Bananymous/banan-os
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390a7674b15278f6e3aea66041b90a004ce8f54e
Commit Graph
57 Commits
Author SHA1 Message Date
Bananymous 390a7674b1 LibC: Fix uthread deallocation 
Update dtv[0] to the max loadad module when loading dynamic modules

Free uthread if stack allocation or mprotect fails on pthread_create

Don't unmap the currently used stack when detached thread exits
 2026-07-20 04:07:23 +03:00
Bananymous 917321eb5f LibC: Wait for thread before returning from pthread_create 
We now make sure the thread starts up and sets its id. There was a race
condition where a process could create a thread and immediately try to
join it. If the thread had not initialized itself the join would fail
with EINVAL as we passed -1 as its id.
 2026-07-03 02:14:10 +03:00
Bananymous 50fd526e6f LibC: Implement pthread_{get,set}name_np 2026-07-02 20:02:24 +03:00
Bananymous c0e091b647 LibC: Implement pthread_{get,set}attr_default_np 2026-07-02 20:02:24 +03:00
Bananymous 372da006d0 LibC: Implement pthread_getattr_np 2026-07-02 20:02:24 +03:00
Bananymous 0dc74beb0f Kernel/LibC: Allocate thread stacks in userspace 
This adds support for pthread function for stack manipulation.

Also keep track of main threads stack in the uthread
 2026-07-02 20:02:24 +03:00
Bananymous 7bdd9d19d0 LibC: Cleanup uthread initialization 
This is now done in a constructor function in pthread.cpp
 2026-07-02 20:02:24 +03:00
Bananymous b19b7f064a LibC: Make pthread_t pointer to uthread instead of a thread id 
This will allow getting info about other threads in userspace!
 2026-07-02 20:02:24 +03:00
Bananymous f449ca8161 Kenrel: Separate pthread API from kernel API 
It didn't really make sense for the syscalls to be named as the pthread
equivalents. Now the kernel just uses thread ids
 2026-07-02 20:02:24 +03:00
Bananymous 6f002f0c07 LibC: Make pthread_{equal,self,testcancel} static inline 
This allows using ::pthread_self or &pthread_self
 2026-06-30 20:14:38 +03:00
Bananymous 9c79971bdc LibC/Kernel: Add support for detached pthreads 2026-05-17 00:40:56 +03:00
Bananymous ff75c15ba3 LibC: Move pthread keys to TCB 
This removes all TLS relocations from libc which may become handy ;)
 2026-05-17 00:29:20 +03:00
Bananymous 558ed8fd44 LibC: Define pthread_{equal,self} as macros 
These really should get inlined :D
 2026-04-21 00:25:16 +03:00
Bananymous 7fb27b16e8 LibC: Fix pthread cancellation 
Install SIGCANCEL handler for all threads.

Remove unneeded atomic stores and loads. States are only changed within
the thread itself.

Define pthread_testcancel as a macro so it gets inlined inside
cancellation points
 2026-04-07 03:41:25 +03:00
Bananymous 34b59f062b LibC: Implement blocking pthread_rwlock 
pthread_rwlock now uses a mutex and condition variable internally so it
doesn't need to yield while waiting!
 2026-04-06 19:29:34 +03:00
Bananymous ec4aa8d0b6 LibC: Fix shared pthread_barrier init 
Initialize internal lock and cond as shared when the barrier is shared
 2026-04-05 12:06:18 +03:00
Bananymous 1eebe85071 LibC: Fix pthread_cond_timedwait 
If timeout occurred, I was not removing the entry from block list
 2026-04-05 11:31:16 +03:00
Bananymous c7690053ae LibC: Don't crash on 32 bit pthread_create 2026-04-04 23:48:43 +03:00
Bananymous 1d07d8e08e LibC/DynamicLoader: Add support for dynamically loaded TLS 
Previously I failed to dlopen if any of the objects contained TLS
section
 2026-03-17 20:01:51 +02:00
Bananymous 2961a49dc7 Kernel: Optimize futexes 
Add support for processor local futexes. These work the exact same way
as global ones, but only lock a process specific lock and use a process
specific hash map.

Also reduce the time futex lock is held. There was no need to hold the
global lock while validating addresses in the process' address space.
 2026-01-09 22:27:59 +02:00
Bananymous 89c0ff1a9d Kernel/LibC: Replace SYS_{GET,SET}_TLS with SYS_{SET,GET}_{FS,GS}BASE 
This allows userspace to use both registers
 2025-11-13 04:20:53 +02:00
Bananymous fb61cab70d LibC: Rewrite pthread_mutex using a futex 2025-08-21 02:52:49 +03:00
Bananymous eb7922ab88 LibC: Implement pthread_cond_* using a futex 2025-08-05 03:09:24 +03:00
Bananymous 658a001d91 LibC: Make pthread_barrier safe 
It used to deadlock and it was not safe if more threads than the target
were attempting to wait on it.
 2025-08-05 03:09:24 +03:00
Bananymous 57c9f5a8a8 LibC: lock mutex when pthread_cond_timedwait times out 2025-08-05 03:09:24 +03:00
Bananymous d25a5034db LibC: Update thread id on fork 2025-08-05 03:09:24 +03:00
Bananymous f197d39aaf LibC: Don't allow pthread_join to return EINTR 2025-08-05 03:09:24 +03:00
Bananymous 4a95343936 LibC: Make _get_uthread a macro 
This allows nice inlining :)
 2025-08-05 03:09:24 +03:00
Bananymous 4e705a91af LibC: Fix pthread keys 
I had misunderstood how these are supposed to work :D
 2025-08-05 03:09:24 +03:00
Bananymous 0f2c02fb04 LibC: Add stubs for pthread_{get,set}schedparam 2025-06-28 16:55:13 +03:00
Bananymous f9451915b9 LibC: Use pause in pthread spinlock locking 2025-06-16 15:07:58 +03:00
Bananymous 5ad7d7edb1 DynamicLoader: Fix TLS on 32 bit platform 
There were two problems with my previous implementation
- TLS was not allocated if nothing used it. There is a fallback
  initialization in _init_libc, but this was not enough if one of the
  init functions tried to access errno.
- __tls_get_addr was not resolved. If __tls_get_addr was called through
  a plt entry, everything would just break :(
 2025-06-06 16:27:07 +03:00
Bananymous df7f245cf8 LibC: Implement pthread_atfork 
Again this code is not tested but *feels* right :D
 2025-06-01 13:48:03 +03:00
Bananymous dbdefa0f4a LibC: Implement pthread cancelation 
This code is not tested at all but it looks correct xD
 2025-06-01 13:48:03 +03:00
Bananymous c957f1ddca LibC: Cleanup pthread code and add some pthread_attr functions 
errno, pthread cleanup and pthread id are now stored in uthread. This
allows using these without TLS
 2025-06-01 13:48:03 +03:00
Bananymous b774f147da LibC: Implement dummy pthread_attr_{get,set}detachstate 
detached threads are not yet supported, but this allows implementation
to make sure threads are joinable.
 2025-04-21 19:58:01 +03:00
Bananymous 2a5921b9c9 LibC: Implement pthread_barrier 
This is not fully working but should be fine for most cases
 2025-04-21 19:53:38 +03:00
Bananymous 60cb392e97 LibC: Implement pthread_barrier 
This is yet another bad sched_yield implementation :D
 2025-04-21 19:52:14 +03:00
Bananymous 1c88d0d7f7 LibC: Implement pthread_rwlock 
This uses the same dumb sched_yield instead of actually blocking :D
 2025-04-21 18:48:47 +03:00
Bananymous 5d8dd090a9 LibC: Implement pthread_once 2025-04-21 14:17:17 +03:00
Bananymous 265b4c2b22 LibC: Implement thread_equal 2025-04-20 03:27:16 +03:00
Bananymous db9db2cc40 LibC: Implement basic pthread mutexes 
This implementation is just calling sched_yield if it could not get
mutex. This is not optimal as it does not allow the CPU to idle, but it
works for now :)

Also I did not test this code at all, but it feels correct :D
 2025-04-20 03:27:16 +03:00
Bananymous 3642eabac0 LibC: Use BAN::atomic_* functions in pthread spinlock 
This allows us not to reinterpret_cast pthread_spin_t to
BAN::Atomic<pthread_spin_t> which is much better :)
 2025-04-20 03:11:41 +03:00
Bananymous 1ccff9478f LibC: Don't define __tls_get_addr if TLS is disabled 
This makes linking fail if something tries to use TLS :)
 2025-04-20 03:11:41 +03:00
Bananymous 85f9b585f5 LibC: Don't yield on pthread_spin_lock 
Thats kinda the whole point of spinlocks :D
 2025-04-20 03:11:41 +03:00
Bananymous 01626b4c9f LibC: Add stub for pthread_detach 2025-04-20 03:11:41 +03:00
Bananymous a85841ca76 LibC: Add stub for pthread_attr_setstacksize 2025-04-20 03:11:41 +03:00
Bananymous fe6c4cd0b5 LibC: Implement POSIX TLD area (pthread_key*) 2025-04-20 03:11:41 +03:00
Bananymous ac90800c3c Kernel/LibC/DynamicLoader: Implement thread local storage 
For some reason this does not work on 32 bit version, so it is disabled
on that platform. I'll have to look into it later to find the bug :)
 2025-04-15 23:33:39 +03:00
Bananymous 08f5833ca8 Kernel/LibC: Implement pthread_attr_init 2025-04-15 23:31:17 +03:00