mirror of https://github.com/golang/go.git
42 lines
1.1 KiB
Go
42 lines
1.1 KiB
Go
// Copyright 2011 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 objabi
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import (
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"internal/abi"
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"internal/buildcfg"
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)
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// For the linkers. Must match Go definitions.
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const (
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STACKSYSTEM = 0
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StackSystem = STACKSYSTEM
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)
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func StackLimit(race bool) int {
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// This arithmetic must match that in runtime/stack.go:{_StackGuard,_StackLimit}.
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stackGuard := 928*stackGuardMultiplier(race) + StackSystem
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stackLimit := stackGuard - StackSystem - abi.StackSmall
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return stackLimit
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}
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// stackGuardMultiplier returns a multiplier to apply to the default
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// stack guard size. Larger multipliers are used for non-optimized
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// builds that have larger stack frames or for specific targets.
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func stackGuardMultiplier(race bool) int {
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// This arithmetic must match that in runtime/internal/sys/consts.go:StackGuardMultiplier.
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n := 1
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// On AIX, a larger stack is needed for syscalls.
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if buildcfg.GOOS == "aix" {
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n += 1
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}
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// The race build also needs more stack.
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if race {
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n += 1
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}
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return n
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}
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