Do not read gcda files multiple times (PR gcov-profile/87069).

2018-08-27  Martin Liska  <mliska@suse.cz>

        PR gcov-profile/87069
	* gcov.c (process_file): Record files already processed
        and warn about a file being processed multiple times.

From-SVN: r263871

1 files changed, 15 insertions, 0 deletions

diff --git a/gcc/gcov.c b/gcc/gcov.c
index 43dfc9a..ff4020c 100644
--- a/gcc/gcov.c
+++ b/gcc/gcov.c
@@ -408,6 +408,10 @@ static vector<source_info> sources;
 /* Mapping of file names to sources */
 static vector<name_map> names;
 
+/* Record all processed files in order to warn about
+   a file being read multiple times.  */
+static vector<char *> processed_files;
+
 /* This holds data summary information.  */
 
 static unsigned object_runs;
@@ -1146,6 +1150,17 @@ static void
 process_file (const char *file_name)
 {
   create_file_names (file_name);
+
+  for (unsigned i = 0; i < processed_files.size (); i++)
+    if (strcmp (da_file_name, processed_files[i]) == 0)
+      {
+	fnotice (stderr, "'%s' file is already processed\n",
+		 file_name);
+	return;
+      }
+
+  processed_files.push_back (xstrdup (da_file_name));
+
   read_graph_file ();
   read_count_file ();
 }