Michael Achenbach
8d576e0530
This adds a feature to run.py that enables logging stdout to a file. The script is used as a wrapper to all non-python gn actions. We use it now in mksnapshot to log output on the determinism bots with some tracing turned on (--trace-read-only-promotion). The logs are treated as data and as such get isolated to CAS after compilation for debugging purposes. Bug: 338419287 Change-Id: Iba426d0b012fd4eb9c7c8e2c7dffae46aad11248 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/5826652 Commit-Queue: Michael Achenbach <machenbach@chromium.org> Reviewed-by: Michael Lippautz <mlippautz@chromium.org> Cr-Commit-Position: refs/heads/main@{#95883}
40 lines
1.1 KiB
Python
Executable File
40 lines
1.1 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright 2014 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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"""This program wraps an arbitrary command since gn currently can only execute
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scripts."""
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import subprocess
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import sys
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from pathlib import Path
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# The first two arguments can be used to specify a file to redirect the
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# stdout to.
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cmd = sys.argv[1:]
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kwargs = {}
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stdout_file = None
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if cmd and cmd[0] == '--redirect-stdout':
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stdout_file = Path(cmd[1])
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kwargs = dict(stdout=subprocess.PIPE)
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cmd = cmd[2:]
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process = subprocess.Popen(cmd, **kwargs)
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stdout, _ = process.communicate()
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if stdout_file:
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with stdout_file.open('w') as f:
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f.write(stdout.decode('utf-8'))
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result = process.returncode
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if result != 0:
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# Windows error codes such as 0xC0000005 and 0xC0000409 are much easier
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# to recognize and differentiate in hex.
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if result < -100:
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# Print negative hex numbers as positive by adding 2^32.
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print('Return code is %08X' % (result + 2**32))
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else:
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print('Return code is %d' % result)
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sys.exit(result)
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