[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

David Smith <dsmith at redhat dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |dsmith at redhat dot com

--- Comment #27 from David Smith <dsmith at redhat dot com> 2012-08-14 22:10:16 UTC ---
(In reply to comment #26)
> Created attachment 6578 [details]
> patch that sets IP before calling probe handler
> 
> (In reply to comment #25)
> > Srikar advises that the uprobes_get_bkpt_addr() function may be just the
> > ticket to compute the real probe virtual address at run time.
> 
> It looks like uprobes_get_bkpt_addr() has been renamed uprobe_get_swbp_addr().
> 
> Here's a patch, that I've done a quick test on, that seems to work.  Anyone got
> any ideas on the best way to test this?

When exelib.exp is run, I see no difference with or without the patch.

====
Running ../../src/testsuite/systemtap.exelib/exelib.exp ...
FAIL: uprobeslibgcc-O3-m64-prelink-debug prelink
./libuprobeslibgcc-O3-m64-prelink-debug.so
FAIL: uprobeslibgcc-O3-m64-prelink-sep-debug prelink
./libuprobeslibgcc-O3-m64-prelink-sep-debug.so
FAIL: uprobeslibgcc-O3-m64-prelink-sep-debug-after prelink
./libuprobeslibgcc-O3-m64-prelink-sep-debug-after.so

        === systemtap Summary ===

# of expected passes        185
# of unexpected failures    3
====

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
====

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