[From nobody Mon Oct 5 20:29:07 2026 Received: (at submit) by bugs.debian.org; 29 Aug 2026 17:42:47 +0000 X-Spam-Checker-Version: SpamAssassin 4.0.1-bugs.debian.org_2005_01_02 (2024-03-25) on buxtehude.debian.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=4.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FOURLA,PGPSIGNATURE, RCVD_IN_DNSWL_MED,RCVD_IN_MSPIKE_H5,RCVD_IN_MSPIKE_WL,SPF_HELO_PASS, SPF_PASS autolearn=ham autolearn_force=no version=4.0.1-bugs.debian.org_2005_01_02 X-Spam-Bayes: score:0.0000 Tokens: new, 79; hammy, 150; neutral, 237; spammy, 0. spammytokens: hammytokens:0.000-+--H*Ad:N*Bug, 0.000-+--HTo:N*Debian, 0.000-+--HTo:N*System, 0.000-+--HTo:N*Bug, 0.000-+--HTo:N*Tracking Return-path: <jscott@posteo.net> Received: from mout02.posteo.de ([185.67.36.66]:42601) by buxtehude.debian.org with esmtps (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.96) (envelope-from <jscott@posteo.net>) id 1x0N4n-001Fzs-2k for 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Message-ID: <8cd1900ea54f69297e8f87e21b8145da8efea55f.camel@posteo.net> Subject: upstream's Valgrind suppressions and debugger helpers should be available in a package From: John Scott <jscott@posteo.net> To: Debian Bug Tracking System <submit@bugs.debian.org> Content-Type: multipart/signed; micalg="pgp-sha512"; protocol="application/pgp-signature"; boundary="=-Mv037xZTkKahehxtbF33" Date: Sat, 29 Aug 2026 17:42:40 +0000 MIME-Version: 1.0 Autocrypt: addr=jscott@posteo.net; keydata=xsFNBFzE2VsBEADAj1mv5RNr31Hy597sG0eAiTJkfOigNmVhV/53DGVJ6qll7FVHxTCT9SfzUAZ0 J9CQ9cRpOfhiD6RyFsj2n/IaIwYUuL5m5RffE6h28aefCwC6a5yP7b+jhCEVTJcvRQwgHxgOPlGM 1Iu+c8UtYQOUxZpJ2qIr6/FTYn/XZwdrUqWKESrCZw/WZoyOldz2gj1Et+hKn0KhVtSyWwGk9WzT C0TQmxv5qAtgzbQAO0YwR8T1woaBwioy2GneNzlyhXCFEK640yVHDAR3dqdPUI1Vnu+Zw2AZIruU umoSjwGnLktlvNTdMVt2KT2D9PNU3Kh87BJ4+nLAKVPHU0xpdkakk8DsXZw9oyBCdVXdtOL3HLDM xkLHyHtkinwxZ05OA3blp9Q3ZPyzqPsxhSGSiwH97W3LjKcbNOHZe+gBq7QJGD9TxFm6Do2sHX+I 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text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Source: webkit2gtk Version: 2.52.6-1 Severity: minor Tags: upstream I have discovered from reading https://docs.webkit.org/Build%20%26%20Debug/= DebuggingOnTheCommandLine.html that WebKit, like many major projects, has P= ython scripts for GDB and LLDB to enhance the experience of debugging WebKi= t. For example the GDB one provides "pretty-printers" for WebKit data struc= tures. This can be found at https://github.com/WebKit/WebKit/blob/main/Tool= s/gdb/webkit.py and it ought to be available in a Debian package of some ki= nd. This should be installed in a way so that GDB can discover it. GDB on Debian says > List of directories from which to load auto-loaded scripts is $debugdir:$= datadir/auto-load. > The directory where separate debug symbols are searched for is "/usr/lib/= debug". > GDB's data directory is "/usr/share/gdb". For Python in particular https://sourceware.org/gdb/current/onlinedocs/gdb.= html/Python.html says > Python scripts used by GDB should be installed in data-directory/python, = where data-directory is the data directory as determined at GDB startup (se= e Data Files). Therefore this webkit.py file should be available at /usr/share/gdb/python/= webkit.py for example. I would double-check if this is still best practice,= because as I will describe, other Debian packages handle this differently. The way that some other Debian packages are doing this is by installing the= script so that it has a name corresponding to the shared object it is inte= nded to affect, and therefore GDB can pick up on them: libc6-dev:amd64: /usr/share/gdb/auto-load/lib/x86_64-linux-gnu/libc.so.6-gd= b.py libgstreamer1.0-dev:amd64: /usr/share/gdb/auto-load/usr/lib/x86_64-linux-gn= u/libgstreamer-1.0.so.0.2602.0-gdb.py libglib2.0-dev:amd64: /usr/share/gdb/auto-load/usr/lib/x86_64-linux-gnu/lib= glib-2.0.so.0.8400.4-gdb.py libglib2.0-dev:amd64: /usr/share/gdb/auto-load/usr/lib/x86_64-linux-gnu/lib= gobject-2.0.so.0.8400.4-gdb.py This convention is documented at https://sourceware.org/gdb/current/onlined= ocs/gdb.html/objfile_002dgdbdotext-file.html An alternative option, to prevent having multiple copies of the same script= , is to use a special ELF section in the shared objects to tell GDB about a= path that can be used to *access* the Python script in the source tree. Th= is is articulated at=C2=A0https://sourceware.org/gdb/current/onlinedocs/gdb= .html/dotdebug_005fgdb_005fscripts-section.html One could set the .debug_gdb_scripts ELF section to reference Tools/gdb/web= kit.py for example, and then someone debugging WebKitGTK on Debian and who = has the source tree handy may pick that up. Note that this is less helpful = in Debian, as our debuginfod instance isn't capable of serving source files= at the moment. It's also possible to use the ELF section to include the GD= B script directly, which is appealing since it's not very long on this occa= sion. (The LLDB code at=C2=A0https://github.com/WebKit/WebKit/tree/main/Too= ls/lldb looks much more involved.) Upstream also has a Valgrind suppressions file=C2=A0https://github.com/WebK= it/WebKit/blob/main/Tools/Scripts/valgrind/suppressions.txt which will be h= elpful to folks developing WebKitGTK applications on Debian, and which shou= ld likewise be installed at a canonical system-wide location so it can be u= sed easily by folks who don't know they need it yet. The biggest hurdle here is that none of these files are shipped in the WebK= itGTK source tarball that is generated. Perhaps folks using these features = so far are mostly doing new development on WebKit itself from a Git checkou= t, and making these helpers installable by downstream distributors hasn't b= een a priority. In Debian it's normal to package these files, and we should= do so, somehow. -- System Information: Debian Release: 13.6 =C2=A0 APT prefers stable-updates =C2=A0 APT policy: (500, 'stable-updates'), (500, 'stable-security-debug'),= (500, 'stable-security'), (500, 'stable-debug'), (500, 'proposed-updates-d= ebug'), (500, 'proposed-updates'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 6.12.101+deb13-amd64 (SMP w/2 CPU threads; PREEMPT) Locale: LANG=3Den_US.UTF-8, LC_CTYPE=3Den_US.UTF-8 (charmap=3DUTF-8), LANGU= AGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled --=-Mv037xZTkKahehxtbF33 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- iPsEABYKAKMWIQSiPzylvTnZ6xisfzWz9N0oYfTNugUCapMaCXIYaHR0cHM6Ly9q b2huc2NvdHQubWUvLndlbGwta25vd24vbmkvc2hhLTI1Ni9zWUF3OTN6QUVrRkIy RDREM1hOemRSeHEyMFBjNnByZGdtbEVWeXo0QUZRP2N0PWFwcGxpY2F0aW9uJTJG cGdwLWtleXMSHGpzY290dEBwb3N0ZW8ubmV0AAoJELP03Shh9M26mk4BAPCpb1qt UNrFjvptSGREOCUZvNRoyANv0MXcjVKT0rJiAPwJdrp7mHjQwfebMNYPJfcBiprM doB1d4pMmBayRW4OBw== =G45M -----END PGP SIGNATURE----- --=-Mv037xZTkKahehxtbF33-- ]