// 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 graph.Nodes, src string, obj plugin.ObjTool) map[int]graph.Nodes {
assembly := make(map[int]graph.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
}
// printAssembly prints an annotated assembly listing.
func printAssembly(w io.Writer, rpt *Report, obj plugin.ObjTool) error {
o := rpt.options
prof := rpt.prof
g := rpt.newGraph(nil)
// 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.Nodes, 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 := sns.Sum()
// 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
}