tests: Redirect to real I/O to support coverage run

Implement a check that redirects mock io functions to the real
implementations. Real I/O functions are needed for the coverage tool to
be able to create and write files.

BUG=None
BRANCH=None
TEST=None

Change-Id: I0817fce6ea0f53a4c127794a0d8246504675f805
Signed-off-by: Evan Benn <evanbenn@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/69539
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/tests/io_real.h b/tests/io_real.h
new file mode 100644
index 000000000..f2491c3ab
--- /dev/null
+++ b/tests/io_real.h
@@ -0,0 +1,24 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright 2022 Google LLC
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef IO_REAL_H
+#define IO_REAL_H
+
+/* Detect file io that should not be mocked, for example code coverage writing
+ * gcda files. Call io_mock_register with functions that defer to real io.
+ */
+void maybe_unmock_io(const char* pathname);
+
+#endif /* IO_REAL_H */