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→Step 5 - Compiling a D-Trace Script
D-Trace scripts are .d files that allow the user to interact with the existing probes and do innovative things. If a programmer tends to add new probes to the Mozilla code base, they can use a script to pick up on it to make sure it was implemented and interacted properly.
With your terminal that isn't handling Mozilla Minefield, go to your mozilla home directory , create a file called js_callcount.d and paste this code into it.
<pre>#pragma D option quiet