// greetings prints a brief welcome and some overall profile
// information before accepting interactive commands.
func greetings(p *profile.Profile, ui plugin.UI) {
ropt, err := reportOptions(p, pprofVariables)
if err == nil {
ui.Print(strings.Join(report.ProfileLabels(report.New(p, ropt)), "\n"))
}
ui.Print("Entering interactive mode (type \"help\" for commands, \"o\" for options)")
}
func printCurrentOptions(p *profile.Profile, ui plugin.UI) {
var args []string
type groupInfo struct {
set string
values []string
}
groups := make(map[string]*groupInfo)
for n, o := range pprofVariables {
v := o.stringValue()
comment := ""
if g := o.group; g != "" {
gi, ok := groups[g]
if !ok {
gi = &groupInfo{}
groups[g] = gi
}
if o.boolValue() {
gi.set = n
}
gi.values = append(gi.values, n)
continue
}
switch {
case n == "sample_index":
st := sampleTypes(p)
if v == "" {
// Apply default (last sample index).
v = st[len(st)-1]
}
// Add comments for all sample types in profile.
comment = "[" + strings.Join(st, " | ") + "]"
case n == "source_path":
continue
case n == "nodecount" && v == "-1":
comment = "default"
case v == "":
// Add quotes for empty values.
v = `""`
}
if comment != "" {
comment = commentStart + " " + comment
}
args = append(args, fmt.Sprintf(" %-25s = %-20s %s", n, v, comment))
}
for g, vars := range groups {
sort.Strings(vars.values)
comment := commentStart + " [" + strings.Join(vars.values, " | ") + "]"
args = append(args, fmt.Sprintf(" %-25s = %-20s %s", g, vars.set, comment))
}
sort.Strings(args)
ui.Print(strings.Join(args, "\n"))
}
// convertPerfData converts the file at path which should be in perf.data format
// using the perf_to_profile tool and returns the file containing the
// profile.proto formatted data.
func convertPerfData(perfPath string, ui plugin.UI) (*os.File, error) {
ui.Print(fmt.Sprintf(
"Converting %s to a profile.proto... (May take a few minutes)",
perfPath))
profile, err := newTempFile(os.TempDir(), "pprof_", ".pb.gz")
if err != nil {
return nil, err
}
deferDeleteTempFile(profile.Name())
cmd := exec.Command("perf_to_profile", perfPath, profile.Name())
if err := cmd.Run(); err != nil {
profile.Close()
return nil, fmt.Errorf("failed to convert perf.data file. Try github.com/google/perf_data_converter: %v", err)
}
return profile, nil
}
// fetch fetches a profile from source, within the timeout specified,
// producing messages through the ui. It returns the profile and the
// url of the actual source of the profile for remote profiles.
func fetch(source string, duration, timeout time.Duration, ui plugin.UI) (p *profile.Profile, src string, err error) {
var f io.ReadCloser
if sourceURL, timeout := adjustURL(source, duration, timeout); sourceURL != "" {
ui.Print("Fetching profile over HTTP from " + sourceURL)
if duration > 0 {
ui.Print(fmt.Sprintf("Please wait... (%v)", duration))
}
f, err = fetchURL(sourceURL, timeout)
src = sourceURL
} else {
f, err = os.Open(source)
}
if err == nil {
defer f.Close()
p, err = profile.Parse(f)
}
return
}
// commandHelp displays help and usage information for all Commands
// and Variables or a specific Command or Variable.
func commandHelp(args string, ui plugin.UI) {
if args == "" {
help := usage(false)
help = help + `
: Clear focus/ignore/hide/tagfocus/tagignore
type "help <cmd|option>" for more information
`
ui.Print(help)
return
}
if c := pprofCommands[args]; c != nil {
ui.Print(c.help(args))
return
}
if v := pprofVariables[args]; v != nil {
ui.Print(v.help + "\n")
return
}
ui.PrintErr("Unknown command: " + args)
}