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#!/usr/bin/env python
#
# Copyright 2018 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Creates a compressed archive of unstripped binaries cataloged by
"ids.txt"."""
import argparse
import os
import subprocess
import sys
import tarfile
def main(args):
parser = argparse.ArgumentParser()
parser.add_argument('ids_txt', type=str, nargs=1,
help='Path to ids.txt files.')
parser.add_argument('-o', '--output_tarball', nargs=1, type=str,
help='Path which the tarball will be written to.')
parser.add_argument('--fuchsia-build-id-dir', type=str, required=True,
help='Directory containing symbols for SDK prebuilts.')
args = parser.parse_args(args)
ids_txt = args.ids_txt[0]
build_ids_archive = tarfile.open(args.output_tarball[0], 'w:bz2')
for line in open(ids_txt, 'r'):
build_id, binary_path = line.strip().split(' ')
# Look for prebuilt symbols in the SDK first.
symbol_source_path = os.path.join(args.fuchsia_build_id_dir,
build_id[:2],
build_id[2:] + '.debug')
if not os.path.exists(symbol_source_path):
symbol_source_path = os.path.abspath(
os.path.join(os.path.dirname(ids_txt), binary_path))
if os.path.getsize(symbol_source_path) == 0:
# This is a prebuilt which wasn't accompanied by SDK symbols.
continue
# Exclude stripped binaries (indicated by their lack of symbol tables).
readelf_output = subprocess.check_output(
['readelf', '-S', symbol_source_path], universal_newlines=True)
if not '.symtab' in readelf_output:
continue
# Archive the unstripped ELF binary, placing it in a hierarchy keyed to the
# GNU build ID. The binary resides in a directory whose name is the first
# two characters of the build ID, with the binary file itself named after
# the remaining characters of the build ID. So, a binary file with the build
# ID "deadbeef" would be located at the path 'de/adbeef.debug'.
build_ids_archive.add(symbol_source_path,
'%s/%s.debug' % (build_id[:2], build_id[2:]))
return 0
if __name__ == '__main__':
sys.exit(main(sys.argv[1:]))
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