@@ -25,7 +25,13 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
-/* Coverage information is held in two files. A notes file, which is
+/* CAVEAT: Coverage information files should not be parsed directly, but
+ we would rather recommend using `gcov --json-format` that provides
+ a machine readable coverage information.
+
+ Note that the following file format documentation can be outdated.
+
+ Coverage information is held in two files. A notes file, which is
generated by the compiler, and a data file, which is generated by
the program under test. Both files use a similar structure. We do
not attempt to make these files backwards compatible with previous