Test Build 4) All debug symbols disabled
goal: show no zfs debug symbol activity happens either (along w/ other
debug symbol stuff)
- test packaging
- nothing built with debug symbols
- no debug package present
- no .gnu_debuglink section at all
- (no regressions)
Test packaging, debug symbols disabled at all (skipdbg=true).
The dkms-build script doesn't do any debug symbol work at all.
II: dkms-build installing zfs into
/home/ubuntu/dbgsym/unstable/debian/linux-modules-5.3.0-8-generic/lib/modules/5.3.0-8-generic/kernel/zfs
signing zavl.ko
signing znvpair.ko
signing zunicode.ko
signing zcommon.ko
signing zfs.ko
signing icp.ko
signing zlua.ko
signing spl.ko
II: dkms-build build zfs complete
No debug sections are present in ZFS modules (as expected):
$ objdump -h deb-modules/lib/modules/5.3.0-8-generic/kernel/zfs/zfs.ko
| grep debug
$
And the check for modules without debug symbols is not exercised (as
expected):
$ grep WARNING build.log
$
$ find deb-modules/ -name '*.ko' | wc -l
1000
$ find deb-modules/ -name '*.ko' | while read ko; do objdump -h -j
.gnu_debuglink $ko >/dev/null 2>&1 || echo "Module without debug link '$ko'";
done | wc -l
1000
$ find deb-modules-extra/ -name '*.ko' | wc -l
4508
$ find deb-modules-extra/ -name '*.ko' | while read ko; do objdump -h -j
.gnu_debuglink $ko >/dev/null 2>&1 || echo "Module without debug link '$ko'";
done | wc -l
4508
** Description changed:
The ZFS kernel modules aren't built with debug symbols,
which introduces problems/issues for debugging/support.
Patches are required in:
1) linux kernel packaging, to add infrastructure to
enable/build/strip/package debug symbols on DKMS.
(this is sufficient with zfs-linux now in Eoan.)
2) zfs-linux and spl-linux, for the stable releases,
- which need a few patches to enable debug symbols.
+ which need a few patches to enable debug symbols
+ (add option './configure --enable-debuginfo' and
+ '(ZFS|SPL)_DKMS_ENABLE_DEBUGINFO' to dkms.conf.)
Initially submitting the kernel patchset for Unstable,
for review/feedback. It backports nicely into B/D/E,
should it be accepted; for X (doesn't use DKMS builds)
a simpler patch for the moment (until it does) works.
The zfs/spl-linux patches are ready, to be submitted
once the approach used by the kernel package settles.
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https://bugs.launchpad.net/bugs/1840704
Title:
ZFS kernel modules lack debug symbols
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