[S] Change in flashrom[master]: tests: Add workaround to allow tests mock fileno on FreeBSD

[Anastasia Klimchuk (Code Review)]

Anastasia Klimchuk has uploaded this change for review. ( https://review.coreboot.org/c/flashrom/+/67312 )

Change subject: tests: Add workaround to allow tests mock fileno on FreeBSD
......................................................................

tests: Add workaround to allow tests mock fileno on FreeBSD

fileno can be a function and a macro in FreeBSD, depending on whether
the environment in multi-threaded or single-threaded. For single
thread, macro is used. Macro is expanded into a inline code which
accesses private field of file descriptor. This is impossible to
mock in tests.

Pretending that environment is multi-threaded makes fileno function
to be called instead of a macro. Function can be mocked for tests.

Change-Id: I3789ea9107a4cf8033cf59bb96d3c82aa58de026
Signed-off-by: Anastasia Klimchuk 
---
M tests/chip.c
1 file changed, 35 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/12/67312/1

diff --git a/tests/chip.c b/tests/chip.c
index 6f03172..7b2bd82 100644
--- a/tests/chip.c
+++ b/tests/chip.c
@@ -131,6 +131,17 @@
    /* Assignment below normally happens while probing, but this test is not probing. */
    flashctx->mst = &registered_masters[0];
    printf("done\n");
+
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+	/*
+	 * Pretending to be a multithreaded environment so that `fileno`
+	 * is called as a function (and not as a macro).
+	 * fileno macro in FreeBSD is expanded into inline access of
+	 * private field of file descriptor, which is impossible to mock.
+	 * Calling fileno as a function allows the test to mock it.
+	 */
+	__isthreaded = 1;
+#endif
 }

static void teardown(struct flashrom_layout **layout)
@@ -144,6 +155,11 @@
    printf("done\n");

io_mock_register(NULL);
+
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+	/* Restoring the state, see comment in setup_chip. */
+	__isthreaded = 0;
+#endif
 }

static const struct flashchip chip_8MiB = {