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[PR #4120] [CLOSED] fix(native): record an empty Objective-C category name as a category failure #6070

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opened 2026-10-31 01:11:37 +00:00 by bsakaguchi · 0 comments

bsakaguchi commented

2026-10-31 01:11:37 +00:00

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📋 Pull Request Information

Original PR: https://github.com/morluto/rea/pull/4120
Author: @Ali-Tharwat
Created: 10/15/2026
Status: ❌ Closed

Base: main ← Head: fix/objc-empty-category-name

📝 Commits (1)

11c03c3 fix(native): record an empty Objective-C category name as a category failure

📊 Changes

2 files changed (+39 additions, -2 deletions)

View changed files

📝 src/native/AppleDispatchMetadata.test.ts (+37 -2)
📝 src/native/AppleObjcCategories.ts (+2 -0)

📄 Description

Summary

A category declaration whose name is an empty (NUL-only) string was accepted as decoded, causing final objcSwiftMetadataSchema.parse validation of objc_categories[].name to fail with ZodError (too_small, minimum 1) and decodeAppleDispatchMetadata to discard all independently decoded classes from the same image. The category decoder now rejects the empty name inside its per-category boundary, mirroring the protocol decoder fix from #4078, so the malformed category is recorded as a partial-coverage failure (category_decode_failed) and valid classes are retained.

Fixes #4115

Problem and expected behavior

In Mach-O targets where __objc_catlist contains a category with an empty name, read.string(read.pointer(category)) returns "". This passed through the per-category try/catch and populated result.objc_categories. At the end of analysis, objcSwiftMetadataSchema.parse(result) threw a ZodError on objc_categories[0].name, aborting metadata inspection and discarding all decoded classes.

Expected: The category decoder rejects the empty name inside the per-category boundary, records an issue with code: category_decode_failed, and preserves valid classes in the same binary image.

Change and scope

Added an empty name check (if (name.length === 0) throw new TypeError("Objective-C category has an empty name");) in src/native/AppleObjcCategories.ts inside the per-category try block.
The thrown error is caught by the existing catch block, recording category_decode_failed with the empty name message and marking objc_properties_categories facet coverage as partial.
Added regression test keeps classes when a category has an empty name to src/native/AppleDispatchMetadata.test.ts.

Scope: Ordinary fix within the native Mach-O metadata parser boundary; no maintainer scope decision required.

Contract and boundary impact

Semantic owner and earliest changed stage: src/native/AppleObjcCategories.ts (category parser stage).
Contribution scope fit and linked maintainer decision: not applicable.
CLI and MCP/tool-catalog contract: unchanged schema; preserves valid classes and returns partial category coverage on malformed names.
Provider, bridge, target-format, or platform compatibility: Mach-O Objective-C metadata parsing.
Evidence, artifact, provenance, or reconstruction contract: unchanged.
Target selection, authority, upstream behavior, and cleanup details: none.
Generated metadata, package, or installation impact: none.

Expected effects:

Documentation or usability only; no target interaction.

Evidence and regression coverage

Tests added or updated: src/native/AppleDispatchMetadata.test.ts (keeps classes when a category has an empty name).
Base reproduction: The test fails on the base revision with ZodError: [ { origin: 'string', code: 'too_small', minimum: 1, path: [ 'objc_categories', 0, 'name' ] } ].
Remaining proof gaps: none.

For evidence-bearing changes:

Observed, derived, and inferred claims remain distinguishable.
Artifact identity, source provenance, and failed attempts remain preserved.
Unsupported, incomplete, unavailable, or uncertain outcomes remain visible.

Validation performed

npm run test:focused -- src/native/AppleDispatchMetadata.test.ts — 43 passed (including new reproduction test).
npm run test:focused -- src/native/AppleDispatchMetadata.test.ts src/native/AppleMachoFixups.test.ts src/native/AppleMachoSelection.test.ts src/native/AppleSwiftVtables.test.ts src/native/NativeCallObservation.test.ts src/native/NativeMacOSProviderInput.test.ts src/native/NativeMachoInspection.test.ts src/native/NativeUiObservation.test.ts src/native/SignatureTargetBinding.test.ts — 147 passed.
npm run check:fast — typecheck and lint passed.
npm run docs:check — documentation and license checks passed.

Compatibility, safety, and release

Breaking changes or migration steps: none.
Real Hopper/Ghidra, browser, or OS coverage: in-memory Mach-O parser verification on Windows host.
Package or release metadata impact: none.
Security, privacy, process, or containment review: safe bounds-checked metadata parser change.

Author readiness

Human owner: @Ali-Tharwat

I reviewed the final diff and relevant existing code, understand the change and its edge cases, and take responsibility for the complete PR, including AI-assisted work.
I checked the evidence above, confirmed it supports the current change, and recorded meaningful validation gaps.
I declare this PR ready for initial maintainer review.

Before merge

This PR addresses a concrete problem or an agreed enhancement.
Material scope and authority questions are resolved, and any required maintainer scope decision covers the final diff.
The PR has one focused outcome and the title follows type(scope): outcome.
Related issue is linked, or the reason for not linking one is stated above.
Tests cover changed observable behavior and meaningful failure paths.
Owning docs, contracts, and generated metadata are updated where needed.
User-visible CLI/MCP changes include representative output.
I checked the final diff for secrets, unrelated cleanup, and unsupported claims.

_{🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.}

## 📋 Pull Request Information **Original PR:** https://github.com/morluto/rea/pull/4120 **Author:** [@Ali-Tharwat](https://github.com/Ali-Tharwat) **Created:** 10/15/2026 **Status:** ❌ Closed **Base:** `main` ← **Head:** `fix/objc-empty-category-name` --- ### 📝 Commits (1) - [`11c03c3`](https://github.com/morluto/rea/commit/11c03c3bc9b77cabf53148459fc56d688e147190) fix(native): record an empty Objective-C category name as a category failure ### 📊 Changes **2 files changed** (+39 additions, -2 deletions) <details> <summary>View changed files</summary> 📝 `src/native/AppleDispatchMetadata.test.ts` (+37 -2) 📝 `src/native/AppleObjcCategories.ts` (+2 -0) </details> ### 📄 Description ## Summary A category declaration whose name is an empty (NUL-only) string was accepted as decoded, causing final `objcSwiftMetadataSchema.parse` validation of `objc_categories[].name` to fail with `ZodError` (`too_small`, minimum 1) and `decodeAppleDispatchMetadata` to discard all independently decoded classes from the same image. The category decoder now rejects the empty name inside its per-category boundary, mirroring the protocol decoder fix from #4078, so the malformed category is recorded as a partial-coverage failure (`category_decode_failed`) and valid classes are retained. Fixes #4115 ## Problem and expected behavior In Mach-O targets where `__objc_catlist` contains a category with an empty name, `read.string(read.pointer(category))` returns `""`. This passed through the per-category `try/catch` and populated `result.objc_categories`. At the end of analysis, `objcSwiftMetadataSchema.parse(result)` threw a `ZodError` on `objc_categories[0].name`, aborting metadata inspection and discarding all decoded classes. Expected: The category decoder rejects the empty name inside the per-category boundary, records an issue with `code: category_decode_failed`, and preserves valid classes in the same binary image. ## Change and scope - Added an empty name check (`if (name.length === 0) throw new TypeError("Objective-C category has an empty name");`) in `src/native/AppleObjcCategories.ts` inside the per-category try block. - The thrown error is caught by the existing catch block, recording `category_decode_failed` with the empty name message and marking `objc_properties_categories` facet coverage as `partial`. - Added regression test `keeps classes when a category has an empty name` to `src/native/AppleDispatchMetadata.test.ts`. Scope: Ordinary fix within the native Mach-O metadata parser boundary; no maintainer scope decision required. ## Contract and boundary impact - Semantic owner and earliest changed stage: `src/native/AppleObjcCategories.ts` (category parser stage). - Contribution scope fit and linked maintainer decision: not applicable. - CLI and MCP/tool-catalog contract: unchanged schema; preserves valid classes and returns partial category coverage on malformed names. - Provider, bridge, target-format, or platform compatibility: Mach-O Objective-C metadata parsing. - Evidence, artifact, provenance, or reconstruction contract: unchanged. - Target selection, authority, upstream behavior, and cleanup details: none. - Generated metadata, package, or installation impact: none. Expected effects: - [x] Documentation or usability only; no target interaction. ## Evidence and regression coverage - Tests added or updated: `src/native/AppleDispatchMetadata.test.ts` (`keeps classes when a category has an empty name`). - Base reproduction: The test fails on the base revision with `ZodError: [ { origin: 'string', code: 'too_small', minimum: 1, path: [ 'objc_categories', 0, 'name' ] } ]`. - Remaining proof gaps: none. For evidence-bearing changes: - [x] Observed, derived, and inferred claims remain distinguishable. - [x] Artifact identity, source provenance, and failed attempts remain preserved. - [x] Unsupported, incomplete, unavailable, or uncertain outcomes remain visible. ## Validation performed - `npm run test:focused -- src/native/AppleDispatchMetadata.test.ts` — 43 passed (including new reproduction test). - `npm run test:focused -- src/native/AppleDispatchMetadata.test.ts src/native/AppleMachoFixups.test.ts src/native/AppleMachoSelection.test.ts src/native/AppleSwiftVtables.test.ts src/native/NativeCallObservation.test.ts src/native/NativeMacOSProviderInput.test.ts src/native/NativeMachoInspection.test.ts src/native/NativeUiObservation.test.ts src/native/SignatureTargetBinding.test.ts` — 147 passed. - `npm run check:fast` — typecheck and lint passed. - `npm run docs:check` — documentation and license checks passed. ## Compatibility, safety, and release - Breaking changes or migration steps: none. - Real Hopper/Ghidra, browser, or OS coverage: in-memory Mach-O parser verification on Windows host. - Package or release metadata impact: none. - Security, privacy, process, or containment review: safe bounds-checked metadata parser change. ## Author readiness Human owner: @Ali-Tharwat - [x] I reviewed the final diff and relevant existing code, understand the change and its edge cases, and take responsibility for the complete PR, including AI-assisted work. - [x] I checked the evidence above, confirmed it supports the current change, and recorded meaningful validation gaps. - [x] I declare this PR ready for initial maintainer review. ## Before merge - [x] This PR addresses a concrete problem or an agreed enhancement. - [x] Material scope and authority questions are resolved, and any required maintainer scope decision covers the final diff. - [x] The PR has one focused outcome and the title follows `type(scope): outcome`. - [x] Related issue is linked, or the reason for not linking one is stated above. - [x] Tests cover changed observable behavior and meaningful failure paths. - [x] Owning docs, contracts, and generated metadata are updated where needed. - [x] User-visible CLI/MCP changes include representative output. - [x] I checked the final diff for secrets, unrelated cleanup, and unsupported claims. --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>

bsakaguchi

2026-10-31 01:11:37 +00:00

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