[lttng-dev] call trace while using lttng in petalinux 2019.2 (kernel 4.19)

[GOLLAMUDI MADHAN MOHAN]

Dear Sir/Madam,
                           I am Madhan , working as an embedded engineer in
5GTB. I am using lttng in petalinux 2019.2(kernel 4.19) .And getting a call
Trace error. Refer the below log for more details.


root at xilinx-zcu111-2019_2:~# lttng create
Spawning a session daemon
[  163.902282] lttng_kretprobes: loading out-of-tree module taints kernel.
[  163.987461] Unable to handle kernel paging request at virtual address
00000000000010c0
[  163.995379] Mem abort info:
[  163.998179]   ESR = 0x96000005
[  164.001233]   Exception class = DABT (current EL), IL = 32 bits
[  164.007149]   SET = 0, FnV = 0
[  164.010203]   EA = 0, S1PTW = 0
[  164.013333] Data abort info:
[  164.016218]   ISV = 0, ISS = 0x00000005
[  164.020054]   CM = 0, WnR = 0
[  164.023028] user pgtable: 4k pages, 39-bit VAs, pgdp = 00000000df6dd54e
[  164.029646] [00000000000010c0] pgd=0000000000000000, pud=0000000000000000
[  164.036447] Internal error: Oops: 96000005 [#1] SMP
[  164.041318] Modules linked in: lttng_tracer(O+) lttng_statedump(O)
lttng_ftrace(O) lttng_kprobes(O) lttng_clock(O) lttng_lib_ring_buffer(O)
lttng_kretprobes(O) uio_pdrv_genirq
[  164.056963] CPU: 1 PID: 4955 Comm: modprobe Tainted: G           O
 4.19.0-xilinx-v2019.2 #1
[  164.065734] Hardware name: ZynqMP ZCU111 RevA (DT)
[  164.070510] pstate: 60000005 (nZCv daif -PAN -UAO)
[  164.075429] pc : lttng_tracepoint_notify+0x188/0x228 [lttng_tracer]
[  164.081767] lr : lttng_tracepoint_notify+0x14c/0x228 [lttng_tracer]
[  164.088016] sp : ffffff8011613a40
[  164.091314] x29: ffffff8011613a40 x28: ffffff801163f000
[  164.096618] x27: 0000000000000100 x26: ffffff800813c958
[  164.101921] x25: ffffff8000e22758 x24: 0000000000000000
[  164.107225] x23: 00000000000010c0 x22: ffffff8000e42ed8
[  164.112528] x21: ffffffc87accc400 x20: ffffff8000e42ef8
[  164.117832] x19: 0000000000000001 x18: 0000000000000000
[  164.123135] x17: 0000000000000000 x16: 0000000000000000
[  164.128439] x15: ffffffffffffffff x14: 0000000000000000
[  164.133742] x13: 0000000000000000 x12: 0000000000000000
[  164.139046] x11: 0000000000000001 x10: 0101010101010101
[  164.144349] x9 : 6d64686b625e6f38 x8 : 706d75645f6c6f63
[  164.149653] x7 : 6f746f72705f7039 x6 : ffffffc8778d5ec1
[  164.154957] x5 : ffffff8009458000 x4 : 0000000000000000
[  164.160260] x3 : ffffff8000db77a0 x2 : ffffffc87828a380
[  164.165563] x1 : 0000000000000007 x0 : ffffff8000d13048
[  164.170869] Process modprobe (pid: 4955, stack limit =
0x00000000e6162018)
[  164.177725] Call trace:
[  164.180235]  lttng_tracepoint_notify+0x188/0x228 [lttng_tracer]
[  164.186148]  register_tracepoint_module_notifier+0x6c/0x98
[  164.191709]  lttng_tracepoint_init+0x54/0xc80 [lttng_tracer]
[  164.197438]  lttng_events_init+0x4c/0x1e0 [lttng_tracer]
[  164.202734]  do_one_initcall+0x68/0x1ec
[  164.206562]  do_init_module+0x60/0x1f0
[  164.210302]  load_module+0x1ca0/0x2270
[  164.214035]  __se_sys_finit_module+0xc0/0xd0
[  164.218288]  __arm64_sys_finit_module+0x24/0x30
[  164.222802]  el0_svc_common+0x98/0x100
[  164.226543]  el0_svc_handler+0x74/0x90
[  164.230275]  el0_svc+0x8/0xc
[  164.233142] Code: 6b18003f 54fffc49 f9415c00 b8b8d817 (f94002f3)
[  164.239226] ---[ end trace c1cc2d1f9d55794a ]---
[  195.613567] lttng_ring_buffer_client_overwrite: gave up waiting for init
of module lttng_tracer.
[  195.622371] lttng_ring_buffer_client_overwrite: Unknown symbol
lttng_transport_unregister (err -16)
^C
root at xilinx-zcu111-2019_2:~# uname -a
Linux xilinx-zcu111-2019_2 4.19.0-xilinx-v2019.2 #1 SMP Mon Mar 14 15:09:26
UTC 2022 aarch64 GNU/Linux
root at xilinx-zcu111-2019_2:~# uname -a
Linux xilinx-zcu111-2019_2 4.19.0-xilinx-v2019.2 #1 SMP Mon Mar 14 15:09:26
UTC 2022 aarch64 GNU/Linux
root at xilinx-zcu111-2019_2:~# [  226.333565]
lttng_ring_buffer_client_overwrite: gave up waiting for init of module
lttng_tracer.
[  226.342368] lttng_ring_buffer_client_overwrite: Unknown symbol
lttng_last_tsc (err -16)
[  257.053564] lttng_ring_buffer_client_overwrite: gave up waiting for init
of module lttng_tracer.
[  257.062358] lttng_ring_buffer_client_overwrite: Unknown symbol
lttng_transport_register (err -16)
[  287.773562] lttng_ring_buffer_client_overwrite: gave up waiting for init
of module lttng_tracer.
[  287.782356] lttng_ring_buffer_client_overwrite: Unknown symbol
lttng_transport_unregister (err -16)
[  318.493567] lttng_ring_buffer_client_overwrite: gave up waiting for init
of module lttng_tracer.
[  318.502364] lttng_ring_buffer_client_overwrite: Unknown symbol
lttng_last_tsc (err -16)
[  349.213564] lttng_ring_buffer_client_overwrite: gave up waiting for init
of module lttng_tracer.
[  349.222363] lttng_ring_buffer_client_overwrite: Unknown symbol
lttng_transport_register (err -16)


Thank You
with regards
G Madhan Mohan

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