find-CBasePlayerController_ProcessUsercmds

Find CBasePlayerController_ProcessUsercmds

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

Method

1. Search for the debug format string:

   mcp__ida-pro-mcp__find_regex pattern="Recv usercmd %d"
   

2. Get cross-references to the string:

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

3. There should be exactly one referencing function. Decompile it:

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

4. Confirm the function matches the expected pattern (see below), then rename it:

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

5. Generate and validate unique signature:

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

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

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

   Required parameters:

   • func_name: CBasePlayerController_ProcessUsercmds
   • func_addr: The function address from step 3
   • func_sig: The validated signature from step 5

   Note: This is NOT a virtual function, so no vtable parameters are needed.

Signature Pattern

The function contains a debug logging call with the format string:

%sRecv usercmd %d.  Margin:%5.1fms net +%2d queue =%5.1f total

This string is unique in the binary — only one function references it.

Function Characteristics

• Type: Regular member function (NOT virtual)
• Parameters: (CBasePlayerController* this, usercmd_array, num_cmds, paused_flag, margin)
• Behavior:
  • Resolves the controller's pawn entity via entity handle lookup
  • Validates the pawn is alive before processing
  • Iterates over received user commands, tracking sequence numbers and timing margins
  • Logs debug info with the %sRecv usercmd format string when channel logging is enabled
  • Calls into pawn movement processing for each valid command
  • Updates the controller's last processed command tick

Output YAML Format

The output YAML filename depends on the platform:

• server.dll -> CBasePlayerController_ProcessUsercmds.windows.yaml
• server.so / libserver.so -> CBasePlayerController_ProcessUsercmds.linux.yaml