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2436 6210 d 10 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 6262 d 0 h decky /trunk/kernel/ start shutdown infrastructure  
2216 6263 d 10 h decky /trunk/ make thread ID 64 bit (task ID is 64 bit already)
cleanup thread syscalls		  
2183 6265 d 14 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 6324 d 15 h decky /trunk/kernel/generic/src/ explicit typecast, fix signed/unsigned comparison  
2109 6325 d 18 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 6332 d 16 h decky /trunk/ huge type system cleanup
remove cyclical type dependencies across multiple header files
many minor coding style fixes		  
2087 6333 d 12 h jermar /trunk/kernel/ Indentaion and formatting changes even Martin will like :-)  
2071 6343 d 9 h jermar /trunk/ (c) versus (C)  
2050 6372 d 20 h decky /trunk/kernel/ benchmarking with statistics (initial)  
2048 6375 d 11 h jermar /trunk/ Formatting and indentation changes.  
2042 6377 d 13 h decky /trunk/kernel/ introduce uncounted threads, whose accounting doesn't affect accumulated task accounting
run tests in kconsole thread again		  
2041 6377 d 14 h decky /trunk/kernel/generic/src/proc/ revert 2040  
2040 6377 d 16 h decky /trunk/kernel/generic/src/proc/ add forgotten btree_remove()  
2039 6377 d 17 h decky /trunk/kernel/generic/ accumulate task accounting, run tests as separate kernel task  
2035 6378 d 15 h decky /trunk/kernel/generic/src/ more fancy kconsole output  
2000 6393 d 19 h decky /trunk/kernel/ move files to more proper locations  
1880 6472 d 8 h jermar /trunk/ Small improvements here and there.  
1864 6479 d 6 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 6508 d 14 h decky /trunk/kernel/generic/ finish security context isolation  
1820 6516 d 6 h decky /trunk/kernel/generic/ initial security context support  
1787 6533 d 11 h decky / move kernel/trunk, uspace/trunk and boot/trunk to trunk/kernel, trunk/uspace and trunk/boot  
1780 6540 d 12 h jermar /kernel/trunk/ Replace old __u?? types with respective C99 variants (e.g. uint32_t, int64_t, uintptr_t etc.).  
1757 6554 d 17 h jermar /kernel/trunk/ Cleanup of comments.  
1735 6556 d 19 h decky /kernel/trunk/ make kernel prints case consistent  
1702 6561 d 15 h cejka /kernel/trunk/ Kernel doxygen comments updated.  
1687 6564 d 16 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 6564 d 19 h jermar /kernel/trunk/ #ifdef more debugging printf()'s.  
1676 6565 d 16 h jermar /kernel/trunk/generic/src/proc/ Forgotten interrupts_restore().  
1661 6566 d 21 h jermar /kernel/trunk/generic/ Collect Undead threads while waiting to join uinit.
Rename ktaskkill to ktaskgc.		  
1636 6568 d 5 h jermar /kernel/trunk/ Move comment.

Do TLB shootdown also when allocating new ASID.		  
1600 6568 d 21 h jermar /kernel/trunk/generic/src/proc/ Prevent task killing of kernel by returning EPERM on such a request.  
1597 6568 d 21 h palkovsky /kernel/trunk/ Added possibility to interrupt task at exit from interrupt routine.  
1589 6569 d 11 h jermar /kernel/trunk/generic/src/ Improve comments regarding liveliness of threads and tasks.  
1588 6569 d 12 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 6569 d 12 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.		  
1585 6569 d 16 h jermar /kernel/trunk/generic/ Kill task when its main thread exits.  
1583 6569 d 19 h jermar /kernel/trunk/generic/ Make ktaskclnp call ipc_cleanup and futex_cleanup.  
1580 6569 d 22 h jermar /kernel/trunk/generic/src/ Update for task_kill().  
1579 6570 d 8 h jermar /kernel/trunk/generic/ Framework for task_kill().
Some pieces (e.g. implementation of ktask_cleanup() kernel thread and
task_destroy() function) are missing.
Changed locking order for task lock, threads_lock and thread lock from
threads_lock, thread lock, task lock to task lock, threads_lock, thread lock.