[Concurrency] Add tracing for major operations in the concurrency runtime. #40070
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stdlib/public/Concurrency/Actor.cpp
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| concurrency::trace::actor_state_changed( \ | ||
| this, newState.FirstJob.getRawJob(), \ | ||
| newState.FirstJob.needsPreprocessing(), \ | ||
| newState.FirstJob.isOverride(), newState.Flags.getOpaqueValue()); \ |
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Is there a goal that tracing makes any sense to anyone without knowledge of the current runtime implementation?
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Not at this level. The goal is to get the info out in a compact and fast manner, and then interpreting it into something more sensible for a human reader is up to whatever receives it.
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…time. Each trace point is declared as a function in the new `Tracing.h` header. These functions are called from the appropriate places in the concurrency runtime. On Darwin, an implementation of these functions is provided which uses the `os/signpost.h` API to emit signpost events/intervals. When the signpost API is not available, no-op stub implementations are provided. Implementations for other OSes can be provided by providing implementations of the trace functions for that OS. rdar://81858487
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Each trace point is declared as a function in the new
Tracing.hheader. These functions are called from the appropriate places in the concurrency runtime.On Darwin, an implementation of these functions is provided which uses the
os/signpost.hAPI to emit signpost events/intervals.When the signpost API is not available, no-op stub implementations are provided. Implementations for other OSes can be provided by providing implementations of the trace functions for that OS.
rdar://81858487