Compile and simulate first dart function on arm generated from ast.

runtime/vm/isolate.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/isolate.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "lib/mirrors.h"
 #include "vm/code_observers.h"
@@ skipping 370 matching lines @@
 // TODO(5411455): Use flag to override default value and Validate the
 // stack size by querying OS.
 uword Isolate::GetSpecifiedStackSize() {
   ASSERT(Isolate::kStackSizeBuffer < Thread::GetMaxStackSize());
   uword stack_size = Thread::GetMaxStackSize() - Isolate::kStackSizeBuffer;
   return stack_size;
 }
 
 
 void Isolate::SetStackLimitFromCurrentTOS(uword stack_top_value) {
+#ifdef USING_SIMULATOR
+  // Ignore passed-in native stack top and use Simulator stack top.
+  Simulator* sim = Simulator::Current();  // May allocate a simulator.
+  ASSERT(simulator() == sim);  // This isolate's simulator is the current one.
+  stack_top_value = sim->StackTop();
+  // The overflow area is accounted for by the simulator.
+#endif
   SetStackLimit(stack_top_value - GetSpecifiedStackSize());
 }
 
 
 void Isolate::SetStackLimit(uword limit) {
   MutexLocker ml(mutex_);
   if (stack_limit_ == saved_stack_limit_) {
     // No interrupt pending, set stack_limit_ too.
     stack_limit_ = limit;
   }
@@ skipping 220 matching lines @@
 
 
 void Isolate::VisitWeakPersistentHandles(HandleVisitor* visitor,
                                          bool visit_prologue_weak_handles) {
   if (api_state() != NULL) {
     api_state()->VisitWeakHandles(visitor, visit_prologue_weak_handles);
   }
 }
 
 }  // namespace dart