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https://github.com/golang/go
synced 2024-11-26 15:46:54 -07:00
5f9412911b
The compiler/assembler's -S output prints relocation type numerically, which is hard to understand. Every time I need to count the relocation type constants to figure out which relocation it actually is. Print the symbolic name instead. Change-Id: I4866873bbae8b3dc0ee212609cb00280f9164243 Reviewed-on: https://go-review.googlesource.com/c/go/+/501856 TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Than McIntosh <thanm@google.com> Run-TryBot: Cherry Mui <cherryyz@google.com>
64 lines
1.3 KiB
Go
64 lines
1.3 KiB
Go
// +build !js,!wasip1,gc
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// run
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// Copyright 2014 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 main
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import (
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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"regexp"
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)
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func main() {
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err := os.Chdir(filepath.Join("fixedbugs", "issue9355.dir"))
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check(err)
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f, err := ioutil.TempFile("", "issue9355-*.o")
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if err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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f.Close()
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out := run("go", "tool", "compile", "-p=p", "-o", f.Name(), "-S", "a.go")
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os.Remove(f.Name())
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// 6g/8g print the offset as dec, but 5g/9g print the offset as hex.
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patterns := []string{
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`rel 0\+\d t=R_ADDR p\.x\+8\r?\n`, // y = &x.b
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`rel 0\+\d t=R_ADDR p\.x\+(28|1c)\r?\n`, // z = &x.d.q
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`rel 0\+\d t=R_ADDR p\.b\+5\r?\n`, // c = &b[5]
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`rel 0\+\d t=R_ADDR p\.x\+(88|58)\r?\n`, // w = &x.f[3].r
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}
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for _, p := range patterns {
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if ok, err := regexp.Match(p, out); !ok || err != nil {
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println(string(out))
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panic("can't find pattern " + p)
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}
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}
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}
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func run(cmd string, args ...string) []byte {
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out, err := exec.Command(cmd, args...).CombinedOutput()
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if err != nil {
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fmt.Println(string(out))
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fmt.Println(err)
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os.Exit(1)
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}
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return out
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}
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func check(err error) {
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if err != nil {
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fmt.Println("BUG:", err)
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os.Exit(1)
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}
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}
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