Previously, it would always call the ResumeInterpreter runtime entry
passing null as the value to return to the resumed code. Instead,
appropriately retrieve the to-be-returned value from the stack.
Also fixes IL printing to print constants in non-SSA flow graphs and
adds Interpreter::TraceStackFrames, which prints the top frames of the
current stack, so calls to it can be added for easier debugging in the
future.
TEST=pkg/vm_service/test/async_star_step_out_test.dart
(still fails, but the failure changes due to no longer spuriously
calling get:current after the generator finishes)
Cq-Include-Trybots: luci.dart.try:vm-dyn-linux-debug-x64-try
Change-Id: Ibb3524d32c8c4e1320f4f9dfd35947eda7d6ca68
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/488181
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
Tess Strickland
32b8c8f12f