Since any instruction is a possible pause point when single stepping in
the interpreter, the debugger may pause too early when stepping over an
expression; for example, if the value returned from an expression is
ignored, stepping over the expression should also step over the
following Drop1 instruction (which will have the same source location),
but currently does not.
To avoid this, set last_stepping_fp_ and last_stepping_pos_ when
stepping over either a sync or async expression so that the debugger
won't pause until a new source position is reached.
TEST=pkg/vm_service/test
Cq-Include-Trybots: luci.dart.try:vm-dyn-linux-debug-x64-try,vm-dyn-mac-debug-arm64-try
Change-Id: I0934f6bda3fc075a225a85b66eccf46b94cb4020
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/449420
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
Tess Strickland
2871699e89