#![no_std]
#![no_main]
#[macro_use]
extern crate user_lib;
extern crate alloc;
use user_lib::{thread_create, exit};
use alloc::vec::Vec;
pub fn thread_a() -> ! {
for i in 0..1000 { print!("{}", i); }
exit(1)
}
#[no_mangle]
pub fn main() -> i32 {
thread_create(thread_a as usize, 0);
println!("main thread exited.");
exit(0)
}
可能的输出为:
>> exit_test
main thread exited.
[kernel] Panicked at src/sync/up.rs:27 already borrowed: BorrowMutError
[kernel] Panicked at src/task/processor.rs:94 called `Option::unwrap()` on a `None` value
[kernel] Panicked at src/task/processor.rs:94 called `Option::unwrap()` on a `None` value
[kernel] Panicked at src/task/processor.rs:94 called `Option::unwrap()` on a `None` value
...
https://rcore-os.github.io/rCore-Tutorial-Book-v3/chapter8/1thread-kernel.html 中说
但示例代码显然不能做到终止其他线程的运行,不用运行任何测试就能直接读出来。
当然这也可以用测试来验证。基于commit 9ad3bb43124648b92e2f95673db4a49c56871de2 ,运行如下测试:
可能的输出为:
虽然这段代码不太符合通常的正确代码的模式,但它也不应该让内核crash。