Runtime: Module to migrate builtin programs to Core BPF

[buffalojoec]

I'm introducing this PR as a draft to hopefully gather some feedback on the approach and some of the various things this migration path touches.

I've carefully structured the commits to ensure maximum readability, including saving the Bank modifications required for testing the migrations for last (coming soon).

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Problem

Now that SIMD 0088 has been merged, the runtime requires a code path for migrating built-in programs to Core BPF.

Solution

The static BUILTINS list, which houses the source-of-truth for all runtime built-in programs, contains a feature_id field for activating new built-in programs.

Building on this architecture, I've included a new field for core_bpf_migration configurations, which the runtime can use on epoch rollover to migrate a built-in to Core BPF and ensure it's handled properly by both the Bank and the program cache.

The config defines two main fields:

• Source BPF Program: The upgradeable BPF program that will be moved in place of the built-in.
• Feature ID: The feature ID whose activation will trigger the migration.

To ensure maximum safety when enabling migrations, I've abstracted all of the checks and account manipulation required to perform the migration away into the builtin module's sub-module core_bpf_migration.

To migrate a built-in program to Core BPF, contributors need only add the source program ID and the feature ID to the built-in's config.

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Note: Once #35267 lands I can add a commit with feature activation tests.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 74.93917% with 103 lines in your changes are missing coverage. Please review.

Project coverage is 81.6%. Comparing base (e8c87e8) to head (5221627). Report is 5 commits behind head on master.

:exclamation: Current head 5221627 differs from pull request most recent head a518972. Consider uploading reports for the commit a518972 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #35260     +/-   ##
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- Coverage    81.8%    81.6%   -0.2%     
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  Files         834      837      +3     
  Lines      224815   225158    +343     
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- Hits       183919   183787    -132     
- Misses      40896    41371    +475     

[willhickey]

This repository is no longer in use. Please re-open this pull request in the agave repo: https://github.com/anza-xyz/agave