Backtrace of suspended task

[arbrauns]

Is it possible to get a backtrace of a suspended task, i.e. find out where the task is blocked/where it was interrupted? gdb does not give any useful information here:

(gdb) info threads
  Id   Target Id                                       Frame
  2    Thread 537022208 (idle UNKNOWN PRIO 15)         arch_cpu_idle () at $PRJPATH/zephyr/arch/arm/core/aarch32/cpu_idle.S:106
  3    Thread 537022496 (main SUSPENDED PRIO 0)        0x08020094 in arch_irq_unlock (key=0) at $PRJPATH/zephyr/include/zephyr/arch/arm/aarch32/asm_inline_gcc.h:96
  4    Thread 537018272 (logging PENDING PRIO 14)      0x08020094 in arch_irq_unlock (key=0) at $PRJPATH/zephyr/include/zephyr/arch/arm/aarch32/asm_inline_gcc.h:96
[...]
* 12   Thread 537009816 (ADC RUNNING PRIO 5)           adc_stm32_channel_setup (dev=0x80564a8 <__device_dts_ord_18>, channel_cfg=0x20021058 <stm32_temp_dev_data_0+4>) at $PRJPATH/zephyr/drivers/adc/adc_stm32.c:1075

Selecting a thread and printing its backtrace isn't any more help either, it just shows context switching internals:

(gdb) thread 3
[Switching to thread 3 (Thread 537022496)]
#0  0x08020094 in arch_irq_unlock (key=0) at $PRJPATH/zephyr/include/zephyr/arch/arm/aarch32/asm_inline_gcc.h:96
96		__asm__ volatile(
(gdb) backtrace full
#0  0x08020094 in arch_irq_unlock (key=0) at $PRJPATH/zephyr/include/zephyr/arch/arm/aarch32/asm_inline_gcc.h:96
No locals.
#1  arch_swap (key=0) at $PRJPATH/zephyr/arch/arm/core/aarch32/swap.c:44
No locals.
#2  0x08054bb8 in z_swap_irqlock (key=<optimized out>) at $PRJPATH/zephyr/kernel/include/kswap.h:185
        ret = <optimized out>
#3  z_reschedule_irqlock (key=<optimized out>) at $PRJPATH/zephyr/kernel/sched.c:963
No locals.
#4  0x00000000 in ?? ()
No symbol table info available.

[arbrauns]

Bumping this in the hopes that it will get seen by someone who knows - is there a better way to do this than to post a useless comment?