// preprocess does filtering and aggregation of a profile based on the
// requested options.
func preprocess(prof *profile.Profile, ui plugin.UI, f *flags) error {
if *f.flagFocus != "" || *f.flagIgnore != "" || *f.flagHide != "" {
focus, ignore, hide, err := compileFocusIgnore(*f.flagFocus, *f.flagIgnore, *f.flagHide)
if err != nil {
return err
}
fm, im, hm := prof.FilterSamplesByName(focus, ignore, hide)
warnNoMatches(fm, *f.flagFocus, "Focus", ui)
warnNoMatches(im, *f.flagIgnore, "Ignore", ui)
warnNoMatches(hm, *f.flagHide, "Hide", ui)
}
if *f.flagTagFocus != "" || *f.flagTagIgnore != "" {
focus, err := compileTagFilter(*f.flagTagFocus, ui)
if err != nil {
return err
}
ignore, err := compileTagFilter(*f.flagTagIgnore, ui)
if err != nil {
return err
}
fm, im := prof.FilterSamplesByTag(focus, ignore)
warnNoMatches(fm, *f.flagTagFocus, "TagFocus", ui)
warnNoMatches(im, *f.flagTagIgnore, "TagIgnore", ui)
}
return aggregate(prof, f)
}
func addMappings(p *profile.Profile) error {
// Parse memory map from /proc/self/maps
f, err := os.Open("/proc/self/maps")
if err != nil {
return err
}
defer f.Close()
return p.ParseMemoryMap(f)
}
func generateReport(p *profile.Profile, cmd []string, obj plugin.ObjTool, ui plugin.UI, f *flags) error {
prof := p.Copy()
cf, err := cmdFlags(prof, cmd, ui, f)
if err != nil {
return err
}
return generate(true, prof, obj, ui, cf)
}
func generate(interactive bool, prof *profile.Profile, obj plugin.ObjTool, ui plugin.UI, f *flags) error {
o, postProcess, err := parseOptions(f)
if err != nil {
return err
}
var w io.Writer
if *f.flagOutput == "" {
w = os.Stdout
} else {
ui.PrintErr("Generating report in ", *f.flagOutput)
outputFile, err := os.Create(*f.flagOutput)
if err != nil {
return err
}
defer outputFile.Close()
w = outputFile
}
if prof.Empty() {
return fmt.Errorf("profile is empty")
}
value, stype, unit := sampleFormat(prof, f)
o.SampleType = stype
rpt := report.New(prof, *o, value, unit)
// Do not apply filters if we're just generating a proto, so we
// still have all the data.
if o.OutputFormat != report.Proto {
// Delay applying focus/ignore until after creating the report so
// the report reflects the total number of samples.
if err := preprocess(prof, ui, f); err != nil {
return err
}
}
if postProcess == nil {
return report.Generate(w, rpt, obj)
}
var dot bytes.Buffer
if err = report.Generate(&dot, rpt, obj); err != nil {
return err
}
return postProcess(&dot, w, ui)
}
func aggregate(prof *profile.Profile, f *flags) error {
switch {
case f.isFormat("proto"), f.isFormat("raw"):
// No aggregation for raw profiles.
case *f.flagLines:
return prof.Aggregate(true, true, true, true, false)
case *f.flagFiles:
return prof.Aggregate(true, false, true, false, false)
case *f.flagFunctions:
return prof.Aggregate(true, true, false, false, false)
case f.isFormat("weblist"), f.isFormat("disasm"), f.isFormat("callgrind"):
return prof.Aggregate(false, true, true, true, true)
}
return nil
}
// Symbolize symbolizes profile p by parsing data returned by a
// symbolz handler. syms receives the symbolz query (hex addresses
// separated by '+') and returns the symbolz output in a string. It
// symbolizes all locations based on their addresses, regardless of
// mapping.
func Symbolize(source string, syms func(string, string) ([]byte, error), p *profile.Profile) error {
if source = symbolz(source, p); source == "" {
// If the source is not a recognizable URL, do nothing.
return nil
}
// Construct query of addresses to symbolize.
var a []string
for _, l := range p.Location {
if l.Address != 0 && len(l.Line) == 0 {
a = append(a, fmt.Sprintf("%#x", l.Address))
}
}
if len(a) == 0 {
// No addresses to symbolize.
return nil
}
lines := make(map[uint64]profile.Line)
functions := make(map[string]*profile.Function)
if b, err := syms(source, strings.Join(a, "+")); err == nil {
buf := bytes.NewBuffer(b)
for {
l, err := buf.ReadString('\n')
if err != nil {
if err == io.EOF {
break
}
return err
}
if symbol := symbolzRE.FindStringSubmatch(l); len(symbol) == 3 {
addr, err := strconv.ParseUint(symbol[1], 0, 64)
if err != nil {
return fmt.Errorf("unexpected parse failure %s: %v", symbol[1], err)
}
name := symbol[2]
fn := functions[name]
if fn == nil {
fn = &profile.Function{
ID: uint64(len(p.Function) + 1),
Name: name,
SystemName: name,
}
functions[name] = fn
p.Function = append(p.Function, fn)
}
lines[addr] = profile.Line{Function: fn}
}
}
}
for _, l := range p.Location {
if line, ok := lines[l.Address]; ok {
l.Line = []profile.Line{line}
if l.Mapping != nil {
l.Mapping.HasFunctions = true
}
}
}
return nil
}