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3dfc40898c
The `__future__` we relied on is now, where the 3 specific things are all included [since Python 3.0](https://docs.python.org/3/library/__future__.html): * absolute_import * print_function * unicode_literals * division These import statements are no-ops and are no longer necessary.
68 lines
2.2 KiB
Python
Executable File
68 lines
2.2 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# This source file is part of the Swift.org open source project
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#
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# Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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# Licensed under Apache License v2.0 with Runtime Library Exception
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#
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# See https://swift.org/LICENSE.txt for license information
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# See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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import argparse
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import subprocess
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import sys
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parser = argparse.ArgumentParser()
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parser.add_argument("--path", help="path to a binary to check")
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parser.add_argument("--triple", help="target triple of the freestanding stdlib")
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parser.add_argument("--size-path", help="path to llvm-size binary to use")
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args = parser.parse_args()
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################################################################################
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#
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# EXPECTED/ALLOWED TEXT SEGMENT SIZE
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#
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# Before bumping the maximum text segment size please consult with:
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# @kubamracek, @compnerd
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#
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# The 'freestanding' build of the Swift runtime and standard library is
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# intended to be lean and allow dead-code elimination from the standard library
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# based on client code usage.
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#
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################################################################################
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# As of 2022-01-05: TEXT segment is 640 KiB on x86_64 Darwin, stdlib without
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# asserts. Let's allow for some minor increases (~ 15%) and cap at 740 kiB:
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max_text_size_x86_64_apple_macos = 740 * 1024
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################################################################################
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if args.triple == "x86_64-apple-macos":
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max_text_size = max_text_size_x86_64_apple_macos
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actual_text_size = 0
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nm = args.size_path
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lines = subprocess.check_output(
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[nm, "--format=darwin", args.path]) \
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.decode("utf-8").strip().splitlines()
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for line in lines:
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if line.startswith("Segment __TEXT: "):
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actual_text_size = int(line[len("Segment __TEXT: "):])
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if actual_text_size == 0:
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print("cannot determine TEXT segment size")
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sys.exit(1)
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else:
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print("triple {} not handled yet".format(args.triple))
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sys.exit(1)
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print("max_text_size: %d" % max_text_size)
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print("actual_text_size: %d" % actual_text_size)
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fail = actual_text_size > max_text_size
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sys.exit(1 if fail else 0)
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