Hello All,
I'm currently debugging my xnu based kernel module and I'm using the
API of kernel.py
from the KDK.
I need some advice about how to print the backtraces of all kernel space
threads or all kernel space threads per task.
Here's what I've done so far :
1. getting kernel_task id
(lldb) showalltasks
task vm_map ipc_space #acts flags
pid process io_policy wq_state command
0xffffff800d828550 0xffffff800a1038d8 0xffffff800d5d17c0 140
0 0xffffff8007abb460 -1 -1 -1 kernel_task
2. dump all threads which belongs to kernel_task
(lldb) showtaskthreads 0xffffff800d828550
task vm_map ipc_space #acts flags
pid process io_policy wq_state command
0xffffff800d828550 0xffffff800a1038d8 0xffffff800d5d17c0 140
0 0xffffff8007abb460 -1 -1 -1 kernel_task
thread thread_id processor base pri
sched_mode io_policy state ast waitq
wait_event wmesg thread_name
0xffffff8007acf098 0x65 0xffffff8007a8a7b8 92 92
fixed bound WU L 0xffffff804119e550
0xffffff8007a87a30 <vm_page_free_wanted>
0xffffff800d83f4c0 0x66 0xffffff8007a8a7b8 0 0
fixed bound RI L
0xffffff800d83f958 0x67 0xffffff8041ad6000 95 95
fixed WU L 0xffffff804119c240
0xffffff8007303840 <sched_timeshare_maintenance_continue>
sched_maintenance_thread
0xffffff800d83fdf0 0x68 0xffffff8041ad6000 80 80
fixed WU L 0xffffff804119e850
0xffffff8007acf9f0
0xffffff800d83f028 0x69 0xffffff8007a8a7b8 93 93
fixed WU 0xffffff804119e5e0
0xffffff8007acfa08
0xffffff800d83eb90 0x6a 0xffffff8041ad6000 80 80
fixed WU 0xffffff80411a07a0
0xffffff8007acf9c8
Now I've got record for each thread in the kernel_task along with info such
as thread id, but not the backtrace ...
is there any command in the KDK which can retrieve the backtrace for all
the threads per task or any single thread ?
Thanks ,
Zohar
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