dtrace problems

README.markdown

I can't seem to get this dtrace probe to work

I'm trying to implement a dtrace probe that takes a char * argument. Everything compiles fine, but when I run the dtrace script, I get this error:

dtrace: failed to compile script timing.d: line 3: printf( ) argument #2 is incompatible with conversion #1 prototype:
	conversion: %s
	 prototype: char [] or string (or use stringof)
	  argument: int64_t
make: *** [test] Error 1

To reproduce:

$ make clean
$ make test

aaron.c

#include <stdio.h>
#include "probes.h"

long primes[1000000] = { 3 };
long primecount = 1;

int main(int argc, char **argv)
{
  long divisor = 0;
  long currentprime = 5;
  long isprime = 1;

  while (currentprime < 1000000)
    {
      isprime = 1;
      PRIMES_PRIMECALC_START(currentprime);
      for(divisor=0;divisor<primecount;divisor++)
        {
          if (currentprime % primes[divisor] == 0)
            {
              isprime = 0;
            }
        }
      PRIMES_PRIMECALC_DONE(currentprime,isprime);
      if (isprime)
        {
          primes[primecount++] = currentprime;
          PRIMES_PRIMECALC_TABLESIZE(primecount);
          PRIMES_PRIMECALC_NAME("this is a test");
        }
      currentprime = currentprime + 2;
    }

  return 0;
}

Makefile

all:
	dtrace -h -s probes.d
	gcc -Wall -O0 -I. -o aaron aaron.c

clean:
	rm probes.h
	rm aaron

test: all
	sudo dtrace -s timing.d -c './aaron'

probes.d

provider primes {

   probe primecalc__name(char* name);

/* Start of the prime calculation */

   probe primecalc__start(long prime);

/* End of the prime calculation */

   probe primecalc__done(long prime, int isprime);

/* Exposes the size of the table of existing primes */

   probe primecalc__tablesize(long tablesize);

};

timing.d

primes*:::primecalc-name
{
  printf("%s\n", arg0);
}

I have this problem now. Did you ever find a solution?