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authorMarkus Metzger <markus.t.metzger@intel.com>2008-12-19 09:10:24 -0500
committerIngo Molnar <mingo@elte.hu>2008-12-20 03:15:46 -0500
commitbf53de907dfdaac178c92d774aae7370d7b97d20 (patch)
tree738a07a8b4b22f7bb8ec2029c9ea9c635db6c62a /kernel/fork.c
parent30cd324e9787ccc9a5ede59742d5409857550692 (diff)
x86, bts: add fork and exit handling
Impact: introduce new ptrace facility Add arch_ptrace_untrace() function that is called when the tracer detaches (either voluntarily or when the tracing task dies); ptrace_disable() is only called on a voluntary detach. Add ptrace_fork() and arch_ptrace_fork(). They are called when a traced task is forked. Clear DS and BTS related fields on fork. Release DS resources and reclaim memory in ptrace_untrace(). This releases resources already when the tracing task dies. We used to do that when the traced task dies. Signed-off-by: Markus Metzger <markus.t.metzger@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/fork.c')
-rw-r--r--kernel/fork.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index 7b93da72d4a2..65ce60adc8e8 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1096,6 +1096,8 @@ static struct task_struct *copy_process(unsigned long clone_flags,
1096#ifdef CONFIG_DEBUG_MUTEXES 1096#ifdef CONFIG_DEBUG_MUTEXES
1097 p->blocked_on = NULL; /* not blocked yet */ 1097 p->blocked_on = NULL; /* not blocked yet */
1098#endif 1098#endif
1099 if (unlikely(ptrace_reparented(current)))
1100 ptrace_fork(p, clone_flags);
1099 1101
1100 /* Perform scheduler related setup. Assign this task to a CPU. */ 1102 /* Perform scheduler related setup. Assign this task to a CPU. */
1101 sched_fork(p, clone_flags); 1103 sched_fork(p, clone_flags);