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Use Runtime Instrumentation
- Use dynamic tracing tools to gather runtime data tailored to your hypothesis.
- Collect runtime allocations and GC sweep states to observe how values deviate during execution.
Define the Info You Need
- Knowing the exact information you wish you had helps target effective instrumentation efforts.
- Gathering excessive low-value data can hinder debugging by introducing noise and complexity.
False Lead with FS Base Bug
- Dave investigated an AMD-specific bug related to incorrectly saved FS base register in setcontext.
- Despite its curiosity and weirdness, it proved unrelated to the main memory allocator failures.