go clearfat 源码
golang clearfat 代码
文件路径：/test/clearfat.go
// runoutput
// Copyright 2014 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.
// Check that {5,6,8,9}g/ggen.c:clearfat is zeroing the entire object.
package main
import (
"bytes"
"fmt"
"strconv"
"strings"
)
const ntest = 1100
func main() {
var decls, calls bytes.Buffer
for i := 1; i <= ntest; i++ {
s := strconv.Itoa(i)
decls.WriteString(strings.Replace(decl, "$", s, -1))
calls.WriteString(strings.Replace("poison$()\n\tclearfat$()\n\t", "$", s, -1))
}
program = strings.Replace(program, "$DECLS", decls.String(), 1)
program = strings.Replace(program, "$CALLS", calls.String(), 1)
fmt.Print(program)
}
var program = `package main
var count int
$DECLS
func main() {
$CALLS
if count != 0 {
println("failed", count, "case(s)")
}
}
`
const decl = `
func poison$() {
// Grow and poison the stack space that will be used by clearfat$
var t [2*$]byte
for i := range t {
t[i] = 0xff
}
}
func clearfat$() {
var t [$]byte
for _, x := range t {
if x != 0 {
// println("clearfat$: index", i, "expected 0, got", x)
count++
break
}
}
}
`
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