86 lines
3.3 KiB
Python
86 lines
3.3 KiB
Python
# Copyright 2021 The Pigweed Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may not
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# use this file except in compliance with the License. You may obtain a copy of
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# the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations under
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# the License.
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"""Tests for pw_build_info's GNU build ID support."""
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import subprocess
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import tempfile
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import unittest
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from pathlib import Path
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from pw_cli import env
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from pw_build_info import build_id
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# Since build_id.cc depends on pw_preprocessor, we have to use the in-tree path.
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_MODULE_DIR = Path(env.pigweed_environment().PW_ROOT) / 'pw_build_info'
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_MODULE_PY_DIR = Path(__file__).parent.resolve()
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_SHA1_BUILD_ID_LENGTH = 20
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class TestGnuBuildId(unittest.TestCase):
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"""Unit tests for GNU build ID parsing."""
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def test_build_id_correctness(self):
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"""Tests to ensure GNU build IDs are read/written correctly."""
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with tempfile.TemporaryDirectory() as exe_dir:
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exe_file = Path(exe_dir) / 'print_build_id.elf'
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# Compiles a binary that prints the embedded GNU build id.
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cmd = [
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'clang++',
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'build_id.cc',
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_MODULE_PY_DIR / 'print_build_id.cc',
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'-Ipublic',
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'-I../pw_preprocessor/public',
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'-std=c++20',
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'-fuse-ld=lld',
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'-Wl,-Tadd_build_id_to_default_linker_script.ld',
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'-Wl,--build-id=sha1',
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'-o',
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exe_file,
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]
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process = subprocess.run(cmd,
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT,
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cwd=_MODULE_DIR)
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self.assertEqual(process.returncode, 0)
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# Run the compiled binary so the printed build ID can be read.
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process = subprocess.run([exe_file],
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT,
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cwd=_MODULE_DIR)
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self.assertEqual(process.returncode, 0)
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with open(exe_file, 'rb') as elf:
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expected = build_id.read_build_id_from_section(elf)
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self.assertEqual(len(expected), _SHA1_BUILD_ID_LENGTH)
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self.assertEqual(process.stdout.decode().rstrip(),
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expected.hex())
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# Test method that parses using symbol information.
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expected = build_id.read_build_id_from_symbol(elf)
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self.assertEqual(len(expected), _SHA1_BUILD_ID_LENGTH)
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self.assertEqual(process.stdout.decode().rstrip(),
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expected.hex())
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# Test the user-facing method.
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expected = build_id.read_build_id(elf)
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self.assertEqual(len(expected), _SHA1_BUILD_ID_LENGTH)
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self.assertEqual(process.stdout.decode().rstrip(),
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expected.hex())
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if __name__ == '__main__':
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unittest.main()
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