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27bb09b95e
This fixes build error due to updaded llvm. bpftrace 0.24.1 had a couple of regressions, so backport fix and temporarily raise ulimit in test. A better solution for ulimit will probably make it in 0.24.2 but that is likely harmless enough in practice so go ahead as is. Notes: - add new xxd build dep to fix build - INSTALL_TOOL_DOCS was removed, .txt files are now comments in scripts themselves - USE_SYSTEM_LIBBPF is optional right now but needed on master, just set it as there is no harm and next auto-update will be less work
48 lines
1.6 KiB
Nix
48 lines
1.6 KiB
Nix
{ lib, ... }:
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{
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name = "bpf";
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meta.maintainers = with lib.maintainers; [ martinetd ];
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nodes.machine =
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{ pkgs, ... }:
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{
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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\\n\"); exit(); }'"))
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# tracepoint
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# workaround: this needs more than the default of 1k FD to attach ~350 probes, bump fd limit
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# see https://github.com/bpftrace/bpftrace/issues/2110
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print(machine.succeed("""
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ulimit -n 2048
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bpftrace -e 'tracepoint:syscalls:sys_enter_* { print(probe); exit() }'
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"""))
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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\\n\", ((struct task_struct*) curtask)->tgid); exit() "
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"}'"))
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# module BTF (bpftrace >= 0.17)
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# test is currently disabled on aarch64 as kfunc does not work there yet
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# https://github.com/iovisor/bpftrace/issues/2496
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print(machine.succeed("uname -m | grep aarch64 || "
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"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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# glibc includes
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print(machine.succeed("bpftrace -e '#include <errno.h>\n"
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"BEGIN { printf(\"ok %d\\n\", EINVAL); exit(); }'"))
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'';
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}
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