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Re: PCH and exec-shield...

From: Mike Stump <mrs at apple dot com>
To: Zack Weinberg <zack at codesourcery dot com>
Cc: Mark Mitchell <mark at codesourcery dot com>, David Edelsohn <dje at watson dot ibm dot com>, Ian Lance Taylor <ian at wasabisystems dot com>, law at redhat dot com, Eric Christopher <echristo at redhat dot com>, David Daney <ddaney at avtrex dot com>, gcc at gcc dot gnu dot org
Date: Tue, 16 Mar 2004 17:30:38 -0800
Subject: Re: PCH and exec-shield...

On Tuesday, March 16, 2004, at 03:50 PM, Zack Weinberg wrote:

To ask a tangential question, if (as presently implemented) PCH has to
reload data structures at the original address, why is there a problem
with hashing pointers?

We swizzle on PCH write. PCH write can be amortized across multiple uses better, also, during writing, memory is hot. During load, we could have to bring in (from disk/network) and COW it.

Follow-Ups:
- Re: PCH and exec-shield...
  - From: Ian Lance Taylor

References:
- Re: PCH and exec-shield...
  - From: Zack Weinberg

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