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Rev Age Author Path Log message Diff
3026 5915 d 23 h svoboda /branches/tracing/kernel/generic/ Convert THREAD->udebug.lock to mutex. Protect against udebug_before_thread_runs() called from interrupt handler. Pending locking scheme change (multithreaded tasks may hang)  
3018 5917 d 20 h svoboda /branches/tracing/ Isolate udebug-related thread_t fields into udebug_thread_t  
3014 5918 d 4 h svoboda /branches/tracing/kernel/generic/ Isolate udebug-related task_t fields into udebug_task_t.  
2925 5931 d 4 h svoboda /branches/tracing/ Merged latest trunk changes to tracing branch  
2903 5934 d 3 h svoboda /branches/tracing/ Rename event NEW_THREAD to THREAD_B. Add THREAD_E event - thread exit  
2902 5934 d 4 h svoboda /branches/tracing/kernel/generic/ Implement proper kbox thread shutdown, with all bells and whistles. Use THREAD->debug_active in udebug_stoppable_xx() and friends  
2899 5934 d 17 h svoboda /branches/tracing/ Add support for SET_EVMASK debug operation  
2898 5934 d 18 h svoboda /branches/tracing/ Implement operation UDEBUG_M_STOP that stops a thread. Can be used for stopping program by hitting a key in debugger. Somewhat jittery demo in sctrace. Fix missing lock of THREAD->debug_lock in udebug_stoppable_end()  
2867 5943 d 21 h svoboda /branches/tracing/ Signal hash of new thread with a UDEBUG_EVENT_NEW_THREAD message  
2866 5944 d 2 h svoboda /branches/tracing/kernel/generic/ Verify that thread is waiting in syscall event when reading syscall args  
2865 5944 d 3 h svoboda /branches/tracing/kernel/generic/src/ Put proper udebug_stoppable_end() in uinit  
2854 5962 d 4 h svoboda /branches/tracing/ Fix condition for generating debug events. Properly initialize threads created during debugging session  
2848 5963 d 1 h svoboda /branches/tracing/kernel/generic/ Use debug_lock in thread struct for finer locking, to avoid problems with waitq_wakeup  
2839 5963 d 19 h svoboda /branches/tracing/kernel/generic/ Add thread_attach_by_id() and use it to do ipc_connect_kbox() with proper locking  
2827 5968 d 2 h svoboda /branches/tracing/kernel/generic/ Verify that a thread/task is in appropriate state when handling debug calls  
2826 5968 d 3 h svoboda /branches/tracing/kernel/generic/ Move debug_go_call from task struct to thread struct  
2825 5968 d 3 h svoboda /branches/tracing/kernel/generic/ Introduce task debug-states (udebug_task_state_t)  
2817 5968 d 18 h svoboda /branches/tracing/kernel/generic/ Add REGS_READ and REGS_WRITE debug methods to access userspace register state (no effect yet)  
2808 5969 d 17 h svoboda /branches/tracing/ add kernel answerbox+thread to mediate access to task's memory  
2804 5970 d 23 h svoboda /branches/tracing/kernel/generic/ allow for attaching to tasks with sleeping threads  
2803 5971 d 0 h svoboda /branches/tracing/kernel/generic/src/proc/ fix: initialize debug fields in task structure  
2801 5971 d 3 h svoboda /branches/tracing/ [tracing] initial debug interface support  
2800 5971 d 4 h svoboda /branches/tracing/kernel/generic/ [tracing] fix initialiation of answerbox->task in ipc_answerbox_init  
2799 5971 d 5 h svoboda /branches/tracing/ Revert all changes in tracing branch (sync to r2785 of trunk)  
2787 5979 d 21 h decky /branches/tracing/ add dynamic linking, debugging and tracing branch  
2765 5997 d 17 h jermar /trunk/kernel/generic/src/proc/ tasklet.c needs to include config.h  
2746 6008 d 20 h decky /trunk/kernel/ start merging tasklets (more or less a rewrite)  
2745 6009 d 1 h decky /trunk/ code cleanup (mostly signed/unsigned)
allow extra compiler warnings
 
2712 6034 d 23 h decky /trunk/kernel/ prettyprint output  
2632 6096 d 12 h decky /trunk/kernel/generic/src/proc/ try to kill the tasks fewer times by introducing a delay in iterations  
2504 6221 d 18 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.
 
2502 6221 d 23 h jermar /trunk/kernel/generic/ Replace the threads_btree B+tree with an AVL tree. The new variable is called
threads_tree. For printing list of threads, use the new AVL tree walker
mechanism.

This solves half of ticket #48.
 
2487 6248 d 19 h jermar /trunk/kernel/generic/src/proc/ Kernel stack address was printed twice.  
2470 6267 d 16 h jermar /trunk/ Fix a double-free recently introduced in revision r2436.
Add a comment clarifying the life-cycle of the kernel_uarg structure.

Comment out the freeing of userspace thread stack while still running on it.
This should be fixed by implementing userspace version of thread_join().
 
2451 6276 d 17 h jermar /trunk/kernel/generic/ JoinMe -> Lingering  
2446 6279 d 21 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.
 
2440 6280 d 16 h jermar /trunk/kernel/generic/ Fix the problem with sys_thread_create() by splitting the create and attach functionality of
thread_create(). Now it is possible to specify a flag that will cause thread_create() to only allocate and
initialize the thread structure. A call to thread_attach() will make the thread visible to the system.
This arrangement makes it easier to undo creation of a thread in case of a failure in sys_thread_create().
 
2436 6281 d 17 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.
 
2310 6304 d 18 h jermar /trunk/kernel/generic/ Cleanup the waitq_wakeup() interface.
Replace numeric constants (i.e. 0)
and boolean constants (i.e. false) with
more readable WAKEUP_FIRST. Also change the
type of the second argument of waitq_wakeup()
to a newly introduced type wakeup_mode_t.

Fix behaviour of waitq_wakeup() in case
that WAKEUP_ALL semantics is required
but no threads are sleeping in the wait
queue. This is a similar fix to that of
Jan Hudecek committed in the RCU branch,
but, IMHO, is more straightforward and
also doesn't eat up previous missed
wakeups.
 
2285 6317 d 2 h jermar /trunk/kernel/generic/src/proc/ Formatting and indentation fixes.