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Drop any existing mapping of the database file when exiting the pager "error state", as it may at this point be too large for the database file. Do not invoke file-control MMAP_LIMIT if the database file handle does not support xFetch and xUnfetch (on the grounds that xUnfetch(0) calls to invalidate the mapping cannot be made).

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FossilOrigin-Name: 0ae7e75b215b0d75920769da9146c54ce2ad3ce0
This commit is contained in:
dan
2013-07-06 17:57:39 +00:00
parent c1f19f95b8
commit 789efdb966
5 changed files with 120 additions and 15 deletions
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5
src/pager.c
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@@ -1812,6 +1812,7 @@ static void pager_unlock(Pager *pPager){
pPager->changeCountDone = pPager->tempFile;
pPager->eState = PAGER_OPEN;
pPager->errCode = SQLITE_OK;
if( USEFETCH(pPager) ) sqlite3OsUnfetch(pPager->fd, 0, 0);
}
pPager->journalOff = 0;
@@ -3378,10 +3379,10 @@ void sqlite3PagerSetCachesize(Pager *pPager, int mxPage){
static void pagerFixMaplimit(Pager *pPager){
#if SQLITE_MAX_MMAP_SIZE>0
sqlite3_file *fd = pPager->fd;
if( isOpen(fd) ){
if( isOpen(fd) && fd->pMethods->iVersion>=3 ){
sqlite3_int64 sz;
pPager->bUseFetch = (fd->pMethods->iVersion>=3) && pPager->szMmap>0;
sz = pPager->szMmap;
pPager->bUseFetch = (sz>0);
sqlite3OsFileControlHint(pPager->fd, SQLITE_FCNTL_MMAP_SIZE, &sz);
}
#endif