633   int iPage,               /* The page we seek */  in walIndexPageRealloc()  argument
639   if( pWal->nWiData<=iPage ){  in walIndexPageRealloc()
640     sqlite3_int64 nByte = sizeof(u32*)*(iPage+1);  in walIndexPageRealloc()
648            sizeof(u32*)*(iPage+1-pWal->nWiData));  in walIndexPageRealloc()
650     pWal->nWiData = iPage+1;  in walIndexPageRealloc()
654   assert( pWal->apWiData[iPage]==0 );  in walIndexPageRealloc()
656     pWal->apWiData[iPage] = (u32 volatile *)sqlite3MallocZero(WALINDEX_PGSZ);  in walIndexPageRealloc()
657     if( !pWal->apWiData[iPage] ) rc = SQLITE_NOMEM_BKPT;  in walIndexPageRealloc()
659     rc = sqlite3OsShmMap(pWal->pDbFd, iPage, WALINDEX_PGSZ,   in walIndexPageRealloc()
660         pWal->writeLock, (void volatile **)&pWal->apWiData[iPage]  in walIndexPageRealloc()
662     assert( pWal->apWiData[iPage]!=0  in walIndexPageRealloc()
664          || (pWal->writeLock==0 && iPage==0) );  in walIndexPageRealloc()
665     testcase( pWal->apWiData[iPage]==0 && rc==SQLITE_OK );  in walIndexPageRealloc()
667       if( iPage>0 && sqlite3FaultSim(600) ) rc = SQLITE_NOMEM;  in walIndexPageRealloc()
676   *ppPage = pWal->apWiData[iPage];  in walIndexPageRealloc()
677   assert( iPage==0 || *ppPage || rc!=SQLITE_OK );  in walIndexPageRealloc()
682   int iPage,               /* The page we seek */  in walIndexPage()  argument
685   if( pWal->nWiData<=iPage || (*ppPage = pWal->apWiData[iPage])==0 ){  in walIndexPage()
686     return walIndexPageRealloc(pWal, iPage, ppPage);  in walIndexPage()
824   u32 iPage,                      /* Database page number for frame */  in walEncodeFrame()  argument
832   sqlite3Put4byte(&aFrame[0], iPage);  in walEncodeFrame()
971 static int walHash(u32 iPage){  in walHash()  argument
972   assert( iPage>0 );  in walHash()
974   return (iPage*HASHTABLE_HASH_1) & (HASHTABLE_NSLOT-1);  in walHash()
1133 static int walIndexAppend(Wal *pWal, u32 iFrame, u32 iPage){  in walIndexAppend()  argument
1172     for(iKey=walHash(iPage); sLoc.aHash[iKey]; iKey=walNextHash(iKey)){  in walIndexAppend()
1175     sLoc.aPgno[idx-1] = iPage;  in walIndexAppend()