ProfFunction
callerp = (ProfFunction *)((char *)cgp + caller_off);
ProfFunction prof_func;
if (fwrite(&prof_func, sizeof (ProfFunction),
ProfFunction *calleep, *callerp;
calleep = (ProfFunction *)((char *)cgp + callee_off);
#define PROFFUNC_SZ (CEIL(sizeof (ProfFunction), STRUCT_ALIGN))
#define FUNC_FILLER (PROFFUNC_SZ - sizeof (ProfFunction))