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From:   Milian Wolff <milian.wolff@kdab.com>
To:     Jiri Olsa <jolsa@redhat.com>,
        ahmadkhorrami <ahmadkhorrami@ut.ac.ir>
Cc:     Steven Rostedt <rostedt@goodmis.org>,
        Arnaldo Carvalho de Melo <acme@redhat.com>,
        Linux-trace Users <linux-trace-users@vger.kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        linux-trace-users-owner@vger.kernel.org,
        Jin Yao <yao.jin@linux.intel.com>,
        Namhyung Kim <namhyung@kernel.org>,
        Andi Kleen <ak@linux.intel.com>
Subject: Re: Wrong Perf Backtraces
Date:   Sun, 29 Mar 2020 15:50:57 +0200
Message-ID: <1867036.PIDvDuAF1L@agathebauer>
Organization: KDAB
In-Reply-To: <ff979b3fffc8222d8da848b8cb92f77c@ut.ac.ir>
References: <821540886fc57d7749edee585a50602f@ut.ac.ir>
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On Sonntag, 29. M=E4rz 2020 14:39:33 CEST ahmadkhorrami wrote:
> Thanks. I did both of your changes. Perhaps some outputs are revised.
> But I still have repeated function calls and the script detects them.
> Here is one of them when the sampling period is 1000 events:

<snip>

> Here, we have two consecutive "7f91788120b5
> gtk_widget_propagate_state+0x195
> (/usr/lib/x86_64-linux-gnu/libgtk-3.so.0.2200.30) gtkwidget.c:0" lines,
> while "gtk_widget_propagate_state+0x195" is not recursive. It should
> call "gtk_container_forall", which does not occur even after the second
> (inner) call.

Potentially you are just lacking some debug symbols here for this GTK libra=
ry.=20
note that "gtkwidget.c:0" is bogus already - the line numbers start with 1,=
 so=20
a line of 0 reported indicates a lack of (full) debug information for this=
=20
file.

Cheers

=2D-=20
Milian Wolff | milian.wolff@kdab.com | Senior Software Engineer
KDAB (Deutschland) GmbH, a KDAB Group company
Tel: +49-30-521325470
KDAB - The Qt, C++ and OpenGL Experts
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