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bugfix: 修复进程pcb被回收时，未将其从链表中删除的问题 (#87)

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* bugfix: 修复进程pcb被回收时，未将其从链表中删除的问题
new: pcb相关api文档

* 将文档加入目录
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2022-11-18 17:59:33 +08:00
committed by GitHub
parent 0bfe94f46b
commit 3d729e2069
6 changed files with 52 additions and 19 deletions
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11
kernel/src/syscall/syscall.c
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@ -518,14 +518,8 @@ uint64_t sys_wait4(struct pt_regs *regs)
// 查找pid为指定值的进程
// ps: 这里判断子进程的方法没有按照posix 2008来写。
// todo: 根据进程树判断是否为当前进程的子进程
for (proc = &initial_proc_union.pcb; proc->next_pcb != &initial_proc_union.pcb; proc = proc->next_pcb)
{
if (proc->next_pcb->pid == pid)
{
child_proc = proc->next_pcb;
break;
}
}
child_proc = process_find_pcb_by_pid(pid);
if (child_proc == NULL)
return -ECHILD;
@ -542,7 +536,6 @@ uint64_t sys_wait4(struct pt_regs *regs)
if (likely(status != NULL))
*status = child_proc->exit_code;
// copy_to_user(status, (void*)child_proc->exit_code, sizeof(int));
proc->next_pcb = child_proc->next_pcb;
process_release_pcb(child_proc);
return 0;