rb_str_new_shared  562 include/ruby/intern.h VALUE rb_str_new_shared(VALUE);
rb_str_new_shared  678 include/ruby/intern.h #define rb_str_new3 rb_str_new_shared
rb_str_new_shared 1408 string.c               str2 = rb_str_new_shared(rb_str_new_frozen(str));