From: Arun Sharma <asharma@fb.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: LKML <linux-kernel@vger.kernel.org>, Jiri Olsa <jolsa@redhat.com>,
Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
Benjamin Redelings <benjamin.redelings@nescent.org>,
Corey Ashford <cjashfor@linux.vnet.ibm.com>,
Cyrill Gorcunov <gorcunov@openvz.org>,
"Frank Ch. Eigler" <fche@redhat.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@elte.hu>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Paul Mackerras <paulus@samba.org>,
Robert Richter <robert.richter@amd.com>,
Stephane Eranian <eranian@google.com>,
Tom Zanussi <tzanussi@gmail.com>,
Ulrich Drepper <drepper@gmail.com>
Subject: Re: perf backtraces off-by-1
Date: Sun, 26 Aug 2012 10:52:51 -0700 [thread overview]
Message-ID: <503A6273.9090702@fb.com> (raw)
In-Reply-To: <1345997415.2296.0.camel@laptop>
On 8/26/12 9:10 AM, Peter Zijlstra wrote:
> On Fri, 2012-08-24 at 15:13 -0700, Arun Sharma wrote:
>
>> One option is to support
>> this for user mode only, with code to detect signal frames. Any other
>> ideas?
>>
> I guess we'd need to see what that patch would look like... :-)
>
It used to look like this:
http://git.savannah.gnu.org/gitweb/?p=libunwind.git;a=commitdiff;h=92cc7fd78a5a79c4bb5f85bfb7d7fb025df9cd5a
These days we just look at dwarf augmentation string:
http://git.savannah.gnu.org/gitweb/?p=libunwind.git;a=blob;f=src/dwarf/Gfde.c;h=8659624b0320c514057861a259b6efe1b605bbf3;hb=HEAD#l189
-Arun
next prev parent reply other threads:[~2012-08-26 17:53 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-24 22:13 perf backtraces off-by-1 Arun Sharma
2012-08-26 16:10 ` Peter Zijlstra
2012-08-26 17:52 ` Arun Sharma [this message]
2012-08-28 16:34 ` Peter Zijlstra
2012-08-28 17:33 ` Arun Sharma
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