xpcom/base/DebuggerOnGCRunnable.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/DebuggerOnGCRunnable.h"
   8
   9 #include <utility>
  10
  11 #include "js/Debug.h"
  12 #include "mozilla/CycleCollectedJSContext.h"
  13 #include "mozilla/dom/ScriptSettings.h"
  14 #include "mozilla/SchedulerGroup.h"
  15
  16 namespace mozilla {
  17
  18 /* static */
  19 nsresult DebuggerOnGCRunnable::Enqueue(JSContext* aCx,
  20                                        const JS::GCDescription& aDesc) {
  21   auto gcEvent = aDesc.toGCEvent(aCx);
  22   if (!gcEvent) {
  23     return NS_ERROR_OUT_OF_MEMORY;
  24   }
  25
  26   RefPtr<DebuggerOnGCRunnable> runOnGC =
  27       new DebuggerOnGCRunnable(std::move(gcEvent));
  28   if (NS_IsMainThread()) {
  29     return SchedulerGroup::Dispatch(TaskCategory::GarbageCollection,
  30                                     runOnGC.forget());
  31   } else {
  32     return NS_DispatchToCurrentThread(runOnGC);
  33   }
  34 }
  35
  36 NS_IMETHODIMP
  37 DebuggerOnGCRunnable::Run() {
  38   dom::AutoJSAPI jsapi;
  39   jsapi.Init();
  40   if (!JS::dbg::FireOnGarbageCollectionHook(jsapi.cx(), std::move(mGCData))) {
  41     return NS_ERROR_OUT_OF_MEMORY;
  42   }
  43   return NS_OK;
  44 }
  45
  46 nsresult DebuggerOnGCRunnable::Cancel() {
  47   mGCData = nullptr;
  48   return NS_OK;
  49 }
  50
  51 }  // namespace mozilla