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

purevirt.obj exact-match log

Plain-English behavior

This CRT handler reports runtime error 25 when a pure virtual method is called. It owns no data.

Provenance and verification

• January target: one nine-byte cdecl function, with one REL32 relocation to __amsg_exit.
• Compiler: XDK 3911 CL 13.00.9254.1 with the libcmt project's unchanged /O1 /Gy flags.
• The readable call plus explicit final return; must reproduce push 25; call _amsg_exit; pop ecx; ret, including relocation identity.
• No assembly, volatile, forced inlining, undefined behavior, byte patch, or compiler-flag change is used.

Strict measurements

The prior source was used only as a lead and rebuilt independently from campaign tip 9ad8f126 with XDK 3911. The fresh result is strict exact:

• code: 9/9 bytes
• relocations: 1/1
• normalized SHA-256, both sides: f10173af9b0783d23271b12acf8a48b16dcffe6e64befbb3de29911941eb5d23
• relocation: +0x3, IMAGE_REL_I386_REL32, __amsg_exit + 0
• section_infos_equal: true

The target and candidate each expose one external __purecall function at offset zero with COFF function type 0x20 and storage class 2. The target owns no .rdata, .data, or .bss; the candidate adds none. Compiler debug and directive sections are non-runtime metadata.

House/Berth audit

• The implementation names the runtime operation directly instead of hiding it behind a wrapper or magic address.
• The explicit void prototype and final return; follow project style and reproduce the target's one epilogue.
• Error number 25 is the documented CRT pure-virtual-call runtime error, not an invented layout or codegen constant.
• No assembly, volatile, undefined behavior, forced inlining, byte forcing, alignment directive, flag change, or comparator/semantic exception exists.
• There is no original-game bug to annotate in this one-call CRT handler.

Before admission, the full Halo and libcmt builds, semantic/progress audits, clean per-unit regression snapshot/check, and all 179 tool tests must pass.