// Demangle updates the function names in a profile with demangled C++
// names, simplified according to demanglerMode. If force is set,
// overwrite any names that appear already demangled.
func Demangle(prof *profile.Profile, force bool, demanglerMode string) {
if force {
// Remove the current demangled names to force demangling
for _, f := range prof.Function {
if f.Name != "" && f.SystemName != "" {
f.Name = f.SystemName
}
}
}
var options []demangle.Option
switch demanglerMode {
case "": // demangled, simplified: no parameters, no templates, no return type
options = []demangle.Option{demangle.NoParams, demangle.NoTemplateParams}
case "templates": // demangled, simplified: no parameters, no return type
options = []demangle.Option{demangle.NoParams}
case "full":
options = []demangle.Option{demangle.NoClones}
case "none": // no demangling
return
}
// Copy the options because they may be updated by the call.
o := make([]demangle.Option, len(options))
for _, fn := range prof.Function {
if fn.Name != "" && fn.SystemName != fn.Name {
continue // Already demangled.
}
copy(o, options)
if demangled := demangle.Filter(fn.SystemName, o...); demangled != fn.SystemName {
fn.Name = demangled
continue
}
// Could not demangle. Apply heuristics in case the name is
// already demangled.
name := fn.SystemName
if looksLikeDemangledCPlusPlus(name) {
if demanglerMode == "" || demanglerMode == "templates" {
name = removeMatching(name, '(', ')')
}
if demanglerMode == "" {
name = removeMatching(name, '<', '>')
}
}
fn.Name = name
}
}
// Demangle a string just as the GNU c++filt program does.
func doDemangle(out *bufio.Writer, name string) {
skip := 0
if name[0] == '.' || name[0] == '$' {
skip++
}
if *stripUnderscore && name[skip] == '_' {
skip++
}
result := demangle.Filter(name[skip:], options()...)
if result == name[skip:] {
out.WriteString(name)
} else {
if name[0] == '.' {
out.WriteByte('.')
}
out.WriteString(result)
}
}
