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Re: [patch] Speed up find_pc_section

From: Jan Kratochvil <jan dot kratochvil at redhat dot com>
To: Paul Pluzhnikov <ppluzhnikov at google dot com>
Cc: Ulrich Weigand <Ulrich dot Weigand at de dot ibm dot com>, gdb-patches ml <gdb-patches at sourceware dot org>, Tom Tromey <tromey at redhat dot com>
Date: Thu, 27 Aug 2009 00:45:44 +0200
Subject: Re: [patch] Speed up find_pc_section
References: <8ac60eac0908201340k6b759eb5o9bb73c8f473d8785@mail.gmail.com> <200908211130.n7LBUCJc011108@d12av02.megacenter.de.ibm.com> <8ac60eac0908231548x135edf2doa04fa59a49455bcd@mail.gmail.com> <8ac60eac0908260020l4200cf84v2686a76b5858d13@mail.gmail.com> <20090826120349.GA10411@host0.dyn.jankratochvil.net> <8ac60eac0908260737x4458c789o18c9d01bffa8c73c@mail.gmail.com>

On Wed, 26 Aug 2009 16:37:24 +0200, Paul Pluzhnikov wrote:
> When I extract vdso.so via attached dump-vdso.c (Fedora disallows
> reading of /proc/self/mem),

Sorry I did not expect a dumper would be needed.  I usually dump VDSO
by GDB `dump memory' (after reading its address in /proc/PID/maps).

> I see this:

OK, reproduced, both native i386 and i386-on-x86_64 (thus vdso32 in general),
even with upstream kernel, posted:
	http://marc.info/?l=linux-kernel&m=125132628701515&w=2

Still I understand your workaround is unfortunately needed for GDB.

Thanks,
Jan

Follow-Ups:
- Re: [patch] Speed up find_pc_section
  - From: Paul Pluzhnikov

References:
- Re: [patch] Speed up find_pc_section
  - From: Paul Pluzhnikov
- Re: [patch] Speed up find_pc_section
  - From: Ulrich Weigand
- Re: [patch] Speed up find_pc_section
  - From: Paul Pluzhnikov
- Re: [patch] Speed up find_pc_section
  - From: Paul Pluzhnikov
- Re: [patch] Speed up find_pc_section
  - From: Jan Kratochvil
- Re: [patch] Speed up find_pc_section
  - From: Paul Pluzhnikov

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