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Add a description of access rules for the Schema object and lots of asserts

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to verify that the access rules are followed.

FossilOrigin-Name: ae8374af057b6e6546e9265148cfffe32fcb0849
This commit is contained in:
drh
2011-04-04 18:22:02 +00:00
parent f32021de6f
commit 2120608e0f
15 changed files with 112 additions and 27 deletions
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3
src/pragma.c
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@@ -388,6 +388,7 @@ void sqlite3Pragma(
sqlite3BeginWriteOperation(pParse, 0, iDb);
sqlite3VdbeAddOp2(v, OP_Integer, size, 1);
sqlite3VdbeAddOp3(v, OP_SetCookie, iDb, BTREE_DEFAULT_CACHE_SIZE, 1);
assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
pDb->pSchema->cache_size = size;
sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
}
@@ -690,6 +691,7 @@ void sqlite3Pragma(
*/
if( sqlite3StrICmp(zLeft,"cache_size")==0 ){
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
if( !zRight ){
returnSingleInt(pParse, "cache_size", pDb->pSchema->cache_size);
}else{
@@ -1110,6 +1112,7 @@ void sqlite3Pragma(
** Begin by filling registers 2, 3, ... with the root pages numbers
** for all tables and indices in the database.
*/
assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
pTbls = &db->aDb[i].pSchema->tblHash;
for(x=sqliteHashFirst(pTbls); x; x=sqliteHashNext(x)){
Table *pTab = sqliteHashData(x);