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e629cd0f88
Fixes #10450 runtime.cputicks is called from runtime.exitsyscall and must not split the stack. cputicks is implemented in several ways and the NOSPLIT annotation was missing from a few of these. Change-Id: I5cbbb4e5888c5d298fe2fef240782d0e49f59af8 Reviewed-on: https://go-review.googlesource.com/8939 Reviewed-by: Aram Hăvărneanu <aram@mgk.ro>
21 lines
569 B
Go
21 lines
569 B
Go
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package runtime
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const (
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_AT_NULL = 0
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_AT_RANDOM = 25 // introduced in 2.6.29
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)
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var randomNumber uint32
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//go:nosplit
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func cputicks() int64 {
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// Currently cputicks() is used in blocking profiler and to seed fastrand1().
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// nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
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// randomNumber provides better seeding of fastrand1.
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return nanotime() + int64(randomNumber)
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}
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