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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/vdbe.c
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@@ -2880,6 +2880,7 @@ case OP_SetCookie: { /* in3 */
assert( (p->btreeMask & (((yDbMask)1)<<pOp->p1))!=0 );
pDb = &db->aDb[pOp->p1];
assert( pDb->pBt!=0 );
assert( sqlite3SchemaMutexHeld(db, pOp->p1, 0) );
pIn3 = &aMem[pOp->p3];
sqlite3VdbeMemIntegerify(pIn3);
/* See note about index shifting on OP_ReadCookie */
@@ -2926,6 +2927,7 @@ case OP_VerifyCookie: {
assert( pOp->p1>=0 && pOp->p1<db->nDb );
assert( (p->btreeMask & (((yDbMask)1)<<pOp->p1))!=0 );
assert( sqlite3SchemaMutexHeld(db, pOp->p1, 0) );
pBt = db->aDb[pOp->p1].pBt;
if( pBt ){
sqlite3BtreeGetMeta(pBt, BTREE_SCHEMA_VERSION, (u32 *)&iMeta);
@@ -3036,6 +3038,7 @@ case OP_OpenWrite: {
assert( pX!=0 );
if( pOp->opcode==OP_OpenWrite ){
wrFlag = 1;
assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
if( pDb->pSchema->file_format < p->minWriteFileFormat ){
p->minWriteFileFormat = pDb->pSchema->file_format;
}