gecko-dev/js/jetpack/JetpackParent.cpp

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/* -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 8 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Firefox.
*
* The Initial Developer of the Original Code is
* the Mozilla Foundation <http://www.mozilla.org>.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
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* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
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*
* ***** END LICENSE BLOCK ***** */
#include "mozilla/jetpack/JetpackParent.h"
#include "mozilla/jetpack/Handle.h"
#include "base/process_util.h"
#include "nsIURI.h"
#include "nsNetUtil.h"
#include "nsIVariant.h"
#include "nsIXPConnect.h"
#include "nsIJSContextStack.h"
#ifdef MOZ_CRASHREPORTER
#include "nsExceptionHandler.h"
#endif
namespace mozilla {
namespace jetpack {
JetpackParent::JetpackParent(JSContext* cx)
: mSubprocess(new JetpackProcessParent())
, mContext(cx)
, mTaskFactory(this)
{
mSubprocess->Launch();
Open(mSubprocess->GetChannel(),
mSubprocess->GetChildProcessHandle());
}
JetpackParent::~JetpackParent()
{
if (mSubprocess)
Destroy();
if (OtherProcess())
base::CloseProcessHandle(OtherProcess());
}
NS_IMPL_ISUPPORTS1(JetpackParent, nsIJetpack)
NS_IMETHODIMP
JetpackParent::SendMessage(const nsAString& aMessageName)
{
nsresult rv;
nsCOMPtr<nsIXPConnect> xpc(do_GetService(nsIXPConnect::GetCID(), &rv));
NS_ENSURE_SUCCESS(rv, rv);
nsAXPCNativeCallContext* ncc = NULL;
rv = xpc->GetCurrentNativeCallContext(&ncc);
NS_ENSURE_SUCCESS(rv, rv);
JSContext* cx;
rv = ncc->GetJSContext(&cx);
NS_ENSURE_SUCCESS(rv, rv);
PRUint32 argc;
rv = ncc->GetArgc(&argc);
NS_ENSURE_SUCCESS(rv, rv);
jsval* argv;
rv = ncc->GetArgvPtr(&argv);
NS_ENSURE_SUCCESS(rv, rv);
nsTArray<Variant> data;
NS_ENSURE_TRUE(data.SetCapacity(argc), NS_ERROR_OUT_OF_MEMORY);
JSAutoRequest request(cx);
JSAutoEnterCompartment ac;
if (!ac.enter(cx, JS_GetGlobalObject(cx)))
return false;
for (PRUint32 i = 1; i < argc; ++i) {
if (!JS_WrapValue(cx, &argv[i]) ||
!jsval_to_Variant(cx, argv[i], data.AppendElement())) {
return NS_ERROR_INVALID_ARG;
}
}
InfallibleTArray<Variant> dataForSend;
dataForSend.SwapElements(data);
if (!SendSendMessage(nsString(aMessageName), dataForSend))
return NS_ERROR_FAILURE;
return NS_OK;
}
NS_IMETHODIMP
JetpackParent::RegisterReceiver(const nsAString& aMessageName,
const jsval &aReceiver)
{
return JetpackActorCommon::RegisterReceiver(mContext,
nsString(aMessageName),
aReceiver);
}
NS_IMETHODIMP
JetpackParent::UnregisterReceiver(const nsAString& aMessageName,
const jsval &aReceiver)
{
JetpackActorCommon::UnregisterReceiver(nsString(aMessageName),
aReceiver);
return NS_OK;
}
NS_IMETHODIMP
JetpackParent::UnregisterReceivers(const nsAString& aMessageName)
{
JetpackActorCommon::UnregisterReceivers(nsString(aMessageName));
return NS_OK;
}
NS_IMETHODIMP
JetpackParent::EvalScript(const nsAString& aScript)
{
if (!SendEvalScript(nsString(aScript)))
return NS_ERROR_FAILURE;
return NS_OK;
}
class AutoCXPusher
{
public:
AutoCXPusher(JSContext* cx)
: mCXStack(do_GetService("@mozilla.org/js/xpc/ContextStack;1"))
{
NS_ASSERTION(mCXStack, "No JS context stack?");
if (mCXStack)
mCXStack->Push(cx);
}
~AutoCXPusher()
{
if (mCXStack)
mCXStack->Pop(NULL);
}
private:
nsCOMPtr<nsIJSContextStack> mCXStack;
};
// We have to delete the JetpackProcessParent on the I/O thread after event
// loop iteration in which JetpackParent::ActorDestroy runs is finished.
static void
DelayedDestroyProcess(JetpackProcessParent* o)
{
XRE_GetIOMessageLoop()
->PostTask(FROM_HERE, new DeleteTask<JetpackProcessParent>(o));
}
void
JetpackParent::ActorDestroy(ActorDestroyReason why)
{
switch (why) {
case AbnormalShutdown: {
nsAutoString dumpID;
#ifdef MOZ_CRASHREPORTER
nsCOMPtr<nsILocalFile> crashDump;
TakeMinidump(getter_AddRefs(crashDump)) &&
CrashReporter::GetIDFromMinidump(crashDump, dumpID);
#endif
MessageLoop::current()->
PostTask(FROM_HERE,
mTaskFactory.NewRunnableMethod(
&JetpackParent::DispatchFailureMessage,
dumpID));
break;
}
case NormalShutdown:
break;
default:
NS_ERROR("Unexpected actordestroy reason for toplevel actor.");
}
MessageLoop::current()->
PostTask(FROM_HERE, NewRunnableFunction(DelayedDestroyProcess, mSubprocess));
mSubprocess = NULL;
}
bool
JetpackParent::RecvSendMessage(const nsString& messageName,
const InfallibleTArray<Variant>& data)
{
AutoCXPusher cxp(mContext);
JSAutoRequest request(mContext);
JSAutoEnterCompartment ac;
if (!ac.enter(mContext, JS_GetGlobalObject(mContext)))
return false;
return JetpackActorCommon::RecvMessage(mContext, messageName, data, NULL);
}
bool
JetpackParent::AnswerCallMessage(const nsString& messageName,
const InfallibleTArray<Variant>& data,
InfallibleTArray<Variant>* results)
{
AutoCXPusher cxp(mContext);
JSAutoRequest request(mContext);
JSAutoEnterCompartment ac;
if (!ac.enter(mContext, JS_GetGlobalObject(mContext)))
return false;
return JetpackActorCommon::RecvMessage(mContext, messageName, data, results);
}
NS_IMETHODIMP
JetpackParent::CreateHandle(nsIVariant** aResult)
{
HandleParent* handle =
static_cast<HandleParent*>(SendPHandleConstructor());
NS_ENSURE_TRUE(handle, NS_ERROR_OUT_OF_MEMORY);
nsresult rv;
nsCOMPtr<nsIXPConnect> xpc(do_GetService(nsIXPConnect::GetCID(), &rv));
NS_ENSURE_SUCCESS(rv, rv);
JSAutoRequest request(mContext);
JSAutoEnterCompartment ac;
if (!ac.enter(mContext, JS_GetGlobalObject(mContext)))
return false;
JSObject* hobj = handle->ToJSObject(mContext);
if (!hobj)
return NS_ERROR_FAILURE;
return xpc->JSToVariant(mContext, OBJECT_TO_JSVAL(hobj), aResult);
}
NS_IMETHODIMP
JetpackParent::Destroy()
{
if (mSubprocess)
Close();
NS_ASSERTION(!mSubprocess, "ActorDestroy should have been called.");
ClearReceivers();
return NS_OK;
}
PHandleParent*
JetpackParent::AllocPHandle()
{
return new HandleParent();
}
bool
JetpackParent::DeallocPHandle(PHandleParent* actor)
{
delete actor;
return true;
}
void
JetpackParent::OnChannelConnected(int32 pid)
{
ProcessHandle handle;
if (!base::OpenPrivilegedProcessHandle(pid, &handle))
NS_RUNTIMEABORT("can't open handle to child process");
SetOtherProcess(handle);
}
void
JetpackParent::DispatchFailureMessage(const nsString& aDumpID)
{
#ifdef MOZ_CRASHREPORTER
CrashReporter::AnnotationTable notes;
notes.Init();
notes.Put(NS_LITERAL_CSTRING("ProcessType"), NS_LITERAL_CSTRING("jetpack"));
// TODO: Additional per-process annotations.
CrashReporter::AppendExtraData(aDumpID, notes);
#endif
InfallibleTArray<KeyValue> keyvalues;
if (!aDumpID.IsEmpty()) {
KeyValue kv(NS_LITERAL_STRING("dumpID"), PrimVariant(aDumpID));
keyvalues.AppendElement(kv);
}
CompVariant object(keyvalues);
InfallibleTArray<Variant> arguments;
arguments.AppendElement(object);
RecvSendMessage(NS_LITERAL_STRING("core:process-error"), arguments);
}
} // namespace jetpack
} // namespace mozilla