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0bf9c7660f
tcp*.bt scripts tried to include glibc headers, which didn't work on nixos because bpftrace tried to call clang-major with some options to get the paths, but we never told it where to find it. Give bpftrace the path directly instead of giving it a path to clang. runqlat.bt doesn't work with glibc headers and requires kernel headers which are no longer extracted, just provide its value. Note the default clang output also had some clang-internal headers, but these seem to be included anyway through libclang API without having to give them here, so we only pass the glibc ones. While here: - also backport another bpftrace patch that made the tcp*.bt tools to actually not require these includes - and add tests that we can include these. Co-authored-by: Arian van Putten <arian.vanputten@gmail.com>
40 lines
1.5 KiB
Nix
40 lines
1.5 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\\n\"); 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\\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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