Reviewable per commits:
As noted in
https://github.com/servo/servo/pull/42180#discussion_r2749861902
transmuting `&Reflector<AssociatedMemory>` to `&Reflector<()>` will
ignore AssociatedMemory information and thus it will not remove extra
associated memory. By returning `&Reflector<Self::ReflectorType>` from
`DomObject::reflector()` we will preserve this information and thus
correctly handle cases with associated memory. We also do not need
`overrideMemoryUsage` in bindings.conf anymore. 🎉
Instead of removing associated memory in drop code we should do it as
part of finalizers, otherwise we have problems in nested (inherited)
structs, where drop is run for both parent and child, but we only added
associated memory for child (on init_reflector) which already included
size of parent. The only exception here is promise, because it is RCed
and not finalized.
Testing: Tested locally that it fixes speedometer.
Fixes#42269
---------
Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>
By reporting memory usage of rust objects back to SM it can trigger GC
sooner and release more memory (I hope that we could use this to avoid
OOB in webgpu in the future).
Currently we use simple `size_of::<DomStruct>() +
size_of::<Box<DomStruct>>()` but it's possible to override reported
memory with `update_memory_size(self, nbytes);` on reflector. This is
mostly useful for canvases and buffers which usually have large
associated data.
Testing: None, but I am wondering if we can connect this to
`about:memory`.
Fixes: #42168
---------
Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>
This implements the solution from #26488 that prevents implementing Drop
manually for DOM interfaces, which is very easy to write in a way that
can cause memory safety errors during JS runtime teardown. Since we have
a bunch of pre-existing implementations that we are working on removing,
this PR adds an opt-out mechanism that those interfaces use.
Testing: Compile-time code generation; not possible to test.
Fixes: part of #26488
Signed-off-by: Josh Matthews <josh@joshmatthews.net>
Companion to https://github.com/servo/mozjs/pull/650
We added 3 new options to bindings.conf, each more powerful then the
previous one, so one should use the least powerful as possible to keep
things flexible:
1 `cx_no_gc` prepends argument `&JSContext`, which allows creating NoGC
tokens and using functions that do not trigger GC.
2. `cx` prepends argument `&mut JSContext`, which allows everything that
previous one allows, but it also allows calling GC triggering functions.
3. `realm` prepends argument `&mut CurrentRealm`, which can be deref_mut
to `&mut JSContext` (so it can do everything that previous can), but it
also ensures that there is current entered realm, which can be used for
creation of InRealm.
next steps: #40600
reviewable per commit
Testing: It's just refactoring
try run: https://github.com/sagudev/servo/actions/runs/19287700927
---------
Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>
This will complete the type annotation on `codegen.py` so we can safely
remove the ignore from `pyproject` configurataion
---------
Signed-off-by: Jerens Lensun <jerensslensun@gmail.com>
Signed-off-by: Mukilan Thiyagarajan <mukilan@igalia.com>
Co-authored-by: Mukilan Thiyagarajan <mukilan@igalia.com>
Add type around CG class for code generatio Web IDL in codegen.py
Testing: *Describe how this pull request is tested or why it doesn't
require tests*
Fixes: *Link to an issue this pull requests fixes or remove this line if
there is no issue*
---------
Signed-off-by: Jerens Lensun <jerensslensun@gmail.com>
Signed-off-by: Mukilan Thiyagarajan <mukilan@igalia.com>
Co-authored-by: Mukilan Thiyagarajan <mukilan@igalia.com>
This is part of introducing the Ruff rule [flake8-annotations
(ANN)](https://docs.astral.sh/ruff/rules/#flake8-annotations-ann) into
the script_bindings folder.
Since `codegen.py` has 10k lines of code, the strategy is to introduce
the rule first while ignoring the `ANN` Ruff rule for `codegen.py`. We
will then gradually add type annotations slice by slice to ensure no new
errors occur outside of `ANN`.
Testing: `./mach test-wpt webidl`
---------
Signed-off-by: Jerens Lensun <jerensslensun@gmail.com>
*Describe the changes that this pull request makes here. This will be
the commit message.*
Testing: *Describe how this pull request is tested or why it doesn't
require tests*
Fixes: *Link to an issue this pull requests fixes or remove this line if
there is no issue*
---------
Signed-off-by: Jerens Lensun <jerensslensun@gmail.com>
Introduce type checking with Pyrefly in `components/script_bindings`
This commit adds Pyrefly-based type checking to the
`components/script_bindings` directory. The primary goal is to catch
type inconsistencies early and reduce the likelihood of unexpected
runtime errors.
This change affects the `webidl` component, as these script bindings are
responsible for connecting WebIDL specifications to the Rust codebase.
Testing: `./mach test-wpt webidl`
Fixes: *Link to an issue this pull requests fixes or remove this line if
there is no issue*
---------
Signed-off-by: Jerens Lensun <jerensslensun@gmail.com>
to use the [SpiderMonkey Debugger
API](https://firefox-source-docs.mozilla.org/js/Debugger/), we need to
call it from an internal debugger script that we will supply. this
script must run in the same runtime as the debuggee(s), but in a
separate
[compartment](https://udn.realityripple.com/docs/Mozilla/Projects/SpiderMonkey/Compartments)
([more
details](https://hacks.mozilla.org/2020/03/future-proofing-firefoxs-javascript-debugger-implementation/)).
when creating two globals in the same runtime, Servo will generally try
to reuse an existing compartment for the second global, and there are
other places in script where we rely on this reuse. but for the debugger
script, we can’t do this.
this patch adds a `use_system_compartment` flag to global object
descriptors, which isolates the global in its own compartment in both
possible directions:
- it forces the global to create a new compartment, preventing the reuse
of any debuggee’s compartment
- it fails the check in select_compartment(), preventing future
debuggees from reusing the global’s compartment
Testing: manually tested working in devtools debugger patch (#37667),
where it will undergo automated tests
---------
Signed-off-by: Delan Azabani <dazabani@igalia.com>
Co-authored-by: atbrakhi <atbrakhi@igalia.com>
Renames the files to pythonic file names. Also replaces the bespoke
caching function with the functools caching function which is
functionally equivalent.
---------
Signed-off-by: Ashwin Naren <arihant2math@gmail.com>
