1 files changed, 123 insertions, 0 deletions
diff --git a/ipc/ipdl/test/gtest/TestDestroyNested.cpp b/ipc/ipdl/test/gtest/TestDestroyNested.cpp
new file mode 100644
index 0000000000..a348357b51
--- /dev/null
+++ b/ipc/ipdl/test/gtest/TestDestroyNested.cpp
@@ -0,0 +1,123 @@
+/* -*- 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/. */
+
+/*
+ * Test an actor being destroyed during another ActorDestroy.
+ */
+
+#include "gtest/gtest.h"
+
+#include "mozilla/_ipdltest/IPDLUnitTest.h"
+#include "mozilla/_ipdltest/PTestDestroyNestedChild.h"
+#include "mozilla/_ipdltest/PTestDestroyNestedParent.h"
+#include "mozilla/_ipdltest/PTestDestroyNestedSubChild.h"
+#include "mozilla/_ipdltest/PTestDestroyNestedSubParent.h"
+
+#include "mozilla/SpinEventLoopUntil.h"
+
+using namespace mozilla::ipc;
+
+namespace mozilla::_ipdltest {
+
+class TestDestroyNestedSubParent : public PTestDestroyNestedSubParent {
+  NS_INLINE_DECL_REFCOUNTING(TestDestroyNestedSubParent, override)
+
+  void ActorDestroy(ActorDestroyReason aReason) override;
+
+  bool mActorDestroyCalled = false;
+  bool mCloseManager = false;
+
+  nsrefcnt GetRefCnt() const { return mRefCnt; }
+
+ private:
+  ~TestDestroyNestedSubParent() = default;
+};
+
+class TestDestroyNestedSubChild : public PTestDestroyNestedSubChild {
+  NS_INLINE_DECL_REFCOUNTING(TestDestroyNestedSubChild, override)
+ private:
+  ~TestDestroyNestedSubChild() = default;
+};
+
+class TestDestroyNestedParent : public PTestDestroyNestedParent {
+  NS_INLINE_DECL_REFCOUNTING(TestDestroyNestedParent, override)
+
+  void ActorDestroy(ActorDestroyReason aReason) override;
+
+  bool mActorDestroyCalled = false;
+
+ private:
+  ~TestDestroyNestedParent() = default;
+};
+
+class TestDestroyNestedChild : public PTestDestroyNestedChild {
+  NS_INLINE_DECL_REFCOUNTING(TestDestroyNestedChild, override)
+
+  already_AddRefed<PTestDestroyNestedSubChild> AllocPTestDestroyNestedSubChild()
+      override {
+    return MakeAndAddRef<TestDestroyNestedSubChild>();
+  }
+
+ private:
+  ~TestDestroyNestedChild() = default;
+};
+
+void TestDestroyNestedSubParent::ActorDestroy(ActorDestroyReason aReason) {
+  // Destroy our manager from within ActorDestroy() and assert that we don't
+  // re-enter.
+  EXPECT_FALSE(mActorDestroyCalled) << "re-entered ActorDestroy()";
+  mActorDestroyCalled = true;
+
+  if (mCloseManager) {
+    EXPECT_FALSE(
+        static_cast<TestDestroyNestedParent*>(Manager())->mActorDestroyCalled)
+        << "manager already destroyed";
+    Manager()->Close();
+    EXPECT_TRUE(
+        static_cast<TestDestroyNestedParent*>(Manager())->mActorDestroyCalled)
+        << "manager successfully destroyed";
+  }
+
+  // Make sure we also process any pending events, because we might be spinning
+  // a nested event loop within `ActorDestroy`.
+  NS_ProcessPendingEvents(nullptr);
+}
+
+void TestDestroyNestedParent::ActorDestroy(ActorDestroyReason aReason) {
+  // Destroy our manager from within ActorDestroy() and assert that we don't
+  // re-enter.
+  EXPECT_FALSE(mActorDestroyCalled) << "re-entered ActorDestroy()";
+  mActorDestroyCalled = true;
+}
+
+IPDL_TEST(TestDestroyNested) {
+  auto p = MakeRefPtr<TestDestroyNestedSubParent>();
+  p->mCloseManager = true;
+  auto* rv1 = mActor->SendPTestDestroyNestedSubConstructor(p);
+  ASSERT_EQ(p, rv1) << "can't allocate Sub";
+
+  bool rv2 = PTestDestroyNestedSubParent::Send__delete__(p);
+  ASSERT_TRUE(rv2)
+  << "Send__delete__ failed";
+
+  ASSERT_TRUE(mActor->mActorDestroyCalled)
+  << "Parent not destroyed";
+  ASSERT_TRUE(p->mActorDestroyCalled)
+  << "Sub not destroyed";
+
+  ASSERT_EQ(p->GetRefCnt(), 1u) << "Outstanding references to Sub remain";
+
+  // Try to allocate a new actor under the already-destroyed manager, and ensure
+  // that it is destroyed as expected.
+  auto p2 = MakeRefPtr<TestDestroyNestedSubParent>();
+  auto* rv3 = mActor->SendPTestDestroyNestedSubConstructor(p2);
+  ASSERT_EQ(rv3, nullptr) << "construction succeeded unexpectedly";
+
+  ASSERT_TRUE(p2->mActorDestroyCalled)
+  << "Sub not destroyed";
+}
+
+}  // namespace mozilla::_ipdltest