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Re: [RFC][PR 67336][PING^6] Verify pointers during stack unwind
- From: Yury Gribov <tetra2005 dot patches at gmail dot com>
- To: Florian Weimer <fw at deneb dot enyo dot de>, Yuri Gribov <tetra2005 at gmail dot com>
- Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>, Ian Lance Taylor <ian at airs dot com>, Andrew Pinski <pinskia at gmail dot com>
- Date: Thu, 3 Aug 2017 20:17:30 +0100
- Subject: Re: [RFC][PR 67336][PING^6] Verify pointers during stack unwind
- Authentication-results: sourceware.org; auth=none
- References: <CAJOtW+4_FR+1zBiTvL_EBN7NGj-S9=7cR5Qsm560P7XsyLfFzA@mail.gmail.com> <87k22ky44b.fsf@mid.deneb.enyo.de>
On 03.08.2017 18:04, Florian Weimer wrote:
* Yuri Gribov:
I've rebased the previous patch to trunk per Andrew's suggestion.
Original patch description/motivation/questions are in
https://gcc.gnu.org/ml/gcc-patches/2017-06/msg01869.html
What about the remaining TODOs?
Yes, need to be fixed. Note that patch is an RFC so I didn't want to
polish it until I get enough feedback from others.
+ if (__builtin_expect (msync ((void *)page, len, MS_ASYNC), 0))
+ return 0;
Is there any reason not to probe using mincore? It won't trigger
writeback.
Nice, for some reason I didn't realize it provides necessary info.
-Y