Sigmund Cherem
4a42831e85
This works on all browsers, in d8, and supports both dartdevk and dart2js. In the case of dart2js, this also expands minified names and inlined data. The result is presented to users as a separate section, so the original JS stack trace is printed as is, and a second deobfuscated stack trace is printed afterwards. Change-Id: I10af5e0241a8c87ad8db48234ce52cfb51a27411 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/132966 Commit-Queue: Sigmund Cherem <sigmund@google.com> Reviewed-by: Vijay Menon <vsm@google.com> Reviewed-by: Bob Nystrom <rnystrom@google.com>
87 lines
3.2 KiB
Dart
87 lines
3.2 KiB
Dart
// Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import 'dart:io';
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import 'dart:math' show max;
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import 'package:stack_trace/stack_trace.dart';
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import 'package:dart2js_tools/src/trace.dart';
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import 'package:dart2js_tools/src/name_decoder.dart';
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import 'package:dart2js_tools/src/util.dart';
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import 'package:dart2js_tools/src/trace_decoder.dart';
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/// Script that deobuscates a stack-trace given in a text file.
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///
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/// To run this script you need 3 or more files:
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///
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/// * A stacktrace file
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/// * The deployed .js file
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/// * The corresponding .map file
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///
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/// There might be more than one .js/.map file if your app is divided in
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/// deferred chunks.
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///
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/// The stack trace file contains a copy/paste of a JavaScript stack trace, of
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/// this form:
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///
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/// at aB.a20 (main.dart.js:71969:32)
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/// at aNk.goV (main.dart.js:72040:52)
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/// at aNk.gfK (main.dart.js:72038:27)
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/// at FE.gtn (main.dart.js:72640:24)
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/// at aBZ.ghN (main.dart.js:72642:24)
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/// at inheritance (main.dart.js:105334:0)
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/// at FE (main.dart.js:5037:18)
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///
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/// If you download the stacktrace from a production service, you can keep the
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/// full URL (including http://....) and this script will simply try to match
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/// the name of the file at the end with a file in the current working
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/// directory.
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///
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/// The .js file must contain a `//# sourceMappingURL=` line at the end, which
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/// tells this script how to determine the name of the source-map file.
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main(List<String> args) {
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if (args.length != 1) {
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print('usage: deobfuscate.dart <stack-trace-file>');
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exit(1);
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}
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var sb = new StringBuffer();
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try {
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String obfuscatedTrace = new File(args[0]).readAsStringSync();
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String error = extractErrorMessage(obfuscatedTrace);
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var provider = new CachingFileProvider(logger: Logger());
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StackDeobfuscationResult result =
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deobfuscateStack(obfuscatedTrace, provider);
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Frame firstFrame = result.original.frames.first;
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String translatedError =
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translate(error, provider.mappingFor(firstFrame.uri));
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if (translatedError == null) translatedError = '<no error message found>';
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printPadded(translatedError, error, sb);
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int longest =
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result.deobfuscated.frames.fold(0, (m, f) => max(f.member.length, m));
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for (var originalFrame in result.original.frames) {
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var deobfuscatedFrames = result.frameMap[originalFrame];
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if (deobfuscatedFrames == null) {
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printPadded('no mapping', '${originalFrame.location}', sb);
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} else {
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for (var frame in deobfuscatedFrames) {
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printPadded('${frame.member.padRight(longest)} ${frame.location}',
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'${originalFrame.location}', sb);
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}
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}
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}
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} finally {
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print('$sb');
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}
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}
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final green = stdout.hasTerminal ? '\x1b[32m' : '';
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final none = stdout.hasTerminal ? '\x1b[0m' : '';
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printPadded(String mapping, String original, sb) {
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var len = mapping.length;
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var s = mapping.indexOf('\n');
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if (s >= 0) len -= s + 1;
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var pad = ' ' * (50 - len);
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sb.writeln('$green$mapping$none$pad ... $original');
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}
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