function::fastcall - Linux


The fastcall command is a custom Linux command designed to streamline the process of debugging large or complex functions. It allows users to quickly call functions and inspect their behavior by capturing stack traces, identifying memory leaks, and monitoring performance metrics.


function::fastcall <function_name> [args] [options]


  • -s, –stack-trace: Capture and print a stack trace upon function execution.
  • -m, –memory-leak: Check for memory leaks during function execution and report any detected leaks.
  • -t, –time: Time the function execution and display the execution time.
  • -p, –perf: Monitor performance metrics such as CPU and memory usage during function execution.
  • -d, –debug: Enable verbose debug output for advanced troubleshooting.
  • –help: Display help information and usage instructions.


  • Basic usage:
fastcall my_function
  • Capture stack trace:
fastcall -s my_function
  • Check for memory leaks:
fastcall -m my_function
  • Time function execution:
fastcall -t my_function
  • Monitor performance metrics:
fastcall -p my_function

Common Issues

  • Function not found: Ensure the function exists and is accessible from the current environment.
  • Memory leak detection: False positives can occur. Use the --debug flag to investigate potential false positives.
  • Performance monitoring: Some metrics may not be supported by the system.


The fastcall command can be integrated into:

  • Development pipelines for automated function testing.
  • Debugging tools to enhance troubleshooting capabilities.
  • Performance monitoring systems to identify performance bottlenecks.

Related Commands

  • gdb: A popular debugger with advanced debugging capabilities.
  • strace: A system call tracer that can capture function calls and system interactions.
  • valgrind: A memory leak detector and profiling tool.