get the cxx/tests/exceptions working. closes #377

git-svn-id: file:///svn/tokudb@2264 c7de825b-a66e-492c-adef-691d508d4ae1

cxx/tests/exceptions.cpp

@@ -49,16 +49,29 @@ void test_env_exceptions (void) {
     }
     {
 	DbEnv env(0);
-	TC(env.open(".", DB_INIT_MPOOL | DB_CREATE | DB_PRIVATE | DB_INIT_LOG, 0777),                  0);
+	TC(env.open(".", DB_INIT_MPOOL | DB_CREATE | DB_PRIVATE | DB_INIT_LOG, 0777),    0);
+	DbTxn *txn;
+	TC(env.txn_begin(0, &txn, 0),                                                    EINVAL); // not configured for transactions
+    }
+    {
+	DbEnv env(0);
+	TC(env.open(".", DB_INIT_MPOOL | DB_CREATE | DB_PRIVATE | DB_INIT_LOG | DB_INIT_TXN, 0777),    0);
 	DbTxn *txn;
 	TC(env.txn_begin(0, &txn, 0),                                                    0);
 	TC(txn->commit(0),                                                               0); 
         delete txn;
     }
-
     {
 	DbEnv env(0);
-	TC(env.open(".", DB_INIT_MPOOL | DB_CREATE | DB_PRIVATE | DB_INIT_LOG, 0777),    0);
+	TC(env.open(".", DB_INIT_MPOOL | DB_CREATE | DB_PRIVATE | DB_INIT_LOG | DB_INIT_LOCK | DB_INIT_TXN, 0777),    0);
+	DbTxn *txn;
+	TC(env.txn_begin(0, &txn, 0),                                                    0);
+	TC(txn->commit(0),                                                               0); 
+        delete txn;
+    }
+    {
+	DbEnv env(0);
+	TC(env.open(".", DB_INIT_MPOOL | DB_CREATE | DB_PRIVATE | DB_INIT_LOG | DB_INIT_TXN, 0777),    0);
 	DbTxn *txn;
 	TC(env.txn_begin(0, &txn, 0),                                                    0);
 	TC(txn->commit(-1),                                                              EINVAL);

src/ydb.c

@@ -889,6 +889,7 @@ static int toku_txn_begin(DB_ENV *env, DB_TXN * stxn, DB_TXN ** txn, u_int32_t f
         toku_free(result);
         return ENOMEM;
     }
+    memset(result->i, 0, sizeof *result->i);
     result->i->parent = stxn;
 
     int r;