xpcom/base/DebuggerOnGCRunnable.cpp
author Brian Hackett <bhackett1024@gmail.com>
Wed, 14 Nov 2018 16:09:58 -1000
changeset 446931 1c7fc8389e012c987347efefca6b35f3948b742a
parent 429889 080d6b5d32e207b5d4c7a4018354828b8c78859b
child 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1507359 Part 2 - Bindings and internal changes to allow ReplayDebugger to control child pausing/resuming, r=mccr8.

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "mozilla/DebuggerOnGCRunnable.h"

#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/CycleCollectedJSContext.h"
#include "mozilla/Move.h"
#include "mozilla/SystemGroup.h"
#include "js/Debug.h"

namespace mozilla {

/* static */ nsresult
DebuggerOnGCRunnable::Enqueue(JSContext* aCx, const JS::GCDescription& aDesc)
{
  auto gcEvent = aDesc.toGCEvent(aCx);
  if (!gcEvent) {
    return NS_ERROR_OUT_OF_MEMORY;
  }

  RefPtr<DebuggerOnGCRunnable> runOnGC =
    new DebuggerOnGCRunnable(std::move(gcEvent));
  if (NS_IsMainThread()) {
    return SystemGroup::Dispatch(TaskCategory::GarbageCollection, runOnGC.forget());
  } else {
    return NS_DispatchToCurrentThread(runOnGC);
  }
}

NS_IMETHODIMP
DebuggerOnGCRunnable::Run()
{
  AutoJSAPI jsapi;
  jsapi.Init();
  if (!JS::dbg::FireOnGarbageCollectionHook(jsapi.cx(), std::move(mGCData))) {
    return NS_ERROR_OUT_OF_MEMORY;
  }
  return NS_OK;
}

nsresult
DebuggerOnGCRunnable::Cancel()
{
  mGCData = nullptr;
  return NS_OK;
}

} // namespace mozilla