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

libs/libcmt/toupper.obj exact-match ledger

This atomic lane starts from campaign commit 4a925e0a. At lane start the object was MISSING at config index 822, absent from config/parked.json, absent from every Git ref and worktree, and explicitly cleared by the other active agents. The January split target exists and contains two functions.

Plain-English behavior

The small _toupper helper converts one known lowercase character to its uppercase ASCII counterpart by subtracting 32. The public toupper routine first asks whether the input is lowercase. For a multibyte locale it calls the CRT classification routine; otherwise it reads the lowercase flag from the current character-type table. It changes the character only when that flag is present. The object owns no runtime data.

Provenance and January inventory

The XDK 3911 libcmt.lib archive has SHA-256 60aa4c87c97eeb6662b31d9d37cf3caba1afabaec72c47b090e7a0ce8b632f55. Its obj\i386\toupper.obj member has SHA-256 967f0ba128fa979b158b8e070cb99458694e568015dc7d55e6f9f9364773ba4b, an August 11 2001 timestamp, compiler identifier 0x001c2426, ordinary C CodeView/debug sections, and the two external C functions __toupper and _toupper. It is direct XDK CRT C provenance rather than a vendor-assembly unit.

The archive member is already strict-exact to the January runtime sections:

• __toupper: 0x8/0x8, zero relocations, normalized SHA-256 25c795932cd06738a4dd900ee5b977650a62f2ff8b951419a292e2c6dfa1f4fb;
• _toupper: 0x31/0x31, three relocations, normalized SHA-256 29caaad8208ac2eebd3e186e988cd7247c0ac1091bb0cade8153b8de09c0f394;
• _toupper relocates at +0x02 to ___mb_cur_max, at +0x12 to __isctype, and at +0x1b to __pctype, all with addend zero;
• both are external, one-byte-aligned, pick-no-duplicates .text COMDATs;
• there are no target-owned .rdata, .data, or .bss sections and no aliases.

The adjacent admitted tolower.obj is the trustworthy source-topology donor: its two routines have the same branch and classification structure with the opposite case flag and opposite 32-character adjustment. January and the XDK member remain authoritative for the uppercase constants and exact bytes.

Experiment matrix

ID	Source shape	Size T/B	Relocs T/B	Base hash	First divergence	Object result	Decision
E01	Readable mirror of admitted tolower.c, using lowercase flag 2 and 'A' - 'a'	helper 0x8/0x8; public 0x31/0x31	0/0; 3/3	helper 25c795932cd0...; public 29caaad8208a...	none	2/2 functions and all ownership exact	accepted on first build

No alternate spellings are justified unless E01 fails. The primary archive member and January target prove the code graph, while the exact sibling proves the readable project topology. Any further experiment will change one source factor, be measured here, and be reverted unless it improves the strict whole- object result.

Strict verification

XDK 3911 CL 13.00.9254.1 compiled the production source with the configured libcmt flags /O1 /Gy /I"xbox/include". The hardened comparator reports section_infos_equal for both routines. Their sizes, normalized hashes, and relocation details are exactly the values recorded above. Independent COFF inspection also confirms external function storage class, one-byte alignment, pick-no-duplicates COMDAT selection, and the same three undefined external references. The extra candidate .drectve and CodeView sections are discardable compiler metadata, not linked runtime ownership. A clean forced rebuild produced the same strict result.

The full halobetacache_build and libcmt_build pass. Regenerated progress reports 314/833 objects overall, 267/468 Halo objects, and 47/212 libcmt objects. Libcmt now has 50/476 exact functions and 2,734/55,015 exact code bytes. Relative to this lane's fixed baseline, toupper.obj contributes one object, two functions, and 57 code bytes; data is unchanged. The semantic audit scans 417 units, evaluates 3,487 functions, accepts 3,403 exact functions, and reports zero unit errors. The object-admission audit finds no uncredited candidate and no revocation; its one contradiction is the unrelated pre-existing source/shell/shell_xbox entry. All 179 tooling tests pass.

The post-commit fail-closed per-unit regression snapshot/check passes: __toupper and _toupper are both still_exact, with no failures, warnings, changed non-exact siblings, unexpected new matches, or ownership changes.

House/Berth and bug audit

The candidate is direct readable C with explicit types and named parameters. It contains no assembly, volatile, forced inlining, undefined behavior, byte forcing, opaque code-generation cast, raw field offset, alignment trick, compiler-flag exception, or comparator waiver. The routine implements normal CRT case conversion; no January behavioral defect is present, so no original- bug annotation is needed.