LttvHooks *before_chunk_traceset; /* Unset : NULL */
LttvHooks *before_chunk_trace; /* Unset : NULL */
LttvHooks *before_chunk_tracefile;/* Unset : NULL */
LttvHooks *before_chunk_traceset; /* Unset : NULL */
LttvHooks *before_chunk_trace; /* Unset : NULL */
LttvHooks *before_chunk_tracefile;/* Unset : NULL */