[reporting] aggregate issues from all procedures before reporting

Summary:
The reporting phases iterates over each procedure summary and print all the issues from each procedure.
That's nice because we don't have to build a big list of the issues in-memory, but it's not so nice if you want to ouput the reports in a certain order or de-duplicate them.

This diff builds the in-memory list and outputs the issues afterward. By itself, this isn't very useful. But in the near future it will allow us to:
- Group all of the issues from the same file (finally!!!)
- Get rid of duplicate issues on multiple instantiations of the same C++ template
- Probably other cool stuff too

Reviewed By: jeremydubreil, mbouaziz

Differential Revision: D5816646

fbshipit-source-id: 799bcd0

infer/src/IR/Errlog.ml

@@ -134,6 +134,11 @@ let iter (f: iter_fun) (err_log: t) =
     (fun err_key set -> ErrDataSet.iter (fun err_data -> f err_key err_data) set)
     err_log
 
+let fold (f: err_key -> err_data -> 'a -> 'a) t acc =
+  ErrLogHash.fold
+    (fun err_key set acc -> ErrDataSet.fold (fun err_data acc -> f err_key err_data acc) set acc)
+    t acc
+
 (** Return the number of elements in the error log which satisfy [filter] *)
 let size filter (err_log: t) =
   let count = ref 0 in

infer/src/IR/Errlog.mli

@@ -71,6 +71,8 @@ type iter_fun = err_key -> err_data -> unit
 val iter : iter_fun -> t -> unit
 (** Apply f to nodes and error names *)
 
+val fold : (err_key -> err_data -> 'a -> 'a) -> t -> 'a -> 'a
+
 val pp_loc_trace_elem : Format.formatter -> loc_trace_elem -> unit
 
 val pp_loc_trace : Format.formatter -> loc_trace -> unit

infer/src/backend/InferPrint.ml

@@ -244,10 +244,9 @@ module IssuesCsv = struct
       Io_infer.Xml.tag_key Io_infer.Xml.tag_qualifier_tags Io_infer.Xml.tag_hash "bug_id"
       "always_report" "advice"
 
-  (** Write bug report in csv format *)
+  let pp_issue fmt error_filter procname proc_loc_opt (key: Errlog.err_key)
-  let pp_issues_of_error_log fmt error_filter _ proc_loc_opt procname err_log =
+      (err_data: Errlog.err_data) =
     let pp x = F.fprintf fmt x in
-    let pp_row (key: Errlog.err_key) (err_data: Errlog.err_data) =
     let source_file =
       match proc_loc_opt with
       | Some proc_loc
@@ -304,8 +303,10 @@ module IssuesCsv = struct
       (* bug id *)
       pp "\"%s\"," always_report ;
       pp "\"%s\"@\n" err_advice_string
-    in
+
-    Errlog.iter pp_row err_log
+  (** Write bug report in csv format *)
+  let pp_issues_of_error_log fmt error_filter _ proc_loc_opt procname err_log =
+    Errlog.iter (pp_issue fmt error_filter procname proc_loc_opt) err_log
 end
 
 let potential_exception_message = "potential exception at line"
@@ -319,10 +320,9 @@ module IssuesJson = struct
 
   let pp_json_close fmt () = F.fprintf fmt "]@\n@?"
 
-  (** Write bug report in JSON format *)
+  let pp_issue fmt error_filter procname proc_loc_opt (key: Errlog.err_key)
-  let pp_issues_of_error_log fmt error_filter _ proc_loc_opt procname err_log =
+      (err_data: Errlog.err_data) =
     let pp x = F.fprintf fmt x in
-    let pp_row (key: Errlog.err_key) (err_data: Errlog.err_data) =
     let source_file, procedure_start_line =
       match proc_loc_opt with
       | Some proc_loc
@@ -384,8 +384,7 @@ module IssuesJson = struct
         ; key= err_data.node_id_key.node_key
         ; qualifier_tags= Localise.Tags.tag_value_records_of_tags key.err_desc.tags
         ; hash=
-              get_bug_hash kind bug_type procedure_id file err_data.node_id_key.node_key
+            get_bug_hash kind bug_type procedure_id file err_data.node_id_key.node_key key.err_desc
-                key.err_desc
         ; dotty= error_desc_to_dotty_string key.err_desc
         ; infer_source_loc= json_ml_loc
         ; bug_type_hum= key.err_name.IssueType.hum
@@ -395,8 +394,10 @@ module IssuesJson = struct
       in
       if not !is_first_item then pp "," else is_first_item := false ;
       pp "%s@?" (Jsonbug_j.string_of_jsonbug bug)
-    in
+
-    Errlog.iter pp_row err_log
+  (** Write bug report in JSON format *)
+  let pp_issues_of_error_log fmt error_filter _ proc_loc_opt procname err_log =
+    Errlog.iter (pp_issue fmt error_filter procname proc_loc_opt) err_log
 end
 
 let pp_custom_of_report fmt report fields =
@@ -462,9 +463,7 @@ let tests_jsonbug_compare bug1 bug2 =
     (bug2.file, bug2.procedure, bug2.line - bug2.procedure_start_line, bug2.bug_type, bug2.hash)
 
 module IssuesTxt = struct
-  (** Write bug report in text format *)
+  let pp_issue fmt error_filter proc_loc_opt (key: Errlog.err_key) (err_data: Errlog.err_data) =
-  let pp_issues_of_error_log fmt error_filter _ proc_loc_opt _ err_log =
-    let pp_row (key: Errlog.err_key) (err_data: Errlog.err_data) =
     let source_file =
       match proc_loc_opt with
       | Some proc_loc
@@ -475,8 +474,10 @@ module IssuesTxt = struct
     if key.in_footprint && error_filter source_file key.err_desc key.err_name then
       Exceptions.pp_err ~node_key:err_data.node_id_key.node_key err_data.loc key.err_kind
         key.err_name key.err_desc None fmt ()
-    in
+
-    Errlog.iter pp_row err_log
+  (** Write bug report in text format *)
+  let pp_issues_of_error_log fmt error_filter _ proc_loc_opt _ err_log =
+    Errlog.iter (pp_issue fmt error_filter proc_loc_opt) err_log
 end
 
 let pp_text_of_report fmt report =
@@ -735,6 +736,20 @@ type report_kind = Issues | Procs | Stats | Calls | Summary [@@deriving compare]
 
 type bug_format_kind = Json | Csv | Tests | Text | Latex [@@deriving compare]
 
+let pp_issue_in_format (format_kind, (outf: Utils.outfile)) error_filter
+    (procname, procname_loc, err_key, err_data) =
+  match format_kind with
+  | Csv
+   -> IssuesCsv.pp_issue outf.fmt error_filter procname (Some procname_loc) err_key err_data
+  | Json
+   -> IssuesJson.pp_issue outf.fmt error_filter procname (Some procname_loc) err_key err_data
+  | Latex
+   -> L.(die InternalError) "Printing issues in latex is not implemented"
+  | Tests
+   -> L.(die InternalError) "Print issues as tests is not implemented"
+  | Text
+   -> IssuesTxt.pp_issue outf.fmt error_filter (Some procname_loc) err_key err_data
+
 let pp_issues_in_format (format_kind, (outf: Utils.outfile)) =
   match format_kind with
   | Json
@@ -782,11 +797,13 @@ let pp_issues_of_error_log error_filter linereader proc_loc_opt procname err_log
   in
   List.iter ~f:pp_issues_in_format bug_format_list
 
-let pp_issues error_filter linereader summary bug_format_list =
+let collect_issues summary issues_acc =
   let err_log = summary.Specs.attributes.ProcAttributes.err_log in
   let procname = Specs.get_proc_name summary in
-  let loc = summary.Specs.attributes.ProcAttributes.loc in
+  let proc_loc = summary.Specs.attributes.ProcAttributes.loc in
-  pp_issues_of_error_log error_filter linereader (Some loc) procname err_log bug_format_list
+  Errlog.fold
+    (fun err_key err_data acc -> (procname, proc_loc, err_key, err_data) :: acc)
+    err_log issues_acc
 
 let pp_procs summary procs_format_list =
   let pp_procs_in_format format =
@@ -820,11 +837,9 @@ let pp_summary summary fname summary_format_list =
   Summary.print_summary_dot_svg summary fname
 
 let pp_summary_by_report_kind formats_by_report_kind summary fname error_filter linereader stats
-    file =
+    file issues_acc =
   let pp_summary_by_report_kind (report_kind, format_list) =
     match (report_kind, format_list) with
-    | Issues, _ :: _
-     -> pp_issues error_filter linereader summary format_list
     | Procs, _ :: _
      -> pp_procs summary format_list
     | Stats, _ :: _
@@ -836,7 +851,7 @@ let pp_summary_by_report_kind formats_by_report_kind summary fname error_filter
     | _
      -> ()
   in
-  List.iter ~f:pp_summary_by_report_kind formats_by_report_kind
+  List.iter ~f:pp_summary_by_report_kind formats_by_report_kind ; collect_issues summary issues_acc
 
 let pp_json_report_by_report_kind formats_by_report_kind fname =
   match Utils.read_file fname with
@@ -888,15 +903,19 @@ let pp_lint_issues filters formats_by_report_kind linereader procname error_log
   pp_lint_issues_by_report_kind formats_by_report_kind error_filter linereader procname error_log
 
 (** Process a summary *)
-let process_summary filters formats_by_report_kind linereader stats (fname, summary) =
+let process_summary filters formats_by_report_kind linereader stats fname summary issues_acc =
   let file = summary.Specs.attributes.ProcAttributes.loc.Location.file in
   let proc_name = Specs.get_proc_name summary in
   let error_filter = error_filter filters proc_name in
   let pp_simple_saved = !Config.pp_simple in
   Config.pp_simple := true ;
-  pp_summary_by_report_kind formats_by_report_kind summary fname error_filter linereader stats file ;
+  let issues_acc' =
+    pp_summary_by_report_kind formats_by_report_kind summary fname error_filter linereader stats
+      file issues_acc
+  in
   if Config.precondition_stats then PreconditionStats.do_summary proc_name summary ;
-  Config.pp_simple := pp_simple_saved
+  Config.pp_simple := pp_simple_saved ;
+  issues_acc'
 
 module AnalysisResults = struct
   type t = (string * Specs.summary) list
@@ -1070,33 +1089,43 @@ let finalize_and_close_files format_list_by_kind stats pdflatex =
   in
   List.iter ~f:close_files_of_report_kind format_list_by_kind
 
-let pp_summary_and_issues formats_by_report_kind =
+let pp_summary_and_issues formats_by_report_kind issue_formats =
   let pdflatex fname = ignore (Sys.command ("pdflatex " ^ fname)) in
   let stats = Stats.create () in
   let linereader = Printer.LineReader.create () in
   let filters = Inferconfig.create_filters Config.analyzer in
   let iterate_summaries = AnalysisResults.get_summary_iterator () in
-  iterate_summaries (process_summary filters formats_by_report_kind linereader stats) ;
+  let all_issues = ref [] in
+  iterate_summaries (fun (filename, summary) ->
+      all_issues
+      := process_summary filters formats_by_report_kind linereader stats filename summary
+           !all_issues ) ;
+  List.iter
+    ~f:(fun (procname, _, _, _ as issue) ->
+      let error_filter = error_filter filters procname in
+      List.iter
+        ~f:(fun issue_format -> pp_issue_in_format issue_format error_filter issue)
+        issue_formats)
+    (List.rev !all_issues) ;
   if Config.precondition_stats then PreconditionStats.pp_stats () ;
   LintIssues.load_issues_to_errlog_map Config.lint_issues_dir_name ;
   Typ.Procname.Map.iter (pp_lint_issues filters formats_by_report_kind linereader)
     !LintIssues.errLogMap ;
   finalize_and_close_files formats_by_report_kind stats pdflatex
 
-let print_issues formats_by_report_kind =
-  init_files formats_by_report_kind ;
-  match Config.from_json_report with
-  | Some fname
-   -> pp_json_report_by_report_kind formats_by_report_kind fname
-  | None
-   -> pp_summary_and_issues formats_by_report_kind
-
 let main ~report_csv ~report_json =
+  let issue_formats = init_issues_format_list report_csv report_json in
   let formats_by_report_kind =
-    [ (Issues, init_issues_format_list report_csv report_json)
+    [ (Issues, issue_formats)
     ; (Procs, init_procs_format_list ())
     ; (Calls, init_calls_format_list ())
     ; (Stats, init_stats_format_list ())
     ; (Summary, init_summary_format_list ()) ]
   in
-  register_perf_stats_report () ; print_issues formats_by_report_kind
+  register_perf_stats_report () ;
+  init_files formats_by_report_kind ;
+  match Config.from_json_report with
+  | Some fname
+   -> pp_json_report_by_report_kind formats_by_report_kind fname
+  | None
+   -> pp_summary_and_issues formats_by_report_kind issue_formats