delorie.com/archives/browse.cgi   search  
Mail Archives: cygwin/2025/03/07/03:19:45

DMARC-Filter: OpenDMARC Filter v1.4.2 delorie.com 5278JjTH880844
Authentication-Results: delorie.com; dmarc=pass (p=none dis=none) header.from=cygwin.com
Authentication-Results: delorie.com; spf=pass smtp.mailfrom=cygwin.com
DKIM-Filter: OpenDKIM Filter v2.11.0 delorie.com 5278JjTH880844
Authentication-Results: delorie.com;
dkim=pass (1024-bit key, unprotected) header.d=cygwin.com header.i=@cygwin.com header.a=rsa-sha256 header.s=default header.b=nlSXp5hm
X-Recipient: archive-cygwin AT delorie DOT com
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org AE4173858C2C
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
s=default; t=1741335583;
bh=EWJ84ZRrP7qDRSn57m/NzdAw2WCMMuwTXaZI/G5tuXs=;
h=References:In-Reply-To:Date:Subject:To:List-Id:List-Unsubscribe:
List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:
From;
b=nlSXp5hm4eLNeHHJFhEsNMcXvLx9+t361TSuN99nhUnwrRtConb568CtIrmtT040h
oZDsF8kA8iZUjXSUfjn2+XzOz8dii3nzj43ZMt9qFLEwvGC/kLO/gvWUF439aW74Mp
IRjcDusmmdr5YcfXIQkFi/u17kNDgyQBSsPI1/Qo=
X-Original-To: cygwin AT cygwin DOT com
Delivered-To: cygwin AT cygwin DOT com
DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 3578C3858D1E
ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 3578C3858D1E
ARC-Seal: i=2; a=rsa-sha256; d=sourceware.org; s=key; t=1741335541; cv=pass;
b=cmklXxKvtevQIS3iMBOu6efblACG9+LUtktLRnQqldB3mYFvI1tW09Gl78o4LNIST6PeIE6zHMvxsQu5Cadoxm4SstDdNimDsI/g0kmD5+L/e1lx51XOsh7qWU47y4FCZzRiU13hm7FCMMHaKVwC7TFUbxlTof+xuyqD63YPrvE=
ARC-Message-Signature: i=2; a=rsa-sha256; d=sourceware.org; s=key;
t=1741335541; c=relaxed/simple;
bh=WRxoXyAq/uM82EPaB0sFWkxYsQ5OeRQ3HvCv2dCZIWI=;
h=DKIM-Signature:MIME-Version:From:Date:Message-ID:Subject:To;
b=ffd+k7WUYuWDSVV5hZk+dcpIg+aY7F+4boddSM+oA1GDO6kQVrlULL9gCbJb04ksn6w9x0g9jLtv4BQYuPwtT7iD3ZFzWh596z9ft50sZS19wr8Mp/tYUTcryUF0vAmFvTjeI2++hZFQT0bVEiZ6IOD6Pvfp3ni0VcpS7yrlTGI=
ARC-Authentication-Results: i=2; server2.sourceware.org
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 3578C3858D1E
X-Sender-Id: dreamhost|x-authsender|gisburn AT nrubsig DOT org
ARC-Seal: i=1; s=arc-2022; d=mailchannels.net; t=1741335539; a=rsa-sha256;
cv=none;
b=ibq/FhG/hKROHGR9Egnu7n6zc71omOkV+2s2IBDRsI5dDkVQd7NVWf+VeZE4vwL94yggZK
eipQax6G6SUPUN5WVNCMbMZ4+2fSmrr+e3TqQxSg4xOfsWQM8+ks4GtFIoRcFrWBa9SBol
MhFu7ZWvkOuNk9ZqwNnJ/InTKpczwQrGikAW8rGIWI3KvE2s9QSaV/y7KNKhYS7I+8ZD5k
JWmctFMaFIIzHz/KYWlLcRttoVlYY8k6plLLurHPidOWdf2YmQxyPoYa/pkpnguZWQR8nk
Y+2kMZ/o3c2p7iMNh3wgGsRk87KpasfpdOdFUIv2yCq96epCTfq8fY9Sa/bgwg==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed;
d=mailchannels.net; s=arc-2022; t=1741335539;
h=from:from:reply-to:subject:subject:date:date:message-id:message-id:
to:to:cc:mime-version:mime-version:content-type:content-type:
content-transfer-encoding:content-transfer-encoding:
in-reply-to:in-reply-to:references:references:dkim-signature;
bh=3XS0GLskFL6jwY/rrqYJ+i0WN8pPMGouj/2VA/vi7rg=;
b=uBTQnEKNnws3+uWuG0Qf6E+QWwAwVYHbg/vuq4Ibkmg0KplgDaWmoFGAoGjTAfFWdJvrDQ
VWpq2fE3TIeLVVHxOo/k5T2xjK+JFFNeMVdahmJW1KTO86gipzHKYZlu6mVswrNjlUaB9A
MQcqy/GwLa1X57l5z8mlAGBly4sRHQ+JQFRbCH1kNIuiAM+kFyp4SAj39FqkNyY9AD7SHs
/2dbYomsAPgyWiDc5MW7+5rLSThQsQqWeo0tCJlNVRbMb3VbVcDiX0BeAIGW99ib+0XFW5
2y4FjPBlqlK7vFzP9xx3ZHNZgTM0udwtl+GzliIpTFxwfq5Aadpl1XQPmMUCPw==
ARC-Authentication-Results: i=1; rspamd-bc7dff857-xwsdk;
auth=pass smtp.auth=dreamhost smtp.mailfrom=roland DOT mainz AT nrubsig DOT org
X-Sender-Id: dreamhost|x-authsender|gisburn AT nrubsig DOT org
X-MC-Relay: Neutral
X-MailChannels-SenderId: dreamhost|x-authsender|gisburn AT nrubsig DOT org
X-MailChannels-Auth-Id: dreamhost
X-Power-Battle: 258cfccd3e39fe7b_1741335539467_3948709005
X-MC-Loop-Signature: 1741335539467:250221588
X-MC-Ingress-Time: 1741335539466
X-Gm-Message-State: AOJu0YyfXQbbDJT3B6p2xRaTK8D+uY4LC5ToZdtrDPyvCyTsMhWo8PTb
vLGRjBMxHbMMdF3h8Y9RndcbFJAVkmXsrF92V0njEroSkKz8UOUfn88zY2maeVrtr8ilL4/c/Qx
h8gUldZR8IvMuH1UJkCZwmY8y5XQ=
X-Google-Smtp-Source: AGHT+IEp0EpGx2tcHZygp2JVrynBpzMM66a+FsnvONFPfmQ/YK8atqwoE6x/J7cRRlm8hbORpefEgcAbLMPg54YEoTc=
X-Received: by 2002:a5d:5847:0:b0:391:2e97:578b with SMTP id
ffacd0b85a97d-39132db5acamr1420427f8f.53.1741335537606; Fri, 07 Mar 2025
00:18:57 -0800 (PST)
MIME-Version: 1.0
References: <8c465025-4858-3113-fe2d-ce00dad21f8a AT t-online DOT de>
<20250228212020 DOT 433a339f073060f65a0a736d AT nifty DOT ne DOT jp>
<de045db2-09b1-b2ab-d0d6-32f8c6906386 AT t-online DOT de>
<20250307162951 DOT f6d301ec44a0a51fdf32aaf3 AT nifty DOT ne DOT jp>
In-Reply-To: <20250307162951.f6d301ec44a0a51fdf32aaf3@nifty.ne.jp>
Date: Fri, 7 Mar 2025 09:18:31 +0100
X-Gmail-Original-Message-ID: <CAKAoaQ=3bVpVodkHPOn7wtiHA6W4bbqiYUqJv4j1-Vud-HC0dg AT mail DOT gmail DOT com>
X-Gm-Features: AQ5f1JodypcNX08CkE5oGeyx8BoP8uVmwaf3NeKTCiD3gMkCMu28ohL_O6BmOYs
Message-ID: <CAKAoaQ=3bVpVodkHPOn7wtiHA6W4bbqiYUqJv4j1-Vud-HC0dg@mail.gmail.com>
Subject: Re: lost signal (was: cygwin 3.6.0: Signals may fail permanently if
received after SIGSTOP)
To: cygwin AT cygwin DOT com
X-BeenThere: cygwin AT cygwin DOT com
X-Mailman-Version: 2.1.30
List-Id: General Cygwin discussions and problem reports <cygwin.cygwin.com>
List-Archive: <https://cygwin.com/pipermail/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-request AT cygwin DOT com?subject=help>
List-Subscribe: <https://cygwin.com/mailman/listinfo/cygwin>,
<mailto:cygwin-request AT cygwin DOT com?subject=subscribe>
From: Roland Mainz via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Roland Mainz <roland DOT mainz AT nrubsig DOT org>
Sender: "Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>
X-MIME-Autoconverted: from base64 to 8bit by delorie.com id 5278JjTH880844

On Fri, Mar 7, 2025 at 8:29 AM Takashi Yano via Cygwin
<cygwin AT cygwin DOT com> wrote:
> On Wed, 5 Mar 2025 11:23:26 +0100
> Christian Franke wrote:
[snip]
> > A 'ps' is a second terminal then shows that the child process is still
> > in S)topped state. 'kill -CONT ...' works to continue.
> >
> > If the testcase is assigned to a single core with 'taskset 0x1 ...', it
> > apparently always hangs.
>
> Thanks for the report and the testcase.
> The current implementation of the signal queue has the following problems:
> 1) Signals in the queue are processed in a disordered manner.
> 2) If the same signal is already in the queue, new signal is discarded.

Erm... that is actually the intended POSIX behaviour *except* for
SIGRT* signals. Any signal coming queued more than one time *CAN* (it
is not a requirement, and for some signals it's not useful, like
|SIGCHLD|, because their siginfo data cannot be folded) be "folded"
into one signal.
The only exception in the POSIX standard are realtime signals, which
have a realtime signal queue, and |sigqueue()| has a return code which
indicates when the preallocated storage for realtime signals and their
payload (see |sigval| argument in
https://pubs.opengroup.org/onlinepubs/9799919799/functions/sigqueue.html)
is full.

----

Bye,
Roland
-- 
  __ .  . __
 (o.\ \/ /.o) roland DOT mainz AT nrubsig DOT org
  \__\/\/__/  MPEG specialist, C&&JAVA&&Sun&&Unix programmer
  /O /==\ O\  TEL +49 641 3992797
 (;O/ \/ \O;)

-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple

- Raw text -


  webmaster     delorie software   privacy  
  Copyright © 2019   by DJ Delorie     Updated Jul 2019