On Sat, Jun 5, 2010 at 3:20 PM, Joel Fernandes <agnel.joel@xxxxxxxxx> wrote: > On Sat, Jun 5, 2010 at 11:14 AM, Vimal <j.vimal@xxxxxxxxx> wrote: >> On 4 June 2010 17:16, Group <mailforgroup@xxxxxxxxx> wrote: >>> Hi, >>> >>> Is it possible to access threads stack (not shared) from another thread? >>> I have seen an API which gets the attributes for the stack >>> pthread_attr_getstack(). >>> But is it possible to access the DATA on the thread stack?. Is there any api >>> for it?. >> >> Since the stack address is just a memory address, so you can >> dereference it to read values. If you as a program writer know which >> function executes on the stack, you could create a struct that reads >> values off it (integers, strings, floats, etc., instead of just >> bytes). >> > > Don't think its that simple because note that each thread has is in > its own address space. I'm sorry I got confused between processes and threads, you are indeed correct- threads are processes that share file descriptors, address space and sighands. now i have a question, even if they share the same vm address space - they definitely can't share the userspace stack, i'm sure the kernel would have to reset it up in the same address space of the group of threads but I really don't know how that works - could you share your thoughts on this? thanks, -Joel -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
