Keep track of stack base whenever Dart code is invoked.

runtime/vm/profiler.cc

Index: runtime/vm/profiler.cc
diff --git a/runtime/vm/profiler.cc b/runtime/vm/profiler.cc
index 690a23b53ebd9dd89659729d2d3988531c7e30bf..c4786b04775cdcbaf8bbb80cd0ef3bf511af28be 100644
--- a/runtime/vm/profiler.cc
+++ b/runtime/vm/profiler.cc
@@ -2000,7 +2000,7 @@ void Profiler::RecordSampleInterruptCallback(
 
   uword stack_lower = 0;
   uword stack_upper = 0;
-  isolate->GetStackBounds(&stack_lower, &stack_upper);
+  isolate->GetProfilerStackBounds(&stack_lower, &stack_upper);
   if ((stack_lower == 0) || (stack_upper == 0)) {
     // Could not get stack boundary.
     return;