This makes the following scenario impossible with an SMP setup:
1) CPU A enters unref() and decrements the link count to 0.
2) CPU B sees the process in the process list and ref()s it.
3) CPU A removes the process from the list and continues destructing.
4) CPU B is now holding a destructed Process object.
By holding the process list lock before doing anything with it, we
ensure that other CPUs can't find this process in the middle of it being
destructed.
This allows us to 1) let go of the Process when an inode is ref'ing for
ProcFSExposedComponent related reasons, and 2) change our ref/unref
implementation.
This adds a stub for fnmatch and the following defined values:
- FNM_PATHNAME
- FNM_NOESCAPE
- FNM_PERIOD
- FNM_FILE_NAME
- FNM_LEADING_DIR
- FNM_CASEFOLD
- FNM_EXTMATCH
A hub can technically have up to 255 ports, given that bNbrPorts is a
u8 and the DeviceRemovable field is a VLA to support up to 255 ports.
Source: USB 2.0 Specification Section 11.23.2.1
That means this enum is not going to scale well in terms of size.
Replacing it with a raw u8 allows me to remove the two port assumption
and a cast.
Previously it would create a contiguous AVMO manually and pass it to
MM. This uses supervisor pages that quickly run out as they never get
returned and crash the system.
Instead, use allocate_kernel_region as we're only allocating a page so
it will be contiguous and will be returned when destroyed.
A potentially better solution would be to use a pool of transfers to
avoid all the allocations. This just prevents the system from crashing
within ~5 seconds from the continuous hub polling.
The function arguments almost always optimized away, so you never get
much value out of showing these in the default back trace view, it just
adds a bunch of extra stuff that you need to visual wade through.
So lets disable showing them.
`--version` always prints "git" for now.
The motivation is that the neofetch port calls `Shell --version` and
adds the output to its output. And if `Shell --version` prints a long
error message about it not knowing the flag, neofetch's output looks a
bit ugly. Per Discord discussion, just add the flag to ArgsParser
instead of only to Shell.
When overriding visit_edges() in a JS::Object subclass, we must make
sure to call the base class visit_edges(), or the object's Shape (and
any properties) will not get marked.
