On Saturday 11 June 2005 19:46, David Laight wrote: > On Sat, Jun 11, 2005 at 09:17:09AM +1000, Robert Lunnon wrote: > > I need some help to implement the debugger under Solaris. In particular I > > need help with how ptrace interacts with the threading model under Linux > > which I understand uses processes for threads. Since Solaris has user > > mode threads, stopping a pid stops all the threads in the debugee which > > used to deadlock the debugger. This suggests I need to operate on threads > > within processes rather than the processes themselves. This is possible > > with a few IPC tricks, but I need to understand the semantics > > I think you will find that solaris uses kernel LWPs for threads. > If you give ps the correct incantation it wil show them. > > David
My Solaris implementation (which is the only one out there at the moment) uses bound threads, the lwp implementation no longer works. It doesn't matter really, the lwps share a common pid whereas under linux, I understand they do not, so ptrace under linux should be able to work on threads where ptrace under Solaris definitely cannot. Ptrace is going away under solaris anyway, so I will need the debugger code for the future anyway. Bob
