layout_2020: Check blocks for whether they will establish a formatting context
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According to spec
https://drafts.csswg.org/css-overflow-3/#overflow-control, If the computed value of overflow on a block box is neither visible nor clip nor a combination thereof, it establishes an independent formatting context for its contents.
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De-dupe sha-1
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Stop skipping css-logical tests in layout-2020
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Remove more Python 2 compatibility code
- os.environ is always `str` in Python 3.
- The only string type is `str` so we can stop using `six.str_types`.
- `iteritems()` isn't necessary because dicts have the `items()` method.
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- os.environ is always `str` in Python 3.
- The only string type is `str` so we can stop using `six.str_types`.
- `iteritems()` isn't necessary because dicts have the `items()` method.
Propagate status on `build_like_command_arguments`
As observed in #29805
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- [x] These changes fix#29806
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Do not pass features when running `./mach test-unit`
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Only check the GStreamer installation when building
Instead of always checking whether GStreamer is installed in mach's `build_env`, only do this when actually building. Also, use the instance variable to find features and look for the "media-gstreamer" feature instead of looking for !"media-dummy."
Fixes#29797.
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Instead of always checking whether GStreamer is installed in mach's
`build_env`, only do this when actually building. Also, use the instance
variable to find features and look for the "media-gstreamer" feature
instead of looking for !"media-dummy."
Fixes#29797.
Fix layout 2020 crashes
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This PR contains (temporary) fixes for two issues discovered in layout-2020.
1. servo crashing due to 'already mutably borrowed' error when loading 'https://mozdevs.github.io/servo-experiments/experiments/bookshelf/'
2. Dev builds crashing when loading servo.org, but not in release mode.
For the first issue, when rendering a page containing an iframe, layout 2020 creates parallel 'Layout' threads which share workers in the stylo thread pool. Because of the way the 'StyleSharingCache' structures are designed using TLS for storage of LRU cache, this leads to a double borrow of the cache when both layout threads run concurrently.
More details about the issue can be found here: https://gist.github.com/mukilan/ed57eb61b83237a05fbf6360ec5e33b0
This PR is a workaround until we find a more elegant/optimal design that also can work for gecko. The fix for now is simply to not allow multiple layouts in parallel.
For the second issue, it seems like the style pool threads overrun their allocated stack space more quickly in debug mode than in release mode. Based on https://bugzilla.mozilla.org/show_bug.cgi?id=1376883 it seems the stack size was chosen after several experiments. It is possible the results of those experiments are no longer valid.
The temporary workaround is to increase the stack size of the worker threads to avoid layout 2020 builds from crashing when servo.org is loaded, until we can confirm the theory and implement a more robust solution.
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servo with layout-2020 segfaults when loading servo.org
in debug build, but works fine in release build.
It seems like the style pool threads seem to run
overrun allocated stack space more quickly than
in release mode.
Based on https://bugzilla.mozilla.org/show_bug.cgi?id=1376883
it seems the stack size was chosen base on several
experiments. It is possible the results of those experiments
are no longer valid.
This is a temporary workaround to avoid layout 2020
builds from crashing when servo.org is loaded, until
we can confirm the theory and implement a more robust
solution.
Signed-off-by: Mukilan Thiyagarajan <me@mukilan.in>
When rendering a page containing an iframe, layout 2020
creates parallel 'Layout' threads which share workers
in the stylo thread pool.
Because of the way the 'StyleSharingCache' is designed
using TLS for storage of the LRU cache, this leads to
a double borrow of the cache when both layout threads
run concurrently.
More details about the issue can be found here:
https://gist.github.com/mukilan/ed57eb61b83237a05fbf6360ec5e33b0
This PR is a workaround until we find a more elegant/optimal
design that also can work for gecko. The fix for now is
simply to not allow multiple layouts in parallel.
Signed-off-by: Mukilan Thiyagarajan <me@mukilan.in>
Clean up cross-compilation and features
Integrate cross-compilation and media-stack handling into the
`build_like_command_arguments` decorator. This removes a lot of
repetition in the code and standardizes how targets are selected for all
similar commands.
Now cross compilation targets, feature flags, and helper variables are
stored in the CommandBase instance. This also avoids having to
continuously pass these arguments down to functions called by the
commands.
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Backport several style changes from Gecko (2)
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This continues #29748.
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Clean up and document the `send_display_list` interface
This moves more members to the CompositorDisplayListInfo struct, which now holds all miscellaneous, non-WebRender data when sending display lists. It also documents what each things sent with a display list does.
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Integrate cross-compilation and media-stack handling into the
`build_like_command_arguments` decorator. This removes a lot of
repetition in the code and standardizes how targets are selected for all
similar commands.
Now cross compilation targets, feature flags, and helper variables are
stored in the CommandBase instance. This also avoids having to
continuously pass these arguments down to functions called by the
commands.
Implement `bootstrap-gstreamer` for all platforms
This change makes it so that the Platform classes can now handle installing GStreamer dependencies and properly setting up the environment including when cross-compiling. For Windows and Linux, prepackaged GStreamer is now installed into `target/dependencies/gstreamer` when not installed system-wide. In addition this change:
1. The Environment path append helper is moved to `util.py` and a new `prepend` version is added.
2. `set_run_env` and `build_dev` functions are combined and include more code from callers so environment setup is more often in the same place. Now code that used to call `set_run_env` calls `build_dev` and then `os.environ.update(...)`. We can further refine this with the `is_build` argument later.
4. Python typing information is added in many places.
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Upload nightly builds for layout2020 variant
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We'd like to start offering servo nightly builds with layout 2020 engine so that users can test the new layout without building servo. These new builds will be offered in addition to the current 2013 builds until we switch over to 2020 as the default.
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This change makes it so that the Platform classes can now handle
installing GStreamer dependencies and properly setting up the
environment including when cross-compiling. For Windows and Linux
is now installed into `target/dependencies/gstreamer` when not installed
system-wide. In addition:
1. Creating and moving existing environment path append helpers to
`util.py`.
2. Combining the `set_run_env` and `build_dev` functions and moving
some outside code into them so that it can be shared. Now code that
used to call `set_run_env` calls `build_dev` and then
`os.environ.update(...)`.
3. Adding Python typing information in many places.
Signed-off-by: Martin Robinson <mrobinson@igalia.com>
Remove outdated note on README (fix#29786)
This patch just removes a note about building only servo vs libsimpleservo binaries, as that's no longer working.
