From: "annulen at yandex dot ru" <sourceware-bugzilla@sourceware.org>
To: dwz@sourceware.org
Subject: [Bug default/26669] New: Use existing DWARF file as a reference for multifile mode
Date: Sun, 27 Sep 2020 11:42:02 +0000 [thread overview]
Message-ID: <bug-26669-11298@http.sourceware.org/bugzilla/> (raw)
https://sourceware.org/bugzilla/show_bug.cgi?id=26669
Bug ID: 26669
Summary: Use existing DWARF file as a reference for multifile
mode
Product: dwz
Version: unspecified
Status: UNCONFIRMED
Severity: enhancement
Priority: P2
Component: default
Assignee: nobody at sourceware dot org
Reporter: annulen at yandex dot ru
CC: dwz at sourceware dot org
Target Milestone: ---
I think it might be beneficial to add a modification to multifile mode,
allowing to "include" existing file as a "common file" and reference its DIEs
in file which is currently being optimized.
For example, there are Qt libraries, and we run dwz over all their debug info
and produce common file, e.g. qt_common.debug. This file contains information
about data types and macros which are commonly used in Qt APIs, so it's quite
likely that debug information of applications and libraries based on Qt will
also include same DIEs. So it seems to me that such feature would allow greater
deduplication of data while being scalable (each package can be optimized
separately)
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