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Rev Age Author Path Log message Diff
2712 5987 d 10 h decky /trunk/kernel/ prettyprint output  
2632 6048 d 23 h decky /trunk/kernel/generic/src/proc/ try to kill the tasks fewer times by introducing a delay in iterations  
2504 6174 d 5 h jermar /trunk/kernel/generic/ Give the AVL tree walkers the possibility to take an argument.
Each walker is now supposed to return a bool value to support walk termination.

Switch over from the tasks_btree B+tree to tasks_tree AVL tree.
This makes the fix for ticket #48 complete.		  
2446 6232 d 9 h jermar /trunk/kernel/generic/ More efficient and simpler task termination.

Based on the assumption, that after its creation, only the task itself can create more threads for itself,
the last thread with userspace context to execute thread_exit() will perform futex and IPC cleanup. When
the task has no threads, it is destroyed. Both the cleanup and destruction is controlled by reference
counting.

As for userspace threads, even though there could be a global garbage collector for joining threads, it is
much simpler if the uinit thread detaches itself before switching to userspace.

task_kill() is now an idempotent operation. It just instructs the threads within a task to exit.

Change in the name of a thread state: Undead -> JoinMe.		  
2436 6234 d 5 h jermar /trunk/ Fix two memory leaks.

In kernel, kernel_uarg structure needs to be deallocated when a thread
with userspace context is destroyed.

In userspace, the return value of the SYS_THREAD_CREATE must be checked
for error conditions and in case of error, uarg and stack must be freed
up.		  
2227 6285 d 18 h decky /trunk/kernel/ start shutdown infrastructure  
2216 6287 d 4 h decky /trunk/ make thread ID 64 bit (task ID is 64 bit already)
cleanup thread syscalls		  
2183 6289 d 8 h jermar /trunk/kernel/generic/ Continue to de-oversynchronize the kernel.
- replace as->refcount with an atomic counter; accesses to this
reference counter are not to be done when the as->lock mutex is held;
this gets us rid of mutex_lock_active();

Remove the possibility of a deadlock between TLB shootdown and asidlock.
- get rid of mutex_lock_active() on as->lock
- when locking the asidlock spinlock, always do it conditionally and with
preemption disabled; in the unsuccessful case, enable interrupts and try again
- there should be no deadlock between TLB shootdown and the as->lock mutexes
- PLEASE REVIEW !!!

Add DEADLOCK_PROBE's to places where we have spinlock_trylock() loops.		  
2118 6348 d 9 h decky /trunk/kernel/generic/src/ explicit typecast, fix signed/unsigned comparison  
2109 6349 d 13 h jermar /trunk/kernel/generic/ Revert thread_interrupt_sleep() to waitq_interrupt_sleep().
I'd prefer that this, IMO, waitq related stuff stays together.		  
2089 6356 d 11 h decky /trunk/ huge type system cleanup
remove cyclical type dependencies across multiple header files
many minor coding style fixes		  
2087 6357 d 7 h jermar /trunk/kernel/ Indentaion and formatting changes even Martin will like :-)  
2071 6367 d 4 h jermar /trunk/ (c) versus (C)  
2050 6396 d 14 h decky /trunk/kernel/ benchmarking with statistics (initial)  
2048 6399 d 5 h jermar /trunk/ Formatting and indentation changes.  
2042 6401 d 8 h decky /trunk/kernel/ introduce uncounted threads, whose accounting doesn't affect accumulated task accounting
run tests in kconsole thread again		  
2041 6401 d 9 h decky /trunk/kernel/generic/src/proc/ revert 2040  
2040 6401 d 11 h decky /trunk/kernel/generic/src/proc/ add forgotten btree_remove()  
2039 6401 d 12 h decky /trunk/kernel/generic/ accumulate task accounting, run tests as separate kernel task  
2035 6402 d 9 h decky /trunk/kernel/generic/src/ more fancy kconsole output  
2000 6417 d 13 h decky /trunk/kernel/ move files to more proper locations  
1880 6496 d 3 h jermar /trunk/ Small improvements here and there.  
1864 6503 d 1 h jermar /trunk/ sparc64 update.
- Prototype userspace layer implementation that
at least relates to sparc64 and compiles cleanly.
- Fixes for kernel's preemptible_handler and code
related to running userspace.
- Enable userspace. Several dozen instructions
are now run in userspace! We are pretty near
the userspace milestone for sparc64.		  
1839 6532 d 8 h decky /trunk/kernel/generic/ finish security context isolation  
1820 6540 d 1 h decky /trunk/kernel/generic/ initial security context support  
1787 6557 d 6 h decky / move kernel/trunk, uspace/trunk and boot/trunk to trunk/kernel, trunk/uspace and trunk/boot  
1780 6564 d 7 h jermar /kernel/trunk/ Replace old __u?? types with respective C99 variants (e.g. uint32_t, int64_t, uintptr_t etc.).  
1757 6578 d 12 h jermar /kernel/trunk/ Cleanup of comments.  
1735 6580 d 13 h decky /kernel/trunk/ make kernel prints case consistent  
1702 6585 d 10 h cejka /kernel/trunk/ Kernel doxygen comments updated.  
1687 6588 d 11 h jermar /kernel/trunk/generic/src/proc/ Fix double thread_join() in ktaskgc.
In thread_create(), lock TASK with interrupts disabled again.
thread_join_timeout() can use ordinary waitq_sleep_timeout().		  
1684 6588 d 14 h jermar /kernel/trunk/ #ifdef more debugging printf()'s.  
1676 6589 d 11 h jermar /kernel/trunk/generic/src/proc/ Forgotten interrupts_restore().  
1661 6590 d 15 h jermar /kernel/trunk/generic/ Collect Undead threads while waiting to join uinit.
Rename ktaskkill to ktaskgc.		  
1636 6592 d 0 h jermar /kernel/trunk/ Move comment.

Do TLB shootdown also when allocating new ASID.		  
1600 6592 d 15 h jermar /kernel/trunk/generic/src/proc/ Prevent task killing of kernel by returning EPERM on such a request.  
1597 6592 d 16 h palkovsky /kernel/trunk/ Added possibility to interrupt task at exit from interrupt routine.  
1589 6593 d 6 h jermar /kernel/trunk/generic/src/ Improve comments regarding liveliness of threads and tasks.  
1588 6593 d 6 h jermar /kernel/trunk/generic/src/ In task_kill(), remove the task from the tasks_btree before proceeding.
Thus, when the kernel finds the task in the tasks_btree and locks it before
releasing tasks_lock, it is guaranteed that the task will not be destroyed
until the lock is held. If the kernel needs to unlock the task, do some operation
and lock it again, it should increase its refcount before doing so. In that case,
when releasing the lock, it must decrement the refcount and if it reaches
zero, it must call task_destroy().		  
1587 6593 d 7 h jermar /kernel/trunk/ task_destroy() implementation, fixes in as_destroy() and task_kill().
This is the first version of HelenOS that would perform complete cleanup leading from thread to destruction of address space.