test bpf tail calls #10117
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test bpf tail calls #10117
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Three tests are added: - invalidate_pkt_pointers_by_tail_call checks that one can use the packet pointer after a tail call. This was originally possible and also poses not problems, but was made impossible by 1a4607f. - invalidate_pkt_pointers_by_static_tail_call tests a corner case found by Eduard Zingerman during the discussion of the original fix, which was broken in that fix. - subprog_result_tail_call tests that precision propagation works correctly across tail calls. This did not work before. Signed-off-by: Martin Teichmann <[email protected]>
A new test is added: caller_stack_write_tail_call tests that the live stack is correctly tracked for a tail call.
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