Hi Amnon, On 11/08, Amnon Shiloh wrote: > > Thanks for the patch, I tried it and it works nicely!
OK, thanks. I'll wait for other comments a bit and then send the patch to Andrew. > Also, I just noticed that this new option (PTRACE_O_EXITKILL) is not > safe with ptrace(PTRACE_TRACEME)+execve, because the parent may die > before even having a chance to set PTRACE_O_EXITKILL! Not safe? I guess you meant that PTRACE_O_EXITKILL can't prevent this race? Yes sure. Or the parent can die before it does PTRACE_O_EXITKILL. > However, that's easy to fix by using PTRACE_ATTACH instead. Or the child can check getppid() == saved_parent_pid after PTRACE_TRACEME. But if you switch to PTRACE_ATTACH, I'd suggest to use PTRACE_SEIZE. Note that, in particular, this allows you to specify the options at attach. As for PF_NO_SIGSTOP, I'll write another email. Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
