nixpkgs/nixos/tests/bpf.nix

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import ./make-test-python.nix ({ pkgs, ... }: {
name = "bpf";
meta.maintainers = with pkgs.lib.maintainers; [ martinetd ];
2022-03-20 23:15:30 +00:00
nodes.machine = { pkgs, ... }: {
programs.bcc.enable = true;
environment.systemPackages = with pkgs; [ bpftrace ];
};
testScript = ''
## bcc
# syscount -d 1 stops 1s after probe started so is good for that
print(machine.succeed("syscount -d 1"))
## bpftrace
# list probes
machine.succeed("bpftrace -l")
# simple BEGIN probe (user probe on bpftrace itself)
print(machine.succeed("bpftrace -e 'BEGIN { print(\"ok\"); exit(); }'"))
# tracepoint
print(machine.succeed("bpftrace -e 'tracepoint:syscalls:sys_enter_* { print(probe); exit() }'"))
# kprobe
print(machine.succeed("bpftrace -e 'kprobe:schedule { print(probe); exit() }'"))
# BTF
print(machine.succeed("bpftrace -e 'kprobe:schedule { "
" printf(\"tgid: %d\", ((struct task_struct*) curtask)->tgid); exit() "
"}'"))
# module BTF (bpftrace >= 0.17)
# test is currently disabled on aarch64 as kfunc does not work there yet
# https://github.com/iovisor/bpftrace/issues/2496
print(machine.succeed("uname -m | grep aarch64 || "
"bpftrace -e 'kfunc:nft_trans_alloc_gfp { "
" printf(\"portid: %d\\n\", args->ctx->portid); "
"} BEGIN { exit() }'"))
'';
})