find-CSpawnGroupMgrGameSystem_GetSpawnGroups

Find CSpawnGroupMgrGameSystem_GetSpawnGroups

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

Method

1. Search for the format string:

   mcp__ida-pro-mcp__find_regex pattern="%d spawn groups"
   

2. Get cross-references to the string:

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

3. Decompile the referencing function:

   mcp__ida-pro-mcp__decompile addr="<function_addr>"
   

4. Identify CSpawnGroupMgrGameSystem_GetSpawnGroups by looking for this code pattern in the decompiled function:

   sub_XXXXX(a1, &v_count);
   IsChannelEnabled = LoggingSystem_IsChannelEnabled(..., 2LL);
   v4 = v_count;
   if ( IsChannelEnabled )
     LoggingSystem_Log(..., 2LL, "%d spawn groups:\n", v_count);
   

   The sub_XXXXX(a1, &v_count) call immediately before the "%d spawn groups:\n" log is CSpawnGroupMgrGameSystem_GetSpawnGroups.

5. Rename the function:

   mcp__ida-pro-mcp__rename batch={"func": [{"addr": "<GetSpawnGroups_addr>", "name": "CSpawnGroupMgrGameSystem_GetSpawnGroups"}]}
   

6. Generate and validate unique signature:

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

7. Write IDA analysis output as YAML beside the binary:

   ALWAYS Use SKILL /write-func-as-yaml to write the analysis results for CSpawnGroupMgrGameSystem_GetSpawnGroups.

   Required parameters:

   • func_name: CSpawnGroupMgrGameSystem_GetSpawnGroups
   • func_addr: The function address from step 5
   • func_sig: The validated signature from step 6

Signature Pattern

The function is called right before a logging call with format string:

%d spawn groups:\n

Source file: game\shared\spawngroupmgrgamesystem.cpp

Function Characteristics

• Parameters: (this, &out_spawn_group_ids) where this is CSpawnGroupMgrGameSystem pointer, out_spawn_group_ids is a pointer to an output structure receiving spawn group count and ID array
• Purpose: Retrieves the list of spawn group IDs managed by the spawn group manager game system
• Not a virtual function: This is a regular member function, no vtable lookup needed

Output YAML Format

The output YAML filename depends on the platform:

• server.dll → CSpawnGroupMgrGameSystem_GetSpawnGroups.windows.yaml
• server.so → CSpawnGroupMgrGameSystem_GetSpawnGroups.linux.yaml