github.com/huandu/go@v0.0.0-20151114150818-04e615e41150/test/fixedbugs/issue9355.go (about)

     1  // run
     2  
     3  // Copyright 2014 The Go Authors.  All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  package main
     8  
     9  import (
    10  	"fmt"
    11  	"os"
    12  	"os/exec"
    13  	"path/filepath"
    14  	"regexp"
    15  	"runtime"
    16  )
    17  
    18  func main() {
    19  	if runtime.Compiler != "gc" || runtime.GOOS == "nacl" {
    20  		return
    21  	}
    22  
    23  	err := os.Chdir(filepath.Join("fixedbugs", "issue9355.dir"))
    24  	check(err)
    25  
    26  	out := run("go", "tool", "compile", "-S", "a.go")
    27  	os.Remove("a.o")
    28  
    29  	// 6g/8g print the offset as dec, but 5g/9g print the offset as hex.
    30  	patterns := []string{
    31  		`rel 0\+\d t=1 \"\"\.x\+8\r?\n`,       // y = &x.b
    32  		`rel 0\+\d t=1 \"\"\.x\+(28|1c)\r?\n`, // z = &x.d.q
    33  		`rel 0\+\d t=1 \"\"\.b\+5\r?\n`,       // c = &b[5]
    34  		`rel 0\+\d t=1 \"\"\.x\+(88|58)\r?\n`, // w = &x.f[3].r
    35  	}
    36  	for _, p := range patterns {
    37  		if ok, err := regexp.Match(p, out); !ok || err != nil {
    38  			println(string(out))
    39  			panic("can't find pattern " + p)
    40  		}
    41  	}
    42  }
    43  
    44  func run(cmd string, args ...string) []byte {
    45  	out, err := exec.Command(cmd, args...).CombinedOutput()
    46  	if err != nil {
    47  		fmt.Println(string(out))
    48  		fmt.Println(err)
    49  		os.Exit(1)
    50  	}
    51  	return out
    52  }
    53  
    54  func check(err error) {
    55  	if err != nil {
    56  		fmt.Println("BUG:", err)
    57  		os.Exit(1)
    58  	}
    59  }