[Bug tapsets/19070] New: Call to __ustack_raw(0) causes 'Unknown symbol in module' on rhel6-

["mcermak at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19070

            Bug ID: 19070
           Summary: Call to __ustack_raw(0) causes 'Unknown symbol in
                    module' on rhel6-
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: tapsets
          Assignee: systemtap at sourceware dot org
          Reporter: mcermak at redhat dot com
  Target Milestone: ---

Call to __ustack_raw(0) causes 'Unknown symbol in module' on rhel6 and older
kernels (all arches):

=======
 6.7 S x86_64 # stap --poison-cache -e 'probe
oneshot{println(__ustack_raw(0))}'
WARNING: "uprobe_get_pc"
[/tmp/stapJi1kb4/stap_45d1c4a66fbffea13ac8a0c88df0581e_1588.ko] undefined!
ERROR: Couldn't insert module
'/tmp/stapJi1kb4/stap_45d1c4a66fbffea13ac8a0c88df0581e_1588.ko': Unknown symbol
in module
WARNING: /root/mcermak-systemtap/systemtap-build/bin/staprun exited with
status: 1
Pass 5: run failed.  [man error::pass5]
 6.7 S x86_64 #
=======

Using unoptimized mode (-u) helps here.

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