multicore_lockout_start_blocking assertion failure v1.4.0 and v1.4.1

[RaresAil]

Similar with an old closed issue: #687

EDIT: Workaround found (check the bottom)

assertion "us_since_boot <= INT64_MAX" failed: file

Version of SKD:

• I tried Master with SDK 1.4.0
• And Develop with 1.4.1

The repo where I have the code is here, is a pretty complex one

• core 0 is handling wifi and tcp socket server
• core 1 is handling some service specific data, in the case where I tried the functions is for an adjustable desk

Repo: https://github.com/RaresAil/pico-w-template/tree/feat/flash-saving-data

Called from the main thread of core 1:

void save_flash_data() {
  uint8_t* bytes = (uint8_t*) &flash_data;
  int data_size = sizeof(flash_data);

  printf("[Flash] Programming flash (Size: %d)\n", data_size);

  printf("[Flash] Requesting core 0 to pause\n");
  multicore_lockout_start_blocking(); // ERROR HERE
  printf("[Flash] Locking core 1\n");

  uint32_t interrupts = save_and_disable_interrupts();
  flash_range_erase(FLASH_TARGET_OFFSET, FLASH_SECTOR_SIZE);
  flash_range_program(FLASH_TARGET_OFFSET, bytes, FLASH_PAGE_SIZE);
  restore_interrupts(interrupts);

  printf("[Flash] Unlocking core 1\n");
  multicore_lockout_end_blocking();
  printf("[Flash] Releasing core 0\n");
  printf("[Flash] Done.\n");
}

At the beginning of core 0 in main

  multicore_launch_core1(core1_entry);
  multicore_lockout_victim_init();

Workaround

Instead of using multicore_lockout_end_blocking and multicore_lockout_start_blocking i managed to get it working by using the timeout version of them:

// 10 years in microseconds
#define MULTICORE_LOCKOUT_TIMEOUT (uint64_t)10 * 365 * 24 * 60 * 60 * 1000 * 1000


const bool locked = multicore_lockout_start_timeout_us(MULTICORE_LOCKOUT_TIMEOUT);

if (locked) {
  uint32_t interrupts = save_and_disable_interrupts();
  flash_range_erase(FLASH_TARGET_OFFSET, FLASH_SECTOR_SIZE);
  flash_range_program(FLASH_TARGET_OFFSET, bytes, FLASH_PAGE_SIZE)
  restore_interrupts(interrupts);
  bool unlocked = false;

  do {
    unlocked = multicore_lockout_end_timeout_us(MULTICORE_LOCKOUT_TIMEOUT);
  } while(!unlocked);
}