Reload: Don't free the saved class table while another thread may be reading it.

runtime/vm/unit_test.cc

 // Copyright (c) 2012, 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/unit_test.h"
 
 #include <stdio.h>
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
@@ skipping 313 matching lines @@
 Dart_Handle TestCase::ReloadTestScript(const char* script) {
   SetReloadTestScript(script);
 
   Dart_Handle result = TriggerReload();
   if (Dart_IsError(result)) {
     return result;
   }
 
   result = GetReloadErrorOrRootLibrary();
 
-  Isolate* isolate = Isolate::Current();
-  if (isolate->reload_context() != NULL) {
-    isolate->DeleteReloadContext();
+  {
+    Thread* thread = Thread::Current();
+    TransitionNativeToVM transition(thread);
+    Isolate* isolate = thread->isolate();
+    if (isolate->reload_context() != NULL) {
+      isolate->DeleteReloadContext();
+    }
   }
 
   return result;
 }
 
 
 #endif  // !PRODUCT
 
 
 Dart_Handle TestCase::LoadCoreTestScript(const char* script,
@@ skipping 144 matching lines @@
   }
   // Copy the remainder of in to out.
   while (*in != '\0') {
     *out++ = *in++;
   }
   *out = '\0';
 }
 
 
 }  // namespace dart