Gunosy.go#3 debug

debugパッケージの資料になります。

Transcript

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15. package main ! import ( "debug/elf" "debug/gosym" "fmt" "log" "os" )
16. func parse(file string, f *elf.File) *gosym.Table { sec := f.Section(".gosymtab") symdat, err := sec.Data() defer f.Close() if err != nil { log.Fatalf("reading %s gosymtab: %v", file, err) } pclndat, err := f.Section(".gopclntab").Data() if err != nil { log.Fatalf("reading %s gopclntab: %v", file, err) } ! pcln := gosym.NewLineTable(pclndat, f.Section(".text").Addr) tab, err := gosym.NewTable(symdat, pcln) if err != nil { log.Fatalf("parsing %s gosymtab: %v", file, err) } ! return tab } &-'ܗ͔ࣜΒ(P ͷγϯϘϧΛ୳͢ -JOF
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17. func main() { fn := os.Args[1] f, err := elf.Open(os.Args[1]) if err != nil { log.Fatal(err) } table := parse(fn, f) ! //func_ := table.LookupFunc("os.Open") ! for _, f := range table.Funcs { fmt.Println(f.Name) for _, p := range f.Params { fmt.Println("\t" + p.Name) } } } -PPLVQ'VOD Λࢀߟʹͨ͠ } ಛఆͷ'VOD
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