17.19.1. Linux Test Project
Tests a lot of Linux and POSIX userland visible interfaces.
Buildroot already has a package, so it is trivial to build it:
./build-buildroot --config 'BR2_PACKAGE_LTP_TESTSUITE=y'
So now let’s try and see if the exit system call is working:
/usr/lib/ltp-testsuite/testcases/bin/exit01
which gives successful output:
exit01 1 TPASS : exit() test PASSED
and has source code at: https://github.com/linux-test-project/ltp/blob/20190115/testcases/kernel/syscalls/exit/exit01.c
Besides testing any kernel modifications you make, LTP can also be used to the system call implementation of User mode simulation as shown at User mode Buildroot executables:
./run --userland "$(./getvar buildroot_target_dir)/usr/lib/ltp-testsuite/testcases/bin/exit01"
Tested at: 287c83f3f99db8c1ff9bbc85a79576da6a78e986 + 1.