Calling shutdown prevents further reads and/or writes on a socket.
We should do a few more things based on the type of socket, but this
initial implementation just puts the basic mechanism in place.
Work towards #428.
The idea behind WeakPtr<NetworkAdapter> was to support hot-pluggable
network adapters, but on closer thought, that's super impractical so
let's not go down that road.
If there's not enough space in the output buffer for the whole sockaddr
we now simply truncate the address instead of returning EINVAL.
This patch also makes getpeername() actually return the peer address
rather than the local address.. :^)
According to POSIX, waitid() should fill si_signo and si_pid members
with zeroes if there are no children that have already changed their
state by the time of the call. Let's just fill the whole structure
with zeroes to avoid leaking kernel memory.
sys$waitid() takes an explicit description of whether it's waiting for a single
process with the given PID, all of the children, a group, etc., and returns its
info as a siginfo_t.
It also doesn't automatically imply WEXITED, which clears up the confusion in
the kernel.
We add this feature together with the VMWareBackdoor class.
VMWareBackdoor class is responsible for enabling the vmmouse, and then
controlling it from the PS2 mouse IRQ handler.
On my system (Void Linux) the root user has a default umask of 0077,
causing files and directories in the disk image to have zero group and
world permissions.
This patch introduces sys$perf_event() with two event types:
- PERF_EVENT_MALLOC
- PERF_EVENT_FREE
After the first call to sys$perf_event(), a process will begin keeping
these events in a buffer. When the process dies, that buffer will be
written out to "perfcore" in the current directory unless that filename
is already taken.
This is probably not the best way to do this, but it's a start and will
make it possible to start doing memory allocation profiling. :^)
Before putting itself back on the wait queue, the finalizer task will
now check if there's more work to do, and if so, do it first. :^)
This patch also puts a bunch of process/thread debug logging behind
PROCESS_DEBUG and THREAD_DEBUG since it was unbearable to debug this
stuff with all the spam.
Since we scrub both kmalloc() and kfree() with predictable values, we
can log a helpful message when hitting a crash that looks like it might
be a dereference of such scrubbed data.
DoubleBuffer is the internal buffer for things like TTY, FIFO, sockets,
etc. If you try to write more than the buffer can hold, it will now
do a short write instead of asserting.
This is likely to expose issues at higher levels, and we'll have to
deal with them as they are discovered.
Previously this API would return an InodeIdentifier, which meant that
there was a race in path resolution where an inode could be unlinked
in between finding the InodeIdentifier for a path component, and
actually resolving that to an Inode object.
Attaching a test that would quickly trip an assertion before.
Test: Kernel/path-resolution-race.cpp
