mirror of
https://github.com/react/react-native-devtools-frontend.git
synced 2026-10-21 21:47:18 +08:00
Philip Pfaffe
e29b186fe5
This CL introduces support for writing inputs to wasm tests in wat format. This will allow removing dependencies on opaque binary resources that can't be regenerated without changing hardcoded offsets in all tests. Referencing binary and/or source file offsets will now be possible through special comments left in the wat source. Bug: 1328729 Change-Id: I6369c86ca57860fd9803b894797f63c36c65d554 Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3666419 Commit-Queue: Philip Pfaffe <pfaffe@chromium.org> Reviewed-by: Simon Zünd <szuend@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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b'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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