gistfile1.d

/*
 To check for requests, just use an empty middleware, and check for call()s to it. In our case, use Rack::Probe. We can later  add more probes to log env data._
 This way requires a patched Ruby to be used though. mri_instrumentation must have a better way._
*/

    :::function-entry
    /copyinstr((int) arg0) == "Rack::Probe" && copyinstr((int) arg1) == "call"/
    {
     printf("Class: %s \t Method: %s\t", copyinstr((int) arg0), copyinstr((int) arg1));
     trace(timestamp); 
     printf("\n");
    }

    :::function-return
    /copyinstr((int) arg0) == "Rack::Probe" && copyinstr((int) arg1) == "call"/
    {
     printf("Class: %s \t Method: %s\t", copyinstr((int) arg0), copyinstr((int) arg1));
     trace(timestamp); 
     printf("\n");
    }