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CallGraphTo for C++

Displays calls made to a specified function, showing the call graph inbound to the target function.

Overview

This query identifies all call sites that invoke a named function, producing an inbound call graph. Given a target function name, it reports each caller and call location, which is useful for understanding how a function is used across the codebase.

The query accepts function names via an external predicate (targetFunction) and supports both simple and qualified name matching.

Use Cases

This query is primarily used for:

  • Finding all callers of a specific function
  • Impact analysis before modifying a function signature
  • Understanding usage patterns and entry points

Example

The following C++ code demonstrates inbound calls to targetFunc:

void targetFunc() {}              // Target function for analysis

void caller1() { targetFunc(); }
void caller2() { targetFunc(); }

Running with targetFunction = "targetFunc" produces results showing each call site with the message pattern Call to `targetFunc` from `caller1.

Output Format

The query is a @kind problem query producing rows of:

  • select call, "Call to `target` from `caller`"

References