This reduce the memory footprint and cost of parsing these extensions. Another
advantage is a reduction on the size of the .map files. On a large customer
app, this was a 11% reduction, and the frames section was about 1Mb (excluding
the extra names and uris added on the existing tables).
The encoding works as follows:
- minified names are written as a list of names and indices, in pairs.
{'n1': 1, 'n2': 2} => 'n1,1,n2,2'
- frames are encoded using a sequence of values with markers for the different
kind of frames. Numbers are encoded using VLQ deltas. We use VLQ because it's
already available to any parser that deals with the mappings).
This change also uses the dart2js_tools parser implementation for all unit tests.
Change-Id: Iacc2833c6517eb473955cc618adec501c610870f
Reviewed-on: https://dart-review.googlesource.com/c/82780
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Commit-Queue: Sigmund Cherem <sigmund@google.com>
Changes include:
* Added a couple no-such-method decoders.
* Apply deobfuscation rules more than once per line
* Fixed pattern matched for minified names.
* Added support for expanding the call signature from call selectors
* Fix backward search to find the function declaration
* Refactor trace deobfuscation logic:
* add dependency on stack\_trace to parse frames
* add library to expose trace deobfsucation and keep that separate from
printing the results
* Fix off-by-one error when extracting the name of a function whose index is 0.
* Avoid crash if we can't get a function name.
Change-Id: I016a293efadbdd8ddf66a007b182d5485eb2311f
Reviewed-on: https://dart-review.googlesource.com/c/82711
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Auto-Submit: Sigmund Cherem <sigmund@google.com>
This is an initial implementation of the dart deobfuscator tool.
Let me know your thoughts on the package name. I used to have this named as
`package:deobfuscate`, but it feels like we will want to add more tools that are
not about deobfuscation in the future, so I picked `package:dart2js_tools`
instead. That also gives us the opportunity to move over the dart2js_info code
here too.
Change-Id: I2ff948982969c9c76bc84cdc78cbe237abc87378
Reviewed-on: https://dart-review.googlesource.com/69243
Reviewed-by: Stephen Adams <sra@google.com>
Commit-Queue: Sigmund Cherem <sigmund@google.com>
Kevin Moore