diff options
| -rw-r--r-- | include/linux/tracehook.h | 14 | ||||
| -rw-r--r-- | kernel/signal.c | 4 |
2 files changed, 17 insertions, 1 deletions
diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h index 4c50e1b5734..43bc51b6bd3 100644 --- a/include/linux/tracehook.h +++ b/include/linux/tracehook.h @@ -423,6 +423,20 @@ static inline int tracehook_consider_fatal_signal(struct task_struct *task, } /** + * tracehook_force_sigpending - let tracing force signal_pending(current) on + * + * Called when recomputing our signal_pending() flag. Return nonzero + * to force the signal_pending() flag on, so that tracehook_get_signal() + * will be called before the next return to user mode. + * + * Called with @current->sighand->siglock held. + */ +static inline int tracehook_force_sigpending(void) +{ + return 0; +} + +/** * tracehook_get_signal - deliver synthetic signal to traced task * @task: @current * @regs: task_pt_regs(@current) diff --git a/kernel/signal.c b/kernel/signal.c index 0e862d3130f..954f77d7e3b 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -134,7 +134,9 @@ void recalc_sigpending_and_wake(struct task_struct *t) void recalc_sigpending(void) { - if (!recalc_sigpending_tsk(current) && !freezing(current)) + if (unlikely(tracehook_force_sigpending())) + set_thread_flag(TIF_SIGPENDING); + else if (!recalc_sigpending_tsk(current) && !freezing(current)) clear_thread_flag(TIF_SIGPENDING); } |