From: "Uecker, Martin" <Martin.Uecker@med.uni-goettingen.de>
To: "law@redhat.com" <law@redhat.com>,
"Peter.Sewell@cl.cam.ac.uk" <Peter.Sewell@cl.cam.ac.uk>,
"richard.guenther@gmail.com" <richard.guenther@gmail.com>
Cc: "gcc@gcc.gnu.org" <gcc@gcc.gnu.org>,
"cl-c-memory-object-model@lists.cam.ac.uk"
<cl-c-memory-object-model@lists.cam.ac.uk>
Subject: Re: C provenance semantics proposal
Date: Thu, 18 Apr 2019 13:54:00 -0000 [thread overview]
Message-ID: <1555595634.12545.10.camel@med.uni-goettingen.de> (raw)
In-Reply-To: <30c3be07-433d-b945-40de-7b9a02f78789@redhat.com>
Am Donnerstag, den 18.04.2019, 07:42 -0600 schrieb Jeff Law:
> On 4/18/19 6:20 AM, Uecker, Martin wrote:
> > Am Donnerstag, den 18.04.2019, 11:45 +0100 schrieb Peter Sewell:
> > > On Thu, 18 Apr 2019 at 10:32, Richard Biener <richard.guenther@gmail.com> wrote:
...
> > 4.) Compilers make sure that exposed objects never
> > are allocated next to each other (as Jens proposed).
>
> Ugh. Not sure how you enforce that. Consider that the compiler may
> ultimately have no control over layout of data in static storage.
One maybe only where it matters? I assume the biggest benefit
is for local variables and there the compiler has full control.
For arbitrary pointer coming from somewhere, one has no provenance
information anyway.
Best,
Martin
next prev parent reply other threads:[~2019-04-18 13:54 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-02 8:11 Peter Sewell
2019-04-12 14:51 ` Jeff Law
2019-04-12 15:31 ` Peter Sewell
2019-04-17 9:06 ` Richard Biener
2019-04-17 9:15 ` Peter Sewell
2019-04-17 9:41 ` Richard Biener
2019-04-17 11:53 ` Uecker, Martin
2019-04-17 12:41 ` Richard Biener
2019-04-17 12:56 ` Uecker, Martin
2019-04-17 13:35 ` Richard Biener
2019-04-17 14:12 ` Uecker, Martin
2019-04-17 17:31 ` Peter Sewell
2019-04-18 9:32 ` Richard Biener
2019-04-18 9:56 ` Richard Biener
2019-04-18 10:48 ` Peter Sewell
2019-04-18 11:57 ` Uecker, Martin
2019-04-18 12:31 ` Richard Biener
2019-04-18 13:25 ` Uecker, Martin
2019-04-18 10:45 ` Peter Sewell
2019-04-18 12:20 ` Uecker, Martin
2019-04-18 12:42 ` Richard Biener
2019-04-18 12:47 ` Jakub Jelinek
2019-04-18 12:51 ` Jakub Jelinek
2019-04-18 13:29 ` Jeff Law
2019-04-24 10:12 ` Richard Biener
2019-04-18 13:49 ` Uecker, Martin
2019-04-19 8:19 ` Jens Gustedt
2019-04-19 8:49 ` Jakub Jelinek
2019-04-19 9:09 ` Jens Gustedt
2019-04-19 9:34 ` Jakub Jelinek
2019-04-21 8:15 ` Jens Gustedt
2019-04-24 10:24 ` Richard Biener
2019-04-24 18:43 ` Jeff Law
2019-04-24 19:21 ` Jens Gustedt
2019-04-19 9:11 ` Peter Sewell
2019-04-19 9:15 ` Jens Gustedt
2019-04-19 9:35 ` Peter Sewell
2019-04-19 10:35 ` Uecker, Martin
2019-04-19 10:01 ` Uecker, Martin
2019-04-18 13:42 ` Jeff Law
2019-04-18 13:54 ` Uecker, Martin [this message]
2019-04-18 14:49 ` Peter Sewell
2019-04-18 15:09 ` Uecker, Martin
2019-04-24 10:19 ` Richard Biener
2019-04-24 18:41 ` Jeff Law
2019-04-24 19:30 ` Philipp Klaus Krause
2019-04-24 19:55 ` Uecker, Martin
2019-04-24 19:33 ` Jakub Jelinek
2019-04-24 21:19 ` Peter Sewell
2019-04-25 12:42 ` Richard Biener
2019-04-25 13:03 ` Peter Sewell
2019-04-25 13:13 ` Richard Biener
2019-04-25 13:20 ` Peter Sewell
2019-04-29 14:31 ` Joseph Myers
2019-04-25 12:39 ` Richard Biener
2019-05-09 11:26 ` Ralf Jung
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