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serenity/Kernel/Syscalls
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Tom 75f61fe3d9 AK: Make RefPtr, NonnullRefPtr, WeakPtr thread safe 
This makes most operations thread safe, especially so that they
can safely be used in the Kernel. This includes obtaining a strong
reference from a weak reference, which now requires an explicit
call to WeakPtr::strong_ref(). Another major change is that
Weakable::make_weak_ref() may require the explicit target type.
Previously we used reinterpret_cast in WeakPtr, assuming that it
can be properly converted. But WeakPtr does not necessarily have
the knowledge to be able to do this. Instead, we now ask the class
itself to deliver a WeakPtr to the type that we want.

Also, WeakLink is no longer specific to a target type. The reason
for this is that we want to be able to safely convert e.g. WeakPtr<T>
to WeakPtr<U>, and before this we just reinterpret_cast the internal
WeakLink<T> to WeakLink<U>, which is a bold assumption that it would
actually produce the correct code. Instead, WeakLink now operates
on just a raw pointer and we only make those constructors/operators
available if we can verify that it can be safely cast.

In order to guarantee thread safety, we now use the least significant
bit in the pointer for locking purposes. This also means that only
properly aligned pointers can be used.
2020-11-10 19:11:52 +01:00
..
access.cpp Kernel: Convert some more syscalls to Userspace<T> 2020-08-02 11:01:00 +02:00
alarm.cpp Kernel: Move syscall implementations out of Process.cpp 2020-07-30 23:40:57 +02:00
beep.cpp Kernel: Move syscall implementations out of Process.cpp 2020-07-30 23:40:57 +02:00
chdir.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
chmod.cpp Kernel: Use Userspace<T> for the chmod syscall 2020-08-10 12:52:15 +02:00
chown.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
chroot.cpp Kernel: Use Userspace<T> for the chroot syscall 2020-08-10 12:52:15 +02:00
clock.cpp Kernel+LibC: Add adjtime(2) 2020-11-10 19:03:08 +01:00
debug.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
disown.cpp Kernel: PID/TID typing 2020-08-10 11:51:45 +02:00
dup2.cpp Kernel+LibC+UserspaceEmulator: Bring back sys$dup2() 2020-08-15 11:11:34 +02:00
execve.cpp Kernel: Fix a few deadlocks with Thread::m_lock and g_scheduler_lock 2020-10-26 08:57:25 +01:00
exit.cpp Kernel: Move syscall implementations out of Process.cpp 2020-07-30 23:40:57 +02:00
fcntl.cpp Kernel: Turn Process::FileDescriptionAndFlags into a proper class 2020-07-30 23:50:31 +02:00
fork.cpp AK: Make RefPtr, NonnullRefPtr, WeakPtr thread safe 2020-11-10 19:11:52 +01:00
ftruncate.cpp Kernel: Move syscall implementations out of Process.cpp 2020-07-30 23:40:57 +02:00
futex.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
get_dir_entries.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
get_stack_bounds.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
getrandom.cpp Meta+Kernel: Make clang-format-10 clean 2020-09-25 21:18:17 +02:00
getuid.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
hostname.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
ioctl.cpp Kernel: Remove SmapDisabler in sys$ioctl() 2020-07-31 00:17:25 +02:00
kill.cpp Kernel: Rename Process::is_ring0/3 to Process::is_kernel/user_process 2020-09-10 19:57:15 +02:00
link.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
lseek.cpp Kernel: Move syscall implementations out of Process.cpp 2020-07-30 23:40:57 +02:00
mkdir.cpp Kernel: Convert some more syscalls to Userspace<T> 2020-08-02 11:01:00 +02:00
mknod.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
mmap.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
module.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
mount.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
open.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
perf_event.cpp Kernel: Move syscall implementations out of Process.cpp 2020-07-30 23:40:57 +02:00
pipe.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
pledge.cpp Kernel: Unbreak sys$pledge() 2020-09-17 15:07:20 +02:00
process.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
profiling.cpp Kernel: Remove ProcessInspectionHandle and make Process RefCounted 2020-08-02 17:15:11 +02:00
ptrace.cpp Meta+Kernel: Make clang-format-10 clean 2020-09-25 21:18:17 +02:00
purge.cpp Kernel: Move syscall implementations out of Process.cpp 2020-07-30 23:40:57 +02:00
read.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
readlink.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
realpath.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
rename.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
rmdir.cpp Kernel: Convert some more syscalls to Userspace<T> 2020-08-02 11:01:00 +02:00
sched.cpp Kernel: Make Thread refcounted 2020-09-27 19:46:04 +02:00
select.cpp Meta+Kernel: Make clang-format-10 clean 2020-09-25 21:18:17 +02:00
sendfd.cpp Kernel: Move syscall implementations out of Process.cpp 2020-07-30 23:40:57 +02:00
setkeymap.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
setpgid.cpp Kernel: Distinguish between new and old process groups with equal pgids 2020-08-19 21:21:34 +02:00
setuid.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
shbuf.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
shutdown.cpp Kernel: Add shutdown commands for other virtualizers 2020-08-30 10:31:39 +02:00
sigaction.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
socket.cpp Kernel+LibC+UserspaceEmulator: Add SO_TIMESTAMP, and cmsg definitions 2020-09-17 17:23:01 +02:00
stat.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
sync.cpp Kernel: Move syscall implementations out of Process.cpp 2020-07-30 23:40:57 +02:00
sysconf.cpp Kernel: Implement _SC_OPEN_MAX 2020-09-27 01:02:11 +02:00
thread.cpp Kernel: Fix a few deadlocks with Thread::m_lock and g_scheduler_lock 2020-10-26 08:57:25 +01:00
times.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
ttyname.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
umask.cpp Kernel: Move syscall implementations out of Process.cpp 2020-07-30 23:40:57 +02:00
uname.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
unlink.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
unveil.cpp Kernel: Prevent unveil returning ENOENT with cpath permissions 2020-11-10 09:53:18 +01:00
utime.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
waitid.cpp Kernel: Make Thread refcounted 2020-09-27 19:46:04 +02:00
watch_file.cpp Kernel: Use Userspace<T> in more syscalls 2020-08-01 11:37:40 +02:00
write.cpp Kernel: Use Userspace<> for sys$writev 2020-09-15 20:20:38 +02:00