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Date: Thu, 17 Jan 2019 10:25:24 +0000 From: Nick Clifton <nickc@...hat.com> To: Arnaldo Carvalho de Melo <acme@...nel.org> Cc: Namhyung Kim <namhyung@...nel.org>, Jiri Olsa <jolsa@...nel.org>, lkml <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...nel.org>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Michael Petlan <mpetlan@...hat.com>, Masami Hiramatsu <mhiramat@...nel.org>, kernel-team@....com Subject: Re: [RFC] perf tools: Filter out hidden symbols from labels Hi Arnaldo, >>> Humm, is -fno-omit-frame-pointer there by any chance? :-) > Would be interestint to have that info, as we could hint the user that > backtraces should be done with something else than '--call-graph fp' :-) OK, well I have added the feature to annobin 8.67, now in Fedora rawhide. Unfortunately it will take a while before the information actually gets into binaries, since the new data is only recorded when a package is rebuilt. So basically you are looking at Fedora 30 at the earliest. If you want to see the plugin in action, build something on a rawhide system (or a mock chroot) using the gcc command line option -fplugin=annobin. (Make sure that you have annobin-8.67 installed). Then once the binary is built run "readelf --wide --notes <file> | grep omit" to see the omit-frame-pointer notes. Cheers Nick
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