find-CBaseFilter_InputTestActivator

Find CBaseFilter_InputTestActivator

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

Method

1. Search for the string: mcp__ida-pro-mcp__find_regex pattern="InputTestActivator"
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 the CBaseFilter_InputTestActivator function:
   • In the decompiled code, look for the following pattern where entity input descriptors are being registered: off_XXXXXXXX = "Negated"; word_XXXXXXXXX = 1; off_XXXXXXXX = "InputTestActivator"; off_XXXXXXXX = "TestActivator"; off_XXXXXXXX = sub_XXXXXXXXXX; // This is CBaseFilter_InputTestActivator
   • The function pointer assigned right after the "TestActivator" string assignment is CBaseFilter_InputTestActivator.
   • Decompile that function pointer target to verify it is the correct function.

• Rename the function: mcp__ida-pro-mcp__rename batch={"func": [{"addr": "<function_addr>", "name": "CBaseFilter_InputTestActivator"}]}
• Generate and validate unique signature: ALWAYS Use SKILL /generate-signature-for-function to generate a robust and unique signature for the function.
• 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: CBaseFilter_InputTestActivator
  • func_addr: The function address from step 4
  • func_sig: The validated signature from step 6

String References

The function is located by finding the entity input descriptor registration that references:

• "InputTestActivator" - the input name
• "TestActivator" - the display name
• "Negated" - a nearby field in the same descriptor block

Function Characteristics

• Type: Entity input handler for CBaseFilter
• Parameters: (this, inputdata) where this is CBaseFilter pointer, inputdata is the input event data
• Purpose: Handles the TestActivator input on filter entities, testing whether an activator passes the filter

Output YAML Format

The output YAML filename depends on the platform:

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