Debug Lldb

Overview

Capture stack traces from a live process to explain stalls and freezes, then triage for deadlocks, blocking IPC, or tight loops. Prefer repeat sampling so the hang signature is obvious.

Workflow

1) Identify the process

• Use ps/pgrep to get the PID.
• Prefer the foreground app PID (not the dev server).

2) Capture backtraces (fast path)

• Use the bundled script:
  • scripts/collect_stacks.sh --pid <pid> --out /tmp/hang --repeat 3 --sleep 0.5
  • Or by name: scripts/collect_stacks.sh --name "<process-substring>" --out /tmp/hang
• Run in a separate terminal if the current one is interactive with the hung app.