| <!DOCTYPE html> |
| <script src="../../fast/js/resources/js-test-pre.js"></script> |
| <script src="resources/shared.js"></script> |
| <script> |
| |
| description("Verify that that cursors weakly hold script value properties"); |
| |
| indexedDBTest(prepareDatabase, onOpen); |
| function prepareDatabase(evt) |
| { |
| db = event.target.result; |
| store = db.createObjectStore('store'); |
| store.put({value: 'value'}, ['key']); |
| } |
| |
| function onOpen(evt) |
| { |
| // evalAndLog() is not used as that generates new DOM nodes. |
| |
| db = evt.target.result; |
| tx = db.transaction('store'); |
| store = tx.objectStore('store'); |
| cursorRequest = store.openCursor(); |
| cursorRequest.onsuccess = function() { |
| cursor = cursorRequest.result; |
| }; |
| tx.oncomplete = function() { |
| db.close(); |
| |
| // Try and induce a leak by a reference cycle from DOM to V8 and back. |
| // If the v8 value of cursor.key (etc) is only held by the cursor's |
| // V8 wrapper then there will be no leak. |
| cursor.key.cursor = cursor; |
| cursor.primaryKey.cursor = cursor; |
| cursor.value.cursor = cursor; |
| |
| // IDB objects are not exposed, so hang a canary node off the cursor. |
| cursor.node = document.createElement('span'); |
| |
| gc(); |
| gc(); // FIXME: Calling twice should not be necessary. |
| numberOfNodesBefore = window.internals && window.internals.numberOfLiveNodes(); |
| |
| cursorRequest = null; |
| cursor = null; |
| |
| gc(); |
| gc(); // FIXME: Calling twice should not be necessary. |
| numberOfNodesAfter = window.internals && window.internals.numberOfLiveNodes(); |
| |
| shouldBe("numberOfNodesAfter", "numberOfNodesBefore - 1"); |
| finishJSTest(); |
| }; |
| } |
| |
| |
| </script> |
| <script src="../../fast/js/resources/js-test-post.js"></script> |
