I have a very simple dtrace script ( shown below ).

This script works on simple programs just fine.

 

Now I want to use this script on a large C++ executable.

The executable is 8.5 meg in size on a x86 platform.

This executable has more than 10 threads in it.

 

I try to execute that  the dtrace script and I get this error - 

 

./adc.d 24930

dtrace: failed to compile script  ./adc.d: line 7: failed to grab
process 24930

 

What is the error really trying to tell me ?

 

wr

#######################

 

#!/usr/sbin/dtrace -qs

BEGIN

{       flag =  1 ; }

 

END

{       flag = 0 ; }

pid$1:::entry

{

self->t[probefunc] = timestamp ;

}

 

pid$1:::return

/self->t[probefunc] && flag /

{       this->time = timestamp - self->t[probefunc] ;

        @[probefunc] = avg(this->time) ;

        self->t[probefunc] = 0 ;

}

 

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