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Source file test/clearfat.go

Documentation: test

  // 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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