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[PATCH] pacct: avoidance to refer the last thread as a representation of the process

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When pacct facility generate an 'ac_flag' field in accounting record, it
refers a task_struct of the thread which died last in the process.  But any
other task_structs are ignored.

Therefore, pacct facility drops ASU flag even if root-privilege operations are
used by any other threads except the last one.  In addition, AFORK flag is
always set when the thread of group-leader didn't die last, although this
process has called execve() after fork().

We have a same matter in ac_exitcode.  The recorded ac_exitcode is an exit
code of the last thread in the process.  There is a possibility this exitcode
is not the group leader's one.
This commit is contained in:
KaiGai Kohei 2006-06-25 05:49:25 -07:00 • committed by Linus Torvalds
parent 0e4648141a
commit f6ec29a42d
4 changed files with 32 additions and 24 deletions
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4
kernel/exit.c
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@ -894,8 +894,8 @@ fastcall NORET_TYPE void do_exit(long code)
if (group_dead) {
hrtimer_cancel(&tsk->signal->real_timer);
exit_itimers(tsk->signal);
acct_collect();
}
acct_collect(code, group_dead);
if (unlikely(tsk->robust_list))
exit_robust_list(tsk);
#if defined(CONFIG_FUTEX) && defined(CONFIG_COMPAT)
@ -907,7 +907,7 @@ fastcall NORET_TYPE void do_exit(long code)
exit_mm(tsk);
if (group_dead)
acct_process(code);
acct_process();
exit_sem(tsk);
__exit_files(tsk);
__exit_fs(tsk);