Devon Carew
8935cb0a53
Change-Id: I302b8e9d6568ac43ec4e9ba29b660e1528f4d61a Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/281223 Reviewed-by: Nate Bosch <nbosch@google.com> Commit-Queue: Devon Carew <devoncarew@google.com>
63 lines
2.6 KiB
Dart
63 lines
2.6 KiB
Dart
import 'dart:math' show max;
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import 'package:dart2js_tools/src/name_decoder.dart';
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import 'package:dart2js_tools/src/trace.dart';
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import 'package:dart2js_tools/src/trace_decoder.dart';
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import 'package:dart2js_tools/src/util.dart';
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import 'package:stack_trace/stack_trace.dart';
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/// Deobfuscates 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.isScheme('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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