From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <sourceware-bugzilla@sourceware.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 168F13858412; Sun, 19 Sep 2021 21:49:35 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 168F13858412
From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug dynamic-link/15971] No interface for debugger access to
 libraries loaded with dlmopen
Date: Sun, 19 Sep 2021 21:49:34 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: glibc
X-Bugzilla-Component: dynamic-link
X-Bugzilla-Version: unspecified
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: security-
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-15971-131-oZex9nXoO1@http.sourceware.org/bugzilla/>
In-Reply-To: <bug-15971-131@http.sourceware.org/bugzilla/>
References: <bug-15971-131@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: glibc-bugs@sourceware.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Glibc-bugs mailing list <glibc-bugs.sourceware.org>
List-Unsubscribe: <https://sourceware.org/mailman/options/glibc-bugs>,
 <mailto:glibc-bugs-request@sourceware.org?subject=unsubscribe>
List-Archive: <https://sourceware.org/pipermail/glibc-bugs/>
List-Help: <mailto:glibc-bugs-request@sourceware.org?subject=help>
List-Subscribe: <https://sourceware.org/mailman/listinfo/glibc-bugs>,
 <mailto:glibc-bugs-request@sourceware.org?subject=subscribe>
X-List-Received-Date: Sun, 19 Sep 2021 21:49:35 -0000

https://sourceware.org/bugzilla/show_bug.cgi?id=3D15971

--- Comment #7 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gn=
u.org> ---
The master branch has been updated by H.J. Lu <hjl@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=3Dglibc.git;h=3Da93d9e03a31ec14405c=
b3a09aa95413b67067380

commit a93d9e03a31ec14405cb3a09aa95413b67067380
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Tue Aug 17 19:35:48 2021 -0700

    Extend struct r_debug to support multiple namespaces [BZ #15971]

    Glibc does not provide an interface for debugger to access libraries
    loaded in multiple namespaces via dlmopen.

    The current rtld-debugger interface is described in the file:

    elf/rtld-debugger-interface.txt

    under the "Standard debugger interface" heading.  This interface only
    provides access to the first link-map (LM_ID_BASE).

    1. Bump r_version to 2 when multiple namespaces are used.  This triggers
    the GDB bug:

    https://sourceware.org/bugzilla/show_bug.cgi?id=3D28236

    2. Add struct r_debug_extended to extend struct r_debug into a linked-l=
ist,
    where each element correlates to an unique namespace.
    3. Initialize the r_debug_extended structure.  Bump r_version to 2 for
    the new namespace and add the new namespace to the namespace linked lis=
t.
    4. Add _dl_debug_update to return the address of struct r_debug' of a
    namespace.
    5. Add a hidden symbol, _r_debug_extended, for struct r_debug_extended.
    6. Provide the symbol, _r_debug, with size of struct r_debug, as an ali=
as
    of _r_debug_extended, for programs which reference _r_debug.

    This fixes BZ #15971.

    Reviewed-by: Florian Weimer <fweimer@redhat.com>

--=20
You are receiving this mail because:
You are on the CC list for the bug.=