Usage of opstack functions from cm_fm.h

Dear Team,

I want to use below functions defined in cm_fm.h in my custom opcode to know the time taken by each opcode in milli secs and store it in a custom table

EXPORT_OP void pin_opstack_to_str(

        cm_op_info_t*           coip,

        char**                  strpp,

        int*                    lenp,

        pin_errbuf_t*           ebufp);

Please let me know how to call pin_opstack_to_str() function in my custom opcode. I couldn't find much information in documentation on its usage.

Does functions define with EXPORT_OP needs any additional steps to call from my custom opcode ?

I tried calling below, but opcode execution stops at this function and not going further.