`convert_nodes_to_single_node` is inside its own file so ChildNode can
include and use it without having to include other headers such as
DOM/Node.h. This is to prevent circular includes.
When I did a fresh build of ports, I got this while building fontconfig:
```
checking for FREETYPE... no
configure: error: Package requirements (freetype2 >= 21.0.15) were not
met:
No package 'freetype2' found
Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.
Alternatively, you may set the environment variables FREETYPE_CFLAGS
and FREETYPE_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.
```
Added the call to generate_available_values(), then realized it is the
exact same as the existing, manually written implementation. So let's
use the new utility.
Intl.NumberFormat is meant to format both Number and BigInt types. To
prepare for formatting BigInt types, this generalizes our NumberFormat
implementation to operate on Value instances rather than doubles. All
arithmetic is moved to static helpers that can now be updated with
BigInt semantics.
Even if the PIC was disabled it can still generate noise (spurious IRQs)
so we need to register two handlers for handling such cases.
Also, we declare interrupt service routine offset 0x20 to 0x2f as
reserved, so when the PIC is disabled, we can handle spurious IRQs from
the PIC at separate handlers.
The hard part of parsing them in import statements and calls was already
done so this is just removing some check which threw before on
assertions. And filtering the assertions based on the result of a new
host hook.
Because we can have arbitrary in- and export names with strings we can
have '*' and '' which means using '*' as an indicating namespace imports
failed / behaved incorrectly for string imports '*'.
We now use more specific types to indicate these special states instead
of these 'magic' string values.
Do note that 'default' is not actually a magic string value but one
specified by the spec. And you can in fact export the default value by
doing: `export { 1 as default }`.
At the end of sys$execve(), we perform a context switch from the old
executable into the new executable.
However, the Kernel::Thread object we are switching to is the *same*
thread as the one we are switching from. So we must not assume the
from_thread and to_thread are different threads.
We had a bug caused by this misconception, where the "from" thread would
always get marked as "inactive" when switching to a new thread.
This meant that threads would always get switched into "inactive" mode
on first context switch into them.
If a thread then tried blocking on a kernel mutex within its first time
slice, we'd end up in Thread::block(Mutex&) with an inactive thread.
Once a thread is inactive, the scheduler believes it's okay to
reactivate the thread (by scheduling it.) If a thread got re-scheduled
prematurely while setting up a mutex block, things would fall apart and
we'd crash in Thread::block() due to the thread state being "Runnable"
instead of the expected "Running".
Move this architecture-specific sanity check (IOPL must be 0) out of
Scheduler and into the x86 enter_thread_context(). Also do this for
every thread and not just userspace ones.
