Groups > comp.lang.java.programmer > #10507

Re: 64-bit gotcha

Path	csiph.com!x330-a1.tempe.blueboxinc.net!newsfeed.hal-mli.net!feeder3.hal-mli.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!border3.nntp.dca.giganews.com!Xl.tags.giganews.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local2.nntp.dca.giganews.com!nntp.posted.palinacquisition!news.posted.palinacquisition.POSTED!not-for-mail
NNTP-Posting-Date	Sun, 04 Dec 2011 18:56:24 -0600
Date	Sun, 04 Dec 2011 16:56:22 -0800
From	Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com>
User-Agent	Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5; rv:8.0) Gecko/20111105 Thunderbird/8.0
MIME-Version	1.0
Newsgroups	comp.lang.java.programmer
Subject	Re: 64-bit gotcha
References	<vvujd71j7k73s1m61bu10eol0ebtn4iem0@4ax.com> <4eda8488$0$287$14726298@news.sunsite.dk> <xbKdnW4-I_26AUfTnZ2dnUVZ_qqdnZ2d@posted.palinacquisition> <jbh3gd$4th$1@dont-email.me>
In-Reply-To	<jbh3gd$4th$1@dont-email.me>
Content-Type	text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding	7bit
Message-ID	<xNudnUrXwvIli0HTnZ2dnUVZ_oKdnZ2d@posted.palinacquisition> (permalink)
Lines	17
X-Usenet-Provider	http://www.giganews.com
NNTP-Posting-Host	50.46.118.188
X-Trace	sv3-X2ewTvNaPLtIV492rW6Kr4vvLOiQc0oby81K/a4s2Ein4Jo1FQExCzKqUYpdBjRsRJYsC8WvwTLlFPG!0O4o2h2WZbJo3r9GrAzoGZe/GNGL6DQ5yC9WP3QYEtk6kfLS0lNk0Yvzk+VsoYTxVZkC1MFoGx/l!9d9s5J88L+rU0SpL54m4L4LPMyYmYSkUT/pmpYZWEcs=
X-Complaints-To	abuse@iinet.com
X-DMCA-Complaints-To	abuse@iinet.com
X-Abuse-and-DMCA-Info	Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info	Otherwise we will be unable to process your complaint properly
X-Postfilter	1.3.40
X-Original-Bytes	2176
Xref	x330-a1.tempe.blueboxinc.net comp.lang.java.programmer:10507

Show key headers only | View raw

On 12/4/11 4:33 PM, Joshua Cranmer wrote:
> [...]
> It still wouldn't be impossible to make 32-from-64 to work, but it would
> certainly require IPC between a 64-bit real process and a 32-bit shadow
> process; given undecidability of pointer aliasing (plus loads of pointer
> punning), it would probably require nontrivial tailoring the 32-bit
> process to get this to work--which raises the question of why not
> translate it to 64-bit code in the first place.

Note that on Windows, COM already includes this sort of cross-process 
marshaling.  So at least out-of-proc COM servers already automatically 
support cross-bitness scenarios.

But of course, that applies only to COM servers.  Plain vanilla DLLs 
would not have this infrastructure already built in.

Pete

Thread

64-bit gotcha Roedy Green <see_website@mindprod.com.invalid> - 2011-12-03 02:47 -0800
  Re: 64-bit gotcha Arne Vajhøj <arne@vajhoej.dk> - 2011-12-03 15:20 -0500
    Re: 64-bit gotcha Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-12-03 14:01 -0800
      Re: 64-bit gotcha Roedy Green <see_website@mindprod.com.invalid> - 2011-12-03 18:17 -0800
        Re: 64-bit gotcha Martin Gregorie <martin@address-in-sig.invalid> - 2011-12-04 12:06 +0000
          Re: 64-bit gotcha Jeff Higgins <jeff@invalid.invalid> - 2011-12-04 08:57 -0500
            Re: 64-bit gotcha Jeff Higgins <jeff@invalid.invalid> - 2012-02-25 19:15 -0500
              Re: 64-bit gotcha Martin Gregorie <martin@address-in-sig.invalid> - 2012-02-26 00:53 +0000
                Re: 64-bit gotcha Jeff Higgins <jeff@invalid.invalid> - 2012-02-25 20:26 -0500
          Re: 64-bit gotcha Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-12-04 10:04 -0400
        Re: 64-bit gotcha Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 19:50 -0400
      Re: 64-bit gotcha Travers Naran <tnaran@gmail.com> - 2011-12-04 09:17 -0800
      Re: 64-bit gotcha Joshua Cranmer <Pidgeot18@verizon.invalid> - 2011-12-04 18:33 -0600
        Re: 64-bit gotcha Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-12-04 16:56 -0800
        Re: 64-bit gotcha Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 19:53 -0400
      Re: 64-bit gotcha Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 19:49 -0400

csiph-web