Apple

Le 15 oct. 2009 à 17:07, Tomas Zahradnicky a écrit :

Dear Xcode Users,

after upgrading to Snow Leopard and Xcode Tools, I have noticed that my apps that use DTrace no longer work. I have looked at the generated assembly and I see nops properly placed in the code. Further digging revealed, that some of the probes are *disabled* despite they are defined in the .d file.

Since it worked in Leopard, I am suspecting a bug somewhere else, or someone sees a problem below?

This is how I call the probe:
   if( NFET_MAIN_START_ENABLED() ) { // <- this probe is always disabled despite enabled below!
     printf("enabled\n");
     NFET_MAIN_START();
   } else {
     printf("disabled\n");
   }
   sleep(1);//app->Run();
   NFET_MAIN_END();

This is how is the probe turned on in the .d file:
  nfet$target:::main-start
  {
   trace("main-start\n");
    self->ts = walltimestamp;
  }

  nfet$target:::main-end
  {
   trace("main-end\n");
   self->ts = walltimestamp - self->ts;
  }

This is how the probe is defined:
  provider nfet {
   probe main__start();
   probe main__end();
  };

This is how I run dtrace (dtrace: Sun D 1.6.2):
  sudo dtrace -qs src/probes.d -c './build/Release/nfet'

Best Regards,

  Tomas

References:
	>Snow Leopard's DTrace does not enable some probes? (From: Tomas Zahradnicky <email@hidden>)