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>
62 lines
2.6 KiB
Dart
62 lines
2.6 KiB
Dart
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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/// Deobuscates the given [obfuscatedTrace].
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///
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/// This method assumes a stack trace contains URIs normalized to be file URIs.
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/// If for example you obtain a stack from a browser, you may need to preprocess
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/// the stack to map the URI of the JavaScript files to URIs in the local file
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/// system.
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///
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/// For example, a valid input to this method would be:
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///
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/// Error: no such method
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/// at aB.a20 (/usr/local/foo/main.dart.js:71969:32)
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/// at aNk.goV (/usr/local/foo/main.dart.js:72040:52)
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/// at aNk.gfK (/usr/local/foo/main.dart.js:72038:27)
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/// at FE.gtn (/usr/local/foo/main.dart.js:72640:24)
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/// at aBZ.ghN (/usr/local/foo/main.dart.js:72642:24)
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/// at inheritance (/usr/local/foo/main.dart.js:105334:0)
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/// at FE (/usr/local/foo/main.dart.js:5037:18)
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///
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/// Internally this method will read those JavaScript files, search for the
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/// `//# sourceMappingURL=` line at the end, and load the corresponding
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/// source-map file.
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String deobfuscateStackTrace(String obfuscatedTrace) {
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String error = extractErrorMessage(obfuscatedTrace);
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var provider = CachingFileProvider();
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StackDeobfuscationResult result = deobfuscateStack(obfuscatedTrace, provider);
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Frame firstFrame = result.original.frames.first;
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String translatedError = (firstFrame.uri.scheme == 'error'
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? null
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: translate(error, provider.mappingFor(firstFrame.uri))) ??
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'<no error message found>';
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var sb = StringBuffer();
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sb.writeln(translatedError);
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maxMemberLengthHelper(int m, Frame f) => max(f.member.length, m);
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int longest = result.deobfuscated.frames.fold(0, maxMemberLengthHelper);
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longest = result.original.frames.fold(longest, maxMemberLengthHelper);
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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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var name = originalFrame.member;
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sb.writeln(' at ${name.padRight(longest)} ${originalFrame.location}');
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} else {
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for (var frame in deobfuscatedFrames) {
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var name = frame.member;
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// TODO(sigmund): eventually when ddc stops shipping source-maps to the
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// client, we can start encoding the function name and remove this
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// workaround.
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if (name == '<unknown>') name = originalFrame.member;
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sb.writeln(' at ${name.padRight(longest)} ${frame.location}');
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}
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}
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}
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return '$sb';
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}
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