dwarf-recover-src-tree.py

#!/usr/bin/env python

# Use like this:
# cd into empty directory where source tree will be reconstructed
# objdump --dwarf=decodedline <list of elfs> |dwarf-recover-src-tree.py
# (tested only with GNU objdump 2.26.1)

import sys, os, string

dictionary = {}

for line in sys.stdin:
    line = line.rstrip()
    if line == "":
        continue

    if (line.find("file format elf") > 0 or
        line == "Decoded dump of debug contents of section .debug_line:" or
        line.startswith("CU:") or
        line.startswith("File name")):
        continue

    if line.endswith(":"):
        last_path = os.path.normpath(line[:-1])
        last_file = os.path.basename(last_path)
        if not last_path in dictionary:
            dictionary[last_path] = 0
    else:
        (current_file, line_count, _) = string.split(line, None, 2)
        line_count = int(line_count)
        if current_file == last_file:
            if dictionary[last_path] < line_count:
                dictionary[last_path] = line_count

for path in dictionary:
    os.system("mkdir -p ." + os.path.dirname(path))
    with open("." + path, "w") as fake:
        fake.write("\n" * dictionary[path])