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cmd/internal/objabi, internal/runtime: increase nosplit limit on OpenBSD

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OpenBSD is bumping up against the nosplit limit, and openbsd/ppc64
is over it. Increase StackGuardMultiplier on OpenBSD, matching AIX.

Change-Id: I61e17c99ce77e1fd3f368159dc4615aeae99e913
Reviewed-on: https://go-review.googlesource.com/c/go/+/632996
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Damien Neil <dneil@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
Damien Neil 2024-12-02 12:45:55 -08:00 committed by Gopher Robot
parent ea86737810
commit 4da905bcf0
3 changed files with 5 additions and 5 deletions
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4
src/cmd/internal/objabi/stack.go
View File

@ -20,8 +20,8 @@ func StackNosplit(race bool) int {
func stackGuardMultiplier(race bool) int {
// This arithmetic must match that in internal/runtime/sys/consts.go:StackGuardMultiplier.
n := 1
// On AIX, a larger stack is needed for syscalls.
if buildcfg.GOOS == "aix" {
// On AIX and OpenBSD, a larger stack is needed for syscalls.
if buildcfg.GOOS == "aix" || buildcfg.GOOS == "openbsd" {
n += 1
}
// The race build also needs more stack.

4
src/internal/runtime/sys/consts.go
View File

@ -9,10 +9,10 @@ import (
"internal/goos"
)
// AIX requires a larger stack for syscalls.
// AIX and OpenBSD require a larger stack for syscalls.
// The race build also needs more stack. See issue 54291.
// This arithmetic must match that in cmd/internal/objabi/stack.go:stackGuardMultiplier.
const StackGuardMultiplier = 1 + goos.IsAix + isRace
const StackGuardMultiplier = 1 + goos.IsAix + goos.IsOpenbsd + isRace
// DefaultPhysPageSize is the default physical page size.
const DefaultPhysPageSize = goarch.DefaultPhysPageSize

2
test/nosplit.go
View File

@ -1,6 +1,6 @@
// run
//go:build !nacl && !js && !aix && !wasip1 && !gcflags_noopt && gc
//go:build !nacl && !js && !aix && !openbsd && !wasip1 && !gcflags_noopt && gc
// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style