https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92983
--- Comment #7 from Jeffrey A. Law <law at redhat dot com> ---
So I first took a clean RHEL 8.1 system with kernel-4.18.0-147 and verified
that this simple stap script would fail:
stap -p4 -e 'probe module("nfsv3").function("nfs3_commit_done") {
println($task) }'
Which barfs with something like this output:
semantic error: failed to retrieve location attribute for 'task' [man
error::dwarf]: identifier '$task' at <input>:1:62
dieoffset: 0x8068a from
/usr/lib/debug/lib/modules/4.18.0-105.el8.x86_64/kernel/fs/nfs/nfsv3.ko.debug
function: nfs3_commit_done at fs/nfs/nfs3proc.c:847:2 inlined by
nfs3_commit_done at fs/nfs/nfs3proc.c:840:12
source: probe module("nfsv3").function("nfs3_commit_done") {
println($task) }
I then rebuilt/reinstalled GCC with the patch in c#3, then rebuilt the kernel
with the updated GCC.
The simple stap script above is handled without error (generates a suitable .ko
file).
So it definitely helps. Richi, do you want to move forward with this?
