IPCBlobInputStream is a new type of nsIInputStream that is used only in content
process when a Blob is sent from parent to child. This inputStream is for now,
just cloneable.
When the parent process sends a Blob to a content process, it has the Blob and
its inputStream. With its inputStream it creates a IPCBlobInputStreamParent
actor. This actor keeps the inputStream alive for following uses (not part of
this patch).
On the child side we will have, of course, a IPCBlobInputStreamChild actor.
This actor is able to create a IPCBlobInputStream when CreateStream() is
called. This means that 1 IPCBlobInputStreamChild can manage multiple
IPCBlobInputStreams each time one of them is cloned. When the last one of this
stream is released, the child actor sends a __delete__ request to the parent
side; the parent will be deleted, and the original inputStream, on the parent
side, will be released as well.
IPCBlobInputStream is a special inputStream because each method, except for
Available() fails. Basically, this inputStream cannot be used on the content
process for nothing else than knowing the size of the original stream.
In the following patches, I'll introduce an async way to use it.
This patch does a few things:
a) Adds the resources location from the .app directory to the read whitelist
b) When it's a non-packaged build, mach run (and various mach tests) set an environment variable for the repo location which we allow reads from.
r=haik,froydnj
MozReview-Commit-ID: KNvAoUs5Ati
The goal of this patch is to remove the call to the sync IPC
GetCompositorOptions message from TabChild::InitRenderingState. In order
to this, we have InitRenderingState take the CompositorOptions as an
argument instead, and propagate that backwards through the call sites.
Eventually we can propagate it back to a set of already-sync IPC
messages in PCompositorBridge that are used during layers id
registration (NotifyChildCreated, NotifyChildRecreated, etc.). Therefore
this patch effectively piggybacks the CompositorOptions sync IPC onto
these pre-existing sync IPC messages.
The one exception is when we propagate it back to the AdoptChild call.
If this message were sync we could just use it like the others and have
it return a CompositorOptions. However, it is async, so instead we add
another call to GetCompositorOptions here temporarily. This will be
removed in the next patch.
MozReview-Commit-ID: AtdYOuXmHu4
We add a new "on-off" protocol PURLClassifierLocal which calls
nsIURIClassifier.asyncClassifyLocalWithTables on construction and
calls back on destruction. Pretty much the same design as PURLClassifier.
In order to avoid code duplication, the actor implementation is templatized
and |MaybeInfo| in PURLClassifier.ipdl is moved around.
Test case is included and the custom event target is not in place for labelling.
The custom event target will be done in Bug 1353701.
MozReview-Commit-ID: IdHYgdnBV7S
MozReview-Commit-ID: GTQF3x1pBtX
A general outline of the COM handler (a.k.a. the "smart proxy"):
COM handlers are pieces of code that are loaded by the COM runtime along with
a proxy and are layered above that proxy. This enables the COM handler to
interpose itself between the caller and the proxy, thus providing the
opportunity for the handler to manipulate an interface's method calls before
those calls reach the proxy.
Handlers are regular COM components that live in DLLs and are declared in the
Windows registry. In order to allow for the specifying of a handler (and an
optional payload to be sent with the proxy), the mscom library allows its
clients to specify an implementation of the IHandlerProvider interface.
IHandlerProvider consists of 5 functions:
* GetHandler returns the CLSID of the component that should be loaded into
the COM client's process. If GetHandler returns a failure code, then no
handler is loaded.
* GetHandlerPayloadSize and WriteHandlerPayload are for obtaining the payload
data. These calls are made on a background thread but need to do their work
on the main thread. We declare the payload struct in IDL. MIDL generates two
functions, IA2Payload_Encode and IA2Payload_Decode, which are used by
mscom::StructToStream to read and write that struct to and from buffers.
* The a11y payload struct also includes an interface, IGeckoBackChannel, that
allows the handler to communicate directly with Gecko. IGeckoBackChannel
currently provides two methods: one to allow the handler to request fresh
cache information, and the other to provide Gecko with its IHandlerControl
interface.
* MarshalAs accepts an IID that specifies the interface that is about to be
proxied. We may want to send a more sophisticated proxy than the one that
is requested. The desired IID is returned by this function. In the case of
a11y interfaces, we should always return IAccessible2_3 if we are asked for
one of its parent interfaces. This allows us to eliminate round trips to
resolve more sophisticated interfaces later on.
* NewInstance, which is needed to ensure that all descendent proxies are also
imbued with the same handler code.
The main focus of this patch is as follows:
1. Provide an implementation of the IHandlerProvider interface;
2. Populate the handler payload (ie, the cache) with data;
3. Modify CreateHolderFromAccessible to specify the HandlerPayload object;
4. Receive the IHandlerControl interface from the handler DLL and move it
into the chrome process.
Some more information about IHandlerControl:
There is one IHandlerControl per handler DLL instance. It is the interface that
we call in Gecko when we need to dispatch an event to the handler. In order to
ensure that events are dispatched in the correct order, we need to dispatch
those events from the chrome main thread so that they occur in sequential order
with calls to NotifyWinEvent.
This is the most important part of the patch series. It removes the
PScreenManager protocol and use ScreenManager directly in the content
processes.
Initial and subsequent updates are sent via PContent::RefreshScreens.
struct ScreenDetails are kept to serialize Screen over IPC.
nsIScreenManager::ScreenForNativeWidget is removed because
nsIWidget::GetWidgetScreen can replace it. nsIScreen::GetId is removed
because it's not useful for the more general Screen class.
MozReview-Commit-ID: 5dJO3isgBuQ
These APIs are intended to use the mechanism defined in Part 1.
Part 3 implements the usage of these APIs to synchronize permissions.
MozReview-Commit-ID: HNKyDPtoaHl
CLOSED TREE
Backed out changeset d24fa1b4553b (bug 1346987)
Backed out changeset 34701b9ed4ba (bug 1346987)
Backed out changeset f24f4fdc5cc8 (bug 1346987)
These APIs are intended to use the mechanism defined in Part 1.
Part 3 implements the usage of these APIs to synchronize permissions.
MozReview-Commit-ID: HNKyDPtoaHl
If Firefox is updated while it is running, the content process can end
up being a different version than the parent process. This can cause
odd crashes, that will happen repeatedly until the user restarts
Firefox. To handle this better, this patch adds a special build ID
message that is sent early in content process startup. The parent
process intentionally crashes if the build ID for the child process
does not match that of the parent process.
MozReview-Commit-ID: 7D3ggkaLxNS
Instead of initializing DataStorage objects on demand in the content
process, we initialize them at content process startup by getting the
parent to send down the information about the existing DataStorages at
child process startup. After that point, the dynamic change
notifications added in bug 1215723 will take care of keeping the
information in sync.
