[Bug runtime/14026] inode-uprobes should compute proper SET_REG_IP before probe invocation

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

http://sourceware.org/bugzilla/show_bug.cgi?id=14026

--- Comment #30 from David Smith <dsmith at redhat dot com> 2012-08-15 14:08:57 UTC ---
(In reply to comment #28)
> (In reply to comment #27) 
> > The 3 failures are all prelink failures, of the form:
> > 
> > ====
> > prelink failed: /usr/sbin/prelink: Could not set security context for
> > ./libuprobeslibgcc-O3-m64-prelink-sep-debug-after.so: Operation not supported
> > ====
> 
> Is that on NFS? I believe that case has a bug (either kernel/selinux or
> prelink).

Yes, this was on NFS.

> You might want to try testsuite/systemtap.context/uprobe_uaddr.exp which should
> test this case more precisely.

I get the same results with and without the patch.  Looking at the test, it
uses uretprobes, which of course don't work with inode uprobes.

====
Running ../../src/testsuite/systemtap.context/uprobe_uaddr.exp ...
FAIL: uprobe_uaddr (0)
FAIL: uprobe_uaddr match line 0 main+* 
FAIL: uprobe_uaddr match line 1 func+* 
FAIL: uprobe_uaddr match line 2 func2+* 
FAIL: uprobe_uaddr match line 3 func+* 
FAIL: uprobe_uaddr match line 4 main+* 

        === systemtap Summary ===

# of expected passes        1
# of unexpected failures    6
====

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