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runtime: mark sigInitIgnored nosplit

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The sigInitIgnored function can be called by initsig before a shared
library is initialized, before the runtime is initialized.

Fixes #27183

Change-Id: I7073767938fc011879d47ea951d63a14d1cce878
Reviewed-on: https://go-review.googlesource.com/131277
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Ian Lance Taylor 2018-08-24 11:44:55 -07:00
parent 05c02444eb
commit 97f1535285
1 changed files with 4 additions and 2 deletions
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6
src/runtime/sigqueue.go
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@ -237,8 +237,10 @@ func signal_ignore(s uint32) {
atomic.Store(&sig.ignored[s/32], i)
}
// sigInitIgnored marks the signal as already ignored. This is called at
// program start by siginit.
// sigInitIgnored marks the signal as already ignored. This is called at
// program start by initsig. In a shared library initsig is called by
// libpreinit, so the runtime may not be initialized yet.
//go:nosplit
func sigInitIgnored(s uint32) {
i := sig.ignored[s/32]
i |= 1 << (s & 31)