2025-4-14v6

Author: cyh21

docs/日报/2025-4-14.md

@@ -2,6 +2,61 @@
 
 ## 简单移植了Starry-Old的实现
 
+```rust
+#[apply(syscall_instrument)]
+pub fn sys_clone3(clone_args: UserConstPtr<usize>, size: u64) -> LinuxResult<isize> {
+    // warn!("sys_clone3 not implemented");
+    if size < size_of::<CloneArgs>() {
+        return Err(LinuxError::EINVAL);
+    }
+    let curr_process = current();
+    // check if the pointer is valid
+    if clone_args.address().as_ptr() as usize == 0 {
+        return Err(LinuxError::EFAULT);
+    }
+    // get the clone_args
+    let clone_args = unsafe { &*(clone_args.address().as_ptr() as *const CloneArgs) };
+
+    let clone_flag = CloneFlags::from_bits(clone_args.flags).unwrap();
+    if (clone_flag.contains(CloneFlags::CLONE_THREAD) || clone_flag.contains(CloneFlags::CLONE_PARENT))
+        && clone_args.exit_signal != 0
+    {
+        return Err(LinuxError::EINVAL);
+        
+    }
+    if clone_flags.contains(CloneFlags::CLONE_SIGHAND)
+        && !clone_flags.contains(CloneFlags::CLONE_VM)
+    {
+        // Error when CLONE_SIGHAND was specified in the flags mask, but CLONE_VM was not.
+        return Err(LinuxError::EINVAL);
+    }
+    let stack = if clone_args.stack == 0 {
+        None
+    } else {
+        Some((clone_args.stack + clone_args.stack_size) as usize)
+    };
+    // let sig_child = if clone_args.exit_signal != 0 {
+    //     Some(SignalNo::from(clone_args.exit_signal as usize))
+    // } else {
+    //     None
+    // };
+    let sig_child = None;
+
+    if clone_args.stack != 0 && (clone_args.stack % 16 != 0 || clone_args.stack_size == 0) {
+        return Err(LinuxError::EINVAL);
+    }
+    if let Ok(new_task_id) = curr_process.task_ext().clone_task(clone_flag, stack, clone_args.parent_tid, clone_args.tls, sig_child){
+        // let new_task_id = curr_process.task_ext().clone_task(clone_flag, stack, clone_args.parent_tid, sig_child);
+        // let new_task_id = curr_process.task_ext().clone_task(clone_flag, stack, clone_args.parent_tid, sig_child);
+        return Ok(new_task_id as isize);
+    } else {
+        return Err(LinuxError::ENOMEM);
+    }
+
+    Ok(0);
+}
+```
+
 希望进一步通过测例来观察和调整
 
 ## 编写简单测例