the closed threads are leaved as Zombie state

[wofanli]

After Killing a thread, the thread is leaved as Zombie state. Need to invoke Wait/Release syscall to release the resource.

Below are the code snip from golang:

// Release releases any resources associated with the Process p,
// rendering it unusable in the future.
// Release only needs to be called if Wait is not.
func (p *Process) Release() error {
    return p.release()
}

// Kill causes the Process to exit immediately.
func (p *Process) Kill() error {
    return p.kill()
}

// Wait waits for the Process to exit, and then returns a
// ProcessState describing its status and an error, if any.
// Wait releases any resources associated with the Process.
// On most operating systems, the Process must be a child
// of the current process or an error will be returned.
func (p *Process) Wait() (*ProcessState, error) {
    return p.wait()
}