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Re: debug container mutex association

From: François Dumont <frs dot dumont at gmail dot com>
To: Andreas Schwab <schwab at linux-m68k dot org>
Cc: Jonathan Wakely <jwakely at redhat dot com>, "libstdc++ at gcc dot gnu dot org" <libstdc++ at gcc dot gnu dot org>
Date: Fri, 5 Jan 2018 22:31:56 +0100
Subject: Re: debug container mutex association
Authentication-results: sourceware.org; auth=none
References: <46b4f297-c0da-b0b0-03ef-bba019b97ec7@gmail.com> <20160914090036.GC17376@redhat.com> <b0588485-586b-d2cf-42b9-14d5fb34961c@gmail.com> <20160915085143.GJ17376@redhat.com> <2af7879c-bef5-7874-b5ae-722ad3a1e171@gmail.com> <87lghlikh6.fsf@linux-m68k.org> <d9da4a26-1536-993b-6ed0-14ba854d7aee@gmail.com> <878tddmcnt.fsf@linux-m68k.org>

I see your point. I'll add similar test for each kind of debug containerto see if we really have this problem at the momentor in the future.Maybe for biggest container like the unordered ones.


I'll check if I can use sizeof in this case.

Thanks for the report.


On 05/01/2018 00:23, Andreas Schwab wrote:

On Jan 04 2018, François Dumont <frs.dumont@gmail.com> wrote:

get_safe_base_mutex in debug.cc will always associate a different mutex to
the 16 containers relying in a continuous memory area.

That is only true if the alignment equals the size.  It's only the size
that determines the consecutive addresses.

Andreas.

References:
- Re: debug container mutex association
  - From: François Dumont
- Re: debug container mutex association
  - From: Andreas Schwab

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