Implement safepointing of threads

runtime/vm/runtime_entry.h

 // Copyright (c) 2011, 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.
 
 #ifndef VM_RUNTIME_ENTRY_H_
 #define VM_RUNTIME_ENTRY_H_
 
 #include "vm/allocation.h"
 #include "vm/flags.h"
 #include "vm/native_arguments.h"
 #include "vm/runtime_entry_list.h"
+#include "vm/safepoint.h"
 #include "vm/tags.h"
 
 namespace dart {
 
 class Assembler;
 
 DECLARE_FLAG(bool, trace_runtime_calls);
 
 typedef void (*RuntimeFunction)(NativeArguments arguments);
 
@@ skipping 66 matching lines @@
                                NativeArguments arguments);                     \
   void DRT_##name(NativeArguments arguments) {                                 \
     CHECK_STACK_ALIGNMENT;                                                     \
     VERIFY_ON_TRANSITION;                                                      \
     ASSERT(arguments.ArgCount() == argument_count);                            \
     if (FLAG_trace_runtime_calls) OS::Print("Runtime call: %s\n", ""#name);    \
     {                                                                          \
       Thread* thread = arguments.thread();                                     \
       ASSERT(thread == Thread::Current());                                     \
       Isolate* isolate = thread->isolate();                                    \
+      TransitionGeneratedToVM transition(thread);                              \
       StackZone zone(thread);                                                  \
       HANDLESCOPE(thread);                                                     \
       DRT_Helper##name(isolate, thread, zone.GetZone(), arguments);            \
     }                                                                          \
     VERIFY_ON_TRANSITION;                                                      \
   }                                                                            \
   static void DRT_Helper##name(Isolate* isolate,                               \
                                Thread* thread,                                 \
                                Zone* zone,                                     \
                                NativeArguments arguments)
@@ skipping 61 matching lines @@
 #define CHECK_LEAF_RUNTIME_ADDRESS(type, name, ...)                            \
   if (address == k##name##RuntimeEntry.GetEntryPoint()) return k##name##Id;
   LEAF_RUNTIME_ENTRY_LIST(CHECK_LEAF_RUNTIME_ADDRESS)
 #undef CHECK_LEAF_RUNTIME_ADDRESS
   return kNoRuntimeFunctionId;
 }
 
 }  // namespace dart
 
 #endif  // VM_RUNTIME_ENTRY_H_