a33a72915e
Scheduler: Creation, destruction and switching of userspace tasks :))
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From a TarStream. Not optimal, but OK for the moment.
2023-01-05 21:52:26 +01:00
ea89b92675
Store a bit more stuff in a thread :)
2023-01-05 21:50:53 +01:00
5854e5e530
Add newlines at end-of-file
2023-01-02 13:07:29 +01:00
a3595e71a9
Update .clang-format
continuous-integration/drone/push Build is passing
2022-12-21 20:22:44 +01:00
a11a5dec1f
DoublyLinkedList -> LinkedList
continuous-integration/drone/push Build is passing
2022-12-19 12:43:23 +01:00
1269a045bd
LinkedList: Add a convenience delayed_for_each() method.
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This is a special way of iterating over the list which permits removing items while iterating.
2022-12-19 12:41:25 +01:00
92a7004c2f
Move the reaping logic to Scheduler
2022-12-19 12:24:15 +01:00
0bdbffe0ca
Spinlock+LockedValue: Add try_lock() methods
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continuous-integration/drone/push Build is passing
For when you want to lock a resource if possible but not get blocked if it is locked by another thread.
2022-12-18 20:37:26 +01:00
283e641ece
Spinlock+LockedValue: Remove init() functions
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Let's set the default (unlocked) value of Spinlock's underlying atomic to 0, so even if the constructor is not called it stays like that.
2022-12-18 20:36:15 +01:00
751377de0a
Scheduler: Make it possible for a thread to stop existing
continuous-integration/drone/push Build is passing
2022-12-18 18:43:34 +01:00
1b92fe36b4
Store the stack inside a thread
2022-12-18 18:43:17 +01:00
a89ae9bed7
Run include-what-you-use
continuous-integration/drone/push Build is passing
2022-12-17 15:51:19 +01:00
d5b9ff1569
Remove unused function definition
continuous-integration/drone/push Build is passing
2022-12-17 15:30:57 +01:00
f97515bd7e
Kernel: Add Spinlock and LockedValue<T>
2022-12-17 10:55:54 +01:00
6e5d2b5335
Thread: Make g_next_id atomic
2022-12-17 10:50:49 +01:00
a32590ff8a
Call expect_value more
2022-12-16 19:44:33 +01:00
cedcfa9c63
Improve cleanup on MemoryManager failure + add methods that use KernelVM
continuous-integration/drone/push Build is passing
2022-12-16 19:36:38 +01:00
b6173e2b67
LinkedList: Return Option instead of ENONE if no value
2022-12-08 16:09:04 +01:00
779fda307a
More scope guards!!
continuous-integration/drone/push Build is passing
2022-12-08 15:01:04 +01:00
1d5d1daa57
Add scope guards
2022-12-08 14:56:11 +01:00
d93d95f23c
Add sleeping mechanism
2022-12-07 16:11:59 +00:00
757cee4693
Add accessors for when you're sure a linked list is not empty
2022-12-07 16:11:59 +00:00
70497c37fb
Check for runnable threads
2022-12-07 16:11:59 +00:00
57517252d8
Add a state to Thread
2022-12-07 16:11:59 +00:00
13f5d09cfd
Add a Scheduler!!
2022-12-07 16:11:59 +00:00
12aa014a3d
Add a Thread class which can be part of a DoublyLinkedList
2022-12-07 16:11:59 +00:00
cf758fdfdc
Initial commit :)
2022-11-13 10:09:09 +01:00
42efc21110
Start implementing read and write support in tmpfs
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write seems to work fine, read just hangs there, waiting.
2022-11-12 20:11:26 +01:00
000ffd1fae
Scheduler: Handle weird cases when the task we're iterating on is null
2022-11-12 18:12:42 +01:00
58fb422161
Kernel: Return a Result in MemoryManager and strdup_from_user
2022-11-12 11:56:40 +01:00
662afad426
Kernel: Add a Result class
2022-11-12 11:30:28 +01:00
1ea216dfd1
Kernel: Rename assert.h to ensure.h
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The macro is named "ensure", the header file should reflect that.
2022-11-09 15:28:35 +01:00
ea94b331fb
Scheduler: Use copy_to_user in a few system calls
2022-11-09 15:20:53 +01:00
033c41cbd7
Kernel: Rework the uid/gid system to make it compliant
2022-11-09 09:54:07 +01:00
44815b08c7
Kernel: Use copy_from_user() and copy_to_user() in read/write
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This is huge. Finally, we can do proper reads/writes with invalid addresses, or big buffers.
2022-11-06 15:19:23 +01:00
9ab3ab7c40
Kernel: Show init's exit status before restarting
2022-11-05 11:56:16 +01:00
0fd31698b2
Kernel: Accept not opened file descriptors in dup2()
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This involves renaming the descriptor_from_fd function to the more appropriately named
open_descriptor_from_fd (since we check if the descriptor was opened and error out otherwise),
and creating a new function that does not verify that the file descriptor was opened.
2022-11-03 16:52:21 +01:00
c604c074a1
Kernel: Rename ASSERT() to ensure()
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Doesn't get stripped on release builds, so it shouldn't be named assert.
2022-11-02 19:38:15 +01:00
e5cf32c7b3
Kernel: Introduce page ownership
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Some pages, such as framebuffer pages, are not physical memory frames reserved for the current process.
Some, such as the framebuffer, may be shared between all processes.
Yet, on exit() or on exec(), a process frees all frames mapped into its address spaces.
And on fork(), it copies all data between frames. So how could we map framebuffers.
Simple: we use one of the bits in page table entries which are available to the OS, and mark whether that page is owned by the current process.
If it is owned, it will be:
- Freed on address space destruction
- Its data will be copied to a new page owned by the child process on fork()
If it is not owned, it will be:
- Left alone on address space destruction
- On fork(), the child's virtual page will be mapped to the same physical frame as the parent
This still needs a bit more work, such as keeping a reference of how many processes use a page to free it when all processes using it exit/exec.
This should be done for MAP_SHARED mappings, for example, since they are not permanent forever,
unlike the framebuffer for example.
2022-11-02 19:32:28 +01:00
5eae93bbb0
Bugfix: do not crash if we are blocking for no reason
2022-10-30 20:51:32 +01:00
29c59abf7d
Kernel: Rename blocking_wait_info's wait_pid to pid
2022-10-30 19:28:43 +01:00
9c3792718c
Kernel: Remove waitpid() debug messages and add more checks
2022-10-30 19:24:56 +01:00
c68d040484
Scheduler: Make sure we are in the kernel's address space when resuming a blocked process
2022-10-30 19:10:46 +01:00
b8296eb92d
su: Also set group ID
2022-10-28 17:55:56 +02:00
09a615bd99
Kernel, libc: Expose processes' UID and GID in pstat()
2022-10-28 17:31:34 +02:00
0115cce750
Kernel/VFS: Add file owners and file modes, and check those in system calls
2022-10-28 17:10:28 +02:00
16dc227a05
Kernel: Add UID and GID fields to Task
2022-10-28 17:06:13 +02:00
fcf53ef6a5
Kernel: Make waitpid() block by default unless WNOHANG is specified
2022-10-27 17:05:42 +02:00
06e6429567
Kernel: Reorganize a bit of scheduler code
2022-10-27 08:07:34 +02:00
af46b8d9ac
Kernel: Cleanup file descriptor validation
2022-10-25 18:35:17 +02:00
