Red Hat Bugzilla – Bug 646870
misaddresed user-space probes on prelinked shared libraries on i686 (REL)
Last modified: 2011-07-21 07:11:08 EDT
Due to a suspected problem in the way systemtap/elfutils
compute PC addresses to place int3 probe breakpoints into
prelinked shared libraries, sometimes the wrong instruction
is modified. This can lead to lost probes, or segmentation
violations, or more subtle errors. This problem appears to
exist in all versions of systemtap.
"prelink -u /usr/lib/libFOO.so" corrects the miscalculations,
as a temporary workaround.
This issue is being tracked upstream at
A future refresh of systemtap can update its bundled elfutils to version 0.150 to fix this problem.
Please copy notes from bug #652858, which fixed the corresponding issues in RHEL6.
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.