Debugging and Instruments

Diagnose crashes, memory leaks, retain cycles, main thread hangs, and performance bottlenecks in iOS apps using LLDB, Memory Graph Debugger, and Instruments. Covers breakpoint workflows, memory graph analysis, hang detection, build failure triage, and Instruments profiling for CPU, memory, energy, and network.

Contents

• Symptom Routing
• LLDB Debugging
• Memory Debugging
• Hang Diagnostics
• Build Failure Triage
• Instruments Overview
• Common Mistakes
• Review Checklist
• References

Symptom Routing