[Bug runtime/12947] Use of hardware watchpoint causing oops

[wcohen at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12947

--- Comment #3 from William Cohen <wcohen at redhat dot com> 2011-06-29 15:56:54 UTC ---
Created attachment 5830
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5830
Ensure that the rc code is set when attempting to register a hw_breakpoint

The setup code for the hw_breakpoint doesn't check the return code. The problem
occurs later when there is an attempt to unregister the invalid hw_breakpoint.
This makes sure that rc gets propogated to minize the possibility of later
problems.

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