Package: systemtap
Version: 4.8-2
Severity: normal
X-Debbugs-Cc: kuisma.juho+deb...@gmail.com
Hey,
running stap on a fresh install after stap-prep will always produce
warnings, which break some of the stap functionality:
$ stap test.stp
WARNING: Kernel function symbol table missing [man warning::symbols]
stap looks for the symbols at:
$ strace stap test.stp 2>&1 | grep System.map
openat(AT_FDCWD, "/lib/modules/6.1.0-10-amd64/build/System.map",
O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/boot/System.map-6.1.0-10-amd64", O_RDONLY) = 3
where the latter just contains:
$ cat /boot/System.map-6.1.0-10-amd64
ffffffffffffffff B The real System.map is in the
linux-image-<version>-dbg package
i.e., the symbols are actually available at:
$ dpkg -L linux-image-6.1.0-10-amd64-dbg | grep System.map
/usr/lib/debug/boot/System.map-6.1.0-10-amd64
but stap does not know this. I can get this working locally with:
$ sudo cp /proc/kallsyms /boot/System.map-$(uname -r)
But this can't be the official solution for obvious reasons. See:
https://sourceware.org/systemtap/man/warning::symbols.7stap.html
https://wiki.archlinux.org/title/SystemTap#System.map_is_missing
For reference, stap works out of the box without stap-prep on Fedora 38.
There:
$ strace stap test.stp 2>&1 | grep System.map
openat(AT_FDCWD,
"/lib/modules/6.3.11-200.fc38.x86_64/build/System.map", O_RDONLY) = 3
$ rpm -qf /lib/modules/6.3.11-200.fc38.x86_64/build/System.map
kernel-devel-6.3.11-200.fc38.x86_64
Cheers,
Juho Kuisma
-- System Information:
Debian Release: 12.0
APT prefers stable-security
APT policy: (500, 'stable-security'), (500, 'stable-debug'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 6.1.0-10-amd64 (SMP w/4 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) (ignored: LC_ALL
set to en_GB.UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages systemtap depends on:
ii libavahi-client3 0.8-10
ii libavahi-common3 0.8-10
ii libc6 2.36-9
ii libdw1 0.188-2.1
ii libelf1 0.188-2.1
ii libgcc-s1 12.2.0-14
ii libnspr4 2:4.35-1
ii libnss3 2:3.87.1-1
ii libsqlite3-0 3.40.1-2
ii libstdc++6 12.2.0-14
ii lsb-release 12.0-1
ii make 4.3-4.1
ii python3 3.11.2-1+b1
ii systemtap-common 4.8-2
ii systemtap-runtime 4.8-2
systemtap recommends no packages.
Versions of packages systemtap suggests:
ii systemtap-doc 4.8-2
pn vim-addon-manager <none>
-- no debconf information
