Introduce a helper library to trim components based on what we believe
it is needed for modular bytecode compilation. The script is configured
to accept a set of entry points, so unreachable libraries can be removed
entirely. The contents of the retained libraries is trimmed to remove
method bodies, constructor bodies, and initializers, except for where
they may be needed.
In the near future, this should be expanded to:
* include proper unit testing in the CFE
* review whether additional trimming operations can be made
* consider an explicit representation of trimmed content, to help the
CFE recover when assumptions are not met (e.g. sentinel markers
to establish whether a value has been trimmed)
* CFE produces trimmed data directly if needed, without having to first
produce the full dill.
Tests that specifically stress that we don't over-trim include:
apply_mixin (requires preserving method bodies), const_body (requires
preserving initializers).
TEST=existing and new e2e dynamic module aot tests.
b/394936876
Change-Id: I26db8385bdfe1664b2aea234ec8bb896c7c21230
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/418702
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Sigmund Cherem <sigmund@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
This CL introduces a test runner and test cases under
`pkg/dynamic_modules/test/`. These tests are end-to-end tests that
specifically target the dynamic modules semantics. This includes:
* semantics expecations on the program evolutions (e.g. libraries
defined only once)
* individual cases around the dynamic interface (callable, extensible,
overrides).
We should continue to add more test as we discover coner cases worth validating
(e.g. mixins, constants, etc).
The suite is not yet integrated to the test matrix, my plan is to do so
after we have some initial targets set up.
Change-Id: I2a63946c36d99baacb6fb7edc01c4ef377ce20b6
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/379921
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Sigmund Cherem <sigmund@google.com>
Sigmund Cherem