[lkml]   [2018]   [Nov]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v4 1/2] ptrace: save the type of syscall-stop in ptrace_message
On 11/30, Dmitry V. Levin wrote:
> On Thu, Nov 29, 2018 at 03:47:43PM +0100, Oleg Nesterov wrote:
> > > so that PTRACE_GETEVENTMSG users can easily tell
> > > whether this new semantics is supported by the kernel or not.
> >
> > Yes. And how much this can help? Again, an application can trivially detect
> > if this feature implemented or not, and it should do this anyway if it wants
> How an application can easily detect whether this feature is implemented?

As I already said, it can just do ptrace(PTRACE_GET_SYSCALL_INFO, NULL) ?
If it returns -EIO then this feature is not implemented. Any other error
code (actually EINVAL or EFAULT) means it is implemented.


 \ /
  Last update: 2018-11-30 12:29    [W:0.087 / U:6.712 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site