[Lldb-commits] [lldb] [lldb/aarch64] Fix unwinding when signal interrupts a leaf function (PR #91321)

[Pavel Labath via lldb-commits]

labath wrote:

> > > LLDB became unresponsive on windows when a `thread backtrace` command was issued after hitting the exception i have temporarily reverted the change to make buildbot green.
> > 
> > 
> > Could you please give me some more information about the problem? I don't have access to a windows arm machine, and the failure message doesn't give me much to go on.
> 
> I will try to debug and get back with more information. If you need specific information or logs please let me know.

Thanks. It's hard to say what exactly will help, because I don't have any idea what could be going wrong. *However*, since this is an unwinding problem, the `unwind` log will probably contain some clues. Since this is causing a hang, simply getting the backtrace of lldb in the hanging state would likely be useful. Same goes for the disassembly and the unwind plans (`image show-unwind`) of the functions on the target stack at the point of hanging.

I know this is quite a lot, but I'm kinda shooting in the dark here. :)

https://github.com/llvm/llvm-project/pull/91321