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Better comments around the panic handler

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This commit is contained in:
Gwilym Inzani 2024-04-17 17:52:03 +01:00
parent 18b25e242e
commit 642c3c1b79
1 changed files with 6 additions and 2 deletions
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8
agb/src/lib.rs
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@ -214,11 +214,15 @@ fn panic_implementation(info: &core::panic::PanicInfo) -> ! {
loop {} loop {}
} }
// If we panic during the panic handler, then there isn't much we can do any more. So this code
// just infinite loops halting the CPU.
fn avoid_double_panic() { fn avoid_double_panic() {
static IS_PANICKING: portable_atomic::AtomicBool = portable_atomic::AtomicBool::new(false); static IS_PANICKING: portable_atomic::AtomicBool = portable_atomic::AtomicBool::new(false);
if IS_PANICKING.load(portable_atomic::Ordering::SeqCst) { if IS_PANICKING.load(portable_atomic::Ordering::SeqCst) {
// we panicked during the panic handler, so not much we can do here loop {
loop {} syscall::halt();
}
} else { } else {
IS_PANICKING.store(true, portable_atomic::Ordering::SeqCst); IS_PANICKING.store(true, portable_atomic::Ordering::SeqCst);
} }