1 files changed, 51 insertions, 0 deletions
diff --git a/xpcom/base/DebuggerOnGCRunnable.cpp b/xpcom/base/DebuggerOnGCRunnable.cpp
new file mode 100644
index 0000000000..bcb13b3226
--- /dev/null
+++ b/xpcom/base/DebuggerOnGCRunnable.cpp
@@ -0,0 +1,51 @@
+/* -*- 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 <utility>
+
+#include "js/Debug.h"
+#include "mozilla/CycleCollectedJSContext.h"
+#include "mozilla/dom/ScriptSettings.h"
+#include "mozilla/SchedulerGroup.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 SchedulerGroup::Dispatch(TaskCategory::GarbageCollection,
+                                    runOnGC.forget());
+  } else {
+    return NS_DispatchToCurrentThread(runOnGC);
+  }
+}
+
+NS_IMETHODIMP
+DebuggerOnGCRunnable::Run() {
+  dom::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