search for: vframe_index

...l frames. DTrace would then loop over the vframe_count (likely to some hard-set maximum limit) and invoke a new helper, ''dtrace:helper:ustack:vstack'', which would be provided by the application. The helper would be invoked with a variable containing the loop index, ''vframe_index'', and would return a string that describes that particular virtual (inlined) frame, similar to the traditional ustack helper. We believe that these modifications to the ustack mechanism are safe, efficient, backwards-compatible, and minimally-intrusive. They would provide some flexibi...