Handle stepping requests after isolate interrupt event

runtime/vm/code_generator.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/code_generator.h"
 
 #include "vm/assembler.h"
 #include "vm/ast.h"
 #include "vm/bigint_operations.h"
 #include "vm/code_patcher.h"
@@ skipping 1184 matching lines @@
   if (interrupt_bits & Isolate::kStoreBufferInterrupt) {
     if (FLAG_verbose_gc) {
       OS::PrintErr("Scavenge scheduled by store buffer overflow.\n");
     }
     isolate->heap()->CollectGarbage(Heap::kNew);
   }
   if (interrupt_bits & Isolate::kMessageInterrupt) {
     isolate->message_handler()->HandleOOBMessages();
   }
   if (interrupt_bits & Isolate::kApiInterrupt) {
-    // Signal isolate interrupt  event.
-    Debugger::SignalIsolateEvent(Debugger::kIsolateInterrupted);
+    // Signal isolate interrupt event.
+    Debugger::SignalIsolateInterrupted();
 
     Dart_IsolateInterruptCallback callback = isolate->InterruptCallback();
     if (callback) {
       if ((*callback)()) {
         return;
       } else {
         // TODO(turnidge): Unwind the stack.
         UNIMPLEMENTED();
       }
     }
@@ skipping 376 matching lines @@
 // of the given value.
 //   Arg0: Field object;
 //   Arg1: Value that is being stored.
 DEFINE_RUNTIME_ENTRY(UpdateFieldCid, 2) {
   const Field& field = Field::CheckedHandle(arguments.ArgAt(0));
   const Object& value = Object::Handle(arguments.ArgAt(1));
   field.UpdateGuardedCidAndLength(value);
 }
 
 }  // namespace dart