On Thu, Dec 27, 2018 at 05:36:04PM +0000, Vladimir Sementsov-Ogievskiy wrote: > 23.04.2018 16:28, Pedro Alves wrote: > > On 04/23/2018 02:37 AM, Simon Marchi wrote: > >> On 2018-04-09 10:08 PM, Stefan Hajnoczi wrote: > >>> I wonder what the point of select-frame is then... > >>> > >>> I have CCed the GDB mailing list. Maybe someone can help us. Context: > >>> > >>> QEMU implements coroutines using jmpbuf. We'd like to print coroutine > >>> call stacks in GDB and have a script that works when a process is being > >>> debugged (it sets the registers). > >>> > >>> Now we'd like to extend the script to work on core dumps where it's not > >>> possible to set registers (since there is no process being debugged). > >>> > >>> Is there a way to backtrace an arbitrary call stack in a core dump? > >> > >> Not that I know of. The "frame <stack-addr> <pc-addr>" form of the frame > >> command sounds like it should be usable to achieve that, but it doesn't > >> seem to work in that way. I really wonder if it's working as it was > >> intended initially. I guess using that form of the frame command should > >> override/mask the real current values of $sp and $pc? > > > > Yeah, "frame <args>" has a lot of problems. > > > > This series was working toward sorting out the "frame" command: > > > > https://sourceware.org/ml/gdb-patches/2015-09/msg00248.html > > > > Follow the urls there for more background. > > > > To me, the important questions to answer are here: > > https://sourceware.org/ml/gdb-patches/2015-09/msg00658.html > > > > Unfortunately, I don't think the series moved past that point. > > > > Thanks, > > Pedro Alves > > > > > Hi Pedro! > > Hmm, returned to this topic. I've spent this day digging in gdb code, and > found it much > more difficult than qemu).. > > I've failed to find something like > > create_frame_with_registers, or create_thread_with_registers.. Looks like > registers comes > from some register caches, backed by different sources of registers or > something like this. > > So, I'd like to ask several questions: > > 1. Any news on the topic since April?
Not on my side, sorry. Stefan
signature.asc
Description: PGP signature
