From 3ffa25394753950fa61f08b598bc8eaa70402261 Mon Sep 17 00:00:00 2001
From: Wang Siyuan <wsy@stu.pku.edu.cn>
Date: Wed, 12 Nov 2025 11:59:53 +0000
Subject: [PATCH] Store `Weak<Task>` in `PosixThread`

---
 kernel/src/process/posix_thread/builder.rs | 1 +
 kernel/src/process/posix_thread/mod.rs     | 6 +++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/kernel/src/process/posix_thread/builder.rs b/kernel/src/process/posix_thread/builder.rs
index 486149bf8..0b73fe616 100644
--- a/kernel/src/process/posix_thread/builder.rs
+++ b/kernel/src/process/posix_thread/builder.rs
@@ -163,6 +163,7 @@ impl PosixThreadBuilder {
 
                 PosixThread {
                     process,
+                    task: weak_task.clone(),
                     tid: AtomicU32::new(tid),
                     name: Mutex::new(thread_name),
                     credentials,
diff --git a/kernel/src/process/posix_thread/mod.rs b/kernel/src/process/posix_thread/mod.rs
index 6d1edfd9c..be56e96e1 100644
--- a/kernel/src/process/posix_thread/mod.rs
+++ b/kernel/src/process/posix_thread/mod.rs
@@ -3,7 +3,10 @@
 use core::sync::atomic::{AtomicU32, Ordering};
 
 use aster_rights::{ReadDupOp, ReadOp, WriteOp};
-use ostd::sync::{RoArc, RwMutexReadGuard, Waker};
+use ostd::{
+    sync::{RoArc, RwMutexReadGuard, Waker},
+    task::Task,
+};
 
 use super::{
     signal::{sig_mask::AtomicSigMask, sig_num::SigNum, sig_queues::SigQueues, signals::Signal},
@@ -38,6 +41,7 @@ pub use thread_local::{AsThreadLocal, FileTableRefMut, ThreadLocal};
 pub struct PosixThread {
     // Immutable part
     process: Weak<Process>,
+    task: Weak<Task>,
 
     // Mutable part
     tid: AtomicU32,