bugfix: 修复进程退出时未释放signal和sighand && 增加赞赏者名单：David Wen (#93)

* bugfix: 修复进程退出时未释放signal和sighand的bug

* 增加赞赏者名单：David Wen

README.md

@@ -90,6 +90,7 @@
 
 ### 个人赞赏者列表
 
+- David Wen
 - 悟
 - [TerryLeeSCUT · GitHub](https://github.com/TerryLeeSCUT)
 - slientbard

README_EN.md

@@ -80,6 +80,7 @@ We hope that in the future, some enterprises can sponsor DragonOS and inject fin
 
 ### Individual Sponsor List
 
+- David Wen
 - 悟
 - [TerryLeeSCUT · GitHub](https://github.com/TerryLeeSCUT)
 - slientbard

kernel/src/process/process.c

@@ -46,6 +46,9 @@ extern struct mm_struct initial_mm;
 extern struct signal_struct INITIAL_SIGNALS;
 extern struct sighand_struct INITIAL_SIGHAND;
 
+extern void process_exit_sighand(struct process_control_block *pcb);
+extern void process_exit_signal(struct process_control_block *pcb);
+
 // 设置初始进程的PCB
 #define INITIAL_PROC(proc)                                                                                             \
     {                                                                                                                  \
@@ -91,8 +94,6 @@ uint64_t process_exit_files(struct process_control_block *pcb);
  */
 uint64_t process_exit_mm(struct process_control_block *pcb);
 
-
-
 /**
  * @brief 切换进程
  *
@@ -784,7 +785,6 @@ uint64_t process_exit_mm(struct process_control_block *pcb)
     return 0;
 }
 
-
 /**
  * @brief todo: 回收线程结构体
  *
@@ -811,7 +811,8 @@ int process_release_pcb(struct process_control_block *pcb)
     // todo: 对相关的pcb加锁
     pcb->prev_pcb->next_pcb = pcb->next_pcb;
     pcb->next_pcb->prev_pcb = pcb->prev_pcb;
-
+    process_exit_sighand(pcb);
+    process_exit_signal(pcb);
     // 释放当前pcb
     kfree(pcb);
     return 0;