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