mirror of
https://github.com/react/react-native-devtools-frontend.git
synced 2026-09-28 21:24:26 +08:00
Dirk Pranke
a2674c024e
In Python 3.12, unrecognized escape character sequences in a string produce a "SyntaxWarning" log message when the file is parsed. The fix is (usually) to change the string from a regular string to a raw string, by putting an "r" in front of the leading quote. Bug: 376746798 Change-Id: Ie888a8de6ae42c4daae6fa5028134722634d70c1 Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/5981155 Commit-Queue: Dirk Pranke <dpranke@google.com> Reviewed-by: Michael Achenbach <machenbach@chromium.org> Reviewed-by: Liviu Rau <liviurau@chromium.org>
88 lines
2.6 KiB
Python
88 lines
2.6 KiB
Python
# Copyright 2022 The Chromium 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 argparse
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import json
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from os import path
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import platform
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import re
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import subprocess
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import sys
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REPO_DIR = path.join(path.dirname(__file__), '..', '..')
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def llvm_readobj():
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binary_name = {
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'Darwin': 'llvm-readobj',
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'Linux': 'llvm-readobj',
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'Windows': 'llvm-readobj.exe',
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}[platform.system()]
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return path.realpath(
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path.join(REPO_DIR, 'third_party', 'emscripten-releases', 'install',
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'bin', binary_name))
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def wasm_as():
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binary_name = {
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'Darwin': 'wasm-as',
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'Linux': 'wasm-as',
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'Windows': 'wasm-as.exe',
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}[platform.system()]
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return path.realpath(
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path.join(REPO_DIR, 'third_party', 'emscripten-releases', 'install',
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'bin', binary_name))
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def script_main(args):
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parser = argparse.ArgumentParser()
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parser.add_argument('input')
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parser.add_argument('output')
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options = parser.parse_args(args)
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sourcemap = f'{options.output}.map'
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subprocess.check_call([
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wasm_as(), options.input, '-g', '-sm', sourcemap, '-o', options.output
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])
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wasm_obj_headers = subprocess.check_output([
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llvm_readobj(),
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'-e',
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# TODO(crbug.com/1328729): use JSON output as soon as that's supported for wasm
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# '--elf-output-style=JSON',
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options.output
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])
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(size, offset) = re.search(
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rb'Section {[^}]*Type: CODE[^}]*Size: (\d*)[^}]*Offset: (\d*)[^}]*}',
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wasm_obj_headers).groups()
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# readobj reports as offset the location of the first byte of the header.
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# Our offsets are relative to the first byte of the section though, so
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# calculate the offset manually. The header is composed of one byte for the
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# section id, and an leb128 value for the length.
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size = int(size)
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leb_len = 0
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while size > 0:
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size >>= 7
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leb_len += 1
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offset = int(offset) + 1 + leb_len
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node = path.realpath(path.join(REPO_DIR, 'third_party', 'node', 'node.py'))
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sourcemap2json = path.realpath(
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path.join(REPO_DIR, 'scripts', 'build', 'wasm_sourcemap.mjs'))
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sourcemap_contents = subprocess.check_output([
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sys.executable, node, '--output', sourcemap2json, sourcemap,
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'%s' % (offset)
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])
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json_file = f'{options.output}.map.json'
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with open(json_file, 'wb') as output:
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output.write(sourcemap_contents)
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return 0
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if __name__ == '__main__':
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sys.exit(script_main(sys.argv[1:]))
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