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nsIContentChild.cpp
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/
nsIContentChild.cpp
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/* -*- 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 "nsIContentChild.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/DOMTypes.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/PermissionMessageUtils.h"
#include "mozilla/dom/TabChild.h"
#include "mozilla/dom/TabGroup.h"
#include "mozilla/dom/ipc/StructuredCloneData.h"
#include "mozilla/ipc/FileDescriptorSetChild.h"
#include "mozilla/ipc/InputStreamUtils.h"
#include "mozilla/ipc/IPCStreamAlloc.h"
#include "mozilla/ipc/IPCStreamDestination.h"
#include "mozilla/ipc/IPCStreamSource.h"
#include "mozilla/ipc/PChildToParentStreamChild.h"
#include "mozilla/ipc/PParentToChildStreamChild.h"
#include "mozilla/dom/ipc/IPCBlobInputStreamChild.h"
#include "nsPrintfCString.h"
#include "xpcpublic.h"
using namespace mozilla::ipc;
using namespace mozilla::jsipc;
namespace mozilla {
namespace dom {
PJavaScriptChild*
nsIContentChild::AllocPJavaScriptChild()
{
return NewJavaScriptChild();
}
bool
nsIContentChild::DeallocPJavaScriptChild(PJavaScriptChild* aChild)
{
ReleaseJavaScriptChild(aChild);
return true;
}
PBrowserChild*
nsIContentChild::AllocPBrowserChild(const TabId& aTabId,
const TabId& aSameTabGroupAs,
const IPCTabContext& aContext,
const uint32_t& aChromeFlags,
const ContentParentId& aCpID,
const bool& aIsForBrowser)
{
// We'll happily accept any kind of IPCTabContext here; we don't need to
// check that it's of a certain type for security purposes, because we
// believe whatever the parent process tells us.
MaybeInvalidTabContext tc(aContext);
if (!tc.IsValid()) {
NS_ERROR(nsPrintfCString("Received an invalid TabContext from "
"the parent process. (%s) Crashing...",
tc.GetInvalidReason()).get());
MOZ_CRASH("Invalid TabContext received from the parent process.");
}
RefPtr<TabChild> child =
TabChild::Create(this, aTabId, aSameTabGroupAs,
tc.GetTabContext(), aChromeFlags);
// The ref here is released in DeallocPBrowserChild.
return child.forget().take();
}
bool
nsIContentChild::DeallocPBrowserChild(PBrowserChild* aIframe)
{
TabChild* child = static_cast<TabChild*>(aIframe);
NS_RELEASE(child);
return true;
}
mozilla::ipc::IPCResult
nsIContentChild::RecvPBrowserConstructor(PBrowserChild* aActor,
const TabId& aTabId,
const TabId& aSameTabGroupAs,
const IPCTabContext& aContext,
const uint32_t& aChromeFlags,
const ContentParentId& aCpID,
const bool& aIsForBrowser)
{
// This runs after AllocPBrowserChild() returns and the IPC machinery for this
// PBrowserChild has been set up.
auto tabChild = static_cast<TabChild*>(static_cast<TabChild*>(aActor));
if (NS_WARN_IF(NS_FAILED(tabChild->Init()))) {
return IPC_FAIL(tabChild, "TabChild::Init failed");
}
nsCOMPtr<nsIObserverService> os = services::GetObserverService();
if (os) {
os->NotifyObservers(static_cast<nsITabChild*>(tabChild), "tab-child-created", nullptr);
}
return IPC_OK();
}
PIPCBlobInputStreamChild*
nsIContentChild::AllocPIPCBlobInputStreamChild(const nsID& aID,
const uint64_t& aSize)
{
// IPCBlobInputStreamChild is refcounted. Here it's created and in
// DeallocPIPCBlobInputStreamChild is released.
RefPtr<IPCBlobInputStreamChild> actor =
new IPCBlobInputStreamChild(aID, aSize);
return actor.forget().take();
}
bool
nsIContentChild::DeallocPIPCBlobInputStreamChild(PIPCBlobInputStreamChild* aActor)
{
RefPtr<IPCBlobInputStreamChild> actor =
dont_AddRef(static_cast<IPCBlobInputStreamChild*>(aActor));
return true;
}
PChildToParentStreamChild*
nsIContentChild::AllocPChildToParentStreamChild()
{
MOZ_CRASH("PChildToParentStreamChild actors should be manually constructed!");
}
bool
nsIContentChild::DeallocPChildToParentStreamChild(PChildToParentStreamChild* aActor)
{
delete aActor;
return true;
}
PParentToChildStreamChild*
nsIContentChild::AllocPParentToChildStreamChild()
{
return mozilla::ipc::AllocPParentToChildStreamChild();
}
bool
nsIContentChild::DeallocPParentToChildStreamChild(PParentToChildStreamChild* aActor)
{
delete aActor;
return true;
}
PFileDescriptorSetChild*
nsIContentChild::AllocPFileDescriptorSetChild(const FileDescriptor& aFD)
{
return new FileDescriptorSetChild(aFD);
}
bool
nsIContentChild::DeallocPFileDescriptorSetChild(PFileDescriptorSetChild* aActor)
{
delete static_cast<FileDescriptorSetChild*>(aActor);
return true;
}
mozilla::ipc::IPCResult
nsIContentChild::RecvAsyncMessage(const nsString& aMsg,
InfallibleTArray<CpowEntry>&& aCpows,
const IPC::Principal& aPrincipal,
const ClonedMessageData& aData)
{
NS_LossyConvertUTF16toASCII messageNameCStr(aMsg);
AUTO_PROFILER_LABEL_DYNAMIC("nsIContentChild::RecvAsyncMessage", EVENTS,
messageNameCStr.get());
CrossProcessCpowHolder cpows(this, aCpows);
RefPtr<nsFrameMessageManager> cpm = nsFrameMessageManager::GetChildProcessManager();
if (cpm) {
ipc::StructuredCloneData data;
ipc::UnpackClonedMessageDataForChild(aData, data);
cpm->ReceiveMessage(static_cast<nsIContentFrameMessageManager*>(cpm.get()), nullptr,
aMsg, false, &data, &cpows, aPrincipal, nullptr);
}
return IPC_OK();
}
/* static */
already_AddRefed<nsIEventTarget>
nsIContentChild::GetConstructedEventTarget(const IPC::Message& aMsg)
{
ActorHandle handle;
TabId tabId, sameTabGroupAs;
PickleIterator iter(aMsg);
if (!IPC::ReadParam(&aMsg, &iter, &handle)) {
return nullptr;
}
aMsg.IgnoreSentinel(&iter);
if (!IPC::ReadParam(&aMsg, &iter, &tabId)) {
return nullptr;
}
aMsg.IgnoreSentinel(&iter);
if (!IPC::ReadParam(&aMsg, &iter, &sameTabGroupAs)) {
return nullptr;
}
// If sameTabGroupAs is non-zero, then the new tab will be in the same
// TabGroup as a previously created tab. Rather than try to find the
// previously created tab (whose constructor message may not even have been
// processed yet, in theory) and look up its event target, we just use the
// default event target. This means that runnables for this tab will not be
// labeled. However, this path is only taken for print preview and view
// source, which are not performance-sensitive.
if (sameTabGroupAs) {
return nullptr;
}
// If the request for a new TabChild is coming from the parent process, then
// there is no opener. Therefore, we create a fresh TabGroup.
RefPtr<TabGroup> tabGroup = new TabGroup();
nsCOMPtr<nsIEventTarget> target = tabGroup->EventTargetFor(TaskCategory::Other);
return target.forget();
}
} // namespace dom
} // namespace mozilla