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morluto
cb4e5cfbff
* refactor(analysis): centralize resource budgets and recovery facts * feat(analysis): expose ASAR and Ghidra runtime admission controls * feat(artifacts): expose reader admission and preserve limited recognition * feat(javascript): expose recoverable semantic precision budgets * feat(web): add recoverable source-map budgets and compact retained views * feat(web): make historical capture decoding budgets recoverable * fix(desktop): enforce selected view policies across capture and export * feat(runtime): make Frida and LLDB retention budgets selectable * feat(native): expose diagnostic budgets and preserve exhaustion causes * feat(managed): expose recoverable snapshot and representation budgets * feat(metadata): make Go and Rust inspection budgets recoverable * feat(wasm): expose representation and producer admissions * feat(evm): expose per-call worker resource budgets * feat(android): make resource and string-pool omissions recoverable * feat(producers): expose command and recorded-capture budgets * docs(analysis): record recovery contracts and integrated validation * fix(docs): link calibration oracle from published verification pages * fix(docs): restore desktop task anchors and receipt links * test(analysis): align fixtures with selectable budget contracts * fix(analysis): remove source-location projector dependency cycle * test(analysis): refresh budget recovery and verifier regressions * test(analysis): preserve format and publication recovery expectations * test(windows): align conformance with owned runtime admission * fix(desktop): preserve selected alias kinds in exported state * test(analysis): align provider fixtures with recoverable budgets * test(desktop): validate emitted alias metadata structurally * fix(ghidra): classify bounded Windows endpoint refusals * test(cli): assert selectable artifact admission recovery * fix(cli): preserve capture provenance in environment builds
78 lines
4.8 KiB
Markdown
78 lines
4.8 KiB
Markdown
# Bun standalone executables
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`inspect-artifact` inventories embedded Bun module graphs in Mach-O `__BUN,__bun`,
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PE `.bun`, ELF `.bun`, and appended trailers. `extract-artifact` writes their stored
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module contents through the existing safe output tree. Neither operation executes
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the executable or decompiles bytecode.
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```sh
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rea inspect-artifact ./hello --json
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rea extract-artifact ./hello --json
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```
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In MCP, open the executable with `open_binary`, then call `inspect_artifact`.
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Use `detail: "summary"` for large graphs and `inspect_analysis_view` to page retained
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Evidence. The root metadata's `entry_point_logical_path` is the reader-owned
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location of its entry module. Use it as an inventory `logical_paths` filter,
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then read selected node fields with the returned content identity. This also
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works for names mapped to indexed extraction paths. The complete Evidence stays
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retained; no source-name normalization is needed in the caller.
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The root reports the carrier, layout, module count, entry point, raw flags and
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compile exec-argv. Each module retains its source name, loader and encoding values,
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entry-point status, sizes and SHA-256. Sourcemaps, bytecode and module-info regions
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are separate children. Source names such as `/$bunfs/root/main.js` remain in
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metadata; extraction uses a relative path. Unsafe or non-UTF-8 names receive an
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indexed path and retain their source spelling or bytes. Virtual names deeper
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than the selected `path_parts` allowance (default 256) also use an indexed path with an explicit limitation,
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preventing unbounded path-tree work while retaining the source fact. Duplicate names remain
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separate occurrences; ordinary extraction collision rules apply.
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The recognized record shapes are the 36-byte Bun 1.3.3 layout and the 52-byte
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Bun 1.3.9 layout. These labels identify structural layouts, not a detected compiler
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version. Bun does not store an explicit revision identifier: unknown table sizes
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and ambiguous known layouts are unsupported. A future layout that is byte-for-byte
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compatible cannot be distinguished. Invalid pointers and truncated claimed sections
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are malformed. An absent trailer without a named section does not establish a Bun
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graph. Unknown enum values remain raw, with a null name.
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Sourcemaps are stored Bun regions, not necessarily standalone JSON source maps.
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Extracted contents retain their original encoding. Use JavaScript analysis only on
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compatible source files; bytecode is retained as evidence, not decoded.
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Module parsing reads exact metadata ranges rather than loading stored asset
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bodies or whole pages around small pointers. A cache retains at most 256 KiB
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and 1,024 ranges for one reader preparation. Cumulative uncached metadata reads
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default to 256 MiB, checked before allocation or I/O. The module table,
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decoded strings and combined logical path tree have separate admission checks;
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by default at most 250,000 distinct path prefixes are admitted before inventory construction.
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Stored bodies are range-streamed for hashing and extraction. Header/suffix observations are reused
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only for the same admitted file state, with selected-path checks before publication.
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Both artifact operations accept `artifact_limits.bun`. Its independent controls
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are `payload_bytes`, `module_count`, `representation_bytes`, `metadata_read_bytes`,
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`recognition_table_bytes`, `recognition_load_command_bytes`, `path_parts` and
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`path_nodes`. Failed recognition remains explicitly limited instead of proving
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absence. ELF section names are examined at their actual offsets, including names
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beyond a large section-name prefix. Select `artifact_limits.expanded_bytes` to
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change the aggregate referenced-plaintext work allowance.
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For a reported metadata-read refusal, keep the same carrier and retry with
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`--artifact-limits '{"bun":{"metadata_read_bytes":536870912}}'` or the equivalent
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MCP `artifact_limits` object. Omitted fields keep defaults. The response names
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the effective limit and exact repair; accepted overrides are reported separately
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from caller selections. Changes apply on the next call without restarting REA.
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Summary and selected extraction do not change the producer's admission.
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See [limits and recovery](design/limits-and-recovery.md) for admission ceilings.
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Synthetic tests cover the carriers and malformed declarations. Run
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`node scripts/verify-bun-standalone.mjs` after `npm run build:cached` for local Bun
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verification, and add `--docker` to compile a Linux fixture with `oven/bun:1.4.0`.
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Bun and Docker are fixture producers only and are not installed by REA.
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Layout references: [Bun 1.3.3 serializer](https://github.com/oven-sh/bun/blob/bun-v1.3.3/src/StandaloneModuleGraph.zig)
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and [Bun 1.3.9 serializer](https://github.com/oven-sh/bun/blob/bun-v1.3.9/src/StandaloneModuleGraph.zig).
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The current 52-byte record order can also be checked in the
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[Bun 1.4.4 Rust serializer](https://github.com/oven-sh/bun/blob/bun-v1.4.4/src/standalone_graph/StandaloneModuleGraph.rs).
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