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package generate
// kindMeta holds static metadata for a TracepointKind. Adding a new kind
// only requires registering an entry here — no switch statements need to be
// updated elsewhere (Open/Closed Principle).
type kindMeta struct {
// structName is the C struct name used in generated BPF handlers, e.g. "fd_event".
structName string
// enterAccepted reports whether this kind is valid for a syscall-enter tracepoint.
// Kinds that are exit-only (e.g. KindRet) must not appear on enter.
enterAccepted bool
}
// kindRegistry maps every known TracepointKind to its static metadata.
// To add a new syscall classification, add a single entry here; the rest of
// the code (isEnterRejected, eventStructName, eventTypeConstant) picks it up
// automatically via lookupKind.
var kindRegistry = map[TracepointKind]kindMeta{
KindFd: {structName: "fd_event", enterAccepted: true},
KindOpen: {structName: "open_event", enterAccepted: true},
KindPathname: {structName: "path_event", enterAccepted: true},
KindName: {structName: "name_event", enterAccepted: true},
KindRet: {structName: "ret_event", enterAccepted: false},
KindFcntl: {structName: "fcntl_event", enterAccepted: true},
KindNull: {structName: "null_event", enterAccepted: true},
KindDup3: {structName: "dup3_event", enterAccepted: true},
KindOpenByHandleAt: {structName: "open_by_handle_at_event", enterAccepted: true},
KindSocket: {structName: "socket_event", enterAccepted: true},
KindSocketpair: {structName: "socketpair_event", enterAccepted: true},
KindAccept: {structName: "accept_event", enterAccepted: true},
KindPipe: {structName: "pipe_event", enterAccepted: true},
KindEventfd: {structName: "eventfd_event", enterAccepted: true},
KindEpollCtl: {structName: "epoll_ctl_event", enterAccepted: true},
// KindNone is intentionally absent: it represents "unclassified" and is
// never enter-accepted. lookupKind returns the zero kindMeta (enterAccepted=false)
// for any unregistered kind, so KindNone is implicitly rejected.
}
// lookupKind returns the metadata for kind. If kind is not registered (e.g.
// KindNone or an unknown value), it returns a zero kindMeta whose structName
// is "unknown_event" and enterAccepted is false.
func lookupKind(kind TracepointKind) kindMeta {
if m, ok := kindRegistry[kind]; ok {
return m
}
return kindMeta{structName: "unknown_event", enterAccepted: false}
}
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