f226350fcb
PR-URL: https://github.com/nodejs/node/pull/47251 Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com> Reviewed-By: Richard Lau <rlau@redhat.com>
60 lines
1.5 KiB
Python
60 lines
1.5 KiB
Python
#!/usr/bin/env python3
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# Copyright 2023 the V8 project 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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"""
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Checks for non-determinism in mksnapshot output by comparing output from
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multiple runs. Expected to be called with arguments like:
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<script> <report path> <gn gen dir> <gn out dir> <number of runs>
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The script will look for <number of runs> versions of snapshot and embedded
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builtins within the gn gen and out directories.
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"""
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import hashlib
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import sys
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from pathlib import Path
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ERROR_TEXT = """
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Non-deterministic %s.
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To reproduce, run mksnapshot multiple times and compare or:
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1) Set gn variable v8_verify_deterministic_mksnapshot = true
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2) Build target verify_deterministic_mksnapshot.
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"""
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assert len(sys.argv) == 5
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report = Path(sys.argv[1])
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gendir = Path(sys.argv[2])
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outdir = Path(sys.argv[3])
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n_runs = int(sys.argv[4])
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def md5(path):
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with open(path, 'rb') as f:
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return hashlib.md5(f.read()).digest()
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def snapshot_file(i):
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return outdir / f'snapshot_blob_run_{i}.bin'
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def builtins_file(i):
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return gendir / f'embedded_run_{i}.S'
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def verify(file_fun, type):
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different_hashes = set(md5(file_fun(i)) for i in range(n_runs))
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if len(different_hashes) != 1:
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print(ERROR_TEXT % type)
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sys.exit(1)
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verify(snapshot_file, 'shapshot')
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verify(builtins_file, 'embedded builtins')
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# Dummy output file needed when running an action target.
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with open(report, 'w') as f:
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f.write('Deterministic mksnapshot.')
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