From: Jan Kratochvil <jan.kratochvil@redhat.com>
To: Milian Wolff <mail@milianw.de>
Cc: elfutils-devel@sourceware.org, Mark Wielaard <mark@klomp.org>,
Ulf Hermann <ulf.hermann@qt.io>
Subject: Re: frame unwinding patches
Date: Mon, 03 Apr 2017 21:23:00 -0000 [thread overview]
Message-ID: <20170403212325.GA21599@host1.jankratochvil.net> (raw)
In-Reply-To: <3915502.JGE1jdPxOT@milian-kdab2>
On Mon, 03 Apr 2017 11:00:03 +0200, Milian Wolff wrote:
> I just got a report from a colleague. As-is, elfutils would fail to unwind
> from the following location in his application:
>
> 0x1137ca4
>
> With the x86_64 patch applied, he got a proper backtrace:
S/he has something wrong with the compiler. With -fasynchronous-unwind-tables
frame pointer unwinding is never needed
and gcc defaults to -fasynchronous-unwind-tables on x86_64.
This is why I haven't implemented it originally as it only paper overs the
real problem and it leads to unreliable backtraces in longterm.
Jan
next prev parent reply other threads:[~2017-04-03 21:23 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-15 23:34 Mark Wielaard
2017-02-15 23:34 ` [PATCH 2/3] Add frame pointer unwinding as fallback on arm Mark Wielaard
2017-02-15 23:34 ` [PATCH 1/3] Add frame pointer unwinding as fallback on x86_64 Mark Wielaard
2017-02-15 23:34 ` [PATCH 3/3] Add frame pointer unwinding for aarch64 Mark Wielaard
2017-02-16 9:13 ` frame unwinding patches Ulf Hermann
2017-04-03 9:00 ` Milian Wolff
2017-04-03 9:03 ` Ulf Hermann
2017-04-03 21:14 ` Mark Wielaard
2017-04-07 10:27 ` Mark Wielaard
2017-04-11 10:16 ` Ulf Hermann
2017-04-19 19:48 ` Mark Wielaard
2017-04-20 9:26 ` Ulf Hermann
2017-04-25 12:50 ` Mark Wielaard
2017-04-25 12:54 ` [PATCH 1/5] Revert "Optionally allow unknown symbols in the backtrace tests" Mark Wielaard
2017-04-25 12:50 ` [PATCH 2/5] tests: Add core backtracegen chec and regenerate ppc32 backtrace test files Mark Wielaard
2017-04-25 13:04 ` Ulf Hermann
2017-04-25 12:55 ` [PATCH 3/5] Add frame pointer unwinding as fallback on x86_64 Mark Wielaard
2017-04-25 13:05 ` Ulf Hermann
2017-04-25 12:56 ` [PATCH 4/5] Add i386 frame pointer unwinder Mark Wielaard
2017-04-25 13:38 ` Ulf Hermann
2017-04-25 12:56 ` [PATCH 1/5] Revert "Optionally allow unknown symbols in the backtrace tests" Ulf Hermann
2017-04-25 13:11 ` [PATCH 5/5] Add frame pointer unwinding for aarch64 Mark Wielaard
2017-04-25 21:55 ` Ulf Hermann
2017-04-25 22:13 ` Mark Wielaard
2017-04-25 22:23 ` Ulf Hermann
2017-04-26 15:24 ` Mark Wielaard
2017-04-27 14:02 ` Ulf Hermann
2017-04-27 14:29 ` Mark Wielaard
2017-04-27 14:35 ` Ulf Hermann
2017-04-27 15:09 ` Mark Wielaard
2017-04-27 15:42 ` Ulf Hermann
2017-05-03 8:46 ` Mark Wielaard
2017-04-26 15:20 ` frame unwinding patches Ulf Hermann
2017-04-03 21:23 ` Jan Kratochvil [this message]
2017-04-04 7:40 ` Milian Wolff
2017-04-04 7:55 ` Jan Kratochvil
2017-04-04 8:25 ` Ulf Hermann
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