Worker: Protect a running debugger task from forcible worker termination

third_party/WebKit/Source/core/inspector/InspectorTaskRunner.cpp

 // Copyright 2015 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 "core/inspector/InspectorTaskRunner.h"
 
 namespace blink {
 
 InspectorTaskRunner::IgnoreInterruptsScope::IgnoreInterruptsScope(InspectorTaskRunner* taskRunner)
     : m_wasIgnoring(taskRunner->m_ignoreInterrupts)
@@ skipping 14 matching lines @@
 {
 }
 
 InspectorTaskRunner::~InspectorTaskRunner()
 {
 }
 
 void InspectorTaskRunner::appendTask(std::unique_ptr<Task> task)
 {
     MutexLocker lock(m_mutex);
+    if (m_killed)
+        return;
     m_queue.append(std::move(task));
     m_condition.signal();
 }
 
 std::unique_ptr<InspectorTaskRunner::Task> InspectorTaskRunner::takeNextTask(InspectorTaskRunner::WaitMode waitMode)
 {
     MutexLocker lock(m_mutex);
     bool timedOut = false;
 
     static double infiniteTime = std::numeric_limits<double>::max();
@@ skipping 33 matching lines @@
 
 void InspectorTaskRunner::v8InterruptCallback(v8::Isolate*, void* data)
 {
     InspectorTaskRunner* runner = static_cast<InspectorTaskRunner*>(data);
     if (runner->m_ignoreInterrupts)
         return;
     runner->runAllTasksDontWait();
 }
 
 } // namespace blink