Esempio n. 1
0
File: source.go Progetto: lewgun/gom
// assemblyPerSourceLine disassembles the binary containing a symbol
// and classifies the assembly instructions according to its
// corresponding source line, annotating them with a set of samples.
func assemblyPerSourceLine(objSyms []*objSymbol, rs nodes, src string, obj plugin.ObjTool) map[int]nodes {
	assembly := make(map[int]nodes)
	// Identify symbol to use for this collection of samples.
	o := findMatchingSymbol(objSyms, rs)
	if o == nil {
		return assembly
	}

	// Extract assembly for matched symbol
	insns, err := obj.Disasm(o.sym.File, o.sym.Start, o.sym.End)
	if err != nil {
		return assembly
	}

	srcBase := filepath.Base(src)
	anodes := annotateAssembly(insns, rs, o.base)
	var lineno = 0
	for _, an := range anodes {
		if filepath.Base(an.info.file) == srcBase {
			lineno = an.info.lineno
		}
		if lineno != 0 {
			assembly[lineno] = append(assembly[lineno], an)
		}
	}

	return assembly
}
Esempio n. 2
0
File: report.go Progetto: lewgun/gom
// printAssembly prints an annotated assembly listing.
func printAssembly(w io.Writer, rpt *Report, obj plugin.ObjTool) error {
	g, err := newGraph(rpt)
	if err != nil {
		return err
	}

	o := rpt.options
	prof := rpt.prof

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

	fmt.Fprintln(w, "Total:", rpt.formatValue(rpt.total))
	symbols := symbolsFromBinaries(prof, g, o.Symbol, address, obj)
	symNodes := nodesPerSymbol(g.ns, symbols)
	// Sort function names for printing.
	var syms objSymbols
	for s := range symNodes {
		syms = append(syms, s)
	}
	sort.Sort(syms)

	// Correlate the symbols from the binary with the profile samples.
	for _, s := range syms {
		sns := symNodes[s]

		// Gather samples for this symbol.
		flatSum, cumSum := sumNodes(sns)

		// Get the function assembly.
		insns, err := obj.Disasm(s.sym.File, s.sym.Start, s.sym.End)
		if err != nil {
			return err
		}

		ns := annotateAssembly(insns, sns, s.base)

		fmt.Fprintf(w, "ROUTINE ======================== %s\n", s.sym.Name[0])
		for _, name := range s.sym.Name[1:] {
			fmt.Fprintf(w, "    AKA ======================== %s\n", name)
		}
		fmt.Fprintf(w, "%10s %10s (flat, cum) %s of Total\n",
			rpt.formatValue(flatSum), rpt.formatValue(cumSum),
			percentage(cumSum, rpt.total))

		for _, n := range ns {
			fmt.Fprintf(w, "%10s %10s %10x: %s\n", valueOrDot(n.flat, rpt), valueOrDot(n.cum, rpt), n.info.address, n.info.name)
		}
	}
	return nil
}