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newlib: skip locking when within the NMI Irq.

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NMI Irq error paths call into printf which will use the newlib locks
but these can not be used within the NMI, a task switch can not occur
here. This case would be a terminal error path that is attempting to
write some debug message in the process, so just bail out of the
locking in this case. As a warning a ':' character is emitted and this
will typically prefix lines emitted in this context - it would be an
error for this path to be take in normal operation.
This commit is contained in:
Our Air Quality 2018-03-03 09:47:42 +11:00
parent b77380bad1
commit 4bc6032fa6
1 changed files with 7 additions and 0 deletions
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7
core/newlib_syscalls.c
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@ -303,6 +303,10 @@ void _lock_acquire(_lock_t *lock) {
void _lock_acquire_recursive(_lock_t *lock) {
if (locks_initialized) {
if (sdk_NMIIrqIsOn) {
uart_putc(0, ':');
return;
}
xSemaphoreTakeRecursive((QueueHandle_t)*lock, portMAX_DELAY);
}
}
@ -321,6 +325,9 @@ void _lock_release(_lock_t *lock) {
void _lock_release_recursive(_lock_t *lock) {
if (locks_initialized) {
if (sdk_NMIIrqIsOn) {
return;
}
xSemaphoreGiveRecursive((QueueHandle_t)*lock);
}
}