Function newSourcePrinter

internal/report/source.go:260–361

(rpt *Report, obj plugin.ObjTool, sourcePath string)

}

func newSourcePrinter(rpt *Report, obj plugin.ObjTool, sourcePath string) *sourcePrinter {
	sp := &sourcePrinter{
		reader:      newSourceReader(sourcePath, rpt.options.TrimPath),
		synth:       newSynthCode(rpt.prof.Mapping),
		objectTool:  obj,
		objects:     map[string]plugin.ObjFile{},
		sym:         rpt.options.Symbol,
		files:       map[string]*sourceFile{},
		insts:       map[uint64]instructionInfo{},
		prettyNames: map[string]string{},
		interest:    map[string]bool{},
	}

	// If the regexp source can be parsed as an address, also match
	// functions that land on that address.
	var address *uint64
	if sp.sym != nil {
		if hex, err := strconv.ParseUint(sp.sym.String(), 0, 64); err == nil {
			address = &hex
		}
	}

	addrs := map[uint64]addrInfo{}
	flat := map[uint64]int64{}
	cum := map[uint64]int64{}

	// Record an interest in the function corresponding to lines[index].
	markInterest := func(addr uint64, loc *profile.Location, index int) {
		fn := loc.Line[index]
		if fn.Function == nil {
			return
		}
		sp.interest[fn.Function.Name] = true
		sp.interest[fn.Function.SystemName] = true
		if _, ok := addrs[addr]; !ok {
			addrs[addr] = addrInfo{loc, sp.objectFile(loc.Mapping)}
		}
	}

	// See if sp.sym matches line.
	matches := func(line profile.Line) bool {
		if line.Function == nil {
			return false
		}
		return sp.sym.MatchString(line.Function.Name) ||
			sp.sym.MatchString(line.Function.SystemName) ||
			sp.sym.MatchString(line.Function.Filename)
	}

	// Extract sample counts and compute set of interesting functions.
	for _, sample := range rpt.prof.Sample {
		value := rpt.options.SampleValue(sample.Value)
		if rpt.options.SampleMeanDivisor != nil {
			div := rpt.options.SampleMeanDivisor(sample.Value)
			if div != 0 {
				value /= div
			}
		}