diff options
Diffstat (limited to 'include/linux/ptrace.h')
| -rw-r--r-- | include/linux/ptrace.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h index b546fd6c350..bb157bdd0c5 100644 --- a/include/linux/ptrace.h +++ b/include/linux/ptrace.h @@ -151,6 +151,24 @@ int generic_ptrace_pokedata(struct task_struct *tsk, unsigned long addr, unsigned long data); /** + * ptrace_parent - return the task that is tracing the given task + * @task: task to consider + * + * Returns %NULL if no one is tracing @task, or the &struct task_struct + * pointer to its tracer. + * + * Must called under rcu_read_lock(). The pointer returned might be kept + * live only by RCU. During exec, this may be called with task_lock() held + * on @task, still held from when check_unsafe_exec() was called. + */ +static inline struct task_struct *ptrace_parent(struct task_struct *task) +{ + if (unlikely(task->ptrace)) + return rcu_dereference(task->parent); + return NULL; +} + +/** * ptrace_event_enabled - test whether a ptrace event is enabled * @task: ptracee of interest * @event: %PTRACE_EVENT_* to test |