4827       int nMap = szRegion*nShmPerMap;  in unixShmMap()  local
4831         pMem = osMmap(0, nMap,  in unixShmMap()
4840         pMem = sqlite3_malloc64(nMap);  in unixShmMap()
4845         memset(pMem, 0, nMap);  in unixShmMap()
5237 static int unixMapfile(unixFile *pFd, i64 nMap){  in unixMapfile()  argument
5238   assert( nMap>=0 || pFd->nFetchOut==0 );  in unixMapfile()
5239   assert( nMap>0 || (pFd->mmapSize==0 && pFd->pMapRegion==0) );  in unixMapfile()
5242   if( nMap<0 ){  in unixMapfile()
5247     nMap = statbuf.st_size;  in unixMapfile()
5249   if( nMap>pFd->mmapSizeMax ){  in unixMapfile()
5250     nMap = pFd->mmapSizeMax;  in unixMapfile()
5253   assert( nMap>0 || (pFd->mmapSize==0 && pFd->pMapRegion==0) );  in unixMapfile()
5254   if( nMap!=pFd->mmapSize ){  in unixMapfile()
5255     unixRemapfile(pFd, nMap);  in unixMapfile()