Add test of full GC on helper thread

runtime/vm/heap.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/heap.h"
 
 #include "platform/assert.h"
 #include "platform/utils.h"
 #include "vm/flags.h"
 #include "vm/isolate.h"
@@ skipping 73 matching lines @@
     if (addr == 0) {
       return AllocateOld(size, HeapPage::kData);
     }
   }
   return addr;
 }
 
 
 uword Heap::AllocateOld(intptr_t size, HeapPage::PageType type) {
   ASSERT(Thread::Current()->no_safepoint_scope_depth() == 0);
-#if defined(DEBUG)
-  // Currently, allocation from non-Dart threads must not trigger GC.
-  if (GrowthControlState()) {
-    isolate()->AssertCurrentThreadIsMutator();
-  }
-#endif
   uword addr = old_space_.TryAllocate(size, type);
   if (addr != 0) {
     return addr;
   }
   // If we are in the process of running a sweep wait for the sweeper to free
   // memory.
   {
     MonitorLocker ml(old_space_.tasks_lock());
     addr = old_space_.TryAllocate(size, type);
     while ((addr == 0) && (old_space_.tasks() > 0)) {
@@ skipping 323 matching lines @@
     return pretenure_policy_ > 0;
   } else {
     return false;
   }
 }
 
 
 void Heap::UpdatePretenurePolicy() {
   if (FLAG_disable_alloc_stubs_after_gc) {
     ClassTable* table = isolate_->class_table();
+    Zone* zone = Thread::Current()->zone();
     for (intptr_t cid = 1; cid < table->NumCids(); ++cid) {
       if (((cid >= kNumPredefinedCids) || (cid == kArrayCid)) &&
           table->IsValidIndex(cid) &&
           table->HasValidClassAt(cid)) {
-        const Class& cls = Class::Handle(isolate_, table->At(cid));
+        const Class& cls = Class::Handle(zone, table->At(cid));
         cls.DisableAllocationStub();
       }
     }
   }
   ClassHeapStats* stats =
       isolate_->class_table()->StatsWithUpdatedSize(kOneByteStringCid);
   int allocated = stats->pre_gc.new_count;
   int promo_percent = (allocated == 0) ? 0 :
       (100 * stats->promoted_count) / allocated;
   if (promo_percent >= FLAG_pretenure_threshold) {
@@ skipping 320 matching lines @@
     heap->DisableGrowthControl();
 }
 
 
 NoHeapGrowthControlScope::~NoHeapGrowthControlScope() {
     Heap* heap = reinterpret_cast<Isolate*>(isolate())->heap();
     heap->SetGrowthControlState(current_growth_controller_state_);
 }
 
 }  // namespace dart