132 lines
2.4 KiB
Go
132 lines
2.4 KiB
Go
// 10 may 2015
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package main
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import (
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"fmt"
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"os"
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"bufio"
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"debug/pe"
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"strings"
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"strconv"
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)
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func getsymbols(filename string) map[uint64]string {
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dll, err := pe.Open(os.Args[1])
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if err != nil {
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panic(err)
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}
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defer dll.Close()
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imagebase := uint64(0)
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switch o := dll.OptionalHeader.(type) {
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case *pe.OptionalHeader32:
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imagebase = uint64(o.ImageBase)
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case *pe.OptionalHeader64:
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imagebase = o.ImageBase
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default:
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panic("unknown image base; can't continue")
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}
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names := make(map[uint64]string)
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for _, s := range dll.Symbols {
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switch s.SectionNumber {
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case 0, -1, -2: // undefined, constant, debugging
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continue
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}
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addr := uint64(s.Value)
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addr += imagebase
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section := dll.Sections[s.SectionNumber - 1]
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addr += uint64(section.VirtualAddress)
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names[addr] = s.Name
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}
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return names
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}
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type Entry struct {
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Leave bool
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Func string
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PerfCtr uint64
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}
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func getentries(filename string, names map[uint64]string) []Entry {
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f, err := os.Open(os.Args[2])
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if err != nil {
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panic(err)
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}
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defer f.Close()
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entries := make([]Entry, 0, 10240)
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scanner := bufio.NewScanner(f)
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for scanner.Scan() {
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l := scanner.Text()
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l = strings.TrimSpace(l)
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parts := strings.Split(l, " ")
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addr, err := strconv.ParseUint(parts[1], 16, 64)
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if err != nil {
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panic(err)
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}
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e := Entry{}
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e.Leave = parts[0] == "leave"
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e.Func = names[addr]
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e.PerfCtr, err = strconv.ParseUint(parts[2], 10, 64)
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if err != nil {
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panic(err)
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}
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entries = append(entries, e)
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}
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if err := scanner.Err(); err != nil {
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panic(err)
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}
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return entries
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}
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type Profile struct {
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Calls uint
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TotalTime uint64
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PerfCtr []uint64
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}
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var profile map[string]*Profile
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func run(e Entry) {
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p := profile[e.Func]
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if p == nil {
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p = new(Profile)
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}
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if !e.Leave {
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p.Calls++
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p.PerfCtr = append(p.PerfCtr, e.PerfCtr)
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} else {
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start := p.PerfCtr[len(p.PerfCtr) - 1]
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p.PerfCtr = p.PerfCtr[:len(p.PerfCtr) - 1]
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p.TotalTime += (e.PerfCtr - start)
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}
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profile[e.Func] = p
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}
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func main() {
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if len(os.Args) != 3 {
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fmt.Fprintf(os.Stderr, "usage: %s dll profout\n", os.Args[0])
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os.Exit(1)
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}
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names := getsymbols(os.Args[1])
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entries := getentries(os.Args[2], names)
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profile = make(map[string]*Profile)
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for _, e := range entries {
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run(e)
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}
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for f, p := range profile {
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fmt.Printf("%s %v %v ", f, p.Calls, p.TotalTime)
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if p.Calls != 0 {
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fmt.Printf("%v", p.TotalTime / uint64(p.Calls))
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} else {
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fmt.Printf("%v", 0)
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}
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fmt.Printf("\n")
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}
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}
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