| commit | e20dc20543df953b29666ff61a6e562c9e91fea2 | [log] [tgz] |
|---|---|---|
| author | Martin Kustermann <kustermann@google.com> | Fri Jul 19 07:53:01 2024 +0000 |
| committer | Commit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com> | Fri Jul 19 07:53:01 2024 +0000 |
| tree | dd658bff78312837f3b3c15f140a4180b6b03d04 | |
| parent | 35a595f66b2f55deb88e88f12fb7b89e622d26cc [diff] |
[beta] [dart2wasm] Generate source maps
This implements generating source maps for the generated Wasm files.
Copying dart2js's command line interface, a source map file with the
name `<program name>.wasm.map` is generated unless `--no-source-maps` is
passed.
When a source map is generated, the generated .wasm file gets a new
section `sourceMappingURL` with the contents `<program name>.wasm.map`.
This section seems to be undocumented, but Chrome and binaryen recognize
it as the URI to the source map file. Chrome is then loads it
automatically in the DevTools.
- `wasm_builder` package is updated with the new `source_map` library,
which describes the source mapping entries.
- `wasm_builder`'s `InstructionsBuilder` is updated with the new public
members:
- `startSourceMapping`: starts mapping the instructions generated to
the given source code.
- `stopSourceMapping`: stops mapping the instructions generated to a
source code. These instructions won't have a mapping in the source
map.
- `CodeGenerator` sets the source file URI and location in the file
when:
- Starting compiling a new member
- Compiling an expression and statement
Bug: https://github.com/dart-lang/sdk/issues/55763
Change-Id: Ieb24796b4b17a735b846793617664a453f1061ce
Cherry-pick: https://dart-review.googlesource.com/c/sdk/+/370500
Cherry-pick-request: https://github.com/dart-lang/sdk/issues/56239
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/375660
Reviewed-by: Ömer Ağacan <omersa@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
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