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| author | Wolfram Sang <wsa@the-dreams.de> | 2018-05-17 16:29:19 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2018-05-17 16:29:19 +0200 |
| commit | 3d8b7a4ea310f3621a19d50cbe6cbc89bb23b82f (patch) | |
| tree | 51a261418928d8499ecade36f74e74fc92396503 /kernel/signal.c | |
| parent | c599eb4ff6e0f9c525695faab7149d8d48743b1c (diff) | |
| parent | caaccda136ae3fa1c5f6563aae22ca3c199f563a (diff) | |
| download | talos-op-linux-3d8b7a4ea310f3621a19d50cbe6cbc89bb23b82f.tar.gz talos-op-linux-3d8b7a4ea310f3621a19d50cbe6cbc89bb23b82f.zip | |
Merge branch 'i2c/platform_data-immutable' into i2c/for-4.18
Diffstat (limited to 'kernel/signal.c')
| -rw-r--r-- | kernel/signal.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index d4ccea599692..9c33163a6165 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -1961,14 +1961,27 @@ static void ptrace_stop(int exit_code, int why, int clear_code, siginfo_t *info) return; } + set_special_state(TASK_TRACED); + /* * We're committing to trapping. TRACED should be visible before * TRAPPING is cleared; otherwise, the tracer might fail do_wait(). * Also, transition to TRACED and updates to ->jobctl should be * atomic with respect to siglock and should be done after the arch * hook as siglock is released and regrabbed across it. + * + * TRACER TRACEE + * + * ptrace_attach() + * [L] wait_on_bit(JOBCTL_TRAPPING) [S] set_special_state(TRACED) + * do_wait() + * set_current_state() smp_wmb(); + * ptrace_do_wait() + * wait_task_stopped() + * task_stopped_code() + * [L] task_is_traced() [S] task_clear_jobctl_trapping(); */ - set_current_state(TASK_TRACED); + smp_wmb(); current->last_siginfo = info; current->exit_code = exit_code; @@ -2176,7 +2189,7 @@ static bool do_signal_stop(int signr) if (task_participate_group_stop(current)) notify = CLD_STOPPED; - __set_current_state(TASK_STOPPED); + set_special_state(TASK_STOPPED); spin_unlock_irq(¤t->sighand->siglock); /* |
