105 lines
3.3 KiB
Python
Executable File
105 lines
3.3 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (C) 2017 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Like llvm-symbolizer for UI JS/TS sources.
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This script is used to "symbolize" UI crashes. It takes a crash, typically
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copied from a bug reports, of the form:
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(https://ui.perfetto.dev/v12.1.269/frontend_bundle.js:7639:61) at foo()
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(https://ui.perfetto.dev/v12.1.269/frontend_bundle.js:9235:29) at bar()
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it fetches the corresponding source maps and emits in output a translated
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crash report, of the form:
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https://android.googlesource.com/platform/external/perfetto/+/de4db33f/ui/src/foo.ts#61 at foo()
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https://android.googlesource.com/platform/external/perfetto/+/de4db33f/ui/src/baz.ts#300 at bar()
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"""
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import logging
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import re
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import sys
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import tempfile
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import urllib.request
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import ssl
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import os
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try:
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import sourcemap
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except:
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print('Run `pip3 install sourcemap` and try again')
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sys.exit(1)
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GERRIT_BASE_URL = 'https://android.googlesource.com/platform/external/perfetto/'
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def fetch_url_cached(url):
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normalized = re.sub('[^a-zA-Z0-9-._]', '_', url)
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local_file = os.path.join(tempfile.gettempdir(), normalized)
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if os.path.exists(local_file):
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logging.debug('Using %s', local_file)
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with open(local_file, 'r') as f:
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return f.read()
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context = ssl._create_unverified_context()
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logging.info('Fetching %s', url)
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resp = urllib.request.urlopen(url, context=context)
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contents = resp.read().decode()
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with open(local_file, 'w') as f:
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f.write(contents)
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return contents
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def Main():
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if len(sys.argv) > 1:
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with open(sys.argv[1], 'r') as f:
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txt = f.read()
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else:
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if sys.stdin.isatty():
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print('Paste the crash log and press CTRL-D\n')
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txt = sys.stdin.read()
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# Look for the GIT commitish appended in crash reports. This is not required
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# for resolving the sourcemaps but helps generating better links.
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matches = re.findall(r'([a-f0-9]{40})\sUA', txt)
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git_rev = matches[0] if matches else 'HEAD'
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matches = re.findall(r'((\bhttp.+?\.js):(\d+):(\d+))', txt)
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maps_by_url = {}
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sym_lines = ''
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for entry in matches:
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whole_token, script_url, line, col = entry
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map_url = script_url + '.map'
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if map_url in maps_by_url:
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srcmap = maps_by_url[map_url]
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else:
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map_file_contents = fetch_url_cached(map_url)
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srcmap = sourcemap.loads(map_file_contents)
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maps_by_url[map_url] = srcmap
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sym = srcmap.lookup(int(line), int(col))
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src = sym.src.replace('../../', '')
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sym_url = '%s#%s' % (src, sym.src_line)
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if src.startswith('../out/ui/'):
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src = src.replace('../out/ui/', 'ui/')
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sym_url = GERRIT_BASE_URL + '/+/%s/%s#%d' % (git_rev, src, sym.src_line)
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sym_lines += sym_url + '\n'
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txt = txt.replace(whole_token, sym_url)
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print(txt)
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print('\nResolved symbols:\n' + sym_lines)
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if __name__ == '__main__':
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logging.basicConfig(level=logging.INFO)
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sys.exit(Main())
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