Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 204 insertions, 0 deletions

diff --git a/tools/sanitizer/docs/asan_nightly.rst b/tools/sanitizer/docs/asan_nightly.rst
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+ASan Nightly
+============
+
+The **ASan Nightly Project** involves building a Firefox Nightly browser
+with the popular
+`AddressSanitizer <https://github.com/google/sanitizers/wiki/AddressSanitizer>`__
+tool and enhancing it with remote crash reporting capabilities for any
+errors detected.
+
+The purpose of the project is to find subtle memory corruptions
+occurring during regular browsing that would either not crash at all or
+crash in a way that we cannot figure out what the exact problem is just
+from the crash dump. We have a lot of inactionable crash reports and
+AddressSanitizer traces are usually a lot more actionable on their own
+(especially use-after-free traces). Part of this project is to figure
+out if and how many actionable crash reports ASan can give us just by
+surfing around. The success of the project of course also depends on the
+number of participants.
+
+You can download the latest build using one of the links below. The
+builds are self-updating daily like regular nightly builds (like with
+regular builds, you can go to *"Help"* → *"About Nightly"* to force an
+update check or confirm that you run the latest version).
+
+.. note::
+
+   If you came here looking for regular ASan builds (e.g. for fuzzing or
+   as a developer to reproduce a crash), you should probably go to the
+   :ref:`Address Sanitizer` doc instead.
+
+.. _Requirements:
+
+Requirements
+~~~~~~~~~~~~
+
+Current requirements are:
+
+-  Windows or Linux-based Operating System
+-  16 GB of RAM recommended
+-  Special ASan Nightly Firefox Build
+
+   -  `Linux
+      Download <https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.v2.mozilla-central.shippable.latest.firefox.linux64-asan-reporter-opt/artifacts/public/build/target.tar.bz2>`__
+   -  `Windows
+      Download <https://firefox-ci-tc.services.mozilla.com/api/index/v1/task/gecko.v2.mozilla-central.shippable.latest.firefox.win64-asan-reporter-shippable-repackage-signing/artifacts/public/build/target.installer.exe>`__
+
+If you are already using regular Nightly, it should be safe to share the
+profile with the regular Nightly instance. If you normally use a beta or
+release build (and you would like to be able to switch back to these),
+you should consider using a second profile.
+
+.. warning::
+
+   **Windows Users:** Please note that the Windows builds currently show
+   an error during setup (see "*Known Issues*" section below), but
+   installation works nonetheless. We are working on the problem.
+
+.. note::
+
+   If you run in an environment with any sorts of additional security
+   restrictions (e.g. custom process sandboxing), please make sure that
+   your /tmp directory is writable and the shipped ``llvm-symbolizer``
+   binary is executable from within the Firefox process.
+
+Preferences
+~~~~~~~~~~~
+
+If you wish for your crash report to be identifiable, you can go to
+``about:config`` and set the **``asanreporter.clientid``** to your
+**valid email address**. This isn't mandatory, you can of course report
+crash traces anonymously. If you decide to send reports with your email
+address and you have a Bugzilla account, consider using the same email
+as your Bugzilla account uses. We will then Cc you on any bugs filed
+from your crash reports. If your email does not belong to a Bugzilla
+account, then we will not publish it but only use it to resolve
+questions about your crash reports.
+
+.. note::
+
+   Setting this preference helps us to get back to you in case we have
+   questions about your setup/OS. Please consider using it so we can get
+   back to you if necessary.
+
+Bug Bounty Program
+~~~~~~~~~~~~~~~~~~
+
+As a special reward for participating in the program, we decided to
+treat all submitted reports as if they were filed directly in Bugzilla.
+This means that reports that
+
+-  indicate a security issue of critical or high rating
+-  **and** that can be fixed by our developers
+
+are eligible for a bug bounty according to our `client bug bounty
+program
+rules <https://www.mozilla.org/security/client-bug-bounty/>`__. As
+the report will usually not include any steps to reproduce or a test
+case, it will most likely receive a lower-end bounty. Like with regular
+bug reports, we would typically reward the first (identifable) report of
+an issue.
+
+.. warning::
+
+   If you would like to participate in the bounty program, make sure you
+   set your **``asanreporter.clientid``** preference as specified above.
+   We cannot reward any reports that are submitted with no email
+   address.
+
+
+Known Issues
+~~~~~~~~~~~~
+
+This section lists all currently known limitations of the ASan Nightly
+builds that are considered bugs.
+
+-  [STRIKEOUT:Flash is currently not working]
+-  `Bug
+   1477490 <https://bugzilla.mozilla.org/show_bug.cgi?id=1477490>`__\ [STRIKEOUT:-
+   Windows: Stack instrumentation disabled due to false positives]
+-  `Bug
+   1478096 <https://bugzilla.mozilla.org/show_bug.cgi?id=1478096>`__ -
+   **Windows:** Error during install with maintenanceservice_tmp.exe
+-  It has been reported that ASan Nightly performance is particularly
+   bad if you run on a screen with 120hz refresh rate. Switching to 60hz
+   should improve performance drastically.
+
+Note that these bugs are **specific** to ASan Nightly as listed in the
+`tracking bug dependency
+list <https://bugzilla.mozilla.org/showdependencytree.cgi?id=1386297&hide_resolved=0>`__.
+For the full list of bugs found by this project, see `this
+list <https://bugzilla.mozilla.org/showdependencytree.cgi?id=1479399&hide_resolved=0>`__
+instead and note that some bugs might not be shown because they are
+security bugs.
+
+If you encounter a bug not listed here, please file a bug at
+`bugzilla.mozilla.org <https://bugzilla.mozilla.org/>`__ or send an
+email to
+`choller@mozilla.com <mailto:choller@mozilla.com?subject=%5BASan%20Nightly%20Project%5D%5BBug%20Report%5D>`__.
+When filing a bug, it greatly helps if you Cc that email address and
+make the bug block `bug
+1386297 <https://bugzilla.mozilla.org/show_bug.cgi?id=1386297>`__.
+
+FAQ
+~~~
+
+What additional data is collected?
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The project only collects ASan traces and (if you set it in the
+preferences) your email address. We don't collect any other browser
+data, in particular not the sites you were visiting or page contents. It
+is really just crash traces submitted to a remote location.
+
+.. note::
+
+   The ASan Nightly browser also still has all the data collection
+   capabilities of a regular Nightly browser. The answer above only
+   refers to what this project collects **in addition** to what the
+   regular Nightly browser can collect.
+
+What's the performance impact?
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The ASan Nightly build only comes with a slight slowdown at startup and
+browsing, sometimes it is not even noticeable. The RAM consumption
+however is much higher than with a regular build. Be prepared to restart
+your browser sometimes, especially if you use a lot of tabs at once.
+Also, the updates are larger than the regular ones, so download times
+for updates will be higher, especially if you have a slower internet
+connection.
+
+.. warning::
+
+   If you experience performance issues, see also the *"Known Issues"*
+   section above, in particular the problem about screen refresh rate
+   slowing down Firefox.
+
+What about stability?
+^^^^^^^^^^^^^^^^^^^^^
+
+The browser is as stable as a regular Nightly build. Various people have
+been surfing around with it for their daily work for weeks now and we
+have barely received any crash reports.
+
+How do I confirm that I'm running the correct build?
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+If you open ``about:config`` and type *"asanreporter"* into the search
+field, you should see an entry called ``asanreporter.apiurl`` associated
+with a URL. Do not modify this value.
+
+.. warning::
+
+   Since Firefox 64, the *"ASan Crash Reporter"*  feature is no longer
+   listed in ``about:support``
+
+Will there be support for Mac?
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+We are working on support for Mac, but it might take longer because we
+have no ASan CI coverage on Mac due to hardware constraints. If you work
+on Release Engineering and would like to help make e.g. Mac happen
+earlier, feel free to `contact
+me <mailto:choller@mozilla.com?subject=%5BASan%20Nightly%20Project%5D%20>`__.