Sigmund Cherem
db2c9eeb76
TBR=johnniwinther@google.com Change-Id: I252751d8163a056784b10dcb58633c4206a849a0 Reviewed-on: https://dart-review.googlesource.com/c/82883 Reviewed-by: Sigmund Cherem <sigmund@google.com> Commit-Queue: Sigmund Cherem <sigmund@google.com>
87 lines
3.1 KiB
Dart
87 lines
3.1 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();
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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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