[linters] Specify path in linters

Reviewed By: jvillard

Differential Revision: D5146904

fbshipit-source-id: 62b9d78

infer/src/clang/ALVar.ml

@@ -14,6 +14,7 @@ type keyword =
   | Suggestion
   | Severity
   | Mode
+  | Path
 
 type formula_id = Formula_id of string[@@deriving compare]
 
@@ -46,6 +47,7 @@ let keyword_to_string k =
   | Suggestion -> "suggestion"
   | Severity -> "severity"
   | Mode -> "mode"
+  | Path -> "path"
 
 let is_report_when_keyword k =
   match k with
@@ -72,6 +74,11 @@ let is_mode_keyword k =
   | Mode -> true
   | _ -> false
 
+let is_path_keyword k =
+  match k with
+  | Path -> true
+  | _ -> false
+
 (* true if and only if a substring of container matches the regular
    expression defined by contained
 *)

infer/src/clang/ALVar.mli

@@ -14,6 +14,7 @@ type keyword =
   | Suggestion
   | Severity
   | Mode
+  | Path
 
 type formula_id = Formula_id of string
 
@@ -43,6 +44,10 @@ val is_severity_keyword : keyword -> bool
 
 val is_mode_keyword : keyword -> bool
 
+val is_path_keyword : keyword -> bool
+
+val str_match_regex : string -> string -> bool
+
 val compare_str_with_alexp : string -> alexp -> bool
 
 module FormulaIdMap : Caml.Map.S with type key = formula_id

infer/src/clang/cFrontend_checkers_main.ml

@@ -256,7 +256,8 @@ let do_frontend_checks (trans_unit_ctx: CFrontend_config.translation_unit_contex
   CTL.create_ctl_evaluation_tracker trans_unit_ctx.source_file;
   try
     let parsed_linters = parse_ctl_files Config.linters_def_file in
-    let filtered_parsed_linters = CFrontend_errors.filter_parsed_linters parsed_linters in
+    let filtered_parsed_linters =
+      CFrontend_errors.filter_parsed_linters parsed_linters trans_unit_ctx.source_file in
     CFrontend_errors.parsed_linters := filtered_parsed_linters;
     let source_file = trans_unit_ctx.CFrontend_config.source_file in
     Logging.out "Start linting file %a with rules: @\n%s@\n"

infer/src/clang/cFrontend_errors.ml

@@ -15,10 +15,11 @@ type linter = {
   condition : CTL.t;
   issue_desc : CIssue.issue_desc;
   def_file : string option;
+  path : string option;
 }
 
 (* If in linter developer mode and if current linter was passed, filter it out *)
-let filter_parsed_linters parsed_linters =
+let filter_parsed_linters_developer parsed_linters =
   if List.length parsed_linters > 1 && Config.linters_developer_mode then
     match Config.linter with
     | None ->
@@ -31,6 +32,17 @@ let filter_parsed_linters parsed_linters =
         ) parsed_linters
   else parsed_linters
 
+let filter_parsed_linters_by_path parsed_linters source_file =
+  let filter_parsed_linter_by_path linter =
+    match linter.path with
+    | Some path -> ALVar.str_match_regex (SourceFile.to_rel_path source_file) path
+    | None -> true in
+  List.filter ~f:filter_parsed_linter_by_path parsed_linters
+
+let filter_parsed_linters parsed_linters source_file =
+  let linters = filter_parsed_linters_developer parsed_linters in
+  filter_parsed_linters_by_path linters source_file
+
 let linters_to_string linters =
   let linter_to_string linters =
     List.map ~f:(fun (rule : linter) -> rule.issue_desc.name) linters  in
@@ -126,39 +138,47 @@ let string_to_issue_mode m =
       (Logging.out "\n[ERROR] Mode %s does not exist. Please specify ON/OFF\n" s;
        assert false)
 
+let string_to_path path = Some path
+
 (** Convert a parsed checker in list of linters *)
 let create_parsed_linters linters_def_file checkers : linter list =
   let open CIssue in
   let open CTL in
   Logging.out "\n Converting checkers in (condition, issue) pairs\n";
-  let do_one_checker c =
+  let do_one_checker checker : linter =
     let dummy_issue = {
-      name = c.name;
+      name = checker.name;
       description = "";
       suggestion = None;
       loc = Location.dummy;
       severity = Exceptions.Kwarning;
       mode = CIssue.On;
     } in
-    let issue_desc, condition = List.fold ~f:(fun (issue', cond') d  ->
-        match d with
+    let issue_desc, condition, path =
+      let process_linter_definitions (issue, cond, path) description =
+        match description with
         | CSet (av, phi) when ALVar.is_report_when_keyword av ->
-            issue', phi
+            issue, phi, path
         | CDesc (av, msg) when ALVar.is_message_keyword av ->
-            {issue' with description = msg}, cond'
+            {issue with description = msg}, cond, path
         | CDesc (av, sugg) when ALVar.is_suggestion_keyword av ->
-            {issue' with suggestion = Some sugg}, cond'
+            {issue with suggestion = Some sugg}, cond, path
         | CDesc (av, sev) when ALVar.is_severity_keyword  av ->
-            {issue' with severity = string_to_err_kind sev}, cond'
+            {issue with severity = string_to_err_kind sev}, cond, path
         | CDesc (av, m) when ALVar.is_mode_keyword  av ->
-            {issue' with mode = string_to_issue_mode m }, cond'
-        | _ -> issue', cond') ~init:(dummy_issue, CTL.False) c.definitions in
-    if Config.debug_mode then (
+            {issue with mode = string_to_issue_mode m }, cond, path
+        | CDesc (av, path') when ALVar.is_path_keyword av ->
+            issue, cond, string_to_path path'
+        | _ -> issue, cond, path in
+      List.fold
+        ~f:process_linter_definitions
+        ~init:(dummy_issue, CTL.False, None)
+        checker.definitions in
     Logging.out "\nMaking condition and issue desc for checker '%s'\n"
-        c.name;
+      checker.name;
     Logging.out "\nCondition =\n     %a\n" CTL.Debug.pp_formula condition;
-      Logging.out "\nIssue_desc = %a\n" CIssue.pp_issue issue_desc);
-    {condition; issue_desc; def_file = Some linters_def_file} in
+    Logging.out "\nIssue_desc = %a\n" CIssue.pp_issue issue_desc;
+    {condition; issue_desc; def_file = Some linters_def_file; path;} in
   List.map ~f:do_one_checker checkers
 
 let rec apply_substitution f sub =

infer/src/clang/cFrontend_errors.mli

@@ -13,9 +13,10 @@ type linter = {
   condition : CTL.t;
   issue_desc : CIssue.issue_desc;
   def_file : string option;
+  path : string option;
 }
 
-val filter_parsed_linters : linter list -> linter list
+val filter_parsed_linters : linter list -> SourceFile.t -> linter list
 
 val linters_to_string : linter list -> string
 

infer/src/clang/ctl_parser.mly

@@ -148,8 +148,10 @@ clause:
       | "suggestion" -> ALVar.Suggestion
       | "severity" -> ALVar.Severity
       | "mode" -> ALVar.Mode
-      | _ -> failwith ("[ERROR] string '%s' cannot be set in a SET clause. " ^
-                        "Use either of: 'message', 'suggestion', 'severity', or 'mode'\n") in
+      | "path" -> ALVar.Path
+      | _ -> IStd.failwithf "[ERROR] string '%s' cannot be set in a SET clause. \
+                        Use either of: \
+                        'message', 'mode', 'severity', 'suggestion' or 'path'" $2 in
       CTL.CDesc (alvar, $4) }
     | let_clause { $1 }
     ;

infer/src/clang/ctl_parser_types.ml

@@ -38,11 +38,6 @@ let ast_node_name an =
   | _ -> ""
 
 let infer_prefix = "__infer_ctl_"
-let report_when_const = "report_when"
-let message_const = "message"
-let suggestion_const = "suggestion"
-let severity_const = "severity"
-let mode_const = "mode"
 
 exception ALParsingException of string
 

infer/src/clang/ctl_parser_types.mli

@@ -21,11 +21,6 @@ val ast_node_type : ast_node -> string
 exception ALParsingException of string
 
 val infer_prefix : string
-val report_when_const : string
-val message_const : string
-val suggestion_const : string
-val severity_const : string
-val mode_const : string
 
 (** Data structures for type parser.
     Correspondence with clang types inferred from

infer/tests/codetoanalyze/objc/linters-for-test-only/filter_by_path/include_file.m

@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2017 - present Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+int main() { return 0; }

infer/tests/codetoanalyze/objc/linters-for-test-only/issues.exp

@@ -1,3 +1,8 @@
+codetoanalyze/objc/linters-for-test-only/filter_by_path/include_file.m, main, 9, ALL_PATH_NO_FILTER_EXAMPLE, []
+codetoanalyze/objc/linters-for-test-only/filter_by_path/include_file.m, main, 9, FILTER_BY_ALL_PATH_EXAMPLE, []
+codetoanalyze/objc/linters-for-test-only/filter_by_path/include_file.m, main, 9, FILTER_BY_PATH_EXAMPLE, []
+codetoanalyze/objc/linters-for-test-only/implicit_cast.c, main, 9, ALL_PATH_NO_FILTER_EXAMPLE, []
+codetoanalyze/objc/linters-for-test-only/implicit_cast.c, main, 9, FILTER_BY_ALL_PATH_EXAMPLE, []
 codetoanalyze/objc/linters-for-test-only/implicit_cast.c, main, 10, TEST_VAR_TYPE_CHECK, []
 codetoanalyze/objc/linters-for-test-only/implicit_cast.c, main, 11, TEST_IMPLICIT_CAST_CHECK, []
 codetoanalyze/objc/linters-for-test-only/implicit_cast.c, main, 11, TEST_VAR_TYPE_CHECK, []

infer/tests/codetoanalyze/objc/linters-for-test-only/linters_example.al

@@ -215,3 +215,26 @@ DEFINE-CHECKER TEST_NAMESPACE_NAME = {
   SET message = "Found a namespace with name....";
 
 };
+
+DEFINE-CHECKER FILTER_BY_PATH_EXAMPLE = {
+  SET report_when =
+     WHEN declaration_has_name("main")
+     HOLDS-IN-NODE FunctionDecl;
+  SET message = "Found main method";
+  SET path = "codetoanalyze/objc/linters-for-test-only/filter_by_path/.*";
+};
+
+DEFINE-CHECKER ALL_PATH_NO_FILTER_EXAMPLE = {
+  SET report_when =
+     WHEN declaration_has_name("main")
+     HOLDS-IN-NODE FunctionDecl;
+  SET message = "Found main method";
+};
+
+DEFINE-CHECKER FILTER_BY_ALL_PATH_EXAMPLE = {
+  SET report_when =
+     WHEN declaration_has_name("main")
+     HOLDS-IN-NODE FunctionDecl;
+  SET message = "Found main method";
+  SET path = ".*";
+};