From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "ken manheimer" Newsgroups: gmane.emacs.devel,gmane.emacs.pretest.bugs Subject: Re: pgg-gpg.el - pgg-gpg-process-region timing problem Date: Thu, 26 Jun 2008 12:16:17 -0400 Message-ID: <2cd46e7f0806260916y39870423ge4bda26f97d6d504@mail.gmail.com> References: <2cd46e7f0806221037h6d16839bp567eb5b901313375@mail.gmail.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_3321_25181615.1214496977333" X-Trace: ger.gmane.org 1214497001 31559 80.91.229.12 (26 Jun 2008 16:16:41 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 26 Jun 2008 16:16:41 +0000 (UTC) To: emacs-devel , emacs-pretest-bug@gnu.org, "Thien-Thi Nguyen" , "Stefan Monnier" , "Daiki Ueno" , " Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Jun 26 18:17:25 2008 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1KBu9u-0003e9-Ew for ged-emacs-devel@m.gmane.org; Thu, 26 Jun 2008 18:17:18 +0200 Original-Received: from localhost ([127.0.0.1]:38465 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1KBu94-0006Yo-Mt for ged-emacs-devel@m.gmane.org; Thu, 26 Jun 2008 12:16:26 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1KBu8y-0006Wz-T4 for emacs-devel@gnu.org; Thu, 26 Jun 2008 12:16:21 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1KBu8y-0006Wi-Aj for emacs-devel@gnu.org; Thu, 26 Jun 2008 12:16:20 -0400 Original-Received: from [199.232.76.173] (port=48628 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1KBu8y-0006We-87 for emacs-devel@gnu.org; Thu, 26 Jun 2008 12:16:20 -0400 Original-Received: from yx-out-1718.google.com ([74.125.44.154]:61761) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1KBu8x-0006sj-Rc for emacs-devel@gnu.org; Thu, 26 Jun 2008 12:16:20 -0400 Original-Received: by yx-out-1718.google.com with SMTP id 34so77885yxf.66 for ; Thu, 26 Jun 2008 09:16:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:in-reply-to:mime-version:content-type:references; bh=w3XZLziRrXQGttEwto6R9vtlBWSK3U5vurCAPa2KnSM=; b=dMdguAGfWRZJgBkQ6YOxp4XeBbuAPvtv0MULS3TchkinFcLdZvstF6NPKWu+vKDx8u qzUv0ZGWnSw59prBBYN17BGMEPjZcknn2HBn3GWtBFbyLHxLNKaA7KNwH0Tl3qNOOLUt HmAxwKEfWq1vhy0QKKhXmKwX9wtyMlRNRqLDM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:in-reply-to:mime-version :content-type:references; b=vWCMKU11Si/7hFydGBW6wPj0+H4M45Xq6Qg/rtSFDZ1yvVqZTZvhBzG2ZDQWcXfMKV 0YOyI1MfGtG27WE+OVqUQL4xboLLpRhyOWsk4zli8VjnvcwcmTF0vB/aIR5sZYtziHJZ QRPnlfrXa6fpX88WdnaCQiMJQSos5NDY14D3w= Original-Received: by 10.114.56.1 with SMTP id e1mr83896waa.204.1214496977326; Thu, 26 Jun 2008 09:16:17 -0700 (PDT) Original-Received: by 10.114.201.14 with HTTP; Thu, 26 Jun 2008 09:16:17 -0700 (PDT) In-Reply-To: <2cd46e7f0806221037h6d16839bp567eb5b901313375@mail.gmail.com> X-detected-kernel: by monty-python.gnu.org: Linux 2.6 (newer, 2) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:99968 gmane.emacs.pretest.bugs:22684 Archived-At: ------=_Part_3321_25181615.1214496977333 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline i am not sure how to proceed with this problem. as demonstrated by the pggprob.el script, i consistently get encryption and decryption problems without the contrived delay in my pgg-gpg-process-region patch. (the problem does not happen if i just do a regular pgg-decrypt - i think the crucial thing is that a symmetric passphrase is being passed into pgg-gpg-process-region.) i have tried everything i could think of to exclude local quirks from the problem, including starting emacs with '--no-site-file -q' and eliminating everything from my ~/.gnupg/gpg.conf file. i have reproduced the problem (and workaround) consistently in kubuntu 8.04 emacs-snapshot package and a recent CVS HEAD checkout. in fact, i have incidentally reinstalled my kubuntu 8.04 OS recently, on both my main 2.0 Ghz T43 thinkpad and on a 750 Mhz a20p thinkpad. the problem continues consistently on the t43 but does *not* occur on the a20p, which is not contrary to the sensitivities of a timing problem. i have also tried thien-thi nguyen's alternative approaches, but neither worked for me, hanging in different places. i am pretty sure this is a real problem, and something that warrants attention. i realize that the difficulty in repeating the problem elsewhere increases the challenge in addressing it, and am open to cooperating with people to try things, if that would help. the consistent effectiveness of my workaround should help provide clues about the nature of the problem, at least. any suggestions? -- ken http://myriadicity.net On Sun, Jun 22, 2008 at 1:37 PM, ken manheimer wrote: > allout encryption, which depends on pgg.el &c, has been failing due to > a weird timing problem i've narrowed down to the > pgg-gpg-process-region function. this is in emacs 23.0.60 built from > a CVS HEAD checkout of an hour or so ago, and some earlier 23.0.60 > versions. i've reproduced the problem using emacs -q and regularly > launched emacs, etc. > > the problem is that pgg-gpg-process-region often returns a nil status > despite successful decryption, unless a delay (eg, (sleep-for .3) is > inserted between process start and later interaction with the process. > with the delay, the status is something like 207 or 208, while > without it the status is nil - yet, on examination the content is > sucessfully decrypted. > > the size of the delay needs to be increased when the machine is > heavily loaded, and can be reduced (on my thinkpad t43 2 GHz laptop, > 3Gb ram, running kubuntu 8.0.4 +) to no lower than (sleep-for .2). > rarely, the proper status is returned without the delay, depending on > the machine load and other things i can't identify. considering the > real-time sensitivity of the problem, your mileage will almost > certainly vary! > > i originally thought the problem might be in gpg, but now figure it > resides either in the emacs process mechanism, pgg's use of that, or > somewhere in the combination of emacs and pgg. > > i've created a simple .el script, pggprob.el, with minimal code and > data to produce the problem, and a patch, pggprob-patch.txt, with a > single-line modification to pgg-gpg-process-region to work around the > problem. both are attached. since the workaround is merely a timing > delay, it's clearly not a fix! i'm hoping this is enough to enable > others to reproduce the problem, and investigate... > -- > ken > http://myriadicity.net > > If Emacs crashed, and you have the Emacs process in the gdb debugger, > please include the output from the following gdb commands: > `bt full' and `xbacktrace'. > If you would like to further debug the crash, please read the file > /home/klm/src/emacs-HEAD/etc/DEBUG for instructions. > > In GNU Emacs 23.0.60.1 (i686-pc-linux-gnu, GTK+ Version 2.12.9) > of 2008-06-22 on twist > Windowing system distributor `The X.Org Foundation', version 11.0.10400090 > Important settings: > value of $LC_ALL: nil > value of $LC_COLLATE: nil > value of $LC_CTYPE: nil > value of $LC_MESSAGES: nil > value of $LC_MONETARY: nil > value of $LC_NUMERIC: nil > value of $LC_TIME: nil > value of $LANG: en_US.UTF-8 > value of $XMODIFIERS: nil > locale-coding-system: utf-8-unix > default-enable-multibyte-characters: t > > Major mode: Emacs-Lisp > > Minor modes in effect: > tooltip-mode: t > tool-bar-mode: t > mouse-wheel-mode: t > menu-bar-mode: t > file-name-shadow-mode: t > global-font-lock-mode: t > font-lock-mode: t > blink-cursor-mode: t > global-auto-composition-mode: t > auto-composition-mode: t > auto-encryption-mode: t > auto-compression-mode: t > line-number-mode: t > transient-mark-mode: t > > Recent input: > C-x C-f l > i b / e m a a l l s c r p g g p > M-x e v a l - c u r M-. C-g > M-> C-x C-e M-x e m a c s r e p o r t > - e m > > Recent messages: > For information about GNU Emacs and the GNU system, type C-h C-a. > Source file `/home/klm/src/emacs-HEAD/lisp/pgg-gpg.el' newer than > byte-compiled file > Quit > Mark set > nil > -- ken http://myriadicity.net ------=_Part_3321_25181615.1214496977333 Content-Type: application/octet-stream; name=pggprob.el Content-Transfer-Encoding: base64 X-Attachment-Id: f_fhrwgxd60 Content-Disposition: attachment; filename=pggprob.el OzsgZGVtb25zdHJhdGUgdGltaW5nIHByb2JsZW0gaW4gcGdnLWdwZy1wcm9jZXNzLXJlZ2lvbgoK KHNldHEgcGFzc3BocmFzZSAiYSIKICAgICAgdmVyaWZpZXIgIi0tLS0tQkVHSU4gUEdQIE1FU1NB R0UtLS0tLQpWZXJzaW9uOiBHbnVQRyB2MS40LjYgKEdOVS9MaW51eCkKCmpBMEVBd01DbzcyZk5H QjFyTnhneVN2K3J4ZGtQdjQ2blZ4UTVmZzR5VDc4bGRnVmNEc2VEN01yZTRGaGppZm4KVlRBMS9Q ZG1ldFZmRmI5Kwo9TVhGNgotLS0tLUVORCBQR1AgTUVTU0FHRS0tLS0tIgogICAgICBjb3VudCAw KQoKKGRlZnVuIGRlY3J5cHQgKHBhc3NwaHJhc2UgdGV4dCkKICAod2l0aC1jdXJyZW50LWJ1ZmZl ciAoZ2V0LWJ1ZmZlci1jcmVhdGUgIipwZ2ctdGVzdCoiKQogICAgKGVyYXNlLWJ1ZmZlcikKICAg IChpbnNlcnQgdGV4dCkKICAgIChwZ2ctZGVjcnlwdCBuaWwgbmlsIHBhc3NwaHJhc2UpKSkKCjs7 IHRoZSBmb2xsb3dpbmcgeWllbGRzIG5pbCB3L291dCB0aGUgcGF0Y2hlZCBkZWxheSwgMjA4IHdp dGggaXQuCjs7IGV4YW1pbmF0aW9uIG9mIHRoZSBhY3R1YWwgcmVzdWx0cyBidWZmZXIgc2hvd3Mg dGhhdCB0aGUgdmVyaWZpZXIgaXMKOzsgc3VjY2Vzc2Z1bGx5IGRlY3J5cHRlZCBpbiBib3RoIGNh c2VzLCBob3dldmVyLgooZGVjcnlwdCBwYXNzcGhyYXNlIHZlcmlmaWVyKQo= ------=_Part_3321_25181615.1214496977333 Content-Type: text/plain; name=pgg-patch.txt Content-Transfer-Encoding: base64 X-Attachment-Id: f_fhrwusef2 Content-Disposition: attachment; filename=pgg-patch.txt LS0tIHBnZy1ncGcuZWwufjEuMjcufgkyMDA4LTA1LTA2IDAzOjU3OjQ2LjAwMDAwMDAwMCAtMDQw MAorKysgcGdnLWdwZy5lbAkyMDA4LTA2LTIyIDEzOjI0OjE0LjAwMDAwMDAwMCAtMDQwMApAQCAt ODYsNiArODYsNyBAQAogCSAgICAoc2V0cSBwcm9jZXNzCiAJCSAgKGFwcGx5ICMnc3RhcnQtcHJv Y2VzcyAiKkdudVBHKiIgZXJyb3JzLWJ1ZmZlcgogCQkJIHByb2dyYW0gYXJncykpKQorICAgICAg ICAgIChzbGVlcC1mb3IgLjMpICAgICAgICAgICAgICAgIDsga2xtOiB0aW1pbmcgZGVsYXkKIAkg IChzZXQtcHJvY2Vzcy1zZW50aW5lbCBwcm9jZXNzICMnaWdub3JlKQogCSAgKHdoZW4gcGFzc3Bo cmFzZQogCSAgICAoc2V0cSBwYXNzcGhyYXNlLXdpdGgtbmV3bGluZSAoY29uY2F0IHBhc3NwaHJh c2UgIlxuIikpCg== ------=_Part_3321_25181615.1214496977333--