Method namesForSubprogram

dwarf.go:372–414

Returns a human-readable name and the name the most likely to match the one used in the wasm module. Walks up the inlining chain. Subprogram is optional. This function will look for the associated subprogram if spgm is nil.

(e *dwarf.Entry, spgm *subprogram)

// Subprogram is optional. This function will look for the associated subprogram
// if spgm is nil.
func (d *dwarfmapper) namesForSubprogram(e *dwarf.Entry, spgm *subprogram) (string, string) {
	// If an inlined function, grab the name from the origin.
	var err error
	r := d.d.Reader()
	for {
		ao, ok := e.Val(dwarf.AttrAbstractOrigin).(dwarf.Offset)
		if !ok {
			break
		}
		r.Seek(ao)
		e, err = r.Next()
		if err != nil {
			// malformed dwarf
			break
		}
	}

	// TODO: index
	if spgm == nil {
		for _, s := range d.subprograms {
			if s.Subprogram.Entry.Offset == e.Offset {
				spgm = s.Subprogram
				break
			}
		}
	}

	var ns string
	if spgm != nil {
		ns = spgm.Namespace
		// } else {
		//		panic("spgm not found")
	}

	name, _ := e.Val(dwarf.AttrName).(string)
	name = ns + name
	stableName, ok := e.Val(dwarf.AttrLinkageName).(string)
	if !ok {
		stableName = name
	}

	return name, stableName
}