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Re: [PATCH] Improve corefile generation by using /proc/PID/coredump_filter (PR corefile/16902)
- From: Jan Kratochvil <jan dot kratochvil at redhat dot com>
- To: Pedro Alves <palves at redhat dot com>
- Cc: Oleg Nesterov <oleg at redhat dot com>, Sergio Durigan Junior <sergiodj at redhat dot com>, GDB Patches <gdb-patches at sourceware dot org>
- Date: Thu, 12 Mar 2015 16:57:12 +0100
- Subject: Re: [PATCH] Improve corefile generation by using /proc/PID/coredump_filter (PR corefile/16902)
- Authentication-results: sourceware.org; auth=none
- References: <878ufc9kau dot fsf at redhat dot com> <20150305154827 dot GA9441 at host1 dot jankratochvil dot net> <87zj7r5fpz dot fsf at redhat dot com> <20150305205744 dot GA13165 at host1 dot jankratochvil dot net> <20150311200052 dot GA22654 at redhat dot com> <20150312150024 dot GA4817 at redhat dot com> <5501B48B dot 7060802 at redhat dot com>
On Thu, 12 Mar 2015 16:45:15 +0100, Pedro Alves wrote:
> On 03/12/2015 03:00 PM, Oleg Nesterov wrote:
>
> > However. If (for any reason) you decide to dump this region, gdb can
> > look into /proc/self/maps, find its own "vvar" mapping, and simply read
> > this memory. Unlike "vdso", "vvar" has the same content for every process.
>
> Actually it can't: GDB may well be dumping the memory of
> a process running on another machine (through gdbserver).
So it can - from gdbserver's [vvar].
Jan