Test gist for debugging location list parsing

ll.py

from sys import argv
from elftools.common.exceptions import ELFParseError
from elftools.dwarf.locationlists import LocationLists, LocationListsPair, LocationParser
from elftools.elf.elffile import ELFFile
from inspect import getframeinfo
from elftools.dwarf.dwarfinfo import DWARFInfo

def location_lists(self):
    """ Get a LocationLists object representing the .debug_loc/debug_loclists section of
        the DWARF data, or None if this section doesn't exist.

        If both sections exist, it returns a LocationListsPair.
    """
    if self.debug_loclists_sec and self.debug_loc_sec is None:
        return LocationLists(self.debug_loclists_sec.stream, self.structs, 5, self)
    elif self.debug_loc_sec and self.debug_loclists_sec is None:
        return LocationLists(self.debug_loc_sec.stream, self.structs, 4, self)
    elif self.debug_loc_sec and self.debug_loclists_sec:
        return LocationListsPair(self.debug_loc_sec.stream, self.debug_loclists_sec.stream, self.structs, self)
    else:
        return None
    
DWARFInfo.location_lists = location_lists

die_offset = int(argv[2], 16)
di = ELFFile(open(argv[1], 'rb')).get_dwarf_info()
CU = next(cu for cu in di.iter_CUs() if cu.cu_offset <= die_offset < cu.cu_die_offset + cu.header.unit_length)
die = next(die for die in CU.iter_DIEs() if die.offset == die_offset)
locparser = LocationParser(di.location_lists())
attr = die.attributes['DW_AT_location']
try:
    locparser.parse_from_attribute(attr, CU['version'], die = die)
    print("Parsed")
except ELFParseError as exc:
    tb = exc.__traceback__
    tracebacks = []
    while tb.tb_next:
        tracebacks.insert(0, tb)
        tb = tb.tb_next
    crash_frame = tracebacks[1].tb_frame
    fi = getframeinfo(crash_frame)
    print("%s:%d\n" %(fi.filename, fi.lineno))
    for (k, v) in crash_frame.f_locals.items():
        print("%s: %s" % (k, str(v)))