Re: lib/53805: dlclose(3) does not interact correctly with atexit(3) callbacks

[Kamil Rytarowski <n54%gmx.com@localhost>]

The following reply was made to PR lib/53805; it has been noted by GNATS.

From: Kamil Rytarowski <n54%gmx.com@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: lib/53805: dlclose(3) does not interact correctly with atexit(3)
 callbacks
Date: Thu, 20 Dec 2018 19:25:20 +0100

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 From: Kamil Rytarowski <n54%gmx.com@localhost>
 To: gnats-bugs%NetBSD.org@localhost
 Message-ID: <8745893e-7d9c-db69-27d5-787b405c7db1%gmx.com@localhost>
 Subject: Re: lib/53805: dlclose(3) does not interact correctly with atexit(3)
  callbacks
 References: <pr-lib-53805%gnats.netbsd.org@localhost>
  <20181220170732.7C3557A1ED%mollari.NetBSD.org@localhost>
  <20181220182001.784727A1E3%mollari.NetBSD.org@localhost>
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 On 20.12.2018 19:20, Joerg Sonnenberger wrote:
 > The following reply was made to PR lib/53805; it has been noted by GNAT=
 S.
 >=20
 > From: Joerg Sonnenberger <joerg%bec.de@localhost>
 > To: gnats-bugs%NetBSD.org@localhost
 > Cc: lib-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
 > 	netbsd-bugs%netbsd.org@localhost, n54%gmx.com@localhost
 > Subject: Re: lib/53805: dlclose(3) does not interact correctly with ate=
 xit(3)
 >  callbacks
 > Date: Thu, 20 Dec 2018 19:19:06 +0100
 >=20
 >  On Thu, Dec 20, 2018 at 06:10:01PM +0000, Kamil Rytarowski wrote:
 >  >  This is the common behavior of atexit(3) vs dlclose(3). Internally
 >  >  atexit(3) is registered together with its DSO pointer so we have al=
 l we
 >  >  need there.
 > =20
 >  It's not, that's the whole point. atexit(3) has no idea what DSO the
 >  handler is in beyond doing address scans. Which is exactly atexit(3) i=
 s
 >  the wrong interface here.
 > =20
 >  Joerg
 > =20
 >=20
 
 Please see my newer message. atexit(3) should be registered with NULL
 DSO according to
 https://itanium-cxx-abi.github.io/cxx-abi/abi.html#dso-dtor-runtime-api
 
 
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