57   struct MemBlockHdr *pNext, *pPrev;  /* Linked list of all unfreed memory */  member
260     pHdr->pNext = 0;  in sqlite3MemMalloc()
263       mem.pLast->pNext = pHdr;  in sqlite3MemMalloc()
312     assert( pHdr->pPrev->pNext==pHdr );  in sqlite3MemFree()
313     pHdr->pPrev->pNext = pHdr->pNext;  in sqlite3MemFree()
316     mem.pFirst = pHdr->pNext;  in sqlite3MemFree()
318   if( pHdr->pNext ){  in sqlite3MemFree()
319     assert( pHdr->pNext->pPrev==pHdr );  in sqlite3MemFree()
320     pHdr->pNext->pPrev = pHdr->pPrev;  in sqlite3MemFree()
465   for(pHdr=mem.pFirst; pHdr; pHdr=pHdr->pNext){  in sqlite3MemdebugSync()
487   for(pHdr=mem.pFirst; pHdr; pHdr=pHdr->pNext){  in sqlite3MemdebugDump()