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Overview
| Comment: | Make sure the Btree mutex is held when setting the locking mode and the secure delete flag when attaching a shared-cache database. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | threadtest4 |
| Files: | files | file ages | folders |
| SHA1: | 6bef7ede2bbf0a51729e1943b0b0c895cb57c718 |
| User & Date: | drh 2014-12-12 00:40:58 |
Context
|
2014-12-12
| ||
| 00:52 | Remove the KeyInfo cache (for now - perhaps we will add it back in later - or maybe not since it provides negligible benefit but adds a lot of complexity and thread-safety risk). Add a mutex to ATTACH to deal with a data race. check-in: 03c443ea user: drh tags: trunk | |
| 00:40 | Make sure the Btree mutex is held when setting the locking mode and the secure delete flag when attaching a shared-cache database. Closed-Leaf check-in: 6bef7ede user: drh tags: threadtest4 | |
| 00:26 | Merge the cell overflow page number cache thread race fix from trunk. check-in: cefad47e user: drh tags: threadtest4 | |
Changes
Changes to src/attach.c.
146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 |
if( !aNew->pSchema ){
rc = SQLITE_NOMEM;
}else if( aNew->pSchema->file_format && aNew->pSchema->enc!=ENC(db) ){
zErrDyn = sqlite3MPrintf(db,
"attached databases must use the same text encoding as main database");
rc = SQLITE_ERROR;
}
pPager = sqlite3BtreePager(aNew->pBt);
sqlite3PagerLockingMode(pPager, db->dfltLockMode);
sqlite3BtreeSecureDelete(aNew->pBt,
sqlite3BtreeSecureDelete(db->aDb[0].pBt,-1) );
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
sqlite3BtreeSetPagerFlags(aNew->pBt, 3 | (db->flags & PAGER_FLAGS_MASK));
#endif
}
aNew->safety_level = 3;
aNew->zName = sqlite3DbStrDup(db, zName);
if( rc==SQLITE_OK && aNew->zName==0 ){
rc = SQLITE_NOMEM;
}
|
> > |
146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 |
if( !aNew->pSchema ){
rc = SQLITE_NOMEM;
}else if( aNew->pSchema->file_format && aNew->pSchema->enc!=ENC(db) ){
zErrDyn = sqlite3MPrintf(db,
"attached databases must use the same text encoding as main database");
rc = SQLITE_ERROR;
}
sqlite3BtreeEnter(aNew->pBt);
pPager = sqlite3BtreePager(aNew->pBt);
sqlite3PagerLockingMode(pPager, db->dfltLockMode);
sqlite3BtreeSecureDelete(aNew->pBt,
sqlite3BtreeSecureDelete(db->aDb[0].pBt,-1) );
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
sqlite3BtreeSetPagerFlags(aNew->pBt, 3 | (db->flags & PAGER_FLAGS_MASK));
#endif
sqlite3BtreeLeave(aNew->pBt);
}
aNew->safety_level = 3;
aNew->zName = sqlite3DbStrDup(db, zName);
if( rc==SQLITE_OK && aNew->zName==0 ){
rc = SQLITE_NOMEM;
}
|