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authorTejun Heo <tj@kernel.org>2011-06-17 16:50:37 +0200
committerOleg Nesterov <oleg@redhat.com>2011-06-22 19:26:28 +0200
commita288eecce5253cc1565d400a52b9b476a157e040 (patch)
treea933dd8c9791be83b7a67a33502c79e7b441960e /kernel/exit.c
parentf3c04b934d429b1ace21866f011b66de328c0dc9 (diff)
ptrace: kill trivial tracehooks
At this point, tracehooks aren't useful to mainline kernel and mostly just add an extra layer of obfuscation. Although they have comments, without actual in-kernel users, it is difficult to tell what are their assumptions and they're actually trying to achieve. To mainline kernel, they just aren't worth keeping around. This patch kills the following trivial tracehooks. * Ones testing whether task is ptraced. Replace with ->ptrace test. tracehook_expect_breakpoints() tracehook_consider_ignored_signal() tracehook_consider_fatal_signal() * ptrace_event() wrappers. Call directly. tracehook_report_exec() tracehook_report_exit() tracehook_report_vfork_done() * ptrace_release_task() wrapper. Call directly. tracehook_finish_release_task() * noop tracehook_prepare_release_task() tracehook_report_death() This doesn't introduce any behavior change. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Christoph Hellwig <hch@infradead.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Diffstat (limited to 'kernel/exit.c')
-rw-r--r--kernel/exit.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index e5cc05644609..d49134a7f250 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -169,7 +169,6 @@ void release_task(struct task_struct * p)
struct task_struct *leader;
int zap_leader;
repeat:
- tracehook_prepare_release_task(p);
/* don't need to get the RCU readlock here - the process is dead and
* can't be modifying its own credentials. But shut RCU-lockdep up */
rcu_read_lock();
@@ -179,7 +178,7 @@ repeat:
proc_flush_task(p);
write_lock_irq(&tasklist_lock);
- tracehook_finish_release_task(p);
+ ptrace_release_task(p);
__exit_signal(p);
/*
@@ -868,8 +867,6 @@ static void exit_notify(struct task_struct *tsk, int group_dead)
wake_up_process(tsk->signal->group_exit_task);
write_unlock_irq(&tasklist_lock);
- tracehook_report_death(tsk, signal, cookie, group_dead);
-
/* If the process is dead, release it - nobody will wait for it */
if (signal == DEATH_REAP)
release_task(tsk);
@@ -924,7 +921,7 @@ NORET_TYPE void do_exit(long code)
*/
set_fs(USER_DS);
- tracehook_report_exit(&code);
+ ptrace_event(PTRACE_EVENT_EXIT, code);
validate_creds_for_do_exit(tsk);