Dwarf2

Dwarf2 is one of the first formats of debug info that supports the location lists of variables. The section of dwarf2 describing variables can contain location list. Basically it is the list of positions in code and for each position in code there is a list of changes of variables' positions. Daniel Berlin <dan@dberlin.org> was so kind and wrote the code for writing this debug information from NOTE_INSN_VAR_LOCATION notes for us.