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From: Yeshpal Jain <jainyeshpal@gmail.com>
Date: Sun, 7 Aug 2022 21:39:23 +0530
Message-ID: <CAH67PmMAQjodRctsCo+V1t83oyNnmJ+AgqpeWsoRVS8DCszSwA@mail.gmail.com>
Subject: Run system tap with a user defined function
To: systemtap@sourceware.org
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I want to run a user defined function inside one of the function probes.
for ex :
#! /usr/bin/env stap


function __read_phase:long(phase:long) %{ /* pure */
        struct phase *phase_s =3D (struct phase *)((long)STAP_ARG_phase);
        int phase_st =3D phase->p_state;
        STAP_RETURN(phase_st);
%} /* <-- function body */

function trace_phase(entry_p, extra) {
  %( $# > 1 %? if (tid() in trace) %)
                  printf("%s%s%s %s phase =3D %d\n",
                                  thread_indent (entry_p),
                                  (entry_p>0?"->":"<-"),
                                  ppfunc (),
                                  extra, __read_phase($fom))

}

probe process("/root/test/.libs/mylib.so").function("*_test_func").call   {
trace_phase(1, $$parms) }

i am running stap with -g option,
when i compile i am getting error,
error: dereferencing pointer to incomplete type =E2=80=98struct phase=E2=80=
=99
struct phase is a structure defined in mylibrary,
Is there a way to include custom directory/headers while generating system
tap.

--=20
Thanks and Regards,
Yeshpal Jain.