Since these are just interpreted comments, there's 0 impact on actual code.
This removes all lines that match /* vim: set(.*)tw=80: */ with S&R -- there are
a few others scattered around which will be removed manually in a second part.
The added debug assertion does not work due to missing API.
They were added in BZ 1337491, 1395366, and others, but were primarily used for multi-threading.
This uses our existing non-multithreaded syntax instead, resolving a `no member named` build error.
According to the spec this isn't created until the module is instantiated, but
we create it when we compile the module.
We stored this previously in InitialEnvironmentSlot and copied it to
EnvironmentSlot when it was supposed to be created, but we can just store it in
the latter slot straight away and check the module's status and return null if
it shouldn't exist yet.
This reduces the number of slots needed on a moduleObject to 17.
Re: BZ 1420412 Part 1
We can't implement the second part to further reduce our number of slots,
because it relies on SetProxyReservedSlot which in turn relies on
rearchitecturing JS proxies to make reserved slots dynamic. That's a rabbit hole
we really don't want to fall into.
So, we'll end up being a bit slower because it can't be in-line allocated with
having more than 16 slots, but so be it. I sincerely doubt it will make any
practical difference.
This updates module implementation to match spec regarding handling of
instantiation errors, after it was changed yet again, this time to not remember
instantiation errors, but instead immediately rethrow applicable ones.
Ref: BZ 1420420
JIT optimizations involving the Javascript 'arguments' object could
potentially confuse later optimizations, so we simply disable these
optimizations as a DiD measure.
This changes NativeObject::slotSpan() to get the class from the object group
rather than getting it from the base shape to avoid a race between
Shape::ensureOwnBaseShape and background sweeping.
For checking if a module is in an error state and what the error is, it
shouldn't matter if we are currently GC-ing or not. So we don't need to check
for it, which removes the requirement to pass in the JS context (needed for
AssertHeapIsIdle's runtime check); this unblocks progress where otherwise we'd
have to figure out what the context is at the module level just to satisfy this
check.
