async memory usage

[davidqge]

run_rmk cause stack protection fault on esp32c6 with 100kb stack.

This article talks about wrapper async function's memory usage [rebinding values in an async function can double the memory usage
#96084](rust-lang/rust#96084)

0.959410 INFO Advertising..
    Guru Meditation Error: Core  0 panic'ed (Stack protection fault).
    
    Detected in task "main" at 0x4080c1be
    0x4080c1be - xQueueSemaphoreTake
        at /home/embedded/rmk/examples/use_rust/esp32c6_ble/.embuild/espressif/esp-idf/v5.2.2/components/freertos/FreeRTOS-Kernel/queue.c:1699
    Stack pointer: 0x40818f20
    Stack bounds: 0x40818f4c - 0x408317e0
    
    
    Core  0 register dump:
    MEPC    : 0x4080da26  RA      : 0x4080c1d4  SP      : 0x40818f20  GP      : 0x40812040
    0x4080da26 - xTaskGetSchedulerState
        at /home/embedded/rmk/examples/use_rust/esp32c6_ble/.embuild/espressif/esp-idf/v5.2.2/components/freertos/FreeRTOS-Kernel/tasks.c:4972
    0x4080c1d4 - xQueueSemaphoreTake
        at /home/embedded/rmk/examples/use_rust/esp32c6_ble/.embuild/espressif/esp-idf/v5.2.2/components/freertos/FreeRTOS-Kernel/queue.c:1718
    0x40812040 - coex_schm_ble_mesh_standby_bt_a2dp_paused_wifi_connecting
        at ??:??
    TP      : 0x408053b0  T0      : 0x40028140  T1      : 0xffffffe0  T2      : 0xffffffff
    0x408053b0 - r_ble_lll_sched_insertion_begin
        at ??:??
    S0/FP   : 0x408179bc  S1      : 0xffffffff  A0      : 0x408179bc  A1      : 0xffffffff
    A2      : 0x00000004  A3      : 0x00000000  A4      : 0x00000001  A5      : 0x00000001
    A6      : 0x00000000  A7      : 0x00000000  S2      : 0x00000000  S3      : 0xffffffff
    S4      : 0x40831848  S5      : 0x40820768  S6      : 0x40820768  S7      : 0x40823e58
    S8      : 0x40819800  S9      : 0x40820768  S10     : 0x420aceaf  S11     : 0x0000000c
    T3      : 0x00000001  T4      : 0x00000000  T5      : 0x0000003e  T6      : 0x40803e80
    0x40803e80 - npl_freertos_time_delay
        at /home/embedded/rmk/examples/use_rust/esp32c6_ble/.embuild/espressif/esp-idf/v5.2.2/components/bt/porting/npl/freertos/src/npl_os_freertos.c:997
    MSTATUS : 0x00001881  MTVEC   : 0x40800001  MCAUSE  : 0x0000001b  MTVAL   : 0x408167b7
    0x40800001 - _vector_table
        at ??:??
    0x408167b7 - ble_store_config_our_secs
        at ??:??
    MHARTID : 0x00000000

[HaoboGu]

The issue says "This seems to only happen if the value was borrowed earlier". I suspect the cause is not the async run_rmk.

[HaoboGu]

I did some improvements for run_rmk: #76

[davidqge]

Still happens,

I committed the larger kinesis keymap, see if you can reproduce it.

My fix, alias esp function can run within 64kb stack.

[HaoboGu]

this is quite strange🤔, I will take a look later

[HaoboGu]

I checked stack size using -Zemit-stack-sizes on nrf52840 example, using run_rmk and initialize_nrf_ble_keyboard_with_config_and_run emits same stack size. I suspect it's related only to esp32. (I was not able to get stack size for esp :(