On Mon, Sep 19, 2011 at 1:07 PM, Collin McCurdy <[email protected]> wrote: > I am interested in using libunwind to examine, from the kernel, the stack of > an interrupted user process (due to hardware performance counter overflow, > for example). > > Would the right way to go about this be to use the remote interface via > unw_create_addr_space() and appropriate accessor functions? Or is there an > easier way? Has this been done already?
I'm not aware of anyone implementing this. It might be more efficient to use the local interface. You'll also have the luxury of using copy_from_user() to access the address space without worrying about SIGSEGVs. An alternate design for performance counters is to send a signal to user space on counter overflow and do the unwinding in user space. I have some sample code to share if you want to pursue this path. -Arun _______________________________________________ Libunwind-devel mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/libunwind-devel
