There are two possible flags for each source position currently:
a flag that marks the source position as synthetic and a flag that
marks the source position as within a yield point.
Synthetic source positions in bytecode are treated the same as synthetic
source positions in compiled code. That is, they encode the source
position in the text that caused them to be synthesized, but denote that
the covered instructions are internal and not to be used for debugger
pause points or for call site/branch coverage information.
Adding these flags allow us to mark appropriate parts of the async
machinery as synthetic, and also allow us to mark all the bytecode
involved in yield points as having the same token position.
The latter fixes tests where the code would step over a previous
expression, thus being paused at the start of the await bytecode,
and would record the fp and token position there as the ones to
ignore. However, since a new source position wasn't emitted until the
direct call to the await method, the recorded token position would
be the token position prior to the await call, and so the change
in token position at the await call would trigger an early pause.
TEST=pkg/vm_service/test/async_single_step_exception_test
pkg/vm_service/test/async_single_step_into_test
pkg/vm_service/test/async_single_step_out_test
pkg/vm_service/test/async_star_single_step_into_test
pkg/vm_service/test/async_step_out_test
pkg/vm_service/test/positive_token_pos_test
pkg/vm_service/test/step_into_async_no_await_test
Cq-Include-Trybots: luci.dart.try:vm-dyn-linux-debug-x64-try,vm-aot-dyn-linux-debug-x64-try,vm-aot-dyn-linux-product-x64-try,vm-dyn-mac-debug-arm64-try,vm-aot-linux-debug-x64-try,vm-aot-linux-product-x64-try
Change-Id: Ic7642a74fb76227a473f461f360e84dd3d5a45a1
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/453322
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
* Switch UInt32 from big-endian to little-endian encoding.
* Reorder object kinds, constant tags, type tags and constant pool tags.
* Reorder field and function flags.
* Cleanup yield point marker from source positions.
TEST=ci
Change-Id: I05ee940b6393a478831af11ac93fee9ec1441c4e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/384040
Reviewed-by: Slava Egorov <vegorov@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
With sound null safety front-end guarantees that all logical
expressions have a non-nullable bool type, so legacy AssertBoolean
checks are no longer needed and can be removed.
TEST=ci
Change-Id: If952da7bd0ac83c43de3e5d98845c5e5d8d29f6a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/382744
Reviewed-by: Alexander Aprelev <aam@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
* Use AllocateClosure instruction for closure instantiations in order
to initialize closure entry point.
* Fix null handling in operator== to be before argument type checks.
* Add _InvocationMirror._withType to dynamic interface as it is
implicitly used by noSuchMethod forwarders.
* Fix AssertAssignable for null objects.
TEST=language tests in vm-aot-dyn-linux-debug-x64 configuration
Change-Id: I7b1a037d4fde4d22ed32969e0f099b31ea4432ab
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/382500
Reviewed-by: Slava Egorov <vegorov@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Add dart2bytecode tool which takes Dart sources and produces
Dart bytecode. The tool uses common front-end (CFE) to parse Dart
source code and contains bytecode generator which translates
kernel AST to bytecode.
Change-Id: I90bd6e72c619cf0edc556da0640760b30e81091d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/378560
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Slava Egorov <vegorov@google.com>
Tess Strickland