函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\file.c Create Date:2022-07-29 10:38:45
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：do_close_on_exec

函数原型：void do_close_on_exec(struct files_struct *files)

返回类型：void

参数：

类型参数名称
struct files_struct *files
679  加自旋锁
680  循环
682  fd等于i乘BITS_PER_LONG
683  fdt等于files_fdtable(files)
684  如果fd大于等于max_fds则退出
686  set等于close_on_exec[i]
687  如果非set则继续下一循环
689  close_on_exec[i]等于0
690  以set循环
692  如果非set按位与1的值则继续下一循环
694  file等于 current fd array [fd]
695  如果非file则继续下一循环
697  cu_assign_pointer() - assign to RCU-protected pointer*@p: pointer to assign to*@v: value to assign (publish)* Assigns the specified value to the specified RCU-protected* pointer, ensuring that any concurrent RCU readers will see* any prior initialization( current fd array [fd], NULL)
698  __put_unused_fd(files, fd)
699  自旋锁解锁
700  "id" is the POSIX thread ID. We use the* files pointer for this..
701  cond_resched()
702  加自旋锁
706  自旋锁解锁
调用者
名称描述
flush_old_execCalling this is the point of no return. None of the failures will be* seen by userspace since either the process is already taking a fatal* signal (via de_thread() or coredump), or will have SEGV raised