[LLDB] On AArch64, reconfigure register context first (#70742) #7828
+14
−17
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
On an SVE/SME the register context configuration may change after the inferior process has executed. This was handled via https://reviews.llvm.org/D159504 but it is reconfiguring and clearing the register context after we've parsed any expedited reigster values from the stop reply packet. That results in lldb having to read each register value one at a time while at that stop location, which will be a performance problem on non-local debug setups.
The configuration & clearing needs to happen first. Also, update the names of the local variables for a little clarity.
(cherry picked from commit d402645)