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From: Stan Cox <scox@redhat.com>
To: Craig Ringer <craig@2ndquadrant.com>, systemtap@sourceware.org
Cc: "Frank Ch. Eigler" <fche@redhat.com>
Subject: Re: Emitting marker names instead of hex statement addresses for SDT probes?
Date: Tue, 19 Jan 2021 17:21:40 -0500	[thread overview]
Message-ID: <7de6169c-2235-4022-6fad-f07f0edadfa0@redhat.com> (raw)
In-Reply-To: <CAMsr+YFZPEPqS+qoPNLTd3q8gBs9f29nXMd5k4Ouzhj8G5RSkg@mail.gmail.com>

If I use --dyninst (which creates a probe source that is easy to modify 
and rebuild to try quick experiments) then this change forces the probe 
point name:
  #define STP_NEED_PROBE_NAME=1
  changed in enter_dyninst_uprobe:
  c->probe_point = sup->probe->pn; /* was ->pp */

% stapdyn *.so -c /work/scox/stap/sdt/tstclass.x
process("/work/scox/stap/sdt/tstclass.x").mark("test_probe_4") aa=0xa 
string1=abc
10 20 abc xyz
10 20 abc xyz

(where the original probe was doing: printf("%s aa=%#lx 
string1=%s\n",pp(),@cast($arg1,"struct A")->aa, ...)


  reply	other threads:[~2021-01-19 22:21 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-13  4:49 Craig Ringer
2021-01-19 22:21 ` Stan Cox [this message]
2021-01-21  5:47   ` Craig Ringer

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