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 03F943858C51; Sun, 15 May 2022 19:04:05 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 03F943858C51
From: "mark at klomp dot org" <sourceware-bugzilla@sourceware.org>
To: elfutils-devel@sourceware.org
Subject: [Bug tools/29150] New: Would be useful to have a filter in
 eu-readelf like --name=<function>
Date: Sun, 15 May 2022 19:04:05 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: elfutils
X-Bugzilla-Component: tools
X-Bugzilla-Version: unspecified
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: mark at klomp dot 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: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter cc target_milestone
Message-ID: <bug-29150-10460@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: elfutils-devel@sourceware.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Elfutils-devel mailing list <elfutils-devel.sourceware.org>
List-Unsubscribe: <https://sourceware.org/mailman/options/elfutils-devel>,
 <mailto:elfutils-devel-request@sourceware.org?subject=unsubscribe>
List-Archive: <https://sourceware.org/pipermail/elfutils-devel/>
List-Help: <mailto:elfutils-devel-request@sourceware.org?subject=help>
List-Subscribe: <https://sourceware.org/mailman/listinfo/elfutils-devel>,
 <mailto:elfutils-devel-request@sourceware.org?subject=subscribe>
X-List-Received-Date: Sun, 15 May 2022 19:04:06 -0000

https://sourceware.org/bugzilla/show_bug.cgi?id=3D29150

            Bug ID: 29150
           Summary: Would be useful to have a filter in eu-readelf like
                    --name=3D<function>
           Product: elfutils
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: tools
          Assignee: unassigned at sourceware dot org
          Reporter: mark at klomp dot org
                CC: elfutils-devel at sourceware dot org
  Target Milestone: ---

Copied from https://bugzilla.redhat.com/show_bug.cgi?id=3D1980026

For large executables like the linux kernel the human readable output of
eu-readelf could be in the gigabytes.  llvm-dwarfdump has --name=3D<symbol_=
name>
that allows the output to be limited to just DIEs with that symbol name.  S=
o to
see the DIEs and their children (-c) of function trace_event_name for kernel
can do the following which is about 40K of output:

llvm-dwarfdump  -c --name=3Dtrace_event_name
/usr/lib/debug/lib/modules/5.12.7-300.fc34.x86_64/vmlinux >
trace_event_name.dwarf

Much easier to inspect 40KB of text than 4.8GB of the entire output from
llvm-dwarfdump.  Would be nice if eu-readelf had similar filter for
--debug-dump=3Dinfo and ability to select whether to print children DIEs.

Documentation about the llvm-dwarfdump options is at
https://llvm.org/docs/CommandGuide/llvm-dwarfdump.html .

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