gecko-dev/dom/file
Andrew McCreight c706a636a8 Bug 1559489, part 4 - Remote-to-local window transplanting. r=tcampbell,bzbarsky
This patch cleans up remote outer window proxies when we navigate back
into the process.

It adds a flag to mDanglingRemoteOuterProxies that is set in between
BrowsingContext::SetDocShell(), where we can tell that the browsing
context is going from being remote to being local, to
nsGlobalWindowOuter::SetNewDocument(), where the local outer window
proxy is actually created. Once the outer window is created, the
remote window proxies can be cleaned up in
CleanUpDanglingRemoteOuterWindowProxies().

The clean up is done by a process that is similar to object
transplanting, except that instead of looking in the cross-compartment
wrapper table for each compartment to find objects to be turned into
CCWs to the new object, it looks in the remote proxy map for each
compartment. SpiderMonkey doesn't know about the proxy maps, so this
has to be done by a new callback object CompartmentTransplantCallback.

Now that this cleanup is being done, it shouldn't be possible to wrap
a remote outer window proxy when the browsing context is local, so
MaybeWrapWindowProxy() can be simplified. I had to drop the assert
here that the browsing context has a window proxy because during clean
up we call wrap on a local outer window proxy before the BC gets the
window proxy set on it. I had the assert because my original plan was
to implicitly fix remote proxies during wrapping, but that is no
longer necessary.

Differential Revision: https://phabricator.services.mozilla.com/D38343

--HG--
extra : moz-landing-system : lando
2019-08-13 19:09:59 +00:00
..
ipc
tests Bug 1559489, part 4 - Remote-to-local window transplanting. r=tcampbell,bzbarsky 2019-08-13 19:09:59 +00:00
uri
BaseBlobImpl.cpp
BaseBlobImpl.h
Blob.cpp
Blob.h
BlobImpl.cpp
BlobImpl.h
BlobSet.cpp
BlobSet.h
EmptyBlobImpl.cpp
EmptyBlobImpl.h
File.cpp
File.h
FileBlobImpl.cpp
FileBlobImpl.h
FileCreatorHelper.cpp
FileCreatorHelper.h
FileList.cpp
FileList.h
FileReader.cpp
FileReader.h
FileReaderSync.cpp
FileReaderSync.h
MemoryBlobImpl.cpp
MemoryBlobImpl.h
moz.build
MultipartBlobImpl.cpp
MultipartBlobImpl.h
MutableBlobStorage.cpp
MutableBlobStorage.h
MutableBlobStreamListener.cpp
MutableBlobStreamListener.h
StreamBlobImpl.cpp
StreamBlobImpl.h
StringBlobImpl.cpp
StringBlobImpl.h
TemporaryFileBlobImpl.cpp
TemporaryFileBlobImpl.h