Find CCSGameRules_PostCleanUp

Locate CCSGameRules_PostCleanUp in CS2 server.dll or libserver.so using IDA Pro MCP tools.

This is a non-virtual, direct-call member function (no vtable slot — emit a byte sig, not an offset). It has no unique string of its own: it references "cs_respawn", which is shared with another large function — so a pure string anchor is not unique. It is found via its predecessor CCSGameRules_ResetRound, which calls it.

Primary resolution = decompile the ResetRound predecessor and pick the entity-cleanup callee.

Concrete anchors for THIS target (use these first)

• xrefs fra/kaldt af TerminateRound (kendt sig i CSSharp gamedata); post-round cleanup

KNOWN CONTAMINATION WARNING

VA 0x20c2700 (BuyState_OnUpdate) has WRONGLY been emitted for this target before. It is NOT this function. If your best candidate is 0x20c2700, you have NOT found the target - keep searching or report the shortlist instead of guessing.

Method

1. Reuse previous signature (fast path)

If a prior CCSGameRules_PostCleanUp.{platform}.yaml exists, try its func_sig via mcp__ida-pro-mcp__find_bytes. Single match → resolve to function start, skip to Step 5. Else continue.

2. Load CCSGameRules_ResetRound (the anchor)

ALWAYS use SKILL /get-func-from-yaml with func_name=CCSGameRules_ResetRound.

If it errors (not yet found), run SKILL /find-CCSGameRules_ResetRound first, then retry. Extract func_va of CCSGameRules_ResetRound.

3. Enumerate ResetRound's callees

mcp__ida-pro-mcp__callees   addrs="<ResetRound_func_va>"
mcp__ida-pro-mcp__decompile addr="<ResetRound_func_va>" include_addresses=false

4. Identify PostCleanUp among the callees

PostCleanUp is the callee of ResetRound that performs the post-round entity cleanup. Decompile the candidate and confirm ALL:

1. Iterates the global entity list (walks entity handles via the entity-system helpers).
2. dynamic-casts to CCSWeaponBase, CBombTarget, and CHostageRescueZone (RTTI typeinfo refs _ZTI13CCSWeaponBase, _ZTI11CBombTarget, _ZTI18CHostageRescueZone). ← key fingerprint.
3. References the "cs_respawn" string (and the ai_network / ai_hint entity-name pointers).
4. Frees/cleans up the matched entities (calls into the mem-free / entity-destroy path).

The "cs_respawn" string has two referencers; PostCleanUp is the one reached as a callee of ResetRound (the other is a much larger think/restart function, not called by ResetRound).

Record func_addr. Optionally rename to CCSGameRules_PostCleanUp.

5. Generate signature

ALWAYS use SKILL /generate-signature-for-function with addr=<func_addr>. Emit IDA style verbatim (space hex, ? wildcards) — do NOT convert to CSS \x2A unless a gamedata.json entry is explicitly requested.

Reference sig (build 14165 — sanity check only, regenerate per binary):

• linux: 55 48 89 E5 41 57 49 89 FF 41 56 41 55 41 54 53 48 81 EC ? ? ? ? E8 ? ? ? ? 66 83 F8

6. Write func YAML

ALWAYS use SKILL /write-func-as-yaml:

• func_name: CCSGameRules_PostCleanUp
• func_addr: <func_addr>
• func_sig: validated sig from step 5

Function Characteristics

• Linkage: non-virtual, direct-call (no vtable entry)
• Binary: server.dll / libserver.so
• Caller: CCSGameRules_ResetRound (and one other round-restart path)
• Distinguishing trait: entity-list walk + dynamic_cast to CCSWeaponBase/CBombTarget/ CHostageRescueZone + "cs_respawn" reference

Discovery Strategy (why this is stable across updates)

1. ResetRound is the durable anchor (found via the unique "GMR_ResetRound\n" string).
2. PostCleanUp is pinned as ResetRound's entity-cleanup callee — deterministic, not address-based.
3. The final byte sig is regenerated per binary, so it self-heals each game update once the functions are re-resolved.

Preprocessor pipeline equivalent

find-CCSGameRules_ResetRound        [xref_strings "GMR_ResetRound\n"]
 -> find-CCSGameRules_PostCleanUp    [LLM_DECOMPILE ResetRound, entity-cleanup callee]

Reference YAML lives in references/server/CCSGameRules_ResetRound.{platform}.yaml.

Output YAML Format

• server.dll -> CCSGameRules_PostCleanUp.windows.yaml
• libserver.so -> CCSGameRules_PostCleanUp.linux.yaml