Bananymous/banan-os
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60 Commits
Author SHA1 Message Date
Bananymous 64523b6c70 LibC: Fix futex return value handling 2026-07-20 06:58:30 +03:00
Bananymous bc622c8b51 LibC: Fix pthread default guard size and name 2026-07-20 06:58:30 +03:00
Bananymous 46e2d665e9 LibC: Make pthread_once block with a futex instead of yielding 2026-07-20 04:07:23 +03:00
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