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runtime: make traceClockNow nosplit

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It's called from exitsyscall, which is nosplit.

Change-Id: I3f5f92e044497a88a72c1870beb2bdd15c4263c4
Reviewed-on: https://go-review.googlesource.com/c/go/+/496517
Auto-Submit: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Michael Anthony Knyszek 2023-05-19 19:39:28 +00:00 committed by Gopher Robot
parent a1a048a8ab
commit e6fb1905cb
1 changed files with 4 additions and 0 deletions
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4
src/runtime/trace.go
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@ -1786,6 +1786,10 @@ type traceTime uint64
// traceClockNow returns a monotonic timestamp. The clock this function gets
// the timestamp from is specific to tracing, and shouldn't be mixed with other
// clock sources.
//
// nosplit because it's called from exitsyscall, which is nosplit.
//
//go:nosplit
func traceClockNow() traceTime {
return traceTime(cputicks() / traceTimeDiv)
}