Public bug reported:
My desktop runs Ubuntu precise with linux kernel 3.2.0-24-generic-pae
(i686), and I have installed the relevant linux-image-$(uname -r)-dbgsym
package from the ddebs repository.
When I run the command "sudo stap --vp 00001 -e 'probe vfs.read {
print("hello from read\n"); exit()}'" in bash, it finally gets an error
in Pass 5, saying "ERROR: Build-id mismatch: "kernel" vs.
"vmlinux-3.2.0-24-generic-pae" byte 0 (0x54 vs 0xc9) address 0xc15b0850
rc 0".
Then I check the vmlinux-3.2.0-24-generic-pae file with the command
"readelf -x .notes /usr/lib/debug/boot/vmlinux-3.2.0-24-generic-pae",
which shows the value at the address 0xc15b0850 is 0x54. Seems this
value (build-id) in vmlinux-3.2.0-24-generic-pae is not equal to that in
the running kernel.
BTW, when I try to run "sudo stap --vp 00001 -e 'probe vfs.read {
print("hello from read\n"); exit()}'", it generates lots of WARNINGS,
saying "WARNING: cannot find module sunrpc debuginfo: No DWARF
information found" and "WARNING: cannot find module nfs debuginfo: No
DWARF information found". Even after I setup the .debug-id folder under
/usr/lib/debug/ as the instructions at
http://sourceware.org/systemtap/wiki/SystemtapOnUbuntu, the WARNINGs
remain. Seems systemtap doesn't look for the module debug info from
/usr/lib/debug/ directory.
** Affects: systemtap (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/996364
Title:
systemtap reports error 'Build-id mismatch'
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/systemtap/+bug/996364/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
