IndexedDB database operations are written such that they must execute
synchronously. For this reason, the add/put operation reads/writes its
Blobs to disk in a synchronous fashion. However, with the introduction
of SendStream-backed Blobs for large (>1 MiB) blobs whose contents are
streamed to the parent replacing nsStringInputStream-backed Blobs
(whose contents were sent up in a single IPC message that might exceed
the size limit and cause a crash), this has no longer been a safe
assumption. However, the problems weren't immediately obvious because
most pre-WASM Blobs are smaller than the 1MiB threshold and even when
they exceeded the size, their memory-backed contents could rapidly be
sent to the parent via IPC, making NS_BASE_STREAM_WOULD_BLOCK errors
rare/hard to reproduce. (rr and its enforced single-threading is a
good way to reproduce, however. Also, see the testing patch on the
bug that introduces artificial delays into SendStream.)
Included SpecialPowersObserver.jsm minor changes to "CreateFiles":
- appendRelativePath is used instead of appendPath because appendPath
only allows a single path component to be appended. In other words,
file creation is limited to files at the root of the profile
directory using appendPath, which is needlessly limiting.
- outStream is now closed even if no data is provided. This is
essential on windows where file deletion only occurs when all handles
are closed. Without this fix, "RemoveFiles" side-effect of deleting
the created files might not take effect until garbage collection runs
and collects the outStream.
Now that Marionette can load about:blank multiple times right after each
other there is no need to prevent using it when turning of the new tab page.
test_about_blank_for_new_docshell can also be updated by using a new tab for
the test. This also gives us a new docshell and can also be run for Fennec.
MozReview-Commit-ID: GWxtsH3nQt
--HG--
extra : rebase_source : 0545382008e874cfeee90fc26ca42ed94ef05b0d
This refactors some of the error logic into a new IniParseError exception. In addition to checking for a 'name' property, we also
check for a 'path' property. This is because some file-like objects coming out of the build system use a 'path' attribute instead
of the standard 'name'.
MozReview-Commit-ID: EXXl9gt1MQk
--HG--
extra : rebase_source : a130824e6724fdef5cf0bd627b19db68ec5fe683
IndexedDB database operations are written such that they must execute
synchronously. For this reason, the add/put operation reads/writes its
Blobs to disk in a synchronous fashion. However, with the introduction
of SendStream-backed Blobs for large (>1 MiB) blobs whose contents are
streamed to the parent replacing nsStringInputStream-backed Blobs
(whose contents were sent up in a single IPC message that might exceed
the size limit and cause a crash), this has no longer been a safe
assumption. However, the problems weren't immediately obvious because
most pre-WASM Blobs are smaller than the 1MiB threshold and even when
they exceeded the size, their memory-backed contents could rapidly be
sent to the parent via IPC, making NS_BASE_STREAM_WOULD_BLOCK errors
rare/hard to reproduce. (rr and its enforced single-threading is a
good way to reproduce, however. Also, see the testing patch on the
bug that introduces artificial delays into SendStream.)
Included SpecialPowersObserver.jsm minor changes to "CreateFiles":
- appendRelativePath is used instead of appendPath because appendPath
only allows a single path component to be appended. In other words,
file creation is limited to files at the root of the profile
directory using appendPath, which is needlessly limiting.
- outStream is now closed even if no data is provided. This is
essential on windows where file deletion only occurs when all handles
are closed. Without this fix, "RemoveFiles" side-effect of deleting
the created files might not take effect until garbage collection runs
and collects the outStream.
Carsten "Tomcat" Book
Andrea Marchesini
Bob Clary
Wes Kocher
Andreas Farre
Florian Quèze
Andrew Sutherland
Joel Maher
Phil Ringnalda
Mark Banner
Chris Manchester
Sebastian Hengst
Henrik Skupin
Andrew Halberstadt
Nicholas Nethercote
Olli Pettay
William Lachance
Boris Zbarsky
Justin Wood