find-csource1legacygameeventgamesystem-clientpostdataupdate

name	find-CSource1LegacyGameEventGameSystem_ClientPostDataUpdate
description	Find and identify CSource1LegacyGameEventGameSystem_ClientPostDataUpdate function in CS2 client binary using IDA Pro MCP. CSource1LegacyGameEventGameSystem_ClientPostDataUpdate is located via the "CNetworkGameClient::OnSource1Source1LegacyGameEvent: UnserializeKeyValue failed." string reference. It is a virtual function in the CSource1LegacyGameEventGameSystem vtable. Trigger: CSource1LegacyGameEventGameSystem_ClientPostDataUpdate, ClientPostDataUpdate, OnSource1Source1LegacyGameEvent
disable-model-invocation	true

CSource1LegacyGameEventGameSystem_ClientPostDataUpdate Location Workflow

Overview

Locate the virtual function CSource1LegacyGameEventGameSystem_ClientPostDataUpdate in CS2 client binary. This function references the string "CNetworkGameClient::OnSource1Source1LegacyGameEvent: UnserializeKeyValue failed." and is a virtual function in the CSource1LegacyGameEventGameSystem vtable.

Location Steps

1. Search for Signature String

Use find_regex to search for the CNetworkGameClient::OnSource1Source1LegacyGameEvent: UnserializeKeyValue failed. string:

mcp__ida-pro-mcp__find_regex(pattern="CNetworkGameClient::OnSource1Source1LegacyGameEvent: UnserializeKeyValue failed.")

2. Find CSource1LegacyGameEventGameSystem_ClientPostDataUpdate via Cross-References

Use xrefs_to on the string address to find the function that references it:

mcp__ida-pro-mcp__xrefs_to(addrs="<string_addr>")

There may be multiple functions referencing this string. The target function is the one that has no more string references than "CNetworkGameClient::OnSource1Source1LegacyGameEvent: UnserializeKeyValue failed." — i.e., it should have minimal or only this one string reference.

3. Rename CSource1LegacyGameEventGameSystem_ClientPostDataUpdate

mcp__ida-pro-mcp__rename(batch={"func": {"addr": "<ClientPostDataUpdate_addr>", "name": "CSource1LegacyGameEventGameSystem_ClientPostDataUpdate"}})

4. Load CSource1LegacyGameEventGameSystem VTable and Get VTable Index

ALWAYS Use SKILL /get-vtable-from-yaml with class_name=CSource1LegacyGameEventGameSystem

If the skill returns an error, STOP and report to user.

Find CSource1LegacyGameEventGameSystem_ClientPostDataUpdate address in vtable_entries to determine vfunc_index.

5. Generate Signature

ALWAYS Use SKILL /generate-signature-for-function to generate a robust and unique signature for CSource1LegacyGameEventGameSystem_ClientPostDataUpdate.

6. Write YAML Output

ALWAYS Use SKILL /write-vfunc-as-yaml to write the analysis results for CSource1LegacyGameEventGameSystem_ClientPostDataUpdate.

Required parameters:

• func_name: CSource1LegacyGameEventGameSystem_ClientPostDataUpdate
• func_addr: The function address from step 2
• func_sig: The validated signature from step 5

VTable parameters:

• vtable_name: CSource1LegacyGameEventGameSystem
• vfunc_offset: calculated from vfunc_index * 8
• vfunc_index: from step 4

Function Characteristics

CSource1LegacyGameEventGameSystem_ClientPostDataUpdate

• Virtual function in CSource1LegacyGameEventGameSystem vtable
• References the string CNetworkGameClient::OnSource1Source1LegacyGameEvent: UnserializeKeyValue failed.
• Handles source1 legacy game event processing during client post data update

Output YAML Files

• CSource1LegacyGameEventGameSystem_ClientPostDataUpdate.windows.yaml / .linux.yaml