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Rev Age Author Path Log message Diff
3597 5665 d 11 h svoboda /branches/tracing/ Merge latest trunk changes into tracing.  
3431 5730 d 12 h svoboda /branches/tracing/kernel/ Add configuration option CONFIG_UDEBUG to compile udebug in the kernel or not.  
3426 5730 d 23 h svoboda /branches/tracing/kernel/generic/src/ Fix compile errors.  
3425 5730 d 23 h svoboda /branches/tracing/ Merge latest trunk changes into tracing (broken)  
3424 5731 d 11 h svoboda /branches/tracing/ Merge trunk changes up to r3180 into tracing  
3034 5838 d 23 h svoboda /branches/tracing/kernel/generic/ Convert kb_cleanup_lock to a mutex  
3026 5839 d 19 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 5841 d 16 h svoboda /branches/tracing/ Isolate udebug-related thread_t fields into udebug_thread_t  
2925 5855 d 0 h svoboda /branches/tracing/ Merged latest trunk changes to tracing branch  
2903 5857 d 22 h svoboda /branches/tracing/ Rename event NEW_THREAD to THREAD_B. Add THREAD_E event - thread exit  
2902 5857 d 23 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  
2898 5858 d 14 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 5867 d 17 h svoboda /branches/tracing/ Signal hash of new thread with a UDEBUG_EVENT_NEW_THREAD message  
2866 5867 d 22 h svoboda /branches/tracing/kernel/generic/ Verify that thread is waiting in syscall event when reading syscall args  
2865 5867 d 23 h svoboda /branches/tracing/kernel/generic/src/ Put proper udebug_stoppable_end() in uinit  
2854 5886 d 0 h svoboda /branches/tracing/ Fix condition for generating debug events. Properly initialize threads created during debugging session  
2848 5886 d 21 h svoboda /branches/tracing/kernel/generic/ Use debug_lock in thread struct for finer locking, to avoid problems with waitq_wakeup  
2839 5887 d 15 h svoboda /branches/tracing/kernel/generic/ Add thread_attach_by_id() and use it to do ipc_connect_kbox() with proper locking  
2827 5891 d 21 h svoboda /branches/tracing/kernel/generic/ Verify that a thread/task is in appropriate state when handling debug calls  
2826 5891 d 23 h svoboda /branches/tracing/kernel/generic/ Move debug_go_call from task struct to thread struct  
2825 5891 d 23 h svoboda /branches/tracing/kernel/generic/ Introduce task debug-states (udebug_task_state_t)  
2817 5892 d 14 h svoboda /branches/tracing/kernel/generic/ Add REGS_READ and REGS_WRITE debug methods to access userspace register state (no effect yet)  
2808 5893 d 13 h svoboda /branches/tracing/ add kernel answerbox+thread to mediate access to task's memory  
2804 5894 d 19 h svoboda /branches/tracing/kernel/generic/ allow for attaching to tasks with sleeping threads  
2801 5894 d 23 h svoboda /branches/tracing/ [tracing] initial debug interface support  
2799 5895 d 0 h svoboda /branches/tracing/ Revert all changes in tracing branch (sync to r2785 of trunk)  
2787 5903 d 17 h decky /branches/tracing/ add dynamic linking, debugging and tracing branch  
2712 5958 d 19 h decky /trunk/kernel/ prettyprint output  
2504 6145 d 14 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 6145 d 19 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 6172 d 14 h jermar /trunk/kernel/generic/src/proc/ Kernel stack address was printed twice.  
2470 6191 d 11 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 6200 d 13 h jermar /trunk/kernel/generic/ JoinMe -> Lingering  
2446 6203 d 17 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 6204 d 12 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 6205 d 13 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.
 
2268 6247 d 14 h jermar /trunk/kernel/generic/ Document and assert proper usage of THREAD_FLAG_WIRED.
Original patch by Jan Hudecek.
 
2229 6256 d 19 h jermar /trunk/ Revert some of the changes introduced in revision 2209.
I think it is not correct to remove serialization of pseudo threads in printf_core.c.
With thread-level futex serialization, several pseudo threads running in one thread could easily deadlock
the task.

Add a dedicated futex serialization to thread1.c test only.
 
2216 6258 d 13 h decky /trunk/ make thread ID 64 bit (task ID is 64 bit already)
cleanup thread syscalls
 
2187 6259 d 20 h decky /trunk/kernel/generic/ add syscall for getting current thread ID