Config.ml

@@ -824,7 +824,9 @@ and check_version =
 and clang_biniou_file =
   CLOpt.mk_path_opt ~long:"clang-biniou-file"
     ~in_help:InferCommand.[(Capture, manual_clang)]
-    ~meta:"file" "Specify a file containing the AST of the program, in biniou format"
+    ~meta:"file"
+    "Specify a file containing the AST of the program, in biniou format. Please note you still \
+     need to provide a compilation command."
 
 
 and clang_compound_literal_init_limit =
@@ -894,6 +896,14 @@ and clang_libcxx_include_to_override_regex =
      $(b,-I /path/to/infer/facebook-clang-plugins/clang/install/include/c++/v1)."
 
 
+and clang_yojson_file =
+  CLOpt.mk_path_opt ~long:"clang-yojson-file"
+    ~in_help:InferCommand.[(Capture, manual_clang)]
+    ~meta:"file"
+    "Specify a file containing the AST of the program, in yojson format. Please note you still \
+     need to provide a compilation command."
+
+
 and classpath = CLOpt.mk_string_opt ~long:"classpath" "Specify the Java classpath"
 
 and compilation_database =
@@ -2737,7 +2747,17 @@ and check_version = !check_version
 
 and checkers = List.map !all_checkers ~f:(fun (checker, _, var) -> (checker, !var))
 
-and clang_biniou_file = !clang_biniou_file
+and clang_ast_file =
+  match (!clang_biniou_file, !clang_yojson_file) with
+  | Some _, Some _ ->
+      L.die UserError "Please provide only one of --clang-biniou-file and --clang-yojson-file"
+  | Some b, _ ->
+      Some (`Biniou b)
+  | _, Some y ->
+      Some (`Yojson y)
+  | _ ->
+      None
+
 
 and clang_compilation_dbs = !clang_compilation_dbs
 

infer/src/base/Config.mli

@@ -200,7 +200,7 @@ val changed_files_index : string option
 
 val check_version : string option
 
-val clang_biniou_file : string option
+val clang_ast_file : [`Biniou of string | `Yojson of string] option
 
 val clang_compound_literal_init_limit : int
 

infer/src/clang/Capture.ml

@@ -14,9 +14,13 @@ let debug_mode = Config.debug_mode || Config.frontend_stats
 
 (** This function reads the json file in fname, validates it, and encodes in the AST data structure
     defined in Clang_ast_t. *)
-let validate_decl_from_file fname =
+let validate_decl_from_file file =
-  Atdgen_runtime.Util.Biniou.from_file ~len:CFrontend_config.biniou_buffer_size
+  match file with
-    Clang_ast_b.read_decl fname
+  | `Biniou fname ->
+      Atdgen_runtime.Util.Biniou.from_file ~len:CFrontend_config.biniou_buffer_size
+        Clang_ast_b.read_decl fname
+  | `Yojson fname ->
+      Atdgen_runtime.Util.Json.from_file Clang_ast_j.read_decl fname
 
 
 let validate_decl_from_channel chan =
@@ -38,9 +42,9 @@ let run_clang_frontend ast_source =
   in
   let ast_decl =
     match ast_source with
-    | `File path ->
+    | `File file ->
-        validate_decl_from_file path
+        validate_decl_from_file file
-    | `Pipe chan ->
+    | `BiniouPipe chan ->
         validate_decl_from_channel chan
   in
   let trans_unit_ctx =
@@ -76,9 +80,9 @@ let run_clang_frontend ast_source =
   in
   let pp_ast_filename fmt ast_source =
     match ast_source with
-    | `File path ->
+    | `File (`Biniou path) | `File (`Yojson path) ->
         Format.pp_print_string fmt path
-    | `Pipe _ ->
+    | `BiniouPipe _ ->
         Format.fprintf fmt "stdin of %a" SourceFile.pp trans_unit_ctx.CFrontend_config.source_file
   in
   ClangPointers.populate_all_tables ast_decl ;
@@ -176,12 +180,12 @@ let cc1_capture clang_cmd =
     L.(debug Capture Quiet) "@\n Skip compilation and analysis of source file %s@\n@\n" source_path ;
     () )
   else
-    match Config.clang_biniou_file with
+    match Config.clang_ast_file with
     | Some fname ->
         run_and_validate_clang_frontend (`File fname)
     | None ->
         run_plugin_and_frontend source_path
-          (fun chan_in -> run_and_validate_clang_frontend (`Pipe chan_in))
+          (fun chan_in -> run_and_validate_clang_frontend (`BiniouPipe chan_in))
           clang_cmd