Call Graph
A call graph is a directed graph that represents the calling relationships between subroutines (e.g., functions, methods, or procedures) in a computer program. It visualizes which functions call which other functions, helping developers understand program structure, control flow, and dependencies. This concept is widely used in software analysis, debugging, optimization, and security assessments.
Developers should learn about call graphs when performing static code analysis, optimizing performance by identifying bottlenecks, or ensuring code security through vulnerability detection. They are essential for tasks like refactoring legacy code, understanding complex codebases, and implementing tools for program slicing or dead code elimination. In practice, call graphs are used in compilers, IDEs, and specialized analysis tools to improve software quality and maintainability.