function::speculate - Linux


function::speculate is a command-line tool designed for speculative execution of code snippets within a sandboxed environment. It allows developers to test the behavior of code in a controlled and isolated setting, aiding in debugging and performance optimization.


function::speculate [options] <code snippet>


  • -t, --timeout: Sets the maximum execution time for the code snippet in milliseconds. Default: 10000ms.
  • -o, --output: Specifies the output file to save the result of code execution. Default: stdout.
  • -v, --verbose: Enables verbose output, printing detailed execution logs.
  • -h, --help: Displays the command help message.


Simple execution:

function::speculate echo "Hello world!"

Execution with timeout and output file:

function::speculate -t 20000 -o out.txt 'while true; do echo "Looping..."; done'

Verbose output:

function::speculate -v 'function test() { return 1; } test();'

Common Issues

  • Timeout exceeded: The code snippet exceeded the specified execution time. Increase the --timeout option.
  • Sandbox violation: The code snippet attempted to access resources outside the sandbox. Ensure the code is self-contained and does not require external dependencies.


Integration with debuggers: function::speculate can be used in conjunction with debuggers to provide real-time code inspection during execution.

gdb -ex 'b main' -ex 'run function::speculate "printf(\"Hello world!\\n\");"'

Use in testing frameworks: function::speculate can be incorporated into testing frameworks to run isolated code tests.

pytest --speculate 'assert function::speculate("1 + 1") == 2'

Related Commands

  • python: Interpreted programming language used for prototyping and scripting.
  • sandbox: Provides an isolated execution environment for untrusted code.