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fix: enable timely delivery of POSIX signals while busy-looping

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jellllly420
2024-06-01 16:10:51 +08:00
committed by Tate, Hongliang Tian
parent 5a23de1932
commit e1480f94ee
7 changed files with 83 additions and 43 deletions
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10
docs/src/framework/a-100-line-kernel.md
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@ -55,7 +55,7 @@ use alloc::vec;
use aster_frame::cpu::UserContext;
use aster_frame::prelude::*;
use aster_frame::task::{Task, TaskOptions};
use aster_frame::user::{UserEvent, UserMode, UserSpace};
use aster_frame::user::{ReturnReason, UserMode, UserSpace};
use aster_frame::vm::{PageFlags, PAGE_SIZE, Vaddr, VmAllocOptions, VmIo, VmMapOptions, VmSpace};
/// The kernel's boot and initialization process is managed by Asterinas Framework.
@ -116,13 +116,15 @@ fn create_user_task(user_space: Arc<UserSpace>) -> Arc<Task> {
loop {
// The execute method returns when system
// calls or CPU exceptions occur.
let user_event = user_mode.execute();
// calls or CPU exceptions occur or some
// events specified by the kernel occur.
let return_reason = user_mode.execute(|| false);
// The CPU registers of the user space
// can be accessed and manipulated via
// the `UserContext` abstraction.
let user_context = user_mode.context_mut();
if UserEvent::Syscall == user_event {
if ReturnReason::UserSyscall == return_reason {
handle_syscall(user_context, current.user_space().unwrap());
}
}