实现原理
strace 跟踪结果:
clone(child_stack=0, flags=CLONE_PARENT_SETTID|SIGCHLD, parent_tidptr=0x7fff936fc388) = 15661clone(child_stack=0
strace 跟踪结果:
clone(child_stack=0, flags=CLONE_PARENT_SETTID|SIGCHLD, parent_tidptr=0x7fff936fc388) = 15661clone(child_stack=0