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#-------------------------------------------------------------------------------
# elftools example: examine_dwarf_info.py
#
# An example of examining information in the .debug_info section of an ELF file.
#
# Eli Bendersky (eliben@gmail.com)
# This code is in the public domain
#-------------------------------------------------------------------------------
from __future__ import print_function
from pathlib import Path
import sys
# If pyelftools is not installed, the example can also run from the root or
# examples/ dir of the source distribution.
sys.path[0:0] = ['.', '..']
from elftools.elf.elffile import ELFFile
def process_file(filename):
print('Processing file:', filename)
with open(filename, 'rb') as f:
elffile = ELFFile(f)
if not elffile.has_dwarf_info():
print(' file has no DWARF info')
return
# get_dwarf_info returns a DWARFInfo context object, which is the
# starting point for all DWARF-based processing in pyelftools.
dwarfinfo = elffile.get_dwarf_info()
for CU in dwarfinfo.iter_CUs():
# DWARFInfo allows to iterate over the compile units contained in
# the .debug_info section. CU is a CompileUnit object, with some
# computed attributes (such as its offset in the section) and
# a header which conforms to the DWARF standard. The access to
# header elements is, as usual, via item-lookup.
print(' Found a compile unit at offset %s, length %s' % (
CU.cu_offset, CU['unit_length']))
# The first DIE in each compile unit describes it.
top_DIE = CU.get_top_DIE()
print(' Top DIE with tag=%s' % top_DIE.tag)
# We're interested in the filename...
print(' name=%s' % Path(top_DIE.get_full_path()).as_posix())
if __name__ == '__main__':
if sys.argv[1] == '--test':
for filename in sys.argv[2:]:
process_file(filename)
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