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Share exact jump-table metadata and paged case relationships across CLI, MCP and Code Mode. Keep labels, row identities, recovered edges and machine defaults separate; reclaim independent facts under output capacity. Verify all 182 SQLite table targets against ELF bytes through both MCP adapters and retain cases/calls when a real 2 MiB native budget omits IR. Freeze the next analyst question and oracle before real-model trials. [AUTOMATED] Experimental native patch; no upstream integration or PR. Co-authored-by: gensokyo-dev <342580529+gensokyo-dev@users.noreply.github.com> Co-authored-by: Kaoru0822 <208281322+kaoru0822-kitauji@users.noreply.github.com>
132 lines
8.1 KiB
Markdown
132 lines
8.1 KiB
Markdown
# Native cases as composable facts
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The SQLite VM has 182 table entries and 149 distinct targets. Its native
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jump-table owner already knows labels and exact row-to-out-edge mappings;
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the experiment previously exported only the optimized CFG. This closes that
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export/query gap without deriving labels from edge order or block addresses.
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It remains an opt-in experiment, not stock-provider parity or integration.
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## Owners and contracts
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`atomic_membership` gathers BRANCHIND identities during its existing checked
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membership scan. Read-only `JumpTable` accessors borrow native address/label
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rows and edge positions. `atomic_switches` checks the exact linked operation,
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indexes mappings once and exports an independent version-1 facet alongside
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unchanged graph schema 3 and its optional schema-4 compression envelope.
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Ordinary non-opt-in analysis and target executable bytes are unchanged.
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Native limits are 12,000 switches, 100,000 rows/mappings and a shared 2 MiB
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selector/type/address-space text budget, within the existing supervised process
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and 8 MiB document bounds. Source labels stay exact hex strings. Missing tables,
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labels, targets/mappings and the native reserved no-label marker remain explicit.
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No-label status comes from the native owner; it is not guessed from an integer.
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`native-switch-contract` admits rows before expanding validation errors;
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`native-switch-views` owns identity checks, partial coverage and indexes. A full
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graph cross-checks operation/value/edge ownership; without it, shared values are
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checked against available calls/projection facts. Bad switch data makes that
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facet unavailable while preserving independently valid graph/calls/C.
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`switches` returns metadata and selector facts, never an embedded case inventory.
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`relations(kind:cases)` selects labels or original row indexes and pages
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individual case-to-edge relations. A case has a stable case_id; distinct edges
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have distinct relation IDs. Unmapped cases produce one explicit unknown-edge
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row. Relation totals are separate from native row and mapping counts. This
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avoids an unbounded edge array even when limit=1; a regression reads a late
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two-edge page from a 4,096-mapping case in under 1 KiB of returned items.
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Raw rows are retained once. Row lookup is direct, labels have an index, and
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prefix offsets permit paging without constructing all relation projections.
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Single-label offsets are cached only for existing labels, bounded by the
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retained source; arbitrary missing labels and filter combinations do not grow
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that cache. The validated model/lease owns its lifetime. Both MCP adapters and
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the JavaScript CLI consume these same owners.
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The native writer keeps old graph/call coverage ahead of the new facet when
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space is scarce. A source review found that a later projection omission could
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free space without restoring saved switch facts. `bounded_reclaiming` retries
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that saved facet whenever a preferred smaller combination fits. It moves trees,
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does not clone them, and bounds both encoded string alternatives. A focused
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native regression and real 2 MiB CLI captures verify the restored facts.
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## Real provider evidence
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Upstream: `fe01d6294eb0d1053ce343c8943646df88e143fc`.
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Final preserved engine:
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`a9ca8a8ac224936afb08a9d4be9c1225feb69473ad9f35764e8d1c4f04875b5b`.
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Patch SHA-256:
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`9b6642f498f3c9f356b253a2b8b14daf2154cde8eae2d4ab0696f018566e9b73`.
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The initial public checks used preserved `ac6bc7ab...`, before the formatter
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reclamation fix. Binaries are copied outside mutable Cargo outputs and not
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committed. Target/digest and independent machine oracle are in
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[switch-oracle.md](switch-oracle.md).
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Both final actual MCP paths compare every one of the 182 labelled original
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targets with independently reconstructed ELF table entries. Selected loaded
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bytes and dispatch instructions also agree. The native mappings cross-check
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against the full recovered graph; graph and ordinary C/metadata/calls match the
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prior complete golden. That producer comparison does not independently prove
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whole machine/IR equivalence. Each route executes fourteen MCP requests.
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The final wire document is 3,818,818 bytes. Two real native CLI processes with
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an explicit 2 MiB output budget instead produce identical 823,908-byte records:
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graph and projection are explicitly unavailable, while C, 416 calls and all
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182 cases survive. Replaying their retained source through the shared decoder
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again verifies every original target. This establishes the native CLI/decoder
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boundary, not a public MCP no-graph run; the MCP owner keeps its 8 MiB budget.
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The recovered selector is eight bytes but comes from a one-byte LOAD/ZEXT. The
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machine computes its jump address in a different register. Native default edge
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`8:42` points to block 778, origin `0xeacf0`; the unsigned machine out-of-range
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guard instead jumps to `0xea998`. Defaults, original addresses and optimized
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edge identities have separate authority, now stated in the contracts.
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## Executed checks and costs
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The shared JS suites pass 73 cases. Selected native CLI tests pass thirteen;
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one native jump-table test separately checks nonmatching ordinals/labels/edges,
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missing labels and inconsistent row lengths. Focused source lint passes without
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warnings; upstream compiler warnings are outside this patch. Full native corpus,
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stages/workspace and whole-REA gates remain unexecuted or previously resource
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limited; no integration readiness is claimed.
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| Executed scope | Family wall s | Family CPU s | Kernel peak MiB |
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| ----------------------------------------- | ------------: | -----------: | --------------: |
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| First native export build | 397.637 | 366.618 | 2,169.6 |
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| Identity/text-budget build | 432.413 | 388.136 | 2,130.6 |
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| Initial twelve CLI tests | 100.723 | 99.982 | 647.3 |
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| Native jump-table test, including compile | 277.247 | 276.646 | 2,855.5 |
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| Final thirteen CLI tests | 52.204 | 40.984 | 476.4 |
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| Formatter-fix build | 63.414 | 50.208 | 524.5 |
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| Cached final build | 0.522 | 0.189 | 30.1 |
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| Initial Code MCP, ac6bc7ab | 41.698 | 41.415 | 656.5 |
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| Initial direct MCP, ac6bc7ab | 96.920 | 75.949 | 639.2 |
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| Two 2 MiB native CLI captures | 79.377 | 79.060 | 514.7 |
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| Final direct MCP | 44.440 | 44.201 | 635.0 |
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| Final Code MCP | 43.828 | 43.504 | 643.0 |
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| Both catalog/reference checks | 2.033 | 1.839 | 144.4 |
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| Real CLI empty switch/ID selection | 3.646 | 3.397 | 188.8 |
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All resource runs use one CPU, 4 GiB hard / 3 GiB early-stop memory bounds,
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verified cleanup and OOM 0. Peaks include charged file cache, not RSS. Final
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same-lease snapshot plus selected-case reuse takes 4.8 ms / 0.006 CPU seconds
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direct and 8.2 ms / 0.009 Code; cumulative memory peaks only upper-bound isolated
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warm memory. OS caches and host contention are uncontrolled. These scripted
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measurements do not establish token savings or model outcomes.
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The initial direct capture also ran slowly (about 90 seconds), despite
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sequential requests and no model. This shows the earlier long capture is not
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unique to Code Mode or model interaction. The [overlap diagnostic](overlap-study.md)
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did not reproduce it. Its native/host cause remains unresolved; no speed fix or
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causal dispatch comparison is claimed.
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## Model question
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The [question](sqlite-switch-question.txt) and [oracle](switch-oracle.md) must be
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committed before either real model launch. They ask for selected labels,
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source-byte/normalized-selector widths, signed relative target arithmetic and
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the native-default versus machine-guard distinction, starting from function
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name/messages. Both lanes get the full catalog and the same exact discovery,
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envelope and stopping guidance; reverse engineering facts are not precomputed
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for the measured models. Real-model results are pending.
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