The 'asyncStack' flag on JS execution contexts is used as a general switch
to enable async stack capture across all locations in SpiderMonkey, but
this causes problems because it can at times be too much of a performance
burden to general and track all of these stacks.
Since the introduction of this option, we have only enabled it on Nightly
and DevEdition for non-mobile builds, which has left a lot of users unable
to take advantage of this data while debugging.
This patch enables async stack traces across all of Firefox, but introduces
a new pref to toggle the scope of the actual expensive part of async stacks,
which is _capturing_ them and keeping them alive in memory. The new pref
limits the capturing of async stack traces to only debuggees, unless an
explicit pref is flipped to capture async traces for all cases.
This means that while async stacks are technically enabled, and code could
manually capture a stack and pass it back to SpiderMonkey and see that stack
reflected in later captured stacks, SpiderMonkey itself and related async
DOM APIs, among others, will not capture stacks or pass them to SpiderMonkey,
so there should be no general change in performance by enabling the broader
feature itself, unless the user is actively debugging the page.
One affect of this patch is that if you have the debugger open and then close
it, objects that have async stacks associated with them will retain those
stacks and they will continue to show up in stack traces, no _new_ stacks
will be captured. jorendorff and I have decided that this is okay because
the expectation that the debugger fully revert every possible effect that it
could have on a page is a nice goal but not a strict requirement.
Differential Revision: https://phabricator.services.mozilla.com/D68503
converts:
* security.sandbox.rdd.win32k-disable
* security.sandbox.gmp.win32k-disable
I'm assuming the pattern established by the other, newer, win32k StaticPrefs can
be followed here, and the xpcom checks aren't needed.
Differential Revision: https://phabricator.services.mozilla.com/D78933
The changes proposed here will speculatively parse all external scripts off thread as soon as they are fetched, except for async, link preload, and non parser inserted scripts. This should save us some time since currently all scripts are parsed right before execution or while they are blocking the dom parser.
Differential Revision: https://phabricator.services.mozilla.com/D76644
In general, PSM caches intermediates from verified certificate chains in the
NSS certdb. Before bug 1619021, this would include preloaded intermediates,
which is unnecessary because cert_storage has a copy of those certificates, and
so they don't need to take up time and space in the NSS certdb. This patch
introduces the intermediate preloading healer, which periodically runs on a
background thread, looks for these duplicate intermediates, and removes them
from the NSS certdb.
Differential Revision: https://phabricator.services.mozilla.com/D77152
NOTE: this also removes a mysterious old comment that implied this code could run without libpref initializing
the value, in which case they picked a different default. I assume this is no longer a real configuration?
Differential Revision: https://phabricator.services.mozilla.com/D77848
This renames the pref to remove 'experimental' and turns it on by default.
For integration with the CC, any DOM objects that are the target of a WeakRef or registered with a FinalizationRegistry have their wrappers preserved. WeakRef.deref() checks whether any wrapper is still preserved and returns undefined if not, to avoid giving out references to wrappers whose DOM object has been cycle collected.
Tests exercising browser integration are under js/xpconnect/tests/mochitest/.
Differential Revision: https://phabricator.services.mozilla.com/D77656
Mozilla consider that we should protect even Nightly testers from the behavior
change of bug 1320229.
And I forgot to modify the new mochitest for bug 1635224 which is a regression
of bug1320229.
Differential Revision: https://phabricator.services.mozilla.com/D78841
Fix of bug 1320229 allowed to paste longer text than `maxlength` attribute of
`<input>` and `<textarea>` because it was thought that the longer text causes
"too long" invalidate state, makes users notified and prevent to submit
form data.
However, according to Bug 1636855 comment 7 (*1), it breaks a major enterprise
web app, SAP, at least because it sends form data without checking validity of
each form data and discards invalid data on server side silently.
According to bug 1636855 comment 24 (*2), one of new behavior's fault is
on Gecko side too. The style of `<input>` element or `<textarea>` element
which has too long text after pasting is changed when it loses focus.
Therefore, users can post the data before they know pasted data is too
long if sending the form data with `Enter` key or something immediately
after pasting (i.e., without moving focus) web apps handle it by themselves.
On the other hand, the original bug report, bug 1320229, should be solved in
the future especially in password field because users may register password
which is cut by `maxlength` silently and they don't use builtin password
manager, only the pasted password is saved, and then, they won't be able to
login as the account. This is really long standing issue of the web forms.
An article (*3) warned this to web developers in 2011. Therefore, we should
keep going advance for solving this issue at least in Nightly channel to get
more feedback from testers and web developers.
1 https://bugzilla.mozilla.org/show_bug.cgi?id=1636855#c7
2 https://bugzilla.mozilla.org/show_bug.cgi?id=1636855#c24
3 https://www.christophermanning.org/writing/dont-use-maxlength-on-password-inputs
Differential Revision: https://phabricator.services.mozilla.com/D78613
Now that bug 1632357 is fixed there is no known regression from using those flags. So let's get wider exposure to them even though direct manipulation isn't yet enabled by default.
Differential Revision: https://phabricator.services.mozilla.com/D78474
In general, PSM caches intermediates from verified certificate chains in the
NSS certdb. Before bug 1619021, this would include preloaded intermediates,
which is unnecessary because cert_storage has a copy of those certificates, and
so they don't need to take up time and space in the NSS certdb. This patch
introduces the intermediate preloading healer, which periodically runs on a
background thread, looks for these duplicate intermediates, and removes them
from the NSS certdb.
Differential Revision: https://phabricator.services.mozilla.com/D77152
After investigating the potential to reduce the nsTerminator's crash timeout from
1 min, to 20s, and then finally 40s, we have decided to this does not provide
significant gains to justify increasing the amount of shutdown hang crashes
and potential to lose data. We should maintain the crash timeout at 1 min.
Differential Revision: https://phabricator.services.mozilla.com/D77939
Noemi Erli
Logan Smyth
Alexis Beingessner
Kartikaya Gupta
Kearwood Gilbert
Razvan Maries
Andrea Marchesini
Paul Bone
Dragana Damjanovic
Emilio Cobos Álvarez
neil
Narcis Beleuzu
Kagami Sascha Rosylight
Denis Palmeiro
Jan Andre Ikenmeyer
Dana Keeler
Dan Minor
Jon Coppeard
Masayuki Nakano
Tom Tung
Kashav Madan
Kris Taeleman
Masatoshi Kimura
Timothy Nikkel
Chris H-C
Gabriele Svelto
Martin Thomson
Emma Malysz
Farooq AR
Butkovits Atila
Mark Hammond