Messages in this thread | | | Date | Wed, 8 Feb 2012 00:56:39 +0400 | From | Cyrill Gorcunov <> | Subject | Re: [PATCH] ptrace: add ability to get clear_tid_address |
| |
On Tue, Feb 07, 2012 at 08:07:38PM +0000, Pedro Alves wrote: > On 02/03/2012 04:51 PM, Oleg Nesterov wrote: > > On 02/03, Pavel Emelyanov wrote: > > >> Because there's no need for current to get this value of himself, but can > >> be useful for e.g. gdb. > > > > OK, perhaps this makes sense, I do not know. > > > > Jan, Pedro, do you think gdb can use PTRACE_GET_TID_ADDRESS (returns > > tracee->clear_child_tid) ? > > Off hand, I'm not picturing a use. But that may well just mean I'm lacking > imagination. Andrew, Pavel, did you have a particular idea in mind when you > said it may be useful for debugging a multithreading program / gdb? >
Might not we set up hw watchpoint on this address and get interrupt before pthread-join will find it? (To be fair I'm not sure if such trick will work, didn't test ;)
Cyrill
| |