Cesarus85--mjolnir-vr/docs/object_matching_logs/hashtable_obj.md

source/memory/hashtable.obj strategy ledger

Final disposition

• Campaign base: a0bad121b7b4e37335acb3ab9a7825fb99861a7a.
• Closing source provenance: Claude-assisted commit af7288955bd217a68067f0432c72abe3f6606c5e, transplanted as a reviewed single-unit delta rather than cherry-picked.
• Compiler: XDK 3911 CL.Exe 13.00.9254.1, /O2 /Oy- /DDEBUG /Dxbox.
• January target: build/split/source/memory/hashtable.obj.
• Status: Matching.
• Code: 10/10 functions, 2,400/2,400 padded bytes, and 103/103 relocations strict-exact under tools/coff_compare.py.
• Target-owned non-code: 10/10 sections and 257/257 logical bytes strict-exact: nine .rdata string COMDATs (227 bytes) plus the externally linked 30-byte _default_hash_polynomial .data object.
• The consolidated linked-image report is 270/270 data bytes because it also attributes 13 bytes of inter-COMDAT alignment/padding to this unit.
• No target-owned .bss section exists in this object.

section_infos_equal proves size, relocation count, relocation address/type, resolved destination, and normalized SHA-256 for every code and target-owned non-code section.

Function	Bytes	Relocs	Normalized SHA-256
_hashtable_new	256	19	070ed08cc66e3d0932c0d107ce7df31b6453b622c617a02deecb5686b32b7879
_hashtable_set_user_data	16	0	d7de9ac73bd916e7fa8ee4115138af50f9dda920f19ebef3d3968c0754c1a202
_hashtable_delete	160	9	c3567857297826d2970e382561fcd34c8efe1b8acec4f55f4f5421a4747be2d2
_default_hash_function	80	1	3ebcdedf8314af82cd6e669236eb14233b87a0d46080e1fab886a4ae21d93d1d
_code_0010b270	288	4	2ae2a53c5c4dcbd3f00f590b438dd87ed558fa50b7a36de8c6f797c5556f9907
_hashtable_get	176	8	78637be8a050e4aa418a96e1ac9451d87866385eca411b7bd3959079d5702aae
_hashtable_remove	496	20	7fcb1c77d930a60b35fb25f9416546bf8af41830368abff166736445d9f1a114
_code_0010b630	160	7	ab51004e09ed335edfc3983274256411f64ed97dc1a652e6ba8fbb426f4281b9
_hashtable_grow	576	27	0a7974681ab4f334bda59ada858d9aed8aa9a8c9e9b9518270dd31e1f3a7e606
_hashtable_put	192	8	c13ac7049059a5e1ed2a498f690d1f7d2893959a36d527d32748b5a5cb0ceb61

Target-owned data and ownership audit

The candidate and target define the same ten target-owned non-code sections with identical external storage class, type, value, section size, bytes, and relocations:

• the nine January assert/path/diagnostic strings;
• _default_hash_polynomial, external at offset zero of a 30-byte .data section, with the exact fifteen-word polynomial payload.

The rebuilt object additionally emits four select-any .rdata COMDATs: __real@3f800000, __real@00000000, "element_size>0", and "key". For each, the January split object contains an external undefined symbol with the same name and every code relocation resolves to the same name/addend. This is ordinary linker COMDAT pooling, not extra runtime data or an ownership mismatch. Candidate-only .drectve and .debug$S sections are compiler/linker metadata. The pre-edit and candidate ownership fingerprints are identical.

Accepted source shape and house-rule audit

The closing source change is deliberately small: initialize old_capacity_bits before old_count in hashtable_grow, and remove the now stale nonmatching comment. The ordering changes VC7's IR temporary numbering without changing the C semantics.

• Parameters remain one per line; this translation unit has no no-argument function requiring a vertically formatted void parameter.
• Every void definition ends with explicit return;; every non-void definition ends with an explicit value return.
• Public declarations use struct hashtable and the repository callback typedefs. There is no raw tag or object access in this subsystem, so typed tag_get/object_get access macros are not applicable.
• No assembly, volatile, force-inlining, packing/alignment pragma, undefined behavior, compiler-flag change, or object-byte patch is used.
• The evidence-backed early success/failure returns in hashtable_grow and hashtable_put are retained; both functions still end in an explicit return.

Preserved experiment history

The donor branch measured the final _hashtable_grow residual as a two-byte EAX/ECX permutation at the line-136 commutative assertion table->capacity_bits+growth_bits<SHORT_BITS. Operand swapping, widening casts, and polarity respelling were inert because VC7 canonicalized the expression. The preserved bounded initializer-order matrix was:

Source shape	Differing normalized bytes	Decision
old_count before old_capacity_bits	2	replaced
old_capacity_bits before old_count	0	accepted, strict exact
slots first	30	rejected
capacity last	244	rejected
elements first	255	rejected
assertion evaluated through old_capacity_bits	172	rejected

The accepted ordering gives the capacity-word reload ECX affinity and extends growth_bits through EAX, exactly matching January. Do not repeat blind operand reordering or introduce prohibited compiler controls.

Fresh campaign-base admission evidence (2026-08-20)

• A clean pre-edit regression snapshot was captured at exact base a0bad121b7b4e37335acb3ab9a7825fb99861a7a.
• The candidate object was deleted and force-rebuilt with XDK 3911.
• The hardened function sweep passed 10/10 with 2,400/2,400 padded bytes and 103/103 relocations.
• The hardened non-code/ownership sweep passed 10/10 target-owned sections, 257/257 logical bytes, and zero target-owned BSS sections.
• The fail-closed pre-admission regression check retained all nine previously exact functions, reported only _hashtable_grow as newly exact, and found zero changed nonexact siblings, data changes, or symbol-ownership changes.
• Clean full halobetacache_build and libcmt_build targets passed after 570 compilation edges.
• Consolidated semantic progress scanned 470 units and 3,604 functions, accepted 3,521 exact functions, and reported zero unit errors.
• Consolidated progress reports this unit at 10/10 functions, 2,343/2,343 meaningful code bytes, and 270/270 linked data bytes. Campaign Halo progress is 268/468 complete objects.
• The admission audit reports zero candidates and zero revocations involving this unit. Its sole contradiction is the pre-existing unrelated source/shell/shell_xbox record.
• python -m unittest discover -s tools -p "test_*.py" -v: 179/179 passed.
• git diff --check and the four-file scope/frozen-object policy audit passed.

No fuzzy percentage, semantic exception, parked credit, compiler override, or ownership waiver is used for this admission.