提交 bb3696da 编写于 作者: O Oleg Nesterov

ptrace: kill real_parent_is_ptracer() in in favor of ptrace_reparented()

Kill real_parent_is_ptracer() and update the callers to use
ptrace_reparented(), after the previous patch they do the same.

Remove the unnecessary ->ptrace != 0 check in get_signal_to_deliver(),
if ptrace_reparented() == T then the task must be ptraced.
Signed-off-by: NOleg Nesterov <oleg@redhat.com>
Acked-by: NTejun Heo <tj@kernel.org>
上级 0347e177
......@@ -1759,15 +1759,6 @@ static int sigkill_pending(struct task_struct *tsk)
sigismember(&tsk->signal->shared_pending.signal, SIGKILL);
}
/*
* Test whether the target task of the usual cldstop notification - the
* real_parent of @child - is in the same group as the ptracer.
*/
static bool real_parent_is_ptracer(struct task_struct *child)
{
return same_thread_group(child->parent, child->real_parent);
}
/*
* This must be called with current->sighand->siglock held.
*
......@@ -1848,7 +1839,7 @@ static void ptrace_stop(int exit_code, int why, int clear_code, siginfo_t *info)
* separately unless they're gonna be duplicates.
*/
do_notify_parent_cldstop(current, true, why);
if (gstop_done && !real_parent_is_ptracer(current))
if (gstop_done && ptrace_reparented(current))
do_notify_parent_cldstop(current, false, why);
/*
......@@ -2154,7 +2145,6 @@ int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka,
* the CLD_ si_code into SIGNAL_CLD_MASK bits.
*/
if (unlikely(signal->flags & SIGNAL_CLD_MASK)) {
struct task_struct *leader;
int why;
if (signal->flags & SIGNAL_CLD_CONTINUED)
......@@ -2175,13 +2165,11 @@ int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka,
* a duplicate.
*/
read_lock(&tasklist_lock);
do_notify_parent_cldstop(current, false, why);
leader = current->group_leader;
if (leader->ptrace && !real_parent_is_ptracer(leader))
do_notify_parent_cldstop(leader, true, why);
if (ptrace_reparented(current->group_leader))
do_notify_parent_cldstop(current->group_leader,
true, why);
read_unlock(&tasklist_lock);
goto relock;
......
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