tools/dtrace/entry-counts.d

   1 /*
   2  * entry/exit counts
   3  *
   4  * This script manages a counter for every method invocation. Upon function-entry the probe increments
   5  * the counter, upon function-return the counter decrements the counter. At the end of the run
   6  * dtrace should print all methods run, with a count of 0 for all of them - indicating that the probes
   7  * have fired correctly.
   8  *
   9  * Example invocation:
  10  *
  11  * $> sudo dtrace -s entry-counts.d -c 'rbx ~/hello.rb'
  12  */
  13
  14 #pragma D option dynvarsize=250m
  15 #pragma D option bufsize=64m
  16 #pragma D option quiet
  17
  18 rubinius$target:::function-entry { @[copyinstr(arg0), copyinstr(arg1)] = sum(1); }
  19 rubinius$target:::function-return { @[copyinstr(arg0), copyinstr(arg1)] = sum(-1); }
  20