find-ccsplayercontroller-inventoryupdatethink

name	find-CCSPlayerController_InventoryUpdateThink
description	Find and identify the CCSPlayerController_InventoryUpdateThink wrapper function in CS2 binary using IDA Pro MCP. Use this skill when reverse engineering CS2 server.dll or server.so to locate the InventoryUpdateThink think function wrapper by searching for the think function name string in schema registration and tracing through the schema structure to find the wrapper function pointer.

Find CCSPlayerController_InventoryUpdateThink

Locate CCSPlayerController_InventoryUpdateThink (the think function wrapper) in CS2 server.dll or server.so using IDA Pro MCP tools.

Background

Think functions in Source 2 are registered through a schema system. The wrapper function pointer is stored in a schema structure, not directly referenced by the string. This requires:

1. Finding the string
2. Locating the schema initialization function
3. Reading the structure to find the wrapper function pointer

Method

1. Search for the think function name string

mcp__ida-pro-mcp__find_regex pattern="InventoryUpdateThink"

2. Get cross-references to the string

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

3. Decompile the referencing function (schema init)

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

Look for the pattern:

qword_XXXXXX = sub_1F007F0("CCSPlayerController", "InventoryUpdateThink");

Note: sub_1F007F0 is a string concatenation function, NOT the actual think function.

4. Find the wrapper function pointer in schema structure

The schema structure stores the wrapper function pointer at a fixed offset from the name string pointer. Read bytes around the name storage location:

mcp__ida-pro-mcp__py_eval code="""
import ida_bytes

# Address where the name string pointer is stored (qword_XXXXXX from step 3)
name_storage_addr = <name_storage_addr>

# Read 128 bytes starting from offset -0x38 to find the wrapper pointer
# The wrapper pointer is typically at offset +0x28 from the name storage
raw_bytes = ida_bytes.get_bytes(name_storage_addr - 0x38, 128)

# Look for function pointers (addresses in .text segment range)
for i in range(0, len(raw_bytes) - 7, 8):
    ptr = int.from_bytes(raw_bytes[i:i+8], 'little')
    if 0x900000 < ptr < 0x2100000:  # Typical .text range for server.so
        print(f"Potential function pointer at offset {hex(i - 0x38)}: {hex(ptr)}")
"""

5. Verify and decompile the wrapper function

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

The wrapper should look like:

const char *__fastcall sub_XXXXXX(__int64 a1)
{
  return InventoryUpdateThink(*(_QWORD *)(a1 + 2744));
}

Where:

• a1 is CCSPlayerController*
• Offset 2744 (0xAB8) retrieves a member pointer
• Calls the real InventoryUpdateThink function

6. Rename the wrapper function

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

7. Generate unique signature

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

8. Write IDA analysis output as YAML

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

Required parameters:

• func_name: CCSPlayerController_InventoryUpdateThink
• func_addr: The wrapper function address from step 5
• func_sig: The validated signature from step 7

Schema Structure Pattern

The CCSPlayerController schema registers multiple think functions:

Think Function Name	Purpose
PlayerForceTeamThink	Force team assignment logic
ResetForceTeamThink	Reset force team state
ResourceDataThink	Resource data updates
InventoryUpdateThink	Inventory synchronization

Function Characteristics

• Wrapper Size: ~12 bytes (very small thunk function)
• Pattern: mov rdi, [rdi+offset]; jmp RealFunction
• Member Offset: 0xAB8 (2744 decimal) - may change between versions

Assembly Pattern

48 8B BF B8 0A 00 00    mov  rdi, [rdi+0xAB8]   ; Get member pointer
E9 XX XX XX XX          jmp  InventoryUpdateThink ; Tail call

Output YAML Format

The output YAML filename depends on the platform:

• server.dll → CCSPlayerController_InventoryUpdateThink.windows.yaml
• server.so / libserver.so → CCSPlayerController_InventoryUpdateThink.linux.yaml

func_va: 0x132C520        # Virtual address - changes with game updates
func_rva: 0x132C520       # Relative virtual address (VA - image base)
func_size: 0xC            # Function size in bytes (typically 12 for wrapper)
func_sig: 48 8B BF B8 0A 00 00 E9  # Unique byte signature

Notes

• This is NOT a virtual function, so no vtable information is needed
• The wrapper is a simple thunk that retrieves a member and tail-calls the real function
• The signature includes the member offset which may change if CCSPlayerController layout changes