mirror of
https://github.com/golang/go.git
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3eadbb02af
This removes a bunch of ugly duplicate code. The end goal is to factor the disassembly code into cmd/internal/objfile too, so that pprof can use it, but one step at a time. LGTM=r, iant R=r, alex.brainman, iant CC=golang-codereviews https://golang.org/cl/149400043
82 lines
1.8 KiB
Go
82 lines
1.8 KiB
Go
// 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 objfile implements portable access to OS-specific executable files.
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package objfile
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import (
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"debug/gosym"
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"fmt"
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"os"
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)
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type rawFile interface {
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symbols() (syms []Sym, err error)
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pcln() (textStart uint64, symtab, pclntab []byte, err error)
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text() (textStart uint64, text []byte, err error)
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goarch() string
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}
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// A File is an opened executable file.
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type File struct {
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r *os.File
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raw rawFile
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}
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// A Sym is a symbol defined in an executable file.
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type Sym struct {
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Name string // symbol name
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Addr uint64 // virtual address of symbol
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Size int64 // size in bytes
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Code rune // nm code (T for text, D for data, and so on)
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Type string // XXX?
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}
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var openers = []func(*os.File) (rawFile, error){
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openElf,
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openGoobj,
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openMacho,
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openPE,
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openPlan9,
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}
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// Open opens the named file.
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// The caller must call f.Close when the file is no longer needed.
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func Open(name string) (*File, error) {
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r, err := os.Open(name)
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if err != nil {
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return nil, err
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}
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for _, try := range openers {
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if raw, err := try(r); err == nil {
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return &File{r, raw}, nil
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}
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}
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r.Close()
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return nil, fmt.Errorf("open %s: unrecognized object file", name)
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}
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func (f *File) Close() error {
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return f.r.Close()
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}
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func (f *File) Symbols() ([]Sym, error) {
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return f.raw.symbols()
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}
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func (f *File) PCLineTable() (*gosym.Table, error) {
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textStart, symtab, pclntab, err := f.raw.pcln()
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if err != nil {
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return nil, err
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}
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return gosym.NewTable(symtab, gosym.NewLineTable(pclntab, textStart))
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}
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func (f *File) Text() (uint64, []byte, error) {
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return f.raw.text()
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}
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func (f *File) GOARCH() string {
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return f.raw.goarch()
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}
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