Improve JSON format: add function names for lines.

2019-03-11  Martin Liska  <mliska@suse.cz>

	* gcov.c (output_intermediate_json_line): Print function
	name of each line.
	(output_json_intermediate_file): Add new argument.
	* doc/gcov.texi: Document the change.

From-SVN: r269581

1 files changed, 16 insertions, 4 deletions

diff --git a/gcc/gcov.c b/gcc/gcov.c
index 9e27a82..37e787a 100644
--- a/gcc/gcov.c
+++ b/gcc/gcov.c
@@ -1041,17 +1041,21 @@ process_args (int argc, char **argv)
   return optind;
 }
 
-/* Output intermediate LINE sitting on LINE_NUM to JSON OBJECT.  */
+/* Output intermediate LINE sitting on LINE_NUM to JSON OBJECT.
+   Add FUNCTION_NAME to the LINE.  */
 
 static void
 output_intermediate_json_line (json::array *object,
-			       line_info *line, unsigned line_num)
+			       line_info *line, unsigned line_num,
+			       const char *function_name)
 {
   if (!line->exists)
     return;
 
   json::object *lineo = new json::object ();
   lineo->set ("line_number", new json::number (line_num));
+  if (function_name != NULL)
+    lineo->set ("function_name", new json::string (function_name));
   lineo->set ("count", new json::number (line->count));
   lineo->set ("unexecuted_block",
 	      new json::literal (line->has_unexecuted_block));
@@ -1141,6 +1145,8 @@ output_json_intermediate_file (json::array *json_files, source_info *src)
   json::array *lineso = new json::array ();
   root->set ("lines", lineso);
 
+  function_info *last_non_group_fn = NULL;
+
   for (unsigned line_num = 1; line_num <= src->lines.size (); line_num++)
     {
       vector<function_info *> *fns = src->get_functions_at_location (line_num);
@@ -1150,17 +1156,23 @@ output_json_intermediate_file (json::array *json_files, source_info *src)
 	for (vector<function_info *>::iterator it2 = fns->begin ();
 	     it2 != fns->end (); it2++)
 	  {
+	    if (!(*it2)->is_group)
+	      last_non_group_fn = *it2;
+
 	    vector<line_info> &lines = (*it2)->lines;
 	    for (unsigned i = 0; i < lines.size (); i++)
 	      {
 		line_info *line = &lines[i];
-		output_intermediate_json_line (lineso, line, line_num + i);
+		output_intermediate_json_line (lineso, line, line_num + i,
+					       (*it2)->m_name);
 	      }
 	  }
 
       /* Follow with lines associated with the source file.  */
       if (line_num < src->lines.size ())
-	output_intermediate_json_line (lineso, &src->lines[line_num], line_num);
+	output_intermediate_json_line (lineso, &src->lines[line_num], line_num,
+				       (last_non_group_fn != NULL
+					? last_non_group_fn->m_name : NULL));
     }
 }