objc-locking-queue-audit

Audit Objective-C source files for lock and dispatch-queue concurrency issues.

Updated Jul 26, 2026
One-click install
npx skills add https://github.com/jvalinsky/garazyk --skill objc-locking-queue-audit
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: objc-locking-queue-audit
Source: https://github.com/jvalinsky/garazyk/tree/main/skills/objc-locking-queue-audit
Command: npx skills add https://github.com/jvalinsky/garazyk --skill objc-locking-queue-audit

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill helps identify and prevent common concurrency bugs in Objective-C code, such as lock imbalances, potential deadlocks from synchronous dispatches, and incorrect queue assertions, leading to more robust and stable applications.

Core Features & Use Cases

  • Lock/Unlock Imbalance Detection: Flags instances where locks are acquired but not released across all code paths.
  • Deadlock Risk Analysis: Identifies risky patterns like synchronous dispatching to the main queue or between interdependent queues, especially when locks are held.
  • Queue Ownership Verification: Checks for proper use of dispatch_assert_queue to ensure state is accessed only on its designated queue.
  • Use Case: When reviewing a complex multithreaded feature, use this Skill to quickly pinpoint potential race conditions and deadlocks before they manifest in production.

Quick Start

Run the locking and queue contract scan script on the current directory and output the results to /tmp/objc-locking-queue-audit.

Frequently Asked Questions about objc-locking-queue-audit

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I audit Objective-C code for lock and dispatch queue concurrency issues?

To audit Objective-C code for lock and dispatch queue concurrency issues, run static analysis scripts that scan source files for lock/unlock imbalances, synchronous dispatch deadlock risks, and missing queue assertions.

What causes a dispatch queue deadlock in Objective-C?

A dispatch queue deadlock in Objective-C is caused by risky patterns like synchronous dispatching to the main queue or between interdependent queues, especially when locks are held. Static analysis can identify these potential deadlocks.

How do I detect lock unlock imbalances in Objective-C source files?

To detect lock unlock imbalances in Objective-C source files, use static analysis scripts that flag instances where locks are acquired but not released across all code paths to prevent concurrency bugs.

Can I check for missing dispatch queue assertions in Objective-C automatically?

Yes, you can check for missing dispatch queue assertions in Objective-C automatically by running a contract scan script that verifies proper use of dispatch_assert_queue to ensure state is accessed only on its designated queue.

What is the best way to prevent race conditions in Objective-C multithreaded features?

The best way to prevent race conditions in Objective-C multithreaded features is to perform static code audits that pinpoint cross-queue state access and lock contract violations before they manifest in production.

Are there limitations to static analysis for Objective-C concurrency bugs?

Static analysis for Objective-C concurrency bugs is limited to identifying specific known patterns like lock imbalances and synchronous dispatch risks, and may not catch complex runtime race conditions or dynamic cross-queue access issues.