On Thu, Jun 9, 2011 at 11:01 PM, John David Anglin <dave@xxxxxxxxxxxxxxxxxx> wrote: > On Thu, 09 Jun 2011, Carlos O'Donell wrote: > >> This looks like a combination of multiple bugs, the process is >> probably dead, or not running, which is why gdb can't do anything with >> it. I'm surprised the ptrace API isn't returning some more diagnostics >> about the stuck process. > > Why do you think the processes are dead or not running? Top thinks > they are running at 100% CPU. The general system responsiveness > seemed like full load. If it's not dead, and running, why do you always attach and show $pc at the same place? This is either a ptrace bug, a gdb bug, or a kernel bug. Either: * Ptrace is incorrectly always returning $pc at a fixed location. * Process is stuck faulting, running a signal handler, and returning to the fault location. - Does gnat it have a signal handler? * Kernel is not running the process therefore whenever you attach it's in the same place. * gdb bug causes the process to always show as being in the same place. You have to start ruling these out. Cheers, Carlos. -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
