Russell Yanofsky f702a6fa7c Thread safety analysis: Improve documentation for ASSERT_CAPABILITY ...

Previous description didn't actually state the effect the attribute has on
thread safety analysis (causing analysis to assume the capability is held).

Previous description was also ambiguous about (or slightly overstated) the
noreturn assumption made by thread safety analysis, implying the assumption had
to be true about the function's behavior in general, and not just its behavior
in places where it's used. Stating the assumption specifically should avoid a
perceived need to disable thread safety analysis in places where only asserting
that a specific capability is held would be better.

Reviewed By: aaronpuchert, vasild

Differential Revision: https://reviews.llvm.org/D87629

2020-09-26 22:16:50 +02:00

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