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In addition to invoking js_string() with existing UTF-16 strings when
possible, RegExpExec now takes a Utf16String instead of a Utf16View. The
view was previously fully copied into the returned result object, so
this prevents potentially large copies of string data.
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The primary themes here are invoking js_string() with existing instances
of Utf16String when possible, and not creating entire UTF-8 copies when
not needed.
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This commit does not go out of its way to reduce copying of the string
data yet, but is a minimum set of changes to compile LibJS after making
PrimitiveString hold a Utf16String.
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To help alleviate memory usage when creating and copying large strings,
create a simple wrapper around a Vector<u16> to reference count UTF-16
strings.
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TreeView now prints columns mostly like it used to. The paddings are now
properly applied, though. focus_rect drawing has been gated behind a
selection_behavior() check to make sure we don't draw a focus rect
around the column text when we're supposed to draw it over the entire
row.
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AbstractTableView (which TreeView inherits from) sets the selection
behavior of the view to SelectRows. This is not how TreeViews are used
in most of the system, and TreeView::paint_event actually always draws
with the assumption of selecting individual items. This commit defines
the expected selection behavior for TreeViews. Users of TreeView can
still override this via TreeView::set_selection_behavior.
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This allows tracing the syscalls made by a thread through the kernel's
performance event framework, which is similar in principle to strace.
Currently, this merely logs a stack backtrace to the current thread's
performance event buffer whenever a syscall is made, if profiling is
enabled. Future improvements could include tracing the arguments and
the return value, for example.
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This doesn't need to use our highest-precision timestamp.
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This patch adds a vDSO-like mechanism for exposing the current time as
an array of per-clock-source timestamps.
LibC's clock_gettime() calls sys$map_time_page() to map the kernel's
"time page" into the process address space (at a random address, ofc.)
This is only done on first call, and from then on the timestamps are
fetched from the time page.
This first patch only adds support for CLOCK_REALTIME, but eventually
we should be able to support all clock sources this way and get rid of
sys$clock_gettime() in the kernel entirely. :^)
Accesses are synchronized using two atomic integers that are incremented
at the start and finish of the kernel's time page update cycle.
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This is equivalent to `something.get()`, but more verbose.
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These integer => pointer => integer conversions were technically prone
to UB, since they were used as offsets (which are perfectly fine to be
zero), but we calculated them with pointer arithmetic. This made Clang
insert pointer overflow UBSAN checks, which trigger in case of a zero
result.
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Also added a large this value test (and strict variant) to ensure this
values have no regressions.
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This is a tiny difference and only changes anything for primitives in
strict mode. However this is tested in test262 and can be noticed by
overriding toString of primitive values.
This does now require one to wrap an object in a Value to call invoke
but all code using invoke has been migrated.
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Add a JS_ENUMERATE_INTL_OBJECTS macro and use it to generate:
- Forward declarations
- CommonPropertyNames class name members
- Constructor and prototype GlobalObject members, getters, visitors,
and initialize_constructor() calls
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This is the start of implementing ECMA-402 in LibJS, better known as the
ECMAScript Internationalization API.
Much like Temporal this gets its own subdirectory (Runtime/Intl/) as
well as a new C++ namespace (JS::Intl) so we don't have to prefix all
the files and classes with "Intl".
https://tc39.es/ecma402/
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This commit adds the PlainYearMonth object itself, its constructor and
prototype (currently empty), and the CreateTemporalYearMonth and
ISOYearMonthWithinLimits abstract operations.
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We need to ensure the temporary PrimitiveString cells don't get GC'd.
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PlainDate, PlainTime, and PlainDateTime already do this. All the others
should as well.
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FileSystemModel will now react to specific events from Core::FileWatcher
in order to granularly update its data based on addition or removal of
files from the tree. Metadata changes are currently not handled, but in
the future they can be used to re-stat() a file to get its updated
statistics.
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This commit has no functional changes.
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SortingProxyModel always expected the source model to have the same
number of rows as long as it has not been invalidated. Now that we have
granular updates, this assumption is no longer true, and we need to
resize the source/proxy_rows vectors to the new size. This is safe since
the values in the vector are overwritten right afterwards.
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These can be used by Model subclasses to signal the exact operations
that happened to a model, so that persistent model indices in that
area are not invalidated.
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This patch adds persistent indices to models. A PersistentModelIndex is
a ModelIndex that will survive most model updates (provided that the
data the PersistentModelIndex points to has not been removed by the
model's data store). PersistentModelIndex objects can be safely held
by objects outside the model they originated from.
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We always display the tree indent and the icon, so we shouldn't allow
the tree column to shrink beyond that size.
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Previously HeaderView would just assume that each column or row could
have a minimum size of 2. This makes it so that AbstractTableView
subclasses can provide a new minimum value for a specific column.
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After the update -> invalidate change a couple places broke when
update() was supposed to be manually called. This instance was not
marked virtual or override, which made it hard to detect. This commit
makes sure that update() on the original model is called when the
RunningProcessesModel needs an update.
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Although this is not spec-compliant, we don't have a way to represent
objects larger than `NumericLimits<size_t>::max()`. Since this abstract
operation is only used when dealing with object size, we don't lose any
functionality by taking that limit into account too.
This fixes a UBSAN error when compiling with Clang.
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