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fd5d7b2586
bpftrace 0.17 added module BTF support, check this works. On bpftrace 0.16, this failed with the following error: > ERROR: kfunc:nft_trans_alloc_gfp: no BTF data for the function
34 lines
1.2 KiB
Nix
34 lines
1.2 KiB
Nix
import ./make-test-python.nix ({ pkgs, ... }: {
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name = "bpf";
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meta.maintainers = with pkgs.lib.maintainers; [ martinetd ];
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nodes.machine = { pkgs, ... }: {
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programs.bcc.enable = true;
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environment.systemPackages = with pkgs; [ bpftrace ];
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};
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testScript = ''
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## bcc
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# syscount -d 1 stops 1s after probe started so is good for that
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print(machine.succeed("syscount -d 1"))
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## bpftrace
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# list probes
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machine.succeed("bpftrace -l")
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# simple BEGIN probe (user probe on bpftrace itself)
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print(machine.succeed("bpftrace -e 'BEGIN { print(\"ok\"); exit(); }'"))
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# tracepoint
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print(machine.succeed("bpftrace -e 'tracepoint:syscalls:sys_enter_* { print(probe); exit() }'"))
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# kprobe
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print(machine.succeed("bpftrace -e 'kprobe:schedule { print(probe); exit() }'"))
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# BTF
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print(machine.succeed("bpftrace -e 'kprobe:schedule { "
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" printf(\"tgid: %d\", ((struct task_struct*) curtask)->tgid); exit() "
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"}'"))
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# module BTF (bpftrace >= 0.17)
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print(machine.succeed("bpftrace -e 'kfunc:nft_trans_alloc_gfp { "
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" printf(\"portid: %d\\n\",args->ctx->portid); "
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"} BEGIN { exit() }'"))
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'';
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})
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