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shell: show IRQ stack information

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This is placeholder code; better kernel support for dumping
exception/interrupt related stacks is forthcoming.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2020-03-13 10:14:43 -07:00 • committed by Anas Nashif
commit 22b9167acb
1 changed files with 28 additions and 0 deletions
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28
subsys/shell/modules/kernel_service.c
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@ -131,12 +131,40 @@ static void shell_stack_dump(const struct k_thread *thread, void *user_data)
size, unused, size - unused, size, pcnt);
}
extern K_THREAD_STACK_DEFINE(_interrupt_stack, CONFIG_ISR_STACK_SIZE);
static int cmd_kernel_stacks(const struct shell *shell,
size_t argc, char **argv)
{
u8_t *buf;
size_t size, unused = 0;
ARG_UNUSED(argc);
ARG_UNUSED(argv);
k_thread_foreach(shell_stack_dump, (void *)shell);
/* Placeholder logic for interrupt stack until we have better
* kernel support, including dumping all IRQ stacks for SMP systems
* and hooks to dump arch-specific exception-related stack buffers.
*
* For now, dump data for the first IRQ stack defined in init.c
*/
buf = Z_THREAD_STACK_BUFFER(_interrupt_stack);
size = K_THREAD_STACK_SIZEOF(_interrupt_stack);
for (size_t i = 0; i < K_THREAD_STACK_SIZEOF(_interrupt_stack); i++) {
if (buf[i] == 0xAAU) {
unused++;
} else {
break;
}
}
shell_print(shell,
"%p IRQ 0 (real size %zu):\tunused %zu\tusage %zu / %zu (%zu %%)",
_interrupt_stack, size, unused, size - unused, size,
((size - unused) * 100U) / size);
return 0;
}
#endif