// Set of function names that we are interested in (because they had
	// a sample and match sym).
	interest map[string]bool

	// Mapping from system function names to printable names.
	prettyNames map[string]string
}

// addrInfo holds information for an address we are interested in.
type addrInfo struct {
	loc *profile.Location // Always non-nil
	obj plugin.ObjFile    // May be nil
}