chirping78 commented on PR #10496:
URL: https://github.com/apache/nuttx/pull/10496#issuecomment-1758804497
I tried to print the cpu/pid of the task which has disabled IRQ with
following changed `up_irq_save`.
Please note that:
- the changed part is closed in `#if 1` and `#endif`
- can not use `syslog` / `info`, which will call `up_irq_save` recursively.
So `up_putc` is used here
- can not use `up_interrupt_context` / `gettid`. They call `up_irq_save`
recursively. So copy their logic here (the IRQ is disabled)
```
irqstate_t up_irq_save(void)
{
unsigned int cpsr;
#if 1
int cpu;
pid_t tid;
static pid_t printed_pid[2] = {0};
#endif
__asm__ __volatile__
(
"\tmrs %0, cpsr\n"
"\tcpsid i\n"
#if defined(CONFIG_ARMV7A_DECODEFIQ)
"\tcpsid f\n"
#endif
: "=r" (cpsr)
:
: "memory"
);
#if 1
if (g_nx_initstate >= OSINIT_IDLELOOP && CURRENT_REGS == NULL)
{
cpu = up_cpu_index();
struct tcb_s *rtcb = current_task(cpu);
tid = rtcb->pid;
if (!(cpsr & 0x80))
{
if (tid != printed_pid[cpu])
{
up_putc(cpu + '0');
//up_putc(':');
up_putc((tid / 10) + '0');
up_putc((tid % 10) + '0');
//up_putc(':');
//up_putc('0');
up_putc('\n');
printed_pid[cpu] = tid;
}
}
}
#endif
return cpsr;
}
```
The bad news is, with the change this issue can not be reproduced, although
the change has been limit to minimum range.
Any other suggestion? @masayuki2009
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