nixpkgs/nixos/tests/bpf.nix
2022-03-28 14:11:58 +02:00

30 lines
998 B
Nix

import ./make-test-python.nix ({ pkgs, ... }: {
name = "bpf";
meta.maintainers = with pkgs.lib.maintainers; [ martinetd ];
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() "
"}'"))
'';
})