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Fix SQLITE_SECURE_DELETE so that it overwrites content on the root pages

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of tables and indices that are dropped using the truncate optimization.

FossilOrigin-Name: 02ef972a56aab1e61786000283193165d3968842
This commit is contained in:
drh
2009-11-24 02:37:02 +00:00
parent a62bb8d4d7
commit 7ab641fb01
3 changed files with 16 additions and 14 deletions
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10
src/btree.c
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@@ -1475,7 +1475,9 @@ static void zeroPage(MemPage *pPage, int flags){
assert( sqlite3PagerGetData(pPage->pDbPage) == data );
assert( sqlite3PagerIswriteable(pPage->pDbPage) );
assert( sqlite3_mutex_held(pBt->mutex) );
/*memset(&data[hdr], 0, pBt->usableSize - hdr);*/
#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);
@@ -6855,9 +6857,9 @@ int sqlite3BtreeCreateTable(Btree *p, int *piTable, int flags){
*/
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
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;