When booting AP's, we identity map a region at 0x8000 while doing the
initial bringup sequence. This is the only thing in the kernel that
requires an identity mapping, yet we had a bunch of generic API's and a
dedicated VirtualRangeAllocator in every PageDirectory for this purpose.
This patch simplifies the situation by moving the identity mapping logic
to the AP boot code and removing the generic API's.
Most of the models were just calling did_update anyway, which is
pointless since it can be unified to the base Model class. Instead, code
calling update() will now call invalidate(), which functions identically
and is more obvious in what it does.
Additionally, a default implementation is provided, which removes the
need to add empty implementations of update() for each model subclass.
Co-Authored-By: Ali Mohammad Pur <ali.mpfard@gmail.com>
...and also RangeAllocator => VirtualRangeAllocator.
This clarifies that the ranges we're dealing with are *virtual* memory
ranges and not anything else.
Improve the parsing of data urls in URLParser to bring it more up-to-
spec. At the moment, we cannot parse the components of the MIME type
since it is represented as a string, but the spec requires it to be
parsed as a "MIME type record".
`ue --profile --profile-file ~/some-file.profile id` can now generate a
full profile (instruction-by-instruction, if needed), at the cost of not
being able to see past the syscall boundary (a.la. callgrind).
This makes it significantly easier to profile seemingly fast userspace
things, like Loader.so :^)
`append()` is almost never going to select the overload that is desired.
e.g. it will append chars when you pass it a Vector<size_t>, which is
definitely not the right overload :)
This is a simple wrapper around posix_spawn() that will help us simplify
a bunch of very verbose posix_spawn() invocations.
This first version only supports the simplest case: executing an
executable without passing arguments or doing anything fancy. More
features can be added to cover more cases. :^)
Now that all KResult and KResultOr are used consistently throughout the
kernel, it's no longer necessary to return negative error codes.
However, we were still doing that in some places, so let's fix all those
(bugs) by removing the minuses. :^)
We were allocating thread FPU state separately in order to ensure a
16-byte alignment. There should be no need to do that.
This patch makes it a regular value member of Thread instead, dodging
one heap allocation during thread creation.
This patch gets rid of the "valid" bit in PageDirectory since it was
only used to communicate an allocation failure during construction.
We now do all the work in the static factory functions instead of in the
constructor, which allows us to simply return nullptr instead of an
"invalid" PageDirectory.
When constructing an AnonymousVMObject with the AllocateNow allocation
strategy we accidentally allocated the committed pages directly through
MemoryManager instead of taking them from our m_unused_physical_pages
CommittedPhysicalPageSet, which meant they were counted as allocated in
MemoryManager, but were still counted as unallocated in the PageSet,
who would then try to uncommit them on destruction, resulting in a
failed assertion.
To help prevent similar issues in the future a Badge<T> was added to
MM::allocate_committed_user_physical_page to prevent allocation of
commited pages not via a CommittedPhysicalPageSet.
