[Python-Dev] Making the new dtrace support work on OS X

[David Cournapeau]

On Fri, Jan 13, 2017 at 9:12 PM, Lukasz Langa <lukasz at langa.pl> wrote:

> Looks like function-entry and function-return give you the C-level frame
> names for some reason. This was implemented on OS X 10.11 if that makes any
> difference. I will look at this in the evening, the laptop I'm on now is
> macOS Sierra with SIP which cripples dtrace.
>

On that hint, I tried on OSX 11.1. sw_vers says

ProductName: Mac OS X
ProductVersion: 10.11.6
BuildVersion: 15G1108

And there, the example worked as advertised w/ my build of 3.6.0. I will
try on more versions of OS X in our test lab.

David

>
> On Jan 12, 2017, at 5:08 AM, David Cournapeau <cournape at gmail.com> wrote:
>
> Hi,
>
> I was excited to see official dtrace support for python 3.6.0 on OS X, but
> I have not been able to make it work:
>
> 1. I built my own python from sources on OS X 10.9,  with the
> --with-dtrace support
> 2. if I launch `python3.6 -q &` and then `sudo dtrace -l -P python$!`, I
> get the following output:
>
>    ID   PROVIDER            MODULE                          FUNCTION NAME
>  2774 python48084         python3.6          _PyEval_EvalFrameDefault
> function-entry
>  2775 python48084         python3.6          _PyEval_EvalFrameDefault
> function-return
>  2776 python48084         python3.6                           collect
> gc-done
>  2777 python48084         python3.6                           collect
> gc-start
>  2778 python48084         python3.6          _PyEval_EvalFrameDefault line
>
> Which looks similar but not the same as the example given in the doc at
> https://docs.python.org/dev/howto/instrumentation.
> html#enabling-the-static-markers
>
> 3. When I try to test anything with the given call_stack.d example, I
> can't make it work at all:
>
> """
> # script.py
> def start():
>     foo()
>
> def foo():
>     pass
>
> start()
> """
>
> I am not very familiar with dtrace, so maybe I a missing a step, there is
> a documentation bug, or it depends on which OS X version you are using ?
>
> Thanks,
> David
> _______________________________________________
> Python-Dev mailing list
> Python-Dev at python.org
> https://mail.python.org/mailman/listinfo/python-dev
> Unsubscribe: https://mail.python.org/mailman/options/python-dev/
> lukasz%40langa.pl
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-dev/attachments/20170114/62906c49/attachment.html>