go issue4316 源码
golang issue4316 代码
文件路径：/test/fixedbugs/issue4316.go
// run
// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Issue 4316: the stack overflow check in the linker
// is confused when it encounters a split-stack function
// that needs 0 bytes of stack space.
package main
type Peano *Peano
func makePeano(n int) *Peano {
if n == 0 {
return nil
}
p := Peano(makePeano(n - 1))
return &p
}
var countArg Peano
var countResult int
func countPeano() {
if countArg == nil {
countResult = 0
return
}
countArg = *countArg
countPeano()
countResult++
}
var s = "(())"
var pT = 0
func p() {
if pT >= len(s) {
return
}
if s[pT] == '(' {
pT += 1
p()
if pT < len(s) && s[pT] == ')' {
pT += 1
} else {
return
}
p()
}
}
func main() {
countArg = makePeano(4096)
countPeano()
if countResult != 4096 {
println("countResult =", countResult)
panic("countResult != 4096")
}
p()
}
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