import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

embedding/components/webbrowserpersist/WebBrowserPersistDocumentParent.cpp

@@ -0,0 +1,125 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * 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 "WebBrowserPersistDocumentParent.h"
+
+#include "mozilla/ipc/InputStreamUtils.h"
+#include "nsIInputStream.h"
+#include "nsThreadUtils.h"
+#include "WebBrowserPersistResourcesParent.h"
+#include "WebBrowserPersistSerializeParent.h"
+#include "WebBrowserPersistRemoteDocument.h"
+
+namespace mozilla {
+
+WebBrowserPersistDocumentParent::WebBrowserPersistDocumentParent()
+: mReflection(nullptr)
+{
+}
+
+void
+WebBrowserPersistDocumentParent::SetOnReady(nsIWebBrowserPersistDocumentReceiver* aOnReady)
+{
+    MOZ_ASSERT(aOnReady);
+    MOZ_ASSERT(!mOnReady);
+    MOZ_ASSERT(!mReflection);
+    mOnReady = aOnReady;
+}
+
+void
+WebBrowserPersistDocumentParent::ActorDestroy(ActorDestroyReason aWhy)
+{
+    if (mReflection) {
+        mReflection->ActorDestroy();
+        mReflection = nullptr;
+    }
+    if (mOnReady) {
+        // Bug 1202887: If this is part of a subtree destruction, then
+        // anything which could cause another actor in that subtree to
+        // be Send__delete__()ed will cause use-after-free -- such as
+        // dropping the last reference to another document's
+        // WebBrowserPersistRemoteDocument.  To avoid that, defer the
+        // callback until after the entire subtree is destroyed.
+        nsCOMPtr<nsIRunnable> errorLater = NewRunnableMethod
+            <nsresult>(mOnReady, &nsIWebBrowserPersistDocumentReceiver::OnError,
+                       NS_ERROR_FAILURE);
+        NS_DispatchToCurrentThread(errorLater);
+        mOnReady = nullptr;
+    }
+}
+
+WebBrowserPersistDocumentParent::~WebBrowserPersistDocumentParent()
+{
+    MOZ_RELEASE_ASSERT(!mReflection);
+    MOZ_ASSERT(!mOnReady);
+}
+
+bool
+WebBrowserPersistDocumentParent::RecvAttributes(const Attrs& aAttrs,
+                                                const OptionalInputStreamParams& aPostData,
+                                                nsTArray<FileDescriptor>&& aPostFiles)
+{
+    // Deserialize the postData unconditionally so that fds aren't leaked.
+    nsCOMPtr<nsIInputStream> postData =
+        ipc::DeserializeInputStream(aPostData, aPostFiles);
+    if (!mOnReady || mReflection) {
+        return false;
+    }
+    mReflection = new WebBrowserPersistRemoteDocument(this, aAttrs, postData);
+    RefPtr<WebBrowserPersistRemoteDocument> reflection = mReflection;
+    mOnReady->OnDocumentReady(reflection);
+    mOnReady = nullptr;
+    return true;
+}
+
+bool
+WebBrowserPersistDocumentParent::RecvInitFailure(const nsresult& aFailure)
+{
+    if (!mOnReady || mReflection) {
+        return false;
+    }
+    mOnReady->OnError(aFailure);
+    mOnReady = nullptr;
+    // Warning: Send__delete__ deallocates this object.
+    return Send__delete__(this);
+}
+
+PWebBrowserPersistResourcesParent*
+WebBrowserPersistDocumentParent::AllocPWebBrowserPersistResourcesParent()
+{
+    MOZ_CRASH("Don't use this; construct the actor directly and AddRef.");
+    return nullptr;
+}
+
+bool
+WebBrowserPersistDocumentParent::DeallocPWebBrowserPersistResourcesParent(PWebBrowserPersistResourcesParent* aActor)
+{
+    // Turn the ref held by IPC back into an nsRefPtr.
+    RefPtr<WebBrowserPersistResourcesParent> actor =
+        already_AddRefed<WebBrowserPersistResourcesParent>(
+            static_cast<WebBrowserPersistResourcesParent*>(aActor));
+    return true;
+}
+
+PWebBrowserPersistSerializeParent*
+WebBrowserPersistDocumentParent::AllocPWebBrowserPersistSerializeParent(
+        const WebBrowserPersistURIMap& aMap,
+        const nsCString& aRequestedContentType,
+        const uint32_t& aEncoderFlags,
+        const uint32_t& aWrapColumn)
+{
+    MOZ_CRASH("Don't use this; construct the actor directly.");
+    return nullptr;
+}
+
+bool
+WebBrowserPersistDocumentParent::DeallocPWebBrowserPersistSerializeParent(PWebBrowserPersistSerializeParent* aActor)
+{
+    delete aActor;
+    return true;
+}
+
+} // namespace mozilla