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In order to aid in debugging and monitoring internal behavior,
the GNU C Library exposes nearly-zero-overhead SystemTap probes marked with
the libc provider.
These probes are not part of the GNU C Library stable ABI, and they are subject to change or removal across releases. Our only promise with regard to them is that, if we find a need to remove or modify the arguments of a probe, the modified probe will have a different name, so that program monitors relying on the old probe will not get unexpected arguments.