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943 commits

Author SHA1 Message Date
Andreas Kling
ba7364b43b Shell: Move line editing to a separate class. 
To be clear, there isn't really any line editing yet. But there is
going to be, so let's have it in its own class.
 2019-05-07 01:39:41 +02:00
Andreas Kling
fe73543d41 Shell: Move the Shell to a separate directory and let's call it "Shell" :^) 2019-05-07 01:12:08 +02:00
Andreas Kling
72cbcd8e98 Kernel: Dump backtrace on exit() syscall. 
This makes assertion failures a lot more pleasant to investigate.
 2019-05-06 21:48:48 +02:00
Andreas Kling
6228503c16 Kernel: Add a bit of logging in VMObject::inode_size_changed(). 2019-05-04 21:15:59 +02:00
Andreas Kling
932836e3c7 Kernel: Computing the boot timestamp was a bit broken. 2019-05-04 17:05:42 +02:00
Andreas Kling
5e938868a2 IPv4: Rename source/destination in socket classes to local/peer. 
It was way too ambiguous who's the source and who's the destination, and it
didn't really follow a logical pattern. "Local port" vs "Peer port" is super
obvious, so let's call it that.
 2019-05-04 16:40:34 +02:00
Andreas Kling
780d2a08c4 IPv4: Save the source address/port together with incoming packet payloads. 
We need the address/port to fill in the out-params in recvfrom().
It should now be more or less possible to create a UDP server. :^)
 2019-05-04 03:27:50 +02:00
Andreas Kling
c4bb9a3ccb sync.sh: Add "-f" option to forcibly regenerate _fs_contents from scratch. 
This might be useful e.g if something goes wrong with the filesystem.
 2019-05-04 02:56:21 +02:00
Andreas Kling
f137881147 run: Make it easy to override which qemu executable is used. 
Patch contributed by "pd"
 2019-05-04 02:52:51 +02:00
Andreas Kling
7aba0058ae sync.sh: Don't regenerate _fs_contents from /dev/zero every time. 
This makes sync.sh run a lot faster, especially on slower machines.

Patch contributed by "pd"
 2019-05-04 02:50:10 +02:00
Andreas Kling
8b249bd09b Kernel+Userland: Implement mknod() syscall and add a /bin/mknod program. 2019-05-03 22:59:58 +02:00
Andreas Kling
abb5c890e0 IPv4: Implement bind() for TCP and UDP sockets. 
We can't accept connections just yet, but this patch makes it possible to
bind() to a given source address/port.
 2019-05-03 21:51:40 +02:00
Andreas Kling
2470fdcd9b Kernel: Make Socket inherit from File. 2019-05-03 20:42:43 +02:00
Andreas Kling
03da7046bd Kernel: Prepare Socket for becoming a File. 
Make the Socket functions take a FileDescriptor& rather than a socket role
throughout the code. Also change threads to block on a FileDescriptor,
rather than either an fd index or a Socket.
 2019-05-03 20:15:54 +02:00
Andreas Kling
34c5db61aa Kernel: Simplify VMObject::is_anonymous(). 
This doesn't need a separate flag. A VMObject is always anonymous if it has
no backing inode.
 2019-05-02 23:34:28 +02:00
Andreas Kling
b8e60b6652 Kernel: Remove unused Region::is_bitmap(). 2019-05-02 23:31:11 +02:00
Andreas Kling
25ddcd1022 Kernel: Emit systrace events for exit, thread_exit and sigreturn. 
Since these syscalls don't return to caller, we have to emit the trace
events manually.
 2019-05-02 15:49:48 +02:00
Andreas Kling
c3b7ace3e0 Kernel: Assign Lock names in class member initializers. 2019-05-02 03:28:20 +02:00
Mustafa Ali CAN
9fa8324f7a Fix jittery mouse 2019-05-01 21:54:41 +02:00
Andreas Kling
28244039a5 Kernel: Don't symbolicate symbol+offset for obvious non-kernel addresses. 2019-04-30 14:47:22 +02:00
Andreas Kling
14ac77131b Kernel: The exit_thread() syscall should unlock the big lock. 
Since exit_thread() never returns, it can't rely on the syscall trap handler
to unlock the big lock before returning.
 2019-04-29 15:56:25 +02:00
Andreas Kling
d07be1087a Kernel+LibC: Add exit_thread() syscall. 2019-04-29 15:17:20 +02:00
Andreas Kling
8cbb7f101f Kernel: Have File virtuals take a FileDescriptor& rather than a Process&. 
This will allow us to implement different behaviors depending on the role
of the descriptor a File is being accessed through.
 2019-04-29 13:58:40 +02:00
Andreas Kling
0a0d739e98 Kernel: Make FIFO inherit from File. 2019-04-29 04:55:54 +02:00
Andreas Kling
475a17fa4b VFS: Also respect the sticky bit of the new parent in rename(). 
Obviously we should not allow overwriting someone else's files in a sticky
directory either.
 2019-04-28 23:34:33 +02:00
Andreas Kling
e4eca17848 VFS: Implement sticky bit behavior for rename() and unlink(). 
Removing entries from a sticky directory is only allowed when you are either
the owner of the entry, or the superuser. :^)
 2019-04-28 22:54:30 +02:00
Andreas Kling
a104d7cc93 Kernel: Make SharedMemory inherit from File. 2019-04-28 22:31:31 +02:00
Andreas Kling
a6d407fec5 Ext2FS: Put some debug spam behind EXT2_DEBUG. 2019-04-28 22:14:37 +02:00
Andreas Kling
899f6a5de2 Ext2FS: Support shrinking inode to a smaller size. 
Factor out inode resizing into a separate Ext2FSInode::resize() function.
This is then called both from write_bytes() and truncate().
This patch finally implements freeing of blocks when an inode shrinks.
 2019-04-28 22:07:25 +02:00
Andreas Kling
89df887e1f Kernel: Dump backtrace on user process page fault. 2019-04-28 22:05:13 +02:00
Andreas Kling
c91b0d6b5f FileDescriptor: Let TTY handle its own absolute_path(). 2019-04-28 15:09:23 +02:00
Andreas Kling
e886337a67 Kernel: Make ProcessTracer inherit from File. 2019-04-28 15:02:55 +02:00
Andreas Kling
7ec1f6ab3c Kernel: Add File, a base class for anything that a FileDescriptor can wrap. 
FileDescriptor is getting out of control, and the layering isn't quite right
so let's make a File class that everything can inherit from. Then we can
stop worrying about all kinds of specifics in FileDescriptor.
 2019-04-28 14:53:50 +02:00
Andreas Kling
d32d85e133 Kernel: Fix rename() sometimes failing to move within the same directory. 
It was wrong to do a reverse name lookup on the old inode after adding
a new name for it, since we might very well get the new inode instead of
the old one, depending on hash table layouts.
 2019-04-27 22:38:51 +02:00
Andreas Kling
52139a2392 DiskBackedFS: Flush write cache if it reaches 32 entries before sync. 
This is just to avoid chewing through all of the kernel memory. There is a
lot of room for improvement here, and 32 is just a number from the place
where numbers come from.
 2019-04-27 17:30:32 +02:00
Andreas Kling
dde8d90747 Ext2FS: Fix accidental zero-fill when appending to a file. 
We were using the old file size, rather than the new file size, to determine
how much to zero-fill in the last block of a file.
 2019-04-27 17:14:27 +02:00
Andreas Kling
679ac386eb Kernel: "Succeed" quietly for zero-length read() and write(). 2019-04-27 16:17:24 +02:00
Andreas Kling
490e89e240 LibC: Add execvpe() and make execvp()'ed children inherit environment. 2019-04-26 03:16:26 +02:00
Andreas Kling
1163e0a030 Kernel: Don't count kfree(nullptr) as a call to kfree(). 
This was causing the kmalloc/kfree call delta to accumulate errors.
 2019-04-25 23:18:11 +02:00
Andreas Kling
44673c4f3b Kernel: Add a write cache to DiskBackedFS. 
This way you can spam small write()s on a file without the kernel writing
to disk every single time. Flushes are included in the FS::sync() operation
and will get triggered regularly by syncd. :^)
 2019-04-25 22:05:53 +02:00
Andreas Kling
e0cdc5db0d Ext2FS: Reduce debug spam in block allocation. 2019-04-25 22:05:32 +02:00
Andreas Kling
6c950f8f83 Kernel: Dump stack trace when kmalloc() fails. 2019-04-25 15:58:49 +02:00
Andreas Kling
d5578826af Kernel: Make it possible to look up FIFO's by ID. 
This will be useful when implementing the /proc/PID/fd/N links where N is
a file descriptor referring to a FIFO.
 2019-04-25 13:53:24 +02:00
Andreas Kling
16f6a3af3c Allow passing extra args to qemu via a SERENITY_EXTRA_QEMU_ARGS env var. 2019-04-24 21:06:16 +02:00
Andreas Kling
d7cf841d3d Kernel: Add a comment block about the Device class. 2019-04-24 02:37:57 +02:00
Andreas Kling
ca9ed13643 Kernel: Simplify Device::open(). 2019-04-24 02:20:14 +02:00
Andreas Kling
c5c4e54a67 Kernel: Process destruction should destroy all child threads. 
We were only destroying the main thread when a process died, leaving any
secondary threads around. They couldn't run, but because they were still
in the global thread list, strange things could happen since they had some
now-stale pointers to their old process.
 2019-04-23 22:17:01 +02:00
Andreas Kling
0c898e3c2c Put assertions behind a DEBUG flag to make it easy to build without them. 2019-04-23 21:52:02 +02:00
Andreas Kling
f3754b8429 Build: Pass --gc-sections to the linker in all builds. 
This removes unused sections from the output and reduces the binary size
of everything we compile.
 2019-04-23 21:37:10 +02:00
Andreas Kling
f042b3adeb Kernel: Make the right shift key work. 
I never realized the right shift key wasn't hooked up since my left pinky
always hovers over the left shift key, ready to rock.
 2019-04-23 20:47:45 +02:00