Re: [PATCH v11 net-next 12/12] bpf: mini eBPF library, test stubs and verifier testsuite

[Alexei Starovoitov]

On Wed, Sep 17, 2014 at 12:16 AM, Daniel Borkmann <dborkman@xxxxxxxxxx> wrote:
>
>
> That actually still doesn't answer my question why the test stub
> cannot live in lib/test_bpf where we have our actual testing
> framework for eBPF/BPF, also since you exactly only build test_stub.c
> when TEST_BPF is enabled which is the Kconfig for lib/test_bpf.

multiple reasons:
1.
lib/test_bpf.c is a module, whereas test_stub.c is kernel builtin.

2.
I wasn't sure that reusing CONFIG_TEST_BPF for this
purpose was a good idea. May be it's better to introduce
CONFIG_BPF_VERIFIER_TEST_STUBS or something.

3.
kernel/bpf/test_stubs.c can be removed once real tracing
or socket use case is in.
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