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A panic unwind print lock

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This commit is contained in:
Zhang Junyang
2024-08-26 16:29:22 +08:00
committed by Tate, Hongliang Tian
parent c9347e59f4
commit cf4aee0061
1 changed files with 9 additions and 1 deletions
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10
ostd/src/panicking.rs
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@ -7,6 +7,7 @@ use core::ffi::c_void;
use crate::{
arch::qemu::{exit_qemu, QemuExitCode},
cpu_local_cell, early_print, early_println,
sync::SpinLock,
};
extern crate cfg_if;
@ -55,7 +56,6 @@ pub fn panic_handler(info: &core::panic::PanicInfo) -> ! {
begin_panic(Box::new(throw_info.clone()));
}
early_println!("{}", info);
early_println!("Printing stack trace:");
print_stack_trace();
abort();
}
@ -66,6 +66,13 @@ pub fn abort() -> ! {
}
fn print_stack_trace() {
/// We acquire a global lock to prevent the frames in the stack trace from
/// interleaving. The spin lock is used merely for its simplicity.
static BACKTRACE_PRINT_LOCK: SpinLock<()> = SpinLock::new(());
let _lock = BACKTRACE_PRINT_LOCK.lock();
early_println!("Printing stack trace:");
struct CallbackData {
counter: usize,
}
@ -99,6 +106,7 @@ fn print_stack_trace() {
early_print!("\n\n");
UnwindReasonCode::NO_REASON
}
let mut data = CallbackData { counter: 0 };
_Unwind_Backtrace(callback, &mut data as *mut _ as _);
}