linux-kernel - Re: perf-4.8.0-rc3: Segmentation fault

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Date:   Mon, 29 Aug 2016 11:44:50 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Alexey Dobriyan <adobriyan@...il.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        alexander.shishkin@...ux.intel.com,
        Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: perf-4.8.0-rc3: Segmentation fault

Em Thu, Aug 25, 2016 at 01:49:41PM +0300, Alexey Dobriyan escreveu:
> I profiled kernel allmodconfig build (don't ask) and perf tui reliably
> segfaults when trying to enter annotation mode for any of the
> individual functions. It segfaults immediately before even showing
> menu with choices.
> 
> perf: Segmentation fault
> -------- backtrace --------
> perf[0x5451fb]
> /lib64/libc.so.6(+0x33290)[0x7fcec0a80290]
> perf(__map__is_kernel+0x26)[0x4bbcd6]
> perf[0x54287c]
> perf(perf_evlist__tui_browse_hists+0x94)[0x543e84]
> perf(cmd_report+0x1a34)[0x434884]
> perf[0x478471]
> perf(main+0x6c6)[0x4237e6]
> /lib64/libc.so.6(__libc_start_main+0xf0)[0x7fcec0a6d630]
> perf(_start+0x29)[0x4238e9]
> 
> Steps to reproduce:
>     rm -rf ../xxx
>     mkdir ../xxx
>     make O=../xxx ARCH=x86_64 allmodconfig
>     perf record -e cycles make O=../xxx -k -j5
>     perf report
> 
> perf.data is 1.23 GB long , so be prepared.

Thanks for the report, trying to reproduce this.

- Arnaldo