Public bug reported:
Due to ubuntu kernel (Ubuntu 4.13.0-36.40-generic 4.13.13) being
compiled with ""-fno-var-tracking-assignments", the debug symbols
produced are of lesser quality, i.e. $context variables are not
available.
E.g.: (systemtap needs to be installed on the system)
$> stap -L 'kernel.function("reparent_leader")'
kernel.function("reparent_leader@/build/linux-r9581B/linux-4.13.0/kernel/exit.c:632")
on Fedora (Linux 4.15.6-300.fc27.x86_64) the same command gives:
kernel.function("reparent_leader@kernel/exit.c:632") $dead:struct list_head*
$p:struct task_struct* $father:struct task_struct*
more info:
SystemTap Release notes (known issues)
https://sourceware.org/ml/systemtap/2017-q4/msg00096.html
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1754078
Title:
reenable full variable debugging information within dbgsyms with gcc
vta cflags
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