[llvm] [Dexter] Implement DexStepFunction and DexContinue (PR #152721)

[Orlando Cazalet-Hyams via llvm-commits]

OCHyams wrote:

> @OCHyams This broke the x86 bot on green dragon: https://green.lab.llvm.org/job/llvm.org/view/LLDB/job/as-lldb-cmake/32349/
> 
> Can you take a look? The x86 machine is on an older OS/SDK than the arm64 one. Maybe that information helps.

It looks like the link is to a broken arm64 bot, or am I confused? I'm testing on x86 locally and the test passes for me.

Looking at the output... it looks like maybe some of the breakpoints are either not triggering. But equally it could be the code I added that skips unknown breakpoints - @adrian-prantl I was seeing LLDB-DAP return `hitBreakpointIds` with negative IDs (which seems unusual by itself, but importantly the ID doesn't match any of those sent in `Breakpoint` events or `BreakpointLocationsResponse` responses). Do you know what could cause that (or know someone who might)? It may be related to this failure.

In the mean time, I'm out of office now but please feel free to revert this if it's blocking. Otherwise I'll be able to get to it tomorrow morning (UK).

https://github.com/llvm/llvm-project/pull/152721