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

runtime/vm/class_table.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/class_table.h"
 
 #include "vm/atomic.h"
 #include "vm/flags.h"
 #include "vm/freelist.h"
 #include "vm/growable_array.h"
@@ skipping 65 matching lines @@
     NOT_IN_PRODUCT(free(predefined_class_heap_stats_table_));
     NOT_IN_PRODUCT(free(class_heap_stats_table_));
   } else {
     // This instance was a shallow copy. It doesn't own any memory.
     NOT_IN_PRODUCT(ASSERT(predefined_class_heap_stats_table_ == NULL));
     NOT_IN_PRODUCT(ASSERT(class_heap_stats_table_ == NULL));
   }
 }
 
 
+void ClassTable::AddOldTable(RawClass** old_table) {
+  ASSERT(Thread::Current()->IsMutatorThread());
+  old_tables_->Add(old_table);
+}
+
+
 void ClassTable::FreeOldTables() {
   while (old_tables_->length() > 0) {
     free(old_tables_->RemoveLast());
   }
 }
 
 
 #ifndef PRODUCT
 void ClassTable::SetTraceAllocationFor(intptr_t cid, bool trace) {
   ClassHeapStats* stats = PreliminaryStatsAt(cid);
@@ skipping 474 matching lines @@
 void ClassTable::UpdateLiveNew(intptr_t cid, intptr_t size) {
   ClassHeapStats* stats = PreliminaryStatsAt(cid);
   ASSERT(stats != NULL);
   ASSERT(size >= 0);
   stats->post_gc.AddNew(size);
 }
 #endif  // !PRODUCT
 
 
 }  // namespace dart