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[Bug runtime/5637] Misaligned accesses in staprun for ia64 when stapio access denied


------- Additional Comments From wcohen at redhat dot com  2008-01-21 16:13 -------
The unaligned accessed happened on the latest cvs checkout done this morning.
Running on a 2.6.24-rc8 kernel.

Attempting to answer David's questions: 

- Got any ideas on why are we getting permission denied?
  I didn't see see "Permission denied" in the systemtap.log this time.

- What kernel are you running on this system?
  Kernel run on this machine have been 2.6.24-rc[78].

- What are the ownership/permissions on staprun/stapio?
$ pwd
/home/wcohen/stap_testing_200801210930/install/bin
$ ls -l
total 10732
-rwxr-xr-x 1 root root 10831404 Jan 21 04:36 stap
---s--x--x 1 root root   126559 Jan 21 04:36 staprun

$ pwd
/home/wcohen/stap_testing_200801210930/install/libexec/systemtap
$ ls -l
total 112
-rwxr-xr-x 1 root root 105247 Jan 21 04:37 stapio

- Are other tests getting unaligned access error or permission denied errors or
just this one?

Looks like most everything is getting the unaligned access error. Seaching for
through the systemtap.log for "Pass 5:" show the unaligned accesses on the
following lines. The unaligned accesses appear on most but not all staprun uses;
the systemtap.syscall tests do not appear to trigger the problem.

 

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=5637

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