| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "third_party/blink/renderer/core/dom/mutation_observer.h" |
| |
| #include "testing/gtest/include/gtest/gtest.h" |
| #include "third_party/blink/renderer/core/dom/mutation_observer_init.h" |
| #include "third_party/blink/renderer/core/dom/mutation_observer_registration.h" |
| #include "third_party/blink/renderer/core/html/html_document.h" |
| #include "third_party/blink/renderer/core/html/html_element.h" |
| |
| namespace blink { |
| |
| namespace { |
| |
| class EmptyMutationCallback : public MutationObserver::Delegate { |
| public: |
| explicit EmptyMutationCallback(Document& document) : document_(document) {} |
| |
| ExecutionContext* GetExecutionContext() const override { return document_; } |
| |
| void Deliver(const MutationRecordVector&, MutationObserver&) override {} |
| |
| void Trace(Visitor* visitor) override { |
| visitor->Trace(document_); |
| MutationObserver::Delegate::Trace(visitor); |
| } |
| |
| private: |
| Member<Document> document_; |
| }; |
| |
| } // namespace |
| |
| TEST(MutationObserverTest, DisconnectCrash) { |
| Persistent<Document> document = HTMLDocument::CreateForTest(); |
| auto* root = ToHTMLElement(document->CreateRawElement(html_names::kHTMLTag)); |
| document->AppendChild(root); |
| root->SetInnerHTMLFromString("<head><title>\n</title></head><body></body>"); |
| Node* head = root->firstChild()->firstChild(); |
| DCHECK(head); |
| Persistent<MutationObserver> observer = MutationObserver::Create( |
| MakeGarbageCollected<EmptyMutationCallback>(*document)); |
| MutationObserverInit* init = MutationObserverInit::Create(); |
| init->setCharacterDataOldValue(false); |
| observer->observe(head, init, ASSERT_NO_EXCEPTION); |
| |
| head->remove(); |
| Persistent<MutationObserverRegistration> registration = |
| observer->registrations_.begin()->Get(); |
| // The following GC will collect |head|, but won't collect a |
| // MutationObserverRegistration for |head|. |
| ThreadState::Current()->CollectGarbage( |
| BlinkGC::kNoHeapPointersOnStack, BlinkGC::kAtomicMarking, |
| BlinkGC::kLazySweeping, BlinkGC::GCReason::kForcedGC); |
| observer->disconnect(); |
| // The test passes if disconnect() didn't crash. crbug.com/657613. |
| } |
| |
| } // namespace blink |
