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tests: Detect gcov run and redirect to real I/O functions

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Code coverage writes data to disk, we need to use real io functions at
this point so that the data is really written.

BUG=b:187647884
BRANCH=None
TEST=meson test
TEST=ninja coverage

Change-Id: If06053ecd78e886c8f7fc55813f4b5635be78c6b
Signed-off-by: Evan Benn <evanbenn@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/69266
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Evan Benn 2022-11-04 17:00:40 +11:00 committed by Anastasia Klimchuk
parent 2c3bbd91e4
commit bcaaae15ae
2 changed files with 14 additions and 0 deletions
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12
Documentation/building.md
View File

@ -48,6 +48,18 @@ ninja -C builddir install
ninja -C builddir test
```
### Run unit tests with code coverage
#### gcov
Due to a bug in lcov, the html file will only be correct if lcov is not
installed and gcovr is installed. See
https://github.com/linux-test-project/lcov/issues/168
https://github.com/mesonbuild/meson/issues/6747
```
meson setup buildcov -Db_coverage=true
ninja -C buildcov test
ninja -C buildcov coverage
```
## System specific information
### Ubuntu / Debian (Linux)
* __linux-headers__ are version specific

2
tests/tests.c
View File

@ -17,6 +17,7 @@
#include "io_mock.h"
#include "tests.h"
#include "wraps.h"
#include "io_real.h"
#include <stdio.h>
#include <string.h>
@ -77,6 +78,7 @@ uint8_t __wrap_sio_read(uint16_t port, uint8_t reg)
static int mock_open(const char *pathname, int flags, mode_t mode)
{
maybe_unmock_io(pathname);
if (get_io() && get_io()->iom_open)
return get_io()->iom_open(get_io()->state, pathname, flags, mode);