cyc_coverage
static cyc_coverage_t cyc_coverage[CY_NCOVERAGE];
if (cyc_coverage[ndx].cyv_why == why)
if (cyc_coverage[ndx].cyv_why != NULL ||
atomic_cas_ptr(&cyc_coverage[ndx].cyv_why, NULL, why) !=
cyc_coverage[ndx].cyv_passive_count++;
cyc_coverage[ndx].cyv_count[level]++;
cyc_coverage[ndx].cyv_arg0 = arg0;
cyc_coverage[ndx].cyv_arg1 = arg1;