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    SubjectRe: [PATCH tracing/kprobes v2 1/5] tracing/kprobes: Rename special variables syntax
    Frederic Weisbecker wrote:
    >> - @global-symbol
    >
    >
    > We could use global-symbol as is. Shadowing between global
    > and local vars could be dealt with scope resolution:
    >
    > function:var
    > file:var
    > file:line:var
    >
    > And throw errors while submitting a shadowed var name, crying until
    > the user defines the scope, only if needed of course (if there are
    > no shadowing detected, we can submit a naked variable name).

    Sure, via perf-probe, global/local symbols will be translated into
    @address by debuginfo.
    But without debuginfo, we still need @symbol syntax for accessing
    global defined symbols.

    >> - +|-Offs(ARG)
    >
    > You mean for arg numbers?
    > So we would have +1 for argument 1?

    Sorry for confusing you, it is for deref syntax.

    > arg(1) looks more easy to remember and to understand, no?

    I think arg(N) seems a bit different from other parts.
    Perhaps, %argumentN is possible ? :-)

    Thank you,

    --
    Masami Hiramatsu

    Software Engineer
    Hitachi Computer Products (America), Inc.
    Software Solutions Division

    e-mail: mhiramat@redhat.com



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