annotation__histogram
symhist = annotation__histogram(notes, evsel);
struct sym_hist *h = annotation__histogram(notes, evsel);
struct sym_hist *h = annotation__histogram(notes, evsel);
struct sym_hist *h = annotation__histogram(notes, evsel);
struct sym_hist *h = annotation__histogram(notes, evsel);
struct sym_hist *sym_hist = annotation__histogram(notes, evsel);