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[Bug testsuite/10231] New: Systemtap vfs testcase fails on custom kernel built on RHEL 5.3 on ppc64


Systemtap testcase for vfs (testsuite/buildok/vfs_testcase.stp)fails on custom
kernel on RHEL 5.3 on ppc64

uname -a : Linux 2.6.30-rc5 #1 SMP Tue May 12 17:15:22 IST 2009 ppc64 ppc64
ppc64 GNU/Linux

SystemTap translator/driver (version 0.9.7/0.137 non-git sources)

(detailed output attached)

On reading the vmlinux with readelf, one finds that the function
parameters/context variables (which systemtap is unable to resolve) have valid
location details.
The error persists even on systemtap git sources built with elfutils-0.140.

Even a simple systemtap probe such as the following  :

# stap -vve 'probe kernel.function("generic_file_llseek"){printf("\n
%p",$file);}'

Fails with the following msg :
-------------------------------------------------------------------
SystemTap translator/driver (version 0.9.7/0.137 non-git sources)
Copyright (C) 2005-2009 Red Hat, Inc. and others
This is free software; see the source for copying conditions.
Session arch: ppc64 release: 2.6.30-rc5
Created temporary directory "/tmp/stapED7o0s"
Searched '/usr/local/share/systemtap/tapset/ppc64/*.stp', found 2
Searched '/usr/local/share/systemtap/tapset/*.stp', found 50
Pass 1: parsed user script and 52 library script(s) in 500usr/10sys/562real ms.
probe generic_file_llseek@fs/read_write.c:89 kernel reloc=.dynamic
section=.text pc=0xc00000000014e004
semantic error: not accessible at this address: identifier '$file' at
<input>:1:61
        source: probe kernel.function("generic_file_llseek"){printf("\n
%p",$file);}
                                                                            ^
Pass 2: analyzed script: 1 probe(s), 0 function(s), 0 embed(s), 0 global(s) in
550usr/960sys/1763real ms.
Pass 2: analysis failed.  Try again with another '--vp 01' option.
Running rm -rf /tmp/stapED7o0s
---------------------------------------------------------------------
The testcase runs successfully with distro kernel. It also passes on same kernel
built on a ppc64 fedora system.

-- 
           Summary: Systemtap vfs testcase fails on custom kernel built on
                    RHEL 5.3 on ppc64
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: testsuite
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: prerna at linux dot vnet dot ibm dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=10231

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