Remove support for object grouping during Garbage Collection

runtime/vm/thread_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 "platform/assert.h"
 #include "vm/isolate.h"
 #include "vm/lockers.h"
 #include "vm/unit_test.h"
 #include "vm/profiler.h"
 #include "vm/thread_pool.h"
@@ skipping 116 matching lines @@
       EXPECT(str.Equals("old"));
 
       const intptr_t unique_smi = id_ + 928327281;
       Smi& smi = Smi::Handle(zone, Smi::New(unique_smi));
       EXPECT(smi.Value() == unique_smi);
       {
         ObjectCounter counter(isolate_, &smi);
         // Ensure that our particular zone is visited.
         isolate_->IterateObjectPointers(
             &counter,
-            /* visit_prologue_weak_handles = */ true,
             StackFrameIterator::kValidateFrames);
         EXPECT_EQ(1, counter.count());
       }
       char* unique_chars = zone->PrintToString("unique_str_%" Pd, id_);
       String& unique_str = String::Handle(zone);
       {
         // String::New may create additional handles in the topmost scope that
         // we don't want to count, so wrap this in its own scope.
         HANDLESCOPE(thread);
         unique_str = String::New(unique_chars, Heap::kOld);
       }
       EXPECT(unique_str.Equals(unique_chars));
       {
         ObjectCounter str_counter(isolate_, &unique_str);
         // Ensure that our particular zone is visited.
         isolate_->IterateObjectPointers(
             &str_counter,
-            /* visit_prologue_weak_handles = */ true,
             StackFrameIterator::kValidateFrames);
         // We should visit the string object exactly once.
         EXPECT_EQ(1, str_counter.count());
       }
     }
     Thread::ExitIsolateAsHelper();
     {
       MonitorLocker ml(monitor_);
       *done_ = true;
       ml.Notify();
@@ skipping 106 matching lines @@
       Smi& smi = Smi::Handle(zone, Smi::New(kUniqueSmi));
       if ((i % 100) != 0) {
         // Usually, we just cooperate.
         isolate_->thread_registry()->CheckSafepoint();
       } else {
         // But occasionally, organize a rendezvous.
         isolate_->thread_registry()->SafepointThreads();
         ObjectCounter counter(isolate_, &smi);
         isolate_->IterateObjectPointers(
             &counter,
-            /* visit_prologue_weak_handles = */ true,
             StackFrameIterator::kValidateFrames);
         {
           MutexLocker ml(mutex_);
           EXPECT_EQ(*expected_count_, counter.count());
         }
         UserTag& tag = UserTag::Handle(zone, isolate_->current_tag());
         if (tag.raw() != isolate_->default_tag()) {
           String& label = String::Handle(zone, tag.label());
           EXPECT(label.Equals("foo"));
           MutexLocker ml(mutex_);
@@ skipping 287 matching lines @@
       isolate->thread_registry()->CheckSafepoint();
       MonitorLocker ml(&done_monitor);
       if (done) {
         break;
       }
     }
   }
 }
 
 }  // namespace dart