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Overview
| Comment: | Fix SQLITE_SECURE_DELETE so that it overwrites content on the root pages of tables and indices that are dropped using the truncate optimization. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
02ef972a56aab1e61786000283193165 |
| User & Date: | drh 2009-11-24 02:37:03 |
Context
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2009-11-24
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| 16:26 | Fix a tracing macro in the VDBE in the VColumn opcode. check-in: cb74b81b user: drh tags: trunk | |
| 02:37 | Fix SQLITE_SECURE_DELETE so that it overwrites content on the root pages of tables and indices that are dropped using the truncate optimization. check-in: 02ef972a user: drh tags: trunk | |
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2009-11-23
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| 21:23 | Make sure registers computed for the VFilter opcode are marked invalid after the VFilter opcode finishes. Ticket [16fbf14cb2]. check-in: 83dc7d38 user: drh tags: trunk | |
Changes
Changes to src/btree.c.
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u16 first; assert( sqlite3PagerPagenumber(pPage->pDbPage)==pPage->pgno ); assert( sqlite3PagerGetExtra(pPage->pDbPage) == (void*)pPage ); assert( sqlite3PagerGetData(pPage->pDbPage) == data ); assert( sqlite3PagerIswriteable(pPage->pDbPage) ); assert( sqlite3_mutex_held(pBt->mutex) ); /*memset(&data[hdr], 0, pBt->usableSize - hdr);*/ data[hdr] = (char)flags; first = hdr + 8 + 4*((flags&PTF_LEAF)==0 ?1:0); memset(&data[hdr+1], 0, 4); data[hdr+7] = 0; put2byte(&data[hdr+5], pBt->usableSize); pPage->nFree = pBt->usableSize - first; decodeFlags(pPage, flags); ................................................................................ /* ** Erase the given database page and all its children. Return ** the page to the freelist. */ static int clearDatabasePage( BtShared *pBt, /* The BTree that contains the table */ Pgno pgno, /* Page number to clear */ int freePageFlag, /* Deallocate page if true */ int *pnChange ){ MemPage *pPage; int rc; unsigned char *pCell; int i; assert( sqlite3_mutex_held(pBt->mutex) ); |
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u16 first; assert( sqlite3PagerPagenumber(pPage->pDbPage)==pPage->pgno ); assert( sqlite3PagerGetExtra(pPage->pDbPage) == (void*)pPage ); assert( sqlite3PagerGetData(pPage->pDbPage) == data ); assert( sqlite3PagerIswriteable(pPage->pDbPage) ); assert( sqlite3_mutex_held(pBt->mutex) ); #ifdef SQLITE_SECURE_DELETE memset(&data[hdr], 0, pBt->usableSize - hdr); #endif data[hdr] = (char)flags; first = hdr + 8 + 4*((flags&PTF_LEAF)==0 ?1:0); memset(&data[hdr+1], 0, 4); data[hdr+7] = 0; put2byte(&data[hdr+5], pBt->usableSize); pPage->nFree = pBt->usableSize - first; decodeFlags(pPage, flags); ................................................................................ /* ** Erase the given database page and all its children. Return ** the page to the freelist. */ static int clearDatabasePage( BtShared *pBt, /* The BTree that contains the table */ Pgno pgno, /* Page number to clear */ int freePageFlag, /* Deallocate page if true */ int *pnChange /* Add number of Cells freed to this counter */ ){ MemPage *pPage; int rc; unsigned char *pCell; int i; assert( sqlite3_mutex_held(pBt->mutex) ); |