Allow for recursive invocation of SafepointOperationScopes.

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 "include/dart_native_api.h"
 #include "platform/assert.h"
 #include "platform/text_buffer.h"
@@ skipping 2509 matching lines @@
   if (os_thread != NULL) {
     // We are about to associate the thread with an isolate and it would
     // not be possible to correctly track no_safepoint_scope_depth for the
     // thread in the constructor/destructor of MonitorLocker,
     // so we create a MonitorLocker object which does not do any
     // no_safepoint_scope_depth increments/decrements.
     MonitorLocker ml(threads_lock(), false);
 
     // If a safepoint operation is in progress wait for it
     // to finish before scheduling this thread in.
-    while (!bypass_safepoint && safepoint_handler()->safepoint_in_progress()) {
+    while (!bypass_safepoint && safepoint_handler()->SafepointInProgress()) {
       ml.Wait();
     }
 
     // Now get a free Thread structure.
     thread = thread_registry()->GetFreeThreadLocked(this, is_mutator);
     ASSERT(thread != NULL);
 
     // Set up other values and set the TLS value.
     thread->isolate_ = this;
     ASSERT(heap() != NULL);
@@ skipping 290 matching lines @@
 void IsolateSpawnState::DecrementSpawnCount() {
   ASSERT(spawn_count_monitor_ != NULL);
   ASSERT(spawn_count_ != NULL);
   MonitorLocker ml(spawn_count_monitor_);
   ASSERT(*spawn_count_ > 0);
   *spawn_count_ = *spawn_count_ - 1;
   ml.Notify();
 }
 
 }  // namespace dart