From: Paolo Bonzini <pbonzini@redhat.com>
To: "Daniel P. Berrange" <berrange@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>,
Stefan Hajnoczi <stefanha@redhat.com>,
Stefan Hajnoczi <stefanha@gmail.com>,
qemu-devel@nongnu.org, Markus Armbruster <armbru@redhat.com>,
Anthony Liguori <aliguori@amazon.com>,
Andreas Faerber <afaerber@suse.de>
Subject: Re: [Qemu-devel] [PATCH 3/3] qtest: kill QEMU process on g_assert() failure
Date: Tue, 18 Feb 2014 11:23:02 +0100 [thread overview]
Message-ID: <53033486.4050704@redhat.com> (raw)
In-Reply-To: <20140218101759.GC32645@redhat.com>
Il 18/02/2014 11:17, Daniel P. Berrange ha scritto:
>>> > >Yes, SIGABRT is synchronous for all purposes. So the only danger is
>>> > >that g_string_free() or g_free() could fail while we're in
>>> > >g_assert(false). But they don't, which makes sense because they are
>>> > >totally unrelated to g_assert() and therefore can handle re-entrancy.
>> >
>> > If malloc aborts due to a double free or other similar problem, you
>> > may risk reentering it.
> If you register the custom SIGABRT handler with sigaction + SA_RESETHAND
> then you'd avoid the re-entrancy risk, since a cascading SIGABRT would
> get handled by the system default handler, which would immediately
> terminate the process.
I meant reentering malloc.
Paolo
next prev parent reply other threads:[~2014-02-18 10:23 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-17 15:44 [Qemu-devel] [PATCH 0/3] qtest: avoid pidfile and QEMU process leaks Stefan Hajnoczi
2014-02-17 15:44 ` [Qemu-devel] [PATCH 1/3] qtest: drop unused child_pid field Stefan Hajnoczi
2014-02-17 15:44 ` [Qemu-devel] [PATCH 2/3] qtest: make QEMU our direct child process Stefan Hajnoczi
2014-02-17 16:44 ` Markus Armbruster
2014-02-18 9:00 ` Stefan Hajnoczi
2014-02-18 9:53 ` Markus Armbruster
2014-02-17 15:44 ` [Qemu-devel] [PATCH 3/3] qtest: kill QEMU process on g_assert() failure Stefan Hajnoczi
2014-02-17 16:16 ` Paolo Bonzini
2014-02-17 17:00 ` Markus Armbruster
2014-02-18 9:05 ` Stefan Hajnoczi
2014-02-18 10:05 ` Markus Armbruster
2014-02-18 10:23 ` Paolo Bonzini
2014-02-18 10:43 ` Markus Armbruster
2014-02-18 14:38 ` Stefan Hajnoczi
2014-02-18 10:07 ` Paolo Bonzini
2014-02-18 10:17 ` Daniel P. Berrange
2014-02-18 10:23 ` Paolo Bonzini [this message]
2014-02-17 16:49 ` Markus Armbruster
2014-02-17 16:56 ` Paolo Bonzini
2014-02-18 9:17 ` Stefan Hajnoczi
2014-02-18 9:55 ` Markus Armbruster
2014-02-18 14:44 ` Stefan Hajnoczi
2014-02-18 14:56 ` Peter Maydell
2014-02-18 10:02 ` Markus Armbruster
2014-02-18 14:38 ` Stefan Hajnoczi
2014-02-18 14:52 ` Markus Armbruster
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