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# -*- coding: utf-8 -*-
# Copyright 2018 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""check compile units."""
from __future__ import print_function
import os
import subprocess
import check_ngcc
cu_checks = [check_ngcc.not_by_gcc]
def check_compile_unit(dso_path, producer, comp_path):
"""check all compiler flags used to build the compile unit.
Args:
dso_path: path to the elf/dso.
producer: DW_AT_producer contains the compiler command line.
comp_path: DW_AT_comp_dir + DW_AT_name.
Returns:
A set of failed tests.
"""
failed = set()
for c in cu_checks:
if not c(dso_path, producer, comp_path):
failed.add(c.__module__)
return failed
def check_compile_units(dso_path):
"""check all compile units in the given dso.
Args:
dso_path: path to the dso.
Returns:
True if everything looks fine otherwise False.
"""
failed = set()
producer = ''
comp_path = ''
readelf = subprocess.Popen(
['llvm-dwarfdump', '--recurse-depth=0', dso_path],
stdout=subprocess.PIPE,
stderr=open(os.devnull, 'w'),
encoding='utf-8')
for l in readelf.stdout:
if 'DW_TAG_compile_unit' in l:
if producer:
failed = failed.union(check_compile_unit(dso_path, producer, comp_path))
producer = ''
comp_path = ''
elif 'DW_AT_producer' in l:
producer = l
elif 'DW_AT_name' in l:
comp_path = os.path.join(comp_path, l.split(':')[-1].strip())
elif 'DW_AT_comp_dir' in l:
comp_path = os.path.join(l.split(':')[-1].strip(), comp_path)
if producer:
failed = failed.union(check_compile_unit(dso_path, producer, comp_path))
if failed:
print('%s failed check: %s' % (dso_path, ' '.join(failed)))
return False
return True
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