This reverts commit 11896d0e26.
This caused a race where other processes using the same InodeVMObject
could end up accessing the newly-mapped physical page before we've
actually filled it with bytes from disk.
It would be nice to avoid these copies without breaking anything.
We were doing this for the initial kernel-spawned userspace process(es)
to work around instability in the page fault handler. Now that the page
fault handler is more robust, we can stop worrying about this.
Specifically, the page fault handler was previous not able to handle
getting a page fault in anything but the currently executing task's
page directory.
This library is meant to provide C++-style wrappers over lower
level APIs such as syscalls and pthread_* functions, as well as
utilities for easily running pieces of logic on different
threads.
- TmpFSInode::write_bytes() needs to allow non-zero offsets
- TmpFSInode::read_bytes() wasn't respecting the offset
GCC puts the temporary files generated during compilation in /tmp,
so this exposed some bugs in TmpFS.
KBuffer is just meant to be a dumb wrapper around KBufferImpl.
With this change, we actually start to see KBuffers with different size
and capacity, which allows some reallocation-avoiding optimizations.
This papers over an immediate issue where pseudoterminals would choke
on more than 16 characters of pasted input in the GUI terminal.
Longer-term we should find a more elegant solution than using a static
size CircularQueue for this.
The scheduler is not allowed to take locks, so if that's happening,
we want to make that clear instead of crashing with the more general
"Interrupts disabled while trying to take Lock" error.
Here comes the foundation for a neat remote debugging tool.
Right now, it connects to a remote process's CEventLoop RPC socket and
retreives the remote object graph JSON dump. The remote object graph
is then reconstructed and exposed through a GModel subclass, which is
then displayed in a GTreeView.
It's pretty cool, I think. :^)
This implements a very basic VGA device using the information provided
to us by the bootloader in the multiboot header. This allows Serenity to
boot to the desktop on basically any halfway modern system.
The complication is around /proc/sys/ variables, which were attached
to inodes. Now they're their own thing, and the corresponding inodes
are lazily created (as all other ProcFS inodes are) and simply refer
to them by index.
This is kind of a mess, but because IPC client code depending on the
IPC protocol definition artifacts in the server code, we have to build
the IPC servers first. And their dependencies before that, etc.
One more drop in the "maybe we should switch to CMake" bucket..
makeall.sh used to build the AK tests and leave some binary objects laying
around that would get in the way of further incremental builds. There also
wasn't a lot of structure to the order things were built in. This patch
improves both of those things.
It is now possible to unmount file systems from the VFS via `umount`.
It works via looking up the `fsid` of the filesystem from the `Inode`'s
metatdata so I'm not sure how fragile it is. It seems to work for now
though as something to get us going.
We were forced to do this because the page fault code would fall apart
when trying to generate a backtrace for a non-current thread.
This issue has been fixed for a while now, so let's go back to lazily
loading executable pages which should make everything a little better.
